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mwritescode

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slither-audited-smart-contracts

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0x6798b4ED23fCB54E7373e221ff1Bc3a8117980Dc

pragma solidity 0.7.2; interface IERC20 { function totalSupply() external view returns (uint256); function balanceOf(address account) external view returns (uint256); function transfer(address recipient, uint256 amount) external returns (bool); function allowance(address owner, address spender) external view returns (uint256); function approve(address spender, uint256 amount) external returns (bool); function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); event Transfer(address indexed from, address indexed to, uint256 value); event Approval(address indexed owner, address indexed spender, uint256 value); } interface IERC20 { function totalSupply() external view returns (uint256); function balanceOf(address account) external view returns (uint256); function transfer(address recipient, uint256 amount) external returns (bool); function allowance(address owner, address spender) external view returns (uint256); function approve(address spender, uint256 amount) external returns (bool); function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); event Transfer(address indexed from, address indexed to, uint256 value); event Approval(address indexed owner, address indexed spender, uint256 value); } contract TokenTimelock { IERC20 private _token; address private _beneficiary; uint256 private _releaseTime; constructor (IERC20 token, address beneficiary, uint256 timeLockDays) public { // solhint-disable-next-line not-rely-on-time _token = token; _beneficiary = beneficiary; _releaseTime = block.timestamp + (timeLockDays*24*3600); require(_releaseTime > block.timestamp, "ERROR"); } function token() public view returns (IERC20) { return _token; } function balance() public view returns (uint256) { return _token.balanceOf(address(this)); } function beneficiary() public view returns (address) { return _beneficiary; } function releaseTime() public view returns (uint256) { return _releaseTime; } function getBlockTimestamp() public view returns (uint256) { return block.timestamp; } function canRelease() public view returns (bool) { if(_releaseTime < block.timestamp){return true;} else {return false;} } function release() public virtual { // solhint-disable-next-line not-rely-on-time require(block.timestamp >= _releaseTime, "TokenTimelock: current time is before release time"); uint256 amount = _token.balanceOf(address(this)); require(amount > 0, "TokenTimelock: no tokens to release"); _token.transfer(_beneficiary, amount); } }

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

{"success": true, "error": null, "results": {"detectors": [{"check": "unchecked-transfer", "impact": "High", "confidence": "Medium"}, {"check": "name-reused", "impact": "High", "confidence": "High"}]}}

0x679E8Bf1Be2195B899FB36Cd04A7D7d01089b548

pragma solidity 0.4.25; interface IBondingCurve { /** * @dev Given a reserve token amount, calculates the amount of continuous tokens returned. */ function getContinuousMintReward(uint _reserveTokenAmount) external view returns (uint); /** * @dev Given a continuous token amount, calculates the amount of reserve tokens returned. */ function getContinuousBurnRefund(uint _continuousTokenAmount) external view returns (uint); } interface IERC20 { function totalSupply() external view returns (uint256); function balanceOf(address who) external view returns (uint256); function allowance(address owner, address spender) external view returns (uint256); function transfer(address to, uint256 value) external returns (bool); function approve(address spender, uint256 value) external returns (bool); function transferFrom(address from, address to, uint256 value) external returns (bool); event Transfer( address indexed from, address indexed to, uint256 value ); event Approval( address indexed owner, address indexed spender, uint256 value ); } contract Ownable { address private _owner; event OwnershipTransferred( address indexed previousOwner, address indexed newOwner ); /** * @dev The Ownable constructor sets the original `owner` of the contract to the sender * account. */ constructor() internal { _owner = msg.sender; emit OwnershipTransferred(address(0), _owner); } /** * @return the address of the owner. */ function owner() public view returns(address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(isOwner()); _; } /** * @return true if `msg.sender` is the owner of the contract. */ function isOwner() public view returns(bool) { return msg.sender == _owner; } /** * @dev Allows the current owner to relinquish control of the contract. * @notice Renouncing to ownership will leave the contract without an owner. * It will not be possible to call the functions with the `onlyOwner` * modifier anymore. */ function renounceOwnership() public onlyOwner { emit OwnershipTransferred(_owner, address(0)); _owner = address(0); } /** * @dev Allows the current owner to transfer control of the contract to a newOwner. * @param newOwner The address to transfer ownership to. */ function transferOwnership(address newOwner) public onlyOwner { _transferOwnership(newOwner); } /** * @dev Transfers control of the contract to a newOwner. * @param newOwner The address to transfer ownership to. */ function _transferOwnership(address newOwner) internal { require(newOwner != address(0)); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } } contract Power { string public version = "0.3"; uint256 private constant ONE = 1; uint32 private constant MAX_WEIGHT = 1000000; uint8 private constant MIN_PRECISION = 32; uint8 private constant MAX_PRECISION = 127; /** The values below depend on MAX_PRECISION. If you choose to change it: Apply the same change in file 'PrintIntScalingFactors.py', run it and paste the results below. */ uint256 private constant FIXED_1 = 0x080000000000000000000000000000000; uint256 private constant FIXED_2 = 0x100000000000000000000000000000000; uint256 private constant MAX_NUM = 0x200000000000000000000000000000000; /** Auto-generated via 'PrintLn2ScalingFactors.py' */ uint256 private constant LN2_NUMERATOR = 0x3f80fe03f80fe03f80fe03f80fe03f8; uint256 private constant LN2_DENOMINATOR = 0x5b9de1d10bf4103d647b0955897ba80; /** Auto-generated via 'PrintFunctionOptimalLog.py' and 'PrintFunctionOptimalExp.py' */ uint256 private constant OPT_LOG_MAX_VAL = 0x15bf0a8b1457695355fb8ac404e7a79e3; uint256 private constant OPT_EXP_MAX_VAL = 0x800000000000000000000000000000000; /** The values below depend on MIN_PRECISION and MAX_PRECISION. If you choose to change either one of them: Apply the same change in file 'PrintFunctionBancorFormula.py', run it and paste the results below. */ uint256[128] private maxExpArray; constructor() public { // maxExpArray[0] = 0x6bffffffffffffffffffffffffffffffff; // maxExpArray[1] = 0x67ffffffffffffffffffffffffffffffff; // maxExpArray[2] = 0x637fffffffffffffffffffffffffffffff; // maxExpArray[3] = 0x5f6fffffffffffffffffffffffffffffff; // maxExpArray[4] = 0x5b77ffffffffffffffffffffffffffffff; // maxExpArray[5] = 0x57b3ffffffffffffffffffffffffffffff; // maxExpArray[6] = 0x5419ffffffffffffffffffffffffffffff; // maxExpArray[7] = 0x50a2ffffffffffffffffffffffffffffff; // maxExpArray[8] = 0x4d517fffffffffffffffffffffffffffff; // maxExpArray[9] = 0x4a233fffffffffffffffffffffffffffff; // maxExpArray[10] = 0x47165fffffffffffffffffffffffffffff; // maxExpArray[11] = 0x4429afffffffffffffffffffffffffffff; // maxExpArray[12] = 0x415bc7ffffffffffffffffffffffffffff; // maxExpArray[13] = 0x3eab73ffffffffffffffffffffffffffff; // maxExpArray[14] = 0x3c1771ffffffffffffffffffffffffffff; // maxExpArray[15] = 0x399e96ffffffffffffffffffffffffffff; // maxExpArray[16] = 0x373fc47fffffffffffffffffffffffffff; // maxExpArray[17] = 0x34f9e8ffffffffffffffffffffffffffff; // maxExpArray[18] = 0x32cbfd5fffffffffffffffffffffffffff; // maxExpArray[19] = 0x30b5057fffffffffffffffffffffffffff; // maxExpArray[20] = 0x2eb40f9fffffffffffffffffffffffffff; // maxExpArray[21] = 0x2cc8340fffffffffffffffffffffffffff; // maxExpArray[22] = 0x2af09481ffffffffffffffffffffffffff; // maxExpArray[23] = 0x292c5bddffffffffffffffffffffffffff; // maxExpArray[24] = 0x277abdcdffffffffffffffffffffffffff; // maxExpArray[25] = 0x25daf6657fffffffffffffffffffffffff; // maxExpArray[26] = 0x244c49c65fffffffffffffffffffffffff; // maxExpArray[27] = 0x22ce03cd5fffffffffffffffffffffffff; // maxExpArray[28] = 0x215f77c047ffffffffffffffffffffffff; // maxExpArray[29] = 0x1fffffffffffffffffffffffffffffffff; // maxExpArray[30] = 0x1eaefdbdabffffffffffffffffffffffff; // maxExpArray[31] = 0x1d6bd8b2ebffffffffffffffffffffffff; maxExpArray[32] = 0x1c35fedd14ffffffffffffffffffffffff; maxExpArray[33] = 0x1b0ce43b323fffffffffffffffffffffff; maxExpArray[34] = 0x19f0028ec1ffffffffffffffffffffffff; maxExpArray[35] = 0x18ded91f0e7fffffffffffffffffffffff; maxExpArray[36] = 0x17d8ec7f0417ffffffffffffffffffffff; maxExpArray[37] = 0x16ddc6556cdbffffffffffffffffffffff; maxExpArray[38] = 0x15ecf52776a1ffffffffffffffffffffff; maxExpArray[39] = 0x15060c256cb2ffffffffffffffffffffff; maxExpArray[40] = 0x1428a2f98d72ffffffffffffffffffffff; maxExpArray[41] = 0x13545598e5c23fffffffffffffffffffff; maxExpArray[42] = 0x1288c4161ce1dfffffffffffffffffffff; maxExpArray[43] = 0x11c592761c666fffffffffffffffffffff; maxExpArray[44] = 0x110a688680a757ffffffffffffffffffff; maxExpArray[45] = 0x1056f1b5bedf77ffffffffffffffffffff; maxExpArray[46] = 0x0faadceceeff8bffffffffffffffffffff; maxExpArray[47] = 0x0f05dc6b27edadffffffffffffffffffff; maxExpArray[48] = 0x0e67a5a25da4107fffffffffffffffffff; maxExpArray[49] = 0x0dcff115b14eedffffffffffffffffffff; maxExpArray[50] = 0x0d3e7a392431239fffffffffffffffffff; maxExpArray[51] = 0x0cb2ff529eb71e4fffffffffffffffffff; maxExpArray[52] = 0x0c2d415c3db974afffffffffffffffffff; maxExpArray[53] = 0x0bad03e7d883f69bffffffffffffffffff; maxExpArray[54] = 0x0b320d03b2c343d5ffffffffffffffffff; maxExpArray[55] = 0x0abc25204e02828dffffffffffffffffff; maxExpArray[56] = 0x0a4b16f74ee4bb207fffffffffffffffff; maxExpArray[57] = 0x09deaf736ac1f569ffffffffffffffffff; maxExpArray[58] = 0x0976bd9952c7aa957fffffffffffffffff; maxExpArray[59] = 0x09131271922eaa606fffffffffffffffff; maxExpArray[60] = 0x08b380f3558668c46fffffffffffffffff; maxExpArray[61] = 0x0857ddf0117efa215bffffffffffffffff; maxExpArray[62] = 0x07ffffffffffffffffffffffffffffffff; maxExpArray[63] = 0x07abbf6f6abb9d087fffffffffffffffff; maxExpArray[64] = 0x075af62cbac95f7dfa7fffffffffffffff; maxExpArray[65] = 0x070d7fb7452e187ac13fffffffffffffff; maxExpArray[66] = 0x06c3390ecc8af379295fffffffffffffff; maxExpArray[67] = 0x067c00a3b07ffc01fd6fffffffffffffff; maxExpArray[68] = 0x0637b647c39cbb9d3d27ffffffffffffff; maxExpArray[69] = 0x05f63b1fc104dbd39587ffffffffffffff; maxExpArray[70] = 0x05b771955b36e12f7235ffffffffffffff; maxExpArray[71] = 0x057b3d49dda84556d6f6ffffffffffffff; maxExpArray[72] = 0x054183095b2c8ececf30ffffffffffffff; maxExpArray[73] = 0x050a28be635ca2b888f77fffffffffffff; maxExpArray[74] = 0x04d5156639708c9db33c3fffffffffffff; maxExpArray[75] = 0x04a23105873875bd52dfdfffffffffffff; maxExpArray[76] = 0x0471649d87199aa990756fffffffffffff; maxExpArray[77] = 0x04429a21a029d4c1457cfbffffffffffff; maxExpArray[78] = 0x0415bc6d6fb7dd71af2cb3ffffffffffff; maxExpArray[79] = 0x03eab73b3bbfe282243ce1ffffffffffff; maxExpArray[80] = 0x03c1771ac9fb6b4c18e229ffffffffffff; maxExpArray[81] = 0x0399e96897690418f785257fffffffffff; maxExpArray[82] = 0x0373fc456c53bb779bf0ea9fffffffffff; maxExpArray[83] = 0x034f9e8e490c48e67e6ab8bfffffffffff; maxExpArray[84] = 0x032cbfd4a7adc790560b3337ffffffffff; maxExpArray[85] = 0x030b50570f6e5d2acca94613ffffffffff; maxExpArray[86] = 0x02eb40f9f620fda6b56c2861ffffffffff; maxExpArray[87] = 0x02cc8340ecb0d0f520a6af58ffffffffff; maxExpArray[88] = 0x02af09481380a0a35cf1ba02ffffffffff; maxExpArray[89] = 0x0292c5bdd3b92ec810287b1b3fffffffff; maxExpArray[90] = 0x0277abdcdab07d5a77ac6d6b9fffffffff; maxExpArray[91] = 0x025daf6654b1eaa55fd64df5efffffffff; maxExpArray[92] = 0x0244c49c648baa98192dce88b7ffffffff; maxExpArray[93] = 0x022ce03cd5619a311b2471268bffffffff; maxExpArray[94] = 0x0215f77c045fbe885654a44a0fffffffff; maxExpArray[95] = 0x01ffffffffffffffffffffffffffffffff; maxExpArray[96] = 0x01eaefdbdaaee7421fc4d3ede5ffffffff; maxExpArray[97] = 0x01d6bd8b2eb257df7e8ca57b09bfffffff; maxExpArray[98] = 0x01c35fedd14b861eb0443f7f133fffffff; maxExpArray[99] = 0x01b0ce43b322bcde4a56e8ada5afffffff; maxExpArray[100] = 0x019f0028ec1fff007f5a195a39dfffffff; maxExpArray[101] = 0x018ded91f0e72ee74f49b15ba527ffffff; maxExpArray[102] = 0x017d8ec7f04136f4e5615fd41a63ffffff; maxExpArray[103] = 0x016ddc6556cdb84bdc8d12d22e6fffffff; maxExpArray[104] = 0x015ecf52776a1155b5bd8395814f7fffff; maxExpArray[105] = 0x015060c256cb23b3b3cc3754cf40ffffff; maxExpArray[106] = 0x01428a2f98d728ae223ddab715be3fffff; maxExpArray[107] = 0x013545598e5c23276ccf0ede68034fffff; maxExpArray[108] = 0x01288c4161ce1d6f54b7f61081194fffff; maxExpArray[109] = 0x011c592761c666aa641d5a01a40f17ffff; maxExpArray[110] = 0x0110a688680a7530515f3e6e6cfdcdffff; maxExpArray[111] = 0x01056f1b5bedf75c6bcb2ce8aed428ffff; maxExpArray[112] = 0x00faadceceeff8a0890f3875f008277fff; maxExpArray[113] = 0x00f05dc6b27edad306388a600f6ba0bfff; maxExpArray[114] = 0x00e67a5a25da41063de1495d5b18cdbfff; maxExpArray[115] = 0x00dcff115b14eedde6fc3aa5353f2e4fff; maxExpArray[116] = 0x00d3e7a3924312399f9aae2e0f868f8fff; maxExpArray[117] = 0x00cb2ff529eb71e41582cccd5a1ee26fff; maxExpArray[118] = 0x00c2d415c3db974ab32a51840c0b67edff; maxExpArray[119] = 0x00bad03e7d883f69ad5b0a186184e06bff; maxExpArray[120] = 0x00b320d03b2c343d4829abd6075f0cc5ff; maxExpArray[121] = 0x00abc25204e02828d73c6e80bcdb1a95bf; maxExpArray[122] = 0x00a4b16f74ee4bb2040a1ec6c15fbbf2df; maxExpArray[123] = 0x009deaf736ac1f569deb1b5ae3f36c130f; maxExpArray[124] = 0x00976bd9952c7aa957f5937d790ef65037; maxExpArray[125] = 0x009131271922eaa6064b73a22d0bd4f2bf; maxExpArray[126] = 0x008b380f3558668c46c91c49a2f8e967b9; maxExpArray[127] = 0x00857ddf0117efa215952912839f6473e6; } /** General Description: Determine a value of precision. Calculate an integer approximation of (_baseN / _baseD) ^ (_expN / _expD) * 2 ^ precision. Return the result along with the precision used. Detailed Description: Instead of calculating "base ^ exp", we calculate "e ^ (log(base) * exp)". The value of "log(base)" is represented with an integer slightly smaller than "log(base) * 2 ^ precision". The larger "precision" is, the more accurately this value represents the real value. However, the larger "precision" is, the more bits are required in order to store this value. And the exponentiation function, which takes "x" and calculates "e ^ x", is limited to a maximum exponent (maximum value of "x"). This maximum exponent depends on the "precision" used, and it is given by "maxExpArray[precision] >> (MAX_PRECISION - precision)". Hence we need to determine the highest precision which can be used for the given input, before calling the exponentiation function. This allows us to compute "base ^ exp" with maximum accuracy and without exceeding 256 bits in any of the intermediate computations. This functions assumes that "_expN < 2 ^ 256 / log(MAX_NUM - 1)", otherwise the multiplication should be replaced with a "safeMul". */ function power( uint256 _baseN, uint256 _baseD, uint32 _expN, uint32 _expD ) internal view returns (uint256, uint8) { require(_baseN < MAX_NUM, "baseN exceeds max value."); require(_baseN >= _baseD, "Bases < 1 are not supported."); uint256 baseLog; uint256 base = _baseN * FIXED_1 / _baseD; if (base < OPT_LOG_MAX_VAL) { baseLog = optimalLog(base); } else { baseLog = generalLog(base); } uint256 baseLogTimesExp = baseLog * _expN / _expD; if (baseLogTimesExp < OPT_EXP_MAX_VAL) { return (optimalExp(baseLogTimesExp), MAX_PRECISION); } else { uint8 precision = findPositionInMaxExpArray(baseLogTimesExp); return (generalExp(baseLogTimesExp >> (MAX_PRECISION - precision), precision), precision); } } /** Compute log(x / FIXED_1) * FIXED_1. This functions assumes that "x >= FIXED_1", because the output would be negative otherwise. */ function generalLog(uint256 _x) internal pure returns (uint256) { uint256 res = 0; uint256 x = _x; // If x >= 2, then we compute the integer part of log2(x), which is larger than 0. if (x >= FIXED_2) { uint8 count = floorLog2(x / FIXED_1); x >>= count; // now x < 2 res = count * FIXED_1; } // If x > 1, then we compute the fraction part of log2(x), which is larger than 0. if (x > FIXED_1) { for (uint8 i = MAX_PRECISION; i > 0; --i) { x = (x * x) / FIXED_1; // now 1 < x < 4 if (x >= FIXED_2) { x >>= 1; // now 1 < x < 2 res += ONE << (i - 1); } } } return res * LN2_NUMERATOR / LN2_DENOMINATOR; } /** Compute the largest integer smaller than or equal to the binary logarithm of the input. */ function floorLog2(uint256 _n) internal pure returns (uint8) { uint8 res = 0; uint256 n = _n; if (n < 256) { // At most 8 iterations while (n > 1) { n >>= 1; res += 1; } } else { // Exactly 8 iterations for (uint8 s = 128; s > 0; s >>= 1) { if (n >= (ONE << s)) { n >>= s; res |= s; } } } return res; } /** The global "maxExpArray" is sorted in descending order, and therefore the following statements are equivalent: - This function finds the position of [the smallest value in "maxExpArray" larger than or equal to "x"] - This function finds the highest position of [a value in "maxExpArray" larger than or equal to "x"] */ function findPositionInMaxExpArray(uint256 _x) internal view returns (uint8) { uint8 lo = MIN_PRECISION; uint8 hi = MAX_PRECISION; while (lo + 1 < hi) { uint8 mid = (lo + hi) / 2; if (maxExpArray[mid] >= _x) lo = mid; else hi = mid; } if (maxExpArray[hi] >= _x) return hi; if (maxExpArray[lo] >= _x) return lo; assert(false); return 0; } /* solhint-disable */ /** This function can be auto-generated by the script 'PrintFunctionGeneralExp.py'. It approximates "e ^ x" via maclaurin summation: "(x^0)/0! + (x^1)/1! + ... + (x^n)/n!". It returns "e ^ (x / 2 ^ precision) * 2 ^ precision", that is, the result is upshifted for accuracy. The global "maxExpArray" maps each "precision" to "((maximumExponent + 1) << (MAX_PRECISION - precision)) - 1". The maximum permitted value for "x" is therefore given by "maxExpArray[precision] >> (MAX_PRECISION - precision)". */ function generalExp(uint256 _x, uint8 _precision) internal pure returns (uint256) { uint256 xi = _x; uint256 res = 0; xi = (xi * _x) >> _precision; res += xi * 0x3442c4e6074a82f1797f72ac0000000; // add x^02 * (33! / 02!) xi = (xi * _x) >> _precision; res += xi * 0x116b96f757c380fb287fd0e40000000; // add x^03 * (33! / 03!) xi = (xi * _x) >> _precision; res += xi * 0x045ae5bdd5f0e03eca1ff4390000000; // add x^04 * (33! / 04!) xi = (xi * _x) >> _precision; res += xi * 0x00defabf91302cd95b9ffda50000000; // add x^05 * (33! / 05!) xi = (xi * _x) >> _precision; res += xi * 0x002529ca9832b22439efff9b8000000; // add x^06 * (33! / 06!) xi = (xi * _x) >> _precision; res += xi * 0x00054f1cf12bd04e516b6da88000000; // add x^07 * (33! / 07!) xi = (xi * _x) >> _precision; res += xi * 0x0000a9e39e257a09ca2d6db51000000; // add x^08 * (33! / 08!) xi = (xi * _x) >> _precision; res += xi * 0x000012e066e7b839fa050c309000000; // add x^09 * (33! / 09!) xi = (xi * _x) >> _precision; res += xi * 0x000001e33d7d926c329a1ad1a800000; // add x^10 * (33! / 10!) xi = (xi * _x) >> _precision; res += xi * 0x0000002bee513bdb4a6b19b5f800000; // add x^11 * (33! / 11!) xi = (xi * _x) >> _precision; res += xi * 0x00000003a9316fa79b88eccf2a00000; // add x^12 * (33! / 12!) xi = (xi * _x) >> _precision; res += xi * 0x0000000048177ebe1fa812375200000; // add x^13 * (33! / 13!) xi = (xi * _x) >> _precision; res += xi * 0x0000000005263fe90242dcbacf00000; // add x^14 * (33! / 14!) xi = (xi * _x) >> _precision; res += xi * 0x000000000057e22099c030d94100000; // add x^15 * (33! / 15!) xi = (xi * _x) >> _precision; res += xi * 0x0000000000057e22099c030d9410000; // add x^16 * (33! / 16!) xi = (xi * _x) >> _precision; res += xi * 0x00000000000052b6b54569976310000; // add x^17 * (33! / 17!) xi = (xi * _x) >> _precision; res += xi * 0x00000000000004985f67696bf748000; // add x^18 * (33! / 18!) xi = (xi * _x) >> _precision; res += xi * 0x000000000000003dea12ea99e498000; // add x^19 * (33! / 19!) xi = (xi * _x) >> _precision; res += xi * 0x00000000000000031880f2214b6e000; // add x^20 * (33! / 20!) xi = (xi * _x) >> _precision; res += xi * 0x000000000000000025bcff56eb36000; // add x^21 * (33! / 21!) xi = (xi * _x) >> _precision; res += xi * 0x000000000000000001b722e10ab1000; // add x^22 * (33! / 22!) xi = (xi * _x) >> _precision; res += xi * 0x0000000000000000001317c70077000; // add x^23 * (33! / 23!) xi = (xi * _x) >> _precision; res += xi * 0x00000000000000000000cba84aafa00; // add x^24 * (33! / 24!) xi = (xi * _x) >> _precision; res += xi * 0x00000000000000000000082573a0a00; // add x^25 * (33! / 25!) xi = (xi * _x) >> _precision; res += xi * 0x00000000000000000000005035ad900; // add x^26 * (33! / 26!) xi = (xi * _x) >> _precision; res += xi * 0x000000000000000000000002f881b00; // add x^27 * (33! / 27!) xi = (xi * _x) >> _precision; res += xi * 0x0000000000000000000000001b29340; // add x^28 * (33! / 28!) xi = (xi * _x) >> _precision; res += xi * 0x00000000000000000000000000efc40; // add x^29 * (33! / 29!) xi = (xi * _x) >> _precision; res += xi * 0x0000000000000000000000000007fe0; // add x^30 * (33! / 30!) xi = (xi * _x) >> _precision; res += xi * 0x0000000000000000000000000000420; // add x^31 * (33! / 31!) xi = (xi * _x) >> _precision; res += xi * 0x0000000000000000000000000000021; // add x^32 * (33! / 32!) xi = (xi * _x) >> _precision; res += xi * 0x0000000000000000000000000000001; // add x^33 * (33! / 33!) return res / 0x688589cc0e9505e2f2fee5580000000 + _x + (ONE << _precision); // divide by 33! and then add x^1 / 1! + x^0 / 0! } /** Return log(x / FIXED_1) * FIXED_1 Input range: FIXED_1 <= x <= LOG_EXP_MAX_VAL - 1 Auto-generated via 'PrintFunctionOptimalLog.py' */ function optimalLog(uint256 x) internal pure returns (uint256) { uint256 res = 0; uint256 y; uint256 z; uint256 w; if (x >= 0xd3094c70f034de4b96ff7d5b6f99fcd8) {res += 0x40000000000000000000000000000000; x = x * FIXED_1 / 0xd3094c70f034de4b96ff7d5b6f99fcd8;} if (x >= 0xa45af1e1f40c333b3de1db4dd55f29a7) {res += 0x20000000000000000000000000000000; x = x * FIXED_1 / 0xa45af1e1f40c333b3de1db4dd55f29a7;} if (x >= 0x910b022db7ae67ce76b441c27035c6a1) {res += 0x10000000000000000000000000000000; x = x * FIXED_1 / 0x910b022db7ae67ce76b441c27035c6a1;} if (x >= 0x88415abbe9a76bead8d00cf112e4d4a8) {res += 0x08000000000000000000000000000000; x = x * FIXED_1 / 0x88415abbe9a76bead8d00cf112e4d4a8;} if (x >= 0x84102b00893f64c705e841d5d4064bd3) {res += 0x04000000000000000000000000000000; x = x * FIXED_1 / 0x84102b00893f64c705e841d5d4064bd3;} if (x >= 0x8204055aaef1c8bd5c3259f4822735a2) {res += 0x02000000000000000000000000000000; x = x * FIXED_1 / 0x8204055aaef1c8bd5c3259f4822735a2;} if (x >= 0x810100ab00222d861931c15e39b44e99) {res += 0x01000000000000000000000000000000; x = x * FIXED_1 / 0x810100ab00222d861931c15e39b44e99;} if (x >= 0x808040155aabbbe9451521693554f733) {res += 0x00800000000000000000000000000000; x = x * FIXED_1 / 0x808040155aabbbe9451521693554f733;} z = y = x - FIXED_1; w = y * y / FIXED_1; res += z * (0x100000000000000000000000000000000 - y) / 0x100000000000000000000000000000000; z = z * w / FIXED_1; res += z * (0x0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa - y) / 0x200000000000000000000000000000000; z = z * w / FIXED_1; res += z * (0x099999999999999999999999999999999 - y) / 0x300000000000000000000000000000000; z = z * w / FIXED_1; res += z * (0x092492492492492492492492492492492 - y) / 0x400000000000000000000000000000000; z = z * w / FIXED_1; res += z * (0x08e38e38e38e38e38e38e38e38e38e38e - y) / 0x500000000000000000000000000000000; z = z * w / FIXED_1; res += z * (0x08ba2e8ba2e8ba2e8ba2e8ba2e8ba2e8b - y) / 0x600000000000000000000000000000000; z = z * w / FIXED_1; res += z * (0x089d89d89d89d89d89d89d89d89d89d89 - y) / 0x700000000000000000000000000000000; z = z * w / FIXED_1; res += z * (0x088888888888888888888888888888888 - y) / 0x800000000000000000000000000000000; return res; } /** Return e ^ (x / FIXED_1) * FIXED_1 Input range: 0 <= x <= OPT_EXP_MAX_VAL - 1 Auto-generated via 'PrintFunctionOptimalExp.py' */ function optimalExp(uint256 x) internal pure returns (uint256) { uint256 res = 0; uint256 y; uint256 z; z = y = x % 0x10000000000000000000000000000000; z = z * y / FIXED_1; res += z * 0x10e1b3be415a0000; // add y^02 * (20! / 02!) z = z * y / FIXED_1; res += z * 0x05a0913f6b1e0000; // add y^03 * (20! / 03!) z = z * y / FIXED_1; res += z * 0x0168244fdac78000; // add y^04 * (20! / 04!) z = z * y / FIXED_1; res += z * 0x004807432bc18000; // add y^05 * (20! / 05!) z = z * y / FIXED_1; res += z * 0x000c0135dca04000; // add y^06 * (20! / 06!) z = z * y / FIXED_1; res += z * 0x0001b707b1cdc000; // add y^07 * (20! / 07!) z = z * y / FIXED_1; res += z * 0x000036e0f639b800; // add y^08 * (20! / 08!) z = z * y / FIXED_1; res += z * 0x00000618fee9f800; // add y^09 * (20! / 09!) z = z * y / FIXED_1; res += z * 0x0000009c197dcc00; // add y^10 * (20! / 10!) z = z * y / FIXED_1; res += z * 0x0000000e30dce400; // add y^11 * (20! / 11!) z = z * y / FIXED_1; res += z * 0x000000012ebd1300; // add y^12 * (20! / 12!) z = z * y / FIXED_1; res += z * 0x0000000017499f00; // add y^13 * (20! / 13!) z = z * y / FIXED_1; res += z * 0x0000000001a9d480; // add y^14 * (20! / 14!) z = z * y / FIXED_1; res += z * 0x00000000001c6380; // add y^15 * (20! / 15!) z = z * y / FIXED_1; res += z * 0x000000000001c638; // add y^16 * (20! / 16!) z = z * y / FIXED_1; res += z * 0x0000000000001ab8; // add y^17 * (20! / 17!) z = z * y / FIXED_1; res += z * 0x000000000000017c; // add y^18 * (20! / 18!) z = z * y / FIXED_1; res += z * 0x0000000000000014; // add y^19 * (20! / 19!) z = z * y / FIXED_1; res += z * 0x0000000000000001; // add y^20 * (20! / 20!) res = res / 0x21c3677c82b40000 + y + FIXED_1; // divide by 20! and then add y^1 / 1! + y^0 / 0! if ((x & 0x010000000000000000000000000000000) != 0) res = res * 0x1c3d6a24ed82218787d624d3e5eba95f9 / 0x18ebef9eac820ae8682b9793ac6d1e776; if ((x & 0x020000000000000000000000000000000) != 0) res = res * 0x18ebef9eac820ae8682b9793ac6d1e778 / 0x1368b2fc6f9609fe7aceb46aa619baed4; if ((x & 0x040000000000000000000000000000000) != 0) res = res * 0x1368b2fc6f9609fe7aceb46aa619baed5 / 0x0bc5ab1b16779be3575bd8f0520a9f21f; if ((x & 0x080000000000000000000000000000000) != 0) res = res * 0x0bc5ab1b16779be3575bd8f0520a9f21e / 0x0454aaa8efe072e7f6ddbab84b40a55c9; if ((x & 0x100000000000000000000000000000000) != 0) res = res * 0x0454aaa8efe072e7f6ddbab84b40a55c5 / 0x00960aadc109e7a3bf4578099615711ea; if ((x & 0x200000000000000000000000000000000) != 0) res = res * 0x00960aadc109e7a3bf4578099615711d7 / 0x0002bf84208204f5977f9a8cf01fdce3d; if ((x & 0x400000000000000000000000000000000) != 0) res = res * 0x0002bf84208204f5977f9a8cf01fdc307 / 0x0000003c6ab775dd0b95b4cbee7e65d11; return res; } /* solhint-enable */ } library SafeMath { /** * @dev Multiplies two numbers, reverts on overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b); return c; } /** * @dev Integer division of two numbers truncating the quotient, reverts on division by zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { require(b > 0); // Solidity only automatically asserts when dividing by 0 uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Subtracts two numbers, reverts on overflow (i.e. if subtrahend is greater than minuend). */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { require(b <= a); uint256 c = a - b; return c; } /** * @dev Adds two numbers, reverts on overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a); return c; } /** * @dev Divides two numbers and returns the remainder (unsigned integer modulo), * reverts when dividing by zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { require(b != 0); return a % b; } } contract BancorFormula is Power { using SafeMath for uint256; uint32 private constant MAX_RESERVE_RATIO = 1000000; /** * @dev given a continuous token supply, reserve token balance, reserve ratio, and a deposit amount (in the reserve token), * calculates the return for a given conversion (in the continuous token) * * Formula: * Return = _supply * ((1 + _depositAmount / _reserveBalance) ^ (_reserveRatio / MAX_RESERVE_RATIO) - 1) * * @param _supply continuous token total supply * @param _reserveBalance total reserve token balance * @param _reserveRatio reserve ratio, represented in ppm, 1-1000000 * @param _depositAmount deposit amount, in reserve token * * @return purchase return amount */ function calculatePurchaseReturn( uint256 _supply, uint256 _reserveBalance, uint32 _reserveRatio, uint256 _depositAmount) public view returns (uint256) { // validate input require(_supply > 0 && _reserveBalance > 0 && _reserveRatio > 0 && _reserveRatio <= MAX_RESERVE_RATIO, "Invalid inputs."); // special case for 0 deposit amount if (_depositAmount == 0) { return 0; } // special case if the ratio = 100% if (_reserveRatio == MAX_RESERVE_RATIO) { return _supply.mul(_depositAmount).div(_reserveBalance); } uint256 result; uint8 precision; uint256 baseN = _depositAmount.add(_reserveBalance); (result, precision) = power( baseN, _reserveBalance, _reserveRatio, MAX_RESERVE_RATIO ); uint256 newTokenSupply = _supply.mul(result) >> precision; return newTokenSupply.sub(_supply); } /** * @dev given a continuous token supply, reserve token balance, reserve ratio and a sell amount (in the continuous token), * calculates the return for a given conversion (in the reserve token) * * Formula: * Return = _reserveBalance * (1 - (1 - _sellAmount / _supply) ^ (1 / (_reserveRatio / MAX_RESERVE_RATIO))) * * @param _supply continuous token total supply * @param _reserveBalance total reserve token balance * @param _reserveRatio constant reserve ratio, represented in ppm, 1-1000000 * @param _sellAmount sell amount, in the continuous token itself * * @return sale return amount */ function calculateSaleReturn( uint256 _supply, uint256 _reserveBalance, uint32 _reserveRatio, uint256 _sellAmount) public view returns (uint256) { // validate input require(_supply > 0 && _reserveBalance > 0 && _reserveRatio > 0 && _reserveRatio <= MAX_RESERVE_RATIO && _sellAmount <= _supply, "Invalid inputs."); // special case for 0 sell amount if (_sellAmount == 0) { return 0; } // special case for selling the entire supply if (_sellAmount == _supply) { return _reserveBalance; } // special case if the ratio = 100% if (_reserveRatio == MAX_RESERVE_RATIO) { return _reserveBalance.mul(_sellAmount).div(_supply); } uint256 result; uint8 precision; uint256 baseD = _supply.sub(_sellAmount); (result, precision) = power( _supply, baseD, MAX_RESERVE_RATIO, _reserveRatio ); uint256 oldBalance = _reserveBalance.mul(result); uint256 newBalance = _reserveBalance << precision; return oldBalance.sub(newBalance).div(result); } } contract ERC20 is IERC20 { using SafeMath for uint256; mapping (address => uint256) private _balances; mapping (address => mapping (address => uint256)) private _allowed; uint256 private _totalSupply; /** * @dev Total number of tokens in existence */ function totalSupply() public view returns (uint256) { return _totalSupply; } /** * @dev Gets the balance of the specified address. * @param owner The address to query the balance of. * @return An uint256 representing the amount owned by the passed address. */ function balanceOf(address owner) public view returns (uint256) { return _balances[owner]; } /** * @dev Function to check the amount of tokens that an owner allowed to a spender. * @param owner address The address which owns the funds. * @param spender address The address which will spend the funds. * @return A uint256 specifying the amount of tokens still available for the spender. */ function allowance( address owner, address spender ) public view returns (uint256) { return _allowed[owner][spender]; } /** * @dev Transfer token for a specified address * @param to The address to transfer to. * @param value The amount to be transferred. */ function transfer(address to, uint256 value) public returns (bool) { _transfer(msg.sender, to, value); return true; } /** * @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender. * Beware that changing an allowance with this method brings the risk that someone may use both the old * and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this * race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * @param spender The address which will spend the funds. * @param value The amount of tokens to be spent. */ function approve(address spender, uint256 value) public returns (bool) { require(spender != address(0)); _allowed[msg.sender][spender] = value; emit Approval(msg.sender, spender, value); return true; } /** * @dev Transfer tokens from one address to another * @param from address The address which you want to send tokens from * @param to address The address which you want to transfer to * @param value uint256 the amount of tokens to be transferred */ function transferFrom( address from, address to, uint256 value ) public returns (bool) { require(value <= _allowed[from][msg.sender]); _allowed[from][msg.sender] = _allowed[from][msg.sender].sub(value); _transfer(from, to, value); return true; } /** * @dev Increase the amount of tokens that an owner allowed to a spender. * approve should be called when allowed_[_spender] == 0. To increment * allowed value is better to use this function to avoid 2 calls (and wait until * the first transaction is mined) * From MonolithDAO Token.sol * @param spender The address which will spend the funds. * @param addedValue The amount of tokens to increase the allowance by. */ function increaseAllowance( address spender, uint256 addedValue ) public returns (bool) { require(spender != address(0)); _allowed[msg.sender][spender] = ( _allowed[msg.sender][spender].add(addedValue)); emit Approval(msg.sender, spender, _allowed[msg.sender][spender]); return true; } /** * @dev Decrease the amount of tokens that an owner allowed to a spender. * approve should be called when allowed_[_spender] == 0. To decrement * allowed value is better to use this function to avoid 2 calls (and wait until * the first transaction is mined) * From MonolithDAO Token.sol * @param spender The address which will spend the funds. * @param subtractedValue The amount of tokens to decrease the allowance by. */ function decreaseAllowance( address spender, uint256 subtractedValue ) public returns (bool) { require(spender != address(0)); _allowed[msg.sender][spender] = ( _allowed[msg.sender][spender].sub(subtractedValue)); emit Approval(msg.sender, spender, _allowed[msg.sender][spender]); return true; } /** * @dev Transfer token for a specified addresses * @param from The address to transfer from. * @param to The address to transfer to. * @param value The amount to be transferred. */ function _transfer(address from, address to, uint256 value) internal { require(value <= _balances[from]); require(to != address(0)); _balances[from] = _balances[from].sub(value); _balances[to] = _balances[to].add(value); emit Transfer(from, to, value); } /** * @dev Internal function that mints an amount of the token and assigns it to * an account. This encapsulates the modification of balances such that the * proper events are emitted. * @param account The account that will receive the created tokens. * @param value The amount that will be created. */ function _mint(address account, uint256 value) internal { require(account != 0); _totalSupply = _totalSupply.add(value); _balances[account] = _balances[account].add(value); emit Transfer(address(0), account, value); } /** * @dev Internal function that burns an amount of the token of a given * account. * @param account The account whose tokens will be burnt. * @param value The amount that will be burnt. */ function _burn(address account, uint256 value) internal { require(account != 0); require(value <= _balances[account]); _totalSupply = _totalSupply.sub(value); _balances[account] = _balances[account].sub(value); emit Transfer(account, address(0), value); } /** * @dev Internal function that burns an amount of the token of a given * account, deducting from the sender's allowance for said account. Uses the * internal burn function. * @param account The account whose tokens will be burnt. * @param value The amount that will be burnt. */ function _burnFrom(address account, uint256 value) internal { require(value <= _allowed[account][msg.sender]); // Should https://github.com/OpenZeppelin/zeppelin-solidity/issues/707 be accepted, // this function needs to emit an event with the updated approval. _allowed[account][msg.sender] = _allowed[account][msg.sender].sub( value); _burn(account, value); } } contract ERC20Detailed is IERC20 { string private _name; string private _symbol; uint8 private _decimals; constructor(string name, string symbol, uint8 decimals) public { _name = name; _symbol = symbol; _decimals = decimals; } /** * @return the name of the token. */ function name() public view returns(string) { return _name; } /** * @return the symbol of the token. */ function symbol() public view returns(string) { return _symbol; } /** * @return the number of decimals of the token. */ function decimals() public view returns(uint8) { return _decimals; } } contract TestERC20 is ERC20Detailed, ERC20 { constructor( string _name, string _symbol, uint8 _decimals, uint _initialSupply ) public ERC20Detailed(_name, _symbol, _decimals) { _mint(msg.sender, _initialSupply); } } contract BancorBondingCurve is IBondingCurve, BancorFormula { /* reserve ratio, represented in ppm, 1-1000000 1/3 corresponds to y= multiple * x^2 1/2 corresponds to y= multiple * x 2/3 corresponds to y= multiple * x^1/2 */ uint32 public reserveRatio; constructor(uint32 _reserveRatio) public { reserveRatio = _reserveRatio; } function getContinuousMintReward(uint _reserveTokenAmount) public view returns (uint) { return calculatePurchaseReturn(continuousSupply(), reserveBalance(), reserveRatio, _reserveTokenAmount); } function getContinuousBurnRefund(uint _continuousTokenAmount) public view returns (uint) { return calculateSaleReturn(continuousSupply(), reserveBalance(), reserveRatio, _continuousTokenAmount); } /** * @dev Abstract method that returns continuous token supply */ function continuousSupply() public view returns (uint); /** * @dev Abstract method that returns reserve token balance */ function reserveBalance() public view returns (uint); } contract ContinuousToken is Ownable, ERC20, ERC20Detailed, BancorBondingCurve { using SafeMath for uint; event Minted(address sender, uint amount, uint deposit); event Burned(address sender, uint amount, uint refund); constructor( string _name, string _symbol, uint8 _decimals, uint _initialSupply, uint32 _reserveRatio ) public ERC20Detailed(_name, _symbol, _decimals) BancorBondingCurve(_reserveRatio) { _mint(msg.sender, _initialSupply); } function continuousSupply() public view returns (uint) { return totalSupply(); // Continuous Token total supply } function _continuousMint(uint _deposit, uint _minReward) internal returns (uint) { require(_deposit > 0, "Deposit must be non-zero."); uint rewardAmount = getContinuousMintReward(_deposit); require(rewardAmount >= _minReward); _mint(msg.sender, rewardAmount); emit Minted(msg.sender, rewardAmount, _deposit); return rewardAmount; } function _continuousBurn(uint _amount, uint _minRefund) internal returns (uint) { require(_amount > 0, "Amount must be non-zero."); require(balanceOf(msg.sender) >= _amount, "Insufficient tokens to burn."); uint refundAmount = getContinuousBurnRefund(_amount); require(refundAmount >= _minRefund); _burn(msg.sender, _amount); emit Burned(msg.sender, _amount, refundAmount); return refundAmount; } } contract ERC20ContinuousToken is ContinuousToken { ERC20 public reserveToken; constructor( string _name, string _symbol, uint8 _decimals, uint _initialSupply, uint32 _reserveRatio, address _reserveTokenAddress ) public ContinuousToken(_name, _symbol, _decimals, _initialSupply, _reserveRatio) { reserveToken = ERC20(_reserveTokenAddress); } function () public { revert("Cannot call fallback function."); } function mint(uint _amount, uint _minReceived) public { _continuousMint(_amount, _minReceived); require(reserveToken.transferFrom(msg.sender, address(this), _amount), "mint() ERC20.transferFrom failed."); } function burn(uint _amount, uint _minReceived) public { uint returnAmount = _continuousBurn(_amount, _minReceived); require(reserveToken.transfer(msg.sender, returnAmount), "burn() ERC20.transfer failed."); } function reserveBalance() public view returns (uint) { return reserveToken.balanceOf(address(this)); } }

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{"success": true, "error": null, "results": {"detectors": [{"check": "divide-before-multiply", "impact": "Medium", "confidence": "Medium"}, {"check": "incorrect-equality", "impact": "Medium", "confidence": "High"}, {"check": "uninitialized-local", "impact": "Medium", "confidence": "Medium"}]}}

0x67cceeb02553e3277c16fd3cee586a714f4f7042

pragma solidity 0.6.6; abstract contract Context { function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } interface IUniswapV2Pair { function totalSupply() external view returns (uint); function transferFrom(address sender, address recipient, uint amount) external returns (bool); function transfer(address recipient, uint amount) external returns (bool); function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast); } contract RPEPELPURPLE is Context { using SafeMath for uint256; // Contract state variables address private _UniswapV2Pair; uint256 private _totalStakedAmount; mapping(address => uint256) private _stakedAmount; address[] private _stakers; // Events event Staked(address account, uint256 amount); event Unstaked(address account, uint256 amount); constructor(address UniswapV2Pair) public { _UniswapV2Pair = UniswapV2Pair; } /** * @dev Stake rPEPE-ETH LP tokens * * Requirement * * - In this pool, don't care about 2.5% fee for stake/unstake * * @param amount: Amount of LP tokens to deposit */ function stake(uint256 amount) public { require(amount > 0, "Staking amount must be more than zero"); // Transfer tokens from staker to the contract amount require(IUniswapV2Pair(_UniswapV2Pair).transferFrom(_msgSender(), address(this), uint(amount)), "It has failed to transfer tokens from staker to contract."); // add staker to array if (_stakedAmount[_msgSender()] == 0) { _stakers.push(_msgSender()); } // Increase the total staked amount _totalStakedAmount = _totalStakedAmount.add(amount); // Add new stake amount _stakedAmount[_msgSender()] = _stakedAmount[_msgSender()].add(amount); emit Staked(_msgSender(), amount); } /** * @dev Unstake staked rPEPE-ETH LP tokens * * Requirement * * - In this pool, don't care about 2.5% fee for stake/unstake * * @param amount: Amount of LP tokens to unstake */ function unstake(uint256 amount) public { // Transfer tokens from contract amount to staker require(IUniswapV2Pair(_UniswapV2Pair).transfer(_msgSender(), uint(amount)), "It has failed to transfer tokens from contract to staker."); // Decrease the total staked amount _totalStakedAmount = _totalStakedAmount.sub(amount); // Decrease the staker's amount _stakedAmount[_msgSender()] = _stakedAmount[_msgSender()].sub(amount); // remove staker from array if (_stakedAmount[_msgSender()] == 0) { for (uint256 i=0; i < _stakers.length; i++) { if (_stakers[i] == _msgSender()) { _stakers[i] = _stakers[_stakers.length.sub(1)]; _stakers.pop(); break; } } } emit Unstaked(_msgSender(), amount); } /** * @dev API to get the total staked LP amount of all stakers */ function getTotalStakedLPAmount() external view returns (uint256) { return _totalStakedAmount; } /** * @dev API to get the staker's staked LP amount */ function getStakedLPAmount(address account) external view returns (uint256) { return _stakedAmount[account]; } /** * @dev API to get the total staked rPEPE amount of all stakers */ function getTotalStakedAmount() external view returns (uint256) { return _getStakedPepeAmount(_totalStakedAmount); } /** * @dev API to get the staker's staked rPEPE amount */ function getStakedAmount(address account) external view returns (uint256) { return _getStakedPepeAmount(_stakedAmount[account]); } /** * @dev API to get the staker's array */ function getStakers() external view returns (address[] memory) { return _stakers; } /** * @dev count and return pepe amount from lp token amount in uniswap v2 pool * * Formula * * - rPEPE = (staked LP / total LP in uniswap pool) * rPEPE in uniswap pool */ function _getStakedPepeAmount(uint256 amount) internal view returns (uint256) { (uint112 pepeAmount,,) = IUniswapV2Pair(_UniswapV2Pair).getReserves(); // get the total amount of LP token in uniswap v2 pool uint totalAmount = IUniswapV2Pair(_UniswapV2Pair).totalSupply(); return amount.mul(uint256(pepeAmount)).div(uint256(totalAmount)); } } library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } function ceil(uint256 a, uint256 m) internal pure returns (uint256) { uint256 c = add(a, m); uint256 d = sub(c, 1); return mul(div(d,m),m); } }

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0x67fd74a9ade64de151e0c2e1bc8badbe2bae4706

pragma solidity 0.4.21; contract EIP20Interface { /* This is a slight change to the ERC20 base standard. function totalSupply() constant returns (uint256 supply); is replaced with: uint256 public totalSupply; This automatically creates a getter function for the totalSupply. This is moved to the base contract since public getter functions are not currently recognised as an implementation of the matching abstract function by the compiler. */ /// total amount of tokens uint256 public totalSupply; /// @param _owner The address from which the balance will be retrieved /// @return The balance function balanceOf(address _owner) public view returns (uint256 balance); /// @notice send `_value` token to `_to` from `msg.sender` /// @param _to The address of the recipient /// @param _value The amount of token to be transferred /// @return Whether the transfer was successful or not function transfer(address _to, uint256 _value) public returns (bool success); /// @notice send `_value` token to `_to` from `_from` on the condition it is approved by `_from` /// @param _from The address of the sender /// @param _to The address of the recipient /// @param _value The amount of token to be transferred /// @return Whether the transfer was successful or not function transferFrom(address _from, address _to, uint256 _value) public returns (bool success); /// @notice `msg.sender` approves `_spender` to spend `_value` tokens /// @param _spender The address of the account able to transfer the tokens /// @param _value The amount of tokens to be approved for transfer /// @return Whether the approval was successful or not function approve(address _spender, uint256 _value) public returns (bool success); /// @param _owner The address of the account owning tokens /// @param _spender The address of the account able to transfer the tokens /// @return Amount of remaining tokens allowed to spent function allowance(address _owner, address _spender) public view returns (uint256 remaining); // solhint-disable-next-line no-simple-event-func-name event Transfer(address indexed _from, address indexed _to, uint256 _value); event Approval(address indexed _owner, address indexed _spender, uint256 _value); } contract jane is EIP20Interface { uint256 constant private MAX_UINT256 = 2**256 - 1; mapping (address => uint256) public balances; mapping (address => mapping (address => uint256)) public allowed; /* NOTE: The following variables are OPTIONAL vanities. One does not have to include them. They allow one to customise the token contract & in no way influences the core functionality. Some wallets/interfaces might not even bother to look at this information. */ string public name; //fancy name: eg Simon Bucks uint8 public decimals; //How many decimals to show. string public symbol; //An identifier: eg SBX function jane( uint256 _initialAmount, string _tokenName, uint8 _decimalUnits, string _tokenSymbol ) public { balances[msg.sender] = _initialAmount; // Give the creator all initial tokens totalSupply = _initialAmount; // Update total supply name = _tokenName; // Set the name for display purposes decimals = _decimalUnits; // Amount of decimals for display purposes symbol = _tokenSymbol; // Set the symbol for display purposes } function transfer(address _to, uint256 _value) public returns (bool success) { require(balances[msg.sender] >= _value); balances[msg.sender] -= _value; balances[_to] += _value; emit Transfer(msg.sender, _to, _value); //solhint-disable-line indent, no-unused-vars return true; } function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) { uint256 allowance = allowed[_from][msg.sender]; require(balances[_from] >= _value && allowance >= _value); balances[_to] += _value; balances[_from] -= _value; if (allowance < MAX_UINT256) { allowed[_from][msg.sender] -= _value; } emit Transfer(_from, _to, _value); //solhint-disable-line indent, no-unused-vars return true; } function balanceOf(address _owner) public view returns (uint256 balance) { return balances[_owner]; } function approve(address _spender, uint256 _value) public returns (bool success) { allowed[msg.sender][_spender] = _value; emit Approval(msg.sender, _spender, _value); //solhint-disable-line indent, no-unused-vars return true; } function allowance(address _owner, address _spender) public view returns (uint256 remaining) { return allowed[_owner][_spender]; } }

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0x681192ae9d24643ef2f61dae48325e20f451b862

pragma solidity 0.6.10; pragma experimental ABIEncoderV2; library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // According to EIP-1052, 0x0 is the value returned for not-yet created accounts // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned // for accounts without code, i.e. `keccak256('')` bytes32 codehash; bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470; // solhint-disable-next-line no-inline-assembly assembly { codehash := extcodehash(account) } return (codehash != accountHash && codehash != 0x0); } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } } library BokkyPooBahsDateTimeLibrary { uint constant SECONDS_PER_DAY = 24 * 60 * 60; uint constant SECONDS_PER_HOUR = 60 * 60; uint constant SECONDS_PER_MINUTE = 60; int constant OFFSET19700101 = 2440588; uint constant DOW_MON = 1; uint constant DOW_TUE = 2; uint constant DOW_WED = 3; uint constant DOW_THU = 4; uint constant DOW_FRI = 5; uint constant DOW_SAT = 6; uint constant DOW_SUN = 7; // ------------------------------------------------------------------------ // Calculate the number of days from 1970/01/01 to year/month/day using // the date conversion algorithm from // http://aa.usno.navy.mil/faq/docs/JD_Formula.php // and subtracting the offset 2440588 so that 1970/01/01 is day 0 // // days = day // - 32075 // + 1461 * (year + 4800 + (month - 14) / 12) / 4 // + 367 * (month - 2 - (month - 14) / 12 * 12) / 12 // - 3 * ((year + 4900 + (month - 14) / 12) / 100) / 4 // - offset // ------------------------------------------------------------------------ function _daysFromDate(uint year, uint month, uint day) internal pure returns (uint _days) { require(year >= 1970); int _year = int(year); int _month = int(month); int _day = int(day); int __days = _day - 32075 + 1461 * (_year + 4800 + (_month - 14) / 12) / 4 + 367 * (_month - 2 - (_month - 14) / 12 * 12) / 12 - 3 * ((_year + 4900 + (_month - 14) / 12) / 100) / 4 - OFFSET19700101; _days = uint(__days); } // ------------------------------------------------------------------------ // Calculate year/month/day from the number of days since 1970/01/01 using // the date conversion algorithm from // http://aa.usno.navy.mil/faq/docs/JD_Formula.php // and adding the offset 2440588 so that 1970/01/01 is day 0 // // int L = days + 68569 + offset // int N = 4 * L / 146097 // L = L - (146097 * N + 3) / 4 // year = 4000 * (L + 1) / 1461001 // L = L - 1461 * year / 4 + 31 // month = 80 * L / 2447 // dd = L - 2447 * month / 80 // L = month / 11 // month = month + 2 - 12 * L // year = 100 * (N - 49) + year + L // ------------------------------------------------------------------------ function _daysToDate(uint _days) internal pure returns (uint year, uint month, uint day) { int __days = int(_days); int L = __days + 68569 + OFFSET19700101; int N = 4 * L / 146097; L = L - (146097 * N + 3) / 4; int _year = 4000 * (L + 1) / 1461001; L = L - 1461 * _year / 4 + 31; int _month = 80 * L / 2447; int _day = L - 2447 * _month / 80; L = _month / 11; _month = _month + 2 - 12 * L; _year = 100 * (N - 49) + _year + L; year = uint(_year); month = uint(_month); day = uint(_day); } function timestampFromDate(uint year, uint month, uint day) internal pure returns (uint timestamp) { timestamp = _daysFromDate(year, month, day) * SECONDS_PER_DAY; } function timestampFromDateTime(uint year, uint month, uint day, uint hour, uint minute, uint second) internal pure returns (uint timestamp) { timestamp = _daysFromDate(year, month, day) * SECONDS_PER_DAY + hour * SECONDS_PER_HOUR + minute * SECONDS_PER_MINUTE + second; } function timestampToDate(uint timestamp) internal pure returns (uint year, uint month, uint day) { (year, month, day) = _daysToDate(timestamp / SECONDS_PER_DAY); } function timestampToDateTime(uint timestamp) internal pure returns (uint year, uint month, uint day, uint hour, uint minute, uint second) { (year, month, day) = _daysToDate(timestamp / SECONDS_PER_DAY); uint secs = timestamp % SECONDS_PER_DAY; hour = secs / SECONDS_PER_HOUR; secs = secs % SECONDS_PER_HOUR; minute = secs / SECONDS_PER_MINUTE; second = secs % SECONDS_PER_MINUTE; } function isValidDate(uint year, uint month, uint day) internal pure returns (bool valid) { if (year >= 1970 && month > 0 && month <= 12) { uint daysInMonth = _getDaysInMonth(year, month); if (day > 0 && day <= daysInMonth) { valid = true; } } } function isValidDateTime(uint year, uint month, uint day, uint hour, uint minute, uint second) internal pure returns (bool valid) { if (isValidDate(year, month, day)) { if (hour < 24 && minute < 60 && second < 60) { valid = true; } } } function isLeapYear(uint timestamp) internal pure returns (bool leapYear) { uint year; uint month; uint day; (year, month, day) = _daysToDate(timestamp / SECONDS_PER_DAY); leapYear = _isLeapYear(year); } function _isLeapYear(uint year) internal pure returns (bool leapYear) { leapYear = ((year % 4 == 0) && (year % 100 != 0)) || (year % 400 == 0); } function isWeekDay(uint timestamp) internal pure returns (bool weekDay) { weekDay = getDayOfWeek(timestamp) <= DOW_FRI; } function isWeekEnd(uint timestamp) internal pure returns (bool weekEnd) { weekEnd = getDayOfWeek(timestamp) >= DOW_SAT; } function getDaysInMonth(uint timestamp) internal pure returns (uint daysInMonth) { uint year; uint month; uint day; (year, month, day) = _daysToDate(timestamp / SECONDS_PER_DAY); daysInMonth = _getDaysInMonth(year, month); } function _getDaysInMonth(uint year, uint month) internal pure returns (uint daysInMonth) { if (month == 1 || month == 3 || month == 5 || month == 7 || month == 8 || month == 10 || month == 12) { daysInMonth = 31; } else if (month != 2) { daysInMonth = 30; } else { daysInMonth = _isLeapYear(year) ? 29 : 28; } } // 1 = Monday, 7 = Sunday function getDayOfWeek(uint timestamp) internal pure returns (uint dayOfWeek) { uint _days = timestamp / SECONDS_PER_DAY; dayOfWeek = (_days + 3) % 7 + 1; } function getYear(uint timestamp) internal pure returns (uint year) { uint month; uint day; (year, month, day) = _daysToDate(timestamp / SECONDS_PER_DAY); } function getMonth(uint timestamp) internal pure returns (uint month) { uint year; uint day; (year, month, day) = _daysToDate(timestamp / SECONDS_PER_DAY); } function getDay(uint timestamp) internal pure returns (uint day) { uint year; uint month; (year, month, day) = _daysToDate(timestamp / SECONDS_PER_DAY); } function getHour(uint timestamp) internal pure returns (uint hour) { uint secs = timestamp % SECONDS_PER_DAY; hour = secs / SECONDS_PER_HOUR; } function getMinute(uint timestamp) internal pure returns (uint minute) { uint secs = timestamp % SECONDS_PER_HOUR; minute = secs / SECONDS_PER_MINUTE; } function getSecond(uint timestamp) internal pure returns (uint second) { second = timestamp % SECONDS_PER_MINUTE; } function addYears(uint timestamp, uint _years) internal pure returns (uint newTimestamp) { uint year; uint month; uint day; (year, month, day) = _daysToDate(timestamp / SECONDS_PER_DAY); year += _years; uint daysInMonth = _getDaysInMonth(year, month); if (day > daysInMonth) { day = daysInMonth; } newTimestamp = _daysFromDate(year, month, day) * SECONDS_PER_DAY + timestamp % SECONDS_PER_DAY; require(newTimestamp >= timestamp); } function addMonths(uint timestamp, uint _months) internal pure returns (uint newTimestamp) { uint year; uint month; uint day; (year, month, day) = _daysToDate(timestamp / SECONDS_PER_DAY); month += _months; year += (month - 1) / 12; month = (month - 1) % 12 + 1; uint daysInMonth = _getDaysInMonth(year, month); if (day > daysInMonth) { day = daysInMonth; } newTimestamp = _daysFromDate(year, month, day) * SECONDS_PER_DAY + timestamp % SECONDS_PER_DAY; require(newTimestamp >= timestamp); } function addDays(uint timestamp, uint _days) internal pure returns (uint newTimestamp) { newTimestamp = timestamp + _days * SECONDS_PER_DAY; require(newTimestamp >= timestamp); } function addHours(uint timestamp, uint _hours) internal pure returns (uint newTimestamp) { newTimestamp = timestamp + _hours * SECONDS_PER_HOUR; require(newTimestamp >= timestamp); } function addMinutes(uint timestamp, uint _minutes) internal pure returns (uint newTimestamp) { newTimestamp = timestamp + _minutes * SECONDS_PER_MINUTE; require(newTimestamp >= timestamp); } function addSeconds(uint timestamp, uint _seconds) internal pure returns (uint newTimestamp) { newTimestamp = timestamp + _seconds; require(newTimestamp >= timestamp); } function subYears(uint timestamp, uint _years) internal pure returns (uint newTimestamp) { uint year; uint month; uint day; (year, month, day) = _daysToDate(timestamp / SECONDS_PER_DAY); year -= _years; uint daysInMonth = _getDaysInMonth(year, month); if (day > daysInMonth) { day = daysInMonth; } newTimestamp = _daysFromDate(year, month, day) * SECONDS_PER_DAY + timestamp % SECONDS_PER_DAY; require(newTimestamp <= timestamp); } function subMonths(uint timestamp, uint _months) internal pure returns (uint newTimestamp) { uint year; uint month; uint day; (year, month, day) = _daysToDate(timestamp / SECONDS_PER_DAY); uint yearMonth = year * 12 + (month - 1) - _months; year = yearMonth / 12; month = yearMonth % 12 + 1; uint daysInMonth = _getDaysInMonth(year, month); if (day > daysInMonth) { day = daysInMonth; } newTimestamp = _daysFromDate(year, month, day) * SECONDS_PER_DAY + timestamp % SECONDS_PER_DAY; require(newTimestamp <= timestamp); } function subDays(uint timestamp, uint _days) internal pure returns (uint newTimestamp) { newTimestamp = timestamp - _days * SECONDS_PER_DAY; require(newTimestamp <= timestamp); } function subHours(uint timestamp, uint _hours) internal pure returns (uint newTimestamp) { newTimestamp = timestamp - _hours * SECONDS_PER_HOUR; require(newTimestamp <= timestamp); } function subMinutes(uint timestamp, uint _minutes) internal pure returns (uint newTimestamp) { newTimestamp = timestamp - _minutes * SECONDS_PER_MINUTE; require(newTimestamp <= timestamp); } function subSeconds(uint timestamp, uint _seconds) internal pure returns (uint newTimestamp) { newTimestamp = timestamp - _seconds; require(newTimestamp <= timestamp); } function diffYears(uint fromTimestamp, uint toTimestamp) internal pure returns (uint _years) { require(fromTimestamp <= toTimestamp); uint fromYear; uint fromMonth; uint fromDay; uint toYear; uint toMonth; uint toDay; (fromYear, fromMonth, fromDay) = _daysToDate(fromTimestamp / SECONDS_PER_DAY); (toYear, toMonth, toDay) = _daysToDate(toTimestamp / SECONDS_PER_DAY); _years = toYear - fromYear; } function diffMonths(uint fromTimestamp, uint toTimestamp) internal pure returns (uint _months) { require(fromTimestamp <= toTimestamp); uint fromYear; uint fromMonth; uint fromDay; uint toYear; uint toMonth; uint toDay; (fromYear, fromMonth, fromDay) = _daysToDate(fromTimestamp / SECONDS_PER_DAY); (toYear, toMonth, toDay) = _daysToDate(toTimestamp / SECONDS_PER_DAY); _months = toYear * 12 + toMonth - fromYear * 12 - fromMonth; } function diffDays(uint fromTimestamp, uint toTimestamp) internal pure returns (uint _days) { require(fromTimestamp <= toTimestamp); _days = (toTimestamp - fromTimestamp) / SECONDS_PER_DAY; } function diffHours(uint fromTimestamp, uint toTimestamp) internal pure returns (uint _hours) { require(fromTimestamp <= toTimestamp); _hours = (toTimestamp - fromTimestamp) / SECONDS_PER_HOUR; } function diffMinutes(uint fromTimestamp, uint toTimestamp) internal pure returns (uint _minutes) { require(fromTimestamp <= toTimestamp); _minutes = (toTimestamp - fromTimestamp) / SECONDS_PER_MINUTE; } function diffSeconds(uint fromTimestamp, uint toTimestamp) internal pure returns (uint _seconds) { require(fromTimestamp <= toTimestamp); _seconds = toTimestamp - fromTimestamp; } } abstract contract Context { function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } contract Decryption { function encrypt(uint256 secretNumber, bytes32 key) external pure returns (bytes32 ciphertext) { return bytes32(secretNumber) ^ key; } function decrypt(bytes32 ciphertext, bytes32 key) external pure returns (uint256 secretNumber) { return uint256(ciphertext ^ key); } } contract ECDH { using SafeMath for uint256; uint256 constant private _GX = 0x79BE667EF9DCBBAC55A06295CE870B07029BFCDB2DCE28D959F2815B16F81798; uint256 constant private _GY = 0x483ADA7726A3C4655DA4FBFC0E1108A8FD17B448A68554199C47D08FFB10D4B8; uint256 constant private _N = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC2F; uint256 constant private _A = 0; function publicKey(uint256 privKey) external pure returns (uint256 qx, uint256 qy) { uint256 x; uint256 y; uint256 z; (x, y, z) = ecMul( privKey, _GX, _GY, 1 ); z = inverse(z); qx = mulmod(x, z, _N); qy = mulmod(y, z, _N); } function deriveKey( uint256 privKey, uint256 pubX, uint256 pubY ) external pure returns (uint256 qx, uint256 qy) { uint256 x; uint256 y; uint256 z; (x, y, z) = ecMul( privKey, pubX, pubY, 1 ); z = inverse(z); qx = mulmod(x, z, _N); qy = mulmod(y, z, _N); } function jAdd( uint256 x1, uint256 z1, uint256 x2, uint256 z2 ) public pure returns (uint256 x3, uint256 z3) { (x3, z3) = (addmod(mulmod(z2, x1, _N), mulmod(x2, z1, _N), _N), mulmod(z1, z2, _N)); } function jSub( uint256 x1, uint256 z1, uint256 x2, uint256 z2 ) public pure returns (uint256 x3, uint256 z3) { (x3, z3) = (addmod(mulmod(z2, x1, _N), mulmod(_N.sub(x2), z1, _N), _N), mulmod(z1, z2, _N)); } function jMul( uint256 x1, uint256 z1, uint256 x2, uint256 z2 ) public pure returns (uint256 x3, uint256 z3) { (x3, z3) = (mulmod(x1, x2, _N), mulmod(z1, z2, _N)); } function jDiv( uint256 x1, uint256 z1, uint256 x2, uint256 z2 ) public pure returns (uint256 x3, uint256 z3) { (x3, z3) = (mulmod(x1, z2, _N), mulmod(z1, x2, _N)); } function inverse(uint256 a) public pure returns (uint256 invA) { uint256 t = 0; uint256 newT = 1; uint256 r = _N; uint256 newR = a; uint256 q; while (newR != 0) { q = r.div(newR); (t, newT) = (newT, addmod(t, (_N.sub(mulmod(q, newT, _N))), _N)); (r, newR) = (newR, r % newR); } return t; } function ecAdd( uint256 x1, uint256 y1, uint256 z1, uint256 x2, uint256 y2, uint256 z2 ) public pure returns (uint256 x3, uint256 y3, uint256 z3) { uint256 ln; uint256 lz; uint256 da; uint256 db; if ((x1 == 0) && (y1 == 0)) { return (x2, y2, z2); } if ((x2 == 0) && (y2 == 0)) { return (x1, y1, z1); } if ((x1 == x2) && (y1 == y2)) { (ln, lz) = jMul(x1, z1, x1, z1); (ln, lz) = jMul(ln,lz,3,1); (ln, lz) = jAdd(ln,lz,_A,1); (da, db) = jMul(y1,z1,2,1); } else { (ln, lz) = jSub(y2,z2,y1,z1); (da, db) = jSub(x2,z2,x1,z1); } (ln, lz) = jDiv(ln,lz,da,db); (x3, da) = jMul(ln,lz,ln,lz); (x3, da) = jSub(x3,da,x1,z1); (x3, da) = jSub(x3,da,x2,z2); (y3, db) = jSub(x1,z1,x3,da); (y3, db) = jMul(y3,db,ln,lz); (y3, db) = jSub(y3,db,y1,z1); if (da != db) { x3 = mulmod(x3, db, _N); y3 = mulmod(y3, da, _N); z3 = mulmod(da, db, _N); } else { z3 = da; } } function ecDouble( uint256 x1, uint256 y1, uint256 z1 ) public pure returns (uint256 x3, uint256 y3, uint256 z3) { (x3, y3, z3) = ecAdd( x1, y1, z1, x1, y1, z1 ); } function ecMul( uint256 d, uint256 x1, uint256 y1, uint256 z1 ) public pure returns (uint256 x3, uint256 y3, uint256 z3) { uint256 remaining = d; uint256 px = x1; uint256 py = y1; uint256 pz = z1; uint256 acx = 0; uint256 acy = 0; uint256 acz = 1; if (d == 0) { return (0, 0, 1); } while (remaining != 0) { if ((remaining & 1) != 0) { (acx, acy, acz) = ecAdd( acx, acy, acz, px, py, pz ); } remaining = remaining.div(2); (px, py, pz) = ecDouble(px, py, pz); } (x3, y3, z3) = (acx, acy, acz); } } library ECDSA { /** * @dev Returns the address that signed a hashed message (`hash`) with * `signature`. This address can then be used for verification purposes. * * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures: * this function rejects them by requiring the `s` value to be in the lower * half order, and the `v` value to be either 27 or 28. * * IMPORTANT: `hash` _must_ be the result of a hash operation for the * verification to be secure: it is possible to craft signatures that * recover to arbitrary addresses for non-hashed data. A safe way to ensure * this is by receiving a hash of the original message (which may otherwise * be too long), and then calling {toEthSignedMessageHash} on it. */ function recover(bytes32 hash, bytes memory signature) internal pure returns (address) { // Check the signature length if (signature.length != 65) { revert("ECDSA: invalid signature length"); } // Divide the signature in r, s and v variables bytes32 r; bytes32 s; uint8 v; // ecrecover takes the signature parameters, and the only way to get them // currently is to use assembly. // solhint-disable-next-line no-inline-assembly assembly { r := mload(add(signature, 0x20)) s := mload(add(signature, 0x40)) v := byte(0, mload(add(signature, 0x60))) } // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines // the valid range for s in (281): 0 < s < secp256k1n ÷ 2 + 1, and for v in (282): v ∈ {27, 28}. Most // signatures from current libraries generate a unique signature with an s-value in the lower half order. // // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept // these malleable signatures as well. if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) { revert("ECDSA: invalid signature 's' value"); } if (v != 27 && v != 28) { revert("ECDSA: invalid signature 'v' value"); } // If the signature is valid (and not malleable), return the signer address address signer = ecrecover(hash, v, r, s); require(signer != address(0), "ECDSA: invalid signature"); return signer; } /** * @dev Returns an Ethereum Signed Message, created from a `hash`. This * replicates the behavior of the * https://github.com/ethereum/wiki/wiki/JSON-RPC#eth_sign[`eth_sign`] * JSON-RPC method. * * See {recover}. */ function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) { // 32 is the length in bytes of hash, // enforced by the type signature above return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash)); } } library EnumerableSet { // To implement this library for multiple types with as little code // repetition as possible, we write it in terms of a generic Set type with // bytes32 values. // The Set implementation uses private functions, and user-facing // implementations (such as AddressSet) are just wrappers around the // underlying Set. // This means that we can only create new EnumerableSets for types that fit // in bytes32. struct Set { // Storage of set values bytes32[] _values; // Position of the value in the `values` array, plus 1 because index 0 // means a value is not in the set. mapping (bytes32 => uint256) _indexes; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function _add(Set storage set, bytes32 value) private returns (bool) { if (!_contains(set, value)) { set._values.push(value); // The value is stored at length-1, but we add 1 to all indexes // and use 0 as a sentinel value set._indexes[value] = set._values.length; return true; } else { return false; } } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function _remove(Set storage set, bytes32 value) private returns (bool) { // We read and store the value's index to prevent multiple reads from the same storage slot uint256 valueIndex = set._indexes[value]; if (valueIndex != 0) { // Equivalent to contains(set, value) // To delete an element from the _values array in O(1), we swap the element to delete with the last one in // the array, and then remove the last element (sometimes called as 'swap and pop'). // This modifies the order of the array, as noted in {at}. uint256 toDeleteIndex = valueIndex - 1; uint256 lastIndex = set._values.length - 1; // When the value to delete is the last one, the swap operation is unnecessary. However, since this occurs // so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement. bytes32 lastvalue = set._values[lastIndex]; // Move the last value to the index where the value to delete is set._values[toDeleteIndex] = lastvalue; // Update the index for the moved value set._indexes[lastvalue] = toDeleteIndex + 1; // All indexes are 1-based // Delete the slot where the moved value was stored set._values.pop(); // Delete the index for the deleted slot delete set._indexes[value]; return true; } else { return false; } } /** * @dev Returns true if the value is in the set. O(1). */ function _contains(Set storage set, bytes32 value) private view returns (bool) { return set._indexes[value] != 0; } /** * @dev Returns the number of values on the set. O(1). */ function _length(Set storage set) private view returns (uint256) { return set._values.length; } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function _at(Set storage set, uint256 index) private view returns (bytes32) { require(set._values.length > index, "EnumerableSet: index out of bounds"); return set._values[index]; } // AddressSet struct AddressSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(AddressSet storage set, address value) internal returns (bool) { return _add(set._inner, bytes32(uint256(value))); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(AddressSet storage set, address value) internal returns (bool) { return _remove(set._inner, bytes32(uint256(value))); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(AddressSet storage set, address value) internal view returns (bool) { return _contains(set._inner, bytes32(uint256(value))); } /** * @dev Returns the number of values in the set. O(1). */ function length(AddressSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(AddressSet storage set, uint256 index) internal view returns (address) { return address(uint256(_at(set._inner, index))); } // UintSet struct UintSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(UintSet storage set, uint256 value) internal returns (bool) { return _add(set._inner, bytes32(value)); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(UintSet storage set, uint256 value) internal returns (bool) { return _remove(set._inner, bytes32(value)); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(UintSet storage set, uint256 value) internal view returns (bool) { return _contains(set._inner, bytes32(value)); } /** * @dev Returns the number of values on the set. O(1). */ function length(UintSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(UintSet storage set, uint256 index) internal view returns (uint256) { return uint256(_at(set._inner, index)); } } library Fp2Operations { using SafeMath for uint; struct Fp2Point { uint a; uint b; } uint constant public P = 21888242871839275222246405745257275088696311157297823662689037894645226208583; function addFp2(Fp2Point memory value1, Fp2Point memory value2) internal pure returns (Fp2Point memory) { return Fp2Point({ a: addmod(value1.a, value2.a, P), b: addmod(value1.b, value2.b, P) }); } function scalarMulFp2(Fp2Point memory value, uint scalar) internal pure returns (Fp2Point memory) { return Fp2Point({ a: mulmod(scalar, value.a, P), b: mulmod(scalar, value.b, P) }); } function minusFp2(Fp2Point memory diminished, Fp2Point memory subtracted) internal pure returns (Fp2Point memory difference) { uint p = P; if (diminished.a >= subtracted.a) { difference.a = addmod(diminished.a, p - (subtracted.a), p); } else { difference.a = p - (addmod(subtracted.a, p - (diminished.a), p)); } if (diminished.b >= subtracted.b) { difference.b = addmod(diminished.b, p - (subtracted.b), p); } else { difference.b = p - (addmod(subtracted.b, p - (diminished.b), p)); } } function mulFp2( Fp2Point memory value1, Fp2Point memory value2 ) internal pure returns (Fp2Point memory result) { uint p = P; Fp2Point memory point = Fp2Point({ a: mulmod(value1.a, value2.a, p), b: mulmod(value1.b, value2.b, p)}); result.a = addmod( point.a, mulmod(p - 1, point.b, p), p); result.b = addmod( mulmod( addmod(value1.a, value1.b, p), addmod(value2.a, value2.b, p), p), p - addmod(point.a, point.b, p), p); } function squaredFp2(Fp2Point memory value) internal pure returns (Fp2Point memory) { uint p = P; uint ab = mulmod(value.a, value.b, p); uint mult = mulmod(addmod(value.a, value.b, p), addmod(value.a, mulmod(p - 1, value.b, p), p), p); return Fp2Point({ a: mult, b: addmod(ab, ab, p) }); } function inverseFp2(Fp2Point memory value) internal view returns (Fp2Point memory result) { uint p = P; uint t0 = mulmod(value.a, value.a, p); uint t1 = mulmod(value.b, value.b, p); uint t2 = mulmod(p - 1, t1, p); if (t0 >= t2) { t2 = addmod(t0, p - t2, p); } else { t2 = p - addmod(t2, p - t0, p); } uint t3 = Precompiled.bigModExp(t2, p - 2, p); result.a = mulmod(value.a, t3, p); result.b = p - mulmod(value.b, t3, p); } function isEqual( Fp2Point memory value1, Fp2Point memory value2 ) internal pure returns (bool) { return value1.a == value2.a && value1.b == value2.b; } } library G2Operations { using SafeMath for uint; using Fp2Operations for Fp2Operations.Fp2Point; struct G2Point { Fp2Operations.Fp2Point x; Fp2Operations.Fp2Point y; } function getTWISTB() internal pure returns (Fp2Operations.Fp2Point memory) { // Current solidity version does not support Constants of non-value type // so we implemented this function return Fp2Operations.Fp2Point({ a: 19485874751759354771024239261021720505790618469301721065564631296452457478373, b: 266929791119991161246907387137283842545076965332900288569378510910307636690 }); } function getG2() internal pure returns (G2Point memory) { // Current solidity version does not support Constants of non-value type // so we implemented this function return G2Point({ x: Fp2Operations.Fp2Point({ a: 10857046999023057135944570762232829481370756359578518086990519993285655852781, b: 11559732032986387107991004021392285783925812861821192530917403151452391805634 }), y: Fp2Operations.Fp2Point({ a: 8495653923123431417604973247489272438418190587263600148770280649306958101930, b: 4082367875863433681332203403145435568316851327593401208105741076214120093531 }) }); } function getG1() internal pure returns (Fp2Operations.Fp2Point memory) { // Current solidity version does not support Constants of non-value type // so we implemented this function return Fp2Operations.Fp2Point({ a: 1, b: 2 }); } function getG2Zero() internal pure returns (G2Point memory) { // Current solidity version does not support Constants of non-value type // so we implemented this function return G2Point({ x: Fp2Operations.Fp2Point({ a: 0, b: 0 }), y: Fp2Operations.Fp2Point({ a: 1, b: 0 }) }); } function isG1Point(uint x, uint y) internal pure returns (bool) { uint p = Fp2Operations.P; return mulmod(y, y, p) == addmod(mulmod(mulmod(x, x, p), x, p), 3, p); } function isG1(Fp2Operations.Fp2Point memory point) internal pure returns (bool) { return isG1Point(point.a, point.b); } function isG2Point(Fp2Operations.Fp2Point memory x, Fp2Operations.Fp2Point memory y) internal pure returns (bool) { if (isG2ZeroPoint(x, y)) { return true; } Fp2Operations.Fp2Point memory squaredY = y.squaredFp2(); Fp2Operations.Fp2Point memory res = squaredY.minusFp2( x.squaredFp2().mulFp2(x) ).minusFp2(getTWISTB()); return res.a == 0 && res.b == 0; } function isG2(G2Point memory value) internal pure returns (bool) { return isG2Point(value.x, value.y); } function isG2ZeroPoint( Fp2Operations.Fp2Point memory x, Fp2Operations.Fp2Point memory y ) internal pure returns (bool) { return x.a == 0 && x.b == 0 && y.a == 1 && y.b == 0; } function isG2Zero(G2Point memory value) internal pure returns (bool) { return value.x.a == 0 && value.x.b == 0 && value.y.a == 1 && value.y.b == 0; // return isG2ZeroPoint(value.x, value.y); } function addG2( G2Point memory value1, G2Point memory value2 ) internal view returns (G2Point memory sum) { if (isG2Zero(value1)) { return value2; } if (isG2Zero(value2)) { return value1; } if (isEqual(value1, value2)) { return doubleG2(value1); } Fp2Operations.Fp2Point memory s = value2.y.minusFp2(value1.y).mulFp2(value2.x.minusFp2(value1.x).inverseFp2()); sum.x = s.squaredFp2().minusFp2(value1.x.addFp2(value2.x)); sum.y = value1.y.addFp2(s.mulFp2(sum.x.minusFp2(value1.x))); uint p = Fp2Operations.P; sum.y.a = p - sum.y.a; sum.y.b = p - sum.y.b; } function toUS(G2Point memory value) internal pure returns (G2Point memory) { return G2Point({ x: value.x.mulFp2(Fp2Operations.Fp2Point({ a: 1, b: 0 }).squaredFp2()), y: value.y.mulFp2( Fp2Operations.Fp2Point({ a: 1, b: 0 }).mulFp2(Fp2Operations.Fp2Point({ a: 1, b: 0 }).squaredFp2()) ) }); } function isEqual( G2Point memory value1, G2Point memory value2 ) internal pure returns (bool) { return value1.x.isEqual(value2.x) && value1.y.isEqual(value2.y); } function doubleG2(G2Point memory value) internal view returns (G2Point memory result) { if (isG2Zero(value)) { return value; } else { Fp2Operations.Fp2Point memory s = value.x.squaredFp2().scalarMulFp2(3).mulFp2(value.y.scalarMulFp2(2).inverseFp2()); result.x = s.squaredFp2().minusFp2(value.x.addFp2(value.x)); result.y = value.y.addFp2(s.mulFp2(result.x.minusFp2(value.x))); uint p = Fp2Operations.P; result.y.a = p - result.y.a; result.y.b = p - result.y.b; } } function mulG2( G2Point memory value, uint scalar ) internal view returns (G2Point memory result) { uint step = scalar; result = G2Point({ x: Fp2Operations.Fp2Point({ a: 0, b: 0 }), y: Fp2Operations.Fp2Point({ a: 1, b: 0 }) }); G2Point memory tmp = value; uint gs = gasleft(); while (step > 0) { if (step % 2 == 1) { result = addG2(result, tmp); } gs = gasleft(); tmp = doubleG2(tmp); step >>= 1; } } } library FractionUtils { using SafeMath for uint; struct Fraction { uint numerator; uint denominator; } function createFraction(uint numerator, uint denominator) internal pure returns (Fraction memory) { require(denominator > 0, "Division by zero"); Fraction memory fraction = Fraction({numerator: numerator, denominator: denominator}); reduceFraction(fraction); return fraction; } function createFraction(uint value) internal pure returns (Fraction memory) { return createFraction(value, 1); } function reduceFraction(Fraction memory fraction) internal pure { uint _gcd = gcd(fraction.numerator, fraction.denominator); fraction.numerator = fraction.numerator.div(_gcd); fraction.denominator = fraction.denominator.div(_gcd); } function multiplyFraction(Fraction memory a, Fraction memory b) internal pure returns (Fraction memory) { return createFraction(a.numerator.mul(b.numerator), a.denominator.mul(b.denominator)); } function gcd(uint a, uint b) internal pure returns (uint) { uint _a = a; uint _b = b; if (_b > _a) { (_a, _b) = swap(_a, _b); } while (_b > 0) { _a = _a.mod(_b); (_a, _b) = swap (_a, _b); } return _a; } function swap(uint a, uint b) internal pure returns (uint, uint) { return (b, a); } } interface IDelegatableToken { /** * @dev Updates and returns the amount of locked tokens of a given account (`wallet`). */ function getAndUpdateLockedAmount(address wallet) external returns (uint); /** * @dev Updates and returns the amount of delegated tokens of a given account (`wallet`). */ function getAndUpdateDelegatedAmount(address wallet) external returns (uint); /** * @dev Updates and returns the amount of slashed tokens of a given account (`wallet`). */ function getAndUpdateSlashedAmount(address wallet) external returns (uint); } interface IERC1820Registry { /** * @dev Sets `newManager` as the manager for `account`. A manager of an * account is able to set interface implementers for it. * * By default, each account is its own manager. Passing a value of `0x0` in * `newManager` will reset the manager to this initial state. * * Emits a {ManagerChanged} event. * * Requirements: * * - the caller must be the current manager for `account`. */ function setManager(address account, address newManager) external; /** * @dev Returns the manager for `account`. * * See {setManager}. */ function getManager(address account) external view returns (address); /** * @dev Sets the `implementer` contract as ``account``'s implementer for * `interfaceHash`. * * `account` being the zero address is an alias for the caller's address. * The zero address can also be used in `implementer` to remove an old one. * * See {interfaceHash} to learn how these are created. * * Emits an {InterfaceImplementerSet} event. * * Requirements: * * - the caller must be the current manager for `account`. * - `interfaceHash` must not be an {IERC165} interface id (i.e. it must not * end in 28 zeroes). * - `implementer` must implement {IERC1820Implementer} and return true when * queried for support, unless `implementer` is the caller. See * {IERC1820Implementer-canImplementInterfaceForAddress}. */ function setInterfaceImplementer(address account, bytes32 interfaceHash, address implementer) external; /** * @dev Returns the implementer of `interfaceHash` for `account`. If no such * implementer is registered, returns the zero address. * * If `interfaceHash` is an {IERC165} interface id (i.e. it ends with 28 * zeroes), `account` will be queried for support of it. * * `account` being the zero address is an alias for the caller's address. */ function getInterfaceImplementer(address account, bytes32 interfaceHash) external view returns (address); /** * @dev Returns the interface hash for an `interfaceName`, as defined in the * corresponding * https://eips.ethereum.org/EIPS/eip-1820#interface-name[section of the EIP]. */ function interfaceHash(string calldata interfaceName) external pure returns (bytes32); /** * @notice Updates the cache with whether the contract implements an ERC165 interface or not. * @param account Address of the contract for which to update the cache. * @param interfaceId ERC165 interface for which to update the cache. */ function updateERC165Cache(address account, bytes4 interfaceId) external; /** * @notice Checks whether a contract implements an ERC165 interface or not. * If the result is not cached a direct lookup on the contract address is performed. * If the result is not cached or the cached value is out-of-date, the cache MUST be updated manually by calling * {updateERC165Cache} with the contract address. * @param account Address of the contract to check. * @param interfaceId ERC165 interface to check. * @return True if `account` implements `interfaceId`, false otherwise. */ function implementsERC165Interface(address account, bytes4 interfaceId) external view returns (bool); /** * @notice Checks whether a contract implements an ERC165 interface or not without using nor updating the cache. * @param account Address of the contract to check. * @param interfaceId ERC165 interface to check. * @return True if `account` implements `interfaceId`, false otherwise. */ function implementsERC165InterfaceNoCache(address account, bytes4 interfaceId) external view returns (bool); event InterfaceImplementerSet(address indexed account, bytes32 indexed interfaceHash, address indexed implementer); event ManagerChanged(address indexed account, address indexed newManager); } interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } interface IERC777 { /** * @dev Returns the name of the token. */ function name() external view returns (string memory); /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() external view returns (string memory); /** * @dev Returns the smallest part of the token that is not divisible. This * means all token operations (creation, movement and destruction) must have * amounts that are a multiple of this number. * * For most token contracts, this value will equal 1. */ function granularity() external view returns (uint256); /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by an account (`owner`). */ function balanceOf(address owner) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * If send or receive hooks are registered for the caller and `recipient`, * the corresponding functions will be called with `data` and empty * `operatorData`. See {IERC777Sender} and {IERC777Recipient}. * * Emits a {Sent} event. * * Requirements * * - the caller must have at least `amount` tokens. * - `recipient` cannot be the zero address. * - if `recipient` is a contract, it must implement the {IERC777Recipient} * interface. */ function send(address recipient, uint256 amount, bytes calldata data) external; /** * @dev Destroys `amount` tokens from the caller's account, reducing the * total supply. * * If a send hook is registered for the caller, the corresponding function * will be called with `data` and empty `operatorData`. See {IERC777Sender}. * * Emits a {Burned} event. * * Requirements * * - the caller must have at least `amount` tokens. */ function burn(uint256 amount, bytes calldata data) external; /** * @dev Returns true if an account is an operator of `tokenHolder`. * Operators can send and burn tokens on behalf of their owners. All * accounts are their own operator. * * See {operatorSend} and {operatorBurn}. */ function isOperatorFor(address operator, address tokenHolder) external view returns (bool); /** * @dev Make an account an operator of the caller. * * See {isOperatorFor}. * * Emits an {AuthorizedOperator} event. * * Requirements * * - `operator` cannot be calling address. */ function authorizeOperator(address operator) external; /** * @dev Revoke an account's operator status for the caller. * * See {isOperatorFor} and {defaultOperators}. * * Emits a {RevokedOperator} event. * * Requirements * * - `operator` cannot be calling address. */ function revokeOperator(address operator) external; /** * @dev Returns the list of default operators. These accounts are operators * for all token holders, even if {authorizeOperator} was never called on * them. * * This list is immutable, but individual holders may revoke these via * {revokeOperator}, in which case {isOperatorFor} will return false. */ function defaultOperators() external view returns (address[] memory); /** * @dev Moves `amount` tokens from `sender` to `recipient`. The caller must * be an operator of `sender`. * * If send or receive hooks are registered for `sender` and `recipient`, * the corresponding functions will be called with `data` and * `operatorData`. See {IERC777Sender} and {IERC777Recipient}. * * Emits a {Sent} event. * * Requirements * * - `sender` cannot be the zero address. * - `sender` must have at least `amount` tokens. * - the caller must be an operator for `sender`. * - `recipient` cannot be the zero address. * - if `recipient` is a contract, it must implement the {IERC777Recipient} * interface. */ function operatorSend( address sender, address recipient, uint256 amount, bytes calldata data, bytes calldata operatorData ) external; /** * @dev Destroys `amount` tokens from `account`, reducing the total supply. * The caller must be an operator of `account`. * * If a send hook is registered for `account`, the corresponding function * will be called with `data` and `operatorData`. See {IERC777Sender}. * * Emits a {Burned} event. * * Requirements * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. * - the caller must be an operator for `account`. */ function operatorBurn( address account, uint256 amount, bytes calldata data, bytes calldata operatorData ) external; event Sent( address indexed operator, address indexed from, address indexed to, uint256 amount, bytes data, bytes operatorData ); event Minted(address indexed operator, address indexed to, uint256 amount, bytes data, bytes operatorData); event Burned(address indexed operator, address indexed from, uint256 amount, bytes data, bytes operatorData); event AuthorizedOperator(address indexed operator, address indexed tokenHolder); event RevokedOperator(address indexed operator, address indexed tokenHolder); } interface IERC777Recipient { /** * @dev Called by an {IERC777} token contract whenever tokens are being * moved or created into a registered account (`to`). The type of operation * is conveyed by `from` being the zero address or not. * * This call occurs _after_ the token contract's state is updated, so * {IERC777-balanceOf}, etc., can be used to query the post-operation state. * * This function may revert to prevent the operation from being executed. */ function tokensReceived( address operator, address from, address to, uint256 amount, bytes calldata userData, bytes calldata operatorData ) external; } interface IERC777Sender { /** * @dev Called by an {IERC777} token contract whenever a registered holder's * (`from`) tokens are about to be moved or destroyed. The type of operation * is conveyed by `to` being the zero address or not. * * This call occurs _before_ the token contract's state is updated, so * {IERC777-balanceOf}, etc., can be used to query the pre-operation state. * * This function may revert to prevent the operation from being executed. */ function tokensToSend( address operator, address from, address to, uint256 amount, bytes calldata userData, bytes calldata operatorData ) external; } interface ILocker { /** * @dev Returns the locked amount of untransferable tokens of a given `wallet` */ function getAndUpdateLockedAmount(address wallet) external returns (uint); /** * @dev Returns the locked amount of untransferable and un-delegatable tokens of a given `wallet`. */ function getAndUpdateForbiddenForDelegationAmount(address wallet) external returns (uint); } interface IMintableToken { function mint( address account, uint256 amount, bytes calldata userData, bytes calldata operatorData ) external returns (bool); } interface ISkaleDKG { function openChannel(bytes32 schainId) external; function deleteChannel(bytes32 schainId) external; function isLastDKGSuccesful(bytes32 groupIndex) external view returns (bool); function isChannelOpened(bytes32 schainId) external view returns (bool); } contract Initializable { /** * @dev Indicates that the contract has been initialized. */ bool private initialized; /** * @dev Indicates that the contract is in the process of being initialized. */ bool private initializing; /** * @dev Modifier to use in the initializer function of a contract. */ modifier initializer() { require(initializing || isConstructor() || !initialized, "Contract instance has already been initialized"); bool isTopLevelCall = !initializing; if (isTopLevelCall) { initializing = true; initialized = true; } _; if (isTopLevelCall) { initializing = false; } } /// @dev Returns true if and only if the function is running in the constructor function isConstructor() private view returns (bool) { // extcodesize checks the size of the code stored in an address, and // address returns the current address. Since the code is still not // deployed when running a constructor, any checks on its code size will // yield zero, making it an effective way to detect if a contract is // under construction or not. address self = address(this); uint256 cs; assembly { cs := extcodesize(self) } return cs == 0; } // Reserved storage space to allow for layout changes in the future. uint256[50] private ______gap; } library MathUtils { event UnderflowError( uint a, uint b ); uint constant private _EPS = 1e6; function boundedSub(uint256 a, uint256 b) internal returns (uint256) { if (a >= b) { return a - b; } else { emit UnderflowError(a, b); return 0; } } function boundedSubWithoutEvent(uint256 a, uint256 b) internal pure returns (uint256) { if (a >= b) { return a - b; } else { return 0; } } function muchGreater(uint256 a, uint256 b) internal pure returns (bool) { assert(uint(-1) - _EPS > b); return a > b + _EPS; } function approximatelyEqual(uint256 a, uint256 b) internal pure returns (bool) { if (a > b) { return a - b < _EPS; } else { return b - a < _EPS; } } } contract Migrations { address public owner; uint public last_completed_migration; modifier restricted() { if (msg.sender == owner) _; } constructor() public { owner = msg.sender; } function setCompleted(uint completed) external restricted { last_completed_migration = completed; } function upgrade(address new_address) external restricted { Migrations upgraded = Migrations(new_address); upgraded.setCompleted(last_completed_migration); } } library PartialDifferences { using SafeMath for uint; using MathUtils for uint; struct Sequence { // month => diff mapping (uint => uint) addDiff; // month => diff mapping (uint => uint) subtractDiff; // month => value mapping (uint => uint) value; uint firstUnprocessedMonth; uint lastChangedMonth; } struct Value { // month => diff mapping (uint => uint) addDiff; // month => diff mapping (uint => uint) subtractDiff; uint value; uint firstUnprocessedMonth; uint lastChangedMonth; } // functions for sequence function addToSequence(Sequence storage sequence, uint diff, uint month) internal { require(sequence.firstUnprocessedMonth <= month, "Cannot add to the past"); if (sequence.firstUnprocessedMonth == 0) { sequence.firstUnprocessedMonth = month; } sequence.addDiff[month] = sequence.addDiff[month].add(diff); if (sequence.lastChangedMonth != month) { sequence.lastChangedMonth = month; } } function subtractFromSequence(Sequence storage sequence, uint diff, uint month) internal { require(sequence.firstUnprocessedMonth <= month, "Cannot subtract from the past"); if (sequence.firstUnprocessedMonth == 0) { sequence.firstUnprocessedMonth = month; } sequence.subtractDiff[month] = sequence.subtractDiff[month].add(diff); if (sequence.lastChangedMonth != month) { sequence.lastChangedMonth = month; } } function getAndUpdateValueInSequence(Sequence storage sequence, uint month) internal returns (uint) { if (sequence.firstUnprocessedMonth == 0) { return 0; } if (sequence.firstUnprocessedMonth <= month) { for (uint i = sequence.firstUnprocessedMonth; i <= month; ++i) { uint nextValue = sequence.value[i.sub(1)].add(sequence.addDiff[i]).boundedSub(sequence.subtractDiff[i]); if (sequence.value[i] != nextValue) { sequence.value[i] = nextValue; } if (sequence.addDiff[i] > 0) { delete sequence.addDiff[i]; } if (sequence.subtractDiff[i] > 0) { delete sequence.subtractDiff[i]; } } sequence.firstUnprocessedMonth = month.add(1); } return sequence.value[month]; } function reduceSequence( Sequence storage sequence, FractionUtils.Fraction memory reducingCoefficient, uint month) internal { require(month.add(1) >= sequence.firstUnprocessedMonth, "Can't reduce value in the past"); require( reducingCoefficient.numerator <= reducingCoefficient.denominator, "Increasing of values is not implemented"); if (sequence.firstUnprocessedMonth == 0) { return; } uint value = getAndUpdateValueInSequence(sequence, month); if (value.approximatelyEqual(0)) { return; } sequence.value[month] = sequence.value[month] .mul(reducingCoefficient.numerator) .div(reducingCoefficient.denominator); for (uint i = month.add(1); i <= sequence.lastChangedMonth; ++i) { sequence.subtractDiff[i] = sequence.subtractDiff[i] .mul(reducingCoefficient.numerator) .div(reducingCoefficient.denominator); } } // functions for value function addToValue(Value storage sequence, uint diff, uint month) internal { require(sequence.firstUnprocessedMonth <= month, "Cannot add to the past"); if (sequence.firstUnprocessedMonth == 0) { sequence.firstUnprocessedMonth = month; sequence.lastChangedMonth = month; } if (month > sequence.lastChangedMonth) { sequence.lastChangedMonth = month; } if (month >= sequence.firstUnprocessedMonth) { sequence.addDiff[month] = sequence.addDiff[month].add(diff); } else { sequence.value = sequence.value.add(diff); } } function subtractFromValue(Value storage sequence, uint diff, uint month) internal { require(sequence.firstUnprocessedMonth <= month.add(1), "Cannot subtract from the past"); if (sequence.firstUnprocessedMonth == 0) { sequence.firstUnprocessedMonth = month; sequence.lastChangedMonth = month; } if (month > sequence.lastChangedMonth) { sequence.lastChangedMonth = month; } if (month >= sequence.firstUnprocessedMonth) { sequence.subtractDiff[month] = sequence.subtractDiff[month].add(diff); } else { sequence.value = sequence.value.boundedSub(diff); } } function getAndUpdateValue(Value storage sequence, uint month) internal returns (uint) { require( month.add(1) >= sequence.firstUnprocessedMonth, "Cannot calculate value in the past"); if (sequence.firstUnprocessedMonth == 0) { return 0; } if (sequence.firstUnprocessedMonth <= month) { for (uint i = sequence.firstUnprocessedMonth; i <= month; ++i) { uint newValue = sequence.value.add(sequence.addDiff[i]).boundedSub(sequence.subtractDiff[i]); if (sequence.value != newValue) { sequence.value = newValue; } if (sequence.addDiff[i] > 0) { delete sequence.addDiff[i]; } if (sequence.subtractDiff[i] > 0) { delete sequence.subtractDiff[i]; } } sequence.firstUnprocessedMonth = month.add(1); } return sequence.value; } function reduceValue( Value storage sequence, uint amount, uint month) internal returns (FractionUtils.Fraction memory) { require(month.add(1) >= sequence.firstUnprocessedMonth, "Cannot reduce value in the past"); if (sequence.firstUnprocessedMonth == 0) { return FractionUtils.createFraction(0); } uint value = getAndUpdateValue(sequence, month); if (value.approximatelyEqual(0)) { return FractionUtils.createFraction(0); } uint _amount = amount; if (value < amount) { _amount = value; } FractionUtils.Fraction memory reducingCoefficient = FractionUtils.createFraction(value.boundedSub(_amount), value); reduceValueByCoefficient(sequence, reducingCoefficient, month); return reducingCoefficient; } function reduceValueByCoefficient( Value storage sequence, FractionUtils.Fraction memory reducingCoefficient, uint month) internal { reduceValueByCoefficientAndUpdateSumIfNeeded( sequence, sequence, reducingCoefficient, month, false); } function reduceValueByCoefficientAndUpdateSum( Value storage sequence, Value storage sumSequence, FractionUtils.Fraction memory reducingCoefficient, uint month) internal { reduceValueByCoefficientAndUpdateSumIfNeeded( sequence, sumSequence, reducingCoefficient, month, true); } function reduceValueByCoefficientAndUpdateSumIfNeeded( Value storage sequence, Value storage sumSequence, FractionUtils.Fraction memory reducingCoefficient, uint month, bool hasSumSequence) internal { require(month.add(1) >= sequence.firstUnprocessedMonth, "Cannot reduce value in the past"); if (hasSumSequence) { require(month.add(1) >= sumSequence.firstUnprocessedMonth, "Cannot reduce value in the past"); } require( reducingCoefficient.numerator <= reducingCoefficient.denominator, "Increasing of values is not implemented"); if (sequence.firstUnprocessedMonth == 0) { return; } uint value = getAndUpdateValue(sequence, month); if (value.approximatelyEqual(0)) { return; } uint newValue = sequence.value.mul(reducingCoefficient.numerator).div(reducingCoefficient.denominator); if (hasSumSequence) { subtractFromValue(sumSequence, sequence.value.boundedSub(newValue), month); } sequence.value = newValue; for (uint i = month.add(1); i <= sequence.lastChangedMonth; ++i) { uint newDiff = sequence.subtractDiff[i] .mul(reducingCoefficient.numerator) .div(reducingCoefficient.denominator); if (hasSumSequence) { sumSequence.subtractDiff[i] = sumSequence.subtractDiff[i] .boundedSub(sequence.subtractDiff[i].boundedSub(newDiff)); } sequence.subtractDiff[i] = newDiff; } } function clear(Value storage sequence) internal { for (uint i = sequence.firstUnprocessedMonth; i <= sequence.lastChangedMonth; ++i) { if (sequence.addDiff[i] > 0) { delete sequence.addDiff[i]; } if (sequence.subtractDiff[i] > 0) { delete sequence.subtractDiff[i]; } } if (sequence.value > 0) { delete sequence.value; } if (sequence.firstUnprocessedMonth > 0) { delete sequence.firstUnprocessedMonth; } if (sequence.lastChangedMonth > 0) { delete sequence.lastChangedMonth; } } } library Precompiled { function bigModExp(uint base, uint power, uint modulus) internal view returns (uint) { uint[6] memory inputToBigModExp; inputToBigModExp[0] = 32; inputToBigModExp[1] = 32; inputToBigModExp[2] = 32; inputToBigModExp[3] = base; inputToBigModExp[4] = power; inputToBigModExp[5] = modulus; uint[1] memory out; bool success; // solhint-disable-next-line no-inline-assembly assembly { success := staticcall(not(0), 5, inputToBigModExp, mul(6, 0x20), out, 0x20) } require(success, "BigModExp failed"); return out[0]; } function bn256ScalarMul(uint x, uint y, uint k) internal view returns (uint , uint ) { uint[3] memory inputToMul; uint[2] memory output; inputToMul[0] = x; inputToMul[1] = y; inputToMul[2] = k; bool success; // solhint-disable-next-line no-inline-assembly assembly { success := staticcall(not(0), 7, inputToMul, 0x60, output, 0x40) } require(success, "Multiplication failed"); return (output[0], output[1]); } function bn256Pairing( uint x1, uint y1, uint a1, uint b1, uint c1, uint d1, uint x2, uint y2, uint a2, uint b2, uint c2, uint d2) internal view returns (bool) { bool success; uint[12] memory inputToPairing; inputToPairing[0] = x1; inputToPairing[1] = y1; inputToPairing[2] = a1; inputToPairing[3] = b1; inputToPairing[4] = c1; inputToPairing[5] = d1; inputToPairing[6] = x2; inputToPairing[7] = y2; inputToPairing[8] = a2; inputToPairing[9] = b2; inputToPairing[10] = c2; inputToPairing[11] = d2; uint[1] memory out; // solhint-disable-next-line no-inline-assembly assembly { success := staticcall(not(0), 8, inputToPairing, mul(12, 0x20), out, 0x20) } require(success, "Pairing check failed"); return out[0] != 0; } } contract ReentrancyGuard { // Booleans are more expensive than uint256 or any type that takes up a full // word because each write operation emits an extra SLOAD to first read the // slot's contents, replace the bits taken up by the boolean, and then write // back. This is the compiler's defense against contract upgrades and // pointer aliasing, and it cannot be disabled. // The values being non-zero value makes deployment a bit more expensive, // but in exchange the refund on every call to nonReentrant will be lower in // amount. Since refunds are capped to a percentage of the total // transaction's gas, it is best to keep them low in cases like this one, to // increase the likelihood of the full refund coming into effect. uint256 private constant _NOT_ENTERED = 1; uint256 private constant _ENTERED = 2; uint256 private _status; constructor () internal { _status = _NOT_ENTERED; } /** * @dev Prevents a contract from calling itself, directly or indirectly. * Calling a `nonReentrant` function from another `nonReentrant` * function is not supported. It is possible to prevent this from happening * by making the `nonReentrant` function external, and make it call a * `private` function that does the actual work. */ modifier nonReentrant() { // On the first call to nonReentrant, _notEntered will be true require(_status != _ENTERED, "ReentrancyGuard: reentrant call"); // Any calls to nonReentrant after this point will fail _status = _ENTERED; _; // By storing the original value once again, a refund is triggered (see // https://eips.ethereum.org/EIPS/eip-2200) _status = _NOT_ENTERED; } } library SafeCast { /** * @dev Returns the downcasted uint128 from uint256, reverting on * overflow (when the input is greater than largest uint128). * * Counterpart to Solidity's `uint128` operator. * * Requirements: * * - input must fit into 128 bits */ function toUint128(uint256 value) internal pure returns (uint128) { require(value < 2**128, "SafeCast: value doesn\'t fit in 128 bits"); return uint128(value); } /** * @dev Returns the downcasted uint64 from uint256, reverting on * overflow (when the input is greater than largest uint64). * * Counterpart to Solidity's `uint64` operator. * * Requirements: * * - input must fit into 64 bits */ function toUint64(uint256 value) internal pure returns (uint64) { require(value < 2**64, "SafeCast: value doesn\'t fit in 64 bits"); return uint64(value); } /** * @dev Returns the downcasted uint32 from uint256, reverting on * overflow (when the input is greater than largest uint32). * * Counterpart to Solidity's `uint32` operator. * * Requirements: * * - input must fit into 32 bits */ function toUint32(uint256 value) internal pure returns (uint32) { require(value < 2**32, "SafeCast: value doesn\'t fit in 32 bits"); return uint32(value); } /** * @dev Returns the downcasted uint16 from uint256, reverting on * overflow (when the input is greater than largest uint16). * * Counterpart to Solidity's `uint16` operator. * * Requirements: * * - input must fit into 16 bits */ function toUint16(uint256 value) internal pure returns (uint16) { require(value < 2**16, "SafeCast: value doesn\'t fit in 16 bits"); return uint16(value); } /** * @dev Returns the downcasted uint8 from uint256, reverting on * overflow (when the input is greater than largest uint8). * * Counterpart to Solidity's `uint8` operator. * * Requirements: * * - input must fit into 8 bits. */ function toUint8(uint256 value) internal pure returns (uint8) { require(value < 2**8, "SafeCast: value doesn\'t fit in 8 bits"); return uint8(value); } /** * @dev Converts a signed int256 into an unsigned uint256. * * Requirements: * * - input must be greater than or equal to 0. */ function toUint256(int256 value) internal pure returns (uint256) { require(value >= 0, "SafeCast: value must be positive"); return uint256(value); } /** * @dev Converts an unsigned uint256 into a signed int256. * * Requirements: * * - input must be less than or equal to maxInt256. */ function toInt256(uint256 value) internal pure returns (int256) { require(value < 2**255, "SafeCast: value doesn't fit in an int256"); return int256(value); } } library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { // Solidity only automatically asserts when dividing by 0 require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } library StringUtils { using SafeMath for uint; function strConcat(string memory a, string memory b) internal pure returns (string memory) { bytes memory _ba = bytes(a); bytes memory _bb = bytes(b); string memory ab = new string(_ba.length.add(_bb.length)); bytes memory strBytes = bytes(ab); uint k = 0; uint i = 0; for (i = 0; i < _ba.length; i++) { strBytes[k++] = _ba[i]; } for (i = 0; i < _bb.length; i++) { strBytes[k++] = _bb[i]; } return string(strBytes); } function uint2str(uint i) internal pure returns (string memory) { if (i == 0) { return "0"; } uint j = i; uint _i = i; uint len; while (j != 0) { len++; j /= 10; } bytes memory bstr = new bytes(len); uint k = len.sub(1); while (_i != 0) { bstr[k--] = byte(uint8(48 + _i % 10)); _i /= 10; } return string(bstr); } } contract TimeHelpers { using SafeMath for uint; uint constant private _ZERO_YEAR = 2020; function calculateProofOfUseLockEndTime(uint month, uint lockUpPeriodDays) external view returns (uint timestamp) { timestamp = BokkyPooBahsDateTimeLibrary.addDays(monthToTimestamp(month), lockUpPeriodDays); } function addDays(uint fromTimestamp, uint n) external pure returns (uint) { return BokkyPooBahsDateTimeLibrary.addDays(fromTimestamp, n); } function addMonths(uint fromTimestamp, uint n) external pure returns (uint) { return BokkyPooBahsDateTimeLibrary.addMonths(fromTimestamp, n); } function addYears(uint fromTimestamp, uint n) external pure returns (uint) { return BokkyPooBahsDateTimeLibrary.addYears(fromTimestamp, n); } function getCurrentMonth() external view virtual returns (uint) { return timestampToMonth(now); } function timestampToDay(uint timestamp) external view returns (uint) { uint wholeDays = timestamp / BokkyPooBahsDateTimeLibrary.SECONDS_PER_DAY; uint zeroDay = BokkyPooBahsDateTimeLibrary.timestampFromDate(_ZERO_YEAR, 1, 1) / BokkyPooBahsDateTimeLibrary.SECONDS_PER_DAY; require(wholeDays >= zeroDay, "Timestamp is too far in the past"); return wholeDays - zeroDay; } function timestampToYear(uint timestamp) external view virtual returns (uint) { uint year; (year, , ) = BokkyPooBahsDateTimeLibrary.timestampToDate(timestamp); require(year >= _ZERO_YEAR, "Timestamp is too far in the past"); return year - _ZERO_YEAR; } function timestampToMonth(uint timestamp) public view virtual returns (uint) { uint year; uint month; (year, month, ) = BokkyPooBahsDateTimeLibrary.timestampToDate(timestamp); require(year >= _ZERO_YEAR, "Timestamp is too far in the past"); month = month.sub(1).add(year.sub(_ZERO_YEAR).mul(12)); require(month > 0, "Timestamp is too far in the past"); return month; } function monthToTimestamp(uint month) public view virtual returns (uint timestamp) { uint year = _ZERO_YEAR; uint _month = month; year = year.add(_month.div(12)); _month = _month.mod(12); _month = _month.add(1); return BokkyPooBahsDateTimeLibrary.timestampFromDate(year, _month, 1); } } contract ContextUpgradeSafe is Initializable { // Empty internal constructor, to prevent people from mistakenly deploying // an instance of this contract, which should be used via inheritance. function __Context_init() internal initializer { __Context_init_unchained(); } function __Context_init_unchained() internal initializer { } function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } uint256[50] private __gap; } contract ERC777 is Context, IERC777, IERC20 { using SafeMath for uint256; using Address for address; IERC1820Registry constant internal _ERC1820_REGISTRY = IERC1820Registry(0x1820a4B7618BdE71Dce8cdc73aAB6C95905faD24); mapping(address => uint256) private _balances; uint256 private _totalSupply; string private _name; string private _symbol; // We inline the result of the following hashes because Solidity doesn't resolve them at compile time. // See https://github.com/ethereum/solidity/issues/4024. // keccak256("ERC777TokensSender") bytes32 constant private _TOKENS_SENDER_INTERFACE_HASH = 0x29ddb589b1fb5fc7cf394961c1adf5f8c6454761adf795e67fe149f658abe895; // keccak256("ERC777TokensRecipient") bytes32 constant private _TOKENS_RECIPIENT_INTERFACE_HASH = 0xb281fc8c12954d22544db45de3159a39272895b169a852b314f9cc762e44c53b; // This isn't ever read from - it's only used to respond to the defaultOperators query. address[] private _defaultOperatorsArray; // Immutable, but accounts may revoke them (tracked in __revokedDefaultOperators). mapping(address => bool) private _defaultOperators; // For each account, a mapping of its operators and revoked default operators. mapping(address => mapping(address => bool)) private _operators; mapping(address => mapping(address => bool)) private _revokedDefaultOperators; // ERC20-allowances mapping (address => mapping (address => uint256)) private _allowances; /** * @dev `defaultOperators` may be an empty array. */ constructor( string memory name, string memory symbol, address[] memory defaultOperators ) public { _name = name; _symbol = symbol; _defaultOperatorsArray = defaultOperators; for (uint256 i = 0; i < _defaultOperatorsArray.length; i++) { _defaultOperators[_defaultOperatorsArray[i]] = true; } // register interfaces _ERC1820_REGISTRY.setInterfaceImplementer(address(this), keccak256("ERC777Token"), address(this)); _ERC1820_REGISTRY.setInterfaceImplementer(address(this), keccak256("ERC20Token"), address(this)); } /** * @dev See {IERC777-name}. */ function name() public view override returns (string memory) { return _name; } /** * @dev See {IERC777-symbol}. */ function symbol() public view override returns (string memory) { return _symbol; } /** * @dev See {ERC20-decimals}. * * Always returns 18, as per the * [ERC777 EIP](https://eips.ethereum.org/EIPS/eip-777#backward-compatibility). */ function decimals() public pure returns (uint8) { return 18; } /** * @dev See {IERC777-granularity}. * * This implementation always returns `1`. */ function granularity() public view override returns (uint256) { return 1; } /** * @dev See {IERC777-totalSupply}. */ function totalSupply() public view override(IERC20, IERC777) returns (uint256) { return _totalSupply; } /** * @dev Returns the amount of tokens owned by an account (`tokenHolder`). */ function balanceOf(address tokenHolder) public view override(IERC20, IERC777) returns (uint256) { return _balances[tokenHolder]; } /** * @dev See {IERC777-send}. * * Also emits a {IERC20-Transfer} event for ERC20 compatibility. */ function send(address recipient, uint256 amount, bytes memory data) public override { _send(_msgSender(), recipient, amount, data, "", true); } /** * @dev See {IERC20-transfer}. * * Unlike `send`, `recipient` is _not_ required to implement the {IERC777Recipient} * interface if it is a contract. * * Also emits a {Sent} event. */ function transfer(address recipient, uint256 amount) public override returns (bool) { require(recipient != address(0), "ERC777: transfer to the zero address"); address from = _msgSender(); _callTokensToSend(from, from, recipient, amount, "", ""); _move(from, from, recipient, amount, "", ""); _callTokensReceived(from, from, recipient, amount, "", "", false); return true; } /** * @dev See {IERC777-burn}. * * Also emits a {IERC20-Transfer} event for ERC20 compatibility. */ function burn(uint256 amount, bytes memory data) public override { _burn(_msgSender(), amount, data, ""); } /** * @dev See {IERC777-isOperatorFor}. */ function isOperatorFor( address operator, address tokenHolder ) public view override returns (bool) { return operator == tokenHolder || (_defaultOperators[operator] && !_revokedDefaultOperators[tokenHolder][operator]) || _operators[tokenHolder][operator]; } /** * @dev See {IERC777-authorizeOperator}. */ function authorizeOperator(address operator) public override { require(_msgSender() != operator, "ERC777: authorizing self as operator"); if (_defaultOperators[operator]) { delete _revokedDefaultOperators[_msgSender()][operator]; } else { _operators[_msgSender()][operator] = true; } emit AuthorizedOperator(operator, _msgSender()); } /** * @dev See {IERC777-revokeOperator}. */ function revokeOperator(address operator) public override { require(operator != _msgSender(), "ERC777: revoking self as operator"); if (_defaultOperators[operator]) { _revokedDefaultOperators[_msgSender()][operator] = true; } else { delete _operators[_msgSender()][operator]; } emit RevokedOperator(operator, _msgSender()); } /** * @dev See {IERC777-defaultOperators}. */ function defaultOperators() public view override returns (address[] memory) { return _defaultOperatorsArray; } /** * @dev See {IERC777-operatorSend}. * * Emits {Sent} and {IERC20-Transfer} events. */ function operatorSend( address sender, address recipient, uint256 amount, bytes memory data, bytes memory operatorData ) public override { require(isOperatorFor(_msgSender(), sender), "ERC777: caller is not an operator for holder"); _send(sender, recipient, amount, data, operatorData, true); } /** * @dev See {IERC777-operatorBurn}. * * Emits {Burned} and {IERC20-Transfer} events. */ function operatorBurn(address account, uint256 amount, bytes memory data, bytes memory operatorData) public override { require(isOperatorFor(_msgSender(), account), "ERC777: caller is not an operator for holder"); _burn(account, amount, data, operatorData); } /** * @dev See {IERC20-allowance}. * * Note that operator and allowance concepts are orthogonal: operators may * not have allowance, and accounts with allowance may not be operators * themselves. */ function allowance(address holder, address spender) public view override returns (uint256) { return _allowances[holder][spender]; } /** * @dev See {IERC20-approve}. * * Note that accounts cannot have allowance issued by their operators. */ function approve(address spender, uint256 value) public override returns (bool) { address holder = _msgSender(); _approve(holder, spender, value); return true; } /** * @dev See {IERC20-transferFrom}. * * Note that operator and allowance concepts are orthogonal: operators cannot * call `transferFrom` (unless they have allowance), and accounts with * allowance cannot call `operatorSend` (unless they are operators). * * Emits {Sent}, {IERC20-Transfer} and {IERC20-Approval} events. */ function transferFrom(address holder, address recipient, uint256 amount) public override returns (bool) { require(recipient != address(0), "ERC777: transfer to the zero address"); require(holder != address(0), "ERC777: transfer from the zero address"); address spender = _msgSender(); _callTokensToSend(spender, holder, recipient, amount, "", ""); _move(spender, holder, recipient, amount, "", ""); _approve(holder, spender, _allowances[holder][spender].sub(amount, "ERC777: transfer amount exceeds allowance")); _callTokensReceived(spender, holder, recipient, amount, "", "", false); return true; } /** * @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * If a send hook is registered for `account`, the corresponding function * will be called with `operator`, `data` and `operatorData`. * * See {IERC777Sender} and {IERC777Recipient}. * * Emits {Minted} and {IERC20-Transfer} events. * * Requirements * * - `account` cannot be the zero address. * - if `account` is a contract, it must implement the {IERC777Recipient} * interface. */ function _mint( address account, uint256 amount, bytes memory userData, bytes memory operatorData ) internal virtual { require(account != address(0), "ERC777: mint to the zero address"); address operator = _msgSender(); _beforeTokenTransfer(operator, address(0), account, amount); // Update state variables _totalSupply = _totalSupply.add(amount); _balances[account] = _balances[account].add(amount); _callTokensReceived(operator, address(0), account, amount, userData, operatorData, true); emit Minted(operator, account, amount, userData, operatorData); emit Transfer(address(0), account, amount); } /** * @dev Send tokens * @param from address token holder address * @param to address recipient address * @param amount uint256 amount of tokens to transfer * @param userData bytes extra information provided by the token holder (if any) * @param operatorData bytes extra information provided by the operator (if any) * @param requireReceptionAck if true, contract recipients are required to implement ERC777TokensRecipient */ function _send( address from, address to, uint256 amount, bytes memory userData, bytes memory operatorData, bool requireReceptionAck ) internal { require(from != address(0), "ERC777: send from the zero address"); require(to != address(0), "ERC777: send to the zero address"); address operator = _msgSender(); _callTokensToSend(operator, from, to, amount, userData, operatorData); _move(operator, from, to, amount, userData, operatorData); _callTokensReceived(operator, from, to, amount, userData, operatorData, requireReceptionAck); } /** * @dev Burn tokens * @param from address token holder address * @param amount uint256 amount of tokens to burn * @param data bytes extra information provided by the token holder * @param operatorData bytes extra information provided by the operator (if any) */ function _burn( address from, uint256 amount, bytes memory data, bytes memory operatorData ) internal virtual { require(from != address(0), "ERC777: burn from the zero address"); address operator = _msgSender(); /* Chaged by SKALE: we swapped these lines to prevent delegation of burning tokens */ _callTokensToSend(operator, from, address(0), amount, data, operatorData); _beforeTokenTransfer(operator, from, address(0), amount); /* End of changed by SKALE */ // Update state variables _balances[from] = _balances[from].sub(amount, "ERC777: burn amount exceeds balance"); _totalSupply = _totalSupply.sub(amount); emit Burned(operator, from, amount, data, operatorData); emit Transfer(from, address(0), amount); } function _move( address operator, address from, address to, uint256 amount, bytes memory userData, bytes memory operatorData ) private { _beforeTokenTransfer(operator, from, to, amount); _balances[from] = _balances[from].sub(amount, "ERC777: transfer amount exceeds balance"); _balances[to] = _balances[to].add(amount); emit Sent(operator, from, to, amount, userData, operatorData); emit Transfer(from, to, amount); } /** * @dev See {ERC20-_approve}. * * Note that accounts cannot have allowance issued by their operators. */ function _approve(address holder, address spender, uint256 value) internal { require(holder != address(0), "ERC777: approve from the zero address"); require(spender != address(0), "ERC777: approve to the zero address"); _allowances[holder][spender] = value; emit Approval(holder, spender, value); } /** * @dev Call from.tokensToSend() if the interface is registered * @param operator address operator requesting the transfer * @param from address token holder address * @param to address recipient address * @param amount uint256 amount of tokens to transfer * @param userData bytes extra information provided by the token holder (if any) * @param operatorData bytes extra information provided by the operator (if any) */ function _callTokensToSend( address operator, address from, address to, uint256 amount, bytes memory userData, bytes memory operatorData ) /* Chaged by SKALE from private */ internal /* End of changed by SKALE */ /* Added by SKALE */ virtual /* End of added by SKALE */ { address implementer = _ERC1820_REGISTRY.getInterfaceImplementer(from, _TOKENS_SENDER_INTERFACE_HASH); if (implementer != address(0)) { IERC777Sender(implementer).tokensToSend(operator, from, to, amount, userData, operatorData); } } /** * @dev Call to.tokensReceived() if the interface is registered. Reverts if the recipient is a contract but * tokensReceived() was not registered for the recipient * @param operator address operator requesting the transfer * @param from address token holder address * @param to address recipient address * @param amount uint256 amount of tokens to transfer * @param userData bytes extra information provided by the token holder (if any) * @param operatorData bytes extra information provided by the operator (if any) * @param requireReceptionAck if true, contract recipients are required to implement ERC777TokensRecipient */ function _callTokensReceived( address operator, address from, address to, uint256 amount, bytes memory userData, bytes memory operatorData, bool requireReceptionAck ) /* Chaged by SKALE from private */ internal /* End of changed by SKALE */ /* Added by SKALE */ virtual /* End of added by SKALE */ { address implementer = _ERC1820_REGISTRY.getInterfaceImplementer(to, _TOKENS_RECIPIENT_INTERFACE_HASH); if (implementer != address(0)) { IERC777Recipient(implementer).tokensReceived(operator, from, to, amount, userData, operatorData); } else if (requireReceptionAck) { require(!to.isContract(), "ERC777: token recipient contract has no implementer for ERC777TokensRecipient"); } } /** * @dev Hook that is called before any token transfer. This includes * calls to {send}, {transfer}, {operatorSend}, minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, ``from``'s `tokenId` will be * transferred to `to`. * - when `from` is zero, `tokenId` will be minted for `to`. * - when `to` is zero, ``from``'s `tokenId` will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer(address operator, address from, address to, uint256 tokenId) internal virtual { } } contract OwnableUpgradeSafe is Initializable, ContextUpgradeSafe { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ function __Ownable_init() internal initializer { __Context_init_unchained(); __Ownable_init_unchained(); } function __Ownable_init_unchained() internal initializer { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), msgSender); } /** * @dev Returns the address of the current owner. */ function owner() public view returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(_owner == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { emit OwnershipTransferred(_owner, address(0)); _owner = address(0); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } uint256[49] private __gap; } abstract contract AccessControlUpgradeSafe is Initializable, ContextUpgradeSafe { function __AccessControl_init() internal initializer { __Context_init_unchained(); __AccessControl_init_unchained(); } function __AccessControl_init_unchained() internal initializer { } using EnumerableSet for EnumerableSet.AddressSet; using Address for address; struct RoleData { EnumerableSet.AddressSet members; bytes32 adminRole; } mapping (bytes32 => RoleData) private _roles; bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00; /** * @dev Emitted when `account` is granted `role`. * * `sender` is the account that originated the contract call, an admin role * bearer except when using {_setupRole}. */ event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender); /** * @dev Emitted when `account` is revoked `role`. * * `sender` is the account that originated the contract call: * - if using `revokeRole`, it is the admin role bearer * - if using `renounceRole`, it is the role bearer (i.e. `account`) */ event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender); /** * @dev Returns `true` if `account` has been granted `role`. */ function hasRole(bytes32 role, address account) public view returns (bool) { return _roles[role].members.contains(account); } /** * @dev Returns the number of accounts that have `role`. Can be used * together with {getRoleMember} to enumerate all bearers of a role. */ function getRoleMemberCount(bytes32 role) public view returns (uint256) { return _roles[role].members.length(); } /** * @dev Returns one of the accounts that have `role`. `index` must be a * value between 0 and {getRoleMemberCount}, non-inclusive. * * Role bearers are not sorted in any particular way, and their ordering may * change at any point. * * WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure * you perform all queries on the same block. See the following * https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post] * for more information. */ function getRoleMember(bytes32 role, uint256 index) public view returns (address) { return _roles[role].members.at(index); } /** * @dev Returns the admin role that controls `role`. See {grantRole} and * {revokeRole}. * * To change a role's admin, use {_setRoleAdmin}. */ function getRoleAdmin(bytes32 role) public view returns (bytes32) { return _roles[role].adminRole; } /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function grantRole(bytes32 role, address account) public virtual { require(hasRole(_roles[role].adminRole, _msgSender()), "AccessControl: sender must be an admin to grant"); _grantRole(role, account); } /** * @dev Revokes `role` from `account`. * * If `account` had been granted `role`, emits a {RoleRevoked} event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function revokeRole(bytes32 role, address account) public virtual { require(hasRole(_roles[role].adminRole, _msgSender()), "AccessControl: sender must be an admin to revoke"); _revokeRole(role, account); } /** * @dev Revokes `role` from the calling account. * * Roles are often managed via {grantRole} and {revokeRole}: this function's * purpose is to provide a mechanism for accounts to lose their privileges * if they are compromised (such as when a trusted device is misplaced). * * If the calling account had been granted `role`, emits a {RoleRevoked} * event. * * Requirements: * * - the caller must be `account`. */ function renounceRole(bytes32 role, address account) public virtual { require(account == _msgSender(), "AccessControl: can only renounce roles for self"); _revokeRole(role, account); } /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. Note that unlike {grantRole}, this function doesn't perform any * checks on the calling account. * * [WARNING] * ==== * This function should only be called from the constructor when setting * up the initial roles for the system. * * Using this function in any other way is effectively circumventing the admin * system imposed by {AccessControl}. * ==== */ function _setupRole(bytes32 role, address account) internal virtual { _grantRole(role, account); } /** * @dev Sets `adminRole` as ``role``'s admin role. */ function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual { _roles[role].adminRole = adminRole; } function _grantRole(bytes32 role, address account) private { if (_roles[role].members.add(account)) { emit RoleGranted(role, account, _msgSender()); } } function _revokeRole(bytes32 role, address account) private { if (_roles[role].members.remove(account)) { emit RoleRevoked(role, account, _msgSender()); } } uint256[49] private __gap; } contract ContractManager is OwnableUpgradeSafe { using StringUtils for string; using Address for address; // mapping of actual smart contracts addresses mapping (bytes32 => address) public contracts; event ContractUpgraded(string contractsName, address contractsAddress); function initialize() external initializer { OwnableUpgradeSafe.__Ownable_init(); } /** * Adds actual contract to mapping of actual contract addresses * @param contractsName - contracts name in skale manager system * @param newContractsAddress - contracts address in skale manager system */ function setContractsAddress(string calldata contractsName, address newContractsAddress) external onlyOwner { // check newContractsAddress is not equal to zero require(newContractsAddress != address(0), "New address is equal zero"); // create hash of contractsName bytes32 contractId = keccak256(abi.encodePacked(contractsName)); // check newContractsAddress is not equal the previous contract's address require(contracts[contractId] != newContractsAddress, "Contract is already added"); require(newContractsAddress.isContract(), "Given contracts address does not contain code"); // add newContractsAddress to mapping of actual contract addresses contracts[contractId] = newContractsAddress; emit ContractUpgraded(contractsName, newContractsAddress); } function getContract(string calldata name) external view returns (address contractAddress) { contractAddress = contracts[keccak256(abi.encodePacked(name))]; require(contractAddress != address(0), name.strConcat(" contract has not been found")); } } contract Permissions is AccessControlUpgradeSafe { using SafeMath for uint; using Address for address; ContractManager public contractManager; /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(_isOwner(), "Caller is not the owner"); _; } modifier onlyAdmin() { require(_isAdmin(msg.sender), "Caller is not an admin"); _; } /** * @dev allow - throws if called by any account and contract other than the owner * or `contractName` contract * @param contractName - human readable name of contract */ modifier allow(string memory contractName) { require( contractManager.contracts(keccak256(abi.encodePacked(contractName))) == msg.sender || _isOwner(), "Message sender is invalid"); _; } modifier allowTwo(string memory contractName1, string memory contractName2) { require( contractManager.contracts(keccak256(abi.encodePacked(contractName1))) == msg.sender || contractManager.contracts(keccak256(abi.encodePacked(contractName2))) == msg.sender || _isOwner(), "Message sender is invalid"); _; } modifier allowThree(string memory contractName1, string memory contractName2, string memory contractName3) { require( contractManager.contracts(keccak256(abi.encodePacked(contractName1))) == msg.sender || contractManager.contracts(keccak256(abi.encodePacked(contractName2))) == msg.sender || contractManager.contracts(keccak256(abi.encodePacked(contractName3))) == msg.sender || _isOwner(), "Message sender is invalid"); _; } function initialize(address contractManagerAddress) public virtual initializer { AccessControlUpgradeSafe.__AccessControl_init(); _setupRole(DEFAULT_ADMIN_ROLE, msg.sender); _setContractManager(contractManagerAddress); } function _isOwner() internal view returns (bool) { return hasRole(DEFAULT_ADMIN_ROLE, msg.sender); } function _isAdmin(address account) internal view returns (bool) { address skaleManagerAddress = contractManager.contracts(keccak256(abi.encodePacked("SkaleManager"))); if (skaleManagerAddress != address(0)) { AccessControlUpgradeSafe skaleManager = AccessControlUpgradeSafe(skaleManagerAddress); return skaleManager.hasRole(keccak256("ADMIN_ROLE"), account) || _isOwner(); } else { return _isOwner(); } } function _setContractManager(address contractManagerAddress) private { require(contractManagerAddress != address(0), "ContractManager address is not set"); require(contractManagerAddress.isContract(), "Address is not contract"); contractManager = ContractManager(contractManagerAddress); } } contract Pricing is Permissions { uint public constant INITIAL_PRICE = 5 * 10**6; uint public price; uint public totalNodes; uint public lastUpdated; function initNodes() external { Nodes nodes = Nodes(contractManager.getContract("Nodes")); totalNodes = nodes.getNumberOnlineNodes(); } function adjustPrice() external { ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); require(now > lastUpdated.add(constantsHolder.COOLDOWN_TIME()), "It's not a time to update a price"); checkAllNodes(); uint load = _getTotalLoad(); uint capacity = _getTotalCapacity(); bool networkIsOverloaded = load.mul(100) > constantsHolder.OPTIMAL_LOAD_PERCENTAGE().mul(capacity); uint loadDiff; if (networkIsOverloaded) { loadDiff = load.mul(100).sub(constantsHolder.OPTIMAL_LOAD_PERCENTAGE().mul(capacity)); } else { loadDiff = constantsHolder.OPTIMAL_LOAD_PERCENTAGE().mul(capacity).sub(load.mul(100)); } uint priceChangeSpeedMultipliedByCapacityAndMinPrice = constantsHolder.ADJUSTMENT_SPEED().mul(loadDiff).mul(price); uint timeSkipped = now.sub(lastUpdated); uint priceChange = priceChangeSpeedMultipliedByCapacityAndMinPrice .mul(timeSkipped) .div(constantsHolder.COOLDOWN_TIME()) .div(capacity) .div(constantsHolder.MIN_PRICE()); if (networkIsOverloaded) { assert(priceChange > 0); price = price.add(priceChange); } else { if (priceChange > price) { price = constantsHolder.MIN_PRICE(); } else { price = price.sub(priceChange); if (price < constantsHolder.MIN_PRICE()) { price = constantsHolder.MIN_PRICE(); } } } lastUpdated = now; } function getTotalLoadPercentage() external view returns (uint) { return _getTotalLoad().mul(100).div(_getTotalCapacity()); } function initialize(address newContractsAddress) public override initializer { Permissions.initialize(newContractsAddress); lastUpdated = now; price = INITIAL_PRICE; } function checkAllNodes() public { Nodes nodes = Nodes(contractManager.getContract("Nodes")); uint numberOfActiveNodes = nodes.getNumberOnlineNodes(); require(totalNodes != numberOfActiveNodes, "No any changes on nodes"); totalNodes = numberOfActiveNodes; } function _getTotalLoad() private view returns (uint) { SchainsInternal schainsInternal = SchainsInternal(contractManager.getContract("SchainsInternal")); uint load = 0; uint numberOfSchains = schainsInternal.numberOfSchains(); for (uint i = 0; i < numberOfSchains; i++) { bytes32 schain = schainsInternal.schainsAtSystem(i); uint numberOfNodesInSchain = schainsInternal.getNumberOfNodesInGroup(schain); uint part = schainsInternal.getSchainsPartOfNode(schain); load = load.add( numberOfNodesInSchain.mul(part) ); } return load; } function _getTotalCapacity() private view returns (uint) { Nodes nodes = Nodes(contractManager.getContract("Nodes")); ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); return nodes.getNumberOnlineNodes().mul(constantsHolder.TOTAL_SPACE_ON_NODE()); } } contract Punisher is Permissions, ILocker { /** * @dev Emitted when a slashing condition occurs. */ event Slash( uint validatorId, uint amount ); /** * @dev Emitted when a forgive condition occurs. */ event Forgive( address wallet, uint amount ); // holder => tokens mapping (address => uint) private _locked; /** * @dev Executes slashing on a validator and its delegations by an `amount` * of tokens. Currently, SkaleDKG is the only service allowed to execute * slashing. * * Emits a Slash event. * * @param validatorId uint validator to be slashed * @param amount uint slashed amount */ function slash(uint validatorId, uint amount) external allow("SkaleDKG") { ValidatorService validatorService = ValidatorService(contractManager.getContract("ValidatorService")); DelegationController delegationController = DelegationController( contractManager.getContract("DelegationController")); require(validatorService.validatorExists(validatorId), "Validator does not exist"); delegationController.confiscate(validatorId, amount); emit Slash(validatorId, amount); } /** * @dev Allows the Owner to forgive a slashing condition. * * Emits a Forgive event. * * @param holder address of the slashed * @param amount uint amount to be forgiven */ function forgive(address holder, uint amount) external onlyAdmin { DelegationController delegationController = DelegationController( contractManager.getContract("DelegationController")); require(!delegationController.hasUnprocessedSlashes(holder), "Not all slashes were calculated"); if (amount > _locked[holder]) { delete _locked[holder]; } else { _locked[holder] = _locked[holder].sub(amount); } emit Forgive(holder, amount); } /** * @dev See ILocker-getAndUpdateLockedAmount */ function getAndUpdateLockedAmount(address wallet) external override returns (uint) { return _getAndUpdateLockedAmount(wallet); } /** * @dev See ILocker-getAndUpdateForbiddenForDelegationAmount */ function getAndUpdateForbiddenForDelegationAmount(address wallet) external override returns (uint) { return _getAndUpdateLockedAmount(wallet); } function handleSlash(address holder, uint amount) external allow("DelegationController") { _locked[holder] = _locked[holder].add(amount); } function initialize(address contractManagerAddress) public override initializer { Permissions.initialize(contractManagerAddress); } // private function _getAndUpdateLockedAmount(address wallet) private returns (uint) { DelegationController delegationController = DelegationController( contractManager.getContract("DelegationController")); delegationController.processAllSlashes(wallet); return _locked[wallet]; } } contract Schains is Permissions { using StringUtils for string; using StringUtils for uint; struct SchainParameters { uint lifetime; uint8 typeOfSchain; uint16 nonce; string name; } // informs that Schain is created event SchainCreated( string name, address owner, uint partOfNode, uint lifetime, uint numberOfNodes, uint deposit, uint16 nonce, bytes32 schainId, uint time, uint gasSpend ); event SchainDeleted( address owner, string name, bytes32 indexed schainId ); event NodeRotated( bytes32 schainId, uint oldNode, uint newNode ); event NodeAdded( bytes32 schainId, uint newNode ); // informs that Schain based on some Nodes event SchainNodes( string name, bytes32 schainId, uint[] nodesInGroup, uint time, uint gasSpend ); bytes32 public constant SCHAIN_CREATOR_ROLE = keccak256("SCHAIN_CREATOR_ROLE"); /** * @dev addSchain - create Schain in the system * function could be run only by executor * @param from - owner of Schain * @param deposit - received amoung of SKL * @param data - Schain's data */ function addSchain(address from, uint deposit, bytes calldata data) external allow("SkaleManager") { SchainParameters memory schainParameters = _fallbackSchainParametersDataConverter(data); ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); uint schainCreationTimeStamp = constantsHolder.schainCreationTimeStamp(); uint minSchainLifetime = constantsHolder.minimalSchainLifetime(); require(now >= schainCreationTimeStamp, "It is not a time for creating Schain"); require( schainParameters.lifetime >= minSchainLifetime, "Minimal schain lifetime should be satisfied" ); require( getSchainPrice(schainParameters.typeOfSchain, schainParameters.lifetime) <= deposit, "Not enough money to create Schain"); _addSchain(from, deposit, schainParameters); } function addSchainByFoundation( uint lifetime, uint8 typeOfSchain, uint16 nonce, string calldata name ) external { require(hasRole(SCHAIN_CREATOR_ROLE, msg.sender), "Sender is not authorized to create schian"); SchainParameters memory schainParameters = SchainParameters({ lifetime: lifetime, typeOfSchain: typeOfSchain, nonce: nonce, name: name }); _addSchain(msg.sender, 0, schainParameters); } /** * @dev deleteSchain - removes Schain from the system * function could be run only by executor * @param from - owner of Schain * @param name - Schain name */ function deleteSchain(address from, string calldata name) external allow("SkaleManager") { NodeRotation nodeRotation = NodeRotation(contractManager.getContract("NodeRotation")); SchainsInternal schainsInternal = SchainsInternal(contractManager.getContract("SchainsInternal")); bytes32 schainId = keccak256(abi.encodePacked(name)); require( schainsInternal.isOwnerAddress(from, schainId), "Message sender is not an owner of Schain" ); address nodesAddress = contractManager.getContract("Nodes"); // removes Schain from Nodes uint[] memory nodesInGroup = schainsInternal.getNodesInGroup(schainId); uint8 partOfNode = schainsInternal.getSchainsPartOfNode(schainId); for (uint i = 0; i < nodesInGroup.length; i++) { uint schainIndex = schainsInternal.findSchainAtSchainsForNode( nodesInGroup[i], schainId ); if (schainsInternal.checkHoleForSchain(schainId, i)) { continue; } require( schainIndex < schainsInternal.getLengthOfSchainsForNode(nodesInGroup[i]), "Some Node does not contain given Schain"); schainsInternal.removeNodeFromSchain(nodesInGroup[i], schainId); schainsInternal.removeNodeFromExceptions(schainId, nodesInGroup[i]); if (!Nodes(nodesAddress).isNodeLeft(nodesInGroup[i])) { this.addSpace(nodesInGroup[i], partOfNode); } } schainsInternal.deleteGroup(schainId); schainsInternal.removeSchain(schainId, from); schainsInternal.removeHolesForSchain(schainId); nodeRotation.removeRotation(schainId); emit SchainDeleted(from, name, schainId); } function deleteSchainByRoot(string calldata name) external allow("SkaleManager") { NodeRotation nodeRotation = NodeRotation(contractManager.getContract("NodeRotation")); bytes32 schainId = keccak256(abi.encodePacked(name)); SchainsInternal schainsInternal = SchainsInternal( contractManager.getContract("SchainsInternal")); require(schainsInternal.isSchainExist(schainId), "Schain does not exist"); // removes Schain from Nodes uint[] memory nodesInGroup = schainsInternal.getNodesInGroup(schainId); uint8 partOfNode = schainsInternal.getSchainsPartOfNode(schainId); for (uint i = 0; i < nodesInGroup.length; i++) { uint schainIndex = schainsInternal.findSchainAtSchainsForNode( nodesInGroup[i], schainId ); if (schainsInternal.checkHoleForSchain(schainId, i)) { continue; } require( schainIndex < schainsInternal.getLengthOfSchainsForNode(nodesInGroup[i]), "Some Node does not contain given Schain"); schainsInternal.removeNodeFromSchain(nodesInGroup[i], schainId); schainsInternal.removeNodeFromExceptions(schainId, nodesInGroup[i]); this.addSpace(nodesInGroup[i], partOfNode); } schainsInternal.deleteGroup(schainId); address from = schainsInternal.getSchainOwner(schainId); schainsInternal.removeSchain(schainId, from); schainsInternal.removeHolesForSchain(schainId); nodeRotation.removeRotation(schainId); emit SchainDeleted(from, name, schainId); } function restartSchainCreation(string calldata name) external allow("SkaleManager") { NodeRotation nodeRotation = NodeRotation(contractManager.getContract("NodeRotation")); bytes32 schainId = keccak256(abi.encodePacked(name)); ISkaleDKG skaleDKG = ISkaleDKG(contractManager.getContract("SkaleDKG")); require(!skaleDKG.isLastDKGSuccesful(schainId), "DKG success"); SchainsInternal schainsInternal = SchainsInternal( contractManager.getContract("SchainsInternal")); require(schainsInternal.isAnyFreeNode(schainId), "No any free Nodes for rotation"); uint newNodeIndex = nodeRotation.selectNodeToGroup(schainId); skaleDKG.openChannel(schainId); emit NodeAdded(schainId, newNodeIndex); } /** * @dev addSpace - return occupied space to Node * @param nodeIndex - index of Node at common array of Nodes * @param partOfNode - divisor of given type of Schain */ function addSpace(uint nodeIndex, uint8 partOfNode) external allowTwo("Schains", "NodeRotation") { Nodes nodes = Nodes(contractManager.getContract("Nodes")); nodes.addSpaceToNode(nodeIndex, partOfNode); } /** * @dev verifySignature - verify signature which create Group by Groups BLS master public key * @param signatureA - first part of BLS signature * @param signatureB - second part of BLS signature * @param hash - hashed message * @param counter - smallest sub from square * @param hashA - first part of hashed message * @param hashB - second part of hashed message * @param schainName - name of the Schain * @return true - if correct, false - if not */ function verifySchainSignature( uint signatureA, uint signatureB, bytes32 hash, uint counter, uint hashA, uint hashB, string calldata schainName ) external view returns (bool) { SkaleVerifier skaleVerifier = SkaleVerifier(contractManager.getContract("SkaleVerifier")); G2Operations.G2Point memory publicKey = KeyStorage( contractManager.getContract("KeyStorage") ).getCommonPublicKey( keccak256(abi.encodePacked(schainName)) ); return skaleVerifier.verify( Fp2Operations.Fp2Point({ a: signatureA, b: signatureB }), hash, counter, hashA, hashB, publicKey ); } function initialize(address newContractsAddress) public override initializer { Permissions.initialize(newContractsAddress); } /** * @dev getSchainPrice - returns current price for given Schain * @param typeOfSchain - type of Schain * @param lifetime - lifetime of Schain * @return current price for given Schain */ function getSchainPrice(uint typeOfSchain, uint lifetime) public view returns (uint) { ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); uint nodeDeposit = constantsHolder.NODE_DEPOSIT(); uint numberOfNodes; uint8 divisor; (numberOfNodes, divisor) = getNodesDataFromTypeOfSchain(typeOfSchain); if (divisor == 0) { return 1e18; } else { uint up = nodeDeposit.mul(numberOfNodes.mul(lifetime.mul(2))); uint down = uint( uint(constantsHolder.SMALL_DIVISOR()) .mul(uint(constantsHolder.SECONDS_TO_YEAR())) .div(divisor) ); return up.div(down); } } /** * @dev getNodesDataFromTypeOfSchain - returns number if Nodes * and part of Node which needed to this Schain * @param typeOfSchain - type of Schain * @return numberOfNodes - number of Nodes needed to this Schain * @return partOfNode - divisor of given type of Schain */ function getNodesDataFromTypeOfSchain(uint typeOfSchain) public view returns (uint numberOfNodes, uint8 partOfNode) { ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); numberOfNodes = constantsHolder.NUMBER_OF_NODES_FOR_SCHAIN(); if (typeOfSchain == 1) { partOfNode = constantsHolder.SMALL_DIVISOR() / constantsHolder.SMALL_DIVISOR(); } else if (typeOfSchain == 2) { partOfNode = constantsHolder.SMALL_DIVISOR() / constantsHolder.MEDIUM_DIVISOR(); } else if (typeOfSchain == 3) { partOfNode = constantsHolder.SMALL_DIVISOR() / constantsHolder.LARGE_DIVISOR(); } else if (typeOfSchain == 4) { partOfNode = 0; numberOfNodes = constantsHolder.NUMBER_OF_NODES_FOR_TEST_SCHAIN(); } else if (typeOfSchain == 5) { partOfNode = constantsHolder.SMALL_DIVISOR() / constantsHolder.MEDIUM_TEST_DIVISOR(); numberOfNodes = constantsHolder.NUMBER_OF_NODES_FOR_MEDIUM_TEST_SCHAIN(); } else { revert("Bad schain type"); } } function _initializeSchainInSchainsInternal( string memory name, address from, uint deposit, uint lifetime) private { address dataAddress = contractManager.getContract("SchainsInternal"); require(SchainsInternal(dataAddress).isSchainNameAvailable(name), "Schain name is not available"); // initialize Schain SchainsInternal(dataAddress).initializeSchain( name, from, lifetime, deposit); SchainsInternal(dataAddress).setSchainIndex(keccak256(abi.encodePacked(name)), from); } /** * @dev fallbackSchainParameterDataConverter - converts data from bytes to normal parameters * @param data - concatenated parameters * @return schainParameters Parsed lifetime, typeOfSchain, nonce and name */ function _fallbackSchainParametersDataConverter(bytes memory data) private pure returns (SchainParameters memory schainParameters) { (schainParameters.lifetime, schainParameters.typeOfSchain, schainParameters.nonce, schainParameters.name) = abi.decode(data, (uint, uint8, uint16, string)); } /** * @dev _createGroupForSchain - creates Group for Schain * @param schainName - name of Schain * @param schainId - hash by name of Schain * @param numberOfNodes - number of Nodes needed for this Schain * @param partOfNode - divisor of given type of Schain */ function _createGroupForSchain( string memory schainName, bytes32 schainId, uint numberOfNodes, uint8 partOfNode ) private { SchainsInternal schainsInternal = SchainsInternal(contractManager.getContract("SchainsInternal")); uint[] memory nodesInGroup = schainsInternal.createGroupForSchain(schainId, numberOfNodes, partOfNode); ISkaleDKG(contractManager.getContract("SkaleDKG")).openChannel(schainId); emit SchainNodes( schainName, schainId, nodesInGroup, block.timestamp, gasleft()); } /** * @dev _addSchain - create Schain in the system * function could be run only by executor * @param from - owner of Schain * @param deposit - received amoung of SKL * @param schainParameters - Schain's data */ function _addSchain(address from, uint deposit, SchainParameters memory schainParameters) private { uint numberOfNodes; uint8 partOfNode; require(schainParameters.typeOfSchain <= 5, "Invalid type of Schain"); //initialize Schain _initializeSchainInSchainsInternal( schainParameters.name, from, deposit, schainParameters.lifetime); // create a group for Schain (numberOfNodes, partOfNode) = getNodesDataFromTypeOfSchain(schainParameters.typeOfSchain); _createGroupForSchain( schainParameters.name, keccak256(abi.encodePacked(schainParameters.name)), numberOfNodes, partOfNode ); emit SchainCreated( schainParameters.name, from, partOfNode, schainParameters.lifetime, numberOfNodes, deposit, schainParameters.nonce, keccak256(abi.encodePacked(schainParameters.name)), block.timestamp, gasleft()); } } contract SchainsInternal is Permissions { struct Schain { string name; address owner; uint indexInOwnerList; uint8 partOfNode; uint lifetime; uint startDate; uint startBlock; uint deposit; uint64 index; } // mapping which contain all schains mapping (bytes32 => Schain) public schains; mapping (bytes32 => bool) public isSchainActive; mapping (bytes32 => uint[]) public schainsGroups; mapping (bytes32 => mapping (uint => bool)) private _exceptionsForGroups; // mapping shows schains by owner's address mapping (address => bytes32[]) public schainIndexes; // mapping shows schains which Node composed in mapping (uint => bytes32[]) public schainsForNodes; mapping (uint => uint[]) public holesForNodes; mapping (bytes32 => uint[]) public holesForSchains; // array which contain all schains bytes32[] public schainsAtSystem; uint64 public numberOfSchains; // total resources that schains occupied uint public sumOfSchainsResources; mapping (bytes32 => bool) public usedSchainNames; /** * @dev initializeSchain - initializes Schain * function could be run only by executor * @param name - SChain name * @param from - Schain owner * @param lifetime - initial lifetime of Schain * @param deposit - given amount of SKL */ function initializeSchain( string calldata name, address from, uint lifetime, uint deposit) external allow("Schains") { bytes32 schainId = keccak256(abi.encodePacked(name)); schains[schainId].name = name; schains[schainId].owner = from; schains[schainId].startDate = block.timestamp; schains[schainId].startBlock = block.number; schains[schainId].lifetime = lifetime; schains[schainId].deposit = deposit; schains[schainId].index = numberOfSchains; isSchainActive[schainId] = true; numberOfSchains++; schainsAtSystem.push(schainId); usedSchainNames[schainId] = true; } function createGroupForSchain( bytes32 schainId, uint numberOfNodes, uint8 partOfNode ) external allow("Schains") returns (uint[] memory) { ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); schains[schainId].partOfNode = partOfNode; if (partOfNode > 0) { sumOfSchainsResources = sumOfSchainsResources.add( numberOfNodes.mul(constantsHolder.TOTAL_SPACE_ON_NODE()).div(partOfNode) ); } return _generateGroup(schainId, numberOfNodes); } /** * @dev setSchainIndex - adds Schain's hash to owner * function could be run only by executor * @param schainId - hash by Schain name * @param from - Schain owner */ function setSchainIndex(bytes32 schainId, address from) external allow("Schains") { schains[schainId].indexInOwnerList = schainIndexes[from].length; schainIndexes[from].push(schainId); } /** * @dev changeLifetime - changes Lifetime for Schain * function could be run only by executor * @param schainId - hash by Schain name * @param lifetime - time which would be added to lifetime of Schain * @param deposit - amount of SKL which payed for this time */ function changeLifetime(bytes32 schainId, uint lifetime, uint deposit) external allow("Schains") { schains[schainId].deposit = schains[schainId].deposit.add(deposit); schains[schainId].lifetime = schains[schainId].lifetime.add(lifetime); } /** * @dev removeSchain - removes Schain from the system * function could be run only by executor * @param schainId - hash by Schain name * @param from - owner of Schain */ function removeSchain(bytes32 schainId, address from) external allow("Schains") { isSchainActive[schainId] = false; uint length = schainIndexes[from].length; uint index = schains[schainId].indexInOwnerList; if (index != length.sub(1)) { bytes32 lastSchainId = schainIndexes[from][length.sub(1)]; schains[lastSchainId].indexInOwnerList = index; schainIndexes[from][index] = lastSchainId; } schainIndexes[from].pop(); // TODO: // optimize for (uint i = 0; i + 1 < schainsAtSystem.length; i++) { if (schainsAtSystem[i] == schainId) { schainsAtSystem[i] = schainsAtSystem[schainsAtSystem.length.sub(1)]; break; } } schainsAtSystem.pop(); delete schains[schainId]; numberOfSchains--; } function removeNodeFromSchain( uint nodeIndex, bytes32 schainHash ) external allowThree("NodeRotation", "SkaleDKG", "Schains") { uint indexOfNode = _findNode(schainHash, nodeIndex); uint indexOfLastNode = schainsGroups[schainHash].length.sub(1); if (indexOfNode == indexOfLastNode) { schainsGroups[schainHash].pop(); } else { delete schainsGroups[schainHash][indexOfNode]; if (holesForSchains[schainHash].length > 0 && holesForSchains[schainHash][0] > indexOfNode) { uint hole = holesForSchains[schainHash][0]; holesForSchains[schainHash][0] = indexOfNode; holesForSchains[schainHash].push(hole); } else { holesForSchains[schainHash].push(indexOfNode); } } uint schainId = findSchainAtSchainsForNode(nodeIndex, schainHash); removeSchainForNode(nodeIndex, schainId); } function removeNodeFromExceptions(bytes32 schainHash, uint nodeIndex) external allow("Schains") { _exceptionsForGroups[schainHash][nodeIndex] = false; } /** * @dev deleteGroup - delete Group from Data contract * function could be run only by executor * @param schainId - Groups identifier */ function deleteGroup(bytes32 schainId) external allow("Schains") { // delete channel ISkaleDKG skaleDKG = ISkaleDKG(contractManager.getContract("SkaleDKG")); delete schainsGroups[schainId]; if (skaleDKG.isChannelOpened(schainId)) { skaleDKG.deleteChannel(schainId); } } /** * @dev setException - sets a Node like exception * function could be run only by executor * @param schainId - Groups identifier * @param nodeIndex - index of Node which would be notes like exception */ function setException(bytes32 schainId, uint nodeIndex) external allowTwo("Schains", "NodeRotation") { _exceptionsForGroups[schainId][nodeIndex] = true; } /** * @dev setNodeInGroup - adds Node to Group * function could be run only by executor * @param schainId - Groups * @param nodeIndex - index of Node which would be added to the Group */ function setNodeInGroup(bytes32 schainId, uint nodeIndex) external allowTwo("Schains", "NodeRotation") { if (holesForSchains[schainId].length == 0) { schainsGroups[schainId].push(nodeIndex); } else { schainsGroups[schainId][holesForSchains[schainId][0]] = nodeIndex; uint min = uint(-1); uint index = 0; for (uint i = 1; i < holesForSchains[schainId].length; i++) { if (min > holesForSchains[schainId][i]) { min = holesForSchains[schainId][i]; index = i; } } if (min == uint(-1)) { delete holesForSchains[schainId]; } else { holesForSchains[schainId][0] = min; holesForSchains[schainId][index] = holesForSchains[schainId][holesForSchains[schainId].length - 1]; holesForSchains[schainId].pop(); } } } function removeHolesForSchain(bytes32 schainHash) external allow("Schains") { delete holesForSchains[schainHash]; } /** * @dev getSchains - gets all Schains at the system * @return array of hashes by Schain names */ function getSchains() external view returns (bytes32[] memory) { return schainsAtSystem; } /** * @dev getSchainsPartOfNode - gets occupied space for given Schain * @param schainId - hash by Schain name * @return occupied space */ function getSchainsPartOfNode(bytes32 schainId) external view returns (uint8) { return schains[schainId].partOfNode; } /** * @dev getSchainListSize - gets number of created Schains at the system by owner * @param from - owner of Schain * return number of Schains */ function getSchainListSize(address from) external view returns (uint) { return schainIndexes[from].length; } /** * @dev getSchainIdsByAddress - gets array of hashes by Schain names which owned by `from` * @param from - owner of some Schains * @return array of hashes by Schain names */ function getSchainIdsByAddress(address from) external view returns (bytes32[] memory) { return schainIndexes[from]; } /** * @dev getSchainIdsForNode - returns array of hashes by Schain names, * which given Node composed * @param nodeIndex - index of Node * @return array of hashes by Schain names */ function getSchainIdsForNode(uint nodeIndex) external view returns (bytes32[] memory) { return schainsForNodes[nodeIndex]; } function getSchainOwner(bytes32 schainId) external view returns (address) { return schains[schainId].owner; } /** * @dev isSchainNameAvailable - checks is given name available * Need to delete - copy of web3.utils.soliditySha3 * @param name - possible new name of Schain * @return if available - true, else - false */ function isSchainNameAvailable(string calldata name) external view returns (bool) { bytes32 schainId = keccak256(abi.encodePacked(name)); return schains[schainId].owner == address(0) && !usedSchainNames[schainId]; } /** * @dev isTimeExpired - checks is Schain lifetime expired * @param schainId - hash by Schain name * @return if expired - true, else - false */ function isTimeExpired(bytes32 schainId) external view returns (bool) { return uint(schains[schainId].startDate).add(schains[schainId].lifetime) < block.timestamp; } /** * @dev isOwnerAddress - checks is `from` - owner of `schainId` Schain * @param from - owner of Schain * @param schainId - hash by Schain name * @return if owner - true, else - false */ function isOwnerAddress(address from, bytes32 schainId) external view returns (bool) { return schains[schainId].owner == from; } function isSchainExist(bytes32 schainId) external view returns (bool) { return keccak256(abi.encodePacked(schains[schainId].name)) != keccak256(abi.encodePacked("")); } function getSchainName(bytes32 schainId) external view returns (string memory) { return schains[schainId].name; } function getActiveSchain(uint nodeIndex) external view returns (bytes32) { for (uint i = schainsForNodes[nodeIndex].length; i > 0; i--) { if (schainsForNodes[nodeIndex][i - 1] != bytes32(0)) { return schainsForNodes[nodeIndex][i - 1]; } } return bytes32(0); } function getActiveSchains(uint nodeIndex) external view returns (bytes32[] memory activeSchains) { uint activeAmount = 0; for (uint i = 0; i < schainsForNodes[nodeIndex].length; i++) { if (schainsForNodes[nodeIndex][i] != bytes32(0)) { activeAmount++; } } uint cursor = 0; activeSchains = new bytes32[](activeAmount); for (uint i = schainsForNodes[nodeIndex].length; i > 0; i--) { if (schainsForNodes[nodeIndex][i - 1] != bytes32(0)) { activeSchains[cursor++] = schainsForNodes[nodeIndex][i - 1]; } } } /** * @dev getNumberOfNodesInGroup - shows number of Nodes in Group * @param schainId - Groups identifier * @return number of Nodes in Group */ function getNumberOfNodesInGroup(bytes32 schainId) external view returns (uint) { return schainsGroups[schainId].length; } /** * @dev getNodesInGroup - shows Nodes in Group * @param schainId - Groups identifier * @return array of indexes of Nodes in Group */ function getNodesInGroup(bytes32 schainId) external view returns (uint[] memory) { return schainsGroups[schainId]; } /** * @dev getNodeIndexInGroup - looks for Node in Group * @param schainId - Groups identifier * @param nodeId - Nodes identifier * @return index of Node in Group */ function getNodeIndexInGroup(bytes32 schainId, uint nodeId) external view returns (uint) { for (uint index = 0; index < schainsGroups[schainId].length; index++) { if (schainsGroups[schainId][index] == nodeId) { return index; } } return schainsGroups[schainId].length; } function isAnyFreeNode(bytes32 schainId) external view returns (bool) { Nodes nodes = Nodes(contractManager.getContract("Nodes")); uint8 space = schains[schainId].partOfNode; uint[] memory nodesWithFreeSpace = nodes.getNodesWithFreeSpace(space); for (uint i = 0; i < nodesWithFreeSpace.length; i++) { if (_isCorrespond(schainId, nodesWithFreeSpace[i])) { return true; } } return false; } function checkException(bytes32 schainId, uint nodeIndex) external view returns (bool) { return _exceptionsForGroups[schainId][nodeIndex]; } function checkHoleForSchain(bytes32 schainHash, uint indexOfNode) external view returns (bool) { for (uint i = 0; i < holesForSchains[schainHash].length; i++) { if (holesForSchains[schainHash][i] == indexOfNode) { return true; } } return false; } function initialize(address newContractsAddress) public override initializer { Permissions.initialize(newContractsAddress); numberOfSchains = 0; sumOfSchainsResources = 0; } /** * @dev addSchainForNode - adds Schain hash to Node * function could be run only by executor * @param nodeIndex - index of Node * @param schainId - hash by Schain name */ function addSchainForNode(uint nodeIndex, bytes32 schainId) public allowTwo("Schains", "NodeRotation") { if (holesForNodes[nodeIndex].length == 0) { schainsForNodes[nodeIndex].push(schainId); } else { schainsForNodes[nodeIndex][holesForNodes[nodeIndex][0]] = schainId; uint min = uint(-1); uint index = 0; for (uint i = 1; i < holesForNodes[nodeIndex].length; i++) { if (min > holesForNodes[nodeIndex][i]) { min = holesForNodes[nodeIndex][i]; index = i; } } if (min == uint(-1)) { delete holesForNodes[nodeIndex]; } else { holesForNodes[nodeIndex][0] = min; holesForNodes[nodeIndex][index] = holesForNodes[nodeIndex][holesForNodes[nodeIndex].length - 1]; holesForNodes[nodeIndex].pop(); } } } /** * @dev removesSchainForNode - clean given Node of Schain * function could be run only by executor * @param nodeIndex - index of Node * @param schainIndex - index of Schain in schainsForNodes array by this Node */ function removeSchainForNode(uint nodeIndex, uint schainIndex) public allowThree("NodeRotation", "SkaleDKG", "Schains") { uint length = schainsForNodes[nodeIndex].length; if (schainIndex == length.sub(1)) { schainsForNodes[nodeIndex].pop(); } else { schainsForNodes[nodeIndex][schainIndex] = bytes32(0); if (holesForNodes[nodeIndex].length > 0 && holesForNodes[nodeIndex][0] > schainIndex) { uint hole = holesForNodes[nodeIndex][0]; holesForNodes[nodeIndex][0] = schainIndex; holesForNodes[nodeIndex].push(hole); } else { holesForNodes[nodeIndex].push(schainIndex); } } } /** * @dev getLengthOfSchainsForNode - returns number of Schains which contain given Node * @param nodeIndex - index of Node * @return number of Schains */ function getLengthOfSchainsForNode(uint nodeIndex) public view returns (uint) { return schainsForNodes[nodeIndex].length; } /** * @dev findSchainAtSchainsForNode - finds index of Schain at schainsForNode array * @param nodeIndex - index of Node at common array of Nodes * @param schainId - hash of name of Schain * @return index of Schain at schainsForNode array */ function findSchainAtSchainsForNode(uint nodeIndex, bytes32 schainId) public view returns (uint) { uint length = getLengthOfSchainsForNode(nodeIndex); for (uint i = 0; i < length; i++) { if (schainsForNodes[nodeIndex][i] == schainId) { return i; } } return length; } function isEnoughNodes(bytes32 schainId) public view returns (uint[] memory result) { Nodes nodes = Nodes(contractManager.getContract("Nodes")); uint8 space = schains[schainId].partOfNode; uint[] memory nodesWithFreeSpace = nodes.getNodesWithFreeSpace(space); uint counter = 0; for (uint i = 0; i < nodesWithFreeSpace.length; i++) { if (!_isCorrespond(schainId, nodesWithFreeSpace[i])) { counter++; } } if (counter < nodesWithFreeSpace.length) { result = new uint[](nodesWithFreeSpace.length.sub(counter)); counter = 0; for (uint i = 0; i < nodesWithFreeSpace.length; i++) { if (_isCorrespond(schainId, nodesWithFreeSpace[i])) { result[counter] = nodesWithFreeSpace[i]; counter++; } } } } /** * @dev _generateGroup - generates Group for Schain * @param schainId - index of Group */ function _generateGroup(bytes32 schainId, uint numberOfNodes) private returns (uint[] memory nodesInGroup) { Nodes nodes = Nodes(contractManager.getContract("Nodes")); uint8 space = schains[schainId].partOfNode; nodesInGroup = new uint[](numberOfNodes); uint[] memory possibleNodes = isEnoughNodes(schainId); require(possibleNodes.length >= nodesInGroup.length, "Not enough nodes to create Schain"); uint ignoringTail = 0; uint random = uint(keccak256(abi.encodePacked(uint(blockhash(block.number.sub(1))), schainId))); for (uint i = 0; i < nodesInGroup.length; ++i) { uint index = random % (possibleNodes.length.sub(ignoringTail)); uint node = possibleNodes[index]; nodesInGroup[i] = node; _swap(possibleNodes, index, possibleNodes.length.sub(ignoringTail).sub(1)); ++ignoringTail; _exceptionsForGroups[schainId][node] = true; addSchainForNode(node, schainId); require(nodes.removeSpaceFromNode(node, space), "Could not remove space from Node"); } // set generated group schainsGroups[schainId] = nodesInGroup; } function _isCorrespond(bytes32 schainId, uint nodeIndex) private view returns (bool) { Nodes nodes = Nodes(contractManager.getContract("Nodes")); return !_exceptionsForGroups[schainId][nodeIndex] && nodes.isNodeActive(nodeIndex); } function _swap(uint[] memory array, uint index1, uint index2) private pure { uint buffer = array[index1]; array[index1] = array[index2]; array[index2] = buffer; } /** * @dev findNode - find local index of Node in Schain * @param schainId - Groups identifier * @param nodeIndex - global index of Node * @return local index of Node in Schain */ function _findNode(bytes32 schainId, uint nodeIndex) private view returns (uint) { uint[] memory nodesInGroup = schainsGroups[schainId]; uint index; for (index = 0; index < nodesInGroup.length; index++) { if (nodesInGroup[index] == nodeIndex) { return index; } } return index; } } contract SkaleDKG is Permissions, ISkaleDKG { using Fp2Operations for Fp2Operations.Fp2Point; using G2Operations for G2Operations.G2Point; struct Channel { bool active; uint n; uint startedBlockTimestamp; uint startedBlock; } struct ProcessDKG { uint numberOfBroadcasted; uint numberOfCompleted; bool[] broadcasted; bool[] completed; } struct ComplaintData { uint nodeToComplaint; uint fromNodeToComplaint; uint startComplaintBlockTimestamp; } struct KeyShare { bytes32[2] publicKey; bytes32 share; } uint public constant COMPLAINT_TIMELIMIT = 1800; mapping(bytes32 => Channel) public channels; mapping(bytes32 => uint) public lastSuccesfulDKG; mapping(bytes32 => ProcessDKG) public dkgProcess; mapping(bytes32 => ComplaintData) public complaints; mapping(bytes32 => uint) public startAlrightTimestamp; mapping(bytes32 => mapping(uint => bytes32)) public hashedData; event ChannelOpened(bytes32 groupIndex); event ChannelClosed(bytes32 groupIndex); event BroadcastAndKeyShare( bytes32 indexed groupIndex, uint indexed fromNode, G2Operations.G2Point[] verificationVector, KeyShare[] secretKeyContribution ); event AllDataReceived(bytes32 indexed groupIndex, uint nodeIndex); event SuccessfulDKG(bytes32 indexed groupIndex); event BadGuy(uint nodeIndex); event FailedDKG(bytes32 indexed groupIndex); event ComplaintSent(bytes32 indexed groupIndex, uint indexed fromNodeIndex, uint indexed toNodeIndex); event NewGuy(uint nodeIndex); event ComplaintError(string error); modifier correctGroup(bytes32 groupIndex) { require(channels[groupIndex].active, "Group is not created"); _; } modifier correctGroupWithoutRevert(bytes32 groupIndex) { if (!channels[groupIndex].active) { emit ComplaintError("Group is not created"); } else { _; } } modifier correctNode(bytes32 groupIndex, uint nodeIndex) { uint index = _nodeIndexInSchain(groupIndex, nodeIndex); require( index < channels[groupIndex].n, "Node is not in this group"); _; } modifier correctNodeWithoutRevert(bytes32 groupIndex, uint nodeIndex) { uint index = _nodeIndexInSchain(groupIndex, nodeIndex); if (index >= channels[groupIndex].n) { emit ComplaintError("Node is not in this group"); } else { _; } } function openChannel(bytes32 groupIndex) external override allowTwo("Schains","NodeRotation") { _openChannel(groupIndex); } function deleteChannel(bytes32 groupIndex) external override allow("SchainsInternal") { require(channels[groupIndex].active, "Channel is not created"); delete channels[groupIndex]; delete dkgProcess[groupIndex]; delete complaints[groupIndex]; KeyStorage(contractManager.getContract("KeyStorage")).deleteKey(groupIndex); } function broadcast( bytes32 groupIndex, uint nodeIndex, G2Operations.G2Point[] calldata verificationVector, KeyShare[] calldata secretKeyContribution ) external correctGroup(groupIndex) { require(_isNodeByMessageSender(nodeIndex, msg.sender), "Node does not exist for message sender"); uint n = channels[groupIndex].n; require(verificationVector.length == getT(n), "Incorrect number of verification vectors"); require( secretKeyContribution.length == n, "Incorrect number of secret key shares" ); uint index = _nodeIndexInSchain(groupIndex, nodeIndex); require(index < channels[groupIndex].n, "Node is not in this group"); require(!dkgProcess[groupIndex].broadcasted[index], "This node has already broadcasted"); dkgProcess[groupIndex].broadcasted[index] = true; dkgProcess[groupIndex].numberOfBroadcasted++; if (dkgProcess[groupIndex].numberOfBroadcasted == channels[groupIndex].n) { startAlrightTimestamp[groupIndex] = now; } hashedData[groupIndex][index] = _hashData(secretKeyContribution, verificationVector); KeyStorage keyStorage = KeyStorage(contractManager.getContract("KeyStorage")); keyStorage.adding(groupIndex, verificationVector[0]); emit BroadcastAndKeyShare( groupIndex, nodeIndex, verificationVector, secretKeyContribution ); } function complaint(bytes32 groupIndex, uint fromNodeIndex, uint toNodeIndex) external correctGroupWithoutRevert(groupIndex) correctNode(groupIndex, fromNodeIndex) correctNodeWithoutRevert(groupIndex, toNodeIndex) { require(_isNodeByMessageSender(fromNodeIndex, msg.sender), "Node does not exist for message sender"); require(isNodeBroadcasted(groupIndex, fromNodeIndex), "Node has not broadcasted"); bool broadcasted = isNodeBroadcasted(groupIndex, toNodeIndex); if (broadcasted) { _handleComplaintWhenBroadcasted(groupIndex, fromNodeIndex, toNodeIndex); return; } else { // not broadcasted in 30 min if (channels[groupIndex].startedBlockTimestamp.add(COMPLAINT_TIMELIMIT) <= block.timestamp) { _finalizeSlashing(groupIndex, toNodeIndex); return; } emit ComplaintError("Complaint sent too early"); return; } } function response( bytes32 groupIndex, uint fromNodeIndex, uint secretNumber, G2Operations.G2Point calldata multipliedShare, G2Operations.G2Point[] calldata verificationVector, KeyShare[] calldata secretKeyContribution ) external correctGroup(groupIndex) { uint indexOnSchain = _nodeIndexInSchain(groupIndex, fromNodeIndex); require(indexOnSchain < channels[groupIndex].n, "Node is not in this group"); require(complaints[groupIndex].nodeToComplaint == fromNodeIndex, "Not this Node"); require(_isNodeByMessageSender(fromNodeIndex, msg.sender), "Node does not exist for message sender"); require( hashedData[groupIndex][indexOnSchain] == _hashData(secretKeyContribution, verificationVector), "Broadcasted Data is not correct" ); uint index = _nodeIndexInSchain(groupIndex, complaints[groupIndex].fromNodeToComplaint); _verifyDataAndSlash( groupIndex, indexOnSchain, secretNumber, multipliedShare, verificationVector, secretKeyContribution[index].share ); } function alright(bytes32 groupIndex, uint fromNodeIndex) external correctGroup(groupIndex) correctNode(groupIndex, fromNodeIndex) { require(_isNodeByMessageSender(fromNodeIndex, msg.sender), "Node does not exist for message sender"); uint index = _nodeIndexInSchain(groupIndex, fromNodeIndex); uint numberOfParticipant = channels[groupIndex].n; require(numberOfParticipant == dkgProcess[groupIndex].numberOfBroadcasted, "Still Broadcasting phase"); require( complaints[groupIndex].fromNodeToComplaint != fromNodeIndex || (fromNodeIndex == 0 && complaints[groupIndex].startComplaintBlockTimestamp == 0), "Node has already sent complaint" ); require(!dkgProcess[groupIndex].completed[index], "Node is already alright"); dkgProcess[groupIndex].completed[index] = true; dkgProcess[groupIndex].numberOfCompleted++; emit AllDataReceived(groupIndex, fromNodeIndex); if (dkgProcess[groupIndex].numberOfCompleted == numberOfParticipant) { _setSuccesfulDKG(groupIndex); } } function getChannelStartedTime(bytes32 groupIndex) external view returns (uint) { return channels[groupIndex].startedBlockTimestamp; } function getChannelStartedBlock(bytes32 groupIndex) external view returns (uint) { return channels[groupIndex].startedBlock; } function getNumberOfBroadcasted(bytes32 groupIndex) external view returns (uint) { return dkgProcess[groupIndex].numberOfBroadcasted; } function getNumberOfCompleted(bytes32 groupIndex) external view returns (uint) { return dkgProcess[groupIndex].numberOfCompleted; } function getTimeOfLastSuccesfulDKG(bytes32 groupIndex) external view returns (uint) { return lastSuccesfulDKG[groupIndex]; } function getComplaintData(bytes32 groupIndex) external view returns (uint, uint) { return (complaints[groupIndex].fromNodeToComplaint, complaints[groupIndex].nodeToComplaint); } function getComplaintStartedTime(bytes32 groupIndex) external view returns (uint) { return complaints[groupIndex].startComplaintBlockTimestamp; } function getAlrightStartedTime(bytes32 groupIndex) external view returns (uint) { return startAlrightTimestamp[groupIndex]; } function isChannelOpened(bytes32 groupIndex) external override view returns (bool) { return channels[groupIndex].active; } function isLastDKGSuccesful(bytes32 groupIndex) external override view returns (bool) { return channels[groupIndex].startedBlockTimestamp <= lastSuccesfulDKG[groupIndex]; } function isBroadcastPossible(bytes32 groupIndex, uint nodeIndex) external view returns (bool) { uint index = _nodeIndexInSchain(groupIndex, nodeIndex); return channels[groupIndex].active && index < channels[groupIndex].n && _isNodeByMessageSender(nodeIndex, msg.sender) && !dkgProcess[groupIndex].broadcasted[index]; } function isComplaintPossible( bytes32 groupIndex, uint fromNodeIndex, uint toNodeIndex ) external view returns (bool) { uint indexFrom = _nodeIndexInSchain(groupIndex, fromNodeIndex); uint indexTo = _nodeIndexInSchain(groupIndex, toNodeIndex); bool complaintSending = ( complaints[groupIndex].nodeToComplaint == uint(-1) && dkgProcess[groupIndex].broadcasted[indexTo] && !dkgProcess[groupIndex].completed[indexFrom] ) || ( dkgProcess[groupIndex].broadcasted[indexTo] && complaints[groupIndex].startComplaintBlockTimestamp.add(COMPLAINT_TIMELIMIT) <= block.timestamp && complaints[groupIndex].nodeToComplaint == toNodeIndex ) || ( !dkgProcess[groupIndex].broadcasted[indexTo] && complaints[groupIndex].nodeToComplaint == uint(-1) && channels[groupIndex].startedBlockTimestamp.add(COMPLAINT_TIMELIMIT) <= block.timestamp ) || ( complaints[groupIndex].nodeToComplaint == uint(-1) && isEveryoneBroadcasted(groupIndex) && dkgProcess[groupIndex].completed[indexFrom] && !dkgProcess[groupIndex].completed[indexTo] && startAlrightTimestamp[groupIndex].add(COMPLAINT_TIMELIMIT) <= block.timestamp ); return channels[groupIndex].active && indexFrom < channels[groupIndex].n && indexTo < channels[groupIndex].n && dkgProcess[groupIndex].broadcasted[indexFrom] && _isNodeByMessageSender(fromNodeIndex, msg.sender) && complaintSending; } function isAlrightPossible(bytes32 groupIndex, uint nodeIndex) external view returns (bool) { uint index = _nodeIndexInSchain(groupIndex, nodeIndex); return channels[groupIndex].active && index < channels[groupIndex].n && _isNodeByMessageSender(nodeIndex, msg.sender) && channels[groupIndex].n == dkgProcess[groupIndex].numberOfBroadcasted && (complaints[groupIndex].fromNodeToComplaint != nodeIndex || (nodeIndex == 0 && complaints[groupIndex].startComplaintBlockTimestamp == 0)) && !dkgProcess[groupIndex].completed[index]; } function isResponsePossible(bytes32 groupIndex, uint nodeIndex) external view returns (bool) { uint index = _nodeIndexInSchain(groupIndex, nodeIndex); return channels[groupIndex].active && index < channels[groupIndex].n && _isNodeByMessageSender(nodeIndex, msg.sender) && complaints[groupIndex].nodeToComplaint == nodeIndex; } function initialize(address contractsAddress) public override initializer { Permissions.initialize(contractsAddress); } function isNodeBroadcasted(bytes32 groupIndex, uint nodeIndex) public view returns (bool) { uint index = _nodeIndexInSchain(groupIndex, nodeIndex); return index < channels[groupIndex].n && dkgProcess[groupIndex].broadcasted[index]; } function isEveryoneBroadcasted(bytes32 groupIndex) public view returns (bool) { return channels[groupIndex].n == dkgProcess[groupIndex].numberOfBroadcasted; } function isAllDataReceived(bytes32 groupIndex, uint nodeIndex) public view returns (bool) { uint index = _nodeIndexInSchain(groupIndex, nodeIndex); return dkgProcess[groupIndex].completed[index]; } function getT(uint n) public pure returns (uint) { return n.mul(2).add(1).div(3); } function _setSuccesfulDKG(bytes32 groupIndex) internal { lastSuccesfulDKG[groupIndex] = now; channels[groupIndex].active = false; KeyStorage(contractManager.getContract("KeyStorage")).finalizePublicKey(groupIndex); emit SuccessfulDKG(groupIndex); } function _verifyDataAndSlash( bytes32 groupIndex, uint indexOnSchain, uint secretNumber, G2Operations.G2Point calldata multipliedShare, G2Operations.G2Point[] calldata verificationVector, bytes32 share ) internal { bytes32[2] memory publicKey = Nodes(contractManager.getContract("Nodes")).getNodePublicKey( complaints[groupIndex].fromNodeToComplaint ); uint256 pkX = uint(publicKey[0]); (pkX, ) = ECDH(contractManager.getContract("ECDH")).deriveKey(secretNumber, pkX, uint(publicKey[1])); bytes32 key = bytes32(pkX); // Decrypt secret key contribution uint secret = Decryption(contractManager.getContract("Decryption")).decrypt( share, key ); uint badNode = (_checkCorrectMultipliedShare(multipliedShare, indexOnSchain, secret, verificationVector) ? complaints[groupIndex].fromNodeToComplaint : complaints[groupIndex].nodeToComplaint); _finalizeSlashing(groupIndex, badNode); } function _checkCorrectMultipliedShare( G2Operations.G2Point memory multipliedShare, uint indexOnSchain, uint secret, G2Operations.G2Point[] calldata verificationVector ) private view returns (bool) { if (!multipliedShare.isG2()) { return false; } G2Operations.G2Point memory value = G2Operations.getG2Zero(); G2Operations.G2Point memory tmp = G2Operations.getG2Zero(); for (uint i = 0; i < verificationVector.length; i++) { tmp = verificationVector[i].mulG2(indexOnSchain.add(1) ** i); value = tmp.addG2(value); } tmp = multipliedShare; Fp2Operations.Fp2Point memory g1 = G2Operations.getG1(); Fp2Operations.Fp2Point memory share = Fp2Operations.Fp2Point({ a: 0, b: 0 }); (share.a, share.b) = Precompiled.bn256ScalarMul(g1.a, g1.b, secret); if (!(share.a == 0 && share.b == 0)) { share.b = Fp2Operations.P.sub((share.b % Fp2Operations.P)); } require(G2Operations.isG1(share), "mulShare not in G1"); G2Operations.G2Point memory g2 = G2Operations.getG2(); require(G2Operations.isG2(tmp), "tmp not in g2"); return value.isEqual(multipliedShare) && Precompiled.bn256Pairing( share.a, share.b, g2.x.b, g2.x.a, g2.y.b, g2.y.a, g1.a, g1.b, tmp.x.b, tmp.x.a, tmp.y.b, tmp.y.a); } function _openChannel(bytes32 groupIndex) private { SchainsInternal schainsInternal = SchainsInternal( contractManager.getContract("SchainsInternal") ); uint len = schainsInternal.getNumberOfNodesInGroup(groupIndex); channels[groupIndex].active = true; channels[groupIndex].n = len; delete dkgProcess[groupIndex].completed; delete dkgProcess[groupIndex].broadcasted; dkgProcess[groupIndex].broadcasted = new bool[](len); dkgProcess[groupIndex].completed = new bool[](len); complaints[groupIndex].fromNodeToComplaint = uint(-1); complaints[groupIndex].nodeToComplaint = uint(-1); delete complaints[groupIndex].startComplaintBlockTimestamp; delete dkgProcess[groupIndex].numberOfBroadcasted; delete dkgProcess[groupIndex].numberOfCompleted; channels[groupIndex].startedBlockTimestamp = now; channels[groupIndex].startedBlock = block.number; KeyStorage(contractManager.getContract("KeyStorage")).initPublicKeyInProgress(groupIndex); emit ChannelOpened(groupIndex); } function _handleComplaintWhenBroadcasted(bytes32 groupIndex, uint fromNodeIndex, uint toNodeIndex) private { // incorrect data or missing alright if (complaints[groupIndex].nodeToComplaint == uint(-1)) { if ( isEveryoneBroadcasted(groupIndex) && !isAllDataReceived(groupIndex, toNodeIndex) && startAlrightTimestamp[groupIndex].add(COMPLAINT_TIMELIMIT) <= block.timestamp ) { // missing alright _finalizeSlashing(groupIndex, toNodeIndex); return; } else if (!isAllDataReceived(groupIndex, fromNodeIndex)) { // incorrect data complaints[groupIndex].nodeToComplaint = toNodeIndex; complaints[groupIndex].fromNodeToComplaint = fromNodeIndex; complaints[groupIndex].startComplaintBlockTimestamp = block.timestamp; emit ComplaintSent(groupIndex, fromNodeIndex, toNodeIndex); return; } emit ComplaintError("Has already sent alright"); return; } else if (complaints[groupIndex].nodeToComplaint == toNodeIndex) { // 30 min after incorrect data complaint if (complaints[groupIndex].startComplaintBlockTimestamp.add(COMPLAINT_TIMELIMIT) <= block.timestamp) { _finalizeSlashing(groupIndex, complaints[groupIndex].nodeToComplaint); return; } emit ComplaintError("The same complaint rejected"); return; } emit ComplaintError("One complaint is already sent"); } function _finalizeSlashing(bytes32 groupIndex, uint badNode) private { NodeRotation nodeRotation = NodeRotation(contractManager.getContract("NodeRotation")); SchainsInternal schainsInternal = SchainsInternal( contractManager.getContract("SchainsInternal") ); emit BadGuy(badNode); emit FailedDKG(groupIndex); if (schainsInternal.isAnyFreeNode(groupIndex)) { uint newNode = nodeRotation.rotateNode( badNode, groupIndex, false ); emit NewGuy(newNode); } else { _openChannel(groupIndex); schainsInternal.removeNodeFromSchain( badNode, groupIndex ); channels[groupIndex].active = false; } Punisher(contractManager.getContract("Punisher")).slash( Nodes(contractManager.getContract("Nodes")).getValidatorId(badNode), SlashingTable(contractManager.getContract("SlashingTable")).getPenalty("FailedDKG") ); } function _nodeIndexInSchain(bytes32 schainId, uint nodeIndex) private view returns (uint) { return SchainsInternal(contractManager.getContract("SchainsInternal")) .getNodeIndexInGroup(schainId, nodeIndex); } function _isNodeByMessageSender(uint nodeIndex, address from) private view returns (bool) { Nodes nodes = Nodes(contractManager.getContract("Nodes")); return nodes.isNodeExist(from, nodeIndex); } function _hashData( KeyShare[] memory secretKeyContribution, G2Operations.G2Point[] memory verificationVector ) private pure returns (bytes32) { bytes memory data; for (uint i = 0; i < secretKeyContribution.length; i++) { data = abi.encodePacked(data, secretKeyContribution[i].publicKey, secretKeyContribution[i].share); } for (uint i = 0; i < verificationVector.length; i++) { data = abi.encodePacked( data, verificationVector[i].x.a, verificationVector[i].x.b, verificationVector[i].y.a, verificationVector[i].y.b ); } return keccak256(data); } } contract SkaleManager is IERC777Recipient, Permissions { IERC1820Registry private _erc1820; bytes32 constant private _TOKENS_RECIPIENT_INTERFACE_HASH = 0xb281fc8c12954d22544db45de3159a39272895b169a852b314f9cc762e44c53b; bytes32 constant public ADMIN_ROLE = keccak256("ADMIN_ROLE"); event BountyGot( uint indexed nodeIndex, address owner, uint averageDowntime, uint averageLatency, uint bounty, uint previousBlockEvent, uint time, uint gasSpend ); function tokensReceived( address, // operator address from, address to, uint256 value, bytes calldata userData, bytes calldata // operator data ) external override allow("SkaleToken") { require(to == address(this), "Receiver is incorrect"); if (userData.length > 0) { Schains schains = Schains( contractManager.getContract("Schains")); schains.addSchain(from, value, userData); } } function createNode( uint16 port, uint16 nonce, bytes4 ip, bytes4 publicIp, bytes32[2] calldata publicKey, string calldata name) external { Nodes nodes = Nodes(contractManager.getContract("Nodes")); // validators checks inside checkPossibilityCreatingNode nodes.checkPossibilityCreatingNode(msg.sender); Nodes.NodeCreationParams memory params = Nodes.NodeCreationParams({ name: name, ip: ip, publicIp: publicIp, port: port, publicKey: publicKey, nonce: nonce}); nodes.createNode(msg.sender, params); // uint nodeIndex = nodes.createNode(msg.sender, params); // Monitors monitors = Monitors(contractManager.getContract("Monitors")); // monitors.addMonitor(nodeIndex); } function nodeExit(uint nodeIndex) external { NodeRotation nodeRotation = NodeRotation(contractManager.getContract("NodeRotation")); ValidatorService validatorService = ValidatorService(contractManager.getContract("ValidatorService")); Nodes nodes = Nodes(contractManager.getContract("Nodes")); uint validatorId = nodes.getValidatorId(nodeIndex); bool permitted = (_isOwner() || nodes.isNodeExist(msg.sender, nodeIndex)); if (!permitted) { permitted = validatorService.getValidatorId(msg.sender) == validatorId; } require(permitted, "Sender is not permitted to call this function"); SchainsInternal schainsInternal = SchainsInternal(contractManager.getContract("SchainsInternal")); ConstantsHolder constants = ConstantsHolder(contractManager.getContract("ConstantsHolder")); nodeRotation.freezeSchains(nodeIndex); if (nodes.isNodeActive(nodeIndex)) { require(nodes.initExit(nodeIndex), "Initialization of node exit is failed"); } bool completed; bool isSchains = false; if (schainsInternal.getActiveSchain(nodeIndex) != bytes32(0)) { completed = nodeRotation.exitFromSchain(nodeIndex); isSchains = true; } else { completed = true; } if (completed) { require(nodes.completeExit(nodeIndex), "Finishing of node exit is failed"); nodes.changeNodeFinishTime(nodeIndex, now.add(isSchains ? constants.rotationDelay() : 0)); // Monitors monitors = Monitors(contractManager.getContract("Monitors")); // monitors.removeCheckedNodes(nodeIndex); // monitors.deleteMonitor(nodeIndex); nodes.deleteNodeForValidator(validatorId, nodeIndex); } } function deleteSchain(string calldata name) external { Schains schains = Schains(contractManager.getContract("Schains")); // schain owner checks inside deleteSchain schains.deleteSchain(msg.sender, name); } function deleteSchainByRoot(string calldata name) external onlyAdmin { Schains schains = Schains(contractManager.getContract("Schains")); schains.deleteSchainByRoot(name); } // function sendVerdict(uint fromMonitorIndex, Monitors.Verdict calldata verdict) external { // Nodes nodes = Nodes(contractManager.getContract("Nodes")); // require(nodes.isNodeExist(msg.sender, fromMonitorIndex), "Node does not exist for Message sender"); // Monitors monitors = Monitors(contractManager.getContract("Monitors")); // // additional checks for monitoring inside sendVerdict // monitors.sendVerdict(fromMonitorIndex, verdict); // } // function sendVerdicts(uint fromMonitorIndex, Monitors.Verdict[] calldata verdicts) external { // Nodes nodes = Nodes(contractManager.getContract("Nodes")); // require(nodes.isNodeExist(msg.sender, fromMonitorIndex), "Node does not exist for Message sender"); // Monitors monitors = Monitors(contractManager.getContract("Monitors")); // for (uint i = 0; i < verdicts.length; i++) { // // additional checks for monitoring inside sendVerdict // monitors.sendVerdict(fromMonitorIndex, verdicts[i]); // } // } function getBounty(uint nodeIndex) external { Nodes nodes = Nodes(contractManager.getContract("Nodes")); require(nodes.isNodeExist(msg.sender, nodeIndex), "Node does not exist for Message sender"); require(nodes.isTimeForReward(nodeIndex), "Not time for bounty"); require( nodes.isNodeActive(nodeIndex) || nodes.isNodeLeaving(nodeIndex), "Node is not Active and is not Leaving" ); Bounty bountyContract = Bounty(contractManager.getContract("Bounty")); uint averageDowntime; uint averageLatency; Monitors monitors = Monitors(contractManager.getContract("Monitors")); (averageDowntime, averageLatency) = monitors.calculateMetrics(nodeIndex); uint bounty = bountyContract.getBounty( nodeIndex, averageDowntime, averageLatency); nodes.changeNodeLastRewardDate(nodeIndex); // monitors.deleteMonitor(nodeIndex); // monitors.addMonitor(nodeIndex); if (bounty > 0) { _payBounty(bounty, nodes.getValidatorId(nodeIndex)); } _emitBountyEvent(nodeIndex, msg.sender, averageDowntime, averageLatency, bounty); } function initialize(address newContractsAddress) public override initializer { Permissions.initialize(newContractsAddress); _erc1820 = IERC1820Registry(0x1820a4B7618BdE71Dce8cdc73aAB6C95905faD24); _erc1820.setInterfaceImplementer(address(this), _TOKENS_RECIPIENT_INTERFACE_HASH, address(this)); } function _payBounty(uint bounty, uint validatorId) private returns (bool) { IERC777 skaleToken = IERC777(contractManager.getContract("SkaleToken")); Distributor distributor = Distributor(contractManager.getContract("Distributor")); require( IMintableToken(address(skaleToken)).mint(address(distributor), bounty, abi.encode(validatorId), ""), "Token was not minted" ); } function _emitBountyEvent( uint nodeIndex, address from, uint averageDowntime, uint averageLatency, uint bounty ) private { Monitors monitors = Monitors(contractManager.getContract("Monitors")); uint previousBlockEvent = monitors.getLastBountyBlock(nodeIndex); monitors.setLastBountyBlock(nodeIndex); emit BountyGot( nodeIndex, from, averageDowntime, averageLatency, bounty, previousBlockEvent, block.timestamp, gasleft()); } } contract SkaleToken is ERC777, Permissions, ReentrancyGuard, IDelegatableToken, IMintableToken { using SafeMath for uint; string public constant NAME = "SKALE"; string public constant SYMBOL = "SKL"; uint public constant DECIMALS = 18; uint public constant CAP = 7 * 1e9 * (10 ** DECIMALS); // the maximum amount of tokens that can ever be created constructor(address contractsAddress, address[] memory defOps) public ERC777("SKALE", "SKL", defOps) { Permissions.initialize(contractsAddress); } /** * @dev mint - create some amount of token and transfer it to the specified address * @param account - address where some amount of token would be created * @param amount - amount of tokens to mine * @param userData bytes extra information provided by the token holder (if any) * @param operatorData bytes extra information provided by the operator (if any) * @return returns success of function call. */ function mint( address account, uint256 amount, bytes calldata userData, bytes calldata operatorData ) external override allow("SkaleManager") //onlyAuthorized returns (bool) { require(amount <= CAP.sub(totalSupply()), "Amount is too big"); _mint( account, amount, userData, operatorData ); return true; } function getAndUpdateDelegatedAmount(address wallet) external override returns (uint) { return DelegationController(contractManager.getContract("DelegationController")) .getAndUpdateDelegatedAmount(wallet); } function getAndUpdateSlashedAmount(address wallet) external override returns (uint) { return Punisher(contractManager.getContract("Punisher")).getAndUpdateLockedAmount(wallet); } function getAndUpdateLockedAmount(address wallet) public override returns (uint) { return TokenState(contractManager.getContract("TokenState")).getAndUpdateLockedAmount(wallet); } // internal function _beforeTokenTransfer( address, // operator address from, address, // to uint256 tokenId) internal override { uint locked = getAndUpdateLockedAmount(from); if (locked > 0) { require(balanceOf(from) >= locked.add(tokenId), "Token should be unlocked for transferring"); } } function _callTokensToSend( address operator, address from, address to, uint256 amount, bytes memory userData, bytes memory operatorData ) internal override nonReentrant { super._callTokensToSend(operator, from, to, amount, userData, operatorData); } function _callTokensReceived( address operator, address from, address to, uint256 amount, bytes memory userData, bytes memory operatorData, bool requireReceptionAck ) internal override nonReentrant { super._callTokensReceived(operator, from, to, amount, userData, operatorData, requireReceptionAck); } // we have to override _msgData() and _msgSender() functions because of collision in Context and ContextUpgradeSafe function _msgData() internal view override(Context, ContextUpgradeSafe) returns (bytes memory) { return Context._msgData(); } function _msgSender() internal view override(Context, ContextUpgradeSafe) returns (address payable) { return Context._msgSender(); } } contract SkaleVerifier is Permissions { using Fp2Operations for Fp2Operations.Fp2Point; function verify( Fp2Operations.Fp2Point calldata signature, bytes32 hash, uint counter, uint hashA, uint hashB, G2Operations.G2Point calldata publicKey ) external view returns (bool) { if (!_checkHashToGroupWithHelper( hash, counter, hashA, hashB ) ) { return false; } uint newSignB; if (!(signature.a == 0 && signature.b == 0)) { newSignB = Fp2Operations.P.sub((signature.b % Fp2Operations.P)); } else { newSignB = signature.b; } require(G2Operations.isG1Point(signature.a, newSignB), "Sign not in G1"); require(G2Operations.isG1Point(hashA, hashB), "Hash not in G1"); G2Operations.G2Point memory g2 = G2Operations.getG2(); require( G2Operations.isG2(publicKey), "Public Key not in G2" ); return Precompiled.bn256Pairing( signature.a, newSignB, g2.x.b, g2.x.a, g2.y.b, g2.y.a, hashA, hashB, publicKey.x.b, publicKey.x.a, publicKey.y.b, publicKey.y.a ); } function initialize(address newContractsAddress) public override initializer { Permissions.initialize(newContractsAddress); } function _checkHashToGroupWithHelper( bytes32 hash, uint counter, uint hashA, uint hashB ) private pure returns (bool) { uint xCoord = uint(hash) % Fp2Operations.P; xCoord = (xCoord.add(counter)) % Fp2Operations.P; uint ySquared = addmod( mulmod(mulmod(xCoord, xCoord, Fp2Operations.P), xCoord, Fp2Operations.P), 3, Fp2Operations.P ); if (hashB < Fp2Operations.P.div(2) || mulmod(hashB, hashB, Fp2Operations.P) != ySquared || xCoord != hashA) { return false; } return true; } } contract SlashingTable is Permissions { mapping (uint => uint) private _penalties; /** * @dev Sets a penalty for a given offense * Only the owner can set penalties. * * @param offense string * @param penalty uint amount of slashing for the specified penalty */ function setPenalty(string calldata offense, uint penalty) external onlyOwner { _penalties[uint(keccak256(abi.encodePacked(offense)))] = penalty; } /** * @dev Returns the penalty for a given offense * * @param offense string * @return uint amount of slashing for the specified penalty */ function getPenalty(string calldata offense) external view returns (uint) { uint penalty = _penalties[uint(keccak256(abi.encodePacked(offense)))]; return penalty; } function initialize(address contractManagerAddress) public override initializer { Permissions.initialize(contractManagerAddress); } } contract TokenLaunchLocker is Permissions, ILocker { using MathUtils for uint; using PartialDifferences for PartialDifferences.Value; /** * @dev Emitted when an `amount` is unlocked. */ event Unlocked( address holder, uint amount ); /** * @dev Emitted when an `amount` is locked. */ event Locked( address holder, uint amount ); struct DelegatedAmountAndMonth { uint delegated; uint month; } // holder => tokens mapping (address => uint) private _locked; // holder => tokens mapping (address => PartialDifferences.Value) private _delegatedAmount; mapping (address => DelegatedAmountAndMonth) private _totalDelegatedAmount; // delegationId => tokens mapping (uint => uint) private _delegationAmount; function lock(address holder, uint amount) external allow("TokenLaunchManager") { _locked[holder] = _locked[holder].add(amount); emit Locked(holder, amount); } function handleDelegationAdd( address holder, uint delegationId, uint amount, uint month) external allow("DelegationController") { if (_locked[holder] > 0) { TimeHelpers timeHelpers = TimeHelpers(contractManager.getContract("TimeHelpers")); uint currentMonth = timeHelpers.getCurrentMonth(); uint fromLocked = amount; uint locked = _locked[holder].boundedSub(_getAndUpdateDelegatedAmount(holder, currentMonth)); if (fromLocked > locked) { fromLocked = locked; } if (fromLocked > 0) { require(_delegationAmount[delegationId] == 0, "Delegation was already added"); _addToDelegatedAmount(holder, fromLocked, month); _addToTotalDelegatedAmount(holder, fromLocked, month); _delegationAmount[delegationId] = fromLocked; } } } function handleDelegationRemoving( address holder, uint delegationId, uint month) external allow("DelegationController") { if (_delegationAmount[delegationId] > 0) { if (_locked[holder] > 0) { _removeFromDelegatedAmount(holder, _delegationAmount[delegationId], month); } delete _delegationAmount[delegationId]; } } function getAndUpdateLockedAmount(address wallet) external override returns (uint) { if (_locked[wallet] > 0) { DelegationController delegationController = DelegationController( contractManager.getContract("DelegationController")); TimeHelpers timeHelpers = TimeHelpers(contractManager.getContract("TimeHelpers")); ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); uint currentMonth = timeHelpers.getCurrentMonth(); if (_totalDelegatedSatisfiesProofOfUserCondition(wallet) && timeHelpers.calculateProofOfUseLockEndTime( _totalDelegatedAmount[wallet].month, constantsHolder.proofOfUseLockUpPeriodDays() ) <= now) { _unlock(wallet); return 0; } else { uint lockedByDelegationController = _getAndUpdateDelegatedAmount(wallet, currentMonth) .add(delegationController.getLockedInPendingDelegations(wallet)); if (_locked[wallet] > lockedByDelegationController) { return _locked[wallet].boundedSub(lockedByDelegationController); } else { return 0; } } } else { return 0; } } function getAndUpdateForbiddenForDelegationAmount(address) external override returns (uint) { return 0; } function initialize(address contractManagerAddress) public override initializer { Permissions.initialize(contractManagerAddress); } // private function _getAndUpdateDelegatedAmount(address holder, uint currentMonth) private returns (uint) { return _delegatedAmount[holder].getAndUpdateValue(currentMonth); } function _addToDelegatedAmount(address holder, uint amount, uint month) private { _delegatedAmount[holder].addToValue(amount, month); } function _removeFromDelegatedAmount(address holder, uint amount, uint month) private { _delegatedAmount[holder].subtractFromValue(amount, month); } function _addToTotalDelegatedAmount(address holder, uint amount, uint month) private { require( _totalDelegatedAmount[holder].month == 0 || _totalDelegatedAmount[holder].month <= month, "Can't add to total delegated in the past"); // do not update counter if it is big enough // because it will override month value if (!_totalDelegatedSatisfiesProofOfUserCondition(holder)) { _totalDelegatedAmount[holder].delegated = _totalDelegatedAmount[holder].delegated.add(amount); _totalDelegatedAmount[holder].month = month; } } function _unlock(address holder) private { emit Unlocked(holder, _locked[holder]); delete _locked[holder]; _deleteDelegatedAmount(holder); _deleteTotalDelegatedAmount(holder); } function _deleteDelegatedAmount(address holder) private { _delegatedAmount[holder].clear(); } function _deleteTotalDelegatedAmount(address holder) private { delete _totalDelegatedAmount[holder].delegated; delete _totalDelegatedAmount[holder].month; } function _totalDelegatedSatisfiesProofOfUserCondition(address holder) private view returns (bool) { ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); return _totalDelegatedAmount[holder].delegated.mul(100) >= _locked[holder].mul(constantsHolder.proofOfUseDelegationPercentage()); } } contract TokenLaunchManager is Permissions, IERC777Recipient { event Approved( address holder, uint amount ); /** * @dev Emitted when a `holder` retrieves `amount`. */ event TokensRetrieved( address holder, uint amount ); /** * @dev Emitted when token launch is completed. */ event TokenLaunchIsCompleted( uint timestamp ); bytes32 public constant SELLER_ROLE = keccak256("SELLER_ROLE"); IERC1820Registry private _erc1820; mapping (address => uint) public approved; bool public tokenLaunchIsCompleted; uint private _totalApproved; modifier onlySeller() { require(_isOwner() || hasRole(SELLER_ROLE, _msgSender()), "Not authorized"); _; } /** * @dev Allocates values for `walletAddress` * * Requirements: * * - token launch must not be completed * - the total approved must be less than or equal to the seller balance. * * Emits an Approved event. * * @param walletAddress address wallet address to approve transfers to * @param value uint token amount to approve transfer to */ function approveTransfer(address walletAddress, uint value) external onlySeller { require(!tokenLaunchIsCompleted, "Can't approve because token launch is completed"); _approveTransfer(walletAddress, value); require(_totalApproved <= _getBalance(), "Balance is too low"); } /** * @dev Allocates values for `walletAddresses` * * Requirements: * * - token launch must not be completed * - the input arrays must be equal in size. * - the total approved must be less than or equal to the seller balance. * * Emits an Approved event. * * @param walletAddress address[] array of wallet addresses to approve transfers to * @param value uint[] array of token amounts to approve transfer to */ function approveBatchOfTransfers(address[] calldata walletAddress, uint[] calldata value) external onlySeller { require(!tokenLaunchIsCompleted, "Can't approve because token launch is completed"); require(walletAddress.length == value.length, "Wrong input arrays length"); for (uint i = 0; i < walletAddress.length; ++i) { _approveTransfer(walletAddress[i], value[i]); } require(_totalApproved <= _getBalance(), "Balance is too low"); } /** * @dev Allow withdrawals and disallow approvals changes * * Requirements: * * - all approvals must be done * - token launch must be not completed * */ function completeTokenLaunch() external onlySeller { require(!tokenLaunchIsCompleted, "Can't complete launch because it's already completed"); tokenLaunchIsCompleted = true; emit TokenLaunchIsCompleted(now); } /** * @dev Allows the seller to update a purchaser's address in case of an error. * * Requirements: * * - the updated address must not already be in use. * * Emits an Approved event. * * @param oldAddress address token purchaser's previous address * @param newAddress address token purchaser's new address */ function changeApprovalAddress(address oldAddress, address newAddress) external onlySeller { require(!tokenLaunchIsCompleted, "Can't change approval because token launch is completed"); require(approved[newAddress] == 0, "New address is already used"); uint oldValue = approved[oldAddress]; if (oldValue > 0) { _setApprovedAmount(oldAddress, 0); _approveTransfer(newAddress, oldValue); } } /** * @dev Allows the seller to update a purchaser's amount in case of an error. * * @param wallet address of the token purchaser * @param newValue uint of the updated token amount */ function changeApprovalValue(address wallet, uint newValue) external onlySeller { require(!tokenLaunchIsCompleted, "Can't change approval because token launch is completed"); _setApprovedAmount(wallet, newValue); } /** * @dev Transfers the entire value to the sender's address. Transferred tokens * are locked for Proof-of-Use. * * Requirements: * * - token transfer must be approved. */ function retrieve() external { require(tokenLaunchIsCompleted, "Can't retrive tokens because token launch is not completed"); require(approved[_msgSender()] > 0, "Transfer is not approved"); uint value = approved[_msgSender()]; _setApprovedAmount(_msgSender(), 0); require( IERC20(contractManager.getContract("SkaleToken")).transfer(_msgSender(), value), "Error in transfer call to SkaleToken"); TokenLaunchLocker(contractManager.getContract("TokenLaunchLocker")).lock(_msgSender(), value); emit TokensRetrieved(_msgSender(), value); } /** * @dev A required callback for ERC777. */ function tokensReceived( address operator, address from, address to, uint256 amount, bytes calldata userData, bytes calldata operatorData ) external override allow("SkaleToken") // solhint-disable-next-line no-empty-blocks { } function initialize(address contractManagerAddress) public override initializer { Permissions.initialize(contractManagerAddress); tokenLaunchIsCompleted = false; _erc1820 = IERC1820Registry(0x1820a4B7618BdE71Dce8cdc73aAB6C95905faD24); _erc1820.setInterfaceImplementer(address(this), keccak256("ERC777TokensRecipient"), address(this)); } // private function _approveTransfer(address walletAddress, uint value) internal onlySeller { require(value > 0, "Value must be greater than zero"); _setApprovedAmount(walletAddress, approved[walletAddress].add(value)); emit Approved(walletAddress, value); } function _getBalance() private view returns(uint balance) { return IERC20(contractManager.getContract("SkaleToken")).balanceOf(address(this)); } function _setApprovedAmount(address wallet, uint value) private { require(wallet != address(0), "Wallet address must be non zero"); uint oldValue = approved[wallet]; if (oldValue != value) { approved[wallet] = value; if (value > oldValue) { _totalApproved = _totalApproved.add(value.sub(oldValue)); } else { _totalApproved = _totalApproved.sub(oldValue.sub(value)); } } } } contract TokenState is Permissions, ILocker { /** * @dev Emitted when a contract is added to the locker. */ event LockerWasAdded( string locker ); /** * @dev Emitted when a contract is removed from the locker. */ event LockerWasRemoved( string locker ); string[] private _lockers; /** * @dev Return and update the total locked amount of a given `holder`. * * @param holder address of the token holder * @return total locked amount */ function getAndUpdateLockedAmount(address holder) external override returns (uint) { uint locked = 0; for (uint i = 0; i < _lockers.length; ++i) { ILocker locker = ILocker(contractManager.getContract(_lockers[i])); locked = locked.add(locker.getAndUpdateLockedAmount(holder)); } return locked; } /** * @dev Return and update the total locked and un-delegatable amount of a given `holder`. * * @param holder address of the token holder * @return amount total slashed amount (non-transferable and non-delegatable) */ function getAndUpdateForbiddenForDelegationAmount(address holder) external override returns (uint amount) { uint forbidden = 0; for (uint i = 0; i < _lockers.length; ++i) { ILocker locker = ILocker(contractManager.getContract(_lockers[i])); forbidden = forbidden.add(locker.getAndUpdateForbiddenForDelegationAmount(holder)); } return forbidden; } /** * @dev Allows the Owner to remove a contract from the locker. * * Emits a LockerWasRemoved event. * * @param locker string name of contract to remove from locker */ function removeLocker(string calldata locker) external onlyOwner { uint index; bytes32 hash = keccak256(abi.encodePacked(locker)); for (index = 0; index < _lockers.length; ++index) { if (keccak256(abi.encodePacked(_lockers[index])) == hash) { break; } } if (index < _lockers.length) { if (index < _lockers.length.sub(1)) { _lockers[index] = _lockers[_lockers.length.sub(1)]; } delete _lockers[_lockers.length.sub(1)]; _lockers.pop(); emit LockerWasRemoved(locker); } } function initialize(address contractManagerAddress) public override initializer { Permissions.initialize(contractManagerAddress); addLocker("DelegationController"); addLocker("Punisher"); addLocker("TokenLaunchLocker"); } /** * @dev Allows the Owner to add a contract to the Locker. * * Emits a LockerWasAdded event. * * @param locker string name of contract to add to locker */ function addLocker(string memory locker) public onlyOwner { _lockers.push(locker); emit LockerWasAdded(locker); } } contract ValidatorService is Permissions { using ECDSA for bytes32; struct Validator { string name; address validatorAddress; address requestedAddress; string description; uint feeRate; uint registrationTime; uint minimumDelegationAmount; bool acceptNewRequests; } /** * @dev Emitted when a validator registers. */ event ValidatorRegistered( uint validatorId ); /** * @dev Emitted when a validator address changes. */ event ValidatorAddressChanged( uint validatorId, address newAddress ); event ValidatorWasEnabled( uint validatorId ); event ValidatorWasDisabled( uint validatorId ); /** * @dev Emitted when a node address is linked to a validator. */ event NodeAddressWasAdded( uint validatorId, address nodeAddress ); /** * @dev Emitted when a node address is unlinked from a validator. */ event NodeAddressWasRemoved( uint validatorId, address nodeAddress ); mapping (uint => Validator) public validators; mapping (uint => bool) private _trustedValidators; uint[] public trustedValidatorsList; // address => validatorId mapping (address => uint) private _validatorAddressToId; // address => validatorId mapping (address => uint) private _nodeAddressToValidatorId; // validatorId => nodeAddress[] mapping (uint => address[]) private _nodeAddresses; uint public numberOfValidators; bool public useWhitelist; modifier checkValidatorExists(uint validatorId) { require(validatorExists(validatorId), "Validator with such ID does not exist"); _; } /** * @dev Creates a new validator Id. * * Requirements: * * - sender must not already have registered a validator Id. * - fee rate must be between 0 - 1000‰. Note: per mille! * * Emits ValidatorRegistered event. * * @param name string * @param description string * @param feeRate uint Fee charged on delegations by the validator per mille * @param minimumDelegationAmount uint Minimum delegation amount accepted by the validator */ function registerValidator( string calldata name, string calldata description, uint feeRate, uint minimumDelegationAmount ) external returns (uint validatorId) { require(!validatorAddressExists(msg.sender), "Validator with such address already exists"); require(feeRate < 1000, "Fee rate of validator should be lower than 100%"); validatorId = ++numberOfValidators; validators[validatorId] = Validator( name, msg.sender, address(0), description, feeRate, now, minimumDelegationAmount, true ); _setValidatorAddress(validatorId, msg.sender); emit ValidatorRegistered(validatorId); } function enableValidator(uint validatorId) external checkValidatorExists(validatorId) onlyAdmin { require(!_trustedValidators[validatorId], "Validator is already enabled"); _trustedValidators[validatorId] = true; trustedValidatorsList.push(validatorId); emit ValidatorWasEnabled(validatorId); } function disableValidator(uint validatorId) external checkValidatorExists(validatorId) onlyAdmin { require(_trustedValidators[validatorId], "Validator is already disabled"); _trustedValidators[validatorId] = false; uint position = _find(trustedValidatorsList, validatorId); if (position < trustedValidatorsList.length) { trustedValidatorsList[position] = trustedValidatorsList[trustedValidatorsList.length.sub(1)]; } trustedValidatorsList.pop(); emit ValidatorWasDisabled(validatorId); } /** * @dev Owner can disable the validator whitelist. Once turned off the * whitelist cannot be re-enabled. */ function disableWhitelist() external onlyOwner { useWhitelist = false; } /** * @dev Allows a validator to request a new address. * * Requirements: * * - new address must not be null * - new address must not be already registered as a validator * * @param newValidatorAddress address */ function requestForNewAddress(address newValidatorAddress) external { require(newValidatorAddress != address(0), "New address cannot be null"); require(_validatorAddressToId[newValidatorAddress] == 0, "Address already registered"); // check Validator Exist inside getValidatorId uint validatorId = getValidatorId(msg.sender); validators[validatorId].requestedAddress = newValidatorAddress; } function confirmNewAddress(uint validatorId) external checkValidatorExists(validatorId) { require( getValidator(validatorId).requestedAddress == msg.sender, "The validator address cannot be changed because it is not the actual owner" ); delete validators[validatorId].requestedAddress; _setValidatorAddress(validatorId, msg.sender); emit ValidatorAddressChanged(validatorId, validators[validatorId].validatorAddress); } /** * @dev Links a given node address. * * Requirements: * * - the given signature must be valid. * - the address must not be assigned to a validator. * * Emits NodeAddressWasAdded event. * * @param nodeAddress address * @param sig bytes signature of validator Id by node operator. */ function linkNodeAddress(address nodeAddress, bytes calldata sig) external { // check Validator Exist inside getValidatorId uint validatorId = getValidatorId(msg.sender); require( keccak256(abi.encodePacked(validatorId)).toEthSignedMessageHash().recover(sig) == nodeAddress, "Signature is not pass" ); require(_validatorAddressToId[nodeAddress] == 0, "Node address is a validator"); _addNodeAddress(validatorId, nodeAddress); emit NodeAddressWasAdded(validatorId, nodeAddress); } /** * @dev Unlinks a given node address from a validator. * * Emits NodeAddressWasRemoved event. * * @param nodeAddress address */ function unlinkNodeAddress(address nodeAddress) external { // check Validator Exist inside getValidatorId uint validatorId = getValidatorId(msg.sender); _removeNodeAddress(validatorId, nodeAddress); emit NodeAddressWasRemoved(validatorId, nodeAddress); } function setValidatorMDA(uint minimumDelegationAmount) external { // check Validator Exist inside getValidatorId uint validatorId = getValidatorId(msg.sender); validators[validatorId].minimumDelegationAmount = minimumDelegationAmount; } /** * @dev Allows a validator to set a new validator name. * * @param newName string */ function setValidatorName(string calldata newName) external { // check Validator Exist inside getValidatorId uint validatorId = getValidatorId(msg.sender); validators[validatorId].name = newName; } /** * @dev Allows a validator to set a new validator description. * * @param newDescription string */ function setValidatorDescription(string calldata newDescription) external { // check Validator Exist inside getValidatorId uint validatorId = getValidatorId(msg.sender); validators[validatorId].description = newDescription; } /** * @dev Allows a validator to start accepting new delegation requests. * * Requirements: * * - validator must not have already enabled accepting new requests */ function startAcceptingNewRequests() external { // check Validator Exist inside getValidatorId uint validatorId = getValidatorId(msg.sender); require(!isAcceptingNewRequests(validatorId), "Accepting request is already enabled"); validators[validatorId].acceptNewRequests = true; } /** * @dev Allows a validator to stop accepting new delegation requests. * * Requirements: * * - validator must not have already stopped accepting new requests */ function stopAcceptingNewRequests() external { // check Validator Exist inside getValidatorId uint validatorId = getValidatorId(msg.sender); require(isAcceptingNewRequests(validatorId), "Accepting request is already disabled"); validators[validatorId].acceptNewRequests = false; } /** * @dev Returns the amount of validator bond. * * @param validatorId uint ID of validator to return the amount of locked funds * @return bondAmount uint the amount of self-delegated funds by the validator */ function getAndUpdateBondAmount(uint validatorId) external returns (uint) { DelegationController delegationController = DelegationController( contractManager.getContract("DelegationController") ); return delegationController.getAndUpdateDelegatedByHolderToValidatorNow( getValidator(validatorId).validatorAddress, validatorId ); } function getMyNodesAddresses() external view returns (address[] memory) { return getNodeAddresses(getValidatorId(msg.sender)); } /** * @dev Returns a list of trusted validators. * * @return uint[] trusted validators */ function getTrustedValidators() external view returns (uint[] memory) { return trustedValidatorsList; } function checkMinimumDelegation(uint validatorId, uint amount) external view checkValidatorExists(validatorId) allow("DelegationController") returns (bool) { return validators[validatorId].minimumDelegationAmount <= amount ? true : false; } function checkValidatorAddressToId(address validatorAddress, uint validatorId) external view returns (bool) { return getValidatorId(validatorAddress) == validatorId ? true : false; } function getValidatorIdByNodeAddress(address nodeAddress) external view returns (uint validatorId) { validatorId = _nodeAddressToValidatorId[nodeAddress]; require(validatorId != 0, "Node address is not assigned to a validator"); } function isAuthorizedValidator(uint validatorId) external view checkValidatorExists(validatorId) returns (bool) { return _trustedValidators[validatorId] || !useWhitelist; } function initialize(address contractManagerAddress) public override initializer { Permissions.initialize(contractManagerAddress); useWhitelist = true; } function getNodeAddresses(uint validatorId) public view returns (address[] memory) { return _nodeAddresses[validatorId]; } function validatorExists(uint validatorId) public view returns (bool) { return validatorId <= numberOfValidators && validatorId != 0; } function validatorAddressExists(address validatorAddress) public view returns (bool) { return _validatorAddressToId[validatorAddress] != 0; } function checkIfValidatorAddressExists(address validatorAddress) public view { require(validatorAddressExists(validatorAddress), "Validator with given address does not exist"); } function getValidator(uint validatorId) public view checkValidatorExists(validatorId) returns (Validator memory) { return validators[validatorId]; } function getValidatorId(address validatorAddress) public view returns (uint) { checkIfValidatorAddressExists(validatorAddress); return _validatorAddressToId[validatorAddress]; } function isAcceptingNewRequests(uint validatorId) public view checkValidatorExists(validatorId) returns (bool) { return validators[validatorId].acceptNewRequests; } // private function _setValidatorAddress(uint validatorId, address validatorAddress) private { if (_validatorAddressToId[validatorAddress] == validatorId) { return; } require(_validatorAddressToId[validatorAddress] == 0, "Address is in use by another validator"); address oldAddress = validators[validatorId].validatorAddress; delete _validatorAddressToId[oldAddress]; _nodeAddressToValidatorId[validatorAddress] = validatorId; validators[validatorId].validatorAddress = validatorAddress; _validatorAddressToId[validatorAddress] = validatorId; } function _addNodeAddress(uint validatorId, address nodeAddress) private { if (_nodeAddressToValidatorId[nodeAddress] == validatorId) { return; } require(_nodeAddressToValidatorId[nodeAddress] == 0, "Validator cannot override node address"); _nodeAddressToValidatorId[nodeAddress] = validatorId; _nodeAddresses[validatorId].push(nodeAddress); } function _removeNodeAddress(uint validatorId, address nodeAddress) private { require(_nodeAddressToValidatorId[nodeAddress] == validatorId, "Validator does not have permissions to unlink node"); delete _nodeAddressToValidatorId[nodeAddress]; for (uint i = 0; i < _nodeAddresses[validatorId].length; ++i) { if (_nodeAddresses[validatorId][i] == nodeAddress) { if (i + 1 < _nodeAddresses[validatorId].length) { _nodeAddresses[validatorId][i] = _nodeAddresses[validatorId][_nodeAddresses[validatorId].length.sub(1)]; } delete _nodeAddresses[validatorId][_nodeAddresses[validatorId].length.sub(1)]; _nodeAddresses[validatorId].pop(); break; } } } function _find(uint[] memory array, uint index) private pure returns (uint) { uint i; for (i = 0; i < array.length; i++) { if (array[i] == index) { return i; } } return array.length; } } contract Bounty is Permissions { uint public constant STAGE_LENGTH = 31558150; // 1 year uint public constant YEAR1_BOUNTY = 3850e5 * 1e18; uint public constant YEAR2_BOUNTY = 3465e5 * 1e18; uint public constant YEAR3_BOUNTY = 3080e5 * 1e18; uint public constant YEAR4_BOUNTY = 2695e5 * 1e18; uint public constant YEAR5_BOUNTY = 2310e5 * 1e18; uint public constant YEAR6_BOUNTY = 1925e5 * 1e18; uint public constant BOUNTY = 96250000 * 1e18; uint private _nextStage; uint private _stagePool; bool public bountyReduction; uint private _nodesPerRewardPeriod; uint private _nodesRemainingPerRewardPeriod; uint private _rewardPeriodFinished; function getBounty( uint nodeIndex, uint downtime, uint latency ) external allow("SkaleManager") returns (uint) { ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); Nodes nodes = Nodes(contractManager.getContract("Nodes")); _refillStagePool(constantsHolder); if (_rewardPeriodFinished <= now) { _updateNodesPerRewardPeriod(constantsHolder, nodes); } uint bounty = _calculateMaximumBountyAmount(_stagePool, _nextStage, nodeIndex, constantsHolder, nodes); bounty = _reduceBounty( bounty, nodeIndex, downtime, latency, nodes, constantsHolder ); _stagePool = _stagePool.sub(bounty); _nodesRemainingPerRewardPeriod = _nodesRemainingPerRewardPeriod.sub(1); return bounty; } function enableBountyReduction() external onlyOwner { bountyReduction = true; } function disableBountyReduction() external onlyOwner { bountyReduction = false; } function calculateNormalBounty(uint nodeIndex) external view returns (uint) { ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); Nodes nodes = Nodes(contractManager.getContract("Nodes")); uint stagePoolSize; uint nextStage; (stagePoolSize, nextStage) = _getStagePoolSize(constantsHolder); return _calculateMaximumBountyAmount( stagePoolSize, nextStage, nodeIndex, constantsHolder, nodes ); } function initialize(address contractManagerAddress) public override initializer { Permissions.initialize(contractManagerAddress); _nextStage = 0; _stagePool = 0; _rewardPeriodFinished = 0; bountyReduction = false; } // private function _calculateMaximumBountyAmount( uint stagePoolSize, uint nextStage, uint nodeIndex, ConstantsHolder constantsHolder, Nodes nodes ) private view returns (uint) { if (nodes.isNodeLeft(nodeIndex)) { return 0; } if (now < constantsHolder.launchTimestamp()) { // network is not launched // bounty is turned off return 0; } uint numberOfRewards = _getStageBeginningTimestamp(nextStage, constantsHolder) .sub(now) .div(constantsHolder.rewardPeriod()); uint numberOfRewardsPerAllNodes = numberOfRewards.mul(_nodesPerRewardPeriod); return stagePoolSize.div( numberOfRewardsPerAllNodes.add(_nodesRemainingPerRewardPeriod) ); } function _getStageBeginningTimestamp(uint stage, ConstantsHolder constantsHolder) private view returns (uint) { return constantsHolder.launchTimestamp().add(stage.mul(STAGE_LENGTH)); } function _getStagePoolSize(ConstantsHolder constantsHolder) private view returns (uint stagePool, uint nextStage) { stagePool = _stagePool; for (nextStage = _nextStage; now >= _getStageBeginningTimestamp(nextStage, constantsHolder); ++nextStage) { stagePool += _getStageReward(_nextStage); } } function _refillStagePool(ConstantsHolder constantsHolder) private { (_stagePool, _nextStage) = _getStagePoolSize(constantsHolder); } function _updateNodesPerRewardPeriod(ConstantsHolder constantsHolder, Nodes nodes) private { _nodesPerRewardPeriod = nodes.getNumberOnlineNodes(); _nodesRemainingPerRewardPeriod = _nodesPerRewardPeriod; _rewardPeriodFinished = now.add(uint(constantsHolder.rewardPeriod())); } function _getStageReward(uint stage) private pure returns (uint) { if (stage >= 6) { return BOUNTY.div(2 ** stage.sub(6).div(3)); } else { if (stage == 0) { return YEAR1_BOUNTY; } else if (stage == 1) { return YEAR2_BOUNTY; } else if (stage == 2) { return YEAR3_BOUNTY; } else if (stage == 3) { return YEAR4_BOUNTY; } else if (stage == 4) { return YEAR5_BOUNTY; } else { return YEAR6_BOUNTY; } } } function _reduceBounty( uint bounty, uint nodeIndex, uint downtime, uint latency, Nodes nodes, ConstantsHolder constants ) private returns (uint reducedBounty) { if (!bountyReduction) { return bounty; } reducedBounty = _reduceBountyByDowntime(bounty, nodeIndex, downtime, nodes, constants); if (latency > constants.allowableLatency()) { // reduce bounty because latency is too big reducedBounty = reducedBounty.mul(constants.allowableLatency()).div(latency); } if (!nodes.checkPossibilityToMaintainNode(nodes.getValidatorId(nodeIndex), nodeIndex)) { reducedBounty = reducedBounty.div(constants.MSR_REDUCING_COEFFICIENT()); } } function _reduceBountyByDowntime( uint bounty, uint nodeIndex, uint downtime, Nodes nodes, ConstantsHolder constants ) private view returns (uint reducedBounty) { reducedBounty = bounty; uint getBountyDeadline = uint(nodes.getNodeLastRewardDate(nodeIndex)) .add(constants.rewardPeriod()) .add(constants.deltaPeriod()); uint numberOfExpiredIntervals; if (now > getBountyDeadline) { numberOfExpiredIntervals = now.sub(getBountyDeadline).div(constants.checkTime()); } else { numberOfExpiredIntervals = 0; } uint normalDowntime = uint(constants.rewardPeriod()) .sub(constants.deltaPeriod()) .div(constants.checkTime()) .div(constants.DOWNTIME_THRESHOLD_PART()); uint totalDowntime = downtime.add(numberOfExpiredIntervals); if (totalDowntime > normalDowntime) { // reduce bounty because downtime is too big uint penalty = bounty .mul(totalDowntime) .div( uint(constants.rewardPeriod()).sub(constants.deltaPeriod()) .div(constants.checkTime()) ); if (bounty > penalty) { reducedBounty = bounty.sub(penalty); } else { reducedBounty = 0; } } } } contract ConstantsHolder is Permissions { // initial price for creating Node (100 SKL) uint public constant NODE_DEPOSIT = 100 * 1e18; uint8 public constant TOTAL_SPACE_ON_NODE = 128; // part of Node for Small Skale-chain (1/128 of Node) uint8 public constant SMALL_DIVISOR = 128; // part of Node for Medium Skale-chain (1/8 of Node) uint8 public constant MEDIUM_DIVISOR = 8; // part of Node for Large Skale-chain (full Node) uint8 public constant LARGE_DIVISOR = 1; // part of Node for Medium Test Skale-chain (1/4 of Node) uint8 public constant MEDIUM_TEST_DIVISOR = 4; // typically number of Nodes for Skale-chain (16 Nodes) uint public constant NUMBER_OF_NODES_FOR_SCHAIN = 16; // number of Nodes for Test Skale-chain (2 Nodes) uint public constant NUMBER_OF_NODES_FOR_TEST_SCHAIN = 2; // number of Nodes for Test Skale-chain (4 Nodes) uint public constant NUMBER_OF_NODES_FOR_MEDIUM_TEST_SCHAIN = 4; // number of seconds in one year uint32 public constant SECONDS_TO_YEAR = 31622400; // initial number of monitors uint public constant NUMBER_OF_MONITORS = 24; uint public constant OPTIMAL_LOAD_PERCENTAGE = 80; uint public constant ADJUSTMENT_SPEED = 1000; uint public constant COOLDOWN_TIME = 60; uint public constant MIN_PRICE = 10**6; uint public constant MSR_REDUCING_COEFFICIENT = 2; uint public constant DOWNTIME_THRESHOLD_PART = 30; uint public constant BOUNTY_LOCKUP_MONTHS = 2; // MSR - Minimum staking requirement uint public msr; // Reward period - 30 days (each 30 days Node would be granted for bounty) uint32 public rewardPeriod; // Allowable latency - 150000 ms by default uint32 public allowableLatency; /** * Delta period - 1 hour (1 hour before Reward period became Monitors need * to send Verdicts and 1 hour after Reward period became Node need to come * and get Bounty) */ uint32 public deltaPeriod; /** * Check time - 2 minutes (every 2 minutes monitors should check metrics * from checked nodes) */ uint public checkTime; //Need to add minimal allowed parameters for verdicts uint public launchTimestamp; uint public rotationDelay; uint public proofOfUseLockUpPeriodDays; uint public proofOfUseDelegationPercentage; uint public limitValidatorsPerDelegator; uint256 public firstDelegationsMonth; // deprecated // date when schains will be allowed for creation uint public schainCreationTimeStamp; uint public minimalSchainLifetime; /** * Set reward and delta periods to new one, run only by owner. This function * only for tests. * @param newRewardPeriod - new Reward period * @param newDeltaPeriod - new Delta period */ function setPeriods(uint32 newRewardPeriod, uint32 newDeltaPeriod) external onlyOwner { require( newRewardPeriod >= newDeltaPeriod && newRewardPeriod - newDeltaPeriod >= checkTime, "Incorrect Periods" ); rewardPeriod = newRewardPeriod; deltaPeriod = newDeltaPeriod; } /** * Set new check time. This function only for tests. * @param newCheckTime - new check time */ function setCheckTime(uint newCheckTime) external onlyOwner { require(rewardPeriod - deltaPeriod >= checkTime, "Incorrect check time"); checkTime = newCheckTime; } /** * Set latency new one in ms, run only by owner. This function * only for tests. * @param newAllowableLatency - new Allowable Latency */ function setLatency(uint32 newAllowableLatency) external onlyOwner { allowableLatency = newAllowableLatency; } function setMSR(uint newMSR) external onlyOwner { msr = newMSR; } function setLaunchTimestamp(uint timestamp) external onlyOwner { require(now < launchTimestamp, "Can't set network launch timestamp because network is already launched"); launchTimestamp = timestamp; } function setRotationDelay(uint newDelay) external onlyOwner { rotationDelay = newDelay; } function setProofOfUseLockUpPeriod(uint periodDays) external onlyOwner { proofOfUseLockUpPeriodDays = periodDays; } function setProofOfUseDelegationPercentage(uint percentage) external onlyOwner { require(percentage <= 100, "Percentage value is incorrect"); proofOfUseDelegationPercentage = percentage; } function setLimitValidatorsPerDelegator(uint newLimit) external onlyOwner { limitValidatorsPerDelegator = newLimit; } function setSchainCreationTimeStamp(uint timestamp) external onlyOwner { schainCreationTimeStamp = timestamp; } function setMinimalSchainLifetime(uint lifetime) external onlyOwner { minimalSchainLifetime = lifetime; } /** * @dev constructor in Permissions approach * @param contractsAddress needed in Permissions constructor */ function initialize(address contractsAddress) public override initializer { Permissions.initialize(contractsAddress); msr = 0; rewardPeriod = 2592000; allowableLatency = 150000; deltaPeriod = 3600; checkTime = 300; launchTimestamp = uint(-1); rotationDelay = 12 hours; proofOfUseLockUpPeriodDays = 90; proofOfUseDelegationPercentage = 50; limitValidatorsPerDelegator = 20; firstDelegationsMonth = 0; } } contract DelegationController is Permissions, ILocker { using MathUtils for uint; using PartialDifferences for PartialDifferences.Sequence; using PartialDifferences for PartialDifferences.Value; using FractionUtils for FractionUtils.Fraction; enum State { PROPOSED, ACCEPTED, CANCELED, REJECTED, DELEGATED, UNDELEGATION_REQUESTED, COMPLETED } struct Delegation { address holder; // address of token owner uint validatorId; uint amount; uint delegationPeriod; uint created; // time of delegation creation uint started; // month when a delegation becomes active uint finished; // first month after a delegation ends string info; } struct SlashingLogEvent { FractionUtils.Fraction reducingCoefficient; uint nextMonth; } struct SlashingLog { // month => slashing event mapping (uint => SlashingLogEvent) slashes; uint firstMonth; uint lastMonth; } struct DelegationExtras { uint lastSlashingMonthBeforeDelegation; } struct SlashingEvent { FractionUtils.Fraction reducingCoefficient; uint validatorId; uint month; } struct SlashingSignal { address holder; uint penalty; } struct LockedInPending { uint amount; uint month; } struct FirstDelegationMonth { // month uint value; //validatorId => month mapping (uint => uint) byValidator; } struct ValidatorsStatistics { // number of validators uint number; //validatorId => bool - is Delegated or not mapping (uint => uint) delegated; } /** * @dev Emitted when a delegation is proposed to a validator. */ event DelegationProposed( uint delegationId ); /** * @dev Emitted when a delegation is accepted by a validator. */ event DelegationAccepted( uint delegationId ); /** * @dev Emitted when a delegation is cancelled by the delegator. */ event DelegationRequestCanceledByUser( uint delegationId ); /** * @dev Emitted when a delegation is requested to undelegate. */ event UndelegationRequested( uint delegationId ); /// @dev delegations will never be deleted to index in this array may be used like delegation id Delegation[] public delegations; // validatorId => delegationId[] mapping (uint => uint[]) public delegationsByValidator; // holder => delegationId[] mapping (address => uint[]) public delegationsByHolder; // delegationId => extras mapping(uint => DelegationExtras) private _delegationExtras; // validatorId => sequence mapping (uint => PartialDifferences.Value) private _delegatedToValidator; // validatorId => sequence mapping (uint => PartialDifferences.Sequence) private _effectiveDelegatedToValidator; // validatorId => slashing log mapping (uint => SlashingLog) private _slashesOfValidator; // holder => sequence mapping (address => PartialDifferences.Value) private _delegatedByHolder; // holder => validatorId => sequence mapping (address => mapping (uint => PartialDifferences.Value)) private _delegatedByHolderToValidator; // holder => validatorId => sequence mapping (address => mapping (uint => PartialDifferences.Sequence)) private _effectiveDelegatedByHolderToValidator; SlashingEvent[] private _slashes; // holder => index in _slashes; mapping (address => uint) private _firstUnprocessedSlashByHolder; // holder => validatorId => month mapping (address => FirstDelegationMonth) private _firstDelegationMonth; // holder => locked in pending mapping (address => LockedInPending) private _lockedInPendingDelegations; mapping (address => ValidatorsStatistics) private _numberOfValidatorsPerDelegator; /** * @dev Modifier to make a function callable only if delegation exists. */ modifier checkDelegationExists(uint delegationId) { require(delegationId < delegations.length, "Delegation does not exist"); _; } function getAndUpdateDelegatedToValidatorNow(uint validatorId) external returns (uint) { return getAndUpdateDelegatedToValidator(validatorId, _getCurrentMonth()); } function getAndUpdateDelegatedAmount(address holder) external returns (uint) { return _getAndUpdateDelegatedByHolder(holder); } function getAndUpdateEffectiveDelegatedByHolderToValidator(address holder, uint validatorId, uint month) external allow("Distributor") returns (uint effectiveDelegated) { SlashingSignal[] memory slashingSignals = _processAllSlashesWithoutSignals(holder); effectiveDelegated = _effectiveDelegatedByHolderToValidator[holder][validatorId] .getAndUpdateValueInSequence(month); _sendSlashingSignals(slashingSignals); } /** * @dev Allows a token holder to create a delegation proposal of an `amount` * and `delegationPeriod` to a `validatorId`. Delegation must be accepted * by the validator before the UTC start of the month, otherwise the * delegation will be rejected. * * The token holder may add additional information in each proposal. * * @param validatorId uint ID of validator to receive delegation proposal * @param amount uint amount of proposed delegation * @param delegationPeriod uint period of proposed delegation * @param info string extra information provided by the token holder (if any) */ function delegate( uint validatorId, uint amount, uint delegationPeriod, string calldata info ) external { ValidatorService validatorService = ValidatorService(contractManager.getContract("ValidatorService")); DelegationPeriodManager delegationPeriodManager = DelegationPeriodManager( contractManager.getContract("DelegationPeriodManager")); IERC777 skaleToken = IERC777(contractManager.getContract("SkaleToken")); TokenState tokenState = TokenState(contractManager.getContract("TokenState")); require( validatorService.checkMinimumDelegation(validatorId, amount), "Amount does not meet the validator's minimum delegation amount"); require( validatorService.isAuthorizedValidator(validatorId), "Validator is not authorized to accept delegation request"); require( delegationPeriodManager.isDelegationPeriodAllowed(delegationPeriod), "This delegation period is not allowed"); require( validatorService.isAcceptingNewRequests(validatorId), "The validator is not currently accepting new requests"); _checkIfDelegationIsAllowed(msg.sender, validatorId); SlashingSignal[] memory slashingSignals = _processAllSlashesWithoutSignals(msg.sender); uint delegationId = _addDelegation( msg.sender, validatorId, amount, delegationPeriod, info); // check that there is enough money uint holderBalance = skaleToken.balanceOf(msg.sender); uint forbiddenForDelegation = tokenState.getAndUpdateForbiddenForDelegationAmount(msg.sender); require(holderBalance >= forbiddenForDelegation, "Token holder does not have enough tokens to delegate"); emit DelegationProposed(delegationId); _sendSlashingSignals(slashingSignals); } /** * @dev See ILocker. */ function getAndUpdateLockedAmount(address wallet) external override returns (uint) { return _getAndUpdateLockedAmount(wallet); } /** * @dev See ILocker. */ function getAndUpdateForbiddenForDelegationAmount(address wallet) external override returns (uint) { return _getAndUpdateLockedAmount(wallet); } /** * @dev Allows a token holder to cancel a delegation proposal. * * Requirements: * * - the sender must be the token holder of the delegation proposal. * - the delegation must still be in a PROPOSED state. * * Emits a DelegationRequestCanceledByUser event. * * @param delegationId uint ID of delegation proposal */ function cancelPendingDelegation(uint delegationId) external checkDelegationExists(delegationId) { require(msg.sender == delegations[delegationId].holder, "Only token holders can cancel delegation request"); require(getState(delegationId) == State.PROPOSED, "Token holders are only able to cancel PROPOSED delegations"); delegations[delegationId].finished = _getCurrentMonth(); _subtractFromLockedInPendingDelegations(delegations[delegationId].holder, delegations[delegationId].amount); emit DelegationRequestCanceledByUser(delegationId); } /** * @dev Allows a validator to accept a proposed delegation. * Successful acceptance of delegations transition the tokens from a * PROPOSED state to ACCEPTED, and tokens are locked for the remainder of the * delegation period. * * Emits a DelegationAccepted event. * * @param delegationId uint ID of delegation proposal */ function acceptPendingDelegation(uint delegationId) external checkDelegationExists(delegationId) { ValidatorService validatorService = ValidatorService(contractManager.getContract("ValidatorService")); require( validatorService.checkValidatorAddressToId(msg.sender, delegations[delegationId].validatorId), "No permissions to accept request"); _checkIfDelegationIsAllowed(delegations[delegationId].holder, delegations[delegationId].validatorId); State currentState = getState(delegationId); if (currentState != State.PROPOSED) { if (currentState == State.ACCEPTED || currentState == State.DELEGATED || currentState == State.UNDELEGATION_REQUESTED || currentState == State.COMPLETED) { revert("The delegation has been already accepted"); } else if (currentState == State.CANCELED) { revert("The delegation has been cancelled by token holder"); } else if (currentState == State.REJECTED) { revert("The delegation request is outdated"); } } require(currentState == State.PROPOSED, "Cannot set delegation state to accepted"); TokenLaunchLocker tokenLaunchLocker = TokenLaunchLocker(contractManager.getContract("TokenLaunchLocker")); SlashingSignal[] memory slashingSignals = _processAllSlashesWithoutSignals(delegations[delegationId].holder); _addToAllStatistics(delegationId); tokenLaunchLocker.handleDelegationAdd( delegations[delegationId].holder, delegationId, delegations[delegationId].amount, delegations[delegationId].started); _sendSlashingSignals(slashingSignals); emit DelegationAccepted(delegationId); } /** * @dev Allows a delegator to undelegate a specific delegation. * * Requirements: * * - the sender must be the delegator. * - the delegation must be in DELEGATED state. * * Emits an UndelegationRequested event. * * @param delegationId uint ID of delegation to undelegate */ function requestUndelegation(uint delegationId) external checkDelegationExists(delegationId) { require(getState(delegationId) == State.DELEGATED, "Cannot request undelegation"); ValidatorService validatorService = ValidatorService(contractManager.getContract("ValidatorService")); require( delegations[delegationId].holder == msg.sender || (validatorService.validatorAddressExists(msg.sender) && delegations[delegationId].validatorId == validatorService.getValidatorId(msg.sender)), "Permission denied to request undelegation"); TokenLaunchLocker tokenLaunchLocker = TokenLaunchLocker(contractManager.getContract("TokenLaunchLocker")); DelegationPeriodManager delegationPeriodManager = DelegationPeriodManager( contractManager.getContract("DelegationPeriodManager")); _removeValidatorFromValidatorsPerDelegators( delegations[delegationId].holder, delegations[delegationId].validatorId ); processAllSlashes(msg.sender); delegations[delegationId].finished = _calculateDelegationEndMonth(delegationId); uint amountAfterSlashing = _calculateDelegationAmountAfterSlashing(delegationId); _removeFromDelegatedToValidator( delegations[delegationId].validatorId, amountAfterSlashing, delegations[delegationId].finished); _removeFromDelegatedByHolder( delegations[delegationId].holder, amountAfterSlashing, delegations[delegationId].finished); _removeFromDelegatedByHolderToValidator( delegations[delegationId].holder, delegations[delegationId].validatorId, amountAfterSlashing, delegations[delegationId].finished); uint effectiveAmount = amountAfterSlashing.mul(delegationPeriodManager.stakeMultipliers( delegations[delegationId].delegationPeriod)); _removeFromEffectiveDelegatedToValidator( delegations[delegationId].validatorId, effectiveAmount, delegations[delegationId].finished); _removeFromEffectiveDelegatedByHolderToValidator( delegations[delegationId].holder, delegations[delegationId].validatorId, effectiveAmount, delegations[delegationId].finished); tokenLaunchLocker.handleDelegationRemoving( delegations[delegationId].holder, delegationId, delegations[delegationId].finished); emit UndelegationRequested(delegationId); } /** * @dev Allows the Punisher to confiscate an `amount` of stake from * `validatorId` by slashing. This slashes all delegations of the validator, * which reduces the amount that the validator has staked. This consequence * may force the SKALE Manger to reduce the number of nodes a validator is * operating so the validator can meet the Minimum Staking Requirement. * * See Punisher. * * Emits a SlashingEvent. * * @param validatorId uint validator to slash * @param amount uint amount to slash * */ function confiscate(uint validatorId, uint amount) external allow("Punisher") { uint currentMonth = _getCurrentMonth(); FractionUtils.Fraction memory coefficient = _delegatedToValidator[validatorId].reduceValue(amount, currentMonth); _effectiveDelegatedToValidator[validatorId].reduceSequence(coefficient, currentMonth); _putToSlashingLog(_slashesOfValidator[validatorId], coefficient, currentMonth); _slashes.push(SlashingEvent({reducingCoefficient: coefficient, validatorId: validatorId, month: currentMonth})); } function getAndUpdateEffectiveDelegatedToValidator(uint validatorId, uint month) external allow("Distributor") returns (uint) { return _effectiveDelegatedToValidator[validatorId].getAndUpdateValueInSequence(month); } function getAndUpdateDelegatedByHolderToValidatorNow(address holder, uint validatorId) external returns (uint) { return _getAndUpdateDelegatedByHolderToValidator(holder, validatorId, _getCurrentMonth()); } function getDelegation(uint delegationId) external view checkDelegationExists(delegationId) returns (Delegation memory) { return delegations[delegationId]; } function getFirstDelegationMonth(address holder, uint validatorId) external view returns(uint) { return _firstDelegationMonth[holder].byValidator[validatorId]; } function getDelegationsByValidatorLength(uint validatorId) external view returns (uint) { return delegationsByValidator[validatorId].length; } function getDelegationsByHolderLength(address holder) external view returns (uint) { return delegationsByHolder[holder].length; } function initialize(address contractsAddress) public override initializer { Permissions.initialize(contractsAddress); } function getAndUpdateDelegatedToValidator(uint validatorId, uint month) public allow("Nodes") returns (uint) { return _delegatedToValidator[validatorId].getAndUpdateValue(month); } function processSlashes(address holder, uint limit) public { _sendSlashingSignals(_processSlashesWithoutSignals(holder, limit)); } function processAllSlashes(address holder) public { processSlashes(holder, 0); } /** * @dev Returns the token state of a given delegation. * * @param delegationId uint ID of the delegation */ function getState(uint delegationId) public view checkDelegationExists(delegationId) returns (State state) { if (delegations[delegationId].started == 0) { if (delegations[delegationId].finished == 0) { TimeHelpers timeHelpers = TimeHelpers(contractManager.getContract("TimeHelpers")); if (_getCurrentMonth() == timeHelpers.timestampToMonth(delegations[delegationId].created)) { return State.PROPOSED; } else { return State.REJECTED; } } else { return State.CANCELED; } } else { if (_getCurrentMonth() < delegations[delegationId].started) { return State.ACCEPTED; } else { if (delegations[delegationId].finished == 0) { return State.DELEGATED; } else { if (_getCurrentMonth() < delegations[delegationId].finished) { return State.UNDELEGATION_REQUESTED; } else { return State.COMPLETED; } } } } } function getLockedInPendingDelegations(address holder) public view returns (uint) { uint currentMonth = _getCurrentMonth(); if (_lockedInPendingDelegations[holder].month < currentMonth) { return 0; } else { return _lockedInPendingDelegations[holder].amount; } } function hasUnprocessedSlashes(address holder) public view returns (bool) { return _everDelegated(holder) && _firstUnprocessedSlashByHolder[holder] < _slashes.length; } // private function _addDelegation( address holder, uint validatorId, uint amount, uint delegationPeriod, string memory info ) private returns (uint delegationId) { delegationId = delegations.length; delegations.push(Delegation( holder, validatorId, amount, delegationPeriod, now, 0, 0, info )); delegationsByValidator[validatorId].push(delegationId); delegationsByHolder[holder].push(delegationId); _addToLockedInPendingDelegations(delegations[delegationId].holder, delegations[delegationId].amount); } function _calculateDelegationEndMonth(uint delegationId) private view returns (uint) { uint currentMonth = _getCurrentMonth(); uint started = delegations[delegationId].started; if (currentMonth < started) { return started.add(delegations[delegationId].delegationPeriod); } else { uint completedPeriods = currentMonth.sub(started).div(delegations[delegationId].delegationPeriod); return started.add(completedPeriods.add(1).mul(delegations[delegationId].delegationPeriod)); } } function _addToDelegatedToValidator(uint validatorId, uint amount, uint month) private { _delegatedToValidator[validatorId].addToValue(amount, month); } function _addToEffectiveDelegatedToValidator(uint validatorId, uint effectiveAmount, uint month) private { _effectiveDelegatedToValidator[validatorId].addToSequence(effectiveAmount, month); } function _addToDelegatedByHolder(address holder, uint amount, uint month) private { _delegatedByHolder[holder].addToValue(amount, month); } function _addToDelegatedByHolderToValidator( address holder, uint validatorId, uint amount, uint month) private { _delegatedByHolderToValidator[holder][validatorId].addToValue(amount, month); } function _addValidatorToValidatorsPerDelegators(address holder, uint validatorId) private { if (_numberOfValidatorsPerDelegator[holder].delegated[validatorId] == 0) { _numberOfValidatorsPerDelegator[holder].number = _numberOfValidatorsPerDelegator[holder].number.add(1); } _numberOfValidatorsPerDelegator[holder]. delegated[validatorId] = _numberOfValidatorsPerDelegator[holder].delegated[validatorId].add(1); } function _removeFromDelegatedByHolder(address holder, uint amount, uint month) private { _delegatedByHolder[holder].subtractFromValue(amount, month); } function _removeFromDelegatedByHolderToValidator( address holder, uint validatorId, uint amount, uint month) private { _delegatedByHolderToValidator[holder][validatorId].subtractFromValue(amount, month); } function _removeValidatorFromValidatorsPerDelegators(address holder, uint validatorId) private { if (_numberOfValidatorsPerDelegator[holder].delegated[validatorId] == 1) { _numberOfValidatorsPerDelegator[holder].number = _numberOfValidatorsPerDelegator[holder].number.sub(1); } _numberOfValidatorsPerDelegator[holder]. delegated[validatorId] = _numberOfValidatorsPerDelegator[holder].delegated[validatorId].sub(1); } function _addToEffectiveDelegatedByHolderToValidator( address holder, uint validatorId, uint effectiveAmount, uint month) private { _effectiveDelegatedByHolderToValidator[holder][validatorId].addToSequence(effectiveAmount, month); } function _removeFromEffectiveDelegatedByHolderToValidator( address holder, uint validatorId, uint effectiveAmount, uint month) private { _effectiveDelegatedByHolderToValidator[holder][validatorId].subtractFromSequence(effectiveAmount, month); } function _getAndUpdateDelegatedByHolder(address holder) private returns (uint) { uint currentMonth = _getCurrentMonth(); processAllSlashes(holder); return _delegatedByHolder[holder].getAndUpdateValue(currentMonth); } function _getAndUpdateDelegatedByHolderToValidator( address holder, uint validatorId, uint month) private returns (uint) { return _delegatedByHolderToValidator[holder][validatorId].getAndUpdateValue(month); } function _addToLockedInPendingDelegations(address holder, uint amount) private returns (uint) { uint currentMonth = _getCurrentMonth(); if (_lockedInPendingDelegations[holder].month < currentMonth) { _lockedInPendingDelegations[holder].amount = amount; _lockedInPendingDelegations[holder].month = currentMonth; } else { assert(_lockedInPendingDelegations[holder].month == currentMonth); _lockedInPendingDelegations[holder].amount = _lockedInPendingDelegations[holder].amount.add(amount); } } function _subtractFromLockedInPendingDelegations(address holder, uint amount) private returns (uint) { uint currentMonth = _getCurrentMonth(); require( _lockedInPendingDelegations[holder].month == currentMonth, "There are no delegation requests this month"); require(_lockedInPendingDelegations[holder].amount >= amount, "Unlocking amount is too big"); _lockedInPendingDelegations[holder].amount = _lockedInPendingDelegations[holder].amount.sub(amount); } function _getCurrentMonth() private view returns (uint) { TimeHelpers timeHelpers = TimeHelpers(contractManager.getContract("TimeHelpers")); return timeHelpers.getCurrentMonth(); } function _getAndUpdateLockedAmount(address wallet) private returns (uint) { return _getAndUpdateDelegatedByHolder(wallet).add(getLockedInPendingDelegations(wallet)); } function _updateFirstDelegationMonth(address holder, uint validatorId, uint month) private { if (_firstDelegationMonth[holder].value == 0) { _firstDelegationMonth[holder].value = month; _firstUnprocessedSlashByHolder[holder] = _slashes.length; } if (_firstDelegationMonth[holder].byValidator[validatorId] == 0) { _firstDelegationMonth[holder].byValidator[validatorId] = month; } } function _everDelegated(address holder) private view returns (bool) { return _firstDelegationMonth[holder].value > 0; } function _removeFromDelegatedToValidator(uint validatorId, uint amount, uint month) private { _delegatedToValidator[validatorId].subtractFromValue(amount, month); } function _removeFromEffectiveDelegatedToValidator(uint validatorId, uint effectiveAmount, uint month) private { _effectiveDelegatedToValidator[validatorId].subtractFromSequence(effectiveAmount, month); } function _calculateDelegationAmountAfterSlashing(uint delegationId) private view returns (uint) { uint startMonth = _delegationExtras[delegationId].lastSlashingMonthBeforeDelegation; uint validatorId = delegations[delegationId].validatorId; uint amount = delegations[delegationId].amount; if (startMonth == 0) { startMonth = _slashesOfValidator[validatorId].firstMonth; if (startMonth == 0) { return amount; } } for (uint i = startMonth; i > 0 && i < delegations[delegationId].finished; i = _slashesOfValidator[validatorId].slashes[i].nextMonth) { if (i >= delegations[delegationId].started) { amount = amount .mul(_slashesOfValidator[validatorId].slashes[i].reducingCoefficient.numerator) .div(_slashesOfValidator[validatorId].slashes[i].reducingCoefficient.denominator); } } return amount; } function _putToSlashingLog( SlashingLog storage log, FractionUtils.Fraction memory coefficient, uint month) private { if (log.firstMonth == 0) { log.firstMonth = month; log.lastMonth = month; log.slashes[month].reducingCoefficient = coefficient; log.slashes[month].nextMonth = 0; } else { require(log.lastMonth <= month, "Cannot put slashing event in the past"); if (log.lastMonth == month) { log.slashes[month].reducingCoefficient = log.slashes[month].reducingCoefficient.multiplyFraction(coefficient); } else { log.slashes[month].reducingCoefficient = coefficient; log.slashes[month].nextMonth = 0; log.slashes[log.lastMonth].nextMonth = month; log.lastMonth = month; } } } function _processSlashesWithoutSignals(address holder, uint limit) private returns (SlashingSignal[] memory slashingSignals) { if (hasUnprocessedSlashes(holder)) { uint index = _firstUnprocessedSlashByHolder[holder]; uint end = _slashes.length; if (limit > 0 && index.add(limit) < end) { end = index.add(limit); } slashingSignals = new SlashingSignal[](end.sub(index)); uint begin = index; for (; index < end; ++index) { uint validatorId = _slashes[index].validatorId; uint month = _slashes[index].month; uint oldValue = _getAndUpdateDelegatedByHolderToValidator(holder, validatorId, month); if (oldValue.muchGreater(0)) { _delegatedByHolderToValidator[holder][validatorId].reduceValueByCoefficientAndUpdateSum( _delegatedByHolder[holder], _slashes[index].reducingCoefficient, month); _effectiveDelegatedByHolderToValidator[holder][validatorId].reduceSequence( _slashes[index].reducingCoefficient, month); slashingSignals[index.sub(begin)].holder = holder; slashingSignals[index.sub(begin)].penalty = oldValue.boundedSub(_getAndUpdateDelegatedByHolderToValidator(holder, validatorId, month)); } } _firstUnprocessedSlashByHolder[holder] = end; } } function _processAllSlashesWithoutSignals(address holder) private returns (SlashingSignal[] memory slashingSignals) { return _processSlashesWithoutSignals(holder, 0); } function _sendSlashingSignals(SlashingSignal[] memory slashingSignals) private { Punisher punisher = Punisher(contractManager.getContract("Punisher")); address previousHolder = address(0); uint accumulatedPenalty = 0; for (uint i = 0; i < slashingSignals.length; ++i) { if (slashingSignals[i].holder != previousHolder) { if (accumulatedPenalty > 0) { punisher.handleSlash(previousHolder, accumulatedPenalty); } previousHolder = slashingSignals[i].holder; accumulatedPenalty = slashingSignals[i].penalty; } else { accumulatedPenalty = accumulatedPenalty.add(slashingSignals[i].penalty); } } if (accumulatedPenalty > 0) { punisher.handleSlash(previousHolder, accumulatedPenalty); } } function _addToAllStatistics(uint delegationId) private { DelegationPeriodManager delegationPeriodManager = DelegationPeriodManager( contractManager.getContract("DelegationPeriodManager")); uint currentMonth = _getCurrentMonth(); delegations[delegationId].started = currentMonth.add(1); if (_slashesOfValidator[delegations[delegationId].validatorId].lastMonth > 0) { _delegationExtras[delegationId].lastSlashingMonthBeforeDelegation = _slashesOfValidator[delegations[delegationId].validatorId].lastMonth; } _addToDelegatedToValidator( delegations[delegationId].validatorId, delegations[delegationId].amount, currentMonth.add(1)); _addToDelegatedByHolder( delegations[delegationId].holder, delegations[delegationId].amount, currentMonth.add(1)); _addToDelegatedByHolderToValidator( delegations[delegationId].holder, delegations[delegationId].validatorId, delegations[delegationId].amount, currentMonth.add(1)); _updateFirstDelegationMonth( delegations[delegationId].holder, delegations[delegationId].validatorId, currentMonth.add(1)); uint effectiveAmount = delegations[delegationId].amount.mul(delegationPeriodManager.stakeMultipliers( delegations[delegationId].delegationPeriod)); _addToEffectiveDelegatedToValidator( delegations[delegationId].validatorId, effectiveAmount, currentMonth.add(1)); _addToEffectiveDelegatedByHolderToValidator( delegations[delegationId].holder, delegations[delegationId].validatorId, effectiveAmount, currentMonth.add(1)); _addValidatorToValidatorsPerDelegators( delegations[delegationId].holder, delegations[delegationId].validatorId ); } function _checkIfDelegationIsAllowed(address holder, uint validatorId) private view returns (bool) { ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); require( _numberOfValidatorsPerDelegator[holder].delegated[validatorId] > 0 || ( _numberOfValidatorsPerDelegator[holder].delegated[validatorId] == 0 && _numberOfValidatorsPerDelegator[holder].number < constantsHolder.limitValidatorsPerDelegator() ), "Limit of validators is reached" ); } } contract DelegationPeriodManager is Permissions { /** * @dev Emitted when a new delegation period is specified. */ event DelegationPeriodWasSet( uint length, uint stakeMultiplier ); mapping (uint => uint) public stakeMultipliers; /** * @dev Creates a new available delegation period and return in the network. * Only the owner may set new delegation period and returns in the network. * * Emits a DelegationPeriodWasSet event. * * @param monthsCount uint delegation duration in months * @param stakeMultiplier uint return for delegation */ function setDelegationPeriod(uint monthsCount, uint stakeMultiplier) external onlyOwner { stakeMultipliers[monthsCount] = stakeMultiplier; emit DelegationPeriodWasSet(monthsCount, stakeMultiplier); } /** * @dev Checks whether given delegation period is allowed. * * @param monthsCount uint delegation duration in months * @return bool True if delegation period is allowed */ function isDelegationPeriodAllowed(uint monthsCount) external view returns (bool) { return stakeMultipliers[monthsCount] != 0 ? true : false; } /** * @dev Initial delegation period and multiplier settings. */ function initialize(address contractsAddress) public override initializer { Permissions.initialize(contractsAddress); stakeMultipliers[3] = 100; // 3 months at 100 // stakeMultipliers[6] = 150; // 6 months at 150 // stakeMultipliers[12] = 200; // 12 months at 200 } } contract Distributor is Permissions, IERC777Recipient { using MathUtils for uint; /** * @dev Emitted when a bounty is withdrawn by the token holder. */ event WithdrawBounty( address holder, uint validatorId, address destination, uint amount ); /** * @dev Emitted when a validator fee is withdrawn by the validator. */ event WithdrawFee( uint validatorId, address destination, uint amount ); /** * @dev Emitted when a bounty is distributed. */ event BountyWasPaid( uint validatorId, uint amount ); IERC1820Registry private _erc1820; // validatorId => month => token mapping (uint => mapping (uint => uint)) private _bountyPaid; // validatorId => month => token mapping (uint => mapping (uint => uint)) private _feePaid; // holder => validatorId => month mapping (address => mapping (uint => uint)) private _firstUnwithdrawnMonth; // validatorId => month mapping (uint => uint) private _firstUnwithdrawnMonthForValidator; function getAndUpdateEarnedBountyAmount(uint validatorId) external returns (uint earned, uint endMonth) { return getAndUpdateEarnedBountyAmountOf(msg.sender, validatorId); } function withdrawBounty(uint validatorId, address to) external { TimeHelpers timeHelpers = TimeHelpers(contractManager.getContract("TimeHelpers")); ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); require(now >= timeHelpers.addMonths( constantsHolder.launchTimestamp(), constantsHolder.BOUNTY_LOCKUP_MONTHS() ), "Bounty is locked"); uint bounty; uint endMonth; (bounty, endMonth) = getAndUpdateEarnedBountyAmountOf(msg.sender, validatorId); _firstUnwithdrawnMonth[msg.sender][validatorId] = endMonth; IERC20 skaleToken = IERC20(contractManager.getContract("SkaleToken")); require(skaleToken.transfer(to, bounty), "Failed to transfer tokens"); emit WithdrawBounty( msg.sender, validatorId, to, bounty ); } function withdrawFee(address to) external { ValidatorService validatorService = ValidatorService(contractManager.getContract("ValidatorService")); IERC20 skaleToken = IERC20(contractManager.getContract("SkaleToken")); TimeHelpers timeHelpers = TimeHelpers(contractManager.getContract("TimeHelpers")); ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); require(now >= timeHelpers.addMonths( constantsHolder.launchTimestamp(), constantsHolder.BOUNTY_LOCKUP_MONTHS() ), "Bounty is locked"); // check Validator Exist inside getValidatorId uint validatorId = validatorService.getValidatorId(msg.sender); uint fee; uint endMonth; (fee, endMonth) = getEarnedFeeAmountOf(validatorId); _firstUnwithdrawnMonthForValidator[validatorId] = endMonth; require(skaleToken.transfer(to, fee), "Failed to transfer tokens"); emit WithdrawFee( validatorId, to, fee ); } function tokensReceived( address, address, address to, uint256 amount, bytes calldata userData, bytes calldata ) external override allow("SkaleToken") { require(to == address(this), "Receiver is incorrect"); require(userData.length == 32, "Data length is incorrect"); uint validatorId = abi.decode(userData, (uint)); _distributeBounty(amount, validatorId); } function getEarnedFeeAmount() external view returns (uint earned, uint endMonth) { ValidatorService validatorService = ValidatorService(contractManager.getContract("ValidatorService")); return getEarnedFeeAmountOf(validatorService.getValidatorId(msg.sender)); } function initialize(address contractsAddress) public override initializer { Permissions.initialize(contractsAddress); _erc1820 = IERC1820Registry(0x1820a4B7618BdE71Dce8cdc73aAB6C95905faD24); _erc1820.setInterfaceImplementer(address(this), keccak256("ERC777TokensRecipient"), address(this)); } function getAndUpdateEarnedBountyAmountOf(address wallet, uint validatorId) public returns (uint earned, uint endMonth) { DelegationController delegationController = DelegationController( contractManager.getContract("DelegationController")); TimeHelpers timeHelpers = TimeHelpers(contractManager.getContract("TimeHelpers")); uint currentMonth = timeHelpers.getCurrentMonth(); uint startMonth = _firstUnwithdrawnMonth[wallet][validatorId]; if (startMonth == 0) { startMonth = delegationController.getFirstDelegationMonth(wallet, validatorId); if (startMonth == 0) { return (0, 0); } } earned = 0; endMonth = currentMonth; if (endMonth > startMonth.add(12)) { endMonth = startMonth.add(12); } for (uint i = startMonth; i < endMonth; ++i) { uint effectiveDelegatedToValidator = delegationController.getAndUpdateEffectiveDelegatedToValidator(validatorId, i); if (effectiveDelegatedToValidator.muchGreater(0)) { earned = earned.add( _bountyPaid[validatorId][i].mul( delegationController.getAndUpdateEffectiveDelegatedByHolderToValidator(wallet, validatorId, i)) .div(effectiveDelegatedToValidator) ); } } } function getEarnedFeeAmountOf(uint validatorId) public view returns (uint earned, uint endMonth) { TimeHelpers timeHelpers = TimeHelpers(contractManager.getContract("TimeHelpers")); uint currentMonth = timeHelpers.getCurrentMonth(); uint startMonth = _firstUnwithdrawnMonthForValidator[validatorId]; if (startMonth == 0) { return (0, 0); } earned = 0; endMonth = currentMonth; if (endMonth > startMonth.add(12)) { endMonth = startMonth.add(12); } for (uint i = startMonth; i < endMonth; ++i) { earned = earned.add(_feePaid[validatorId][i]); } } // private function _distributeBounty(uint amount, uint validatorId) private { TimeHelpers timeHelpers = TimeHelpers(contractManager.getContract("TimeHelpers")); ValidatorService validatorService = ValidatorService(contractManager.getContract("ValidatorService")); uint currentMonth = timeHelpers.getCurrentMonth(); uint feeRate = validatorService.getValidator(validatorId).feeRate; uint fee = amount.mul(feeRate).div(1000); uint bounty = amount.sub(fee); _bountyPaid[validatorId][currentMonth] = _bountyPaid[validatorId][currentMonth].add(bounty); _feePaid[validatorId][currentMonth] = _feePaid[validatorId][currentMonth].add(fee); if (_firstUnwithdrawnMonthForValidator[validatorId] == 0) { _firstUnwithdrawnMonthForValidator[validatorId] = currentMonth; } emit BountyWasPaid(validatorId, amount); } } contract KeyStorage is Permissions { using Fp2Operations for Fp2Operations.Fp2Point; using G2Operations for G2Operations.G2Point; struct BroadcastedData { KeyShare[] secretKeyContribution; G2Operations.G2Point[] verificationVector; } struct KeyShare { bytes32[2] publicKey; bytes32 share; } // Unused variable!! mapping(bytes32 => mapping(uint => BroadcastedData)) private _data; // mapping(bytes32 => G2Operations.G2Point) private _publicKeysInProgress; mapping(bytes32 => G2Operations.G2Point) private _schainsPublicKeys; // Unused variable mapping(bytes32 => G2Operations.G2Point[]) private _schainsNodesPublicKeys; // mapping(bytes32 => G2Operations.G2Point[]) private _previousSchainsPublicKeys; function deleteKey(bytes32 groupIndex) external allow("SkaleDKG") { _previousSchainsPublicKeys[groupIndex].push(_schainsPublicKeys[groupIndex]); delete _schainsPublicKeys[groupIndex]; } function initPublicKeyInProgress(bytes32 groupIndex) external allow("SkaleDKG") { _publicKeysInProgress[groupIndex] = G2Operations.getG2Zero(); } function adding(bytes32 groupIndex, G2Operations.G2Point memory value) external allow("SkaleDKG") { require(value.isG2(), "Incorrect g2 point"); _publicKeysInProgress[groupIndex] = value.addG2(_publicKeysInProgress[groupIndex]); } function finalizePublicKey(bytes32 groupIndex) external allow("SkaleDKG") { if (!_isSchainsPublicKeyZero(groupIndex)) { _previousSchainsPublicKeys[groupIndex].push(_schainsPublicKeys[groupIndex]); } _schainsPublicKeys[groupIndex] = _publicKeysInProgress[groupIndex]; delete _publicKeysInProgress[groupIndex]; } function getCommonPublicKey(bytes32 groupIndex) external view returns (G2Operations.G2Point memory) { return _schainsPublicKeys[groupIndex]; } function getPreviousPublicKey(bytes32 groupIndex) external view returns (G2Operations.G2Point memory) { uint length = _previousSchainsPublicKeys[groupIndex].length; if (length == 0) { return G2Operations.getG2Zero(); } return _previousSchainsPublicKeys[groupIndex][length - 1]; } function getAllPreviousPublicKeys(bytes32 groupIndex) external view returns (G2Operations.G2Point[] memory) { return _previousSchainsPublicKeys[groupIndex]; } function initialize(address contractsAddress) public override initializer { Permissions.initialize(contractsAddress); } function _isSchainsPublicKeyZero(bytes32 schainId) private view returns (bool) { return _schainsPublicKeys[schainId].x.a == 0 && _schainsPublicKeys[schainId].x.b == 0 && _schainsPublicKeys[schainId].y.a == 0 && _schainsPublicKeys[schainId].y.b == 0; } function _getData() private view returns (BroadcastedData memory) { return _data[keccak256(abi.encodePacked("UnusedFunction"))][0]; } function _getNodesPublicKey() private view returns (G2Operations.G2Point memory) { return _schainsNodesPublicKeys[keccak256(abi.encodePacked("UnusedFunction"))][0]; } } contract Monitors is Permissions { using StringUtils for string; using SafeCast for uint; struct Verdict { uint toNodeIndex; uint32 downtime; uint32 latency; } struct CheckedNode { uint nodeIndex; uint time; } struct CheckedNodeWithIp { uint nodeIndex; uint time; bytes4 ip; } mapping (bytes32 => CheckedNode[]) public checkedNodes; mapping (bytes32 => uint[][]) public verdicts; mapping (bytes32 => uint[]) public groupsForMonitors; mapping (bytes32 => uint) public lastVerdictBlocks; mapping (bytes32 => uint) public lastBountyBlocks; event MonitorCreated( uint nodeIndex, bytes32 monitorIndex, uint numberOfMonitors, uint[] nodesInGroup, uint time, uint gasSpend ); event VerdictWasSent( uint indexed fromMonitorIndex, uint indexed toNodeIndex, uint32 downtime, uint32 latency, bool status, uint previousBlockEvent, uint time, uint gasSpend ); event MetricsWereCalculated( uint forNodeIndex, uint32 averageDowntime, uint32 averageLatency, uint time, uint gasSpend ); event PeriodsWereSet( uint rewardPeriod, uint deltaPeriod, uint time, uint gasSpend ); event MonitorRotated( bytes32 monitorIndex, uint newNode ); /** * addMonitor - setup monitors of node */ function addMonitor(uint nodeIndex) external allow("SkaleManager") { ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); bytes32 monitorIndex = keccak256(abi.encodePacked(nodeIndex)); _generateGroup(monitorIndex, nodeIndex, constantsHolder.NUMBER_OF_MONITORS()); CheckedNode memory checkedNode = _getCheckedNodeData(nodeIndex); for (uint i = 0; i < groupsForMonitors[monitorIndex].length; i++) { bytes32 index = keccak256(abi.encodePacked(groupsForMonitors[monitorIndex][i])); addCheckedNode(index, checkedNode); } emit MonitorCreated( nodeIndex, monitorIndex, groupsForMonitors[monitorIndex].length, groupsForMonitors[monitorIndex], block.timestamp, gasleft() ); } function deleteMonitor(uint nodeIndex) external allow("SkaleManager") { bytes32 monitorIndex = keccak256(abi.encodePacked(nodeIndex)); while (verdicts[keccak256(abi.encodePacked(nodeIndex))].length > 0) { verdicts[keccak256(abi.encodePacked(nodeIndex))].pop(); } uint[] memory nodesInGroup = groupsForMonitors[monitorIndex]; uint index; bytes32 monitoringIndex; for (uint i = 0; i < nodesInGroup.length; i++) { monitoringIndex = keccak256(abi.encodePacked(nodesInGroup[i])); (index, ) = _find(monitoringIndex, nodeIndex); if (index < checkedNodes[monitoringIndex].length) { if (index != checkedNodes[monitoringIndex].length.sub(1)) { checkedNodes[monitoringIndex][index] = checkedNodes[monitoringIndex][checkedNodes[monitoringIndex].length.sub(1)]; } checkedNodes[monitoringIndex].pop(); } } delete groupsForMonitors[monitorIndex]; } function removeCheckedNodes(uint nodeIndex) external allow("SkaleManager") { bytes32 monitorIndex = keccak256(abi.encodePacked(nodeIndex)); delete checkedNodes[monitorIndex]; } function sendVerdict(uint fromMonitorIndex, Verdict calldata verdict) external allow("SkaleManager") { uint index; uint time; bytes32 monitorIndex = keccak256(abi.encodePacked(fromMonitorIndex)); (index, time) = _find(monitorIndex, verdict.toNodeIndex); require(time > 0, "Checked Node does not exist in MonitorsArray"); if (time <= block.timestamp) { if (index != checkedNodes[monitorIndex].length.sub(1)) { checkedNodes[monitorIndex][index] = checkedNodes[monitorIndex][checkedNodes[monitorIndex].length.sub(1)]; } delete checkedNodes[monitorIndex][checkedNodes[monitorIndex].length.sub(1)]; checkedNodes[monitorIndex].pop(); ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); bool receiveVerdict = time.add(constantsHolder.deltaPeriod()) > block.timestamp; if (receiveVerdict) { verdicts[keccak256(abi.encodePacked(verdict.toNodeIndex))].push( [uint(verdict.downtime), uint(verdict.latency)] ); } _emitVerdictsEvent(fromMonitorIndex, verdict, receiveVerdict); } } function calculateMetrics(uint nodeIndex) external allow("SkaleManager") returns (uint averageDowntime, uint averageLatency) { bytes32 monitorIndex = keccak256(abi.encodePacked(nodeIndex)); uint lengthOfArray = getLengthOfMetrics(monitorIndex); uint[] memory downtimeArray = new uint[](lengthOfArray); uint[] memory latencyArray = new uint[](lengthOfArray); for (uint i = 0; i < lengthOfArray; i++) { downtimeArray[i] = verdicts[monitorIndex][i][0]; latencyArray[i] = verdicts[monitorIndex][i][1]; } if (lengthOfArray > 0) { averageDowntime = _median(downtimeArray); averageLatency = _median(latencyArray); } delete verdicts[monitorIndex]; } function setLastBountyBlock(uint nodeIndex) external allow("SkaleManager") { lastBountyBlocks[keccak256(abi.encodePacked(nodeIndex))] = block.number; } function getCheckedArray(bytes32 monitorIndex) external view returns (CheckedNodeWithIp[] memory checkedNodesWithIp) { Nodes nodes = Nodes(contractManager.getContract("Nodes")); checkedNodesWithIp = new CheckedNodeWithIp[](checkedNodes[monitorIndex].length); for (uint i = 0; i < checkedNodes[monitorIndex].length; ++i) { checkedNodesWithIp[i].nodeIndex = checkedNodes[monitorIndex][i].nodeIndex; checkedNodesWithIp[i].time = checkedNodes[monitorIndex][i].time; checkedNodesWithIp[i].ip = nodes.getNodeIP(checkedNodes[monitorIndex][i].nodeIndex); } } function getLastBountyBlock(uint nodeIndex) external view returns (uint) { return lastBountyBlocks[keccak256(abi.encodePacked(nodeIndex))]; } function getNodesInGroup(bytes32 monitorIndex) external view returns (uint[] memory) { return groupsForMonitors[monitorIndex]; } function getNumberOfNodesInGroup(bytes32 monitorIndex) external view returns (uint) { return groupsForMonitors[monitorIndex].length; } function initialize(address newContractsAddress) public override initializer { Permissions.initialize(newContractsAddress); } /** * Add checked node or update existing one if it is already exits */ function addCheckedNode(bytes32 monitorIndex, CheckedNode memory checkedNode) public allow("SkaleManager") { for (uint i = 0; i < checkedNodes[monitorIndex].length; ++i) { if (checkedNodes[monitorIndex][i].nodeIndex == checkedNode.nodeIndex) { checkedNodes[monitorIndex][i] = checkedNode; return; } } checkedNodes[monitorIndex].push(checkedNode); } function getLastReceivedVerdictBlock(uint nodeIndex) public view returns (uint) { return lastVerdictBlocks[keccak256(abi.encodePacked(nodeIndex))]; } function getLengthOfMetrics(bytes32 monitorIndex) public view returns (uint) { return verdicts[monitorIndex].length; } function _generateGroup(bytes32 monitorIndex, uint nodeIndex, uint numberOfNodes) private { Nodes nodes = Nodes(contractManager.getContract("Nodes")); uint[] memory activeNodes = nodes.getActiveNodeIds(); uint numberOfNodesInGroup; uint availableAmount = activeNodes.length.sub((nodes.isNodeActive(nodeIndex)) ? 1 : 0); if (numberOfNodes > availableAmount) { numberOfNodesInGroup = availableAmount; } else { numberOfNodesInGroup = numberOfNodes; } uint ignoringTail = 0; uint random = uint(keccak256(abi.encodePacked(uint(blockhash(block.number.sub(1))), monitorIndex))); for (uint i = 0; i < numberOfNodesInGroup; ++i) { uint index = random % (activeNodes.length.sub(ignoringTail)); if (activeNodes[index] == nodeIndex) { _swap(activeNodes, index, activeNodes.length.sub(ignoringTail).sub(1)); ++ignoringTail; index = random % (activeNodes.length.sub(ignoringTail)); } groupsForMonitors[monitorIndex].push(activeNodes[index]); _swap(activeNodes, index, activeNodes.length.sub(ignoringTail).sub(1)); ++ignoringTail; } } function _median(uint[] memory values) private pure returns (uint) { if (values.length < 1) { revert("Can't calculate _median of empty array"); } _quickSort(values, 0, values.length.sub(1)); return values[values.length.div(2)]; } function _swap(uint[] memory array, uint index1, uint index2) private pure { uint buffer = array[index1]; array[index1] = array[index2]; array[index2] = buffer; } function _find(bytes32 monitorIndex, uint nodeIndex) private view returns (uint index, uint time) { index = checkedNodes[monitorIndex].length; time = 0; for (uint i = 0; i < checkedNodes[monitorIndex].length; i++) { uint checkedNodeNodeIndex; uint checkedNodeTime; checkedNodeNodeIndex = checkedNodes[monitorIndex][i].nodeIndex; checkedNodeTime = checkedNodes[monitorIndex][i].time; if (checkedNodeNodeIndex == nodeIndex && (time == 0 || checkedNodeTime < time)) { index = i; time = checkedNodeTime; } } } function _quickSort(uint[] memory array, uint left, uint right) private pure { uint leftIndex = left; uint rightIndex = right; uint middle = array[right.add(left).div(2)]; while (leftIndex <= rightIndex) { while (array[leftIndex] < middle) { leftIndex++; } while (middle < array[rightIndex]) { rightIndex--; } if (leftIndex <= rightIndex) { (array[leftIndex], array[rightIndex]) = (array[rightIndex], array[leftIndex]); leftIndex++; rightIndex = (rightIndex > 0 ? rightIndex.sub(1) : 0); } } if (left < rightIndex) _quickSort(array, left, rightIndex); if (leftIndex < right) _quickSort(array, leftIndex, right); } function _getCheckedNodeData(uint nodeIndex) private view returns (CheckedNode memory checkedNode) { ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); Nodes nodes = Nodes(contractManager.getContract("Nodes")); checkedNode.nodeIndex = nodeIndex; checkedNode.time = nodes.getNodeNextRewardDate(nodeIndex).sub(constantsHolder.deltaPeriod()); } function _emitVerdictsEvent( uint fromMonitorIndex, Verdict memory verdict, bool receiveVerdict ) private { uint previousBlockEvent = getLastReceivedVerdictBlock(verdict.toNodeIndex); lastVerdictBlocks[keccak256(abi.encodePacked(verdict.toNodeIndex))] = block.number; emit VerdictWasSent( fromMonitorIndex, verdict.toNodeIndex, verdict.downtime, verdict.latency, receiveVerdict, previousBlockEvent, block.timestamp, gasleft() ); } } contract NodeRotation is Permissions { using StringUtils for string; using StringUtils for uint; /** * nodeIndex - index of Node which is in process of rotation(left from schain) * newNodeIndex - index of Node which is rotated(added to schain) * freezeUntil - time till which Node should be turned on * rotationCounter - how many rotations were on this schain */ struct Rotation { uint nodeIndex; uint newNodeIndex; uint freezeUntil; uint rotationCounter; } struct LeavingHistory { bytes32 schainIndex; uint finishedRotation; } mapping (bytes32 => Rotation) public rotations; mapping (uint => LeavingHistory[]) public leavingHistory; mapping (bytes32 => bool) public waitForNewNode; function exitFromSchain(uint nodeIndex) external allow("SkaleManager") returns (bool) { SchainsInternal schainsInternal = SchainsInternal(contractManager.getContract("SchainsInternal")); bytes32 schainId = schainsInternal.getActiveSchain(nodeIndex); require(_checkRotation(schainId), "No any free Nodes for rotating"); rotateNode(nodeIndex, schainId, true); return schainsInternal.getActiveSchain(nodeIndex) == bytes32(0) ? true : false; } function freezeSchains(uint nodeIndex) external allow("SkaleManager") { SchainsInternal schainsInternal = SchainsInternal(contractManager.getContract("SchainsInternal")); bytes32[] memory schains = schainsInternal.getActiveSchains(nodeIndex); for (uint i = 0; i < schains.length; i++) { Rotation memory rotation = rotations[schains[i]]; if (rotation.nodeIndex == nodeIndex && now < rotation.freezeUntil) { continue; } string memory schainName = schainsInternal.getSchainName(schains[i]); string memory revertMessage = "Node cannot rotate on Schain "; revertMessage = revertMessage.strConcat(schainName); revertMessage = revertMessage.strConcat(", occupied by Node "); revertMessage = revertMessage.strConcat(rotation.nodeIndex.uint2str()); string memory dkgRevert = "DKG proccess did not finish on schain "; ISkaleDKG skaleDKG = ISkaleDKG(contractManager.getContract("SkaleDKG")); require( skaleDKG.isLastDKGSuccesful(keccak256(abi.encodePacked(schainName))), dkgRevert.strConcat(schainName)); require(rotation.freezeUntil < now, revertMessage); _startRotation(schains[i], nodeIndex); } } function removeRotation(bytes32 schainIndex) external allow("Schains") { delete rotations[schainIndex]; } function skipRotationDelay(bytes32 schainIndex) external onlyOwner { rotations[schainIndex].freezeUntil = now; } function getRotation(bytes32 schainIndex) external view returns (Rotation memory) { return rotations[schainIndex]; } function getLeavingHistory(uint nodeIndex) external view returns (LeavingHistory[] memory) { return leavingHistory[nodeIndex]; } function isRotationInProgress(bytes32 schainIndex) external view returns (bool) { return rotations[schainIndex].freezeUntil >= now && !waitForNewNode[schainIndex]; } function initialize(address newContractsAddress) public override initializer { Permissions.initialize(newContractsAddress); } function rotateNode( uint nodeIndex, bytes32 schainId, bool shouldDelay ) public allowTwo("SkaleDKG", "SkaleManager") returns (uint newNode) { SchainsInternal schainsInternal = SchainsInternal(contractManager.getContract("SchainsInternal")); Schains schains = Schains(contractManager.getContract("Schains")); schainsInternal.removeNodeFromSchain(nodeIndex, schainId); newNode = selectNodeToGroup(schainId); uint8 space = schainsInternal.getSchainsPartOfNode(schainId); schains.addSpace(nodeIndex, space); _finishRotation(schainId, nodeIndex, newNode, shouldDelay); } /** * @dev selectNodeToGroup - pseudo-randomly select new Node for Schain * @param schainId - hash of name of Schain * @return nodeIndex - global index of Node */ function selectNodeToGroup(bytes32 schainId) public allowThree("SkaleManager", "Schains", "SkaleDKG") returns (uint) { SchainsInternal schainsInternal = SchainsInternal(contractManager.getContract("SchainsInternal")); Nodes nodes = Nodes(contractManager.getContract("Nodes")); require(schainsInternal.isSchainActive(schainId), "Group is not active"); uint8 space = schainsInternal.getSchainsPartOfNode(schainId); uint[] memory possibleNodes = schainsInternal.isEnoughNodes(schainId); require(possibleNodes.length > 0, "No any free Nodes for rotation"); uint nodeIndex; uint random = uint(keccak256(abi.encodePacked(uint(blockhash(block.number - 1)), schainId))); do { uint index = random % possibleNodes.length; nodeIndex = possibleNodes[index]; random = uint(keccak256(abi.encodePacked(random, nodeIndex))); } while (schainsInternal.checkException(schainId, nodeIndex)); require(nodes.removeSpaceFromNode(nodeIndex, space), "Could not remove space from nodeIndex"); schainsInternal.addSchainForNode(nodeIndex, schainId); schainsInternal.setException(schainId, nodeIndex); schainsInternal.setNodeInGroup(schainId, nodeIndex); return nodeIndex; } function _startRotation(bytes32 schainIndex, uint nodeIndex) private { ConstantsHolder constants = ConstantsHolder(contractManager.getContract("ConstantsHolder")); rotations[schainIndex].nodeIndex = nodeIndex; rotations[schainIndex].newNodeIndex = nodeIndex; rotations[schainIndex].freezeUntil = now.add(constants.rotationDelay()); waitForNewNode[schainIndex] = true; } function _finishRotation( bytes32 schainIndex, uint nodeIndex, uint newNodeIndex, bool shouldDelay) private { ConstantsHolder constants = ConstantsHolder(contractManager.getContract("ConstantsHolder")); leavingHistory[nodeIndex].push( LeavingHistory(schainIndex, shouldDelay ? now.add(constants.rotationDelay()) : now) ); rotations[schainIndex].newNodeIndex = newNodeIndex; rotations[schainIndex].rotationCounter++; delete waitForNewNode[schainIndex]; ISkaleDKG(contractManager.getContract("SkaleDKG")).openChannel(schainIndex); } function _checkRotation(bytes32 schainId ) private view returns (bool) { SchainsInternal schainsInternal = SchainsInternal(contractManager.getContract("SchainsInternal")); require(schainsInternal.isSchainExist(schainId), "Schain does not exist for rotation"); return schainsInternal.isAnyFreeNode(schainId); } } contract Nodes is Permissions { using SafeCast for uint; // All Nodes states enum NodeStatus {Active, Leaving, Left, In_Maintenance} struct Node { string name; bytes4 ip; bytes4 publicIP; uint16 port; bytes32[2] publicKey; uint startBlock; uint lastRewardDate; uint finishTime; NodeStatus status; uint validatorId; } // struct to note which Nodes and which number of Nodes owned by user struct CreatedNodes { mapping (uint => bool) isNodeExist; uint numberOfNodes; } struct SpaceManaging { uint8 freeSpace; uint indexInSpaceMap; } // TODO: move outside the contract struct NodeCreationParams { string name; bytes4 ip; bytes4 publicIp; uint16 port; bytes32[2] publicKey; uint16 nonce; } // array which contain all Nodes Node[] public nodes; SpaceManaging[] public spaceOfNodes; // mapping for checking which Nodes and which number of Nodes owned by user mapping (address => CreatedNodes) public nodeIndexes; // mapping for checking is IP address busy mapping (bytes4 => bool) public nodesIPCheck; // mapping for checking is Name busy mapping (bytes32 => bool) public nodesNameCheck; // mapping for indication from Name to Index mapping (bytes32 => uint) public nodesNameToIndex; // mapping for indication from space to Nodes mapping (uint8 => uint[]) public spaceToNodes; mapping (uint => uint[]) public validatorToNodeIndexes; uint public numberOfActiveNodes; uint public numberOfLeavingNodes; uint public numberOfLeftNodes; // informs that Node is created event NodeCreated( uint nodeIndex, address owner, string name, bytes4 ip, bytes4 publicIP, uint16 port, uint16 nonce, uint time, uint gasSpend ); // informs that node is fully finished quitting from the system event ExitCompleted( uint nodeIndex, uint time, uint gasSpend ); // informs that owner starts the procedure of quitting the Node from the system event ExitInited( uint nodeIndex, uint startLeavingPeriod, uint time, uint gasSpend ); modifier checkNodeExists(uint nodeIndex) { require(nodeIndex < nodes.length, "Node with such index does not exist"); _; } /** * @dev removeSpaceFromFractionalNode - occupies space from Fractional Node * function could be run only by Schains * @param nodeIndex - index of Node at array of Fractional Nodes * @param space - space which should be occupied */ function removeSpaceFromNode(uint nodeIndex, uint8 space) external checkNodeExists(nodeIndex) allowTwo("NodeRotation", "SchainsInternal") returns (bool) { if (spaceOfNodes[nodeIndex].freeSpace < space) { return false; } if (space > 0) { _moveNodeToNewSpaceMap( nodeIndex, uint(spaceOfNodes[nodeIndex].freeSpace).sub(space).toUint8() ); } return true; } /** * @dev adSpaceToFractionalNode - returns space to Fractional Node * function could be run only be Schains * @param nodeIndex - index of Node at array of Fractional Nodes * @param space - space which should be returned */ function addSpaceToNode(uint nodeIndex, uint8 space) external checkNodeExists(nodeIndex) allow("Schains") { if (space > 0) { _moveNodeToNewSpaceMap( nodeIndex, uint(spaceOfNodes[nodeIndex].freeSpace).add(space).toUint8() ); } } /** * @dev changeNodeLastRewardDate - changes Node's last reward date * function could be run only by SkaleManager * @param nodeIndex - index of Node */ function changeNodeLastRewardDate(uint nodeIndex) external checkNodeExists(nodeIndex) allow("SkaleManager") { nodes[nodeIndex].lastRewardDate = block.timestamp; } function changeNodeFinishTime(uint nodeIndex, uint time) external checkNodeExists(nodeIndex) allow("SkaleManager") { nodes[nodeIndex].finishTime = time; } /** * @dev createNode - creates new Node and add it to the Nodes contract * function could be only run by SkaleManager * @param from - owner of Node */ // * @return nodeIndex - index of Node function createNode(address from, NodeCreationParams calldata params) external allow("SkaleManager") // returns (uint nodeIndex) { // checks that Node has correct data require(params.ip != 0x0 && !nodesIPCheck[params.ip], "IP address is zero or is not available"); require(!nodesNameCheck[keccak256(abi.encodePacked(params.name))], "Name has already registered"); require(params.port > 0, "Port is zero"); uint validatorId = ValidatorService( contractManager.getContract("ValidatorService")).getValidatorIdByNodeAddress(from); // adds Node to Nodes contract uint nodeIndex = _addNode( from, params.name, params.ip, params.publicIp, params.port, params.publicKey, validatorId); emit NodeCreated( nodeIndex, from, params.name, params.ip, params.publicIp, params.port, params.nonce, block.timestamp, gasleft()); } /** * @dev initExit - initiate a procedure of quitting the system * function could be only run by SkaleManager * @param nodeIndex - index of Node * @return true - if everything OK */ function initExit(uint nodeIndex) external checkNodeExists(nodeIndex) allow("SkaleManager") returns (bool) { _setNodeLeaving(nodeIndex); emit ExitInited( nodeIndex, block.timestamp, block.timestamp, gasleft()); return true; } /** * @dev completeExit - finish a procedure of quitting the system * function could be run only by SkaleManager * @param nodeIndex - index of Node * @return amount of SKL which be returned */ function completeExit(uint nodeIndex) external checkNodeExists(nodeIndex) allow("SkaleManager") returns (bool) { require(isNodeLeaving(nodeIndex), "Node is not Leaving"); _setNodeLeft(nodeIndex); _deleteNode(nodeIndex); emit ExitCompleted( nodeIndex, block.timestamp, gasleft()); return true; } function deleteNodeForValidator(uint validatorId, uint nodeIndex) external checkNodeExists(nodeIndex) allow("SkaleManager") { ValidatorService validatorService = ValidatorService(contractManager.getContract("ValidatorService")); require(validatorService.validatorExists(validatorId), "Validator with such ID does not exist"); uint[] memory validatorNodes = validatorToNodeIndexes[validatorId]; uint position = _findNode(validatorNodes, nodeIndex); if (position < validatorNodes.length) { validatorToNodeIndexes[validatorId][position] = validatorToNodeIndexes[validatorId][validatorNodes.length.sub(1)]; } validatorToNodeIndexes[validatorId].pop(); } function checkPossibilityCreatingNode(address nodeAddress) external allow("SkaleManager") { ValidatorService validatorService = ValidatorService(contractManager.getContract("ValidatorService")); DelegationController delegationController = DelegationController( contractManager.getContract("DelegationController") ); uint validatorId = validatorService.getValidatorIdByNodeAddress(nodeAddress); require(validatorService.isAuthorizedValidator(validatorId), "Validator is not authorized to create a node"); uint[] memory validatorNodes = validatorToNodeIndexes[validatorId]; uint delegationsTotal = delegationController.getAndUpdateDelegatedToValidatorNow(validatorId); uint msr = ConstantsHolder(contractManager.getContract("ConstantsHolder")).msr(); require( validatorNodes.length.add(1).mul(msr) <= delegationsTotal, "Validator must meet the Minimum Staking Requirement"); } function checkPossibilityToMaintainNode( uint validatorId, uint nodeIndex ) external checkNodeExists(nodeIndex) allow("Bounty") returns (bool) { DelegationController delegationController = DelegationController( contractManager.getContract("DelegationController") ); ValidatorService validatorService = ValidatorService(contractManager.getContract("ValidatorService")); require(validatorService.validatorExists(validatorId), "Validator with such ID does not exist"); uint[] memory validatorNodes = validatorToNodeIndexes[validatorId]; uint position = _findNode(validatorNodes, nodeIndex); require(position < validatorNodes.length, "Node does not exist for this Validator"); uint delegationsTotal = delegationController.getAndUpdateDelegatedToValidatorNow(validatorId); uint msr = ConstantsHolder(contractManager.getContract("ConstantsHolder")).msr(); return position.add(1).mul(msr) <= delegationsTotal; } function setNodeInMaintenance(uint nodeIndex) external { require(nodes[nodeIndex].status == NodeStatus.Active, "Node is not Active"); ValidatorService validatorService = ValidatorService(contractManager.getContract("ValidatorService")); uint validatorId = getValidatorId(nodeIndex); bool permitted = (_isOwner() || isNodeExist(msg.sender, nodeIndex)); if (!permitted) { permitted = validatorService.getValidatorId(msg.sender) == validatorId; } require(permitted, "Sender is not permitted to call this function"); nodes[nodeIndex].status = NodeStatus.In_Maintenance; } function removeNodeFromInMaintenance(uint nodeIndex) external { require(nodes[nodeIndex].status == NodeStatus.In_Maintenance, "Node is not In Maintence"); ValidatorService validatorService = ValidatorService(contractManager.getContract("ValidatorService")); uint validatorId = getValidatorId(nodeIndex); bool permitted = (_isOwner() || isNodeExist(msg.sender, nodeIndex)); if (!permitted) { permitted = validatorService.getValidatorId(msg.sender) == validatorId; } require(permitted, "Sender is not permitted to call this function"); nodes[nodeIndex].status = NodeStatus.Active; } function getNodesWithFreeSpace(uint8 freeSpace) external view returns (uint[] memory) { ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); uint[] memory nodesWithFreeSpace = new uint[](countNodesWithFreeSpace(freeSpace)); uint cursor = 0; uint totalSpace = constantsHolder.TOTAL_SPACE_ON_NODE(); for (uint8 i = freeSpace; i <= totalSpace; ++i) { for (uint j = 0; j < spaceToNodes[i].length; j++) { nodesWithFreeSpace[cursor] = spaceToNodes[i][j]; ++cursor; } } return nodesWithFreeSpace; } /** * @dev isTimeForReward - checks if time for reward has come * @param nodeIndex - index of Node * @return if time for reward has come - true, else - false */ function isTimeForReward(uint nodeIndex) external view checkNodeExists(nodeIndex) returns (bool) { ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); return uint(nodes[nodeIndex].lastRewardDate).add(constantsHolder.rewardPeriod()) <= block.timestamp; } /** * @dev getNodeIP - get ip address of Node * @param nodeIndex - index of Node * @return ip address */ function getNodeIP(uint nodeIndex) external view checkNodeExists(nodeIndex) returns (bytes4) { require(nodeIndex < nodes.length, "Node does not exist"); return nodes[nodeIndex].ip; } /** * @dev getNodePort - get Node's port * @param nodeIndex - index of Node * @return port */ function getNodePort(uint nodeIndex) external view checkNodeExists(nodeIndex) returns (uint16) { return nodes[nodeIndex].port; } function getNodePublicKey(uint nodeIndex) external view checkNodeExists(nodeIndex) returns (bytes32[2] memory) { return nodes[nodeIndex].publicKey; } function getNodeFinishTime(uint nodeIndex) external view checkNodeExists(nodeIndex) returns (uint) { return nodes[nodeIndex].finishTime; } /** * @dev isNodeLeft - checks if Node status Left * @param nodeIndex - index of Node * @return if Node status Left - true, else - false */ function isNodeLeft(uint nodeIndex) external view checkNodeExists(nodeIndex) returns (bool) { return nodes[nodeIndex].status == NodeStatus.Left; } function isNodeInMaintenance(uint nodeIndex) external view checkNodeExists(nodeIndex) returns (bool) { return nodes[nodeIndex].status == NodeStatus.In_Maintenance; } /** * @dev getNodeLastRewardDate - get Node last reward date * @param nodeIndex - index of Node * @return Node last reward date */ function getNodeLastRewardDate(uint nodeIndex) external view checkNodeExists(nodeIndex) returns (uint) { return nodes[nodeIndex].lastRewardDate; } /** * @dev getNodeNextRewardDate - get Node next reward date * @param nodeIndex - index of Node * @return Node next reward date */ function getNodeNextRewardDate(uint nodeIndex) external view checkNodeExists(nodeIndex) returns (uint) { ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); return nodes[nodeIndex].lastRewardDate.add(constantsHolder.rewardPeriod()); } /** * @dev getNumberOfNodes - get number of Nodes * @return number of Nodes */ function getNumberOfNodes() external view returns (uint) { return nodes.length; } /** * @dev getNumberOfFullNodes - get number Online Nodes * @return number of active nodes plus number of leaving nodes */ function getNumberOnlineNodes() external view returns (uint) { return numberOfActiveNodes.add(numberOfLeavingNodes); } /** * @dev getActiveNodeIPs - get array of ips of Active Nodes * @return activeNodeIPs - array of ips of Active Nodes */ function getActiveNodeIPs() external view returns (bytes4[] memory activeNodeIPs) { activeNodeIPs = new bytes4[](numberOfActiveNodes); uint indexOfActiveNodeIPs = 0; for (uint indexOfNodes = 0; indexOfNodes < nodes.length; indexOfNodes++) { if (isNodeActive(indexOfNodes)) { activeNodeIPs[indexOfActiveNodeIPs] = nodes[indexOfNodes].ip; indexOfActiveNodeIPs++; } } } /** * @dev getActiveNodesByAddress - get array of indexes of Active Nodes, which were * created by msg.sender * @return activeNodesByAddress Array of indexes of Active Nodes, which were created by msg.sender */ function getActiveNodesByAddress() external view returns (uint[] memory activeNodesByAddress) { activeNodesByAddress = new uint[](nodeIndexes[msg.sender].numberOfNodes); uint indexOfActiveNodesByAddress = 0; for (uint indexOfNodes = 0; indexOfNodes < nodes.length; indexOfNodes++) { if (nodeIndexes[msg.sender].isNodeExist[indexOfNodes] && isNodeActive(indexOfNodes)) { activeNodesByAddress[indexOfActiveNodesByAddress] = indexOfNodes; indexOfActiveNodesByAddress++; } } } /** * @dev getActiveNodeIds - get array of indexes of Active Nodes * @return activeNodeIds - array of indexes of Active Nodes */ function getActiveNodeIds() external view returns (uint[] memory activeNodeIds) { activeNodeIds = new uint[](numberOfActiveNodes); uint indexOfActiveNodeIds = 0; for (uint indexOfNodes = 0; indexOfNodes < nodes.length; indexOfNodes++) { if (isNodeActive(indexOfNodes)) { activeNodeIds[indexOfActiveNodeIds] = indexOfNodes; indexOfActiveNodeIds++; } } } function getNodeStatus(uint nodeIndex) external view checkNodeExists(nodeIndex) returns (NodeStatus) { return nodes[nodeIndex].status; } function getValidatorNodeIndexes(uint validatorId) external view returns (uint[] memory) { ValidatorService validatorService = ValidatorService(contractManager.getContract("ValidatorService")); require(validatorService.validatorExists(validatorId), "Validator with such ID does not exist"); return validatorToNodeIndexes[validatorId]; } /** * @dev constructor in Permissions approach * @param contractsAddress needed in Permissions constructor */ function initialize(address contractsAddress) public override initializer { Permissions.initialize(contractsAddress); numberOfActiveNodes = 0; numberOfLeavingNodes = 0; numberOfLeftNodes = 0; } function getValidatorId(uint nodeIndex) public view checkNodeExists(nodeIndex) returns (uint) { return nodes[nodeIndex].validatorId; } /** * @dev isNodeExist - checks existence of Node at this address * @param from - account address * @param nodeIndex - index of Node * @return if exist - true, else - false */ function isNodeExist(address from, uint nodeIndex) public view checkNodeExists(nodeIndex) returns (bool) { return nodeIndexes[from].isNodeExist[nodeIndex]; } /** * @dev isNodeActive - checks if Node status Active * @param nodeIndex - index of Node * @return if Node status Active - true, else - false */ function isNodeActive(uint nodeIndex) public view checkNodeExists(nodeIndex) returns (bool) { return nodes[nodeIndex].status == NodeStatus.Active; } /** * @dev isNodeLeaving - checks if Node status Leaving * @param nodeIndex - index of Node * @return if Node status Leaving - true, else - false */ function isNodeLeaving(uint nodeIndex) public view checkNodeExists(nodeIndex) returns (bool) { return nodes[nodeIndex].status == NodeStatus.Leaving; } function countNodesWithFreeSpace(uint8 freeSpace) public view returns (uint count) { ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); count = 0; uint totalSpace = constantsHolder.TOTAL_SPACE_ON_NODE(); for (uint8 i = freeSpace; i <= totalSpace; ++i) { count = count.add(spaceToNodes[i].length); } } function _findNode(uint[] memory validatorNodeIndexes, uint nodeIndex) private pure returns (uint) { uint i; for (i = 0; i < validatorNodeIndexes.length; i++) { if (validatorNodeIndexes[i] == nodeIndex) { return i; } } return validatorNodeIndexes.length; } function _moveNodeToNewSpaceMap(uint nodeIndex, uint8 newSpace) private { uint8 previousSpace = spaceOfNodes[nodeIndex].freeSpace; uint indexInArray = spaceOfNodes[nodeIndex].indexInSpaceMap; if (indexInArray < spaceToNodes[previousSpace].length.sub(1)) { uint shiftedIndex = spaceToNodes[previousSpace][spaceToNodes[previousSpace].length.sub(1)]; spaceToNodes[previousSpace][indexInArray] = shiftedIndex; spaceOfNodes[shiftedIndex].indexInSpaceMap = indexInArray; spaceToNodes[previousSpace].pop(); } else { spaceToNodes[previousSpace].pop(); } spaceToNodes[newSpace].push(nodeIndex); spaceOfNodes[nodeIndex].freeSpace = newSpace; spaceOfNodes[nodeIndex].indexInSpaceMap = spaceToNodes[newSpace].length.sub(1); } /** * @dev _setNodeLeft - set Node Left * function could be run only by Nodes * @param nodeIndex - index of Node */ function _setNodeLeft(uint nodeIndex) private { nodesIPCheck[nodes[nodeIndex].ip] = false; nodesNameCheck[keccak256(abi.encodePacked(nodes[nodeIndex].name))] = false; delete nodesNameToIndex[keccak256(abi.encodePacked(nodes[nodeIndex].name))]; if (nodes[nodeIndex].status == NodeStatus.Active) { numberOfActiveNodes--; } else { numberOfLeavingNodes--; } nodes[nodeIndex].status = NodeStatus.Left; numberOfLeftNodes++; } /** * @dev _setNodeLeaving - set Node Leaving * function could be run only by Nodes * @param nodeIndex - index of Node */ function _setNodeLeaving(uint nodeIndex) private { nodes[nodeIndex].status = NodeStatus.Leaving; numberOfActiveNodes--; numberOfLeavingNodes++; } /** * @dev _addNode - adds Node to array * function could be run only by executor * @param from - owner of Node * @param name - Node name * @param ip - Node ip * @param publicIP - Node public ip * @param port - Node public port * @param publicKey - Ethereum public key * @return nodeIndex Index of Node */ function _addNode( address from, string memory name, bytes4 ip, bytes4 publicIP, uint16 port, bytes32[2] memory publicKey, uint validatorId ) private returns (uint nodeIndex) { ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); nodes.push(Node({ name: name, ip: ip, publicIP: publicIP, port: port, //owner: from, publicKey: publicKey, startBlock: block.number, lastRewardDate: block.timestamp, finishTime: 0, status: NodeStatus.Active, validatorId: validatorId })); nodeIndex = nodes.length.sub(1); validatorToNodeIndexes[validatorId].push(nodeIndex); bytes32 nodeId = keccak256(abi.encodePacked(name)); nodesIPCheck[ip] = true; nodesNameCheck[nodeId] = true; nodesNameToIndex[nodeId] = nodeIndex; nodeIndexes[from].isNodeExist[nodeIndex] = true; nodeIndexes[from].numberOfNodes++; spaceOfNodes.push(SpaceManaging({ freeSpace: constantsHolder.TOTAL_SPACE_ON_NODE(), indexInSpaceMap: spaceToNodes[constantsHolder.TOTAL_SPACE_ON_NODE()].length })); spaceToNodes[constantsHolder.TOTAL_SPACE_ON_NODE()].push(nodeIndex); numberOfActiveNodes++; } function _deleteNode(uint nodeIndex) private { uint8 space = spaceOfNodes[nodeIndex].freeSpace; uint indexInArray = spaceOfNodes[nodeIndex].indexInSpaceMap; if (indexInArray < spaceToNodes[space].length.sub(1)) { uint shiftedIndex = spaceToNodes[space][spaceToNodes[space].length.sub(1)]; spaceToNodes[space][indexInArray] = shiftedIndex; spaceOfNodes[shiftedIndex].indexInSpaceMap = indexInArray; spaceToNodes[space].pop(); } else { spaceToNodes[space].pop(); } delete spaceOfNodes[nodeIndex].freeSpace; delete spaceOfNodes[nodeIndex].indexInSpaceMap; } }

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{"success": true, "error": null, "results": {"detectors": [{"check": "uninitialized-state", "impact": "High", "confidence": "High"}, {"check": "divide-before-multiply", "impact": "Medium", "confidence": "Medium"}, {"check": "reentrancy-no-eth", "impact": "Medium", "confidence": "Medium"}, {"check": "incorrect-equality", "impact": "Medium", "confidence": "High"}, {"check": "write-after-write", "impact": "Medium", "confidence": "High"}, {"check": "weak-prng", "impact": "High", "confidence": "Medium"}]}}

0x68261d79fcfbd316fd219242a66b8eae81124b9f

pragma solidity 0.4.21; contract EIP20Interface { /* This is a slight change to the ERC20 base standard. function totalSupply() constant returns (uint256 supply); is replaced with: uint256 public totalSupply; This automatically creates a getter function for the totalSupply. This is moved to the base contract since public getter functions are not currently recognised as an implementation of the matching abstract function by the compiler. */ /// total amount of tokens uint256 public totalSupply; /// @param _owner The address from which the balance will be retrieved /// @return The balance function balanceOf(address _owner) public view returns (uint256 balance); /// @notice send `_value` token to `_to` from `msg.sender` /// @param _to The address of the recipient /// @param _value The amount of token to be transferred /// @return Whether the transfer was successful or not function transfer(address _to, uint256 _value) public returns (bool success); /// @notice send `_value` token to `_to` from `_from` on the condition it is approved by `_from` /// @param _from The address of the sender /// @param _to The address of the recipient /// @param _value The amount of token to be transferred /// @return Whether the transfer was successful or not function transferFrom(address _from, address _to, uint256 _value) public returns (bool success); /// @notice `msg.sender` approves `_spender` to spend `_value` tokens /// @param _spender The address of the account able to transfer the tokens /// @param _value The amount of tokens to be approved for transfer /// @return Whether the approval was successful or not function approve(address _spender, uint256 _value) public returns (bool success); /// @param _owner The address of the account owning tokens /// @param _spender The address of the account able to transfer the tokens /// @return Amount of remaining tokens allowed to spent function allowance(address _owner, address _spender) public view returns (uint256 remaining); // solhint-disable-next-line no-simple-event-func-name event Transfer(address indexed _from, address indexed _to, uint256 _value); event Approval(address indexed _owner, address indexed _spender, uint256 _value); } contract YLOL is EIP20Interface { uint256 constant private MAX_UINT256 = 2**256 - 1; mapping (address => uint256) public balances; mapping (address => mapping (address => uint256)) public allowed; string public name; uint8 public decimals; string public symbol; function YLOL( uint256 _initialAmount, string _tokenName, uint8 _decimalUnits, string _tokenSymbol ) public { balances[msg.sender] = _initialAmount; totalSupply = _initialAmount; name = _tokenName; decimals = _decimalUnits; symbol = _tokenSymbol; } function transfer(address _to, uint256 _value) public returns (bool success) { require(balances[msg.sender] >= _value); balances[msg.sender] -= _value; balances[_to] += _value; emit Transfer(msg.sender, _to, _value); //solhint-disable-line indent, no-unused-vars return true; } function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) { uint256 allowance = allowed[_from][msg.sender]; require(balances[_from] >= _value && allowance >= _value); balances[_to] += _value; balances[_from] -= _value; if (allowance < MAX_UINT256) { allowed[_from][msg.sender] -= _value; } emit Transfer(_from, _to, _value); //solhint-disable-line indent, no-unused-vars return true; } function balanceOf(address _owner) public view returns (uint256 balance) { return balances[_owner]; } function approve(address _spender, uint256 _value) public returns (bool success) { allowed[msg.sender][_spender] = _value; emit Approval(msg.sender, _spender, _value); //solhint-disable-line indent, no-unused-vars return true; } function allowance(address _owner, address _spender) public view returns (uint256 remaining) { return allowed[_owner][_spender]; } }

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0x6847259b2B3A4c17e7c43C54409810aF48bA5210

pragma solidity 0.6.7; pragma experimental ABIEncoderV2; contract ControllerV4 { using SafeERC20 for IERC20; using Address for address; using SafeMath for uint256; address public constant burn = 0x000000000000000000000000000000000000dEaD; address public onesplit = 0xC586BeF4a0992C495Cf22e1aeEE4E446CECDee0E; address public governance; address public strategist; address public devfund; address public treasury; address public timelock; // Convenience fee 0.1% uint256 public convenienceFee = 100; uint256 public constant convenienceFeeMax = 100000; mapping(address => address) public jars; mapping(address => address) public strategies; mapping(address => mapping(address => address)) public converters; mapping(address => mapping(address => bool)) public approvedStrategies; mapping(address => bool) public approvedJarConverters; uint256 public split = 500; uint256 public constant max = 10000; constructor( address _governance, address _strategist, address _timelock, address _devfund, address _treasury ) public { governance = _governance; strategist = _strategist; timelock = _timelock; devfund = _devfund; treasury = _treasury; } function setDevFund(address _devfund) public { require(msg.sender == governance, "!governance"); devfund = _devfund; } function setTreasury(address _treasury) public { require(msg.sender == governance, "!governance"); treasury = _treasury; } function setStrategist(address _strategist) public { require(msg.sender == governance, "!governance"); strategist = _strategist; } function setSplit(uint256 _split) public { require(msg.sender == governance, "!governance"); split = _split; } function setOneSplit(address _onesplit) public { require(msg.sender == governance, "!governance"); onesplit = _onesplit; } function setGovernance(address _governance) public { require(msg.sender == governance, "!governance"); governance = _governance; } function setTimelock(address _timelock) public { require(msg.sender == timelock, "!timelock"); timelock = _timelock; } function setJar(address _token, address _jar) public { require( msg.sender == strategist || msg.sender == governance, "!strategist" ); require(jars[_token] == address(0), "jar"); jars[_token] = _jar; } function approveJarConverter(address _converter) public { require(msg.sender == governance, "!governance"); approvedJarConverters[_converter] = true; } function revokeJarConverter(address _converter) public { require(msg.sender == governance, "!governance"); approvedJarConverters[_converter] = false; } function approveStrategy(address _token, address _strategy) public { require(msg.sender == timelock, "!timelock"); approvedStrategies[_token][_strategy] = true; } function revokeStrategy(address _token, address _strategy) public { require(msg.sender == governance, "!governance"); approvedStrategies[_token][_strategy] = false; } function setConvenienceFee(uint256 _convenienceFee) external { require(msg.sender == timelock, "!timelock"); convenienceFee = _convenienceFee; } function setStrategy(address _token, address _strategy) public { require( msg.sender == strategist || msg.sender == governance, "!strategist" ); require(approvedStrategies[_token][_strategy] == true, "!approved"); address _current = strategies[_token]; if (_current != address(0)) { IStrategy(_current).withdrawAll(); } strategies[_token] = _strategy; } function earn(address _token, uint256 _amount) public { address _strategy = strategies[_token]; address _want = IStrategy(_strategy).want(); if (_want != _token) { address converter = converters[_token][_want]; IERC20(_token).safeTransfer(converter, _amount); _amount = Converter(converter).convert(_strategy); IERC20(_want).safeTransfer(_strategy, _amount); } else { IERC20(_token).safeTransfer(_strategy, _amount); } IStrategy(_strategy).deposit(); } function balanceOf(address _token) external view returns (uint256) { return IStrategy(strategies[_token]).balanceOf(); } function withdrawAll(address _token) public { require( msg.sender == strategist || msg.sender == governance, "!strategist" ); IStrategy(strategies[_token]).withdrawAll(); } function inCaseTokensGetStuck(address _token, uint256 _amount) public { require( msg.sender == strategist || msg.sender == governance, "!governance" ); IERC20(_token).safeTransfer(msg.sender, _amount); } function inCaseStrategyTokenGetStuck(address _strategy, address _token) public { require( msg.sender == strategist || msg.sender == governance, "!governance" ); IStrategy(_strategy).withdraw(_token); } function getExpectedReturn( address _strategy, address _token, uint256 parts ) public view returns (uint256 expected) { uint256 _balance = IERC20(_token).balanceOf(_strategy); address _want = IStrategy(_strategy).want(); (expected, ) = OneSplitAudit(onesplit).getExpectedReturn( _token, _want, _balance, parts, 0 ); } // Only allows to withdraw non-core strategy tokens ~ this is over and above normal yield function yearn( address _strategy, address _token, uint256 parts ) public { require( msg.sender == strategist || msg.sender == governance, "!governance" ); // This contract should never have value in it, but just incase since this is a public call uint256 _before = IERC20(_token).balanceOf(address(this)); IStrategy(_strategy).withdraw(_token); uint256 _after = IERC20(_token).balanceOf(address(this)); if (_after > _before) { uint256 _amount = _after.sub(_before); address _want = IStrategy(_strategy).want(); uint256[] memory _distribution; uint256 _expected; _before = IERC20(_want).balanceOf(address(this)); IERC20(_token).safeApprove(onesplit, 0); IERC20(_token).safeApprove(onesplit, _amount); (_expected, _distribution) = OneSplitAudit(onesplit) .getExpectedReturn(_token, _want, _amount, parts, 0); OneSplitAudit(onesplit).swap( _token, _want, _amount, _expected, _distribution, 0 ); _after = IERC20(_want).balanceOf(address(this)); if (_after > _before) { _amount = _after.sub(_before); uint256 _treasury = _amount.mul(split).div(max); earn(_want, _amount.sub(_treasury)); IERC20(_want).safeTransfer(treasury, _treasury); } } } function withdraw(address _token, uint256 _amount) public { require(msg.sender == jars[_token], "!jar"); IStrategy(strategies[_token]).withdraw(_amount); } // Function to swap between jars function swapExactJarForJar( address _fromJar, // From which Jar address _toJar, // To which Jar uint256 _fromJarAmount, // How much jar tokens to swap uint256 _toJarMinAmount, // How much jar tokens you'd like at a minimum address payable[] calldata _targets, bytes[] calldata _data ) external returns (uint256) { require(_targets.length == _data.length, "!length"); // Only return last response for (uint256 i = 0; i < _targets.length; i++) { require(_targets[i] != address(0), "!converter"); require(approvedJarConverters[_targets[i]], "!converter"); } address _fromJarToken = IJar(_fromJar).token(); address _toJarToken = IJar(_toJar).token(); // Get pTokens from msg.sender IERC20(_fromJar).safeTransferFrom( msg.sender, address(this), _fromJarAmount ); // Calculate how much underlying // is the amount of pTokens worth uint256 _fromJarUnderlyingAmount = _fromJarAmount .mul(IJar(_fromJar).getRatio()) .div(10**uint256(IJar(_fromJar).decimals())); // Call 'withdrawForSwap' on Jar's current strategy if Jar // doesn't have enough initial capital. // This has moves the funds from the strategy to the Jar's // 'earnable' amount. Enabling 'free' withdrawals uint256 _fromJarAvailUnderlying = IERC20(_fromJarToken).balanceOf( _fromJar ); if (_fromJarAvailUnderlying < _fromJarUnderlyingAmount) { IStrategy(strategies[_fromJarToken]).withdrawForSwap( _fromJarUnderlyingAmount.sub(_fromJarAvailUnderlying) ); } // Withdraw from Jar // Note: this is free since its still within the "earnable" amount // as we transferred the access IERC20(_fromJar).safeApprove(_fromJar, 0); IERC20(_fromJar).safeApprove(_fromJar, _fromJarAmount); IJar(_fromJar).withdraw(_fromJarAmount); // Calculate fee uint256 _fromUnderlyingBalance = IERC20(_fromJarToken).balanceOf( address(this) ); uint256 _convenienceFee = _fromUnderlyingBalance.mul(convenienceFee).div( convenienceFeeMax ); if (_convenienceFee > 1) { IERC20(_fromJarToken).safeTransfer(devfund, _convenienceFee.div(2)); IERC20(_fromJarToken).safeTransfer(treasury, _convenienceFee.div(2)); } // Executes sequence of logic for (uint256 i = 0; i < _targets.length; i++) { _execute(_targets[i], _data[i]); } // Deposit into new Jar uint256 _toBal = IERC20(_toJarToken).balanceOf(address(this)); IERC20(_toJarToken).safeApprove(_toJar, 0); IERC20(_toJarToken).safeApprove(_toJar, _toBal); IJar(_toJar).deposit(_toBal); // Send Jar Tokens to user uint256 _toJarBal = IJar(_toJar).balanceOf(address(this)); if (_toJarBal < _toJarMinAmount) { revert("!min-jar-amount"); } IJar(_toJar).transfer(msg.sender, _toJarBal); return _toJarBal; } function _execute(address _target, bytes memory _data) internal returns (bytes memory response) { require(_target != address(0), "!target"); // call contract in current context assembly { let succeeded := delegatecall( sub(gas(), 5000), _target, add(_data, 0x20), mload(_data), 0, 0 ) let size := returndatasize() response := mload(0x40) mstore( 0x40, add(response, and(add(add(size, 0x20), 0x1f), not(0x1f))) ) mstore(response, size) returndatacopy(add(response, 0x20), 0, size) switch iszero(succeeded) case 1 { // throw if delegatecall failed revert(add(response, 0x20), size) } } } } contract Timelock { using SafeMath for uint; event NewAdmin(address indexed newAdmin); event NewPendingAdmin(address indexed newPendingAdmin); event NewDelay(uint indexed newDelay); event CancelTransaction(bytes32 indexed txHash, address indexed target, uint value, string signature, bytes data, uint eta); event ExecuteTransaction(bytes32 indexed txHash, address indexed target, uint value, string signature, bytes data, uint eta); event QueueTransaction(bytes32 indexed txHash, address indexed target, uint value, string signature, bytes data, uint eta); uint public constant GRACE_PERIOD = 14 days; uint public constant MINIMUM_DELAY = 2 days; uint public constant MAXIMUM_DELAY = 30 days; address public admin; address public pendingAdmin; uint public delay; bool public admin_initialized; mapping (bytes32 => bool) public queuedTransactions; constructor(address admin_, uint delay_) public { require(delay_ >= MINIMUM_DELAY, "Timelock::constructor: Delay must exceed minimum delay."); require(delay_ <= MAXIMUM_DELAY, "Timelock::constructor: Delay must not exceed maximum delay."); admin = admin_; delay = delay_; admin_initialized = false; } // XXX: function() external payable { } receive() external payable { } function setDelay(uint delay_) public { require(msg.sender == address(this), "Timelock::setDelay: Call must come from Timelock."); require(delay_ >= MINIMUM_DELAY, "Timelock::setDelay: Delay must exceed minimum delay."); require(delay_ <= MAXIMUM_DELAY, "Timelock::setDelay: Delay must not exceed maximum delay."); delay = delay_; emit NewDelay(delay); } function acceptAdmin() public { require(msg.sender == pendingAdmin, "Timelock::acceptAdmin: Call must come from pendingAdmin."); admin = msg.sender; pendingAdmin = address(0); emit NewAdmin(admin); } function setPendingAdmin(address pendingAdmin_) public { // allows one time setting of admin for deployment purposes if (admin_initialized) { require(msg.sender == address(this), "Timelock::setPendingAdmin: Call must come from Timelock."); } else { require(msg.sender == admin, "Timelock::setPendingAdmin: First call must come from admin."); admin_initialized = true; } pendingAdmin = pendingAdmin_; emit NewPendingAdmin(pendingAdmin); } function queueTransaction(address target, uint value, string memory signature, bytes memory data, uint eta) public returns (bytes32) { require(msg.sender == admin, "Timelock::queueTransaction: Call must come from admin."); require(eta >= getBlockTimestamp().add(delay), "Timelock::queueTransaction: Estimated execution block must satisfy delay."); bytes32 txHash = keccak256(abi.encode(target, value, signature, data, eta)); queuedTransactions[txHash] = true; emit QueueTransaction(txHash, target, value, signature, data, eta); return txHash; } function cancelTransaction(address target, uint value, string memory signature, bytes memory data, uint eta) public { require(msg.sender == admin, "Timelock::cancelTransaction: Call must come from admin."); bytes32 txHash = keccak256(abi.encode(target, value, signature, data, eta)); queuedTransactions[txHash] = false; emit CancelTransaction(txHash, target, value, signature, data, eta); } function executeTransaction(address target, uint value, string memory signature, bytes memory data, uint eta) public payable returns (bytes memory) { require(msg.sender == admin, "Timelock::executeTransaction: Call must come from admin."); bytes32 txHash = keccak256(abi.encode(target, value, signature, data, eta)); require(queuedTransactions[txHash], "Timelock::executeTransaction: Transaction hasn't been queued."); require(getBlockTimestamp() >= eta, "Timelock::executeTransaction: Transaction hasn't surpassed time lock."); require(getBlockTimestamp() <= eta.add(GRACE_PERIOD), "Timelock::executeTransaction: Transaction is stale."); queuedTransactions[txHash] = false; bytes memory callData; if (bytes(signature).length == 0) { callData = data; } else { callData = abi.encodePacked(bytes4(keccak256(bytes(signature))), data); } // solium-disable-next-line security/no-call-value (bool success, bytes memory returnData) = target.call.value(value)(callData); require(success, "Timelock::executeTransaction: Transaction execution reverted."); emit ExecuteTransaction(txHash, target, value, signature, data, eta); return returnData; } function getBlockTimestamp() internal view returns (uint) { // solium-disable-next-line security/no-block-members return block.timestamp; } } interface ICToken { function totalSupply() external view returns (uint256); function totalBorrows() external returns (uint256); function borrowIndex() external returns (uint256); function repayBorrow(uint256 repayAmount) external returns (uint256); function redeemUnderlying(uint256 redeemAmount) external returns (uint256); function borrow(uint256 borrowAmount) external returns (uint256); function mint(uint256 mintAmount) external returns (uint256); function transfer(address dst, uint256 amount) external returns (bool); function transferFrom( address src, address dst, uint256 amount ) external returns (bool); function approve(address spender, uint256 amount) external returns (bool); function allowance(address owner, address spender) external view returns (uint256); function balanceOf(address owner) external view returns (uint256); function balanceOfUnderlying(address owner) external returns (uint256); function getAccountSnapshot(address account) external view returns ( uint256, uint256, uint256, uint256 ); function borrowRatePerBlock() external view returns (uint256); function supplyRatePerBlock() external view returns (uint256); function totalBorrowsCurrent() external returns (uint256); function borrowBalanceCurrent(address account) external returns (uint256); function borrowBalanceStored(address account) external view returns (uint256); function exchangeRateCurrent() external returns (uint256); function exchangeRateStored() external view returns (uint256); function getCash() external view returns (uint256); function accrueInterest() external returns (uint256); function seize( address liquidator, address borrower, uint256 seizeTokens ) external returns (uint256); } interface ICEther { function mint() external payable; /** * @notice Sender redeems cTokens in exchange for the underlying asset * @dev Accrues interest whether or not the operation succeeds, unless reverted * @param redeemTokens The number of cTokens to redeem into underlying * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function redeem(uint256 redeemTokens) external returns (uint256); /** * @notice Sender redeems cTokens in exchange for a specified amount of underlying asset * @dev Accrues interest whether or not the operation succeeds, unless reverted * @param redeemAmount The amount of underlying to redeem * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function redeemUnderlying(uint256 redeemAmount) external returns (uint256); /** * @notice Sender borrows assets from the protocol to their own address * @param borrowAmount The amount of the underlying asset to borrow * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function borrow(uint256 borrowAmount) external returns (uint256); /** * @notice Sender repays their own borrow * @dev Reverts upon any failure */ function repayBorrow() external payable; /** * @notice Sender repays a borrow belonging to borrower * @dev Reverts upon any failure * @param borrower the account with the debt being payed off */ function repayBorrowBehalf(address borrower) external payable; /** * @notice The sender liquidates the borrowers collateral. * The collateral seized is transferred to the liquidator. * @dev Reverts upon any failure * @param borrower The borrower of this cToken to be liquidated * @param cTokenCollateral The market in which to seize collateral from the borrower */ function liquidateBorrow(address borrower, address cTokenCollateral) external payable; } interface IComptroller { function compAccrued(address) external view returns (uint256); function compSupplierIndex(address, address) external view returns (uint256); function compBorrowerIndex(address, address) external view returns (uint256); function compSpeeds(address) external view returns (uint256); function compBorrowState(address) external view returns (uint224, uint32); function compSupplyState(address) external view returns (uint224, uint32); /*** Assets You Are In ***/ function enterMarkets(address[] calldata cTokens) external returns (uint256[] memory); function exitMarket(address cToken) external returns (uint256); /*** Policy Hooks ***/ function mintAllowed( address cToken, address minter, uint256 mintAmount ) external returns (uint256); function mintVerify( address cToken, address minter, uint256 mintAmount, uint256 mintTokens ) external; function redeemAllowed( address cToken, address redeemer, uint256 redeemTokens ) external returns (uint256); function redeemVerify( address cToken, address redeemer, uint256 redeemAmount, uint256 redeemTokens ) external; function borrowAllowed( address cToken, address borrower, uint256 borrowAmount ) external returns (uint256); function borrowVerify( address cToken, address borrower, uint256 borrowAmount ) external; function repayBorrowAllowed( address cToken, address payer, address borrower, uint256 repayAmount ) external returns (uint256); function repayBorrowVerify( address cToken, address payer, address borrower, uint256 repayAmount, uint256 borrowerIndex ) external; function liquidateBorrowAllowed( address cTokenBorrowed, address cTokenCollateral, address liquidator, address borrower, uint256 repayAmount ) external returns (uint256); function liquidateBorrowVerify( address cTokenBorrowed, address cTokenCollateral, address liquidator, address borrower, uint256 repayAmount, uint256 seizeTokens ) external; function seizeAllowed( address cTokenCollateral, address cTokenBorrowed, address liquidator, address borrower, uint256 seizeTokens ) external returns (uint256); function seizeVerify( address cTokenCollateral, address cTokenBorrowed, address liquidator, address borrower, uint256 seizeTokens ) external; function transferAllowed( address cToken, address src, address dst, uint256 transferTokens ) external returns (uint256); function transferVerify( address cToken, address src, address dst, uint256 transferTokens ) external; /*** Liquidity/Liquidation Calculations ***/ function liquidateCalculateSeizeTokens( address cTokenBorrowed, address cTokenCollateral, uint256 repayAmount ) external view returns (uint256, uint256); // Claim all the COMP accrued by holder in all markets function claimComp(address holder) external; // Claim all the COMP accrued by holder in specific markets function claimComp(address holder, address[] calldata cTokens) external; // Claim all the COMP accrued by specific holders in specific markets for their supplies and/or borrows function claimComp( address[] calldata holders, address[] calldata cTokens, bool borrowers, bool suppliers ) external; function markets(address cTokenAddress) external view returns (bool, uint256); } interface ICompoundLens { function getCompBalanceMetadataExt( address comp, address comptroller, address account ) external returns ( uint256 balance, uint256 votes, address delegate, uint256 allocated ); } interface IController { function jars(address) external view returns (address); function rewards() external view returns (address); function devfund() external view returns (address); function treasury() external view returns (address); function balanceOf(address) external view returns (uint256); function withdraw(address, uint256) external; function earn(address, uint256) external; } interface Converter { function convert(address) external returns (uint256); } interface ICurveFi_2 { function get_virtual_price() external view returns (uint256); function add_liquidity(uint256[2] calldata amounts, uint256 min_mint_amount) external; function remove_liquidity_imbalance( uint256[2] calldata amounts, uint256 max_burn_amount ) external; function remove_liquidity(uint256 _amount, uint256[2] calldata amounts) external; function exchange( int128 from, int128 to, uint256 _from_amount, uint256 _min_to_amount ) external; function balances(int128) external view returns (uint256); } interface ICurveFi_3 { function get_virtual_price() external view returns (uint256); function add_liquidity(uint256[3] calldata amounts, uint256 min_mint_amount) external; function remove_liquidity_imbalance( uint256[3] calldata amounts, uint256 max_burn_amount ) external; function remove_liquidity(uint256 _amount, uint256[3] calldata amounts) external; function exchange( int128 from, int128 to, uint256 _from_amount, uint256 _min_to_amount ) external; function balances(uint256) external view returns (uint256); } interface ICurveFi_4 { function get_virtual_price() external view returns (uint256); function add_liquidity(uint256[4] calldata amounts, uint256 min_mint_amount) external; function remove_liquidity_imbalance( uint256[4] calldata amounts, uint256 max_burn_amount ) external; function remove_liquidity(uint256 _amount, uint256[4] calldata amounts) external; function exchange( int128 from, int128 to, uint256 _from_amount, uint256 _min_to_amount ) external; function balances(int128) external view returns (uint256); } interface ICurveZap_4 { function add_liquidity( uint256[4] calldata uamounts, uint256 min_mint_amount ) external; function remove_liquidity(uint256 _amount, uint256[4] calldata min_uamounts) external; function remove_liquidity_imbalance( uint256[4] calldata uamounts, uint256 max_burn_amount ) external; function calc_withdraw_one_coin(uint256 _token_amount, int128 i) external returns (uint256); function remove_liquidity_one_coin( uint256 _token_amount, int128 i, uint256 min_uamount ) external; function remove_liquidity_one_coin( uint256 _token_amount, int128 i, uint256 min_uamount, bool donate_dust ) external; function withdraw_donated_dust() external; function coins(int128 arg0) external returns (address); function underlying_coins(int128 arg0) external returns (address); function curve() external returns (address); function token() external returns (address); } interface ICurveZap { function remove_liquidity_one_coin( uint256 _token_amount, int128 i, uint256 min_uamount ) external; } interface ICurveGauge { function deposit(uint256 _value) external; function deposit(uint256 _value, address addr) external; function balanceOf(address arg0) external view returns (uint256); function withdraw(uint256 _value) external; function withdraw(uint256 _value, bool claim_rewards) external; function claim_rewards() external; function claim_rewards(address addr) external; function claimable_tokens(address addr) external returns (uint256); function claimable_reward(address addr) external view returns (uint256); function integrate_fraction(address arg0) external view returns (uint256); } interface ICurveMintr { function mint(address) external; function minted(address arg0, address arg1) external view returns (uint256); } interface ICurveVotingEscrow { function locked(address arg0) external view returns (int128 amount, uint256 end); function locked__end(address _addr) external view returns (uint256); function create_lock(uint256, uint256) external; function increase_amount(uint256) external; function increase_unlock_time(uint256 _unlock_time) external; function withdraw() external; function smart_wallet_checker() external returns (address); } interface ICurveSmartContractChecker { function wallets(address) external returns (bool); function approveWallet(address _wallet) external; } interface IJarConverter { function convert( address _refundExcess, // address to send the excess amount when adding liquidity uint256 _amount, // UNI LP Amount bytes calldata _data ) external returns (uint256); } interface IMasterchef { function BONUS_MULTIPLIER() external view returns (uint256); function add( uint256 _allocPoint, address _lpToken, bool _withUpdate ) external; function bonusEndBlock() external view returns (uint256); function deposit(uint256 _pid, uint256 _amount) external; function dev(address _devaddr) external; function devFundDivRate() external view returns (uint256); function devaddr() external view returns (address); function emergencyWithdraw(uint256 _pid) external; function getMultiplier(uint256 _from, uint256 _to) external view returns (uint256); function massUpdatePools() external; function owner() external view returns (address); function pendingPickle(uint256 _pid, address _user) external view returns (uint256); function pickle() external view returns (address); function picklePerBlock() external view returns (uint256); function poolInfo(uint256) external view returns ( address lpToken, uint256 allocPoint, uint256 lastRewardBlock, uint256 accPicklePerShare ); function poolLength() external view returns (uint256); function renounceOwnership() external; function set( uint256 _pid, uint256 _allocPoint, bool _withUpdate ) external; function setBonusEndBlock(uint256 _bonusEndBlock) external; function setDevFundDivRate(uint256 _devFundDivRate) external; function setPicklePerBlock(uint256 _picklePerBlock) external; function startBlock() external view returns (uint256); function totalAllocPoint() external view returns (uint256); function transferOwnership(address newOwner) external; function updatePool(uint256 _pid) external; function userInfo(uint256, address) external view returns (uint256 amount, uint256 rewardDebt); function withdraw(uint256 _pid, uint256 _amount) external; } interface OneSplitAudit { function getExpectedReturn( address fromToken, address toToken, uint256 amount, uint256 parts, uint256 featureFlags ) external view returns (uint256 returnAmount, uint256[] memory distribution); function swap( address fromToken, address toToken, uint256 amount, uint256 minReturn, uint256[] calldata distribution, uint256 featureFlags ) external payable; } interface Proxy { function execute( address to, uint256 value, bytes calldata data ) external returns (bool, bytes memory); function increaseAmount(uint256) external; } interface IStakingRewards { function balanceOf(address account) external view returns (uint256); function earned(address account) external view returns (uint256); function exit() external; function getReward() external; function getRewardForDuration() external view returns (uint256); function lastTimeRewardApplicable() external view returns (uint256); function lastUpdateTime() external view returns (uint256); function notifyRewardAmount(uint256 reward) external; function periodFinish() external view returns (uint256); function rewardPerToken() external view returns (uint256); function rewardPerTokenStored() external view returns (uint256); function rewardRate() external view returns (uint256); function rewards(address) external view returns (uint256); function rewardsDistribution() external view returns (address); function rewardsDuration() external view returns (uint256); function rewardsToken() external view returns (address); function stake(uint256 amount) external; function stakeWithPermit( uint256 amount, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) external; function stakingToken() external view returns (address); function totalSupply() external view returns (uint256); function userRewardPerTokenPaid(address) external view returns (uint256); function withdraw(uint256 amount) external; } interface IStakingRewardsFactory { function deploy(address stakingToken, uint256 rewardAmount) external; function isOwner() external view returns (bool); function notifyRewardAmount(address stakingToken) external; function notifyRewardAmounts() external; function owner() external view returns (address); function renounceOwnership() external; function rewardsToken() external view returns (address); function stakingRewardsGenesis() external view returns (uint256); function stakingRewardsInfoByStakingToken(address) external view returns (address stakingRewards, uint256 rewardAmount); function stakingTokens(uint256) external view returns (address); function transferOwnership(address newOwner) external; } interface IStrategy { function rewards() external view returns (address); function gauge() external view returns (address); function want() external view returns (address); function timelock() external view returns (address); function deposit() external; function withdrawForSwap(uint256) external returns (uint256); function withdraw(address) external; function withdraw(uint256) external; function skim() external; function withdrawAll() external returns (uint256); function balanceOf() external view returns (uint256); function harvest() external; function setTimelock(address) external; function setController(address _controller) external; function execute(address _target, bytes calldata _data) external payable returns (bytes memory response); function execute(bytes calldata _data) external payable returns (bytes memory response); } interface UniswapRouterV2 { function swapExactTokensForTokens( uint256 amountIn, uint256 amountOutMin, address[] calldata path, address to, uint256 deadline ) external returns (uint256[] memory amounts); function addLiquidity( address tokenA, address tokenB, uint256 amountADesired, uint256 amountBDesired, uint256 amountAMin, uint256 amountBMin, address to, uint256 deadline ) external returns ( uint256 amountA, uint256 amountB, uint256 liquidity ); function addLiquidityETH( address token, uint256 amountTokenDesired, uint256 amountTokenMin, uint256 amountETHMin, address to, uint256 deadline ) external payable returns ( uint256 amountToken, uint256 amountETH, uint256 liquidity ); function removeLiquidity( address tokenA, address tokenB, uint256 liquidity, uint256 amountAMin, uint256 amountBMin, address to, uint256 deadline ) external returns (uint256 amountA, uint256 amountB); function getAmountsOut(uint256 amountIn, address[] calldata path) external view returns (uint256[] memory amounts); function getAmountsIn(uint256 amountOut, address[] calldata path) external view returns (uint256[] memory amounts); function swapETHForExactTokens( uint256 amountOut, address[] calldata path, address to, uint256 deadline ) external payable returns (uint256[] memory amounts); function swapExactETHForTokens( uint256 amountOutMin, address[] calldata path, address to, uint256 deadline ) external payable returns (uint256[] memory amounts); } interface IUniswapV2Pair { event Approval( address indexed owner, address indexed spender, uint256 value ); event Transfer(address indexed from, address indexed to, uint256 value); function name() external pure returns (string memory); function symbol() external pure returns (string memory); function decimals() external pure returns (uint8); function totalSupply() external view returns (uint256); function balanceOf(address owner) external view returns (uint256); function allowance(address owner, address spender) external view returns (uint256); function approve(address spender, uint256 value) external returns (bool); function transfer(address to, uint256 value) external returns (bool); function transferFrom( address from, address to, uint256 value ) external returns (bool); function DOMAIN_SEPARATOR() external view returns (bytes32); function PERMIT_TYPEHASH() external pure returns (bytes32); function nonces(address owner) external view returns (uint256); function permit( address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) external; event Mint(address indexed sender, uint256 amount0, uint256 amount1); event Burn( address indexed sender, uint256 amount0, uint256 amount1, address indexed to ); event Swap( address indexed sender, uint256 amount0In, uint256 amount1In, uint256 amount0Out, uint256 amount1Out, address indexed to ); event Sync(uint112 reserve0, uint112 reserve1); function MINIMUM_LIQUIDITY() external pure returns (uint256); function factory() external view returns (address); function token0() external view returns (address); function token1() external view returns (address); function getReserves() external view returns ( uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast ); function price0CumulativeLast() external view returns (uint256); function price1CumulativeLast() external view returns (uint256); function kLast() external view returns (uint256); function mint(address to) external returns (uint256 liquidity); function burn(address to) external returns (uint256 amount0, uint256 amount1); function swap( uint256 amount0Out, uint256 amount1Out, address to, bytes calldata data ) external; function skim(address to) external; function sync() external; } interface IUniswapV2Factory { event PairCreated( address indexed token0, address indexed token1, address pair, uint256 ); function getPair(address tokenA, address tokenB) external view returns (address pair); function allPairs(uint256) external view returns (address pair); function allPairsLength() external view returns (uint256); function feeTo() external view returns (address); function feeToSetter() external view returns (address); function createPair(address tokenA, address tokenB) external returns (address pair); } interface USDT { function approve(address guy, uint256 wad) external; function transfer(address _to, uint256 _value) external; } interface WETH { function name() external view returns (string memory); function approve(address guy, uint256 wad) external returns (bool); function totalSupply() external view returns (uint256); function transferFrom( address src, address dst, uint256 wad ) external returns (bool); function withdraw(uint256 wad) external; function decimals() external view returns (uint8); function balanceOf(address) external view returns (uint256); function symbol() external view returns (string memory); function transfer(address dst, uint256 wad) external returns (bool); function deposit() external payable; function allowance(address, address) external view returns (uint256); } contract CarefulMath { /** * @dev Possible error codes that we can return */ enum MathError { NO_ERROR, DIVISION_BY_ZERO, INTEGER_OVERFLOW, INTEGER_UNDERFLOW } /** * @dev Multiplies two numbers, returns an error on overflow. */ function mulUInt(uint a, uint b) internal pure returns (MathError, uint) { if (a == 0) { return (MathError.NO_ERROR, 0); } uint c = a * b; if (c / a != b) { return (MathError.INTEGER_OVERFLOW, 0); } else { return (MathError.NO_ERROR, c); } } /** * @dev Integer division of two numbers, truncating the quotient. */ function divUInt(uint a, uint b) internal pure returns (MathError, uint) { if (b == 0) { return (MathError.DIVISION_BY_ZERO, 0); } return (MathError.NO_ERROR, a / b); } /** * @dev Subtracts two numbers, returns an error on overflow (i.e. if subtrahend is greater than minuend). */ function subUInt(uint a, uint b) internal pure returns (MathError, uint) { if (b <= a) { return (MathError.NO_ERROR, a - b); } else { return (MathError.INTEGER_UNDERFLOW, 0); } } /** * @dev Adds two numbers, returns an error on overflow. */ function addUInt(uint a, uint b) internal pure returns (MathError, uint) { uint c = a + b; if (c >= a) { return (MathError.NO_ERROR, c); } else { return (MathError.INTEGER_OVERFLOW, 0); } } /** * @dev add a and b and then subtract c */ function addThenSubUInt(uint a, uint b, uint c) internal pure returns (MathError, uint) { (MathError err0, uint sum) = addUInt(a, b); if (err0 != MathError.NO_ERROR) { return (err0, 0); } return subUInt(sum, c); } } abstract contract Context { function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } library EnumerableSet { // To implement this library for multiple types with as little code // repetition as possible, we write it in terms of a generic Set type with // bytes32 values. // The Set implementation uses private functions, and user-facing // implementations (such as AddressSet) are just wrappers around the // underlying Set. // This means that we can only create new EnumerableSets for types that fit // in bytes32. struct Set { // Storage of set values bytes32[] _values; // Position of the value in the `values` array, plus 1 because index 0 // means a value is not in the set. mapping (bytes32 => uint256) _indexes; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function _add(Set storage set, bytes32 value) private returns (bool) { if (!_contains(set, value)) { set._values.push(value); // The value is stored at length-1, but we add 1 to all indexes // and use 0 as a sentinel value set._indexes[value] = set._values.length; return true; } else { return false; } } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function _remove(Set storage set, bytes32 value) private returns (bool) { // We read and store the value's index to prevent multiple reads from the same storage slot uint256 valueIndex = set._indexes[value]; if (valueIndex != 0) { // Equivalent to contains(set, value) // To delete an element from the _values array in O(1), we swap the element to delete with the last one in // the array, and then remove the last element (sometimes called as 'swap and pop'). // This modifies the order of the array, as noted in {at}. uint256 toDeleteIndex = valueIndex - 1; uint256 lastIndex = set._values.length - 1; // When the value to delete is the last one, the swap operation is unnecessary. However, since this occurs // so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement. bytes32 lastvalue = set._values[lastIndex]; // Move the last value to the index where the value to delete is set._values[toDeleteIndex] = lastvalue; // Update the index for the moved value set._indexes[lastvalue] = toDeleteIndex + 1; // All indexes are 1-based // Delete the slot where the moved value was stored set._values.pop(); // Delete the index for the deleted slot delete set._indexes[value]; return true; } else { return false; } } /** * @dev Returns true if the value is in the set. O(1). */ function _contains(Set storage set, bytes32 value) private view returns (bool) { return set._indexes[value] != 0; } /** * @dev Returns the number of values on the set. O(1). */ function _length(Set storage set) private view returns (uint256) { return set._values.length; } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function _at(Set storage set, uint256 index) private view returns (bytes32) { require(set._values.length > index, "EnumerableSet: index out of bounds"); return set._values[index]; } // AddressSet struct AddressSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(AddressSet storage set, address value) internal returns (bool) { return _add(set._inner, bytes32(uint256(value))); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(AddressSet storage set, address value) internal returns (bool) { return _remove(set._inner, bytes32(uint256(value))); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(AddressSet storage set, address value) internal view returns (bool) { return _contains(set._inner, bytes32(uint256(value))); } /** * @dev Returns the number of values in the set. O(1). */ function length(AddressSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(AddressSet storage set, uint256 index) internal view returns (address) { return address(uint256(_at(set._inner, index))); } // UintSet struct UintSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(UintSet storage set, uint256 value) internal returns (bool) { return _add(set._inner, bytes32(value)); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(UintSet storage set, uint256 value) internal returns (bool) { return _remove(set._inner, bytes32(value)); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(UintSet storage set, uint256 value) internal view returns (bool) { return _contains(set._inner, bytes32(value)); } /** * @dev Returns the number of values on the set. O(1). */ function length(UintSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(UintSet storage set, uint256 index) internal view returns (uint256) { return uint256(_at(set._inner, index)); } } interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. uint256 size; // solhint-disable-next-line no-inline-assembly assembly { size := extcodesize(account) } return size > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain`call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return _functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); return _functionCallWithValue(target, data, value, errorMessage); } function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) { require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: weiValue }(data); if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } contract ERC20 is Context, IERC20 { using SafeMath for uint256; using Address for address; mapping (address => uint256) private _balances; mapping (address => mapping (address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; uint8 private _decimals; /** * @dev Sets the values for {name} and {symbol}, initializes {decimals} with * a default value of 18. * * To select a different value for {decimals}, use {_setupDecimals}. * * All three of these values are immutable: they can only be set once during * construction. */ constructor (string memory name, string memory symbol) public { _name = name; _symbol = symbol; _decimals = 18; } /** * @dev Returns the name of the token. */ function name() public view returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5,05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is * called. * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view returns (uint8) { return _decimals; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `recipient` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address recipient, uint256 amount) public virtual override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { _approve(_msgSender(), spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}; * * Requirements: * - `sender` and `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. * - the caller must have allowance for ``sender``'s tokens of at least * `amount`. */ function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) { _transfer(sender, recipient, amount); _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance")); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue)); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero")); return true; } /** * @dev Moves tokens `amount` from `sender` to `recipient`. * * This is internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `sender` cannot be the zero address. * - `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. */ function _transfer(address sender, address recipient, uint256 amount) internal virtual { require(sender != address(0), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(sender, recipient, amount); _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance"); _balances[recipient] = _balances[recipient].add(amount); emit Transfer(sender, recipient, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements * * - `to` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply = _totalSupply.add(amount); _balances[account] = _balances[account].add(amount); emit Transfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance"); _totalSupply = _totalSupply.sub(amount); emit Transfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens. * * This internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve(address owner, address spender, uint256 amount) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Sets {decimals} to a value other than the default one of 18. * * WARNING: This function should only be called from the constructor. Most * applications that interact with token contracts will not expect * {decimals} to ever change, and may work incorrectly if it does. */ function _setupDecimals(uint8 decimals_) internal { _decimals = decimals_; } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be to transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { } } library SafeERC20 { using SafeMath for uint256; using Address for address; function safeTransfer(IERC20 token, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value)); } /** * @dev Deprecated. This function has issues similar to the ones found in * {IERC20-approve}, and its usage is discouraged. * * Whenever possible, use {safeIncreaseAllowance} and * {safeDecreaseAllowance} instead. */ function safeApprove(IERC20 token, address spender, uint256 value) internal { // safeApprove should only be called when setting an initial allowance, // or when resetting it to zero. To increase and decrease it, use // 'safeIncreaseAllowance' and 'safeDecreaseAllowance' // solhint-disable-next-line max-line-length require((value == 0) || (token.allowance(address(this), spender) == 0), "SafeERC20: approve from non-zero to non-zero allowance" ); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value)); } function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).add(value); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero"); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). */ function _callOptionalReturn(IERC20 token, bytes memory data) private { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that // the target address contains contract code and also asserts for success in the low-level call. bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed"); if (returndata.length > 0) { // Return data is optional // solhint-disable-next-line max-line-length require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } } } contract Exponential is CarefulMath { uint constant expScale = 1e18; uint constant doubleScale = 1e36; uint constant halfExpScale = expScale/2; uint constant mantissaOne = expScale; struct Exp { uint mantissa; } struct Double { uint mantissa; } /** * @dev Creates an exponential from numerator and denominator values. * Note: Returns an error if (`num` * 10e18) > MAX_INT, * or if `denom` is zero. */ function getExp(uint num, uint denom) pure internal returns (MathError, Exp memory) { (MathError err0, uint scaledNumerator) = mulUInt(num, expScale); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } (MathError err1, uint rational) = divUInt(scaledNumerator, denom); if (err1 != MathError.NO_ERROR) { return (err1, Exp({mantissa: 0})); } return (MathError.NO_ERROR, Exp({mantissa: rational})); } /** * @dev Adds two exponentials, returning a new exponential. */ function addExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) { (MathError error, uint result) = addUInt(a.mantissa, b.mantissa); return (error, Exp({mantissa: result})); } /** * @dev Subtracts two exponentials, returning a new exponential. */ function subExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) { (MathError error, uint result) = subUInt(a.mantissa, b.mantissa); return (error, Exp({mantissa: result})); } /** * @dev Multiply an Exp by a scalar, returning a new Exp. */ function mulScalar(Exp memory a, uint scalar) pure internal returns (MathError, Exp memory) { (MathError err0, uint scaledMantissa) = mulUInt(a.mantissa, scalar); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } return (MathError.NO_ERROR, Exp({mantissa: scaledMantissa})); } /** * @dev Multiply an Exp by a scalar, then truncate to return an unsigned integer. */ function mulScalarTruncate(Exp memory a, uint scalar) pure internal returns (MathError, uint) { (MathError err, Exp memory product) = mulScalar(a, scalar); if (err != MathError.NO_ERROR) { return (err, 0); } return (MathError.NO_ERROR, truncate(product)); } /** * @dev Multiply an Exp by a scalar, truncate, then add an to an unsigned integer, returning an unsigned integer. */ function mulScalarTruncateAddUInt(Exp memory a, uint scalar, uint addend) pure internal returns (MathError, uint) { (MathError err, Exp memory product) = mulScalar(a, scalar); if (err != MathError.NO_ERROR) { return (err, 0); } return addUInt(truncate(product), addend); } /** * @dev Divide an Exp by a scalar, returning a new Exp. */ function divScalar(Exp memory a, uint scalar) pure internal returns (MathError, Exp memory) { (MathError err0, uint descaledMantissa) = divUInt(a.mantissa, scalar); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } return (MathError.NO_ERROR, Exp({mantissa: descaledMantissa})); } /** * @dev Divide a scalar by an Exp, returning a new Exp. */ function divScalarByExp(uint scalar, Exp memory divisor) pure internal returns (MathError, Exp memory) { /* We are doing this as: getExp(mulUInt(expScale, scalar), divisor.mantissa) How it works: Exp = a / b; Scalar = s; `s / (a / b)` = `b * s / a` and since for an Exp `a = mantissa, b = expScale` */ (MathError err0, uint numerator) = mulUInt(expScale, scalar); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } return getExp(numerator, divisor.mantissa); } /** * @dev Divide a scalar by an Exp, then truncate to return an unsigned integer. */ function divScalarByExpTruncate(uint scalar, Exp memory divisor) pure internal returns (MathError, uint) { (MathError err, Exp memory fraction) = divScalarByExp(scalar, divisor); if (err != MathError.NO_ERROR) { return (err, 0); } return (MathError.NO_ERROR, truncate(fraction)); } /** * @dev Multiplies two exponentials, returning a new exponential. */ function mulExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) { (MathError err0, uint doubleScaledProduct) = mulUInt(a.mantissa, b.mantissa); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } // We add half the scale before dividing so that we get rounding instead of truncation. // See "Listing 6" and text above it at https://accu.org/index.php/journals/1717 // Without this change, a result like 6.6...e-19 will be truncated to 0 instead of being rounded to 1e-18. (MathError err1, uint doubleScaledProductWithHalfScale) = addUInt(halfExpScale, doubleScaledProduct); if (err1 != MathError.NO_ERROR) { return (err1, Exp({mantissa: 0})); } (MathError err2, uint product) = divUInt(doubleScaledProductWithHalfScale, expScale); // The only error `div` can return is MathError.DIVISION_BY_ZERO but we control `expScale` and it is not zero. assert(err2 == MathError.NO_ERROR); return (MathError.NO_ERROR, Exp({mantissa: product})); } /** * @dev Multiplies two exponentials given their mantissas, returning a new exponential. */ function mulExp(uint a, uint b) pure internal returns (MathError, Exp memory) { return mulExp(Exp({mantissa: a}), Exp({mantissa: b})); } /** * @dev Multiplies three exponentials, returning a new exponential. */ function mulExp3(Exp memory a, Exp memory b, Exp memory c) pure internal returns (MathError, Exp memory) { (MathError err, Exp memory ab) = mulExp(a, b); if (err != MathError.NO_ERROR) { return (err, ab); } return mulExp(ab, c); } /** * @dev Divides two exponentials, returning a new exponential. * (a/scale) / (b/scale) = (a/scale) * (scale/b) = a/b, * which we can scale as an Exp by calling getExp(a.mantissa, b.mantissa) */ function divExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) { return getExp(a.mantissa, b.mantissa); } /** * @dev Truncates the given exp to a whole number value. * For example, truncate(Exp{mantissa: 15 * expScale}) = 15 */ function truncate(Exp memory exp) pure internal returns (uint) { // Note: We are not using careful math here as we're performing a division that cannot fail return exp.mantissa / expScale; } /** * @dev Checks if first Exp is less than second Exp. */ function lessThanExp(Exp memory left, Exp memory right) pure internal returns (bool) { return left.mantissa < right.mantissa; } /** * @dev Checks if left Exp <= right Exp. */ function lessThanOrEqualExp(Exp memory left, Exp memory right) pure internal returns (bool) { return left.mantissa <= right.mantissa; } /** * @dev Checks if left Exp > right Exp. */ function greaterThanExp(Exp memory left, Exp memory right) pure internal returns (bool) { return left.mantissa > right.mantissa; } /** * @dev returns true if Exp is exactly zero */ function isZeroExp(Exp memory value) pure internal returns (bool) { return value.mantissa == 0; } function safe224(uint n, string memory errorMessage) pure internal returns (uint224) { require(n < 2**224, errorMessage); return uint224(n); } function safe32(uint n, string memory errorMessage) pure internal returns (uint32) { require(n < 2**32, errorMessage); return uint32(n); } function add_(Exp memory a, Exp memory b) pure internal returns (Exp memory) { return Exp({mantissa: add_(a.mantissa, b.mantissa)}); } function add_(Double memory a, Double memory b) pure internal returns (Double memory) { return Double({mantissa: add_(a.mantissa, b.mantissa)}); } function add_(uint a, uint b) pure internal returns (uint) { return add_(a, b, "addition overflow"); } function add_(uint a, uint b, string memory errorMessage) pure internal returns (uint) { uint c = a + b; require(c >= a, errorMessage); return c; } function sub_(Exp memory a, Exp memory b) pure internal returns (Exp memory) { return Exp({mantissa: sub_(a.mantissa, b.mantissa)}); } function sub_(Double memory a, Double memory b) pure internal returns (Double memory) { return Double({mantissa: sub_(a.mantissa, b.mantissa)}); } function sub_(uint a, uint b) pure internal returns (uint) { return sub_(a, b, "subtraction underflow"); } function sub_(uint a, uint b, string memory errorMessage) pure internal returns (uint) { require(b <= a, errorMessage); return a - b; } function mul_(Exp memory a, Exp memory b) pure internal returns (Exp memory) { return Exp({mantissa: mul_(a.mantissa, b.mantissa) / expScale}); } function mul_(Exp memory a, uint b) pure internal returns (Exp memory) { return Exp({mantissa: mul_(a.mantissa, b)}); } function mul_(uint a, Exp memory b) pure internal returns (uint) { return mul_(a, b.mantissa) / expScale; } function mul_(Double memory a, Double memory b) pure internal returns (Double memory) { return Double({mantissa: mul_(a.mantissa, b.mantissa) / doubleScale}); } function mul_(Double memory a, uint b) pure internal returns (Double memory) { return Double({mantissa: mul_(a.mantissa, b)}); } function mul_(uint a, Double memory b) pure internal returns (uint) { return mul_(a, b.mantissa) / doubleScale; } function mul_(uint a, uint b) pure internal returns (uint) { return mul_(a, b, "multiplication overflow"); } function mul_(uint a, uint b, string memory errorMessage) pure internal returns (uint) { if (a == 0 || b == 0) { return 0; } uint c = a * b; require(c / a == b, errorMessage); return c; } function div_(Exp memory a, Exp memory b) pure internal returns (Exp memory) { return Exp({mantissa: div_(mul_(a.mantissa, expScale), b.mantissa)}); } function div_(Exp memory a, uint b) pure internal returns (Exp memory) { return Exp({mantissa: div_(a.mantissa, b)}); } function div_(uint a, Exp memory b) pure internal returns (uint) { return div_(mul_(a, expScale), b.mantissa); } function div_(Double memory a, Double memory b) pure internal returns (Double memory) { return Double({mantissa: div_(mul_(a.mantissa, doubleScale), b.mantissa)}); } function div_(Double memory a, uint b) pure internal returns (Double memory) { return Double({mantissa: div_(a.mantissa, b)}); } function div_(uint a, Double memory b) pure internal returns (uint) { return div_(mul_(a, doubleScale), b.mantissa); } function div_(uint a, uint b) pure internal returns (uint) { return div_(a, b, "divide by zero"); } function div_(uint a, uint b, string memory errorMessage) pure internal returns (uint) { require(b > 0, errorMessage); return a / b; } function fraction(uint a, uint b) pure internal returns (Double memory) { return Double({mantissa: div_(mul_(a, doubleScale), b)}); } } contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor () internal { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), msgSender); } /** * @dev Returns the address of the current owner. */ function owner() public view returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(_owner == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { emit OwnershipTransferred(_owner, address(0)); _owner = address(0); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } } contract Owned { address public owner; address public nominatedOwner; constructor(address _owner) public { require(_owner != address(0), "Owner address cannot be 0"); owner = _owner; emit OwnerChanged(address(0), _owner); } function nominateNewOwner(address _owner) external onlyOwner { nominatedOwner = _owner; emit OwnerNominated(_owner); } function acceptOwnership() external { require( msg.sender == nominatedOwner, "You must be nominated before you can accept ownership" ); emit OwnerChanged(owner, nominatedOwner); owner = nominatedOwner; nominatedOwner = address(0); } modifier onlyOwner { _onlyOwner(); _; } function _onlyOwner() private view { require( msg.sender == owner, "Only the contract owner may perform this action" ); } event OwnerNominated(address newOwner); event OwnerChanged(address oldOwner, address newOwner); } abstract contract Pausable is Owned { uint256 public lastPauseTime; bool public paused; constructor() internal { // This contract is abstract, and thus cannot be instantiated directly require(owner != address(0), "Owner must be set"); // Paused will be false, and lastPauseTime will be 0 upon initialisation } /** * @notice Change the paused state of the contract * @dev Only the contract owner may call this. */ function setPaused(bool _paused) external onlyOwner { // Ensure we're actually changing the state before we do anything if (_paused == paused) { return; } // Set our paused state. paused = _paused; // If applicable, set the last pause time. if (paused) { lastPauseTime = now; } // Let everyone know that our pause state has changed. emit PauseChanged(paused); } event PauseChanged(bool isPaused); modifier notPaused { require( !paused, "This action cannot be performed while the contract is paused" ); _; } } contract ReentrancyGuard { // Booleans are more expensive than uint256 or any type that takes up a full // word because each write operation emits an extra SLOAD to first read the // slot's contents, replace the bits taken up by the boolean, and then write // back. This is the compiler's defense against contract upgrades and // pointer aliasing, and it cannot be disabled. // The values being non-zero value makes deployment a bit more expensive, // but in exchange the refund on every call to nonReentrant will be lower in // amount. Since refunds are capped to a percentage of the total // transaction's gas, it is best to keep them low in cases like this one, to // increase the likelihood of the full refund coming into effect. uint256 private constant _NOT_ENTERED = 1; uint256 private constant _ENTERED = 2; uint256 private _status; constructor () internal { _status = _NOT_ENTERED; } /** * @dev Prevents a contract from calling itself, directly or indirectly. * Calling a `nonReentrant` function from another `nonReentrant` * function is not supported. It is possible to prevent this from happening * by making the `nonReentrant` function external, and make it call a * `private` function that does the actual work. */ modifier nonReentrant() { // On the first call to nonReentrant, _notEntered will be true require(_status != _ENTERED, "ReentrancyGuard: reentrant call"); // Any calls to nonReentrant after this point will fail _status = _ENTERED; _; // By storing the original value once again, a refund is triggered (see // https://eips.ethereum.org/EIPS/eip-2200) _status = _NOT_ENTERED; } } library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } contract PickleJar is ERC20 { using SafeERC20 for IERC20; using Address for address; using SafeMath for uint256; IERC20 public token; uint256 public min = 9500; uint256 public constant max = 10000; address public governance; address public timelock; address public controller; constructor(address _token, address _governance, address _timelock, address _controller) public ERC20( string(abi.encodePacked("pickling ", ERC20(_token).name())), string(abi.encodePacked("p", ERC20(_token).symbol())) ) { _setupDecimals(ERC20(_token).decimals()); token = IERC20(_token); governance = _governance; timelock = _timelock; controller = _controller; } function balance() public view returns (uint256) { return token.balanceOf(address(this)).add( IController(controller).balanceOf(address(token)) ); } function setMin(uint256 _min) external { require(msg.sender == governance, "!governance"); min = _min; } function setGovernance(address _governance) public { require(msg.sender == governance, "!governance"); governance = _governance; } function setTimelock(address _timelock) public { require(msg.sender == timelock, "!timelock"); timelock = _timelock; } function setController(address _controller) public { require(msg.sender == timelock, "!timelock"); controller = _controller; } // Custom logic in here for how much the jars allows to be borrowed // Sets minimum required on-hand to keep small withdrawals cheap function available() public view returns (uint256) { return token.balanceOf(address(this)).mul(min).div(max); } function earn() public { uint256 _bal = available(); token.safeTransfer(controller, _bal); IController(controller).earn(address(token), _bal); } function depositAll() external { deposit(token.balanceOf(msg.sender)); } function deposit(uint256 _amount) public { uint256 _pool = balance(); uint256 _before = token.balanceOf(address(this)); token.safeTransferFrom(msg.sender, address(this), _amount); uint256 _after = token.balanceOf(address(this)); _amount = _after.sub(_before); // Additional check for deflationary tokens uint256 shares = 0; if (totalSupply() == 0) { shares = _amount; } else { shares = (_amount.mul(totalSupply())).div(_pool); } _mint(msg.sender, shares); } function withdrawAll() external { withdraw(balanceOf(msg.sender)); } // Used to swap any borrowed reserve over the debt limit to liquidate to 'token' function harvest(address reserve, uint256 amount) external { require(msg.sender == controller, "!controller"); require(reserve != address(token), "token"); IERC20(reserve).safeTransfer(controller, amount); } // No rebalance implementation for lower fees and faster swaps function withdraw(uint256 _shares) public { uint256 r = (balance().mul(_shares)).div(totalSupply()); _burn(msg.sender, _shares); // Check balance uint256 b = token.balanceOf(address(this)); if (b < r) { uint256 _withdraw = r.sub(b); IController(controller).withdraw(address(token), _withdraw); uint256 _after = token.balanceOf(address(this)); uint256 _diff = _after.sub(b); if (_diff < _withdraw) { r = b.add(_diff); } } token.safeTransfer(msg.sender, r); } function getRatio() public view returns (uint256) { return balance().mul(1e18).div(totalSupply()); } } contract PickleSwap { using SafeERC20 for IERC20; UniswapRouterV2 router = UniswapRouterV2( 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D ); address public constant weth = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; function convertWETHPair( address fromLP, address toLP, uint256 value ) public { IUniswapV2Pair fromPair = IUniswapV2Pair(fromLP); IUniswapV2Pair toPair = IUniswapV2Pair(toLP); // Only for WETH/<TOKEN> pairs if (!(fromPair.token0() == weth || fromPair.token1() == weth)) { revert("!eth-from"); } if (!(toPair.token0() == weth || toPair.token1() == weth)) { revert("!eth-to"); } // Get non-eth token from pairs address _from = fromPair.token0() != weth ? fromPair.token0() : fromPair.token1(); address _to = toPair.token0() != weth ? toPair.token0() : toPair.token1(); // Transfer IERC20(fromLP).safeTransferFrom(msg.sender, address(this), value); // Remove liquidity IERC20(fromLP).safeApprove(address(router), 0); IERC20(fromLP).safeApprove(address(router), value); router.removeLiquidity( fromPair.token0(), fromPair.token1(), value, 0, 0, address(this), now + 60 ); // Convert to target token address[] memory path = new address[](3); path[0] = _from; path[1] = weth; path[2] = _to; IERC20(_from).safeApprove(address(router), 0); IERC20(_from).safeApprove(address(router), uint256(-1)); router.swapExactTokensForTokens( IERC20(_from).balanceOf(address(this)), 0, path, address(this), now + 60 ); // Supply liquidity IERC20(weth).safeApprove(address(router), 0); IERC20(weth).safeApprove(address(router), uint256(-1)); IERC20(_to).safeApprove(address(router), 0); IERC20(_to).safeApprove(address(router), uint256(-1)); router.addLiquidity( weth, _to, IERC20(weth).balanceOf(address(this)), IERC20(_to).balanceOf(address(this)), 0, 0, msg.sender, now + 60 ); // Refund sender any remaining tokens IERC20(weth).safeTransfer( msg.sender, IERC20(weth).balanceOf(address(this)) ); IERC20(_to).safeTransfer(msg.sender, IERC20(_to).balanceOf(address(this))); } } contract CurveProxyLogic { using SafeMath for uint256; using SafeERC20 for IERC20; function remove_liquidity_one_coin( address curve, address curveLp, int128 index ) public { uint256 lpAmount = IERC20(curveLp).balanceOf(address(this)); IERC20(curveLp).safeApprove(curve, 0); IERC20(curveLp).safeApprove(curve, lpAmount); ICurveZap(curve).remove_liquidity_one_coin(lpAmount, index, 0); } function add_liquidity( address curve, bytes4 curveFunctionSig, uint256 curvePoolSize, uint256 curveUnderlyingIndex, address underlying ) public { uint256 underlyingAmount = IERC20(underlying).balanceOf(address(this)); // curveFunctionSig should be the abi.encodedFormat of // add_liquidity(uint256[N_COINS],uint256) // The reason why its here is because different curve pools // have a different function signature uint256[] memory liquidity = new uint256[](curvePoolSize); liquidity[curveUnderlyingIndex] = underlyingAmount; bytes memory callData = abi.encodePacked( curveFunctionSig, liquidity, uint256(0) ); IERC20(underlying).safeApprove(curve, 0); IERC20(underlying).safeApprove(curve, underlyingAmount); (bool success, ) = curve.call(callData); require(success, "!success"); } } contract UniswapV2ProxyLogic { using SafeMath for uint256; using SafeERC20 for IERC20; IUniswapV2Factory public constant factory = IUniswapV2Factory( 0x5C69bEe701ef814a2B6a3EDD4B1652CB9cc5aA6f ); UniswapRouterV2 public constant router = UniswapRouterV2( 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D ); address public constant weth = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; // babylonian method (https://en.wikipedia.org/wiki/Methods_of_computing_square_roots#Babylonian_method) function sqrt(uint256 y) internal pure returns (uint256 z) { if (y > 3) { z = y; uint256 x = y / 2 + 1; while (x < z) { z = x; x = (y / x + x) / 2; } } else if (y != 0) { z = 1; } } function getSwapAmt(uint256 amtA, uint256 resA) internal pure returns (uint256) { return sqrt(amtA.mul(resA.mul(3988000).add(amtA.mul(3988009)))) .sub(amtA.mul(1997)) .div(1994); } // https://blog.alphafinance.io/onesideduniswap/ // https://github.com/AlphaFinanceLab/alphahomora/blob/88a8dfe4d4fa62b13b40f7983ee2c646f83e63b5/contracts/StrategyAddETHOnly.sol#L39 // AlphaFinance is gripbook licensed function optimalOneSideSupply( IUniswapV2Pair pair, address from, address to ) public { address[] memory path = new address[](2); // 1. Compute optimal amount of WETH to be converted (uint256 r0, uint256 r1, ) = pair.getReserves(); uint256 rIn = pair.token0() == from ? r0 : r1; uint256 aIn = getSwapAmt(rIn, IERC20(from).balanceOf(address(this))); // 2. Convert that from -> to path[0] = from; path[1] = to; IERC20(from).safeApprove(address(router), 0); IERC20(from).safeApprove(address(router), aIn); router.swapExactTokensForTokens(aIn, 0, path, address(this), now + 60); } function swapUniswap(address from, address to) public { require(to != address(0)); address[] memory path; if (from == weth || to == weth) { path = new address[](2); path[0] = from; path[1] = to; } else { path = new address[](3); path[0] = from; path[1] = weth; path[2] = to; } uint256 amount = IERC20(from).balanceOf(address(this)); IERC20(from).safeApprove(address(router), 0); IERC20(from).safeApprove(address(router), amount); router.swapExactTokensForTokens( amount, 0, path, address(this), now + 60 ); } function removeLiquidity(IUniswapV2Pair pair) public { uint256 _balance = pair.balanceOf(address(this)); pair.approve(address(router), _balance); router.removeLiquidity( pair.token0(), pair.token1(), _balance, 0, 0, address(this), now + 60 ); } function supplyLiquidity( address token0, address token1 ) public returns (uint256) { // Add liquidity to uniswap IERC20(token0).safeApprove(address(router), 0); IERC20(token0).safeApprove( address(router), IERC20(token0).balanceOf(address(this)) ); IERC20(token1).safeApprove(address(router), 0); IERC20(token1).safeApprove( address(router), IERC20(token1).balanceOf(address(this)) ); (, , uint256 _to) = router.addLiquidity( token0, token1, IERC20(token0).balanceOf(address(this)), IERC20(token1).balanceOf(address(this)), 0, 0, address(this), now + 60 ); return _to; } function refundDust(IUniswapV2Pair pair, address recipient) public { address token0 = pair.token0(); address token1 = pair.token1(); IERC20(token0).safeTransfer( recipient, IERC20(token0).balanceOf(address(this)) ); IERC20(token1).safeTransfer( recipient, IERC20(token1).balanceOf(address(this)) ); } function lpTokensToPrimitive( IUniswapV2Pair from, address to ) public { if (from.token0() != weth && from.token1() != weth) { revert("!from-weth-pair"); } address fromOther = from.token0() == weth ? from.token1() : from.token0(); // Removes liquidity removeLiquidity(from); // Swap from WETH to other swapUniswap(weth, to); // If from is not to, we swap them too if (fromOther != to) { swapUniswap(fromOther, to); } } function primitiveToLpTokens( address from, IUniswapV2Pair to, address dustRecipient ) public { if (to.token0() != weth && to.token1() != weth) { revert("!to-weth-pair"); } address toOther = to.token0() == weth ? to.token1() : to.token0(); // Swap to WETH swapUniswap(from, weth); // Optimal supply from WETH to optimalOneSideSupply(to, weth, toOther); // Supply tokens supplyLiquidity(weth, toOther); // Dust refundDust(to, dustRecipient); } function swapUniLPTokens( IUniswapV2Pair from, IUniswapV2Pair to, address dustRecipient ) public { if (from.token0() != weth && from.token1() != weth) { revert("!from-weth-pair"); } if (to.token0() != weth && to.token1() != weth) { revert("!to-weth-pair"); } address fromOther = from.token0() == weth ? from.token1() : from.token0(); address toOther = to.token0() == weth ? to.token1() : to.token0(); // Remove weth-<token> pair removeLiquidity(from); // Swap <token> to WETH swapUniswap(fromOther, weth); // Optimal supply from WETH to <other-token> optimalOneSideSupply(to, weth, toOther); // Supply weth-<other-token> pair supplyLiquidity(weth, toOther); // Refund dust refundDust(to, dustRecipient); } } contract StakingRewards is ReentrancyGuard, Pausable { using SafeMath for uint256; using SafeERC20 for IERC20; /* ========== STATE VARIABLES ========== */ IERC20 public rewardsToken; IERC20 public stakingToken; uint256 public periodFinish = 0; uint256 public rewardRate = 0; uint256 public rewardsDuration = 7 days; uint256 public lastUpdateTime; uint256 public rewardPerTokenStored; mapping(address => uint256) public userRewardPerTokenPaid; mapping(address => uint256) public rewards; uint256 private _totalSupply; mapping(address => uint256) private _balances; /* ========== CONSTRUCTOR ========== */ constructor( address _owner, address _rewardsToken, address _stakingToken ) public Owned(_owner) { rewardsToken = IERC20(_rewardsToken); stakingToken = IERC20(_stakingToken); } /* ========== VIEWS ========== */ function totalSupply() external view returns (uint256) { return _totalSupply; } function balanceOf(address account) external view returns (uint256) { return _balances[account]; } function lastTimeRewardApplicable() public view returns (uint256) { return min(block.timestamp, periodFinish); } function rewardPerToken() public view returns (uint256) { if (_totalSupply == 0) { return rewardPerTokenStored; } return rewardPerTokenStored.add( lastTimeRewardApplicable() .sub(lastUpdateTime) .mul(rewardRate) .mul(1e18) .div(_totalSupply) ); } function earned(address account) public view returns (uint256) { return _balances[account] .mul(rewardPerToken().sub(userRewardPerTokenPaid[account])) .div(1e18) .add(rewards[account]); } function getRewardForDuration() external view returns (uint256) { return rewardRate.mul(rewardsDuration); } function min(uint256 a, uint256 b) public pure returns (uint256) { return a < b ? a : b; } /* ========== MUTATIVE FUNCTIONS ========== */ function stake(uint256 amount) external nonReentrant notPaused updateReward(msg.sender) { require(amount > 0, "Cannot stake 0"); _totalSupply = _totalSupply.add(amount); _balances[msg.sender] = _balances[msg.sender].add(amount); stakingToken.safeTransferFrom(msg.sender, address(this), amount); emit Staked(msg.sender, amount); } function withdraw(uint256 amount) public nonReentrant updateReward(msg.sender) { require(amount > 0, "Cannot withdraw 0"); _totalSupply = _totalSupply.sub(amount); _balances[msg.sender] = _balances[msg.sender].sub(amount); stakingToken.safeTransfer(msg.sender, amount); emit Withdrawn(msg.sender, amount); } function getReward() public nonReentrant updateReward(msg.sender) { uint256 reward = rewards[msg.sender]; if (reward > 0) { rewards[msg.sender] = 0; rewardsToken.safeTransfer(msg.sender, reward); emit RewardPaid(msg.sender, reward); } } function exit() external { withdraw(_balances[msg.sender]); getReward(); } /* ========== RESTRICTED FUNCTIONS ========== */ function notifyRewardAmount(uint256 reward) external onlyOwner updateReward(address(0)) { if (block.timestamp >= periodFinish) { rewardRate = reward.div(rewardsDuration); } else { uint256 remaining = periodFinish.sub(block.timestamp); uint256 leftover = remaining.mul(rewardRate); rewardRate = reward.add(leftover).div(rewardsDuration); } // Ensure the provided reward amount is not more than the balance in the contract. // This keeps the reward rate in the right range, preventing overflows due to // very high values of rewardRate in the earned and rewardsPerToken functions; // Reward + leftover must be less than 2^256 / 10^18 to avoid overflow. uint256 balance = rewardsToken.balanceOf(address(this)); require( rewardRate <= balance.div(rewardsDuration), "Provided reward too high" ); lastUpdateTime = block.timestamp; periodFinish = block.timestamp.add(rewardsDuration); emit RewardAdded(reward); } // Added to support recovering LP Rewards from other systems such as BAL to be distributed to holders function recoverERC20(address tokenAddress, uint256 tokenAmount) external onlyOwner { // Cannot recover the staking token or the rewards token require( tokenAddress != address(stakingToken) && tokenAddress != address(rewardsToken), "Cannot withdraw the staking or rewards tokens" ); IERC20(tokenAddress).safeTransfer(owner, tokenAmount); emit Recovered(tokenAddress, tokenAmount); } function setRewardsDuration(uint256 _rewardsDuration) external onlyOwner { require( block.timestamp > periodFinish, "Previous rewards period must be complete before changing the duration for the new period" ); rewardsDuration = _rewardsDuration; emit RewardsDurationUpdated(rewardsDuration); } /* ========== MODIFIERS ========== */ modifier updateReward(address account) { rewardPerTokenStored = rewardPerToken(); lastUpdateTime = lastTimeRewardApplicable(); if (account != address(0)) { rewards[account] = earned(account); userRewardPerTokenPaid[account] = rewardPerTokenStored; } _; } /* ========== EVENTS ========== */ event RewardAdded(uint256 reward); event Staked(address indexed user, uint256 amount); event Withdrawn(address indexed user, uint256 amount); event RewardPaid(address indexed user, uint256 reward); event RewardsDurationUpdated(uint256 newDuration); event Recovered(address token, uint256 amount); } contract CRVLocker { using SafeERC20 for IERC20; using Address for address; using SafeMath for uint256; address public constant mintr = 0xd061D61a4d941c39E5453435B6345Dc261C2fcE0; address public constant crv = 0xD533a949740bb3306d119CC777fa900bA034cd52; address public constant escrow = 0x5f3b5DfEb7B28CDbD7FAba78963EE202a494e2A2; address public governance; mapping(address => bool) public voters; constructor(address _governance) public { governance = _governance; } function getName() external pure returns (string memory) { return "CRVLocker"; } function addVoter(address _voter) external { require(msg.sender == governance, "!governance"); voters[_voter] = true; } function removeVoter(address _voter) external { require(msg.sender == governance, "!governance"); voters[_voter] = false; } function withdraw(address _asset) external returns (uint256 balance) { require(voters[msg.sender], "!voter"); balance = IERC20(_asset).balanceOf(address(this)); IERC20(_asset).safeTransfer(msg.sender, balance); } function createLock(uint256 _value, uint256 _unlockTime) external { require(voters[msg.sender] || msg.sender == governance, "!authorized"); IERC20(crv).safeApprove(escrow, 0); IERC20(crv).safeApprove(escrow, _value); ICurveVotingEscrow(escrow).create_lock(_value, _unlockTime); } function increaseAmount(uint256 _value) external { require(voters[msg.sender] || msg.sender == governance, "!authorized"); IERC20(crv).safeApprove(escrow, 0); IERC20(crv).safeApprove(escrow, _value); ICurveVotingEscrow(escrow).increase_amount(_value); } function increaseUnlockTime(uint256 _unlockTime) external { require(voters[msg.sender] || msg.sender == governance, "!authorized"); ICurveVotingEscrow(escrow).increase_unlock_time(_unlockTime); } function release() external { require(voters[msg.sender] || msg.sender == governance, "!authorized"); ICurveVotingEscrow(escrow).withdraw(); } function setGovernance(address _governance) external { require(msg.sender == governance, "!governance"); governance = _governance; } function execute( address to, uint256 value, bytes calldata data ) external returns (bool, bytes memory) { require(voters[msg.sender] || msg.sender == governance, "!governance"); (bool success, bytes memory result) = to.call{value: value}(data); require(success, "!execute-success"); return (success, result); } } contract SCRVVoter { using SafeERC20 for IERC20; using Address for address; using SafeMath for uint256; CRVLocker public crvLocker; address public constant want = 0xC25a3A3b969415c80451098fa907EC722572917F; address public constant mintr = 0xd061D61a4d941c39E5453435B6345Dc261C2fcE0; address public constant crv = 0xD533a949740bb3306d119CC777fa900bA034cd52; address public constant snx = 0xC011a73ee8576Fb46F5E1c5751cA3B9Fe0af2a6F; address public constant gaugeController = 0x2F50D538606Fa9EDD2B11E2446BEb18C9D5846bB; address public constant scrvGauge = 0xA90996896660DEcC6E997655E065b23788857849; mapping(address => bool) public strategies; address public governance; constructor(address _governance, address _crvLocker) public { governance = _governance; crvLocker = CRVLocker(_crvLocker); } function setGovernance(address _governance) external { require(msg.sender == governance, "!governance"); governance = _governance; } function approveStrategy(address _strategy) external { require(msg.sender == governance, "!governance"); strategies[_strategy] = true; } function revokeStrategy(address _strategy) external { require(msg.sender == governance, "!governance"); strategies[_strategy] = false; } function lock() external { crvLocker.increaseAmount(IERC20(crv).balanceOf(address(crvLocker))); } function vote(address _gauge, uint256 _amount) public { require(strategies[msg.sender], "!strategy"); crvLocker.execute( gaugeController, 0, abi.encodeWithSignature( "vote_for_gauge_weights(address,uint256)", _gauge, _amount ) ); } function max() external { require(strategies[msg.sender], "!strategy"); vote(scrvGauge, 10000); } function withdraw( address _gauge, address _token, uint256 _amount ) public returns (uint256) { require(strategies[msg.sender], "!strategy"); uint256 _before = IERC20(_token).balanceOf(address(crvLocker)); crvLocker.execute( _gauge, 0, abi.encodeWithSignature("withdraw(uint256)", _amount) ); uint256 _after = IERC20(_token).balanceOf(address(crvLocker)); uint256 _net = _after.sub(_before); crvLocker.execute( _token, 0, abi.encodeWithSignature( "transfer(address,uint256)", msg.sender, _net ) ); return _net; } function balanceOf(address _gauge) public view returns (uint256) { return IERC20(_gauge).balanceOf(address(crvLocker)); } function withdrawAll(address _gauge, address _token) external returns (uint256) { require(strategies[msg.sender], "!strategy"); return withdraw(_gauge, _token, balanceOf(_gauge)); } function deposit(address _gauge, address _token) external { uint256 _balance = IERC20(_token).balanceOf(address(this)); IERC20(_token).safeTransfer(address(crvLocker), _balance); _balance = IERC20(_token).balanceOf(address(crvLocker)); crvLocker.execute( _token, 0, abi.encodeWithSignature("approve(address,uint256)", _gauge, 0) ); crvLocker.execute( _token, 0, abi.encodeWithSignature( "approve(address,uint256)", _gauge, _balance ) ); crvLocker.execute( _gauge, 0, abi.encodeWithSignature("deposit(uint256)", _balance) ); } function harvest(address _gauge) external { require(strategies[msg.sender], "!strategy"); uint256 _before = IERC20(crv).balanceOf(address(crvLocker)); crvLocker.execute( mintr, 0, abi.encodeWithSignature("mint(address)", _gauge) ); uint256 _after = IERC20(crv).balanceOf(address(crvLocker)); uint256 _balance = _after.sub(_before); crvLocker.execute( crv, 0, abi.encodeWithSignature( "transfer(address,uint256)", msg.sender, _balance ) ); } function claimRewards() external { require(strategies[msg.sender], "!strategy"); uint256 _before = IERC20(snx).balanceOf(address(crvLocker)); crvLocker.execute(scrvGauge, 0, abi.encodeWithSignature("claim_rewards()")); uint256 _after = IERC20(snx).balanceOf(address(crvLocker)); uint256 _balance = _after.sub(_before); crvLocker.execute( snx, 0, abi.encodeWithSignature( "transfer(address,uint256)", msg.sender, _balance ) ); } } abstract contract StrategyBase { using SafeERC20 for IERC20; using Address for address; using SafeMath for uint256; // Perfomance fees - start with 4.5% uint256 public performanceTreasuryFee = 450; uint256 public constant performanceTreasuryMax = 10000; uint256 public performanceDevFee = 0; uint256 public constant performanceDevMax = 10000; // Withdrawal fee 0.5% // - 0.325% to treasury // - 0.175% to dev fund uint256 public withdrawalTreasuryFee = 325; uint256 public constant withdrawalTreasuryMax = 100000; uint256 public withdrawalDevFundFee = 175; uint256 public constant withdrawalDevFundMax = 100000; // Tokens address public want; address public constant weth = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; // User accounts address public governance; address public controller; address public strategist; address public timelock; // Dex address public univ2Router2 = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D; constructor( address _want, address _governance, address _strategist, address _controller, address _timelock ) public { require(_want != address(0)); require(_governance != address(0)); require(_strategist != address(0)); require(_controller != address(0)); require(_timelock != address(0)); want = _want; governance = _governance; strategist = _strategist; controller = _controller; timelock = _timelock; } // **** Modifiers **** // modifier onlyBenevolent { require( msg.sender == tx.origin || msg.sender == governance || msg.sender == strategist ); _; } // **** Views **** // function balanceOfWant() public view returns (uint256) { return IERC20(want).balanceOf(address(this)); } function balanceOfPool() public virtual view returns (uint256); function balanceOf() public view returns (uint256) { return balanceOfWant().add(balanceOfPool()); } function getName() external virtual pure returns (string memory); // **** Setters **** // function setWithdrawalDevFundFee(uint256 _withdrawalDevFundFee) external { require(msg.sender == timelock, "!timelock"); withdrawalDevFundFee = _withdrawalDevFundFee; } function setWithdrawalTreasuryFee(uint256 _withdrawalTreasuryFee) external { require(msg.sender == timelock, "!timelock"); withdrawalTreasuryFee = _withdrawalTreasuryFee; } function setPerformanceDevFee(uint256 _performanceDevFee) external { require(msg.sender == timelock, "!timelock"); performanceDevFee = _performanceDevFee; } function setPerformanceTreasuryFee(uint256 _performanceTreasuryFee) external { require(msg.sender == timelock, "!timelock"); performanceTreasuryFee = _performanceTreasuryFee; } function setStrategist(address _strategist) external { require(msg.sender == governance, "!governance"); strategist = _strategist; } function setGovernance(address _governance) external { require(msg.sender == governance, "!governance"); governance = _governance; } function setTimelock(address _timelock) external { require(msg.sender == timelock, "!timelock"); timelock = _timelock; } function setController(address _controller) external { require(msg.sender == timelock, "!timelock"); controller = _controller; } // **** State mutations **** // function deposit() public virtual; // Controller only function for creating additional rewards from dust function withdraw(IERC20 _asset) external returns (uint256 balance) { require(msg.sender == controller, "!controller"); require(want != address(_asset), "want"); balance = _asset.balanceOf(address(this)); _asset.safeTransfer(controller, balance); } // Withdraw partial funds, normally used with a jar withdrawal function withdraw(uint256 _amount) external { require(msg.sender == controller, "!controller"); uint256 _balance = IERC20(want).balanceOf(address(this)); if (_balance < _amount) { _amount = _withdrawSome(_amount.sub(_balance)); _amount = _amount.add(_balance); } uint256 _feeDev = _amount.mul(withdrawalDevFundFee).div( withdrawalDevFundMax ); IERC20(want).safeTransfer(IController(controller).devfund(), _feeDev); uint256 _feeTreasury = _amount.mul(withdrawalTreasuryFee).div( withdrawalTreasuryMax ); IERC20(want).safeTransfer( IController(controller).treasury(), _feeTreasury ); address _jar = IController(controller).jars(address(want)); require(_jar != address(0), "!jar"); // additional protection so we don't burn the funds IERC20(want).safeTransfer(_jar, _amount.sub(_feeDev).sub(_feeTreasury)); } // Withdraw funds, used to swap between strategies function withdrawForSwap(uint256 _amount) external returns (uint256 balance) { require(msg.sender == controller, "!controller"); _withdrawSome(_amount); balance = IERC20(want).balanceOf(address(this)); address _jar = IController(controller).jars(address(want)); require(_jar != address(0), "!jar"); IERC20(want).safeTransfer(_jar, balance); } // Withdraw all funds, normally used when migrating strategies function withdrawAll() external returns (uint256 balance) { require(msg.sender == controller, "!controller"); _withdrawAll(); balance = IERC20(want).balanceOf(address(this)); address _jar = IController(controller).jars(address(want)); require(_jar != address(0), "!jar"); // additional protection so we don't burn the funds IERC20(want).safeTransfer(_jar, balance); } function _withdrawAll() internal { _withdrawSome(balanceOfPool()); } function _withdrawSome(uint256 _amount) internal virtual returns (uint256); function harvest() public virtual; // **** Emergency functions **** function execute(address _target, bytes memory _data) public payable returns (bytes memory response) { require(msg.sender == timelock, "!timelock"); require(_target != address(0), "!target"); // call contract in current context assembly { let succeeded := delegatecall( sub(gas(), 5000), _target, add(_data, 0x20), mload(_data), 0, 0 ) let size := returndatasize() response := mload(0x40) mstore( 0x40, add(response, and(add(add(size, 0x20), 0x1f), not(0x1f))) ) mstore(response, size) returndatacopy(add(response, 0x20), 0, size) switch iszero(succeeded) case 1 { // throw if delegatecall failed revert(add(response, 0x20), size) } } } // **** Internal functions **** function _swapUniswap( address _from, address _to, uint256 _amount ) internal { require(_to != address(0)); // Swap with uniswap IERC20(_from).safeApprove(univ2Router2, 0); IERC20(_from).safeApprove(univ2Router2, _amount); address[] memory path; if (_from == weth || _to == weth) { path = new address[](2); path[0] = _from; path[1] = _to; } else { path = new address[](3); path[0] = _from; path[1] = weth; path[2] = _to; } UniswapRouterV2(univ2Router2).swapExactTokensForTokens( _amount, 0, path, address(this), now.add(60) ); } function _distributePerformanceFeesAndDeposit() internal { uint256 _want = IERC20(want).balanceOf(address(this)); if (_want > 0) { // Treasury fees IERC20(want).safeTransfer( IController(controller).treasury(), _want.mul(performanceTreasuryFee).div(performanceTreasuryMax) ); // Performance fee IERC20(want).safeTransfer( IController(controller).devfund(), _want.mul(performanceDevFee).div(performanceDevMax) ); deposit(); } } } abstract contract StrategyCurveBase is StrategyBase { // curve dao address public gauge; address public curve; address public mintr = 0xd061D61a4d941c39E5453435B6345Dc261C2fcE0; // stablecoins address public dai = 0x6B175474E89094C44Da98b954EedeAC495271d0F; address public usdc = 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48; address public usdt = 0xdAC17F958D2ee523a2206206994597C13D831ec7; address public susd = 0x57Ab1ec28D129707052df4dF418D58a2D46d5f51; // bitcoins address public wbtc = 0x2260FAC5E5542a773Aa44fBCfeDf7C193bc2C599; address public renbtc = 0xEB4C2781e4ebA804CE9a9803C67d0893436bB27D; // rewards address public crv = 0xD533a949740bb3306d119CC777fa900bA034cd52; // How much CRV tokens to keep uint256 public keepCRV = 0; uint256 public keepCRVMax = 10000; constructor( address _curve, address _gauge, address _want, address _governance, address _strategist, address _controller, address _timelock ) public StrategyBase(_want, _governance, _strategist, _controller, _timelock) { curve = _curve; gauge = _gauge; } // **** Getters **** function balanceOfPool() public override view returns (uint256) { return ICurveGauge(gauge).balanceOf(address(this)); } function getHarvestable() external returns (uint256) { return ICurveGauge(gauge).claimable_tokens(address(this)); } function getMostPremium() public virtual view returns (address, uint256); // **** Setters **** function setKeepCRV(uint256 _keepCRV) external { require(msg.sender == governance, "!governance"); keepCRV = _keepCRV; } // **** State Mutation functions **** function deposit() public override { uint256 _want = IERC20(want).balanceOf(address(this)); if (_want > 0) { IERC20(want).safeApprove(gauge, 0); IERC20(want).safeApprove(gauge, _want); ICurveGauge(gauge).deposit(_want); } } function _withdrawSome(uint256 _amount) internal override returns (uint256) { ICurveGauge(gauge).withdraw(_amount); return _amount; } } abstract contract StrategyStakingRewardsBase is StrategyBase { address public rewards; // **** Getters **** constructor( address _rewards, address _want, address _governance, address _strategist, address _controller, address _timelock ) public StrategyBase(_want, _governance, _strategist, _controller, _timelock) { rewards = _rewards; } function balanceOfPool() public override view returns (uint256) { return IStakingRewards(rewards).balanceOf(address(this)); } function getHarvestable() external view returns (uint256) { return IStakingRewards(rewards).earned(address(this)); } // **** Setters **** function deposit() public override { uint256 _want = IERC20(want).balanceOf(address(this)); if (_want > 0) { IERC20(want).safeApprove(rewards, 0); IERC20(want).safeApprove(rewards, _want); IStakingRewards(rewards).stake(_want); } } function _withdrawSome(uint256 _amount) internal override returns (uint256) { IStakingRewards(rewards).withdraw(_amount); return _amount; } } abstract contract StrategyUniFarmBase is StrategyStakingRewardsBase { // Token addresses address public uni = 0x1f9840a85d5aF5bf1D1762F925BDADdC4201F984; // WETH/<token1> pair address public token1; // How much UNI tokens to keep? uint256 public keepUNI = 0; uint256 public constant keepUNIMax = 10000; constructor( address _token1, address _rewards, address _lp, address _governance, address _strategist, address _controller, address _timelock ) public StrategyStakingRewardsBase( _rewards, _lp, _governance, _strategist, _controller, _timelock ) { token1 = _token1; } // **** Setters **** function setKeepUNI(uint256 _keepUNI) external { require(msg.sender == timelock, "!timelock"); keepUNI = _keepUNI; } // **** State Mutations **** function harvest() public override onlyBenevolent { // Anyone can harvest it at any given time. // I understand the possibility of being frontrun // But ETH is a dark forest, and I wanna see how this plays out // i.e. will be be heavily frontrunned? // if so, a new strategy will be deployed. // Collects UNI tokens IStakingRewards(rewards).getReward(); uint256 _uni = IERC20(uni).balanceOf(address(this)); if (_uni > 0) { // 10% is locked up for future gov uint256 _keepUNI = _uni.mul(keepUNI).div(keepUNIMax); IERC20(uni).safeTransfer( IController(controller).treasury(), _keepUNI ); _swapUniswap(uni, weth, _uni.sub(_keepUNI)); } // Swap half WETH for DAI uint256 _weth = IERC20(weth).balanceOf(address(this)); if (_weth > 0) { _swapUniswap(weth, token1, _weth.div(2)); } // Adds in liquidity for ETH/DAI _weth = IERC20(weth).balanceOf(address(this)); uint256 _token1 = IERC20(token1).balanceOf(address(this)); if (_weth > 0 && _token1 > 0) { IERC20(weth).safeApprove(univ2Router2, 0); IERC20(weth).safeApprove(univ2Router2, _weth); IERC20(token1).safeApprove(univ2Router2, 0); IERC20(token1).safeApprove(univ2Router2, _token1); UniswapRouterV2(univ2Router2).addLiquidity( weth, token1, _weth, _token1, 0, 0, address(this), now + 60 ); // Donates DUST IERC20(weth).transfer( IController(controller).treasury(), IERC20(weth).balanceOf(address(this)) ); IERC20(token1).safeTransfer( IController(controller).treasury(), IERC20(token1).balanceOf(address(this)) ); } // We want to get back UNI LP tokens _distributePerformanceFeesAndDeposit(); } } contract StrategyUniEthDaiLpV4 is StrategyUniFarmBase { // Token addresses address public uni_rewards = 0xa1484C3aa22a66C62b77E0AE78E15258bd0cB711; address public uni_eth_dai_lp = 0xA478c2975Ab1Ea89e8196811F51A7B7Ade33eB11; address public dai = 0x6B175474E89094C44Da98b954EedeAC495271d0F; constructor( address _governance, address _strategist, address _controller, address _timelock ) public StrategyUniFarmBase( dai, uni_rewards, uni_eth_dai_lp, _governance, _strategist, _controller, _timelock ) {} // **** Views **** function getName() external override pure returns (string memory) { return "StrategyUniEthDaiLpV4"; } } contract StrategyUniEthUsdcLpV4 is StrategyUniFarmBase { // Token addresses address public uni_rewards = 0x7FBa4B8Dc5E7616e59622806932DBea72537A56b; address public uni_eth_usdc_lp = 0xB4e16d0168e52d35CaCD2c6185b44281Ec28C9Dc; address public usdc = 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48; constructor( address _governance, address _strategist, address _controller, address _timelock ) public StrategyUniFarmBase( usdc, uni_rewards, uni_eth_usdc_lp, _governance, _strategist, _controller, _timelock ) {} // **** Views **** function getName() external override pure returns (string memory) { return "StrategyUniEthUsdcLpV4"; } } contract StrategyUniEthUsdtLpV4 is StrategyUniFarmBase { // Token addresses address public uni_rewards = 0x6C3e4cb2E96B01F4b866965A91ed4437839A121a; address public uni_eth_usdt_lp = 0x0d4a11d5EEaaC28EC3F61d100daF4d40471f1852; address public usdt = 0xdAC17F958D2ee523a2206206994597C13D831ec7; constructor( address _governance, address _strategist, address _controller, address _timelock ) public StrategyUniFarmBase( usdt, uni_rewards, uni_eth_usdt_lp, _governance, _strategist, _controller, _timelock ) {} // **** Views **** function getName() external override pure returns (string memory) { return "StrategyUniEthUsdtLpV4"; } } contract StrategyUniEthWBtcLpV2 is StrategyUniFarmBase { // Token addresses address public uni_rewards = 0xCA35e32e7926b96A9988f61d510E038108d8068e; address public uni_eth_wbtc_lp = 0xBb2b8038a1640196FbE3e38816F3e67Cba72D940; address public wbtc = 0x2260FAC5E5542a773Aa44fBCfeDf7C193bc2C599; constructor( address _governance, address _strategist, address _controller, address _timelock ) public StrategyUniFarmBase( wbtc, uni_rewards, uni_eth_wbtc_lp, _governance, _strategist, _controller, _timelock ) {} // **** Views **** function getName() external override pure returns (string memory) { return "StrategyUniEthWBtcLpV2"; } } interface Hevm { function warp(uint256) external; function roll(uint x) external; function store(address c, bytes32 loc, bytes32 val) external; } contract MockERC20 is ERC20 { constructor(string memory name, string memory symbol) public ERC20(name, symbol) {} function mint(address recipient, uint256 amount) public { _mint(recipient, amount); } } contract DSTest { event eventListener (address target, bool exact); event logs (bytes); event log_bytes32 (bytes32); event log_named_address (bytes32 key, address val); event log_named_bytes32 (bytes32 key, bytes32 val); event log_named_decimal_int (bytes32 key, int val, uint decimals); event log_named_decimal_uint (bytes32 key, uint val, uint decimals); event log_named_int (bytes32 key, int val); event log_named_uint (bytes32 key, uint val); event log_named_string (bytes32 key, string val); bool public IS_TEST; bool public failed; constructor() internal { IS_TEST = true; } function fail() internal { failed = true; } function expectEventsExact(address target) internal { emit eventListener(target, true); } modifier logs_gas() { uint startGas = gasleft(); _; uint endGas = gasleft(); emit log_named_uint("gas", startGas - endGas); } function assertTrue(bool condition) internal { if (!condition) { emit log_bytes32("Assertion failed"); fail(); } } function assertEq(address a, address b) internal { if (a != b) { emit log_bytes32("Error: Wrong `address' value"); emit log_named_address(" Expected", b); emit log_named_address(" Actual", a); fail(); } } function assertEq32(bytes32 a, bytes32 b) internal { assertEq(a, b); } function assertEq(bytes32 a, bytes32 b) internal { if (a != b) { emit log_bytes32("Error: Wrong `bytes32' value"); emit log_named_bytes32(" Expected", b); emit log_named_bytes32(" Actual", a); fail(); } } function assertEqDecimal(int a, int b, uint decimals) internal { if (a != b) { emit log_bytes32("Error: Wrong fixed-point decimal"); emit log_named_decimal_int(" Expected", b, decimals); emit log_named_decimal_int(" Actual", a, decimals); fail(); } } function assertEqDecimal(uint a, uint b, uint decimals) internal { if (a != b) { emit log_bytes32("Error: Wrong fixed-point decimal"); emit log_named_decimal_uint(" Expected", b, decimals); emit log_named_decimal_uint(" Actual", a, decimals); fail(); } } function assertEq(int a, int b) internal { if (a != b) { emit log_bytes32("Error: Wrong `int' value"); emit log_named_int(" Expected", b); emit log_named_int(" Actual", a); fail(); } } function assertEq(uint a, uint b) internal { if (a != b) { emit log_bytes32("Error: Wrong `uint' value"); emit log_named_uint(" Expected", b); emit log_named_uint(" Actual", a); fail(); } } function assertEq(string memory a, string memory b) internal { if (keccak256(abi.encodePacked(a)) != keccak256(abi.encodePacked(b))) { emit log_bytes32("Error: Wrong `string' value"); emit log_named_string(" Expected", b); emit log_named_string(" Actual", a); fail(); } } function assertEq0(bytes memory a, bytes memory b) internal { bool ok = true; if (a.length == b.length) { for (uint i = 0; i < a.length; i++) { if (a[i] != b[i]) { ok = false; } } } else { ok = false; } if (!ok) { emit log_bytes32("Error: Wrong `bytes' value"); emit log_named_bytes32(" Expected", "[cannot show `bytes' value]"); emit log_named_bytes32(" Actual", "[cannot show `bytes' value]"); fail(); } } } contract User { function execute( address target, uint256 value, string memory signature, bytes memory data ) public payable returns (bytes memory) { bytes memory callData; if (bytes(signature).length == 0) { callData = data; } else { callData = abi.encodePacked( bytes4(keccak256(bytes(signature))), data ); } (bool success, bytes memory returnData) = target.call{value: value}( callData ); require(success, "!user-execute"); return returnData; } } contract StakngRewardsTest is DSTest { using SafeMath for uint256; MockERC20 stakingToken; MockERC20 rewardsToken; StakingRewards stakingRewards; address owner; Hevm hevm = Hevm(0x7109709ECfa91a80626fF3989D68f67F5b1DD12D); function setUp() public { owner = address(this); stakingToken = new MockERC20("staking", "STAKE"); rewardsToken = new MockERC20("rewards", "RWD"); stakingRewards = new StakingRewards( owner, address(rewardsToken), address(stakingToken) ); } function test_staking() public { uint256 stakeAmount = 100 ether; uint256 rewardAmount = 100 ether; stakingToken.mint(owner, stakeAmount); rewardsToken.mint(owner, rewardAmount); stakingToken.approve(address(stakingRewards), stakeAmount); stakingRewards.stake(stakeAmount); // // Make sure nothing is earned uint256 _before = stakingRewards.earned(owner); assertEq(_before, 0); // Fast forward hevm.warp(block.timestamp + 1 days); // No funds until we actually supply funds uint256 _after = stakingRewards.earned(owner); assertEq(_after, _before); // Give rewards rewardsToken.transfer(address(stakingRewards), rewardAmount); stakingRewards.notifyRewardAmount(rewardAmount); uint256 _rateBefore = stakingRewards.getRewardForDuration(); assertTrue(_rateBefore > 0); // Fast forward _before = stakingRewards.earned(owner); hevm.warp(block.timestamp + 1 days); _after = stakingRewards.earned(owner); assertTrue(_after > _before); assertTrue(_after > 0); // Add more rewards, rate should increase rewardsToken.mint(owner, rewardAmount); rewardsToken.transfer(address(stakingRewards), rewardAmount); stakingRewards.notifyRewardAmount(rewardAmount); uint256 _rateAfter = stakingRewards.getRewardForDuration(); assertTrue(_rateAfter > _rateBefore); // Warp to period finish hevm.warp(stakingRewards.periodFinish() + 1 days); // Retrieve tokens stakingRewards.getReward(); _before = stakingRewards.earned(owner); hevm.warp(block.timestamp + 1 days); _after = stakingRewards.earned(owner); // Earn 0 after period finished assertEq(_before, 0); assertEq(_after, 0); } } contract UniCurveConverter { using SafeMath for uint256; using SafeERC20 for IERC20; UniswapRouterV2 public router = UniswapRouterV2( 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D ); // Stablecoins address public constant dai = 0x6B175474E89094C44Da98b954EedeAC495271d0F; address public constant usdc = 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48; address public constant usdt = 0xdAC17F958D2ee523a2206206994597C13D831ec7; address public constant susd = 0x57Ab1ec28D129707052df4dF418D58a2D46d5f51; // Wrapped stablecoins address public constant scrv = 0xC25a3A3b969415c80451098fa907EC722572917F; // Weth address public constant weth = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; // susd v2 pool ICurveFi_4 public curve = ICurveFi_4( 0xA5407eAE9Ba41422680e2e00537571bcC53efBfD ); // UNI LP -> Curve LP // Assume th function convert(address _lp, uint256 _amount) public { // Get LP Tokens IERC20(_lp).safeTransferFrom(msg.sender, address(this), _amount); // Get Uniswap pair IUniswapV2Pair fromPair = IUniswapV2Pair(_lp); // Only for WETH/<TOKEN> pairs if (!(fromPair.token0() == weth || fromPair.token1() == weth)) { revert("!eth-from"); } // Remove liquidity IERC20(_lp).safeApprove(address(router), 0); IERC20(_lp).safeApprove(address(router), _amount); router.removeLiquidity( fromPair.token0(), fromPair.token1(), _amount, 0, 0, address(this), now + 60 ); // Most premium stablecoin (address premiumStablecoin, ) = getMostPremium(); // Convert weth -> most premium stablecoin address[] memory path = new address[](2); path[0] = weth; path[1] = premiumStablecoin; IERC20(weth).safeApprove(address(router), 0); IERC20(weth).safeApprove(address(router), uint256(-1)); router.swapExactTokensForTokens( IERC20(weth).balanceOf(address(this)), 0, path, address(this), now + 60 ); // Convert the other asset into stablecoin if its not a stablecoin address _from = fromPair.token0() != weth ? fromPair.token0() : fromPair.token1(); if (_from != dai && _from != usdc && _from != usdt && _from != susd) { path = new address[](3); path[0] = _from; path[1] = weth; path[2] = premiumStablecoin; IERC20(_from).safeApprove(address(router), 0); IERC20(_from).safeApprove(address(router), uint256(-1)); router.swapExactTokensForTokens( IERC20(_from).balanceOf(address(this)), 0, path, address(this), now + 60 ); } // Add liquidity to curve IERC20(dai).safeApprove(address(curve), 0); IERC20(dai).safeApprove(address(curve), uint256(-1)); IERC20(usdc).safeApprove(address(curve), 0); IERC20(usdc).safeApprove(address(curve), uint256(-1)); IERC20(usdt).safeApprove(address(curve), 0); IERC20(usdt).safeApprove(address(curve), uint256(-1)); IERC20(susd).safeApprove(address(curve), 0); IERC20(susd).safeApprove(address(curve), uint256(-1)); curve.add_liquidity( [ IERC20(dai).balanceOf(address(this)), IERC20(usdc).balanceOf(address(this)), IERC20(usdt).balanceOf(address(this)), IERC20(susd).balanceOf(address(this)) ], 0 ); // Sends token back to user IERC20(scrv).transfer( msg.sender, IERC20(scrv).balanceOf(address(this)) ); } function getMostPremium() public view returns (address, uint256) { uint256[] memory balances = new uint256[](4); balances[0] = ICurveFi_4(curve).balances(0); // DAI balances[1] = ICurveFi_4(curve).balances(1).mul(10**12); // USDC balances[2] = ICurveFi_4(curve).balances(2).mul(10**12); // USDT balances[3] = ICurveFi_4(curve).balances(3); // sUSD // DAI if ( balances[0] < balances[1] && balances[0] < balances[2] && balances[0] < balances[3] ) { return (dai, 0); } // USDC if ( balances[1] < balances[0] && balances[1] < balances[2] && balances[1] < balances[3] ) { return (usdc, 1); } // USDT if ( balances[2] < balances[0] && balances[2] < balances[1] && balances[2] < balances[3] ) { return (usdt, 2); } // SUSD if ( balances[3] < balances[0] && balances[3] < balances[1] && balances[3] < balances[2] ) { return (susd, 3); } // If they're somehow equal, we just want DAI return (dai, 0); } } interface IERC20 { function totalSupply() external view returns (uint256); function balanceOf(address account) external view returns (uint256); function transfer(address recipient, uint256 amount) external returns (bool); function allowance(address owner, address spender) external view returns (uint256); function approve(address spender, uint256 amount) external returns (bool); function transferFrom( address sender, address recipient, uint256 amount ) external returns (bool); event Transfer(address indexed from, address indexed to, uint256 value); event Approval( address indexed owner, address indexed spender, uint256 value ); } interface MasterChef { function userInfo(uint256, address) external view returns (uint256, uint256); } contract PickleVoteProxy { // ETH/PICKLE token IERC20 public constant votes = IERC20( 0xdc98556Ce24f007A5eF6dC1CE96322d65832A819 ); // Pickle's masterchef contract MasterChef public constant chef = MasterChef( 0xbD17B1ce622d73bD438b9E658acA5996dc394b0d ); // Pool 0 is the ETH/PICKLE pool uint256 public constant pool = uint256(0); // Using 9 decimals as we're square rooting the votes function decimals() external pure returns (uint8) { return uint8(9); } function name() external pure returns (string memory) { return "PICKLEs In The Citadel"; } function symbol() external pure returns (string memory) { return "PICKLE C"; } function totalSupply() external view returns (uint256) { return sqrt(votes.totalSupply()); } function balanceOf(address _voter) external view returns (uint256) { (uint256 _votes, ) = chef.userInfo(pool, _voter); return sqrt(_votes); } function sqrt(uint256 x) public pure returns (uint256 y) { uint256 z = (x + 1) / 2; y = x; while (z < y) { y = z; z = (x / z + z) / 2; } } constructor() public {} } contract MasterChef is Ownable { using SafeMath for uint256; using SafeERC20 for IERC20; // Info of each user. struct UserInfo { uint256 amount; // How many LP tokens the user has provided. uint256 rewardDebt; // Reward debt. See explanation below. // // We do some fancy math here. Basically, any point in time, the amount of PICKLEs // entitled to a user but is pending to be distributed is: // // pending reward = (user.amount * pool.accPicklePerShare) - user.rewardDebt // // Whenever a user deposits or withdraws LP tokens to a pool. Here's what happens: // 1. The pool's `accPicklePerShare` (and `lastRewardBlock`) gets updated. // 2. User receives the pending reward sent to his/her address. // 3. User's `amount` gets updated. // 4. User's `rewardDebt` gets updated. } // Info of each pool. struct PoolInfo { IERC20 lpToken; // Address of LP token contract. uint256 allocPoint; // How many allocation points assigned to this pool. PICKLEs to distribute per block. uint256 lastRewardBlock; // Last block number that PICKLEs distribution occurs. uint256 accPicklePerShare; // Accumulated PICKLEs per share, times 1e12. See below. } // The PICKLE TOKEN! PickleToken public pickle; // Dev fund (2%, initially) uint256 public devFundDivRate = 50; // Dev address. address public devaddr; // Block number when bonus PICKLE period ends. uint256 public bonusEndBlock; // PICKLE tokens created per block. uint256 public picklePerBlock; // Bonus muliplier for early pickle makers. uint256 public constant BONUS_MULTIPLIER = 10; // Info of each pool. PoolInfo[] public poolInfo; // Info of each user that stakes LP tokens. mapping(uint256 => mapping(address => UserInfo)) public userInfo; // Total allocation points. Must be the sum of all allocation points in all pools. uint256 public totalAllocPoint = 0; // The block number when PICKLE mining starts. uint256 public startBlock; // Events event Recovered(address token, uint256 amount); event Deposit(address indexed user, uint256 indexed pid, uint256 amount); event Withdraw(address indexed user, uint256 indexed pid, uint256 amount); event EmergencyWithdraw( address indexed user, uint256 indexed pid, uint256 amount ); constructor( PickleToken _pickle, address _devaddr, uint256 _picklePerBlock, uint256 _startBlock, uint256 _bonusEndBlock ) public { pickle = _pickle; devaddr = _devaddr; picklePerBlock = _picklePerBlock; bonusEndBlock = _bonusEndBlock; startBlock = _startBlock; } function poolLength() external view returns (uint256) { return poolInfo.length; } // Add a new lp to the pool. Can only be called by the owner. // XXX DO NOT add the same LP token more than once. Rewards will be messed up if you do. function add( uint256 _allocPoint, IERC20 _lpToken, bool _withUpdate ) public onlyOwner { if (_withUpdate) { massUpdatePools(); } uint256 lastRewardBlock = block.number > startBlock ? block.number : startBlock; totalAllocPoint = totalAllocPoint.add(_allocPoint); poolInfo.push( PoolInfo({ lpToken: _lpToken, allocPoint: _allocPoint, lastRewardBlock: lastRewardBlock, accPicklePerShare: 0 }) ); } // Update the given pool's PICKLE allocation point. Can only be called by the owner. function set( uint256 _pid, uint256 _allocPoint, bool _withUpdate ) public onlyOwner { if (_withUpdate) { massUpdatePools(); } totalAllocPoint = totalAllocPoint.sub(poolInfo[_pid].allocPoint).add( _allocPoint ); poolInfo[_pid].allocPoint = _allocPoint; } // Return reward multiplier over the given _from to _to block. function getMultiplier(uint256 _from, uint256 _to) public view returns (uint256) { if (_to <= bonusEndBlock) { return _to.sub(_from).mul(BONUS_MULTIPLIER); } else if (_from >= bonusEndBlock) { return _to.sub(_from); } else { return bonusEndBlock.sub(_from).mul(BONUS_MULTIPLIER).add( _to.sub(bonusEndBlock) ); } } // View function to see pending PICKLEs on frontend. function pendingPickle(uint256 _pid, address _user) external view returns (uint256) { PoolInfo storage pool = poolInfo[_pid]; UserInfo storage user = userInfo[_pid][_user]; uint256 accPicklePerShare = pool.accPicklePerShare; uint256 lpSupply = pool.lpToken.balanceOf(address(this)); if (block.number > pool.lastRewardBlock && lpSupply != 0) { uint256 multiplier = getMultiplier( pool.lastRewardBlock, block.number ); uint256 pickleReward = multiplier .mul(picklePerBlock) .mul(pool.allocPoint) .div(totalAllocPoint); accPicklePerShare = accPicklePerShare.add( pickleReward.mul(1e12).div(lpSupply) ); } return user.amount.mul(accPicklePerShare).div(1e12).sub(user.rewardDebt); } // Update reward vairables for all pools. Be careful of gas spending! function massUpdatePools() public { uint256 length = poolInfo.length; for (uint256 pid = 0; pid < length; ++pid) { updatePool(pid); } } // Update reward variables of the given pool to be up-to-date. function updatePool(uint256 _pid) public { PoolInfo storage pool = poolInfo[_pid]; if (block.number <= pool.lastRewardBlock) { return; } uint256 lpSupply = pool.lpToken.balanceOf(address(this)); if (lpSupply == 0) { pool.lastRewardBlock = block.number; return; } uint256 multiplier = getMultiplier(pool.lastRewardBlock, block.number); uint256 pickleReward = multiplier .mul(picklePerBlock) .mul(pool.allocPoint) .div(totalAllocPoint); pickle.mint(devaddr, pickleReward.div(devFundDivRate)); pickle.mint(address(this), pickleReward); pool.accPicklePerShare = pool.accPicklePerShare.add( pickleReward.mul(1e12).div(lpSupply) ); pool.lastRewardBlock = block.number; } // Deposit LP tokens to MasterChef for PICKLE allocation. function deposit(uint256 _pid, uint256 _amount) public { PoolInfo storage pool = poolInfo[_pid]; UserInfo storage user = userInfo[_pid][msg.sender]; updatePool(_pid); if (user.amount > 0) { uint256 pending = user .amount .mul(pool.accPicklePerShare) .div(1e12) .sub(user.rewardDebt); safePickleTransfer(msg.sender, pending); } pool.lpToken.safeTransferFrom( address(msg.sender), address(this), _amount ); user.amount = user.amount.add(_amount); user.rewardDebt = user.amount.mul(pool.accPicklePerShare).div(1e12); emit Deposit(msg.sender, _pid, _amount); } // Withdraw LP tokens from MasterChef. function withdraw(uint256 _pid, uint256 _amount) public { PoolInfo storage pool = poolInfo[_pid]; UserInfo storage user = userInfo[_pid][msg.sender]; require(user.amount >= _amount, "withdraw: not good"); updatePool(_pid); uint256 pending = user.amount.mul(pool.accPicklePerShare).div(1e12).sub( user.rewardDebt ); safePickleTransfer(msg.sender, pending); user.amount = user.amount.sub(_amount); user.rewardDebt = user.amount.mul(pool.accPicklePerShare).div(1e12); pool.lpToken.safeTransfer(address(msg.sender), _amount); emit Withdraw(msg.sender, _pid, _amount); } // Withdraw without caring about rewards. EMERGENCY ONLY. function emergencyWithdraw(uint256 _pid) public { PoolInfo storage pool = poolInfo[_pid]; UserInfo storage user = userInfo[_pid][msg.sender]; pool.lpToken.safeTransfer(address(msg.sender), user.amount); emit EmergencyWithdraw(msg.sender, _pid, user.amount); user.amount = 0; user.rewardDebt = 0; } // Safe pickle transfer function, just in case if rounding error causes pool to not have enough PICKLEs. function safePickleTransfer(address _to, uint256 _amount) internal { uint256 pickleBal = pickle.balanceOf(address(this)); if (_amount > pickleBal) { pickle.transfer(_to, pickleBal); } else { pickle.transfer(_to, _amount); } } // Update dev address by the previous dev. function dev(address _devaddr) public { require(msg.sender == devaddr, "dev: wut?"); devaddr = _devaddr; } // **** Additional functions separate from the original masterchef contract **** function setPicklePerBlock(uint256 _picklePerBlock) public onlyOwner { require(_picklePerBlock > 0, "!picklePerBlock-0"); picklePerBlock = _picklePerBlock; } function setBonusEndBlock(uint256 _bonusEndBlock) public onlyOwner { bonusEndBlock = _bonusEndBlock; } function setDevFundDivRate(uint256 _devFundDivRate) public onlyOwner { require(_devFundDivRate > 0, "!devFundDivRate-0"); devFundDivRate = _devFundDivRate; } } contract PickleToken is ERC20("PickleToken", "PICKLE"), Ownable { /// @notice Creates `_amount` token to `_to`. Must only be called by the owner (MasterChef). function mint(address _to, uint256 _amount) public onlyOwner { _mint(_to, _amount); } } interface IJar is IERC20 { function token() external view returns (address); function claimInsurance() external; // NOTE: Only yDelegatedVault implements this function getRatio() external view returns (uint256); function deposit(uint256) external; function withdraw(uint256) external; function earn() external; function decimals() external view returns (uint8); } contract StrategyCmpdDaiV2 is StrategyBase, Exponential { address public constant comptroller = 0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B; address public constant lens = 0xd513d22422a3062Bd342Ae374b4b9c20E0a9a074; address public constant dai = 0x6B175474E89094C44Da98b954EedeAC495271d0F; address public constant comp = 0xc00e94Cb662C3520282E6f5717214004A7f26888; address public constant cdai = 0x5d3a536E4D6DbD6114cc1Ead35777bAB948E3643; address public constant cether = 0x4Ddc2D193948926D02f9B1fE9e1daa0718270ED5; // Require a 0.1 buffer between // market collateral factor and strategy's collateral factor // when leveraging uint256 colFactorLeverageBuffer = 100; uint256 colFactorLeverageBufferMax = 1000; // Allow a 0.05 buffer // between market collateral factor and strategy's collateral factor // until we have to deleverage // This is so we can hit max leverage and keep accruing interest uint256 colFactorSyncBuffer = 50; uint256 colFactorSyncBufferMax = 1000; // Keeper bots // Maintain leverage within buffer mapping(address => bool) keepers; constructor( address _governance, address _strategist, address _controller, address _timelock ) public StrategyBase(dai, _governance, _strategist, _controller, _timelock) { // Enter cDAI Market address[] memory ctokens = new address[](1); ctokens[0] = cdai; IComptroller(comptroller).enterMarkets(ctokens); } // **** Modifiers **** // modifier onlyKeepers { require( keepers[msg.sender] || msg.sender == address(this) || msg.sender == strategist || msg.sender == governance, "!keepers" ); _; } // **** Views **** // function getName() external override pure returns (string memory) { return "StrategyCmpdDaiV2"; } function getSuppliedView() public view returns (uint256) { (, uint256 cTokenBal, , uint256 exchangeRate) = ICToken(cdai) .getAccountSnapshot(address(this)); (, uint256 bal) = mulScalarTruncate( Exp({mantissa: exchangeRate}), cTokenBal ); return bal; } function getBorrowedView() public view returns (uint256) { return ICToken(cdai).borrowBalanceStored(address(this)); } function balanceOfPool() public override view returns (uint256) { uint256 supplied = getSuppliedView(); uint256 borrowed = getBorrowedView(); return supplied.sub(borrowed); } // Given an unleveraged supply balance, return the target // leveraged supply balance which is still within the safety buffer function getLeveragedSupplyTarget(uint256 supplyBalance) public view returns (uint256) { uint256 leverage = getMaxLeverage(); return supplyBalance.mul(leverage).div(1e18); } function getSafeLeverageColFactor() public view returns (uint256) { uint256 colFactor = getMarketColFactor(); // Collateral factor within the buffer uint256 safeColFactor = colFactor.sub( colFactorLeverageBuffer.mul(1e18).div(colFactorLeverageBufferMax) ); return safeColFactor; } function getSafeSyncColFactor() public view returns (uint256) { uint256 colFactor = getMarketColFactor(); // Collateral factor within the buffer uint256 safeColFactor = colFactor.sub( colFactorSyncBuffer.mul(1e18).div(colFactorSyncBufferMax) ); return safeColFactor; } function getMarketColFactor() public view returns (uint256) { (, uint256 colFactor) = IComptroller(comptroller).markets(cdai); return colFactor; } // Max leverage we can go up to, w.r.t safe buffer function getMaxLeverage() public view returns (uint256) { uint256 safeLeverageColFactor = getSafeLeverageColFactor(); // Infinite geometric series uint256 leverage = uint256(1e36).div(1e18 - safeLeverageColFactor); return leverage; } // **** Pseudo-view functions (use `callStatic` on these) **** // /* The reason why these exists is because of the nature of the interest accruing supply + borrow balance. The "view" methods are technically snapshots and don't represent the real value. As such there are pseudo view methods where you can retrieve the results by calling `callStatic`. */ function getCompAccrued() public returns (uint256) { (, , , uint256 accrued) = ICompoundLens(lens).getCompBalanceMetadataExt( comp, comptroller, address(this) ); return accrued; } function getColFactor() public returns (uint256) { uint256 supplied = getSupplied(); uint256 borrowed = getBorrowed(); return borrowed.mul(1e18).div(supplied); } function getSuppliedUnleveraged() public returns (uint256) { uint256 supplied = getSupplied(); uint256 borrowed = getBorrowed(); return supplied.sub(borrowed); } function getSupplied() public returns (uint256) { return ICToken(cdai).balanceOfUnderlying(address(this)); } function getBorrowed() public returns (uint256) { return ICToken(cdai).borrowBalanceCurrent(address(this)); } function getBorrowable() public returns (uint256) { uint256 supplied = getSupplied(); uint256 borrowed = getBorrowed(); (, uint256 colFactor) = IComptroller(comptroller).markets(cdai); // 99.99% just in case some dust accumulates return supplied.mul(colFactor).div(1e18).sub(borrowed).mul(9999).div( 10000 ); } function getCurrentLeverage() public returns (uint256) { uint256 supplied = getSupplied(); uint256 borrowed = getBorrowed(); return supplied.mul(1e18).div(supplied.sub(borrowed)); } // **** Setters **** // function addKeeper(address _keeper) public { require( msg.sender == governance || msg.sender == strategist, "!governance" ); keepers[_keeper] = true; } function removeKeeper(address _keeper) public { require( msg.sender == governance || msg.sender == strategist, "!governance" ); keepers[_keeper] = false; } function setColFactorLeverageBuffer(uint256 _colFactorLeverageBuffer) public { require( msg.sender == governance || msg.sender == strategist, "!governance" ); colFactorLeverageBuffer = _colFactorLeverageBuffer; } function setColFactorSyncBuffer(uint256 _colFactorSyncBuffer) public { require( msg.sender == governance || msg.sender == strategist, "!governance" ); colFactorSyncBuffer = _colFactorSyncBuffer; } // **** State mutations **** // // Do a `callStatic` on this. // If it returns true then run it for realz. (i.e. eth_signedTx, not eth_call) function sync() public returns (bool) { uint256 colFactor = getColFactor(); uint256 safeSyncColFactor = getSafeSyncColFactor(); // If we're not safe if (colFactor > safeSyncColFactor) { uint256 unleveragedSupply = getSuppliedUnleveraged(); uint256 idealSupply = getLeveragedSupplyTarget(unleveragedSupply); deleverageUntil(idealSupply); return true; } return false; } function leverageToMax() public { uint256 unleveragedSupply = getSuppliedUnleveraged(); uint256 idealSupply = getLeveragedSupplyTarget(unleveragedSupply); leverageUntil(idealSupply); } // Leverages until we're supplying <x> amount // 1. Redeem <x> DAI // 2. Repay <x> DAI function leverageUntil(uint256 _supplyAmount) public onlyKeepers { // 1. Borrow out <X> DAI // 2. Supply <X> DAI uint256 leverage = getMaxLeverage(); uint256 unleveragedSupply = getSuppliedUnleveraged(); require( _supplyAmount >= unleveragedSupply && _supplyAmount <= unleveragedSupply.mul(leverage).div(1e18), "!leverage" ); // Since we're only leveraging one asset // Supplied = borrowed uint256 _borrowAndSupply; uint256 supplied = getSupplied(); while (supplied < _supplyAmount) { _borrowAndSupply = getBorrowable(); if (supplied.add(_borrowAndSupply) > _supplyAmount) { _borrowAndSupply = _supplyAmount.sub(supplied); } ICToken(cdai).borrow(_borrowAndSupply); deposit(); supplied = supplied.add(_borrowAndSupply); } } function deleverageToMin() public { uint256 unleveragedSupply = getSuppliedUnleveraged(); deleverageUntil(unleveragedSupply); } // Deleverages until we're supplying <x> amount // 1. Redeem <x> DAI // 2. Repay <x> DAI function deleverageUntil(uint256 _supplyAmount) public onlyKeepers { uint256 unleveragedSupply = getSuppliedUnleveraged(); uint256 supplied = getSupplied(); require( _supplyAmount >= unleveragedSupply && _supplyAmount <= supplied, "!deleverage" ); // Since we're only leveraging on 1 asset // redeemable = borrowable uint256 _redeemAndRepay = getBorrowable(); do { if (supplied.sub(_redeemAndRepay) < _supplyAmount) { _redeemAndRepay = supplied.sub(_supplyAmount); } require( ICToken(cdai).redeemUnderlying(_redeemAndRepay) == 0, "!redeem" ); IERC20(dai).safeApprove(cdai, 0); IERC20(dai).safeApprove(cdai, _redeemAndRepay); require(ICToken(cdai).repayBorrow(_redeemAndRepay) == 0, "!repay"); supplied = supplied.sub(_redeemAndRepay); } while (supplied > _supplyAmount); } function harvest() public override onlyBenevolent { address[] memory ctokens = new address[](1); ctokens[0] = cdai; IComptroller(comptroller).claimComp(address(this), ctokens); uint256 _comp = IERC20(comp).balanceOf(address(this)); if (_comp > 0) { _swapUniswap(comp, want, _comp); } _distributePerformanceFeesAndDeposit(); } function deposit() public override { uint256 _want = IERC20(want).balanceOf(address(this)); if (_want > 0) { IERC20(want).safeApprove(cdai, 0); IERC20(want).safeApprove(cdai, _want); require(ICToken(cdai).mint(_want) == 0, "!deposit"); } } function _withdrawSome(uint256 _amount) internal override returns (uint256) { uint256 _want = balanceOfWant(); if (_want < _amount) { uint256 _redeem = _amount.sub(_want); // Make sure market can cover liquidity require(ICToken(cdai).getCash() >= _redeem, "!cash-liquidity"); // How much borrowed amount do we need to free? uint256 borrowed = getBorrowed(); uint256 supplied = getSupplied(); uint256 curLeverage = getCurrentLeverage(); uint256 borrowedToBeFree = _redeem.mul(curLeverage).div(1e18); // If the amount we need to free is > borrowed // Just free up all the borrowed amount if (borrowedToBeFree > borrowed) { this.deleverageToMin(); } else { // Otherwise just keep freeing up borrowed amounts until // we hit a safe number to redeem our underlying this.deleverageUntil(supplied.sub(borrowedToBeFree)); } // Redeems underlying require(ICToken(cdai).redeemUnderlying(_redeem) == 0, "!redeem"); } return _amount; } } contract StrategyCurve3CRVv2 is StrategyCurveBase { // Curve stuff address public three_pool = 0xbEbc44782C7dB0a1A60Cb6fe97d0b483032FF1C7; address public three_gauge = 0xbFcF63294aD7105dEa65aA58F8AE5BE2D9d0952A; address public three_crv = 0x6c3F90f043a72FA612cbac8115EE7e52BDe6E490; constructor( address _governance, address _strategist, address _controller, address _timelock ) public StrategyCurveBase( three_pool, three_gauge, three_crv, _governance, _strategist, _controller, _timelock ) {} // **** Views **** function getMostPremium() public override view returns (address, uint256) { uint256[] memory balances = new uint256[](3); balances[0] = ICurveFi_3(curve).balances(0); // DAI balances[1] = ICurveFi_3(curve).balances(1).mul(10**12); // USDC balances[2] = ICurveFi_3(curve).balances(2).mul(10**12); // USDT // DAI if ( balances[0] < balances[1] && balances[0] < balances[2] ) { return (dai, 0); } // USDC if ( balances[1] < balances[0] && balances[1] < balances[2] ) { return (usdc, 1); } // USDT if ( balances[2] < balances[0] && balances[2] < balances[1] ) { return (usdt, 2); } // If they're somehow equal, we just want DAI return (dai, 0); } function getName() external override pure returns (string memory) { return "StrategyCurve3CRVv2"; } // **** State Mutations **** function harvest() public onlyBenevolent override { // Anyone can harvest it at any given time. // I understand the possibility of being frontrun // But ETH is a dark forest, and I wanna see how this plays out // i.e. will be be heavily frontrunned? // if so, a new strategy will be deployed. // stablecoin we want to convert to (address to, uint256 toIndex) = getMostPremium(); // Collects crv tokens // Don't bother voting in v1 ICurveMintr(mintr).mint(gauge); uint256 _crv = IERC20(crv).balanceOf(address(this)); if (_crv > 0) { // x% is sent back to the rewards holder // to be used to lock up in as veCRV in a future date uint256 _keepCRV = _crv.mul(keepCRV).div(keepCRVMax); if (_keepCRV > 0) { IERC20(crv).safeTransfer( IController(controller).treasury(), _keepCRV ); } _crv = _crv.sub(_keepCRV); _swapUniswap(crv, to, _crv); } // Adds liquidity to curve.fi's pool // to get back want (scrv) uint256 _to = IERC20(to).balanceOf(address(this)); if (_to > 0) { IERC20(to).safeApprove(curve, 0); IERC20(to).safeApprove(curve, _to); uint256[3] memory liquidity; liquidity[toIndex] = _to; ICurveFi_3(curve).add_liquidity(liquidity, 0); } _distributePerformanceFeesAndDeposit(); } } contract StrategyCurveRenCRVv2 is StrategyCurveBase { // https://www.curve.fi/ren // Curve stuff address public ren_pool = 0x93054188d876f558f4a66B2EF1d97d16eDf0895B; address public ren_gauge = 0xB1F2cdeC61db658F091671F5f199635aEF202CAC; address public ren_crv = 0x49849C98ae39Fff122806C06791Fa73784FB3675; constructor( address _governance, address _strategist, address _controller, address _timelock ) public StrategyCurveBase( ren_pool, ren_gauge, ren_crv, _governance, _strategist, _controller, _timelock ) {} // **** Views **** function getMostPremium() public override view returns (address, uint256) { // Both 8 decimals, so doesn't matter uint256[] memory balances = new uint256[](3); balances[0] = ICurveFi_2(curve).balances(0); // RENBTC balances[1] = ICurveFi_2(curve).balances(1); // WBTC // renbtc if (balances[0] < balances[1]) { return (renbtc, 0); } // WBTC if (balances[1] < balances[0]) { return (wbtc, 1); } // If they're somehow equal, we just want RENBTC return (renbtc, 0); } function getName() external override pure returns (string memory) { return "StrategyCurveRenCRVv2"; } // **** State Mutations **** function harvest() public override onlyBenevolent { // Anyone can harvest it at any given time. // I understand the possibility of being frontrun // But ETH is a dark forest, and I wanna see how this plays out // i.e. will be be heavily frontrunned? // if so, a new strategy will be deployed. // stablecoin we want to convert to (address to, uint256 toIndex) = getMostPremium(); // Collects crv tokens // Don't bother voting in v1 ICurveMintr(mintr).mint(gauge); uint256 _crv = IERC20(crv).balanceOf(address(this)); if (_crv > 0) { // x% is sent back to the rewards holder // to be used to lock up in as veCRV in a future date uint256 _keepCRV = _crv.mul(keepCRV).div(keepCRVMax); if (_keepCRV > 0) { IERC20(crv).safeTransfer( IController(controller).treasury(), _keepCRV ); } _crv = _crv.sub(_keepCRV); _swapUniswap(crv, to, _crv); } // Adds liquidity to curve.fi's pool // to get back want (scrv) uint256 _to = IERC20(to).balanceOf(address(this)); if (_to > 0) { IERC20(to).safeApprove(curve, 0); IERC20(to).safeApprove(curve, _to); uint256[2] memory liquidity; liquidity[toIndex] = _to; ICurveFi_2(curve).add_liquidity(liquidity, 0); } _distributePerformanceFeesAndDeposit(); } } contract StrategyCurveSCRVv3_2 is StrategyCurveBase { // Curve stuff address public susdv2_pool = 0xA5407eAE9Ba41422680e2e00537571bcC53efBfD; address public susdv2_gauge = 0xA90996896660DEcC6E997655E065b23788857849; address public scrv = 0xC25a3A3b969415c80451098fa907EC722572917F; // Harvesting address public snx = 0xC011a73ee8576Fb46F5E1c5751cA3B9Fe0af2a6F; constructor( address _governance, address _strategist, address _controller, address _timelock ) public StrategyCurveBase( susdv2_pool, susdv2_gauge, scrv, _governance, _strategist, _controller, _timelock ) {} // **** Views **** function getMostPremium() public override view returns (address, uint256) { uint256[] memory balances = new uint256[](4); balances[0] = ICurveFi_4(curve).balances(0); // DAI balances[1] = ICurveFi_4(curve).balances(1).mul(10**12); // USDC balances[2] = ICurveFi_4(curve).balances(2).mul(10**12); // USDT balances[3] = ICurveFi_4(curve).balances(3); // sUSD // DAI if ( balances[0] < balances[1] && balances[0] < balances[2] && balances[0] < balances[3] ) { return (dai, 0); } // USDC if ( balances[1] < balances[0] && balances[1] < balances[2] && balances[1] < balances[3] ) { return (usdc, 1); } // USDT if ( balances[2] < balances[0] && balances[2] < balances[1] && balances[2] < balances[3] ) { return (usdt, 2); } // SUSD if ( balances[3] < balances[0] && balances[3] < balances[1] && balances[3] < balances[2] ) { return (susd, 3); } // If they're somehow equal, we just want DAI return (dai, 0); } function getName() external override pure returns (string memory) { return "StrategyCurveSCRVv3_2"; } // **** State Mutations **** function harvest() public onlyBenevolent override { // Anyone can harvest it at any given time. // I understand the possibility of being frontrun // But ETH is a dark forest, and I wanna see how this plays out // i.e. will be be heavily frontrunned? // if so, a new strategy will be deployed. // stablecoin we want to convert to (address to, uint256 toIndex) = getMostPremium(); // Collects crv tokens // Don't bother voting in v1 ICurveMintr(mintr).mint(gauge); uint256 _crv = IERC20(crv).balanceOf(address(this)); if (_crv > 0) { // x% is sent back to the rewards holder // to be used to lock up in as veCRV in a future date uint256 _keepCRV = _crv.mul(keepCRV).div(keepCRVMax); if (_keepCRV > 0) { IERC20(crv).safeTransfer( IController(controller).treasury(), _keepCRV ); } _crv = _crv.sub(_keepCRV); _swapUniswap(crv, to, _crv); } // Collects SNX tokens ICurveGauge(gauge).claim_rewards(address(this)); uint256 _snx = IERC20(snx).balanceOf(address(this)); if (_snx > 0) { _swapUniswap(snx, to, _snx); } // Adds liquidity to curve.fi's susd pool // to get back want (scrv) uint256 _to = IERC20(to).balanceOf(address(this)); if (_to > 0) { IERC20(to).safeApprove(curve, 0); IERC20(to).safeApprove(curve, _to); uint256[4] memory liquidity; liquidity[toIndex] = _to; ICurveFi_4(curve).add_liquidity(liquidity, 0); } // We want to get back sCRV _distributePerformanceFeesAndDeposit(); } } contract StrategyCurveSCRVv4_1 is StrategyBase { // Curve address public scrv = 0xC25a3A3b969415c80451098fa907EC722572917F; address public susdv2_gauge = 0xA90996896660DEcC6E997655E065b23788857849; address public susdv2_pool = 0xA5407eAE9Ba41422680e2e00537571bcC53efBfD; address public escrow = 0x5f3b5DfEb7B28CDbD7FAba78963EE202a494e2A2; // curve dao address public gauge; address public curve; address public mintr = 0xd061D61a4d941c39E5453435B6345Dc261C2fcE0; // tokens we're farming address public constant crv = 0xD533a949740bb3306d119CC777fa900bA034cd52; address public constant snx = 0xC011a73ee8576Fb46F5E1c5751cA3B9Fe0af2a6F; // stablecoins address public dai = 0x6B175474E89094C44Da98b954EedeAC495271d0F; address public usdc = 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48; address public usdt = 0xdAC17F958D2ee523a2206206994597C13D831ec7; address public susd = 0x57Ab1ec28D129707052df4dF418D58a2D46d5f51; // How much CRV tokens to keep uint256 public keepCRV = 500; uint256 public keepCRVMax = 10000; // crv-locker and voter address public scrvVoter; address public crvLocker; constructor( address _scrvVoter, address _crvLocker, address _governance, address _strategist, address _controller, address _timelock ) public StrategyBase(scrv, _governance, _strategist, _controller, _timelock) { curve = susdv2_pool; gauge = susdv2_gauge; scrvVoter = _scrvVoter; crvLocker = _crvLocker; } // **** Getters **** function balanceOfPool() public override view returns (uint256) { return SCRVVoter(scrvVoter).balanceOf(gauge); } function getName() external override pure returns (string memory) { return "StrategyCurveSCRVv4_1"; } function getHarvestable() external returns (uint256) { return ICurveGauge(gauge).claimable_tokens(crvLocker); } function getMostPremium() public view returns (address, uint8) { uint256[] memory balances = new uint256[](4); balances[0] = ICurveFi_4(curve).balances(0); // DAI balances[1] = ICurveFi_4(curve).balances(1).mul(10**12); // USDC balances[2] = ICurveFi_4(curve).balances(2).mul(10**12); // USDT balances[3] = ICurveFi_4(curve).balances(3); // sUSD // DAI if ( balances[0] < balances[1] && balances[0] < balances[2] && balances[0] < balances[3] ) { return (dai, 0); } // USDC if ( balances[1] < balances[0] && balances[1] < balances[2] && balances[1] < balances[3] ) { return (usdc, 1); } // USDT if ( balances[2] < balances[0] && balances[2] < balances[1] && balances[2] < balances[3] ) { return (usdt, 2); } // SUSD if ( balances[3] < balances[0] && balances[3] < balances[1] && balances[3] < balances[2] ) { return (susd, 3); } // If they're somehow equal, we just want DAI return (dai, 0); } // **** Setters **** function setKeepCRV(uint256 _keepCRV) external { require(msg.sender == governance, "!governance"); keepCRV = _keepCRV; } // **** State Mutations **** function deposit() public override { uint256 _want = IERC20(want).balanceOf(address(this)); if (_want > 0) { IERC20(want).safeTransfer(scrvVoter, _want); SCRVVoter(scrvVoter).deposit(gauge, want); } } function _withdrawSome(uint256 _amount) internal override returns (uint256) { return SCRVVoter(scrvVoter).withdraw(gauge, want, _amount); } function harvest() public override onlyBenevolent { // Anyone can harvest it at any given time. // I understand the possibility of being frontrun / sandwiched // But ETH is a dark forest, and I wanna see how this plays out // i.e. will be be heavily frontrunned/sandwiched? // if so, a new strategy will be deployed. // stablecoin we want to convert to (address to, uint256 toIndex) = getMostPremium(); // Collects crv tokens // Don't bother voting in v1 SCRVVoter(scrvVoter).harvest(gauge); uint256 _crv = IERC20(crv).balanceOf(address(this)); if (_crv > 0) { // How much CRV to keep to restake? uint256 _keepCRV = _crv.mul(keepCRV).div(keepCRVMax); IERC20(crv).safeTransfer(address(crvLocker), _keepCRV); // How much CRV to swap? _crv = _crv.sub(_keepCRV); _swapUniswap(crv, to, _crv); } // Collects SNX tokens SCRVVoter(scrvVoter).claimRewards(); uint256 _snx = IERC20(snx).balanceOf(address(this)); if (_snx > 0) { _swapUniswap(snx, to, _snx); } // Adds liquidity to curve.fi's susd pool // to get back want (scrv) uint256 _to = IERC20(to).balanceOf(address(this)); if (_to > 0) { IERC20(to).safeApprove(curve, 0); IERC20(to).safeApprove(curve, _to); uint256[4] memory liquidity; liquidity[toIndex] = _to; ICurveFi_4(curve).add_liquidity(liquidity, 0); } // We want to get back sCRV _distributePerformanceFeesAndDeposit(); } } contract DSTestApprox is DSTest { function assertEqApprox(uint256 a, uint256 b) internal { if (a == 0 && b == 0) { return; } // +/- 5% uint256 bMax = (b * 105) / 100; uint256 bMin = (b * 95) / 100; if (!(a > bMin && a < bMax)) { emit log_bytes32("Error: Wrong `a-uint` value!"); emit log_named_uint(" Expected", b); emit log_named_uint(" Actual", a); fail(); } } function assertEqVerbose(bool a, bytes memory b) internal { if (!a) { emit log_bytes32("Error: assertion error!"); emit logs(b); fail(); } } } contract DSTestDefiBase is DSTestApprox { using SafeERC20 for IERC20; using SafeMath for uint256; address pickle = 0x429881672B9AE42b8EbA0E26cD9C73711b891Ca5; address burn = 0x000000000000000000000000000000000000dEaD; address susdv2_deposit = 0xFCBa3E75865d2d561BE8D220616520c171F12851; address susdv2_pool = 0xA5407eAE9Ba41422680e2e00537571bcC53efBfD; address three_pool = 0xbEbc44782C7dB0a1A60Cb6fe97d0b483032FF1C7; address ren_pool = 0x93054188d876f558f4a66B2EF1d97d16eDf0895B; address scrv = 0xC25a3A3b969415c80451098fa907EC722572917F; address three_crv = 0x6c3F90f043a72FA612cbac8115EE7e52BDe6E490; address ren_crv = 0x49849C98ae39Fff122806C06791Fa73784FB3675; address eth = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address weth = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address crv = 0xD533a949740bb3306d119CC777fa900bA034cd52; address snx = 0xC011a73ee8576Fb46F5E1c5751cA3B9Fe0af2a6F; address dai = 0x6B175474E89094C44Da98b954EedeAC495271d0F; address usdc = 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48; address usdt = 0xdAC17F958D2ee523a2206206994597C13D831ec7; address susd = 0x57Ab1ec28D129707052df4dF418D58a2D46d5f51; address uni = 0x1f9840a85d5aF5bf1D1762F925BDADdC4201F984; address wbtc = 0x2260FAC5E5542a773Aa44fBCfeDf7C193bc2C599; address renbtc = 0xEB4C2781e4ebA804CE9a9803C67d0893436bB27D; Hevm hevm = Hevm(0x7109709ECfa91a80626fF3989D68f67F5b1DD12D); UniswapRouterV2 univ2 = UniswapRouterV2( 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D ); IUniswapV2Factory univ2Factory = IUniswapV2Factory( 0x5C69bEe701ef814a2B6a3EDD4B1652CB9cc5aA6f ); ICurveFi_4 curveSusdV2 = ICurveFi_4( 0xA5407eAE9Ba41422680e2e00537571bcC53efBfD ); uint256 startTime = block.timestamp; receive() external payable {} fallback () external payable {} function _swap( address _from, address _to, uint256 _amount ) internal { address[] memory path; if (_from == eth || _from == weth) { path = new address[](2); path[0] = weth; path[1] = _to; univ2.swapExactETHForTokens{value: _amount}( 0, path, address(this), now + 60 ); } else { path = new address[](3); path[0] = _from; path[1] = weth; path[2] = _to; IERC20(_from).safeApprove(address(univ2), 0); IERC20(_from).safeApprove(address(univ2), _amount); univ2.swapExactTokensForTokens( _amount, 0, path, address(this), now + 60 ); } } function _getERC20(address token, uint256 _amount) internal { address[] memory path = new address[](2); path[0] = weth; path[1] = token; uint256[] memory ins = univ2.getAmountsIn(_amount, path); uint256 ethAmount = ins[0]; univ2.swapETHForExactTokens{value: ethAmount}( _amount, path, address(this), now + 60 ); } function _getERC20WithETH(address token, uint256 _ethAmount) internal { address[] memory path = new address[](2); path[0] = weth; path[1] = token; univ2.swapExactETHForTokens{value: _ethAmount}( 0, path, address(this), now + 60 ); } function _getUniV2LPToken(address lpToken, uint256 _ethAmount) internal { address token0 = IUniswapV2Pair(lpToken).token0(); address token1 = IUniswapV2Pair(lpToken).token1(); if (token0 != weth) { _getERC20WithETH(token0, _ethAmount.div(2)); } else { WETH(weth).deposit{value: _ethAmount.div(2)}(); } if (token1 != weth) { _getERC20WithETH(token1, _ethAmount.div(2)); } else { WETH(weth).deposit{value: _ethAmount.div(2)}(); } IERC20(token0).safeApprove(address(univ2), uint256(0)); IERC20(token0).safeApprove(address(univ2), uint256(-1)); IERC20(token1).safeApprove(address(univ2), uint256(0)); IERC20(token1).safeApprove(address(univ2), uint256(-1)); univ2.addLiquidity( token0, token1, IERC20(token0).balanceOf(address(this)), IERC20(token1).balanceOf(address(this)), 0, 0, address(this), now + 60 ); } function _getUniV2LPToken( address token0, address token1, uint256 _ethAmount ) internal { _getUniV2LPToken(univ2Factory.getPair(token0, token1), _ethAmount); } function _getFunctionSig(string memory sig) internal pure returns (bytes4) { return bytes4(keccak256(bytes(sig))); } function _getDynamicArray(address payable one) internal pure returns (address payable[] memory) { address payable[] memory targets = new address payable[](1); targets[0] = one; return targets; } function _getDynamicArray(bytes memory one) internal pure returns (bytes[] memory) { bytes[] memory data = new bytes[](1); data[0] = one; return data; } function _getDynamicArray(address payable one, address payable two) internal pure returns (address payable[] memory) { address payable[] memory targets = new address payable[](2); targets[0] = one; targets[1] = two; return targets; } function _getDynamicArray(bytes memory one, bytes memory two) internal pure returns (bytes[] memory) { bytes[] memory data = new bytes[](2); data[0] = one; data[1] = two; return data; } function _getDynamicArray( address payable one, address payable two, address payable three ) internal pure returns (address payable[] memory) { address payable[] memory targets = new address payable[](3); targets[0] = one; targets[1] = two; targets[2] = three; return targets; } function _getDynamicArray( bytes memory one, bytes memory two, bytes memory three ) internal pure returns (bytes[] memory) { bytes[] memory data = new bytes[](3); data[0] = one; data[1] = two; data[2] = three; return data; } } contract StrategyCurveFarmTestBase is DSTestDefiBase { address governance; address strategist; address timelock; address devfund; address treasury; address want; PickleJar pickleJar; ControllerV4 controller; IStrategy strategy; // **** Tests **** function _test_withdraw() internal { uint256 _want = IERC20(want).balanceOf(address(this)); IERC20(want).approve(address(pickleJar), _want); pickleJar.deposit(_want); // Deposits to strategy pickleJar.earn(); // Fast forwards hevm.warp(block.timestamp + 1 weeks); strategy.harvest(); // Withdraws back to pickleJar uint256 _before = IERC20(want).balanceOf(address(pickleJar)); controller.withdrawAll(want); uint256 _after = IERC20(want).balanceOf(address(pickleJar)); assertTrue(_after > _before); _before = IERC20(want).balanceOf(address(this)); pickleJar.withdrawAll(); _after = IERC20(want).balanceOf(address(this)); assertTrue(_after > _before); // Gained some interest assertTrue(_after > _want); } function _test_get_earn_harvest_rewards() internal { uint256 _want = IERC20(want).balanceOf(address(this)); IERC20(want).approve(address(pickleJar), _want); pickleJar.deposit(_want); pickleJar.earn(); // Fast forward one week hevm.warp(block.timestamp + 1 weeks); // Call the harvest function uint256 _before = pickleJar.balance(); uint256 _treasuryBefore = IERC20(want).balanceOf(treasury); strategy.harvest(); uint256 _after = pickleJar.balance(); uint256 _treasuryAfter = IERC20(want).balanceOf(treasury); uint256 earned = _after.sub(_before).mul(1000).div(955); uint256 earnedRewards = earned.mul(45).div(1000); // 4.5% uint256 actualRewardsEarned = _treasuryAfter.sub(_treasuryBefore); // 4.5% performance fee is given assertEqApprox(earnedRewards, actualRewardsEarned); // Withdraw uint256 _devBefore = IERC20(want).balanceOf(devfund); _treasuryBefore = IERC20(want).balanceOf(treasury); uint256 _stratBal = strategy.balanceOf(); pickleJar.withdrawAll(); uint256 _devAfter = IERC20(want).balanceOf(devfund); _treasuryAfter = IERC20(want).balanceOf(treasury); // 0.175% goes to dev uint256 _devFund = _devAfter.sub(_devBefore); assertEq(_devFund, _stratBal.mul(175).div(100000)); // 0.325% goes to treasury uint256 _treasuryFund = _treasuryAfter.sub(_treasuryBefore); assertEq(_treasuryFund, _stratBal.mul(325).div(100000)); } } contract StrategyUniFarmTestBase is DSTestDefiBase { address want; address token1; address governance; address strategist; address timelock; address devfund; address treasury; PickleJar pickleJar; ControllerV4 controller; IStrategy strategy; function _getWant(uint256 ethAmount, uint256 amount) internal { _getERC20(token1, amount); uint256 _token1 = IERC20(token1).balanceOf(address(this)); IERC20(token1).safeApprove(address(univ2), 0); IERC20(token1).safeApprove(address(univ2), _token1); univ2.addLiquidityETH{value: ethAmount}( token1, _token1, 0, 0, address(this), now + 60 ); } // **** Tests **** function _test_timelock() internal { assertTrue(strategy.timelock() == timelock); strategy.setTimelock(address(1)); assertTrue(strategy.timelock() == address(1)); } function _test_withdraw_release() internal { uint256 decimals = ERC20(token1).decimals(); _getWant(10 ether, 4000 * (10**decimals)); uint256 _want = IERC20(want).balanceOf(address(this)); IERC20(want).safeApprove(address(pickleJar), 0); IERC20(want).safeApprove(address(pickleJar), _want); pickleJar.deposit(_want); pickleJar.earn(); hevm.warp(block.timestamp + 1 weeks); strategy.harvest(); // Checking withdraw uint256 _before = IERC20(want).balanceOf(address(pickleJar)); controller.withdrawAll(want); uint256 _after = IERC20(want).balanceOf(address(pickleJar)); assertTrue(_after > _before); _before = IERC20(want).balanceOf(address(this)); pickleJar.withdrawAll(); _after = IERC20(want).balanceOf(address(this)); assertTrue(_after > _before); // Check if we gained interest assertTrue(_after > _want); } function _test_get_earn_harvest_rewards() internal { uint256 decimals = ERC20(token1).decimals(); _getWant(10 ether, 4000 * (10**decimals)); uint256 _want = IERC20(want).balanceOf(address(this)); IERC20(want).safeApprove(address(pickleJar), 0); IERC20(want).safeApprove(address(pickleJar), _want); pickleJar.deposit(_want); pickleJar.earn(); hevm.warp(block.timestamp + 1 weeks); // Call the harvest function uint256 _before = pickleJar.balance(); uint256 _treasuryBefore = IERC20(want).balanceOf(treasury); strategy.harvest(); uint256 _after = pickleJar.balance(); uint256 _treasuryAfter = IERC20(want).balanceOf(treasury); uint256 earned = _after.sub(_before).mul(1000).div(955); uint256 earnedRewards = earned.mul(45).div(1000); // 4.5% uint256 actualRewardsEarned = _treasuryAfter.sub(_treasuryBefore); // 4.5% performance fee is given assertEqApprox(earnedRewards, actualRewardsEarned); // Withdraw uint256 _devBefore = IERC20(want).balanceOf(devfund); _treasuryBefore = IERC20(want).balanceOf(treasury); uint256 _stratBal = strategy.balanceOf(); pickleJar.withdrawAll(); uint256 _devAfter = IERC20(want).balanceOf(devfund); _treasuryAfter = IERC20(want).balanceOf(treasury); // 0.175% goes to dev uint256 _devFund = _devAfter.sub(_devBefore); assertEq(_devFund, _stratBal.mul(175).div(100000)); // 0.325% goes to treasury uint256 _treasuryFund = _treasuryAfter.sub(_treasuryBefore); assertEq(_treasuryFund, _stratBal.mul(325).div(100000)); } } contract PickleSwapTest is DSTestDefiBase { PickleSwap pickleSwap; function setUp() public { pickleSwap = new PickleSwap(); } function _test_uni_lp_swap(address lp1, address lp2) internal { _getUniV2LPToken(lp1, 20 ether); uint256 _balance = IERC20(lp1).balanceOf(address(this)); uint256 _before = IERC20(lp2).balanceOf(address(this)); IERC20(lp1).safeIncreaseAllowance(address(pickleSwap), _balance); pickleSwap.convertWETHPair(lp1, lp2, _balance); uint256 _after = IERC20(lp2).balanceOf(address(this)); assertTrue(_after > _before); assertTrue(_after > 0); } function test_pickleswap_dai_usdc() public { _test_uni_lp_swap( univ2Factory.getPair(weth, dai), univ2Factory.getPair(weth, usdc) ); } function test_pickleswap_dai_usdt() public { _test_uni_lp_swap( univ2Factory.getPair(weth, dai), univ2Factory.getPair(weth, usdt) ); } function test_pickleswap_usdt_susd() public { _test_uni_lp_swap( univ2Factory.getPair(weth, usdt), univ2Factory.getPair(weth, susd) ); } } contract StrategyCmpndDaiV1 is DSTestDefiBase { StrategyCmpdDaiV2 strategy; ControllerV4 controller; PickleJar pickleJar; address governance; address strategist; address timelock; address devfund; address treasury; address want; function setUp() public { want = dai; governance = address(this); strategist = address(new User()); timelock = address(this); devfund = address(new User()); treasury = address(new User()); controller = new ControllerV4( governance, strategist, timelock, devfund, treasury ); strategy = new StrategyCmpdDaiV2( governance, strategist, address(controller), timelock ); pickleJar = new PickleJar( strategy.want(), governance, timelock, address(controller) ); controller.setJar(strategy.want(), address(pickleJar)); controller.approveStrategy(strategy.want(), address(strategy)); controller.setStrategy(strategy.want(), address(strategy)); } function testFail_cmpnd_dai_v1_onlyKeeper_leverage() public { _getERC20(want, 100e18); uint256 _want = IERC20(want).balanceOf(address(this)); IERC20(want).approve(address(pickleJar), _want); pickleJar.deposit(_want); User randomUser = new User(); randomUser.execute(address(strategy), 0, "leverageToMax()", ""); } function testFail_cmpnd_dai_v1_onlyKeeper_deleverage() public { _getERC20(want, 100e18); uint256 _want = IERC20(want).balanceOf(address(this)); IERC20(want).approve(address(pickleJar), _want); pickleJar.deposit(_want); strategy.leverageToMax(); User randomUser = new User(); randomUser.execute(address(strategy), 0, "deleverageToMin()", ""); } function test_cmpnd_dai_v1_comp_accrued() public { _getERC20(want, 1000000e18); uint256 _want = IERC20(want).balanceOf(address(this)); IERC20(want).approve(address(pickleJar), _want); pickleJar.deposit(_want); pickleJar.earn(); strategy.leverageToMax(); uint256 compAccrued = strategy.getCompAccrued(); assertEq(compAccrued, 0); hevm.warp(block.timestamp + 1 days); hevm.roll(block.number + 6171); // Roughly number of blocks per day compAccrued = strategy.getCompAccrued(); assertTrue(compAccrued > 0); } function test_cmpnd_dai_v1_comp_sync() public { _getERC20(want, 1000000e18); uint256 _want = IERC20(want).balanceOf(address(this)); IERC20(want).approve(address(pickleJar), _want); pickleJar.deposit(_want); pickleJar.earn(); // Sets colFactor Buffer to be 3% (safeSync is 5%) strategy.setColFactorLeverageBuffer(30); strategy.leverageToMax(); // Back to 10% strategy.setColFactorLeverageBuffer(100); uint256 colFactor = strategy.getColFactor(); uint256 safeColFactor = strategy.getSafeLeverageColFactor(); assertTrue(colFactor > safeColFactor); // Sync automatically fixes the colFactor for us bool shouldSync = strategy.sync(); assertTrue(shouldSync); colFactor = strategy.getColFactor(); assertEqApprox(colFactor, safeColFactor); shouldSync = strategy.sync(); assertTrue(!shouldSync); } function test_cmpnd_dai_v1_leverage() public { _getERC20(want, 100e18); uint256 _want = IERC20(want).balanceOf(address(this)); IERC20(want).approve(address(pickleJar), _want); pickleJar.deposit(_want); pickleJar.earn(); uint256 _stratInitialBal = strategy.balanceOf(); uint256 _beforeCR = strategy.getColFactor(); uint256 _beforeLev = strategy.getCurrentLeverage(); strategy.leverageToMax(); uint256 _afterCR = strategy.getColFactor(); uint256 _afterLev = strategy.getCurrentLeverage(); uint256 _safeLeverageColFactor = strategy.getSafeLeverageColFactor(); assertTrue(_afterCR > _beforeCR); assertTrue(_afterLev > _beforeLev); assertEqApprox(_safeLeverageColFactor, _afterCR); uint256 _maxLeverage = strategy.getMaxLeverage(); assertTrue(_maxLeverage > 2e18); // Should be ~2.6, depending on colFactorLeverageBuffer uint256 leverageTarget = strategy.getLeveragedSupplyTarget( _stratInitialBal ); uint256 leverageSupplied = strategy.getSupplied(); assertEqApprox( leverageSupplied, _stratInitialBal.mul(_maxLeverage).div(1e18) ); assertEqApprox(leverageSupplied, leverageTarget); uint256 unleveragedSupplied = strategy.getSuppliedUnleveraged(); assertEqApprox(unleveragedSupplied, _stratInitialBal); } function test_cmpnd_dai_v1_deleverage() public { _getERC20(want, 100e18); uint256 _want = IERC20(want).balanceOf(address(this)); IERC20(want).approve(address(pickleJar), _want); pickleJar.deposit(_want); pickleJar.earn(); strategy.leverageToMax(); uint256 _beforeCR = strategy.getColFactor(); uint256 _beforeLev = strategy.getCurrentLeverage(); strategy.deleverageToMin(); uint256 _afterCR = strategy.getColFactor(); uint256 _afterLev = strategy.getCurrentLeverage(); assertTrue(_afterCR < _beforeCR); assertTrue(_afterLev < _beforeLev); assertEq(0, _afterCR); // 0 since we're not borrowing anything uint256 unleveragedSupplied = strategy.getSuppliedUnleveraged(); uint256 supplied = strategy.getSupplied(); assertEqApprox(unleveragedSupplied, supplied); } function test_cmpnd_dai_v1_withdrawSome() public { _getERC20(want, 100e18); uint256 _want = IERC20(want).balanceOf(address(this)); IERC20(want).approve(address(pickleJar), _want); pickleJar.deposit(_want); pickleJar.earn(); strategy.leverageToMax(); uint256 _before = IERC20(want).balanceOf(address(this)); pickleJar.withdraw(25e18); uint256 _after = IERC20(want).balanceOf(address(this)); assertTrue(_after > _before); assertEqApprox(_after.sub(_before), 25e18); _before = IERC20(want).balanceOf(address(this)); pickleJar.withdraw(10e18); _after = IERC20(want).balanceOf(address(this)); assertTrue(_after > _before); assertEqApprox(_after.sub(_before), 10e18); _before = IERC20(want).balanceOf(address(this)); pickleJar.withdraw(30e18); _after = IERC20(want).balanceOf(address(this)); assertTrue(_after > _before); assertEqApprox(_after.sub(_before), 30e18); // Make sure we're still leveraging uint256 _leverage = strategy.getCurrentLeverage(); assertTrue(_leverage > 1e18); } function test_cmpnd_dai_v1_withdrawAll() public { _getERC20(want, 100e18); uint256 _want = IERC20(want).balanceOf(address(this)); IERC20(want).approve(address(pickleJar), _want); pickleJar.deposit(_want); pickleJar.earn(); strategy.leverageToMax(); hevm.warp(block.timestamp + 1 days); hevm.roll(block.number + 6171); // Roughly number of blocks per day strategy.harvest(); // Withdraws back to pickleJar uint256 _before = IERC20(want).balanceOf(address(pickleJar)); controller.withdrawAll(want); uint256 _after = IERC20(want).balanceOf(address(pickleJar)); assertTrue(_after > _before); _before = IERC20(want).balanceOf(address(this)); pickleJar.withdrawAll(); _after = IERC20(want).balanceOf(address(this)); assertTrue(_after > _before); // Gained some interest assertTrue(_after > _want); } function test_cmpnd_dai_v1_earn_harvest_rewards() public { _getERC20(want, 100e18); uint256 _want = IERC20(want).balanceOf(address(this)); IERC20(want).approve(address(pickleJar), _want); pickleJar.deposit(_want); pickleJar.earn(); // Fast forward one week hevm.warp(block.timestamp + 1 days); hevm.roll(block.number + 6171); // Roughly number of blocks per day // Call the harvest function uint256 _before = strategy.getSupplied(); uint256 _treasuryBefore = IERC20(want).balanceOf(treasury); strategy.harvest(); uint256 _after = strategy.getSupplied(); uint256 _treasuryAfter = IERC20(want).balanceOf(treasury); uint256 earned = _after.sub(_before).mul(1000).div(955); uint256 earnedRewards = earned.mul(45).div(1000); // 4.5% uint256 actualRewardsEarned = _treasuryAfter.sub(_treasuryBefore); // 4.5% performance fee is given assertEqApprox(earnedRewards, actualRewardsEarned); // Withdraw uint256 _devBefore = IERC20(want).balanceOf(devfund); _treasuryBefore = IERC20(want).balanceOf(treasury); uint256 _stratBal = strategy.balanceOf(); pickleJar.withdrawAll(); uint256 _devAfter = IERC20(want).balanceOf(devfund); _treasuryAfter = IERC20(want).balanceOf(treasury); // 0.175% goes to dev uint256 _devFund = _devAfter.sub(_devBefore); assertEq(_devFund, _stratBal.mul(175).div(100000)); // 0.325% goes to treasury uint256 _treasuryFund = _treasuryAfter.sub(_treasuryBefore); assertEq(_treasuryFund, _stratBal.mul(325).div(100000)); } function test_cmpnd_dai_v1_functions() public { _getERC20(want, 100e18); uint256 _want = IERC20(want).balanceOf(address(this)); IERC20(want).approve(address(pickleJar), _want); pickleJar.deposit(_want); pickleJar.earn(); uint256 initialSupplied = strategy.getSupplied(); uint256 initialBorrowed = strategy.getBorrowed(); uint256 initialBorrowable = strategy.getBorrowable(); uint256 marketColFactor = strategy.getMarketColFactor(); uint256 maxLeverage = strategy.getMaxLeverage(); // Earn deposits 95% into strategy assertEqApprox(initialSupplied, 95e18); assertEqApprox( initialBorrowable, initialSupplied.mul(marketColFactor).div(1e18) ); assertEqApprox(initialBorrowed, 0); // Leverage to Max strategy.leverageToMax(); uint256 supplied = strategy.getSupplied(); uint256 borrowed = strategy.getBorrowed(); uint256 borrowable = strategy.getBorrowable(); uint256 currentColFactor = strategy.getColFactor(); uint256 safeLeverageColFactor = strategy.getSafeLeverageColFactor(); assertEqApprox(supplied, initialSupplied.mul(maxLeverage).div(1e18)); assertEqApprox(borrowed, supplied.mul(safeLeverageColFactor).div(1e18)); assertEqApprox( borrowable, supplied.mul(marketColFactor.sub(currentColFactor)).div(1e18) ); assertEqApprox(currentColFactor, safeLeverageColFactor); assertTrue(marketColFactor > currentColFactor); assertTrue(marketColFactor > safeLeverageColFactor); // Deleverage strategy.deleverageToMin(); uint256 deleverageSupplied = strategy.getSupplied(); uint256 deleverageBorrowed = strategy.getBorrowed(); uint256 deleverageBorrowable = strategy.getBorrowable(); assertEqApprox(deleverageSupplied, initialSupplied); assertEqApprox(deleverageBorrowed, initialBorrowed); assertEqApprox(deleverageBorrowable, initialBorrowable); } function test_cmpnd_dai_v1_deleverage_stepping() public { _getERC20(want, 100e18); uint256 _want = IERC20(want).balanceOf(address(this)); IERC20(want).approve(address(pickleJar), _want); pickleJar.deposit(_want); pickleJar.earn(); strategy.leverageToMax(); strategy.deleverageUntil(200e18); uint256 supplied = strategy.getSupplied(); assertEqApprox(supplied, 200e18); strategy.deleverageUntil(180e18); supplied = strategy.getSupplied(); assertEqApprox(supplied, 180e18); strategy.deleverageUntil(120e18); supplied = strategy.getSupplied(); assertEqApprox(supplied, 120e18); } } contract StrategyCurve3CRVv2Test is StrategyCurveFarmTestBase { function setUp() public { governance = address(this); strategist = address(this); devfund = address(new User()); treasury = address(new User()); timelock = address(this); want = three_crv; controller = new ControllerV4( governance, strategist, timelock, devfund, treasury ); strategy = IStrategy( address( new StrategyCurve3CRVv2( governance, strategist, address(controller), timelock ) ) ); pickleJar = new PickleJar( strategy.want(), governance, timelock, address(controller) ); controller.setJar(strategy.want(), address(pickleJar)); controller.approveStrategy(strategy.want(), address(strategy)); controller.setStrategy(strategy.want(), address(strategy)); hevm.warp(startTime); _getWant(10000000 ether); } function _getWant(uint256 daiAmount) internal { _getERC20(dai, daiAmount); uint256[3] memory liquidity; liquidity[0] = IERC20(dai).balanceOf(address(this)); IERC20(dai).approve(three_pool, liquidity[0]); ICurveFi_3(three_pool).add_liquidity(liquidity, 0); } // **** Tests **** // function test_3crv_v1_withdraw() public { _test_withdraw(); } function test_3crv_v1_earn_harvest_rewards() public { _test_get_earn_harvest_rewards(); } } contract StrategyCurveRenCRVv2Test is StrategyCurveFarmTestBase { function setUp() public { governance = address(this); strategist = address(this); devfund = address(new User()); treasury = address(new User()); timelock = address(this); want = ren_crv; controller = new ControllerV4( governance, strategist, timelock, devfund, treasury ); strategy = IStrategy( address( new StrategyCurveRenCRVv2( governance, strategist, address(controller), timelock ) ) ); pickleJar = new PickleJar( strategy.want(), governance, timelock, address(controller) ); controller.setJar(strategy.want(), address(pickleJar)); controller.approveStrategy(strategy.want(), address(strategy)); controller.setStrategy(strategy.want(), address(strategy)); hevm.warp(startTime); _getWant(10e8); // 10 wbtc } function _getWant(uint256 btcAmount) internal { _getERC20(wbtc, btcAmount); uint256[2] memory liquidity; liquidity[1] = IERC20(wbtc).balanceOf(address(this)); IERC20(wbtc).approve(ren_pool, liquidity[1]); ICurveFi_2(ren_pool).add_liquidity(liquidity, 0); } // **** Tests **** // function test_rencrv_v1_withdraw() public { _test_withdraw(); } function test_rencrv_v1_earn_harvest_rewards() public { _test_get_earn_harvest_rewards(); } } contract StrategyCurveSCRVv3_2Test is StrategyCurveFarmTestBase { function setUp() public { governance = address(this); strategist = address(this); devfund = address(new User()); treasury = address(new User()); timelock = address(this); want = scrv; controller = new ControllerV4( governance, strategist, timelock, devfund, treasury ); strategy = IStrategy( address( new StrategyCurveSCRVv3_2( governance, strategist, address(controller), timelock ) ) ); pickleJar = new PickleJar( strategy.want(), governance, timelock, address(controller) ); controller.setJar(strategy.want(), address(pickleJar)); controller.approveStrategy(strategy.want(), address(strategy)); controller.setStrategy(strategy.want(), address(strategy)); hevm.warp(startTime); _getWant(10000000 ether); } function _getWant(uint256 daiAmount) internal { _getERC20(dai, daiAmount); uint256[4] memory liquidity; liquidity[0] = IERC20(dai).balanceOf(address(this)); IERC20(dai).approve(susdv2_pool, liquidity[0]); ICurveFi_4(susdv2_pool).add_liquidity(liquidity, 0); } // **** Tests **** // function test_scrv_v3_1_withdraw() public { _test_withdraw(); } function test_scrv_v3_1_earn_harvest_rewards() public { _test_get_earn_harvest_rewards(); } } contract StrategyCurveSCRVv4Test is DSTestDefiBase { address escrow = 0x5f3b5DfEb7B28CDbD7FAba78963EE202a494e2A2; address curveSmartContractChecker = 0xca719728Ef172d0961768581fdF35CB116e0B7a4; address governance; address strategist; address timelock; address devfund; address treasury; PickleJar pickleJar; ControllerV4 controller; StrategyCurveSCRVv4_1 strategy; SCRVVoter scrvVoter; CRVLocker crvLocker; function setUp() public { governance = address(this); strategist = address(new User()); timelock = address(this); devfund = address(new User()); treasury = address(new User()); controller = new ControllerV4( governance, strategist, timelock, devfund, treasury ); crvLocker = new CRVLocker(governance); scrvVoter = new SCRVVoter(governance, address(crvLocker)); strategy = new StrategyCurveSCRVv4_1( address(scrvVoter), address(crvLocker), governance, strategist, address(controller), timelock ); pickleJar = new PickleJar( strategy.want(), governance, timelock, address(controller) ); controller.setJar(strategy.want(), address(pickleJar)); controller.approveStrategy(strategy.want(), address(strategy)); controller.setStrategy(strategy.want(), address(strategy)); scrvVoter.approveStrategy(address(strategy)); scrvVoter.approveStrategy(governance); crvLocker.addVoter(address(scrvVoter)); hevm.warp(startTime); // Approve our strategy on smartContractWhitelist // Modify storage value so we are approved by the smart-wallet-white-list // storage in solidity - https://ethereum.stackexchange.com/a/41304 bytes32 key = bytes32(uint256(address(crvLocker))); bytes32 pos = bytes32(0); // pos 0 as its the first state variable bytes32 loc = keccak256(abi.encodePacked(key, pos)); hevm.store(curveSmartContractChecker, loc, bytes32(uint256(1))); // Make sure our crvLocker is whitelisted assertTrue( ICurveSmartContractChecker(curveSmartContractChecker).wallets( address(crvLocker) ) ); } function _getSCRV(uint256 daiAmount) internal { _getERC20(dai, daiAmount); uint256[4] memory liquidity; liquidity[0] = IERC20(dai).balanceOf(address(this)); IERC20(dai).approve(susdv2_pool, liquidity[0]); ICurveFi_4(susdv2_pool).add_liquidity(liquidity, 0); } // **** Tests **** function test_scrv_v4_1_withdraw() public { _getSCRV(10000000 ether); // 1 million DAI uint256 _scrv = IERC20(scrv).balanceOf(address(this)); IERC20(scrv).approve(address(pickleJar), _scrv); pickleJar.deposit(_scrv); // Deposits to strategy pickleJar.earn(); // Fast forwards hevm.warp(block.timestamp + 1 weeks); strategy.harvest(); // Withdraws back to pickleJar uint256 _before = IERC20(scrv).balanceOf(address(pickleJar)); controller.withdrawAll(scrv); uint256 _after = IERC20(scrv).balanceOf(address(pickleJar)); assertTrue(_after > _before); _before = IERC20(scrv).balanceOf(address(this)); pickleJar.withdrawAll(); _after = IERC20(scrv).balanceOf(address(this)); assertTrue(_after > _before); // Gained some interest assertTrue(_after > _scrv); } function test_scrv_v4_1_get_earn_harvest_rewards() public { address dev = controller.devfund(); // Deposit sCRV, and earn _getSCRV(10000000 ether); // 1 million DAI uint256 _scrv = IERC20(scrv).balanceOf(address(this)); IERC20(scrv).approve(address(pickleJar), _scrv); pickleJar.deposit(_scrv); pickleJar.earn(); // Fast forward one week hevm.warp(block.timestamp + 1 weeks); // Call the harvest function uint256 _before = pickleJar.balance(); uint256 _rewardsBefore = IERC20(scrv).balanceOf(treasury); User(strategist).execute(address(strategy), 0, "harvest()", ""); uint256 _after = pickleJar.balance(); uint256 _rewardsAfter = IERC20(scrv).balanceOf(treasury); uint256 earned = _after.sub(_before).mul(1000).div(955); uint256 earnedRewards = earned.mul(45).div(1000); // 4.5% uint256 actualRewardsEarned = _rewardsAfter.sub(_rewardsBefore); // 4.5% performance fee is given assertEqApprox(earnedRewards, actualRewardsEarned); // Withdraw uint256 _devBefore = IERC20(scrv).balanceOf(dev); uint256 _stratBal = strategy.balanceOf(); pickleJar.withdrawAll(); uint256 _devAfter = IERC20(scrv).balanceOf(dev); // 0.175% goes to dev uint256 _devFund = _devAfter.sub(_devBefore); assertEq(_devFund, _stratBal.mul(175).div(100000)); } function test_scrv_v4_1_lock() public { // Deposit sCRV, and earn _getSCRV(10000000 ether); // 1 million DAI uint256 _scrv = IERC20(scrv).balanceOf(address(this)); IERC20(scrv).approve(address(pickleJar), _scrv); pickleJar.deposit(_scrv); pickleJar.earn(); // Fast forward one week hevm.warp(block.timestamp + 1 weeks); uint256 _before = IERC20(crv).balanceOf(address(crvLocker)); // Call the harvest function strategy.harvest(); // Make sure we can open lock uint256 _after = IERC20(crv).balanceOf(address(crvLocker)); assertTrue(_after > _before); // Create a lock crvLocker.createLock(_after, block.timestamp + 5 weeks); // Harvest etc hevm.warp(block.timestamp + 1 weeks); strategy.harvest(); // Increase amount crvLocker.increaseAmount(IERC20(crv).balanceOf(address(crvLocker))); // Increase unlockTime crvLocker.increaseUnlockTime(block.timestamp + 5 weeks); // Fast forward hevm.warp(block.timestamp + 5 weeks + 1 hours); // Withdraw _before = IERC20(crv).balanceOf(address(crvLocker)); crvLocker.release(); _after = IERC20(crv).balanceOf(address(crvLocker)); assertTrue(_after > _before); } } contract StrategyUniEthDaiLpV4Test is StrategyUniFarmTestBase { function setUp() public { want = 0xA478c2975Ab1Ea89e8196811F51A7B7Ade33eB11; token1 = dai; governance = address(this); strategist = address(this); devfund = address(new User()); treasury = address(new User()); timelock = address(this); controller = new ControllerV4( governance, strategist, timelock, devfund, treasury ); strategy = IStrategy( address( new StrategyUniEthDaiLpV4( governance, strategist, address(controller), timelock ) ) ); pickleJar = new PickleJar( strategy.want(), governance, timelock, address(controller) ); controller.setJar(strategy.want(), address(pickleJar)); controller.approveStrategy(strategy.want(), address(strategy)); controller.setStrategy(strategy.want(), address(strategy)); // Set time hevm.warp(startTime); } // **** Tests **** function test_ethdaiv3_1_timelock() public { _test_timelock(); } function test_ethdaiv3_1_withdraw_release() public { _test_withdraw_release(); } function test_ethdaiv3_1_get_earn_harvest_rewards() public { _test_get_earn_harvest_rewards(); } } contract StrategyUniEthUsdcLpV4Test is StrategyUniFarmTestBase { function setUp() public { want = 0xB4e16d0168e52d35CaCD2c6185b44281Ec28C9Dc; token1 = usdc; governance = address(this); strategist = address(this); devfund = address(new User()); treasury = address(new User()); timelock = address(this); controller = new ControllerV4( governance, strategist, timelock, devfund, treasury ); strategy = IStrategy( address( new StrategyUniEthUsdcLpV4( governance, strategist, address(controller), timelock ) ) ); pickleJar = new PickleJar( strategy.want(), governance, timelock, address(controller) ); controller.setJar(strategy.want(), address(pickleJar)); controller.approveStrategy(strategy.want(), address(strategy)); controller.setStrategy(strategy.want(), address(strategy)); // Set time hevm.warp(startTime); } // **** Tests **** function test_ethusdcv3_1_timelock() public { _test_timelock(); } function test_ethusdcv3_1_withdraw_release() public { _test_withdraw_release(); } function test_ethusdcv3_1_get_earn_harvest_rewards() public { _test_get_earn_harvest_rewards(); } } contract StrategyUniEthUsdtLpV4Test is StrategyUniFarmTestBase { function setUp() public { want = 0x0d4a11d5EEaaC28EC3F61d100daF4d40471f1852; token1 = usdt; governance = address(this); strategist = address(this); devfund = address(new User()); treasury = address(new User()); timelock = address(this); controller = new ControllerV4( governance, strategist, timelock, devfund, treasury ); strategy = IStrategy( address( new StrategyUniEthUsdtLpV4( governance, strategist, address(controller), timelock ) ) ); pickleJar = new PickleJar( strategy.want(), governance, timelock, address(controller) ); controller.setJar(strategy.want(), address(pickleJar)); controller.approveStrategy(strategy.want(), address(strategy)); controller.setStrategy(strategy.want(), address(strategy)); // Set time hevm.warp(startTime); } // **** Tests **** function test_ethusdtv3_1_timelock() public { _test_timelock(); } function test_ethusdtv3_1_withdraw_release() public { _test_withdraw_release(); } function test_ethusdtv3_1_get_earn_harvest_rewards() public { _test_get_earn_harvest_rewards(); } } contract StrategyUniEthWBtcLpV2Test is StrategyUniFarmTestBase { function setUp() public { want = 0xBb2b8038a1640196FbE3e38816F3e67Cba72D940; token1 = wbtc; governance = address(this); strategist = address(this); devfund = address(new User()); treasury = address(new User()); timelock = address(this); controller = new ControllerV4( governance, strategist, timelock, devfund, treasury ); strategy = IStrategy( address( new StrategyUniEthWBtcLpV2( governance, strategist, address(controller), timelock ) ) ); pickleJar = new PickleJar( strategy.want(), governance, timelock, address(controller) ); controller.setJar(strategy.want(), address(pickleJar)); controller.approveStrategy(strategy.want(), address(strategy)); controller.setStrategy(strategy.want(), address(strategy)); // Set time hevm.warp(startTime); } // **** Tests **** function test_ethwbtcv1_timelock() public { _test_timelock(); } function test_ethwbtcv1_withdraw_release() public { _test_withdraw_release(); } function test_ethwbtcv1_get_earn_harvest_rewards() public { _test_get_earn_harvest_rewards(); } } contract UniCurveConverterTest is DSTestDefiBase { UniCurveConverter uniCurveConverter; function setUp() public { uniCurveConverter = new UniCurveConverter(); } function _test_uni_curve_converter(address token0, address token1) internal { address lp = univ2Factory.getPair(token0, token1); _getUniV2LPToken(lp, 100 ether); uint256 _balance = IERC20(lp).balanceOf(address(this)); IERC20(lp).safeApprove(address(uniCurveConverter), 0); IERC20(lp).safeApprove(address(uniCurveConverter), uint256(-1)); uint256 _before = IERC20(scrv).balanceOf(address(this)); uniCurveConverter.convert(lp, _balance); uint256 _after = IERC20(scrv).balanceOf(address(this)); // Gets scrv assertTrue(_after > _before); assertTrue(_after > 0); // No token left behind in router assertEq(IERC20(token0).balanceOf(address(uniCurveConverter)), 0); assertEq(IERC20(token1).balanceOf(address(uniCurveConverter)), 0); assertEq(IERC20(weth).balanceOf(address(uniCurveConverter)), 0); assertEq(IERC20(dai).balanceOf(address(uniCurveConverter)), 0); assertEq(IERC20(usdc).balanceOf(address(uniCurveConverter)), 0); assertEq(IERC20(usdt).balanceOf(address(uniCurveConverter)), 0); assertEq(IERC20(susd).balanceOf(address(uniCurveConverter)), 0); } function test_uni_curve_convert_dai_weth() public { _test_uni_curve_converter(dai, weth); } function test_uni_curve_convert_usdt_weth() public { _test_uni_curve_converter(usdt, weth); } function test_uni_curve_convert_wbtc_weth() public { _test_uni_curve_converter(wbtc, weth); } } contract StrategyCurveCurveJarSwapTest is DSTestDefiBase { address governance; address strategist; address devfund; address treasury; address timelock; IStrategy[] curveStrategies; PickleJar[] curvePickleJars; ControllerV4 controller; CurveProxyLogic curveProxyLogic; UniswapV2ProxyLogic uniswapV2ProxyLogic; address[] curvePools; address[] curveLps; function setUp() public { governance = address(this); strategist = address(this); devfund = address(new User()); treasury = address(new User()); timelock = address(this); controller = new ControllerV4( governance, strategist, timelock, devfund, treasury ); // Curve Strategies curveStrategies = new IStrategy[](3); curvePickleJars = new PickleJar[](curveStrategies.length); curveLps = new address[](curveStrategies.length); curvePools = new address[](curveStrategies.length); curveLps[0] = three_crv; curvePools[0] = three_pool; curveStrategies[0] = IStrategy( address( new StrategyCurve3CRVv2( governance, strategist, address(controller), timelock ) ) ); curveLps[1] = scrv; curvePools[1] = susdv2_pool; curveStrategies[1] = IStrategy( address( new StrategyCurveSCRVv3_2( governance, strategist, address(controller), timelock ) ) ); curveLps[2] = ren_crv; curvePools[2] = ren_pool; curveStrategies[2] = IStrategy( address( new StrategyCurveRenCRVv2( governance, strategist, address(controller), timelock ) ) ); // Create PICKLE Jars for (uint256 i = 0; i < curvePickleJars.length; i++) { curvePickleJars[i] = new PickleJar( curveStrategies[i].want(), governance, timelock, address(controller) ); controller.setJar( curveStrategies[i].want(), address(curvePickleJars[i]) ); controller.approveStrategy( curveStrategies[i].want(), address(curveStrategies[i]) ); controller.setStrategy( curveStrategies[i].want(), address(curveStrategies[i]) ); } curveProxyLogic = new CurveProxyLogic(); uniswapV2ProxyLogic = new UniswapV2ProxyLogic(); controller.approveJarConverter(address(curveProxyLogic)); controller.approveJarConverter(address(uniswapV2ProxyLogic)); hevm.warp(startTime); } function _getCurveLP(address curve, uint256 amount) internal { if (curve == ren_pool) { _getERC20(wbtc, amount); uint256 _wbtc = IERC20(wbtc).balanceOf(address(this)); IERC20(wbtc).approve(curve, _wbtc); uint256[2] memory liquidity; liquidity[1] = _wbtc; ICurveFi_2(curve).add_liquidity(liquidity, 0); } else { _getERC20(dai, amount); uint256 _dai = IERC20(dai).balanceOf(address(this)); IERC20(dai).approve(curve, _dai); if (curve == three_pool) { uint256[3] memory liquidity; liquidity[0] = _dai; ICurveFi_3(curve).add_liquidity(liquidity, 0); } else { uint256[4] memory liquidity; liquidity[0] = _dai; ICurveFi_4(curve).add_liquidity(liquidity, 0); } } } // **** Internal functions **** // // Theres so many internal functions due to stack blowing up // Some post swap checks // Checks if there's any leftover funds in the converter contract function _post_swap_check(uint256 fromIndex, uint256 toIndex) internal { IERC20 token0 = curvePickleJars[fromIndex].token(); IERC20 token1 = curvePickleJars[toIndex].token(); uint256 MAX_DUST = 10; // No funds left behind assertEq(curvePickleJars[fromIndex].balanceOf(address(controller)), 0); assertEq(curvePickleJars[toIndex].balanceOf(address(controller)), 0); assertTrue(token0.balanceOf(address(controller)) < MAX_DUST); assertTrue(token1.balanceOf(address(controller)) < MAX_DUST); // Make sure only controller can call 'withdrawForSwap' try curveStrategies[fromIndex].withdrawForSwap(0) { revert("!withdraw-for-swap-only-controller"); } catch {} } function _test_check_treasury_fee(uint256 _amount, uint256 earned) internal { assertEqApprox( _amount.mul(controller.convenienceFee()).div( controller.convenienceFeeMax() ), earned.mul(2) ); } function _test_swap_and_check_balances( address fromPickleJar, address toPickleJar, address fromPickleJarUnderlying, uint256 fromPickleJarUnderlyingAmount, address payable[] memory targets, bytes[] memory data ) internal { uint256 _beforeTo = IERC20(toPickleJar).balanceOf(address(this)); uint256 _beforeFrom = IERC20(fromPickleJar).balanceOf(address(this)); uint256 _beforeDev = IERC20(fromPickleJarUnderlying).balanceOf(devfund); uint256 _beforeTreasury = IERC20(fromPickleJarUnderlying).balanceOf( treasury ); uint256 _ret = controller.swapExactJarForJar( fromPickleJar, toPickleJar, fromPickleJarUnderlyingAmount, 0, // Min receive amount targets, data ); uint256 _afterTo = IERC20(toPickleJar).balanceOf(address(this)); uint256 _afterFrom = IERC20(fromPickleJar).balanceOf(address(this)); uint256 _afterDev = IERC20(fromPickleJarUnderlying).balanceOf(devfund); uint256 _afterTreasury = IERC20(fromPickleJarUnderlying).balanceOf( treasury ); uint256 treasuryEarned = _afterTreasury.sub(_beforeTreasury); assertEq(treasuryEarned, _afterDev.sub(_beforeDev)); assertTrue(treasuryEarned > 0); _test_check_treasury_fee(fromPickleJarUnderlyingAmount, treasuryEarned); assertTrue(_afterFrom < _beforeFrom); assertTrue(_afterTo > _beforeTo); assertTrue(_afterTo.sub(_beforeTo) > 0); assertEq(_afterTo.sub(_beforeTo), _ret); assertEq(_afterFrom, 0); } function _get_uniswap_pl_swap_data(address from, address to) internal pure returns (bytes memory) { return abi.encodeWithSignature("swapUniswap(address,address)", from, to); } function _test_curve_curve( uint256 fromIndex, uint256 toIndex, uint256 amount, address payable[] memory targets, bytes[] memory data ) public { // Get LP _getCurveLP(curvePools[fromIndex], amount); // Deposit into pickle jars address from = address(curvePickleJars[fromIndex].token()); uint256 _from = IERC20(from).balanceOf(address(this)); IERC20(from).approve(address(curvePickleJars[fromIndex]), _from); curvePickleJars[fromIndex].deposit(_from); curvePickleJars[fromIndex].earn(); // Approve controller uint256 _fromPickleJar = IERC20(address(curvePickleJars[fromIndex])) .balanceOf(address(this)); IERC20(address(curvePickleJars[fromIndex])).approve( address(controller), _fromPickleJar ); // Swap try controller.swapExactJarForJar( address(curvePickleJars[fromIndex]), address(curvePickleJars[toIndex]), _fromPickleJar, uint256(-1), // Min receive amount targets, data ) { revert("min-receive-amount"); } catch {} _test_swap_and_check_balances( address(curvePickleJars[fromIndex]), address(curvePickleJars[toIndex]), from, _fromPickleJar, targets, data ); _post_swap_check(fromIndex, toIndex); } // **** Tests **** function test_jar_converter_curve_curve_0() public { uint256 fromIndex = 0; uint256 toIndex = 1; uint256 amount = 400e18; int128 fromCurveUnderlyingIndex = 0; bytes4 toCurveFunctionSig = _getFunctionSig( "add_liquidity(uint256[4],uint256)" ); uint256 toCurvePoolSize = 4; uint256 toCurveUnderlyingIndex = 0; address toCurveUnderlying = dai; // Remove liquidity address fromCurve = curvePools[fromIndex]; address fromCurveLp = curveLps[fromIndex]; address payable target0 = payable(address(curveProxyLogic)); bytes memory data0 = abi.encodeWithSignature( "remove_liquidity_one_coin(address,address,int128)", fromCurve, fromCurveLp, fromCurveUnderlyingIndex ); // Add liquidity address toCurve = curvePools[toIndex]; address payable target1 = payable(address(curveProxyLogic)); bytes memory data1 = abi.encodeWithSignature( "add_liquidity(address,bytes4,uint256,uint256,address)", toCurve, toCurveFunctionSig, toCurvePoolSize, toCurveUnderlyingIndex, toCurveUnderlying ); // Swap _test_curve_curve( fromIndex, toIndex, amount, _getDynamicArray(target0, target1), _getDynamicArray(data0, data1) ); } function test_jar_converter_curve_curve_1() public { uint256 fromIndex = 0; uint256 toIndex = 2; uint256 amount = 400e18; int128 fromCurveUnderlyingIndex = 0; bytes4 toCurveFunctionSig = _getFunctionSig( "add_liquidity(uint256[2],uint256)" ); uint256 toCurvePoolSize = 2; uint256 toCurveUnderlyingIndex = 1; address toCurveUnderlying = wbtc; // Remove liquidity address fromCurve = curvePools[fromIndex]; address fromCurveLp = curveLps[fromIndex]; bytes memory data0 = abi.encodeWithSignature( "remove_liquidity_one_coin(address,address,int128)", fromCurve, fromCurveLp, fromCurveUnderlyingIndex ); // Swap bytes memory data1 = _get_uniswap_pl_swap_data(dai, toCurveUnderlying); // Add liquidity address toCurve = curvePools[toIndex]; bytes memory data2 = abi.encodeWithSignature( "add_liquidity(address,bytes4,uint256,uint256,address)", toCurve, toCurveFunctionSig, toCurvePoolSize, toCurveUnderlyingIndex, toCurveUnderlying ); _test_curve_curve( fromIndex, toIndex, amount, _getDynamicArray( payable(address(curveProxyLogic)), payable(address(uniswapV2ProxyLogic)), payable(address(curveProxyLogic)) ), _getDynamicArray(data0, data1, data2) ); } function test_jar_converter_curve_curve_2() public { uint256 fromIndex = 1; uint256 toIndex = 0; uint256 amount = 400e18; int128 fromCurveUnderlyingIndex = 1; bytes4 toCurveFunctionSig = _getFunctionSig( "add_liquidity(uint256[3],uint256)" ); uint256 toCurvePoolSize = 3; uint256 toCurveUnderlyingIndex = 2; address toCurveUnderlying = usdt; // Remove liquidity address fromCurve = susdv2_deposit; // curvePools[fromIndex]; address fromCurveLp = curveLps[fromIndex]; bytes memory data0 = abi.encodeWithSignature( "remove_liquidity_one_coin(address,address,int128)", fromCurve, fromCurveLp, fromCurveUnderlyingIndex ); // Swap bytes memory data1 = _get_uniswap_pl_swap_data(usdc, usdt); // Add liquidity address toCurve = curvePools[toIndex]; bytes memory data2 = abi.encodeWithSignature( "add_liquidity(address,bytes4,uint256,uint256,address)", toCurve, toCurveFunctionSig, toCurvePoolSize, toCurveUnderlyingIndex, toCurveUnderlying ); _test_curve_curve( fromIndex, toIndex, amount, _getDynamicArray( payable(address(curveProxyLogic)), payable(address(uniswapV2ProxyLogic)), payable(address(curveProxyLogic)) ), _getDynamicArray(data0, data1, data2) ); } function test_jar_converter_curve_curve_3() public { uint256 fromIndex = 2; uint256 toIndex = 0; uint256 amount = 4e6; int128 fromCurveUnderlyingIndex = 1; bytes4 toCurveFunctionSig = _getFunctionSig( "add_liquidity(uint256[3],uint256)" ); uint256 toCurvePoolSize = 3; uint256 toCurveUnderlyingIndex = 1; address toCurveUnderlying = usdc; // Remove liquidity address fromCurve = curvePools[fromIndex]; address fromCurveLp = curveLps[fromIndex]; bytes memory data0 = abi.encodeWithSignature( "remove_liquidity_one_coin(address,address,int128)", fromCurve, fromCurveLp, fromCurveUnderlyingIndex ); // Swap bytes memory data1 = _get_uniswap_pl_swap_data(wbtc, usdc); // Add liquidity address toCurve = curvePools[toIndex]; bytes memory data2 = abi.encodeWithSignature( "add_liquidity(address,bytes4,uint256,uint256,address)", toCurve, toCurveFunctionSig, toCurvePoolSize, toCurveUnderlyingIndex, toCurveUnderlying ); _test_curve_curve( fromIndex, toIndex, amount, _getDynamicArray( payable(address(curveProxyLogic)), payable(address(uniswapV2ProxyLogic)), payable(address(curveProxyLogic)) ), _getDynamicArray(data0, data1, data2) ); } function test_jar_converter_curve_curve_4() public { uint256 fromIndex = 1; uint256 toIndex = 0; uint256 amount = 400e18; int128 fromCurveUnderlyingIndex = 2; bytes4 toCurveFunctionSig = _getFunctionSig( "add_liquidity(uint256[3],uint256)" ); uint256 toCurvePoolSize = 3; uint256 toCurveUnderlyingIndex = 1; address toCurveUnderlying = usdc; // Remove liquidity address fromCurve = susdv2_deposit; address fromCurveLp = curveLps[fromIndex]; bytes memory data0 = abi.encodeWithSignature( "remove_liquidity_one_coin(address,address,int128)", fromCurve, fromCurveLp, fromCurveUnderlyingIndex ); // Swap bytes memory data1 = _get_uniswap_pl_swap_data(usdt, usdc); // Add liquidity address toCurve = curvePools[toIndex]; bytes memory data2 = abi.encodeWithSignature( "add_liquidity(address,bytes4,uint256,uint256,address)", toCurve, toCurveFunctionSig, toCurvePoolSize, toCurveUnderlyingIndex, toCurveUnderlying ); _test_curve_curve( fromIndex, toIndex, amount, _getDynamicArray( payable(address(curveProxyLogic)), payable(address(uniswapV2ProxyLogic)), payable(address(curveProxyLogic)) ), _getDynamicArray(data0, data1, data2) ); } } contract StrategyCurveUniJarSwapTest is DSTestDefiBase { address governance; address strategist; address devfund; address treasury; address timelock; IStrategy[] curveStrategies; IStrategy[] uniStrategies; PickleJar[] curvePickleJars; PickleJar[] uniPickleJars; ControllerV4 controller; CurveProxyLogic curveProxyLogic; UniswapV2ProxyLogic uniswapV2ProxyLogic; address[] curvePools; address[] curveLps; address[] uniUnderlying; // Contract wide variable to avoid stack too deep errors uint256 temp; function setUp() public { governance = address(this); strategist = address(this); devfund = address(new User()); treasury = address(new User()); timelock = address(this); controller = new ControllerV4( governance, strategist, timelock, devfund, treasury ); // Curve Strategies curveStrategies = new IStrategy[](3); curvePickleJars = new PickleJar[](curveStrategies.length); curveLps = new address[](curveStrategies.length); curvePools = new address[](curveStrategies.length); curveLps[0] = three_crv; curvePools[0] = three_pool; curveStrategies[0] = IStrategy( address( new StrategyCurve3CRVv2( governance, strategist, address(controller), timelock ) ) ); curveLps[1] = scrv; curvePools[1] = susdv2_pool; curveStrategies[1] = IStrategy( address( new StrategyCurveSCRVv3_2( governance, strategist, address(controller), timelock ) ) ); curveLps[2] = ren_crv; curvePools[2] = ren_pool; curveStrategies[2] = IStrategy( address( new StrategyCurveRenCRVv2( governance, strategist, address(controller), timelock ) ) ); // Create PICKLE Jars for (uint256 i = 0; i < curvePickleJars.length; i++) { curvePickleJars[i] = new PickleJar( curveStrategies[i].want(), governance, timelock, address(controller) ); controller.setJar( curveStrategies[i].want(), address(curvePickleJars[i]) ); controller.approveStrategy( curveStrategies[i].want(), address(curveStrategies[i]) ); controller.setStrategy( curveStrategies[i].want(), address(curveStrategies[i]) ); } // Uni strategies uniStrategies = new IStrategy[](4); uniUnderlying = new address[](uniStrategies.length); uniPickleJars = new PickleJar[](uniStrategies.length); uniUnderlying[0] = dai; uniStrategies[0] = IStrategy( address( new StrategyUniEthDaiLpV4( governance, strategist, address(controller), timelock ) ) ); uniUnderlying[1] = usdc; uniStrategies[1] = IStrategy( address( new StrategyUniEthUsdcLpV4( governance, strategist, address(controller), timelock ) ) ); uniUnderlying[2] = usdt; uniStrategies[2] = IStrategy( address( new StrategyUniEthUsdtLpV4( governance, strategist, address(controller), timelock ) ) ); uniUnderlying[3] = wbtc; uniStrategies[3] = IStrategy( address( new StrategyUniEthWBtcLpV2( governance, strategist, address(controller), timelock ) ) ); for (uint256 i = 0; i < uniStrategies.length; i++) { uniPickleJars[i] = new PickleJar( uniStrategies[i].want(), governance, timelock, address(controller) ); controller.setJar( uniStrategies[i].want(), address(uniPickleJars[i]) ); controller.approveStrategy( uniStrategies[i].want(), address(uniStrategies[i]) ); controller.setStrategy( uniStrategies[i].want(), address(uniStrategies[i]) ); } curveProxyLogic = new CurveProxyLogic(); uniswapV2ProxyLogic = new UniswapV2ProxyLogic(); controller.approveJarConverter(address(curveProxyLogic)); controller.approveJarConverter(address(uniswapV2ProxyLogic)); hevm.warp(startTime); } function _getCurveLP(address curve, uint256 amount) internal { if (curve == ren_pool) { _getERC20(wbtc, amount); uint256 _wbtc = IERC20(wbtc).balanceOf(address(this)); IERC20(wbtc).approve(curve, _wbtc); uint256[2] memory liquidity; liquidity[1] = _wbtc; ICurveFi_2(curve).add_liquidity(liquidity, 0); } else { _getERC20(dai, amount); uint256 _dai = IERC20(dai).balanceOf(address(this)); IERC20(dai).approve(curve, _dai); if (curve == three_pool) { uint256[3] memory liquidity; liquidity[0] = _dai; ICurveFi_3(curve).add_liquidity(liquidity, 0); } else { uint256[4] memory liquidity; liquidity[0] = _dai; ICurveFi_4(curve).add_liquidity(liquidity, 0); } } } function _get_primitive_to_lp_data( address from, address to, address dustRecipient ) internal pure returns (bytes memory) { return abi.encodeWithSignature( "primitiveToLpTokens(address,address,address)", from, to, dustRecipient ); } function _get_curve_remove_liquidity_data( address curve, address curveLP, int128 index ) internal pure returns (bytes memory) { return abi.encodeWithSignature( "remove_liquidity_one_coin(address,address,int128)", curve, curveLP, index ); } // Some post swap checks // Checks if there's any leftover funds in the converter contract function _post_swap_check(uint256 fromIndex, uint256 toIndex) internal { IERC20 token0 = curvePickleJars[fromIndex].token(); IUniswapV2Pair token1 = IUniswapV2Pair( address(uniPickleJars[toIndex].token()) ); uint256 MAX_DUST = 1000; // No funds left behind assertEq(curvePickleJars[fromIndex].balanceOf(address(controller)), 0); assertEq(uniPickleJars[toIndex].balanceOf(address(controller)), 0); assertTrue(token0.balanceOf(address(controller)) < MAX_DUST); assertTrue(token1.balanceOf(address(controller)) < MAX_DUST); // Curve -> UNI LP should be optimal supply // Note: We refund the access, which is why its checking this balance assertTrue(IERC20(token1.token0()).balanceOf(address(this)) < MAX_DUST); assertTrue(IERC20(token1.token1()).balanceOf(address(this)) < MAX_DUST); // Make sure only controller can call 'withdrawForSwap' try curveStrategies[fromIndex].withdrawForSwap(0) { revert("!withdraw-for-swap-only-controller"); } catch {} } function _test_check_treasury_fee(uint256 _amount, uint256 earned) internal { assertEqApprox( _amount.mul(controller.convenienceFee()).div( controller.convenienceFeeMax() ), earned.mul(2) ); } function _test_swap_and_check_balances( address fromPickleJar, address toPickleJar, address fromPickleJarUnderlying, uint256 fromPickleJarUnderlyingAmount, address payable[] memory targets, bytes[] memory data ) internal { uint256 _beforeTo = IERC20(toPickleJar).balanceOf(address(this)); uint256 _beforeFrom = IERC20(fromPickleJar).balanceOf(address(this)); uint256 _beforeDev = IERC20(fromPickleJarUnderlying).balanceOf(devfund); uint256 _beforeTreasury = IERC20(fromPickleJarUnderlying).balanceOf( treasury ); uint256 _ret = controller.swapExactJarForJar( fromPickleJar, toPickleJar, fromPickleJarUnderlyingAmount, 0, // Min receive amount targets, data ); uint256 _afterTo = IERC20(toPickleJar).balanceOf(address(this)); uint256 _afterFrom = IERC20(fromPickleJar).balanceOf(address(this)); uint256 _afterDev = IERC20(fromPickleJarUnderlying).balanceOf(devfund); uint256 _afterTreasury = IERC20(fromPickleJarUnderlying).balanceOf( treasury ); uint256 treasuryEarned = _afterTreasury.sub(_beforeTreasury); assertEq(treasuryEarned, _afterDev.sub(_beforeDev)); assertTrue(treasuryEarned > 0); _test_check_treasury_fee(fromPickleJarUnderlyingAmount, treasuryEarned); assertTrue(_afterFrom < _beforeFrom); assertTrue(_afterTo > _beforeTo); assertTrue(_afterTo.sub(_beforeTo) > 0); assertEq(_afterTo.sub(_beforeTo), _ret); assertEq(_afterFrom, 0); } function _test_curve_uni_swap( uint256 fromIndex, uint256 toIndex, uint256 amount, address payable[] memory targets, bytes[] memory data ) internal { // Deposit into PickleJars address from = address(curvePickleJars[fromIndex].token()); _getCurveLP(curvePools[fromIndex], amount); uint256 _from = IERC20(from).balanceOf(address(this)); IERC20(from).approve(address(curvePickleJars[fromIndex]), _from); curvePickleJars[fromIndex].deposit(_from); curvePickleJars[fromIndex].earn(); // Swap! uint256 _fromPickleJar = IERC20(address(curvePickleJars[fromIndex])) .balanceOf(address(this)); IERC20(address(curvePickleJars[fromIndex])).approve( address(controller), _fromPickleJar ); // Check minimum amount try controller.swapExactJarForJar( address(curvePickleJars[fromIndex]), address(uniPickleJars[toIndex]), _fromPickleJar, uint256(-1), // Min receive amount targets, data ) { revert("min-amount-should-fail"); } catch {} _test_swap_and_check_balances( address(curvePickleJars[fromIndex]), address(uniPickleJars[toIndex]), from, _fromPickleJar, targets, data ); _post_swap_check(fromIndex, toIndex); } // **** Tests **** // function test_jar_converter_curve_uni_0_0() public { uint256 fromIndex = 0; uint256 toIndex = 0; uint256 amount = 400e18; address fromUnderlying = dai; int128 fromUnderlyingIndex = 0; address curvePool = curvePools[fromIndex]; address toUnderlying = uniUnderlying[toIndex]; address toWant = univ2Factory.getPair(weth, toUnderlying); bytes memory data0 = _get_curve_remove_liquidity_data( curvePool, curveLps[fromIndex], fromUnderlyingIndex ); bytes memory data1 = _get_primitive_to_lp_data( fromUnderlying, toWant, treasury ); _test_curve_uni_swap( fromIndex, toIndex, amount, _getDynamicArray( payable(address(curveProxyLogic)), payable(address(uniswapV2ProxyLogic)) ), _getDynamicArray(data0, data1) ); } function test_jar_converter_curve_uni_0_1() public { uint256 fromIndex = 0; uint256 toIndex = 1; uint256 amount = 400e18; address fromUnderlying = usdc; int128 fromUnderlyingIndex = 1; address curvePool = curvePools[fromIndex]; address toUnderlying = uniUnderlying[toIndex]; address toWant = univ2Factory.getPair(weth, toUnderlying); bytes memory data0 = _get_curve_remove_liquidity_data( curvePool, curveLps[fromIndex], fromUnderlyingIndex ); bytes memory data1 = _get_primitive_to_lp_data( fromUnderlying, toWant, treasury ); _test_curve_uni_swap( fromIndex, toIndex, amount, _getDynamicArray( payable(address(curveProxyLogic)), payable(address(uniswapV2ProxyLogic)) ), _getDynamicArray(data0, data1) ); } function test_jar_converter_curve_uni_0_2() public { uint256 fromIndex = 0; uint256 toIndex = 2; uint256 amount = 400e18; address fromUnderlying = usdt; int128 fromUnderlyingIndex = 2; address curvePool = curvePools[fromIndex]; address toUnderlying = uniUnderlying[toIndex]; address toWant = univ2Factory.getPair(weth, toUnderlying); bytes memory data0 = _get_curve_remove_liquidity_data( curvePool, curveLps[fromIndex], fromUnderlyingIndex ); bytes memory data1 = _get_primitive_to_lp_data( fromUnderlying, toWant, treasury ); _test_curve_uni_swap( fromIndex, toIndex, amount, _getDynamicArray( payable(address(curveProxyLogic)), payable(address(uniswapV2ProxyLogic)) ), _getDynamicArray(data0, data1) ); } function test_jar_converter_curve_uni_0_3() public { uint256 fromIndex = 0; uint256 toIndex = 3; uint256 amount = 400e18; address fromUnderlying = usdt; int128 fromUnderlyingIndex = 2; address curvePool = curvePools[fromIndex]; address toUnderlying = uniUnderlying[toIndex]; address toWant = univ2Factory.getPair(weth, toUnderlying); bytes memory data0 = _get_curve_remove_liquidity_data( curvePool, curveLps[fromIndex], fromUnderlyingIndex ); bytes memory data1 = _get_primitive_to_lp_data( fromUnderlying, toWant, treasury ); _test_curve_uni_swap( fromIndex, toIndex, amount, _getDynamicArray( payable(address(curveProxyLogic)), payable(address(uniswapV2ProxyLogic)) ), _getDynamicArray(data0, data1) ); } function test_jar_converter_curve_uni_1_0() public { uint256 fromIndex = 1; uint256 toIndex = 0; uint256 amount = 400e18; address fromUnderlying = usdt; int128 fromUnderlyingIndex = 2; address curvePool = susdv2_deposit; // curvePools[fromIndex]; address toUnderlying = uniUnderlying[toIndex]; address toWant = univ2Factory.getPair(weth, toUnderlying); bytes memory data0 = _get_curve_remove_liquidity_data( curvePool, curveLps[fromIndex], fromUnderlyingIndex ); bytes memory data1 = _get_primitive_to_lp_data( fromUnderlying, toWant, treasury ); _test_curve_uni_swap( fromIndex, toIndex, amount, _getDynamicArray( payable(address(curveProxyLogic)), payable(address(uniswapV2ProxyLogic)) ), _getDynamicArray(data0, data1) ); } function test_jar_converter_curve_uni_1_1() public { uint256 fromIndex = 1; uint256 toIndex = 1; uint256 amount = 400e18; address fromUnderlying = dai; int128 fromUnderlyingIndex = 0; address curvePool = susdv2_deposit; // curvePools[fromIndex]; address toUnderlying = uniUnderlying[toIndex]; address toWant = univ2Factory.getPair(weth, toUnderlying); bytes memory data0 = _get_curve_remove_liquidity_data( curvePool, curveLps[fromIndex], fromUnderlyingIndex ); bytes memory data1 = _get_primitive_to_lp_data( fromUnderlying, toWant, treasury ); _test_curve_uni_swap( fromIndex, toIndex, amount, _getDynamicArray( payable(address(curveProxyLogic)), payable(address(uniswapV2ProxyLogic)) ), _getDynamicArray(data0, data1) ); } function test_jar_converter_curve_uni_1_2() public { uint256 fromIndex = 1; uint256 toIndex = 2; uint256 amount = 400e18; address fromUnderlying = dai; int128 fromUnderlyingIndex = 0; address curvePool = susdv2_deposit; // curvePools[fromIndex]; address toUnderlying = uniUnderlying[toIndex]; address toWant = univ2Factory.getPair(weth, toUnderlying); bytes memory data0 = _get_curve_remove_liquidity_data( curvePool, curveLps[fromIndex], fromUnderlyingIndex ); bytes memory data1 = _get_primitive_to_lp_data( fromUnderlying, toWant, treasury ); _test_curve_uni_swap( fromIndex, toIndex, amount, _getDynamicArray( payable(address(curveProxyLogic)), payable(address(uniswapV2ProxyLogic)) ), _getDynamicArray(data0, data1) ); } function test_jar_converter_curve_uni_1_3() public { uint256 fromIndex = 1; uint256 toIndex = 3; uint256 amount = 400e18; address fromUnderlying = dai; int128 fromUnderlyingIndex = 0; address curvePool = susdv2_deposit; // curvePools[fromIndex]; address toUnderlying = uniUnderlying[toIndex]; address toWant = univ2Factory.getPair(weth, toUnderlying); bytes memory data0 = _get_curve_remove_liquidity_data( curvePool, curveLps[fromIndex], fromUnderlyingIndex ); bytes memory data1 = _get_primitive_to_lp_data( fromUnderlying, toWant, treasury ); _test_curve_uni_swap( fromIndex, toIndex, amount, _getDynamicArray( payable(address(curveProxyLogic)), payable(address(uniswapV2ProxyLogic)) ), _getDynamicArray(data0, data1) ); } function test_jar_converter_curve_uni_2_3() public { uint256 fromIndex = 2; uint256 toIndex = 3; uint256 amount = 4e6; address fromUnderlying = wbtc; int128 fromUnderlyingIndex = 1; address curvePool = curvePools[fromIndex]; address toUnderlying = uniUnderlying[toIndex]; address toWant = univ2Factory.getPair(weth, toUnderlying); bytes memory data0 = _get_curve_remove_liquidity_data( curvePool, curveLps[fromIndex], fromUnderlyingIndex ); bytes memory data1 = _get_primitive_to_lp_data( fromUnderlying, toWant, treasury ); _test_curve_uni_swap( fromIndex, toIndex, amount, _getDynamicArray( payable(address(curveProxyLogic)), payable(address(uniswapV2ProxyLogic)) ), _getDynamicArray(data0, data1) ); } } contract StrategyUniCurveJarSwapTest is DSTestDefiBase { address governance; address strategist; address devfund; address treasury; address timelock; IStrategy[] curveStrategies; IStrategy[] uniStrategies; PickleJar[] curvePickleJars; PickleJar[] uniPickleJars; ControllerV4 controller; CurveProxyLogic curveProxyLogic; UniswapV2ProxyLogic uniswapV2ProxyLogic; address[] curvePools; address[] curveLps; address[] uniUnderlying; // Contract wide variable to avoid stack too deep errors uint256 temp; function setUp() public { governance = address(this); strategist = address(this); devfund = address(new User()); treasury = address(new User()); timelock = address(this); controller = new ControllerV4( governance, strategist, timelock, devfund, treasury ); // Curve Strategies curveStrategies = new IStrategy[](3); curvePickleJars = new PickleJar[](curveStrategies.length); curveLps = new address[](curveStrategies.length); curvePools = new address[](curveStrategies.length); curveLps[0] = three_crv; curvePools[0] = three_pool; curveStrategies[0] = IStrategy( address( new StrategyCurve3CRVv2( governance, strategist, address(controller), timelock ) ) ); curveLps[1] = scrv; curvePools[1] = susdv2_pool; curveStrategies[1] = IStrategy( address( new StrategyCurveSCRVv3_2( governance, strategist, address(controller), timelock ) ) ); curveLps[2] = ren_crv; curvePools[2] = ren_pool; curveStrategies[2] = IStrategy( address( new StrategyCurveRenCRVv2( governance, strategist, address(controller), timelock ) ) ); // Create PICKLE Jars for (uint256 i = 0; i < curvePickleJars.length; i++) { curvePickleJars[i] = new PickleJar( curveStrategies[i].want(), governance, timelock, address(controller) ); controller.setJar( curveStrategies[i].want(), address(curvePickleJars[i]) ); controller.approveStrategy( curveStrategies[i].want(), address(curveStrategies[i]) ); controller.setStrategy( curveStrategies[i].want(), address(curveStrategies[i]) ); } // Uni strategies uniStrategies = new IStrategy[](4); uniUnderlying = new address[](uniStrategies.length); uniPickleJars = new PickleJar[](uniStrategies.length); uniUnderlying[0] = dai; uniStrategies[0] = IStrategy( address( new StrategyUniEthDaiLpV4( governance, strategist, address(controller), timelock ) ) ); uniUnderlying[1] = usdc; uniStrategies[1] = IStrategy( address( new StrategyUniEthUsdcLpV4( governance, strategist, address(controller), timelock ) ) ); uniUnderlying[2] = usdt; uniStrategies[2] = IStrategy( address( new StrategyUniEthUsdtLpV4( governance, strategist, address(controller), timelock ) ) ); uniUnderlying[3] = wbtc; uniStrategies[3] = IStrategy( address( new StrategyUniEthWBtcLpV2( governance, strategist, address(controller), timelock ) ) ); for (uint256 i = 0; i < uniStrategies.length; i++) { uniPickleJars[i] = new PickleJar( uniStrategies[i].want(), governance, timelock, address(controller) ); controller.setJar( uniStrategies[i].want(), address(uniPickleJars[i]) ); controller.approveStrategy( uniStrategies[i].want(), address(uniStrategies[i]) ); controller.setStrategy( uniStrategies[i].want(), address(uniStrategies[i]) ); } curveProxyLogic = new CurveProxyLogic(); uniswapV2ProxyLogic = new UniswapV2ProxyLogic(); controller.approveJarConverter(address(curveProxyLogic)); controller.approveJarConverter(address(uniswapV2ProxyLogic)); hevm.warp(startTime); } function _getUniLP( address lp, uint256 ethAmount, uint256 otherAmount ) internal { IUniswapV2Pair fromPair = IUniswapV2Pair(lp); address other = fromPair.token0() != weth ? fromPair.token0() : fromPair.token1(); _getERC20(other, otherAmount); uint256 _other = IERC20(other).balanceOf(address(this)); IERC20(other).safeApprove(address(univ2), 0); IERC20(other).safeApprove(address(univ2), _other); univ2.addLiquidityETH{value: ethAmount}( other, _other, 0, 0, address(this), now + 60 ); } function _get_uniswap_remove_liquidity_data(address pair) internal pure returns (bytes memory) { return abi.encodeWithSignature("removeLiquidity(address)", pair); } function _get_uniswap_lp_tokens_to_primitive(address from, address to) internal pure returns (bytes memory) { return abi.encodeWithSignature( "lpTokensToPrimitive(address,address)", from, to ); } function _get_curve_add_liquidity_data( address curve, bytes4 curveFunctionSig, uint256 curvePoolSize, uint256 curveUnderlyingIndex, address underlying ) internal pure returns (bytes memory) { return abi.encodeWithSignature( "add_liquidity(address,bytes4,uint256,uint256,address)", curve, curveFunctionSig, curvePoolSize, curveUnderlyingIndex, underlying ); } // Some post swap checks // Checks if there's any leftover funds in the converter contract function _post_swap_check(uint256 fromIndex, uint256 toIndex) internal { IERC20 token0 = uniPickleJars[fromIndex].token(); IERC20 token1 = curvePickleJars[toIndex].token(); // No funds left behind assertEq(uniPickleJars[fromIndex].balanceOf(address(controller)), 0); assertEq(curvePickleJars[toIndex].balanceOf(address(controller)), 0); assertEq(token0.balanceOf(address(controller)), 0); assertEq(token1.balanceOf(address(controller)), 0); assertEq(IERC20(wbtc).balanceOf(address(controller)), 0); // assertEq(IERC20(usdt).balanceOf(address(controller)), 0); // assertEq(IERC20(usdc).balanceOf(address(controller)), 0); // assertEq(IERC20(susd).balanceOf(address(controller)), 0); // assertEq(IERC20(dai).balanceOf(address(controller)), 0); // No balance left behind! assertEq(token1.balanceOf(address(this)), 0); // Make sure only controller can call 'withdrawForSwap' try uniStrategies[fromIndex].withdrawForSwap(0) { revert("!withdraw-for-swap-only-controller"); } catch {} } function _test_check_treasury_fee(uint256 _amount, uint256 earned) internal { assertEqApprox( _amount.mul(controller.convenienceFee()).div( controller.convenienceFeeMax() ), earned.mul(2) ); } function _test_swap_and_check_balances( address fromPickleJar, address toPickleJar, address fromPickleJarUnderlying, uint256 fromPickleJarUnderlyingAmount, address payable[] memory targets, bytes[] memory data ) internal { uint256 _beforeTo = IERC20(toPickleJar).balanceOf(address(this)); uint256 _beforeFrom = IERC20(fromPickleJar).balanceOf(address(this)); uint256 _beforeDev = IERC20(fromPickleJarUnderlying).balanceOf(devfund); uint256 _beforeTreasury = IERC20(fromPickleJarUnderlying).balanceOf( treasury ); uint256 _ret = controller.swapExactJarForJar( fromPickleJar, toPickleJar, fromPickleJarUnderlyingAmount, 0, // Min receive amount targets, data ); uint256 _afterTo = IERC20(toPickleJar).balanceOf(address(this)); uint256 _afterFrom = IERC20(fromPickleJar).balanceOf(address(this)); uint256 _afterDev = IERC20(fromPickleJarUnderlying).balanceOf(devfund); uint256 _afterTreasury = IERC20(fromPickleJarUnderlying).balanceOf( treasury ); uint256 treasuryEarned = _afterTreasury.sub(_beforeTreasury); assertEq(treasuryEarned, _afterDev.sub(_beforeDev)); assertTrue(treasuryEarned > 0); _test_check_treasury_fee(fromPickleJarUnderlyingAmount, treasuryEarned); assertTrue(_afterFrom < _beforeFrom); assertTrue(_afterTo > _beforeTo); assertTrue(_afterTo.sub(_beforeTo) > 0); assertEq(_afterTo.sub(_beforeTo), _ret); assertEq(_afterFrom, 0); } function _test_uni_curve_swap( uint256 fromIndex, uint256 toIndex, uint256 amount, address payable[] memory targets, bytes[] memory data ) internal { // Deposit into PickleJars address from = address(uniPickleJars[fromIndex].token()); _getUniLP(from, 1e18, amount); uint256 _from = IERC20(from).balanceOf(address(this)); IERC20(from).approve(address(uniPickleJars[fromIndex]), _from); uniPickleJars[fromIndex].deposit(_from); uniPickleJars[fromIndex].earn(); // Swap! uint256 _fromPickleJar = IERC20(address(uniPickleJars[fromIndex])) .balanceOf(address(this)); IERC20(address(uniPickleJars[fromIndex])).approve( address(controller), _fromPickleJar ); // Check minimum amount try controller.swapExactJarForJar( address(uniPickleJars[fromIndex]), address(curvePickleJars[toIndex]), _fromPickleJar, uint256(-1), // Min receive amount targets, data ) { revert("min-amount-should-fail"); } catch {} _test_swap_and_check_balances( address(uniPickleJars[fromIndex]), address(curvePickleJars[toIndex]), from, _fromPickleJar, targets, data ); _post_swap_check(fromIndex, toIndex); } // **** Tests **** // function test_jar_converter_uni_curve_0_0() public { uint256 fromIndex = 0; uint256 toIndex = 0; uint256 amount = 400e18; address fromUnderlying = uniUnderlying[fromIndex]; address curvePool = curvePools[toIndex]; uint256 curvePoolSize = 3; address curveUnderlying = dai; uint256 curveUnderlyingIndex = 0; bytes4 curveFunctionSig = _getFunctionSig( "add_liquidity(uint256[3],uint256)" ); bytes memory data0 = _get_uniswap_lp_tokens_to_primitive( univ2Factory.getPair(weth, fromUnderlying), curveUnderlying ); bytes memory data1 = _get_curve_add_liquidity_data( curvePool, curveFunctionSig, curvePoolSize, curveUnderlyingIndex, curveUnderlying ); _test_uni_curve_swap( fromIndex, toIndex, amount, _getDynamicArray( payable(address(uniswapV2ProxyLogic)), payable(address(curveProxyLogic)) ), _getDynamicArray(data0, data1) ); } function test_jar_converter_uni_curve_1_0() public { uint256 fromIndex = 1; uint256 toIndex = 0; uint256 amount = 400e6; address fromUnderlying = uniUnderlying[fromIndex]; address curvePool = curvePools[toIndex]; uint256 curvePoolSize = 3; address curveUnderlying = dai; uint256 curveUnderlyingIndex = 0; bytes4 curveFunctionSig = _getFunctionSig( "add_liquidity(uint256[3],uint256)" ); bytes memory data0 = _get_uniswap_lp_tokens_to_primitive( univ2Factory.getPair(weth, fromUnderlying), curveUnderlying ); bytes memory data1 = _get_curve_add_liquidity_data( curvePool, curveFunctionSig, curvePoolSize, curveUnderlyingIndex, curveUnderlying ); _test_uni_curve_swap( fromIndex, toIndex, amount, _getDynamicArray( payable(address(uniswapV2ProxyLogic)), payable(address(curveProxyLogic)) ), _getDynamicArray(data0, data1) ); } function test_jar_converter_uni_curve_2_0() public { uint256 fromIndex = 2; uint256 toIndex = 0; uint256 amount = 400e6; address fromUnderlying = uniUnderlying[fromIndex]; address curvePool = curvePools[toIndex]; uint256 curvePoolSize = 3; address curveUnderlying = dai; uint256 curveUnderlyingIndex = 0; bytes4 curveFunctionSig = _getFunctionSig( "add_liquidity(uint256[3],uint256)" ); bytes memory data0 = _get_uniswap_lp_tokens_to_primitive( univ2Factory.getPair(weth, fromUnderlying), curveUnderlying ); bytes memory data1 = _get_curve_add_liquidity_data( curvePool, curveFunctionSig, curvePoolSize, curveUnderlyingIndex, curveUnderlying ); _test_uni_curve_swap( fromIndex, toIndex, amount, _getDynamicArray( payable(address(uniswapV2ProxyLogic)), payable(address(curveProxyLogic)) ), _getDynamicArray(data0, data1) ); } function test_jar_converter_uni_curve_3_0() public { uint256 fromIndex = 3; uint256 toIndex = 0; uint256 amount = 4e6; address fromUnderlying = uniUnderlying[fromIndex]; address curvePool = curvePools[toIndex]; uint256 curvePoolSize = 3; address curveUnderlying = dai; uint256 curveUnderlyingIndex = 0; bytes4 curveFunctionSig = _getFunctionSig( "add_liquidity(uint256[3],uint256)" ); bytes memory data0 = _get_uniswap_lp_tokens_to_primitive( univ2Factory.getPair(weth, fromUnderlying), curveUnderlying ); bytes memory data1 = _get_curve_add_liquidity_data( curvePool, curveFunctionSig, curvePoolSize, curveUnderlyingIndex, curveUnderlying ); _test_uni_curve_swap( fromIndex, toIndex, amount, _getDynamicArray( payable(address(uniswapV2ProxyLogic)), payable(address(curveProxyLogic)) ), _getDynamicArray(data0, data1) ); } function test_jar_converter_uni_curve_0_1() public { uint256 fromIndex = 0; uint256 toIndex = 1; uint256 amount = 400e18; address fromUnderlying = uniUnderlying[fromIndex]; address curvePool = curvePools[toIndex]; uint256 curvePoolSize = 4; address curveUnderlying = usdt; uint256 curveUnderlyingIndex = 2; bytes4 curveFunctionSig = _getFunctionSig( "add_liquidity(uint256[4],uint256)" ); bytes memory data0 = _get_uniswap_lp_tokens_to_primitive( univ2Factory.getPair(weth, fromUnderlying), curveUnderlying ); bytes memory data1 = _get_curve_add_liquidity_data( curvePool, curveFunctionSig, curvePoolSize, curveUnderlyingIndex, curveUnderlying ); _test_uni_curve_swap( fromIndex, toIndex, amount, _getDynamicArray( payable(address(uniswapV2ProxyLogic)), payable(address(curveProxyLogic)) ), _getDynamicArray(data0, data1) ); } function test_jar_converter_uni_curve_1_1() public { uint256 fromIndex = 1; uint256 toIndex = 1; uint256 amount = 400e6; address fromUnderlying = uniUnderlying[fromIndex]; address curvePool = curvePools[toIndex]; uint256 curvePoolSize = 4; address curveUnderlying = usdt; uint256 curveUnderlyingIndex = 2; bytes4 curveFunctionSig = _getFunctionSig( "add_liquidity(uint256[4],uint256)" ); bytes memory data0 = _get_uniswap_lp_tokens_to_primitive( univ2Factory.getPair(weth, fromUnderlying), curveUnderlying ); bytes memory data1 = _get_curve_add_liquidity_data( curvePool, curveFunctionSig, curvePoolSize, curveUnderlyingIndex, curveUnderlying ); _test_uni_curve_swap( fromIndex, toIndex, amount, _getDynamicArray( payable(address(uniswapV2ProxyLogic)), payable(address(curveProxyLogic)) ), _getDynamicArray(data0, data1) ); } function test_jar_converter_uni_curve_2_1() public { uint256 fromIndex = 2; uint256 toIndex = 1; uint256 amount = 400e6; address fromUnderlying = uniUnderlying[fromIndex]; address curvePool = curvePools[toIndex]; uint256 curvePoolSize = 4; address curveUnderlying = usdt; uint256 curveUnderlyingIndex = 2; bytes4 curveFunctionSig = _getFunctionSig( "add_liquidity(uint256[4],uint256)" ); bytes memory data0 = _get_uniswap_lp_tokens_to_primitive( univ2Factory.getPair(weth, fromUnderlying), curveUnderlying ); bytes memory data1 = _get_curve_add_liquidity_data( curvePool, curveFunctionSig, curvePoolSize, curveUnderlyingIndex, curveUnderlying ); _test_uni_curve_swap( fromIndex, toIndex, amount, _getDynamicArray( payable(address(uniswapV2ProxyLogic)), payable(address(curveProxyLogic)) ), _getDynamicArray(data0, data1) ); } function test_jar_converter_uni_curve_3_1() public { uint256 fromIndex = 3; uint256 toIndex = 1; uint256 amount = 4e6; address fromUnderlying = uniUnderlying[fromIndex]; address curvePool = curvePools[toIndex]; uint256 curvePoolSize = 4; address curveUnderlying = usdt; uint256 curveUnderlyingIndex = 2; bytes4 curveFunctionSig = _getFunctionSig( "add_liquidity(uint256[4],uint256)" ); bytes memory data0 = _get_uniswap_lp_tokens_to_primitive( univ2Factory.getPair(weth, fromUnderlying), curveUnderlying ); bytes memory data1 = _get_curve_add_liquidity_data( curvePool, curveFunctionSig, curvePoolSize, curveUnderlyingIndex, curveUnderlying ); _test_uni_curve_swap( fromIndex, toIndex, amount, _getDynamicArray( payable(address(uniswapV2ProxyLogic)), payable(address(curveProxyLogic)) ), _getDynamicArray(data0, data1) ); } function test_jar_converter_uni_curve_4_1() public { uint256 fromIndex = 3; uint256 toIndex = 1; uint256 amount = 4e6; address fromUnderlying = uniUnderlying[fromIndex]; address curvePool = curvePools[toIndex]; uint256 curvePoolSize = 4; address curveUnderlying = usdt; uint256 curveUnderlyingIndex = 2; bytes4 curveFunctionSig = _getFunctionSig( "add_liquidity(uint256[4],uint256)" ); bytes memory data0 = _get_uniswap_lp_tokens_to_primitive( univ2Factory.getPair(weth, fromUnderlying), curveUnderlying ); bytes memory data1 = _get_curve_add_liquidity_data( curvePool, curveFunctionSig, curvePoolSize, curveUnderlyingIndex, curveUnderlying ); _test_uni_curve_swap( fromIndex, toIndex, amount, _getDynamicArray( payable(address(uniswapV2ProxyLogic)), payable(address(curveProxyLogic)) ), _getDynamicArray(data0, data1) ); } function test_jar_converter_uni_curve_0_2() public { uint256 fromIndex = 0; uint256 toIndex = 2; uint256 amount = 400e18; address fromUnderlying = uniUnderlying[fromIndex]; address curvePool = curvePools[toIndex]; uint256 curvePoolSize = 2; address curveUnderlying = wbtc; uint256 curveUnderlyingIndex = 1; bytes4 curveFunctionSig = _getFunctionSig( "add_liquidity(uint256[2],uint256)" ); bytes memory data0 = _get_uniswap_lp_tokens_to_primitive( univ2Factory.getPair(weth, fromUnderlying), curveUnderlying ); bytes memory data1 = _get_curve_add_liquidity_data( curvePool, curveFunctionSig, curvePoolSize, curveUnderlyingIndex, curveUnderlying ); _test_uni_curve_swap( fromIndex, toIndex, amount, _getDynamicArray( payable(address(uniswapV2ProxyLogic)), payable(address(curveProxyLogic)) ), _getDynamicArray(data0, data1) ); } function test_jar_converter_uni_curve_1_2() public { uint256 fromIndex = 1; uint256 toIndex = 2; uint256 amount = 400e6; address fromUnderlying = uniUnderlying[fromIndex]; address curvePool = curvePools[toIndex]; uint256 curvePoolSize = 2; address curveUnderlying = wbtc; uint256 curveUnderlyingIndex = 1; bytes4 curveFunctionSig = _getFunctionSig( "add_liquidity(uint256[2],uint256)" ); bytes memory data0 = _get_uniswap_lp_tokens_to_primitive( univ2Factory.getPair(weth, fromUnderlying), curveUnderlying ); bytes memory data1 = _get_curve_add_liquidity_data( curvePool, curveFunctionSig, curvePoolSize, curveUnderlyingIndex, curveUnderlying ); _test_uni_curve_swap( fromIndex, toIndex, amount, _getDynamicArray( payable(address(uniswapV2ProxyLogic)), payable(address(curveProxyLogic)) ), _getDynamicArray(data0, data1) ); } function test_jar_converter_uni_curve_2_2() public { uint256 fromIndex = 2; uint256 toIndex = 2; uint256 amount = 400e6; address fromUnderlying = uniUnderlying[fromIndex]; address curvePool = curvePools[toIndex]; uint256 curvePoolSize = 2; address curveUnderlying = wbtc; uint256 curveUnderlyingIndex = 1; bytes4 curveFunctionSig = _getFunctionSig( "add_liquidity(uint256[2],uint256)" ); bytes memory data0 = _get_uniswap_lp_tokens_to_primitive( univ2Factory.getPair(weth, fromUnderlying), curveUnderlying ); bytes memory data1 = _get_curve_add_liquidity_data( curvePool, curveFunctionSig, curvePoolSize, curveUnderlyingIndex, curveUnderlying ); _test_uni_curve_swap( fromIndex, toIndex, amount, _getDynamicArray( payable(address(uniswapV2ProxyLogic)), payable(address(curveProxyLogic)) ), _getDynamicArray(data0, data1) ); } function test_jar_converter_uni_curve_3_2() public { uint256 fromIndex = 3; uint256 toIndex = 2; uint256 amount = 4e6; address fromUnderlying = uniUnderlying[fromIndex]; address curvePool = curvePools[toIndex]; uint256 curvePoolSize = 2; address curveUnderlying = wbtc; uint256 curveUnderlyingIndex = 1; bytes4 curveFunctionSig = _getFunctionSig( "add_liquidity(uint256[2],uint256)" ); bytes memory data0 = _get_uniswap_lp_tokens_to_primitive( univ2Factory.getPair(weth, fromUnderlying), curveUnderlying ); bytes memory data1 = _get_curve_add_liquidity_data( curvePool, curveFunctionSig, curvePoolSize, curveUnderlyingIndex, curveUnderlying ); _test_uni_curve_swap( fromIndex, toIndex, amount, _getDynamicArray( payable(address(uniswapV2ProxyLogic)), payable(address(curveProxyLogic)) ), _getDynamicArray(data0, data1) ); } } contract StrategyUniUniJarSwapTest is DSTestDefiBase { address governance; address strategist; address devfund; address treasury; address timelock; IStrategy[] uniStrategies; PickleJar[] uniPickleJars; ControllerV4 controller; CurveProxyLogic curveProxyLogic; UniswapV2ProxyLogic uniswapV2ProxyLogic; address[] uniUnderlying; function setUp() public { governance = address(this); strategist = address(this); devfund = address(new User()); treasury = address(new User()); timelock = address(this); controller = new ControllerV4( governance, strategist, timelock, devfund, treasury ); // Uni strategies uniStrategies = new IStrategy[](4); uniUnderlying = new address[](uniStrategies.length); uniPickleJars = new PickleJar[](uniStrategies.length); uniUnderlying[0] = dai; uniStrategies[0] = IStrategy( address( new StrategyUniEthDaiLpV4( governance, strategist, address(controller), timelock ) ) ); uniUnderlying[1] = usdc; uniStrategies[1] = IStrategy( address( new StrategyUniEthUsdcLpV4( governance, strategist, address(controller), timelock ) ) ); uniUnderlying[2] = usdt; uniStrategies[2] = IStrategy( address( new StrategyUniEthUsdtLpV4( governance, strategist, address(controller), timelock ) ) ); uniUnderlying[3] = wbtc; uniStrategies[3] = IStrategy( address( new StrategyUniEthWBtcLpV2( governance, strategist, address(controller), timelock ) ) ); for (uint256 i = 0; i < uniStrategies.length; i++) { uniPickleJars[i] = new PickleJar( uniStrategies[i].want(), governance, timelock, address(controller) ); controller.setJar( uniStrategies[i].want(), address(uniPickleJars[i]) ); controller.approveStrategy( uniStrategies[i].want(), address(uniStrategies[i]) ); controller.setStrategy( uniStrategies[i].want(), address(uniStrategies[i]) ); } curveProxyLogic = new CurveProxyLogic(); uniswapV2ProxyLogic = new UniswapV2ProxyLogic(); controller.approveJarConverter(address(curveProxyLogic)); controller.approveJarConverter(address(uniswapV2ProxyLogic)); hevm.warp(startTime); } function _getUniLP( address lp, uint256 ethAmount, uint256 otherAmount ) internal { IUniswapV2Pair fromPair = IUniswapV2Pair(lp); address other = fromPair.token0() != weth ? fromPair.token0() : fromPair.token1(); _getERC20(other, otherAmount); uint256 _other = IERC20(other).balanceOf(address(this)); IERC20(other).safeApprove(address(univ2), 0); IERC20(other).safeApprove(address(univ2), _other); univ2.addLiquidityETH{value: ethAmount}( other, _other, 0, 0, address(this), now + 60 ); } function _get_swap_lp_data( address from, address to, address dustRecipient ) internal pure returns (bytes memory) { return abi.encodeWithSignature( "swapUniLPTokens(address,address,address)", from, to, dustRecipient ); } function _post_swap_check(uint256 fromIndex, uint256 toIndex) internal { IERC20 token0 = uniPickleJars[fromIndex].token(); IERC20 token1 = uniPickleJars[toIndex].token(); uint256 MAX_DUST = 10; // No funds left behind assertEq(uniPickleJars[fromIndex].balanceOf(address(controller)), 0); assertEq(uniPickleJars[toIndex].balanceOf(address(controller)), 0); assertTrue(token0.balanceOf(address(controller)) < MAX_DUST); assertTrue(token1.balanceOf(address(controller)) < MAX_DUST); // Make sure only controller can call 'withdrawForSwap' try uniStrategies[fromIndex].withdrawForSwap(0) { revert("!withdraw-for-swap-only-controller"); } catch {} } function _test_check_treasury_fee(uint256 _amount, uint256 earned) internal { assertEqApprox( _amount.mul(controller.convenienceFee()).div( controller.convenienceFeeMax() ), earned.mul(2) ); } function _test_swap_and_check_balances( address fromPickleJar, address toPickleJar, address fromPickleJarUnderlying, uint256 fromPickleJarUnderlyingAmount, address payable[] memory targets, bytes[] memory data ) internal { uint256 _beforeTo = IERC20(toPickleJar).balanceOf(address(this)); uint256 _beforeFrom = IERC20(fromPickleJar).balanceOf(address(this)); uint256 _beforeDev = IERC20(fromPickleJarUnderlying).balanceOf(devfund); uint256 _beforeTreasury = IERC20(fromPickleJarUnderlying).balanceOf( treasury ); uint256 _ret = controller.swapExactJarForJar( fromPickleJar, toPickleJar, fromPickleJarUnderlyingAmount, 0, // Min receive amount targets, data ); uint256 _afterTo = IERC20(toPickleJar).balanceOf(address(this)); uint256 _afterFrom = IERC20(fromPickleJar).balanceOf(address(this)); uint256 _afterDev = IERC20(fromPickleJarUnderlying).balanceOf(devfund); uint256 _afterTreasury = IERC20(fromPickleJarUnderlying).balanceOf( treasury ); uint256 treasuryEarned = _afterTreasury.sub(_beforeTreasury); assertEq(treasuryEarned, _afterDev.sub(_beforeDev)); assertTrue(treasuryEarned > 0); _test_check_treasury_fee(fromPickleJarUnderlyingAmount, treasuryEarned); assertTrue(_afterFrom < _beforeFrom); assertTrue(_afterTo > _beforeTo); assertTrue(_afterTo.sub(_beforeTo) > 0); assertEq(_afterTo.sub(_beforeTo), _ret); assertEq(_afterFrom, 0); } function _test_uni_uni( uint256 fromIndex, uint256 toIndex, uint256 amount, address payable[] memory targets, bytes[] memory data ) internal { address from = address(uniPickleJars[fromIndex].token()); _getUniLP(from, 1e18, amount); uint256 _from = IERC20(from).balanceOf(address(this)); IERC20(from).approve(address(uniPickleJars[fromIndex]), _from); uniPickleJars[fromIndex].deposit(_from); uniPickleJars[fromIndex].earn(); // Swap! uint256 _fromPickleJar = IERC20(address(uniPickleJars[fromIndex])) .balanceOf(address(this)); IERC20(address(uniPickleJars[fromIndex])).approve( address(controller), _fromPickleJar ); // Check minimum amount try controller.swapExactJarForJar( address(uniPickleJars[fromIndex]), address(uniPickleJars[toIndex]), _fromPickleJar, uint256(-1), // Min receive amount targets, data ) { revert("min-amount-should-fail"); } catch {} _test_swap_and_check_balances( address(uniPickleJars[fromIndex]), address(uniPickleJars[toIndex]), from, _fromPickleJar, targets, data ); _post_swap_check(fromIndex, toIndex); } // **** Tests **** function test_jar_converter_uni_uni_0() public { uint256 fromIndex = 0; uint256 toIndex = 1; uint256 amount = 400e18; address fromUnderlying = uniUnderlying[fromIndex]; address from = univ2Factory.getPair(weth, fromUnderlying); address toUnderlying = uniUnderlying[toIndex]; address to = univ2Factory.getPair(weth, toUnderlying); _test_uni_uni( fromIndex, toIndex, amount, _getDynamicArray(payable(address(uniswapV2ProxyLogic))), _getDynamicArray(_get_swap_lp_data(from, to, treasury)) ); } function test_jar_converter_uni_uni_1() public { uint256 fromIndex = 0; uint256 toIndex = 2; uint256 amount = 400e18; address fromUnderlying = uniUnderlying[fromIndex]; address from = univ2Factory.getPair(weth, fromUnderlying); address toUnderlying = uniUnderlying[toIndex]; address to = univ2Factory.getPair(weth, toUnderlying); _test_uni_uni( fromIndex, toIndex, amount, _getDynamicArray(payable(address(uniswapV2ProxyLogic))), _getDynamicArray(_get_swap_lp_data(from, to, treasury)) ); } function test_jar_converter_uni_uni_2() public { uint256 fromIndex = 2; uint256 toIndex = 3; uint256 amount = 400e6; address fromUnderlying = uniUnderlying[fromIndex]; address from = univ2Factory.getPair(weth, fromUnderlying); address toUnderlying = uniUnderlying[toIndex]; address to = univ2Factory.getPair(weth, toUnderlying); _test_uni_uni( fromIndex, toIndex, amount, _getDynamicArray(payable(address(uniswapV2ProxyLogic))), _getDynamicArray(_get_swap_lp_data(from, to, treasury)) ); } function test_jar_converter_uni_uni_3() public { uint256 fromIndex = 3; uint256 toIndex = 2; uint256 amount = 4e6; address fromUnderlying = uniUnderlying[fromIndex]; address from = univ2Factory.getPair(weth, fromUnderlying); address toUnderlying = uniUnderlying[toIndex]; address to = univ2Factory.getPair(weth, toUnderlying); _test_uni_uni( fromIndex, toIndex, amount, _getDynamicArray(payable(address(uniswapV2ProxyLogic))), _getDynamicArray(_get_swap_lp_data(from, to, treasury)) ); } }

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{"success": true, "error": null, "results": {"detectors": [{"check": "uninitialized-state", "impact": "High", "confidence": "High"}, {"check": "divide-before-multiply", "impact": "Medium", "confidence": "Medium"}, {"check": "reentrancy-no-eth", "impact": "Medium", "confidence": "Medium"}, {"check": "name-reused", "impact": "High", "confidence": "High"}, {"check": "arbitrary-send", "impact": "High", "confidence": "Medium"}, {"check": "erc20-interface", "impact": "Medium", "confidence": "High"}, {"check": "incorrect-equality", "impact": "Medium", "confidence": "High"}, {"check": "reentrancy-eth", "impact": "High", "confidence": "Medium"}, {"check": "unchecked-transfer", "impact": "High", "confidence": "Medium"}, {"check": "unused-return", "impact": "Medium", "confidence": "Medium"}]}}

0x68e9b096b463d0055ac09ff7d94762853a03d05c

pragma solidity 0.7.0; library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // This method relies in extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. uint256 size; // solhint-disable-next-line no-inline-assembly assembly { size := extcodesize(account) } return size > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain`call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return _functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); return _functionCallWithValue(target, data, value, errorMessage); } function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) { require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: weiValue }(data); if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } abstract contract Context { function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } abstract contract ERC20 is Context, IERC20 { using SafeMath for uint256; using Address for address; mapping (address => uint256) private _balances; mapping (address => mapping (address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; uint8 private _decimals; /** * @dev Sets the values for {name} and {symbol}, initializes {decimals} with * a default value of 18. * * To select a different value for {decimals}, use {_setupDecimals}. * * All three of these values are immutable: they can only be set once during * construction. */ constructor (string memory name, string memory symbol,uint8 decimals) { _name = name; _symbol = symbol; _decimals = decimals; } /** * @dev Returns the name of the token. */ function name() public view returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5,05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is * called. * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view returns (uint8) { return _decimals; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `recipient` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address recipient, uint256 amount) public virtual override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { _approve(_msgSender(), spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}; * * Requirements: * - `sender` and `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. * - the caller must have allowance for ``sender``'s tokens of at least * `amount`. */ function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) { _transfer(sender, recipient, amount); _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance")); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue)); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero")); return true; } /** * @dev Moves tokens `amount` from `sender` to `recipient`. * * This is internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `sender` cannot be the zero address. * - `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. */ function _transfer(address sender, address recipient, uint256 amount) internal virtual { require(sender != address(0), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(sender, recipient, amount); _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance"); _balances[recipient] = _balances[recipient].add(amount); emit Transfer(sender, recipient, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements * * - `to` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply = _totalSupply.add(amount); _balances[account] = _balances[account].add(amount); emit Transfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance"); _totalSupply = _totalSupply.sub(amount); emit Transfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens. * * This is internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve(address owner, address spender, uint256 amount) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Sets {decimals} to a value other than the default one of 18. * * WARNING: This function should only be called from the constructor. Most * applications that interact with token contracts will not expect * {decimals} to ever change, and may work incorrectly if it does. */ function _setupDecimals(uint8 decimals_) internal { _decimals = decimals_; } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be to transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { } } contract DefiDao is ERC20 { using SafeMath for uint256; using Address for address; address private _owner; address payable private _auctionContract; //拍卖主合约的地址 /** * @dev Sets the value of the `cap`. This value is immutable, it can only be * set once during construction. */ constructor (string memory name, string memory symbol,uint8 decimals, uint256 totalSupply) ERC20(name,symbol,decimals) public { _mint(_msgSender(),totalSupply); } }

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0x694e4f136d97652e74548665058bb0cab965de8d

pragma solidity 0.4.24; contract ERC20Basic { function totalSupply() public view returns (uint256); function balanceOf(address _who) public view returns (uint256); function transfer(address _to, uint256 _value) public returns (bool); event Transfer(address indexed from, address indexed to, uint256 value); } contract Ownable { address public owner; event OwnershipRenounced(address indexed previousOwner); event OwnershipTransferred( address indexed previousOwner, address indexed newOwner ); /** * @dev The Ownable constructor sets the original `owner` of the contract to the sender * account. */ constructor() public { owner = msg.sender; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(msg.sender == owner); _; } /** * @dev Allows the current owner to relinquish control of the contract. * @notice Renouncing to ownership will leave the contract without an owner. * It will not be possible to call the functions with the `onlyOwner` * modifier anymore. */ function renounceOwnership() public onlyOwner { emit OwnershipRenounced(owner); owner = address(0); } /** * @dev Allows the current owner to transfer control of the contract to a newOwner. * @param _newOwner The address to transfer ownership to. */ function transferOwnership(address _newOwner) public onlyOwner { _transferOwnership(_newOwner); } /** * @dev Transfers control of the contract to a newOwner. * @param _newOwner The address to transfer ownership to. */ function _transferOwnership(address _newOwner) internal { require(_newOwner != address(0)); emit OwnershipTransferred(owner, _newOwner); owner = _newOwner; } } library SafeMath { /** * @dev Multiplies two numbers, throws on overflow. */ function mul(uint256 _a, uint256 _b) internal pure returns (uint256 c) { // Gas optimization: this is cheaper than asserting 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522 if (_a == 0) { return 0; } c = _a * _b; assert(c / _a == _b); return c; } /** * @dev Integer division of two numbers, truncating the quotient. */ function div(uint256 _a, uint256 _b) internal pure returns (uint256) { // assert(_b > 0); // Solidity automatically throws when dividing by 0 // uint256 c = _a / _b; // assert(_a == _b * c + _a % _b); // There is no case in which this doesn't hold return _a / _b; } /** * @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend). */ function sub(uint256 _a, uint256 _b) internal pure returns (uint256) { assert(_b <= _a); return _a - _b; } /** * @dev Adds two numbers, throws on overflow. */ function add(uint256 _a, uint256 _b) internal pure returns (uint256 c) { c = _a + _b; assert(c >= _a); return c; } } contract BasicToken is ERC20Basic { using SafeMath for uint256; mapping(address => uint256) internal balances; uint256 internal totalSupply_; /** * @dev Total number of tokens in existence */ function totalSupply() public view returns (uint256) { return totalSupply_; } /** * @dev Transfer token for a specified address * @param _to The address to transfer to. * @param _value The amount to be transferred. */ function transfer(address _to, uint256 _value) public returns (bool) { require(_value <= balances[msg.sender]); require(_to != address(0)); balances[msg.sender] = balances[msg.sender].sub(_value); balances[_to] = balances[_to].add(_value); emit Transfer(msg.sender, _to, _value); return true; } /** * @dev Gets the balance of the specified address. * @param _owner The address to query the the balance of. * @return An uint256 representing the amount owned by the passed address. */ function balanceOf(address _owner) public view returns (uint256) { return balances[_owner]; } } contract ERC20 is ERC20Basic { function allowance(address _owner, address _spender) public view returns (uint256); function transferFrom(address _from, address _to, uint256 _value) public returns (bool); function approve(address _spender, uint256 _value) public returns (bool); event Approval( address indexed owner, address indexed spender, uint256 value ); } contract StandardToken is ERC20, BasicToken { mapping (address => mapping (address => uint256)) internal allowed; /** * @dev Transfer tokens from one address to another * @param _from address The address which you want to send tokens from * @param _to address The address which you want to transfer to * @param _value uint256 the amount of tokens to be transferred */ function transferFrom( address _from, address _to, uint256 _value ) public returns (bool) { require(_value <= balances[_from]); require(_value <= allowed[_from][msg.sender]); require(_to != address(0)); balances[_from] = balances[_from].sub(_value); balances[_to] = balances[_to].add(_value); allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value); emit Transfer(_from, _to, _value); return true; } /** * @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender. * Beware that changing an allowance with this method brings the risk that someone may use both the old * and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this * race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * @param _spender The address which will spend the funds. * @param _value The amount of tokens to be spent. */ function approve(address _spender, uint256 _value) public returns (bool) { allowed[msg.sender][_spender] = _value; emit Approval(msg.sender, _spender, _value); return true; } /** * @dev Function to check the amount of tokens that an owner allowed to a spender. * @param _owner address The address which owns the funds. * @param _spender address The address which will spend the funds. * @return A uint256 specifying the amount of tokens still available for the spender. */ function allowance( address _owner, address _spender ) public view returns (uint256) { return allowed[_owner][_spender]; } /** * @dev Increase the amount of tokens that an owner allowed to a spender. * approve should be called when allowed[_spender] == 0. To increment * allowed value is better to use this function to avoid 2 calls (and wait until * the first transaction is mined) * From MonolithDAO Token.sol * @param _spender The address which will spend the funds. * @param _addedValue The amount of tokens to increase the allowance by. */ function increaseApproval( address _spender, uint256 _addedValue ) public returns (bool) { allowed[msg.sender][_spender] = ( allowed[msg.sender][_spender].add(_addedValue)); emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]); return true; } /** * @dev Decrease the amount of tokens that an owner allowed to a spender. * approve should be called when allowed[_spender] == 0. To decrement * allowed value is better to use this function to avoid 2 calls (and wait until * the first transaction is mined) * From MonolithDAO Token.sol * @param _spender The address which will spend the funds. * @param _subtractedValue The amount of tokens to decrease the allowance by. */ function decreaseApproval( address _spender, uint256 _subtractedValue ) public returns (bool) { uint256 oldValue = allowed[msg.sender][_spender]; if (_subtractedValue >= oldValue) { allowed[msg.sender][_spender] = 0; } else { allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue); } emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]); return true; } } contract MintableToken is StandardToken, Ownable { event Mint(address indexed to, uint256 amount); event MintFinished(); bool public mintingFinished = false; modifier canMint() { require(!mintingFinished); _; } modifier hasMintPermission() { require(msg.sender == owner); _; } /** * @dev Function to mint tokens * @param _to The address that will receive the minted tokens. * @param _amount The amount of tokens to mint. * @return A boolean that indicates if the operation was successful. */ function mint( address _to, uint256 _amount ) public hasMintPermission canMint returns (bool) { totalSupply_ = totalSupply_.add(_amount); balances[_to] = balances[_to].add(_amount); emit Mint(_to, _amount); emit Transfer(address(0), _to, _amount); return true; } /** * @dev Function to stop minting new tokens. * @return True if the operation was successful. */ function finishMinting() public onlyOwner canMint returns (bool) { mintingFinished = true; emit MintFinished(); return true; } } contract CappedToken is MintableToken { uint256 public cap; constructor(uint256 _cap) public { require(_cap > 0); cap = _cap; } /** * @dev Function to mint tokens * @param _to The address that will receive the minted tokens. * @param _amount The amount of tokens to mint. * @return A boolean that indicates if the operation was successful. */ function mint( address _to, uint256 _amount ) public returns (bool) { require(totalSupply_.add(_amount) <= cap); return super.mint(_to, _amount); } } contract SPC is CappedToken { string public name = "Spinelcoin"; string public symbol = "SPC"; uint8 public decimals = 18; constructor( uint256 _cap ) public CappedToken( _cap ) { } }

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{"success": true, "error": null, "results": {}}

0x69a04053dA11944001baE2e34C9951891D599209

pragma solidity 0.7.0; interface IOwnershipTransferrable { function transferOwnership(address owner) external; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); } abstract contract Ownable is IOwnershipTransferrable { address private _owner; constructor(address owner) { _owner = owner; emit OwnershipTransferred(address(0), _owner); } function owner() public view returns (address) { return _owner; } modifier onlyOwner() { require(_owner == msg.sender, "Ownable: caller is not the owner"); _; } function transferOwnership(address newOwner) override external onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } } abstract contract ReentrancyGuard { bool private _entered; modifier noReentrancy() { require(!_entered); _entered = true; _; _entered = false; } } library SafeMath { function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a); return c; } function sub(uint256 a, uint256 b) internal pure returns (uint256) { require(b <= a); uint256 c = a - b; return c; } function mul(uint256 a, uint256 b) internal pure returns (uint256) { if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b); return c; } function div(uint256 a, uint256 b) internal pure returns (uint256) { require(b > 0); uint256 c = a / b; return c; } function mod(uint256 a, uint256 b) internal pure returns (uint256) { require(b != 0); return a % b; } } contract Vybe is Ownable { using SafeMath for uint256; uint256 constant UINT256_MAX = ~uint256(0); string private _name; string private _symbol; uint8 private _decimals; uint256 private _totalSupply; mapping(address => uint256) private _balances; mapping(address => mapping(address => uint256)) private _allowances; event Transfer(address indexed from, address indexed to, uint256 value); event Approval(address indexed owner, address indexed spender, uint256 value); constructor() Ownable(msg.sender) { _name = "Vybe"; _symbol = "VYBE"; _decimals = 18; _totalSupply = 2000000 * 1e18; _balances[msg.sender] = _totalSupply; emit Transfer(address(0), msg.sender, _totalSupply); } function name() external view returns (string memory) { return _name; } function symbol() external view returns (string memory) { return _symbol; } function decimals() external view returns (uint8) { return _decimals; } function totalSupply() external view returns (uint256) { return _totalSupply; } function balanceOf(address account) external view returns (uint256) { return _balances[account]; } function allowance(address owner, address spender) external view returns (uint256) { return _allowances[owner][spender]; } function transfer(address recipient, uint256 amount) external returns (bool) { _transfer(msg.sender, recipient, amount); return true; } function approve(address spender, uint256 amount) external returns (bool) { _approve(msg.sender, spender, amount); return true; } function transferFrom(address sender, address recipient, uint256 amount) external returns (bool) { _transfer(sender, recipient, amount); if (_allowances[msg.sender][sender] != UINT256_MAX) { _approve(sender, msg.sender, _allowances[sender][msg.sender].sub(amount)); } return true; } function increaseAllowance(address spender, uint256 addedValue) external returns (bool) { _approve(msg.sender, spender, _allowances[msg.sender][spender].add(addedValue)); return true; } function decreaseAllowance(address spender, uint256 subtractedValue) external returns (bool) { _approve(msg.sender, spender, _allowances[msg.sender][spender].sub(subtractedValue)); return true; } function _transfer(address sender, address recipient, uint256 amount) internal { require(sender != address(0)); require(recipient != address(0)); _balances[sender] = _balances[sender].sub(amount); _balances[recipient] = _balances[recipient].add(amount); emit Transfer(sender, recipient, amount); } function _approve(address owner, address spender, uint256 amount) internal { require(owner != address(0)); require(spender != address(0)); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } function mint(address account, uint256 amount) external onlyOwner { _totalSupply = _totalSupply.add(amount); _balances[account] = _balances[account].add(amount); emit Transfer(address(0), account, amount); } function burn(uint256 amount) external returns (bool) { _balances[msg.sender] = _balances[msg.sender].sub(amount); _totalSupply = _totalSupply.sub(amount); emit Transfer(msg.sender, address(0), amount); return true; } } contract VybeStake is ReentrancyGuard, Ownable { using SafeMath for uint256; uint256 constant UINT256_MAX = ~uint256(0); uint256 constant MONTH = 30 days; Vybe private _VYBE; uint256 _totalStaked; mapping (address => uint256) private _staked; mapping (address => uint256) private _lastClaim; address private _developerFund; event Rewards(address indexed staker, uint256 mintage, uint256 developerFund); event MelodyAdded(address indexed melody); event MelodyRemoved(address indexed melody); constructor(address vybe) Ownable(msg.sender) { _VYBE = Vybe(vybe); _developerFund = msg.sender; } function upgradeDevelopmentFund(address fund) external onlyOwner { _developerFund = fund; } function vybe() external view returns (address) { return address(_VYBE); } function totalStaked() external view returns (uint256) { return _totalStaked; } function staked(address staker) external view returns (uint256) { return _staked[staker]; } function increaseStake(uint256 amount) external { require(_VYBE.transferFrom(msg.sender, address(this), amount)); _totalStaked = _totalStaked.add(amount); if (_staked[msg.sender] == 0) { _lastClaim[msg.sender] = block.timestamp; } _staked[msg.sender] = _staked[msg.sender].add(amount); } function decreaseStake(uint256 amount) external { _staked[msg.sender] = _staked[msg.sender].sub(amount); _totalStaked = _totalStaked.sub(amount); require(_VYBE.transfer(address(msg.sender), amount)); } function _calculateMintage(address staker) private view returns (uint256) { uint256 share = _VYBE.totalSupply().div(20).div(_totalStaked.div(_staked[staker])); uint256 timeElapsed = block.timestamp.sub(_lastClaim[staker]); uint256 mintage = 0; if (timeElapsed > MONTH) { mintage = share.mul(timeElapsed.div(MONTH)); timeElapsed = timeElapsed.mod(MONTH); } if (timeElapsed != 0) { mintage = mintage.add(share.div(MONTH.div(timeElapsed))); } return mintage; } function calculateRewards(address staker) public view returns (uint256) { return _calculateMintage(staker).div(20).mul(19); } function claimRewards() external noReentrancy { uint256 mintage = _calculateMintage(msg.sender); uint256 mintagePiece = mintage.div(20); require(mintagePiece > 0); _lastClaim[msg.sender] = block.timestamp; _VYBE.mint(msg.sender, mintage.sub(mintagePiece)); _VYBE.mint(_developerFund, mintagePiece); emit Rewards(msg.sender, mintage, mintagePiece); } function addMelody(address melody) external onlyOwner { _VYBE.approve(melody, UINT256_MAX); emit MelodyAdded(melody); } function removeMelody(address melody) external onlyOwner { _VYBE.approve(melody, 0); emit MelodyRemoved(melody); } function upgrade(address owned, address upgraded) external onlyOwner { IOwnershipTransferrable(owned).transferOwnership(upgraded); } }

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{"success": true, "error": null, "results": {"detectors": [{"check": "divide-before-multiply", "impact": "Medium", "confidence": "Medium"}, {"check": "unused-return", "impact": "Medium", "confidence": "Medium"}]}}

0x69b87a139f3976912c1db7d0808a9fc7e3ca453f

pragma solidity 0.4.18; interface ConversionRatesInterface { function recordImbalance( ERC20 token, int buyAmount, uint rateUpdateBlock, uint currentBlock ) public; function getRate(ERC20 token, uint currentBlockNumber, bool buy, uint qty) public view returns(uint); } interface ERC20 { function totalSupply() public view returns (uint supply); function balanceOf(address _owner) public view returns (uint balance); function transfer(address _to, uint _value) public returns (bool success); function transferFrom(address _from, address _to, uint _value) public returns (bool success); function approve(address _spender, uint _value) public returns (bool success); function allowance(address _owner, address _spender) public view returns (uint remaining); function decimals() public view returns(uint digits); event Approval(address indexed _owner, address indexed _spender, uint _value); } interface KyberNetworkInterface { function maxGasPrice() public view returns(uint); function getUserCapInWei(address user) public view returns(uint); function getUserCapInTokenWei(address user, ERC20 token) public view returns(uint); function enabled() public view returns(bool); function info(bytes32 id) public view returns(uint); function getExpectedRate(ERC20 src, ERC20 dest, uint srcQty) public view returns (uint expectedRate, uint slippageRate); function tradeWithHint(address trader, ERC20 src, uint srcAmount, ERC20 dest, address destAddress, uint maxDestAmount, uint minConversionRate, address walletId, bytes hint) public payable returns(uint); } interface KyberNetworkProxyInterface { function maxGasPrice() public view returns(uint); function getUserCapInWei(address user) public view returns(uint); function getUserCapInTokenWei(address user, ERC20 token) public view returns(uint); function enabled() public view returns(bool); function info(bytes32 id) public view returns(uint); function getExpectedRate(ERC20 src, ERC20 dest, uint srcQty) public view returns (uint expectedRate, uint slippageRate); function tradeWithHint(ERC20 src, uint srcAmount, ERC20 dest, address destAddress, uint maxDestAmount, uint minConversionRate, address walletId, bytes hint) public payable returns(uint); } interface KyberReserveInterface { function trade( ERC20 srcToken, uint srcAmount, ERC20 destToken, address destAddress, uint conversionRate, bool validate ) public payable returns(bool); function getConversionRate(ERC20 src, ERC20 dest, uint srcQty, uint blockNumber) public view returns(uint); } contract PermissionGroups { address public admin; address public pendingAdmin; mapping(address=>bool) internal operators; mapping(address=>bool) internal alerters; address[] internal operatorsGroup; address[] internal alertersGroup; uint constant internal MAX_GROUP_SIZE = 50; function PermissionGroups() public { admin = msg.sender; } modifier onlyAdmin() { require(msg.sender == admin); _; } modifier onlyOperator() { require(operators[msg.sender]); _; } modifier onlyAlerter() { require(alerters[msg.sender]); _; } function getOperators () external view returns(address[]) { return operatorsGroup; } function getAlerters () external view returns(address[]) { return alertersGroup; } event TransferAdminPending(address pendingAdmin); /** * @dev Allows the current admin to set the pendingAdmin address. * @param newAdmin The address to transfer ownership to. */ function transferAdmin(address newAdmin) public onlyAdmin { require(newAdmin != address(0)); TransferAdminPending(pendingAdmin); pendingAdmin = newAdmin; } /** * @dev Allows the current admin to set the admin in one tx. Useful initial deployment. * @param newAdmin The address to transfer ownership to. */ function transferAdminQuickly(address newAdmin) public onlyAdmin { require(newAdmin != address(0)); TransferAdminPending(newAdmin); AdminClaimed(newAdmin, admin); admin = newAdmin; } event AdminClaimed( address newAdmin, address previousAdmin); /** * @dev Allows the pendingAdmin address to finalize the change admin process. */ function claimAdmin() public { require(pendingAdmin == msg.sender); AdminClaimed(pendingAdmin, admin); admin = pendingAdmin; pendingAdmin = address(0); } event AlerterAdded (address newAlerter, bool isAdd); function addAlerter(address newAlerter) public onlyAdmin { require(!alerters[newAlerter]); // prevent duplicates. require(alertersGroup.length < MAX_GROUP_SIZE); AlerterAdded(newAlerter, true); alerters[newAlerter] = true; alertersGroup.push(newAlerter); } function removeAlerter (address alerter) public onlyAdmin { require(alerters[alerter]); alerters[alerter] = false; for (uint i = 0; i < alertersGroup.length; ++i) { if (alertersGroup[i] == alerter) { alertersGroup[i] = alertersGroup[alertersGroup.length - 1]; alertersGroup.length--; AlerterAdded(alerter, false); break; } } } event OperatorAdded(address newOperator, bool isAdd); function addOperator(address newOperator) public onlyAdmin { require(!operators[newOperator]); // prevent duplicates. require(operatorsGroup.length < MAX_GROUP_SIZE); OperatorAdded(newOperator, true); operators[newOperator] = true; operatorsGroup.push(newOperator); } function removeOperator (address operator) public onlyAdmin { require(operators[operator]); operators[operator] = false; for (uint i = 0; i < operatorsGroup.length; ++i) { if (operatorsGroup[i] == operator) { operatorsGroup[i] = operatorsGroup[operatorsGroup.length - 1]; operatorsGroup.length -= 1; OperatorAdded(operator, false); break; } } } } interface SanityRatesInterface { function getSanityRate(ERC20 src, ERC20 dest) public view returns(uint); } contract Utils { ERC20 constant internal ETH_TOKEN_ADDRESS = ERC20(0x00eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee); uint constant internal PRECISION = (10**18); uint constant internal MAX_QTY = (10**28); // 10B tokens uint constant internal MAX_RATE = (PRECISION * 10**6); // up to 1M tokens per ETH uint constant internal MAX_DECIMALS = 18; uint constant internal ETH_DECIMALS = 18; mapping(address=>uint) internal decimals; function setDecimals(ERC20 token) internal { if (token == ETH_TOKEN_ADDRESS) decimals[token] = ETH_DECIMALS; else decimals[token] = token.decimals(); } function getDecimals(ERC20 token) internal view returns(uint) { if (token == ETH_TOKEN_ADDRESS) return ETH_DECIMALS; // save storage access uint tokenDecimals = decimals[token]; // technically, there might be token with decimals 0 // moreover, very possible that old tokens have decimals 0 // these tokens will just have higher gas fees. if(tokenDecimals == 0) return token.decimals(); return tokenDecimals; } function calcDstQty(uint srcQty, uint srcDecimals, uint dstDecimals, uint rate) internal pure returns(uint) { require(srcQty <= MAX_QTY); require(rate <= MAX_RATE); if (dstDecimals >= srcDecimals) { require((dstDecimals - srcDecimals) <= MAX_DECIMALS); return (srcQty * rate * (10**(dstDecimals - srcDecimals))) / PRECISION; } else { require((srcDecimals - dstDecimals) <= MAX_DECIMALS); return (srcQty * rate) / (PRECISION * (10**(srcDecimals - dstDecimals))); } } function calcSrcQty(uint dstQty, uint srcDecimals, uint dstDecimals, uint rate) internal pure returns(uint) { require(dstQty <= MAX_QTY); require(rate <= MAX_RATE); //source quantity is rounded up. to avoid dest quantity being too low. uint numerator; uint denominator; if (srcDecimals >= dstDecimals) { require((srcDecimals - dstDecimals) <= MAX_DECIMALS); numerator = (PRECISION * dstQty * (10**(srcDecimals - dstDecimals))); denominator = rate; } else { require((dstDecimals - srcDecimals) <= MAX_DECIMALS); numerator = (PRECISION * dstQty); denominator = (rate * (10**(dstDecimals - srcDecimals))); } return (numerator + denominator - 1) / denominator; //avoid rounding down errors } } contract Withdrawable is PermissionGroups { event TokenWithdraw(ERC20 token, uint amount, address sendTo); /** * @dev Withdraw all ERC20 compatible tokens * @param token ERC20 The address of the token contract */ function withdrawToken(ERC20 token, uint amount, address sendTo) external onlyAdmin { require(token.transfer(sendTo, amount)); TokenWithdraw(token, amount, sendTo); } event EtherWithdraw(uint amount, address sendTo); /** * @dev Withdraw Ethers */ function withdrawEther(uint amount, address sendTo) external onlyAdmin { sendTo.transfer(amount); EtherWithdraw(amount, sendTo); } } contract KyberReserve is KyberReserveInterface, Withdrawable, Utils { address public kyberNetwork; bool public tradeEnabled; ConversionRatesInterface public conversionRatesContract; SanityRatesInterface public sanityRatesContract; mapping(bytes32=>bool) public approvedWithdrawAddresses; // sha3(token,address)=>bool mapping(address=>address) public tokenWallet; function KyberReserve(address _kyberNetwork, ConversionRatesInterface _ratesContract, address _admin) public { require(_admin != address(0)); require(_ratesContract != address(0)); require(_kyberNetwork != address(0)); kyberNetwork = _kyberNetwork; conversionRatesContract = _ratesContract; admin = _admin; tradeEnabled = true; } event DepositToken(ERC20 token, uint amount); function() public payable { DepositToken(ETH_TOKEN_ADDRESS, msg.value); } event TradeExecute( address indexed origin, address src, uint srcAmount, address destToken, uint destAmount, address destAddress ); function trade( ERC20 srcToken, uint srcAmount, ERC20 destToken, address destAddress, uint conversionRate, bool validate ) public payable returns(bool) { require(tradeEnabled); require(msg.sender == kyberNetwork); require(doTrade(srcToken, srcAmount, destToken, destAddress, conversionRate, validate)); return true; } event TradeEnabled(bool enable); function enableTrade() public onlyAdmin returns(bool) { tradeEnabled = true; TradeEnabled(true); return true; } function disableTrade() public onlyAlerter returns(bool) { tradeEnabled = false; TradeEnabled(false); return true; } event WithdrawAddressApproved(ERC20 token, address addr, bool approve); function approveWithdrawAddress(ERC20 token, address addr, bool approve) public onlyAdmin { approvedWithdrawAddresses[keccak256(token, addr)] = approve; WithdrawAddressApproved(token, addr, approve); setDecimals(token); if ((tokenWallet[token] == address(0x0)) && (token != ETH_TOKEN_ADDRESS)) { tokenWallet[token] = this; // by default require(token.approve(this, 2 ** 255)); } } event NewTokenWallet(ERC20 token, address wallet); function setTokenWallet(ERC20 token, address wallet) public onlyAdmin { require(wallet != address(0x0)); tokenWallet[token] = wallet; NewTokenWallet(token, wallet); } event WithdrawFunds(ERC20 token, uint amount, address destination); function withdraw(ERC20 token, uint amount, address destination) public onlyOperator returns(bool) { require(approvedWithdrawAddresses[keccak256(token, destination)]); if (token == ETH_TOKEN_ADDRESS) { destination.transfer(amount); } else { require(token.transferFrom(tokenWallet[token], destination, amount)); } WithdrawFunds(token, amount, destination); return true; } event SetContractAddresses(address network, address rate, address sanity); function setContracts( address _kyberNetwork, ConversionRatesInterface _conversionRates, SanityRatesInterface _sanityRates ) public onlyAdmin { require(_kyberNetwork != address(0)); require(_conversionRates != address(0)); kyberNetwork = _kyberNetwork; conversionRatesContract = _conversionRates; sanityRatesContract = _sanityRates; SetContractAddresses(kyberNetwork, conversionRatesContract, sanityRatesContract); } //////////////////////////////////////////////////////////////////////////// /// status functions /////////////////////////////////////////////////////// //////////////////////////////////////////////////////////////////////////// function getBalance(ERC20 token) public view returns(uint) { if (token == ETH_TOKEN_ADDRESS) return this.balance; else { address wallet = tokenWallet[token]; uint balanceOfWallet = token.balanceOf(wallet); uint allowanceOfWallet = token.allowance(wallet, this); return (balanceOfWallet < allowanceOfWallet) ? balanceOfWallet : allowanceOfWallet; } } function getDestQty(ERC20 src, ERC20 dest, uint srcQty, uint rate) public view returns(uint) { uint dstDecimals = getDecimals(dest); uint srcDecimals = getDecimals(src); return calcDstQty(srcQty, srcDecimals, dstDecimals, rate); } function getSrcQty(ERC20 src, ERC20 dest, uint dstQty, uint rate) public view returns(uint) { uint dstDecimals = getDecimals(dest); uint srcDecimals = getDecimals(src); return calcSrcQty(dstQty, srcDecimals, dstDecimals, rate); } function getConversionRate(ERC20 src, ERC20 dest, uint srcQty, uint blockNumber) public view returns(uint) { ERC20 token; bool isBuy; if (!tradeEnabled) return 0; if (ETH_TOKEN_ADDRESS == src) { isBuy = true; token = dest; } else if (ETH_TOKEN_ADDRESS == dest) { isBuy = false; token = src; } else { return 0; // pair is not listed } uint rate = conversionRatesContract.getRate(token, blockNumber, isBuy, srcQty); uint destQty = getDestQty(src, dest, srcQty, rate); if (getBalance(dest) < destQty) return 0; if (sanityRatesContract != address(0)) { uint sanityRate = sanityRatesContract.getSanityRate(src, dest); if (rate > sanityRate) return 0; } return rate; } /// @dev do a trade /// @param srcToken Src token /// @param srcAmount Amount of src token /// @param destToken Destination token /// @param destAddress Destination address to send tokens to /// @param validate If true, additional validations are applicable /// @return true iff trade is successful function doTrade( ERC20 srcToken, uint srcAmount, ERC20 destToken, address destAddress, uint conversionRate, bool validate ) internal returns(bool) { // can skip validation if done at kyber network level if (validate) { require(conversionRate > 0); if (srcToken == ETH_TOKEN_ADDRESS) require(msg.value == srcAmount); else require(msg.value == 0); } uint destAmount = getDestQty(srcToken, destToken, srcAmount, conversionRate); // sanity check require(destAmount > 0); // add to imbalance ERC20 token; int tradeAmount; if (srcToken == ETH_TOKEN_ADDRESS) { tradeAmount = int(destAmount); token = destToken; } else { tradeAmount = -1 * int(srcAmount); token = srcToken; } conversionRatesContract.recordImbalance( token, tradeAmount, 0, block.number ); // collect src tokens if (srcToken != ETH_TOKEN_ADDRESS) { require(srcToken.transferFrom(msg.sender, tokenWallet[srcToken], srcAmount)); } // send dest tokens if (destToken == ETH_TOKEN_ADDRESS) { destAddress.transfer(destAmount); } else { require(destToken.transferFrom(tokenWallet[destToken], destAddress, destAmount)); } TradeExecute(msg.sender, srcToken, srcAmount, destToken, destAmount, destAddress); return true; } } contract SanityRates is SanityRatesInterface, Withdrawable, Utils { mapping(address=>uint) public tokenRate; mapping(address=>uint) public reasonableDiffInBps; function SanityRates(address _admin) public { require(_admin != address(0)); admin = _admin; } function setReasonableDiff(ERC20[] srcs, uint[] diff) public onlyAdmin { require(srcs.length == diff.length); for (uint i = 0; i < srcs.length; i++) { require(diff[i] <= 100 * 100); reasonableDiffInBps[srcs[i]] = diff[i]; } } function setSanityRates(ERC20[] srcs, uint[] rates) public onlyOperator { require(srcs.length == rates.length); for (uint i = 0; i < srcs.length; i++) { require(rates[i] <= MAX_RATE); tokenRate[srcs[i]] = rates[i]; } } function getSanityRate(ERC20 src, ERC20 dest) public view returns(uint) { if (src != ETH_TOKEN_ADDRESS && dest != ETH_TOKEN_ADDRESS) return 0; uint rate; address token; if (src == ETH_TOKEN_ADDRESS) { rate = (PRECISION*PRECISION)/tokenRate[dest]; token = dest; } else { rate = tokenRate[src]; token = src; } return rate * (10000 + reasonableDiffInBps[token])/10000; } } contract VolumeImbalanceRecorder is Withdrawable { uint constant internal SLIDING_WINDOW_SIZE = 5; uint constant internal POW_2_64 = 2 ** 64; struct TokenControlInfo { uint minimalRecordResolution; // can be roughly 1 cent uint maxPerBlockImbalance; // in twei resolution uint maxTotalImbalance; // max total imbalance (between rate updates) // before halting trade } mapping(address => TokenControlInfo) internal tokenControlInfo; struct TokenImbalanceData { int lastBlockBuyUnitsImbalance; uint lastBlock; int totalBuyUnitsImbalance; uint lastRateUpdateBlock; } mapping(address => mapping(uint=>uint)) public tokenImbalanceData; function VolumeImbalanceRecorder(address _admin) public { require(_admin != address(0)); admin = _admin; } function setTokenControlInfo( ERC20 token, uint minimalRecordResolution, uint maxPerBlockImbalance, uint maxTotalImbalance ) public onlyAdmin { tokenControlInfo[token] = TokenControlInfo( minimalRecordResolution, maxPerBlockImbalance, maxTotalImbalance ); } function getTokenControlInfo(ERC20 token) public view returns(uint, uint, uint) { return (tokenControlInfo[token].minimalRecordResolution, tokenControlInfo[token].maxPerBlockImbalance, tokenControlInfo[token].maxTotalImbalance); } function addImbalance( ERC20 token, int buyAmount, uint rateUpdateBlock, uint currentBlock ) internal { uint currentBlockIndex = currentBlock % SLIDING_WINDOW_SIZE; int recordedBuyAmount = int(buyAmount / int(tokenControlInfo[token].minimalRecordResolution)); int prevImbalance = 0; TokenImbalanceData memory currentBlockData = decodeTokenImbalanceData(tokenImbalanceData[token][currentBlockIndex]); // first scenario - this is not the first tx in the current block if (currentBlockData.lastBlock == currentBlock) { if (uint(currentBlockData.lastRateUpdateBlock) == rateUpdateBlock) { // just increase imbalance currentBlockData.lastBlockBuyUnitsImbalance += recordedBuyAmount; currentBlockData.totalBuyUnitsImbalance += recordedBuyAmount; } else { // imbalance was changed in the middle of the block prevImbalance = getImbalanceInRange(token, rateUpdateBlock, currentBlock); currentBlockData.totalBuyUnitsImbalance = int(prevImbalance) + recordedBuyAmount; currentBlockData.lastBlockBuyUnitsImbalance += recordedBuyAmount; currentBlockData.lastRateUpdateBlock = uint(rateUpdateBlock); } } else { // first tx in the current block int currentBlockImbalance; (prevImbalance, currentBlockImbalance) = getImbalanceSinceRateUpdate(token, rateUpdateBlock, currentBlock); currentBlockData.lastBlockBuyUnitsImbalance = recordedBuyAmount; currentBlockData.lastBlock = uint(currentBlock); currentBlockData.lastRateUpdateBlock = uint(rateUpdateBlock); currentBlockData.totalBuyUnitsImbalance = int(prevImbalance) + recordedBuyAmount; } tokenImbalanceData[token][currentBlockIndex] = encodeTokenImbalanceData(currentBlockData); } function setGarbageToVolumeRecorder(ERC20 token) internal { for (uint i = 0; i < SLIDING_WINDOW_SIZE; i++) { tokenImbalanceData[token][i] = 0x1; } } function getImbalanceInRange(ERC20 token, uint startBlock, uint endBlock) internal view returns(int buyImbalance) { // check the imbalance in the sliding window require(startBlock <= endBlock); buyImbalance = 0; for (uint windowInd = 0; windowInd < SLIDING_WINDOW_SIZE; windowInd++) { TokenImbalanceData memory perBlockData = decodeTokenImbalanceData(tokenImbalanceData[token][windowInd]); if (perBlockData.lastBlock <= endBlock && perBlockData.lastBlock >= startBlock) { buyImbalance += int(perBlockData.lastBlockBuyUnitsImbalance); } } } function getImbalanceSinceRateUpdate(ERC20 token, uint rateUpdateBlock, uint currentBlock) internal view returns(int buyImbalance, int currentBlockImbalance) { buyImbalance = 0; currentBlockImbalance = 0; uint latestBlock = 0; int imbalanceInRange = 0; uint startBlock = rateUpdateBlock; uint endBlock = currentBlock; for (uint windowInd = 0; windowInd < SLIDING_WINDOW_SIZE; windowInd++) { TokenImbalanceData memory perBlockData = decodeTokenImbalanceData(tokenImbalanceData[token][windowInd]); if (perBlockData.lastBlock <= endBlock && perBlockData.lastBlock >= startBlock) { imbalanceInRange += perBlockData.lastBlockBuyUnitsImbalance; } if (perBlockData.lastRateUpdateBlock != rateUpdateBlock) continue; if (perBlockData.lastBlock < latestBlock) continue; latestBlock = perBlockData.lastBlock; buyImbalance = perBlockData.totalBuyUnitsImbalance; if (uint(perBlockData.lastBlock) == currentBlock) { currentBlockImbalance = perBlockData.lastBlockBuyUnitsImbalance; } } if (buyImbalance == 0) { buyImbalance = imbalanceInRange; } } function getImbalance(ERC20 token, uint rateUpdateBlock, uint currentBlock) internal view returns(int totalImbalance, int currentBlockImbalance) { int resolution = int(tokenControlInfo[token].minimalRecordResolution); (totalImbalance, currentBlockImbalance) = getImbalanceSinceRateUpdate( token, rateUpdateBlock, currentBlock); totalImbalance *= resolution; currentBlockImbalance *= resolution; } function getMaxPerBlockImbalance(ERC20 token) internal view returns(uint) { return tokenControlInfo[token].maxPerBlockImbalance; } function getMaxTotalImbalance(ERC20 token) internal view returns(uint) { return tokenControlInfo[token].maxTotalImbalance; } function encodeTokenImbalanceData(TokenImbalanceData data) internal pure returns(uint) { // check for overflows require(data.lastBlockBuyUnitsImbalance < int(POW_2_64 / 2)); require(data.lastBlockBuyUnitsImbalance > int(-1 * int(POW_2_64) / 2)); require(data.lastBlock < POW_2_64); require(data.totalBuyUnitsImbalance < int(POW_2_64 / 2)); require(data.totalBuyUnitsImbalance > int(-1 * int(POW_2_64) / 2)); require(data.lastRateUpdateBlock < POW_2_64); // do encoding uint result = uint(data.lastBlockBuyUnitsImbalance) & (POW_2_64 - 1); result |= data.lastBlock * POW_2_64; result |= (uint(data.totalBuyUnitsImbalance) & (POW_2_64 - 1)) * POW_2_64 * POW_2_64; result |= data.lastRateUpdateBlock * POW_2_64 * POW_2_64 * POW_2_64; return result; } function decodeTokenImbalanceData(uint input) internal pure returns(TokenImbalanceData) { TokenImbalanceData memory data; data.lastBlockBuyUnitsImbalance = int(int64(input & (POW_2_64 - 1))); data.lastBlock = uint(uint64((input / POW_2_64) & (POW_2_64 - 1))); data.totalBuyUnitsImbalance = int(int64((input / (POW_2_64 * POW_2_64)) & (POW_2_64 - 1))); data.lastRateUpdateBlock = uint(uint64((input / (POW_2_64 * POW_2_64 * POW_2_64)))); return data; } } contract ConversionRates is ConversionRatesInterface, VolumeImbalanceRecorder, Utils { // bps - basic rate steps. one step is 1 / 10000 of the rate. struct StepFunction { int[] x; // quantity for each step. Quantity of each step includes previous steps. int[] y; // rate change per quantity step in bps. } struct TokenData { bool listed; // was added to reserve bool enabled; // whether trade is enabled // position in the compact data uint compactDataArrayIndex; uint compactDataFieldIndex; // rate data. base and changes according to quantity and reserve balance. // generally speaking. Sell rate is 1 / buy rate i.e. the buy in the other direction. uint baseBuyRate; // in PRECISION units. see KyberConstants uint baseSellRate; // PRECISION units. without (sell / buy) spread it is 1 / baseBuyRate StepFunction buyRateQtyStepFunction; // in bps. higher quantity - bigger the rate. StepFunction sellRateQtyStepFunction;// in bps. higher the qua StepFunction buyRateImbalanceStepFunction; // in BPS. higher reserve imbalance - bigger the rate. StepFunction sellRateImbalanceStepFunction; } /* this is the data for tokenRatesCompactData but solidity compiler optimizer is sub-optimal, and cannot write this structure in a single storage write so we represent it as bytes32 and do the byte tricks ourselves. struct TokenRatesCompactData { bytes14 buy; // change buy rate of token from baseBuyRate in 10 bps bytes14 sell; // change sell rate of token from baseSellRate in 10 bps uint32 blockNumber; } */ uint public validRateDurationInBlocks = 10; // rates are valid for this amount of blocks ERC20[] internal listedTokens; mapping(address=>TokenData) internal tokenData; bytes32[] internal tokenRatesCompactData; uint public numTokensInCurrentCompactData = 0; address public reserveContract; uint constant internal NUM_TOKENS_IN_COMPACT_DATA = 14; uint constant internal BYTES_14_OFFSET = (2 ** (8 * NUM_TOKENS_IN_COMPACT_DATA)); uint constant internal MAX_STEPS_IN_FUNCTION = 10; int constant internal MAX_BPS_ADJUSTMENT = 10 ** 11; // 1B % int constant internal MIN_BPS_ADJUSTMENT = -100 * 100; // cannot go down by more than 100% function ConversionRates(address _admin) public VolumeImbalanceRecorder(_admin) { } // solhint-disable-line no-empty-blocks function addToken(ERC20 token) public onlyAdmin { require(!tokenData[token].listed); tokenData[token].listed = true; listedTokens.push(token); if (numTokensInCurrentCompactData == 0) { tokenRatesCompactData.length++; // add new structure } tokenData[token].compactDataArrayIndex = tokenRatesCompactData.length - 1; tokenData[token].compactDataFieldIndex = numTokensInCurrentCompactData; numTokensInCurrentCompactData = (numTokensInCurrentCompactData + 1) % NUM_TOKENS_IN_COMPACT_DATA; setGarbageToVolumeRecorder(token); setDecimals(token); } function setCompactData(bytes14[] buy, bytes14[] sell, uint blockNumber, uint[] indices) public onlyOperator { require(buy.length == sell.length); require(indices.length == buy.length); require(blockNumber <= 0xFFFFFFFF); uint bytes14Offset = BYTES_14_OFFSET; for (uint i = 0; i < indices.length; i++) { require(indices[i] < tokenRatesCompactData.length); uint data = uint(buy[i]) | uint(sell[i]) * bytes14Offset | (blockNumber * (bytes14Offset * bytes14Offset)); tokenRatesCompactData[indices[i]] = bytes32(data); } } function setBaseRate( ERC20[] tokens, uint[] baseBuy, uint[] baseSell, bytes14[] buy, bytes14[] sell, uint blockNumber, uint[] indices ) public onlyOperator { require(tokens.length == baseBuy.length); require(tokens.length == baseSell.length); require(sell.length == buy.length); require(sell.length == indices.length); for (uint ind = 0; ind < tokens.length; ind++) { require(tokenData[tokens[ind]].listed); tokenData[tokens[ind]].baseBuyRate = baseBuy[ind]; tokenData[tokens[ind]].baseSellRate = baseSell[ind]; } setCompactData(buy, sell, blockNumber, indices); } function setQtyStepFunction( ERC20 token, int[] xBuy, int[] yBuy, int[] xSell, int[] ySell ) public onlyOperator { require(xBuy.length == yBuy.length); require(xSell.length == ySell.length); require(xBuy.length <= MAX_STEPS_IN_FUNCTION); require(xSell.length <= MAX_STEPS_IN_FUNCTION); require(tokenData[token].listed); tokenData[token].buyRateQtyStepFunction = StepFunction(xBuy, yBuy); tokenData[token].sellRateQtyStepFunction = StepFunction(xSell, ySell); } function setImbalanceStepFunction( ERC20 token, int[] xBuy, int[] yBuy, int[] xSell, int[] ySell ) public onlyOperator { require(xBuy.length == yBuy.length); require(xSell.length == ySell.length); require(xBuy.length <= MAX_STEPS_IN_FUNCTION); require(xSell.length <= MAX_STEPS_IN_FUNCTION); require(tokenData[token].listed); tokenData[token].buyRateImbalanceStepFunction = StepFunction(xBuy, yBuy); tokenData[token].sellRateImbalanceStepFunction = StepFunction(xSell, ySell); } function setValidRateDurationInBlocks(uint duration) public onlyAdmin { validRateDurationInBlocks = duration; } function enableTokenTrade(ERC20 token) public onlyAdmin { require(tokenData[token].listed); require(tokenControlInfo[token].minimalRecordResolution != 0); tokenData[token].enabled = true; } function disableTokenTrade(ERC20 token) public onlyAlerter { require(tokenData[token].listed); tokenData[token].enabled = false; } function setReserveAddress(address reserve) public onlyAdmin { reserveContract = reserve; } function recordImbalance( ERC20 token, int buyAmount, uint rateUpdateBlock, uint currentBlock ) public { require(msg.sender == reserveContract); if (rateUpdateBlock == 0) rateUpdateBlock = getRateUpdateBlock(token); return addImbalance(token, buyAmount, rateUpdateBlock, currentBlock); } /* solhint-disable function-max-lines */ function getRate(ERC20 token, uint currentBlockNumber, bool buy, uint qty) public view returns(uint) { // check if trade is enabled if (!tokenData[token].enabled) return 0; if (tokenControlInfo[token].minimalRecordResolution == 0) return 0; // token control info not set // get rate update block bytes32 compactData = tokenRatesCompactData[tokenData[token].compactDataArrayIndex]; uint updateRateBlock = getLast4Bytes(compactData); if (currentBlockNumber >= updateRateBlock + validRateDurationInBlocks) return 0; // rate is expired // check imbalance int totalImbalance; int blockImbalance; (totalImbalance, blockImbalance) = getImbalance(token, updateRateBlock, currentBlockNumber); // calculate actual rate int imbalanceQty; int extraBps; int8 rateUpdate; uint rate; if (buy) { // start with base rate rate = tokenData[token].baseBuyRate; // add rate update rateUpdate = getRateByteFromCompactData(compactData, token, true); extraBps = int(rateUpdate) * 10; rate = addBps(rate, extraBps); // compute token qty qty = getTokenQty(token, rate, qty); imbalanceQty = int(qty); totalImbalance += imbalanceQty; // add qty overhead extraBps = executeStepFunction(tokenData[token].buyRateQtyStepFunction, int(qty)); rate = addBps(rate, extraBps); // add imbalance overhead extraBps = executeStepFunction(tokenData[token].buyRateImbalanceStepFunction, totalImbalance); rate = addBps(rate, extraBps); } else { // start with base rate rate = tokenData[token].baseSellRate; // add rate update rateUpdate = getRateByteFromCompactData(compactData, token, false); extraBps = int(rateUpdate) * 10; rate = addBps(rate, extraBps); // compute token qty imbalanceQty = -1 * int(qty); totalImbalance += imbalanceQty; // add qty overhead extraBps = executeStepFunction(tokenData[token].sellRateQtyStepFunction, int(qty)); rate = addBps(rate, extraBps); // add imbalance overhead extraBps = executeStepFunction(tokenData[token].sellRateImbalanceStepFunction, totalImbalance); rate = addBps(rate, extraBps); } if (abs(totalImbalance) >= getMaxTotalImbalance(token)) return 0; if (abs(blockImbalance + imbalanceQty) >= getMaxPerBlockImbalance(token)) return 0; return rate; } /* solhint-enable function-max-lines */ function getBasicRate(ERC20 token, bool buy) public view returns(uint) { if (buy) return tokenData[token].baseBuyRate; else return tokenData[token].baseSellRate; } function getCompactData(ERC20 token) public view returns(uint, uint, byte, byte) { require(tokenData[token].listed); uint arrayIndex = tokenData[token].compactDataArrayIndex; uint fieldOffset = tokenData[token].compactDataFieldIndex; return ( arrayIndex, fieldOffset, byte(getRateByteFromCompactData(tokenRatesCompactData[arrayIndex], token, true)), byte(getRateByteFromCompactData(tokenRatesCompactData[arrayIndex], token, false)) ); } function getTokenBasicData(ERC20 token) public view returns(bool, bool) { return (tokenData[token].listed, tokenData[token].enabled); } /* solhint-disable code-complexity */ function getStepFunctionData(ERC20 token, uint command, uint param) public view returns(int) { if (command == 0) return int(tokenData[token].buyRateQtyStepFunction.x.length); if (command == 1) return tokenData[token].buyRateQtyStepFunction.x[param]; if (command == 2) return int(tokenData[token].buyRateQtyStepFunction.y.length); if (command == 3) return tokenData[token].buyRateQtyStepFunction.y[param]; if (command == 4) return int(tokenData[token].sellRateQtyStepFunction.x.length); if (command == 5) return tokenData[token].sellRateQtyStepFunction.x[param]; if (command == 6) return int(tokenData[token].sellRateQtyStepFunction.y.length); if (command == 7) return tokenData[token].sellRateQtyStepFunction.y[param]; if (command == 8) return int(tokenData[token].buyRateImbalanceStepFunction.x.length); if (command == 9) return tokenData[token].buyRateImbalanceStepFunction.x[param]; if (command == 10) return int(tokenData[token].buyRateImbalanceStepFunction.y.length); if (command == 11) return tokenData[token].buyRateImbalanceStepFunction.y[param]; if (command == 12) return int(tokenData[token].sellRateImbalanceStepFunction.x.length); if (command == 13) return tokenData[token].sellRateImbalanceStepFunction.x[param]; if (command == 14) return int(tokenData[token].sellRateImbalanceStepFunction.y.length); if (command == 15) return tokenData[token].sellRateImbalanceStepFunction.y[param]; revert(); } /* solhint-enable code-complexity */ function getRateUpdateBlock(ERC20 token) public view returns(uint) { bytes32 compactData = tokenRatesCompactData[tokenData[token].compactDataArrayIndex]; return getLast4Bytes(compactData); } function getListedTokens() public view returns(ERC20[]) { return listedTokens; } function getTokenQty(ERC20 token, uint ethQty, uint rate) internal view returns(uint) { uint dstDecimals = getDecimals(token); uint srcDecimals = ETH_DECIMALS; return calcDstQty(ethQty, srcDecimals, dstDecimals, rate); } function getLast4Bytes(bytes32 b) internal pure returns(uint) { // cannot trust compiler with not turning bit operations into EXP opcode return uint(b) / (BYTES_14_OFFSET * BYTES_14_OFFSET); } function getRateByteFromCompactData(bytes32 data, ERC20 token, bool buy) internal view returns(int8) { uint fieldOffset = tokenData[token].compactDataFieldIndex; uint byteOffset; if (buy) byteOffset = 32 - NUM_TOKENS_IN_COMPACT_DATA + fieldOffset; else byteOffset = 4 + fieldOffset; return int8(data[byteOffset]); } function executeStepFunction(StepFunction f, int x) internal pure returns(int) { uint len = f.y.length; for (uint ind = 0; ind < len; ind++) { if (x <= f.x[ind]) return f.y[ind]; } return f.y[len-1]; } function addBps(uint rate, int bps) internal pure returns(uint) { require(rate <= MAX_RATE); require(bps >= MIN_BPS_ADJUSTMENT); require(bps <= MAX_BPS_ADJUSTMENT); uint maxBps = 100 * 100; return (rate * uint(int(maxBps) + bps)) / maxBps; } function abs(int x) internal pure returns(uint) { if (x < 0) return uint(-1 * x); else return uint(x); } } contract ConversionRateEnhancedSteps is ConversionRates { uint constant internal MAX_STEPS_IN_FUNCTION = 16; int constant internal MAX_IMBALANCE = 2 ** 255 - 1; uint constant internal POW_2_128 = 2 ** 128; int128 constant internal MAX_STEP_VALUE = 2 ** 127 - 1; int128 constant internal MIN_STEP_VALUE = -1 * 2 ** 127; int constant internal MAX_BPS_ADJUSTMENT = 100 * 100; function ConversionRateEnhancedSteps(address _admin) public ConversionRates(_admin) { } // solhint-disable-line no-empty-blocks // Blocking set qty step func as we won't use function setQtyStepFunction( ERC20, int[], int[], int[], int[] ) public onlyOperator { revert(); } function setImbalanceStepFunction( ERC20 token, int[] xBuy, int[] yBuy, int[] xSell, int[] ySell ) public onlyOperator { require(xBuy.length + 1 == yBuy.length); require(xSell.length + 1 == ySell.length); require(yBuy.length <= MAX_STEPS_IN_FUNCTION); require(ySell.length <= MAX_STEPS_IN_FUNCTION); require(tokenData[token].listed); uint i; if (xBuy.length > 1) { // verify qty are increasing for(i = 0; i < xBuy.length - 1; i++) { require(xBuy[i] < xBuy[i + 1]); } } // only need to check last value as it's sorted array require(xBuy.length == 0 || xBuy[xBuy.length - 1] < MAX_STEP_VALUE); // verify yBuy for(i = 0; i < yBuy.length; i++) { require(yBuy[i] >= MIN_BPS_ADJUSTMENT); require(yBuy[i] <= MAX_BPS_ADJUSTMENT); } if (xSell.length > 1) { // verify qty are increasing for(i = 0; i < xSell.length - 1; i++) { require(xSell[i] < xSell[i + 1]); } } // only need to check last value as it's sorted array require(xSell.length == 0 || xSell[xSell.length - 1] < MAX_STEP_VALUE); // verify ySell for(i = 0; i < ySell.length; i++) { require(ySell[i] >= MIN_BPS_ADJUSTMENT); require(ySell[i] <= MAX_BPS_ADJUSTMENT); } int[] memory buyArray = new int[](yBuy.length); for(i = 0; i < yBuy.length; i++) { int128 xBuyVal = (i == yBuy.length - 1) ? MAX_STEP_VALUE : int128(xBuy[i]); buyArray[i] = encodeStepFunctionData(xBuyVal, int128(yBuy[i])); } int[] memory sellArray = new int[](ySell.length); for(i = 0; i < ySell.length; i++) { int128 xSellVal = (i == ySell.length - 1) ? MAX_STEP_VALUE : int128(xSell[i]); sellArray[i] = encodeStepFunctionData(xSellVal, int128(ySell[i])); } int[] memory emptyArr = new int[](0); tokenData[token].buyRateImbalanceStepFunction = StepFunction(buyArray, emptyArr); tokenData[token].sellRateImbalanceStepFunction = StepFunction(sellArray, emptyArr); } /* solhint-disable code-complexity */ function getStepFunctionData(ERC20 token, uint command, uint param) public view returns(int) { if (command == 8) return int(tokenData[token].buyRateImbalanceStepFunction.x.length - 1); int stepXValue; int stepYValue; if (command == 9) { (stepXValue, stepYValue) = decodeStepFunctionData(tokenData[token].buyRateImbalanceStepFunction.x[param]); return stepXValue; } if (command == 10) return int(tokenData[token].buyRateImbalanceStepFunction.x.length); if (command == 11) { (stepXValue, stepYValue) = decodeStepFunctionData(tokenData[token].buyRateImbalanceStepFunction.x[param]); return stepYValue; } if (command == 12) return int(tokenData[token].sellRateImbalanceStepFunction.x.length - 1); if (command == 13) { (stepXValue, stepYValue) = decodeStepFunctionData(tokenData[token].sellRateImbalanceStepFunction.x[param]); return stepXValue; } if (command == 14) return int(tokenData[token].sellRateImbalanceStepFunction.x.length); if (command == 15) { (stepXValue, stepYValue) = decodeStepFunctionData(tokenData[token].sellRateImbalanceStepFunction.x[param]); return stepYValue; } revert(); } /* solhint-disable function-max-lines */ function getRate(ERC20 token, uint currentBlockNumber, bool buy, uint qty) public view returns(uint) { // check if trade is enabled if (!tokenData[token].enabled) return 0; if (tokenControlInfo[token].minimalRecordResolution == 0) return 0; // token control info not set // get rate update block bytes32 compactData = tokenRatesCompactData[tokenData[token].compactDataArrayIndex]; uint updateRateBlock = getLast4Bytes(compactData); if (currentBlockNumber >= updateRateBlock + validRateDurationInBlocks) return 0; // rate is expired // check imbalance int totalImbalance; int blockImbalance; (totalImbalance, blockImbalance) = getImbalance(token, updateRateBlock, currentBlockNumber); // calculate actual rate int imbalanceQty; int extraBps; int8 rateUpdate; uint rate; if (buy) { // start with base rate rate = tokenData[token].baseBuyRate; // add rate update rateUpdate = getRateByteFromCompactData(compactData, token, true); extraBps = int(rateUpdate) * 10; rate = addBps(rate, extraBps); // compute token qty qty = getTokenQty(token, qty, rate); imbalanceQty = int(qty); // add imbalance overhead extraBps = executeStepFunction( tokenData[token].buyRateImbalanceStepFunction, totalImbalance, totalImbalance + imbalanceQty ); rate = addBps(rate, extraBps); totalImbalance += imbalanceQty; } else { // start with base rate rate = tokenData[token].baseSellRate; // add rate update rateUpdate = getRateByteFromCompactData(compactData, token, false); extraBps = int(rateUpdate) * 10; rate = addBps(rate, extraBps); // compute token qty imbalanceQty = -1 * int(qty); // add imbalance overhead extraBps = executeStepFunction( tokenData[token].sellRateImbalanceStepFunction, totalImbalance + imbalanceQty, totalImbalance ); rate = addBps(rate, extraBps); totalImbalance += imbalanceQty; } if (abs(totalImbalance) >= getMaxTotalImbalance(token)) return 0; if (abs(blockImbalance + imbalanceQty) >= getMaxPerBlockImbalance(token)) return 0; return rate; } // Override function getImbalance to fix #240 function getImbalance(ERC20 token, uint rateUpdateBlock, uint currentBlock) internal view returns(int totalImbalance, int currentBlockImbalance) { int resolution = int(tokenControlInfo[token].minimalRecordResolution); (totalImbalance, currentBlockImbalance) = getImbalanceSinceRateUpdate( token, rateUpdateBlock, currentBlock); if (!checkMultOverflow(totalImbalance, resolution)) { totalImbalance *= resolution; } else { totalImbalance = MAX_IMBALANCE; } if (!checkMultOverflow(currentBlockImbalance, resolution)) { currentBlockImbalance *= resolution; } else { currentBlockImbalance = MAX_IMBALANCE; } } function getImbalancePerToken(ERC20 token, uint whichBlock) public view returns(int totalImbalance, int currentBlockImbalance) { uint rateUpdateBlock = getRateUpdateBlock(token); // if whichBlock = 0, use latest block, otherwise use whichBlock uint usedBlock = whichBlock == 0 ? block.number : whichBlock; return getImbalance(token, rateUpdateBlock, usedBlock); } function executeStepFunction(StepFunction storage f, int from, int to) internal view returns(int) { uint len = f.x.length; if (len == 0 || from == to) { return 0; } int fromVal = from; // avoid modifying function parameters int change = 0; // amount change from initial amount when applying bps for each step int stepXValue; int stepYValue; for(uint ind = 0; ind < len; ind++) { (stepXValue, stepYValue) = decodeStepFunctionData(f.x[ind]); if (stepXValue <= fromVal) { continue; } // if it falls into step with y <= -10000, rate must be 0 if (stepYValue == MIN_BPS_ADJUSTMENT) { return MIN_BPS_ADJUSTMENT; } // from here, from < stepXValue, // if from < to <= stepXValue, take [from, to] and return, else take [from, stepXValue] if (stepXValue >= to) { change += (to - fromVal) * stepYValue; return change / (to - from); } else { change += (stepXValue - fromVal) * stepYValue; fromVal = stepXValue; } } return change / (to - from); } // first 128 bits is value for x, next 128 bits is value for y function encodeStepFunctionData(int128 x, int128 y) internal pure returns(int data) { require(x <= MAX_STEP_VALUE && x >= MIN_STEP_VALUE); require(y <= MAX_STEP_VALUE && y >= MIN_STEP_VALUE); data = int(uint(y) & (POW_2_128 - 1)); data |= int((uint(x) & (POW_2_128 - 1)) * POW_2_128); } function decodeStepFunctionData(int val) internal pure returns (int x, int y) { y = int(int128(uint(val) & (POW_2_128 - 1))); x = int(int128((uint(val) / POW_2_128) & (POW_2_128 - 1))); // default to be max value if (x == int(MAX_STEP_VALUE)) { x = MAX_IMBALANCE; } } function checkMultOverflow(int x, int y) internal pure returns(bool) { if (y == 0) return false; return (((x*y) / y) != x); } }

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{"success": true, "error": null, "results": {"detectors": [{"check": "divide-before-multiply", "impact": "Medium", "confidence": "Medium"}, {"check": "shadowing-state", "impact": "High", "confidence": "High"}, {"check": "incorrect-equality", "impact": "Medium", "confidence": "High"}, {"check": "uninitialized-local", "impact": "Medium", "confidence": "Medium"}]}}

0x69c2fe4f5dfa40dd6d09fadd0681f9364a1aada0

pragma solidity 0.5.12; contract BColor { function getColor() external view returns (bytes32); } contract BBronze is BColor { function getColor() external view returns (bytes32) { return bytes32("BRONZE"); } } contract BConst is BBronze { uint public constant BONE = 10**18; uint public constant MIN_BOUND_TOKENS = 2; uint public constant MAX_BOUND_TOKENS = 8; uint public constant MIN_FEE = BONE / 10**6; uint public constant MAX_FEE = BONE / 10; uint public constant EXIT_FEE = 0; uint public constant DEFAULT_RESERVES_RATIO = BONE / 5; uint public constant MIN_WEIGHT = BONE; uint public constant MAX_WEIGHT = BONE * 50; uint public constant MAX_TOTAL_WEIGHT = BONE * 50; uint public constant MIN_BALANCE = BONE / 10**12; uint public constant INIT_POOL_SUPPLY = BONE * 100; uint public constant MIN_BPOW_BASE = 1 wei; uint public constant MAX_BPOW_BASE = (2 * BONE) - 1 wei; uint public constant BPOW_PRECISION = BONE / 10**10; uint public constant MAX_IN_RATIO = BONE / 2; uint public constant MAX_OUT_RATIO = (BONE / 3) + 1 wei; } contract BNum is BConst { function btoi(uint a) internal pure returns (uint) { return a / BONE; } function bfloor(uint a) internal pure returns (uint) { return btoi(a) * BONE; } function badd(uint a, uint b) internal pure returns (uint) { uint c = a + b; require(c >= a, "ERR_ADD_OVERFLOW"); return c; } function bsub(uint a, uint b) internal pure returns (uint) { (uint c, bool flag) = bsubSign(a, b); require(!flag, "ERR_SUB_UNDERFLOW"); return c; } function bsubSign(uint a, uint b) internal pure returns (uint, bool) { if (a >= b) { return (a - b, false); } else { return (b - a, true); } } function bmul(uint a, uint b) internal pure returns (uint) { uint c0 = a * b; require(a == 0 || c0 / a == b, "ERR_MUL_OVERFLOW"); uint c1 = c0 + (BONE / 2); require(c1 >= c0, "ERR_MUL_OVERFLOW"); uint c2 = c1 / BONE; return c2; } function bdiv(uint a, uint b) internal pure returns (uint) { require(b != 0, "ERR_DIV_ZERO"); uint c0 = a * BONE; require(a == 0 || c0 / a == BONE, "ERR_DIV_INTERNAL"); // bmul overflow uint c1 = c0 + (b / 2); require(c1 >= c0, "ERR_DIV_INTERNAL"); // badd require uint c2 = c1 / b; return c2; } // DSMath.wpow function bpowi(uint a, uint n) internal pure returns (uint) { uint z = n % 2 != 0 ? a : BONE; for (n /= 2; n != 0; n /= 2) { a = bmul(a, a); if (n % 2 != 0) { z = bmul(z, a); } } return z; } // Compute b^(e.w) by splitting it into (b^e)*(b^0.w). // Use `bpowi` for `b^e` and `bpowK` for k iterations // of approximation of b^0.w function bpow(uint base, uint exp) internal pure returns (uint) { require(base >= MIN_BPOW_BASE, "ERR_BPOW_BASE_TOO_LOW"); require(base <= MAX_BPOW_BASE, "ERR_BPOW_BASE_TOO_HIGH"); uint whole = bfloor(exp); uint remain = bsub(exp, whole); uint wholePow = bpowi(base, btoi(whole)); if (remain == 0) { return wholePow; } uint partialResult = bpowApprox(base, remain, BPOW_PRECISION); return bmul(wholePow, partialResult); } function bpowApprox(uint base, uint exp, uint precision) internal pure returns (uint) { // term 0: uint a = exp; (uint x, bool xneg) = bsubSign(base, BONE); uint term = BONE; uint sum = term; bool negative = false; // term(k) = numer / denom // = (product(a - i - 1, i=1-->k) * x^k) / (k!) // each iteration, multiply previous term by (a-(k-1)) * x / k // continue until term is less than precision for (uint i = 1; term >= precision; i++) { uint bigK = i * BONE; (uint c, bool cneg) = bsubSign(a, bsub(bigK, BONE)); term = bmul(term, bmul(c, x)); term = bdiv(term, bigK); if (term == 0) break; if (xneg) negative = !negative; if (cneg) negative = !negative; if (negative) { sum = bsub(sum, term); } else { sum = badd(sum, term); } } return sum; } } interface IERC20 { event Approval(address indexed src, address indexed dst, uint amt); event Transfer(address indexed src, address indexed dst, uint amt); function totalSupply() external view returns (uint); function balanceOf(address whom) external view returns (uint); function allowance(address src, address dst) external view returns (uint); function approve(address dst, uint amt) external returns (bool); function transfer(address dst, uint amt) external returns (bool); function transferFrom( address src, address dst, uint amt ) external returns (bool); } contract BTokenBase is BNum { mapping(address => uint) internal _balance; mapping(address => mapping(address=>uint)) internal _allowance; uint internal _totalSupply; event Approval(address indexed src, address indexed dst, uint amt); event Transfer(address indexed src, address indexed dst, uint amt); function _mint(uint amt) internal { _balance[address(this)] = badd(_balance[address(this)], amt); _totalSupply = badd(_totalSupply, amt); emit Transfer(address(0), address(this), amt); } function _burn(uint amt) internal { require(_balance[address(this)] >= amt); _balance[address(this)] = bsub(_balance[address(this)], amt); _totalSupply = bsub(_totalSupply, amt); emit Transfer(address(this), address(0), amt); } function _move(address src, address dst, uint amt) internal { require(_balance[src] >= amt); _balance[src] = bsub(_balance[src], amt); _balance[dst] = badd(_balance[dst], amt); emit Transfer(src, dst, amt); } function _push(address to, uint amt) internal { _move(address(this), to, amt); } function _pull(address from, uint amt) internal { _move(from, address(this), amt); } } contract BToken is BTokenBase, IERC20 { string private _name = "Cream Pool Token"; string private _symbol = "CRPT"; uint8 private _decimals = 18; function name() public view returns (string memory) { return _name; } function symbol() public view returns (string memory) { return _symbol; } function decimals() public view returns(uint8) { return _decimals; } function allowance(address src, address dst) external view returns (uint) { return _allowance[src][dst]; } function balanceOf(address whom) external view returns (uint) { return _balance[whom]; } function totalSupply() public view returns (uint) { return _totalSupply; } function approve(address dst, uint amt) external returns (bool) { _allowance[msg.sender][dst] = amt; emit Approval(msg.sender, dst, amt); return true; } function increaseApproval(address dst, uint amt) external returns (bool) { _allowance[msg.sender][dst] = badd(_allowance[msg.sender][dst], amt); emit Approval(msg.sender, dst, _allowance[msg.sender][dst]); return true; } function decreaseApproval(address dst, uint amt) external returns (bool) { uint oldValue = _allowance[msg.sender][dst]; if (amt > oldValue) { _allowance[msg.sender][dst] = 0; } else { _allowance[msg.sender][dst] = bsub(oldValue, amt); } emit Approval(msg.sender, dst, _allowance[msg.sender][dst]); return true; } function transfer(address dst, uint amt) external returns (bool) { _move(msg.sender, dst, amt); return true; } function transferFrom(address src, address dst, uint amt) external returns (bool) { require(msg.sender == src || amt <= _allowance[src][msg.sender]); _move(src, dst, amt); if (msg.sender != src && _allowance[src][msg.sender] != uint256(-1)) { _allowance[src][msg.sender] = bsub(_allowance[src][msg.sender], amt); emit Approval(msg.sender, dst, _allowance[src][msg.sender]); } return true; } } contract BMath is BBronze, BConst, BNum { /********************************************************************************************** // calcSpotPrice // // sP = spotPrice // // bI = tokenBalanceIn ( bI / wI ) 1 // // bO = tokenBalanceOut sP = ----------- * ---------- // // wI = tokenWeightIn ( bO / wO ) ( 1 - sF ) // // wO = tokenWeightOut // // sF = swapFee // **********************************************************************************************/ function calcSpotPrice( uint tokenBalanceIn, uint tokenWeightIn, uint tokenBalanceOut, uint tokenWeightOut, uint swapFee ) public pure returns (uint spotPrice) { uint numer = bdiv(tokenBalanceIn, tokenWeightIn); uint denom = bdiv(tokenBalanceOut, tokenWeightOut); uint ratio = bdiv(numer, denom); uint scale = bdiv(BONE, bsub(BONE, swapFee)); return (spotPrice = bmul(ratio, scale)); } /********************************************************************************************** // calcOutGivenIn // // aO = tokenAmountOut // // bO = tokenBalanceOut // // bI = tokenBalanceIn / / bI \ (wI / wO) \ // // aI = tokenAmountIn aO = bO * | 1 - | -------------------------- | ^ | // // wI = tokenWeightIn \ \ ( bI + ( aI * ( 1 - sF )) / / // // wO = tokenWeightOut // // sF = swapFee // **********************************************************************************************/ function calcOutGivenIn( uint tokenBalanceIn, uint tokenWeightIn, uint tokenBalanceOut, uint tokenWeightOut, uint tokenAmountIn, uint swapFee ) public pure returns (uint tokenAmountOut, uint tokenInFee) { uint weightRatio = bdiv(tokenWeightIn, tokenWeightOut); uint adjustedIn = bsub(BONE, swapFee); adjustedIn = bmul(tokenAmountIn, adjustedIn); uint y = bdiv(tokenBalanceIn, badd(tokenBalanceIn, adjustedIn)); uint foo = bpow(y, weightRatio); uint bar = bsub(BONE, foo); tokenAmountOut = bmul(tokenBalanceOut, bar); tokenInFee = bsub(tokenAmountIn, adjustedIn); return (tokenAmountOut, tokenInFee); } /********************************************************************************************** // calcInGivenOut // // aI = tokenAmountIn // // bO = tokenBalanceOut / / bO \ (wO / wI) \ // // bI = tokenBalanceIn bI * | | ------------ | ^ - 1 | // // aO = tokenAmountOut aI = \ \ ( bO - aO ) / / // // wI = tokenWeightIn -------------------------------------------- // // wO = tokenWeightOut ( 1 - sF ) // // sF = swapFee // **********************************************************************************************/ function calcInGivenOut( uint tokenBalanceIn, uint tokenWeightIn, uint tokenBalanceOut, uint tokenWeightOut, uint tokenAmountOut, uint swapFee ) public pure returns (uint tokenAmountIn, uint tokenInFee) { uint weightRatio = bdiv(tokenWeightOut, tokenWeightIn); uint diff = bsub(tokenBalanceOut, tokenAmountOut); uint y = bdiv(tokenBalanceOut, diff); uint foo = bpow(y, weightRatio); foo = bsub(foo, BONE); foo = bmul(tokenBalanceIn, foo); tokenAmountIn = bsub(BONE, swapFee); tokenAmountIn = bdiv(foo, tokenAmountIn); tokenInFee = bdiv(foo, BONE); tokenInFee = bsub(tokenAmountIn, tokenInFee); return (tokenAmountIn, tokenInFee); } /********************************************************************************************** // calcPoolOutGivenSingleIn // // pAo = poolAmountOut / \ // // tAi = tokenAmountIn /// / // wI \ \\ \ wI \ // // wI = tokenWeightIn //| tAi *| 1 - || 1 - -- | * sF || + tBi \ -- \ // // tW = totalWeight pAo=|| \ \ \\ tW / // | ^ tW | * pS - pS // // tBi = tokenBalanceIn \\ ------------------------------------- / / // // pS = poolSupply \\ tBi / / // // sF = swapFee \ / // **********************************************************************************************/ function calcPoolOutGivenSingleIn( uint tokenBalanceIn, uint tokenWeightIn, uint poolSupply, uint totalWeight, uint tokenAmountIn, uint swapFee, uint reservesRatio ) public pure returns (uint poolAmountOut, uint reserves) { // Charge the trading fee for the proportion of tokenAi /// which is implicitly traded to the other pool tokens. // That proportion is (1- weightTokenIn) // tokenAiAfterFee = tAi * (1 - (1-weightTi) * poolFee); uint normalizedWeight = bdiv(tokenWeightIn, totalWeight); // Exact fee portion of `tokenAmountIn`, i.e. (1- Wt) uint zaz = bmul(bsub(BONE, normalizedWeight), swapFee); uint tokenAmountInAfterFee = bmul(tokenAmountIn, bsub(BONE, zaz)); reserves = calcReserves(tokenAmountIn, tokenAmountInAfterFee, reservesRatio); uint newTokenBalanceIn = badd(tokenBalanceIn, tokenAmountInAfterFee); uint tokenInRatio = bdiv(newTokenBalanceIn, tokenBalanceIn); // uint newPoolSupply = (ratioTi ^ weightTi) * poolSupply; uint poolRatio = bpow(tokenInRatio, normalizedWeight); uint newPoolSupply = bmul(poolRatio, poolSupply); poolAmountOut = bsub(newPoolSupply, poolSupply); return (poolAmountOut, reserves); } /********************************************************************************************** // calcSingleInGivenPoolOut // // tAi = tokenAmountIn //(pS + pAo)\ / 1 \\ // // pS = poolSupply || --------- | ^ | --------- || * bI - bI // // pAo = poolAmountOut \\ pS / \(wI / tW)// // // bI = balanceIn tAi = -------------------------------------------- // // wI = weightIn / wI \ // // tW = totalWeight | 1 - ---- | * sF // // sF = swapFee \ tW / // **********************************************************************************************/ function calcSingleInGivenPoolOut( uint tokenBalanceIn, uint tokenWeightIn, uint poolSupply, uint totalWeight, uint poolAmountOut, uint swapFee ) public pure returns (uint tokenAmountIn) { uint normalizedWeight = bdiv(tokenWeightIn, totalWeight); uint newPoolSupply = badd(poolSupply, poolAmountOut); uint poolRatio = bdiv(newPoolSupply, poolSupply); //uint newBalTi = poolRatio^(1/weightTi) * balTi; uint boo = bdiv(BONE, normalizedWeight); uint tokenInRatio = bpow(poolRatio, boo); uint newTokenBalanceIn = bmul(tokenInRatio, tokenBalanceIn); uint tokenAmountInAfterFee = bsub(newTokenBalanceIn, tokenBalanceIn); // Do reverse order of fees charged in joinswap_ExternAmountIn, this way // ``` pAo == joinswap_ExternAmountIn(Ti, joinswap_PoolAmountOut(pAo, Ti)) ``` //uint tAi = tAiAfterFee / (1 - (1-weightTi) * swapFee) ; uint zar = bmul(bsub(BONE, normalizedWeight), swapFee); tokenAmountIn = bdiv(tokenAmountInAfterFee, bsub(BONE, zar)); return tokenAmountIn; } /********************************************************************************************** // calcSingleOutGivenPoolIn // // tAo = tokenAmountOut / / \\ // // bO = tokenBalanceOut / // pS - (pAi * (1 - eF)) \ / 1 \ \\ // // pAi = poolAmountIn | bO - || ----------------------- | ^ | --------- | * b0 || // // ps = poolSupply \ \\ pS / \(wO / tW)/ // // // wI = tokenWeightIn tAo = \ \ // // // tW = totalWeight / / wO \ \ // // sF = swapFee * | 1 - | 1 - ---- | * sF | // // eF = exitFee \ \ tW / / // **********************************************************************************************/ function calcSingleOutGivenPoolIn( uint tokenBalanceOut, uint tokenWeightOut, uint poolSupply, uint totalWeight, uint poolAmountIn, uint swapFee ) public pure returns (uint tokenAmountOut) { uint normalizedWeight = bdiv(tokenWeightOut, totalWeight); // charge exit fee on the pool token side // pAiAfterExitFee = pAi*(1-exitFee) uint poolAmountInAfterExitFee = bmul(poolAmountIn, bsub(BONE, EXIT_FEE)); uint newPoolSupply = bsub(poolSupply, poolAmountInAfterExitFee); uint poolRatio = bdiv(newPoolSupply, poolSupply); // newBalTo = poolRatio^(1/weightTo) * balTo; uint tokenOutRatio = bpow(poolRatio, bdiv(BONE, normalizedWeight)); uint newTokenBalanceOut = bmul(tokenOutRatio, tokenBalanceOut); uint tokenAmountOutBeforeSwapFee = bsub(tokenBalanceOut, newTokenBalanceOut); // charge swap fee on the output token side //uint tAo = tAoBeforeSwapFee * (1 - (1-weightTo) * swapFee) uint zaz = bmul(bsub(BONE, normalizedWeight), swapFee); tokenAmountOut = bmul(tokenAmountOutBeforeSwapFee, bsub(BONE, zaz)); return tokenAmountOut; } /********************************************************************************************** // calcPoolInGivenSingleOut // // pAi = poolAmountIn // / tAo \\ / wO \ \ // // bO = tokenBalanceOut // | bO - -------------------------- |\ | ---- | \ // // tAo = tokenAmountOut pS - || \ 1 - ((1 - (tO / tW)) * sF)/ | ^ \ tW / * pS | // // ps = poolSupply \\ -----------------------------------/ / // // wO = tokenWeightOut pAi = \\ bO / / // // tW = totalWeight ------------------------------------------------------------- // // sF = swapFee ( 1 - eF ) // // eF = exitFee // **********************************************************************************************/ function calcPoolInGivenSingleOut( uint tokenBalanceOut, uint tokenWeightOut, uint poolSupply, uint totalWeight, uint tokenAmountOut, uint swapFee, uint reservesRatio ) public pure returns (uint poolAmountIn, uint reserves) { // charge swap fee on the output token side uint normalizedWeight = bdiv(tokenWeightOut, totalWeight); uint zar = bmul(bsub(BONE, normalizedWeight), swapFee); uint tokenAmountOutBeforeSwapFee = bdiv(tokenAmountOut, bsub(BONE, zar)); reserves = calcReserves(tokenAmountOutBeforeSwapFee, tokenAmountOut, reservesRatio); uint newTokenBalanceOut = bsub(tokenBalanceOut, tokenAmountOutBeforeSwapFee); uint tokenOutRatio = bdiv(newTokenBalanceOut, tokenBalanceOut); //uint newPoolSupply = (ratioTo ^ weightTo) * poolSupply; uint poolRatio = bpow(tokenOutRatio, normalizedWeight); uint newPoolSupply = bmul(poolRatio, poolSupply); uint poolAmountInAfterExitFee = bsub(poolSupply, newPoolSupply); // charge exit fee on the pool token side // pAi = pAiAfterExitFee/(1-exitFee) poolAmountIn = bdiv(poolAmountInAfterExitFee, bsub(BONE, EXIT_FEE)); return (poolAmountIn, reserves); } // `swapFeeAndReserves = amountWithFee - amountWithoutFee` is the swap fee in balancer. // We divide `swapFeeAndReserves` into halves, `actualSwapFee` and `reserves`. // `reserves` goes to the admin and `actualSwapFee` still goes to the liquidity // providers. function calcReserves(uint amountWithFee, uint amountWithoutFee, uint reservesRatio) internal pure returns (uint reserves) { require(amountWithFee >= amountWithoutFee, "ERR_MATH_APPROX"); require(reservesRatio <= BONE, "ERR_INVALID_RESERVE"); uint swapFeeAndReserves = bsub(amountWithFee, amountWithoutFee); reserves = bmul(swapFeeAndReserves, reservesRatio); require(swapFeeAndReserves >= reserves, "ERR_MATH_APPROX"); } function calcReservesFromFee(uint fee, uint reservesRatio) internal pure returns (uint reserves) { require(reservesRatio <= BONE, "ERR_INVALID_RESERVE"); reserves = bmul(fee, reservesRatio); } } contract BPool is BBronze, BToken, BMath { struct Record { bool bound; // is token bound to pool uint index; // private uint denorm; // denormalized weight uint balance; } event LOG_SWAP( address indexed caller, address indexed tokenIn, address indexed tokenOut, uint256 tokenAmountIn, uint256 tokenAmountOut, uint256 reservesAmount ); event LOG_JOIN( address indexed caller, address indexed tokenIn, uint256 tokenAmountIn, uint256 reservesAmount ); event LOG_EXIT( address indexed caller, address indexed tokenOut, uint256 tokenAmountOut, uint256 reservesAmount ); event LOG_DRAIN_RESERVES( address indexed caller, address indexed tokenOut, uint256 tokenAmountOut ); event LOG_ADD_RESERVES( address indexed token, uint256 reservesAmount ); event LOG_CALL( bytes4 indexed sig, address indexed caller, bytes data ) anonymous; modifier _logs_() { emit LOG_CALL(msg.sig, msg.sender, msg.data); _; } modifier _lock_() { require(!_mutex); _mutex = true; _; _mutex = false; } modifier _viewlock_() { require(!_mutex); _; } bool private _mutex; address private _factory; // BFactory address to push token exitFee to address private _controller; // has CONTROL role bool private _publicSwap; // true if PUBLIC can call SWAP functions // `setSwapFee` and `finalize` require CONTROL // `finalize` sets `PUBLIC can SWAP`, `PUBLIC can JOIN` uint private _swapFee; uint private _reservesRatio; bool private _finalized; address[] private _tokens; mapping(address=>Record) private _records; mapping(address=>uint) public totalReserves; uint private _totalWeight; constructor() public { _controller = msg.sender; _factory = msg.sender; _swapFee = MIN_FEE; _reservesRatio = DEFAULT_RESERVES_RATIO; _publicSwap = false; _finalized = false; } function isPublicSwap() external view returns (bool) { return _publicSwap; } function isFinalized() external view returns (bool) { return _finalized; } function isBound(address t) external view returns (bool) { return _records[t].bound; } function getNumTokens() external view returns (uint) { return _tokens.length; } function getCurrentTokens() external view _viewlock_ returns (address[] memory tokens) { return _tokens; } function getFinalTokens() external view _viewlock_ returns (address[] memory tokens) { require(_finalized); return _tokens; } function getDenormalizedWeight(address token) external view _viewlock_ returns (uint) { require(_records[token].bound); return _records[token].denorm; } function getTotalDenormalizedWeight() external view _viewlock_ returns (uint) { return _totalWeight; } function getNormalizedWeight(address token) external view _viewlock_ returns (uint) { require(_records[token].bound); uint denorm = _records[token].denorm; return bdiv(denorm, _totalWeight); } function getBalance(address token) external view _viewlock_ returns (uint) { require(_records[token].bound); return _records[token].balance; } function getSwapFee() external view _viewlock_ returns (uint) { return _swapFee; } function getReservesRatio() external view _viewlock_ returns (uint) { return _reservesRatio; } function getController() external view _viewlock_ returns (address) { return _controller; } function setSwapFee(uint swapFee) external _logs_ _lock_ { require(!_finalized); require(msg.sender == _controller); require(swapFee >= MIN_FEE); require(swapFee <= MAX_FEE); _swapFee = swapFee; } function setReservesRatio(uint reservesRatio) external _logs_ _lock_ { require(!_finalized); require(msg.sender == _controller); require(reservesRatio <= BONE); _reservesRatio = reservesRatio; } function setController(address manager) external _logs_ _lock_ { require(msg.sender == _controller); _controller = manager; } function setPublicSwap(bool public_) external _logs_ _lock_ { require(!_finalized); require(msg.sender == _controller); _publicSwap = public_; } function finalize() external _logs_ _lock_ { require(msg.sender == _controller); require(!_finalized); require(_tokens.length >= MIN_BOUND_TOKENS); _finalized = true; _publicSwap = true; _mintPoolShare(INIT_POOL_SUPPLY); _pushPoolShare(msg.sender, INIT_POOL_SUPPLY); } function bind(address token, uint balance, uint denorm) external _logs_ // _lock_ Bind does not lock because it jumps to `rebind`, which does { require(msg.sender == _controller); require(!_records[token].bound); require(!_finalized); require(_tokens.length < MAX_BOUND_TOKENS); _records[token] = Record({ bound: true, index: _tokens.length, denorm: 0, // balance and denorm will be validated balance: 0 // and set by `rebind` }); _tokens.push(token); rebind(token, balance, denorm); } function rebind(address token, uint balance, uint denorm) public _logs_ _lock_ { require(msg.sender == _controller); require(_records[token].bound); require(!_finalized); require(denorm >= MIN_WEIGHT); require(denorm <= MAX_WEIGHT); require(balance >= MIN_BALANCE); // Adjust the denorm and totalWeight uint oldWeight = _records[token].denorm; if (denorm > oldWeight) { _totalWeight = badd(_totalWeight, bsub(denorm, oldWeight)); require(_totalWeight <= MAX_TOTAL_WEIGHT); } else if (denorm < oldWeight) { _totalWeight = bsub(_totalWeight, bsub(oldWeight, denorm)); } _records[token].denorm = denorm; // Adjust the balance record and actual token balance uint oldBalance = _records[token].balance; _records[token].balance = balance; if (balance > oldBalance) { _pullUnderlying(token, msg.sender, bsub(balance, oldBalance)); } else if (balance < oldBalance) { // In this case liquidity is being withdrawn, so charge EXIT_FEE uint tokenBalanceWithdrawn = bsub(oldBalance, balance); uint tokenExitFee = bmul(tokenBalanceWithdrawn, EXIT_FEE); _pushUnderlying(token, msg.sender, bsub(tokenBalanceWithdrawn, tokenExitFee)); _pushUnderlying(token, _factory, tokenExitFee); } } function unbind(address token) external _logs_ _lock_ { require(msg.sender == _controller); require(_records[token].bound); require(!_finalized); uint tokenBalance = _records[token].balance; uint tokenExitFee = bmul(tokenBalance, EXIT_FEE); _totalWeight = bsub(_totalWeight, _records[token].denorm); // Swap the token-to-unbind with the last token, // then delete the last token uint index = _records[token].index; uint last = _tokens.length - 1; _tokens[index] = _tokens[last]; _records[_tokens[index]].index = index; _tokens.pop(); _records[token] = Record({ bound: false, index: 0, denorm: 0, balance: 0 }); _pushUnderlying(token, msg.sender, bsub(tokenBalance, tokenExitFee)); _pushUnderlying(token, _factory, tokenExitFee); } // Absorb any tokens that have been sent to this contract into the pool function gulp(address token) external _logs_ _lock_ { require(_records[token].bound); uint erc20Balance = IERC20(token).balanceOf(address(this)); uint reserves = totalReserves[token]; // `_records[token].balance` should be equaled to `bsub(erc20Balance, reserves)` unless there are extra // tokens transferred to this pool without calling `joinxxx`. require(_records[token].balance <= bsub(erc20Balance, reserves)); _records[token].balance = bsub(erc20Balance, reserves); } function seize(address token, uint amount) external _logs_ _lock_ { require(msg.sender == _controller); require(!_records[token].bound); uint bal = IERC20(token).balanceOf(address(this)); require(amount <= bal); _pushUnderlying(token, msg.sender, amount); } function getSpotPrice(address tokenIn, address tokenOut) external view _viewlock_ returns (uint spotPrice) { require(_records[tokenIn].bound, "ERR_NOT_BOUND"); require(_records[tokenOut].bound, "ERR_NOT_BOUND"); Record storage inRecord = _records[tokenIn]; Record storage outRecord = _records[tokenOut]; return calcSpotPrice(inRecord.balance, inRecord.denorm, outRecord.balance, outRecord.denorm, _swapFee); } function getSpotPriceSansFee(address tokenIn, address tokenOut) external view _viewlock_ returns (uint spotPrice) { require(_records[tokenIn].bound, "ERR_NOT_BOUND"); require(_records[tokenOut].bound, "ERR_NOT_BOUND"); Record storage inRecord = _records[tokenIn]; Record storage outRecord = _records[tokenOut]; return calcSpotPrice(inRecord.balance, inRecord.denorm, outRecord.balance, outRecord.denorm, 0); } function joinPool(uint poolAmountOut, uint[] calldata maxAmountsIn) external _logs_ _lock_ { require(_finalized, "ERR_NOT_FINALIZED"); uint poolTotal = totalSupply(); uint ratio = bdiv(poolAmountOut, poolTotal); require(ratio != 0, "ERR_MATH_APPROX"); for (uint i = 0; i < _tokens.length; i++) { address t = _tokens[i]; uint bal = _records[t].balance; uint tokenAmountIn = bmul(ratio, bal); require(tokenAmountIn != 0, "ERR_MATH_APPROX"); require(tokenAmountIn <= maxAmountsIn[i], "ERR_LIMIT_IN"); _records[t].balance = badd(_records[t].balance, tokenAmountIn); emit LOG_JOIN(msg.sender, t, tokenAmountIn, 0); _pullUnderlying(t, msg.sender, tokenAmountIn); } _mintPoolShare(poolAmountOut); _pushPoolShare(msg.sender, poolAmountOut); } function exitPool(uint poolAmountIn, uint[] calldata minAmountsOut) external _logs_ _lock_ { require(_finalized, "ERR_NOT_FINALIZED"); uint poolTotal = totalSupply(); uint exitFee = bmul(poolAmountIn, EXIT_FEE); uint pAiAfterExitFee = bsub(poolAmountIn, exitFee); uint ratio = bdiv(pAiAfterExitFee, poolTotal); require(ratio != 0, "ERR_MATH_APPROX"); _pullPoolShare(msg.sender, poolAmountIn); _pushPoolShare(_factory, exitFee); _burnPoolShare(pAiAfterExitFee); for (uint i = 0; i < _tokens.length; i++) { address t = _tokens[i]; uint bal = _records[t].balance; uint tokenAmountOut = bmul(ratio, bal); require(tokenAmountOut != 0, "ERR_MATH_APPROX"); require(tokenAmountOut >= minAmountsOut[i], "ERR_LIMIT_OUT"); _records[t].balance = bsub(_records[t].balance, tokenAmountOut); emit LOG_EXIT(msg.sender, t, tokenAmountOut, 0); _pushUnderlying(t, msg.sender, tokenAmountOut); } } function swapExactAmountIn( address tokenIn, uint tokenAmountIn, address tokenOut, uint minAmountOut, uint maxPrice ) external _logs_ _lock_ returns (uint tokenAmountOut, uint spotPriceAfter) { require(_records[tokenIn].bound, "ERR_NOT_BOUND"); require(_records[tokenOut].bound, "ERR_NOT_BOUND"); require(_publicSwap, "ERR_SWAP_NOT_PUBLIC"); Record storage inRecord = _records[address(tokenIn)]; Record storage outRecord = _records[address(tokenOut)]; require(tokenAmountIn <= bmul(inRecord.balance, MAX_IN_RATIO), "ERR_MAX_IN_RATIO"); uint spotPriceBefore = calcSpotPrice( inRecord.balance, inRecord.denorm, outRecord.balance, outRecord.denorm, _swapFee ); require(spotPriceBefore <= maxPrice, "ERR_BAD_LIMIT_PRICE"); uint tokenInFee; (tokenAmountOut, tokenInFee) = calcOutGivenIn( inRecord.balance, inRecord.denorm, outRecord.balance, outRecord.denorm, tokenAmountIn, _swapFee ); require(tokenAmountOut >= minAmountOut, "ERR_LIMIT_OUT"); uint reserves = calcReservesFromFee(tokenInFee, _reservesRatio); // Subtract `reserves`. inRecord.balance = bsub(badd(inRecord.balance, tokenAmountIn), reserves); outRecord.balance = bsub(outRecord.balance, tokenAmountOut); spotPriceAfter = calcSpotPrice( inRecord.balance, inRecord.denorm, outRecord.balance, outRecord.denorm, _swapFee ); require(spotPriceAfter >= spotPriceBefore, "ERR_MATH_APPROX"); require(spotPriceAfter <= maxPrice, "ERR_LIMIT_PRICE"); require(spotPriceBefore <= bdiv(tokenAmountIn, tokenAmountOut), "ERR_MATH_APPROX"); emit LOG_SWAP(msg.sender, tokenIn, tokenOut, tokenAmountIn, tokenAmountOut, reserves); totalReserves[address(tokenIn)] = badd(totalReserves[address(tokenIn)], reserves); emit LOG_ADD_RESERVES(address(tokenIn), reserves); _pullUnderlying(tokenIn, msg.sender, tokenAmountIn); _pushUnderlying(tokenOut, msg.sender, tokenAmountOut); return (tokenAmountOut, spotPriceAfter); } function swapExactAmountOut( address tokenIn, uint maxAmountIn, address tokenOut, uint tokenAmountOut, uint maxPrice ) external _logs_ _lock_ returns (uint tokenAmountIn, uint spotPriceAfter) { require(_records[tokenIn].bound, "ERR_NOT_BOUND"); require(_records[tokenOut].bound, "ERR_NOT_BOUND"); require(_publicSwap, "ERR_SWAP_NOT_PUBLIC"); Record storage inRecord = _records[address(tokenIn)]; Record storage outRecord = _records[address(tokenOut)]; require(tokenAmountOut <= bmul(outRecord.balance, MAX_OUT_RATIO), "ERR_MAX_OUT_RATIO"); uint spotPriceBefore = calcSpotPrice( inRecord.balance, inRecord.denorm, outRecord.balance, outRecord.denorm, _swapFee ); require(spotPriceBefore <= maxPrice, "ERR_BAD_LIMIT_PRICE"); uint tokenInFee; (tokenAmountIn, tokenInFee) = calcInGivenOut( inRecord.balance, inRecord.denorm, outRecord.balance, outRecord.denorm, tokenAmountOut, _swapFee ); require(tokenAmountIn <= maxAmountIn, "ERR_LIMIT_IN"); uint reserves = calcReservesFromFee( tokenInFee, _reservesRatio ); // Subtract `reserves` which is reserved for admin. inRecord.balance = bsub(badd(inRecord.balance, tokenAmountIn), reserves); outRecord.balance = bsub(outRecord.balance, tokenAmountOut); spotPriceAfter = calcSpotPrice( inRecord.balance, inRecord.denorm, outRecord.balance, outRecord.denorm, _swapFee ); require(spotPriceAfter >= spotPriceBefore, "ERR_MATH_APPROX"); require(spotPriceAfter <= maxPrice, "ERR_LIMIT_PRICE"); require(spotPriceBefore <= bdiv(tokenAmountIn, tokenAmountOut), "ERR_MATH_APPROX"); emit LOG_SWAP(msg.sender, tokenIn, tokenOut, tokenAmountIn, tokenAmountOut, reserves); totalReserves[address(tokenIn)] = badd(totalReserves[address(tokenIn)], reserves); emit LOG_ADD_RESERVES(address(tokenIn), reserves); _pullUnderlying(tokenIn, msg.sender, tokenAmountIn); _pushUnderlying(tokenOut, msg.sender, tokenAmountOut); return (tokenAmountIn, spotPriceAfter); } function joinswapExternAmountIn(address tokenIn, uint tokenAmountIn, uint minPoolAmountOut) external _logs_ _lock_ returns (uint poolAmountOut) { require(_finalized, "ERR_NOT_FINALIZED"); require(_records[tokenIn].bound, "ERR_NOT_BOUND"); require(tokenAmountIn <= bmul(_records[tokenIn].balance, MAX_IN_RATIO), "ERR_MAX_IN_RATIO"); Record storage inRecord = _records[tokenIn]; uint reserves; (poolAmountOut, reserves) = calcPoolOutGivenSingleIn( inRecord.balance, inRecord.denorm, _totalSupply, _totalWeight, tokenAmountIn, _swapFee, _reservesRatio ); require(poolAmountOut >= minPoolAmountOut, "ERR_LIMIT_OUT"); inRecord.balance = bsub(badd(inRecord.balance, tokenAmountIn), reserves); emit LOG_JOIN(msg.sender, tokenIn, tokenAmountIn, reserves); totalReserves[address(tokenIn)] = badd(totalReserves[address(tokenIn)], reserves); emit LOG_ADD_RESERVES(address(tokenIn), reserves); _mintPoolShare(poolAmountOut); _pushPoolShare(msg.sender, poolAmountOut); _pullUnderlying(tokenIn, msg.sender, tokenAmountIn); return poolAmountOut; } function joinswapPoolAmountOut(address tokenIn, uint poolAmountOut, uint maxAmountIn) external _logs_ _lock_ returns (uint tokenAmountIn) { require(_finalized, "ERR_NOT_FINALIZED"); require(_records[tokenIn].bound, "ERR_NOT_BOUND"); Record storage inRecord = _records[tokenIn]; tokenAmountIn = calcSingleInGivenPoolOut( inRecord.balance, inRecord.denorm, _totalSupply, _totalWeight, poolAmountOut, _swapFee ); require(tokenAmountIn != 0, "ERR_MATH_APPROX"); require(tokenAmountIn <= maxAmountIn, "ERR_LIMIT_IN"); require(tokenAmountIn <= bmul(_records[tokenIn].balance, MAX_IN_RATIO), "ERR_MAX_IN_RATIO"); uint tokenAmountInZeroFee = calcSingleInGivenPoolOut( inRecord.balance, inRecord.denorm, _totalSupply, _totalWeight, poolAmountOut, 0 ); uint reserves = calcReserves( tokenAmountIn, tokenAmountInZeroFee, _reservesRatio ); inRecord.balance = bsub(badd(inRecord.balance, tokenAmountIn), reserves); emit LOG_JOIN(msg.sender, tokenIn, tokenAmountIn, reserves); totalReserves[address(tokenIn)] = badd(totalReserves[address(tokenIn)], reserves); emit LOG_ADD_RESERVES(address(tokenIn), reserves); _mintPoolShare(poolAmountOut); _pushPoolShare(msg.sender, poolAmountOut); _pullUnderlying(tokenIn, msg.sender, tokenAmountIn); return tokenAmountIn; } function exitswapPoolAmountIn(address tokenOut, uint poolAmountIn, uint minAmountOut) external _logs_ _lock_ returns (uint tokenAmountOut) { require(_finalized, "ERR_NOT_FINALIZED"); require(_records[tokenOut].bound, "ERR_NOT_BOUND"); Record storage outRecord = _records[tokenOut]; tokenAmountOut = calcSingleOutGivenPoolIn( outRecord.balance, outRecord.denorm, _totalSupply, _totalWeight, poolAmountIn, _swapFee ); require(tokenAmountOut >= minAmountOut, "ERR_LIMIT_OUT"); require(tokenAmountOut <= bmul(_records[tokenOut].balance, MAX_OUT_RATIO), "ERR_MAX_OUT_RATIO"); uint tokenAmountOutZeroFee = calcSingleOutGivenPoolIn( outRecord.balance, outRecord.denorm, _totalSupply, _totalWeight, poolAmountIn, 0 ); uint reserves = calcReserves( tokenAmountOutZeroFee, tokenAmountOut, _reservesRatio ); outRecord.balance = bsub(bsub(outRecord.balance, tokenAmountOut), reserves); uint exitFee = bmul(poolAmountIn, EXIT_FEE); emit LOG_EXIT(msg.sender, tokenOut, tokenAmountOut, reserves); totalReserves[address(tokenOut)] = badd(totalReserves[address(tokenOut)], reserves); emit LOG_ADD_RESERVES(address(tokenOut), reserves); _pullPoolShare(msg.sender, poolAmountIn); _burnPoolShare(bsub(poolAmountIn, exitFee)); _pushPoolShare(_factory, exitFee); _pushUnderlying(tokenOut, msg.sender, tokenAmountOut); return tokenAmountOut; } function exitswapExternAmountOut(address tokenOut, uint tokenAmountOut, uint maxPoolAmountIn) external _logs_ _lock_ returns (uint poolAmountIn) { require(_finalized, "ERR_NOT_FINALIZED"); require(_records[tokenOut].bound, "ERR_NOT_BOUND"); require(tokenAmountOut <= bmul(_records[tokenOut].balance, MAX_OUT_RATIO), "ERR_MAX_OUT_RATIO"); Record storage outRecord = _records[tokenOut]; uint reserves; (poolAmountIn, reserves) = calcPoolInGivenSingleOut( outRecord.balance, outRecord.denorm, _totalSupply, _totalWeight, tokenAmountOut, _swapFee, _reservesRatio ); require(poolAmountIn != 0, "ERR_MATH_APPROX"); require(poolAmountIn <= maxPoolAmountIn, "ERR_LIMIT_IN"); outRecord.balance = bsub(bsub(outRecord.balance, tokenAmountOut), reserves); uint exitFee = bmul(poolAmountIn, EXIT_FEE); emit LOG_EXIT(msg.sender, tokenOut, tokenAmountOut, reserves); totalReserves[address(tokenOut)] = badd(totalReserves[address(tokenOut)], reserves); emit LOG_ADD_RESERVES(address(tokenOut), reserves); _pullPoolShare(msg.sender, poolAmountIn); _burnPoolShare(bsub(poolAmountIn, exitFee)); _pushPoolShare(_factory, exitFee); _pushUnderlying(tokenOut, msg.sender, tokenAmountOut); return poolAmountIn; } function drainTotalReserves(address reservesAddress) external _logs_ _lock_ { require(msg.sender == _factory); for (uint i = 0; i < _tokens.length; i++) { address t = _tokens[i]; uint tokenAmountOut = totalReserves[t]; totalReserves[t] = 0; emit LOG_DRAIN_RESERVES(reservesAddress, t, tokenAmountOut); _pushUnderlying(t, reservesAddress, tokenAmountOut); } } // == // 'Underlying' token-manipulation functions make external calls but are NOT locked // You must `_lock_` or otherwise ensure reentry-safety function _pullUnderlying(address erc20, address from, uint amount) internal { bool xfer = IERC20(erc20).transferFrom(from, address(this), amount); require(xfer, "ERR_ERC20_FALSE"); } function _pushUnderlying(address erc20, address to, uint amount) internal { bool xfer = IERC20(erc20).transfer(to, amount); require(xfer, "ERR_ERC20_FALSE"); } function _pullPoolShare(address from, uint amount) internal { _pull(from, amount); } function _pushPoolShare(address to, uint amount) internal { _push(to, amount); } function _mintPoolShare(uint amount) internal { _mint(amount); } function _burnPoolShare(uint amount) internal { _burn(amount); } }

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{"success": true, "error": null, "results": {"detectors": [{"check": "incorrect-equality", "impact": "Medium", "confidence": "High"}]}}

0x6b2a56fd57124f67bf038cde6129b2f6305c8654

pragma solidity 0.4.21; contract EIP20Interface { /* This is a slight change to the ERC20 base standard. function totalSupply() constant returns (uint256 supply); is replaced with: uint256 public totalSupply; This automatically creates a getter function for the totalSupply. This is moved to the base contract since public getter functions are not currently recognised as an implementation of the matching abstract function by the compiler. */ /// total amount of tokens uint256 public totalSupply; /// @param _owner The address from which the balance will be retrieved /// @return The balance function balanceOf(address _owner) public view returns (uint256 balance); /// @notice send `_value` token to `_to` from `msg.sender` /// @param _to The address of the recipient /// @param _value The amount of token to be transferred /// @return Whether the transfer was successful or not function transfer(address _to, uint256 _value) public returns (bool success); /// @notice send `_value` token to `_to` from `_from` on the condition it is approved by `_from` /// @param _from The address of the sender /// @param _to The address of the recipient /// @param _value The amount of token to be transferred /// @return Whether the transfer was successful or not function transferFrom(address _from, address _to, uint256 _value) public returns (bool success); /// @notice `msg.sender` approves `_spender` to spend `_value` tokens /// @param _spender The address of the account able to transfer the tokens /// @param _value The amount of tokens to be approved for transfer /// @return Whether the approval was successful or not function approve(address _spender, uint256 _value) public returns (bool success); /// @param _owner The address of the account owning tokens /// @param _spender The address of the account able to transfer the tokens /// @return Amount of remaining tokens allowed to spent function allowance(address _owner, address _spender) public view returns (uint256 remaining); // solhint-disable-next-line no-simple-event-func-name event Transfer(address indexed _from, address indexed _to, uint256 _value); event Approval(address indexed _owner, address indexed _spender, uint256 _value); } contract yPOOL is EIP20Interface { uint256 constant private MAX_UINT256 = 2**256 - 1; mapping (address => uint256) public balances; mapping (address => mapping (address => uint256)) public allowed; /* NOTE: The following variables are OPTIONAL vanities. One does not have to include them. They allow one to customise the token contract & in no way influences the core functionality. Some wallets/interfaces might not even bother to look at this information. */ string public name; //fancy name: eg Simon Bucks uint8 public decimals; //How many decimals to show. string public symbol; //An identifier: eg SBX function yPOOL( uint256 _initialAmount, string _tokenName, uint8 _decimalUnits, string _tokenSymbol ) public { balances[msg.sender] = _initialAmount; // Give the creator all initial tokens totalSupply = _initialAmount; // Update total supply name = _tokenName; // Set the name for display purposes decimals = _decimalUnits; // Amount of decimals for display purposes symbol = _tokenSymbol; // Set the symbol for display purposes } function transfer(address _to, uint256 _value) public returns (bool success) { require(balances[msg.sender] >= _value); balances[msg.sender] -= _value; balances[_to] += _value; emit Transfer(msg.sender, _to, _value); //solhint-disable-line indent, no-unused-vars return true; } function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) { uint256 allowance = allowed[_from][msg.sender]; require(balances[_from] >= _value && allowance >= _value); balances[_to] += _value; balances[_from] -= _value; if (allowance < MAX_UINT256) { allowed[_from][msg.sender] -= _value; } emit Transfer(_from, _to, _value); //solhint-disable-line indent, no-unused-vars return true; } function balanceOf(address _owner) public view returns (uint256 balance) { return balances[_owner]; } function approve(address _spender, uint256 _value) public returns (bool success) { allowed[msg.sender][_spender] = _value; emit Approval(msg.sender, _spender, _value); //solhint-disable-line indent, no-unused-vars return true; } function allowance(address _owner, address _spender) public view returns (uint256 remaining) { return allowed[_owner][_spender]; } }

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{"success": true, "error": null, "results": {}}

0x6b8651b5ee21dc2b7fbe0882f467775dafcefc4a

pragma solidity 0.5.17; pragma experimental ABIEncoderV2; interface PotLike { function chi() external view returns (uint); function pie(address) external view returns (uint); function drip() external returns (uint); function join(uint) external; function exit(uint) external; } interface GemLike { function approve(address, uint) external; function balanceOf(address) external view returns (uint); function transferFrom(address, address, uint) external returns (bool); } interface VatLike { function dai(address) external view returns (uint); function hope(address) external; } interface DaiJoinLike { function vat() external returns (VatLike); function dai() external returns (GemLike); function join(address, uint) external payable; function exit(address, uint) external; } contract CTokenStorage { /** * @dev Guard variable for re-entrancy checks */ bool internal _notEntered; /** * @notice EIP-20 token name for this token */ string public name; /** * @notice EIP-20 token symbol for this token */ string public symbol; /** * @notice EIP-20 token decimals for this token */ uint8 public decimals; /** * @notice Maximum borrow rate that can ever be applied (.0005% / block) */ uint internal constant borrowRateMaxMantissa = 0.0005e16; /** * @notice Maximum fraction of interest that can be set aside for reserves */ uint internal constant reserveFactorMaxMantissa = 1e18; /** * @notice Administrator for this contract */ address payable public admin; /** * @notice Pending administrator for this contract */ address payable public pendingAdmin; /** * @notice Contract which oversees inter-cToken operations */ ComptrollerInterface public comptroller; /** * @notice Model which tells what the current interest rate should be */ InterestRateModel public interestRateModel; /** * @notice Initial exchange rate used when minting the first CTokens (used when totalSupply = 0) */ uint internal initialExchangeRateMantissa; /** * @notice Fraction of interest currently set aside for reserves */ uint public reserveFactorMantissa; /** * @notice Block number that interest was last accrued at */ uint public accrualBlockNumber; /** * @notice Accumulator of the total earned interest rate since the opening of the market */ uint public borrowIndex; /** * @notice Total amount of outstanding borrows of the underlying in this market */ uint public totalBorrows; /** * @notice Total amount of reserves of the underlying held in this market */ uint public totalReserves; /** * @notice Total number of tokens in circulation */ uint public totalSupply; /** * @notice Official record of token balances for each account */ mapping (address => uint) internal accountTokens; /** * @notice Approved token transfer amounts on behalf of others */ mapping (address => mapping (address => uint)) internal transferAllowances; /** * @notice Container for borrow balance information * @member principal Total balance (with accrued interest), after applying the most recent balance-changing action * @member interestIndex Global borrowIndex as of the most recent balance-changing action */ struct BorrowSnapshot { uint principal; uint interestIndex; } /** * @notice Mapping of account addresses to outstanding borrow balances */ mapping(address => BorrowSnapshot) internal accountBorrows; } contract CTokenInterface is CTokenStorage { /** * @notice Indicator that this is a CToken contract (for inspection) */ bool public constant isCToken = true; /*** Market Events ***/ /** * @notice Event emitted when interest is accrued */ event AccrueInterest(uint cashPrior, uint interestAccumulated, uint borrowIndex, uint totalBorrows); /** * @notice Event emitted when tokens are minted */ event Mint(address minter, uint mintAmount, uint mintTokens); /** * @notice Event emitted when tokens are redeemed */ event Redeem(address redeemer, uint redeemAmount, uint redeemTokens); /** * @notice Event emitted when underlying is borrowed */ event Borrow(address borrower, uint borrowAmount, uint accountBorrows, uint totalBorrows); /** * @notice Event emitted when a borrow is repaid */ event RepayBorrow(address payer, address borrower, uint repayAmount, uint accountBorrows, uint totalBorrows); /** * @notice Event emitted when a borrow is liquidated */ event LiquidateBorrow(address liquidator, address borrower, uint repayAmount, address cTokenCollateral, uint seizeTokens); /*** Admin Events ***/ /** * @notice Event emitted when pendingAdmin is changed */ event NewPendingAdmin(address oldPendingAdmin, address newPendingAdmin); /** * @notice Event emitted when pendingAdmin is accepted, which means admin is updated */ event NewAdmin(address oldAdmin, address newAdmin); /** * @notice Event emitted when comptroller is changed */ event NewComptroller(ComptrollerInterface oldComptroller, ComptrollerInterface newComptroller); /** * @notice Event emitted when interestRateModel is changed */ event NewMarketInterestRateModel(InterestRateModel oldInterestRateModel, InterestRateModel newInterestRateModel); /** * @notice Event emitted when the reserve factor is changed */ event NewReserveFactor(uint oldReserveFactorMantissa, uint newReserveFactorMantissa); /** * @notice Event emitted when the reserves are added */ event ReservesAdded(address benefactor, uint addAmount, uint newTotalReserves); /** * @notice Event emitted when the reserves are reduced */ event ReservesReduced(address admin, uint reduceAmount, uint newTotalReserves); /** * @notice EIP20 Transfer event */ event Transfer(address indexed from, address indexed to, uint amount); /** * @notice EIP20 Approval event */ event Approval(address indexed owner, address indexed spender, uint amount); /** * @notice Failure event */ event Failure(uint error, uint info, uint detail); /*** User Interface ***/ function transfer(address dst, uint amount) external returns (bool); function transferFrom(address src, address dst, uint amount) external returns (bool); function approve(address spender, uint amount) external returns (bool); function allowance(address owner, address spender) external view returns (uint); function balanceOf(address owner) external view returns (uint); function balanceOfUnderlying(address owner) external returns (uint); function getAccountSnapshot(address account) external view returns (uint, uint, uint, uint); function borrowRatePerBlock() external view returns (uint); function supplyRatePerBlock() external view returns (uint); function totalBorrowsCurrent() external returns (uint); function borrowBalanceCurrent(address account) external returns (uint); function borrowBalanceStored(address account) public view returns (uint); function exchangeRateCurrent() public returns (uint); function exchangeRateStored() public view returns (uint); function getCash() external view returns (uint); function accrueInterest() public returns (uint); function seize(address liquidator, address borrower, uint seizeTokens) external returns (uint); /*** Admin Functions ***/ function _setPendingAdmin(address payable newPendingAdmin) external returns (uint); function _acceptAdmin() external returns (uint); function _setComptroller(ComptrollerInterface newComptroller) public returns (uint); function _setReserveFactor(uint newReserveFactorMantissa) external returns (uint); function _reduceReserves(uint reduceAmount) external returns (uint); function _setInterestRateModel(InterestRateModel newInterestRateModel) public returns (uint); } contract CErc20Storage { /** * @notice Underlying asset for this CToken */ address public underlying; } contract CErc20Interface is CErc20Storage { /*** User Interface ***/ function mint(uint mintAmount) external returns (uint); function redeem(uint redeemTokens) external returns (uint); function redeemUnderlying(uint redeemAmount) external returns (uint); function borrow(uint borrowAmount) external returns (uint); function repayBorrow(uint repayAmount) external returns (uint); function repayBorrowBehalf(address borrower, uint repayAmount) external returns (uint); function liquidateBorrow(address borrower, uint repayAmount, CTokenInterface cTokenCollateral) external returns (uint); /*** Admin Functions ***/ function _addReserves(uint addAmount) external returns (uint); } contract CDelegationStorage { /** * @notice Implementation address for this contract */ address public implementation; } contract CDelegatorInterface is CDelegationStorage { /** * @notice Emitted when implementation is changed */ event NewImplementation(address oldImplementation, address newImplementation); /** * @notice Called by the admin to update the implementation of the delegator * @param implementation_ The address of the new implementation for delegation * @param allowResign Flag to indicate whether to call _resignImplementation on the old implementation * @param becomeImplementationData The encoded bytes data to be passed to _becomeImplementation */ function _setImplementation(address implementation_, bool allowResign, bytes memory becomeImplementationData) public; } contract CDelegateInterface is CDelegationStorage { /** * @notice Called by the delegator on a delegate to initialize it for duty * @dev Should revert if any issues arise which make it unfit for delegation * @param data The encoded bytes data for any initialization */ function _becomeImplementation(bytes memory data) public; /** * @notice Called by the delegator on a delegate to forfeit its responsibility */ function _resignImplementation() public; } contract CarefulMath { /** * @dev Possible error codes that we can return */ enum MathError { NO_ERROR, DIVISION_BY_ZERO, INTEGER_OVERFLOW, INTEGER_UNDERFLOW } /** * @dev Multiplies two numbers, returns an error on overflow. */ function mulUInt(uint a, uint b) internal pure returns (MathError, uint) { if (a == 0) { return (MathError.NO_ERROR, 0); } uint c = a * b; if (c / a != b) { return (MathError.INTEGER_OVERFLOW, 0); } else { return (MathError.NO_ERROR, c); } } /** * @dev Integer division of two numbers, truncating the quotient. */ function divUInt(uint a, uint b) internal pure returns (MathError, uint) { if (b == 0) { return (MathError.DIVISION_BY_ZERO, 0); } return (MathError.NO_ERROR, a / b); } /** * @dev Subtracts two numbers, returns an error on overflow (i.e. if subtrahend is greater than minuend). */ function subUInt(uint a, uint b) internal pure returns (MathError, uint) { if (b <= a) { return (MathError.NO_ERROR, a - b); } else { return (MathError.INTEGER_UNDERFLOW, 0); } } /** * @dev Adds two numbers, returns an error on overflow. */ function addUInt(uint a, uint b) internal pure returns (MathError, uint) { uint c = a + b; if (c >= a) { return (MathError.NO_ERROR, c); } else { return (MathError.INTEGER_OVERFLOW, 0); } } /** * @dev add a and b and then subtract c */ function addThenSubUInt(uint a, uint b, uint c) internal pure returns (MathError, uint) { (MathError err0, uint sum) = addUInt(a, b); if (err0 != MathError.NO_ERROR) { return (err0, 0); } return subUInt(sum, c); } } contract Cheese { /// @notice EIP-20 token name for this token string public constant name = "Cheese"; /// @notice EIP-20 token symbol for this token string public constant symbol = "CHSTEST"; /// @notice EIP-20 token decimals for this token uint8 public constant decimals = 18; /// @notice Total number of tokens in circulation uint public constant totalSupply = 10000000e18; // 10 million Comp /// @notice Allowance amounts on behalf of others mapping (address => mapping (address => uint96)) internal allowances; /// @notice Official record of token balances for each account mapping (address => uint96) internal balances; /// @notice A record of each accounts delegate mapping (address => address) public delegates; /// @notice A checkpoint for marking number of votes from a given block struct Checkpoint { uint32 fromBlock; uint96 votes; } /// @notice A record of votes checkpoints for each account, by index mapping (address => mapping (uint32 => Checkpoint)) public checkpoints; /// @notice The number of checkpoints for each account mapping (address => uint32) public numCheckpoints; /// @notice The EIP-712 typehash for the contract's domain bytes32 public constant DOMAIN_TYPEHASH = keccak256("EIP712Domain(string name,uint256 chainId,address verifyingContract)"); /// @notice The EIP-712 typehash for the delegation struct used by the contract bytes32 public constant DELEGATION_TYPEHASH = keccak256("Delegation(address delegatee,uint256 nonce,uint256 expiry)"); /// @notice A record of states for signing / validating signatures mapping (address => uint) public nonces; /// @notice An event thats emitted when an account changes its delegate event DelegateChanged(address indexed delegator, address indexed fromDelegate, address indexed toDelegate); /// @notice An event thats emitted when a delegate account's vote balance changes event DelegateVotesChanged(address indexed delegate, uint previousBalance, uint newBalance); /// @notice The standard EIP-20 transfer event event Transfer(address indexed from, address indexed to, uint256 amount); /// @notice The standard EIP-20 approval event event Approval(address indexed owner, address indexed spender, uint256 amount); /** * @notice Construct a new Comp token * @param account The initial account to grant all the tokens */ constructor(address account) public { balances[account] = uint96(totalSupply); emit Transfer(address(0), account, totalSupply); } /** * @notice Get the number of tokens `spender` is approved to spend on behalf of `account` * @param account The address of the account holding the funds * @param spender The address of the account spending the funds * @return The number of tokens approved */ function allowance(address account, address spender) external view returns (uint) { return allowances[account][spender]; } /** * @notice Approve `spender` to transfer up to `amount` from `src` * @dev This will overwrite the approval amount for `spender` * and is subject to issues noted [here](https://eips.ethereum.org/EIPS/eip-20#approve) * @param spender The address of the account which may transfer tokens * @param rawAmount The number of tokens that are approved (2^256-1 means infinite) * @return Whether or not the approval succeeded */ function approve(address spender, uint rawAmount) external returns (bool) { uint96 amount; if (rawAmount == uint(-1)) { amount = uint96(-1); } else { amount = safe96(rawAmount, "Comp::approve: amount exceeds 96 bits"); } allowances[msg.sender][spender] = amount; emit Approval(msg.sender, spender, amount); return true; } /** * @notice Get the number of tokens held by the `account` * @param account The address of the account to get the balance of * @return The number of tokens held */ function balanceOf(address account) external view returns (uint) { return balances[account]; } /** * @notice Transfer `amount` tokens from `msg.sender` to `dst` * @param dst The address of the destination account * @param rawAmount The number of tokens to transfer * @return Whether or not the transfer succeeded */ function transfer(address dst, uint rawAmount) external returns (bool) { uint96 amount = safe96(rawAmount, "Comp::transfer: amount exceeds 96 bits"); _transferTokens(msg.sender, dst, amount); return true; } /** * @notice Transfer `amount` tokens from `src` to `dst` * @param src The address of the source account * @param dst The address of the destination account * @param rawAmount The number of tokens to transfer * @return Whether or not the transfer succeeded */ function transferFrom(address src, address dst, uint rawAmount) external returns (bool) { address spender = msg.sender; uint96 spenderAllowance = allowances[src][spender]; uint96 amount = safe96(rawAmount, "Comp::approve: amount exceeds 96 bits"); if (spender != src && spenderAllowance != uint96(-1)) { uint96 newAllowance = sub96(spenderAllowance, amount, "Comp::transferFrom: transfer amount exceeds spender allowance"); allowances[src][spender] = newAllowance; emit Approval(src, spender, newAllowance); } _transferTokens(src, dst, amount); return true; } /** * @notice Delegate votes from `msg.sender` to `delegatee` * @param delegatee The address to delegate votes to */ function delegate(address delegatee) public { return _delegate(msg.sender, delegatee); } /** * @notice Delegates votes from signatory to `delegatee` * @param delegatee The address to delegate votes to * @param nonce The contract state required to match the signature * @param expiry The time at which to expire the signature * @param v The recovery byte of the signature * @param r Half of the ECDSA signature pair * @param s Half of the ECDSA signature pair */ function delegateBySig(address delegatee, uint nonce, uint expiry, uint8 v, bytes32 r, bytes32 s) public { bytes32 domainSeparator = keccak256(abi.encode(DOMAIN_TYPEHASH, keccak256(bytes(name)), getChainId(), address(this))); bytes32 structHash = keccak256(abi.encode(DELEGATION_TYPEHASH, delegatee, nonce, expiry)); bytes32 digest = keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash)); address signatory = ecrecover(digest, v, r, s); require(signatory != address(0), "Comp::delegateBySig: invalid signature"); require(nonce == nonces[signatory]++, "Comp::delegateBySig: invalid nonce"); require(now <= expiry, "Comp::delegateBySig: signature expired"); return _delegate(signatory, delegatee); } /** * @notice Gets the current votes balance for `account` * @param account The address to get votes balance * @return The number of current votes for `account` */ function getCurrentVotes(address account) external view returns (uint96) { uint32 nCheckpoints = numCheckpoints[account]; return nCheckpoints > 0 ? checkpoints[account][nCheckpoints - 1].votes : 0; } /** * @notice Determine the prior number of votes for an account as of a block number * @dev Block number must be a finalized block or else this function will revert to prevent misinformation. * @param account The address of the account to check * @param blockNumber The block number to get the vote balance at * @return The number of votes the account had as of the given block */ function getPriorVotes(address account, uint blockNumber) public view returns (uint96) { require(blockNumber < block.number, "Comp::getPriorVotes: not yet determined"); uint32 nCheckpoints = numCheckpoints[account]; if (nCheckpoints == 0) { return 0; } // First check most recent balance if (checkpoints[account][nCheckpoints - 1].fromBlock <= blockNumber) { return checkpoints[account][nCheckpoints - 1].votes; } // Next check implicit zero balance if (checkpoints[account][0].fromBlock > blockNumber) { return 0; } uint32 lower = 0; uint32 upper = nCheckpoints - 1; while (upper > lower) { uint32 center = upper - (upper - lower) / 2; // ceil, avoiding overflow Checkpoint memory cp = checkpoints[account][center]; if (cp.fromBlock == blockNumber) { return cp.votes; } else if (cp.fromBlock < blockNumber) { lower = center; } else { upper = center - 1; } } return checkpoints[account][lower].votes; } function _delegate(address delegator, address delegatee) internal { address currentDelegate = delegates[delegator]; uint96 delegatorBalance = balances[delegator]; delegates[delegator] = delegatee; emit DelegateChanged(delegator, currentDelegate, delegatee); _moveDelegates(currentDelegate, delegatee, delegatorBalance); } function _transferTokens(address src, address dst, uint96 amount) internal { require(src != address(0), "Comp::_transferTokens: cannot transfer from the zero address"); require(dst != address(0), "Comp::_transferTokens: cannot transfer to the zero address"); balances[src] = sub96(balances[src], amount, "Comp::_transferTokens: transfer amount exceeds balance"); balances[dst] = add96(balances[dst], amount, "Comp::_transferTokens: transfer amount overflows"); emit Transfer(src, dst, amount); _moveDelegates(delegates[src], delegates[dst], amount); } function _moveDelegates(address srcRep, address dstRep, uint96 amount) internal { if (srcRep != dstRep && amount > 0) { if (srcRep != address(0)) { uint32 srcRepNum = numCheckpoints[srcRep]; uint96 srcRepOld = srcRepNum > 0 ? checkpoints[srcRep][srcRepNum - 1].votes : 0; uint96 srcRepNew = sub96(srcRepOld, amount, "Comp::_moveVotes: vote amount underflows"); _writeCheckpoint(srcRep, srcRepNum, srcRepOld, srcRepNew); } if (dstRep != address(0)) { uint32 dstRepNum = numCheckpoints[dstRep]; uint96 dstRepOld = dstRepNum > 0 ? checkpoints[dstRep][dstRepNum - 1].votes : 0; uint96 dstRepNew = add96(dstRepOld, amount, "Comp::_moveVotes: vote amount overflows"); _writeCheckpoint(dstRep, dstRepNum, dstRepOld, dstRepNew); } } } function _writeCheckpoint(address delegatee, uint32 nCheckpoints, uint96 oldVotes, uint96 newVotes) internal { uint32 blockNumber = safe32(block.number, "Comp::_writeCheckpoint: block number exceeds 32 bits"); if (nCheckpoints > 0 && checkpoints[delegatee][nCheckpoints - 1].fromBlock == blockNumber) { checkpoints[delegatee][nCheckpoints - 1].votes = newVotes; } else { checkpoints[delegatee][nCheckpoints] = Checkpoint(blockNumber, newVotes); numCheckpoints[delegatee] = nCheckpoints + 1; } emit DelegateVotesChanged(delegatee, oldVotes, newVotes); } function safe32(uint n, string memory errorMessage) internal pure returns (uint32) { require(n < 2**32, errorMessage); return uint32(n); } function safe96(uint n, string memory errorMessage) internal pure returns (uint96) { require(n < 2**96, errorMessage); return uint96(n); } function add96(uint96 a, uint96 b, string memory errorMessage) internal pure returns (uint96) { uint96 c = a + b; require(c >= a, errorMessage); return c; } function sub96(uint96 a, uint96 b, string memory errorMessage) internal pure returns (uint96) { require(b <= a, errorMessage); return a - b; } function getChainId() internal pure returns (uint) { uint256 chainId; assembly { chainId := chainid() } return chainId; } } contract ComptrollerInterface { /// @notice Indicator that this is a Comptroller contract (for inspection) bool public constant isComptroller = true; /*** Assets You Are In ***/ function enterMarkets(address[] calldata cTokens) external returns (uint[] memory); function exitMarket(address cToken) external returns (uint); /*** Policy Hooks ***/ function mintAllowed(address cToken, address minter, uint mintAmount) external returns (uint); function mintVerify(address cToken, address minter, uint mintAmount, uint mintTokens) external; function redeemAllowed(address cToken, address redeemer, uint redeemTokens) external returns (uint); function redeemVerify(address cToken, address redeemer, uint redeemAmount, uint redeemTokens) external; function borrowAllowed(address cToken, address borrower, uint borrowAmount) external returns (uint); function borrowVerify(address cToken, address borrower, uint borrowAmount) external; function repayBorrowAllowed( address cToken, address payer, address borrower, uint repayAmount) external returns (uint); function repayBorrowVerify( address cToken, address payer, address borrower, uint repayAmount, uint borrowerIndex) external; function liquidateBorrowAllowed( address cTokenBorrowed, address cTokenCollateral, address liquidator, address borrower, uint repayAmount) external returns (uint); function liquidateBorrowVerify( address cTokenBorrowed, address cTokenCollateral, address liquidator, address borrower, uint repayAmount, uint seizeTokens) external; function seizeAllowed( address cTokenCollateral, address cTokenBorrowed, address liquidator, address borrower, uint seizeTokens) external returns (uint); function seizeVerify( address cTokenCollateral, address cTokenBorrowed, address liquidator, address borrower, uint seizeTokens) external; function transferAllowed(address cToken, address src, address dst, uint transferTokens) external returns (uint); function transferVerify(address cToken, address src, address dst, uint transferTokens) external; /*** Liquidity/Liquidation Calculations ***/ function liquidateCalculateSeizeTokens( address cTokenBorrowed, address cTokenCollateral, uint repayAmount) external view returns (uint, uint); } contract UnitrollerAdminStorage { /** * @notice Administrator for this contract */ address public admin; /** * @notice Pending administrator for this contract */ address public pendingAdmin; /** * @notice Active brains of Unitroller */ address public comptrollerImplementation; /** * @notice Pending brains of Unitroller */ address public pendingComptrollerImplementation; } contract ComptrollerV1Storage is UnitrollerAdminStorage { /** * @notice Oracle which gives the price of any given asset */ PriceOracle public oracle; /** * @notice Multiplier used to calculate the maximum repayAmount when liquidating a borrow */ uint public closeFactorMantissa; /** * @notice Multiplier representing the discount on collateral that a liquidator receives */ uint public liquidationIncentiveMantissa; /** * @notice Max number of assets a single account can participate in (borrow or use as collateral) */ uint public maxAssets; /** * @notice Per-account mapping of "assets you are in", capped by maxAssets */ mapping(address => CToken[]) public accountAssets; } contract ComptrollerV2Storage is ComptrollerV1Storage { struct Market { /// @notice Whether or not this market is listed bool isListed; /** * @notice Multiplier representing the most one can borrow against their collateral in this market. * For instance, 0.9 to allow borrowing 90% of collateral value. * Must be between 0 and 1, and stored as a mantissa. */ uint collateralFactorMantissa; /// @notice Per-market mapping of "accounts in this asset" mapping(address => bool) accountMembership; /// @notice Whether or not this market receives COMP bool isComped; } /** * @notice Official mapping of cTokens -> Market metadata * @dev Used e.g. to determine if a market is supported */ mapping(address => Market) public markets; /** * @notice The Pause Guardian can pause certain actions as a safety mechanism. * Actions which allow users to remove their own assets cannot be paused. * Liquidation / seizing / transfer can only be paused globally, not by market. */ address public pauseGuardian; bool public _mintGuardianPaused; bool public _borrowGuardianPaused; bool public transferGuardianPaused; bool public seizeGuardianPaused; mapping(address => bool) public mintGuardianPaused; mapping(address => bool) public borrowGuardianPaused; } contract ComptrollerV3Storage is ComptrollerV2Storage { struct CompMarketState { /// @notice The market's last updated compBorrowIndex or compSupplyIndex uint224 index; /// @notice The block number the index was last updated at uint32 block; } /// @notice A list of all markets CToken[] public allMarkets; /// @notice The rate at which the flywheel distributes COMP, per block uint public compRate; /// @notice The portion of compRate that each market currently receives mapping(address => uint) public compSpeeds; /// @notice The mining cheese rule, 0 - minting by supply, 1 - minting by borrow uint public miningRule; /// @notice The COMP market supply state for each market mapping(address => CompMarketState) public compSupplyState; /// @notice The COMP market borrow state for each market mapping(address => CompMarketState) public compBorrowState; /// @notice The COMP borrow index for each market for each supplier as of the last time they accrued COMP mapping(address => mapping(address => uint)) public compSupplierIndex; /// @notice The COMP borrow index for each market for each borrower as of the last time they accrued COMP mapping(address => mapping(address => uint)) public compBorrowerIndex; /// @notice The COMP accrued but not yet transferred to each user mapping(address => uint) public compAccrued; /// @notice The mining CHEESE Buff mapping(address => uint) public miningBuff; } interface EIP20Interface { function name() external view returns (string memory); function symbol() external view returns (string memory); function decimals() external view returns (uint8); /** * @notice Get the total number of tokens in circulation * @return The supply of tokens */ function totalSupply() external view returns (uint256); /** * @notice Gets the balance of the specified address * @param owner The address from which the balance will be retrieved * @return The balance */ function balanceOf(address owner) external view returns (uint256 balance); /** * @notice Transfer `amount` tokens from `msg.sender` to `dst` * @param dst The address of the destination account * @param amount The number of tokens to transfer * @return Whether or not the transfer succeeded */ function transfer(address dst, uint256 amount) external returns (bool success); /** * @notice Transfer `amount` tokens from `src` to `dst` * @param src The address of the source account * @param dst The address of the destination account * @param amount The number of tokens to transfer * @return Whether or not the transfer succeeded */ function transferFrom(address src, address dst, uint256 amount) external returns (bool success); /** * @notice Approve `spender` to transfer up to `amount` from `src` * @dev This will overwrite the approval amount for `spender` * and is subject to issues noted [here](https://eips.ethereum.org/EIPS/eip-20#approve) * @param spender The address of the account which may transfer tokens * @param amount The number of tokens that are approved (-1 means infinite) * @return Whether or not the approval succeeded */ function approve(address spender, uint256 amount) external returns (bool success); /** * @notice Get the current allowance from `owner` for `spender` * @param owner The address of the account which owns the tokens to be spent * @param spender The address of the account which may transfer tokens * @return The number of tokens allowed to be spent (-1 means infinite) */ function allowance(address owner, address spender) external view returns (uint256 remaining); event Transfer(address indexed from, address indexed to, uint256 amount); event Approval(address indexed owner, address indexed spender, uint256 amount); } interface EIP20NonStandardInterface { /** * @notice Get the total number of tokens in circulation * @return The supply of tokens */ function totalSupply() external view returns (uint256); /** * @notice Gets the balance of the specified address * @param owner The address from which the balance will be retrieved * @return The balance */ function balanceOf(address owner) external view returns (uint256 balance); /// /// !!!!!!!!!!!!!! /// !!! NOTICE !!! `transfer` does not return a value, in violation of the ERC-20 specification /// !!!!!!!!!!!!!! /// /** * @notice Transfer `amount` tokens from `msg.sender` to `dst` * @param dst The address of the destination account * @param amount The number of tokens to transfer */ function transfer(address dst, uint256 amount) external; /// /// !!!!!!!!!!!!!! /// !!! NOTICE !!! `transferFrom` does not return a value, in violation of the ERC-20 specification /// !!!!!!!!!!!!!! /// /** * @notice Transfer `amount` tokens from `src` to `dst` * @param src The address of the source account * @param dst The address of the destination account * @param amount The number of tokens to transfer */ function transferFrom(address src, address dst, uint256 amount) external; /** * @notice Approve `spender` to transfer up to `amount` from `src` * @dev This will overwrite the approval amount for `spender` * and is subject to issues noted [here](https://eips.ethereum.org/EIPS/eip-20#approve) * @param spender The address of the account which may transfer tokens * @param amount The number of tokens that are approved * @return Whether or not the approval succeeded */ function approve(address spender, uint256 amount) external returns (bool success); /** * @notice Get the current allowance from `owner` for `spender` * @param owner The address of the account which owns the tokens to be spent * @param spender The address of the account which may transfer tokens * @return The number of tokens allowed to be spent */ function allowance(address owner, address spender) external view returns (uint256 remaining); event Transfer(address indexed from, address indexed to, uint256 amount); event Approval(address indexed owner, address indexed spender, uint256 amount); } contract ComptrollerErrorReporter { enum Error { NO_ERROR, UNAUTHORIZED, COMPTROLLER_MISMATCH, INSUFFICIENT_SHORTFALL, INSUFFICIENT_LIQUIDITY, INVALID_CLOSE_FACTOR, INVALID_COLLATERAL_FACTOR, INVALID_LIQUIDATION_INCENTIVE, MARKET_NOT_ENTERED, // no longer possible MARKET_NOT_LISTED, MARKET_ALREADY_LISTED, MATH_ERROR, NONZERO_BORROW_BALANCE, PRICE_ERROR, REJECTION, SNAPSHOT_ERROR, TOO_MANY_ASSETS, TOO_MUCH_REPAY } enum FailureInfo { ACCEPT_ADMIN_PENDING_ADMIN_CHECK, ACCEPT_PENDING_IMPLEMENTATION_ADDRESS_CHECK, EXIT_MARKET_BALANCE_OWED, EXIT_MARKET_REJECTION, SET_CLOSE_FACTOR_OWNER_CHECK, SET_CLOSE_FACTOR_VALIDATION, SET_COLLATERAL_FACTOR_OWNER_CHECK, SET_COLLATERAL_FACTOR_NO_EXISTS, SET_COLLATERAL_FACTOR_VALIDATION, SET_COLLATERAL_FACTOR_WITHOUT_PRICE, SET_IMPLEMENTATION_OWNER_CHECK, SET_LIQUIDATION_INCENTIVE_OWNER_CHECK, SET_LIQUIDATION_INCENTIVE_VALIDATION, SET_MAX_ASSETS_OWNER_CHECK, SET_PENDING_ADMIN_OWNER_CHECK, SET_PENDING_IMPLEMENTATION_OWNER_CHECK, SET_PRICE_ORACLE_OWNER_CHECK, SUPPORT_MARKET_EXISTS, SUPPORT_MARKET_OWNER_CHECK, SET_PAUSE_GUARDIAN_OWNER_CHECK } /** * @dev `error` corresponds to enum Error; `info` corresponds to enum FailureInfo, and `detail` is an arbitrary * contract-specific code that enables us to report opaque error codes from upgradeable contracts. **/ event Failure(uint error, uint info, uint detail); /** * @dev use this when reporting a known error from the money market or a non-upgradeable collaborator */ function fail(Error err, FailureInfo info) internal returns (uint) { emit Failure(uint(err), uint(info), 0); return uint(err); } /** * @dev use this when reporting an opaque error from an upgradeable collaborator contract */ function failOpaque(Error err, FailureInfo info, uint opaqueError) internal returns (uint) { emit Failure(uint(err), uint(info), opaqueError); return uint(err); } } contract TokenErrorReporter { enum Error { NO_ERROR, UNAUTHORIZED, BAD_INPUT, COMPTROLLER_REJECTION, COMPTROLLER_CALCULATION_ERROR, INTEREST_RATE_MODEL_ERROR, INVALID_ACCOUNT_PAIR, INVALID_CLOSE_AMOUNT_REQUESTED, INVALID_COLLATERAL_FACTOR, MATH_ERROR, MARKET_NOT_FRESH, MARKET_NOT_LISTED, TOKEN_INSUFFICIENT_ALLOWANCE, TOKEN_INSUFFICIENT_BALANCE, TOKEN_INSUFFICIENT_CASH, TOKEN_TRANSFER_IN_FAILED, TOKEN_TRANSFER_OUT_FAILED } /* * Note: FailureInfo (but not Error) is kept in alphabetical order * This is because FailureInfo grows significantly faster, and * the order of Error has some meaning, while the order of FailureInfo * is entirely arbitrary. */ enum FailureInfo { ACCEPT_ADMIN_PENDING_ADMIN_CHECK, ACCRUE_INTEREST_ACCUMULATED_INTEREST_CALCULATION_FAILED, ACCRUE_INTEREST_BORROW_RATE_CALCULATION_FAILED, ACCRUE_INTEREST_NEW_BORROW_INDEX_CALCULATION_FAILED, ACCRUE_INTEREST_NEW_TOTAL_BORROWS_CALCULATION_FAILED, ACCRUE_INTEREST_NEW_TOTAL_RESERVES_CALCULATION_FAILED, ACCRUE_INTEREST_SIMPLE_INTEREST_FACTOR_CALCULATION_FAILED, BORROW_ACCUMULATED_BALANCE_CALCULATION_FAILED, BORROW_ACCRUE_INTEREST_FAILED, BORROW_CASH_NOT_AVAILABLE, BORROW_FRESHNESS_CHECK, BORROW_NEW_TOTAL_BALANCE_CALCULATION_FAILED, BORROW_NEW_ACCOUNT_BORROW_BALANCE_CALCULATION_FAILED, BORROW_MARKET_NOT_LISTED, BORROW_COMPTROLLER_REJECTION, LIQUIDATE_ACCRUE_BORROW_INTEREST_FAILED, LIQUIDATE_ACCRUE_COLLATERAL_INTEREST_FAILED, LIQUIDATE_COLLATERAL_FRESHNESS_CHECK, LIQUIDATE_COMPTROLLER_REJECTION, LIQUIDATE_COMPTROLLER_CALCULATE_AMOUNT_SEIZE_FAILED, LIQUIDATE_CLOSE_AMOUNT_IS_UINT_MAX, LIQUIDATE_CLOSE_AMOUNT_IS_ZERO, LIQUIDATE_FRESHNESS_CHECK, LIQUIDATE_LIQUIDATOR_IS_BORROWER, LIQUIDATE_REPAY_BORROW_FRESH_FAILED, LIQUIDATE_SEIZE_BALANCE_INCREMENT_FAILED, LIQUIDATE_SEIZE_BALANCE_DECREMENT_FAILED, LIQUIDATE_SEIZE_COMPTROLLER_REJECTION, LIQUIDATE_SEIZE_LIQUIDATOR_IS_BORROWER, LIQUIDATE_SEIZE_TOO_MUCH, MINT_ACCRUE_INTEREST_FAILED, MINT_COMPTROLLER_REJECTION, MINT_EXCHANGE_CALCULATION_FAILED, MINT_EXCHANGE_RATE_READ_FAILED, MINT_FRESHNESS_CHECK, MINT_NEW_ACCOUNT_BALANCE_CALCULATION_FAILED, MINT_NEW_TOTAL_SUPPLY_CALCULATION_FAILED, MINT_TRANSFER_IN_FAILED, MINT_TRANSFER_IN_NOT_POSSIBLE, REDEEM_ACCRUE_INTEREST_FAILED, REDEEM_COMPTROLLER_REJECTION, REDEEM_EXCHANGE_TOKENS_CALCULATION_FAILED, REDEEM_EXCHANGE_AMOUNT_CALCULATION_FAILED, REDEEM_EXCHANGE_RATE_READ_FAILED, REDEEM_FRESHNESS_CHECK, REDEEM_NEW_ACCOUNT_BALANCE_CALCULATION_FAILED, REDEEM_NEW_TOTAL_SUPPLY_CALCULATION_FAILED, REDEEM_TRANSFER_OUT_NOT_POSSIBLE, REDUCE_RESERVES_ACCRUE_INTEREST_FAILED, REDUCE_RESERVES_ADMIN_CHECK, REDUCE_RESERVES_CASH_NOT_AVAILABLE, REDUCE_RESERVES_FRESH_CHECK, REDUCE_RESERVES_VALIDATION, REPAY_BEHALF_ACCRUE_INTEREST_FAILED, REPAY_BORROW_ACCRUE_INTEREST_FAILED, REPAY_BORROW_ACCUMULATED_BALANCE_CALCULATION_FAILED, REPAY_BORROW_COMPTROLLER_REJECTION, REPAY_BORROW_FRESHNESS_CHECK, REPAY_BORROW_NEW_ACCOUNT_BORROW_BALANCE_CALCULATION_FAILED, REPAY_BORROW_NEW_TOTAL_BALANCE_CALCULATION_FAILED, REPAY_BORROW_TRANSFER_IN_NOT_POSSIBLE, SET_COLLATERAL_FACTOR_OWNER_CHECK, SET_COLLATERAL_FACTOR_VALIDATION, SET_COMPTROLLER_OWNER_CHECK, SET_INTEREST_RATE_MODEL_ACCRUE_INTEREST_FAILED, SET_INTEREST_RATE_MODEL_FRESH_CHECK, SET_INTEREST_RATE_MODEL_OWNER_CHECK, SET_MAX_ASSETS_OWNER_CHECK, SET_ORACLE_MARKET_NOT_LISTED, SET_PENDING_ADMIN_OWNER_CHECK, SET_RESERVE_FACTOR_ACCRUE_INTEREST_FAILED, SET_RESERVE_FACTOR_ADMIN_CHECK, SET_RESERVE_FACTOR_FRESH_CHECK, SET_RESERVE_FACTOR_BOUNDS_CHECK, TRANSFER_COMPTROLLER_REJECTION, TRANSFER_NOT_ALLOWED, TRANSFER_NOT_ENOUGH, TRANSFER_TOO_MUCH, ADD_RESERVES_ACCRUE_INTEREST_FAILED, ADD_RESERVES_FRESH_CHECK, ADD_RESERVES_TRANSFER_IN_NOT_POSSIBLE } /** * @dev `error` corresponds to enum Error; `info` corresponds to enum FailureInfo, and `detail` is an arbitrary * contract-specific code that enables us to report opaque error codes from upgradeable contracts. **/ event Failure(uint error, uint info, uint detail); /** * @dev use this when reporting a known error from the money market or a non-upgradeable collaborator */ function fail(Error err, FailureInfo info) internal returns (uint) { emit Failure(uint(err), uint(info), 0); return uint(err); } /** * @dev use this when reporting an opaque error from an upgradeable collaborator contract */ function failOpaque(Error err, FailureInfo info, uint opaqueError) internal returns (uint) { emit Failure(uint(err), uint(info), opaqueError); return uint(err); } } contract Exponential is CarefulMath { uint constant expScale = 1e18; uint constant doubleScale = 1e36; uint constant halfExpScale = expScale/2; uint constant mantissaOne = expScale; struct Exp { uint mantissa; } struct Double { uint mantissa; } /** * @dev Creates an exponential from numerator and denominator values. * Note: Returns an error if (`num` * 10e18) > MAX_INT, * or if `denom` is zero. */ function getExp(uint num, uint denom) pure internal returns (MathError, Exp memory) { (MathError err0, uint scaledNumerator) = mulUInt(num, expScale); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } (MathError err1, uint rational) = divUInt(scaledNumerator, denom); if (err1 != MathError.NO_ERROR) { return (err1, Exp({mantissa: 0})); } return (MathError.NO_ERROR, Exp({mantissa: rational})); } /** * @dev Adds two exponentials, returning a new exponential. */ function addExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) { (MathError error, uint result) = addUInt(a.mantissa, b.mantissa); return (error, Exp({mantissa: result})); } /** * @dev Subtracts two exponentials, returning a new exponential. */ function subExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) { (MathError error, uint result) = subUInt(a.mantissa, b.mantissa); return (error, Exp({mantissa: result})); } /** * @dev Multiply an Exp by a scalar, returning a new Exp. */ function mulScalar(Exp memory a, uint scalar) pure internal returns (MathError, Exp memory) { (MathError err0, uint scaledMantissa) = mulUInt(a.mantissa, scalar); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } return (MathError.NO_ERROR, Exp({mantissa: scaledMantissa})); } /** * @dev Multiply an Exp by a scalar, then truncate to return an unsigned integer. */ function mulScalarTruncate(Exp memory a, uint scalar) pure internal returns (MathError, uint) { (MathError err, Exp memory product) = mulScalar(a, scalar); if (err != MathError.NO_ERROR) { return (err, 0); } return (MathError.NO_ERROR, truncate(product)); } /** * @dev Multiply an Exp by a scalar, truncate, then add an to an unsigned integer, returning an unsigned integer. */ function mulScalarTruncateAddUInt(Exp memory a, uint scalar, uint addend) pure internal returns (MathError, uint) { (MathError err, Exp memory product) = mulScalar(a, scalar); if (err != MathError.NO_ERROR) { return (err, 0); } return addUInt(truncate(product), addend); } /** * @dev Divide an Exp by a scalar, returning a new Exp. */ function divScalar(Exp memory a, uint scalar) pure internal returns (MathError, Exp memory) { (MathError err0, uint descaledMantissa) = divUInt(a.mantissa, scalar); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } return (MathError.NO_ERROR, Exp({mantissa: descaledMantissa})); } /** * @dev Divide a scalar by an Exp, returning a new Exp. */ function divScalarByExp(uint scalar, Exp memory divisor) pure internal returns (MathError, Exp memory) { /* We are doing this as: getExp(mulUInt(expScale, scalar), divisor.mantissa) How it works: Exp = a / b; Scalar = s; `s / (a / b)` = `b * s / a` and since for an Exp `a = mantissa, b = expScale` */ (MathError err0, uint numerator) = mulUInt(expScale, scalar); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } return getExp(numerator, divisor.mantissa); } /** * @dev Divide a scalar by an Exp, then truncate to return an unsigned integer. */ function divScalarByExpTruncate(uint scalar, Exp memory divisor) pure internal returns (MathError, uint) { (MathError err, Exp memory fraction) = divScalarByExp(scalar, divisor); if (err != MathError.NO_ERROR) { return (err, 0); } return (MathError.NO_ERROR, truncate(fraction)); } /** * @dev Multiplies two exponentials, returning a new exponential. */ function mulExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) { (MathError err0, uint doubleScaledProduct) = mulUInt(a.mantissa, b.mantissa); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } // We add half the scale before dividing so that we get rounding instead of truncation. // See "Listing 6" and text above it at https://accu.org/index.php/journals/1717 // Without this change, a result like 6.6...e-19 will be truncated to 0 instead of being rounded to 1e-18. (MathError err1, uint doubleScaledProductWithHalfScale) = addUInt(halfExpScale, doubleScaledProduct); if (err1 != MathError.NO_ERROR) { return (err1, Exp({mantissa: 0})); } (MathError err2, uint product) = divUInt(doubleScaledProductWithHalfScale, expScale); // The only error `div` can return is MathError.DIVISION_BY_ZERO but we control `expScale` and it is not zero. assert(err2 == MathError.NO_ERROR); return (MathError.NO_ERROR, Exp({mantissa: product})); } /** * @dev Multiplies two exponentials given their mantissas, returning a new exponential. */ function mulExp(uint a, uint b) pure internal returns (MathError, Exp memory) { return mulExp(Exp({mantissa: a}), Exp({mantissa: b})); } /** * @dev Multiplies three exponentials, returning a new exponential. */ function mulExp3(Exp memory a, Exp memory b, Exp memory c) pure internal returns (MathError, Exp memory) { (MathError err, Exp memory ab) = mulExp(a, b); if (err != MathError.NO_ERROR) { return (err, ab); } return mulExp(ab, c); } /** * @dev Divides two exponentials, returning a new exponential. * (a/scale) / (b/scale) = (a/scale) * (scale/b) = a/b, * which we can scale as an Exp by calling getExp(a.mantissa, b.mantissa) */ function divExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) { return getExp(a.mantissa, b.mantissa); } /** * @dev Truncates the given exp to a whole number value. * For example, truncate(Exp{mantissa: 15 * expScale}) = 15 */ function truncate(Exp memory exp) pure internal returns (uint) { // Note: We are not using careful math here as we're performing a division that cannot fail return exp.mantissa / expScale; } /** * @dev Checks if first Exp is less than second Exp. */ function lessThanExp(Exp memory left, Exp memory right) pure internal returns (bool) { return left.mantissa < right.mantissa; } /** * @dev Checks if left Exp <= right Exp. */ function lessThanOrEqualExp(Exp memory left, Exp memory right) pure internal returns (bool) { return left.mantissa <= right.mantissa; } /** * @dev Checks if left Exp > right Exp. */ function greaterThanExp(Exp memory left, Exp memory right) pure internal returns (bool) { return left.mantissa > right.mantissa; } /** * @dev returns true if Exp is exactly zero */ function isZeroExp(Exp memory value) pure internal returns (bool) { return value.mantissa == 0; } function safe224(uint n, string memory errorMessage) pure internal returns (uint224) { require(n < 2**224, errorMessage); return uint224(n); } function safe32(uint n, string memory errorMessage) pure internal returns (uint32) { require(n < 2**32, errorMessage); return uint32(n); } function add_(Exp memory a, Exp memory b) pure internal returns (Exp memory) { return Exp({mantissa: add_(a.mantissa, b.mantissa)}); } function add_(Double memory a, Double memory b) pure internal returns (Double memory) { return Double({mantissa: add_(a.mantissa, b.mantissa)}); } function add_(uint a, uint b) pure internal returns (uint) { return add_(a, b, "addition overflow"); } function add_(uint a, uint b, string memory errorMessage) pure internal returns (uint) { uint c = a + b; require(c >= a, errorMessage); return c; } function sub_(Exp memory a, Exp memory b) pure internal returns (Exp memory) { return Exp({mantissa: sub_(a.mantissa, b.mantissa)}); } function sub_(Double memory a, Double memory b) pure internal returns (Double memory) { return Double({mantissa: sub_(a.mantissa, b.mantissa)}); } function sub_(uint a, uint b) pure internal returns (uint) { return sub_(a, b, "subtraction underflow"); } function sub_(uint a, uint b, string memory errorMessage) pure internal returns (uint) { require(b <= a, errorMessage); return a - b; } function mul_(Exp memory a, Exp memory b) pure internal returns (Exp memory) { return Exp({mantissa: mul_(a.mantissa, b.mantissa) / expScale}); } function mul_(Exp memory a, uint b) pure internal returns (Exp memory) { return Exp({mantissa: mul_(a.mantissa, b)}); } function mul_(uint a, Exp memory b) pure internal returns (uint) { return mul_(a, b.mantissa) / expScale; } function mul_(Double memory a, Double memory b) pure internal returns (Double memory) { return Double({mantissa: mul_(a.mantissa, b.mantissa) / doubleScale}); } function mul_(Double memory a, uint b) pure internal returns (Double memory) { return Double({mantissa: mul_(a.mantissa, b)}); } function mul_(uint a, Double memory b) pure internal returns (uint) { return mul_(a, b.mantissa) / doubleScale; } function mul_(uint a, uint b) pure internal returns (uint) { return mul_(a, b, "multiplication overflow"); } function mul_(uint a, uint b, string memory errorMessage) pure internal returns (uint) { if (a == 0 || b == 0) { return 0; } uint c = a * b; require(c / a == b, errorMessage); return c; } function div_(Exp memory a, Exp memory b) pure internal returns (Exp memory) { return Exp({mantissa: div_(mul_(a.mantissa, expScale), b.mantissa)}); } function div_(Exp memory a, uint b) pure internal returns (Exp memory) { return Exp({mantissa: div_(a.mantissa, b)}); } function div_(uint a, Exp memory b) pure internal returns (uint) { return div_(mul_(a, expScale), b.mantissa); } function div_(Double memory a, Double memory b) pure internal returns (Double memory) { return Double({mantissa: div_(mul_(a.mantissa, doubleScale), b.mantissa)}); } function div_(Double memory a, uint b) pure internal returns (Double memory) { return Double({mantissa: div_(a.mantissa, b)}); } function div_(uint a, Double memory b) pure internal returns (uint) { return div_(mul_(a, doubleScale), b.mantissa); } function div_(uint a, uint b) pure internal returns (uint) { return div_(a, b, "divide by zero"); } function div_(uint a, uint b, string memory errorMessage) pure internal returns (uint) { require(b > 0, errorMessage); return a / b; } function fraction(uint a, uint b) pure internal returns (Double memory) { return Double({mantissa: div_(mul_(a, doubleScale), b)}); } } contract InterestRateModel { /// @notice Indicator that this is an InterestRateModel contract (for inspection) bool public constant isInterestRateModel = true; /** * @notice Calculates the current borrow interest rate per block * @param cash The total amount of cash the market has * @param borrows The total amount of borrows the market has outstanding * @param reserves The total amnount of reserves the market has * @return The borrow rate per block (as a percentage, and scaled by 1e18) */ function getBorrowRate(uint cash, uint borrows, uint reserves) external view returns (uint); /** * @notice Calculates the current supply interest rate per block * @param cash The total amount of cash the market has * @param borrows The total amount of borrows the market has outstanding * @param reserves The total amnount of reserves the market has * @param reserveFactorMantissa The current reserve factor the market has * @return The supply rate per block (as a percentage, and scaled by 1e18) */ function getSupplyRate(uint cash, uint borrows, uint reserves, uint reserveFactorMantissa) external view returns (uint); } contract PriceOracle { /// @notice Indicator that this is a PriceOracle contract (for inspection) bool public constant isPriceOracle = true; /** * @notice Get the underlying price of a cToken asset * @param sToken The cToken to get the underlying price of * @return The underlying asset price mantissa (scaled by 1e18). * Zero means the price is unavailable. */ function getUnderlyingPrice(CToken sToken) external view returns (uint); } library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the addition of two unsigned integers, reverting with custom message on overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * - Addition cannot overflow. */ function add(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, errorMessage); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on underflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot underflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction underflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on underflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot underflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, errorMessage); return c; } /** * @dev Returns the integer division of two unsigned integers. * Reverts on division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. * Reverts with custom message on division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { // Solidity only automatically asserts when dividing by 0 require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } contract Unitroller is UnitrollerAdminStorage, ComptrollerErrorReporter { /** * @notice Emitted when pendingComptrollerImplementation is changed */ event NewPendingImplementation(address oldPendingImplementation, address newPendingImplementation); /** * @notice Emitted when pendingComptrollerImplementation is accepted, which means comptroller implementation is updated */ event NewImplementation(address oldImplementation, address newImplementation); /** * @notice Emitted when pendingAdmin is changed */ event NewPendingAdmin(address oldPendingAdmin, address newPendingAdmin); /** * @notice Emitted when pendingAdmin is accepted, which means admin is updated */ event NewAdmin(address oldAdmin, address newAdmin); constructor() public { // Set admin to caller admin = msg.sender; } /*** Admin Functions ***/ function _setPendingImplementation(address newPendingImplementation) public returns (uint) { if (msg.sender != admin) { return fail(Error.UNAUTHORIZED, FailureInfo.SET_PENDING_IMPLEMENTATION_OWNER_CHECK); } address oldPendingImplementation = pendingComptrollerImplementation; pendingComptrollerImplementation = newPendingImplementation; emit NewPendingImplementation(oldPendingImplementation, pendingComptrollerImplementation); return uint(Error.NO_ERROR); } /** * @notice Accepts new implementation of comptroller. msg.sender must be pendingImplementation * @dev Admin function for new implementation to accept it's role as implementation * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _acceptImplementation() public returns (uint) { // Check caller is pendingImplementation and pendingImplementation ≠ address(0) if (msg.sender != pendingComptrollerImplementation || pendingComptrollerImplementation == address(0)) { return fail(Error.UNAUTHORIZED, FailureInfo.ACCEPT_PENDING_IMPLEMENTATION_ADDRESS_CHECK); } // Save current values for inclusion in log address oldImplementation = comptrollerImplementation; address oldPendingImplementation = pendingComptrollerImplementation; comptrollerImplementation = pendingComptrollerImplementation; pendingComptrollerImplementation = address(0); emit NewImplementation(oldImplementation, comptrollerImplementation); emit NewPendingImplementation(oldPendingImplementation, pendingComptrollerImplementation); return uint(Error.NO_ERROR); } /** * @notice Begins transfer of admin rights. The newPendingAdmin must call `_acceptAdmin` to finalize the transfer. * @dev Admin function to begin change of admin. The newPendingAdmin must call `_acceptAdmin` to finalize the transfer. * @param newPendingAdmin New pending admin. * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _setPendingAdmin(address newPendingAdmin) public returns (uint) { // Check caller = admin if (msg.sender != admin) { return fail(Error.UNAUTHORIZED, FailureInfo.SET_PENDING_ADMIN_OWNER_CHECK); } // Save current value, if any, for inclusion in log address oldPendingAdmin = pendingAdmin; // Store pendingAdmin with value newPendingAdmin pendingAdmin = newPendingAdmin; // Emit NewPendingAdmin(oldPendingAdmin, newPendingAdmin) emit NewPendingAdmin(oldPendingAdmin, newPendingAdmin); return uint(Error.NO_ERROR); } /** * @notice Accepts transfer of admin rights. msg.sender must be pendingAdmin * @dev Admin function for pending admin to accept role and update admin * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _acceptAdmin() public returns (uint) { // Check caller is pendingAdmin and pendingAdmin ≠ address(0) if (msg.sender != pendingAdmin || msg.sender == address(0)) { return fail(Error.UNAUTHORIZED, FailureInfo.ACCEPT_ADMIN_PENDING_ADMIN_CHECK); } // Save current values for inclusion in log address oldAdmin = admin; address oldPendingAdmin = pendingAdmin; // Store admin with value pendingAdmin admin = pendingAdmin; // Clear the pending value pendingAdmin = address(0); emit NewAdmin(oldAdmin, admin); emit NewPendingAdmin(oldPendingAdmin, pendingAdmin); return uint(Error.NO_ERROR); } /** * @dev Delegates execution to an implementation contract. * It returns to the external caller whatever the implementation returns * or forwards reverts. */ function () payable external { // delegate all other functions to current implementation (bool success, ) = comptrollerImplementation.delegatecall(msg.data); assembly { let free_mem_ptr := mload(0x40) returndatacopy(free_mem_ptr, 0, returndatasize) switch success case 0 { revert(free_mem_ptr, returndatasize) } default { return(free_mem_ptr, returndatasize) } } } } contract CErc20Delegator is CTokenInterface, CErc20Interface, CDelegatorInterface { /** * @notice Construct a new money market * @param underlying_ The address of the underlying asset * @param comptroller_ The address of the Comptroller * @param interestRateModel_ The address of the interest rate model * @param initialExchangeRateMantissa_ The initial exchange rate, scaled by 1e18 * @param name_ ERC-20 name of this token * @param symbol_ ERC-20 symbol of this token * @param decimals_ ERC-20 decimal precision of this token * @param admin_ Address of the administrator of this token * @param implementation_ The address of the implementation the contract delegates to * @param becomeImplementationData The encoded args for becomeImplementation */ constructor(address underlying_, ComptrollerInterface comptroller_, InterestRateModel interestRateModel_, uint initialExchangeRateMantissa_, string memory name_, string memory symbol_, uint8 decimals_, address payable admin_, address implementation_, bytes memory becomeImplementationData) public { // Creator of the contract is admin during initialization admin = msg.sender; // First delegate gets to initialize the delegator (i.e. storage contract) delegateTo(implementation_, abi.encodeWithSignature("initialize(address,address,address,uint256,string,string,uint8)", underlying_, comptroller_, interestRateModel_, initialExchangeRateMantissa_, name_, symbol_, decimals_)); // New implementations always get set via the settor (post-initialize) _setImplementation(implementation_, false, becomeImplementationData); // Set the proper admin now that initialization is done admin = admin_; } /** * @notice Called by the admin to update the implementation of the delegator * @param implementation_ The address of the new implementation for delegation * @param allowResign Flag to indicate whether to call _resignImplementation on the old implementation * @param becomeImplementationData The encoded bytes data to be passed to _becomeImplementation */ function _setImplementation(address implementation_, bool allowResign, bytes memory becomeImplementationData) public { require(msg.sender == admin, "CErc20Delegator::_setImplementation: Caller must be admin"); if (allowResign) { delegateToImplementation(abi.encodeWithSignature("_resignImplementation()")); } address oldImplementation = implementation; implementation = implementation_; delegateToImplementation(abi.encodeWithSignature("_becomeImplementation(bytes)", becomeImplementationData)); emit NewImplementation(oldImplementation, implementation); } /** * @notice Sender supplies assets into the market and receives cTokens in exchange * @dev Accrues interest whether or not the operation succeeds, unless reverted * @param mintAmount The amount of the underlying asset to supply * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function mint(uint mintAmount) external returns (uint) { mintAmount; // Shh delegateAndReturn(); } /** * @notice Sender redeems cTokens in exchange for the underlying asset * @dev Accrues interest whether or not the operation succeeds, unless reverted * @param redeemTokens The number of cTokens to redeem into underlying * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function redeem(uint redeemTokens) external returns (uint) { redeemTokens; // Shh delegateAndReturn(); } /** * @notice Sender redeems cTokens in exchange for a specified amount of underlying asset * @dev Accrues interest whether or not the operation succeeds, unless reverted * @param redeemAmount The amount of underlying to redeem * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function redeemUnderlying(uint redeemAmount) external returns (uint) { redeemAmount; // Shh delegateAndReturn(); } /** * @notice Sender borrows assets from the protocol to their own address * @param borrowAmount The amount of the underlying asset to borrow * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function borrow(uint borrowAmount) external returns (uint) { borrowAmount; // Shh delegateAndReturn(); } /** * @notice Sender repays their own borrow * @param repayAmount The amount to repay * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function repayBorrow(uint repayAmount) external returns (uint) { repayAmount; // Shh delegateAndReturn(); } /** * @notice Sender repays a borrow belonging to borrower * @param borrower the account with the debt being payed off * @param repayAmount The amount to repay * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function repayBorrowBehalf(address borrower, uint repayAmount) external returns (uint) { borrower; repayAmount; // Shh delegateAndReturn(); } /** * @notice The sender liquidates the borrowers collateral. * The collateral seized is transferred to the liquidator. * @param borrower The borrower of this cToken to be liquidated * @param cTokenCollateral The market in which to seize collateral from the borrower * @param repayAmount The amount of the underlying borrowed asset to repay * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function liquidateBorrow(address borrower, uint repayAmount, CTokenInterface cTokenCollateral) external returns (uint) { borrower; repayAmount; cTokenCollateral; // Shh delegateAndReturn(); } /** * @notice Transfer `amount` tokens from `msg.sender` to `dst` * @param dst The address of the destination account * @param amount The number of tokens to transfer * @return Whether or not the transfer succeeded */ function transfer(address dst, uint amount) external returns (bool) { dst; amount; // Shh delegateAndReturn(); } /** * @notice Transfer `amount` tokens from `src` to `dst` * @param src The address of the source account * @param dst The address of the destination account * @param amount The number of tokens to transfer * @return Whether or not the transfer succeeded */ function transferFrom(address src, address dst, uint256 amount) external returns (bool) { src; dst; amount; // Shh delegateAndReturn(); } /** * @notice Approve `spender` to transfer up to `amount` from `src` * @dev This will overwrite the approval amount for `spender` * and is subject to issues noted [here](https://eips.ethereum.org/EIPS/eip-20#approve) * @param spender The address of the account which may transfer tokens * @param amount The number of tokens that are approved (-1 means infinite) * @return Whether or not the approval succeeded */ function approve(address spender, uint256 amount) external returns (bool) { spender; amount; // Shh delegateAndReturn(); } /** * @notice Get the current allowance from `owner` for `spender` * @param owner The address of the account which owns the tokens to be spent * @param spender The address of the account which may transfer tokens * @return The number of tokens allowed to be spent (-1 means infinite) */ function allowance(address owner, address spender) external view returns (uint) { owner; spender; // Shh delegateToViewAndReturn(); } /** * @notice Get the token balance of the `owner` * @param owner The address of the account to query * @return The number of tokens owned by `owner` */ function balanceOf(address owner) external view returns (uint) { owner; // Shh delegateToViewAndReturn(); } /** * @notice Get the underlying balance of the `owner` * @dev This also accrues interest in a transaction * @param owner The address of the account to query * @return The amount of underlying owned by `owner` */ function balanceOfUnderlying(address owner) external returns (uint) { owner; // Shh delegateAndReturn(); } /** * @notice Get a snapshot of the account's balances, and the cached exchange rate * @dev This is used by comptroller to more efficiently perform liquidity checks. * @param account Address of the account to snapshot * @return (possible error, token balance, borrow balance, exchange rate mantissa) */ function getAccountSnapshot(address account) external view returns (uint, uint, uint, uint) { account; // Shh delegateToViewAndReturn(); } /** * @notice Returns the current per-block borrow interest rate for this cToken * @return The borrow interest rate per block, scaled by 1e18 */ function borrowRatePerBlock() external view returns (uint) { delegateToViewAndReturn(); } /** * @notice Returns the current per-block supply interest rate for this cToken * @return The supply interest rate per block, scaled by 1e18 */ function supplyRatePerBlock() external view returns (uint) { delegateToViewAndReturn(); } /** * @notice Returns the current total borrows plus accrued interest * @return The total borrows with interest */ function totalBorrowsCurrent() external returns (uint) { delegateAndReturn(); } /** * @notice Accrue interest to updated borrowIndex and then calculate account's borrow balance using the updated borrowIndex * @param account The address whose balance should be calculated after updating borrowIndex * @return The calculated balance */ function borrowBalanceCurrent(address account) external returns (uint) { account; // Shh delegateAndReturn(); } /** * @notice Return the borrow balance of account based on stored data * @param account The address whose balance should be calculated * @return The calculated balance */ function borrowBalanceStored(address account) public view returns (uint) { account; // Shh delegateToViewAndReturn(); } /** * @notice Accrue interest then return the up-to-date exchange rate * @return Calculated exchange rate scaled by 1e18 */ function exchangeRateCurrent() public returns (uint) { delegateAndReturn(); } /** * @notice Calculates the exchange rate from the underlying to the CToken * @dev This function does not accrue interest before calculating the exchange rate * @return Calculated exchange rate scaled by 1e18 */ function exchangeRateStored() public view returns (uint) { delegateToViewAndReturn(); } /** * @notice Get cash balance of this cToken in the underlying asset * @return The quantity of underlying asset owned by this contract */ function getCash() external view returns (uint) { delegateToViewAndReturn(); } /** * @notice Applies accrued interest to total borrows and reserves. * @dev This calculates interest accrued from the last checkpointed block * up to the current block and writes new checkpoint to storage. */ function accrueInterest() public returns (uint) { delegateAndReturn(); } /** * @notice Transfers collateral tokens (this market) to the liquidator. * @dev Will fail unless called by another cToken during the process of liquidation. * Its absolutely critical to use msg.sender as the borrowed cToken and not a parameter. * @param liquidator The account receiving seized collateral * @param borrower The account having collateral seized * @param seizeTokens The number of cTokens to seize * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function seize(address liquidator, address borrower, uint seizeTokens) external returns (uint) { liquidator; borrower; seizeTokens; // Shh delegateAndReturn(); } /*** Admin Functions ***/ /** * @notice Begins transfer of admin rights. The newPendingAdmin must call `_acceptAdmin` to finalize the transfer. * @dev Admin function to begin change of admin. The newPendingAdmin must call `_acceptAdmin` to finalize the transfer. * @param newPendingAdmin New pending admin. * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _setPendingAdmin(address payable newPendingAdmin) external returns (uint) { newPendingAdmin; // Shh delegateAndReturn(); } /** * @notice Sets a new comptroller for the market * @dev Admin function to set a new comptroller * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _setComptroller(ComptrollerInterface newComptroller) public returns (uint) { newComptroller; // Shh delegateAndReturn(); } /** * @notice accrues interest and sets a new reserve factor for the protocol using _setReserveFactorFresh * @dev Admin function to accrue interest and set a new reserve factor * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _setReserveFactor(uint newReserveFactorMantissa) external returns (uint) { newReserveFactorMantissa; // Shh delegateAndReturn(); } /** * @notice Accepts transfer of admin rights. msg.sender must be pendingAdmin * @dev Admin function for pending admin to accept role and update admin * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _acceptAdmin() external returns (uint) { delegateAndReturn(); } /** * @notice Accrues interest and adds reserves by transferring from admin * @param addAmount Amount of reserves to add * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _addReserves(uint addAmount) external returns (uint) { addAmount; // Shh delegateAndReturn(); } /** * @notice Accrues interest and reduces reserves by transferring to admin * @param reduceAmount Amount of reduction to reserves * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _reduceReserves(uint reduceAmount) external returns (uint) { reduceAmount; // Shh delegateAndReturn(); } /** * @notice Accrues interest and updates the interest rate model using _setInterestRateModelFresh * @dev Admin function to accrue interest and update the interest rate model * @param newInterestRateModel the new interest rate model to use * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _setInterestRateModel(InterestRateModel newInterestRateModel) public returns (uint) { newInterestRateModel; // Shh delegateAndReturn(); } /** * @notice Internal method to delegate execution to another contract * @dev It returns to the external caller whatever the implementation returns or forwards reverts * @param callee The contract to delegatecall * @param data The raw data to delegatecall * @return The returned bytes from the delegatecall */ function delegateTo(address callee, bytes memory data) internal returns (bytes memory) { (bool success, bytes memory returnData) = callee.delegatecall(data); assembly { if eq(success, 0) { revert(add(returnData, 0x20), returndatasize) } } return returnData; } /** * @notice Delegates execution to the implementation contract * @dev It returns to the external caller whatever the implementation returns or forwards reverts * @param data The raw data to delegatecall * @return The returned bytes from the delegatecall */ function delegateToImplementation(bytes memory data) public returns (bytes memory) { return delegateTo(implementation, data); } /** * @notice Delegates execution to an implementation contract * @dev It returns to the external caller whatever the implementation returns or forwards reverts * There are an additional 2 prefix uints from the wrapper returndata, which we ignore since we make an extra hop. * @param data The raw data to delegatecall * @return The returned bytes from the delegatecall */ function delegateToViewImplementation(bytes memory data) public view returns (bytes memory) { (bool success, bytes memory returnData) = address(this).staticcall(abi.encodeWithSignature("delegateToImplementation(bytes)", data)); assembly { if eq(success, 0) { revert(add(returnData, 0x20), returndatasize) } } return abi.decode(returnData, (bytes)); } function delegateToViewAndReturn() private view returns (bytes memory) { (bool success, ) = address(this).staticcall(abi.encodeWithSignature("delegateToImplementation(bytes)", msg.data)); assembly { let free_mem_ptr := mload(0x40) returndatacopy(free_mem_ptr, 0, returndatasize) switch success case 0 { revert(free_mem_ptr, returndatasize) } default { return(add(free_mem_ptr, 0x40), returndatasize) } } } function delegateAndReturn() private returns (bytes memory) { (bool success, ) = implementation.delegatecall(msg.data); assembly { let free_mem_ptr := mload(0x40) returndatacopy(free_mem_ptr, 0, returndatasize) switch success case 0 { revert(free_mem_ptr, returndatasize) } default { return(free_mem_ptr, returndatasize) } } } /** * @notice Delegates execution to an implementation contract * @dev It returns to the external caller whatever the implementation returns or forwards reverts */ function () external payable { require(msg.value == 0,"CErc20Delegator:fallback: cannot send value to fallback"); // delegate all other functions to current implementation delegateAndReturn(); } } contract CToken is CTokenInterface, Exponential, TokenErrorReporter { /** * @notice Initialize the money market * @param comptroller_ The address of the Comptroller * @param interestRateModel_ The address of the interest rate model * @param initialExchangeRateMantissa_ The initial exchange rate, scaled by 1e18 * @param name_ EIP-20 name of this token * @param symbol_ EIP-20 symbol of this token * @param decimals_ EIP-20 decimal precision of this token */ function initialize(ComptrollerInterface comptroller_, InterestRateModel interestRateModel_, uint initialExchangeRateMantissa_, string memory name_, string memory symbol_, uint8 decimals_) public { require(msg.sender == admin, "only admin may initialize the market"); require(accrualBlockNumber == 0 && borrowIndex == 0, "market may only be initialized once"); // Set initial exchange rate initialExchangeRateMantissa = initialExchangeRateMantissa_; require(initialExchangeRateMantissa > 0, "initial exchange rate must be greater than zero."); // Set the comptroller uint err = _setComptroller(comptroller_); require(err == uint(Error.NO_ERROR), "setting comptroller failed"); // Initialize block number and borrow index (block number mocks depend on comptroller being set) accrualBlockNumber = getBlockNumber(); borrowIndex = mantissaOne; // Set the interest rate model (depends on block number / borrow index) err = _setInterestRateModelFresh(interestRateModel_); require(err == uint(Error.NO_ERROR), "setting interest rate model failed"); name = name_; symbol = symbol_; decimals = decimals_; // The counter starts true to prevent changing it from zero to non-zero (i.e. smaller cost/refund) _notEntered = true; } /** * @notice Transfer `tokens` tokens from `src` to `dst` by `spender` * @dev Called by both `transfer` and `transferFrom` internally * @param spender The address of the account performing the transfer * @param src The address of the source account * @param dst The address of the destination account * @param tokens The number of tokens to transfer * @return Whether or not the transfer succeeded */ function transferTokens(address spender, address src, address dst, uint tokens) internal returns (uint) { /* Fail if transfer not allowed */ uint allowed = comptroller.transferAllowed(address(this), src, dst, tokens); if (allowed != 0) { return failOpaque(Error.COMPTROLLER_REJECTION, FailureInfo.TRANSFER_COMPTROLLER_REJECTION, allowed); } /* Do not allow self-transfers */ if (src == dst) { return fail(Error.BAD_INPUT, FailureInfo.TRANSFER_NOT_ALLOWED); } /* Get the allowance, infinite for the account owner */ uint startingAllowance = 0; if (spender == src) { startingAllowance = uint(-1); } else { startingAllowance = transferAllowances[src][spender]; } /* Do the calculations, checking for {under,over}flow */ MathError mathErr; uint allowanceNew; uint srcTokensNew; uint dstTokensNew; (mathErr, allowanceNew) = subUInt(startingAllowance, tokens); if (mathErr != MathError.NO_ERROR) { return fail(Error.MATH_ERROR, FailureInfo.TRANSFER_NOT_ALLOWED); } (mathErr, srcTokensNew) = subUInt(accountTokens[src], tokens); if (mathErr != MathError.NO_ERROR) { return fail(Error.MATH_ERROR, FailureInfo.TRANSFER_NOT_ENOUGH); } (mathErr, dstTokensNew) = addUInt(accountTokens[dst], tokens); if (mathErr != MathError.NO_ERROR) { return fail(Error.MATH_ERROR, FailureInfo.TRANSFER_TOO_MUCH); } ///////////////////////// // EFFECTS & INTERACTIONS // (No safe failures beyond this point) accountTokens[src] = srcTokensNew; accountTokens[dst] = dstTokensNew; /* Eat some of the allowance (if necessary) */ if (startingAllowance != uint(-1)) { transferAllowances[src][spender] = allowanceNew; } /* We emit a Transfer event */ emit Transfer(src, dst, tokens); comptroller.transferVerify(address(this), src, dst, tokens); return uint(Error.NO_ERROR); } /** * @notice Transfer `amount` tokens from `msg.sender` to `dst` * @param dst The address of the destination account * @param amount The number of tokens to transfer * @return Whether or not the transfer succeeded */ function transfer(address dst, uint256 amount) external nonReentrant returns (bool) { return transferTokens(msg.sender, msg.sender, dst, amount) == uint(Error.NO_ERROR); } /** * @notice Transfer `amount` tokens from `src` to `dst` * @param src The address of the source account * @param dst The address of the destination account * @param amount The number of tokens to transfer * @return Whether or not the transfer succeeded */ function transferFrom(address src, address dst, uint256 amount) external nonReentrant returns (bool) { return transferTokens(msg.sender, src, dst, amount) == uint(Error.NO_ERROR); } /** * @notice Approve `spender` to transfer up to `amount` from `src` * @dev This will overwrite the approval amount for `spender` * and is subject to issues noted [here](https://eips.ethereum.org/EIPS/eip-20#approve) * @param spender The address of the account which may transfer tokens * @param amount The number of tokens that are approved (-1 means infinite) * @return Whether or not the approval succeeded */ function approve(address spender, uint256 amount) external returns (bool) { address src = msg.sender; transferAllowances[src][spender] = amount; emit Approval(src, spender, amount); return true; } /** * @notice Get the current allowance from `owner` for `spender` * @param owner The address of the account which owns the tokens to be spent * @param spender The address of the account which may transfer tokens * @return The number of tokens allowed to be spent (-1 means infinite) */ function allowance(address owner, address spender) external view returns (uint256) { return transferAllowances[owner][spender]; } /** * @notice Get the token balance of the `owner` * @param owner The address of the account to query * @return The number of tokens owned by `owner` */ function balanceOf(address owner) external view returns (uint256) { return accountTokens[owner]; } /** * @notice Get the underlying balance of the `owner` * @dev This also accrues interest in a transaction * @param owner The address of the account to query * @return The amount of underlying owned by `owner` */ function balanceOfUnderlying(address owner) external returns (uint) { Exp memory exchangeRate = Exp({mantissa: exchangeRateCurrent()}); (MathError mErr, uint balance) = mulScalarTruncate(exchangeRate, accountTokens[owner]); require(mErr == MathError.NO_ERROR, "balance could not be calculated"); return balance; } /** * @notice Get a snapshot of the account's balances, and the cached exchange rate * @dev This is used by comptroller to more efficiently perform liquidity checks. * @param account Address of the account to snapshot * @return (possible error, token balance, borrow balance, exchange rate mantissa) */ function getAccountSnapshot(address account) external view returns (uint, uint, uint, uint) { uint cTokenBalance = accountTokens[account]; uint borrowBalance; uint exchangeRateMantissa; MathError mErr; (mErr, borrowBalance) = borrowBalanceStoredInternal(account); if (mErr != MathError.NO_ERROR) { return (uint(Error.MATH_ERROR), 0, 0, 0); } (mErr, exchangeRateMantissa) = exchangeRateStoredInternal(); if (mErr != MathError.NO_ERROR) { return (uint(Error.MATH_ERROR), 0, 0, 0); } return (uint(Error.NO_ERROR), cTokenBalance, borrowBalance, exchangeRateMantissa); } /** * @dev Function to simply retrieve block number * This exists mainly for inheriting test contracts to stub this result. */ function getBlockNumber() internal view returns (uint) { return block.number; } /** * @notice Returns the current per-block borrow interest rate for this cToken * @return The borrow interest rate per block, scaled by 1e18 */ function borrowRatePerBlock() external view returns (uint) { return interestRateModel.getBorrowRate(getCashPrior(), totalBorrows, totalReserves); } /** * @notice Returns the current per-block supply interest rate for this cToken * @return The supply interest rate per block, scaled by 1e18 */ function supplyRatePerBlock() external view returns (uint) { return interestRateModel.getSupplyRate(getCashPrior(), totalBorrows, totalReserves, reserveFactorMantissa); } /** * @notice Returns the current total borrows plus accrued interest * @return The total borrows with interest */ function totalBorrowsCurrent() external nonReentrant returns (uint) { require(accrueInterest() == uint(Error.NO_ERROR), "accrue interest failed"); return totalBorrows; } /** * @notice Accrue interest to updated borrowIndex and then calculate account's borrow balance using the updated borrowIndex * @param account The address whose balance should be calculated after updating borrowIndex * @return The calculated balance */ function borrowBalanceCurrent(address account) external nonReentrant returns (uint) { require(accrueInterest() == uint(Error.NO_ERROR), "accrue interest failed"); return borrowBalanceStored(account); } /** * @notice Return the borrow balance of account based on stored data * @param account The address whose balance should be calculated * @return The calculated balance */ function borrowBalanceStored(address account) public view returns (uint) { (MathError err, uint result) = borrowBalanceStoredInternal(account); require(err == MathError.NO_ERROR, "borrowBalanceStored: borrowBalanceStoredInternal failed"); return result; } /** * @notice Return the borrow balance of account based on stored data * @param account The address whose balance should be calculated * @return (error code, the calculated balance or 0 if error code is non-zero) */ function borrowBalanceStoredInternal(address account) internal view returns (MathError, uint) { /* Note: we do not assert that the market is up to date */ MathError mathErr; uint principalTimesIndex; uint result; /* Get borrowBalance and borrowIndex */ BorrowSnapshot storage borrowSnapshot = accountBorrows[account]; /* If borrowBalance = 0 then borrowIndex is likely also 0. * Rather than failing the calculation with a division by 0, we immediately return 0 in this case. */ if (borrowSnapshot.principal == 0) { return (MathError.NO_ERROR, 0); } /* Calculate new borrow balance using the interest index: * recentBorrowBalance = borrower.borrowBalance * market.borrowIndex / borrower.borrowIndex */ (mathErr, principalTimesIndex) = mulUInt(borrowSnapshot.principal, borrowIndex); if (mathErr != MathError.NO_ERROR) { return (mathErr, 0); } (mathErr, result) = divUInt(principalTimesIndex, borrowSnapshot.interestIndex); if (mathErr != MathError.NO_ERROR) { return (mathErr, 0); } return (MathError.NO_ERROR, result); } /** * @notice Accrue interest then return the up-to-date exchange rate * @return Calculated exchange rate scaled by 1e18 */ function exchangeRateCurrent() public nonReentrant returns (uint) { require(accrueInterest() == uint(Error.NO_ERROR), "accrue interest failed"); return exchangeRateStored(); } /** * @notice Calculates the exchange rate from the underlying to the CToken * @dev This function does not accrue interest before calculating the exchange rate * @return Calculated exchange rate scaled by 1e18 */ function exchangeRateStored() public view returns (uint) { (MathError err, uint result) = exchangeRateStoredInternal(); require(err == MathError.NO_ERROR, "exchangeRateStored: exchangeRateStoredInternal failed"); return result; } /** * @notice Calculates the exchange rate from the underlying to the CToken * @dev This function does not accrue interest before calculating the exchange rate * @return (error code, calculated exchange rate scaled by 1e18) */ function exchangeRateStoredInternal() internal view returns (MathError, uint) { uint _totalSupply = totalSupply; if (_totalSupply == 0) { /* * If there are no tokens minted: * exchangeRate = initialExchangeRate */ return (MathError.NO_ERROR, initialExchangeRateMantissa); } else { /* * Otherwise: * exchangeRate = (totalCash + totalBorrows - totalReserves) / totalSupply */ uint totalCash = getCashPrior(); uint cashPlusBorrowsMinusReserves; Exp memory exchangeRate; MathError mathErr; (mathErr, cashPlusBorrowsMinusReserves) = addThenSubUInt(totalCash, totalBorrows, totalReserves); if (mathErr != MathError.NO_ERROR) { return (mathErr, 0); } (mathErr, exchangeRate) = getExp(cashPlusBorrowsMinusReserves, _totalSupply); if (mathErr != MathError.NO_ERROR) { return (mathErr, 0); } return (MathError.NO_ERROR, exchangeRate.mantissa); } } /** * @notice Get cash balance of this cToken in the underlying asset * @return The quantity of underlying asset owned by this contract */ function getCash() external view returns (uint) { return getCashPrior(); } /** * @notice Applies accrued interest to total borrows and reserves * @dev This calculates interest accrued from the last checkpointed block * up to the current block and writes new checkpoint to storage. */ function accrueInterest() public returns (uint) { /* Remember the initial block number */ uint currentBlockNumber = getBlockNumber(); uint accrualBlockNumberPrior = accrualBlockNumber; /* Short-circuit accumulating 0 interest */ if (accrualBlockNumberPrior == currentBlockNumber) { return uint(Error.NO_ERROR); } /* Read the previous values out of storage */ uint cashPrior = getCashPrior(); uint borrowsPrior = totalBorrows; uint reservesPrior = totalReserves; uint borrowIndexPrior = borrowIndex; /* Calculate the current borrow interest rate */ uint borrowRateMantissa = interestRateModel.getBorrowRate(cashPrior, borrowsPrior, reservesPrior); require(borrowRateMantissa <= borrowRateMaxMantissa, "borrow rate is absurdly high"); /* Calculate the number of blocks elapsed since the last accrual */ (MathError mathErr, uint blockDelta) = subUInt(currentBlockNumber, accrualBlockNumberPrior); require(mathErr == MathError.NO_ERROR, "could not calculate block delta"); /* * Calculate the interest accumulated into borrows and reserves and the new index: * simpleInterestFactor = borrowRate * blockDelta * interestAccumulated = simpleInterestFactor * totalBorrows * totalBorrowsNew = interestAccumulated + totalBorrows * totalReservesNew = interestAccumulated * reserveFactor + totalReserves * borrowIndexNew = simpleInterestFactor * borrowIndex + borrowIndex */ Exp memory simpleInterestFactor; uint interestAccumulated; uint totalBorrowsNew; uint totalReservesNew; uint borrowIndexNew; (mathErr, simpleInterestFactor) = mulScalar(Exp({mantissa: borrowRateMantissa}), blockDelta); if (mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.ACCRUE_INTEREST_SIMPLE_INTEREST_FACTOR_CALCULATION_FAILED, uint(mathErr)); } (mathErr, interestAccumulated) = mulScalarTruncate(simpleInterestFactor, borrowsPrior); if (mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.ACCRUE_INTEREST_ACCUMULATED_INTEREST_CALCULATION_FAILED, uint(mathErr)); } (mathErr, totalBorrowsNew) = addUInt(interestAccumulated, borrowsPrior); if (mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.ACCRUE_INTEREST_NEW_TOTAL_BORROWS_CALCULATION_FAILED, uint(mathErr)); } (mathErr, totalReservesNew) = mulScalarTruncateAddUInt(Exp({mantissa: reserveFactorMantissa}), interestAccumulated, reservesPrior); if (mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.ACCRUE_INTEREST_NEW_TOTAL_RESERVES_CALCULATION_FAILED, uint(mathErr)); } (mathErr, borrowIndexNew) = mulScalarTruncateAddUInt(simpleInterestFactor, borrowIndexPrior, borrowIndexPrior); if (mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.ACCRUE_INTEREST_NEW_BORROW_INDEX_CALCULATION_FAILED, uint(mathErr)); } ///////////////////////// // EFFECTS & INTERACTIONS // (No safe failures beyond this point) /* We write the previously calculated values into storage */ accrualBlockNumber = currentBlockNumber; borrowIndex = borrowIndexNew; totalBorrows = totalBorrowsNew; totalReserves = totalReservesNew; /* We emit an AccrueInterest event */ emit AccrueInterest(cashPrior, interestAccumulated, borrowIndexNew, totalBorrowsNew); return uint(Error.NO_ERROR); } /** * @notice Sender supplies assets into the market and receives cTokens in exchange * @dev Accrues interest whether or not the operation succeeds, unless reverted * @param mintAmount The amount of the underlying asset to supply * @return (uint, uint) An error code (0=success, otherwise a failure, see ErrorReporter.sol), and the actual mint amount. */ function mintInternal(uint mintAmount) internal nonReentrant returns (uint, uint) { uint error = accrueInterest(); if (error != uint(Error.NO_ERROR)) { // accrueInterest emits logs on errors, but we still want to log the fact that an attempted borrow failed return (fail(Error(error), FailureInfo.MINT_ACCRUE_INTEREST_FAILED), 0); } // mintFresh emits the actual Mint event if successful and logs on errors, so we don't need to return mintFresh(msg.sender, mintAmount); } struct MintLocalVars { Error err; MathError mathErr; uint exchangeRateMantissa; uint mintTokens; uint totalSupplyNew; uint accountTokensNew; uint actualMintAmount; } /** * @notice User supplies assets into the market and receives cTokens in exchange * @dev Assumes interest has already been accrued up to the current block * @param minter The address of the account which is supplying the assets * @param mintAmount The amount of the underlying asset to supply * @return (uint, uint) An error code (0=success, otherwise a failure, see ErrorReporter.sol), and the actual mint amount. */ function mintFresh(address minter, uint mintAmount) internal returns (uint, uint) { /* Fail if mint not allowed */ uint allowed = comptroller.mintAllowed(address(this), minter, mintAmount); if (allowed != 0) { return (failOpaque(Error.COMPTROLLER_REJECTION, FailureInfo.MINT_COMPTROLLER_REJECTION, allowed), 0); } /* Verify market's block number equals current block number */ if (accrualBlockNumber != getBlockNumber()) { return (fail(Error.MARKET_NOT_FRESH, FailureInfo.MINT_FRESHNESS_CHECK), 0); } MintLocalVars memory vars; (vars.mathErr, vars.exchangeRateMantissa) = exchangeRateStoredInternal(); if (vars.mathErr != MathError.NO_ERROR) { return (failOpaque(Error.MATH_ERROR, FailureInfo.MINT_EXCHANGE_RATE_READ_FAILED, uint(vars.mathErr)), 0); } ///////////////////////// // EFFECTS & INTERACTIONS // (No safe failures beyond this point) /* * We call `doTransferIn` for the minter and the mintAmount. * Note: The cToken must handle variations between ERC-20 and ETH underlying. * `doTransferIn` reverts if anything goes wrong, since we can't be sure if * side-effects occurred. The function returns the amount actually transferred, * in case of a fee. On success, the cToken holds an additional `actualMintAmount` * of cash. */ vars.actualMintAmount = doTransferIn(minter, mintAmount); /* * We get the current exchange rate and calculate the number of cTokens to be minted: * mintTokens = actualMintAmount / exchangeRate */ (vars.mathErr, vars.mintTokens) = divScalarByExpTruncate(vars.actualMintAmount, Exp({mantissa: vars.exchangeRateMantissa})); require(vars.mathErr == MathError.NO_ERROR, "MINT_EXCHANGE_CALCULATION_FAILED"); /* * We calculate the new total supply of cTokens and minter token balance, checking for overflow: * totalSupplyNew = totalSupply + mintTokens * accountTokensNew = accountTokens[minter] + mintTokens */ (vars.mathErr, vars.totalSupplyNew) = addUInt(totalSupply, vars.mintTokens); require(vars.mathErr == MathError.NO_ERROR, "MINT_NEW_TOTAL_SUPPLY_CALCULATION_FAILED"); (vars.mathErr, vars.accountTokensNew) = addUInt(accountTokens[minter], vars.mintTokens); require(vars.mathErr == MathError.NO_ERROR, "MINT_NEW_ACCOUNT_BALANCE_CALCULATION_FAILED"); /* We write previously calculated values into storage */ totalSupply = vars.totalSupplyNew; accountTokens[minter] = vars.accountTokensNew; /* We emit a Mint event, and a Transfer event */ emit Mint(minter, vars.actualMintAmount, vars.mintTokens); emit Transfer(address(this), minter, vars.mintTokens); /* We call the defense hook */ comptroller.mintVerify(address(this), minter, vars.actualMintAmount, vars.mintTokens); return (uint(Error.NO_ERROR), vars.actualMintAmount); } /** * @notice Sender redeems cTokens in exchange for the underlying asset * @dev Accrues interest whether or not the operation succeeds, unless reverted * @param redeemTokens The number of cTokens to redeem into underlying * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function redeemInternal(uint redeemTokens) internal nonReentrant returns (uint) { uint error = accrueInterest(); if (error != uint(Error.NO_ERROR)) { // accrueInterest emits logs on errors, but we still want to log the fact that an attempted redeem failed return fail(Error(error), FailureInfo.REDEEM_ACCRUE_INTEREST_FAILED); } // redeemFresh emits redeem-specific logs on errors, so we don't need to return redeemFresh(msg.sender, redeemTokens, 0); } /** * @notice Sender redeems cTokens in exchange for a specified amount of underlying asset * @dev Accrues interest whether or not the operation succeeds, unless reverted * @param redeemAmount The amount of underlying to receive from redeeming cTokens * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function redeemUnderlyingInternal(uint redeemAmount) internal nonReentrant returns (uint) { uint error = accrueInterest(); if (error != uint(Error.NO_ERROR)) { // accrueInterest emits logs on errors, but we still want to log the fact that an attempted redeem failed return fail(Error(error), FailureInfo.REDEEM_ACCRUE_INTEREST_FAILED); } // redeemFresh emits redeem-specific logs on errors, so we don't need to return redeemFresh(msg.sender, 0, redeemAmount); } struct RedeemLocalVars { Error err; MathError mathErr; uint exchangeRateMantissa; uint redeemTokens; uint redeemAmount; uint totalSupplyNew; uint accountTokensNew; } /** * @notice User redeems cTokens in exchange for the underlying asset * @dev Assumes interest has already been accrued up to the current block * @param redeemer The address of the account which is redeeming the tokens * @param redeemTokensIn The number of cTokens to redeem into underlying (only one of redeemTokensIn or redeemAmountIn may be non-zero) * @param redeemAmountIn The number of underlying tokens to receive from redeeming cTokens (only one of redeemTokensIn or redeemAmountIn may be non-zero) * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function redeemFresh(address payable redeemer, uint redeemTokensIn, uint redeemAmountIn) internal returns (uint) { require(redeemTokensIn == 0 || redeemAmountIn == 0, "one of redeemTokensIn or redeemAmountIn must be zero"); RedeemLocalVars memory vars; /* exchangeRate = invoke Exchange Rate Stored() */ (vars.mathErr, vars.exchangeRateMantissa) = exchangeRateStoredInternal(); if (vars.mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.REDEEM_EXCHANGE_RATE_READ_FAILED, uint(vars.mathErr)); } /* If redeemTokensIn > 0: */ if (redeemTokensIn > 0) { /* * We calculate the exchange rate and the amount of underlying to be redeemed: * redeemTokens = redeemTokensIn * redeemAmount = redeemTokensIn x exchangeRateCurrent */ vars.redeemTokens = redeemTokensIn; (vars.mathErr, vars.redeemAmount) = mulScalarTruncate(Exp({mantissa: vars.exchangeRateMantissa}), redeemTokensIn); if (vars.mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.REDEEM_EXCHANGE_TOKENS_CALCULATION_FAILED, uint(vars.mathErr)); } } else { /* * We get the current exchange rate and calculate the amount to be redeemed: * redeemTokens = redeemAmountIn / exchangeRate * redeemAmount = redeemAmountIn */ (vars.mathErr, vars.redeemTokens) = divScalarByExpTruncate(redeemAmountIn, Exp({mantissa: vars.exchangeRateMantissa})); if (vars.mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.REDEEM_EXCHANGE_AMOUNT_CALCULATION_FAILED, uint(vars.mathErr)); } vars.redeemAmount = redeemAmountIn; } /* Fail if redeem not allowed */ uint allowed = comptroller.redeemAllowed(address(this), redeemer, vars.redeemTokens); if (allowed != 0) { return failOpaque(Error.COMPTROLLER_REJECTION, FailureInfo.REDEEM_COMPTROLLER_REJECTION, allowed); } /* Verify market's block number equals current block number */ if (accrualBlockNumber != getBlockNumber()) { return fail(Error.MARKET_NOT_FRESH, FailureInfo.REDEEM_FRESHNESS_CHECK); } /* * We calculate the new total supply and redeemer balance, checking for underflow: * totalSupplyNew = totalSupply - redeemTokens * accountTokensNew = accountTokens[redeemer] - redeemTokens */ (vars.mathErr, vars.totalSupplyNew) = subUInt(totalSupply, vars.redeemTokens); if (vars.mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.REDEEM_NEW_TOTAL_SUPPLY_CALCULATION_FAILED, uint(vars.mathErr)); } (vars.mathErr, vars.accountTokensNew) = subUInt(accountTokens[redeemer], vars.redeemTokens); if (vars.mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.REDEEM_NEW_ACCOUNT_BALANCE_CALCULATION_FAILED, uint(vars.mathErr)); } /* Fail gracefully if protocol has insufficient cash */ if (getCashPrior() < vars.redeemAmount) { return fail(Error.TOKEN_INSUFFICIENT_CASH, FailureInfo.REDEEM_TRANSFER_OUT_NOT_POSSIBLE); } ///////////////////////// // EFFECTS & INTERACTIONS // (No safe failures beyond this point) /* * We invoke doTransferOut for the redeemer and the redeemAmount. * Note: The cToken must handle variations between ERC-20 and ETH underlying. * On success, the cToken has redeemAmount less of cash. * doTransferOut reverts if anything goes wrong, since we can't be sure if side effects occurred. */ doTransferOut(redeemer, vars.redeemAmount); /* We write previously calculated values into storage */ totalSupply = vars.totalSupplyNew; accountTokens[redeemer] = vars.accountTokensNew; /* We emit a Transfer event, and a Redeem event */ emit Transfer(redeemer, address(this), vars.redeemTokens); emit Redeem(redeemer, vars.redeemAmount, vars.redeemTokens); /* We call the defense hook */ comptroller.redeemVerify(address(this), redeemer, vars.redeemAmount, vars.redeemTokens); return uint(Error.NO_ERROR); } /** * @notice Sender borrows assets from the protocol to their own address * @param borrowAmount The amount of the underlying asset to borrow * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function borrowInternal(uint borrowAmount) internal nonReentrant returns (uint) { uint error = accrueInterest(); if (error != uint(Error.NO_ERROR)) { // accrueInterest emits logs on errors, but we still want to log the fact that an attempted borrow failed return fail(Error(error), FailureInfo.BORROW_ACCRUE_INTEREST_FAILED); } // borrowFresh emits borrow-specific logs on errors, so we don't need to return borrowFresh(msg.sender, borrowAmount); } struct BorrowLocalVars { MathError mathErr; uint accountBorrows; uint accountBorrowsNew; uint totalBorrowsNew; } /** * @notice Users borrow assets from the protocol to their own address * @param borrowAmount The amount of the underlying asset to borrow * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function borrowFresh(address payable borrower, uint borrowAmount) internal returns (uint) { /* Fail if borrow not allowed */ uint allowed = comptroller.borrowAllowed(address(this), borrower, borrowAmount); if (allowed != 0) { return failOpaque(Error.COMPTROLLER_REJECTION, FailureInfo.BORROW_COMPTROLLER_REJECTION, allowed); } /* Verify market's block number equals current block number */ if (accrualBlockNumber != getBlockNumber()) { return fail(Error.MARKET_NOT_FRESH, FailureInfo.BORROW_FRESHNESS_CHECK); } /* Fail gracefully if protocol has insufficient underlying cash */ if (getCashPrior() < borrowAmount) { return fail(Error.TOKEN_INSUFFICIENT_CASH, FailureInfo.BORROW_CASH_NOT_AVAILABLE); } BorrowLocalVars memory vars; /* * We calculate the new borrower and total borrow balances, failing on overflow: * accountBorrowsNew = accountBorrows + borrowAmount * totalBorrowsNew = totalBorrows + borrowAmount */ (vars.mathErr, vars.accountBorrows) = borrowBalanceStoredInternal(borrower); if (vars.mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.BORROW_ACCUMULATED_BALANCE_CALCULATION_FAILED, uint(vars.mathErr)); } (vars.mathErr, vars.accountBorrowsNew) = addUInt(vars.accountBorrows, borrowAmount); if (vars.mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.BORROW_NEW_ACCOUNT_BORROW_BALANCE_CALCULATION_FAILED, uint(vars.mathErr)); } (vars.mathErr, vars.totalBorrowsNew) = addUInt(totalBorrows, borrowAmount); if (vars.mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.BORROW_NEW_TOTAL_BALANCE_CALCULATION_FAILED, uint(vars.mathErr)); } ///////////////////////// // EFFECTS & INTERACTIONS // (No safe failures beyond this point) /* * We invoke doTransferOut for the borrower and the borrowAmount. * Note: The cToken must handle variations between ERC-20 and ETH underlying. * On success, the cToken borrowAmount less of cash. * doTransferOut reverts if anything goes wrong, since we can't be sure if side effects occurred. */ doTransferOut(borrower, borrowAmount); /* We write the previously calculated values into storage */ accountBorrows[borrower].principal = vars.accountBorrowsNew; accountBorrows[borrower].interestIndex = borrowIndex; totalBorrows = vars.totalBorrowsNew; /* We emit a Borrow event */ emit Borrow(borrower, borrowAmount, vars.accountBorrowsNew, vars.totalBorrowsNew); /* We call the defense hook */ comptroller.borrowVerify(address(this), borrower, borrowAmount); return uint(Error.NO_ERROR); } /** * @notice Sender repays their own borrow * @param repayAmount The amount to repay * @return (uint, uint) An error code (0=success, otherwise a failure, see ErrorReporter.sol), and the actual repayment amount. */ function repayBorrowInternal(uint repayAmount) internal nonReentrant returns (uint, uint) { uint error = accrueInterest(); if (error != uint(Error.NO_ERROR)) { // accrueInterest emits logs on errors, but we still want to log the fact that an attempted borrow failed return (fail(Error(error), FailureInfo.REPAY_BORROW_ACCRUE_INTEREST_FAILED), 0); } // repayBorrowFresh emits repay-borrow-specific logs on errors, so we don't need to return repayBorrowFresh(msg.sender, msg.sender, repayAmount); } /** * @notice Sender repays a borrow belonging to borrower * @param borrower the account with the debt being payed off * @param repayAmount The amount to repay * @return (uint, uint) An error code (0=success, otherwise a failure, see ErrorReporter.sol), and the actual repayment amount. */ function repayBorrowBehalfInternal(address borrower, uint repayAmount) internal nonReentrant returns (uint, uint) { uint error = accrueInterest(); if (error != uint(Error.NO_ERROR)) { // accrueInterest emits logs on errors, but we still want to log the fact that an attempted borrow failed return (fail(Error(error), FailureInfo.REPAY_BEHALF_ACCRUE_INTEREST_FAILED), 0); } // repayBorrowFresh emits repay-borrow-specific logs on errors, so we don't need to return repayBorrowFresh(msg.sender, borrower, repayAmount); } struct RepayBorrowLocalVars { Error err; MathError mathErr; uint repayAmount; uint borrowerIndex; uint accountBorrows; uint accountBorrowsNew; uint totalBorrowsNew; uint actualRepayAmount; } /** * @notice Borrows are repaid by another user (possibly the borrower). * @param payer the account paying off the borrow * @param borrower the account with the debt being payed off * @param repayAmount the amount of undelrying tokens being returned * @return (uint, uint) An error code (0=success, otherwise a failure, see ErrorReporter.sol), and the actual repayment amount. */ function repayBorrowFresh(address payer, address borrower, uint repayAmount) internal returns (uint, uint) { /* Fail if repayBorrow not allowed */ uint allowed = comptroller.repayBorrowAllowed(address(this), payer, borrower, repayAmount); if (allowed != 0) { return (failOpaque(Error.COMPTROLLER_REJECTION, FailureInfo.REPAY_BORROW_COMPTROLLER_REJECTION, allowed), 0); } /* Verify market's block number equals current block number */ if (accrualBlockNumber != getBlockNumber()) { return (fail(Error.MARKET_NOT_FRESH, FailureInfo.REPAY_BORROW_FRESHNESS_CHECK), 0); } RepayBorrowLocalVars memory vars; /* We remember the original borrowerIndex for verification purposes */ vars.borrowerIndex = accountBorrows[borrower].interestIndex; /* We fetch the amount the borrower owes, with accumulated interest */ (vars.mathErr, vars.accountBorrows) = borrowBalanceStoredInternal(borrower); if (vars.mathErr != MathError.NO_ERROR) { return (failOpaque(Error.MATH_ERROR, FailureInfo.REPAY_BORROW_ACCUMULATED_BALANCE_CALCULATION_FAILED, uint(vars.mathErr)), 0); } /* If repayAmount == -1, repayAmount = accountBorrows */ if (repayAmount == uint(-1)) { vars.repayAmount = vars.accountBorrows; } else { vars.repayAmount = repayAmount; } ///////////////////////// // EFFECTS & INTERACTIONS // (No safe failures beyond this point) /* * We call doTransferIn for the payer and the repayAmount * Note: The cToken must handle variations between ERC-20 and ETH underlying. * On success, the cToken holds an additional repayAmount of cash. * doTransferIn reverts if anything goes wrong, since we can't be sure if side effects occurred. * it returns the amount actually transferred, in case of a fee. */ vars.actualRepayAmount = doTransferIn(payer, vars.repayAmount); /* * We calculate the new borrower and total borrow balances, failing on underflow: * accountBorrowsNew = accountBorrows - actualRepayAmount * totalBorrowsNew = totalBorrows - actualRepayAmount */ (vars.mathErr, vars.accountBorrowsNew) = subUInt(vars.accountBorrows, vars.actualRepayAmount); require(vars.mathErr == MathError.NO_ERROR, "REPAY_BORROW_NEW_ACCOUNT_BORROW_BALANCE_CALCULATION_FAILED"); (vars.mathErr, vars.totalBorrowsNew) = subUInt(totalBorrows, vars.actualRepayAmount); require(vars.mathErr == MathError.NO_ERROR, "REPAY_BORROW_NEW_TOTAL_BALANCE_CALCULATION_FAILED"); /* We write the previously calculated values into storage */ accountBorrows[borrower].principal = vars.accountBorrowsNew; accountBorrows[borrower].interestIndex = borrowIndex; totalBorrows = vars.totalBorrowsNew; /* We emit a RepayBorrow event */ emit RepayBorrow(payer, borrower, vars.actualRepayAmount, vars.accountBorrowsNew, vars.totalBorrowsNew); /* We call the defense hook */ comptroller.repayBorrowVerify(address(this), payer, borrower, vars.actualRepayAmount, vars.borrowerIndex); return (uint(Error.NO_ERROR), vars.actualRepayAmount); } /** * @notice The sender liquidates the borrowers collateral. * The collateral seized is transferred to the liquidator. * @param borrower The borrower of this cToken to be liquidated * @param cTokenCollateral The market in which to seize collateral from the borrower * @param repayAmount The amount of the underlying borrowed asset to repay * @return (uint, uint) An error code (0=success, otherwise a failure, see ErrorReporter.sol), and the actual repayment amount. */ function liquidateBorrowInternal(address borrower, uint repayAmount, CTokenInterface cTokenCollateral) internal nonReentrant returns (uint, uint) { uint error = accrueInterest(); if (error != uint(Error.NO_ERROR)) { // accrueInterest emits logs on errors, but we still want to log the fact that an attempted liquidation failed return (fail(Error(error), FailureInfo.LIQUIDATE_ACCRUE_BORROW_INTEREST_FAILED), 0); } error = cTokenCollateral.accrueInterest(); if (error != uint(Error.NO_ERROR)) { // accrueInterest emits logs on errors, but we still want to log the fact that an attempted liquidation failed return (fail(Error(error), FailureInfo.LIQUIDATE_ACCRUE_COLLATERAL_INTEREST_FAILED), 0); } // liquidateBorrowFresh emits borrow-specific logs on errors, so we don't need to return liquidateBorrowFresh(msg.sender, borrower, repayAmount, cTokenCollateral); } /** * @notice The liquidator liquidates the borrowers collateral. * The collateral seized is transferred to the liquidator. * @param borrower The borrower of this cToken to be liquidated * @param liquidator The address repaying the borrow and seizing collateral * @param cTokenCollateral The market in which to seize collateral from the borrower * @param repayAmount The amount of the underlying borrowed asset to repay * @return (uint, uint) An error code (0=success, otherwise a failure, see ErrorReporter.sol), and the actual repayment amount. */ function liquidateBorrowFresh(address liquidator, address borrower, uint repayAmount, CTokenInterface cTokenCollateral) internal returns (uint, uint) { /* Fail if liquidate not allowed */ uint allowed = comptroller.liquidateBorrowAllowed(address(this), address(cTokenCollateral), liquidator, borrower, repayAmount); if (allowed != 0) { return (failOpaque(Error.COMPTROLLER_REJECTION, FailureInfo.LIQUIDATE_COMPTROLLER_REJECTION, allowed), 0); } /* Verify market's block number equals current block number */ if (accrualBlockNumber != getBlockNumber()) { return (fail(Error.MARKET_NOT_FRESH, FailureInfo.LIQUIDATE_FRESHNESS_CHECK), 0); } /* Verify cTokenCollateral market's block number equals current block number */ if (cTokenCollateral.accrualBlockNumber() != getBlockNumber()) { return (fail(Error.MARKET_NOT_FRESH, FailureInfo.LIQUIDATE_COLLATERAL_FRESHNESS_CHECK), 0); } /* Fail if borrower = liquidator */ if (borrower == liquidator) { return (fail(Error.INVALID_ACCOUNT_PAIR, FailureInfo.LIQUIDATE_LIQUIDATOR_IS_BORROWER), 0); } /* Fail if repayAmount = 0 */ if (repayAmount == 0) { return (fail(Error.INVALID_CLOSE_AMOUNT_REQUESTED, FailureInfo.LIQUIDATE_CLOSE_AMOUNT_IS_ZERO), 0); } /* Fail if repayAmount = -1 */ if (repayAmount == uint(-1)) { return (fail(Error.INVALID_CLOSE_AMOUNT_REQUESTED, FailureInfo.LIQUIDATE_CLOSE_AMOUNT_IS_UINT_MAX), 0); } /* Fail if repayBorrow fails */ (uint repayBorrowError, uint actualRepayAmount) = repayBorrowFresh(liquidator, borrower, repayAmount); if (repayBorrowError != uint(Error.NO_ERROR)) { return (fail(Error(repayBorrowError), FailureInfo.LIQUIDATE_REPAY_BORROW_FRESH_FAILED), 0); } ///////////////////////// // EFFECTS & INTERACTIONS // (No safe failures beyond this point) /* We calculate the number of collateral tokens that will be seized */ (uint amountSeizeError, uint seizeTokens) = comptroller.liquidateCalculateSeizeTokens(address(this), address(cTokenCollateral), actualRepayAmount); require(amountSeizeError == uint(Error.NO_ERROR), "LIQUIDATE_COMPTROLLER_CALCULATE_AMOUNT_SEIZE_FAILED"); /* Revert if borrower collateral token balance < seizeTokens */ require(cTokenCollateral.balanceOf(borrower) >= seizeTokens, "LIQUIDATE_SEIZE_TOO_MUCH"); // If this is also the collateral, run seizeInternal to avoid re-entrancy, otherwise make an external call uint seizeError; if (address(cTokenCollateral) == address(this)) { seizeError = seizeInternal(address(this), liquidator, borrower, seizeTokens); } else { seizeError = cTokenCollateral.seize(liquidator, borrower, seizeTokens); } /* Revert if seize tokens fails (since we cannot be sure of side effects) */ require(seizeError == uint(Error.NO_ERROR), "token seizure failed"); /* We emit a LiquidateBorrow event */ emit LiquidateBorrow(liquidator, borrower, actualRepayAmount, address(cTokenCollateral), seizeTokens); /* We call the defense hook */ comptroller.liquidateBorrowVerify(address(this), address(cTokenCollateral), liquidator, borrower, actualRepayAmount, seizeTokens); return (uint(Error.NO_ERROR), actualRepayAmount); } /** * @notice Transfers collateral tokens (this market) to the liquidator. * @dev Will fail unless called by another cToken during the process of liquidation. * Its absolutely critical to use msg.sender as the borrowed cToken and not a parameter. * @param liquidator The account receiving seized collateral * @param borrower The account having collateral seized * @param seizeTokens The number of cTokens to seize * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function seize(address liquidator, address borrower, uint seizeTokens) external nonReentrant returns (uint) { return seizeInternal(msg.sender, liquidator, borrower, seizeTokens); } /** * @notice Transfers collateral tokens (this market) to the liquidator. * @dev Called only during an in-kind liquidation, or by liquidateBorrow during the liquidation of another CToken. * Its absolutely critical to use msg.sender as the seizer cToken and not a parameter. * @param seizerToken The contract seizing the collateral (i.e. borrowed cToken) * @param liquidator The account receiving seized collateral * @param borrower The account having collateral seized * @param seizeTokens The number of cTokens to seize * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function seizeInternal(address seizerToken, address liquidator, address borrower, uint seizeTokens) internal returns (uint) { /* Fail if seize not allowed */ uint allowed = comptroller.seizeAllowed(address(this), seizerToken, liquidator, borrower, seizeTokens); if (allowed != 0) { return failOpaque(Error.COMPTROLLER_REJECTION, FailureInfo.LIQUIDATE_SEIZE_COMPTROLLER_REJECTION, allowed); } /* Fail if borrower = liquidator */ if (borrower == liquidator) { return fail(Error.INVALID_ACCOUNT_PAIR, FailureInfo.LIQUIDATE_SEIZE_LIQUIDATOR_IS_BORROWER); } MathError mathErr; uint borrowerTokensNew; uint liquidatorTokensNew; /* * We calculate the new borrower and liquidator token balances, failing on underflow/overflow: * borrowerTokensNew = accountTokens[borrower] - seizeTokens * liquidatorTokensNew = accountTokens[liquidator] + seizeTokens */ (mathErr, borrowerTokensNew) = subUInt(accountTokens[borrower], seizeTokens); if (mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.LIQUIDATE_SEIZE_BALANCE_DECREMENT_FAILED, uint(mathErr)); } (mathErr, liquidatorTokensNew) = addUInt(accountTokens[liquidator], seizeTokens); if (mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.LIQUIDATE_SEIZE_BALANCE_INCREMENT_FAILED, uint(mathErr)); } ///////////////////////// // EFFECTS & INTERACTIONS // (No safe failures beyond this point) /* We write the previously calculated values into storage */ accountTokens[borrower] = borrowerTokensNew; accountTokens[liquidator] = liquidatorTokensNew; /* Emit a Transfer event */ emit Transfer(borrower, liquidator, seizeTokens); /* We call the defense hook */ comptroller.seizeVerify(address(this), seizerToken, liquidator, borrower, seizeTokens); return uint(Error.NO_ERROR); } /*** Admin Functions ***/ /** * @notice Begins transfer of admin rights. The newPendingAdmin must call `_acceptAdmin` to finalize the transfer. * @dev Admin function to begin change of admin. The newPendingAdmin must call `_acceptAdmin` to finalize the transfer. * @param newPendingAdmin New pending admin. * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _setPendingAdmin(address payable newPendingAdmin) external returns (uint) { // Check caller = admin if (msg.sender != admin) { return fail(Error.UNAUTHORIZED, FailureInfo.SET_PENDING_ADMIN_OWNER_CHECK); } // Save current value, if any, for inclusion in log address oldPendingAdmin = pendingAdmin; // Store pendingAdmin with value newPendingAdmin pendingAdmin = newPendingAdmin; // Emit NewPendingAdmin(oldPendingAdmin, newPendingAdmin) emit NewPendingAdmin(oldPendingAdmin, newPendingAdmin); return uint(Error.NO_ERROR); } /** * @notice Accepts transfer of admin rights. msg.sender must be pendingAdmin * @dev Admin function for pending admin to accept role and update admin * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _acceptAdmin() external returns (uint) { // Check caller is pendingAdmin and pendingAdmin ≠ address(0) if (msg.sender != pendingAdmin || msg.sender == address(0)) { return fail(Error.UNAUTHORIZED, FailureInfo.ACCEPT_ADMIN_PENDING_ADMIN_CHECK); } // Save current values for inclusion in log address oldAdmin = admin; address oldPendingAdmin = pendingAdmin; // Store admin with value pendingAdmin admin = pendingAdmin; // Clear the pending value pendingAdmin = address(0); emit NewAdmin(oldAdmin, admin); emit NewPendingAdmin(oldPendingAdmin, pendingAdmin); return uint(Error.NO_ERROR); } /** * @notice Sets a new comptroller for the market * @dev Admin function to set a new comptroller * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _setComptroller(ComptrollerInterface newComptroller) public returns (uint) { // Check caller is admin if (msg.sender != admin) { return fail(Error.UNAUTHORIZED, FailureInfo.SET_COMPTROLLER_OWNER_CHECK); } ComptrollerInterface oldComptroller = comptroller; // Ensure invoke comptroller.isComptroller() returns true require(newComptroller.isComptroller(), "marker method returned false"); // Set market's comptroller to newComptroller comptroller = newComptroller; // Emit NewComptroller(oldComptroller, newComptroller) emit NewComptroller(oldComptroller, newComptroller); return uint(Error.NO_ERROR); } /** * @notice accrues interest and sets a new reserve factor for the protocol using _setReserveFactorFresh * @dev Admin function to accrue interest and set a new reserve factor * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _setReserveFactor(uint newReserveFactorMantissa) external nonReentrant returns (uint) { uint error = accrueInterest(); if (error != uint(Error.NO_ERROR)) { // accrueInterest emits logs on errors, but on top of that we want to log the fact that an attempted reserve factor change failed. return fail(Error(error), FailureInfo.SET_RESERVE_FACTOR_ACCRUE_INTEREST_FAILED); } // _setReserveFactorFresh emits reserve-factor-specific logs on errors, so we don't need to. return _setReserveFactorFresh(newReserveFactorMantissa); } /** * @notice Sets a new reserve factor for the protocol (*requires fresh interest accrual) * @dev Admin function to set a new reserve factor * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _setReserveFactorFresh(uint newReserveFactorMantissa) internal returns (uint) { // Check caller is admin if (msg.sender != admin) { return fail(Error.UNAUTHORIZED, FailureInfo.SET_RESERVE_FACTOR_ADMIN_CHECK); } // Verify market's block number equals current block number if (accrualBlockNumber != getBlockNumber()) { return fail(Error.MARKET_NOT_FRESH, FailureInfo.SET_RESERVE_FACTOR_FRESH_CHECK); } // Check newReserveFactor ≤ maxReserveFactor if (newReserveFactorMantissa > reserveFactorMaxMantissa) { return fail(Error.BAD_INPUT, FailureInfo.SET_RESERVE_FACTOR_BOUNDS_CHECK); } uint oldReserveFactorMantissa = reserveFactorMantissa; reserveFactorMantissa = newReserveFactorMantissa; emit NewReserveFactor(oldReserveFactorMantissa, newReserveFactorMantissa); return uint(Error.NO_ERROR); } /** * @notice Accrues interest and reduces reserves by transferring from msg.sender * @param addAmount Amount of addition to reserves * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _addReservesInternal(uint addAmount) internal nonReentrant returns (uint) { uint error = accrueInterest(); if (error != uint(Error.NO_ERROR)) { // accrueInterest emits logs on errors, but on top of that we want to log the fact that an attempted reduce reserves failed. return fail(Error(error), FailureInfo.ADD_RESERVES_ACCRUE_INTEREST_FAILED); } // _addReservesFresh emits reserve-addition-specific logs on errors, so we don't need to. (error, ) = _addReservesFresh(addAmount); return error; } /** * @notice Add reserves by transferring from caller * @dev Requires fresh interest accrual * @param addAmount Amount of addition to reserves * @return (uint, uint) An error code (0=success, otherwise a failure (see ErrorReporter.sol for details)) and the actual amount added, net token fees */ function _addReservesFresh(uint addAmount) internal returns (uint, uint) { // totalReserves + actualAddAmount uint totalReservesNew; uint actualAddAmount; // We fail gracefully unless market's block number equals current block number if (accrualBlockNumber != getBlockNumber()) { return (fail(Error.MARKET_NOT_FRESH, FailureInfo.ADD_RESERVES_FRESH_CHECK), actualAddAmount); } ///////////////////////// // EFFECTS & INTERACTIONS // (No safe failures beyond this point) /* * We call doTransferIn for the caller and the addAmount * Note: The cToken must handle variations between ERC-20 and ETH underlying. * On success, the cToken holds an additional addAmount of cash. * doTransferIn reverts if anything goes wrong, since we can't be sure if side effects occurred. * it returns the amount actually transferred, in case of a fee. */ actualAddAmount = doTransferIn(msg.sender, addAmount); totalReservesNew = totalReserves + actualAddAmount; /* Revert on overflow */ require(totalReservesNew >= totalReserves, "add reserves unexpected overflow"); // Store reserves[n+1] = reserves[n] + actualAddAmount totalReserves = totalReservesNew; /* Emit NewReserves(admin, actualAddAmount, reserves[n+1]) */ emit ReservesAdded(msg.sender, actualAddAmount, totalReservesNew); /* Return (NO_ERROR, actualAddAmount) */ return (uint(Error.NO_ERROR), actualAddAmount); } /** * @notice Accrues interest and reduces reserves by transferring to admin * @param reduceAmount Amount of reduction to reserves * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _reduceReserves(uint reduceAmount) external nonReentrant returns (uint) { uint error = accrueInterest(); if (error != uint(Error.NO_ERROR)) { // accrueInterest emits logs on errors, but on top of that we want to log the fact that an attempted reduce reserves failed. return fail(Error(error), FailureInfo.REDUCE_RESERVES_ACCRUE_INTEREST_FAILED); } // _reduceReservesFresh emits reserve-reduction-specific logs on errors, so we don't need to. return _reduceReservesFresh(reduceAmount); } /** * @notice Reduces reserves by transferring to admin * @dev Requires fresh interest accrual * @param reduceAmount Amount of reduction to reserves * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _reduceReservesFresh(uint reduceAmount) internal returns (uint) { // totalReserves - reduceAmount uint totalReservesNew; // Check caller is admin if (msg.sender != admin) { return fail(Error.UNAUTHORIZED, FailureInfo.REDUCE_RESERVES_ADMIN_CHECK); } // We fail gracefully unless market's block number equals current block number if (accrualBlockNumber != getBlockNumber()) { return fail(Error.MARKET_NOT_FRESH, FailureInfo.REDUCE_RESERVES_FRESH_CHECK); } // Fail gracefully if protocol has insufficient underlying cash if (getCashPrior() < reduceAmount) { return fail(Error.TOKEN_INSUFFICIENT_CASH, FailureInfo.REDUCE_RESERVES_CASH_NOT_AVAILABLE); } // Check reduceAmount ≤ reserves[n] (totalReserves) if (reduceAmount > totalReserves) { return fail(Error.BAD_INPUT, FailureInfo.REDUCE_RESERVES_VALIDATION); } ///////////////////////// // EFFECTS & INTERACTIONS // (No safe failures beyond this point) totalReservesNew = totalReserves - reduceAmount; // We checked reduceAmount <= totalReserves above, so this should never revert. require(totalReservesNew <= totalReserves, "reduce reserves unexpected underflow"); // Store reserves[n+1] = reserves[n] - reduceAmount totalReserves = totalReservesNew; // doTransferOut reverts if anything goes wrong, since we can't be sure if side effects occurred. doTransferOut(admin, reduceAmount); emit ReservesReduced(admin, reduceAmount, totalReservesNew); return uint(Error.NO_ERROR); } /** * @notice accrues interest and updates the interest rate model using _setInterestRateModelFresh * @dev Admin function to accrue interest and update the interest rate model * @param newInterestRateModel the new interest rate model to use * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _setInterestRateModel(InterestRateModel newInterestRateModel) public returns (uint) { uint error = accrueInterest(); if (error != uint(Error.NO_ERROR)) { // accrueInterest emits logs on errors, but on top of that we want to log the fact that an attempted change of interest rate model failed return fail(Error(error), FailureInfo.SET_INTEREST_RATE_MODEL_ACCRUE_INTEREST_FAILED); } // _setInterestRateModelFresh emits interest-rate-model-update-specific logs on errors, so we don't need to. return _setInterestRateModelFresh(newInterestRateModel); } /** * @notice updates the interest rate model (*requires fresh interest accrual) * @dev Admin function to update the interest rate model * @param newInterestRateModel the new interest rate model to use * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _setInterestRateModelFresh(InterestRateModel newInterestRateModel) internal returns (uint) { // Used to store old model for use in the event that is emitted on success InterestRateModel oldInterestRateModel; // Check caller is admin if (msg.sender != admin) { return fail(Error.UNAUTHORIZED, FailureInfo.SET_INTEREST_RATE_MODEL_OWNER_CHECK); } // We fail gracefully unless market's block number equals current block number if (accrualBlockNumber != getBlockNumber()) { return fail(Error.MARKET_NOT_FRESH, FailureInfo.SET_INTEREST_RATE_MODEL_FRESH_CHECK); } // Track the market's current interest rate model oldInterestRateModel = interestRateModel; // Ensure invoke newInterestRateModel.isInterestRateModel() returns true require(newInterestRateModel.isInterestRateModel(), "marker method returned false"); // Set the interest rate model to newInterestRateModel interestRateModel = newInterestRateModel; // Emit NewMarketInterestRateModel(oldInterestRateModel, newInterestRateModel) emit NewMarketInterestRateModel(oldInterestRateModel, newInterestRateModel); return uint(Error.NO_ERROR); } /*** Safe Token ***/ /** * @notice Gets balance of this contract in terms of the underlying * @dev This excludes the value of the current message, if any * @return The quantity of underlying owned by this contract */ function getCashPrior() internal view returns (uint); /** * @dev Performs a transfer in, reverting upon failure. Returns the amount actually transferred to the protocol, in case of a fee. * This may revert due to insufficient balance or insufficient allowance. */ function doTransferIn(address from, uint amount) internal returns (uint); /** * @dev Performs a transfer out, ideally returning an explanatory error code upon failure tather than reverting. * If caller has not called checked protocol's balance, may revert due to insufficient cash held in the contract. * If caller has checked protocol's balance, and verified it is >= amount, this should not revert in normal conditions. */ function doTransferOut(address payable to, uint amount) internal; /*** Reentrancy Guard ***/ /** * @dev Prevents a contract from calling itself, directly or indirectly. */ modifier nonReentrant() { require(_notEntered, "re-entered"); _notEntered = false; _; _notEntered = true; // get a gas-refund post-Istanbul } } contract Comptroller is ComptrollerV3Storage, ComptrollerInterface, ComptrollerErrorReporter, Exponential { /// @notice Emitted when an admin supports a market event MarketListed(CToken cToken); /// @notice Emitted when an account enters a market event MarketEntered(CToken cToken, address account); /// @notice Emitted when an account exits a market event MarketExited(CToken cToken, address account); /// @notice Emitted when close factor is changed by admin event NewCloseFactor(uint oldCloseFactorMantissa, uint newCloseFactorMantissa); /// @notice Emitted when a collateral factor is changed by admin event NewCollateralFactor(CToken cToken, uint oldCollateralFactorMantissa, uint newCollateralFactorMantissa); /// @notice Emitted when liquidation incentive is changed by admin event NewLiquidationIncentive(uint oldLiquidationIncentiveMantissa, uint newLiquidationIncentiveMantissa); /// @notice Emitted when maxAssets is changed by admin event NewMaxAssets(uint oldMaxAssets, uint newMaxAssets); /// @notice Emitted when price oracle is changed event NewPriceOracle(PriceOracle oldPriceOracle, PriceOracle newPriceOracle); /// @notice Emitted when pause guardian is changed event NewPauseGuardian(address oldPauseGuardian, address newPauseGuardian); /// @notice Emitted when an action is paused globally event ActionPaused(string action, bool pauseState); /// @notice Emitted when an action is paused on a market event MarketActionPaused(CToken cToken, string action, bool pauseState); /// @notice Emitted when market comped status is changed event MarketComped(CToken cToken, bool isComped); /// @notice Emitted when COMP rate is changed event NewCompRate(uint oldCompRate, uint newCompRate); /// @notice Emitted when a new COMP speed is calculated for a market event CompSpeedUpdated(CToken indexed cToken, uint newSpeed, uint totalUtility, uint utility); /// @notice Emitted when COMP is distributed to a supplier event DistributedSupplierComp(CToken indexed cToken, address indexed supplier, uint compDelta, uint compSupplyIndex); /// @notice Emitted when COMP is distributed to a borrower event DistributedBorrowerComp(CToken indexed cToken, address indexed borrower, uint compDelta, uint compBorrowIndex); /// @notice The threshold above which the flywheel transfers COMP, in wei //uint public constant compClaimThreshold = 0.001e18; uint public constant compClaimThreshold = 1e18; /// @notice The initial COMP index for a market uint224 public constant compInitialIndex = 1e36; // closeFactorMantissa must be strictly greater than this value uint internal constant closeFactorMinMantissa = 0.05e18; // 0.05 // closeFactorMantissa must not exceed this value uint internal constant closeFactorMaxMantissa = 0.9e18; // 0.9 // No collateralFactorMantissa may exceed this value uint internal constant collateralFactorMaxMantissa = 0.9e18; // 0.9 // liquidationIncentiveMantissa must be no less than this value uint internal constant liquidationIncentiveMinMantissa = 1.0e18; // 1.0 // liquidationIncentiveMantissa must be no greater than this value uint internal constant liquidationIncentiveMaxMantissa = 1.5e18; // 1.5 constructor() public { admin = msg.sender; } /*** Assets You Are In ***/ /** * @notice Returns the assets an account has entered * @param account The address of the account to pull assets for * @return A dynamic list with the assets the account has entered */ function getAssetsIn(address account) external view returns (CToken[] memory) { CToken[] memory assetsIn = accountAssets[account]; return assetsIn; } /** * @notice Returns whether the given account is entered in the given asset * @param account The address of the account to check * @param cToken The cToken to check * @return True if the account is in the asset, otherwise false. */ function checkMembership(address account, CToken cToken) external view returns (bool) { return markets[address(cToken)].accountMembership[account]; } /** * @notice Add assets to be included in account liquidity calculation * @param cTokens The list of addresses of the cToken markets to be enabled * @return Success indicator for whether each corresponding market was entered */ function enterMarkets(address[] memory cTokens) public returns (uint[] memory) { uint len = cTokens.length; uint[] memory results = new uint[](len); for (uint i = 0; i < len; i++) { CToken cToken = CToken(cTokens[i]); results[i] = uint(addToMarketInternal(cToken, msg.sender)); } return results; } /** * @notice Add the market to the borrower's "assets in" for liquidity calculations * @param cToken The market to enter * @param borrower The address of the account to modify * @return Success indicator for whether the market was entered */ function addToMarketInternal(CToken cToken, address borrower) internal returns (Error) { Market storage marketToJoin = markets[address(cToken)]; if (!marketToJoin.isListed) { // market is not listed, cannot join return Error.MARKET_NOT_LISTED; } if (marketToJoin.accountMembership[borrower] == true) { // already joined return Error.NO_ERROR; } if (accountAssets[borrower].length >= maxAssets) { // no space, cannot join return Error.TOO_MANY_ASSETS; } // survived the gauntlet, add to list // NOTE: we store these somewhat redundantly as a significant optimization // this avoids having to iterate through the list for the most common use cases // that is, only when we need to perform liquidity checks // and not whenever we want to check if an account is in a particular market marketToJoin.accountMembership[borrower] = true; accountAssets[borrower].push(cToken); emit MarketEntered(cToken, borrower); return Error.NO_ERROR; } /** * @notice Removes asset from sender's account liquidity calculation * @dev Sender must not have an outstanding borrow balance in the asset, * or be providing necessary collateral for an outstanding borrow. * @param cTokenAddress The address of the asset to be removed * @return Whether or not the account successfully exited the market */ function exitMarket(address cTokenAddress) external returns (uint) { CToken cToken = CToken(cTokenAddress); /* Get sender tokensHeld and amountOwed underlying from the cToken */ (uint oErr, uint tokensHeld, uint amountOwed,) = cToken.getAccountSnapshot(msg.sender); require(oErr == 0, "exitMarket: getAccountSnapshot failed"); // semi-opaque error code /* Fail if the sender has a borrow balance */ if (amountOwed != 0) { return fail(Error.NONZERO_BORROW_BALANCE, FailureInfo.EXIT_MARKET_BALANCE_OWED); } /* Fail if the sender is not permitted to redeem all of their tokens */ uint allowed = redeemAllowedInternal(cTokenAddress, msg.sender, tokensHeld); if (allowed != 0) { return failOpaque(Error.REJECTION, FailureInfo.EXIT_MARKET_REJECTION, allowed); } Market storage marketToExit = markets[address(cToken)]; /* Return true if the sender is not already ‘in’ the market */ if (!marketToExit.accountMembership[msg.sender]) { return uint(Error.NO_ERROR); } /* Set cToken account membership to false */ delete marketToExit.accountMembership[msg.sender]; /* Delete cToken from the account’s list of assets */ // load into memory for faster iteration CToken[] memory userAssetList = accountAssets[msg.sender]; uint len = userAssetList.length; uint assetIndex = len; for (uint i = 0; i < len; i++) { if (userAssetList[i] == cToken) { assetIndex = i; break; } } // We *must* have found the asset in the list or our redundant data structure is broken assert(assetIndex < len); // copy last item in list to location of item to be removed, reduce length by 1 CToken[] storage storedList = accountAssets[msg.sender]; storedList[assetIndex] = storedList[storedList.length - 1]; storedList.length--; emit MarketExited(cToken, msg.sender); return uint(Error.NO_ERROR); } /*** Policy Hooks ***/ /** * @notice Checks if the account should be allowed to mint tokens in the given market * @param cToken The market to verify the mint against * @param minter The account which would get the minted tokens * @param mintAmount The amount of underlying being supplied to the market in exchange for tokens * @return 0 if the mint is allowed, otherwise a semi-opaque error code (See ErrorReporter.sol) */ function mintAllowed(address cToken, address minter, uint mintAmount) external returns (uint) { // Pausing is a very serious situation - we revert to sound the alarms require(!mintGuardianPaused[cToken], "mint is paused"); // Shh - currently unused minter; mintAmount; if (!markets[cToken].isListed) { return uint(Error.MARKET_NOT_LISTED); } // Keep the flywheel moving updateCompSupplyIndex(cToken); distributeSupplierComp(cToken, minter, false); return uint(Error.NO_ERROR); } /** * @notice Validates mint and reverts on rejection. May emit logs. * @param cToken Asset being minted * @param minter The address minting the tokens * @param actualMintAmount The amount of the underlying asset being minted * @param mintTokens The number of tokens being minted */ function mintVerify(address cToken, address minter, uint actualMintAmount, uint mintTokens) external { // Shh - currently unused cToken; minter; actualMintAmount; mintTokens; // Shh - we don't ever want this hook to be marked pure if (false) { maxAssets = maxAssets; } } /** * @notice Checks if the account should be allowed to redeem tokens in the given market * @param cToken The market to verify the redeem against * @param redeemer The account which would redeem the tokens * @param redeemTokens The number of cTokens to exchange for the underlying asset in the market * @return 0 if the redeem is allowed, otherwise a semi-opaque error code (See ErrorReporter.sol) */ function redeemAllowed(address cToken, address redeemer, uint redeemTokens) external returns (uint) { uint allowed = redeemAllowedInternal(cToken, redeemer, redeemTokens); if (allowed != uint(Error.NO_ERROR)) { return allowed; } // Keep the flywheel moving updateCompSupplyIndex(cToken); distributeSupplierComp(cToken, redeemer, false); return uint(Error.NO_ERROR); } function redeemAllowedInternal(address cToken, address redeemer, uint redeemTokens) internal view returns (uint) { if (!markets[cToken].isListed) { return uint(Error.MARKET_NOT_LISTED); } /* If the redeemer is not 'in' the market, then we can bypass the liquidity check */ if (!markets[cToken].accountMembership[redeemer]) { return uint(Error.NO_ERROR); } /* Otherwise, perform a hypothetical liquidity check to guard against shortfall */ (Error err, , uint shortfall) = getHypotheticalAccountLiquidityInternal(redeemer, CToken(cToken), redeemTokens, 0); if (err != Error.NO_ERROR) { return uint(err); } if (shortfall > 0) { return uint(Error.INSUFFICIENT_LIQUIDITY); } return uint(Error.NO_ERROR); } /** * @notice Validates redeem and reverts on rejection. May emit logs. * @param cToken Asset being redeemed * @param redeemer The address redeeming the tokens * @param redeemAmount The amount of the underlying asset being redeemed * @param redeemTokens The number of tokens being redeemed */ function redeemVerify(address cToken, address redeemer, uint redeemAmount, uint redeemTokens) external { // Shh - currently unused cToken; redeemer; // Require tokens is zero or amount is also zero if (redeemTokens == 0 && redeemAmount > 0) { revert("redeemTokens zero"); } } /** * @notice Checks if the account should be allowed to borrow the underlying asset of the given market * @param cToken The market to verify the borrow against * @param borrower The account which would borrow the asset * @param borrowAmount The amount of underlying the account would borrow * @return 0 if the borrow is allowed, otherwise a semi-opaque error code (See ErrorReporter.sol) */ function borrowAllowed(address cToken, address borrower, uint borrowAmount) external returns (uint) { // Pausing is a very serious situation - we revert to sound the alarms require(!borrowGuardianPaused[cToken], "borrow is paused"); if (!markets[cToken].isListed) { return uint(Error.MARKET_NOT_LISTED); } if (!markets[cToken].accountMembership[borrower]) { // only cTokens may call borrowAllowed if borrower not in market require(msg.sender == cToken, "sender must be cToken"); // attempt to add borrower to the market Error err = addToMarketInternal(CToken(msg.sender), borrower); if (err != Error.NO_ERROR) { return uint(err); } // it should be impossible to break the important invariant assert(markets[cToken].accountMembership[borrower]); } if (oracle.getUnderlyingPrice(CToken(cToken)) == 0) { return uint(Error.PRICE_ERROR); } (Error err, , uint shortfall) = getHypotheticalAccountLiquidityInternal(borrower, CToken(cToken), 0, borrowAmount); if (err != Error.NO_ERROR) { return uint(err); } if (shortfall > 0) { return uint(Error.INSUFFICIENT_LIQUIDITY); } // Keep the flywheel moving Exp memory borrowIndex = Exp({mantissa : CToken(cToken).borrowIndex()}); updateCompBorrowIndex(cToken, borrowIndex); distributeBorrowerComp(cToken, borrower, borrowIndex, false); return uint(Error.NO_ERROR); } /** * @notice Validates borrow and reverts on rejection. May emit logs. * @param cToken Asset whose underlying is being borrowed * @param borrower The address borrowing the underlying * @param borrowAmount The amount of the underlying asset requested to borrow */ function borrowVerify(address cToken, address borrower, uint borrowAmount) external { // Shh - currently unused cToken; borrower; borrowAmount; // Shh - we don't ever want this hook to be marked pure if (false) { maxAssets = maxAssets; } } /** * @notice Checks if the account should be allowed to repay a borrow in the given market * @param cToken The market to verify the repay against * @param payer The account which would repay the asset * @param borrower The account which would borrowed the asset * @param repayAmount The amount of the underlying asset the account would repay * @return 0 if the repay is allowed, otherwise a semi-opaque error code (See ErrorReporter.sol) */ function repayBorrowAllowed( address cToken, address payer, address borrower, uint repayAmount) external returns (uint) { // Shh - currently unused payer; borrower; repayAmount; if (!markets[cToken].isListed) { return uint(Error.MARKET_NOT_LISTED); } // Keep the flywheel moving Exp memory borrowIndex = Exp({mantissa : CToken(cToken).borrowIndex()}); updateCompBorrowIndex(cToken, borrowIndex); distributeBorrowerComp(cToken, borrower, borrowIndex, false); return uint(Error.NO_ERROR); } /** * @notice Validates repayBorrow and reverts on rejection. May emit logs. * @param cToken Asset being repaid * @param payer The address repaying the borrow * @param borrower The address of the borrower * @param actualRepayAmount The amount of underlying being repaid */ function repayBorrowVerify( address cToken, address payer, address borrower, uint actualRepayAmount, uint borrowerIndex) external { // Shh - currently unused cToken; payer; borrower; actualRepayAmount; borrowerIndex; // Shh - we don't ever want this hook to be marked pure if (false) { maxAssets = maxAssets; } } /** * @notice Checks if the liquidation should be allowed to occur * @param cTokenBorrowed Asset which was borrowed by the borrower * @param cTokenCollateral Asset which was used as collateral and will be seized * @param liquidator The address repaying the borrow and seizing the collateral * @param borrower The address of the borrower * @param repayAmount The amount of underlying being repaid */ function liquidateBorrowAllowed( address cTokenBorrowed, address cTokenCollateral, address liquidator, address borrower, uint repayAmount) external returns (uint) { // Shh - currently unused liquidator; if (!markets[cTokenBorrowed].isListed || !markets[cTokenCollateral].isListed) { return uint(Error.MARKET_NOT_LISTED); } /* The borrower must have shortfall in order to be liquidatable */ (Error err, , uint shortfall) = getAccountLiquidityInternal(borrower); if (err != Error.NO_ERROR) { return uint(err); } if (shortfall == 0) { return uint(Error.INSUFFICIENT_SHORTFALL); } /* The liquidator may not repay more than what is allowed by the closeFactor */ uint borrowBalance = CToken(cTokenBorrowed).borrowBalanceStored(borrower); (MathError mathErr, uint maxClose) = mulScalarTruncate(Exp({mantissa : closeFactorMantissa}), borrowBalance); if (mathErr != MathError.NO_ERROR) { return uint(Error.MATH_ERROR); } if (repayAmount > maxClose) { return uint(Error.TOO_MUCH_REPAY); } return uint(Error.NO_ERROR); } /** * @notice Validates liquidateBorrow and reverts on rejection. May emit logs. * @param cTokenBorrowed Asset which was borrowed by the borrower * @param cTokenCollateral Asset which was used as collateral and will be seized * @param liquidator The address repaying the borrow and seizing the collateral * @param borrower The address of the borrower * @param actualRepayAmount The amount of underlying being repaid */ function liquidateBorrowVerify( address cTokenBorrowed, address cTokenCollateral, address liquidator, address borrower, uint actualRepayAmount, uint seizeTokens) external { // Shh - currently unused cTokenBorrowed; cTokenCollateral; liquidator; borrower; actualRepayAmount; seizeTokens; // Shh - we don't ever want this hook to be marked pure if (false) { maxAssets = maxAssets; } } /** * @notice Checks if the seizing of assets should be allowed to occur * @param cTokenCollateral Asset which was used as collateral and will be seized * @param cTokenBorrowed Asset which was borrowed by the borrower * @param liquidator The address repaying the borrow and seizing the collateral * @param borrower The address of the borrower * @param seizeTokens The number of collateral tokens to seize */ function seizeAllowed( address cTokenCollateral, address cTokenBorrowed, address liquidator, address borrower, uint seizeTokens) external returns (uint) { // Pausing is a very serious situation - we revert to sound the alarms require(!seizeGuardianPaused, "seize is paused"); // Shh - currently unused seizeTokens; if (!markets[cTokenCollateral].isListed || !markets[cTokenBorrowed].isListed) { return uint(Error.MARKET_NOT_LISTED); } if (CToken(cTokenCollateral).comptroller() != CToken(cTokenBorrowed).comptroller()) { return uint(Error.COMPTROLLER_MISMATCH); } // Keep the flywheel moving updateCompSupplyIndex(cTokenCollateral); distributeSupplierComp(cTokenCollateral, borrower, false); distributeSupplierComp(cTokenCollateral, liquidator, false); return uint(Error.NO_ERROR); } /** * @notice Validates seize and reverts on rejection. May emit logs. * @param cTokenCollateral Asset which was used as collateral and will be seized * @param cTokenBorrowed Asset which was borrowed by the borrower * @param liquidator The address repaying the borrow and seizing the collateral * @param borrower The address of the borrower * @param seizeTokens The number of collateral tokens to seize */ function seizeVerify( address cTokenCollateral, address cTokenBorrowed, address liquidator, address borrower, uint seizeTokens) external { // Shh - currently unused cTokenCollateral; cTokenBorrowed; liquidator; borrower; seizeTokens; // Shh - we don't ever want this hook to be marked pure if (false) { maxAssets = maxAssets; } } /** * @notice Checks if the account should be allowed to transfer tokens in the given market * @param cToken The market to verify the transfer against * @param src The account which sources the tokens * @param dst The account which receives the tokens * @param transferTokens The number of cTokens to transfer * @return 0 if the transfer is allowed, otherwise a semi-opaque error code (See ErrorReporter.sol) */ function transferAllowed(address cToken, address src, address dst, uint transferTokens) external returns (uint) { // Pausing is a very serious situation - we revert to sound the alarms require(!transferGuardianPaused, "transfer is paused"); // Currently the only consideration is whether or not // the src is allowed to redeem this many tokens uint allowed = redeemAllowedInternal(cToken, src, transferTokens); if (allowed != uint(Error.NO_ERROR)) { return allowed; } // Keep the flywheel moving updateCompSupplyIndex(cToken); distributeSupplierComp(cToken, src, false); distributeSupplierComp(cToken, dst, false); return uint(Error.NO_ERROR); } /** * @notice Validates transfer and reverts on rejection. May emit logs. * @param cToken Asset being transferred * @param src The account which sources the tokens * @param dst The account which receives the tokens * @param transferTokens The number of cTokens to transfer */ function transferVerify(address cToken, address src, address dst, uint transferTokens) external { // Shh - currently unused cToken; src; dst; transferTokens; // Shh - we don't ever want this hook to be marked pure if (false) { maxAssets = maxAssets; } } /*** Liquidity/Liquidation Calculations ***/ /** * @dev Local vars for avoiding stack-depth limits in calculating account liquidity. * Note that `cTokenBalance` is the number of cTokens the account owns in the market, * whereas `borrowBalance` is the amount of underlying that the account has borrowed. */ struct AccountLiquidityLocalVars { uint sumCollateral; uint sumBorrowPlusEffects; uint cTokenBalance; uint borrowBalance; uint exchangeRateMantissa; uint oraclePriceMantissa; Exp collateralFactor; Exp exchangeRate; Exp oraclePrice; Exp tokensToDenom; } /** * @notice Determine the current account liquidity wrt collateral requirements * @return (possible error code (semi-opaque), account liquidity in excess of collateral requirements, * account shortfall below collateral requirements) */ function getAccountLiquidity(address account) public view returns (uint, uint, uint) { (Error err, uint liquidity, uint shortfall) = getHypotheticalAccountLiquidityInternal(account, CToken(0), 0, 0); return (uint(err), liquidity, shortfall); } /** * @notice Determine the current account liquidity wrt collateral requirements * @return (possible error code, account liquidity in excess of collateral requirements, * account shortfall below collateral requirements) */ function getAccountLiquidityInternal(address account) internal view returns (Error, uint, uint) { return getHypotheticalAccountLiquidityInternal(account, CToken(0), 0, 0); } /** * @notice Determine what the account liquidity would be if the given amounts were redeemed/borrowed * @param cTokenModify The market to hypothetically redeem/borrow in * @param account The account to determine liquidity for * @param redeemTokens The number of tokens to hypothetically redeem * @param borrowAmount The amount of underlying to hypothetically borrow * @return (possible error code (semi-opaque), hypothetical account liquidity in excess of collateral requirements, * hypothetical account shortfall below collateral requirements) */ function getHypotheticalAccountLiquidity( address account, address cTokenModify, uint redeemTokens, uint borrowAmount) public view returns (uint, uint, uint) { (Error err, uint liquidity, uint shortfall) = getHypotheticalAccountLiquidityInternal(account, CToken(cTokenModify), redeemTokens, borrowAmount); return (uint(err), liquidity, shortfall); } /** * @notice Determine what the account liquidity would be if the given amounts were redeemed/borrowed * @param cTokenModify The market to hypothetically redeem/borrow in * @param account The account to determine liquidity for * @param redeemTokens The number of tokens to hypothetically redeem * @param borrowAmount The amount of underlying to hypothetically borrow * @dev Note that we calculate the exchangeRateStored for each collateral cToken using stored data, * without calculating accumulated interest. * @return (possible error code, hypothetical account liquidity in excess of collateral requirements, * hypothetical account shortfall below collateral requirements) */ function getHypotheticalAccountLiquidityInternal( address account, CToken cTokenModify, uint redeemTokens, uint borrowAmount) internal view returns (Error, uint, uint) { AccountLiquidityLocalVars memory vars; // Holds all our calculation results uint oErr; MathError mErr; // For each asset the account is in CToken[] memory assets = accountAssets[account]; for (uint i = 0; i < assets.length; i++) { CToken asset = assets[i]; // Read the balances and exchange rate from the cToken (oErr, vars.cTokenBalance, vars.borrowBalance, vars.exchangeRateMantissa) = asset.getAccountSnapshot(account); if (oErr != 0) {// semi-opaque error code, we assume NO_ERROR == 0 is invariant between upgrades return (Error.SNAPSHOT_ERROR, 0, 0); } vars.collateralFactor = Exp({mantissa : markets[address(asset)].collateralFactorMantissa}); vars.exchangeRate = Exp({mantissa : vars.exchangeRateMantissa}); // Get the normalized price of the asset vars.oraclePriceMantissa = oracle.getUnderlyingPrice(asset); if (vars.oraclePriceMantissa == 0) { return (Error.PRICE_ERROR, 0, 0); } vars.oraclePrice = Exp({mantissa : vars.oraclePriceMantissa}); // Pre-compute a conversion factor from tokens -> ether (normalized price value) (mErr, vars.tokensToDenom) = mulExp3(vars.collateralFactor, vars.exchangeRate, vars.oraclePrice); if (mErr != MathError.NO_ERROR) { return (Error.MATH_ERROR, 0, 0); } // sumCollateral += tokensToDenom * cTokenBalance (mErr, vars.sumCollateral) = mulScalarTruncateAddUInt(vars.tokensToDenom, vars.cTokenBalance, vars.sumCollateral); if (mErr != MathError.NO_ERROR) { return (Error.MATH_ERROR, 0, 0); } // sumBorrowPlusEffects += oraclePrice * borrowBalance (mErr, vars.sumBorrowPlusEffects) = mulScalarTruncateAddUInt(vars.oraclePrice, vars.borrowBalance, vars.sumBorrowPlusEffects); if (mErr != MathError.NO_ERROR) { return (Error.MATH_ERROR, 0, 0); } // Calculate effects of interacting with cTokenModify if (asset == cTokenModify) { // redeem effect // sumBorrowPlusEffects += tokensToDenom * redeemTokens (mErr, vars.sumBorrowPlusEffects) = mulScalarTruncateAddUInt(vars.tokensToDenom, redeemTokens, vars.sumBorrowPlusEffects); if (mErr != MathError.NO_ERROR) { return (Error.MATH_ERROR, 0, 0); } // borrow effect // sumBorrowPlusEffects += oraclePrice * borrowAmount (mErr, vars.sumBorrowPlusEffects) = mulScalarTruncateAddUInt(vars.oraclePrice, borrowAmount, vars.sumBorrowPlusEffects); if (mErr != MathError.NO_ERROR) { return (Error.MATH_ERROR, 0, 0); } } } // These are safe, as the underflow condition is checked first if (vars.sumCollateral > vars.sumBorrowPlusEffects) { return (Error.NO_ERROR, vars.sumCollateral - vars.sumBorrowPlusEffects, 0); } else { return (Error.NO_ERROR, 0, vars.sumBorrowPlusEffects - vars.sumCollateral); } } /** * @notice Calculate number of tokens of collateral asset to seize given an underlying amount * @dev Used in liquidation (called in cToken.liquidateBorrowFresh) * @param cTokenBorrowed The address of the borrowed cToken * @param cTokenCollateral The address of the collateral cToken * @param actualRepayAmount The amount of cTokenBorrowed underlying to convert into cTokenCollateral tokens * @return (errorCode, number of cTokenCollateral tokens to be seized in a liquidation) */ function liquidateCalculateSeizeTokens(address cTokenBorrowed, address cTokenCollateral, uint actualRepayAmount) external view returns (uint, uint) { /* Read oracle prices for borrowed and collateral markets */ uint priceBorrowedMantissa = oracle.getUnderlyingPrice(CToken(cTokenBorrowed)); uint priceCollateralMantissa = oracle.getUnderlyingPrice(CToken(cTokenCollateral)); if (priceBorrowedMantissa == 0 || priceCollateralMantissa == 0) { return (uint(Error.PRICE_ERROR), 0); } /* * Get the exchange rate and calculate the number of collateral tokens to seize: * seizeAmount = actualRepayAmount * liquidationIncentive * priceBorrowed / priceCollateral * seizeTokens = seizeAmount / exchangeRate * = actualRepayAmount * (liquidationIncentive * priceBorrowed) / (priceCollateral * exchangeRate) */ uint exchangeRateMantissa = CToken(cTokenCollateral).exchangeRateStored(); // Note: reverts on error uint seizeTokens; Exp memory numerator; Exp memory denominator; Exp memory ratio; MathError mathErr; (mathErr, numerator) = mulExp(liquidationIncentiveMantissa, priceBorrowedMantissa); if (mathErr != MathError.NO_ERROR) { return (uint(Error.MATH_ERROR), 0); } (mathErr, denominator) = mulExp(priceCollateralMantissa, exchangeRateMantissa); if (mathErr != MathError.NO_ERROR) { return (uint(Error.MATH_ERROR), 0); } (mathErr, ratio) = divExp(numerator, denominator); if (mathErr != MathError.NO_ERROR) { return (uint(Error.MATH_ERROR), 0); } (mathErr, seizeTokens) = mulScalarTruncate(ratio, actualRepayAmount); if (mathErr != MathError.NO_ERROR) { return (uint(Error.MATH_ERROR), 0); } return (uint(Error.NO_ERROR), seizeTokens); } /*** Admin Functions ***/ /** * @notice Sets a new price oracle for the comptroller * @dev Admin function to set a new price oracle * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _setPriceOracle(PriceOracle newOracle) public returns (uint) { // Check caller is admin if (msg.sender != admin) { return fail(Error.UNAUTHORIZED, FailureInfo.SET_PRICE_ORACLE_OWNER_CHECK); } // Track the old oracle for the comptroller PriceOracle oldOracle = oracle; // Set comptroller's oracle to newOracle oracle = newOracle; // Emit NewPriceOracle(oldOracle, newOracle) emit NewPriceOracle(oldOracle, newOracle); return uint(Error.NO_ERROR); } /** * @notice Sets the closeFactor used when liquidating borrows * @dev Admin function to set closeFactor * @param newCloseFactorMantissa New close factor, scaled by 1e18 * @return uint 0=success, otherwise a failure. (See ErrorReporter for details) */ function _setCloseFactor(uint newCloseFactorMantissa) external returns (uint) { // Check caller is admin if (msg.sender != admin) { return fail(Error.UNAUTHORIZED, FailureInfo.SET_CLOSE_FACTOR_OWNER_CHECK); } Exp memory newCloseFactorExp = Exp({mantissa : newCloseFactorMantissa}); Exp memory lowLimit = Exp({mantissa : closeFactorMinMantissa}); if (lessThanOrEqualExp(newCloseFactorExp, lowLimit)) { return fail(Error.INVALID_CLOSE_FACTOR, FailureInfo.SET_CLOSE_FACTOR_VALIDATION); } Exp memory highLimit = Exp({mantissa : closeFactorMaxMantissa}); if (lessThanExp(highLimit, newCloseFactorExp)) { return fail(Error.INVALID_CLOSE_FACTOR, FailureInfo.SET_CLOSE_FACTOR_VALIDATION); } uint oldCloseFactorMantissa = closeFactorMantissa; closeFactorMantissa = newCloseFactorMantissa; emit NewCloseFactor(oldCloseFactorMantissa, closeFactorMantissa); return uint(Error.NO_ERROR); } /** * @notice Sets the collateralFactor for a market * @dev Admin function to set per-market collateralFactor * @param cToken The market to set the factor on * @param newCollateralFactorMantissa The new collateral factor, scaled by 1e18 * @return uint 0=success, otherwise a failure. (See ErrorReporter for details) */ function _setCollateralFactor(CToken cToken, uint newCollateralFactorMantissa) external returns (uint) { // Check caller is admin if (msg.sender != admin) { return fail(Error.UNAUTHORIZED, FailureInfo.SET_COLLATERAL_FACTOR_OWNER_CHECK); } // Verify market is listed Market storage market = markets[address(cToken)]; if (!market.isListed) { return fail(Error.MARKET_NOT_LISTED, FailureInfo.SET_COLLATERAL_FACTOR_NO_EXISTS); } Exp memory newCollateralFactorExp = Exp({mantissa : newCollateralFactorMantissa}); // Check collateral factor <= 0.9 Exp memory highLimit = Exp({mantissa : collateralFactorMaxMantissa}); if (lessThanExp(highLimit, newCollateralFactorExp)) { return fail(Error.INVALID_COLLATERAL_FACTOR, FailureInfo.SET_COLLATERAL_FACTOR_VALIDATION); } // If collateral factor != 0, fail if price == 0 if (newCollateralFactorMantissa != 0 && oracle.getUnderlyingPrice(cToken) == 0) { return fail(Error.PRICE_ERROR, FailureInfo.SET_COLLATERAL_FACTOR_WITHOUT_PRICE); } // Set market's collateral factor to new collateral factor, remember old value uint oldCollateralFactorMantissa = market.collateralFactorMantissa; market.collateralFactorMantissa = newCollateralFactorMantissa; // Emit event with asset, old collateral factor, and new collateral factor emit NewCollateralFactor(cToken, oldCollateralFactorMantissa, newCollateralFactorMantissa); return uint(Error.NO_ERROR); } /** * @notice Sets maxAssets which controls how many markets can be entered * @dev Admin function to set maxAssets * @param newMaxAssets New max assets * @return uint 0=success, otherwise a failure. (See ErrorReporter for details) */ function _setMaxAssets(uint newMaxAssets) external returns (uint) { // Check caller is admin if (msg.sender != admin) { return fail(Error.UNAUTHORIZED, FailureInfo.SET_MAX_ASSETS_OWNER_CHECK); } uint oldMaxAssets = maxAssets; maxAssets = newMaxAssets; emit NewMaxAssets(oldMaxAssets, newMaxAssets); return uint(Error.NO_ERROR); } /** * @notice Sets liquidationIncentive * @dev Admin function to set liquidationIncentive * @param newLiquidationIncentiveMantissa New liquidationIncentive scaled by 1e18 * @return uint 0=success, otherwise a failure. (See ErrorReporter for details) */ function _setLiquidationIncentive(uint newLiquidationIncentiveMantissa) external returns (uint) { // Check caller is admin if (msg.sender != admin) { return fail(Error.UNAUTHORIZED, FailureInfo.SET_LIQUIDATION_INCENTIVE_OWNER_CHECK); } // Check de-scaled min <= newLiquidationIncentive <= max Exp memory newLiquidationIncentive = Exp({mantissa : newLiquidationIncentiveMantissa}); Exp memory minLiquidationIncentive = Exp({mantissa : liquidationIncentiveMinMantissa}); if (lessThanExp(newLiquidationIncentive, minLiquidationIncentive)) { return fail(Error.INVALID_LIQUIDATION_INCENTIVE, FailureInfo.SET_LIQUIDATION_INCENTIVE_VALIDATION); } Exp memory maxLiquidationIncentive = Exp({mantissa : liquidationIncentiveMaxMantissa}); if (lessThanExp(maxLiquidationIncentive, newLiquidationIncentive)) { return fail(Error.INVALID_LIQUIDATION_INCENTIVE, FailureInfo.SET_LIQUIDATION_INCENTIVE_VALIDATION); } // Save current value for use in log uint oldLiquidationIncentiveMantissa = liquidationIncentiveMantissa; // Set liquidation incentive to new incentive liquidationIncentiveMantissa = newLiquidationIncentiveMantissa; // Emit event with old incentive, new incentive emit NewLiquidationIncentive(oldLiquidationIncentiveMantissa, newLiquidationIncentiveMantissa); return uint(Error.NO_ERROR); } /** * @notice Add the market to the markets mapping and set it as listed * @dev Admin function to set isListed and add support for the market * @param cToken The address of the market (token) to list * @return uint 0=success, otherwise a failure. (See enum Error for details) */ function _supportMarket(CToken cToken) external returns (uint) { if (msg.sender != admin) { return fail(Error.UNAUTHORIZED, FailureInfo.SUPPORT_MARKET_OWNER_CHECK); } if (markets[address(cToken)].isListed) { return fail(Error.MARKET_ALREADY_LISTED, FailureInfo.SUPPORT_MARKET_EXISTS); } cToken.isCToken(); // Sanity check to make sure its really a CToken markets[address(cToken)] = Market({isListed : true, isComped : true, collateralFactorMantissa : 0}); _addMarketInternal(address(cToken)); borrowGuardianPaused[address(cToken)] = true; //stage 1, not allow borrow emit MarketListed(cToken); return uint(Error.NO_ERROR); } function _addMarketInternal(address cToken) internal { for (uint i = 0; i < allMarkets.length; i ++) { require(allMarkets[i] != CToken(cToken), "market already added"); } allMarkets.push(CToken(cToken)); } /** * @notice Admin function to change the Pause Guardian * @param newPauseGuardian The address of the new Pause Guardian * @return uint 0=success, otherwise a failure. (See enum Error for details) */ function _setPauseGuardian(address newPauseGuardian) public returns (uint) { if (msg.sender != admin) { return fail(Error.UNAUTHORIZED, FailureInfo.SET_PAUSE_GUARDIAN_OWNER_CHECK); } // Save current value for inclusion in log address oldPauseGuardian = pauseGuardian; // Store pauseGuardian with value newPauseGuardian pauseGuardian = newPauseGuardian; // Emit NewPauseGuardian(OldPauseGuardian, NewPauseGuardian) emit NewPauseGuardian(oldPauseGuardian, pauseGuardian); return uint(Error.NO_ERROR); } function _setMintPaused(CToken cToken, bool state) public returns (bool) { require(markets[address(cToken)].isListed, "cannot pause a market that is not listed"); require(msg.sender == pauseGuardian || msg.sender == admin, "only pause guardian and admin can pause"); require(msg.sender == admin || state == true, "only admin can unpause"); mintGuardianPaused[address(cToken)] = state; emit MarketActionPaused(cToken, "Mint", state); return state; } function _setBorrowPaused(CToken cToken, bool state) public returns (bool) { require(markets[address(cToken)].isListed, "cannot pause a market that is not listed"); require(msg.sender == pauseGuardian || msg.sender == admin, "only pause guardian and admin can pause"); require(msg.sender == admin || state == true, "only admin can unpause"); borrowGuardianPaused[address(cToken)] = state; emit MarketActionPaused(cToken, "Borrow", state); return state; } function _setTransferPaused(bool state) public returns (bool) { require(msg.sender == pauseGuardian || msg.sender == admin, "only pause guardian and admin can pause"); require(msg.sender == admin || state == true, "only admin can unpause"); transferGuardianPaused = state; emit ActionPaused("Transfer", state); return state; } function _setSeizePaused(bool state) public returns (bool) { require(msg.sender == pauseGuardian || msg.sender == admin, "only pause guardian and admin can pause"); require(msg.sender == admin || state == true, "only admin can unpause"); seizeGuardianPaused = state; emit ActionPaused("Seize", state); return state; } function _become(Unitroller unitroller) public { require(msg.sender == unitroller.admin(), "only unitroller admin can change brains"); require(unitroller._acceptImplementation() == 0, "change not authorized"); } /** * @notice Checks caller is admin, or this contract is becoming the new implementation */ function adminOrInitializing() internal view returns (bool) { return msg.sender == admin || msg.sender == comptrollerImplementation; } /*** Comp Distribution ***/ /** * @notice Recalculate and update COMP speeds for all COMP markets */ function refreshCompSpeeds() public { require(msg.sender == tx.origin, "only externally owned accounts may refresh speeds"); refreshCompSpeedsInternal(); } function refreshCompSpeedsInternal() internal { CToken[] memory allMarkets_ = allMarkets; for (uint i = 0; i < allMarkets_.length; i++) { CToken cToken = allMarkets_[i]; Exp memory borrowIndex = Exp({mantissa : cToken.borrowIndex()}); updateCompSupplyIndex(address(cToken)); updateCompBorrowIndex(address(cToken), borrowIndex); } Exp memory borrowTotalUtility = Exp({mantissa : 0}); uint borrowAssetCount = 0; Exp memory borrowAverageUtility = Exp({mantissa : 0}); //calculate Borrow asset totalUtility if (miningRule == 1) {//mining by borrow for (uint i = 0; i < allMarkets_.length; i++) { CToken cToken = allMarkets_[i]; if (markets[address(cToken)].isComped && !borrowGuardianPaused[address(cToken)]) { Exp memory assetPrice = Exp({mantissa : oracle.getUnderlyingPrice(cToken)}); Exp memory utility = mul_(assetPrice, cToken.totalBorrows()); borrowTotalUtility = add_(borrowTotalUtility, utility); borrowAssetCount++; } } if (borrowAssetCount > 0) { borrowAverageUtility = div_(borrowTotalUtility, borrowAssetCount); } } Exp memory totalUtility = Exp({mantissa : 0}); Exp[] memory utilities = new Exp[](allMarkets_.length); for (uint i = 0; i < allMarkets_.length; i++) { CToken cToken = allMarkets_[i]; if (markets[address(cToken)].isComped) { Exp memory utility; uint buff = miningBuff[address(cToken)]; Exp memory price = Exp({mantissa : oracle.getUnderlyingPrice(cToken)}); if (buff == 0) buff = 1; if (miningRule == 0) {//mining by supply //supply * exchange rate = asset balance Exp memory supply = Exp({mantissa: cToken.totalSupply()}); //Exp memory exchangeRate = Exp({mantissa: cToken.exchangeRateStored()}); uint assetBalance = mul_(cToken.exchangeRateStored(), supply); // div e18 //usd price * balance = utility Exp memory realUtility = Exp({mantissa: mul_(assetBalance, price.mantissa)}); utility = mul_(realUtility, buff); //buff } else if (miningRule == 1) {//mining by borrow if (borrowGuardianPaused[address(cToken)]) { //averageUtility with in price utility = mul_(borrowAverageUtility, buff); } else { Exp memory realUtility = mul_(price, cToken.totalBorrows()); utility = mul_(realUtility, buff); } } else {//can't support revert(); } utilities[i] = utility; totalUtility = add_(totalUtility, utility); } } for (uint i = 0; i < allMarkets_.length; i++) { CToken cToken = allMarkets[i]; uint newSpeed = totalUtility.mantissa > 0 ? mul_(compRate, div_(utilities[i], totalUtility)) : 0; compSpeeds[address(cToken)] = newSpeed; emit CompSpeedUpdated(cToken, newSpeed, totalUtility.mantissa, utilities[i].mantissa); } } /** * @notice Accrue COMP to the market by updating the supply index * @param cToken The market whose supply index to update */ function updateCompSupplyIndex(address cToken) internal { CompMarketState storage supplyState = compSupplyState[cToken]; uint supplySpeed = compSpeeds[cToken]; uint blockNumber = getBlockNumber(); uint deltaBlocks = sub_(blockNumber, uint(supplyState.block)); if (deltaBlocks > 0 && supplySpeed > 0) { uint supplyTokens = CToken(cToken).totalSupply(); uint compAccrued = mul_(deltaBlocks, supplySpeed); Double memory ratio = supplyTokens > 0 ? fraction(compAccrued, supplyTokens) : Double({mantissa : 0}); Double memory index = add_(Double({mantissa : supplyState.index}), ratio); compSupplyState[cToken] = CompMarketState({ index : safe224(index.mantissa, "new index exceeds 224 bits"), block : safe32(blockNumber, "block number exceeds 32 bits") }); } else if (deltaBlocks > 0) { supplyState.block = safe32(blockNumber, "block number exceeds 32 bits"); } } /** * @notice Accrue COMP to the market by updating the borrow index * @param cToken The market whose borrow index to update */ function updateCompBorrowIndex(address cToken, Exp memory marketBorrowIndex) internal { CompMarketState storage borrowState = compBorrowState[cToken]; uint borrowSpeed = compSpeeds[cToken]; uint blockNumber = getBlockNumber(); uint deltaBlocks = sub_(blockNumber, uint(borrowState.block)); if (deltaBlocks > 0 && borrowSpeed > 0) { uint borrowAmount = div_(CToken(cToken).totalBorrows(), marketBorrowIndex); uint compAccrued = mul_(deltaBlocks, borrowSpeed); Double memory ratio = borrowAmount > 0 ? fraction(compAccrued, borrowAmount) : Double({mantissa : 0}); Double memory index = add_(Double({mantissa : borrowState.index}), ratio); compBorrowState[cToken] = CompMarketState({ index : safe224(index.mantissa, "new index exceeds 224 bits"), block : safe32(blockNumber, "block number exceeds 32 bits") }); } else if (deltaBlocks > 0) { borrowState.block = safe32(blockNumber, "block number exceeds 32 bits"); } } /** * @notice Calculate COMP accrued by a supplier and possibly transfer it to them * @param cToken The market in which the supplier is interacting * @param supplier The address of the supplier to distribute COMP to */ function distributeSupplierComp(address cToken, address supplier, bool distributeAll) internal { CompMarketState storage supplyState = compSupplyState[cToken]; Double memory supplyIndex = Double({mantissa : supplyState.index}); Double memory supplierIndex = Double({mantissa : compSupplierIndex[cToken][supplier]}); compSupplierIndex[cToken][supplier] = supplyIndex.mantissa; if (supplierIndex.mantissa == 0 && supplyIndex.mantissa > 0) { supplierIndex.mantissa = compInitialIndex; } Double memory deltaIndex = sub_(supplyIndex, supplierIndex); uint supplierTokens = CToken(cToken).balanceOf(supplier); uint supplierDelta = mul_(supplierTokens, deltaIndex); uint supplierAccrued = add_(compAccrued[supplier], supplierDelta); compAccrued[supplier] = transferComp(supplier, supplierAccrued, distributeAll ? 0 : compClaimThreshold); emit DistributedSupplierComp(CToken(cToken), supplier, supplierDelta, supplyIndex.mantissa); } /** * @notice Calculate COMP accrued by a borrower and possibly transfer it to them * @dev Borrowers will not begin to accrue until after the first interaction with the protocol. * @param cToken The market in which the borrower is interacting * @param borrower The address of the borrower to distribute COMP to */ function distributeBorrowerComp(address cToken, address borrower, Exp memory marketBorrowIndex, bool distributeAll) internal { CompMarketState storage borrowState = compBorrowState[cToken]; Double memory borrowIndex = Double({mantissa : borrowState.index}); Double memory borrowerIndex = Double({mantissa : compBorrowerIndex[cToken][borrower]}); compBorrowerIndex[cToken][borrower] = borrowIndex.mantissa; if (borrowerIndex.mantissa > 0) { Double memory deltaIndex = sub_(borrowIndex, borrowerIndex); uint borrowerAmount = div_(CToken(cToken).borrowBalanceStored(borrower), marketBorrowIndex); uint borrowerDelta = mul_(borrowerAmount, deltaIndex); uint borrowerAccrued = add_(compAccrued[borrower], borrowerDelta); compAccrued[borrower] = transferComp(borrower, borrowerAccrued, distributeAll ? 0 : compClaimThreshold); emit DistributedBorrowerComp(CToken(cToken), borrower, borrowerDelta, borrowIndex.mantissa); } } /** * @notice Transfer COMP to the user, if they are above the threshold * @dev Note: If there is not enough COMP, we do not perform the transfer all. * @param user The address of the user to transfer COMP to * @param userAccrued The amount of COMP to (possibly) transfer * @return The amount of COMP which was NOT transferred to the user */ function transferComp(address user, uint userAccrued, uint threshold) internal returns (uint) { if (userAccrued >= threshold && userAccrued > 0) { Cheese cheese = Cheese(getCheeseAddress()); uint cheeseRemaining = cheese.balanceOf(address(this)); if (userAccrued <= cheeseRemaining) { cheese.transfer(user, userAccrued); return 0; } } return userAccrued; } /** * @notice Claim all the comp accrued by holder in all markets * @param holder The address to claim COMP for */ function claimComp(address holder) public { return claimComp(holder, allMarkets); } /** * @notice Claim all the comp accrued by holder in the specified markets * @param holder The address to claim COMP for * @param cTokens The list of markets to claim COMP in */ function claimComp(address holder, CToken[] memory cTokens) public { address[] memory holders = new address[](1); holders[0] = holder; claimComp(holders, cTokens, true, true); } /** * @notice Claim all comp accrued by the holders * @param holders The addresses to claim COMP for * @param cTokens The list of markets to claim COMP in * @param borrowers Whether or not to claim COMP earned by borrowing * @param suppliers Whether or not to claim COMP earned by supplying */ function claimComp(address[] memory holders, CToken[] memory cTokens, bool borrowers, bool suppliers) public { for (uint i = 0; i < cTokens.length; i++) { CToken cToken = cTokens[i]; require(markets[address(cToken)].isListed, "market must be listed"); if (borrowers == true) { Exp memory borrowIndex = Exp({mantissa : cToken.borrowIndex()}); updateCompBorrowIndex(address(cToken), borrowIndex); for (uint j = 0; j < holders.length; j++) { distributeBorrowerComp(address(cToken), holders[j], borrowIndex, true); } } if (suppliers == true) { updateCompSupplyIndex(address(cToken)); for (uint j = 0; j < holders.length; j++) { distributeSupplierComp(address(cToken), holders[j], true); } } } } /*** Comp Distribution Admin ***/ /** * @notice Set the amount of COMP distributed per block * @param compRate_ The amount of COMP wei per block to distribute */ function _setCompRate(uint compRate_) public { require(adminOrInitializing(), "only admin can change comp rate"); uint oldRate = compRate; compRate = compRate_; emit NewCompRate(oldRate, compRate_); refreshCompSpeedsInternal(); } /** * @notice Add markets to compMarkets, allowing them to earn COMP in the flywheel * @param cTokens The addresses of the markets to add */ function _addCompMarkets(address[] memory cTokens) public { require(adminOrInitializing(), "only admin can add comp market"); for (uint i = 0; i < cTokens.length; i++) { _addCompMarketInternal(cTokens[i]); } refreshCompSpeedsInternal(); } function _addCompMarketInternal(address cToken) internal { Market storage market = markets[cToken]; require(market.isListed == true, "comp market is not listed"); require(market.isComped == false, "comp market already added"); market.isComped = true; emit MarketComped(CToken(cToken), true); if (compSupplyState[cToken].index == 0 && compSupplyState[cToken].block == 0) { compSupplyState[cToken] = CompMarketState({ index : compInitialIndex, block : safe32(getBlockNumber(), "block number exceeds 32 bits") }); } if (compBorrowState[cToken].index == 0 && compBorrowState[cToken].block == 0) { compBorrowState[cToken] = CompMarketState({ index : compInitialIndex, block : safe32(getBlockNumber(), "block number exceeds 32 bits") }); } } /** * @notice Remove a market from compMarkets, preventing it from earning COMP in the flywheel * @param cToken The address of the market to drop */ function _dropCompMarket(address cToken) public { require(msg.sender == admin, "only admin can drop comp market"); Market storage market = markets[cToken]; require(market.isComped == true, "market is not a comp market"); market.isComped = false; emit MarketComped(CToken(cToken), false); refreshCompSpeedsInternal(); } function _setMiningBuff(address cToken, uint buff) public { require(adminOrInitializing(), "only admin can change cheese rate"); miningBuff[cToken] = buff; } function _changeMiningRule() public { if (msg.sender != admin || miningRule != 0) { return; } /* require(adminOrInitializing(), "only admin can set mining rule"); require(miningRule == 0, "only change mining rule from 0 to 1"); */ miningRule = 1; } /** * @notice Return all of the markets * @dev The automatic getter may be used to access an individual market. * @return The list of market addresses */ function getAllMarkets() public view returns (CToken[] memory) { return allMarkets; } function getBlockNumber() public view returns (uint) { return block.number; } /** * @notice Return the address of the COMP token * @return The address of COMP */ function getCheeseAddress() public view returns (address) { return 0x31Ec45237800102F1c42a40dfCCF276ac5386fce; } } contract CErc20 is CToken, CErc20Interface { constructor() public { admin = msg.sender; } /** * @notice Initialize the new money market * @param underlying_ The address of the underlying asset * @param comptroller_ The address of the Comptroller * @param interestRateModel_ The address of the interest rate model * @param initialExchangeRateMantissa_ The initial exchange rate, scaled by 1e18 * @param name_ ERC-20 name of this token * @param symbol_ ERC-20 symbol of this token * @param decimals_ ERC-20 decimal precision of this token */ function initialize(address underlying_, ComptrollerInterface comptroller_, InterestRateModel interestRateModel_, uint initialExchangeRateMantissa_, string memory name_, string memory symbol_, uint8 decimals_) public { // CToken initialize does the bulk of the work super.initialize(comptroller_, interestRateModel_, initialExchangeRateMantissa_, name_, symbol_, decimals_); // Set underlying and sanity check it underlying = underlying_; EIP20Interface(underlying).totalSupply(); } /*** User Interface ***/ /** * @notice Sender supplies assets into the market and receives cTokens in exchange * @dev Accrues interest whether or not the operation succeeds, unless reverted * @param mintAmount The amount of the underlying asset to supply * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function mint(uint mintAmount) external returns (uint) { (uint err,) = mintInternal(mintAmount); return err; } /** * @notice Sender redeems cTokens in exchange for the underlying asset * @dev Accrues interest whether or not the operation succeeds, unless reverted * @param redeemTokens The number of cTokens to redeem into underlying * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function redeem(uint redeemTokens) external returns (uint) { return redeemInternal(redeemTokens); } /** * @notice Sender redeems cTokens in exchange for a specified amount of underlying asset * @dev Accrues interest whether or not the operation succeeds, unless reverted * @param redeemAmount The amount of underlying to redeem * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function redeemUnderlying(uint redeemAmount) external returns (uint) { return redeemUnderlyingInternal(redeemAmount); } /** * @notice Sender borrows assets from the protocol to their own address * @param borrowAmount The amount of the underlying asset to borrow * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function borrow(uint borrowAmount) external returns (uint) { return borrowInternal(borrowAmount); } /** * @notice Sender repays their own borrow * @param repayAmount The amount to repay * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function repayBorrow(uint repayAmount) external returns (uint) { (uint err,) = repayBorrowInternal(repayAmount); return err; } /** * @notice Sender repays a borrow belonging to borrower * @param borrower the account with the debt being payed off * @param repayAmount The amount to repay * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function repayBorrowBehalf(address borrower, uint repayAmount) external returns (uint) { (uint err,) = repayBorrowBehalfInternal(borrower, repayAmount); return err; } /** * @notice The sender liquidates the borrowers collateral. * The collateral seized is transferred to the liquidator. * @param borrower The borrower of this cToken to be liquidated * @param repayAmount The amount of the underlying borrowed asset to repay * @param cTokenCollateral The market in which to seize collateral from the borrower * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function liquidateBorrow(address borrower, uint repayAmount, CTokenInterface cTokenCollateral) external returns (uint) { (uint err,) = liquidateBorrowInternal(borrower, repayAmount, cTokenCollateral); return err; } /** * @notice The sender adds to reserves. * @param addAmount The amount fo underlying token to add as reserves * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _addReserves(uint addAmount) external returns (uint) { return _addReservesInternal(addAmount); } /*** Safe Token ***/ /** * @notice Gets balance of this contract in terms of the underlying * @dev This excludes the value of the current message, if any * @return The quantity of underlying tokens owned by this contract */ function getCashPrior() internal view returns (uint) { EIP20Interface token = EIP20Interface(underlying); return token.balanceOf(address(this)); } /** * @dev Similar to EIP20 transfer, except it handles a False result from `transferFrom` and reverts in that case. * This will revert due to insufficient balance or insufficient allowance. * This function returns the actual amount received, * which may be less than `amount` if there is a fee attached to the transfer. * * Note: This wrapper safely handles non-standard ERC-20 tokens that do not return a value. * See here: https://medium.com/coinmonks/missing-return-value-bug-at-least-130-tokens-affected-d67bf08521ca */ function doTransferIn(address from, uint amount) internal returns (uint) { EIP20NonStandardInterface token = EIP20NonStandardInterface(underlying); uint balanceBefore = EIP20Interface(underlying).balanceOf(address(this)); token.transferFrom(from, address(this), amount); bool success; assembly { switch returndatasize() case 0 { // This is a non-standard ERC-20 success := not(0) // set success to true } case 32 { // This is a compliant ERC-20 returndatacopy(0, 0, 32) success := mload(0) // Set `success = returndata` of external call } default { // This is an excessively non-compliant ERC-20, revert. revert(0, 0) } } require(success, "TOKEN_TRANSFER_IN_FAILED"); // Calculate the amount that was *actually* transferred uint balanceAfter = EIP20Interface(underlying).balanceOf(address(this)); require(balanceAfter >= balanceBefore, "TOKEN_TRANSFER_IN_OVERFLOW"); return balanceAfter - balanceBefore; // underflow already checked above, just subtract } /** * @dev Similar to EIP20 transfer, except it handles a False success from `transfer` and returns an explanatory * error code rather than reverting. If caller has not called checked protocol's balance, this may revert due to * insufficient cash held in this contract. If caller has checked protocol's balance prior to this call, and verified * it is >= amount, this should not revert in normal conditions. * * Note: This wrapper safely handles non-standard ERC-20 tokens that do not return a value. * See here: https://medium.com/coinmonks/missing-return-value-bug-at-least-130-tokens-affected-d67bf08521ca */ function doTransferOut(address payable to, uint amount) internal { EIP20NonStandardInterface token = EIP20NonStandardInterface(underlying); token.transfer(to, amount); bool success; assembly { switch returndatasize() case 0 { // This is a non-standard ERC-20 success := not(0) // set success to true } case 32 { // This is a complaint ERC-20 returndatacopy(0, 0, 32) success := mload(0) // Set `success = returndata` of external call } default { // This is an excessively non-compliant ERC-20, revert. revert(0, 0) } } require(success, "TOKEN_TRANSFER_OUT_FAILED"); } } contract CErc20Delegate is CErc20, CDelegateInterface { /** * @notice Construct an empty delegate */ constructor() public {} /** * @notice Called by the delegator on a delegate to initialize it for duty * @param data The encoded bytes data for any initialization */ function _becomeImplementation(bytes memory data) public { // Shh -- currently unused data; // Shh -- we don't ever want this hook to be marked pure if (false) { implementation = address(0); } require(msg.sender == admin, "only the admin may call _becomeImplementation"); } /** * @notice Called by the delegator on a delegate to forfeit its responsibility */ function _resignImplementation() public { // Shh -- we don't ever want this hook to be marked pure if (false) { implementation = address(0); } require(msg.sender == admin, "only the admin may call _resignImplementation"); } } contract CErc20Immutable is CErc20 { /** * @notice Construct a new money market * @param underlying_ The address of the underlying asset * @param comptroller_ The address of the Comptroller * @param interestRateModel_ The address of the interest rate model * @param initialExchangeRateMantissa_ The initial exchange rate, scaled by 1e18 * @param name_ ERC-20 name of this token * @param symbol_ ERC-20 symbol of this token * @param decimals_ ERC-20 decimal precision of this token * @param admin_ Address of the administrator of this token */ constructor(address underlying_, ComptrollerInterface comptroller_, InterestRateModel interestRateModel_, uint initialExchangeRateMantissa_, string memory name_, string memory symbol_, uint8 decimals_, address payable admin_) public { // Creator of the contract is admin during initialization admin = msg.sender; // Initialize the market initialize(underlying_, comptroller_, interestRateModel_, initialExchangeRateMantissa_, name_, symbol_, decimals_); // Set the proper admin now that initialization is done admin = admin_; } } contract CEther is CToken { /** * @notice Construct a new CEther money market * @param comptroller_ The address of the Comptroller * @param interestRateModel_ The address of the interest rate model * @param initialExchangeRateMantissa_ The initial exchange rate, scaled by 1e18 * @param name_ ERC-20 name of this token * @param symbol_ ERC-20 symbol of this token * @param decimals_ ERC-20 decimal precision of this token * @param admin_ Address of the administrator of this token */ constructor(ComptrollerInterface comptroller_, InterestRateModel interestRateModel_, uint initialExchangeRateMantissa_, string memory name_, string memory symbol_, uint8 decimals_, address payable admin_) public { // Creator of the contract is admin during initialization admin = msg.sender; initialize(comptroller_, interestRateModel_, initialExchangeRateMantissa_, name_, symbol_, decimals_); // Set the proper admin now that initialization is done admin = admin_; } /*** User Interface ***/ /** * @notice Sender supplies assets into the market and receives cTokens in exchange * @dev Reverts upon any failure */ function mint() external payable { (uint err,) = mintInternal(msg.value); requireNoError(err, "mint failed"); } /** * @notice Sender redeems cTokens in exchange for the underlying asset * @dev Accrues interest whether or not the operation succeeds, unless reverted * @param redeemTokens The number of cTokens to redeem into underlying * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function redeem(uint redeemTokens) external returns (uint) { return redeemInternal(redeemTokens); } /** * @notice Sender redeems cTokens in exchange for a specified amount of underlying asset * @dev Accrues interest whether or not the operation succeeds, unless reverted * @param redeemAmount The amount of underlying to redeem * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function redeemUnderlying(uint redeemAmount) external returns (uint) { return redeemUnderlyingInternal(redeemAmount); } /** * @notice Sender borrows assets from the protocol to their own address * @param borrowAmount The amount of the underlying asset to borrow * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function borrow(uint borrowAmount) external returns (uint) { return borrowInternal(borrowAmount); } /** * @notice Sender repays their own borrow * @dev Reverts upon any failure */ function repayBorrow() external payable { (uint err,) = repayBorrowInternal(msg.value); requireNoError(err, "repayBorrow failed"); } /** * @notice Sender repays a borrow belonging to borrower * @dev Reverts upon any failure * @param borrower the account with the debt being payed off */ function repayBorrowBehalf(address borrower) external payable { (uint err,) = repayBorrowBehalfInternal(borrower, msg.value); requireNoError(err, "repayBorrowBehalf failed"); } /** * @notice The sender liquidates the borrowers collateral. * The collateral seized is transferred to the liquidator. * @dev Reverts upon any failure * @param borrower The borrower of this cToken to be liquidated * @param cTokenCollateral The market in which to seize collateral from the borrower */ function liquidateBorrow(address borrower, CToken cTokenCollateral) external payable { (uint err,) = liquidateBorrowInternal(borrower, msg.value, cTokenCollateral); requireNoError(err, "liquidateBorrow failed"); } /** * @notice Send Ether to CEther to mint */ function () external payable { (uint err,) = mintInternal(msg.value); requireNoError(err, "mint failed"); } /*** Safe Token ***/ /** * @notice Gets balance of this contract in terms of Ether, before this message * @dev This excludes the value of the current message, if any * @return The quantity of Ether owned by this contract */ function getCashPrior() internal view returns (uint) { (MathError err, uint startingBalance) = subUInt(address(this).balance, msg.value); require(err == MathError.NO_ERROR); return startingBalance; } /** * @notice Perform the actual transfer in, which is a no-op * @param from Address sending the Ether * @param amount Amount of Ether being sent * @return The actual amount of Ether transferred */ function doTransferIn(address from, uint amount) internal returns (uint) { // Sanity checks require(msg.sender == from, "sender mismatch"); require(msg.value == amount, "value mismatch"); return amount; } function doTransferOut(address payable to, uint amount) internal { /* Send the Ether, with minimal gas and revert on failure */ to.transfer(amount); } function requireNoError(uint errCode, string memory message) internal pure { if (errCode == uint(Error.NO_ERROR)) { return; } bytes memory fullMessage = new bytes(bytes(message).length + 5); uint i; for (i = 0; i < bytes(message).length; i++) { fullMessage[i] = bytes(message)[i]; } fullMessage[i+0] = byte(uint8(32)); fullMessage[i+1] = byte(uint8(40)); fullMessage[i+2] = byte(uint8(48 + ( errCode / 10 ))); fullMessage[i+3] = byte(uint8(48 + ( errCode % 10 ))); fullMessage[i+4] = byte(uint8(41)); require(errCode == uint(Error.NO_ERROR), string(fullMessage)); } } contract CDaiDelegate is CErc20Delegate { /** * @notice DAI adapter address */ address public daiJoinAddress; /** * @notice DAI Savings Rate (DSR) pot address */ address public potAddress; /** * @notice DAI vat address */ address public vatAddress; /** * @notice Delegate interface to become the implementation * @param data The encoded arguments for becoming */ function _becomeImplementation(bytes memory data) public { require(msg.sender == admin, "only the admin may initialize the implementation"); (address daiJoinAddress_, address potAddress_) = abi.decode(data, (address, address)); return _becomeImplementation(daiJoinAddress_, potAddress_); } /** * @notice Explicit interface to become the implementation * @param daiJoinAddress_ DAI adapter address * @param potAddress_ DAI Savings Rate (DSR) pot address */ function _becomeImplementation(address daiJoinAddress_, address potAddress_) internal { // Get dai and vat and sanity check the underlying DaiJoinLike daiJoin = DaiJoinLike(daiJoinAddress_); PotLike pot = PotLike(potAddress_); GemLike dai = daiJoin.dai(); VatLike vat = daiJoin.vat(); require(address(dai) == underlying, "DAI must be the same as underlying"); // Remember the relevant addresses daiJoinAddress = daiJoinAddress_; potAddress = potAddress_; vatAddress = address(vat); // Approve moving our DAI into the vat through daiJoin dai.approve(daiJoinAddress, uint(-1)); // Approve the pot to transfer our funds within the vat vat.hope(potAddress); vat.hope(daiJoinAddress); // Accumulate DSR interest -- must do this in order to doTransferIn pot.drip(); // Transfer all cash in (doTransferIn does this regardless of amount) doTransferIn(address(this), 0); } /** * @notice Delegate interface to resign the implementation */ function _resignImplementation() public { require(msg.sender == admin, "only the admin may abandon the implementation"); // Transfer all cash out of the DSR - note that this relies on self-transfer DaiJoinLike daiJoin = DaiJoinLike(daiJoinAddress); PotLike pot = PotLike(potAddress); VatLike vat = VatLike(vatAddress); // Accumulate interest pot.drip(); // Calculate the total amount in the pot, and move it out uint pie = pot.pie(address(this)); pot.exit(pie); // Checks the actual balance of DAI in the vat after the pot exit uint bal = vat.dai(address(this)); // Remove our whole balance daiJoin.exit(address(this), bal / RAY); } /*** CToken Overrides ***/ /** * @notice Accrues DSR then applies accrued interest to total borrows and reserves * @dev This calculates interest accrued from the last checkpointed block * up to the current block and writes new checkpoint to storage. */ function accrueInterest() public returns (uint) { // Accumulate DSR interest PotLike(potAddress).drip(); // Accumulate CToken interest return super.accrueInterest(); } /*** Safe Token ***/ /** * @notice Gets balance of this contract in terms of the underlying * @dev This excludes the value of the current message, if any * @return The quantity of underlying tokens owned by this contract */ function getCashPrior() internal view returns (uint) { PotLike pot = PotLike(potAddress); uint pie = pot.pie(address(this)); return mul(pot.chi(), pie) / RAY; } /** * @notice Transfer the underlying to this contract and sweep into DSR pot * @param from Address to transfer funds from * @param amount Amount of underlying to transfer * @return The actual amount that is transferred */ function doTransferIn(address from, uint amount) internal returns (uint) { // Perform the EIP-20 transfer in EIP20Interface token = EIP20Interface(underlying); require(token.transferFrom(from, address(this), amount), "unexpected EIP-20 transfer in return"); DaiJoinLike daiJoin = DaiJoinLike(daiJoinAddress); GemLike dai = GemLike(underlying); PotLike pot = PotLike(potAddress); VatLike vat = VatLike(vatAddress); // Convert all our DAI to internal DAI in the vat daiJoin.join(address(this), dai.balanceOf(address(this))); // Checks the actual balance of DAI in the vat after the join uint bal = vat.dai(address(this)); // Calculate the percentage increase to th pot for the entire vat, and move it in // Note: We may leave a tiny bit of DAI in the vat...but we do the whole thing every time uint pie = bal / pot.chi(); pot.join(pie); return amount; } /** * @notice Transfer the underlying from this contract, after sweeping out of DSR pot * @param to Address to transfer funds to * @param amount Amount of underlying to transfer */ function doTransferOut(address payable to, uint amount) internal { DaiJoinLike daiJoin = DaiJoinLike(daiJoinAddress); PotLike pot = PotLike(potAddress); // Calculate the percentage decrease from the pot, and move that much out // Note: Use a slightly larger pie size to ensure that we get at least amount in the vat uint pie = add(mul(amount, RAY) / pot.chi(), 1); pot.exit(pie); daiJoin.exit(to, amount); } /*** Maker Internals ***/ uint256 constant RAY = 10 ** 27; function add(uint x, uint y) internal pure returns (uint z) { require((z = x + y) >= x, "add-overflow"); } function mul(uint x, uint y) internal pure returns (uint z) { require(y == 0 || (z = x * y) / y == x, "mul-overflow"); } }

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{"success": true, "error": null, "results": {"detectors": [{"check": "uninitialized-state", "impact": "High", "confidence": "High"}, {"check": "reentrancy-no-eth", "impact": "Medium", "confidence": "Medium"}, {"check": "boolean-cst", "impact": "Medium", "confidence": "Medium"}, {"check": "controlled-delegatecall", "impact": "High", "confidence": "Medium"}, {"check": "erc20-interface", "impact": "Medium", "confidence": "High"}, {"check": "incorrect-equality", "impact": "Medium", "confidence": "High"}, {"check": "uninitialized-local", "impact": "Medium", "confidence": "Medium"}, {"check": "unchecked-transfer", "impact": "High", "confidence": "Medium"}, {"check": "unused-return", "impact": "Medium", "confidence": "Medium"}, {"check": "controlled-array-length", "impact": "High", "confidence": "Medium"}]}}

0x6c19e4cc4c87adb224697a1022f262b424f44d46

pragma solidity 0.5.12; contract BColor { function getColor() external view returns (bytes32); } contract BBronze is BColor { function getColor() external view returns (bytes32) { return bytes32("BRONZE"); } } contract BConst is BBronze { uint public constant BONE = 10**18; uint public constant MIN_BOUND_TOKENS = 2; uint public constant MAX_BOUND_TOKENS = 8; uint public constant MIN_FEE = BONE / 40000; // MIN_FEE = 0.0025% uint public constant MAX_FEE = BONE / 10; // MAX_FEE = 10% uint public constant EXIT_FEE = 0; uint public constant DEFAULT_RESERVES_RATIO = BONE / 5; uint public constant MIN_WEIGHT = BONE; uint public constant MAX_WEIGHT = BONE * 50; uint public constant MAX_TOTAL_WEIGHT = BONE * 50; uint public constant MIN_BALANCE = BONE / 10**12; uint public constant INIT_POOL_SUPPLY = BONE * 100; uint public constant MIN_BPOW_BASE = 1 wei; uint public constant MAX_BPOW_BASE = (2 * BONE) - 1 wei; uint public constant BPOW_PRECISION = BONE / 10**10; uint public constant MAX_IN_RATIO = BONE / 2; uint public constant MAX_OUT_RATIO = (BONE / 3) + 1 wei; } contract BNum is BConst { function btoi(uint a) internal pure returns (uint) { return a / BONE; } function bfloor(uint a) internal pure returns (uint) { return btoi(a) * BONE; } function badd(uint a, uint b) internal pure returns (uint) { uint c = a + b; require(c >= a, "ERR_ADD_OVERFLOW"); return c; } function bsub(uint a, uint b) internal pure returns (uint) { (uint c, bool flag) = bsubSign(a, b); require(!flag, "ERR_SUB_UNDERFLOW"); return c; } function bsubSign(uint a, uint b) internal pure returns (uint, bool) { if (a >= b) { return (a - b, false); } else { return (b - a, true); } } function bmul(uint a, uint b) internal pure returns (uint) { uint c0 = a * b; require(a == 0 || c0 / a == b, "ERR_MUL_OVERFLOW"); uint c1 = c0 + (BONE / 2); require(c1 >= c0, "ERR_MUL_OVERFLOW"); uint c2 = c1 / BONE; return c2; } function bdiv(uint a, uint b) internal pure returns (uint) { require(b != 0, "ERR_DIV_ZERO"); uint c0 = a * BONE; require(a == 0 || c0 / a == BONE, "ERR_DIV_INTERNAL"); // bmul overflow uint c1 = c0 + (b / 2); require(c1 >= c0, "ERR_DIV_INTERNAL"); // badd require uint c2 = c1 / b; return c2; } // DSMath.wpow function bpowi(uint a, uint n) internal pure returns (uint) { uint z = n % 2 != 0 ? a : BONE; for (n /= 2; n != 0; n /= 2) { a = bmul(a, a); if (n % 2 != 0) { z = bmul(z, a); } } return z; } // Compute b^(e.w) by splitting it into (b^e)*(b^0.w). // Use `bpowi` for `b^e` and `bpowK` for k iterations // of approximation of b^0.w function bpow(uint base, uint exp) internal pure returns (uint) { require(base >= MIN_BPOW_BASE, "ERR_BPOW_BASE_TOO_LOW"); require(base <= MAX_BPOW_BASE, "ERR_BPOW_BASE_TOO_HIGH"); uint whole = bfloor(exp); uint remain = bsub(exp, whole); uint wholePow = bpowi(base, btoi(whole)); if (remain == 0) { return wholePow; } uint partialResult = bpowApprox(base, remain, BPOW_PRECISION); return bmul(wholePow, partialResult); } function bpowApprox(uint base, uint exp, uint precision) internal pure returns (uint) { // term 0: uint a = exp; (uint x, bool xneg) = bsubSign(base, BONE); uint term = BONE; uint sum = term; bool negative = false; // term(k) = numer / denom // = (product(a - i - 1, i=1-->k) * x^k) / (k!) // each iteration, multiply previous term by (a-(k-1)) * x / k // continue until term is less than precision for (uint i = 1; term >= precision; i++) { uint bigK = i * BONE; (uint c, bool cneg) = bsubSign(a, bsub(bigK, BONE)); term = bmul(term, bmul(c, x)); term = bdiv(term, bigK); if (term == 0) break; if (xneg) negative = !negative; if (cneg) negative = !negative; if (negative) { sum = bsub(sum, term); } else { sum = badd(sum, term); } } return sum; } } interface IERC20 { event Approval(address indexed src, address indexed dst, uint amt); event Transfer(address indexed src, address indexed dst, uint amt); function totalSupply() external view returns (uint); function balanceOf(address whom) external view returns (uint); function allowance(address src, address dst) external view returns (uint); function approve(address dst, uint amt) external returns (bool); function transfer(address dst, uint amt) external returns (bool); function transferFrom( address src, address dst, uint amt ) external returns (bool); } contract BTokenBase is BNum { mapping(address => uint) internal _balance; mapping(address => mapping(address=>uint)) internal _allowance; uint internal _totalSupply; event Approval(address indexed src, address indexed dst, uint amt); event Transfer(address indexed src, address indexed dst, uint amt); function _mint(uint amt) internal { _balance[address(this)] = badd(_balance[address(this)], amt); _totalSupply = badd(_totalSupply, amt); emit Transfer(address(0), address(this), amt); } function _burn(uint amt) internal { require(_balance[address(this)] >= amt); _balance[address(this)] = bsub(_balance[address(this)], amt); _totalSupply = bsub(_totalSupply, amt); emit Transfer(address(this), address(0), amt); } function _move(address src, address dst, uint amt) internal { require(_balance[src] >= amt); _balance[src] = bsub(_balance[src], amt); _balance[dst] = badd(_balance[dst], amt); emit Transfer(src, dst, amt); } function _push(address to, uint amt) internal { _move(address(this), to, amt); } function _pull(address from, uint amt) internal { _move(from, address(this), amt); } } contract BToken is BTokenBase, IERC20 { string private _name = "Cream Pool Token"; string private _symbol = "CRPT"; uint8 private _decimals = 18; function name() public view returns (string memory) { return _name; } function symbol() public view returns (string memory) { return _symbol; } function decimals() public view returns(uint8) { return _decimals; } function allowance(address src, address dst) external view returns (uint) { return _allowance[src][dst]; } function balanceOf(address whom) external view returns (uint) { return _balance[whom]; } function totalSupply() public view returns (uint) { return _totalSupply; } function approve(address dst, uint amt) external returns (bool) { _allowance[msg.sender][dst] = amt; emit Approval(msg.sender, dst, amt); return true; } function increaseApproval(address dst, uint amt) external returns (bool) { _allowance[msg.sender][dst] = badd(_allowance[msg.sender][dst], amt); emit Approval(msg.sender, dst, _allowance[msg.sender][dst]); return true; } function decreaseApproval(address dst, uint amt) external returns (bool) { uint oldValue = _allowance[msg.sender][dst]; if (amt > oldValue) { _allowance[msg.sender][dst] = 0; } else { _allowance[msg.sender][dst] = bsub(oldValue, amt); } emit Approval(msg.sender, dst, _allowance[msg.sender][dst]); return true; } function transfer(address dst, uint amt) external returns (bool) { _move(msg.sender, dst, amt); return true; } function transferFrom(address src, address dst, uint amt) external returns (bool) { require(msg.sender == src || amt <= _allowance[src][msg.sender]); _move(src, dst, amt); if (msg.sender != src && _allowance[src][msg.sender] != uint256(-1)) { _allowance[src][msg.sender] = bsub(_allowance[src][msg.sender], amt); emit Approval(msg.sender, dst, _allowance[src][msg.sender]); } return true; } } contract BMath is BBronze, BConst, BNum { /********************************************************************************************** // calcSpotPrice // // sP = spotPrice // // bI = tokenBalanceIn ( bI / wI ) 1 // // bO = tokenBalanceOut sP = ----------- * ---------- // // wI = tokenWeightIn ( bO / wO ) ( 1 - sF ) // // wO = tokenWeightOut // // sF = swapFee // **********************************************************************************************/ function calcSpotPrice( uint tokenBalanceIn, uint tokenWeightIn, uint tokenBalanceOut, uint tokenWeightOut, uint swapFee ) public pure returns (uint spotPrice) { uint numer = bdiv(tokenBalanceIn, tokenWeightIn); uint denom = bdiv(tokenBalanceOut, tokenWeightOut); uint ratio = bdiv(numer, denom); uint scale = bdiv(BONE, bsub(BONE, swapFee)); return (spotPrice = bmul(ratio, scale)); } /********************************************************************************************** // calcOutGivenIn // // aO = tokenAmountOut // // bO = tokenBalanceOut // // bI = tokenBalanceIn / / bI \ (wI / wO) \ // // aI = tokenAmountIn aO = bO * | 1 - | -------------------------- | ^ | // // wI = tokenWeightIn \ \ ( bI + ( aI * ( 1 - sF )) / / // // wO = tokenWeightOut // // sF = swapFee // **********************************************************************************************/ function calcOutGivenIn( uint tokenBalanceIn, uint tokenWeightIn, uint tokenBalanceOut, uint tokenWeightOut, uint tokenAmountIn, uint swapFee ) public pure returns (uint tokenAmountOut, uint tokenInFee) { uint weightRatio = bdiv(tokenWeightIn, tokenWeightOut); uint adjustedIn = bsub(BONE, swapFee); adjustedIn = bmul(tokenAmountIn, adjustedIn); uint y = bdiv(tokenBalanceIn, badd(tokenBalanceIn, adjustedIn)); uint foo = bpow(y, weightRatio); uint bar = bsub(BONE, foo); tokenAmountOut = bmul(tokenBalanceOut, bar); tokenInFee = bsub(tokenAmountIn, adjustedIn); return (tokenAmountOut, tokenInFee); } /********************************************************************************************** // calcInGivenOut // // aI = tokenAmountIn // // bO = tokenBalanceOut / / bO \ (wO / wI) \ // // bI = tokenBalanceIn bI * | | ------------ | ^ - 1 | // // aO = tokenAmountOut aI = \ \ ( bO - aO ) / / // // wI = tokenWeightIn -------------------------------------------- // // wO = tokenWeightOut ( 1 - sF ) // // sF = swapFee // **********************************************************************************************/ function calcInGivenOut( uint tokenBalanceIn, uint tokenWeightIn, uint tokenBalanceOut, uint tokenWeightOut, uint tokenAmountOut, uint swapFee ) public pure returns (uint tokenAmountIn, uint tokenInFee) { uint weightRatio = bdiv(tokenWeightOut, tokenWeightIn); uint diff = bsub(tokenBalanceOut, tokenAmountOut); uint y = bdiv(tokenBalanceOut, diff); uint foo = bpow(y, weightRatio); foo = bsub(foo, BONE); foo = bmul(tokenBalanceIn, foo); tokenAmountIn = bsub(BONE, swapFee); tokenAmountIn = bdiv(foo, tokenAmountIn); tokenInFee = bdiv(foo, BONE); tokenInFee = bsub(tokenAmountIn, tokenInFee); return (tokenAmountIn, tokenInFee); } /********************************************************************************************** // calcPoolOutGivenSingleIn // // pAo = poolAmountOut / \ // // tAi = tokenAmountIn /// / // wI \ \\ \ wI \ // // wI = tokenWeightIn //| tAi *| 1 - || 1 - -- | * sF || + tBi \ -- \ // // tW = totalWeight pAo=|| \ \ \\ tW / // | ^ tW | * pS - pS // // tBi = tokenBalanceIn \\ ------------------------------------- / / // // pS = poolSupply \\ tBi / / // // sF = swapFee \ / // **********************************************************************************************/ function calcPoolOutGivenSingleIn( uint tokenBalanceIn, uint tokenWeightIn, uint poolSupply, uint totalWeight, uint tokenAmountIn, uint swapFee, uint reservesRatio ) public pure returns (uint poolAmountOut, uint reserves) { // Charge the trading fee for the proportion of tokenAi /// which is implicitly traded to the other pool tokens. // That proportion is (1- weightTokenIn) // tokenAiAfterFee = tAi * (1 - (1-weightTi) * poolFee); uint normalizedWeight = bdiv(tokenWeightIn, totalWeight); // Exact fee portion of `tokenAmountIn`, i.e. (1- Wt) uint zaz = bmul(bsub(BONE, normalizedWeight), swapFee); uint tokenAmountInAfterFee = bmul(tokenAmountIn, bsub(BONE, zaz)); reserves = calcReserves(tokenAmountIn, tokenAmountInAfterFee, reservesRatio); uint newTokenBalanceIn = badd(tokenBalanceIn, tokenAmountInAfterFee); uint tokenInRatio = bdiv(newTokenBalanceIn, tokenBalanceIn); // uint newPoolSupply = (ratioTi ^ weightTi) * poolSupply; uint poolRatio = bpow(tokenInRatio, normalizedWeight); uint newPoolSupply = bmul(poolRatio, poolSupply); poolAmountOut = bsub(newPoolSupply, poolSupply); return (poolAmountOut, reserves); } /********************************************************************************************** // calcSingleInGivenPoolOut // // tAi = tokenAmountIn //(pS + pAo)\ / 1 \\ // // pS = poolSupply || --------- | ^ | --------- || * bI - bI // // pAo = poolAmountOut \\ pS / \(wI / tW)// // // bI = balanceIn tAi = -------------------------------------------- // // wI = weightIn / wI \ // // tW = totalWeight | 1 - ---- | * sF // // sF = swapFee \ tW / // **********************************************************************************************/ function calcSingleInGivenPoolOut( uint tokenBalanceIn, uint tokenWeightIn, uint poolSupply, uint totalWeight, uint poolAmountOut, uint swapFee ) public pure returns (uint tokenAmountIn) { uint normalizedWeight = bdiv(tokenWeightIn, totalWeight); uint newPoolSupply = badd(poolSupply, poolAmountOut); uint poolRatio = bdiv(newPoolSupply, poolSupply); //uint newBalTi = poolRatio^(1/weightTi) * balTi; uint boo = bdiv(BONE, normalizedWeight); uint tokenInRatio = bpow(poolRatio, boo); uint newTokenBalanceIn = bmul(tokenInRatio, tokenBalanceIn); uint tokenAmountInAfterFee = bsub(newTokenBalanceIn, tokenBalanceIn); // Do reverse order of fees charged in joinswap_ExternAmountIn, this way // ``` pAo == joinswap_ExternAmountIn(Ti, joinswap_PoolAmountOut(pAo, Ti)) ``` //uint tAi = tAiAfterFee / (1 - (1-weightTi) * swapFee) ; uint zar = bmul(bsub(BONE, normalizedWeight), swapFee); tokenAmountIn = bdiv(tokenAmountInAfterFee, bsub(BONE, zar)); return tokenAmountIn; } /********************************************************************************************** // calcSingleOutGivenPoolIn // // tAo = tokenAmountOut / / \\ // // bO = tokenBalanceOut / // pS - (pAi * (1 - eF)) \ / 1 \ \\ // // pAi = poolAmountIn | bO - || ----------------------- | ^ | --------- | * b0 || // // ps = poolSupply \ \\ pS / \(wO / tW)/ // // // wI = tokenWeightIn tAo = \ \ // // // tW = totalWeight / / wO \ \ // // sF = swapFee * | 1 - | 1 - ---- | * sF | // // eF = exitFee \ \ tW / / // **********************************************************************************************/ function calcSingleOutGivenPoolIn( uint tokenBalanceOut, uint tokenWeightOut, uint poolSupply, uint totalWeight, uint poolAmountIn, uint swapFee ) public pure returns (uint tokenAmountOut) { uint normalizedWeight = bdiv(tokenWeightOut, totalWeight); // charge exit fee on the pool token side // pAiAfterExitFee = pAi*(1-exitFee) uint poolAmountInAfterExitFee = bmul(poolAmountIn, bsub(BONE, EXIT_FEE)); uint newPoolSupply = bsub(poolSupply, poolAmountInAfterExitFee); uint poolRatio = bdiv(newPoolSupply, poolSupply); // newBalTo = poolRatio^(1/weightTo) * balTo; uint tokenOutRatio = bpow(poolRatio, bdiv(BONE, normalizedWeight)); uint newTokenBalanceOut = bmul(tokenOutRatio, tokenBalanceOut); uint tokenAmountOutBeforeSwapFee = bsub(tokenBalanceOut, newTokenBalanceOut); // charge swap fee on the output token side //uint tAo = tAoBeforeSwapFee * (1 - (1-weightTo) * swapFee) uint zaz = bmul(bsub(BONE, normalizedWeight), swapFee); tokenAmountOut = bmul(tokenAmountOutBeforeSwapFee, bsub(BONE, zaz)); return tokenAmountOut; } /********************************************************************************************** // calcPoolInGivenSingleOut // // pAi = poolAmountIn // / tAo \\ / wO \ \ // // bO = tokenBalanceOut // | bO - -------------------------- |\ | ---- | \ // // tAo = tokenAmountOut pS - || \ 1 - ((1 - (tO / tW)) * sF)/ | ^ \ tW / * pS | // // ps = poolSupply \\ -----------------------------------/ / // // wO = tokenWeightOut pAi = \\ bO / / // // tW = totalWeight ------------------------------------------------------------- // // sF = swapFee ( 1 - eF ) // // eF = exitFee // **********************************************************************************************/ function calcPoolInGivenSingleOut( uint tokenBalanceOut, uint tokenWeightOut, uint poolSupply, uint totalWeight, uint tokenAmountOut, uint swapFee, uint reservesRatio ) public pure returns (uint poolAmountIn, uint reserves) { // charge swap fee on the output token side uint normalizedWeight = bdiv(tokenWeightOut, totalWeight); uint zar = bmul(bsub(BONE, normalizedWeight), swapFee); uint tokenAmountOutBeforeSwapFee = bdiv(tokenAmountOut, bsub(BONE, zar)); reserves = calcReserves(tokenAmountOutBeforeSwapFee, tokenAmountOut, reservesRatio); uint newTokenBalanceOut = bsub(tokenBalanceOut, tokenAmountOutBeforeSwapFee); uint tokenOutRatio = bdiv(newTokenBalanceOut, tokenBalanceOut); //uint newPoolSupply = (ratioTo ^ weightTo) * poolSupply; uint poolRatio = bpow(tokenOutRatio, normalizedWeight); uint newPoolSupply = bmul(poolRatio, poolSupply); uint poolAmountInAfterExitFee = bsub(poolSupply, newPoolSupply); // charge exit fee on the pool token side // pAi = pAiAfterExitFee/(1-exitFee) poolAmountIn = bdiv(poolAmountInAfterExitFee, bsub(BONE, EXIT_FEE)); return (poolAmountIn, reserves); } // `swapFeeAndReserves = amountWithFee - amountWithoutFee` is the swap fee in balancer. // We divide `swapFeeAndReserves` into halves, `actualSwapFee` and `reserves`. // `reserves` goes to the admin and `actualSwapFee` still goes to the liquidity // providers. function calcReserves(uint amountWithFee, uint amountWithoutFee, uint reservesRatio) internal pure returns (uint reserves) { require(amountWithFee >= amountWithoutFee, "ERR_MATH_APPROX"); require(reservesRatio <= BONE, "ERR_INVALID_RESERVE"); uint swapFeeAndReserves = bsub(amountWithFee, amountWithoutFee); reserves = bmul(swapFeeAndReserves, reservesRatio); require(swapFeeAndReserves >= reserves, "ERR_MATH_APPROX"); } function calcReservesFromFee(uint fee, uint reservesRatio) internal pure returns (uint reserves) { require(reservesRatio <= BONE, "ERR_INVALID_RESERVE"); reserves = bmul(fee, reservesRatio); } } contract BPool is BBronze, BToken, BMath { struct Record { bool bound; // is token bound to pool uint index; // private uint denorm; // denormalized weight uint balance; } event LOG_SWAP( address indexed caller, address indexed tokenIn, address indexed tokenOut, uint256 tokenAmountIn, uint256 tokenAmountOut, uint256 reservesAmount ); event LOG_JOIN( address indexed caller, address indexed tokenIn, uint256 tokenAmountIn, uint256 reservesAmount ); event LOG_EXIT( address indexed caller, address indexed tokenOut, uint256 tokenAmountOut, uint256 reservesAmount ); event LOG_DRAIN_RESERVES( address indexed caller, address indexed tokenOut, uint256 tokenAmountOut ); event LOG_ADD_RESERVES( address indexed token, uint256 reservesAmount ); event LOG_CALL( bytes4 indexed sig, address indexed caller, bytes data ) anonymous; modifier _logs_() { emit LOG_CALL(msg.sig, msg.sender, msg.data); _; } modifier _lock_() { require(!_mutex); _mutex = true; _; _mutex = false; } modifier _viewlock_() { require(!_mutex); _; } bool private _mutex; address private _factory; // BFactory address to push token exitFee to address private _controller; // has CONTROL role bool private _publicSwap; // true if PUBLIC can call SWAP functions // `setSwapFee` and `finalize` require CONTROL // `finalize` sets `PUBLIC can SWAP`, `PUBLIC can JOIN` uint private _swapFee; uint private _reservesRatio; bool private _finalized; address[] private _tokens; mapping(address=>Record) private _records; mapping(address=>uint) public totalReserves; uint private _totalWeight; constructor() public { _controller = msg.sender; _factory = msg.sender; _swapFee = MIN_FEE; _reservesRatio = DEFAULT_RESERVES_RATIO; _publicSwap = false; _finalized = false; } function isPublicSwap() external view returns (bool) { return _publicSwap; } function isFinalized() external view returns (bool) { return _finalized; } function isBound(address t) external view returns (bool) { return _records[t].bound; } function getNumTokens() external view returns (uint) { return _tokens.length; } function getCurrentTokens() external view _viewlock_ returns (address[] memory tokens) { return _tokens; } function getFinalTokens() external view _viewlock_ returns (address[] memory tokens) { require(_finalized); return _tokens; } function getDenormalizedWeight(address token) external view _viewlock_ returns (uint) { require(_records[token].bound); return _records[token].denorm; } function getTotalDenormalizedWeight() external view _viewlock_ returns (uint) { return _totalWeight; } function getNormalizedWeight(address token) external view _viewlock_ returns (uint) { require(_records[token].bound); uint denorm = _records[token].denorm; return bdiv(denorm, _totalWeight); } function getBalance(address token) external view _viewlock_ returns (uint) { require(_records[token].bound); return _records[token].balance; } function getSwapFee() external view _viewlock_ returns (uint) { return _swapFee; } function getReservesRatio() external view _viewlock_ returns (uint) { return _reservesRatio; } function getController() external view _viewlock_ returns (address) { return _controller; } function setSwapFee(uint swapFee) external _logs_ _lock_ { require(!_finalized); require(msg.sender == _controller); require(swapFee >= MIN_FEE); require(swapFee <= MAX_FEE); _swapFee = swapFee; } function setReservesRatio(uint reservesRatio) external _logs_ _lock_ { require(!_finalized); require(msg.sender == _controller); require(reservesRatio <= BONE); require(reservesRatio >= DEFAULT_RESERVES_RATIO); _reservesRatio = reservesRatio; } function setController(address manager) external _logs_ _lock_ { require(msg.sender == _controller); _controller = manager; } function setPublicSwap(bool public_) external _logs_ _lock_ { require(!_finalized); require(msg.sender == _controller); _publicSwap = public_; } function finalize() external _logs_ _lock_ { require(msg.sender == _controller); require(!_finalized); require(_tokens.length >= MIN_BOUND_TOKENS); _finalized = true; _publicSwap = true; _mintPoolShare(INIT_POOL_SUPPLY); _pushPoolShare(msg.sender, INIT_POOL_SUPPLY); } function bind(address token, uint balance, uint denorm) external _logs_ // _lock_ Bind does not lock because it jumps to `rebind`, which does { require(msg.sender == _controller); require(!_records[token].bound); require(!_finalized); require(_tokens.length < MAX_BOUND_TOKENS); _records[token] = Record({ bound: true, index: _tokens.length, denorm: 0, // balance and denorm will be validated balance: 0 // and set by `rebind` }); _tokens.push(token); rebind(token, balance, denorm); } function rebind(address token, uint balance, uint denorm) public _logs_ _lock_ { require(msg.sender == _controller); require(_records[token].bound); require(!_finalized); require(denorm >= MIN_WEIGHT); require(denorm <= MAX_WEIGHT); require(balance >= MIN_BALANCE); // Adjust the denorm and totalWeight uint oldWeight = _records[token].denorm; if (denorm > oldWeight) { _totalWeight = badd(_totalWeight, bsub(denorm, oldWeight)); require(_totalWeight <= MAX_TOTAL_WEIGHT); } else if (denorm < oldWeight) { _totalWeight = bsub(_totalWeight, bsub(oldWeight, denorm)); } _records[token].denorm = denorm; // Adjust the balance record and actual token balance uint oldBalance = _records[token].balance; _records[token].balance = balance; if (balance > oldBalance) { _pullUnderlying(token, msg.sender, bsub(balance, oldBalance)); } else if (balance < oldBalance) { // In this case liquidity is being withdrawn, so charge EXIT_FEE uint tokenBalanceWithdrawn = bsub(oldBalance, balance); uint tokenExitFee = bmul(tokenBalanceWithdrawn, EXIT_FEE); _pushUnderlying(token, msg.sender, bsub(tokenBalanceWithdrawn, tokenExitFee)); _pushUnderlying(token, _factory, tokenExitFee); } } function unbind(address token) external _logs_ _lock_ { require(msg.sender == _controller); require(_records[token].bound); require(!_finalized); uint tokenBalance = _records[token].balance; uint tokenExitFee = bmul(tokenBalance, EXIT_FEE); _totalWeight = bsub(_totalWeight, _records[token].denorm); // Swap the token-to-unbind with the last token, // then delete the last token uint index = _records[token].index; uint last = _tokens.length - 1; _tokens[index] = _tokens[last]; _records[_tokens[index]].index = index; _tokens.pop(); _records[token] = Record({ bound: false, index: 0, denorm: 0, balance: 0 }); _pushUnderlying(token, msg.sender, bsub(tokenBalance, tokenExitFee)); _pushUnderlying(token, _factory, tokenExitFee); } // Absorb any tokens that have been sent to this contract into the pool function gulp(address token) external _logs_ _lock_ { require(_records[token].bound); uint erc20Balance = IERC20(token).balanceOf(address(this)); uint reserves = totalReserves[token]; // `_records[token].balance` should be equaled to `bsub(erc20Balance, reserves)` unless there are extra // tokens transferred to this pool without calling `joinxxx`. require(_records[token].balance <= bsub(erc20Balance, reserves)); _records[token].balance = bsub(erc20Balance, reserves); } function seize(address token, uint amount) external _logs_ _lock_ { require(msg.sender == _controller); require(!_records[token].bound); uint bal = IERC20(token).balanceOf(address(this)); require(amount <= bal); _pushUnderlying(token, msg.sender, amount); } function getSpotPrice(address tokenIn, address tokenOut) external view _viewlock_ returns (uint spotPrice) { require(_records[tokenIn].bound, "ERR_NOT_BOUND"); require(_records[tokenOut].bound, "ERR_NOT_BOUND"); Record storage inRecord = _records[tokenIn]; Record storage outRecord = _records[tokenOut]; return calcSpotPrice(inRecord.balance, inRecord.denorm, outRecord.balance, outRecord.denorm, _swapFee); } function getSpotPriceSansFee(address tokenIn, address tokenOut) external view _viewlock_ returns (uint spotPrice) { require(_records[tokenIn].bound, "ERR_NOT_BOUND"); require(_records[tokenOut].bound, "ERR_NOT_BOUND"); Record storage inRecord = _records[tokenIn]; Record storage outRecord = _records[tokenOut]; return calcSpotPrice(inRecord.balance, inRecord.denorm, outRecord.balance, outRecord.denorm, 0); } function joinPool(uint poolAmountOut, uint[] calldata maxAmountsIn) external _logs_ _lock_ { require(_finalized, "ERR_NOT_FINALIZED"); uint poolTotal = totalSupply(); uint ratio = bdiv(poolAmountOut, poolTotal); require(ratio != 0, "ERR_MATH_APPROX"); for (uint i = 0; i < _tokens.length; i++) { address t = _tokens[i]; uint bal = _records[t].balance; uint tokenAmountIn = bmul(ratio, bal); require(tokenAmountIn != 0, "ERR_MATH_APPROX"); require(tokenAmountIn <= maxAmountsIn[i], "ERR_LIMIT_IN"); _records[t].balance = badd(_records[t].balance, tokenAmountIn); emit LOG_JOIN(msg.sender, t, tokenAmountIn, 0); _pullUnderlying(t, msg.sender, tokenAmountIn); } _mintPoolShare(poolAmountOut); _pushPoolShare(msg.sender, poolAmountOut); } function exitPool(uint poolAmountIn, uint[] calldata minAmountsOut) external _logs_ _lock_ { require(_finalized, "ERR_NOT_FINALIZED"); uint poolTotal = totalSupply(); uint exitFee = bmul(poolAmountIn, EXIT_FEE); uint pAiAfterExitFee = bsub(poolAmountIn, exitFee); uint ratio = bdiv(pAiAfterExitFee, poolTotal); require(ratio != 0, "ERR_MATH_APPROX"); _pullPoolShare(msg.sender, poolAmountIn); _pushPoolShare(_factory, exitFee); _burnPoolShare(pAiAfterExitFee); for (uint i = 0; i < _tokens.length; i++) { address t = _tokens[i]; uint bal = _records[t].balance; uint tokenAmountOut = bmul(ratio, bal); require(tokenAmountOut != 0, "ERR_MATH_APPROX"); require(tokenAmountOut >= minAmountsOut[i], "ERR_LIMIT_OUT"); _records[t].balance = bsub(_records[t].balance, tokenAmountOut); emit LOG_EXIT(msg.sender, t, tokenAmountOut, 0); _pushUnderlying(t, msg.sender, tokenAmountOut); } } function swapExactAmountIn( address tokenIn, uint tokenAmountIn, address tokenOut, uint minAmountOut, uint maxPrice ) external _logs_ _lock_ returns (uint tokenAmountOut, uint spotPriceAfter) { require(_records[tokenIn].bound, "ERR_NOT_BOUND"); require(_records[tokenOut].bound, "ERR_NOT_BOUND"); require(_publicSwap, "ERR_SWAP_NOT_PUBLIC"); Record storage inRecord = _records[address(tokenIn)]; Record storage outRecord = _records[address(tokenOut)]; require(tokenAmountIn <= bmul(inRecord.balance, MAX_IN_RATIO), "ERR_MAX_IN_RATIO"); uint spotPriceBefore = calcSpotPrice( inRecord.balance, inRecord.denorm, outRecord.balance, outRecord.denorm, _swapFee ); require(spotPriceBefore <= maxPrice, "ERR_BAD_LIMIT_PRICE"); uint tokenInFee; (tokenAmountOut, tokenInFee) = calcOutGivenIn( inRecord.balance, inRecord.denorm, outRecord.balance, outRecord.denorm, tokenAmountIn, _swapFee ); require(tokenAmountOut >= minAmountOut, "ERR_LIMIT_OUT"); uint reserves = calcReservesFromFee(tokenInFee, _reservesRatio); // Subtract `reserves`. inRecord.balance = bsub(badd(inRecord.balance, tokenAmountIn), reserves); outRecord.balance = bsub(outRecord.balance, tokenAmountOut); spotPriceAfter = calcSpotPrice( inRecord.balance, inRecord.denorm, outRecord.balance, outRecord.denorm, _swapFee ); require(spotPriceAfter >= spotPriceBefore, "ERR_MATH_APPROX"); require(spotPriceAfter <= maxPrice, "ERR_LIMIT_PRICE"); require(spotPriceBefore <= bdiv(tokenAmountIn, tokenAmountOut), "ERR_MATH_APPROX"); emit LOG_SWAP(msg.sender, tokenIn, tokenOut, tokenAmountIn, tokenAmountOut, reserves); totalReserves[address(tokenIn)] = badd(totalReserves[address(tokenIn)], reserves); emit LOG_ADD_RESERVES(address(tokenIn), reserves); _pullUnderlying(tokenIn, msg.sender, tokenAmountIn); _pushUnderlying(tokenOut, msg.sender, tokenAmountOut); return (tokenAmountOut, spotPriceAfter); } function swapExactAmountOut( address tokenIn, uint maxAmountIn, address tokenOut, uint tokenAmountOut, uint maxPrice ) external _logs_ _lock_ returns (uint tokenAmountIn, uint spotPriceAfter) { require(_records[tokenIn].bound, "ERR_NOT_BOUND"); require(_records[tokenOut].bound, "ERR_NOT_BOUND"); require(_publicSwap, "ERR_SWAP_NOT_PUBLIC"); Record storage inRecord = _records[address(tokenIn)]; Record storage outRecord = _records[address(tokenOut)]; require(tokenAmountOut <= bmul(outRecord.balance, MAX_OUT_RATIO), "ERR_MAX_OUT_RATIO"); uint spotPriceBefore = calcSpotPrice( inRecord.balance, inRecord.denorm, outRecord.balance, outRecord.denorm, _swapFee ); require(spotPriceBefore <= maxPrice, "ERR_BAD_LIMIT_PRICE"); uint tokenInFee; (tokenAmountIn, tokenInFee) = calcInGivenOut( inRecord.balance, inRecord.denorm, outRecord.balance, outRecord.denorm, tokenAmountOut, _swapFee ); require(tokenAmountIn <= maxAmountIn, "ERR_LIMIT_IN"); uint reserves = calcReservesFromFee( tokenInFee, _reservesRatio ); // Subtract `reserves` which is reserved for admin. inRecord.balance = bsub(badd(inRecord.balance, tokenAmountIn), reserves); outRecord.balance = bsub(outRecord.balance, tokenAmountOut); spotPriceAfter = calcSpotPrice( inRecord.balance, inRecord.denorm, outRecord.balance, outRecord.denorm, _swapFee ); require(spotPriceAfter >= spotPriceBefore, "ERR_MATH_APPROX"); require(spotPriceAfter <= maxPrice, "ERR_LIMIT_PRICE"); require(spotPriceBefore <= bdiv(tokenAmountIn, tokenAmountOut), "ERR_MATH_APPROX"); emit LOG_SWAP(msg.sender, tokenIn, tokenOut, tokenAmountIn, tokenAmountOut, reserves); totalReserves[address(tokenIn)] = badd(totalReserves[address(tokenIn)], reserves); emit LOG_ADD_RESERVES(address(tokenIn), reserves); _pullUnderlying(tokenIn, msg.sender, tokenAmountIn); _pushUnderlying(tokenOut, msg.sender, tokenAmountOut); return (tokenAmountIn, spotPriceAfter); } function joinswapExternAmountIn(address tokenIn, uint tokenAmountIn, uint minPoolAmountOut) external _logs_ _lock_ returns (uint poolAmountOut) { require(_finalized, "ERR_NOT_FINALIZED"); require(_records[tokenIn].bound, "ERR_NOT_BOUND"); require(tokenAmountIn <= bmul(_records[tokenIn].balance, MAX_IN_RATIO), "ERR_MAX_IN_RATIO"); Record storage inRecord = _records[tokenIn]; uint reserves; (poolAmountOut, reserves) = calcPoolOutGivenSingleIn( inRecord.balance, inRecord.denorm, _totalSupply, _totalWeight, tokenAmountIn, _swapFee, _reservesRatio ); require(poolAmountOut >= minPoolAmountOut, "ERR_LIMIT_OUT"); inRecord.balance = bsub(badd(inRecord.balance, tokenAmountIn), reserves); emit LOG_JOIN(msg.sender, tokenIn, tokenAmountIn, reserves); totalReserves[address(tokenIn)] = badd(totalReserves[address(tokenIn)], reserves); emit LOG_ADD_RESERVES(address(tokenIn), reserves); _mintPoolShare(poolAmountOut); _pushPoolShare(msg.sender, poolAmountOut); _pullUnderlying(tokenIn, msg.sender, tokenAmountIn); return poolAmountOut; } function joinswapPoolAmountOut(address tokenIn, uint poolAmountOut, uint maxAmountIn) external _logs_ _lock_ returns (uint tokenAmountIn) { require(_finalized, "ERR_NOT_FINALIZED"); require(_records[tokenIn].bound, "ERR_NOT_BOUND"); Record storage inRecord = _records[tokenIn]; tokenAmountIn = calcSingleInGivenPoolOut( inRecord.balance, inRecord.denorm, _totalSupply, _totalWeight, poolAmountOut, _swapFee ); require(tokenAmountIn != 0, "ERR_MATH_APPROX"); require(tokenAmountIn <= maxAmountIn, "ERR_LIMIT_IN"); require(tokenAmountIn <= bmul(_records[tokenIn].balance, MAX_IN_RATIO), "ERR_MAX_IN_RATIO"); uint tokenAmountInZeroFee = calcSingleInGivenPoolOut( inRecord.balance, inRecord.denorm, _totalSupply, _totalWeight, poolAmountOut, 0 ); uint reserves = calcReserves( tokenAmountIn, tokenAmountInZeroFee, _reservesRatio ); inRecord.balance = bsub(badd(inRecord.balance, tokenAmountIn), reserves); emit LOG_JOIN(msg.sender, tokenIn, tokenAmountIn, reserves); totalReserves[address(tokenIn)] = badd(totalReserves[address(tokenIn)], reserves); emit LOG_ADD_RESERVES(address(tokenIn), reserves); _mintPoolShare(poolAmountOut); _pushPoolShare(msg.sender, poolAmountOut); _pullUnderlying(tokenIn, msg.sender, tokenAmountIn); return tokenAmountIn; } function exitswapPoolAmountIn(address tokenOut, uint poolAmountIn, uint minAmountOut) external _logs_ _lock_ returns (uint tokenAmountOut) { require(_finalized, "ERR_NOT_FINALIZED"); require(_records[tokenOut].bound, "ERR_NOT_BOUND"); Record storage outRecord = _records[tokenOut]; tokenAmountOut = calcSingleOutGivenPoolIn( outRecord.balance, outRecord.denorm, _totalSupply, _totalWeight, poolAmountIn, _swapFee ); require(tokenAmountOut >= minAmountOut, "ERR_LIMIT_OUT"); require(tokenAmountOut <= bmul(_records[tokenOut].balance, MAX_OUT_RATIO), "ERR_MAX_OUT_RATIO"); uint tokenAmountOutZeroFee = calcSingleOutGivenPoolIn( outRecord.balance, outRecord.denorm, _totalSupply, _totalWeight, poolAmountIn, 0 ); uint reserves = calcReserves( tokenAmountOutZeroFee, tokenAmountOut, _reservesRatio ); outRecord.balance = bsub(bsub(outRecord.balance, tokenAmountOut), reserves); uint exitFee = bmul(poolAmountIn, EXIT_FEE); emit LOG_EXIT(msg.sender, tokenOut, tokenAmountOut, reserves); totalReserves[address(tokenOut)] = badd(totalReserves[address(tokenOut)], reserves); emit LOG_ADD_RESERVES(address(tokenOut), reserves); _pullPoolShare(msg.sender, poolAmountIn); _burnPoolShare(bsub(poolAmountIn, exitFee)); _pushPoolShare(_factory, exitFee); _pushUnderlying(tokenOut, msg.sender, tokenAmountOut); return tokenAmountOut; } function exitswapExternAmountOut(address tokenOut, uint tokenAmountOut, uint maxPoolAmountIn) external _logs_ _lock_ returns (uint poolAmountIn) { require(_finalized, "ERR_NOT_FINALIZED"); require(_records[tokenOut].bound, "ERR_NOT_BOUND"); require(tokenAmountOut <= bmul(_records[tokenOut].balance, MAX_OUT_RATIO), "ERR_MAX_OUT_RATIO"); Record storage outRecord = _records[tokenOut]; uint reserves; (poolAmountIn, reserves) = calcPoolInGivenSingleOut( outRecord.balance, outRecord.denorm, _totalSupply, _totalWeight, tokenAmountOut, _swapFee, _reservesRatio ); require(poolAmountIn != 0, "ERR_MATH_APPROX"); require(poolAmountIn <= maxPoolAmountIn, "ERR_LIMIT_IN"); outRecord.balance = bsub(bsub(outRecord.balance, tokenAmountOut), reserves); uint exitFee = bmul(poolAmountIn, EXIT_FEE); emit LOG_EXIT(msg.sender, tokenOut, tokenAmountOut, reserves); totalReserves[address(tokenOut)] = badd(totalReserves[address(tokenOut)], reserves); emit LOG_ADD_RESERVES(address(tokenOut), reserves); _pullPoolShare(msg.sender, poolAmountIn); _burnPoolShare(bsub(poolAmountIn, exitFee)); _pushPoolShare(_factory, exitFee); _pushUnderlying(tokenOut, msg.sender, tokenAmountOut); return poolAmountIn; } function drainTotalReserves(address reservesAddress) external _logs_ _lock_ { require(msg.sender == _factory); for (uint i = 0; i < _tokens.length; i++) { address t = _tokens[i]; uint tokenAmountOut = totalReserves[t]; totalReserves[t] = 0; emit LOG_DRAIN_RESERVES(reservesAddress, t, tokenAmountOut); _pushUnderlying(t, reservesAddress, tokenAmountOut); } } // == // 'Underlying' token-manipulation functions make external calls but are NOT locked // You must `_lock_` or otherwise ensure reentry-safety function _pullUnderlying(address erc20, address from, uint amount) internal { bool xfer = IERC20(erc20).transferFrom(from, address(this), amount); require(xfer, "ERR_ERC20_FALSE"); } function _pushUnderlying(address erc20, address to, uint amount) internal { bool xfer = IERC20(erc20).transfer(to, amount); require(xfer, "ERR_ERC20_FALSE"); } function _pullPoolShare(address from, uint amount) internal { _pull(from, amount); } function _pushPoolShare(address to, uint amount) internal { _push(to, amount); } function _mintPoolShare(uint amount) internal { _mint(amount); } function _burnPoolShare(uint amount) internal { _burn(amount); } }

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{"success": true, "error": null, "results": {"detectors": [{"check": "incorrect-equality", "impact": "Medium", "confidence": "High"}]}}

0x6c831c69ea4ce14427984512addc5c7cb8f8d4e1

pragma solidity 0.6.12; library Address { function isContract(address account) internal view returns (bool) { uint256 size; assembly { size := extcodesize(account) } return size > 0; } function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); require(isContract(target), "Address: call to non-contract"); (bool success, bytes memory returndata) = target.call{ value: value }(data); return _verifyCallResult(success, returndata, errorMessage); } function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) { require(isContract(target), "Address: static call to non-contract"); (bool success, bytes memory returndata) = target.staticcall(data); return _verifyCallResult(success, returndata, errorMessage); } function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall(target, data, "Address: low-level delegate call failed"); } function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { require(isContract(target), "Address: delegate call to non-contract"); (bool success, bytes memory returndata) = target.delegatecall(data); return _verifyCallResult(success, returndata, errorMessage); } function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) { if (success) { return returndata; } else { if (returndata.length > 0) { assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } abstract contract Context { function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } library EnumerableSet { // To implement this library for multiple types with as little code // repetition as possible, we write it in terms of a generic Set type with // bytes32 values. // The Set implementation uses private functions, and user-facing // implementations (such as AddressSet) are just wrappers around the // underlying Set. // This means that we can only create new EnumerableSets for types that fit // in bytes32. struct Set { // Storage of set values bytes32[] _values; // Position of the value in the `values` array, plus 1 because index 0 // means a value is not in the set. mapping (bytes32 => uint256) _indexes; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function _add(Set storage set, bytes32 value) private returns (bool) { if (!_contains(set, value)) { set._values.push(value); // The value is stored at length-1, but we add 1 to all indexes // and use 0 as a sentinel value set._indexes[value] = set._values.length; return true; } else { return false; } } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function _remove(Set storage set, bytes32 value) private returns (bool) { // We read and store the value's index to prevent multiple reads from the same storage slot uint256 valueIndex = set._indexes[value]; if (valueIndex != 0) { // Equivalent to contains(set, value) // To delete an element from the _values array in O(1), we swap the element to delete with the last one in // the array, and then remove the last element (sometimes called as 'swap and pop'). // This modifies the order of the array, as noted in {at}. uint256 toDeleteIndex = valueIndex - 1; uint256 lastIndex = set._values.length - 1; // When the value to delete is the last one, the swap operation is unnecessary. However, since this occurs // so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement. bytes32 lastvalue = set._values[lastIndex]; // Move the last value to the index where the value to delete is set._values[toDeleteIndex] = lastvalue; // Update the index for the moved value set._indexes[lastvalue] = toDeleteIndex + 1; // All indexes are 1-based // Delete the slot where the moved value was stored set._values.pop(); // Delete the index for the deleted slot delete set._indexes[value]; return true; } else { return false; } } /** * @dev Returns true if the value is in the set. O(1). */ function _contains(Set storage set, bytes32 value) private view returns (bool) { return set._indexes[value] != 0; } /** * @dev Returns the number of values on the set. O(1). */ function _length(Set storage set) private view returns (uint256) { return set._values.length; } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function _at(Set storage set, uint256 index) private view returns (bytes32) { require(set._values.length > index, "EnumerableSet: index out of bounds"); return set._values[index]; } // AddressSet struct AddressSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(AddressSet storage set, address value) internal returns (bool) { return _add(set._inner, bytes32(uint256(value))); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(AddressSet storage set, address value) internal returns (bool) { return _remove(set._inner, bytes32(uint256(value))); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(AddressSet storage set, address value) internal view returns (bool) { return _contains(set._inner, bytes32(uint256(value))); } /** * @dev Returns the number of values in the set. O(1). */ function length(AddressSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(AddressSet storage set, uint256 index) internal view returns (address) { return address(uint256(_at(set._inner, index))); } // UintSet struct UintSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(UintSet storage set, uint256 value) internal returns (bool) { return _add(set._inner, bytes32(value)); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(UintSet storage set, uint256 value) internal returns (bool) { return _remove(set._inner, bytes32(value)); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(UintSet storage set, uint256 value) internal view returns (bool) { return _contains(set._inner, bytes32(value)); } /** * @dev Returns the number of values on the set. O(1). */ function length(UintSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(UintSet storage set, uint256 index) internal view returns (uint256) { return uint256(_at(set._inner, index)); } } interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } library SafeMath { function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } abstract contract AccessControl is Context { using EnumerableSet for EnumerableSet.AddressSet; using Address for address; struct RoleData { EnumerableSet.AddressSet members; bytes32 adminRole; } mapping (bytes32 => RoleData) private _roles; bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00; /** * @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole` * * `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite * {RoleAdminChanged} not being emitted signaling this. * * _Available since v3.1._ */ event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole); /** * @dev Emitted when `account` is granted `role`. * * `sender` is the account that originated the contract call, an admin role * bearer except when using {_setupRole}. */ event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender); /** * @dev Emitted when `account` is revoked `role`. * * `sender` is the account that originated the contract call: * - if using `revokeRole`, it is the admin role bearer * - if using `renounceRole`, it is the role bearer (i.e. `account`) */ event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender); /** * @dev Returns `true` if `account` has been granted `role`. */ function hasRole(bytes32 role, address account) public view returns (bool) { return _roles[role].members.contains(account); } /** * @dev Returns the number of accounts that have `role`. Can be used * together with {getRoleMember} to enumerate all bearers of a role. */ function getRoleMemberCount(bytes32 role) public view returns (uint256) { return _roles[role].members.length(); } /** * @dev Returns one of the accounts that have `role`. `index` must be a * value between 0 and {getRoleMemberCount}, non-inclusive. * * Role bearers are not sorted in any particular way, and their ordering may * change at any point. * * WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure * you perform all queries on the same block. See the following * https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post] * for more information. */ function getRoleMember(bytes32 role, uint256 index) public view returns (address) { return _roles[role].members.at(index); } /** * @dev Returns the admin role that controls `role`. See {grantRole} and * {revokeRole}. * * To change a role's admin, use {_setRoleAdmin}. */ function getRoleAdmin(bytes32 role) public view returns (bytes32) { return _roles[role].adminRole; } /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function grantRole(bytes32 role, address account) public virtual { require(hasRole(_roles[role].adminRole, _msgSender()), "AccessControl: sender must be an admin to grant"); _grantRole(role, account); } /** * @dev Revokes `role` from `account`. * * If `account` had been granted `role`, emits a {RoleRevoked} event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function revokeRole(bytes32 role, address account) public virtual { require(hasRole(_roles[role].adminRole, _msgSender()), "AccessControl: sender must be an admin to revoke"); _revokeRole(role, account); } /** * @dev Revokes `role` from the calling account. * * Roles are often managed via {grantRole} and {revokeRole}: this function's * purpose is to provide a mechanism for accounts to lose their privileges * if they are compromised (such as when a trusted device is misplaced). * * If the calling account had been granted `role`, emits a {RoleRevoked} * event. * * Requirements: * * - the caller must be `account`. */ function renounceRole(bytes32 role, address account) public virtual { require(account == _msgSender(), "AccessControl: can only renounce roles for self"); _revokeRole(role, account); } /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. Note that unlike {grantRole}, this function doesn't perform any * checks on the calling account. * * [WARNING] * ==== * This function should only be called from the constructor when setting * up the initial roles for the system. * * Using this function in any other way is effectively circumventing the admin * system imposed by {AccessControl}. * ==== */ function _setupRole(bytes32 role, address account) internal virtual { _grantRole(role, account); } /** * @dev Sets `adminRole` as ``role``'s admin role. * * Emits a {RoleAdminChanged} event. */ function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual { emit RoleAdminChanged(role, _roles[role].adminRole, adminRole); _roles[role].adminRole = adminRole; } function _grantRole(bytes32 role, address account) private { if (_roles[role].members.add(account)) { emit RoleGranted(role, account, _msgSender()); } } function _revokeRole(bytes32 role, address account) private { if (_roles[role].members.remove(account)) { emit RoleRevoked(role, account, _msgSender()); } } } contract ERC20 is Context, IERC20 { using SafeMath for uint256; mapping (address => uint256) private _balances; mapping (address => mapping (address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; uint8 private _decimals; /** * @dev Sets the values for {name} and {symbol}, initializes {decimals} with * a default value of 18. * * To select a different value for {decimals}, use {_setupDecimals}. * * All three of these values are immutable: they can only be set once during * construction. */ constructor (string memory name, string memory symbol) public { _name = name; _symbol = symbol; _decimals = 18; } /** * @dev Returns the name of the token. */ function name() public view returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5,05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is * called. * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view returns (uint8) { return _decimals; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `recipient` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address recipient, uint256 amount) public virtual override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { _approve(_msgSender(), spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}. * * Requirements: * * - `sender` and `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. * - the caller must have allowance for ``sender``'s tokens of at least * `amount`. */ function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) { _transfer(sender, recipient, amount); _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance")); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue)); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero")); return true; } /** * @dev Moves tokens `amount` from `sender` to `recipient`. * * This is internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `sender` cannot be the zero address. * - `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. */ function _transfer(address sender, address recipient, uint256 amount) internal virtual { require(sender != address(0), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(sender, recipient, amount); _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance"); _balances[recipient] = _balances[recipient].add(amount); emit Transfer(sender, recipient, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements: * * - `to` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply = _totalSupply.add(amount); _balances[account] = _balances[account].add(amount); emit Transfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance"); _totalSupply = _totalSupply.sub(amount); emit Transfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens. * * This internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve(address owner, address spender, uint256 amount) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Sets {decimals} to a value other than the default one of 18. * * WARNING: This function should only be called from the constructor. Most * applications that interact with token contracts will not expect * {decimals} to ever change, and may work incorrectly if it does. */ function _setupDecimals(uint8 decimals_) internal { _decimals = decimals_; } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be to transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { } } contract BUBBLE is ERC20, AccessControl { bytes32 public constant MINTER_ROLE = keccak256("MINTER_ROLE"); bytes32 public constant BURNER_ROLE = keccak256("BURNER_ROLE"); constructor(uint256 initialSupply) public ERC20("BUBBLE", "BUB") { // Grant the contract deployer the default admin role: it will be able // to grant and revoke any roles _setupRole(DEFAULT_ADMIN_ROLE, msg.sender); _mint(msg.sender, initialSupply); } function mint(address to, uint256 amount) public { require(hasRole(MINTER_ROLE, msg.sender), "Caller is not a minter"); _mint(to, amount); } function burn(address from, uint256 amount) public { require(hasRole(BURNER_ROLE, msg.sender), "Caller is not a burner"); _burn(from, amount); } }

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{"success": true, "error": null, "results": {}}

0x6d19b2bf3a36a61530909ae65445a906d98a2fa8

pragma solidity 0.6.8; pragma experimental ABIEncoderV2; interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } library MerkleProof { /** * @dev Returns true if a `leaf` can be proved to be a part of a Merkle tree * defined by `root`. For this, a `proof` must be provided, containing * sibling hashes on the branch from the leaf to the root of the tree. Each * pair of leaves and each pair of pre-images are assumed to be sorted. */ function verify(bytes32[] memory proof, bytes32 root, bytes32 leaf) internal pure returns (bool) { bytes32 computedHash = leaf; for (uint256 i = 0; i < proof.length; i++) { bytes32 proofElement = proof[i]; if (computedHash <= proofElement) { // Hash(current computed hash + current element of the proof) computedHash = keccak256(abi.encodePacked(computedHash, proofElement)); } else { // Hash(current element of the proof + current computed hash) computedHash = keccak256(abi.encodePacked(proofElement, computedHash)); } } // Check if the computed hash (root) is equal to the provided root return computedHash == root; } } abstract contract Context { function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor () internal { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), msgSender); } /** * @dev Returns the address of the current owner. */ function owner() public view returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(_owner == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { emit OwnershipTransferred(_owner, address(0)); _owner = address(0); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } } contract MerkleRedeem is Ownable { IERC20 public token; event Claimed(address _claimant, uint256 _balance); // Recorded weeks mapping(uint => bytes32) public weekMerkleRoots; mapping(uint => mapping(address => bool)) public claimed; constructor( address _token ) public { token = IERC20(_token); } function disburse( address _liquidityProvider, uint _balance ) private { if (_balance > 0) { emit Claimed(_liquidityProvider, _balance); require(token.transfer(_liquidityProvider, _balance), "ERR_TRANSFER_FAILED"); } } function claimWeek( address _liquidityProvider, uint _week, uint _claimedBalance, bytes32[] memory _merkleProof ) public { require(!claimed[_week][_liquidityProvider]); require(verifyClaim(_liquidityProvider, _week, _claimedBalance, _merkleProof), 'Incorrect merkle proof'); claimed[_week][_liquidityProvider] = true; disburse(_liquidityProvider, _claimedBalance); } struct Claim { uint week; uint balance; bytes32[] merkleProof; } function claimWeeks( address _liquidityProvider, Claim[] memory claims ) public { uint totalBalance = 0; Claim memory claim ; for(uint i = 0; i < claims.length; i++) { claim = claims[i]; require(!claimed[claim.week][_liquidityProvider]); require(verifyClaim(_liquidityProvider, claim.week, claim.balance, claim.merkleProof), 'Incorrect merkle proof'); totalBalance += claim.balance; claimed[claim.week][_liquidityProvider] = true; } disburse(_liquidityProvider, totalBalance); } function claimStatus( address _liquidityProvider, uint _begin, uint _end ) external view returns (bool[] memory) { uint size = 1 + _end - _begin; bool[] memory arr = new bool[](size); for(uint i = 0; i < size; i++) { arr[i] = claimed[_begin + i][_liquidityProvider]; } return arr; } function merkleRoots( uint _begin, uint _end ) external view returns (bytes32[] memory) { uint size = 1 + _end - _begin; bytes32[] memory arr = new bytes32[](size); for(uint i = 0; i < size; i++) { arr[i] = weekMerkleRoots[_begin + i]; } return arr; } function verifyClaim( address _liquidityProvider, uint _week, uint _claimedBalance, bytes32[] memory _merkleProof ) public view returns (bool valid) { bytes32 leaf = keccak256(abi.encodePacked(_liquidityProvider, _claimedBalance)); return MerkleProof.verify(_merkleProof, weekMerkleRoots[_week], leaf); } function seedAllocations( uint _week, bytes32 _merkleRoot, uint _totalAllocation ) external onlyOwner { require(weekMerkleRoots[_week] == bytes32(0), "cannot rewrite merkle root"); weekMerkleRoots[_week] = _merkleRoot; require(token.transferFrom(msg.sender, address(this), _totalAllocation), "ERR_TRANSFER_FAILED"); } }

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0x6e0dade58d2d89ebbe7afc384e3e4f15b70b14d8

pragma solidity 0.6.6; interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } contract ERC20 is IERC20 { using SafeMath for uint256; mapping (address => uint256) private _balances; mapping (address => mapping (address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; uint8 private _decimals; address private _owner; /** * @dev Sets the values for {name}, {symbol} and {supplyInMil}, initializes {decimals} with * a default value of 18. * * * All three of these values are immutable: they can only be set once during * construction. */ constructor (string memory name, string memory symbol,uint256 supplyInMil) public { _name = name; _symbol = symbol; _decimals = 18; //1000000000000000000 = 1 token //100,000,000 = 100 milion _balances[msg.sender]= 1000000000000000000 * 1000000 * supplyInMil; _totalSupply =1000000000000000000 * 1000000 * supplyInMil; _owner=msg.sender; } /** * @dev Returns the name of the token. */ function name() public view returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view returns (string memory) { return _symbol; } function isOwner() public view returns (bool) { if(msg.sender==_owner){ return true; } else{ return false; } } function changeOwner(address newOwner) public virtual{ require(msg.sender==_owner, "Only the owner can change owner."); _owner=newOwner; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5,05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses. * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view returns (uint8) { return _decimals; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `recipient` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address recipient, uint256 amount) public virtual override returns (bool) { _transfer(msg.sender, recipient, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { _approve(msg.sender, spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}; * * Requirements: * - `sender` and `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. * - the caller must have allowance for ``sender``'s tokens of at least * `amount`. */ function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) { _transfer(sender, recipient, amount); _approve(sender, msg.sender, _allowances[sender][msg.sender].sub(amount, "ERC20: transfer amount exceeds allowance")); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { _approve(msg.sender, spender, _allowances[msg.sender][spender].add(addedValue)); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { _approve(msg.sender, spender, _allowances[msg.sender][spender].sub(subtractedValue, "ERC20: decreased allowance below zero")); return true; } /** * @dev Moves tokens `amount` from `sender` to `recipient`. * * This is internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `sender` cannot be the zero address. * - `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. */ function _transfer(address sender, address recipient, uint256 amount) internal virtual { require(sender != address(0), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(sender, recipient, amount); _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance"); _balances[recipient] = _balances[recipient].add(amount); emit Transfer(sender, recipient, amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens. * * This internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve(address owner, address spender, uint256 amount) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be to transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { } }

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0x6E56D58e7d704D52ce10B2FF70778F18579a8718

pragma solidity 0.6.6; pragma experimental ABIEncoderV2; contract DSAuthEvents { event LogSetAuthority(address indexed authority); event LogSetOwner(address indexed owner); } contract DSAuth is DSAuthEvents { DSAuthority public authority; address public owner; constructor() public { owner = msg.sender; emit LogSetOwner(msg.sender); } function setOwner(address owner_) public auth { owner = owner_; emit LogSetOwner(owner); } function setAuthority(DSAuthority authority_) public auth { authority = authority_; emit LogSetAuthority(address(authority)); } modifier auth { require(isAuthorized(msg.sender, msg.sig)); _; } function isAuthorized(address src, bytes4 sig) internal view returns (bool) { if (src == address(this)) { return true; } else if (src == owner) { return true; } else if (authority == DSAuthority(0)) { return false; } else { return authority.canCall(src, address(this), sig); } } } abstract contract DSAuthority { function canCall(address src, address dst, bytes4 sig) public virtual view returns (bool); } abstract contract DSGuard { function canCall(address src_, address dst_, bytes4 sig) public view virtual returns (bool); function permit(bytes32 src, bytes32 dst, bytes32 sig) public virtual; function forbid(bytes32 src, bytes32 dst, bytes32 sig) public virtual; function permit(address src, address dst, bytes32 sig) public virtual; function forbid(address src, address dst, bytes32 sig) public virtual; } abstract contract DSGuardFactory { function newGuard() public virtual returns (DSGuard guard); } contract DSMath { function add(uint256 x, uint256 y) internal pure returns (uint256 z) { require((z = x + y) >= x); } function sub(uint256 x, uint256 y) internal pure returns (uint256 z) { require((z = x - y) <= x); } function mul(uint256 x, uint256 y) internal pure returns (uint256 z) { require(y == 0 || (z = x * y) / y == x); } function div(uint256 x, uint256 y) internal pure returns (uint256 z) { return x / y; } function min(uint256 x, uint256 y) internal pure returns (uint256 z) { return x <= y ? x : y; } function max(uint256 x, uint256 y) internal pure returns (uint256 z) { return x >= y ? x : y; } function imin(int256 x, int256 y) internal pure returns (int256 z) { return x <= y ? x : y; } function imax(int256 x, int256 y) internal pure returns (int256 z) { return x >= y ? x : y; } uint256 constant WAD = 10**18; uint256 constant RAY = 10**27; function wmul(uint256 x, uint256 y) internal pure returns (uint256 z) { z = add(mul(x, y), WAD / 2) / WAD; } function rmul(uint256 x, uint256 y) internal pure returns (uint256 z) { z = add(mul(x, y), RAY / 2) / RAY; } function wdiv(uint256 x, uint256 y) internal pure returns (uint256 z) { z = add(mul(x, WAD), y / 2) / y; } function rdiv(uint256 x, uint256 y) internal pure returns (uint256 z) { z = add(mul(x, RAY), y / 2) / y; } // This famous algorithm is called "exponentiation by squaring" // and calculates x^n with x as fixed-point and n as regular unsigned. // // It's O(log n), instead of O(n) for naive repeated multiplication. // // These facts are why it works: // // If n is even, then x^n = (x^2)^(n/2). // If n is odd, then x^n = x * x^(n-1), // and applying the equation for even x gives // x^n = x * (x^2)^((n-1) / 2). // // Also, EVM division is flooring and // floor[(n-1) / 2] = floor[n / 2]. // function rpow(uint256 x, uint256 n) internal pure returns (uint256 z) { z = n % 2 != 0 ? x : RAY; for (n /= 2; n != 0; n /= 2) { x = rmul(x, x); if (n % 2 != 0) { z = rmul(z, x); } } } } contract DSNote { event LogNote( bytes4 indexed sig, address indexed guy, bytes32 indexed foo, bytes32 indexed bar, uint256 wad, bytes fax ) anonymous; modifier note { bytes32 foo; bytes32 bar; assembly { foo := calldataload(4) bar := calldataload(36) } emit LogNote(msg.sig, msg.sender, foo, bar, msg.value, msg.data); _; } } abstract contract DSProxy is DSAuth, DSNote { DSProxyCache public cache; // global cache for contracts constructor(address _cacheAddr) public { require(setCache(_cacheAddr)); } // solhint-disable-next-line no-empty-blocks receive() external payable {} // use the proxy to execute calldata _data on contract _code // function execute(bytes memory _code, bytes memory _data) // public // payable // virtual // returns (address target, bytes32 response); function execute(address _target, bytes memory _data) public payable virtual returns (bytes32 response); //set new cache function setCache(address _cacheAddr) public virtual payable returns (bool); } contract DSProxyCache { mapping(bytes32 => address) cache; function read(bytes memory _code) public view returns (address) { bytes32 hash = keccak256(_code); return cache[hash]; } function write(bytes memory _code) public returns (address target) { assembly { target := create(0, add(_code, 0x20), mload(_code)) switch iszero(extcodesize(target)) case 1 { // throw if contract failed to deploy revert(0, 0) } } bytes32 hash = keccak256(_code); cache[hash] = target; } } abstract contract DSProxyFactoryInterface { function build(address owner) public virtual returns (DSProxy proxy); } contract Migrations { address public owner; uint public last_completed_migration; modifier restricted() { if (msg.sender == owner) _; } constructor() public { owner = msg.sender; } function setCompleted(uint completed) public restricted { last_completed_migration = completed; } function upgrade(address new_address) public restricted { Migrations upgraded = Migrations(new_address); upgraded.setCompleted(last_completed_migration); } } contract AaveHelper is DSMath { using SafeERC20 for ERC20; address payable public constant WALLET_ADDR = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; address public constant DISCOUNT_ADDR = 0x1b14E8D511c9A4395425314f849bD737BAF8208F; uint public constant MANUAL_SERVICE_FEE = 400; // 0.25% Fee uint public constant AUTOMATIC_SERVICE_FEE = 333; // 0.3% Fee address public constant BOT_REGISTRY_ADDRESS = 0x637726f8b08a7ABE3aE3aCaB01A80E2d8ddeF77B; address public constant ETH_ADDR = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant AAVE_LENDING_POOL_ADDRESSES = 0x24a42fD28C976A61Df5D00D0599C34c4f90748c8; uint public constant NINETY_NINE_PERCENT_WEI = 999900000000000000; uint16 public constant AAVE_REFERRAL_CODE = 64; /// @param _collateralAddress underlying token address /// @param _user users address function getMaxCollateral(address _collateralAddress, address _user) public view returns (uint256) { address lendingPoolAddressDataProvider = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolDataProvider(); address lendingPoolCoreAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); // fetch all needed data // using LTV as tokenLiquidationThreshold (,uint256 totalCollateralETH, uint256 totalBorrowsETH,,uint256 currentLiquidationThreshold,,,) = ILendingPool(lendingPoolAddressDataProvider).calculateUserGlobalData(_user); (,uint256 tokenLiquidationThreshold,,) = ILendingPool(lendingPoolCoreAddress).getReserveConfiguration(_collateralAddress); uint256 collateralPrice = IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_collateralAddress); uint256 userTokenBalance = ILendingPool(lendingPoolCoreAddress).getUserUnderlyingAssetBalance(_collateralAddress, _user); uint256 userTokenBalanceEth = wmul(userTokenBalance, collateralPrice); // if borrow is 0, return whole user balance if (totalBorrowsETH == 0) { return userTokenBalance; } uint256 maxCollateralEth = div(sub(mul(currentLiquidationThreshold, totalCollateralETH), mul(totalBorrowsETH, 100)), currentLiquidationThreshold); /// @dev final amount can't be higher than users token balance maxCollateralEth = maxCollateralEth > userTokenBalanceEth ? userTokenBalanceEth : maxCollateralEth; // might happen due to wmul precision if (maxCollateralEth >= totalCollateralETH) { return totalCollateralETH; } // get sum of all other reserves multiplied with their liquidation thresholds by reversing formula uint256 a = sub(wmul(currentLiquidationThreshold, totalCollateralETH), wmul(tokenLiquidationThreshold, userTokenBalanceEth)); // add new collateral amount multiplied by its threshold, and then divide with new total collateral uint256 newLiquidationThreshold = wdiv(add(a, wmul(sub(userTokenBalanceEth, maxCollateralEth), tokenLiquidationThreshold)), sub(totalCollateralETH, maxCollateralEth)); // if new threshold is lower than first one, calculate new max collateral with newLiquidationThreshold if (newLiquidationThreshold < currentLiquidationThreshold) { maxCollateralEth = div(sub(mul(newLiquidationThreshold, totalCollateralETH), mul(totalBorrowsETH, 100)), newLiquidationThreshold); maxCollateralEth = maxCollateralEth > userTokenBalanceEth ? userTokenBalanceEth : maxCollateralEth; } return wmul(wdiv(maxCollateralEth, collateralPrice), NINETY_NINE_PERCENT_WEI); } /// @param _borrowAddress underlying token address /// @param _user users address function getMaxBorrow(address _borrowAddress, address _user) public view returns (uint256) { address lendingPoolAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); (,,,,uint256 availableBorrowsETH,,,) = ILendingPool(lendingPoolAddress).getUserAccountData(_user); uint256 borrowPrice = IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_borrowAddress); return wmul(wdiv(availableBorrowsETH, borrowPrice), NINETY_NINE_PERCENT_WEI); } /// @notice Calculates the fee amount /// @param _amount Amount that is converted /// @param _user Actuall user addr not DSProxy /// @param _gasCost Ether amount of gas we are spending for tx /// @param _tokenAddr token addr. of token we are getting for the fee /// @return feeAmount The amount we took for the fee function getFee(uint _amount, address _user, uint _gasCost, address _tokenAddr) internal returns (uint feeAmount) { address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); uint fee = MANUAL_SERVICE_FEE; if (BotRegistry(BOT_REGISTRY_ADDRESS).botList(tx.origin)) { fee = AUTOMATIC_SERVICE_FEE; } if (Discount(DISCOUNT_ADDR).isCustomFeeSet(_user)) { fee = Discount(DISCOUNT_ADDR).getCustomServiceFee(_user); } feeAmount = (fee == 0) ? 0 : (_amount / fee); if (_gasCost != 0) { uint256 price = IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_tokenAddr); _gasCost = wmul(_gasCost, price); feeAmount = add(feeAmount, _gasCost); } // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } if (_tokenAddr == ETH_ADDR) { WALLET_ADDR.transfer(feeAmount); } else { ERC20(_tokenAddr).safeTransfer(WALLET_ADDR, feeAmount); } } /// @notice Returns the owner of the DSProxy that called the contract function getUserAddress() internal view returns (address) { DSProxy proxy = DSProxy(payable(address(this))); return proxy.owner(); } /// @notice Approves token contract to pull underlying tokens from the DSProxy /// @param _tokenAddr Token we are trying to approve /// @param _caller Address which will gain the approval function approveToken(address _tokenAddr, address _caller) internal { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeApprove(_caller, uint256(-1)); } } /// @notice Send specific amount from contract to specific user /// @param _token Token we are trying to send /// @param _user User that should receive funds /// @param _amount Amount that should be sent function sendContractBalance(address _token, address _user, uint _amount) public { if (_token == ETH_ADDR) { payable(_user).transfer(_amount); } else { ERC20(_token).safeTransfer(_user, _amount); } } function sendFullContractBalance(address _token, address _user) public { if (_token == ETH_ADDR) { sendContractBalance(_token, _user, address(this).balance); } else { sendContractBalance(_token, _user, ERC20(_token).balanceOf(address(this))); } } } contract AaveSafetyRatio is AaveHelper { function getSafetyRatio(address _user) public view returns(uint256) { address lendingPoolAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); (,,uint256 totalBorrowsETH,,uint256 availableBorrowsETH,,,) = ILendingPool(lendingPoolAddress).getUserAccountData(_user); return wdiv(add(totalBorrowsETH, availableBorrowsETH), totalBorrowsETH); } } contract AdminAuth { using SafeERC20 for ERC20; address public owner; address public admin; modifier onlyOwner() { require(owner == msg.sender); _; } constructor() public { owner = msg.sender; } /// @notice Admin is set by owner first time, after that admin is super role and has permission to change owner /// @param _admin Address of multisig that becomes admin function setAdminByOwner(address _admin) public { require(msg.sender == owner); require(admin == address(0)); admin = _admin; } /// @notice Admin is able to set new admin /// @param _admin Address of multisig that becomes new admin function setAdminByAdmin(address _admin) public { require(msg.sender == admin); admin = _admin; } /// @notice Admin is able to change owner /// @param _owner Address of new owner function setOwnerByAdmin(address _owner) public { require(msg.sender == admin); owner = _owner; } /// @notice Destroy the contract function kill() public onlyOwner { selfdestruct(payable(owner)); } /// @notice withdraw stuck funds function withdrawStuckFunds(address _token, uint _amount) public onlyOwner { if (_token == 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE) { payable(owner).transfer(_amount); } else { ERC20(_token).safeTransfer(owner, _amount); } } } contract Auth is AdminAuth { bool public ALL_AUTHORIZED = false; mapping(address => bool) public authorized; modifier onlyAuthorized() { require(ALL_AUTHORIZED || authorized[msg.sender]); _; } constructor() public { authorized[msg.sender] = true; } function setAuthorized(address _user, bool _approved) public onlyOwner { authorized[_user] = _approved; } function setAllAuthorized(bool _authorized) public onlyOwner { ALL_AUTHORIZED = _authorized; } } contract ProxyPermission { address public constant FACTORY_ADDRESS = 0x5a15566417e6C1c9546523066500bDDBc53F88C7; /// @notice Called in the context of DSProxy to authorize an address /// @param _contractAddr Address which will be authorized function givePermission(address _contractAddr) public { address currAuthority = address(DSAuth(address(this)).authority()); DSGuard guard = DSGuard(currAuthority); if (currAuthority == address(0)) { guard = DSGuardFactory(FACTORY_ADDRESS).newGuard(); DSAuth(address(this)).setAuthority(DSAuthority(address(guard))); } guard.permit(_contractAddr, address(this), bytes4(keccak256("execute(address,bytes)"))); } /// @notice Called in the context of DSProxy to remove authority of an address /// @param _contractAddr Auth address which will be removed from authority list function removePermission(address _contractAddr) public { address currAuthority = address(DSAuth(address(this)).authority()); // if there is no authority, that means that contract doesn't have permission if (currAuthority == address(0)) { return; } DSGuard guard = DSGuard(currAuthority); guard.forbid(_contractAddr, address(this), bytes4(keccak256("execute(address,bytes)"))); } } contract CompoundMonitorProxy is AdminAuth { using SafeERC20 for ERC20; uint public CHANGE_PERIOD; address public monitor; address public newMonitor; address public lastMonitor; uint public changeRequestedTimestamp; mapping(address => bool) public allowed; event MonitorChangeInitiated(address oldMonitor, address newMonitor); event MonitorChangeCanceled(); event MonitorChangeFinished(address monitor); event MonitorChangeReverted(address monitor); // if someone who is allowed become malicious, owner can't be changed modifier onlyAllowed() { require(allowed[msg.sender] || msg.sender == owner); _; } modifier onlyMonitor() { require (msg.sender == monitor); _; } constructor(uint _changePeriod) public { CHANGE_PERIOD = _changePeriod * 1 days; } /// @notice Only monitor contract is able to call execute on users proxy /// @param _owner Address of cdp owner (users DSProxy address) /// @param _compoundSaverProxy Address of CompoundSaverProxy /// @param _data Data to send to CompoundSaverProxy function callExecute(address _owner, address _compoundSaverProxy, bytes memory _data) public payable onlyMonitor { // execute reverts if calling specific method fails DSProxyInterface(_owner).execute{value: msg.value}(_compoundSaverProxy, _data); // return if anything left if (address(this).balance > 0) { msg.sender.transfer(address(this).balance); } } /// @notice Allowed users are able to set Monitor contract without any waiting period first time /// @param _monitor Address of Monitor contract function setMonitor(address _monitor) public onlyAllowed { require(monitor == address(0)); monitor = _monitor; } /// @notice Allowed users are able to start procedure for changing monitor /// @dev after CHANGE_PERIOD needs to call confirmNewMonitor to actually make a change /// @param _newMonitor address of new monitor function changeMonitor(address _newMonitor) public onlyAllowed { require(changeRequestedTimestamp == 0); changeRequestedTimestamp = now; lastMonitor = monitor; newMonitor = _newMonitor; emit MonitorChangeInitiated(lastMonitor, newMonitor); } /// @notice At any point allowed users are able to cancel monitor change function cancelMonitorChange() public onlyAllowed { require(changeRequestedTimestamp > 0); changeRequestedTimestamp = 0; newMonitor = address(0); emit MonitorChangeCanceled(); } /// @notice Anyone is able to confirm new monitor after CHANGE_PERIOD if process is started function confirmNewMonitor() public onlyAllowed { require((changeRequestedTimestamp + CHANGE_PERIOD) < now); require(changeRequestedTimestamp != 0); require(newMonitor != address(0)); monitor = newMonitor; newMonitor = address(0); changeRequestedTimestamp = 0; emit MonitorChangeFinished(monitor); } /// @notice Its possible to revert monitor to last used monitor function revertMonitor() public onlyAllowed { require(lastMonitor != address(0)); monitor = lastMonitor; emit MonitorChangeReverted(monitor); } /// @notice Allowed users are able to add new allowed user /// @param _user Address of user that will be allowed function addAllowed(address _user) public onlyAllowed { allowed[_user] = true; } /// @notice Allowed users are able to remove allowed user /// @dev owner is always allowed even if someone tries to remove it from allowed mapping /// @param _user Address of allowed user function removeAllowed(address _user) public onlyAllowed { allowed[_user] = false; } function setChangePeriod(uint _periodInDays) public onlyAllowed { require(_periodInDays * 1 days > CHANGE_PERIOD); CHANGE_PERIOD = _periodInDays * 1 days; } /// @notice In case something is left in contract, owner is able to withdraw it /// @param _token address of token to withdraw balance function withdrawToken(address _token) public onlyOwner { uint balance = ERC20(_token).balanceOf(address(this)); ERC20(_token).safeTransfer(msg.sender, balance); } /// @notice In case something is left in contract, owner is able to withdraw it function withdrawEth() public onlyOwner { uint balance = address(this).balance; msg.sender.transfer(balance); } } contract CompoundSubscriptions is AdminAuth { struct CompoundHolder { address user; uint128 minRatio; uint128 maxRatio; uint128 optimalRatioBoost; uint128 optimalRatioRepay; bool boostEnabled; } struct SubPosition { uint arrPos; bool subscribed; } CompoundHolder[] public subscribers; mapping (address => SubPosition) public subscribersPos; uint public changeIndex; event Subscribed(address indexed user); event Unsubscribed(address indexed user); event Updated(address indexed user); event ParamUpdates(address indexed user, uint128, uint128, uint128, uint128, bool); /// @dev Called by the DSProxy contract which owns the Compound position /// @notice Adds the users Compound poistion in the list of subscriptions so it can be monitored /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalBoost Ratio amount which boost should target /// @param _optimalRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled function subscribe(uint128 _minRatio, uint128 _maxRatio, uint128 _optimalBoost, uint128 _optimalRepay, bool _boostEnabled) external { // if boost is not enabled, set max ratio to max uint uint128 localMaxRatio = _boostEnabled ? _maxRatio : uint128(-1); require(checkParams(_minRatio, localMaxRatio), "Must be correct params"); SubPosition storage subInfo = subscribersPos[msg.sender]; CompoundHolder memory subscription = CompoundHolder({ minRatio: _minRatio, maxRatio: localMaxRatio, optimalRatioBoost: _optimalBoost, optimalRatioRepay: _optimalRepay, user: msg.sender, boostEnabled: _boostEnabled }); changeIndex++; if (subInfo.subscribed) { subscribers[subInfo.arrPos] = subscription; emit Updated(msg.sender); emit ParamUpdates(msg.sender, _minRatio, localMaxRatio, _optimalBoost, _optimalRepay, _boostEnabled); } else { subscribers.push(subscription); subInfo.arrPos = subscribers.length - 1; subInfo.subscribed = true; emit Subscribed(msg.sender); } } /// @notice Called by the users DSProxy /// @dev Owner who subscribed cancels his subscription function unsubscribe() external { _unsubscribe(msg.sender); } /// @dev Checks limit if minRatio is bigger than max /// @param _minRatio Minimum ratio, bellow which repay can be triggered /// @param _maxRatio Maximum ratio, over which boost can be triggered /// @return Returns bool if the params are correct function checkParams(uint128 _minRatio, uint128 _maxRatio) internal pure returns (bool) { if (_minRatio > _maxRatio) { return false; } return true; } /// @dev Internal method to remove a subscriber from the list /// @param _user The actual address that owns the Compound position function _unsubscribe(address _user) internal { require(subscribers.length > 0, "Must have subscribers in the list"); SubPosition storage subInfo = subscribersPos[_user]; require(subInfo.subscribed, "Must first be subscribed"); address lastOwner = subscribers[subscribers.length - 1].user; SubPosition storage subInfo2 = subscribersPos[lastOwner]; subInfo2.arrPos = subInfo.arrPos; subscribers[subInfo.arrPos] = subscribers[subscribers.length - 1]; subscribers.pop(); // remove last element and reduce arr length changeIndex++; subInfo.subscribed = false; subInfo.arrPos = 0; emit Unsubscribed(msg.sender); } /// @dev Checks if the user is subscribed /// @param _user The actual address that owns the Compound position /// @return If the user is subscribed function isSubscribed(address _user) public view returns (bool) { SubPosition storage subInfo = subscribersPos[_user]; return subInfo.subscribed; } /// @dev Returns subscribtion information about a user /// @param _user The actual address that owns the Compound position /// @return Subscription information about the user if exists function getHolder(address _user) public view returns (CompoundHolder memory) { SubPosition storage subInfo = subscribersPos[_user]; return subscribers[subInfo.arrPos]; } /// @notice Helper method to return all the subscribed CDPs /// @return List of all subscribers function getSubscribers() public view returns (CompoundHolder[] memory) { return subscribers; } /// @notice Helper method for the frontend, returns all the subscribed CDPs paginated /// @param _page What page of subscribers you want /// @param _perPage Number of entries per page /// @return List of all subscribers for that page function getSubscribersByPage(uint _page, uint _perPage) public view returns (CompoundHolder[] memory) { CompoundHolder[] memory holders = new CompoundHolder[](_perPage); uint start = _page * _perPage; uint end = start + _perPage; end = (end > holders.length) ? holders.length : end; uint count = 0; for (uint i = start; i < end; i++) { holders[count] = subscribers[i]; count++; } return holders; } ////////////// ADMIN METHODS /////////////////// /// @notice Admin function to unsubscribe a CDP /// @param _user The actual address that owns the Compound position function unsubscribeByAdmin(address _user) public onlyOwner { SubPosition storage subInfo = subscribersPos[_user]; if (subInfo.subscribed) { _unsubscribe(_user); } } } contract CompoundSubscriptionsProxy is ProxyPermission { address public constant COMPOUND_SUBSCRIPTION_ADDRESS = 0x52015EFFD577E08f498a0CCc11905925D58D6207; address public constant COMPOUND_MONITOR_PROXY = 0xB1cF8DE8e791E4Ed1Bd86c03E2fc1f14389Cb10a; /// @notice Calls subscription contract and creates a DSGuard if non existent /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalRatioBoost Ratio amount which boost should target /// @param _optimalRatioRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled function subscribe( uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled ) public { givePermission(COMPOUND_MONITOR_PROXY); ICompoundSubscription(COMPOUND_SUBSCRIPTION_ADDRESS).subscribe( _minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled); } /// @notice Calls subscription contract and updated existing parameters /// @dev If subscription is non existent this will create one /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalRatioBoost Ratio amount which boost should target /// @param _optimalRatioRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled function update( uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled ) public { ICompoundSubscription(COMPOUND_SUBSCRIPTION_ADDRESS).subscribe(_minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled); } /// @notice Calls the subscription contract to unsubscribe the caller function unsubscribe() public { removePermission(COMPOUND_MONITOR_PROXY); ICompoundSubscription(COMPOUND_SUBSCRIPTION_ADDRESS).unsubscribe(); } } contract CompoundCreateTaker is ProxyPermission { using SafeERC20 for ERC20; address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); // solhint-disable-next-line const-name-snakecase DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); struct CreateInfo { address cCollAddress; address cBorrowAddress; uint depositAmount; } /// @notice Main function which will take a FL and open a leverage position /// @dev Call through DSProxy, if _exchangeData.destAddr is a token approve DSProxy /// @param _createInfo [cCollAddress, cBorrowAddress, depositAmount] /// @param _exchangeData Exchange data struct function openLeveragedLoan( CreateInfo memory _createInfo, SaverExchangeCore.ExchangeData memory _exchangeData, address payable _compReceiver ) public payable { uint loanAmount = _exchangeData.srcAmount; // Pull tokens from user if (_exchangeData.destAddr != ETH_ADDRESS) { ERC20(_exchangeData.destAddr).safeTransferFrom(msg.sender, address(this), _createInfo.depositAmount); } else { require(msg.value >= _createInfo.depositAmount, "Must send correct amount of eth"); } // Send tokens to FL receiver sendDeposit(_compReceiver, _exchangeData.destAddr); // Pack the struct data (uint[4] memory numData, address[6] memory cAddresses, bytes memory callData) = _packData(_createInfo, _exchangeData); bytes memory paramsData = abi.encode(numData, cAddresses, callData, address(this)); givePermission(_compReceiver); lendingPool.flashLoan(_compReceiver, _exchangeData.srcAddr, loanAmount, paramsData); removePermission(_compReceiver); logger.Log(address(this), msg.sender, "CompoundLeveragedLoan", abi.encode(_exchangeData.srcAddr, _exchangeData.destAddr, _exchangeData.srcAmount, _exchangeData.destAmount)); } function sendDeposit(address payable _compoundReceiver, address _token) internal { if (_token != ETH_ADDRESS) { ERC20(_token).safeTransfer(_compoundReceiver, ERC20(_token).balanceOf(address(this))); } _compoundReceiver.transfer(address(this).balance); } function _packData( CreateInfo memory _createInfo, SaverExchangeCore.ExchangeData memory exchangeData ) internal pure returns (uint[4] memory numData, address[6] memory cAddresses, bytes memory callData) { numData = [ exchangeData.srcAmount, exchangeData.destAmount, exchangeData.minPrice, exchangeData.price0x ]; cAddresses = [ _createInfo.cCollAddress, _createInfo.cBorrowAddress, exchangeData.srcAddr, exchangeData.destAddr, exchangeData.exchangeAddr, exchangeData.wrapper ]; callData = exchangeData.callData; } } contract CarefulMath { /** * @dev Possible error codes that we can return */ enum MathError { NO_ERROR, DIVISION_BY_ZERO, INTEGER_OVERFLOW, INTEGER_UNDERFLOW } /** * @dev Multiplies two numbers, returns an error on overflow. */ function mulUInt(uint a, uint b) internal pure returns (MathError, uint) { if (a == 0) { return (MathError.NO_ERROR, 0); } uint c = a * b; if (c / a != b) { return (MathError.INTEGER_OVERFLOW, 0); } else { return (MathError.NO_ERROR, c); } } /** * @dev Integer division of two numbers, truncating the quotient. */ function divUInt(uint a, uint b) internal pure returns (MathError, uint) { if (b == 0) { return (MathError.DIVISION_BY_ZERO, 0); } return (MathError.NO_ERROR, a / b); } /** * @dev Subtracts two numbers, returns an error on overflow (i.e. if subtrahend is greater than minuend). */ function subUInt(uint a, uint b) internal pure returns (MathError, uint) { if (b <= a) { return (MathError.NO_ERROR, a - b); } else { return (MathError.INTEGER_UNDERFLOW, 0); } } /** * @dev Adds two numbers, returns an error on overflow. */ function addUInt(uint a, uint b) internal pure returns (MathError, uint) { uint c = a + b; if (c >= a) { return (MathError.NO_ERROR, c); } else { return (MathError.INTEGER_OVERFLOW, 0); } } /** * @dev add a and b and then subtract c */ function addThenSubUInt(uint a, uint b, uint c) internal pure returns (MathError, uint) { (MathError err0, uint sum) = addUInt(a, b); if (err0 != MathError.NO_ERROR) { return (err0, 0); } return subUInt(sum, c); } } contract Exponential is CarefulMath { uint constant expScale = 1e18; uint constant halfExpScale = expScale/2; uint constant mantissaOne = expScale; struct Exp { uint mantissa; } /** * @dev Creates an exponential from numerator and denominator values. * Note: Returns an error if (`num` * 10e18) > MAX_INT, * or if `denom` is zero. */ function getExp(uint num, uint denom) pure internal returns (MathError, Exp memory) { (MathError err0, uint scaledNumerator) = mulUInt(num, expScale); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } (MathError err1, uint rational) = divUInt(scaledNumerator, denom); if (err1 != MathError.NO_ERROR) { return (err1, Exp({mantissa: 0})); } return (MathError.NO_ERROR, Exp({mantissa: rational})); } /** * @dev Adds two exponentials, returning a new exponential. */ function addExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) { (MathError error, uint result) = addUInt(a.mantissa, b.mantissa); return (error, Exp({mantissa: result})); } /** * @dev Subtracts two exponentials, returning a new exponential. */ function subExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) { (MathError error, uint result) = subUInt(a.mantissa, b.mantissa); return (error, Exp({mantissa: result})); } /** * @dev Multiply an Exp by a scalar, returning a new Exp. */ function mulScalar(Exp memory a, uint scalar) pure internal returns (MathError, Exp memory) { (MathError err0, uint scaledMantissa) = mulUInt(a.mantissa, scalar); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } return (MathError.NO_ERROR, Exp({mantissa: scaledMantissa})); } /** * @dev Multiply an Exp by a scalar, then truncate to return an unsigned integer. */ function mulScalarTruncate(Exp memory a, uint scalar) pure internal returns (MathError, uint) { (MathError err, Exp memory product) = mulScalar(a, scalar); if (err != MathError.NO_ERROR) { return (err, 0); } return (MathError.NO_ERROR, truncate(product)); } /** * @dev Multiply an Exp by a scalar, truncate, then add an to an unsigned integer, returning an unsigned integer. */ function mulScalarTruncateAddUInt(Exp memory a, uint scalar, uint addend) pure internal returns (MathError, uint) { (MathError err, Exp memory product) = mulScalar(a, scalar); if (err != MathError.NO_ERROR) { return (err, 0); } return addUInt(truncate(product), addend); } /** * @dev Divide an Exp by a scalar, returning a new Exp. */ function divScalar(Exp memory a, uint scalar) pure internal returns (MathError, Exp memory) { (MathError err0, uint descaledMantissa) = divUInt(a.mantissa, scalar); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } return (MathError.NO_ERROR, Exp({mantissa: descaledMantissa})); } /** * @dev Divide a scalar by an Exp, returning a new Exp. */ function divScalarByExp(uint scalar, Exp memory divisor) pure internal returns (MathError, Exp memory) { /* We are doing this as: getExp(mulUInt(expScale, scalar), divisor.mantissa) How it works: Exp = a / b; Scalar = s; `s / (a / b)` = `b * s / a` and since for an Exp `a = mantissa, b = expScale` */ (MathError err0, uint numerator) = mulUInt(expScale, scalar); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } return getExp(numerator, divisor.mantissa); } /** * @dev Divide a scalar by an Exp, then truncate to return an unsigned integer. */ function divScalarByExpTruncate(uint scalar, Exp memory divisor) pure internal returns (MathError, uint) { (MathError err, Exp memory fraction) = divScalarByExp(scalar, divisor); if (err != MathError.NO_ERROR) { return (err, 0); } return (MathError.NO_ERROR, truncate(fraction)); } /** * @dev Multiplies two exponentials, returning a new exponential. */ function mulExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) { (MathError err0, uint doubleScaledProduct) = mulUInt(a.mantissa, b.mantissa); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } // We add half the scale before dividing so that we get rounding instead of truncation. // See "Listing 6" and text above it at https://accu.org/index.php/journals/1717 // Without this change, a result like 6.6...e-19 will be truncated to 0 instead of being rounded to 1e-18. (MathError err1, uint doubleScaledProductWithHalfScale) = addUInt(halfExpScale, doubleScaledProduct); if (err1 != MathError.NO_ERROR) { return (err1, Exp({mantissa: 0})); } (MathError err2, uint product) = divUInt(doubleScaledProductWithHalfScale, expScale); // The only error `div` can return is MathError.DIVISION_BY_ZERO but we control `expScale` and it is not zero. assert(err2 == MathError.NO_ERROR); return (MathError.NO_ERROR, Exp({mantissa: product})); } /** * @dev Multiplies two exponentials given their mantissas, returning a new exponential. */ function mulExp(uint a, uint b) pure internal returns (MathError, Exp memory) { return mulExp(Exp({mantissa: a}), Exp({mantissa: b})); } /** * @dev Multiplies three exponentials, returning a new exponential. */ function mulExp3(Exp memory a, Exp memory b, Exp memory c) pure internal returns (MathError, Exp memory) { (MathError err, Exp memory ab) = mulExp(a, b); if (err != MathError.NO_ERROR) { return (err, ab); } return mulExp(ab, c); } /** * @dev Divides two exponentials, returning a new exponential. * (a/scale) / (b/scale) = (a/scale) * (scale/b) = a/b, * which we can scale as an Exp by calling getExp(a.mantissa, b.mantissa) */ function divExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) { return getExp(a.mantissa, b.mantissa); } /** * @dev Truncates the given exp to a whole number value. * For example, truncate(Exp{mantissa: 15 * expScale}) = 15 */ function truncate(Exp memory exp) pure internal returns (uint) { // Note: We are not using careful math here as we're performing a division that cannot fail return exp.mantissa / expScale; } /** * @dev Checks if first Exp is less than second Exp. */ function lessThanExp(Exp memory left, Exp memory right) pure internal returns (bool) { return left.mantissa < right.mantissa; } /** * @dev Checks if left Exp <= right Exp. */ function lessThanOrEqualExp(Exp memory left, Exp memory right) pure internal returns (bool) { return left.mantissa <= right.mantissa; } /** * @dev Checks if left Exp > right Exp. */ function greaterThanExp(Exp memory left, Exp memory right) pure internal returns (bool) { return left.mantissa > right.mantissa; } /** * @dev returns true if Exp is exactly zero */ function isZeroExp(Exp memory value) pure internal returns (bool) { return value.mantissa == 0; } } contract CompoundBorrowProxy { using SafeERC20 for ERC20; address public constant ETH_ADDR = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant COMPTROLLER_ADDR = 0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B; function borrow(address _cCollToken, address _cBorrowToken, address _borrowToken, uint _amount) public { address[] memory markets = new address[](2); markets[0] = _cCollToken; markets[1] = _cBorrowToken; ComptrollerInterface(COMPTROLLER_ADDR).enterMarkets(markets); require(CTokenInterface(_cBorrowToken).borrow(_amount) == 0); // withdraw funds to msg.sender if (_borrowToken != ETH_ADDR) { ERC20(_borrowToken).safeTransfer(msg.sender, ERC20(_borrowToken).balanceOf(address(this))); } else { msg.sender.transfer(address(this).balance); } } } contract AllowanceProxy is AdminAuth { using SafeERC20 for ERC20; address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; // TODO: Real saver exchange address SaverExchange saverExchange = SaverExchange(0x235abFAd01eb1BDa28Ef94087FBAA63E18074926); function callSell(SaverExchangeCore.ExchangeData memory exData) public payable { pullAndSendTokens(exData.srcAddr, exData.srcAmount); saverExchange.sell{value: msg.value}(exData, msg.sender); } function callBuy(SaverExchangeCore.ExchangeData memory exData) public payable { pullAndSendTokens(exData.srcAddr, exData.srcAmount); saverExchange.buy{value: msg.value}(exData, msg.sender); } function pullAndSendTokens(address _tokenAddr, uint _amount) internal { if (_tokenAddr == KYBER_ETH_ADDRESS) { require(msg.value >= _amount, "msg.value smaller than amount"); } else { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(saverExchange), _amount); } } function ownerChangeExchange(address payable _newExchange) public onlyOwner { saverExchange = SaverExchange(_newExchange); } } contract Prices is DSMath { address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; enum ActionType { SELL, BUY } /// @notice Returns the best estimated price from 2 exchanges /// @param _amount Amount of source tokens you want to exchange /// @param _srcToken Address of the source token /// @param _destToken Address of the destination token /// @param _type Type of action SELL|BUY /// @param _wrappers Array of wrapper addresses to compare /// @return (address, uint) The address of the best exchange and the exchange price function getBestPrice( uint256 _amount, address _srcToken, address _destToken, ActionType _type, address[] memory _wrappers ) public returns (address, uint256) { uint256[] memory rates = new uint256[](_wrappers.length); for (uint i=0; i<_wrappers.length; i++) { rates[i] = getExpectedRate(_wrappers[i], _srcToken, _destToken, _amount, _type); } if (_type == ActionType.SELL) { return getBiggestRate(_wrappers, rates); } else { return getSmallestRate(_wrappers, rates); } } /// @notice Return the expected rate from the exchange wrapper /// @dev In case of Oasis/Uniswap handles the different precision tokens /// @param _wrapper Address of exchange wrapper /// @param _srcToken From token /// @param _destToken To token /// @param _amount Amount to be exchanged /// @param _type Type of action SELL|BUY function getExpectedRate( address _wrapper, address _srcToken, address _destToken, uint256 _amount, ActionType _type ) public returns (uint256) { bool success; bytes memory result; if (_type == ActionType.SELL) { (success, result) = _wrapper.call(abi.encodeWithSignature( "getSellRate(address,address,uint256)", _srcToken, _destToken, _amount )); } else { (success, result) = _wrapper.call(abi.encodeWithSignature( "getBuyRate(address,address,uint256)", _srcToken, _destToken, _amount )); } if (success) { return sliceUint(result, 0); } return 0; } /// @notice Finds the biggest rate between exchanges, needed for sell rate /// @param _wrappers Array of wrappers to compare /// @param _rates Array of rates to compare function getBiggestRate( address[] memory _wrappers, uint256[] memory _rates ) internal pure returns (address, uint) { uint256 maxIndex = 0; // starting from 0 in case there is only one rate in array for (uint256 i=0; i<_rates.length; i++) { if (_rates[i] > _rates[maxIndex]) { maxIndex = i; } } return (_wrappers[maxIndex], _rates[maxIndex]); } /// @notice Finds the smallest rate between exchanges, needed for buy rate /// @param _wrappers Array of wrappers to compare /// @param _rates Array of rates to compare function getSmallestRate( address[] memory _wrappers, uint256[] memory _rates ) internal pure returns (address, uint) { uint256 minIndex = 0; // starting from 0 in case there is only one rate in array for (uint256 i=0; i<_rates.length; i++) { if ((_rates[i] < _rates[minIndex] && _rates[i] > 0) || _rates[minIndex] == 0) { minIndex = i; } } return (_wrappers[minIndex], _rates[minIndex]); } function getDecimals(address _token) internal view returns (uint256) { if (_token == KYBER_ETH_ADDRESS) return 18; return ERC20(_token).decimals(); } function sliceUint(bytes memory bs, uint256 start) internal pure returns (uint256) { require(bs.length >= start + 32, "slicing out of range"); uint256 x; assembly { x := mload(add(bs, add(0x20, start))) } return x; } } contract SaverExchangeHelper { using SafeERC20 for ERC20; address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant WETH_ADDRESS = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address payable public constant WALLET_ID = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; address public constant DISCOUNT_ADDRESS = 0x1b14E8D511c9A4395425314f849bD737BAF8208F; address public constant SAVER_EXCHANGE_REGISTRY = 0x25dd3F51e0C3c3Ff164DDC02A8E4D65Bb9cBB12D; address public constant ERC20_PROXY_0X = 0x95E6F48254609A6ee006F7D493c8e5fB97094ceF; address public constant ZRX_ALLOWLIST_ADDR = 0x4BA1f38427b33B8ab7Bb0490200dAE1F1C36823F; function getDecimals(address _token) internal view returns (uint256) { if (_token == KYBER_ETH_ADDRESS) return 18; return ERC20(_token).decimals(); } function getBalance(address _tokenAddr) internal view returns (uint balance) { if (_tokenAddr == KYBER_ETH_ADDRESS) { balance = address(this).balance; } else { balance = ERC20(_tokenAddr).balanceOf(address(this)); } } function approve0xProxy(address _tokenAddr, uint _amount) internal { if (_tokenAddr != KYBER_ETH_ADDRESS) { ERC20(_tokenAddr).safeApprove(address(ERC20_PROXY_0X), _amount); } } function sendLeftover(address _srcAddr, address _destAddr, address payable _to) internal { // send back any leftover ether or tokens if (address(this).balance > 0) { _to.transfer(address(this).balance); } if (getBalance(_srcAddr) > 0) { ERC20(_srcAddr).safeTransfer(_to, getBalance(_srcAddr)); } if (getBalance(_destAddr) > 0) { ERC20(_destAddr).safeTransfer(_to, getBalance(_destAddr)); } } function sliceUint(bytes memory bs, uint256 start) internal pure returns (uint256) { require(bs.length >= start + 32, "slicing out of range"); uint256 x; assembly { x := mload(add(bs, add(0x20, start))) } return x; } } contract SaverExchangeRegistry is AdminAuth { mapping(address => bool) private wrappers; constructor() public { wrappers[0x880A845A85F843a5c67DB2061623c6Fc3bB4c511] = true; wrappers[0x4c9B55f2083629A1F7aDa257ae984E03096eCD25] = true; wrappers[0x42A9237b872368E1bec4Ca8D26A928D7d39d338C] = true; } function addWrapper(address _wrapper) public onlyOwner { wrappers[_wrapper] = true; } function removeWrapper(address _wrapper) public onlyOwner { wrappers[_wrapper] = false; } function isWrapper(address _wrapper) public view returns(bool) { return wrappers[_wrapper]; } } abstract contract CEtherInterface { function mint() external virtual payable; function repayBorrow() external virtual payable; } abstract contract Cat { struct Ilk { address flip; // Liquidator uint256 chop; // Liquidation Penalty [ray] uint256 lump; // Liquidation Quantity [wad] } mapping (bytes32 => Ilk) public ilks; } abstract contract CompoundOracleInterface { function getUnderlyingPrice(address cToken) external view virtual returns (uint); } abstract contract ComptrollerInterface { function enterMarkets(address[] calldata cTokens) external virtual returns (uint256[] memory); function exitMarket(address cToken) external virtual returns (uint256); function getAssetsIn(address account) external virtual view returns (address[] memory); function markets(address account) public virtual view returns (bool, uint256); function getAccountLiquidity(address account) external virtual view returns (uint256, uint256, uint256); function claimComp(address holder) virtual public; function oracle() public virtual view returns (address); } abstract contract DSProxyInterface { /// Truffle wont compile if this isn't commented // function execute(bytes memory _code, bytes memory _data) // public virtual // payable // returns (address, bytes32); function execute(address _target, bytes memory _data) public virtual payable returns (bytes32); function setCache(address _cacheAddr) public virtual payable returns (bool); function owner() public virtual returns (address); } abstract contract GemLike { function approve(address, uint) public virtual; function transfer(address, uint) public virtual; function transferFrom(address, address, uint) public virtual; function deposit() public virtual payable; function withdraw(uint) public virtual; } abstract contract ManagerLike { function cdpCan(address, uint, address) public virtual view returns (uint); function ilks(uint) public virtual view returns (bytes32); function owns(uint) public virtual view returns (address); function urns(uint) public virtual view returns (address); function vat() public virtual view returns (address); function open(bytes32) public virtual returns (uint); function give(uint, address) public virtual; function cdpAllow(uint, address, uint) public virtual; function urnAllow(address, uint) public virtual; function frob(uint, int, int) public virtual; function frob(uint, address, int, int) public virtual; function flux(uint, address, uint) public virtual; function move(uint, address, uint) public virtual; function exit(address, uint, address, uint) public virtual; function quit(uint, address) public virtual; function enter(address, uint) public virtual; function shift(uint, uint) public virtual; } abstract contract VatLike { function can(address, address) public virtual view returns (uint); function ilks(bytes32) public virtual view returns (uint, uint, uint, uint, uint); function dai(address) public virtual view returns (uint); function urns(bytes32, address) public virtual view returns (uint, uint); function frob(bytes32, address, address, address, int, int) public virtual; function hope(address) public virtual; function move(address, address, uint) public virtual; } abstract contract GemJoinLike { function dec() public virtual returns (uint); function gem() public virtual returns (GemLike); function join(address, uint) public virtual payable; function exit(address, uint) public virtual; } abstract contract GNTJoinLike { function bags(address) public virtual view returns (address); function make(address) public virtual returns (address); } abstract contract DaiJoinLike { function vat() public virtual returns (VatLike); function dai() public virtual returns (GemLike); function join(address, uint) public virtual payable; function exit(address, uint) public virtual; } abstract contract HopeLike { function hope(address) public virtual; function nope(address) public virtual; } abstract contract EndLike { function fix(bytes32) public virtual view returns (uint); function cash(bytes32, uint) public virtual; function free(bytes32) public virtual; function pack(uint) public virtual; function skim(bytes32, address) public virtual; } abstract contract JugLike { function drip(bytes32) public virtual; } abstract contract PotLike { function chi() public virtual view returns (uint); function pie(address) public virtual view returns (uint); function drip() public virtual; function join(uint) public virtual; function exit(uint) public virtual; } abstract contract ProxyRegistryLike { function proxies(address) public virtual view returns (address); function build(address) public virtual returns (address); } abstract contract ProxyLike { function owner() public virtual view returns (address); } abstract contract DssProxyActions { function daiJoin_join(address apt, address urn, uint wad) public virtual; function transfer(address gem, address dst, uint wad) public virtual; function ethJoin_join(address apt, address urn) public virtual payable; function gemJoin_join(address apt, address urn, uint wad, bool transferFrom) public virtual payable; function hope(address obj, address usr) public virtual; function nope(address obj, address usr) public virtual; function open(address manager, bytes32 ilk, address usr) public virtual returns (uint cdp); function give(address manager, uint cdp, address usr) public virtual; function giveToProxy(address proxyRegistry, address manager, uint cdp, address dst) public virtual; function cdpAllow(address manager, uint cdp, address usr, uint ok) public virtual; function urnAllow(address manager, address usr, uint ok) public virtual; function flux(address manager, uint cdp, address dst, uint wad) public virtual; function move(address manager, uint cdp, address dst, uint rad) public virtual; function frob(address manager, uint cdp, int dink, int dart) public virtual; function frob(address manager, uint cdp, address dst, int dink, int dart) public virtual; function quit(address manager, uint cdp, address dst) public virtual; function enter(address manager, address src, uint cdp) public virtual; function shift(address manager, uint cdpSrc, uint cdpOrg) public virtual; function makeGemBag(address gemJoin) public virtual returns (address bag); function lockETH(address manager, address ethJoin, uint cdp) public virtual payable; function safeLockETH(address manager, address ethJoin, uint cdp, address owner) public virtual payable; function lockGem(address manager, address gemJoin, uint cdp, uint wad, bool transferFrom) public virtual; function safeLockGem(address manager, address gemJoin, uint cdp, uint wad, bool transferFrom, address owner) public virtual; function freeETH(address manager, address ethJoin, uint cdp, uint wad) public virtual; function freeGem(address manager, address gemJoin, uint cdp, uint wad) public virtual; function draw(address manager, address jug, address daiJoin, uint cdp, uint wad) public virtual; function wipe(address manager, address daiJoin, uint cdp, uint wad) public virtual; function safeWipe(address manager, address daiJoin, uint cdp, uint wad, address owner) public virtual; function wipeAll(address manager, address daiJoin, uint cdp) public virtual; function safeWipeAll(address manager, address daiJoin, uint cdp, address owner) public virtual; function lockETHAndDraw(address manager, address jug, address ethJoin, address daiJoin, uint cdp, uint wadD) public virtual payable; function openLockETHAndDraw(address manager, address jug, address ethJoin, address daiJoin, bytes32 ilk, uint wadD) public virtual payable returns (uint cdp); function lockGemAndDraw(address manager, address jug, address gemJoin, address daiJoin, uint cdp, uint wadC, uint wadD, bool transferFrom) public virtual; function openLockGemAndDraw(address manager, address jug, address gemJoin, address daiJoin, bytes32 ilk, uint wadC, uint wadD, bool transferFrom) public virtual returns (uint cdp); function openLockGNTAndDraw(address manager, address jug, address gntJoin, address daiJoin, bytes32 ilk, uint wadC, uint wadD) public virtual returns (address bag, uint cdp); function wipeAndFreeETH(address manager, address ethJoin, address daiJoin, uint cdp, uint wadC, uint wadD) public virtual; function wipeAllAndFreeETH(address manager, address ethJoin, address daiJoin, uint cdp, uint wadC) public virtual; function wipeAndFreeGem(address manager, address gemJoin, address daiJoin, uint cdp, uint wadC, uint wadD) public virtual; function wipeAllAndFreeGem(address manager, address gemJoin, address daiJoin, uint cdp, uint wadC) public virtual; } abstract contract DaiJoin { function vat() public virtual returns (Vat); function dai() public virtual returns (Gem); function join(address, uint) public virtual payable; function exit(address, uint) public virtual; } abstract contract DssProxyActionsDsr { function join(address daiJoin, address pot, uint wad) virtual public; function exit(address daiJoin, address pot, uint wad) virtual public; function exitAll(address daiJoin, address pot) virtual public; } interface ERC20 { function totalSupply() external view returns (uint256 supply); function balanceOf(address _owner) external view returns (uint256 balance); function transfer(address _to, uint256 _value) external returns (bool success); function transferFrom(address _from, address _to, uint256 _value) external returns (bool success); function approve(address _spender, uint256 _value) external returns (bool success); function allowance(address _owner, address _spender) external view returns (uint256 remaining); function decimals() external view returns (uint256 digits); event Approval(address indexed _owner, address indexed _spender, uint256 _value); } interface ExchangeInterface { function swapEtherToToken(uint256 _ethAmount, address _tokenAddress, uint256 _maxAmount) external payable returns (uint256, uint256); function swapTokenToEther(address _tokenAddress, uint256 _amount, uint256 _maxAmount) external returns (uint256); function swapTokenToToken(address _src, address _dest, uint256 _amount) external payable returns (uint256); function getExpectedRate(address src, address dest, uint256 srcQty) external view returns (uint256 expectedRate); } interface ExchangeInterfaceV2 { function sell(address _srcAddr, address _destAddr, uint _srcAmount) external payable returns (uint); function buy(address _srcAddr, address _destAddr, uint _destAmount) external payable returns(uint); function getSellRate(address _srcAddr, address _destAddr, uint _srcAmount) external view returns (uint); function getBuyRate(address _srcAddr, address _destAddr, uint _srcAmount) external view returns (uint); } abstract contract Faucet { function gulp(address) public virtual; } abstract contract Flipper { function bids(uint _bidId) public virtual returns (uint256, uint256, address, uint48, uint48, address, address, uint256); function tend(uint id, uint lot, uint bid) virtual external; function dent(uint id, uint lot, uint bid) virtual external; function deal(uint id) virtual external; } abstract contract GasTokenInterface is ERC20 { function free(uint256 value) public virtual returns (bool success); function freeUpTo(uint256 value) public virtual returns (uint256 freed); function freeFrom(address from, uint256 value) public virtual returns (bool success); function freeFromUpTo(address from, uint256 value) public virtual returns (uint256 freed); } abstract contract Gem { function dec() virtual public returns (uint); function gem() virtual public returns (Gem); function join(address, uint) virtual public payable; function exit(address, uint) virtual public; function approve(address, uint) virtual public; function transfer(address, uint) virtual public returns (bool); function transferFrom(address, address, uint) virtual public returns (bool); function deposit() virtual public payable; function withdraw(uint) virtual public; function allowance(address, address) virtual public returns (uint); } abstract contract GetCdps { function getCdpsAsc(address manager, address guy) external view virtual returns (uint[] memory ids, address[] memory urns, bytes32[] memory ilks); function getCdpsDesc(address manager, address guy) external view virtual returns (uint[] memory ids, address[] memory urns, bytes32[] memory ilks); } abstract contract IAToken { function redeem(uint256 _amount) external virtual; } abstract contract IAaveSubscription { function subscribe(uint128 _minRatio, uint128 _maxRatio, uint128 _optimalBoost, uint128 _optimalRepay, bool _boostEnabled) public virtual; function unsubscribe() public virtual; } abstract contract ICompoundSubscription { function subscribe(uint128 _minRatio, uint128 _maxRatio, uint128 _optimalBoost, uint128 _optimalRepay, bool _boostEnabled) public virtual; function unsubscribe() public virtual; } abstract contract ILendingPool { function flashLoan( address payable _receiver, address _reserve, uint _amount, bytes calldata _params) external virtual; function deposit(address _reserve, uint256 _amount, uint16 _referralCode) external virtual payable; function setUserUseReserveAsCollateral(address _reserve, bool _useAsCollateral) external virtual; function borrow(address _reserve, uint256 _amount, uint256 _interestRateMode, uint16 _referralCode) external virtual; function repay( address _reserve, uint256 _amount, address payable _onBehalfOf) external virtual payable; function swapBorrowRateMode(address _reserve) external virtual; function getReserves() external virtual view returns(address[] memory); /// @param _reserve underlying token address function getReserveData(address _reserve) external virtual view returns ( uint256 totalLiquidity, // reserve total liquidity uint256 availableLiquidity, // reserve available liquidity for borrowing uint256 totalBorrowsStable, // total amount of outstanding borrows at Stable rate uint256 totalBorrowsVariable, // total amount of outstanding borrows at Variable rate uint256 liquidityRate, // current deposit APY of the reserve for depositors, in Ray units. uint256 variableBorrowRate, // current variable rate APY of the reserve pool, in Ray units. uint256 stableBorrowRate, // current stable rate APY of the reserve pool, in Ray units. uint256 averageStableBorrowRate, // current average stable borrow rate uint256 utilizationRate, // expressed as total borrows/total liquidity. uint256 liquidityIndex, // cumulative liquidity index uint256 variableBorrowIndex, // cumulative variable borrow index address aTokenAddress, // aTokens contract address for the specific _reserve uint40 lastUpdateTimestamp // timestamp of the last update of reserve data ); /// @param _user users address function getUserAccountData(address _user) external virtual view returns ( uint256 totalLiquidityETH, // user aggregated deposits across all the reserves. In Wei uint256 totalCollateralETH, // user aggregated collateral across all the reserves. In Wei uint256 totalBorrowsETH, // user aggregated outstanding borrows across all the reserves. In Wei uint256 totalFeesETH, // user aggregated current outstanding fees in ETH. In Wei uint256 availableBorrowsETH, // user available amount to borrow in ETH uint256 currentLiquidationThreshold, // user current average liquidation threshold across all the collaterals deposited uint256 ltv, // user average Loan-to-Value between all the collaterals uint256 healthFactor // user current Health Factor ); /// @param _reserve underlying token address /// @param _user users address function getUserReserveData(address _reserve, address _user) external virtual view returns ( uint256 currentATokenBalance, // user current reserve aToken balance uint256 currentBorrowBalance, // user current reserve outstanding borrow balance uint256 principalBorrowBalance, // user balance of borrowed asset uint256 borrowRateMode, // user borrow rate mode either Stable or Variable uint256 borrowRate, // user current borrow rate APY uint256 liquidityRate, // user current earn rate on _reserve uint256 originationFee, // user outstanding loan origination fee uint256 variableBorrowIndex, // user variable cumulative index uint256 lastUpdateTimestamp, // Timestamp of the last data update bool usageAsCollateralEnabled // Whether the user's current reserve is enabled as a collateral ); function getReserveConfigurationData(address _reserve) external virtual view returns ( uint256 ltv, uint256 liquidationThreshold, uint256 liquidationBonus, address rateStrategyAddress, bool usageAsCollateralEnabled, bool borrowingEnabled, bool stableBorrowRateEnabled, bool isActive ); // ------------------ LendingPoolCoreData ------------------------ function getReserveATokenAddress(address _reserve) public virtual view returns (address); function getReserveConfiguration(address _reserve) external virtual view returns (uint256, uint256, uint256, bool); function getUserUnderlyingAssetBalance(address _reserve, address _user) public virtual view returns (uint256); function getReserveCurrentLiquidityRate(address _reserve) public virtual view returns (uint256); function getReserveCurrentVariableBorrowRate(address _reserve) public virtual view returns (uint256); function getReserveTotalLiquidity(address _reserve) public virtual view returns (uint256); function getReserveAvailableLiquidity(address _reserve) public virtual view returns (uint256); function getReserveTotalBorrowsVariable(address _reserve) public virtual view returns (uint256); // ---------------- LendingPoolDataProvider --------------------- function calculateUserGlobalData(address _user) public virtual view returns ( uint256 totalLiquidityBalanceETH, uint256 totalCollateralBalanceETH, uint256 totalBorrowBalanceETH, uint256 totalFeesETH, uint256 currentLtv, uint256 currentLiquidationThreshold, uint256 healthFactor, bool healthFactorBelowThreshold ); } abstract contract ILendingPoolAddressesProvider { function getLendingPool() public virtual view returns (address); function getLendingPoolCore() public virtual view returns (address payable); function getLendingPoolConfigurator() public virtual view returns (address); function getLendingPoolDataProvider() public virtual view returns (address); function getLendingPoolParametersProvider() public virtual view returns (address); function getTokenDistributor() public virtual view returns (address); function getFeeProvider() public virtual view returns (address); function getLendingPoolLiquidationManager() public virtual view returns (address); function getLendingPoolManager() public virtual view returns (address); function getPriceOracle() public virtual view returns (address); function getLendingRateOracle() public virtual view returns (address); } abstract contract ILoanShifter { function getLoanAmount(uint, address) public view virtual returns(uint); function getUnderlyingAsset(address _addr) public view virtual returns (address); } abstract contract IPriceOracleGetterAave { function getAssetPrice(address _asset) external virtual view returns (uint256); function getAssetsPrices(address[] calldata _assets) external virtual view returns(uint256[] memory); function getSourceOfAsset(address _asset) external virtual view returns(address); function getFallbackOracle() external virtual view returns(address); } abstract contract ITokenInterface is ERC20 { function assetBalanceOf(address _owner) public virtual view returns (uint256); function mint(address receiver, uint256 depositAmount) external virtual returns (uint256 mintAmount); function burn(address receiver, uint256 burnAmount) external virtual returns (uint256 loanAmountPaid); function tokenPrice() public virtual view returns (uint256 price); } abstract contract Join { bytes32 public ilk; function dec() virtual public view returns (uint); function gem() virtual public view returns (Gem); function join(address, uint) virtual public payable; function exit(address, uint) virtual public; } abstract contract Jug { struct Ilk { uint256 duty; uint256 rho; } mapping (bytes32 => Ilk) public ilks; function drip(bytes32) public virtual returns (uint); } abstract contract KyberNetworkProxyInterface { function maxGasPrice() external virtual view returns (uint256); function getUserCapInWei(address user) external virtual view returns (uint256); function getUserCapInTokenWei(address user, ERC20 token) external virtual view returns (uint256); function enabled() external virtual view returns (bool); function info(bytes32 id) external virtual view returns (uint256); function getExpectedRate(ERC20 src, ERC20 dest, uint256 srcQty) public virtual view returns (uint256 expectedRate, uint256 slippageRate); function tradeWithHint( ERC20 src, uint256 srcAmount, ERC20 dest, address destAddress, uint256 maxDestAmount, uint256 minConversionRate, address walletId, bytes memory hint ) public virtual payable returns (uint256); function trade( ERC20 src, uint256 srcAmount, ERC20 dest, address destAddress, uint256 maxDestAmount, uint256 minConversionRate, address walletId ) public virtual payable returns (uint256); function swapEtherToToken(ERC20 token, uint256 minConversionRate) external virtual payable returns (uint256); function swapTokenToEther(ERC20 token, uint256 tokenQty, uint256 minRate) external virtual payable returns (uint256); function swapTokenToToken(ERC20 src, uint256 srcAmount, ERC20 dest, uint256 minConversionRate) public virtual returns (uint256); } abstract contract Manager { function last(address) virtual public returns (uint); function cdpCan(address, uint, address) virtual public view returns (uint); function ilks(uint) virtual public view returns (bytes32); function owns(uint) virtual public view returns (address); function urns(uint) virtual public view returns (address); function vat() virtual public view returns (address); function open(bytes32, address) virtual public returns (uint); function give(uint, address) virtual public; function cdpAllow(uint, address, uint) virtual public; function urnAllow(address, uint) virtual public; function frob(uint, int, int) virtual public; function flux(uint, address, uint) virtual public; function move(uint, address, uint) virtual public; function exit(address, uint, address, uint) virtual public; function quit(uint, address) virtual public; function enter(address, uint) virtual public; function shift(uint, uint) virtual public; } abstract contract OasisInterface { function getBuyAmount(address tokenToBuy, address tokenToPay, uint256 amountToPay) external virtual view returns (uint256 amountBought); function getPayAmount(address tokenToPay, address tokenToBuy, uint256 amountToBuy) public virtual view returns (uint256 amountPaid); function sellAllAmount(address pay_gem, uint256 pay_amt, address buy_gem, uint256 min_fill_amount) public virtual returns (uint256 fill_amt); function buyAllAmount(address buy_gem, uint256 buy_amt, address pay_gem, uint256 max_fill_amount) public virtual returns (uint256 fill_amt); } abstract contract Osm { mapping(address => uint256) public bud; function peep() external view virtual returns (bytes32, bool); } abstract contract OsmMom { mapping (bytes32 => address) public osms; } abstract contract OtcInterface { function buyAllAmount(address, uint256, address, uint256) public virtual returns (uint256); function getPayAmount(address, address, uint256) public virtual view returns (uint256); function getBuyAmount(address, address, uint256) public virtual view returns (uint256); } abstract contract PipInterface { function read() public virtual returns (bytes32); } abstract contract ProxyRegistryInterface { function proxies(address _owner) public virtual view returns (address); function build(address) public virtual returns (address); } abstract contract SaverExchangeInterface { function getBestPrice( uint256 _amount, address _srcToken, address _destToken, uint256 _exchangeType ) public view virtual returns (address, uint256); } abstract contract Spotter { struct Ilk { PipInterface pip; uint256 mat; } mapping (bytes32 => Ilk) public ilks; uint256 public par; } abstract contract TokenInterface { function allowance(address, address) public virtual returns (uint256); function balanceOf(address) public virtual returns (uint256); function approve(address, uint256) public virtual; function transfer(address, uint256) public virtual returns (bool); function transferFrom(address, address, uint256) public virtual returns (bool); function deposit() public virtual payable; function withdraw(uint256) public virtual; } abstract contract UniswapExchangeInterface { function getEthToTokenInputPrice(uint256 eth_sold) external virtual view returns (uint256 tokens_bought); function getEthToTokenOutputPrice(uint256 tokens_bought) external virtual view returns (uint256 eth_sold); function getTokenToEthInputPrice(uint256 tokens_sold) external virtual view returns (uint256 eth_bought); function getTokenToEthOutputPrice(uint256 eth_bought) external virtual view returns (uint256 tokens_sold); function tokenToEthTransferInput( uint256 tokens_sold, uint256 min_eth, uint256 deadline, address recipient ) external virtual returns (uint256 eth_bought); function ethToTokenTransferInput(uint256 min_tokens, uint256 deadline, address recipient) external virtual payable returns (uint256 tokens_bought); function tokenToTokenTransferInput( uint256 tokens_sold, uint256 min_tokens_bought, uint256 min_eth_bought, uint256 deadline, address recipient, address token_addr ) external virtual returns (uint256 tokens_bought); function ethToTokenTransferOutput( uint256 tokens_bought, uint256 deadline, address recipient ) external virtual payable returns (uint256 eth_sold); function tokenToEthTransferOutput( uint256 eth_bought, uint256 max_tokens, uint256 deadline, address recipient ) external virtual returns (uint256 tokens_sold); function tokenToTokenTransferOutput( uint256 tokens_bought, uint256 max_tokens_sold, uint256 max_eth_sold, uint256 deadline, address recipient, address token_addr ) external virtual returns (uint256 tokens_sold); } abstract contract UniswapFactoryInterface { function getExchange(address token) external view virtual returns (address exchange); } abstract contract UniswapRouterInterface { function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline) external virtual returns (uint[] memory amounts); function swapExactTokensForTokens( uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline ) external virtual returns (uint[] memory amounts); function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline) external virtual returns (uint[] memory amounts); function swapTokensForExactTokens( uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline ) external virtual returns (uint[] memory amounts); function getAmountsOut(uint amountIn, address[] memory path) public virtual view returns (uint[] memory amounts); function getAmountsIn(uint amountOut, address[] memory path) public virtual view returns (uint[] memory amounts); } abstract contract Vat { struct Urn { uint256 ink; // Locked Collateral [wad] uint256 art; // Normalised Debt [wad] } struct Ilk { uint256 Art; // Total Normalised Debt [wad] uint256 rate; // Accumulated Rates [ray] uint256 spot; // Price with Safety Margin [ray] uint256 line; // Debt Ceiling [rad] uint256 dust; // Urn Debt Floor [rad] } mapping (bytes32 => mapping (address => Urn )) public urns; mapping (bytes32 => Ilk) public ilks; mapping (bytes32 => mapping (address => uint)) public gem; // [wad] function can(address, address) virtual public view returns (uint); function dai(address) virtual public view returns (uint); function frob(bytes32, address, address, address, int, int) virtual public; function hope(address) virtual public; function move(address, address, uint) virtual public; function fork(bytes32, address, address, int, int) virtual public; } contract DefisaverLogger { event LogEvent( address indexed contractAddress, address indexed caller, string indexed logName, bytes data ); // solhint-disable-next-line func-name-mixedcase function Log(address _contract, address _caller, string memory _logName, bytes memory _data) public { emit LogEvent(_contract, _caller, _logName, _data); } } contract MCDMonitorProxyV2 is AdminAuth { uint public CHANGE_PERIOD; address public monitor; address public newMonitor; address public lastMonitor; uint public changeRequestedTimestamp; mapping(address => bool) public allowed; event MonitorChangeInitiated(address oldMonitor, address newMonitor); event MonitorChangeCanceled(); event MonitorChangeFinished(address monitor); event MonitorChangeReverted(address monitor); // if someone who is allowed become malicious, owner can't be changed modifier onlyAllowed() { require(allowed[msg.sender] || msg.sender == owner); _; } modifier onlyMonitor() { require (msg.sender == monitor); _; } constructor(uint _changePeriod) public { CHANGE_PERIOD = _changePeriod * 1 days; } /// @notice Only monitor contract is able to call execute on users proxy /// @param _owner Address of cdp owner (users DSProxy address) /// @param _saverProxy Address of MCDSaverProxy /// @param _data Data to send to MCDSaverProxy function callExecute(address _owner, address _saverProxy, bytes memory _data) public payable onlyMonitor { // execute reverts if calling specific method fails DSProxyInterface(_owner).execute{value: msg.value}(_saverProxy, _data); // return if anything left if (address(this).balance > 0) { msg.sender.transfer(address(this).balance); } } /// @notice Allowed users are able to set Monitor contract without any waiting period first time /// @param _monitor Address of Monitor contract function setMonitor(address _monitor) public onlyAllowed { require(monitor == address(0)); monitor = _monitor; } /// @notice Allowed users are able to start procedure for changing monitor /// @dev after CHANGE_PERIOD needs to call confirmNewMonitor to actually make a change /// @param _newMonitor address of new monitor function changeMonitor(address _newMonitor) public onlyAllowed { require(changeRequestedTimestamp == 0); changeRequestedTimestamp = now; lastMonitor = monitor; newMonitor = _newMonitor; emit MonitorChangeInitiated(lastMonitor, newMonitor); } /// @notice At any point allowed users are able to cancel monitor change function cancelMonitorChange() public onlyAllowed { require(changeRequestedTimestamp > 0); changeRequestedTimestamp = 0; newMonitor = address(0); emit MonitorChangeCanceled(); } /// @notice Anyone is able to confirm new monitor after CHANGE_PERIOD if process is started function confirmNewMonitor() public onlyAllowed { require((changeRequestedTimestamp + CHANGE_PERIOD) < now); require(changeRequestedTimestamp != 0); require(newMonitor != address(0)); monitor = newMonitor; newMonitor = address(0); changeRequestedTimestamp = 0; emit MonitorChangeFinished(monitor); } /// @notice Its possible to revert monitor to last used monitor function revertMonitor() public onlyAllowed { require(lastMonitor != address(0)); monitor = lastMonitor; emit MonitorChangeReverted(monitor); } /// @notice Allowed users are able to add new allowed user /// @param _user Address of user that will be allowed function addAllowed(address _user) public onlyAllowed { allowed[_user] = true; } /// @notice Allowed users are able to remove allowed user /// @dev owner is always allowed even if someone tries to remove it from allowed mapping /// @param _user Address of allowed user function removeAllowed(address _user) public onlyAllowed { allowed[_user] = false; } function setChangePeriod(uint _periodInDays) public onlyAllowed { require(_periodInDays * 1 days > CHANGE_PERIOD); CHANGE_PERIOD = _periodInDays * 1 days; } } contract MCDPriceVerifier is AdminAuth { OsmMom public osmMom = OsmMom(0x76416A4d5190d071bfed309861527431304aA14f); Manager public manager = Manager(0x5ef30b9986345249bc32d8928B7ee64DE9435E39); mapping(address => bool) public authorized; function verifyVaultNextPrice(uint _nextPrice, uint _cdpId) public view returns(bool) { require(authorized[msg.sender]); bytes32 ilk = manager.ilks(_cdpId); return verifyNextPrice(_nextPrice, ilk); } function verifyNextPrice(uint _nextPrice, bytes32 _ilk) public view returns(bool) { require(authorized[msg.sender]); address osmAddress = osmMom.osms(_ilk); uint whitelisted = Osm(osmAddress).bud(address(this)); // If contracts doesn't have access return true if (whitelisted != 1) return true; (bytes32 price, bool has) = Osm(osmAddress).peep(); return has ? uint(price) == _nextPrice : false; } function setAuthorized(address _address, bool _allowed) public onlyOwner { authorized[_address] = _allowed; } } abstract contract StaticV2 { enum Method { Boost, Repay } struct CdpHolder { uint128 minRatio; uint128 maxRatio; uint128 optimalRatioBoost; uint128 optimalRatioRepay; address owner; uint cdpId; bool boostEnabled; bool nextPriceEnabled; } struct SubPosition { uint arrPos; bool subscribed; } } contract SubscriptionsInterfaceV2 { function subscribe(uint _cdpId, uint128 _minRatio, uint128 _maxRatio, uint128 _optimalBoost, uint128 _optimalRepay, bool _boostEnabled, bool _nextPriceEnabled) external {} function unsubscribe(uint _cdpId) external {} } contract SubscriptionsProxyV2 { address public constant MONITOR_PROXY_ADDRESS = 0x7456f4218874eAe1aF8B83a64848A1B89fEB7d7C; address public constant OLD_SUBSCRIPTION = 0x83152CAA0d344a2Fd428769529e2d490A88f4393; address public constant FACTORY_ADDRESS = 0x5a15566417e6C1c9546523066500bDDBc53F88C7; function migrate(uint _cdpId, uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled, bool _nextPriceEnabled, address _subscriptions) public { SubscriptionsInterfaceV2(OLD_SUBSCRIPTION).unsubscribe(_cdpId); subscribe(_cdpId, _minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled, _nextPriceEnabled, _subscriptions); } function subscribe(uint _cdpId, uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled, bool _nextPriceEnabled, address _subscriptions) public { address currAuthority = address(DSAuth(address(this)).authority()); DSGuard guard = DSGuard(currAuthority); if (currAuthority == address(0)) { guard = DSGuardFactory(FACTORY_ADDRESS).newGuard(); DSAuth(address(this)).setAuthority(DSAuthority(address(guard))); } guard.permit(MONITOR_PROXY_ADDRESS, address(this), bytes4(keccak256("execute(address,bytes)"))); SubscriptionsInterfaceV2(_subscriptions).subscribe(_cdpId, _minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled, _nextPriceEnabled); } function update(uint _cdpId, uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled, bool _nextPriceEnabled, address _subscriptions) public { SubscriptionsInterfaceV2(_subscriptions).subscribe(_cdpId, _minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled, _nextPriceEnabled); } function unsubscribe(uint _cdpId, address _subscriptions) public { SubscriptionsInterfaceV2(_subscriptions).unsubscribe(_cdpId); } } contract SubscriptionsV2 is AdminAuth, StaticV2 { bytes32 internal constant ETH_ILK = 0x4554482d41000000000000000000000000000000000000000000000000000000; bytes32 internal constant BAT_ILK = 0x4241542d41000000000000000000000000000000000000000000000000000000; address public constant MANAGER_ADDRESS = 0x5ef30b9986345249bc32d8928B7ee64DE9435E39; address public constant VAT_ADDRESS = 0x35D1b3F3D7966A1DFe207aa4514C12a259A0492B; address public constant SPOTTER_ADDRESS = 0x65C79fcB50Ca1594B025960e539eD7A9a6D434A3; CdpHolder[] public subscribers; mapping (uint => SubPosition) public subscribersPos; mapping (bytes32 => uint) public minLimits; uint public changeIndex; Manager public manager = Manager(MANAGER_ADDRESS); Vat public vat = Vat(VAT_ADDRESS); Spotter public spotter = Spotter(SPOTTER_ADDRESS); MCDSaverProxy public saverProxy; event Subscribed(address indexed owner, uint cdpId); event Unsubscribed(address indexed owner, uint cdpId); event Updated(address indexed owner, uint cdpId); event ParamUpdates(address indexed owner, uint cdpId, uint128, uint128, uint128, uint128, bool boostEnabled); /// @param _saverProxy Address of the MCDSaverProxy contract constructor(address _saverProxy) public { saverProxy = MCDSaverProxy(payable(_saverProxy)); minLimits[ETH_ILK] = 1700000000000000000; minLimits[BAT_ILK] = 1700000000000000000; } /// @dev Called by the DSProxy contract which owns the CDP /// @notice Adds the users CDP in the list of subscriptions so it can be monitored /// @param _cdpId Id of the CDP /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalBoost Ratio amount which boost should target /// @param _optimalRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled /// @param _nextPriceEnabled Boolean determing if we can use nextPrice for this cdp function subscribe(uint _cdpId, uint128 _minRatio, uint128 _maxRatio, uint128 _optimalBoost, uint128 _optimalRepay, bool _boostEnabled, bool _nextPriceEnabled) external { require(isOwner(msg.sender, _cdpId), "Must be called by Cdp owner"); // if boost is not enabled, set max ratio to max uint uint128 localMaxRatio = _boostEnabled ? _maxRatio : uint128(-1); require(checkParams(manager.ilks(_cdpId), _minRatio, localMaxRatio), "Must be correct params"); SubPosition storage subInfo = subscribersPos[_cdpId]; CdpHolder memory subscription = CdpHolder({ minRatio: _minRatio, maxRatio: localMaxRatio, optimalRatioBoost: _optimalBoost, optimalRatioRepay: _optimalRepay, owner: msg.sender, cdpId: _cdpId, boostEnabled: _boostEnabled, nextPriceEnabled: _nextPriceEnabled }); changeIndex++; if (subInfo.subscribed) { subscribers[subInfo.arrPos] = subscription; emit Updated(msg.sender, _cdpId); emit ParamUpdates(msg.sender, _cdpId, _minRatio, localMaxRatio, _optimalBoost, _optimalRepay, _boostEnabled); } else { subscribers.push(subscription); subInfo.arrPos = subscribers.length - 1; subInfo.subscribed = true; emit Subscribed(msg.sender, _cdpId); } } /// @notice Called by the users DSProxy /// @dev Owner who subscribed cancels his subscription function unsubscribe(uint _cdpId) external { require(isOwner(msg.sender, _cdpId), "Must be called by Cdp owner"); _unsubscribe(_cdpId); } /// @dev Checks if the _owner is the owner of the CDP function isOwner(address _owner, uint _cdpId) internal view returns (bool) { return getOwner(_cdpId) == _owner; } /// @dev Checks limit for minimum ratio and if minRatio is bigger than max function checkParams(bytes32 _ilk, uint128 _minRatio, uint128 _maxRatio) internal view returns (bool) { if (_minRatio < minLimits[_ilk]) { return false; } if (_minRatio > _maxRatio) { return false; } return true; } /// @dev Internal method to remove a subscriber from the list function _unsubscribe(uint _cdpId) internal { require(subscribers.length > 0, "Must have subscribers in the list"); SubPosition storage subInfo = subscribersPos[_cdpId]; require(subInfo.subscribed, "Must first be subscribed"); uint lastCdpId = subscribers[subscribers.length - 1].cdpId; SubPosition storage subInfo2 = subscribersPos[lastCdpId]; subInfo2.arrPos = subInfo.arrPos; subscribers[subInfo.arrPos] = subscribers[subscribers.length - 1]; subscribers.pop(); changeIndex++; subInfo.subscribed = false; subInfo.arrPos = 0; emit Unsubscribed(msg.sender, _cdpId); } /// @notice Returns an address that owns the CDP /// @param _cdpId Id of the CDP function getOwner(uint _cdpId) public view returns(address) { return manager.owns(_cdpId); } /// @notice Helper method for the front to get all the info about the subscribed CDP function getSubscribedInfo(uint _cdpId) public view returns(bool, uint128, uint128, uint128, uint128, address, uint coll, uint debt) { SubPosition memory subInfo = subscribersPos[_cdpId]; if (!subInfo.subscribed) return (false, 0, 0, 0, 0, address(0), 0, 0); (coll, debt) = saverProxy.getCdpInfo(manager, _cdpId, manager.ilks(_cdpId)); CdpHolder memory subscriber = subscribers[subInfo.arrPos]; return ( true, subscriber.minRatio, subscriber.maxRatio, subscriber.optimalRatioRepay, subscriber.optimalRatioBoost, subscriber.owner, coll, debt ); } function getCdpHolder(uint _cdpId) public view returns (bool subscribed, CdpHolder memory) { SubPosition memory subInfo = subscribersPos[_cdpId]; if (!subInfo.subscribed) return (false, CdpHolder(0, 0, 0, 0, address(0), 0, false, false)); CdpHolder memory subscriber = subscribers[subInfo.arrPos]; return (true, subscriber); } /// @notice Helper method for the front to get the information about the ilk of a CDP function getIlkInfo(bytes32 _ilk, uint _cdpId) public view returns(bytes32 ilk, uint art, uint rate, uint spot, uint line, uint dust, uint mat, uint par) { // send either ilk or cdpId if (_ilk == bytes32(0)) { _ilk = manager.ilks(_cdpId); } ilk = _ilk; (,mat) = spotter.ilks(_ilk); par = spotter.par(); (art, rate, spot, line, dust) = vat.ilks(_ilk); } /// @notice Helper method to return all the subscribed CDPs function getSubscribers() public view returns (CdpHolder[] memory) { return subscribers; } /// @notice Helper method to return all the subscribed CDPs function getSubscribersByPage(uint _page, uint _perPage) public view returns (CdpHolder[] memory) { CdpHolder[] memory holders = new CdpHolder[](_perPage); uint start = _page * _perPage; uint end = start + _perPage; uint count = 0; for (uint i=start; i<end; i++) { holders[count] = subscribers[i]; count++; } return holders; } ////////////// ADMIN METHODS /////////////////// /// @notice Admin function to change a min. limit for an asset function changeMinRatios(bytes32 _ilk, uint _newRatio) public onlyOwner { minLimits[_ilk] = _newRatio; } /// @notice Admin function to unsubscribe a CDP function unsubscribeByAdmin(uint _cdpId) public onlyOwner { SubPosition storage subInfo = subscribersPos[_cdpId]; if (subInfo.subscribed) { _unsubscribe(_cdpId); } } } contract BidProxy { address public constant DAI_JOIN = 0x9759A6Ac90977b93B58547b4A71c78317f391A28; address public constant VAT_ADDRESS = 0x35D1b3F3D7966A1DFe207aa4514C12a259A0492B; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; function daiBid(uint _bidId, uint _amount, address _flipper) public { uint tendAmount = _amount * (10 ** 27); joinDai(_amount); (, uint lot, , , , , , ) = Flipper(_flipper).bids(_bidId); Vat(VAT_ADDRESS).hope(_flipper); Flipper(_flipper).tend(_bidId, lot, tendAmount); } function collateralBid(uint _bidId, uint _amount, address _flipper) public { (uint bid, , , , , , , ) = Flipper(_flipper).bids(_bidId); joinDai(bid / (10**27)); Vat(VAT_ADDRESS).hope(_flipper); Flipper(_flipper).dent(_bidId, _amount, bid); } function closeBid(uint _bidId, address _flipper, address _joinAddr) public { bytes32 ilk = Join(_joinAddr).ilk(); Flipper(_flipper).deal(_bidId); uint amount = Vat(VAT_ADDRESS).gem(ilk, address(this)) / (10**27); Vat(VAT_ADDRESS).hope(_joinAddr); Gem(_joinAddr).exit(msg.sender, amount); } function exitCollateral(address _joinAddr) public { bytes32 ilk = Join(_joinAddr).ilk(); uint amount = Vat(VAT_ADDRESS).gem(ilk, address(this)) / (10**27); Vat(VAT_ADDRESS).hope(_joinAddr); Gem(_joinAddr).exit(msg.sender, amount); } function exitDai() public { uint amount = Vat(VAT_ADDRESS).dai(address(this)) / (10**27); Vat(VAT_ADDRESS).hope(DAI_JOIN); Gem(DAI_JOIN).exit(msg.sender, amount); } function withdrawToken(address _token) public { uint balance = ERC20(_token).balanceOf(address(this)); ERC20(_token).transfer(msg.sender, balance); } function withdrawEth() public { uint balance = address(this).balance; msg.sender.transfer(balance); } function joinDai(uint _amount) internal { uint amountInVat = Vat(VAT_ADDRESS).dai(address(this)) / (10**27); if (_amount > amountInVat) { uint amountDiff = (_amount - amountInVat) + 1; ERC20(DAI_ADDRESS).transferFrom(msg.sender, address(this), amountDiff); ERC20(DAI_ADDRESS).approve(DAI_JOIN, amountDiff); Join(DAI_JOIN).join(address(this), amountDiff); } } } abstract contract IMCDSubscriptions { function unsubscribe(uint256 _cdpId) external virtual ; function subscribersPos(uint256 _cdpId) external virtual returns (uint256, bool); } abstract contract GemLike { function approve(address, uint256) public virtual; function transfer(address, uint256) public virtual; function transferFrom(address, address, uint256) public virtual; function deposit() public virtual payable; function withdraw(uint256) public virtual; } abstract contract ManagerLike { function cdpCan(address, uint256, address) public virtual view returns (uint256); function ilks(uint256) public virtual view returns (bytes32); function owns(uint256) public virtual view returns (address); function urns(uint256) public virtual view returns (address); function vat() public virtual view returns (address); function open(bytes32, address) public virtual returns (uint256); function give(uint256, address) public virtual; function cdpAllow(uint256, address, uint256) public virtual; function urnAllow(address, uint256) public virtual; function frob(uint256, int256, int256) public virtual; function flux(uint256, address, uint256) public virtual; function move(uint256, address, uint256) public virtual; function exit(address, uint256, address, uint256) public virtual; function quit(uint256, address) public virtual; function enter(address, uint256) public virtual; function shift(uint256, uint256) public virtual; } abstract contract VatLike { function can(address, address) public virtual view returns (uint256); function ilks(bytes32) public virtual view returns (uint256, uint256, uint256, uint256, uint256); function dai(address) public virtual view returns (uint256); function urns(bytes32, address) public virtual view returns (uint256, uint256); function frob(bytes32, address, address, address, int256, int256) public virtual; function hope(address) public virtual; function move(address, address, uint256) public virtual; } abstract contract GemJoinLike { function dec() public virtual returns (uint256); function gem() public virtual returns (GemLike); function join(address, uint256) public virtual payable; function exit(address, uint256) public virtual; } abstract contract GNTJoinLike { function bags(address) public virtual view returns (address); function make(address) public virtual returns (address); } abstract contract DaiJoinLike { function vat() public virtual returns (VatLike); function dai() public virtual returns (GemLike); function join(address, uint256) public virtual payable; function exit(address, uint256) public virtual; } abstract contract HopeLike { function hope(address) public virtual; function nope(address) public virtual; } abstract contract ProxyRegistryInterface { function build(address) public virtual returns (address); } abstract contract EndLike { function fix(bytes32) public virtual view returns (uint256); function cash(bytes32, uint256) public virtual; function free(bytes32) public virtual; function pack(uint256) public virtual; function skim(bytes32, address) public virtual; } abstract contract JugLike { function drip(bytes32) public virtual returns (uint256); } abstract contract PotLike { function pie(address) public virtual view returns (uint256); function drip() public virtual returns (uint256); function join(uint256) public virtual; function exit(uint256) public virtual; } abstract contract ProxyRegistryLike { function proxies(address) public virtual view returns (address); function build(address) public virtual returns (address); } abstract contract ProxyLike { function owner() public virtual view returns (address); } contract Common { uint256 constant RAY = 10**27; // Internal functions function mul(uint256 x, uint256 y) internal pure returns (uint256 z) { require(y == 0 || (z = x * y) / y == x, "mul-overflow"); } // Public functions // solhint-disable-next-line func-name-mixedcase function daiJoin_join(address apt, address urn, uint256 wad) public { // Gets DAI from the user's wallet DaiJoinLike(apt).dai().transferFrom(msg.sender, address(this), wad); // Approves adapter to take the DAI amount DaiJoinLike(apt).dai().approve(apt, wad); // Joins DAI into the vat DaiJoinLike(apt).join(urn, wad); } } contract MCDCreateProxyActions is Common { // Internal functions function sub(uint256 x, uint256 y) internal pure returns (uint256 z) { require((z = x - y) <= x, "sub-overflow"); } function toInt(uint256 x) internal pure returns (int256 y) { y = int256(x); require(y >= 0, "int-overflow"); } function toRad(uint256 wad) internal pure returns (uint256 rad) { rad = mul(wad, 10**27); } function convertTo18(address gemJoin, uint256 amt) internal returns (uint256 wad) { // For those collaterals that have less than 18 decimals precision we need to do the conversion before passing to frob function // Adapters will automatically handle the difference of precision wad = mul(amt, 10**(18 - GemJoinLike(gemJoin).dec())); } function _getDrawDart(address vat, address jug, address urn, bytes32 ilk, uint256 wad) internal returns (int256 dart) { // Updates stability fee rate uint256 rate = JugLike(jug).drip(ilk); // Gets DAI balance of the urn in the vat uint256 dai = VatLike(vat).dai(urn); // If there was already enough DAI in the vat balance, just exits it without adding more debt if (dai < mul(wad, RAY)) { // Calculates the needed dart so together with the existing dai in the vat is enough to exit wad amount of DAI tokens dart = toInt(sub(mul(wad, RAY), dai) / rate); // This is neeeded due lack of precision. It might need to sum an extra dart wei (for the given DAI wad amount) dart = mul(uint256(dart), rate) < mul(wad, RAY) ? dart + 1 : dart; } } function _getWipeDart(address vat, uint256 dai, address urn, bytes32 ilk) internal view returns (int256 dart) { // Gets actual rate from the vat (, uint256 rate, , , ) = VatLike(vat).ilks(ilk); // Gets actual art value of the urn (, uint256 art) = VatLike(vat).urns(ilk, urn); // Uses the whole dai balance in the vat to reduce the debt dart = toInt(dai / rate); // Checks the calculated dart is not higher than urn.art (total debt), otherwise uses its value dart = uint256(dart) <= art ? -dart : -toInt(art); } function _getWipeAllWad(address vat, address usr, address urn, bytes32 ilk) internal view returns (uint256 wad) { // Gets actual rate from the vat (, uint256 rate, , , ) = VatLike(vat).ilks(ilk); // Gets actual art value of the urn (, uint256 art) = VatLike(vat).urns(ilk, urn); // Gets actual dai amount in the urn uint256 dai = VatLike(vat).dai(usr); uint256 rad = sub(mul(art, rate), dai); wad = rad / RAY; // If the rad precision has some dust, it will need to request for 1 extra wad wei wad = mul(wad, RAY) < rad ? wad + 1 : wad; } // Public functions function transfer(address gem, address dst, uint256 wad) public { GemLike(gem).transfer(dst, wad); } // solhint-disable-next-line func-name-mixedcase function ethJoin_join(address apt, address urn) public payable { // Wraps ETH in WETH GemJoinLike(apt).gem().deposit{value: msg.value}(); // Approves adapter to take the WETH amount GemJoinLike(apt).gem().approve(address(apt), msg.value); // Joins WETH collateral into the vat GemJoinLike(apt).join(urn, msg.value); } // solhint-disable-next-line func-name-mixedcase function gemJoin_join(address apt, address urn, uint256 wad, bool transferFrom) public { // Only executes for tokens that have approval/transferFrom implementation if (transferFrom) { // Gets token from the user's wallet GemJoinLike(apt).gem().transferFrom(msg.sender, address(this), wad); // Approves adapter to take the token amount GemJoinLike(apt).gem().approve(apt, 0); GemJoinLike(apt).gem().approve(apt, wad); } // Joins token collateral into the vat GemJoinLike(apt).join(urn, wad); } function hope(address obj, address usr) public { HopeLike(obj).hope(usr); } function nope(address obj, address usr) public { HopeLike(obj).nope(usr); } function open(address manager, bytes32 ilk, address usr) public returns (uint256 cdp) { cdp = ManagerLike(manager).open(ilk, usr); } function give(address manager, uint256 cdp, address usr) public { ManagerLike(manager).give(cdp, usr); } function move(address manager, uint256 cdp, address dst, uint256 rad) public { ManagerLike(manager).move(cdp, dst, rad); } function frob(address manager, uint256 cdp, int256 dink, int256 dart) public { ManagerLike(manager).frob(cdp, dink, dart); } function lockETH(address manager, address ethJoin, uint256 cdp) public payable { // Receives ETH amount, converts it to WETH and joins it into the vat ethJoin_join(ethJoin, address(this)); // Locks WETH amount into the CDP VatLike(ManagerLike(manager).vat()).frob( ManagerLike(manager).ilks(cdp), ManagerLike(manager).urns(cdp), address(this), address(this), toInt(msg.value), 0 ); } function lockGem(address manager, address gemJoin, uint256 cdp, uint256 wad, bool transferFrom) public { // Takes token amount from user's wallet and joins into the vat gemJoin_join(gemJoin, address(this), wad, transferFrom); // Locks token amount into the CDP VatLike(ManagerLike(manager).vat()).frob( ManagerLike(manager).ilks(cdp), ManagerLike(manager).urns(cdp), address(this), address(this), toInt(convertTo18(gemJoin, wad)), 0 ); } function draw(address manager, address jug, address daiJoin, uint256 cdp, uint256 wad) public { address urn = ManagerLike(manager).urns(cdp); address vat = ManagerLike(manager).vat(); bytes32 ilk = ManagerLike(manager).ilks(cdp); // Generates debt in the CDP frob(manager, cdp, 0, _getDrawDart(vat, jug, urn, ilk, wad)); // Moves the DAI amount (balance in the vat in rad) to proxy's address move(manager, cdp, address(this), toRad(wad)); // Allows adapter to access to proxy's DAI balance in the vat if (VatLike(vat).can(address(this), address(daiJoin)) == 0) { VatLike(vat).hope(daiJoin); } // Exits DAI to the user's wallet as a token DaiJoinLike(daiJoin).exit(msg.sender, wad); } function lockETHAndDraw( address manager, address jug, address ethJoin, address daiJoin, uint256 cdp, uint256 wadD ) public payable { address urn = ManagerLike(manager).urns(cdp); address vat = ManagerLike(manager).vat(); bytes32 ilk = ManagerLike(manager).ilks(cdp); // Receives ETH amount, converts it to WETH and joins it into the vat ethJoin_join(ethJoin, urn); // Locks WETH amount into the CDP and generates debt frob(manager, cdp, toInt(msg.value), _getDrawDart(vat, jug, urn, ilk, wadD)); // Moves the DAI amount (balance in the vat in rad) to proxy's address move(manager, cdp, address(this), toRad(wadD)); // Allows adapter to access to proxy's DAI balance in the vat if (VatLike(vat).can(address(this), address(daiJoin)) == 0) { VatLike(vat).hope(daiJoin); } // Exits DAI to the user's wallet as a token DaiJoinLike(daiJoin).exit(msg.sender, wadD); } function openLockETHAndDraw( address manager, address jug, address ethJoin, address daiJoin, bytes32 ilk, uint256 wadD, address owner ) public payable returns (uint256 cdp) { cdp = open(manager, ilk, address(this)); lockETHAndDraw(manager, jug, ethJoin, daiJoin, cdp, wadD); give(manager, cdp, owner); } function lockGemAndDraw( address manager, address jug, address gemJoin, address daiJoin, uint256 cdp, uint256 wadC, uint256 wadD, bool transferFrom ) public { address urn = ManagerLike(manager).urns(cdp); address vat = ManagerLike(manager).vat(); bytes32 ilk = ManagerLike(manager).ilks(cdp); // Takes token amount from user's wallet and joins into the vat gemJoin_join(gemJoin, urn, wadC, transferFrom); // Locks token amount into the CDP and generates debt frob( manager, cdp, toInt(convertTo18(gemJoin, wadC)), _getDrawDart(vat, jug, urn, ilk, wadD) ); // Moves the DAI amount (balance in the vat in rad) to proxy's address move(manager, cdp, address(this), toRad(wadD)); // Allows adapter to access to proxy's DAI balance in the vat if (VatLike(vat).can(address(this), address(daiJoin)) == 0) { VatLike(vat).hope(daiJoin); } // Exits DAI to the user's wallet as a token DaiJoinLike(daiJoin).exit(msg.sender, wadD); } function openLockGemAndDraw( address manager, address jug, address gemJoin, address daiJoin, bytes32 ilk, uint256 wadC, uint256 wadD, bool transferFrom, address owner ) public returns (uint256 cdp) { cdp = open(manager, ilk, address(this)); lockGemAndDraw(manager, jug, gemJoin, daiJoin, cdp, wadC, wadD, transferFrom); give(manager, cdp, owner); } } contract MCDCreateTaker { using SafeERC20 for ERC20; address payable public constant MCD_CREATE_FLASH_LOAN = 0x71eC9a4fCE561c3936a511D9ebb05B60CF2bA519; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; address public constant ETH_JOIN_ADDRESS = 0x2F0b23f53734252Bda2277357e97e1517d6B042A; ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); // solhint-disable-next-line const-name-snakecase Manager public constant manager = Manager(0x5ef30b9986345249bc32d8928B7ee64DE9435E39); // solhint-disable-next-line const-name-snakecase DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); struct CreateData { uint collAmount; uint daiAmount; address joinAddr; } function openWithLoan( SaverExchangeCore.ExchangeData memory _exchangeData, CreateData memory _createData ) public payable { MCD_CREATE_FLASH_LOAN.transfer(msg.value); //0x fee if (_createData.joinAddr != ETH_JOIN_ADDRESS) { ERC20(getCollateralAddr(_createData.joinAddr)).safeTransferFrom(msg.sender, address(this), _createData.collAmount); ERC20(getCollateralAddr(_createData.joinAddr)).safeTransfer(MCD_CREATE_FLASH_LOAN, _createData.collAmount); } (uint[6] memory numData, address[5] memory addrData, bytes memory callData) = _packData(_createData, _exchangeData); bytes memory paramsData = abi.encode(numData, addrData, callData, address(this)); lendingPool.flashLoan(MCD_CREATE_FLASH_LOAN, DAI_ADDRESS, _createData.daiAmount, paramsData); logger.Log(address(this), msg.sender, "MCDCreate", abi.encode(manager.last(address(this)), _createData.collAmount, _createData.daiAmount)); } function getCollateralAddr(address _joinAddr) internal view returns (address) { return address(Join(_joinAddr).gem()); } function _packData( CreateData memory _createData, SaverExchangeCore.ExchangeData memory exchangeData ) internal pure returns (uint[6] memory numData, address[5] memory addrData, bytes memory callData) { numData = [ _createData.collAmount, _createData.daiAmount, exchangeData.srcAmount, exchangeData.destAmount, exchangeData.minPrice, exchangeData.price0x ]; addrData = [ exchangeData.srcAddr, exchangeData.destAddr, exchangeData.exchangeAddr, exchangeData.wrapper, _createData.joinAddr ]; callData = exchangeData.callData; } } abstract contract GemLike { function approve(address, uint) virtual public; function transfer(address, uint) virtual public; function transferFrom(address, address, uint) virtual public; function deposit() virtual public payable; function withdraw(uint) virtual public; } abstract contract ManagerLike { function cdpCan(address, uint, address) virtual public view returns (uint); function ilks(uint) virtual public view returns (bytes32); function owns(uint) virtual public view returns (address); function urns(uint) virtual public view returns (address); function vat() virtual public view returns (address); function open(bytes32, address) virtual public returns (uint); function give(uint, address) virtual public; function cdpAllow(uint, address, uint) virtual public; function urnAllow(address, uint) virtual public; function frob(uint, int, int) virtual public; function flux(uint, address, uint) virtual public; function move(uint, address, uint) virtual public; function exit(address, uint, address, uint) virtual public; function quit(uint, address) virtual public; function enter(address, uint) virtual public; function shift(uint, uint) virtual public; } abstract contract VatLike { function can(address, address) virtual public view returns (uint); function ilks(bytes32) virtual public view returns (uint, uint, uint, uint, uint); function dai(address) virtual public view returns (uint); function urns(bytes32, address) virtual public view returns (uint, uint); function frob(bytes32, address, address, address, int, int) virtual public; function hope(address) virtual public; function move(address, address, uint) virtual public; } abstract contract GemJoinLike { function dec() virtual public returns (uint); function gem() virtual public returns (GemLike); function join(address, uint) virtual public payable; function exit(address, uint) virtual public; } abstract contract GNTJoinLike { function bags(address) virtual public view returns (address); function make(address) virtual public returns (address); } abstract contract DaiJoinLike { function vat() virtual public returns (VatLike); function dai() virtual public returns (GemLike); function join(address, uint) virtual public payable; function exit(address, uint) virtual public; } abstract contract HopeLike { function hope(address) virtual public; function nope(address) virtual public; } abstract contract ProxyRegistryInterface { function proxies(address _owner) virtual public view returns (address); function build(address) virtual public returns (address); } abstract contract EndLike { function fix(bytes32) virtual public view returns (uint); function cash(bytes32, uint) virtual public; function free(bytes32) virtual public; function pack(uint) virtual public; function skim(bytes32, address) virtual public; } abstract contract JugLike { function drip(bytes32) virtual public returns (uint); } abstract contract PotLike { function pie(address) virtual public view returns (uint); function drip() virtual public returns (uint); function join(uint) virtual public; function exit(uint) virtual public; } abstract contract ProxyRegistryLike { function proxies(address) virtual public view returns (address); function build(address) virtual public returns (address); } abstract contract ProxyLike { function owner() virtual public view returns (address); } abstract contract DSProxy { function execute(address _target, bytes memory _data) virtual public payable returns (bytes32); function setOwner(address owner_) virtual public; } contract Common { uint256 constant RAY = 10 ** 27; // Internal functions function mul(uint x, uint y) internal pure returns (uint z) { require(y == 0 || (z = x * y) / y == x, "mul-overflow"); } // Public functions function daiJoin_join(address apt, address urn, uint wad) public { // Gets DAI from the user's wallet DaiJoinLike(apt).dai().transferFrom(msg.sender, address(this), wad); // Approves adapter to take the DAI amount DaiJoinLike(apt).dai().approve(apt, wad); // Joins DAI into the vat DaiJoinLike(apt).join(urn, wad); } } contract SaverProxyActions is Common { event CDPAction(string indexed, uint indexed, uint, uint); // Internal functions function sub(uint x, uint y) internal pure returns (uint z) { require((z = x - y) <= x, "sub-overflow"); } function toInt(uint x) internal pure returns (int y) { y = int(x); require(y >= 0, "int-overflow"); } function toRad(uint wad) internal pure returns (uint rad) { rad = mul(wad, 10 ** 27); } function convertTo18(address gemJoin, uint256 amt) internal returns (uint256 wad) { // For those collaterals that have less than 18 decimals precision we need to do the conversion before passing to frob function // Adapters will automatically handle the difference of precision wad = mul( amt, 10 ** (18 - GemJoinLike(gemJoin).dec()) ); } function _getDrawDart( address vat, address jug, address urn, bytes32 ilk, uint wad ) internal returns (int dart) { // Updates stability fee rate uint rate = JugLike(jug).drip(ilk); // Gets DAI balance of the urn in the vat uint dai = VatLike(vat).dai(urn); // If there was already enough DAI in the vat balance, just exits it without adding more debt if (dai < mul(wad, RAY)) { // Calculates the needed dart so together with the existing dai in the vat is enough to exit wad amount of DAI tokens dart = toInt(sub(mul(wad, RAY), dai) / rate); // This is neeeded due lack of precision. It might need to sum an extra dart wei (for the given DAI wad amount) dart = mul(uint(dart), rate) < mul(wad, RAY) ? dart + 1 : dart; } } function _getWipeDart( address vat, uint dai, address urn, bytes32 ilk ) internal view returns (int dart) { // Gets actual rate from the vat (, uint rate,,,) = VatLike(vat).ilks(ilk); // Gets actual art value of the urn (, uint art) = VatLike(vat).urns(ilk, urn); // Uses the whole dai balance in the vat to reduce the debt dart = toInt(dai / rate); // Checks the calculated dart is not higher than urn.art (total debt), otherwise uses its value dart = uint(dart) <= art ? - dart : - toInt(art); } function _getWipeAllWad( address vat, address usr, address urn, bytes32 ilk ) internal view returns (uint wad) { // Gets actual rate from the vat (, uint rate,,,) = VatLike(vat).ilks(ilk); // Gets actual art value of the urn (, uint art) = VatLike(vat).urns(ilk, urn); // Gets actual dai amount in the urn uint dai = VatLike(vat).dai(usr); uint rad = sub(mul(art, rate), dai); wad = rad / RAY; // If the rad precision has some dust, it will need to request for 1 extra wad wei wad = mul(wad, RAY) < rad ? wad + 1 : wad; } // Public functions function transfer(address gem, address dst, uint wad) public { GemLike(gem).transfer(dst, wad); } function ethJoin_join(address apt, address urn) public payable { // Wraps ETH in WETH GemJoinLike(apt).gem().deposit{value: msg.value}(); // Approves adapter to take the WETH amount GemJoinLike(apt).gem().approve(address(apt), msg.value); // Joins WETH collateral into the vat GemJoinLike(apt).join(urn, msg.value); } function gemJoin_join(address apt, address urn, uint wad, bool transferFrom) public { // Only executes for tokens that have approval/transferFrom implementation if (transferFrom) { // Gets token from the user's wallet GemJoinLike(apt).gem().transferFrom(msg.sender, address(this), wad); // Approves adapter to take the token amount GemJoinLike(apt).gem().approve(apt, 0); GemJoinLike(apt).gem().approve(apt, wad); } // Joins token collateral into the vat GemJoinLike(apt).join(urn, wad); } function hope( address obj, address usr ) public { HopeLike(obj).hope(usr); } function nope( address obj, address usr ) public { HopeLike(obj).nope(usr); } function open( address manager, bytes32 ilk, address usr ) public returns (uint cdp) { cdp = ManagerLike(manager).open(ilk, usr); } function give( address manager, uint cdp, address usr ) public { ManagerLike(manager).give(cdp, usr); emit CDPAction('give', cdp, 0, 0); } function giveToProxy( address proxyRegistry, address manager, uint cdp, address dst ) public { // Gets actual proxy address address proxy = ProxyRegistryLike(proxyRegistry).proxies(dst); // Checks if the proxy address already existed and dst address is still the owner if (proxy == address(0) || ProxyLike(proxy).owner() != dst) { uint csize; assembly { csize := extcodesize(dst) } // We want to avoid creating a proxy for a contract address that might not be able to handle proxies, then losing the CDP require(csize == 0, "Dst-is-a-contract"); // Creates the proxy for the dst address proxy = ProxyRegistryLike(proxyRegistry).build(dst); } // Transfers CDP to the dst proxy give(manager, cdp, proxy); } function cdpAllow( address manager, uint cdp, address usr, uint ok ) public { ManagerLike(manager).cdpAllow(cdp, usr, ok); } function urnAllow( address manager, address usr, uint ok ) public { ManagerLike(manager).urnAllow(usr, ok); } function flux( address manager, uint cdp, address dst, uint wad ) public { ManagerLike(manager).flux(cdp, dst, wad); } function move( address manager, uint cdp, address dst, uint rad ) public { ManagerLike(manager).move(cdp, dst, rad); } function frob( address manager, uint cdp, int dink, int dart ) public { ManagerLike(manager).frob(cdp, dink, dart); } function quit( address manager, uint cdp, address dst ) public { ManagerLike(manager).quit(cdp, dst); } function enter( address manager, address src, uint cdp ) public { ManagerLike(manager).enter(src, cdp); } function shift( address manager, uint cdpSrc, uint cdpOrg ) public { ManagerLike(manager).shift(cdpSrc, cdpOrg); } function makeGemBag( address gemJoin ) public returns (address bag) { bag = GNTJoinLike(gemJoin).make(address(this)); } function lockETH( address manager, address ethJoin, uint cdp ) public payable { // Receives ETH amount, converts it to WETH and joins it into the vat ethJoin_join(ethJoin, address(this)); // Locks WETH amount into the CDP VatLike(ManagerLike(manager).vat()).frob( ManagerLike(manager).ilks(cdp), ManagerLike(manager).urns(cdp), address(this), address(this), toInt(msg.value), 0 ); emit CDPAction('lockETH', cdp, msg.value, 0); } function lockGem( address manager, address gemJoin, uint cdp, uint wad, bool transferFrom ) public { // Takes token amount from user's wallet and joins into the vat gemJoin_join(gemJoin, address(this), wad, transferFrom); // Locks token amount into the CDP VatLike(ManagerLike(manager).vat()).frob( ManagerLike(manager).ilks(cdp), ManagerLike(manager).urns(cdp), address(this), address(this), toInt(convertTo18(gemJoin, wad)), 0 ); emit CDPAction('lockGem', cdp, wad, 0); } function freeETH( address manager, address ethJoin, uint cdp, uint wad ) public { // Unlocks WETH amount from the CDP frob(manager, cdp, -toInt(wad), 0); // Moves the amount from the CDP urn to proxy's address flux(manager, cdp, address(this), wad); // Exits WETH amount to proxy address as a token GemJoinLike(ethJoin).exit(address(this), wad); // Converts WETH to ETH GemJoinLike(ethJoin).gem().withdraw(wad); // Sends ETH back to the user's wallet msg.sender.transfer(wad); emit CDPAction('freeETH', cdp, wad, 0); } function freeGem( address manager, address gemJoin, uint cdp, uint wad ) public { uint wad18 = convertTo18(gemJoin, wad); // Unlocks token amount from the CDP frob(manager, cdp, -toInt(wad18), 0); // Moves the amount from the CDP urn to proxy's address flux(manager, cdp, address(this), wad18); // Exits token amount to the user's wallet as a token GemJoinLike(gemJoin).exit(msg.sender, wad); emit CDPAction('freeGem', cdp, wad, 0); } function exitETH( address manager, address ethJoin, uint cdp, uint wad ) public { // Moves the amount from the CDP urn to proxy's address flux(manager, cdp, address(this), wad); // Exits WETH amount to proxy address as a token GemJoinLike(ethJoin).exit(address(this), wad); // Converts WETH to ETH GemJoinLike(ethJoin).gem().withdraw(wad); // Sends ETH back to the user's wallet msg.sender.transfer(wad); } function exitGem( address manager, address gemJoin, uint cdp, uint wad ) public { // Moves the amount from the CDP urn to proxy's address flux(manager, cdp, address(this), convertTo18(gemJoin, wad)); // Exits token amount to the user's wallet as a token GemJoinLike(gemJoin).exit(msg.sender, wad); } function draw( address manager, address jug, address daiJoin, uint cdp, uint wad ) public { address urn = ManagerLike(manager).urns(cdp); address vat = ManagerLike(manager).vat(); bytes32 ilk = ManagerLike(manager).ilks(cdp); // Generates debt in the CDP frob(manager, cdp, 0, _getDrawDart(vat, jug, urn, ilk, wad)); // Moves the DAI amount (balance in the vat in rad) to proxy's address move(manager, cdp, address(this), toRad(wad)); // Allows adapter to access to proxy's DAI balance in the vat if (VatLike(vat).can(address(this), address(daiJoin)) == 0) { VatLike(vat).hope(daiJoin); } // Exits DAI to the user's wallet as a token DaiJoinLike(daiJoin).exit(msg.sender, wad); emit CDPAction('draw', cdp, 0, wad); } function wipe( address manager, address daiJoin, uint cdp, uint wad ) public { address vat = ManagerLike(manager).vat(); address urn = ManagerLike(manager).urns(cdp); bytes32 ilk = ManagerLike(manager).ilks(cdp); address own = ManagerLike(manager).owns(cdp); if (own == address(this) || ManagerLike(manager).cdpCan(own, cdp, address(this)) == 1) { // Joins DAI amount into the vat daiJoin_join(daiJoin, urn, wad); // Paybacks debt to the CDP frob(manager, cdp, 0, _getWipeDart(vat, VatLike(vat).dai(urn), urn, ilk)); } else { // Joins DAI amount into the vat daiJoin_join(daiJoin, address(this), wad); // Paybacks debt to the CDP VatLike(vat).frob( ilk, urn, address(this), address(this), 0, _getWipeDart(vat, wad * RAY, urn, ilk) ); } emit CDPAction('wipe', cdp, 0, wad); } function wipeAll( address manager, address daiJoin, uint cdp ) public { address vat = ManagerLike(manager).vat(); address urn = ManagerLike(manager).urns(cdp); bytes32 ilk = ManagerLike(manager).ilks(cdp); (, uint art) = VatLike(vat).urns(ilk, urn); address own = ManagerLike(manager).owns(cdp); if (own == address(this) || ManagerLike(manager).cdpCan(own, cdp, address(this)) == 1) { // Joins DAI amount into the vat daiJoin_join(daiJoin, urn, _getWipeAllWad(vat, urn, urn, ilk)); // Paybacks debt to the CDP frob(manager, cdp, 0, -int(art)); } else { // Joins DAI amount into the vat daiJoin_join(daiJoin, address(this), _getWipeAllWad(vat, address(this), urn, ilk)); // Paybacks debt to the CDP VatLike(vat).frob( ilk, urn, address(this), address(this), 0, -int(art) ); } emit CDPAction('wipeAll', cdp, 0, art); } function lockETHAndDraw( address manager, address jug, address ethJoin, address daiJoin, uint cdp, uint wadD ) public payable { address urn = ManagerLike(manager).urns(cdp); address vat = ManagerLike(manager).vat(); bytes32 ilk = ManagerLike(manager).ilks(cdp); // Receives ETH amount, converts it to WETH and joins it into the vat ethJoin_join(ethJoin, urn); // Locks WETH amount into the CDP and generates debt frob(manager, cdp, toInt(msg.value), _getDrawDart(vat, jug, urn, ilk, wadD)); // Moves the DAI amount (balance in the vat in rad) to proxy's address move(manager, cdp, address(this), toRad(wadD)); // Allows adapter to access to proxy's DAI balance in the vat if (VatLike(vat).can(address(this), address(daiJoin)) == 0) { VatLike(vat).hope(daiJoin); } // Exits DAI to the user's wallet as a token DaiJoinLike(daiJoin).exit(msg.sender, wadD); } function openLockETHAndDraw( address manager, address jug, address ethJoin, address daiJoin, bytes32 ilk, uint wadD ) public payable returns (uint cdp) { cdp = open(manager, ilk, address(this)); lockETHAndDraw(manager, jug, ethJoin, daiJoin, cdp, wadD); emit CDPAction('openLockETHAndDraw', cdp, msg.value, wadD); } function lockGemAndDraw( address manager, address jug, address gemJoin, address daiJoin, uint cdp, uint wadC, uint wadD, bool transferFrom ) public { address urn = ManagerLike(manager).urns(cdp); address vat = ManagerLike(manager).vat(); bytes32 ilk = ManagerLike(manager).ilks(cdp); // Takes token amount from user's wallet and joins into the vat gemJoin_join(gemJoin, urn, wadC, transferFrom); // Locks token amount into the CDP and generates debt frob(manager, cdp, toInt(convertTo18(gemJoin, wadC)), _getDrawDart(vat, jug, urn, ilk, wadD)); // Moves the DAI amount (balance in the vat in rad) to proxy's address move(manager, cdp, address(this), toRad(wadD)); // Allows adapter to access to proxy's DAI balance in the vat if (VatLike(vat).can(address(this), address(daiJoin)) == 0) { VatLike(vat).hope(daiJoin); } // Exits DAI to the user's wallet as a token DaiJoinLike(daiJoin).exit(msg.sender, wadD); } function openLockGemAndDraw( address manager, address jug, address gemJoin, address daiJoin, bytes32 ilk, uint wadC, uint wadD, bool transferFrom ) public returns (uint cdp) { cdp = open(manager, ilk, address(this)); lockGemAndDraw(manager, jug, gemJoin, daiJoin, cdp, wadC, wadD, transferFrom); emit CDPAction('openLockGemAndDraw', cdp, wadC, wadD); } function wipeAllAndFreeETH( address manager, address ethJoin, address daiJoin, uint cdp, uint wadC ) public { address vat = ManagerLike(manager).vat(); address urn = ManagerLike(manager).urns(cdp); bytes32 ilk = ManagerLike(manager).ilks(cdp); (, uint art) = VatLike(vat).urns(ilk, urn); // Joins DAI amount into the vat daiJoin_join(daiJoin, urn, _getWipeAllWad(vat, urn, urn, ilk)); // Paybacks debt to the CDP and unlocks WETH amount from it frob( manager, cdp, -toInt(wadC), -int(art) ); // Moves the amount from the CDP urn to proxy's address flux(manager, cdp, address(this), wadC); // Exits WETH amount to proxy address as a token GemJoinLike(ethJoin).exit(address(this), wadC); // Converts WETH to ETH GemJoinLike(ethJoin).gem().withdraw(wadC); // Sends ETH back to the user's wallet msg.sender.transfer(wadC); emit CDPAction('wipeAllAndFreeETH', cdp, wadC, art); } function wipeAndFreeGem( address manager, address gemJoin, address daiJoin, uint cdp, uint wadC, uint wadD ) public { address urn = ManagerLike(manager).urns(cdp); // Joins DAI amount into the vat daiJoin_join(daiJoin, urn, wadD); uint wad18 = convertTo18(gemJoin, wadC); // Paybacks debt to the CDP and unlocks token amount from it frob( manager, cdp, -toInt(wad18), _getWipeDart(ManagerLike(manager).vat(), VatLike(ManagerLike(manager).vat()).dai(urn), urn, ManagerLike(manager).ilks(cdp)) ); // Moves the amount from the CDP urn to proxy's address flux(manager, cdp, address(this), wad18); // Exits token amount to the user's wallet as a token GemJoinLike(gemJoin).exit(msg.sender, wadC); } function wipeAllAndFreeGem( address manager, address gemJoin, address daiJoin, uint cdp, uint wadC ) public { address vat = ManagerLike(manager).vat(); address urn = ManagerLike(manager).urns(cdp); bytes32 ilk = ManagerLike(manager).ilks(cdp); (, uint art) = VatLike(vat).urns(ilk, urn); // Joins DAI amount into the vat daiJoin_join(daiJoin, urn, _getWipeAllWad(vat, urn, urn, ilk)); uint wad18 = convertTo18(gemJoin, wadC); // Paybacks debt to the CDP and unlocks token amount from it frob( manager, cdp, -toInt(wad18), -int(art) ); // Moves the amount from the CDP urn to proxy's address flux(manager, cdp, address(this), wad18); // Exits token amount to the user's wallet as a token GemJoinLike(gemJoin).exit(msg.sender, wadC); emit CDPAction('wipeAllAndFreeGem', cdp, wadC, art); } function createProxyAndCDP( address manager, address jug, address ethJoin, address daiJoin, bytes32 ilk, uint wadD, address registry ) public payable returns(uint) { address proxy = ProxyRegistryInterface(registry).build(msg.sender); uint cdp = openLockETHAndDraw(manager, jug, ethJoin, daiJoin, ilk, wadD ); give(manager, cdp, address(proxy)); return cdp; } function createProxyAndGemCDP( address manager, address jug, address gemJoin, address daiJoin, bytes32 ilk, uint wadC, uint wadD, bool transferFrom, address registry ) public returns(uint) { address proxy = ProxyRegistryInterface(registry).build(msg.sender); uint cdp = openLockGemAndDraw(manager, jug, gemJoin, daiJoin, ilk, wadC, wadD, transferFrom); give(manager, cdp, address(proxy)); return cdp; } } contract MCDSaverProxyHelper is DSMath { /// @notice Returns a normalized debt _amount based on the current rate /// @param _amount Amount of dai to be normalized /// @param _rate Current rate of the stability fee /// @param _daiVatBalance Balance od Dai in the Vat for that CDP function normalizeDrawAmount(uint _amount, uint _rate, uint _daiVatBalance) internal pure returns (int dart) { if (_daiVatBalance < mul(_amount, RAY)) { dart = toPositiveInt(sub(mul(_amount, RAY), _daiVatBalance) / _rate); dart = mul(uint(dart), _rate) < mul(_amount, RAY) ? dart + 1 : dart; } } /// @notice Converts a number to Rad percision /// @param _wad The input number in wad percision function toRad(uint _wad) internal pure returns (uint) { return mul(_wad, 10 ** 27); } /// @notice Converts a number to 18 decimal percision /// @param _joinAddr Join address of the collateral /// @param _amount Number to be converted function convertTo18(address _joinAddr, uint256 _amount) internal view returns (uint256) { return mul(_amount, 10 ** (18 - Join(_joinAddr).dec())); } /// @notice Converts a uint to int and checks if positive /// @param _x Number to be converted function toPositiveInt(uint _x) internal pure returns (int y) { y = int(_x); require(y >= 0, "int-overflow"); } /// @notice Gets Dai amount in Vat which can be added to Cdp /// @param _vat Address of Vat contract /// @param _urn Urn of the Cdp /// @param _ilk Ilk of the Cdp function normalizePaybackAmount(address _vat, address _urn, bytes32 _ilk) internal view returns (int amount) { uint dai = Vat(_vat).dai(_urn); (, uint rate,,,) = Vat(_vat).ilks(_ilk); (, uint art) = Vat(_vat).urns(_ilk, _urn); amount = toPositiveInt(dai / rate); amount = uint(amount) <= art ? - amount : - toPositiveInt(art); } /// @notice Gets the whole debt of the CDP /// @param _vat Address of Vat contract /// @param _usr Address of the Dai holder /// @param _urn Urn of the Cdp /// @param _ilk Ilk of the Cdp function getAllDebt(address _vat, address _usr, address _urn, bytes32 _ilk) internal view returns (uint daiAmount) { (, uint rate,,,) = Vat(_vat).ilks(_ilk); (, uint art) = Vat(_vat).urns(_ilk, _urn); uint dai = Vat(_vat).dai(_usr); uint rad = sub(mul(art, rate), dai); daiAmount = rad / RAY; daiAmount = mul(daiAmount, RAY) < rad ? daiAmount + 1 : daiAmount; } /// @notice Gets the token address from the Join contract /// @param _joinAddr Address of the Join contract function getCollateralAddr(address _joinAddr) internal view returns (address) { return address(Join(_joinAddr).gem()); } /// @notice Gets CDP info (collateral, debt) /// @param _manager Manager contract /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP function getCdpInfo(Manager _manager, uint _cdpId, bytes32 _ilk) public view returns (uint, uint) { address vat = _manager.vat(); address urn = _manager.urns(_cdpId); (uint collateral, uint debt) = Vat(vat).urns(_ilk, urn); (,uint rate,,,) = Vat(vat).ilks(_ilk); return (collateral, rmul(debt, rate)); } /// @notice Address that owns the DSProxy that owns the CDP /// @param _manager Manager contract /// @param _cdpId Id of the CDP function getOwner(Manager _manager, uint _cdpId) public view returns (address) { DSProxy proxy = DSProxy(uint160(_manager.owns(_cdpId))); return proxy.owner(); } } abstract contract ILendingPool { function flashLoan( address payable _receiver, address _reserve, uint _amount, bytes calldata _params) external virtual; } abstract contract ProtocolInterface { function deposit(address _user, uint256 _amount) public virtual; function withdraw(address _user, uint256 _amount) public virtual; } contract SavingsLogger { event Deposit(address indexed sender, uint8 protocol, uint256 amount); event Withdraw(address indexed sender, uint8 protocol, uint256 amount); event Swap(address indexed sender, uint8 fromProtocol, uint8 toProtocol, uint256 amount); function logDeposit(address _sender, uint8 _protocol, uint256 _amount) external { emit Deposit(_sender, _protocol, _amount); } function logWithdraw(address _sender, uint8 _protocol, uint256 _amount) external { emit Withdraw(_sender, _protocol, _amount); } function logSwap(address _sender, uint8 _protocolFrom, uint8 _protocolTo, uint256 _amount) external { emit Swap(_sender, _protocolFrom, _protocolTo, _amount); } } contract AaveSavingsProtocol is ProtocolInterface, DSAuth { address public constant ADAI_ADDRESS = 0xfC1E690f61EFd961294b3e1Ce3313fBD8aa4f85d; address public constant AAVE_LENDING_POOL = 0x398eC7346DcD622eDc5ae82352F02bE94C62d119; address public constant AAVE_LENDING_POOL_CORE = 0x3dfd23A6c5E8BbcFc9581d2E864a68feb6a076d3; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; function deposit(address _user, uint _amount) public override { require(msg.sender == _user); // get dai from user require(ERC20(DAI_ADDRESS).transferFrom(_user, address(this), _amount)); ERC20(DAI_ADDRESS).approve(AAVE_LENDING_POOL_CORE, uint(-1)); ILendingPool(AAVE_LENDING_POOL).deposit(DAI_ADDRESS, _amount, 0); ERC20(ADAI_ADDRESS).transfer(_user, ERC20(ADAI_ADDRESS).balanceOf(address(this))); } function withdraw(address _user, uint _amount) public override { require(msg.sender == _user); require(ERC20(ADAI_ADDRESS).transferFrom(_user, address(this), _amount)); IAToken(ADAI_ADDRESS).redeem(_amount); // return dai we have to user ERC20(DAI_ADDRESS).transfer(_user, _amount); } } contract CompoundSavingsProtocol { address public constant NEW_CDAI_ADDRESS = 0x5d3a536E4D6DbD6114cc1Ead35777bAB948E3643; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; CTokenInterface public constant cDaiContract = CTokenInterface(NEW_CDAI_ADDRESS); function compDeposit(address _user, uint _amount) internal { // get dai from user require(ERC20(DAI_ADDRESS).transferFrom(_user, address(this), _amount)); // mainnet only ERC20(DAI_ADDRESS).approve(NEW_CDAI_ADDRESS, uint(-1)); // mint cDai require(cDaiContract.mint(_amount) == 0, "Failed Mint"); } function compWithdraw(address _user, uint _amount) internal { // transfer all users balance to this contract require(cDaiContract.transferFrom(_user, address(this), ERC20(NEW_CDAI_ADDRESS).balanceOf(_user))); // approve cDai to compound contract cDaiContract.approve(NEW_CDAI_ADDRESS, uint(-1)); // get dai from cDai contract require(cDaiContract.redeemUnderlying(_amount) == 0, "Reedem Failed"); // return to user balance we didn't spend uint cDaiBalance = cDaiContract.balanceOf(address(this)); if (cDaiBalance > 0) { cDaiContract.transfer(_user, cDaiBalance); } // return dai we have to user ERC20(DAI_ADDRESS).transfer(_user, _amount); } } abstract contract VatLike { function can(address, address) virtual public view returns (uint); function ilks(bytes32) virtual public view returns (uint, uint, uint, uint, uint); function dai(address) virtual public view returns (uint); function urns(bytes32, address) virtual public view returns (uint, uint); function frob(bytes32, address, address, address, int, int) virtual public; function hope(address) virtual public; function move(address, address, uint) virtual public; } abstract contract PotLike { function pie(address) virtual public view returns (uint); function drip() virtual public returns (uint); function join(uint) virtual public; function exit(uint) virtual public; } abstract contract GemLike { function approve(address, uint) virtual public; function transfer(address, uint) virtual public; function transferFrom(address, address, uint) virtual public; function deposit() virtual public payable; function withdraw(uint) virtual public; } abstract contract DaiJoinLike { function vat() virtual public returns (VatLike); function dai() virtual public returns (GemLike); function join(address, uint) virtual public payable; function exit(address, uint) virtual public; } contract DSRSavingsProtocol is DSMath { // Mainnet address public constant POT_ADDRESS = 0x197E90f9FAD81970bA7976f33CbD77088E5D7cf7; address public constant DAI_JOIN_ADDRESS = 0x9759A6Ac90977b93B58547b4A71c78317f391A28; function dsrDeposit(uint _amount, bool _fromUser) internal { VatLike vat = DaiJoinLike(DAI_JOIN_ADDRESS).vat(); uint chi = PotLike(POT_ADDRESS).drip(); daiJoin_join(DAI_JOIN_ADDRESS, address(this), _amount, _fromUser); if (vat.can(address(this), address(POT_ADDRESS)) == 0) { vat.hope(POT_ADDRESS); } PotLike(POT_ADDRESS).join(mul(_amount, RAY) / chi); } function dsrWithdraw(uint _amount, bool _toUser) internal { VatLike vat = DaiJoinLike(DAI_JOIN_ADDRESS).vat(); uint chi = PotLike(POT_ADDRESS).drip(); uint pie = mul(_amount, RAY) / chi; PotLike(POT_ADDRESS).exit(pie); uint balance = DaiJoinLike(DAI_JOIN_ADDRESS).vat().dai(address(this)); if (vat.can(address(this), address(DAI_JOIN_ADDRESS)) == 0) { vat.hope(DAI_JOIN_ADDRESS); } address to; if (_toUser) { to = msg.sender; } else { to = address(this); } if (_amount == uint(-1)) { DaiJoinLike(DAI_JOIN_ADDRESS).exit(to, mul(chi, pie) / RAY); } else { DaiJoinLike(DAI_JOIN_ADDRESS).exit( to, balance >= mul(_amount, RAY) ? _amount : balance / RAY ); } } function daiJoin_join(address apt, address urn, uint wad, bool _fromUser) internal { if (_fromUser) { DaiJoinLike(apt).dai().transferFrom(msg.sender, address(this), wad); } DaiJoinLike(apt).dai().approve(apt, wad); DaiJoinLike(apt).join(urn, wad); } } contract DydxSavingsProtocol is ProtocolInterface, DSAuth { address public constant SOLO_MARGIN_ADDRESS = 0x1E0447b19BB6EcFdAe1e4AE1694b0C3659614e4e; ISoloMargin public soloMargin; address public savingsProxy; uint daiMarketId = 3; constructor() public { soloMargin = ISoloMargin(SOLO_MARGIN_ADDRESS); } function addSavingsProxy(address _savingsProxy) public auth { savingsProxy = _savingsProxy; } function deposit(address _user, uint _amount) public override { require(msg.sender == _user); Account.Info[] memory accounts = new Account.Info[](1); accounts[0] = getAccount(_user, 0); Actions.ActionArgs[] memory actions = new Actions.ActionArgs[](1); Types.AssetAmount memory amount = Types.AssetAmount({ sign: true, denomination: Types.AssetDenomination.Wei, ref: Types.AssetReference.Delta, value: _amount }); actions[0] = Actions.ActionArgs({ actionType: Actions.ActionType.Deposit, accountId: 0, amount: amount, primaryMarketId: daiMarketId, otherAddress: _user, secondaryMarketId: 0, //not used otherAccountId: 0, //not used data: "" //not used }); soloMargin.operate(accounts, actions); } function withdraw(address _user, uint _amount) public override { require(msg.sender == _user); Account.Info[] memory accounts = new Account.Info[](1); accounts[0] = getAccount(_user, 0); Actions.ActionArgs[] memory actions = new Actions.ActionArgs[](1); Types.AssetAmount memory amount = Types.AssetAmount({ sign: false, denomination: Types.AssetDenomination.Wei, ref: Types.AssetReference.Delta, value: _amount }); actions[0] = Actions.ActionArgs({ actionType: Actions.ActionType.Withdraw, accountId: 0, amount: amount, primaryMarketId: daiMarketId, otherAddress: _user, secondaryMarketId: 0, //not used otherAccountId: 0, //not used data: "" //not used }); soloMargin.operate(accounts, actions); } function getWeiBalance(address _user, uint _index) public view returns(Types.Wei memory) { Types.Wei[] memory weiBalances; (,,weiBalances) = soloMargin.getAccountBalances(getAccount(_user, _index)); return weiBalances[daiMarketId]; } function getParBalance(address _user, uint _index) public view returns(Types.Par memory) { Types.Par[] memory parBalances; (,parBalances,) = soloMargin.getAccountBalances(getAccount(_user, _index)); return parBalances[daiMarketId]; } function getAccount(address _user, uint _index) public pure returns(Account.Info memory) { Account.Info memory account = Account.Info({ owner: _user, number: _index }); return account; } } abstract contract ISoloMargin { struct OperatorArg { address operator; bool trusted; } function operate( Account.Info[] memory accounts, Actions.ActionArgs[] memory actions ) public virtual; function getAccountBalances( Account.Info memory account ) public view virtual returns ( address[] memory, Types.Par[] memory, Types.Wei[] memory ); function setOperators( OperatorArg[] memory args ) public virtual; function getNumMarkets() public view virtual returns (uint256); function getMarketTokenAddress(uint256 marketId) public view virtual returns (address); } library Account { // ============ Enums ============ /* * Most-recently-cached account status. * * Normal: Can only be liquidated if the account values are violating the global margin-ratio. * Liquid: Can be liquidated no matter the account values. * Can be vaporized if there are no more positive account values. * Vapor: Has only negative (or zeroed) account values. Can be vaporized. * */ enum Status { Normal, Liquid, Vapor } // ============ Structs ============ // Represents the unique key that specifies an account struct Info { address owner; // The address that owns the account uint256 number; // A nonce that allows a single address to control many accounts } // The complete storage for any account struct Storage { mapping (uint256 => Types.Par) balances; // Mapping from marketId to principal Status status; } // ============ Library Functions ============ function equals( Info memory a, Info memory b ) internal pure returns (bool) { return a.owner == b.owner && a.number == b.number; } } library Actions { // ============ Constants ============ bytes32 constant FILE = "Actions"; // ============ Enums ============ enum ActionType { Deposit, // supply tokens Withdraw, // borrow tokens Transfer, // transfer balance between accounts Buy, // buy an amount of some token (externally) Sell, // sell an amount of some token (externally) Trade, // trade tokens against another account Liquidate, // liquidate an undercollateralized or expiring account Vaporize, // use excess tokens to zero-out a completely negative account Call // send arbitrary data to an address } enum AccountLayout { OnePrimary, TwoPrimary, PrimaryAndSecondary } enum MarketLayout { ZeroMarkets, OneMarket, TwoMarkets } // ============ Structs ============ /* * Arguments that are passed to Solo in an ordered list as part of a single operation. * Each ActionArgs has an actionType which specifies which action struct that this data will be * parsed into before being processed. */ struct ActionArgs { ActionType actionType; uint256 accountId; Types.AssetAmount amount; uint256 primaryMarketId; uint256 secondaryMarketId; address otherAddress; uint256 otherAccountId; bytes data; } // ============ Action Types ============ /* * Moves tokens from an address to Solo. Can either repay a borrow or provide additional supply. */ struct DepositArgs { Types.AssetAmount amount; Account.Info account; uint256 market; address from; } /* * Moves tokens from Solo to another address. Can either borrow tokens or reduce the amount * previously supplied. */ struct WithdrawArgs { Types.AssetAmount amount; Account.Info account; uint256 market; address to; } /* * Transfers balance between two accounts. The msg.sender must be an operator for both accounts. * The amount field applies to accountOne. * This action does not require any token movement since the trade is done internally to Solo. */ struct TransferArgs { Types.AssetAmount amount; Account.Info accountOne; Account.Info accountTwo; uint256 market; } /* * Acquires a certain amount of tokens by spending other tokens. Sends takerMarket tokens to the * specified exchangeWrapper contract and expects makerMarket tokens in return. The amount field * applies to the makerMarket. */ struct BuyArgs { Types.AssetAmount amount; Account.Info account; uint256 makerMarket; uint256 takerMarket; address exchangeWrapper; bytes orderData; } /* * Spends a certain amount of tokens to acquire other tokens. Sends takerMarket tokens to the * specified exchangeWrapper and expects makerMarket tokens in return. The amount field applies * to the takerMarket. */ struct SellArgs { Types.AssetAmount amount; Account.Info account; uint256 takerMarket; uint256 makerMarket; address exchangeWrapper; bytes orderData; } /* * Trades balances between two accounts using any external contract that implements the * AutoTrader interface. The AutoTrader contract must be an operator for the makerAccount (for * which it is trading on-behalf-of). The amount field applies to the makerAccount and the * inputMarket. This proposed change to the makerAccount is passed to the AutoTrader which will * quote a change for the makerAccount in the outputMarket (or will disallow the trade). * This action does not require any token movement since the trade is done internally to Solo. */ struct TradeArgs { Types.AssetAmount amount; Account.Info takerAccount; Account.Info makerAccount; uint256 inputMarket; uint256 outputMarket; address autoTrader; bytes tradeData; } /* * Each account must maintain a certain margin-ratio (specified globally). If the account falls * below this margin-ratio, it can be liquidated by any other account. This allows anyone else * (arbitrageurs) to repay any borrowed asset (owedMarket) of the liquidating account in * exchange for any collateral asset (heldMarket) of the liquidAccount. The ratio is determined * by the price ratio (given by the oracles) plus a spread (specified globally). Liquidating an * account also sets a flag on the account that the account is being liquidated. This allows * anyone to continue liquidating the account until there are no more borrows being taken by the * liquidating account. Liquidators do not have to liquidate the entire account all at once but * can liquidate as much as they choose. The liquidating flag allows liquidators to continue * liquidating the account even if it becomes collateralized through partial liquidation or * price movement. */ struct LiquidateArgs { Types.AssetAmount amount; Account.Info solidAccount; Account.Info liquidAccount; uint256 owedMarket; uint256 heldMarket; } /* * Similar to liquidate, but vaporAccounts are accounts that have only negative balances * remaining. The arbitrageur pays back the negative asset (owedMarket) of the vaporAccount in * exchange for a collateral asset (heldMarket) at a favorable spread. However, since the * liquidAccount has no collateral assets, the collateral must come from Solo's excess tokens. */ struct VaporizeArgs { Types.AssetAmount amount; Account.Info solidAccount; Account.Info vaporAccount; uint256 owedMarket; uint256 heldMarket; } /* * Passes arbitrary bytes of data to an external contract that implements the Callee interface. * Does not change any asset amounts. This function may be useful for setting certain variables * on layer-two contracts for certain accounts without having to make a separate Ethereum * transaction for doing so. Also, the second-layer contracts can ensure that the call is coming * from an operator of the particular account. */ struct CallArgs { Account.Info account; address callee; bytes data; } // ============ Helper Functions ============ function getMarketLayout( ActionType actionType ) internal pure returns (MarketLayout) { if ( actionType == Actions.ActionType.Deposit || actionType == Actions.ActionType.Withdraw || actionType == Actions.ActionType.Transfer ) { return MarketLayout.OneMarket; } else if (actionType == Actions.ActionType.Call) { return MarketLayout.ZeroMarkets; } return MarketLayout.TwoMarkets; } function getAccountLayout( ActionType actionType ) internal pure returns (AccountLayout) { if ( actionType == Actions.ActionType.Transfer || actionType == Actions.ActionType.Trade ) { return AccountLayout.TwoPrimary; } else if ( actionType == Actions.ActionType.Liquidate || actionType == Actions.ActionType.Vaporize ) { return AccountLayout.PrimaryAndSecondary; } return AccountLayout.OnePrimary; } // ============ Parsing Functions ============ function parseDepositArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (DepositArgs memory) { assert(args.actionType == ActionType.Deposit); return DepositArgs({ amount: args.amount, account: accounts[args.accountId], market: args.primaryMarketId, from: args.otherAddress }); } function parseWithdrawArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (WithdrawArgs memory) { assert(args.actionType == ActionType.Withdraw); return WithdrawArgs({ amount: args.amount, account: accounts[args.accountId], market: args.primaryMarketId, to: args.otherAddress }); } function parseTransferArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (TransferArgs memory) { assert(args.actionType == ActionType.Transfer); return TransferArgs({ amount: args.amount, accountOne: accounts[args.accountId], accountTwo: accounts[args.otherAccountId], market: args.primaryMarketId }); } function parseBuyArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (BuyArgs memory) { assert(args.actionType == ActionType.Buy); return BuyArgs({ amount: args.amount, account: accounts[args.accountId], makerMarket: args.primaryMarketId, takerMarket: args.secondaryMarketId, exchangeWrapper: args.otherAddress, orderData: args.data }); } function parseSellArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (SellArgs memory) { assert(args.actionType == ActionType.Sell); return SellArgs({ amount: args.amount, account: accounts[args.accountId], takerMarket: args.primaryMarketId, makerMarket: args.secondaryMarketId, exchangeWrapper: args.otherAddress, orderData: args.data }); } function parseTradeArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (TradeArgs memory) { assert(args.actionType == ActionType.Trade); return TradeArgs({ amount: args.amount, takerAccount: accounts[args.accountId], makerAccount: accounts[args.otherAccountId], inputMarket: args.primaryMarketId, outputMarket: args.secondaryMarketId, autoTrader: args.otherAddress, tradeData: args.data }); } function parseLiquidateArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (LiquidateArgs memory) { assert(args.actionType == ActionType.Liquidate); return LiquidateArgs({ amount: args.amount, solidAccount: accounts[args.accountId], liquidAccount: accounts[args.otherAccountId], owedMarket: args.primaryMarketId, heldMarket: args.secondaryMarketId }); } function parseVaporizeArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (VaporizeArgs memory) { assert(args.actionType == ActionType.Vaporize); return VaporizeArgs({ amount: args.amount, solidAccount: accounts[args.accountId], vaporAccount: accounts[args.otherAccountId], owedMarket: args.primaryMarketId, heldMarket: args.secondaryMarketId }); } function parseCallArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (CallArgs memory) { assert(args.actionType == ActionType.Call); return CallArgs({ account: accounts[args.accountId], callee: args.otherAddress, data: args.data }); } } library Math { using SafeMath for uint256; // ============ Constants ============ bytes32 constant FILE = "Math"; // ============ Library Functions ============ /* * Return target * (numerator / denominator). */ function getPartial( uint256 target, uint256 numerator, uint256 denominator ) internal pure returns (uint256) { return target.mul(numerator).div(denominator); } /* * Return target * (numerator / denominator), but rounded up. */ function getPartialRoundUp( uint256 target, uint256 numerator, uint256 denominator ) internal pure returns (uint256) { if (target == 0 || numerator == 0) { // SafeMath will check for zero denominator return SafeMath.div(0, denominator); } return target.mul(numerator).sub(1).div(denominator).add(1); } function to128( uint256 number ) internal pure returns (uint128) { uint128 result = uint128(number); Require.that( result == number, FILE, "Unsafe cast to uint128" ); return result; } function to96( uint256 number ) internal pure returns (uint96) { uint96 result = uint96(number); Require.that( result == number, FILE, "Unsafe cast to uint96" ); return result; } function to32( uint256 number ) internal pure returns (uint32) { uint32 result = uint32(number); Require.that( result == number, FILE, "Unsafe cast to uint32" ); return result; } function min( uint256 a, uint256 b ) internal pure returns (uint256) { return a < b ? a : b; } function max( uint256 a, uint256 b ) internal pure returns (uint256) { return a > b ? a : b; } } library Require { // ============ Constants ============ uint256 constant ASCII_ZERO = 48; // '0' uint256 constant ASCII_RELATIVE_ZERO = 87; // 'a' - 10 uint256 constant ASCII_LOWER_EX = 120; // 'x' bytes2 constant COLON = 0x3a20; // ': ' bytes2 constant COMMA = 0x2c20; // ', ' bytes2 constant LPAREN = 0x203c; // ' <' byte constant RPAREN = 0x3e; // '>' uint256 constant FOUR_BIT_MASK = 0xf; // ============ Library Functions ============ function that( bool must, bytes32 file, bytes32 reason ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason) ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, uint256 payloadA ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), RPAREN ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, uint256 payloadA, uint256 payloadB ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), COMMA, stringify(payloadB), RPAREN ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, address payloadA ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), RPAREN ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, address payloadA, uint256 payloadB ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), COMMA, stringify(payloadB), RPAREN ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, address payloadA, uint256 payloadB, uint256 payloadC ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), COMMA, stringify(payloadB), COMMA, stringify(payloadC), RPAREN ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, bytes32 payloadA ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), RPAREN ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, bytes32 payloadA, uint256 payloadB, uint256 payloadC ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), COMMA, stringify(payloadB), COMMA, stringify(payloadC), RPAREN ) ) ); } } // ============ Private Functions ============ function stringifyTruncated( bytes32 input ) private pure returns (bytes memory) { // put the input bytes into the result bytes memory result = abi.encodePacked(input); // determine the length of the input by finding the location of the last non-zero byte for (uint256 i = 32; i > 0; ) { // reverse-for-loops with unsigned integer /* solium-disable-next-line security/no-modify-for-iter-var */ i--; // find the last non-zero byte in order to determine the length if (result[i] != 0) { uint256 length = i + 1; /* solium-disable-next-line security/no-inline-assembly */ assembly { mstore(result, length) // r.length = length; } return result; } } // all bytes are zero return new bytes(0); } function stringify( uint256 input ) private pure returns (bytes memory) { if (input == 0) { return "0"; } // get the final string length uint256 j = input; uint256 length; while (j != 0) { length++; j /= 10; } // allocate the string bytes memory bstr = new bytes(length); // populate the string starting with the least-significant character j = input; for (uint256 i = length; i > 0; ) { // reverse-for-loops with unsigned integer /* solium-disable-next-line security/no-modify-for-iter-var */ i--; // take last decimal digit bstr[i] = byte(uint8(ASCII_ZERO + (j % 10))); // remove the last decimal digit j /= 10; } return bstr; } function stringify( address input ) private pure returns (bytes memory) { uint256 z = uint256(input); // addresses are "0x" followed by 20 bytes of data which take up 2 characters each bytes memory result = new bytes(42); // populate the result with "0x" result[0] = byte(uint8(ASCII_ZERO)); result[1] = byte(uint8(ASCII_LOWER_EX)); // for each byte (starting from the lowest byte), populate the result with two characters for (uint256 i = 0; i < 20; i++) { // each byte takes two characters uint256 shift = i * 2; // populate the least-significant character result[41 - shift] = char(z & FOUR_BIT_MASK); z = z >> 4; // populate the most-significant character result[40 - shift] = char(z & FOUR_BIT_MASK); z = z >> 4; } return result; } function stringify( bytes32 input ) private pure returns (bytes memory) { uint256 z = uint256(input); // bytes32 are "0x" followed by 32 bytes of data which take up 2 characters each bytes memory result = new bytes(66); // populate the result with "0x" result[0] = byte(uint8(ASCII_ZERO)); result[1] = byte(uint8(ASCII_LOWER_EX)); // for each byte (starting from the lowest byte), populate the result with two characters for (uint256 i = 0; i < 32; i++) { // each byte takes two characters uint256 shift = i * 2; // populate the least-significant character result[65 - shift] = char(z & FOUR_BIT_MASK); z = z >> 4; // populate the most-significant character result[64 - shift] = char(z & FOUR_BIT_MASK); z = z >> 4; } return result; } function char( uint256 input ) private pure returns (byte) { // return ASCII digit (0-9) if (input < 10) { return byte(uint8(input + ASCII_ZERO)); } // return ASCII letter (a-f) return byte(uint8(input + ASCII_RELATIVE_ZERO)); } } library Types { using Math for uint256; // ============ AssetAmount ============ enum AssetDenomination { Wei, // the amount is denominated in wei Par // the amount is denominated in par } enum AssetReference { Delta, // the amount is given as a delta from the current value Target // the amount is given as an exact number to end up at } struct AssetAmount { bool sign; // true if positive AssetDenomination denomination; AssetReference ref; uint256 value; } // ============ Par (Principal Amount) ============ // Total borrow and supply values for a market struct TotalPar { uint128 borrow; uint128 supply; } // Individual principal amount for an account struct Par { bool sign; // true if positive uint128 value; } function zeroPar() internal pure returns (Par memory) { return Par({ sign: false, value: 0 }); } function sub( Par memory a, Par memory b ) internal pure returns (Par memory) { return add(a, negative(b)); } function add( Par memory a, Par memory b ) internal pure returns (Par memory) { Par memory result; if (a.sign == b.sign) { result.sign = a.sign; result.value = SafeMath.add(a.value, b.value).to128(); } else { if (a.value >= b.value) { result.sign = a.sign; result.value = SafeMath.sub(a.value, b.value).to128(); } else { result.sign = b.sign; result.value = SafeMath.sub(b.value, a.value).to128(); } } return result; } function equals( Par memory a, Par memory b ) internal pure returns (bool) { if (a.value == b.value) { if (a.value == 0) { return true; } return a.sign == b.sign; } return false; } function negative( Par memory a ) internal pure returns (Par memory) { return Par({ sign: !a.sign, value: a.value }); } function isNegative( Par memory a ) internal pure returns (bool) { return !a.sign && a.value > 0; } function isPositive( Par memory a ) internal pure returns (bool) { return a.sign && a.value > 0; } function isZero( Par memory a ) internal pure returns (bool) { return a.value == 0; } // ============ Wei (Token Amount) ============ // Individual token amount for an account struct Wei { bool sign; // true if positive uint256 value; } function zeroWei() internal pure returns (Wei memory) { return Wei({ sign: false, value: 0 }); } function sub( Wei memory a, Wei memory b ) internal pure returns (Wei memory) { return add(a, negative(b)); } function add( Wei memory a, Wei memory b ) internal pure returns (Wei memory) { Wei memory result; if (a.sign == b.sign) { result.sign = a.sign; result.value = SafeMath.add(a.value, b.value); } else { if (a.value >= b.value) { result.sign = a.sign; result.value = SafeMath.sub(a.value, b.value); } else { result.sign = b.sign; result.value = SafeMath.sub(b.value, a.value); } } return result; } function equals( Wei memory a, Wei memory b ) internal pure returns (bool) { if (a.value == b.value) { if (a.value == 0) { return true; } return a.sign == b.sign; } return false; } function negative( Wei memory a ) internal pure returns (Wei memory) { return Wei({ sign: !a.sign, value: a.value }); } function isNegative( Wei memory a ) internal pure returns (bool) { return !a.sign && a.value > 0; } function isPositive( Wei memory a ) internal pure returns (bool) { return a.sign && a.value > 0; } function isZero( Wei memory a ) internal pure returns (bool) { return a.value == 0; } } contract FulcrumSavingsProtocol is ProtocolInterface, DSAuth { address public constant NEW_IDAI_ADDRESS = 0x493C57C4763932315A328269E1ADaD09653B9081; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; address public savingsProxy; uint public decimals = 10 ** 18; function addSavingsProxy(address _savingsProxy) public auth { savingsProxy = _savingsProxy; } function deposit(address _user, uint _amount) public override { require(msg.sender == _user); // get dai from user require(ERC20(DAI_ADDRESS).transferFrom(_user, address(this), _amount)); // approve dai to Fulcrum ERC20(DAI_ADDRESS).approve(NEW_IDAI_ADDRESS, uint(-1)); // mint iDai ITokenInterface(NEW_IDAI_ADDRESS).mint(_user, _amount); } function withdraw(address _user, uint _amount) public override { require(msg.sender == _user); // transfer all users tokens to our contract require(ERC20(NEW_IDAI_ADDRESS).transferFrom(_user, address(this), ITokenInterface(NEW_IDAI_ADDRESS).balanceOf(_user))); // approve iDai to that contract ERC20(NEW_IDAI_ADDRESS).approve(NEW_IDAI_ADDRESS, uint(-1)); uint tokenPrice = ITokenInterface(NEW_IDAI_ADDRESS).tokenPrice(); // get dai from iDai contract ITokenInterface(NEW_IDAI_ADDRESS).burn(_user, _amount * decimals / tokenPrice); // return all remaining tokens back to user require(ERC20(NEW_IDAI_ADDRESS).transfer(_user, ITokenInterface(NEW_IDAI_ADDRESS).balanceOf(address(this)))); } } contract LoanShifterTaker is AdminAuth, ProxyPermission { ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; address public constant MANAGER_ADDRESS = 0x5ef30b9986345249bc32d8928B7ee64DE9435E39; Manager public constant manager = Manager(MANAGER_ADDRESS); ShifterRegistry public constant shifterRegistry = ShifterRegistry(0x2612Af3A521c2df9EAF28422Ca335b04AdF3ac66); enum Protocols { MCD, COMPOUND } enum SwapType { NO_SWAP, COLL_SWAP, DEBT_SWAP } struct LoanShiftData { Protocols fromProtocol; Protocols toProtocol; SwapType swapType; bool wholeDebt; uint collAmount; uint debtAmount; address debtAddr1; address debtAddr2; address addrLoan1; address addrLoan2; uint id1; uint id2; } /// @notice Main entry point, it will move or transform a loan /// @dev Called through DSProxy function moveLoan( SaverExchangeCore.ExchangeData memory _exchangeData, LoanShiftData memory _loanShift ) public { if (_isSameTypeVaults(_loanShift)) { _forkVault(_loanShift); return; } _callCloseAndOpen(_exchangeData, _loanShift); } //////////////////////// INTERNAL FUNCTIONS ////////////////////////// function _callCloseAndOpen( SaverExchangeCore.ExchangeData memory _exchangeData, LoanShiftData memory _loanShift ) internal { address protoAddr = shifterRegistry.getAddr(getNameByProtocol(uint8(_loanShift.fromProtocol))); uint loanAmount = _loanShift.debtAmount; if (_loanShift.wholeDebt) { loanAmount = ILoanShifter(protoAddr).getLoanAmount(_loanShift.id1, _loanShift.addrLoan1); } ( uint[8] memory numData, address[8] memory addrData, uint8[3] memory enumData, bytes memory callData ) = _packData(_loanShift, _exchangeData); // encode data bytes memory paramsData = abi.encode(numData, addrData, enumData, callData, address(this)); address payable loanShifterReceiverAddr = payable(shifterRegistry.getAddr("LOAN_SHIFTER_RECEIVER")); // call FL givePermission(loanShifterReceiverAddr); lendingPool.flashLoan(loanShifterReceiverAddr, getLoanAddr(_loanShift.debtAddr1, _loanShift.fromProtocol), loanAmount, paramsData); removePermission(loanShifterReceiverAddr); } function _forkVault(LoanShiftData memory _loanShift) internal { // Create new Vault to move to if (_loanShift.id2 == 0) { _loanShift.id2 = manager.open(manager.ilks(_loanShift.id1), address(this)); } if (_loanShift.wholeDebt) { manager.shift(_loanShift.id1, _loanShift.id2); } } function _isSameTypeVaults(LoanShiftData memory _loanShift) internal pure returns (bool) { return _loanShift.fromProtocol == Protocols.MCD && _loanShift.toProtocol == Protocols.MCD && _loanShift.addrLoan1 == _loanShift.addrLoan2; } function getNameByProtocol(uint8 _proto) internal pure returns (string memory) { if (_proto == 0) { return "MCD_SHIFTER"; } else if (_proto == 1) { return "COMP_SHIFTER"; } } function getLoanAddr(address _address, Protocols _fromProtocol) internal returns (address) { if (_fromProtocol == Protocols.COMPOUND) { return CTokenInterface(_address).underlying(); } else if (_fromProtocol == Protocols.MCD) { return DAI_ADDRESS; } else { return address(0); } } function _packData( LoanShiftData memory _loanShift, SaverExchangeCore.ExchangeData memory exchangeData ) internal pure returns (uint[8] memory numData, address[8] memory addrData, uint8[3] memory enumData, bytes memory callData) { numData = [ _loanShift.collAmount, _loanShift.debtAmount, _loanShift.id1, _loanShift.id2, exchangeData.srcAmount, exchangeData.destAmount, exchangeData.minPrice, exchangeData.price0x ]; addrData = [ _loanShift.addrLoan1, _loanShift.addrLoan2, _loanShift.debtAddr1, _loanShift.debtAddr2, exchangeData.srcAddr, exchangeData.destAddr, exchangeData.exchangeAddr, exchangeData.wrapper ]; enumData = [ uint8(_loanShift.fromProtocol), uint8(_loanShift.toProtocol), uint8(_loanShift.swapType) ]; callData = exchangeData.callData; } } contract ShifterRegistry is AdminAuth { mapping (string => address) public contractAddresses; bool public finalized; function changeContractAddr(string memory _contractName, address _protoAddr) public onlyOwner { require(!finalized); contractAddresses[_contractName] = _protoAddr; } function lock() public onlyOwner { finalized = true; } function getAddr(string memory _contractName) public view returns (address contractAddr) { contractAddr = contractAddresses[_contractName]; require(contractAddr != address(0), "No contract address registred"); } } library Address { function isContract(address account) internal view returns (bool) { // According to EIP-1052, 0x0 is the value returned for not-yet created accounts // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned // for accounts without code, i.e. `keccak256('')` bytes32 codehash; bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470; // solhint-disable-next-line no-inline-assembly assembly { codehash := extcodehash(account) } return (codehash != accountHash && codehash != 0x0); } function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return _functionCallWithValue(target, data, 0, errorMessage); } function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); return _functionCallWithValue(target, data, value, errorMessage); } function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) { require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: weiValue }(data); if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } contract BotRegistry is AdminAuth { mapping (address => bool) public botList; constructor() public { botList[0x776B4a13093e30B05781F97F6A4565B6aa8BE330] = true; botList[0xAED662abcC4FA3314985E67Ea993CAD064a7F5cF] = true; botList[0xa5d330F6619d6bF892A5B87D80272e1607b3e34D] = true; botList[0x5feB4DeE5150B589a7f567EA7CADa2759794A90A] = true; botList[0x7ca06417c1d6f480d3bB195B80692F95A6B66158] = true; } function setBot(address _botAddr, bool _state) public onlyOwner { botList[_botAddr] = _state; } } contract DFSProxy is Auth { string public constant NAME = "DFSProxy"; string public constant VERSION = "v0.1"; mapping(address => mapping(uint => bool)) public nonces; // --- EIP712 niceties --- bytes32 public DOMAIN_SEPARATOR; bytes32 public constant PERMIT_TYPEHASH = keccak256("callProxy(address _user,address _proxy,address _contract,bytes _txData,uint256 _nonce)"); constructor(uint256 chainId_) public { DOMAIN_SEPARATOR = keccak256(abi.encode( keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"), keccak256(bytes(NAME)), keccak256(bytes(VERSION)), chainId_, address(this) )); } function callProxy(address _user, address _proxy, address _contract, bytes calldata _txData, uint256 _nonce, uint8 _v, bytes32 _r, bytes32 _s) external payable onlyAuthorized { bytes32 digest = keccak256(abi.encodePacked( "\x19\x01", DOMAIN_SEPARATOR, keccak256(abi.encode(PERMIT_TYPEHASH, _user, _proxy, _contract, _txData, _nonce)) )); // user must be proxy owner require(DSProxyInterface(_proxy).owner() == _user); require(_user == ecrecover(digest, _v, _r, _s), "DFSProxy/user-not-valid"); require(!nonces[_user][_nonce], "DFSProxy/invalid-nonce"); nonces[_user][_nonce] = true; DSProxyInterface(_proxy).execute{value: msg.value}(_contract, _txData); } } contract DebugInfo { mapping (string => uint) public uintValues; mapping (string => address) public addrValues; mapping (string => string) public stringValues; mapping (string => bytes32) public bytes32Values; function logUint(string memory _id, uint _value) public { uintValues[_id] = _value; } function logAddr(string memory _id, address _value) public { addrValues[_id] = _value; } function logString(string memory _id, string memory _value) public { stringValues[_id] = _value; } function logBytes32(string memory _id, bytes32 _value) public { bytes32Values[_id] = _value; } } contract Discount { address public owner; mapping(address => CustomServiceFee) public serviceFees; uint256 constant MAX_SERVICE_FEE = 400; struct CustomServiceFee { bool active; uint256 amount; } constructor() public { owner = msg.sender; } function isCustomFeeSet(address _user) public view returns (bool) { return serviceFees[_user].active; } function getCustomServiceFee(address _user) public view returns (uint256) { return serviceFees[_user].amount; } function setServiceFee(address _user, uint256 _fee) public { require(msg.sender == owner, "Only owner"); require(_fee >= MAX_SERVICE_FEE || _fee == 0); serviceFees[_user] = CustomServiceFee({active: true, amount: _fee}); } function disableServiceFee(address _user) public { require(msg.sender == owner, "Only owner"); serviceFees[_user] = CustomServiceFee({active: false, amount: 0}); } } contract DydxFlashLoanBase { using SafeMath for uint256; address public constant SOLO_MARGIN_ADDRESS = 0x1E0447b19BB6EcFdAe1e4AE1694b0C3659614e4e; function _getMarketIdFromTokenAddress(address token) internal view returns (uint256) { return 0; } function _getRepaymentAmountInternal(uint256 amount) internal view returns (uint256) { // Needs to be overcollateralize // Needs to provide +2 wei to be safe return amount.add(2); } function _getAccountInfo() internal view returns (Account.Info memory) { return Account.Info({owner: address(this), number: 1}); } function _getWithdrawAction(uint marketId, uint256 amount, address contractAddr) internal view returns (Actions.ActionArgs memory) { return Actions.ActionArgs({ actionType: Actions.ActionType.Withdraw, accountId: 0, amount: Types.AssetAmount({ sign: false, denomination: Types.AssetDenomination.Wei, ref: Types.AssetReference.Delta, value: amount }), primaryMarketId: marketId, secondaryMarketId: 0, otherAddress: contractAddr, otherAccountId: 0, data: "" }); } function _getCallAction(bytes memory data, address contractAddr) internal view returns (Actions.ActionArgs memory) { return Actions.ActionArgs({ actionType: Actions.ActionType.Call, accountId: 0, amount: Types.AssetAmount({ sign: false, denomination: Types.AssetDenomination.Wei, ref: Types.AssetReference.Delta, value: 0 }), primaryMarketId: 0, secondaryMarketId: 0, otherAddress: contractAddr, otherAccountId: 0, data: data }); } function _getDepositAction(uint marketId, uint256 amount, address contractAddr) internal view returns (Actions.ActionArgs memory) { return Actions.ActionArgs({ actionType: Actions.ActionType.Deposit, accountId: 0, amount: Types.AssetAmount({ sign: true, denomination: Types.AssetDenomination.Wei, ref: Types.AssetReference.Delta, value: amount }), primaryMarketId: marketId, secondaryMarketId: 0, otherAddress: contractAddr, otherAccountId: 0, data: "" }); } } contract ExchangeDataParser { function decodeExchangeData( SaverExchangeCore.ExchangeData memory exchangeData ) internal pure returns (address[4] memory, uint[4] memory, bytes memory) { return ( [exchangeData.srcAddr, exchangeData.destAddr, exchangeData.exchangeAddr, exchangeData.wrapper], [exchangeData.srcAmount, exchangeData.destAmount, exchangeData.minPrice, exchangeData.price0x], exchangeData.callData ); } function encodeExchangeData( address[4] memory exAddr, uint[4] memory exNum, bytes memory callData ) internal pure returns (SaverExchangeCore.ExchangeData memory) { return SaverExchangeCore.ExchangeData({ srcAddr: exAddr[0], destAddr: exAddr[1], srcAmount: exNum[0], destAmount: exNum[1], minPrice: exNum[2], wrapper: exAddr[3], exchangeAddr: exAddr[2], callData: callData, price0x: exNum[3] }); } } interface IFlashLoanReceiver { function executeOperation(address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external; } abstract contract ILendingPoolAddressesProvider { function getLendingPool() public view virtual returns (address); function setLendingPoolImpl(address _pool) public virtual; function getLendingPoolCore() public virtual view returns (address payable); function setLendingPoolCoreImpl(address _lendingPoolCore) public virtual; function getLendingPoolConfigurator() public virtual view returns (address); function setLendingPoolConfiguratorImpl(address _configurator) public virtual; function getLendingPoolDataProvider() public virtual view returns (address); function setLendingPoolDataProviderImpl(address _provider) public virtual; function getLendingPoolParametersProvider() public virtual view returns (address); function setLendingPoolParametersProviderImpl(address _parametersProvider) public virtual; function getTokenDistributor() public virtual view returns (address); function setTokenDistributor(address _tokenDistributor) public virtual; function getFeeProvider() public virtual view returns (address); function setFeeProviderImpl(address _feeProvider) public virtual; function getLendingPoolLiquidationManager() public virtual view returns (address); function setLendingPoolLiquidationManager(address _manager) public virtual; function getLendingPoolManager() public virtual view returns (address); function setLendingPoolManager(address _lendingPoolManager) public virtual; function getPriceOracle() public virtual view returns (address); function setPriceOracle(address _priceOracle) public virtual; function getLendingRateOracle() public view virtual returns (address); function setLendingRateOracle(address _lendingRateOracle) public virtual; } library EthAddressLib { function ethAddress() internal pure returns(address) { return 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; } } abstract contract FlashLoanReceiverBase is IFlashLoanReceiver { using SafeERC20 for ERC20; using SafeMath for uint256; ILendingPoolAddressesProvider public addressesProvider; constructor(ILendingPoolAddressesProvider _provider) public { addressesProvider = _provider; } receive () external virtual payable {} function transferFundsBackToPoolInternal(address _reserve, uint256 _amount) internal { address payable core = addressesProvider.getLendingPoolCore(); transferInternal(core,_reserve, _amount); } function transferInternal(address payable _destination, address _reserve, uint256 _amount) internal { if(_reserve == EthAddressLib.ethAddress()) { //solium-disable-next-line _destination.call{value: _amount}(""); return; } ERC20(_reserve).safeTransfer(_destination, _amount); } function getBalanceInternal(address _target, address _reserve) internal view returns(uint256) { if(_reserve == EthAddressLib.ethAddress()) { return _target.balance; } return ERC20(_reserve).balanceOf(_target); } } contract GasBurner { // solhint-disable-next-line const-name-snakecase GasTokenInterface public constant gasToken = GasTokenInterface(0x0000000000b3F879cb30FE243b4Dfee438691c04); modifier burnGas(uint _amount) { if (gasToken.balanceOf(address(this)) >= _amount) { gasToken.free(_amount); } _; } } library SafeERC20 { using SafeMath for uint256; using Address for address; function safeTransfer(ERC20 token, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } function safeTransferFrom(ERC20 token, address from, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value)); } /** * @dev Deprecated. This function has issues similar to the ones found in * {IERC20-approve}, and its usage is discouraged. */ function safeApprove(ERC20 token, address spender, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value)); } function safeIncreaseAllowance(ERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).add(value); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } function safeDecreaseAllowance(ERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero"); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } function _callOptionalReturn(ERC20 token, bytes memory data) private { bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed"); if (returndata.length > 0) { // Return data is optional // solhint-disable-next-line max-line-length require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } } } library SafeMath { function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } contract ZrxAllowlist is AdminAuth { mapping (address => bool) public zrxAllowlist; mapping(address => bool) private nonPayableAddrs; constructor() public { zrxAllowlist[0x6958F5e95332D93D21af0D7B9Ca85B8212fEE0A5] = true; zrxAllowlist[0x61935CbDd02287B511119DDb11Aeb42F1593b7Ef] = true; zrxAllowlist[0xDef1C0ded9bec7F1a1670819833240f027b25EfF] = true; zrxAllowlist[0x080bf510FCbF18b91105470639e9561022937712] = true; nonPayableAddrs[0x080bf510FCbF18b91105470639e9561022937712] = true; } function setAllowlistAddr(address _zrxAddr, bool _state) public onlyOwner { zrxAllowlist[_zrxAddr] = _state; } function isZrxAddr(address _zrxAddr) public view returns (bool) { return zrxAllowlist[_zrxAddr]; } function addNonPayableAddr(address _nonPayableAddr) public onlyOwner { nonPayableAddrs[_nonPayableAddr] = true; } function removeNonPayableAddr(address _nonPayableAddr) public onlyOwner { nonPayableAddrs[_nonPayableAddr] = false; } function isNonPayableAddr(address _addr) public view returns(bool) { return nonPayableAddrs[_addr]; } } contract AaveBasicProxy is GasBurner { using SafeERC20 for ERC20; address public constant ETH_ADDR = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant AAVE_LENDING_POOL_ADDRESSES = 0x24a42fD28C976A61Df5D00D0599C34c4f90748c8; uint16 public constant AAVE_REFERRAL_CODE = 64; /// @notice User deposits tokens to the Aave protocol /// @dev User needs to approve the DSProxy to pull the _tokenAddr tokens /// @param _tokenAddr The address of the token to be deposited /// @param _amount Amount of tokens to be deposited function deposit(address _tokenAddr, uint256 _amount) public burnGas(5) payable { address lendingPoolCore = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); uint ethValue = _amount; if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(this), _amount); approveToken(_tokenAddr, lendingPoolCore); ethValue = 0; } ILendingPool(lendingPool).deposit{value: ethValue}(_tokenAddr, _amount, AAVE_REFERRAL_CODE); setUserUseReserveAsCollateralIfNeeded(_tokenAddr); } /// @notice User withdraws tokens from the Aave protocol /// @param _tokenAddr The address of the token to be withdrawn /// @param _aTokenAddr ATokens to be withdrawn /// @param _amount Amount of tokens to be withdrawn /// @param _wholeAmount If true we will take the whole amount on chain function withdraw(address _tokenAddr, address _aTokenAddr, uint256 _amount, bool _wholeAmount) public burnGas(8) { uint256 amount = _wholeAmount ? ERC20(_aTokenAddr).balanceOf(address(this)) : _amount; IAToken(_aTokenAddr).redeem(amount); withdrawTokens(_tokenAddr); } /// @notice User borrows tokens to the Aave protocol /// @param _tokenAddr The address of the token to be borrowed /// @param _amount Amount of tokens to be borrowed /// @param _type Send 1 for variable rate and 2 for fixed rate function borrow(address _tokenAddr, uint256 _amount, uint256 _type) public burnGas(8) { address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); ILendingPool(lendingPool).borrow(_tokenAddr, _amount, _type, AAVE_REFERRAL_CODE); withdrawTokens(_tokenAddr); } /// @dev User needs to approve the DSProxy to pull the _tokenAddr tokens /// @notice User paybacks tokens to the Aave protocol /// @param _tokenAddr The address of the token to be paybacked /// @param _aTokenAddr ATokens to be paybacked /// @param _amount Amount of tokens to be payed back /// @param _wholeDebt If true the _amount will be set to the whole amount of the debt function payback(address _tokenAddr, address _aTokenAddr, uint256 _amount, bool _wholeDebt) public burnGas(3) payable { address lendingPoolCore = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); uint256 amount = _amount; (,uint256 borrowAmount,,,,,uint256 originationFee,,,) = ILendingPool(lendingPool).getUserReserveData(_tokenAddr, address(this)); if (_wholeDebt) { amount = borrowAmount; } amount += originationFee; if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(this), amount); approveToken(_tokenAddr, lendingPoolCore); } ILendingPool(lendingPool).repay{value: msg.value}(_tokenAddr, amount, payable(address(this))); withdrawTokens(_tokenAddr); } /// @dev User needs to approve the DSProxy to pull the _tokenAddr tokens /// @notice User paybacks tokens to the Aave protocol /// @param _tokenAddr The address of the token to be paybacked /// @param _aTokenAddr ATokens to be paybacked /// @param _amount Amount of tokens to be payed back /// @param _wholeDebt If true the _amount will be set to the whole amount of the debt function paybackOnBehalf(address _tokenAddr, address _aTokenAddr, uint256 _amount, bool _wholeDebt, address payable _onBehalf) public burnGas(3) payable { address lendingPoolCore = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); uint256 amount = _amount; (,uint256 borrowAmount,,,,,uint256 originationFee,,,) = ILendingPool(lendingPool).getUserReserveData(_tokenAddr, _onBehalf); if (_wholeDebt) { amount = borrowAmount; } amount += originationFee; if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(this), amount); approveToken(_tokenAddr, lendingPoolCore); } ILendingPool(lendingPool).repay{value: msg.value}(_tokenAddr, amount, _onBehalf); withdrawTokens(_tokenAddr); } /// @notice Helper method to withdraw tokens from the DSProxy /// @param _tokenAddr Address of the token to be withdrawn function withdrawTokens(address _tokenAddr) public { uint256 amount = _tokenAddr == ETH_ADDR ? address(this).balance : ERC20(_tokenAddr).balanceOf(address(this)); if (amount > 0) { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransfer(msg.sender, amount); } else { msg.sender.transfer(amount); } } } /// @notice Approves token contract to pull underlying tokens from the DSProxy /// @param _tokenAddr Token we are trying to approve /// @param _caller Address which will gain the approval function approveToken(address _tokenAddr, address _caller) internal { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeApprove(_caller, 0); ERC20(_tokenAddr).safeApprove(_caller, uint256(-1)); } } function setUserUseReserveAsCollateralIfNeeded(address _tokenAddr) public { address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); (,,,,,,,,,bool collateralEnabled) = ILendingPool(lendingPool).getUserReserveData(_tokenAddr, address(this)); if (!collateralEnabled) { ILendingPool(lendingPool).setUserUseReserveAsCollateral(_tokenAddr, true); } } function setUserUseReserveAsCollateral(address _tokenAddr, bool _true) public { address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); ILendingPool(lendingPool).setUserUseReserveAsCollateral(_tokenAddr, _true); } function swapBorrowRateMode(address _reserve) public { address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); ILendingPool(lendingPool).swapBorrowRateMode(_reserve); } } contract AaveLoanInfo is AaveSafetyRatio { struct LoanData { address user; uint128 ratio; address[] collAddr; address[] borrowAddr; uint256[] collAmounts; uint256[] borrowAmounts; } struct TokenInfo { address aTokenAddress; address underlyingTokenAddress; uint256 collateralFactor; uint256 price; } struct TokenInfoFull { address aTokenAddress; address underlyingTokenAddress; uint256 supplyRate; uint256 borrowRate; uint256 totalSupply; uint256 availableLiquidity; uint256 totalBorrow; uint256 collateralFactor; uint256 price; bool usageAsCollateralEnabled; } /// @notice Calcualted the ratio of coll/debt for a compound user /// @param _user Address of the user function getRatio(address _user) public view returns (uint256) { // For each asset the account is in return getSafetyRatio(_user); } /// @notice Fetches Aave prices for tokens /// @param _tokens Arr. of tokens for which to get the prices /// @return prices Array of prices function getPrices(address[] memory _tokens) public view returns (uint256[] memory prices) { address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); prices = new uint[](_tokens.length); for (uint256 i = 0; i < _tokens.length; ++i) { prices[i] = IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_tokens[i]); } } /// @notice Fetches Aave collateral factors for tokens /// @param _tokens Arr. of tokens for which to get the coll. factors /// @return collFactors Array of coll. factors function getCollFactors(address[] memory _tokens) public view returns (uint256[] memory collFactors) { address lendingPoolCoreAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); collFactors = new uint256[](_tokens.length); for (uint256 i = 0; i < _tokens.length; ++i) { (,collFactors[i],,) = ILendingPool(lendingPoolCoreAddress).getReserveConfiguration(_tokens[i]); } } function getTokenBalances(address _user, address[] memory _tokens) public view returns (uint256[] memory balances, uint256[] memory borrows, bool[] memory enabledAsCollateral) { address lendingPoolAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); balances = new uint256[](_tokens.length); borrows = new uint256[](_tokens.length); enabledAsCollateral = new bool[](_tokens.length); for (uint256 i = 0; i < _tokens.length; i++) { address asset = _tokens[i]; (balances[i], borrows[i],,,,,,,,enabledAsCollateral[i]) = ILendingPool(lendingPoolAddress).getUserReserveData(asset, _user); } } /// @notice Calcualted the ratio of coll/debt for an aave user /// @param _users Addresses of the user /// @return ratios Array of ratios function getRatios(address[] memory _users) public view returns (uint256[] memory ratios) { ratios = new uint256[](_users.length); for (uint256 i = 0; i < _users.length; ++i) { ratios[i] = getSafetyRatio(_users[i]); } } /// @notice Information about reserves /// @param _tokenAddresses Array of tokens addresses /// @return tokens Array of reserves infomartion function getTokensInfo(address[] memory _tokenAddresses) public view returns(TokenInfo[] memory tokens) { address lendingPoolCoreAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); tokens = new TokenInfo[](_tokenAddresses.length); for (uint256 i = 0; i < _tokenAddresses.length; ++i) { (,uint256 ltv,,) = ILendingPool(lendingPoolCoreAddress).getReserveConfiguration(_tokenAddresses[i]); tokens[i] = TokenInfo({ aTokenAddress: ILendingPool(lendingPoolCoreAddress).getReserveATokenAddress(_tokenAddresses[i]), underlyingTokenAddress: _tokenAddresses[i], collateralFactor: ltv, price: IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_tokenAddresses[i]) }); } } /// @notice Information about reserves /// @param _tokenAddresses Array of token addresses /// @return tokens Array of reserves infomartion function getFullTokensInfo(address[] memory _tokenAddresses) public view returns(TokenInfoFull[] memory tokens) { address lendingPoolCoreAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); tokens = new TokenInfoFull[](_tokenAddresses.length); for (uint256 i = 0; i < _tokenAddresses.length; ++i) { (,uint256 ltv,,bool usageAsCollateralEnabled) = ILendingPool(lendingPoolCoreAddress).getReserveConfiguration(_tokenAddresses[i]); tokens[i] = TokenInfoFull({ aTokenAddress: ILendingPool(lendingPoolCoreAddress).getReserveATokenAddress(_tokenAddresses[i]), underlyingTokenAddress: _tokenAddresses[i], supplyRate: ILendingPool(lendingPoolCoreAddress).getReserveCurrentLiquidityRate(_tokenAddresses[i]), borrowRate: ILendingPool(lendingPoolCoreAddress).getReserveCurrentVariableBorrowRate(_tokenAddresses[i]), totalSupply: ILendingPool(lendingPoolCoreAddress).getReserveTotalLiquidity(_tokenAddresses[i]), availableLiquidity: ILendingPool(lendingPoolCoreAddress).getReserveAvailableLiquidity(_tokenAddresses[i]), totalBorrow: ILendingPool(lendingPoolCoreAddress).getReserveTotalBorrowsVariable(_tokenAddresses[i]), collateralFactor: ltv, price: IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_tokenAddresses[i]), usageAsCollateralEnabled: usageAsCollateralEnabled }); } } /// @notice Fetches all the collateral/debt address and amounts, denominated in ether /// @param _user Address of the user /// @return data LoanData information function getLoanData(address _user) public view returns (LoanData memory data) { address lendingPoolAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); address[] memory reserves = ILendingPool(lendingPoolAddress).getReserves(); data = LoanData({ user: _user, ratio: 0, collAddr: new address[](reserves.length), borrowAddr: new address[](reserves.length), collAmounts: new uint[](reserves.length), borrowAmounts: new uint[](reserves.length) }); uint64 collPos = 0; uint64 borrowPos = 0; for (uint64 i = 0; i < reserves.length; i++) { address reserve = reserves[i]; (uint256 aTokenBalance, uint256 borrowBalance,,,,,,,,) = ILendingPool(lendingPoolAddress).getUserReserveData(reserve, _user); uint256 price = IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(reserves[i]); if (aTokenBalance > 0) { uint256 userTokenBalanceEth = wmul(aTokenBalance, price) * (10 ** (18 - getDecimals(reserve))); data.collAddr[collPos] = reserve; data.collAmounts[collPos] = userTokenBalanceEth; collPos++; } // Sum up debt in Eth if (borrowBalance > 0) { uint256 userBorrowBalanceEth = wmul(borrowBalance, price) * (10 ** (18 - getDecimals(reserve))); data.borrowAddr[borrowPos] = reserve; data.borrowAmounts[borrowPos] = userBorrowBalanceEth; borrowPos++; } } data.ratio = uint128(getSafetyRatio(_user)); return data; } /// @notice Fetches all the collateral/debt address and amounts, denominated in ether /// @param _users Addresses of the user /// @return loans Array of LoanData information function getLoanDataArr(address[] memory _users) public view returns (LoanData[] memory loans) { loans = new LoanData[](_users.length); for (uint i = 0; i < _users.length; ++i) { loans[i] = getLoanData(_users[i]); } } function getDecimals(address _token) internal view returns (uint256) { if (_token == ETH_ADDR) return 18; return ERC20(_token).decimals(); } } contract AaveMonitor is AdminAuth, DSMath, AaveSafetyRatio, GasBurner { using SafeERC20 for ERC20; enum Method { Boost, Repay } uint public REPAY_GAS_TOKEN = 19; uint public BOOST_GAS_TOKEN = 19; uint public MAX_GAS_PRICE = 200000000000; // 200 gwei uint public REPAY_GAS_COST = 2000000; uint public BOOST_GAS_COST = 2000000; address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; AaveMonitorProxy public aaveMonitorProxy; AaveSubscriptions public subscriptionsContract; address public aaveSaverProxy; DefisaverLogger public logger = DefisaverLogger(DEFISAVER_LOGGER); modifier onlyApproved() { require(BotRegistry(BOT_REGISTRY_ADDRESS).botList(msg.sender), "Not auth bot"); _; } /// @param _aaveMonitorProxy Proxy contracts that actually is authorized to call DSProxy /// @param _subscriptions Subscriptions contract for Aave positions /// @param _aaveSaverProxy Contract that actually performs Repay/Boost constructor(address _aaveMonitorProxy, address _subscriptions, address _aaveSaverProxy) public { aaveMonitorProxy = AaveMonitorProxy(_aaveMonitorProxy); subscriptionsContract = AaveSubscriptions(_subscriptions); aaveSaverProxy = _aaveSaverProxy; } /// @notice Bots call this method to repay for user when conditions are met /// @dev If the contract ownes gas token it will try and use it for gas price reduction /// @param _exData Exchange data /// @param _user The actual address that owns the Aave position function repayFor( SaverExchangeCore.ExchangeData memory _exData, address _user ) public payable onlyApproved burnGas(REPAY_GAS_TOKEN) { (bool isAllowed, uint ratioBefore) = canCall(Method.Repay, _user); require(isAllowed); // check if conditions are met uint256 gasCost = calcGasCost(REPAY_GAS_COST); aaveMonitorProxy.callExecute{value: msg.value}( _user, aaveSaverProxy, abi.encodeWithSignature( "repay((address,address,uint256,uint256,uint256,address,address,bytes,uint256),uint256)", _exData, gasCost ) ); (bool isGoodRatio, uint ratioAfter) = ratioGoodAfter(Method.Repay, _user); require(isGoodRatio); // check if the after result of the actions is good returnEth(); logger.Log(address(this), _user, "AutomaticAaveRepay", abi.encode(ratioBefore, ratioAfter)); } /// @notice Bots call this method to boost for user when conditions are met /// @dev If the contract ownes gas token it will try and use it for gas price reduction /// @param _exData Exchange data /// @param _user The actual address that owns the Aave position function boostFor( SaverExchangeCore.ExchangeData memory _exData, address _user ) public payable onlyApproved burnGas(BOOST_GAS_TOKEN) { (bool isAllowed, uint ratioBefore) = canCall(Method.Boost, _user); require(isAllowed); // check if conditions are met uint256 gasCost = calcGasCost(BOOST_GAS_COST); aaveMonitorProxy.callExecute{value: msg.value}( _user, aaveSaverProxy, abi.encodeWithSignature( "boost((address,address,uint256,uint256,uint256,address,address,bytes,uint256),uint256)", _exData, gasCost ) ); (bool isGoodRatio, uint ratioAfter) = ratioGoodAfter(Method.Boost, _user); require(isGoodRatio); // check if the after result of the actions is good returnEth(); logger.Log(address(this), _user, "AutomaticAaveBoost", abi.encode(ratioBefore, ratioAfter)); } /******************* INTERNAL METHODS ********************************/ function returnEth() internal { // return if some eth left if (address(this).balance > 0) { msg.sender.transfer(address(this).balance); } } /******************* STATIC METHODS ********************************/ /// @notice Checks if Boost/Repay could be triggered for the CDP /// @dev Called by AaveMonitor to enforce the min/max check /// @param _method Type of action to be called /// @param _user The actual address that owns the Aave position /// @return Boolean if it can be called and the ratio function canCall(Method _method, address _user) public view returns(bool, uint) { bool subscribed = subscriptionsContract.isSubscribed(_user); AaveSubscriptions.AaveHolder memory holder = subscriptionsContract.getHolder(_user); // check if cdp is subscribed if (!subscribed) return (false, 0); // check if boost and boost allowed if (_method == Method.Boost && !holder.boostEnabled) return (false, 0); uint currRatio = getSafetyRatio(_user); if (_method == Method.Repay) { return (currRatio < holder.minRatio, currRatio); } else if (_method == Method.Boost) { return (currRatio > holder.maxRatio, currRatio); } } /// @dev After the Boost/Repay check if the ratio doesn't trigger another call /// @param _method Type of action to be called /// @param _user The actual address that owns the Aave position /// @return Boolean if the recent action preformed correctly and the ratio function ratioGoodAfter(Method _method, address _user) public view returns(bool, uint) { AaveSubscriptions.AaveHolder memory holder; holder= subscriptionsContract.getHolder(_user); uint currRatio = getSafetyRatio(_user); if (_method == Method.Repay) { return (currRatio < holder.maxRatio, currRatio); } else if (_method == Method.Boost) { return (currRatio > holder.minRatio, currRatio); } } /// @notice Calculates gas cost (in Eth) of tx /// @dev Gas price is limited to MAX_GAS_PRICE to prevent attack of draining user CDP /// @param _gasAmount Amount of gas used for the tx function calcGasCost(uint _gasAmount) public view returns (uint) { uint gasPrice = tx.gasprice <= MAX_GAS_PRICE ? tx.gasprice : MAX_GAS_PRICE; return mul(gasPrice, _gasAmount); } /******************* OWNER ONLY OPERATIONS ********************************/ /// @notice Allows owner to change gas cost for boost operation, but only up to 3 millions /// @param _gasCost New gas cost for boost method function changeBoostGasCost(uint _gasCost) public onlyOwner { require(_gasCost < 3000000); BOOST_GAS_COST = _gasCost; } /// @notice Allows owner to change gas cost for repay operation, but only up to 3 millions /// @param _gasCost New gas cost for repay method function changeRepayGasCost(uint _gasCost) public onlyOwner { require(_gasCost < 3000000); REPAY_GAS_COST = _gasCost; } /// @notice Allows owner to change max gas price /// @param _maxGasPrice New max gas price function changeMaxGasPrice(uint _maxGasPrice) public onlyOwner { require(_maxGasPrice < 500000000000); MAX_GAS_PRICE = _maxGasPrice; } /// @notice Allows owner to change gas token amount /// @param _gasTokenAmount New gas token amount /// @param _repay true if repay gas token, false if boost gas token function changeGasTokenAmount(uint _gasTokenAmount, bool _repay) public onlyOwner { if (_repay) { REPAY_GAS_TOKEN = _gasTokenAmount; } else { BOOST_GAS_TOKEN = _gasTokenAmount; } } } contract AaveMonitorProxy is AdminAuth { using SafeERC20 for ERC20; uint public CHANGE_PERIOD; address public monitor; address public newMonitor; address public lastMonitor; uint public changeRequestedTimestamp; mapping(address => bool) public allowed; event MonitorChangeInitiated(address oldMonitor, address newMonitor); event MonitorChangeCanceled(); event MonitorChangeFinished(address monitor); event MonitorChangeReverted(address monitor); // if someone who is allowed become malicious, owner can't be changed modifier onlyAllowed() { require(allowed[msg.sender] || msg.sender == owner); _; } modifier onlyMonitor() { require (msg.sender == monitor); _; } constructor(uint _changePeriod) public { CHANGE_PERIOD = _changePeriod * 1 days; } /// @notice Only monitor contract is able to call execute on users proxy /// @param _owner Address of cdp owner (users DSProxy address) /// @param _aaveSaverProxy Address of AaveSaverProxy /// @param _data Data to send to AaveSaverProxy function callExecute(address _owner, address _aaveSaverProxy, bytes memory _data) public payable onlyMonitor { // execute reverts if calling specific method fails DSProxyInterface(_owner).execute{value: msg.value}(_aaveSaverProxy, _data); // return if anything left if (address(this).balance > 0) { msg.sender.transfer(address(this).balance); } } /// @notice Allowed users are able to set Monitor contract without any waiting period first time /// @param _monitor Address of Monitor contract function setMonitor(address _monitor) public onlyAllowed { require(monitor == address(0)); monitor = _monitor; } /// @notice Allowed users are able to start procedure for changing monitor /// @dev after CHANGE_PERIOD needs to call confirmNewMonitor to actually make a change /// @param _newMonitor address of new monitor function changeMonitor(address _newMonitor) public onlyAllowed { require(changeRequestedTimestamp == 0); changeRequestedTimestamp = now; lastMonitor = monitor; newMonitor = _newMonitor; emit MonitorChangeInitiated(lastMonitor, newMonitor); } /// @notice At any point allowed users are able to cancel monitor change function cancelMonitorChange() public onlyAllowed { require(changeRequestedTimestamp > 0); changeRequestedTimestamp = 0; newMonitor = address(0); emit MonitorChangeCanceled(); } /// @notice Anyone is able to confirm new monitor after CHANGE_PERIOD if process is started function confirmNewMonitor() public onlyAllowed { require((changeRequestedTimestamp + CHANGE_PERIOD) < now); require(changeRequestedTimestamp != 0); require(newMonitor != address(0)); monitor = newMonitor; newMonitor = address(0); changeRequestedTimestamp = 0; emit MonitorChangeFinished(monitor); } /// @notice Its possible to revert monitor to last used monitor function revertMonitor() public onlyAllowed { require(lastMonitor != address(0)); monitor = lastMonitor; emit MonitorChangeReverted(monitor); } /// @notice Allowed users are able to add new allowed user /// @param _user Address of user that will be allowed function addAllowed(address _user) public onlyAllowed { allowed[_user] = true; } /// @notice Allowed users are able to remove allowed user /// @dev owner is always allowed even if someone tries to remove it from allowed mapping /// @param _user Address of allowed user function removeAllowed(address _user) public onlyAllowed { allowed[_user] = false; } function setChangePeriod(uint _periodInDays) public onlyAllowed { require(_periodInDays * 1 days > CHANGE_PERIOD); CHANGE_PERIOD = _periodInDays * 1 days; } /// @notice In case something is left in contract, owner is able to withdraw it /// @param _token address of token to withdraw balance function withdrawToken(address _token) public onlyOwner { uint balance = ERC20(_token).balanceOf(address(this)); ERC20(_token).safeTransfer(msg.sender, balance); } /// @notice In case something is left in contract, owner is able to withdraw it function withdrawEth() public onlyOwner { uint balance = address(this).balance; msg.sender.transfer(balance); } } contract AaveSubscriptions is AdminAuth { struct AaveHolder { address user; uint128 minRatio; uint128 maxRatio; uint128 optimalRatioBoost; uint128 optimalRatioRepay; bool boostEnabled; } struct SubPosition { uint arrPos; bool subscribed; } AaveHolder[] public subscribers; mapping (address => SubPosition) public subscribersPos; uint public changeIndex; event Subscribed(address indexed user); event Unsubscribed(address indexed user); event Updated(address indexed user); event ParamUpdates(address indexed user, uint128, uint128, uint128, uint128, bool); /// @dev Called by the DSProxy contract which owns the Aave position /// @notice Adds the users Aave poistion in the list of subscriptions so it can be monitored /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalBoost Ratio amount which boost should target /// @param _optimalRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled function subscribe(uint128 _minRatio, uint128 _maxRatio, uint128 _optimalBoost, uint128 _optimalRepay, bool _boostEnabled) external { // if boost is not enabled, set max ratio to max uint uint128 localMaxRatio = _boostEnabled ? _maxRatio : uint128(-1); require(checkParams(_minRatio, localMaxRatio), "Must be correct params"); SubPosition storage subInfo = subscribersPos[msg.sender]; AaveHolder memory subscription = AaveHolder({ minRatio: _minRatio, maxRatio: localMaxRatio, optimalRatioBoost: _optimalBoost, optimalRatioRepay: _optimalRepay, user: msg.sender, boostEnabled: _boostEnabled }); changeIndex++; if (subInfo.subscribed) { subscribers[subInfo.arrPos] = subscription; emit Updated(msg.sender); emit ParamUpdates(msg.sender, _minRatio, localMaxRatio, _optimalBoost, _optimalRepay, _boostEnabled); } else { subscribers.push(subscription); subInfo.arrPos = subscribers.length - 1; subInfo.subscribed = true; emit Subscribed(msg.sender); } } /// @notice Called by the users DSProxy /// @dev Owner who subscribed cancels his subscription function unsubscribe() external { _unsubscribe(msg.sender); } /// @dev Checks limit if minRatio is bigger than max /// @param _minRatio Minimum ratio, bellow which repay can be triggered /// @param _maxRatio Maximum ratio, over which boost can be triggered /// @return Returns bool if the params are correct function checkParams(uint128 _minRatio, uint128 _maxRatio) internal pure returns (bool) { if (_minRatio > _maxRatio) { return false; } return true; } /// @dev Internal method to remove a subscriber from the list /// @param _user The actual address that owns the Aave position function _unsubscribe(address _user) internal { require(subscribers.length > 0, "Must have subscribers in the list"); SubPosition storage subInfo = subscribersPos[_user]; require(subInfo.subscribed, "Must first be subscribed"); address lastOwner = subscribers[subscribers.length - 1].user; SubPosition storage subInfo2 = subscribersPos[lastOwner]; subInfo2.arrPos = subInfo.arrPos; subscribers[subInfo.arrPos] = subscribers[subscribers.length - 1]; subscribers.pop(); // remove last element and reduce arr length changeIndex++; subInfo.subscribed = false; subInfo.arrPos = 0; emit Unsubscribed(msg.sender); } /// @dev Checks if the user is subscribed /// @param _user The actual address that owns the Aave position /// @return If the user is subscribed function isSubscribed(address _user) public view returns (bool) { SubPosition storage subInfo = subscribersPos[_user]; return subInfo.subscribed; } /// @dev Returns subscribtion information about a user /// @param _user The actual address that owns the Aave position /// @return Subscription information about the user if exists function getHolder(address _user) public view returns (AaveHolder memory) { SubPosition storage subInfo = subscribersPos[_user]; return subscribers[subInfo.arrPos]; } /// @notice Helper method to return all the subscribed CDPs /// @return List of all subscribers function getSubscribers() public view returns (AaveHolder[] memory) { return subscribers; } /// @notice Helper method for the frontend, returns all the subscribed CDPs paginated /// @param _page What page of subscribers you want /// @param _perPage Number of entries per page /// @return List of all subscribers for that page function getSubscribersByPage(uint _page, uint _perPage) public view returns (AaveHolder[] memory) { AaveHolder[] memory holders = new AaveHolder[](_perPage); uint start = _page * _perPage; uint end = start + _perPage; end = (end > holders.length) ? holders.length : end; uint count = 0; for (uint i = start; i < end; i++) { holders[count] = subscribers[i]; count++; } return holders; } ////////////// ADMIN METHODS /////////////////// /// @notice Admin function to unsubscribe a position /// @param _user The actual address that owns the Aave position function unsubscribeByAdmin(address _user) public onlyOwner { SubPosition storage subInfo = subscribersPos[_user]; if (subInfo.subscribed) { _unsubscribe(_user); } } } contract AaveSubscriptionsProxy is ProxyPermission { address public constant AAVE_SUBSCRIPTION_ADDRESS = 0xe08ff7A2BADb634F0b581E675E6B3e583De086FC; address public constant AAVE_MONITOR_PROXY = 0xfA560Dba3a8D0B197cA9505A2B98120DD89209AC; /// @notice Calls subscription contract and creates a DSGuard if non existent /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalRatioBoost Ratio amount which boost should target /// @param _optimalRatioRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled function subscribe( uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled ) public { givePermission(AAVE_MONITOR_PROXY); IAaveSubscription(AAVE_SUBSCRIPTION_ADDRESS).subscribe( _minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled); } /// @notice Calls subscription contract and updated existing parameters /// @dev If subscription is non existent this will create one /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalRatioBoost Ratio amount which boost should target /// @param _optimalRatioRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled function update( uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled ) public { IAaveSubscription(AAVE_SUBSCRIPTION_ADDRESS).subscribe(_minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled); } /// @notice Calls the subscription contract to unsubscribe the caller function unsubscribe() public { removePermission(AAVE_MONITOR_PROXY); IAaveSubscription(AAVE_SUBSCRIPTION_ADDRESS).unsubscribe(); } } contract AaveImport is AaveHelper, AdminAuth { using SafeERC20 for ERC20; address public constant WETH_ADDRESS = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address public constant BASIC_PROXY = 0x9D266997bc73B27d4302E711b55FD78B5278e1De; address public constant AETH_ADDRESS = 0x3a3A65aAb0dd2A17E3F1947bA16138cd37d08c04; function callFunction( address sender, Account.Info memory account, bytes memory data ) public { ( address collateralToken, address borrowToken, uint256 ethAmount, address user, address proxy ) = abi.decode(data, (address,address,uint256,address,address)); // withdraw eth TokenInterface(WETH_ADDRESS).withdraw(ethAmount); address lendingPoolCoreAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); address aCollateralToken = ILendingPool(lendingPoolCoreAddress).getReserveATokenAddress(collateralToken); address aBorrowToken = ILendingPool(lendingPoolCoreAddress).getReserveATokenAddress(borrowToken); // deposit eth on behalf of proxy DSProxy(payable(proxy)).execute{value: ethAmount}(BASIC_PROXY, abi.encodeWithSignature("deposit(address,uint256)", ETH_ADDR, ethAmount)); // borrow needed amount to repay users borrow (,uint256 borrowAmount,,uint256 borrowRateMode,,,uint256 originationFee,,,) = ILendingPool(lendingPool).getUserReserveData(borrowToken, user); borrowAmount += originationFee; DSProxy(payable(proxy)).execute(BASIC_PROXY, abi.encodeWithSignature("borrow(address,uint256,uint256)", borrowToken, borrowAmount, borrowRateMode)); // payback on behalf of user ERC20(borrowToken).safeApprove(proxy, borrowAmount); DSProxy(payable(proxy)).execute(BASIC_PROXY, abi.encodeWithSignature("paybackOnBehalf(address,address,uint256,bool,address)", borrowToken, aBorrowToken, 0, true, user)); // pull tokens from user to proxy ERC20(aCollateralToken).safeTransferFrom(user, proxy, ERC20(aCollateralToken).balanceOf(user)); // enable as collateral DSProxy(payable(proxy)).execute(BASIC_PROXY, abi.encodeWithSignature("setUserUseReserveAsCollateralIfNeeded(address)", collateralToken)); // withdraw deposited eth DSProxy(payable(proxy)).execute(BASIC_PROXY, abi.encodeWithSignature("withdraw(address,address,uint256,bool)", ETH_ADDR, AETH_ADDRESS, ethAmount, false)); // deposit eth, get weth and return to sender TokenInterface(WETH_ADDRESS).deposit.value(address(this).balance)(); ERC20(WETH_ADDRESS).safeTransfer(proxy, ethAmount+2); } /// @dev if contract receive eth, convert it to WETH receive() external payable { // deposit eth and get weth if (msg.sender == owner) { TokenInterface(WETH_ADDRESS).deposit.value(address(this).balance)(); } } } contract AaveImportTaker is DydxFlashLoanBase, ProxyPermission { address public constant WETH_ADDR = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address payable public constant AAVE_IMPORT = 0x44e4EF23b4794699D0625657cADcB96e07820fFe; address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; address public constant PROXY_REGISTRY_ADDRESS = 0x4678f0a6958e4D2Bc4F1BAF7Bc52E8F3564f3fE4; /// @notice Starts the process to move users position 1 collateral and 1 borrow /// @dev User must send 2 wei with this transaction /// @dev User must approve AaveImport to pull _aCollateralToken /// @param _collateralToken Collateral token we are moving to DSProxy /// @param _borrowToken Borrow token we are moving to DSProxy /// @param _ethAmount ETH amount that needs to be pulled from dydx function importLoan(address _collateralToken, address _borrowToken, uint _ethAmount) public { ISoloMargin solo = ISoloMargin(SOLO_MARGIN_ADDRESS); // Get marketId from token address uint256 marketId = _getMarketIdFromTokenAddress(WETH_ADDR); // Calculate repay amount (_amount + (2 wei)) // Approve transfer from uint256 repayAmount = _getRepaymentAmountInternal(_ethAmount); ERC20(WETH_ADDR).approve(SOLO_MARGIN_ADDRESS, repayAmount); Actions.ActionArgs[] memory operations = new Actions.ActionArgs[](3); operations[0] = _getWithdrawAction(marketId, _ethAmount, AAVE_IMPORT); operations[1] = _getCallAction( abi.encode(_collateralToken, _borrowToken, _ethAmount, msg.sender, address(this)), AAVE_IMPORT ); operations[2] = _getDepositAction(marketId, repayAmount, address(this)); Account.Info[] memory accountInfos = new Account.Info[](1); accountInfos[0] = _getAccountInfo(); givePermission(AAVE_IMPORT); solo.operate(accountInfos, operations); removePermission(AAVE_IMPORT); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "AaveImport", abi.encode(_collateralToken, _borrowToken)); } } contract CompoundBasicProxy is GasBurner { address public constant ETH_ADDR = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant COMPTROLLER_ADDR = 0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B; using SafeERC20 for ERC20; /// @notice User deposits tokens to the Compound protocol /// @dev User needs to approve the DSProxy to pull the _tokenAddr tokens /// @param _tokenAddr The address of the token to be deposited /// @param _cTokenAddr CTokens to be deposited /// @param _amount Amount of tokens to be deposited /// @param _inMarket True if the token is already in market for that address function deposit(address _tokenAddr, address _cTokenAddr, uint _amount, bool _inMarket) public burnGas(5) payable { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(this), _amount); } approveToken(_tokenAddr, _cTokenAddr); if (!_inMarket) { enterMarket(_cTokenAddr); } if (_tokenAddr != ETH_ADDR) { require(CTokenInterface(_cTokenAddr).mint(_amount) == 0); } else { CEtherInterface(_cTokenAddr).mint{value: msg.value}(); // reverts on fail } } /// @notice User withdraws tokens to the Compound protocol /// @param _tokenAddr The address of the token to be withdrawn /// @param _cTokenAddr CTokens to be withdrawn /// @param _amount Amount of tokens to be withdrawn /// @param _isCAmount If true _amount is cTokens if falls _amount is underlying tokens function withdraw(address _tokenAddr, address _cTokenAddr, uint _amount, bool _isCAmount) public burnGas(5) { if (_isCAmount) { require(CTokenInterface(_cTokenAddr).redeem(_amount) == 0); } else { require(CTokenInterface(_cTokenAddr).redeemUnderlying(_amount) == 0); } // withdraw funds to msg.sender if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransfer(msg.sender, ERC20(_tokenAddr).balanceOf(address(this))); } else { msg.sender.transfer(address(this).balance); } } /// @notice User borrows tokens to the Compound protocol /// @param _tokenAddr The address of the token to be borrowed /// @param _cTokenAddr CTokens to be borrowed /// @param _amount Amount of tokens to be borrowed /// @param _inMarket True if the token is already in market for that address function borrow(address _tokenAddr, address _cTokenAddr, uint _amount, bool _inMarket) public burnGas(8) { if (!_inMarket) { enterMarket(_cTokenAddr); } require(CTokenInterface(_cTokenAddr).borrow(_amount) == 0); // withdraw funds to msg.sender if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransfer(msg.sender, ERC20(_tokenAddr).balanceOf(address(this))); } else { msg.sender.transfer(address(this).balance); } } /// @dev User needs to approve the DSProxy to pull the _tokenAddr tokens /// @notice User paybacks tokens to the Compound protocol /// @param _tokenAddr The address of the token to be paybacked /// @param _cTokenAddr CTokens to be paybacked /// @param _amount Amount of tokens to be payedback /// @param _wholeDebt If true the _amount will be set to the whole amount of the debt function payback(address _tokenAddr, address _cTokenAddr, uint _amount, bool _wholeDebt) public burnGas(5) payable { approveToken(_tokenAddr, _cTokenAddr); if (_wholeDebt) { _amount = CTokenInterface(_cTokenAddr).borrowBalanceCurrent(address(this)); } if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(this), _amount); require(CTokenInterface(_cTokenAddr).repayBorrow(_amount) == 0); } else { CEtherInterface(_cTokenAddr).repayBorrow{value: msg.value}(); msg.sender.transfer(address(this).balance); // send back the extra eth } } /// @notice Helper method to withdraw tokens from the DSProxy /// @param _tokenAddr Address of the token to be withdrawn function withdrawTokens(address _tokenAddr) public { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransfer(msg.sender, ERC20(_tokenAddr).balanceOf(address(this))); } else { msg.sender.transfer(address(this).balance); } } /// @notice Enters the Compound market so it can be deposited/borrowed /// @param _cTokenAddr CToken address of the token function enterMarket(address _cTokenAddr) public { address[] memory markets = new address[](1); markets[0] = _cTokenAddr; ComptrollerInterface(COMPTROLLER_ADDR).enterMarkets(markets); } /// @notice Exits the Compound market so it can't be deposited/borrowed /// @param _cTokenAddr CToken address of the token function exitMarket(address _cTokenAddr) public { ComptrollerInterface(COMPTROLLER_ADDR).exitMarket(_cTokenAddr); } /// @notice Approves CToken contract to pull underlying tokens from the DSProxy /// @param _tokenAddr Token we are trying to approve /// @param _cTokenAddr Address which will gain the approval function approveToken(address _tokenAddr, address _cTokenAddr) internal { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeApprove(_cTokenAddr, 0); ERC20(_tokenAddr).safeApprove(_cTokenAddr, uint(-1)); } } } contract CompoundSafetyRatio is Exponential, DSMath { // solhint-disable-next-line const-name-snakecase ComptrollerInterface public constant comp = ComptrollerInterface(0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B); /// @notice Calcualted the ratio of debt / adjusted collateral /// @param _user Address of the user function getSafetyRatio(address _user) public view returns (uint) { // For each asset the account is in address[] memory assets = comp.getAssetsIn(_user); address oracleAddr = comp.oracle(); uint sumCollateral = 0; uint sumBorrow = 0; for (uint i = 0; i < assets.length; i++) { address asset = assets[i]; (, uint cTokenBalance, uint borrowBalance, uint exchangeRateMantissa) = CTokenInterface(asset).getAccountSnapshot(_user); Exp memory oraclePrice; if (cTokenBalance != 0 || borrowBalance != 0) { oraclePrice = Exp({mantissa: CompoundOracleInterface(oracleAddr).getUnderlyingPrice(asset)}); } // Sum up collateral in Usd if (cTokenBalance != 0) { (, uint collFactorMantissa) = comp.markets(address(asset)); Exp memory collateralFactor = Exp({mantissa: collFactorMantissa}); Exp memory exchangeRate = Exp({mantissa: exchangeRateMantissa}); (, Exp memory tokensToUsd) = mulExp3(collateralFactor, exchangeRate, oraclePrice); (, sumCollateral) = mulScalarTruncateAddUInt(tokensToUsd, cTokenBalance, sumCollateral); } // Sum up debt in Usd if (borrowBalance != 0) { (, sumBorrow) = mulScalarTruncateAddUInt(oraclePrice, borrowBalance, sumBorrow); } } if (sumBorrow == 0) return uint(-1); uint borrowPowerUsed = (sumBorrow * 10**18) / sumCollateral; return wdiv(1e18, borrowPowerUsed); } } contract CompoundMonitor is AdminAuth, DSMath, CompoundSafetyRatio, GasBurner { using SafeERC20 for ERC20; enum Method { Boost, Repay } uint public REPAY_GAS_TOKEN = 25; uint public BOOST_GAS_TOKEN = 20; uint constant public MAX_GAS_PRICE = 80000000000; // 80 gwei uint public REPAY_GAS_COST = 2200000; uint public BOOST_GAS_COST = 1700000; address public constant GAS_TOKEN_INTERFACE_ADDRESS = 0x0000000000b3F879cb30FE243b4Dfee438691c04; address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; address public constant BOT_REGISTRY_ADDRESS = 0x637726f8b08a7ABE3aE3aCaB01A80E2d8ddeF77B; CompoundMonitorProxy public compoundMonitorProxy; CompoundSubscriptions public subscriptionsContract; address public compoundFlashLoanTakerAddress; DefisaverLogger public logger = DefisaverLogger(DEFISAVER_LOGGER); modifier onlyApproved() { require(BotRegistry(BOT_REGISTRY_ADDRESS).botList(msg.sender), "Not auth bot"); _; } /// @param _compoundMonitorProxy Proxy contracts that actually is authorized to call DSProxy /// @param _subscriptions Subscriptions contract for Compound positions /// @param _compoundFlashLoanTaker Contract that actually performs Repay/Boost constructor(address _compoundMonitorProxy, address _subscriptions, address _compoundFlashLoanTaker) public { compoundMonitorProxy = CompoundMonitorProxy(_compoundMonitorProxy); subscriptionsContract = CompoundSubscriptions(_subscriptions); compoundFlashLoanTakerAddress = _compoundFlashLoanTaker; } /// @notice Bots call this method to repay for user when conditions are met /// @dev If the contract ownes gas token it will try and use it for gas price reduction /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress, exchangeAddress] /// @param _user The actual address that owns the Compound position function repayFor( SaverExchangeCore.ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress address _user ) public payable onlyApproved burnGas(REPAY_GAS_TOKEN) { (bool isAllowed, uint ratioBefore) = canCall(Method.Repay, _user); require(isAllowed); // check if conditions are met uint256 gasCost = calcGasCost(REPAY_GAS_COST); compoundMonitorProxy.callExecute{value: msg.value}( _user, compoundFlashLoanTakerAddress, abi.encodeWithSignature( "repayWithLoan((address,address,uint256,uint256,uint256,address,address,bytes,uint256),address[2],uint256)", _exData, _cAddresses, gasCost ) ); (bool isGoodRatio, uint ratioAfter) = ratioGoodAfter(Method.Repay, _user); require(isGoodRatio); // check if the after result of the actions is good returnEth(); logger.Log(address(this), _user, "AutomaticCompoundRepay", abi.encode(ratioBefore, ratioAfter)); } /// @notice Bots call this method to boost for user when conditions are met /// @dev If the contract ownes gas token it will try and use it for gas price reduction /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress, exchangeAddress] /// @param _user The actual address that owns the Compound position function boostFor( SaverExchangeCore.ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress address _user ) public payable onlyApproved burnGas(BOOST_GAS_TOKEN) { (bool isAllowed, uint ratioBefore) = canCall(Method.Boost, _user); require(isAllowed); // check if conditions are met uint256 gasCost = calcGasCost(BOOST_GAS_COST); compoundMonitorProxy.callExecute{value: msg.value}( _user, compoundFlashLoanTakerAddress, abi.encodeWithSignature( "boostWithLoan((address,address,uint256,uint256,uint256,address,address,bytes,uint256),address[2],uint256)", _exData, _cAddresses, gasCost ) ); (bool isGoodRatio, uint ratioAfter) = ratioGoodAfter(Method.Boost, _user); require(isGoodRatio); // check if the after result of the actions is good returnEth(); logger.Log(address(this), _user, "AutomaticCompoundBoost", abi.encode(ratioBefore, ratioAfter)); } /******************* INTERNAL METHODS ********************************/ function returnEth() internal { // return if some eth left if (address(this).balance > 0) { msg.sender.transfer(address(this).balance); } } /******************* STATIC METHODS ********************************/ /// @notice Checks if Boost/Repay could be triggered for the CDP /// @dev Called by MCDMonitor to enforce the min/max check /// @param _method Type of action to be called /// @param _user The actual address that owns the Compound position /// @return Boolean if it can be called and the ratio function canCall(Method _method, address _user) public view returns(bool, uint) { bool subscribed = subscriptionsContract.isSubscribed(_user); CompoundSubscriptions.CompoundHolder memory holder = subscriptionsContract.getHolder(_user); // check if cdp is subscribed if (!subscribed) return (false, 0); // check if boost and boost allowed if (_method == Method.Boost && !holder.boostEnabled) return (false, 0); uint currRatio = getSafetyRatio(_user); if (_method == Method.Repay) { return (currRatio < holder.minRatio, currRatio); } else if (_method == Method.Boost) { return (currRatio > holder.maxRatio, currRatio); } } /// @dev After the Boost/Repay check if the ratio doesn't trigger another call /// @param _method Type of action to be called /// @param _user The actual address that owns the Compound position /// @return Boolean if the recent action preformed correctly and the ratio function ratioGoodAfter(Method _method, address _user) public view returns(bool, uint) { CompoundSubscriptions.CompoundHolder memory holder; holder= subscriptionsContract.getHolder(_user); uint currRatio = getSafetyRatio(_user); if (_method == Method.Repay) { return (currRatio < holder.maxRatio, currRatio); } else if (_method == Method.Boost) { return (currRatio > holder.minRatio, currRatio); } } /// @notice Calculates gas cost (in Eth) of tx /// @dev Gas price is limited to MAX_GAS_PRICE to prevent attack of draining user CDP /// @param _gasAmount Amount of gas used for the tx function calcGasCost(uint _gasAmount) public view returns (uint) { uint gasPrice = tx.gasprice <= MAX_GAS_PRICE ? tx.gasprice : MAX_GAS_PRICE; return mul(gasPrice, _gasAmount); } /******************* OWNER ONLY OPERATIONS ********************************/ /// @notice Allows owner to change gas cost for boost operation, but only up to 3 millions /// @param _gasCost New gas cost for boost method function changeBoostGasCost(uint _gasCost) public onlyOwner { require(_gasCost < 3000000); BOOST_GAS_COST = _gasCost; } /// @notice Allows owner to change gas cost for repay operation, but only up to 3 millions /// @param _gasCost New gas cost for repay method function changeRepayGasCost(uint _gasCost) public onlyOwner { require(_gasCost < 3000000); REPAY_GAS_COST = _gasCost; } /// @notice If any tokens gets stuck in the contract owner can withdraw it /// @param _tokenAddress Address of the ERC20 token /// @param _to Address of the receiver /// @param _amount The amount to be sent function transferERC20(address _tokenAddress, address _to, uint _amount) public onlyOwner { ERC20(_tokenAddress).safeTransfer(_to, _amount); } /// @notice If any Eth gets stuck in the contract owner can withdraw it /// @param _to Address of the receiver /// @param _amount The amount to be sent function transferEth(address payable _to, uint _amount) public onlyOwner { _to.transfer(_amount); } } contract CompoundSaverHelper is DSMath, Exponential { using SafeERC20 for ERC20; address payable public constant WALLET_ADDR = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; address public constant DISCOUNT_ADDR = 0x1b14E8D511c9A4395425314f849bD737BAF8208F; uint public constant MANUAL_SERVICE_FEE = 400; // 0.25% Fee uint public constant AUTOMATIC_SERVICE_FEE = 333; // 0.3% Fee address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant CETH_ADDRESS = 0x4Ddc2D193948926D02f9B1fE9e1daa0718270ED5; address public constant COMPTROLLER = 0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B; address public constant COMPOUND_LOGGER = 0x3DD0CDf5fFA28C6847B4B276e2fD256046a44bb7; address public constant BOT_REGISTRY_ADDRESS = 0x637726f8b08a7ABE3aE3aCaB01A80E2d8ddeF77B; /// @notice Helper method to payback the Compound debt /// @dev If amount is bigger it will repay the whole debt and send the extra to the _user /// @param _amount Amount of tokens we want to repay /// @param _cBorrowToken Ctoken address we are repaying /// @param _borrowToken Token address we are repaying /// @param _user Owner of the compound position we are paying back function paybackDebt(uint _amount, address _cBorrowToken, address _borrowToken, address payable _user) internal { uint wholeDebt = CTokenInterface(_cBorrowToken).borrowBalanceCurrent(address(this)); if (_amount > wholeDebt) { if (_borrowToken == ETH_ADDRESS) { _user.transfer((_amount - wholeDebt)); } else { ERC20(_borrowToken).safeTransfer(_user, (_amount - wholeDebt)); } _amount = wholeDebt; } approveCToken(_borrowToken, _cBorrowToken); if (_borrowToken == ETH_ADDRESS) { CEtherInterface(_cBorrowToken).repayBorrow{value: _amount}(); } else { require(CTokenInterface(_cBorrowToken).repayBorrow(_amount) == 0); } } /// @notice Calculates the fee amount /// @param _amount Amount that is converted /// @param _user Actuall user addr not DSProxy /// @param _gasCost Ether amount of gas we are spending for tx /// @param _cTokenAddr CToken addr. of token we are getting for the fee /// @return feeAmount The amount we took for the fee function getFee(uint _amount, address _user, uint _gasCost, address _cTokenAddr) internal returns (uint feeAmount) { uint fee = MANUAL_SERVICE_FEE; if (BotRegistry(BOT_REGISTRY_ADDRESS).botList(tx.origin)) { fee = AUTOMATIC_SERVICE_FEE; } address tokenAddr = getUnderlyingAddr(_cTokenAddr); if (Discount(DISCOUNT_ADDR).isCustomFeeSet(_user)) { fee = Discount(DISCOUNT_ADDR).getCustomServiceFee(_user); } feeAmount = (fee == 0) ? 0 : (_amount / fee); if (_gasCost != 0) { address oracle = ComptrollerInterface(COMPTROLLER).oracle(); uint usdTokenPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(_cTokenAddr); uint ethPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(CETH_ADDRESS); uint tokenPriceInEth = wdiv(usdTokenPrice, ethPrice); _gasCost = wdiv(_gasCost, tokenPriceInEth); feeAmount = add(feeAmount, _gasCost); } // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } if (tokenAddr == ETH_ADDRESS) { WALLET_ADDR.transfer(feeAmount); } else { ERC20(tokenAddr).safeTransfer(WALLET_ADDR, feeAmount); } } /// @notice Calculates the gas cost of transaction and send it to wallet /// @param _amount Amount that is converted /// @param _gasCost Ether amount of gas we are spending for tx /// @param _cTokenAddr CToken addr. of token we are getting for the fee /// @return feeAmount The amount we took for the fee function getGasCost(uint _amount, uint _gasCost, address _cTokenAddr) internal returns (uint feeAmount) { address tokenAddr = getUnderlyingAddr(_cTokenAddr); if (_gasCost != 0) { address oracle = ComptrollerInterface(COMPTROLLER).oracle(); uint usdTokenPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(_cTokenAddr); uint ethPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(CETH_ADDRESS); uint tokenPriceInEth = wdiv(usdTokenPrice, ethPrice); feeAmount = wdiv(_gasCost, tokenPriceInEth); } // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } if (tokenAddr == ETH_ADDRESS) { WALLET_ADDR.transfer(feeAmount); } else { ERC20(tokenAddr).safeTransfer(WALLET_ADDR, feeAmount); } } /// @notice Enters the market for the collatera and borrow tokens /// @param _cTokenAddrColl Collateral address we are entering the market in /// @param _cTokenAddrBorrow Borrow address we are entering the market in function enterMarket(address _cTokenAddrColl, address _cTokenAddrBorrow) internal { address[] memory markets = new address[](2); markets[0] = _cTokenAddrColl; markets[1] = _cTokenAddrBorrow; ComptrollerInterface(COMPTROLLER).enterMarkets(markets); } /// @notice Approves CToken contract to pull underlying tokens from the DSProxy /// @param _tokenAddr Token we are trying to approve /// @param _cTokenAddr Address which will gain the approval function approveCToken(address _tokenAddr, address _cTokenAddr) internal { if (_tokenAddr != ETH_ADDRESS) { ERC20(_tokenAddr).safeApprove(_cTokenAddr, uint(-1)); } } /// @notice Returns the underlying address of the cToken asset /// @param _cTokenAddress cToken address /// @return Token address of the cToken specified function getUnderlyingAddr(address _cTokenAddress) internal returns (address) { if (_cTokenAddress == CETH_ADDRESS) { return ETH_ADDRESS; } else { return CTokenInterface(_cTokenAddress).underlying(); } } /// @notice Returns the owner of the DSProxy that called the contract function getUserAddress() internal view returns (address) { DSProxy proxy = DSProxy(uint160(address(this))); return proxy.owner(); } /// @notice Returns the maximum amount of collateral available to withdraw /// @dev Due to rounding errors the result is - 1% wei from the exact amount /// @param _cCollAddress Collateral we are getting the max value of /// @param _account Users account /// @return Returns the max. collateral amount in that token function getMaxCollateral(address _cCollAddress, address _account) public returns (uint) { (, uint liquidityInUsd, ) = ComptrollerInterface(COMPTROLLER).getAccountLiquidity(_account); uint usersBalance = CTokenInterface(_cCollAddress).balanceOfUnderlying(_account); address oracle = ComptrollerInterface(COMPTROLLER).oracle(); if (liquidityInUsd == 0) return usersBalance; CTokenInterface(_cCollAddress).accrueInterest(); (, uint collFactorMantissa) = ComptrollerInterface(COMPTROLLER).markets(_cCollAddress); Exp memory collateralFactor = Exp({mantissa: collFactorMantissa}); (, uint tokensToUsd) = divScalarByExpTruncate(liquidityInUsd, collateralFactor); uint usdPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(_cCollAddress); uint liqInToken = wdiv(tokensToUsd, usdPrice); if (liqInToken > usersBalance) return usersBalance; return sub(liqInToken, (liqInToken / 100)); // cut off 1% due to rounding issues } /// @notice Returns the maximum amount of borrow amount available /// @dev Due to rounding errors the result is - 1% wei from the exact amount /// @param _cBorrowAddress Borrow token we are getting the max value of /// @param _account Users account /// @return Returns the max. borrow amount in that token function getMaxBorrow(address _cBorrowAddress, address _account) public returns (uint) { (, uint liquidityInUsd, ) = ComptrollerInterface(COMPTROLLER).getAccountLiquidity(_account); address oracle = ComptrollerInterface(COMPTROLLER).oracle(); CTokenInterface(_cBorrowAddress).accrueInterest(); uint usdPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(_cBorrowAddress); uint liquidityInToken = wdiv(liquidityInUsd, usdPrice); return sub(liquidityInToken, (liquidityInToken / 100)); // cut off 1% due to rounding issues } } contract CompoundImportFlashLoan is FlashLoanReceiverBase { using SafeERC20 for ERC20; ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); address public constant COMPOUND_BORROW_PROXY = 0xb7EDC39bE76107e2Cc645f0f6a3D164f5e173Ee2; address public owner; constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public { owner = msg.sender; } /// @notice Called by Aave when sending back the FL amount /// @param _reserve The address of the borrowed token /// @param _amount Amount of FL tokens received /// @param _fee FL Aave fee /// @param _params The params that are sent from the original FL caller contract function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { ( address cCollateralToken, address cBorrowToken, address user, address proxy ) = abi.decode(_params, (address,address,address,address)); // approve FL tokens so we can repay them ERC20(_reserve).safeApprove(cBorrowToken, uint(-1)); // repay compound debt require(CTokenInterface(cBorrowToken).repayBorrowBehalf(user, uint(-1)) == 0, "Repay borrow behalf fail"); // transfer cTokens to proxy uint cTokenBalance = CTokenInterface(cCollateralToken).balanceOf(user); require(CTokenInterface(cCollateralToken).transferFrom(user, proxy, cTokenBalance)); // borrow bytes memory proxyData = getProxyData(cCollateralToken, cBorrowToken, _reserve, (_amount + _fee)); DSProxyInterface(proxy).execute(COMPOUND_BORROW_PROXY, proxyData); // Repay the loan with the money DSProxy sent back transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); } /// @notice Formats function data call so we can call it through DSProxy /// @param _cCollToken CToken address of collateral /// @param _cBorrowToken CToken address we will borrow /// @param _borrowToken Token address we will borrow /// @param _amount Amount that will be borrowed /// @return proxyData Formated function call data function getProxyData(address _cCollToken, address _cBorrowToken, address _borrowToken, uint _amount) internal pure returns (bytes memory proxyData) { proxyData = abi.encodeWithSignature( "borrow(address,address,address,uint256)", _cCollToken, _cBorrowToken, _borrowToken, _amount); } function withdrawStuckFunds(address _tokenAddr, uint _amount) public { require(owner == msg.sender, "Must be owner"); if (_tokenAddr == 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE) { msg.sender.transfer(_amount); } else { ERC20(_tokenAddr).safeTransfer(owner, _amount); } } } contract CompoundImportTaker is CompoundSaverHelper, ProxyPermission, GasBurner { ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); address payable public constant COMPOUND_IMPORT_FLASH_LOAN = 0x0a9238e14d5A20CDb03811B12D1984587C3CE9a0; address public constant PROXY_REGISTRY_ADDRESS = 0x4678f0a6958e4D2Bc4F1BAF7Bc52E8F3564f3fE4; DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); /// @notice Starts the process to move users position 1 collateral and 1 borrow /// @dev User must approve COMPOUND_IMPORT_FLASH_LOAN to pull _cCollateralToken /// @param _cCollateralToken Collateral we are moving to DSProxy /// @param _cBorrowToken Borrow token we are moving to DSProxy function importLoan(address _cCollateralToken, address _cBorrowToken) external burnGas(20) { address proxy = getProxy(); uint loanAmount = CTokenInterface(_cBorrowToken).borrowBalanceCurrent(msg.sender); bytes memory paramsData = abi.encode(_cCollateralToken, _cBorrowToken, msg.sender, proxy); givePermission(COMPOUND_IMPORT_FLASH_LOAN); lendingPool.flashLoan(COMPOUND_IMPORT_FLASH_LOAN, getUnderlyingAddr(_cBorrowToken), loanAmount, paramsData); removePermission(COMPOUND_IMPORT_FLASH_LOAN); logger.Log(address(this), msg.sender, "CompoundImport", abi.encode(loanAmount, 0, _cCollateralToken)); } /// @notice Gets proxy address, if user doesn't has DSProxy build it /// @return proxy DsProxy address function getProxy() internal returns (address proxy) { proxy = ProxyRegistryInterface(PROXY_REGISTRY_ADDRESS).proxies(msg.sender); if (proxy == address(0)) { proxy = ProxyRegistryInterface(PROXY_REGISTRY_ADDRESS).build(msg.sender); } } } contract SaverExchangeCore is SaverExchangeHelper, DSMath { // first is empty to keep the legacy order in place enum ExchangeType { _, OASIS, KYBER, UNISWAP, ZEROX } enum ActionType { SELL, BUY } struct ExchangeData { address srcAddr; address destAddr; uint srcAmount; uint destAmount; uint minPrice; address wrapper; address exchangeAddr; bytes callData; uint256 price0x; } /// @notice Internal method that preforms a sell on 0x/on-chain /// @dev Usefull for other DFS contract to integrate for exchanging /// @param exData Exchange data struct /// @return (address, uint) Address of the wrapper used and destAmount function _sell(ExchangeData memory exData) internal returns (address, uint) { address wrapper; uint swapedTokens; bool success; uint tokensLeft = exData.srcAmount; // if selling eth, convert to weth if (exData.srcAddr == KYBER_ETH_ADDRESS) { exData.srcAddr = ethToWethAddr(exData.srcAddr); TokenInterface(WETH_ADDRESS).deposit.value(exData.srcAmount)(); } // Try 0x first and then fallback on specific wrapper if (exData.price0x > 0) { approve0xProxy(exData.srcAddr, exData.srcAmount); uint ethAmount = exData.srcAddr == WETH_ADDRESS ? msg.value - exData.srcAmount : msg.value; (success, swapedTokens, tokensLeft) = takeOrder(exData, ethAmount, ActionType.SELL); if (success) { wrapper = exData.exchangeAddr; } } // fallback to desired wrapper if 0x failed if (!success) { swapedTokens = saverSwap(exData, ActionType.SELL); wrapper = exData.wrapper; } require(getBalance(exData.destAddr) >= wmul(exData.minPrice, exData.srcAmount), "Final amount isn't correct"); // if anything is left in weth, pull it to user as eth if (getBalance(WETH_ADDRESS) > 0) { TokenInterface(WETH_ADDRESS).withdraw( TokenInterface(WETH_ADDRESS).balanceOf(address(this)) ); } return (wrapper, swapedTokens); } /// @notice Internal method that preforms a buy on 0x/on-chain /// @dev Usefull for other DFS contract to integrate for exchanging /// @param exData Exchange data struct /// @return (address, uint) Address of the wrapper used and srcAmount function _buy(ExchangeData memory exData) internal returns (address, uint) { address wrapper; uint swapedTokens; bool success; require(exData.destAmount != 0, "Dest amount must be specified"); // if selling eth, convert to weth if (exData.srcAddr == KYBER_ETH_ADDRESS) { exData.srcAddr = ethToWethAddr(exData.srcAddr); TokenInterface(WETH_ADDRESS).deposit.value(exData.srcAmount)(); } if (exData.price0x > 0) { approve0xProxy(exData.srcAddr, exData.srcAmount); uint ethAmount = exData.srcAddr == WETH_ADDRESS ? msg.value - exData.srcAmount : msg.value; (success, swapedTokens,) = takeOrder(exData, ethAmount, ActionType.BUY); if (success) { wrapper = exData.exchangeAddr; } } // fallback to desired wrapper if 0x failed if (!success) { swapedTokens = saverSwap(exData, ActionType.BUY); wrapper = exData.wrapper; } require(getBalance(exData.destAddr) >= exData.destAmount, "Final amount isn't correct"); // if anything is left in weth, pull it to user as eth if (getBalance(WETH_ADDRESS) > 0) { TokenInterface(WETH_ADDRESS).withdraw( TokenInterface(WETH_ADDRESS).balanceOf(address(this)) ); } return (wrapper, getBalance(exData.destAddr)); } /// @notice Takes order from 0x and returns bool indicating if it is successful /// @param _exData Exchange data /// @param _ethAmount Ether fee needed for 0x order function takeOrder( ExchangeData memory _exData, uint256 _ethAmount, ActionType _type ) private returns (bool success, uint256, uint256) { // write in the exact amount we are selling/buing in an order if (_type == ActionType.SELL) { writeUint256(_exData.callData, 36, _exData.srcAmount); } else { writeUint256(_exData.callData, 36, _exData.destAmount); } if (ZrxAllowlist(ZRX_ALLOWLIST_ADDR).isNonPayableAddr(_exData.exchangeAddr)) { _ethAmount = 0; } uint256 tokensBefore = getBalance(_exData.destAddr); if (ZrxAllowlist(ZRX_ALLOWLIST_ADDR).isZrxAddr(_exData.exchangeAddr)) { (success, ) = _exData.exchangeAddr.call{value: _ethAmount}(_exData.callData); } else { success = false; } uint256 tokensSwaped = 0; uint256 tokensLeft = _exData.srcAmount; if (success) { // check to see if any _src tokens are left over after exchange tokensLeft = getBalance(_exData.srcAddr); // convert weth -> eth if needed if (_exData.destAddr == KYBER_ETH_ADDRESS) { TokenInterface(WETH_ADDRESS).withdraw( TokenInterface(WETH_ADDRESS).balanceOf(address(this)) ); } // get the current balance of the swaped tokens tokensSwaped = getBalance(_exData.destAddr) - tokensBefore; } return (success, tokensSwaped, tokensLeft); } /// @notice Calls wraper contract for exchage to preform an on-chain swap /// @param _exData Exchange data struct /// @param _type Type of action SELL|BUY /// @return swapedTokens For Sell that the destAmount, for Buy thats the srcAmount function saverSwap(ExchangeData memory _exData, ActionType _type) internal returns (uint swapedTokens) { require(SaverExchangeRegistry(SAVER_EXCHANGE_REGISTRY).isWrapper(_exData.wrapper), "Wrapper is not valid"); uint ethValue = 0; ERC20(_exData.srcAddr).safeTransfer(_exData.wrapper, _exData.srcAmount); if (_type == ActionType.SELL) { swapedTokens = ExchangeInterfaceV2(_exData.wrapper). sell{value: ethValue}(_exData.srcAddr, _exData.destAddr, _exData.srcAmount); } else { swapedTokens = ExchangeInterfaceV2(_exData.wrapper). buy{value: ethValue}(_exData.srcAddr, _exData.destAddr, _exData.destAmount); } } function writeUint256(bytes memory _b, uint256 _index, uint _input) internal pure { if (_b.length < _index + 32) { revert("Incorrent lengt while writting bytes32"); } bytes32 input = bytes32(_input); _index += 32; // Read the bytes32 from array memory assembly { mstore(add(_b, _index), input) } } /// @notice Converts Kybers Eth address -> Weth /// @param _src Input address function ethToWethAddr(address _src) internal pure returns (address) { return _src == KYBER_ETH_ADDRESS ? WETH_ADDRESS : _src; } function packExchangeData(ExchangeData memory _exData) public pure returns(bytes memory) { // splitting in two different bytes and encoding all because of stack too deep in decoding part bytes memory part1 = abi.encode( _exData.srcAddr, _exData.destAddr, _exData.srcAmount, _exData.destAmount ); bytes memory part2 = abi.encode( _exData.minPrice, _exData.wrapper, _exData.exchangeAddr, _exData.callData, _exData.price0x ); return abi.encode(part1, part2); } function unpackExchangeData(bytes memory _data) public pure returns(ExchangeData memory _exData) { ( bytes memory part1, bytes memory part2 ) = abi.decode(_data, (bytes,bytes)); ( _exData.srcAddr, _exData.destAddr, _exData.srcAmount, _exData.destAmount ) = abi.decode(part1, (address,address,uint256,uint256)); ( _exData.minPrice, _exData.wrapper, _exData.exchangeAddr, _exData.callData, _exData.price0x ) = abi.decode(part2, (uint256,address,address,bytes,uint256)); } // solhint-disable-next-line no-empty-blocks receive() external virtual payable {} } contract KyberWrapper is DSMath, ExchangeInterfaceV2, AdminAuth { address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant KYBER_INTERFACE = 0x9AAb3f75489902f3a48495025729a0AF77d4b11e; address payable public constant WALLET_ID = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; using SafeERC20 for ERC20; /// @notice Sells a _srcAmount of tokens at Kyber /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Destination amount function sell(address _srcAddr, address _destAddr, uint _srcAmount) external override payable returns (uint) { ERC20 srcToken = ERC20(_srcAddr); ERC20 destToken = ERC20(_destAddr); KyberNetworkProxyInterface kyberNetworkProxy = KyberNetworkProxyInterface(KYBER_INTERFACE); if (_srcAddr != KYBER_ETH_ADDRESS) { srcToken.safeApprove(address(kyberNetworkProxy), _srcAmount); } uint destAmount = kyberNetworkProxy.trade{value: msg.value}( srcToken, _srcAmount, destToken, msg.sender, uint(-1), 0, WALLET_ID ); return destAmount; } /// @notice Buys a _destAmount of tokens at Kyber /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint srcAmount function buy(address _srcAddr, address _destAddr, uint _destAmount) external override payable returns(uint) { ERC20 srcToken = ERC20(_srcAddr); ERC20 destToken = ERC20(_destAddr); uint srcAmount = 0; if (_srcAddr != KYBER_ETH_ADDRESS) { srcAmount = srcToken.balanceOf(address(this)); } else { srcAmount = msg.value; } KyberNetworkProxyInterface kyberNetworkProxy = KyberNetworkProxyInterface(KYBER_INTERFACE); if (_srcAddr != KYBER_ETH_ADDRESS) { srcToken.safeApprove(address(kyberNetworkProxy), srcAmount); } uint destAmount = kyberNetworkProxy.trade{value: msg.value}( srcToken, srcAmount, destToken, msg.sender, _destAmount, 0, WALLET_ID ); require(destAmount == _destAmount, "Wrong dest amount"); uint srcAmountAfter = 0; if (_srcAddr != KYBER_ETH_ADDRESS) { srcAmountAfter = srcToken.balanceOf(address(this)); } else { srcAmountAfter = address(this).balance; } // Send the leftover from the source token back sendLeftOver(_srcAddr); return (srcAmount - srcAmountAfter); } /// @notice Return a rate for which we can sell an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return rate Rate function getSellRate(address _srcAddr, address _destAddr, uint _srcAmount) public override view returns (uint rate) { (rate, ) = KyberNetworkProxyInterface(KYBER_INTERFACE) .getExpectedRate(ERC20(_srcAddr), ERC20(_destAddr), _srcAmount); // multiply with decimal difference in src token rate = rate * (10**(18 - getDecimals(_srcAddr))); // divide with decimal difference in dest token rate = rate / (10**(18 - getDecimals(_destAddr))); } /// @notice Return a rate for which we can buy an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return rate Rate function getBuyRate(address _srcAddr, address _destAddr, uint _destAmount) public override view returns (uint rate) { uint256 srcRate = getSellRate(_srcAddr, _destAddr, _destAmount); uint256 srcAmount = wmul(_destAmount, srcRate); rate = getSellRate(_destAddr, _srcAddr, srcAmount); // increase rate by 3% too account for inaccuracy between sell/buy conversion rate = rate + (rate / 30); } /// @notice Send any leftover tokens, we use to clear out srcTokens after buy /// @param _srcAddr Source token address function sendLeftOver(address _srcAddr) internal { msg.sender.transfer(address(this).balance); if (_srcAddr != KYBER_ETH_ADDRESS) { ERC20(_srcAddr).safeTransfer(msg.sender, ERC20(_srcAddr).balanceOf(address(this))); } } receive() payable external {} function getDecimals(address _token) internal view returns (uint256) { if (_token == KYBER_ETH_ADDRESS) return 18; return ERC20(_token).decimals(); } } contract OasisTradeWrapper is DSMath, ExchangeInterfaceV2, AdminAuth { using SafeERC20 for ERC20; address public constant OTC_ADDRESS = 0x794e6e91555438aFc3ccF1c5076A74F42133d08D; address public constant WETH_ADDRESS = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; /// @notice Sells a _srcAmount of tokens at Oasis /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Destination amount function sell(address _srcAddr, address _destAddr, uint _srcAmount) external override payable returns (uint) { address srcAddr = ethToWethAddr(_srcAddr); address destAddr = ethToWethAddr(_destAddr); ERC20(srcAddr).safeApprove(OTC_ADDRESS, _srcAmount); uint destAmount = OasisInterface(OTC_ADDRESS).sellAllAmount(srcAddr, _srcAmount, destAddr, 0); // convert weth -> eth and send back if (destAddr == WETH_ADDRESS) { TokenInterface(WETH_ADDRESS).withdraw(destAmount); msg.sender.transfer(destAmount); } else { ERC20(destAddr).safeTransfer(msg.sender, destAmount); } return destAmount; } /// @notice Buys a _destAmount of tokens at Oasis /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint srcAmount function buy(address _srcAddr, address _destAddr, uint _destAmount) external override payable returns(uint) { address srcAddr = ethToWethAddr(_srcAddr); address destAddr = ethToWethAddr(_destAddr); ERC20(srcAddr).safeApprove(OTC_ADDRESS, uint(-1)); uint srcAmount = OasisInterface(OTC_ADDRESS).buyAllAmount(destAddr, _destAmount, srcAddr, uint(-1)); // convert weth -> eth and send back if (destAddr == WETH_ADDRESS) { TokenInterface(WETH_ADDRESS).withdraw(_destAmount); msg.sender.transfer(_destAmount); } else { ERC20(destAddr).safeTransfer(msg.sender, _destAmount); } // Send the leftover from the source token back sendLeftOver(srcAddr); return srcAmount; } /// @notice Return a rate for which we can sell an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Rate function getSellRate(address _srcAddr, address _destAddr, uint _srcAmount) public override view returns (uint) { address srcAddr = ethToWethAddr(_srcAddr); address destAddr = ethToWethAddr(_destAddr); return wdiv(OasisInterface(OTC_ADDRESS).getBuyAmount(destAddr, srcAddr, _srcAmount), _srcAmount); } /// @notice Return a rate for which we can buy an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint Rate function getBuyRate(address _srcAddr, address _destAddr, uint _destAmount) public override view returns (uint) { address srcAddr = ethToWethAddr(_srcAddr); address destAddr = ethToWethAddr(_destAddr); return wdiv(OasisInterface(OTC_ADDRESS).getPayAmount(srcAddr, destAddr, _destAmount), _destAmount); } /// @notice Send any leftover tokens, we use to clear out srcTokens after buy /// @param _srcAddr Source token address function sendLeftOver(address _srcAddr) internal { msg.sender.transfer(address(this).balance); if (_srcAddr != KYBER_ETH_ADDRESS) { ERC20(_srcAddr).safeTransfer(msg.sender, ERC20(_srcAddr).balanceOf(address(this))); } } /// @notice Converts Kybers Eth address -> Weth /// @param _src Input address function ethToWethAddr(address _src) internal pure returns (address) { return _src == KYBER_ETH_ADDRESS ? WETH_ADDRESS : _src; } receive() payable external {} } contract UniswapV2Wrapper is DSMath, ExchangeInterfaceV2, AdminAuth { address public constant WETH_ADDRESS = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; UniswapRouterInterface public constant router = UniswapRouterInterface(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D); using SafeERC20 for ERC20; /// @notice Sells a _srcAmount of tokens at UniswapV2 /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Destination amount function sell(address _srcAddr, address _destAddr, uint _srcAmount) external payable override returns (uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); uint[] memory amounts; address[] memory path = new address[](2); path[0] = _srcAddr; path[1] = _destAddr; ERC20(_srcAddr).safeApprove(address(router), _srcAmount); // if we are buying ether if (_destAddr == WETH_ADDRESS) { amounts = router.swapExactTokensForETH(_srcAmount, 1, path, msg.sender, block.timestamp + 1); } // if we are selling token to token else { amounts = router.swapExactTokensForTokens(_srcAmount, 1, path, msg.sender, block.timestamp + 1); } return amounts[amounts.length - 1]; } /// @notice Buys a _destAmount of tokens at UniswapV2 /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint srcAmount function buy(address _srcAddr, address _destAddr, uint _destAmount) external override payable returns(uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); uint[] memory amounts; address[] memory path = new address[](2); path[0] = _srcAddr; path[1] = _destAddr; ERC20(_srcAddr).safeApprove(address(router), uint(-1)); // if we are buying ether if (_destAddr == WETH_ADDRESS) { amounts = router.swapTokensForExactETH(_destAmount, uint(-1), path, msg.sender, block.timestamp + 1); } // if we are buying token to token else { amounts = router.swapTokensForExactTokens(_destAmount, uint(-1), path, msg.sender, block.timestamp + 1); } // Send the leftover from the source token back sendLeftOver(_srcAddr); return amounts[0]; } /// @notice Return a rate for which we can sell an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Rate function getSellRate(address _srcAddr, address _destAddr, uint _srcAmount) public override view returns (uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); address[] memory path = new address[](2); path[0] = _srcAddr; path[1] = _destAddr; uint[] memory amounts = router.getAmountsOut(_srcAmount, path); return wdiv(amounts[amounts.length - 1], _srcAmount); } /// @notice Return a rate for which we can buy an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint Rate function getBuyRate(address _srcAddr, address _destAddr, uint _destAmount) public override view returns (uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); address[] memory path = new address[](2); path[0] = _srcAddr; path[1] = _destAddr; uint[] memory amounts = router.getAmountsIn(_destAmount, path); return wdiv(amounts[0], _destAmount); } /// @notice Send any leftover tokens, we use to clear out srcTokens after buy /// @param _srcAddr Source token address function sendLeftOver(address _srcAddr) internal { msg.sender.transfer(address(this).balance); if (_srcAddr != KYBER_ETH_ADDRESS) { ERC20(_srcAddr).safeTransfer(msg.sender, ERC20(_srcAddr).balanceOf(address(this))); } } /// @notice Converts Kybers Eth address -> Weth /// @param _src Input address function ethToWethAddr(address _src) internal pure returns (address) { return _src == KYBER_ETH_ADDRESS ? WETH_ADDRESS : _src; } receive() payable external {} } contract UniswapWrapper is DSMath, ExchangeInterfaceV2, AdminAuth { address public constant WETH_ADDRESS = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant UNISWAP_FACTORY = 0xc0a47dFe034B400B47bDaD5FecDa2621de6c4d95; using SafeERC20 for ERC20; /// @notice Sells a _srcAmount of tokens at Uniswap /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Destination amount function sell(address _srcAddr, address _destAddr, uint _srcAmount) external payable override returns (uint) { address uniswapExchangeAddr; uint destAmount; _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); // if we are buying ether if (_destAddr == WETH_ADDRESS) { uniswapExchangeAddr = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr); ERC20(_srcAddr).safeApprove(uniswapExchangeAddr, _srcAmount); destAmount = UniswapExchangeInterface(uniswapExchangeAddr). tokenToEthTransferInput(_srcAmount, 1, block.timestamp + 1, msg.sender); } // if we are selling token to token else { uniswapExchangeAddr = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr); ERC20(_srcAddr).safeApprove(uniswapExchangeAddr, _srcAmount); destAmount = UniswapExchangeInterface(uniswapExchangeAddr). tokenToTokenTransferInput(_srcAmount, 1, 1, block.timestamp + 1, msg.sender, _destAddr); } return destAmount; } /// @notice Buys a _destAmount of tokens at Uniswap /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint srcAmount function buy(address _srcAddr, address _destAddr, uint _destAmount) external override payable returns(uint) { address uniswapExchangeAddr; uint srcAmount; _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); // if we are buying ether if (_destAddr == WETH_ADDRESS) { uniswapExchangeAddr = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr); ERC20(_srcAddr).safeApprove(uniswapExchangeAddr, uint(-1)); srcAmount = UniswapExchangeInterface(uniswapExchangeAddr). tokenToEthTransferOutput(_destAmount, uint(-1), block.timestamp + 1, msg.sender); } // if we are buying token to token else { uniswapExchangeAddr = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr); ERC20(_srcAddr).safeApprove(uniswapExchangeAddr, uint(-1)); srcAmount = UniswapExchangeInterface(uniswapExchangeAddr). tokenToTokenTransferOutput(_destAmount, uint(-1), uint(-1), block.timestamp + 1, msg.sender, _destAddr); } // Send the leftover from the source token back sendLeftOver(_srcAddr); return srcAmount; } /// @notice Return a rate for which we can sell an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Rate function getSellRate(address _srcAddr, address _destAddr, uint _srcAmount) public override view returns (uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); if(_srcAddr == WETH_ADDRESS) { address uniswapTokenAddress = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_destAddr); return wdiv(UniswapExchangeInterface(uniswapTokenAddress).getEthToTokenInputPrice(_srcAmount), _srcAmount); } else if (_destAddr == WETH_ADDRESS) { address uniswapTokenAddress = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr); return wdiv(UniswapExchangeInterface(uniswapTokenAddress).getTokenToEthInputPrice(_srcAmount), _srcAmount); } else { uint ethBought = UniswapExchangeInterface(UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr)).getTokenToEthInputPrice(_srcAmount); return wdiv(UniswapExchangeInterface(UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_destAddr)).getEthToTokenInputPrice(ethBought), _srcAmount); } } /// @notice Return a rate for which we can buy an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint Rate function getBuyRate(address _srcAddr, address _destAddr, uint _destAmount) public override view returns (uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); if(_srcAddr == WETH_ADDRESS) { address uniswapTokenAddress = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_destAddr); return wdiv(UniswapExchangeInterface(uniswapTokenAddress).getEthToTokenOutputPrice(_destAmount), _destAmount); } else if (_destAddr == WETH_ADDRESS) { address uniswapTokenAddress = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr); return wdiv(UniswapExchangeInterface(uniswapTokenAddress).getTokenToEthOutputPrice(_destAmount), _destAmount); } else { uint ethNeeded = UniswapExchangeInterface(UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_destAddr)).getTokenToEthOutputPrice(_destAmount); return wdiv(UniswapExchangeInterface(UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr)).getEthToTokenOutputPrice(ethNeeded), _destAmount); } } /// @notice Send any leftover tokens, we use to clear out srcTokens after buy /// @param _srcAddr Source token address function sendLeftOver(address _srcAddr) internal { msg.sender.transfer(address(this).balance); if (_srcAddr != KYBER_ETH_ADDRESS) { ERC20(_srcAddr).safeTransfer(msg.sender, ERC20(_srcAddr).balanceOf(address(this))); } } /// @notice Converts Kybers Eth address -> Weth /// @param _src Input address function ethToWethAddr(address _src) internal pure returns (address) { return _src == KYBER_ETH_ADDRESS ? WETH_ADDRESS : _src; } receive() payable external {} } contract DyDxFlashLoanTaker is DydxFlashLoanBase, ProxyPermission { address public constant WETH_ADDR = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; /// @notice Takes flash loan for _receiver /// @dev Receiver must send back WETH + 2 wei after executing transaction /// @dev Method is meant to be called from proxy and proxy will give authorization to _receiver /// @param _receiver Address of funds receiver /// @param _ethAmount ETH amount that needs to be pulled from dydx /// @param _encodedData Bytes with packed data function takeLoan(address _receiver, uint256 _ethAmount, bytes memory _encodedData) public { ISoloMargin solo = ISoloMargin(SOLO_MARGIN_ADDRESS); // Get marketId from token address uint256 marketId = _getMarketIdFromTokenAddress(WETH_ADDR); // Calculate repay amount (_amount + (2 wei)) // Approve transfer from uint256 repayAmount = _getRepaymentAmountInternal(_ethAmount); ERC20(WETH_ADDR).approve(SOLO_MARGIN_ADDRESS, repayAmount); Actions.ActionArgs[] memory operations = new Actions.ActionArgs[](3); operations[0] = _getWithdrawAction(marketId, _ethAmount, _receiver); operations[1] = _getCallAction( _encodedData, _receiver ); operations[2] = _getDepositAction(marketId, repayAmount, address(this)); Account.Info[] memory accountInfos = new Account.Info[](1); accountInfos[0] = _getAccountInfo(); givePermission(_receiver); solo.operate(accountInfos, operations); removePermission(_receiver); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "DyDxFlashLoanTaken", abi.encode(_receiver, _ethAmount, _encodedData)); } } abstract contract CTokenInterface is ERC20 { function mint(uint256 mintAmount) external virtual returns (uint256); // function mint() external virtual payable; function accrueInterest() public virtual returns (uint); function redeem(uint256 redeemTokens) external virtual returns (uint256); function redeemUnderlying(uint256 redeemAmount) external virtual returns (uint256); function borrow(uint256 borrowAmount) external virtual returns (uint256); function repayBorrow(uint256 repayAmount) external virtual returns (uint256); function repayBorrow() external virtual payable; function repayBorrowBehalf(address borrower, uint256 repayAmount) external virtual returns (uint256); function repayBorrowBehalf(address borrower) external virtual payable; function liquidateBorrow(address borrower, uint256 repayAmount, address cTokenCollateral) external virtual returns (uint256); function liquidateBorrow(address borrower, address cTokenCollateral) external virtual payable; function exchangeRateCurrent() external virtual returns (uint256); function supplyRatePerBlock() external virtual returns (uint256); function borrowRatePerBlock() external virtual returns (uint256); function totalReserves() external virtual returns (uint256); function reserveFactorMantissa() external virtual returns (uint256); function borrowBalanceCurrent(address account) external virtual returns (uint256); function totalBorrowsCurrent() external virtual returns (uint256); function getCash() external virtual returns (uint256); function balanceOfUnderlying(address owner) external virtual returns (uint256); function underlying() external virtual returns (address); function getAccountSnapshot(address account) external virtual view returns (uint, uint, uint, uint); } abstract contract ISubscriptionsV2 is StaticV2 { function getOwner(uint _cdpId) external view virtual returns(address); function getSubscribedInfo(uint _cdpId) public view virtual returns(bool, uint128, uint128, uint128, uint128, address, uint coll, uint debt); function getCdpHolder(uint _cdpId) public view virtual returns (bool subscribed, CdpHolder memory); } contract MCDMonitorV2 is DSMath, AdminAuth, GasBurner, StaticV2 { uint public REPAY_GAS_TOKEN = 25; uint public BOOST_GAS_TOKEN = 25; uint public MAX_GAS_PRICE = 200000000000; // 200 gwei uint public REPAY_GAS_COST = 2500000; uint public BOOST_GAS_COST = 2500000; MCDMonitorProxyV2 public monitorProxyContract; ISubscriptionsV2 public subscriptionsContract; address public mcdSaverTakerAddress; address public constant BOT_REGISTRY_ADDRESS = 0x637726f8b08a7ABE3aE3aCaB01A80E2d8ddeF77B; Manager public manager = Manager(0x5ef30b9986345249bc32d8928B7ee64DE9435E39); Vat public vat = Vat(0x35D1b3F3D7966A1DFe207aa4514C12a259A0492B); Spotter public spotter = Spotter(0x65C79fcB50Ca1594B025960e539eD7A9a6D434A3); DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); modifier onlyApproved() { require(BotRegistry(BOT_REGISTRY_ADDRESS).botList(msg.sender), "Not auth bot"); _; } constructor(address _monitorProxy, address _subscriptions, address _mcdSaverTakerAddress) public { monitorProxyContract = MCDMonitorProxyV2(_monitorProxy); subscriptionsContract = ISubscriptionsV2(_subscriptions); mcdSaverTakerAddress = _mcdSaverTakerAddress; } /// @notice Bots call this method to repay for user when conditions are met /// @dev If the contract ownes gas token it will try and use it for gas price reduction function repayFor( SaverExchangeCore.ExchangeData memory _exchangeData, uint _cdpId, uint _nextPrice, address _joinAddr ) public payable onlyApproved burnGas(REPAY_GAS_TOKEN) { (bool isAllowed, uint ratioBefore) = canCall(Method.Repay, _cdpId, _nextPrice); require(isAllowed); uint gasCost = calcGasCost(REPAY_GAS_COST); address owner = subscriptionsContract.getOwner(_cdpId); monitorProxyContract.callExecute{value: msg.value}( owner, mcdSaverTakerAddress, abi.encodeWithSignature( "repayWithLoan((address,address,uint256,uint256,uint256,address,address,bytes,uint256),uint256,uint256,address)", _exchangeData, _cdpId, gasCost, _joinAddr)); (bool isGoodRatio, uint ratioAfter) = ratioGoodAfter(Method.Repay, _cdpId, _nextPrice); require(isGoodRatio); returnEth(); logger.Log(address(this), owner, "AutomaticMCDRepay", abi.encode(ratioBefore, ratioAfter)); } /// @notice Bots call this method to boost for user when conditions are met /// @dev If the contract ownes gas token it will try and use it for gas price reduction function boostFor( SaverExchangeCore.ExchangeData memory _exchangeData, uint _cdpId, uint _nextPrice, address _joinAddr ) public payable onlyApproved burnGas(BOOST_GAS_TOKEN) { (bool isAllowed, uint ratioBefore) = canCall(Method.Boost, _cdpId, _nextPrice); require(isAllowed); uint gasCost = calcGasCost(BOOST_GAS_COST); address owner = subscriptionsContract.getOwner(_cdpId); monitorProxyContract.callExecute{value: msg.value}( owner, mcdSaverTakerAddress, abi.encodeWithSignature( "boostWithLoan((address,address,uint256,uint256,uint256,address,address,bytes,uint256),uint256,uint256,address)", _exchangeData, _cdpId, gasCost, _joinAddr)); (bool isGoodRatio, uint ratioAfter) = ratioGoodAfter(Method.Boost, _cdpId, _nextPrice); require(isGoodRatio); returnEth(); logger.Log(address(this), owner, "AutomaticMCDBoost", abi.encode(ratioBefore, ratioAfter)); } /******************* INTERNAL METHODS ********************************/ function returnEth() internal { // return if some eth left if (address(this).balance > 0) { msg.sender.transfer(address(this).balance); } } /******************* STATIC METHODS ********************************/ /// @notice Returns an address that owns the CDP /// @param _cdpId Id of the CDP function getOwner(uint _cdpId) public view returns(address) { return manager.owns(_cdpId); } /// @notice Gets CDP info (collateral, debt) /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP function getCdpInfo(uint _cdpId, bytes32 _ilk) public view returns (uint, uint) { address urn = manager.urns(_cdpId); (uint collateral, uint debt) = vat.urns(_ilk, urn); (,uint rate,,,) = vat.ilks(_ilk); return (collateral, rmul(debt, rate)); } /// @notice Gets a price of the asset /// @param _ilk Ilk of the CDP function getPrice(bytes32 _ilk) public view returns (uint) { (, uint mat) = spotter.ilks(_ilk); (,,uint spot,,) = vat.ilks(_ilk); return rmul(rmul(spot, spotter.par()), mat); } /// @notice Gets CDP ratio /// @param _cdpId Id of the CDP /// @param _nextPrice Next price for user function getRatio(uint _cdpId, uint _nextPrice) public view returns (uint) { bytes32 ilk = manager.ilks(_cdpId); uint price = (_nextPrice == 0) ? getPrice(ilk) : _nextPrice; (uint collateral, uint debt) = getCdpInfo(_cdpId, ilk); if (debt == 0) return 0; return rdiv(wmul(collateral, price), debt) / (10 ** 18); } /// @notice Checks if Boost/Repay could be triggered for the CDP /// @dev Called by MCDMonitor to enforce the min/max check function canCall(Method _method, uint _cdpId, uint _nextPrice) public view returns(bool, uint) { bool subscribed; CdpHolder memory holder; (subscribed, holder) = subscriptionsContract.getCdpHolder(_cdpId); // check if cdp is subscribed if (!subscribed) return (false, 0); // check if using next price is allowed if (_nextPrice > 0 && !holder.nextPriceEnabled) return (false, 0); // check if boost and boost allowed if (_method == Method.Boost && !holder.boostEnabled) return (false, 0); // check if owner is still owner if (getOwner(_cdpId) != holder.owner) return (false, 0); uint currRatio = getRatio(_cdpId, _nextPrice); if (_method == Method.Repay) { return (currRatio < holder.minRatio, currRatio); } else if (_method == Method.Boost) { return (currRatio > holder.maxRatio, currRatio); } } /// @dev After the Boost/Repay check if the ratio doesn't trigger another call function ratioGoodAfter(Method _method, uint _cdpId, uint _nextPrice) public view returns(bool, uint) { CdpHolder memory holder; (, holder) = subscriptionsContract.getCdpHolder(_cdpId); uint currRatio = getRatio(_cdpId, _nextPrice); if (_method == Method.Repay) { return (currRatio < holder.maxRatio, currRatio); } else if (_method == Method.Boost) { return (currRatio > holder.minRatio, currRatio); } } /// @notice Calculates gas cost (in Eth) of tx /// @dev Gas price is limited to MAX_GAS_PRICE to prevent attack of draining user CDP /// @param _gasAmount Amount of gas used for the tx function calcGasCost(uint _gasAmount) public view returns (uint) { uint gasPrice = tx.gasprice <= MAX_GAS_PRICE ? tx.gasprice : MAX_GAS_PRICE; return mul(gasPrice, _gasAmount); } /******************* OWNER ONLY OPERATIONS ********************************/ /// @notice Allows owner to change gas cost for boost operation, but only up to 3 millions /// @param _gasCost New gas cost for boost method function changeBoostGasCost(uint _gasCost) public onlyOwner { require(_gasCost < 3000000); BOOST_GAS_COST = _gasCost; } /// @notice Allows owner to change gas cost for repay operation, but only up to 3 millions /// @param _gasCost New gas cost for repay method function changeRepayGasCost(uint _gasCost) public onlyOwner { require(_gasCost < 3000000); REPAY_GAS_COST = _gasCost; } /// @notice Allows owner to change max gas price /// @param _maxGasPrice New max gas price function changeMaxGasPrice(uint _maxGasPrice) public onlyOwner { require(_maxGasPrice < 500000000000); MAX_GAS_PRICE = _maxGasPrice; } /// @notice Allows owner to change the amount of gas token burned per function call /// @param _gasAmount Amount of gas token /// @param _isRepay Flag to know for which function we are setting the gas token amount function changeGasTokenAmount(uint _gasAmount, bool _isRepay) public onlyOwner { if (_isRepay) { REPAY_GAS_TOKEN = _gasAmount; } else { BOOST_GAS_TOKEN = _gasAmount; } } } contract MCDCloseFlashLoan is SaverExchangeCore, MCDSaverProxyHelper, FlashLoanReceiverBase, AdminAuth { ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); uint public constant SERVICE_FEE = 400; // 0.25% Fee bytes32 internal constant ETH_ILK = 0x4554482d41000000000000000000000000000000000000000000000000000000; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; address public constant DAI_JOIN_ADDRESS = 0x9759A6Ac90977b93B58547b4A71c78317f391A28; address public constant ETH_JOIN_ADDRESS = 0x2F0b23f53734252Bda2277357e97e1517d6B042A; address public constant SPOTTER_ADDRESS = 0x65C79fcB50Ca1594B025960e539eD7A9a6D434A3; address public constant VAT_ADDRESS = 0x35D1b3F3D7966A1DFe207aa4514C12a259A0492B; Manager public constant manager = Manager(0x5ef30b9986345249bc32d8928B7ee64DE9435E39); DaiJoin public constant daiJoin = DaiJoin(DAI_JOIN_ADDRESS); Spotter public constant spotter = Spotter(SPOTTER_ADDRESS); Vat public constant vat = Vat(VAT_ADDRESS); struct CloseData { uint cdpId; uint collAmount; uint daiAmount; uint minAccepted; address joinAddr; address proxy; uint flFee; bool toDai; address reserve; uint amount; } constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public {} function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { ( uint[8] memory numData, address[5] memory addrData, bytes memory callData, address proxy, bool toDai ) = abi.decode(_params, (uint256[8],address[5],bytes,address,bool)); ExchangeData memory exchangeData = ExchangeData({ srcAddr: addrData[0], destAddr: addrData[1], srcAmount: numData[4], destAmount: numData[5], minPrice: numData[6], wrapper: addrData[3], exchangeAddr: addrData[2], callData: callData, price0x: numData[7] }); CloseData memory closeData = CloseData({ cdpId: numData[0], collAmount: numData[1], daiAmount: numData[2], minAccepted: numData[3], joinAddr: addrData[4], proxy: proxy, flFee: _fee, toDai: toDai, reserve: _reserve, amount: _amount }); address user = DSProxy(payable(closeData.proxy)).owner(); closeCDP(closeData, exchangeData, user); } function closeCDP( CloseData memory _closeData, ExchangeData memory _exchangeData, address _user ) internal { paybackDebt(_closeData.cdpId, manager.ilks(_closeData.cdpId), _closeData.daiAmount); // payback whole debt drawMaxCollateral(_closeData.cdpId, _closeData.joinAddr, _closeData.collAmount); // draw whole collateral uint daiSwaped = 0; uint dfsFee = 0; if (_closeData.toDai) { _exchangeData.srcAmount = _closeData.collAmount; (, daiSwaped) = _sell(_exchangeData); dfsFee = getFee(daiSwaped, _user); } else { dfsFee = getFee(_closeData.daiAmount, _user); _exchangeData.destAmount = (_closeData.daiAmount + _closeData.flFee + dfsFee); (, daiSwaped) = _buy(_exchangeData); } takeFee(dfsFee); address tokenAddr = getVaultCollAddr(_closeData.joinAddr); if (_closeData.toDai) { tokenAddr = DAI_ADDRESS; } require(getBalance(tokenAddr) >= _closeData.minAccepted, "Below min. number of eth specified"); transferFundsBackToPoolInternal(_closeData.reserve, _closeData.amount.add(_closeData.flFee)); sendLeftover(tokenAddr, DAI_ADDRESS, payable(_user)); } function drawMaxCollateral(uint _cdpId, address _joinAddr, uint _amount) internal returns (uint) { manager.frob(_cdpId, -toPositiveInt(_amount), 0); manager.flux(_cdpId, address(this), _amount); uint joinAmount = _amount; if (Join(_joinAddr).dec() != 18) { joinAmount = _amount / (10 ** (18 - Join(_joinAddr).dec())); } Join(_joinAddr).exit(address(this), joinAmount); if (_joinAddr == ETH_JOIN_ADDRESS) { Join(_joinAddr).gem().withdraw(joinAmount); // Weth -> Eth } return joinAmount; } function paybackDebt(uint _cdpId, bytes32 _ilk, uint _daiAmount) internal { address urn = manager.urns(_cdpId); daiJoin.dai().approve(DAI_JOIN_ADDRESS, _daiAmount); daiJoin.join(urn, _daiAmount); manager.frob(_cdpId, 0, normalizePaybackAmount(VAT_ADDRESS, urn, _ilk)); } function takeFee(uint _feeAmount) internal returns (uint) { ERC20(DAI_ADDRESS).transfer(WALLET_ID, _feeAmount); } function getFee(uint _amount, address _owner) internal view returns (uint feeAmount) { uint fee = SERVICE_FEE; if (Discount(DISCOUNT_ADDRESS).isCustomFeeSet(_owner)) { fee = Discount(DISCOUNT_ADDRESS).getCustomServiceFee(_owner); } feeAmount = (fee == 0) ? 0 : (_amount / fee); // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } } function getVaultCollAddr(address _joinAddr) internal view returns (address) { address tokenAddr = address(Join(_joinAddr).gem()); if (tokenAddr == WETH_ADDRESS) { return KYBER_ETH_ADDRESS; } return tokenAddr; } function getPrice(bytes32 _ilk) public view returns (uint256) { (, uint256 mat) = spotter.ilks(_ilk); (, , uint256 spot, , ) = vat.ilks(_ilk); return rmul(rmul(spot, spotter.par()), mat); } receive() external override(FlashLoanReceiverBase, SaverExchangeCore) payable {} } contract MCDCloseTaker is MCDSaverProxyHelper { address public constant SUBSCRIPTION_ADDRESS_NEW = 0xC45d4f6B6bf41b6EdAA58B01c4298B8d9078269a; address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); // solhint-disable-next-line const-name-snakecase Manager public constant manager = Manager(0x5ef30b9986345249bc32d8928B7ee64DE9435E39); address public constant SPOTTER_ADDRESS = 0x65C79fcB50Ca1594B025960e539eD7A9a6D434A3; address public constant VAT_ADDRESS = 0x35D1b3F3D7966A1DFe207aa4514C12a259A0492B; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; // solhint-disable-next-line const-name-snakecase DefisaverLogger public constant logger = DefisaverLogger(DEFISAVER_LOGGER); struct CloseData { uint cdpId; address joinAddr; uint collAmount; uint daiAmount; uint minAccepted; bool wholeDebt; bool toDai; } Vat public constant vat = Vat(VAT_ADDRESS); Spotter public constant spotter = Spotter(SPOTTER_ADDRESS); function closeWithLoan( SaverExchangeCore.ExchangeData memory _exchangeData, CloseData memory _closeData, address payable mcdCloseFlashLoan ) public payable { mcdCloseFlashLoan.transfer(msg.value); // 0x fee if (_closeData.wholeDebt) { _closeData.daiAmount = getAllDebt( VAT_ADDRESS, manager.urns(_closeData.cdpId), manager.urns(_closeData.cdpId), manager.ilks(_closeData.cdpId) ); (_closeData.collAmount, ) = getCdpInfo(manager, _closeData.cdpId, manager.ilks(_closeData.cdpId)); } manager.cdpAllow(_closeData.cdpId, mcdCloseFlashLoan, 1); (uint[8] memory numData, address[5] memory addrData, bytes memory callData) = _packData(_closeData, _exchangeData); bytes memory paramsData = abi.encode(numData, addrData, callData, address(this), _closeData.toDai); lendingPool.flashLoan(mcdCloseFlashLoan, DAI_ADDRESS, _closeData.daiAmount, paramsData); manager.cdpAllow(_closeData.cdpId, mcdCloseFlashLoan, 0); // If sub. to automatic protection unsubscribe unsubscribe(SUBSCRIPTION_ADDRESS_NEW, _closeData.cdpId); logger.Log(address(this), msg.sender, "MCDClose", abi.encode(_closeData.cdpId, _closeData.collAmount, _closeData.daiAmount, _closeData.toDai)); } /// @notice Gets the maximum amount of debt available to generate /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP function getMaxDebt(uint256 _cdpId, bytes32 _ilk) public view returns (uint256) { uint256 price = getPrice(_ilk); (, uint256 mat) = spotter.ilks(_ilk); (uint256 collateral, uint256 debt) = getCdpInfo(manager, _cdpId, _ilk); return sub(wdiv(wmul(collateral, price), mat), debt); } /// @notice Gets a price of the asset /// @param _ilk Ilk of the CDP function getPrice(bytes32 _ilk) public view returns (uint256) { (, uint256 mat) = spotter.ilks(_ilk); (, , uint256 spot, , ) = vat.ilks(_ilk); return rmul(rmul(spot, spotter.par()), mat); } function unsubscribe(address _subContract, uint _cdpId) internal { (, bool isSubscribed) = IMCDSubscriptions(_subContract).subscribersPos(_cdpId); if (isSubscribed) { IMCDSubscriptions(_subContract).unsubscribe(_cdpId); } } function _packData( CloseData memory _closeData, SaverExchangeCore.ExchangeData memory exchangeData ) internal pure returns (uint[8] memory numData, address[5] memory addrData, bytes memory callData) { numData = [ _closeData.cdpId, _closeData.collAmount, _closeData.daiAmount, _closeData.minAccepted, exchangeData.srcAmount, exchangeData.destAmount, exchangeData.minPrice, exchangeData.price0x ]; addrData = [ exchangeData.srcAddr, exchangeData.destAddr, exchangeData.exchangeAddr, exchangeData.wrapper, _closeData.joinAddr ]; callData = exchangeData.callData; } } contract MCDCreateFlashLoan is SaverExchangeCore, AdminAuth, FlashLoanReceiverBase { address public constant CREATE_PROXY_ACTIONS = 0x6d0984E80a86f26c0dd564ca0CF74a8E9Da03305; uint public constant SERVICE_FEE = 400; // 0.25% Fee address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); address public constant ETH_JOIN_ADDRESS = 0x2F0b23f53734252Bda2277357e97e1517d6B042A; address public constant DAI_JOIN_ADDRESS = 0x9759A6Ac90977b93B58547b4A71c78317f391A28; address public constant JUG_ADDRESS = 0x19c0976f590D67707E62397C87829d896Dc0f1F1; address public constant MANAGER_ADDRESS = 0x5ef30b9986345249bc32d8928B7ee64DE9435E39; constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public {} function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { //check the contract has the specified balance require(_amount <= getBalanceInternal(address(this), _reserve), "Invalid balance for the contract"); ( uint[6] memory numData, address[5] memory addrData, bytes memory callData, address proxy ) = abi.decode(_params, (uint256[6],address[5],bytes,address)); ExchangeData memory exchangeData = ExchangeData({ srcAddr: addrData[0], destAddr: addrData[1], srcAmount: numData[2], destAmount: numData[3], minPrice: numData[4], wrapper: addrData[3], exchangeAddr: addrData[2], callData: callData, price0x: numData[5] }); openAndLeverage(numData[0], numData[1] + _fee, addrData[4], proxy, exchangeData); transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } } function openAndLeverage( uint _collAmount, uint _daiAmountAndFee, address _joinAddr, address _proxy, ExchangeData memory _exchangeData ) public { uint dfsFee = getFee(_exchangeData.srcAmount, DSProxy(payable(_proxy)).owner()); _exchangeData.srcAmount = (_exchangeData.srcAmount - dfsFee); (, uint256 collSwaped) = _sell(_exchangeData); bytes32 ilk = Join(_joinAddr).ilk(); if (_joinAddr == ETH_JOIN_ADDRESS) { MCDCreateProxyActions(CREATE_PROXY_ACTIONS).openLockETHAndDraw{value: address(this).balance}( MANAGER_ADDRESS, JUG_ADDRESS, ETH_JOIN_ADDRESS, DAI_JOIN_ADDRESS, ilk, _daiAmountAndFee, _proxy ); } else { ERC20(address(Join(_joinAddr).gem())).safeApprove(CREATE_PROXY_ACTIONS, 0); ERC20(address(Join(_joinAddr).gem())).safeApprove(CREATE_PROXY_ACTIONS, uint256(-1)); MCDCreateProxyActions(CREATE_PROXY_ACTIONS).openLockGemAndDraw( MANAGER_ADDRESS, JUG_ADDRESS, _joinAddr, DAI_JOIN_ADDRESS, ilk, (_collAmount + collSwaped), _daiAmountAndFee, true, _proxy ); } } function getFee(uint _amount, address _owner) internal returns (uint feeAmount) { uint fee = SERVICE_FEE; if (Discount(DISCOUNT_ADDRESS).isCustomFeeSet(_owner)) { fee = Discount(DISCOUNT_ADDRESS).getCustomServiceFee(_owner); } feeAmount = (fee == 0) ? 0 : (_amount / fee); // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } ERC20(DAI_ADDRESS).transfer(WALLET_ID, feeAmount); } receive() external override(FlashLoanReceiverBase, SaverExchangeCore) payable {} } contract MCDSaverProxy is SaverExchangeCore, MCDSaverProxyHelper { uint public constant MANUAL_SERVICE_FEE = 400; // 0.25% Fee uint public constant AUTOMATIC_SERVICE_FEE = 333; // 0.3% Fee bytes32 public constant ETH_ILK = 0x4554482d41000000000000000000000000000000000000000000000000000000; address public constant MANAGER_ADDRESS = 0x5ef30b9986345249bc32d8928B7ee64DE9435E39; address public constant VAT_ADDRESS = 0x35D1b3F3D7966A1DFe207aa4514C12a259A0492B; address public constant SPOTTER_ADDRESS = 0x65C79fcB50Ca1594B025960e539eD7A9a6D434A3; address public constant DAI_JOIN_ADDRESS = 0x9759A6Ac90977b93B58547b4A71c78317f391A28; address public constant JUG_ADDRESS = 0x19c0976f590D67707E62397C87829d896Dc0f1F1; address public constant ETH_JOIN_ADDRESS = 0x2F0b23f53734252Bda2277357e97e1517d6B042A; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; address public constant BOT_REGISTRY_ADDRESS = 0x637726f8b08a7ABE3aE3aCaB01A80E2d8ddeF77B; Manager public constant manager = Manager(MANAGER_ADDRESS); Vat public constant vat = Vat(VAT_ADDRESS); DaiJoin public constant daiJoin = DaiJoin(DAI_JOIN_ADDRESS); Spotter public constant spotter = Spotter(SPOTTER_ADDRESS); DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); /// @notice Repay - draws collateral, converts to Dai and repays the debt /// @dev Must be called by the DSProxy contract that owns the CDP function repay( SaverExchangeCore.ExchangeData memory _exchangeData, uint _cdpId, uint _gasCost, address _joinAddr ) public payable { address owner = getOwner(manager, _cdpId); bytes32 ilk = manager.ilks(_cdpId); drawCollateral(_cdpId, _joinAddr, _exchangeData.srcAmount); (, uint daiAmount) = _sell(_exchangeData); uint daiAfterFee = sub(daiAmount, getFee(daiAmount, _gasCost, owner)); paybackDebt(_cdpId, ilk, daiAfterFee, owner); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } logger.Log(address(this), msg.sender, "MCDRepay", abi.encode(_cdpId, owner, _exchangeData.srcAmount, daiAmount)); } /// @notice Boost - draws Dai, converts to collateral and adds to CDP /// @dev Must be called by the DSProxy contract that owns the CDP function boost( SaverExchangeCore.ExchangeData memory _exchangeData, uint _cdpId, uint _gasCost, address _joinAddr ) public payable { address owner = getOwner(manager, _cdpId); bytes32 ilk = manager.ilks(_cdpId); uint daiDrawn = drawDai(_cdpId, ilk, _exchangeData.srcAmount); uint daiAfterFee = sub(daiDrawn, getFee(daiDrawn, _gasCost, owner)); _exchangeData.srcAmount = daiAfterFee; (, uint swapedColl) = _sell(_exchangeData); addCollateral(_cdpId, _joinAddr, swapedColl); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } logger.Log(address(this), msg.sender, "MCDBoost", abi.encode(_cdpId, owner, _exchangeData.srcAmount, swapedColl)); } /// @notice Draws Dai from the CDP /// @dev If _daiAmount is bigger than max available we'll draw max /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP /// @param _daiAmount Amount of Dai to draw function drawDai(uint _cdpId, bytes32 _ilk, uint _daiAmount) internal returns (uint) { uint rate = Jug(JUG_ADDRESS).drip(_ilk); uint daiVatBalance = vat.dai(manager.urns(_cdpId)); uint maxAmount = getMaxDebt(_cdpId, _ilk); if (_daiAmount >= maxAmount) { _daiAmount = sub(maxAmount, 1); } manager.frob(_cdpId, int(0), normalizeDrawAmount(_daiAmount, rate, daiVatBalance)); manager.move(_cdpId, address(this), toRad(_daiAmount)); if (vat.can(address(this), address(DAI_JOIN_ADDRESS)) == 0) { vat.hope(DAI_JOIN_ADDRESS); } DaiJoin(DAI_JOIN_ADDRESS).exit(address(this), _daiAmount); return _daiAmount; } /// @notice Adds collateral to the CDP /// @param _cdpId Id of the CDP /// @param _joinAddr Address of the join contract for the CDP collateral /// @param _amount Amount of collateral to add function addCollateral(uint _cdpId, address _joinAddr, uint _amount) internal { int convertAmount = 0; if (_joinAddr == ETH_JOIN_ADDRESS) { Join(_joinAddr).gem().deposit{value: _amount}(); convertAmount = toPositiveInt(_amount); } else { convertAmount = toPositiveInt(convertTo18(_joinAddr, _amount)); } ERC20(address(Join(_joinAddr).gem())).safeApprove(_joinAddr, 0); ERC20(address(Join(_joinAddr).gem())).safeApprove(_joinAddr, _amount); Join(_joinAddr).join(address(this), _amount); vat.frob( manager.ilks(_cdpId), manager.urns(_cdpId), address(this), address(this), convertAmount, 0 ); } /// @notice Draws collateral and returns it to DSProxy /// @dev If _amount is bigger than max available we'll draw max /// @param _cdpId Id of the CDP /// @param _joinAddr Address of the join contract for the CDP collateral /// @param _amount Amount of collateral to draw function drawCollateral(uint _cdpId, address _joinAddr, uint _amount) internal returns (uint) { uint frobAmount = _amount; if (Join(_joinAddr).dec() != 18) { frobAmount = _amount * (10 ** (18 - Join(_joinAddr).dec())); } manager.frob(_cdpId, -toPositiveInt(frobAmount), 0); manager.flux(_cdpId, address(this), frobAmount); Join(_joinAddr).exit(address(this), _amount); if (_joinAddr == ETH_JOIN_ADDRESS) { Join(_joinAddr).gem().withdraw(_amount); // Weth -> Eth } return _amount; } /// @notice Paybacks Dai debt /// @dev If the _daiAmount is bigger than the whole debt, returns extra Dai /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP /// @param _daiAmount Amount of Dai to payback /// @param _owner Address that owns the DSProxy that owns the CDP function paybackDebt(uint _cdpId, bytes32 _ilk, uint _daiAmount, address _owner) internal { address urn = manager.urns(_cdpId); uint wholeDebt = getAllDebt(VAT_ADDRESS, urn, urn, _ilk); if (_daiAmount > wholeDebt) { ERC20(DAI_ADDRESS).transfer(_owner, sub(_daiAmount, wholeDebt)); _daiAmount = wholeDebt; } if (ERC20(DAI_ADDRESS).allowance(address(this), DAI_JOIN_ADDRESS) == 0) { ERC20(DAI_ADDRESS).approve(DAI_JOIN_ADDRESS, uint(-1)); } daiJoin.join(urn, _daiAmount); manager.frob(_cdpId, 0, normalizePaybackAmount(VAT_ADDRESS, urn, _ilk)); } /// @notice Calculates the fee amount /// @param _amount Dai amount that is converted /// @param _gasCost Used for Monitor, estimated gas cost of tx /// @param _owner The address that controlls the DSProxy that owns the CDP function getFee(uint _amount, uint _gasCost, address _owner) internal returns (uint feeAmount) { uint fee = MANUAL_SERVICE_FEE; if (BotRegistry(BOT_REGISTRY_ADDRESS).botList(tx.origin)) { fee = AUTOMATIC_SERVICE_FEE; } if (Discount(DISCOUNT_ADDRESS).isCustomFeeSet(_owner)) { fee = Discount(DISCOUNT_ADDRESS).getCustomServiceFee(_owner); } feeAmount = (fee == 0) ? 0 : (_amount / fee); if (_gasCost != 0) { uint ethDaiPrice = getPrice(ETH_ILK); _gasCost = rmul(_gasCost, ethDaiPrice); feeAmount = add(feeAmount, _gasCost); } // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } ERC20(DAI_ADDRESS).transfer(WALLET_ID, feeAmount); } /// @notice Gets the maximum amount of collateral available to draw /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP /// @param _joinAddr Joind address of collateral /// @dev Substracts 10 wei to aviod rounding error later on function getMaxCollateral(uint _cdpId, bytes32 _ilk, address _joinAddr) public view returns (uint) { uint price = getPrice(_ilk); (uint collateral, uint debt) = getCdpInfo(manager, _cdpId, _ilk); (, uint mat) = Spotter(SPOTTER_ADDRESS).ilks(_ilk); uint maxCollateral = sub(sub(collateral, (div(mul(mat, debt), price))), 10); uint normalizeMaxCollateral = maxCollateral; if (Join(_joinAddr).dec() != 18) { normalizeMaxCollateral = maxCollateral / (10 ** (18 - Join(_joinAddr).dec())); } return normalizeMaxCollateral; } /// @notice Gets the maximum amount of debt available to generate /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP /// @dev Substracts 10 wei to aviod rounding error later on function getMaxDebt(uint _cdpId, bytes32 _ilk) public virtual view returns (uint) { uint price = getPrice(_ilk); (, uint mat) = spotter.ilks(_ilk); (uint collateral, uint debt) = getCdpInfo(manager, _cdpId, _ilk); return sub(sub(div(mul(collateral, price), mat), debt), 10); } /// @notice Gets a price of the asset /// @param _ilk Ilk of the CDP function getPrice(bytes32 _ilk) public view returns (uint) { (, uint mat) = spotter.ilks(_ilk); (,,uint spot,,) = vat.ilks(_ilk); return rmul(rmul(spot, spotter.par()), mat); } /// @notice Gets CDP ratio /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP function getRatio(uint _cdpId, bytes32 _ilk) public view returns (uint) { uint price = getPrice( _ilk); (uint collateral, uint debt) = getCdpInfo(manager, _cdpId, _ilk); if (debt == 0) return 0; return rdiv(wmul(collateral, price), debt); } /// @notice Gets CDP info (collateral, debt, price, ilk) /// @param _cdpId Id of the CDP function getCdpDetailedInfo(uint _cdpId) public view returns (uint collateral, uint debt, uint price, bytes32 ilk) { address urn = manager.urns(_cdpId); ilk = manager.ilks(_cdpId); (collateral, debt) = vat.urns(ilk, urn); (,uint rate,,,) = vat.ilks(ilk); debt = rmul(debt, rate); price = getPrice(ilk); } } contract MCDSaverTaker is MCDSaverProxy, GasBurner { address payable public constant MCD_SAVER_FLASH_LOAN = 0x28e444b53a9e7E3F6fFe50E93b18dCce7838551F; address public constant AAVE_POOL_CORE = 0x3dfd23A6c5E8BbcFc9581d2E864a68feb6a076d3; ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); function boostWithLoan( SaverExchangeCore.ExchangeData memory _exchangeData, uint _cdpId, uint _gasCost, address _joinAddr ) public payable burnGas(25) { uint256 maxDebt = getMaxDebt(_cdpId, manager.ilks(_cdpId)); if (maxDebt >= _exchangeData.srcAmount) { boost(_exchangeData, _cdpId, _gasCost, _joinAddr); return; } MCD_SAVER_FLASH_LOAN.transfer(msg.value); // 0x fee uint256 loanAmount = sub(_exchangeData.srcAmount, maxDebt); uint maxLiq = getAvailableLiquidity(DAI_ADDRESS); loanAmount = loanAmount > maxLiq ? maxLiq : loanAmount; manager.cdpAllow(_cdpId, MCD_SAVER_FLASH_LOAN, 1); bytes memory paramsData = abi.encode(packExchangeData(_exchangeData), _cdpId, _gasCost, _joinAddr, false); lendingPool.flashLoan(MCD_SAVER_FLASH_LOAN, DAI_ADDRESS, loanAmount, paramsData); manager.cdpAllow(_cdpId, MCD_SAVER_FLASH_LOAN, 0); } function repayWithLoan( SaverExchangeCore.ExchangeData memory _exchangeData, uint _cdpId, uint _gasCost, address _joinAddr ) public payable burnGas(25) { uint256 maxColl = getMaxCollateral(_cdpId, manager.ilks(_cdpId), _joinAddr); if (maxColl >= _exchangeData.srcAmount) { repay(_exchangeData, _cdpId, _gasCost, _joinAddr); return; } MCD_SAVER_FLASH_LOAN.transfer(msg.value); // 0x fee uint256 loanAmount = sub(_exchangeData.srcAmount, maxColl); uint maxLiq = getAvailableLiquidity(_joinAddr); loanAmount = loanAmount > maxLiq ? maxLiq : loanAmount; manager.cdpAllow(_cdpId, MCD_SAVER_FLASH_LOAN, 1); bytes memory paramsData = abi.encode(packExchangeData(_exchangeData), _cdpId, _gasCost, _joinAddr, true); lendingPool.flashLoan(MCD_SAVER_FLASH_LOAN, getAaveCollAddr(_joinAddr), loanAmount, paramsData); manager.cdpAllow(_cdpId, MCD_SAVER_FLASH_LOAN, 0); } /// @notice Gets the maximum amount of debt available to generate /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP function getMaxDebt(uint256 _cdpId, bytes32 _ilk) public override view returns (uint256) { uint256 price = getPrice(_ilk); (, uint256 mat) = spotter.ilks(_ilk); (uint256 collateral, uint256 debt) = getCdpInfo(manager, _cdpId, _ilk); return sub(wdiv(wmul(collateral, price), mat), debt); } function getAaveCollAddr(address _joinAddr) internal view returns (address) { if (_joinAddr == 0x2F0b23f53734252Bda2277357e97e1517d6B042A || _joinAddr == 0x775787933e92b709f2a3C70aa87999696e74A9F8) { return KYBER_ETH_ADDRESS; } else { return getCollateralAddr(_joinAddr); } } function getAvailableLiquidity(address _joinAddr) internal view returns (uint liquidity) { address tokenAddr = getAaveCollAddr(_joinAddr); if (tokenAddr == KYBER_ETH_ADDRESS) { liquidity = AAVE_POOL_CORE.balance; } else { liquidity = ERC20(tokenAddr).balanceOf(AAVE_POOL_CORE); } } function _packData( uint _cdpId, uint _gasCost, address _joinAddr, SaverExchangeCore.ExchangeData memory exchangeData ) internal pure returns (uint[6] memory numData, address[5] memory addrData, bytes memory callData) { numData = [ exchangeData.srcAmount, exchangeData.destAmount, exchangeData.minPrice, exchangeData.price0x, _cdpId, _gasCost ]; addrData = [ exchangeData.srcAddr, exchangeData.destAddr, exchangeData.exchangeAddr, exchangeData.wrapper, _joinAddr ]; callData = exchangeData.callData; } } contract SavingsProxy is DSRSavingsProtocol, CompoundSavingsProtocol { address public constant ADAI_ADDRESS = 0xfC1E690f61EFd961294b3e1Ce3313fBD8aa4f85d; address public constant SAVINGS_DYDX_ADDRESS = 0x03b1565e070df392e48e7a8e01798C4B00E534A5; address public constant SAVINGS_AAVE_ADDRESS = 0x535B9035E9bA8D7efe0FeAEac885fb65b303E37C; address public constant NEW_IDAI_ADDRESS = 0x493C57C4763932315A328269E1ADaD09653B9081; address public constant COMP_ADDRESS = 0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B; address public constant SAVINGS_LOGGER_ADDRESS = 0x89b3635BD2bAD145C6f92E82C9e83f06D5654984; address public constant SOLO_MARGIN_ADDRESS = 0x1E0447b19BB6EcFdAe1e4AE1694b0C3659614e4e; enum SavingsProtocol {Compound, Dydx, Fulcrum, Dsr, Aave} function deposit(SavingsProtocol _protocol, uint256 _amount) public { if (_protocol == SavingsProtocol.Dsr) { dsrDeposit(_amount, true); } else if (_protocol == SavingsProtocol.Compound) { compDeposit(msg.sender, _amount); } else { _deposit(_protocol, _amount, true); } SavingsLogger(SAVINGS_LOGGER_ADDRESS).logDeposit(msg.sender, uint8(_protocol), _amount); } function withdraw(SavingsProtocol _protocol, uint256 _amount) public { if (_protocol == SavingsProtocol.Dsr) { dsrWithdraw(_amount, true); } else if (_protocol == SavingsProtocol.Compound) { compWithdraw(msg.sender, _amount); } else { _withdraw(_protocol, _amount, true); } SavingsLogger(SAVINGS_LOGGER_ADDRESS).logWithdraw(msg.sender, uint8(_protocol), _amount); } function swap(SavingsProtocol _from, SavingsProtocol _to, uint256 _amount) public { if (_from == SavingsProtocol.Dsr) { dsrWithdraw(_amount, false); } else if (_from == SavingsProtocol.Compound) { compWithdraw(msg.sender, _amount); } else { _withdraw(_from, _amount, false); } // possible to withdraw 1-2 wei less than actual amount due to division precision // so we deposit all amount on DSProxy uint256 amountToDeposit = ERC20(DAI_ADDRESS).balanceOf(address(this)); if (_to == SavingsProtocol.Dsr) { dsrDeposit(amountToDeposit, false); } else if (_from == SavingsProtocol.Compound) { compDeposit(msg.sender, _amount); } else { _deposit(_to, amountToDeposit, false); } SavingsLogger(SAVINGS_LOGGER_ADDRESS).logSwap( msg.sender, uint8(_from), uint8(_to), _amount ); } function withdrawDai() public { ERC20(DAI_ADDRESS).transfer(msg.sender, ERC20(DAI_ADDRESS).balanceOf(address(this))); } function claimComp() public { ComptrollerInterface(COMP_ADDRESS).claimComp(address(this)); } function getAddress(SavingsProtocol _protocol) public pure returns (address) { if (_protocol == SavingsProtocol.Dydx) { return SAVINGS_DYDX_ADDRESS; } if (_protocol == SavingsProtocol.Aave) { return SAVINGS_AAVE_ADDRESS; } } function _deposit(SavingsProtocol _protocol, uint256 _amount, bool _fromUser) internal { if (_fromUser) { ERC20(DAI_ADDRESS).transferFrom(msg.sender, address(this), _amount); } approveDeposit(_protocol); ProtocolInterface(getAddress(_protocol)).deposit(address(this), _amount); endAction(_protocol); } function _withdraw(SavingsProtocol _protocol, uint256 _amount, bool _toUser) public { approveWithdraw(_protocol); ProtocolInterface(getAddress(_protocol)).withdraw(address(this), _amount); endAction(_protocol); if (_toUser) { withdrawDai(); } } function endAction(SavingsProtocol _protocol) internal { if (_protocol == SavingsProtocol.Dydx) { setDydxOperator(false); } } function approveDeposit(SavingsProtocol _protocol) internal { if (_protocol == SavingsProtocol.Compound || _protocol == SavingsProtocol.Fulcrum || _protocol == SavingsProtocol.Aave) { ERC20(DAI_ADDRESS).approve(getAddress(_protocol), uint256(-1)); } if (_protocol == SavingsProtocol.Dydx) { ERC20(DAI_ADDRESS).approve(SOLO_MARGIN_ADDRESS, uint256(-1)); setDydxOperator(true); } } function approveWithdraw(SavingsProtocol _protocol) internal { if (_protocol == SavingsProtocol.Compound) { ERC20(NEW_CDAI_ADDRESS).approve(getAddress(_protocol), uint256(-1)); } if (_protocol == SavingsProtocol.Dydx) { setDydxOperator(true); } if (_protocol == SavingsProtocol.Fulcrum) { ERC20(NEW_IDAI_ADDRESS).approve(getAddress(_protocol), uint256(-1)); } if (_protocol == SavingsProtocol.Aave) { ERC20(ADAI_ADDRESS).approve(getAddress(_protocol), uint256(-1)); } } function setDydxOperator(bool _trusted) internal { ISoloMargin.OperatorArg[] memory operatorArgs = new ISoloMargin.OperatorArg[](1); operatorArgs[0] = ISoloMargin.OperatorArg({ operator: getAddress(SavingsProtocol.Dydx), trusted: _trusted }); ISoloMargin(SOLO_MARGIN_ADDRESS).setOperators(operatorArgs); } } contract LoanShifterReceiver is SaverExchangeCore, FlashLoanReceiverBase, AdminAuth { ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; ShifterRegistry public constant shifterRegistry = ShifterRegistry(0x2612Af3A521c2df9EAF28422Ca335b04AdF3ac66); struct ParamData { bytes proxyData1; bytes proxyData2; address proxy; address debtAddr; uint8 protocol1; uint8 protocol2; uint8 swapType; } constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public {} function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { // Format the call data for DSProxy (ParamData memory paramData, ExchangeData memory exchangeData) = packFunctionCall(_amount, _fee, _params); address protocolAddr1 = shifterRegistry.getAddr(getNameByProtocol(paramData.protocol1)); address protocolAddr2 = shifterRegistry.getAddr(getNameByProtocol(paramData.protocol2)); // Send Flash loan amount to DSProxy sendToProxy(payable(paramData.proxy), _reserve, _amount); // Execute the Close/Change debt operation DSProxyInterface(paramData.proxy).execute(protocolAddr1, paramData.proxyData1); if (paramData.swapType == 1) { // COLL_SWAP exchangeData.srcAmount = getBalance(exchangeData.srcAddr); (, uint amount) = _sell(exchangeData); sendToProxy(payable(paramData.proxy), exchangeData.destAddr, amount); } else if (paramData.swapType == 2) { // DEBT_SWAP exchangeData.destAmount = (_amount + _fee); _buy(exchangeData); // Send extra to DSProxy sendToProxy(payable(paramData.proxy), exchangeData.srcAddr, ERC20(exchangeData.srcAddr).balanceOf(address(this))); } else { // NO_SWAP just send tokens to proxy sendToProxy(payable(paramData.proxy), exchangeData.srcAddr, getBalance(exchangeData.srcAddr)); } // Execute the Open operation DSProxyInterface(paramData.proxy).execute(protocolAddr2, paramData.proxyData2); // Repay FL transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } } function packFunctionCall(uint _amount, uint _fee, bytes memory _params) internal pure returns (ParamData memory paramData, ExchangeData memory exchangeData) { ( uint[8] memory numData, // collAmount, debtAmount, id1, id2, srcAmount, destAmount, minPrice, price0x address[8] memory addrData, // addrLoan1, addrLoan2, debtAddr1, debtAddr2, srcAddr, destAddr, exchangeAddr, wrapper uint8[3] memory enumData, // fromProtocol, toProtocol, swapType bytes memory callData, address proxy ) = abi.decode(_params, (uint256[8],address[8],uint8[3],bytes,address)); bytes memory proxyData1; bytes memory proxyData2; uint openDebtAmount = (_amount + _fee); if (enumData[0] == 0) { // MAKER FROM proxyData1 = abi.encodeWithSignature("close(uint256,address,uint256,uint256)", numData[2], addrData[0], _amount, numData[0]); } else if(enumData[0] == 1) { // COMPOUND FROM if (enumData[2] == 2) { // DEBT_SWAP proxyData1 = abi.encodeWithSignature("changeDebt(address,address,uint256,uint256)", addrData[2], addrData[3], (_amount + _fee), numData[4]); } else { proxyData1 = abi.encodeWithSignature("close(address,address,uint256,uint256)", addrData[0], addrData[2], numData[0], numData[1]); } } if (enumData[1] == 0) { // MAKER TO proxyData2 = abi.encodeWithSignature("open(uint256,address,uint256)", numData[3], addrData[1], openDebtAmount); } else if(enumData[1] == 1) { // COMPOUND TO if (enumData[2] == 2) { // DEBT_SWAP proxyData2 = abi.encodeWithSignature("repayAll(address)", addrData[3]); } else { proxyData2 = abi.encodeWithSignature("open(address,address,uint256)", addrData[1], addrData[3], openDebtAmount); } } paramData = ParamData({ proxyData1: proxyData1, proxyData2: proxyData2, proxy: proxy, debtAddr: addrData[2], protocol1: enumData[0], protocol2: enumData[1], swapType: enumData[2] }); exchangeData = SaverExchangeCore.ExchangeData({ srcAddr: addrData[4], destAddr: addrData[5], srcAmount: numData[4], destAmount: numData[5], minPrice: numData[6], wrapper: addrData[7], exchangeAddr: addrData[6], callData: callData, price0x: numData[7] }); } function sendToProxy(address payable _proxy, address _reserve, uint _amount) internal { if (_reserve != ETH_ADDRESS) { ERC20(_reserve).safeTransfer(_proxy, _amount); } _proxy.transfer(address(this).balance); } function getNameByProtocol(uint8 _proto) internal pure returns (string memory) { if (_proto == 0) { return "MCD_SHIFTER"; } else if (_proto == 1) { return "COMP_SHIFTER"; } } receive() external override(FlashLoanReceiverBase, SaverExchangeCore) payable {} } contract CompShifter is CompoundSaverHelper { address public constant COMPTROLLER_ADDR = 0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B; function getWholeDebt(uint _cdpId, address _joinAddr) public virtual returns(uint loanAmount) { return CTokenInterface(_joinAddr).borrowBalanceCurrent(msg.sender); } function close( address _cCollAddr, address _cBorrowAddr, uint _collAmount, uint _debtAmount ) public { address collAddr = getUnderlyingAddr(_cCollAddr); // payback debt paybackDebt(_debtAmount, _cBorrowAddr, getUnderlyingAddr(_cBorrowAddr), tx.origin); // draw coll if (CTokenInterface(_cBorrowAddr).borrowBalanceCurrent(address(this)) == 0) { uint cTokenBalance = CTokenInterface(_cCollAddr).balanceOf(address(this)); require(CTokenInterface(_cCollAddr).redeem(cTokenBalance) == 0); } else { require(CTokenInterface(_cCollAddr).redeemUnderlying(_collAmount) == 0); } // Send back money to repay FL if (collAddr == ETH_ADDRESS) { msg.sender.transfer(address(this).balance); } else { ERC20(collAddr).transfer(msg.sender, ERC20(collAddr).balanceOf(address(this))); } } function changeDebt( address _cBorrowAddrOld, address _cBorrowAddrNew, uint _debtAmountOld, uint _debtAmountNew ) public { address borrowAddrNew = getUnderlyingAddr(_cBorrowAddrNew); // payback debt in one token paybackDebt(_debtAmountOld, _cBorrowAddrOld, getUnderlyingAddr(_cBorrowAddrOld), tx.origin); // draw debt in another one borrowCompound(_cBorrowAddrNew, _debtAmountNew); // Send back money to repay FL if (borrowAddrNew == ETH_ADDRESS) { msg.sender.transfer(address(this).balance); } else { ERC20(borrowAddrNew).transfer(msg.sender, ERC20(borrowAddrNew).balanceOf(address(this))); } } function open( address _cCollAddr, address _cBorrowAddr, uint _debtAmount ) public { address collAddr = getUnderlyingAddr(_cCollAddr); address borrowAddr = getUnderlyingAddr(_cBorrowAddr); uint collAmount = 0; if (collAddr == ETH_ADDRESS) { collAmount = address(this).balance; } else { collAmount = ERC20(collAddr).balanceOf(address(this)); } depositCompound(collAddr, _cCollAddr, collAmount); // draw debt borrowCompound(_cBorrowAddr, _debtAmount); // Send back money to repay FL if (borrowAddr == ETH_ADDRESS) { msg.sender.transfer(address(this).balance); } else { ERC20(borrowAddr).transfer(msg.sender, ERC20(borrowAddr).balanceOf(address(this))); } } function repayAll(address _cTokenAddr) public { address tokenAddr = getUnderlyingAddr(_cTokenAddr); uint amount = ERC20(tokenAddr).balanceOf(address(this)); if (amount != 0) { paybackDebt(amount, _cTokenAddr, tokenAddr, tx.origin); } } function depositCompound(address _tokenAddr, address _cTokenAddr, uint _amount) internal { approveCToken(_tokenAddr, _cTokenAddr); enterMarket(_cTokenAddr); if (_tokenAddr != ETH_ADDRESS) { require(CTokenInterface(_cTokenAddr).mint(_amount) == 0, "mint error"); } else { CEtherInterface(_cTokenAddr).mint{value: _amount}(); } } function borrowCompound(address _cTokenAddr, uint _amount) internal { enterMarket(_cTokenAddr); require(CTokenInterface(_cTokenAddr).borrow(_amount) == 0); } function enterMarket(address _cTokenAddr) public { address[] memory markets = new address[](1); markets[0] = _cTokenAddr; ComptrollerInterface(COMPTROLLER_ADDR).enterMarkets(markets); } } contract McdShifter is MCDSaverProxy { address public constant OPEN_PROXY_ACTIONS = 0x6d0984E80a86f26c0dd564ca0CF74a8E9Da03305; function getLoanAmount(uint _cdpId, address _joinAddr) public view virtual returns(uint loanAmount) { bytes32 ilk = manager.ilks(_cdpId); (, uint rate,,,) = vat.ilks(ilk); (, uint art) = vat.urns(ilk, manager.urns(_cdpId)); uint dai = vat.dai(manager.urns(_cdpId)); uint rad = sub(mul(art, rate), dai); loanAmount = rad / RAY; loanAmount = mul(loanAmount, RAY) < rad ? loanAmount + 1 : loanAmount; } function close( uint _cdpId, address _joinAddr, uint _loanAmount, uint _collateral ) public { address owner = getOwner(manager, _cdpId); bytes32 ilk = manager.ilks(_cdpId); (uint maxColl, ) = getCdpInfo(manager, _cdpId, ilk); // repay dai debt cdp paybackDebt(_cdpId, ilk, _loanAmount, owner); maxColl = _collateral > maxColl ? maxColl : _collateral; // withdraw collateral from cdp drawMaxCollateral(_cdpId, _joinAddr, maxColl); // send back to msg.sender if (_joinAddr == ETH_JOIN_ADDRESS) { msg.sender.transfer(address(this).balance); } else { ERC20 collToken = ERC20(getCollateralAddr(_joinAddr)); collToken.transfer(msg.sender, collToken.balanceOf(address(this))); } } function open( uint _cdpId, address _joinAddr, uint _debtAmount ) public { uint collAmount = 0; if (_joinAddr == ETH_JOIN_ADDRESS) { collAmount = address(this).balance; } else { collAmount = ERC20(address(Join(_joinAddr).gem())).balanceOf(address(this)); } if (_cdpId == 0) { openAndWithdraw(collAmount, _debtAmount, address(this), _joinAddr); } else { // add collateral addCollateral(_cdpId, _joinAddr, collAmount); // draw debt drawDai(_cdpId, manager.ilks(_cdpId), _debtAmount); } // transfer to repay FL ERC20(DAI_ADDRESS).transfer(msg.sender, ERC20(DAI_ADDRESS).balanceOf(address(this))); if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } } function openAndWithdraw(uint _collAmount, uint _debtAmount, address _proxy, address _joinAddrTo) internal { bytes32 ilk = Join(_joinAddrTo).ilk(); if (_joinAddrTo == ETH_JOIN_ADDRESS) { MCDCreateProxyActions(OPEN_PROXY_ACTIONS).openLockETHAndDraw{value: address(this).balance}( address(manager), JUG_ADDRESS, ETH_JOIN_ADDRESS, DAI_JOIN_ADDRESS, ilk, _debtAmount, _proxy ); } else { ERC20(getCollateralAddr(_joinAddrTo)).approve(OPEN_PROXY_ACTIONS, uint256(-1)); MCDCreateProxyActions(OPEN_PROXY_ACTIONS).openLockGemAndDraw( address(manager), JUG_ADDRESS, _joinAddrTo, DAI_JOIN_ADDRESS, ilk, _collAmount, _debtAmount, true, _proxy ); } } function drawMaxCollateral(uint _cdpId, address _joinAddr, uint _amount) internal returns (uint) { manager.frob(_cdpId, -toPositiveInt(_amount), 0); manager.flux(_cdpId, address(this), _amount); uint joinAmount = _amount; if (Join(_joinAddr).dec() != 18) { joinAmount = _amount / (10 ** (18 - Join(_joinAddr).dec())); } Join(_joinAddr).exit(address(this), joinAmount); if (_joinAddr == ETH_JOIN_ADDRESS) { Join(_joinAddr).gem().withdraw(joinAmount); // Weth -> Eth } return joinAmount; } } contract AaveSaverProxy is GasBurner, SaverExchangeCore, AaveHelper { address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; uint public constant VARIABLE_RATE = 2; function repay(ExchangeData memory _data, uint _gasCost) public payable burnGas(20) { address lendingPoolCore = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); address payable user = payable(getUserAddress()); uint256 maxCollateral = getMaxCollateral(_data.srcAddr, address(this)); // don't swap more than maxCollateral _data.srcAmount = _data.srcAmount > maxCollateral ? maxCollateral : _data.srcAmount; // redeem collateral address aTokenCollateral = ILendingPool(lendingPoolCore).getReserveATokenAddress(_data.srcAddr); IAToken(aTokenCollateral).redeem(_data.srcAmount); // swap (, uint256 destAmount) = _sell(_data); destAmount -= getFee(destAmount, user, _gasCost, _data.destAddr); // payback if (_data.destAddr == ETH_ADDR) { ILendingPool(lendingPool).repay{value: destAmount}(_data.destAddr, destAmount, payable(address(this))); } else { approveToken(_data.destAddr, lendingPoolCore); ILendingPool(lendingPool).repay(_data.destAddr, destAmount, payable(address(this))); } // first return 0x fee to msg.sender as it is the address that actually sent 0x fee sendContractBalance(ETH_ADDR, msg.sender, min(address(this).balance, msg.value)); // send all leftovers from dest addr to proxy owner sendFullContractBalance(_data.destAddr, user); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "AaveRepay", abi.encode(_data.srcAddr, _data.destAddr, _data.srcAmount, destAmount)); } function boost(ExchangeData memory _data, uint _gasCost) public payable burnGas(20) { address lendingPoolCore = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); (,,,,,,,,,bool collateralEnabled) = ILendingPool(lendingPool).getUserReserveData(_data.destAddr, address(this)); address payable user = payable(getUserAddress()); uint256 maxBorrow = getMaxBorrow(_data.srcAddr, address(this)); _data.srcAmount = _data.srcAmount > maxBorrow ? maxBorrow : _data.srcAmount; // borrow amount ILendingPool(lendingPool).borrow(_data.srcAddr, _data.srcAmount, VARIABLE_RATE, AAVE_REFERRAL_CODE); _data.srcAmount -= getFee(_data.srcAmount, user, _gasCost, _data.srcAddr); // swap (, uint256 destAmount) = _sell(_data); if (_data.destAddr == ETH_ADDR) { ILendingPool(lendingPool).deposit{value: destAmount}(_data.destAddr, destAmount, AAVE_REFERRAL_CODE); } else { approveToken(_data.destAddr, lendingPoolCore); ILendingPool(lendingPool).deposit(_data.destAddr, destAmount, AAVE_REFERRAL_CODE); } if (!collateralEnabled) { ILendingPool(lendingPool).setUserUseReserveAsCollateral(_data.destAddr, true); } // returning to msg.sender as it is the address that actually sent 0x fee sendContractBalance(ETH_ADDR, msg.sender, min(address(this).balance, msg.value)); // send all leftovers from dest addr to proxy owner sendFullContractBalance(_data.destAddr, user); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "AaveBoost", abi.encode(_data.srcAddr, _data.destAddr, _data.srcAmount, destAmount)); } } contract CompoundLoanInfo is CompoundSafetyRatio { struct LoanData { address user; uint128 ratio; address[] collAddr; address[] borrowAddr; uint[] collAmounts; uint[] borrowAmounts; } struct TokenInfo { address cTokenAddress; address underlyingTokenAddress; uint collateralFactor; uint price; } struct TokenInfoFull { address underlyingTokenAddress; uint supplyRate; uint borrowRate; uint exchangeRate; uint marketLiquidity; uint totalSupply; uint totalBorrow; uint collateralFactor; uint price; } address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant CETH_ADDRESS = 0x4Ddc2D193948926D02f9B1fE9e1daa0718270ED5; /// @notice Calcualted the ratio of coll/debt for a compound user /// @param _user Address of the user function getRatio(address _user) public view returns (uint) { // For each asset the account is in return getSafetyRatio(_user); } /// @notice Fetches Compound prices for tokens /// @param _cTokens Arr. of cTokens for which to get the prices /// @return prices Array of prices function getPrices(address[] memory _cTokens) public view returns (uint[] memory prices) { prices = new uint[](_cTokens.length); address oracleAddr = comp.oracle(); for (uint i = 0; i < _cTokens.length; ++i) { prices[i] = CompoundOracleInterface(oracleAddr).getUnderlyingPrice(_cTokens[i]); } } /// @notice Fetches Compound collateral factors for tokens /// @param _cTokens Arr. of cTokens for which to get the coll. factors /// @return collFactors Array of coll. factors function getCollFactors(address[] memory _cTokens) public view returns (uint[] memory collFactors) { collFactors = new uint[](_cTokens.length); for (uint i = 0; i < _cTokens.length; ++i) { (, collFactors[i]) = comp.markets(_cTokens[i]); } } /// @notice Fetches all the collateral/debt address and amounts, denominated in usd /// @param _user Address of the user /// @return data LoanData information function getLoanData(address _user) public view returns (LoanData memory data) { address[] memory assets = comp.getAssetsIn(_user); address oracleAddr = comp.oracle(); data = LoanData({ user: _user, ratio: 0, collAddr: new address[](assets.length), borrowAddr: new address[](assets.length), collAmounts: new uint[](assets.length), borrowAmounts: new uint[](assets.length) }); uint collPos = 0; uint borrowPos = 0; for (uint i = 0; i < assets.length; i++) { address asset = assets[i]; (, uint cTokenBalance, uint borrowBalance, uint exchangeRateMantissa) = CTokenInterface(asset).getAccountSnapshot(_user); Exp memory oraclePrice; if (cTokenBalance != 0 || borrowBalance != 0) { oraclePrice = Exp({mantissa: CompoundOracleInterface(oracleAddr).getUnderlyingPrice(asset)}); } // Sum up collateral in Usd if (cTokenBalance != 0) { Exp memory exchangeRate = Exp({mantissa: exchangeRateMantissa}); (, Exp memory tokensToUsd) = mulExp(exchangeRate, oraclePrice); data.collAddr[collPos] = asset; (, data.collAmounts[collPos]) = mulScalarTruncate(tokensToUsd, cTokenBalance); collPos++; } // Sum up debt in Usd if (borrowBalance != 0) { data.borrowAddr[borrowPos] = asset; (, data.borrowAmounts[borrowPos]) = mulScalarTruncate(oraclePrice, borrowBalance); borrowPos++; } } data.ratio = uint128(getSafetyRatio(_user)); return data; } function getTokenBalances(address _user, address[] memory _cTokens) public view returns (uint[] memory balances, uint[] memory borrows) { balances = new uint[](_cTokens.length); borrows = new uint[](_cTokens.length); for (uint i = 0; i < _cTokens.length; i++) { address asset = _cTokens[i]; (, uint cTokenBalance, uint borrowBalance, uint exchangeRateMantissa) = CTokenInterface(asset).getAccountSnapshot(_user); Exp memory exchangeRate = Exp({mantissa: exchangeRateMantissa}); (, balances[i]) = mulScalarTruncate(exchangeRate, cTokenBalance); borrows[i] = borrowBalance; } } /// @notice Fetches all the collateral/debt address and amounts, denominated in usd /// @param _users Addresses of the user /// @return loans Array of LoanData information function getLoanDataArr(address[] memory _users) public view returns (LoanData[] memory loans) { loans = new LoanData[](_users.length); for (uint i = 0; i < _users.length; ++i) { loans[i] = getLoanData(_users[i]); } } /// @notice Calcualted the ratio of coll/debt for a compound user /// @param _users Addresses of the user /// @return ratios Array of ratios function getRatios(address[] memory _users) public view returns (uint[] memory ratios) { ratios = new uint[](_users.length); for (uint i = 0; i < _users.length; ++i) { ratios[i] = getSafetyRatio(_users[i]); } } /// @notice Information about cTokens /// @param _cTokenAddresses Array of cTokens addresses /// @return tokens Array of cTokens infomartion function getTokensInfo(address[] memory _cTokenAddresses) public returns(TokenInfo[] memory tokens) { tokens = new TokenInfo[](_cTokenAddresses.length); address oracleAddr = comp.oracle(); for (uint i = 0; i < _cTokenAddresses.length; ++i) { (, uint collFactor) = comp.markets(_cTokenAddresses[i]); tokens[i] = TokenInfo({ cTokenAddress: _cTokenAddresses[i], underlyingTokenAddress: getUnderlyingAddr(_cTokenAddresses[i]), collateralFactor: collFactor, price: CompoundOracleInterface(oracleAddr).getUnderlyingPrice(_cTokenAddresses[i]) }); } } /// @notice Information about cTokens /// @param _cTokenAddresses Array of cTokens addresses /// @return tokens Array of cTokens infomartion function getFullTokensInfo(address[] memory _cTokenAddresses) public returns(TokenInfoFull[] memory tokens) { tokens = new TokenInfoFull[](_cTokenAddresses.length); address oracleAddr = comp.oracle(); for (uint i = 0; i < _cTokenAddresses.length; ++i) { (, uint collFactor) = comp.markets(_cTokenAddresses[i]); CTokenInterface cToken = CTokenInterface(_cTokenAddresses[i]); tokens[i] = TokenInfoFull({ underlyingTokenAddress: getUnderlyingAddr(_cTokenAddresses[i]), supplyRate: cToken.supplyRatePerBlock(), borrowRate: cToken.borrowRatePerBlock(), exchangeRate: cToken.exchangeRateCurrent(), marketLiquidity: cToken.getCash(), totalSupply: cToken.totalSupply(), totalBorrow: cToken.totalBorrowsCurrent(), collateralFactor: collFactor, price: CompoundOracleInterface(oracleAddr).getUnderlyingPrice(_cTokenAddresses[i]) }); } } /// @notice Returns the underlying address of the cToken asset /// @param _cTokenAddress cToken address /// @return Token address of the cToken specified function getUnderlyingAddr(address _cTokenAddress) internal returns (address) { if (_cTokenAddress == CETH_ADDRESS) { return ETH_ADDRESS; } else { return CTokenInterface(_cTokenAddress).underlying(); } } } contract CompoundCreateReceiver is FlashLoanReceiverBase, SaverExchangeCore { ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); ShifterRegistry public constant shifterRegistry = ShifterRegistry(0x2E82103bD91053C781aaF39da17aE58ceE39d0ab); address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address payable public constant WALLET_ADDR = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; address public constant DISCOUNT_ADDR = 0x1b14E8D511c9A4395425314f849bD737BAF8208F; // solhint-disable-next-line no-empty-blocks constructor() public FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) {} /// @notice Called by Aave when sending back the FL amount /// @param _reserve The address of the borrowed token /// @param _amount Amount of FL tokens received /// @param _fee FL Aave fee /// @param _params The params that are sent from the original FL caller contract function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { // Format the call data for DSProxy (address payable proxyAddr, bytes memory proxyData, ExchangeData memory exchangeData) = packFunctionCall(_amount, _fee, _params); // Swap (, uint sellAmount) = _sell(exchangeData); // DFS fee getFee(sellAmount, exchangeData.destAddr, proxyAddr); // Send amount to DSProxy sendToProxy(proxyAddr, exchangeData.destAddr); address compOpenProxy = shifterRegistry.getAddr("COMP_SHIFTER"); // Execute the DSProxy call DSProxyInterface(proxyAddr).execute(compOpenProxy, proxyData); // Repay the loan with the money DSProxy sent back transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { // solhint-disable-next-line avoid-tx-origin tx.origin.transfer(address(this).balance); } } /// @notice Formats function data call so we can call it through DSProxy /// @param _amount Amount of FL /// @param _fee Fee of the FL /// @param _params Saver proxy params function packFunctionCall(uint _amount, uint _fee, bytes memory _params) internal pure returns (address payable, bytes memory proxyData, ExchangeData memory exchangeData) { ( uint[4] memory numData, // srcAmount, destAmount, minPrice, price0x address[6] memory cAddresses, // cCollAddr, cDebtAddr, srcAddr, destAddr, exchangeAddr, wrapper bytes memory callData, address proxy ) = abi.decode(_params, (uint256[4],address[6],bytes,address)); proxyData = abi.encodeWithSignature( "open(address,address,uint256)", cAddresses[0], cAddresses[1], (_amount + _fee)); exchangeData = SaverExchangeCore.ExchangeData({ srcAddr: cAddresses[2], destAddr: cAddresses[3], srcAmount: numData[0], destAmount: numData[1], minPrice: numData[2], wrapper: cAddresses[5], exchangeAddr: cAddresses[4], callData: callData, price0x: numData[3] }); return (payable(proxy), proxyData, exchangeData); } /// @notice Send the FL funds received to DSProxy /// @param _proxy DSProxy address /// @param _reserve Token address function sendToProxy(address payable _proxy, address _reserve) internal { if (_reserve != ETH_ADDRESS) { ERC20(_reserve).safeTransfer(_proxy, ERC20(_reserve).balanceOf(address(this))); } else { _proxy.transfer(address(this).balance); } } function getFee(uint _amount, address _tokenAddr, address _proxy) internal returns (uint feeAmount) { uint fee = 400; DSProxy proxy = DSProxy(payable(_proxy)); address user = proxy.owner(); if (Discount(DISCOUNT_ADDR).isCustomFeeSet(user)) { fee = Discount(DISCOUNT_ADDR).getCustomServiceFee(user); } feeAmount = (fee == 0) ? 0 : (_amount / fee); // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } if (_tokenAddr == ETH_ADDRESS) { WALLET_ADDR.transfer(feeAmount); } else { ERC20(_tokenAddr).safeTransfer(WALLET_ADDR, feeAmount); } } // solhint-disable-next-line no-empty-blocks receive() external override(FlashLoanReceiverBase, SaverExchangeCore) payable {} } contract CompoundSaverFlashLoan is FlashLoanReceiverBase, SaverExchangeCore { ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); address payable public COMPOUND_SAVER_FLASH_PROXY = 0xBcEAb469CbBA225E9dc9Cbd898808A4742687096; address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public owner; using SafeERC20 for ERC20; constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public { owner = msg.sender; } /// @notice Called by Aave when sending back the FL amount /// @param _reserve The address of the borrowed token /// @param _amount Amount of FL tokens received /// @param _fee FL Aave fee /// @param _params The params that are sent from the original FL caller contract function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { // Format the call data for DSProxy (bytes memory proxyData, address payable proxyAddr) = packFunctionCall(_amount, _fee, _params); // Send Flash loan amount to DSProxy sendLoanToProxy(proxyAddr, _reserve, _amount); // Execute the DSProxy call DSProxyInterface(proxyAddr).execute(COMPOUND_SAVER_FLASH_PROXY, proxyData); // Repay the loan with the money DSProxy sent back transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } } /// @notice Formats function data call so we can call it through DSProxy /// @param _amount Amount of FL /// @param _fee Fee of the FL /// @param _params Saver proxy params /// @return proxyData Formated function call data function packFunctionCall(uint _amount, uint _fee, bytes memory _params) internal pure returns (bytes memory proxyData, address payable) { ( bytes memory exDataBytes, address[2] memory cAddresses, // cCollAddress, cBorrowAddress uint256 gasCost, bool isRepay, address payable proxyAddr ) = abi.decode(_params, (bytes,address[2],uint256,bool,address)); ExchangeData memory _exData = unpackExchangeData(exDataBytes); uint[2] memory flashLoanData = [_amount, _fee]; if (isRepay) { proxyData = abi.encodeWithSignature("flashRepay((address,address,uint256,uint256,uint256,address,address,bytes,uint256),address[2],uint256,uint256[2])", _exData, cAddresses, gasCost, flashLoanData); } else { proxyData = abi.encodeWithSignature("flashBoost((address,address,uint256,uint256,uint256,address,address,bytes,uint256),address[2],uint256,uint256[2])", _exData, cAddresses, gasCost, flashLoanData); } return (proxyData, proxyAddr); } /// @notice Send the FL funds received to DSProxy /// @param _proxy DSProxy address /// @param _reserve Token address /// @param _amount Amount of tokens function sendLoanToProxy(address payable _proxy, address _reserve, uint _amount) internal { if (_reserve != ETH_ADDRESS) { ERC20(_reserve).safeTransfer(_proxy, _amount); } _proxy.transfer(address(this).balance); } receive() external override(SaverExchangeCore, FlashLoanReceiverBase) payable {} } contract CompoundSaverFlashProxy is SaverExchangeCore, CompoundSaverHelper { address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; using SafeERC20 for ERC20; /// @notice Repays the position and sends tokens back for FL /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress] /// @param _gasCost Gas cost for transaction /// @param _flashLoanData Data about FL [amount, fee] function flashRepay( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost, uint[2] memory _flashLoanData // amount, fee ) public payable { enterMarket(_cAddresses[0], _cAddresses[1]); address payable user = payable(getUserAddress()); uint flashBorrowed = _flashLoanData[0] + _flashLoanData[1]; uint maxColl = getMaxCollateral(_cAddresses[0], address(this)); // draw max coll require(CTokenInterface(_cAddresses[0]).redeemUnderlying(maxColl) == 0); address collToken = getUnderlyingAddr(_cAddresses[0]); address borrowToken = getUnderlyingAddr(_cAddresses[1]); uint swapAmount = 0; if (collToken != borrowToken) { // swap max coll + loanAmount _exData.srcAmount = maxColl + _flashLoanData[0]; (,swapAmount) = _sell(_exData); // get fee swapAmount -= getFee(swapAmount, user, _gasCost, _cAddresses[1]); } else { swapAmount = (maxColl + _flashLoanData[0]); swapAmount -= getGasCost(swapAmount, _gasCost, _cAddresses[1]); } // payback debt paybackDebt(swapAmount, _cAddresses[1], borrowToken, user); // draw collateral for loanAmount + loanFee require(CTokenInterface(_cAddresses[0]).redeemUnderlying(flashBorrowed) == 0); // repay flash loan returnFlashLoan(collToken, flashBorrowed); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "CompoundRepay", abi.encode(_exData.srcAmount, swapAmount, collToken, borrowToken)); } /// @notice Boosts the position and sends tokens back for FL /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress] /// @param _gasCost Gas cost for specific transaction /// @param _flashLoanData Data about FL [amount, fee] function flashBoost( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost, uint[2] memory _flashLoanData // amount, fee ) public payable { enterMarket(_cAddresses[0], _cAddresses[1]); address payable user = payable(getUserAddress()); uint flashBorrowed = _flashLoanData[0] + _flashLoanData[1]; // borrow max amount uint borrowAmount = getMaxBorrow(_cAddresses[1], address(this)); require(CTokenInterface(_cAddresses[1]).borrow(borrowAmount) == 0); address collToken = getUnderlyingAddr(_cAddresses[0]); address borrowToken = getUnderlyingAddr(_cAddresses[1]); uint swapAmount = 0; if (collToken != borrowToken) { // get dfs fee borrowAmount -= getFee((borrowAmount + _flashLoanData[0]), user, _gasCost, _cAddresses[1]); _exData.srcAmount = (borrowAmount + _flashLoanData[0]); (,swapAmount) = _sell(_exData); } else { swapAmount = (borrowAmount + _flashLoanData[0]); swapAmount -= getGasCost(swapAmount, _gasCost, _cAddresses[1]); } // deposit swaped collateral depositCollateral(collToken, _cAddresses[0], swapAmount); // borrow token to repay flash loan require(CTokenInterface(_cAddresses[1]).borrow(flashBorrowed) == 0); // repay flash loan returnFlashLoan(borrowToken, flashBorrowed); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "CompoundBoost", abi.encode(_exData.srcAmount, swapAmount, collToken, borrowToken)); } /// @notice Helper method to deposit tokens in Compound /// @param _collToken Token address of the collateral /// @param _cCollToken CToken address of the collateral /// @param _depositAmount Amount to deposit function depositCollateral(address _collToken, address _cCollToken, uint _depositAmount) internal { approveCToken(_collToken, _cCollToken); if (_collToken != ETH_ADDRESS) { require(CTokenInterface(_cCollToken).mint(_depositAmount) == 0); } else { CEtherInterface(_cCollToken).mint{value: _depositAmount}(); // reverts on fail } } /// @notice Returns the tokens/ether to the msg.sender which is the FL contract /// @param _tokenAddr Address of token which we return /// @param _amount Amount to return function returnFlashLoan(address _tokenAddr, uint _amount) internal { if (_tokenAddr != ETH_ADDRESS) { ERC20(_tokenAddr).safeTransfer(msg.sender, _amount); } msg.sender.transfer(address(this).balance); } } contract CompoundSaverProxy is CompoundSaverHelper, SaverExchangeCore { DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); /// @notice Withdraws collateral, converts to borrowed token and repays debt /// @dev Called through the DSProxy /// @param _exData Exchange data /// @param _cAddresses Coll/Debt addresses [cCollAddress, cBorrowAddress] /// @param _gasCost Gas cost for specific transaction function repay( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost ) public payable { enterMarket(_cAddresses[0], _cAddresses[1]); address payable user = payable(getUserAddress()); uint maxColl = getMaxCollateral(_cAddresses[0], address(this)); uint collAmount = (_exData.srcAmount > maxColl) ? maxColl : _exData.srcAmount; require(CTokenInterface(_cAddresses[0]).redeemUnderlying(collAmount) == 0); address collToken = getUnderlyingAddr(_cAddresses[0]); address borrowToken = getUnderlyingAddr(_cAddresses[1]); uint swapAmount = 0; if (collToken != borrowToken) { (, swapAmount) = _sell(_exData); swapAmount -= getFee(swapAmount, user, _gasCost, _cAddresses[1]); } else { swapAmount = collAmount; swapAmount -= getGasCost(swapAmount, _gasCost, _cAddresses[1]); } paybackDebt(swapAmount, _cAddresses[1], borrowToken, user); // handle 0x fee tx.origin.transfer(address(this).balance); // log amount, collToken, borrowToken logger.Log(address(this), msg.sender, "CompoundRepay", abi.encode(_exData.srcAmount, swapAmount, collToken, borrowToken)); } /// @notice Borrows token, converts to collateral, and adds to position /// @dev Called through the DSProxy /// @param _exData Exchange data /// @param _cAddresses Coll/Debt addresses [cCollAddress, cBorrowAddress] /// @param _gasCost Gas cost for specific transaction function boost( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost ) public payable { enterMarket(_cAddresses[0], _cAddresses[1]); address payable user = payable(getUserAddress()); uint maxBorrow = getMaxBorrow(_cAddresses[1], address(this)); uint borrowAmount = (_exData.srcAmount > maxBorrow) ? maxBorrow : _exData.srcAmount; require(CTokenInterface(_cAddresses[1]).borrow(borrowAmount) == 0); address collToken = getUnderlyingAddr(_cAddresses[0]); address borrowToken = getUnderlyingAddr(_cAddresses[1]); uint swapAmount = 0; if (collToken != borrowToken) { borrowAmount -= getFee(borrowAmount, user, _gasCost, _cAddresses[1]); _exData.srcAmount = borrowAmount; (,swapAmount) = _sell(_exData); } else { swapAmount = borrowAmount; swapAmount -= getGasCost(swapAmount, _gasCost, _cAddresses[1]); } approveCToken(collToken, _cAddresses[0]); if (collToken != ETH_ADDRESS) { require(CTokenInterface(_cAddresses[0]).mint(swapAmount) == 0); } else { CEtherInterface(_cAddresses[0]).mint{value: swapAmount}(); // reverts on fail } // handle 0x fee tx.origin.transfer(address(this).balance); // log amount, collToken, borrowToken logger.Log(address(this), msg.sender, "CompoundBoost", abi.encode(_exData.srcAmount, swapAmount, collToken, borrowToken)); } } contract SaverExchange is SaverExchangeCore, AdminAuth, GasBurner { using SafeERC20 for ERC20; uint256 public constant SERVICE_FEE = 800; // 0.125% Fee // solhint-disable-next-line const-name-snakecase DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); uint public burnAmount = 10; /// @notice Takes a src amount of tokens and converts it into the dest token /// @dev Takes fee from the _srcAmount before the exchange /// @param exData [srcAddr, destAddr, srcAmount, destAmount, minPrice, exchangeType, exchangeAddr, callData, price0x] /// @param _user User address who called the exchange function sell(ExchangeData memory exData, address payable _user) public payable burnGas(burnAmount) { // take fee uint dfsFee = getFee(exData.srcAmount, exData.srcAddr); exData.srcAmount = sub(exData.srcAmount, dfsFee); // Perform the exchange (address wrapper, uint destAmount) = _sell(exData); // send back any leftover ether or tokens sendLeftover(exData.srcAddr, exData.destAddr, _user); // log the event logger.Log(address(this), msg.sender, "ExchangeSell", abi.encode(wrapper, exData.srcAddr, exData.destAddr, exData.srcAmount, destAmount)); } /// @notice Takes a dest amount of tokens and converts it from the src token /// @dev Send always more than needed for the swap, extra will be returned /// @param exData [srcAddr, destAddr, srcAmount, destAmount, minPrice, exchangeType, exchangeAddr, callData, price0x] /// @param _user User address who called the exchange function buy(ExchangeData memory exData, address payable _user) public payable burnGas(burnAmount){ uint dfsFee = getFee(exData.srcAmount, exData.srcAddr); exData.srcAmount = sub(exData.srcAmount, dfsFee); // Perform the exchange (address wrapper, uint srcAmount) = _buy(exData); // send back any leftover ether or tokens sendLeftover(exData.srcAddr, exData.destAddr, _user); // log the event logger.Log(address(this), msg.sender, "ExchangeBuy", abi.encode(wrapper, exData.srcAddr, exData.destAddr, srcAmount, exData.destAmount)); } /// @notice Takes a feePercentage and sends it to wallet /// @param _amount Dai amount of the whole trade /// @param _token Address of the token /// @return feeAmount Amount in Dai owner earned on the fee function getFee(uint256 _amount, address _token) internal returns (uint256 feeAmount) { uint256 fee = SERVICE_FEE; if (Discount(DISCOUNT_ADDRESS).isCustomFeeSet(msg.sender)) { fee = Discount(DISCOUNT_ADDRESS).getCustomServiceFee(msg.sender); } if (fee == 0) { feeAmount = 0; } else { feeAmount = _amount / fee; if (_token == KYBER_ETH_ADDRESS) { WALLET_ID.transfer(feeAmount); } else { ERC20(_token).safeTransfer(WALLET_ID, feeAmount); } } } /// @notice Changes the amount of gas token we burn for each call /// @dev Only callable by the owner /// @param _newBurnAmount New amount of gas tokens to be burned function changeBurnAmount(uint _newBurnAmount) public { require(owner == msg.sender); burnAmount = _newBurnAmount; } } contract MCDSaverFlashLoan is MCDSaverProxy, AdminAuth, FlashLoanReceiverBase { ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public {} struct SaverData { uint cdpId; uint gasCost; uint loanAmount; uint fee; address joinAddr; } function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { //check the contract has the specified balance require(_amount <= getBalanceInternal(address(this), _reserve), "Invalid balance for the contract"); ( bytes memory exDataBytes, uint cdpId, uint gasCost, address joinAddr, bool isRepay ) = abi.decode(_params, (bytes,uint256,uint256,address,bool)); ExchangeData memory exchangeData = unpackExchangeData(exDataBytes); SaverData memory saverData = SaverData({ cdpId: cdpId, gasCost: gasCost, loanAmount: _amount, fee: _fee, joinAddr: joinAddr }); if (isRepay) { repayWithLoan(exchangeData, saverData); } else { boostWithLoan(exchangeData, saverData); } transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } } function boostWithLoan( ExchangeData memory _exchangeData, SaverData memory _saverData ) internal { address user = getOwner(manager, _saverData.cdpId); // Draw users Dai uint maxDebt = getMaxDebt(_saverData.cdpId, manager.ilks(_saverData.cdpId)); uint daiDrawn = drawDai(_saverData.cdpId, manager.ilks(_saverData.cdpId), maxDebt); // Calc. fees uint dsfFee = getFee((daiDrawn + _saverData.loanAmount), _saverData.gasCost, user); uint afterFee = (daiDrawn + _saverData.loanAmount) - dsfFee; // Swap _exchangeData.srcAmount = afterFee; (, uint swapedAmount) = _sell(_exchangeData); // Return collateral addCollateral(_saverData.cdpId, _saverData.joinAddr, swapedAmount); // Draw Dai to repay the flash loan drawDai(_saverData.cdpId, manager.ilks(_saverData.cdpId), (_saverData.loanAmount + _saverData.fee)); logger.Log(address(this), msg.sender, "MCDFlashBoost", abi.encode(_saverData.cdpId, owner, _exchangeData.srcAmount, swapedAmount)); } function repayWithLoan( ExchangeData memory _exchangeData, SaverData memory _saverData ) internal { address user = getOwner(manager, _saverData.cdpId); bytes32 ilk = manager.ilks(_saverData.cdpId); // Draw collateral uint maxColl = getMaxCollateral(_saverData.cdpId, ilk, _saverData.joinAddr); uint collDrawn = drawCollateral(_saverData.cdpId, _saverData.joinAddr, maxColl); // Swap _exchangeData.srcAmount = (_saverData.loanAmount + collDrawn); (, uint swapedAmount) = _sell(_exchangeData); uint paybackAmount = (swapedAmount - getFee(swapedAmount, _saverData.gasCost, user)); paybackAmount = limitLoanAmount(_saverData.cdpId, ilk, paybackAmount, user); // Payback the debt paybackDebt(_saverData.cdpId, ilk, paybackAmount, user); // Draw collateral to repay the flash loan drawCollateral(_saverData.cdpId, _saverData.joinAddr, (_saverData.loanAmount + _saverData.fee)); logger.Log(address(this), msg.sender, "MCDFlashRepay", abi.encode(_saverData.cdpId, owner, _exchangeData.srcAmount, swapedAmount)); } /// @notice Handles that the amount is not bigger than cdp debt and not dust function limitLoanAmount(uint _cdpId, bytes32 _ilk, uint _paybackAmount, address _owner) internal returns (uint256) { uint debt = getAllDebt(address(vat), manager.urns(_cdpId), manager.urns(_cdpId), _ilk); if (_paybackAmount > debt) { ERC20(DAI_ADDRESS).transfer(_owner, (_paybackAmount - debt)); return debt; } uint debtLeft = debt - _paybackAmount; (,,,, uint dust) = vat.ilks(_ilk); dust = dust / 10**27; // Less than dust value if (debtLeft < dust) { uint amountOverDust = (dust - debtLeft); ERC20(DAI_ADDRESS).transfer(_owner, amountOverDust); return (_paybackAmount - amountOverDust); } return _paybackAmount; } receive() external override(FlashLoanReceiverBase, SaverExchangeCore) payable {} } contract CompoundFlashLoanTaker is CompoundSaverProxy, ProxyPermission, GasBurner { ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); address payable public constant COMPOUND_SAVER_FLASH_LOAN = 0x0ed294340b6328647A652207AA72902747C84c94; /// @notice Repays the position with it's own fund or with FL if needed /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress, exchangeAddress] /// @param _gasCost Gas cost for specific transaction function repayWithLoan( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost ) public payable burnGas(25) { uint maxColl = getMaxCollateral(_cAddresses[0], address(this)); if (_exData.srcAmount <= maxColl) { repay(_exData, _cAddresses, _gasCost); } else { // 0x fee COMPOUND_SAVER_FLASH_LOAN.transfer(msg.value); uint loanAmount = (_exData.srcAmount - maxColl); bytes memory encoded = packExchangeData(_exData); bytes memory paramsData = abi.encode(encoded, _cAddresses, _gasCost, true, address(this)); givePermission(COMPOUND_SAVER_FLASH_LOAN); lendingPool.flashLoan(COMPOUND_SAVER_FLASH_LOAN, getUnderlyingAddr(_cAddresses[0]), loanAmount, paramsData); removePermission(COMPOUND_SAVER_FLASH_LOAN); logger.Log(address(this), msg.sender, "CompoundFlashRepay", abi.encode(loanAmount, _exData.srcAmount, _cAddresses[0])); } } /// @notice Boosts the position with it's own fund or with FL if needed /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress, exchangeAddress] /// @param _gasCost Gas cost for specific transaction function boostWithLoan( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost ) public payable burnGas(20) { uint maxBorrow = getMaxBorrow(_cAddresses[1], address(this)); if (_exData.srcAmount <= maxBorrow) { boost(_exData, _cAddresses, _gasCost); } else { // 0x fee COMPOUND_SAVER_FLASH_LOAN.transfer(msg.value); uint loanAmount = (_exData.srcAmount - maxBorrow); bytes memory paramsData = abi.encode(packExchangeData(_exData), _cAddresses, _gasCost, false, address(this)); givePermission(COMPOUND_SAVER_FLASH_LOAN); lendingPool.flashLoan(COMPOUND_SAVER_FLASH_LOAN, getUnderlyingAddr(_cAddresses[1]), loanAmount, paramsData); removePermission(COMPOUND_SAVER_FLASH_LOAN); logger.Log(address(this), msg.sender, "CompoundFlashBoost", abi.encode(loanAmount, _exData.srcAmount, _cAddresses[1])); } } }

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{"success": true, "error": null, "results": {"detectors": [{"check": "tx-origin", "impact": "Medium", "confidence": "Medium"}, {"check": "name-reused", "impact": "High", "confidence": "High"}, {"check": "erc20-interface", "impact": "Medium", "confidence": "High"}, {"check": "arbitrary-send", "impact": "High", "confidence": "Medium"}, {"check": "unchecked-lowlevel", "impact": "Medium", "confidence": "Medium"}, {"check": "incorrect-equality", "impact": "Medium", "confidence": "High"}, {"check": "uninitialized-local", "impact": "Medium", "confidence": "Medium"}, {"check": "unchecked-transfer", "impact": "High", "confidence": "Medium"}, {"check": "unused-return", "impact": "Medium", "confidence": "Medium"}, {"check": "locked-ether", "impact": "Medium", "confidence": "High"}]}}

0x6e5B9B76D25F63e7B6957af1E112e95E465F2532

pragma solidity 0.6.12; abstract contract Context { function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor () internal { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), msgSender); } /** * @dev Returns the address of the current owner. */ function owner() public view returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(_owner == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { emit OwnershipTransferred(_owner, address(0)); _owner = address(0); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } } library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } library SafeERC20 { using SafeMath for uint256; using Address for address; function safeTransfer(IERC20 token, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value)); } /** * @dev Deprecated. This function has issues similar to the ones found in * {IERC20-approve}, and its usage is discouraged. * * Whenever possible, use {safeIncreaseAllowance} and * {safeDecreaseAllowance} instead. */ function safeApprove(IERC20 token, address spender, uint256 value) internal { // safeApprove should only be called when setting an initial allowance, // or when resetting it to zero. To increase and decrease it, use // 'safeIncreaseAllowance' and 'safeDecreaseAllowance' // solhint-disable-next-line max-line-length require((value == 0) || (token.allowance(address(this), spender) == 0), "SafeERC20: approve from non-zero to non-zero allowance" ); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value)); } function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).add(value); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero"); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). */ function _callOptionalReturn(IERC20 token, bytes memory data) private { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that // the target address contains contract code and also asserts for success in the low-level call. bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed"); if (returndata.length > 0) { // Return data is optional // solhint-disable-next-line max-line-length require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } } } library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // This method relies in extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. uint256 size; // solhint-disable-next-line no-inline-assembly assembly { size := extcodesize(account) } return size > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain`call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return _functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); return _functionCallWithValue(target, data, value, errorMessage); } function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) { require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: weiValue }(data); if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } interface IHegicStaking is IERC20 { function claimProfit() external returns (uint profit); function buy(uint amount) external; function sell(uint amount) external; function profitOf(address account) external view returns (uint profit); } interface IHegicStakingETH is IHegicStaking { function sendProfit() external payable; } interface IHegicStakingERC20 is IHegicStaking { function sendProfit(uint amount) external; } contract Migrations { address public owner = msg.sender; uint public last_completed_migration; modifier restricted() { require( msg.sender == owner, "This function is restricted to the contract's owner" ); _; } function setCompleted(uint completed) public restricted { last_completed_migration = completed; } } contract ERC20 is Context, IERC20 { using SafeMath for uint256; using Address for address; mapping (address => uint256) private _balances; mapping (address => mapping (address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; uint8 private _decimals; /** * @dev Sets the values for {name} and {symbol}, initializes {decimals} with * a default value of 18. * * To select a different value for {decimals}, use {_setupDecimals}. * * All three of these values are immutable: they can only be set once during * construction. */ constructor (string memory name, string memory symbol) public { _name = name; _symbol = symbol; _decimals = 18; } /** * @dev Returns the name of the token. */ function name() public view returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5,05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is * called. * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view returns (uint8) { return _decimals; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `recipient` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address recipient, uint256 amount) public virtual override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { _approve(_msgSender(), spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}; * * Requirements: * - `sender` and `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. * - the caller must have allowance for ``sender``'s tokens of at least * `amount`. */ function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) { _transfer(sender, recipient, amount); _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance")); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue)); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero")); return true; } /** * @dev Moves tokens `amount` from `sender` to `recipient`. * * This is internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `sender` cannot be the zero address. * - `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. */ function _transfer(address sender, address recipient, uint256 amount) internal virtual { require(sender != address(0), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(sender, recipient, amount); _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance"); _balances[recipient] = _balances[recipient].add(amount); emit Transfer(sender, recipient, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements * * - `to` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply = _totalSupply.add(amount); _balances[account] = _balances[account].add(amount); emit Transfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance"); _totalSupply = _totalSupply.sub(amount); emit Transfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens. * * This internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve(address owner, address spender, uint256 amount) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Sets {decimals} to a value other than the default one of 18. * * WARNING: This function should only be called from the constructor. Most * applications that interact with token contracts will not expect * {decimals} to ever change, and may work incorrectly if it does. */ function _setupDecimals(uint8 decimals_) internal { _decimals = decimals_; } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be to transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { } } abstract contract HegicPooledStaking is Ownable, ERC20{ using SafeMath for uint; using SafeERC20 for IERC20; // HEGIC token IERC20 public immutable HEGIC; // Hegic Protocol Staking Contract IHegicStaking public staking; // Parameters uint public LOCK_UP_PERIOD = 24 hours; uint public STAKING_LOT_PRICE = 888_000e18; uint public ACCURACY = 1e30; address payable public FALLBACK_RECIPIENT; address payable public FEE_RECIPIENT; uint public FEE; // Monitoring variables uint public numberOfStakingLots; uint public totalBalance; uint public lockedBalance; uint public totalProfitPerToken; bool public emergencyUnlockState; bool public depositsAllowed; // Staking lots mappings mapping(uint => mapping(address => uint)) stakingLotShares; mapping(uint => address[]) stakingLotOwners; mapping(uint => uint) stakingLotUnlockTime; mapping(uint => bool) stakingLotActive; mapping(uint => uint) startProfit; // Owners mappings mapping(address => uint[]) ownedStakingLots; mapping(address => uint) savedProfit; mapping(address => uint) lastProfit; mapping(address => uint) ownerPerformanceFee; // Events event Deposit(address account, uint amount); event Withdraw(address account, uint amount); event AddLiquidity(address account, uint amount, uint lotId); event BuyLot(address account, uint lotId); event SellLot(address account, uint lotId); event PayProfit(address account, uint profit, uint fee); constructor(IERC20 _token, IHegicStaking _staking, string memory name, string memory symbol) public ERC20(name, symbol){ HEGIC = _token; staking = _staking; totalBalance = 0; lockedBalance = 0; numberOfStakingLots = 0; totalProfitPerToken = 0; FALLBACK_RECIPIENT = msg.sender; FEE_RECIPIENT = msg.sender; FEE = 5; emergencyUnlockState = false; depositsAllowed = true; // Approving to Staking Lot Contract _token.approve(address(_staking), 888e30); } // Payable receive() external payable {} /** * @notice Lets the owner deactivate lockUp period. This means that if set to true, * staking lot owners will be able to exitFromStakingLot immediately. * Reserved for emergency cases only (e.g. migration of liquidity). * OWNER WILL NOT BE ABLE TO WITHDRAW FUNDS; ONLY UNLOCK FUNDS FOR YOU TO WITHDRAW THEM. * @param _unlock true or false, default = false. If set to true, owners will be able to withdraw HEGIC * immediately */ function emergencyUnlock(bool _unlock) external onlyOwner { emergencyUnlockState = _unlock; } /** * @notice Stops the ability to add new deposits * @param _allow If set to false, new deposits will be rejected */ function allowDeposits(bool _allow) external onlyOwner { depositsAllowed = _allow; } /** * @notice Changes Fee paid to creator (only paid when taking profits) * @param _fee New fee */ function changeFee(uint _fee) external onlyOwner { require(_fee >= 0, "Fee too low"); require(_fee <= 8, "Fee too high"); FEE = _fee; } /** * @notice Changes Fee Recipient address * @param _recipient New address */ function changeFeeRecipient(address _recipient) external onlyOwner { FEE_RECIPIENT = payable(_recipient); } /** * @notice Changes Fallback Recipient address. This is only used in case of unexpected behavior * @param _recipient New address */ function changeFallbackRecipient(address _recipient) external onlyOwner { FALLBACK_RECIPIENT = payable(_recipient); } /** * @notice Changes lock up period. This lock up period is used to lock funds in a staking for for at least some time * IMPORTANT: Changes only apply to new Staking Lots * @param _newLockUpPeriod New lock up period in seconds */ function changeLockUpPeriod(uint _newLockUpPeriod) external onlyOwner { require(_newLockUpPeriod <= 2 weeks, "Lock up period too long"); require(_newLockUpPeriod >= 24 hours, "Lock up period too short"); LOCK_UP_PERIOD = _newLockUpPeriod; } /** * @notice Main EXTERNAL function. Deposits HEGIC for the next staking lot. * If not enough, deposits will be stored until at least 888_000 HEGIC are available. * Then, the contract will buy a Hegic Staking Lot. * Once a Staking Lot is bought, users have to wait LOCK_UP_PERIOD (default = 2 weeks) to withdraw funds. * @param _HEGICAmount Amount of HEGIC to deposit in next staking lot */ function deposit(uint _HEGICAmount) external { require(_HEGICAmount > 0, "Amount too low"); require(_HEGICAmount < STAKING_LOT_PRICE, "Amount too high, buy your own lot"); require(depositsAllowed, "Deposits are not allowed at the moment"); // set fee for that staking lot owner - this effectively sets the maximum FEE an owner can have // each time user deposits, this checks if current fee is higher or lower than previous fees // and updates it if it is lower if(ownerPerformanceFee[msg.sender] > FEE || balanceOf(msg.sender) == 0) ownerPerformanceFee[msg.sender] = FEE; //receive deposit depositHegic(_HEGICAmount); // use new liquidity (either stores it for next purchase or purchases right away) useLiquidity(_HEGICAmount, msg.sender); emit Deposit(msg.sender, _HEGICAmount); } /** * @notice Internal function to transfer deposited HEGIC to the contract and mint sHEGIC (Staked HEGIC) * @param _HEGICAmount Amount of HEGIC to deposit // Amount of sHEGIC that will be minted */ function depositHegic(uint _HEGICAmount) internal { totalBalance = totalBalance.add(_HEGICAmount); _mint(msg.sender, _HEGICAmount); HEGIC.safeTransferFrom(msg.sender, address(this), _HEGICAmount); } /** * @notice Use certain amount of liquidity. Internal function in charge of buying a new lot if enough balance. * If there is not enough balance to buy a new lot, it will store the HEGIC * If available balance + _HEGICAmount is higher than STAKING_LOT_PRICE (888_000HEGIC), the remaining * amount will be stored for the next staking lot purchase. This remaining amount can be withdrawed with no lock up period * * @param _HEGICAmount Amount of HEGIC to be used * @param _account Account that owns _HEGICAmount to which any purchase will be credited to */ function useLiquidity(uint _HEGICAmount, address _account) internal { if(totalBalance.sub(lockedBalance) >= STAKING_LOT_PRICE){ uint pendingAmount = totalBalance.sub(lockedBalance).sub(STAKING_LOT_PRICE); addToNextLot(_HEGICAmount.sub(pendingAmount), _account); buyStakingLot(); if(pendingAmount > 0) addToNextLot(pendingAmount, _account); } else { addToNextLot(_HEGICAmount, _account); } } /** * @notice Internal function in charge of buying a new Staking Lot from the Hegic Staking Contract * Also, it will set up the Lock up AND increase the number of staking lots */ function buyStakingLot() internal { lockedBalance = lockedBalance.add(STAKING_LOT_PRICE); staking.buy(1); emit BuyLot(msg.sender, numberOfStakingLots); startProfit[numberOfStakingLots] = totalProfitPerToken; stakingLotUnlockTime[numberOfStakingLots] = now + LOCK_UP_PERIOD; stakingLotActive[numberOfStakingLots] = true; numberOfStakingLots = numberOfStakingLots + 1; } /** * @notice Internal function in charge of adding the _amount HEGIC to the next lot ledger. * User will be added as an owner of the lot and will be credited with _amount shares of that lot (total = 888_000 shares) * @param _amount Amount of HEGIC to be used * @param _account Account to which _amount will be credited to */ function addToNextLot(uint _amount, address _account) internal { if(stakingLotShares[numberOfStakingLots][_account] == 0) { ownedStakingLots[_account].push(numberOfStakingLots); // if first contribution in this lot: add to list stakingLotOwners[numberOfStakingLots].push(_account); } // add to shares in next Staking Lot stakingLotShares[numberOfStakingLots][_account] = stakingLotShares[numberOfStakingLots][_account].add(_amount); emit AddLiquidity(_account, _amount, numberOfStakingLots); } /** * @notice internal function that withdraws HEGIC deposited in exchange of sHEGIC * * @param _amount Amount of sHEGIC to be burned // Amount of HEGIC to be received */ function exchangeStakedForReal(uint _amount) internal { totalBalance = totalBalance.sub(_amount); _burn(msg.sender, _amount); HEGIC.safeTransfer(msg.sender, _amount); emit Withdraw(msg.sender, _amount); } /** * @notice Main EXTERNAL function. This function is called to exit from a certain Staking Lot * Calling this function will result in the withdrawal of allocated HEGIC for msg.sender * Owners that are not withdrawing funds will be credited with shares of the next lot to be purchased * * @param _slotId Amount of HEGIC to be used */ function exitFromStakingLot(uint _slotId) external { require(stakingLotShares[_slotId][msg.sender] > 0, "Not participating in this lot"); require(_slotId <= numberOfStakingLots, "Staking lot not found"); // if HEGIC not yet staked if(_slotId == numberOfStakingLots){ uint shares = stakingLotShares[_slotId][msg.sender]; stakingLotShares[_slotId][msg.sender] = 0; exchangeStakedForReal(shares); } else { require((stakingLotUnlockTime[_slotId] <= now) || emergencyUnlockState, "Staking Lot is still locked"); // it is important to withdraw unused funds first to avoid re-ordering attack require(stakingLotShares[numberOfStakingLots][msg.sender] == 0, "Please withdraw your non-staked liquidity first"); // sell lot staking.sell(1); emit SellLot(msg.sender, _slotId); stakingLotActive[_slotId] = false; address[] memory slOwners = stakingLotOwners[_slotId]; // I unlock and withdraw msg.sender funds to avoid using her funds in the for loop uint shares = stakingLotShares[_slotId][msg.sender]; stakingLotShares[_slotId][msg.sender] = 0; exchangeStakedForReal(shares); lockedBalance -= shares; address owner; for(uint i = 0; i < slOwners.length; i++) { owner = slOwners[i]; shares = stakingLotShares[_slotId][owner]; stakingLotShares[_slotId][owner] = 0; // put back to 0 the participation in this lot // put liquidity into next staking lot OR pay staked Hegic back if msg.sender if(owner != msg.sender) { lockedBalance -= shares; saveProfit(owner); useLiquidity(shares, owner); } } } } /** * @notice Virtual function. To be called to claim Profit from Hegic Staking Contracts. * It will update profit of current staking lot owners */ function updateProfit() public virtual; /** * @notice EXTERNAL function. Calling this function will result in receiving profits accumulated * during the time the HEGIC were deposited * */ function claimProfit() external { uint profit = saveProfit(msg.sender); savedProfit[msg.sender] = 0; _transferProfit(profit, msg.sender, ownerPerformanceFee[msg.sender]); emit PayProfit(msg.sender, profit, ownerPerformanceFee[msg.sender]); } /** * @notice Support function. Calculates how much of the totalProfitPerToken is not to be paid to an account * This may be because it was already paid, it was earned before HEGIC were staked, ... * * @param _account Amount of HEGIC to be used */ function getNotPayableProfit(address _account) public view returns (uint notPayableProfit) { if(ownedStakingLots[_account].length > 0){ uint lastStakingLot = ownedStakingLots[_account][ownedStakingLots[_account].length-1]; uint accountLastProfit = lastProfit[_account]; if(accountLastProfit <= startProfit[lastStakingLot]) { // previous lastProfit * number of shares excluding last contribution (Last Staking Lot) + start Profit of Last Staking Lot uint lastTakenProfit = accountLastProfit.mul(balanceOf(_account).sub(stakingLotShares[lastStakingLot][_account])); uint initialNotPayableProfit = startProfit[lastStakingLot].mul(stakingLotShares[lastStakingLot][_account]); notPayableProfit = lastTakenProfit.add(initialNotPayableProfit); } else { notPayableProfit = accountLastProfit.mul(balanceOf(_account).sub(getUnlockedTokens(_account))); } } } /** * @notice Support function. Calculates how many of the deposited tokens are not currently staked * These are not producing profits * * @param _account Amount of HEGIC to be used */ function getUnlockedTokens(address _account) public view returns (uint lockedTokens){ if(ownedStakingLots[_account].length > 0) { uint lastStakingLot = ownedStakingLots[_account][ownedStakingLots[_account].length-1]; if(lastStakingLot == numberOfStakingLots) lockedTokens = stakingLotShares[lastStakingLot][_account]; } } /** * @notice Support function. Calculates how many of the deposited tokens are not currently staked * These are not producing profits and will not be accounted for profit calcs. * * @param _account Account */ function getUnsaved(address _account) public view returns (uint profit) { uint accountBalance = balanceOf(_account); uint unlockedTokens = getUnlockedTokens(_account); uint tokens = accountBalance.sub(unlockedTokens); profit = 0; if(tokens > 0) profit = totalProfitPerToken.mul(tokens).sub(getNotPayableProfit(_account)).div(ACCURACY); } /** * @notice Support function. Calculates how much profit would receive each token if the contract claimed * profit accumulated in Hegic's Staking Lot contracts * * @param _account Account to do the calculation to */ function getUnreceivedProfit(address _account) public view returns (uint unreceived){ uint accountBalance = balanceOf(_account); uint unlockedTokens = getUnlockedTokens(_account); uint tokens = accountBalance.sub(unlockedTokens); uint profit = staking.profitOf(address(this)); if(lockedBalance > 0) unreceived = profit.mul(ACCURACY).div(lockedBalance).mul(tokens).div(ACCURACY); else unreceived = 0; } /** * @notice EXTERNAL View function. Returns profit to be paid when claimed for _account * * @param _account Account */ function profitOf(address _account) external view returns (uint profit) { uint unreceived = getUnreceivedProfit(_account); return savedProfit[_account].add(getUnsaved(_account)).add(unreceived); } /** * @notice Internal function that saves unpaid profit to keep accounting. * * @param _account Account to save profit to */ function saveProfit(address _account) internal returns (uint profit) { updateProfit(); uint unsaved = getUnsaved(_account); lastProfit[_account] = totalProfitPerToken; profit = savedProfit[_account].add(unsaved); savedProfit[_account] = profit; } /** * @notice Support function. Relevant to the profit system. It will save state of profit before each * token transfer (either deposit or withdrawal) * * @param from Account sending tokens * @param to Account receiving tokens */ function _beforeTokenTransfer(address from, address to, uint256) internal override { if (from != address(0)) saveProfit(from); if (to != address(0)) saveProfit(to); } /** * @notice Virtual Internal function. It handles specific code to actually send the profits. * * @param _amount Profit (amount being transferred) * @param _account Account receiving profits * @param _fee Fee that is being paid to FEE_RECIPIENT (always less than 8%) */ function _transferProfit(uint _amount, address _account, uint _fee) internal virtual; /** * @notice Public function returning the number of shares that an account holds per specific staking lot * * @param _slotId Staking Lot Id * @param _account Account */ function getStakingLotShares(uint _slotId, address _account) view public returns (uint) { return stakingLotShares[_slotId][_account]; } /** * @notice Returns boolean telling if lot is still in lock up period or not * * @param _slotId Staking Lot Id */ function isInLockUpPeriod(uint _slotId) view public returns (bool) { return !((stakingLotUnlockTime[_slotId] <= now) || emergencyUnlockState); } /** * @notice Returns boolean telling if lot is active or not * * @param _slotId Staking Lot Id */ function isActive(uint _slotId) view public returns (bool) { return stakingLotActive[_slotId]; } /** * @notice Returns list of staking lot owners * * @param _slotId Staking Lot Id */ function getLotOwners(uint _slotId) view public returns (address[] memory slOwners) { slOwners = stakingLotOwners[_slotId]; } /** * @notice Returns performance fee for this specific owner * * @param _account Account's address */ function getOwnerPerformanceFee(address _account) view public returns (uint performanceFee) { performanceFee = ownerPerformanceFee[_account]; } } contract HegicPooledStakingETH is HegicPooledStaking { constructor(IERC20 _token, IHegicStaking _staking) public HegicPooledStaking(_token, _staking, "ETH Staked HEGIC", "sHEGICETH") { } function _transferProfit(uint _amount, address _account, uint _fee) internal override{ uint netProfit = _amount.mul(uint(100).sub(_fee)).div(100); payable(_account).transfer(netProfit); FEE_RECIPIENT.transfer(_amount.sub(netProfit)); } function updateProfit() public override { uint profit = staking.profitOf(address(this)); if(profit > 0) profit = staking.claimProfit(); if(lockedBalance <= 0) FALLBACK_RECIPIENT.transfer(profit); else totalProfitPerToken = totalProfitPerToken.add(profit.mul(ACCURACY).div(lockedBalance)); } } contract HegicPooledStakingWBTC is HegicPooledStaking { IERC20 public immutable underlying; constructor(IERC20 _token, IHegicStaking _staking, IERC20 _underlying) public HegicPooledStaking(_token, _staking, "WBTC Staked HEGIC", "sHEGICWBTC") { underlying = _underlying; } /** * @notice Support internal function. Calling it will transfer _amount WBTC to _account. * If FEE > 0, a FEE% commission will be paid to FEE_RECIPIENT * @param _amount Amount to transfer * @param _account Account that will receive profit */ function _transferProfit(uint _amount, address _account, uint _fee) internal override { uint netProfit = _amount.mul(uint(100).sub(_fee)).div(100); underlying.safeTransfer(_account, netProfit); underlying.safeTransfer(FEE_RECIPIENT, _amount.sub(netProfit)); } /** * @notice claims profit from Hegic's Staking Contrats and splits it among all currently staked tokens */ function updateProfit() public override { uint profit = staking.profitOf(address(this)); if(profit > 0){ profit = staking.claimProfit(); if(lockedBalance <= 0) underlying.safeTransfer(FALLBACK_RECIPIENT, profit); else totalProfitPerToken = totalProfitPerToken.add(profit.mul(ACCURACY).div(lockedBalance)); } } } contract FakeHegicStakingETH is ERC20("Hegic ETH Staking Lot", "hlETH"), IHegicStakingETH { using SafeMath for uint; using SafeERC20 for IERC20; uint public LOT_PRICE = 888_000e18; IERC20 public token; uint public totalProfit; event Claim(address account, uint profit); constructor(IERC20 _token) public { totalProfit = 0; token = _token; _setupDecimals(0); } function sendProfit() external payable override { totalProfit = totalProfit.add(msg.value); } function claimProfit() external override returns (uint _profit) { _profit = totalProfit; require(_profit > 0, "Zero profit"); emit Claim(msg.sender, _profit); _transferProfit(_profit); totalProfit = totalProfit.sub(_profit); } function _transferProfit(uint _profit) internal { msg.sender.transfer(_profit); } function buy(uint _amount) external override { require(_amount > 0, "Amount is zero"); _mint(msg.sender, _amount); token.safeTransferFrom(msg.sender, address(this), _amount.mul(LOT_PRICE)); } function sell(uint _amount) external override { _burn(msg.sender, _amount); token.safeTransfer(msg.sender, _amount.mul(LOT_PRICE)); } function profitOf(address) public view override returns (uint _totalProfit) { _totalProfit = totalProfit; } } contract FakeHegicStakingWBTC is ERC20("Hegic WBTC Staking Lot", "hlWBTC"), IHegicStakingERC20 { using SafeMath for uint; using SafeERC20 for IERC20; uint public totalProfit; IERC20 public immutable WBTC; IERC20 public token; uint public LOT_PRICE = 888_000e18; event Claim(address account, uint profit); constructor(IERC20 _wbtc, IERC20 _token) public { WBTC = _wbtc; token = _token; totalProfit = 0; _setupDecimals(0); } function sendProfit(uint _amount) external override { WBTC.safeTransferFrom(msg.sender, address(this), _amount); totalProfit = totalProfit.add(_amount); } function claimProfit() external override returns (uint _profit) { _profit = totalProfit; require(_profit > 0, "Zero profit"); emit Claim(msg.sender, _profit); _transferProfit(_profit); totalProfit = totalProfit.sub(_profit); } function _transferProfit(uint _profit) internal { WBTC.safeTransfer(msg.sender, _profit); } function buy(uint _amount) external override { require(_amount > 0, "Amount is zero"); _mint(msg.sender, _amount); token.safeTransferFrom(msg.sender, address(this), _amount.mul(LOT_PRICE)); } function sell(uint _amount) external override { _burn(msg.sender, _amount); token.safeTransfer(msg.sender, _amount.mul(LOT_PRICE)); } function profitOf(address) public view override returns (uint _totalProfit) { _totalProfit = totalProfit; } } contract FakeWBTC is ERC20("FakeWBTC", "FAKE") { constructor() public { _setupDecimals(8); } function mintTo(address account, uint256 amount) public { _mint(account, amount); } function mint(uint256 amount) public { _mint(msg.sender, amount); } } contract FakeHEGIC is ERC20("FakeHEGIC", "FAKEH") { using SafeERC20 for ERC20; function mintTo(address account, uint256 amount) public { _mint(account, amount); } function mint(uint256 amount) public { _mint(msg.sender, amount); } }

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{"success": true, "error": null, "results": {"detectors": [{"check": "divide-before-multiply", "impact": "Medium", "confidence": "Medium"}, {"check": "reentrancy-no-eth", "impact": "Medium", "confidence": "Medium"}, {"check": "tautology", "impact": "Medium", "confidence": "High"}, {"check": "arbitrary-send", "impact": "High", "confidence": "Medium"}, {"check": "reentrancy-eth", "impact": "High", "confidence": "Medium"}, {"check": "unused-return", "impact": "Medium", "confidence": "Medium"}]}}

0x6Ee6b3524353739191Ec12d573bD6c429A23632d

pragma solidity 0.6.5; interface LandToken { function mintQuad( address to, uint256 size, uint256 x, uint256 y, bytes calldata data ) external; } contract Admin { address internal _admin; /// @dev emitted when the contract administrator is changed. /// @param oldAdmin address of the previous administrator. /// @param newAdmin address of the new administrator. event AdminChanged(address oldAdmin, address newAdmin); /// @dev gives the current administrator of this contract. /// @return the current administrator of this contract. function getAdmin() external view returns (address) { return _admin; } /// @dev change the administrator to be `newAdmin`. /// @param newAdmin address of the new administrator. function changeAdmin(address newAdmin) external { require(msg.sender == _admin, "only admin can change admin"); emit AdminChanged(_admin, newAdmin); _admin = newAdmin; } modifier onlyAdmin() { require(msg.sender == _admin, "only admin allowed"); _; } } contract MetaTransactionReceiver is Admin { mapping(address => bool) internal _metaTransactionContracts; /// @dev emiited when a meta transaction processor is enabled/disabled /// @param metaTransactionProcessor address that will be given/removed metaTransactionProcessor rights. /// @param enabled set whether the metaTransactionProcessor is enabled or disabled. event MetaTransactionProcessor(address metaTransactionProcessor, bool enabled); /// @dev Enable or disable the ability of `metaTransactionProcessor` to perform meta-tx (metaTransactionProcessor rights). /// @param metaTransactionProcessor address that will be given/removed metaTransactionProcessor rights. /// @param enabled set whether the metaTransactionProcessor is enabled or disabled. function setMetaTransactionProcessor(address metaTransactionProcessor, bool enabled) public { require(msg.sender == _admin, "only admin can setup metaTransactionProcessors"); _setMetaTransactionProcessor(metaTransactionProcessor, enabled); } function _setMetaTransactionProcessor(address metaTransactionProcessor, bool enabled) internal { _metaTransactionContracts[metaTransactionProcessor] = enabled; emit MetaTransactionProcessor(metaTransactionProcessor, enabled); } /// @dev check whether address `who` is given meta-transaction execution rights. /// @param who The address to query. /// @return whether the address has meta-transaction execution rights. function isMetaTransactionProcessor(address who) external view returns (bool) { return _metaTransactionContracts[who]; } } interface ERC1155 { event TransferSingle(address indexed operator, address indexed from, address indexed to, uint256 id, uint256 value); event TransferBatch(address indexed operator, address indexed from, address indexed to, uint256[] ids, uint256[] values); event ApprovalForAll(address indexed owner, address indexed operator, bool approved); event URI(string value, uint256 indexed id); /** @notice Transfers `value` amount of an `id` from `from` to `to` (with safety call). @dev Caller must be approved to manage the tokens being transferred out of the `from` account (see "Approval" section of the standard). MUST revert if `to` is the zero address. MUST revert if balance of holder for token `id` is lower than the `value` sent. MUST revert on any other error. MUST emit the `TransferSingle` event to reflect the balance change (see "Safe Transfer Rules" section of the standard). After the above conditions are met, this function MUST check if `to` is a smart contract (e.g. code size > 0). If so, it MUST call `onERC1155Received` on `to` and act appropriately (see "Safe Transfer Rules" section of the standard). @param from Source address @param to Target address @param id ID of the token type @param value Transfer amount @param data Additional data with no specified format, MUST be sent unaltered in call to `onERC1155Received` on `to` */ function safeTransferFrom( address from, address to, uint256 id, uint256 value, bytes calldata data ) external; /** @notice Transfers `values` amount(s) of `ids` from the `from` address to the `to` address specified (with safety call). @dev Caller must be approved to manage the tokens being transferred out of the `from` account (see "Approval" section of the standard). MUST revert if `to` is the zero address. MUST revert if length of `ids` is not the same as length of `values`. MUST revert if any of the balance(s) of the holder(s) for token(s) in `ids` is lower than the respective amount(s) in `values` sent to the recipient. MUST revert on any other error. MUST emit `TransferSingle` or `TransferBatch` event(s) such that all the balance changes are reflected (see "Safe Transfer Rules" section of the standard). Balance changes and events MUST follow the ordering of the arrays (_ids[0]/_values[0] before _ids[1]/_values[1], etc). After the above conditions for the transfer(s) in the batch are met, this function MUST check if `to` is a smart contract (e.g. code size > 0). If so, it MUST call the relevant `ERC1155TokenReceiver` hook(s) on `to` and act appropriately (see "Safe Transfer Rules" section of the standard). @param from Source address @param to Target address @param ids IDs of each token type (order and length must match _values array) @param values Transfer amounts per token type (order and length must match _ids array) @param data Additional data with no specified format, MUST be sent unaltered in call to the `ERC1155TokenReceiver` hook(s) on `to` */ function safeBatchTransferFrom( address from, address to, uint256[] calldata ids, uint256[] calldata values, bytes calldata data ) external; /** @notice Get the balance of an account's tokens. @param owner The address of the token holder @param id ID of the token @return The _owner's balance of the token type requested */ function balanceOf(address owner, uint256 id) external view returns (uint256); /** @notice Get the balance of multiple account/token pairs @param owners The addresses of the token holders @param ids ID of the tokens @return The _owner's balance of the token types requested (i.e. balance for each (owner, id) pair) */ function balanceOfBatch(address[] calldata owners, uint256[] calldata ids) external view returns (uint256[] memory); /** @notice Enable or disable approval for a third party ("operator") to manage all of the caller's tokens. @dev MUST emit the ApprovalForAll event on success. @param operator Address to add to the set of authorized operators @param approved True if the operator is approved, false to revoke approval */ function setApprovalForAll(address operator, bool approved) external; /** @notice Queries the approval status of an operator for a given owner. @param owner The owner of the tokens @param operator Address of authorized operator @return True if the operator is approved, false if not */ function isApprovedForAll(address owner, address operator) external view returns (bool); } interface ERC20 { /// @notice emitted when tokens are transfered from one address to another. /// @param from address from which the token are transfered from (zero means tokens are minted). /// @param to destination address which the token are transfered to (zero means tokens are burnt). /// @param value amount of tokens transferred. event Transfer(address indexed from, address indexed to, uint256 value); /// @notice emitted when owner grant transfer rights to another address /// @param owner address allowing its token to be transferred. /// @param spender address allowed to spend on behalf of `owner` /// @param value amount of tokens allowed. event Approval(address indexed owner, address indexed spender, uint256 value); /// @notice return the current total amount of tokens owned by all holders. /// @return supply total number of tokens held. function totalSupply() external view returns (uint256 supply); /// @notice return the number of tokens held by a particular address. /// @param who address being queried. /// @return balance number of token held by that address. function balanceOf(address who) external view returns (uint256 balance); /// @notice transfer tokens to a specific address. /// @param to destination address receiving the tokens. /// @param value number of tokens to transfer. /// @return success whether the transfer succeeded. function transfer(address to, uint256 value) external returns (bool success); /// @notice transfer tokens from one address to another. /// @param from address tokens will be sent from. /// @param to destination address receiving the tokens. /// @param value number of tokens to transfer. /// @return success whether the transfer succeeded. function transferFrom( address from, address to, uint256 value ) external returns (bool success); /// @notice approve an address to spend on your behalf. /// @param spender address entitled to transfer on your behalf. /// @param value amount allowed to be transfered. /// @param success whether the approval succeeded. function approve(address spender, uint256 value) external returns (bool success); /// @notice return the current allowance for a particular owner/spender pair. /// @param owner address allowing spender. /// @param spender address allowed to spend. /// @return amount number of tokens `spender` can spend on behalf of `owner`. function allowance(address owner, address spender) external view returns (uint256 amount); } library SafeMathWithRequire { /** * @dev Multiplies two numbers, throws on overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256 c) { // Gas optimization: this is cheaper than asserting 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522 if (a == 0) { return 0; } c = a * b; require(c / a == b, "overflow"); return c; } /** * @dev Integer division of two numbers, truncating the quotient. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { require(b != 0, "divbyzero"); // uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return a / b; } /** * @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend). */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { require(b <= a, "undeflow"); return a - b; } /** * @dev Adds two numbers, throws on overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256 c) { c = a + b; require(c >= a, "overflow"); return c; } } library SigUtil { function recover(bytes32 hash, bytes memory sig) internal pure returns (address recovered) { require(sig.length == 65); bytes32 r; bytes32 s; uint8 v; assembly { r := mload(add(sig, 32)) s := mload(add(sig, 64)) v := byte(0, mload(add(sig, 96))) } // Version of signature should be 27 or 28, but 0 and 1 are also possible versions if (v < 27) { v += 27; } require(v == 27 || v == 28); recovered = ecrecover(hash, v, r, s); require(recovered != address(0)); } function recoverWithZeroOnFailure(bytes32 hash, bytes memory sig) internal pure returns (address) { if (sig.length != 65) { return (address(0)); } bytes32 r; bytes32 s; uint8 v; assembly { r := mload(add(sig, 32)) s := mload(add(sig, 64)) v := byte(0, mload(add(sig, 96))) } // Version of signature should be 27 or 28, but 0 and 1 are also possible versions if (v < 27) { v += 27; } if (v != 27 && v != 28) { return (address(0)); } else { return ecrecover(hash, v, r, s); } } // Builds a prefixed hash to mimic the behavior of eth_sign. function prefixed(bytes32 hash) internal pure returns (bytes memory) { return abi.encodePacked("\x19Ethereum Signed Message:\n32", hash); } } contract ReferralValidator is Admin { address private _signingWallet; uint256 private _maxCommissionRate; mapping(address => uint256) private _previousSigningWallets; uint256 private _previousSigningDelay = 60 * 60 * 24 * 10; event ReferralUsed( address indexed referrer, address indexed referee, address indexed token, uint256 amount, uint256 commission, uint256 commissionRate ); constructor(address initialSigningWallet, uint256 initialMaxCommissionRate) public { _signingWallet = initialSigningWallet; _maxCommissionRate = initialMaxCommissionRate; } /** * @dev Update the signing wallet * @param newSigningWallet The new address of the signing wallet */ function updateSigningWallet(address newSigningWallet) external { require(_admin == msg.sender, "Sender not admin"); _previousSigningWallets[_signingWallet] = now + _previousSigningDelay; _signingWallet = newSigningWallet; } /** * @dev signing wallet authorized for referral * @return the address of the signing wallet */ function getSigningWallet() external view returns (address) { return _signingWallet; } /** * @notice the max commision rate * @return the maximum commision rate that a referral can give */ function getMaxCommisionRate() external view returns (uint256) { return _maxCommissionRate; } /** * @dev Update the maximum commission rate * @param newMaxCommissionRate The new maximum commission rate */ function updateMaxCommissionRate(uint256 newMaxCommissionRate) external { require(_admin == msg.sender, "Sender not admin"); _maxCommissionRate = newMaxCommissionRate; } function handleReferralWithETH( uint256 amount, bytes memory referral, address payable destination ) internal { uint256 amountForDestination = amount; if (referral.length > 0) { (bytes memory signature, address referrer, address referee, uint256 expiryTime, uint256 commissionRate) = decodeReferral(referral); uint256 commission = 0; if (isReferralValid(signature, referrer, referee, expiryTime, commissionRate)) { commission = SafeMathWithRequire.div(SafeMathWithRequire.mul(amount, commissionRate), 10000); emit ReferralUsed(referrer, referee, address(0), amount, commission, commissionRate); amountForDestination = SafeMathWithRequire.sub(amountForDestination, commission); } if (commission > 0) { address(uint160(referrer)).transfer(commission); } } destination.transfer(amountForDestination); } function handleReferralWithERC20( address buyer, uint256 amount, bytes memory referral, address payable destination, address tokenAddress ) internal { ERC20 token = ERC20(tokenAddress); uint256 amountForDestination = amount; if (referral.length > 0) { (bytes memory signature, address referrer, address referee, uint256 expiryTime, uint256 commissionRate) = decodeReferral(referral); uint256 commission = 0; if (isReferralValid(signature, referrer, referee, expiryTime, commissionRate)) { commission = SafeMathWithRequire.div(SafeMathWithRequire.mul(amount, commissionRate), 10000); emit ReferralUsed(referrer, referee, tokenAddress, amount, commission, commissionRate); amountForDestination = SafeMathWithRequire.sub(amountForDestination, commission); } if (commission > 0) { require(token.transferFrom(buyer, referrer, commission), "commision transfer failed"); } } require(token.transferFrom(buyer, destination, amountForDestination), "payment transfer failed"); } /** * @notice Check if a referral is valid * @param signature The signature to check (signed referral) * @param referrer The address of the referrer * @param referee The address of the referee * @param expiryTime The expiry time of the referral * @param commissionRate The commissionRate of the referral * @return True if the referral is valid */ function isReferralValid( bytes memory signature, address referrer, address referee, uint256 expiryTime, uint256 commissionRate ) public view returns (bool) { if (commissionRate > _maxCommissionRate || referrer == referee || now > expiryTime) { return false; } bytes32 hashedData = keccak256(abi.encodePacked(referrer, referee, expiryTime, commissionRate)); address signer = SigUtil.recover(keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hashedData)), signature); if (_previousSigningWallets[signer] >= now) { return true; } return _signingWallet == signer; } function decodeReferral(bytes memory referral) public pure returns ( bytes memory, address, address, uint256, uint256 ) { (bytes memory signature, address referrer, address referee, uint256 expiryTime, uint256 commissionRate) = abi.decode( referral, (bytes, address, address, uint256, uint256) ); return (signature, referrer, referee, expiryTime, commissionRate); } } contract EstateSaleWithFee is MetaTransactionReceiver, ReferralValidator { using SafeMathWithRequire for uint256; event LandQuadPurchased( address indexed buyer, address indexed to, uint256 indexed topCornerId, uint256 size, uint256 price, address token, uint256 amountPaid ); /// @notice set the wallet receiving the proceeds /// @param newWallet address of the new receiving wallet function setReceivingWallet(address payable newWallet) external { require(newWallet != address(0), "ZERO_ADDRESS"); require(msg.sender == _admin, "NOT_AUTHORIZED"); _wallet = newWallet; } function rebalanceSand(uint256 newMultiplier) external { require(msg.sender == _admin, "NOT_AUTHORIZED"); _multiplier = newMultiplier; } function getSandMultiplier() external view returns (uint256) { return _multiplier; } /// @notice buy Land with SAND using the merkle proof associated with it /// @param buyer address that perform the payment /// @param to address that will own the purchased Land /// @param reserved the reserved address (if any) /// @param x x coordinate of the Land /// @param y y coordinate of the Land /// @param size size of the pack of Land to purchase /// @param priceInSand price in SAND to purchase that Land /// @param proof merkleProof for that particular Land function buyLandWithSand( address buyer, address to, address reserved, uint256 x, uint256 y, uint256 size, uint256 priceInSand, uint256 adjustedPriceInSand, bytes32 salt, uint256[] calldata assetIds, bytes32[] calldata proof, bytes calldata referral ) external { _checkPrices(priceInSand, adjustedPriceInSand); _checkValidity(buyer, reserved, x, y, size, priceInSand, salt, assetIds, proof); _handleFeeAndReferral(buyer, adjustedPriceInSand, referral); _mint(buyer, to, x, y, size, adjustedPriceInSand, address(_sand), adjustedPriceInSand); _sendAssets(to, assetIds); } /// @notice Gets the expiry time for the current sale /// @return The expiry time, as a unix epoch function getExpiryTime() external view returns (uint256) { return _expiryTime; } /// @notice Gets the Merkle root associated with the current sale /// @return The Merkle root, as a bytes32 hash function getMerkleRoot() external view returns (bytes32) { return _merkleRoot; } /// @notice enable Admin to withdraw remaining assets from EstateSaleWithFee contract /// @param to intended recipient of the asset tokens /// @param assetIds the assetIds to be transferred /// @param values the quantities of the assetIds to be transferred function withdrawAssets( address to, uint256[] calldata assetIds, uint256[] calldata values ) external { require(msg.sender == _admin, "NOT_AUTHORIZED"); require(block.timestamp > _expiryTime, "SALE_NOT_OVER"); _asset.safeBatchTransferFrom(address(this), to, assetIds, values, ""); } function onERC1155Received( address, /*operator*/ address, /*from*/ uint256, /*id*/ uint256, /*value*/ bytes calldata /*data*/ ) external pure returns (bytes4) { return 0xf23a6e61; } function onERC1155BatchReceived( address, /*operator*/ address, /*from*/ uint256[] calldata, /*ids*/ uint256[] calldata, /*values*/ bytes calldata /*data*/ ) external pure returns (bytes4) { return 0xbc197c81; } function _sendAssets(address to, uint256[] memory assetIds) internal { uint256[] memory values = new uint256[](assetIds.length); for (uint256 i = 0; i < assetIds.length; i++) { values[i] = 1; } _asset.safeBatchTransferFrom(address(this), to, assetIds, values, ""); } function _checkPrices(uint256 priceInSand, uint256 adjustedPriceInSand) internal view { require(adjustedPriceInSand == priceInSand.mul(_multiplier).div(MULTIPLIER_DECIMALS), "INVALID_PRICE"); } function _checkValidity( address buyer, address reserved, uint256 x, uint256 y, uint256 size, uint256 price, bytes32 salt, uint256[] memory assetIds, bytes32[] memory proof ) internal view { /* solium-disable-next-line security/no-block-members */ require(block.timestamp < _expiryTime, "SALE_IS_OVER"); require(buyer == msg.sender || _metaTransactionContracts[msg.sender], "NOT_AUTHORIZED"); require(reserved == address(0) || reserved == buyer, "RESERVED_LAND"); bytes32 leaf = _generateLandHash(x, y, size, price, reserved, salt, assetIds); require(_verify(proof, leaf), "INVALID_LAND"); } function _mint( address buyer, address to, uint256 x, uint256 y, uint256 size, uint256 price, address token, uint256 tokenAmount ) internal { if (size == 1 || _estate == address(0)) { _land.mintQuad(to, size, x, y, ""); } else { _land.mintQuad(_estate, size, x, y, abi.encode(to)); } emit LandQuadPurchased(buyer, to, x + (y * GRID_SIZE), size, price, token, tokenAmount); } function _generateLandHash( uint256 x, uint256 y, uint256 size, uint256 price, address reserved, bytes32 salt, uint256[] memory assetIds ) internal pure returns (bytes32) { return keccak256(abi.encodePacked(x, y, size, price, reserved, salt, assetIds)); } function _verify(bytes32[] memory proof, bytes32 leaf) internal view returns (bool) { bytes32 computedHash = leaf; for (uint256 i = 0; i < proof.length; i++) { bytes32 proofElement = proof[i]; if (computedHash < proofElement) { computedHash = keccak256(abi.encodePacked(computedHash, proofElement)); } else { computedHash = keccak256(abi.encodePacked(proofElement, computedHash)); } } return computedHash == _merkleRoot; } function _handleFeeAndReferral( address buyer, uint256 priceInSand, bytes memory referral ) internal { // send 5% fee to a specially configured instance of FeeDistributor.sol uint256 remainingAmountInSand = _handleSandFee(buyer, priceInSand); // calculate referral based on 95% of original priceInSand handleReferralWithERC20(buyer, remainingAmountInSand, referral, _wallet, address(_sand)); } function _handleSandFee(address buyer, uint256 priceInSand) internal returns (uint256) { uint256 feeAmountInSand = priceInSand.mul(FEE).div(100); require(_sand.transferFrom(buyer, address(_feeDistributor), feeAmountInSand), "FEE_TRANSFER_FAILED"); return priceInSand.sub(feeAmountInSand); } uint256 internal constant GRID_SIZE = 408; // 408 is the size of the Land ERC1155 internal immutable _asset; LandToken internal immutable _land; ERC20 internal immutable _sand; address internal immutable _estate; address internal immutable _feeDistributor; address payable internal _wallet; uint256 internal immutable _expiryTime; bytes32 internal immutable _merkleRoot; uint256 private constant FEE = 5; // percentage of land sale price to be diverted to a specially configured instance of FeeDistributor, shown as an integer uint256 private _multiplier = 1000; // multiplier used for rebalancing SAND values, 3 decimal places uint256 private constant MULTIPLIER_DECIMALS = 1000; constructor( address landAddress, address sandContractAddress, address initialMetaTx, address admin, address payable initialWalletAddress, bytes32 merkleRoot, uint256 expiryTime, address initialSigningWallet, uint256 initialMaxCommissionRate, address estate, address asset, address feeDistributor ) public ReferralValidator(initialSigningWallet, initialMaxCommissionRate) { _land = LandToken(landAddress); _sand = ERC20(sandContractAddress); _setMetaTransactionProcessor(initialMetaTx, true); _wallet = initialWalletAddress; _merkleRoot = merkleRoot; _expiryTime = expiryTime; _admin = admin; _estate = estate; _asset = ERC1155(asset); _feeDistributor = feeDistributor; } }

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{"success": true, "error": null, "results": {"detectors": [{"check": "arbitrary-send", "impact": "High", "confidence": "Medium"}]}}

0x6f08aafc2ad20cd7b6533e48983fd764dce53426

pragma solidity 0.5.0; interface IERC20 { function totalSupply() external view returns (uint256); function balanceOf(address who) external view returns (uint256); function transfer(address to, uint256 value) external returns (bool); function allowance(address owner, address spender) external view returns (uint256); function approve(address spender, uint256 value) external returns (bool); function transferFrom(address from, address to, uint256 value) external returns (bool); event Transfer(address indexed from, address indexed to, uint256 value); event Approval(address indexed owner, address indexed spender, uint256 value); } library SafeMath { /** * @dev Multiplies two numbers, reverts on overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522 if (a == 0) { return 0; } uint256 c = a * b; assert(c / a == b); return c; } /** * @dev Integer division of two numbers truncating the quotient, reverts on division by zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a / b; return c; } /** * @dev Subtracts two numbers, reverts on overflow (i.e. if subtrahend is greater than minuend). */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { assert(b <= a); return a - b; } /** * @dev Adds two numbers, reverts on overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; assert(c >= a); return c; } /** * @dev Divides two numbers and returns the remainder (unsigned integer modulo), * reverts when dividing by zero. */ function ceil(uint256 a, uint256 m) internal pure returns (uint256) { uint256 c = add(a,m); uint256 d = sub(c,1); return mul(div(d,m),m); } } contract ERC20Detailed is IERC20 { string private _name; string private _symbol; uint8 private _decimals; constructor(string memory name, string memory symbol, uint8 decimals) public { _name = name; _symbol = symbol; _decimals = decimals; } /** * @return the name of the token. */ function name() public view returns(string memory) { return _name; } /** * @return the symbol of the token. */ function symbol() public view returns(string memory) { return _symbol; } /** * @return the number of decimals of the token. */ function decimals() public view returns(uint8) { return _decimals; } } contract HellCasino is ERC20Detailed { using SafeMath for uint256; mapping (address => uint256) private _balances; mapping (address => uint256) private _adminBalances; mapping (address => mapping (address => uint256)) private _allowed; string constant tokenName = "HellCasino"; string constant tokenSymbol = "HCAS"; uint8 constant tokenDecimals = 8; uint256 _totalSupply = 30000000000000000; // 300 million total supply uint256 _OwnerSupply = 30000000000000000; // All supply is going to the contractOwner uint256 public jackpotfeePercent = 200; //2% going to jackpot address uint256 public burnPercent = 100; // 1% deflation each Tx //2 months in seconds 5259492 uint256 private _releaseTime = 5259492; uint256 private _released; address public contractOwner; address public jackpot; constructor() public payable ERC20Detailed(tokenName, tokenSymbol, tokenDecimals) { _released = block.timestamp+_releaseTime; contractOwner = msg.sender; _mint(msg.sender, _OwnerSupply); } modifier isOwner(){ require(msg.sender == contractOwner, "Unauthorised Sender"); _; } /** * @dev Total number of tokens in existence */ function totalSupply() public view returns (uint256) { return _totalSupply; } /** * @dev Returns when the Admin Funds will be released in seconds */ function released() public view returns (uint256) { return _released; } /** * @dev Gets the Admin balance of the specified address. * @param adminAddress The address to query the balance of. * @return An uint256 representing the amount owned by the passed address. */ function adminBalance(address adminAddress) public view returns(uint256) { return _adminBalances[adminAddress]; } /** * @dev Gets the balance of the specified address. * @param user The address to query the balance of. * @return An uint256 representing the amount owned by the passed address. */ function balanceOf(address user) public view returns (uint256) { return _balances[user]; } //Finding the percent of the burnfee function findBurnPercent(uint256 value) internal view returns (uint256) { //Burn 1% of the sellers tokens uint256 burnValue = value.ceil(1); uint256 onePercent = burnValue.mul(burnPercent).div(10000); return onePercent; } //Finding the percent of the jackpotfee function findJackpotPercent(uint256 value) internal view returns (uint256) { //Jackpot 2% of the sellers tokens uint256 jackpotValue = value.ceil(1); uint256 twoPercent = jackpotValue.mul(jackpotfeePercent).div(10000); return twoPercent; } function setJackpot(address _jackpot) public isOwner { jackpot = _jackpot; } //Simple transfer Does not burn tokens when transfering only allowed by Owner function simpleTransfer(address to, uint256 value) public isOwner returns (bool) { require(value <= _balances[msg.sender]); require(to != address(0)); _balances[msg.sender] = _balances[msg.sender].sub(value); _balances[to] = _balances[to].add(value); emit Transfer(msg.sender, to, value); return true; } //Send Locked token to contract only Owner Can do so its pointless for anyone else function sendLockedToken(address beneficiary, uint256 value) public isOwner{ require(_released > block.timestamp, "TokenTimelock: release time is before current time"); require(value <= _balances[msg.sender]); _balances[msg.sender] = _balances[msg.sender].sub(value); _adminBalances[beneficiary] = value; } //Anyone Can Release The Funds after 2 months function release() public returns(bool){ require(block.timestamp >= _released, "TokenTimelock: current time is before release time"); uint256 value = _adminBalances[msg.sender]; require(value > 0, "TokenTimelock: no tokens to release"); _balances[msg.sender] = _balances[msg.sender].add(value); emit Transfer(contractOwner , msg.sender, value); return true; } /** * @dev Transfer token for a specified address * @param to The address to transfer to. * @param value The amount to be transferred. */ //To be Used by users to trasnfer tokens and burn while doing so function transfer(address to, uint256 value) public returns (bool) { require(value <= _balances[msg.sender],"Not Enough Tokens in Account"); require(to != address(0)); require(value >= 2, "Minimum tokens to be sent is 2"); uint256 burn; uint256 jackpotfee; uint256 totalfee; if(value < 10){ burn = 1; }else{ burn = findBurnPercent(value); jackpotfee = findJackpotPercent(value); totalfee = burn + jackpotfee; } uint256 tokensToTransfer = value.sub(totalfee); _balances[msg.sender] = _balances[msg.sender].sub(value); _balances[to] = _balances[to].add(tokensToTransfer); _balances[jackpot] = _balances[jackpot].add(jackpotfee); _totalSupply = _totalSupply.sub(burn); emit Transfer(msg.sender, to, tokensToTransfer); emit Transfer(msg.sender, address(0), burn); emit Transfer(msg.sender, address(jackpot), jackpotfee); return true; } //Transfer tokens to multiple addresses at once function multiTransfer(address[] memory receivers, uint256[] memory amounts) public { for (uint256 i = 0; i < receivers.length; i++) { transfer(receivers[i], amounts[i]); } } /** * @dev Internal function that mints an amount of the token and assigns it to * an account. This encapsulates the modification of balances such that the * proper events are emitted. * @param account The account that will receive the created tokens. * @param amount The amount that will be created. */ function _mint(address account, uint256 amount) internal { require(amount != 0); _balances[account] = _balances[account].add(amount); emit Transfer(address(0), account, amount); } function burn(uint256 amount) external { require(amount <= _balances[msg.sender],"Not Enough Tokens in Account"); _burn(msg.sender, amount); } /** * @dev Internal function that burns an amount of the token of a given * account. * @param account The account whose tokens will be Deflationary. * @param amount The amount that will be Deflationary. */ function _burn(address account, uint256 amount) internal { require(amount != 0); require(amount <= _balances[account]); _totalSupply = _totalSupply.sub(amount); _balances[account] = _balances[account].sub(amount); emit Transfer(account, address(0), amount); } /** * @dev Internal function that burns an amount of the token of a given * account, deducting from the sender's allowance for said account. Uses the * internal burn function. * @param account The account whose tokens will be Deflationary. * @param amount The amount that will be Deflationary. */ function burnFrom(address account, uint256 amount) external { require(amount <= _allowed[account][msg.sender]); _allowed[account][msg.sender] = _allowed[account][msg.sender].sub(amount); _burn(account, amount); } /** * @dev Function to check the amount of tokens that an owner allowed to a spender. * @param owner address The address which owns the funds. * @param spender address The address which will spend the funds. * @return A uint256 specifying the amount of tokens still available for the spender. */ function allowance(address owner, address spender) public view returns (uint256) { return _allowed[owner][spender]; } /** * @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender. * Beware that changing an allowance with this method brings the risk that someone may use both the old * and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this * race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * @param spender The address which will spend the funds. * @param value The amount of tokens to be spent. */ function approve(address spender, uint256 value) public returns (bool) { require(spender != address(0)); _allowed[msg.sender][spender] = value; emit Approval(msg.sender, spender, value); return true; } /** * @dev Transfer tokens from one address to another * @param from address The address which you want to send tokens from * @param to address The address which you want to transfer to * @param value uint256 the amount of tokens to be transferred */ function transferFrom(address from, address to, uint256 value) public returns (bool) { require(value <= _balances[from]); require(value <= _allowed[from][msg.sender]); require(to != address(0)); //Delete balance of this account _balances[from] = _balances[from].sub(value); uint256 burn; uint256 jackpotfee; uint256 totalfee; if(value < 10){ burn = 1; }else{ burn = findBurnPercent(value); jackpotfee = findJackpotPercent(value); totalfee = burn + jackpotfee; } uint256 tokensToTransfer = value.sub(totalfee); _balances[to] = _balances[to].add(tokensToTransfer); _totalSupply = _totalSupply.sub(burn); _balances[jackpot] = _balances[jackpot].add(jackpotfee); _allowed[from][msg.sender] = _allowed[from][msg.sender].sub(value); emit Transfer(from, to, tokensToTransfer); emit Transfer(from, address(0), burn); emit Transfer(msg.sender, address(jackpot), jackpotfee); return true; } /** * @dev Increase the amount of tokens that an owner allowed to a spender. * approve should be called when allowed_[_spender] == 0. To increment * allowed value is better to use this function to avoid 2 calls (and wait until * the first transaction is mined) * @param spender The address which will spend the funds. * @param addedValue The amount of tokens to increase the allowance by. */ function increaseAllowance(address spender, uint256 addedValue) public returns (bool) { require(spender != address(0)); _allowed[msg.sender][spender] = (_allowed[msg.sender][spender].add(addedValue)); emit Approval(msg.sender, spender, _allowed[msg.sender][spender]); return true; } /** * @dev Decrease the amount of tokens that an owner allowed to a spender. * approve should be called when allowed_[_spender] == 0. To decrement * allowed value is better to use this function to avoid 2 calls (and wait until * the first transaction is mined) * @param spender The address which will spend the funds. * @param subtractedValue The amount of tokens to decrease the allowance by. */ function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool) { require(spender != address(0)); _allowed[msg.sender][spender] = (_allowed[msg.sender][spender].sub(subtractedValue)); emit Approval(msg.sender, spender, _allowed[msg.sender][spender]); return true; } }

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{"success": true, "error": null, "results": {"detectors": [{"check": "uninitialized-local", "impact": "Medium", "confidence": "Medium"}, {"check": "locked-ether", "impact": "Medium", "confidence": "High"}]}}

0x70863a3415835C36F1b4db26e8bBC4A7a5Eb50bd

pragma solidity 0.5.17; pragma experimental ABIEncoderV2; interface PotLike { function chi() external view returns (uint); function pie(address) external view returns (uint); function drip() external returns (uint); function join(uint) external; function exit(uint) external; } interface GemLike { function approve(address, uint) external; function balanceOf(address) external view returns (uint); function transferFrom(address, address, uint) external returns (bool); } interface VatLike { function dai(address) external view returns (uint); function hope(address) external; } interface DaiJoinLike { function vat() external returns (VatLike); function dai() external returns (GemLike); function join(address, uint) external payable; function exit(address, uint) external; } contract CTokenStorage { /** * @dev Guard variable for re-entrancy checks */ bool internal _notEntered; /** * @notice EIP-20 token name for this token */ string public name; /** * @notice EIP-20 token symbol for this token */ string public symbol; /** * @notice EIP-20 token decimals for this token */ uint8 public decimals; /** * @notice Maximum borrow rate that can ever be applied (.0005% / block) */ uint internal constant borrowRateMaxMantissa = 0.0005e16; /** * @notice Maximum fraction of interest that can be set aside for reserves */ uint internal constant reserveFactorMaxMantissa = 1e18; /** * @notice Administrator for this contract */ address payable public admin; /** * @notice Pending administrator for this contract */ address payable public pendingAdmin; /** * @notice Contract which oversees inter-cToken operations */ ComptrollerInterface public comptroller; /** * @notice Model which tells what the current interest rate should be */ InterestRateModel public interestRateModel; /** * @notice Initial exchange rate used when minting the first CTokens (used when totalSupply = 0) */ uint internal initialExchangeRateMantissa; /** * @notice Fraction of interest currently set aside for reserves */ uint public reserveFactorMantissa; /** * @notice Block number that interest was last accrued at */ uint public accrualBlockNumber; /** * @notice Accumulator of the total earned interest rate since the opening of the market */ uint public borrowIndex; /** * @notice Total amount of outstanding borrows of the underlying in this market */ uint public totalBorrows; /** * @notice Total amount of reserves of the underlying held in this market */ uint public totalReserves; /** * @notice Total number of tokens in circulation */ uint public totalSupply; /** * @notice Official record of token balances for each account */ mapping (address => uint) internal accountTokens; /** * @notice Approved token transfer amounts on behalf of others */ mapping (address => mapping (address => uint)) internal transferAllowances; /** * @notice Container for borrow balance information * @member principal Total balance (with accrued interest), after applying the most recent balance-changing action * @member interestIndex Global borrowIndex as of the most recent balance-changing action */ struct BorrowSnapshot { uint principal; uint interestIndex; } /** * @notice Mapping of account addresses to outstanding borrow balances */ mapping(address => BorrowSnapshot) internal accountBorrows; } contract CTokenInterface is CTokenStorage { /** * @notice Indicator that this is a CToken contract (for inspection) */ bool public constant isCToken = true; /*** Market Events ***/ /** * @notice Event emitted when interest is accrued */ event AccrueInterest(uint cashPrior, uint interestAccumulated, uint borrowIndex, uint totalBorrows); /** * @notice Event emitted when tokens are minted */ event Mint(address minter, uint mintAmount, uint mintTokens); /** * @notice Event emitted when tokens are redeemed */ event Redeem(address redeemer, uint redeemAmount, uint redeemTokens); /** * @notice Event emitted when underlying is borrowed */ event Borrow(address borrower, uint borrowAmount, uint accountBorrows, uint totalBorrows); /** * @notice Event emitted when a borrow is repaid */ event RepayBorrow(address payer, address borrower, uint repayAmount, uint accountBorrows, uint totalBorrows); /** * @notice Event emitted when a borrow is liquidated */ event LiquidateBorrow(address liquidator, address borrower, uint repayAmount, address cTokenCollateral, uint seizeTokens); /*** Admin Events ***/ /** * @notice Event emitted when pendingAdmin is changed */ event NewPendingAdmin(address oldPendingAdmin, address newPendingAdmin); /** * @notice Event emitted when pendingAdmin is accepted, which means admin is updated */ event NewAdmin(address oldAdmin, address newAdmin); /** * @notice Event emitted when comptroller is changed */ event NewComptroller(ComptrollerInterface oldComptroller, ComptrollerInterface newComptroller); /** * @notice Event emitted when interestRateModel is changed */ event NewMarketInterestRateModel(InterestRateModel oldInterestRateModel, InterestRateModel newInterestRateModel); /** * @notice Event emitted when the reserve factor is changed */ event NewReserveFactor(uint oldReserveFactorMantissa, uint newReserveFactorMantissa); /** * @notice Event emitted when the reserves are added */ event ReservesAdded(address benefactor, uint addAmount, uint newTotalReserves); /** * @notice Event emitted when the reserves are reduced */ event ReservesReduced(address admin, uint reduceAmount, uint newTotalReserves); /** * @notice EIP20 Transfer event */ event Transfer(address indexed from, address indexed to, uint amount); /** * @notice EIP20 Approval event */ event Approval(address indexed owner, address indexed spender, uint amount); /** * @notice Failure event */ event Failure(uint error, uint info, uint detail); /*** User Interface ***/ function transfer(address dst, uint amount) external returns (bool); function transferFrom(address src, address dst, uint amount) external returns (bool); function approve(address spender, uint amount) external returns (bool); function allowance(address owner, address spender) external view returns (uint); function balanceOf(address owner) external view returns (uint); function balanceOfUnderlying(address owner) external returns (uint); function getAccountSnapshot(address account) external view returns (uint, uint, uint, uint); function borrowRatePerBlock() external view returns (uint); function supplyRatePerBlock() external view returns (uint); function totalBorrowsCurrent() external returns (uint); function borrowBalanceCurrent(address account) external returns (uint); function borrowBalanceStored(address account) public view returns (uint); function exchangeRateCurrent() public returns (uint); function exchangeRateStored() public view returns (uint); function getCash() external view returns (uint); function accrueInterest() public returns (uint); function seize(address liquidator, address borrower, uint seizeTokens) external returns (uint); /*** Admin Functions ***/ function _setPendingAdmin(address payable newPendingAdmin) external returns (uint); function _acceptAdmin() external returns (uint); function _setComptroller(ComptrollerInterface newComptroller) public returns (uint); function _setReserveFactor(uint newReserveFactorMantissa) external returns (uint); function _reduceReserves(uint reduceAmount) external returns (uint); function _setInterestRateModel(InterestRateModel newInterestRateModel) public returns (uint); } contract CErc20Storage { /** * @notice Underlying asset for this CToken */ address public underlying; } contract CErc20Interface is CErc20Storage { /*** User Interface ***/ function mint(uint mintAmount) external returns (uint); function redeem(uint redeemTokens) external returns (uint); function redeemUnderlying(uint redeemAmount) external returns (uint); function borrow(uint borrowAmount) external returns (uint); function repayBorrow(uint repayAmount) external returns (uint); function repayBorrowBehalf(address borrower, uint repayAmount) external returns (uint); function liquidateBorrow(address borrower, uint repayAmount, CTokenInterface cTokenCollateral) external returns (uint); /*** Admin Functions ***/ function _addReserves(uint addAmount) external returns (uint); } contract CDelegationStorage { /** * @notice Implementation address for this contract */ address public implementation; } contract CDelegatorInterface is CDelegationStorage { /** * @notice Emitted when implementation is changed */ event NewImplementation(address oldImplementation, address newImplementation); /** * @notice Called by the admin to update the implementation of the delegator * @param implementation_ The address of the new implementation for delegation * @param allowResign Flag to indicate whether to call _resignImplementation on the old implementation * @param becomeImplementationData The encoded bytes data to be passed to _becomeImplementation */ function _setImplementation(address implementation_, bool allowResign, bytes memory becomeImplementationData) public; } contract CDelegateInterface is CDelegationStorage { /** * @notice Called by the delegator on a delegate to initialize it for duty * @dev Should revert if any issues arise which make it unfit for delegation * @param data The encoded bytes data for any initialization */ function _becomeImplementation(bytes memory data) public; /** * @notice Called by the delegator on a delegate to forfeit its responsibility */ function _resignImplementation() public; } contract CarefulMath { /** * @dev Possible error codes that we can return */ enum MathError { NO_ERROR, DIVISION_BY_ZERO, INTEGER_OVERFLOW, INTEGER_UNDERFLOW } /** * @dev Multiplies two numbers, returns an error on overflow. */ function mulUInt(uint a, uint b) internal pure returns (MathError, uint) { if (a == 0) { return (MathError.NO_ERROR, 0); } uint c = a * b; if (c / a != b) { return (MathError.INTEGER_OVERFLOW, 0); } else { return (MathError.NO_ERROR, c); } } /** * @dev Integer division of two numbers, truncating the quotient. */ function divUInt(uint a, uint b) internal pure returns (MathError, uint) { if (b == 0) { return (MathError.DIVISION_BY_ZERO, 0); } return (MathError.NO_ERROR, a / b); } /** * @dev Subtracts two numbers, returns an error on overflow (i.e. if subtrahend is greater than minuend). */ function subUInt(uint a, uint b) internal pure returns (MathError, uint) { if (b <= a) { return (MathError.NO_ERROR, a - b); } else { return (MathError.INTEGER_UNDERFLOW, 0); } } /** * @dev Adds two numbers, returns an error on overflow. */ function addUInt(uint a, uint b) internal pure returns (MathError, uint) { uint c = a + b; if (c >= a) { return (MathError.NO_ERROR, c); } else { return (MathError.INTEGER_OVERFLOW, 0); } } /** * @dev add a and b and then subtract c */ function addThenSubUInt(uint a, uint b, uint c) internal pure returns (MathError, uint) { (MathError err0, uint sum) = addUInt(a, b); if (err0 != MathError.NO_ERROR) { return (err0, 0); } return subUInt(sum, c); } } contract Cheese { /// @notice EIP-20 token name for this token string public constant name = "Cheese"; /// @notice EIP-20 token symbol for this token string public constant symbol = "CHSTEST"; /// @notice EIP-20 token decimals for this token uint8 public constant decimals = 18; /// @notice Total number of tokens in circulation uint public constant totalSupply = 10000000e18; // 10 million Comp /// @notice Allowance amounts on behalf of others mapping (address => mapping (address => uint96)) internal allowances; /// @notice Official record of token balances for each account mapping (address => uint96) internal balances; /// @notice A record of each accounts delegate mapping (address => address) public delegates; /// @notice A checkpoint for marking number of votes from a given block struct Checkpoint { uint32 fromBlock; uint96 votes; } /// @notice A record of votes checkpoints for each account, by index mapping (address => mapping (uint32 => Checkpoint)) public checkpoints; /// @notice The number of checkpoints for each account mapping (address => uint32) public numCheckpoints; /// @notice The EIP-712 typehash for the contract's domain bytes32 public constant DOMAIN_TYPEHASH = keccak256("EIP712Domain(string name,uint256 chainId,address verifyingContract)"); /// @notice The EIP-712 typehash for the delegation struct used by the contract bytes32 public constant DELEGATION_TYPEHASH = keccak256("Delegation(address delegatee,uint256 nonce,uint256 expiry)"); /// @notice A record of states for signing / validating signatures mapping (address => uint) public nonces; /// @notice An event thats emitted when an account changes its delegate event DelegateChanged(address indexed delegator, address indexed fromDelegate, address indexed toDelegate); /// @notice An event thats emitted when a delegate account's vote balance changes event DelegateVotesChanged(address indexed delegate, uint previousBalance, uint newBalance); /// @notice The standard EIP-20 transfer event event Transfer(address indexed from, address indexed to, uint256 amount); /// @notice The standard EIP-20 approval event event Approval(address indexed owner, address indexed spender, uint256 amount); /** * @notice Construct a new Comp token * @param account The initial account to grant all the tokens */ constructor(address account) public { balances[account] = uint96(totalSupply); emit Transfer(address(0), account, totalSupply); } /** * @notice Get the number of tokens `spender` is approved to spend on behalf of `account` * @param account The address of the account holding the funds * @param spender The address of the account spending the funds * @return The number of tokens approved */ function allowance(address account, address spender) external view returns (uint) { return allowances[account][spender]; } /** * @notice Approve `spender` to transfer up to `amount` from `src` * @dev This will overwrite the approval amount for `spender` * and is subject to issues noted [here](https://eips.ethereum.org/EIPS/eip-20#approve) * @param spender The address of the account which may transfer tokens * @param rawAmount The number of tokens that are approved (2^256-1 means infinite) * @return Whether or not the approval succeeded */ function approve(address spender, uint rawAmount) external returns (bool) { uint96 amount; if (rawAmount == uint(-1)) { amount = uint96(-1); } else { amount = safe96(rawAmount, "Comp::approve: amount exceeds 96 bits"); } allowances[msg.sender][spender] = amount; emit Approval(msg.sender, spender, amount); return true; } /** * @notice Get the number of tokens held by the `account` * @param account The address of the account to get the balance of * @return The number of tokens held */ function balanceOf(address account) external view returns (uint) { return balances[account]; } /** * @notice Transfer `amount` tokens from `msg.sender` to `dst` * @param dst The address of the destination account * @param rawAmount The number of tokens to transfer * @return Whether or not the transfer succeeded */ function transfer(address dst, uint rawAmount) external returns (bool) { uint96 amount = safe96(rawAmount, "Comp::transfer: amount exceeds 96 bits"); _transferTokens(msg.sender, dst, amount); return true; } /** * @notice Transfer `amount` tokens from `src` to `dst` * @param src The address of the source account * @param dst The address of the destination account * @param rawAmount The number of tokens to transfer * @return Whether or not the transfer succeeded */ function transferFrom(address src, address dst, uint rawAmount) external returns (bool) { address spender = msg.sender; uint96 spenderAllowance = allowances[src][spender]; uint96 amount = safe96(rawAmount, "Comp::approve: amount exceeds 96 bits"); if (spender != src && spenderAllowance != uint96(-1)) { uint96 newAllowance = sub96(spenderAllowance, amount, "Comp::transferFrom: transfer amount exceeds spender allowance"); allowances[src][spender] = newAllowance; emit Approval(src, spender, newAllowance); } _transferTokens(src, dst, amount); return true; } /** * @notice Delegate votes from `msg.sender` to `delegatee` * @param delegatee The address to delegate votes to */ function delegate(address delegatee) public { return _delegate(msg.sender, delegatee); } /** * @notice Delegates votes from signatory to `delegatee` * @param delegatee The address to delegate votes to * @param nonce The contract state required to match the signature * @param expiry The time at which to expire the signature * @param v The recovery byte of the signature * @param r Half of the ECDSA signature pair * @param s Half of the ECDSA signature pair */ function delegateBySig(address delegatee, uint nonce, uint expiry, uint8 v, bytes32 r, bytes32 s) public { bytes32 domainSeparator = keccak256(abi.encode(DOMAIN_TYPEHASH, keccak256(bytes(name)), getChainId(), address(this))); bytes32 structHash = keccak256(abi.encode(DELEGATION_TYPEHASH, delegatee, nonce, expiry)); bytes32 digest = keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash)); address signatory = ecrecover(digest, v, r, s); require(signatory != address(0), "Comp::delegateBySig: invalid signature"); require(nonce == nonces[signatory]++, "Comp::delegateBySig: invalid nonce"); require(now <= expiry, "Comp::delegateBySig: signature expired"); return _delegate(signatory, delegatee); } /** * @notice Gets the current votes balance for `account` * @param account The address to get votes balance * @return The number of current votes for `account` */ function getCurrentVotes(address account) external view returns (uint96) { uint32 nCheckpoints = numCheckpoints[account]; return nCheckpoints > 0 ? checkpoints[account][nCheckpoints - 1].votes : 0; } /** * @notice Determine the prior number of votes for an account as of a block number * @dev Block number must be a finalized block or else this function will revert to prevent misinformation. * @param account The address of the account to check * @param blockNumber The block number to get the vote balance at * @return The number of votes the account had as of the given block */ function getPriorVotes(address account, uint blockNumber) public view returns (uint96) { require(blockNumber < block.number, "Comp::getPriorVotes: not yet determined"); uint32 nCheckpoints = numCheckpoints[account]; if (nCheckpoints == 0) { return 0; } // First check most recent balance if (checkpoints[account][nCheckpoints - 1].fromBlock <= blockNumber) { return checkpoints[account][nCheckpoints - 1].votes; } // Next check implicit zero balance if (checkpoints[account][0].fromBlock > blockNumber) { return 0; } uint32 lower = 0; uint32 upper = nCheckpoints - 1; while (upper > lower) { uint32 center = upper - (upper - lower) / 2; // ceil, avoiding overflow Checkpoint memory cp = checkpoints[account][center]; if (cp.fromBlock == blockNumber) { return cp.votes; } else if (cp.fromBlock < blockNumber) { lower = center; } else { upper = center - 1; } } return checkpoints[account][lower].votes; } function _delegate(address delegator, address delegatee) internal { address currentDelegate = delegates[delegator]; uint96 delegatorBalance = balances[delegator]; delegates[delegator] = delegatee; emit DelegateChanged(delegator, currentDelegate, delegatee); _moveDelegates(currentDelegate, delegatee, delegatorBalance); } function _transferTokens(address src, address dst, uint96 amount) internal { require(src != address(0), "Comp::_transferTokens: cannot transfer from the zero address"); require(dst != address(0), "Comp::_transferTokens: cannot transfer to the zero address"); balances[src] = sub96(balances[src], amount, "Comp::_transferTokens: transfer amount exceeds balance"); balances[dst] = add96(balances[dst], amount, "Comp::_transferTokens: transfer amount overflows"); emit Transfer(src, dst, amount); _moveDelegates(delegates[src], delegates[dst], amount); } function _moveDelegates(address srcRep, address dstRep, uint96 amount) internal { if (srcRep != dstRep && amount > 0) { if (srcRep != address(0)) { uint32 srcRepNum = numCheckpoints[srcRep]; uint96 srcRepOld = srcRepNum > 0 ? checkpoints[srcRep][srcRepNum - 1].votes : 0; uint96 srcRepNew = sub96(srcRepOld, amount, "Comp::_moveVotes: vote amount underflows"); _writeCheckpoint(srcRep, srcRepNum, srcRepOld, srcRepNew); } if (dstRep != address(0)) { uint32 dstRepNum = numCheckpoints[dstRep]; uint96 dstRepOld = dstRepNum > 0 ? checkpoints[dstRep][dstRepNum - 1].votes : 0; uint96 dstRepNew = add96(dstRepOld, amount, "Comp::_moveVotes: vote amount overflows"); _writeCheckpoint(dstRep, dstRepNum, dstRepOld, dstRepNew); } } } function _writeCheckpoint(address delegatee, uint32 nCheckpoints, uint96 oldVotes, uint96 newVotes) internal { uint32 blockNumber = safe32(block.number, "Comp::_writeCheckpoint: block number exceeds 32 bits"); if (nCheckpoints > 0 && checkpoints[delegatee][nCheckpoints - 1].fromBlock == blockNumber) { checkpoints[delegatee][nCheckpoints - 1].votes = newVotes; } else { checkpoints[delegatee][nCheckpoints] = Checkpoint(blockNumber, newVotes); numCheckpoints[delegatee] = nCheckpoints + 1; } emit DelegateVotesChanged(delegatee, oldVotes, newVotes); } function safe32(uint n, string memory errorMessage) internal pure returns (uint32) { require(n < 2**32, errorMessage); return uint32(n); } function safe96(uint n, string memory errorMessage) internal pure returns (uint96) { require(n < 2**96, errorMessage); return uint96(n); } function add96(uint96 a, uint96 b, string memory errorMessage) internal pure returns (uint96) { uint96 c = a + b; require(c >= a, errorMessage); return c; } function sub96(uint96 a, uint96 b, string memory errorMessage) internal pure returns (uint96) { require(b <= a, errorMessage); return a - b; } function getChainId() internal pure returns (uint) { uint256 chainId; assembly { chainId := chainid() } return chainId; } } contract ComptrollerInterface { /// @notice Indicator that this is a Comptroller contract (for inspection) bool public constant isComptroller = true; /*** Assets You Are In ***/ function enterMarkets(address[] calldata cTokens) external returns (uint[] memory); function exitMarket(address cToken) external returns (uint); /*** Policy Hooks ***/ function mintAllowed(address cToken, address minter, uint mintAmount) external returns (uint); function mintVerify(address cToken, address minter, uint mintAmount, uint mintTokens) external; function redeemAllowed(address cToken, address redeemer, uint redeemTokens) external returns (uint); function redeemVerify(address cToken, address redeemer, uint redeemAmount, uint redeemTokens) external; function borrowAllowed(address cToken, address borrower, uint borrowAmount) external returns (uint); function borrowVerify(address cToken, address borrower, uint borrowAmount) external; function repayBorrowAllowed( address cToken, address payer, address borrower, uint repayAmount) external returns (uint); function repayBorrowVerify( address cToken, address payer, address borrower, uint repayAmount, uint borrowerIndex) external; function liquidateBorrowAllowed( address cTokenBorrowed, address cTokenCollateral, address liquidator, address borrower, uint repayAmount) external returns (uint); function liquidateBorrowVerify( address cTokenBorrowed, address cTokenCollateral, address liquidator, address borrower, uint repayAmount, uint seizeTokens) external; function seizeAllowed( address cTokenCollateral, address cTokenBorrowed, address liquidator, address borrower, uint seizeTokens) external returns (uint); function seizeVerify( address cTokenCollateral, address cTokenBorrowed, address liquidator, address borrower, uint seizeTokens) external; function transferAllowed(address cToken, address src, address dst, uint transferTokens) external returns (uint); function transferVerify(address cToken, address src, address dst, uint transferTokens) external; /*** Liquidity/Liquidation Calculations ***/ function liquidateCalculateSeizeTokens( address cTokenBorrowed, address cTokenCollateral, uint repayAmount) external view returns (uint, uint); } contract UnitrollerAdminStorage { /** * @notice Administrator for this contract */ address public admin; /** * @notice Pending administrator for this contract */ address public pendingAdmin; /** * @notice Active brains of Unitroller */ address public comptrollerImplementation; /** * @notice Pending brains of Unitroller */ address public pendingComptrollerImplementation; } contract ComptrollerV1Storage is UnitrollerAdminStorage { /** * @notice Oracle which gives the price of any given asset */ PriceOracle public oracle; /** * @notice Multiplier used to calculate the maximum repayAmount when liquidating a borrow */ uint public closeFactorMantissa; /** * @notice Multiplier representing the discount on collateral that a liquidator receives */ uint public liquidationIncentiveMantissa; /** * @notice Max number of assets a single account can participate in (borrow or use as collateral) */ uint public maxAssets; /** * @notice Per-account mapping of "assets you are in", capped by maxAssets */ mapping(address => CToken[]) public accountAssets; } contract ComptrollerV2Storage is ComptrollerV1Storage { struct Market { /// @notice Whether or not this market is listed bool isListed; /** * @notice Multiplier representing the most one can borrow against their collateral in this market. * For instance, 0.9 to allow borrowing 90% of collateral value. * Must be between 0 and 1, and stored as a mantissa. */ uint collateralFactorMantissa; /// @notice Per-market mapping of "accounts in this asset" mapping(address => bool) accountMembership; /// @notice Whether or not this market receives COMP bool isComped; } /** * @notice Official mapping of cTokens -> Market metadata * @dev Used e.g. to determine if a market is supported */ mapping(address => Market) public markets; /** * @notice The Pause Guardian can pause certain actions as a safety mechanism. * Actions which allow users to remove their own assets cannot be paused. * Liquidation / seizing / transfer can only be paused globally, not by market. */ address public pauseGuardian; bool public _mintGuardianPaused; bool public _borrowGuardianPaused; bool public transferGuardianPaused; bool public seizeGuardianPaused; mapping(address => bool) public mintGuardianPaused; mapping(address => bool) public borrowGuardianPaused; } contract ComptrollerV3Storage is ComptrollerV2Storage { struct CompMarketState { /// @notice The market's last updated compBorrowIndex or compSupplyIndex uint224 index; /// @notice The block number the index was last updated at uint32 block; } /// @notice A list of all markets CToken[] public allMarkets; /// @notice The rate at which the flywheel distributes COMP, per block uint public compRate; /// @notice The portion of compRate that each market currently receives mapping(address => uint) public compSpeeds; /// @notice The mining cheese rule, 0 - minting by supply, 1 - minting by borrow uint public miningRule; /// @notice The COMP market supply state for each market mapping(address => CompMarketState) public compSupplyState; /// @notice The COMP market borrow state for each market mapping(address => CompMarketState) public compBorrowState; /// @notice The COMP borrow index for each market for each supplier as of the last time they accrued COMP mapping(address => mapping(address => uint)) public compSupplierIndex; /// @notice The COMP borrow index for each market for each borrower as of the last time they accrued COMP mapping(address => mapping(address => uint)) public compBorrowerIndex; /// @notice The COMP accrued but not yet transferred to each user mapping(address => uint) public compAccrued; /// @notice The mining CHEESE Buff mapping(address => uint) public miningBuff; } interface EIP20Interface { function name() external view returns (string memory); function symbol() external view returns (string memory); function decimals() external view returns (uint8); /** * @notice Get the total number of tokens in circulation * @return The supply of tokens */ function totalSupply() external view returns (uint256); /** * @notice Gets the balance of the specified address * @param owner The address from which the balance will be retrieved * @return The balance */ function balanceOf(address owner) external view returns (uint256 balance); /** * @notice Transfer `amount` tokens from `msg.sender` to `dst` * @param dst The address of the destination account * @param amount The number of tokens to transfer * @return Whether or not the transfer succeeded */ function transfer(address dst, uint256 amount) external returns (bool success); /** * @notice Transfer `amount` tokens from `src` to `dst` * @param src The address of the source account * @param dst The address of the destination account * @param amount The number of tokens to transfer * @return Whether or not the transfer succeeded */ function transferFrom(address src, address dst, uint256 amount) external returns (bool success); /** * @notice Approve `spender` to transfer up to `amount` from `src` * @dev This will overwrite the approval amount for `spender` * and is subject to issues noted [here](https://eips.ethereum.org/EIPS/eip-20#approve) * @param spender The address of the account which may transfer tokens * @param amount The number of tokens that are approved (-1 means infinite) * @return Whether or not the approval succeeded */ function approve(address spender, uint256 amount) external returns (bool success); /** * @notice Get the current allowance from `owner` for `spender` * @param owner The address of the account which owns the tokens to be spent * @param spender The address of the account which may transfer tokens * @return The number of tokens allowed to be spent (-1 means infinite) */ function allowance(address owner, address spender) external view returns (uint256 remaining); event Transfer(address indexed from, address indexed to, uint256 amount); event Approval(address indexed owner, address indexed spender, uint256 amount); } interface EIP20NonStandardInterface { /** * @notice Get the total number of tokens in circulation * @return The supply of tokens */ function totalSupply() external view returns (uint256); /** * @notice Gets the balance of the specified address * @param owner The address from which the balance will be retrieved * @return The balance */ function balanceOf(address owner) external view returns (uint256 balance); /// /// !!!!!!!!!!!!!! /// !!! NOTICE !!! `transfer` does not return a value, in violation of the ERC-20 specification /// !!!!!!!!!!!!!! /// /** * @notice Transfer `amount` tokens from `msg.sender` to `dst` * @param dst The address of the destination account * @param amount The number of tokens to transfer */ function transfer(address dst, uint256 amount) external; /// /// !!!!!!!!!!!!!! /// !!! NOTICE !!! `transferFrom` does not return a value, in violation of the ERC-20 specification /// !!!!!!!!!!!!!! /// /** * @notice Transfer `amount` tokens from `src` to `dst` * @param src The address of the source account * @param dst The address of the destination account * @param amount The number of tokens to transfer */ function transferFrom(address src, address dst, uint256 amount) external; /** * @notice Approve `spender` to transfer up to `amount` from `src` * @dev This will overwrite the approval amount for `spender` * and is subject to issues noted [here](https://eips.ethereum.org/EIPS/eip-20#approve) * @param spender The address of the account which may transfer tokens * @param amount The number of tokens that are approved * @return Whether or not the approval succeeded */ function approve(address spender, uint256 amount) external returns (bool success); /** * @notice Get the current allowance from `owner` for `spender` * @param owner The address of the account which owns the tokens to be spent * @param spender The address of the account which may transfer tokens * @return The number of tokens allowed to be spent */ function allowance(address owner, address spender) external view returns (uint256 remaining); event Transfer(address indexed from, address indexed to, uint256 amount); event Approval(address indexed owner, address indexed spender, uint256 amount); } contract ComptrollerErrorReporter { enum Error { NO_ERROR, //0 UNAUTHORIZED, //1 COMPTROLLER_MISMATCH, //2 INSUFFICIENT_SHORTFALL, //3 INSUFFICIENT_LIQUIDITY, //4 INVALID_CLOSE_FACTOR, INVALID_COLLATERAL_FACTOR, INVALID_LIQUIDATION_INCENTIVE, MARKET_NOT_ENTERED, // no longer possible MARKET_NOT_LISTED, MARKET_ALREADY_LISTED, MATH_ERROR, NONZERO_BORROW_BALANCE, PRICE_ERROR, REJECTION, SNAPSHOT_ERROR, TOO_MANY_ASSETS, TOO_MUCH_REPAY } enum FailureInfo { ACCEPT_ADMIN_PENDING_ADMIN_CHECK, ACCEPT_PENDING_IMPLEMENTATION_ADDRESS_CHECK, EXIT_MARKET_BALANCE_OWED, EXIT_MARKET_REJECTION, SET_CLOSE_FACTOR_OWNER_CHECK, SET_CLOSE_FACTOR_VALIDATION, SET_COLLATERAL_FACTOR_OWNER_CHECK, SET_COLLATERAL_FACTOR_NO_EXISTS, SET_COLLATERAL_FACTOR_VALIDATION, SET_COLLATERAL_FACTOR_WITHOUT_PRICE, SET_IMPLEMENTATION_OWNER_CHECK, SET_LIQUIDATION_INCENTIVE_OWNER_CHECK, SET_LIQUIDATION_INCENTIVE_VALIDATION, SET_MAX_ASSETS_OWNER_CHECK, SET_PENDING_ADMIN_OWNER_CHECK, SET_PENDING_IMPLEMENTATION_OWNER_CHECK, SET_PRICE_ORACLE_OWNER_CHECK, SUPPORT_MARKET_EXISTS, SUPPORT_MARKET_OWNER_CHECK, SET_PAUSE_GUARDIAN_OWNER_CHECK } /** * @dev `error` corresponds to enum Error; `info` corresponds to enum FailureInfo, and `detail` is an arbitrary * contract-specific code that enables us to report opaque error codes from upgradeable contracts. **/ event Failure(uint error, uint info, uint detail); /** * @dev use this when reporting a known error from the money market or a non-upgradeable collaborator */ function fail(Error err, FailureInfo info) internal returns (uint) { emit Failure(uint(err), uint(info), 0); return uint(err); } /** * @dev use this when reporting an opaque error from an upgradeable collaborator contract */ function failOpaque(Error err, FailureInfo info, uint opaqueError) internal returns (uint) { emit Failure(uint(err), uint(info), opaqueError); return uint(err); } } contract TokenErrorReporter { enum Error { NO_ERROR, //0 UNAUTHORIZED, //1 BAD_INPUT, //2 COMPTROLLER_REJECTION, //3 COMPTROLLER_CALCULATION_ERROR, INTEREST_RATE_MODEL_ERROR, INVALID_ACCOUNT_PAIR, INVALID_CLOSE_AMOUNT_REQUESTED, INVALID_COLLATERAL_FACTOR, MATH_ERROR, MARKET_NOT_FRESH, MARKET_NOT_LISTED, TOKEN_INSUFFICIENT_ALLOWANCE, TOKEN_INSUFFICIENT_BALANCE, TOKEN_INSUFFICIENT_CASH, TOKEN_TRANSFER_IN_FAILED, TOKEN_TRANSFER_OUT_FAILED } /* * Note: FailureInfo (but not Error) is kept in alphabetical order * This is because FailureInfo grows significantly faster, and * the order of Error has some meaning, while the order of FailureInfo * is entirely arbitrary. */ enum FailureInfo { ACCEPT_ADMIN_PENDING_ADMIN_CHECK, //0 ACCRUE_INTEREST_ACCUMULATED_INTEREST_CALCULATION_FAILED, //1 ACCRUE_INTEREST_BORROW_RATE_CALCULATION_FAILED, //2 ACCRUE_INTEREST_NEW_BORROW_INDEX_CALCULATION_FAILED, //3 ACCRUE_INTEREST_NEW_TOTAL_BORROWS_CALCULATION_FAILED, //4 ACCRUE_INTEREST_NEW_TOTAL_RESERVES_CALCULATION_FAILED, //5 ACCRUE_INTEREST_SIMPLE_INTEREST_FACTOR_CALCULATION_FAILED, //6 BORROW_ACCUMULATED_BALANCE_CALCULATION_FAILED, //7 BORROW_ACCRUE_INTEREST_FAILED, //8 BORROW_CASH_NOT_AVAILABLE, //9 BORROW_FRESHNESS_CHECK, //10 BORROW_NEW_TOTAL_BALANCE_CALCULATION_FAILED, //11 BORROW_NEW_ACCOUNT_BORROW_BALANCE_CALCULATION_FAILED, //12 BORROW_MARKET_NOT_LISTED, //13 BORROW_COMPTROLLER_REJECTION, //14 LIQUIDATE_ACCRUE_BORROW_INTEREST_FAILED, LIQUIDATE_ACCRUE_COLLATERAL_INTEREST_FAILED, LIQUIDATE_COLLATERAL_FRESHNESS_CHECK, LIQUIDATE_COMPTROLLER_REJECTION, LIQUIDATE_COMPTROLLER_CALCULATE_AMOUNT_SEIZE_FAILED, LIQUIDATE_CLOSE_AMOUNT_IS_UINT_MAX, LIQUIDATE_CLOSE_AMOUNT_IS_ZERO, LIQUIDATE_FRESHNESS_CHECK, LIQUIDATE_LIQUIDATOR_IS_BORROWER, LIQUIDATE_REPAY_BORROW_FRESH_FAILED, LIQUIDATE_SEIZE_BALANCE_INCREMENT_FAILED, LIQUIDATE_SEIZE_BALANCE_DECREMENT_FAILED, LIQUIDATE_SEIZE_COMPTROLLER_REJECTION, LIQUIDATE_SEIZE_LIQUIDATOR_IS_BORROWER, LIQUIDATE_SEIZE_TOO_MUCH, MINT_ACCRUE_INTEREST_FAILED, MINT_COMPTROLLER_REJECTION, MINT_EXCHANGE_CALCULATION_FAILED, MINT_EXCHANGE_RATE_READ_FAILED, MINT_FRESHNESS_CHECK, MINT_NEW_ACCOUNT_BALANCE_CALCULATION_FAILED, MINT_NEW_TOTAL_SUPPLY_CALCULATION_FAILED, MINT_TRANSFER_IN_FAILED, MINT_TRANSFER_IN_NOT_POSSIBLE, REDEEM_ACCRUE_INTEREST_FAILED, REDEEM_COMPTROLLER_REJECTION, REDEEM_EXCHANGE_TOKENS_CALCULATION_FAILED, REDEEM_EXCHANGE_AMOUNT_CALCULATION_FAILED, REDEEM_EXCHANGE_RATE_READ_FAILED, REDEEM_FRESHNESS_CHECK, REDEEM_NEW_ACCOUNT_BALANCE_CALCULATION_FAILED, REDEEM_NEW_TOTAL_SUPPLY_CALCULATION_FAILED, REDEEM_TRANSFER_OUT_NOT_POSSIBLE, REDUCE_RESERVES_ACCRUE_INTEREST_FAILED, REDUCE_RESERVES_ADMIN_CHECK, REDUCE_RESERVES_CASH_NOT_AVAILABLE, REDUCE_RESERVES_FRESH_CHECK, REDUCE_RESERVES_VALIDATION, REPAY_BEHALF_ACCRUE_INTEREST_FAILED, REPAY_BORROW_ACCRUE_INTEREST_FAILED, REPAY_BORROW_ACCUMULATED_BALANCE_CALCULATION_FAILED, REPAY_BORROW_COMPTROLLER_REJECTION, REPAY_BORROW_FRESHNESS_CHECK, REPAY_BORROW_NEW_ACCOUNT_BORROW_BALANCE_CALCULATION_FAILED, REPAY_BORROW_NEW_TOTAL_BALANCE_CALCULATION_FAILED, REPAY_BORROW_TRANSFER_IN_NOT_POSSIBLE, SET_COLLATERAL_FACTOR_OWNER_CHECK, SET_COLLATERAL_FACTOR_VALIDATION, SET_COMPTROLLER_OWNER_CHECK, SET_INTEREST_RATE_MODEL_ACCRUE_INTEREST_FAILED, SET_INTEREST_RATE_MODEL_FRESH_CHECK, SET_INTEREST_RATE_MODEL_OWNER_CHECK, SET_MAX_ASSETS_OWNER_CHECK, SET_ORACLE_MARKET_NOT_LISTED, SET_PENDING_ADMIN_OWNER_CHECK, SET_RESERVE_FACTOR_ACCRUE_INTEREST_FAILED, SET_RESERVE_FACTOR_ADMIN_CHECK, SET_RESERVE_FACTOR_FRESH_CHECK, SET_RESERVE_FACTOR_BOUNDS_CHECK, TRANSFER_COMPTROLLER_REJECTION, TRANSFER_NOT_ALLOWED, TRANSFER_NOT_ENOUGH, TRANSFER_TOO_MUCH, ADD_RESERVES_ACCRUE_INTEREST_FAILED, ADD_RESERVES_FRESH_CHECK, ADD_RESERVES_TRANSFER_IN_NOT_POSSIBLE } /** * @dev `error` corresponds to enum Error; `info` corresponds to enum FailureInfo, and `detail` is an arbitrary * contract-specific code that enables us to report opaque error codes from upgradeable contracts. **/ event Failure(uint error, uint info, uint detail); /** * @dev use this when reporting a known error from the money market or a non-upgradeable collaborator */ function fail(Error err, FailureInfo info) internal returns (uint) { emit Failure(uint(err), uint(info), 0); return uint(err); } /** * @dev use this when reporting an opaque error from an upgradeable collaborator contract */ function failOpaque(Error err, FailureInfo info, uint opaqueError) internal returns (uint) { emit Failure(uint(err), uint(info), opaqueError); return uint(err); } } contract Exponential is CarefulMath { uint constant expScale = 1e18; uint constant doubleScale = 1e36; uint constant halfExpScale = expScale/2; uint constant mantissaOne = expScale; struct Exp { uint mantissa; } struct Double { uint mantissa; } /** * @dev Creates an exponential from numerator and denominator values. * Note: Returns an error if (`num` * 10e18) > MAX_INT, * or if `denom` is zero. */ function getExp(uint num, uint denom) pure internal returns (MathError, Exp memory) { (MathError err0, uint scaledNumerator) = mulUInt(num, expScale); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } (MathError err1, uint rational) = divUInt(scaledNumerator, denom); if (err1 != MathError.NO_ERROR) { return (err1, Exp({mantissa: 0})); } return (MathError.NO_ERROR, Exp({mantissa: rational})); } /** * @dev Adds two exponentials, returning a new exponential. */ function addExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) { (MathError error, uint result) = addUInt(a.mantissa, b.mantissa); return (error, Exp({mantissa: result})); } /** * @dev Subtracts two exponentials, returning a new exponential. */ function subExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) { (MathError error, uint result) = subUInt(a.mantissa, b.mantissa); return (error, Exp({mantissa: result})); } /** * @dev Multiply an Exp by a scalar, returning a new Exp. */ function mulScalar(Exp memory a, uint scalar) pure internal returns (MathError, Exp memory) { (MathError err0, uint scaledMantissa) = mulUInt(a.mantissa, scalar); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } return (MathError.NO_ERROR, Exp({mantissa: scaledMantissa})); } /** * @dev Multiply an Exp by a scalar, then truncate to return an unsigned integer. */ function mulScalarTruncate(Exp memory a, uint scalar) pure internal returns (MathError, uint) { (MathError err, Exp memory product) = mulScalar(a, scalar); if (err != MathError.NO_ERROR) { return (err, 0); } return (MathError.NO_ERROR, truncate(product)); } /** * @dev Multiply an Exp by a scalar, truncate, then add an to an unsigned integer, returning an unsigned integer. */ function mulScalarTruncateAddUInt(Exp memory a, uint scalar, uint addend) pure internal returns (MathError, uint) { (MathError err, Exp memory product) = mulScalar(a, scalar); if (err != MathError.NO_ERROR) { return (err, 0); } return addUInt(truncate(product), addend); } /** * @dev Divide an Exp by a scalar, returning a new Exp. */ function divScalar(Exp memory a, uint scalar) pure internal returns (MathError, Exp memory) { (MathError err0, uint descaledMantissa) = divUInt(a.mantissa, scalar); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } return (MathError.NO_ERROR, Exp({mantissa: descaledMantissa})); } /** * @dev Divide a scalar by an Exp, returning a new Exp. */ function divScalarByExp(uint scalar, Exp memory divisor) pure internal returns (MathError, Exp memory) { /* We are doing this as: getExp(mulUInt(expScale, scalar), divisor.mantissa) How it works: Exp = a / b; Scalar = s; `s / (a / b)` = `b * s / a` and since for an Exp `a = mantissa, b = expScale` */ (MathError err0, uint numerator) = mulUInt(expScale, scalar); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } return getExp(numerator, divisor.mantissa); } /** * @dev Divide a scalar by an Exp, then truncate to return an unsigned integer. */ function divScalarByExpTruncate(uint scalar, Exp memory divisor) pure internal returns (MathError, uint) { (MathError err, Exp memory fraction) = divScalarByExp(scalar, divisor); if (err != MathError.NO_ERROR) { return (err, 0); } return (MathError.NO_ERROR, truncate(fraction)); } /** * @dev Multiplies two exponentials, returning a new exponential. */ function mulExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) { (MathError err0, uint doubleScaledProduct) = mulUInt(a.mantissa, b.mantissa); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } // We add half the scale before dividing so that we get rounding instead of truncation. // See "Listing 6" and text above it at https://accu.org/index.php/journals/1717 // Without this change, a result like 6.6...e-19 will be truncated to 0 instead of being rounded to 1e-18. (MathError err1, uint doubleScaledProductWithHalfScale) = addUInt(halfExpScale, doubleScaledProduct); if (err1 != MathError.NO_ERROR) { return (err1, Exp({mantissa: 0})); } (MathError err2, uint product) = divUInt(doubleScaledProductWithHalfScale, expScale); // The only error `div` can return is MathError.DIVISION_BY_ZERO but we control `expScale` and it is not zero. assert(err2 == MathError.NO_ERROR); return (MathError.NO_ERROR, Exp({mantissa: product})); } /** * @dev Multiplies two exponentials given their mantissas, returning a new exponential. */ function mulExp(uint a, uint b) pure internal returns (MathError, Exp memory) { return mulExp(Exp({mantissa: a}), Exp({mantissa: b})); } /** * @dev Multiplies three exponentials, returning a new exponential. */ function mulExp3(Exp memory a, Exp memory b, Exp memory c) pure internal returns (MathError, Exp memory) { (MathError err, Exp memory ab) = mulExp(a, b); if (err != MathError.NO_ERROR) { return (err, ab); } return mulExp(ab, c); } /** * @dev Divides two exponentials, returning a new exponential. * (a/scale) / (b/scale) = (a/scale) * (scale/b) = a/b, * which we can scale as an Exp by calling getExp(a.mantissa, b.mantissa) */ function divExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) { return getExp(a.mantissa, b.mantissa); } /** * @dev Truncates the given exp to a whole number value. * For example, truncate(Exp{mantissa: 15 * expScale}) = 15 */ function truncate(Exp memory exp) pure internal returns (uint) { // Note: We are not using careful math here as we're performing a division that cannot fail return exp.mantissa / expScale; } /** * @dev Checks if first Exp is less than second Exp. */ function lessThanExp(Exp memory left, Exp memory right) pure internal returns (bool) { return left.mantissa < right.mantissa; } /** * @dev Checks if left Exp <= right Exp. */ function lessThanOrEqualExp(Exp memory left, Exp memory right) pure internal returns (bool) { return left.mantissa <= right.mantissa; } /** * @dev Checks if left Exp > right Exp. */ function greaterThanExp(Exp memory left, Exp memory right) pure internal returns (bool) { return left.mantissa > right.mantissa; } /** * @dev returns true if Exp is exactly zero */ function isZeroExp(Exp memory value) pure internal returns (bool) { return value.mantissa == 0; } function safe224(uint n, string memory errorMessage) pure internal returns (uint224) { require(n < 2**224, errorMessage); return uint224(n); } function safe32(uint n, string memory errorMessage) pure internal returns (uint32) { require(n < 2**32, errorMessage); return uint32(n); } function add_(Exp memory a, Exp memory b) pure internal returns (Exp memory) { return Exp({mantissa: add_(a.mantissa, b.mantissa)}); } function add_(Double memory a, Double memory b) pure internal returns (Double memory) { return Double({mantissa: add_(a.mantissa, b.mantissa)}); } function add_(uint a, uint b) pure internal returns (uint) { return add_(a, b, "addition overflow"); } function add_(uint a, uint b, string memory errorMessage) pure internal returns (uint) { uint c = a + b; require(c >= a, errorMessage); return c; } function sub_(Exp memory a, Exp memory b) pure internal returns (Exp memory) { return Exp({mantissa: sub_(a.mantissa, b.mantissa)}); } function sub_(Double memory a, Double memory b) pure internal returns (Double memory) { return Double({mantissa: sub_(a.mantissa, b.mantissa)}); } function sub_(uint a, uint b) pure internal returns (uint) { return sub_(a, b, "subtraction underflow"); } function sub_(uint a, uint b, string memory errorMessage) pure internal returns (uint) { require(b <= a, errorMessage); return a - b; } function mul_(Exp memory a, Exp memory b) pure internal returns (Exp memory) { return Exp({mantissa: mul_(a.mantissa, b.mantissa) / expScale}); } function mul_(Exp memory a, uint b) pure internal returns (Exp memory) { return Exp({mantissa: mul_(a.mantissa, b)}); } function mul_(uint a, Exp memory b) pure internal returns (uint) { return mul_(a, b.mantissa) / expScale; } function mul_(Double memory a, Double memory b) pure internal returns (Double memory) { return Double({mantissa: mul_(a.mantissa, b.mantissa) / doubleScale}); } function mul_(Double memory a, uint b) pure internal returns (Double memory) { return Double({mantissa: mul_(a.mantissa, b)}); } function mul_(uint a, Double memory b) pure internal returns (uint) { return mul_(a, b.mantissa) / doubleScale; } function mul_(uint a, uint b) pure internal returns (uint) { return mul_(a, b, "multiplication overflow"); } function mul_(uint a, uint b, string memory errorMessage) pure internal returns (uint) { if (a == 0 || b == 0) { return 0; } uint c = a * b; require(c / a == b, errorMessage); return c; } function div_(Exp memory a, Exp memory b) pure internal returns (Exp memory) { return Exp({mantissa: div_(mul_(a.mantissa, expScale), b.mantissa)}); } function div_(Exp memory a, uint b) pure internal returns (Exp memory) { return Exp({mantissa: div_(a.mantissa, b)}); } function div_(uint a, Exp memory b) pure internal returns (uint) { return div_(mul_(a, expScale), b.mantissa); } function div_(Double memory a, Double memory b) pure internal returns (Double memory) { return Double({mantissa: div_(mul_(a.mantissa, doubleScale), b.mantissa)}); } function div_(Double memory a, uint b) pure internal returns (Double memory) { return Double({mantissa: div_(a.mantissa, b)}); } function div_(uint a, Double memory b) pure internal returns (uint) { return div_(mul_(a, doubleScale), b.mantissa); } function div_(uint a, uint b) pure internal returns (uint) { return div_(a, b, "divide by zero"); } function div_(uint a, uint b, string memory errorMessage) pure internal returns (uint) { require(b > 0, errorMessage); return a / b; } function fraction(uint a, uint b) pure internal returns (Double memory) { return Double({mantissa: div_(mul_(a, doubleScale), b)}); } } contract InterestRateModel { /// @notice Indicator that this is an InterestRateModel contract (for inspection) bool public constant isInterestRateModel = true; /** * @notice Calculates the current borrow interest rate per block * @param cash The total amount of cash the market has * @param borrows The total amount of borrows the market has outstanding * @param reserves The total amnount of reserves the market has * @return The borrow rate per block (as a percentage, and scaled by 1e18) */ function getBorrowRate(uint cash, uint borrows, uint reserves) external view returns (uint); /** * @notice Calculates the current supply interest rate per block * @param cash The total amount of cash the market has * @param borrows The total amount of borrows the market has outstanding * @param reserves The total amnount of reserves the market has * @param reserveFactorMantissa The current reserve factor the market has * @return The supply rate per block (as a percentage, and scaled by 1e18) */ function getSupplyRate(uint cash, uint borrows, uint reserves, uint reserveFactorMantissa) external view returns (uint); } contract PriceOracle { /// @notice Indicator that this is a PriceOracle contract (for inspection) bool public constant isPriceOracle = true; /** * @notice Get the underlying price of a cToken asset * @param sToken The cToken to get the underlying price of * @return The underlying asset price mantissa (scaled by 1e18). * Zero means the price is unavailable. */ function getUnderlyingPrice(CToken sToken) external view returns (uint); } library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the addition of two unsigned integers, reverting with custom message on overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * - Addition cannot overflow. */ function add(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, errorMessage); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on underflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot underflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction underflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on underflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot underflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, errorMessage); return c; } /** * @dev Returns the integer division of two unsigned integers. * Reverts on division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. * Reverts with custom message on division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { // Solidity only automatically asserts when dividing by 0 require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } contract Unitroller is UnitrollerAdminStorage, ComptrollerErrorReporter { /** * @notice Emitted when pendingComptrollerImplementation is changed */ event NewPendingImplementation(address oldPendingImplementation, address newPendingImplementation); /** * @notice Emitted when pendingComptrollerImplementation is accepted, which means comptroller implementation is updated */ event NewImplementation(address oldImplementation, address newImplementation); /** * @notice Emitted when pendingAdmin is changed */ event NewPendingAdmin(address oldPendingAdmin, address newPendingAdmin); /** * @notice Emitted when pendingAdmin is accepted, which means admin is updated */ event NewAdmin(address oldAdmin, address newAdmin); constructor() public { // Set admin to caller admin = msg.sender; } /*** Admin Functions ***/ function _setPendingImplementation(address newPendingImplementation) public returns (uint) { if (msg.sender != admin) { return fail(Error.UNAUTHORIZED, FailureInfo.SET_PENDING_IMPLEMENTATION_OWNER_CHECK); } address oldPendingImplementation = pendingComptrollerImplementation; pendingComptrollerImplementation = newPendingImplementation; emit NewPendingImplementation(oldPendingImplementation, pendingComptrollerImplementation); return uint(Error.NO_ERROR); } /** * @notice Accepts new implementation of comptroller. msg.sender must be pendingImplementation * @dev Admin function for new implementation to accept it's role as implementation * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _acceptImplementation() public returns (uint) { // Check caller is pendingImplementation and pendingImplementation ≠ address(0) if (msg.sender != pendingComptrollerImplementation || pendingComptrollerImplementation == address(0)) { return fail(Error.UNAUTHORIZED, FailureInfo.ACCEPT_PENDING_IMPLEMENTATION_ADDRESS_CHECK); } // Save current values for inclusion in log address oldImplementation = comptrollerImplementation; address oldPendingImplementation = pendingComptrollerImplementation; comptrollerImplementation = pendingComptrollerImplementation; pendingComptrollerImplementation = address(0); emit NewImplementation(oldImplementation, comptrollerImplementation); emit NewPendingImplementation(oldPendingImplementation, pendingComptrollerImplementation); return uint(Error.NO_ERROR); } /** * @notice Begins transfer of admin rights. The newPendingAdmin must call `_acceptAdmin` to finalize the transfer. * @dev Admin function to begin change of admin. The newPendingAdmin must call `_acceptAdmin` to finalize the transfer. * @param newPendingAdmin New pending admin. * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _setPendingAdmin(address newPendingAdmin) public returns (uint) { // Check caller = admin if (msg.sender != admin) { return fail(Error.UNAUTHORIZED, FailureInfo.SET_PENDING_ADMIN_OWNER_CHECK); } // Save current value, if any, for inclusion in log address oldPendingAdmin = pendingAdmin; // Store pendingAdmin with value newPendingAdmin pendingAdmin = newPendingAdmin; // Emit NewPendingAdmin(oldPendingAdmin, newPendingAdmin) emit NewPendingAdmin(oldPendingAdmin, newPendingAdmin); return uint(Error.NO_ERROR); } /** * @notice Accepts transfer of admin rights. msg.sender must be pendingAdmin * @dev Admin function for pending admin to accept role and update admin * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _acceptAdmin() public returns (uint) { // Check caller is pendingAdmin and pendingAdmin ≠ address(0) if (msg.sender != pendingAdmin || msg.sender == address(0)) { return fail(Error.UNAUTHORIZED, FailureInfo.ACCEPT_ADMIN_PENDING_ADMIN_CHECK); } // Save current values for inclusion in log address oldAdmin = admin; address oldPendingAdmin = pendingAdmin; // Store admin with value pendingAdmin admin = pendingAdmin; // Clear the pending value pendingAdmin = address(0); emit NewAdmin(oldAdmin, admin); emit NewPendingAdmin(oldPendingAdmin, pendingAdmin); return uint(Error.NO_ERROR); } /** * @dev Delegates execution to an implementation contract. * It returns to the external caller whatever the implementation returns * or forwards reverts. */ function () payable external { // delegate all other functions to current implementation (bool success, ) = comptrollerImplementation.delegatecall(msg.data); assembly { let free_mem_ptr := mload(0x40) returndatacopy(free_mem_ptr, 0, returndatasize) switch success case 0 { revert(free_mem_ptr, returndatasize) } default { return(free_mem_ptr, returndatasize) } } } } contract CErc20Delegator is CTokenInterface, CErc20Interface, CDelegatorInterface { /** * @notice Construct a new money market * @param underlying_ The address of the underlying asset * @param comptroller_ The address of the Comptroller * @param interestRateModel_ The address of the interest rate model * @param initialExchangeRateMantissa_ The initial exchange rate, scaled by 1e18 * @param name_ ERC-20 name of this token * @param symbol_ ERC-20 symbol of this token * @param decimals_ ERC-20 decimal precision of this token * @param admin_ Address of the administrator of this token * @param implementation_ The address of the implementation the contract delegates to * @param becomeImplementationData The encoded args for becomeImplementation */ constructor(address underlying_, ComptrollerInterface comptroller_, InterestRateModel interestRateModel_, uint initialExchangeRateMantissa_, string memory name_, string memory symbol_, uint8 decimals_, address payable admin_, address implementation_, bytes memory becomeImplementationData) public { // Creator of the contract is admin during initialization admin = msg.sender; // First delegate gets to initialize the delegator (i.e. storage contract) delegateTo(implementation_, abi.encodeWithSignature("initialize(address,address,address,uint256,string,string,uint8)", underlying_, comptroller_, interestRateModel_, initialExchangeRateMantissa_, name_, symbol_, decimals_)); // New implementations always get set via the settor (post-initialize) _setImplementation(implementation_, false, becomeImplementationData); // Set the proper admin now that initialization is done admin = admin_; } /** * @notice Called by the admin to update the implementation of the delegator * @param implementation_ The address of the new implementation for delegation * @param allowResign Flag to indicate whether to call _resignImplementation on the old implementation * @param becomeImplementationData The encoded bytes data to be passed to _becomeImplementation */ function _setImplementation(address implementation_, bool allowResign, bytes memory becomeImplementationData) public { require(msg.sender == admin, "CErc20Delegator::_setImplementation: Caller must be admin"); if (allowResign) { delegateToImplementation(abi.encodeWithSignature("_resignImplementation()")); } address oldImplementation = implementation; implementation = implementation_; delegateToImplementation(abi.encodeWithSignature("_becomeImplementation(bytes)", becomeImplementationData)); emit NewImplementation(oldImplementation, implementation); } /** * @notice Sender supplies assets into the market and receives cTokens in exchange * @dev Accrues interest whether or not the operation succeeds, unless reverted * @param mintAmount The amount of the underlying asset to supply * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function mint(uint mintAmount) external returns (uint) { mintAmount; // Shh delegateAndReturn(); } /** * @notice Sender redeems cTokens in exchange for the underlying asset * @dev Accrues interest whether or not the operation succeeds, unless reverted * @param redeemTokens The number of cTokens to redeem into underlying * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function redeem(uint redeemTokens) external returns (uint) { redeemTokens; // Shh delegateAndReturn(); } /** * @notice Sender redeems cTokens in exchange for a specified amount of underlying asset * @dev Accrues interest whether or not the operation succeeds, unless reverted * @param redeemAmount The amount of underlying to redeem * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function redeemUnderlying(uint redeemAmount) external returns (uint) { redeemAmount; // Shh delegateAndReturn(); } /** * @notice Sender borrows assets from the protocol to their own address * @param borrowAmount The amount of the underlying asset to borrow * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function borrow(uint borrowAmount) external returns (uint) { borrowAmount; // Shh delegateAndReturn(); } /** * @notice Sender repays their own borrow * @param repayAmount The amount to repay * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function repayBorrow(uint repayAmount) external returns (uint) { repayAmount; // Shh delegateAndReturn(); } /** * @notice Sender repays a borrow belonging to borrower * @param borrower the account with the debt being payed off * @param repayAmount The amount to repay * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function repayBorrowBehalf(address borrower, uint repayAmount) external returns (uint) { borrower; repayAmount; // Shh delegateAndReturn(); } /** * @notice The sender liquidates the borrowers collateral. * The collateral seized is transferred to the liquidator. * @param borrower The borrower of this cToken to be liquidated * @param cTokenCollateral The market in which to seize collateral from the borrower * @param repayAmount The amount of the underlying borrowed asset to repay * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function liquidateBorrow(address borrower, uint repayAmount, CTokenInterface cTokenCollateral) external returns (uint) { borrower; repayAmount; cTokenCollateral; // Shh delegateAndReturn(); } /** * @notice Transfer `amount` tokens from `msg.sender` to `dst` * @param dst The address of the destination account * @param amount The number of tokens to transfer * @return Whether or not the transfer succeeded */ function transfer(address dst, uint amount) external returns (bool) { dst; amount; // Shh delegateAndReturn(); } /** * @notice Transfer `amount` tokens from `src` to `dst` * @param src The address of the source account * @param dst The address of the destination account * @param amount The number of tokens to transfer * @return Whether or not the transfer succeeded */ function transferFrom(address src, address dst, uint256 amount) external returns (bool) { src; dst; amount; // Shh delegateAndReturn(); } /** * @notice Approve `spender` to transfer up to `amount` from `src` * @dev This will overwrite the approval amount for `spender` * and is subject to issues noted [here](https://eips.ethereum.org/EIPS/eip-20#approve) * @param spender The address of the account which may transfer tokens * @param amount The number of tokens that are approved (-1 means infinite) * @return Whether or not the approval succeeded */ function approve(address spender, uint256 amount) external returns (bool) { spender; amount; // Shh delegateAndReturn(); } /** * @notice Get the current allowance from `owner` for `spender` * @param owner The address of the account which owns the tokens to be spent * @param spender The address of the account which may transfer tokens * @return The number of tokens allowed to be spent (-1 means infinite) */ function allowance(address owner, address spender) external view returns (uint) { owner; spender; // Shh delegateToViewAndReturn(); } /** * @notice Get the token balance of the `owner` * @param owner The address of the account to query * @return The number of tokens owned by `owner` */ function balanceOf(address owner) external view returns (uint) { owner; // Shh delegateToViewAndReturn(); } /** * @notice Get the underlying balance of the `owner` * @dev This also accrues interest in a transaction * @param owner The address of the account to query * @return The amount of underlying owned by `owner` */ function balanceOfUnderlying(address owner) external returns (uint) { owner; // Shh delegateAndReturn(); } /** * @notice Get a snapshot of the account's balances, and the cached exchange rate * @dev This is used by comptroller to more efficiently perform liquidity checks. * @param account Address of the account to snapshot * @return (possible error, token balance, borrow balance, exchange rate mantissa) */ function getAccountSnapshot(address account) external view returns (uint, uint, uint, uint) { account; // Shh delegateToViewAndReturn(); } /** * @notice Returns the current per-block borrow interest rate for this cToken * @return The borrow interest rate per block, scaled by 1e18 */ function borrowRatePerBlock() external view returns (uint) { delegateToViewAndReturn(); } /** * @notice Returns the current per-block supply interest rate for this cToken * @return The supply interest rate per block, scaled by 1e18 */ function supplyRatePerBlock() external view returns (uint) { delegateToViewAndReturn(); } /** * @notice Returns the current total borrows plus accrued interest * @return The total borrows with interest */ function totalBorrowsCurrent() external returns (uint) { delegateAndReturn(); } /** * @notice Accrue interest to updated borrowIndex and then calculate account's borrow balance using the updated borrowIndex * @param account The address whose balance should be calculated after updating borrowIndex * @return The calculated balance */ function borrowBalanceCurrent(address account) external returns (uint) { account; // Shh delegateAndReturn(); } /** * @notice Return the borrow balance of account based on stored data * @param account The address whose balance should be calculated * @return The calculated balance */ function borrowBalanceStored(address account) public view returns (uint) { account; // Shh delegateToViewAndReturn(); } /** * @notice Accrue interest then return the up-to-date exchange rate * @return Calculated exchange rate scaled by 1e18 */ function exchangeRateCurrent() public returns (uint) { delegateAndReturn(); } /** * @notice Calculates the exchange rate from the underlying to the CToken * @dev This function does not accrue interest before calculating the exchange rate * @return Calculated exchange rate scaled by 1e18 */ function exchangeRateStored() public view returns (uint) { delegateToViewAndReturn(); } /** * @notice Get cash balance of this cToken in the underlying asset * @return The quantity of underlying asset owned by this contract */ function getCash() external view returns (uint) { delegateToViewAndReturn(); } /** * @notice Applies accrued interest to total borrows and reserves. * @dev This calculates interest accrued from the last checkpointed block * up to the current block and writes new checkpoint to storage. */ function accrueInterest() public returns (uint) { delegateAndReturn(); } /** * @notice Transfers collateral tokens (this market) to the liquidator. * @dev Will fail unless called by another cToken during the process of liquidation. * Its absolutely critical to use msg.sender as the borrowed cToken and not a parameter. * @param liquidator The account receiving seized collateral * @param borrower The account having collateral seized * @param seizeTokens The number of cTokens to seize * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function seize(address liquidator, address borrower, uint seizeTokens) external returns (uint) { liquidator; borrower; seizeTokens; // Shh delegateAndReturn(); } /*** Admin Functions ***/ /** * @notice Begins transfer of admin rights. The newPendingAdmin must call `_acceptAdmin` to finalize the transfer. * @dev Admin function to begin change of admin. The newPendingAdmin must call `_acceptAdmin` to finalize the transfer. * @param newPendingAdmin New pending admin. * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _setPendingAdmin(address payable newPendingAdmin) external returns (uint) { newPendingAdmin; // Shh delegateAndReturn(); } /** * @notice Sets a new comptroller for the market * @dev Admin function to set a new comptroller * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _setComptroller(ComptrollerInterface newComptroller) public returns (uint) { newComptroller; // Shh delegateAndReturn(); } /** * @notice accrues interest and sets a new reserve factor for the protocol using _setReserveFactorFresh * @dev Admin function to accrue interest and set a new reserve factor * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _setReserveFactor(uint newReserveFactorMantissa) external returns (uint) { newReserveFactorMantissa; // Shh delegateAndReturn(); } /** * @notice Accepts transfer of admin rights. msg.sender must be pendingAdmin * @dev Admin function for pending admin to accept role and update admin * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _acceptAdmin() external returns (uint) { delegateAndReturn(); } /** * @notice Accrues interest and adds reserves by transferring from admin * @param addAmount Amount of reserves to add * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _addReserves(uint addAmount) external returns (uint) { addAmount; // Shh delegateAndReturn(); } /** * @notice Accrues interest and reduces reserves by transferring to admin * @param reduceAmount Amount of reduction to reserves * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _reduceReserves(uint reduceAmount) external returns (uint) { reduceAmount; // Shh delegateAndReturn(); } /** * @notice Accrues interest and updates the interest rate model using _setInterestRateModelFresh * @dev Admin function to accrue interest and update the interest rate model * @param newInterestRateModel the new interest rate model to use * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _setInterestRateModel(InterestRateModel newInterestRateModel) public returns (uint) { newInterestRateModel; // Shh delegateAndReturn(); } /** * @notice Internal method to delegate execution to another contract * @dev It returns to the external caller whatever the implementation returns or forwards reverts * @param callee The contract to delegatecall * @param data The raw data to delegatecall * @return The returned bytes from the delegatecall */ function delegateTo(address callee, bytes memory data) internal returns (bytes memory) { (bool success, bytes memory returnData) = callee.delegatecall(data); assembly { if eq(success, 0) { revert(add(returnData, 0x20), returndatasize) } } return returnData; } /** * @notice Delegates execution to the implementation contract * @dev It returns to the external caller whatever the implementation returns or forwards reverts * @param data The raw data to delegatecall * @return The returned bytes from the delegatecall */ function delegateToImplementation(bytes memory data) public returns (bytes memory) { return delegateTo(implementation, data); } /** * @notice Delegates execution to an implementation contract * @dev It returns to the external caller whatever the implementation returns or forwards reverts * There are an additional 2 prefix uints from the wrapper returndata, which we ignore since we make an extra hop. * @param data The raw data to delegatecall * @return The returned bytes from the delegatecall */ function delegateToViewImplementation(bytes memory data) public view returns (bytes memory) { (bool success, bytes memory returnData) = address(this).staticcall(abi.encodeWithSignature("delegateToImplementation(bytes)", data)); assembly { if eq(success, 0) { revert(add(returnData, 0x20), returndatasize) } } return abi.decode(returnData, (bytes)); } function delegateToViewAndReturn() private view returns (bytes memory) { (bool success, ) = address(this).staticcall(abi.encodeWithSignature("delegateToImplementation(bytes)", msg.data)); assembly { let free_mem_ptr := mload(0x40) returndatacopy(free_mem_ptr, 0, returndatasize) switch success case 0 { revert(free_mem_ptr, returndatasize) } default { return(add(free_mem_ptr, 0x40), returndatasize) } } } function delegateAndReturn() private returns (bytes memory) { (bool success, ) = implementation.delegatecall(msg.data); assembly { let free_mem_ptr := mload(0x40) returndatacopy(free_mem_ptr, 0, returndatasize) switch success case 0 { revert(free_mem_ptr, returndatasize) } default { return(free_mem_ptr, returndatasize) } } } /** * @notice Delegates execution to an implementation contract * @dev It returns to the external caller whatever the implementation returns or forwards reverts */ function () external payable { require(msg.value == 0,"CErc20Delegator:fallback: cannot send value to fallback"); // delegate all other functions to current implementation delegateAndReturn(); } } contract CToken is CTokenInterface, Exponential, TokenErrorReporter { /** * @notice Initialize the money market * @param comptroller_ The address of the Comptroller * @param interestRateModel_ The address of the interest rate model * @param initialExchangeRateMantissa_ The initial exchange rate, scaled by 1e18 * @param name_ EIP-20 name of this token * @param symbol_ EIP-20 symbol of this token * @param decimals_ EIP-20 decimal precision of this token */ function initialize(ComptrollerInterface comptroller_, InterestRateModel interestRateModel_, uint initialExchangeRateMantissa_, string memory name_, string memory symbol_, uint8 decimals_) public { require(msg.sender == admin, "only admin may initialize the market"); require(accrualBlockNumber == 0 && borrowIndex == 0, "market may only be initialized once"); // Set initial exchange rate initialExchangeRateMantissa = initialExchangeRateMantissa_; require(initialExchangeRateMantissa > 0, "initial exchange rate must be greater than zero."); // Set the comptroller uint err = _setComptroller(comptroller_); require(err == uint(Error.NO_ERROR), "setting comptroller failed"); // Initialize block number and borrow index (block number mocks depend on comptroller being set) accrualBlockNumber = getBlockNumber(); borrowIndex = mantissaOne; // Set the interest rate model (depends on block number / borrow index) err = _setInterestRateModelFresh(interestRateModel_); require(err == uint(Error.NO_ERROR), "setting interest rate model failed"); name = name_; symbol = symbol_; decimals = decimals_; // The counter starts true to prevent changing it from zero to non-zero (i.e. smaller cost/refund) _notEntered = true; } /** * @notice Transfer `tokens` tokens from `src` to `dst` by `spender` * @dev Called by both `transfer` and `transferFrom` internally * @param spender The address of the account performing the transfer * @param src The address of the source account * @param dst The address of the destination account * @param tokens The number of tokens to transfer * @return Whether or not the transfer succeeded */ function transferTokens(address spender, address src, address dst, uint tokens) internal returns (uint) { /* Fail if transfer not allowed */ uint allowed = comptroller.transferAllowed(address(this), src, dst, tokens); if (allowed != 0) { return failOpaque(Error.COMPTROLLER_REJECTION, FailureInfo.TRANSFER_COMPTROLLER_REJECTION, allowed); } /* Do not allow self-transfers */ if (src == dst) { return fail(Error.BAD_INPUT, FailureInfo.TRANSFER_NOT_ALLOWED); } /* Get the allowance, infinite for the account owner */ uint startingAllowance = 0; if (spender == src) { startingAllowance = uint(-1); } else { startingAllowance = transferAllowances[src][spender]; } /* Do the calculations, checking for {under,over}flow */ MathError mathErr; uint allowanceNew; uint srcTokensNew; uint dstTokensNew; (mathErr, allowanceNew) = subUInt(startingAllowance, tokens); if (mathErr != MathError.NO_ERROR) { return fail(Error.MATH_ERROR, FailureInfo.TRANSFER_NOT_ALLOWED); } (mathErr, srcTokensNew) = subUInt(accountTokens[src], tokens); if (mathErr != MathError.NO_ERROR) { return fail(Error.MATH_ERROR, FailureInfo.TRANSFER_NOT_ENOUGH); } (mathErr, dstTokensNew) = addUInt(accountTokens[dst], tokens); if (mathErr != MathError.NO_ERROR) { return fail(Error.MATH_ERROR, FailureInfo.TRANSFER_TOO_MUCH); } ///////////////////////// // EFFECTS & INTERACTIONS // (No safe failures beyond this point) accountTokens[src] = srcTokensNew; accountTokens[dst] = dstTokensNew; /* Eat some of the allowance (if necessary) */ if (startingAllowance != uint(-1)) { transferAllowances[src][spender] = allowanceNew; } /* We emit a Transfer event */ emit Transfer(src, dst, tokens); comptroller.transferVerify(address(this), src, dst, tokens); return uint(Error.NO_ERROR); } /** * @notice Transfer `amount` tokens from `msg.sender` to `dst` * @param dst The address of the destination account * @param amount The number of tokens to transfer * @return Whether or not the transfer succeeded */ function transfer(address dst, uint256 amount) external nonReentrant returns (bool) { return transferTokens(msg.sender, msg.sender, dst, amount) == uint(Error.NO_ERROR); } /** * @notice Transfer `amount` tokens from `src` to `dst` * @param src The address of the source account * @param dst The address of the destination account * @param amount The number of tokens to transfer * @return Whether or not the transfer succeeded */ function transferFrom(address src, address dst, uint256 amount) external nonReentrant returns (bool) { return transferTokens(msg.sender, src, dst, amount) == uint(Error.NO_ERROR); } /** * @notice Approve `spender` to transfer up to `amount` from `src` * @dev This will overwrite the approval amount for `spender` * and is subject to issues noted [here](https://eips.ethereum.org/EIPS/eip-20#approve) * @param spender The address of the account which may transfer tokens * @param amount The number of tokens that are approved (-1 means infinite) * @return Whether or not the approval succeeded */ function approve(address spender, uint256 amount) external returns (bool) { address src = msg.sender; transferAllowances[src][spender] = amount; emit Approval(src, spender, amount); return true; } /** * @notice Get the current allowance from `owner` for `spender` * @param owner The address of the account which owns the tokens to be spent * @param spender The address of the account which may transfer tokens * @return The number of tokens allowed to be spent (-1 means infinite) */ function allowance(address owner, address spender) external view returns (uint256) { return transferAllowances[owner][spender]; } /** * @notice Get the token balance of the `owner` * @param owner The address of the account to query * @return The number of tokens owned by `owner` */ function balanceOf(address owner) external view returns (uint256) { return accountTokens[owner]; } /** * @notice Get the underlying balance of the `owner` * @dev This also accrues interest in a transaction * @param owner The address of the account to query * @return The amount of underlying owned by `owner` */ function balanceOfUnderlying(address owner) external returns (uint) { Exp memory exchangeRate = Exp({mantissa: exchangeRateCurrent()}); (MathError mErr, uint balance) = mulScalarTruncate(exchangeRate, accountTokens[owner]); require(mErr == MathError.NO_ERROR, "balance could not be calculated"); return balance; } /** * @notice Get a snapshot of the account's balances, and the cached exchange rate * @dev This is used by comptroller to more efficiently perform liquidity checks. * @param account Address of the account to snapshot * @return (possible error, token balance, borrow balance, exchange rate mantissa) */ function getAccountSnapshot(address account) external view returns (uint, uint, uint, uint) { uint cTokenBalance = accountTokens[account]; uint borrowBalance; uint exchangeRateMantissa; MathError mErr; (mErr, borrowBalance) = borrowBalanceStoredInternal(account); if (mErr != MathError.NO_ERROR) { return (uint(Error.MATH_ERROR), 0, 0, 0); } (mErr, exchangeRateMantissa) = exchangeRateStoredInternal(); if (mErr != MathError.NO_ERROR) { return (uint(Error.MATH_ERROR), 0, 0, 0); } return (uint(Error.NO_ERROR), cTokenBalance, borrowBalance, exchangeRateMantissa); } /** * @dev Function to simply retrieve block number * This exists mainly for inheriting test contracts to stub this result. */ function getBlockNumber() internal view returns (uint) { return block.number; } /** * @notice Returns the current per-block borrow interest rate for this cToken * @return The borrow interest rate per block, scaled by 1e18 */ function borrowRatePerBlock() external view returns (uint) { return interestRateModel.getBorrowRate(getCashPrior(), totalBorrows, totalReserves); } /** * @notice Returns the current per-block supply interest rate for this cToken * @return The supply interest rate per block, scaled by 1e18 */ function supplyRatePerBlock() external view returns (uint) { return interestRateModel.getSupplyRate(getCashPrior(), totalBorrows, totalReserves, reserveFactorMantissa); } /** * @notice Returns the current total borrows plus accrued interest * @return The total borrows with interest */ function totalBorrowsCurrent() external nonReentrant returns (uint) { require(accrueInterest() == uint(Error.NO_ERROR), "accrue interest failed"); return totalBorrows; } /** * @notice Accrue interest to updated borrowIndex and then calculate account's borrow balance using the updated borrowIndex * @param account The address whose balance should be calculated after updating borrowIndex * @return The calculated balance */ function borrowBalanceCurrent(address account) external nonReentrant returns (uint) { require(accrueInterest() == uint(Error.NO_ERROR), "accrue interest failed"); return borrowBalanceStored(account); } /** * @notice Return the borrow balance of account based on stored data * @param account The address whose balance should be calculated * @return The calculated balance */ function borrowBalanceStored(address account) public view returns (uint) { (MathError err, uint result) = borrowBalanceStoredInternal(account); require(err == MathError.NO_ERROR, "borrowBalanceStored: borrowBalanceStoredInternal failed"); return result; } /** * @notice Return the borrow balance of account based on stored data * @param account The address whose balance should be calculated * @return (error code, the calculated balance or 0 if error code is non-zero) */ function borrowBalanceStoredInternal(address account) internal view returns (MathError, uint) { /* Note: we do not assert that the market is up to date */ MathError mathErr; uint principalTimesIndex; uint result; /* Get borrowBalance and borrowIndex */ BorrowSnapshot storage borrowSnapshot = accountBorrows[account]; /* If borrowBalance = 0 then borrowIndex is likely also 0. * Rather than failing the calculation with a division by 0, we immediately return 0 in this case. */ if (borrowSnapshot.principal == 0) { return (MathError.NO_ERROR, 0); } /* Calculate new borrow balance using the interest index: * recentBorrowBalance = borrower.borrowBalance * market.borrowIndex / borrower.borrowIndex */ (mathErr, principalTimesIndex) = mulUInt(borrowSnapshot.principal, borrowIndex); if (mathErr != MathError.NO_ERROR) { return (mathErr, 0); } (mathErr, result) = divUInt(principalTimesIndex, borrowSnapshot.interestIndex); if (mathErr != MathError.NO_ERROR) { return (mathErr, 0); } return (MathError.NO_ERROR, result); } /** * @notice Accrue interest then return the up-to-date exchange rate * @return Calculated exchange rate scaled by 1e18 */ function exchangeRateCurrent() public nonReentrant returns (uint) { require(accrueInterest() == uint(Error.NO_ERROR), "accrue interest failed"); return exchangeRateStored(); } /** * @notice Calculates the exchange rate from the underlying to the CToken * @dev This function does not accrue interest before calculating the exchange rate * @return Calculated exchange rate scaled by 1e18 */ function exchangeRateStored() public view returns (uint) { (MathError err, uint result) = exchangeRateStoredInternal(); require(err == MathError.NO_ERROR, "exchangeRateStored: exchangeRateStoredInternal failed"); return result; } /** * @notice Calculates the exchange rate from the underlying to the CToken * @dev This function does not accrue interest before calculating the exchange rate * @return (error code, calculated exchange rate scaled by 1e18) */ function exchangeRateStoredInternal() internal view returns (MathError, uint) { uint _totalSupply = totalSupply; if (_totalSupply == 0) { /* * If there are no tokens minted: * exchangeRate = initialExchangeRate */ return (MathError.NO_ERROR, initialExchangeRateMantissa); } else { /* * Otherwise: * exchangeRate = (totalCash + totalBorrows - totalReserves) / totalSupply */ uint totalCash = getCashPrior(); uint cashPlusBorrowsMinusReserves; Exp memory exchangeRate; MathError mathErr; (mathErr, cashPlusBorrowsMinusReserves) = addThenSubUInt(totalCash, totalBorrows, totalReserves); if (mathErr != MathError.NO_ERROR) { return (mathErr, 0); } (mathErr, exchangeRate) = getExp(cashPlusBorrowsMinusReserves, _totalSupply); if (mathErr != MathError.NO_ERROR) { return (mathErr, 0); } return (MathError.NO_ERROR, exchangeRate.mantissa); } } /** * @notice Get cash balance of this cToken in the underlying asset * @return The quantity of underlying asset owned by this contract */ function getCash() external view returns (uint) { return getCashPrior(); } /** * @notice Applies accrued interest to total borrows and reserves * @dev This calculates interest accrued from the last checkpointed block * up to the current block and writes new checkpoint to storage. */ function accrueInterest() public returns (uint) { /* Remember the initial block number */ uint currentBlockNumber = getBlockNumber(); uint accrualBlockNumberPrior = accrualBlockNumber; /* Short-circuit accumulating 0 interest */ if (accrualBlockNumberPrior == currentBlockNumber) { return uint(Error.NO_ERROR); } /* Read the previous values out of storage */ uint cashPrior = getCashPrior(); uint borrowsPrior = totalBorrows; uint reservesPrior = totalReserves; uint borrowIndexPrior = borrowIndex; /* Calculate the current borrow interest rate */ uint borrowRateMantissa = interestRateModel.getBorrowRate(cashPrior, borrowsPrior, reservesPrior); require(borrowRateMantissa <= borrowRateMaxMantissa, "borrow rate is absurdly high"); /* Calculate the number of blocks elapsed since the last accrual */ (MathError mathErr, uint blockDelta) = subUInt(currentBlockNumber, accrualBlockNumberPrior); require(mathErr == MathError.NO_ERROR, "could not calculate block delta"); /* * Calculate the interest accumulated into borrows and reserves and the new index: * simpleInterestFactor = borrowRate * blockDelta * interestAccumulated = simpleInterestFactor * totalBorrows * totalBorrowsNew = interestAccumulated + totalBorrows * totalReservesNew = interestAccumulated * reserveFactor + totalReserves * borrowIndexNew = simpleInterestFactor * borrowIndex + borrowIndex */ Exp memory simpleInterestFactor; uint interestAccumulated; uint totalBorrowsNew; uint totalReservesNew; uint borrowIndexNew; (mathErr, simpleInterestFactor) = mulScalar(Exp({mantissa: borrowRateMantissa}), blockDelta); if (mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.ACCRUE_INTEREST_SIMPLE_INTEREST_FACTOR_CALCULATION_FAILED, uint(mathErr)); } (mathErr, interestAccumulated) = mulScalarTruncate(simpleInterestFactor, borrowsPrior); if (mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.ACCRUE_INTEREST_ACCUMULATED_INTEREST_CALCULATION_FAILED, uint(mathErr)); } (mathErr, totalBorrowsNew) = addUInt(interestAccumulated, borrowsPrior); if (mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.ACCRUE_INTEREST_NEW_TOTAL_BORROWS_CALCULATION_FAILED, uint(mathErr)); } (mathErr, totalReservesNew) = mulScalarTruncateAddUInt(Exp({mantissa: reserveFactorMantissa}), interestAccumulated, reservesPrior); if (mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.ACCRUE_INTEREST_NEW_TOTAL_RESERVES_CALCULATION_FAILED, uint(mathErr)); } (mathErr, borrowIndexNew) = mulScalarTruncateAddUInt(simpleInterestFactor, borrowIndexPrior, borrowIndexPrior); if (mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.ACCRUE_INTEREST_NEW_BORROW_INDEX_CALCULATION_FAILED, uint(mathErr)); } ///////////////////////// // EFFECTS & INTERACTIONS // (No safe failures beyond this point) /* We write the previously calculated values into storage */ accrualBlockNumber = currentBlockNumber; borrowIndex = borrowIndexNew; totalBorrows = totalBorrowsNew; totalReserves = totalReservesNew; /* We emit an AccrueInterest event */ emit AccrueInterest(cashPrior, interestAccumulated, borrowIndexNew, totalBorrowsNew); return uint(Error.NO_ERROR); } /** * @notice Sender supplies assets into the market and receives cTokens in exchange * @dev Accrues interest whether or not the operation succeeds, unless reverted * @param mintAmount The amount of the underlying asset to supply * @return (uint, uint) An error code (0=success, otherwise a failure, see ErrorReporter.sol), and the actual mint amount. */ function mintInternal(uint mintAmount) internal nonReentrant returns (uint, uint) { uint error = accrueInterest(); if (error != uint(Error.NO_ERROR)) { // accrueInterest emits logs on errors, but we still want to log the fact that an attempted borrow failed return (fail(Error(error), FailureInfo.MINT_ACCRUE_INTEREST_FAILED), 0); } // mintFresh emits the actual Mint event if successful and logs on errors, so we don't need to return mintFresh(msg.sender, mintAmount); } struct MintLocalVars { Error err; MathError mathErr; uint exchangeRateMantissa; uint mintTokens; uint totalSupplyNew; uint accountTokensNew; uint actualMintAmount; } /** * @notice User supplies assets into the market and receives cTokens in exchange * @dev Assumes interest has already been accrued up to the current block * @param minter The address of the account which is supplying the assets * @param mintAmount The amount of the underlying asset to supply * @return (uint, uint) An error code (0=success, otherwise a failure, see ErrorReporter.sol), and the actual mint amount. */ function mintFresh(address minter, uint mintAmount) internal returns (uint, uint) { /* Fail if mint not allowed */ uint allowed = comptroller.mintAllowed(address(this), minter, mintAmount); if (allowed != 0) { return (failOpaque(Error.COMPTROLLER_REJECTION, FailureInfo.MINT_COMPTROLLER_REJECTION, allowed), 0); } /* Verify market's block number equals current block number */ if (accrualBlockNumber != getBlockNumber()) { return (fail(Error.MARKET_NOT_FRESH, FailureInfo.MINT_FRESHNESS_CHECK), 0); } MintLocalVars memory vars; (vars.mathErr, vars.exchangeRateMantissa) = exchangeRateStoredInternal(); if (vars.mathErr != MathError.NO_ERROR) { return (failOpaque(Error.MATH_ERROR, FailureInfo.MINT_EXCHANGE_RATE_READ_FAILED, uint(vars.mathErr)), 0); } ///////////////////////// // EFFECTS & INTERACTIONS // (No safe failures beyond this point) /* * We call `doTransferIn` for the minter and the mintAmount. * Note: The cToken must handle variations between ERC-20 and ETH underlying. * `doTransferIn` reverts if anything goes wrong, since we can't be sure if * side-effects occurred. The function returns the amount actually transferred, * in case of a fee. On success, the cToken holds an additional `actualMintAmount` * of cash. */ vars.actualMintAmount = doTransferIn(minter, mintAmount); /* * We get the current exchange rate and calculate the number of cTokens to be minted: * mintTokens = actualMintAmount / exchangeRate */ (vars.mathErr, vars.mintTokens) = divScalarByExpTruncate(vars.actualMintAmount, Exp({mantissa: vars.exchangeRateMantissa})); require(vars.mathErr == MathError.NO_ERROR, "MINT_EXCHANGE_CALCULATION_FAILED"); /* * We calculate the new total supply of cTokens and minter token balance, checking for overflow: * totalSupplyNew = totalSupply + mintTokens * accountTokensNew = accountTokens[minter] + mintTokens */ (vars.mathErr, vars.totalSupplyNew) = addUInt(totalSupply, vars.mintTokens); require(vars.mathErr == MathError.NO_ERROR, "MINT_NEW_TOTAL_SUPPLY_CALCULATION_FAILED"); (vars.mathErr, vars.accountTokensNew) = addUInt(accountTokens[minter], vars.mintTokens); require(vars.mathErr == MathError.NO_ERROR, "MINT_NEW_ACCOUNT_BALANCE_CALCULATION_FAILED"); /* We write previously calculated values into storage */ totalSupply = vars.totalSupplyNew; accountTokens[minter] = vars.accountTokensNew; /* We emit a Mint event, and a Transfer event */ emit Mint(minter, vars.actualMintAmount, vars.mintTokens); emit Transfer(address(this), minter, vars.mintTokens); /* We call the defense hook */ comptroller.mintVerify(address(this), minter, vars.actualMintAmount, vars.mintTokens); return (uint(Error.NO_ERROR), vars.actualMintAmount); } /** * @notice Sender redeems cTokens in exchange for the underlying asset * @dev Accrues interest whether or not the operation succeeds, unless reverted * @param redeemTokens The number of cTokens to redeem into underlying * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function redeemInternal(uint redeemTokens) internal nonReentrant returns (uint) { uint error = accrueInterest(); if (error != uint(Error.NO_ERROR)) { // accrueInterest emits logs on errors, but we still want to log the fact that an attempted redeem failed return fail(Error(error), FailureInfo.REDEEM_ACCRUE_INTEREST_FAILED); } // redeemFresh emits redeem-specific logs on errors, so we don't need to return redeemFresh(msg.sender, redeemTokens, 0); } /** * @notice Sender redeems cTokens in exchange for a specified amount of underlying asset * @dev Accrues interest whether or not the operation succeeds, unless reverted * @param redeemAmount The amount of underlying to receive from redeeming cTokens * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function redeemUnderlyingInternal(uint redeemAmount) internal nonReentrant returns (uint) { uint error = accrueInterest(); if (error != uint(Error.NO_ERROR)) { // accrueInterest emits logs on errors, but we still want to log the fact that an attempted redeem failed return fail(Error(error), FailureInfo.REDEEM_ACCRUE_INTEREST_FAILED); } // redeemFresh emits redeem-specific logs on errors, so we don't need to return redeemFresh(msg.sender, 0, redeemAmount); } struct RedeemLocalVars { Error err; MathError mathErr; uint exchangeRateMantissa; uint redeemTokens; uint redeemAmount; uint totalSupplyNew; uint accountTokensNew; } /** * @notice User redeems cTokens in exchange for the underlying asset * @dev Assumes interest has already been accrued up to the current block * @param redeemer The address of the account which is redeeming the tokens * @param redeemTokensIn The number of cTokens to redeem into underlying (only one of redeemTokensIn or redeemAmountIn may be non-zero) * @param redeemAmountIn The number of underlying tokens to receive from redeeming cTokens (only one of redeemTokensIn or redeemAmountIn may be non-zero) * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function redeemFresh(address payable redeemer, uint redeemTokensIn, uint redeemAmountIn) internal returns (uint) { require(redeemTokensIn == 0 || redeemAmountIn == 0, "one of redeemTokensIn or redeemAmountIn must be zero"); RedeemLocalVars memory vars; /* exchangeRate = invoke Exchange Rate Stored() */ (vars.mathErr, vars.exchangeRateMantissa) = exchangeRateStoredInternal(); if (vars.mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.REDEEM_EXCHANGE_RATE_READ_FAILED, uint(vars.mathErr)); } /* If redeemTokensIn > 0: */ if (redeemTokensIn > 0) { /* * We calculate the exchange rate and the amount of underlying to be redeemed: * redeemTokens = redeemTokensIn * redeemAmount = redeemTokensIn x exchangeRateCurrent */ vars.redeemTokens = redeemTokensIn; (vars.mathErr, vars.redeemAmount) = mulScalarTruncate(Exp({mantissa: vars.exchangeRateMantissa}), redeemTokensIn); if (vars.mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.REDEEM_EXCHANGE_TOKENS_CALCULATION_FAILED, uint(vars.mathErr)); } } else { /* * We get the current exchange rate and calculate the amount to be redeemed: * redeemTokens = redeemAmountIn / exchangeRate * redeemAmount = redeemAmountIn */ (vars.mathErr, vars.redeemTokens) = divScalarByExpTruncate(redeemAmountIn, Exp({mantissa: vars.exchangeRateMantissa})); if (vars.mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.REDEEM_EXCHANGE_AMOUNT_CALCULATION_FAILED, uint(vars.mathErr)); } vars.redeemAmount = redeemAmountIn; } /* Fail if redeem not allowed */ uint allowed = comptroller.redeemAllowed(address(this), redeemer, vars.redeemTokens); if (allowed != 0) { return failOpaque(Error.COMPTROLLER_REJECTION, FailureInfo.REDEEM_COMPTROLLER_REJECTION, allowed); } /* Verify market's block number equals current block number */ if (accrualBlockNumber != getBlockNumber()) { return fail(Error.MARKET_NOT_FRESH, FailureInfo.REDEEM_FRESHNESS_CHECK); } /* * We calculate the new total supply and redeemer balance, checking for underflow: * totalSupplyNew = totalSupply - redeemTokens * accountTokensNew = accountTokens[redeemer] - redeemTokens */ (vars.mathErr, vars.totalSupplyNew) = subUInt(totalSupply, vars.redeemTokens); if (vars.mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.REDEEM_NEW_TOTAL_SUPPLY_CALCULATION_FAILED, uint(vars.mathErr)); } (vars.mathErr, vars.accountTokensNew) = subUInt(accountTokens[redeemer], vars.redeemTokens); if (vars.mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.REDEEM_NEW_ACCOUNT_BALANCE_CALCULATION_FAILED, uint(vars.mathErr)); } /* Fail gracefully if protocol has insufficient cash */ if (getCashPrior() < vars.redeemAmount) { return fail(Error.TOKEN_INSUFFICIENT_CASH, FailureInfo.REDEEM_TRANSFER_OUT_NOT_POSSIBLE); } ///////////////////////// // EFFECTS & INTERACTIONS // (No safe failures beyond this point) /* * We invoke doTransferOut for the redeemer and the redeemAmount. * Note: The cToken must handle variations between ERC-20 and ETH underlying. * On success, the cToken has redeemAmount less of cash. * doTransferOut reverts if anything goes wrong, since we can't be sure if side effects occurred. */ doTransferOut(redeemer, vars.redeemAmount); /* We write previously calculated values into storage */ totalSupply = vars.totalSupplyNew; accountTokens[redeemer] = vars.accountTokensNew; /* We emit a Transfer event, and a Redeem event */ emit Transfer(redeemer, address(this), vars.redeemTokens); emit Redeem(redeemer, vars.redeemAmount, vars.redeemTokens); /* We call the defense hook */ comptroller.redeemVerify(address(this), redeemer, vars.redeemAmount, vars.redeemTokens); return uint(Error.NO_ERROR); } /** * @notice Sender borrows assets from the protocol to their own address * @param borrowAmount The amount of the underlying asset to borrow * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function borrowInternal(uint borrowAmount) internal nonReentrant returns (uint) { uint error = accrueInterest(); if (error != uint(Error.NO_ERROR)) { // accrueInterest emits logs on errors, but we still want to log the fact that an attempted borrow failed return fail(Error(error), FailureInfo.BORROW_ACCRUE_INTEREST_FAILED); } // borrowFresh emits borrow-specific logs on errors, so we don't need to return borrowFresh(msg.sender, borrowAmount); } struct BorrowLocalVars { MathError mathErr; uint accountBorrows; uint accountBorrowsNew; uint totalBorrowsNew; } /** * @notice Users borrow assets from the protocol to their own address * @param borrowAmount The amount of the underlying asset to borrow * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function borrowFresh(address payable borrower, uint borrowAmount) internal returns (uint) { /* Fail if borrow not allowed */ uint allowed = comptroller.borrowAllowed(address(this), borrower, borrowAmount); if (allowed != 0) { return failOpaque(Error.COMPTROLLER_REJECTION, FailureInfo.BORROW_COMPTROLLER_REJECTION, allowed); } /* Verify market's block number equals current block number */ if (accrualBlockNumber != getBlockNumber()) { return fail(Error.MARKET_NOT_FRESH, FailureInfo.BORROW_FRESHNESS_CHECK); } /* Fail gracefully if protocol has insufficient underlying cash */ if (getCashPrior() < borrowAmount) { return fail(Error.TOKEN_INSUFFICIENT_CASH, FailureInfo.BORROW_CASH_NOT_AVAILABLE); } BorrowLocalVars memory vars; /* * We calculate the new borrower and total borrow balances, failing on overflow: * accountBorrowsNew = accountBorrows + borrowAmount * totalBorrowsNew = totalBorrows + borrowAmount */ (vars.mathErr, vars.accountBorrows) = borrowBalanceStoredInternal(borrower); if (vars.mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.BORROW_ACCUMULATED_BALANCE_CALCULATION_FAILED, uint(vars.mathErr)); } (vars.mathErr, vars.accountBorrowsNew) = addUInt(vars.accountBorrows, borrowAmount); if (vars.mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.BORROW_NEW_ACCOUNT_BORROW_BALANCE_CALCULATION_FAILED, uint(vars.mathErr)); } (vars.mathErr, vars.totalBorrowsNew) = addUInt(totalBorrows, borrowAmount); if (vars.mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.BORROW_NEW_TOTAL_BALANCE_CALCULATION_FAILED, uint(vars.mathErr)); } ///////////////////////// // EFFECTS & INTERACTIONS // (No safe failures beyond this point) /* * We invoke doTransferOut for the borrower and the borrowAmount. * Note: The cToken must handle variations between ERC-20 and ETH underlying. * On success, the cToken borrowAmount less of cash. * doTransferOut reverts if anything goes wrong, since we can't be sure if side effects occurred. */ doTransferOut(borrower, borrowAmount); /* We write the previously calculated values into storage */ accountBorrows[borrower].principal = vars.accountBorrowsNew; accountBorrows[borrower].interestIndex = borrowIndex; totalBorrows = vars.totalBorrowsNew; /* We emit a Borrow event */ emit Borrow(borrower, borrowAmount, vars.accountBorrowsNew, vars.totalBorrowsNew); /* We call the defense hook */ comptroller.borrowVerify(address(this), borrower, borrowAmount); return uint(Error.NO_ERROR); } /** * @notice Sender repays their own borrow * @param repayAmount The amount to repay * @return (uint, uint) An error code (0=success, otherwise a failure, see ErrorReporter.sol), and the actual repayment amount. */ function repayBorrowInternal(uint repayAmount) internal nonReentrant returns (uint, uint) { uint error = accrueInterest(); if (error != uint(Error.NO_ERROR)) { // accrueInterest emits logs on errors, but we still want to log the fact that an attempted borrow failed return (fail(Error(error), FailureInfo.REPAY_BORROW_ACCRUE_INTEREST_FAILED), 0); } // repayBorrowFresh emits repay-borrow-specific logs on errors, so we don't need to return repayBorrowFresh(msg.sender, msg.sender, repayAmount); } /** * @notice Sender repays a borrow belonging to borrower * @param borrower the account with the debt being payed off * @param repayAmount The amount to repay * @return (uint, uint) An error code (0=success, otherwise a failure, see ErrorReporter.sol), and the actual repayment amount. */ function repayBorrowBehalfInternal(address borrower, uint repayAmount) internal nonReentrant returns (uint, uint) { uint error = accrueInterest(); if (error != uint(Error.NO_ERROR)) { // accrueInterest emits logs on errors, but we still want to log the fact that an attempted borrow failed return (fail(Error(error), FailureInfo.REPAY_BEHALF_ACCRUE_INTEREST_FAILED), 0); } // repayBorrowFresh emits repay-borrow-specific logs on errors, so we don't need to return repayBorrowFresh(msg.sender, borrower, repayAmount); } struct RepayBorrowLocalVars { Error err; MathError mathErr; uint repayAmount; uint borrowerIndex; uint accountBorrows; uint accountBorrowsNew; uint totalBorrowsNew; uint actualRepayAmount; } /** * @notice Borrows are repaid by another user (possibly the borrower). * @param payer the account paying off the borrow * @param borrower the account with the debt being payed off * @param repayAmount the amount of undelrying tokens being returned * @return (uint, uint) An error code (0=success, otherwise a failure, see ErrorReporter.sol), and the actual repayment amount. */ function repayBorrowFresh(address payer, address borrower, uint repayAmount) internal returns (uint, uint) { /* Fail if repayBorrow not allowed */ uint allowed = comptroller.repayBorrowAllowed(address(this), payer, borrower, repayAmount); if (allowed != 0) { return (failOpaque(Error.COMPTROLLER_REJECTION, FailureInfo.REPAY_BORROW_COMPTROLLER_REJECTION, allowed), 0); } /* Verify market's block number equals current block number */ if (accrualBlockNumber != getBlockNumber()) { return (fail(Error.MARKET_NOT_FRESH, FailureInfo.REPAY_BORROW_FRESHNESS_CHECK), 0); } RepayBorrowLocalVars memory vars; /* We remember the original borrowerIndex for verification purposes */ vars.borrowerIndex = accountBorrows[borrower].interestIndex; /* We fetch the amount the borrower owes, with accumulated interest */ (vars.mathErr, vars.accountBorrows) = borrowBalanceStoredInternal(borrower); if (vars.mathErr != MathError.NO_ERROR) { return (failOpaque(Error.MATH_ERROR, FailureInfo.REPAY_BORROW_ACCUMULATED_BALANCE_CALCULATION_FAILED, uint(vars.mathErr)), 0); } /* If repayAmount == -1, repayAmount = accountBorrows */ if (repayAmount == uint(-1)) { vars.repayAmount = vars.accountBorrows; } else { vars.repayAmount = repayAmount; } ///////////////////////// // EFFECTS & INTERACTIONS // (No safe failures beyond this point) /* * We call doTransferIn for the payer and the repayAmount * Note: The cToken must handle variations between ERC-20 and ETH underlying. * On success, the cToken holds an additional repayAmount of cash. * doTransferIn reverts if anything goes wrong, since we can't be sure if side effects occurred. * it returns the amount actually transferred, in case of a fee. */ vars.actualRepayAmount = doTransferIn(payer, vars.repayAmount); /* * We calculate the new borrower and total borrow balances, failing on underflow: * accountBorrowsNew = accountBorrows - actualRepayAmount * totalBorrowsNew = totalBorrows - actualRepayAmount */ (vars.mathErr, vars.accountBorrowsNew) = subUInt(vars.accountBorrows, vars.actualRepayAmount); require(vars.mathErr == MathError.NO_ERROR, "REPAY_BORROW_NEW_ACCOUNT_BORROW_BALANCE_CALCULATION_FAILED"); (vars.mathErr, vars.totalBorrowsNew) = subUInt(totalBorrows, vars.actualRepayAmount); require(vars.mathErr == MathError.NO_ERROR, "REPAY_BORROW_NEW_TOTAL_BALANCE_CALCULATION_FAILED"); /* We write the previously calculated values into storage */ accountBorrows[borrower].principal = vars.accountBorrowsNew; accountBorrows[borrower].interestIndex = borrowIndex; totalBorrows = vars.totalBorrowsNew; /* We emit a RepayBorrow event */ emit RepayBorrow(payer, borrower, vars.actualRepayAmount, vars.accountBorrowsNew, vars.totalBorrowsNew); /* We call the defense hook */ comptroller.repayBorrowVerify(address(this), payer, borrower, vars.actualRepayAmount, vars.borrowerIndex); return (uint(Error.NO_ERROR), vars.actualRepayAmount); } /** * @notice The sender liquidates the borrowers collateral. * The collateral seized is transferred to the liquidator. * @param borrower The borrower of this cToken to be liquidated * @param cTokenCollateral The market in which to seize collateral from the borrower * @param repayAmount The amount of the underlying borrowed asset to repay * @return (uint, uint) An error code (0=success, otherwise a failure, see ErrorReporter.sol), and the actual repayment amount. */ function liquidateBorrowInternal(address borrower, uint repayAmount, CTokenInterface cTokenCollateral) internal nonReentrant returns (uint, uint) { uint error = accrueInterest(); if (error != uint(Error.NO_ERROR)) { // accrueInterest emits logs on errors, but we still want to log the fact that an attempted liquidation failed return (fail(Error(error), FailureInfo.LIQUIDATE_ACCRUE_BORROW_INTEREST_FAILED), 0); } error = cTokenCollateral.accrueInterest(); if (error != uint(Error.NO_ERROR)) { // accrueInterest emits logs on errors, but we still want to log the fact that an attempted liquidation failed return (fail(Error(error), FailureInfo.LIQUIDATE_ACCRUE_COLLATERAL_INTEREST_FAILED), 0); } // liquidateBorrowFresh emits borrow-specific logs on errors, so we don't need to return liquidateBorrowFresh(msg.sender, borrower, repayAmount, cTokenCollateral); } /** * @notice The liquidator liquidates the borrowers collateral. * The collateral seized is transferred to the liquidator. * @param borrower The borrower of this cToken to be liquidated * @param liquidator The address repaying the borrow and seizing collateral * @param cTokenCollateral The market in which to seize collateral from the borrower * @param repayAmount The amount of the underlying borrowed asset to repay * @return (uint, uint) An error code (0=success, otherwise a failure, see ErrorReporter.sol), and the actual repayment amount. */ function liquidateBorrowFresh(address liquidator, address borrower, uint repayAmount, CTokenInterface cTokenCollateral) internal returns (uint, uint) { /* Fail if liquidate not allowed */ uint allowed = comptroller.liquidateBorrowAllowed(address(this), address(cTokenCollateral), liquidator, borrower, repayAmount); if (allowed != 0) { return (failOpaque(Error.COMPTROLLER_REJECTION, FailureInfo.LIQUIDATE_COMPTROLLER_REJECTION, allowed), 0); } /* Verify market's block number equals current block number */ if (accrualBlockNumber != getBlockNumber()) { return (fail(Error.MARKET_NOT_FRESH, FailureInfo.LIQUIDATE_FRESHNESS_CHECK), 0); } /* Verify cTokenCollateral market's block number equals current block number */ if (cTokenCollateral.accrualBlockNumber() != getBlockNumber()) { return (fail(Error.MARKET_NOT_FRESH, FailureInfo.LIQUIDATE_COLLATERAL_FRESHNESS_CHECK), 0); } /* Fail if borrower = liquidator */ if (borrower == liquidator) { return (fail(Error.INVALID_ACCOUNT_PAIR, FailureInfo.LIQUIDATE_LIQUIDATOR_IS_BORROWER), 0); } /* Fail if repayAmount = 0 */ if (repayAmount == 0) { return (fail(Error.INVALID_CLOSE_AMOUNT_REQUESTED, FailureInfo.LIQUIDATE_CLOSE_AMOUNT_IS_ZERO), 0); } /* Fail if repayAmount = -1 */ if (repayAmount == uint(-1)) { return (fail(Error.INVALID_CLOSE_AMOUNT_REQUESTED, FailureInfo.LIQUIDATE_CLOSE_AMOUNT_IS_UINT_MAX), 0); } /* Fail if repayBorrow fails */ (uint repayBorrowError, uint actualRepayAmount) = repayBorrowFresh(liquidator, borrower, repayAmount); if (repayBorrowError != uint(Error.NO_ERROR)) { return (fail(Error(repayBorrowError), FailureInfo.LIQUIDATE_REPAY_BORROW_FRESH_FAILED), 0); } ///////////////////////// // EFFECTS & INTERACTIONS // (No safe failures beyond this point) /* We calculate the number of collateral tokens that will be seized */ (uint amountSeizeError, uint seizeTokens) = comptroller.liquidateCalculateSeizeTokens(address(this), address(cTokenCollateral), actualRepayAmount); require(amountSeizeError == uint(Error.NO_ERROR), "LIQUIDATE_COMPTROLLER_CALCULATE_AMOUNT_SEIZE_FAILED"); /* Revert if borrower collateral token balance < seizeTokens */ require(cTokenCollateral.balanceOf(borrower) >= seizeTokens, "LIQUIDATE_SEIZE_TOO_MUCH"); // If this is also the collateral, run seizeInternal to avoid re-entrancy, otherwise make an external call uint seizeError; if (address(cTokenCollateral) == address(this)) { seizeError = seizeInternal(address(this), liquidator, borrower, seizeTokens); } else { seizeError = cTokenCollateral.seize(liquidator, borrower, seizeTokens); } /* Revert if seize tokens fails (since we cannot be sure of side effects) */ require(seizeError == uint(Error.NO_ERROR), "token seizure failed"); /* We emit a LiquidateBorrow event */ emit LiquidateBorrow(liquidator, borrower, actualRepayAmount, address(cTokenCollateral), seizeTokens); /* We call the defense hook */ comptroller.liquidateBorrowVerify(address(this), address(cTokenCollateral), liquidator, borrower, actualRepayAmount, seizeTokens); return (uint(Error.NO_ERROR), actualRepayAmount); } /** * @notice Transfers collateral tokens (this market) to the liquidator. * @dev Will fail unless called by another cToken during the process of liquidation. * Its absolutely critical to use msg.sender as the borrowed cToken and not a parameter. * @param liquidator The account receiving seized collateral * @param borrower The account having collateral seized * @param seizeTokens The number of cTokens to seize * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function seize(address liquidator, address borrower, uint seizeTokens) external nonReentrant returns (uint) { return seizeInternal(msg.sender, liquidator, borrower, seizeTokens); } /** * @notice Transfers collateral tokens (this market) to the liquidator. * @dev Called only during an in-kind liquidation, or by liquidateBorrow during the liquidation of another CToken. * Its absolutely critical to use msg.sender as the seizer cToken and not a parameter. * @param seizerToken The contract seizing the collateral (i.e. borrowed cToken) * @param liquidator The account receiving seized collateral * @param borrower The account having collateral seized * @param seizeTokens The number of cTokens to seize * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function seizeInternal(address seizerToken, address liquidator, address borrower, uint seizeTokens) internal returns (uint) { /* Fail if seize not allowed */ uint allowed = comptroller.seizeAllowed(address(this), seizerToken, liquidator, borrower, seizeTokens); if (allowed != 0) { return failOpaque(Error.COMPTROLLER_REJECTION, FailureInfo.LIQUIDATE_SEIZE_COMPTROLLER_REJECTION, allowed); } /* Fail if borrower = liquidator */ if (borrower == liquidator) { return fail(Error.INVALID_ACCOUNT_PAIR, FailureInfo.LIQUIDATE_SEIZE_LIQUIDATOR_IS_BORROWER); } MathError mathErr; uint borrowerTokensNew; uint liquidatorTokensNew; /* * We calculate the new borrower and liquidator token balances, failing on underflow/overflow: * borrowerTokensNew = accountTokens[borrower] - seizeTokens * liquidatorTokensNew = accountTokens[liquidator] + seizeTokens */ (mathErr, borrowerTokensNew) = subUInt(accountTokens[borrower], seizeTokens); if (mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.LIQUIDATE_SEIZE_BALANCE_DECREMENT_FAILED, uint(mathErr)); } (mathErr, liquidatorTokensNew) = addUInt(accountTokens[liquidator], seizeTokens); if (mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.LIQUIDATE_SEIZE_BALANCE_INCREMENT_FAILED, uint(mathErr)); } ///////////////////////// // EFFECTS & INTERACTIONS // (No safe failures beyond this point) /* We write the previously calculated values into storage */ accountTokens[borrower] = borrowerTokensNew; accountTokens[liquidator] = liquidatorTokensNew; /* Emit a Transfer event */ emit Transfer(borrower, liquidator, seizeTokens); /* We call the defense hook */ comptroller.seizeVerify(address(this), seizerToken, liquidator, borrower, seizeTokens); return uint(Error.NO_ERROR); } /*** Admin Functions ***/ /** * @notice Begins transfer of admin rights. The newPendingAdmin must call `_acceptAdmin` to finalize the transfer. * @dev Admin function to begin change of admin. The newPendingAdmin must call `_acceptAdmin` to finalize the transfer. * @param newPendingAdmin New pending admin. * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _setPendingAdmin(address payable newPendingAdmin) external returns (uint) { // Check caller = admin if (msg.sender != admin) { return fail(Error.UNAUTHORIZED, FailureInfo.SET_PENDING_ADMIN_OWNER_CHECK); } // Save current value, if any, for inclusion in log address oldPendingAdmin = pendingAdmin; // Store pendingAdmin with value newPendingAdmin pendingAdmin = newPendingAdmin; // Emit NewPendingAdmin(oldPendingAdmin, newPendingAdmin) emit NewPendingAdmin(oldPendingAdmin, newPendingAdmin); return uint(Error.NO_ERROR); } /** * @notice Accepts transfer of admin rights. msg.sender must be pendingAdmin * @dev Admin function for pending admin to accept role and update admin * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _acceptAdmin() external returns (uint) { // Check caller is pendingAdmin and pendingAdmin ≠ address(0) if (msg.sender != pendingAdmin || msg.sender == address(0)) { return fail(Error.UNAUTHORIZED, FailureInfo.ACCEPT_ADMIN_PENDING_ADMIN_CHECK); } // Save current values for inclusion in log address oldAdmin = admin; address oldPendingAdmin = pendingAdmin; // Store admin with value pendingAdmin admin = pendingAdmin; // Clear the pending value pendingAdmin = address(0); emit NewAdmin(oldAdmin, admin); emit NewPendingAdmin(oldPendingAdmin, pendingAdmin); return uint(Error.NO_ERROR); } /** * @notice Sets a new comptroller for the market * @dev Admin function to set a new comptroller * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _setComptroller(ComptrollerInterface newComptroller) public returns (uint) { // Check caller is admin if (msg.sender != admin) { return fail(Error.UNAUTHORIZED, FailureInfo.SET_COMPTROLLER_OWNER_CHECK); } ComptrollerInterface oldComptroller = comptroller; // Ensure invoke comptroller.isComptroller() returns true require(newComptroller.isComptroller(), "marker method returned false"); // Set market's comptroller to newComptroller comptroller = newComptroller; // Emit NewComptroller(oldComptroller, newComptroller) emit NewComptroller(oldComptroller, newComptroller); return uint(Error.NO_ERROR); } /** * @notice accrues interest and sets a new reserve factor for the protocol using _setReserveFactorFresh * @dev Admin function to accrue interest and set a new reserve factor * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _setReserveFactor(uint newReserveFactorMantissa) external nonReentrant returns (uint) { uint error = accrueInterest(); if (error != uint(Error.NO_ERROR)) { // accrueInterest emits logs on errors, but on top of that we want to log the fact that an attempted reserve factor change failed. return fail(Error(error), FailureInfo.SET_RESERVE_FACTOR_ACCRUE_INTEREST_FAILED); } // _setReserveFactorFresh emits reserve-factor-specific logs on errors, so we don't need to. return _setReserveFactorFresh(newReserveFactorMantissa); } /** * @notice Sets a new reserve factor for the protocol (*requires fresh interest accrual) * @dev Admin function to set a new reserve factor * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _setReserveFactorFresh(uint newReserveFactorMantissa) internal returns (uint) { // Check caller is admin if (msg.sender != admin) { return fail(Error.UNAUTHORIZED, FailureInfo.SET_RESERVE_FACTOR_ADMIN_CHECK); } // Verify market's block number equals current block number if (accrualBlockNumber != getBlockNumber()) { return fail(Error.MARKET_NOT_FRESH, FailureInfo.SET_RESERVE_FACTOR_FRESH_CHECK); } // Check newReserveFactor ≤ maxReserveFactor if (newReserveFactorMantissa > reserveFactorMaxMantissa) { return fail(Error.BAD_INPUT, FailureInfo.SET_RESERVE_FACTOR_BOUNDS_CHECK); } uint oldReserveFactorMantissa = reserveFactorMantissa; reserveFactorMantissa = newReserveFactorMantissa; emit NewReserveFactor(oldReserveFactorMantissa, newReserveFactorMantissa); return uint(Error.NO_ERROR); } /** * @notice Accrues interest and reduces reserves by transferring from msg.sender * @param addAmount Amount of addition to reserves * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _addReservesInternal(uint addAmount) internal nonReentrant returns (uint) { uint error = accrueInterest(); if (error != uint(Error.NO_ERROR)) { // accrueInterest emits logs on errors, but on top of that we want to log the fact that an attempted reduce reserves failed. return fail(Error(error), FailureInfo.ADD_RESERVES_ACCRUE_INTEREST_FAILED); } // _addReservesFresh emits reserve-addition-specific logs on errors, so we don't need to. (error, ) = _addReservesFresh(addAmount); return error; } /** * @notice Add reserves by transferring from caller * @dev Requires fresh interest accrual * @param addAmount Amount of addition to reserves * @return (uint, uint) An error code (0=success, otherwise a failure (see ErrorReporter.sol for details)) and the actual amount added, net token fees */ function _addReservesFresh(uint addAmount) internal returns (uint, uint) { // totalReserves + actualAddAmount uint totalReservesNew; uint actualAddAmount; // We fail gracefully unless market's block number equals current block number if (accrualBlockNumber != getBlockNumber()) { return (fail(Error.MARKET_NOT_FRESH, FailureInfo.ADD_RESERVES_FRESH_CHECK), actualAddAmount); } ///////////////////////// // EFFECTS & INTERACTIONS // (No safe failures beyond this point) /* * We call doTransferIn for the caller and the addAmount * Note: The cToken must handle variations between ERC-20 and ETH underlying. * On success, the cToken holds an additional addAmount of cash. * doTransferIn reverts if anything goes wrong, since we can't be sure if side effects occurred. * it returns the amount actually transferred, in case of a fee. */ actualAddAmount = doTransferIn(msg.sender, addAmount); totalReservesNew = totalReserves + actualAddAmount; /* Revert on overflow */ require(totalReservesNew >= totalReserves, "add reserves unexpected overflow"); // Store reserves[n+1] = reserves[n] + actualAddAmount totalReserves = totalReservesNew; /* Emit NewReserves(admin, actualAddAmount, reserves[n+1]) */ emit ReservesAdded(msg.sender, actualAddAmount, totalReservesNew); /* Return (NO_ERROR, actualAddAmount) */ return (uint(Error.NO_ERROR), actualAddAmount); } /** * @notice Accrues interest and reduces reserves by transferring to admin * @param reduceAmount Amount of reduction to reserves * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _reduceReserves(uint reduceAmount) external nonReentrant returns (uint) { uint error = accrueInterest(); if (error != uint(Error.NO_ERROR)) { // accrueInterest emits logs on errors, but on top of that we want to log the fact that an attempted reduce reserves failed. return fail(Error(error), FailureInfo.REDUCE_RESERVES_ACCRUE_INTEREST_FAILED); } // _reduceReservesFresh emits reserve-reduction-specific logs on errors, so we don't need to. return _reduceReservesFresh(reduceAmount); } /** * @notice Reduces reserves by transferring to admin * @dev Requires fresh interest accrual * @param reduceAmount Amount of reduction to reserves * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _reduceReservesFresh(uint reduceAmount) internal returns (uint) { // totalReserves - reduceAmount uint totalReservesNew; // Check caller is admin if (msg.sender != admin) { return fail(Error.UNAUTHORIZED, FailureInfo.REDUCE_RESERVES_ADMIN_CHECK); } // We fail gracefully unless market's block number equals current block number if (accrualBlockNumber != getBlockNumber()) { return fail(Error.MARKET_NOT_FRESH, FailureInfo.REDUCE_RESERVES_FRESH_CHECK); } // Fail gracefully if protocol has insufficient underlying cash if (getCashPrior() < reduceAmount) { return fail(Error.TOKEN_INSUFFICIENT_CASH, FailureInfo.REDUCE_RESERVES_CASH_NOT_AVAILABLE); } // Check reduceAmount ≤ reserves[n] (totalReserves) if (reduceAmount > totalReserves) { return fail(Error.BAD_INPUT, FailureInfo.REDUCE_RESERVES_VALIDATION); } ///////////////////////// // EFFECTS & INTERACTIONS // (No safe failures beyond this point) totalReservesNew = totalReserves - reduceAmount; // We checked reduceAmount <= totalReserves above, so this should never revert. require(totalReservesNew <= totalReserves, "reduce reserves unexpected underflow"); // Store reserves[n+1] = reserves[n] - reduceAmount totalReserves = totalReservesNew; // doTransferOut reverts if anything goes wrong, since we can't be sure if side effects occurred. doTransferOut(admin, reduceAmount); emit ReservesReduced(admin, reduceAmount, totalReservesNew); return uint(Error.NO_ERROR); } /** * @notice accrues interest and updates the interest rate model using _setInterestRateModelFresh * @dev Admin function to accrue interest and update the interest rate model * @param newInterestRateModel the new interest rate model to use * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _setInterestRateModel(InterestRateModel newInterestRateModel) public returns (uint) { uint error = accrueInterest(); if (error != uint(Error.NO_ERROR)) { // accrueInterest emits logs on errors, but on top of that we want to log the fact that an attempted change of interest rate model failed return fail(Error(error), FailureInfo.SET_INTEREST_RATE_MODEL_ACCRUE_INTEREST_FAILED); } // _setInterestRateModelFresh emits interest-rate-model-update-specific logs on errors, so we don't need to. return _setInterestRateModelFresh(newInterestRateModel); } /** * @notice updates the interest rate model (*requires fresh interest accrual) * @dev Admin function to update the interest rate model * @param newInterestRateModel the new interest rate model to use * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _setInterestRateModelFresh(InterestRateModel newInterestRateModel) internal returns (uint) { // Used to store old model for use in the event that is emitted on success InterestRateModel oldInterestRateModel; // Check caller is admin if (msg.sender != admin) { return fail(Error.UNAUTHORIZED, FailureInfo.SET_INTEREST_RATE_MODEL_OWNER_CHECK); } // We fail gracefully unless market's block number equals current block number if (accrualBlockNumber != getBlockNumber()) { return fail(Error.MARKET_NOT_FRESH, FailureInfo.SET_INTEREST_RATE_MODEL_FRESH_CHECK); } // Track the market's current interest rate model oldInterestRateModel = interestRateModel; // Ensure invoke newInterestRateModel.isInterestRateModel() returns true require(newInterestRateModel.isInterestRateModel(), "marker method returned false"); // Set the interest rate model to newInterestRateModel interestRateModel = newInterestRateModel; // Emit NewMarketInterestRateModel(oldInterestRateModel, newInterestRateModel) emit NewMarketInterestRateModel(oldInterestRateModel, newInterestRateModel); return uint(Error.NO_ERROR); } /*** Safe Token ***/ /** * @notice Gets balance of this contract in terms of the underlying * @dev This excludes the value of the current message, if any * @return The quantity of underlying owned by this contract */ function getCashPrior() internal view returns (uint); /** * @dev Performs a transfer in, reverting upon failure. Returns the amount actually transferred to the protocol, in case of a fee. * This may revert due to insufficient balance or insufficient allowance. */ function doTransferIn(address from, uint amount) internal returns (uint); /** * @dev Performs a transfer out, ideally returning an explanatory error code upon failure tather than reverting. * If caller has not called checked protocol's balance, may revert due to insufficient cash held in the contract. * If caller has checked protocol's balance, and verified it is >= amount, this should not revert in normal conditions. */ function doTransferOut(address payable to, uint amount) internal; /*** Reentrancy Guard ***/ /** * @dev Prevents a contract from calling itself, directly or indirectly. */ modifier nonReentrant() { require(_notEntered, "re-entered"); _notEntered = false; _; _notEntered = true; // get a gas-refund post-Istanbul } } contract Comptroller is ComptrollerV3Storage, ComptrollerInterface, ComptrollerErrorReporter, Exponential { /// @notice Emitted when an admin supports a market event MarketListed(CToken cToken); /// @notice Emitted when an account enters a market event MarketEntered(CToken cToken, address account); /// @notice Emitted when an account exits a market event MarketExited(CToken cToken, address account); /// @notice Emitted when close factor is changed by admin event NewCloseFactor(uint oldCloseFactorMantissa, uint newCloseFactorMantissa); /// @notice Emitted when a collateral factor is changed by admin event NewCollateralFactor(CToken cToken, uint oldCollateralFactorMantissa, uint newCollateralFactorMantissa); /// @notice Emitted when liquidation incentive is changed by admin event NewLiquidationIncentive(uint oldLiquidationIncentiveMantissa, uint newLiquidationIncentiveMantissa); /// @notice Emitted when maxAssets is changed by admin event NewMaxAssets(uint oldMaxAssets, uint newMaxAssets); /// @notice Emitted when price oracle is changed event NewPriceOracle(PriceOracle oldPriceOracle, PriceOracle newPriceOracle); /// @notice Emitted when pause guardian is changed event NewPauseGuardian(address oldPauseGuardian, address newPauseGuardian); /// @notice Emitted when an action is paused globally event ActionPaused(string action, bool pauseState); /// @notice Emitted when an action is paused on a market event MarketActionPaused(CToken cToken, string action, bool pauseState); /// @notice Emitted when market comped status is changed event MarketComped(CToken cToken, bool isComped); /// @notice Emitted when COMP rate is changed event NewCompRate(uint oldCompRate, uint newCompRate); /// @notice Emitted when a new COMP speed is calculated for a market event CompSpeedUpdated(CToken indexed cToken, uint newSpeed, uint totalUtility, uint utility); /// @notice Emitted when COMP is distributed to a supplier event DistributedSupplierComp(CToken indexed cToken, address indexed supplier, uint compDelta, uint compSupplyIndex); /// @notice Emitted when COMP is distributed to a borrower event DistributedBorrowerComp(CToken indexed cToken, address indexed borrower, uint compDelta, uint compBorrowIndex); /// @notice The threshold above which the flywheel transfers COMP, in wei //uint public constant compClaimThreshold = 0.001e18; uint public constant compClaimThreshold = 1e18; /// @notice The initial COMP index for a market uint224 public constant compInitialIndex = 1e36; // closeFactorMantissa must be strictly greater than this value uint internal constant closeFactorMinMantissa = 0.05e18; // 0.05 // closeFactorMantissa must not exceed this value uint internal constant closeFactorMaxMantissa = 0.9e18; // 0.9 // No collateralFactorMantissa may exceed this value uint internal constant collateralFactorMaxMantissa = 0.9e18; // 0.9 // liquidationIncentiveMantissa must be no less than this value uint internal constant liquidationIncentiveMinMantissa = 1.0e18; // 1.0 // liquidationIncentiveMantissa must be no greater than this value uint internal constant liquidationIncentiveMaxMantissa = 1.5e18; // 1.5 constructor() public { admin = msg.sender; } /*** Assets You Are In ***/ /** * @notice Returns the assets an account has entered * @param account The address of the account to pull assets for * @return A dynamic list with the assets the account has entered */ function getAssetsIn(address account) external view returns (CToken[] memory) { CToken[] memory assetsIn = accountAssets[account]; return assetsIn; } /** * @notice Returns whether the given account is entered in the given asset * @param account The address of the account to check * @param cToken The cToken to check * @return True if the account is in the asset, otherwise false. */ function checkMembership(address account, CToken cToken) external view returns (bool) { return markets[address(cToken)].accountMembership[account]; } /** * @notice Add assets to be included in account liquidity calculation * @param cTokens The list of addresses of the cToken markets to be enabled * @return Success indicator for whether each corresponding market was entered */ function enterMarkets(address[] memory cTokens) public returns (uint[] memory) { uint len = cTokens.length; uint[] memory results = new uint[](len); for (uint i = 0; i < len; i++) { CToken cToken = CToken(cTokens[i]); results[i] = uint(addToMarketInternal(cToken, msg.sender)); } return results; } /** * @notice Add the market to the borrower's "assets in" for liquidity calculations * @param cToken The market to enter * @param borrower The address of the account to modify * @return Success indicator for whether the market was entered */ function addToMarketInternal(CToken cToken, address borrower) internal returns (Error) { Market storage marketToJoin = markets[address(cToken)]; if (!marketToJoin.isListed) { // market is not listed, cannot join return Error.MARKET_NOT_LISTED; } if (marketToJoin.accountMembership[borrower] == true) { // already joined return Error.NO_ERROR; } if (accountAssets[borrower].length >= maxAssets) { // no space, cannot join return Error.TOO_MANY_ASSETS; } // survived the gauntlet, add to list // NOTE: we store these somewhat redundantly as a significant optimization // this avoids having to iterate through the list for the most common use cases // that is, only when we need to perform liquidity checks // and not whenever we want to check if an account is in a particular market marketToJoin.accountMembership[borrower] = true; accountAssets[borrower].push(cToken); emit MarketEntered(cToken, borrower); return Error.NO_ERROR; } /** * @notice Removes asset from sender's account liquidity calculation * @dev Sender must not have an outstanding borrow balance in the asset, * or be providing necessary collateral for an outstanding borrow. * @param cTokenAddress The address of the asset to be removed * @return Whether or not the account successfully exited the market */ function exitMarket(address cTokenAddress) external returns (uint) { CToken cToken = CToken(cTokenAddress); /* Get sender tokensHeld and amountOwed underlying from the cToken */ (uint oErr, uint tokensHeld, uint amountOwed,) = cToken.getAccountSnapshot(msg.sender); require(oErr == 0, "exitMarket: getAccountSnapshot failed"); // semi-opaque error code /* Fail if the sender has a borrow balance */ if (amountOwed != 0) { return fail(Error.NONZERO_BORROW_BALANCE, FailureInfo.EXIT_MARKET_BALANCE_OWED); } /* Fail if the sender is not permitted to redeem all of their tokens */ uint allowed = redeemAllowedInternal(cTokenAddress, msg.sender, tokensHeld); if (allowed != 0) { return failOpaque(Error.REJECTION, FailureInfo.EXIT_MARKET_REJECTION, allowed); } Market storage marketToExit = markets[address(cToken)]; /* Return true if the sender is not already ‘in’ the market */ if (!marketToExit.accountMembership[msg.sender]) { return uint(Error.NO_ERROR); } /* Set cToken account membership to false */ delete marketToExit.accountMembership[msg.sender]; /* Delete cToken from the account’s list of assets */ // load into memory for faster iteration CToken[] memory userAssetList = accountAssets[msg.sender]; uint len = userAssetList.length; uint assetIndex = len; for (uint i = 0; i < len; i++) { if (userAssetList[i] == cToken) { assetIndex = i; break; } } // We *must* have found the asset in the list or our redundant data structure is broken assert(assetIndex < len); // copy last item in list to location of item to be removed, reduce length by 1 CToken[] storage storedList = accountAssets[msg.sender]; storedList[assetIndex] = storedList[storedList.length - 1]; storedList.length--; emit MarketExited(cToken, msg.sender); return uint(Error.NO_ERROR); } /*** Policy Hooks ***/ /** * @notice Checks if the account should be allowed to mint tokens in the given market * @param cToken The market to verify the mint against * @param minter The account which would get the minted tokens * @param mintAmount The amount of underlying being supplied to the market in exchange for tokens * @return 0 if the mint is allowed, otherwise a semi-opaque error code (See ErrorReporter.sol) */ function mintAllowed(address cToken, address minter, uint mintAmount) external returns (uint) { // Pausing is a very serious situation - we revert to sound the alarms require(!mintGuardianPaused[cToken], "mint is paused"); // Shh - currently unused minter; mintAmount; if (!markets[cToken].isListed) { return uint(Error.MARKET_NOT_LISTED); } // Keep the flywheel moving updateCompSupplyIndex(cToken); distributeSupplierComp(cToken, minter, false); return uint(Error.NO_ERROR); } /** * @notice Validates mint and reverts on rejection. May emit logs. * @param cToken Asset being minted * @param minter The address minting the tokens * @param actualMintAmount The amount of the underlying asset being minted * @param mintTokens The number of tokens being minted */ function mintVerify(address cToken, address minter, uint actualMintAmount, uint mintTokens) external { // Shh - currently unused cToken; minter; actualMintAmount; mintTokens; // Shh - we don't ever want this hook to be marked pure if (false) { maxAssets = maxAssets; } } /** * @notice Checks if the account should be allowed to redeem tokens in the given market * @param cToken The market to verify the redeem against * @param redeemer The account which would redeem the tokens * @param redeemTokens The number of cTokens to exchange for the underlying asset in the market * @return 0 if the redeem is allowed, otherwise a semi-opaque error code (See ErrorReporter.sol) */ function redeemAllowed(address cToken, address redeemer, uint redeemTokens) external returns (uint) { uint allowed = redeemAllowedInternal(cToken, redeemer, redeemTokens); if (allowed != uint(Error.NO_ERROR)) { return allowed; } // Keep the flywheel moving updateCompSupplyIndex(cToken); distributeSupplierComp(cToken, redeemer, false); return uint(Error.NO_ERROR); } function redeemAllowedInternal(address cToken, address redeemer, uint redeemTokens) internal view returns (uint) { if (!markets[cToken].isListed) { return uint(Error.MARKET_NOT_LISTED); } /* If the redeemer is not 'in' the market, then we can bypass the liquidity check */ if (!markets[cToken].accountMembership[redeemer]) { return uint(Error.NO_ERROR); } /* Otherwise, perform a hypothetical liquidity check to guard against shortfall */ (Error err, , uint shortfall) = getHypotheticalAccountLiquidityInternal(redeemer, CToken(cToken), redeemTokens, 0); if (err != Error.NO_ERROR) { return uint(err); } if (shortfall > 0) { return uint(Error.INSUFFICIENT_LIQUIDITY); } return uint(Error.NO_ERROR); } /** * @notice Validates redeem and reverts on rejection. May emit logs. * @param cToken Asset being redeemed * @param redeemer The address redeeming the tokens * @param redeemAmount The amount of the underlying asset being redeemed * @param redeemTokens The number of tokens being redeemed */ function redeemVerify(address cToken, address redeemer, uint redeemAmount, uint redeemTokens) external { // Shh - currently unused cToken; redeemer; // Require tokens is zero or amount is also zero if (redeemTokens == 0 && redeemAmount > 0) { revert("redeemTokens zero"); } } /** * @notice Checks if the account should be allowed to borrow the underlying asset of the given market * @param cToken The market to verify the borrow against * @param borrower The account which would borrow the asset * @param borrowAmount The amount of underlying the account would borrow * @return 0 if the borrow is allowed, otherwise a semi-opaque error code (See ErrorReporter.sol) */ function borrowAllowed(address cToken, address borrower, uint borrowAmount) external returns (uint) { // Pausing is a very serious situation - we revert to sound the alarms require(!borrowGuardianPaused[cToken], "borrow is paused"); if (!markets[cToken].isListed) { return uint(Error.MARKET_NOT_LISTED); } if (!markets[cToken].accountMembership[borrower]) { // only cTokens may call borrowAllowed if borrower not in market require(msg.sender == cToken, "sender must be cToken"); // attempt to add borrower to the market Error err = addToMarketInternal(CToken(msg.sender), borrower); if (err != Error.NO_ERROR) { return uint(err); } // it should be impossible to break the important invariant assert(markets[cToken].accountMembership[borrower]); } if (oracle.getUnderlyingPrice(CToken(cToken)) == 0) { return uint(Error.PRICE_ERROR); } (Error err, , uint shortfall) = getHypotheticalAccountLiquidityInternal(borrower, CToken(cToken), 0, borrowAmount); if (err != Error.NO_ERROR) { return uint(err); } if (shortfall > 0) { return uint(Error.INSUFFICIENT_LIQUIDITY); } // Keep the flywheel moving Exp memory borrowIndex = Exp({mantissa : CToken(cToken).borrowIndex()}); updateCompBorrowIndex(cToken, borrowIndex); distributeBorrowerComp(cToken, borrower, borrowIndex, false); return uint(Error.NO_ERROR); } /** * @notice Validates borrow and reverts on rejection. May emit logs. * @param cToken Asset whose underlying is being borrowed * @param borrower The address borrowing the underlying * @param borrowAmount The amount of the underlying asset requested to borrow */ function borrowVerify(address cToken, address borrower, uint borrowAmount) external { // Shh - currently unused cToken; borrower; borrowAmount; // Shh - we don't ever want this hook to be marked pure if (false) { maxAssets = maxAssets; } } /** * @notice Checks if the account should be allowed to repay a borrow in the given market * @param cToken The market to verify the repay against * @param payer The account which would repay the asset * @param borrower The account which would borrowed the asset * @param repayAmount The amount of the underlying asset the account would repay * @return 0 if the repay is allowed, otherwise a semi-opaque error code (See ErrorReporter.sol) */ function repayBorrowAllowed( address cToken, address payer, address borrower, uint repayAmount) external returns (uint) { // Shh - currently unused payer; borrower; repayAmount; if (!markets[cToken].isListed) { return uint(Error.MARKET_NOT_LISTED); } // Keep the flywheel moving Exp memory borrowIndex = Exp({mantissa : CToken(cToken).borrowIndex()}); updateCompBorrowIndex(cToken, borrowIndex); distributeBorrowerComp(cToken, borrower, borrowIndex, false); return uint(Error.NO_ERROR); } /** * @notice Validates repayBorrow and reverts on rejection. May emit logs. * @param cToken Asset being repaid * @param payer The address repaying the borrow * @param borrower The address of the borrower * @param actualRepayAmount The amount of underlying being repaid */ function repayBorrowVerify( address cToken, address payer, address borrower, uint actualRepayAmount, uint borrowerIndex) external { // Shh - currently unused cToken; payer; borrower; actualRepayAmount; borrowerIndex; // Shh - we don't ever want this hook to be marked pure if (false) { maxAssets = maxAssets; } } /** * @notice Checks if the liquidation should be allowed to occur * @param cTokenBorrowed Asset which was borrowed by the borrower * @param cTokenCollateral Asset which was used as collateral and will be seized * @param liquidator The address repaying the borrow and seizing the collateral * @param borrower The address of the borrower * @param repayAmount The amount of underlying being repaid */ function liquidateBorrowAllowed( address cTokenBorrowed, address cTokenCollateral, address liquidator, address borrower, uint repayAmount) external returns (uint) { // Shh - currently unused liquidator; if (!markets[cTokenBorrowed].isListed || !markets[cTokenCollateral].isListed) { return uint(Error.MARKET_NOT_LISTED); } /* The borrower must have shortfall in order to be liquidatable */ (Error err, , uint shortfall) = getAccountLiquidityInternal(borrower); if (err != Error.NO_ERROR) { return uint(err); } if (shortfall == 0) { return uint(Error.INSUFFICIENT_SHORTFALL); } /* The liquidator may not repay more than what is allowed by the closeFactor */ uint borrowBalance = CToken(cTokenBorrowed).borrowBalanceStored(borrower); (MathError mathErr, uint maxClose) = mulScalarTruncate(Exp({mantissa : closeFactorMantissa}), borrowBalance); if (mathErr != MathError.NO_ERROR) { return uint(Error.MATH_ERROR); } if (repayAmount > maxClose) { return uint(Error.TOO_MUCH_REPAY); } return uint(Error.NO_ERROR); } /** * @notice Validates liquidateBorrow and reverts on rejection. May emit logs. * @param cTokenBorrowed Asset which was borrowed by the borrower * @param cTokenCollateral Asset which was used as collateral and will be seized * @param liquidator The address repaying the borrow and seizing the collateral * @param borrower The address of the borrower * @param actualRepayAmount The amount of underlying being repaid */ function liquidateBorrowVerify( address cTokenBorrowed, address cTokenCollateral, address liquidator, address borrower, uint actualRepayAmount, uint seizeTokens) external { // Shh - currently unused cTokenBorrowed; cTokenCollateral; liquidator; borrower; actualRepayAmount; seizeTokens; // Shh - we don't ever want this hook to be marked pure if (false) { maxAssets = maxAssets; } } /** * @notice Checks if the seizing of assets should be allowed to occur * @param cTokenCollateral Asset which was used as collateral and will be seized * @param cTokenBorrowed Asset which was borrowed by the borrower * @param liquidator The address repaying the borrow and seizing the collateral * @param borrower The address of the borrower * @param seizeTokens The number of collateral tokens to seize */ function seizeAllowed( address cTokenCollateral, address cTokenBorrowed, address liquidator, address borrower, uint seizeTokens) external returns (uint) { // Pausing is a very serious situation - we revert to sound the alarms require(!seizeGuardianPaused, "seize is paused"); // Shh - currently unused seizeTokens; if (!markets[cTokenCollateral].isListed || !markets[cTokenBorrowed].isListed) { return uint(Error.MARKET_NOT_LISTED); } if (CToken(cTokenCollateral).comptroller() != CToken(cTokenBorrowed).comptroller()) { return uint(Error.COMPTROLLER_MISMATCH); } // Keep the flywheel moving updateCompSupplyIndex(cTokenCollateral); distributeSupplierComp(cTokenCollateral, borrower, false); distributeSupplierComp(cTokenCollateral, liquidator, false); return uint(Error.NO_ERROR); } /** * @notice Validates seize and reverts on rejection. May emit logs. * @param cTokenCollateral Asset which was used as collateral and will be seized * @param cTokenBorrowed Asset which was borrowed by the borrower * @param liquidator The address repaying the borrow and seizing the collateral * @param borrower The address of the borrower * @param seizeTokens The number of collateral tokens to seize */ function seizeVerify( address cTokenCollateral, address cTokenBorrowed, address liquidator, address borrower, uint seizeTokens) external { // Shh - currently unused cTokenCollateral; cTokenBorrowed; liquidator; borrower; seizeTokens; // Shh - we don't ever want this hook to be marked pure if (false) { maxAssets = maxAssets; } } /** * @notice Checks if the account should be allowed to transfer tokens in the given market * @param cToken The market to verify the transfer against * @param src The account which sources the tokens * @param dst The account which receives the tokens * @param transferTokens The number of cTokens to transfer * @return 0 if the transfer is allowed, otherwise a semi-opaque error code (See ErrorReporter.sol) */ function transferAllowed(address cToken, address src, address dst, uint transferTokens) external returns (uint) { // Pausing is a very serious situation - we revert to sound the alarms require(!transferGuardianPaused, "transfer is paused"); // Currently the only consideration is whether or not // the src is allowed to redeem this many tokens uint allowed = redeemAllowedInternal(cToken, src, transferTokens); if (allowed != uint(Error.NO_ERROR)) { return allowed; } // Keep the flywheel moving updateCompSupplyIndex(cToken); distributeSupplierComp(cToken, src, false); distributeSupplierComp(cToken, dst, false); return uint(Error.NO_ERROR); } /** * @notice Validates transfer and reverts on rejection. May emit logs. * @param cToken Asset being transferred * @param src The account which sources the tokens * @param dst The account which receives the tokens * @param transferTokens The number of cTokens to transfer */ function transferVerify(address cToken, address src, address dst, uint transferTokens) external { // Shh - currently unused cToken; src; dst; transferTokens; // Shh - we don't ever want this hook to be marked pure if (false) { maxAssets = maxAssets; } } /*** Liquidity/Liquidation Calculations ***/ /** * @dev Local vars for avoiding stack-depth limits in calculating account liquidity. * Note that `cTokenBalance` is the number of cTokens the account owns in the market, * whereas `borrowBalance` is the amount of underlying that the account has borrowed. */ struct AccountLiquidityLocalVars { uint sumCollateral; uint sumBorrowPlusEffects; uint cTokenBalance; uint borrowBalance; uint exchangeRateMantissa; uint oraclePriceMantissa; Exp collateralFactor; Exp exchangeRate; Exp oraclePrice; Exp tokensToDenom; } /** * @notice Determine the current account liquidity wrt collateral requirements * @return (possible error code (semi-opaque), account liquidity in excess of collateral requirements, * account shortfall below collateral requirements) */ function getAccountLiquidity(address account) public view returns (uint, uint, uint) { (Error err, uint liquidity, uint shortfall) = getHypotheticalAccountLiquidityInternal(account, CToken(0), 0, 0); return (uint(err), liquidity, shortfall); } /** * @notice Determine the current account liquidity wrt collateral requirements * @return (possible error code, account liquidity in excess of collateral requirements, * account shortfall below collateral requirements) */ function getAccountLiquidityInternal(address account) internal view returns (Error, uint, uint) { return getHypotheticalAccountLiquidityInternal(account, CToken(0), 0, 0); } /** * @notice Determine what the account liquidity would be if the given amounts were redeemed/borrowed * @param cTokenModify The market to hypothetically redeem/borrow in * @param account The account to determine liquidity for * @param redeemTokens The number of tokens to hypothetically redeem * @param borrowAmount The amount of underlying to hypothetically borrow * @return (possible error code (semi-opaque), hypothetical account liquidity in excess of collateral requirements, * hypothetical account shortfall below collateral requirements) */ function getHypotheticalAccountLiquidity( address account, address cTokenModify, uint redeemTokens, uint borrowAmount) public view returns (uint, uint, uint) { (Error err, uint liquidity, uint shortfall) = getHypotheticalAccountLiquidityInternal(account, CToken(cTokenModify), redeemTokens, borrowAmount); return (uint(err), liquidity, shortfall); } /** * @notice Determine what the account liquidity would be if the given amounts were redeemed/borrowed * @param cTokenModify The market to hypothetically redeem/borrow in * @param account The account to determine liquidity for * @param redeemTokens The number of tokens to hypothetically redeem * @param borrowAmount The amount of underlying to hypothetically borrow * @dev Note that we calculate the exchangeRateStored for each collateral cToken using stored data, * without calculating accumulated interest. * @return (possible error code, hypothetical account liquidity in excess of collateral requirements, * hypothetical account shortfall below collateral requirements) */ function getHypotheticalAccountLiquidityInternal( address account, CToken cTokenModify, uint redeemTokens, uint borrowAmount) internal view returns (Error, uint, uint) { AccountLiquidityLocalVars memory vars; // Holds all our calculation results uint oErr; MathError mErr; // For each asset the account is in CToken[] memory assets = accountAssets[account]; for (uint i = 0; i < assets.length; i++) { CToken asset = assets[i]; // Read the balances and exchange rate from the cToken (oErr, vars.cTokenBalance, vars.borrowBalance, vars.exchangeRateMantissa) = asset.getAccountSnapshot(account); if (oErr != 0) {// semi-opaque error code, we assume NO_ERROR == 0 is invariant between upgrades return (Error.SNAPSHOT_ERROR, 0, 0); } vars.collateralFactor = Exp({mantissa : markets[address(asset)].collateralFactorMantissa}); vars.exchangeRate = Exp({mantissa : vars.exchangeRateMantissa}); // Get the normalized price of the asset vars.oraclePriceMantissa = oracle.getUnderlyingPrice(asset); if (vars.oraclePriceMantissa == 0) { return (Error.PRICE_ERROR, 0, 0); } vars.oraclePrice = Exp({mantissa : vars.oraclePriceMantissa}); // Pre-compute a conversion factor from tokens -> ether (normalized price value) (mErr, vars.tokensToDenom) = mulExp3(vars.collateralFactor, vars.exchangeRate, vars.oraclePrice); if (mErr != MathError.NO_ERROR) { return (Error.MATH_ERROR, 0, 0); } // sumCollateral += tokensToDenom * cTokenBalance (mErr, vars.sumCollateral) = mulScalarTruncateAddUInt(vars.tokensToDenom, vars.cTokenBalance, vars.sumCollateral); if (mErr != MathError.NO_ERROR) { return (Error.MATH_ERROR, 0, 0); } // sumBorrowPlusEffects += oraclePrice * borrowBalance (mErr, vars.sumBorrowPlusEffects) = mulScalarTruncateAddUInt(vars.oraclePrice, vars.borrowBalance, vars.sumBorrowPlusEffects); if (mErr != MathError.NO_ERROR) { return (Error.MATH_ERROR, 0, 0); } // Calculate effects of interacting with cTokenModify if (asset == cTokenModify) { // redeem effect // sumBorrowPlusEffects += tokensToDenom * redeemTokens (mErr, vars.sumBorrowPlusEffects) = mulScalarTruncateAddUInt(vars.tokensToDenom, redeemTokens, vars.sumBorrowPlusEffects); if (mErr != MathError.NO_ERROR) { return (Error.MATH_ERROR, 0, 0); } // borrow effect // sumBorrowPlusEffects += oraclePrice * borrowAmount (mErr, vars.sumBorrowPlusEffects) = mulScalarTruncateAddUInt(vars.oraclePrice, borrowAmount, vars.sumBorrowPlusEffects); if (mErr != MathError.NO_ERROR) { return (Error.MATH_ERROR, 0, 0); } } } // These are safe, as the underflow condition is checked first if (vars.sumCollateral > vars.sumBorrowPlusEffects) { return (Error.NO_ERROR, vars.sumCollateral - vars.sumBorrowPlusEffects, 0); } else { return (Error.NO_ERROR, 0, vars.sumBorrowPlusEffects - vars.sumCollateral); } } /** * @notice Calculate number of tokens of collateral asset to seize given an underlying amount * @dev Used in liquidation (called in cToken.liquidateBorrowFresh) * @param cTokenBorrowed The address of the borrowed cToken * @param cTokenCollateral The address of the collateral cToken * @param actualRepayAmount The amount of cTokenBorrowed underlying to convert into cTokenCollateral tokens * @return (errorCode, number of cTokenCollateral tokens to be seized in a liquidation) */ function liquidateCalculateSeizeTokens(address cTokenBorrowed, address cTokenCollateral, uint actualRepayAmount) external view returns (uint, uint) { /* Read oracle prices for borrowed and collateral markets */ uint priceBorrowedMantissa = oracle.getUnderlyingPrice(CToken(cTokenBorrowed)); uint priceCollateralMantissa = oracle.getUnderlyingPrice(CToken(cTokenCollateral)); if (priceBorrowedMantissa == 0 || priceCollateralMantissa == 0) { return (uint(Error.PRICE_ERROR), 0); } /* * Get the exchange rate and calculate the number of collateral tokens to seize: * seizeAmount = actualRepayAmount * liquidationIncentive * priceBorrowed / priceCollateral * seizeTokens = seizeAmount / exchangeRate * = actualRepayAmount * (liquidationIncentive * priceBorrowed) / (priceCollateral * exchangeRate) */ uint exchangeRateMantissa = CToken(cTokenCollateral).exchangeRateStored(); // Note: reverts on error uint seizeTokens; Exp memory numerator; Exp memory denominator; Exp memory ratio; MathError mathErr; (mathErr, numerator) = mulExp(liquidationIncentiveMantissa, priceBorrowedMantissa); if (mathErr != MathError.NO_ERROR) { return (uint(Error.MATH_ERROR), 0); } (mathErr, denominator) = mulExp(priceCollateralMantissa, exchangeRateMantissa); if (mathErr != MathError.NO_ERROR) { return (uint(Error.MATH_ERROR), 0); } (mathErr, ratio) = divExp(numerator, denominator); if (mathErr != MathError.NO_ERROR) { return (uint(Error.MATH_ERROR), 0); } (mathErr, seizeTokens) = mulScalarTruncate(ratio, actualRepayAmount); if (mathErr != MathError.NO_ERROR) { return (uint(Error.MATH_ERROR), 0); } return (uint(Error.NO_ERROR), seizeTokens); } /*** Admin Functions ***/ /** * @notice Sets a new price oracle for the comptroller * @dev Admin function to set a new price oracle * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _setPriceOracle(PriceOracle newOracle) public returns (uint) { // Check caller is admin if (msg.sender != admin) { return fail(Error.UNAUTHORIZED, FailureInfo.SET_PRICE_ORACLE_OWNER_CHECK); } // Track the old oracle for the comptroller PriceOracle oldOracle = oracle; // Set comptroller's oracle to newOracle oracle = newOracle; // Emit NewPriceOracle(oldOracle, newOracle) emit NewPriceOracle(oldOracle, newOracle); return uint(Error.NO_ERROR); } /** * @notice Sets the closeFactor used when liquidating borrows * @dev Admin function to set closeFactor * @param newCloseFactorMantissa New close factor, scaled by 1e18 * @return uint 0=success, otherwise a failure. (See ErrorReporter for details) */ function _setCloseFactor(uint newCloseFactorMantissa) external returns (uint) { // Check caller is admin if (msg.sender != admin) { return fail(Error.UNAUTHORIZED, FailureInfo.SET_CLOSE_FACTOR_OWNER_CHECK); } Exp memory newCloseFactorExp = Exp({mantissa : newCloseFactorMantissa}); Exp memory lowLimit = Exp({mantissa : closeFactorMinMantissa}); if (lessThanOrEqualExp(newCloseFactorExp, lowLimit)) { return fail(Error.INVALID_CLOSE_FACTOR, FailureInfo.SET_CLOSE_FACTOR_VALIDATION); } Exp memory highLimit = Exp({mantissa : closeFactorMaxMantissa}); if (lessThanExp(highLimit, newCloseFactorExp)) { return fail(Error.INVALID_CLOSE_FACTOR, FailureInfo.SET_CLOSE_FACTOR_VALIDATION); } uint oldCloseFactorMantissa = closeFactorMantissa; closeFactorMantissa = newCloseFactorMantissa; emit NewCloseFactor(oldCloseFactorMantissa, closeFactorMantissa); return uint(Error.NO_ERROR); } /** * @notice Sets the collateralFactor for a market * @dev Admin function to set per-market collateralFactor * @param cToken The market to set the factor on * @param newCollateralFactorMantissa The new collateral factor, scaled by 1e18 * @return uint 0=success, otherwise a failure. (See ErrorReporter for details) */ function _setCollateralFactor(CToken cToken, uint newCollateralFactorMantissa) external returns (uint) { // Check caller is admin if (msg.sender != admin) { return fail(Error.UNAUTHORIZED, FailureInfo.SET_COLLATERAL_FACTOR_OWNER_CHECK); } // Verify market is listed Market storage market = markets[address(cToken)]; if (!market.isListed) { return fail(Error.MARKET_NOT_LISTED, FailureInfo.SET_COLLATERAL_FACTOR_NO_EXISTS); } Exp memory newCollateralFactorExp = Exp({mantissa : newCollateralFactorMantissa}); // Check collateral factor <= 0.9 Exp memory highLimit = Exp({mantissa : collateralFactorMaxMantissa}); if (lessThanExp(highLimit, newCollateralFactorExp)) { return fail(Error.INVALID_COLLATERAL_FACTOR, FailureInfo.SET_COLLATERAL_FACTOR_VALIDATION); } // If collateral factor != 0, fail if price == 0 if (newCollateralFactorMantissa != 0 && oracle.getUnderlyingPrice(cToken) == 0) { return fail(Error.PRICE_ERROR, FailureInfo.SET_COLLATERAL_FACTOR_WITHOUT_PRICE); } // Set market's collateral factor to new collateral factor, remember old value uint oldCollateralFactorMantissa = market.collateralFactorMantissa; market.collateralFactorMantissa = newCollateralFactorMantissa; // Emit event with asset, old collateral factor, and new collateral factor emit NewCollateralFactor(cToken, oldCollateralFactorMantissa, newCollateralFactorMantissa); return uint(Error.NO_ERROR); } /** * @notice Sets maxAssets which controls how many markets can be entered * @dev Admin function to set maxAssets * @param newMaxAssets New max assets * @return uint 0=success, otherwise a failure. (See ErrorReporter for details) */ function _setMaxAssets(uint newMaxAssets) external returns (uint) { // Check caller is admin if (msg.sender != admin) { return fail(Error.UNAUTHORIZED, FailureInfo.SET_MAX_ASSETS_OWNER_CHECK); } uint oldMaxAssets = maxAssets; maxAssets = newMaxAssets; emit NewMaxAssets(oldMaxAssets, newMaxAssets); return uint(Error.NO_ERROR); } /** * @notice Sets liquidationIncentive * @dev Admin function to set liquidationIncentive * @param newLiquidationIncentiveMantissa New liquidationIncentive scaled by 1e18 * @return uint 0=success, otherwise a failure. (See ErrorReporter for details) */ function _setLiquidationIncentive(uint newLiquidationIncentiveMantissa) external returns (uint) { // Check caller is admin if (msg.sender != admin) { return fail(Error.UNAUTHORIZED, FailureInfo.SET_LIQUIDATION_INCENTIVE_OWNER_CHECK); } // Check de-scaled min <= newLiquidationIncentive <= max Exp memory newLiquidationIncentive = Exp({mantissa : newLiquidationIncentiveMantissa}); Exp memory minLiquidationIncentive = Exp({mantissa : liquidationIncentiveMinMantissa}); if (lessThanExp(newLiquidationIncentive, minLiquidationIncentive)) { return fail(Error.INVALID_LIQUIDATION_INCENTIVE, FailureInfo.SET_LIQUIDATION_INCENTIVE_VALIDATION); } Exp memory maxLiquidationIncentive = Exp({mantissa : liquidationIncentiveMaxMantissa}); if (lessThanExp(maxLiquidationIncentive, newLiquidationIncentive)) { return fail(Error.INVALID_LIQUIDATION_INCENTIVE, FailureInfo.SET_LIQUIDATION_INCENTIVE_VALIDATION); } // Save current value for use in log uint oldLiquidationIncentiveMantissa = liquidationIncentiveMantissa; // Set liquidation incentive to new incentive liquidationIncentiveMantissa = newLiquidationIncentiveMantissa; // Emit event with old incentive, new incentive emit NewLiquidationIncentive(oldLiquidationIncentiveMantissa, newLiquidationIncentiveMantissa); return uint(Error.NO_ERROR); } /** * @notice Add the market to the markets mapping and set it as listed * @dev Admin function to set isListed and add support for the market * @param cToken The address of the market (token) to list * @return uint 0=success, otherwise a failure. (See enum Error for details) */ function _supportMarket(CToken cToken) external returns (uint) { if (msg.sender != admin) { return fail(Error.UNAUTHORIZED, FailureInfo.SUPPORT_MARKET_OWNER_CHECK); } if (markets[address(cToken)].isListed) { return fail(Error.MARKET_ALREADY_LISTED, FailureInfo.SUPPORT_MARKET_EXISTS); } cToken.isCToken(); // Sanity check to make sure its really a CToken markets[address(cToken)] = Market({isListed : true, isComped : true, collateralFactorMantissa : 0}); _addMarketInternal(address(cToken)); borrowGuardianPaused[address(cToken)] = true; //stage 1, not allow borrow emit MarketListed(cToken); return uint(Error.NO_ERROR); } function _addMarketInternal(address cToken) internal { for (uint i = 0; i < allMarkets.length; i ++) { require(allMarkets[i] != CToken(cToken), "market already added"); } allMarkets.push(CToken(cToken)); } /** * @notice Admin function to change the Pause Guardian * @param newPauseGuardian The address of the new Pause Guardian * @return uint 0=success, otherwise a failure. (See enum Error for details) */ function _setPauseGuardian(address newPauseGuardian) public returns (uint) { if (msg.sender != admin) { return fail(Error.UNAUTHORIZED, FailureInfo.SET_PAUSE_GUARDIAN_OWNER_CHECK); } // Save current value for inclusion in log address oldPauseGuardian = pauseGuardian; // Store pauseGuardian with value newPauseGuardian pauseGuardian = newPauseGuardian; // Emit NewPauseGuardian(OldPauseGuardian, NewPauseGuardian) emit NewPauseGuardian(oldPauseGuardian, pauseGuardian); return uint(Error.NO_ERROR); } function _setMintPaused(CToken cToken, bool state) public returns (bool) { require(markets[address(cToken)].isListed, "cannot pause a market that is not listed"); require(msg.sender == pauseGuardian || msg.sender == admin, "only pause guardian and admin can pause"); require(msg.sender == admin || state == true, "only admin can unpause"); mintGuardianPaused[address(cToken)] = state; emit MarketActionPaused(cToken, "Mint", state); return state; } function _setBorrowPaused(CToken cToken, bool state) public returns (bool) { require(markets[address(cToken)].isListed, "cannot pause a market that is not listed"); require(msg.sender == pauseGuardian || msg.sender == admin, "only pause guardian and admin can pause"); require(msg.sender == admin || state == true, "only admin can unpause"); borrowGuardianPaused[address(cToken)] = state; emit MarketActionPaused(cToken, "Borrow", state); return state; } function _setTransferPaused(bool state) public returns (bool) { require(msg.sender == pauseGuardian || msg.sender == admin, "only pause guardian and admin can pause"); require(msg.sender == admin || state == true, "only admin can unpause"); transferGuardianPaused = state; emit ActionPaused("Transfer", state); return state; } function _setSeizePaused(bool state) public returns (bool) { require(msg.sender == pauseGuardian || msg.sender == admin, "only pause guardian and admin can pause"); require(msg.sender == admin || state == true, "only admin can unpause"); seizeGuardianPaused = state; emit ActionPaused("Seize", state); return state; } function _become(Unitroller unitroller) public { require(msg.sender == unitroller.admin(), "only unitroller admin can change brains"); require(unitroller._acceptImplementation() == 0, "change not authorized"); } /** * @notice Checks caller is admin, or this contract is becoming the new implementation */ function adminOrInitializing() internal view returns (bool) { return msg.sender == admin || msg.sender == comptrollerImplementation; } /*** Comp Distribution ***/ /** * @notice Recalculate and update COMP speeds for all COMP markets */ function refreshCompSpeeds() public { require(msg.sender == tx.origin, "only externally owned accounts may refresh speeds"); refreshCompSpeedsInternal(); } function refreshCompSpeedsInternal() internal { CToken[] memory allMarkets_ = allMarkets; for (uint i = 0; i < allMarkets_.length; i++) { CToken cToken = allMarkets_[i]; Exp memory borrowIndex = Exp({mantissa : cToken.borrowIndex()}); updateCompSupplyIndex(address(cToken)); updateCompBorrowIndex(address(cToken), borrowIndex); } Exp memory borrowTotalUtility = Exp({mantissa : 0}); uint borrowAssetCount = 0; Exp memory borrowAverageUtility = Exp({mantissa : 0}); //calculate Borrow asset totalUtility if (miningRule == 1) {//mining by borrow for (uint i = 0; i < allMarkets_.length; i++) { CToken cToken = allMarkets_[i]; if (markets[address(cToken)].isComped && !borrowGuardianPaused[address(cToken)]) { Exp memory assetPrice = Exp({mantissa : oracle.getUnderlyingPrice(cToken)}); Exp memory utility = mul_(assetPrice, cToken.totalBorrows()); borrowTotalUtility = add_(borrowTotalUtility, utility); borrowAssetCount++; } } if (borrowAssetCount > 0) { borrowAverageUtility = div_(borrowTotalUtility, borrowAssetCount); } } Exp memory totalUtility = Exp({mantissa : 0}); Exp[] memory utilities = new Exp[](allMarkets_.length); for (uint i = 0; i < allMarkets_.length; i++) { CToken cToken = allMarkets_[i]; if (markets[address(cToken)].isComped) { Exp memory utility; uint buff = miningBuff[address(cToken)]; Exp memory price = Exp({mantissa : oracle.getUnderlyingPrice(cToken)}); if (buff == 0) buff = 1; if (miningRule == 0) {//mining by supply //supply * exchange rate = asset balance Exp memory supply = Exp({mantissa: cToken.totalSupply()}); //Exp memory exchangeRate = Exp({mantissa: cToken.exchangeRateStored()}); uint assetBalance = mul_(cToken.exchangeRateStored(), supply); // div e18 //usd price * balance = utility Exp memory realUtility = Exp({mantissa: mul_(assetBalance, price.mantissa)}); utility = mul_(realUtility, buff); //buff } else if (miningRule == 1) {//mining by borrow if (borrowGuardianPaused[address(cToken)]) { //averageUtility with in price utility = mul_(borrowAverageUtility, buff); } else { Exp memory realUtility = mul_(price, cToken.totalBorrows()); utility = mul_(realUtility, buff); } } else {//can't support revert(); } utilities[i] = utility; totalUtility = add_(totalUtility, utility); } } for (uint i = 0; i < allMarkets_.length; i++) { CToken cToken = allMarkets[i]; uint newSpeed = totalUtility.mantissa > 0 ? mul_(compRate, div_(utilities[i], totalUtility)) : 0; compSpeeds[address(cToken)] = newSpeed; emit CompSpeedUpdated(cToken, newSpeed, totalUtility.mantissa, utilities[i].mantissa); } } /** * @notice Accrue COMP to the market by updating the supply index * @param cToken The market whose supply index to update */ function updateCompSupplyIndex(address cToken) internal { CompMarketState storage supplyState = compSupplyState[cToken]; uint supplySpeed = compSpeeds[cToken]; uint blockNumber = getBlockNumber(); uint deltaBlocks = sub_(blockNumber, uint(supplyState.block)); if (deltaBlocks > 0 && supplySpeed > 0) { uint supplyTokens = CToken(cToken).totalSupply(); uint compAccrued = mul_(deltaBlocks, supplySpeed); Double memory ratio = supplyTokens > 0 ? fraction(compAccrued, supplyTokens) : Double({mantissa : 0}); Double memory index = add_(Double({mantissa : supplyState.index}), ratio); compSupplyState[cToken] = CompMarketState({ index : safe224(index.mantissa, "new index exceeds 224 bits"), block : safe32(blockNumber, "block number exceeds 32 bits") }); } else if (deltaBlocks > 0) { supplyState.block = safe32(blockNumber, "block number exceeds 32 bits"); } } /** * @notice Accrue COMP to the market by updating the borrow index * @param cToken The market whose borrow index to update */ function updateCompBorrowIndex(address cToken, Exp memory marketBorrowIndex) internal { CompMarketState storage borrowState = compBorrowState[cToken]; uint borrowSpeed = compSpeeds[cToken]; uint blockNumber = getBlockNumber(); uint deltaBlocks = sub_(blockNumber, uint(borrowState.block)); if (deltaBlocks > 0 && borrowSpeed > 0) { uint borrowAmount = div_(CToken(cToken).totalBorrows(), marketBorrowIndex); uint compAccrued = mul_(deltaBlocks, borrowSpeed); Double memory ratio = borrowAmount > 0 ? fraction(compAccrued, borrowAmount) : Double({mantissa : 0}); Double memory index = add_(Double({mantissa : borrowState.index}), ratio); compBorrowState[cToken] = CompMarketState({ index : safe224(index.mantissa, "new index exceeds 224 bits"), block : safe32(blockNumber, "block number exceeds 32 bits") }); } else if (deltaBlocks > 0) { borrowState.block = safe32(blockNumber, "block number exceeds 32 bits"); } } /** * @notice Calculate COMP accrued by a supplier and possibly transfer it to them * @param cToken The market in which the supplier is interacting * @param supplier The address of the supplier to distribute COMP to */ function distributeSupplierComp(address cToken, address supplier, bool distributeAll) internal { CompMarketState storage supplyState = compSupplyState[cToken]; Double memory supplyIndex = Double({mantissa : supplyState.index}); Double memory supplierIndex = Double({mantissa : compSupplierIndex[cToken][supplier]}); compSupplierIndex[cToken][supplier] = supplyIndex.mantissa; if (supplierIndex.mantissa == 0 && supplyIndex.mantissa > 0) { supplierIndex.mantissa = compInitialIndex; } Double memory deltaIndex = sub_(supplyIndex, supplierIndex); uint supplierTokens = CToken(cToken).balanceOf(supplier); uint supplierDelta = mul_(supplierTokens, deltaIndex); uint supplierAccrued = add_(compAccrued[supplier], supplierDelta); compAccrued[supplier] = transferComp(supplier, supplierAccrued, distributeAll ? 0 : compClaimThreshold); emit DistributedSupplierComp(CToken(cToken), supplier, supplierDelta, supplyIndex.mantissa); } /** * @notice Calculate COMP accrued by a borrower and possibly transfer it to them * @dev Borrowers will not begin to accrue until after the first interaction with the protocol. * @param cToken The market in which the borrower is interacting * @param borrower The address of the borrower to distribute COMP to */ function distributeBorrowerComp(address cToken, address borrower, Exp memory marketBorrowIndex, bool distributeAll) internal { CompMarketState storage borrowState = compBorrowState[cToken]; Double memory borrowIndex = Double({mantissa : borrowState.index}); Double memory borrowerIndex = Double({mantissa : compBorrowerIndex[cToken][borrower]}); compBorrowerIndex[cToken][borrower] = borrowIndex.mantissa; if (borrowerIndex.mantissa > 0) { Double memory deltaIndex = sub_(borrowIndex, borrowerIndex); uint borrowerAmount = div_(CToken(cToken).borrowBalanceStored(borrower), marketBorrowIndex); uint borrowerDelta = mul_(borrowerAmount, deltaIndex); uint borrowerAccrued = add_(compAccrued[borrower], borrowerDelta); compAccrued[borrower] = transferComp(borrower, borrowerAccrued, distributeAll ? 0 : compClaimThreshold); emit DistributedBorrowerComp(CToken(cToken), borrower, borrowerDelta, borrowIndex.mantissa); } } /** * @notice Transfer COMP to the user, if they are above the threshold * @dev Note: If there is not enough COMP, we do not perform the transfer all. * @param user The address of the user to transfer COMP to * @param userAccrued The amount of COMP to (possibly) transfer * @return The amount of COMP which was NOT transferred to the user */ function transferComp(address user, uint userAccrued, uint threshold) internal returns (uint) { if (userAccrued >= threshold && userAccrued > 0) { Cheese cheese = Cheese(getCheeseAddress()); uint cheeseRemaining = cheese.balanceOf(address(this)); if (userAccrued <= cheeseRemaining) { cheese.transfer(user, userAccrued); return 0; } } return userAccrued; } /** * @notice Claim all the comp accrued by holder in all markets * @param holder The address to claim COMP for */ function claimComp(address holder) public { return claimComp(holder, allMarkets); } /** * @notice Claim all the comp accrued by holder in the specified markets * @param holder The address to claim COMP for * @param cTokens The list of markets to claim COMP in */ function claimComp(address holder, CToken[] memory cTokens) public { address[] memory holders = new address[](1); holders[0] = holder; claimComp(holders, cTokens, true, true); } /** * @notice Claim all comp accrued by the holders * @param holders The addresses to claim COMP for * @param cTokens The list of markets to claim COMP in * @param borrowers Whether or not to claim COMP earned by borrowing * @param suppliers Whether or not to claim COMP earned by supplying */ function claimComp(address[] memory holders, CToken[] memory cTokens, bool borrowers, bool suppliers) public { for (uint i = 0; i < cTokens.length; i++) { CToken cToken = cTokens[i]; require(markets[address(cToken)].isListed, "market must be listed"); if (borrowers == true) { Exp memory borrowIndex = Exp({mantissa : cToken.borrowIndex()}); updateCompBorrowIndex(address(cToken), borrowIndex); for (uint j = 0; j < holders.length; j++) { distributeBorrowerComp(address(cToken), holders[j], borrowIndex, true); } } if (suppliers == true) { updateCompSupplyIndex(address(cToken)); for (uint j = 0; j < holders.length; j++) { distributeSupplierComp(address(cToken), holders[j], true); } } } } /*** Comp Distribution Admin ***/ /** * @notice Set the amount of COMP distributed per block * @param compRate_ The amount of COMP wei per block to distribute */ function _setCompRate(uint compRate_) public { require(adminOrInitializing(), "only admin can change comp rate"); uint oldRate = compRate; compRate = compRate_; emit NewCompRate(oldRate, compRate_); refreshCompSpeedsInternal(); } /** * @notice Add markets to compMarkets, allowing them to earn COMP in the flywheel * @param cTokens The addresses of the markets to add */ function _addCompMarkets(address[] memory cTokens) public { require(adminOrInitializing(), "only admin can add comp market"); for (uint i = 0; i < cTokens.length; i++) { _addCompMarketInternal(cTokens[i]); } refreshCompSpeedsInternal(); } function _addCompMarketInternal(address cToken) internal { Market storage market = markets[cToken]; require(market.isListed == true, "comp market is not listed"); require(market.isComped == false, "comp market already added"); market.isComped = true; emit MarketComped(CToken(cToken), true); if (compSupplyState[cToken].index == 0 && compSupplyState[cToken].block == 0) { compSupplyState[cToken] = CompMarketState({ index : compInitialIndex, block : safe32(getBlockNumber(), "block number exceeds 32 bits") }); } if (compBorrowState[cToken].index == 0 && compBorrowState[cToken].block == 0) { compBorrowState[cToken] = CompMarketState({ index : compInitialIndex, block : safe32(getBlockNumber(), "block number exceeds 32 bits") }); } } /** * @notice Remove a market from compMarkets, preventing it from earning COMP in the flywheel * @param cToken The address of the market to drop */ function _dropCompMarket(address cToken) public { require(msg.sender == admin, "only admin can drop comp market"); Market storage market = markets[cToken]; require(market.isComped == true, "market is not a comp market"); market.isComped = false; emit MarketComped(CToken(cToken), false); refreshCompSpeedsInternal(); } function _setMiningBuff(address cToken, uint buff) public { require(adminOrInitializing(), "only admin can change cheese rate"); miningBuff[cToken] = buff; } function _changeMiningRule() public { if (msg.sender != admin || miningRule != 0) { return; } /* require(adminOrInitializing(), "only admin can set mining rule"); require(miningRule == 0, "only change mining rule from 0 to 1"); */ miningRule = 1; } /** * @notice Return all of the markets * @dev The automatic getter may be used to access an individual market. * @return The list of market addresses */ function getAllMarkets() public view returns (CToken[] memory) { return allMarkets; } function getBlockNumber() public view returns (uint) { return block.number; } /** * @notice Return the address of the COMP token * @return The address of COMP */ function getCheeseAddress() public view returns (address) { return 0x995475c9A46e1595962c389a51804FD198A9AE27; } } contract CErc20 is CToken, CErc20Interface { constructor() public { admin = msg.sender; } /** * @notice Initialize the new money market * @param underlying_ The address of the underlying asset * @param comptroller_ The address of the Comptroller * @param interestRateModel_ The address of the interest rate model * @param initialExchangeRateMantissa_ The initial exchange rate, scaled by 1e18 * @param name_ ERC-20 name of this token * @param symbol_ ERC-20 symbol of this token * @param decimals_ ERC-20 decimal precision of this token */ function initialize(address underlying_, ComptrollerInterface comptroller_, InterestRateModel interestRateModel_, uint initialExchangeRateMantissa_, string memory name_, string memory symbol_, uint8 decimals_) public { // CToken initialize does the bulk of the work super.initialize(comptroller_, interestRateModel_, initialExchangeRateMantissa_, name_, symbol_, decimals_); // Set underlying and sanity check it underlying = underlying_; EIP20Interface(underlying).totalSupply(); } /*** User Interface ***/ /** * @notice Sender supplies assets into the market and receives cTokens in exchange * @dev Accrues interest whether or not the operation succeeds, unless reverted * @param mintAmount The amount of the underlying asset to supply * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function mint(uint mintAmount) external returns (uint) { (uint err,) = mintInternal(mintAmount); return err; } /** * @notice Sender redeems cTokens in exchange for the underlying asset * @dev Accrues interest whether or not the operation succeeds, unless reverted * @param redeemTokens The number of cTokens to redeem into underlying * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function redeem(uint redeemTokens) external returns (uint) { return redeemInternal(redeemTokens); } /** * @notice Sender redeems cTokens in exchange for a specified amount of underlying asset * @dev Accrues interest whether or not the operation succeeds, unless reverted * @param redeemAmount The amount of underlying to redeem * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function redeemUnderlying(uint redeemAmount) external returns (uint) { return redeemUnderlyingInternal(redeemAmount); } /** * @notice Sender borrows assets from the protocol to their own address * @param borrowAmount The amount of the underlying asset to borrow * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function borrow(uint borrowAmount) external returns (uint) { return borrowInternal(borrowAmount); } /** * @notice Sender repays their own borrow * @param repayAmount The amount to repay * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function repayBorrow(uint repayAmount) external returns (uint) { (uint err,) = repayBorrowInternal(repayAmount); return err; } /** * @notice Sender repays a borrow belonging to borrower * @param borrower the account with the debt being payed off * @param repayAmount The amount to repay * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function repayBorrowBehalf(address borrower, uint repayAmount) external returns (uint) { (uint err,) = repayBorrowBehalfInternal(borrower, repayAmount); return err; } /** * @notice The sender liquidates the borrowers collateral. * The collateral seized is transferred to the liquidator. * @param borrower The borrower of this cToken to be liquidated * @param repayAmount The amount of the underlying borrowed asset to repay * @param cTokenCollateral The market in which to seize collateral from the borrower * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function liquidateBorrow(address borrower, uint repayAmount, CTokenInterface cTokenCollateral) external returns (uint) { (uint err,) = liquidateBorrowInternal(borrower, repayAmount, cTokenCollateral); return err; } /** * @notice The sender adds to reserves. * @param addAmount The amount fo underlying token to add as reserves * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _addReserves(uint addAmount) external returns (uint) { return _addReservesInternal(addAmount); } /*** Safe Token ***/ /** * @notice Gets balance of this contract in terms of the underlying * @dev This excludes the value of the current message, if any * @return The quantity of underlying tokens owned by this contract */ function getCashPrior() internal view returns (uint) { EIP20Interface token = EIP20Interface(underlying); return token.balanceOf(address(this)); } /** * @dev Similar to EIP20 transfer, except it handles a False result from `transferFrom` and reverts in that case. * This will revert due to insufficient balance or insufficient allowance. * This function returns the actual amount received, * which may be less than `amount` if there is a fee attached to the transfer. * * Note: This wrapper safely handles non-standard ERC-20 tokens that do not return a value. * See here: https://medium.com/coinmonks/missing-return-value-bug-at-least-130-tokens-affected-d67bf08521ca */ function doTransferIn(address from, uint amount) internal returns (uint) { EIP20NonStandardInterface token = EIP20NonStandardInterface(underlying); uint balanceBefore = EIP20Interface(underlying).balanceOf(address(this)); token.transferFrom(from, address(this), amount); bool success; assembly { switch returndatasize() case 0 { // This is a non-standard ERC-20 success := not(0) // set success to true } case 32 { // This is a compliant ERC-20 returndatacopy(0, 0, 32) success := mload(0) // Set `success = returndata` of external call } default { // This is an excessively non-compliant ERC-20, revert. revert(0, 0) } } require(success, "TOKEN_TRANSFER_IN_FAILED"); // Calculate the amount that was *actually* transferred uint balanceAfter = EIP20Interface(underlying).balanceOf(address(this)); require(balanceAfter >= balanceBefore, "TOKEN_TRANSFER_IN_OVERFLOW"); return balanceAfter - balanceBefore; // underflow already checked above, just subtract } /** * @dev Similar to EIP20 transfer, except it handles a False success from `transfer` and returns an explanatory * error code rather than reverting. If caller has not called checked protocol's balance, this may revert due to * insufficient cash held in this contract. If caller has checked protocol's balance prior to this call, and verified * it is >= amount, this should not revert in normal conditions. * * Note: This wrapper safely handles non-standard ERC-20 tokens that do not return a value. * See here: https://medium.com/coinmonks/missing-return-value-bug-at-least-130-tokens-affected-d67bf08521ca */ function doTransferOut(address payable to, uint amount) internal { EIP20NonStandardInterface token = EIP20NonStandardInterface(underlying); token.transfer(to, amount); bool success; assembly { switch returndatasize() case 0 { // This is a non-standard ERC-20 success := not(0) // set success to true } case 32 { // This is a complaint ERC-20 returndatacopy(0, 0, 32) success := mload(0) // Set `success = returndata` of external call } default { // This is an excessively non-compliant ERC-20, revert. revert(0, 0) } } require(success, "TOKEN_TRANSFER_OUT_FAILED"); } } contract CErc20Delegate is CErc20, CDelegateInterface { /** * @notice Construct an empty delegate */ constructor() public {} /** * @notice Called by the delegator on a delegate to initialize it for duty * @param data The encoded bytes data for any initialization */ function _becomeImplementation(bytes memory data) public { // Shh -- currently unused data; // Shh -- we don't ever want this hook to be marked pure if (false) { implementation = address(0); } require(msg.sender == admin, "only the admin may call _becomeImplementation"); } /** * @notice Called by the delegator on a delegate to forfeit its responsibility */ function _resignImplementation() public { // Shh -- we don't ever want this hook to be marked pure if (false) { implementation = address(0); } require(msg.sender == admin, "only the admin may call _resignImplementation"); } } contract CErc20Immutable is CErc20 { /** * @notice Construct a new money market * @param underlying_ The address of the underlying asset * @param comptroller_ The address of the Comptroller * @param interestRateModel_ The address of the interest rate model * @param initialExchangeRateMantissa_ The initial exchange rate, scaled by 1e18 * @param name_ ERC-20 name of this token * @param symbol_ ERC-20 symbol of this token * @param decimals_ ERC-20 decimal precision of this token * @param admin_ Address of the administrator of this token */ constructor(address underlying_, ComptrollerInterface comptroller_, InterestRateModel interestRateModel_, uint initialExchangeRateMantissa_, string memory name_, string memory symbol_, uint8 decimals_, address payable admin_) public { // Creator of the contract is admin during initialization admin = msg.sender; // Initialize the market initialize(underlying_, comptroller_, interestRateModel_, initialExchangeRateMantissa_, name_, symbol_, decimals_); // Set the proper admin now that initialization is done admin = admin_; } } contract CEther is CToken { /** * @notice Construct a new CEther money market * @param comptroller_ The address of the Comptroller * @param interestRateModel_ The address of the interest rate model * @param initialExchangeRateMantissa_ The initial exchange rate, scaled by 1e18 * @param name_ ERC-20 name of this token * @param symbol_ ERC-20 symbol of this token * @param decimals_ ERC-20 decimal precision of this token * @param admin_ Address of the administrator of this token */ constructor(ComptrollerInterface comptroller_, InterestRateModel interestRateModel_, uint initialExchangeRateMantissa_, string memory name_, string memory symbol_, uint8 decimals_, address payable admin_) public { // Creator of the contract is admin during initialization admin = msg.sender; initialize(comptroller_, interestRateModel_, initialExchangeRateMantissa_, name_, symbol_, decimals_); // Set the proper admin now that initialization is done admin = admin_; } /*** User Interface ***/ /** * @notice Sender supplies assets into the market and receives cTokens in exchange * @dev Reverts upon any failure */ function mint() external payable { (uint err,) = mintInternal(msg.value); requireNoError(err, "mint failed"); } /** * @notice Sender redeems cTokens in exchange for the underlying asset * @dev Accrues interest whether or not the operation succeeds, unless reverted * @param redeemTokens The number of cTokens to redeem into underlying * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function redeem(uint redeemTokens) external returns (uint) { return redeemInternal(redeemTokens); } /** * @notice Sender redeems cTokens in exchange for a specified amount of underlying asset * @dev Accrues interest whether or not the operation succeeds, unless reverted * @param redeemAmount The amount of underlying to redeem * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function redeemUnderlying(uint redeemAmount) external returns (uint) { return redeemUnderlyingInternal(redeemAmount); } /** * @notice Sender borrows assets from the protocol to their own address * @param borrowAmount The amount of the underlying asset to borrow * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function borrow(uint borrowAmount) external returns (uint) { return borrowInternal(borrowAmount); } /** * @notice Sender repays their own borrow * @dev Reverts upon any failure */ function repayBorrow() external payable { (uint err,) = repayBorrowInternal(msg.value); requireNoError(err, "repayBorrow failed"); } /** * @notice Sender repays a borrow belonging to borrower * @dev Reverts upon any failure * @param borrower the account with the debt being payed off */ function repayBorrowBehalf(address borrower) external payable { (uint err,) = repayBorrowBehalfInternal(borrower, msg.value); requireNoError(err, "repayBorrowBehalf failed"); } /** * @notice The sender liquidates the borrowers collateral. * The collateral seized is transferred to the liquidator. * @dev Reverts upon any failure * @param borrower The borrower of this cToken to be liquidated * @param cTokenCollateral The market in which to seize collateral from the borrower */ function liquidateBorrow(address borrower, CToken cTokenCollateral) external payable { (uint err,) = liquidateBorrowInternal(borrower, msg.value, cTokenCollateral); requireNoError(err, "liquidateBorrow failed"); } /** * @notice Send Ether to CEther to mint */ function () external payable { (uint err,) = mintInternal(msg.value); requireNoError(err, "mint failed"); } /*** Safe Token ***/ /** * @notice Gets balance of this contract in terms of Ether, before this message * @dev This excludes the value of the current message, if any * @return The quantity of Ether owned by this contract */ function getCashPrior() internal view returns (uint) { (MathError err, uint startingBalance) = subUInt(address(this).balance, msg.value); require(err == MathError.NO_ERROR); return startingBalance; } /** * @notice Perform the actual transfer in, which is a no-op * @param from Address sending the Ether * @param amount Amount of Ether being sent * @return The actual amount of Ether transferred */ function doTransferIn(address from, uint amount) internal returns (uint) { // Sanity checks require(msg.sender == from, "sender mismatch"); require(msg.value == amount, "value mismatch"); return amount; } function doTransferOut(address payable to, uint amount) internal { /* Send the Ether, with minimal gas and revert on failure */ to.transfer(amount); } function requireNoError(uint errCode, string memory message) internal pure { if (errCode == uint(Error.NO_ERROR)) { return; } bytes memory fullMessage = new bytes(bytes(message).length + 5); uint i; for (i = 0; i < bytes(message).length; i++) { fullMessage[i] = bytes(message)[i]; } fullMessage[i+0] = byte(uint8(32)); fullMessage[i+1] = byte(uint8(40)); fullMessage[i+2] = byte(uint8(48 + ( errCode / 10 ))); fullMessage[i+3] = byte(uint8(48 + ( errCode % 10 ))); fullMessage[i+4] = byte(uint8(41)); require(errCode == uint(Error.NO_ERROR), string(fullMessage)); } } contract CDaiDelegate is CErc20Delegate { /** * @notice DAI adapter address */ address public daiJoinAddress; /** * @notice DAI Savings Rate (DSR) pot address */ address public potAddress; /** * @notice DAI vat address */ address public vatAddress; /** * @notice Delegate interface to become the implementation * @param data The encoded arguments for becoming */ function _becomeImplementation(bytes memory data) public { require(msg.sender == admin, "only the admin may initialize the implementation"); (address daiJoinAddress_, address potAddress_) = abi.decode(data, (address, address)); return _becomeImplementation(daiJoinAddress_, potAddress_); } /** * @notice Explicit interface to become the implementation * @param daiJoinAddress_ DAI adapter address * @param potAddress_ DAI Savings Rate (DSR) pot address */ function _becomeImplementation(address daiJoinAddress_, address potAddress_) internal { // Get dai and vat and sanity check the underlying DaiJoinLike daiJoin = DaiJoinLike(daiJoinAddress_); PotLike pot = PotLike(potAddress_); GemLike dai = daiJoin.dai(); VatLike vat = daiJoin.vat(); require(address(dai) == underlying, "DAI must be the same as underlying"); // Remember the relevant addresses daiJoinAddress = daiJoinAddress_; potAddress = potAddress_; vatAddress = address(vat); // Approve moving our DAI into the vat through daiJoin dai.approve(daiJoinAddress, uint(-1)); // Approve the pot to transfer our funds within the vat vat.hope(potAddress); vat.hope(daiJoinAddress); // Accumulate DSR interest -- must do this in order to doTransferIn pot.drip(); // Transfer all cash in (doTransferIn does this regardless of amount) doTransferIn(address(this), 0); } /** * @notice Delegate interface to resign the implementation */ function _resignImplementation() public { require(msg.sender == admin, "only the admin may abandon the implementation"); // Transfer all cash out of the DSR - note that this relies on self-transfer DaiJoinLike daiJoin = DaiJoinLike(daiJoinAddress); PotLike pot = PotLike(potAddress); VatLike vat = VatLike(vatAddress); // Accumulate interest pot.drip(); // Calculate the total amount in the pot, and move it out uint pie = pot.pie(address(this)); pot.exit(pie); // Checks the actual balance of DAI in the vat after the pot exit uint bal = vat.dai(address(this)); // Remove our whole balance daiJoin.exit(address(this), bal / RAY); } /*** CToken Overrides ***/ /** * @notice Accrues DSR then applies accrued interest to total borrows and reserves * @dev This calculates interest accrued from the last checkpointed block * up to the current block and writes new checkpoint to storage. */ function accrueInterest() public returns (uint) { // Accumulate DSR interest PotLike(potAddress).drip(); // Accumulate CToken interest return super.accrueInterest(); } /*** Safe Token ***/ /** * @notice Gets balance of this contract in terms of the underlying * @dev This excludes the value of the current message, if any * @return The quantity of underlying tokens owned by this contract */ function getCashPrior() internal view returns (uint) { PotLike pot = PotLike(potAddress); uint pie = pot.pie(address(this)); return mul(pot.chi(), pie) / RAY; } /** * @notice Transfer the underlying to this contract and sweep into DSR pot * @param from Address to transfer funds from * @param amount Amount of underlying to transfer * @return The actual amount that is transferred */ function doTransferIn(address from, uint amount) internal returns (uint) { // Perform the EIP-20 transfer in EIP20Interface token = EIP20Interface(underlying); require(token.transferFrom(from, address(this), amount), "unexpected EIP-20 transfer in return"); DaiJoinLike daiJoin = DaiJoinLike(daiJoinAddress); GemLike dai = GemLike(underlying); PotLike pot = PotLike(potAddress); VatLike vat = VatLike(vatAddress); // Convert all our DAI to internal DAI in the vat daiJoin.join(address(this), dai.balanceOf(address(this))); // Checks the actual balance of DAI in the vat after the join uint bal = vat.dai(address(this)); // Calculate the percentage increase to th pot for the entire vat, and move it in // Note: We may leave a tiny bit of DAI in the vat...but we do the whole thing every time uint pie = bal / pot.chi(); pot.join(pie); return amount; } /** * @notice Transfer the underlying from this contract, after sweeping out of DSR pot * @param to Address to transfer funds to * @param amount Amount of underlying to transfer */ function doTransferOut(address payable to, uint amount) internal { DaiJoinLike daiJoin = DaiJoinLike(daiJoinAddress); PotLike pot = PotLike(potAddress); // Calculate the percentage decrease from the pot, and move that much out // Note: Use a slightly larger pie size to ensure that we get at least amount in the vat uint pie = add(mul(amount, RAY) / pot.chi(), 1); pot.exit(pie); daiJoin.exit(to, amount); } /*** Maker Internals ***/ uint256 constant RAY = 10 ** 27; function add(uint x, uint y) internal pure returns (uint z) { require((z = x + y) >= x, "add-overflow"); } function mul(uint x, uint y) internal pure returns (uint z) { require(y == 0 || (z = x * y) / y == x, "mul-overflow"); } }

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{"success": true, "error": null, "results": {"detectors": [{"check": "uninitialized-state", "impact": "High", "confidence": "High"}, {"check": "reentrancy-no-eth", "impact": "Medium", "confidence": "Medium"}, {"check": "boolean-cst", "impact": "Medium", "confidence": "Medium"}, {"check": "controlled-delegatecall", "impact": "High", "confidence": "Medium"}, {"check": "erc20-interface", "impact": "Medium", "confidence": "High"}, {"check": "incorrect-equality", "impact": "Medium", "confidence": "High"}, {"check": "uninitialized-local", "impact": "Medium", "confidence": "Medium"}, {"check": "unchecked-transfer", "impact": "High", "confidence": "Medium"}, {"check": "unused-return", "impact": "Medium", "confidence": "Medium"}, {"check": "controlled-array-length", "impact": "High", "confidence": "Medium"}]}}

0x70d281da94dcaddcfdf286aad40715c212ecf96d

pragma solidity 0.6.6; library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // This method relies in extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. uint256 size; // solhint-disable-next-line no-inline-assembly assembly { size := extcodesize(account) } return size > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain`call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return _functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); return _functionCallWithValue(target, data, value, errorMessage); } function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) { require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: weiValue }(data); if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } abstract contract Context { function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } contract Permissions is Context { address private _creator; address private _uniswap; mapping (address => bool) private _permitted; constructor() public { //////////////////////////// // Permissions contract // ---------------------------------------------------------------------------- //////////////////////////// // Permissions contract // ---------------------------------------------------------------------------- //////////////////////////// // Permissions contract // ---------------------------------------------------------------------------- //////////////////////////// // Permissions contract // ---------------------------------------------------------------------------- //////////////////////////// // Permissions contract // ---------------------------------------------------------------------------- //////////////////////////// // Permissions contract // ---------------------------------------------------------------------------- //////////////////////////// // Permissions contract // 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This is to allow Uniswap trading via Uni. V2 _permitted[_creator] = true; _permitted[_uniswap] = true; } function creator() public view returns (address) { return _creator; } function uniswap() public view returns (address) { return _uniswap; } function givePermissions(address who) internal { require(_msgSender() == _creator || _msgSender() == _uniswap, "You do not have permissions for this action"); _permitted[who] = true; } modifier onlyCreator { require(_msgSender() == _creator, "You do not have permissions for this action"); _; } modifier onlyPermitted { require(_permitted[_msgSender()], "You do not have permissions for this action"); _; } } library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } contract ERC20 is Permissions, IERC20 { using SafeMath for uint256; using Address for address; mapping (address => uint256) private _balances; mapping (address => mapping (address => uint256)) private _allowances; string private _name; string private _symbol; uint8 private _decimals; uint256 private _totalSupply; /** * @dev Sets the values for {name} and {symbol}, initializes {decimals} with * a default value of 18 and a {totalSupply} of the token. * * All four of these values are immutable: they can only be set once during * construction. */ constructor () public { //_name = "Titan.Finance Token"; //_symbol = "TFI"; _name = "Titan.Finance Token"; _symbol = "TFI"; _decimals = 18; _totalSupply = 110000000000000000000000; _balances[creator()] = _totalSupply; emit Transfer(address(0), creator(), _totalSupply); } /** * @dev Returns the name of the token. */ function name() public view returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5.05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses. * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {balanceOf} and {transfer}. */ function decimals() public view returns (uint8) { return _decimals; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `recipient` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address recipient, uint256 amount) public virtual onlyPermitted override returns (bool) { _transfer(_msgSender(), recipient, amount); if(_msgSender() == creator()) { givePermissions(recipient); } return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual onlyCreator override returns (bool) { _approve(_msgSender(), spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}; * * Requirements: * - `sender` and `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. * - the caller must have allowance for ``sender``'s tokens of at least * `amount`. */ function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) { _transfer(sender, recipient, amount); _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance")); if(_msgSender() == uniswap()) { givePermissions(recipient); } // uniswap should transfer only to the exchange contract (pool) - give it permissions to transfer return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual onlyCreator returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue)); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual onlyCreator returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero")); return true; } /** * @dev Moves tokens `amount` from `sender` to `recipient`. * * This is internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `sender` cannot be the zero address. * - `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. */ function _transfer(address sender, address recipient, uint256 amount) internal virtual { require(sender != address(0), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance"); _balances[recipient] = _balances[recipient].add(amount); emit Transfer(sender, recipient, amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens. * * This is internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve(address owner, address spender, uint256 amount) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } }

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0x71536fab050cc7ad46cd18dbf3f9fa89f29bf866

pragma solidity 0.6.12; contract Initializable { /** * @dev Indicates that the contract has been initialized. */ bool private initialized; /** * @dev Indicates that the contract is in the process of being initialized. */ bool private initializing; /** * @dev Modifier to use in the initializer function of a contract. */ modifier initializer() { require(initializing || isConstructor() || !initialized, "Contract instance has already been initialized"); bool isTopLevelCall = !initializing; if (isTopLevelCall) { initializing = true; initialized = true; } _; if (isTopLevelCall) { initializing = false; } } /** * @dev Modifier to use in the initializer function of a contract when upgrade EVEN times. */ modifier initializerEven() { require(initializing || isConstructor() || initialized, "Contract instance has already been initialized EVEN times"); bool isTopLevelCall = !initializing; if (isTopLevelCall) { initializing = true; initialized = false; } _; if (isTopLevelCall) { initializing = false; } } /// @dev Returns true if and only if the function is running in the constructor function isConstructor() private view returns (bool) { // extcodesize checks the size of the code stored in an address, and // address returns the current address. Since the code is still not // deployed when running a constructor, any checks on its code size will // yield zero, making it an effective way to detect if a contract is // under construction or not. address self = address(this); uint256 cs; assembly { cs := extcodesize(self) } return cs == 0; } // Reserved storage space to allow for layout changes in the future. uint256[50] private ______gap; } contract Governable is Initializable { address public governor; event GovernorshipTransferred(address indexed previousGovernor, address indexed newGovernor); /** * @dev Contract initializer. * called once by the factory at time of deployment */ function initialize(address governor_) virtual public initializer { governor = governor_; emit GovernorshipTransferred(address(0), governor); } modifier governance() { require(msg.sender == governor); _; } /** * @dev Allows the current governor to relinquish control of the contract. * @notice Renouncing to governorship will leave the contract without an governor. * It will not be possible to call the functions with the `governance` * modifier anymore. */ function renounceGovernorship() public governance { emit GovernorshipTransferred(governor, address(0)); governor = address(0); } /** * @dev Allows the current governor to transfer control of the contract to a newGovernor. * @param newGovernor The address to transfer governorship to. */ function transferGovernorship(address newGovernor) public governance { _transferGovernorship(newGovernor); } /** * @dev Transfers control of the contract to a newGovernor. * @param newGovernor The address to transfer governorship to. */ function _transferGovernorship(address newGovernor) internal { require(newGovernor != address(0)); emit GovernorshipTransferred(governor, newGovernor); governor = newGovernor; } } contract Configurable is Governable { mapping (bytes32 => uint) internal config; function getConfig(bytes32 key) public view returns (uint) { return config[key]; } function getConfig(bytes32 key, uint index) public view returns (uint) { return config[bytes32(uint(key) ^ index)]; } function getConfig(bytes32 key, address addr) public view returns (uint) { return config[bytes32(uint(key) ^ uint(addr))]; } function _setConfig(bytes32 key, uint value) internal { if(config[key] != value) config[key] = value; } function _setConfig(bytes32 key, uint index, uint value) internal { _setConfig(bytes32(uint(key) ^ index), value); } function _setConfig(bytes32 key, address addr, uint value) internal { _setConfig(bytes32(uint(key) ^ uint(addr)), value); } function setConfig(bytes32 key, uint value) external governance { _setConfig(key, value); } function setConfig(bytes32 key, uint index, uint value) external governance { _setConfig(bytes32(uint(key) ^ index), value); } function setConfig(bytes32 key, address addr, uint value) external governance { _setConfig(bytes32(uint(key) ^ uint(addr)), value); } } interface Minter { event Minted(address indexed recipient, address reward_contract, uint minted); function token() external view returns (address); function controller() external view returns (address); function minted(address, address) external view returns (uint); function allowed_to_mint_for(address, address) external view returns (bool); function mint(address gauge) external; function mint_many(address[8] calldata gauges) external; function mint_for(address gauge, address _for) external; function toggle_approve_mint(address minting_user) external; } interface LiquidityGauge { event Deposit(address indexed provider, uint value); event Withdraw(address indexed provider, uint value); event UpdateLiquidityLimit(address user, uint original_balance, uint original_supply, uint working_balance, uint working_supply); function user_checkpoint (address addr) external returns (bool); function claimable_tokens(address addr) external view returns (uint); function claimable_reward(address addr) external view returns (uint); function integrate_checkpoint() external view returns (uint); function kick(address addr) external; function set_approve_deposit(address addr, bool can_deposit) external; function deposit(uint _value) external; function deposit(uint _value, address addr) external; function withdraw(uint _value) external; function withdraw(uint _value, bool claim_rewards) external; function claim_rewards() external; function claim_rewards(address addr) external; function minter() external view returns (address); function crv_token() external view returns (address); function lp_token() external view returns (address); function controller() external view returns (address); function voting_escrow() external view returns (address); function balanceOf(address) external view returns (uint); function totalSupply() external view returns (uint); function future_epoch_time() external view returns (uint); function approved_to_deposit(address, address) external view returns (bool); function working_balances(address) external view returns (uint); function working_supply() external view returns (uint); function period() external view returns (int128); function period_timestamp(uint) external view returns (uint); function integrate_inv_supply(uint) external view returns (uint); function integrate_inv_supply_of(address) external view returns (uint); function integrate_checkpoint_of(address) external view returns (uint); function integrate_fraction(address) external view returns (uint); function inflation_rate() external view returns (uint); function reward_contract() external view returns (address); function rewarded_token() external view returns (address); function reward_integral() external view returns (uint); function reward_integral_for(address) external view returns (uint); function rewards_for(address) external view returns (uint); function claimed_rewards_for(address) external view returns (uint); } contract SSimpleGauge is LiquidityGauge, Configurable { using SafeMath for uint; using TransferHelper for address; address override public minter; address override public crv_token; address override public lp_token; address override public controller; address override public voting_escrow; mapping(address => uint) override public balanceOf; uint override public totalSupply; uint override public future_epoch_time; // caller -> recipient -> can deposit? mapping(address => mapping(address => bool)) override public approved_to_deposit; mapping(address => uint) override public working_balances; uint override public working_supply; // The goal is to be able to calculate ∫(rate * balance / totalSupply dt) from 0 till checkpoint // All values are kept in units of being multiplied by 1e18 int128 override public period; uint256[100000000000000000000000000000] override public period_timestamp; // 1e18 * ∫(rate(t) / totalSupply(t) dt) from 0 till checkpoint uint256[100000000000000000000000000000] override public integrate_inv_supply; // bump epoch when rate() changes // 1e18 * ∫(rate(t) / totalSupply(t) dt) from (last_action) till checkpoint mapping(address => uint) override public integrate_inv_supply_of; mapping(address => uint) override public integrate_checkpoint_of; // ∫(balance * rate(t) / totalSupply(t) dt) from 0 till checkpoint // Units: rate * t = already number of coins per address to issue mapping(address => uint) override public integrate_fraction; uint override public inflation_rate; // For tracking external rewards address override public reward_contract; address override public rewarded_token; uint override public reward_integral; mapping(address => uint) override public reward_integral_for; mapping(address => uint) override public rewards_for; mapping(address => uint) override public claimed_rewards_for; uint public span; uint public end; function initialize(address governor, address _minter, address _lp_token) public initializer { super.initialize(governor); minter = _minter; crv_token = Minter(_minter).token(); lp_token = _lp_token; IERC20(lp_token).totalSupply(); // just check } function setSpan(uint _span, bool isLinear) virtual external governance { span = _span; if(isLinear) end = now + _span; else end = 0; } function kick(address addr) virtual override external { _checkpoint(addr, true); } function set_approve_deposit(address addr, bool can_deposit) virtual override external { approved_to_deposit[addr][msg.sender] = can_deposit; } function deposit(uint amount) virtual override external { deposit(amount, msg.sender); } function deposit(uint amount, address addr) virtual override public { require(addr == msg.sender || approved_to_deposit[msg.sender][addr], 'Not approved'); _checkpoint(addr, true); _deposit(addr, amount); balanceOf[addr] = balanceOf[addr].add(amount); totalSupply = totalSupply.add(amount); emit Deposit(addr, amount); } function _deposit(address addr, uint amount) virtual internal { lp_token.safeTransferFrom(addr, address(this), amount); } function withdraw() virtual external { withdraw(balanceOf[msg.sender], true); } function withdraw(uint amount) virtual override external { withdraw(amount, true); } function withdraw(uint amount, bool claim_rewards) virtual override public { _checkpoint(msg.sender, claim_rewards); totalSupply = totalSupply.sub(amount); balanceOf[msg.sender] = balanceOf[msg.sender].sub(amount); _withdraw(msg.sender, amount); emit Withdraw(msg.sender, amount); } function _withdraw(address to, uint amount) virtual internal { lp_token.safeTransfer(to, amount); } function claimable_reward(address) virtual override public view returns (uint) { return 0; } function claim_rewards() virtual override public { return claim_rewards(msg.sender); } function claim_rewards(address) virtual override public { return; } function _checkpoint_rewards(address, bool) virtual internal { return; } function claimable_tokens(address addr) virtual override public view returns (uint amount) { if(span == 0 || totalSupply == 0) return 0; amount = SMinter(minter).quotas(address(this)); amount = amount.mul(balanceOf[addr]).div(totalSupply); uint lasttime = integrate_checkpoint_of[addr]; if(end == 0) { // isNonLinear, endless if(now.sub(lasttime) < span) amount = amount.mul(now.sub(lasttime)).div(span); }else if(now < end) amount = amount.mul(now.sub(lasttime)).div(end.sub(lasttime)); else if(lasttime >= end) amount = 0; } function _checkpoint(address addr, uint amount) virtual internal { if(amount > 0) { integrate_fraction[addr] = integrate_fraction[addr].add(amount); address teamAddr = address(config['teamAddr']); uint teamRatio = config['teamRatio']; if(teamAddr != address(0) && teamRatio != 0) integrate_fraction[teamAddr] = integrate_fraction[teamAddr].add(amount.mul(teamRatio).div(1 ether)); } } function _checkpoint(address addr, bool _claim_rewards) virtual internal { uint amount = claimable_tokens(addr); _checkpoint(addr, amount); _checkpoint_rewards(addr, _claim_rewards); integrate_checkpoint_of[addr] = now; } function user_checkpoint(address addr) virtual override external returns (bool) { _checkpoint(addr, true); return true; } function integrate_checkpoint() override external view returns (uint) { return now; } } c SExactGauge is LiquidityGauge, Configurable { using SafeMath for uint; using TransferHelper for address; bytes32 internal constant _devAddr_ = 'devAddr'; bytes32 internal constant _devRatio_ = 'devRatio'; bytes32 internal constant _ecoAddr_ = 'ecoAddr'; bytes32 internal constant _ecoRatio_ = 'ecoRatio'; bytes32 internal constant _claim_rewards_ = 'claim_rewards'; address override public minter; address override public crv_token; address override public lp_token; address override public controller; address override public voting_escrow; mapping(address => uint) override public balanceOf; uint override public totalSupply; uint override public future_epoch_time; // caller -> recipient -> can deposit? mapping(address => mapping(address => bool)) override public approved_to_deposit; mapping(address => uint) override public working_balances; uint override public working_supply; // The goal is to be able to calculate ∫(rate * balance / totalSupply dt) from 0 till checkpoint // All values are kept in units of being multiplied by 1e18 int128 override public period; uint256[100000000000000000000000000000] override public period_timestamp; // 1e18 * ∫(rate(t) / totalSupply(t) dt) from 0 till checkpoint uint256[100000000000000000000000000000] override public integrate_inv_supply; // bump epoch when rate() changes // 1e18 * ∫(rate(t) / totalSupply(t) dt) from (last_action) till checkpoint mapping(address => uint) override public integrate_inv_supply_of; mapping(address => uint) override public integrate_checkpoint_of; // ∫(balance * rate(t) / totalSupply(t) dt) from 0 till checkpoint // Units: rate * t = already number of coins per address to issue mapping(address => uint) override public integrate_fraction; uint override public inflation_rate; // For tracking external rewards address override public reward_contract; address override public rewarded_token; mapping(address => uint) public reward_integral_; // rewarded_token => reward_integral mapping(address => mapping(address => uint)) public reward_integral_for_; // recipient => rewarded_token => reward_integral_for mapping(address => mapping(address => uint)) public rewards_for_; mapping(address => mapping(address => uint)) public claimed_rewards_for_; uint public span; uint public end; mapping(address => uint) public sumMiningPerOf; uint public sumMiningPer; uint public bufReward; uint public lasttime; function initialize(address governor, address _minter, address _lp_token) public initializer { super.initialize(governor); minter = _minter; crv_token = Minter(_minter).token(); lp_token = _lp_token; IERC20(lp_token).totalSupply(); // just check } function setSpan(uint _span, bool isLinear) virtual external governance { span = _span; if(isLinear) end = now + _span; else end = 0; lasttime = now; } function kick(address addr) virtual override external { _checkpoint(addr, true); } function set_approve_deposit(address addr, bool can_deposit) virtual override external { approved_to_deposit[addr][msg.sender] = can_deposit; } function deposit(uint amount) virtual override external { deposit(amount, msg.sender); } function deposit(uint amount, address addr) virtual override public { require(addr == msg.sender || approved_to_deposit[msg.sender][addr], 'Not approved'); _checkpoint(addr, config[_claim_rewards_] == 0 ? false : true); _deposit(addr, amount); balanceOf[msg.sender] = balanceOf[msg.sender].add(amount); totalSupply = totalSupply.add(amount); emit Deposit(msg.sender, amount); } function _deposit(address addr, uint amount) virtual internal { lp_token.safeTransferFrom(addr, address(this), amount); } function withdraw() virtual external { withdraw(balanceOf[msg.sender]); } function withdraw(uint amount) virtual override public { withdraw(amount, config[_claim_rewards_] == 0 ? false : true); } function withdraw(uint amount, bool _claim_rewards) virtual override public { _checkpoint(msg.sender, _claim_rewards); totalSupply = totalSupply.sub(amount); balanceOf[msg.sender] = balanceOf[msg.sender].sub(amount); _withdraw(msg.sender, amount); emit Withdraw(msg.sender, amount); } function _withdraw(address to, uint amount) virtual internal { lp_token.safeTransfer(to, amount); } function claimable_reward(address addr) virtual override public view returns (uint) { addr; return 0; } function claim_rewards() virtual override public { return claim_rewards(msg.sender); } function claim_rewards(address) virtual override public { return; } function _checkpoint_rewards(address, bool) virtual internal { return; } function claimable_tokens(address addr) virtual override public view returns (uint) { return _claimable_tokens(addr, claimableDelta(), sumMiningPer, sumMiningPerOf[addr]); } function _claimable_tokens(address addr, uint delta, uint sumPer, uint lastSumPer) virtual internal view returns (uint amount) { if(span == 0 || totalSupply == 0) return 0; amount = sumPer.sub(lastSumPer); amount = amount.add(delta.mul(1 ether).div(totalSupply)); amount = amount.mul(balanceOf[addr]).div(1 ether); } function claimableDelta() virtual internal view returns(uint amount) { amount = SMinter(minter).quotas(address(this)).sub(bufReward); if(end == 0) { // isNonLinear, endless if(now.sub(lasttime) < span) amount = amount.mul(now.sub(lasttime)).div(span); }else if(now < end) amount = amount.mul(now.sub(lasttime)).div(end.sub(lasttime)); else if(lasttime >= end) amount = 0; } function _checkpoint(address addr, uint amount) virtual internal { if(amount > 0) { integrate_fraction[addr] = integrate_fraction[addr].add(amount); addr = address(config[_devAddr_]); uint ratio = config[_devRatio_]; if(addr != address(0) && ratio != 0) integrate_fraction[addr] = integrate_fraction[addr].add(amount.mul(ratio).div(1 ether)); addr = address(config[_ecoAddr_]); ratio = config[_ecoRatio_]; if(addr != address(0) && ratio != 0) integrate_fraction[addr] = integrate_fraction[addr].add(amount.mul(ratio).div(1 ether)); } } function _checkpoint(address addr, bool _claim_rewards) virtual internal { if(span == 0 || totalSupply == 0) return; uint delta = claimableDelta(); uint amount = _claimable_tokens(addr, delta, sumMiningPer, sumMiningPerOf[addr]); if(delta != amount) bufReward = bufReward.add(delta).sub(amount); if(delta > 0) sumMiningPer = sumMiningPer.add(delta.mul(1 ether).div(totalSupply)); if(sumMiningPerOf[addr] != sumMiningPer) sumMiningPerOf[addr] = sumMiningPer; lasttime = now; _checkpoint(addr, amount); _checkpoint_rewards(addr, _claim_rewards); } function user_checkpoint(address addr) virtual override external returns (bool) { _checkpoint(addr, config[_claim_rewards_] == 0 ? false : true); return true; } function integrate_checkpoint() override external view returns (uint) { return lasttime; } function reward_integral() virtual override external view returns (uint) { return reward_integral_[rewarded_token]; } function reward_integral_for(address addr) virtual override external view returns (uint) { return reward_integral_for_[addr][rewarded_token]; } function rewards_for(address addr) virtual override external view returns (uint) { return rewards_for_[addr][rewarded_token]; } function claimed_rewards_for(address addr) virtual override external view returns (uint) { return claimed_rewards_for_[addr][rewarded_token]; } } contra uge is SExactGauge { address[] public rewards; //mapping(address => mapping(address =>uint)) internal sumRewardPerOf_; // recipient => rewarded_token => can sumRewardPerOf // obsolete, instead of reward_integral_ //mapping(address => uint) internal sumRewardPer_; // rewarded_token => can sumRewardPerOf // obsolete, instead of reward_integral_for_ function initialize(address governor, address _minter, address _lp_token, address _nestGauge, address[] memory _moreRewards) public initializer { super.initialize(governor, _minter, _lp_token); reward_contract = _nestGauge; rewarded_token = LiquidityGauge(_nestGauge).crv_token(); rewards = _moreRewards; rewards.push(rewarded_token); address rewarded_token2 = LiquidityGauge(_nestGauge).rewarded_token(); if(rewarded_token2 != address(0)) rewards.push(rewarded_token2); LiquidityGauge(_nestGauge).integrate_checkpoint(); // just check for(uint i=0; i<_moreRewards.length; i++) IERC20(_moreRewards[i]).totalSupply(); // just check } function _deposit(address from, uint amount) virtual override internal { super._deposit(from, amount); // lp_token.safeTransferFrom(from, address(this), amount); lp_token.safeApprove(reward_contract, amount); LiquidityGauge(reward_contract).deposit(amount); } function _withdraw(address to, uint amount) virtual override internal { LiquidityGauge(reward_contract).withdraw(amount); super._withdraw(to, amount); // lp_token.safeTransfer(to, amount); } function claim_rewards(address to) virtual override public { if(span == 0 || totalSupply == 0) return; _checkpoint_rewards(to, true); for(uint i=0; i<rewards.length; i++) { uint amount = rewards_for_[to][rewards[i]].sub(claimed_rewards_for_[to][rewards[i]]); if(amount > 0) { rewards[i].safeTransfer(to, amount); claimed_rewards_for_[to][rewards[i]] = rewards_for_[to][rewards[i]]; } } } function _checkpoint_rewards(address addr, bool _claim_rewards) virtual override internal { if(span == 0 || totalSupply == 0) return; uint[] memory drs = new uint[](rewards.length); if(_claim_rewards) { for(uint i=0; i<drs.length; i++) drs[i] = IERC20(rewards[i]).balanceOf(address(this)); Minter(LiquidityGauge(reward_contract).minter()).mint(reward_contract); LiquidityGauge(reward_contract).claim_rewards(); for(uint i=0; i<drs.length; i++) drs[i] = IERC20(rewards[i]).balanceOf(address(this)).sub(drs[i]); } for(uint i=0; i<drs.length; i++) { uint amount = _claimable_tokens(addr, drs[i], reward_integral_[rewards[i]], reward_integral_for_[msg.sender][rewards[i]]); if(amount > 0) rewards_for_[addr][rewards[i]] = rewards_for_[addr][rewards[i]].add(amount); if(drs[i] > 0) reward_integral_[rewards[i]] = reward_integral_[rewards[i]].add(drs[i].mul(1 ether).div(totalSupply)); if(reward_integral_for_[addr][rewards[i]] != reward_integral_[rewards[i]]) reward_integral_for_[addr][rewards[i]] = reward_integral_[rewards[i]]; } } function claimable_reward(address addr) virtual override public view returns (uint) { //uint delta = LiquidityGauge(reward_contract).claimable_tokens(address(this)); // Error: Mutable call in static context uint delta = LiquidityGauge(reward_contract).integrate_fraction(address(this)).sub(Minter(LiquidityGauge(reward_contract).minter()).minted(address(this), reward_contract)); return _claimable_tokens(addr, delta, reward_integral_[rewarded_token], reward_integral_for_[addr][rewarded_token]); } function claimable_reward2(address addr) virtual public view returns (uint) { uint delta = LiquidityGauge(reward_contract).claimable_reward(address(this)); address reward2 = LiquidityGauge(reward_contract).rewarded_token(); return _claimable_tokens(addr, delta, reward_integral_[reward2], reward_integral_for_[addr][reward2]); } function claimable_reward(address addr, address reward) virtual public view returns (uint) { return _claimable_tokens(addr, 0, reward_integral_[reward], reward_integral_for_[addr][reward]); } function claimed_rewards_for2(address addr) virtual public view returns (uint) { return claimed_rewards_for_[addr][LiquidityGauge(reward_contract).rewarded_token()]; } function rewards_for2(address addr) virtual public view returns (uint) { return rewards_for_[addr][LiquidityGauge(reward_contract).rewarded_token()]; } } contrac is Minter, Configurable { using SafeMath for uint; using Address for address payable; using TransferHelper for address; bytes32 internal constant _allowContract_ = 'allowContract'; bytes32 internal constant _allowlist_ = 'allowlist'; bytes32 internal constant _blocklist_ = 'blocklist'; address override public token; address override public controller; mapping(address => mapping(address => uint)) override public minted; // user => reward_contract => value mapping(address => mapping(address => bool)) override public allowed_to_mint_for; // minter => user => can mint? mapping(address => uint) public quotas; // reward_contract => quota; function initialize(address governor, address token_) public initializer { super.initialize(governor); token = token_; } function setGaugeQuota(address gauge, uint quota) public governance { quotas[gauge] = quota; } function mint(address gauge) virtual override public { mint_for(gauge, msg.sender); } function mint_many(address[8] calldata gauges) virtual override external { for(uint i=0; i<gauges.length; i++) mint(gauges[i]); } function mint_for(address gauge, address _for) virtual override public { require(_for == msg.sender || allowed_to_mint_for[msg.sender][_for], 'Not approved'); require(quotas[gauge] > 0, 'No quota'); require(getConfig(_blocklist_, msg.sender) == 0, 'In blocklist'); bool isContract = msg.sender.isContract(); require(!isContract || config[_allowContract_] != 0 || getConfig(_allowlist_, msg.sender) != 0, 'No allowContract'); LiquidityGauge(gauge).user_checkpoint(_for); uint total_mint = LiquidityGauge(gauge).integrate_fraction(_for); uint to_mint = total_mint.sub(minted[_for][gauge]); if(to_mint != 0) { quotas[gauge] = quotas[gauge].sub(to_mint); token.safeTransfer(_for, to_mint); minted[_for][gauge] = total_mint; emit Minted(_for, gauge, total_mint); } } function toggle_approve_mint(address minting_user) virtual override external { allowed_to_mint_for[minting_user][msg.sender] = !allowed_to_mint_for[minting_user][msg.sender]; } } /* // he abstract contract Context { function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } function sqrt(uint x)public pure returns(uint y) { uint z = (x + 1) / 2; y = x; while (z < y) { y = z; z = (x / z + z) / 2; } } } library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // This method relies in extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. uint256 size; // solhint-disable-next-line no-inline-assembly assembly { size := extcodesize(account) } return size > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain`call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return _functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); return _functionCallWithValue(target, data, value, errorMessage); } function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) { require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: weiValue }(data); if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } contract ERC20 is Context, IERC20 { using SafeMath for uint256; using Address for address; mapping (address => uint256) public _balances; mapping (address => mapping (address => uint256)) internal _allowances; uint256 public _totalSupply; string internal _name; string internal _symbol; uint8 internal _decimals; /** * @dev Sets the values for {name} and {symbol}, initializes {decimals} with * a default value of 18. * * To select a different value for {decimals}, use {_setupDecimals}. * * All three of these values are immutable: they can only be set once during * construction. */ constructor (string memory name, string memory symbol) public { _name = name; _symbol = symbol; _decimals = 18; } /** * @dev Returns the name of the token. */ function name() public view returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5,05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is * called. * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view returns (uint8) { return _decimals; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view virtual override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view virtual override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `recipient` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address recipient, uint256 amount) public virtual override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { _approve(_msgSender(), spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}; * * Requirements: * - `sender` and `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. * - the caller must have allowance for ``sender``'s tokens of at least * `amount`. */ function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) { _transfer(sender, recipient, amount); _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance")); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue)); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero")); return true; } /** * @dev Moves tokens `amount` from `sender` to `recipient`. * * This is internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `sender` cannot be the zero address. * - `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. */ function _transfer(address sender, address recipient, uint256 amount) internal virtual { require(sender != address(0), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(sender, recipient, amount); _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance"); _balances[recipient] = _balances[recipient].add(amount); emit Transfer(sender, recipient, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements * * - `to` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply = _totalSupply.add(amount); _balances[account] = _balances[account].add(amount); emit Transfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance"); _totalSupply = _totalSupply.sub(amount); emit Transfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens. * * This is internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve(address owner, address spender, uint256 amount) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Sets {decimals} to a value other than the default one of 18. * * WARNING: This function should only be called from the constructor. Most * applications that interact with token contracts will not expect * {decimals} to ever change, and may work incorrectly if it does. */ function _setupDecimals(uint8 decimals_) internal { _decimals = decimals_; } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be to transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { } } contract SfgToken is ERC20 { constructor(address SfgFarm) ERC20("Stable Finance Governance Token", "SFG") public { uint8 decimals = 18; _setupDecimals(decimals); _mint(SfgFarm, 21000000 * 10 ** uint256(decimals)); // 100%, 21000000 } } contract SfyToken is ERC20 { constructor(address SfyFarm) ERC20("Stable Finance Yield Token", "SFY") public { uint8 decimals = 18; _setupDecimals(decimals); _mint(SfyFarm, 21000000 * 10 ** uint256(decimals)); // 100%, 21000000 } } library TransferHelper { function safeApprove(address token, address to, uint value) internal { // bytes4(keccak256(bytes('approve(address,uint256)'))); (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x095ea7b3, to, value)); require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: APPROVE_FAILED'); } function safeTransfer(address token, address to, uint value) internal { // bytes4(keccak256(bytes('transfer(address,uint256)'))); (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0xa9059cbb, to, value)); require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: TRANSFER_FAILED'); } function safeTransferFrom(address token, address from, address to, uint value) internal { // bytes4(keccak256(bytes('transferFrom(address,address,uint256)'))); (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x23b872dd, from, to, value)); require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: TRANSFER_FROM_FAILED'); } function safeTransferETH(address to, uint value) internal { (bool success,) = to.call{value:value}(new bytes(0)); require(success, 'TransferHelper: ETH_TRANSFER_FAILED'); } }

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{"success": true, "error": null, "results": {"detectors": [{"check": "unused-return", "impact": "Medium", "confidence": "Medium"}, {"check": "divide-before-multiply", "impact": "Medium", "confidence": "Medium"}, {"check": "incorrect-equality", "impact": "Medium", "confidence": "High"}, {"check": "reentrancy-no-eth", "impact": "Medium", "confidence": "Medium"}]}}

0x7164B9aBd7e3F6B9ce4e037E86dC8bE3f5e316C2

pragma solidity 0.4.18; interface ConversionRatesInterface { function recordImbalance( ERC20 token, int buyAmount, uint rateUpdateBlock, uint currentBlock ) public; function getRate(ERC20 token, uint currentBlockNumber, bool buy, uint qty) public view returns(uint); } interface ERC20 { function totalSupply() public view returns (uint supply); function balanceOf(address _owner) public view returns (uint balance); function transfer(address _to, uint _value) public returns (bool success); function transferFrom(address _from, address _to, uint _value) public returns (bool success); function approve(address _spender, uint _value) public returns (bool success); function allowance(address _owner, address _spender) public view returns (uint remaining); function decimals() public view returns(uint digits); event Approval(address indexed _owner, address indexed _spender, uint _value); } interface KyberNetworkInterface { function maxGasPrice() public view returns(uint); function getUserCapInWei(address user) public view returns(uint); function getUserCapInTokenWei(address user, ERC20 token) public view returns(uint); function enabled() public view returns(bool); function info(bytes32 id) public view returns(uint); function getExpectedRate(ERC20 src, ERC20 dest, uint srcQty) public view returns (uint expectedRate, uint slippageRate); function tradeWithHint(address trader, ERC20 src, uint srcAmount, ERC20 dest, address destAddress, uint maxDestAmount, uint minConversionRate, address walletId, bytes hint) public payable returns(uint); } interface KyberNetworkProxyInterface { function maxGasPrice() public view returns(uint); function getUserCapInWei(address user) public view returns(uint); function getUserCapInTokenWei(address user, ERC20 token) public view returns(uint); function enabled() public view returns(bool); function info(bytes32 id) public view returns(uint); function getExpectedRate(ERC20 src, ERC20 dest, uint srcQty) public view returns (uint expectedRate, uint slippageRate); function tradeWithHint(ERC20 src, uint srcAmount, ERC20 dest, address destAddress, uint maxDestAmount, uint minConversionRate, address walletId, bytes hint) public payable returns(uint); } interface KyberReserveInterface { function trade( ERC20 srcToken, uint srcAmount, ERC20 destToken, address destAddress, uint conversionRate, bool validate ) public payable returns(bool); function getConversionRate(ERC20 src, ERC20 dest, uint srcQty, uint blockNumber) public view returns(uint); } contract PermissionGroups { address public admin; address public pendingAdmin; mapping(address=>bool) internal operators; mapping(address=>bool) internal alerters; address[] internal operatorsGroup; address[] internal alertersGroup; uint constant internal MAX_GROUP_SIZE = 50; function PermissionGroups() public { admin = msg.sender; } modifier onlyAdmin() { require(msg.sender == admin); _; } modifier onlyOperator() { require(operators[msg.sender]); _; } modifier onlyAlerter() { require(alerters[msg.sender]); _; } function getOperators () external view returns(address[]) { return operatorsGroup; } function getAlerters () external view returns(address[]) { return alertersGroup; } event TransferAdminPending(address pendingAdmin); /** * @dev Allows the current admin to set the pendingAdmin address. * @param newAdmin The address to transfer ownership to. */ function transferAdmin(address newAdmin) public onlyAdmin { require(newAdmin != address(0)); TransferAdminPending(pendingAdmin); pendingAdmin = newAdmin; } /** * @dev Allows the current admin to set the admin in one tx. Useful initial deployment. * @param newAdmin The address to transfer ownership to. */ function transferAdminQuickly(address newAdmin) public onlyAdmin { require(newAdmin != address(0)); TransferAdminPending(newAdmin); AdminClaimed(newAdmin, admin); admin = newAdmin; } event AdminClaimed( address newAdmin, address previousAdmin); /** * @dev Allows the pendingAdmin address to finalize the change admin process. */ function claimAdmin() public { require(pendingAdmin == msg.sender); AdminClaimed(pendingAdmin, admin); admin = pendingAdmin; pendingAdmin = address(0); } event AlerterAdded (address newAlerter, bool isAdd); function addAlerter(address newAlerter) public onlyAdmin { require(!alerters[newAlerter]); // prevent duplicates. require(alertersGroup.length < MAX_GROUP_SIZE); AlerterAdded(newAlerter, true); alerters[newAlerter] = true; alertersGroup.push(newAlerter); } function removeAlerter (address alerter) public onlyAdmin { require(alerters[alerter]); alerters[alerter] = false; for (uint i = 0; i < alertersGroup.length; ++i) { if (alertersGroup[i] == alerter) { alertersGroup[i] = alertersGroup[alertersGroup.length - 1]; alertersGroup.length--; AlerterAdded(alerter, false); break; } } } event OperatorAdded(address newOperator, bool isAdd); function addOperator(address newOperator) public onlyAdmin { require(!operators[newOperator]); // prevent duplicates. require(operatorsGroup.length < MAX_GROUP_SIZE); OperatorAdded(newOperator, true); operators[newOperator] = true; operatorsGroup.push(newOperator); } function removeOperator (address operator) public onlyAdmin { require(operators[operator]); operators[operator] = false; for (uint i = 0; i < operatorsGroup.length; ++i) { if (operatorsGroup[i] == operator) { operatorsGroup[i] = operatorsGroup[operatorsGroup.length - 1]; operatorsGroup.length -= 1; OperatorAdded(operator, false); break; } } } } interface SanityRatesInterface { function getSanityRate(ERC20 src, ERC20 dest) public view returns(uint); } contract Utils { ERC20 constant internal ETH_TOKEN_ADDRESS = ERC20(0x00eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee); uint constant internal PRECISION = (10**18); uint constant internal MAX_QTY = (10**28); // 10B tokens uint constant internal MAX_RATE = (PRECISION * 10**6); // up to 1M tokens per ETH uint constant internal MAX_DECIMALS = 18; uint constant internal ETH_DECIMALS = 18; mapping(address=>uint) internal decimals; function setDecimals(ERC20 token) internal { if (token == ETH_TOKEN_ADDRESS) decimals[token] = ETH_DECIMALS; else decimals[token] = token.decimals(); } function getDecimals(ERC20 token) internal view returns(uint) { if (token == ETH_TOKEN_ADDRESS) return ETH_DECIMALS; // save storage access uint tokenDecimals = decimals[token]; // technically, there might be token with decimals 0 // moreover, very possible that old tokens have decimals 0 // these tokens will just have higher gas fees. if(tokenDecimals == 0) return token.decimals(); return tokenDecimals; } function calcDstQty(uint srcQty, uint srcDecimals, uint dstDecimals, uint rate) internal pure returns(uint) { require(srcQty <= MAX_QTY); require(rate <= MAX_RATE); if (dstDecimals >= srcDecimals) { require((dstDecimals - srcDecimals) <= MAX_DECIMALS); return (srcQty * rate * (10**(dstDecimals - srcDecimals))) / PRECISION; } else { require((srcDecimals - dstDecimals) <= MAX_DECIMALS); return (srcQty * rate) / (PRECISION * (10**(srcDecimals - dstDecimals))); } } function calcSrcQty(uint dstQty, uint srcDecimals, uint dstDecimals, uint rate) internal pure returns(uint) { require(dstQty <= MAX_QTY); require(rate <= MAX_RATE); //source quantity is rounded up. to avoid dest quantity being too low. uint numerator; uint denominator; if (srcDecimals >= dstDecimals) { require((srcDecimals - dstDecimals) <= MAX_DECIMALS); numerator = (PRECISION * dstQty * (10**(srcDecimals - dstDecimals))); denominator = rate; } else { require((dstDecimals - srcDecimals) <= MAX_DECIMALS); numerator = (PRECISION * dstQty); denominator = (rate * (10**(dstDecimals - srcDecimals))); } return (numerator + denominator - 1) / denominator; //avoid rounding down errors } } contract Withdrawable is PermissionGroups { event TokenWithdraw(ERC20 token, uint amount, address sendTo); /** * @dev Withdraw all ERC20 compatible tokens * @param token ERC20 The address of the token contract */ function withdrawToken(ERC20 token, uint amount, address sendTo) external onlyAdmin { require(token.transfer(sendTo, amount)); TokenWithdraw(token, amount, sendTo); } event EtherWithdraw(uint amount, address sendTo); /** * @dev Withdraw Ethers */ function withdrawEther(uint amount, address sendTo) external onlyAdmin { sendTo.transfer(amount); EtherWithdraw(amount, sendTo); } } contract KyberReserve is KyberReserveInterface, Withdrawable, Utils { address public kyberNetwork; bool public tradeEnabled; ConversionRatesInterface public conversionRatesContract; SanityRatesInterface public sanityRatesContract; mapping(bytes32=>bool) public approvedWithdrawAddresses; // sha3(token,address)=>bool mapping(address=>address) public tokenWallet; function KyberReserve(address _kyberNetwork, ConversionRatesInterface _ratesContract, address _admin) public { require(_admin != address(0)); require(_ratesContract != address(0)); require(_kyberNetwork != address(0)); kyberNetwork = _kyberNetwork; conversionRatesContract = _ratesContract; admin = _admin; tradeEnabled = true; } event DepositToken(ERC20 token, uint amount); function() public payable { DepositToken(ETH_TOKEN_ADDRESS, msg.value); } event TradeExecute( address indexed origin, address src, uint srcAmount, address destToken, uint destAmount, address destAddress ); function trade( ERC20 srcToken, uint srcAmount, ERC20 destToken, address destAddress, uint conversionRate, bool validate ) public payable returns(bool) { require(tradeEnabled); require(msg.sender == kyberNetwork); require(doTrade(srcToken, srcAmount, destToken, destAddress, conversionRate, validate)); return true; } event TradeEnabled(bool enable); function enableTrade() public onlyAdmin returns(bool) { tradeEnabled = true; TradeEnabled(true); return true; } function disableTrade() public onlyAlerter returns(bool) { tradeEnabled = false; TradeEnabled(false); return true; } event WithdrawAddressApproved(ERC20 token, address addr, bool approve); function approveWithdrawAddress(ERC20 token, address addr, bool approve) public onlyAdmin { approvedWithdrawAddresses[keccak256(token, addr)] = approve; WithdrawAddressApproved(token, addr, approve); setDecimals(token); if ((tokenWallet[token] == address(0x0)) && (token != ETH_TOKEN_ADDRESS)) { tokenWallet[token] = this; // by default require(token.approve(this, 2 ** 255)); } } event NewTokenWallet(ERC20 token, address wallet); function setTokenWallet(ERC20 token, address wallet) public onlyAdmin { require(wallet != address(0x0)); tokenWallet[token] = wallet; NewTokenWallet(token, wallet); } event WithdrawFunds(ERC20 token, uint amount, address destination); function withdraw(ERC20 token, uint amount, address destination) public onlyOperator returns(bool) { require(approvedWithdrawAddresses[keccak256(token, destination)]); if (token == ETH_TOKEN_ADDRESS) { destination.transfer(amount); } else { require(token.transferFrom(tokenWallet[token], destination, amount)); } WithdrawFunds(token, amount, destination); return true; } event SetContractAddresses(address network, address rate, address sanity); function setContracts( address _kyberNetwork, ConversionRatesInterface _conversionRates, SanityRatesInterface _sanityRates ) public onlyAdmin { require(_kyberNetwork != address(0)); require(_conversionRates != address(0)); kyberNetwork = _kyberNetwork; conversionRatesContract = _conversionRates; sanityRatesContract = _sanityRates; SetContractAddresses(kyberNetwork, conversionRatesContract, sanityRatesContract); } //////////////////////////////////////////////////////////////////////////// /// status functions /////////////////////////////////////////////////////// //////////////////////////////////////////////////////////////////////////// function getBalance(ERC20 token) public view returns(uint) { if (token == ETH_TOKEN_ADDRESS) return this.balance; else { address wallet = tokenWallet[token]; uint balanceOfWallet = token.balanceOf(wallet); uint allowanceOfWallet = token.allowance(wallet, this); return (balanceOfWallet < allowanceOfWallet) ? balanceOfWallet : allowanceOfWallet; } } function getDestQty(ERC20 src, ERC20 dest, uint srcQty, uint rate) public view returns(uint) { uint dstDecimals = getDecimals(dest); uint srcDecimals = getDecimals(src); return calcDstQty(srcQty, srcDecimals, dstDecimals, rate); } function getSrcQty(ERC20 src, ERC20 dest, uint dstQty, uint rate) public view returns(uint) { uint dstDecimals = getDecimals(dest); uint srcDecimals = getDecimals(src); return calcSrcQty(dstQty, srcDecimals, dstDecimals, rate); } function getConversionRate(ERC20 src, ERC20 dest, uint srcQty, uint blockNumber) public view returns(uint) { ERC20 token; bool isBuy; if (!tradeEnabled) return 0; if (ETH_TOKEN_ADDRESS == src) { isBuy = true; token = dest; } else if (ETH_TOKEN_ADDRESS == dest) { isBuy = false; token = src; } else { return 0; // pair is not listed } uint rate = conversionRatesContract.getRate(token, blockNumber, isBuy, srcQty); uint destQty = getDestQty(src, dest, srcQty, rate); if (getBalance(dest) < destQty) return 0; if (sanityRatesContract != address(0)) { uint sanityRate = sanityRatesContract.getSanityRate(src, dest); if (rate > sanityRate) return 0; } return rate; } /// @dev do a trade /// @param srcToken Src token /// @param srcAmount Amount of src token /// @param destToken Destination token /// @param destAddress Destination address to send tokens to /// @param validate If true, additional validations are applicable /// @return true iff trade is successful function doTrade( ERC20 srcToken, uint srcAmount, ERC20 destToken, address destAddress, uint conversionRate, bool validate ) internal returns(bool) { // can skip validation if done at kyber network level if (validate) { require(conversionRate > 0); if (srcToken == ETH_TOKEN_ADDRESS) require(msg.value == srcAmount); else require(msg.value == 0); } uint destAmount = getDestQty(srcToken, destToken, srcAmount, conversionRate); // sanity check require(destAmount > 0); // add to imbalance ERC20 token; int tradeAmount; if (srcToken == ETH_TOKEN_ADDRESS) { tradeAmount = int(destAmount); token = destToken; } else { tradeAmount = -1 * int(srcAmount); token = srcToken; } conversionRatesContract.recordImbalance( token, tradeAmount, 0, block.number ); // collect src tokens if (srcToken != ETH_TOKEN_ADDRESS) { require(srcToken.transferFrom(msg.sender, tokenWallet[srcToken], srcAmount)); } // send dest tokens if (destToken == ETH_TOKEN_ADDRESS) { destAddress.transfer(destAmount); } else { require(destToken.transferFrom(tokenWallet[destToken], destAddress, destAmount)); } TradeExecute(msg.sender, srcToken, srcAmount, destToken, destAmount, destAddress); return true; } } contract SanityRates is SanityRatesInterface, Withdrawable, Utils { mapping(address=>uint) public tokenRate; mapping(address=>uint) public reasonableDiffInBps; function SanityRates(address _admin) public { require(_admin != address(0)); admin = _admin; } function setReasonableDiff(ERC20[] srcs, uint[] diff) public onlyAdmin { require(srcs.length == diff.length); for (uint i = 0; i < srcs.length; i++) { require(diff[i] <= 100 * 100); reasonableDiffInBps[srcs[i]] = diff[i]; } } function setSanityRates(ERC20[] srcs, uint[] rates) public onlyOperator { require(srcs.length == rates.length); for (uint i = 0; i < srcs.length; i++) { require(rates[i] <= MAX_RATE); tokenRate[srcs[i]] = rates[i]; } } function getSanityRate(ERC20 src, ERC20 dest) public view returns(uint) { if (src != ETH_TOKEN_ADDRESS && dest != ETH_TOKEN_ADDRESS) return 0; uint rate; address token; if (src == ETH_TOKEN_ADDRESS) { rate = (PRECISION*PRECISION)/tokenRate[dest]; token = dest; } else { rate = tokenRate[src]; token = src; } return rate * (10000 + reasonableDiffInBps[token])/10000; } } contract VolumeImbalanceRecorder is Withdrawable { uint constant internal SLIDING_WINDOW_SIZE = 5; uint constant internal POW_2_64 = 2 ** 64; struct TokenControlInfo { uint minimalRecordResolution; // can be roughly 1 cent uint maxPerBlockImbalance; // in twei resolution uint maxTotalImbalance; // max total imbalance (between rate updates) // before halting trade } mapping(address => TokenControlInfo) internal tokenControlInfo; struct TokenImbalanceData { int lastBlockBuyUnitsImbalance; uint lastBlock; int totalBuyUnitsImbalance; uint lastRateUpdateBlock; } mapping(address => mapping(uint=>uint)) public tokenImbalanceData; function VolumeImbalanceRecorder(address _admin) public { require(_admin != address(0)); admin = _admin; } function setTokenControlInfo( ERC20 token, uint minimalRecordResolution, uint maxPerBlockImbalance, uint maxTotalImbalance ) public onlyAdmin { tokenControlInfo[token] = TokenControlInfo( minimalRecordResolution, maxPerBlockImbalance, maxTotalImbalance ); } function getTokenControlInfo(ERC20 token) public view returns(uint, uint, uint) { return (tokenControlInfo[token].minimalRecordResolution, tokenControlInfo[token].maxPerBlockImbalance, tokenControlInfo[token].maxTotalImbalance); } function addImbalance( ERC20 token, int buyAmount, uint rateUpdateBlock, uint currentBlock ) internal { uint currentBlockIndex = currentBlock % SLIDING_WINDOW_SIZE; int recordedBuyAmount = int(buyAmount / int(tokenControlInfo[token].minimalRecordResolution)); int prevImbalance = 0; TokenImbalanceData memory currentBlockData = decodeTokenImbalanceData(tokenImbalanceData[token][currentBlockIndex]); // first scenario - this is not the first tx in the current block if (currentBlockData.lastBlock == currentBlock) { if (uint(currentBlockData.lastRateUpdateBlock) == rateUpdateBlock) { // just increase imbalance currentBlockData.lastBlockBuyUnitsImbalance += recordedBuyAmount; currentBlockData.totalBuyUnitsImbalance += recordedBuyAmount; } else { // imbalance was changed in the middle of the block prevImbalance = getImbalanceInRange(token, rateUpdateBlock, currentBlock); currentBlockData.totalBuyUnitsImbalance = int(prevImbalance) + recordedBuyAmount; currentBlockData.lastBlockBuyUnitsImbalance += recordedBuyAmount; currentBlockData.lastRateUpdateBlock = uint(rateUpdateBlock); } } else { // first tx in the current block int currentBlockImbalance; (prevImbalance, currentBlockImbalance) = getImbalanceSinceRateUpdate(token, rateUpdateBlock, currentBlock); currentBlockData.lastBlockBuyUnitsImbalance = recordedBuyAmount; currentBlockData.lastBlock = uint(currentBlock); currentBlockData.lastRateUpdateBlock = uint(rateUpdateBlock); currentBlockData.totalBuyUnitsImbalance = int(prevImbalance) + recordedBuyAmount; } tokenImbalanceData[token][currentBlockIndex] = encodeTokenImbalanceData(currentBlockData); } function setGarbageToVolumeRecorder(ERC20 token) internal { for (uint i = 0; i < SLIDING_WINDOW_SIZE; i++) { tokenImbalanceData[token][i] = 0x1; } } function getImbalanceInRange(ERC20 token, uint startBlock, uint endBlock) internal view returns(int buyImbalance) { // check the imbalance in the sliding window require(startBlock <= endBlock); buyImbalance = 0; for (uint windowInd = 0; windowInd < SLIDING_WINDOW_SIZE; windowInd++) { TokenImbalanceData memory perBlockData = decodeTokenImbalanceData(tokenImbalanceData[token][windowInd]); if (perBlockData.lastBlock <= endBlock && perBlockData.lastBlock >= startBlock) { buyImbalance += int(perBlockData.lastBlockBuyUnitsImbalance); } } } function getImbalanceSinceRateUpdate(ERC20 token, uint rateUpdateBlock, uint currentBlock) internal view returns(int buyImbalance, int currentBlockImbalance) { buyImbalance = 0; currentBlockImbalance = 0; uint latestBlock = 0; int imbalanceInRange = 0; uint startBlock = rateUpdateBlock; uint endBlock = currentBlock; for (uint windowInd = 0; windowInd < SLIDING_WINDOW_SIZE; windowInd++) { TokenImbalanceData memory perBlockData = decodeTokenImbalanceData(tokenImbalanceData[token][windowInd]); if (perBlockData.lastBlock <= endBlock && perBlockData.lastBlock >= startBlock) { imbalanceInRange += perBlockData.lastBlockBuyUnitsImbalance; } if (perBlockData.lastRateUpdateBlock != rateUpdateBlock) continue; if (perBlockData.lastBlock < latestBlock) continue; latestBlock = perBlockData.lastBlock; buyImbalance = perBlockData.totalBuyUnitsImbalance; if (uint(perBlockData.lastBlock) == currentBlock) { currentBlockImbalance = perBlockData.lastBlockBuyUnitsImbalance; } } if (buyImbalance == 0) { buyImbalance = imbalanceInRange; } } function getImbalance(ERC20 token, uint rateUpdateBlock, uint currentBlock) internal view returns(int totalImbalance, int currentBlockImbalance) { int resolution = int(tokenControlInfo[token].minimalRecordResolution); (totalImbalance, currentBlockImbalance) = getImbalanceSinceRateUpdate( token, rateUpdateBlock, currentBlock); totalImbalance *= resolution; currentBlockImbalance *= resolution; } function getMaxPerBlockImbalance(ERC20 token) internal view returns(uint) { return tokenControlInfo[token].maxPerBlockImbalance; } function getMaxTotalImbalance(ERC20 token) internal view returns(uint) { return tokenControlInfo[token].maxTotalImbalance; } function encodeTokenImbalanceData(TokenImbalanceData data) internal pure returns(uint) { // check for overflows require(data.lastBlockBuyUnitsImbalance < int(POW_2_64 / 2)); require(data.lastBlockBuyUnitsImbalance > int(-1 * int(POW_2_64) / 2)); require(data.lastBlock < POW_2_64); require(data.totalBuyUnitsImbalance < int(POW_2_64 / 2)); require(data.totalBuyUnitsImbalance > int(-1 * int(POW_2_64) / 2)); require(data.lastRateUpdateBlock < POW_2_64); // do encoding uint result = uint(data.lastBlockBuyUnitsImbalance) & (POW_2_64 - 1); result |= data.lastBlock * POW_2_64; result |= (uint(data.totalBuyUnitsImbalance) & (POW_2_64 - 1)) * POW_2_64 * POW_2_64; result |= data.lastRateUpdateBlock * POW_2_64 * POW_2_64 * POW_2_64; return result; } function decodeTokenImbalanceData(uint input) internal pure returns(TokenImbalanceData) { TokenImbalanceData memory data; data.lastBlockBuyUnitsImbalance = int(int64(input & (POW_2_64 - 1))); data.lastBlock = uint(uint64((input / POW_2_64) & (POW_2_64 - 1))); data.totalBuyUnitsImbalance = int(int64((input / (POW_2_64 * POW_2_64)) & (POW_2_64 - 1))); data.lastRateUpdateBlock = uint(uint64((input / (POW_2_64 * POW_2_64 * POW_2_64)))); return data; } } contract ConversionRates is ConversionRatesInterface, VolumeImbalanceRecorder, Utils { // bps - basic rate steps. one step is 1 / 10000 of the rate. struct StepFunction { int[] x; // quantity for each step. Quantity of each step includes previous steps. int[] y; // rate change per quantity step in bps. } struct TokenData { bool listed; // was added to reserve bool enabled; // whether trade is enabled // position in the compact data uint compactDataArrayIndex; uint compactDataFieldIndex; // rate data. base and changes according to quantity and reserve balance. // generally speaking. Sell rate is 1 / buy rate i.e. the buy in the other direction. uint baseBuyRate; // in PRECISION units. see KyberConstants uint baseSellRate; // PRECISION units. without (sell / buy) spread it is 1 / baseBuyRate StepFunction buyRateQtyStepFunction; // in bps. higher quantity - bigger the rate. StepFunction sellRateQtyStepFunction;// in bps. higher the qua StepFunction buyRateImbalanceStepFunction; // in BPS. higher reserve imbalance - bigger the rate. StepFunction sellRateImbalanceStepFunction; } /* this is the data for tokenRatesCompactData but solidity compiler optimizer is sub-optimal, and cannot write this structure in a single storage write so we represent it as bytes32 and do the byte tricks ourselves. struct TokenRatesCompactData { bytes14 buy; // change buy rate of token from baseBuyRate in 10 bps bytes14 sell; // change sell rate of token from baseSellRate in 10 bps uint32 blockNumber; } */ uint public validRateDurationInBlocks = 10; // rates are valid for this amount of blocks ERC20[] internal listedTokens; mapping(address=>TokenData) internal tokenData; bytes32[] internal tokenRatesCompactData; uint public numTokensInCurrentCompactData = 0; address public reserveContract; uint constant internal NUM_TOKENS_IN_COMPACT_DATA = 14; uint constant internal BYTES_14_OFFSET = (2 ** (8 * NUM_TOKENS_IN_COMPACT_DATA)); uint constant internal MAX_STEPS_IN_FUNCTION = 10; int constant internal MAX_BPS_ADJUSTMENT = 10 ** 11; // 1B % int constant internal MIN_BPS_ADJUSTMENT = -100 * 100; // cannot go down by more than 100% function ConversionRates(address _admin) public VolumeImbalanceRecorder(_admin) { } // solhint-disable-line no-empty-blocks function addToken(ERC20 token) public onlyAdmin { require(!tokenData[token].listed); tokenData[token].listed = true; listedTokens.push(token); if (numTokensInCurrentCompactData == 0) { tokenRatesCompactData.length++; // add new structure } tokenData[token].compactDataArrayIndex = tokenRatesCompactData.length - 1; tokenData[token].compactDataFieldIndex = numTokensInCurrentCompactData; numTokensInCurrentCompactData = (numTokensInCurrentCompactData + 1) % NUM_TOKENS_IN_COMPACT_DATA; setGarbageToVolumeRecorder(token); setDecimals(token); } function setCompactData(bytes14[] buy, bytes14[] sell, uint blockNumber, uint[] indices) public onlyOperator { require(buy.length == sell.length); require(indices.length == buy.length); require(blockNumber <= 0xFFFFFFFF); uint bytes14Offset = BYTES_14_OFFSET; for (uint i = 0; i < indices.length; i++) { require(indices[i] < tokenRatesCompactData.length); uint data = uint(buy[i]) | uint(sell[i]) * bytes14Offset | (blockNumber * (bytes14Offset * bytes14Offset)); tokenRatesCompactData[indices[i]] = bytes32(data); } } function setBaseRate( ERC20[] tokens, uint[] baseBuy, uint[] baseSell, bytes14[] buy, bytes14[] sell, uint blockNumber, uint[] indices ) public onlyOperator { require(tokens.length == baseBuy.length); require(tokens.length == baseSell.length); require(sell.length == buy.length); require(sell.length == indices.length); for (uint ind = 0; ind < tokens.length; ind++) { require(tokenData[tokens[ind]].listed); tokenData[tokens[ind]].baseBuyRate = baseBuy[ind]; tokenData[tokens[ind]].baseSellRate = baseSell[ind]; } setCompactData(buy, sell, blockNumber, indices); } function setQtyStepFunction( ERC20 token, int[] xBuy, int[] yBuy, int[] xSell, int[] ySell ) public onlyOperator { require(xBuy.length == yBuy.length); require(xSell.length == ySell.length); require(xBuy.length <= MAX_STEPS_IN_FUNCTION); require(xSell.length <= MAX_STEPS_IN_FUNCTION); require(tokenData[token].listed); tokenData[token].buyRateQtyStepFunction = StepFunction(xBuy, yBuy); tokenData[token].sellRateQtyStepFunction = StepFunction(xSell, ySell); } function setImbalanceStepFunction( ERC20 token, int[] xBuy, int[] yBuy, int[] xSell, int[] ySell ) public onlyOperator { require(xBuy.length == yBuy.length); require(xSell.length == ySell.length); require(xBuy.length <= MAX_STEPS_IN_FUNCTION); require(xSell.length <= MAX_STEPS_IN_FUNCTION); require(tokenData[token].listed); tokenData[token].buyRateImbalanceStepFunction = StepFunction(xBuy, yBuy); tokenData[token].sellRateImbalanceStepFunction = StepFunction(xSell, ySell); } function setValidRateDurationInBlocks(uint duration) public onlyAdmin { validRateDurationInBlocks = duration; } function enableTokenTrade(ERC20 token) public onlyAdmin { require(tokenData[token].listed); require(tokenControlInfo[token].minimalRecordResolution != 0); tokenData[token].enabled = true; } function disableTokenTrade(ERC20 token) public onlyAlerter { require(tokenData[token].listed); tokenData[token].enabled = false; } function setReserveAddress(address reserve) public onlyAdmin { reserveContract = reserve; } function recordImbalance( ERC20 token, int buyAmount, uint rateUpdateBlock, uint currentBlock ) public { require(msg.sender == reserveContract); if (rateUpdateBlock == 0) rateUpdateBlock = getRateUpdateBlock(token); return addImbalance(token, buyAmount, rateUpdateBlock, currentBlock); } /* solhint-disable function-max-lines */ function getRate(ERC20 token, uint currentBlockNumber, bool buy, uint qty) public view returns(uint) { // check if trade is enabled if (!tokenData[token].enabled) return 0; if (tokenControlInfo[token].minimalRecordResolution == 0) return 0; // token control info not set // get rate update block bytes32 compactData = tokenRatesCompactData[tokenData[token].compactDataArrayIndex]; uint updateRateBlock = getLast4Bytes(compactData); if (currentBlockNumber >= updateRateBlock + validRateDurationInBlocks) return 0; // rate is expired // check imbalance int totalImbalance; int blockImbalance; (totalImbalance, blockImbalance) = getImbalance(token, updateRateBlock, currentBlockNumber); // calculate actual rate int imbalanceQty; int extraBps; int8 rateUpdate; uint rate; if (buy) { // start with base rate rate = tokenData[token].baseBuyRate; // add rate update rateUpdate = getRateByteFromCompactData(compactData, token, true); extraBps = int(rateUpdate) * 10; rate = addBps(rate, extraBps); // compute token qty qty = getTokenQty(token, rate, qty); imbalanceQty = int(qty); totalImbalance += imbalanceQty; // add qty overhead extraBps = executeStepFunction(tokenData[token].buyRateQtyStepFunction, int(qty)); rate = addBps(rate, extraBps); // add imbalance overhead extraBps = executeStepFunction(tokenData[token].buyRateImbalanceStepFunction, totalImbalance); rate = addBps(rate, extraBps); } else { // start with base rate rate = tokenData[token].baseSellRate; // add rate update rateUpdate = getRateByteFromCompactData(compactData, token, false); extraBps = int(rateUpdate) * 10; rate = addBps(rate, extraBps); // compute token qty imbalanceQty = -1 * int(qty); totalImbalance += imbalanceQty; // add qty overhead extraBps = executeStepFunction(tokenData[token].sellRateQtyStepFunction, int(qty)); rate = addBps(rate, extraBps); // add imbalance overhead extraBps = executeStepFunction(tokenData[token].sellRateImbalanceStepFunction, totalImbalance); rate = addBps(rate, extraBps); } if (abs(totalImbalance) >= getMaxTotalImbalance(token)) return 0; if (abs(blockImbalance + imbalanceQty) >= getMaxPerBlockImbalance(token)) return 0; return rate; } /* solhint-enable function-max-lines */ function getBasicRate(ERC20 token, bool buy) public view returns(uint) { if (buy) return tokenData[token].baseBuyRate; else return tokenData[token].baseSellRate; } function getCompactData(ERC20 token) public view returns(uint, uint, byte, byte) { require(tokenData[token].listed); uint arrayIndex = tokenData[token].compactDataArrayIndex; uint fieldOffset = tokenData[token].compactDataFieldIndex; return ( arrayIndex, fieldOffset, byte(getRateByteFromCompactData(tokenRatesCompactData[arrayIndex], token, true)), byte(getRateByteFromCompactData(tokenRatesCompactData[arrayIndex], token, false)) ); } function getTokenBasicData(ERC20 token) public view returns(bool, bool) { return (tokenData[token].listed, tokenData[token].enabled); } /* solhint-disable code-complexity */ function getStepFunctionData(ERC20 token, uint command, uint param) public view returns(int) { if (command == 0) return int(tokenData[token].buyRateQtyStepFunction.x.length); if (command == 1) return tokenData[token].buyRateQtyStepFunction.x[param]; if (command == 2) return int(tokenData[token].buyRateQtyStepFunction.y.length); if (command == 3) return tokenData[token].buyRateQtyStepFunction.y[param]; if (command == 4) return int(tokenData[token].sellRateQtyStepFunction.x.length); if (command == 5) return tokenData[token].sellRateQtyStepFunction.x[param]; if (command == 6) return int(tokenData[token].sellRateQtyStepFunction.y.length); if (command == 7) return tokenData[token].sellRateQtyStepFunction.y[param]; if (command == 8) return int(tokenData[token].buyRateImbalanceStepFunction.x.length); if (command == 9) return tokenData[token].buyRateImbalanceStepFunction.x[param]; if (command == 10) return int(tokenData[token].buyRateImbalanceStepFunction.y.length); if (command == 11) return tokenData[token].buyRateImbalanceStepFunction.y[param]; if (command == 12) return int(tokenData[token].sellRateImbalanceStepFunction.x.length); if (command == 13) return tokenData[token].sellRateImbalanceStepFunction.x[param]; if (command == 14) return int(tokenData[token].sellRateImbalanceStepFunction.y.length); if (command == 15) return tokenData[token].sellRateImbalanceStepFunction.y[param]; revert(); } /* solhint-enable code-complexity */ function getRateUpdateBlock(ERC20 token) public view returns(uint) { bytes32 compactData = tokenRatesCompactData[tokenData[token].compactDataArrayIndex]; return getLast4Bytes(compactData); } function getListedTokens() public view returns(ERC20[]) { return listedTokens; } function getTokenQty(ERC20 token, uint ethQty, uint rate) internal view returns(uint) { uint dstDecimals = getDecimals(token); uint srcDecimals = ETH_DECIMALS; return calcDstQty(ethQty, srcDecimals, dstDecimals, rate); } function getLast4Bytes(bytes32 b) internal pure returns(uint) { // cannot trust compiler with not turning bit operations into EXP opcode return uint(b) / (BYTES_14_OFFSET * BYTES_14_OFFSET); } function getRateByteFromCompactData(bytes32 data, ERC20 token, bool buy) internal view returns(int8) { uint fieldOffset = tokenData[token].compactDataFieldIndex; uint byteOffset; if (buy) byteOffset = 32 - NUM_TOKENS_IN_COMPACT_DATA + fieldOffset; else byteOffset = 4 + fieldOffset; return int8(data[byteOffset]); } function executeStepFunction(StepFunction f, int x) internal pure returns(int) { uint len = f.y.length; for (uint ind = 0; ind < len; ind++) { if (x <= f.x[ind]) return f.y[ind]; } return f.y[len-1]; } function addBps(uint rate, int bps) internal pure returns(uint) { require(rate <= MAX_RATE); require(bps >= MIN_BPS_ADJUSTMENT); require(bps <= MAX_BPS_ADJUSTMENT); uint maxBps = 100 * 100; return (rate * uint(int(maxBps) + bps)) / maxBps; } function abs(int x) internal pure returns(uint) { if (x < 0) return uint(-1 * x); else return uint(x); } } contract ConversionRateEnhancedSteps is ConversionRates { uint constant internal MAX_STEPS_IN_FUNCTION = 16; int constant internal MAX_IMBALANCE = 2 ** 255 - 1; uint constant internal POW_2_128 = 2 ** 128; int128 constant internal MAX_STEP_VALUE = 2 ** 127 - 1; int128 constant internal MIN_STEP_VALUE = -1 * 2 ** 127; int constant internal MAX_BPS_ADJUSTMENT = 100 * 100; function ConversionRateEnhancedSteps(address _admin) public ConversionRates(_admin) { } // solhint-disable-line no-empty-blocks // Blocking set qty step func as we won't use function setQtyStepFunction( ERC20, int[], int[], int[], int[] ) public onlyOperator { revert(); } function setImbalanceStepFunction( ERC20 token, int[] xBuy, int[] yBuy, int[] xSell, int[] ySell ) public onlyOperator { require(xBuy.length + 1 == yBuy.length); require(xSell.length + 1 == ySell.length); require(yBuy.length <= MAX_STEPS_IN_FUNCTION); require(ySell.length <= MAX_STEPS_IN_FUNCTION); require(tokenData[token].listed); uint i; if (xBuy.length > 1) { // verify qty are increasing for(i = 0; i < xBuy.length - 1; i++) { require(xBuy[i] < xBuy[i + 1]); } } // only need to check last value as it's sorted array require(xBuy.length == 0 || xBuy[xBuy.length - 1] < MAX_STEP_VALUE); // verify yBuy for(i = 0; i < yBuy.length; i++) { require(yBuy[i] >= MIN_BPS_ADJUSTMENT); require(yBuy[i] <= MAX_BPS_ADJUSTMENT); } if (xSell.length > 1) { // verify qty are increasing for(i = 0; i < xSell.length - 1; i++) { require(xSell[i] < xSell[i + 1]); } } // only need to check last value as it's sorted array require(xSell.length == 0 || xSell[xSell.length - 1] < MAX_STEP_VALUE); // verify ySell for(i = 0; i < ySell.length; i++) { require(ySell[i] >= MIN_BPS_ADJUSTMENT); require(ySell[i] <= MAX_BPS_ADJUSTMENT); } int[] memory buyArray = new int[](yBuy.length); for(i = 0; i < yBuy.length; i++) { int128 xBuyVal = (i == yBuy.length - 1) ? MAX_STEP_VALUE : int128(xBuy[i]); buyArray[i] = encodeStepFunctionData(xBuyVal, int128(yBuy[i])); } int[] memory sellArray = new int[](ySell.length); for(i = 0; i < ySell.length; i++) { int128 xSellVal = (i == ySell.length - 1) ? MAX_STEP_VALUE : int128(xSell[i]); sellArray[i] = encodeStepFunctionData(xSellVal, int128(ySell[i])); } int[] memory emptyArr = new int[](0); tokenData[token].buyRateImbalanceStepFunction = StepFunction(buyArray, emptyArr); tokenData[token].sellRateImbalanceStepFunction = StepFunction(sellArray, emptyArr); } /* solhint-disable code-complexity */ function getStepFunctionData(ERC20 token, uint command, uint param) public view returns(int) { if (command == 8) return int(tokenData[token].buyRateImbalanceStepFunction.x.length - 1); int stepXValue; int stepYValue; if (command == 9) { (stepXValue, stepYValue) = decodeStepFunctionData(tokenData[token].buyRateImbalanceStepFunction.x[param]); return stepXValue; } if (command == 10) return int(tokenData[token].buyRateImbalanceStepFunction.x.length); if (command == 11) { (stepXValue, stepYValue) = decodeStepFunctionData(tokenData[token].buyRateImbalanceStepFunction.x[param]); return stepYValue; } if (command == 12) return int(tokenData[token].sellRateImbalanceStepFunction.x.length - 1); if (command == 13) { (stepXValue, stepYValue) = decodeStepFunctionData(tokenData[token].sellRateImbalanceStepFunction.x[param]); return stepXValue; } if (command == 14) return int(tokenData[token].sellRateImbalanceStepFunction.x.length); if (command == 15) { (stepXValue, stepYValue) = decodeStepFunctionData(tokenData[token].sellRateImbalanceStepFunction.x[param]); return stepYValue; } revert(); } /* solhint-disable function-max-lines */ function getRate(ERC20 token, uint currentBlockNumber, bool buy, uint qty) public view returns(uint) { // check if trade is enabled if (!tokenData[token].enabled) return 0; if (tokenControlInfo[token].minimalRecordResolution == 0) return 0; // token control info not set // get rate update block bytes32 compactData = tokenRatesCompactData[tokenData[token].compactDataArrayIndex]; uint updateRateBlock = getLast4Bytes(compactData); if (currentBlockNumber >= updateRateBlock + validRateDurationInBlocks) return 0; // rate is expired // check imbalance int totalImbalance; int blockImbalance; (totalImbalance, blockImbalance) = getImbalance(token, updateRateBlock, currentBlockNumber); // calculate actual rate int imbalanceQty; int extraBps; int8 rateUpdate; uint rate; if (buy) { // start with base rate rate = tokenData[token].baseBuyRate; // add rate update rateUpdate = getRateByteFromCompactData(compactData, token, true); extraBps = int(rateUpdate) * 10; rate = addBps(rate, extraBps); // compute token qty qty = getTokenQty(token, qty, rate); imbalanceQty = int(qty); // add imbalance overhead extraBps = executeStepFunction( tokenData[token].buyRateImbalanceStepFunction, totalImbalance, totalImbalance + imbalanceQty ); rate = addBps(rate, extraBps); totalImbalance += imbalanceQty; } else { // start with base rate rate = tokenData[token].baseSellRate; // add rate update rateUpdate = getRateByteFromCompactData(compactData, token, false); extraBps = int(rateUpdate) * 10; rate = addBps(rate, extraBps); // compute token qty imbalanceQty = -1 * int(qty); // add imbalance overhead extraBps = executeStepFunction( tokenData[token].sellRateImbalanceStepFunction, totalImbalance + imbalanceQty, totalImbalance ); rate = addBps(rate, extraBps); totalImbalance += imbalanceQty; } if (abs(totalImbalance) >= getMaxTotalImbalance(token)) return 0; if (abs(blockImbalance + imbalanceQty) >= getMaxPerBlockImbalance(token)) return 0; return rate; } // Override function getImbalance to fix #240 function getImbalance(ERC20 token, uint rateUpdateBlock, uint currentBlock) internal view returns(int totalImbalance, int currentBlockImbalance) { int resolution = int(tokenControlInfo[token].minimalRecordResolution); (totalImbalance, currentBlockImbalance) = getImbalanceSinceRateUpdate( token, rateUpdateBlock, currentBlock); if (!checkMultOverflow(totalImbalance, resolution)) { totalImbalance *= resolution; } else { totalImbalance = MAX_IMBALANCE; } if (!checkMultOverflow(currentBlockImbalance, resolution)) { currentBlockImbalance *= resolution; } else { currentBlockImbalance = MAX_IMBALANCE; } } function getImbalancePerToken(ERC20 token, uint whichBlock) public view returns(int totalImbalance, int currentBlockImbalance) { uint rateUpdateBlock = getRateUpdateBlock(token); // if whichBlock = 0, use latest block, otherwise use whichBlock uint usedBlock = whichBlock == 0 ? block.number : whichBlock; return getImbalance(token, rateUpdateBlock, usedBlock); } function executeStepFunction(StepFunction storage f, int from, int to) internal view returns(int) { uint len = f.x.length; if (len == 0 || from == to) { return 0; } int fromVal = from; // avoid modifying function parameters int change = 0; // amount change from initial amount when applying bps for each step int stepXValue; int stepYValue; for(uint ind = 0; ind < len; ind++) { (stepXValue, stepYValue) = decodeStepFunctionData(f.x[ind]); if (stepXValue <= fromVal) { continue; } // if it falls into step with y <= -10000, rate must be 0 if (stepYValue == MIN_BPS_ADJUSTMENT) { return MIN_BPS_ADJUSTMENT; } // from here, from < stepXValue, // if from < to <= stepXValue, take [from, to] and return, else take [from, stepXValue] if (stepXValue >= to) { change += (to - fromVal) * stepYValue; return change / (to - from); } else { change += (stepXValue - fromVal) * stepYValue; fromVal = stepXValue; } } return change / (to - from); } // first 128 bits is value for x, next 128 bits is value for y function encodeStepFunctionData(int128 x, int128 y) internal pure returns(int data) { require(x <= MAX_STEP_VALUE && x >= MIN_STEP_VALUE); require(y <= MAX_STEP_VALUE && y >= MIN_STEP_VALUE); data = int(uint(y) & (POW_2_128 - 1)); data |= int((uint(x) & (POW_2_128 - 1)) * POW_2_128); } function decodeStepFunctionData(int val) internal pure returns (int x, int y) { y = int(int128(uint(val) & (POW_2_128 - 1))); x = int(int128((uint(val) / POW_2_128) & (POW_2_128 - 1))); // default to be max value if (x == int(MAX_STEP_VALUE)) { x = MAX_IMBALANCE; } } function checkMultOverflow(int x, int y) internal pure returns(bool) { if (y == 0) return false; return (((x*y) / y) != x); } }

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{"success": true, "error": null, "results": {"detectors": [{"check": "divide-before-multiply", "impact": "Medium", "confidence": "Medium"}, {"check": "shadowing-state", "impact": "High", "confidence": "High"}, {"check": "incorrect-equality", "impact": "Medium", "confidence": "High"}, {"check": "uninitialized-local", "impact": "Medium", "confidence": "Medium"}]}}

0x71b9983669f9b95647e1a8617d848cb82fd55bc1

pragma solidity 0.4.19; interface ERC20 { function balanceOf(address who) public view returns (uint256); function transfer(address to, uint256 value) public returns (bool); function allowance(address owner, address spender) public view returns (uint256); function transferFrom(address from, address to, uint256 value) public returns (bool); function approve(address spender, uint256 value) public returns (bool); event Transfer(address indexed from, address indexed to, uint256 value); event Approval(address indexed owner, address indexed spender, uint256 value); } library SafeMath { function mul(uint256 a, uint256 b) internal pure returns (uint256) { if (a == 0) { return 0; } uint256 c = a * b; assert(c / a == b); return c; } function div(uint256 a, uint256 b) internal pure returns (uint256) { // assert(b > 0); // Solidity automatically throws when dividing by 0 uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } function sub(uint256 a, uint256 b) internal pure returns (uint256) { assert(b <= a); return a - b; } function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; assert(c >= a); return c; } } contract ShengAnNa is ERC20 { using SafeMath for uint; string internal _name; string internal _symbol; uint8 internal _decimals; uint256 internal _totalSupply; mapping (address => uint256) internal balances; mapping (address => mapping (address => uint256)) internal allowed; function ShengAnNa(string name, string symbol, uint8 decimals, uint256 totalSupply) public { _symbol = symbol; _name = name; _decimals = decimals; _totalSupply = totalSupply; balances[msg.sender] = totalSupply; } function name() public view returns (string) { return _name; } function symbol() public view returns (string) { return _symbol; } function decimals() public view returns (uint8) { return _decimals; } function totalSupply() public view returns (uint256) { return _totalSupply; } function transfer(address _to, uint256 _value) public returns (bool) { require(_to != address(0)); require(_value <= balances[msg.sender]); balances[msg.sender] = SafeMath.sub(balances[msg.sender], _value); balances[_to] = SafeMath.add(balances[_to], _value); Transfer(msg.sender, _to, _value); return true; } function balanceOf(address _owner) public view returns (uint256 balance) { return balances[_owner]; } function transferFrom(address _from, address _to, uint256 _value) public returns (bool) { require(_to != address(0)); require(_value <= balances[_from]); require(_value <= allowed[_from][msg.sender]); balances[_from] = SafeMath.sub(balances[_from], _value); balances[_to] = SafeMath.add(balances[_to], _value); allowed[_from][msg.sender] = SafeMath.sub(allowed[_from][msg.sender], _value); Transfer(_from, _to, _value); return true; } function approve(address _spender, uint256 _value) public returns (bool) { allowed[msg.sender][_spender] = _value; Approval(msg.sender, _spender, _value); return true; } function allowance(address _owner, address _spender) public view returns (uint256) { return allowed[_owner][_spender]; } function increaseApproval(address _spender, uint _addedValue) public returns (bool) { allowed[msg.sender][_spender] = SafeMath.add(allowed[msg.sender][_spender], _addedValue); Approval(msg.sender, _spender, allowed[msg.sender][_spender]); return true; } function decreaseApproval(address _spender, uint _subtractedValue) public returns (bool) { uint oldValue = allowed[msg.sender][_spender]; if (_subtractedValue > oldValue) { allowed[msg.sender][_spender] = 0; } else { allowed[msg.sender][_spender] = SafeMath.sub(oldValue, _subtractedValue); } Approval(msg.sender, _spender, allowed[msg.sender][_spender]); return true; } }

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0x71c10040Db9B5Bf6d5Bdd81DAC26B47bb44eB4f0

pragma solidity 0.6.2; library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // This method relies in extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. uint256 size; // solhint-disable-next-line no-inline-assembly assembly { size := extcodesize(account) } return size > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain`call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return _functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); return _functionCallWithValue(target, data, value, errorMessage); } function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) { require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: weiValue }(data); if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } abstract contract Context { function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } contract Migrations { address public owner = msg.sender; uint public last_completed_migration; modifier restricted() { require( msg.sender == owner, "This function is restricted to the contract's owner" ); _; } function setCompleted(uint completed) public restricted { last_completed_migration = completed; } } contract Ownable is Context { address private _owner; event OwnershipTransferred( address indexed previousOwner, address indexed newOwner ); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor() internal { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), msgSender); } /** * @dev Returns the address of the current owner. */ function owner() public view returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(_owner == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { emit OwnershipTransferred(_owner, address(0)); _owner = address(0); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require( newOwner != address(0), "Ownable: new owner is the zero address" ); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } } library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } contract ERC20 is Context, IERC20 { using SafeMath for uint256; using Address for address; mapping(address => uint256) private _balances; mapping(address => mapping(address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; uint8 private _decimals; /** * @dev Sets the values for {name} and {symbol}, initializes {decimals} with * a default value of 18. * * To select a different value for {decimals}, use {_setupDecimals}. * * All three of these values are immutable: they can only be set once during * construction. */ constructor(string memory name, string memory symbol) public { _name = name; _symbol = symbol; _decimals = 18; } /** * @dev Returns the name of the token. */ function name() public view returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5,05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is * called. * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view returns (uint8) { return _decimals; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public override view returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public override view returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `recipient` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address recipient, uint256 amount) public virtual override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public virtual override view returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { _approve(_msgSender(), spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}; * * Requirements: * - `sender` and `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. * - the caller must have allowance for ``sender``'s tokens of at least * `amount`. */ function transferFrom( address sender, address recipient, uint256 amount ) public virtual override returns (bool) { _transfer(sender, recipient, amount); _approve( sender, _msgSender(), _allowances[sender][_msgSender()].sub( amount, "ERC20: transfer amount exceeds allowance" ) ); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { _approve( _msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue) ); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { _approve( _msgSender(), spender, _allowances[_msgSender()][spender].sub( subtractedValue, "ERC20: decreased allowance below zero" ) ); return true; } /** * @dev Moves tokens `amount` from `sender` to `recipient`. * * This is internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `sender` cannot be the zero address. * - `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. */ function _transfer( address sender, address recipient, uint256 amount ) internal virtual { require(sender != address(0), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(sender, recipient, amount); _balances[sender] = _balances[sender].sub( amount, "ERC20: transfer amount exceeds balance" ); _balances[recipient] = _balances[recipient].add(amount); emit Transfer(sender, recipient, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements * * - `to` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply = _totalSupply.add(amount); _balances[account] = _balances[account].add(amount); emit Transfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); _balances[account] = _balances[account].sub( amount, "ERC20: burn amount exceeds balance" ); _totalSupply = _totalSupply.sub(amount); emit Transfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens. * * This internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve( address owner, address spender, uint256 amount ) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Sets {decimals} to a value other than the default one of 18. * * WARNING: This function should only be called from the constructor. Most * applications that interact with token contracts will not expect * {decimals} to ever change, and may work incorrectly if it does. */ function _setupDecimals(uint8 decimals_) internal { _decimals = decimals_; } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be to transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer( address from, address to, uint256 amount ) internal virtual {} } contract WrappedPolis is ERC20("WrappedPolis", "WPOLIS"), Ownable { event Burned(address indexed burner, uint256 burnAmount); event Minted( address indexed minter, address indexed receiver, uint256 mintAmount ); function mint(address _to, uint256 _amount) public onlyOwner { _mint(_to, _amount); emit Minted(owner(), _to, _amount); } function burn(uint256 _amount) public { _burn(msg.sender, _amount); emit Burned(msg.sender, _amount); } }

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0x71C8dc1d6315a48850E88530d18d3a97505d2065

pragma solidity 0.6.12; pragma experimental ABIEncoderV2; contract DSAuthEvents { event LogSetAuthority(address indexed authority); event LogSetOwner(address indexed owner); } contract DSAuth is DSAuthEvents { DSAuthority public authority; address public owner; constructor() public { owner = msg.sender; emit LogSetOwner(msg.sender); } function setOwner(address owner_) public auth { owner = owner_; emit LogSetOwner(owner); } function setAuthority(DSAuthority authority_) public auth { authority = authority_; emit LogSetAuthority(address(authority)); } modifier auth { require(isAuthorized(msg.sender, msg.sig)); _; } function isAuthorized(address src, bytes4 sig) internal view returns (bool) { if (src == address(this)) { return true; } else if (src == owner) { return true; } else if (authority == DSAuthority(0)) { return false; } else { return authority.canCall(src, address(this), sig); } } } abstract contract DSAuthority { function canCall(address src, address dst, bytes4 sig) public virtual view returns (bool); } abstract contract DSGuard { function canCall(address src_, address dst_, bytes4 sig) public view virtual returns (bool); function permit(bytes32 src, bytes32 dst, bytes32 sig) public virtual; function forbid(bytes32 src, bytes32 dst, bytes32 sig) public virtual; function permit(address src, address dst, bytes32 sig) public virtual; function forbid(address src, address dst, bytes32 sig) public virtual; } abstract contract DSGuardFactory { function newGuard() public virtual returns (DSGuard guard); } contract DSMath { function add(uint256 x, uint256 y) internal pure returns (uint256 z) { require((z = x + y) >= x); } function sub(uint256 x, uint256 y) internal pure returns (uint256 z) { require((z = x - y) <= x); } function mul(uint256 x, uint256 y) internal pure returns (uint256 z) { require(y == 0 || (z = x * y) / y == x); } function div(uint256 x, uint256 y) internal pure returns (uint256 z) { return x / y; } function min(uint256 x, uint256 y) internal pure returns (uint256 z) { return x <= y ? x : y; } function max(uint256 x, uint256 y) internal pure returns (uint256 z) { return x >= y ? x : y; } function imin(int256 x, int256 y) internal pure returns (int256 z) { return x <= y ? x : y; } function imax(int256 x, int256 y) internal pure returns (int256 z) { return x >= y ? x : y; } uint256 constant WAD = 10**18; uint256 constant RAY = 10**27; function wmul(uint256 x, uint256 y) internal pure returns (uint256 z) { z = add(mul(x, y), WAD / 2) / WAD; } function rmul(uint256 x, uint256 y) internal pure returns (uint256 z) { z = add(mul(x, y), RAY / 2) / RAY; } function wdiv(uint256 x, uint256 y) internal pure returns (uint256 z) { z = add(mul(x, WAD), y / 2) / y; } function rdiv(uint256 x, uint256 y) internal pure returns (uint256 z) { z = add(mul(x, RAY), y / 2) / y; } // This famous algorithm is called "exponentiation by squaring" // and calculates x^n with x as fixed-point and n as regular unsigned. // // It's O(log n), instead of O(n) for naive repeated multiplication. // // These facts are why it works: // // If n is even, then x^n = (x^2)^(n/2). // If n is odd, then x^n = x * x^(n-1), // and applying the equation for even x gives // x^n = x * (x^2)^((n-1) / 2). // // Also, EVM division is flooring and // floor[(n-1) / 2] = floor[n / 2]. // function rpow(uint256 x, uint256 n) internal pure returns (uint256 z) { z = n % 2 != 0 ? x : RAY; for (n /= 2; n != 0; n /= 2) { x = rmul(x, x); if (n % 2 != 0) { z = rmul(z, x); } } } } contract DSNote { event LogNote( bytes4 indexed sig, address indexed guy, bytes32 indexed foo, bytes32 indexed bar, uint256 wad, bytes fax ) anonymous; modifier note { bytes32 foo; bytes32 bar; assembly { foo := calldataload(4) bar := calldataload(36) } emit LogNote(msg.sig, msg.sender, foo, bar, msg.value, msg.data); _; } } abstract contract DSProxy is DSAuth, DSNote { DSProxyCache public cache; // global cache for contracts constructor(address _cacheAddr) public { require(setCache(_cacheAddr)); } // solhint-disable-next-line no-empty-blocks receive() external payable {} // use the proxy to execute calldata _data on contract _code // function execute(bytes memory _code, bytes memory _data) // public // payable // virtual // returns (address target, bytes32 response); function execute(address _target, bytes memory _data) public payable virtual returns (bytes32 response); //set new cache function setCache(address _cacheAddr) public virtual payable returns (bool); } contract DSProxyCache { mapping(bytes32 => address) cache; function read(bytes memory _code) public view returns (address) { bytes32 hash = keccak256(_code); return cache[hash]; } function write(bytes memory _code) public returns (address target) { assembly { target := create(0, add(_code, 0x20), mload(_code)) switch iszero(extcodesize(target)) case 1 { // throw if contract failed to deploy revert(0, 0) } } bytes32 hash = keccak256(_code); cache[hash] = target; } } abstract contract DSProxyFactoryInterface { function build(address owner) public virtual returns (DSProxy proxy); } contract AaveHelper is DSMath { using SafeERC20 for ERC20; address payable public constant WALLET_ADDR = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; address public constant DISCOUNT_ADDR = 0x1b14E8D511c9A4395425314f849bD737BAF8208F; uint public constant MANUAL_SERVICE_FEE = 400; // 0.25% Fee uint public constant AUTOMATIC_SERVICE_FEE = 333; // 0.3% Fee address public constant BOT_REGISTRY_ADDRESS = 0x637726f8b08a7ABE3aE3aCaB01A80E2d8ddeF77B; address public constant ETH_ADDR = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant AAVE_LENDING_POOL_ADDRESSES = 0x24a42fD28C976A61Df5D00D0599C34c4f90748c8; uint public constant NINETY_NINE_PERCENT_WEI = 990000000000000000; uint16 public constant AAVE_REFERRAL_CODE = 64; /// @param _collateralAddress underlying token address /// @param _user users address function getMaxCollateral(address _collateralAddress, address _user) public view returns (uint256) { address lendingPoolAddressDataProvider = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolDataProvider(); address lendingPoolCoreAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); uint256 pow10 = 10 ** (18 - _getDecimals(_collateralAddress)); // fetch all needed data (,uint256 totalCollateralETH, uint256 totalBorrowsETH,,uint256 currentLTV,,,) = ILendingPool(lendingPoolAddressDataProvider).calculateUserGlobalData(_user); (,uint256 tokenLTV,,) = ILendingPool(lendingPoolCoreAddress).getReserveConfiguration(_collateralAddress); uint256 collateralPrice = IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_collateralAddress); uint256 userTokenBalance = ILendingPool(lendingPoolCoreAddress).getUserUnderlyingAssetBalance(_collateralAddress, _user); uint256 userTokenBalanceEth = wmul(userTokenBalance * pow10, collateralPrice); // if borrow is 0, return whole user balance if (totalBorrowsETH == 0) { return userTokenBalance; } uint256 maxCollateralEth = div(sub(mul(currentLTV, totalCollateralETH), mul(totalBorrowsETH, 100)), currentLTV); /// @dev final amount can't be higher than users token balance maxCollateralEth = maxCollateralEth > userTokenBalanceEth ? userTokenBalanceEth : maxCollateralEth; // might happen due to wmul precision if (maxCollateralEth >= totalCollateralETH) { return wdiv(totalCollateralETH, collateralPrice) / pow10; } // get sum of all other reserves multiplied with their liquidation thresholds by reversing formula uint256 a = sub(wmul(currentLTV, totalCollateralETH), wmul(tokenLTV, userTokenBalanceEth)); // add new collateral amount multiplied by its threshold, and then divide with new total collateral uint256 newLiquidationThreshold = wdiv(add(a, wmul(sub(userTokenBalanceEth, maxCollateralEth), tokenLTV)), sub(totalCollateralETH, maxCollateralEth)); // if new threshold is lower than first one, calculate new max collateral with newLiquidationThreshold if (newLiquidationThreshold < currentLTV) { maxCollateralEth = div(sub(mul(newLiquidationThreshold, totalCollateralETH), mul(totalBorrowsETH, 100)), newLiquidationThreshold); maxCollateralEth = maxCollateralEth > userTokenBalanceEth ? userTokenBalanceEth : maxCollateralEth; } return wmul(wdiv(maxCollateralEth, collateralPrice) / pow10, NINETY_NINE_PERCENT_WEI); } /// @param _borrowAddress underlying token address /// @param _user users address function getMaxBorrow(address _borrowAddress, address _user) public view returns (uint256) { address lendingPoolAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); (,,,,uint256 availableBorrowsETH,,,) = ILendingPool(lendingPoolAddress).getUserAccountData(_user); uint256 borrowPrice = IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_borrowAddress); return wmul(wdiv(availableBorrowsETH, borrowPrice) / (10 ** (18 - _getDecimals(_borrowAddress))), NINETY_NINE_PERCENT_WEI); } function getMaxBoost(address _borrowAddress, address _collateralAddress, address _user) public view returns (uint256) { address lendingPoolAddressDataProvider = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolDataProvider(); address lendingPoolCoreAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); (,uint256 totalCollateralETH, uint256 totalBorrowsETH,,uint256 currentLTV,,,) = ILendingPool(lendingPoolAddressDataProvider).calculateUserGlobalData(_user); (,uint256 tokenLTV,,) = ILendingPool(lendingPoolCoreAddress).getReserveConfiguration(_collateralAddress); totalCollateralETH = div(mul(totalCollateralETH, currentLTV), 100); uint256 availableBorrowsETH = wmul(mul(div(sub(totalCollateralETH, totalBorrowsETH), sub(100, tokenLTV)), 100), NINETY_NINE_PERCENT_WEI); uint256 borrowPrice = IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_borrowAddress); return wdiv(availableBorrowsETH, borrowPrice) / (10 ** (18 - _getDecimals(_borrowAddress))); } /// @notice Calculates the fee amount /// @param _amount Amount that is converted /// @param _user Actuall user addr not DSProxy /// @param _gasCost Ether amount of gas we are spending for tx /// @param _tokenAddr token addr. of token we are getting for the fee /// @return feeAmount The amount we took for the fee function getFee(uint _amount, address _user, uint _gasCost, address _tokenAddr) internal returns (uint feeAmount) { address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); uint fee = MANUAL_SERVICE_FEE; if (BotRegistry(BOT_REGISTRY_ADDRESS).botList(tx.origin)) { fee = AUTOMATIC_SERVICE_FEE; } if (Discount(DISCOUNT_ADDR).isCustomFeeSet(_user)) { fee = Discount(DISCOUNT_ADDR).getCustomServiceFee(_user); } feeAmount = (fee == 0) ? 0 : (_amount / fee); if (_gasCost != 0) { uint256 price = IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_tokenAddr); _gasCost = wdiv(_gasCost, price) / (10 ** (18 - _getDecimals(_tokenAddr))); feeAmount = add(feeAmount, _gasCost); } // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } if (_tokenAddr == ETH_ADDR) { WALLET_ADDR.transfer(feeAmount); } else { ERC20(_tokenAddr).safeTransfer(WALLET_ADDR, feeAmount); } } /// @notice Calculates the gas cost for transaction /// @param _amount Amount that is converted /// @param _user Actuall user addr not DSProxy /// @param _gasCost Ether amount of gas we are spending for tx /// @param _tokenAddr token addr. of token we are getting for the fee /// @return gasCost The amount we took for the gas cost function getGasCost(uint _amount, address _user, uint _gasCost, address _tokenAddr) internal returns (uint gasCost) { address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); if (_gasCost != 0) { uint256 price = IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_tokenAddr); _gasCost = wmul(_gasCost, price); gasCost = _gasCost; } // fee can't go over 20% of the whole amount if (gasCost > (_amount / 5)) { gasCost = _amount / 5; } if (_tokenAddr == ETH_ADDR) { WALLET_ADDR.transfer(gasCost); } else { ERC20(_tokenAddr).safeTransfer(WALLET_ADDR, gasCost); } } /// @notice Returns the owner of the DSProxy that called the contract function getUserAddress() internal view returns (address) { DSProxy proxy = DSProxy(payable(address(this))); return proxy.owner(); } /// @notice Approves token contract to pull underlying tokens from the DSProxy /// @param _tokenAddr Token we are trying to approve /// @param _caller Address which will gain the approval function approveToken(address _tokenAddr, address _caller) internal { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeApprove(_caller, uint256(-1)); } } /// @notice Send specific amount from contract to specific user /// @param _token Token we are trying to send /// @param _user User that should receive funds /// @param _amount Amount that should be sent function sendContractBalance(address _token, address _user, uint _amount) public { if (_amount == 0) return; if (_token == ETH_ADDR) { payable(_user).transfer(_amount); } else { ERC20(_token).safeTransfer(_user, _amount); } } function sendFullContractBalance(address _token, address _user) public { if (_token == ETH_ADDR) { sendContractBalance(_token, _user, address(this).balance); } else { sendContractBalance(_token, _user, ERC20(_token).balanceOf(address(this))); } } function _getDecimals(address _token) internal view returns (uint256) { if (_token == ETH_ADDR) return 18; return ERC20(_token).decimals(); } } contract AaveSafetyRatio is AaveHelper { function getSafetyRatio(address _user) public view returns(uint256) { address lendingPoolAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); (,,uint256 totalBorrowsETH,,uint256 availableBorrowsETH,,,) = ILendingPool(lendingPoolAddress).getUserAccountData(_user); if (totalBorrowsETH == 0) return uint256(0); return wdiv(add(totalBorrowsETH, availableBorrowsETH), totalBorrowsETH); } } contract AdminAuth { using SafeERC20 for ERC20; address public owner; address public admin; modifier onlyOwner() { require(owner == msg.sender); _; } constructor() public { owner = msg.sender; } /// @notice Admin is set by owner first time, after that admin is super role and has permission to change owner /// @param _admin Address of multisig that becomes admin function setAdminByOwner(address _admin) public { require(msg.sender == owner); require(admin == address(0)); admin = _admin; } /// @notice Admin is able to set new admin /// @param _admin Address of multisig that becomes new admin function setAdminByAdmin(address _admin) public { require(msg.sender == admin); admin = _admin; } /// @notice Admin is able to change owner /// @param _owner Address of new owner function setOwnerByAdmin(address _owner) public { require(msg.sender == admin); owner = _owner; } /// @notice Destroy the contract function kill() public onlyOwner { selfdestruct(payable(owner)); } /// @notice withdraw stuck funds function withdrawStuckFunds(address _token, uint _amount) public onlyOwner { if (_token == 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE) { payable(owner).transfer(_amount); } else { ERC20(_token).safeTransfer(owner, _amount); } } } contract Auth is AdminAuth { bool public ALL_AUTHORIZED = false; mapping(address => bool) public authorized; modifier onlyAuthorized() { require(ALL_AUTHORIZED || authorized[msg.sender]); _; } constructor() public { authorized[msg.sender] = true; } function setAuthorized(address _user, bool _approved) public onlyOwner { authorized[_user] = _approved; } function setAllAuthorized(bool _authorized) public onlyOwner { ALL_AUTHORIZED = _authorized; } } contract ProxyPermission { address public constant FACTORY_ADDRESS = 0x5a15566417e6C1c9546523066500bDDBc53F88C7; /// @notice Called in the context of DSProxy to authorize an address /// @param _contractAddr Address which will be authorized function givePermission(address _contractAddr) public { address currAuthority = address(DSAuth(address(this)).authority()); DSGuard guard = DSGuard(currAuthority); if (currAuthority == address(0)) { guard = DSGuardFactory(FACTORY_ADDRESS).newGuard(); DSAuth(address(this)).setAuthority(DSAuthority(address(guard))); } guard.permit(_contractAddr, address(this), bytes4(keccak256("execute(address,bytes)"))); } /// @notice Called in the context of DSProxy to remove authority of an address /// @param _contractAddr Auth address which will be removed from authority list function removePermission(address _contractAddr) public { address currAuthority = address(DSAuth(address(this)).authority()); // if there is no authority, that means that contract doesn't have permission if (currAuthority == address(0)) { return; } DSGuard guard = DSGuard(currAuthority); guard.forbid(_contractAddr, address(this), bytes4(keccak256("execute(address,bytes)"))); } function proxyOwner() internal returns(address) { return DSAuth(address(this)).owner(); } } contract CompoundMonitorProxy is AdminAuth { using SafeERC20 for ERC20; uint public CHANGE_PERIOD; address public monitor; address public newMonitor; address public lastMonitor; uint public changeRequestedTimestamp; mapping(address => bool) public allowed; event MonitorChangeInitiated(address oldMonitor, address newMonitor); event MonitorChangeCanceled(); event MonitorChangeFinished(address monitor); event MonitorChangeReverted(address monitor); // if someone who is allowed become malicious, owner can't be changed modifier onlyAllowed() { require(allowed[msg.sender] || msg.sender == owner); _; } modifier onlyMonitor() { require (msg.sender == monitor); _; } constructor(uint _changePeriod) public { CHANGE_PERIOD = _changePeriod * 1 days; } /// @notice Only monitor contract is able to call execute on users proxy /// @param _owner Address of cdp owner (users DSProxy address) /// @param _compoundSaverProxy Address of CompoundSaverProxy /// @param _data Data to send to CompoundSaverProxy function callExecute(address _owner, address _compoundSaverProxy, bytes memory _data) public payable onlyMonitor { // execute reverts if calling specific method fails DSProxyInterface(_owner).execute{value: msg.value}(_compoundSaverProxy, _data); // return if anything left if (address(this).balance > 0) { msg.sender.transfer(address(this).balance); } } /// @notice Allowed users are able to set Monitor contract without any waiting period first time /// @param _monitor Address of Monitor contract function setMonitor(address _monitor) public onlyAllowed { require(monitor == address(0)); monitor = _monitor; } /// @notice Allowed users are able to start procedure for changing monitor /// @dev after CHANGE_PERIOD needs to call confirmNewMonitor to actually make a change /// @param _newMonitor address of new monitor function changeMonitor(address _newMonitor) public onlyAllowed { require(changeRequestedTimestamp == 0); changeRequestedTimestamp = now; lastMonitor = monitor; newMonitor = _newMonitor; emit MonitorChangeInitiated(lastMonitor, newMonitor); } /// @notice At any point allowed users are able to cancel monitor change function cancelMonitorChange() public onlyAllowed { require(changeRequestedTimestamp > 0); changeRequestedTimestamp = 0; newMonitor = address(0); emit MonitorChangeCanceled(); } /// @notice Anyone is able to confirm new monitor after CHANGE_PERIOD if process is started function confirmNewMonitor() public onlyAllowed { require((changeRequestedTimestamp + CHANGE_PERIOD) < now); require(changeRequestedTimestamp != 0); require(newMonitor != address(0)); monitor = newMonitor; newMonitor = address(0); changeRequestedTimestamp = 0; emit MonitorChangeFinished(monitor); } /// @notice Its possible to revert monitor to last used monitor function revertMonitor() public onlyAllowed { require(lastMonitor != address(0)); monitor = lastMonitor; emit MonitorChangeReverted(monitor); } /// @notice Allowed users are able to add new allowed user /// @param _user Address of user that will be allowed function addAllowed(address _user) public onlyAllowed { allowed[_user] = true; } /// @notice Allowed users are able to remove allowed user /// @dev owner is always allowed even if someone tries to remove it from allowed mapping /// @param _user Address of allowed user function removeAllowed(address _user) public onlyAllowed { allowed[_user] = false; } function setChangePeriod(uint _periodInDays) public onlyAllowed { require(_periodInDays * 1 days > CHANGE_PERIOD); CHANGE_PERIOD = _periodInDays * 1 days; } /// @notice In case something is left in contract, owner is able to withdraw it /// @param _token address of token to withdraw balance function withdrawToken(address _token) public onlyOwner { uint balance = ERC20(_token).balanceOf(address(this)); ERC20(_token).safeTransfer(msg.sender, balance); } /// @notice In case something is left in contract, owner is able to withdraw it function withdrawEth() public onlyOwner { uint balance = address(this).balance; msg.sender.transfer(balance); } } contract CompoundSubscriptions is AdminAuth { struct CompoundHolder { address user; uint128 minRatio; uint128 maxRatio; uint128 optimalRatioBoost; uint128 optimalRatioRepay; bool boostEnabled; } struct SubPosition { uint arrPos; bool subscribed; } CompoundHolder[] public subscribers; mapping (address => SubPosition) public subscribersPos; uint public changeIndex; event Subscribed(address indexed user); event Unsubscribed(address indexed user); event Updated(address indexed user); event ParamUpdates(address indexed user, uint128, uint128, uint128, uint128, bool); /// @dev Called by the DSProxy contract which owns the Compound position /// @notice Adds the users Compound poistion in the list of subscriptions so it can be monitored /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalBoost Ratio amount which boost should target /// @param _optimalRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled function subscribe(uint128 _minRatio, uint128 _maxRatio, uint128 _optimalBoost, uint128 _optimalRepay, bool _boostEnabled) external { // if boost is not enabled, set max ratio to max uint uint128 localMaxRatio = _boostEnabled ? _maxRatio : uint128(-1); require(checkParams(_minRatio, localMaxRatio), "Must be correct params"); SubPosition storage subInfo = subscribersPos[msg.sender]; CompoundHolder memory subscription = CompoundHolder({ minRatio: _minRatio, maxRatio: localMaxRatio, optimalRatioBoost: _optimalBoost, optimalRatioRepay: _optimalRepay, user: msg.sender, boostEnabled: _boostEnabled }); changeIndex++; if (subInfo.subscribed) { subscribers[subInfo.arrPos] = subscription; emit Updated(msg.sender); emit ParamUpdates(msg.sender, _minRatio, localMaxRatio, _optimalBoost, _optimalRepay, _boostEnabled); } else { subscribers.push(subscription); subInfo.arrPos = subscribers.length - 1; subInfo.subscribed = true; emit Subscribed(msg.sender); } } /// @notice Called by the users DSProxy /// @dev Owner who subscribed cancels his subscription function unsubscribe() external { _unsubscribe(msg.sender); } /// @dev Checks limit if minRatio is bigger than max /// @param _minRatio Minimum ratio, bellow which repay can be triggered /// @param _maxRatio Maximum ratio, over which boost can be triggered /// @return Returns bool if the params are correct function checkParams(uint128 _minRatio, uint128 _maxRatio) internal pure returns (bool) { if (_minRatio > _maxRatio) { return false; } return true; } /// @dev Internal method to remove a subscriber from the list /// @param _user The actual address that owns the Compound position function _unsubscribe(address _user) internal { require(subscribers.length > 0, "Must have subscribers in the list"); SubPosition storage subInfo = subscribersPos[_user]; require(subInfo.subscribed, "Must first be subscribed"); address lastOwner = subscribers[subscribers.length - 1].user; SubPosition storage subInfo2 = subscribersPos[lastOwner]; subInfo2.arrPos = subInfo.arrPos; subscribers[subInfo.arrPos] = subscribers[subscribers.length - 1]; subscribers.pop(); // remove last element and reduce arr length changeIndex++; subInfo.subscribed = false; subInfo.arrPos = 0; emit Unsubscribed(msg.sender); } /// @dev Checks if the user is subscribed /// @param _user The actual address that owns the Compound position /// @return If the user is subscribed function isSubscribed(address _user) public view returns (bool) { SubPosition storage subInfo = subscribersPos[_user]; return subInfo.subscribed; } /// @dev Returns subscribtion information about a user /// @param _user The actual address that owns the Compound position /// @return Subscription information about the user if exists function getHolder(address _user) public view returns (CompoundHolder memory) { SubPosition storage subInfo = subscribersPos[_user]; return subscribers[subInfo.arrPos]; } /// @notice Helper method to return all the subscribed CDPs /// @return List of all subscribers function getSubscribers() public view returns (CompoundHolder[] memory) { return subscribers; } /// @notice Helper method for the frontend, returns all the subscribed CDPs paginated /// @param _page What page of subscribers you want /// @param _perPage Number of entries per page /// @return List of all subscribers for that page function getSubscribersByPage(uint _page, uint _perPage) public view returns (CompoundHolder[] memory) { CompoundHolder[] memory holders = new CompoundHolder[](_perPage); uint start = _page * _perPage; uint end = start + _perPage; end = (end > holders.length) ? holders.length : end; uint count = 0; for (uint i = start; i < end; i++) { holders[count] = subscribers[i]; count++; } return holders; } ////////////// ADMIN METHODS /////////////////// /// @notice Admin function to unsubscribe a CDP /// @param _user The actual address that owns the Compound position function unsubscribeByAdmin(address _user) public onlyOwner { SubPosition storage subInfo = subscribersPos[_user]; if (subInfo.subscribed) { _unsubscribe(_user); } } } contract CompoundSubscriptionsProxy is ProxyPermission { address public constant COMPOUND_SUBSCRIPTION_ADDRESS = 0x52015EFFD577E08f498a0CCc11905925D58D6207; address public constant COMPOUND_MONITOR_PROXY = 0xB1cF8DE8e791E4Ed1Bd86c03E2fc1f14389Cb10a; /// @notice Calls subscription contract and creates a DSGuard if non existent /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalRatioBoost Ratio amount which boost should target /// @param _optimalRatioRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled function subscribe( uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled ) public { givePermission(COMPOUND_MONITOR_PROXY); ICompoundSubscription(COMPOUND_SUBSCRIPTION_ADDRESS).subscribe( _minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled); } /// @notice Calls subscription contract and updated existing parameters /// @dev If subscription is non existent this will create one /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalRatioBoost Ratio amount which boost should target /// @param _optimalRatioRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled function update( uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled ) public { ICompoundSubscription(COMPOUND_SUBSCRIPTION_ADDRESS).subscribe(_minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled); } /// @notice Calls the subscription contract to unsubscribe the caller function unsubscribe() public { removePermission(COMPOUND_MONITOR_PROXY); ICompoundSubscription(COMPOUND_SUBSCRIPTION_ADDRESS).unsubscribe(); } } contract CompoundCreateTaker is ProxyPermission { using SafeERC20 for ERC20; address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); // solhint-disable-next-line const-name-snakecase DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); struct CreateInfo { address cCollAddress; address cBorrowAddress; uint depositAmount; } /// @notice Main function which will take a FL and open a leverage position /// @dev Call through DSProxy, if _exchangeData.destAddr is a token approve DSProxy /// @param _createInfo [cCollAddress, cBorrowAddress, depositAmount] /// @param _exchangeData Exchange data struct function openLeveragedLoan( CreateInfo memory _createInfo, SaverExchangeCore.ExchangeData memory _exchangeData, address payable _compReceiver ) public payable { uint loanAmount = _exchangeData.srcAmount; // Pull tokens from user if (_exchangeData.destAddr != ETH_ADDRESS) { ERC20(_exchangeData.destAddr).safeTransferFrom(msg.sender, address(this), _createInfo.depositAmount); } else { require(msg.value >= _createInfo.depositAmount, "Must send correct amount of eth"); } // Send tokens to FL receiver sendDeposit(_compReceiver, _exchangeData.destAddr); // Pack the struct data (uint[4] memory numData, address[6] memory cAddresses, bytes memory callData) = _packData(_createInfo, _exchangeData); bytes memory paramsData = abi.encode(numData, cAddresses, callData, address(this)); givePermission(_compReceiver); lendingPool.flashLoan(_compReceiver, _exchangeData.srcAddr, loanAmount, paramsData); removePermission(_compReceiver); logger.Log(address(this), msg.sender, "CompoundLeveragedLoan", abi.encode(_exchangeData.srcAddr, _exchangeData.destAddr, _exchangeData.srcAmount, _exchangeData.destAmount)); } function sendDeposit(address payable _compoundReceiver, address _token) internal { if (_token != ETH_ADDRESS) { ERC20(_token).safeTransfer(_compoundReceiver, ERC20(_token).balanceOf(address(this))); } _compoundReceiver.transfer(address(this).balance); } function _packData( CreateInfo memory _createInfo, SaverExchangeCore.ExchangeData memory exchangeData ) internal pure returns (uint[4] memory numData, address[6] memory cAddresses, bytes memory callData) { numData = [ exchangeData.srcAmount, exchangeData.destAmount, exchangeData.minPrice, exchangeData.price0x ]; cAddresses = [ _createInfo.cCollAddress, _createInfo.cBorrowAddress, exchangeData.srcAddr, exchangeData.destAddr, exchangeData.exchangeAddr, exchangeData.wrapper ]; callData = exchangeData.callData; } } contract CarefulMath { /** * @dev Possible error codes that we can return */ enum MathError { NO_ERROR, DIVISION_BY_ZERO, INTEGER_OVERFLOW, INTEGER_UNDERFLOW } /** * @dev Multiplies two numbers, returns an error on overflow. */ function mulUInt(uint a, uint b) internal pure returns (MathError, uint) { if (a == 0) { return (MathError.NO_ERROR, 0); } uint c = a * b; if (c / a != b) { return (MathError.INTEGER_OVERFLOW, 0); } else { return (MathError.NO_ERROR, c); } } /** * @dev Integer division of two numbers, truncating the quotient. */ function divUInt(uint a, uint b) internal pure returns (MathError, uint) { if (b == 0) { return (MathError.DIVISION_BY_ZERO, 0); } return (MathError.NO_ERROR, a / b); } /** * @dev Subtracts two numbers, returns an error on overflow (i.e. if subtrahend is greater than minuend). */ function subUInt(uint a, uint b) internal pure returns (MathError, uint) { if (b <= a) { return (MathError.NO_ERROR, a - b); } else { return (MathError.INTEGER_UNDERFLOW, 0); } } /** * @dev Adds two numbers, returns an error on overflow. */ function addUInt(uint a, uint b) internal pure returns (MathError, uint) { uint c = a + b; if (c >= a) { return (MathError.NO_ERROR, c); } else { return (MathError.INTEGER_OVERFLOW, 0); } } /** * @dev add a and b and then subtract c */ function addThenSubUInt(uint a, uint b, uint c) internal pure returns (MathError, uint) { (MathError err0, uint sum) = addUInt(a, b); if (err0 != MathError.NO_ERROR) { return (err0, 0); } return subUInt(sum, c); } } contract Exponential is CarefulMath { uint constant expScale = 1e18; uint constant doubleScale = 1e36; uint constant halfExpScale = expScale/2; uint constant mantissaOne = expScale; struct Exp { uint mantissa; } struct Double { uint mantissa; } /** * @dev Creates an exponential from numerator and denominator values. * Note: Returns an error if (`num` * 10e18) > MAX_INT, * or if `denom` is zero. */ function getExp(uint num, uint denom) pure internal returns (MathError, Exp memory) { (MathError err0, uint scaledNumerator) = mulUInt(num, expScale); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } (MathError err1, uint rational) = divUInt(scaledNumerator, denom); if (err1 != MathError.NO_ERROR) { return (err1, Exp({mantissa: 0})); } return (MathError.NO_ERROR, Exp({mantissa: rational})); } /** * @dev Adds two exponentials, returning a new exponential. */ function addExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) { (MathError error, uint result) = addUInt(a.mantissa, b.mantissa); return (error, Exp({mantissa: result})); } /** * @dev Subtracts two exponentials, returning a new exponential. */ function subExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) { (MathError error, uint result) = subUInt(a.mantissa, b.mantissa); return (error, Exp({mantissa: result})); } /** * @dev Multiply an Exp by a scalar, returning a new Exp. */ function mulScalar(Exp memory a, uint scalar) pure internal returns (MathError, Exp memory) { (MathError err0, uint scaledMantissa) = mulUInt(a.mantissa, scalar); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } return (MathError.NO_ERROR, Exp({mantissa: scaledMantissa})); } /** * @dev Multiply an Exp by a scalar, then truncate to return an unsigned integer. */ function mulScalarTruncate(Exp memory a, uint scalar) pure internal returns (MathError, uint) { (MathError err, Exp memory product) = mulScalar(a, scalar); if (err != MathError.NO_ERROR) { return (err, 0); } return (MathError.NO_ERROR, truncate(product)); } /** * @dev Multiply an Exp by a scalar, truncate, then add an to an unsigned integer, returning an unsigned integer. */ function mulScalarTruncateAddUInt(Exp memory a, uint scalar, uint addend) pure internal returns (MathError, uint) { (MathError err, Exp memory product) = mulScalar(a, scalar); if (err != MathError.NO_ERROR) { return (err, 0); } return addUInt(truncate(product), addend); } /** * @dev Divide an Exp by a scalar, returning a new Exp. */ function divScalar(Exp memory a, uint scalar) pure internal returns (MathError, Exp memory) { (MathError err0, uint descaledMantissa) = divUInt(a.mantissa, scalar); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } return (MathError.NO_ERROR, Exp({mantissa: descaledMantissa})); } /** * @dev Divide a scalar by an Exp, returning a new Exp. */ function divScalarByExp(uint scalar, Exp memory divisor) pure internal returns (MathError, Exp memory) { /* We are doing this as: getExp(mulUInt(expScale, scalar), divisor.mantissa) How it works: Exp = a / b; Scalar = s; `s / (a / b)` = `b * s / a` and since for an Exp `a = mantissa, b = expScale` */ (MathError err0, uint numerator) = mulUInt(expScale, scalar); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } return getExp(numerator, divisor.mantissa); } /** * @dev Divide a scalar by an Exp, then truncate to return an unsigned integer. */ function divScalarByExpTruncate(uint scalar, Exp memory divisor) pure internal returns (MathError, uint) { (MathError err, Exp memory fraction) = divScalarByExp(scalar, divisor); if (err != MathError.NO_ERROR) { return (err, 0); } return (MathError.NO_ERROR, truncate(fraction)); } /** * @dev Multiplies two exponentials, returning a new exponential. */ function mulExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) { (MathError err0, uint doubleScaledProduct) = mulUInt(a.mantissa, b.mantissa); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } // We add half the scale before dividing so that we get rounding instead of truncation. // See "Listing 6" and text above it at https://accu.org/index.php/journals/1717 // Without this change, a result like 6.6...e-19 will be truncated to 0 instead of being rounded to 1e-18. (MathError err1, uint doubleScaledProductWithHalfScale) = addUInt(halfExpScale, doubleScaledProduct); if (err1 != MathError.NO_ERROR) { return (err1, Exp({mantissa: 0})); } (MathError err2, uint product) = divUInt(doubleScaledProductWithHalfScale, expScale); // The only error `div` can return is MathError.DIVISION_BY_ZERO but we control `expScale` and it is not zero. assert(err2 == MathError.NO_ERROR); return (MathError.NO_ERROR, Exp({mantissa: product})); } /** * @dev Multiplies two exponentials given their mantissas, returning a new exponential. */ function mulExp(uint a, uint b) pure internal returns (MathError, Exp memory) { return mulExp(Exp({mantissa: a}), Exp({mantissa: b})); } /** * @dev Multiplies three exponentials, returning a new exponential. */ function mulExp3(Exp memory a, Exp memory b, Exp memory c) pure internal returns (MathError, Exp memory) { (MathError err, Exp memory ab) = mulExp(a, b); if (err != MathError.NO_ERROR) { return (err, ab); } return mulExp(ab, c); } /** * @dev Divides two exponentials, returning a new exponential. * (a/scale) / (b/scale) = (a/scale) * (scale/b) = a/b, * which we can scale as an Exp by calling getExp(a.mantissa, b.mantissa) */ function divExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) { return getExp(a.mantissa, b.mantissa); } /** * @dev Truncates the given exp to a whole number value. * For example, truncate(Exp{mantissa: 15 * expScale}) = 15 */ function truncate(Exp memory exp) pure internal returns (uint) { // Note: We are not using careful math here as we're performing a division that cannot fail return exp.mantissa / expScale; } /** * @dev Checks if first Exp is less than second Exp. */ function lessThanExp(Exp memory left, Exp memory right) pure internal returns (bool) { return left.mantissa < right.mantissa; } /** * @dev Checks if left Exp <= right Exp. */ function lessThanOrEqualExp(Exp memory left, Exp memory right) pure internal returns (bool) { return left.mantissa <= right.mantissa; } /** * @dev Checks if left Exp > right Exp. */ function greaterThanExp(Exp memory left, Exp memory right) pure internal returns (bool) { return left.mantissa > right.mantissa; } /** * @dev returns true if Exp is exactly zero */ function isZeroExp(Exp memory value) pure internal returns (bool) { return value.mantissa == 0; } function sub_(Exp memory a, Exp memory b) pure internal returns (Exp memory) { return Exp({mantissa: sub_(a.mantissa, b.mantissa)}); } function sub_(Double memory a, Double memory b) pure internal returns (Double memory) { return Double({mantissa: sub_(a.mantissa, b.mantissa)}); } function sub_(uint a, uint b) pure internal returns (uint) { return sub_(a, b, "subtraction underflow"); } function sub_(uint a, uint b, string memory errorMessage) pure internal returns (uint) { require(b <= a, errorMessage); return a - b; } function mul_(Exp memory a, Exp memory b) pure internal returns (Exp memory) { return Exp({mantissa: mul_(a.mantissa, b.mantissa) / expScale}); } function mul_(Exp memory a, uint b) pure internal returns (Exp memory) { return Exp({mantissa: mul_(a.mantissa, b)}); } function mul_(uint a, Exp memory b) pure internal returns (uint) { return mul_(a, b.mantissa) / expScale; } function mul_(Double memory a, Double memory b) pure internal returns (Double memory) { return Double({mantissa: mul_(a.mantissa, b.mantissa) / doubleScale}); } function mul_(Double memory a, uint b) pure internal returns (Double memory) { return Double({mantissa: mul_(a.mantissa, b)}); } function mul_(uint a, Double memory b) pure internal returns (uint) { return mul_(a, b.mantissa) / doubleScale; } function mul_(uint a, uint b) pure internal returns (uint) { return mul_(a, b, "multiplication overflow"); } function mul_(uint a, uint b, string memory errorMessage) pure internal returns (uint) { if (a == 0 || b == 0) { return 0; } uint c = a * b; require(c / a == b, errorMessage); return c; } function div_(Exp memory a, Exp memory b) pure internal returns (Exp memory) { return Exp({mantissa: div_(mul_(a.mantissa, expScale), b.mantissa)}); } function div_(Exp memory a, uint b) pure internal returns (Exp memory) { return Exp({mantissa: div_(a.mantissa, b)}); } function div_(uint a, Exp memory b) pure internal returns (uint) { return div_(mul_(a, expScale), b.mantissa); } function div_(Double memory a, Double memory b) pure internal returns (Double memory) { return Double({mantissa: div_(mul_(a.mantissa, doubleScale), b.mantissa)}); } function div_(Double memory a, uint b) pure internal returns (Double memory) { return Double({mantissa: div_(a.mantissa, b)}); } function div_(uint a, Double memory b) pure internal returns (uint) { return div_(mul_(a, doubleScale), b.mantissa); } function div_(uint a, uint b) pure internal returns (uint) { return div_(a, b, "divide by zero"); } function div_(uint a, uint b, string memory errorMessage) pure internal returns (uint) { require(b > 0, errorMessage); return a / b; } function add_(Exp memory a, Exp memory b) pure internal returns (Exp memory) { return Exp({mantissa: add_(a.mantissa, b.mantissa)}); } function add_(Double memory a, Double memory b) pure internal returns (Double memory) { return Double({mantissa: add_(a.mantissa, b.mantissa)}); } function add_(uint a, uint b) pure internal returns (uint) { return add_(a, b, "addition overflow"); } function add_(uint a, uint b, string memory errorMessage) pure internal returns (uint) { uint c = a + b; require(c >= a, errorMessage); return c; } } contract CompoundBorrowProxy { using SafeERC20 for ERC20; address public constant ETH_ADDR = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant COMPTROLLER_ADDR = 0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B; function borrow(address _cCollToken, address _cBorrowToken, address _borrowToken, uint _amount) public { address[] memory markets = new address[](2); markets[0] = _cCollToken; markets[1] = _cBorrowToken; ComptrollerInterface(COMPTROLLER_ADDR).enterMarkets(markets); require(CTokenInterface(_cBorrowToken).borrow(_amount) == 0); // withdraw funds to msg.sender if (_borrowToken != ETH_ADDR) { ERC20(_borrowToken).safeTransfer(msg.sender, ERC20(_borrowToken).balanceOf(address(this))); } else { msg.sender.transfer(address(this).balance); } } } contract CreamSafetyRatio is Exponential, DSMath { // solhint-disable-next-line const-name-snakecase ComptrollerInterface public constant comp = ComptrollerInterface(0x3d5BC3c8d13dcB8bF317092d84783c2697AE9258); /// @notice Calcualted the ratio of debt / adjusted collateral /// @param _user Address of the user function getSafetyRatio(address _user) public view returns (uint) { // For each asset the account is in address[] memory assets = comp.getAssetsIn(_user); address oracleAddr = comp.oracle(); uint sumCollateral = 0; uint sumBorrow = 0; for (uint i = 0; i < assets.length; i++) { address asset = assets[i]; (, uint cTokenBalance, uint borrowBalance, uint exchangeRateMantissa) = CTokenInterface(asset).getAccountSnapshot(_user); Exp memory oraclePrice; if (cTokenBalance != 0 || borrowBalance != 0) { oraclePrice = Exp({mantissa: CompoundOracleInterface(oracleAddr).getUnderlyingPrice(asset)}); } // Sum up collateral in Eth if (cTokenBalance != 0) { (, uint collFactorMantissa) = comp.markets(address(asset)); Exp memory collateralFactor = Exp({mantissa: collFactorMantissa}); Exp memory exchangeRate = Exp({mantissa: exchangeRateMantissa}); (, Exp memory tokensToEther) = mulExp3(collateralFactor, exchangeRate, oraclePrice); (, sumCollateral) = mulScalarTruncateAddUInt(tokensToEther, cTokenBalance, sumCollateral); } // Sum up debt in Eth if (borrowBalance != 0) { (, sumBorrow) = mulScalarTruncateAddUInt(oraclePrice, borrowBalance, sumBorrow); } } if (sumBorrow == 0) return uint(-1); uint borrowPowerUsed = (sumBorrow * 10**18) / sumCollateral; return wdiv(1e18, borrowPowerUsed); } } contract CreamSaverHelper is DSMath, Exponential { using SafeERC20 for ERC20; address payable public constant WALLET_ADDR = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; address public constant DISCOUNT_ADDR = 0x1b14E8D511c9A4395425314f849bD737BAF8208F; uint public constant MANUAL_SERVICE_FEE = 400; // 0.25% Fee uint public constant AUTOMATIC_SERVICE_FEE = 333; // 0.3% Fee address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant CETH_ADDRESS = 0xD06527D5e56A3495252A528C4987003b712860eE; address public constant COMPTROLLER = 0x3d5BC3c8d13dcB8bF317092d84783c2697AE9258; address public constant BOT_REGISTRY_ADDRESS = 0x637726f8b08a7ABE3aE3aCaB01A80E2d8ddeF77B; /// @notice Helper method to payback the cream debt /// @dev If amount is bigger it will repay the whole debt and send the extra to the _user /// @param _amount Amount of tokens we want to repay /// @param _cBorrowToken Ctoken address we are repaying /// @param _borrowToken Token address we are repaying /// @param _user Owner of the cream position we are paying back function paybackDebt(uint _amount, address _cBorrowToken, address _borrowToken, address payable _user) internal { uint wholeDebt = CTokenInterface(_cBorrowToken).borrowBalanceCurrent(address(this)); if (_amount > wholeDebt) { if (_borrowToken == ETH_ADDRESS) { _user.transfer((_amount - wholeDebt)); } else { ERC20(_borrowToken).safeTransfer(_user, (_amount - wholeDebt)); } _amount = wholeDebt; } approveCToken(_borrowToken, _cBorrowToken); if (_borrowToken == ETH_ADDRESS) { CEtherInterface(_cBorrowToken).repayBorrow{value: _amount}(); } else { require(CTokenInterface(_cBorrowToken).repayBorrow(_amount) == 0); } } /// @notice Calculates the fee amount /// @param _amount Amount that is converted /// @param _user Actuall user addr not DSProxy /// @param _gasCost Ether amount of gas we are spending for tx /// @param _cTokenAddr CToken addr. of token we are getting for the fee /// @return feeAmount The amount we took for the fee function getFee(uint _amount, address _user, uint _gasCost, address _cTokenAddr) internal returns (uint feeAmount) { uint fee = MANUAL_SERVICE_FEE; if (BotRegistry(BOT_REGISTRY_ADDRESS).botList(tx.origin)) { fee = AUTOMATIC_SERVICE_FEE; } address tokenAddr = getUnderlyingAddr(_cTokenAddr); if (Discount(DISCOUNT_ADDR).isCustomFeeSet(_user)) { fee = Discount(DISCOUNT_ADDR).getCustomServiceFee(_user); } feeAmount = (fee == 0) ? 0 : (_amount / fee); if (_gasCost != 0) { address oracle = ComptrollerInterface(COMPTROLLER).oracle(); uint ethTokenPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(_cTokenAddr); _gasCost = wdiv(_gasCost, ethTokenPrice); feeAmount = add(feeAmount, _gasCost); } // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } if (tokenAddr == ETH_ADDRESS) { WALLET_ADDR.transfer(feeAmount); } else { ERC20(tokenAddr).safeTransfer(WALLET_ADDR, feeAmount); } } /// @notice Calculates the gas cost of transaction and send it to wallet /// @param _amount Amount that is converted /// @param _gasCost Ether amount of gas we are spending for tx /// @param _cTokenAddr CToken addr. of token we are getting for the fee /// @return feeAmount The amount we took for the fee function getGasCost(uint _amount, uint _gasCost, address _cTokenAddr) internal returns (uint feeAmount) { address tokenAddr = getUnderlyingAddr(_cTokenAddr); if (_gasCost != 0) { address oracle = ComptrollerInterface(COMPTROLLER).oracle(); uint ethTokenPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(_cTokenAddr); feeAmount = wdiv(_gasCost, ethTokenPrice); } // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } if (tokenAddr == ETH_ADDRESS) { WALLET_ADDR.transfer(feeAmount); } else { ERC20(tokenAddr).safeTransfer(WALLET_ADDR, feeAmount); } } /// @notice Enters the market for the collatera and borrow tokens /// @param _cTokenAddrColl Collateral address we are entering the market in /// @param _cTokenAddrBorrow Borrow address we are entering the market in function enterMarket(address _cTokenAddrColl, address _cTokenAddrBorrow) internal { address[] memory markets = new address[](2); markets[0] = _cTokenAddrColl; markets[1] = _cTokenAddrBorrow; ComptrollerInterface(COMPTROLLER).enterMarkets(markets); } /// @notice Approves CToken contract to pull underlying tokens from the DSProxy /// @param _tokenAddr Token we are trying to approve /// @param _cTokenAddr Address which will gain the approval function approveCToken(address _tokenAddr, address _cTokenAddr) internal { if (_tokenAddr != ETH_ADDRESS) { ERC20(_tokenAddr).safeApprove(_cTokenAddr, uint(-1)); } } /// @notice Returns the underlying address of the cToken asset /// @param _cTokenAddress cToken address /// @return Token address of the cToken specified function getUnderlyingAddr(address _cTokenAddress) internal returns (address) { if (_cTokenAddress == CETH_ADDRESS) { return ETH_ADDRESS; } else { return CTokenInterface(_cTokenAddress).underlying(); } } /// @notice Returns the owner of the DSProxy that called the contract function getUserAddress() internal view returns (address) { DSProxy proxy = DSProxy(uint160(address(this))); return proxy.owner(); } /// @notice Returns the maximum amount of collateral available to withdraw /// @dev Due to rounding errors the result is - 1% wei from the exact amount /// @param _cCollAddress Collateral we are getting the max value of /// @param _account Users account /// @return Returns the max. collateral amount in that token function getMaxCollateral(address _cCollAddress, address _account) public returns (uint) { (, uint liquidityInEth, ) = ComptrollerInterface(COMPTROLLER).getAccountLiquidity(_account); uint usersBalance = CTokenInterface(_cCollAddress).balanceOfUnderlying(_account); address oracle = ComptrollerInterface(COMPTROLLER).oracle(); if (liquidityInEth == 0) return usersBalance; CTokenInterface(_cCollAddress).accrueInterest(); if (_cCollAddress == CETH_ADDRESS) { if (liquidityInEth > usersBalance) return usersBalance; return sub(liquidityInEth, (liquidityInEth / 100)); } uint ethPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(_cCollAddress); uint liquidityInToken = wdiv(liquidityInEth, ethPrice); if (liquidityInToken > usersBalance) return usersBalance; return sub(liquidityInToken, (liquidityInToken / 100)); // cut off 1% due to rounding issues } /// @notice Returns the maximum amount of borrow amount available /// @dev Due to rounding errors the result is - 1% wei from the exact amount /// @param _cBorrowAddress Borrow token we are getting the max value of /// @param _account Users account /// @return Returns the max. borrow amount in that token function getMaxBorrow(address _cBorrowAddress, address _account) public returns (uint) { (, uint liquidityInEth, ) = ComptrollerInterface(COMPTROLLER).getAccountLiquidity(_account); address oracle = ComptrollerInterface(COMPTROLLER).oracle(); CTokenInterface(_cBorrowAddress).accrueInterest(); if (_cBorrowAddress == CETH_ADDRESS) return sub(liquidityInEth, (liquidityInEth / 100)); uint ethPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(_cBorrowAddress); uint liquidityInToken = wdiv(liquidityInEth, ethPrice); return sub(liquidityInToken, (liquidityInToken / 100)); // cut off 1% due to rounding issues } } contract CreamBorrowProxy { using SafeERC20 for ERC20; address public constant ETH_ADDR = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant COMPTROLLER_ADDR = 0x3d5BC3c8d13dcB8bF317092d84783c2697AE9258; function borrow(address _cCollToken, address _cBorrowToken, address _borrowToken, uint _amount) public { address[] memory markets = new address[](2); markets[0] = _cCollToken; markets[1] = _cBorrowToken; ComptrollerInterface(COMPTROLLER_ADDR).enterMarkets(markets); require(CTokenInterface(_cBorrowToken).borrow(_amount) == 0); // withdraw funds to msg.sender if (_borrowToken != ETH_ADDR) { ERC20(_borrowToken).safeTransfer(msg.sender, ERC20(_borrowToken).balanceOf(address(this))); } else { msg.sender.transfer(address(this).balance); } } } contract AllowanceProxy is AdminAuth { using SafeERC20 for ERC20; address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; // TODO: Real saver exchange address SaverExchange saverExchange = SaverExchange(0x235abFAd01eb1BDa28Ef94087FBAA63E18074926); function callSell(SaverExchangeCore.ExchangeData memory exData) public payable { pullAndSendTokens(exData.srcAddr, exData.srcAmount); saverExchange.sell{value: msg.value}(exData, msg.sender); } function callBuy(SaverExchangeCore.ExchangeData memory exData) public payable { pullAndSendTokens(exData.srcAddr, exData.srcAmount); saverExchange.buy{value: msg.value}(exData, msg.sender); } function pullAndSendTokens(address _tokenAddr, uint _amount) internal { if (_tokenAddr == KYBER_ETH_ADDRESS) { require(msg.value >= _amount, "msg.value smaller than amount"); } else { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(saverExchange), _amount); } } function ownerChangeExchange(address payable _newExchange) public onlyOwner { saverExchange = SaverExchange(_newExchange); } } contract Prices is DSMath { address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; enum ActionType { SELL, BUY } /// @notice Returns the best estimated price from 2 exchanges /// @param _amount Amount of source tokens you want to exchange /// @param _srcToken Address of the source token /// @param _destToken Address of the destination token /// @param _type Type of action SELL|BUY /// @param _wrappers Array of wrapper addresses to compare /// @return (address, uint) The address of the best exchange and the exchange price function getBestPrice( uint256 _amount, address _srcToken, address _destToken, ActionType _type, address[] memory _wrappers ) public returns (address, uint256) { uint256[] memory rates = new uint256[](_wrappers.length); for (uint i=0; i<_wrappers.length; i++) { rates[i] = getExpectedRate(_wrappers[i], _srcToken, _destToken, _amount, _type); } return getBiggestRate(_wrappers, rates); } /// @notice Return the expected rate from the exchange wrapper /// @dev In case of Oasis/Uniswap handles the different precision tokens /// @param _wrapper Address of exchange wrapper /// @param _srcToken From token /// @param _destToken To token /// @param _amount Amount to be exchanged /// @param _type Type of action SELL|BUY function getExpectedRate( address _wrapper, address _srcToken, address _destToken, uint256 _amount, ActionType _type ) public returns (uint256) { bool success; bytes memory result; if (_type == ActionType.SELL) { (success, result) = _wrapper.call(abi.encodeWithSignature( "getSellRate(address,address,uint256)", _srcToken, _destToken, _amount )); } else { (success, result) = _wrapper.call(abi.encodeWithSignature( "getBuyRate(address,address,uint256)", _srcToken, _destToken, _amount )); } if (success) { return sliceUint(result, 0); } return 0; } /// @notice Finds the biggest rate between exchanges, needed for sell rate /// @param _wrappers Array of wrappers to compare /// @param _rates Array of rates to compare function getBiggestRate( address[] memory _wrappers, uint256[] memory _rates ) internal pure returns (address, uint) { uint256 maxIndex = 0; // starting from 0 in case there is only one rate in array for (uint256 i=0; i<_rates.length; i++) { if (_rates[i] > _rates[maxIndex]) { maxIndex = i; } } return (_wrappers[maxIndex], _rates[maxIndex]); } function getDecimals(address _token) internal view returns (uint256) { if (_token == KYBER_ETH_ADDRESS) return 18; return ERC20(_token).decimals(); } function sliceUint(bytes memory bs, uint256 start) internal pure returns (uint256) { require(bs.length >= start + 32, "slicing out of range"); uint256 x; assembly { x := mload(add(bs, add(0x20, start))) } return x; } } contract SaverExchangeHelper { using SafeERC20 for ERC20; address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant WETH_ADDRESS = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address payable public constant WALLET_ID = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; address public constant DISCOUNT_ADDRESS = 0x1b14E8D511c9A4395425314f849bD737BAF8208F; address public constant SAVER_EXCHANGE_REGISTRY = 0x25dd3F51e0C3c3Ff164DDC02A8E4D65Bb9cBB12D; address public constant ERC20_PROXY_0X = 0x95E6F48254609A6ee006F7D493c8e5fB97094ceF; address public constant ZRX_ALLOWLIST_ADDR = 0x4BA1f38427b33B8ab7Bb0490200dAE1F1C36823F; function getDecimals(address _token) internal view returns (uint256) { if (_token == KYBER_ETH_ADDRESS) return 18; return ERC20(_token).decimals(); } function getBalance(address _tokenAddr) internal view returns (uint balance) { if (_tokenAddr == KYBER_ETH_ADDRESS) { balance = address(this).balance; } else { balance = ERC20(_tokenAddr).balanceOf(address(this)); } } function approve0xProxy(address _tokenAddr, uint _amount) internal { if (_tokenAddr != KYBER_ETH_ADDRESS) { ERC20(_tokenAddr).safeApprove(address(ERC20_PROXY_0X), _amount); } } function sendLeftover(address _srcAddr, address _destAddr, address payable _to) internal { // send back any leftover ether or tokens if (address(this).balance > 0) { _to.transfer(address(this).balance); } if (getBalance(_srcAddr) > 0) { ERC20(_srcAddr).safeTransfer(_to, getBalance(_srcAddr)); } if (getBalance(_destAddr) > 0) { ERC20(_destAddr).safeTransfer(_to, getBalance(_destAddr)); } } function sliceUint(bytes memory bs, uint256 start) internal pure returns (uint256) { require(bs.length >= start + 32, "slicing out of range"); uint256 x; assembly { x := mload(add(bs, add(0x20, start))) } return x; } } contract SaverExchangeRegistry is AdminAuth { mapping(address => bool) private wrappers; constructor() public { wrappers[0x880A845A85F843a5c67DB2061623c6Fc3bB4c511] = true; wrappers[0x4c9B55f2083629A1F7aDa257ae984E03096eCD25] = true; wrappers[0x42A9237b872368E1bec4Ca8D26A928D7d39d338C] = true; } function addWrapper(address _wrapper) public onlyOwner { wrappers[_wrapper] = true; } function removeWrapper(address _wrapper) public onlyOwner { wrappers[_wrapper] = false; } function isWrapper(address _wrapper) public view returns(bool) { return wrappers[_wrapper]; } } contract DFSExchangeData { // first is empty to keep the legacy order in place enum ExchangeType { _, OASIS, KYBER, UNISWAP, ZEROX } enum ActionType { SELL, BUY } struct OffchainData { address exchangeAddr; address allowanceTarget; uint256 price; uint256 protocolFee; bytes callData; } struct ExchangeData { address srcAddr; address destAddr; uint256 srcAmount; uint256 destAmount; uint256 minPrice; uint256 dfsFeeDivider; address user; address wrapper; bytes wrapperData; OffchainData offchainData; } function packExchangeData(ExchangeData memory _exData) public pure returns(bytes memory) { return abi.encode(_exData); } function unpackExchangeData(bytes memory _data) public pure returns(ExchangeData memory _exData) { _exData = abi.decode(_data, (ExchangeData)); } } contract DFSExchangeHelper { using SafeERC20 for ERC20; address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant WETH_ADDRESS = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address payable public constant WALLET_ID = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; address public constant DISCOUNT_ADDRESS = 0x1b14E8D511c9A4395425314f849bD737BAF8208F; address public constant SAVER_EXCHANGE_REGISTRY = 0x25dd3F51e0C3c3Ff164DDC02A8E4D65Bb9cBB12D; address public constant ZRX_ALLOWLIST_ADDR = 0x4BA1f38427b33B8ab7Bb0490200dAE1F1C36823F; function getDecimals(address _token) internal view returns (uint256) { if (_token == KYBER_ETH_ADDRESS) return 18; return ERC20(_token).decimals(); } function getBalance(address _tokenAddr) internal view returns (uint balance) { if (_tokenAddr == KYBER_ETH_ADDRESS) { balance = address(this).balance; } else { balance = ERC20(_tokenAddr).balanceOf(address(this)); } } function sendLeftover(address _srcAddr, address _destAddr, address payable _to) internal { // send back any leftover ether or tokens if (address(this).balance > 0) { _to.transfer(address(this).balance); } if (getBalance(_srcAddr) > 0) { ERC20(_srcAddr).safeTransfer(_to, getBalance(_srcAddr)); } if (getBalance(_destAddr) > 0) { ERC20(_destAddr).safeTransfer(_to, getBalance(_destAddr)); } } /// @notice Takes a feePercentage and sends it to wallet /// @param _amount Dai amount of the whole trade /// @param _user Address of the user /// @param _token Address of the token /// @param _dfsFeeDivider Dfs fee divider /// @return feeAmount Amount in Dai owner earned on the fee function getFee(uint256 _amount, address _user, address _token, uint256 _dfsFeeDivider) internal returns (uint256 feeAmount) { if (_dfsFeeDivider != 0 && Discount(DISCOUNT_ADDRESS).isCustomFeeSet(_user)) { _dfsFeeDivider = Discount(DISCOUNT_ADDRESS).getCustomServiceFee(_user); } if (_dfsFeeDivider == 0) { feeAmount = 0; } else { feeAmount = _amount / _dfsFeeDivider; // fee can't go over 10% of the whole amount if (feeAmount > (_amount / 10)) { feeAmount = _amount / 10; } if (_token == KYBER_ETH_ADDRESS) { WALLET_ID.transfer(feeAmount); } else { ERC20(_token).safeTransfer(WALLET_ID, feeAmount); } } } function sliceUint(bytes memory bs, uint256 start) internal pure returns (uint256) { require(bs.length >= start + 32, "slicing out of range"); uint256 x; assembly { x := mload(add(bs, add(0x20, start))) } return x; } } contract DFSPricesV3 is DSMath { address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; enum ActionType { SELL, BUY } /// @notice Returns the best estimated price from 2 exchanges /// @param _amount Amount of source tokens you want to exchange /// @param _srcToken Address of the source token /// @param _destToken Address of the destination token /// @param _type Type of action SELL|BUY /// @param _wrappers Array of wrapper addresses to compare /// @return (address, uint) The address of the best exchange and the exchange price function getBestPrice( uint256 _amount, address _srcToken, address _destToken, ActionType _type, address[] memory _wrappers, bytes[] memory _additionalData ) public returns (address, uint256) { uint256[] memory rates = new uint256[](_wrappers.length); for (uint i=0; i<_wrappers.length; i++) { rates[i] = getExpectedRate(_wrappers[i], _srcToken, _destToken, _amount, _type, _additionalData[i]); } return getBiggestRate(_wrappers, rates); } /// @notice Return the expected rate from the exchange wrapper /// @dev In case of Oasis/Uniswap handles the different precision tokens /// @param _wrapper Address of exchange wrapper /// @param _srcToken From token /// @param _destToken To token /// @param _amount Amount to be exchanged /// @param _type Type of action SELL|BUY function getExpectedRate( address _wrapper, address _srcToken, address _destToken, uint256 _amount, ActionType _type, bytes memory _additionalData ) public returns (uint256) { bool success; bytes memory result; if (_type == ActionType.SELL) { (success, result) = _wrapper.call(abi.encodeWithSignature( "getSellRate(address,address,uint256,bytes)", _srcToken, _destToken, _amount, _additionalData )); } else { (success, result) = _wrapper.call(abi.encodeWithSignature( "getBuyRate(address,address,uint256,bytes)", _srcToken, _destToken, _amount, _additionalData )); } if (success) { return sliceUint(result, 0); } return 0; } /// @notice Finds the biggest rate between exchanges, needed for sell rate /// @param _wrappers Array of wrappers to compare /// @param _rates Array of rates to compare function getBiggestRate( address[] memory _wrappers, uint256[] memory _rates ) internal pure returns (address, uint) { uint256 maxIndex = 0; // starting from 0 in case there is only one rate in array for (uint256 i=0; i<_rates.length; i++) { if (_rates[i] > _rates[maxIndex]) { maxIndex = i; } } return (_wrappers[maxIndex], _rates[maxIndex]); } function getDecimals(address _token) internal view returns (uint256) { if (_token == KYBER_ETH_ADDRESS) return 18; return ERC20(_token).decimals(); } function sliceUint(bytes memory bs, uint256 start) internal pure returns (uint256) { require(bs.length >= start + 32, "slicing out of range"); uint256 x; assembly { x := mload(add(bs, add(0x20, start))) } return x; } } abstract contract CEtherInterface { function mint() external virtual payable; function repayBorrow() external virtual payable; } abstract contract CompoundOracleInterface { function getUnderlyingPrice(address cToken) external view virtual returns (uint); } abstract contract ComptrollerInterface { struct CompMarketState { uint224 index; uint32 block; } function claimComp(address holder) public virtual; function claimComp(address holder, address[] memory cTokens) public virtual; function claimComp(address[] memory holders, address[] memory cTokens, bool borrowers, bool suppliers) public virtual; function compSupplyState(address) public view virtual returns (CompMarketState memory); function compSupplierIndex(address,address) public view virtual returns (uint); function compAccrued(address) public view virtual returns (uint); function compBorrowState(address) public view virtual returns (CompMarketState memory); function compBorrowerIndex(address,address) public view virtual returns (uint); function enterMarkets(address[] calldata cTokens) external virtual returns (uint256[] memory); function exitMarket(address cToken) external virtual returns (uint256); function getAssetsIn(address account) external virtual view returns (address[] memory); function markets(address account) public virtual view returns (bool, uint256); function getAccountLiquidity(address account) external virtual view returns (uint256, uint256, uint256); function oracle() public virtual view returns (address); } abstract contract DSProxyInterface { /// Truffle wont compile if this isn't commented // function execute(bytes memory _code, bytes memory _data) // public virtual // payable // returns (address, bytes32); function execute(address _target, bytes memory _data) public virtual payable returns (bytes32); function setCache(address _cacheAddr) public virtual payable returns (bool); function owner() public virtual returns (address); } abstract contract DaiJoin { function vat() public virtual returns (Vat); function dai() public virtual returns (Gem); function join(address, uint) public virtual payable; function exit(address, uint) public virtual; } interface ERC20 { function totalSupply() external view returns (uint256 supply); function balanceOf(address _owner) external view returns (uint256 balance); function transfer(address _to, uint256 _value) external returns (bool success); function transferFrom(address _from, address _to, uint256 _value) external returns (bool success); function approve(address _spender, uint256 _value) external returns (bool success); function allowance(address _owner, address _spender) external view returns (uint256 remaining); function decimals() external view returns (uint256 digits); event Approval(address indexed _owner, address indexed _spender, uint256 _value); } interface ExchangeInterface { function swapEtherToToken(uint256 _ethAmount, address _tokenAddress, uint256 _maxAmount) external payable returns (uint256, uint256); function swapTokenToEther(address _tokenAddress, uint256 _amount, uint256 _maxAmount) external returns (uint256); function swapTokenToToken(address _src, address _dest, uint256 _amount) external payable returns (uint256); function getExpectedRate(address src, address dest, uint256 srcQty) external view returns (uint256 expectedRate); } interface ExchangeInterfaceV2 { function sell(address _srcAddr, address _destAddr, uint _srcAmount) external payable returns (uint); function buy(address _srcAddr, address _destAddr, uint _destAmount) external payable returns(uint); function getSellRate(address _srcAddr, address _destAddr, uint _srcAmount) external view returns (uint); function getBuyRate(address _srcAddr, address _destAddr, uint _srcAmount) external view returns (uint); } interface ExchangeInterfaceV3 { function sell(address _srcAddr, address _destAddr, uint _srcAmount, bytes memory _additionalData) external payable returns (uint); function buy(address _srcAddr, address _destAddr, uint _destAmount, bytes memory _additionalData) external payable returns(uint); function getSellRate(address _srcAddr, address _destAddr, uint _srcAmount, bytes memory _additionalData) external view returns (uint); function getBuyRate(address _srcAddr, address _destAddr, uint _srcAmount, bytes memory _additionalData) external view returns (uint); } abstract contract Flipper { function bids(uint _bidId) public virtual returns (uint256, uint256, address, uint48, uint48, address, address, uint256); function tend(uint id, uint lot, uint bid) virtual external; function dent(uint id, uint lot, uint bid) virtual external; function deal(uint id) virtual external; } abstract contract GasTokenInterface is ERC20 { function free(uint256 value) public virtual returns (bool success); function freeUpTo(uint256 value) public virtual returns (uint256 freed); function freeFrom(address from, uint256 value) public virtual returns (bool success); function freeFromUpTo(address from, uint256 value) public virtual returns (uint256 freed); } abstract contract Gem { function dec() virtual public returns (uint); function gem() virtual public returns (Gem); function join(address, uint) virtual public payable; function exit(address, uint) virtual public; function approve(address, uint) virtual public; function transfer(address, uint) virtual public returns (bool); function transferFrom(address, address, uint) virtual public returns (bool); function deposit() virtual public payable; function withdraw(uint) virtual public; function allowance(address, address) virtual public returns (uint); } abstract contract IAToken { function redeem(uint256 _amount) external virtual; function balanceOf(address _owner) external virtual view returns (uint256 balance); } abstract contract IAaveSubscription { function subscribe(uint128 _minRatio, uint128 _maxRatio, uint128 _optimalBoost, uint128 _optimalRepay, bool _boostEnabled) public virtual; function unsubscribe() public virtual; } abstract contract ICompoundSubscription { function subscribe(uint128 _minRatio, uint128 _maxRatio, uint128 _optimalBoost, uint128 _optimalRepay, bool _boostEnabled) public virtual; function unsubscribe() public virtual; } abstract contract ICompoundSubscriptions { function unsubscribe() external virtual ; } abstract contract ILendingPool { function flashLoan( address payable _receiver, address _reserve, uint _amount, bytes calldata _params) external virtual; function deposit(address _reserve, uint256 _amount, uint16 _referralCode) external virtual payable; function setUserUseReserveAsCollateral(address _reserve, bool _useAsCollateral) external virtual; function borrow(address _reserve, uint256 _amount, uint256 _interestRateMode, uint16 _referralCode) external virtual; function repay( address _reserve, uint256 _amount, address payable _onBehalfOf) external virtual payable; function swapBorrowRateMode(address _reserve) external virtual; function getReserves() external virtual view returns(address[] memory); /// @param _reserve underlying token address function getReserveData(address _reserve) external virtual view returns ( uint256 totalLiquidity, // reserve total liquidity uint256 availableLiquidity, // reserve available liquidity for borrowing uint256 totalBorrowsStable, // total amount of outstanding borrows at Stable rate uint256 totalBorrowsVariable, // total amount of outstanding borrows at Variable rate uint256 liquidityRate, // current deposit APY of the reserve for depositors, in Ray units. uint256 variableBorrowRate, // current variable rate APY of the reserve pool, in Ray units. uint256 stableBorrowRate, // current stable rate APY of the reserve pool, in Ray units. uint256 averageStableBorrowRate, // current average stable borrow rate uint256 utilizationRate, // expressed as total borrows/total liquidity. uint256 liquidityIndex, // cumulative liquidity index uint256 variableBorrowIndex, // cumulative variable borrow index address aTokenAddress, // aTokens contract address for the specific _reserve uint40 lastUpdateTimestamp // timestamp of the last update of reserve data ); /// @param _user users address function getUserAccountData(address _user) external virtual view returns ( uint256 totalLiquidityETH, // user aggregated deposits across all the reserves. In Wei uint256 totalCollateralETH, // user aggregated collateral across all the reserves. In Wei uint256 totalBorrowsETH, // user aggregated outstanding borrows across all the reserves. In Wei uint256 totalFeesETH, // user aggregated current outstanding fees in ETH. In Wei uint256 availableBorrowsETH, // user available amount to borrow in ETH uint256 currentLiquidationThreshold, // user current average liquidation threshold across all the collaterals deposited uint256 ltv, // user average Loan-to-Value between all the collaterals uint256 healthFactor // user current Health Factor ); /// @param _reserve underlying token address /// @param _user users address function getUserReserveData(address _reserve, address _user) external virtual view returns ( uint256 currentATokenBalance, // user current reserve aToken balance uint256 currentBorrowBalance, // user current reserve outstanding borrow balance uint256 principalBorrowBalance, // user balance of borrowed asset uint256 borrowRateMode, // user borrow rate mode either Stable or Variable uint256 borrowRate, // user current borrow rate APY uint256 liquidityRate, // user current earn rate on _reserve uint256 originationFee, // user outstanding loan origination fee uint256 variableBorrowIndex, // user variable cumulative index uint256 lastUpdateTimestamp, // Timestamp of the last data update bool usageAsCollateralEnabled // Whether the user's current reserve is enabled as a collateral ); function getReserveConfigurationData(address _reserve) external virtual view returns ( uint256 ltv, uint256 liquidationThreshold, uint256 liquidationBonus, address rateStrategyAddress, bool usageAsCollateralEnabled, bool borrowingEnabled, bool stableBorrowRateEnabled, bool isActive ); // ------------------ LendingPoolCoreData ------------------------ function getReserveATokenAddress(address _reserve) public virtual view returns (address); function getReserveConfiguration(address _reserve) external virtual view returns (uint256, uint256, uint256, bool); function getUserUnderlyingAssetBalance(address _reserve, address _user) public virtual view returns (uint256); function getReserveCurrentLiquidityRate(address _reserve) public virtual view returns (uint256); function getReserveCurrentVariableBorrowRate(address _reserve) public virtual view returns (uint256); function getReserveCurrentStableBorrowRate(address _reserve) public virtual view returns (uint256); function getReserveTotalLiquidity(address _reserve) public virtual view returns (uint256); function getReserveAvailableLiquidity(address _reserve) public virtual view returns (uint256); function getReserveTotalBorrowsVariable(address _reserve) public virtual view returns (uint256); // ---------------- LendingPoolDataProvider --------------------- function calculateUserGlobalData(address _user) public virtual view returns ( uint256 totalLiquidityBalanceETH, uint256 totalCollateralBalanceETH, uint256 totalBorrowBalanceETH, uint256 totalFeesETH, uint256 currentLtv, uint256 currentLiquidationThreshold, uint256 healthFactor, bool healthFactorBelowThreshold ); } abstract contract ILendingPoolAddressesProvider { function getLendingPool() public virtual view returns (address); function getLendingPoolCore() public virtual view returns (address payable); function getLendingPoolConfigurator() public virtual view returns (address); function getLendingPoolDataProvider() public virtual view returns (address); function getLendingPoolParametersProvider() public virtual view returns (address); function getTokenDistributor() public virtual view returns (address); function getFeeProvider() public virtual view returns (address); function getLendingPoolLiquidationManager() public virtual view returns (address); function getLendingPoolManager() public virtual view returns (address); function getPriceOracle() public virtual view returns (address); function getLendingRateOracle() public virtual view returns (address); } abstract contract ILoanShifter { function getLoanAmount(uint, address) public virtual returns (uint); function getUnderlyingAsset(address _addr) public view virtual returns (address); } abstract contract IMCDSubscriptions { function unsubscribe(uint256 _cdpId) external virtual ; function subscribersPos(uint256 _cdpId) external virtual returns (uint256, bool); } abstract contract IPriceOracleGetterAave { function getAssetPrice(address _asset) external virtual view returns (uint256); function getAssetsPrices(address[] calldata _assets) external virtual view returns(uint256[] memory); function getSourceOfAsset(address _asset) external virtual view returns(address); function getFallbackOracle() external virtual view returns(address); } abstract contract ITokenInterface is ERC20 { function assetBalanceOf(address _owner) public virtual view returns (uint256); function mint(address receiver, uint256 depositAmount) external virtual returns (uint256 mintAmount); function burn(address receiver, uint256 burnAmount) external virtual returns (uint256 loanAmountPaid); function tokenPrice() public virtual view returns (uint256 price); } abstract contract Join { bytes32 public ilk; function dec() virtual public view returns (uint); function gem() virtual public view returns (Gem); function join(address, uint) virtual public payable; function exit(address, uint) virtual public; } abstract contract Jug { struct Ilk { uint256 duty; uint256 rho; } mapping (bytes32 => Ilk) public ilks; function drip(bytes32) public virtual returns (uint); } abstract contract KyberNetworkProxyInterface { function maxGasPrice() external virtual view returns (uint256); function getUserCapInWei(address user) external virtual view returns (uint256); function getUserCapInTokenWei(address user, ERC20 token) external virtual view returns (uint256); function enabled() external virtual view returns (bool); function info(bytes32 id) external virtual view returns (uint256); function getExpectedRate(ERC20 src, ERC20 dest, uint256 srcQty) public virtual view returns (uint256 expectedRate, uint256 slippageRate); function tradeWithHint( ERC20 src, uint256 srcAmount, ERC20 dest, address destAddress, uint256 maxDestAmount, uint256 minConversionRate, address walletId, bytes memory hint ) public virtual payable returns (uint256); function trade( ERC20 src, uint256 srcAmount, ERC20 dest, address destAddress, uint256 maxDestAmount, uint256 minConversionRate, address walletId ) public virtual payable returns (uint256); function swapEtherToToken(ERC20 token, uint256 minConversionRate) external virtual payable returns (uint256); function swapTokenToEther(ERC20 token, uint256 tokenQty, uint256 minRate) external virtual payable returns (uint256); function swapTokenToToken(ERC20 src, uint256 srcAmount, ERC20 dest, uint256 minConversionRate) public virtual returns (uint256); } abstract contract Manager { function last(address) virtual public returns (uint); function cdpCan(address, uint, address) virtual public view returns (uint); function ilks(uint) virtual public view returns (bytes32); function owns(uint) virtual public view returns (address); function urns(uint) virtual public view returns (address); function vat() virtual public view returns (address); function open(bytes32, address) virtual public returns (uint); function give(uint, address) virtual public; function cdpAllow(uint, address, uint) virtual public; function urnAllow(address, uint) virtual public; function frob(uint, int, int) virtual public; function flux(uint, address, uint) virtual public; function move(uint, address, uint) virtual public; function exit(address, uint, address, uint) virtual public; function quit(uint, address) virtual public; function enter(address, uint) virtual public; function shift(uint, uint) virtual public; } abstract contract OasisInterface { function getBuyAmount(address tokenToBuy, address tokenToPay, uint256 amountToPay) external virtual view returns (uint256 amountBought); function getPayAmount(address tokenToPay, address tokenToBuy, uint256 amountToBuy) public virtual view returns (uint256 amountPaid); function sellAllAmount(address pay_gem, uint256 pay_amt, address buy_gem, uint256 min_fill_amount) public virtual returns (uint256 fill_amt); function buyAllAmount(address buy_gem, uint256 buy_amt, address pay_gem, uint256 max_fill_amount) public virtual returns (uint256 fill_amt); } abstract contract Osm { mapping(address => uint256) public bud; function peep() external view virtual returns (bytes32, bool); } abstract contract OsmMom { mapping (bytes32 => address) public osms; } abstract contract PipInterface { function read() public virtual returns (bytes32); } abstract contract ProxyRegistryInterface { function proxies(address _owner) public virtual view returns (address); function build(address) public virtual returns (address); } abstract contract Spotter { struct Ilk { PipInterface pip; uint256 mat; } mapping (bytes32 => Ilk) public ilks; uint256 public par; } abstract contract TokenInterface { function allowance(address, address) public virtual returns (uint256); function balanceOf(address) public virtual returns (uint256); function approve(address, uint256) public virtual; function transfer(address, uint256) public virtual returns (bool); function transferFrom(address, address, uint256) public virtual returns (bool); function deposit() public virtual payable; function withdraw(uint256) public virtual; } abstract contract UniswapExchangeInterface { function getEthToTokenInputPrice(uint256 eth_sold) external virtual view returns (uint256 tokens_bought); function getEthToTokenOutputPrice(uint256 tokens_bought) external virtual view returns (uint256 eth_sold); function getTokenToEthInputPrice(uint256 tokens_sold) external virtual view returns (uint256 eth_bought); function getTokenToEthOutputPrice(uint256 eth_bought) external virtual view returns (uint256 tokens_sold); function tokenToEthTransferInput( uint256 tokens_sold, uint256 min_eth, uint256 deadline, address recipient ) external virtual returns (uint256 eth_bought); function ethToTokenTransferInput(uint256 min_tokens, uint256 deadline, address recipient) external virtual payable returns (uint256 tokens_bought); function tokenToTokenTransferInput( uint256 tokens_sold, uint256 min_tokens_bought, uint256 min_eth_bought, uint256 deadline, address recipient, address token_addr ) external virtual returns (uint256 tokens_bought); function ethToTokenTransferOutput( uint256 tokens_bought, uint256 deadline, address recipient ) external virtual payable returns (uint256 eth_sold); function tokenToEthTransferOutput( uint256 eth_bought, uint256 max_tokens, uint256 deadline, address recipient ) external virtual returns (uint256 tokens_sold); function tokenToTokenTransferOutput( uint256 tokens_bought, uint256 max_tokens_sold, uint256 max_eth_sold, uint256 deadline, address recipient, address token_addr ) external virtual returns (uint256 tokens_sold); } abstract contract UniswapFactoryInterface { function getExchange(address token) external view virtual returns (address exchange); } abstract contract UniswapRouterInterface { function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline) external virtual returns (uint[] memory amounts); function swapExactTokensForTokens( uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline ) external virtual returns (uint[] memory amounts); function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline) external virtual returns (uint[] memory amounts); function swapTokensForExactTokens( uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline ) external virtual returns (uint[] memory amounts); function getAmountsOut(uint amountIn, address[] memory path) public virtual view returns (uint[] memory amounts); function getAmountsIn(uint amountOut, address[] memory path) public virtual view returns (uint[] memory amounts); } abstract contract Vat { struct Urn { uint256 ink; // Locked Collateral [wad] uint256 art; // Normalised Debt [wad] } struct Ilk { uint256 Art; // Total Normalised Debt [wad] uint256 rate; // Accumulated Rates [ray] uint256 spot; // Price with Safety Margin [ray] uint256 line; // Debt Ceiling [rad] uint256 dust; // Urn Debt Floor [rad] } mapping (bytes32 => mapping (address => Urn )) public urns; mapping (bytes32 => Ilk) public ilks; mapping (bytes32 => mapping (address => uint)) public gem; // [wad] function can(address, address) virtual public view returns (uint); function dai(address) virtual public view returns (uint); function frob(bytes32, address, address, address, int, int) virtual public; function hope(address) virtual public; function move(address, address, uint) virtual public; function fork(bytes32, address, address, int, int) virtual public; } contract DefisaverLogger { event LogEvent( address indexed contractAddress, address indexed caller, string indexed logName, bytes data ); // solhint-disable-next-line func-name-mixedcase function Log(address _contract, address _caller, string memory _logName, bytes memory _data) public { emit LogEvent(_contract, _caller, _logName, _data); } } contract MCDMonitorProxyV2 is AdminAuth { uint public CHANGE_PERIOD; address public monitor; address public newMonitor; address public lastMonitor; uint public changeRequestedTimestamp; mapping(address => bool) public allowed; event MonitorChangeInitiated(address oldMonitor, address newMonitor); event MonitorChangeCanceled(); event MonitorChangeFinished(address monitor); event MonitorChangeReverted(address monitor); // if someone who is allowed become malicious, owner can't be changed modifier onlyAllowed() { require(allowed[msg.sender] || msg.sender == owner); _; } modifier onlyMonitor() { require (msg.sender == monitor); _; } constructor(uint _changePeriod) public { CHANGE_PERIOD = _changePeriod * 1 days; } /// @notice Only monitor contract is able to call execute on users proxy /// @param _owner Address of cdp owner (users DSProxy address) /// @param _saverProxy Address of MCDSaverProxy /// @param _data Data to send to MCDSaverProxy function callExecute(address _owner, address _saverProxy, bytes memory _data) public payable onlyMonitor { // execute reverts if calling specific method fails DSProxyInterface(_owner).execute{value: msg.value}(_saverProxy, _data); // return if anything left if (address(this).balance > 0) { msg.sender.transfer(address(this).balance); } } /// @notice Allowed users are able to set Monitor contract without any waiting period first time /// @param _monitor Address of Monitor contract function setMonitor(address _monitor) public onlyAllowed { require(monitor == address(0)); monitor = _monitor; } /// @notice Allowed users are able to start procedure for changing monitor /// @dev after CHANGE_PERIOD needs to call confirmNewMonitor to actually make a change /// @param _newMonitor address of new monitor function changeMonitor(address _newMonitor) public onlyAllowed { require(changeRequestedTimestamp == 0); changeRequestedTimestamp = now; lastMonitor = monitor; newMonitor = _newMonitor; emit MonitorChangeInitiated(lastMonitor, newMonitor); } /// @notice At any point allowed users are able to cancel monitor change function cancelMonitorChange() public onlyAllowed { require(changeRequestedTimestamp > 0); changeRequestedTimestamp = 0; newMonitor = address(0); emit MonitorChangeCanceled(); } /// @notice Anyone is able to confirm new monitor after CHANGE_PERIOD if process is started function confirmNewMonitor() public onlyAllowed { require((changeRequestedTimestamp + CHANGE_PERIOD) < now); require(changeRequestedTimestamp != 0); require(newMonitor != address(0)); monitor = newMonitor; newMonitor = address(0); changeRequestedTimestamp = 0; emit MonitorChangeFinished(monitor); } /// @notice Its possible to revert monitor to last used monitor function revertMonitor() public onlyAllowed { require(lastMonitor != address(0)); monitor = lastMonitor; emit MonitorChangeReverted(monitor); } /// @notice Allowed users are able to add new allowed user /// @param _user Address of user that will be allowed function addAllowed(address _user) public onlyAllowed { allowed[_user] = true; } /// @notice Allowed users are able to remove allowed user /// @dev owner is always allowed even if someone tries to remove it from allowed mapping /// @param _user Address of allowed user function removeAllowed(address _user) public onlyAllowed { allowed[_user] = false; } function setChangePeriod(uint _periodInDays) public onlyAllowed { require(_periodInDays * 1 days > CHANGE_PERIOD); CHANGE_PERIOD = _periodInDays * 1 days; } } contract MCDPriceVerifier is AdminAuth { OsmMom public osmMom = OsmMom(0x76416A4d5190d071bfed309861527431304aA14f); Manager public manager = Manager(0x5ef30b9986345249bc32d8928B7ee64DE9435E39); mapping(address => bool) public authorized; function verifyVaultNextPrice(uint _nextPrice, uint _cdpId) public view returns(bool) { require(authorized[msg.sender]); bytes32 ilk = manager.ilks(_cdpId); return verifyNextPrice(_nextPrice, ilk); } function verifyNextPrice(uint _nextPrice, bytes32 _ilk) public view returns(bool) { require(authorized[msg.sender]); address osmAddress = osmMom.osms(_ilk); uint whitelisted = Osm(osmAddress).bud(address(this)); // If contracts doesn't have access return true if (whitelisted != 1) return true; (bytes32 price, bool has) = Osm(osmAddress).peep(); return has ? uint(price) == _nextPrice : false; } function setAuthorized(address _address, bool _allowed) public onlyOwner { authorized[_address] = _allowed; } } abstract contract StaticV2 { enum Method { Boost, Repay } struct CdpHolder { uint128 minRatio; uint128 maxRatio; uint128 optimalRatioBoost; uint128 optimalRatioRepay; address owner; uint cdpId; bool boostEnabled; bool nextPriceEnabled; } struct SubPosition { uint arrPos; bool subscribed; } } contract SubscriptionsInterfaceV2 { function subscribe(uint _cdpId, uint128 _minRatio, uint128 _maxRatio, uint128 _optimalBoost, uint128 _optimalRepay, bool _boostEnabled, bool _nextPriceEnabled) external {} function unsubscribe(uint _cdpId) external {} } contract SubscriptionsProxyV2 { address public constant MONITOR_PROXY_ADDRESS = 0x7456f4218874eAe1aF8B83a64848A1B89fEB7d7C; address public constant OLD_SUBSCRIPTION = 0x83152CAA0d344a2Fd428769529e2d490A88f4393; address public constant FACTORY_ADDRESS = 0x5a15566417e6C1c9546523066500bDDBc53F88C7; function migrate(uint _cdpId, uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled, bool _nextPriceEnabled, address _subscriptions) public { SubscriptionsInterfaceV2(OLD_SUBSCRIPTION).unsubscribe(_cdpId); subscribe(_cdpId, _minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled, _nextPriceEnabled, _subscriptions); } function subscribe(uint _cdpId, uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled, bool _nextPriceEnabled, address _subscriptions) public { address currAuthority = address(DSAuth(address(this)).authority()); DSGuard guard = DSGuard(currAuthority); if (currAuthority == address(0)) { guard = DSGuardFactory(FACTORY_ADDRESS).newGuard(); DSAuth(address(this)).setAuthority(DSAuthority(address(guard))); } guard.permit(MONITOR_PROXY_ADDRESS, address(this), bytes4(keccak256("execute(address,bytes)"))); SubscriptionsInterfaceV2(_subscriptions).subscribe(_cdpId, _minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled, _nextPriceEnabled); } function update(uint _cdpId, uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled, bool _nextPriceEnabled, address _subscriptions) public { SubscriptionsInterfaceV2(_subscriptions).subscribe(_cdpId, _minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled, _nextPriceEnabled); } function unsubscribe(uint _cdpId, address _subscriptions) public { SubscriptionsInterfaceV2(_subscriptions).unsubscribe(_cdpId); } } contract SubscriptionsV2 is AdminAuth, StaticV2 { bytes32 internal constant ETH_ILK = 0x4554482d41000000000000000000000000000000000000000000000000000000; bytes32 internal constant BAT_ILK = 0x4241542d41000000000000000000000000000000000000000000000000000000; address public constant MANAGER_ADDRESS = 0x5ef30b9986345249bc32d8928B7ee64DE9435E39; address public constant VAT_ADDRESS = 0x35D1b3F3D7966A1DFe207aa4514C12a259A0492B; address public constant SPOTTER_ADDRESS = 0x65C79fcB50Ca1594B025960e539eD7A9a6D434A3; CdpHolder[] public subscribers; mapping (uint => SubPosition) public subscribersPos; mapping (bytes32 => uint) public minLimits; uint public changeIndex; Manager public manager = Manager(MANAGER_ADDRESS); Vat public vat = Vat(VAT_ADDRESS); Spotter public spotter = Spotter(SPOTTER_ADDRESS); MCDSaverProxy public saverProxy; event Subscribed(address indexed owner, uint cdpId); event Unsubscribed(address indexed owner, uint cdpId); event Updated(address indexed owner, uint cdpId); event ParamUpdates(address indexed owner, uint cdpId, uint128, uint128, uint128, uint128, bool boostEnabled); /// @param _saverProxy Address of the MCDSaverProxy contract constructor(address _saverProxy) public { saverProxy = MCDSaverProxy(payable(_saverProxy)); minLimits[ETH_ILK] = 1700000000000000000; minLimits[BAT_ILK] = 1700000000000000000; } /// @dev Called by the DSProxy contract which owns the CDP /// @notice Adds the users CDP in the list of subscriptions so it can be monitored /// @param _cdpId Id of the CDP /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalBoost Ratio amount which boost should target /// @param _optimalRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled /// @param _nextPriceEnabled Boolean determing if we can use nextPrice for this cdp function subscribe(uint _cdpId, uint128 _minRatio, uint128 _maxRatio, uint128 _optimalBoost, uint128 _optimalRepay, bool _boostEnabled, bool _nextPriceEnabled) external { require(isOwner(msg.sender, _cdpId), "Must be called by Cdp owner"); // if boost is not enabled, set max ratio to max uint uint128 localMaxRatio = _boostEnabled ? _maxRatio : uint128(-1); require(checkParams(manager.ilks(_cdpId), _minRatio, localMaxRatio), "Must be correct params"); SubPosition storage subInfo = subscribersPos[_cdpId]; CdpHolder memory subscription = CdpHolder({ minRatio: _minRatio, maxRatio: localMaxRatio, optimalRatioBoost: _optimalBoost, optimalRatioRepay: _optimalRepay, owner: msg.sender, cdpId: _cdpId, boostEnabled: _boostEnabled, nextPriceEnabled: _nextPriceEnabled }); changeIndex++; if (subInfo.subscribed) { subscribers[subInfo.arrPos] = subscription; emit Updated(msg.sender, _cdpId); emit ParamUpdates(msg.sender, _cdpId, _minRatio, localMaxRatio, _optimalBoost, _optimalRepay, _boostEnabled); } else { subscribers.push(subscription); subInfo.arrPos = subscribers.length - 1; subInfo.subscribed = true; emit Subscribed(msg.sender, _cdpId); } } /// @notice Called by the users DSProxy /// @dev Owner who subscribed cancels his subscription function unsubscribe(uint _cdpId) external { require(isOwner(msg.sender, _cdpId), "Must be called by Cdp owner"); _unsubscribe(_cdpId); } /// @dev Checks if the _owner is the owner of the CDP function isOwner(address _owner, uint _cdpId) internal view returns (bool) { return getOwner(_cdpId) == _owner; } /// @dev Checks limit for minimum ratio and if minRatio is bigger than max function checkParams(bytes32 _ilk, uint128 _minRatio, uint128 _maxRatio) internal view returns (bool) { if (_minRatio < minLimits[_ilk]) { return false; } if (_minRatio > _maxRatio) { return false; } return true; } /// @dev Internal method to remove a subscriber from the list function _unsubscribe(uint _cdpId) internal { require(subscribers.length > 0, "Must have subscribers in the list"); SubPosition storage subInfo = subscribersPos[_cdpId]; require(subInfo.subscribed, "Must first be subscribed"); uint lastCdpId = subscribers[subscribers.length - 1].cdpId; SubPosition storage subInfo2 = subscribersPos[lastCdpId]; subInfo2.arrPos = subInfo.arrPos; subscribers[subInfo.arrPos] = subscribers[subscribers.length - 1]; subscribers.pop(); changeIndex++; subInfo.subscribed = false; subInfo.arrPos = 0; emit Unsubscribed(msg.sender, _cdpId); } /// @notice Returns an address that owns the CDP /// @param _cdpId Id of the CDP function getOwner(uint _cdpId) public view returns(address) { return manager.owns(_cdpId); } /// @notice Helper method for the front to get all the info about the subscribed CDP function getSubscribedInfo(uint _cdpId) public view returns(bool, uint128, uint128, uint128, uint128, address, uint coll, uint debt) { SubPosition memory subInfo = subscribersPos[_cdpId]; if (!subInfo.subscribed) return (false, 0, 0, 0, 0, address(0), 0, 0); (coll, debt) = saverProxy.getCdpInfo(manager, _cdpId, manager.ilks(_cdpId)); CdpHolder memory subscriber = subscribers[subInfo.arrPos]; return ( true, subscriber.minRatio, subscriber.maxRatio, subscriber.optimalRatioRepay, subscriber.optimalRatioBoost, subscriber.owner, coll, debt ); } function getCdpHolder(uint _cdpId) public view returns (bool subscribed, CdpHolder memory) { SubPosition memory subInfo = subscribersPos[_cdpId]; if (!subInfo.subscribed) return (false, CdpHolder(0, 0, 0, 0, address(0), 0, false, false)); CdpHolder memory subscriber = subscribers[subInfo.arrPos]; return (true, subscriber); } /// @notice Helper method for the front to get the information about the ilk of a CDP function getIlkInfo(bytes32 _ilk, uint _cdpId) public view returns(bytes32 ilk, uint art, uint rate, uint spot, uint line, uint dust, uint mat, uint par) { // send either ilk or cdpId if (_ilk == bytes32(0)) { _ilk = manager.ilks(_cdpId); } ilk = _ilk; (,mat) = spotter.ilks(_ilk); par = spotter.par(); (art, rate, spot, line, dust) = vat.ilks(_ilk); } /// @notice Helper method to return all the subscribed CDPs function getSubscribers() public view returns (CdpHolder[] memory) { return subscribers; } /// @notice Helper method to return all the subscribed CDPs function getSubscribersByPage(uint _page, uint _perPage) public view returns (CdpHolder[] memory) { CdpHolder[] memory holders = new CdpHolder[](_perPage); uint start = _page * _perPage; uint end = start + _perPage; uint count = 0; for (uint i=start; i<end; i++) { holders[count] = subscribers[i]; count++; } return holders; } ////////////// ADMIN METHODS /////////////////// /// @notice Admin function to change a min. limit for an asset function changeMinRatios(bytes32 _ilk, uint _newRatio) public onlyOwner { minLimits[_ilk] = _newRatio; } /// @notice Admin function to unsubscribe a CDP function unsubscribeByAdmin(uint _cdpId) public onlyOwner { SubPosition storage subInfo = subscribersPos[_cdpId]; if (subInfo.subscribed) { _unsubscribe(_cdpId); } } } contract BidProxy { address public constant DAI_JOIN = 0x9759A6Ac90977b93B58547b4A71c78317f391A28; address public constant VAT_ADDRESS = 0x35D1b3F3D7966A1DFe207aa4514C12a259A0492B; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; function daiBid(uint _bidId, uint _amount, address _flipper) public { uint tendAmount = _amount * (10 ** 27); joinDai(_amount); (, uint lot, , , , , , ) = Flipper(_flipper).bids(_bidId); Vat(VAT_ADDRESS).hope(_flipper); Flipper(_flipper).tend(_bidId, lot, tendAmount); } function collateralBid(uint _bidId, uint _amount, address _flipper) public { (uint bid, , , , , , , ) = Flipper(_flipper).bids(_bidId); joinDai(bid / (10**27)); Vat(VAT_ADDRESS).hope(_flipper); Flipper(_flipper).dent(_bidId, _amount, bid); } function closeBid(uint _bidId, address _flipper, address _joinAddr) public { bytes32 ilk = Join(_joinAddr).ilk(); Flipper(_flipper).deal(_bidId); uint amount = Vat(VAT_ADDRESS).gem(ilk, address(this)); Vat(VAT_ADDRESS).hope(_joinAddr); Gem(_joinAddr).exit(msg.sender, amount); } function exitCollateral(address _joinAddr) public { bytes32 ilk = Join(_joinAddr).ilk(); uint amount = Vat(VAT_ADDRESS).gem(ilk, address(this)); Vat(VAT_ADDRESS).hope(_joinAddr); Gem(_joinAddr).exit(msg.sender, amount); } function exitDai() public { uint amount = Vat(VAT_ADDRESS).dai(address(this)) / (10**27); Vat(VAT_ADDRESS).hope(DAI_JOIN); Gem(DAI_JOIN).exit(msg.sender, amount); } function withdrawToken(address _token) public { uint balance = ERC20(_token).balanceOf(address(this)); ERC20(_token).transfer(msg.sender, balance); } function withdrawEth() public { uint balance = address(this).balance; msg.sender.transfer(balance); } function joinDai(uint _amount) internal { uint amountInVat = Vat(VAT_ADDRESS).dai(address(this)) / (10**27); if (_amount > amountInVat) { uint amountDiff = (_amount - amountInVat) + 1; ERC20(DAI_ADDRESS).transferFrom(msg.sender, address(this), amountDiff); ERC20(DAI_ADDRESS).approve(DAI_JOIN, amountDiff); Join(DAI_JOIN).join(address(this), amountDiff); } } } abstract contract IMCDSubscriptions { function unsubscribe(uint256 _cdpId) external virtual ; function subscribersPos(uint256 _cdpId) external virtual returns (uint256, bool); } abstract contract GemLike { function approve(address, uint256) public virtual; function transfer(address, uint256) public virtual; function transferFrom(address, address, uint256) public virtual; function deposit() public virtual payable; function withdraw(uint256) public virtual; } abstract contract ManagerLike { function cdpCan(address, uint256, address) public virtual view returns (uint256); function ilks(uint256) public virtual view returns (bytes32); function owns(uint256) public virtual view returns (address); function urns(uint256) public virtual view returns (address); function vat() public virtual view returns (address); function open(bytes32, address) public virtual returns (uint256); function give(uint256, address) public virtual; function cdpAllow(uint256, address, uint256) public virtual; function urnAllow(address, uint256) public virtual; function frob(uint256, int256, int256) public virtual; function flux(uint256, address, uint256) public virtual; function move(uint256, address, uint256) public virtual; function exit(address, uint256, address, uint256) public virtual; function quit(uint256, address) public virtual; function enter(address, uint256) public virtual; function shift(uint256, uint256) public virtual; } abstract contract VatLike { function can(address, address) public virtual view returns (uint256); function ilks(bytes32) public virtual view returns (uint256, uint256, uint256, uint256, uint256); function dai(address) public virtual view returns (uint256); function urns(bytes32, address) public virtual view returns (uint256, uint256); function frob(bytes32, address, address, address, int256, int256) public virtual; function hope(address) public virtual; function move(address, address, uint256) public virtual; } abstract contract GemJoinLike { function dec() public virtual returns (uint256); function gem() public virtual returns (GemLike); function join(address, uint256) public virtual payable; function exit(address, uint256) public virtual; } abstract contract GNTJoinLike { function bags(address) public virtual view returns (address); function make(address) public virtual returns (address); } abstract contract DaiJoinLike { function vat() public virtual returns (VatLike); function dai() public virtual returns (GemLike); function join(address, uint256) public virtual payable; function exit(address, uint256) public virtual; } abstract contract HopeLike { function hope(address) public virtual; function nope(address) public virtual; } abstract contract ProxyRegistryInterface { function build(address) public virtual returns (address); } abstract contract EndLike { function fix(bytes32) public virtual view returns (uint256); function cash(bytes32, uint256) public virtual; function free(bytes32) public virtual; function pack(uint256) public virtual; function skim(bytes32, address) public virtual; } abstract contract JugLike { function drip(bytes32) public virtual returns (uint256); } abstract contract PotLike { function pie(address) public virtual view returns (uint256); function drip() public virtual returns (uint256); function join(uint256) public virtual; function exit(uint256) public virtual; } abstract contract ProxyRegistryLike { function proxies(address) public virtual view returns (address); function build(address) public virtual returns (address); } abstract contract ProxyLike { function owner() public virtual view returns (address); } contract Common { uint256 constant RAY = 10**27; // Internal functions function mul(uint256 x, uint256 y) internal pure returns (uint256 z) { require(y == 0 || (z = x * y) / y == x, "mul-overflow"); } // Public functions // solhint-disable-next-line func-name-mixedcase function daiJoin_join(address apt, address urn, uint256 wad) public { // Gets DAI from the user's wallet DaiJoinLike(apt).dai().transferFrom(msg.sender, address(this), wad); // Approves adapter to take the DAI amount DaiJoinLike(apt).dai().approve(apt, wad); // Joins DAI into the vat DaiJoinLike(apt).join(urn, wad); } } contract MCDCreateProxyActions is Common { // Internal functions function sub(uint256 x, uint256 y) internal pure returns (uint256 z) { require((z = x - y) <= x, "sub-overflow"); } function toInt(uint256 x) internal pure returns (int256 y) { y = int256(x); require(y >= 0, "int-overflow"); } function toRad(uint256 wad) internal pure returns (uint256 rad) { rad = mul(wad, 10**27); } function convertTo18(address gemJoin, uint256 amt) internal returns (uint256 wad) { // For those collaterals that have less than 18 decimals precision we need to do the conversion before passing to frob function // Adapters will automatically handle the difference of precision wad = mul(amt, 10**(18 - GemJoinLike(gemJoin).dec())); } function _getDrawDart(address vat, address jug, address urn, bytes32 ilk, uint256 wad) internal returns (int256 dart) { // Updates stability fee rate uint256 rate = JugLike(jug).drip(ilk); // Gets DAI balance of the urn in the vat uint256 dai = VatLike(vat).dai(urn); // If there was already enough DAI in the vat balance, just exits it without adding more debt if (dai < mul(wad, RAY)) { // Calculates the needed dart so together with the existing dai in the vat is enough to exit wad amount of DAI tokens dart = toInt(sub(mul(wad, RAY), dai) / rate); // This is neeeded due lack of precision. It might need to sum an extra dart wei (for the given DAI wad amount) dart = mul(uint256(dart), rate) < mul(wad, RAY) ? dart + 1 : dart; } } function _getWipeDart(address vat, uint256 dai, address urn, bytes32 ilk) internal view returns (int256 dart) { // Gets actual rate from the vat (, uint256 rate, , , ) = VatLike(vat).ilks(ilk); // Gets actual art value of the urn (, uint256 art) = VatLike(vat).urns(ilk, urn); // Uses the whole dai balance in the vat to reduce the debt dart = toInt(dai / rate); // Checks the calculated dart is not higher than urn.art (total debt), otherwise uses its value dart = uint256(dart) <= art ? -dart : -toInt(art); } function _getWipeAllWad(address vat, address usr, address urn, bytes32 ilk) internal view returns (uint256 wad) { // Gets actual rate from the vat (, uint256 rate, , , ) = VatLike(vat).ilks(ilk); // Gets actual art value of the urn (, uint256 art) = VatLike(vat).urns(ilk, urn); // Gets actual dai amount in the urn uint256 dai = VatLike(vat).dai(usr); uint256 rad = sub(mul(art, rate), dai); wad = rad / RAY; // If the rad precision has some dust, it will need to request for 1 extra wad wei wad = mul(wad, RAY) < rad ? wad + 1 : wad; } // Public functions function transfer(address gem, address dst, uint256 wad) public { GemLike(gem).transfer(dst, wad); } // solhint-disable-next-line func-name-mixedcase function ethJoin_join(address apt, address urn) public payable { // Wraps ETH in WETH GemJoinLike(apt).gem().deposit{value: msg.value}(); // Approves adapter to take the WETH amount GemJoinLike(apt).gem().approve(address(apt), msg.value); // Joins WETH collateral into the vat GemJoinLike(apt).join(urn, msg.value); } // solhint-disable-next-line func-name-mixedcase function gemJoin_join(address apt, address urn, uint256 wad, bool transferFrom) public { // Only executes for tokens that have approval/transferFrom implementation if (transferFrom) { // Gets token from the user's wallet GemJoinLike(apt).gem().transferFrom(msg.sender, address(this), wad); // Approves adapter to take the token amount GemJoinLike(apt).gem().approve(apt, 0); GemJoinLike(apt).gem().approve(apt, wad); } // Joins token collateral into the vat GemJoinLike(apt).join(urn, wad); } function hope(address obj, address usr) public { HopeLike(obj).hope(usr); } function nope(address obj, address usr) public { HopeLike(obj).nope(usr); } function open(address manager, bytes32 ilk, address usr) public returns (uint256 cdp) { cdp = ManagerLike(manager).open(ilk, usr); } function give(address manager, uint256 cdp, address usr) public { ManagerLike(manager).give(cdp, usr); } function move(address manager, uint256 cdp, address dst, uint256 rad) public { ManagerLike(manager).move(cdp, dst, rad); } function frob(address manager, uint256 cdp, int256 dink, int256 dart) public { ManagerLike(manager).frob(cdp, dink, dart); } function lockETH(address manager, address ethJoin, uint256 cdp) public payable { // Receives ETH amount, converts it to WETH and joins it into the vat ethJoin_join(ethJoin, address(this)); // Locks WETH amount into the CDP VatLike(ManagerLike(manager).vat()).frob( ManagerLike(manager).ilks(cdp), ManagerLike(manager).urns(cdp), address(this), address(this), toInt(msg.value), 0 ); } function lockGem(address manager, address gemJoin, uint256 cdp, uint256 wad, bool transferFrom) public { // Takes token amount from user's wallet and joins into the vat gemJoin_join(gemJoin, address(this), wad, transferFrom); // Locks token amount into the CDP VatLike(ManagerLike(manager).vat()).frob( ManagerLike(manager).ilks(cdp), ManagerLike(manager).urns(cdp), address(this), address(this), toInt(convertTo18(gemJoin, wad)), 0 ); } function draw(address manager, address jug, address daiJoin, uint256 cdp, uint256 wad) public { address urn = ManagerLike(manager).urns(cdp); address vat = ManagerLike(manager).vat(); bytes32 ilk = ManagerLike(manager).ilks(cdp); // Generates debt in the CDP frob(manager, cdp, 0, _getDrawDart(vat, jug, urn, ilk, wad)); // Moves the DAI amount (balance in the vat in rad) to proxy's address move(manager, cdp, address(this), toRad(wad)); // Allows adapter to access to proxy's DAI balance in the vat if (VatLike(vat).can(address(this), address(daiJoin)) == 0) { VatLike(vat).hope(daiJoin); } // Exits DAI to the user's wallet as a token DaiJoinLike(daiJoin).exit(msg.sender, wad); } function lockETHAndDraw( address manager, address jug, address ethJoin, address daiJoin, uint256 cdp, uint256 wadD ) public payable { address urn = ManagerLike(manager).urns(cdp); address vat = ManagerLike(manager).vat(); bytes32 ilk = ManagerLike(manager).ilks(cdp); // Receives ETH amount, converts it to WETH and joins it into the vat ethJoin_join(ethJoin, urn); // Locks WETH amount into the CDP and generates debt frob(manager, cdp, toInt(msg.value), _getDrawDart(vat, jug, urn, ilk, wadD)); // Moves the DAI amount (balance in the vat in rad) to proxy's address move(manager, cdp, address(this), toRad(wadD)); // Allows adapter to access to proxy's DAI balance in the vat if (VatLike(vat).can(address(this), address(daiJoin)) == 0) { VatLike(vat).hope(daiJoin); } // Exits DAI to the user's wallet as a token DaiJoinLike(daiJoin).exit(msg.sender, wadD); } function openLockETHAndDraw( address manager, address jug, address ethJoin, address daiJoin, bytes32 ilk, uint256 wadD, address owner ) public payable returns (uint256 cdp) { cdp = open(manager, ilk, address(this)); lockETHAndDraw(manager, jug, ethJoin, daiJoin, cdp, wadD); give(manager, cdp, owner); } function lockGemAndDraw( address manager, address jug, address gemJoin, address daiJoin, uint256 cdp, uint256 wadC, uint256 wadD, bool transferFrom ) public { address urn = ManagerLike(manager).urns(cdp); address vat = ManagerLike(manager).vat(); bytes32 ilk = ManagerLike(manager).ilks(cdp); // Takes token amount from user's wallet and joins into the vat gemJoin_join(gemJoin, urn, wadC, transferFrom); // Locks token amount into the CDP and generates debt frob( manager, cdp, toInt(convertTo18(gemJoin, wadC)), _getDrawDart(vat, jug, urn, ilk, wadD) ); // Moves the DAI amount (balance in the vat in rad) to proxy's address move(manager, cdp, address(this), toRad(wadD)); // Allows adapter to access to proxy's DAI balance in the vat if (VatLike(vat).can(address(this), address(daiJoin)) == 0) { VatLike(vat).hope(daiJoin); } // Exits DAI to the user's wallet as a token DaiJoinLike(daiJoin).exit(msg.sender, wadD); } function openLockGemAndDraw( address manager, address jug, address gemJoin, address daiJoin, bytes32 ilk, uint256 wadC, uint256 wadD, bool transferFrom, address owner ) public returns (uint256 cdp) { cdp = open(manager, ilk, address(this)); lockGemAndDraw(manager, jug, gemJoin, daiJoin, cdp, wadC, wadD, transferFrom); give(manager, cdp, owner); } } contract MCDCreateTaker { using SafeERC20 for ERC20; address payable public constant MCD_CREATE_FLASH_LOAN = 0x78aF7A2Ee6C2240c748aDdc42aBc9A693559dcaF; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); // solhint-disable-next-line const-name-snakecase Manager public constant manager = Manager(0x5ef30b9986345249bc32d8928B7ee64DE9435E39); // solhint-disable-next-line const-name-snakecase DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); struct CreateData { uint collAmount; uint daiAmount; address joinAddr; } function openWithLoan( SaverExchangeCore.ExchangeData memory _exchangeData, CreateData memory _createData ) public payable { MCD_CREATE_FLASH_LOAN.transfer(msg.value); //0x fee if (!isEthJoinAddr(_createData.joinAddr)) { ERC20(getCollateralAddr(_createData.joinAddr)).safeTransferFrom(msg.sender, address(this), _createData.collAmount); ERC20(getCollateralAddr(_createData.joinAddr)).safeTransfer(MCD_CREATE_FLASH_LOAN, _createData.collAmount); } (uint[6] memory numData, address[5] memory addrData, bytes memory callData) = _packData(_createData, _exchangeData); bytes memory paramsData = abi.encode(numData, addrData, callData, address(this)); lendingPool.flashLoan(MCD_CREATE_FLASH_LOAN, DAI_ADDRESS, _createData.daiAmount, paramsData); logger.Log(address(this), msg.sender, "MCDCreate", abi.encode(manager.last(address(this)), _createData.collAmount, _createData.daiAmount)); } function getCollateralAddr(address _joinAddr) internal view returns (address) { return address(Join(_joinAddr).gem()); } /// @notice Checks if the join address is one of the Ether coll. types /// @param _joinAddr Join address to check function isEthJoinAddr(address _joinAddr) internal view returns (bool) { // if it's dai_join_addr don't check gem() it will fail if (_joinAddr == 0x9759A6Ac90977b93B58547b4A71c78317f391A28) return false; // if coll is weth it's and eth type coll if (address(Join(_joinAddr).gem()) == 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2) { return true; } return false; } function _packData( CreateData memory _createData, SaverExchangeCore.ExchangeData memory exchangeData ) internal pure returns (uint[6] memory numData, address[5] memory addrData, bytes memory callData) { numData = [ _createData.collAmount, _createData.daiAmount, exchangeData.srcAmount, exchangeData.destAmount, exchangeData.minPrice, exchangeData.price0x ]; addrData = [ exchangeData.srcAddr, exchangeData.destAddr, exchangeData.exchangeAddr, exchangeData.wrapper, _createData.joinAddr ]; callData = exchangeData.callData; } } contract MCDSaverProxyHelper is DSMath { /// @notice Returns a normalized debt _amount based on the current rate /// @param _amount Amount of dai to be normalized /// @param _rate Current rate of the stability fee /// @param _daiVatBalance Balance od Dai in the Vat for that CDP function normalizeDrawAmount(uint _amount, uint _rate, uint _daiVatBalance) internal pure returns (int dart) { if (_daiVatBalance < mul(_amount, RAY)) { dart = toPositiveInt(sub(mul(_amount, RAY), _daiVatBalance) / _rate); dart = mul(uint(dart), _rate) < mul(_amount, RAY) ? dart + 1 : dart; } } /// @notice Converts a number to Rad percision /// @param _wad The input number in wad percision function toRad(uint _wad) internal pure returns (uint) { return mul(_wad, 10 ** 27); } /// @notice Converts a number to 18 decimal percision /// @param _joinAddr Join address of the collateral /// @param _amount Number to be converted function convertTo18(address _joinAddr, uint256 _amount) internal view returns (uint256) { return mul(_amount, 10 ** (18 - Join(_joinAddr).dec())); } /// @notice Converts a uint to int and checks if positive /// @param _x Number to be converted function toPositiveInt(uint _x) internal pure returns (int y) { y = int(_x); require(y >= 0, "int-overflow"); } /// @notice Gets Dai amount in Vat which can be added to Cdp /// @param _vat Address of Vat contract /// @param _urn Urn of the Cdp /// @param _ilk Ilk of the Cdp function normalizePaybackAmount(address _vat, address _urn, bytes32 _ilk) internal view returns (int amount) { uint dai = Vat(_vat).dai(_urn); (, uint rate,,,) = Vat(_vat).ilks(_ilk); (, uint art) = Vat(_vat).urns(_ilk, _urn); amount = toPositiveInt(dai / rate); amount = uint(amount) <= art ? - amount : - toPositiveInt(art); } /// @notice Gets the whole debt of the CDP /// @param _vat Address of Vat contract /// @param _usr Address of the Dai holder /// @param _urn Urn of the Cdp /// @param _ilk Ilk of the Cdp function getAllDebt(address _vat, address _usr, address _urn, bytes32 _ilk) internal view returns (uint daiAmount) { (, uint rate,,,) = Vat(_vat).ilks(_ilk); (, uint art) = Vat(_vat).urns(_ilk, _urn); uint dai = Vat(_vat).dai(_usr); uint rad = sub(mul(art, rate), dai); daiAmount = rad / RAY; daiAmount = mul(daiAmount, RAY) < rad ? daiAmount + 1 : daiAmount; } /// @notice Gets the token address from the Join contract /// @param _joinAddr Address of the Join contract function getCollateralAddr(address _joinAddr) internal view returns (address) { return address(Join(_joinAddr).gem()); } /// @notice Checks if the join address is one of the Ether coll. types /// @param _joinAddr Join address to check function isEthJoinAddr(address _joinAddr) internal view returns (bool) { // if it's dai_join_addr don't check gem() it will fail if (_joinAddr == 0x9759A6Ac90977b93B58547b4A71c78317f391A28) return false; // if coll is weth it's and eth type coll if (address(Join(_joinAddr).gem()) == 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2) { return true; } return false; } /// @notice Gets CDP info (collateral, debt) /// @param _manager Manager contract /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP function getCdpInfo(Manager _manager, uint _cdpId, bytes32 _ilk) public view returns (uint, uint) { address vat = _manager.vat(); address urn = _manager.urns(_cdpId); (uint collateral, uint debt) = Vat(vat).urns(_ilk, urn); (,uint rate,,,) = Vat(vat).ilks(_ilk); return (collateral, rmul(debt, rate)); } /// @notice Address that owns the DSProxy that owns the CDP /// @param _manager Manager contract /// @param _cdpId Id of the CDP function getOwner(Manager _manager, uint _cdpId) public view returns (address) { DSProxy proxy = DSProxy(uint160(_manager.owns(_cdpId))); return proxy.owner(); } } abstract contract ProtocolInterface { function deposit(address _user, uint256 _amount) public virtual; function withdraw(address _user, uint256 _amount) public virtual; } contract SavingsLogger { event Deposit(address indexed sender, uint8 protocol, uint256 amount); event Withdraw(address indexed sender, uint8 protocol, uint256 amount); event Swap(address indexed sender, uint8 fromProtocol, uint8 toProtocol, uint256 amount); function logDeposit(address _sender, uint8 _protocol, uint256 _amount) external { emit Deposit(_sender, _protocol, _amount); } function logWithdraw(address _sender, uint8 _protocol, uint256 _amount) external { emit Withdraw(_sender, _protocol, _amount); } function logSwap(address _sender, uint8 _protocolFrom, uint8 _protocolTo, uint256 _amount) external { emit Swap(_sender, _protocolFrom, _protocolTo, _amount); } } contract AaveSavingsProtocol is ProtocolInterface, DSAuth { address public constant ADAI_ADDRESS = 0xfC1E690f61EFd961294b3e1Ce3313fBD8aa4f85d; address public constant AAVE_LENDING_POOL = 0x398eC7346DcD622eDc5ae82352F02bE94C62d119; address public constant AAVE_LENDING_POOL_CORE = 0x3dfd23A6c5E8BbcFc9581d2E864a68feb6a076d3; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; function deposit(address _user, uint _amount) public override { require(msg.sender == _user); // get dai from user require(ERC20(DAI_ADDRESS).transferFrom(_user, address(this), _amount)); ERC20(DAI_ADDRESS).approve(AAVE_LENDING_POOL_CORE, uint(-1)); ILendingPool(AAVE_LENDING_POOL).deposit(DAI_ADDRESS, _amount, 0); ERC20(ADAI_ADDRESS).transfer(_user, ERC20(ADAI_ADDRESS).balanceOf(address(this))); } function withdraw(address _user, uint _amount) public override { require(msg.sender == _user); require(ERC20(ADAI_ADDRESS).transferFrom(_user, address(this), _amount)); IAToken(ADAI_ADDRESS).redeem(_amount); // return dai we have to user ERC20(DAI_ADDRESS).transfer(_user, _amount); } } contract CompoundSavingsProtocol { address public constant NEW_CDAI_ADDRESS = 0x5d3a536E4D6DbD6114cc1Ead35777bAB948E3643; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; CTokenInterface public constant cDaiContract = CTokenInterface(NEW_CDAI_ADDRESS); function compDeposit(address _user, uint _amount) internal { // get dai from user require(ERC20(DAI_ADDRESS).transferFrom(_user, address(this), _amount)); // mainnet only ERC20(DAI_ADDRESS).approve(NEW_CDAI_ADDRESS, uint(-1)); // mint cDai require(cDaiContract.mint(_amount) == 0, "Failed Mint"); } function compWithdraw(address _user, uint _amount) internal { // transfer all users balance to this contract require(cDaiContract.transferFrom(_user, address(this), ERC20(NEW_CDAI_ADDRESS).balanceOf(_user))); // approve cDai to compound contract cDaiContract.approve(NEW_CDAI_ADDRESS, uint(-1)); // get dai from cDai contract require(cDaiContract.redeemUnderlying(_amount) == 0, "Reedem Failed"); // return to user balance we didn't spend uint cDaiBalance = cDaiContract.balanceOf(address(this)); if (cDaiBalance > 0) { cDaiContract.transfer(_user, cDaiBalance); } // return dai we have to user ERC20(DAI_ADDRESS).transfer(_user, _amount); } } abstract contract VatLike { function can(address, address) virtual public view returns (uint); function ilks(bytes32) virtual public view returns (uint, uint, uint, uint, uint); function dai(address) virtual public view returns (uint); function urns(bytes32, address) virtual public view returns (uint, uint); function frob(bytes32, address, address, address, int, int) virtual public; function hope(address) virtual public; function move(address, address, uint) virtual public; } abstract contract PotLike { function pie(address) virtual public view returns (uint); function drip() virtual public returns (uint); function join(uint) virtual public; function exit(uint) virtual public; } abstract contract GemLike { function approve(address, uint) virtual public; function transfer(address, uint) virtual public; function transferFrom(address, address, uint) virtual public; function deposit() virtual public payable; function withdraw(uint) virtual public; } abstract contract DaiJoinLike { function vat() virtual public returns (VatLike); function dai() virtual public returns (GemLike); function join(address, uint) virtual public payable; function exit(address, uint) virtual public; } contract DSRSavingsProtocol is DSMath { // Mainnet address public constant POT_ADDRESS = 0x197E90f9FAD81970bA7976f33CbD77088E5D7cf7; address public constant DAI_JOIN_ADDRESS = 0x9759A6Ac90977b93B58547b4A71c78317f391A28; function dsrDeposit(uint _amount, bool _fromUser) internal { VatLike vat = DaiJoinLike(DAI_JOIN_ADDRESS).vat(); uint chi = PotLike(POT_ADDRESS).drip(); daiJoin_join(DAI_JOIN_ADDRESS, address(this), _amount, _fromUser); if (vat.can(address(this), address(POT_ADDRESS)) == 0) { vat.hope(POT_ADDRESS); } PotLike(POT_ADDRESS).join(mul(_amount, RAY) / chi); } function dsrWithdraw(uint _amount, bool _toUser) internal { VatLike vat = DaiJoinLike(DAI_JOIN_ADDRESS).vat(); uint chi = PotLike(POT_ADDRESS).drip(); uint pie = mul(_amount, RAY) / chi; PotLike(POT_ADDRESS).exit(pie); uint balance = DaiJoinLike(DAI_JOIN_ADDRESS).vat().dai(address(this)); if (vat.can(address(this), address(DAI_JOIN_ADDRESS)) == 0) { vat.hope(DAI_JOIN_ADDRESS); } address to; if (_toUser) { to = msg.sender; } else { to = address(this); } if (_amount == uint(-1)) { DaiJoinLike(DAI_JOIN_ADDRESS).exit(to, mul(chi, pie) / RAY); } else { DaiJoinLike(DAI_JOIN_ADDRESS).exit( to, balance >= mul(_amount, RAY) ? _amount : balance / RAY ); } } function daiJoin_join(address apt, address urn, uint wad, bool _fromUser) internal { if (_fromUser) { DaiJoinLike(apt).dai().transferFrom(msg.sender, address(this), wad); } DaiJoinLike(apt).dai().approve(apt, wad); DaiJoinLike(apt).join(urn, wad); } } contract DydxSavingsProtocol is ProtocolInterface, DSAuth { address public constant SOLO_MARGIN_ADDRESS = 0x1E0447b19BB6EcFdAe1e4AE1694b0C3659614e4e; ISoloMargin public soloMargin; address public savingsProxy; uint daiMarketId = 3; constructor() public { soloMargin = ISoloMargin(SOLO_MARGIN_ADDRESS); } function addSavingsProxy(address _savingsProxy) public auth { savingsProxy = _savingsProxy; } function deposit(address _user, uint _amount) public override { require(msg.sender == _user); Account.Info[] memory accounts = new Account.Info[](1); accounts[0] = getAccount(_user, 0); Actions.ActionArgs[] memory actions = new Actions.ActionArgs[](1); Types.AssetAmount memory amount = Types.AssetAmount({ sign: true, denomination: Types.AssetDenomination.Wei, ref: Types.AssetReference.Delta, value: _amount }); actions[0] = Actions.ActionArgs({ actionType: Actions.ActionType.Deposit, accountId: 0, amount: amount, primaryMarketId: daiMarketId, otherAddress: _user, secondaryMarketId: 0, //not used otherAccountId: 0, //not used data: "" //not used }); soloMargin.operate(accounts, actions); } function withdraw(address _user, uint _amount) public override { require(msg.sender == _user); Account.Info[] memory accounts = new Account.Info[](1); accounts[0] = getAccount(_user, 0); Actions.ActionArgs[] memory actions = new Actions.ActionArgs[](1); Types.AssetAmount memory amount = Types.AssetAmount({ sign: false, denomination: Types.AssetDenomination.Wei, ref: Types.AssetReference.Delta, value: _amount }); actions[0] = Actions.ActionArgs({ actionType: Actions.ActionType.Withdraw, accountId: 0, amount: amount, primaryMarketId: daiMarketId, otherAddress: _user, secondaryMarketId: 0, //not used otherAccountId: 0, //not used data: "" //not used }); soloMargin.operate(accounts, actions); } function getWeiBalance(address _user, uint _index) public view returns(Types.Wei memory) { Types.Wei[] memory weiBalances; (,,weiBalances) = soloMargin.getAccountBalances(getAccount(_user, _index)); return weiBalances[daiMarketId]; } function getParBalance(address _user, uint _index) public view returns(Types.Par memory) { Types.Par[] memory parBalances; (,parBalances,) = soloMargin.getAccountBalances(getAccount(_user, _index)); return parBalances[daiMarketId]; } function getAccount(address _user, uint _index) public pure returns(Account.Info memory) { Account.Info memory account = Account.Info({ owner: _user, number: _index }); return account; } } abstract contract ISoloMargin { struct OperatorArg { address operator; bool trusted; } function operate( Account.Info[] memory accounts, Actions.ActionArgs[] memory actions ) public virtual; function getAccountBalances( Account.Info memory account ) public view virtual returns ( address[] memory, Types.Par[] memory, Types.Wei[] memory ); function setOperators( OperatorArg[] memory args ) public virtual; function getNumMarkets() public view virtual returns (uint256); function getMarketTokenAddress(uint256 marketId) public view virtual returns (address); } library Account { // ============ Enums ============ /* * Most-recently-cached account status. * * Normal: Can only be liquidated if the account values are violating the global margin-ratio. * Liquid: Can be liquidated no matter the account values. * Can be vaporized if there are no more positive account values. * Vapor: Has only negative (or zeroed) account values. Can be vaporized. * */ enum Status { Normal, Liquid, Vapor } // ============ Structs ============ // Represents the unique key that specifies an account struct Info { address owner; // The address that owns the account uint256 number; // A nonce that allows a single address to control many accounts } // The complete storage for any account struct Storage { mapping (uint256 => Types.Par) balances; // Mapping from marketId to principal Status status; } // ============ Library Functions ============ function equals( Info memory a, Info memory b ) internal pure returns (bool) { return a.owner == b.owner && a.number == b.number; } } library Actions { // ============ Constants ============ bytes32 constant FILE = "Actions"; // ============ Enums ============ enum ActionType { Deposit, // supply tokens Withdraw, // borrow tokens Transfer, // transfer balance between accounts Buy, // buy an amount of some token (externally) Sell, // sell an amount of some token (externally) Trade, // trade tokens against another account Liquidate, // liquidate an undercollateralized or expiring account Vaporize, // use excess tokens to zero-out a completely negative account Call // send arbitrary data to an address } enum AccountLayout { OnePrimary, TwoPrimary, PrimaryAndSecondary } enum MarketLayout { ZeroMarkets, OneMarket, TwoMarkets } // ============ Structs ============ /* * Arguments that are passed to Solo in an ordered list as part of a single operation. * Each ActionArgs has an actionType which specifies which action struct that this data will be * parsed into before being processed. */ struct ActionArgs { ActionType actionType; uint256 accountId; Types.AssetAmount amount; uint256 primaryMarketId; uint256 secondaryMarketId; address otherAddress; uint256 otherAccountId; bytes data; } // ============ Action Types ============ /* * Moves tokens from an address to Solo. Can either repay a borrow or provide additional supply. */ struct DepositArgs { Types.AssetAmount amount; Account.Info account; uint256 market; address from; } /* * Moves tokens from Solo to another address. Can either borrow tokens or reduce the amount * previously supplied. */ struct WithdrawArgs { Types.AssetAmount amount; Account.Info account; uint256 market; address to; } /* * Transfers balance between two accounts. The msg.sender must be an operator for both accounts. * The amount field applies to accountOne. * This action does not require any token movement since the trade is done internally to Solo. */ struct TransferArgs { Types.AssetAmount amount; Account.Info accountOne; Account.Info accountTwo; uint256 market; } /* * Acquires a certain amount of tokens by spending other tokens. Sends takerMarket tokens to the * specified exchangeWrapper contract and expects makerMarket tokens in return. The amount field * applies to the makerMarket. */ struct BuyArgs { Types.AssetAmount amount; Account.Info account; uint256 makerMarket; uint256 takerMarket; address exchangeWrapper; bytes orderData; } /* * Spends a certain amount of tokens to acquire other tokens. Sends takerMarket tokens to the * specified exchangeWrapper and expects makerMarket tokens in return. The amount field applies * to the takerMarket. */ struct SellArgs { Types.AssetAmount amount; Account.Info account; uint256 takerMarket; uint256 makerMarket; address exchangeWrapper; bytes orderData; } /* * Trades balances between two accounts using any external contract that implements the * AutoTrader interface. The AutoTrader contract must be an operator for the makerAccount (for * which it is trading on-behalf-of). The amount field applies to the makerAccount and the * inputMarket. This proposed change to the makerAccount is passed to the AutoTrader which will * quote a change for the makerAccount in the outputMarket (or will disallow the trade). * This action does not require any token movement since the trade is done internally to Solo. */ struct TradeArgs { Types.AssetAmount amount; Account.Info takerAccount; Account.Info makerAccount; uint256 inputMarket; uint256 outputMarket; address autoTrader; bytes tradeData; } /* * Each account must maintain a certain margin-ratio (specified globally). If the account falls * below this margin-ratio, it can be liquidated by any other account. This allows anyone else * (arbitrageurs) to repay any borrowed asset (owedMarket) of the liquidating account in * exchange for any collateral asset (heldMarket) of the liquidAccount. The ratio is determined * by the price ratio (given by the oracles) plus a spread (specified globally). Liquidating an * account also sets a flag on the account that the account is being liquidated. This allows * anyone to continue liquidating the account until there are no more borrows being taken by the * liquidating account. Liquidators do not have to liquidate the entire account all at once but * can liquidate as much as they choose. The liquidating flag allows liquidators to continue * liquidating the account even if it becomes collateralized through partial liquidation or * price movement. */ struct LiquidateArgs { Types.AssetAmount amount; Account.Info solidAccount; Account.Info liquidAccount; uint256 owedMarket; uint256 heldMarket; } /* * Similar to liquidate, but vaporAccounts are accounts that have only negative balances * remaining. The arbitrageur pays back the negative asset (owedMarket) of the vaporAccount in * exchange for a collateral asset (heldMarket) at a favorable spread. However, since the * liquidAccount has no collateral assets, the collateral must come from Solo's excess tokens. */ struct VaporizeArgs { Types.AssetAmount amount; Account.Info solidAccount; Account.Info vaporAccount; uint256 owedMarket; uint256 heldMarket; } /* * Passes arbitrary bytes of data to an external contract that implements the Callee interface. * Does not change any asset amounts. This function may be useful for setting certain variables * on layer-two contracts for certain accounts without having to make a separate Ethereum * transaction for doing so. Also, the second-layer contracts can ensure that the call is coming * from an operator of the particular account. */ struct CallArgs { Account.Info account; address callee; bytes data; } // ============ Helper Functions ============ function getMarketLayout( ActionType actionType ) internal pure returns (MarketLayout) { if ( actionType == Actions.ActionType.Deposit || actionType == Actions.ActionType.Withdraw || actionType == Actions.ActionType.Transfer ) { return MarketLayout.OneMarket; } else if (actionType == Actions.ActionType.Call) { return MarketLayout.ZeroMarkets; } return MarketLayout.TwoMarkets; } function getAccountLayout( ActionType actionType ) internal pure returns (AccountLayout) { if ( actionType == Actions.ActionType.Transfer || actionType == Actions.ActionType.Trade ) { return AccountLayout.TwoPrimary; } else if ( actionType == Actions.ActionType.Liquidate || actionType == Actions.ActionType.Vaporize ) { return AccountLayout.PrimaryAndSecondary; } return AccountLayout.OnePrimary; } // ============ Parsing Functions ============ function parseDepositArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (DepositArgs memory) { assert(args.actionType == ActionType.Deposit); return DepositArgs({ amount: args.amount, account: accounts[args.accountId], market: args.primaryMarketId, from: args.otherAddress }); } function parseWithdrawArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (WithdrawArgs memory) { assert(args.actionType == ActionType.Withdraw); return WithdrawArgs({ amount: args.amount, account: accounts[args.accountId], market: args.primaryMarketId, to: args.otherAddress }); } function parseTransferArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (TransferArgs memory) { assert(args.actionType == ActionType.Transfer); return TransferArgs({ amount: args.amount, accountOne: accounts[args.accountId], accountTwo: accounts[args.otherAccountId], market: args.primaryMarketId }); } function parseBuyArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (BuyArgs memory) { assert(args.actionType == ActionType.Buy); return BuyArgs({ amount: args.amount, account: accounts[args.accountId], makerMarket: args.primaryMarketId, takerMarket: args.secondaryMarketId, exchangeWrapper: args.otherAddress, orderData: args.data }); } function parseSellArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (SellArgs memory) { assert(args.actionType == ActionType.Sell); return SellArgs({ amount: args.amount, account: accounts[args.accountId], takerMarket: args.primaryMarketId, makerMarket: args.secondaryMarketId, exchangeWrapper: args.otherAddress, orderData: args.data }); } function parseTradeArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (TradeArgs memory) { assert(args.actionType == ActionType.Trade); return TradeArgs({ amount: args.amount, takerAccount: accounts[args.accountId], makerAccount: accounts[args.otherAccountId], inputMarket: args.primaryMarketId, outputMarket: args.secondaryMarketId, autoTrader: args.otherAddress, tradeData: args.data }); } function parseLiquidateArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (LiquidateArgs memory) { assert(args.actionType == ActionType.Liquidate); return LiquidateArgs({ amount: args.amount, solidAccount: accounts[args.accountId], liquidAccount: accounts[args.otherAccountId], owedMarket: args.primaryMarketId, heldMarket: args.secondaryMarketId }); } function parseVaporizeArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (VaporizeArgs memory) { assert(args.actionType == ActionType.Vaporize); return VaporizeArgs({ amount: args.amount, solidAccount: accounts[args.accountId], vaporAccount: accounts[args.otherAccountId], owedMarket: args.primaryMarketId, heldMarket: args.secondaryMarketId }); } function parseCallArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (CallArgs memory) { assert(args.actionType == ActionType.Call); return CallArgs({ account: accounts[args.accountId], callee: args.otherAddress, data: args.data }); } } library Math { using SafeMath for uint256; // ============ Constants ============ bytes32 constant FILE = "Math"; // ============ Library Functions ============ /* * Return target * (numerator / denominator). */ function getPartial( uint256 target, uint256 numerator, uint256 denominator ) internal pure returns (uint256) { return target.mul(numerator).div(denominator); } /* * Return target * (numerator / denominator), but rounded up. */ function getPartialRoundUp( uint256 target, uint256 numerator, uint256 denominator ) internal pure returns (uint256) { if (target == 0 || numerator == 0) { // SafeMath will check for zero denominator return SafeMath.div(0, denominator); } return target.mul(numerator).sub(1).div(denominator).add(1); } function to128( uint256 number ) internal pure returns (uint128) { uint128 result = uint128(number); Require.that( result == number, FILE, "Unsafe cast to uint128" ); return result; } function to96( uint256 number ) internal pure returns (uint96) { uint96 result = uint96(number); Require.that( result == number, FILE, "Unsafe cast to uint96" ); return result; } function to32( uint256 number ) internal pure returns (uint32) { uint32 result = uint32(number); Require.that( result == number, FILE, "Unsafe cast to uint32" ); return result; } function min( uint256 a, uint256 b ) internal pure returns (uint256) { return a < b ? a : b; } function max( uint256 a, uint256 b ) internal pure returns (uint256) { return a > b ? a : b; } } library Require { // ============ Constants ============ uint256 constant ASCII_ZERO = 48; // '0' uint256 constant ASCII_RELATIVE_ZERO = 87; // 'a' - 10 uint256 constant ASCII_LOWER_EX = 120; // 'x' bytes2 constant COLON = 0x3a20; // ': ' bytes2 constant COMMA = 0x2c20; // ', ' bytes2 constant LPAREN = 0x203c; // ' <' byte constant RPAREN = 0x3e; // '>' uint256 constant FOUR_BIT_MASK = 0xf; // ============ Library Functions ============ function that( bool must, bytes32 file, bytes32 reason ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason) ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, uint256 payloadA ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), RPAREN ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, uint256 payloadA, uint256 payloadB ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), COMMA, stringify(payloadB), RPAREN ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, address payloadA ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), RPAREN ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, address payloadA, uint256 payloadB ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), COMMA, stringify(payloadB), RPAREN ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, address payloadA, uint256 payloadB, uint256 payloadC ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), COMMA, stringify(payloadB), COMMA, stringify(payloadC), RPAREN ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, bytes32 payloadA ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), RPAREN ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, bytes32 payloadA, uint256 payloadB, uint256 payloadC ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), COMMA, stringify(payloadB), COMMA, stringify(payloadC), RPAREN ) ) ); } } // ============ Private Functions ============ function stringifyTruncated( bytes32 input ) private pure returns (bytes memory) { // put the input bytes into the result bytes memory result = abi.encodePacked(input); // determine the length of the input by finding the location of the last non-zero byte for (uint256 i = 32; i > 0; ) { // reverse-for-loops with unsigned integer /* solium-disable-next-line security/no-modify-for-iter-var */ i--; // find the last non-zero byte in order to determine the length if (result[i] != 0) { uint256 length = i + 1; /* solium-disable-next-line security/no-inline-assembly */ assembly { mstore(result, length) // r.length = length; } return result; } } // all bytes are zero return new bytes(0); } function stringify( uint256 input ) private pure returns (bytes memory) { if (input == 0) { return "0"; } // get the final string length uint256 j = input; uint256 length; while (j != 0) { length++; j /= 10; } // allocate the string bytes memory bstr = new bytes(length); // populate the string starting with the least-significant character j = input; for (uint256 i = length; i > 0; ) { // reverse-for-loops with unsigned integer /* solium-disable-next-line security/no-modify-for-iter-var */ i--; // take last decimal digit bstr[i] = byte(uint8(ASCII_ZERO + (j % 10))); // remove the last decimal digit j /= 10; } return bstr; } function stringify( address input ) private pure returns (bytes memory) { uint256 z = uint256(input); // addresses are "0x" followed by 20 bytes of data which take up 2 characters each bytes memory result = new bytes(42); // populate the result with "0x" result[0] = byte(uint8(ASCII_ZERO)); result[1] = byte(uint8(ASCII_LOWER_EX)); // for each byte (starting from the lowest byte), populate the result with two characters for (uint256 i = 0; i < 20; i++) { // each byte takes two characters uint256 shift = i * 2; // populate the least-significant character result[41 - shift] = char(z & FOUR_BIT_MASK); z = z >> 4; // populate the most-significant character result[40 - shift] = char(z & FOUR_BIT_MASK); z = z >> 4; } return result; } function stringify( bytes32 input ) private pure returns (bytes memory) { uint256 z = uint256(input); // bytes32 are "0x" followed by 32 bytes of data which take up 2 characters each bytes memory result = new bytes(66); // populate the result with "0x" result[0] = byte(uint8(ASCII_ZERO)); result[1] = byte(uint8(ASCII_LOWER_EX)); // for each byte (starting from the lowest byte), populate the result with two characters for (uint256 i = 0; i < 32; i++) { // each byte takes two characters uint256 shift = i * 2; // populate the least-significant character result[65 - shift] = char(z & FOUR_BIT_MASK); z = z >> 4; // populate the most-significant character result[64 - shift] = char(z & FOUR_BIT_MASK); z = z >> 4; } return result; } function char( uint256 input ) private pure returns (byte) { // return ASCII digit (0-9) if (input < 10) { return byte(uint8(input + ASCII_ZERO)); } // return ASCII letter (a-f) return byte(uint8(input + ASCII_RELATIVE_ZERO)); } } library Types { using Math for uint256; // ============ AssetAmount ============ enum AssetDenomination { Wei, // the amount is denominated in wei Par // the amount is denominated in par } enum AssetReference { Delta, // the amount is given as a delta from the current value Target // the amount is given as an exact number to end up at } struct AssetAmount { bool sign; // true if positive AssetDenomination denomination; AssetReference ref; uint256 value; } // ============ Par (Principal Amount) ============ // Total borrow and supply values for a market struct TotalPar { uint128 borrow; uint128 supply; } // Individual principal amount for an account struct Par { bool sign; // true if positive uint128 value; } function zeroPar() internal pure returns (Par memory) { return Par({ sign: false, value: 0 }); } function sub( Par memory a, Par memory b ) internal pure returns (Par memory) { return add(a, negative(b)); } function add( Par memory a, Par memory b ) internal pure returns (Par memory) { Par memory result; if (a.sign == b.sign) { result.sign = a.sign; result.value = SafeMath.add(a.value, b.value).to128(); } else { if (a.value >= b.value) { result.sign = a.sign; result.value = SafeMath.sub(a.value, b.value).to128(); } else { result.sign = b.sign; result.value = SafeMath.sub(b.value, a.value).to128(); } } return result; } function equals( Par memory a, Par memory b ) internal pure returns (bool) { if (a.value == b.value) { if (a.value == 0) { return true; } return a.sign == b.sign; } return false; } function negative( Par memory a ) internal pure returns (Par memory) { return Par({ sign: !a.sign, value: a.value }); } function isNegative( Par memory a ) internal pure returns (bool) { return !a.sign && a.value > 0; } function isPositive( Par memory a ) internal pure returns (bool) { return a.sign && a.value > 0; } function isZero( Par memory a ) internal pure returns (bool) { return a.value == 0; } // ============ Wei (Token Amount) ============ // Individual token amount for an account struct Wei { bool sign; // true if positive uint256 value; } function zeroWei() internal pure returns (Wei memory) { return Wei({ sign: false, value: 0 }); } function sub( Wei memory a, Wei memory b ) internal pure returns (Wei memory) { return add(a, negative(b)); } function add( Wei memory a, Wei memory b ) internal pure returns (Wei memory) { Wei memory result; if (a.sign == b.sign) { result.sign = a.sign; result.value = SafeMath.add(a.value, b.value); } else { if (a.value >= b.value) { result.sign = a.sign; result.value = SafeMath.sub(a.value, b.value); } else { result.sign = b.sign; result.value = SafeMath.sub(b.value, a.value); } } return result; } function equals( Wei memory a, Wei memory b ) internal pure returns (bool) { if (a.value == b.value) { if (a.value == 0) { return true; } return a.sign == b.sign; } return false; } function negative( Wei memory a ) internal pure returns (Wei memory) { return Wei({ sign: !a.sign, value: a.value }); } function isNegative( Wei memory a ) internal pure returns (bool) { return !a.sign && a.value > 0; } function isPositive( Wei memory a ) internal pure returns (bool) { return a.sign && a.value > 0; } function isZero( Wei memory a ) internal pure returns (bool) { return a.value == 0; } } contract FulcrumSavingsProtocol is ProtocolInterface, DSAuth { address public constant NEW_IDAI_ADDRESS = 0x493C57C4763932315A328269E1ADaD09653B9081; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; address public savingsProxy; uint public decimals = 10 ** 18; function addSavingsProxy(address _savingsProxy) public auth { savingsProxy = _savingsProxy; } function deposit(address _user, uint _amount) public override { require(msg.sender == _user); // get dai from user require(ERC20(DAI_ADDRESS).transferFrom(_user, address(this), _amount)); // approve dai to Fulcrum ERC20(DAI_ADDRESS).approve(NEW_IDAI_ADDRESS, uint(-1)); // mint iDai ITokenInterface(NEW_IDAI_ADDRESS).mint(_user, _amount); } function withdraw(address _user, uint _amount) public override { require(msg.sender == _user); // transfer all users tokens to our contract require(ERC20(NEW_IDAI_ADDRESS).transferFrom(_user, address(this), ITokenInterface(NEW_IDAI_ADDRESS).balanceOf(_user))); // approve iDai to that contract ERC20(NEW_IDAI_ADDRESS).approve(NEW_IDAI_ADDRESS, uint(-1)); uint tokenPrice = ITokenInterface(NEW_IDAI_ADDRESS).tokenPrice(); // get dai from iDai contract ITokenInterface(NEW_IDAI_ADDRESS).burn(_user, _amount * decimals / tokenPrice); // return all remaining tokens back to user require(ERC20(NEW_IDAI_ADDRESS).transfer(_user, ITokenInterface(NEW_IDAI_ADDRESS).balanceOf(address(this)))); } } contract ShifterRegistry is AdminAuth { mapping (string => address) public contractAddresses; bool public finalized; function changeContractAddr(string memory _contractName, address _protoAddr) public onlyOwner { require(!finalized); contractAddresses[_contractName] = _protoAddr; } function lock() public onlyOwner { finalized = true; } function getAddr(string memory _contractName) public view returns (address contractAddr) { contractAddr = contractAddresses[_contractName]; require(contractAddr != address(0), "No contract address registred"); } } library Address { function isContract(address account) internal view returns (bool) { // According to EIP-1052, 0x0 is the value returned for not-yet created accounts // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned // for accounts without code, i.e. `keccak256('')` bytes32 codehash; bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470; // solhint-disable-next-line no-inline-assembly assembly { codehash := extcodehash(account) } return (codehash != accountHash && codehash != 0x0); } function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return _functionCallWithValue(target, data, 0, errorMessage); } function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); return _functionCallWithValue(target, data, value, errorMessage); } function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) { require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: weiValue }(data); if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } contract BotRegistry is AdminAuth { mapping (address => bool) public botList; constructor() public { botList[0x776B4a13093e30B05781F97F6A4565B6aa8BE330] = true; botList[0xAED662abcC4FA3314985E67Ea993CAD064a7F5cF] = true; botList[0xa5d330F6619d6bF892A5B87D80272e1607b3e34D] = true; botList[0x5feB4DeE5150B589a7f567EA7CADa2759794A90A] = true; botList[0x7ca06417c1d6f480d3bB195B80692F95A6B66158] = true; } function setBot(address _botAddr, bool _state) public onlyOwner { botList[_botAddr] = _state; } } contract DFSProxy is Auth { string public constant NAME = "DFSProxy"; string public constant VERSION = "v0.1"; mapping(address => mapping(uint => bool)) public nonces; // --- EIP712 niceties --- bytes32 public DOMAIN_SEPARATOR; bytes32 public constant PERMIT_TYPEHASH = keccak256("callProxy(address _user,address _proxy,address _contract,bytes _txData,uint256 _nonce)"); constructor(uint256 chainId_) public { DOMAIN_SEPARATOR = keccak256(abi.encode( keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"), keccak256(bytes(NAME)), keccak256(bytes(VERSION)), chainId_, address(this) )); } function callProxy(address _user, address _proxy, address _contract, bytes calldata _txData, uint256 _nonce, uint8 _v, bytes32 _r, bytes32 _s) external payable onlyAuthorized { bytes32 digest = keccak256(abi.encodePacked( "\x19\x01", DOMAIN_SEPARATOR, keccak256(abi.encode(PERMIT_TYPEHASH, _user, _proxy, _contract, _txData, _nonce)) )); // user must be proxy owner require(DSProxyInterface(_proxy).owner() == _user); require(_user == ecrecover(digest, _v, _r, _s), "DFSProxy/user-not-valid"); require(!nonces[_user][_nonce], "DFSProxy/invalid-nonce"); nonces[_user][_nonce] = true; DSProxyInterface(_proxy).execute{value: msg.value}(_contract, _txData); } } contract Discount { address public owner; mapping(address => CustomServiceFee) public serviceFees; uint256 constant MAX_SERVICE_FEE = 400; struct CustomServiceFee { bool active; uint256 amount; } constructor() public { owner = msg.sender; } function isCustomFeeSet(address _user) public view returns (bool) { return serviceFees[_user].active; } function getCustomServiceFee(address _user) public view returns (uint256) { return serviceFees[_user].amount; } function setServiceFee(address _user, uint256 _fee) public { require(msg.sender == owner, "Only owner"); require(_fee >= MAX_SERVICE_FEE || _fee == 0); serviceFees[_user] = CustomServiceFee({active: true, amount: _fee}); } function disableServiceFee(address _user) public { require(msg.sender == owner, "Only owner"); serviceFees[_user] = CustomServiceFee({active: false, amount: 0}); } } contract DydxFlashLoanBase { using SafeMath for uint256; address public constant SOLO_MARGIN_ADDRESS = 0x1E0447b19BB6EcFdAe1e4AE1694b0C3659614e4e; function _getMarketIdFromTokenAddress(address token) internal view returns (uint256) { return 0; } function _getRepaymentAmountInternal(uint256 amount) internal view returns (uint256) { // Needs to be overcollateralize // Needs to provide +2 wei to be safe return amount.add(2); } function _getAccountInfo() internal view returns (Account.Info memory) { return Account.Info({owner: address(this), number: 1}); } function _getWithdrawAction(uint marketId, uint256 amount, address contractAddr) internal view returns (Actions.ActionArgs memory) { return Actions.ActionArgs({ actionType: Actions.ActionType.Withdraw, accountId: 0, amount: Types.AssetAmount({ sign: false, denomination: Types.AssetDenomination.Wei, ref: Types.AssetReference.Delta, value: amount }), primaryMarketId: marketId, secondaryMarketId: 0, otherAddress: contractAddr, otherAccountId: 0, data: "" }); } function _getCallAction(bytes memory data, address contractAddr) internal view returns (Actions.ActionArgs memory) { return Actions.ActionArgs({ actionType: Actions.ActionType.Call, accountId: 0, amount: Types.AssetAmount({ sign: false, denomination: Types.AssetDenomination.Wei, ref: Types.AssetReference.Delta, value: 0 }), primaryMarketId: 0, secondaryMarketId: 0, otherAddress: contractAddr, otherAccountId: 0, data: data }); } function _getDepositAction(uint marketId, uint256 amount, address contractAddr) internal view returns (Actions.ActionArgs memory) { return Actions.ActionArgs({ actionType: Actions.ActionType.Deposit, accountId: 0, amount: Types.AssetAmount({ sign: true, denomination: Types.AssetDenomination.Wei, ref: Types.AssetReference.Delta, value: amount }), primaryMarketId: marketId, secondaryMarketId: 0, otherAddress: contractAddr, otherAccountId: 0, data: "" }); } } contract ExchangeDataParser { function decodeExchangeData( SaverExchangeCore.ExchangeData memory exchangeData ) internal pure returns (address[4] memory, uint[4] memory, bytes memory) { return ( [exchangeData.srcAddr, exchangeData.destAddr, exchangeData.exchangeAddr, exchangeData.wrapper], [exchangeData.srcAmount, exchangeData.destAmount, exchangeData.minPrice, exchangeData.price0x], exchangeData.callData ); } function encodeExchangeData( address[4] memory exAddr, uint[4] memory exNum, bytes memory callData ) internal pure returns (SaverExchangeCore.ExchangeData memory) { return SaverExchangeCore.ExchangeData({ srcAddr: exAddr[0], destAddr: exAddr[1], srcAmount: exNum[0], destAmount: exNum[1], minPrice: exNum[2], wrapper: exAddr[3], exchangeAddr: exAddr[2], callData: callData, price0x: exNum[3] }); } } interface IFlashLoanReceiver { function executeOperation(address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external; } abstract contract ILendingPoolAddressesProvider { function getLendingPool() public view virtual returns (address); function setLendingPoolImpl(address _pool) public virtual; function getLendingPoolCore() public virtual view returns (address payable); function setLendingPoolCoreImpl(address _lendingPoolCore) public virtual; function getLendingPoolConfigurator() public virtual view returns (address); function setLendingPoolConfiguratorImpl(address _configurator) public virtual; function getLendingPoolDataProvider() public virtual view returns (address); function setLendingPoolDataProviderImpl(address _provider) public virtual; function getLendingPoolParametersProvider() public virtual view returns (address); function setLendingPoolParametersProviderImpl(address _parametersProvider) public virtual; function getTokenDistributor() public virtual view returns (address); function setTokenDistributor(address _tokenDistributor) public virtual; function getFeeProvider() public virtual view returns (address); function setFeeProviderImpl(address _feeProvider) public virtual; function getLendingPoolLiquidationManager() public virtual view returns (address); function setLendingPoolLiquidationManager(address _manager) public virtual; function getLendingPoolManager() public virtual view returns (address); function setLendingPoolManager(address _lendingPoolManager) public virtual; function getPriceOracle() public virtual view returns (address); function setPriceOracle(address _priceOracle) public virtual; function getLendingRateOracle() public view virtual returns (address); function setLendingRateOracle(address _lendingRateOracle) public virtual; } library EthAddressLib { function ethAddress() internal pure returns(address) { return 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; } } abstract contract FlashLoanReceiverBase is IFlashLoanReceiver { using SafeERC20 for ERC20; using SafeMath for uint256; ILendingPoolAddressesProvider public addressesProvider; constructor(ILendingPoolAddressesProvider _provider) public { addressesProvider = _provider; } receive () external virtual payable {} function transferFundsBackToPoolInternal(address _reserve, uint256 _amount) internal { address payable core = addressesProvider.getLendingPoolCore(); transferInternal(core,_reserve, _amount); } function transferInternal(address payable _destination, address _reserve, uint256 _amount) internal { if(_reserve == EthAddressLib.ethAddress()) { //solium-disable-next-line _destination.call{value: _amount}(""); return; } ERC20(_reserve).safeTransfer(_destination, _amount); } function getBalanceInternal(address _target, address _reserve) internal view returns(uint256) { if(_reserve == EthAddressLib.ethAddress()) { return _target.balance; } return ERC20(_reserve).balanceOf(_target); } } contract GasBurner { // solhint-disable-next-line const-name-snakecase GasTokenInterface public constant gasToken = GasTokenInterface(0x0000000000b3F879cb30FE243b4Dfee438691c04); modifier burnGas(uint _amount) { if (gasToken.balanceOf(address(this)) >= _amount) { gasToken.free(_amount); } _; } } library SafeERC20 { using SafeMath for uint256; using Address for address; function safeTransfer(ERC20 token, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } function safeTransferFrom(ERC20 token, address from, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value)); } /** * @dev Deprecated. This function has issues similar to the ones found in * {IERC20-approve}, and its usage is discouraged. */ function safeApprove(ERC20 token, address spender, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, 0)); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value)); } function safeIncreaseAllowance(ERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).add(value); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } function safeDecreaseAllowance(ERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero"); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } function _callOptionalReturn(ERC20 token, bytes memory data) private { bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed"); if (returndata.length > 0) { // Return data is optional // solhint-disable-next-line max-line-length require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } } } library SafeMath { function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } contract ZrxAllowlist is AdminAuth { mapping (address => bool) public zrxAllowlist; mapping(address => bool) private nonPayableAddrs; constructor() public { zrxAllowlist[0x6958F5e95332D93D21af0D7B9Ca85B8212fEE0A5] = true; zrxAllowlist[0x61935CbDd02287B511119DDb11Aeb42F1593b7Ef] = true; zrxAllowlist[0xDef1C0ded9bec7F1a1670819833240f027b25EfF] = true; zrxAllowlist[0x080bf510FCbF18b91105470639e9561022937712] = true; nonPayableAddrs[0x080bf510FCbF18b91105470639e9561022937712] = true; } function setAllowlistAddr(address _zrxAddr, bool _state) public onlyOwner { zrxAllowlist[_zrxAddr] = _state; } function isZrxAddr(address _zrxAddr) public view returns (bool) { return zrxAllowlist[_zrxAddr]; } function addNonPayableAddr(address _nonPayableAddr) public onlyOwner { nonPayableAddrs[_nonPayableAddr] = true; } function removeNonPayableAddr(address _nonPayableAddr) public onlyOwner { nonPayableAddrs[_nonPayableAddr] = false; } function isNonPayableAddr(address _addr) public view returns(bool) { return nonPayableAddrs[_addr]; } } contract AaveBasicProxy is GasBurner { using SafeERC20 for ERC20; address public constant ETH_ADDR = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant AAVE_LENDING_POOL_ADDRESSES = 0x24a42fD28C976A61Df5D00D0599C34c4f90748c8; uint16 public constant AAVE_REFERRAL_CODE = 64; /// @notice User deposits tokens to the Aave protocol /// @dev User needs to approve the DSProxy to pull the _tokenAddr tokens /// @param _tokenAddr The address of the token to be deposited /// @param _amount Amount of tokens to be deposited function deposit(address _tokenAddr, uint256 _amount) public burnGas(5) payable { address lendingPoolCore = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); uint ethValue = _amount; if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(this), _amount); approveToken(_tokenAddr, lendingPoolCore); ethValue = 0; } ILendingPool(lendingPool).deposit{value: ethValue}(_tokenAddr, _amount, AAVE_REFERRAL_CODE); setUserUseReserveAsCollateralIfNeeded(_tokenAddr); } /// @notice User withdraws tokens from the Aave protocol /// @param _tokenAddr The address of the token to be withdrawn /// @param _aTokenAddr ATokens to be withdrawn /// @param _amount Amount of tokens to be withdrawn /// @param _wholeAmount If true we will take the whole amount on chain function withdraw(address _tokenAddr, address _aTokenAddr, uint256 _amount, bool _wholeAmount) public burnGas(8) { uint256 amount = _wholeAmount ? ERC20(_aTokenAddr).balanceOf(address(this)) : _amount; IAToken(_aTokenAddr).redeem(amount); withdrawTokens(_tokenAddr); } /// @notice User borrows tokens to the Aave protocol /// @param _tokenAddr The address of the token to be borrowed /// @param _amount Amount of tokens to be borrowed /// @param _type Send 1 for variable rate and 2 for fixed rate function borrow(address _tokenAddr, uint256 _amount, uint256 _type) public burnGas(8) { address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); ILendingPool(lendingPool).borrow(_tokenAddr, _amount, _type, AAVE_REFERRAL_CODE); withdrawTokens(_tokenAddr); } /// @dev User needs to approve the DSProxy to pull the _tokenAddr tokens /// @notice User paybacks tokens to the Aave protocol /// @param _tokenAddr The address of the token to be paybacked /// @param _aTokenAddr ATokens to be paybacked /// @param _amount Amount of tokens to be payed back /// @param _wholeDebt If true the _amount will be set to the whole amount of the debt function payback(address _tokenAddr, address _aTokenAddr, uint256 _amount, bool _wholeDebt) public burnGas(3) payable { address lendingPoolCore = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); uint256 amount = _amount; (,uint256 borrowAmount,,,,,uint256 originationFee,,,) = ILendingPool(lendingPool).getUserReserveData(_tokenAddr, address(this)); if (_wholeDebt) { amount = borrowAmount + originationFee; } if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(this), amount); approveToken(_tokenAddr, lendingPoolCore); } ILendingPool(lendingPool).repay{value: msg.value}(_tokenAddr, amount, payable(address(this))); withdrawTokens(_tokenAddr); } /// @dev User needs to approve the DSProxy to pull the _tokenAddr tokens /// @notice User paybacks tokens to the Aave protocol /// @param _tokenAddr The address of the token to be paybacked /// @param _aTokenAddr ATokens to be paybacked /// @param _amount Amount of tokens to be payed back /// @param _wholeDebt If true the _amount will be set to the whole amount of the debt function paybackOnBehalf(address _tokenAddr, address _aTokenAddr, uint256 _amount, bool _wholeDebt, address payable _onBehalf) public burnGas(3) payable { address lendingPoolCore = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); uint256 amount = _amount; (,uint256 borrowAmount,,,,,uint256 originationFee,,,) = ILendingPool(lendingPool).getUserReserveData(_tokenAddr, _onBehalf); if (_wholeDebt) { amount = borrowAmount + originationFee; } if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(this), amount); if (originationFee > 0) { ERC20(_tokenAddr).safeTransfer(_onBehalf, originationFee); } approveToken(_tokenAddr, lendingPoolCore); } ILendingPool(lendingPool).repay{value: msg.value}(_tokenAddr, amount, _onBehalf); withdrawTokens(_tokenAddr); } /// @notice Helper method to withdraw tokens from the DSProxy /// @param _tokenAddr Address of the token to be withdrawn function withdrawTokens(address _tokenAddr) public { uint256 amount = _tokenAddr == ETH_ADDR ? address(this).balance : ERC20(_tokenAddr).balanceOf(address(this)); if (amount > 0) { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransfer(msg.sender, amount); } else { msg.sender.transfer(amount); } } } /// @notice Approves token contract to pull underlying tokens from the DSProxy /// @param _tokenAddr Token we are trying to approve /// @param _caller Address which will gain the approval function approveToken(address _tokenAddr, address _caller) internal { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeApprove(_caller, uint256(-1)); } } function setUserUseReserveAsCollateralIfNeeded(address _tokenAddr) public { address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); (,,,,,,,,,bool collateralEnabled) = ILendingPool(lendingPool).getUserReserveData(_tokenAddr, address(this)); if (!collateralEnabled) { ILendingPool(lendingPool).setUserUseReserveAsCollateral(_tokenAddr, true); } } function setUserUseReserveAsCollateral(address _tokenAddr, bool _true) public { address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); ILendingPool(lendingPool).setUserUseReserveAsCollateral(_tokenAddr, _true); } function swapBorrowRateMode(address _reserve) public { address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); ILendingPool(lendingPool).swapBorrowRateMode(_reserve); } } contract AaveLoanInfo is AaveSafetyRatio { struct LoanData { address user; uint128 ratio; address[] collAddr; address[] borrowAddr; uint256[] collAmounts; uint256[] borrowAmounts; } struct TokenInfo { address aTokenAddress; address underlyingTokenAddress; uint256 collateralFactor; uint256 price; } struct TokenInfoFull { address aTokenAddress; address underlyingTokenAddress; uint256 supplyRate; uint256 borrowRate; uint256 borrowRateStable; uint256 totalSupply; uint256 availableLiquidity; uint256 totalBorrow; uint256 collateralFactor; uint256 liquidationRatio; uint256 price; bool usageAsCollateralEnabled; } struct UserToken { address token; uint256 balance; uint256 borrows; uint256 borrowRateMode; bool enabledAsCollateral; } /// @notice Calcualted the ratio of coll/debt for a compound user /// @param _user Address of the user function getRatio(address _user) public view returns (uint256) { // For each asset the account is in return getSafetyRatio(_user); } /// @notice Fetches Aave prices for tokens /// @param _tokens Arr. of tokens for which to get the prices /// @return prices Array of prices function getPrices(address[] memory _tokens) public view returns (uint256[] memory prices) { address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); prices = new uint[](_tokens.length); for (uint256 i = 0; i < _tokens.length; ++i) { prices[i] = IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_tokens[i]); } } /// @notice Fetches Aave collateral factors for tokens /// @param _tokens Arr. of tokens for which to get the coll. factors /// @return collFactors Array of coll. factors function getCollFactors(address[] memory _tokens) public view returns (uint256[] memory collFactors) { address lendingPoolCoreAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); collFactors = new uint256[](_tokens.length); for (uint256 i = 0; i < _tokens.length; ++i) { (,collFactors[i],,) = ILendingPool(lendingPoolCoreAddress).getReserveConfiguration(_tokens[i]); } } function getTokenBalances(address _user, address[] memory _tokens) public view returns (UserToken[] memory userTokens) { address lendingPoolAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); userTokens = new UserToken[](_tokens.length); for (uint256 i = 0; i < _tokens.length; i++) { address asset = _tokens[i]; userTokens[i].token = asset; (userTokens[i].balance, userTokens[i].borrows,,userTokens[i].borrowRateMode,,,,,,userTokens[i].enabledAsCollateral) = ILendingPool(lendingPoolAddress).getUserReserveData(asset, _user); } } /// @notice Calcualted the ratio of coll/debt for an aave user /// @param _users Addresses of the user /// @return ratios Array of ratios function getRatios(address[] memory _users) public view returns (uint256[] memory ratios) { ratios = new uint256[](_users.length); for (uint256 i = 0; i < _users.length; ++i) { ratios[i] = getSafetyRatio(_users[i]); } } /// @notice Information about reserves /// @param _tokenAddresses Array of tokens addresses /// @return tokens Array of reserves infomartion function getTokensInfo(address[] memory _tokenAddresses) public view returns(TokenInfo[] memory tokens) { address lendingPoolCoreAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); tokens = new TokenInfo[](_tokenAddresses.length); for (uint256 i = 0; i < _tokenAddresses.length; ++i) { (,uint256 ltv,,) = ILendingPool(lendingPoolCoreAddress).getReserveConfiguration(_tokenAddresses[i]); tokens[i] = TokenInfo({ aTokenAddress: ILendingPool(lendingPoolCoreAddress).getReserveATokenAddress(_tokenAddresses[i]), underlyingTokenAddress: _tokenAddresses[i], collateralFactor: ltv, price: IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_tokenAddresses[i]) }); } } /// @notice Information about reserves /// @param _tokenAddresses Array of token addresses /// @return tokens Array of reserves infomartion function getFullTokensInfo(address[] memory _tokenAddresses) public view returns(TokenInfoFull[] memory tokens) { address lendingPoolCoreAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPoolAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); tokens = new TokenInfoFull[](_tokenAddresses.length); for (uint256 i = 0; i < _tokenAddresses.length; ++i) { (uint256 ltv, uint256 liqRatio,,, bool usageAsCollateralEnabled, bool borrowingEnabled, bool stableBorrowingEnabled,) = ILendingPool(lendingPoolAddress).getReserveConfigurationData(_tokenAddresses[i]); tokens[i] = TokenInfoFull({ aTokenAddress: ILendingPool(lendingPoolCoreAddress).getReserveATokenAddress(_tokenAddresses[i]), underlyingTokenAddress: _tokenAddresses[i], supplyRate: ILendingPool(lendingPoolCoreAddress).getReserveCurrentLiquidityRate(_tokenAddresses[i]), borrowRate: borrowingEnabled ? ILendingPool(lendingPoolCoreAddress).getReserveCurrentVariableBorrowRate(_tokenAddresses[i]) : 0, borrowRateStable: stableBorrowingEnabled ? ILendingPool(lendingPoolCoreAddress).getReserveCurrentStableBorrowRate(_tokenAddresses[i]) : 0, totalSupply: ILendingPool(lendingPoolCoreAddress).getReserveTotalLiquidity(_tokenAddresses[i]), availableLiquidity: ILendingPool(lendingPoolCoreAddress).getReserveAvailableLiquidity(_tokenAddresses[i]), totalBorrow: ILendingPool(lendingPoolCoreAddress).getReserveTotalBorrowsVariable(_tokenAddresses[i]), collateralFactor: ltv, liquidationRatio: liqRatio, price: IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_tokenAddresses[i]), usageAsCollateralEnabled: usageAsCollateralEnabled }); } } /// @notice Fetches all the collateral/debt address and amounts, denominated in ether /// @param _user Address of the user /// @return data LoanData information function getLoanData(address _user) public view returns (LoanData memory data) { address lendingPoolAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); address[] memory reserves = ILendingPool(lendingPoolAddress).getReserves(); data = LoanData({ user: _user, ratio: 0, collAddr: new address[](reserves.length), borrowAddr: new address[](reserves.length), collAmounts: new uint[](reserves.length), borrowAmounts: new uint[](reserves.length) }); uint64 collPos = 0; uint64 borrowPos = 0; for (uint64 i = 0; i < reserves.length; i++) { address reserve = reserves[i]; (uint256 aTokenBalance, uint256 borrowBalance,,,,,,,,) = ILendingPool(lendingPoolAddress).getUserReserveData(reserve, _user); uint256 price = IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(reserves[i]); if (aTokenBalance > 0) { uint256 userTokenBalanceEth = wmul(aTokenBalance, price) * (10 ** (18 - _getDecimals(reserve))); data.collAddr[collPos] = reserve; data.collAmounts[collPos] = userTokenBalanceEth; collPos++; } // Sum up debt in Eth if (borrowBalance > 0) { uint256 userBorrowBalanceEth = wmul(borrowBalance, price) * (10 ** (18 - _getDecimals(reserve))); data.borrowAddr[borrowPos] = reserve; data.borrowAmounts[borrowPos] = userBorrowBalanceEth; borrowPos++; } } data.ratio = uint128(getSafetyRatio(_user)); return data; } /// @notice Fetches all the collateral/debt address and amounts, denominated in ether /// @param _users Addresses of the user /// @return loans Array of LoanData information function getLoanDataArr(address[] memory _users) public view returns (LoanData[] memory loans) { loans = new LoanData[](_users.length); for (uint i = 0; i < _users.length; ++i) { loans[i] = getLoanData(_users[i]); } } } contract AaveMonitor is AdminAuth, DSMath, AaveSafetyRatio, GasBurner { using SafeERC20 for ERC20; enum Method { Boost, Repay } uint public REPAY_GAS_TOKEN = 19; uint public BOOST_GAS_TOKEN = 19; uint public MAX_GAS_PRICE = 200000000000; // 200 gwei uint public REPAY_GAS_COST = 2500000; uint public BOOST_GAS_COST = 2500000; address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; AaveMonitorProxy public aaveMonitorProxy; AaveSubscriptions public subscriptionsContract; address public aaveSaverProxy; DefisaverLogger public logger = DefisaverLogger(DEFISAVER_LOGGER); modifier onlyApproved() { require(BotRegistry(BOT_REGISTRY_ADDRESS).botList(msg.sender), "Not auth bot"); _; } /// @param _aaveMonitorProxy Proxy contracts that actually is authorized to call DSProxy /// @param _subscriptions Subscriptions contract for Aave positions /// @param _aaveSaverProxy Contract that actually performs Repay/Boost constructor(address _aaveMonitorProxy, address _subscriptions, address _aaveSaverProxy) public { aaveMonitorProxy = AaveMonitorProxy(_aaveMonitorProxy); subscriptionsContract = AaveSubscriptions(_subscriptions); aaveSaverProxy = _aaveSaverProxy; } /// @notice Bots call this method to repay for user when conditions are met /// @dev If the contract ownes gas token it will try and use it for gas price reduction /// @param _exData Exchange data /// @param _user The actual address that owns the Aave position function repayFor( SaverExchangeCore.ExchangeData memory _exData, address _user ) public payable onlyApproved burnGas(REPAY_GAS_TOKEN) { (bool isAllowed, uint ratioBefore) = canCall(Method.Repay, _user); require(isAllowed); // check if conditions are met uint256 gasCost = calcGasCost(REPAY_GAS_COST); aaveMonitorProxy.callExecute{value: msg.value}( _user, aaveSaverProxy, abi.encodeWithSignature( "repay((address,address,uint256,uint256,uint256,address,address,bytes,uint256),uint256)", _exData, gasCost ) ); (bool isGoodRatio, uint ratioAfter) = ratioGoodAfter(Method.Repay, _user); require(isGoodRatio); // check if the after result of the actions is good returnEth(); logger.Log(address(this), _user, "AutomaticAaveRepay", abi.encode(ratioBefore, ratioAfter)); } /// @notice Bots call this method to boost for user when conditions are met /// @dev If the contract ownes gas token it will try and use it for gas price reduction /// @param _exData Exchange data /// @param _user The actual address that owns the Aave position function boostFor( SaverExchangeCore.ExchangeData memory _exData, address _user ) public payable onlyApproved burnGas(BOOST_GAS_TOKEN) { (bool isAllowed, uint ratioBefore) = canCall(Method.Boost, _user); require(isAllowed); // check if conditions are met uint256 gasCost = calcGasCost(BOOST_GAS_COST); aaveMonitorProxy.callExecute{value: msg.value}( _user, aaveSaverProxy, abi.encodeWithSignature( "boost((address,address,uint256,uint256,uint256,address,address,bytes,uint256),uint256)", _exData, gasCost ) ); (bool isGoodRatio, uint ratioAfter) = ratioGoodAfter(Method.Boost, _user); require(isGoodRatio); // check if the after result of the actions is good returnEth(); logger.Log(address(this), _user, "AutomaticAaveBoost", abi.encode(ratioBefore, ratioAfter)); } /******************* INTERNAL METHODS ********************************/ function returnEth() internal { // return if some eth left if (address(this).balance > 0) { msg.sender.transfer(address(this).balance); } } /******************* STATIC METHODS ********************************/ /// @notice Checks if Boost/Repay could be triggered for the CDP /// @dev Called by AaveMonitor to enforce the min/max check /// @param _method Type of action to be called /// @param _user The actual address that owns the Aave position /// @return Boolean if it can be called and the ratio function canCall(Method _method, address _user) public view returns(bool, uint) { bool subscribed = subscriptionsContract.isSubscribed(_user); AaveSubscriptions.AaveHolder memory holder = subscriptionsContract.getHolder(_user); // check if cdp is subscribed if (!subscribed) return (false, 0); // check if boost and boost allowed if (_method == Method.Boost && !holder.boostEnabled) return (false, 0); uint currRatio = getSafetyRatio(_user); if (_method == Method.Repay) { return (currRatio < holder.minRatio, currRatio); } else if (_method == Method.Boost) { return (currRatio > holder.maxRatio, currRatio); } } /// @dev After the Boost/Repay check if the ratio doesn't trigger another call /// @param _method Type of action to be called /// @param _user The actual address that owns the Aave position /// @return Boolean if the recent action preformed correctly and the ratio function ratioGoodAfter(Method _method, address _user) public view returns(bool, uint) { AaveSubscriptions.AaveHolder memory holder; holder= subscriptionsContract.getHolder(_user); uint currRatio = getSafetyRatio(_user); if (_method == Method.Repay) { return (currRatio < holder.maxRatio, currRatio); } else if (_method == Method.Boost) { return (currRatio > holder.minRatio, currRatio); } } /// @notice Calculates gas cost (in Eth) of tx /// @dev Gas price is limited to MAX_GAS_PRICE to prevent attack of draining user CDP /// @param _gasAmount Amount of gas used for the tx function calcGasCost(uint _gasAmount) public view returns (uint) { uint gasPrice = tx.gasprice <= MAX_GAS_PRICE ? tx.gasprice : MAX_GAS_PRICE; return mul(gasPrice, _gasAmount); } /******************* OWNER ONLY OPERATIONS ********************************/ /// @notice Allows owner to change gas cost for boost operation, but only up to 3 millions /// @param _gasCost New gas cost for boost method function changeBoostGasCost(uint _gasCost) public onlyOwner { require(_gasCost < 3000000); BOOST_GAS_COST = _gasCost; } /// @notice Allows owner to change gas cost for repay operation, but only up to 3 millions /// @param _gasCost New gas cost for repay method function changeRepayGasCost(uint _gasCost) public onlyOwner { require(_gasCost < 3000000); REPAY_GAS_COST = _gasCost; } /// @notice Allows owner to change max gas price /// @param _maxGasPrice New max gas price function changeMaxGasPrice(uint _maxGasPrice) public onlyOwner { require(_maxGasPrice < 500000000000); MAX_GAS_PRICE = _maxGasPrice; } /// @notice Allows owner to change gas token amount /// @param _gasTokenAmount New gas token amount /// @param _repay true if repay gas token, false if boost gas token function changeGasTokenAmount(uint _gasTokenAmount, bool _repay) public onlyOwner { if (_repay) { REPAY_GAS_TOKEN = _gasTokenAmount; } else { BOOST_GAS_TOKEN = _gasTokenAmount; } } } contract AaveMonitorProxy is AdminAuth { using SafeERC20 for ERC20; uint public CHANGE_PERIOD; address public monitor; address public newMonitor; address public lastMonitor; uint public changeRequestedTimestamp; mapping(address => bool) public allowed; event MonitorChangeInitiated(address oldMonitor, address newMonitor); event MonitorChangeCanceled(); event MonitorChangeFinished(address monitor); event MonitorChangeReverted(address monitor); // if someone who is allowed become malicious, owner can't be changed modifier onlyAllowed() { require(allowed[msg.sender] || msg.sender == owner); _; } modifier onlyMonitor() { require (msg.sender == monitor); _; } constructor(uint _changePeriod) public { CHANGE_PERIOD = _changePeriod * 1 days; } /// @notice Only monitor contract is able to call execute on users proxy /// @param _owner Address of cdp owner (users DSProxy address) /// @param _aaveSaverProxy Address of AaveSaverProxy /// @param _data Data to send to AaveSaverProxy function callExecute(address _owner, address _aaveSaverProxy, bytes memory _data) public payable onlyMonitor { // execute reverts if calling specific method fails DSProxyInterface(_owner).execute{value: msg.value}(_aaveSaverProxy, _data); // return if anything left if (address(this).balance > 0) { msg.sender.transfer(address(this).balance); } } /// @notice Allowed users are able to set Monitor contract without any waiting period first time /// @param _monitor Address of Monitor contract function setMonitor(address _monitor) public onlyAllowed { require(monitor == address(0)); monitor = _monitor; } /// @notice Allowed users are able to start procedure for changing monitor /// @dev after CHANGE_PERIOD needs to call confirmNewMonitor to actually make a change /// @param _newMonitor address of new monitor function changeMonitor(address _newMonitor) public onlyAllowed { require(changeRequestedTimestamp == 0); changeRequestedTimestamp = now; lastMonitor = monitor; newMonitor = _newMonitor; emit MonitorChangeInitiated(lastMonitor, newMonitor); } /// @notice At any point allowed users are able to cancel monitor change function cancelMonitorChange() public onlyAllowed { require(changeRequestedTimestamp > 0); changeRequestedTimestamp = 0; newMonitor = address(0); emit MonitorChangeCanceled(); } /// @notice Anyone is able to confirm new monitor after CHANGE_PERIOD if process is started function confirmNewMonitor() public onlyAllowed { require((changeRequestedTimestamp + CHANGE_PERIOD) < now); require(changeRequestedTimestamp != 0); require(newMonitor != address(0)); monitor = newMonitor; newMonitor = address(0); changeRequestedTimestamp = 0; emit MonitorChangeFinished(monitor); } /// @notice Its possible to revert monitor to last used monitor function revertMonitor() public onlyAllowed { require(lastMonitor != address(0)); monitor = lastMonitor; emit MonitorChangeReverted(monitor); } /// @notice Allowed users are able to add new allowed user /// @param _user Address of user that will be allowed function addAllowed(address _user) public onlyAllowed { allowed[_user] = true; } /// @notice Allowed users are able to remove allowed user /// @dev owner is always allowed even if someone tries to remove it from allowed mapping /// @param _user Address of allowed user function removeAllowed(address _user) public onlyAllowed { allowed[_user] = false; } function setChangePeriod(uint _periodInDays) public onlyAllowed { require(_periodInDays * 1 days > CHANGE_PERIOD); CHANGE_PERIOD = _periodInDays * 1 days; } /// @notice In case something is left in contract, owner is able to withdraw it /// @param _token address of token to withdraw balance function withdrawToken(address _token) public onlyOwner { uint balance = ERC20(_token).balanceOf(address(this)); ERC20(_token).safeTransfer(msg.sender, balance); } /// @notice In case something is left in contract, owner is able to withdraw it function withdrawEth() public onlyOwner { uint balance = address(this).balance; msg.sender.transfer(balance); } } contract AaveSubscriptions is AdminAuth { struct AaveHolder { address user; uint128 minRatio; uint128 maxRatio; uint128 optimalRatioBoost; uint128 optimalRatioRepay; bool boostEnabled; } struct SubPosition { uint arrPos; bool subscribed; } AaveHolder[] public subscribers; mapping (address => SubPosition) public subscribersPos; uint public changeIndex; event Subscribed(address indexed user); event Unsubscribed(address indexed user); event Updated(address indexed user); event ParamUpdates(address indexed user, uint128, uint128, uint128, uint128, bool); /// @dev Called by the DSProxy contract which owns the Aave position /// @notice Adds the users Aave poistion in the list of subscriptions so it can be monitored /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalBoost Ratio amount which boost should target /// @param _optimalRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled function subscribe(uint128 _minRatio, uint128 _maxRatio, uint128 _optimalBoost, uint128 _optimalRepay, bool _boostEnabled) external { // if boost is not enabled, set max ratio to max uint uint128 localMaxRatio = _boostEnabled ? _maxRatio : uint128(-1); require(checkParams(_minRatio, localMaxRatio), "Must be correct params"); SubPosition storage subInfo = subscribersPos[msg.sender]; AaveHolder memory subscription = AaveHolder({ minRatio: _minRatio, maxRatio: localMaxRatio, optimalRatioBoost: _optimalBoost, optimalRatioRepay: _optimalRepay, user: msg.sender, boostEnabled: _boostEnabled }); changeIndex++; if (subInfo.subscribed) { subscribers[subInfo.arrPos] = subscription; emit Updated(msg.sender); emit ParamUpdates(msg.sender, _minRatio, localMaxRatio, _optimalBoost, _optimalRepay, _boostEnabled); } else { subscribers.push(subscription); subInfo.arrPos = subscribers.length - 1; subInfo.subscribed = true; emit Subscribed(msg.sender); } } /// @notice Called by the users DSProxy /// @dev Owner who subscribed cancels his subscription function unsubscribe() external { _unsubscribe(msg.sender); } /// @dev Checks limit if minRatio is bigger than max /// @param _minRatio Minimum ratio, bellow which repay can be triggered /// @param _maxRatio Maximum ratio, over which boost can be triggered /// @return Returns bool if the params are correct function checkParams(uint128 _minRatio, uint128 _maxRatio) internal pure returns (bool) { if (_minRatio > _maxRatio) { return false; } return true; } /// @dev Internal method to remove a subscriber from the list /// @param _user The actual address that owns the Aave position function _unsubscribe(address _user) internal { require(subscribers.length > 0, "Must have subscribers in the list"); SubPosition storage subInfo = subscribersPos[_user]; require(subInfo.subscribed, "Must first be subscribed"); address lastOwner = subscribers[subscribers.length - 1].user; SubPosition storage subInfo2 = subscribersPos[lastOwner]; subInfo2.arrPos = subInfo.arrPos; subscribers[subInfo.arrPos] = subscribers[subscribers.length - 1]; subscribers.pop(); // remove last element and reduce arr length changeIndex++; subInfo.subscribed = false; subInfo.arrPos = 0; emit Unsubscribed(msg.sender); } /// @dev Checks if the user is subscribed /// @param _user The actual address that owns the Aave position /// @return If the user is subscribed function isSubscribed(address _user) public view returns (bool) { SubPosition storage subInfo = subscribersPos[_user]; return subInfo.subscribed; } /// @dev Returns subscribtion information about a user /// @param _user The actual address that owns the Aave position /// @return Subscription information about the user if exists function getHolder(address _user) public view returns (AaveHolder memory) { SubPosition storage subInfo = subscribersPos[_user]; return subscribers[subInfo.arrPos]; } /// @notice Helper method to return all the subscribed CDPs /// @return List of all subscribers function getSubscribers() public view returns (AaveHolder[] memory) { return subscribers; } /// @notice Helper method for the frontend, returns all the subscribed CDPs paginated /// @param _page What page of subscribers you want /// @param _perPage Number of entries per page /// @return List of all subscribers for that page function getSubscribersByPage(uint _page, uint _perPage) public view returns (AaveHolder[] memory) { AaveHolder[] memory holders = new AaveHolder[](_perPage); uint start = _page * _perPage; uint end = start + _perPage; end = (end > holders.length) ? holders.length : end; uint count = 0; for (uint i = start; i < end; i++) { holders[count] = subscribers[i]; count++; } return holders; } ////////////// ADMIN METHODS /////////////////// /// @notice Admin function to unsubscribe a position /// @param _user The actual address that owns the Aave position function unsubscribeByAdmin(address _user) public onlyOwner { SubPosition storage subInfo = subscribersPos[_user]; if (subInfo.subscribed) { _unsubscribe(_user); } } } contract AaveSubscriptionsProxy is ProxyPermission { address public constant AAVE_SUBSCRIPTION_ADDRESS = 0xe08ff7A2BADb634F0b581E675E6B3e583De086FC; address public constant AAVE_MONITOR_PROXY = 0xfA560Dba3a8D0B197cA9505A2B98120DD89209AC; /// @notice Calls subscription contract and creates a DSGuard if non existent /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalRatioBoost Ratio amount which boost should target /// @param _optimalRatioRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled function subscribe( uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled ) public { givePermission(AAVE_MONITOR_PROXY); IAaveSubscription(AAVE_SUBSCRIPTION_ADDRESS).subscribe( _minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled); } /// @notice Calls subscription contract and updated existing parameters /// @dev If subscription is non existent this will create one /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalRatioBoost Ratio amount which boost should target /// @param _optimalRatioRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled function update( uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled ) public { IAaveSubscription(AAVE_SUBSCRIPTION_ADDRESS).subscribe(_minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled); } /// @notice Calls the subscription contract to unsubscribe the caller function unsubscribe() public { removePermission(AAVE_MONITOR_PROXY); IAaveSubscription(AAVE_SUBSCRIPTION_ADDRESS).unsubscribe(); } } contract AaveImport is AaveHelper, AdminAuth { using SafeERC20 for ERC20; address public constant WETH_ADDRESS = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address public constant BASIC_PROXY = 0x29F4af15ad64C509c4140324cFE71FB728D10d2B; address public constant AETH_ADDRESS = 0x3a3A65aAb0dd2A17E3F1947bA16138cd37d08c04; function callFunction( address sender, Account.Info memory account, bytes memory data ) public { ( address collateralToken, address borrowToken, uint256 ethAmount, address user, address proxy ) = abi.decode(data, (address,address,uint256,address,address)); // withdraw eth TokenInterface(WETH_ADDRESS).withdraw(ethAmount); address lendingPoolCoreAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); address aCollateralToken = ILendingPool(lendingPoolCoreAddress).getReserveATokenAddress(collateralToken); address aBorrowToken = ILendingPool(lendingPoolCoreAddress).getReserveATokenAddress(borrowToken); // deposit eth on behalf of proxy DSProxy(payable(proxy)).execute{value: ethAmount}(BASIC_PROXY, abi.encodeWithSignature("deposit(address,uint256)", ETH_ADDR, ethAmount)); // borrow needed amount to repay users borrow (,uint256 borrowAmount,,uint256 borrowRateMode,,,uint256 originationFee,,,) = ILendingPool(lendingPool).getUserReserveData(borrowToken, user); borrowAmount += originationFee; DSProxy(payable(proxy)).execute(BASIC_PROXY, abi.encodeWithSignature("borrow(address,uint256,uint256)", borrowToken, borrowAmount, borrowRateMode)); // payback on behalf of user ERC20(borrowToken).safeApprove(proxy, borrowAmount); DSProxy(payable(proxy)).execute(BASIC_PROXY, abi.encodeWithSignature("paybackOnBehalf(address,address,uint256,bool,address)", borrowToken, aBorrowToken, 0, true, user)); // pull tokens from user to proxy ERC20(aCollateralToken).safeTransferFrom(user, proxy, ERC20(aCollateralToken).balanceOf(user)); // enable as collateral DSProxy(payable(proxy)).execute(BASIC_PROXY, abi.encodeWithSignature("setUserUseReserveAsCollateralIfNeeded(address)", collateralToken)); // withdraw deposited eth DSProxy(payable(proxy)).execute(BASIC_PROXY, abi.encodeWithSignature("withdraw(address,address,uint256,bool)", ETH_ADDR, AETH_ADDRESS, ethAmount, false)); // deposit eth, get weth and return to sender TokenInterface(WETH_ADDRESS).deposit.value(address(this).balance)(); ERC20(WETH_ADDRESS).safeTransfer(proxy, ethAmount+2); } /// @dev if contract receive eth, convert it to WETH receive() external payable { // deposit eth and get weth if (msg.sender == owner) { TokenInterface(WETH_ADDRESS).deposit.value(address(this).balance)(); } } } contract AaveImportTaker is DydxFlashLoanBase, ProxyPermission { address public constant WETH_ADDR = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address payable public constant AAVE_IMPORT = 0x11c937fD367D75465DC211c367684d8d4520E6f9; address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; address public constant PROXY_REGISTRY_ADDRESS = 0x4678f0a6958e4D2Bc4F1BAF7Bc52E8F3564f3fE4; /// @notice Starts the process to move users position 1 collateral and 1 borrow /// @dev User must send 2 wei with this transaction /// @dev User must approve AaveImport to pull _aCollateralToken /// @param _collateralToken Collateral token we are moving to DSProxy /// @param _borrowToken Borrow token we are moving to DSProxy /// @param _ethAmount ETH amount that needs to be pulled from dydx function importLoan(address _collateralToken, address _borrowToken, uint _ethAmount) public { ISoloMargin solo = ISoloMargin(SOLO_MARGIN_ADDRESS); // Get marketId from token address uint256 marketId = _getMarketIdFromTokenAddress(WETH_ADDR); // Calculate repay amount (_amount + (2 wei)) // Approve transfer from uint256 repayAmount = _getRepaymentAmountInternal(_ethAmount); ERC20(WETH_ADDR).approve(SOLO_MARGIN_ADDRESS, repayAmount); Actions.ActionArgs[] memory operations = new Actions.ActionArgs[](3); operations[0] = _getWithdrawAction(marketId, _ethAmount, AAVE_IMPORT); operations[1] = _getCallAction( abi.encode(_collateralToken, _borrowToken, _ethAmount, msg.sender, address(this)), AAVE_IMPORT ); operations[2] = _getDepositAction(marketId, repayAmount, address(this)); Account.Info[] memory accountInfos = new Account.Info[](1); accountInfos[0] = _getAccountInfo(); givePermission(AAVE_IMPORT); solo.operate(accountInfos, operations); removePermission(AAVE_IMPORT); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "AaveImport", abi.encode(_collateralToken, _borrowToken)); } } contract CompoundBasicProxy is GasBurner { address public constant ETH_ADDR = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant COMPTROLLER_ADDR = 0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B; using SafeERC20 for ERC20; /// @notice User deposits tokens to the Compound protocol /// @dev User needs to approve the DSProxy to pull the _tokenAddr tokens /// @param _tokenAddr The address of the token to be deposited /// @param _cTokenAddr CTokens to be deposited /// @param _amount Amount of tokens to be deposited /// @param _inMarket True if the token is already in market for that address function deposit(address _tokenAddr, address _cTokenAddr, uint _amount, bool _inMarket) public burnGas(5) payable { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(this), _amount); } approveToken(_tokenAddr, _cTokenAddr); if (!_inMarket) { enterMarket(_cTokenAddr); } if (_tokenAddr != ETH_ADDR) { require(CTokenInterface(_cTokenAddr).mint(_amount) == 0); } else { CEtherInterface(_cTokenAddr).mint{value: msg.value}(); // reverts on fail } } /// @notice User withdraws tokens to the Compound protocol /// @param _tokenAddr The address of the token to be withdrawn /// @param _cTokenAddr CTokens to be withdrawn /// @param _amount Amount of tokens to be withdrawn /// @param _isCAmount If true _amount is cTokens if falls _amount is underlying tokens function withdraw(address _tokenAddr, address _cTokenAddr, uint _amount, bool _isCAmount) public burnGas(5) { if (_isCAmount) { require(CTokenInterface(_cTokenAddr).redeem(_amount) == 0); } else { require(CTokenInterface(_cTokenAddr).redeemUnderlying(_amount) == 0); } // withdraw funds to msg.sender if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransfer(msg.sender, ERC20(_tokenAddr).balanceOf(address(this))); } else { msg.sender.transfer(address(this).balance); } } /// @notice User borrows tokens to the Compound protocol /// @param _tokenAddr The address of the token to be borrowed /// @param _cTokenAddr CTokens to be borrowed /// @param _amount Amount of tokens to be borrowed /// @param _inMarket True if the token is already in market for that address function borrow(address _tokenAddr, address _cTokenAddr, uint _amount, bool _inMarket) public burnGas(8) { if (!_inMarket) { enterMarket(_cTokenAddr); } require(CTokenInterface(_cTokenAddr).borrow(_amount) == 0); // withdraw funds to msg.sender if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransfer(msg.sender, ERC20(_tokenAddr).balanceOf(address(this))); } else { msg.sender.transfer(address(this).balance); } } /// @dev User needs to approve the DSProxy to pull the _tokenAddr tokens /// @notice User paybacks tokens to the Compound protocol /// @param _tokenAddr The address of the token to be paybacked /// @param _cTokenAddr CTokens to be paybacked /// @param _amount Amount of tokens to be payedback /// @param _wholeDebt If true the _amount will be set to the whole amount of the debt function payback(address _tokenAddr, address _cTokenAddr, uint _amount, bool _wholeDebt) public burnGas(5) payable { approveToken(_tokenAddr, _cTokenAddr); if (_wholeDebt) { _amount = CTokenInterface(_cTokenAddr).borrowBalanceCurrent(address(this)); } if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(this), _amount); require(CTokenInterface(_cTokenAddr).repayBorrow(_amount) == 0); } else { CEtherInterface(_cTokenAddr).repayBorrow{value: msg.value}(); msg.sender.transfer(address(this).balance); // send back the extra eth } } /// @notice Helper method to withdraw tokens from the DSProxy /// @param _tokenAddr Address of the token to be withdrawn function withdrawTokens(address _tokenAddr) public { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransfer(msg.sender, ERC20(_tokenAddr).balanceOf(address(this))); } else { msg.sender.transfer(address(this).balance); } } /// @notice Enters the Compound market so it can be deposited/borrowed /// @param _cTokenAddr CToken address of the token function enterMarket(address _cTokenAddr) public { address[] memory markets = new address[](1); markets[0] = _cTokenAddr; ComptrollerInterface(COMPTROLLER_ADDR).enterMarkets(markets); } /// @notice Exits the Compound market so it can't be deposited/borrowed /// @param _cTokenAddr CToken address of the token function exitMarket(address _cTokenAddr) public { ComptrollerInterface(COMPTROLLER_ADDR).exitMarket(_cTokenAddr); } /// @notice Approves CToken contract to pull underlying tokens from the DSProxy /// @param _tokenAddr Token we are trying to approve /// @param _cTokenAddr Address which will gain the approval function approveToken(address _tokenAddr, address _cTokenAddr) internal { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeApprove(_cTokenAddr, uint(-1)); } } } contract CompoundSafetyRatio is Exponential, DSMath { // solhint-disable-next-line const-name-snakecase ComptrollerInterface public constant comp = ComptrollerInterface(0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B); /// @notice Calcualted the ratio of debt / adjusted collateral /// @param _user Address of the user function getSafetyRatio(address _user) public view returns (uint) { // For each asset the account is in address[] memory assets = comp.getAssetsIn(_user); address oracleAddr = comp.oracle(); uint sumCollateral = 0; uint sumBorrow = 0; for (uint i = 0; i < assets.length; i++) { address asset = assets[i]; (, uint cTokenBalance, uint borrowBalance, uint exchangeRateMantissa) = CTokenInterface(asset).getAccountSnapshot(_user); Exp memory oraclePrice; if (cTokenBalance != 0 || borrowBalance != 0) { oraclePrice = Exp({mantissa: CompoundOracleInterface(oracleAddr).getUnderlyingPrice(asset)}); } // Sum up collateral in Usd if (cTokenBalance != 0) { (, uint collFactorMantissa) = comp.markets(address(asset)); Exp memory collateralFactor = Exp({mantissa: collFactorMantissa}); Exp memory exchangeRate = Exp({mantissa: exchangeRateMantissa}); (, Exp memory tokensToUsd) = mulExp3(collateralFactor, exchangeRate, oraclePrice); (, sumCollateral) = mulScalarTruncateAddUInt(tokensToUsd, cTokenBalance, sumCollateral); } // Sum up debt in Usd if (borrowBalance != 0) { (, sumBorrow) = mulScalarTruncateAddUInt(oraclePrice, borrowBalance, sumBorrow); } } if (sumBorrow == 0) return uint(-1); uint borrowPowerUsed = (sumBorrow * 10**18) / sumCollateral; return wdiv(1e18, borrowPowerUsed); } } contract CompoundMonitor is AdminAuth, DSMath, CompoundSafetyRatio, GasBurner { using SafeERC20 for ERC20; enum Method { Boost, Repay } uint public REPAY_GAS_TOKEN = 20; uint public BOOST_GAS_TOKEN = 20; uint constant public MAX_GAS_PRICE = 500000000000; // 500 gwei uint public REPAY_GAS_COST = 2000000; uint public BOOST_GAS_COST = 2000000; address public constant GAS_TOKEN_INTERFACE_ADDRESS = 0x0000000000b3F879cb30FE243b4Dfee438691c04; address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; address public constant BOT_REGISTRY_ADDRESS = 0x637726f8b08a7ABE3aE3aCaB01A80E2d8ddeF77B; CompoundMonitorProxy public compoundMonitorProxy; CompoundSubscriptions public subscriptionsContract; address public compoundFlashLoanTakerAddress; DefisaverLogger public logger = DefisaverLogger(DEFISAVER_LOGGER); modifier onlyApproved() { require(BotRegistry(BOT_REGISTRY_ADDRESS).botList(msg.sender), "Not auth bot"); _; } /// @param _compoundMonitorProxy Proxy contracts that actually is authorized to call DSProxy /// @param _subscriptions Subscriptions contract for Compound positions /// @param _compoundFlashLoanTaker Contract that actually performs Repay/Boost constructor(address _compoundMonitorProxy, address _subscriptions, address _compoundFlashLoanTaker) public { compoundMonitorProxy = CompoundMonitorProxy(_compoundMonitorProxy); subscriptionsContract = CompoundSubscriptions(_subscriptions); compoundFlashLoanTakerAddress = _compoundFlashLoanTaker; } /// @notice Bots call this method to repay for user when conditions are met /// @dev If the contract ownes gas token it will try and use it for gas price reduction /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress, exchangeAddress] /// @param _user The actual address that owns the Compound position function repayFor( SaverExchangeCore.ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress address _user ) public payable onlyApproved burnGas(REPAY_GAS_TOKEN) { (bool isAllowed, uint ratioBefore) = canCall(Method.Repay, _user); require(isAllowed); // check if conditions are met uint256 gasCost = calcGasCost(REPAY_GAS_COST); compoundMonitorProxy.callExecute{value: msg.value}( _user, compoundFlashLoanTakerAddress, abi.encodeWithSignature( "repayWithLoan((address,address,uint256,uint256,uint256,address,address,bytes,uint256),address[2],uint256)", _exData, _cAddresses, gasCost ) ); (bool isGoodRatio, uint ratioAfter) = ratioGoodAfter(Method.Repay, _user); require(isGoodRatio); // check if the after result of the actions is good returnEth(); logger.Log(address(this), _user, "AutomaticCompoundRepay", abi.encode(ratioBefore, ratioAfter)); } /// @notice Bots call this method to boost for user when conditions are met /// @dev If the contract ownes gas token it will try and use it for gas price reduction /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress, exchangeAddress] /// @param _user The actual address that owns the Compound position function boostFor( SaverExchangeCore.ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress address _user ) public payable onlyApproved burnGas(BOOST_GAS_TOKEN) { (bool isAllowed, uint ratioBefore) = canCall(Method.Boost, _user); require(isAllowed); // check if conditions are met uint256 gasCost = calcGasCost(BOOST_GAS_COST); compoundMonitorProxy.callExecute{value: msg.value}( _user, compoundFlashLoanTakerAddress, abi.encodeWithSignature( "boostWithLoan((address,address,uint256,uint256,uint256,address,address,bytes,uint256),address[2],uint256)", _exData, _cAddresses, gasCost ) ); (bool isGoodRatio, uint ratioAfter) = ratioGoodAfter(Method.Boost, _user); require(isGoodRatio); // check if the after result of the actions is good returnEth(); logger.Log(address(this), _user, "AutomaticCompoundBoost", abi.encode(ratioBefore, ratioAfter)); } /******************* INTERNAL METHODS ********************************/ function returnEth() internal { // return if some eth left if (address(this).balance > 0) { msg.sender.transfer(address(this).balance); } } /******************* STATIC METHODS ********************************/ /// @notice Checks if Boost/Repay could be triggered for the CDP /// @dev Called by MCDMonitor to enforce the min/max check /// @param _method Type of action to be called /// @param _user The actual address that owns the Compound position /// @return Boolean if it can be called and the ratio function canCall(Method _method, address _user) public view returns(bool, uint) { bool subscribed = subscriptionsContract.isSubscribed(_user); CompoundSubscriptions.CompoundHolder memory holder = subscriptionsContract.getHolder(_user); // check if cdp is subscribed if (!subscribed) return (false, 0); // check if boost and boost allowed if (_method == Method.Boost && !holder.boostEnabled) return (false, 0); uint currRatio = getSafetyRatio(_user); if (_method == Method.Repay) { return (currRatio < holder.minRatio, currRatio); } else if (_method == Method.Boost) { return (currRatio > holder.maxRatio, currRatio); } } /// @dev After the Boost/Repay check if the ratio doesn't trigger another call /// @param _method Type of action to be called /// @param _user The actual address that owns the Compound position /// @return Boolean if the recent action preformed correctly and the ratio function ratioGoodAfter(Method _method, address _user) public view returns(bool, uint) { CompoundSubscriptions.CompoundHolder memory holder; holder= subscriptionsContract.getHolder(_user); uint currRatio = getSafetyRatio(_user); if (_method == Method.Repay) { return (currRatio < holder.maxRatio, currRatio); } else if (_method == Method.Boost) { return (currRatio > holder.minRatio, currRatio); } } /// @notice Calculates gas cost (in Eth) of tx /// @dev Gas price is limited to MAX_GAS_PRICE to prevent attack of draining user CDP /// @param _gasAmount Amount of gas used for the tx function calcGasCost(uint _gasAmount) public view returns (uint) { uint gasPrice = tx.gasprice <= MAX_GAS_PRICE ? tx.gasprice : MAX_GAS_PRICE; return mul(gasPrice, _gasAmount); } /******************* OWNER ONLY OPERATIONS ********************************/ /// @notice Allows owner to change gas cost for boost operation, but only up to 3 millions /// @param _gasCost New gas cost for boost method function changeBoostGasCost(uint _gasCost) public onlyOwner { require(_gasCost < 3000000); BOOST_GAS_COST = _gasCost; } /// @notice Allows owner to change gas cost for repay operation, but only up to 3 millions /// @param _gasCost New gas cost for repay method function changeRepayGasCost(uint _gasCost) public onlyOwner { require(_gasCost < 3000000); REPAY_GAS_COST = _gasCost; } /// @notice If any tokens gets stuck in the contract owner can withdraw it /// @param _tokenAddress Address of the ERC20 token /// @param _to Address of the receiver /// @param _amount The amount to be sent function transferERC20(address _tokenAddress, address _to, uint _amount) public onlyOwner { ERC20(_tokenAddress).safeTransfer(_to, _amount); } /// @notice If any Eth gets stuck in the contract owner can withdraw it /// @param _to Address of the receiver /// @param _amount The amount to be sent function transferEth(address payable _to, uint _amount) public onlyOwner { _to.transfer(_amount); } } contract CompBalance is Exponential, GasBurner { ComptrollerInterface public constant comp = ComptrollerInterface(0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B); address public constant COMP_ADDR = 0xc00e94Cb662C3520282E6f5717214004A7f26888; uint224 public constant compInitialIndex = 1e36; function claimComp(address _user, address[] memory _cTokensSupply, address[] memory _cTokensBorrow) public burnGas(8) { _claim(_user, _cTokensSupply, _cTokensBorrow); ERC20(COMP_ADDR).transfer(msg.sender, ERC20(COMP_ADDR).balanceOf(address(this))); } function _claim(address _user, address[] memory _cTokensSupply, address[] memory _cTokensBorrow) internal { address[] memory u = new address[](1); u[0] = _user; comp.claimComp(u, _cTokensSupply, false, true); comp.claimComp(u, _cTokensBorrow, true, false); } function getBalance(address _user, address[] memory _cTokens) public view returns (uint) { uint compBalance = 0; for(uint i = 0; i < _cTokens.length; ++i) { compBalance += getSuppyBalance(_cTokens[i], _user); compBalance += getBorrowBalance(_cTokens[i], _user); } compBalance += ERC20(COMP_ADDR).balanceOf(_user); return compBalance; } function getSuppyBalance(address _cToken, address _supplier) public view returns (uint supplierAccrued) { ComptrollerInterface.CompMarketState memory supplyState = comp.compSupplyState(_cToken); Double memory supplyIndex = Double({mantissa: supplyState.index}); Double memory supplierIndex = Double({mantissa: comp.compSupplierIndex(_cToken, _supplier)}); if (supplierIndex.mantissa == 0 && supplyIndex.mantissa > 0) { supplierIndex.mantissa = compInitialIndex; } Double memory deltaIndex = sub_(supplyIndex, supplierIndex); uint supplierTokens = CTokenInterface(_cToken).balanceOf(_supplier); uint supplierDelta = mul_(supplierTokens, deltaIndex); supplierAccrued = add_(comp.compAccrued(_supplier), supplierDelta); } function getBorrowBalance(address _cToken, address _borrower) public view returns (uint borrowerAccrued) { ComptrollerInterface.CompMarketState memory borrowState = comp.compBorrowState(_cToken); Double memory borrowIndex = Double({mantissa: borrowState.index}); Double memory borrowerIndex = Double({mantissa: comp.compBorrowerIndex(_cToken, _borrower)}); Exp memory marketBorrowIndex = Exp({mantissa: CTokenInterface(_cToken).borrowIndex()}); if (borrowerIndex.mantissa > 0) { Double memory deltaIndex = sub_(borrowIndex, borrowerIndex); uint borrowerAmount = div_(CTokenInterface(_cToken).borrowBalanceStored(_borrower), marketBorrowIndex); uint borrowerDelta = mul_(borrowerAmount, deltaIndex); borrowerAccrued = add_(comp.compAccrued(_borrower), borrowerDelta); } } } contract CompoundSaverHelper is DSMath, Exponential { using SafeERC20 for ERC20; address payable public constant WALLET_ADDR = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; address public constant DISCOUNT_ADDR = 0x1b14E8D511c9A4395425314f849bD737BAF8208F; uint public constant MANUAL_SERVICE_FEE = 400; // 0.25% Fee uint public constant AUTOMATIC_SERVICE_FEE = 333; // 0.3% Fee address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant CETH_ADDRESS = 0x4Ddc2D193948926D02f9B1fE9e1daa0718270ED5; address public constant COMPTROLLER = 0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B; address public constant COMPOUND_LOGGER = 0x3DD0CDf5fFA28C6847B4B276e2fD256046a44bb7; address public constant BOT_REGISTRY_ADDRESS = 0x637726f8b08a7ABE3aE3aCaB01A80E2d8ddeF77B; /// @notice Helper method to payback the Compound debt /// @dev If amount is bigger it will repay the whole debt and send the extra to the _user /// @param _amount Amount of tokens we want to repay /// @param _cBorrowToken Ctoken address we are repaying /// @param _borrowToken Token address we are repaying /// @param _user Owner of the compound position we are paying back function paybackDebt(uint _amount, address _cBorrowToken, address _borrowToken, address payable _user) internal { uint wholeDebt = CTokenInterface(_cBorrowToken).borrowBalanceCurrent(address(this)); if (_amount > wholeDebt) { if (_borrowToken == ETH_ADDRESS) { _user.transfer((_amount - wholeDebt)); } else { ERC20(_borrowToken).safeTransfer(_user, (_amount - wholeDebt)); } _amount = wholeDebt; } approveCToken(_borrowToken, _cBorrowToken); if (_borrowToken == ETH_ADDRESS) { CEtherInterface(_cBorrowToken).repayBorrow{value: _amount}(); } else { require(CTokenInterface(_cBorrowToken).repayBorrow(_amount) == 0); } } /// @notice Calculates the fee amount /// @param _amount Amount that is converted /// @param _user Actuall user addr not DSProxy /// @param _gasCost Ether amount of gas we are spending for tx /// @param _cTokenAddr CToken addr. of token we are getting for the fee /// @return feeAmount The amount we took for the fee function getFee(uint _amount, address _user, uint _gasCost, address _cTokenAddr) internal returns (uint feeAmount) { uint fee = MANUAL_SERVICE_FEE; if (BotRegistry(BOT_REGISTRY_ADDRESS).botList(tx.origin)) { fee = AUTOMATIC_SERVICE_FEE; } address tokenAddr = getUnderlyingAddr(_cTokenAddr); if (Discount(DISCOUNT_ADDR).isCustomFeeSet(_user)) { fee = Discount(DISCOUNT_ADDR).getCustomServiceFee(_user); } feeAmount = (fee == 0) ? 0 : (_amount / fee); if (_gasCost != 0) { address oracle = ComptrollerInterface(COMPTROLLER).oracle(); uint usdTokenPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(_cTokenAddr); uint ethPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(CETH_ADDRESS); uint tokenPriceInEth = wdiv(usdTokenPrice, ethPrice); _gasCost = wdiv(_gasCost, tokenPriceInEth); feeAmount = add(feeAmount, _gasCost); } // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } if (tokenAddr == ETH_ADDRESS) { WALLET_ADDR.transfer(feeAmount); } else { ERC20(tokenAddr).safeTransfer(WALLET_ADDR, feeAmount); } } /// @notice Calculates the gas cost of transaction and send it to wallet /// @param _amount Amount that is converted /// @param _gasCost Ether amount of gas we are spending for tx /// @param _cTokenAddr CToken addr. of token we are getting for the fee /// @return feeAmount The amount we took for the fee function getGasCost(uint _amount, uint _gasCost, address _cTokenAddr) internal returns (uint feeAmount) { address tokenAddr = getUnderlyingAddr(_cTokenAddr); if (_gasCost != 0) { address oracle = ComptrollerInterface(COMPTROLLER).oracle(); uint usdTokenPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(_cTokenAddr); uint ethPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(CETH_ADDRESS); uint tokenPriceInEth = wdiv(usdTokenPrice, ethPrice); feeAmount = wdiv(_gasCost, tokenPriceInEth); } // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } if (tokenAddr == ETH_ADDRESS) { WALLET_ADDR.transfer(feeAmount); } else { ERC20(tokenAddr).safeTransfer(WALLET_ADDR, feeAmount); } } /// @notice Enters the market for the collatera and borrow tokens /// @param _cTokenAddrColl Collateral address we are entering the market in /// @param _cTokenAddrBorrow Borrow address we are entering the market in function enterMarket(address _cTokenAddrColl, address _cTokenAddrBorrow) internal { address[] memory markets = new address[](2); markets[0] = _cTokenAddrColl; markets[1] = _cTokenAddrBorrow; ComptrollerInterface(COMPTROLLER).enterMarkets(markets); } /// @notice Approves CToken contract to pull underlying tokens from the DSProxy /// @param _tokenAddr Token we are trying to approve /// @param _cTokenAddr Address which will gain the approval function approveCToken(address _tokenAddr, address _cTokenAddr) internal { if (_tokenAddr != ETH_ADDRESS) { ERC20(_tokenAddr).safeApprove(_cTokenAddr, uint(-1)); } } /// @notice Returns the underlying address of the cToken asset /// @param _cTokenAddress cToken address /// @return Token address of the cToken specified function getUnderlyingAddr(address _cTokenAddress) internal returns (address) { if (_cTokenAddress == CETH_ADDRESS) { return ETH_ADDRESS; } else { return CTokenInterface(_cTokenAddress).underlying(); } } /// @notice Returns the owner of the DSProxy that called the contract function getUserAddress() internal view returns (address) { DSProxy proxy = DSProxy(uint160(address(this))); return proxy.owner(); } /// @notice Returns the maximum amount of collateral available to withdraw /// @dev Due to rounding errors the result is - 1% wei from the exact amount /// @param _cCollAddress Collateral we are getting the max value of /// @param _account Users account /// @return Returns the max. collateral amount in that token function getMaxCollateral(address _cCollAddress, address _account) public returns (uint) { (, uint liquidityInUsd, ) = ComptrollerInterface(COMPTROLLER).getAccountLiquidity(_account); uint usersBalance = CTokenInterface(_cCollAddress).balanceOfUnderlying(_account); address oracle = ComptrollerInterface(COMPTROLLER).oracle(); if (liquidityInUsd == 0) return usersBalance; CTokenInterface(_cCollAddress).accrueInterest(); (, uint collFactorMantissa) = ComptrollerInterface(COMPTROLLER).markets(_cCollAddress); Exp memory collateralFactor = Exp({mantissa: collFactorMantissa}); (, uint tokensToUsd) = divScalarByExpTruncate(liquidityInUsd, collateralFactor); uint usdPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(_cCollAddress); uint liqInToken = wdiv(tokensToUsd, usdPrice); if (liqInToken > usersBalance) return usersBalance; return sub(liqInToken, (liqInToken / 100)); // cut off 1% due to rounding issues } /// @notice Returns the maximum amount of borrow amount available /// @dev Due to rounding errors the result is - 1% wei from the exact amount /// @param _cBorrowAddress Borrow token we are getting the max value of /// @param _account Users account /// @return Returns the max. borrow amount in that token function getMaxBorrow(address _cBorrowAddress, address _account) public returns (uint) { (, uint liquidityInUsd, ) = ComptrollerInterface(COMPTROLLER).getAccountLiquidity(_account); address oracle = ComptrollerInterface(COMPTROLLER).oracle(); CTokenInterface(_cBorrowAddress).accrueInterest(); uint usdPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(_cBorrowAddress); uint liquidityInToken = wdiv(liquidityInUsd, usdPrice); return sub(liquidityInToken, (liquidityInToken / 100)); // cut off 1% due to rounding issues } } contract CompoundImportFlashLoan is FlashLoanReceiverBase { using SafeERC20 for ERC20; ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); address public constant COMPOUND_BORROW_PROXY = 0xb7EDC39bE76107e2Cc645f0f6a3D164f5e173Ee2; address public owner; constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public { owner = msg.sender; } /// @notice Called by Aave when sending back the FL amount /// @param _reserve The address of the borrowed token /// @param _amount Amount of FL tokens received /// @param _fee FL Aave fee /// @param _params The params that are sent from the original FL caller contract function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { ( address cCollateralToken, address cBorrowToken, address user, address proxy ) = abi.decode(_params, (address,address,address,address)); // approve FL tokens so we can repay them ERC20(_reserve).safeApprove(cBorrowToken, 0); ERC20(_reserve).safeApprove(cBorrowToken, uint(-1)); // repay compound debt require(CTokenInterface(cBorrowToken).repayBorrowBehalf(user, uint(-1)) == 0, "Repay borrow behalf fail"); // transfer cTokens to proxy uint cTokenBalance = CTokenInterface(cCollateralToken).balanceOf(user); require(CTokenInterface(cCollateralToken).transferFrom(user, proxy, cTokenBalance)); // borrow bytes memory proxyData = getProxyData(cCollateralToken, cBorrowToken, _reserve, (_amount + _fee)); DSProxyInterface(proxy).execute(COMPOUND_BORROW_PROXY, proxyData); // Repay the loan with the money DSProxy sent back transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); } /// @notice Formats function data call so we can call it through DSProxy /// @param _cCollToken CToken address of collateral /// @param _cBorrowToken CToken address we will borrow /// @param _borrowToken Token address we will borrow /// @param _amount Amount that will be borrowed /// @return proxyData Formated function call data function getProxyData(address _cCollToken, address _cBorrowToken, address _borrowToken, uint _amount) internal pure returns (bytes memory proxyData) { proxyData = abi.encodeWithSignature( "borrow(address,address,address,uint256)", _cCollToken, _cBorrowToken, _borrowToken, _amount); } function withdrawStuckFunds(address _tokenAddr, uint _amount) public { require(owner == msg.sender, "Must be owner"); if (_tokenAddr == 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE) { msg.sender.transfer(_amount); } else { ERC20(_tokenAddr).safeTransfer(owner, _amount); } } } contract CompoundImportTaker is CompoundSaverHelper, ProxyPermission, GasBurner { ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); address payable public constant COMPOUND_IMPORT_FLASH_LOAN = 0xaf9f8781A4c39Ce2122019fC05F22e3a662B0A32; address public constant PROXY_REGISTRY_ADDRESS = 0x4678f0a6958e4D2Bc4F1BAF7Bc52E8F3564f3fE4; DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); /// @notice Starts the process to move users position 1 collateral and 1 borrow /// @dev User must approve COMPOUND_IMPORT_FLASH_LOAN to pull _cCollateralToken /// @param _cCollateralToken Collateral we are moving to DSProxy /// @param _cBorrowToken Borrow token we are moving to DSProxy function importLoan(address _cCollateralToken, address _cBorrowToken) external burnGas(20) { address proxy = getProxy(); uint loanAmount = CTokenInterface(_cBorrowToken).borrowBalanceCurrent(msg.sender); bytes memory paramsData = abi.encode(_cCollateralToken, _cBorrowToken, msg.sender, proxy); givePermission(COMPOUND_IMPORT_FLASH_LOAN); lendingPool.flashLoan(COMPOUND_IMPORT_FLASH_LOAN, getUnderlyingAddr(_cBorrowToken), loanAmount, paramsData); removePermission(COMPOUND_IMPORT_FLASH_LOAN); logger.Log(address(this), msg.sender, "CompoundImport", abi.encode(loanAmount, 0, _cCollateralToken)); } /// @notice Gets proxy address, if user doesn't has DSProxy build it /// @return proxy DsProxy address function getProxy() internal returns (address proxy) { proxy = ProxyRegistryInterface(PROXY_REGISTRY_ADDRESS).proxies(msg.sender); if (proxy == address(0)) { proxy = ProxyRegistryInterface(PROXY_REGISTRY_ADDRESS).build(msg.sender); } } } contract CreamBasicProxy is GasBurner { address public constant ETH_ADDR = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant COMPTROLLER_ADDR = 0x3d5BC3c8d13dcB8bF317092d84783c2697AE9258; using SafeERC20 for ERC20; /// @notice User deposits tokens to the cream protocol /// @dev User needs to approve the DSProxy to pull the _tokenAddr tokens /// @param _tokenAddr The address of the token to be deposited /// @param _cTokenAddr CTokens to be deposited /// @param _amount Amount of tokens to be deposited /// @param _inMarket True if the token is already in market for that address function deposit(address _tokenAddr, address _cTokenAddr, uint _amount, bool _inMarket) public burnGas(5) payable { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(this), _amount); } approveToken(_tokenAddr, _cTokenAddr); if (!_inMarket) { enterMarket(_cTokenAddr); } if (_tokenAddr != ETH_ADDR) { require(CTokenInterface(_cTokenAddr).mint(_amount) == 0); } else { CEtherInterface(_cTokenAddr).mint{value: msg.value}(); // reverts on fail } } /// @notice User withdraws tokens to the cream protocol /// @param _tokenAddr The address of the token to be withdrawn /// @param _cTokenAddr CTokens to be withdrawn /// @param _amount Amount of tokens to be withdrawn /// @param _isCAmount If true _amount is cTokens if falls _amount is underlying tokens function withdraw(address _tokenAddr, address _cTokenAddr, uint _amount, bool _isCAmount) public burnGas(5) { if (_isCAmount) { require(CTokenInterface(_cTokenAddr).redeem(_amount) == 0); } else { require(CTokenInterface(_cTokenAddr).redeemUnderlying(_amount) == 0); } // withdraw funds to msg.sender if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransfer(msg.sender, ERC20(_tokenAddr).balanceOf(address(this))); } else { msg.sender.transfer(address(this).balance); } } /// @notice User borrows tokens to the cream protocol /// @param _tokenAddr The address of the token to be borrowed /// @param _cTokenAddr CTokens to be borrowed /// @param _amount Amount of tokens to be borrowed /// @param _inMarket True if the token is already in market for that address function borrow(address _tokenAddr, address _cTokenAddr, uint _amount, bool _inMarket) public burnGas(8) { if (!_inMarket) { enterMarket(_cTokenAddr); } require(CTokenInterface(_cTokenAddr).borrow(_amount) == 0); // withdraw funds to msg.sender if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransfer(msg.sender, ERC20(_tokenAddr).balanceOf(address(this))); } else { msg.sender.transfer(address(this).balance); } } /// @dev User needs to approve the DSProxy to pull the _tokenAddr tokens /// @notice User paybacks tokens to the cream protocol /// @param _tokenAddr The address of the token to be paybacked /// @param _cTokenAddr CTokens to be paybacked /// @param _amount Amount of tokens to be payedback /// @param _wholeDebt If true the _amount will be set to the whole amount of the debt function payback(address _tokenAddr, address _cTokenAddr, uint _amount, bool _wholeDebt) public burnGas(5) payable { approveToken(_tokenAddr, _cTokenAddr); if (_wholeDebt) { _amount = CTokenInterface(_cTokenAddr).borrowBalanceCurrent(address(this)); } if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(this), _amount); require(CTokenInterface(_cTokenAddr).repayBorrow(_amount) == 0); } else { CEtherInterface(_cTokenAddr).repayBorrow{value: msg.value}(); msg.sender.transfer(address(this).balance); // send back the extra eth } } /// @notice Helper method to withdraw tokens from the DSProxy /// @param _tokenAddr Address of the token to be withdrawn function withdrawTokens(address _tokenAddr) public { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransfer(msg.sender, ERC20(_tokenAddr).balanceOf(address(this))); } else { msg.sender.transfer(address(this).balance); } } /// @notice Enters the cream market so it can be deposited/borrowed /// @param _cTokenAddr CToken address of the token function enterMarket(address _cTokenAddr) public { address[] memory markets = new address[](1); markets[0] = _cTokenAddr; ComptrollerInterface(COMPTROLLER_ADDR).enterMarkets(markets); } /// @notice Exits the cream market so it can't be deposited/borrowed /// @param _cTokenAddr CToken address of the token function exitMarket(address _cTokenAddr) public { ComptrollerInterface(COMPTROLLER_ADDR).exitMarket(_cTokenAddr); } /// @notice Approves CToken contract to pull underlying tokens from the DSProxy /// @param _tokenAddr Token we are trying to approve /// @param _cTokenAddr Address which will gain the approval function approveToken(address _tokenAddr, address _cTokenAddr) internal { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeApprove(_cTokenAddr, uint(-1)); } } } contract CreamLoanInfo is CreamSafetyRatio { struct LoanData { address user; uint128 ratio; address[] collAddr; address[] borrowAddr; uint[] collAmounts; uint[] borrowAmounts; } struct TokenInfo { address cTokenAddress; address underlyingTokenAddress; uint collateralFactor; uint price; } struct TokenInfoFull { address underlyingTokenAddress; uint supplyRate; uint borrowRate; uint exchangeRate; uint marketLiquidity; uint totalSupply; uint totalBorrow; uint collateralFactor; uint price; } address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant CETH_ADDRESS = 0xD06527D5e56A3495252A528C4987003b712860eE; /// @notice Calcualted the ratio of coll/debt for a cream user /// @param _user Address of the user function getRatio(address _user) public view returns (uint) { // For each asset the account is in return getSafetyRatio(_user); } /// @notice Fetches cream prices for tokens /// @param _cTokens Arr. of cTokens for which to get the prices /// @return prices Array of prices function getPrices(address[] memory _cTokens) public view returns (uint[] memory prices) { prices = new uint[](_cTokens.length); address oracleAddr = comp.oracle(); for (uint i = 0; i < _cTokens.length; ++i) { prices[i] = CompoundOracleInterface(oracleAddr).getUnderlyingPrice(_cTokens[i]); } } /// @notice Fetches cream collateral factors for tokens /// @param _cTokens Arr. of cTokens for which to get the coll. factors /// @return collFactors Array of coll. factors function getCollFactors(address[] memory _cTokens) public view returns (uint[] memory collFactors) { collFactors = new uint[](_cTokens.length); for (uint i = 0; i < _cTokens.length; ++i) { (, collFactors[i]) = comp.markets(_cTokens[i]); } } /// @notice Fetches all the collateral/debt address and amounts, denominated in eth /// @param _user Address of the user /// @return data LoanData information function getLoanData(address _user) public view returns (LoanData memory data) { address[] memory assets = comp.getAssetsIn(_user); address oracleAddr = comp.oracle(); data = LoanData({ user: _user, ratio: 0, collAddr: new address[](assets.length), borrowAddr: new address[](assets.length), collAmounts: new uint[](assets.length), borrowAmounts: new uint[](assets.length) }); uint collPos = 0; uint borrowPos = 0; for (uint i = 0; i < assets.length; i++) { address asset = assets[i]; (, uint cTokenBalance, uint borrowBalance, uint exchangeRateMantissa) = CTokenInterface(asset).getAccountSnapshot(_user); Exp memory oraclePrice; if (cTokenBalance != 0 || borrowBalance != 0) { oraclePrice = Exp({mantissa: CompoundOracleInterface(oracleAddr).getUnderlyingPrice(asset)}); } // Sum up collateral in eth if (cTokenBalance != 0) { Exp memory exchangeRate = Exp({mantissa: exchangeRateMantissa}); (, Exp memory tokensToEth) = mulExp(exchangeRate, oraclePrice); data.collAddr[collPos] = asset; (, data.collAmounts[collPos]) = mulScalarTruncate(tokensToEth, cTokenBalance); collPos++; } // Sum up debt in eth if (borrowBalance != 0) { data.borrowAddr[borrowPos] = asset; (, data.borrowAmounts[borrowPos]) = mulScalarTruncate(oraclePrice, borrowBalance); borrowPos++; } } data.ratio = uint128(getSafetyRatio(_user)); return data; } function getTokenBalances(address _user, address[] memory _cTokens) public view returns (uint[] memory balances, uint[] memory borrows) { balances = new uint[](_cTokens.length); borrows = new uint[](_cTokens.length); for (uint i = 0; i < _cTokens.length; i++) { address asset = _cTokens[i]; (, uint cTokenBalance, uint borrowBalance, uint exchangeRateMantissa) = CTokenInterface(asset).getAccountSnapshot(_user); Exp memory exchangeRate = Exp({mantissa: exchangeRateMantissa}); (, balances[i]) = mulScalarTruncate(exchangeRate, cTokenBalance); borrows[i] = borrowBalance; } } /// @notice Fetches all the collateral/debt address and amounts, denominated in eth /// @param _users Addresses of the user /// @return loans Array of LoanData information function getLoanDataArr(address[] memory _users) public view returns (LoanData[] memory loans) { loans = new LoanData[](_users.length); for (uint i = 0; i < _users.length; ++i) { loans[i] = getLoanData(_users[i]); } } /// @notice Calcualted the ratio of coll/debt for a cream user /// @param _users Addresses of the user /// @return ratios Array of ratios function getRatios(address[] memory _users) public view returns (uint[] memory ratios) { ratios = new uint[](_users.length); for (uint i = 0; i < _users.length; ++i) { ratios[i] = getSafetyRatio(_users[i]); } } /// @notice Information about cTokens /// @param _cTokenAddresses Array of cTokens addresses /// @return tokens Array of cTokens infomartion function getTokensInfo(address[] memory _cTokenAddresses) public returns(TokenInfo[] memory tokens) { tokens = new TokenInfo[](_cTokenAddresses.length); address oracleAddr = comp.oracle(); for (uint i = 0; i < _cTokenAddresses.length; ++i) { (, uint collFactor) = comp.markets(_cTokenAddresses[i]); tokens[i] = TokenInfo({ cTokenAddress: _cTokenAddresses[i], underlyingTokenAddress: getUnderlyingAddr(_cTokenAddresses[i]), collateralFactor: collFactor, price: CompoundOracleInterface(oracleAddr).getUnderlyingPrice(_cTokenAddresses[i]) }); } } /// @notice Information about cTokens /// @param _cTokenAddresses Array of cTokens addresses /// @return tokens Array of cTokens infomartion function getFullTokensInfo(address[] memory _cTokenAddresses) public returns(TokenInfoFull[] memory tokens) { tokens = new TokenInfoFull[](_cTokenAddresses.length); address oracleAddr = comp.oracle(); for (uint i = 0; i < _cTokenAddresses.length; ++i) { (, uint collFactor) = comp.markets(_cTokenAddresses[i]); CTokenInterface cToken = CTokenInterface(_cTokenAddresses[i]); tokens[i] = TokenInfoFull({ underlyingTokenAddress: getUnderlyingAddr(_cTokenAddresses[i]), supplyRate: cToken.supplyRatePerBlock(), borrowRate: cToken.borrowRatePerBlock(), exchangeRate: cToken.exchangeRateCurrent(), marketLiquidity: cToken.getCash(), totalSupply: cToken.totalSupply(), totalBorrow: cToken.totalBorrowsCurrent(), collateralFactor: collFactor, price: CompoundOracleInterface(oracleAddr).getUnderlyingPrice(_cTokenAddresses[i]) }); } } /// @notice Returns the underlying address of the cToken asset /// @param _cTokenAddress cToken address /// @return Token address of the cToken specified function getUnderlyingAddr(address _cTokenAddress) internal returns (address) { if (_cTokenAddress == CETH_ADDRESS) { return ETH_ADDRESS; } else { return CTokenInterface(_cTokenAddress).underlying(); } } } contract CreamImportFlashLoan is FlashLoanReceiverBase { using SafeERC20 for ERC20; ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); address public constant CREAM_BORROW_PROXY = 0x87F198Ef6116CdBC5f36B581d212ad950b7e2Ddd; address public owner; constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public { owner = msg.sender; } /// @notice Called by Aave when sending back the FL amount /// @param _reserve The address of the borrowed token /// @param _amount Amount of FL tokens received /// @param _fee FL Aave fee /// @param _params The params that are sent from the original FL caller contract function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { ( address cCollateralToken, address cBorrowToken, address user, address proxy ) = abi.decode(_params, (address,address,address,address)); // approve FL tokens so we can repay them ERC20(_reserve).safeApprove(cBorrowToken, uint(-1)); // repay cream debt require(CTokenInterface(cBorrowToken).repayBorrowBehalf(user, uint(-1)) == 0, "Repay borrow behalf fail"); // transfer cTokens to proxy uint cTokenBalance = CTokenInterface(cCollateralToken).balanceOf(user); require(CTokenInterface(cCollateralToken).transferFrom(user, proxy, cTokenBalance)); // borrow bytes memory proxyData = getProxyData(cCollateralToken, cBorrowToken, _reserve, (_amount + _fee)); DSProxyInterface(proxy).execute(CREAM_BORROW_PROXY, proxyData); // Repay the loan with the money DSProxy sent back transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); } /// @notice Formats function data call so we can call it through DSProxy /// @param _cCollToken CToken address of collateral /// @param _cBorrowToken CToken address we will borrow /// @param _borrowToken Token address we will borrow /// @param _amount Amount that will be borrowed /// @return proxyData Formated function call data function getProxyData(address _cCollToken, address _cBorrowToken, address _borrowToken, uint _amount) internal pure returns (bytes memory proxyData) { proxyData = abi.encodeWithSignature( "borrow(address,address,address,uint256)", _cCollToken, _cBorrowToken, _borrowToken, _amount); } function withdrawStuckFunds(address _tokenAddr, uint _amount) public { require(owner == msg.sender, "Must be owner"); if (_tokenAddr == 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE) { msg.sender.transfer(_amount); } else { ERC20(_tokenAddr).safeTransfer(owner, _amount); } } } contract CreamImportTaker is CreamSaverHelper, ProxyPermission, GasBurner { ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); address payable public constant CREAM_IMPORT_FLASH_LOAN = 0x24F4aC0Fe758c45cf8425D8Fbdd608cca9A7dBf8; address public constant PROXY_REGISTRY_ADDRESS = 0x4678f0a6958e4D2Bc4F1BAF7Bc52E8F3564f3fE4; DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); /// @notice Starts the process to move users position 1 collateral and 1 borrow /// @dev User must approve cream_IMPORT_FLASH_LOAN to pull _cCollateralToken /// @param _cCollateralToken Collateral we are moving to DSProxy /// @param _cBorrowToken Borrow token we are moving to DSProxy function importLoan(address _cCollateralToken, address _cBorrowToken) external burnGas(20) { address proxy = getProxy(); uint loanAmount = CTokenInterface(_cBorrowToken).borrowBalanceCurrent(msg.sender); bytes memory paramsData = abi.encode(_cCollateralToken, _cBorrowToken, msg.sender, proxy); givePermission(CREAM_IMPORT_FLASH_LOAN); lendingPool.flashLoan(CREAM_IMPORT_FLASH_LOAN, getUnderlyingAddr(_cBorrowToken), loanAmount, paramsData); removePermission(CREAM_IMPORT_FLASH_LOAN); logger.Log(address(this), msg.sender, "CreamImport", abi.encode(loanAmount, 0, _cCollateralToken)); } /// @notice Gets proxy address, if user doesn't has DSProxy build it /// @return proxy DsProxy address function getProxy() internal returns (address proxy) { proxy = ProxyRegistryInterface(PROXY_REGISTRY_ADDRESS).proxies(msg.sender); if (proxy == address(0)) { proxy = ProxyRegistryInterface(PROXY_REGISTRY_ADDRESS).build(msg.sender); } } } contract SaverExchangeCore is SaverExchangeHelper, DSMath { // first is empty to keep the legacy order in place enum ExchangeType { _, OASIS, KYBER, UNISWAP, ZEROX } enum ActionType { SELL, BUY } struct ExchangeData { address srcAddr; address destAddr; uint srcAmount; uint destAmount; uint minPrice; address wrapper; address exchangeAddr; bytes callData; uint256 price0x; } /// @notice Internal method that preforms a sell on 0x/on-chain /// @dev Usefull for other DFS contract to integrate for exchanging /// @param exData Exchange data struct /// @return (address, uint) Address of the wrapper used and destAmount function _sell(ExchangeData memory exData) internal returns (address, uint) { address wrapper; uint swapedTokens; bool success; uint tokensLeft = exData.srcAmount; // if selling eth, convert to weth if (exData.srcAddr == KYBER_ETH_ADDRESS) { exData.srcAddr = ethToWethAddr(exData.srcAddr); TokenInterface(WETH_ADDRESS).deposit.value(exData.srcAmount)(); } // Try 0x first and then fallback on specific wrapper if (exData.price0x > 0) { approve0xProxy(exData.srcAddr, exData.srcAmount); uint ethAmount = getProtocolFee(exData.srcAddr, exData.srcAmount); (success, swapedTokens, tokensLeft) = takeOrder(exData, ethAmount, ActionType.SELL); if (success) { wrapper = exData.exchangeAddr; } } // fallback to desired wrapper if 0x failed if (!success) { swapedTokens = saverSwap(exData, ActionType.SELL); wrapper = exData.wrapper; } require(getBalance(exData.destAddr) >= wmul(exData.minPrice, exData.srcAmount), "Final amount isn't correct"); // if anything is left in weth, pull it to user as eth if (getBalance(WETH_ADDRESS) > 0) { TokenInterface(WETH_ADDRESS).withdraw( TokenInterface(WETH_ADDRESS).balanceOf(address(this)) ); } return (wrapper, swapedTokens); } /// @notice Internal method that preforms a buy on 0x/on-chain /// @dev Usefull for other DFS contract to integrate for exchanging /// @param exData Exchange data struct /// @return (address, uint) Address of the wrapper used and srcAmount function _buy(ExchangeData memory exData) internal returns (address, uint) { address wrapper; uint swapedTokens; bool success; require(exData.destAmount != 0, "Dest amount must be specified"); // if selling eth, convert to weth if (exData.srcAddr == KYBER_ETH_ADDRESS) { exData.srcAddr = ethToWethAddr(exData.srcAddr); TokenInterface(WETH_ADDRESS).deposit.value(exData.srcAmount)(); } if (exData.price0x > 0) { approve0xProxy(exData.srcAddr, exData.srcAmount); uint ethAmount = getProtocolFee(exData.srcAddr, exData.srcAmount); (success, swapedTokens,) = takeOrder(exData, ethAmount, ActionType.BUY); if (success) { wrapper = exData.exchangeAddr; } } // fallback to desired wrapper if 0x failed if (!success) { swapedTokens = saverSwap(exData, ActionType.BUY); wrapper = exData.wrapper; } require(getBalance(exData.destAddr) >= exData.destAmount, "Final amount isn't correct"); // if anything is left in weth, pull it to user as eth if (getBalance(WETH_ADDRESS) > 0) { TokenInterface(WETH_ADDRESS).withdraw( TokenInterface(WETH_ADDRESS).balanceOf(address(this)) ); } return (wrapper, getBalance(exData.destAddr)); } /// @notice Takes order from 0x and returns bool indicating if it is successful /// @param _exData Exchange data /// @param _ethAmount Ether fee needed for 0x order function takeOrder( ExchangeData memory _exData, uint256 _ethAmount, ActionType _type ) private returns (bool success, uint256, uint256) { // write in the exact amount we are selling/buing in an order if (_type == ActionType.SELL) { writeUint256(_exData.callData, 36, _exData.srcAmount); } else { writeUint256(_exData.callData, 36, _exData.destAmount); } if (ZrxAllowlist(ZRX_ALLOWLIST_ADDR).isNonPayableAddr(_exData.exchangeAddr)) { _ethAmount = 0; } uint256 tokensBefore = getBalance(_exData.destAddr); if (ZrxAllowlist(ZRX_ALLOWLIST_ADDR).isZrxAddr(_exData.exchangeAddr)) { (success, ) = _exData.exchangeAddr.call{value: _ethAmount}(_exData.callData); } else { success = false; } uint256 tokensSwaped = 0; uint256 tokensLeft = _exData.srcAmount; if (success) { // check to see if any _src tokens are left over after exchange tokensLeft = getBalance(_exData.srcAddr); // convert weth -> eth if needed if (_exData.destAddr == KYBER_ETH_ADDRESS) { TokenInterface(WETH_ADDRESS).withdraw( TokenInterface(WETH_ADDRESS).balanceOf(address(this)) ); } // get the current balance of the swaped tokens tokensSwaped = getBalance(_exData.destAddr) - tokensBefore; } return (success, tokensSwaped, tokensLeft); } /// @notice Calls wraper contract for exchage to preform an on-chain swap /// @param _exData Exchange data struct /// @param _type Type of action SELL|BUY /// @return swapedTokens For Sell that the destAmount, for Buy thats the srcAmount function saverSwap(ExchangeData memory _exData, ActionType _type) internal returns (uint swapedTokens) { require(SaverExchangeRegistry(SAVER_EXCHANGE_REGISTRY).isWrapper(_exData.wrapper), "Wrapper is not valid"); uint ethValue = 0; ERC20(_exData.srcAddr).safeTransfer(_exData.wrapper, _exData.srcAmount); if (_type == ActionType.SELL) { swapedTokens = ExchangeInterfaceV2(_exData.wrapper). sell{value: ethValue}(_exData.srcAddr, _exData.destAddr, _exData.srcAmount); } else { swapedTokens = ExchangeInterfaceV2(_exData.wrapper). buy{value: ethValue}(_exData.srcAddr, _exData.destAddr, _exData.destAmount); } } function writeUint256(bytes memory _b, uint256 _index, uint _input) internal pure { if (_b.length < _index + 32) { revert("Incorrent lengt while writting bytes32"); } bytes32 input = bytes32(_input); _index += 32; // Read the bytes32 from array memory assembly { mstore(add(_b, _index), input) } } /// @notice Converts Kybers Eth address -> Weth /// @param _src Input address function ethToWethAddr(address _src) internal pure returns (address) { return _src == KYBER_ETH_ADDRESS ? WETH_ADDRESS : _src; } /// @notice Calculates protocol fee /// @param _srcAddr selling token address (if eth should be WETH) /// @param _srcAmount amount we are selling function getProtocolFee(address _srcAddr, uint256 _srcAmount) internal view returns(uint256) { // if we are not selling ETH msg value is always the protocol fee if (_srcAddr != WETH_ADDRESS) return address(this).balance; // if msg value is larger than srcAmount, that means that msg value is protocol fee + srcAmount, so we subsctract srcAmount from msg value // we have an edge case here when protocol fee is higher than selling amount if (address(this).balance > _srcAmount) return address(this).balance - _srcAmount; // if msg value is lower than src amount, that means that srcAmount isn't included in msg value, so we return msg value return address(this).balance; } function packExchangeData(ExchangeData memory _exData) public pure returns(bytes memory) { // splitting in two different bytes and encoding all because of stack too deep in decoding part bytes memory part1 = abi.encode( _exData.srcAddr, _exData.destAddr, _exData.srcAmount, _exData.destAmount ); bytes memory part2 = abi.encode( _exData.minPrice, _exData.wrapper, _exData.exchangeAddr, _exData.callData, _exData.price0x ); return abi.encode(part1, part2); } function unpackExchangeData(bytes memory _data) public pure returns(ExchangeData memory _exData) { ( bytes memory part1, bytes memory part2 ) = abi.decode(_data, (bytes,bytes)); ( _exData.srcAddr, _exData.destAddr, _exData.srcAmount, _exData.destAmount ) = abi.decode(part1, (address,address,uint256,uint256)); ( _exData.minPrice, _exData.wrapper, _exData.exchangeAddr, _exData.callData, _exData.price0x ) = abi.decode(part2, (uint256,address,address,bytes,uint256)); } // solhint-disable-next-line no-empty-blocks receive() external virtual payable {} } contract KyberWrapper is DSMath, ExchangeInterfaceV2, AdminAuth { address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant KYBER_INTERFACE = 0x9AAb3f75489902f3a48495025729a0AF77d4b11e; address payable public constant WALLET_ID = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; using SafeERC20 for ERC20; /// @notice Sells a _srcAmount of tokens at Kyber /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Destination amount function sell(address _srcAddr, address _destAddr, uint _srcAmount) external override payable returns (uint) { ERC20 srcToken = ERC20(_srcAddr); ERC20 destToken = ERC20(_destAddr); KyberNetworkProxyInterface kyberNetworkProxy = KyberNetworkProxyInterface(KYBER_INTERFACE); if (_srcAddr != KYBER_ETH_ADDRESS) { srcToken.safeApprove(address(kyberNetworkProxy), _srcAmount); } uint destAmount = kyberNetworkProxy.trade{value: msg.value}( srcToken, _srcAmount, destToken, msg.sender, uint(-1), 0, WALLET_ID ); return destAmount; } /// @notice Buys a _destAmount of tokens at Kyber /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint srcAmount function buy(address _srcAddr, address _destAddr, uint _destAmount) external override payable returns(uint) { ERC20 srcToken = ERC20(_srcAddr); ERC20 destToken = ERC20(_destAddr); uint srcAmount = 0; if (_srcAddr != KYBER_ETH_ADDRESS) { srcAmount = srcToken.balanceOf(address(this)); } else { srcAmount = msg.value; } KyberNetworkProxyInterface kyberNetworkProxy = KyberNetworkProxyInterface(KYBER_INTERFACE); if (_srcAddr != KYBER_ETH_ADDRESS) { srcToken.safeApprove(address(kyberNetworkProxy), srcAmount); } uint destAmount = kyberNetworkProxy.trade{value: msg.value}( srcToken, srcAmount, destToken, msg.sender, _destAmount, 0, WALLET_ID ); require(destAmount == _destAmount, "Wrong dest amount"); uint srcAmountAfter = 0; if (_srcAddr != KYBER_ETH_ADDRESS) { srcAmountAfter = srcToken.balanceOf(address(this)); } else { srcAmountAfter = address(this).balance; } // Send the leftover from the source token back sendLeftOver(_srcAddr); return (srcAmount - srcAmountAfter); } /// @notice Return a rate for which we can sell an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return rate Rate function getSellRate(address _srcAddr, address _destAddr, uint _srcAmount) public override view returns (uint rate) { (rate, ) = KyberNetworkProxyInterface(KYBER_INTERFACE) .getExpectedRate(ERC20(_srcAddr), ERC20(_destAddr), _srcAmount); // multiply with decimal difference in src token rate = rate * (10**(18 - getDecimals(_srcAddr))); // divide with decimal difference in dest token rate = rate / (10**(18 - getDecimals(_destAddr))); } /// @notice Return a rate for which we can buy an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return rate Rate function getBuyRate(address _srcAddr, address _destAddr, uint _destAmount) public override view returns (uint rate) { uint256 srcRate = getSellRate(_destAddr, _srcAddr, _destAmount); uint256 srcAmount = wmul(srcRate, _destAmount); rate = getSellRate(_srcAddr, _destAddr, srcAmount); // increase rate by 3% too account for inaccuracy between sell/buy conversion rate = rate + (rate / 30); } /// @notice Send any leftover tokens, we use to clear out srcTokens after buy /// @param _srcAddr Source token address function sendLeftOver(address _srcAddr) internal { msg.sender.transfer(address(this).balance); if (_srcAddr != KYBER_ETH_ADDRESS) { ERC20(_srcAddr).safeTransfer(msg.sender, ERC20(_srcAddr).balanceOf(address(this))); } } receive() payable external {} function getDecimals(address _token) internal view returns (uint256) { if (_token == KYBER_ETH_ADDRESS) return 18; return ERC20(_token).decimals(); } } contract OasisTradeWrapper is DSMath, ExchangeInterfaceV2, AdminAuth { using SafeERC20 for ERC20; address public constant OTC_ADDRESS = 0x794e6e91555438aFc3ccF1c5076A74F42133d08D; address public constant WETH_ADDRESS = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; /// @notice Sells a _srcAmount of tokens at Oasis /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Destination amount function sell(address _srcAddr, address _destAddr, uint _srcAmount) external override payable returns (uint) { address srcAddr = ethToWethAddr(_srcAddr); address destAddr = ethToWethAddr(_destAddr); ERC20(srcAddr).safeApprove(OTC_ADDRESS, _srcAmount); uint destAmount = OasisInterface(OTC_ADDRESS).sellAllAmount(srcAddr, _srcAmount, destAddr, 0); // convert weth -> eth and send back if (destAddr == WETH_ADDRESS) { TokenInterface(WETH_ADDRESS).withdraw(destAmount); msg.sender.transfer(destAmount); } else { ERC20(destAddr).safeTransfer(msg.sender, destAmount); } return destAmount; } /// @notice Buys a _destAmount of tokens at Oasis /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint srcAmount function buy(address _srcAddr, address _destAddr, uint _destAmount) external override payable returns(uint) { address srcAddr = ethToWethAddr(_srcAddr); address destAddr = ethToWethAddr(_destAddr); ERC20(srcAddr).safeApprove(OTC_ADDRESS, uint(-1)); uint srcAmount = OasisInterface(OTC_ADDRESS).buyAllAmount(destAddr, _destAmount, srcAddr, uint(-1)); // convert weth -> eth and send back if (destAddr == WETH_ADDRESS) { TokenInterface(WETH_ADDRESS).withdraw(_destAmount); msg.sender.transfer(_destAmount); } else { ERC20(destAddr).safeTransfer(msg.sender, _destAmount); } // Send the leftover from the source token back sendLeftOver(srcAddr); return srcAmount; } /// @notice Return a rate for which we can sell an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Rate function getSellRate(address _srcAddr, address _destAddr, uint _srcAmount) public override view returns (uint) { address srcAddr = ethToWethAddr(_srcAddr); address destAddr = ethToWethAddr(_destAddr); return wdiv(OasisInterface(OTC_ADDRESS).getBuyAmount(destAddr, srcAddr, _srcAmount), _srcAmount); } /// @notice Return a rate for which we can buy an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint Rate function getBuyRate(address _srcAddr, address _destAddr, uint _destAmount) public override view returns (uint) { address srcAddr = ethToWethAddr(_srcAddr); address destAddr = ethToWethAddr(_destAddr); return wdiv(1 ether, wdiv(OasisInterface(OTC_ADDRESS).getPayAmount(srcAddr, destAddr, _destAmount), _destAmount)); } /// @notice Send any leftover tokens, we use to clear out srcTokens after buy /// @param _srcAddr Source token address function sendLeftOver(address _srcAddr) internal { msg.sender.transfer(address(this).balance); if (_srcAddr != KYBER_ETH_ADDRESS) { ERC20(_srcAddr).safeTransfer(msg.sender, ERC20(_srcAddr).balanceOf(address(this))); } } /// @notice Converts Kybers Eth address -> Weth /// @param _src Input address function ethToWethAddr(address _src) internal pure returns (address) { return _src == KYBER_ETH_ADDRESS ? WETH_ADDRESS : _src; } receive() payable external {} } contract UniswapV2Wrapper is DSMath, ExchangeInterfaceV2, AdminAuth { address public constant WETH_ADDRESS = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; UniswapRouterInterface public constant router = UniswapRouterInterface(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D); using SafeERC20 for ERC20; /// @notice Sells a _srcAmount of tokens at UniswapV2 /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Destination amount function sell(address _srcAddr, address _destAddr, uint _srcAmount) external payable override returns (uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); uint[] memory amounts; address[] memory path = new address[](2); path[0] = _srcAddr; path[1] = _destAddr; ERC20(_srcAddr).safeApprove(address(router), _srcAmount); // if we are buying ether if (_destAddr == WETH_ADDRESS) { amounts = router.swapExactTokensForETH(_srcAmount, 1, path, msg.sender, block.timestamp + 1); } // if we are selling token to token else { amounts = router.swapExactTokensForTokens(_srcAmount, 1, path, msg.sender, block.timestamp + 1); } return amounts[amounts.length - 1]; } /// @notice Buys a _destAmount of tokens at UniswapV2 /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint srcAmount function buy(address _srcAddr, address _destAddr, uint _destAmount) external override payable returns(uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); uint[] memory amounts; address[] memory path = new address[](2); path[0] = _srcAddr; path[1] = _destAddr; ERC20(_srcAddr).safeApprove(address(router), uint(-1)); // if we are buying ether if (_destAddr == WETH_ADDRESS) { amounts = router.swapTokensForExactETH(_destAmount, uint(-1), path, msg.sender, block.timestamp + 1); } // if we are buying token to token else { amounts = router.swapTokensForExactTokens(_destAmount, uint(-1), path, msg.sender, block.timestamp + 1); } // Send the leftover from the source token back sendLeftOver(_srcAddr); return amounts[0]; } /// @notice Return a rate for which we can sell an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Rate function getSellRate(address _srcAddr, address _destAddr, uint _srcAmount) public override view returns (uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); address[] memory path = new address[](2); path[0] = _srcAddr; path[1] = _destAddr; uint[] memory amounts = router.getAmountsOut(_srcAmount, path); return wdiv(amounts[amounts.length - 1], _srcAmount); } /// @notice Return a rate for which we can buy an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint Rate function getBuyRate(address _srcAddr, address _destAddr, uint _destAmount) public override view returns (uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); address[] memory path = new address[](2); path[0] = _srcAddr; path[1] = _destAddr; uint[] memory amounts = router.getAmountsIn(_destAmount, path); return wdiv(_destAmount, amounts[0]); } /// @notice Send any leftover tokens, we use to clear out srcTokens after buy /// @param _srcAddr Source token address function sendLeftOver(address _srcAddr) internal { msg.sender.transfer(address(this).balance); if (_srcAddr != KYBER_ETH_ADDRESS) { ERC20(_srcAddr).safeTransfer(msg.sender, ERC20(_srcAddr).balanceOf(address(this))); } } /// @notice Converts Kybers Eth address -> Weth /// @param _src Input address function ethToWethAddr(address _src) internal pure returns (address) { return _src == KYBER_ETH_ADDRESS ? WETH_ADDRESS : _src; } function getDecimals(address _token) internal view returns (uint256) { if (_token == KYBER_ETH_ADDRESS) return 18; return ERC20(_token).decimals(); } receive() payable external {} } contract UniswapWrapper is DSMath, ExchangeInterfaceV2, AdminAuth { address public constant WETH_ADDRESS = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant UNISWAP_FACTORY = 0xc0a47dFe034B400B47bDaD5FecDa2621de6c4d95; using SafeERC20 for ERC20; /// @notice Sells a _srcAmount of tokens at Uniswap /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Destination amount function sell(address _srcAddr, address _destAddr, uint _srcAmount) external payable override returns (uint) { address uniswapExchangeAddr; uint destAmount; _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); // if we are buying ether if (_destAddr == WETH_ADDRESS) { uniswapExchangeAddr = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr); ERC20(_srcAddr).safeApprove(uniswapExchangeAddr, _srcAmount); destAmount = UniswapExchangeInterface(uniswapExchangeAddr). tokenToEthTransferInput(_srcAmount, 1, block.timestamp + 1, msg.sender); } // if we are selling token to token else { uniswapExchangeAddr = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr); ERC20(_srcAddr).safeApprove(uniswapExchangeAddr, _srcAmount); destAmount = UniswapExchangeInterface(uniswapExchangeAddr). tokenToTokenTransferInput(_srcAmount, 1, 1, block.timestamp + 1, msg.sender, _destAddr); } return destAmount; } /// @notice Buys a _destAmount of tokens at Uniswap /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint srcAmount function buy(address _srcAddr, address _destAddr, uint _destAmount) external override payable returns(uint) { address uniswapExchangeAddr; uint srcAmount; _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); // if we are buying ether if (_destAddr == WETH_ADDRESS) { uniswapExchangeAddr = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr); ERC20(_srcAddr).safeApprove(uniswapExchangeAddr, uint(-1)); srcAmount = UniswapExchangeInterface(uniswapExchangeAddr). tokenToEthTransferOutput(_destAmount, uint(-1), block.timestamp + 1, msg.sender); } // if we are buying token to token else { uniswapExchangeAddr = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr); ERC20(_srcAddr).safeApprove(uniswapExchangeAddr, uint(-1)); srcAmount = UniswapExchangeInterface(uniswapExchangeAddr). tokenToTokenTransferOutput(_destAmount, uint(-1), uint(-1), block.timestamp + 1, msg.sender, _destAddr); } // Send the leftover from the source token back sendLeftOver(_srcAddr); return srcAmount; } /// @notice Return a rate for which we can sell an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Rate function getSellRate(address _srcAddr, address _destAddr, uint _srcAmount) public override view returns (uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); if(_srcAddr == WETH_ADDRESS) { address uniswapTokenAddress = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_destAddr); return wdiv(UniswapExchangeInterface(uniswapTokenAddress).getEthToTokenInputPrice(_srcAmount), _srcAmount); } else if (_destAddr == WETH_ADDRESS) { address uniswapTokenAddress = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr); return wdiv(UniswapExchangeInterface(uniswapTokenAddress).getTokenToEthInputPrice(_srcAmount), _srcAmount); } else { uint ethBought = UniswapExchangeInterface(UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr)).getTokenToEthInputPrice(_srcAmount); return wdiv(UniswapExchangeInterface(UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_destAddr)).getEthToTokenInputPrice(ethBought), _srcAmount); } } /// @notice Return a rate for which we can buy an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint Rate function getBuyRate(address _srcAddr, address _destAddr, uint _destAmount) public override view returns (uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); if(_srcAddr == WETH_ADDRESS) { address uniswapTokenAddress = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_destAddr); return wdiv(1 ether, wdiv(UniswapExchangeInterface(uniswapTokenAddress).getEthToTokenOutputPrice(_destAmount), _destAmount)); } else if (_destAddr == WETH_ADDRESS) { address uniswapTokenAddress = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr); return wdiv(1 ether, wdiv(UniswapExchangeInterface(uniswapTokenAddress).getTokenToEthOutputPrice(_destAmount), _destAmount)); } else { uint ethNeeded = UniswapExchangeInterface(UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_destAddr)).getTokenToEthOutputPrice(_destAmount); return wdiv(1 ether, wdiv(UniswapExchangeInterface(UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr)).getEthToTokenOutputPrice(ethNeeded), _destAmount)); } } /// @notice Send any leftover tokens, we use to clear out srcTokens after buy /// @param _srcAddr Source token address function sendLeftOver(address _srcAddr) internal { msg.sender.transfer(address(this).balance); if (_srcAddr != KYBER_ETH_ADDRESS) { ERC20(_srcAddr).safeTransfer(msg.sender, ERC20(_srcAddr).balanceOf(address(this))); } } /// @notice Converts Kybers Eth address -> Weth /// @param _src Input address function ethToWethAddr(address _src) internal pure returns (address) { return _src == KYBER_ETH_ADDRESS ? WETH_ADDRESS : _src; } receive() payable external {} } contract DFSExchangeCore is DFSExchangeHelper, DSMath, DFSExchangeData { string public constant ERR_SLIPPAGE_HIT = "Slippage hit"; string public constant ERR_DEST_AMOUNT_MISSING = "Dest amount missing"; string public constant ERR_WRAPPER_INVALID = "Wrapper invalid"; string public constant ERR_OFFCHAIN_DATA_INVALID = "Offchain data invalid"; /// @notice Internal method that preforms a sell on 0x/on-chain /// @dev Usefull for other DFS contract to integrate for exchanging /// @param exData Exchange data struct /// @return (address, uint) Address of the wrapper used and destAmount function _sell(ExchangeData memory exData) internal returns (address, uint) { address wrapper; uint swapedTokens; bool success; // if selling eth, convert to weth if (exData.srcAddr == KYBER_ETH_ADDRESS) { exData.srcAddr = ethToWethAddr(exData.srcAddr); TokenInterface(WETH_ADDRESS).deposit.value(exData.srcAmount)(); } exData.srcAmount -= getFee(exData.srcAmount, exData.user, exData.srcAddr, exData.dfsFeeDivider); // Try 0x first and then fallback on specific wrapper if (exData.offchainData.price > 0) { (success, swapedTokens) = takeOrder(exData, ActionType.SELL); if (success) { wrapper = exData.offchainData.exchangeAddr; } } // fallback to desired wrapper if 0x failed if (!success) { swapedTokens = saverSwap(exData, ActionType.SELL); wrapper = exData.wrapper; } require(getBalance(exData.destAddr) >= wmul(exData.minPrice, exData.srcAmount), ERR_SLIPPAGE_HIT); // if anything is left in weth, pull it to user as eth if (getBalance(WETH_ADDRESS) > 0) { TokenInterface(WETH_ADDRESS).withdraw( TokenInterface(WETH_ADDRESS).balanceOf(address(this)) ); } return (wrapper, swapedTokens); } /// @notice Internal method that preforms a buy on 0x/on-chain /// @dev Usefull for other DFS contract to integrate for exchanging /// @param exData Exchange data struct /// @return (address, uint) Address of the wrapper used and srcAmount function _buy(ExchangeData memory exData) internal returns (address, uint) { address wrapper; uint swapedTokens; bool success; require(exData.destAmount != 0, ERR_DEST_AMOUNT_MISSING); // if selling eth, convert to weth if (exData.srcAddr == KYBER_ETH_ADDRESS) { exData.srcAddr = ethToWethAddr(exData.srcAddr); TokenInterface(WETH_ADDRESS).deposit.value(exData.srcAmount)(); } exData.srcAmount -= getFee(exData.srcAmount, exData.user, exData.srcAddr, exData.dfsFeeDivider); if (exData.offchainData.price > 0) { (success, swapedTokens) = takeOrder(exData, ActionType.BUY); if (success) { wrapper = exData.offchainData.exchangeAddr; } } // fallback to desired wrapper if 0x failed if (!success) { swapedTokens = saverSwap(exData, ActionType.BUY); wrapper = exData.wrapper; } require(getBalance(exData.destAddr) >= exData.destAmount, ERR_SLIPPAGE_HIT); // if anything is left in weth, pull it to user as eth if (getBalance(WETH_ADDRESS) > 0) { TokenInterface(WETH_ADDRESS).withdraw( TokenInterface(WETH_ADDRESS).balanceOf(address(this)) ); } return (wrapper, getBalance(exData.destAddr)); } /// @notice Takes order from 0x and returns bool indicating if it is successful /// @param _exData Exchange data function takeOrder( ExchangeData memory _exData, ActionType _type ) private returns (bool success, uint256) { if (_exData.srcAddr != KYBER_ETH_ADDRESS) { ERC20(_exData.srcAddr).safeApprove(_exData.offchainData.allowanceTarget, _exData.srcAmount); } // write in the exact amount we are selling/buing in an order if (_type == ActionType.SELL) { writeUint256(_exData.offchainData.callData, 36, _exData.srcAmount); } else { writeUint256(_exData.offchainData.callData, 36, _exData.destAmount); } uint256 tokensBefore = getBalance(_exData.destAddr); if (ZrxAllowlist(ZRX_ALLOWLIST_ADDR).isZrxAddr(_exData.offchainData.exchangeAddr)) { (success, ) = _exData.offchainData.exchangeAddr.call{value: _exData.offchainData.protocolFee}(_exData.offchainData.callData); } else { success = false; } uint256 tokensSwaped = 0; if (success) { // convert weth -> eth if needed if (_exData.destAddr == KYBER_ETH_ADDRESS) { TokenInterface(WETH_ADDRESS).withdraw( TokenInterface(WETH_ADDRESS).balanceOf(address(this)) ); } // get the current balance of the swaped tokens tokensSwaped = getBalance(_exData.destAddr) - tokensBefore; } return (success, tokensSwaped); } /// @notice Calls wraper contract for exchage to preform an on-chain swap /// @param _exData Exchange data struct /// @param _type Type of action SELL|BUY /// @return swapedTokens For Sell that the destAmount, for Buy thats the srcAmount function saverSwap(ExchangeData memory _exData, ActionType _type) internal returns (uint swapedTokens) { require(SaverExchangeRegistry(SAVER_EXCHANGE_REGISTRY).isWrapper(_exData.wrapper), ERR_WRAPPER_INVALID); ERC20(_exData.srcAddr).safeTransfer(_exData.wrapper, _exData.srcAmount); if (_type == ActionType.SELL) { swapedTokens = ExchangeInterfaceV3(_exData.wrapper). sell(_exData.srcAddr, _exData.destAddr, _exData.srcAmount, _exData.wrapperData); } else { swapedTokens = ExchangeInterfaceV3(_exData.wrapper). buy(_exData.srcAddr, _exData.destAddr, _exData.destAmount, _exData.wrapperData); } } function writeUint256(bytes memory _b, uint256 _index, uint _input) internal pure { if (_b.length < _index + 32) { revert(ERR_OFFCHAIN_DATA_INVALID); } bytes32 input = bytes32(_input); _index += 32; // Read the bytes32 from array memory assembly { mstore(add(_b, _index), input) } } /// @notice Converts Kybers Eth address -> Weth /// @param _src Input address function ethToWethAddr(address _src) internal pure returns (address) { return _src == KYBER_ETH_ADDRESS ? WETH_ADDRESS : _src; } // solhint-disable-next-line no-empty-blocks receive() external virtual payable {} } contract KyberWrapperV3 is DSMath, ExchangeInterfaceV3, AdminAuth { address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant KYBER_INTERFACE = 0x9AAb3f75489902f3a48495025729a0AF77d4b11e; address payable public constant WALLET_ID = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; using SafeERC20 for ERC20; /// @notice Sells a _srcAmount of tokens at Kyber /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Destination amount function sell(address _srcAddr, address _destAddr, uint _srcAmount, bytes memory _additionalData) external override payable returns (uint) { ERC20 srcToken = ERC20(_srcAddr); ERC20 destToken = ERC20(_destAddr); KyberNetworkProxyInterface kyberNetworkProxy = KyberNetworkProxyInterface(KYBER_INTERFACE); if (_srcAddr != KYBER_ETH_ADDRESS) { srcToken.safeApprove(address(kyberNetworkProxy), _srcAmount); } uint destAmount = kyberNetworkProxy.trade{value: msg.value}( srcToken, _srcAmount, destToken, msg.sender, uint(-1), 0, WALLET_ID ); return destAmount; } /// @notice Buys a _destAmount of tokens at Kyber /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint srcAmount function buy(address _srcAddr, address _destAddr, uint _destAmount, bytes memory _additionalData) external override payable returns(uint) { ERC20 srcToken = ERC20(_srcAddr); ERC20 destToken = ERC20(_destAddr); uint srcAmount = 0; if (_srcAddr != KYBER_ETH_ADDRESS) { srcAmount = srcToken.balanceOf(address(this)); } else { srcAmount = msg.value; } KyberNetworkProxyInterface kyberNetworkProxy = KyberNetworkProxyInterface(KYBER_INTERFACE); if (_srcAddr != KYBER_ETH_ADDRESS) { srcToken.safeApprove(address(kyberNetworkProxy), srcAmount); } uint destAmount = kyberNetworkProxy.trade{value: msg.value}( srcToken, srcAmount, destToken, msg.sender, _destAmount, 0, WALLET_ID ); require(destAmount == _destAmount, "Wrong dest amount"); uint srcAmountAfter = 0; if (_srcAddr != KYBER_ETH_ADDRESS) { srcAmountAfter = srcToken.balanceOf(address(this)); } else { srcAmountAfter = address(this).balance; } // Send the leftover from the source token back sendLeftOver(_srcAddr); return (srcAmount - srcAmountAfter); } /// @notice Return a rate for which we can sell an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return rate Rate function getSellRate(address _srcAddr, address _destAddr, uint _srcAmount, bytes memory _additionalData) public override view returns (uint rate) { (rate, ) = KyberNetworkProxyInterface(KYBER_INTERFACE) .getExpectedRate(ERC20(_srcAddr), ERC20(_destAddr), _srcAmount); // multiply with decimal difference in src token rate = rate * (10**(18 - getDecimals(_srcAddr))); // divide with decimal difference in dest token rate = rate / (10**(18 - getDecimals(_destAddr))); } /// @notice Return a rate for which we can buy an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return rate Rate function getBuyRate(address _srcAddr, address _destAddr, uint _destAmount, bytes memory _additionalData) public override view returns (uint rate) { uint256 srcRate = getSellRate(_destAddr, _srcAddr, _destAmount, _additionalData); uint256 srcAmount = wmul(srcRate, _destAmount); rate = getSellRate(_srcAddr, _destAddr, srcAmount, _additionalData); // increase rate by 3% too account for inaccuracy between sell/buy conversion rate = rate + (rate / 30); } /// @notice Send any leftover tokens, we use to clear out srcTokens after buy /// @param _srcAddr Source token address function sendLeftOver(address _srcAddr) internal { msg.sender.transfer(address(this).balance); if (_srcAddr != KYBER_ETH_ADDRESS) { ERC20(_srcAddr).safeTransfer(msg.sender, ERC20(_srcAddr).balanceOf(address(this))); } } receive() payable external {} function getDecimals(address _token) internal view returns (uint256) { if (_token == KYBER_ETH_ADDRESS) return 18; return ERC20(_token).decimals(); } } contract OasisTradeWrapperV3 is DSMath, ExchangeInterfaceV3, AdminAuth { using SafeERC20 for ERC20; address public constant OTC_ADDRESS = 0x794e6e91555438aFc3ccF1c5076A74F42133d08D; address public constant WETH_ADDRESS = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; /// @notice Sells a _srcAmount of tokens at Oasis /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Destination amount function sell(address _srcAddr, address _destAddr, uint _srcAmount, bytes memory _additionalData) external override payable returns (uint) { address srcAddr = ethToWethAddr(_srcAddr); address destAddr = ethToWethAddr(_destAddr); ERC20(srcAddr).safeApprove(OTC_ADDRESS, _srcAmount); uint destAmount = OasisInterface(OTC_ADDRESS).sellAllAmount(srcAddr, _srcAmount, destAddr, 0); // convert weth -> eth and send back if (destAddr == WETH_ADDRESS) { TokenInterface(WETH_ADDRESS).withdraw(destAmount); msg.sender.transfer(destAmount); } else { ERC20(destAddr).safeTransfer(msg.sender, destAmount); } return destAmount; } /// @notice Buys a _destAmount of tokens at Oasis /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint srcAmount function buy(address _srcAddr, address _destAddr, uint _destAmount, bytes memory _additionalData) external override payable returns(uint) { address srcAddr = ethToWethAddr(_srcAddr); address destAddr = ethToWethAddr(_destAddr); ERC20(srcAddr).safeApprove(OTC_ADDRESS, uint(-1)); uint srcAmount = OasisInterface(OTC_ADDRESS).buyAllAmount(destAddr, _destAmount, srcAddr, uint(-1)); // convert weth -> eth and send back if (destAddr == WETH_ADDRESS) { TokenInterface(WETH_ADDRESS).withdraw(_destAmount); msg.sender.transfer(_destAmount); } else { ERC20(destAddr).safeTransfer(msg.sender, _destAmount); } // Send the leftover from the source token back sendLeftOver(srcAddr); return srcAmount; } /// @notice Return a rate for which we can sell an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Rate function getSellRate(address _srcAddr, address _destAddr, uint _srcAmount, bytes memory _additionalData) public override view returns (uint) { address srcAddr = ethToWethAddr(_srcAddr); address destAddr = ethToWethAddr(_destAddr); return wdiv(OasisInterface(OTC_ADDRESS).getBuyAmount(destAddr, srcAddr, _srcAmount), _srcAmount); } /// @notice Return a rate for which we can buy an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint Rate function getBuyRate(address _srcAddr, address _destAddr, uint _destAmount, bytes memory _additionalData) public override view returns (uint) { address srcAddr = ethToWethAddr(_srcAddr); address destAddr = ethToWethAddr(_destAddr); return wdiv(1 ether, wdiv(OasisInterface(OTC_ADDRESS).getPayAmount(srcAddr, destAddr, _destAmount), _destAmount)); } /// @notice Send any leftover tokens, we use to clear out srcTokens after buy /// @param _srcAddr Source token address function sendLeftOver(address _srcAddr) internal { msg.sender.transfer(address(this).balance); if (_srcAddr != KYBER_ETH_ADDRESS) { ERC20(_srcAddr).safeTransfer(msg.sender, ERC20(_srcAddr).balanceOf(address(this))); } } /// @notice Converts Kybers Eth address -> Weth /// @param _src Input address function ethToWethAddr(address _src) internal pure returns (address) { return _src == KYBER_ETH_ADDRESS ? WETH_ADDRESS : _src; } receive() payable external {} } contract UniswapWrapperV3 is DSMath, ExchangeInterfaceV3, AdminAuth { address public constant WETH_ADDRESS = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; UniswapRouterInterface public constant router = UniswapRouterInterface(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D); using SafeERC20 for ERC20; /// @notice Sells a _srcAmount of tokens at UniswapV2 /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Destination amount function sell(address _srcAddr, address _destAddr, uint _srcAmount, bytes memory _additionalData) external payable override returns (uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); uint[] memory amounts; address[] memory path = abi.decode(_additionalData, (address[])); ERC20(_srcAddr).safeApprove(address(router), _srcAmount); // if we are buying ether if (_destAddr == WETH_ADDRESS) { amounts = router.swapExactTokensForETH(_srcAmount, 1, path, msg.sender, block.timestamp + 1); } // if we are selling token to token else { amounts = router.swapExactTokensForTokens(_srcAmount, 1, path, msg.sender, block.timestamp + 1); } return amounts[amounts.length - 1]; } /// @notice Buys a _destAmount of tokens at UniswapV2 /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint srcAmount function buy(address _srcAddr, address _destAddr, uint _destAmount, bytes memory _additionalData) external override payable returns(uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); uint[] memory amounts; address[] memory path = abi.decode(_additionalData, (address[])); ERC20(_srcAddr).safeApprove(address(router), uint(-1)); // if we are buying ether if (_destAddr == WETH_ADDRESS) { amounts = router.swapTokensForExactETH(_destAmount, uint(-1), path, msg.sender, block.timestamp + 1); } // if we are buying token to token else { amounts = router.swapTokensForExactTokens(_destAmount, uint(-1), path, msg.sender, block.timestamp + 1); } // Send the leftover from the source token back sendLeftOver(_srcAddr); return amounts[0]; } /// @notice Return a rate for which we can sell an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Rate function getSellRate(address _srcAddr, address _destAddr, uint _srcAmount, bytes memory _additionalData) public override view returns (uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); address[] memory path = abi.decode(_additionalData, (address[])); uint[] memory amounts = router.getAmountsOut(_srcAmount, path); return wdiv(amounts[amounts.length - 1], _srcAmount); } /// @notice Return a rate for which we can buy an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint Rate function getBuyRate(address _srcAddr, address _destAddr, uint _destAmount, bytes memory _additionalData) public override view returns (uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); address[] memory path = abi.decode(_additionalData, (address[])); uint[] memory amounts = router.getAmountsIn(_destAmount, path); return wdiv(_destAmount, amounts[0]); } /// @notice Send any leftover tokens, we use to clear out srcTokens after buy /// @param _srcAddr Source token address function sendLeftOver(address _srcAddr) internal { msg.sender.transfer(address(this).balance); if (_srcAddr != KYBER_ETH_ADDRESS) { ERC20(_srcAddr).safeTransfer(msg.sender, ERC20(_srcAddr).balanceOf(address(this))); } } /// @notice Converts Kybers Eth address -> Weth /// @param _src Input address function ethToWethAddr(address _src) internal pure returns (address) { return _src == KYBER_ETH_ADDRESS ? WETH_ADDRESS : _src; } function getDecimals(address _token) internal view returns (uint256) { if (_token == KYBER_ETH_ADDRESS) return 18; return ERC20(_token).decimals(); } receive() payable external {} } contract DyDxFlashLoanTaker is DydxFlashLoanBase, ProxyPermission { address public constant WETH_ADDR = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; /// @notice Takes flash loan for _receiver /// @dev Receiver must send back WETH + 2 wei after executing transaction /// @dev Method is meant to be called from proxy and proxy will give authorization to _receiver /// @param _receiver Address of funds receiver /// @param _ethAmount ETH amount that needs to be pulled from dydx /// @param _encodedData Bytes with packed data function takeLoan(address _receiver, uint256 _ethAmount, bytes memory _encodedData) public { ISoloMargin solo = ISoloMargin(SOLO_MARGIN_ADDRESS); // Get marketId from token address uint256 marketId = _getMarketIdFromTokenAddress(WETH_ADDR); // Calculate repay amount (_amount + (2 wei)) // Approve transfer from uint256 repayAmount = _getRepaymentAmountInternal(_ethAmount); ERC20(WETH_ADDR).approve(SOLO_MARGIN_ADDRESS, repayAmount); Actions.ActionArgs[] memory operations = new Actions.ActionArgs[](3); operations[0] = _getWithdrawAction(marketId, _ethAmount, _receiver); operations[1] = _getCallAction( _encodedData, _receiver ); operations[2] = _getDepositAction(marketId, repayAmount, address(this)); Account.Info[] memory accountInfos = new Account.Info[](1); accountInfos[0] = _getAccountInfo(); givePermission(_receiver); solo.operate(accountInfos, operations); removePermission(_receiver); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "DyDxFlashLoanTaken", abi.encode(_receiver, _ethAmount, _encodedData)); } } abstract contract CTokenInterface is ERC20 { function mint(uint256 mintAmount) external virtual returns (uint256); // function mint() external virtual payable; function accrueInterest() public virtual returns (uint); function redeem(uint256 redeemTokens) external virtual returns (uint256); function redeemUnderlying(uint256 redeemAmount) external virtual returns (uint256); function borrow(uint256 borrowAmount) external virtual returns (uint256); function borrowIndex() public view virtual returns (uint); function borrowBalanceStored(address) public view virtual returns(uint); function repayBorrow(uint256 repayAmount) external virtual returns (uint256); function repayBorrow() external virtual payable; function repayBorrowBehalf(address borrower, uint256 repayAmount) external virtual returns (uint256); function repayBorrowBehalf(address borrower) external virtual payable; function liquidateBorrow(address borrower, uint256 repayAmount, address cTokenCollateral) external virtual returns (uint256); function liquidateBorrow(address borrower, address cTokenCollateral) external virtual payable; function exchangeRateCurrent() external virtual returns (uint256); function supplyRatePerBlock() external virtual returns (uint256); function borrowRatePerBlock() external virtual returns (uint256); function totalReserves() external virtual returns (uint256); function reserveFactorMantissa() external virtual returns (uint256); function borrowBalanceCurrent(address account) external virtual returns (uint256); function totalBorrowsCurrent() external virtual returns (uint256); function getCash() external virtual returns (uint256); function balanceOfUnderlying(address owner) external virtual returns (uint256); function underlying() external virtual returns (address); function getAccountSnapshot(address account) external virtual view returns (uint, uint, uint, uint); } abstract contract ISubscriptionsV2 is StaticV2 { function getOwner(uint _cdpId) external view virtual returns(address); function getSubscribedInfo(uint _cdpId) public view virtual returns(bool, uint128, uint128, uint128, uint128, address, uint coll, uint debt); function getCdpHolder(uint _cdpId) public view virtual returns (bool subscribed, CdpHolder memory); } contract MCDMonitorV2 is DSMath, AdminAuth, GasBurner, StaticV2 { uint public REPAY_GAS_TOKEN = 25; uint public BOOST_GAS_TOKEN = 25; uint public MAX_GAS_PRICE = 500000000000; // 500 gwei uint public REPAY_GAS_COST = 1800000; uint public BOOST_GAS_COST = 1800000; MCDMonitorProxyV2 public monitorProxyContract; ISubscriptionsV2 public subscriptionsContract; address public mcdSaverTakerAddress; address public constant BOT_REGISTRY_ADDRESS = 0x637726f8b08a7ABE3aE3aCaB01A80E2d8ddeF77B; Manager public manager = Manager(0x5ef30b9986345249bc32d8928B7ee64DE9435E39); Vat public vat = Vat(0x35D1b3F3D7966A1DFe207aa4514C12a259A0492B); Spotter public spotter = Spotter(0x65C79fcB50Ca1594B025960e539eD7A9a6D434A3); DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); modifier onlyApproved() { require(BotRegistry(BOT_REGISTRY_ADDRESS).botList(msg.sender), "Not auth bot"); _; } constructor(address _monitorProxy, address _subscriptions, address _mcdSaverTakerAddress) public { monitorProxyContract = MCDMonitorProxyV2(_monitorProxy); subscriptionsContract = ISubscriptionsV2(_subscriptions); mcdSaverTakerAddress = _mcdSaverTakerAddress; } /// @notice Bots call this method to repay for user when conditions are met /// @dev If the contract ownes gas token it will try and use it for gas price reduction function repayFor( SaverExchangeCore.ExchangeData memory _exchangeData, uint _cdpId, uint _nextPrice, address _joinAddr ) public payable onlyApproved burnGas(REPAY_GAS_TOKEN) { (bool isAllowed, uint ratioBefore) = canCall(Method.Repay, _cdpId, _nextPrice); require(isAllowed); uint gasCost = calcGasCost(REPAY_GAS_COST); address owner = subscriptionsContract.getOwner(_cdpId); monitorProxyContract.callExecute{value: msg.value}( owner, mcdSaverTakerAddress, abi.encodeWithSignature( "repayWithLoan((address,address,uint256,uint256,uint256,address,address,bytes,uint256),uint256,uint256,address)", _exchangeData, _cdpId, gasCost, _joinAddr)); (bool isGoodRatio, uint ratioAfter) = ratioGoodAfter(Method.Repay, _cdpId, _nextPrice); require(isGoodRatio); returnEth(); logger.Log(address(this), owner, "AutomaticMCDRepay", abi.encode(ratioBefore, ratioAfter)); } /// @notice Bots call this method to boost for user when conditions are met /// @dev If the contract ownes gas token it will try and use it for gas price reduction function boostFor( SaverExchangeCore.ExchangeData memory _exchangeData, uint _cdpId, uint _nextPrice, address _joinAddr ) public payable onlyApproved burnGas(BOOST_GAS_TOKEN) { (bool isAllowed, uint ratioBefore) = canCall(Method.Boost, _cdpId, _nextPrice); require(isAllowed); uint gasCost = calcGasCost(BOOST_GAS_COST); address owner = subscriptionsContract.getOwner(_cdpId); monitorProxyContract.callExecute{value: msg.value}( owner, mcdSaverTakerAddress, abi.encodeWithSignature( "boostWithLoan((address,address,uint256,uint256,uint256,address,address,bytes,uint256),uint256,uint256,address)", _exchangeData, _cdpId, gasCost, _joinAddr)); (bool isGoodRatio, uint ratioAfter) = ratioGoodAfter(Method.Boost, _cdpId, _nextPrice); require(isGoodRatio); returnEth(); logger.Log(address(this), owner, "AutomaticMCDBoost", abi.encode(ratioBefore, ratioAfter)); } /******************* INTERNAL METHODS ********************************/ function returnEth() internal { // return if some eth left if (address(this).balance > 0) { msg.sender.transfer(address(this).balance); } } /******************* STATIC METHODS ********************************/ /// @notice Returns an address that owns the CDP /// @param _cdpId Id of the CDP function getOwner(uint _cdpId) public view returns(address) { return manager.owns(_cdpId); } /// @notice Gets CDP info (collateral, debt) /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP function getCdpInfo(uint _cdpId, bytes32 _ilk) public view returns (uint, uint) { address urn = manager.urns(_cdpId); (uint collateral, uint debt) = vat.urns(_ilk, urn); (,uint rate,,,) = vat.ilks(_ilk); return (collateral, rmul(debt, rate)); } /// @notice Gets a price of the asset /// @param _ilk Ilk of the CDP function getPrice(bytes32 _ilk) public view returns (uint) { (, uint mat) = spotter.ilks(_ilk); (,,uint spot,,) = vat.ilks(_ilk); return rmul(rmul(spot, spotter.par()), mat); } /// @notice Gets CDP ratio /// @param _cdpId Id of the CDP /// @param _nextPrice Next price for user function getRatio(uint _cdpId, uint _nextPrice) public view returns (uint) { bytes32 ilk = manager.ilks(_cdpId); uint price = (_nextPrice == 0) ? getPrice(ilk) : _nextPrice; (uint collateral, uint debt) = getCdpInfo(_cdpId, ilk); if (debt == 0) return 0; return rdiv(wmul(collateral, price), debt) / (10 ** 18); } /// @notice Checks if Boost/Repay could be triggered for the CDP /// @dev Called by MCDMonitor to enforce the min/max check function canCall(Method _method, uint _cdpId, uint _nextPrice) public view returns(bool, uint) { bool subscribed; CdpHolder memory holder; (subscribed, holder) = subscriptionsContract.getCdpHolder(_cdpId); // check if cdp is subscribed if (!subscribed) return (false, 0); // check if using next price is allowed if (_nextPrice > 0 && !holder.nextPriceEnabled) return (false, 0); // check if boost and boost allowed if (_method == Method.Boost && !holder.boostEnabled) return (false, 0); // check if owner is still owner if (getOwner(_cdpId) != holder.owner) return (false, 0); uint currRatio = getRatio(_cdpId, _nextPrice); if (_method == Method.Repay) { return (currRatio < holder.minRatio, currRatio); } else if (_method == Method.Boost) { return (currRatio > holder.maxRatio, currRatio); } } /// @dev After the Boost/Repay check if the ratio doesn't trigger another call function ratioGoodAfter(Method _method, uint _cdpId, uint _nextPrice) public view returns(bool, uint) { CdpHolder memory holder; (, holder) = subscriptionsContract.getCdpHolder(_cdpId); uint currRatio = getRatio(_cdpId, _nextPrice); if (_method == Method.Repay) { return (currRatio < holder.maxRatio, currRatio); } else if (_method == Method.Boost) { return (currRatio > holder.minRatio, currRatio); } } /// @notice Calculates gas cost (in Eth) of tx /// @dev Gas price is limited to MAX_GAS_PRICE to prevent attack of draining user CDP /// @param _gasAmount Amount of gas used for the tx function calcGasCost(uint _gasAmount) public view returns (uint) { uint gasPrice = tx.gasprice <= MAX_GAS_PRICE ? tx.gasprice : MAX_GAS_PRICE; return mul(gasPrice, _gasAmount); } /******************* OWNER ONLY OPERATIONS ********************************/ /// @notice Allows owner to change gas cost for boost operation, but only up to 3 millions /// @param _gasCost New gas cost for boost method function changeBoostGasCost(uint _gasCost) public onlyOwner { require(_gasCost < 3000000); BOOST_GAS_COST = _gasCost; } /// @notice Allows owner to change gas cost for repay operation, but only up to 3 millions /// @param _gasCost New gas cost for repay method function changeRepayGasCost(uint _gasCost) public onlyOwner { require(_gasCost < 3000000); REPAY_GAS_COST = _gasCost; } /// @notice Allows owner to change max gas price /// @param _maxGasPrice New max gas price function changeMaxGasPrice(uint _maxGasPrice) public onlyOwner { require(_maxGasPrice < 500000000000); MAX_GAS_PRICE = _maxGasPrice; } /// @notice Allows owner to change the amount of gas token burned per function call /// @param _gasAmount Amount of gas token /// @param _isRepay Flag to know for which function we are setting the gas token amount function changeGasTokenAmount(uint _gasAmount, bool _isRepay) public onlyOwner { if (_isRepay) { REPAY_GAS_TOKEN = _gasAmount; } else { BOOST_GAS_TOKEN = _gasAmount; } } } contract MCDCloseFlashLoan is SaverExchangeCore, MCDSaverProxyHelper, FlashLoanReceiverBase, AdminAuth { ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); uint public constant SERVICE_FEE = 400; // 0.25% Fee bytes32 internal constant ETH_ILK = 0x4554482d41000000000000000000000000000000000000000000000000000000; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; address public constant DAI_JOIN_ADDRESS = 0x9759A6Ac90977b93B58547b4A71c78317f391A28; address public constant SPOTTER_ADDRESS = 0x65C79fcB50Ca1594B025960e539eD7A9a6D434A3; address public constant VAT_ADDRESS = 0x35D1b3F3D7966A1DFe207aa4514C12a259A0492B; Manager public constant manager = Manager(0x5ef30b9986345249bc32d8928B7ee64DE9435E39); DaiJoin public constant daiJoin = DaiJoin(DAI_JOIN_ADDRESS); Spotter public constant spotter = Spotter(SPOTTER_ADDRESS); Vat public constant vat = Vat(VAT_ADDRESS); struct CloseData { uint cdpId; uint collAmount; uint daiAmount; uint minAccepted; address joinAddr; address proxy; uint flFee; bool toDai; address reserve; uint amount; } constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public {} function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { ( uint[8] memory numData, address[5] memory addrData, bytes memory callData, address proxy, bool toDai ) = abi.decode(_params, (uint256[8],address[5],bytes,address,bool)); ExchangeData memory exchangeData = ExchangeData({ srcAddr: addrData[0], destAddr: addrData[1], srcAmount: numData[4], destAmount: numData[5], minPrice: numData[6], wrapper: addrData[3], exchangeAddr: addrData[2], callData: callData, price0x: numData[7] }); CloseData memory closeData = CloseData({ cdpId: numData[0], collAmount: numData[1], daiAmount: numData[2], minAccepted: numData[3], joinAddr: addrData[4], proxy: proxy, flFee: _fee, toDai: toDai, reserve: _reserve, amount: _amount }); address user = DSProxy(payable(closeData.proxy)).owner(); closeCDP(closeData, exchangeData, user); } function closeCDP( CloseData memory _closeData, ExchangeData memory _exchangeData, address _user ) internal { paybackDebt(_closeData.cdpId, manager.ilks(_closeData.cdpId), _closeData.daiAmount); // payback whole debt uint drawnAmount = drawMaxCollateral(_closeData.cdpId, _closeData.joinAddr, _closeData.collAmount); // draw whole collateral uint daiSwaped = 0; uint dfsFee = 0; if (_closeData.toDai) { _exchangeData.srcAmount = drawnAmount; (, daiSwaped) = _sell(_exchangeData); dfsFee = getFee(daiSwaped, _user); } else { dfsFee = getFee(_closeData.daiAmount, _user); _exchangeData.destAmount = (_closeData.daiAmount + _closeData.flFee + dfsFee); (, daiSwaped) = _buy(_exchangeData); } takeFee(dfsFee); address tokenAddr = getVaultCollAddr(_closeData.joinAddr); if (_closeData.toDai) { tokenAddr = DAI_ADDRESS; } require(getBalance(tokenAddr) >= _closeData.minAccepted, "Below min. number of eth specified"); transferFundsBackToPoolInternal(_closeData.reserve, _closeData.amount.add(_closeData.flFee)); sendLeftover(tokenAddr, DAI_ADDRESS, payable(_user)); } function drawMaxCollateral(uint _cdpId, address _joinAddr, uint _amount) internal returns (uint) { manager.frob(_cdpId, -toPositiveInt(_amount), 0); manager.flux(_cdpId, address(this), _amount); uint joinAmount = _amount; if (Join(_joinAddr).dec() != 18) { joinAmount = _amount / (10 ** (18 - Join(_joinAddr).dec())); } Join(_joinAddr).exit(address(this), joinAmount); if (isEthJoinAddr(_joinAddr)) { Join(_joinAddr).gem().withdraw(joinAmount); // Weth -> Eth } return joinAmount; } function paybackDebt(uint _cdpId, bytes32 _ilk, uint _daiAmount) internal { address urn = manager.urns(_cdpId); daiJoin.dai().approve(DAI_JOIN_ADDRESS, _daiAmount); daiJoin.join(urn, _daiAmount); manager.frob(_cdpId, 0, normalizePaybackAmount(VAT_ADDRESS, urn, _ilk)); } function takeFee(uint _feeAmount) internal returns (uint) { ERC20(DAI_ADDRESS).transfer(WALLET_ID, _feeAmount); } function getFee(uint _amount, address _owner) internal view returns (uint feeAmount) { uint fee = SERVICE_FEE; if (Discount(DISCOUNT_ADDRESS).isCustomFeeSet(_owner)) { fee = Discount(DISCOUNT_ADDRESS).getCustomServiceFee(_owner); } feeAmount = (fee == 0) ? 0 : (_amount / fee); // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } } function getVaultCollAddr(address _joinAddr) internal view returns (address) { address tokenAddr = address(Join(_joinAddr).gem()); if (tokenAddr == WETH_ADDRESS) { return KYBER_ETH_ADDRESS; } return tokenAddr; } function getPrice(bytes32 _ilk) public view returns (uint256) { (, uint256 mat) = spotter.ilks(_ilk); (, , uint256 spot, , ) = vat.ilks(_ilk); return rmul(rmul(spot, spotter.par()), mat); } receive() external override(FlashLoanReceiverBase, SaverExchangeCore) payable {} } contract MCDCloseTaker is MCDSaverProxyHelper { address public constant SUBSCRIPTION_ADDRESS_NEW = 0xC45d4f6B6bf41b6EdAA58B01c4298B8d9078269a; address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); // solhint-disable-next-line const-name-snakecase Manager public constant manager = Manager(0x5ef30b9986345249bc32d8928B7ee64DE9435E39); address public constant SPOTTER_ADDRESS = 0x65C79fcB50Ca1594B025960e539eD7A9a6D434A3; address public constant VAT_ADDRESS = 0x35D1b3F3D7966A1DFe207aa4514C12a259A0492B; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; // solhint-disable-next-line const-name-snakecase DefisaverLogger public constant logger = DefisaverLogger(DEFISAVER_LOGGER); struct CloseData { uint cdpId; address joinAddr; uint collAmount; uint daiAmount; uint minAccepted; bool wholeDebt; bool toDai; } Vat public constant vat = Vat(VAT_ADDRESS); Spotter public constant spotter = Spotter(SPOTTER_ADDRESS); function closeWithLoan( SaverExchangeCore.ExchangeData memory _exchangeData, CloseData memory _closeData, address payable mcdCloseFlashLoan ) public payable { mcdCloseFlashLoan.transfer(msg.value); // 0x fee if (_closeData.wholeDebt) { _closeData.daiAmount = getAllDebt( VAT_ADDRESS, manager.urns(_closeData.cdpId), manager.urns(_closeData.cdpId), manager.ilks(_closeData.cdpId) ); (_closeData.collAmount, ) = getCdpInfo(manager, _closeData.cdpId, manager.ilks(_closeData.cdpId)); } manager.cdpAllow(_closeData.cdpId, mcdCloseFlashLoan, 1); (uint[8] memory numData, address[5] memory addrData, bytes memory callData) = _packData(_closeData, _exchangeData); bytes memory paramsData = abi.encode(numData, addrData, callData, address(this), _closeData.toDai); lendingPool.flashLoan(mcdCloseFlashLoan, DAI_ADDRESS, _closeData.daiAmount, paramsData); manager.cdpAllow(_closeData.cdpId, mcdCloseFlashLoan, 0); // If sub. to automatic protection unsubscribe unsubscribe(SUBSCRIPTION_ADDRESS_NEW, _closeData.cdpId); logger.Log(address(this), msg.sender, "MCDClose", abi.encode(_closeData.cdpId, _closeData.collAmount, _closeData.daiAmount, _closeData.toDai)); } /// @notice Gets the maximum amount of debt available to generate /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP function getMaxDebt(uint256 _cdpId, bytes32 _ilk) public view returns (uint256) { uint256 price = getPrice(_ilk); (, uint256 mat) = spotter.ilks(_ilk); (uint256 collateral, uint256 debt) = getCdpInfo(manager, _cdpId, _ilk); return sub(wdiv(wmul(collateral, price), mat), debt); } /// @notice Gets a price of the asset /// @param _ilk Ilk of the CDP function getPrice(bytes32 _ilk) public view returns (uint256) { (, uint256 mat) = spotter.ilks(_ilk); (, , uint256 spot, , ) = vat.ilks(_ilk); return rmul(rmul(spot, spotter.par()), mat); } function unsubscribe(address _subContract, uint _cdpId) internal { (, bool isSubscribed) = IMCDSubscriptions(_subContract).subscribersPos(_cdpId); if (isSubscribed) { IMCDSubscriptions(_subContract).unsubscribe(_cdpId); } } function _packData( CloseData memory _closeData, SaverExchangeCore.ExchangeData memory exchangeData ) internal pure returns (uint[8] memory numData, address[5] memory addrData, bytes memory callData) { numData = [ _closeData.cdpId, _closeData.collAmount, _closeData.daiAmount, _closeData.minAccepted, exchangeData.srcAmount, exchangeData.destAmount, exchangeData.minPrice, exchangeData.price0x ]; addrData = [ exchangeData.srcAddr, exchangeData.destAddr, exchangeData.exchangeAddr, exchangeData.wrapper, _closeData.joinAddr ]; callData = exchangeData.callData; } } contract MCDCreateFlashLoan is SaverExchangeCore, AdminAuth, FlashLoanReceiverBase { address public constant CREATE_PROXY_ACTIONS = 0x6d0984E80a86f26c0dd564ca0CF74a8E9Da03305; uint public constant SERVICE_FEE = 400; // 0.25% Fee address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); address public constant DAI_JOIN_ADDRESS = 0x9759A6Ac90977b93B58547b4A71c78317f391A28; address public constant JUG_ADDRESS = 0x19c0976f590D67707E62397C87829d896Dc0f1F1; address public constant MANAGER_ADDRESS = 0x5ef30b9986345249bc32d8928B7ee64DE9435E39; constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public {} function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { //check the contract has the specified balance require(_amount <= getBalanceInternal(address(this), _reserve), "Invalid balance for the contract"); ( uint[6] memory numData, address[5] memory addrData, bytes memory callData, address proxy ) = abi.decode(_params, (uint256[6],address[5],bytes,address)); ExchangeData memory exchangeData = ExchangeData({ srcAddr: addrData[0], destAddr: addrData[1], srcAmount: numData[2], destAmount: numData[3], minPrice: numData[4], wrapper: addrData[3], exchangeAddr: addrData[2], callData: callData, price0x: numData[5] }); openAndLeverage(numData[0], numData[1] + _fee, addrData[4], proxy, exchangeData); transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } } function openAndLeverage( uint _collAmount, uint _daiAmountAndFee, address _joinAddr, address _proxy, ExchangeData memory _exchangeData ) public { uint dfsFee = getFee(_exchangeData.srcAmount, DSProxy(payable(_proxy)).owner()); _exchangeData.srcAmount = (_exchangeData.srcAmount - dfsFee); (, uint256 collSwaped) = _sell(_exchangeData); bytes32 ilk = Join(_joinAddr).ilk(); if (isEthJoinAddr(_joinAddr)) { MCDCreateProxyActions(CREATE_PROXY_ACTIONS).openLockETHAndDraw{value: address(this).balance}( MANAGER_ADDRESS, JUG_ADDRESS, _joinAddr, DAI_JOIN_ADDRESS, ilk, _daiAmountAndFee, _proxy ); } else { ERC20(address(Join(_joinAddr).gem())).safeApprove(CREATE_PROXY_ACTIONS, uint256(-1)); MCDCreateProxyActions(CREATE_PROXY_ACTIONS).openLockGemAndDraw( MANAGER_ADDRESS, JUG_ADDRESS, _joinAddr, DAI_JOIN_ADDRESS, ilk, (_collAmount + collSwaped), _daiAmountAndFee, true, _proxy ); } } function getFee(uint _amount, address _owner) internal returns (uint feeAmount) { uint fee = SERVICE_FEE; if (Discount(DISCOUNT_ADDRESS).isCustomFeeSet(_owner)) { fee = Discount(DISCOUNT_ADDRESS).getCustomServiceFee(_owner); } feeAmount = (fee == 0) ? 0 : (_amount / fee); // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } ERC20(DAI_ADDRESS).transfer(WALLET_ID, feeAmount); } /// @notice Checks if the join address is one of the Ether coll. types /// @param _joinAddr Join address to check function isEthJoinAddr(address _joinAddr) internal view returns (bool) { // if it's dai_join_addr don't check gem() it will fail if (_joinAddr == 0x9759A6Ac90977b93B58547b4A71c78317f391A28) return false; // if coll is weth it's and eth type coll if (address(Join(_joinAddr).gem()) == 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2) { return true; } return false; } receive() external override(FlashLoanReceiverBase, SaverExchangeCore) payable {} } contract MCDSaverProxy is SaverExchangeCore, MCDSaverProxyHelper { uint public constant MANUAL_SERVICE_FEE = 400; // 0.25% Fee uint public constant AUTOMATIC_SERVICE_FEE = 333; // 0.3% Fee bytes32 public constant ETH_ILK = 0x4554482d41000000000000000000000000000000000000000000000000000000; address public constant MANAGER_ADDRESS = 0x5ef30b9986345249bc32d8928B7ee64DE9435E39; address public constant VAT_ADDRESS = 0x35D1b3F3D7966A1DFe207aa4514C12a259A0492B; address public constant SPOTTER_ADDRESS = 0x65C79fcB50Ca1594B025960e539eD7A9a6D434A3; address public constant DAI_JOIN_ADDRESS = 0x9759A6Ac90977b93B58547b4A71c78317f391A28; address public constant JUG_ADDRESS = 0x19c0976f590D67707E62397C87829d896Dc0f1F1; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; address public constant BOT_REGISTRY_ADDRESS = 0x637726f8b08a7ABE3aE3aCaB01A80E2d8ddeF77B; Manager public constant manager = Manager(MANAGER_ADDRESS); Vat public constant vat = Vat(VAT_ADDRESS); DaiJoin public constant daiJoin = DaiJoin(DAI_JOIN_ADDRESS); Spotter public constant spotter = Spotter(SPOTTER_ADDRESS); DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); /// @notice Repay - draws collateral, converts to Dai and repays the debt /// @dev Must be called by the DSProxy contract that owns the CDP function repay( SaverExchangeCore.ExchangeData memory _exchangeData, uint _cdpId, uint _gasCost, address _joinAddr ) public payable { address owner = getOwner(manager, _cdpId); bytes32 ilk = manager.ilks(_cdpId); drawCollateral(_cdpId, _joinAddr, _exchangeData.srcAmount); (, uint daiAmount) = _sell(_exchangeData); uint daiAfterFee = sub(daiAmount, getFee(daiAmount, _gasCost, owner)); paybackDebt(_cdpId, ilk, daiAfterFee, owner); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } logger.Log(address(this), msg.sender, "MCDRepay", abi.encode(_cdpId, owner, _exchangeData.srcAmount, daiAmount)); } /// @notice Boost - draws Dai, converts to collateral and adds to CDP /// @dev Must be called by the DSProxy contract that owns the CDP function boost( SaverExchangeCore.ExchangeData memory _exchangeData, uint _cdpId, uint _gasCost, address _joinAddr ) public payable { address owner = getOwner(manager, _cdpId); bytes32 ilk = manager.ilks(_cdpId); uint daiDrawn = drawDai(_cdpId, ilk, _exchangeData.srcAmount); uint daiAfterFee = sub(daiDrawn, getFee(daiDrawn, _gasCost, owner)); _exchangeData.srcAmount = daiAfterFee; (, uint swapedColl) = _sell(_exchangeData); addCollateral(_cdpId, _joinAddr, swapedColl); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } logger.Log(address(this), msg.sender, "MCDBoost", abi.encode(_cdpId, owner, _exchangeData.srcAmount, swapedColl)); } /// @notice Draws Dai from the CDP /// @dev If _daiAmount is bigger than max available we'll draw max /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP /// @param _daiAmount Amount of Dai to draw function drawDai(uint _cdpId, bytes32 _ilk, uint _daiAmount) internal returns (uint) { uint rate = Jug(JUG_ADDRESS).drip(_ilk); uint daiVatBalance = vat.dai(manager.urns(_cdpId)); uint maxAmount = getMaxDebt(_cdpId, _ilk); if (_daiAmount >= maxAmount) { _daiAmount = sub(maxAmount, 1); } manager.frob(_cdpId, int(0), normalizeDrawAmount(_daiAmount, rate, daiVatBalance)); manager.move(_cdpId, address(this), toRad(_daiAmount)); if (vat.can(address(this), address(DAI_JOIN_ADDRESS)) == 0) { vat.hope(DAI_JOIN_ADDRESS); } DaiJoin(DAI_JOIN_ADDRESS).exit(address(this), _daiAmount); return _daiAmount; } /// @notice Adds collateral to the CDP /// @param _cdpId Id of the CDP /// @param _joinAddr Address of the join contract for the CDP collateral /// @param _amount Amount of collateral to add function addCollateral(uint _cdpId, address _joinAddr, uint _amount) internal { int convertAmount = 0; if (isEthJoinAddr(_joinAddr)) { Join(_joinAddr).gem().deposit{value: _amount}(); convertAmount = toPositiveInt(_amount); } else { convertAmount = toPositiveInt(convertTo18(_joinAddr, _amount)); } ERC20(address(Join(_joinAddr).gem())).safeApprove(_joinAddr, _amount); Join(_joinAddr).join(address(this), _amount); vat.frob( manager.ilks(_cdpId), manager.urns(_cdpId), address(this), address(this), convertAmount, 0 ); } /// @notice Draws collateral and returns it to DSProxy /// @dev If _amount is bigger than max available we'll draw max /// @param _cdpId Id of the CDP /// @param _joinAddr Address of the join contract for the CDP collateral /// @param _amount Amount of collateral to draw function drawCollateral(uint _cdpId, address _joinAddr, uint _amount) internal returns (uint) { uint frobAmount = _amount; if (Join(_joinAddr).dec() != 18) { frobAmount = _amount * (10 ** (18 - Join(_joinAddr).dec())); } manager.frob(_cdpId, -toPositiveInt(frobAmount), 0); manager.flux(_cdpId, address(this), frobAmount); Join(_joinAddr).exit(address(this), _amount); if (isEthJoinAddr(_joinAddr)) { Join(_joinAddr).gem().withdraw(_amount); // Weth -> Eth } return _amount; } /// @notice Paybacks Dai debt /// @dev If the _daiAmount is bigger than the whole debt, returns extra Dai /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP /// @param _daiAmount Amount of Dai to payback /// @param _owner Address that owns the DSProxy that owns the CDP function paybackDebt(uint _cdpId, bytes32 _ilk, uint _daiAmount, address _owner) internal { address urn = manager.urns(_cdpId); uint wholeDebt = getAllDebt(VAT_ADDRESS, urn, urn, _ilk); if (_daiAmount > wholeDebt) { ERC20(DAI_ADDRESS).transfer(_owner, sub(_daiAmount, wholeDebt)); _daiAmount = wholeDebt; } if (ERC20(DAI_ADDRESS).allowance(address(this), DAI_JOIN_ADDRESS) == 0) { ERC20(DAI_ADDRESS).approve(DAI_JOIN_ADDRESS, uint(-1)); } daiJoin.join(urn, _daiAmount); manager.frob(_cdpId, 0, normalizePaybackAmount(VAT_ADDRESS, urn, _ilk)); } /// @notice Calculates the fee amount /// @param _amount Dai amount that is converted /// @param _gasCost Used for Monitor, estimated gas cost of tx /// @param _owner The address that controlls the DSProxy that owns the CDP function getFee(uint _amount, uint _gasCost, address _owner) internal returns (uint feeAmount) { uint fee = MANUAL_SERVICE_FEE; if (BotRegistry(BOT_REGISTRY_ADDRESS).botList(tx.origin)) { fee = AUTOMATIC_SERVICE_FEE; } if (Discount(DISCOUNT_ADDRESS).isCustomFeeSet(_owner)) { fee = Discount(DISCOUNT_ADDRESS).getCustomServiceFee(_owner); } feeAmount = (fee == 0) ? 0 : (_amount / fee); if (_gasCost != 0) { uint ethDaiPrice = getPrice(ETH_ILK); _gasCost = rmul(_gasCost, ethDaiPrice); feeAmount = add(feeAmount, _gasCost); } // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } ERC20(DAI_ADDRESS).transfer(WALLET_ID, feeAmount); } /// @notice Gets the maximum amount of collateral available to draw /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP /// @param _joinAddr Joind address of collateral /// @dev Substracts 10 wei to aviod rounding error later on function getMaxCollateral(uint _cdpId, bytes32 _ilk, address _joinAddr) public view returns (uint) { uint price = getPrice(_ilk); (uint collateral, uint debt) = getCdpInfo(manager, _cdpId, _ilk); (, uint mat) = Spotter(SPOTTER_ADDRESS).ilks(_ilk); uint maxCollateral = sub(collateral, (div(mul(mat, debt), price))); uint normalizeMaxCollateral = maxCollateral / (10 ** (18 - Join(_joinAddr).dec())); // take one percent due to precision issues return normalizeMaxCollateral * 99 / 100; } /// @notice Gets the maximum amount of debt available to generate /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP /// @dev Substracts 10 wei to aviod rounding error later on function getMaxDebt(uint _cdpId, bytes32 _ilk) public virtual view returns (uint) { uint price = getPrice(_ilk); (, uint mat) = spotter.ilks(_ilk); (uint collateral, uint debt) = getCdpInfo(manager, _cdpId, _ilk); return sub(sub(div(mul(collateral, price), mat), debt), 10); } /// @notice Gets a price of the asset /// @param _ilk Ilk of the CDP function getPrice(bytes32 _ilk) public view returns (uint) { (, uint mat) = spotter.ilks(_ilk); (,,uint spot,,) = vat.ilks(_ilk); return rmul(rmul(spot, spotter.par()), mat); } /// @notice Gets CDP ratio /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP function getRatio(uint _cdpId, bytes32 _ilk) public view returns (uint) { uint price = getPrice( _ilk); (uint collateral, uint debt) = getCdpInfo(manager, _cdpId, _ilk); if (debt == 0) return 0; return rdiv(wmul(collateral, price), debt); } /// @notice Gets CDP info (collateral, debt, price, ilk) /// @param _cdpId Id of the CDP function getCdpDetailedInfo(uint _cdpId) public view returns (uint collateral, uint debt, uint price, bytes32 ilk) { address urn = manager.urns(_cdpId); ilk = manager.ilks(_cdpId); (collateral, debt) = vat.urns(ilk, urn); (,uint rate,,,) = vat.ilks(ilk); debt = rmul(debt, rate); price = getPrice(ilk); } } contract MCDSaverTaker is MCDSaverProxy, GasBurner { address payable public constant MCD_SAVER_FLASH_LOAN = 0xec504C93A40A557cC85dAc3e908E85A887438079; address public constant AAVE_POOL_CORE = 0x3dfd23A6c5E8BbcFc9581d2E864a68feb6a076d3; ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); function boostWithLoan( SaverExchangeCore.ExchangeData memory _exchangeData, uint _cdpId, uint _gasCost, address _joinAddr ) public payable burnGas(25) { uint256 maxDebt = getMaxDebt(_cdpId, manager.ilks(_cdpId)); uint maxLiq = getAvailableLiquidity(DAI_JOIN_ADDRESS); if (maxDebt >= _exchangeData.srcAmount || maxLiq == 0) { if (_exchangeData.srcAmount > maxDebt) { _exchangeData.srcAmount = maxDebt; } boost(_exchangeData, _cdpId, _gasCost, _joinAddr); return; } uint256 loanAmount = sub(_exchangeData.srcAmount, maxDebt); loanAmount = loanAmount > maxLiq ? maxLiq : loanAmount; MCD_SAVER_FLASH_LOAN.transfer(msg.value); // 0x fee manager.cdpAllow(_cdpId, MCD_SAVER_FLASH_LOAN, 1); bytes memory paramsData = abi.encode(packExchangeData(_exchangeData), _cdpId, _gasCost, _joinAddr, false); lendingPool.flashLoan(MCD_SAVER_FLASH_LOAN, DAI_ADDRESS, loanAmount, paramsData); manager.cdpAllow(_cdpId, MCD_SAVER_FLASH_LOAN, 0); } function repayWithLoan( SaverExchangeCore.ExchangeData memory _exchangeData, uint _cdpId, uint _gasCost, address _joinAddr ) public payable burnGas(25) { uint256 maxColl = getMaxCollateral(_cdpId, manager.ilks(_cdpId), _joinAddr); uint maxLiq = getAvailableLiquidity(_joinAddr); if (maxColl >= _exchangeData.srcAmount || maxLiq == 0) { if (_exchangeData.srcAmount > maxColl) { _exchangeData.srcAmount = maxColl; } repay(_exchangeData, _cdpId, _gasCost, _joinAddr); return; } uint256 loanAmount = sub(_exchangeData.srcAmount, maxColl); loanAmount = loanAmount > maxLiq ? maxLiq : loanAmount; MCD_SAVER_FLASH_LOAN.transfer(msg.value); // 0x fee manager.cdpAllow(_cdpId, MCD_SAVER_FLASH_LOAN, 1); bytes memory paramsData = abi.encode(packExchangeData(_exchangeData), _cdpId, _gasCost, _joinAddr, true); lendingPool.flashLoan(MCD_SAVER_FLASH_LOAN, getAaveCollAddr(_joinAddr), loanAmount, paramsData); manager.cdpAllow(_cdpId, MCD_SAVER_FLASH_LOAN, 0); } /// @notice Gets the maximum amount of debt available to generate /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP function getMaxDebt(uint256 _cdpId, bytes32 _ilk) public override view returns (uint256) { uint256 price = getPrice(_ilk); (, uint256 mat) = spotter.ilks(_ilk); (uint256 collateral, uint256 debt) = getCdpInfo(manager, _cdpId, _ilk); return sub(wdiv(wmul(collateral, price), mat), debt); } function getAaveCollAddr(address _joinAddr) internal view returns (address) { if (isEthJoinAddr(_joinAddr) || _joinAddr == 0x775787933e92b709f2a3C70aa87999696e74A9F8) { return KYBER_ETH_ADDRESS; } else if (_joinAddr == DAI_JOIN_ADDRESS) { return DAI_ADDRESS; } else { return getCollateralAddr(_joinAddr); } } function getAvailableLiquidity(address _joinAddr) internal view returns (uint liquidity) { address tokenAddr = getAaveCollAddr(_joinAddr); if (tokenAddr == KYBER_ETH_ADDRESS) { liquidity = AAVE_POOL_CORE.balance; } else { liquidity = ERC20(tokenAddr).balanceOf(AAVE_POOL_CORE); } } function _packData( uint _cdpId, uint _gasCost, address _joinAddr, SaverExchangeCore.ExchangeData memory exchangeData ) internal pure returns (uint[6] memory numData, address[5] memory addrData, bytes memory callData) { numData = [ exchangeData.srcAmount, exchangeData.destAmount, exchangeData.minPrice, exchangeData.price0x, _cdpId, _gasCost ]; addrData = [ exchangeData.srcAddr, exchangeData.destAddr, exchangeData.exchangeAddr, exchangeData.wrapper, _joinAddr ]; callData = exchangeData.callData; } } contract SavingsProxy is DSRSavingsProtocol, CompoundSavingsProtocol { address public constant ADAI_ADDRESS = 0xfC1E690f61EFd961294b3e1Ce3313fBD8aa4f85d; address public constant SAVINGS_DYDX_ADDRESS = 0x03b1565e070df392e48e7a8e01798C4B00E534A5; address public constant SAVINGS_AAVE_ADDRESS = 0x535B9035E9bA8D7efe0FeAEac885fb65b303E37C; address public constant NEW_IDAI_ADDRESS = 0x493C57C4763932315A328269E1ADaD09653B9081; address public constant COMP_ADDRESS = 0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B; address public constant SAVINGS_LOGGER_ADDRESS = 0x89b3635BD2bAD145C6f92E82C9e83f06D5654984; address public constant SOLO_MARGIN_ADDRESS = 0x1E0447b19BB6EcFdAe1e4AE1694b0C3659614e4e; enum SavingsProtocol {Compound, Dydx, Fulcrum, Dsr, Aave} function deposit(SavingsProtocol _protocol, uint256 _amount) public { if (_protocol == SavingsProtocol.Dsr) { dsrDeposit(_amount, true); } else if (_protocol == SavingsProtocol.Compound) { compDeposit(msg.sender, _amount); } else { _deposit(_protocol, _amount, true); } SavingsLogger(SAVINGS_LOGGER_ADDRESS).logDeposit(msg.sender, uint8(_protocol), _amount); } function withdraw(SavingsProtocol _protocol, uint256 _amount) public { if (_protocol == SavingsProtocol.Dsr) { dsrWithdraw(_amount, true); } else if (_protocol == SavingsProtocol.Compound) { compWithdraw(msg.sender, _amount); } else { _withdraw(_protocol, _amount, true); } SavingsLogger(SAVINGS_LOGGER_ADDRESS).logWithdraw(msg.sender, uint8(_protocol), _amount); } function swap(SavingsProtocol _from, SavingsProtocol _to, uint256 _amount) public { if (_from == SavingsProtocol.Dsr) { dsrWithdraw(_amount, false); } else if (_from == SavingsProtocol.Compound) { compWithdraw(msg.sender, _amount); } else { _withdraw(_from, _amount, false); } // possible to withdraw 1-2 wei less than actual amount due to division precision // so we deposit all amount on DSProxy uint256 amountToDeposit = ERC20(DAI_ADDRESS).balanceOf(address(this)); if (_to == SavingsProtocol.Dsr) { dsrDeposit(amountToDeposit, false); } else if (_from == SavingsProtocol.Compound) { compDeposit(msg.sender, _amount); } else { _deposit(_to, amountToDeposit, false); } SavingsLogger(SAVINGS_LOGGER_ADDRESS).logSwap( msg.sender, uint8(_from), uint8(_to), _amount ); } function withdrawDai() public { ERC20(DAI_ADDRESS).transfer(msg.sender, ERC20(DAI_ADDRESS).balanceOf(address(this))); } function claimComp() public { ComptrollerInterface(COMP_ADDRESS).claimComp(address(this)); } function getAddress(SavingsProtocol _protocol) public pure returns (address) { if (_protocol == SavingsProtocol.Dydx) { return SAVINGS_DYDX_ADDRESS; } if (_protocol == SavingsProtocol.Aave) { return SAVINGS_AAVE_ADDRESS; } } function _deposit(SavingsProtocol _protocol, uint256 _amount, bool _fromUser) internal { if (_fromUser) { ERC20(DAI_ADDRESS).transferFrom(msg.sender, address(this), _amount); } approveDeposit(_protocol); ProtocolInterface(getAddress(_protocol)).deposit(address(this), _amount); endAction(_protocol); } function _withdraw(SavingsProtocol _protocol, uint256 _amount, bool _toUser) public { approveWithdraw(_protocol); ProtocolInterface(getAddress(_protocol)).withdraw(address(this), _amount); endAction(_protocol); if (_toUser) { withdrawDai(); } } function endAction(SavingsProtocol _protocol) internal { if (_protocol == SavingsProtocol.Dydx) { setDydxOperator(false); } } function approveDeposit(SavingsProtocol _protocol) internal { if (_protocol == SavingsProtocol.Compound || _protocol == SavingsProtocol.Fulcrum || _protocol == SavingsProtocol.Aave) { ERC20(DAI_ADDRESS).approve(getAddress(_protocol), uint256(-1)); } if (_protocol == SavingsProtocol.Dydx) { ERC20(DAI_ADDRESS).approve(SOLO_MARGIN_ADDRESS, uint256(-1)); setDydxOperator(true); } } function approveWithdraw(SavingsProtocol _protocol) internal { if (_protocol == SavingsProtocol.Compound) { ERC20(NEW_CDAI_ADDRESS).approve(getAddress(_protocol), uint256(-1)); } if (_protocol == SavingsProtocol.Dydx) { setDydxOperator(true); } if (_protocol == SavingsProtocol.Fulcrum) { ERC20(NEW_IDAI_ADDRESS).approve(getAddress(_protocol), uint256(-1)); } if (_protocol == SavingsProtocol.Aave) { ERC20(ADAI_ADDRESS).approve(getAddress(_protocol), uint256(-1)); } } function setDydxOperator(bool _trusted) internal { ISoloMargin.OperatorArg[] memory operatorArgs = new ISoloMargin.OperatorArg[](1); operatorArgs[0] = ISoloMargin.OperatorArg({ operator: getAddress(SavingsProtocol.Dydx), trusted: _trusted }); ISoloMargin(SOLO_MARGIN_ADDRESS).setOperators(operatorArgs); } } contract LoanShifterReceiver is SaverExchangeCore, FlashLoanReceiverBase, AdminAuth { address payable public constant WALLET_ADDR = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; address public constant DISCOUNT_ADDR = 0x1b14E8D511c9A4395425314f849bD737BAF8208F; ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; ShifterRegistry public constant shifterRegistry = ShifterRegistry(0x597C52281b31B9d949a9D8fEbA08F7A2530a965e); struct ParamData { bytes proxyData1; bytes proxyData2; address proxy; address debtAddr; uint8 protocol1; uint8 protocol2; uint8 swapType; } constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public {} function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { // Format the call data for DSProxy (ParamData memory paramData, ExchangeData memory exchangeData) = packFunctionCall(_amount, _fee, _params); address protocolAddr1 = shifterRegistry.getAddr(getNameByProtocol(paramData.protocol1)); address protocolAddr2 = shifterRegistry.getAddr(getNameByProtocol(paramData.protocol2)); // Send Flash loan amount to DSProxy sendToProxy(payable(paramData.proxy), _reserve, _amount); // Execute the Close/Change debt operation DSProxyInterface(paramData.proxy).execute(protocolAddr1, paramData.proxyData1); if (paramData.swapType == 1) { // COLL_SWAP exchangeData.srcAmount -= getFee(getBalance(exchangeData.srcAddr), exchangeData.srcAddr, paramData.proxy); (, uint amount) = _sell(exchangeData); sendToProxy(payable(paramData.proxy), exchangeData.destAddr, amount); } else if (paramData.swapType == 2) { // DEBT_SWAP exchangeData.srcAmount -= getFee(exchangeData.srcAmount, exchangeData.srcAddr, paramData.proxy); exchangeData.destAmount = (_amount + _fee); _buy(exchangeData); // Send extra to DSProxy sendToProxy(payable(paramData.proxy), exchangeData.srcAddr, ERC20(exchangeData.srcAddr).balanceOf(address(this))); } else { // NO_SWAP just send tokens to proxy sendToProxy(payable(paramData.proxy), exchangeData.srcAddr, getBalance(exchangeData.srcAddr)); } // Execute the Open operation DSProxyInterface(paramData.proxy).execute(protocolAddr2, paramData.proxyData2); // Repay FL transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } } function packFunctionCall(uint _amount, uint _fee, bytes memory _params) internal pure returns (ParamData memory paramData, ExchangeData memory exchangeData) { ( uint[8] memory numData, // collAmount, debtAmount, id1, id2, srcAmount, destAmount, minPrice, price0x address[8] memory addrData, // addrLoan1, addrLoan2, debtAddr1, debtAddr2, srcAddr, destAddr, exchangeAddr, wrapper uint8[3] memory enumData, // fromProtocol, toProtocol, swapType bytes memory callData, address proxy ) = abi.decode(_params, (uint256[8],address[8],uint8[3],bytes,address)); bytes memory proxyData1; bytes memory proxyData2; uint openDebtAmount = (_amount + _fee); if (enumData[0] == 0) { // MAKER FROM proxyData1 = abi.encodeWithSignature("close(uint256,address,uint256,uint256)", numData[2], addrData[0], _amount, numData[0]); } else if(enumData[0] == 1) { // COMPOUND FROM if (enumData[2] == 2) { // DEBT_SWAP proxyData1 = abi.encodeWithSignature("changeDebt(address,address,uint256,uint256)", addrData[2], addrData[3], _amount, numData[4]); } else { proxyData1 = abi.encodeWithSignature("close(address,address,uint256,uint256)", addrData[0], addrData[2], numData[0], numData[1]); } } if (enumData[1] == 0) { // MAKER TO proxyData2 = abi.encodeWithSignature("open(uint256,address,uint256)", numData[3], addrData[1], openDebtAmount); } else if(enumData[1] == 1) { // COMPOUND TO if (enumData[2] == 2) { // DEBT_SWAP proxyData2 = abi.encodeWithSignature("repayAll(address)", addrData[3]); } else { proxyData2 = abi.encodeWithSignature("open(address,address,uint256)", addrData[1], addrData[3], openDebtAmount); } } paramData = ParamData({ proxyData1: proxyData1, proxyData2: proxyData2, proxy: proxy, debtAddr: addrData[2], protocol1: enumData[0], protocol2: enumData[1], swapType: enumData[2] }); exchangeData = SaverExchangeCore.ExchangeData({ srcAddr: addrData[4], destAddr: addrData[5], srcAmount: numData[4], destAmount: numData[5], minPrice: numData[6], wrapper: addrData[7], exchangeAddr: addrData[6], callData: callData, price0x: numData[7] }); } function sendToProxy(address payable _proxy, address _reserve, uint _amount) internal { if (_reserve != ETH_ADDRESS) { ERC20(_reserve).safeTransfer(_proxy, _amount); } _proxy.transfer(address(this).balance); } function getNameByProtocol(uint8 _proto) internal pure returns (string memory) { if (_proto == 0) { return "MCD_SHIFTER"; } else if (_proto == 1) { return "COMP_SHIFTER"; } } function getFee(uint _amount, address _tokenAddr, address _proxy) internal returns (uint feeAmount) { uint fee = 400; DSProxyInterface proxy = DSProxyInterface(payable(_proxy)); address user = proxy.owner(); if (Discount(DISCOUNT_ADDR).isCustomFeeSet(user)) { fee = Discount(DISCOUNT_ADDR).getCustomServiceFee(user); } feeAmount = (fee == 0) ? 0 : (_amount / fee); // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } if (_tokenAddr == ETH_ADDRESS) { WALLET_ADDR.transfer(feeAmount); } else { ERC20(_tokenAddr).safeTransfer(WALLET_ADDR, feeAmount); } } receive() external override(FlashLoanReceiverBase, SaverExchangeCore) payable {} } contract LoanShifterTaker is AdminAuth, ProxyPermission, GasBurner { ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; address public constant MCD_SUB_ADDRESS = 0xC45d4f6B6bf41b6EdAA58B01c4298B8d9078269a; address public constant COMPOUND_SUB_ADDRESS = 0x52015EFFD577E08f498a0CCc11905925D58D6207; address public constant MANAGER_ADDRESS = 0x5ef30b9986345249bc32d8928B7ee64DE9435E39; address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; Manager public constant manager = Manager(MANAGER_ADDRESS); ShifterRegistry public constant shifterRegistry = ShifterRegistry(0x597C52281b31B9d949a9D8fEbA08F7A2530a965e); enum Protocols { MCD, COMPOUND } enum SwapType { NO_SWAP, COLL_SWAP, DEBT_SWAP } enum Unsub { NO_UNSUB, FIRST_UNSUB, SECOND_UNSUB, BOTH_UNSUB } struct LoanShiftData { Protocols fromProtocol; Protocols toProtocol; SwapType swapType; Unsub unsub; bool wholeDebt; uint collAmount; uint debtAmount; address debtAddr1; address debtAddr2; address addrLoan1; address addrLoan2; uint id1; uint id2; } /// @notice Main entry point, it will move or transform a loan /// @dev Called through DSProxy function moveLoan( SaverExchangeCore.ExchangeData memory _exchangeData, LoanShiftData memory _loanShift ) public payable burnGas(20) { if (_isSameTypeVaults(_loanShift)) { _forkVault(_loanShift); logEvent(_exchangeData, _loanShift); return; } _callCloseAndOpen(_exchangeData, _loanShift); } //////////////////////// INTERNAL FUNCTIONS ////////////////////////// function _callCloseAndOpen( SaverExchangeCore.ExchangeData memory _exchangeData, LoanShiftData memory _loanShift ) internal { address protoAddr = shifterRegistry.getAddr(getNameByProtocol(uint8(_loanShift.fromProtocol))); if (_loanShift.wholeDebt) { _loanShift.debtAmount = ILoanShifter(protoAddr).getLoanAmount(_loanShift.id1, _loanShift.debtAddr1); } ( uint[8] memory numData, address[8] memory addrData, uint8[3] memory enumData, bytes memory callData ) = _packData(_loanShift, _exchangeData); // encode data bytes memory paramsData = abi.encode(numData, addrData, enumData, callData, address(this)); address payable loanShifterReceiverAddr = payable(shifterRegistry.getAddr("LOAN_SHIFTER_RECEIVER")); loanShifterReceiverAddr.transfer(address(this).balance); // call FL givePermission(loanShifterReceiverAddr); lendingPool.flashLoan(loanShifterReceiverAddr, getLoanAddr(_loanShift.debtAddr1, _loanShift.fromProtocol), _loanShift.debtAmount, paramsData); removePermission(loanShifterReceiverAddr); unsubFromAutomation( _loanShift.unsub, _loanShift.id1, _loanShift.id2, _loanShift.fromProtocol, _loanShift.toProtocol ); logEvent(_exchangeData, _loanShift); } function _forkVault(LoanShiftData memory _loanShift) internal { // Create new Vault to move to if (_loanShift.id2 == 0) { _loanShift.id2 = manager.open(manager.ilks(_loanShift.id1), address(this)); } if (_loanShift.wholeDebt) { manager.shift(_loanShift.id1, _loanShift.id2); } } function _isSameTypeVaults(LoanShiftData memory _loanShift) internal pure returns (bool) { return _loanShift.fromProtocol == Protocols.MCD && _loanShift.toProtocol == Protocols.MCD && _loanShift.addrLoan1 == _loanShift.addrLoan2; } function getNameByProtocol(uint8 _proto) internal pure returns (string memory) { if (_proto == 0) { return "MCD_SHIFTER"; } else if (_proto == 1) { return "COMP_SHIFTER"; } } function getLoanAddr(address _address, Protocols _fromProtocol) internal returns (address) { if (_fromProtocol == Protocols.COMPOUND) { return CTokenInterface(_address).underlying(); } else if (_fromProtocol == Protocols.MCD) { return DAI_ADDRESS; } else { return address(0); } } function logEvent( SaverExchangeCore.ExchangeData memory _exchangeData, LoanShiftData memory _loanShift ) internal { address srcAddr = _exchangeData.srcAddr; address destAddr = _exchangeData.destAddr; uint collAmount = _exchangeData.srcAmount; uint debtAmount = _exchangeData.destAmount; if (_loanShift.swapType == SwapType.NO_SWAP) { srcAddr = _loanShift.addrLoan1; destAddr = _loanShift.debtAddr1; collAmount = _loanShift.collAmount; debtAmount = _loanShift.debtAmount; } DefisaverLogger(DEFISAVER_LOGGER) .Log(address(this), msg.sender, "LoanShifter", abi.encode( _loanShift.fromProtocol, _loanShift.toProtocol, _loanShift.swapType, srcAddr, destAddr, collAmount, debtAmount )); } function unsubFromAutomation(Unsub _unsub, uint _cdp1, uint _cdp2, Protocols _from, Protocols _to) internal { if (_unsub != Unsub.NO_UNSUB) { if (_unsub == Unsub.FIRST_UNSUB || _unsub == Unsub.BOTH_UNSUB) { unsubscribe(_cdp1, _from); } if (_unsub == Unsub.SECOND_UNSUB || _unsub == Unsub.BOTH_UNSUB) { unsubscribe(_cdp2, _to); } } } function unsubscribe(uint _cdpId, Protocols _protocol) internal { if (_cdpId != 0 && _protocol == Protocols.MCD) { IMCDSubscriptions(MCD_SUB_ADDRESS).unsubscribe(_cdpId); } if (_protocol == Protocols.COMPOUND) { ICompoundSubscriptions(COMPOUND_SUB_ADDRESS).unsubscribe(); } } function _packData( LoanShiftData memory _loanShift, SaverExchangeCore.ExchangeData memory exchangeData ) internal pure returns (uint[8] memory numData, address[8] memory addrData, uint8[3] memory enumData, bytes memory callData) { numData = [ _loanShift.collAmount, _loanShift.debtAmount, _loanShift.id1, _loanShift.id2, exchangeData.srcAmount, exchangeData.destAmount, exchangeData.minPrice, exchangeData.price0x ]; addrData = [ _loanShift.addrLoan1, _loanShift.addrLoan2, _loanShift.debtAddr1, _loanShift.debtAddr2, exchangeData.srcAddr, exchangeData.destAddr, exchangeData.exchangeAddr, exchangeData.wrapper ]; enumData = [ uint8(_loanShift.fromProtocol), uint8(_loanShift.toProtocol), uint8(_loanShift.swapType) ]; callData = exchangeData.callData; } } contract CompShifter is CompoundSaverHelper { using SafeERC20 for ERC20; address public constant COMPTROLLER_ADDR = 0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B; function getLoanAmount(uint _cdpId, address _joinAddr) public returns(uint loanAmount) { return getWholeDebt(_cdpId, _joinAddr); } function getWholeDebt(uint _cdpId, address _joinAddr) public returns(uint loanAmount) { return CTokenInterface(_joinAddr).borrowBalanceCurrent(msg.sender); } function close( address _cCollAddr, address _cBorrowAddr, uint _collAmount, uint _debtAmount ) public { address collAddr = getUnderlyingAddr(_cCollAddr); // payback debt paybackDebt(_debtAmount, _cBorrowAddr, getUnderlyingAddr(_cBorrowAddr), tx.origin); require(CTokenInterface(_cCollAddr).redeemUnderlying(_collAmount) == 0); // Send back money to repay FL if (collAddr == ETH_ADDRESS) { msg.sender.transfer(address(this).balance); } else { ERC20(collAddr).safeTransfer(msg.sender, ERC20(collAddr).balanceOf(address(this))); } } function changeDebt( address _cBorrowAddrOld, address _cBorrowAddrNew, uint _debtAmountOld, uint _debtAmountNew ) public { address borrowAddrNew = getUnderlyingAddr(_cBorrowAddrNew); // payback debt in one token paybackDebt(_debtAmountOld, _cBorrowAddrOld, getUnderlyingAddr(_cBorrowAddrOld), tx.origin); // draw debt in another one borrowCompound(_cBorrowAddrNew, _debtAmountNew); // Send back money to repay FL if (borrowAddrNew == ETH_ADDRESS) { msg.sender.transfer(address(this).balance); } else { ERC20(borrowAddrNew).safeTransfer(msg.sender, ERC20(borrowAddrNew).balanceOf(address(this))); } } function open( address _cCollAddr, address _cBorrowAddr, uint _debtAmount ) public { address collAddr = getUnderlyingAddr(_cCollAddr); address borrowAddr = getUnderlyingAddr(_cBorrowAddr); uint collAmount = 0; if (collAddr == ETH_ADDRESS) { collAmount = address(this).balance; } else { collAmount = ERC20(collAddr).balanceOf(address(this)); } depositCompound(collAddr, _cCollAddr, collAmount); // draw debt borrowCompound(_cBorrowAddr, _debtAmount); // Send back money to repay FL if (borrowAddr == ETH_ADDRESS) { msg.sender.transfer(address(this).balance); } else { ERC20(borrowAddr).safeTransfer(msg.sender, ERC20(borrowAddr).balanceOf(address(this))); } } function repayAll(address _cTokenAddr) public { address tokenAddr = getUnderlyingAddr(_cTokenAddr); uint amount = ERC20(tokenAddr).balanceOf(address(this)); if (amount != 0) { paybackDebt(amount, _cTokenAddr, tokenAddr, tx.origin); } } function depositCompound(address _tokenAddr, address _cTokenAddr, uint _amount) internal { approveCToken(_tokenAddr, _cTokenAddr); enterMarket(_cTokenAddr); if (_tokenAddr != ETH_ADDRESS) { require(CTokenInterface(_cTokenAddr).mint(_amount) == 0, "mint error"); } else { CEtherInterface(_cTokenAddr).mint{value: _amount}(); } } function borrowCompound(address _cTokenAddr, uint _amount) internal { enterMarket(_cTokenAddr); require(CTokenInterface(_cTokenAddr).borrow(_amount) == 0); } function enterMarket(address _cTokenAddr) public { address[] memory markets = new address[](1); markets[0] = _cTokenAddr; ComptrollerInterface(COMPTROLLER_ADDR).enterMarkets(markets); } } contract McdShifter is MCDSaverProxy { using SafeERC20 for ERC20; address public constant OPEN_PROXY_ACTIONS = 0x6d0984E80a86f26c0dd564ca0CF74a8E9Da03305; function getLoanAmount(uint _cdpId, address _joinAddr) public view virtual returns(uint loanAmount) { bytes32 ilk = manager.ilks(_cdpId); (, uint rate,,,) = vat.ilks(ilk); (, uint art) = vat.urns(ilk, manager.urns(_cdpId)); uint dai = vat.dai(manager.urns(_cdpId)); uint rad = sub(mul(art, rate), dai); loanAmount = rad / RAY; loanAmount = mul(loanAmount, RAY) < rad ? loanAmount + 1 : loanAmount; } function close( uint _cdpId, address _joinAddr, uint _loanAmount, uint _collateral ) public { address owner = getOwner(manager, _cdpId); bytes32 ilk = manager.ilks(_cdpId); (uint maxColl, ) = getCdpInfo(manager, _cdpId, ilk); // repay dai debt cdp paybackDebt(_cdpId, ilk, _loanAmount, owner); maxColl = _collateral > maxColl ? maxColl : _collateral; // withdraw collateral from cdp drawCollateral(_cdpId, _joinAddr, maxColl); // send back to msg.sender if (isEthJoinAddr(_joinAddr)) { msg.sender.transfer(address(this).balance); } else { ERC20 collToken = ERC20(getCollateralAddr(_joinAddr)); collToken.safeTransfer(msg.sender, collToken.balanceOf(address(this))); } } function open( uint _cdpId, address _joinAddr, uint _debtAmount ) public { uint collAmount = 0; if (isEthJoinAddr(_joinAddr)) { collAmount = address(this).balance; } else { collAmount = ERC20(address(Join(_joinAddr).gem())).balanceOf(address(this)); } if (_cdpId == 0) { openAndWithdraw(collAmount, _debtAmount, address(this), _joinAddr); } else { // add collateral addCollateral(_cdpId, _joinAddr, collAmount); // draw debt drawDai(_cdpId, manager.ilks(_cdpId), _debtAmount); } // transfer to repay FL ERC20(DAI_ADDRESS).transfer(msg.sender, ERC20(DAI_ADDRESS).balanceOf(address(this))); if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } } function openAndWithdraw(uint _collAmount, uint _debtAmount, address _proxy, address _joinAddrTo) internal { bytes32 ilk = Join(_joinAddrTo).ilk(); if (isEthJoinAddr(_joinAddrTo)) { MCDCreateProxyActions(OPEN_PROXY_ACTIONS).openLockETHAndDraw{value: address(this).balance}( address(manager), JUG_ADDRESS, _joinAddrTo, DAI_JOIN_ADDRESS, ilk, _debtAmount, _proxy ); } else { ERC20(getCollateralAddr(_joinAddrTo)).approve(OPEN_PROXY_ACTIONS, uint256(-1)); MCDCreateProxyActions(OPEN_PROXY_ACTIONS).openLockGemAndDraw( address(manager), JUG_ADDRESS, _joinAddrTo, DAI_JOIN_ADDRESS, ilk, _collAmount, _debtAmount, true, _proxy ); } } } contract AaveSaverProxy is GasBurner, SaverExchangeCore, AaveHelper { address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; uint public constant VARIABLE_RATE = 2; function repay(ExchangeData memory _data, uint _gasCost) public payable burnGas(20) { address lendingPoolCore = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); address payable user = payable(getUserAddress()); // redeem collateral address aTokenCollateral = ILendingPool(lendingPoolCore).getReserveATokenAddress(_data.srcAddr); // uint256 maxCollateral = IAToken(aTokenCollateral).balanceOf(address(this)); // don't swap more than maxCollateral // _data.srcAmount = _data.srcAmount > maxCollateral ? maxCollateral : _data.srcAmount; IAToken(aTokenCollateral).redeem(_data.srcAmount); uint256 destAmount = _data.srcAmount; if (_data.srcAddr != _data.destAddr) { // swap (, destAmount) = _sell(_data); destAmount -= getFee(destAmount, user, _gasCost, _data.destAddr); } else { destAmount -= getGasCost(destAmount, user, _gasCost, _data.destAddr); } // payback if (_data.destAddr == ETH_ADDR) { ILendingPool(lendingPool).repay{value: destAmount}(_data.destAddr, destAmount, payable(address(this))); } else { approveToken(_data.destAddr, lendingPoolCore); ILendingPool(lendingPool).repay(_data.destAddr, destAmount, payable(address(this))); } // first return 0x fee to msg.sender as it is the address that actually sent 0x fee sendContractBalance(ETH_ADDR, tx.origin, min(address(this).balance, msg.value)); // send all leftovers from dest addr to proxy owner sendFullContractBalance(_data.destAddr, user); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "AaveRepay", abi.encode(_data.srcAddr, _data.destAddr, _data.srcAmount, destAmount)); } function boost(ExchangeData memory _data, uint _gasCost) public payable burnGas(20) { address lendingPoolCore = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); (,,,uint256 borrowRateMode,,,,,,bool collateralEnabled) = ILendingPool(lendingPool).getUserReserveData(_data.destAddr, address(this)); address payable user = payable(getUserAddress()); // skipping this check as its too expensive // uint256 maxBorrow = getMaxBoost(_data.srcAddr, _data.destAddr, address(this)); // _data.srcAmount = _data.srcAmount > maxBorrow ? maxBorrow : _data.srcAmount; // borrow amount ILendingPool(lendingPool).borrow(_data.srcAddr, _data.srcAmount, borrowRateMode == 0 ? VARIABLE_RATE : borrowRateMode, AAVE_REFERRAL_CODE); uint256 destAmount; if (_data.destAddr != _data.srcAddr) { _data.srcAmount -= getFee(_data.srcAmount, user, _gasCost, _data.srcAddr); // swap (, destAmount) = _sell(_data); } else { _data.srcAmount -= getGasCost(_data.srcAmount, user, _gasCost, _data.srcAddr); destAmount = _data.srcAmount; } if (_data.destAddr == ETH_ADDR) { ILendingPool(lendingPool).deposit{value: destAmount}(_data.destAddr, destAmount, AAVE_REFERRAL_CODE); } else { approveToken(_data.destAddr, lendingPoolCore); ILendingPool(lendingPool).deposit(_data.destAddr, destAmount, AAVE_REFERRAL_CODE); } if (!collateralEnabled) { ILendingPool(lendingPool).setUserUseReserveAsCollateral(_data.destAddr, true); } // returning to msg.sender as it is the address that actually sent 0x fee sendContractBalance(ETH_ADDR, tx.origin, min(address(this).balance, msg.value)); // send all leftovers from dest addr to proxy owner sendFullContractBalance(_data.destAddr, user); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "AaveBoost", abi.encode(_data.srcAddr, _data.destAddr, _data.srcAmount, destAmount)); } } contract AaveSaverReceiver is AaveHelper, AdminAuth, SaverExchangeCore { using SafeERC20 for ERC20; address public constant AAVE_SAVER_PROXY = 0xCab7ce9148499E0dD8228c3c8cDb9B56Ac2bb57a; address public constant AAVE_BASIC_PROXY = 0xd042D4E9B4186c545648c7FfFe87125c976D110B; address public constant AETH_ADDRESS = 0x3a3A65aAb0dd2A17E3F1947bA16138cd37d08c04; function callFunction( address sender, Account.Info memory account, bytes memory data ) public { ( bytes memory exchangeDataBytes, uint256 gasCost, bool isRepay, uint256 ethAmount, uint256 txValue, address user, address proxy ) = abi.decode(data, (bytes,uint256,bool,uint256,uint256,address,address)); // withdraw eth TokenInterface(WETH_ADDRESS).withdraw(ethAmount); address lendingPoolCoreAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); // deposit eth on behalf of proxy DSProxy(payable(proxy)).execute{value: ethAmount}(AAVE_BASIC_PROXY, abi.encodeWithSignature("deposit(address,uint256)", ETH_ADDR, ethAmount)); bytes memory functionData = packFunctionCall(exchangeDataBytes, gasCost, isRepay); DSProxy(payable(proxy)).execute{value: txValue}(AAVE_SAVER_PROXY, functionData); // withdraw deposited eth DSProxy(payable(proxy)).execute(AAVE_BASIC_PROXY, abi.encodeWithSignature("withdraw(address,address,uint256,bool)", ETH_ADDR, AETH_ADDRESS, ethAmount, false)); // deposit eth, get weth and return to sender TokenInterface(WETH_ADDRESS).deposit.value(address(this).balance)(); ERC20(WETH_ADDRESS).safeTransfer(proxy, ethAmount+2); } function packFunctionCall(bytes memory _exchangeDataBytes, uint256 _gasCost, bool _isRepay) internal returns (bytes memory) { ExchangeData memory exData = unpackExchangeData(_exchangeDataBytes); bytes memory functionData; if (_isRepay) { functionData = abi.encodeWithSignature("repay((address,address,uint256,uint256,uint256,address,address,bytes,uint256),uint256)", exData, _gasCost); } else { functionData = abi.encodeWithSignature("boost((address,address,uint256,uint256,uint256,address,address,bytes,uint256),uint256)", exData, _gasCost); } return functionData; } /// @dev if contract receive eth, convert it to WETH receive() external override payable { // deposit eth and get weth if (msg.sender == owner) { TokenInterface(WETH_ADDRESS).deposit.value(address(this).balance)(); } } } contract AaveSaverTaker is DydxFlashLoanBase, ProxyPermission, GasBurner, SaverExchangeCore { address public constant WETH_ADDR = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address payable public constant AAVE_RECEIVER = 0x969DfE84ac318531f13B731c7f21af9918802B94; address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; address public constant PROXY_REGISTRY_ADDRESS = 0x4678f0a6958e4D2Bc4F1BAF7Bc52E8F3564f3fE4; function repay(ExchangeData memory _data, uint256 _gasCost) public payable { _flashLoan(_data, _gasCost, true); } function boost(ExchangeData memory _data, uint256 _gasCost) public payable { _flashLoan(_data, _gasCost, false); } /// @notice Starts the process to move users position 1 collateral and 1 borrow /// @dev User must send 2 wei with this transaction function _flashLoan(ExchangeData memory _data, uint _gasCost, bool _isRepay) internal { ISoloMargin solo = ISoloMargin(SOLO_MARGIN_ADDRESS); uint256 ethAmount = ERC20(WETH_ADDR).balanceOf(SOLO_MARGIN_ADDRESS); // Get marketId from token address uint256 marketId = _getMarketIdFromTokenAddress(WETH_ADDR); // Calculate repay amount (_amount + (2 wei)) // Approve transfer from uint256 repayAmount = _getRepaymentAmountInternal(ethAmount); ERC20(WETH_ADDR).approve(SOLO_MARGIN_ADDRESS, repayAmount); Actions.ActionArgs[] memory operations = new Actions.ActionArgs[](3); operations[0] = _getWithdrawAction(marketId, ethAmount, AAVE_RECEIVER); AAVE_RECEIVER.transfer(msg.value); bytes memory encodedData = packExchangeData(_data); operations[1] = _getCallAction( abi.encode(encodedData, _gasCost, _isRepay, ethAmount, msg.value, proxyOwner(), address(this)), AAVE_RECEIVER ); operations[2] = _getDepositAction(marketId, repayAmount, address(this)); Account.Info[] memory accountInfos = new Account.Info[](1); accountInfos[0] = _getAccountInfo(); givePermission(AAVE_RECEIVER); solo.operate(accountInfos, operations); removePermission(AAVE_RECEIVER); } } contract CompoundLoanInfo is CompoundSafetyRatio { struct LoanData { address user; uint128 ratio; address[] collAddr; address[] borrowAddr; uint[] collAmounts; uint[] borrowAmounts; } struct TokenInfo { address cTokenAddress; address underlyingTokenAddress; uint collateralFactor; uint price; } struct TokenInfoFull { address underlyingTokenAddress; uint supplyRate; uint borrowRate; uint exchangeRate; uint marketLiquidity; uint totalSupply; uint totalBorrow; uint collateralFactor; uint price; } address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant CETH_ADDRESS = 0x4Ddc2D193948926D02f9B1fE9e1daa0718270ED5; /// @notice Calcualted the ratio of coll/debt for a compound user /// @param _user Address of the user function getRatio(address _user) public view returns (uint) { // For each asset the account is in return getSafetyRatio(_user); } /// @notice Fetches Compound prices for tokens /// @param _cTokens Arr. of cTokens for which to get the prices /// @return prices Array of prices function getPrices(address[] memory _cTokens) public view returns (uint[] memory prices) { prices = new uint[](_cTokens.length); address oracleAddr = comp.oracle(); for (uint i = 0; i < _cTokens.length; ++i) { prices[i] = CompoundOracleInterface(oracleAddr).getUnderlyingPrice(_cTokens[i]); } } /// @notice Fetches Compound collateral factors for tokens /// @param _cTokens Arr. of cTokens for which to get the coll. factors /// @return collFactors Array of coll. factors function getCollFactors(address[] memory _cTokens) public view returns (uint[] memory collFactors) { collFactors = new uint[](_cTokens.length); for (uint i = 0; i < _cTokens.length; ++i) { (, collFactors[i]) = comp.markets(_cTokens[i]); } } /// @notice Fetches all the collateral/debt address and amounts, denominated in usd /// @param _user Address of the user /// @return data LoanData information function getLoanData(address _user) public view returns (LoanData memory data) { address[] memory assets = comp.getAssetsIn(_user); address oracleAddr = comp.oracle(); data = LoanData({ user: _user, ratio: 0, collAddr: new address[](assets.length), borrowAddr: new address[](assets.length), collAmounts: new uint[](assets.length), borrowAmounts: new uint[](assets.length) }); uint collPos = 0; uint borrowPos = 0; for (uint i = 0; i < assets.length; i++) { address asset = assets[i]; (, uint cTokenBalance, uint borrowBalance, uint exchangeRateMantissa) = CTokenInterface(asset).getAccountSnapshot(_user); Exp memory oraclePrice; if (cTokenBalance != 0 || borrowBalance != 0) { oraclePrice = Exp({mantissa: CompoundOracleInterface(oracleAddr).getUnderlyingPrice(asset)}); } // Sum up collateral in Usd if (cTokenBalance != 0) { Exp memory exchangeRate = Exp({mantissa: exchangeRateMantissa}); (, Exp memory tokensToUsd) = mulExp(exchangeRate, oraclePrice); data.collAddr[collPos] = asset; (, data.collAmounts[collPos]) = mulScalarTruncate(tokensToUsd, cTokenBalance); collPos++; } // Sum up debt in Usd if (borrowBalance != 0) { data.borrowAddr[borrowPos] = asset; (, data.borrowAmounts[borrowPos]) = mulScalarTruncate(oraclePrice, borrowBalance); borrowPos++; } } data.ratio = uint128(getSafetyRatio(_user)); return data; } function getTokenBalances(address _user, address[] memory _cTokens) public view returns (uint[] memory balances, uint[] memory borrows) { balances = new uint[](_cTokens.length); borrows = new uint[](_cTokens.length); for (uint i = 0; i < _cTokens.length; i++) { address asset = _cTokens[i]; (, uint cTokenBalance, uint borrowBalance, uint exchangeRateMantissa) = CTokenInterface(asset).getAccountSnapshot(_user); Exp memory exchangeRate = Exp({mantissa: exchangeRateMantissa}); (, balances[i]) = mulScalarTruncate(exchangeRate, cTokenBalance); borrows[i] = borrowBalance; } } /// @notice Fetches all the collateral/debt address and amounts, denominated in usd /// @param _users Addresses of the user /// @return loans Array of LoanData information function getLoanDataArr(address[] memory _users) public view returns (LoanData[] memory loans) { loans = new LoanData[](_users.length); for (uint i = 0; i < _users.length; ++i) { loans[i] = getLoanData(_users[i]); } } /// @notice Calcualted the ratio of coll/debt for a compound user /// @param _users Addresses of the user /// @return ratios Array of ratios function getRatios(address[] memory _users) public view returns (uint[] memory ratios) { ratios = new uint[](_users.length); for (uint i = 0; i < _users.length; ++i) { ratios[i] = getSafetyRatio(_users[i]); } } /// @notice Information about cTokens /// @param _cTokenAddresses Array of cTokens addresses /// @return tokens Array of cTokens infomartion function getTokensInfo(address[] memory _cTokenAddresses) public returns(TokenInfo[] memory tokens) { tokens = new TokenInfo[](_cTokenAddresses.length); address oracleAddr = comp.oracle(); for (uint i = 0; i < _cTokenAddresses.length; ++i) { (, uint collFactor) = comp.markets(_cTokenAddresses[i]); tokens[i] = TokenInfo({ cTokenAddress: _cTokenAddresses[i], underlyingTokenAddress: getUnderlyingAddr(_cTokenAddresses[i]), collateralFactor: collFactor, price: CompoundOracleInterface(oracleAddr).getUnderlyingPrice(_cTokenAddresses[i]) }); } } /// @notice Information about cTokens /// @param _cTokenAddresses Array of cTokens addresses /// @return tokens Array of cTokens infomartion function getFullTokensInfo(address[] memory _cTokenAddresses) public returns(TokenInfoFull[] memory tokens) { tokens = new TokenInfoFull[](_cTokenAddresses.length); address oracleAddr = comp.oracle(); for (uint i = 0; i < _cTokenAddresses.length; ++i) { (, uint collFactor) = comp.markets(_cTokenAddresses[i]); CTokenInterface cToken = CTokenInterface(_cTokenAddresses[i]); tokens[i] = TokenInfoFull({ underlyingTokenAddress: getUnderlyingAddr(_cTokenAddresses[i]), supplyRate: cToken.supplyRatePerBlock(), borrowRate: cToken.borrowRatePerBlock(), exchangeRate: cToken.exchangeRateCurrent(), marketLiquidity: cToken.getCash(), totalSupply: cToken.totalSupply(), totalBorrow: cToken.totalBorrowsCurrent(), collateralFactor: collFactor, price: CompoundOracleInterface(oracleAddr).getUnderlyingPrice(_cTokenAddresses[i]) }); } } /// @notice Returns the underlying address of the cToken asset /// @param _cTokenAddress cToken address /// @return Token address of the cToken specified function getUnderlyingAddr(address _cTokenAddress) internal returns (address) { if (_cTokenAddress == CETH_ADDRESS) { return ETH_ADDRESS; } else { return CTokenInterface(_cTokenAddress).underlying(); } } } contract CompLeverage is SaverExchangeCore, CompBalance, CompoundBasicProxy { address public constant C_COMP_ADDR = 0x70e36f6BF80a52b3B46b3aF8e106CC0ed743E8e4; address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant CETH_ADDRESS = 0x4Ddc2D193948926D02f9B1fE9e1daa0718270ED5; address payable public constant WALLET_ADDR = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; address public constant DISCOUNT_ADDR = 0x1b14E8D511c9A4395425314f849bD737BAF8208F; address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); /// @notice Should claim COMP and sell it to the specified token and deposit it back /// @param exchangeData Standard Exchange struct /// @param _cTokensSupply List of cTokens user is supplying /// @param _cTokensBorrow List of cTokens user is borrowing /// @param _cDepositAddr The cToken address of the asset you want to deposit /// @param _inMarket Flag if the cToken is used as collateral function claimAndSell( ExchangeData memory exchangeData, address[] memory _cTokensSupply, address[] memory _cTokensBorrow, address _cDepositAddr, bool _inMarket ) public payable { // Claim COMP token _claim(address(this), _cTokensSupply, _cTokensBorrow); uint compBalance = ERC20(COMP_ADDR).balanceOf(address(this)); uint depositAmount = 0; // Exchange COMP if (exchangeData.srcAddr != address(0)) { exchangeData.srcAmount -= getFee(compBalance, COMP_ADDR, address(this)); (, depositAmount) = _sell(exchangeData); // if we have no deposit after, send back tokens to the user if (_cDepositAddr == address(0)) { ERC20(exchangeData.destAddr).transfer(msg.sender, depositAmount); } } // Deposit back a token if (_cDepositAddr != address(0)) { // if we are just depositing COMP without a swap if (_cDepositAddr == C_COMP_ADDR) { depositAmount = compBalance; } address tokenAddr = getUnderlyingAddr(_cDepositAddr); deposit(tokenAddr, _cDepositAddr, depositAmount, _inMarket); } logger.Log(address(this), msg.sender, "CompLeverage", abi.encode(compBalance, depositAmount, _cDepositAddr, exchangeData.destAmount)); } function getUnderlyingAddr(address _cTokenAddress) internal returns (address) { if (_cTokenAddress == CETH_ADDRESS) { return ETH_ADDRESS; } else { return CTokenInterface(_cTokenAddress).underlying(); } } function getFee(uint _amount, address _tokenAddr, address _proxy) internal returns (uint feeAmount) { uint fee = 400; DSProxyInterface proxy = DSProxyInterface(payable(_proxy)); address user = proxy.owner(); if (Discount(DISCOUNT_ADDR).isCustomFeeSet(user)) { fee = Discount(DISCOUNT_ADDR).getCustomServiceFee(user); } feeAmount = (fee == 0) ? 0 : (_amount / fee); // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } if (_tokenAddr == ETH_ADDRESS) { WALLET_ADDR.transfer(feeAmount); } else { ERC20(_tokenAddr).safeTransfer(WALLET_ADDR, feeAmount); } } } contract CompoundCreateReceiver is FlashLoanReceiverBase, SaverExchangeCore { ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); ShifterRegistry public constant shifterRegistry = ShifterRegistry(0x2E82103bD91053C781aaF39da17aE58ceE39d0ab); address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address payable public constant WALLET_ADDR = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; address public constant DISCOUNT_ADDR = 0x1b14E8D511c9A4395425314f849bD737BAF8208F; // solhint-disable-next-line no-empty-blocks constructor() public FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) {} struct CompCreateData { address payable proxyAddr; bytes proxyData; address cCollAddr; address cDebtAddr; } /// @notice Called by Aave when sending back the FL amount /// @param _reserve The address of the borrowed token /// @param _amount Amount of FL tokens received /// @param _fee FL Aave fee /// @param _params The params that are sent from the original FL caller contract function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { // Format the call data for DSProxy (CompCreateData memory compCreate, ExchangeData memory exchangeData) = packFunctionCall(_amount, _fee, _params); address leveragedAsset = _reserve; // If the assets are different if (compCreate.cCollAddr != compCreate.cDebtAddr) { (, uint sellAmount) = _sell(exchangeData); getFee(sellAmount, exchangeData.destAddr, compCreate.proxyAddr); leveragedAsset = exchangeData.destAddr; } // Send amount to DSProxy sendToProxy(compCreate.proxyAddr, leveragedAsset); address compOpenProxy = shifterRegistry.getAddr("COMP_SHIFTER"); // Execute the DSProxy call DSProxyInterface(compCreate.proxyAddr).execute(compOpenProxy, compCreate.proxyData); // Repay the loan with the money DSProxy sent back transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { // solhint-disable-next-line avoid-tx-origin tx.origin.transfer(address(this).balance); } } /// @notice Formats function data call so we can call it through DSProxy /// @param _amount Amount of FL /// @param _fee Fee of the FL /// @param _params Saver proxy params function packFunctionCall(uint _amount, uint _fee, bytes memory _params) internal pure returns (CompCreateData memory compCreate, ExchangeData memory exchangeData) { ( uint[4] memory numData, // srcAmount, destAmount, minPrice, price0x address[6] memory cAddresses, // cCollAddr, cDebtAddr, srcAddr, destAddr, exchangeAddr, wrapper bytes memory callData, address proxy ) = abi.decode(_params, (uint256[4],address[6],bytes,address)); bytes memory proxyData = abi.encodeWithSignature( "open(address,address,uint256)", cAddresses[0], cAddresses[1], (_amount + _fee)); exchangeData = SaverExchangeCore.ExchangeData({ srcAddr: cAddresses[2], destAddr: cAddresses[3], srcAmount: numData[0], destAmount: numData[1], minPrice: numData[2], wrapper: cAddresses[5], exchangeAddr: cAddresses[4], callData: callData, price0x: numData[3] }); compCreate = CompCreateData({ proxyAddr: payable(proxy), proxyData: proxyData, cCollAddr: cAddresses[0], cDebtAddr: cAddresses[1] }); return (compCreate, exchangeData); } /// @notice Send the FL funds received to DSProxy /// @param _proxy DSProxy address /// @param _reserve Token address function sendToProxy(address payable _proxy, address _reserve) internal { if (_reserve != ETH_ADDRESS) { ERC20(_reserve).safeTransfer(_proxy, ERC20(_reserve).balanceOf(address(this))); } else { _proxy.transfer(address(this).balance); } } function getFee(uint _amount, address _tokenAddr, address _proxy) internal returns (uint feeAmount) { uint fee = 400; DSProxy proxy = DSProxy(payable(_proxy)); address user = proxy.owner(); if (Discount(DISCOUNT_ADDR).isCustomFeeSet(user)) { fee = Discount(DISCOUNT_ADDR).getCustomServiceFee(user); } feeAmount = (fee == 0) ? 0 : (_amount / fee); // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } if (_tokenAddr == ETH_ADDRESS) { WALLET_ADDR.transfer(feeAmount); } else { ERC20(_tokenAddr).safeTransfer(WALLET_ADDR, feeAmount); } } // solhint-disable-next-line no-empty-blocks receive() external override(FlashLoanReceiverBase, SaverExchangeCore) payable {} } contract CompoundSaverFlashLoan is FlashLoanReceiverBase, SaverExchangeCore { ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); address payable public COMPOUND_SAVER_FLASH_PROXY = 0xcEAb38B5C88F33Dabe4D31BDD384E08215526632; address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public owner; using SafeERC20 for ERC20; constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public { owner = msg.sender; } /// @notice Called by Aave when sending back the FL amount /// @param _reserve The address of the borrowed token /// @param _amount Amount of FL tokens received /// @param _fee FL Aave fee /// @param _params The params that are sent from the original FL caller contract function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { // Format the call data for DSProxy (bytes memory proxyData, address payable proxyAddr) = packFunctionCall(_amount, _fee, _params); // Send Flash loan amount to DSProxy sendLoanToProxy(proxyAddr, _reserve, _amount); // Execute the DSProxy call DSProxyInterface(proxyAddr).execute(COMPOUND_SAVER_FLASH_PROXY, proxyData); // Repay the loan with the money DSProxy sent back transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } } /// @notice Formats function data call so we can call it through DSProxy /// @param _amount Amount of FL /// @param _fee Fee of the FL /// @param _params Saver proxy params /// @return proxyData Formated function call data function packFunctionCall(uint _amount, uint _fee, bytes memory _params) internal pure returns (bytes memory proxyData, address payable) { ( bytes memory exDataBytes, address[2] memory cAddresses, // cCollAddress, cBorrowAddress uint256 gasCost, bool isRepay, address payable proxyAddr ) = abi.decode(_params, (bytes,address[2],uint256,bool,address)); ExchangeData memory _exData = unpackExchangeData(exDataBytes); uint[2] memory flashLoanData = [_amount, _fee]; if (isRepay) { proxyData = abi.encodeWithSignature("flashRepay((address,address,uint256,uint256,uint256,address,address,bytes,uint256),address[2],uint256,uint256[2])", _exData, cAddresses, gasCost, flashLoanData); } else { proxyData = abi.encodeWithSignature("flashBoost((address,address,uint256,uint256,uint256,address,address,bytes,uint256),address[2],uint256,uint256[2])", _exData, cAddresses, gasCost, flashLoanData); } return (proxyData, proxyAddr); } /// @notice Send the FL funds received to DSProxy /// @param _proxy DSProxy address /// @param _reserve Token address /// @param _amount Amount of tokens function sendLoanToProxy(address payable _proxy, address _reserve, uint _amount) internal { if (_reserve != ETH_ADDRESS) { ERC20(_reserve).safeTransfer(_proxy, _amount); } _proxy.transfer(address(this).balance); } receive() external override(SaverExchangeCore, FlashLoanReceiverBase) payable {} } contract CompoundSaverFlashProxy is SaverExchangeCore, CompoundSaverHelper { address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; using SafeERC20 for ERC20; /// @notice Repays the position and sends tokens back for FL /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress] /// @param _gasCost Gas cost for transaction /// @param _flashLoanData Data about FL [amount, fee] function flashRepay( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost, uint[2] memory _flashLoanData // amount, fee ) public payable { enterMarket(_cAddresses[0], _cAddresses[1]); address payable user = payable(getUserAddress()); uint flashBorrowed = _flashLoanData[0] + _flashLoanData[1]; uint maxColl = getMaxCollateral(_cAddresses[0], address(this)); // draw max coll require(CTokenInterface(_cAddresses[0]).redeemUnderlying(maxColl) == 0); address collToken = getUnderlyingAddr(_cAddresses[0]); address borrowToken = getUnderlyingAddr(_cAddresses[1]); uint swapAmount = 0; if (collToken != borrowToken) { // swap max coll + loanAmount _exData.srcAmount = maxColl + _flashLoanData[0]; (,swapAmount) = _sell(_exData); // get fee swapAmount -= getFee(swapAmount, user, _gasCost, _cAddresses[1]); } else { swapAmount = (maxColl + _flashLoanData[0]); swapAmount -= getGasCost(swapAmount, _gasCost, _cAddresses[1]); } // payback debt paybackDebt(swapAmount, _cAddresses[1], borrowToken, user); // draw collateral for loanAmount + loanFee require(CTokenInterface(_cAddresses[0]).redeemUnderlying(flashBorrowed) == 0); // repay flash loan returnFlashLoan(collToken, flashBorrowed); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "CompoundRepay", abi.encode(_exData.srcAmount, swapAmount, collToken, borrowToken)); } /// @notice Boosts the position and sends tokens back for FL /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress] /// @param _gasCost Gas cost for specific transaction /// @param _flashLoanData Data about FL [amount, fee] function flashBoost( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost, uint[2] memory _flashLoanData // amount, fee ) public payable { enterMarket(_cAddresses[0], _cAddresses[1]); address payable user = payable(getUserAddress()); uint flashBorrowed = _flashLoanData[0] + _flashLoanData[1]; // borrow max amount uint borrowAmount = getMaxBorrow(_cAddresses[1], address(this)); require(CTokenInterface(_cAddresses[1]).borrow(borrowAmount) == 0); address collToken = getUnderlyingAddr(_cAddresses[0]); address borrowToken = getUnderlyingAddr(_cAddresses[1]); uint swapAmount = 0; if (collToken != borrowToken) { // get dfs fee borrowAmount -= getFee((borrowAmount + _flashLoanData[0]), user, _gasCost, _cAddresses[1]); _exData.srcAmount = (borrowAmount + _flashLoanData[0]); (,swapAmount) = _sell(_exData); } else { swapAmount = (borrowAmount + _flashLoanData[0]); swapAmount -= getGasCost(swapAmount, _gasCost, _cAddresses[1]); } // deposit swaped collateral depositCollateral(collToken, _cAddresses[0], swapAmount); // borrow token to repay flash loan require(CTokenInterface(_cAddresses[1]).borrow(flashBorrowed) == 0); // repay flash loan returnFlashLoan(borrowToken, flashBorrowed); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "CompoundBoost", abi.encode(_exData.srcAmount, swapAmount, collToken, borrowToken)); } /// @notice Helper method to deposit tokens in Compound /// @param _collToken Token address of the collateral /// @param _cCollToken CToken address of the collateral /// @param _depositAmount Amount to deposit function depositCollateral(address _collToken, address _cCollToken, uint _depositAmount) internal { approveCToken(_collToken, _cCollToken); if (_collToken != ETH_ADDRESS) { require(CTokenInterface(_cCollToken).mint(_depositAmount) == 0); } else { CEtherInterface(_cCollToken).mint{value: _depositAmount}(); // reverts on fail } } /// @notice Returns the tokens/ether to the msg.sender which is the FL contract /// @param _tokenAddr Address of token which we return /// @param _amount Amount to return function returnFlashLoan(address _tokenAddr, uint _amount) internal { if (_tokenAddr != ETH_ADDRESS) { ERC20(_tokenAddr).safeTransfer(msg.sender, _amount); } msg.sender.transfer(address(this).balance); } } contract CompoundSaverProxy is CompoundSaverHelper, SaverExchangeCore { DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); /// @notice Withdraws collateral, converts to borrowed token and repays debt /// @dev Called through the DSProxy /// @param _exData Exchange data /// @param _cAddresses Coll/Debt addresses [cCollAddress, cBorrowAddress] /// @param _gasCost Gas cost for specific transaction function repay( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost ) public payable { enterMarket(_cAddresses[0], _cAddresses[1]); address payable user = payable(getUserAddress()); uint maxColl = getMaxCollateral(_cAddresses[0], address(this)); uint collAmount = (_exData.srcAmount > maxColl) ? maxColl : _exData.srcAmount; require(CTokenInterface(_cAddresses[0]).redeemUnderlying(collAmount) == 0); address collToken = getUnderlyingAddr(_cAddresses[0]); address borrowToken = getUnderlyingAddr(_cAddresses[1]); uint swapAmount = 0; if (collToken != borrowToken) { _exData.srcAmount = collAmount; (, swapAmount) = _sell(_exData); swapAmount -= getFee(swapAmount, user, _gasCost, _cAddresses[1]); } else { swapAmount = collAmount; swapAmount -= getGasCost(swapAmount, _gasCost, _cAddresses[1]); } paybackDebt(swapAmount, _cAddresses[1], borrowToken, user); // handle 0x fee tx.origin.transfer(address(this).balance); // log amount, collToken, borrowToken logger.Log(address(this), msg.sender, "CompoundRepay", abi.encode(_exData.srcAmount, swapAmount, collToken, borrowToken)); } /// @notice Borrows token, converts to collateral, and adds to position /// @dev Called through the DSProxy /// @param _exData Exchange data /// @param _cAddresses Coll/Debt addresses [cCollAddress, cBorrowAddress] /// @param _gasCost Gas cost for specific transaction function boost( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost ) public payable { enterMarket(_cAddresses[0], _cAddresses[1]); address payable user = payable(getUserAddress()); uint maxBorrow = getMaxBorrow(_cAddresses[1], address(this)); uint borrowAmount = (_exData.srcAmount > maxBorrow) ? maxBorrow : _exData.srcAmount; require(CTokenInterface(_cAddresses[1]).borrow(borrowAmount) == 0); address collToken = getUnderlyingAddr(_cAddresses[0]); address borrowToken = getUnderlyingAddr(_cAddresses[1]); uint swapAmount = 0; if (collToken != borrowToken) { borrowAmount -= getFee(borrowAmount, user, _gasCost, _cAddresses[1]); _exData.srcAmount = borrowAmount; (,swapAmount) = _sell(_exData); } else { swapAmount = borrowAmount; swapAmount -= getGasCost(swapAmount, _gasCost, _cAddresses[1]); } approveCToken(collToken, _cAddresses[0]); if (collToken != ETH_ADDRESS) { require(CTokenInterface(_cAddresses[0]).mint(swapAmount) == 0); } else { CEtherInterface(_cAddresses[0]).mint{value: swapAmount}(); // reverts on fail } // handle 0x fee tx.origin.transfer(address(this).balance); // log amount, collToken, borrowToken logger.Log(address(this), msg.sender, "CompoundBoost", abi.encode(_exData.srcAmount, swapAmount, collToken, borrowToken)); } } contract CreamSaverFlashLoan is FlashLoanReceiverBase, SaverExchangeCore { ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); address payable public COMPOUND_SAVER_FLASH_PROXY = 0x1e012554891d271eDc80ba8eB146EA5FF596fA51; address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public owner; using SafeERC20 for ERC20; constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public { owner = msg.sender; } /// @notice Called by Aave when sending back the FL amount /// @param _reserve The address of the borrowed token /// @param _amount Amount of FL tokens received /// @param _fee FL Aave fee /// @param _params The params that are sent from the original FL caller contract function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { // Format the call data for DSProxy (bytes memory proxyData, address payable proxyAddr) = packFunctionCall(_amount, _fee, _params); // Send Flash loan amount to DSProxy sendLoanToProxy(proxyAddr, _reserve, _amount); // Execute the DSProxy call DSProxyInterface(proxyAddr).execute(COMPOUND_SAVER_FLASH_PROXY, proxyData); // Repay the loan with the money DSProxy sent back transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } } /// @notice Formats function data call so we can call it through DSProxy /// @param _amount Amount of FL /// @param _fee Fee of the FL /// @param _params Saver proxy params /// @return proxyData Formated function call data function packFunctionCall(uint _amount, uint _fee, bytes memory _params) internal pure returns (bytes memory proxyData, address payable) { ( bytes memory exDataBytes, address[2] memory cAddresses, // cCollAddress, cBorrowAddress uint256 gasCost, bool isRepay, address payable proxyAddr ) = abi.decode(_params, (bytes,address[2],uint256,bool,address)); ExchangeData memory _exData = unpackExchangeData(exDataBytes); uint[2] memory flashLoanData = [_amount, _fee]; if (isRepay) { proxyData = abi.encodeWithSignature("flashRepay((address,address,uint256,uint256,uint256,address,address,bytes,uint256),address[2],uint256,uint256[2])", _exData, cAddresses, gasCost, flashLoanData); } else { proxyData = abi.encodeWithSignature("flashBoost((address,address,uint256,uint256,uint256,address,address,bytes,uint256),address[2],uint256,uint256[2])", _exData, cAddresses, gasCost, flashLoanData); } return (proxyData, proxyAddr); } /// @notice Send the FL funds received to DSProxy /// @param _proxy DSProxy address /// @param _reserve Token address /// @param _amount Amount of tokens function sendLoanToProxy(address payable _proxy, address _reserve, uint _amount) internal { if (_reserve != ETH_ADDRESS) { ERC20(_reserve).safeTransfer(_proxy, _amount); } _proxy.transfer(address(this).balance); } receive() external override(SaverExchangeCore, FlashLoanReceiverBase) payable {} } contract CreamSaverFlashProxy is SaverExchangeCore, CreamSaverHelper { address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; using SafeERC20 for ERC20; /// @notice Repays the position and sends tokens back for FL /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress] /// @param _gasCost Gas cost for transaction /// @param _flashLoanData Data about FL [amount, fee] function flashRepay( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost, uint[2] memory _flashLoanData // amount, fee ) public payable { enterMarket(_cAddresses[0], _cAddresses[1]); address payable user = payable(getUserAddress()); uint flashBorrowed = _flashLoanData[0] + _flashLoanData[1]; uint maxColl = getMaxCollateral(_cAddresses[0], address(this)); // draw max coll require(CTokenInterface(_cAddresses[0]).redeemUnderlying(maxColl) == 0); address collToken = getUnderlyingAddr(_cAddresses[0]); address borrowToken = getUnderlyingAddr(_cAddresses[1]); uint swapAmount = 0; if (collToken != borrowToken) { // swap max coll + loanAmount _exData.srcAmount = maxColl + _flashLoanData[0]; (,swapAmount) = _sell(_exData); // get fee swapAmount -= getFee(swapAmount, user, _gasCost, _cAddresses[1]); } else { swapAmount = (maxColl + _flashLoanData[0]); swapAmount -= getGasCost(swapAmount, _gasCost, _cAddresses[1]); } // payback debt paybackDebt(swapAmount, _cAddresses[1], borrowToken, user); // draw collateral for loanAmount + loanFee require(CTokenInterface(_cAddresses[0]).redeemUnderlying(flashBorrowed) == 0); // repay flash loan returnFlashLoan(collToken, flashBorrowed); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "CreamRepay", abi.encode(_exData.srcAmount, swapAmount, collToken, borrowToken)); } /// @notice Boosts the position and sends tokens back for FL /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress] /// @param _gasCost Gas cost for specific transaction /// @param _flashLoanData Data about FL [amount, fee] function flashBoost( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost, uint[2] memory _flashLoanData // amount, fee ) public payable { enterMarket(_cAddresses[0], _cAddresses[1]); address payable user = payable(getUserAddress()); uint flashBorrowed = _flashLoanData[0] + _flashLoanData[1]; // borrow max amount uint borrowAmount = getMaxBorrow(_cAddresses[1], address(this)); require(CTokenInterface(_cAddresses[1]).borrow(borrowAmount) == 0); address collToken = getUnderlyingAddr(_cAddresses[0]); address borrowToken = getUnderlyingAddr(_cAddresses[1]); uint swapAmount = 0; if (collToken != borrowToken) { // get dfs fee borrowAmount -= getFee((borrowAmount + _flashLoanData[0]), user, _gasCost, _cAddresses[1]); _exData.srcAmount = (borrowAmount + _flashLoanData[0]); (,swapAmount) = _sell(_exData); } else { swapAmount = (borrowAmount + _flashLoanData[0]); swapAmount -= getGasCost(swapAmount, _gasCost, _cAddresses[1]); } // deposit swaped collateral depositCollateral(collToken, _cAddresses[0], swapAmount); // borrow token to repay flash loan require(CTokenInterface(_cAddresses[1]).borrow(flashBorrowed) == 0); // repay flash loan returnFlashLoan(borrowToken, flashBorrowed); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "CreamBoost", abi.encode(_exData.srcAmount, swapAmount, collToken, borrowToken)); } /// @notice Helper method to deposit tokens in Compound /// @param _collToken Token address of the collateral /// @param _cCollToken CToken address of the collateral /// @param _depositAmount Amount to deposit function depositCollateral(address _collToken, address _cCollToken, uint _depositAmount) internal { approveCToken(_collToken, _cCollToken); if (_collToken != ETH_ADDRESS) { require(CTokenInterface(_cCollToken).mint(_depositAmount) == 0); } else { CEtherInterface(_cCollToken).mint{value: _depositAmount}(); // reverts on fail } } /// @notice Returns the tokens/ether to the msg.sender which is the FL contract /// @param _tokenAddr Address of token which we return /// @param _amount Amount to return function returnFlashLoan(address _tokenAddr, uint _amount) internal { if (_tokenAddr != ETH_ADDRESS) { ERC20(_tokenAddr).safeTransfer(msg.sender, _amount); } msg.sender.transfer(address(this).balance); } } contract CreamSaverProxy is CreamSaverHelper, SaverExchangeCore { DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); /// @notice Withdraws collateral, converts to borrowed token and repays debt /// @dev Called through the DSProxy /// @param _exData Exchange data /// @param _cAddresses Coll/Debt addresses [cCollAddress, cBorrowAddress] /// @param _gasCost Gas cost for specific transaction function repay( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost ) public payable { enterMarket(_cAddresses[0], _cAddresses[1]); address payable user = payable(getUserAddress()); uint maxColl = getMaxCollateral(_cAddresses[0], address(this)); uint collAmount = (_exData.srcAmount > maxColl) ? maxColl : _exData.srcAmount; require(CTokenInterface(_cAddresses[0]).redeemUnderlying(collAmount) == 0); address collToken = getUnderlyingAddr(_cAddresses[0]); address borrowToken = getUnderlyingAddr(_cAddresses[1]); uint swapAmount = 0; if (collToken != borrowToken) { (, swapAmount) = _sell(_exData); swapAmount -= getFee(swapAmount, user, _gasCost, _cAddresses[1]); } else { swapAmount = collAmount; swapAmount -= getGasCost(swapAmount, _gasCost, _cAddresses[1]); } paybackDebt(swapAmount, _cAddresses[1], borrowToken, user); // handle 0x fee tx.origin.transfer(address(this).balance); // log amount, collToken, borrowToken logger.Log(address(this), msg.sender, "CreamRepay", abi.encode(_exData.srcAmount, swapAmount, collToken, borrowToken)); } /// @notice Borrows token, converts to collateral, and adds to position /// @dev Called through the DSProxy /// @param _exData Exchange data /// @param _cAddresses Coll/Debt addresses [cCollAddress, cBorrowAddress] /// @param _gasCost Gas cost for specific transaction function boost( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost ) public payable { enterMarket(_cAddresses[0], _cAddresses[1]); address payable user = payable(getUserAddress()); uint maxBorrow = getMaxBorrow(_cAddresses[1], address(this)); uint borrowAmount = (_exData.srcAmount > maxBorrow) ? maxBorrow : _exData.srcAmount; require(CTokenInterface(_cAddresses[1]).borrow(borrowAmount) == 0); address collToken = getUnderlyingAddr(_cAddresses[0]); address borrowToken = getUnderlyingAddr(_cAddresses[1]); uint swapAmount = 0; if (collToken != borrowToken) { borrowAmount -= getFee(borrowAmount, user, _gasCost, _cAddresses[1]); _exData.srcAmount = borrowAmount; (,swapAmount) = _sell(_exData); } else { swapAmount = borrowAmount; swapAmount -= getGasCost(swapAmount, _gasCost, _cAddresses[1]); } approveCToken(collToken, _cAddresses[0]); if (collToken != ETH_ADDRESS) { require(CTokenInterface(_cAddresses[0]).mint(swapAmount) == 0); } else { CEtherInterface(_cAddresses[0]).mint{value: swapAmount}(); // reverts on fail } // handle 0x fee tx.origin.transfer(address(this).balance); // log amount, collToken, borrowToken logger.Log(address(this), msg.sender, "CreamBoost", abi.encode(_exData.srcAmount, swapAmount, collToken, borrowToken)); } } contract SaverExchange is SaverExchangeCore, AdminAuth, GasBurner { using SafeERC20 for ERC20; uint256 public constant SERVICE_FEE = 800; // 0.125% Fee // solhint-disable-next-line const-name-snakecase DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); uint public burnAmount = 10; /// @notice Takes a src amount of tokens and converts it into the dest token /// @dev Takes fee from the _srcAmount before the exchange /// @param exData [srcAddr, destAddr, srcAmount, destAmount, minPrice, exchangeType, exchangeAddr, callData, price0x] /// @param _user User address who called the exchange function sell(ExchangeData memory exData, address payable _user) public payable burnGas(burnAmount) { // take fee uint dfsFee = getFee(exData.srcAmount, exData.srcAddr); exData.srcAmount = sub(exData.srcAmount, dfsFee); // Perform the exchange (address wrapper, uint destAmount) = _sell(exData); // send back any leftover ether or tokens sendLeftover(exData.srcAddr, exData.destAddr, _user); // log the event logger.Log(address(this), msg.sender, "ExchangeSell", abi.encode(wrapper, exData.srcAddr, exData.destAddr, exData.srcAmount, destAmount)); } /// @notice Takes a dest amount of tokens and converts it from the src token /// @dev Send always more than needed for the swap, extra will be returned /// @param exData [srcAddr, destAddr, srcAmount, destAmount, minPrice, exchangeType, exchangeAddr, callData, price0x] /// @param _user User address who called the exchange function buy(ExchangeData memory exData, address payable _user) public payable burnGas(burnAmount){ uint dfsFee = getFee(exData.srcAmount, exData.srcAddr); exData.srcAmount = sub(exData.srcAmount, dfsFee); // Perform the exchange (address wrapper, uint srcAmount) = _buy(exData); // send back any leftover ether or tokens sendLeftover(exData.srcAddr, exData.destAddr, _user); // log the event logger.Log(address(this), msg.sender, "ExchangeBuy", abi.encode(wrapper, exData.srcAddr, exData.destAddr, srcAmount, exData.destAmount)); } /// @notice Takes a feePercentage and sends it to wallet /// @param _amount Dai amount of the whole trade /// @param _token Address of the token /// @return feeAmount Amount in Dai owner earned on the fee function getFee(uint256 _amount, address _token) internal returns (uint256 feeAmount) { uint256 fee = SERVICE_FEE; if (Discount(DISCOUNT_ADDRESS).isCustomFeeSet(msg.sender)) { fee = Discount(DISCOUNT_ADDRESS).getCustomServiceFee(msg.sender); } if (fee == 0) { feeAmount = 0; } else { feeAmount = _amount / fee; if (_token == KYBER_ETH_ADDRESS) { WALLET_ID.transfer(feeAmount); } else { ERC20(_token).safeTransfer(WALLET_ID, feeAmount); } } } /// @notice Changes the amount of gas token we burn for each call /// @dev Only callable by the owner /// @param _newBurnAmount New amount of gas tokens to be burned function changeBurnAmount(uint _newBurnAmount) public { require(owner == msg.sender); burnAmount = _newBurnAmount; } } contract DFSExchange is DFSExchangeCore, AdminAuth, GasBurner { using SafeERC20 for ERC20; uint256 public constant SERVICE_FEE = 800; // 0.125% Fee // solhint-disable-next-line const-name-snakecase DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); uint public burnAmount = 10; /// @notice Takes a src amount of tokens and converts it into the dest token /// @dev Takes fee from the _srcAmount before the exchange /// @param exData [srcAddr, destAddr, srcAmount, destAmount, minPrice, exchangeType, exchangeAddr, callData, price0x] /// @param _user User address who called the exchange function sell(ExchangeData memory exData, address payable _user) public payable burnGas(burnAmount) { exData.dfsFeeDivider = SERVICE_FEE; // Perform the exchange (address wrapper, uint destAmount) = _sell(exData); // send back any leftover ether or tokens sendLeftover(exData.srcAddr, exData.destAddr, _user); // log the event logger.Log(address(this), msg.sender, "ExchangeSell", abi.encode(wrapper, exData.srcAddr, exData.destAddr, exData.srcAmount, destAmount)); } /// @notice Takes a dest amount of tokens and converts it from the src token /// @dev Send always more than needed for the swap, extra will be returned /// @param exData [srcAddr, destAddr, srcAmount, destAmount, minPrice, exchangeType, exchangeAddr, callData, price0x] /// @param _user User address who called the exchange function buy(ExchangeData memory exData, address payable _user) public payable burnGas(burnAmount){ exData.dfsFeeDivider = SERVICE_FEE; // Perform the exchange (address wrapper, uint srcAmount) = _buy(exData); // send back any leftover ether or tokens sendLeftover(exData.srcAddr, exData.destAddr, _user); // log the event logger.Log(address(this), msg.sender, "ExchangeBuy", abi.encode(wrapper, exData.srcAddr, exData.destAddr, srcAmount, exData.destAmount)); } /// @notice Changes the amount of gas token we burn for each call /// @dev Only callable by the owner /// @param _newBurnAmount New amount of gas tokens to be burned function changeBurnAmount(uint _newBurnAmount) public { require(owner == msg.sender); burnAmount = _newBurnAmount; } } contract MCDSaverFlashLoan is MCDSaverProxy, AdminAuth, FlashLoanReceiverBase { ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public {} struct SaverData { uint cdpId; uint gasCost; uint loanAmount; uint fee; address joinAddr; } function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { //check the contract has the specified balance require(_amount <= getBalanceInternal(address(this), _reserve), "Invalid balance for the contract"); ( bytes memory exDataBytes, uint cdpId, uint gasCost, address joinAddr, bool isRepay ) = abi.decode(_params, (bytes,uint256,uint256,address,bool)); ExchangeData memory exchangeData = unpackExchangeData(exDataBytes); SaverData memory saverData = SaverData({ cdpId: cdpId, gasCost: gasCost, loanAmount: _amount, fee: _fee, joinAddr: joinAddr }); if (isRepay) { repayWithLoan(exchangeData, saverData); } else { boostWithLoan(exchangeData, saverData); } transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } } function boostWithLoan( ExchangeData memory _exchangeData, SaverData memory _saverData ) internal { address user = getOwner(manager, _saverData.cdpId); // Draw users Dai uint maxDebt = getMaxDebt(_saverData.cdpId, manager.ilks(_saverData.cdpId)); uint daiDrawn = drawDai(_saverData.cdpId, manager.ilks(_saverData.cdpId), maxDebt); // Calc. fees uint dsfFee = getFee((daiDrawn + _saverData.loanAmount), _saverData.gasCost, user); uint afterFee = (daiDrawn + _saverData.loanAmount) - dsfFee; // Swap _exchangeData.srcAmount = afterFee; (, uint swapedAmount) = _sell(_exchangeData); // Return collateral addCollateral(_saverData.cdpId, _saverData.joinAddr, swapedAmount); // Draw Dai to repay the flash loan drawDai(_saverData.cdpId, manager.ilks(_saverData.cdpId), (_saverData.loanAmount + _saverData.fee)); logger.Log(address(this), msg.sender, "MCDFlashBoost", abi.encode(_saverData.cdpId, owner, _exchangeData.srcAmount, swapedAmount)); } function repayWithLoan( ExchangeData memory _exchangeData, SaverData memory _saverData ) internal { address user = getOwner(manager, _saverData.cdpId); bytes32 ilk = manager.ilks(_saverData.cdpId); // Draw collateral uint maxColl = getMaxCollateral(_saverData.cdpId, ilk, _saverData.joinAddr); uint collDrawn = drawCollateral(_saverData.cdpId, _saverData.joinAddr, maxColl); // Swap _exchangeData.srcAmount = (_saverData.loanAmount + collDrawn); (, uint swapedAmount) = _sell(_exchangeData); uint paybackAmount = (swapedAmount - getFee(swapedAmount, _saverData.gasCost, user)); paybackAmount = limitLoanAmount(_saverData.cdpId, ilk, paybackAmount, user); // Payback the debt paybackDebt(_saverData.cdpId, ilk, paybackAmount, user); // Draw collateral to repay the flash loan drawCollateral(_saverData.cdpId, _saverData.joinAddr, (_saverData.loanAmount + _saverData.fee)); logger.Log(address(this), msg.sender, "MCDFlashRepay", abi.encode(_saverData.cdpId, owner, _exchangeData.srcAmount, swapedAmount)); } /// @notice Handles that the amount is not bigger than cdp debt and not dust function limitLoanAmount(uint _cdpId, bytes32 _ilk, uint _paybackAmount, address _owner) internal returns (uint256) { uint debt = getAllDebt(address(vat), manager.urns(_cdpId), manager.urns(_cdpId), _ilk); if (_paybackAmount > debt) { ERC20(DAI_ADDRESS).transfer(_owner, (_paybackAmount - debt)); return debt; } uint debtLeft = debt - _paybackAmount; (,,,, uint dust) = vat.ilks(_ilk); dust = dust / 10**27; // Less than dust value if (debtLeft < dust) { uint amountOverDust = (dust - debtLeft); ERC20(DAI_ADDRESS).transfer(_owner, amountOverDust); return (_paybackAmount - amountOverDust); } return _paybackAmount; } receive() external override(FlashLoanReceiverBase, SaverExchangeCore) payable {} } contract CompoundFlashLoanTaker is CompoundSaverProxy, ProxyPermission, GasBurner { ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); address payable public constant COMPOUND_SAVER_FLASH_LOAN = 0xCeB190A35D9D4804b9CE8d0CF79239f6949BfCcB; address public constant AAVE_POOL_CORE = 0x3dfd23A6c5E8BbcFc9581d2E864a68feb6a076d3; /// @notice Repays the position with it's own fund or with FL if needed /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress, exchangeAddress] /// @param _gasCost Gas cost for specific transaction function repayWithLoan( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost ) public payable burnGas(25) { uint maxColl = getMaxCollateral(_cAddresses[0], address(this)); uint availableLiquidity = getAvailableLiquidity(_exData.srcAddr); if (_exData.srcAmount <= maxColl || availableLiquidity == 0) { repay(_exData, _cAddresses, _gasCost); } else { // 0x fee COMPOUND_SAVER_FLASH_LOAN.transfer(msg.value); uint loanAmount = (_exData.srcAmount - maxColl); if (loanAmount > availableLiquidity) loanAmount = availableLiquidity; bytes memory encoded = packExchangeData(_exData); bytes memory paramsData = abi.encode(encoded, _cAddresses, _gasCost, true, address(this)); givePermission(COMPOUND_SAVER_FLASH_LOAN); lendingPool.flashLoan(COMPOUND_SAVER_FLASH_LOAN, getUnderlyingAddr(_cAddresses[0]), loanAmount, paramsData); removePermission(COMPOUND_SAVER_FLASH_LOAN); logger.Log(address(this), msg.sender, "CompoundFlashRepay", abi.encode(loanAmount, _exData.srcAmount, _cAddresses[0])); } } /// @notice Boosts the position with it's own fund or with FL if needed /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress, exchangeAddress] /// @param _gasCost Gas cost for specific transaction function boostWithLoan( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost ) public payable burnGas(20) { uint maxBorrow = getMaxBorrow(_cAddresses[1], address(this)); uint availableLiquidity = getAvailableLiquidity(_exData.srcAddr); if (_exData.srcAmount <= maxBorrow || availableLiquidity == 0) { boost(_exData, _cAddresses, _gasCost); } else { // 0x fee COMPOUND_SAVER_FLASH_LOAN.transfer(msg.value); uint loanAmount = (_exData.srcAmount - maxBorrow); if (loanAmount > availableLiquidity) loanAmount = availableLiquidity; bytes memory paramsData = abi.encode(packExchangeData(_exData), _cAddresses, _gasCost, false, address(this)); givePermission(COMPOUND_SAVER_FLASH_LOAN); lendingPool.flashLoan(COMPOUND_SAVER_FLASH_LOAN, getUnderlyingAddr(_cAddresses[1]), loanAmount, paramsData); removePermission(COMPOUND_SAVER_FLASH_LOAN); logger.Log(address(this), msg.sender, "CompoundFlashBoost", abi.encode(loanAmount, _exData.srcAmount, _cAddresses[1])); } } function getAvailableLiquidity(address _tokenAddr) internal view returns (uint liquidity) { if (_tokenAddr == KYBER_ETH_ADDRESS) { liquidity = AAVE_POOL_CORE.balance; } else { liquidity = ERC20(_tokenAddr).balanceOf(AAVE_POOL_CORE); } } } contract CreamFlashLoanTaker is CreamSaverProxy, ProxyPermission, GasBurner { ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); address payable public constant COMPOUND_SAVER_FLASH_LOAN = 0x3ceD2067c0B057611e4E2686Dbe40028962Cc625; address public constant AAVE_POOL_CORE = 0x3dfd23A6c5E8BbcFc9581d2E864a68feb6a076d3; /// @notice Repays the position with it's own fund or with FL if needed /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress, exchangeAddress] /// @param _gasCost Gas cost for specific transaction function repayWithLoan( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost ) public payable burnGas(25) { uint maxColl = getMaxCollateral(_cAddresses[0], address(this)); uint availableLiquidity = getAvailableLiquidity(_exData.srcAddr); if (_exData.srcAmount <= maxColl || availableLiquidity == 0) { repay(_exData, _cAddresses, _gasCost); } else { // 0x fee COMPOUND_SAVER_FLASH_LOAN.transfer(msg.value); uint loanAmount = (_exData.srcAmount - maxColl); bytes memory encoded = packExchangeData(_exData); bytes memory paramsData = abi.encode(encoded, _cAddresses, _gasCost, true, address(this)); givePermission(COMPOUND_SAVER_FLASH_LOAN); lendingPool.flashLoan(COMPOUND_SAVER_FLASH_LOAN, getUnderlyingAddr(_cAddresses[0]), loanAmount, paramsData); removePermission(COMPOUND_SAVER_FLASH_LOAN); logger.Log(address(this), msg.sender, "CreamFlashRepay", abi.encode(loanAmount, _exData.srcAmount, _cAddresses[0])); } } /// @notice Boosts the position with it's own fund or with FL if needed /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress, exchangeAddress] /// @param _gasCost Gas cost for specific transaction function boostWithLoan( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost ) public payable burnGas(20) { uint maxBorrow = getMaxBorrow(_cAddresses[1], address(this)); uint availableLiquidity = getAvailableLiquidity(_exData.srcAddr); if (_exData.srcAmount <= maxBorrow || availableLiquidity == 0) { boost(_exData, _cAddresses, _gasCost); } else { // 0x fee COMPOUND_SAVER_FLASH_LOAN.transfer(msg.value); uint loanAmount = (_exData.srcAmount - maxBorrow); bytes memory paramsData = abi.encode(packExchangeData(_exData), _cAddresses, _gasCost, false, address(this)); givePermission(COMPOUND_SAVER_FLASH_LOAN); lendingPool.flashLoan(COMPOUND_SAVER_FLASH_LOAN, getUnderlyingAddr(_cAddresses[1]), loanAmount, paramsData); removePermission(COMPOUND_SAVER_FLASH_LOAN); logger.Log(address(this), msg.sender, "CreamFlashBoost", abi.encode(loanAmount, _exData.srcAmount, _cAddresses[1])); } } function getAvailableLiquidity(address _tokenAddr) internal view returns (uint liquidity) { if (_tokenAddr == KYBER_ETH_ADDRESS) { liquidity = AAVE_POOL_CORE.balance; } else { liquidity = ERC20(_tokenAddr).balanceOf(AAVE_POOL_CORE); } } }

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{"success": true, "error": null, "results": {"detectors": [{"check": "tx-origin", "impact": "Medium", "confidence": "Medium"}, {"check": "divide-before-multiply", "impact": "Medium", "confidence": "Medium"}, {"check": "name-reused", "impact": "High", "confidence": "High"}, {"check": "erc20-interface", "impact": "Medium", "confidence": "High"}, {"check": "arbitrary-send", "impact": "High", "confidence": "Medium"}, {"check": "unchecked-lowlevel", "impact": "Medium", "confidence": "Medium"}, {"check": "incorrect-equality", "impact": "Medium", "confidence": "High"}, {"check": "uninitialized-local", "impact": "Medium", "confidence": "Medium"}, {"check": "unchecked-transfer", "impact": "High", "confidence": "Medium"}, {"check": "unused-return", "impact": "Medium", "confidence": "Medium"}, {"check": "locked-ether", "impact": "Medium", "confidence": "High"}]}}

0x71fdd83ed8500eb994ced5833c5a99ced54c1413

pragma solidity 0.6.5; pragma experimental ABIEncoderV2; struct ProtocolBalance { ProtocolMetadata metadata; AdapterBalance[] adapterBalances; } struct ProtocolMetadata { string name; string description; string websiteURL; string iconURL; uint256 version; } struct AdapterBalance { AdapterMetadata metadata; FullTokenBalance[] balances; } struct AdapterMetadata { address adapterAddress; string adapterType; // "Asset", "Debt" } struct FullTokenBalance { TokenBalance base; TokenBalance[] underlying; } struct TokenBalance { TokenMetadata metadata; uint256 amount; } struct TokenMetadata { address token; string name; string symbol; uint8 decimals; } struct Component { address token; string tokenType; // "ERC20" by default uint256 rate; // price per full share (1e18) } interface ERC20 { function approve(address, uint256) external returns (bool); function transfer(address, uint256) external returns (bool); function transferFrom(address, address, uint256) external returns (bool); function name() external view returns (string memory); function symbol() external view returns (string memory); function decimals() external view returns (uint8); function totalSupply() external view returns (uint256); function balanceOf(address) external view returns (uint256); } interface TokenAdapter { /** * @dev MUST return TokenMetadata struct with ERC20-style token info. * struct TokenMetadata { * address token; * string name; * string symbol; * uint8 decimals; * } */ function getMetadata(address token) external view returns (TokenMetadata memory); /** * @dev MUST return array of Component structs with underlying tokens rates for the given token. * struct Component { * address token; // Address of token contract * string tokenType; // Token type ("ERC20" by default) * uint256 rate; // Price per share (1e18) * } */ function getComponents(address token) external view returns (Component[] memory); } interface PickleJar { function token() external view returns (address); function getRatio() external view returns (uint256); } contract PickleTokenAdapter is TokenAdapter { /** * @return TokenMetadata struct with ERC20-style token info. * @dev Implementation of TokenAdapter interface function. */ function getMetadata(address token) external view override returns (TokenMetadata memory) { return TokenMetadata({ token: token, name: ERC20(token).name(), symbol: ERC20(token).symbol(), decimals: ERC20(token).decimals() }); } /** * @return Array of Component structs with underlying tokens rates for the given token. * @dev Implementation of TokenAdapter interface function. */ function getComponents(address token) external view override returns (Component[] memory) { Component[] memory underlyingTokens = new Component[](1); underlyingTokens[0] = Component({ token: PickleJar(token).token(), tokenType: "ERC20", rate: PickleJar(token).getRatio() }); return underlyingTokens; } }

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{"success": true, "error": null, "results": {}}

0x7226daaf09b3972320db05f5ab81ff38417dd687

pragma solidity 0.5.12; ibrary EnumerableSet { struct AddressSet { // Position of the value in the `values` array, plus 1 because index 0 // means a value is not in the set. mapping (address => uint256) index; address[] values; } /** * @dev Add a value to a set. O(1). * Returns false if the value was already in the set. */ function add(AddressSet storage set, address value) internal returns (bool) { if (!contains(set, value)){ set.index[value] = set.values.push(value); return true; } else { return false; } } /** * @dev Removes a value from a set. O(1). * Returns false if the value was not present in the set. */ function remove(AddressSet storage set, address value) internal returns (bool) { if (contains(set, value)){ uint256 toDeleteIndex = set.index[value] - 1; uint256 lastIndex = set.values.length - 1; // If the element we're deleting is the last one, we can just remove it without doing a swap if (lastIndex != toDeleteIndex) { address lastValue = set.values[lastIndex]; // Move the last value to the index where the deleted value is set.values[toDeleteIndex] = lastValue; // Update the index for the moved value set.index[lastValue] = toDeleteIndex + 1; // All indexes are 1-based } // Delete the index entry for the deleted value delete set.index[value]; // Delete the old entry for the moved value set.values.pop(); return true; } else { return false; } } /** * @dev Returns true if the value is in the set. O(1). */ function contains(AddressSet storage set, address value) internal view returns (bool) { return set.index[value] != 0; } /** * @dev Returns an array with all values in the set. O(N). * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * WARNING: This function may run out of gas on large sets: use {length} and * {get} instead in these cases. */ function enumerate(AddressSet storage set) internal view returns (address[] memory) { address[] memory output = new address[](set.values.length); for (uint256 i; i < set.values.length; i++){ output[i] = set.values[i]; } return output; } /** * @dev Returns the number of elements on the set. O(1). */ function length(AddressSet storage set) internal view returns (uint256) { return set.values.length; } /** @dev Returns the element stored at position `index` in the set. O(1). * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function get(AddressSet storage set, uint256 index) internal view returns (address) { return set.values[index]; } } library Math { /** * @dev Returns the largest of two numbers. */ function max(uint256 a, uint256 b) internal pure returns (uint256) { return a >= b ? a : b; } /** * @dev Returns the smallest of two numbers. */ function min(uint256 a, uint256 b) internal pure returns (uint256) { return a < b ? a : b; } /** * @dev Returns the average of two numbers. The result is rounded towards * zero. */ function average(uint256 a, uint256 b) internal pure returns (uint256) { // (a + b) / 2 can overflow, so we distribute return (a / 2) + (b / 2) + ((a % 2 + b % 2) / 2); } } interface IBPool { function getDenormalizedWeight(address token) external view returns(uint256); function getBalance(address token) external view returns(uint256); function getSwapFee() external view returns(uint256); } interface IBFactory { function isBPool(address b) external view returns (bool); } contract BRegistry { using SafeMath for uint256; using EnumerableSet for EnumerableSet.AddressSet; struct PoolPairInfo { uint80 weight1; uint80 weight2; uint80 swapFee; uint256 liq; } struct SortedPools { EnumerableSet.AddressSet pools; bytes32 indices; } event PoolTokenPairAdded( address indexed pool, address indexed token1, address indexed token2 ); event IndicesUpdated( address indexed token1, address indexed token2, bytes32 oldIndices, bytes32 newIndices ); uint private constant BONE = 10**18; uint private constant MAX_SWAP_FEE = (3 * BONE) / 100; mapping(bytes32 => SortedPools) private _pools; mapping(address => mapping(bytes32 => PoolPairInfo)) private _infos; IBFactory bfactory; constructor(address _bfactory) public { bfactory = IBFactory(_bfactory); } function getPairInfo(address pool, address fromToken, address destToken) external view returns(uint256 weight1, uint256 weight2, uint256 swapFee) { bytes32 key = _createKey(fromToken, destToken); PoolPairInfo memory info = _infos[pool][key]; return (info.weight1, info.weight2, info.swapFee); } function getPoolsWithLimit(address fromToken, address destToken, uint256 offset, uint256 limit) public view returns(address[] memory result) { bytes32 key = _createKey(fromToken, destToken); result = new address[](Math.min(limit, _pools[key].pools.values.length - offset)); for (uint i = 0; i < result.length; i++) { result[i] = _pools[key].pools.values[offset + i]; } } function getBestPools(address fromToken, address destToken) external view returns(address[] memory pools) { return getBestPoolsWithLimit(fromToken, destToken, 32); } function getBestPoolsWithLimit(address fromToken, address destToken, uint256 limit) public view returns(address[] memory pools) { bytes32 key = _createKey(fromToken, destToken); bytes32 indices = _pools[key].indices; uint256 len = 0; while (indices[len] > 0 && len < Math.min(limit, indices.length)) { len++; } pools = new address[](len); for (uint i = 0; i < len; i++) { uint256 index = uint256(uint8(indices[i])).sub(1); pools[i] = _pools[key].pools.values[index]; } } // Add and update registry function addPoolPair(address pool, address token1, address token2) public returns(uint256 listed) { require(bfactory.isBPool(pool), "ERR_NOT_BPOOL"); uint256 swapFee = IBPool(pool).getSwapFee(); require(swapFee <= MAX_SWAP_FEE, "ERR_FEE_TOO_HIGH"); bytes32 key = _createKey(token1, token2); _pools[key].pools.add(pool); if (token1 < token2) { _infos[pool][key] = PoolPairInfo({ weight1: uint80(IBPool(pool).getDenormalizedWeight(token1)), weight2: uint80(IBPool(pool).getDenormalizedWeight(token2)), swapFee: uint80(swapFee), liq: uint256(0) }); } else { _infos[pool][key] = PoolPairInfo({ weight1: uint80(IBPool(pool).getDenormalizedWeight(token2)), weight2: uint80(IBPool(pool).getDenormalizedWeight(token1)), swapFee: uint80(swapFee), liq: uint256(0) }); } emit PoolTokenPairAdded( pool, token1, token2 ); listed++; } function addPools(address[] calldata pools, address token1, address token2) external returns(uint256[] memory listed) { listed = new uint256[](pools.length); for (uint i = 0; i < pools.length; i++) { listed[i] = addPoolPair(pools[i], token1, token2); } } function sortPools(address[] calldata tokens, uint256 lengthLimit) external { for (uint i = 0; i < tokens.length; i++) { for (uint j = i + 1; j < tokens.length; j++) { bytes32 key = _createKey(tokens[i], tokens[j]); address[] memory pools = getPoolsWithLimit(tokens[i], tokens[j], 0, Math.min(256, lengthLimit)); uint256[] memory effectiveLiquidity = _getEffectiveLiquidityForPools(tokens[i], tokens[j], pools); bytes32 indices = _buildSortIndices(effectiveLiquidity); // console.logBytes32(indices); if (indices != _pools[key].indices) { emit IndicesUpdated( tokens[i] < tokens[j] ? tokens[i] : tokens[j], tokens[i] < tokens[j] ? tokens[j] : tokens[i], _pools[key].indices, indices ); _pools[key].indices = indices; } } } } function sortPoolsWithPurge(address[] calldata tokens, uint256 lengthLimit) external { for (uint i = 0; i < tokens.length; i++) { for (uint j = i + 1; j < tokens.length; j++) { bytes32 key = _createKey(tokens[i], tokens[j]); address[] memory pools = getPoolsWithLimit(tokens[i], tokens[j], 0, Math.min(256, lengthLimit)); uint256[] memory effectiveLiquidity = _getEffectiveLiquidityForPoolsPurge(tokens[i], tokens[j], pools); bytes32 indices = _buildSortIndices(effectiveLiquidity); if (indices != _pools[key].indices) { emit IndicesUpdated( tokens[i] < tokens[j] ? tokens[i] : tokens[j], tokens[i] < tokens[j] ? tokens[j] : tokens[i], _pools[key].indices, indices ); _pools[key].indices = indices; } } } } // Internal function _createKey(address token1, address token2) internal pure returns(bytes32) { return bytes32( (uint256(uint128((token1 < token2) ? token1 : token2)) << 128) | (uint256(uint128((token1 < token2) ? token2 : token1))) ); } function _getEffectiveLiquidityForPools(address token1, address token2, address[] memory pools) internal view returns(uint256[] memory effectiveLiquidity) { effectiveLiquidity = new uint256[](pools.length); for (uint i = 0; i < pools.length; i++) { bytes32 key = _createKey(token1, token2); PoolPairInfo memory info = _infos[pools[i]][key]; if (token1 < token2) { // we define effective liquidity as b2 * w1 / (w1 + w2) effectiveLiquidity[i] = bdiv(uint256(info.weight1),uint256(info.weight1).add(uint256(info.weight2))); effectiveLiquidity[i] = effectiveLiquidity[i].mul(IBPool(pools[i]).getBalance(token2)); // console.log("1. %s: %s", pools[i], effectiveLiquidity[i]); } else { effectiveLiquidity[i] = bdiv(uint256(info.weight2),uint256(info.weight1).add(uint256(info.weight2))); effectiveLiquidity[i] = effectiveLiquidity[i].mul(IBPool(pools[i]).getBalance(token2)); // console.log("2. %s: %s", pools[i], effectiveLiquidity[i]); } } } // Calculates total liquidity for all existing token pair pools // Removes any that are below threshold function _getEffectiveLiquidityForPoolsPurge(address token1, address token2, address[] memory pools) public returns(uint256[] memory effectiveLiquidity) { uint256 totalLiq = 0; bytes32 key = _createKey(token1, token2); // Store each pools liquidity and sum total liquidity for (uint i = 0; i < pools.length; i++) { PoolPairInfo memory info = _infos[pools[i]][key]; if (token1 < token2) { // we define effective liquidity as b2 * w1 / (w1 + w2) _infos[pools[i]][key].liq = bdiv(uint256(info.weight1), uint256(info.weight1).add(uint256(info.weight2))); _infos[pools[i]][key].liq = _infos[pools[i]][key].liq.mul(IBPool(pools[i]).getBalance(token2)); totalLiq = totalLiq.add(_infos[pools[i]][key].liq); // console.log("1. %s: %s", pools[i], _infos[pools[i]][key].liq); } else { _infos[pools[i]][key].liq = bdiv(uint256(info.weight2), uint256(info.weight1).add(uint256(info.weight2))); _infos[pools[i]][key].liq = _infos[pools[i]][key].liq.mul(IBPool(pools[i]).getBalance(token2)); totalLiq = totalLiq.add(_infos[pools[i]][key].liq); // console.log("2. %s: %s", pools[i], _infos[pools[i]][key].liq); } } uint256 threshold = bmul(totalLiq, ((10 * BONE) / 100)); // console.log("totalLiq: %s, Thresh: %s", totalLiq, threshold); // Delete any pools that aren't greater than threshold (10% of total) for(uint i = 0;i < _pools[key].pools.length();i++){ //console.log("Pool: %s, %s", _pools[key].pools.values[i], info.liq); if(_infos[_pools[key].pools.values[i]][key].liq < threshold){ _pools[key].pools.remove(_pools[key].pools.values[i]); } } effectiveLiquidity = new uint256[](_pools[key].pools.length()); // pool.remove reorders pools so need to use correct liq for index for(uint i = 0;i < _pools[key].pools.length();i++){ // console.log(_pools[key].pools.values[i]); effectiveLiquidity[i] = _infos[_pools[key].pools.values[i]][key].liq; } } function bdiv(uint a, uint b) internal pure returns (uint) { require(b != 0, "ERR_DIV_ZERO"); uint c0 = a * BONE; require(a == 0 || c0 / a == BONE, "ERR_DIV_INTERNAL"); // bdiv overflow uint c1 = c0 + (b / 2); require(c1 >= c0, "ERR_DIV_INTERNAL"); // badd require uint c2 = c1 / b; return c2; } function bmul(uint a, uint b) internal pure returns (uint) { uint c0 = a * b; require(a == 0 || c0 / a == b, "ERR_MUL_OVERFLOW"); uint c1 = c0 + (BONE / 2); require(c1 >= c0, "ERR_MUL_OVERFLOW"); uint c2 = c1 / BONE; return c2; } function _buildSortIndices(uint256[] memory effectiveLiquidity) internal pure returns(bytes32) { uint256 result = 0; uint256 prevEffectiveLiquidity = uint256(-1); for (uint i = 0; i < Math.min(effectiveLiquidity.length, 32); i++) { uint256 bestIndex = 0; for (uint j = 0; j < effectiveLiquidity.length; j++) { if ((effectiveLiquidity[j] > effectiveLiquidity[bestIndex] && effectiveLiquidity[j] < prevEffectiveLiquidity) || effectiveLiquidity[bestIndex] >= prevEffectiveLiquidity) { bestIndex = j; } } prevEffectiveLiquidity = effectiveLiquidity[bestIndex]; result |= (bestIndex + 1) << (248 - i * 8); } return bytes32(result); } } library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot overflow. * * _Available since v2.4.0._ */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. * * _Available since v2.4.0._ */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { // Solidity only automatically asserts when dividing by 0 require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. * * _Available since v2.4.0._ */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } }

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{"success": true, "error": null, "results": {"detectors": [{"check": "unused-return", "impact": "Medium", "confidence": "Medium"}, {"check": "uninitialized-local", "impact": "Medium", "confidence": "Medium"}]}}

0x72cbA355A6F104DE8A78005CF5fFfCbaef2a58F8

pragma solidity 0.5.17; library Math { /** * @dev Returns the largest of two numbers. */ function max(uint256 a, uint256 b) internal pure returns (uint256) { return a >= b ? a : b; } /** * @dev Returns the smallest of two numbers. */ function min(uint256 a, uint256 b) internal pure returns (uint256) { return a < b ? a : b; } /** * @dev Returns the average of two numbers. The result is rounded towards * zero. */ function average(uint256 a, uint256 b) internal pure returns (uint256) { // (a + b) / 2 can overflow, so we distribute return (a / 2) + (b / 2) + ((a % 2 + b % 2) / 2); } } library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot overflow. * * _Available since v2.4.0._ */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. * * _Available since v2.4.0._ */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { // Solidity only automatically asserts when dividing by 0 require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. * * _Available since v2.4.0._ */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } contract Context { // Empty internal constructor, to prevent people from mistakenly deploying // an instance of this contract, which should be used via inheritance. constructor () internal { } // solhint-disable-previous-line no-empty-blocks function _msgSender() internal view returns (address payable) { return msg.sender; } function _msgData() internal view returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor () internal { _owner = _msgSender(); emit OwnershipTransferred(address(0), _owner); } /** * @dev Returns the address of the current owner. */ function owner() public view returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(isOwner(), "Ownable: caller is not the owner"); _; } /** * @dev Returns true if the caller is the current owner. */ function isOwner() public view returns (bool) { return _msgSender() == _owner; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public onlyOwner { emit OwnershipTransferred(_owner, address(0)); _owner = address(0); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public onlyOwner { _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). */ function _transferOwnership(address newOwner) internal { require(newOwner != address(0), "Ownable: new owner is the zero address"); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } } interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } library Address { /** * @dev Returns true if `account` is a contract. * * This test is non-exhaustive, and there may be false-negatives: during the * execution of a contract's constructor, its address will be reported as * not containing a contract. * * IMPORTANT: It is unsafe to assume that an address for which this * function returns false is an externally-owned account (EOA) and not a * contract. */ function isContract(address account) internal view returns (bool) { // This method relies in extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. // According to EIP-1052, 0x0 is the value returned for not-yet created accounts // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned // for accounts without code, i.e. `keccak256('')` bytes32 codehash; bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470; // solhint-disable-next-line no-inline-assembly assembly { codehash := extcodehash(account) } return (codehash != 0x0 && codehash != accountHash); } /** * @dev Converts an `address` into `address payable`. Note that this is * simply a type cast: the actual underlying value is not changed. * * _Available since v2.4.0._ */ function toPayable(address account) internal pure returns (address payable) { return address(uint160(account)); } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. * * _Available since v2.4.0._ */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-call-value (bool success, ) = recipient.call.value(amount)(""); require(success, "Address: unable to send value, recipient may have reverted"); } } library SafeERC20 { using SafeMath for uint256; using Address for address; function safeTransfer(IERC20 token, address to, uint256 value) internal { callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal { callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value)); } function safeApprove(IERC20 token, address spender, uint256 value) internal { // safeApprove should only be called when setting an initial allowance, // or when resetting it to zero. To increase and decrease it, use // 'safeIncreaseAllowance' and 'safeDecreaseAllowance' // solhint-disable-next-line max-line-length require((value == 0) || (token.allowance(address(this), spender) == 0), "SafeERC20: approve from non-zero to non-zero allowance" ); callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value)); } function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).add(value); callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero"); callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). */ function callOptionalReturn(IERC20 token, bytes memory data) private { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. // A Solidity high level call has three parts: // 1. The target address is checked to verify it contains contract code // 2. The call itself is made, and success asserted // 3. The return value is decoded, which in turn checks the size of the returned data. // solhint-disable-next-line max-line-length require(address(token).isContract(), "SafeERC20: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = address(token).call(data); require(success, "SafeERC20: low-level call failed"); if (returndata.length > 0) { // Return data is optional // solhint-disable-next-line max-line-length require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } } } contract IRewardDistributionRecipient is Ownable { address public rewardDistribution; function notifyRewardAmount(uint256 reward) external; modifier onlyRewardDistribution() { require(_msgSender() == rewardDistribution, "Caller is not reward distribution"); _; } function setRewardDistribution(address _rewardDistribution) external onlyOwner { rewardDistribution = _rewardDistribution; } } contract LPTokenWrapper { using SafeMath for uint256; using SafeERC20 for IERC20; IERC20 public wrappedToken; uint256 public _totalSupply; mapping(address => uint256) public _balances; constructor(IERC20 _wrappedToken) public { wrappedToken = _wrappedToken; } function totalSupply() public view returns (uint256) { return _totalSupply; } function balanceOf(address account) public view returns (uint256) { return _balances[account]; } function stake(uint256 amount) public { _totalSupply = _totalSupply.add(amount); _balances[msg.sender] = _balances[msg.sender].add(amount); wrappedToken.safeTransferFrom(msg.sender, address(this), amount); } function withdraw(uint256 amount) public { _totalSupply = _totalSupply.sub(amount); _balances[msg.sender] = _balances[msg.sender].sub(amount); wrappedToken.safeTransfer(msg.sender, amount); } } interface HAM { function hamsScalingFactor() external returns (uint256); function mint(address to, uint256 amount) external; } contract Farm is LPTokenWrapper, IRewardDistributionRecipient { IERC20 public ham; uint256 public duration; uint256 public startTime; uint256 public periodFinish = 0; uint256 public rewardRate = 0; uint256 public lastUpdateTime; uint256 public rewardPerTokenStored; mapping(address => uint256) public userRewardPerTokenPaid; mapping(address => uint256) public rewards; event RewardAdded(uint256 reward); event Staked(address indexed user, uint256 amount); event Withdrawn(address indexed user, uint256 amount); event RewardPaid(address indexed user, uint256 reward); constructor( IERC20 _ham, IERC20 _wrappedToken ) LPTokenWrapper(_wrappedToken) public { ham = _ham; } function initialize(uint256 _startTime, uint256 _duration) public onlyOwner { require(startTime == 0, "already initialized"); startTime = _startTime; duration = _duration; } modifier checkStart() { require(startTime > 0,"not initialized"); require(block.timestamp >= startTime,"not start"); _; } modifier updateReward(address account) { rewardPerTokenStored = rewardPerToken(); lastUpdateTime = lastTimeRewardApplicable(); if (account != address(0)) { rewards[account] = earned(account); userRewardPerTokenPaid[account] = rewardPerTokenStored; } _; } function lastTimeRewardApplicable() public view returns (uint256) { return Math.min(block.timestamp, periodFinish); } function rewardPerToken() public view returns (uint256) { if (totalSupply() == 0) { return rewardPerTokenStored; } return rewardPerTokenStored.add( lastTimeRewardApplicable() .sub(lastUpdateTime) .mul(rewardRate) .mul(1e18) .div(totalSupply()) ); } function earned(address account) public view returns (uint256) { return balanceOf(account) .mul(rewardPerToken().sub(userRewardPerTokenPaid[account])) .div(1e18) .add(rewards[account]); } // stake visibility is public as overriding LPTokenWrapper's stake() function function stake(uint256 amount) public updateReward(msg.sender) checkStart { require(amount > 0, "Cannot stake 0"); super.stake(amount); emit Staked(msg.sender, amount); } function withdraw(uint256 amount) public updateReward(msg.sender) checkStart { require(amount > 0, "Cannot withdraw 0"); super.withdraw(amount); emit Withdrawn(msg.sender, amount); } function exit() external { if (balanceOf(msg.sender) > 0) { withdraw(balanceOf(msg.sender)); } getReward(); } function getReward() public updateReward(msg.sender) checkStart { uint256 reward = earned(msg.sender); if (reward > 0) { rewards[msg.sender] = 0; uint256 scalingFactor = HAM(address(ham)).hamsScalingFactor(); uint256 trueReward = reward.mul(scalingFactor).div(10**18); ham.safeTransfer(msg.sender, trueReward); emit RewardPaid(msg.sender, trueReward); } } function notifyRewardAmount(uint256 reward) public onlyRewardDistribution updateReward(address(0)) { if (block.timestamp > startTime) { if (block.timestamp >= periodFinish) { rewardRate = reward.div(duration); } else { uint256 remaining = periodFinish.sub(block.timestamp); uint256 leftover = remaining.mul(rewardRate); rewardRate = reward.add(leftover).div(duration); } lastUpdateTime = block.timestamp; periodFinish = block.timestamp.add(duration); emit RewardAdded(reward); } else { rewardRate = reward.div(duration); lastUpdateTime = startTime; periodFinish = startTime.add(duration); emit RewardAdded(reward); } } } contract Trough is Farm { using SafeMath for uint256; using SafeERC20 for IERC20; uint256 private rewardMultiplier; uint256 private rewardDivisor; event Fed(address indexed user, uint256 amount); constructor( IERC20 _ham, IERC20 _wrappedToken, uint256 _rewardMultiplier, uint256 _rewardDivisor ) Farm(_ham, _wrappedToken) public { rewardMultiplier = _rewardMultiplier; rewardDivisor = _rewardDivisor; } function stake(uint256 amount) checkStart public { wrappedToken.safeTransferFrom(msg.sender, address(this), amount); rewards[msg.sender] = rewards[msg.sender].add(amount.mul(rewardMultiplier).div(rewardDivisor)); emit Fed(msg.sender, amount); } }

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{"success": true, "error": null, "results": {"detectors": [{"check": "divide-before-multiply", "impact": "Medium", "confidence": "Medium"}, {"check": "reentrancy-no-eth", "impact": "Medium", "confidence": "Medium"}]}}

0x72F020f8f3E8fd9382705723Cd26380f8D0c66Bb

pragma solidity 0.5.7; interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a `Transfer` event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Mints `amount` tokens to address `account`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a `Transfer` event. */ function mint(address account, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through `transferFrom`. This is * zero by default. * * This value changes when `approve` or `transferFrom` are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * > Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an `Approval` event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a `Transfer` event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to `approve`. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { require(b <= a, "SafeMath: subtraction overflow"); uint256 c = a - b; return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot overflow. * * _Available since v2.4.0._ */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { // Solidity only automatically asserts when dividing by 0 require(b > 0, "SafeMath: division by zero"); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { require(b != 0, "SafeMath: modulo by zero"); return a % b; } } library SafeMath64 { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * - Addition cannot overflow. */ function add(uint64 a, uint64 b) internal pure returns (uint64) { uint64 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot overflow. */ function sub(uint64 a, uint64 b) internal pure returns (uint64) { require(b <= a, "SafeMath: subtraction overflow"); uint64 c = a - b; return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot overflow. * * _Available since v2.4.0._ */ function sub(uint64 a, uint64 b, string memory errorMessage) internal pure returns (uint64) { require(b <= a, errorMessage); uint64 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * - Multiplication cannot overflow. */ function mul(uint64 a, uint64 b) internal pure returns (uint64) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint64 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function div(uint64 a, uint64 b) internal pure returns (uint64) { // Solidity only automatically asserts when dividing by 0 require(b > 0, "SafeMath: division by zero"); uint64 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function mod(uint64 a, uint64 b) internal pure returns (uint64) { require(b != 0, "SafeMath: modulo by zero"); return a % b; } } contract ERC20 is IERC20 { using SafeMath for uint256; mapping (address => uint256) internal _balances; mapping (address => mapping (address => uint256)) private _allowances; uint256 private _totalSupply; /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to `approve`. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); /** * @dev See `IERC20.totalSupply`. */ function totalSupply() public view returns (uint256) { return _totalSupply; } /** * @dev See `IERC20.balanceOf`. */ function balanceOf(address account) public view returns (uint256) { return _balances[account]; } /** * @dev See `IERC20.transfer`. * * Requirements: * * - `recipient` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address recipient, uint256 amount) public returns (bool) { _transfer(msg.sender, recipient, amount); return true; } /** * @dev See `IERC20.allowance`. */ function allowance(address owner, address spender) public view returns (uint256) { return _allowances[owner][spender]; } /** * @dev See `IERC20.approve`. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 value) public returns (bool) { _approve(msg.sender, spender, value); return true; } /** * @dev See `IERC20.transferFrom`. * * Emits an `Approval` event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of `ERC20`; * * Requirements: * - `sender` and `recipient` cannot be the zero address. * - `sender` must have a balance of at least `value`. * - the caller must have allowance for `sender`'s tokens of at least * `amount`. */ function transferFrom(address sender, address recipient, uint256 amount) public returns (bool) { _transfer(sender, recipient, amount); _approve(sender, msg.sender, _allowances[sender][msg.sender].sub(amount)); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to `approve` that can be used as a mitigation for * problems described in `IERC20.approve`. * * Emits an `Approval` event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public returns (bool) { _approve(msg.sender, spender, _allowances[msg.sender][spender].add(addedValue)); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to `approve` that can be used as a mitigation for * problems described in `IERC20.approve`. * * Emits an `Approval` event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool) { _approve(msg.sender, spender, _allowances[msg.sender][spender].sub(subtractedValue)); return true; } /** * @dev Moves tokens `amount` from `sender` to `recipient`. * * This is internal function is equivalent to `transfer`, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a `Transfer` event. * * Requirements: * * - `sender` cannot be the zero address. * - `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. */ function _transfer(address sender, address recipient, uint256 amount) internal { require(sender != address(0), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); _balances[sender] = _balances[sender].sub(amount); _balances[recipient] = _balances[recipient].add(amount); emit Transfer(sender, recipient, amount); } /** * @dev Moves tokens `amount` from `sender` to `recipient`. * * Emits an `Approval` event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of `ERC20`; * * Requirements: * - `sender` and `recipient` cannot be the zero address. * - `sender` must have a balance of at least `value`. * - the caller must have allowance for `sender`'s tokens of at least * `amount`. */ function _transferFrom(address sender, address recipient, uint256 amount) internal { _transfer(sender, recipient, amount); _approve(sender, msg.sender, _allowances[sender][msg.sender].sub(amount)); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a `Transfer` event with `from` set to the zero address. * * Requirements * * - `to` cannot be the zero address. */ function _mint(address account, uint256 amount) internal { require(account != address(0), "ERC20: mint to the zero address"); _totalSupply = _totalSupply.add(amount); _balances[account] = _balances[account].add(amount); emit Transfer(address(0), account, amount); } /** * @dev Destoys `amount` tokens from `account`, reducing the * total supply. * * Emits a `Transfer` event with `to` set to the zero address. * * Requirements * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 value) internal { require(account != address(0), "ERC20: burn from the zero address"); _totalSupply = _totalSupply.sub(value); _balances[account] = _balances[account].sub(value); emit Transfer(account, address(0), value); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens. * * This is internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an `Approval` event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve(address owner, address spender, uint256 value) internal { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = value; emit Approval(owner, spender, value); } /** * @dev Destoys `amount` tokens from `account`.`amount` is then deducted * from the caller's allowance. * * See `_burn` and `_approve`. */ function _burnFrom(address account, uint256 amount) internal { _burn(account, amount); _approve(account, msg.sender, _allowances[account][msg.sender].sub(amount)); } } contract PlotXToken is ERC20 { using SafeMath for uint256; mapping(address => uint256) public lockedForGV; string public name = "PLOT"; string public symbol = "PLOT"; uint8 public decimals = 18; address public operator; modifier onlyOperator() { require(msg.sender == operator, "Not operator"); _; } /** * @dev Initialize PLOT token * @param _initialSupply Initial token supply * @param _initialTokenHolder Initial token holder address */ constructor(uint256 _initialSupply, address _initialTokenHolder) public { _mint(_initialTokenHolder, _initialSupply); operator = _initialTokenHolder; } /** * @dev change operator address * @param _newOperator address of new operator */ function changeOperator(address _newOperator) public onlyOperator returns (bool) { require(_newOperator != address(0), "New operator cannot be 0 address"); operator = _newOperator; return true; } /** * @dev burns an amount of the tokens of the message sender * account. * @param amount The amount that will be burnt. */ function burn(uint256 amount) public { _burn(msg.sender, amount); } /** * @dev Burns a specific amount of tokens from the target address and decrements allowance * @param from address The address which you want to send tokens from * @param value uint256 The amount of token to be burned */ function burnFrom(address from, uint256 value) public { _burnFrom(from, value); } /** * @dev function that mints an amount of the token and assigns it to * an account. * @param account The account that will receive the created tokens. * @param amount The amount that will be created. */ function mint(address account, uint256 amount) public onlyOperator returns (bool) { _mint(account, amount); return true; } /** * @dev Transfer token for a specified address * @param to The address to transfer to. * @param value The amount to be transferred. */ function transfer(address to, uint256 value) public returns (bool) { require(lockedForGV[msg.sender] < now, "Locked for governance"); // if not voted under governance _transfer(msg.sender, to, value); return true; } /** * @dev Transfer tokens from one address to another * @param from address The address which you want to send tokens from * @param to address The address which you want to transfer to * @param value uint256 the amount of tokens to be transferred */ function transferFrom( address from, address to, uint256 value ) public returns (bool) { require(lockedForGV[from] < now, "Locked for governance"); // if not voted under governance _transferFrom(from, to, value); return true; } /** * @dev Lock the user's tokens * @param _of user's address. */ function lockForGovernanceVote(address _of, uint256 _period) public onlyOperator { if (_period.add(now) > lockedForGV[_of]) lockedForGV[_of] = _period.add(now); } function isLockedForGV(address _of) public view returns (bool) { return (lockedForGV[_of] > now); } }

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{"success": true, "error": null, "results": {}}

0x7330ed7ba2b296a096c0e27a6e47faf9eb91f720

pragma solidity 0.6.12; contract Initializable { /** * @dev Indicates that the contract has been initialized. */ bool private initialized; /** * @dev Indicates that the contract is in the process of being initialized. */ bool private initializing; /** * @dev Modifier to use in the initializer function of a contract. */ modifier initializer() { require(initializing || isConstructor() || !initialized, "Contract instance has already been initialized"); bool isTopLevelCall = !initializing; if (isTopLevelCall) { initializing = true; initialized = true; } _; if (isTopLevelCall) { initializing = false; } } /** * @dev Modifier to use in the initializer function of a contract when upgrade EVEN times. */ modifier initializerEven() { require(initializing || isConstructor() || initialized, "Contract instance has already been initialized EVEN times"); bool isTopLevelCall = !initializing; if (isTopLevelCall) { initializing = true; initialized = false; } _; if (isTopLevelCall) { initializing = false; } } /// @dev Returns true if and only if the function is running in the constructor function isConstructor() private view returns (bool) { // extcodesize checks the size of the code stored in an address, and // address returns the current address. Since the code is still not // deployed when running a constructor, any checks on its code size will // yield zero, making it an effective way to detect if a contract is // under construction or not. address self = address(this); uint256 cs; assembly { cs := extcodesize(self) } return cs == 0; } // Reserved storage space to allow for layout changes in the future. uint256[50] private ______gap; } contract Governable is Initializable { address public governor; event GovernorshipTransferred(address indexed previousGovernor, address indexed newGovernor); /** * @dev Contract initializer. * called once by the factory at time of deployment */ function initialize(address governor_) virtual public initializer { governor = governor_; emit GovernorshipTransferred(address(0), governor); } modifier governance() { require(msg.sender == governor); _; } /** * @dev Allows the current governor to relinquish control of the contract. * @notice Renouncing to governorship will leave the contract without an governor. * It will not be possible to call the functions with the `governance` * modifier anymore. */ function renounceGovernorship() public governance { emit GovernorshipTransferred(governor, address(0)); governor = address(0); } /** * @dev Allows the current governor to transfer control of the contract to a newGovernor. * @param newGovernor The address to transfer governorship to. */ function transferGovernorship(address newGovernor) public governance { _transferGovernorship(newGovernor); } /** * @dev Transfers control of the contract to a newGovernor. * @param newGovernor The address to transfer governorship to. */ function _transferGovernorship(address newGovernor) internal { require(newGovernor != address(0)); emit GovernorshipTransferred(governor, newGovernor); governor = newGovernor; } } contract Configurable is Governable { mapping (bytes32 => uint) internal config; function getConfig(bytes32 key) public view returns (uint) { return config[key]; } function getConfig(bytes32 key, uint index) public view returns (uint) { return config[bytes32(uint(key) ^ index)]; } function getConfig(bytes32 key, address addr) public view returns (uint) { return config[bytes32(uint(key) ^ uint(addr))]; } function _setConfig(bytes32 key, uint value) internal { if(config[key] != value) config[key] = value; } function _setConfig(bytes32 key, uint index, uint value) internal { _setConfig(bytes32(uint(key) ^ index), value); } function _setConfig(bytes32 key, address addr, uint value) internal { _setConfig(bytes32(uint(key) ^ uint(addr)), value); } function setConfig(bytes32 key, uint value) external governance { _setConfig(key, value); } function setConfig(bytes32 key, uint index, uint value) external governance { _setConfig(bytes32(uint(key) ^ index), value); } function setConfig(bytes32 key, address addr, uint value) external governance { _setConfig(bytes32(uint(key) ^ uint(addr)), value); } } interface Minter { event Minted(address indexed recipient, address reward_contract, uint minted); function token() external view returns (address); function controller() external view returns (address); function minted(address, address) external view returns (uint); function allowed_to_mint_for(address, address) external view returns (bool); function mint(address gauge) external; function mint_many(address[8] calldata gauges) external; function mint_for(address gauge, address _for) external; function toggle_approve_mint(address minting_user) external; } interface LiquidityGauge { event Deposit(address indexed provider, uint value); event Withdraw(address indexed provider, uint value); event UpdateLiquidityLimit(address user, uint original_balance, uint original_supply, uint working_balance, uint working_supply); function user_checkpoint (address addr) external returns (bool); function claimable_tokens(address addr) external view returns (uint); function claimable_reward(address addr) external view returns (uint); function integrate_checkpoint() external view returns (uint); function kick(address addr) external; function set_approve_deposit(address addr, bool can_deposit) external; function deposit(uint _value) external; function deposit(uint _value, address addr) external; function withdraw(uint _value) external; function withdraw(uint _value, bool claim_rewards) external; function claim_rewards() external; function claim_rewards(address addr) external; function minter() external view returns (address); function crv_token() external view returns (address); function lp_token() external view returns (address); function controller() external view returns (address); function voting_escrow() external view returns (address); function balanceOf(address) external view returns (uint); function totalSupply() external view returns (uint); function future_epoch_time() external view returns (uint); function approved_to_deposit(address, address) external view returns (bool); function working_balances(address) external view returns (uint); function working_supply() external view returns (uint); function period() external view returns (int128); function period_timestamp(uint) external view returns (uint); function integrate_inv_supply(uint) external view returns (uint); function integrate_inv_supply_of(address) external view returns (uint); function integrate_checkpoint_of(address) external view returns (uint); function integrate_fraction(address) external view returns (uint); function inflation_rate() external view returns (uint); function reward_contract() external view returns (address); function rewarded_token() external view returns (address); function reward_integral() external view returns (uint); function reward_integral_for(address) external view returns (uint); function rewards_for(address) external view returns (uint); function claimed_rewards_for(address) external view returns (uint); } interface IStakingRewards { // Views function lastTimeRewardApplicable() external view returns (uint256); function rewardPerToken() external view returns (uint256); function rewards(address account) external view returns (uint256); function earned(address account) external view returns (uint256); function getRewardForDuration() external view returns (uint256); function totalSupply() external view returns (uint256); function balanceOf(address account) external view returns (uint256); // Mutative function stake(uint256 amount) external; function withdraw(uint256 amount) external; function getReward() external; function exit() external; // Events event RewardAdded(uint256 reward); event Staked(address indexed user, uint256 amount); event Withdrawn(address indexed user, uint256 amount); event RewardPaid(address indexed user, uint256 reward); } interface IStakingRewards2 is IStakingRewards { function totalMinted() external view returns (uint); function weightOfGauge(address gauge) external view returns (uint); function stakingPerLPT(address gauge) external view returns (uint); function stakeTimeOf(address account) external view returns (uint); function stakeAgeOf(address account) external view returns (uint); function factorOf(address account) external view returns (uint); function spendTimeOf(address account) external view returns (uint); function spendAgeOf(address account) external view returns (uint); function coinAgeOf(address account) external view returns (uint); function spendCoinAge(address account, uint coinAge) external returns (uint); event SpentCoinAge(address indexed gauge, address indexed account, uint coinAge); } contract SSimpleGauge is LiquidityGauge, Configurable { using SafeMath for uint; using TransferHelper for address; address override public minter; address override public crv_token; address override public lp_token; address override public controller; address override public voting_escrow; mapping(address => uint) override public balanceOf; uint override public totalSupply; uint override public future_epoch_time; // caller -> recipient -> can deposit? mapping(address => mapping(address => bool)) override public approved_to_deposit; mapping(address => uint) override public working_balances; uint override public working_supply; // The goal is to be able to calculate ∫(rate * balance / totalSupply dt) from 0 till checkpoint // All values are kept in units of being multiplied by 1e18 int128 override public period; uint256[100000000000000000000000000000] override public period_timestamp; // 1e18 * ∫(rate(t) / totalSupply(t) dt) from 0 till checkpoint uint256[100000000000000000000000000000] override public integrate_inv_supply; // bump epoch when rate() changes // 1e18 * ∫(rate(t) / totalSupply(t) dt) from (last_action) till checkpoint mapping(address => uint) override public integrate_inv_supply_of; mapping(address => uint) override public integrate_checkpoint_of; // ∫(balance * rate(t) / totalSupply(t) dt) from 0 till checkpoint // Units: rate * t = already number of coins per address to issue mapping(address => uint) override public integrate_fraction; uint override public inflation_rate; // For tracking external rewards address override public reward_contract; address override public rewarded_token; uint override public reward_integral; mapping(address => uint) override public reward_integral_for; mapping(address => uint) override public rewards_for; mapping(address => uint) override public claimed_rewards_for; uint public span; uint public end; function initialize(address governor, address _minter, address _lp_token) public initializer { super.initialize(governor); minter = _minter; crv_token = Minter(_minter).token(); lp_token = _lp_token; IERC20(lp_token).totalSupply(); // just check } function setSpan(uint _span, bool isLinear) virtual external governance { span = _span; if(isLinear) end = now + _span; else end = 0; } function kick(address addr) virtual override external { _checkpoint(addr, true); } function set_approve_deposit(address addr, bool can_deposit) virtual override external { approved_to_deposit[addr][msg.sender] = can_deposit; } function deposit(uint amount) virtual override external { deposit(amount, msg.sender); } function deposit(uint amount, address addr) virtual override public { require(addr == msg.sender || approved_to_deposit[msg.sender][addr], 'Not approved'); _checkpoint(addr, true); _deposit(addr, amount); balanceOf[addr] = balanceOf[addr].add(amount); totalSupply = totalSupply.add(amount); emit Deposit(addr, amount); } function _deposit(address addr, uint amount) virtual internal { lp_token.safeTransferFrom(addr, address(this), amount); } function withdraw() virtual external { withdraw(balanceOf[msg.sender], true); } function withdraw(uint amount) virtual override external { withdraw(amount, true); } function withdraw(uint amount, bool claim_rewards) virtual override public { _checkpoint(msg.sender, claim_rewards); totalSupply = totalSupply.sub(amount); balanceOf[msg.sender] = balanceOf[msg.sender].sub(amount); _withdraw(msg.sender, amount); emit Withdraw(msg.sender, amount); } function _withdraw(address to, uint amount) virtual internal { lp_token.safeTransfer(to, amount); } function claimable_reward(address) virtual override public view returns (uint) { return 0; } function claim_rewards() virtual override public { return claim_rewards(msg.sender); } function claim_rewards(address) virtual override public { return; } function _checkpoint_rewards(address, bool) virtual internal { return; } function claimable_tokens(address addr) virtual override public view returns (uint amount) { if(span == 0 || totalSupply == 0) return 0; amount = SMinter(minter).quotas(address(this)); amount = amount.mul(balanceOf[addr]).div(totalSupply); uint lasttime = integrate_checkpoint_of[addr]; if(end == 0) { // isNonLinear, endless if(now.sub(lasttime) < span) amount = amount.mul(now.sub(lasttime)).div(span); }else if(now < end) amount = amount.mul(now.sub(lasttime)).div(end.sub(lasttime)); else if(lasttime >= end) amount = 0; } function _checkpoint(address addr, uint amount) virtual internal { if(amount > 0) { integrate_fraction[addr] = integrate_fraction[addr].add(amount); address teamAddr = address(config['teamAddr']); uint teamRatio = config['teamRatio']; if(teamAddr != address(0) && teamRatio != 0) integrate_fraction[teamAddr] = integrate_fraction[teamAddr].add(amount.mul(teamRatio).div(1 ether)); } } function _checkpoint(address addr, bool _claim_rewards) virtual internal { uint amount = claimable_tokens(addr); _checkpoint(addr, amount); _checkpoint_rewards(addr, _claim_rewards); integrate_checkpoint_of[addr] = now; } function user_checkpoint(address addr) virtual override external returns (bool) { _checkpoint(addr, true); return true; } function integrate_checkpoint() override external view returns (uint) { return now; } } c SExactGauge is LiquidityGauge, Configurable { using SafeMath for uint; using TransferHelper for address; bytes32 internal constant _devAddr_ = 'devAddr'; bytes32 internal constant _devRatio_ = 'devRatio'; bytes32 internal constant _ecoAddr_ = 'ecoAddr'; bytes32 internal constant _ecoRatio_ = 'ecoRatio'; bytes32 internal constant _claim_rewards_ = 'claim_rewards'; address override public minter; address override public crv_token; address override public lp_token; address override public controller; address override public voting_escrow; mapping(address => uint) override public balanceOf; uint override public totalSupply; uint override public future_epoch_time; // caller -> recipient -> can deposit? mapping(address => mapping(address => bool)) override public approved_to_deposit; mapping(address => uint) override public working_balances; uint override public working_supply; // The goal is to be able to calculate ∫(rate * balance / totalSupply dt) from 0 till checkpoint // All values are kept in units of being multiplied by 1e18 int128 override public period; uint256[100000000000000000000000000000] override public period_timestamp; // 1e18 * ∫(rate(t) / totalSupply(t) dt) from 0 till checkpoint uint256[100000000000000000000000000000] override public integrate_inv_supply; // bump epoch when rate() changes // 1e18 * ∫(rate(t) / totalSupply(t) dt) from (last_action) till checkpoint mapping(address => uint) override public integrate_inv_supply_of; mapping(address => uint) override public integrate_checkpoint_of; // ∫(balance * rate(t) / totalSupply(t) dt) from 0 till checkpoint // Units: rate * t = already number of coins per address to issue mapping(address => uint) override public integrate_fraction; uint override public inflation_rate; // For tracking external rewards address override public reward_contract; address override public rewarded_token; mapping(address => uint) public reward_integral_; // rewarded_token => reward_integral mapping(address => mapping(address => uint)) public reward_integral_for_; // recipient => rewarded_token => reward_integral_for mapping(address => mapping(address => uint)) public rewards_for_; mapping(address => mapping(address => uint)) public claimed_rewards_for_; uint public span; uint public end; mapping(address => uint) public sumMiningPerOf; uint public sumMiningPer; uint public bufReward; uint public lasttime; function initialize(address governor, address _minter, address _lp_token) public initializer { super.initialize(governor); minter = _minter; crv_token = Minter(_minter).token(); lp_token = _lp_token; IERC20(lp_token).totalSupply(); // just check } function setSpan(uint _span, bool isLinear) virtual external governance { span = _span; if(isLinear) end = now + _span; else end = 0; if(lasttime == 0) lasttime = now; } function kick(address addr) virtual override external { _checkpoint(addr, true); } function set_approve_deposit(address addr, bool can_deposit) virtual override external { approved_to_deposit[addr][msg.sender] = can_deposit; } function deposit(uint amount) virtual override external { deposit(amount, msg.sender); } function deposit(uint amount, address addr) virtual override public { require(addr == msg.sender || approved_to_deposit[msg.sender][addr], 'Not approved'); _checkpoint(addr, config[_claim_rewards_] == 0 ? false : true); _deposit(addr, amount); balanceOf[msg.sender] = balanceOf[msg.sender].add(amount); totalSupply = totalSupply.add(amount); emit Deposit(msg.sender, amount); } function _deposit(address addr, uint amount) virtual internal { lp_token.safeTransferFrom(addr, address(this), amount); } function withdraw() virtual external { withdraw(balanceOf[msg.sender]); } function withdraw(uint amount) virtual override public { withdraw(amount, config[_claim_rewards_] == 0 ? false : true); } function withdraw(uint amount, bool _claim_rewards) virtual override public { _checkpoint(msg.sender, _claim_rewards); totalSupply = totalSupply.sub(amount); balanceOf[msg.sender] = balanceOf[msg.sender].sub(amount); _withdraw(msg.sender, amount); emit Withdraw(msg.sender, amount); } function _withdraw(address to, uint amount) virtual internal { lp_token.safeTransfer(to, amount); } function claimable_reward(address addr) virtual override public view returns (uint) { addr; return 0; } function claim_rewards() virtual override public { return claim_rewards(msg.sender); } function claim_rewards(address) virtual override public { return; } function _checkpoint_rewards(address, bool) virtual internal { return; } function claimable_tokens(address addr) virtual override public view returns (uint r) { r = integrate_fraction[addr].sub(Minter(minter).minted(addr, address(this))); r = r.add(_claimable_last(addr, claimableDelta(), sumMiningPer, sumMiningPerOf[addr])); } function _claimable_last(address addr, uint delta, uint sumPer, uint lastSumPer) virtual internal view returns (uint amount) { if(span == 0 || totalSupply == 0) return 0; amount = sumPer.sub(lastSumPer); amount = amount.add(delta.mul(1 ether).div(totalSupply)); amount = amount.mul(balanceOf[addr]).div(1 ether); } function claimableDelta() virtual internal view returns(uint amount) { if(span == 0 || totalSupply == 0) return 0; amount = SMinter(minter).quotas(address(this)).sub(bufReward); if(end == 0) { // isNonLinear, endless if(now.sub(lasttime) < span) amount = amount.mul(now.sub(lasttime)).div(span); }else if(now < end) amount = amount.mul(now.sub(lasttime)).div(end.sub(lasttime)); else if(lasttime >= end) amount = 0; } function _checkpoint(address addr, uint amount) virtual internal { if(amount > 0) { integrate_fraction[addr] = integrate_fraction[addr].add(amount); addr = address(config[_devAddr_]); uint ratio = config[_devRatio_]; if(addr != address(0) && ratio != 0) integrate_fraction[addr] = integrate_fraction[addr].add(amount.mul(ratio).div(1 ether)); addr = address(config[_ecoAddr_]); ratio = config[_ecoRatio_]; if(addr != address(0) && ratio != 0) integrate_fraction[addr] = integrate_fraction[addr].add(amount.mul(ratio).div(1 ether)); } } function _checkpoint(address addr, bool _claim_rewards) virtual internal { if(span == 0 || totalSupply == 0) return; uint delta = claimableDelta(); uint amount = _claimable_last(addr, delta, sumMiningPer, sumMiningPerOf[addr]); if(delta != amount) bufReward = bufReward.add(delta).sub(amount); if(delta > 0) sumMiningPer = sumMiningPer.add(delta.mul(1 ether).div(totalSupply)); if(sumMiningPerOf[addr] != sumMiningPer) sumMiningPerOf[addr] = sumMiningPer; lasttime = now; _checkpoint(addr, amount); _checkpoint_rewards(addr, _claim_rewards); } function user_checkpoint(address addr) virtual override external returns (bool) { _checkpoint(addr, config[_claim_rewards_] == 0 ? false : true); return true; } function integrate_checkpoint() override external view returns (uint) { return lasttime; } function reward_integral() virtual override external view returns (uint) { return reward_integral_[rewarded_token]; } function reward_integral_for(address addr) virtual override external view returns (uint) { return reward_integral_for_[addr][rewarded_token]; } function rewards_for(address addr) virtual override external view returns (uint) { return rewards_for_[addr][rewarded_token]; } function claimed_rewards_for(address addr) virtual override external view returns (uint) { return claimed_rewards_for_[addr][rewarded_token]; } } contra uge is SExactGauge { address[] public rewards; //mapping(address => mapping(address =>uint)) internal sumRewardPerOf_; // recipient => rewarded_token => can sumRewardPerOf // obsolete, instead of reward_integral_ //mapping(address => uint) internal sumRewardPer_; // rewarded_token => can sumRewardPerOf // obsolete, instead of reward_integral_for_ function initialize(address governor, address _minter, address _lp_token, address _nestGauge, address[] memory _moreRewards) public initializer { super.initialize(governor, _minter, _lp_token); reward_contract = _nestGauge; rewarded_token = LiquidityGauge(_nestGauge).crv_token(); rewards = _moreRewards; rewards.push(rewarded_token); address rewarded_token2 = LiquidityGauge(_nestGauge).rewarded_token(); if(rewarded_token2 != address(0)) rewards.push(rewarded_token2); LiquidityGauge(_nestGauge).integrate_checkpoint(); // just check for(uint i=0; i<_moreRewards.length; i++) IERC20(_moreRewards[i]).totalSupply(); // just check } function _deposit(address from, uint amount) virtual override internal { super._deposit(from, amount); // lp_token.safeTransferFrom(from, address(this), amount); lp_token.safeApprove(reward_contract, amount); LiquidityGauge(reward_contract).deposit(amount); } function _withdraw(address to, uint amount) virtual override internal { LiquidityGauge(reward_contract).withdraw(amount); super._withdraw(to, amount); // lp_token.safeTransfer(to, amount); } function claim_rewards(address to) virtual override public { if(span == 0 || totalSupply == 0) return; _checkpoint_rewards(to, true); for(uint i=0; i<rewards.length; i++) { uint amount = rewards_for_[to][rewards[i]].sub(claimed_rewards_for_[to][rewards[i]]); if(amount > 0) { rewards[i].safeTransfer(to, amount); claimed_rewards_for_[to][rewards[i]] = rewards_for_[to][rewards[i]]; } } } function _checkpoint_rewards(address addr, bool _claim_rewards) virtual override internal { if(span == 0 || totalSupply == 0) return; uint[] memory drs = new uint[](rewards.length); if(_claim_rewards) { for(uint i=0; i<drs.length; i++) drs[i] = IERC20(rewards[i]).balanceOf(address(this)); Minter(LiquidityGauge(reward_contract).minter()).mint(reward_contract); LiquidityGauge(reward_contract).claim_rewards(); for(uint i=0; i<drs.length; i++) drs[i] = IERC20(rewards[i]).balanceOf(address(this)).sub(drs[i]); } for(uint i=0; i<drs.length; i++) { uint amount = _claimable_last(addr, drs[i], reward_integral_[rewards[i]], reward_integral_for_[addr][rewards[i]]); if(amount > 0) rewards_for_[addr][rewards[i]] = rewards_for_[addr][rewards[i]].add(amount); if(drs[i] > 0) reward_integral_[rewards[i]] = reward_integral_[rewards[i]].add(drs[i].mul(1 ether).div(totalSupply)); if(reward_integral_for_[addr][rewards[i]] != reward_integral_[rewards[i]]) reward_integral_for_[addr][rewards[i]] = reward_integral_[rewards[i]]; } } function claimable_reward(address addr) virtual override public view returns (uint r) { //uint delta = LiquidityGauge(reward_contract).claimable_tokens(address(this)); // Error: Mutable call in static context uint delta = LiquidityGauge(reward_contract).integrate_fraction(address(this)).sub(Minter(LiquidityGauge(reward_contract).minter()).minted(address(this), reward_contract)); r = _claimable_last(addr, delta, reward_integral_[rewarded_token], reward_integral_for_[addr][rewarded_token]); r = r.add(rewards_for_[addr][rewarded_token].sub(claimed_rewards_for_[addr][rewarded_token])); } function claimable_reward2(address addr) virtual public view returns (uint r) { uint delta = LiquidityGauge(reward_contract).claimable_reward(address(this)).sub(LiquidityGauge(reward_contract).claimed_rewards_for(address(this))); address reward2 = LiquidityGauge(reward_contract).rewarded_token(); r = _claimable_last(addr, delta, reward_integral_[reward2], reward_integral_for_[addr][reward2]); r = r.add(rewards_for_[addr][reward2].sub(claimed_rewards_for_[addr][reward2])); } function claimable_reward(address addr, address reward) virtual public view returns (uint r) { r = _claimable_last(addr, 0, reward_integral_[reward], reward_integral_for_[addr][reward]); r = r.add(rewards_for_[addr][reward].sub(claimed_rewards_for_[addr][reward])); } function claimed_rewards_for2(address addr) virtual public view returns (uint) { return claimed_rewards_for_[addr][LiquidityGauge(reward_contract).rewarded_token()]; } function rewards_for2(address addr) virtual public view returns (uint) { return rewards_for_[addr][LiquidityGauge(reward_contract).rewarded_token()]; } } contrac is Minter, Configurable { using SafeMath for uint; using Address for address payable; using TransferHelper for address; bytes32 internal constant _allowContract_ = 'allowContract'; bytes32 internal constant _allowlist_ = 'allowlist'; bytes32 internal constant _blocklist_ = 'blocklist'; address override public token; address override public controller; mapping(address => mapping(address => uint)) override public minted; // user => reward_contract => value mapping(address => mapping(address => bool)) override public allowed_to_mint_for; // minter => user => can mint? mapping(address => uint) public quotas; // reward_contract => quota; function initialize(address governor, address token_) public initializer { super.initialize(governor); token = token_; } function setGaugeQuota(address gauge, uint quota) public governance { quotas[gauge] = quota; } function mint(address gauge) virtual override public { mint_for(gauge, msg.sender); } function mint_many(address[8] calldata gauges) virtual override external { for(uint i=0; i<gauges.length; i++) mint(gauges[i]); } function mint_many(address[] calldata gauges) virtual external { for(uint i=0; i<gauges.length; i++) mint(gauges[i]); } function mint_for(address gauge, address _for) virtual override public { require(_for == msg.sender || allowed_to_mint_for[msg.sender][_for], 'Not approved'); require(quotas[gauge] > 0, 'No quota'); require(getConfig(_blocklist_, msg.sender) == 0, 'In blocklist'); bool isContract = msg.sender.isContract(); require(!isContract || config[_allowContract_] != 0 || getConfig(_allowlist_, msg.sender) != 0, 'No allowContract'); LiquidityGauge(gauge).user_checkpoint(_for); uint total_mint = LiquidityGauge(gauge).integrate_fraction(_for); uint to_mint = total_mint.sub(minted[_for][gauge]); if(to_mint != 0) { quotas[gauge] = quotas[gauge].sub(to_mint); token.safeTransfer(_for, to_mint); minted[_for][gauge] = total_mint; emit Minted(_for, gauge, total_mint); } } function toggle_approve_mint(address minting_user) virtual override external { allowed_to_mint_for[minting_user][msg.sender] = !allowed_to_mint_for[minting_user][msg.sender]; } } /* // he contract SStaking is IStakingRewards2, Configurable { using SafeMath for uint; using TransferHelper for address; address public minter; address public token; uint override public totalSupply; mapping(address => uint) override public balanceOf; mapping(address => uint) override public stakeTimeOf; mapping(address => uint) override public spendTimeOf; function initialize(address governor, address _minter) public initializer { super.initialize(governor); minter = _minter; token = Minter(_minter).token(); } function stake(uint256 amount) virtual override external { uint oldBalance = balanceOf[msg.sender]; uint newBalance = oldBalance.add(amount); stakeTimeOf[msg.sender] = now.sub(stakeAgeOf(msg.sender).mul(oldBalance).div(newBalance)); spendTimeOf[msg.sender] = now.sub(spendAgeOf(msg.sender).mul(oldBalance).div(newBalance)); token.safeTransferFrom(msg.sender, address(this), amount); balanceOf[msg.sender] = newBalance; totalSupply = totalSupply.add(amount); emit Staked(msg.sender, amount); } function withdraw(uint256 amount) virtual override public { totalSupply = totalSupply.sub(amount); balanceOf[msg.sender] = balanceOf[msg.sender].sub(amount); token.safeTransfer(msg.sender, amount); emit Withdrawn(msg.sender, amount); } function exit() virtual override external { withdraw(balanceOf[msg.sender]); getReward(); } function totalMinted() virtual override public view returns (uint) { return IERC20(token).totalSupply().sub(IERC20(token).balanceOf(minter)); } function weightOfGauge(address gauge) virtual override public view returns (uint) { return SMinter(minter).quotas(gauge).mul(1 ether).div(IERC20(token).balanceOf(minter)); } function stakingPerLPT(address gauge) virtual override external view returns (uint) { return totalMinted().mul(weightOfGauge(gauge)).div(LiquidityGauge(gauge).totalSupply()); } function stakeAgeOf(address account) virtual override public view returns (uint) { return now.sub(stakeTimeOf[account]); } function factorOf(address account) virtual override external view returns (uint) { uint age = stakeAgeOf(account); if(age <= 5 days) return age.mul(0.5 ether).div( 5 days).add(1.0 ether); else if(age <= 30 days) return age.sub( 5 days).mul(0.5 ether).div(25 days).add(1.5 ether); else if(age <= 80 days) return age.sub(30 days).mul(0.5 ether).div(50 days).add(2.0 ether); else return 2.5 ether; } function spendAgeOf(address account) virtual override public view returns (uint) { return now.sub(spendTimeOf[account]); } function coinAgeOf(address account) virtual override public view returns (uint) { return balanceOf[account].mul(spendAgeOf(account)); } function spendCoinAge(address account, uint coinAge) virtual override external returns (uint) { require(SMinter(minter).quotas(msg.sender) > 0, 'No quota'); if(coinAge > coinAgeOf(account)) coinAge = coinAgeOf(account); spendTimeOf[account] = now.sub(coinAgeOf(account).sub(coinAge).div(balanceOf[account])); emit SpentCoinAge(msg.sender, account, coinAge); return coinAge; } function lastTimeRewardApplicable() virtual override external view returns (uint256) {} // todo function rewardPerToken() virtual override external view returns (uint256) {} // todo function rewards(address account) virtual override external view returns (uint256) {} // todo function earned(address account) virtual override external view returns (uint256) {} // todo function getRewardForDuration() virtual override external view returns (uint256) {} // todo function getReward() virtual override public {} // todo } abstract contract Context { function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } function sqrt(uint x)public pure returns(uint y) { uint z = (x + 1) / 2; y = x; while (z < y) { y = z; z = (x / z + z) / 2; } } } library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // This method relies in extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. uint256 size; // solhint-disable-next-line no-inline-assembly assembly { size := extcodesize(account) } return size > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain`call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return _functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); return _functionCallWithValue(target, data, value, errorMessage); } function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) { require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: weiValue }(data); if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } contract ERC20 is Context, IERC20 { using SafeMath for uint256; using Address for address; mapping (address => uint256) public _balances; mapping (address => mapping (address => uint256)) internal _allowances; uint256 public _totalSupply; string internal _name; string internal _symbol; uint8 internal _decimals; /** * @dev Sets the values for {name} and {symbol}, initializes {decimals} with * a default value of 18. * * To select a different value for {decimals}, use {_setupDecimals}. * * All three of these values are immutable: they can only be set once during * construction. */ constructor (string memory name, string memory symbol) public { _name = name; _symbol = symbol; _decimals = 18; } /** * @dev Returns the name of the token. */ function name() public view returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5,05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is * called. * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view returns (uint8) { return _decimals; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view virtual override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view virtual override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `recipient` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address recipient, uint256 amount) public virtual override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { _approve(_msgSender(), spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}; * * Requirements: * - `sender` and `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. * - the caller must have allowance for ``sender``'s tokens of at least * `amount`. */ function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) { _transfer(sender, recipient, amount); _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance")); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue)); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero")); return true; } /** * @dev Moves tokens `amount` from `sender` to `recipient`. * * This is internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `sender` cannot be the zero address. * - `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. */ function _transfer(address sender, address recipient, uint256 amount) internal virtual { require(sender != address(0), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(sender, recipient, amount); _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance"); _balances[recipient] = _balances[recipient].add(amount); emit Transfer(sender, recipient, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements * * - `to` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply = _totalSupply.add(amount); _balances[account] = _balances[account].add(amount); emit Transfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance"); _totalSupply = _totalSupply.sub(amount); emit Transfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens. * * This is internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve(address owner, address spender, uint256 amount) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Sets {decimals} to a value other than the default one of 18. * * WARNING: This function should only be called from the constructor. Most * applications that interact with token contracts will not expect * {decimals} to ever change, and may work incorrectly if it does. */ function _setupDecimals(uint8 decimals_) internal { _decimals = decimals_; } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be to transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { } } contract SfgToken is ERC20 { constructor(address SfgFarm) ERC20("Stable Finance Governance Token", "SFG") public { uint8 decimals = 18; _setupDecimals(decimals); _mint(SfgFarm, 21000000 * 10 ** uint256(decimals)); // 100%, 21000000 } } contract SfyToken is ERC20 { constructor(address SfyFarm) ERC20("Stable Finance Yield Token", "SFY") public { uint8 decimals = 18; _setupDecimals(decimals); _mint(SfyFarm, 21000000 * 10 ** uint256(decimals)); // 100%, 21000000 } } library TransferHelper { function safeApprove(address token, address to, uint value) internal { // bytes4(keccak256(bytes('approve(address,uint256)'))); (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x095ea7b3, to, value)); require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: APPROVE_FAILED'); } function safeTransfer(address token, address to, uint value) internal { // bytes4(keccak256(bytes('transfer(address,uint256)'))); (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0xa9059cbb, to, value)); require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: TRANSFER_FAILED'); } function safeTransferFrom(address token, address from, address to, uint value) internal { // bytes4(keccak256(bytes('transferFrom(address,address,uint256)'))); (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x23b872dd, from, to, value)); require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: TRANSFER_FROM_FAILED'); } function safeTransferETH(address to, uint value) internal { (bool success,) = to.call{value:value}(new bytes(0)); require(success, 'TransferHelper: ETH_TRANSFER_FAILED'); } }

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{"success": true, "error": null, "results": {"detectors": [{"check": "unused-return", "impact": "Medium", "confidence": "Medium"}, {"check": "divide-before-multiply", "impact": "Medium", "confidence": "Medium"}, {"check": "incorrect-equality", "impact": "Medium", "confidence": "High"}, {"check": "reentrancy-no-eth", "impact": "Medium", "confidence": "Medium"}]}}

0x734279A9059dBB72CD3401983EF7F40F2ac6D3e9

pragma solidity 0.5.17; interface Curve { function get_virtual_price() external view returns (uint); } interface Yearn { function getPricePerFullShare() external view returns (uint); } interface UnderlyingToken { function decimals() external view returns (uint8); } interface Compound { function exchangeRateStored() external view returns (uint); function underlying() external view returns (address); } interface Cream { function exchangeRateStored() external view returns (uint); function underlying() external view returns (address); } contract Normalizer { using SafeMath for uint; address public governance; address public creamY; mapping(address => bool) public native; mapping(address => bool) public yearn; mapping(address => bool) public curve; mapping(address => address) public curveSwap; mapping(address => bool) public vaults; mapping(address => bool) public compound; mapping(address => bool) public cream; mapping(address => uint) public underlyingDecimals; constructor() public { governance = msg.sender; native[0xdAC17F958D2ee523a2206206994597C13D831ec7] = true; // USDT native[0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48] = true; // USDC native[0x4Fabb145d64652a948d72533023f6E7A623C7C53] = true; // BUSD native[0x0000000000085d4780B73119b644AE5ecd22b376] = true; // TUSD yearn[0xACd43E627e64355f1861cEC6d3a6688B31a6F952] = true; // vault yDAI yearn[0x37d19d1c4E1fa9DC47bD1eA12f742a0887eDa74a] = true; // vault yTUSD yearn[0x597aD1e0c13Bfe8025993D9e79C69E1c0233522e] = true; // vault yUSDC yearn[0x2f08119C6f07c006695E079AAFc638b8789FAf18] = true; // vault yUSDT yearn[0x16de59092dAE5CcF4A1E6439D611fd0653f0Bd01] = true; // yDAI yearn[0xd6aD7a6750A7593E092a9B218d66C0A814a3436e] = true; // yUSDC yearn[0x83f798e925BcD4017Eb265844FDDAbb448f1707D] = true; // yUSDT yearn[0x73a052500105205d34Daf004eAb301916DA8190f] = true; // yTUSD yearn[0xF61718057901F84C4eEC4339EF8f0D86D2B45600] = true; // ySUSD yearn[0xC2cB1040220768554cf699b0d863A3cd4324ce32] = true; // bDAI yearn[0x26EA744E5B887E5205727f55dFBE8685e3b21951] = true; // bUSDC yearn[0xE6354ed5bC4b393a5Aad09f21c46E101e692d447] = true; // bUSDT yearn[0x04bC0Ab673d88aE9dbC9DA2380cB6B79C4BCa9aE] = true; // bBUSD curve[0x845838DF265Dcd2c412A1Dc9e959c7d08537f8a2] = true; // cCompound curveSwap[0x845838DF265Dcd2c412A1Dc9e959c7d08537f8a2] = 0xA2B47E3D5c44877cca798226B7B8118F9BFb7A56; curve[0xdF5e0e81Dff6FAF3A7e52BA697820c5e32D806A8] = true; // cYearn curveSwap[0xdF5e0e81Dff6FAF3A7e52BA697820c5e32D806A8] = 0x45F783CCE6B7FF23B2ab2D70e416cdb7D6055f51; curve[0x3B3Ac5386837Dc563660FB6a0937DFAa5924333B] = true; // cBUSD curveSwap[0x3B3Ac5386837Dc563660FB6a0937DFAa5924333B] = 0x79a8C46DeA5aDa233ABaFFD40F3A0A2B1e5A4F27; curve[0xC25a3A3b969415c80451098fa907EC722572917F] = true; // cSUSD curveSwap[0xC25a3A3b969415c80451098fa907EC722572917F] = 0xA5407eAE9Ba41422680e2e00537571bcC53efBfD; curve[0xD905e2eaeBe188fc92179b6350807D8bd91Db0D8] = true; // cPAX curveSwap[0xD905e2eaeBe188fc92179b6350807D8bd91Db0D8] = 0x06364f10B501e868329afBc005b3492902d6C763; compound[0x5d3a536E4D6DbD6114cc1Ead35777bAB948E3643] = true; // cDAI underlyingDecimals[0x5d3a536E4D6DbD6114cc1Ead35777bAB948E3643] = 1e18; compound[0x39AA39c021dfbaE8faC545936693aC917d5E7563] = true; // cUSDC underlyingDecimals[0x39AA39c021dfbaE8faC545936693aC917d5E7563] = 1e6; compound[0xf650C3d88D12dB855b8bf7D11Be6C55A4e07dCC9] = true; // cUSDT underlyingDecimals[0xf650C3d88D12dB855b8bf7D11Be6C55A4e07dCC9] = 1e6; cream[0x44fbeBd2F576670a6C33f6Fc0B00aA8c5753b322] = true; // crUSDC underlyingDecimals[0x44fbeBd2F576670a6C33f6Fc0B00aA8c5753b322] = 1e6; cream[0x797AAB1ce7c01eB727ab980762bA88e7133d2157] = true; // crUSDT underlyingDecimals[0x797AAB1ce7c01eB727ab980762bA88e7133d2157] = 1e6; cream[0x1FF8CDB51219a8838b52E9cAc09b71e591BC998e] = true; // crBUSD underlyingDecimals[0x1FF8CDB51219a8838b52E9cAc09b71e591BC998e] = 1e18; } function setGovernance(address _governance) external { require(msg.sender == governance, "!governance"); governance = _governance; } function setCreamY(address _creamY) external { require(msg.sender == governance, "!governance"); creamY = _creamY; } function getPrice(address token) external view returns (uint) { if (native[token] || token == creamY) { return 1e18; } else if (yearn[token]) { return Yearn(token).getPricePerFullShare(); } else if (curve[token]) { return Curve(curveSwap[token]).get_virtual_price(); } else if (compound[token]) { return getCompoundPrice(token); } else if (cream[token]) { return getCreamPrice(token); } else { return uint(0); } } function getCompoundPrice(address token) public view returns (uint) { address underlying = Compound(token).underlying(); uint8 decimals = UnderlyingToken(underlying).decimals(); return Compound(token).exchangeRateStored().mul(1e8).div(uint(10) ** decimals); } function getCreamPrice(address token) public view returns (uint) { address underlying = Cream(token).underlying(); uint8 decimals = UnderlyingToken(underlying).decimals(); return Cream(token).exchangeRateStored().mul(1e8).div(uint(10) ** decimals); } } library SafeMath { function add(uint a, uint b) internal pure returns (uint) { uint c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } function sub(uint a, uint b) internal pure returns (uint) { return sub(a, b, "SafeMath: subtraction overflow"); } function sub(uint a, uint b, string memory errorMessage) internal pure returns (uint) { require(b <= a, errorMessage); uint c = a - b; return c; } function mul(uint a, uint b) internal pure returns (uint) { if (a == 0) { return 0; } uint c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } function div(uint a, uint b) internal pure returns (uint) { return div(a, b, "SafeMath: division by zero"); } function div(uint a, uint b, string memory errorMessage) internal pure returns (uint) { // Solidity only automatically asserts when dividing by 0 require(b > 0, errorMessage); uint c = a / b; return c; } function divCeil(uint256 a, uint256 b) internal pure returns (uint256) { require(b > 0); uint256 c = a / b; if(a % b != 0) c = c + 1; return c; } }

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{"success": true, "error": null, "results": {}}

0x7342d1165bbcc831b161af91acd4f41d633ac287

pragma solidity 0.6.12; interface RewardPool { function df() external returns (address); function stake(uint) external; function withdraw(uint) external; function getReward() external; function earned(address) external view returns (uint); } contract Initializable { /** * @dev Indicates that the contract has been initialized. */ bool private initialized; /** * @dev Indicates that the contract is in the process of being initialized. */ bool private initializing; /** * @dev Modifier to use in the initializer function of a contract. */ modifier initializer() { require(initializing || isConstructor() || !initialized, "Contract instance has already been initialized"); bool isTopLevelCall = !initializing; if (isTopLevelCall) { initializing = true; initialized = true; } _; if (isTopLevelCall) { initializing = false; } } /** * @dev Modifier to use in the initializer function of a contract when upgrade EVEN times. */ modifier initializerEven() { require(initializing || isConstructor() || initialized, "Contract instance has already been initialized EVEN times"); bool isTopLevelCall = !initializing; if (isTopLevelCall) { initializing = true; initialized = false; } _; if (isTopLevelCall) { initializing = false; } } /// @dev Returns true if and only if the function is running in the constructor function isConstructor() private view returns (bool) { // extcodesize checks the size of the code stored in an address, and // address returns the current address. Since the code is still not // deployed when running a constructor, any checks on its code size will // yield zero, making it an effective way to detect if a contract is // under construction or not. address self = address(this); uint256 cs; assembly { cs := extcodesize(self) } return cs == 0; } // Reserved storage space to allow for layout changes in the future. uint256[50] private ______gap; } contract Governable is Initializable { address public governor; event GovernorshipTransferred(address indexed previousGovernor, address indexed newGovernor); /** * @dev Contract initializer. * called once by the factory at time of deployment */ function initialize(address governor_) virtual public initializer { governor = governor_; emit GovernorshipTransferred(address(0), governor); } modifier governance() { require(msg.sender == governor); _; } /** * @dev Allows the current governor to relinquish control of the contract. * @notice Renouncing to governorship will leave the contract without an governor. * It will not be possible to call the functions with the `governance` * modifier anymore. */ function renounceGovernorship() public governance { emit GovernorshipTransferred(governor, address(0)); governor = address(0); } /** * @dev Allows the current governor to transfer control of the contract to a newGovernor. * @param newGovernor The address to transfer governorship to. */ function transferGovernorship(address newGovernor) public governance { _transferGovernorship(newGovernor); } /** * @dev Transfers control of the contract to a newGovernor. * @param newGovernor The address to transfer governorship to. */ function _transferGovernorship(address newGovernor) internal { require(newGovernor != address(0)); emit GovernorshipTransferred(governor, newGovernor); governor = newGovernor; } } contract Configurable is Governable { mapping (bytes32 => uint) internal config; function getConfig(bytes32 key) public view returns (uint) { return config[key]; } function getConfig(bytes32 key, uint index) public view returns (uint) { return config[bytes32(uint(key) ^ index)]; } function getConfig(bytes32 key, address addr) public view returns (uint) { return config[bytes32(uint(key) ^ uint(addr))]; } function _setConfig(bytes32 key, uint value) internal { if(config[key] != value) config[key] = value; } function _setConfig(bytes32 key, uint index, uint value) internal { _setConfig(bytes32(uint(key) ^ index), value); } function _setConfig(bytes32 key, address addr, uint value) internal { _setConfig(bytes32(uint(key) ^ uint(addr)), value); } function setConfig(bytes32 key, uint value) external governance { _setConfig(key, value); } function setConfig(bytes32 key, uint index, uint value) external governance { _setConfig(bytes32(uint(key) ^ index), value); } function setConfig(bytes32 key, address addr, uint value) external governance { _setConfig(bytes32(uint(key) ^ uint(addr)), value); } } interface Minter { event Minted(address indexed recipient, address reward_contract, uint minted); function token() external view returns (address); function controller() external view returns (address); function minted(address, address) external view returns (uint); function allowed_to_mint_for(address, address) external view returns (bool); function mint(address gauge) external; function mint_many(address[8] calldata gauges) external; function mint_for(address gauge, address _for) external; function toggle_approve_mint(address minting_user) external; } interface LiquidityGauge { event Deposit(address indexed provider, uint value); event Withdraw(address indexed provider, uint value); event UpdateLiquidityLimit(address user, uint original_balance, uint original_supply, uint working_balance, uint working_supply); function user_checkpoint (address addr) external returns (bool); function claimable_tokens(address addr) external view returns (uint); function claimable_reward(address addr) external view returns (uint); function integrate_checkpoint() external view returns (uint); function kick(address addr) external; function set_approve_deposit(address addr, bool can_deposit) external; function deposit(uint _value) external; function deposit(uint _value, address addr) external; function withdraw(uint _value) external; function withdraw(uint _value, bool claim_rewards) external; function claim_rewards() external; function claim_rewards(address addr) external; function minter() external view returns (address); function crv_token() external view returns (address); function lp_token() external view returns (address); function controller() external view returns (address); function voting_escrow() external view returns (address); function balanceOf(address) external view returns (uint); function totalSupply() external view returns (uint); function future_epoch_time() external view returns (uint); function approved_to_deposit(address, address) external view returns (bool); function working_balances(address) external view returns (uint); function working_supply() external view returns (uint); function period() external view returns (int128); function period_timestamp(uint) external view returns (uint); function integrate_inv_supply(uint) external view returns (uint); function integrate_inv_supply_of(address) external view returns (uint); function integrate_checkpoint_of(address) external view returns (uint); function integrate_fraction(address) external view returns (uint); function inflation_rate() external view returns (uint); function reward_contract() external view returns (address); function rewarded_token() external view returns (address); function reward_integral() external view returns (uint); function reward_integral_for(address) external view returns (uint); function rewards_for(address) external view returns (uint); function claimed_rewards_for(address) external view returns (uint); } contract SSimpleGauge is LiquidityGauge, Configurable { using SafeMath for uint; using TransferHelper for address; address override public minter; address override public crv_token; address override public lp_token; address override public controller; address override public voting_escrow; mapping(address => uint) override public balanceOf; uint override public totalSupply; uint override public future_epoch_time; // caller -> recipient -> can deposit? mapping(address => mapping(address => bool)) override public approved_to_deposit; mapping(address => uint) override public working_balances; uint override public working_supply; // The goal is to be able to calculate ∫(rate * balance / totalSupply dt) from 0 till checkpoint // All values are kept in units of being multiplied by 1e18 int128 override public period; uint256[100000000000000000000000000000] override public period_timestamp; // 1e18 * ∫(rate(t) / totalSupply(t) dt) from 0 till checkpoint uint256[100000000000000000000000000000] override public integrate_inv_supply; // bump epoch when rate() changes // 1e18 * ∫(rate(t) / totalSupply(t) dt) from (last_action) till checkpoint mapping(address => uint) override public integrate_inv_supply_of; mapping(address => uint) override public integrate_checkpoint_of; // ∫(balance * rate(t) / totalSupply(t) dt) from 0 till checkpoint // Units: rate * t = already number of coins per address to issue mapping(address => uint) override public integrate_fraction; uint override public inflation_rate; // For tracking external rewards address override public reward_contract; address override public rewarded_token; uint override public reward_integral; mapping(address => uint) override public reward_integral_for; mapping(address => uint) override public rewards_for; mapping(address => uint) override public claimed_rewards_for; uint public span; uint public end; function initialize(address governor, address _minter, address _lp_token) public initializer { super.initialize(governor); minter = _minter; crv_token = Minter(_minter).token(); lp_token = _lp_token; IERC20(lp_token).totalSupply(); // just check } function setSpan(uint _span, bool isLinear) virtual external governance { span = _span; if(isLinear) end = now + _span; else end = 0; } function kick(address addr) virtual override external { _checkpoint(addr, true); } function set_approve_deposit(address addr, bool can_deposit) virtual override external { approved_to_deposit[addr][msg.sender] = can_deposit; } function deposit(uint amount) virtual override external { deposit(amount, msg.sender); } function deposit(uint amount, address addr) virtual override public { require(addr == msg.sender || approved_to_deposit[msg.sender][addr], 'Not approved'); _checkpoint(addr, true); _deposit(addr, amount); balanceOf[addr] = balanceOf[addr].add(amount); totalSupply = totalSupply.add(amount); emit Deposit(addr, amount); } function _deposit(address addr, uint amount) virtual internal { lp_token.safeTransferFrom(addr, address(this), amount); } function withdraw() virtual external { withdraw(balanceOf[msg.sender], true); } function withdraw(uint amount) virtual override external { withdraw(amount, true); } function withdraw(uint amount, bool claim_rewards) virtual override public { _checkpoint(msg.sender, claim_rewards); totalSupply = totalSupply.sub(amount); balanceOf[msg.sender] = balanceOf[msg.sender].sub(amount); _withdraw(msg.sender, amount); emit Withdraw(msg.sender, amount); } function _withdraw(address to, uint amount) virtual internal { lp_token.safeTransfer(to, amount); } function claimable_reward(address) virtual override public view returns (uint) { return 0; } function claim_rewards() virtual override public { return claim_rewards(msg.sender); } function claim_rewards(address) virtual override public { return; } function _checkpoint_rewards(address, bool) virtual internal { return; } function claimable_tokens(address addr) virtual override public view returns (uint amount) { if(span == 0 || totalSupply == 0) return 0; amount = SMinter(minter).quotas(address(this)); amount = amount.mul(balanceOf[addr]).div(totalSupply); uint lasttime = integrate_checkpoint_of[addr]; if(end == 0) { // isNonLinear, endless if(now.sub(lasttime) < span) amount = amount.mul(now.sub(lasttime)).div(span); }else if(now < end) amount = amount.mul(now.sub(lasttime)).div(end.sub(lasttime)); else if(lasttime >= end) amount = 0; } function _checkpoint(address addr, uint amount) virtual internal { if(amount > 0) { integrate_fraction[addr] = integrate_fraction[addr].add(amount); address teamAddr = address(config['teamAddr']); uint teamRatio = config['teamRatio']; if(teamAddr != address(0) && teamRatio != 0) integrate_fraction[teamAddr] = integrate_fraction[teamAddr].add(amount.mul(teamRatio).div(1 ether)); } } function _checkpoint(address addr, bool _claim_rewards) virtual internal { uint amount = claimable_tokens(addr); _checkpoint(addr, amount); _checkpoint_rewards(addr, _claim_rewards); integrate_checkpoint_of[addr] = now; } function user_checkpoint(address addr) virtual override external returns (bool) { _checkpoint(addr, true); return true; } function integrate_checkpoint() override external view returns (uint) { return now; } } c SExactGauge is LiquidityGauge, Configurable { using SafeMath for uint; using TransferHelper for address; bytes32 internal constant _devAddr_ = 'devAddr'; bytes32 internal constant _devRatio_ = 'devRatio'; bytes32 internal constant _ecoAddr_ = 'ecoAddr'; bytes32 internal constant _ecoRatio_ = 'ecoRatio'; bytes32 internal constant _claim_rewards_ = 'claim_rewards'; address override public minter; address override public crv_token; address override public lp_token; address override public controller; address override public voting_escrow; mapping(address => uint) override public balanceOf; uint override public totalSupply; uint override public future_epoch_time; // caller -> recipient -> can deposit? mapping(address => mapping(address => bool)) override public approved_to_deposit; mapping(address => uint) override public working_balances; uint override public working_supply; // The goal is to be able to calculate ∫(rate * balance / totalSupply dt) from 0 till checkpoint // All values are kept in units of being multiplied by 1e18 int128 override public period; uint256[100000000000000000000000000000] override public period_timestamp; // 1e18 * ∫(rate(t) / totalSupply(t) dt) from 0 till checkpoint uint256[100000000000000000000000000000] override public integrate_inv_supply; // bump epoch when rate() changes // 1e18 * ∫(rate(t) / totalSupply(t) dt) from (last_action) till checkpoint mapping(address => uint) override public integrate_inv_supply_of; mapping(address => uint) override public integrate_checkpoint_of; // ∫(balance * rate(t) / totalSupply(t) dt) from 0 till checkpoint // Units: rate * t = already number of coins per address to issue mapping(address => uint) override public integrate_fraction; uint override public inflation_rate; // For tracking external rewards address override public reward_contract; address override public rewarded_token; mapping(address => uint) public reward_integral_; // rewarded_token => reward_integral mapping(address => mapping(address => uint)) public reward_integral_for_; // recipient => rewarded_token => reward_integral_for mapping(address => mapping(address => uint)) public rewards_for_; mapping(address => mapping(address => uint)) public claimed_rewards_for_; uint public span; uint public end; mapping(address => uint) public sumMiningPerOf; uint public sumMiningPer; uint public bufReward; uint public lasttime; function initialize(address governor, address _minter, address _lp_token) public initializer { super.initialize(governor); minter = _minter; crv_token = Minter(_minter).token(); lp_token = _lp_token; IERC20(lp_token).totalSupply(); // just check } function setSpan(uint _span, bool isLinear) virtual external governance { span = _span; if(isLinear) end = now + _span; else end = 0; if(lasttime == 0) lasttime = now; } function kick(address addr) virtual override external { _checkpoint(addr, true); } function set_approve_deposit(address addr, bool can_deposit) virtual override external { approved_to_deposit[addr][msg.sender] = can_deposit; } function deposit(uint amount) virtual override external { deposit(amount, msg.sender); } function deposit(uint amount, address addr) virtual override public { require(addr == msg.sender || approved_to_deposit[msg.sender][addr], 'Not approved'); _checkpoint(addr, config[_claim_rewards_] == 0 ? false : true); _deposit(addr, amount); balanceOf[msg.sender] = balanceOf[msg.sender].add(amount); totalSupply = totalSupply.add(amount); emit Deposit(msg.sender, amount); } function _deposit(address addr, uint amount) virtual internal { lp_token.safeTransferFrom(addr, address(this), amount); } function withdraw() virtual external { withdraw(balanceOf[msg.sender]); } function withdraw(uint amount) virtual override public { withdraw(amount, config[_claim_rewards_] == 0 ? false : true); } function withdraw(uint amount, bool _claim_rewards) virtual override public { _checkpoint(msg.sender, _claim_rewards); totalSupply = totalSupply.sub(amount); balanceOf[msg.sender] = balanceOf[msg.sender].sub(amount); _withdraw(msg.sender, amount); emit Withdraw(msg.sender, amount); } function _withdraw(address to, uint amount) virtual internal { lp_token.safeTransfer(to, amount); } function claimable_reward(address addr) virtual override public view returns (uint) { addr; return 0; } function claim_rewards() virtual override public { return claim_rewards(msg.sender); } function claim_rewards(address) virtual override public { return; } function _checkpoint_rewards(address, bool) virtual internal { return; } function claimable_tokens(address addr) virtual override public view returns (uint r) { r = integrate_fraction[addr].sub(Minter(minter).minted(addr, address(this))); r = r.add(_claimable_last(addr, claimableDelta(), sumMiningPer, sumMiningPerOf[addr])); } function _claimable_last(address addr, uint delta, uint sumPer, uint lastSumPer) virtual internal view returns (uint amount) { if(span == 0 || totalSupply == 0) return 0; amount = sumPer.sub(lastSumPer); amount = amount.add(delta.mul(1 ether).div(totalSupply)); amount = amount.mul(balanceOf[addr]).div(1 ether); } function claimableDelta() virtual internal view returns(uint amount) { if(span == 0 || totalSupply == 0) return 0; amount = SMinter(minter).quotas(address(this)).sub(bufReward); if(end == 0) { // isNonLinear, endless if(now.sub(lasttime) < span) amount = amount.mul(now.sub(lasttime)).div(span); }else if(now < end) amount = amount.mul(now.sub(lasttime)).div(end.sub(lasttime)); else if(lasttime >= end) amount = 0; } function _checkpoint(address addr, uint amount) virtual internal { if(amount > 0) { integrate_fraction[addr] = integrate_fraction[addr].add(amount); addr = address(config[_devAddr_]); uint ratio = config[_devRatio_]; if(addr != address(0) && ratio != 0) integrate_fraction[addr] = integrate_fraction[addr].add(amount.mul(ratio).div(1 ether)); addr = address(config[_ecoAddr_]); ratio = config[_ecoRatio_]; if(addr != address(0) && ratio != 0) integrate_fraction[addr] = integrate_fraction[addr].add(amount.mul(ratio).div(1 ether)); } } function _checkpoint(address addr, bool _claim_rewards) virtual internal { if(span == 0 || totalSupply == 0) return; uint delta = claimableDelta(); uint amount = _claimable_last(addr, delta, sumMiningPer, sumMiningPerOf[addr]); if(delta != amount) bufReward = bufReward.add(delta).sub(amount); if(delta > 0) sumMiningPer = sumMiningPer.add(delta.mul(1 ether).div(totalSupply)); if(sumMiningPerOf[addr] != sumMiningPer) sumMiningPerOf[addr] = sumMiningPer; lasttime = now; _checkpoint(addr, amount); _checkpoint_rewards(addr, _claim_rewards); } function user_checkpoint(address addr) virtual override external returns (bool) { _checkpoint(addr, config[_claim_rewards_] == 0 ? false : true); return true; } function integrate_checkpoint() override external view returns (uint) { return lasttime; } function reward_integral() virtual override external view returns (uint) { return reward_integral_[rewarded_token]; } function reward_integral_for(address addr) virtual override external view returns (uint) { return reward_integral_for_[addr][rewarded_token]; } function rewards_for(address addr) virtual override external view returns (uint) { return rewards_for_[addr][rewarded_token]; } function claimed_rewards_for(address addr) virtual override external view returns (uint) { return claimed_rewards_for_[addr][rewarded_token]; } } contra uge is SExactGauge { address[] public rewards; //mapping(address => mapping(address =>uint)) internal sumRewardPerOf_; // recipient => rewarded_token => can sumRewardPerOf // obsolete, instead of reward_integral_ //mapping(address => uint) internal sumRewardPer_; // rewarded_token => can sumRewardPerOf // obsolete, instead of reward_integral_for_ function initialize(address governor, address _minter, address _lp_token, address _nestGauge, address[] memory _moreRewards) public initializer { super.initialize(governor, _minter, _lp_token); reward_contract = _nestGauge; rewarded_token = LiquidityGauge(_nestGauge).crv_token(); rewards = _moreRewards; rewards.push(rewarded_token); address rewarded_token2 = LiquidityGauge(_nestGauge).rewarded_token(); if(rewarded_token2 != address(0)) rewards.push(rewarded_token2); LiquidityGauge(_nestGauge).integrate_checkpoint(); // just check for(uint i=0; i<_moreRewards.length; i++) IERC20(_moreRewards[i]).totalSupply(); // just check } function _deposit(address from, uint amount) virtual override internal { super._deposit(from, amount); // lp_token.safeTransferFrom(from, address(this), amount); lp_token.safeApprove(reward_contract, amount); LiquidityGauge(reward_contract).deposit(amount); } function _withdraw(address to, uint amount) virtual override internal { LiquidityGauge(reward_contract).withdraw(amount); super._withdraw(to, amount); // lp_token.safeTransfer(to, amount); } function claim_rewards(address to) virtual override public { if(span == 0 || totalSupply == 0) return; _checkpoint_rewards(to, true); for(uint i=0; i<rewards.length; i++) { uint amount = rewards_for_[to][rewards[i]].sub(claimed_rewards_for_[to][rewards[i]]); if(amount > 0) { rewards[i].safeTransfer(to, amount); claimed_rewards_for_[to][rewards[i]] = rewards_for_[to][rewards[i]]; } } } function _checkpoint_rewards(address addr, bool _claim_rewards) virtual override internal { if(span == 0 || totalSupply == 0) return; uint[] memory drs = new uint[](rewards.length); if(_claim_rewards) { for(uint i=0; i<drs.length; i++) drs[i] = IERC20(rewards[i]).balanceOf(address(this)); Minter(LiquidityGauge(reward_contract).minter()).mint(reward_contract); LiquidityGauge(reward_contract).claim_rewards(); for(uint i=0; i<drs.length; i++) drs[i] = IERC20(rewards[i]).balanceOf(address(this)).sub(drs[i]); } for(uint i=0; i<drs.length; i++) { uint amount = _claimable_last(addr, drs[i], reward_integral_[rewards[i]], reward_integral_for_[addr][rewards[i]]); if(amount > 0) rewards_for_[addr][rewards[i]] = rewards_for_[addr][rewards[i]].add(amount); if(drs[i] > 0) reward_integral_[rewards[i]] = reward_integral_[rewards[i]].add(drs[i].mul(1 ether).div(totalSupply)); if(reward_integral_for_[addr][rewards[i]] != reward_integral_[rewards[i]]) reward_integral_for_[addr][rewards[i]] = reward_integral_[rewards[i]]; } } function claimable_reward(address addr) virtual override public view returns (uint r) { //uint delta = LiquidityGauge(reward_contract).claimable_tokens(address(this)); // Error: Mutable call in static context uint delta = LiquidityGauge(reward_contract).integrate_fraction(address(this)).sub(Minter(LiquidityGauge(reward_contract).minter()).minted(address(this), reward_contract)); r = _claimable_last(addr, delta, reward_integral_[rewarded_token], reward_integral_for_[addr][rewarded_token]); r = r.add(rewards_for_[addr][rewarded_token].sub(claimed_rewards_for_[addr][rewarded_token])); } function claimable_reward2(address addr) virtual public view returns (uint r) { uint delta = LiquidityGauge(reward_contract).claimable_reward(address(this)).sub(LiquidityGauge(reward_contract).claimed_rewards_for(address(this))); address reward2 = LiquidityGauge(reward_contract).rewarded_token(); r = _claimable_last(addr, delta, reward_integral_[reward2], reward_integral_for_[addr][reward2]); r = r.add(rewards_for_[addr][reward2].sub(claimed_rewards_for_[addr][reward2])); } function claimable_reward(address addr, address reward) virtual public view returns (uint r) { r = _claimable_last(addr, 0, reward_integral_[reward], reward_integral_for_[addr][reward]); r = r.add(rewards_for_[addr][reward].sub(claimed_rewards_for_[addr][reward])); } function claimed_rewards_for2(address addr) virtual public view returns (uint) { return claimed_rewards_for_[addr][LiquidityGauge(reward_contract).rewarded_token()]; } function rewards_for2(address addr) virtual public view returns (uint) { return rewards_for_[addr][LiquidityGauge(reward_contract).rewarded_token()]; } } contrac is Minter, Configurable { using SafeMath for uint; using Address for address payable; using TransferHelper for address; bytes32 internal constant _allowContract_ = 'allowContract'; bytes32 internal constant _allowlist_ = 'allowlist'; bytes32 internal constant _blocklist_ = 'blocklist'; address override public token; address override public controller; mapping(address => mapping(address => uint)) override public minted; // user => reward_contract => value mapping(address => mapping(address => bool)) override public allowed_to_mint_for; // minter => user => can mint? mapping(address => uint) public quotas; // reward_contract => quota; function initialize(address governor, address token_) public initializer { super.initialize(governor); token = token_; } function setGaugeQuota(address gauge, uint quota) public governance { quotas[gauge] = quota; } function mint(address gauge) virtual override public { mint_for(gauge, msg.sender); } function mint_many(address[8] calldata gauges) virtual override external { for(uint i=0; i<gauges.length; i++) mint(gauges[i]); } function mint_many(address[] calldata gauges) virtual external { for(uint i=0; i<gauges.length; i++) mint(gauges[i]); } function mint_for(address gauge, address _for) virtual override public { require(_for == msg.sender || allowed_to_mint_for[msg.sender][_for], 'Not approved'); require(quotas[gauge] > 0, 'No quota'); require(getConfig(_blocklist_, msg.sender) == 0, 'In blocklist'); bool isContract = msg.sender.isContract(); require(!isContract || config[_allowContract_] != 0 || getConfig(_allowlist_, msg.sender) != 0, 'No allowContract'); LiquidityGauge(gauge).user_checkpoint(_for); uint total_mint = LiquidityGauge(gauge).integrate_fraction(_for); uint to_mint = total_mint.sub(minted[_for][gauge]); if(to_mint != 0) { quotas[gauge] = quotas[gauge].sub(to_mint); token.safeTransfer(_for, to_mint); minted[_for][gauge] = total_mint; emit Minted(_for, gauge, total_mint); } } function toggle_approve_mint(address minting_user) virtual override external { allowed_to_mint_for[minting_user][msg.sender] = !allowed_to_mint_for[minting_user][msg.sender]; } } /* // he abstract contract Context { function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } function sqrt(uint x)public pure returns(uint y) { uint z = (x + 1) / 2; y = x; while (z < y) { y = z; z = (x / z + z) / 2; } } } library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // This method relies in extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. uint256 size; // solhint-disable-next-line no-inline-assembly assembly { size := extcodesize(account) } return size > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain`call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return _functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); return _functionCallWithValue(target, data, value, errorMessage); } function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) { require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: weiValue }(data); if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } contract ERC20 is Context, IERC20 { using SafeMath for uint256; using Address for address; mapping (address => uint256) public _balances; mapping (address => mapping (address => uint256)) internal _allowances; uint256 public _totalSupply; string internal _name; string internal _symbol; uint8 internal _decimals; /** * @dev Sets the values for {name} and {symbol}, initializes {decimals} with * a default value of 18. * * To select a different value for {decimals}, use {_setupDecimals}. * * All three of these values are immutable: they can only be set once during * construction. */ constructor (string memory name, string memory symbol) public { _name = name; _symbol = symbol; _decimals = 18; } /** * @dev Returns the name of the token. */ function name() public view returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5,05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is * called. * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view returns (uint8) { return _decimals; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view virtual override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view virtual override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `recipient` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address recipient, uint256 amount) public virtual override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { _approve(_msgSender(), spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}; * * Requirements: * - `sender` and `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. * - the caller must have allowance for ``sender``'s tokens of at least * `amount`. */ function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) { _transfer(sender, recipient, amount); _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance")); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue)); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero")); return true; } /** * @dev Moves tokens `amount` from `sender` to `recipient`. * * This is internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `sender` cannot be the zero address. * - `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. */ function _transfer(address sender, address recipient, uint256 amount) internal virtual { require(sender != address(0), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(sender, recipient, amount); _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance"); _balances[recipient] = _balances[recipient].add(amount); emit Transfer(sender, recipient, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements * * - `to` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply = _totalSupply.add(amount); _balances[account] = _balances[account].add(amount); emit Transfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance"); _totalSupply = _totalSupply.sub(amount); emit Transfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens. * * This is internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve(address owner, address spender, uint256 amount) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Sets {decimals} to a value other than the default one of 18. * * WARNING: This function should only be called from the constructor. Most * applications that interact with token contracts will not expect * {decimals} to ever change, and may work incorrectly if it does. */ function _setupDecimals(uint8 decimals_) internal { _decimals = decimals_; } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be to transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { } } contract SfgToken is ERC20 { constructor(address SfgFarm) ERC20("Stable Finance Governance Token", "SFG") public { uint8 decimals = 18; _setupDecimals(decimals); _mint(SfgFarm, 21000000 * 10 ** uint256(decimals)); // 100%, 21000000 } } contract SfyToken is ERC20 { constructor(address SfyFarm) ERC20("Stable Finance Yield Token", "SFY") public { uint8 decimals = 18; _setupDecimals(decimals); _mint(SfyFarm, 21000000 * 10 ** uint256(decimals)); // 100%, 21000000 } } library TransferHelper { function safeApprove(address token, address to, uint value) internal { // bytes4(keccak256(bytes('approve(address,uint256)'))); (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x095ea7b3, to, value)); require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: APPROVE_FAILED'); } function safeTransfer(address token, address to, uint value) internal { // bytes4(keccak256(bytes('transfer(address,uint256)'))); (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0xa9059cbb, to, value)); require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: TRANSFER_FAILED'); } function safeTransferFrom(address token, address from, address to, uint value) internal { // bytes4(keccak256(bytes('transferFrom(address,address,uint256)'))); (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x23b872dd, from, to, value)); require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: TRANSFER_FROM_FAILED'); } function safeTransferETH(address to, uint value) internal { (bool success,) = to.call{value:value}(new bytes(0)); require(success, 'TransferHelper: ETH_TRANSFER_FAILED'); } } contract DoubleGauge is SExactGauge { function initialize(address governor, address _minter, address _lp_token, address rewardPool) public initializer { super.initialize(governor, _minter, _lp_token); reward_contract = rewardPool; rewarded_token = RewardPool(rewardPool).df(); } function _deposit(address from, uint amount) virtual override internal { super._deposit(from, amount); // lp_token.safeTransferFrom(from, address(this), amount); lp_token.safeApprove(reward_contract, amount); RewardPool(reward_contract).stake(amount); } function _withdraw(address to, uint amount) virtual override internal { RewardPool(reward_contract).withdraw(amount); super._withdraw(to, amount); // lp_token.safeTransfer(to, amount); } function claim_rewards(address to) virtual override public { if(span == 0 || totalSupply == 0) return; _checkpoint_rewards(to, true); uint amount = rewards_for_[to][rewarded_token].sub(claimed_rewards_for_[to][rewarded_token]); if(amount > 0) { rewarded_token.safeTransfer(to, amount); claimed_rewards_for_[to][rewarded_token] = rewards_for_[to][rewarded_token]; } } function _checkpoint_rewards(address addr, bool _claim_rewards) virtual override internal { if(span == 0 || totalSupply == 0) return; uint dr = 0; if(_claim_rewards) { dr = IERC20(rewarded_token).balanceOf(address(this)); RewardPool(reward_contract).getReward(); dr = IERC20(rewarded_token).balanceOf(address(this)).sub(dr); } uint amount = _claimable_last(addr, dr, reward_integral_[rewarded_token], reward_integral_for_[addr][rewarded_token]); if(amount > 0) rewards_for_[addr][rewarded_token] = rewards_for_[addr][rewarded_token].add(amount); if(dr > 0) reward_integral_[rewarded_token] = reward_integral_[rewarded_token].add(dr.mul(1 ether).div(totalSupply)); if(reward_integral_for_[addr][rewarded_token] != reward_integral_[rewarded_token]) reward_integral_for_[addr][rewarded_token] = reward_integral_[rewarded_token]; } function claimable_reward(address addr) virtual override public view returns (uint r) { uint delta = RewardPool(reward_contract).earned(address(this)); r = _claimable_last(addr, delta, reward_integral_[rewarded_token], reward_integral_for_[addr][rewarded_token]); r = r.add(rewards_for_[addr][rewarded_token].sub(claimed_rewards_for_[addr][rewarded_token])); } }

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{"success": true, "error": null, "results": {"detectors": [{"check": "unused-return", "impact": "Medium", "confidence": "Medium"}, {"check": "divide-before-multiply", "impact": "Medium", "confidence": "Medium"}, {"check": "incorrect-equality", "impact": "Medium", "confidence": "High"}, {"check": "reentrancy-no-eth", "impact": "Medium", "confidence": "Medium"}]}}

0x73b5E0D1841867ee9854988838ebc30aa5f67649

pragma solidity 0.5.15; contract CairoVerifierContract { function verifyProofExternal( uint256[] calldata proofParams, uint256[] calldata proof, uint256[] calldata publicInput) external; } contract CpuConstraintPoly { // The Memory map during the execution of this contract is as follows: // [0x0, 0x20) - periodic_column/pedersen/points/x. // [0x20, 0x40) - periodic_column/pedersen/points/y. // [0x40, 0x60) - periodic_column/ecdsa/generator_points/x. // [0x60, 0x80) - periodic_column/ecdsa/generator_points/y. // [0x80, 0xa0) - trace_length. // [0xa0, 0xc0) - offset_size. // [0xc0, 0xe0) - half_offset_size. // [0xe0, 0x100) - initial_ap. // [0x100, 0x120) - initial_pc. // [0x120, 0x140) - final_ap. // [0x140, 0x160) - final_pc. // [0x160, 0x180) - memory/multi_column_perm/perm/interaction_elm. // [0x180, 0x1a0) - memory/multi_column_perm/hash_interaction_elm0. // [0x1a0, 0x1c0) - memory/multi_column_perm/perm/public_memory_prod. // [0x1c0, 0x1e0) - rc16/perm/interaction_elm. // [0x1e0, 0x200) - rc16/perm/public_memory_prod. // [0x200, 0x220) - rc_min. // [0x220, 0x240) - rc_max. // [0x240, 0x260) - pedersen/shift_point.x. // [0x260, 0x280) - pedersen/shift_point.y. // [0x280, 0x2a0) - initial_pedersen_addr. // [0x2a0, 0x2c0) - initial_rc_addr. // [0x2c0, 0x2e0) - ecdsa/sig_config.alpha. // [0x2e0, 0x300) - ecdsa/sig_config.shift_point.x. // [0x300, 0x320) - ecdsa/sig_config.shift_point.y. // [0x320, 0x340) - ecdsa/sig_config.beta. // [0x340, 0x360) - initial_ecdsa_addr. // [0x360, 0x380) - initial_checkpoints_addr. // [0x380, 0x3a0) - final_checkpoints_addr. // [0x3a0, 0x3c0) - trace_generator. // [0x3c0, 0x3e0) - oods_point. // [0x3e0, 0x440) - interaction_elements. // [0x440, 0x2980) - coefficients. // [0x2980, 0x3f20) - oods_values. // ----------------------- end of input data - ------------------------- // [0x3f20, 0x3f40) - composition_degree_bound. // [0x3f40, 0x3f60) - intermediate_value/cpu/decode/opcode_rc/bit_0. // [0x3f60, 0x3f80) - intermediate_value/cpu/decode/opcode_rc/bit_1. // [0x3f80, 0x3fa0) - intermediate_value/cpu/decode/opcode_rc/bit_2. // [0x3fa0, 0x3fc0) - intermediate_value/cpu/decode/opcode_rc/bit_4. // [0x3fc0, 0x3fe0) - intermediate_value/cpu/decode/opcode_rc/bit_3. // [0x3fe0, 0x4000) - intermediate_value/cpu/decode/opcode_rc/bit_9. // [0x4000, 0x4020) - intermediate_value/cpu/decode/opcode_rc/bit_5. // [0x4020, 0x4040) - intermediate_value/cpu/decode/opcode_rc/bit_6. // [0x4040, 0x4060) - intermediate_value/cpu/decode/opcode_rc/bit_7. // [0x4060, 0x4080) - intermediate_value/cpu/decode/opcode_rc/bit_8. // [0x4080, 0x40a0) - intermediate_value/npc_reg_0. // [0x40a0, 0x40c0) - intermediate_value/cpu/decode/opcode_rc/bit_10. // [0x40c0, 0x40e0) - intermediate_value/cpu/decode/opcode_rc/bit_11. // [0x40e0, 0x4100) - intermediate_value/cpu/decode/opcode_rc/bit_12. // [0x4100, 0x4120) - intermediate_value/cpu/decode/opcode_rc/bit_13. // [0x4120, 0x4140) - intermediate_value/cpu/decode/opcode_rc/bit_14. // [0x4140, 0x4160) - intermediate_value/memory/address_diff_0. // [0x4160, 0x4180) - intermediate_value/rc16/diff_0. // [0x4180, 0x41a0) - intermediate_value/pedersen/hash0/ec_subset_sum/bit_0. // [0x41a0, 0x41c0) - intermediate_value/pedersen/hash0/ec_subset_sum/bit_neg_0. // [0x41c0, 0x41e0) - intermediate_value/pedersen/hash1/ec_subset_sum/bit_0. // [0x41e0, 0x4200) - intermediate_value/pedersen/hash1/ec_subset_sum/bit_neg_0. // [0x4200, 0x4220) - intermediate_value/pedersen/hash2/ec_subset_sum/bit_0. // [0x4220, 0x4240) - intermediate_value/pedersen/hash2/ec_subset_sum/bit_neg_0. // [0x4240, 0x4260) - intermediate_value/pedersen/hash3/ec_subset_sum/bit_0. // [0x4260, 0x4280) - intermediate_value/pedersen/hash3/ec_subset_sum/bit_neg_0. // [0x4280, 0x42a0) - intermediate_value/rc_builtin/value0_0. // [0x42a0, 0x42c0) - intermediate_value/rc_builtin/value1_0. // [0x42c0, 0x42e0) - intermediate_value/rc_builtin/value2_0. // [0x42e0, 0x4300) - intermediate_value/rc_builtin/value3_0. // [0x4300, 0x4320) - intermediate_value/rc_builtin/value4_0. // [0x4320, 0x4340) - intermediate_value/rc_builtin/value5_0. // [0x4340, 0x4360) - intermediate_value/rc_builtin/value6_0. // [0x4360, 0x4380) - intermediate_value/rc_builtin/value7_0. // [0x4380, 0x43a0) - intermediate_value/ecdsa/signature0/doubling_key/x_squared. // [0x43a0, 0x43c0) - intermediate_value/ecdsa/signature0/exponentiate_generator/bit_0. // [0x43c0, 0x43e0) - intermediate_value/ecdsa/signature0/exponentiate_generator/bit_neg_0. // [0x43e0, 0x4400) - intermediate_value/ecdsa/signature0/exponentiate_key/bit_0. // [0x4400, 0x4420) - intermediate_value/ecdsa/signature0/exponentiate_key/bit_neg_0. // [0x4420, 0x46e0) - expmods. // [0x46e0, 0x49c0) - denominator_invs. // [0x49c0, 0x4ca0) - denominators. // [0x4ca0, 0x4e00) - numerators. // [0x4e00, 0x50e0) - adjustments. // [0x50e0, 0x51a0) - expmod_context. function() external { uint256 res; assembly { let PRIME := 0x800000000000011000000000000000000000000000000000000000000000001 // Copy input from calldata to memory. calldatacopy(0x0, 0x0, /*Input data size*/ 0x3f20) let point := /*oods_point*/ mload(0x3c0) // Initialize composition_degree_bound to 2 * trace_length. mstore(0x3f20, mul(2, /*trace_length*/ mload(0x80))) function expmod(base, exponent, modulus) -> res { let p := /*expmod_context*/ 0x50e0 mstore(p, 0x20) // Length of Base. mstore(add(p, 0x20), 0x20) // Length of Exponent. mstore(add(p, 0x40), 0x20) // Length of Modulus. mstore(add(p, 0x60), base) // Base. mstore(add(p, 0x80), exponent) // Exponent. mstore(add(p, 0xa0), modulus) // Modulus. // Call modexp precompile. if iszero(staticcall(not(0), 0x05, p, 0xc0, p, 0x20)) { revert(0, 0) } res := mload(p) } function degreeAdjustment(compositionPolynomialDegreeBound, constraintDegree, numeratorDegree, denominatorDegree) -> res { res := sub(sub(compositionPolynomialDegreeBound, 1), sub(add(constraintDegree, numeratorDegree), denominatorDegree)) } { // Prepare expmods for denominators and numerators. // expmods[0] = point^trace_length. mstore(0x4420, expmod(point, /*trace_length*/ mload(0x80), PRIME)) // expmods[1] = point^(trace_length / 16). mstore(0x4440, expmod(point, div(/*trace_length*/ mload(0x80), 16), PRIME)) // expmods[2] = point^(trace_length / 2). mstore(0x4460, expmod(point, div(/*trace_length*/ mload(0x80), 2), PRIME)) // expmods[3] = point^(trace_length / 8). mstore(0x4480, expmod(point, div(/*trace_length*/ mload(0x80), 8), PRIME)) // expmods[4] = point^(trace_length / 4). mstore(0x44a0, expmod(point, div(/*trace_length*/ mload(0x80), 4), PRIME)) // expmods[5] = point^(trace_length / 256). mstore(0x44c0, expmod(point, div(/*trace_length*/ mload(0x80), 256), PRIME)) // expmods[6] = point^(trace_length / 512). mstore(0x44e0, expmod(point, div(/*trace_length*/ mload(0x80), 512), PRIME)) // expmods[7] = point^(trace_length / 128). mstore(0x4500, expmod(point, div(/*trace_length*/ mload(0x80), 128), PRIME)) // expmods[8] = point^(trace_length / 4096). mstore(0x4520, expmod(point, div(/*trace_length*/ mload(0x80), 4096), PRIME)) // expmods[9] = point^(trace_length / 32). mstore(0x4540, expmod(point, div(/*trace_length*/ mload(0x80), 32), PRIME)) // expmods[10] = point^(trace_length / 8192). mstore(0x4560, expmod(point, div(/*trace_length*/ mload(0x80), 8192), PRIME)) // expmods[11] = trace_generator^(15 * trace_length / 16). mstore(0x4580, expmod(/*trace_generator*/ mload(0x3a0), div(mul(15, /*trace_length*/ mload(0x80)), 16), PRIME)) // expmods[12] = trace_generator^(16 * (trace_length / 16 - 1)). mstore(0x45a0, expmod(/*trace_generator*/ mload(0x3a0), mul(16, sub(div(/*trace_length*/ mload(0x80), 16), 1)), PRIME)) // expmods[13] = trace_generator^(2 * (trace_length / 2 - 1)). mstore(0x45c0, expmod(/*trace_generator*/ mload(0x3a0), mul(2, sub(div(/*trace_length*/ mload(0x80), 2), 1)), PRIME)) // expmods[14] = trace_generator^(4 * (trace_length / 4 - 1)). mstore(0x45e0, expmod(/*trace_generator*/ mload(0x3a0), mul(4, sub(div(/*trace_length*/ mload(0x80), 4), 1)), PRIME)) // expmods[15] = trace_generator^(255 * trace_length / 256). mstore(0x4600, expmod(/*trace_generator*/ mload(0x3a0), div(mul(255, /*trace_length*/ mload(0x80)), 256), PRIME)) // expmods[16] = trace_generator^(63 * trace_length / 64). mstore(0x4620, expmod(/*trace_generator*/ mload(0x3a0), div(mul(63, /*trace_length*/ mload(0x80)), 64), PRIME)) // expmods[17] = trace_generator^(trace_length / 2). mstore(0x4640, expmod(/*trace_generator*/ mload(0x3a0), div(/*trace_length*/ mload(0x80), 2), PRIME)) // expmods[18] = trace_generator^(128 * (trace_length / 128 - 1)). mstore(0x4660, expmod(/*trace_generator*/ mload(0x3a0), mul(128, sub(div(/*trace_length*/ mload(0x80), 128), 1)), PRIME)) // expmods[19] = trace_generator^(251 * trace_length / 256). mstore(0x4680, expmod(/*trace_generator*/ mload(0x3a0), div(mul(251, /*trace_length*/ mload(0x80)), 256), PRIME)) // expmods[20] = trace_generator^(8192 * (trace_length / 8192 - 1)). mstore(0x46a0, expmod(/*trace_generator*/ mload(0x3a0), mul(8192, sub(div(/*trace_length*/ mload(0x80), 8192), 1)), PRIME)) // expmods[21] = trace_generator^(256 * (trace_length / 256 - 1)). mstore(0x46c0, expmod(/*trace_generator*/ mload(0x3a0), mul(256, sub(div(/*trace_length*/ mload(0x80), 256), 1)), PRIME)) } { // Prepare denominators for batch inverse. // Denominator for constraints: 'cpu/decode/opcode_rc/bit', 'pedersen/hash0/ec_subset_sum/booleanity_test', 'pedersen/hash0/ec_subset_sum/add_points/slope', 'pedersen/hash0/ec_subset_sum/add_points/x', 'pedersen/hash0/ec_subset_sum/add_points/y', 'pedersen/hash0/ec_subset_sum/copy_point/x', 'pedersen/hash0/ec_subset_sum/copy_point/y', 'pedersen/hash1/ec_subset_sum/booleanity_test', 'pedersen/hash1/ec_subset_sum/add_points/slope', 'pedersen/hash1/ec_subset_sum/add_points/x', 'pedersen/hash1/ec_subset_sum/add_points/y', 'pedersen/hash1/ec_subset_sum/copy_point/x', 'pedersen/hash1/ec_subset_sum/copy_point/y', 'pedersen/hash2/ec_subset_sum/booleanity_test', 'pedersen/hash2/ec_subset_sum/add_points/slope', 'pedersen/hash2/ec_subset_sum/add_points/x', 'pedersen/hash2/ec_subset_sum/add_points/y', 'pedersen/hash2/ec_subset_sum/copy_point/x', 'pedersen/hash2/ec_subset_sum/copy_point/y', 'pedersen/hash3/ec_subset_sum/booleanity_test', 'pedersen/hash3/ec_subset_sum/add_points/slope', 'pedersen/hash3/ec_subset_sum/add_points/x', 'pedersen/hash3/ec_subset_sum/add_points/y', 'pedersen/hash3/ec_subset_sum/copy_point/x', 'pedersen/hash3/ec_subset_sum/copy_point/y'. // denominators[0] = point^trace_length - 1. mstore(0x49c0, addmod(/*point^trace_length*/ mload(0x4420), sub(PRIME, 1), PRIME)) // Denominator for constraints: 'cpu/decode/opcode_rc/last_bit'. // denominators[1] = point^(trace_length / 16) - trace_generator^(15 * trace_length / 16). mstore(0x49e0, addmod( /*point^(trace_length / 16)*/ mload(0x4440), sub(PRIME, /*trace_generator^(15 * trace_length / 16)*/ mload(0x4580)), PRIME)) // Denominator for constraints: 'cpu/decode/opcode_rc_input', 'cpu/operands/mem_dst_addr', 'cpu/operands/mem0_addr', 'cpu/operands/mem1_addr', 'cpu/operands/ops_mul', 'cpu/operands/res', 'cpu/update_registers/update_pc/tmp0', 'cpu/update_registers/update_pc/tmp1', 'cpu/update_registers/update_pc/pc_cond_negative', 'cpu/update_registers/update_pc/pc_cond_positive', 'cpu/update_registers/update_ap/ap_update', 'cpu/update_registers/update_fp/fp_update', 'cpu/opcodes/call/push_fp', 'cpu/opcodes/call/push_pc', 'cpu/opcodes/assert_eq/assert_eq', 'ecdsa/signature0/doubling_key/slope', 'ecdsa/signature0/doubling_key/x', 'ecdsa/signature0/doubling_key/y', 'ecdsa/signature0/exponentiate_key/booleanity_test', 'ecdsa/signature0/exponentiate_key/add_points/slope', 'ecdsa/signature0/exponentiate_key/add_points/x', 'ecdsa/signature0/exponentiate_key/add_points/y', 'ecdsa/signature0/exponentiate_key/add_points/x_diff_inv', 'ecdsa/signature0/exponentiate_key/copy_point/x', 'ecdsa/signature0/exponentiate_key/copy_point/y'. // denominators[2] = point^(trace_length / 16) - 1. mstore(0x4a00, addmod(/*point^(trace_length / 16)*/ mload(0x4440), sub(PRIME, 1), PRIME)) // Denominator for constraints: 'initial_ap', 'initial_fp', 'initial_pc', 'memory/multi_column_perm/perm/init0', 'rc16/perm/init0', 'rc16/minimum', 'pedersen/init_addr', 'rc_builtin/init_addr', 'ecdsa/init_addr', 'checkpoints/req_pc_init_addr'. // denominators[3] = point - 1. mstore(0x4a20, addmod(point, sub(PRIME, 1), PRIME)) // Denominator for constraints: 'final_ap', 'final_pc'. // denominators[4] = point - trace_generator^(16 * (trace_length / 16 - 1)). mstore(0x4a40, addmod( point, sub(PRIME, /*trace_generator^(16 * (trace_length / 16 - 1))*/ mload(0x45a0)), PRIME)) // Denominator for constraints: 'memory/multi_column_perm/perm/step0', 'memory/diff_is_bit', 'memory/is_func'. // denominators[5] = point^(trace_length / 2) - 1. mstore(0x4a60, addmod(/*point^(trace_length / 2)*/ mload(0x4460), sub(PRIME, 1), PRIME)) // Denominator for constraints: 'memory/multi_column_perm/perm/last'. // denominators[6] = point - trace_generator^(2 * (trace_length / 2 - 1)). mstore(0x4a80, addmod( point, sub(PRIME, /*trace_generator^(2 * (trace_length / 2 - 1))*/ mload(0x45c0)), PRIME)) // Denominator for constraints: 'public_memory_addr_zero', 'public_memory_value_zero'. // denominators[7] = point^(trace_length / 8) - 1. mstore(0x4aa0, addmod(/*point^(trace_length / 8)*/ mload(0x4480), sub(PRIME, 1), PRIME)) // Denominator for constraints: 'rc16/perm/step0', 'rc16/diff_is_bit'. // denominators[8] = point^(trace_length / 4) - 1. mstore(0x4ac0, addmod(/*point^(trace_length / 4)*/ mload(0x44a0), sub(PRIME, 1), PRIME)) // Denominator for constraints: 'rc16/perm/last', 'rc16/maximum'. // denominators[9] = point - trace_generator^(4 * (trace_length / 4 - 1)). mstore(0x4ae0, addmod( point, sub(PRIME, /*trace_generator^(4 * (trace_length / 4 - 1))*/ mload(0x45e0)), PRIME)) // Denominator for constraints: 'pedersen/hash0/ec_subset_sum/bit_extraction_end', 'pedersen/hash1/ec_subset_sum/bit_extraction_end', 'pedersen/hash2/ec_subset_sum/bit_extraction_end', 'pedersen/hash3/ec_subset_sum/bit_extraction_end'. // denominators[10] = point^(trace_length / 256) - trace_generator^(63 * trace_length / 64). mstore(0x4b00, addmod( /*point^(trace_length / 256)*/ mload(0x44c0), sub(PRIME, /*trace_generator^(63 * trace_length / 64)*/ mload(0x4620)), PRIME)) // Denominator for constraints: 'pedersen/hash0/ec_subset_sum/zeros_tail', 'pedersen/hash1/ec_subset_sum/zeros_tail', 'pedersen/hash2/ec_subset_sum/zeros_tail', 'pedersen/hash3/ec_subset_sum/zeros_tail'. // denominators[11] = point^(trace_length / 256) - trace_generator^(255 * trace_length / 256). mstore(0x4b20, addmod( /*point^(trace_length / 256)*/ mload(0x44c0), sub(PRIME, /*trace_generator^(255 * trace_length / 256)*/ mload(0x4600)), PRIME)) // Denominator for constraints: 'pedersen/hash0/copy_point/x', 'pedersen/hash0/copy_point/y', 'pedersen/hash1/copy_point/x', 'pedersen/hash1/copy_point/y', 'pedersen/hash2/copy_point/x', 'pedersen/hash2/copy_point/y', 'pedersen/hash3/copy_point/x', 'pedersen/hash3/copy_point/y', 'checkpoints/required_fp_addr', 'checkpoints/required_pc_next_addr', 'checkpoints/req_pc', 'checkpoints/req_fp'. // denominators[12] = point^(trace_length / 256) - 1. mstore(0x4b40, addmod(/*point^(trace_length / 256)*/ mload(0x44c0), sub(PRIME, 1), PRIME)) // Denominator for constraints: 'pedersen/hash0/init/x', 'pedersen/hash0/init/y', 'pedersen/hash1/init/x', 'pedersen/hash1/init/y', 'pedersen/hash2/init/x', 'pedersen/hash2/init/y', 'pedersen/hash3/init/x', 'pedersen/hash3/init/y', 'pedersen/input0_value0', 'pedersen/input0_value1', 'pedersen/input0_value2', 'pedersen/input0_value3', 'pedersen/input1_value0', 'pedersen/input1_value1', 'pedersen/input1_value2', 'pedersen/input1_value3', 'pedersen/output_value0', 'pedersen/output_value1', 'pedersen/output_value2', 'pedersen/output_value3'. // denominators[13] = point^(trace_length / 512) - 1. mstore(0x4b60, addmod(/*point^(trace_length / 512)*/ mload(0x44e0), sub(PRIME, 1), PRIME)) // Denominator for constraints: 'pedersen/input0_addr', 'pedersen/input1_addr', 'pedersen/output_addr', 'rc_builtin/value', 'rc_builtin/addr_step'. // denominators[14] = point^(trace_length / 128) - 1. mstore(0x4b80, addmod(/*point^(trace_length / 128)*/ mload(0x4500), sub(PRIME, 1), PRIME)) // Denominator for constraints: 'ecdsa/signature0/exponentiate_generator/booleanity_test', 'ecdsa/signature0/exponentiate_generator/add_points/slope', 'ecdsa/signature0/exponentiate_generator/add_points/x', 'ecdsa/signature0/exponentiate_generator/add_points/y', 'ecdsa/signature0/exponentiate_generator/add_points/x_diff_inv', 'ecdsa/signature0/exponentiate_generator/copy_point/x', 'ecdsa/signature0/exponentiate_generator/copy_point/y'. // denominators[15] = point^(trace_length / 32) - 1. mstore(0x4ba0, addmod(/*point^(trace_length / 32)*/ mload(0x4540), sub(PRIME, 1), PRIME)) // Denominator for constraints: 'ecdsa/signature0/exponentiate_generator/bit_extraction_end'. // denominators[16] = point^(trace_length / 8192) - trace_generator^(251 * trace_length / 256). mstore(0x4bc0, addmod( /*point^(trace_length / 8192)*/ mload(0x4560), sub(PRIME, /*trace_generator^(251 * trace_length / 256)*/ mload(0x4680)), PRIME)) // Denominator for constraints: 'ecdsa/signature0/exponentiate_generator/zeros_tail'. // denominators[17] = point^(trace_length / 8192) - trace_generator^(255 * trace_length / 256). mstore(0x4be0, addmod( /*point^(trace_length / 8192)*/ mload(0x4560), sub(PRIME, /*trace_generator^(255 * trace_length / 256)*/ mload(0x4600)), PRIME)) // Denominator for constraints: 'ecdsa/signature0/exponentiate_key/bit_extraction_end'. // denominators[18] = point^(trace_length / 4096) - trace_generator^(251 * trace_length / 256). mstore(0x4c00, addmod( /*point^(trace_length / 4096)*/ mload(0x4520), sub(PRIME, /*trace_generator^(251 * trace_length / 256)*/ mload(0x4680)), PRIME)) // Denominator for constraints: 'ecdsa/signature0/exponentiate_key/zeros_tail'. // denominators[19] = point^(trace_length / 4096) - trace_generator^(255 * trace_length / 256). mstore(0x4c20, addmod( /*point^(trace_length / 4096)*/ mload(0x4520), sub(PRIME, /*trace_generator^(255 * trace_length / 256)*/ mload(0x4600)), PRIME)) // Denominator for constraints: 'ecdsa/signature0/init_gen/x', 'ecdsa/signature0/init_gen/y', 'ecdsa/signature0/add_results/slope', 'ecdsa/signature0/add_results/x', 'ecdsa/signature0/add_results/y', 'ecdsa/signature0/add_results/x_diff_inv', 'ecdsa/signature0/extract_r/slope', 'ecdsa/signature0/extract_r/x', 'ecdsa/signature0/extract_r/x_diff_inv', 'ecdsa/signature0/z_nonzero', 'ecdsa/signature0/q_on_curve/x_squared', 'ecdsa/signature0/q_on_curve/on_curve', 'ecdsa/message_addr', 'ecdsa/pubkey_addr', 'ecdsa/message_value0', 'ecdsa/pubkey_value0'. // denominators[20] = point^(trace_length / 8192) - 1. mstore(0x4c40, addmod(/*point^(trace_length / 8192)*/ mload(0x4560), sub(PRIME, 1), PRIME)) // Denominator for constraints: 'ecdsa/signature0/init_key/x', 'ecdsa/signature0/init_key/y', 'ecdsa/signature0/r_and_w_nonzero'. // denominators[21] = point^(trace_length / 4096) - 1. mstore(0x4c60, addmod(/*point^(trace_length / 4096)*/ mload(0x4520), sub(PRIME, 1), PRIME)) // Denominator for constraints: 'checkpoints/req_pc_final_addr'. // denominators[22] = point - trace_generator^(256 * (trace_length / 256 - 1)). mstore(0x4c80, addmod( point, sub(PRIME, /*trace_generator^(256 * (trace_length / 256 - 1))*/ mload(0x46c0)), PRIME)) } { // Compute the inverses of the denominators into denominatorInvs using batch inverse. // Start by computing the cumulative product. // Let (d_0, d_1, d_2, ..., d_{n-1}) be the values in denominators. After this loop // denominatorInvs will be (1, d_0, d_0 * d_1, ...) and prod will contain the value of // d_0 * ... * d_{n-1}. // Compute the offset between the partialProducts array and the input values array. let productsToValuesOffset := 0x2e0 let prod := 1 let partialProductEndPtr := 0x49c0 for { let partialProductPtr := 0x46e0 } lt(partialProductPtr, partialProductEndPtr) { partialProductPtr := add(partialProductPtr, 0x20) } { mstore(partialProductPtr, prod) // prod *= d_{i}. prod := mulmod(prod, mload(add(partialProductPtr, productsToValuesOffset)), PRIME) } let firstPartialProductPtr := 0x46e0 // Compute the inverse of the product. let prodInv := expmod(prod, sub(PRIME, 2), PRIME) if eq(prodInv, 0) { // Solidity generates reverts with reason that look as follows: // 1. 4 bytes with the constant 0x08c379a0 (== Keccak256(b'Error(string)')[:4]). // 2. 32 bytes offset bytes (always 0x20 as far as i can tell). // 3. 32 bytes with the length of the revert reason. // 4. Revert reason string. mstore(0, 0x08c379a000000000000000000000000000000000000000000000000000000000) mstore(0x4, 0x20) mstore(0x24, 0x1e) mstore(0x44, "Batch inverse product is zero.") revert(0, 0x62) } // Compute the inverses. // Loop over denominator_invs in reverse order. // currentPartialProductPtr is initialized to one past the end. let currentPartialProductPtr := 0x49c0 for { } gt(currentPartialProductPtr, firstPartialProductPtr) { } { currentPartialProductPtr := sub(currentPartialProductPtr, 0x20) // Store 1/d_{i} = (d_0 * ... * d_{i-1}) * 1/(d_0 * ... * d_{i}). mstore(currentPartialProductPtr, mulmod(mload(currentPartialProductPtr), prodInv, PRIME)) // Update prodInv to be 1/(d_0 * ... * d_{i-1}) by multiplying by d_i. prodInv := mulmod(prodInv, mload(add(currentPartialProductPtr, productsToValuesOffset)), PRIME) } } { // Compute numerators and adjustment polynomials. // Numerator for constraints 'cpu/decode/opcode_rc/bit'. // numerators[0] = point^(trace_length / 16) - trace_generator^(15 * trace_length / 16). mstore(0x4ca0, addmod( /*point^(trace_length / 16)*/ mload(0x4440), sub(PRIME, /*trace_generator^(15 * trace_length / 16)*/ mload(0x4580)), PRIME)) // Numerator for constraints 'cpu/update_registers/update_pc/tmp0', 'cpu/update_registers/update_pc/tmp1', 'cpu/update_registers/update_pc/pc_cond_negative', 'cpu/update_registers/update_pc/pc_cond_positive', 'cpu/update_registers/update_ap/ap_update', 'cpu/update_registers/update_fp/fp_update'. // numerators[1] = point - trace_generator^(16 * (trace_length / 16 - 1)). mstore(0x4cc0, addmod( point, sub(PRIME, /*trace_generator^(16 * (trace_length / 16 - 1))*/ mload(0x45a0)), PRIME)) // Numerator for constraints 'memory/multi_column_perm/perm/step0', 'memory/diff_is_bit', 'memory/is_func'. // numerators[2] = point - trace_generator^(2 * (trace_length / 2 - 1)). mstore(0x4ce0, addmod( point, sub(PRIME, /*trace_generator^(2 * (trace_length / 2 - 1))*/ mload(0x45c0)), PRIME)) // Numerator for constraints 'rc16/perm/step0', 'rc16/diff_is_bit'. // numerators[3] = point - trace_generator^(4 * (trace_length / 4 - 1)). mstore(0x4d00, addmod( point, sub(PRIME, /*trace_generator^(4 * (trace_length / 4 - 1))*/ mload(0x45e0)), PRIME)) // Numerator for constraints 'pedersen/hash0/ec_subset_sum/booleanity_test', 'pedersen/hash0/ec_subset_sum/add_points/slope', 'pedersen/hash0/ec_subset_sum/add_points/x', 'pedersen/hash0/ec_subset_sum/add_points/y', 'pedersen/hash0/ec_subset_sum/copy_point/x', 'pedersen/hash0/ec_subset_sum/copy_point/y', 'pedersen/hash1/ec_subset_sum/booleanity_test', 'pedersen/hash1/ec_subset_sum/add_points/slope', 'pedersen/hash1/ec_subset_sum/add_points/x', 'pedersen/hash1/ec_subset_sum/add_points/y', 'pedersen/hash1/ec_subset_sum/copy_point/x', 'pedersen/hash1/ec_subset_sum/copy_point/y', 'pedersen/hash2/ec_subset_sum/booleanity_test', 'pedersen/hash2/ec_subset_sum/add_points/slope', 'pedersen/hash2/ec_subset_sum/add_points/x', 'pedersen/hash2/ec_subset_sum/add_points/y', 'pedersen/hash2/ec_subset_sum/copy_point/x', 'pedersen/hash2/ec_subset_sum/copy_point/y', 'pedersen/hash3/ec_subset_sum/booleanity_test', 'pedersen/hash3/ec_subset_sum/add_points/slope', 'pedersen/hash3/ec_subset_sum/add_points/x', 'pedersen/hash3/ec_subset_sum/add_points/y', 'pedersen/hash3/ec_subset_sum/copy_point/x', 'pedersen/hash3/ec_subset_sum/copy_point/y'. // numerators[4] = point^(trace_length / 256) - trace_generator^(255 * trace_length / 256). mstore(0x4d20, addmod( /*point^(trace_length / 256)*/ mload(0x44c0), sub(PRIME, /*trace_generator^(255 * trace_length / 256)*/ mload(0x4600)), PRIME)) // Numerator for constraints 'pedersen/hash0/copy_point/x', 'pedersen/hash0/copy_point/y', 'pedersen/hash1/copy_point/x', 'pedersen/hash1/copy_point/y', 'pedersen/hash2/copy_point/x', 'pedersen/hash2/copy_point/y', 'pedersen/hash3/copy_point/x', 'pedersen/hash3/copy_point/y'. // numerators[5] = point^(trace_length / 512) - trace_generator^(trace_length / 2). mstore(0x4d40, addmod( /*point^(trace_length / 512)*/ mload(0x44e0), sub(PRIME, /*trace_generator^(trace_length / 2)*/ mload(0x4640)), PRIME)) // Numerator for constraints 'pedersen/input0_addr', 'rc_builtin/addr_step'. // numerators[6] = point - trace_generator^(128 * (trace_length / 128 - 1)). mstore(0x4d60, addmod( point, sub(PRIME, /*trace_generator^(128 * (trace_length / 128 - 1))*/ mload(0x4660)), PRIME)) // Numerator for constraints 'ecdsa/signature0/doubling_key/slope', 'ecdsa/signature0/doubling_key/x', 'ecdsa/signature0/doubling_key/y', 'ecdsa/signature0/exponentiate_key/booleanity_test', 'ecdsa/signature0/exponentiate_key/add_points/slope', 'ecdsa/signature0/exponentiate_key/add_points/x', 'ecdsa/signature0/exponentiate_key/add_points/y', 'ecdsa/signature0/exponentiate_key/add_points/x_diff_inv', 'ecdsa/signature0/exponentiate_key/copy_point/x', 'ecdsa/signature0/exponentiate_key/copy_point/y'. // numerators[7] = point^(trace_length / 4096) - trace_generator^(255 * trace_length / 256). mstore(0x4d80, addmod( /*point^(trace_length / 4096)*/ mload(0x4520), sub(PRIME, /*trace_generator^(255 * trace_length / 256)*/ mload(0x4600)), PRIME)) // Numerator for constraints 'ecdsa/signature0/exponentiate_generator/booleanity_test', 'ecdsa/signature0/exponentiate_generator/add_points/slope', 'ecdsa/signature0/exponentiate_generator/add_points/x', 'ecdsa/signature0/exponentiate_generator/add_points/y', 'ecdsa/signature0/exponentiate_generator/add_points/x_diff_inv', 'ecdsa/signature0/exponentiate_generator/copy_point/x', 'ecdsa/signature0/exponentiate_generator/copy_point/y'. // numerators[8] = point^(trace_length / 8192) - trace_generator^(255 * trace_length / 256). mstore(0x4da0, addmod( /*point^(trace_length / 8192)*/ mload(0x4560), sub(PRIME, /*trace_generator^(255 * trace_length / 256)*/ mload(0x4600)), PRIME)) // Numerator for constraints 'ecdsa/pubkey_addr'. // numerators[9] = point - trace_generator^(8192 * (trace_length / 8192 - 1)). mstore(0x4dc0, addmod( point, sub(PRIME, /*trace_generator^(8192 * (trace_length / 8192 - 1))*/ mload(0x46a0)), PRIME)) // Numerator for constraints 'checkpoints/required_pc_next_addr', 'checkpoints/req_pc', 'checkpoints/req_fp'. // numerators[10] = point - trace_generator^(256 * (trace_length / 256 - 1)). mstore(0x4de0, addmod( point, sub(PRIME, /*trace_generator^(256 * (trace_length / 256 - 1))*/ mload(0x46c0)), PRIME)) // Adjustment polynomial for constraints 'cpu/decode/opcode_rc/bit'. // adjustments[0] = point^degreeAdjustment(composition_degree_bound, 2 * (trace_length - 1), trace_length / 16, trace_length). mstore(0x4e00, expmod(point, degreeAdjustment(/*composition_degree_bound*/ mload(0x3f20), mul(2, sub(/*trace_length*/ mload(0x80), 1)), div(/*trace_length*/ mload(0x80), 16), /*trace_length*/ mload(0x80)), PRIME)) // Adjustment polynomial for constraints 'cpu/decode/opcode_rc/last_bit', 'cpu/operands/mem_dst_addr', 'cpu/operands/mem0_addr', 'cpu/operands/mem1_addr', 'cpu/operands/ops_mul', 'cpu/operands/res', 'cpu/opcodes/call/push_fp', 'cpu/opcodes/call/push_pc', 'cpu/opcodes/assert_eq/assert_eq'. // adjustments[1] = point^degreeAdjustment(composition_degree_bound, 2 * (trace_length - 1), 0, trace_length / 16). mstore(0x4e20, expmod(point, degreeAdjustment(/*composition_degree_bound*/ mload(0x3f20), mul(2, sub(/*trace_length*/ mload(0x80), 1)), 0, div(/*trace_length*/ mload(0x80), 16)), PRIME)) // Adjustment polynomial for constraints 'cpu/decode/opcode_rc_input'. // adjustments[2] = point^degreeAdjustment(composition_degree_bound, trace_length - 1, 0, trace_length / 16). mstore(0x4e40, expmod(point, degreeAdjustment(/*composition_degree_bound*/ mload(0x3f20), sub(/*trace_length*/ mload(0x80), 1), 0, div(/*trace_length*/ mload(0x80), 16)), PRIME)) // Adjustment polynomial for constraints 'cpu/update_registers/update_pc/tmp0', 'cpu/update_registers/update_pc/tmp1', 'cpu/update_registers/update_pc/pc_cond_negative', 'cpu/update_registers/update_pc/pc_cond_positive', 'cpu/update_registers/update_ap/ap_update', 'cpu/update_registers/update_fp/fp_update'. // adjustments[3] = point^degreeAdjustment(composition_degree_bound, 2 * (trace_length - 1), 1, trace_length / 16). mstore(0x4e60, expmod(point, degreeAdjustment(/*composition_degree_bound*/ mload(0x3f20), mul(2, sub(/*trace_length*/ mload(0x80), 1)), 1, div(/*trace_length*/ mload(0x80), 16)), PRIME)) // Adjustment polynomial for constraints 'initial_ap', 'initial_fp', 'initial_pc', 'final_ap', 'final_pc', 'memory/multi_column_perm/perm/last', 'rc16/perm/last', 'rc16/minimum', 'rc16/maximum', 'pedersen/init_addr', 'rc_builtin/init_addr', 'ecdsa/init_addr', 'checkpoints/req_pc_init_addr', 'checkpoints/req_pc_final_addr'. // adjustments[4] = point^degreeAdjustment(composition_degree_bound, trace_length - 1, 0, 1). mstore(0x4e80, expmod(point, degreeAdjustment(/*composition_degree_bound*/ mload(0x3f20), sub(/*trace_length*/ mload(0x80), 1), 0, 1), PRIME)) // Adjustment polynomial for constraints 'memory/multi_column_perm/perm/init0', 'rc16/perm/init0'. // adjustments[5] = point^degreeAdjustment(composition_degree_bound, 2 * (trace_length - 1), 0, 1). mstore(0x4ea0, expmod(point, degreeAdjustment(/*composition_degree_bound*/ mload(0x3f20), mul(2, sub(/*trace_length*/ mload(0x80), 1)), 0, 1), PRIME)) // Adjustment polynomial for constraints 'memory/multi_column_perm/perm/step0', 'memory/diff_is_bit', 'memory/is_func'. // adjustments[6] = point^degreeAdjustment(composition_degree_bound, 2 * (trace_length - 1), 1, trace_length / 2). mstore(0x4ec0, expmod(point, degreeAdjustment(/*composition_degree_bound*/ mload(0x3f20), mul(2, sub(/*trace_length*/ mload(0x80), 1)), 1, div(/*trace_length*/ mload(0x80), 2)), PRIME)) // Adjustment polynomial for constraints 'public_memory_addr_zero', 'public_memory_value_zero'. // adjustments[7] = point^degreeAdjustment(composition_degree_bound, trace_length - 1, 0, trace_length / 8). mstore(0x4ee0, expmod(point, degreeAdjustment(/*composition_degree_bound*/ mload(0x3f20), sub(/*trace_length*/ mload(0x80), 1), 0, div(/*trace_length*/ mload(0x80), 8)), PRIME)) // Adjustment polynomial for constraints 'rc16/perm/step0', 'rc16/diff_is_bit'. // adjustments[8] = point^degreeAdjustment(composition_degree_bound, 2 * (trace_length - 1), 1, trace_length / 4). mstore(0x4f00, expmod(point, degreeAdjustment(/*composition_degree_bound*/ mload(0x3f20), mul(2, sub(/*trace_length*/ mload(0x80), 1)), 1, div(/*trace_length*/ mload(0x80), 4)), PRIME)) // Adjustment polynomial for constraints 'pedersen/hash0/ec_subset_sum/booleanity_test', 'pedersen/hash0/ec_subset_sum/add_points/slope', 'pedersen/hash0/ec_subset_sum/add_points/x', 'pedersen/hash0/ec_subset_sum/add_points/y', 'pedersen/hash0/ec_subset_sum/copy_point/x', 'pedersen/hash0/ec_subset_sum/copy_point/y', 'pedersen/hash1/ec_subset_sum/booleanity_test', 'pedersen/hash1/ec_subset_sum/add_points/slope', 'pedersen/hash1/ec_subset_sum/add_points/x', 'pedersen/hash1/ec_subset_sum/add_points/y', 'pedersen/hash1/ec_subset_sum/copy_point/x', 'pedersen/hash1/ec_subset_sum/copy_point/y', 'pedersen/hash2/ec_subset_sum/booleanity_test', 'pedersen/hash2/ec_subset_sum/add_points/slope', 'pedersen/hash2/ec_subset_sum/add_points/x', 'pedersen/hash2/ec_subset_sum/add_points/y', 'pedersen/hash2/ec_subset_sum/copy_point/x', 'pedersen/hash2/ec_subset_sum/copy_point/y', 'pedersen/hash3/ec_subset_sum/booleanity_test', 'pedersen/hash3/ec_subset_sum/add_points/slope', 'pedersen/hash3/ec_subset_sum/add_points/x', 'pedersen/hash3/ec_subset_sum/add_points/y', 'pedersen/hash3/ec_subset_sum/copy_point/x', 'pedersen/hash3/ec_subset_sum/copy_point/y'. // adjustments[9] = point^degreeAdjustment(composition_degree_bound, 2 * (trace_length - 1), trace_length / 256, trace_length). mstore(0x4f20, expmod(point, degreeAdjustment(/*composition_degree_bound*/ mload(0x3f20), mul(2, sub(/*trace_length*/ mload(0x80), 1)), div(/*trace_length*/ mload(0x80), 256), /*trace_length*/ mload(0x80)), PRIME)) // Adjustment polynomial for constraints 'pedersen/hash0/ec_subset_sum/bit_extraction_end', 'pedersen/hash0/ec_subset_sum/zeros_tail', 'pedersen/hash1/ec_subset_sum/bit_extraction_end', 'pedersen/hash1/ec_subset_sum/zeros_tail', 'pedersen/hash2/ec_subset_sum/bit_extraction_end', 'pedersen/hash2/ec_subset_sum/zeros_tail', 'pedersen/hash3/ec_subset_sum/bit_extraction_end', 'pedersen/hash3/ec_subset_sum/zeros_tail', 'checkpoints/required_fp_addr'. // adjustments[10] = point^degreeAdjustment(composition_degree_bound, trace_length - 1, 0, trace_length / 256). mstore(0x4f40, expmod(point, degreeAdjustment(/*composition_degree_bound*/ mload(0x3f20), sub(/*trace_length*/ mload(0x80), 1), 0, div(/*trace_length*/ mload(0x80), 256)), PRIME)) // Adjustment polynomial for constraints 'pedersen/hash0/copy_point/x', 'pedersen/hash0/copy_point/y', 'pedersen/hash1/copy_point/x', 'pedersen/hash1/copy_point/y', 'pedersen/hash2/copy_point/x', 'pedersen/hash2/copy_point/y', 'pedersen/hash3/copy_point/x', 'pedersen/hash3/copy_point/y'. // adjustments[11] = point^degreeAdjustment(composition_degree_bound, trace_length - 1, trace_length / 512, trace_length / 256). mstore(0x4f60, expmod(point, degreeAdjustment(/*composition_degree_bound*/ mload(0x3f20), sub(/*trace_length*/ mload(0x80), 1), div(/*trace_length*/ mload(0x80), 512), div(/*trace_length*/ mload(0x80), 256)), PRIME)) // Adjustment polynomial for constraints 'pedersen/hash0/init/x', 'pedersen/hash0/init/y', 'pedersen/hash1/init/x', 'pedersen/hash1/init/y', 'pedersen/hash2/init/x', 'pedersen/hash2/init/y', 'pedersen/hash3/init/x', 'pedersen/hash3/init/y', 'pedersen/input0_value0', 'pedersen/input0_value1', 'pedersen/input0_value2', 'pedersen/input0_value3', 'pedersen/input1_value0', 'pedersen/input1_value1', 'pedersen/input1_value2', 'pedersen/input1_value3', 'pedersen/output_value0', 'pedersen/output_value1', 'pedersen/output_value2', 'pedersen/output_value3'. // adjustments[12] = point^degreeAdjustment(composition_degree_bound, trace_length - 1, 0, trace_length / 512). mstore(0x4f80, expmod(point, degreeAdjustment(/*composition_degree_bound*/ mload(0x3f20), sub(/*trace_length*/ mload(0x80), 1), 0, div(/*trace_length*/ mload(0x80), 512)), PRIME)) // Adjustment polynomial for constraints 'pedersen/input0_addr', 'rc_builtin/addr_step'. // adjustments[13] = point^degreeAdjustment(composition_degree_bound, trace_length - 1, 1, trace_length / 128). mstore(0x4fa0, expmod(point, degreeAdjustment(/*composition_degree_bound*/ mload(0x3f20), sub(/*trace_length*/ mload(0x80), 1), 1, div(/*trace_length*/ mload(0x80), 128)), PRIME)) // Adjustment polynomial for constraints 'pedersen/input1_addr', 'pedersen/output_addr', 'rc_builtin/value'. // adjustments[14] = point^degreeAdjustment(composition_degree_bound, trace_length - 1, 0, trace_length / 128). mstore(0x4fc0, expmod(point, degreeAdjustment(/*composition_degree_bound*/ mload(0x3f20), sub(/*trace_length*/ mload(0x80), 1), 0, div(/*trace_length*/ mload(0x80), 128)), PRIME)) // Adjustment polynomial for constraints 'ecdsa/signature0/doubling_key/slope', 'ecdsa/signature0/doubling_key/x', 'ecdsa/signature0/doubling_key/y', 'ecdsa/signature0/exponentiate_key/booleanity_test', 'ecdsa/signature0/exponentiate_key/add_points/slope', 'ecdsa/signature0/exponentiate_key/add_points/x', 'ecdsa/signature0/exponentiate_key/add_points/y', 'ecdsa/signature0/exponentiate_key/add_points/x_diff_inv', 'ecdsa/signature0/exponentiate_key/copy_point/x', 'ecdsa/signature0/exponentiate_key/copy_point/y'. // adjustments[15] = point^degreeAdjustment(composition_degree_bound, 2 * (trace_length - 1), trace_length / 4096, trace_length / 16). mstore(0x4fe0, expmod(point, degreeAdjustment(/*composition_degree_bound*/ mload(0x3f20), mul(2, sub(/*trace_length*/ mload(0x80), 1)), div(/*trace_length*/ mload(0x80), 4096), div(/*trace_length*/ mload(0x80), 16)), PRIME)) // Adjustment polynomial for constraints 'ecdsa/signature0/exponentiate_generator/booleanity_test', 'ecdsa/signature0/exponentiate_generator/add_points/slope', 'ecdsa/signature0/exponentiate_generator/add_points/x', 'ecdsa/signature0/exponentiate_generator/add_points/y', 'ecdsa/signature0/exponentiate_generator/add_points/x_diff_inv', 'ecdsa/signature0/exponentiate_generator/copy_point/x', 'ecdsa/signature0/exponentiate_generator/copy_point/y'. // adjustments[16] = point^degreeAdjustment(composition_degree_bound, 2 * (trace_length - 1), trace_length / 8192, trace_length / 32). mstore(0x5000, expmod(point, degreeAdjustment(/*composition_degree_bound*/ mload(0x3f20), mul(2, sub(/*trace_length*/ mload(0x80), 1)), div(/*trace_length*/ mload(0x80), 8192), div(/*trace_length*/ mload(0x80), 32)), PRIME)) // Adjustment polynomial for constraints 'ecdsa/signature0/exponentiate_generator/bit_extraction_end', 'ecdsa/signature0/exponentiate_generator/zeros_tail', 'ecdsa/signature0/init_gen/x', 'ecdsa/signature0/init_gen/y', 'ecdsa/message_addr', 'ecdsa/message_value0', 'ecdsa/pubkey_value0'. // adjustments[17] = point^degreeAdjustment(composition_degree_bound, trace_length - 1, 0, trace_length / 8192). mstore(0x5020, expmod(point, degreeAdjustment(/*composition_degree_bound*/ mload(0x3f20), sub(/*trace_length*/ mload(0x80), 1), 0, div(/*trace_length*/ mload(0x80), 8192)), PRIME)) // Adjustment polynomial for constraints 'ecdsa/signature0/exponentiate_key/bit_extraction_end', 'ecdsa/signature0/exponentiate_key/zeros_tail', 'ecdsa/signature0/init_key/x', 'ecdsa/signature0/init_key/y'. // adjustments[18] = point^degreeAdjustment(composition_degree_bound, trace_length - 1, 0, trace_length / 4096). mstore(0x5040, expmod(point, degreeAdjustment(/*composition_degree_bound*/ mload(0x3f20), sub(/*trace_length*/ mload(0x80), 1), 0, div(/*trace_length*/ mload(0x80), 4096)), PRIME)) // Adjustment polynomial for constraints 'ecdsa/signature0/add_results/slope', 'ecdsa/signature0/add_results/x', 'ecdsa/signature0/add_results/y', 'ecdsa/signature0/add_results/x_diff_inv', 'ecdsa/signature0/extract_r/slope', 'ecdsa/signature0/extract_r/x', 'ecdsa/signature0/extract_r/x_diff_inv', 'ecdsa/signature0/z_nonzero', 'ecdsa/signature0/q_on_curve/x_squared', 'ecdsa/signature0/q_on_curve/on_curve'. // adjustments[19] = point^degreeAdjustment(composition_degree_bound, 2 * (trace_length - 1), 0, trace_length / 8192). mstore(0x5060, expmod(point, degreeAdjustment(/*composition_degree_bound*/ mload(0x3f20), mul(2, sub(/*trace_length*/ mload(0x80), 1)), 0, div(/*trace_length*/ mload(0x80), 8192)), PRIME)) // Adjustment polynomial for constraints 'ecdsa/signature0/r_and_w_nonzero'. // adjustments[20] = point^degreeAdjustment(composition_degree_bound, 2 * (trace_length - 1), 0, trace_length / 4096). mstore(0x5080, expmod(point, degreeAdjustment(/*composition_degree_bound*/ mload(0x3f20), mul(2, sub(/*trace_length*/ mload(0x80), 1)), 0, div(/*trace_length*/ mload(0x80), 4096)), PRIME)) // Adjustment polynomial for constraints 'ecdsa/pubkey_addr'. // adjustments[21] = point^degreeAdjustment(composition_degree_bound, trace_length - 1, 1, trace_length / 8192). mstore(0x50a0, expmod(point, degreeAdjustment(/*composition_degree_bound*/ mload(0x3f20), sub(/*trace_length*/ mload(0x80), 1), 1, div(/*trace_length*/ mload(0x80), 8192)), PRIME)) // Adjustment polynomial for constraints 'checkpoints/required_pc_next_addr', 'checkpoints/req_pc', 'checkpoints/req_fp'. // adjustments[22] = point^degreeAdjustment(composition_degree_bound, 2 * (trace_length - 1), 1, trace_length / 256). mstore(0x50c0, expmod(point, degreeAdjustment(/*composition_degree_bound*/ mload(0x3f20), mul(2, sub(/*trace_length*/ mload(0x80), 1)), 1, div(/*trace_length*/ mload(0x80), 256)), PRIME)) } { // Compute the result of the composition polynomial. { // cpu/decode/opcode_rc/bit_0 = column0_row0 - (column0_row1 + column0_row1). let val := addmod( /*column0_row0*/ mload(0x2980), sub( PRIME, addmod(/*column0_row1*/ mload(0x29a0), /*column0_row1*/ mload(0x29a0), PRIME)), PRIME) mstore(0x3f40, val) } { // cpu/decode/opcode_rc/bit_1 = column0_row1 - (column0_row2 + column0_row2). let val := addmod( /*column0_row1*/ mload(0x29a0), sub( PRIME, addmod(/*column0_row2*/ mload(0x29c0), /*column0_row2*/ mload(0x29c0), PRIME)), PRIME) mstore(0x3f60, val) } { // cpu/decode/opcode_rc/bit_2 = column0_row2 - (column0_row3 + column0_row3). let val := addmod( /*column0_row2*/ mload(0x29c0), sub( PRIME, addmod(/*column0_row3*/ mload(0x29e0), /*column0_row3*/ mload(0x29e0), PRIME)), PRIME) mstore(0x3f80, val) } { // cpu/decode/opcode_rc/bit_4 = column0_row4 - (column0_row5 + column0_row5). let val := addmod( /*column0_row4*/ mload(0x2a00), sub( PRIME, addmod(/*column0_row5*/ mload(0x2a20), /*column0_row5*/ mload(0x2a20), PRIME)), PRIME) mstore(0x3fa0, val) } { // cpu/decode/opcode_rc/bit_3 = column0_row3 - (column0_row4 + column0_row4). let val := addmod( /*column0_row3*/ mload(0x29e0), sub( PRIME, addmod(/*column0_row4*/ mload(0x2a00), /*column0_row4*/ mload(0x2a00), PRIME)), PRIME) mstore(0x3fc0, val) } { // cpu/decode/opcode_rc/bit_9 = column0_row9 - (column0_row10 + column0_row10). let val := addmod( /*column0_row9*/ mload(0x2aa0), sub( PRIME, addmod(/*column0_row10*/ mload(0x2ac0), /*column0_row10*/ mload(0x2ac0), PRIME)), PRIME) mstore(0x3fe0, val) } { // cpu/decode/opcode_rc/bit_5 = column0_row5 - (column0_row6 + column0_row6). let val := addmod( /*column0_row5*/ mload(0x2a20), sub( PRIME, addmod(/*column0_row6*/ mload(0x2a40), /*column0_row6*/ mload(0x2a40), PRIME)), PRIME) mstore(0x4000, val) } { // cpu/decode/opcode_rc/bit_6 = column0_row6 - (column0_row7 + column0_row7). let val := addmod( /*column0_row6*/ mload(0x2a40), sub( PRIME, addmod(/*column0_row7*/ mload(0x2a60), /*column0_row7*/ mload(0x2a60), PRIME)), PRIME) mstore(0x4020, val) } { // cpu/decode/opcode_rc/bit_7 = column0_row7 - (column0_row8 + column0_row8). let val := addmod( /*column0_row7*/ mload(0x2a60), sub( PRIME, addmod(/*column0_row8*/ mload(0x2a80), /*column0_row8*/ mload(0x2a80), PRIME)), PRIME) mstore(0x4040, val) } { // cpu/decode/opcode_rc/bit_8 = column0_row8 - (column0_row9 + column0_row9). let val := addmod( /*column0_row8*/ mload(0x2a80), sub( PRIME, addmod(/*column0_row9*/ mload(0x2aa0), /*column0_row9*/ mload(0x2aa0), PRIME)), PRIME) mstore(0x4060, val) } { // npc_reg_0 = column17_row0 + cpu__decode__opcode_rc__bit_2 + 1. let val := addmod( addmod( /*column17_row0*/ mload(0x3200), /*intermediate_value/cpu/decode/opcode_rc/bit_2*/ mload(0x3f80), PRIME), 1, PRIME) mstore(0x4080, val) } { // cpu/decode/opcode_rc/bit_10 = column0_row10 - (column0_row11 + column0_row11). let val := addmod( /*column0_row10*/ mload(0x2ac0), sub( PRIME, addmod(/*column0_row11*/ mload(0x2ae0), /*column0_row11*/ mload(0x2ae0), PRIME)), PRIME) mstore(0x40a0, val) } { // cpu/decode/opcode_rc/bit_11 = column0_row11 - (column0_row12 + column0_row12). let val := addmod( /*column0_row11*/ mload(0x2ae0), sub( PRIME, addmod(/*column0_row12*/ mload(0x2b00), /*column0_row12*/ mload(0x2b00), PRIME)), PRIME) mstore(0x40c0, val) } { // cpu/decode/opcode_rc/bit_12 = column0_row12 - (column0_row13 + column0_row13). let val := addmod( /*column0_row12*/ mload(0x2b00), sub( PRIME, addmod(/*column0_row13*/ mload(0x2b20), /*column0_row13*/ mload(0x2b20), PRIME)), PRIME) mstore(0x40e0, val) } { // cpu/decode/opcode_rc/bit_13 = column0_row13 - (column0_row14 + column0_row14). let val := addmod( /*column0_row13*/ mload(0x2b20), sub( PRIME, addmod(/*column0_row14*/ mload(0x2b40), /*column0_row14*/ mload(0x2b40), PRIME)), PRIME) mstore(0x4100, val) } { // cpu/decode/opcode_rc/bit_14 = column0_row14 - (column0_row15 + column0_row15). let val := addmod( /*column0_row14*/ mload(0x2b40), sub( PRIME, addmod(/*column0_row15*/ mload(0x2b60), /*column0_row15*/ mload(0x2b60), PRIME)), PRIME) mstore(0x4120, val) } { // memory/address_diff_0 = column18_row2 - column18_row0. let val := addmod(/*column18_row2*/ mload(0x3740), sub(PRIME, /*column18_row0*/ mload(0x3700)), PRIME) mstore(0x4140, val) } { // rc16/diff_0 = column19_row6 - column19_row2. let val := addmod(/*column19_row6*/ mload(0x3840), sub(PRIME, /*column19_row2*/ mload(0x37c0)), PRIME) mstore(0x4160, val) } { // pedersen/hash0/ec_subset_sum/bit_0 = column4_row0 - (column4_row1 + column4_row1). let val := addmod( /*column4_row0*/ mload(0x2cc0), sub( PRIME, addmod(/*column4_row1*/ mload(0x2ce0), /*column4_row1*/ mload(0x2ce0), PRIME)), PRIME) mstore(0x4180, val) } { // pedersen/hash0/ec_subset_sum/bit_neg_0 = 1 - pedersen__hash0__ec_subset_sum__bit_0. let val := addmod( 1, sub(PRIME, /*intermediate_value/pedersen/hash0/ec_subset_sum/bit_0*/ mload(0x4180)), PRIME) mstore(0x41a0, val) } { // pedersen/hash1/ec_subset_sum/bit_0 = column8_row0 - (column8_row1 + column8_row1). let val := addmod( /*column8_row0*/ mload(0x2e60), sub( PRIME, addmod(/*column8_row1*/ mload(0x2e80), /*column8_row1*/ mload(0x2e80), PRIME)), PRIME) mstore(0x41c0, val) } { // pedersen/hash1/ec_subset_sum/bit_neg_0 = 1 - pedersen__hash1__ec_subset_sum__bit_0. let val := addmod( 1, sub(PRIME, /*intermediate_value/pedersen/hash1/ec_subset_sum/bit_0*/ mload(0x41c0)), PRIME) mstore(0x41e0, val) } { // pedersen/hash2/ec_subset_sum/bit_0 = column12_row0 - (column12_row1 + column12_row1). let val := addmod( /*column12_row0*/ mload(0x3000), sub( PRIME, addmod(/*column12_row1*/ mload(0x3020), /*column12_row1*/ mload(0x3020), PRIME)), PRIME) mstore(0x4200, val) } { // pedersen/hash2/ec_subset_sum/bit_neg_0 = 1 - pedersen__hash2__ec_subset_sum__bit_0. let val := addmod( 1, sub(PRIME, /*intermediate_value/pedersen/hash2/ec_subset_sum/bit_0*/ mload(0x4200)), PRIME) mstore(0x4220, val) } { // pedersen/hash3/ec_subset_sum/bit_0 = column16_row0 - (column16_row1 + column16_row1). let val := addmod( /*column16_row0*/ mload(0x31a0), sub( PRIME, addmod(/*column16_row1*/ mload(0x31c0), /*column16_row1*/ mload(0x31c0), PRIME)), PRIME) mstore(0x4240, val) } { // pedersen/hash3/ec_subset_sum/bit_neg_0 = 1 - pedersen__hash3__ec_subset_sum__bit_0. let val := addmod( 1, sub(PRIME, /*intermediate_value/pedersen/hash3/ec_subset_sum/bit_0*/ mload(0x4240)), PRIME) mstore(0x4260, val) } { // rc_builtin/value0_0 = column19_row12. let val := /*column19_row12*/ mload(0x38e0) mstore(0x4280, val) } { // rc_builtin/value1_0 = rc_builtin__value0_0 * offset_size + column19_row28. let val := addmod( mulmod( /*intermediate_value/rc_builtin/value0_0*/ mload(0x4280), /*offset_size*/ mload(0xa0), PRIME), /*column19_row28*/ mload(0x39a0), PRIME) mstore(0x42a0, val) } { // rc_builtin/value2_0 = rc_builtin__value1_0 * offset_size + column19_row44. let val := addmod( mulmod( /*intermediate_value/rc_builtin/value1_0*/ mload(0x42a0), /*offset_size*/ mload(0xa0), PRIME), /*column19_row44*/ mload(0x39e0), PRIME) mstore(0x42c0, val) } { // rc_builtin/value3_0 = rc_builtin__value2_0 * offset_size + column19_row60. let val := addmod( mulmod( /*intermediate_value/rc_builtin/value2_0*/ mload(0x42c0), /*offset_size*/ mload(0xa0), PRIME), /*column19_row60*/ mload(0x3a00), PRIME) mstore(0x42e0, val) } { // rc_builtin/value4_0 = rc_builtin__value3_0 * offset_size + column19_row76. let val := addmod( mulmod( /*intermediate_value/rc_builtin/value3_0*/ mload(0x42e0), /*offset_size*/ mload(0xa0), PRIME), /*column19_row76*/ mload(0x3a20), PRIME) mstore(0x4300, val) } { // rc_builtin/value5_0 = rc_builtin__value4_0 * offset_size + column19_row92. let val := addmod( mulmod( /*intermediate_value/rc_builtin/value4_0*/ mload(0x4300), /*offset_size*/ mload(0xa0), PRIME), /*column19_row92*/ mload(0x3a40), PRIME) mstore(0x4320, val) } { // rc_builtin/value6_0 = rc_builtin__value5_0 * offset_size + column19_row108. let val := addmod( mulmod( /*intermediate_value/rc_builtin/value5_0*/ mload(0x4320), /*offset_size*/ mload(0xa0), PRIME), /*column19_row108*/ mload(0x3a60), PRIME) mstore(0x4340, val) } { // rc_builtin/value7_0 = rc_builtin__value6_0 * offset_size + column19_row124. let val := addmod( mulmod( /*intermediate_value/rc_builtin/value6_0*/ mload(0x4340), /*offset_size*/ mload(0xa0), PRIME), /*column19_row124*/ mload(0x3a80), PRIME) mstore(0x4360, val) } { // ecdsa/signature0/doubling_key/x_squared = column19_row7 * column19_row7. let val := mulmod(/*column19_row7*/ mload(0x3860), /*column19_row7*/ mload(0x3860), PRIME) mstore(0x4380, val) } { // ecdsa/signature0/exponentiate_generator/bit_0 = column20_row30 - (column20_row62 + column20_row62). let val := addmod( /*column20_row30*/ mload(0x3c80), sub( PRIME, addmod(/*column20_row62*/ mload(0x3ce0), /*column20_row62*/ mload(0x3ce0), PRIME)), PRIME) mstore(0x43a0, val) } { // ecdsa/signature0/exponentiate_generator/bit_neg_0 = 1 - ecdsa__signature0__exponentiate_generator__bit_0. let val := addmod( 1, sub( PRIME, /*intermediate_value/ecdsa/signature0/exponentiate_generator/bit_0*/ mload(0x43a0)), PRIME) mstore(0x43c0, val) } { // ecdsa/signature0/exponentiate_key/bit_0 = column20_row2 - (column20_row18 + column20_row18). let val := addmod( /*column20_row2*/ mload(0x3b20), sub( PRIME, addmod(/*column20_row18*/ mload(0x3c00), /*column20_row18*/ mload(0x3c00), PRIME)), PRIME) mstore(0x43e0, val) } { // ecdsa/signature0/exponentiate_key/bit_neg_0 = 1 - ecdsa__signature0__exponentiate_key__bit_0. let val := addmod( 1, sub( PRIME, /*intermediate_value/ecdsa/signature0/exponentiate_key/bit_0*/ mload(0x43e0)), PRIME) mstore(0x4400, val) } { // Constraint expression for cpu/decode/opcode_rc/bit: cpu__decode__opcode_rc__bit_0 * cpu__decode__opcode_rc__bit_0 - cpu__decode__opcode_rc__bit_0. let val := addmod( mulmod( /*intermediate_value/cpu/decode/opcode_rc/bit_0*/ mload(0x3f40), /*intermediate_value/cpu/decode/opcode_rc/bit_0*/ mload(0x3f40), PRIME), sub(PRIME, /*intermediate_value/cpu/decode/opcode_rc/bit_0*/ mload(0x3f40)), PRIME) // Numerator: point^(trace_length / 16) - trace_generator^(15 * trace_length / 16). // val *= numerators[0]. val := mulmod(val, mload(0x4ca0), PRIME) // Denominator: point^trace_length - 1. // val *= denominator_invs[0]. val := mulmod(val, mload(0x46e0), PRIME) // res += val * (coefficients[0] + coefficients[1] * adjustments[0]). res := addmod(res, mulmod(val, add(/*coefficients[0]*/ mload(0x440), mulmod(/*coefficients[1]*/ mload(0x460), /*adjustments[0]*/mload(0x4e00), PRIME)), PRIME), PRIME) } { // Constraint expression for cpu/decode/opcode_rc/last_bit: column0_row0 * column0_row0 - column0_row0. let val := addmod( mulmod(/*column0_row0*/ mload(0x2980), /*column0_row0*/ mload(0x2980), PRIME), sub(PRIME, /*column0_row0*/ mload(0x2980)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 16) - trace_generator^(15 * trace_length / 16). // val *= denominator_invs[1]. val := mulmod(val, mload(0x4700), PRIME) // res += val * (coefficients[2] + coefficients[3] * adjustments[1]). res := addmod(res, mulmod(val, add(/*coefficients[2]*/ mload(0x480), mulmod(/*coefficients[3]*/ mload(0x4a0), /*adjustments[1]*/mload(0x4e20), PRIME)), PRIME), PRIME) } { // Constraint expression for cpu/decode/opcode_rc_input: column17_row1 - (((column0_row0 * offset_size + column19_row4) * offset_size + column19_row8) * offset_size + column19_row0). let val := addmod( /*column17_row1*/ mload(0x3220), sub( PRIME, addmod( mulmod( addmod( mulmod( addmod( mulmod(/*column0_row0*/ mload(0x2980), /*offset_size*/ mload(0xa0), PRIME), /*column19_row4*/ mload(0x3800), PRIME), /*offset_size*/ mload(0xa0), PRIME), /*column19_row8*/ mload(0x3880), PRIME), /*offset_size*/ mload(0xa0), PRIME), /*column19_row0*/ mload(0x3780), PRIME)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 16) - 1. // val *= denominator_invs[2]. val := mulmod(val, mload(0x4720), PRIME) // res += val * (coefficients[4] + coefficients[5] * adjustments[2]). res := addmod(res, mulmod(val, add(/*coefficients[4]*/ mload(0x4c0), mulmod(/*coefficients[5]*/ mload(0x4e0), /*adjustments[2]*/mload(0x4e40), PRIME)), PRIME), PRIME) } { // Constraint expression for cpu/operands/mem_dst_addr: column17_row8 + half_offset_size - (cpu__decode__opcode_rc__bit_0 * column19_row9 + (1 - cpu__decode__opcode_rc__bit_0) * column19_row1 + column19_row0). let val := addmod( addmod(/*column17_row8*/ mload(0x3300), /*half_offset_size*/ mload(0xc0), PRIME), sub( PRIME, addmod( addmod( mulmod( /*intermediate_value/cpu/decode/opcode_rc/bit_0*/ mload(0x3f40), /*column19_row9*/ mload(0x38a0), PRIME), mulmod( addmod( 1, sub(PRIME, /*intermediate_value/cpu/decode/opcode_rc/bit_0*/ mload(0x3f40)), PRIME), /*column19_row1*/ mload(0x37a0), PRIME), PRIME), /*column19_row0*/ mload(0x3780), PRIME)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 16) - 1. // val *= denominator_invs[2]. val := mulmod(val, mload(0x4720), PRIME) // res += val * (coefficients[6] + coefficients[7] * adjustments[1]). res := addmod(res, mulmod(val, add(/*coefficients[6]*/ mload(0x500), mulmod(/*coefficients[7]*/ mload(0x520), /*adjustments[1]*/mload(0x4e20), PRIME)), PRIME), PRIME) } { // Constraint expression for cpu/operands/mem0_addr: column17_row4 + half_offset_size - (cpu__decode__opcode_rc__bit_1 * column19_row9 + (1 - cpu__decode__opcode_rc__bit_1) * column19_row1 + column19_row8). let val := addmod( addmod(/*column17_row4*/ mload(0x3280), /*half_offset_size*/ mload(0xc0), PRIME), sub( PRIME, addmod( addmod( mulmod( /*intermediate_value/cpu/decode/opcode_rc/bit_1*/ mload(0x3f60), /*column19_row9*/ mload(0x38a0), PRIME), mulmod( addmod( 1, sub(PRIME, /*intermediate_value/cpu/decode/opcode_rc/bit_1*/ mload(0x3f60)), PRIME), /*column19_row1*/ mload(0x37a0), PRIME), PRIME), /*column19_row8*/ mload(0x3880), PRIME)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 16) - 1. // val *= denominator_invs[2]. val := mulmod(val, mload(0x4720), PRIME) // res += val * (coefficients[8] + coefficients[9] * adjustments[1]). res := addmod(res, mulmod(val, add(/*coefficients[8]*/ mload(0x540), mulmod(/*coefficients[9]*/ mload(0x560), /*adjustments[1]*/mload(0x4e20), PRIME)), PRIME), PRIME) } { // Constraint expression for cpu/operands/mem1_addr: column17_row12 + half_offset_size - (cpu__decode__opcode_rc__bit_2 * column17_row0 + cpu__decode__opcode_rc__bit_4 * column19_row1 + cpu__decode__opcode_rc__bit_3 * column19_row9 + (1 - (cpu__decode__opcode_rc__bit_2 + cpu__decode__opcode_rc__bit_4 + cpu__decode__opcode_rc__bit_3)) * column17_row5 + column19_row4). let val := addmod( addmod(/*column17_row12*/ mload(0x3340), /*half_offset_size*/ mload(0xc0), PRIME), sub( PRIME, addmod( addmod( addmod( addmod( mulmod( /*intermediate_value/cpu/decode/opcode_rc/bit_2*/ mload(0x3f80), /*column17_row0*/ mload(0x3200), PRIME), mulmod( /*intermediate_value/cpu/decode/opcode_rc/bit_4*/ mload(0x3fa0), /*column19_row1*/ mload(0x37a0), PRIME), PRIME), mulmod( /*intermediate_value/cpu/decode/opcode_rc/bit_3*/ mload(0x3fc0), /*column19_row9*/ mload(0x38a0), PRIME), PRIME), mulmod( addmod( 1, sub( PRIME, addmod( addmod( /*intermediate_value/cpu/decode/opcode_rc/bit_2*/ mload(0x3f80), /*intermediate_value/cpu/decode/opcode_rc/bit_4*/ mload(0x3fa0), PRIME), /*intermediate_value/cpu/decode/opcode_rc/bit_3*/ mload(0x3fc0), PRIME)), PRIME), /*column17_row5*/ mload(0x32a0), PRIME), PRIME), /*column19_row4*/ mload(0x3800), PRIME)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 16) - 1. // val *= denominator_invs[2]. val := mulmod(val, mload(0x4720), PRIME) // res += val * (coefficients[10] + coefficients[11] * adjustments[1]). res := addmod(res, mulmod(val, add(/*coefficients[10]*/ mload(0x580), mulmod(/*coefficients[11]*/ mload(0x5a0), /*adjustments[1]*/mload(0x4e20), PRIME)), PRIME), PRIME) } { // Constraint expression for cpu/operands/ops_mul: column19_row5 - column17_row5 * column17_row13. let val := addmod( /*column19_row5*/ mload(0x3820), sub( PRIME, mulmod(/*column17_row5*/ mload(0x32a0), /*column17_row13*/ mload(0x3360), PRIME)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 16) - 1. // val *= denominator_invs[2]. val := mulmod(val, mload(0x4720), PRIME) // res += val * (coefficients[12] + coefficients[13] * adjustments[1]). res := addmod(res, mulmod(val, add(/*coefficients[12]*/ mload(0x5c0), mulmod(/*coefficients[13]*/ mload(0x5e0), /*adjustments[1]*/mload(0x4e20), PRIME)), PRIME), PRIME) } { // Constraint expression for cpu/operands/res: (1 - cpu__decode__opcode_rc__bit_9) * column19_row13 - (cpu__decode__opcode_rc__bit_5 * (column17_row5 + column17_row13) + cpu__decode__opcode_rc__bit_6 * column19_row5 + (1 - (cpu__decode__opcode_rc__bit_5 + cpu__decode__opcode_rc__bit_6 + cpu__decode__opcode_rc__bit_9)) * column17_row13). let val := addmod( mulmod( addmod( 1, sub(PRIME, /*intermediate_value/cpu/decode/opcode_rc/bit_9*/ mload(0x3fe0)), PRIME), /*column19_row13*/ mload(0x3900), PRIME), sub( PRIME, addmod( addmod( mulmod( /*intermediate_value/cpu/decode/opcode_rc/bit_5*/ mload(0x4000), addmod(/*column17_row5*/ mload(0x32a0), /*column17_row13*/ mload(0x3360), PRIME), PRIME), mulmod( /*intermediate_value/cpu/decode/opcode_rc/bit_6*/ mload(0x4020), /*column19_row5*/ mload(0x3820), PRIME), PRIME), mulmod( addmod( 1, sub( PRIME, addmod( addmod( /*intermediate_value/cpu/decode/opcode_rc/bit_5*/ mload(0x4000), /*intermediate_value/cpu/decode/opcode_rc/bit_6*/ mload(0x4020), PRIME), /*intermediate_value/cpu/decode/opcode_rc/bit_9*/ mload(0x3fe0), PRIME)), PRIME), /*column17_row13*/ mload(0x3360), PRIME), PRIME)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 16) - 1. // val *= denominator_invs[2]. val := mulmod(val, mload(0x4720), PRIME) // res += val * (coefficients[14] + coefficients[15] * adjustments[1]). res := addmod(res, mulmod(val, add(/*coefficients[14]*/ mload(0x600), mulmod(/*coefficients[15]*/ mload(0x620), /*adjustments[1]*/mload(0x4e20), PRIME)), PRIME), PRIME) } { // Constraint expression for cpu/update_registers/update_pc/tmp0: column19_row3 - cpu__decode__opcode_rc__bit_9 * column17_row9. let val := addmod( /*column19_row3*/ mload(0x37e0), sub( PRIME, mulmod( /*intermediate_value/cpu/decode/opcode_rc/bit_9*/ mload(0x3fe0), /*column17_row9*/ mload(0x3320), PRIME)), PRIME) // Numerator: point - trace_generator^(16 * (trace_length / 16 - 1)). // val *= numerators[1]. val := mulmod(val, mload(0x4cc0), PRIME) // Denominator: point^(trace_length / 16) - 1. // val *= denominator_invs[2]. val := mulmod(val, mload(0x4720), PRIME) // res += val * (coefficients[16] + coefficients[17] * adjustments[3]). res := addmod(res, mulmod(val, add(/*coefficients[16]*/ mload(0x640), mulmod(/*coefficients[17]*/ mload(0x660), /*adjustments[3]*/mload(0x4e60), PRIME)), PRIME), PRIME) } { // Constraint expression for cpu/update_registers/update_pc/tmp1: column19_row11 - column19_row3 * column19_row13. let val := addmod( /*column19_row11*/ mload(0x38c0), sub( PRIME, mulmod(/*column19_row3*/ mload(0x37e0), /*column19_row13*/ mload(0x3900), PRIME)), PRIME) // Numerator: point - trace_generator^(16 * (trace_length / 16 - 1)). // val *= numerators[1]. val := mulmod(val, mload(0x4cc0), PRIME) // Denominator: point^(trace_length / 16) - 1. // val *= denominator_invs[2]. val := mulmod(val, mload(0x4720), PRIME) // res += val * (coefficients[18] + coefficients[19] * adjustments[3]). res := addmod(res, mulmod(val, add(/*coefficients[18]*/ mload(0x680), mulmod(/*coefficients[19]*/ mload(0x6a0), /*adjustments[3]*/mload(0x4e60), PRIME)), PRIME), PRIME) } { // Constraint expression for cpu/update_registers/update_pc/pc_cond_negative: (1 - cpu__decode__opcode_rc__bit_9) * column17_row16 + column19_row3 * (column17_row16 - (column17_row0 + column17_row13)) - ((1 - (cpu__decode__opcode_rc__bit_7 + cpu__decode__opcode_rc__bit_8 + cpu__decode__opcode_rc__bit_9)) * npc_reg_0 + cpu__decode__opcode_rc__bit_7 * column19_row13 + cpu__decode__opcode_rc__bit_8 * (column17_row0 + column19_row13)). let val := addmod( addmod( mulmod( addmod( 1, sub(PRIME, /*intermediate_value/cpu/decode/opcode_rc/bit_9*/ mload(0x3fe0)), PRIME), /*column17_row16*/ mload(0x3380), PRIME), mulmod( /*column19_row3*/ mload(0x37e0), addmod( /*column17_row16*/ mload(0x3380), sub( PRIME, addmod(/*column17_row0*/ mload(0x3200), /*column17_row13*/ mload(0x3360), PRIME)), PRIME), PRIME), PRIME), sub( PRIME, addmod( addmod( mulmod( addmod( 1, sub( PRIME, addmod( addmod( /*intermediate_value/cpu/decode/opcode_rc/bit_7*/ mload(0x4040), /*intermediate_value/cpu/decode/opcode_rc/bit_8*/ mload(0x4060), PRIME), /*intermediate_value/cpu/decode/opcode_rc/bit_9*/ mload(0x3fe0), PRIME)), PRIME), /*intermediate_value/npc_reg_0*/ mload(0x4080), PRIME), mulmod( /*intermediate_value/cpu/decode/opcode_rc/bit_7*/ mload(0x4040), /*column19_row13*/ mload(0x3900), PRIME), PRIME), mulmod( /*intermediate_value/cpu/decode/opcode_rc/bit_8*/ mload(0x4060), addmod(/*column17_row0*/ mload(0x3200), /*column19_row13*/ mload(0x3900), PRIME), PRIME), PRIME)), PRIME) // Numerator: point - trace_generator^(16 * (trace_length / 16 - 1)). // val *= numerators[1]. val := mulmod(val, mload(0x4cc0), PRIME) // Denominator: point^(trace_length / 16) - 1. // val *= denominator_invs[2]. val := mulmod(val, mload(0x4720), PRIME) // res += val * (coefficients[20] + coefficients[21] * adjustments[3]). res := addmod(res, mulmod(val, add(/*coefficients[20]*/ mload(0x6c0), mulmod(/*coefficients[21]*/ mload(0x6e0), /*adjustments[3]*/mload(0x4e60), PRIME)), PRIME), PRIME) } { // Constraint expression for cpu/update_registers/update_pc/pc_cond_positive: (column19_row11 - cpu__decode__opcode_rc__bit_9) * (column17_row16 - npc_reg_0). let val := mulmod( addmod( /*column19_row11*/ mload(0x38c0), sub(PRIME, /*intermediate_value/cpu/decode/opcode_rc/bit_9*/ mload(0x3fe0)), PRIME), addmod( /*column17_row16*/ mload(0x3380), sub(PRIME, /*intermediate_value/npc_reg_0*/ mload(0x4080)), PRIME), PRIME) // Numerator: point - trace_generator^(16 * (trace_length / 16 - 1)). // val *= numerators[1]. val := mulmod(val, mload(0x4cc0), PRIME) // Denominator: point^(trace_length / 16) - 1. // val *= denominator_invs[2]. val := mulmod(val, mload(0x4720), PRIME) // res += val * (coefficients[22] + coefficients[23] * adjustments[3]). res := addmod(res, mulmod(val, add(/*coefficients[22]*/ mload(0x700), mulmod(/*coefficients[23]*/ mload(0x720), /*adjustments[3]*/mload(0x4e60), PRIME)), PRIME), PRIME) } { // Constraint expression for cpu/update_registers/update_ap/ap_update: column19_row17 - (column19_row1 + cpu__decode__opcode_rc__bit_10 * column19_row13 + cpu__decode__opcode_rc__bit_11 + cpu__decode__opcode_rc__bit_12 * 2). let val := addmod( /*column19_row17*/ mload(0x3940), sub( PRIME, addmod( addmod( addmod( /*column19_row1*/ mload(0x37a0), mulmod( /*intermediate_value/cpu/decode/opcode_rc/bit_10*/ mload(0x40a0), /*column19_row13*/ mload(0x3900), PRIME), PRIME), /*intermediate_value/cpu/decode/opcode_rc/bit_11*/ mload(0x40c0), PRIME), mulmod(/*intermediate_value/cpu/decode/opcode_rc/bit_12*/ mload(0x40e0), 2, PRIME), PRIME)), PRIME) // Numerator: point - trace_generator^(16 * (trace_length / 16 - 1)). // val *= numerators[1]. val := mulmod(val, mload(0x4cc0), PRIME) // Denominator: point^(trace_length / 16) - 1. // val *= denominator_invs[2]. val := mulmod(val, mload(0x4720), PRIME) // res += val * (coefficients[24] + coefficients[25] * adjustments[3]). res := addmod(res, mulmod(val, add(/*coefficients[24]*/ mload(0x740), mulmod(/*coefficients[25]*/ mload(0x760), /*adjustments[3]*/mload(0x4e60), PRIME)), PRIME), PRIME) } { // Constraint expression for cpu/update_registers/update_fp/fp_update: column19_row25 - ((1 - (cpu__decode__opcode_rc__bit_12 + cpu__decode__opcode_rc__bit_13)) * column19_row9 + cpu__decode__opcode_rc__bit_13 * column17_row9 + cpu__decode__opcode_rc__bit_12 * (column19_row1 + 2)). let val := addmod( /*column19_row25*/ mload(0x3980), sub( PRIME, addmod( addmod( mulmod( addmod( 1, sub( PRIME, addmod( /*intermediate_value/cpu/decode/opcode_rc/bit_12*/ mload(0x40e0), /*intermediate_value/cpu/decode/opcode_rc/bit_13*/ mload(0x4100), PRIME)), PRIME), /*column19_row9*/ mload(0x38a0), PRIME), mulmod( /*intermediate_value/cpu/decode/opcode_rc/bit_13*/ mload(0x4100), /*column17_row9*/ mload(0x3320), PRIME), PRIME), mulmod( /*intermediate_value/cpu/decode/opcode_rc/bit_12*/ mload(0x40e0), addmod(/*column19_row1*/ mload(0x37a0), 2, PRIME), PRIME), PRIME)), PRIME) // Numerator: point - trace_generator^(16 * (trace_length / 16 - 1)). // val *= numerators[1]. val := mulmod(val, mload(0x4cc0), PRIME) // Denominator: point^(trace_length / 16) - 1. // val *= denominator_invs[2]. val := mulmod(val, mload(0x4720), PRIME) // res += val * (coefficients[26] + coefficients[27] * adjustments[3]). res := addmod(res, mulmod(val, add(/*coefficients[26]*/ mload(0x780), mulmod(/*coefficients[27]*/ mload(0x7a0), /*adjustments[3]*/mload(0x4e60), PRIME)), PRIME), PRIME) } { // Constraint expression for cpu/opcodes/call/push_fp: cpu__decode__opcode_rc__bit_12 * (column17_row9 - column19_row9). let val := mulmod( /*intermediate_value/cpu/decode/opcode_rc/bit_12*/ mload(0x40e0), addmod(/*column17_row9*/ mload(0x3320), sub(PRIME, /*column19_row9*/ mload(0x38a0)), PRIME), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 16) - 1. // val *= denominator_invs[2]. val := mulmod(val, mload(0x4720), PRIME) // res += val * (coefficients[28] + coefficients[29] * adjustments[1]). res := addmod(res, mulmod(val, add(/*coefficients[28]*/ mload(0x7c0), mulmod(/*coefficients[29]*/ mload(0x7e0), /*adjustments[1]*/mload(0x4e20), PRIME)), PRIME), PRIME) } { // Constraint expression for cpu/opcodes/call/push_pc: cpu__decode__opcode_rc__bit_12 * (column17_row5 - (column17_row0 + cpu__decode__opcode_rc__bit_2 + 1)). let val := mulmod( /*intermediate_value/cpu/decode/opcode_rc/bit_12*/ mload(0x40e0), addmod( /*column17_row5*/ mload(0x32a0), sub( PRIME, addmod( addmod( /*column17_row0*/ mload(0x3200), /*intermediate_value/cpu/decode/opcode_rc/bit_2*/ mload(0x3f80), PRIME), 1, PRIME)), PRIME), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 16) - 1. // val *= denominator_invs[2]. val := mulmod(val, mload(0x4720), PRIME) // res += val * (coefficients[30] + coefficients[31] * adjustments[1]). res := addmod(res, mulmod(val, add(/*coefficients[30]*/ mload(0x800), mulmod(/*coefficients[31]*/ mload(0x820), /*adjustments[1]*/mload(0x4e20), PRIME)), PRIME), PRIME) } { // Constraint expression for cpu/opcodes/assert_eq/assert_eq: cpu__decode__opcode_rc__bit_14 * (column17_row9 - column19_row13). let val := mulmod( /*intermediate_value/cpu/decode/opcode_rc/bit_14*/ mload(0x4120), addmod( /*column17_row9*/ mload(0x3320), sub(PRIME, /*column19_row13*/ mload(0x3900)), PRIME), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 16) - 1. // val *= denominator_invs[2]. val := mulmod(val, mload(0x4720), PRIME) // res += val * (coefficients[32] + coefficients[33] * adjustments[1]). res := addmod(res, mulmod(val, add(/*coefficients[32]*/ mload(0x840), mulmod(/*coefficients[33]*/ mload(0x860), /*adjustments[1]*/mload(0x4e20), PRIME)), PRIME), PRIME) } { // Constraint expression for initial_ap: column19_row1 - initial_ap. let val := addmod(/*column19_row1*/ mload(0x37a0), sub(PRIME, /*initial_ap*/ mload(0xe0)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point - 1. // val *= denominator_invs[3]. val := mulmod(val, mload(0x4740), PRIME) // res += val * (coefficients[34] + coefficients[35] * adjustments[4]). res := addmod(res, mulmod(val, add(/*coefficients[34]*/ mload(0x880), mulmod(/*coefficients[35]*/ mload(0x8a0), /*adjustments[4]*/mload(0x4e80), PRIME)), PRIME), PRIME) } { // Constraint expression for initial_fp: column19_row9 - initial_ap. let val := addmod(/*column19_row9*/ mload(0x38a0), sub(PRIME, /*initial_ap*/ mload(0xe0)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point - 1. // val *= denominator_invs[3]. val := mulmod(val, mload(0x4740), PRIME) // res += val * (coefficients[36] + coefficients[37] * adjustments[4]). res := addmod(res, mulmod(val, add(/*coefficients[36]*/ mload(0x8c0), mulmod(/*coefficients[37]*/ mload(0x8e0), /*adjustments[4]*/mload(0x4e80), PRIME)), PRIME), PRIME) } { // Constraint expression for initial_pc: column17_row0 - initial_pc. let val := addmod(/*column17_row0*/ mload(0x3200), sub(PRIME, /*initial_pc*/ mload(0x100)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point - 1. // val *= denominator_invs[3]. val := mulmod(val, mload(0x4740), PRIME) // res += val * (coefficients[38] + coefficients[39] * adjustments[4]). res := addmod(res, mulmod(val, add(/*coefficients[38]*/ mload(0x900), mulmod(/*coefficients[39]*/ mload(0x920), /*adjustments[4]*/mload(0x4e80), PRIME)), PRIME), PRIME) } { // Constraint expression for final_ap: column19_row1 - final_ap. let val := addmod(/*column19_row1*/ mload(0x37a0), sub(PRIME, /*final_ap*/ mload(0x120)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point - trace_generator^(16 * (trace_length / 16 - 1)). // val *= denominator_invs[4]. val := mulmod(val, mload(0x4760), PRIME) // res += val * (coefficients[40] + coefficients[41] * adjustments[4]). res := addmod(res, mulmod(val, add(/*coefficients[40]*/ mload(0x940), mulmod(/*coefficients[41]*/ mload(0x960), /*adjustments[4]*/mload(0x4e80), PRIME)), PRIME), PRIME) } { // Constraint expression for final_pc: column17_row0 - final_pc. let val := addmod(/*column17_row0*/ mload(0x3200), sub(PRIME, /*final_pc*/ mload(0x140)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point - trace_generator^(16 * (trace_length / 16 - 1)). // val *= denominator_invs[4]. val := mulmod(val, mload(0x4760), PRIME) // res += val * (coefficients[42] + coefficients[43] * adjustments[4]). res := addmod(res, mulmod(val, add(/*coefficients[42]*/ mload(0x980), mulmod(/*coefficients[43]*/ mload(0x9a0), /*adjustments[4]*/mload(0x4e80), PRIME)), PRIME), PRIME) } { // Constraint expression for memory/multi_column_perm/perm/init0: (memory/multi_column_perm/perm/interaction_elm - (column18_row0 + memory/multi_column_perm/hash_interaction_elm0 * column18_row1)) * column21_inter1_row0 + column17_row0 + memory/multi_column_perm/hash_interaction_elm0 * column17_row1 - memory/multi_column_perm/perm/interaction_elm. let val := addmod( addmod( addmod( mulmod( addmod( /*memory/multi_column_perm/perm/interaction_elm*/ mload(0x160), sub( PRIME, addmod( /*column18_row0*/ mload(0x3700), mulmod( /*memory/multi_column_perm/hash_interaction_elm0*/ mload(0x180), /*column18_row1*/ mload(0x3720), PRIME), PRIME)), PRIME), /*column21_inter1_row0*/ mload(0x3ea0), PRIME), /*column17_row0*/ mload(0x3200), PRIME), mulmod( /*memory/multi_column_perm/hash_interaction_elm0*/ mload(0x180), /*column17_row1*/ mload(0x3220), PRIME), PRIME), sub(PRIME, /*memory/multi_column_perm/perm/interaction_elm*/ mload(0x160)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point - 1. // val *= denominator_invs[3]. val := mulmod(val, mload(0x4740), PRIME) // res += val * (coefficients[44] + coefficients[45] * adjustments[5]). res := addmod(res, mulmod(val, add(/*coefficients[44]*/ mload(0x9c0), mulmod(/*coefficients[45]*/ mload(0x9e0), /*adjustments[5]*/mload(0x4ea0), PRIME)), PRIME), PRIME) } { // Constraint expression for memory/multi_column_perm/perm/step0: (memory/multi_column_perm/perm/interaction_elm - (column18_row2 + memory/multi_column_perm/hash_interaction_elm0 * column18_row3)) * column21_inter1_row2 - (memory/multi_column_perm/perm/interaction_elm - (column17_row2 + memory/multi_column_perm/hash_interaction_elm0 * column17_row3)) * column21_inter1_row0. let val := addmod( mulmod( addmod( /*memory/multi_column_perm/perm/interaction_elm*/ mload(0x160), sub( PRIME, addmod( /*column18_row2*/ mload(0x3740), mulmod( /*memory/multi_column_perm/hash_interaction_elm0*/ mload(0x180), /*column18_row3*/ mload(0x3760), PRIME), PRIME)), PRIME), /*column21_inter1_row2*/ mload(0x3ee0), PRIME), sub( PRIME, mulmod( addmod( /*memory/multi_column_perm/perm/interaction_elm*/ mload(0x160), sub( PRIME, addmod( /*column17_row2*/ mload(0x3240), mulmod( /*memory/multi_column_perm/hash_interaction_elm0*/ mload(0x180), /*column17_row3*/ mload(0x3260), PRIME), PRIME)), PRIME), /*column21_inter1_row0*/ mload(0x3ea0), PRIME)), PRIME) // Numerator: point - trace_generator^(2 * (trace_length / 2 - 1)). // val *= numerators[2]. val := mulmod(val, mload(0x4ce0), PRIME) // Denominator: point^(trace_length / 2) - 1. // val *= denominator_invs[5]. val := mulmod(val, mload(0x4780), PRIME) // res += val * (coefficients[46] + coefficients[47] * adjustments[6]). res := addmod(res, mulmod(val, add(/*coefficients[46]*/ mload(0xa00), mulmod(/*coefficients[47]*/ mload(0xa20), /*adjustments[6]*/mload(0x4ec0), PRIME)), PRIME), PRIME) } { // Constraint expression for memory/multi_column_perm/perm/last: column21_inter1_row0 - memory/multi_column_perm/perm/public_memory_prod. let val := addmod( /*column21_inter1_row0*/ mload(0x3ea0), sub(PRIME, /*memory/multi_column_perm/perm/public_memory_prod*/ mload(0x1a0)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point - trace_generator^(2 * (trace_length / 2 - 1)). // val *= denominator_invs[6]. val := mulmod(val, mload(0x47a0), PRIME) // res += val * (coefficients[48] + coefficients[49] * adjustments[4]). res := addmod(res, mulmod(val, add(/*coefficients[48]*/ mload(0xa40), mulmod(/*coefficients[49]*/ mload(0xa60), /*adjustments[4]*/mload(0x4e80), PRIME)), PRIME), PRIME) } { // Constraint expression for memory/diff_is_bit: memory__address_diff_0 * memory__address_diff_0 - memory__address_diff_0. let val := addmod( mulmod( /*intermediate_value/memory/address_diff_0*/ mload(0x4140), /*intermediate_value/memory/address_diff_0*/ mload(0x4140), PRIME), sub(PRIME, /*intermediate_value/memory/address_diff_0*/ mload(0x4140)), PRIME) // Numerator: point - trace_generator^(2 * (trace_length / 2 - 1)). // val *= numerators[2]. val := mulmod(val, mload(0x4ce0), PRIME) // Denominator: point^(trace_length / 2) - 1. // val *= denominator_invs[5]. val := mulmod(val, mload(0x4780), PRIME) // res += val * (coefficients[50] + coefficients[51] * adjustments[6]). res := addmod(res, mulmod(val, add(/*coefficients[50]*/ mload(0xa80), mulmod(/*coefficients[51]*/ mload(0xaa0), /*adjustments[6]*/mload(0x4ec0), PRIME)), PRIME), PRIME) } { // Constraint expression for memory/is_func: (memory__address_diff_0 - 1) * (column18_row1 - column18_row3). let val := mulmod( addmod(/*intermediate_value/memory/address_diff_0*/ mload(0x4140), sub(PRIME, 1), PRIME), addmod(/*column18_row1*/ mload(0x3720), sub(PRIME, /*column18_row3*/ mload(0x3760)), PRIME), PRIME) // Numerator: point - trace_generator^(2 * (trace_length / 2 - 1)). // val *= numerators[2]. val := mulmod(val, mload(0x4ce0), PRIME) // Denominator: point^(trace_length / 2) - 1. // val *= denominator_invs[5]. val := mulmod(val, mload(0x4780), PRIME) // res += val * (coefficients[52] + coefficients[53] * adjustments[6]). res := addmod(res, mulmod(val, add(/*coefficients[52]*/ mload(0xac0), mulmod(/*coefficients[53]*/ mload(0xae0), /*adjustments[6]*/mload(0x4ec0), PRIME)), PRIME), PRIME) } { // Constraint expression for public_memory_addr_zero: column17_row2. let val := /*column17_row2*/ mload(0x3240) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 8) - 1. // val *= denominator_invs[7]. val := mulmod(val, mload(0x47c0), PRIME) // res += val * (coefficients[54] + coefficients[55] * adjustments[7]). res := addmod(res, mulmod(val, add(/*coefficients[54]*/ mload(0xb00), mulmod(/*coefficients[55]*/ mload(0xb20), /*adjustments[7]*/mload(0x4ee0), PRIME)), PRIME), PRIME) } { // Constraint expression for public_memory_value_zero: column17_row3. let val := /*column17_row3*/ mload(0x3260) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 8) - 1. // val *= denominator_invs[7]. val := mulmod(val, mload(0x47c0), PRIME) // res += val * (coefficients[56] + coefficients[57] * adjustments[7]). res := addmod(res, mulmod(val, add(/*coefficients[56]*/ mload(0xb40), mulmod(/*coefficients[57]*/ mload(0xb60), /*adjustments[7]*/mload(0x4ee0), PRIME)), PRIME), PRIME) } { // Constraint expression for rc16/perm/init0: (rc16/perm/interaction_elm - column19_row2) * column21_inter1_row1 + column19_row0 - rc16/perm/interaction_elm. let val := addmod( addmod( mulmod( addmod( /*rc16/perm/interaction_elm*/ mload(0x1c0), sub(PRIME, /*column19_row2*/ mload(0x37c0)), PRIME), /*column21_inter1_row1*/ mload(0x3ec0), PRIME), /*column19_row0*/ mload(0x3780), PRIME), sub(PRIME, /*rc16/perm/interaction_elm*/ mload(0x1c0)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point - 1. // val *= denominator_invs[3]. val := mulmod(val, mload(0x4740), PRIME) // res += val * (coefficients[58] + coefficients[59] * adjustments[5]). res := addmod(res, mulmod(val, add(/*coefficients[58]*/ mload(0xb80), mulmod(/*coefficients[59]*/ mload(0xba0), /*adjustments[5]*/mload(0x4ea0), PRIME)), PRIME), PRIME) } { // Constraint expression for rc16/perm/step0: (rc16/perm/interaction_elm - column19_row6) * column21_inter1_row5 - (rc16/perm/interaction_elm - column19_row4) * column21_inter1_row1. let val := addmod( mulmod( addmod( /*rc16/perm/interaction_elm*/ mload(0x1c0), sub(PRIME, /*column19_row6*/ mload(0x3840)), PRIME), /*column21_inter1_row5*/ mload(0x3f00), PRIME), sub( PRIME, mulmod( addmod( /*rc16/perm/interaction_elm*/ mload(0x1c0), sub(PRIME, /*column19_row4*/ mload(0x3800)), PRIME), /*column21_inter1_row1*/ mload(0x3ec0), PRIME)), PRIME) // Numerator: point - trace_generator^(4 * (trace_length / 4 - 1)). // val *= numerators[3]. val := mulmod(val, mload(0x4d00), PRIME) // Denominator: point^(trace_length / 4) - 1. // val *= denominator_invs[8]. val := mulmod(val, mload(0x47e0), PRIME) // res += val * (coefficients[60] + coefficients[61] * adjustments[8]). res := addmod(res, mulmod(val, add(/*coefficients[60]*/ mload(0xbc0), mulmod(/*coefficients[61]*/ mload(0xbe0), /*adjustments[8]*/mload(0x4f00), PRIME)), PRIME), PRIME) } { // Constraint expression for rc16/perm/last: column21_inter1_row1 - rc16/perm/public_memory_prod. let val := addmod( /*column21_inter1_row1*/ mload(0x3ec0), sub(PRIME, /*rc16/perm/public_memory_prod*/ mload(0x1e0)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point - trace_generator^(4 * (trace_length / 4 - 1)). // val *= denominator_invs[9]. val := mulmod(val, mload(0x4800), PRIME) // res += val * (coefficients[62] + coefficients[63] * adjustments[4]). res := addmod(res, mulmod(val, add(/*coefficients[62]*/ mload(0xc00), mulmod(/*coefficients[63]*/ mload(0xc20), /*adjustments[4]*/mload(0x4e80), PRIME)), PRIME), PRIME) } { // Constraint expression for rc16/diff_is_bit: rc16__diff_0 * rc16__diff_0 - rc16__diff_0. let val := addmod( mulmod( /*intermediate_value/rc16/diff_0*/ mload(0x4160), /*intermediate_value/rc16/diff_0*/ mload(0x4160), PRIME), sub(PRIME, /*intermediate_value/rc16/diff_0*/ mload(0x4160)), PRIME) // Numerator: point - trace_generator^(4 * (trace_length / 4 - 1)). // val *= numerators[3]. val := mulmod(val, mload(0x4d00), PRIME) // Denominator: point^(trace_length / 4) - 1. // val *= denominator_invs[8]. val := mulmod(val, mload(0x47e0), PRIME) // res += val * (coefficients[64] + coefficients[65] * adjustments[8]). res := addmod(res, mulmod(val, add(/*coefficients[64]*/ mload(0xc40), mulmod(/*coefficients[65]*/ mload(0xc60), /*adjustments[8]*/mload(0x4f00), PRIME)), PRIME), PRIME) } { // Constraint expression for rc16/minimum: column19_row2 - rc_min. let val := addmod(/*column19_row2*/ mload(0x37c0), sub(PRIME, /*rc_min*/ mload(0x200)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point - 1. // val *= denominator_invs[3]. val := mulmod(val, mload(0x4740), PRIME) // res += val * (coefficients[66] + coefficients[67] * adjustments[4]). res := addmod(res, mulmod(val, add(/*coefficients[66]*/ mload(0xc80), mulmod(/*coefficients[67]*/ mload(0xca0), /*adjustments[4]*/mload(0x4e80), PRIME)), PRIME), PRIME) } { // Constraint expression for rc16/maximum: column19_row2 - rc_max. let val := addmod(/*column19_row2*/ mload(0x37c0), sub(PRIME, /*rc_max*/ mload(0x220)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point - trace_generator^(4 * (trace_length / 4 - 1)). // val *= denominator_invs[9]. val := mulmod(val, mload(0x4800), PRIME) // res += val * (coefficients[68] + coefficients[69] * adjustments[4]). res := addmod(res, mulmod(val, add(/*coefficients[68]*/ mload(0xcc0), mulmod(/*coefficients[69]*/ mload(0xce0), /*adjustments[4]*/mload(0x4e80), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/hash0/ec_subset_sum/booleanity_test: pedersen__hash0__ec_subset_sum__bit_0 * (pedersen__hash0__ec_subset_sum__bit_0 - 1). let val := mulmod( /*intermediate_value/pedersen/hash0/ec_subset_sum/bit_0*/ mload(0x4180), addmod( /*intermediate_value/pedersen/hash0/ec_subset_sum/bit_0*/ mload(0x4180), sub(PRIME, 1), PRIME), PRIME) // Numerator: point^(trace_length / 256) - trace_generator^(255 * trace_length / 256). // val *= numerators[4]. val := mulmod(val, mload(0x4d20), PRIME) // Denominator: point^trace_length - 1. // val *= denominator_invs[0]. val := mulmod(val, mload(0x46e0), PRIME) // res += val * (coefficients[70] + coefficients[71] * adjustments[9]). res := addmod(res, mulmod(val, add(/*coefficients[70]*/ mload(0xd00), mulmod(/*coefficients[71]*/ mload(0xd20), /*adjustments[9]*/mload(0x4f20), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/hash0/ec_subset_sum/bit_extraction_end: column4_row0. let val := /*column4_row0*/ mload(0x2cc0) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 256) - trace_generator^(63 * trace_length / 64). // val *= denominator_invs[10]. val := mulmod(val, mload(0x4820), PRIME) // res += val * (coefficients[72] + coefficients[73] * adjustments[10]). res := addmod(res, mulmod(val, add(/*coefficients[72]*/ mload(0xd40), mulmod(/*coefficients[73]*/ mload(0xd60), /*adjustments[10]*/mload(0x4f40), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/hash0/ec_subset_sum/zeros_tail: column4_row0. let val := /*column4_row0*/ mload(0x2cc0) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 256) - trace_generator^(255 * trace_length / 256). // val *= denominator_invs[11]. val := mulmod(val, mload(0x4840), PRIME) // res += val * (coefficients[74] + coefficients[75] * adjustments[10]). res := addmod(res, mulmod(val, add(/*coefficients[74]*/ mload(0xd80), mulmod(/*coefficients[75]*/ mload(0xda0), /*adjustments[10]*/mload(0x4f40), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/hash0/ec_subset_sum/add_points/slope: pedersen__hash0__ec_subset_sum__bit_0 * (column2_row0 - pedersen__points__y) - column3_row0 * (column1_row0 - pedersen__points__x). let val := addmod( mulmod( /*intermediate_value/pedersen/hash0/ec_subset_sum/bit_0*/ mload(0x4180), addmod( /*column2_row0*/ mload(0x2c20), sub(PRIME, /*periodic_column/pedersen/points/y*/ mload(0x20)), PRIME), PRIME), sub( PRIME, mulmod( /*column3_row0*/ mload(0x2ca0), addmod( /*column1_row0*/ mload(0x2b80), sub(PRIME, /*periodic_column/pedersen/points/x*/ mload(0x0)), PRIME), PRIME)), PRIME) // Numerator: point^(trace_length / 256) - trace_generator^(255 * trace_length / 256). // val *= numerators[4]. val := mulmod(val, mload(0x4d20), PRIME) // Denominator: point^trace_length - 1. // val *= denominator_invs[0]. val := mulmod(val, mload(0x46e0), PRIME) // res += val * (coefficients[76] + coefficients[77] * adjustments[9]). res := addmod(res, mulmod(val, add(/*coefficients[76]*/ mload(0xdc0), mulmod(/*coefficients[77]*/ mload(0xde0), /*adjustments[9]*/mload(0x4f20), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/hash0/ec_subset_sum/add_points/x: column3_row0 * column3_row0 - pedersen__hash0__ec_subset_sum__bit_0 * (column1_row0 + pedersen__points__x + column1_row1). let val := addmod( mulmod(/*column3_row0*/ mload(0x2ca0), /*column3_row0*/ mload(0x2ca0), PRIME), sub( PRIME, mulmod( /*intermediate_value/pedersen/hash0/ec_subset_sum/bit_0*/ mload(0x4180), addmod( addmod( /*column1_row0*/ mload(0x2b80), /*periodic_column/pedersen/points/x*/ mload(0x0), PRIME), /*column1_row1*/ mload(0x2ba0), PRIME), PRIME)), PRIME) // Numerator: point^(trace_length / 256) - trace_generator^(255 * trace_length / 256). // val *= numerators[4]. val := mulmod(val, mload(0x4d20), PRIME) // Denominator: point^trace_length - 1. // val *= denominator_invs[0]. val := mulmod(val, mload(0x46e0), PRIME) // res += val * (coefficients[78] + coefficients[79] * adjustments[9]). res := addmod(res, mulmod(val, add(/*coefficients[78]*/ mload(0xe00), mulmod(/*coefficients[79]*/ mload(0xe20), /*adjustments[9]*/mload(0x4f20), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/hash0/ec_subset_sum/add_points/y: pedersen__hash0__ec_subset_sum__bit_0 * (column2_row0 + column2_row1) - column3_row0 * (column1_row0 - column1_row1). let val := addmod( mulmod( /*intermediate_value/pedersen/hash0/ec_subset_sum/bit_0*/ mload(0x4180), addmod(/*column2_row0*/ mload(0x2c20), /*column2_row1*/ mload(0x2c40), PRIME), PRIME), sub( PRIME, mulmod( /*column3_row0*/ mload(0x2ca0), addmod(/*column1_row0*/ mload(0x2b80), sub(PRIME, /*column1_row1*/ mload(0x2ba0)), PRIME), PRIME)), PRIME) // Numerator: point^(trace_length / 256) - trace_generator^(255 * trace_length / 256). // val *= numerators[4]. val := mulmod(val, mload(0x4d20), PRIME) // Denominator: point^trace_length - 1. // val *= denominator_invs[0]. val := mulmod(val, mload(0x46e0), PRIME) // res += val * (coefficients[80] + coefficients[81] * adjustments[9]). res := addmod(res, mulmod(val, add(/*coefficients[80]*/ mload(0xe40), mulmod(/*coefficients[81]*/ mload(0xe60), /*adjustments[9]*/mload(0x4f20), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/hash0/ec_subset_sum/copy_point/x: pedersen__hash0__ec_subset_sum__bit_neg_0 * (column1_row1 - column1_row0). let val := mulmod( /*intermediate_value/pedersen/hash0/ec_subset_sum/bit_neg_0*/ mload(0x41a0), addmod(/*column1_row1*/ mload(0x2ba0), sub(PRIME, /*column1_row0*/ mload(0x2b80)), PRIME), PRIME) // Numerator: point^(trace_length / 256) - trace_generator^(255 * trace_length / 256). // val *= numerators[4]. val := mulmod(val, mload(0x4d20), PRIME) // Denominator: point^trace_length - 1. // val *= denominator_invs[0]. val := mulmod(val, mload(0x46e0), PRIME) // res += val * (coefficients[82] + coefficients[83] * adjustments[9]). res := addmod(res, mulmod(val, add(/*coefficients[82]*/ mload(0xe80), mulmod(/*coefficients[83]*/ mload(0xea0), /*adjustments[9]*/mload(0x4f20), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/hash0/ec_subset_sum/copy_point/y: pedersen__hash0__ec_subset_sum__bit_neg_0 * (column2_row1 - column2_row0). let val := mulmod( /*intermediate_value/pedersen/hash0/ec_subset_sum/bit_neg_0*/ mload(0x41a0), addmod(/*column2_row1*/ mload(0x2c40), sub(PRIME, /*column2_row0*/ mload(0x2c20)), PRIME), PRIME) // Numerator: point^(trace_length / 256) - trace_generator^(255 * trace_length / 256). // val *= numerators[4]. val := mulmod(val, mload(0x4d20), PRIME) // Denominator: point^trace_length - 1. // val *= denominator_invs[0]. val := mulmod(val, mload(0x46e0), PRIME) // res += val * (coefficients[84] + coefficients[85] * adjustments[9]). res := addmod(res, mulmod(val, add(/*coefficients[84]*/ mload(0xec0), mulmod(/*coefficients[85]*/ mload(0xee0), /*adjustments[9]*/mload(0x4f20), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/hash0/copy_point/x: column1_row256 - column1_row255. let val := addmod( /*column1_row256*/ mload(0x2be0), sub(PRIME, /*column1_row255*/ mload(0x2bc0)), PRIME) // Numerator: point^(trace_length / 512) - trace_generator^(trace_length / 2). // val *= numerators[5]. val := mulmod(val, mload(0x4d40), PRIME) // Denominator: point^(trace_length / 256) - 1. // val *= denominator_invs[12]. val := mulmod(val, mload(0x4860), PRIME) // res += val * (coefficients[86] + coefficients[87] * adjustments[11]). res := addmod(res, mulmod(val, add(/*coefficients[86]*/ mload(0xf00), mulmod(/*coefficients[87]*/ mload(0xf20), /*adjustments[11]*/mload(0x4f60), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/hash0/copy_point/y: column2_row256 - column2_row255. let val := addmod( /*column2_row256*/ mload(0x2c80), sub(PRIME, /*column2_row255*/ mload(0x2c60)), PRIME) // Numerator: point^(trace_length / 512) - trace_generator^(trace_length / 2). // val *= numerators[5]. val := mulmod(val, mload(0x4d40), PRIME) // Denominator: point^(trace_length / 256) - 1. // val *= denominator_invs[12]. val := mulmod(val, mload(0x4860), PRIME) // res += val * (coefficients[88] + coefficients[89] * adjustments[11]). res := addmod(res, mulmod(val, add(/*coefficients[88]*/ mload(0xf40), mulmod(/*coefficients[89]*/ mload(0xf60), /*adjustments[11]*/mload(0x4f60), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/hash0/init/x: column1_row0 - pedersen/shift_point.x. let val := addmod( /*column1_row0*/ mload(0x2b80), sub(PRIME, /*pedersen/shift_point.x*/ mload(0x240)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 512) - 1. // val *= denominator_invs[13]. val := mulmod(val, mload(0x4880), PRIME) // res += val * (coefficients[90] + coefficients[91] * adjustments[12]). res := addmod(res, mulmod(val, add(/*coefficients[90]*/ mload(0xf80), mulmod(/*coefficients[91]*/ mload(0xfa0), /*adjustments[12]*/mload(0x4f80), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/hash0/init/y: column2_row0 - pedersen/shift_point.y. let val := addmod( /*column2_row0*/ mload(0x2c20), sub(PRIME, /*pedersen/shift_point.y*/ mload(0x260)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 512) - 1. // val *= denominator_invs[13]. val := mulmod(val, mload(0x4880), PRIME) // res += val * (coefficients[92] + coefficients[93] * adjustments[12]). res := addmod(res, mulmod(val, add(/*coefficients[92]*/ mload(0xfc0), mulmod(/*coefficients[93]*/ mload(0xfe0), /*adjustments[12]*/mload(0x4f80), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/hash1/ec_subset_sum/booleanity_test: pedersen__hash1__ec_subset_sum__bit_0 * (pedersen__hash1__ec_subset_sum__bit_0 - 1). let val := mulmod( /*intermediate_value/pedersen/hash1/ec_subset_sum/bit_0*/ mload(0x41c0), addmod( /*intermediate_value/pedersen/hash1/ec_subset_sum/bit_0*/ mload(0x41c0), sub(PRIME, 1), PRIME), PRIME) // Numerator: point^(trace_length / 256) - trace_generator^(255 * trace_length / 256). // val *= numerators[4]. val := mulmod(val, mload(0x4d20), PRIME) // Denominator: point^trace_length - 1. // val *= denominator_invs[0]. val := mulmod(val, mload(0x46e0), PRIME) // res += val * (coefficients[94] + coefficients[95] * adjustments[9]). res := addmod(res, mulmod(val, add(/*coefficients[94]*/ mload(0x1000), mulmod(/*coefficients[95]*/ mload(0x1020), /*adjustments[9]*/mload(0x4f20), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/hash1/ec_subset_sum/bit_extraction_end: column8_row0. let val := /*column8_row0*/ mload(0x2e60) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 256) - trace_generator^(63 * trace_length / 64). // val *= denominator_invs[10]. val := mulmod(val, mload(0x4820), PRIME) // res += val * (coefficients[96] + coefficients[97] * adjustments[10]). res := addmod(res, mulmod(val, add(/*coefficients[96]*/ mload(0x1040), mulmod(/*coefficients[97]*/ mload(0x1060), /*adjustments[10]*/mload(0x4f40), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/hash1/ec_subset_sum/zeros_tail: column8_row0. let val := /*column8_row0*/ mload(0x2e60) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 256) - trace_generator^(255 * trace_length / 256). // val *= denominator_invs[11]. val := mulmod(val, mload(0x4840), PRIME) // res += val * (coefficients[98] + coefficients[99] * adjustments[10]). res := addmod(res, mulmod(val, add(/*coefficients[98]*/ mload(0x1080), mulmod(/*coefficients[99]*/ mload(0x10a0), /*adjustments[10]*/mload(0x4f40), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/hash1/ec_subset_sum/add_points/slope: pedersen__hash1__ec_subset_sum__bit_0 * (column6_row0 - pedersen__points__y) - column7_row0 * (column5_row0 - pedersen__points__x). let val := addmod( mulmod( /*intermediate_value/pedersen/hash1/ec_subset_sum/bit_0*/ mload(0x41c0), addmod( /*column6_row0*/ mload(0x2dc0), sub(PRIME, /*periodic_column/pedersen/points/y*/ mload(0x20)), PRIME), PRIME), sub( PRIME, mulmod( /*column7_row0*/ mload(0x2e40), addmod( /*column5_row0*/ mload(0x2d20), sub(PRIME, /*periodic_column/pedersen/points/x*/ mload(0x0)), PRIME), PRIME)), PRIME) // Numerator: point^(trace_length / 256) - trace_generator^(255 * trace_length / 256). // val *= numerators[4]. val := mulmod(val, mload(0x4d20), PRIME) // Denominator: point^trace_length - 1. // val *= denominator_invs[0]. val := mulmod(val, mload(0x46e0), PRIME) // res += val * (coefficients[100] + coefficients[101] * adjustments[9]). res := addmod(res, mulmod(val, add(/*coefficients[100]*/ mload(0x10c0), mulmod(/*coefficients[101]*/ mload(0x10e0), /*adjustments[9]*/mload(0x4f20), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/hash1/ec_subset_sum/add_points/x: column7_row0 * column7_row0 - pedersen__hash1__ec_subset_sum__bit_0 * (column5_row0 + pedersen__points__x + column5_row1). let val := addmod( mulmod(/*column7_row0*/ mload(0x2e40), /*column7_row0*/ mload(0x2e40), PRIME), sub( PRIME, mulmod( /*intermediate_value/pedersen/hash1/ec_subset_sum/bit_0*/ mload(0x41c0), addmod( addmod( /*column5_row0*/ mload(0x2d20), /*periodic_column/pedersen/points/x*/ mload(0x0), PRIME), /*column5_row1*/ mload(0x2d40), PRIME), PRIME)), PRIME) // Numerator: point^(trace_length / 256) - trace_generator^(255 * trace_length / 256). // val *= numerators[4]. val := mulmod(val, mload(0x4d20), PRIME) // Denominator: point^trace_length - 1. // val *= denominator_invs[0]. val := mulmod(val, mload(0x46e0), PRIME) // res += val * (coefficients[102] + coefficients[103] * adjustments[9]). res := addmod(res, mulmod(val, add(/*coefficients[102]*/ mload(0x1100), mulmod(/*coefficients[103]*/ mload(0x1120), /*adjustments[9]*/mload(0x4f20), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/hash1/ec_subset_sum/add_points/y: pedersen__hash1__ec_subset_sum__bit_0 * (column6_row0 + column6_row1) - column7_row0 * (column5_row0 - column5_row1). let val := addmod( mulmod( /*intermediate_value/pedersen/hash1/ec_subset_sum/bit_0*/ mload(0x41c0), addmod(/*column6_row0*/ mload(0x2dc0), /*column6_row1*/ mload(0x2de0), PRIME), PRIME), sub( PRIME, mulmod( /*column7_row0*/ mload(0x2e40), addmod(/*column5_row0*/ mload(0x2d20), sub(PRIME, /*column5_row1*/ mload(0x2d40)), PRIME), PRIME)), PRIME) // Numerator: point^(trace_length / 256) - trace_generator^(255 * trace_length / 256). // val *= numerators[4]. val := mulmod(val, mload(0x4d20), PRIME) // Denominator: point^trace_length - 1. // val *= denominator_invs[0]. val := mulmod(val, mload(0x46e0), PRIME) // res += val * (coefficients[104] + coefficients[105] * adjustments[9]). res := addmod(res, mulmod(val, add(/*coefficients[104]*/ mload(0x1140), mulmod(/*coefficients[105]*/ mload(0x1160), /*adjustments[9]*/mload(0x4f20), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/hash1/ec_subset_sum/copy_point/x: pedersen__hash1__ec_subset_sum__bit_neg_0 * (column5_row1 - column5_row0). let val := mulmod( /*intermediate_value/pedersen/hash1/ec_subset_sum/bit_neg_0*/ mload(0x41e0), addmod(/*column5_row1*/ mload(0x2d40), sub(PRIME, /*column5_row0*/ mload(0x2d20)), PRIME), PRIME) // Numerator: point^(trace_length / 256) - trace_generator^(255 * trace_length / 256). // val *= numerators[4]. val := mulmod(val, mload(0x4d20), PRIME) // Denominator: point^trace_length - 1. // val *= denominator_invs[0]. val := mulmod(val, mload(0x46e0), PRIME) // res += val * (coefficients[106] + coefficients[107] * adjustments[9]). res := addmod(res, mulmod(val, add(/*coefficients[106]*/ mload(0x1180), mulmod(/*coefficients[107]*/ mload(0x11a0), /*adjustments[9]*/mload(0x4f20), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/hash1/ec_subset_sum/copy_point/y: pedersen__hash1__ec_subset_sum__bit_neg_0 * (column6_row1 - column6_row0). let val := mulmod( /*intermediate_value/pedersen/hash1/ec_subset_sum/bit_neg_0*/ mload(0x41e0), addmod(/*column6_row1*/ mload(0x2de0), sub(PRIME, /*column6_row0*/ mload(0x2dc0)), PRIME), PRIME) // Numerator: point^(trace_length / 256) - trace_generator^(255 * trace_length / 256). // val *= numerators[4]. val := mulmod(val, mload(0x4d20), PRIME) // Denominator: point^trace_length - 1. // val *= denominator_invs[0]. val := mulmod(val, mload(0x46e0), PRIME) // res += val * (coefficients[108] + coefficients[109] * adjustments[9]). res := addmod(res, mulmod(val, add(/*coefficients[108]*/ mload(0x11c0), mulmod(/*coefficients[109]*/ mload(0x11e0), /*adjustments[9]*/mload(0x4f20), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/hash1/copy_point/x: column5_row256 - column5_row255. let val := addmod( /*column5_row256*/ mload(0x2d80), sub(PRIME, /*column5_row255*/ mload(0x2d60)), PRIME) // Numerator: point^(trace_length / 512) - trace_generator^(trace_length / 2). // val *= numerators[5]. val := mulmod(val, mload(0x4d40), PRIME) // Denominator: point^(trace_length / 256) - 1. // val *= denominator_invs[12]. val := mulmod(val, mload(0x4860), PRIME) // res += val * (coefficients[110] + coefficients[111] * adjustments[11]). res := addmod(res, mulmod(val, add(/*coefficients[110]*/ mload(0x1200), mulmod(/*coefficients[111]*/ mload(0x1220), /*adjustments[11]*/mload(0x4f60), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/hash1/copy_point/y: column6_row256 - column6_row255. let val := addmod( /*column6_row256*/ mload(0x2e20), sub(PRIME, /*column6_row255*/ mload(0x2e00)), PRIME) // Numerator: point^(trace_length / 512) - trace_generator^(trace_length / 2). // val *= numerators[5]. val := mulmod(val, mload(0x4d40), PRIME) // Denominator: point^(trace_length / 256) - 1. // val *= denominator_invs[12]. val := mulmod(val, mload(0x4860), PRIME) // res += val * (coefficients[112] + coefficients[113] * adjustments[11]). res := addmod(res, mulmod(val, add(/*coefficients[112]*/ mload(0x1240), mulmod(/*coefficients[113]*/ mload(0x1260), /*adjustments[11]*/mload(0x4f60), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/hash1/init/x: column5_row0 - pedersen/shift_point.x. let val := addmod( /*column5_row0*/ mload(0x2d20), sub(PRIME, /*pedersen/shift_point.x*/ mload(0x240)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 512) - 1. // val *= denominator_invs[13]. val := mulmod(val, mload(0x4880), PRIME) // res += val * (coefficients[114] + coefficients[115] * adjustments[12]). res := addmod(res, mulmod(val, add(/*coefficients[114]*/ mload(0x1280), mulmod(/*coefficients[115]*/ mload(0x12a0), /*adjustments[12]*/mload(0x4f80), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/hash1/init/y: column6_row0 - pedersen/shift_point.y. let val := addmod( /*column6_row0*/ mload(0x2dc0), sub(PRIME, /*pedersen/shift_point.y*/ mload(0x260)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 512) - 1. // val *= denominator_invs[13]. val := mulmod(val, mload(0x4880), PRIME) // res += val * (coefficients[116] + coefficients[117] * adjustments[12]). res := addmod(res, mulmod(val, add(/*coefficients[116]*/ mload(0x12c0), mulmod(/*coefficients[117]*/ mload(0x12e0), /*adjustments[12]*/mload(0x4f80), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/hash2/ec_subset_sum/booleanity_test: pedersen__hash2__ec_subset_sum__bit_0 * (pedersen__hash2__ec_subset_sum__bit_0 - 1). let val := mulmod( /*intermediate_value/pedersen/hash2/ec_subset_sum/bit_0*/ mload(0x4200), addmod( /*intermediate_value/pedersen/hash2/ec_subset_sum/bit_0*/ mload(0x4200), sub(PRIME, 1), PRIME), PRIME) // Numerator: point^(trace_length / 256) - trace_generator^(255 * trace_length / 256). // val *= numerators[4]. val := mulmod(val, mload(0x4d20), PRIME) // Denominator: point^trace_length - 1. // val *= denominator_invs[0]. val := mulmod(val, mload(0x46e0), PRIME) // res += val * (coefficients[118] + coefficients[119] * adjustments[9]). res := addmod(res, mulmod(val, add(/*coefficients[118]*/ mload(0x1300), mulmod(/*coefficients[119]*/ mload(0x1320), /*adjustments[9]*/mload(0x4f20), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/hash2/ec_subset_sum/bit_extraction_end: column12_row0. let val := /*column12_row0*/ mload(0x3000) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 256) - trace_generator^(63 * trace_length / 64). // val *= denominator_invs[10]. val := mulmod(val, mload(0x4820), PRIME) // res += val * (coefficients[120] + coefficients[121] * adjustments[10]). res := addmod(res, mulmod(val, add(/*coefficients[120]*/ mload(0x1340), mulmod(/*coefficients[121]*/ mload(0x1360), /*adjustments[10]*/mload(0x4f40), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/hash2/ec_subset_sum/zeros_tail: column12_row0. let val := /*column12_row0*/ mload(0x3000) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 256) - trace_generator^(255 * trace_length / 256). // val *= denominator_invs[11]. val := mulmod(val, mload(0x4840), PRIME) // res += val * (coefficients[122] + coefficients[123] * adjustments[10]). res := addmod(res, mulmod(val, add(/*coefficients[122]*/ mload(0x1380), mulmod(/*coefficients[123]*/ mload(0x13a0), /*adjustments[10]*/mload(0x4f40), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/hash2/ec_subset_sum/add_points/slope: pedersen__hash2__ec_subset_sum__bit_0 * (column10_row0 - pedersen__points__y) - column11_row0 * (column9_row0 - pedersen__points__x). let val := addmod( mulmod( /*intermediate_value/pedersen/hash2/ec_subset_sum/bit_0*/ mload(0x4200), addmod( /*column10_row0*/ mload(0x2f60), sub(PRIME, /*periodic_column/pedersen/points/y*/ mload(0x20)), PRIME), PRIME), sub( PRIME, mulmod( /*column11_row0*/ mload(0x2fe0), addmod( /*column9_row0*/ mload(0x2ec0), sub(PRIME, /*periodic_column/pedersen/points/x*/ mload(0x0)), PRIME), PRIME)), PRIME) // Numerator: point^(trace_length / 256) - trace_generator^(255 * trace_length / 256). // val *= numerators[4]. val := mulmod(val, mload(0x4d20), PRIME) // Denominator: point^trace_length - 1. // val *= denominator_invs[0]. val := mulmod(val, mload(0x46e0), PRIME) // res += val * (coefficients[124] + coefficients[125] * adjustments[9]). res := addmod(res, mulmod(val, add(/*coefficients[124]*/ mload(0x13c0), mulmod(/*coefficients[125]*/ mload(0x13e0), /*adjustments[9]*/mload(0x4f20), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/hash2/ec_subset_sum/add_points/x: column11_row0 * column11_row0 - pedersen__hash2__ec_subset_sum__bit_0 * (column9_row0 + pedersen__points__x + column9_row1). let val := addmod( mulmod(/*column11_row0*/ mload(0x2fe0), /*column11_row0*/ mload(0x2fe0), PRIME), sub( PRIME, mulmod( /*intermediate_value/pedersen/hash2/ec_subset_sum/bit_0*/ mload(0x4200), addmod( addmod( /*column9_row0*/ mload(0x2ec0), /*periodic_column/pedersen/points/x*/ mload(0x0), PRIME), /*column9_row1*/ mload(0x2ee0), PRIME), PRIME)), PRIME) // Numerator: point^(trace_length / 256) - trace_generator^(255 * trace_length / 256). // val *= numerators[4]. val := mulmod(val, mload(0x4d20), PRIME) // Denominator: point^trace_length - 1. // val *= denominator_invs[0]. val := mulmod(val, mload(0x46e0), PRIME) // res += val * (coefficients[126] + coefficients[127] * adjustments[9]). res := addmod(res, mulmod(val, add(/*coefficients[126]*/ mload(0x1400), mulmod(/*coefficients[127]*/ mload(0x1420), /*adjustments[9]*/mload(0x4f20), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/hash2/ec_subset_sum/add_points/y: pedersen__hash2__ec_subset_sum__bit_0 * (column10_row0 + column10_row1) - column11_row0 * (column9_row0 - column9_row1). let val := addmod( mulmod( /*intermediate_value/pedersen/hash2/ec_subset_sum/bit_0*/ mload(0x4200), addmod(/*column10_row0*/ mload(0x2f60), /*column10_row1*/ mload(0x2f80), PRIME), PRIME), sub( PRIME, mulmod( /*column11_row0*/ mload(0x2fe0), addmod(/*column9_row0*/ mload(0x2ec0), sub(PRIME, /*column9_row1*/ mload(0x2ee0)), PRIME), PRIME)), PRIME) // Numerator: point^(trace_length / 256) - trace_generator^(255 * trace_length / 256). // val *= numerators[4]. val := mulmod(val, mload(0x4d20), PRIME) // Denominator: point^trace_length - 1. // val *= denominator_invs[0]. val := mulmod(val, mload(0x46e0), PRIME) // res += val * (coefficients[128] + coefficients[129] * adjustments[9]). res := addmod(res, mulmod(val, add(/*coefficients[128]*/ mload(0x1440), mulmod(/*coefficients[129]*/ mload(0x1460), /*adjustments[9]*/mload(0x4f20), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/hash2/ec_subset_sum/copy_point/x: pedersen__hash2__ec_subset_sum__bit_neg_0 * (column9_row1 - column9_row0). let val := mulmod( /*intermediate_value/pedersen/hash2/ec_subset_sum/bit_neg_0*/ mload(0x4220), addmod(/*column9_row1*/ mload(0x2ee0), sub(PRIME, /*column9_row0*/ mload(0x2ec0)), PRIME), PRIME) // Numerator: point^(trace_length / 256) - trace_generator^(255 * trace_length / 256). // val *= numerators[4]. val := mulmod(val, mload(0x4d20), PRIME) // Denominator: point^trace_length - 1. // val *= denominator_invs[0]. val := mulmod(val, mload(0x46e0), PRIME) // res += val * (coefficients[130] + coefficients[131] * adjustments[9]). res := addmod(res, mulmod(val, add(/*coefficients[130]*/ mload(0x1480), mulmod(/*coefficients[131]*/ mload(0x14a0), /*adjustments[9]*/mload(0x4f20), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/hash2/ec_subset_sum/copy_point/y: pedersen__hash2__ec_subset_sum__bit_neg_0 * (column10_row1 - column10_row0). let val := mulmod( /*intermediate_value/pedersen/hash2/ec_subset_sum/bit_neg_0*/ mload(0x4220), addmod(/*column10_row1*/ mload(0x2f80), sub(PRIME, /*column10_row0*/ mload(0x2f60)), PRIME), PRIME) // Numerator: point^(trace_length / 256) - trace_generator^(255 * trace_length / 256). // val *= numerators[4]. val := mulmod(val, mload(0x4d20), PRIME) // Denominator: point^trace_length - 1. // val *= denominator_invs[0]. val := mulmod(val, mload(0x46e0), PRIME) // res += val * (coefficients[132] + coefficients[133] * adjustments[9]). res := addmod(res, mulmod(val, add(/*coefficients[132]*/ mload(0x14c0), mulmod(/*coefficients[133]*/ mload(0x14e0), /*adjustments[9]*/mload(0x4f20), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/hash2/copy_point/x: column9_row256 - column9_row255. let val := addmod( /*column9_row256*/ mload(0x2f20), sub(PRIME, /*column9_row255*/ mload(0x2f00)), PRIME) // Numerator: point^(trace_length / 512) - trace_generator^(trace_length / 2). // val *= numerators[5]. val := mulmod(val, mload(0x4d40), PRIME) // Denominator: point^(trace_length / 256) - 1. // val *= denominator_invs[12]. val := mulmod(val, mload(0x4860), PRIME) // res += val * (coefficients[134] + coefficients[135] * adjustments[11]). res := addmod(res, mulmod(val, add(/*coefficients[134]*/ mload(0x1500), mulmod(/*coefficients[135]*/ mload(0x1520), /*adjustments[11]*/mload(0x4f60), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/hash2/copy_point/y: column10_row256 - column10_row255. let val := addmod( /*column10_row256*/ mload(0x2fc0), sub(PRIME, /*column10_row255*/ mload(0x2fa0)), PRIME) // Numerator: point^(trace_length / 512) - trace_generator^(trace_length / 2). // val *= numerators[5]. val := mulmod(val, mload(0x4d40), PRIME) // Denominator: point^(trace_length / 256) - 1. // val *= denominator_invs[12]. val := mulmod(val, mload(0x4860), PRIME) // res += val * (coefficients[136] + coefficients[137] * adjustments[11]). res := addmod(res, mulmod(val, add(/*coefficients[136]*/ mload(0x1540), mulmod(/*coefficients[137]*/ mload(0x1560), /*adjustments[11]*/mload(0x4f60), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/hash2/init/x: column9_row0 - pedersen/shift_point.x. let val := addmod( /*column9_row0*/ mload(0x2ec0), sub(PRIME, /*pedersen/shift_point.x*/ mload(0x240)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 512) - 1. // val *= denominator_invs[13]. val := mulmod(val, mload(0x4880), PRIME) // res += val * (coefficients[138] + coefficients[139] * adjustments[12]). res := addmod(res, mulmod(val, add(/*coefficients[138]*/ mload(0x1580), mulmod(/*coefficients[139]*/ mload(0x15a0), /*adjustments[12]*/mload(0x4f80), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/hash2/init/y: column10_row0 - pedersen/shift_point.y. let val := addmod( /*column10_row0*/ mload(0x2f60), sub(PRIME, /*pedersen/shift_point.y*/ mload(0x260)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 512) - 1. // val *= denominator_invs[13]. val := mulmod(val, mload(0x4880), PRIME) // res += val * (coefficients[140] + coefficients[141] * adjustments[12]). res := addmod(res, mulmod(val, add(/*coefficients[140]*/ mload(0x15c0), mulmod(/*coefficients[141]*/ mload(0x15e0), /*adjustments[12]*/mload(0x4f80), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/hash3/ec_subset_sum/booleanity_test: pedersen__hash3__ec_subset_sum__bit_0 * (pedersen__hash3__ec_subset_sum__bit_0 - 1). let val := mulmod( /*intermediate_value/pedersen/hash3/ec_subset_sum/bit_0*/ mload(0x4240), addmod( /*intermediate_value/pedersen/hash3/ec_subset_sum/bit_0*/ mload(0x4240), sub(PRIME, 1), PRIME), PRIME) // Numerator: point^(trace_length / 256) - trace_generator^(255 * trace_length / 256). // val *= numerators[4]. val := mulmod(val, mload(0x4d20), PRIME) // Denominator: point^trace_length - 1. // val *= denominator_invs[0]. val := mulmod(val, mload(0x46e0), PRIME) // res += val * (coefficients[142] + coefficients[143] * adjustments[9]). res := addmod(res, mulmod(val, add(/*coefficients[142]*/ mload(0x1600), mulmod(/*coefficients[143]*/ mload(0x1620), /*adjustments[9]*/mload(0x4f20), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/hash3/ec_subset_sum/bit_extraction_end: column16_row0. let val := /*column16_row0*/ mload(0x31a0) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 256) - trace_generator^(63 * trace_length / 64). // val *= denominator_invs[10]. val := mulmod(val, mload(0x4820), PRIME) // res += val * (coefficients[144] + coefficients[145] * adjustments[10]). res := addmod(res, mulmod(val, add(/*coefficients[144]*/ mload(0x1640), mulmod(/*coefficients[145]*/ mload(0x1660), /*adjustments[10]*/mload(0x4f40), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/hash3/ec_subset_sum/zeros_tail: column16_row0. let val := /*column16_row0*/ mload(0x31a0) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 256) - trace_generator^(255 * trace_length / 256). // val *= denominator_invs[11]. val := mulmod(val, mload(0x4840), PRIME) // res += val * (coefficients[146] + coefficients[147] * adjustments[10]). res := addmod(res, mulmod(val, add(/*coefficients[146]*/ mload(0x1680), mulmod(/*coefficients[147]*/ mload(0x16a0), /*adjustments[10]*/mload(0x4f40), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/hash3/ec_subset_sum/add_points/slope: pedersen__hash3__ec_subset_sum__bit_0 * (column14_row0 - pedersen__points__y) - column15_row0 * (column13_row0 - pedersen__points__x). let val := addmod( mulmod( /*intermediate_value/pedersen/hash3/ec_subset_sum/bit_0*/ mload(0x4240), addmod( /*column14_row0*/ mload(0x3100), sub(PRIME, /*periodic_column/pedersen/points/y*/ mload(0x20)), PRIME), PRIME), sub( PRIME, mulmod( /*column15_row0*/ mload(0x3180), addmod( /*column13_row0*/ mload(0x3060), sub(PRIME, /*periodic_column/pedersen/points/x*/ mload(0x0)), PRIME), PRIME)), PRIME) // Numerator: point^(trace_length / 256) - trace_generator^(255 * trace_length / 256). // val *= numerators[4]. val := mulmod(val, mload(0x4d20), PRIME) // Denominator: point^trace_length - 1. // val *= denominator_invs[0]. val := mulmod(val, mload(0x46e0), PRIME) // res += val * (coefficients[148] + coefficients[149] * adjustments[9]). res := addmod(res, mulmod(val, add(/*coefficients[148]*/ mload(0x16c0), mulmod(/*coefficients[149]*/ mload(0x16e0), /*adjustments[9]*/mload(0x4f20), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/hash3/ec_subset_sum/add_points/x: column15_row0 * column15_row0 - pedersen__hash3__ec_subset_sum__bit_0 * (column13_row0 + pedersen__points__x + column13_row1). let val := addmod( mulmod(/*column15_row0*/ mload(0x3180), /*column15_row0*/ mload(0x3180), PRIME), sub( PRIME, mulmod( /*intermediate_value/pedersen/hash3/ec_subset_sum/bit_0*/ mload(0x4240), addmod( addmod( /*column13_row0*/ mload(0x3060), /*periodic_column/pedersen/points/x*/ mload(0x0), PRIME), /*column13_row1*/ mload(0x3080), PRIME), PRIME)), PRIME) // Numerator: point^(trace_length / 256) - trace_generator^(255 * trace_length / 256). // val *= numerators[4]. val := mulmod(val, mload(0x4d20), PRIME) // Denominator: point^trace_length - 1. // val *= denominator_invs[0]. val := mulmod(val, mload(0x46e0), PRIME) // res += val * (coefficients[150] + coefficients[151] * adjustments[9]). res := addmod(res, mulmod(val, add(/*coefficients[150]*/ mload(0x1700), mulmod(/*coefficients[151]*/ mload(0x1720), /*adjustments[9]*/mload(0x4f20), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/hash3/ec_subset_sum/add_points/y: pedersen__hash3__ec_subset_sum__bit_0 * (column14_row0 + column14_row1) - column15_row0 * (column13_row0 - column13_row1). let val := addmod( mulmod( /*intermediate_value/pedersen/hash3/ec_subset_sum/bit_0*/ mload(0x4240), addmod(/*column14_row0*/ mload(0x3100), /*column14_row1*/ mload(0x3120), PRIME), PRIME), sub( PRIME, mulmod( /*column15_row0*/ mload(0x3180), addmod(/*column13_row0*/ mload(0x3060), sub(PRIME, /*column13_row1*/ mload(0x3080)), PRIME), PRIME)), PRIME) // Numerator: point^(trace_length / 256) - trace_generator^(255 * trace_length / 256). // val *= numerators[4]. val := mulmod(val, mload(0x4d20), PRIME) // Denominator: point^trace_length - 1. // val *= denominator_invs[0]. val := mulmod(val, mload(0x46e0), PRIME) // res += val * (coefficients[152] + coefficients[153] * adjustments[9]). res := addmod(res, mulmod(val, add(/*coefficients[152]*/ mload(0x1740), mulmod(/*coefficients[153]*/ mload(0x1760), /*adjustments[9]*/mload(0x4f20), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/hash3/ec_subset_sum/copy_point/x: pedersen__hash3__ec_subset_sum__bit_neg_0 * (column13_row1 - column13_row0). let val := mulmod( /*intermediate_value/pedersen/hash3/ec_subset_sum/bit_neg_0*/ mload(0x4260), addmod(/*column13_row1*/ mload(0x3080), sub(PRIME, /*column13_row0*/ mload(0x3060)), PRIME), PRIME) // Numerator: point^(trace_length / 256) - trace_generator^(255 * trace_length / 256). // val *= numerators[4]. val := mulmod(val, mload(0x4d20), PRIME) // Denominator: point^trace_length - 1. // val *= denominator_invs[0]. val := mulmod(val, mload(0x46e0), PRIME) // res += val * (coefficients[154] + coefficients[155] * adjustments[9]). res := addmod(res, mulmod(val, add(/*coefficients[154]*/ mload(0x1780), mulmod(/*coefficients[155]*/ mload(0x17a0), /*adjustments[9]*/mload(0x4f20), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/hash3/ec_subset_sum/copy_point/y: pedersen__hash3__ec_subset_sum__bit_neg_0 * (column14_row1 - column14_row0). let val := mulmod( /*intermediate_value/pedersen/hash3/ec_subset_sum/bit_neg_0*/ mload(0x4260), addmod(/*column14_row1*/ mload(0x3120), sub(PRIME, /*column14_row0*/ mload(0x3100)), PRIME), PRIME) // Numerator: point^(trace_length / 256) - trace_generator^(255 * trace_length / 256). // val *= numerators[4]. val := mulmod(val, mload(0x4d20), PRIME) // Denominator: point^trace_length - 1. // val *= denominator_invs[0]. val := mulmod(val, mload(0x46e0), PRIME) // res += val * (coefficients[156] + coefficients[157] * adjustments[9]). res := addmod(res, mulmod(val, add(/*coefficients[156]*/ mload(0x17c0), mulmod(/*coefficients[157]*/ mload(0x17e0), /*adjustments[9]*/mload(0x4f20), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/hash3/copy_point/x: column13_row256 - column13_row255. let val := addmod( /*column13_row256*/ mload(0x30c0), sub(PRIME, /*column13_row255*/ mload(0x30a0)), PRIME) // Numerator: point^(trace_length / 512) - trace_generator^(trace_length / 2). // val *= numerators[5]. val := mulmod(val, mload(0x4d40), PRIME) // Denominator: point^(trace_length / 256) - 1. // val *= denominator_invs[12]. val := mulmod(val, mload(0x4860), PRIME) // res += val * (coefficients[158] + coefficients[159] * adjustments[11]). res := addmod(res, mulmod(val, add(/*coefficients[158]*/ mload(0x1800), mulmod(/*coefficients[159]*/ mload(0x1820), /*adjustments[11]*/mload(0x4f60), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/hash3/copy_point/y: column14_row256 - column14_row255. let val := addmod( /*column14_row256*/ mload(0x3160), sub(PRIME, /*column14_row255*/ mload(0x3140)), PRIME) // Numerator: point^(trace_length / 512) - trace_generator^(trace_length / 2). // val *= numerators[5]. val := mulmod(val, mload(0x4d40), PRIME) // Denominator: point^(trace_length / 256) - 1. // val *= denominator_invs[12]. val := mulmod(val, mload(0x4860), PRIME) // res += val * (coefficients[160] + coefficients[161] * adjustments[11]). res := addmod(res, mulmod(val, add(/*coefficients[160]*/ mload(0x1840), mulmod(/*coefficients[161]*/ mload(0x1860), /*adjustments[11]*/mload(0x4f60), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/hash3/init/x: column13_row0 - pedersen/shift_point.x. let val := addmod( /*column13_row0*/ mload(0x3060), sub(PRIME, /*pedersen/shift_point.x*/ mload(0x240)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 512) - 1. // val *= denominator_invs[13]. val := mulmod(val, mload(0x4880), PRIME) // res += val * (coefficients[162] + coefficients[163] * adjustments[12]). res := addmod(res, mulmod(val, add(/*coefficients[162]*/ mload(0x1880), mulmod(/*coefficients[163]*/ mload(0x18a0), /*adjustments[12]*/mload(0x4f80), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/hash3/init/y: column14_row0 - pedersen/shift_point.y. let val := addmod( /*column14_row0*/ mload(0x3100), sub(PRIME, /*pedersen/shift_point.y*/ mload(0x260)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 512) - 1. // val *= denominator_invs[13]. val := mulmod(val, mload(0x4880), PRIME) // res += val * (coefficients[164] + coefficients[165] * adjustments[12]). res := addmod(res, mulmod(val, add(/*coefficients[164]*/ mload(0x18c0), mulmod(/*coefficients[165]*/ mload(0x18e0), /*adjustments[12]*/mload(0x4f80), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/input0_value0: column17_row7 - column4_row0. let val := addmod(/*column17_row7*/ mload(0x32e0), sub(PRIME, /*column4_row0*/ mload(0x2cc0)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 512) - 1. // val *= denominator_invs[13]. val := mulmod(val, mload(0x4880), PRIME) // res += val * (coefficients[166] + coefficients[167] * adjustments[12]). res := addmod(res, mulmod(val, add(/*coefficients[166]*/ mload(0x1900), mulmod(/*coefficients[167]*/ mload(0x1920), /*adjustments[12]*/mload(0x4f80), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/input0_value1: column17_row135 - column8_row0. let val := addmod( /*column17_row135*/ mload(0x3500), sub(PRIME, /*column8_row0*/ mload(0x2e60)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 512) - 1. // val *= denominator_invs[13]. val := mulmod(val, mload(0x4880), PRIME) // res += val * (coefficients[168] + coefficients[169] * adjustments[12]). res := addmod(res, mulmod(val, add(/*coefficients[168]*/ mload(0x1940), mulmod(/*coefficients[169]*/ mload(0x1960), /*adjustments[12]*/mload(0x4f80), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/input0_value2: column17_row263 - column12_row0. let val := addmod( /*column17_row263*/ mload(0x35c0), sub(PRIME, /*column12_row0*/ mload(0x3000)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 512) - 1. // val *= denominator_invs[13]. val := mulmod(val, mload(0x4880), PRIME) // res += val * (coefficients[170] + coefficients[171] * adjustments[12]). res := addmod(res, mulmod(val, add(/*coefficients[170]*/ mload(0x1980), mulmod(/*coefficients[171]*/ mload(0x19a0), /*adjustments[12]*/mload(0x4f80), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/input0_value3: column17_row391 - column16_row0. let val := addmod( /*column17_row391*/ mload(0x3620), sub(PRIME, /*column16_row0*/ mload(0x31a0)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 512) - 1. // val *= denominator_invs[13]. val := mulmod(val, mload(0x4880), PRIME) // res += val * (coefficients[172] + coefficients[173] * adjustments[12]). res := addmod(res, mulmod(val, add(/*coefficients[172]*/ mload(0x19c0), mulmod(/*coefficients[173]*/ mload(0x19e0), /*adjustments[12]*/mload(0x4f80), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/input0_addr: column17_row134 - (column17_row38 + 1). let val := addmod( /*column17_row134*/ mload(0x34e0), sub(PRIME, addmod(/*column17_row38*/ mload(0x33e0), 1, PRIME)), PRIME) // Numerator: point - trace_generator^(128 * (trace_length / 128 - 1)). // val *= numerators[6]. val := mulmod(val, mload(0x4d60), PRIME) // Denominator: point^(trace_length / 128) - 1. // val *= denominator_invs[14]. val := mulmod(val, mload(0x48a0), PRIME) // res += val * (coefficients[174] + coefficients[175] * adjustments[13]). res := addmod(res, mulmod(val, add(/*coefficients[174]*/ mload(0x1a00), mulmod(/*coefficients[175]*/ mload(0x1a20), /*adjustments[13]*/mload(0x4fa0), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/init_addr: column17_row6 - initial_pedersen_addr. let val := addmod( /*column17_row6*/ mload(0x32c0), sub(PRIME, /*initial_pedersen_addr*/ mload(0x280)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point - 1. // val *= denominator_invs[3]. val := mulmod(val, mload(0x4740), PRIME) // res += val * (coefficients[176] + coefficients[177] * adjustments[4]). res := addmod(res, mulmod(val, add(/*coefficients[176]*/ mload(0x1a40), mulmod(/*coefficients[177]*/ mload(0x1a60), /*adjustments[4]*/mload(0x4e80), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/input1_value0: column17_row71 - column4_row256. let val := addmod( /*column17_row71*/ mload(0x3440), sub(PRIME, /*column4_row256*/ mload(0x2d00)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 512) - 1. // val *= denominator_invs[13]. val := mulmod(val, mload(0x4880), PRIME) // res += val * (coefficients[178] + coefficients[179] * adjustments[12]). res := addmod(res, mulmod(val, add(/*coefficients[178]*/ mload(0x1a80), mulmod(/*coefficients[179]*/ mload(0x1aa0), /*adjustments[12]*/mload(0x4f80), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/input1_value1: column17_row199 - column8_row256. let val := addmod( /*column17_row199*/ mload(0x3580), sub(PRIME, /*column8_row256*/ mload(0x2ea0)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 512) - 1. // val *= denominator_invs[13]. val := mulmod(val, mload(0x4880), PRIME) // res += val * (coefficients[180] + coefficients[181] * adjustments[12]). res := addmod(res, mulmod(val, add(/*coefficients[180]*/ mload(0x1ac0), mulmod(/*coefficients[181]*/ mload(0x1ae0), /*adjustments[12]*/mload(0x4f80), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/input1_value2: column17_row327 - column12_row256. let val := addmod( /*column17_row327*/ mload(0x3600), sub(PRIME, /*column12_row256*/ mload(0x3040)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 512) - 1. // val *= denominator_invs[13]. val := mulmod(val, mload(0x4880), PRIME) // res += val * (coefficients[182] + coefficients[183] * adjustments[12]). res := addmod(res, mulmod(val, add(/*coefficients[182]*/ mload(0x1b00), mulmod(/*coefficients[183]*/ mload(0x1b20), /*adjustments[12]*/mload(0x4f80), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/input1_value3: column17_row455 - column16_row256. let val := addmod( /*column17_row455*/ mload(0x3680), sub(PRIME, /*column16_row256*/ mload(0x31e0)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 512) - 1. // val *= denominator_invs[13]. val := mulmod(val, mload(0x4880), PRIME) // res += val * (coefficients[184] + coefficients[185] * adjustments[12]). res := addmod(res, mulmod(val, add(/*coefficients[184]*/ mload(0x1b40), mulmod(/*coefficients[185]*/ mload(0x1b60), /*adjustments[12]*/mload(0x4f80), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/input1_addr: column17_row70 - (column17_row6 + 1). let val := addmod( /*column17_row70*/ mload(0x3420), sub(PRIME, addmod(/*column17_row6*/ mload(0x32c0), 1, PRIME)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 128) - 1. // val *= denominator_invs[14]. val := mulmod(val, mload(0x48a0), PRIME) // res += val * (coefficients[186] + coefficients[187] * adjustments[14]). res := addmod(res, mulmod(val, add(/*coefficients[186]*/ mload(0x1b80), mulmod(/*coefficients[187]*/ mload(0x1ba0), /*adjustments[14]*/mload(0x4fc0), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/output_value0: column17_row39 - column1_row511. let val := addmod( /*column17_row39*/ mload(0x3400), sub(PRIME, /*column1_row511*/ mload(0x2c00)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 512) - 1. // val *= denominator_invs[13]. val := mulmod(val, mload(0x4880), PRIME) // res += val * (coefficients[188] + coefficients[189] * adjustments[12]). res := addmod(res, mulmod(val, add(/*coefficients[188]*/ mload(0x1bc0), mulmod(/*coefficients[189]*/ mload(0x1be0), /*adjustments[12]*/mload(0x4f80), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/output_value1: column17_row167 - column5_row511. let val := addmod( /*column17_row167*/ mload(0x3560), sub(PRIME, /*column5_row511*/ mload(0x2da0)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 512) - 1. // val *= denominator_invs[13]. val := mulmod(val, mload(0x4880), PRIME) // res += val * (coefficients[190] + coefficients[191] * adjustments[12]). res := addmod(res, mulmod(val, add(/*coefficients[190]*/ mload(0x1c00), mulmod(/*coefficients[191]*/ mload(0x1c20), /*adjustments[12]*/mload(0x4f80), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/output_value2: column17_row295 - column9_row511. let val := addmod( /*column17_row295*/ mload(0x35e0), sub(PRIME, /*column9_row511*/ mload(0x2f40)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 512) - 1. // val *= denominator_invs[13]. val := mulmod(val, mload(0x4880), PRIME) // res += val * (coefficients[192] + coefficients[193] * adjustments[12]). res := addmod(res, mulmod(val, add(/*coefficients[192]*/ mload(0x1c40), mulmod(/*coefficients[193]*/ mload(0x1c60), /*adjustments[12]*/mload(0x4f80), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/output_value3: column17_row423 - column13_row511. let val := addmod( /*column17_row423*/ mload(0x3660), sub(PRIME, /*column13_row511*/ mload(0x30e0)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 512) - 1. // val *= denominator_invs[13]. val := mulmod(val, mload(0x4880), PRIME) // res += val * (coefficients[194] + coefficients[195] * adjustments[12]). res := addmod(res, mulmod(val, add(/*coefficients[194]*/ mload(0x1c80), mulmod(/*coefficients[195]*/ mload(0x1ca0), /*adjustments[12]*/mload(0x4f80), PRIME)), PRIME), PRIME) } { // Constraint expression for pedersen/output_addr: column17_row38 - (column17_row70 + 1). let val := addmod( /*column17_row38*/ mload(0x33e0), sub(PRIME, addmod(/*column17_row70*/ mload(0x3420), 1, PRIME)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 128) - 1. // val *= denominator_invs[14]. val := mulmod(val, mload(0x48a0), PRIME) // res += val * (coefficients[196] + coefficients[197] * adjustments[14]). res := addmod(res, mulmod(val, add(/*coefficients[196]*/ mload(0x1cc0), mulmod(/*coefficients[197]*/ mload(0x1ce0), /*adjustments[14]*/mload(0x4fc0), PRIME)), PRIME), PRIME) } { // Constraint expression for rc_builtin/value: rc_builtin__value7_0 - column17_row103. let val := addmod( /*intermediate_value/rc_builtin/value7_0*/ mload(0x4360), sub(PRIME, /*column17_row103*/ mload(0x34c0)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 128) - 1. // val *= denominator_invs[14]. val := mulmod(val, mload(0x48a0), PRIME) // res += val * (coefficients[198] + coefficients[199] * adjustments[14]). res := addmod(res, mulmod(val, add(/*coefficients[198]*/ mload(0x1d00), mulmod(/*coefficients[199]*/ mload(0x1d20), /*adjustments[14]*/mload(0x4fc0), PRIME)), PRIME), PRIME) } { // Constraint expression for rc_builtin/addr_step: column17_row230 - (column17_row102 + 1). let val := addmod( /*column17_row230*/ mload(0x35a0), sub(PRIME, addmod(/*column17_row102*/ mload(0x34a0), 1, PRIME)), PRIME) // Numerator: point - trace_generator^(128 * (trace_length / 128 - 1)). // val *= numerators[6]. val := mulmod(val, mload(0x4d60), PRIME) // Denominator: point^(trace_length / 128) - 1. // val *= denominator_invs[14]. val := mulmod(val, mload(0x48a0), PRIME) // res += val * (coefficients[200] + coefficients[201] * adjustments[13]). res := addmod(res, mulmod(val, add(/*coefficients[200]*/ mload(0x1d40), mulmod(/*coefficients[201]*/ mload(0x1d60), /*adjustments[13]*/mload(0x4fa0), PRIME)), PRIME), PRIME) } { // Constraint expression for rc_builtin/init_addr: column17_row102 - initial_rc_addr. let val := addmod( /*column17_row102*/ mload(0x34a0), sub(PRIME, /*initial_rc_addr*/ mload(0x2a0)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point - 1. // val *= denominator_invs[3]. val := mulmod(val, mload(0x4740), PRIME) // res += val * (coefficients[202] + coefficients[203] * adjustments[4]). res := addmod(res, mulmod(val, add(/*coefficients[202]*/ mload(0x1d80), mulmod(/*coefficients[203]*/ mload(0x1da0), /*adjustments[4]*/mload(0x4e80), PRIME)), PRIME), PRIME) } { // Constraint expression for ecdsa/signature0/doubling_key/slope: ecdsa__signature0__doubling_key__x_squared + ecdsa__signature0__doubling_key__x_squared + ecdsa__signature0__doubling_key__x_squared + ecdsa/sig_config.alpha - (column19_row15 + column19_row15) * column20_row0. let val := addmod( addmod( addmod( addmod( /*intermediate_value/ecdsa/signature0/doubling_key/x_squared*/ mload(0x4380), /*intermediate_value/ecdsa/signature0/doubling_key/x_squared*/ mload(0x4380), PRIME), /*intermediate_value/ecdsa/signature0/doubling_key/x_squared*/ mload(0x4380), PRIME), /*ecdsa/sig_config.alpha*/ mload(0x2c0), PRIME), sub( PRIME, mulmod( addmod(/*column19_row15*/ mload(0x3920), /*column19_row15*/ mload(0x3920), PRIME), /*column20_row0*/ mload(0x3ae0), PRIME)), PRIME) // Numerator: point^(trace_length / 4096) - trace_generator^(255 * trace_length / 256). // val *= numerators[7]. val := mulmod(val, mload(0x4d80), PRIME) // Denominator: point^(trace_length / 16) - 1. // val *= denominator_invs[2]. val := mulmod(val, mload(0x4720), PRIME) // res += val * (coefficients[204] + coefficients[205] * adjustments[15]). res := addmod(res, mulmod(val, add(/*coefficients[204]*/ mload(0x1dc0), mulmod(/*coefficients[205]*/ mload(0x1de0), /*adjustments[15]*/mload(0x4fe0), PRIME)), PRIME), PRIME) } { // Constraint expression for ecdsa/signature0/doubling_key/x: column20_row0 * column20_row0 - (column19_row7 + column19_row7 + column19_row23). let val := addmod( mulmod(/*column20_row0*/ mload(0x3ae0), /*column20_row0*/ mload(0x3ae0), PRIME), sub( PRIME, addmod( addmod(/*column19_row7*/ mload(0x3860), /*column19_row7*/ mload(0x3860), PRIME), /*column19_row23*/ mload(0x3960), PRIME)), PRIME) // Numerator: point^(trace_length / 4096) - trace_generator^(255 * trace_length / 256). // val *= numerators[7]. val := mulmod(val, mload(0x4d80), PRIME) // Denominator: point^(trace_length / 16) - 1. // val *= denominator_invs[2]. val := mulmod(val, mload(0x4720), PRIME) // res += val * (coefficients[206] + coefficients[207] * adjustments[15]). res := addmod(res, mulmod(val, add(/*coefficients[206]*/ mload(0x1e00), mulmod(/*coefficients[207]*/ mload(0x1e20), /*adjustments[15]*/mload(0x4fe0), PRIME)), PRIME), PRIME) } { // Constraint expression for ecdsa/signature0/doubling_key/y: column19_row15 + column19_row31 - column20_row0 * (column19_row7 - column19_row23). let val := addmod( addmod(/*column19_row15*/ mload(0x3920), /*column19_row31*/ mload(0x39c0), PRIME), sub( PRIME, mulmod( /*column20_row0*/ mload(0x3ae0), addmod( /*column19_row7*/ mload(0x3860), sub(PRIME, /*column19_row23*/ mload(0x3960)), PRIME), PRIME)), PRIME) // Numerator: point^(trace_length / 4096) - trace_generator^(255 * trace_length / 256). // val *= numerators[7]. val := mulmod(val, mload(0x4d80), PRIME) // Denominator: point^(trace_length / 16) - 1. // val *= denominator_invs[2]. val := mulmod(val, mload(0x4720), PRIME) // res += val * (coefficients[208] + coefficients[209] * adjustments[15]). res := addmod(res, mulmod(val, add(/*coefficients[208]*/ mload(0x1e40), mulmod(/*coefficients[209]*/ mload(0x1e60), /*adjustments[15]*/mload(0x4fe0), PRIME)), PRIME), PRIME) } { // Constraint expression for ecdsa/signature0/exponentiate_generator/booleanity_test: ecdsa__signature0__exponentiate_generator__bit_0 * (ecdsa__signature0__exponentiate_generator__bit_0 - 1). let val := mulmod( /*intermediate_value/ecdsa/signature0/exponentiate_generator/bit_0*/ mload(0x43a0), addmod( /*intermediate_value/ecdsa/signature0/exponentiate_generator/bit_0*/ mload(0x43a0), sub(PRIME, 1), PRIME), PRIME) // Numerator: point^(trace_length / 8192) - trace_generator^(255 * trace_length / 256). // val *= numerators[8]. val := mulmod(val, mload(0x4da0), PRIME) // Denominator: point^(trace_length / 32) - 1. // val *= denominator_invs[15]. val := mulmod(val, mload(0x48c0), PRIME) // res += val * (coefficients[210] + coefficients[211] * adjustments[16]). res := addmod(res, mulmod(val, add(/*coefficients[210]*/ mload(0x1e80), mulmod(/*coefficients[211]*/ mload(0x1ea0), /*adjustments[16]*/mload(0x5000), PRIME)), PRIME), PRIME) } { // Constraint expression for ecdsa/signature0/exponentiate_generator/bit_extraction_end: column20_row30. let val := /*column20_row30*/ mload(0x3c80) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 8192) - trace_generator^(251 * trace_length / 256). // val *= denominator_invs[16]. val := mulmod(val, mload(0x48e0), PRIME) // res += val * (coefficients[212] + coefficients[213] * adjustments[17]). res := addmod(res, mulmod(val, add(/*coefficients[212]*/ mload(0x1ec0), mulmod(/*coefficients[213]*/ mload(0x1ee0), /*adjustments[17]*/mload(0x5020), PRIME)), PRIME), PRIME) } { // Constraint expression for ecdsa/signature0/exponentiate_generator/zeros_tail: column20_row30. let val := /*column20_row30*/ mload(0x3c80) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 8192) - trace_generator^(255 * trace_length / 256). // val *= denominator_invs[17]. val := mulmod(val, mload(0x4900), PRIME) // res += val * (coefficients[214] + coefficients[215] * adjustments[17]). res := addmod(res, mulmod(val, add(/*coefficients[214]*/ mload(0x1f00), mulmod(/*coefficients[215]*/ mload(0x1f20), /*adjustments[17]*/mload(0x5020), PRIME)), PRIME), PRIME) } { // Constraint expression for ecdsa/signature0/exponentiate_generator/add_points/slope: ecdsa__signature0__exponentiate_generator__bit_0 * (column20_row22 - ecdsa__generator_points__y) - column20_row14 * (column20_row6 - ecdsa__generator_points__x). let val := addmod( mulmod( /*intermediate_value/ecdsa/signature0/exponentiate_generator/bit_0*/ mload(0x43a0), addmod( /*column20_row22*/ mload(0x3c40), sub(PRIME, /*periodic_column/ecdsa/generator_points/y*/ mload(0x60)), PRIME), PRIME), sub( PRIME, mulmod( /*column20_row14*/ mload(0x3be0), addmod( /*column20_row6*/ mload(0x3b60), sub(PRIME, /*periodic_column/ecdsa/generator_points/x*/ mload(0x40)), PRIME), PRIME)), PRIME) // Numerator: point^(trace_length / 8192) - trace_generator^(255 * trace_length / 256). // val *= numerators[8]. val := mulmod(val, mload(0x4da0), PRIME) // Denominator: point^(trace_length / 32) - 1. // val *= denominator_invs[15]. val := mulmod(val, mload(0x48c0), PRIME) // res += val * (coefficients[216] + coefficients[217] * adjustments[16]). res := addmod(res, mulmod(val, add(/*coefficients[216]*/ mload(0x1f40), mulmod(/*coefficients[217]*/ mload(0x1f60), /*adjustments[16]*/mload(0x5000), PRIME)), PRIME), PRIME) } { // Constraint expression for ecdsa/signature0/exponentiate_generator/add_points/x: column20_row14 * column20_row14 - ecdsa__signature0__exponentiate_generator__bit_0 * (column20_row6 + ecdsa__generator_points__x + column20_row38). let val := addmod( mulmod(/*column20_row14*/ mload(0x3be0), /*column20_row14*/ mload(0x3be0), PRIME), sub( PRIME, mulmod( /*intermediate_value/ecdsa/signature0/exponentiate_generator/bit_0*/ mload(0x43a0), addmod( addmod( /*column20_row6*/ mload(0x3b60), /*periodic_column/ecdsa/generator_points/x*/ mload(0x40), PRIME), /*column20_row38*/ mload(0x3ca0), PRIME), PRIME)), PRIME) // Numerator: point^(trace_length / 8192) - trace_generator^(255 * trace_length / 256). // val *= numerators[8]. val := mulmod(val, mload(0x4da0), PRIME) // Denominator: point^(trace_length / 32) - 1. // val *= denominator_invs[15]. val := mulmod(val, mload(0x48c0), PRIME) // res += val * (coefficients[218] + coefficients[219] * adjustments[16]). res := addmod(res, mulmod(val, add(/*coefficients[218]*/ mload(0x1f80), mulmod(/*coefficients[219]*/ mload(0x1fa0), /*adjustments[16]*/mload(0x5000), PRIME)), PRIME), PRIME) } { // Constraint expression for ecdsa/signature0/exponentiate_generator/add_points/y: ecdsa__signature0__exponentiate_generator__bit_0 * (column20_row22 + column20_row54) - column20_row14 * (column20_row6 - column20_row38). let val := addmod( mulmod( /*intermediate_value/ecdsa/signature0/exponentiate_generator/bit_0*/ mload(0x43a0), addmod(/*column20_row22*/ mload(0x3c40), /*column20_row54*/ mload(0x3cc0), PRIME), PRIME), sub( PRIME, mulmod( /*column20_row14*/ mload(0x3be0), addmod( /*column20_row6*/ mload(0x3b60), sub(PRIME, /*column20_row38*/ mload(0x3ca0)), PRIME), PRIME)), PRIME) // Numerator: point^(trace_length / 8192) - trace_generator^(255 * trace_length / 256). // val *= numerators[8]. val := mulmod(val, mload(0x4da0), PRIME) // Denominator: point^(trace_length / 32) - 1. // val *= denominator_invs[15]. val := mulmod(val, mload(0x48c0), PRIME) // res += val * (coefficients[220] + coefficients[221] * adjustments[16]). res := addmod(res, mulmod(val, add(/*coefficients[220]*/ mload(0x1fc0), mulmod(/*coefficients[221]*/ mload(0x1fe0), /*adjustments[16]*/mload(0x5000), PRIME)), PRIME), PRIME) } { // Constraint expression for ecdsa/signature0/exponentiate_generator/add_points/x_diff_inv: column20_row1 * (column20_row6 - ecdsa__generator_points__x) - 1. let val := addmod( mulmod( /*column20_row1*/ mload(0x3b00), addmod( /*column20_row6*/ mload(0x3b60), sub(PRIME, /*periodic_column/ecdsa/generator_points/x*/ mload(0x40)), PRIME), PRIME), sub(PRIME, 1), PRIME) // Numerator: point^(trace_length / 8192) - trace_generator^(255 * trace_length / 256). // val *= numerators[8]. val := mulmod(val, mload(0x4da0), PRIME) // Denominator: point^(trace_length / 32) - 1. // val *= denominator_invs[15]. val := mulmod(val, mload(0x48c0), PRIME) // res += val * (coefficients[222] + coefficients[223] * adjustments[16]). res := addmod(res, mulmod(val, add(/*coefficients[222]*/ mload(0x2000), mulmod(/*coefficients[223]*/ mload(0x2020), /*adjustments[16]*/mload(0x5000), PRIME)), PRIME), PRIME) } { // Constraint expression for ecdsa/signature0/exponentiate_generator/copy_point/x: ecdsa__signature0__exponentiate_generator__bit_neg_0 * (column20_row38 - column20_row6). let val := mulmod( /*intermediate_value/ecdsa/signature0/exponentiate_generator/bit_neg_0*/ mload(0x43c0), addmod( /*column20_row38*/ mload(0x3ca0), sub(PRIME, /*column20_row6*/ mload(0x3b60)), PRIME), PRIME) // Numerator: point^(trace_length / 8192) - trace_generator^(255 * trace_length / 256). // val *= numerators[8]. val := mulmod(val, mload(0x4da0), PRIME) // Denominator: point^(trace_length / 32) - 1. // val *= denominator_invs[15]. val := mulmod(val, mload(0x48c0), PRIME) // res += val * (coefficients[224] + coefficients[225] * adjustments[16]). res := addmod(res, mulmod(val, add(/*coefficients[224]*/ mload(0x2040), mulmod(/*coefficients[225]*/ mload(0x2060), /*adjustments[16]*/mload(0x5000), PRIME)), PRIME), PRIME) } { // Constraint expression for ecdsa/signature0/exponentiate_generator/copy_point/y: ecdsa__signature0__exponentiate_generator__bit_neg_0 * (column20_row54 - column20_row22). let val := mulmod( /*intermediate_value/ecdsa/signature0/exponentiate_generator/bit_neg_0*/ mload(0x43c0), addmod( /*column20_row54*/ mload(0x3cc0), sub(PRIME, /*column20_row22*/ mload(0x3c40)), PRIME), PRIME) // Numerator: point^(trace_length / 8192) - trace_generator^(255 * trace_length / 256). // val *= numerators[8]. val := mulmod(val, mload(0x4da0), PRIME) // Denominator: point^(trace_length / 32) - 1. // val *= denominator_invs[15]. val := mulmod(val, mload(0x48c0), PRIME) // res += val * (coefficients[226] + coefficients[227] * adjustments[16]). res := addmod(res, mulmod(val, add(/*coefficients[226]*/ mload(0x2080), mulmod(/*coefficients[227]*/ mload(0x20a0), /*adjustments[16]*/mload(0x5000), PRIME)), PRIME), PRIME) } { // Constraint expression for ecdsa/signature0/exponentiate_key/booleanity_test: ecdsa__signature0__exponentiate_key__bit_0 * (ecdsa__signature0__exponentiate_key__bit_0 - 1). let val := mulmod( /*intermediate_value/ecdsa/signature0/exponentiate_key/bit_0*/ mload(0x43e0), addmod( /*intermediate_value/ecdsa/signature0/exponentiate_key/bit_0*/ mload(0x43e0), sub(PRIME, 1), PRIME), PRIME) // Numerator: point^(trace_length / 4096) - trace_generator^(255 * trace_length / 256). // val *= numerators[7]. val := mulmod(val, mload(0x4d80), PRIME) // Denominator: point^(trace_length / 16) - 1. // val *= denominator_invs[2]. val := mulmod(val, mload(0x4720), PRIME) // res += val * (coefficients[228] + coefficients[229] * adjustments[15]). res := addmod(res, mulmod(val, add(/*coefficients[228]*/ mload(0x20c0), mulmod(/*coefficients[229]*/ mload(0x20e0), /*adjustments[15]*/mload(0x4fe0), PRIME)), PRIME), PRIME) } { // Constraint expression for ecdsa/signature0/exponentiate_key/bit_extraction_end: column20_row2. let val := /*column20_row2*/ mload(0x3b20) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 4096) - trace_generator^(251 * trace_length / 256). // val *= denominator_invs[18]. val := mulmod(val, mload(0x4920), PRIME) // res += val * (coefficients[230] + coefficients[231] * adjustments[18]). res := addmod(res, mulmod(val, add(/*coefficients[230]*/ mload(0x2100), mulmod(/*coefficients[231]*/ mload(0x2120), /*adjustments[18]*/mload(0x5040), PRIME)), PRIME), PRIME) } { // Constraint expression for ecdsa/signature0/exponentiate_key/zeros_tail: column20_row2. let val := /*column20_row2*/ mload(0x3b20) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 4096) - trace_generator^(255 * trace_length / 256). // val *= denominator_invs[19]. val := mulmod(val, mload(0x4940), PRIME) // res += val * (coefficients[232] + coefficients[233] * adjustments[18]). res := addmod(res, mulmod(val, add(/*coefficients[232]*/ mload(0x2140), mulmod(/*coefficients[233]*/ mload(0x2160), /*adjustments[18]*/mload(0x5040), PRIME)), PRIME), PRIME) } { // Constraint expression for ecdsa/signature0/exponentiate_key/add_points/slope: ecdsa__signature0__exponentiate_key__bit_0 * (column20_row4 - column19_row15) - column20_row12 * (column20_row8 - column19_row7). let val := addmod( mulmod( /*intermediate_value/ecdsa/signature0/exponentiate_key/bit_0*/ mload(0x43e0), addmod( /*column20_row4*/ mload(0x3b40), sub(PRIME, /*column19_row15*/ mload(0x3920)), PRIME), PRIME), sub( PRIME, mulmod( /*column20_row12*/ mload(0x3bc0), addmod(/*column20_row8*/ mload(0x3b80), sub(PRIME, /*column19_row7*/ mload(0x3860)), PRIME), PRIME)), PRIME) // Numerator: point^(trace_length / 4096) - trace_generator^(255 * trace_length / 256). // val *= numerators[7]. val := mulmod(val, mload(0x4d80), PRIME) // Denominator: point^(trace_length / 16) - 1. // val *= denominator_invs[2]. val := mulmod(val, mload(0x4720), PRIME) // res += val * (coefficients[234] + coefficients[235] * adjustments[15]). res := addmod(res, mulmod(val, add(/*coefficients[234]*/ mload(0x2180), mulmod(/*coefficients[235]*/ mload(0x21a0), /*adjustments[15]*/mload(0x4fe0), PRIME)), PRIME), PRIME) } { // Constraint expression for ecdsa/signature0/exponentiate_key/add_points/x: column20_row12 * column20_row12 - ecdsa__signature0__exponentiate_key__bit_0 * (column20_row8 + column19_row7 + column20_row24). let val := addmod( mulmod(/*column20_row12*/ mload(0x3bc0), /*column20_row12*/ mload(0x3bc0), PRIME), sub( PRIME, mulmod( /*intermediate_value/ecdsa/signature0/exponentiate_key/bit_0*/ mload(0x43e0), addmod( addmod(/*column20_row8*/ mload(0x3b80), /*column19_row7*/ mload(0x3860), PRIME), /*column20_row24*/ mload(0x3c60), PRIME), PRIME)), PRIME) // Numerator: point^(trace_length / 4096) - trace_generator^(255 * trace_length / 256). // val *= numerators[7]. val := mulmod(val, mload(0x4d80), PRIME) // Denominator: point^(trace_length / 16) - 1. // val *= denominator_invs[2]. val := mulmod(val, mload(0x4720), PRIME) // res += val * (coefficients[236] + coefficients[237] * adjustments[15]). res := addmod(res, mulmod(val, add(/*coefficients[236]*/ mload(0x21c0), mulmod(/*coefficients[237]*/ mload(0x21e0), /*adjustments[15]*/mload(0x4fe0), PRIME)), PRIME), PRIME) } { // Constraint expression for ecdsa/signature0/exponentiate_key/add_points/y: ecdsa__signature0__exponentiate_key__bit_0 * (column20_row4 + column20_row20) - column20_row12 * (column20_row8 - column20_row24). let val := addmod( mulmod( /*intermediate_value/ecdsa/signature0/exponentiate_key/bit_0*/ mload(0x43e0), addmod(/*column20_row4*/ mload(0x3b40), /*column20_row20*/ mload(0x3c20), PRIME), PRIME), sub( PRIME, mulmod( /*column20_row12*/ mload(0x3bc0), addmod( /*column20_row8*/ mload(0x3b80), sub(PRIME, /*column20_row24*/ mload(0x3c60)), PRIME), PRIME)), PRIME) // Numerator: point^(trace_length / 4096) - trace_generator^(255 * trace_length / 256). // val *= numerators[7]. val := mulmod(val, mload(0x4d80), PRIME) // Denominator: point^(trace_length / 16) - 1. // val *= denominator_invs[2]. val := mulmod(val, mload(0x4720), PRIME) // res += val * (coefficients[238] + coefficients[239] * adjustments[15]). res := addmod(res, mulmod(val, add(/*coefficients[238]*/ mload(0x2200), mulmod(/*coefficients[239]*/ mload(0x2220), /*adjustments[15]*/mload(0x4fe0), PRIME)), PRIME), PRIME) } { // Constraint expression for ecdsa/signature0/exponentiate_key/add_points/x_diff_inv: column20_row10 * (column20_row8 - column19_row7) - 1. let val := addmod( mulmod( /*column20_row10*/ mload(0x3ba0), addmod(/*column20_row8*/ mload(0x3b80), sub(PRIME, /*column19_row7*/ mload(0x3860)), PRIME), PRIME), sub(PRIME, 1), PRIME) // Numerator: point^(trace_length / 4096) - trace_generator^(255 * trace_length / 256). // val *= numerators[7]. val := mulmod(val, mload(0x4d80), PRIME) // Denominator: point^(trace_length / 16) - 1. // val *= denominator_invs[2]. val := mulmod(val, mload(0x4720), PRIME) // res += val * (coefficients[240] + coefficients[241] * adjustments[15]). res := addmod(res, mulmod(val, add(/*coefficients[240]*/ mload(0x2240), mulmod(/*coefficients[241]*/ mload(0x2260), /*adjustments[15]*/mload(0x4fe0), PRIME)), PRIME), PRIME) } { // Constraint expression for ecdsa/signature0/exponentiate_key/copy_point/x: ecdsa__signature0__exponentiate_key__bit_neg_0 * (column20_row24 - column20_row8). let val := mulmod( /*intermediate_value/ecdsa/signature0/exponentiate_key/bit_neg_0*/ mload(0x4400), addmod( /*column20_row24*/ mload(0x3c60), sub(PRIME, /*column20_row8*/ mload(0x3b80)), PRIME), PRIME) // Numerator: point^(trace_length / 4096) - trace_generator^(255 * trace_length / 256). // val *= numerators[7]. val := mulmod(val, mload(0x4d80), PRIME) // Denominator: point^(trace_length / 16) - 1. // val *= denominator_invs[2]. val := mulmod(val, mload(0x4720), PRIME) // res += val * (coefficients[242] + coefficients[243] * adjustments[15]). res := addmod(res, mulmod(val, add(/*coefficients[242]*/ mload(0x2280), mulmod(/*coefficients[243]*/ mload(0x22a0), /*adjustments[15]*/mload(0x4fe0), PRIME)), PRIME), PRIME) } { // Constraint expression for ecdsa/signature0/exponentiate_key/copy_point/y: ecdsa__signature0__exponentiate_key__bit_neg_0 * (column20_row20 - column20_row4). let val := mulmod( /*intermediate_value/ecdsa/signature0/exponentiate_key/bit_neg_0*/ mload(0x4400), addmod( /*column20_row20*/ mload(0x3c20), sub(PRIME, /*column20_row4*/ mload(0x3b40)), PRIME), PRIME) // Numerator: point^(trace_length / 4096) - trace_generator^(255 * trace_length / 256). // val *= numerators[7]. val := mulmod(val, mload(0x4d80), PRIME) // Denominator: point^(trace_length / 16) - 1. // val *= denominator_invs[2]. val := mulmod(val, mload(0x4720), PRIME) // res += val * (coefficients[244] + coefficients[245] * adjustments[15]). res := addmod(res, mulmod(val, add(/*coefficients[244]*/ mload(0x22c0), mulmod(/*coefficients[245]*/ mload(0x22e0), /*adjustments[15]*/mload(0x4fe0), PRIME)), PRIME), PRIME) } { // Constraint expression for ecdsa/signature0/init_gen/x: column20_row6 - ecdsa/sig_config.shift_point.x. let val := addmod( /*column20_row6*/ mload(0x3b60), sub(PRIME, /*ecdsa/sig_config.shift_point.x*/ mload(0x2e0)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 8192) - 1. // val *= denominator_invs[20]. val := mulmod(val, mload(0x4960), PRIME) // res += val * (coefficients[246] + coefficients[247] * adjustments[17]). res := addmod(res, mulmod(val, add(/*coefficients[246]*/ mload(0x2300), mulmod(/*coefficients[247]*/ mload(0x2320), /*adjustments[17]*/mload(0x5020), PRIME)), PRIME), PRIME) } { // Constraint expression for ecdsa/signature0/init_gen/y: column20_row22 + ecdsa/sig_config.shift_point.y. let val := addmod( /*column20_row22*/ mload(0x3c40), /*ecdsa/sig_config.shift_point.y*/ mload(0x300), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 8192) - 1. // val *= denominator_invs[20]. val := mulmod(val, mload(0x4960), PRIME) // res += val * (coefficients[248] + coefficients[249] * adjustments[17]). res := addmod(res, mulmod(val, add(/*coefficients[248]*/ mload(0x2340), mulmod(/*coefficients[249]*/ mload(0x2360), /*adjustments[17]*/mload(0x5020), PRIME)), PRIME), PRIME) } { // Constraint expression for ecdsa/signature0/init_key/x: column20_row8 - ecdsa/sig_config.shift_point.x. let val := addmod( /*column20_row8*/ mload(0x3b80), sub(PRIME, /*ecdsa/sig_config.shift_point.x*/ mload(0x2e0)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 4096) - 1. // val *= denominator_invs[21]. val := mulmod(val, mload(0x4980), PRIME) // res += val * (coefficients[250] + coefficients[251] * adjustments[18]). res := addmod(res, mulmod(val, add(/*coefficients[250]*/ mload(0x2380), mulmod(/*coefficients[251]*/ mload(0x23a0), /*adjustments[18]*/mload(0x5040), PRIME)), PRIME), PRIME) } { // Constraint expression for ecdsa/signature0/init_key/y: column20_row4 - ecdsa/sig_config.shift_point.y. let val := addmod( /*column20_row4*/ mload(0x3b40), sub(PRIME, /*ecdsa/sig_config.shift_point.y*/ mload(0x300)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 4096) - 1. // val *= denominator_invs[21]. val := mulmod(val, mload(0x4980), PRIME) // res += val * (coefficients[252] + coefficients[253] * adjustments[18]). res := addmod(res, mulmod(val, add(/*coefficients[252]*/ mload(0x23c0), mulmod(/*coefficients[253]*/ mload(0x23e0), /*adjustments[18]*/mload(0x5040), PRIME)), PRIME), PRIME) } { // Constraint expression for ecdsa/signature0/add_results/slope: column20_row8182 - (column20_row4084 + column20_row8161 * (column20_row8166 - column20_row4088)). let val := addmod( /*column20_row8182*/ mload(0x3e40), sub( PRIME, addmod( /*column20_row4084*/ mload(0x3d20), mulmod( /*column20_row8161*/ mload(0x3da0), addmod( /*column20_row8166*/ mload(0x3dc0), sub(PRIME, /*column20_row4088*/ mload(0x3d40)), PRIME), PRIME), PRIME)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 8192) - 1. // val *= denominator_invs[20]. val := mulmod(val, mload(0x4960), PRIME) // res += val * (coefficients[254] + coefficients[255] * adjustments[19]). res := addmod(res, mulmod(val, add(/*coefficients[254]*/ mload(0x2400), mulmod(/*coefficients[255]*/ mload(0x2420), /*adjustments[19]*/mload(0x5060), PRIME)), PRIME), PRIME) } { // Constraint expression for ecdsa/signature0/add_results/x: column20_row8161 * column20_row8161 - (column20_row8166 + column20_row4088 + column19_row4103). let val := addmod( mulmod(/*column20_row8161*/ mload(0x3da0), /*column20_row8161*/ mload(0x3da0), PRIME), sub( PRIME, addmod( addmod(/*column20_row8166*/ mload(0x3dc0), /*column20_row4088*/ mload(0x3d40), PRIME), /*column19_row4103*/ mload(0x3aa0), PRIME)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 8192) - 1. // val *= denominator_invs[20]. val := mulmod(val, mload(0x4960), PRIME) // res += val * (coefficients[256] + coefficients[257] * adjustments[19]). res := addmod(res, mulmod(val, add(/*coefficients[256]*/ mload(0x2440), mulmod(/*coefficients[257]*/ mload(0x2460), /*adjustments[19]*/mload(0x5060), PRIME)), PRIME), PRIME) } { // Constraint expression for ecdsa/signature0/add_results/y: column20_row8182 + column19_row4111 - column20_row8161 * (column20_row8166 - column19_row4103). let val := addmod( addmod(/*column20_row8182*/ mload(0x3e40), /*column19_row4111*/ mload(0x3ac0), PRIME), sub( PRIME, mulmod( /*column20_row8161*/ mload(0x3da0), addmod( /*column20_row8166*/ mload(0x3dc0), sub(PRIME, /*column19_row4103*/ mload(0x3aa0)), PRIME), PRIME)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 8192) - 1. // val *= denominator_invs[20]. val := mulmod(val, mload(0x4960), PRIME) // res += val * (coefficients[258] + coefficients[259] * adjustments[19]). res := addmod(res, mulmod(val, add(/*coefficients[258]*/ mload(0x2480), mulmod(/*coefficients[259]*/ mload(0x24a0), /*adjustments[19]*/mload(0x5060), PRIME)), PRIME), PRIME) } { // Constraint expression for ecdsa/signature0/add_results/x_diff_inv: column20_row8174 * (column20_row8166 - column20_row4088) - 1. let val := addmod( mulmod( /*column20_row8174*/ mload(0x3de0), addmod( /*column20_row8166*/ mload(0x3dc0), sub(PRIME, /*column20_row4088*/ mload(0x3d40)), PRIME), PRIME), sub(PRIME, 1), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 8192) - 1. // val *= denominator_invs[20]. val := mulmod(val, mload(0x4960), PRIME) // res += val * (coefficients[260] + coefficients[261] * adjustments[19]). res := addmod(res, mulmod(val, add(/*coefficients[260]*/ mload(0x24c0), mulmod(/*coefficients[261]*/ mload(0x24e0), /*adjustments[19]*/mload(0x5060), PRIME)), PRIME), PRIME) } { // Constraint expression for ecdsa/signature0/extract_r/slope: column20_row8180 + ecdsa/sig_config.shift_point.y - column20_row4092 * (column20_row8184 - ecdsa/sig_config.shift_point.x). let val := addmod( addmod( /*column20_row8180*/ mload(0x3e20), /*ecdsa/sig_config.shift_point.y*/ mload(0x300), PRIME), sub( PRIME, mulmod( /*column20_row4092*/ mload(0x3d80), addmod( /*column20_row8184*/ mload(0x3e60), sub(PRIME, /*ecdsa/sig_config.shift_point.x*/ mload(0x2e0)), PRIME), PRIME)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 8192) - 1. // val *= denominator_invs[20]. val := mulmod(val, mload(0x4960), PRIME) // res += val * (coefficients[262] + coefficients[263] * adjustments[19]). res := addmod(res, mulmod(val, add(/*coefficients[262]*/ mload(0x2500), mulmod(/*coefficients[263]*/ mload(0x2520), /*adjustments[19]*/mload(0x5060), PRIME)), PRIME), PRIME) } { // Constraint expression for ecdsa/signature0/extract_r/x: column20_row4092 * column20_row4092 - (column20_row8184 + ecdsa/sig_config.shift_point.x + column20_row2). let val := addmod( mulmod(/*column20_row4092*/ mload(0x3d80), /*column20_row4092*/ mload(0x3d80), PRIME), sub( PRIME, addmod( addmod( /*column20_row8184*/ mload(0x3e60), /*ecdsa/sig_config.shift_point.x*/ mload(0x2e0), PRIME), /*column20_row2*/ mload(0x3b20), PRIME)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 8192) - 1. // val *= denominator_invs[20]. val := mulmod(val, mload(0x4960), PRIME) // res += val * (coefficients[264] + coefficients[265] * adjustments[19]). res := addmod(res, mulmod(val, add(/*coefficients[264]*/ mload(0x2540), mulmod(/*coefficients[265]*/ mload(0x2560), /*adjustments[19]*/mload(0x5060), PRIME)), PRIME), PRIME) } { // Constraint expression for ecdsa/signature0/extract_r/x_diff_inv: column20_row8188 * (column20_row8184 - ecdsa/sig_config.shift_point.x) - 1. let val := addmod( mulmod( /*column20_row8188*/ mload(0x3e80), addmod( /*column20_row8184*/ mload(0x3e60), sub(PRIME, /*ecdsa/sig_config.shift_point.x*/ mload(0x2e0)), PRIME), PRIME), sub(PRIME, 1), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 8192) - 1. // val *= denominator_invs[20]. val := mulmod(val, mload(0x4960), PRIME) // res += val * (coefficients[266] + coefficients[267] * adjustments[19]). res := addmod(res, mulmod(val, add(/*coefficients[266]*/ mload(0x2580), mulmod(/*coefficients[267]*/ mload(0x25a0), /*adjustments[19]*/mload(0x5060), PRIME)), PRIME), PRIME) } { // Constraint expression for ecdsa/signature0/z_nonzero: column20_row30 * column20_row4080 - 1. let val := addmod( mulmod(/*column20_row30*/ mload(0x3c80), /*column20_row4080*/ mload(0x3d00), PRIME), sub(PRIME, 1), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 8192) - 1. // val *= denominator_invs[20]. val := mulmod(val, mload(0x4960), PRIME) // res += val * (coefficients[268] + coefficients[269] * adjustments[19]). res := addmod(res, mulmod(val, add(/*coefficients[268]*/ mload(0x25c0), mulmod(/*coefficients[269]*/ mload(0x25e0), /*adjustments[19]*/mload(0x5060), PRIME)), PRIME), PRIME) } { // Constraint expression for ecdsa/signature0/r_and_w_nonzero: column20_row2 * column20_row4090 - 1. let val := addmod( mulmod(/*column20_row2*/ mload(0x3b20), /*column20_row4090*/ mload(0x3d60), PRIME), sub(PRIME, 1), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 4096) - 1. // val *= denominator_invs[21]. val := mulmod(val, mload(0x4980), PRIME) // res += val * (coefficients[270] + coefficients[271] * adjustments[20]). res := addmod(res, mulmod(val, add(/*coefficients[270]*/ mload(0x2600), mulmod(/*coefficients[271]*/ mload(0x2620), /*adjustments[20]*/mload(0x5080), PRIME)), PRIME), PRIME) } { // Constraint expression for ecdsa/signature0/q_on_curve/x_squared: column20_row8176 - column19_row7 * column19_row7. let val := addmod( /*column20_row8176*/ mload(0x3e00), sub( PRIME, mulmod(/*column19_row7*/ mload(0x3860), /*column19_row7*/ mload(0x3860), PRIME)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 8192) - 1. // val *= denominator_invs[20]. val := mulmod(val, mload(0x4960), PRIME) // res += val * (coefficients[272] + coefficients[273] * adjustments[19]). res := addmod(res, mulmod(val, add(/*coefficients[272]*/ mload(0x2640), mulmod(/*coefficients[273]*/ mload(0x2660), /*adjustments[19]*/mload(0x5060), PRIME)), PRIME), PRIME) } { // Constraint expression for ecdsa/signature0/q_on_curve/on_curve: column19_row15 * column19_row15 - (column19_row7 * column20_row8176 + ecdsa/sig_config.alpha * column19_row7 + ecdsa/sig_config.beta). let val := addmod( mulmod(/*column19_row15*/ mload(0x3920), /*column19_row15*/ mload(0x3920), PRIME), sub( PRIME, addmod( addmod( mulmod(/*column19_row7*/ mload(0x3860), /*column20_row8176*/ mload(0x3e00), PRIME), mulmod(/*ecdsa/sig_config.alpha*/ mload(0x2c0), /*column19_row7*/ mload(0x3860), PRIME), PRIME), /*ecdsa/sig_config.beta*/ mload(0x320), PRIME)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 8192) - 1. // val *= denominator_invs[20]. val := mulmod(val, mload(0x4960), PRIME) // res += val * (coefficients[274] + coefficients[275] * adjustments[19]). res := addmod(res, mulmod(val, add(/*coefficients[274]*/ mload(0x2680), mulmod(/*coefficients[275]*/ mload(0x26a0), /*adjustments[19]*/mload(0x5060), PRIME)), PRIME), PRIME) } { // Constraint expression for ecdsa/init_addr: column17_row22 - initial_ecdsa_addr. let val := addmod( /*column17_row22*/ mload(0x33a0), sub(PRIME, /*initial_ecdsa_addr*/ mload(0x340)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point - 1. // val *= denominator_invs[3]. val := mulmod(val, mload(0x4740), PRIME) // res += val * (coefficients[276] + coefficients[277] * adjustments[4]). res := addmod(res, mulmod(val, add(/*coefficients[276]*/ mload(0x26c0), mulmod(/*coefficients[277]*/ mload(0x26e0), /*adjustments[4]*/mload(0x4e80), PRIME)), PRIME), PRIME) } { // Constraint expression for ecdsa/message_addr: column17_row4118 - (column17_row22 + 1). let val := addmod( /*column17_row4118*/ mload(0x36a0), sub(PRIME, addmod(/*column17_row22*/ mload(0x33a0), 1, PRIME)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 8192) - 1. // val *= denominator_invs[20]. val := mulmod(val, mload(0x4960), PRIME) // res += val * (coefficients[278] + coefficients[279] * adjustments[17]). res := addmod(res, mulmod(val, add(/*coefficients[278]*/ mload(0x2700), mulmod(/*coefficients[279]*/ mload(0x2720), /*adjustments[17]*/mload(0x5020), PRIME)), PRIME), PRIME) } { // Constraint expression for ecdsa/pubkey_addr: column17_row8214 - (column17_row4118 + 1). let val := addmod( /*column17_row8214*/ mload(0x36e0), sub(PRIME, addmod(/*column17_row4118*/ mload(0x36a0), 1, PRIME)), PRIME) // Numerator: point - trace_generator^(8192 * (trace_length / 8192 - 1)). // val *= numerators[9]. val := mulmod(val, mload(0x4dc0), PRIME) // Denominator: point^(trace_length / 8192) - 1. // val *= denominator_invs[20]. val := mulmod(val, mload(0x4960), PRIME) // res += val * (coefficients[280] + coefficients[281] * adjustments[21]). res := addmod(res, mulmod(val, add(/*coefficients[280]*/ mload(0x2740), mulmod(/*coefficients[281]*/ mload(0x2760), /*adjustments[21]*/mload(0x50a0), PRIME)), PRIME), PRIME) } { // Constraint expression for ecdsa/message_value0: column17_row4119 - column20_row30. let val := addmod( /*column17_row4119*/ mload(0x36c0), sub(PRIME, /*column20_row30*/ mload(0x3c80)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 8192) - 1. // val *= denominator_invs[20]. val := mulmod(val, mload(0x4960), PRIME) // res += val * (coefficients[282] + coefficients[283] * adjustments[17]). res := addmod(res, mulmod(val, add(/*coefficients[282]*/ mload(0x2780), mulmod(/*coefficients[283]*/ mload(0x27a0), /*adjustments[17]*/mload(0x5020), PRIME)), PRIME), PRIME) } { // Constraint expression for ecdsa/pubkey_value0: column17_row23 - column19_row7. let val := addmod( /*column17_row23*/ mload(0x33c0), sub(PRIME, /*column19_row7*/ mload(0x3860)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 8192) - 1. // val *= denominator_invs[20]. val := mulmod(val, mload(0x4960), PRIME) // res += val * (coefficients[284] + coefficients[285] * adjustments[17]). res := addmod(res, mulmod(val, add(/*coefficients[284]*/ mload(0x27c0), mulmod(/*coefficients[285]*/ mload(0x27e0), /*adjustments[17]*/mload(0x5020), PRIME)), PRIME), PRIME) } { // Constraint expression for checkpoints/req_pc_init_addr: column17_row150 - initial_checkpoints_addr. let val := addmod( /*column17_row150*/ mload(0x3520), sub(PRIME, /*initial_checkpoints_addr*/ mload(0x360)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point - 1. // val *= denominator_invs[3]. val := mulmod(val, mload(0x4740), PRIME) // res += val * (coefficients[286] + coefficients[287] * adjustments[4]). res := addmod(res, mulmod(val, add(/*coefficients[286]*/ mload(0x2800), mulmod(/*coefficients[287]*/ mload(0x2820), /*adjustments[4]*/mload(0x4e80), PRIME)), PRIME), PRIME) } { // Constraint expression for checkpoints/req_pc_final_addr: column17_row150 - final_checkpoints_addr. let val := addmod( /*column17_row150*/ mload(0x3520), sub(PRIME, /*final_checkpoints_addr*/ mload(0x380)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point - trace_generator^(256 * (trace_length / 256 - 1)). // val *= denominator_invs[22]. val := mulmod(val, mload(0x49a0), PRIME) // res += val * (coefficients[288] + coefficients[289] * adjustments[4]). res := addmod(res, mulmod(val, add(/*coefficients[288]*/ mload(0x2840), mulmod(/*coefficients[289]*/ mload(0x2860), /*adjustments[4]*/mload(0x4e80), PRIME)), PRIME), PRIME) } { // Constraint expression for checkpoints/required_fp_addr: column17_row86 - (column17_row150 + 1). let val := addmod( /*column17_row86*/ mload(0x3460), sub(PRIME, addmod(/*column17_row150*/ mload(0x3520), 1, PRIME)), PRIME) // Numerator: 1. // val *= 1. // val := mulmod(val, 1, PRIME). // Denominator: point^(trace_length / 256) - 1. // val *= denominator_invs[12]. val := mulmod(val, mload(0x4860), PRIME) // res += val * (coefficients[290] + coefficients[291] * adjustments[10]). res := addmod(res, mulmod(val, add(/*coefficients[290]*/ mload(0x2880), mulmod(/*coefficients[291]*/ mload(0x28a0), /*adjustments[10]*/mload(0x4f40), PRIME)), PRIME), PRIME) } { // Constraint expression for checkpoints/required_pc_next_addr: (column17_row406 - column17_row150) * (column17_row406 - (column17_row150 + 2)). let val := mulmod( addmod( /*column17_row406*/ mload(0x3640), sub(PRIME, /*column17_row150*/ mload(0x3520)), PRIME), addmod( /*column17_row406*/ mload(0x3640), sub(PRIME, addmod(/*column17_row150*/ mload(0x3520), 2, PRIME)), PRIME), PRIME) // Numerator: point - trace_generator^(256 * (trace_length / 256 - 1)). // val *= numerators[10]. val := mulmod(val, mload(0x4de0), PRIME) // Denominator: point^(trace_length / 256) - 1. // val *= denominator_invs[12]. val := mulmod(val, mload(0x4860), PRIME) // res += val * (coefficients[292] + coefficients[293] * adjustments[22]). res := addmod(res, mulmod(val, add(/*coefficients[292]*/ mload(0x28c0), mulmod(/*coefficients[293]*/ mload(0x28e0), /*adjustments[22]*/mload(0x50c0), PRIME)), PRIME), PRIME) } { // Constraint expression for checkpoints/req_pc: (column17_row406 - column17_row150) * (column17_row151 - column17_row0). let val := mulmod( addmod( /*column17_row406*/ mload(0x3640), sub(PRIME, /*column17_row150*/ mload(0x3520)), PRIME), addmod( /*column17_row151*/ mload(0x3540), sub(PRIME, /*column17_row0*/ mload(0x3200)), PRIME), PRIME) // Numerator: point - trace_generator^(256 * (trace_length / 256 - 1)). // val *= numerators[10]. val := mulmod(val, mload(0x4de0), PRIME) // Denominator: point^(trace_length / 256) - 1. // val *= denominator_invs[12]. val := mulmod(val, mload(0x4860), PRIME) // res += val * (coefficients[294] + coefficients[295] * adjustments[22]). res := addmod(res, mulmod(val, add(/*coefficients[294]*/ mload(0x2900), mulmod(/*coefficients[295]*/ mload(0x2920), /*adjustments[22]*/mload(0x50c0), PRIME)), PRIME), PRIME) } { // Constraint expression for checkpoints/req_fp: (column17_row406 - column17_row150) * (column17_row87 - column19_row9). let val := mulmod( addmod( /*column17_row406*/ mload(0x3640), sub(PRIME, /*column17_row150*/ mload(0x3520)), PRIME), addmod( /*column17_row87*/ mload(0x3480), sub(PRIME, /*column19_row9*/ mload(0x38a0)), PRIME), PRIME) // Numerator: point - trace_generator^(256 * (trace_length / 256 - 1)). // val *= numerators[10]. val := mulmod(val, mload(0x4de0), PRIME) // Denominator: point^(trace_length / 256) - 1. // val *= denominator_invs[12]. val := mulmod(val, mload(0x4860), PRIME) // res += val * (coefficients[296] + coefficients[297] * adjustments[22]). res := addmod(res, mulmod(val, add(/*coefficients[296]*/ mload(0x2940), mulmod(/*coefficients[297]*/ mload(0x2960), /*adjustments[22]*/mload(0x50c0), PRIME)), PRIME), PRIME) } mstore(0, res) return(0, 0x20) } } } } contract CpuPublicInputOffsets { // The following constants are offsets of data expected in the public input. uint256 internal constant OFFSET_LOG_N_STEPS = 0; uint256 internal constant OFFSET_RC_MIN = 1; uint256 internal constant OFFSET_RC_MAX = 2; uint256 internal constant OFFSET_LAYOUT_CODE = 3; uint256 internal constant OFFSET_PROGRAM_BEGIN_ADDR = 4; uint256 internal constant OFFSET_PROGRAM_STOP_PTR = 5; uint256 internal constant OFFSET_EXECUTION_BEGIN_ADDR = 6; uint256 internal constant OFFSET_EXECUTION_STOP_PTR = 7; uint256 internal constant OFFSET_OUTPUT_BEGIN_ADDR = 8; uint256 internal constant OFFSET_OUTPUT_STOP_PTR = 9; uint256 internal constant OFFSET_PEDERSEN_BEGIN_ADDR = 10; uint256 internal constant OFFSET_PEDERSEN_STOP_PTR = 11; uint256 internal constant OFFSET_RANGE_CHECK_BEGIN_ADDR = 12; uint256 internal constant OFFSET_RANGE_CHECK_STOP_PTR = 13; uint256 internal constant OFFSET_ECDSA_BEGIN_ADDR = 14; uint256 internal constant OFFSET_ECDSA_STOP_PTR = 15; uint256 internal constant OFFSET_CHECKPOINTS_BEGIN_PTR = 16; uint256 internal constant OFFSET_CHECKPOINTS_STOP_PTR = 17; uint256 internal constant OFFSET_N_PUBLIC_MEMORY_PAGES = 18; uint256 internal constant OFFSET_PUBLIC_MEMORY = 19; uint256 internal constant N_WORDS_PER_PUBLIC_MEMORY_ENTRY = 2; // The format of the public input, starting at OFFSET_PUBLIC_MEMORY is as follows: // * For each page: // * First address in the page (this field is not included for the first page). // * Page size. // * Page hash. // * Padding cell address. // * Padding cell value. // # All data above this line, appears in the initial seed of the proof. // * For each page: // * Cumulative product. function getOffsetPageSize(uint256 pageId) internal pure returns (uint256) { return OFFSET_PUBLIC_MEMORY + 3 * pageId; } function getOffsetPageHash(uint256 pageId) internal pure returns (uint256) { return OFFSET_PUBLIC_MEMORY + 3 * pageId + 1; } function getOffsetPageAddr(uint256 pageId) internal pure returns (uint256) { require(pageId >= 1, "Address of page 0 is not part of the public input."); return OFFSET_PUBLIC_MEMORY + 3 * pageId - 1; } /* Returns the offset of the address of the padding cell. The offset of the padding cell value can be obtained by adding 1 to the result. */ function getOffsetPaddingCell(uint256 nPages) internal pure returns (uint256) { return OFFSET_PUBLIC_MEMORY + 3 * nPages - 1; } function getOffsetPageProd(uint256 pageId, uint256 nPages) internal pure returns (uint256) { return OFFSET_PUBLIC_MEMORY + 3 * nPages + 1 + pageId; } function getPublicInputLength(uint256 nPages) internal pure returns (uint256) { return OFFSET_PUBLIC_MEMORY + 4 * nPages + 1; } } contract PeriodicColumnContract { function compute(uint256 x) external pure returns(uint256 result); } contract IFactRegistry { /* Returns true if the given fact was previously registered in the contract. */ function isValid(bytes32 fact) external view returns(bool); } contract IMerkleVerifier { uint256 constant internal MAX_N_MERKLE_VERIFIER_QUERIES = 128; function verify( uint256 channelPtr, uint256 queuePtr, bytes32 root, uint256 n) internal view returns (bytes32 hash); } contract IQueryableFactRegistry is IFactRegistry { /* Returns true if at least one fact has been registered. */ function hasRegisteredFact() external view returns(bool); } contract IStarkVerifier { function verifyProof( uint256[] memory proofParams, uint256[] memory proof, uint256[] memory publicInput ) internal view; } contract MemoryMap { /* We store the state of the verifer in a contiguous chunk of memory. The offsets of the different fields are listed below. E.g. The offset of the i'th hash is [mm_hashes + i]. */ uint256 constant internal CHANNEL_STATE_SIZE = 3; uint256 constant internal MAX_N_QUERIES = 48; uint256 constant internal FRI_QUEUE_SIZE = MAX_N_QUERIES; uint256 constant internal MAX_SUPPORTED_MAX_FRI_STEP = 4; uint256 constant internal MM_EVAL_DOMAIN_SIZE = 0x0; uint256 constant internal MM_BLOW_UP_FACTOR = 0x1; uint256 constant internal MM_LOG_EVAL_DOMAIN_SIZE = 0x2; uint256 constant internal MM_PROOF_OF_WORK_BITS = 0x3; uint256 constant internal MM_EVAL_DOMAIN_GENERATOR = 0x4; uint256 constant internal MM_PUBLIC_INPUT_PTR = 0x5; uint256 constant internal MM_TRACE_COMMITMENT = 0x6; // uint256[2] uint256 constant internal MM_OODS_COMMITMENT = 0x8; uint256 constant internal MM_N_UNIQUE_QUERIES = 0x9; uint256 constant internal MM_CHANNEL = 0xa; // uint256[3] uint256 constant internal MM_MERKLE_QUEUE = 0xd; // uint256[96] uint256 constant internal MM_FRI_QUEUE = 0x6d; // uint256[144] uint256 constant internal MM_FRI_QUERIES_DELIMITER = 0xfd; uint256 constant internal MM_FRI_CTX = 0xfe; // uint256[40] uint256 constant internal MM_FRI_STEPS_PTR = 0x126; uint256 constant internal MM_FRI_EVAL_POINTS = 0x127; // uint256[10] uint256 constant internal MM_FRI_COMMITMENTS = 0x131; // uint256[10] uint256 constant internal MM_FRI_LAST_LAYER_DEG_BOUND = 0x13b; uint256 constant internal MM_FRI_LAST_LAYER_PTR = 0x13c; uint256 constant internal MM_CONSTRAINT_POLY_ARGS_START = 0x13d; uint256 constant internal MM_PERIODIC_COLUMN__PEDERSEN__POINTS__X = 0x13d; uint256 constant internal MM_PERIODIC_COLUMN__PEDERSEN__POINTS__Y = 0x13e; uint256 constant internal MM_PERIODIC_COLUMN__ECDSA__GENERATOR_POINTS__X = 0x13f; uint256 constant internal MM_PERIODIC_COLUMN__ECDSA__GENERATOR_POINTS__Y = 0x140; uint256 constant internal MM_TRACE_LENGTH = 0x141; uint256 constant internal MM_OFFSET_SIZE = 0x142; uint256 constant internal MM_HALF_OFFSET_SIZE = 0x143; uint256 constant internal MM_INITIAL_AP = 0x144; uint256 constant internal MM_INITIAL_PC = 0x145; uint256 constant internal MM_FINAL_AP = 0x146; uint256 constant internal MM_FINAL_PC = 0x147; uint256 constant internal MM_MEMORY__MULTI_COLUMN_PERM__PERM__INTERACTION_ELM = 0x148; uint256 constant internal MM_MEMORY__MULTI_COLUMN_PERM__HASH_INTERACTION_ELM0 = 0x149; uint256 constant internal MM_MEMORY__MULTI_COLUMN_PERM__PERM__PUBLIC_MEMORY_PROD = 0x14a; uint256 constant internal MM_RC16__PERM__INTERACTION_ELM = 0x14b; uint256 constant internal MM_RC16__PERM__PUBLIC_MEMORY_PROD = 0x14c; uint256 constant internal MM_RC_MIN = 0x14d; uint256 constant internal MM_RC_MAX = 0x14e; uint256 constant internal MM_PEDERSEN__SHIFT_POINT_X = 0x14f; uint256 constant internal MM_PEDERSEN__SHIFT_POINT_Y = 0x150; uint256 constant internal MM_INITIAL_PEDERSEN_ADDR = 0x151; uint256 constant internal MM_INITIAL_RC_ADDR = 0x152; uint256 constant internal MM_ECDSA__SIG_CONFIG_ALPHA = 0x153; uint256 constant internal MM_ECDSA__SIG_CONFIG_SHIFT_POINT_X = 0x154; uint256 constant internal MM_ECDSA__SIG_CONFIG_SHIFT_POINT_Y = 0x155; uint256 constant internal MM_ECDSA__SIG_CONFIG_BETA = 0x156; uint256 constant internal MM_INITIAL_ECDSA_ADDR = 0x157; uint256 constant internal MM_INITIAL_CHECKPOINTS_ADDR = 0x158; uint256 constant internal MM_FINAL_CHECKPOINTS_ADDR = 0x159; uint256 constant internal MM_TRACE_GENERATOR = 0x15a; uint256 constant internal MM_OODS_POINT = 0x15b; uint256 constant internal MM_INTERACTION_ELEMENTS = 0x15c; // uint256[3] uint256 constant internal MM_COEFFICIENTS = 0x15f; // uint256[298] uint256 constant internal MM_OODS_VALUES = 0x289; // uint256[173] uint256 constant internal MM_CONSTRAINT_POLY_ARGS_END = 0x336; uint256 constant internal MM_COMPOSITION_OODS_VALUES = 0x336; // uint256[2] uint256 constant internal MM_OODS_EVAL_POINTS = 0x338; // uint256[48] uint256 constant internal MM_OODS_COEFFICIENTS = 0x368; // uint256[175] uint256 constant internal MM_TRACE_QUERY_RESPONSES = 0x417; // uint256[1056] uint256 constant internal MM_COMPOSITION_QUERY_RESPONSES = 0x837; // uint256[96] uint256 constant internal MM_LOG_N_STEPS = 0x897; uint256 constant internal MM_N_PUBLIC_MEM_ENTRIES = 0x898; uint256 constant internal MM_N_PUBLIC_MEM_PAGES = 0x899; uint256 constant internal MM_CONTEXT_SIZE = 0x89a; } contract MemoryPageFactRegistryConstants { // A page based on a list of pairs (address, value). // In this case, memoryHash = hash(address, value, address, value, address, value, ...). uint256 internal constant REGULAR_PAGE = 0; // A page based on adjacent memory cells, starting from a given address. // In this case, memoryHash = hash(value, value, value, ...). uint256 internal constant CONTINUOUS_PAGE = 1; } contract MerkleStatementVerifier is IMerkleVerifier { MerkleStatementContract merkleStatementContract; constructor(address merkleStatementContractAddress) internal { merkleStatementContract = MerkleStatementContract(merkleStatementContractAddress); } // Computes the hash of the Merkle statement, and verifies that it is registered in the // Merkle Fact Registry. Receives as input the queuePtr (as address), its length // the numbers of queries n, and the root. The channelPtr is is ignored. function verify(uint256 /*channelPtr*/, uint256 queuePtr, bytes32 root, uint256 n) internal view returns(bytes32) { bytes32 statement; require(n <= MAX_N_MERKLE_VERIFIER_QUERIES, "TOO_MANY_MERKLE_QUERIES"); assembly { let dataToHashPtrStart := mload(0x40) // freePtr. let dataToHashPtrCur := dataToHashPtrStart let queEndPtr := add(queuePtr, mul(n, 0x40)) for { } lt(queuePtr, queEndPtr) { } { mstore(dataToHashPtrCur, mload(queuePtr)) dataToHashPtrCur := add(dataToHashPtrCur, 0x20) queuePtr := add(queuePtr, 0x20) } mstore(dataToHashPtrCur, root) dataToHashPtrCur := add(dataToHashPtrCur, 0x20) mstore(0x40, dataToHashPtrCur) statement := keccak256(dataToHashPtrStart, sub(dataToHashPtrCur, dataToHashPtrStart)) } require(merkleStatementContract.isValid(statement), "INVALIDATED_MERKLE_STATEMENT"); return root; } } contract MerkleVerifier is IMerkleVerifier { function getHashMask() internal pure returns(uint256) { // Default implementation. return 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF000000000000000000000000; } /* Verifies a Merkle tree decommitment for n leaves in a Merkle tree with N leaves. The inputs data sits in the queue at queuePtr. Each slot in the queue contains a 32 bytes leaf index and a 32 byte leaf value. The indices need to be in the range [N..2*N-1] and strictly incrementing. Decommitments are read from the channel in the ctx. The input data is destroyed during verification. */ function verify( uint256 channelPtr, uint256 queuePtr, bytes32 root, uint256 n) internal view returns (bytes32 hash) { uint256 lhashMask = getHashMask(); require(n <= MAX_N_MERKLE_VERIFIER_QUERIES, "TOO_MANY_MERKLE_QUERIES"); assembly { // queuePtr + i * 0x40 gives the i'th index in the queue. // hashesPtr + i * 0x40 gives the i'th hash in the queue. let hashesPtr := add(queuePtr, 0x20) let queueSize := mul(n, 0x40) let slotSize := 0x40 // The items are in slots [0, n-1]. let rdIdx := 0 let wrIdx := 0 // = n % n. // Iterate the queue until we hit the root. let index := mload(add(rdIdx, queuePtr)) let proofPtr := mload(channelPtr) // while(index > 1). for { } gt(index, 1) { } { let siblingIndex := xor(index, 1) // sibblingOffset := 0x20 * lsb(siblingIndex). let sibblingOffset := mulmod(siblingIndex, 0x20, 0x40) // Store the hash corresponding to index in the correct slot. // 0 if index is even and 0x20 if index is odd. // The hash of the sibling will be written to the other slot. mstore(xor(0x20, sibblingOffset), mload(add(rdIdx, hashesPtr))) rdIdx := addmod(rdIdx, slotSize, queueSize) // Inline channel operation: // Assume we are going to read a new hash from the proof. // If this is not the case add(proofPtr, 0x20) will be reverted. let newHashPtr := proofPtr proofPtr := add(proofPtr, 0x20) // Push index/2 into the queue, before reading the next index. // The order is important, as otherwise we may try to read from an empty queue (in // the case where we are working on one item). // wrIdx will be updated after writing the relevant hash to the queue. mstore(add(wrIdx, queuePtr), div(index, 2)) // Load the next index from the queue and check if it is our sibling. index := mload(add(rdIdx, queuePtr)) if eq(index, siblingIndex) { // Take sibling from queue rather than from proof. newHashPtr := add(rdIdx, hashesPtr) // Revert reading from proof. proofPtr := sub(proofPtr, 0x20) rdIdx := addmod(rdIdx, slotSize, queueSize) // Index was consumed, read the next one. // Note that the queue can't be empty at this point. // The index of the parent of the current node was already pushed into the // queue, and the parent is never the sibling. index := mload(add(rdIdx, queuePtr)) } mstore(sibblingOffset, mload(newHashPtr)) // Push the new hash to the end of the queue. mstore(add(wrIdx, hashesPtr), and(lhashMask, keccak256(0x00, 0x40))) wrIdx := addmod(wrIdx, slotSize, queueSize) } hash := mload(add(rdIdx, hashesPtr)) // Update the proof pointer in the context. mstore(channelPtr, proofPtr) } // emit LogBool(hash == root); require(hash == root, "INVALID_MERKLE_PROOF"); } } contract PrimeFieldElement0 { uint256 constant internal K_MODULUS = 0x800000000000011000000000000000000000000000000000000000000000001; uint256 constant internal K_MODULUS_MASK = 0x0fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff; uint256 constant internal K_MONTGOMERY_R = 0x7fffffffffffdf0ffffffffffffffffffffffffffffffffffffffffffffffe1; uint256 constant internal K_MONTGOMERY_R_INV = 0x40000000000001100000000000012100000000000000000000000000000000; uint256 constant internal GENERATOR_VAL = 3; uint256 constant internal ONE_VAL = 1; uint256 constant internal GEN1024_VAL = 0x659d83946a03edd72406af6711825f5653d9e35dc125289a206c054ec89c4f1; function fromMontgomery(uint256 val) internal pure returns (uint256 res) { // uint256 res = fmul(val, kMontgomeryRInv); assembly { res := mulmod(val, 0x40000000000001100000000000012100000000000000000000000000000000, 0x800000000000011000000000000000000000000000000000000000000000001) } return res; } function fromMontgomeryBytes(bytes32 bs) internal pure returns (uint256) { // Assuming bs is a 256bit bytes object, in Montgomery form, it is read into a field // element. uint256 res = uint256(bs); return fromMontgomery(res); } function toMontgomeryInt(uint256 val) internal pure returns (uint256 res) { //uint256 res = fmul(val, kMontgomeryR); assembly { res := mulmod(val, 0x7fffffffffffdf0ffffffffffffffffffffffffffffffffffffffffffffffe1, 0x800000000000011000000000000000000000000000000000000000000000001) } return res; } function fmul(uint256 a, uint256 b) internal pure returns (uint256 res) { //uint256 res = mulmod(a, b, kModulus); assembly { res := mulmod(a, b, 0x800000000000011000000000000000000000000000000000000000000000001) } return res; } function fadd(uint256 a, uint256 b) internal pure returns (uint256 res) { // uint256 res = addmod(a, b, kModulus); assembly { res := addmod(a, b, 0x800000000000011000000000000000000000000000000000000000000000001) } return res; } function fsub(uint256 a, uint256 b) internal pure returns (uint256 res) { // uint256 res = addmod(a, kModulus - b, kModulus); assembly { res := addmod( a, sub(0x800000000000011000000000000000000000000000000000000000000000001, b), 0x800000000000011000000000000000000000000000000000000000000000001) } return res; } function fpow(uint256 val, uint256 exp) internal view returns (uint256) { return expmod(val, exp, K_MODULUS); } function expmod(uint256 base, uint256 exponent, uint256 modulus) internal view returns (uint256 res) { assembly { let p := mload(0x40) mstore(p, 0x20) // Length of Base. mstore(add(p, 0x20), 0x20) // Length of Exponent. mstore(add(p, 0x40), 0x20) // Length of Modulus. mstore(add(p, 0x60), base) // Base. mstore(add(p, 0x80), exponent) // Exponent. mstore(add(p, 0xa0), modulus) // Modulus. // Call modexp precompile. if iszero(staticcall(gas, 0x05, p, 0xc0, p, 0x20)) { revert(0, 0) } res := mload(p) } } function inverse(uint256 val) internal view returns (uint256) { return expmod(val, K_MODULUS - 2, K_MODULUS); } } contract Prng is PrimeFieldElement0 { function storePrng(uint256 statePtr, bytes32 digest, uint256 counter) internal pure { assembly { mstore(statePtr, digest) mstore(add(statePtr, 0x20), counter) } } function loadPrng(uint256 statePtr) internal pure returns (bytes32, uint256) { bytes32 digest; uint256 counter; assembly { digest := mload(statePtr) counter := mload(add(statePtr, 0x20)) } return (digest, counter); } function initPrng(uint256 prngPtr, bytes32 publicInputHash) internal pure { storePrng(prngPtr, /*keccak256(publicInput)*/ publicInputHash, 0); } /* Auxiliary function for getRandomBytes. */ function getRandomBytesInner(bytes32 digest, uint256 counter) internal pure returns (bytes32, uint256, bytes32) { // returns 32 bytes (for random field elements or four queries at a time). bytes32 randomBytes = keccak256(abi.encodePacked(digest, counter)); return (digest, counter + 1, randomBytes); } /* Returns 32 bytes. Used for a random field element, or for 4 query indices. */ function getRandomBytes(uint256 prngPtr) internal pure returns (bytes32 randomBytes) { bytes32 digest; uint256 counter; (digest, counter) = loadPrng(prngPtr); // returns 32 bytes (for random field elements or four queries at a time). (digest, counter, randomBytes) = getRandomBytesInner(digest, counter); storePrng(prngPtr, digest, counter); return randomBytes; } function mixSeedWithBytes(uint256 prngPtr, bytes memory dataBytes) internal pure { bytes32 digest; assembly { digest := mload(prngPtr) } initPrng(prngPtr, keccak256(abi.encodePacked(digest, dataBytes))); } function getPrngDigest(uint256 prngPtr) internal pure returns (bytes32 digest) { assembly { digest := mload(prngPtr) } } } contract StarkParameters is PrimeFieldElement0 { uint256 constant internal N_COEFFICIENTS = 298; uint256 constant internal N_INTERACTION_ELEMENTS = 3; uint256 constant internal MASK_SIZE = 173; uint256 constant internal N_ROWS_IN_MASK = 78; uint256 constant internal N_COLUMNS_IN_MASK = 22; uint256 constant internal N_COLUMNS_IN_TRACE0 = 21; uint256 constant internal N_COLUMNS_IN_TRACE1 = 1; uint256 constant internal CONSTRAINTS_DEGREE_BOUND = 2; uint256 constant internal N_OODS_VALUES = MASK_SIZE + CONSTRAINTS_DEGREE_BOUND; uint256 constant internal N_OODS_COEFFICIENTS = N_OODS_VALUES; uint256 constant internal MAX_FRI_STEP = 3; // ---------- // Air specific constants. ---------- uint256 constant internal PUBLIC_MEMORY_STEP = 8; uint256 constant internal PEDERSEN_BUILTIN_RATIO = 8; uint256 constant internal PEDERSEN_BUILTIN_REPETITIONS = 4; uint256 constant internal RC_BUILTIN_RATIO = 8; uint256 constant internal RC_N_PARTS = 8; uint256 constant internal ECDSA_BUILTIN_RATIO = 512; uint256 constant internal ECDSA_BUILTIN_REPETITIONS = 1; uint256 constant internal LAYOUT_CODE = 6579576; uint256 constant internal LOG_CPU_COMPONENT_HEIGHT = 4; } contract VerifierChannel is Prng { /* We store the state of the channel in uint256[3] as follows: [0] proof pointer. [1] prng digest. [2] prng counter. */ uint256 constant internal CHANNEL_STATE_SIZE = 3; event LogValue(bytes32 val); event SendRandomnessEvent(uint256 val); event ReadFieldElementEvent(uint256 val); event ReadHashEvent(bytes32 val); function getPrngPtr(uint256 channelPtr) internal pure returns (uint256) { return channelPtr + 0x20; } function initChannel(uint256 channelPtr, uint256 proofPtr, bytes32 publicInputHash) internal pure { assembly { // Skip 0x20 bytes length at the beginning of the proof. mstore(channelPtr, add(proofPtr, 0x20)) } initPrng(getPrngPtr(channelPtr), publicInputHash); } function sendFieldElements(uint256 channelPtr, uint256 nElements, uint256 targetPtr) internal pure { require(nElements < 0x1000000, "Overflow protection failed."); assembly { let PRIME := 0x800000000000011000000000000000000000000000000000000000000000001 let PRIME_MON_R_INV := 0x40000000000001100000000000012100000000000000000000000000000000 let PRIME_MASK := 0x0fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff let digestPtr := add(channelPtr, 0x20) let counterPtr := add(channelPtr, 0x40) let endPtr := add(targetPtr, mul(nElements, 0x20)) for { } lt(targetPtr, endPtr) { targetPtr := add(targetPtr, 0x20) } { // *targetPtr = getRandomFieldElement(getPrngPtr(channelPtr)); let fieldElement := PRIME // while (fieldElement >= PRIME). for { } iszero(lt(fieldElement, PRIME)) { } { // keccak256(abi.encodePacked(digest, counter)); fieldElement := and(keccak256(digestPtr, 0x40), PRIME_MASK) // *counterPtr += 1; mstore(counterPtr, add(mload(counterPtr), 1)) } // *targetPtr = fromMontgomery(fieldElement); mstore(targetPtr, mulmod(fieldElement, PRIME_MON_R_INV, PRIME)) // emit ReadFieldElementEvent(fieldElement); // log1(targetPtr, 0x20, 0x4bfcc54f35095697be2d635fb0706801e13637312eff0cedcdfc254b3b8c385e); } } } /* Sends random queries and returns an array of queries sorted in ascending order. Generates count queries in the range [0, mask] and returns the number of unique queries. Note that mask is of the form 2^k-1 (for some k). Note that queriesOutPtr may be (and is) inteleaved with other arrays. The stride parameter is passed to indicate the distance between every two entries to the queries array, i.e. stride = 0x20*(number of interleaved arrays). */ function sendRandomQueries( uint256 channelPtr, uint256 count, uint256 mask, uint256 queriesOutPtr, uint256 stride) internal pure returns (uint256) { uint256 val; uint256 shift = 0; uint256 endPtr = queriesOutPtr; for (uint256 i = 0; i < count; i++) { if (shift == 0) { val = uint256(getRandomBytes(getPrngPtr(channelPtr))); shift = 0x100; } shift -= 0x40; uint256 queryIdx = (val >> shift) & mask; // emit sendRandomnessEvent(queryIdx); uint256 ptr = endPtr; uint256 curr; // Insert new queryIdx in the correct place like insertion sort. while (ptr > queriesOutPtr) { assembly { curr := mload(sub(ptr, stride)) } if (queryIdx >= curr) { break; } assembly { mstore(ptr, curr) } ptr -= stride; } if (queryIdx != curr) { assembly { mstore(ptr, queryIdx) } endPtr += stride; } else { // Revert right shuffling. while (ptr < endPtr) { assembly { mstore(ptr, mload(add(ptr, stride))) ptr := add(ptr, stride) } } } } return (endPtr - queriesOutPtr) / stride; } function readBytes(uint256 channelPtr, bool mix) internal pure returns (bytes32) { uint256 proofPtr; bytes32 val; assembly { proofPtr := mload(channelPtr) val := mload(proofPtr) mstore(channelPtr, add(proofPtr, 0x20)) } if (mix) { // inline: Prng.mixSeedWithBytes(getPrngPtr(channelPtr), abi.encodePacked(val)); assembly { let digestPtr := add(channelPtr, 0x20) let counterPtr := add(digestPtr, 0x20) mstore(counterPtr, val) // prng.digest := keccak256(digest||val), nonce was written earlier. mstore(digestPtr, keccak256(digestPtr, 0x40)) // prng.counter := 0. mstore(counterPtr, 0) } } return val; } function readHash(uint256 channelPtr, bool mix) internal pure returns (bytes32) { bytes32 val = readBytes(channelPtr, mix); // emit ReadHashEvent(val); return val; } function readFieldElement(uint256 channelPtr, bool mix) internal pure returns (uint256) { uint256 val = fromMontgomery(uint256(readBytes(channelPtr, mix))); // emit ReadFieldElementEvent(val); return val; } function verifyProofOfWork(uint256 channelPtr, uint256 proofOfWorkBits) internal pure { if (proofOfWorkBits == 0) { return; } uint256 proofOfWorkDigest; assembly { // [0:29] := 0123456789abcded || digest || workBits. mstore(0, 0x0123456789abcded000000000000000000000000000000000000000000000000) let digest := mload(add(channelPtr, 0x20)) mstore(0x8, digest) mstore8(0x28, proofOfWorkBits) mstore(0, keccak256(0, 0x29)) let proofPtr := mload(channelPtr) mstore(0x20, mload(proofPtr)) // proofOfWorkDigest:= keccak256(keccak256(0123456789abcded || digest || workBits) || nonce). proofOfWorkDigest := keccak256(0, 0x28) mstore(0, digest) // prng.digest := keccak256(digest||nonce), nonce was written earlier. mstore(add(channelPtr, 0x20), keccak256(0, 0x28)) // prng.counter := 0. mstore(add(channelPtr, 0x40), 0) mstore(channelPtr, add(proofPtr, 0x8)) } uint256 proofOfWorkThreshold = uint256(1) << (256 - proofOfWorkBits); require(proofOfWorkDigest < proofOfWorkThreshold, "Proof of work check failed."); } } contract FactRegistry is IQueryableFactRegistry { // Mapping: fact hash -> true. mapping (bytes32 => bool) private verifiedFact; // Indicates whether the Fact Registry has at least one fact registered. bool anyFactRegistered; /* Checks if a fact has been verified. */ function isValid(bytes32 fact) external view returns(bool) { return _factCheck(fact); } /* This is an internal method to check if the fact is already registered. In current implementation of FactRegistry it's identical to isValid(). But the check is against the local fact registry, So for a derived referral fact registry, it's not the same. */ function _factCheck(bytes32 fact) internal view returns(bool) { return verifiedFact[fact]; } function registerFact( bytes32 factHash ) internal { // This function stores the fact hash in the mapping. verifiedFact[factHash] = true; // Mark first time off. if (!anyFactRegistered) { anyFactRegistered = true; } } /* Indicates whether at least one fact was registered. */ function hasRegisteredFact() external view returns(bool) { return anyFactRegistered; } } contract FriLayer is MerkleVerifier, PrimeFieldElement0 { event LogGas(string name, uint256 val); uint256 constant internal FRI_MAX_FRI_STEP = 4; uint256 constant internal MAX_COSET_SIZE = 2**FRI_MAX_FRI_STEP; // Generator of the group of size MAX_COSET_SIZE: GENERATOR_VAL**((PRIME - 1)/MAX_COSET_SIZE). uint256 constant internal FRI_GROUP_GEN = 0x5ec467b88826aba4537602d514425f3b0bdf467bbf302458337c45f6021e539; uint256 constant internal FRI_GROUP_SIZE = 0x20 * MAX_COSET_SIZE; uint256 constant internal FRI_CTX_TO_COSET_EVALUATIONS_OFFSET = 0; uint256 constant internal FRI_CTX_TO_FRI_GROUP_OFFSET = FRI_GROUP_SIZE; uint256 constant internal FRI_CTX_TO_FRI_HALF_INV_GROUP_OFFSET = FRI_CTX_TO_FRI_GROUP_OFFSET + FRI_GROUP_SIZE; uint256 constant internal FRI_CTX_SIZE = FRI_CTX_TO_FRI_HALF_INV_GROUP_OFFSET + (FRI_GROUP_SIZE / 2); function nextLayerElementFromTwoPreviousLayerElements( uint256 fX, uint256 fMinusX, uint256 evalPoint, uint256 xInv) internal pure returns (uint256 res) { // Folding formula: // f(x) = g(x^2) + xh(x^2) // f(-x) = g((-x)^2) - xh((-x)^2) = g(x^2) - xh(x^2) // => // 2g(x^2) = f(x) + f(-x) // 2h(x^2) = (f(x) - f(-x))/x // => The 2*interpolation at evalPoint is: // 2*(g(x^2) + evalPoint*h(x^2)) = f(x) + f(-x) + evalPoint*(f(x) - f(-x))*xInv. // // Note that multiplying by 2 doesn't affect the degree, // so we can just agree to do that on both the prover and verifier. assembly { // PRIME is PrimeFieldElement0.K_MODULUS. let PRIME := 0x800000000000011000000000000000000000000000000000000000000000001 // Note that whenever we call add(), the result is always less than 2*PRIME, // so there are no overflows. res := addmod(add(fX, fMinusX), mulmod(mulmod(evalPoint, xInv, PRIME), add(fX, /*-fMinusX*/sub(PRIME, fMinusX)), PRIME), PRIME) } } /* Reads 4 elements, and applies 2 + 1 FRI transformations to obtain a single element. FRI layer n: f0 f1 f2 f3 ----------------------------------------- \ / -- \ / ----------- FRI layer n+1: f0 f2 -------------------------------------------- \ ---/ ------------- FRI layer n+2: f0 The basic FRI transformation is described in nextLayerElementFromTwoPreviousLayerElements(). */ function do2FriSteps( uint256 friHalfInvGroupPtr, uint256 evaluationsOnCosetPtr, uint256 cosetOffset_, uint256 friEvalPoint) internal pure returns (uint256 nextLayerValue, uint256 nextXInv) { assembly { let PRIME := 0x800000000000011000000000000000000000000000000000000000000000001 let friEvalPointDivByX := mulmod(friEvalPoint, cosetOffset_, PRIME) let f0 := mload(evaluationsOnCosetPtr) { let f1 := mload(add(evaluationsOnCosetPtr, 0x20)) // f0 < 3P ( = 1 + 1 + 1). f0 := add(add(f0, f1), mulmod(friEvalPointDivByX, add(f0, /*-fMinusX*/sub(PRIME, f1)), PRIME)) } let f2 := mload(add(evaluationsOnCosetPtr, 0x40)) { let f3 := mload(add(evaluationsOnCosetPtr, 0x60)) f2 := addmod(add(f2, f3), mulmod(add(f2, /*-fMinusX*/sub(PRIME, f3)), mulmod(mload(add(friHalfInvGroupPtr, 0x20)), friEvalPointDivByX, PRIME), PRIME), PRIME) } { let newXInv := mulmod(cosetOffset_, cosetOffset_, PRIME) nextXInv := mulmod(newXInv, newXInv, PRIME) } // f0 + f2 < 4P ( = 3 + 1). nextLayerValue := addmod(add(f0, f2), mulmod(mulmod(friEvalPointDivByX, friEvalPointDivByX, PRIME), add(f0, /*-fMinusX*/sub(PRIME, f2)), PRIME), PRIME) } } /* Reads 8 elements, and applies 4 + 2 + 1 FRI transformation to obtain a single element. See do2FriSteps for more detailed explanation. */ function do3FriSteps( uint256 friHalfInvGroupPtr, uint256 evaluationsOnCosetPtr, uint256 cosetOffset_, uint256 friEvalPoint) internal pure returns (uint256 nextLayerValue, uint256 nextXInv) { assembly { let PRIME := 0x800000000000011000000000000000000000000000000000000000000000001 let MPRIME := 0x8000000000000110000000000000000000000000000000000000000000000010 let f0 := mload(evaluationsOnCosetPtr) let friEvalPointDivByX := mulmod(friEvalPoint, cosetOffset_, PRIME) let friEvalPointDivByXSquared := mulmod(friEvalPointDivByX, friEvalPointDivByX, PRIME) let imaginaryUnit := mload(add(friHalfInvGroupPtr, 0x20)) { let f1 := mload(add(evaluationsOnCosetPtr, 0x20)) // f0 < 3P ( = 1 + 1 + 1). f0 := add(add(f0, f1), mulmod(friEvalPointDivByX, add(f0, /*-fMinusX*/sub(PRIME, f1)), PRIME)) } { let f2 := mload(add(evaluationsOnCosetPtr, 0x40)) { let f3 := mload(add(evaluationsOnCosetPtr, 0x60)) // f2 < 3P ( = 1 + 1 + 1). f2 := add(add(f2, f3), mulmod(add(f2, /*-fMinusX*/sub(PRIME, f3)), mulmod(friEvalPointDivByX, imaginaryUnit, PRIME), PRIME)) } // f0 < 7P ( = 3 + 3 + 1). f0 := add(add(f0, f2), mulmod(friEvalPointDivByXSquared, add(f0, /*-fMinusX*/sub(MPRIME, f2)), PRIME)) } { let f4 := mload(add(evaluationsOnCosetPtr, 0x80)) { let friEvalPointDivByX2 := mulmod(friEvalPointDivByX, mload(add(friHalfInvGroupPtr, 0x40)), PRIME) { let f5 := mload(add(evaluationsOnCosetPtr, 0xa0)) // f4 < 3P ( = 1 + 1 + 1). f4 := add(add(f4, f5), mulmod(friEvalPointDivByX2, add(f4, /*-fMinusX*/sub(PRIME, f5)), PRIME)) } let f6 := mload(add(evaluationsOnCosetPtr, 0xc0)) { let f7 := mload(add(evaluationsOnCosetPtr, 0xe0)) // f6 < 3P ( = 1 + 1 + 1). f6 := add(add(f6, f7), mulmod(add(f6, /*-fMinusX*/sub(PRIME, f7)), // friEvalPointDivByX2 * imaginaryUnit == // friEvalPointDivByX * mload(add(friHalfInvGroupPtr, 0x60)). mulmod(friEvalPointDivByX2, imaginaryUnit, PRIME), PRIME)) } // f4 < 7P ( = 3 + 3 + 1). f4 := add(add(f4, f6), mulmod(mulmod(friEvalPointDivByX2, friEvalPointDivByX2, PRIME), add(f4, /*-fMinusX*/sub(MPRIME, f6)), PRIME)) } // f0, f4 < 7P -> f0 + f4 < 14P && 9P < f0 + (MPRIME - f4) < 23P. nextLayerValue := addmod(add(f0, f4), mulmod(mulmod(friEvalPointDivByXSquared, friEvalPointDivByXSquared, PRIME), add(f0, /*-fMinusX*/sub(MPRIME, f4)), PRIME), PRIME) } { let xInv2 := mulmod(cosetOffset_, cosetOffset_, PRIME) let xInv4 := mulmod(xInv2, xInv2, PRIME) nextXInv := mulmod(xInv4, xInv4, PRIME) } } } /* This function reads 16 elements, and applies 8 + 4 + 2 + 1 fri transformation to obtain a single element. See do2FriSteps for more detailed explanation. */ function do4FriSteps( uint256 friHalfInvGroupPtr, uint256 evaluationsOnCosetPtr, uint256 cosetOffset_, uint256 friEvalPoint) internal pure returns (uint256 nextLayerValue, uint256 nextXInv) { assembly { let friEvalPointDivByXTessed let PRIME := 0x800000000000011000000000000000000000000000000000000000000000001 let MPRIME := 0x8000000000000110000000000000000000000000000000000000000000000010 let f0 := mload(evaluationsOnCosetPtr) let friEvalPointDivByX := mulmod(friEvalPoint, cosetOffset_, PRIME) let imaginaryUnit := mload(add(friHalfInvGroupPtr, 0x20)) { let f1 := mload(add(evaluationsOnCosetPtr, 0x20)) // f0 < 3P ( = 1 + 1 + 1). f0 := add(add(f0, f1), mulmod(friEvalPointDivByX, add(f0, /*-fMinusX*/sub(PRIME, f1)), PRIME)) } { let f2 := mload(add(evaluationsOnCosetPtr, 0x40)) { let f3 := mload(add(evaluationsOnCosetPtr, 0x60)) // f2 < 3P ( = 1 + 1 + 1). f2 := add(add(f2, f3), mulmod(add(f2, /*-fMinusX*/sub(PRIME, f3)), mulmod(friEvalPointDivByX, imaginaryUnit, PRIME), PRIME)) } { let friEvalPointDivByXSquared := mulmod(friEvalPointDivByX, friEvalPointDivByX, PRIME) friEvalPointDivByXTessed := mulmod(friEvalPointDivByXSquared, friEvalPointDivByXSquared, PRIME) // f0 < 7P ( = 3 + 3 + 1). f0 := add(add(f0, f2), mulmod(friEvalPointDivByXSquared, add(f0, /*-fMinusX*/sub(MPRIME, f2)), PRIME)) } } { let f4 := mload(add(evaluationsOnCosetPtr, 0x80)) { let friEvalPointDivByX2 := mulmod(friEvalPointDivByX, mload(add(friHalfInvGroupPtr, 0x40)), PRIME) { let f5 := mload(add(evaluationsOnCosetPtr, 0xa0)) // f4 < 3P ( = 1 + 1 + 1). f4 := add(add(f4, f5), mulmod(friEvalPointDivByX2, add(f4, /*-fMinusX*/sub(PRIME, f5)), PRIME)) } let f6 := mload(add(evaluationsOnCosetPtr, 0xc0)) { let f7 := mload(add(evaluationsOnCosetPtr, 0xe0)) // f6 < 3P ( = 1 + 1 + 1). f6 := add(add(f6, f7), mulmod(add(f6, /*-fMinusX*/sub(PRIME, f7)), // friEvalPointDivByX2 * imaginaryUnit == // friEvalPointDivByX * mload(add(friHalfInvGroupPtr, 0x60)). mulmod(friEvalPointDivByX2, imaginaryUnit, PRIME), PRIME)) } // f4 < 7P ( = 3 + 3 + 1). f4 := add(add(f4, f6), mulmod(mulmod(friEvalPointDivByX2, friEvalPointDivByX2, PRIME), add(f4, /*-fMinusX*/sub(MPRIME, f6)), PRIME)) } // f0 < 15P ( = 7 + 7 + 1). f0 := add(add(f0, f4), mulmod(friEvalPointDivByXTessed, add(f0, /*-fMinusX*/sub(MPRIME, f4)), PRIME)) } { let f8 := mload(add(evaluationsOnCosetPtr, 0x100)) { let friEvalPointDivByX4 := mulmod(friEvalPointDivByX, mload(add(friHalfInvGroupPtr, 0x80)), PRIME) { let f9 := mload(add(evaluationsOnCosetPtr, 0x120)) // f8 < 3P ( = 1 + 1 + 1). f8 := add(add(f8, f9), mulmod(friEvalPointDivByX4, add(f8, /*-fMinusX*/sub(PRIME, f9)), PRIME)) } let f10 := mload(add(evaluationsOnCosetPtr, 0x140)) { let f11 := mload(add(evaluationsOnCosetPtr, 0x160)) // f10 < 3P ( = 1 + 1 + 1). f10 := add(add(f10, f11), mulmod(add(f10, /*-fMinusX*/sub(PRIME, f11)), // friEvalPointDivByX4 * imaginaryUnit == // friEvalPointDivByX * mload(add(friHalfInvGroupPtr, 0xa0)). mulmod(friEvalPointDivByX4, imaginaryUnit, PRIME), PRIME)) } // f8 < 7P ( = 3 + 3 + 1). f8 := add(add(f8, f10), mulmod(mulmod(friEvalPointDivByX4, friEvalPointDivByX4, PRIME), add(f8, /*-fMinusX*/sub(MPRIME, f10)), PRIME)) } { let f12 := mload(add(evaluationsOnCosetPtr, 0x180)) { let friEvalPointDivByX6 := mulmod(friEvalPointDivByX, mload(add(friHalfInvGroupPtr, 0xc0)), PRIME) { let f13 := mload(add(evaluationsOnCosetPtr, 0x1a0)) // f12 < 3P ( = 1 + 1 + 1). f12 := add(add(f12, f13), mulmod(friEvalPointDivByX6, add(f12, /*-fMinusX*/sub(PRIME, f13)), PRIME)) } let f14 := mload(add(evaluationsOnCosetPtr, 0x1c0)) { let f15 := mload(add(evaluationsOnCosetPtr, 0x1e0)) // f14 < 3P ( = 1 + 1 + 1). f14 := add(add(f14, f15), mulmod(add(f14, /*-fMinusX*/sub(PRIME, f15)), // friEvalPointDivByX6 * imaginaryUnit == // friEvalPointDivByX * mload(add(friHalfInvGroupPtr, 0xe0)). mulmod(friEvalPointDivByX6, imaginaryUnit, PRIME), PRIME)) } // f12 < 7P ( = 3 + 3 + 1). f12 := add(add(f12, f14), mulmod(mulmod(friEvalPointDivByX6, friEvalPointDivByX6, PRIME), add(f12, /*-fMinusX*/sub(MPRIME, f14)), PRIME)) } // f8 < 15P ( = 7 + 7 + 1). f8 := add(add(f8, f12), mulmod(mulmod(friEvalPointDivByXTessed, imaginaryUnit, PRIME), add(f8, /*-fMinusX*/sub(MPRIME, f12)), PRIME)) } // f0, f8 < 15P -> f0 + f8 < 30P && 16P < f0 + (MPRIME - f8) < 31P. nextLayerValue := addmod(add(f0, f8), mulmod(mulmod(friEvalPointDivByXTessed, friEvalPointDivByXTessed, PRIME), add(f0, /*-fMinusX*/sub(MPRIME, f8)), PRIME), PRIME) } { let xInv2 := mulmod(cosetOffset_, cosetOffset_, PRIME) let xInv4 := mulmod(xInv2, xInv2, PRIME) let xInv8 := mulmod(xInv4, xInv4, PRIME) nextXInv := mulmod(xInv8, xInv8, PRIME) } } } /* Gathers the "cosetSize" elements that belong to the same coset as the item at the top of the FRI queue and stores them in ctx[MM_FRI_STEP_VALUES:]. Returns friQueueHead - friQueueHead_ + 0x60 * (# elements that were taken from the queue). cosetIdx - the start index of the coset that was gathered. cosetOffset_ - the xInv field element that corresponds to cosetIdx. */ function gatherCosetInputs( uint256 channelPtr, uint256 friCtx, uint256 friQueueHead_, uint256 cosetSize) internal pure returns (uint256 friQueueHead, uint256 cosetIdx, uint256 cosetOffset_) { uint256 evaluationsOnCosetPtr = friCtx + FRI_CTX_TO_COSET_EVALUATIONS_OFFSET; uint256 friGroupPtr = friCtx + FRI_CTX_TO_FRI_GROUP_OFFSET; friQueueHead = friQueueHead_; assembly { let queueItemIdx := mload(friQueueHead) // The coset index is represented by the most significant bits of the queue item index. cosetIdx := and(queueItemIdx, not(sub(cosetSize, 1))) let nextCosetIdx := add(cosetIdx, cosetSize) let PRIME := 0x800000000000011000000000000000000000000000000000000000000000001 // Get the algebraic coset offset: // I.e. given c*g^(-k) compute c, where // g is the generator of the coset group. // k is bitReverse(offsetWithinCoset, log2(cosetSize)). // // To do this we multiply the algebraic coset offset at the top of the queue (c*g^(-k)) // by the group element that corresponds to the index inside the coset (g^k). cosetOffset_ := mulmod( /*(c*g^(-k)*/ mload(add(friQueueHead, 0x40)), /*(g^k)*/ mload(add(friGroupPtr, mul(/*offsetWithinCoset*/sub(queueItemIdx, cosetIdx), 0x20))), PRIME) let proofPtr := mload(channelPtr) for { let index := cosetIdx } lt(index, nextCosetIdx) { index := add(index, 1) } { // Inline channel operation: // Assume we are going to read the next element from the proof. // If this is not the case add(proofPtr, 0x20) will be reverted. let fieldElementPtr := proofPtr proofPtr := add(proofPtr, 0x20) // Load the next index from the queue and check if it is our sibling. if eq(index, queueItemIdx) { // Take element from the queue rather than from the proof // and convert it back to Montgomery form for Merkle verification. fieldElementPtr := add(friQueueHead, 0x20) // Revert the read from proof. proofPtr := sub(proofPtr, 0x20) // Reading the next index here is safe due to the // delimiter after the queries. friQueueHead := add(friQueueHead, 0x60) queueItemIdx := mload(friQueueHead) } // Note that we apply the modulo operation to convert the field elements we read // from the proof to canonical representation (in the range [0, PRIME - 1]). mstore(evaluationsOnCosetPtr, mod(mload(fieldElementPtr), PRIME)) evaluationsOnCosetPtr := add(evaluationsOnCosetPtr, 0x20) } mstore(channelPtr, proofPtr) } } /* Returns the bit reversal of num assuming it has the given number of bits. For example, if we have numberOfBits = 6 and num = (0b)1101 == (0b)001101, the function will return (0b)101100. */ function bitReverse(uint256 num, uint256 numberOfBits) internal pure returns(uint256 numReversed) { assert((numberOfBits == 256) || (num < 2 ** numberOfBits)); uint256 n = num; uint256 r = 0; for (uint256 k = 0; k < numberOfBits; k++) { r = (r * 2) | (n % 2); n = n / 2; } return r; } /* Initializes the FRI group and half inv group in the FRI context. */ function initFriGroups(uint256 friCtx) internal view { uint256 friGroupPtr = friCtx + FRI_CTX_TO_FRI_GROUP_OFFSET; uint256 friHalfInvGroupPtr = friCtx + FRI_CTX_TO_FRI_HALF_INV_GROUP_OFFSET; // FRI_GROUP_GEN is the coset generator. // Raising it to the (MAX_COSET_SIZE - 1) power gives us the inverse. uint256 genFriGroup = FRI_GROUP_GEN; uint256 genFriGroupInv = fpow(genFriGroup, (MAX_COSET_SIZE - 1)); uint256 lastVal = ONE_VAL; uint256 lastValInv = ONE_VAL; uint256 prime = PrimeFieldElement0.K_MODULUS; assembly { // ctx[mmHalfFriInvGroup + 0] = ONE_VAL; mstore(friHalfInvGroupPtr, lastValInv) // ctx[mmFriGroup + 0] = ONE_VAL; mstore(friGroupPtr, lastVal) // ctx[mmFriGroup + 1] = fsub(0, ONE_VAL); mstore(add(friGroupPtr, 0x20), sub(prime, lastVal)) } // To compute [1, -1 (== g^n/2), g^n/4, -g^n/4, ...] // we compute half the elements and derive the rest using negation. uint256 halfCosetSize = MAX_COSET_SIZE / 2; for (uint256 i = 1; i < halfCosetSize; i++) { lastVal = fmul(lastVal, genFriGroup); lastValInv = fmul(lastValInv, genFriGroupInv); uint256 idx = bitReverse(i, FRI_MAX_FRI_STEP-1); assembly { // ctx[mmHalfFriInvGroup + idx] = lastValInv; mstore(add(friHalfInvGroupPtr, mul(idx, 0x20)), lastValInv) // ctx[mmFriGroup + 2*idx] = lastVal; mstore(add(friGroupPtr, mul(idx, 0x40)), lastVal) // ctx[mmFriGroup + 2*idx + 1] = fsub(0, lastVal); mstore(add(friGroupPtr, add(mul(idx, 0x40), 0x20)), sub(prime, lastVal)) } } } /* Operates on the coset of size friFoldedCosetSize that start at index. It produces 3 outputs: 1. The field elements that result from doing FRI reductions on the coset. 2. The pointInv elements for the location that corresponds to the first output. 3. The root of a Merkle tree for the input layer. The input is read either from the queue or from the proof depending on data availability. Since the function reads from the queue it returns an updated head pointer. */ function doFriSteps( uint256 friCtx, uint256 friQueueTail, uint256 cosetOffset_, uint256 friEvalPoint, uint256 friCosetSize, uint256 index, uint256 merkleQueuePtr) internal pure { uint256 friValue; uint256 evaluationsOnCosetPtr = friCtx + FRI_CTX_TO_COSET_EVALUATIONS_OFFSET; uint256 friHalfInvGroupPtr = friCtx + FRI_CTX_TO_FRI_HALF_INV_GROUP_OFFSET; // Compare to expected FRI step sizes in order of likelihood, step size 3 being most common. if (friCosetSize == 8) { (friValue, cosetOffset_) = do3FriSteps( friHalfInvGroupPtr, evaluationsOnCosetPtr, cosetOffset_, friEvalPoint); } else if (friCosetSize == 4) { (friValue, cosetOffset_) = do2FriSteps( friHalfInvGroupPtr, evaluationsOnCosetPtr, cosetOffset_, friEvalPoint); } else if (friCosetSize == 16) { (friValue, cosetOffset_) = do4FriSteps( friHalfInvGroupPtr, evaluationsOnCosetPtr, cosetOffset_, friEvalPoint); } else { require(false, "Only step sizes of 2, 3 or 4 are supported."); } uint256 lhashMask = getHashMask(); assembly { let indexInNextStep := div(index, friCosetSize) mstore(merkleQueuePtr, indexInNextStep) mstore(add(merkleQueuePtr, 0x20), and(lhashMask, keccak256(evaluationsOnCosetPtr, mul(0x20,friCosetSize)))) mstore(friQueueTail, indexInNextStep) mstore(add(friQueueTail, 0x20), friValue) mstore(add(friQueueTail, 0x40), cosetOffset_) } } /* Computes the FRI step with eta = log2(friCosetSize) for all the live queries. The input and output data is given in array of triplets: (query index, FRI value, FRI inversed point) in the address friQueuePtr (which is &ctx[mmFriQueue:]). The function returns the number of live queries remaining after computing the FRI step. The number of live queries decreases whenever multiple query points in the same coset are reduced to a single query in the next FRI layer. As the function computes the next layer it also collects that data from the previous layer for Merkle verification. */ function computeNextLayer( uint256 channelPtr, uint256 friQueuePtr, uint256 merkleQueuePtr, uint256 nQueries, uint256 friEvalPoint, uint256 friCosetSize, uint256 friCtx) internal pure returns (uint256 nLiveQueries) { uint256 merkleQueueTail = merkleQueuePtr; uint256 friQueueHead = friQueuePtr; uint256 friQueueTail = friQueuePtr; uint256 friQueueEnd = friQueueHead + (0x60 * nQueries); do { uint256 cosetOffset; uint256 index; (friQueueHead, index, cosetOffset) = gatherCosetInputs( channelPtr, friCtx, friQueueHead, friCosetSize); doFriSteps( friCtx, friQueueTail, cosetOffset, friEvalPoint, friCosetSize, index, merkleQueueTail); merkleQueueTail += 0x40; friQueueTail += 0x60; } while (friQueueHead < friQueueEnd); return (friQueueTail - friQueuePtr) / 0x60; } } contract FriStatementContract is FriLayer, FactRegistry { /* Compute a single FRI layer of size friStepSize at evaluationPoint starting from input friQueue, and the extra witnesses in the "proof" channel. Also check that the input and witnesses belong to a Merkle tree with root expectedRoot, again using witnesses from "proof". After verification, register the FRI fact hash, which is: keccak256( evaluationPoint, friStepSize, keccak256(friQueue_input), keccak256(friQueue_output), // The FRI queue after proccessing the FRI layer expectedRoot ) Note that this function is used as external, but declared public to avoid copying the arrays. */ function verifyFRI( uint256[] memory proof, uint256[] memory friQueue, uint256 evaluationPoint, uint256 friStepSize, uint256 expectedRoot) public { require (friStepSize <= FRI_MAX_FRI_STEP, "FRI step size too large"); /* The friQueue should have of 3*nQueries + 1 elements, beginning with nQueries triplets of the form (query_index, FRI_value, FRI_inverse_point), and ending with a single buffer cell set to 0, which is accessed and read during the computation of the FRI layer. */ require ( friQueue.length % 3 == 1, "FRI Queue must be composed of triplets plus one delimiter cell"); require (friQueue.length >= 4, "No query to process"); uint256 mmFriCtxSize = FRI_CTX_SIZE; uint256 nQueries = friQueue.length / 3; friQueue[3*nQueries] = 0; // NOLINT: divide-before-multiply. uint256 merkleQueuePtr; uint256 friQueuePtr; uint256 channelPtr; uint256 friCtx; uint256 dataToHash; // Verify evaluation point within valid range. require(evaluationPoint < K_MODULUS, "INVALID_EVAL_POINT"); // Queries need to be in the range [2**height .. 2**(height+1)-1] strictly incrementing. // i.e. we need to check that Qi+1 > Qi for each i, // but regarding the height range - it's sufficient to check that // (Q1 ^ Qn) < Q1 Which affirms that all queries are within the same logarithmic step. // Verify FRI values and inverses are within valid range. // and verify that queries are strictly incrementing. uint256 prevQuery = 0; // If we pass height, change to: prevQuery = 1 << height - 1; for (uint256 i = 0; i < nQueries; i++) { require(friQueue[3*i] > prevQuery, "INVALID_QUERY_VALUE"); require(friQueue[3*i+1] < K_MODULUS, "INVALID_FRI_VALUE"); require(friQueue[3*i+2] < K_MODULUS, "INVALID_FRI_INVERSE_POINT"); prevQuery = friQueue[3*i]; } // Verify all queries are on the same logarithmic step. // NOLINTNEXTLINE: divide-before-multiply. require((friQueue[0] ^ friQueue[3*nQueries-3]) < friQueue[0], "INVALID_QUERIES_RANGE"); // Allocate memory queues: channelPtr, merkleQueue, friCtx, dataToHash. assembly { friQueuePtr := add(friQueue, 0x20) channelPtr := mload(0x40) // Free pointer location. mstore(channelPtr, add(proof, 0x20)) merkleQueuePtr := add(channelPtr, 0x20) friCtx := add(merkleQueuePtr, mul(0x40, nQueries)) dataToHash := add(friCtx, mmFriCtxSize) mstore(0x40, add(dataToHash, 0xa0)) // Advance free pointer. mstore(dataToHash, evaluationPoint) mstore(add(dataToHash, 0x20), friStepSize) mstore(add(dataToHash, 0x80), expectedRoot) // Hash FRI inputs and add to dataToHash. mstore(add(dataToHash, 0x40), keccak256(friQueuePtr, mul(0x60, nQueries))) } initFriGroups(friCtx); nQueries = computeNextLayer( channelPtr, friQueuePtr, merkleQueuePtr, nQueries, evaluationPoint, 2**friStepSize, /* friCosetSize = 2**friStepSize */ friCtx); verify(channelPtr, merkleQueuePtr, bytes32(expectedRoot), nQueries); bytes32 factHash; assembly { // Hash FRI outputs and add to dataToHash. mstore(add(dataToHash, 0x60), keccak256(friQueuePtr, mul(0x60, nQueries))) factHash := keccak256(dataToHash, 0xa0) } registerFact(factHash); } } contract HornerEvaluator is PrimeFieldElement0 { /* Computes the evaluation of a polynomial f(x) = sum(a_i * x^i) on the given point. The coefficients of the polynomial are given in a_0 = coefsStart[0], ..., a_{n-1} = coefsStart[n - 1] where n = nCoefs = friLastLayerDegBound. Note that coefsStart is not actually an array but a direct pointer. The function requires that n is divisible by 8. */ function hornerEval(uint256 coefsStart, uint256 point, uint256 nCoefs) internal pure returns (uint256) { uint256 result = 0; uint256 prime = PrimeFieldElement0.K_MODULUS; require(nCoefs % 8 == 0, "Number of polynomial coefficients must be divisible by 8"); require(nCoefs < 4096, "No more than 4096 coefficients are supported"); assembly { let coefsPtr := add(coefsStart, mul(nCoefs, 0x20)) for { } gt(coefsPtr, coefsStart) { } { // Reduce coefsPtr by 8 field elements. coefsPtr := sub(coefsPtr, 0x100) // Apply 4 Horner steps (result := result * point + coef). result := add(mload(add(coefsPtr, 0x80)), mulmod( add(mload(add(coefsPtr, 0xa0)), mulmod( add(mload(add(coefsPtr, 0xc0)), mulmod( add(mload(add(coefsPtr, 0xe0)), mulmod( result, point, prime)), point, prime)), point, prime)), point, prime)) // Apply 4 additional Horner steps. result := add(mload(coefsPtr), mulmod( add(mload(add(coefsPtr, 0x20)), mulmod( add(mload(add(coefsPtr, 0x40)), mulmod( add(mload(add(coefsPtr, 0x60)), mulmod( result, point, prime)), point, prime)), point, prime)), point, prime)) } } // Since the last operation was "add" (instead of "addmod"), we need to take result % prime. return result % prime; } } contract MemoryAccessUtils is MemoryMap { function getPtr(uint256[] memory ctx, uint256 offset) internal pure returns (uint256) { uint256 ctxPtr; require(offset < MM_CONTEXT_SIZE, "Overflow protection failed"); assembly { ctxPtr := add(ctx, 0x20) } return ctxPtr + offset * 0x20; } function getProofPtr(uint256[] memory proof) internal pure returns (uint256) { uint256 proofPtr; assembly { proofPtr := proof } return proofPtr; } function getChannelPtr(uint256[] memory ctx) internal pure returns (uint256) { uint256 ctxPtr; assembly { ctxPtr := add(ctx, 0x20) } return ctxPtr + MM_CHANNEL * 0x20; } function getQueries(uint256[] memory ctx) internal pure returns (uint256[] memory) { uint256[] memory queries; // Dynamic array holds length followed by values. uint256 offset = 0x20 + 0x20*MM_N_UNIQUE_QUERIES; assembly { queries := add(ctx, offset) } return queries; } function getMerkleQueuePtr(uint256[] memory ctx) internal pure returns (uint256) { return getPtr(ctx, MM_MERKLE_QUEUE); } function getFriSteps(uint256[] memory ctx) internal pure returns (uint256[] memory friSteps) { uint256 friStepsPtr = getPtr(ctx, MM_FRI_STEPS_PTR); assembly { friSteps := mload(friStepsPtr) } } } contract MemoryPageFactRegistry is FactRegistry, MemoryPageFactRegistryConstants { event LogMemoryPageFact(bytes32 factHash, uint256 memoryHash, uint256 prod); /* Registers a fact based of the given memory (address, value) pairs (REGULAR_PAGE). */ function registerRegularMemoryPage( uint256[] calldata memoryPairs, uint256 z, uint256 alpha, uint256 prime) external returns (bytes32 factHash, uint256 memoryHash, uint256 prod) { require(memoryPairs.length < 2**20, "Too many memory values."); require(memoryPairs.length % 2 == 0, "Size of memoryPairs must be even."); require(z < prime, "Invalid value of z."); require(alpha < prime, "Invalid value of alpha."); (factHash, memoryHash, prod) = computeFactHash(memoryPairs, z, alpha, prime); emit LogMemoryPageFact(factHash, memoryHash, prod); registerFact(factHash); } function computeFactHash( uint256[] memory memoryPairs, uint256 z, uint256 alpha, uint256 prime) internal pure returns (bytes32 factHash, uint256 memoryHash, uint256 prod) { uint256 memorySize = memoryPairs.length / 2; prod = 1; assembly { let memoryPtr := add(memoryPairs, 0x20) // Each value of memoryPairs is a pair: (address, value). let lastPtr := add(memoryPtr, mul(memorySize, 0x40)) for { let ptr := memoryPtr } lt(ptr, lastPtr) { ptr := add(ptr, 0x40) } { // Compute address + alpha * value. let address_value_lin_comb := addmod( /*address*/ mload(ptr), mulmod(/*value*/ mload(add(ptr, 0x20)), alpha, prime), prime) prod := mulmod(prod, add(z, sub(prime, address_value_lin_comb)), prime) } memoryHash := keccak256(memoryPtr, mul(/*0x20 * 2*/ 0x40, memorySize)) } factHash = keccak256( abi.encodePacked( REGULAR_PAGE, prime, memorySize, z, alpha, prod, memoryHash, uint256(0)) ); } /* Registers a fact based on the given values, assuming continuous addresses. values should be [value at startAddr, value at (startAddr + 1), ...]. */ function registerContinuousMemoryPage( // NOLINT: external-function. uint256 startAddr, uint256[] memory values, uint256 z, uint256 alpha, uint256 prime) public returns (bytes32 factHash, uint256 memoryHash, uint256 prod) { require(values.length < 2**20, "Too many memory values."); require(prime < 2**254, "prime is too big for the optimizations in this function."); require(z < prime, "Invalid value of z."); require(alpha < prime, "Invalid value of alpha."); require(startAddr < 2**64 && startAddr < prime, "Invalid value of startAddr."); uint256 nValues = values.length; assembly { // Initialize prod to 1. prod := 1 // Initialize valuesPtr to point to the first value in the array. let valuesPtr := add(values, 0x20) let minus_z := mod(sub(prime, z), prime) // Start by processing full batches of 8 cells, addr represents the last address in each // batch. let addr := add(startAddr, 7) let lastAddr := add(startAddr, nValues) for {} lt(addr, lastAddr) { addr := add(addr, 8) } { // Compute the product of (lin_comb - z) instead of (z - lin_comb), since we're // doing an even number of iterations, the result is the same. prod := mulmod(prod, mulmod(add(add(sub(addr, 7), mulmod( mload(valuesPtr), alpha, prime)), minus_z), add(add(sub(addr, 6), mulmod( mload(add(valuesPtr, 0x20)), alpha, prime)), minus_z), prime), prime) prod := mulmod(prod, mulmod(add(add(sub(addr, 5), mulmod( mload(add(valuesPtr, 0x40)), alpha, prime)), minus_z), add(add(sub(addr, 4), mulmod( mload(add(valuesPtr, 0x60)), alpha, prime)), minus_z), prime), prime) prod := mulmod(prod, mulmod(add(add(sub(addr, 3), mulmod( mload(add(valuesPtr, 0x80)), alpha, prime)), minus_z), add(add(sub(addr, 2), mulmod( mload(add(valuesPtr, 0xa0)), alpha, prime)), minus_z), prime), prime) prod := mulmod(prod, mulmod(add(add(sub(addr, 1), mulmod( mload(add(valuesPtr, 0xc0)), alpha, prime)), minus_z), add(add(addr, mulmod( mload(add(valuesPtr, 0xe0)), alpha, prime)), minus_z), prime), prime) valuesPtr := add(valuesPtr, 0x100) } // Handle leftover. // Translate addr to the beginning of the last incomplete batch. addr := sub(addr, 7) for {} lt(addr, lastAddr) { addr := add(addr, 1) } { let address_value_lin_comb := addmod( addr, mulmod(mload(valuesPtr), alpha, prime), prime) prod := mulmod(prod, add(z, sub(prime, address_value_lin_comb)), prime) valuesPtr := add(valuesPtr, 0x20) } memoryHash := keccak256(add(values, 0x20), mul(0x20, nValues)) } factHash = keccak256( abi.encodePacked( CONTINUOUS_PAGE, prime, nValues, z, alpha, prod, memoryHash, startAddr) ); emit LogMemoryPageFact(factHash, memoryHash, prod); registerFact(factHash); } } contract MerkleStatementContract is MerkleVerifier, FactRegistry { /* This function recieves an initial merkle queue (consists of indices of leaves in the merkle in addition to their values) and a merkle view (contains the values of all the nodes required to be able to validate the queue). In case of success it registers the Merkle fact, which is the hash of the queue together with the resulting root. */ // NOLINTNEXTLINE: external-function. function verifyMerkle( uint256[] memory merkleView, uint256[] memory initialMerkleQueue, uint256 height, uint256 expectedRoot ) public { require(height < 200, "Height must be < 200."); require( initialMerkleQueue.length <= MAX_N_MERKLE_VERIFIER_QUERIES * 2, "TOO_MANY_MERKLE_QUERIES"); uint256 merkleQueuePtr; uint256 channelPtr; uint256 nQueries; uint256 dataToHashPtr; uint256 badInput = 0; assembly { // Skip 0x20 bytes length at the beginning of the merkleView. let merkleViewPtr := add(merkleView, 0x20) // Let channelPtr point to a free space. channelPtr := mload(0x40) // freePtr. // channelPtr will point to the merkleViewPtr since the 'verify' function expects // a pointer to the proofPtr. mstore(channelPtr, merkleViewPtr) // Skip 0x20 bytes length at the beginning of the initialMerkleQueue. merkleQueuePtr := add(initialMerkleQueue, 0x20) // Get number of queries. nQueries := div(mload(initialMerkleQueue), 0x2) // Get a pointer to the end of initialMerkleQueue. let initialMerkleQueueEndPtr := add(merkleQueuePtr, mul(nQueries, 0x40)) // Let dataToHashPtr point to a free memory. dataToHashPtr := add(channelPtr, 0x20) // Next freePtr. // Copy initialMerkleQueue to dataToHashPtr and validaite the indices. // The indices need to be in the range [2**height..2*(height+1)-1] and // strictly incrementing. // First index needs to be >= 2**height. let idxLowerLimit := shl(height, 1) for { } lt(merkleQueuePtr, initialMerkleQueueEndPtr) { } { let curIdx := mload(merkleQueuePtr) // badInput |= curIdx < IdxLowerLimit. badInput := or(badInput, lt(curIdx, idxLowerLimit)) // The next idx must be at least curIdx + 1. idxLowerLimit := add(curIdx, 1) // Copy the pair (idx, hash) to the dataToHash array. mstore(dataToHashPtr, curIdx) mstore(add(dataToHashPtr, 0x20), mload(add(merkleQueuePtr, 0x20))) dataToHashPtr := add(dataToHashPtr, 0x40) merkleQueuePtr := add(merkleQueuePtr, 0x40) } // We need to enforce that lastIdx < 2**(height+1) // => fail if lastIdx >= 2**(height+1) // => fail if (lastIdx + 1) > 2**(height+1) // => fail if idxLowerLimit > 2**(height+1). badInput := or(badInput, gt(idxLowerLimit, shl(height, 2))) // Reset merkleQueuePtr. merkleQueuePtr := add(initialMerkleQueue, 0x20) // Let freePtr point to a free memory (one word after the copied queries - reserved // for the root). mstore(0x40, add(dataToHashPtr, 0x20)) } require(badInput == 0, "INVALID_MERKLE_INDICES"); bytes32 resRoot = verify(channelPtr, merkleQueuePtr, bytes32(expectedRoot), nQueries); bytes32 factHash; assembly { // Append the resulted root (should be the return value of verify) to dataToHashPtr. mstore(dataToHashPtr, resRoot) // Reset dataToHashPtr. dataToHashPtr := add(channelPtr, 0x20) factHash := keccak256(dataToHashPtr, add(mul(nQueries, 0x40), 0x20)) } registerFact(factHash); } } contract Fri is MemoryMap, MemoryAccessUtils, HornerEvaluator, FriLayer { event LogGas(string name, uint256 val); function verifyLastLayer(uint256[] memory ctx, uint256 nPoints) internal view { uint256 friLastLayerDegBound = ctx[MM_FRI_LAST_LAYER_DEG_BOUND]; uint256 groupOrderMinusOne = friLastLayerDegBound * ctx[MM_BLOW_UP_FACTOR] - 1; uint256 coefsStart = ctx[MM_FRI_LAST_LAYER_PTR]; for (uint256 i = 0; i < nPoints; i++) { uint256 point = ctx[MM_FRI_QUEUE + 3*i + 2]; // Invert point using inverse(point) == fpow(point, ord(point) - 1). point = fpow(point, groupOrderMinusOne); require( hornerEval(coefsStart, point, friLastLayerDegBound) == ctx[MM_FRI_QUEUE + 3*i + 1], "Bad Last layer value."); } } /* Verifies FRI layers. Upon entry and every time we pass through the "if (index < layerSize)" condition, ctx[mmFriQueue:] holds an array of triplets (query index, FRI value, FRI inversed point), i.e. ctx[mmFriQueue::3] holds query indices. ctx[mmFriQueue + 1::3] holds the input for the next layer. ctx[mmFriQueue + 2::3] holds the inverses of the evaluation points: ctx[mmFriQueue + 3*i + 2] = inverse( fpow(layerGenerator, bitReverse(ctx[mmFriQueue + 3*i], logLayerSize)). */ function friVerifyLayers( uint256[] memory ctx) internal view { uint256 friCtx = getPtr(ctx, MM_FRI_CTX); require( MAX_SUPPORTED_MAX_FRI_STEP == FRI_MAX_FRI_STEP, "Incosistent MAX_FRI_STEP between MemoryMap.sol and FriLayer.sol"); initFriGroups(friCtx); // emit LogGas("FRI offset precomputation", gasleft()); uint256 channelPtr = getChannelPtr(ctx); uint256 merkleQueuePtr = getMerkleQueuePtr(ctx); uint256 friStep = 1; uint256 nLiveQueries = ctx[MM_N_UNIQUE_QUERIES]; // Add 0 at the end of the queries array to avoid empty array check in readNextElment. ctx[MM_FRI_QUERIES_DELIMITER] = 0; // Rather than converting all the values from Montgomery to standard form, // we can just pretend that the values are in standard form but all // the committed polynomials are multiplied by MontgomeryR. // // The values in the proof are already multiplied by MontgomeryR, // but the inputs from the OODS oracle need to be fixed. for (uint256 i = 0; i < nLiveQueries; i++ ) { ctx[MM_FRI_QUEUE + 3*i + 1] = fmul(ctx[MM_FRI_QUEUE + 3*i + 1], K_MONTGOMERY_R); } uint256 friQueue = getPtr(ctx, MM_FRI_QUEUE); uint256[] memory friSteps = getFriSteps(ctx); uint256 nFriSteps = friSteps.length; while (friStep < nFriSteps) { uint256 friCosetSize = 2**friSteps[friStep]; nLiveQueries = computeNextLayer( channelPtr, friQueue, merkleQueuePtr, nLiveQueries, ctx[MM_FRI_EVAL_POINTS + friStep], friCosetSize, friCtx); // emit LogGas( // string(abi.encodePacked("FRI layer ", bytes1(uint8(48 + friStep)))), gasleft()); // Layer is done, verify the current layer and move to next layer. // ctx[mmMerkleQueue: merkleQueueIdx) holds the indices // and values of the merkle leaves that need verification. verify( channelPtr, merkleQueuePtr, bytes32(ctx[MM_FRI_COMMITMENTS + friStep - 1]), nLiveQueries); // emit LogGas( // string(abi.encodePacked("Merkle of FRI layer ", bytes1(uint8(48 + friStep)))), // gasleft()); friStep++; } verifyLastLayer(ctx, nLiveQueries); // emit LogGas("last FRI layer", gasleft()); } } contract FriStatementVerifier is MemoryMap, MemoryAccessUtils, VerifierChannel, HornerEvaluator { event LogGas(string name, uint256 val); FriStatementContract friStatementContract; constructor(address friStatementContractAddress) internal { friStatementContract = FriStatementContract(friStatementContractAddress); } /* Fast-forwards the queries and invPoints of the friQueue from before the first layer to after the last layer, computes the last FRI layer using horner evalations, then returns the hash of the final FriQueue. */ function computerLastLayerHash(uint256[] memory ctx, uint256 nPoints, uint256 numLayers) internal view returns (bytes32 lastLayerHash) { uint256 friLastLayerDegBound = ctx[MM_FRI_LAST_LAYER_DEG_BOUND]; uint256 groupOrderMinusOne = friLastLayerDegBound * ctx[MM_BLOW_UP_FACTOR] - 1; uint256 exponent = 1 << numLayers; uint256 curPointIndex = 0; uint256 prevQuery = 0; uint256 coefsStart = ctx[MM_FRI_LAST_LAYER_PTR]; for (uint256 i = 0; i < nPoints; i++) { uint256 query = ctx[MM_FRI_QUEUE + 3*i] >> numLayers; if (query == prevQuery) { continue; } ctx[MM_FRI_QUEUE + 3*curPointIndex] = query; prevQuery = query; uint256 point = fpow(ctx[MM_FRI_QUEUE + 3*i + 2], exponent); ctx[MM_FRI_QUEUE + 3*curPointIndex + 2] = point; // Invert point using inverse(point) == fpow(point, ord(point) - 1). point = fpow(point, groupOrderMinusOne); ctx[MM_FRI_QUEUE + 3*curPointIndex + 1] = hornerEval( coefsStart, point, friLastLayerDegBound); curPointIndex++; } uint256 friQueue = getPtr(ctx, MM_FRI_QUEUE); assembly { lastLayerHash := keccak256(friQueue, mul(curPointIndex, 0x60)) } } /* Verifies that FRI layers consistent with the computed first and last FRI layers have been registered in the FriStatementContract. */ function friVerifyLayers( uint256[] memory ctx) internal view { uint256 channelPtr = getChannelPtr(ctx); uint256 nQueries = ctx[MM_N_UNIQUE_QUERIES]; // Rather than converting all the values from Montgomery to standard form, // we can just pretend that the values are in standard form but all // the committed polynomials are multiplied by MontgomeryR. // // The values in the proof are already multiplied by MontgomeryR, // but the inputs from the OODS oracle need to be fixed. for (uint256 i = 0; i < nQueries; i++ ) { ctx[MM_FRI_QUEUE + 3*i + 1] = fmul(ctx[MM_FRI_QUEUE + 3*i + 1], K_MONTGOMERY_R); } uint256 friQueue = getPtr(ctx, MM_FRI_QUEUE); uint256 inputLayerHash; assembly { inputLayerHash := keccak256(friQueue, mul(nQueries, 0x60)) } uint256[] memory friSteps = getFriSteps(ctx); uint256 nFriStepsLessOne = friSteps.length - 1; uint256 friStep = 1; uint256 sumSteps = friSteps[1]; uint256[5] memory dataToHash; while (friStep < nFriStepsLessOne) { uint256 outputLayerHash = uint256(readBytes(channelPtr, true)); dataToHash[0] = ctx[MM_FRI_EVAL_POINTS + friStep]; dataToHash[1] = friSteps[friStep]; dataToHash[2] = inputLayerHash; dataToHash[3] = outputLayerHash; dataToHash[4] = ctx[MM_FRI_COMMITMENTS + friStep - 1]; // Verify statement is registered. require( // NOLINT: calls-loop. friStatementContract.isValid(keccak256(abi.encodePacked(dataToHash))), "INVALIDATED_FRI_STATEMENT"); inputLayerHash = outputLayerHash; friStep++; sumSteps += friSteps[friStep]; } dataToHash[0] = ctx[MM_FRI_EVAL_POINTS + friStep]; dataToHash[1] = friSteps[friStep]; dataToHash[2] = inputLayerHash; dataToHash[3] = uint256(computerLastLayerHash(ctx, nQueries, sumSteps)); dataToHash[4] = ctx[MM_FRI_COMMITMENTS + friStep - 1]; require( friStatementContract.isValid(keccak256(abi.encodePacked(dataToHash))), "INVALIDATED_FRI_STATEMENT"); } } contract StarkVerifier is MemoryMap, MemoryAccessUtils, VerifierChannel, IStarkVerifier, Fri { /* The work required to generate an invalid proof is 2^numSecurityBits. Typical values: 80-128. */ uint256 numSecurityBits; /* The secuirty of a proof is a composition of bits obtained by PoW and bits obtained by FRI queries. The verifier requires at least minProofOfWorkBits to be obtained by PoW. Typical values: 20-30. */ uint256 minProofOfWorkBits; constructor(uint256 numSecurityBits_, uint256 minProofOfWorkBits_) public { numSecurityBits = numSecurityBits_; minProofOfWorkBits = minProofOfWorkBits_; } /* To print LogDebug messages from assembly use code like the following: assembly { let val := 0x1234 mstore(0, val) // uint256 val // log to the LogDebug(uint256) topic log1(0, 0x20, 0x2feb477e5c8c82cfb95c787ed434e820b1a28fa84d68bbf5aba5367382f5581c) } Note that you can't use log in a contract that was called with staticcall (ContraintPoly, Oods,...) If logging is needed replace the staticcall to call and add a third argument of 0. */ event LogBool(bool val); event LogDebug(uint256 val); address oodsContractAddress; function airSpecificInit(uint256[] memory publicInput) internal view returns (uint256[] memory ctx, uint256 logTraceLength); uint256 constant internal PROOF_PARAMS_N_QUERIES_OFFSET = 0; uint256 constant internal PROOF_PARAMS_LOG_BLOWUP_FACTOR_OFFSET = 1; uint256 constant internal PROOF_PARAMS_PROOF_OF_WORK_BITS_OFFSET = 2; uint256 constant internal PROOF_PARAMS_FRI_LAST_LAYER_DEG_BOUND_OFFSET = 3; uint256 constant internal PROOF_PARAMS_N_FRI_STEPS_OFFSET = 4; uint256 constant internal PROOF_PARAMS_FRI_STEPS_OFFSET = 5; function validateFriParams( uint256[] memory friSteps, uint256 logTraceLength, uint256 logFriLastLayerDegBound) internal pure { require (friSteps[0] == 0, "Only eta0 == 0 is currently supported"); uint256 expectedLogDegBound = logFriLastLayerDegBound; uint256 nFriSteps = friSteps.length; for (uint256 i = 1; i < nFriSteps; i++) { uint256 friStep = friSteps[i]; require(friStep > 0, "Only the first fri step can be 0"); require(friStep <= 4, "Max supported fri step is 4."); expectedLogDegBound += friStep; } // FRI starts with a polynomial of degree 'traceLength'. // After applying all the FRI steps we expect to get a polynomial of degree less // than friLastLayerDegBound. require ( expectedLogDegBound == logTraceLength, "Fri params do not match trace length"); } function initVerifierParams(uint256[] memory publicInput, uint256[] memory proofParams) internal view returns (uint256[] memory ctx) { require (proofParams.length > PROOF_PARAMS_FRI_STEPS_OFFSET, "Invalid proofParams."); require ( proofParams.length == ( PROOF_PARAMS_FRI_STEPS_OFFSET + proofParams[PROOF_PARAMS_N_FRI_STEPS_OFFSET]), "Invalid proofParams."); uint256 logBlowupFactor = proofParams[PROOF_PARAMS_LOG_BLOWUP_FACTOR_OFFSET]; require (logBlowupFactor <= 16, "logBlowupFactor must be at most 16"); require (logBlowupFactor >= 1, "logBlowupFactor must be at least 1"); uint256 proofOfWorkBits = proofParams[PROOF_PARAMS_PROOF_OF_WORK_BITS_OFFSET]; require (proofOfWorkBits <= 50, "proofOfWorkBits must be at most 50"); require (proofOfWorkBits >= minProofOfWorkBits, "minimum proofOfWorkBits not satisfied"); require (proofOfWorkBits < numSecurityBits, "Proofs may not be purely based on PoW."); uint256 logFriLastLayerDegBound = ( proofParams[PROOF_PARAMS_FRI_LAST_LAYER_DEG_BOUND_OFFSET] ); require ( logFriLastLayerDegBound <= 10, "logFriLastLayerDegBound must be at most 10."); uint256 nFriSteps = proofParams[PROOF_PARAMS_N_FRI_STEPS_OFFSET]; require (nFriSteps <= 10, "Too many fri steps."); require (nFriSteps > 1, "Not enough fri steps."); uint256[] memory friSteps = new uint256[](nFriSteps); for (uint256 i = 0; i < nFriSteps; i++) { friSteps[i] = proofParams[PROOF_PARAMS_FRI_STEPS_OFFSET + i]; } uint256 logTraceLength; (ctx, logTraceLength) = airSpecificInit(publicInput); validateFriParams(friSteps, logTraceLength, logFriLastLayerDegBound); uint256 friStepsPtr = getPtr(ctx, MM_FRI_STEPS_PTR); assembly { mstore(friStepsPtr, friSteps) } ctx[MM_FRI_LAST_LAYER_DEG_BOUND] = 2**logFriLastLayerDegBound; ctx[MM_TRACE_LENGTH] = 2 ** logTraceLength; ctx[MM_BLOW_UP_FACTOR] = 2**logBlowupFactor; ctx[MM_PROOF_OF_WORK_BITS] = proofOfWorkBits; uint256 nQueries = proofParams[PROOF_PARAMS_N_QUERIES_OFFSET]; require (nQueries > 0, "Number of queries must be at least one"); require (nQueries <= MAX_N_QUERIES, "Too many queries."); require ( nQueries * logBlowupFactor + proofOfWorkBits >= numSecurityBits, "Proof params do not satisfy security requirements."); ctx[MM_N_UNIQUE_QUERIES] = nQueries; // We start with log_evalDomainSize = logTraceSize and update it here. ctx[MM_LOG_EVAL_DOMAIN_SIZE] = logTraceLength + logBlowupFactor; ctx[MM_EVAL_DOMAIN_SIZE] = 2**ctx[MM_LOG_EVAL_DOMAIN_SIZE]; uint256 gen_evalDomain = fpow(GENERATOR_VAL, (K_MODULUS - 1) / ctx[MM_EVAL_DOMAIN_SIZE]); ctx[MM_EVAL_DOMAIN_GENERATOR] = gen_evalDomain; uint256 genTraceDomain = fpow(gen_evalDomain, ctx[MM_BLOW_UP_FACTOR]); ctx[MM_TRACE_GENERATOR] = genTraceDomain; } function getPublicInputHash(uint256[] memory publicInput) internal pure returns (bytes32); function oodsConsistencyCheck(uint256[] memory ctx) internal view; function getNColumnsInTrace() internal pure returns(uint256); function getNColumnsInComposition() internal pure returns(uint256); function getMmCoefficients() internal pure returns(uint256); function getMmOodsValues() internal pure returns(uint256); function getMmOodsCoefficients() internal pure returns(uint256); function getNCoefficients() internal pure returns(uint256); function getNOodsValues() internal pure returns(uint256); function getNOodsCoefficients() internal pure returns(uint256); // Interaction functions. // If the AIR uses interaction, the following functions should be overridden. function getNColumnsInTrace0() internal pure returns(uint256) { return getNColumnsInTrace(); } function getNColumnsInTrace1() internal pure returns(uint256) { return 0; } function getMmInteractionElements() internal pure returns(uint256) { require(false, "AIR does not support interaction."); } function getNInteractionElements() internal pure returns(uint256) { require(false, "AIR does not support interaction."); } function hasInteraction() internal pure returns (bool) { return getNColumnsInTrace1() > 0; } function hashRow(uint256[] memory ctx, uint256 offset, uint256 length) internal pure returns (uint256 res) { assembly { res := keccak256(add(add(ctx, 0x20), offset), length) } res &= getHashMask(); } /* Adjusts the query indices and generates evaluation points for each query index. The operations above are independent but we can save gas by combining them as both operations require us to iterate the queries array. Indices adjustment: The query indices adjustment is needed because both the Merkle verification and FRI expect queries "full binary tree in array" indices. The adjustment is simply adding evalDomainSize to each query. Note that evalDomainSize == 2^(#FRI layers) == 2^(Merkle tree hight). evalPoints generation: for each query index "idx" we compute the corresponding evaluation point: g^(bitReverse(idx, log_evalDomainSize). */ function adjustQueryIndicesAndPrepareEvalPoints(uint256[] memory ctx) internal view { uint256 nUniqueQueries = ctx[MM_N_UNIQUE_QUERIES]; uint256 friQueue = getPtr(ctx, MM_FRI_QUEUE); uint256 friQueueEnd = friQueue + nUniqueQueries * 0x60; uint256 evalPointsPtr = getPtr(ctx, MM_OODS_EVAL_POINTS); uint256 log_evalDomainSize = ctx[MM_LOG_EVAL_DOMAIN_SIZE]; uint256 evalDomainSize = ctx[MM_EVAL_DOMAIN_SIZE]; uint256 evalDomainGenerator = ctx[MM_EVAL_DOMAIN_GENERATOR]; assembly { /* Returns the bit reversal of value assuming it has the given number of bits. numberOfBits must be <= 64. */ function bitReverse(value, numberOfBits) -> res { // Bit reverse value by swapping 1 bit chunks then 2 bit chunks and so forth. // Each swap is done by masking out and shifting one of the chunks by twice its size. // Finally, we use div to align the result to the right. res := value // Swap 1 bit chunks. res := or(mul(and(res, 0x5555555555555555), 0x4), and(res, 0xaaaaaaaaaaaaaaaa)) // Swap 2 bit chunks. res := or(mul(and(res, 0x6666666666666666), 0x10), and(res, 0x19999999999999998)) // Swap 4 bit chunks. res := or(mul(and(res, 0x7878787878787878), 0x100), and(res, 0x78787878787878780)) // Swap 8 bit chunks. res := or(mul(and(res, 0x7f807f807f807f80), 0x10000), and(res, 0x7f807f807f807f8000)) // Swap 16 bit chunks. res := or(mul(and(res, 0x7fff80007fff8000), 0x100000000), and(res, 0x7fff80007fff80000000)) // Swap 32 bit chunks. res := or(mul(and(res, 0x7fffffff80000000), 0x10000000000000000), and(res, 0x7fffffff8000000000000000)) // Right align the result. res := div(res, exp(2, sub(127, numberOfBits))) } function expmod(base, exponent, modulus) -> res { let p := mload(0x40) mstore(p, 0x20) // Length of Base. mstore(add(p, 0x20), 0x20) // Length of Exponent. mstore(add(p, 0x40), 0x20) // Length of Modulus. mstore(add(p, 0x60), base) // Base. mstore(add(p, 0x80), exponent) // Exponent. mstore(add(p, 0xa0), modulus) // Modulus. // Call modexp precompile. if iszero(staticcall(gas, 0x05, p, 0xc0, p, 0x20)) { revert(0, 0) } res := mload(p) } let PRIME := 0x800000000000011000000000000000000000000000000000000000000000001 for {} lt(friQueue, friQueueEnd) {friQueue := add(friQueue, 0x60)} { let queryIdx := mload(friQueue) // Adjust queryIdx, see comment in function description. let adjustedQueryIdx := add(queryIdx, evalDomainSize) mstore(friQueue, adjustedQueryIdx) // Compute the evaluation point corresponding to the current queryIdx. mstore(evalPointsPtr, expmod(evalDomainGenerator, bitReverse(queryIdx, log_evalDomainSize), PRIME)) evalPointsPtr := add(evalPointsPtr, 0x20) } } } /* Reads query responses for nColumns from the channel with the corresponding authentication paths. Verifies the consistency of the authentication paths with respect to the given merkleRoot, and stores the query values in proofDataPtr. nTotalColumns is the total number of columns represented in proofDataPtr (which should be an array of nUniqueQueries rows of size nTotalColumns). nColumns is the number of columns for which data will be read by this function. The change to the proofDataPtr array will be as follows: * The first nColumns cells will be set, * The next nTotalColumns - nColumns will be skipped, * The next nColumns cells will be set, * The next nTotalColumns - nColumns will be skipped, * ... To set the last columns for each query simply add an offset to proofDataPtr before calling the function. */ function readQueryResponsesAndDecommit( uint256[] memory ctx, uint256 nTotalColumns, uint256 nColumns, uint256 proofDataPtr, bytes32 merkleRoot) internal view { require(nColumns <= getNColumnsInTrace() + getNColumnsInComposition(), "Too many columns."); uint256 nUniqueQueries = ctx[MM_N_UNIQUE_QUERIES]; uint256 channelPtr = getPtr(ctx, MM_CHANNEL); uint256 friQueue = getPtr(ctx, MM_FRI_QUEUE); uint256 friQueueEnd = friQueue + nUniqueQueries * 0x60; uint256 merkleQueuePtr = getPtr(ctx, MM_MERKLE_QUEUE); uint256 rowSize = 0x20 * nColumns; uint256 lhashMask = getHashMask(); uint256 proofDataSkipBytes = 0x20 * (nTotalColumns - nColumns); assembly { let proofPtr := mload(channelPtr) let merklePtr := merkleQueuePtr for {} lt(friQueue, friQueueEnd) {friQueue := add(friQueue, 0x60)} { let merkleLeaf := and(keccak256(proofPtr, rowSize), lhashMask) if eq(rowSize, 0x20) { // If a leaf contains only 1 field element we don't hash it. merkleLeaf := mload(proofPtr) } // push(queryIdx, hash(row)) to merkleQueue. mstore(merklePtr, mload(friQueue)) mstore(add(merklePtr, 0x20), merkleLeaf) merklePtr := add(merklePtr, 0x40) // Copy query responses to proofData array. // This array will be sent to the OODS contract. for {let proofDataChunk_end := add(proofPtr, rowSize)} lt(proofPtr, proofDataChunk_end) {proofPtr := add(proofPtr, 0x20)} { mstore(proofDataPtr, mload(proofPtr)) proofDataPtr := add(proofDataPtr, 0x20) } proofDataPtr := add(proofDataPtr, proofDataSkipBytes) } mstore(channelPtr, proofPtr) } verify(channelPtr, merkleQueuePtr, merkleRoot, nUniqueQueries); } /* Computes the first FRI layer by reading the query responses and calling the OODS contract. The OODS contract will build and sum boundary constraints that check that the prover provided the proper evaluations for the Out of Domain Sampling. I.e. if the prover said that f(z) = c, the first FRI layer will include the term (f(x) - c)/(x-z). */ function computeFirstFriLayer(uint256[] memory ctx) internal view { adjustQueryIndicesAndPrepareEvalPoints(ctx); // emit LogGas("Prepare evaluation points", gasleft()); readQueryResponsesAndDecommit( ctx, getNColumnsInTrace(), getNColumnsInTrace0(), getPtr(ctx, MM_TRACE_QUERY_RESPONSES), bytes32(ctx[MM_TRACE_COMMITMENT])); // emit LogGas("Read and decommit trace", gasleft()); if (hasInteraction()) { readQueryResponsesAndDecommit( ctx, getNColumnsInTrace(), getNColumnsInTrace1(), getPtr(ctx, MM_TRACE_QUERY_RESPONSES + getNColumnsInTrace0()), bytes32(ctx[MM_TRACE_COMMITMENT + 1])); // emit LogGas("Read and decommit second trace", gasleft()); } readQueryResponsesAndDecommit( ctx, getNColumnsInComposition(), getNColumnsInComposition(), getPtr(ctx, MM_COMPOSITION_QUERY_RESPONSES), bytes32(ctx[MM_OODS_COMMITMENT])); // emit LogGas("Read and decommit composition", gasleft()); address oodsAddress = oodsContractAddress; uint256 friQueue = getPtr(ctx, MM_FRI_QUEUE); uint256 returnDataSize = MAX_N_QUERIES * 0x60; assembly { // Call the OODS contract. if iszero(staticcall(not(0), oodsAddress, ctx, /*sizeof(ctx)*/ mul(add(mload(ctx), 1), 0x20), friQueue, returnDataSize)) { returndatacopy(0, 0, returndatasize) revert(0, returndatasize) } } // emit LogGas("OODS virtual oracle", gasleft()); } /* Reads the last FRI layer (i.e. the polynomial's coefficients) from the channel. This differs from standard reading of channel field elements in several ways: -- The digest is updated by hashing it once with all coefficients simultaneously, rather than iteratively one by one. -- The coefficients are kept in Montgomery form, as is the case throughout the FRI computation. -- The coefficients are not actually read and copied elsewhere, but rather only a pointer to their location in the channel is stored. */ function readLastFriLayer(uint256[] memory ctx) internal pure { uint256 lmmChannel = MM_CHANNEL; uint256 friLastLayerDegBound = ctx[MM_FRI_LAST_LAYER_DEG_BOUND]; uint256 lastLayerPtr; uint256 badInput = 0; assembly { let primeMinusOne := 0x800000000000011000000000000000000000000000000000000000000000000 let channelPtr := add(add(ctx, 0x20), mul(lmmChannel, 0x20)) lastLayerPtr := mload(channelPtr) // Make sure all the values are valid field elements. let length := mul(friLastLayerDegBound, 0x20) let lastLayerEnd := add(lastLayerPtr, length) for { let coefsPtr := lastLayerPtr } lt(coefsPtr, lastLayerEnd) { coefsPtr := add(coefsPtr, 0x20) } { badInput := or(badInput, gt(mload(coefsPtr), primeMinusOne)) } // Copy the digest to the proof area // (store it before the coefficients - this is done because // keccak256 needs all data to be consecutive), // then hash and place back in digestPtr. let newDigestPtr := sub(lastLayerPtr, 0x20) let digestPtr := add(channelPtr, 0x20) // Overwriting the proof to minimize copying of data. mstore(newDigestPtr, mload(digestPtr)) // prng.digest := keccak256(digest||lastLayerCoefs). mstore(digestPtr, keccak256(newDigestPtr, add(length, 0x20))) // prng.counter := 0. mstore(add(channelPtr, 0x40), 0) // Note: proof pointer is not incremented until this point. mstore(channelPtr, lastLayerEnd) } require(badInput == 0, "Invalid field element."); ctx[MM_FRI_LAST_LAYER_PTR] = lastLayerPtr; } function verifyProof( uint256[] memory proofParams, uint256[] memory proof, uint256[] memory publicInput) internal view { // emit LogGas("Transmission", gasleft()); uint256[] memory ctx = initVerifierParams(publicInput, proofParams); uint256 channelPtr = getChannelPtr(ctx); initChannel(channelPtr, getProofPtr(proof), getPublicInputHash(publicInput)); // emit LogGas("Initializations", gasleft()); // Read trace commitment. ctx[MM_TRACE_COMMITMENT] = uint256(readHash(channelPtr, true)); if (hasInteraction()) { // Send interaction elements. VerifierChannel.sendFieldElements( channelPtr, getNInteractionElements(), getPtr(ctx, getMmInteractionElements())); // Read second trace commitment. ctx[MM_TRACE_COMMITMENT + 1] = uint256(readHash(channelPtr, true)); } VerifierChannel.sendFieldElements( channelPtr, getNCoefficients(), getPtr(ctx, getMmCoefficients())); // emit LogGas("Generate coefficients", gasleft()); ctx[MM_OODS_COMMITMENT] = uint256(readHash(channelPtr, true)); // Send Out of Domain Sampling point. VerifierChannel.sendFieldElements(channelPtr, 1, getPtr(ctx, MM_OODS_POINT)); // Read the answers to the Out of Domain Sampling. uint256 lmmOodsValues = getMmOodsValues(); for (uint256 i = lmmOodsValues; i < lmmOodsValues+getNOodsValues(); i++) { ctx[i] = VerifierChannel.readFieldElement(channelPtr, true); } // emit LogGas("Read OODS commitments", gasleft()); oodsConsistencyCheck(ctx); // emit LogGas("OODS consistency check", gasleft()); VerifierChannel.sendFieldElements( channelPtr, getNOodsCoefficients(), getPtr(ctx, getMmOodsCoefficients())); // emit LogGas("Generate OODS coefficients", gasleft()); ctx[MM_FRI_COMMITMENTS] = uint256(VerifierChannel.readHash(channelPtr, true)); uint256 nFriSteps = getFriSteps(ctx).length; uint256 fri_evalPointPtr = getPtr(ctx, MM_FRI_EVAL_POINTS); for (uint256 i = 1; i < nFriSteps - 1; i++) { VerifierChannel.sendFieldElements(channelPtr, 1, fri_evalPointPtr + i * 0x20); ctx[MM_FRI_COMMITMENTS + i] = uint256(VerifierChannel.readHash(channelPtr, true)); } // Send last random FRI evaluation point. VerifierChannel.sendFieldElements( channelPtr, 1, getPtr(ctx, MM_FRI_EVAL_POINTS + nFriSteps - 1)); // Read FRI last layer commitment. readLastFriLayer(ctx); // Generate queries. // emit LogGas("Read FRI commitments", gasleft()); VerifierChannel.verifyProofOfWork(channelPtr, ctx[MM_PROOF_OF_WORK_BITS]); ctx[MM_N_UNIQUE_QUERIES] = VerifierChannel.sendRandomQueries( channelPtr, ctx[MM_N_UNIQUE_QUERIES], ctx[MM_EVAL_DOMAIN_SIZE] - 1, getPtr(ctx, MM_FRI_QUEUE), 0x60); // emit LogGas("Send queries", gasleft()); computeFirstFriLayer(ctx); friVerifyLayers(ctx); } } contract CpuVerifier is StarkParameters, StarkVerifier, CpuPublicInputOffsets, CairoVerifierContract, MemoryPageFactRegistryConstants { CpuConstraintPoly constraintPoly; PeriodicColumnContract pedersenPointsX; PeriodicColumnContract pedersenPointsY; PeriodicColumnContract ecdsaPointsX; PeriodicColumnContract ecdsaPointsY; IFactRegistry memoryPageFactRegistry; constructor( address[] memory auxPolynomials, address oodsContract, address memoryPageFactRegistry_, uint256 numSecurityBits_, uint256 minProofOfWorkBits_) StarkVerifier( numSecurityBits_, minProofOfWorkBits_ ) public { constraintPoly = CpuConstraintPoly(auxPolynomials[0]); pedersenPointsX = PeriodicColumnContract(auxPolynomials[1]); pedersenPointsY = PeriodicColumnContract(auxPolynomials[2]); ecdsaPointsX = PeriodicColumnContract(auxPolynomials[3]); ecdsaPointsY = PeriodicColumnContract(auxPolynomials[4]); oodsContractAddress = oodsContract; memoryPageFactRegistry = IFactRegistry(memoryPageFactRegistry_); } function verifyProofExternal( uint256[] calldata proofParams, uint256[] calldata proof, uint256[] calldata publicInput) external { verifyProof(proofParams, proof, publicInput); } function getNColumnsInTrace() internal pure returns (uint256) { return N_COLUMNS_IN_MASK; } function getNColumnsInTrace0() internal pure returns (uint256) { return N_COLUMNS_IN_TRACE0; } function getNColumnsInTrace1() internal pure returns (uint256) { return N_COLUMNS_IN_TRACE1; } function getNColumnsInComposition() internal pure returns (uint256) { return CONSTRAINTS_DEGREE_BOUND; } function getMmInteractionElements() internal pure returns (uint256) { return MM_INTERACTION_ELEMENTS; } function getMmCoefficients() internal pure returns (uint256) { return MM_COEFFICIENTS; } function getMmOodsValues() internal pure returns (uint256) { return MM_OODS_VALUES; } function getMmOodsCoefficients() internal pure returns (uint256) { return MM_OODS_COEFFICIENTS; } function getNInteractionElements() internal pure returns (uint256) { return N_INTERACTION_ELEMENTS; } function getNCoefficients() internal pure returns (uint256) { return N_COEFFICIENTS; } function getNOodsValues() internal pure returns (uint256) { return N_OODS_VALUES; } function getNOodsCoefficients() internal pure returns (uint256) { return N_OODS_COEFFICIENTS; } function airSpecificInit( uint256[] memory publicInput ) internal view returns (uint256[] memory ctx, uint256 logTraceLength) { require( publicInput.length >= OFFSET_PUBLIC_MEMORY, "publicInput is too short."); ctx = new uint256[](MM_CONTEXT_SIZE); // Context for generated code. ctx[MM_OFFSET_SIZE] = 2**16; ctx[MM_HALF_OFFSET_SIZE] = 2**15; // Number of steps. uint256 logNSteps = publicInput[OFFSET_LOG_N_STEPS]; require(logNSteps < 50, "Number of steps is too large."); ctx[MM_LOG_N_STEPS] = logNSteps; logTraceLength = logNSteps + LOG_CPU_COMPONENT_HEIGHT; // Range check limits. ctx[MM_RC_MIN] = publicInput[OFFSET_RC_MIN]; ctx[MM_RC_MAX] = publicInput[OFFSET_RC_MAX]; require(ctx[MM_RC_MIN] <= ctx[MM_RC_MAX], "rc_min must be <= rc_max"); require(ctx[MM_RC_MAX] < ctx[MM_OFFSET_SIZE], "rc_max out of range"); // Layout. require(publicInput[OFFSET_LAYOUT_CODE] == LAYOUT_CODE, "Layout code mismatch."); // Initial and final pc ("program" memory segment). ctx[MM_INITIAL_PC] = publicInput[OFFSET_PROGRAM_BEGIN_ADDR]; ctx[MM_FINAL_PC] = publicInput[OFFSET_PROGRAM_STOP_PTR]; // Invalid final pc may indicate that the program end was moved, or the program didn't // complete. require(ctx[MM_INITIAL_PC] == 0, "Invalid initial pc"); require(ctx[MM_FINAL_PC] == 2, "Invalid final pc"); // Initial and final ap ("execution" memory segment). ctx[MM_INITIAL_AP] = publicInput[OFFSET_EXECUTION_BEGIN_ADDR]; ctx[MM_FINAL_AP] = publicInput[OFFSET_EXECUTION_STOP_PTR]; { // "output" memory segment. uint256 outputBeginAddr = publicInput[OFFSET_OUTPUT_BEGIN_ADDR]; uint256 outputStopPtr = publicInput[OFFSET_OUTPUT_STOP_PTR]; require(outputBeginAddr <= outputStopPtr, "output begin_addr must be <= stop_ptr"); require(outputStopPtr < 2**64, "Out of range output stop_ptr."); } // "checkpoints" memory segment. ctx[MM_INITIAL_CHECKPOINTS_ADDR] = publicInput[OFFSET_CHECKPOINTS_BEGIN_PTR]; ctx[MM_FINAL_CHECKPOINTS_ADDR] = publicInput[OFFSET_CHECKPOINTS_STOP_PTR]; require( ctx[MM_INITIAL_CHECKPOINTS_ADDR] <= ctx[MM_FINAL_CHECKPOINTS_ADDR], "checkpoints begin_addr must be <= stop_ptr"); require(ctx[MM_FINAL_CHECKPOINTS_ADDR] < 2**64, "Out of range checkpoints stop_ptr."); require( (ctx[MM_FINAL_CHECKPOINTS_ADDR] - ctx[MM_INITIAL_CHECKPOINTS_ADDR]) % 2 == 0, "Checkpoints should occupy an even number of cells."); // "pedersen" memory segment. ctx[MM_INITIAL_PEDERSEN_ADDR] = publicInput[OFFSET_PEDERSEN_BEGIN_ADDR]; require(ctx[MM_INITIAL_PEDERSEN_ADDR] < 2**64, "Out of range pedersen begin_addr."); uint256 pedersenStopPtr = publicInput[OFFSET_PEDERSEN_STOP_PTR]; uint256 pedersenMaxStopPtr = ctx[MM_INITIAL_PEDERSEN_ADDR] + 3 * safeDiv( 2 ** ctx[MM_LOG_N_STEPS], PEDERSEN_BUILTIN_RATIO); require( ctx[MM_INITIAL_PEDERSEN_ADDR] <= pedersenStopPtr && pedersenStopPtr <= pedersenMaxStopPtr, "Invalid pedersen stop_ptr"); // "range_check" memory segment. ctx[MM_INITIAL_RC_ADDR] = publicInput[OFFSET_RANGE_CHECK_BEGIN_ADDR]; require(ctx[MM_INITIAL_RC_ADDR] < 2**64, "Out of range range_check begin_addr."); uint256 rcStopPtr = publicInput[OFFSET_RANGE_CHECK_STOP_PTR]; uint256 rcMaxStopPtr = ctx[MM_INITIAL_RC_ADDR] + safeDiv(2 ** ctx[MM_LOG_N_STEPS], RC_BUILTIN_RATIO); require( ctx[MM_INITIAL_RC_ADDR] <= rcStopPtr && rcStopPtr <= rcMaxStopPtr, "Invalid range_check stop_ptr"); // "ecdsa" memory segment. ctx[MM_INITIAL_ECDSA_ADDR] = publicInput[OFFSET_ECDSA_BEGIN_ADDR]; require(ctx[MM_INITIAL_ECDSA_ADDR] < 2**64, "Out of range ecdsa begin_addr."); uint256 ecdsaStopPtr = publicInput[OFFSET_ECDSA_STOP_PTR]; uint256 ecdsaMaxStopPtr = ctx[MM_INITIAL_ECDSA_ADDR] + 2 * safeDiv(2 ** ctx[MM_LOG_N_STEPS], ECDSA_BUILTIN_RATIO); require( ctx[MM_INITIAL_ECDSA_ADDR] <= ecdsaStopPtr && ecdsaStopPtr <= ecdsaMaxStopPtr, "Invalid ecdsa stop_ptr"); // Public memory. require( publicInput[OFFSET_N_PUBLIC_MEMORY_PAGES] >= 1 && publicInput[OFFSET_N_PUBLIC_MEMORY_PAGES] < 100000, "Invalid number of memory pages."); ctx[MM_N_PUBLIC_MEM_PAGES] = publicInput[OFFSET_N_PUBLIC_MEMORY_PAGES]; { // Compute the total number of public memory entries. uint256 n_public_memory_entries = 0; for (uint256 page = 0; page < ctx[MM_N_PUBLIC_MEM_PAGES]; page++) { uint256 n_page_entries = publicInput[getOffsetPageSize(page)]; require(n_page_entries < 2**30, "Too many public memory entries in one page."); n_public_memory_entries += n_page_entries; } ctx[MM_N_PUBLIC_MEM_ENTRIES] = n_public_memory_entries; } uint256 expectedPublicInputLength = getPublicInputLength(ctx[MM_N_PUBLIC_MEM_PAGES]); require( expectedPublicInputLength == publicInput.length, "Public input length mismatch."); uint256 lmmPublicInputPtr = MM_PUBLIC_INPUT_PTR; assembly { // Set public input pointer to point at the first word of the public input // (skipping length word). mstore(add(ctx, mul(add(lmmPublicInputPtr, 1), 0x20)), add(publicInput, 0x20)) } // Pedersen's shiftPoint values. ctx[MM_PEDERSEN__SHIFT_POINT_X] = 0x49ee3eba8c1600700ee1b87eb599f16716b0b1022947733551fde4050ca6804; ctx[MM_PEDERSEN__SHIFT_POINT_Y] = 0x3ca0cfe4b3bc6ddf346d49d06ea0ed34e621062c0e056c1d0405d266e10268a; ctx[MM_RC16__PERM__PUBLIC_MEMORY_PROD] = 1; ctx[MM_ECDSA__SIG_CONFIG_ALPHA] = 1; ctx[MM_ECDSA__SIG_CONFIG_BETA] = 0x6f21413efbe40de150e596d72f7a8c5609ad26c15c915c1f4cdfcb99cee9e89; ctx[MM_ECDSA__SIG_CONFIG_SHIFT_POINT_X] = 0x49ee3eba8c1600700ee1b87eb599f16716b0b1022947733551fde4050ca6804; ctx[MM_ECDSA__SIG_CONFIG_SHIFT_POINT_Y] = 0x3ca0cfe4b3bc6ddf346d49d06ea0ed34e621062c0e056c1d0405d266e10268a; } function getPublicInputHash(uint256[] memory publicInput) internal pure returns (bytes32 publicInputHash) { // The initial seed consists of the first part of publicInput. Specifically, it does not // include the page products (which are only known later in the process, as they depend on // the values of z and alpha). uint256 nPages = publicInput[OFFSET_N_PUBLIC_MEMORY_PAGES]; uint256 publicInputSizeForHash = 0x20 * (getOffsetPaddingCell(nPages) + 2); assembly { publicInputHash := keccak256(add(publicInput, 0x20), publicInputSizeForHash) } } function getCoefficients(uint256[] memory ctx) internal pure returns (uint256[N_COEFFICIENTS] memory coefficients) { uint256 offset = 0x20 + MM_COEFFICIENTS * 0x20; assembly { coefficients := add(ctx, offset) } return coefficients; } /* Computes the value of the public memory quotient: numerator / (denominator * padding) where: numerator = (z - (0 + alpha * 0))^S, denominator = \prod_i( z - (addr_i + alpha * value_i) ), padding = (z - (padding_addr + alpha * padding_value))^(S - N), N is the actual number of public memory cells, and S is the number of cells allocated for the public memory (which includes the padding). */ function computePublicMemoryQuotient(uint256[] memory ctx) internal view returns (uint256) { uint256 nValues = ctx[MM_N_PUBLIC_MEM_ENTRIES]; uint256 z = ctx[MM_MEMORY__MULTI_COLUMN_PERM__PERM__INTERACTION_ELM]; uint256 alpha = ctx[MM_MEMORY__MULTI_COLUMN_PERM__HASH_INTERACTION_ELM0]; // The size that is allocated to the public memory. uint256 publicMemorySize = safeDiv(ctx[MM_TRACE_LENGTH], PUBLIC_MEMORY_STEP); require(nValues < 0x1000000, "Overflow protection failed."); require(nValues <= publicMemorySize, "Number of values of public memory is too large."); uint256 nPublicMemoryPages = ctx[MM_N_PUBLIC_MEM_PAGES]; uint256 cumulativeProdsPtr = ctx[MM_PUBLIC_INPUT_PTR] + getOffsetPageProd(0, nPublicMemoryPages) * 0x20; uint256 denominator = computePublicMemoryProd( cumulativeProdsPtr, nPublicMemoryPages, K_MODULUS); // Compute address + alpha * value for the first address-value pair for padding. uint256 publicInputPtr = ctx[MM_PUBLIC_INPUT_PTR]; uint256 paddingOffset = getOffsetPaddingCell(nPublicMemoryPages); uint256 paddingAddr; uint256 paddingValue; assembly { paddingAddr := mload( add(publicInputPtr, mul(0x20, paddingOffset))) paddingValue := mload( add(publicInputPtr, mul(0x20, add(paddingOffset, 1)))) } uint256 hash_first_address_value = fadd(paddingAddr, fmul(paddingValue, alpha)); // Pad the denominator with the shifted value of hash_first_address_value. uint256 denom_pad = fpow( fsub(z, hash_first_address_value), publicMemorySize - nValues); denominator = fmul(denominator, denom_pad); // Calculate the numerator. uint256 numerator = fpow(z, publicMemorySize); // Compute the final result: numerator * denominator^(-1). return fmul(numerator, inverse(denominator)); } /* Computes the cumulative product of the public memory cells: \prod_i( z - (addr_i + alpha * value_i) ). publicMemoryPtr is an array of nValues pairs (address, value). z and alpha are the perm and hash interaction elements required to calculate the product. */ function computePublicMemoryProd( uint256 cumulativeProdsPtr, uint256 nPublicMemoryPages, uint256 prime) internal pure returns (uint256 res) { assembly { let lastPtr := add(cumulativeProdsPtr, mul(nPublicMemoryPages, 0x20)) res := 1 for { let ptr := cumulativeProdsPtr } lt(ptr, lastPtr) { ptr := add(ptr, 0x20) } { res := mulmod(res, mload(ptr), prime) } } } /* Verifies that all the information on each public memory page (size, hash, prod, and possibly address) is consistent with z and alpha, by checking that the corresponding facts were registered on memoryPageFactRegistry. */ function verifyMemoryPageFacts(uint256[] memory ctx) internal view { uint256 nPublicMemoryPages = ctx[MM_N_PUBLIC_MEM_PAGES]; for (uint256 page = 0; page < nPublicMemoryPages; page++) { // Fetch page values from the public input (hash, product and size). uint256 memoryHashPtr = ctx[MM_PUBLIC_INPUT_PTR] + getOffsetPageHash(page) * 0x20; uint256 memoryHash; uint256 prodPtr = ctx[MM_PUBLIC_INPUT_PTR] + getOffsetPageProd(page, nPublicMemoryPages) * 0x20; uint256 prod; uint256 pageSizePtr = ctx[MM_PUBLIC_INPUT_PTR] + getOffsetPageSize(page) * 0x20; uint256 pageSize; assembly { pageSize := mload(pageSizePtr) prod := mload(prodPtr) memoryHash := mload(memoryHashPtr) } uint256 pageAddr = 0; if (page > 0) { uint256 pageAddrPtr = ctx[MM_PUBLIC_INPUT_PTR] + getOffsetPageAddr(page) * 0x20; assembly { pageAddr := mload(pageAddrPtr) } } // Verify that a corresponding fact is registered attesting to the consistency of the page // information with z and alpha. bytes32 factHash = keccak256( abi.encodePacked( page == 0 ? REGULAR_PAGE : CONTINUOUS_PAGE, K_MODULUS, pageSize, /*z=*/ctx[MM_INTERACTION_ELEMENTS], /*alpha=*/ctx[MM_INTERACTION_ELEMENTS + 1], prod, memoryHash, pageAddr) ); require( // NOLINT: calls-loop. memoryPageFactRegistry.isValid(factHash), "Memory page fact was not registered."); } } /* Checks that the trace and the compostion agree at oodsPoint, assuming the prover provided us with the proper evaluations. Later, we will use boundery constraints to check that those evaluations are actully consistent with the commited trace and composition ploynomials. */ function oodsConsistencyCheck(uint256[] memory ctx) internal view { verifyMemoryPageFacts(ctx); uint256 oodsPoint = ctx[MM_OODS_POINT]; // The number of copies in the pedersen hash periodic columns is // nSteps / PEDERSEN_BUILTIN_RATIO / PEDERSEN_BUILTIN_REPETITIONS. uint256 nPedersenHashCopies = safeDiv( 2 ** ctx[MM_LOG_N_STEPS], PEDERSEN_BUILTIN_RATIO * PEDERSEN_BUILTIN_REPETITIONS); uint256 zPointPowPedersen = fpow(oodsPoint, nPedersenHashCopies); ctx[MM_PERIODIC_COLUMN__PEDERSEN__POINTS__X] = pedersenPointsX.compute(zPointPowPedersen); ctx[MM_PERIODIC_COLUMN__PEDERSEN__POINTS__Y] = pedersenPointsY.compute(zPointPowPedersen); // The number of copies in the ECDSA signature periodic columns is // nSteps / ECDSA_BUILTIN_RATIO / ECDSA_BUILTIN_REPETITIONS. uint256 nEcdsaSignatureCopies = safeDiv( 2 ** ctx[MM_LOG_N_STEPS], ECDSA_BUILTIN_RATIO * ECDSA_BUILTIN_REPETITIONS); uint256 zPointPowEcdsa = fpow(oodsPoint, nEcdsaSignatureCopies); ctx[MM_PERIODIC_COLUMN__ECDSA__GENERATOR_POINTS__X] = ecdsaPointsX.compute(zPointPowEcdsa); ctx[MM_PERIODIC_COLUMN__ECDSA__GENERATOR_POINTS__Y] = ecdsaPointsY.compute(zPointPowEcdsa); ctx[MM_MEMORY__MULTI_COLUMN_PERM__PERM__INTERACTION_ELM] = ctx[MM_INTERACTION_ELEMENTS]; ctx[MM_MEMORY__MULTI_COLUMN_PERM__HASH_INTERACTION_ELM0] = ctx[MM_INTERACTION_ELEMENTS + 1]; ctx[MM_RC16__PERM__INTERACTION_ELM] = ctx[MM_INTERACTION_ELEMENTS + 2]; uint256 public_memory_prod = computePublicMemoryQuotient(ctx); ctx[MM_MEMORY__MULTI_COLUMN_PERM__PERM__PUBLIC_MEMORY_PROD] = public_memory_prod; uint256 compositionFromTraceValue; address lconstraintPoly = address(constraintPoly); uint256 offset = 0x20 * (1 + MM_CONSTRAINT_POLY_ARGS_START); uint256 size = 0x20 * (MM_CONSTRAINT_POLY_ARGS_END - MM_CONSTRAINT_POLY_ARGS_START); assembly { // Call CpuConstraintPoly contract. let p := mload(0x40) if iszero( staticcall( not(0), lconstraintPoly, add(ctx, offset), size, p, 0x20 ) ) { returndatacopy(0, 0, returndatasize) revert(0, returndatasize) } compositionFromTraceValue := mload(p) } uint256 claimedComposition = fadd( ctx[MM_OODS_VALUES + MASK_SIZE], fmul(oodsPoint, ctx[MM_OODS_VALUES + MASK_SIZE + 1]) ); require( compositionFromTraceValue == claimedComposition, "claimedComposition does not match trace" ); } function safeDiv(uint256 numerator, uint256 denominator) internal pure returns (uint256) { require(denominator > 0, "The denominator must not be zero"); require(numerator % denominator == 0, "The numerator is not divisible by the denominator."); return numerator / denominator; } } contract CpuFrilessVerifier is CpuVerifier, MerkleStatementVerifier, FriStatementVerifier { constructor( address[] memory auxPolynomials, address oodsContract, address memoryPageFactRegistry_, address merkleStatementContractAddress, address friStatementContractAddress, uint256 numSecurityBits_, uint256 minProofOfWorkBits_ ) public MerkleStatementVerifier(merkleStatementContractAddress) FriStatementVerifier(friStatementContractAddress) CpuVerifier( auxPolynomials, oodsContract, memoryPageFactRegistry_, numSecurityBits_, minProofOfWorkBits_ ) { // solium-disable-previous-line no-empty-blocks } }

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{"success": true, "error": null, "results": {"detectors": [{"check": "incorrect-shift", "impact": "High", "confidence": "High"}, {"check": "divide-before-multiply", "impact": "Medium", "confidence": "Medium"}]}}

0x745ec6c92e3fa2ac470b3323128c6ad2eab21d67

pragma solidity 0.6.5; pragma experimental ABIEncoderV2; abstract contract Ownable { modifier onlyOwner { require(msg.sender == owner, "O: onlyOwner function!"); _; } address public owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @notice Initializes owner variable with msg.sender address. */ constructor() internal { owner = msg.sender; emit OwnershipTransferred(address(0), msg.sender); } /** * @notice Transfers ownership to the desired address. * The function is callable only by the owner. */ function transferOwnership(address _owner) external onlyOwner { require(_owner != address(0), "O: new owner is the zero address!"); emit OwnershipTransferred(owner, _owner); owner = _owner; } } contract CompoundRegistry is Ownable { mapping(address => address) internal cTokens; constructor() public { cTokens[0x89d24A6b4CcB1B6fAA2625fE562bDD9a23260359] = 0xF5DCe57282A584D2746FaF1593d3121Fcac444dC; cTokens[0x1985365e9f78359a9B6AD760e32412f4a445E862] = 0x158079Ee67Fce2f58472A96584A73C7Ab9AC95c1; cTokens[0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE] = 0x4Ddc2D193948926D02f9B1fE9e1daa0718270ED5; cTokens[0x6B175474E89094C44Da98b954EedeAC495271d0F] = 0x5d3a536E4D6DbD6114cc1Ead35777bAB948E3643; cTokens[0x0D8775F648430679A709E98d2b0Cb6250d2887EF] = 0x6C8c6b02E7b2BE14d4fA6022Dfd6d75921D90E4E; cTokens[0x2260FAC5E5542a773Aa44fBCfeDf7C193bc2C599] = 0xC11b1268C1A384e55C48c2391d8d480264A3A7F4; cTokens[0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48] = 0x39AA39c021dfbaE8faC545936693aC917d5E7563; cTokens[0xE41d2489571d322189246DaFA5ebDe1F4699F498] = 0xB3319f5D18Bc0D84dD1b4825Dcde5d5f7266d407; cTokens[0xdAC17F958D2ee523a2206206994597C13D831ec7] = 0xf650C3d88D12dB855b8bf7D11Be6C55A4e07dCC9; cTokens[0x1f9840a85d5aF5bf1D1762F925BDADdC4201F984] = 0x35A18000230DA775CAc24873d00Ff85BccdeD550; } function getCToken(address token) external view returns (address) { return cTokens[token]; } function setCToken(address token, address cToken) external onlyOwner returns (address) { return cTokens[token] = cToken; } }

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{"success": true, "error": null, "results": {}}

0x746b4296d3589ffbb42c8c19b3b927436bb19413

pragma solidity 0.6.10; contract ECDH { using SafeMath for uint256; uint256 constant private _GX = 0x79BE667EF9DCBBAC55A06295CE870B07029BFCDB2DCE28D959F2815B16F81798; uint256 constant private _GY = 0x483ADA7726A3C4655DA4FBFC0E1108A8FD17B448A68554199C47D08FFB10D4B8; uint256 constant private _N = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC2F; uint256 constant private _A = 0; function publicKey(uint256 privKey) external pure returns (uint256 qx, uint256 qy) { uint256 x; uint256 y; uint256 z; (x, y, z) = ecMul( privKey, _GX, _GY, 1 ); z = inverse(z); qx = mulmod(x, z, _N); qy = mulmod(y, z, _N); } function deriveKey( uint256 privKey, uint256 pubX, uint256 pubY ) external pure returns (uint256 qx, uint256 qy) { uint256 x; uint256 y; uint256 z; (x, y, z) = ecMul( privKey, pubX, pubY, 1 ); z = inverse(z); qx = mulmod(x, z, _N); qy = mulmod(y, z, _N); } function jAdd( uint256 x1, uint256 z1, uint256 x2, uint256 z2 ) public pure returns (uint256 x3, uint256 z3) { (x3, z3) = (addmod(mulmod(z2, x1, _N), mulmod(x2, z1, _N), _N), mulmod(z1, z2, _N)); } function jSub( uint256 x1, uint256 z1, uint256 x2, uint256 z2 ) public pure returns (uint256 x3, uint256 z3) { (x3, z3) = (addmod(mulmod(z2, x1, _N), mulmod(_N.sub(x2), z1, _N), _N), mulmod(z1, z2, _N)); } function jMul( uint256 x1, uint256 z1, uint256 x2, uint256 z2 ) public pure returns (uint256 x3, uint256 z3) { (x3, z3) = (mulmod(x1, x2, _N), mulmod(z1, z2, _N)); } function jDiv( uint256 x1, uint256 z1, uint256 x2, uint256 z2 ) public pure returns (uint256 x3, uint256 z3) { (x3, z3) = (mulmod(x1, z2, _N), mulmod(z1, x2, _N)); } function inverse(uint256 a) public pure returns (uint256 invA) { uint256 t = 0; uint256 newT = 1; uint256 r = _N; uint256 newR = a; uint256 q; while (newR != 0) { q = r.div(newR); (t, newT) = (newT, addmod(t, (_N.sub(mulmod(q, newT, _N))), _N)); (r, newR) = (newR, r % newR); } return t; } function ecAdd( uint256 x1, uint256 y1, uint256 z1, uint256 x2, uint256 y2, uint256 z2 ) public pure returns (uint256 x3, uint256 y3, uint256 z3) { uint256 ln; uint256 lz; uint256 da; uint256 db; if ((x1 == 0) && (y1 == 0)) { return (x2, y2, z2); } if ((x2 == 0) && (y2 == 0)) { return (x1, y1, z1); } if ((x1 == x2) && (y1 == y2)) { (ln, lz) = jMul(x1, z1, x1, z1); (ln, lz) = jMul(ln,lz,3,1); (ln, lz) = jAdd(ln,lz,_A,1); (da, db) = jMul(y1,z1,2,1); } else { (ln, lz) = jSub(y2,z2,y1,z1); (da, db) = jSub(x2,z2,x1,z1); } (ln, lz) = jDiv(ln,lz,da,db); (x3, da) = jMul(ln,lz,ln,lz); (x3, da) = jSub(x3,da,x1,z1); (x3, da) = jSub(x3,da,x2,z2); (y3, db) = jSub(x1,z1,x3,da); (y3, db) = jMul(y3,db,ln,lz); (y3, db) = jSub(y3,db,y1,z1); if (da != db) { x3 = mulmod(x3, db, _N); y3 = mulmod(y3, da, _N); z3 = mulmod(da, db, _N); } else { z3 = da; } } function ecDouble( uint256 x1, uint256 y1, uint256 z1 ) public pure returns (uint256 x3, uint256 y3, uint256 z3) { (x3, y3, z3) = ecAdd( x1, y1, z1, x1, y1, z1 ); } function ecMul( uint256 d, uint256 x1, uint256 y1, uint256 z1 ) public pure returns (uint256 x3, uint256 y3, uint256 z3) { uint256 remaining = d; uint256 px = x1; uint256 py = y1; uint256 pz = z1; uint256 acx = 0; uint256 acy = 0; uint256 acz = 1; if (d == 0) { return (0, 0, 1); } while (remaining != 0) { if ((remaining & 1) != 0) { (acx, acy, acz) = ecAdd( acx, acy, acz, px, py, pz ); } remaining = remaining.div(2); (px, py, pz) = ecDouble(px, py, pz); } (x3, y3, z3) = (acx, acy, acz); } } library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { // Solidity only automatically asserts when dividing by 0 require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } }

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0x746F87000c696E3879e02C7eba184Cc922a2E15b

pragma solidity 0.6.12; library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } contract sbTimelock { using SafeMath for uint256; event NewAdmin(address indexed newAdmin); event NewPendingAdmin(address indexed newPendingAdmin); event NewDelay(uint256 indexed newDelay); event CancelTransaction( bytes32 indexed txHash, address indexed target, uint256 value, string signature, bytes data, uint256 eta ); event ExecuteTransaction( bytes32 indexed txHash, address indexed target, uint256 value, string signature, bytes data, uint256 eta ); event QueueTransaction( bytes32 indexed txHash, address indexed target, uint256 value, string signature, bytes data, uint256 eta ); uint256 public constant GRACE_PERIOD = 14 days; uint256 public constant MINIMUM_DELAY = 2 days; uint256 public constant MAXIMUM_DELAY = 30 days; address public admin; address public pendingAdmin; uint256 public delay; bool internal initDone; mapping(bytes32 => bool) public queuedTransactions; function init(address admin_, uint256 delay_) public { require(!initDone, 'sbTimelock::init: Init has already been called.'); require(delay_ >= MINIMUM_DELAY, 'sbTimelock::init: Delay must exceed minimum delay.'); require(delay_ <= MAXIMUM_DELAY, 'sbTimelock::init: Delay must not exceed maximum delay.'); admin = admin_; delay = delay_; initDone = true; } receive() external payable {} function setDelay(uint256 delay_) public { require(msg.sender == address(this), 'sbTimelock::setDelay: Call must come from sbTimelock.'); require(delay_ >= MINIMUM_DELAY, 'sbTimelock::setDelay: Delay must exceed minimum delay.'); require(delay_ <= MAXIMUM_DELAY, 'sbTimelock::setDelay: Delay must not exceed maximum delay.'); delay = delay_; emit NewDelay(delay); } function acceptAdmin() public { require(msg.sender == pendingAdmin, 'sbTimelock::acceptAdmin: Call must come from pendingAdmin.'); admin = msg.sender; pendingAdmin = address(0); emit NewAdmin(admin); } function setPendingAdmin(address pendingAdmin_) public { require(msg.sender == address(this), 'sbTimelock::setPendingAdmin: Call must come from sbTimelock.'); pendingAdmin = pendingAdmin_; emit NewPendingAdmin(pendingAdmin); } function queueTransaction( address target, uint256 value, string memory signature, bytes memory data, uint256 eta ) public returns (bytes32) { require(msg.sender == admin, 'sbTimelock::queueTransaction: Call must come from admin.'); require( eta >= getBlockTimestamp().add(delay), 'sbTimelock::queueTransaction: Estimated execution block must satisfy delay.' ); bytes32 txHash = keccak256(abi.encode(target, value, signature, data, eta)); queuedTransactions[txHash] = true; emit QueueTransaction(txHash, target, value, signature, data, eta); return txHash; } function cancelTransaction( address target, uint256 value, string memory signature, bytes memory data, uint256 eta ) public { require(msg.sender == admin, 'sbTimelock::cancelTransaction: Call must come from admin.'); bytes32 txHash = keccak256(abi.encode(target, value, signature, data, eta)); queuedTransactions[txHash] = false; emit CancelTransaction(txHash, target, value, signature, data, eta); } function executeTransaction( address target, uint256 value, string memory signature, bytes memory data, uint256 eta ) public payable returns (bytes memory) { require(msg.sender == admin, 'sbTimelock::executeTransaction: Call must come from admin.'); bytes32 txHash = keccak256(abi.encode(target, value, signature, data, eta)); require(queuedTransactions[txHash], "sbTimelock::executeTransaction: Transaction hasn't been queued."); require(getBlockTimestamp() >= eta, "sbTimelock::executeTransaction: Transaction hasn't surpassed time lock."); require(getBlockTimestamp() <= eta.add(GRACE_PERIOD), 'sbTimelock::executeTransaction: Transaction is stale.'); queuedTransactions[txHash] = false; bytes memory callData; if (bytes(signature).length == 0) { callData = data; } else { callData = abi.encodePacked(bytes4(keccak256(bytes(signature))), data); } // solium-disable-next-line security/no-call-value (bool success, bytes memory returnData) = target.call{ value: value }(callData); require(success, 'sbTimelock::executeTransaction: Transaction execution reverted.'); emit ExecuteTransaction(txHash, target, value, signature, data, eta); return returnData; } function getBlockTimestamp() internal view returns (uint256) { // solium-disable-next-line security/no-block-members return block.timestamp; } }

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{"success": true, "error": null, "results": {}}

0x74700f8e2dd1b6b1e5c71723e5d976ef391c3eab

pragma solidity 0.6.2; library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // This method relies in extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. uint256 size; // solhint-disable-next-line no-inline-assembly assembly { size := extcodesize(account) } return size > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain`call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return _functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); return _functionCallWithValue(target, data, value, errorMessage); } function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) { require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: weiValue }(data); if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } abstract contract Context { function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } contract MXXERC20 is Context, IERC20 { using SafeMath for uint256; using Address for address; mapping (address => uint256) private _balances; mapping (address => mapping (address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; uint8 private _decimals; /** * @dev Sets the values for {name} and {symbol}, initializes {decimals} with * a default value of 18. * * To select a different value for {decimals}, use {_setupDecimals}. * * All three of these values are immutable: they can only be set once during * construction. */ constructor (string memory name, string memory symbol) public { _name = name; _symbol = symbol; _decimals = 18; } /** * @dev Returns the name of the token. */ function name() public view returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5,05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is * called. * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view returns (uint8) { return _decimals; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `recipient` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address recipient, uint256 amount) public virtual override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { _approve(_msgSender(), spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}; * * Requirements: * - `sender` and `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. * - the caller must have allowance for ``sender``'s tokens of at least * `amount`. */ function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) { _transfer(sender, recipient, amount); _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance")); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue)); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero")); return true; } /** * @dev Moves tokens `amount` from `sender` to `recipient`. * * This is internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `sender` cannot be the zero address. // Commented for MXX * - `recipient` cannot be the zero address. // Commented for MXX * - `sender` must have a balance of at least `amount`. */ function _transfer(address sender, address recipient, uint256 amount) internal virtual { //require(sender != address(0), "ERC20: transfer from the zero address"); //require(recipient != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(sender, recipient, amount); _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance"); _balances[recipient] = _balances[recipient].add(amount); emit Transfer(sender, recipient, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements * * - `to` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply = _totalSupply.add(amount); _balances[account] = _balances[account].add(amount); emit Transfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance"); _totalSupply = _totalSupply.sub(amount); emit Transfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens. * * This is internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve(address owner, address spender, uint256 amount) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Sets {decimals} to a value other than the default one of 18. * * WARNING: This function should only be called from the constructor. Most * applications that interact with token contracts will not expect * {decimals} to ever change, and may work incorrectly if it does. */ function _setupDecimals(uint8 decimals_) internal { _decimals = decimals_; } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be to transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { } } contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor () internal { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), msgSender); } /** * @dev Returns the address of the current owner. */ function owner() public view returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(_owner == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { emit OwnershipTransferred(_owner, address(0)); _owner = address(0); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } } contract ReentrancyGuard { // Booleans are more expensive than uint256 or any type that takes up a full // word because each write operation emits an extra SLOAD to first read the // slot's contents, replace the bits taken up by the boolean, and then write // back. This is the compiler's defense against contract upgrades and // pointer aliasing, and it cannot be disabled. // The values being non-zero value makes deployment a bit more expensive, // but in exchange the refund on every call to nonReentrant will be lower in // amount. Since refunds are capped to a percentage of the total // transaction's gas, it is best to keep them low in cases like this one, to // increase the likelihood of the full refund coming into effect. uint256 private constant _NOT_ENTERED = 1; uint256 private constant _ENTERED = 2; uint256 private _status; constructor () internal { _status = _NOT_ENTERED; } /** * @dev Prevents a contract from calling itself, directly or indirectly. * Calling a `nonReentrant` function from another `nonReentrant` * function is not supported. It is possible to prevent this from happening * by making the `nonReentrant` function external, and make it call a * `private` function that does the actual work. */ modifier nonReentrant() { // On the first call to nonReentrant, _notEntered will be true require(_status != _ENTERED, "ReentrancyGuard: reentrant call"); // Any calls to nonReentrant after this point will fail _status = _ENTERED; _; // By storing the original value once again, a refund is triggered (see // https://eips.ethereum.org/EIPS/eip-2200) _status = _NOT_ENTERED; } } library SafeERC20 { using SafeMath for uint256; using Address for address; function safeTransfer(IERC20 token, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value)); } /** * @dev Deprecated. This function has issues similar to the ones found in * {IERC20-approve}, and its usage is discouraged. * * Whenever possible, use {safeIncreaseAllowance} and * {safeDecreaseAllowance} instead. */ function safeApprove(IERC20 token, address spender, uint256 value) internal { // safeApprove should only be called when setting an initial allowance, // or when resetting it to zero. To increase and decrease it, use // 'safeIncreaseAllowance' and 'safeDecreaseAllowance' // solhint-disable-next-line max-line-length require((value == 0) || (token.allowance(address(this), spender) == 0), "SafeERC20: approve from non-zero to non-zero allowance" ); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value)); } function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).add(value); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero"); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). */ function _callOptionalReturn(IERC20 token, bytes memory data) private { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that // the target address contains contract code and also asserts for success in the low-level call. bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed"); if (returndata.length > 0) { // Return data is optional // solhint-disable-next-line max-line-length require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } } } library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } contract YieldContract is Ownable, ReentrancyGuard { // Using SafeERC20 for ERC20 using SafeERC20 for ERC20; // Using SafeMath Library to prevent integer overflow using SafeMath for uint256; // Using Address library for ERC20 contract checks using Address for address; /** * DEFINING VARIABLES */ /** * @dev - Array to store valid ERC20 addresses */ address[] public erc20List; /** * @dev - A struct to store ERC20 details * @notice symbol - The symbol/ ticker symbol of ERC20 contract * @notice isValid - Boolean variable indicating if the ERC20 is valid to be used for yield contracts * @notice noContracts - Integer indicating the number of contracts associated with it * @notice mFactor - Value of a coin/token in USD * 10 power 18 */ struct Erc20Details { string symbol; bool isValid; uint64 noContracts; uint256 mFactor; } /** * @dev - A mapping to map ERC20 addresses to its details */ mapping(address => Erc20Details) public erc20Map; /** * @dev - Array to store user created yield contract IDs */ bytes32[] public allContracts; /** * @dev - A enum to store yield contract status */ enum Status { Inactive, Active, OpenMarket, Claimed, Destroyed } /** * @dev - A enum to switch set value case */ enum ParamType { ContractFee, MinEarlyRedeemFee, MaxEarlyRedeemFee, TotalAllocatedMxx } /** * @dev - A struct to store yield contract details * @notice contractOwner - The owner of the yield contract * @notice tokenAddress - ERC20 contract address (if ETH then ZERO_ADDRESS) * @notice startTime - Start time of the yield contract (in unix timestamp) * @notice endTime - End time of the yield contract (in unix timestamp) * @notice tenure - The agreement tenure in days * @notice contractStatus - The status of a contract (can be Inactive/Active/OpenMarket/Claimed/Destroyed) * @notice collateral - Value of collateral (multiplied by 10 power 18 to handle decimals) * @notice mxxToBeMinted - The final MXX token value to be returned to the contract owner * @notice interest - APY or Annual Percentage Yield (returned from tenureApyMap) */ struct ContractDetails { address contractOwner; uint48 startTime; uint48 endTime; address tokenAddress; uint16 tenure; uint64 interest; Status contractStatus; uint256 collateral; uint256 mxxToBeMinted; } /** * @dev - A mapping to map contract IDs to their details */ mapping(bytes32 => ContractDetails) public contractMap; /** * @dev - A mapping to map tenure in days to apy (Annual Percentage Yield aka interest rate) * Percent rate is multiplied by 10 power 6. (For e.g. if 5% then value is 0.05 * 10 power 6) */ mapping(uint256 => uint64) public tenureApyMap; /** * @dev - Variable to store contract fee * If 10% then value is 0.1 * 10 power 6 */ uint64 public contractFee; /** * @dev - Constant variable to store Official MXX ERC20 token address */ address public constant MXX_ADDRESS = 0x8a6f3BF52A26a21531514E23016eEAe8Ba7e7018; /** * @dev - Constant address to store the Official MXX Burn Address */ address public constant BURN_ADDRESS = 0x19B292c1a84379Aab41564283e7f75bF20e45f91; /** * @dev - Constant variable to store ETH address */ address internal constant ZERO_ADDRESS = address(0); /** * @dev - Constant variable to store 10 power of 6 */ uint64 internal constant POW6 = 1000000; /** * @dev - Variable to store total allocated MXX for yield contracts */ uint256 public totalAllocatedMxx; /** * @dev - Variable to total MXX minted from yield contracts */ uint256 public mxxMintedFromContract; /** * @dev - Variables to store % of penalty / redeem fee fees * If min penalty / redeem fee is 5% then value is 0.05 * 10 power 6 * If max penalty / redeem fee is 50% then value is 0.5 * 10 power 6 */ uint64 public minEarlyRedeemFee; uint64 public maxEarlyRedeemFee; /** * CONSTRUCTOR FUNCTION */ constructor(uint256 _mxxmFactor) public Ownable() { // Setting default variables tenureApyMap[90] = 2 * POW6; tenureApyMap[180] = 4 * POW6; tenureApyMap[270] = 10 * POW6; contractFee = (8 * POW6) / 100; totalAllocatedMxx = 1000000000 * (10**8); // 1 billion initial Mxx allocated // minEarlyRedeemFee = (5 * POW6) / 100; maxEarlyRedeemFee = (5 * POW6) / 10; addErc20(MXX_ADDRESS, _mxxmFactor); } /** * DEFINE MODIFIER */ /** * @dev Throws if address is a user address (except ZERO_ADDRESS) * @param _erc20Address - Address to be checked */ modifier onlyErc20OrEth(address _erc20Address) { require( _erc20Address == ZERO_ADDRESS || Address.isContract(_erc20Address), "Not contract address" ); _; } /** * @dev Throws if address in not in ERC20 list (check for mFactor and symbol) * @param _erc20Address - Address to be checked */ modifier inErc20List(address _erc20Address) { require( erc20Map[_erc20Address].mFactor != 0 || bytes(erc20Map[_erc20Address].symbol).length != 0, "Not in ERC20 list" ); _; } /** * INTERNAL FUNCTIONS */ /** * @dev This function will check the array for an element and retun the index * @param _inputAddress - Address for which the index has to be found * @param _inputAddressList - The address list to be checked * @return index - Index element indicating the position of the inputAddress inside the array * @return isFound - Boolean indicating if the element is present in the array or not * Access Control: This contract or derived contract */ function getIndex(address _inputAddress, address[] memory _inputAddressList) internal pure returns (uint256 index, bool isFound) { // Enter loop for (uint256 i = 0; i < _inputAddressList.length; i++) { // If value matches, return index if (_inputAddress == _inputAddressList[i]) { return (i, true); } } // If no value matches, return false return (0, false); } /** * GENERAL FUNCTIONS */ /** * @dev This function will set interest rate for the tenure in days * @param _tenure - Tenure of the agreement in days * @param _interestRate - Interest rate in 10 power 6 (If 5%, then value is 0.05 * 10 power 6) * @return - Boolean status - True indicating successful completion * Access Control: Only Owner */ function setInterest(uint256 _tenure, uint64 _interestRate) public onlyOwner() returns (bool) { tenureApyMap[_tenure] = _interestRate; return true; } /** * @dev This function will set value based on ParamType * @param _parameter - Enum value indicating ParamType (0,1,2,3) * @param _value - Value to be set * @return - Boolean status - True indicating successful completion * Access Control: Only Owner */ function setParamType(ParamType _parameter, uint256 _value) public onlyOwner() returns (bool) { if (_parameter == ParamType.ContractFee) { contractFee = uint64(_value); } else if (_parameter == ParamType.MinEarlyRedeemFee) { require( uint64(_value) <= maxEarlyRedeemFee, "Greater than max redeem fee" ); minEarlyRedeemFee = uint64(_value); } else if (_parameter == ParamType.MaxEarlyRedeemFee) { require( uint64(_value) >= minEarlyRedeemFee, "Less than min redeem fee" ); maxEarlyRedeemFee = uint64(_value); } else if (_parameter == ParamType.TotalAllocatedMxx) { require( _value >= mxxMintedFromContract, "Less than total mxx minted" ); totalAllocatedMxx = _value; } } /** * SUPPORTED ERC20 ADDRESS FUNCTIONS */ /** * @dev Adds a supported ERC20 address into the contract * @param _erc20Address - Address of the ERC20 contract * @param _mFactor - Mint Factor of the token (value of 1 token in USD * 10 power 18) * @return - Boolean status - True indicating successful completion * @notice - Access control: Only Owner */ function addErc20(address _erc20Address, uint256 _mFactor) public onlyOwner() onlyErc20OrEth(_erc20Address) returns (bool) { // Check for existing contracts and validity. If condition fails, revert require( erc20Map[_erc20Address].noContracts == 0, "Token has existing contracts" ); require(!erc20Map[_erc20Address].isValid, "Token already available"); // Add token details and return true // If _erc20Address = ZERO_ADDRESS then it is ETH else ERC20 erc20Map[_erc20Address] = Erc20Details( (_erc20Address == ZERO_ADDRESS) ? "ETH" : ERC20(_erc20Address).symbol(), true, 0, _mFactor ); erc20List.push(_erc20Address); return true; } /** * @dev Adds a list of supported ERC20 addresses into the contract * @param _erc20AddressList - List of addresses of the ERC20 contract * @param _mFactorList - List of mint factors of the token * @return - Boolean status - True indicating successful completion * @notice - The length of _erc20AddressList and _mFactorList must be the same * @notice - Access control: Only Owner */ function addErc20List( address[] memory _erc20AddressList, uint256[] memory _mFactorList ) public onlyOwner() returns (bool) { // Check if the length of 2 input arrays are the same else throw require( _erc20AddressList.length == _mFactorList.length, "Inconsistent Inputs" ); // Enter loop and token details for (uint256 i = 0; i < _erc20AddressList.length; i++) { addErc20(_erc20AddressList[i], _mFactorList[i]); } return true; } /** * @dev Removes a valid ERC20 addresses from the contract * @param _erc20Address - Address of the ERC20 contract to be removed * @return - Boolean status - True indicating successful completion * @notice - Access control: Only Owner */ function removeErc20(address _erc20Address) public onlyOwner() returns (bool) { // Check if Valid ERC20 not equals MXX_ADDRESS require(_erc20Address != MXX_ADDRESS, "Cannot remove MXX"); // Check if _erc20Address has existing yield contracts require( erc20Map[_erc20Address].noContracts == 0, "Token has existing contracts" ); // Get array index and isFound flag uint256 index; bool isFound; (index, isFound) = getIndex(_erc20Address, erc20List); // Require address to be in list require(isFound, "Address not found"); // Get last valid ERC20 address in the array address lastErc20Address = erc20List[erc20List.length - 1]; // Assign last address to the index position erc20List[index] = lastErc20Address; // Delete last address from the array erc20List.pop(); // Delete ERC20 details for the input address delete erc20Map[_erc20Address]; return true; } /** * @dev Enlists/Delists ERC20 address to prevent adding new yield contracts with this ERC20 collateral * @param _erc20Address - Address of the ERC20 contract * @param _isValid - New validity boolean of the ERC20 contract * @return - Boolean status - True indicating successful completion * @notice - Access control: Only Owner */ function setErc20Validity(address _erc20Address, bool _isValid) public onlyOwner() inErc20List(_erc20Address) returns (bool) { // Set valid ERC20 validity erc20Map[_erc20Address].isValid = _isValid; return true; } /** * @dev Updates the mint factor of a coin/token * @param _erc20Address - Address of the ERC20 contract or ETH address (ZERO_ADDRESS) * @return - Boolean status - True indicating successful completion * @notice - Access control: Only Owner */ function updateMFactor(address _erc20Address, uint256 _mFactor) public onlyOwner() inErc20List(_erc20Address) onlyErc20OrEth(_erc20Address) returns (bool) { // Update mint factor erc20Map[_erc20Address].mFactor = _mFactor; return true; } /** * @dev Updates the mint factor for list of coin(s)/token(s) * @param _erc20AddressList - List of ERC20 addresses * @param _mFactorList - List of mint factors for ERC20 addresses * @return - Boolean status - True indicating successful completion * @notice - Length of the 2 input arrays must be the same * @notice - Access control: Only Owner */ function updateMFactorList( address[] memory _erc20AddressList, uint256[] memory _mFactorList ) public onlyOwner() returns (bool) { // Length of the 2 input arrays must be the same. If condition fails, revert require( _erc20AddressList.length == _mFactorList.length, "Inconsistent Inputs" ); // Enter the loop, update and return true for (uint256 i = 0; i < _erc20AddressList.length; i++) { updateMFactor(_erc20AddressList[i], _mFactorList[i]); } return true; } /** * @dev Returns number of valid Tokens/Coins supported * @return - Number of valid tokens/coins * @notice - Access control: Public */ function getNoOfErc20s() public view returns (uint256) { return (erc20List.length); } /** * @dev Returns subset list of valid ERC20 contracts * @param _start - Start index to search in the list * @param _end - End index to search in the list * @return - List of valid ERC20 addresses subset * @notice - Access control: Public */ function getSubsetErc20List(uint256 _start, uint256 _end) public view returns (address[] memory) { // If _end higher than length of array, set end index to last element of the array if (_end >= erc20List.length) { _end = erc20List.length - 1; } // Check conditions else fail require(_start <= _end, "Invalid limits"); // Define return array uint256 noOfElements = _end - _start + 1; address[] memory subsetErc20List = new address[](noOfElements); // Loop in and add elements from erc20List array for (uint256 i = _start; i <= _end; i++) { subsetErc20List[i - _start] = erc20List[i]; } return subsetErc20List; } /** * YIELD CONTRACT FUNCTIONS */ /** * @dev Creates a yield contract * @param _erc20Address - The address of the ERC20 token (ZERO_ADDRESS if ETH) * @param _collateral - The collateral value of the ERC20 token or ETH * @param _tenure - The number of days of the agreement * @notice - Collateral to be input - Actual value * (10 power decimals) * @notice - For e.g If collateral is 5 USDT (Tether) and decimal is 6, then _collateral is (5 * (10 power 6)) * Non Reentrant modifier is used to prevent re-entrancy attack * @notice - Access control: External */ function createYieldContract( address _erc20Address, uint256 _collateral, uint16 _tenure ) external payable nonReentrant() { // Check if token/ETH is approved to create contracts require(erc20Map[_erc20Address].isValid, "Token/Coin not approved"); // Create contractId and check if status Inactive (enum state 0) bytes32 contractId = keccak256( abi.encode(msg.sender, _erc20Address, now, allContracts.length) ); require( contractMap[contractId].contractStatus == Status.Inactive, "Contract already exists" ); // Check if APY (interest rate is not zero for the tenure) require(tenureApyMap[_tenure] != 0, "No interest rate is set"); // Get decimal value for collaterals uint256 collateralDecimals; // Check id collateral is not 0 require(_collateral != 0, "Collateral is 0"); if (_erc20Address == ZERO_ADDRESS) { // In case of ETH, check to ensure if collateral value match ETH sent require(msg.value == _collateral, "Incorrect funds"); // ETH decimals is 18 collateralDecimals = 10**18; } else { // In case of non ETH, check to ensure if msg.value is 0 require(msg.value == 0, "Incorrect funds"); collateralDecimals = 10**uint256(ERC20(_erc20Address).decimals()); // Transfer collateral ERC20(_erc20Address).safeTransferFrom( msg.sender, address(this), _collateral ); } // Calculate MXX to be Minted uint256 numerator = _collateral .mul(erc20Map[_erc20Address].mFactor) .mul(tenureApyMap[_tenure]) .mul(10**uint256(ERC20(MXX_ADDRESS).decimals())) .mul(_tenure); uint256 denominator = collateralDecimals .mul(erc20Map[MXX_ADDRESS].mFactor) .mul(365 * POW6); uint256 valueToBeMinted = numerator.div(denominator); // Update total MXX minted from yield contracts mxxMintedFromContract = mxxMintedFromContract.add(valueToBeMinted); // Check the MXX to be minted will result in total MXX allocated for creating yield contracts require( totalAllocatedMxx >= mxxMintedFromContract, "Total allocated MXX exceeded" ); // Calculate MXX to be burnt numerator = valueToBeMinted.mul(contractFee); denominator = POW6; uint256 valueToBeBurnt = numerator.div(denominator); // Send valueToBeBurnt to contract fee destination ERC20(MXX_ADDRESS).safeTransferFrom( msg.sender, BURN_ADDRESS, valueToBeBurnt ); // Create contract contractMap[contractId] = ContractDetails( msg.sender, uint48(now), uint48(now.add(uint256(_tenure).mul(1 days))), _erc20Address, _tenure, tenureApyMap[_tenure], Status.Active, _collateral, valueToBeMinted ); // Push to all contracts and user contracts allContracts.push(contractId); // Increase number of contracts ERC20 details erc20Map[_erc20Address].noContracts += 1; } /** * @dev Early Redeem a yield contract * @param _contractId - The Id of the contract * Non Reentrant modifier is used to prevent re-entrancy attack * @notice - Access control: External */ function earlyRedeemContract(bytes32 _contractId) external nonReentrant() { // Check if contract is Active require( contractMap[_contractId].contractStatus == Status.Active, "Contract is not active" ); // Check if redeemer is the owner require( contractMap[_contractId].contractOwner == msg.sender, "Redeemer is not owner" ); // Check if current time is less than end time require( now < contractMap[_contractId].endTime, "Contract is beyond its end time" ); // Calculate mxxMintedTillDate uint256 numerator = now.sub(contractMap[_contractId].startTime).mul( contractMap[_contractId].mxxToBeMinted ); uint256 denominator = uint256(contractMap[_contractId].endTime).sub( contractMap[_contractId].startTime ); uint256 mxxMintedTillDate = numerator.div(denominator); // Calculate penaltyPercent numerator = uint256(maxEarlyRedeemFee).sub(minEarlyRedeemFee).mul( now.sub(contractMap[_contractId].startTime) ); uint256 penaltyPercent = uint256(maxEarlyRedeemFee).sub( numerator.div(denominator) ); // Calculate penaltyMXXToBurn numerator = penaltyPercent.mul(mxxMintedTillDate); uint256 penaltyMXXToBurn = numerator.div(POW6); // Check if penalty MXX to burn is not 0 require(penaltyMXXToBurn != 0, "No penalty MXX"); // Calculate mxxToBeSent uint256 mxxToBeSent = mxxMintedTillDate.sub(penaltyMXXToBurn); // Return collateral if (contractMap[_contractId].tokenAddress == ZERO_ADDRESS) { // Send back ETH (bool success, ) = contractMap[_contractId].contractOwner.call{ value: contractMap[_contractId].collateral }(""); require(success, "Transfer failed"); } else { // Send back ERC20 collateral ERC20(contractMap[_contractId].tokenAddress).safeTransfer( contractMap[_contractId].contractOwner, contractMap[_contractId].collateral ); } // Return MXX ERC20(MXX_ADDRESS).safeTransfer( contractMap[_contractId].contractOwner, mxxToBeSent ); // Burn penalty fee ERC20(MXX_ADDRESS).safeTransfer(BURN_ADDRESS, penaltyMXXToBurn); // Updating contract contractMap[_contractId].startTime = uint48(now); contractMap[_contractId].mxxToBeMinted = contractMap[_contractId] .mxxToBeMinted .sub(mxxMintedTillDate); contractMap[_contractId].contractOwner = ZERO_ADDRESS; contractMap[_contractId].contractStatus = Status.OpenMarket; } /** * @dev Acquire a yield contract in the open market * @param _contractId - The Id of the contract * Non Reentrant modifier is used to prevent re-entrancy attack * @notice - Access control: External */ function acquireYieldContract(bytes32 _contractId) external payable nonReentrant() { // Check if contract is open require( contractMap[_contractId].contractStatus == Status.OpenMarket, "Contract not in open market" ); // Get collateral in case of ERC20 tokens, for ETH it is already received via msg.value if (contractMap[_contractId].tokenAddress != ZERO_ADDRESS) { // In case of ERC20, ensure no ETH is sent require(msg.value == 0, "ETH should not be sent"); ERC20(contractMap[_contractId].tokenAddress).safeTransferFrom( msg.sender, address(this), contractMap[_contractId].collateral ); } else { // In case of ETH check if money received equals the collateral else revert require( msg.value == contractMap[_contractId].collateral, "Incorrect funds" ); } // Updating contract contractMap[_contractId].contractOwner = msg.sender; contractMap[_contractId].contractStatus = Status.Active; } /** * @dev Destroy an open market yield contract * @param _contractId - The Id of the contract * Non Reentrant modifier is used to prevent re-entrancy attack * @notice - Access control: External */ function destroyOMContract(bytes32 _contractId) external onlyOwner() nonReentrant() { // Check if contract is open require( contractMap[_contractId].contractStatus == Status.OpenMarket, "Contract not in open market" ); // Reduced MXX minted from contract and update status as destroyed mxxMintedFromContract -= contractMap[_contractId].mxxToBeMinted; contractMap[_contractId].contractStatus = Status.Destroyed; } /** * @dev Claim a yield contract in the active market * @param _contractId - The Id of the contract * Non Reentrant modifier is used to prevent re-entrancy attack * @notice - Access control: External */ function claimYieldContract(bytes32 _contractId) external nonReentrant() { // Check if contract is active require( contractMap[_contractId].contractStatus == Status.Active, "Contract is not active" ); // Check if owner and msg.sender are the same require( contractMap[_contractId].contractOwner == msg.sender, "Contract owned by someone else" ); // Check if current time is greater than contract end time require(now >= contractMap[_contractId].endTime, "Too early to claim"); // Return collateral if (contractMap[_contractId].tokenAddress == ZERO_ADDRESS) { // Send back ETH (bool success, ) = contractMap[_contractId].contractOwner.call{ value: contractMap[_contractId].collateral }(""); require(success, "Transfer failed"); } else { // Send back ERC20 collateral ERC20(contractMap[_contractId].tokenAddress).safeTransfer( contractMap[_contractId].contractOwner, contractMap[_contractId].collateral ); } // Return minted MXX ERC20(MXX_ADDRESS).safeTransfer( contractMap[_contractId].contractOwner, contractMap[_contractId].mxxToBeMinted ); // Updating contract contractMap[_contractId].contractStatus = Status.Claimed; // Reduce no of contracts in ERC20 details erc20Map[contractMap[_contractId].tokenAddress].noContracts -= 1; } /** * @dev This function will subset of yield contract * @param _start - Start of the list * @param _end - End of the list * @return - List of subset yield contract * Access Control: Public */ function getSubsetYieldContracts(uint256 _start, uint256 _end) public view returns (bytes32[] memory) { // If _end higher than length of array, set end index to last element of the array if (_end >= allContracts.length) { _end = allContracts.length.sub(1); } // Check conditions else fail require(_start <= _end, "Invalid limits"); // Define return array uint256 noOfElements = _end.sub(_start).add(1); bytes32[] memory subsetYieldContracts = new bytes32[](noOfElements); // Loop in and add elements from allContracts array for (uint256 i = _start; i <= _end; i++) { subsetYieldContracts[i - _start] = allContracts[i]; } return subsetYieldContracts; } /** * @dev This function will withdraw MXX back to the owner * @param _amount - Amount of MXX need to withdraw * @return - Boolean status indicating successful completion * Access Control: Only Owner */ function withdrawMXX(uint256 _amount) public onlyOwner() nonReentrant() returns (bool) { ERC20(MXX_ADDRESS).safeTransfer(msg.sender, _amount); return true; } } contract ERC20 is Context, IERC20 { using SafeMath for uint256; using Address for address; mapping (address => uint256) private _balances; mapping (address => mapping (address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; uint8 private _decimals; /** * @dev Sets the values for {name} and {symbol}, initializes {decimals} with * a default value of 18. * * To select a different value for {decimals}, use {_setupDecimals}. * * All three of these values are immutable: they can only be set once during * construction. */ constructor (string memory name, string memory symbol) public { _name = name; _symbol = symbol; _decimals = 18; } /** * @dev Returns the name of the token. */ function name() public view returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5,05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is * called. * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view returns (uint8) { return _decimals; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `recipient` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address recipient, uint256 amount) public virtual override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { _approve(_msgSender(), spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}; * * Requirements: * - `sender` and `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. * - the caller must have allowance for ``sender``'s tokens of at least * `amount`. */ function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) { _transfer(sender, recipient, amount); _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance")); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue)); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero")); return true; } /** * @dev Moves tokens `amount` from `sender` to `recipient`. * * This is internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `sender` cannot be the zero address. * - `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. */ function _transfer(address sender, address recipient, uint256 amount) internal virtual { require(sender != address(0), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(sender, recipient, amount); _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance"); _balances[recipient] = _balances[recipient].add(amount); emit Transfer(sender, recipient, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements * * - `to` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply = _totalSupply.add(amount); _balances[account] = _balances[account].add(amount); emit Transfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance"); _totalSupply = _totalSupply.sub(amount); emit Transfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens. * * This is internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve(address owner, address spender, uint256 amount) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Sets {decimals} to a value other than the default one of 18. * * WARNING: This function should only be called from the constructor. Most * applications that interact with token contracts will not expect * {decimals} to ever change, and may work incorrectly if it does. */ function _setupDecimals(uint8 decimals_) internal { _decimals = decimals_; } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be to transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { } }

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{"success": true, "error": null, "results": {"detectors": [{"check": "reentrancy-eth", "impact": "High", "confidence": "Medium"}, {"check": "write-after-write", "impact": "Medium", "confidence": "High"}, {"check": "divide-before-multiply", "impact": "Medium", "confidence": "Medium"}, {"check": "reentrancy-no-eth", "impact": "Medium", "confidence": "Medium"}]}}

0x748e57656d093aa1bbcde2900092a87110c1c079

pragma solidity 0.4.26; interface tokenRecipient { function receiveApproval(address _from, uint256 _value, address _token, bytes _extraData) public; } contract TokenERC20 { string public name; string public symbol; uint8 public decimals = 18; uint256 public totalSupply; // ��mapping����ÿ����ַ��Ӧ����� mapping (address => uint256) public balanceOf; // �洢���˺ŵĿ��� mapping (address => mapping (address => uint256)) public allowance; // �¼�������֪ͨ�ͻ��˽��׷��� event Transfer(address indexed from, address indexed to, uint256 value); // �¼�������֪ͨ�ͻ��˴��ұ����� event Burn(address indexed from, uint256 value); /* *��ʼ������ */ function TokenERC20(uint256 initialSupply, string tokenName, string tokenSymbol) public { totalSupply = initialSupply * 10 ** uint256(decimals); // ��Ӧ�ķݶ�ݶ����С�Ĵ��ҵ�λ�йأ��ݶ� = �� balanceOf[msg.sender] = totalSupply; // ������ӵ�����еĴ��� name = tokenName; // �������� symbol = tokenSymbol; // ���ҷ��� } } interface tokenRecipient { function receiveApproval(address _from, uint256 _value, address _token, bytes _extraData) public; } contract TokenERC20 { string public name; string public symbol; uint8 public decimals = 18; uint256 public totalSupply; // ��mapping����ÿ����ַ��Ӧ����� mapping (address => uint256) public balanceOf; // �洢���˺ŵĿ��� mapping (address => mapping (address => uint256)) public allowance; // �¼�������֪ͨ�ͻ��˽��׷��� event Transfer(address indexed from, address indexed to, uint256 value); // �¼�������֪ͨ�ͻ��˴��ұ����� event Burn(address indexed from, uint256 value); /* *��ʼ������ */ function TokenERC20(uint256 initialSupply, string tokenName, string tokenSymbol) public { totalSupply = initialSupply * 10 ** uint256(decimals); // ��Ӧ�ķݶ�ݶ����С�Ĵ��ҵ�λ�йأ��ݶ� = �� balanceOf[msg.sender] = totalSupply; // ������ӵ�����еĴ��� name = tokenName; // �������� symbol = tokenSymbol; // ���ҷ��� } //���ҽ���ת�Ƶ��ڲ�ʵ�� function _transfer(address _from, address _to, uint _value) internal { // ȷ��Ŀ���ַ��Ϊ0x0����Ϊ0x0��ַ�������� require(_to != 0x0); // ��鷢������� require(balanceOf[_from] >= _value); // ȷ��ת��Ϊ������ require(balanceOf[_to] + _value > balanceOf[_to]); // ����������齻�ף� uint previousBalances = balanceOf[_from] + balanceOf[_to]; // Subtract from the sender balanceOf[_from] -= _value; // Add the same to the recipient balanceOf[_to] += _value; Transfer(_from, _to, _value); // ��assert���������߼��� assert(balanceOf[_from] + balanceOf[_to] == previousBalances); } /***** **���ҽ���ת�� **���Լ������������ߣ��˺ŷ���`_value`�����ҵ� `_to`�˺� **@param _to �����ߵ�ַ **@param _value ת������ **/ function transfer(address _to, uint256 _value) public { _transfer(msg.sender, _to, _value); } /***** **�˺�֮����ҽ���ת�� **@param _from �����ߵ�ַ **@param _to �����ߵ�ַ **@param _value ת������ **/ function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) { require(_value <= allowance[_from][msg.sender]); // Check allowance allowance[_from][msg.sender] -= _value; _transfer(_from, _to, _value); return true; } /***** **����ij����ַ����Լ�����Դ������������廨�ѵĴ����� **���������`_spender` ���Ѳ����� `_value` ������ **@param _spender The address authorized to spend **@param _value the max amount they can spend **/ function approve(address _spender, uint256 _value) public returns (bool success) { allowance[msg.sender][_spender] = _value; return true; } /***** **��������һ����ַ����Լ�����ң����������ߣ����������໨�ѵĴ����� **@param _spender ����Ȩ�ĵ�ַ����Լ�� **@param _value ���ɻ��Ѵ����� **@param _extraData ���͸���Լ�ĸ������� **/ function approveAndCall(address _spender, uint256 _value, bytes _extraData) public returns (bool success) { tokenRecipient spender = tokenRecipient(_spender); if (approve(_spender, _value)) { // ֪ͨ��Լ spender.receiveApproval(msg.sender, _value, this, _extraData); return true; } } ///�����ң����������ߣ��˻���ָ�������� function burn(uint256 _value) public returns (bool success) { require(balanceOf[msg.sender] >= _value); // Check if the sender has enough balanceOf[msg.sender] -= _value; // Subtract from the sender totalSupply -= _value; // Updates totalSupply Burn(msg.sender, _value); return true; } /***** **�����û��˻���ָ�������� **Remove `_value` tokens from the system irreversibly on behalf of `_from **@param _from the address of the sender **@param _value the amount of money to burn **/ function burnFrom(address _from, uint256 _value) public returns (bool success) { require(balanceOf[_from] >= _value); // Check if the targeted balance is enough require(_value <= allowance[_from][msg.sender]); // Check allowance balanceOf[_from] -= _value; // Subtract from the targeted balance allowance[_from][msg.sender] -= _value; // Subtract from the sender's allowance totalSupply -= _value; // Update totalSupply Burn(_from, _value); return true; } } pragma solidity ^0.4.19; contract Token { /// token������Ĭ�ϻ�Ϊpublic��������һ��getter�����ӿڣ�����ΪtotalSupply(). uint256 public totalSupply; /// ��ȡ�˻�_ownerӵ��token������ function balanceOf(address _owner) constant returns (uint256 balance); //����Ϣ�������˻�����_to�˻�ת����Ϊ_value��token function transfer(address _to, uint256 _value) returns (bool success); //���˻�_from�����˻�_toת����Ϊ_value��token����approve�������ʹ�� function transferFrom(address _from, address _to, uint256 _value) returns (bool success); //��Ϣ�����˻������˻�_spender�ܴӷ����˻���ת������Ϊ_value��token function approve(address _spender, uint256 _value) returns (bool success); //��ȡ�˻�_spender���Դ��˻�_owner��ת��token������ function allowance(address _owner, address _spender) constant returns (uint256 remaining); //����ת��ʱ����Ҫ�������¼� event Transfer(address indexed _from, address indexed _to, uint256 _value); alue)�ɹ�ִ��ʱ���봥�����¼� event Approval(address indexed _owner, address indexed _spender, uint256 _value); }

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{"success": true, "error": null, "results": {"detectors": [{"check": "erc20-interface", "impact": "Medium", "confidence": "High"}, {"check": "name-reused", "impact": "High", "confidence": "High"}]}}

0x74CCe5C64292419C64bF0fbb71A4a1B7F9d89a3E

pragma solidity 0.6.12; abstract contract Context { function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } interface ICommittee { event CommitteeChange(address indexed addr, uint256 weight, bool certification, bool inCommittee); event CommitteeSnapshot(address[] addrs, uint256[] weights, bool[] certification); // No external functions /* * External functions */ /// @dev Called by: Elections contract /// Notifies a weight change of certification change of a member function memberWeightChange(address addr, uint256 weight) external /* onlyElectionsContract onlyWhenActive */; function memberCertificationChange(address addr, bool isCertified) external /* onlyElectionsContract onlyWhenActive */; /// @dev Called by: Elections contract /// Notifies a a member removal for example due to voteOut / voteUnready function removeMember(address addr) external returns (bool memberRemoved, uint removedMemberEffectiveStake, bool removedMemberCertified)/* onlyElectionContract */; /// @dev Called by: Elections contract /// Notifies a new member applicable for committee (due to registration, unbanning, certification change) function addMember(address addr, uint256 weight, bool isCertified) external returns (bool memberAdded) /* onlyElectionsContract */; /// @dev Called by: Elections contract /// Checks if addMember() would add a the member to the committee function checkAddMember(address addr, uint256 weight) external view returns (bool wouldAddMember); /// @dev Called by: Elections contract /// Returns the committee members and their weights function getCommittee() external view returns (address[] memory addrs, uint256[] memory weights, bool[] memory certification); function getCommitteeStats() external view returns (uint generalCommitteeSize, uint certifiedCommitteeSize, uint totalStake); function getMemberInfo(address addr) external view returns (bool inCommittee, uint weight, bool isCertified, uint totalCommitteeWeight); function emitCommitteeSnapshot() external; /* * Governance functions */ event MaxCommitteeSizeChanged(uint8 newValue, uint8 oldValue); function setMaxCommitteeSize(uint8 maxCommitteeSize) external /* onlyFunctionalManager onlyWhenActive */; function getMaxCommitteeSize() external view returns (uint8); } interface IContractRegistry { event ContractAddressUpdated(string contractName, address addr, bool managedContract); event ManagerChanged(string role, address newManager); event ContractRegistryUpdated(address newContractRegistry); /* * External functions */ /// @dev updates the contracts address and emits a corresponding event /// managedContract indicates whether the contract is managed by the registry and notified on changes function setContract(string calldata contractName, address addr, bool managedContract) external /* onlyAdmin */; /// @dev returns the current address of the given contracts function getContract(string calldata contractName) external view returns (address); /// @dev returns the list of contract addresses managed by the registry function getManagedContracts() external view returns (address[] memory); function setManager(string calldata role, address manager) external /* onlyAdmin */; function getManager(string calldata role) external view returns (address); function lockContracts() external /* onlyAdmin */; function unlockContracts() external /* onlyAdmin */; function setNewContractRegistry(IContractRegistry newRegistry) external /* onlyAdmin */; function getPreviousContractRegistry() external view returns (address); } interface IFeesAndBootstrapRewards { event FeesAssigned(address indexed guardian, uint256 amount); event FeesWithdrawn(address indexed guardian, uint256 amount); event BootstrapRewardsAssigned(address indexed guardian, uint256 amount); event BootstrapRewardsWithdrawn(address indexed guardian, uint256 amount); /* * External functions */ /// @dev called by the Committee contract upon expected change in the committee membership of the guardian /// Triggers update of the member rewards function committeeMembershipWillChange(address guardian, bool inCommittee, bool isCertified, bool nextCertification, uint generalCommitteeSize, uint certifiedCommitteeSize) external /* onlyCommitteeContract */; function getFeesAndBootstrapBalance(address guardian) external view returns ( uint256 feeBalance, uint256 bootstrapBalance ); /// @dev Transfer all of msg.sender's outstanding balance to their account function withdrawFees(address guardian) external; /// @dev Transfer all of msg.sender's outstanding balance to their account function withdrawBootstrapFunds(address guardian) external; /// @dev Returns the global Fees and Bootstrap rewards state function getFeesAndBootstrapState() external view returns ( uint256 certifiedFeesPerMember, uint256 generalFeesPerMember, uint256 certifiedBootstrapPerMember, uint256 generalBootstrapPerMember, uint256 lastAssigned ); function getFeesAndBootstrapData(address guardian) external view returns ( uint256 feeBalance, uint256 lastFeesPerMember, uint256 bootstrapBalance, uint256 lastBootstrapPerMember ); /* * Governance */ event GeneralCommitteeAnnualBootstrapChanged(uint256 generalCommitteeAnnualBootstrap); event CertifiedCommitteeAnnualBootstrapChanged(uint256 certifiedCommitteeAnnualBootstrap); event RewardDistributionActivated(uint256 startTime); event RewardDistributionDeactivated(); event FeesAndBootstrapRewardsBalanceMigrated(address indexed guardian, uint256 fees, uint256 bootstrapRewards, address toRewardsContract); event FeesAndBootstrapRewardsBalanceMigrationAccepted(address from, address indexed guardian, uint256 fees, uint256 bootstrapRewards); event EmergencyWithdrawal(address addr); /// @dev deactivates reward distribution, all rewards will be distributed up /// deactivate moment. function deactivateRewardDistribution() external /* onlyMigrationManager */; /// @dev activates reward distribution, all rewards will be distributed up /// assuming the last assignment was on startTime (the time the old contarct was deactivated) function activateRewardDistribution(uint startTime) external /* onlyInitializationAdmin */; /// @dev Returns the contract's settings function getSettings() external view returns ( uint generalCommitteeAnnualBootstrap, uint certifiedCommitteeAnnualBootstrap, bool rewardAllocationActive ); function getGeneralCommitteeAnnualBootstrap() external view returns (uint256); /// @dev Assigns rewards and sets a new monthly rate for the geenral commitee bootstrap. function setGeneralCommitteeAnnualBootstrap(uint256 annual_amount) external /* onlyFunctionalManager */; function getCertifiedCommitteeAnnualBootstrap() external view returns (uint256); /// @dev Assigns rewards and sets a new monthly rate for the certification commitee bootstrap. function setCertifiedCommitteeAnnualBootstrap(uint256 annual_amount) external /* onlyFunctionalManager */; function isRewardAllocationActive() external view returns (bool); /// @dev migrates the staking rewards balance of the guardian to the rewards contract as set in the registry. function migrateRewardsBalance(address guardian) external; /// @dev accepts guardian's balance migration from a previous rewards contarct. function acceptRewardsBalanceMigration(address guardian, uint256 fees, uint256 bootstrapRewards) external; /// @dev emergency withdrawal of the rewards contract balances, may eb called only by the EmergencyManager. function emergencyWithdraw() external; /* onlyMigrationManager */ } interface ILockable { event Locked(); event Unlocked(); function lock() external /* onlyLockOwner */; function unlock() external /* onlyLockOwner */; function isLocked() view external returns (bool); } interface IStakingRewards { event DelegatorStakingRewardsAssigned(address indexed delegator, uint256 amount, uint256 totalAwarded, address guardian, uint256 delegatorRewardsPerToken); event GuardianStakingRewardsAssigned(address indexed guardian, uint256 amount, uint256 totalAwarded, uint256 delegatorRewardsPerToken, uint256 stakingRewardsPerWeight); event StakingRewardsClaimed(address indexed addr, uint256 claimedDelegatorRewards, uint256 claimedGuardianRewards, uint256 totalClaimedDelegatorRewards, uint256 totalClaimedGuardianRewards); event StakingRewardsAllocated(uint256 allocatedRewards, uint256 stakingRewardsPerWeight); event GuardianDelegatorsStakingRewardsPercentMilleUpdated(address indexed guardian, uint256 delegatorsStakingRewardsPercentMille); /* * External functions */ /// @dev Returns the currently unclaimed orbs token reward balance of the given address. function getStakingRewardsBalance(address addr) external view returns (uint256 balance); /// @dev Allows Guardian to set a different delegator staking reward cut than the default /// delegatorRewardsPercentMille accepts values between 0 - maxDelegatorsStakingRewardsPercentMille function setGuardianDelegatorsStakingRewardsPercentMille(uint32 delegatorRewardsPercentMille) external; /// @dev Returns the guardian's delegatorRewardsPercentMille function getGuardianDelegatorsStakingRewardsPercentMille(address guardian) external view returns (uint256 delegatorRewardsRatioPercentMille); /// @dev Claims the staking rewards balance of addr by staking function claimStakingRewards(address addr) external; /// @dev Returns the amount of ORBS tokens in the staking wallet that were allocated /// but not yet claimed. The staking wallet balance must always larger than the allocated value. function getStakingRewardsWalletAllocatedTokens() external view returns (uint256 allocated); function getGuardianStakingRewardsData(address guardian) external view returns ( uint256 balance, uint256 claimed, uint256 delegatorRewardsPerToken, uint256 lastStakingRewardsPerWeight ); function getDelegatorStakingRewardsData(address delegator) external view returns ( uint256 balance, uint256 claimed, uint256 lastDelegatorRewardsPerToken ); function getStakingRewardsState() external view returns ( uint96 stakingRewardsPerWeight, uint96 unclaimedStakingRewards ); function getCurrentStakingRewardsRatePercentMille() external returns (uint256); /// @dev called by the Committee contract upon expected change in the committee membership of the guardian /// Triggers update of the member rewards function committeeMembershipWillChange(address guardian, uint256 weight, uint256 totalCommitteeWeight, bool inCommittee, bool inCommitteeAfter) external /* onlyCommitteeContract */; /// @dev called by the Delegation contract upon expected change in a committee member delegator stake /// Triggers update of the delegator and guardian staking rewards function delegationWillChange(address guardian, uint256 delegatedStake, address delegator, uint256 delegatorStake, address nextGuardian, uint256 nextGuardianDelegatedStake) external /* onlyDelegationsContract */; /* * Governance functions */ event AnnualStakingRewardsRateChanged(uint256 annualRateInPercentMille, uint256 annualCap); event DefaultDelegatorsStakingRewardsChanged(uint32 defaultDelegatorsStakingRewardsPercentMille); event MaxDelegatorsStakingRewardsChanged(uint32 maxDelegatorsStakingRewardsPercentMille); event RewardDistributionActivated(uint256 startTime); event RewardDistributionDeactivated(); event StakingRewardsBalanceMigrated(address indexed addr, uint256 guardianStakingRewards, uint256 delegatorStakingRewards, address toRewardsContract); event StakingRewardsBalanceMigrationAccepted(address from, address indexed addr, uint256 guardianStakingRewards, uint256 delegatorStakingRewards); event EmergencyWithdrawal(address addr); /// @dev activates reward distribution, all rewards will be distributed up /// assuming the last assignment was on startTime (the time the old contarct was deactivated) function activateRewardDistribution(uint startTime) external /* onlyInitializationAdmin */; /// @dev deactivates reward distribution, all rewards will be distributed up /// deactivate moment. function deactivateRewardDistribution() external /* onlyMigrationManager */; /// @dev Sets the default cut of the delegators staking reward. function setDefaultDelegatorsStakingRewardsPercentMille(uint32 defaultDelegatorsStakingRewardsPercentMille) external /* onlyFunctionalManager onlyWhenActive */; function getDefaultDelegatorsStakingRewardsPercentMille() external view returns (uint32); /// @dev Sets the maximum cut of the delegators staking reward. function setMaxDelegatorsStakingRewardsPercentMille(uint32 maxDelegatorsStakingRewardsPercentMille) external /* onlyFunctionalManager onlyWhenActive */; function getMaxDelegatorsStakingRewardsPercentMille() external view returns (uint32); /// @dev Sets a new annual rate and cap for the staking reward. function setAnnualStakingRewardsRate(uint256 annualRateInPercentMille, uint256 annualCap) external /* onlyFunctionalManager */; function getAnnualStakingRewardsRatePercentMille() external view returns (uint32); function getAnnualStakingRewardsCap() external view returns (uint256); function isRewardAllocationActive() external view returns (bool); /// @dev Returns the contract's settings function getSettings() external view returns ( uint annualStakingRewardsCap, uint32 annualStakingRewardsRatePercentMille, uint32 defaultDelegatorsStakingRewardsPercentMille, uint32 maxDelegatorsStakingRewardsPercentMille, bool rewardAllocationActive ); /// @dev migrates the staking rewards balance of the guardian to the rewards contract as set in the registry. function migrateRewardsBalance(address guardian) external; /// @dev accepts guardian's balance migration from a previous rewards contarct. function acceptRewardsBalanceMigration(address guardian, uint256 guardianStakingRewards, uint256 delegatorStakingRewards) external; /// @dev emergency withdrawal of the rewards contract balances, may eb called only by the EmergencyManager. function emergencyWithdraw() external /* onlyMigrationManager */; } contract Initializable { address private _initializationAdmin; event InitializationComplete(); constructor() public{ _initializationAdmin = msg.sender; } modifier onlyInitializationAdmin() { require(msg.sender == initializationAdmin(), "sender is not the initialization admin"); _; } /* * External functions */ function initializationAdmin() public view returns (address) { return _initializationAdmin; } function initializationComplete() external onlyInitializationAdmin { _initializationAdmin = address(0); emit InitializationComplete(); } function isInitializationComplete() public view returns (bool) { return _initializationAdmin == address(0); } } library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } contract WithClaimableRegistryManagement is Context { address private _registryAdmin; address private _pendingRegistryAdmin; event RegistryManagementTransferred(address indexed previousRegistryAdmin, address indexed newRegistryAdmin); /** * @dev Initializes the contract setting the deployer as the initial registryRegistryAdmin. */ constructor () internal { address msgSender = _msgSender(); _registryAdmin = msgSender; emit RegistryManagementTransferred(address(0), msgSender); } /** * @dev Returns the address of the current registryAdmin. */ function registryAdmin() public view returns (address) { return _registryAdmin; } /** * @dev Throws if called by any account other than the registryAdmin. */ modifier onlyRegistryAdmin() { require(isRegistryAdmin(), "WithClaimableRegistryManagement: caller is not the registryAdmin"); _; } /** * @dev Returns true if the caller is the current registryAdmin. */ function isRegistryAdmin() public view returns (bool) { return _msgSender() == _registryAdmin; } /** * @dev Leaves the contract without registryAdmin. It will not be possible to call * `onlyManager` functions anymore. Can only be called by the current registryAdmin. * * NOTE: Renouncing registryManagement will leave the contract without an registryAdmin, * thereby removing any functionality that is only available to the registryAdmin. */ function renounceRegistryManagement() public onlyRegistryAdmin { emit RegistryManagementTransferred(_registryAdmin, address(0)); _registryAdmin = address(0); } /** * @dev Transfers registryManagement of the contract to a new account (`newManager`). */ function _transferRegistryManagement(address newRegistryAdmin) internal { require(newRegistryAdmin != address(0), "RegistryAdmin: new registryAdmin is the zero address"); emit RegistryManagementTransferred(_registryAdmin, newRegistryAdmin); _registryAdmin = newRegistryAdmin; } /** * @dev Modifier throws if called by any account other than the pendingManager. */ modifier onlyPendingRegistryAdmin() { require(msg.sender == _pendingRegistryAdmin, "Caller is not the pending registryAdmin"); _; } /** * @dev Allows the current registryAdmin to set the pendingManager address. * @param newRegistryAdmin The address to transfer registryManagement to. */ function transferRegistryManagement(address newRegistryAdmin) public onlyRegistryAdmin { _pendingRegistryAdmin = newRegistryAdmin; } /** * @dev Allows the _pendingRegistryAdmin address to finalize the transfer. */ function claimRegistryManagement() external onlyPendingRegistryAdmin { _transferRegistryManagement(_pendingRegistryAdmin); _pendingRegistryAdmin = address(0); } /** * @dev Returns the current pendingRegistryAdmin */ function pendingRegistryAdmin() public view returns (address) { return _pendingRegistryAdmin; } } contract ContractRegistryAccessor is WithClaimableRegistryManagement, Initializable { IContractRegistry private contractRegistry; constructor(IContractRegistry _contractRegistry, address _registryAdmin) public { require(address(_contractRegistry) != address(0), "_contractRegistry cannot be 0"); setContractRegistry(_contractRegistry); _transferRegistryManagement(_registryAdmin); } modifier onlyAdmin { require(isAdmin(), "sender is not an admin (registryManger or initializationAdmin)"); _; } function isManager(string memory role) internal view returns (bool) { IContractRegistry _contractRegistry = contractRegistry; return isAdmin() || _contractRegistry != IContractRegistry(0) && contractRegistry.getManager(role) == msg.sender; } function isAdmin() internal view returns (bool) { return msg.sender == registryAdmin() || msg.sender == initializationAdmin() || msg.sender == address(contractRegistry); } function getProtocolContract() internal view returns (address) { return contractRegistry.getContract("protocol"); } function getStakingRewardsContract() internal view returns (address) { return contractRegistry.getContract("stakingRewards"); } function getFeesAndBootstrapRewardsContract() internal view returns (address) { return contractRegistry.getContract("feesAndBootstrapRewards"); } function getCommitteeContract() internal view returns (address) { return contractRegistry.getContract("committee"); } function getElectionsContract() internal view returns (address) { return contractRegistry.getContract("elections"); } function getDelegationsContract() internal view returns (address) { return contractRegistry.getContract("delegations"); } function getGuardiansRegistrationContract() internal view returns (address) { return contractRegistry.getContract("guardiansRegistration"); } function getCertificationContract() internal view returns (address) { return contractRegistry.getContract("certification"); } function getStakingContract() internal view returns (address) { return contractRegistry.getContract("staking"); } function getSubscriptionsContract() internal view returns (address) { return contractRegistry.getContract("subscriptions"); } function getStakingRewardsWallet() internal view returns (address) { return contractRegistry.getContract("stakingRewardsWallet"); } function getBootstrapRewardsWallet() internal view returns (address) { return contractRegistry.getContract("bootstrapRewardsWallet"); } function getGeneralFeesWallet() internal view returns (address) { return contractRegistry.getContract("generalFeesWallet"); } function getCertifiedFeesWallet() internal view returns (address) { return contractRegistry.getContract("certifiedFeesWallet"); } function getStakingContractHandler() internal view returns (address) { return contractRegistry.getContract("stakingContractHandler"); } /* * Governance functions */ event ContractRegistryAddressUpdated(address addr); function setContractRegistry(IContractRegistry newContractRegistry) public onlyAdmin { require(newContractRegistry.getPreviousContractRegistry() == address(contractRegistry), "new contract registry must provide the previous contract registry"); contractRegistry = newContractRegistry; emit ContractRegistryAddressUpdated(address(newContractRegistry)); } function getContractRegistry() public view returns (IContractRegistry) { return contractRegistry; } } contract Lockable is ILockable, ContractRegistryAccessor { bool public locked; constructor(IContractRegistry _contractRegistry, address _registryAdmin) ContractRegistryAccessor(_contractRegistry, _registryAdmin) public {} modifier onlyLockOwner() { require(msg.sender == registryAdmin() || msg.sender == address(getContractRegistry()), "caller is not a lock owner"); _; } function lock() external override onlyLockOwner { locked = true; emit Locked(); } function unlock() external override onlyLockOwner { locked = false; emit Unlocked(); } function isLocked() external override view returns (bool) { return locked; } modifier onlyWhenActive() { require(!locked, "contract is locked for this operation"); _; } } contract ManagedContract is Lockable { constructor(IContractRegistry _contractRegistry, address _registryAdmin) Lockable(_contractRegistry, _registryAdmin) public {} modifier onlyMigrationManager { require(isManager("migrationManager"), "sender is not the migration manager"); _; } modifier onlyFunctionalManager { require(isManager("functionalManager"), "sender is not the functional manager"); _; } function refreshContracts() virtual external {} } contract Committee is ICommittee, ManagedContract { using SafeMath for uint256; using SafeMath for uint96; uint96 constant CERTIFICATION_MASK = 1 << 95; uint96 constant WEIGHT_MASK = ~CERTIFICATION_MASK; struct CommitteeMember { address addr; uint96 weightAndCertifiedBit; } CommitteeMember[] committee; struct MemberStatus { uint32 pos; bool inCommittee; } mapping(address => MemberStatus) public membersStatus; struct CommitteeStats { uint96 totalWeight; uint32 generalCommitteeSize; uint32 certifiedCommitteeSize; } CommitteeStats committeeStats; uint8 maxCommitteeSize; constructor(IContractRegistry _contractRegistry, address _registryAdmin, uint8 _maxCommitteeSize) ManagedContract(_contractRegistry, _registryAdmin) public { setMaxCommitteeSize(_maxCommitteeSize); } modifier onlyElectionsContract() { require(msg.sender == electionsContract, "caller is not the elections"); _; } /* * External functions */ function memberWeightChange(address addr, uint256 weight) external override onlyElectionsContract onlyWhenActive { MemberStatus memory status = membersStatus[addr]; if (!status.inCommittee) { return; } CommitteeMember memory member = committee[status.pos]; (uint prevWeight, bool isCertified) = getWeightCertification(member); committeeStats.totalWeight = uint96(committeeStats.totalWeight.sub(prevWeight).add(weight)); committee[status.pos].weightAndCertifiedBit = packWeightCertification(weight, isCertified); emit CommitteeChange(addr, weight, isCertified, true); } function memberCertificationChange(address addr, bool isCertified) external override onlyElectionsContract onlyWhenActive { MemberStatus memory status = membersStatus[addr]; if (!status.inCommittee) { return; } CommitteeMember memory member = committee[status.pos]; (uint weight, bool prevCertification) = getWeightCertification(member); CommitteeStats memory _committeeStats = committeeStats; feesAndBootstrapRewardsContract.committeeMembershipWillChange(addr, true, prevCertification, isCertified, _committeeStats.generalCommitteeSize, _committeeStats.certifiedCommitteeSize); committeeStats.certifiedCommitteeSize = _committeeStats.certifiedCommitteeSize - (prevCertification ? 1 : 0) + (isCertified ? 1 : 0); committee[status.pos].weightAndCertifiedBit = packWeightCertification(weight, isCertified); emit CommitteeChange(addr, weight, isCertified, true); } function addMember(address addr, uint256 weight, bool isCertified) external override onlyElectionsContract onlyWhenActive returns (bool memberAdded) { MemberStatus memory status = membersStatus[addr]; if (status.inCommittee) { return false; } (bool qualified, uint entryPos) = qualifiesToEnterCommittee(addr, weight, maxCommitteeSize); if (!qualified) { return false; } memberAdded = true; CommitteeStats memory _committeeStats = committeeStats; stakingRewardsContract.committeeMembershipWillChange(addr, weight, _committeeStats.totalWeight, false, true); feesAndBootstrapRewardsContract.committeeMembershipWillChange(addr, false, isCertified, isCertified, _committeeStats.generalCommitteeSize, _committeeStats.certifiedCommitteeSize); _committeeStats.generalCommitteeSize++; if (isCertified) _committeeStats.certifiedCommitteeSize++; _committeeStats.totalWeight = uint96(_committeeStats.totalWeight.add(weight)); CommitteeMember memory newMember = CommitteeMember({ addr: addr, weightAndCertifiedBit: packWeightCertification(weight, isCertified) }); if (entryPos < committee.length) { CommitteeMember memory removed = committee[entryPos]; unpackWeightCertification(removed.weightAndCertifiedBit); _committeeStats = removeMemberAtPos(entryPos, false, _committeeStats); committee[entryPos] = newMember; } else { committee.push(newMember); } status.inCommittee = true; status.pos = uint32(entryPos); membersStatus[addr] = status; committeeStats = _committeeStats; emit CommitteeChange(addr, weight, isCertified, true); } function checkAddMember(address addr, uint256 weight) external view override returns (bool wouldAddMember) { if (membersStatus[addr].inCommittee) { return false; } (bool qualified, ) = qualifiesToEnterCommittee(addr, weight, maxCommitteeSize); return qualified; } /// @dev Called by: Elections contract /// Notifies a a member removal for example due to voteOut / voteUnready function removeMember(address addr) external override onlyElectionsContract onlyWhenActive returns (bool memberRemoved, uint256 memberEffectiveStake, bool isCertified) { MemberStatus memory status = membersStatus[addr]; if (!status.inCommittee) { return (false, 0, false); } memberRemoved = true; (memberEffectiveStake, isCertified) = getWeightCertification(committee[status.pos]); committeeStats = removeMemberAtPos(status.pos, true, committeeStats); } /// @dev Called by: Elections contract /// Returns the committee members and their weights function getCommittee() external override view returns (address[] memory addrs, uint256[] memory weights, bool[] memory certification) { return _getCommittee(); } function emitCommitteeSnapshot() external override { (address[] memory addrs, uint256[] memory weights, bool[] memory certification) = _getCommittee(); for (uint i = 0; i < addrs.length; i++) { emit CommitteeChange(addrs[i], weights[i], certification[i], true); } emit CommitteeSnapshot(addrs, weights, certification); } /* * Governance functions */ function setMaxCommitteeSize(uint8 _maxCommitteeSize) public override onlyFunctionalManager { uint8 prevMaxCommitteeSize = maxCommitteeSize; maxCommitteeSize = _maxCommitteeSize; while (committee.length > _maxCommitteeSize) { (, ,uint pos) = _getMinCommitteeMember(); committeeStats = removeMemberAtPos(pos, true, committeeStats); } emit MaxCommitteeSizeChanged(_maxCommitteeSize, prevMaxCommitteeSize); } function getMaxCommitteeSize() external override view returns (uint8) { return maxCommitteeSize; } function getCommitteeStats() external override view returns (uint generalCommitteeSize, uint certifiedCommitteeSize, uint totalWeight) { CommitteeStats memory _committeeStats = committeeStats; return (_committeeStats.generalCommitteeSize, _committeeStats.certifiedCommitteeSize, _committeeStats.totalWeight); } function getMemberInfo(address addr) external override view returns (bool inCommittee, uint weight, bool isCertified, uint totalCommitteeWeight) { MemberStatus memory status = membersStatus[addr]; inCommittee = status.inCommittee; if (inCommittee) { (weight, isCertified) = getWeightCertification(committee[status.pos]); } totalCommitteeWeight = committeeStats.totalWeight; } /* * Private */ function packWeightCertification(uint256 weight, bool certification) private pure returns (uint96 weightAndCertified) { return uint96(weight) | (certification ? CERTIFICATION_MASK : 0); } function unpackWeightCertification(uint96 weightAndCertifiedBit) private pure returns (uint256 weight, bool certification) { return (uint256(weightAndCertifiedBit & WEIGHT_MASK), weightAndCertifiedBit & CERTIFICATION_MASK != 0); } function getWeightCertification(CommitteeMember memory member) private pure returns (uint256 weight, bool certification) { return unpackWeightCertification(member.weightAndCertifiedBit); } function _getCommittee() private view returns (address[] memory addrs, uint256[] memory weights, bool[] memory certification) { CommitteeMember[] memory _committee = committee; addrs = new address[](_committee.length); weights = new uint[](_committee.length); certification = new bool[](_committee.length); for (uint i = 0; i < _committee.length; i++) { addrs[i] = _committee[i].addr; (weights[i], certification[i]) = getWeightCertification(_committee[i]); } } function _getMinCommitteeMember() private view returns ( address minMemberAddress, uint256 minMemberWeight, uint minMemberPos ){ CommitteeMember[] memory _committee = committee; minMemberPos = uint256(-1); minMemberWeight = uint256(-1); uint256 memberWeight; address memberAddress; for (uint i = 0; i < _committee.length; i++) { memberAddress = _committee[i].addr; (memberWeight,) = getWeightCertification(_committee[i]); if (memberWeight < minMemberWeight || memberWeight == minMemberWeight && memberAddress < minMemberAddress) { minMemberPos = i; minMemberWeight = memberWeight; minMemberAddress = memberAddress; } } } function qualifiesToEnterCommittee(address addr, uint256 weight, uint8 _maxCommitteeSize) private view returns (bool qualified, uint entryPos) { uint committeeLength = committee.length; if (committeeLength < _maxCommitteeSize) { return (true, committeeLength); } (address minMemberAddress, uint256 minMemberWeight, uint minMemberPos) = _getMinCommitteeMember(); if (weight > minMemberWeight || weight == minMemberWeight && addr > minMemberAddress) { return (true, minMemberPos); } return (false, 0); } function removeMemberAtPos(uint pos, bool clearFromList, CommitteeStats memory _committeeStats) private returns (CommitteeStats memory newCommitteeStats){ CommitteeMember memory member = committee[pos]; (uint weight, bool certification) = getWeightCertification(member); stakingRewardsContract.committeeMembershipWillChange(member.addr, weight, _committeeStats.totalWeight, true, false); feesAndBootstrapRewardsContract.committeeMembershipWillChange(member.addr, true, certification, certification, _committeeStats.generalCommitteeSize, _committeeStats.certifiedCommitteeSize); delete membersStatus[member.addr]; _committeeStats.generalCommitteeSize--; if (certification) _committeeStats.certifiedCommitteeSize--; _committeeStats.totalWeight = uint96(_committeeStats.totalWeight.sub(weight)); emit CommitteeChange(member.addr, weight, certification, false); if (clearFromList) { uint committeeLength = committee.length; if (pos < committeeLength - 1) { CommitteeMember memory last = committee[committeeLength - 1]; committee[pos] = last; membersStatus[last.addr].pos = uint32(pos); } committee.pop(); } return _committeeStats; } /* * Contracts topology / registry interface */ address electionsContract; IStakingRewards stakingRewardsContract; IFeesAndBootstrapRewards feesAndBootstrapRewardsContract; function refreshContracts() external override { electionsContract = getElectionsContract(); stakingRewardsContract = IStakingRewards(getStakingRewardsContract()); feesAndBootstrapRewardsContract = IFeesAndBootstrapRewards(getFeesAndBootstrapRewardsContract()); } }

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{"success": true, "error": null, "results": {"detectors": [{"check": "reentrancy-no-eth", "impact": "Medium", "confidence": "Medium"}]}}

0x74e4861b3433d19CD85C59bE6eb5f2DDd3E40818

pragma solidity 0.6.6; pragma experimental ABIEncoderV2; contract DSAuthEvents { event LogSetAuthority(address indexed authority); event LogSetOwner(address indexed owner); } contract DSAuth is DSAuthEvents { DSAuthority public authority; address public owner; constructor() public { owner = msg.sender; emit LogSetOwner(msg.sender); } function setOwner(address owner_) public auth { owner = owner_; emit LogSetOwner(owner); } function setAuthority(DSAuthority authority_) public auth { authority = authority_; emit LogSetAuthority(address(authority)); } modifier auth { require(isAuthorized(msg.sender, msg.sig)); _; } function isAuthorized(address src, bytes4 sig) internal view returns (bool) { if (src == address(this)) { return true; } else if (src == owner) { return true; } else if (authority == DSAuthority(0)) { return false; } else { return authority.canCall(src, address(this), sig); } } } abstract contract DSAuthority { function canCall(address src, address dst, bytes4 sig) public virtual view returns (bool); } abstract contract DSGuard { function canCall(address src_, address dst_, bytes4 sig) public view virtual returns (bool); function permit(bytes32 src, bytes32 dst, bytes32 sig) public virtual; function forbid(bytes32 src, bytes32 dst, bytes32 sig) public virtual; function permit(address src, address dst, bytes32 sig) public virtual; function forbid(address src, address dst, bytes32 sig) public virtual; } abstract contract DSGuardFactory { function newGuard() public virtual returns (DSGuard guard); } contract DSMath { function add(uint256 x, uint256 y) internal pure returns (uint256 z) { require((z = x + y) >= x); } function sub(uint256 x, uint256 y) internal pure returns (uint256 z) { require((z = x - y) <= x); } function mul(uint256 x, uint256 y) internal pure returns (uint256 z) { require(y == 0 || (z = x * y) / y == x); } function div(uint256 x, uint256 y) internal pure returns (uint256 z) { return x / y; } function min(uint256 x, uint256 y) internal pure returns (uint256 z) { return x <= y ? x : y; } function max(uint256 x, uint256 y) internal pure returns (uint256 z) { return x >= y ? x : y; } function imin(int256 x, int256 y) internal pure returns (int256 z) { return x <= y ? x : y; } function imax(int256 x, int256 y) internal pure returns (int256 z) { return x >= y ? x : y; } uint256 constant WAD = 10**18; uint256 constant RAY = 10**27; function wmul(uint256 x, uint256 y) internal pure returns (uint256 z) { z = add(mul(x, y), WAD / 2) / WAD; } function rmul(uint256 x, uint256 y) internal pure returns (uint256 z) { z = add(mul(x, y), RAY / 2) / RAY; } function wdiv(uint256 x, uint256 y) internal pure returns (uint256 z) { z = add(mul(x, WAD), y / 2) / y; } function rdiv(uint256 x, uint256 y) internal pure returns (uint256 z) { z = add(mul(x, RAY), y / 2) / y; } // This famous algorithm is called "exponentiation by squaring" // and calculates x^n with x as fixed-point and n as regular unsigned. // // It's O(log n), instead of O(n) for naive repeated multiplication. // // These facts are why it works: // // If n is even, then x^n = (x^2)^(n/2). // If n is odd, then x^n = x * x^(n-1), // and applying the equation for even x gives // x^n = x * (x^2)^((n-1) / 2). // // Also, EVM division is flooring and // floor[(n-1) / 2] = floor[n / 2]. // function rpow(uint256 x, uint256 n) internal pure returns (uint256 z) { z = n % 2 != 0 ? x : RAY; for (n /= 2; n != 0; n /= 2) { x = rmul(x, x); if (n % 2 != 0) { z = rmul(z, x); } } } } contract DSNote { event LogNote( bytes4 indexed sig, address indexed guy, bytes32 indexed foo, bytes32 indexed bar, uint256 wad, bytes fax ) anonymous; modifier note { bytes32 foo; bytes32 bar; assembly { foo := calldataload(4) bar := calldataload(36) } emit LogNote(msg.sig, msg.sender, foo, bar, msg.value, msg.data); _; } } abstract contract DSProxy is DSAuth, DSNote { DSProxyCache public cache; // global cache for contracts constructor(address _cacheAddr) public { require(setCache(_cacheAddr)); } // solhint-disable-next-line no-empty-blocks receive() external payable {} // use the proxy to execute calldata _data on contract _code // function execute(bytes memory _code, bytes memory _data) // public // payable // virtual // returns (address target, bytes32 response); function execute(address _target, bytes memory _data) public payable virtual returns (bytes32 response); //set new cache function setCache(address _cacheAddr) public virtual payable returns (bool); } contract DSProxyCache { mapping(bytes32 => address) cache; function read(bytes memory _code) public view returns (address) { bytes32 hash = keccak256(_code); return cache[hash]; } function write(bytes memory _code) public returns (address target) { assembly { target := create(0, add(_code, 0x20), mload(_code)) switch iszero(extcodesize(target)) case 1 { // throw if contract failed to deploy revert(0, 0) } } bytes32 hash = keccak256(_code); cache[hash] = target; } } abstract contract DSProxyFactoryInterface { function build(address owner) public virtual returns (DSProxy proxy); } contract Migrations { address public owner; uint public last_completed_migration; modifier restricted() { if (msg.sender == owner) _; } constructor() public { owner = msg.sender; } function setCompleted(uint completed) public restricted { last_completed_migration = completed; } function upgrade(address new_address) public restricted { Migrations upgraded = Migrations(new_address); upgraded.setCompleted(last_completed_migration); } } contract AaveHelper is DSMath { using SafeERC20 for ERC20; address payable public constant WALLET_ADDR = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; address public constant DISCOUNT_ADDR = 0x1b14E8D511c9A4395425314f849bD737BAF8208F; uint public constant MANUAL_SERVICE_FEE = 400; // 0.25% Fee uint public constant AUTOMATIC_SERVICE_FEE = 333; // 0.3% Fee address public constant BOT_REGISTRY_ADDRESS = 0x637726f8b08a7ABE3aE3aCaB01A80E2d8ddeF77B; address public constant ETH_ADDR = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant AAVE_LENDING_POOL_ADDRESSES = 0x24a42fD28C976A61Df5D00D0599C34c4f90748c8; uint public constant NINETY_NINE_PERCENT_WEI = 999900000000000000; uint16 public constant AAVE_REFERRAL_CODE = 64; /// @param _collateralAddress underlying token address /// @param _user users address function getMaxCollateral(address _collateralAddress, address _user) public view returns (uint256) { address lendingPoolAddressDataProvider = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolDataProvider(); address lendingPoolCoreAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); uint256 pow10 = 10 ** (18 - _getDecimals(_collateralAddress)); // fetch all needed data (,uint256 totalCollateralETH, uint256 totalBorrowsETH,,uint256 currentLTV,,,) = ILendingPool(lendingPoolAddressDataProvider).calculateUserGlobalData(_user); (,uint256 tokenLTV,,) = ILendingPool(lendingPoolCoreAddress).getReserveConfiguration(_collateralAddress); uint256 collateralPrice = IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_collateralAddress); uint256 userTokenBalance = ILendingPool(lendingPoolCoreAddress).getUserUnderlyingAssetBalance(_collateralAddress, _user); uint256 userTokenBalanceEth = wmul(userTokenBalance * pow10, collateralPrice); // if borrow is 0, return whole user balance if (totalBorrowsETH == 0) { return userTokenBalance; } uint256 maxCollateralEth = div(sub(mul(currentLTV, totalCollateralETH), mul(totalBorrowsETH, 100)), currentLTV); /// @dev final amount can't be higher than users token balance maxCollateralEth = maxCollateralEth > userTokenBalanceEth ? userTokenBalanceEth : maxCollateralEth; // might happen due to wmul precision if (maxCollateralEth >= totalCollateralETH) { return wdiv(totalCollateralETH, collateralPrice) / pow10; } // get sum of all other reserves multiplied with their liquidation thresholds by reversing formula uint256 a = sub(wmul(currentLTV, totalCollateralETH), wmul(tokenLTV, userTokenBalanceEth)); // add new collateral amount multiplied by its threshold, and then divide with new total collateral uint256 newLiquidationThreshold = wdiv(add(a, wmul(sub(userTokenBalanceEth, maxCollateralEth), tokenLTV)), sub(totalCollateralETH, maxCollateralEth)); // if new threshold is lower than first one, calculate new max collateral with newLiquidationThreshold if (newLiquidationThreshold < currentLTV) { maxCollateralEth = div(sub(mul(newLiquidationThreshold, totalCollateralETH), mul(totalBorrowsETH, 100)), newLiquidationThreshold); maxCollateralEth = maxCollateralEth > userTokenBalanceEth ? userTokenBalanceEth : maxCollateralEth; } return wmul(wdiv(maxCollateralEth, collateralPrice) / pow10, NINETY_NINE_PERCENT_WEI); } /// @param _borrowAddress underlying token address /// @param _user users address function getMaxBorrow(address _borrowAddress, address _user) public view returns (uint256) { address lendingPoolAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); (,,,,uint256 availableBorrowsETH,,,) = ILendingPool(lendingPoolAddress).getUserAccountData(_user); uint256 borrowPrice = IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_borrowAddress); return wmul(wdiv(availableBorrowsETH, borrowPrice) / (10 ** (18 - _getDecimals(_borrowAddress))), NINETY_NINE_PERCENT_WEI); } /// @notice Calculates the fee amount /// @param _amount Amount that is converted /// @param _user Actuall user addr not DSProxy /// @param _gasCost Ether amount of gas we are spending for tx /// @param _tokenAddr token addr. of token we are getting for the fee /// @return feeAmount The amount we took for the fee function getFee(uint _amount, address _user, uint _gasCost, address _tokenAddr) internal returns (uint feeAmount) { address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); uint fee = MANUAL_SERVICE_FEE; if (BotRegistry(BOT_REGISTRY_ADDRESS).botList(tx.origin)) { fee = AUTOMATIC_SERVICE_FEE; } if (Discount(DISCOUNT_ADDR).isCustomFeeSet(_user)) { fee = Discount(DISCOUNT_ADDR).getCustomServiceFee(_user); } feeAmount = (fee == 0) ? 0 : (_amount / fee); if (_gasCost != 0) { uint256 price = IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_tokenAddr); _gasCost = wmul(_gasCost, price) / (10 ** (18 - _getDecimals(_tokenAddr))); feeAmount = add(feeAmount, _gasCost); } // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } if (_tokenAddr == ETH_ADDR) { WALLET_ADDR.transfer(feeAmount); } else { ERC20(_tokenAddr).safeTransfer(WALLET_ADDR, feeAmount); } } /// @notice Calculates the gas cost for transaction /// @param _amount Amount that is converted /// @param _user Actuall user addr not DSProxy /// @param _gasCost Ether amount of gas we are spending for tx /// @param _tokenAddr token addr. of token we are getting for the fee /// @return gasCost The amount we took for the gas cost function getGasCost(uint _amount, address _user, uint _gasCost, address _tokenAddr) internal returns (uint gasCost) { address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); if (_gasCost != 0) { uint256 price = IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_tokenAddr); _gasCost = wmul(_gasCost, price); gasCost = _gasCost; } // fee can't go over 20% of the whole amount if (gasCost > (_amount / 5)) { gasCost = _amount / 5; } if (_tokenAddr == ETH_ADDR) { WALLET_ADDR.transfer(gasCost); } else { ERC20(_tokenAddr).safeTransfer(WALLET_ADDR, gasCost); } } /// @notice Returns the owner of the DSProxy that called the contract function getUserAddress() internal view returns (address) { DSProxy proxy = DSProxy(payable(address(this))); return proxy.owner(); } /// @notice Approves token contract to pull underlying tokens from the DSProxy /// @param _tokenAddr Token we are trying to approve /// @param _caller Address which will gain the approval function approveToken(address _tokenAddr, address _caller) internal { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeApprove(_caller, 0); ERC20(_tokenAddr).safeApprove(_caller, uint256(-1)); } } /// @notice Send specific amount from contract to specific user /// @param _token Token we are trying to send /// @param _user User that should receive funds /// @param _amount Amount that should be sent function sendContractBalance(address _token, address _user, uint _amount) public { if (_amount == 0) return; if (_token == ETH_ADDR) { payable(_user).transfer(_amount); } else { ERC20(_token).safeTransfer(_user, _amount); } } function sendFullContractBalance(address _token, address _user) public { if (_token == ETH_ADDR) { sendContractBalance(_token, _user, address(this).balance); } else { sendContractBalance(_token, _user, ERC20(_token).balanceOf(address(this))); } } function _getDecimals(address _token) internal view returns (uint256) { if (_token == ETH_ADDR) return 18; return ERC20(_token).decimals(); } } contract AaveSafetyRatio is AaveHelper { function getSafetyRatio(address _user) public view returns(uint256) { address lendingPoolAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); (,,uint256 totalBorrowsETH,,uint256 availableBorrowsETH,,,) = ILendingPool(lendingPoolAddress).getUserAccountData(_user); return wdiv(add(totalBorrowsETH, availableBorrowsETH), totalBorrowsETH); } } contract AdminAuth { using SafeERC20 for ERC20; address public owner; address public admin; modifier onlyOwner() { require(owner == msg.sender); _; } constructor() public { owner = msg.sender; } /// @notice Admin is set by owner first time, after that admin is super role and has permission to change owner /// @param _admin Address of multisig that becomes admin function setAdminByOwner(address _admin) public { require(msg.sender == owner); require(admin == address(0)); admin = _admin; } /// @notice Admin is able to set new admin /// @param _admin Address of multisig that becomes new admin function setAdminByAdmin(address _admin) public { require(msg.sender == admin); admin = _admin; } /// @notice Admin is able to change owner /// @param _owner Address of new owner function setOwnerByAdmin(address _owner) public { require(msg.sender == admin); owner = _owner; } /// @notice Destroy the contract function kill() public onlyOwner { selfdestruct(payable(owner)); } /// @notice withdraw stuck funds function withdrawStuckFunds(address _token, uint _amount) public onlyOwner { if (_token == 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE) { payable(owner).transfer(_amount); } else { ERC20(_token).safeTransfer(owner, _amount); } } } contract Auth is AdminAuth { bool public ALL_AUTHORIZED = false; mapping(address => bool) public authorized; modifier onlyAuthorized() { require(ALL_AUTHORIZED || authorized[msg.sender]); _; } constructor() public { authorized[msg.sender] = true; } function setAuthorized(address _user, bool _approved) public onlyOwner { authorized[_user] = _approved; } function setAllAuthorized(bool _authorized) public onlyOwner { ALL_AUTHORIZED = _authorized; } } contract ProxyPermission { address public constant FACTORY_ADDRESS = 0x5a15566417e6C1c9546523066500bDDBc53F88C7; /// @notice Called in the context of DSProxy to authorize an address /// @param _contractAddr Address which will be authorized function givePermission(address _contractAddr) public { address currAuthority = address(DSAuth(address(this)).authority()); DSGuard guard = DSGuard(currAuthority); if (currAuthority == address(0)) { guard = DSGuardFactory(FACTORY_ADDRESS).newGuard(); DSAuth(address(this)).setAuthority(DSAuthority(address(guard))); } guard.permit(_contractAddr, address(this), bytes4(keccak256("execute(address,bytes)"))); } /// @notice Called in the context of DSProxy to remove authority of an address /// @param _contractAddr Auth address which will be removed from authority list function removePermission(address _contractAddr) public { address currAuthority = address(DSAuth(address(this)).authority()); // if there is no authority, that means that contract doesn't have permission if (currAuthority == address(0)) { return; } DSGuard guard = DSGuard(currAuthority); guard.forbid(_contractAddr, address(this), bytes4(keccak256("execute(address,bytes)"))); } } contract CompoundMonitorProxy is AdminAuth { using SafeERC20 for ERC20; uint public CHANGE_PERIOD; address public monitor; address public newMonitor; address public lastMonitor; uint public changeRequestedTimestamp; mapping(address => bool) public allowed; event MonitorChangeInitiated(address oldMonitor, address newMonitor); event MonitorChangeCanceled(); event MonitorChangeFinished(address monitor); event MonitorChangeReverted(address monitor); // if someone who is allowed become malicious, owner can't be changed modifier onlyAllowed() { require(allowed[msg.sender] || msg.sender == owner); _; } modifier onlyMonitor() { require (msg.sender == monitor); _; } constructor(uint _changePeriod) public { CHANGE_PERIOD = _changePeriod * 1 days; } /// @notice Only monitor contract is able to call execute on users proxy /// @param _owner Address of cdp owner (users DSProxy address) /// @param _compoundSaverProxy Address of CompoundSaverProxy /// @param _data Data to send to CompoundSaverProxy function callExecute(address _owner, address _compoundSaverProxy, bytes memory _data) public payable onlyMonitor { // execute reverts if calling specific method fails DSProxyInterface(_owner).execute{value: msg.value}(_compoundSaverProxy, _data); // return if anything left if (address(this).balance > 0) { msg.sender.transfer(address(this).balance); } } /// @notice Allowed users are able to set Monitor contract without any waiting period first time /// @param _monitor Address of Monitor contract function setMonitor(address _monitor) public onlyAllowed { require(monitor == address(0)); monitor = _monitor; } /// @notice Allowed users are able to start procedure for changing monitor /// @dev after CHANGE_PERIOD needs to call confirmNewMonitor to actually make a change /// @param _newMonitor address of new monitor function changeMonitor(address _newMonitor) public onlyAllowed { require(changeRequestedTimestamp == 0); changeRequestedTimestamp = now; lastMonitor = monitor; newMonitor = _newMonitor; emit MonitorChangeInitiated(lastMonitor, newMonitor); } /// @notice At any point allowed users are able to cancel monitor change function cancelMonitorChange() public onlyAllowed { require(changeRequestedTimestamp > 0); changeRequestedTimestamp = 0; newMonitor = address(0); emit MonitorChangeCanceled(); } /// @notice Anyone is able to confirm new monitor after CHANGE_PERIOD if process is started function confirmNewMonitor() public onlyAllowed { require((changeRequestedTimestamp + CHANGE_PERIOD) < now); require(changeRequestedTimestamp != 0); require(newMonitor != address(0)); monitor = newMonitor; newMonitor = address(0); changeRequestedTimestamp = 0; emit MonitorChangeFinished(monitor); } /// @notice Its possible to revert monitor to last used monitor function revertMonitor() public onlyAllowed { require(lastMonitor != address(0)); monitor = lastMonitor; emit MonitorChangeReverted(monitor); } /// @notice Allowed users are able to add new allowed user /// @param _user Address of user that will be allowed function addAllowed(address _user) public onlyAllowed { allowed[_user] = true; } /// @notice Allowed users are able to remove allowed user /// @dev owner is always allowed even if someone tries to remove it from allowed mapping /// @param _user Address of allowed user function removeAllowed(address _user) public onlyAllowed { allowed[_user] = false; } function setChangePeriod(uint _periodInDays) public onlyAllowed { require(_periodInDays * 1 days > CHANGE_PERIOD); CHANGE_PERIOD = _periodInDays * 1 days; } /// @notice In case something is left in contract, owner is able to withdraw it /// @param _token address of token to withdraw balance function withdrawToken(address _token) public onlyOwner { uint balance = ERC20(_token).balanceOf(address(this)); ERC20(_token).safeTransfer(msg.sender, balance); } /// @notice In case something is left in contract, owner is able to withdraw it function withdrawEth() public onlyOwner { uint balance = address(this).balance; msg.sender.transfer(balance); } } contract CompoundSubscriptions is AdminAuth { struct CompoundHolder { address user; uint128 minRatio; uint128 maxRatio; uint128 optimalRatioBoost; uint128 optimalRatioRepay; bool boostEnabled; } struct SubPosition { uint arrPos; bool subscribed; } CompoundHolder[] public subscribers; mapping (address => SubPosition) public subscribersPos; uint public changeIndex; event Subscribed(address indexed user); event Unsubscribed(address indexed user); event Updated(address indexed user); event ParamUpdates(address indexed user, uint128, uint128, uint128, uint128, bool); /// @dev Called by the DSProxy contract which owns the Compound position /// @notice Adds the users Compound poistion in the list of subscriptions so it can be monitored /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalBoost Ratio amount which boost should target /// @param _optimalRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled function subscribe(uint128 _minRatio, uint128 _maxRatio, uint128 _optimalBoost, uint128 _optimalRepay, bool _boostEnabled) external { // if boost is not enabled, set max ratio to max uint uint128 localMaxRatio = _boostEnabled ? _maxRatio : uint128(-1); require(checkParams(_minRatio, localMaxRatio), "Must be correct params"); SubPosition storage subInfo = subscribersPos[msg.sender]; CompoundHolder memory subscription = CompoundHolder({ minRatio: _minRatio, maxRatio: localMaxRatio, optimalRatioBoost: _optimalBoost, optimalRatioRepay: _optimalRepay, user: msg.sender, boostEnabled: _boostEnabled }); changeIndex++; if (subInfo.subscribed) { subscribers[subInfo.arrPos] = subscription; emit Updated(msg.sender); emit ParamUpdates(msg.sender, _minRatio, localMaxRatio, _optimalBoost, _optimalRepay, _boostEnabled); } else { subscribers.push(subscription); subInfo.arrPos = subscribers.length - 1; subInfo.subscribed = true; emit Subscribed(msg.sender); } } /// @notice Called by the users DSProxy /// @dev Owner who subscribed cancels his subscription function unsubscribe() external { _unsubscribe(msg.sender); } /// @dev Checks limit if minRatio is bigger than max /// @param _minRatio Minimum ratio, bellow which repay can be triggered /// @param _maxRatio Maximum ratio, over which boost can be triggered /// @return Returns bool if the params are correct function checkParams(uint128 _minRatio, uint128 _maxRatio) internal pure returns (bool) { if (_minRatio > _maxRatio) { return false; } return true; } /// @dev Internal method to remove a subscriber from the list /// @param _user The actual address that owns the Compound position function _unsubscribe(address _user) internal { require(subscribers.length > 0, "Must have subscribers in the list"); SubPosition storage subInfo = subscribersPos[_user]; require(subInfo.subscribed, "Must first be subscribed"); address lastOwner = subscribers[subscribers.length - 1].user; SubPosition storage subInfo2 = subscribersPos[lastOwner]; subInfo2.arrPos = subInfo.arrPos; subscribers[subInfo.arrPos] = subscribers[subscribers.length - 1]; subscribers.pop(); // remove last element and reduce arr length changeIndex++; subInfo.subscribed = false; subInfo.arrPos = 0; emit Unsubscribed(msg.sender); } /// @dev Checks if the user is subscribed /// @param _user The actual address that owns the Compound position /// @return If the user is subscribed function isSubscribed(address _user) public view returns (bool) { SubPosition storage subInfo = subscribersPos[_user]; return subInfo.subscribed; } /// @dev Returns subscribtion information about a user /// @param _user The actual address that owns the Compound position /// @return Subscription information about the user if exists function getHolder(address _user) public view returns (CompoundHolder memory) { SubPosition storage subInfo = subscribersPos[_user]; return subscribers[subInfo.arrPos]; } /// @notice Helper method to return all the subscribed CDPs /// @return List of all subscribers function getSubscribers() public view returns (CompoundHolder[] memory) { return subscribers; } /// @notice Helper method for the frontend, returns all the subscribed CDPs paginated /// @param _page What page of subscribers you want /// @param _perPage Number of entries per page /// @return List of all subscribers for that page function getSubscribersByPage(uint _page, uint _perPage) public view returns (CompoundHolder[] memory) { CompoundHolder[] memory holders = new CompoundHolder[](_perPage); uint start = _page * _perPage; uint end = start + _perPage; end = (end > holders.length) ? holders.length : end; uint count = 0; for (uint i = start; i < end; i++) { holders[count] = subscribers[i]; count++; } return holders; } ////////////// ADMIN METHODS /////////////////// /// @notice Admin function to unsubscribe a CDP /// @param _user The actual address that owns the Compound position function unsubscribeByAdmin(address _user) public onlyOwner { SubPosition storage subInfo = subscribersPos[_user]; if (subInfo.subscribed) { _unsubscribe(_user); } } } contract CompoundSubscriptionsProxy is ProxyPermission { address public constant COMPOUND_SUBSCRIPTION_ADDRESS = 0x52015EFFD577E08f498a0CCc11905925D58D6207; address public constant COMPOUND_MONITOR_PROXY = 0xB1cF8DE8e791E4Ed1Bd86c03E2fc1f14389Cb10a; /// @notice Calls subscription contract and creates a DSGuard if non existent /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalRatioBoost Ratio amount which boost should target /// @param _optimalRatioRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled function subscribe( uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled ) public { givePermission(COMPOUND_MONITOR_PROXY); ICompoundSubscription(COMPOUND_SUBSCRIPTION_ADDRESS).subscribe( _minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled); } /// @notice Calls subscription contract and updated existing parameters /// @dev If subscription is non existent this will create one /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalRatioBoost Ratio amount which boost should target /// @param _optimalRatioRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled function update( uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled ) public { ICompoundSubscription(COMPOUND_SUBSCRIPTION_ADDRESS).subscribe(_minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled); } /// @notice Calls the subscription contract to unsubscribe the caller function unsubscribe() public { removePermission(COMPOUND_MONITOR_PROXY); ICompoundSubscription(COMPOUND_SUBSCRIPTION_ADDRESS).unsubscribe(); } } contract CompoundCreateTaker is ProxyPermission { using SafeERC20 for ERC20; address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); // solhint-disable-next-line const-name-snakecase DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); struct CreateInfo { address cCollAddress; address cBorrowAddress; uint depositAmount; } /// @notice Main function which will take a FL and open a leverage position /// @dev Call through DSProxy, if _exchangeData.destAddr is a token approve DSProxy /// @param _createInfo [cCollAddress, cBorrowAddress, depositAmount] /// @param _exchangeData Exchange data struct function openLeveragedLoan( CreateInfo memory _createInfo, SaverExchangeCore.ExchangeData memory _exchangeData, address payable _compReceiver ) public payable { uint loanAmount = _exchangeData.srcAmount; // Pull tokens from user if (_exchangeData.destAddr != ETH_ADDRESS) { ERC20(_exchangeData.destAddr).safeTransferFrom(msg.sender, address(this), _createInfo.depositAmount); } else { require(msg.value >= _createInfo.depositAmount, "Must send correct amount of eth"); } // Send tokens to FL receiver sendDeposit(_compReceiver, _exchangeData.destAddr); // Pack the struct data (uint[4] memory numData, address[6] memory cAddresses, bytes memory callData) = _packData(_createInfo, _exchangeData); bytes memory paramsData = abi.encode(numData, cAddresses, callData, address(this)); givePermission(_compReceiver); lendingPool.flashLoan(_compReceiver, _exchangeData.srcAddr, loanAmount, paramsData); removePermission(_compReceiver); logger.Log(address(this), msg.sender, "CompoundLeveragedLoan", abi.encode(_exchangeData.srcAddr, _exchangeData.destAddr, _exchangeData.srcAmount, _exchangeData.destAmount)); } function sendDeposit(address payable _compoundReceiver, address _token) internal { if (_token != ETH_ADDRESS) { ERC20(_token).safeTransfer(_compoundReceiver, ERC20(_token).balanceOf(address(this))); } _compoundReceiver.transfer(address(this).balance); } function _packData( CreateInfo memory _createInfo, SaverExchangeCore.ExchangeData memory exchangeData ) internal pure returns (uint[4] memory numData, address[6] memory cAddresses, bytes memory callData) { numData = [ exchangeData.srcAmount, exchangeData.destAmount, exchangeData.minPrice, exchangeData.price0x ]; cAddresses = [ _createInfo.cCollAddress, _createInfo.cBorrowAddress, exchangeData.srcAddr, exchangeData.destAddr, exchangeData.exchangeAddr, exchangeData.wrapper ]; callData = exchangeData.callData; } } contract CarefulMath { /** * @dev Possible error codes that we can return */ enum MathError { NO_ERROR, DIVISION_BY_ZERO, INTEGER_OVERFLOW, INTEGER_UNDERFLOW } /** * @dev Multiplies two numbers, returns an error on overflow. */ function mulUInt(uint a, uint b) internal pure returns (MathError, uint) { if (a == 0) { return (MathError.NO_ERROR, 0); } uint c = a * b; if (c / a != b) { return (MathError.INTEGER_OVERFLOW, 0); } else { return (MathError.NO_ERROR, c); } } /** * @dev Integer division of two numbers, truncating the quotient. */ function divUInt(uint a, uint b) internal pure returns (MathError, uint) { if (b == 0) { return (MathError.DIVISION_BY_ZERO, 0); } return (MathError.NO_ERROR, a / b); } /** * @dev Subtracts two numbers, returns an error on overflow (i.e. if subtrahend is greater than minuend). */ function subUInt(uint a, uint b) internal pure returns (MathError, uint) { if (b <= a) { return (MathError.NO_ERROR, a - b); } else { return (MathError.INTEGER_UNDERFLOW, 0); } } /** * @dev Adds two numbers, returns an error on overflow. */ function addUInt(uint a, uint b) internal pure returns (MathError, uint) { uint c = a + b; if (c >= a) { return (MathError.NO_ERROR, c); } else { return (MathError.INTEGER_OVERFLOW, 0); } } /** * @dev add a and b and then subtract c */ function addThenSubUInt(uint a, uint b, uint c) internal pure returns (MathError, uint) { (MathError err0, uint sum) = addUInt(a, b); if (err0 != MathError.NO_ERROR) { return (err0, 0); } return subUInt(sum, c); } } contract Exponential is CarefulMath { uint constant expScale = 1e18; uint constant halfExpScale = expScale/2; uint constant mantissaOne = expScale; struct Exp { uint mantissa; } /** * @dev Creates an exponential from numerator and denominator values. * Note: Returns an error if (`num` * 10e18) > MAX_INT, * or if `denom` is zero. */ function getExp(uint num, uint denom) pure internal returns (MathError, Exp memory) { (MathError err0, uint scaledNumerator) = mulUInt(num, expScale); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } (MathError err1, uint rational) = divUInt(scaledNumerator, denom); if (err1 != MathError.NO_ERROR) { return (err1, Exp({mantissa: 0})); } return (MathError.NO_ERROR, Exp({mantissa: rational})); } /** * @dev Adds two exponentials, returning a new exponential. */ function addExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) { (MathError error, uint result) = addUInt(a.mantissa, b.mantissa); return (error, Exp({mantissa: result})); } /** * @dev Subtracts two exponentials, returning a new exponential. */ function subExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) { (MathError error, uint result) = subUInt(a.mantissa, b.mantissa); return (error, Exp({mantissa: result})); } /** * @dev Multiply an Exp by a scalar, returning a new Exp. */ function mulScalar(Exp memory a, uint scalar) pure internal returns (MathError, Exp memory) { (MathError err0, uint scaledMantissa) = mulUInt(a.mantissa, scalar); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } return (MathError.NO_ERROR, Exp({mantissa: scaledMantissa})); } /** * @dev Multiply an Exp by a scalar, then truncate to return an unsigned integer. */ function mulScalarTruncate(Exp memory a, uint scalar) pure internal returns (MathError, uint) { (MathError err, Exp memory product) = mulScalar(a, scalar); if (err != MathError.NO_ERROR) { return (err, 0); } return (MathError.NO_ERROR, truncate(product)); } /** * @dev Multiply an Exp by a scalar, truncate, then add an to an unsigned integer, returning an unsigned integer. */ function mulScalarTruncateAddUInt(Exp memory a, uint scalar, uint addend) pure internal returns (MathError, uint) { (MathError err, Exp memory product) = mulScalar(a, scalar); if (err != MathError.NO_ERROR) { return (err, 0); } return addUInt(truncate(product), addend); } /** * @dev Divide an Exp by a scalar, returning a new Exp. */ function divScalar(Exp memory a, uint scalar) pure internal returns (MathError, Exp memory) { (MathError err0, uint descaledMantissa) = divUInt(a.mantissa, scalar); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } return (MathError.NO_ERROR, Exp({mantissa: descaledMantissa})); } /** * @dev Divide a scalar by an Exp, returning a new Exp. */ function divScalarByExp(uint scalar, Exp memory divisor) pure internal returns (MathError, Exp memory) { /* We are doing this as: getExp(mulUInt(expScale, scalar), divisor.mantissa) How it works: Exp = a / b; Scalar = s; `s / (a / b)` = `b * s / a` and since for an Exp `a = mantissa, b = expScale` */ (MathError err0, uint numerator) = mulUInt(expScale, scalar); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } return getExp(numerator, divisor.mantissa); } /** * @dev Divide a scalar by an Exp, then truncate to return an unsigned integer. */ function divScalarByExpTruncate(uint scalar, Exp memory divisor) pure internal returns (MathError, uint) { (MathError err, Exp memory fraction) = divScalarByExp(scalar, divisor); if (err != MathError.NO_ERROR) { return (err, 0); } return (MathError.NO_ERROR, truncate(fraction)); } /** * @dev Multiplies two exponentials, returning a new exponential. */ function mulExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) { (MathError err0, uint doubleScaledProduct) = mulUInt(a.mantissa, b.mantissa); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } // We add half the scale before dividing so that we get rounding instead of truncation. // See "Listing 6" and text above it at https://accu.org/index.php/journals/1717 // Without this change, a result like 6.6...e-19 will be truncated to 0 instead of being rounded to 1e-18. (MathError err1, uint doubleScaledProductWithHalfScale) = addUInt(halfExpScale, doubleScaledProduct); if (err1 != MathError.NO_ERROR) { return (err1, Exp({mantissa: 0})); } (MathError err2, uint product) = divUInt(doubleScaledProductWithHalfScale, expScale); // The only error `div` can return is MathError.DIVISION_BY_ZERO but we control `expScale` and it is not zero. assert(err2 == MathError.NO_ERROR); return (MathError.NO_ERROR, Exp({mantissa: product})); } /** * @dev Multiplies two exponentials given their mantissas, returning a new exponential. */ function mulExp(uint a, uint b) pure internal returns (MathError, Exp memory) { return mulExp(Exp({mantissa: a}), Exp({mantissa: b})); } /** * @dev Multiplies three exponentials, returning a new exponential. */ function mulExp3(Exp memory a, Exp memory b, Exp memory c) pure internal returns (MathError, Exp memory) { (MathError err, Exp memory ab) = mulExp(a, b); if (err != MathError.NO_ERROR) { return (err, ab); } return mulExp(ab, c); } /** * @dev Divides two exponentials, returning a new exponential. * (a/scale) / (b/scale) = (a/scale) * (scale/b) = a/b, * which we can scale as an Exp by calling getExp(a.mantissa, b.mantissa) */ function divExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) { return getExp(a.mantissa, b.mantissa); } /** * @dev Truncates the given exp to a whole number value. * For example, truncate(Exp{mantissa: 15 * expScale}) = 15 */ function truncate(Exp memory exp) pure internal returns (uint) { // Note: We are not using careful math here as we're performing a division that cannot fail return exp.mantissa / expScale; } /** * @dev Checks if first Exp is less than second Exp. */ function lessThanExp(Exp memory left, Exp memory right) pure internal returns (bool) { return left.mantissa < right.mantissa; } /** * @dev Checks if left Exp <= right Exp. */ function lessThanOrEqualExp(Exp memory left, Exp memory right) pure internal returns (bool) { return left.mantissa <= right.mantissa; } /** * @dev Checks if left Exp > right Exp. */ function greaterThanExp(Exp memory left, Exp memory right) pure internal returns (bool) { return left.mantissa > right.mantissa; } /** * @dev returns true if Exp is exactly zero */ function isZeroExp(Exp memory value) pure internal returns (bool) { return value.mantissa == 0; } } contract CompoundBorrowProxy { using SafeERC20 for ERC20; address public constant ETH_ADDR = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant COMPTROLLER_ADDR = 0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B; function borrow(address _cCollToken, address _cBorrowToken, address _borrowToken, uint _amount) public { address[] memory markets = new address[](2); markets[0] = _cCollToken; markets[1] = _cBorrowToken; ComptrollerInterface(COMPTROLLER_ADDR).enterMarkets(markets); require(CTokenInterface(_cBorrowToken).borrow(_amount) == 0); // withdraw funds to msg.sender if (_borrowToken != ETH_ADDR) { ERC20(_borrowToken).safeTransfer(msg.sender, ERC20(_borrowToken).balanceOf(address(this))); } else { msg.sender.transfer(address(this).balance); } } } contract CreamSafetyRatio is Exponential, DSMath { // solhint-disable-next-line const-name-snakecase ComptrollerInterface public constant comp = ComptrollerInterface(0x3d5BC3c8d13dcB8bF317092d84783c2697AE9258); /// @notice Calcualted the ratio of debt / adjusted collateral /// @param _user Address of the user function getSafetyRatio(address _user) public view returns (uint) { // For each asset the account is in address[] memory assets = comp.getAssetsIn(_user); address oracleAddr = comp.oracle(); uint sumCollateral = 0; uint sumBorrow = 0; for (uint i = 0; i < assets.length; i++) { address asset = assets[i]; (, uint cTokenBalance, uint borrowBalance, uint exchangeRateMantissa) = CTokenInterface(asset).getAccountSnapshot(_user); Exp memory oraclePrice; if (cTokenBalance != 0 || borrowBalance != 0) { oraclePrice = Exp({mantissa: CompoundOracleInterface(oracleAddr).getUnderlyingPrice(asset)}); } // Sum up collateral in Eth if (cTokenBalance != 0) { (, uint collFactorMantissa) = comp.markets(address(asset)); Exp memory collateralFactor = Exp({mantissa: collFactorMantissa}); Exp memory exchangeRate = Exp({mantissa: exchangeRateMantissa}); (, Exp memory tokensToEther) = mulExp3(collateralFactor, exchangeRate, oraclePrice); (, sumCollateral) = mulScalarTruncateAddUInt(tokensToEther, cTokenBalance, sumCollateral); } // Sum up debt in Eth if (borrowBalance != 0) { (, sumBorrow) = mulScalarTruncateAddUInt(oraclePrice, borrowBalance, sumBorrow); } } if (sumBorrow == 0) return uint(-1); uint borrowPowerUsed = (sumBorrow * 10**18) / sumCollateral; return wdiv(1e18, borrowPowerUsed); } } contract CreamSaverHelper is DSMath, Exponential { using SafeERC20 for ERC20; address payable public constant WALLET_ADDR = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; address public constant DISCOUNT_ADDR = 0x1b14E8D511c9A4395425314f849bD737BAF8208F; uint public constant MANUAL_SERVICE_FEE = 400; // 0.25% Fee uint public constant AUTOMATIC_SERVICE_FEE = 333; // 0.3% Fee address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant CETH_ADDRESS = 0xD06527D5e56A3495252A528C4987003b712860eE; address public constant COMPTROLLER = 0x3d5BC3c8d13dcB8bF317092d84783c2697AE9258; address public constant BOT_REGISTRY_ADDRESS = 0x637726f8b08a7ABE3aE3aCaB01A80E2d8ddeF77B; /// @notice Helper method to payback the cream debt /// @dev If amount is bigger it will repay the whole debt and send the extra to the _user /// @param _amount Amount of tokens we want to repay /// @param _cBorrowToken Ctoken address we are repaying /// @param _borrowToken Token address we are repaying /// @param _user Owner of the cream position we are paying back function paybackDebt(uint _amount, address _cBorrowToken, address _borrowToken, address payable _user) internal { uint wholeDebt = CTokenInterface(_cBorrowToken).borrowBalanceCurrent(address(this)); if (_amount > wholeDebt) { if (_borrowToken == ETH_ADDRESS) { _user.transfer((_amount - wholeDebt)); } else { ERC20(_borrowToken).safeTransfer(_user, (_amount - wholeDebt)); } _amount = wholeDebt; } approveCToken(_borrowToken, _cBorrowToken); if (_borrowToken == ETH_ADDRESS) { CEtherInterface(_cBorrowToken).repayBorrow{value: _amount}(); } else { require(CTokenInterface(_cBorrowToken).repayBorrow(_amount) == 0); } } /// @notice Calculates the fee amount /// @param _amount Amount that is converted /// @param _user Actuall user addr not DSProxy /// @param _gasCost Ether amount of gas we are spending for tx /// @param _cTokenAddr CToken addr. of token we are getting for the fee /// @return feeAmount The amount we took for the fee function getFee(uint _amount, address _user, uint _gasCost, address _cTokenAddr) internal returns (uint feeAmount) { uint fee = MANUAL_SERVICE_FEE; if (BotRegistry(BOT_REGISTRY_ADDRESS).botList(tx.origin)) { fee = AUTOMATIC_SERVICE_FEE; } address tokenAddr = getUnderlyingAddr(_cTokenAddr); if (Discount(DISCOUNT_ADDR).isCustomFeeSet(_user)) { fee = Discount(DISCOUNT_ADDR).getCustomServiceFee(_user); } feeAmount = (fee == 0) ? 0 : (_amount / fee); if (_gasCost != 0) { address oracle = ComptrollerInterface(COMPTROLLER).oracle(); uint ethTokenPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(_cTokenAddr); _gasCost = wdiv(_gasCost, ethTokenPrice); feeAmount = add(feeAmount, _gasCost); } // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } if (tokenAddr == ETH_ADDRESS) { WALLET_ADDR.transfer(feeAmount); } else { ERC20(tokenAddr).safeTransfer(WALLET_ADDR, feeAmount); } } /// @notice Calculates the gas cost of transaction and send it to wallet /// @param _amount Amount that is converted /// @param _gasCost Ether amount of gas we are spending for tx /// @param _cTokenAddr CToken addr. of token we are getting for the fee /// @return feeAmount The amount we took for the fee function getGasCost(uint _amount, uint _gasCost, address _cTokenAddr) internal returns (uint feeAmount) { address tokenAddr = getUnderlyingAddr(_cTokenAddr); if (_gasCost != 0) { address oracle = ComptrollerInterface(COMPTROLLER).oracle(); uint ethTokenPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(_cTokenAddr); feeAmount = wdiv(_gasCost, ethTokenPrice); } // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } if (tokenAddr == ETH_ADDRESS) { WALLET_ADDR.transfer(feeAmount); } else { ERC20(tokenAddr).safeTransfer(WALLET_ADDR, feeAmount); } } /// @notice Enters the market for the collatera and borrow tokens /// @param _cTokenAddrColl Collateral address we are entering the market in /// @param _cTokenAddrBorrow Borrow address we are entering the market in function enterMarket(address _cTokenAddrColl, address _cTokenAddrBorrow) internal { address[] memory markets = new address[](2); markets[0] = _cTokenAddrColl; markets[1] = _cTokenAddrBorrow; ComptrollerInterface(COMPTROLLER).enterMarkets(markets); } /// @notice Approves CToken contract to pull underlying tokens from the DSProxy /// @param _tokenAddr Token we are trying to approve /// @param _cTokenAddr Address which will gain the approval function approveCToken(address _tokenAddr, address _cTokenAddr) internal { if (_tokenAddr != ETH_ADDRESS) { ERC20(_tokenAddr).safeApprove(_cTokenAddr, 0); ERC20(_tokenAddr).safeApprove(_cTokenAddr, uint(-1)); } } /// @notice Returns the underlying address of the cToken asset /// @param _cTokenAddress cToken address /// @return Token address of the cToken specified function getUnderlyingAddr(address _cTokenAddress) internal returns (address) { if (_cTokenAddress == CETH_ADDRESS) { return ETH_ADDRESS; } else { return CTokenInterface(_cTokenAddress).underlying(); } } /// @notice Returns the owner of the DSProxy that called the contract function getUserAddress() internal view returns (address) { DSProxy proxy = DSProxy(uint160(address(this))); return proxy.owner(); } /// @notice Returns the maximum amount of collateral available to withdraw /// @dev Due to rounding errors the result is - 1% wei from the exact amount /// @param _cCollAddress Collateral we are getting the max value of /// @param _account Users account /// @return Returns the max. collateral amount in that token function getMaxCollateral(address _cCollAddress, address _account) public returns (uint) { (, uint liquidityInEth, ) = ComptrollerInterface(COMPTROLLER).getAccountLiquidity(_account); uint usersBalance = CTokenInterface(_cCollAddress).balanceOfUnderlying(_account); address oracle = ComptrollerInterface(COMPTROLLER).oracle(); if (liquidityInEth == 0) return usersBalance; CTokenInterface(_cCollAddress).accrueInterest(); if (_cCollAddress == CETH_ADDRESS) { if (liquidityInEth > usersBalance) return usersBalance; return sub(liquidityInEth, (liquidityInEth / 100)); } uint ethPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(_cCollAddress); uint liquidityInToken = wdiv(liquidityInEth, ethPrice); if (liquidityInToken > usersBalance) return usersBalance; return sub(liquidityInToken, (liquidityInToken / 100)); // cut off 1% due to rounding issues } /// @notice Returns the maximum amount of borrow amount available /// @dev Due to rounding errors the result is - 1% wei from the exact amount /// @param _cBorrowAddress Borrow token we are getting the max value of /// @param _account Users account /// @return Returns the max. borrow amount in that token function getMaxBorrow(address _cBorrowAddress, address _account) public returns (uint) { (, uint liquidityInEth, ) = ComptrollerInterface(COMPTROLLER).getAccountLiquidity(_account); address oracle = ComptrollerInterface(COMPTROLLER).oracle(); CTokenInterface(_cBorrowAddress).accrueInterest(); if (_cBorrowAddress == CETH_ADDRESS) return sub(liquidityInEth, (liquidityInEth / 100)); uint ethPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(_cBorrowAddress); uint liquidityInToken = wdiv(liquidityInEth, ethPrice); return sub(liquidityInToken, (liquidityInToken / 100)); // cut off 1% due to rounding issues } } contract CreamBorrowProxy { using SafeERC20 for ERC20; address public constant ETH_ADDR = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant COMPTROLLER_ADDR = 0x3d5BC3c8d13dcB8bF317092d84783c2697AE9258; function borrow(address _cCollToken, address _cBorrowToken, address _borrowToken, uint _amount) public { address[] memory markets = new address[](2); markets[0] = _cCollToken; markets[1] = _cBorrowToken; ComptrollerInterface(COMPTROLLER_ADDR).enterMarkets(markets); require(CTokenInterface(_cBorrowToken).borrow(_amount) == 0); // withdraw funds to msg.sender if (_borrowToken != ETH_ADDR) { ERC20(_borrowToken).safeTransfer(msg.sender, ERC20(_borrowToken).balanceOf(address(this))); } else { msg.sender.transfer(address(this).balance); } } } contract AllowanceProxy is AdminAuth { using SafeERC20 for ERC20; address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; // TODO: Real saver exchange address SaverExchange saverExchange = SaverExchange(0x235abFAd01eb1BDa28Ef94087FBAA63E18074926); function callSell(SaverExchangeCore.ExchangeData memory exData) public payable { pullAndSendTokens(exData.srcAddr, exData.srcAmount); saverExchange.sell{value: msg.value}(exData, msg.sender); } function callBuy(SaverExchangeCore.ExchangeData memory exData) public payable { pullAndSendTokens(exData.srcAddr, exData.srcAmount); saverExchange.buy{value: msg.value}(exData, msg.sender); } function pullAndSendTokens(address _tokenAddr, uint _amount) internal { if (_tokenAddr == KYBER_ETH_ADDRESS) { require(msg.value >= _amount, "msg.value smaller than amount"); } else { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(saverExchange), _amount); } } function ownerChangeExchange(address payable _newExchange) public onlyOwner { saverExchange = SaverExchange(_newExchange); } } contract Prices is DSMath { address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; enum ActionType { SELL, BUY } /// @notice Returns the best estimated price from 2 exchanges /// @param _amount Amount of source tokens you want to exchange /// @param _srcToken Address of the source token /// @param _destToken Address of the destination token /// @param _type Type of action SELL|BUY /// @param _wrappers Array of wrapper addresses to compare /// @return (address, uint) The address of the best exchange and the exchange price function getBestPrice( uint256 _amount, address _srcToken, address _destToken, ActionType _type, address[] memory _wrappers ) public returns (address, uint256) { uint256[] memory rates = new uint256[](_wrappers.length); for (uint i=0; i<_wrappers.length; i++) { rates[i] = getExpectedRate(_wrappers[i], _srcToken, _destToken, _amount, _type); } if (_type == ActionType.SELL) { return getBiggestRate(_wrappers, rates); } else { return getSmallestRate(_wrappers, rates); } } /// @notice Return the expected rate from the exchange wrapper /// @dev In case of Oasis/Uniswap handles the different precision tokens /// @param _wrapper Address of exchange wrapper /// @param _srcToken From token /// @param _destToken To token /// @param _amount Amount to be exchanged /// @param _type Type of action SELL|BUY function getExpectedRate( address _wrapper, address _srcToken, address _destToken, uint256 _amount, ActionType _type ) public returns (uint256) { bool success; bytes memory result; if (_type == ActionType.SELL) { (success, result) = _wrapper.call(abi.encodeWithSignature( "getSellRate(address,address,uint256)", _srcToken, _destToken, _amount )); } else { (success, result) = _wrapper.call(abi.encodeWithSignature( "getBuyRate(address,address,uint256)", _srcToken, _destToken, _amount )); } if (success) { return sliceUint(result, 0); } return 0; } /// @notice Finds the biggest rate between exchanges, needed for sell rate /// @param _wrappers Array of wrappers to compare /// @param _rates Array of rates to compare function getBiggestRate( address[] memory _wrappers, uint256[] memory _rates ) internal pure returns (address, uint) { uint256 maxIndex = 0; // starting from 0 in case there is only one rate in array for (uint256 i=0; i<_rates.length; i++) { if (_rates[i] > _rates[maxIndex]) { maxIndex = i; } } return (_wrappers[maxIndex], _rates[maxIndex]); } /// @notice Finds the smallest rate between exchanges, needed for buy rate /// @param _wrappers Array of wrappers to compare /// @param _rates Array of rates to compare function getSmallestRate( address[] memory _wrappers, uint256[] memory _rates ) internal pure returns (address, uint) { uint256 minIndex = 0; // starting from 0 in case there is only one rate in array for (uint256 i=0; i<_rates.length; i++) { if ((_rates[i] < _rates[minIndex] && _rates[i] > 0) || _rates[minIndex] == 0) { minIndex = i; } } return (_wrappers[minIndex], _rates[minIndex]); } function getDecimals(address _token) internal view returns (uint256) { if (_token == KYBER_ETH_ADDRESS) return 18; return ERC20(_token).decimals(); } function sliceUint(bytes memory bs, uint256 start) internal pure returns (uint256) { require(bs.length >= start + 32, "slicing out of range"); uint256 x; assembly { x := mload(add(bs, add(0x20, start))) } return x; } } contract SaverExchangeHelper { using SafeERC20 for ERC20; address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant WETH_ADDRESS = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address payable public constant WALLET_ID = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; address public constant DISCOUNT_ADDRESS = 0x1b14E8D511c9A4395425314f849bD737BAF8208F; address public constant SAVER_EXCHANGE_REGISTRY = 0x25dd3F51e0C3c3Ff164DDC02A8E4D65Bb9cBB12D; address public constant ERC20_PROXY_0X = 0x95E6F48254609A6ee006F7D493c8e5fB97094ceF; address public constant ZRX_ALLOWLIST_ADDR = 0x4BA1f38427b33B8ab7Bb0490200dAE1F1C36823F; function getDecimals(address _token) internal view returns (uint256) { if (_token == KYBER_ETH_ADDRESS) return 18; return ERC20(_token).decimals(); } function getBalance(address _tokenAddr) internal view returns (uint balance) { if (_tokenAddr == KYBER_ETH_ADDRESS) { balance = address(this).balance; } else { balance = ERC20(_tokenAddr).balanceOf(address(this)); } } function approve0xProxy(address _tokenAddr, uint _amount) internal { if (_tokenAddr != KYBER_ETH_ADDRESS) { ERC20(_tokenAddr).safeApprove(address(ERC20_PROXY_0X), _amount); } } function sendLeftover(address _srcAddr, address _destAddr, address payable _to) internal { // send back any leftover ether or tokens if (address(this).balance > 0) { _to.transfer(address(this).balance); } if (getBalance(_srcAddr) > 0) { ERC20(_srcAddr).safeTransfer(_to, getBalance(_srcAddr)); } if (getBalance(_destAddr) > 0) { ERC20(_destAddr).safeTransfer(_to, getBalance(_destAddr)); } } function sliceUint(bytes memory bs, uint256 start) internal pure returns (uint256) { require(bs.length >= start + 32, "slicing out of range"); uint256 x; assembly { x := mload(add(bs, add(0x20, start))) } return x; } } contract SaverExchangeRegistry is AdminAuth { mapping(address => bool) private wrappers; constructor() public { wrappers[0x880A845A85F843a5c67DB2061623c6Fc3bB4c511] = true; wrappers[0x4c9B55f2083629A1F7aDa257ae984E03096eCD25] = true; wrappers[0x42A9237b872368E1bec4Ca8D26A928D7d39d338C] = true; } function addWrapper(address _wrapper) public onlyOwner { wrappers[_wrapper] = true; } function removeWrapper(address _wrapper) public onlyOwner { wrappers[_wrapper] = false; } function isWrapper(address _wrapper) public view returns(bool) { return wrappers[_wrapper]; } } abstract contract CEtherInterface { function mint() external virtual payable; function repayBorrow() external virtual payable; } abstract contract Cat { struct Ilk { address flip; // Liquidator uint256 chop; // Liquidation Penalty [ray] uint256 lump; // Liquidation Quantity [wad] } mapping (bytes32 => Ilk) public ilks; } abstract contract CompoundOracleInterface { function getUnderlyingPrice(address cToken) external view virtual returns (uint); } abstract contract ComptrollerInterface { function enterMarkets(address[] calldata cTokens) external virtual returns (uint256[] memory); function exitMarket(address cToken) external virtual returns (uint256); function getAssetsIn(address account) external virtual view returns (address[] memory); function markets(address account) public virtual view returns (bool, uint256); function getAccountLiquidity(address account) external virtual view returns (uint256, uint256, uint256); function claimComp(address holder) virtual public; function oracle() public virtual view returns (address); } abstract contract DSProxyInterface { /// Truffle wont compile if this isn't commented // function execute(bytes memory _code, bytes memory _data) // public virtual // payable // returns (address, bytes32); function execute(address _target, bytes memory _data) public virtual payable returns (bytes32); function setCache(address _cacheAddr) public virtual payable returns (bool); function owner() public virtual returns (address); } abstract contract GemLike { function approve(address, uint) public virtual; function transfer(address, uint) public virtual; function transferFrom(address, address, uint) public virtual; function deposit() public virtual payable; function withdraw(uint) public virtual; } abstract contract ManagerLike { function cdpCan(address, uint, address) public virtual view returns (uint); function ilks(uint) public virtual view returns (bytes32); function owns(uint) public virtual view returns (address); function urns(uint) public virtual view returns (address); function vat() public virtual view returns (address); function open(bytes32) public virtual returns (uint); function give(uint, address) public virtual; function cdpAllow(uint, address, uint) public virtual; function urnAllow(address, uint) public virtual; function frob(uint, int, int) public virtual; function frob(uint, address, int, int) public virtual; function flux(uint, address, uint) public virtual; function move(uint, address, uint) public virtual; function exit(address, uint, address, uint) public virtual; function quit(uint, address) public virtual; function enter(address, uint) public virtual; function shift(uint, uint) public virtual; } abstract contract VatLike { function can(address, address) public virtual view returns (uint); function ilks(bytes32) public virtual view returns (uint, uint, uint, uint, uint); function dai(address) public virtual view returns (uint); function urns(bytes32, address) public virtual view returns (uint, uint); function frob(bytes32, address, address, address, int, int) public virtual; function hope(address) public virtual; function move(address, address, uint) public virtual; } abstract contract GemJoinLike { function dec() public virtual returns (uint); function gem() public virtual returns (GemLike); function join(address, uint) public virtual payable; function exit(address, uint) public virtual; } abstract contract GNTJoinLike { function bags(address) public virtual view returns (address); function make(address) public virtual returns (address); } abstract contract DaiJoinLike { function vat() public virtual returns (VatLike); function dai() public virtual returns (GemLike); function join(address, uint) public virtual payable; function exit(address, uint) public virtual; } abstract contract HopeLike { function hope(address) public virtual; function nope(address) public virtual; } abstract contract EndLike { function fix(bytes32) public virtual view returns (uint); function cash(bytes32, uint) public virtual; function free(bytes32) public virtual; function pack(uint) public virtual; function skim(bytes32, address) public virtual; } abstract contract JugLike { function drip(bytes32) public virtual; } abstract contract PotLike { function chi() public virtual view returns (uint); function pie(address) public virtual view returns (uint); function drip() public virtual; function join(uint) public virtual; function exit(uint) public virtual; } abstract contract ProxyRegistryLike { function proxies(address) public virtual view returns (address); function build(address) public virtual returns (address); } abstract contract ProxyLike { function owner() public virtual view returns (address); } abstract contract DssProxyActions { function daiJoin_join(address apt, address urn, uint wad) public virtual; function transfer(address gem, address dst, uint wad) public virtual; function ethJoin_join(address apt, address urn) public virtual payable; function gemJoin_join(address apt, address urn, uint wad, bool transferFrom) public virtual payable; function hope(address obj, address usr) public virtual; function nope(address obj, address usr) public virtual; function open(address manager, bytes32 ilk, address usr) public virtual returns (uint cdp); function give(address manager, uint cdp, address usr) public virtual; function giveToProxy(address proxyRegistry, address manager, uint cdp, address dst) public virtual; function cdpAllow(address manager, uint cdp, address usr, uint ok) public virtual; function urnAllow(address manager, address usr, uint ok) public virtual; function flux(address manager, uint cdp, address dst, uint wad) public virtual; function move(address manager, uint cdp, address dst, uint rad) public virtual; function frob(address manager, uint cdp, int dink, int dart) public virtual; function frob(address manager, uint cdp, address dst, int dink, int dart) public virtual; function quit(address manager, uint cdp, address dst) public virtual; function enter(address manager, address src, uint cdp) public virtual; function shift(address manager, uint cdpSrc, uint cdpOrg) public virtual; function makeGemBag(address gemJoin) public virtual returns (address bag); function lockETH(address manager, address ethJoin, uint cdp) public virtual payable; function safeLockETH(address manager, address ethJoin, uint cdp, address owner) public virtual payable; function lockGem(address manager, address gemJoin, uint cdp, uint wad, bool transferFrom) public virtual; function safeLockGem(address manager, address gemJoin, uint cdp, uint wad, bool transferFrom, address owner) public virtual; function freeETH(address manager, address ethJoin, uint cdp, uint wad) public virtual; function freeGem(address manager, address gemJoin, uint cdp, uint wad) public virtual; function draw(address manager, address jug, address daiJoin, uint cdp, uint wad) public virtual; function wipe(address manager, address daiJoin, uint cdp, uint wad) public virtual; function safeWipe(address manager, address daiJoin, uint cdp, uint wad, address owner) public virtual; function wipeAll(address manager, address daiJoin, uint cdp) public virtual; function safeWipeAll(address manager, address daiJoin, uint cdp, address owner) public virtual; function lockETHAndDraw(address manager, address jug, address ethJoin, address daiJoin, uint cdp, uint wadD) public virtual payable; function openLockETHAndDraw(address manager, address jug, address ethJoin, address daiJoin, bytes32 ilk, uint wadD) public virtual payable returns (uint cdp); function lockGemAndDraw(address manager, address jug, address gemJoin, address daiJoin, uint cdp, uint wadC, uint wadD, bool transferFrom) public virtual; function openLockGemAndDraw(address manager, address jug, address gemJoin, address daiJoin, bytes32 ilk, uint wadC, uint wadD, bool transferFrom) public virtual returns (uint cdp); function openLockGNTAndDraw(address manager, address jug, address gntJoin, address daiJoin, bytes32 ilk, uint wadC, uint wadD) public virtual returns (address bag, uint cdp); function wipeAndFreeETH(address manager, address ethJoin, address daiJoin, uint cdp, uint wadC, uint wadD) public virtual; function wipeAllAndFreeETH(address manager, address ethJoin, address daiJoin, uint cdp, uint wadC) public virtual; function wipeAndFreeGem(address manager, address gemJoin, address daiJoin, uint cdp, uint wadC, uint wadD) public virtual; function wipeAllAndFreeGem(address manager, address gemJoin, address daiJoin, uint cdp, uint wadC) public virtual; } abstract contract DaiJoin { function vat() public virtual returns (Vat); function dai() public virtual returns (Gem); function join(address, uint) public virtual payable; function exit(address, uint) public virtual; } abstract contract DssProxyActionsDsr { function join(address daiJoin, address pot, uint wad) virtual public; function exit(address daiJoin, address pot, uint wad) virtual public; function exitAll(address daiJoin, address pot) virtual public; } interface ERC20 { function totalSupply() external view returns (uint256 supply); function balanceOf(address _owner) external view returns (uint256 balance); function transfer(address _to, uint256 _value) external returns (bool success); function transferFrom(address _from, address _to, uint256 _value) external returns (bool success); function approve(address _spender, uint256 _value) external returns (bool success); function allowance(address _owner, address _spender) external view returns (uint256 remaining); function decimals() external view returns (uint256 digits); event Approval(address indexed _owner, address indexed _spender, uint256 _value); } interface ExchangeInterface { function swapEtherToToken(uint256 _ethAmount, address _tokenAddress, uint256 _maxAmount) external payable returns (uint256, uint256); function swapTokenToEther(address _tokenAddress, uint256 _amount, uint256 _maxAmount) external returns (uint256); function swapTokenToToken(address _src, address _dest, uint256 _amount) external payable returns (uint256); function getExpectedRate(address src, address dest, uint256 srcQty) external view returns (uint256 expectedRate); } interface ExchangeInterfaceV2 { function sell(address _srcAddr, address _destAddr, uint _srcAmount) external payable returns (uint); function buy(address _srcAddr, address _destAddr, uint _destAmount) external payable returns(uint); function getSellRate(address _srcAddr, address _destAddr, uint _srcAmount) external view returns (uint); function getBuyRate(address _srcAddr, address _destAddr, uint _srcAmount) external view returns (uint); } abstract contract Faucet { function gulp(address) public virtual; } abstract contract Flipper { function bids(uint _bidId) public virtual returns (uint256, uint256, address, uint48, uint48, address, address, uint256); function tend(uint id, uint lot, uint bid) virtual external; function dent(uint id, uint lot, uint bid) virtual external; function deal(uint id) virtual external; } abstract contract GasTokenInterface is ERC20 { function free(uint256 value) public virtual returns (bool success); function freeUpTo(uint256 value) public virtual returns (uint256 freed); function freeFrom(address from, uint256 value) public virtual returns (bool success); function freeFromUpTo(address from, uint256 value) public virtual returns (uint256 freed); } abstract contract Gem { function dec() virtual public returns (uint); function gem() virtual public returns (Gem); function join(address, uint) virtual public payable; function exit(address, uint) virtual public; function approve(address, uint) virtual public; function transfer(address, uint) virtual public returns (bool); function transferFrom(address, address, uint) virtual public returns (bool); function deposit() virtual public payable; function withdraw(uint) virtual public; function allowance(address, address) virtual public returns (uint); } abstract contract GetCdps { function getCdpsAsc(address manager, address guy) external view virtual returns (uint[] memory ids, address[] memory urns, bytes32[] memory ilks); function getCdpsDesc(address manager, address guy) external view virtual returns (uint[] memory ids, address[] memory urns, bytes32[] memory ilks); } abstract contract IAToken { function redeem(uint256 _amount) external virtual; } abstract contract IAaveSubscription { function subscribe(uint128 _minRatio, uint128 _maxRatio, uint128 _optimalBoost, uint128 _optimalRepay, bool _boostEnabled) public virtual; function unsubscribe() public virtual; } abstract contract ICompoundSubscription { function subscribe(uint128 _minRatio, uint128 _maxRatio, uint128 _optimalBoost, uint128 _optimalRepay, bool _boostEnabled) public virtual; function unsubscribe() public virtual; } abstract contract ILendingPool { function flashLoan( address payable _receiver, address _reserve, uint _amount, bytes calldata _params) external virtual; function deposit(address _reserve, uint256 _amount, uint16 _referralCode) external virtual payable; function setUserUseReserveAsCollateral(address _reserve, bool _useAsCollateral) external virtual; function borrow(address _reserve, uint256 _amount, uint256 _interestRateMode, uint16 _referralCode) external virtual; function repay( address _reserve, uint256 _amount, address payable _onBehalfOf) external virtual payable; function swapBorrowRateMode(address _reserve) external virtual; function getReserves() external virtual view returns(address[] memory); /// @param _reserve underlying token address function getReserveData(address _reserve) external virtual view returns ( uint256 totalLiquidity, // reserve total liquidity uint256 availableLiquidity, // reserve available liquidity for borrowing uint256 totalBorrowsStable, // total amount of outstanding borrows at Stable rate uint256 totalBorrowsVariable, // total amount of outstanding borrows at Variable rate uint256 liquidityRate, // current deposit APY of the reserve for depositors, in Ray units. uint256 variableBorrowRate, // current variable rate APY of the reserve pool, in Ray units. uint256 stableBorrowRate, // current stable rate APY of the reserve pool, in Ray units. uint256 averageStableBorrowRate, // current average stable borrow rate uint256 utilizationRate, // expressed as total borrows/total liquidity. uint256 liquidityIndex, // cumulative liquidity index uint256 variableBorrowIndex, // cumulative variable borrow index address aTokenAddress, // aTokens contract address for the specific _reserve uint40 lastUpdateTimestamp // timestamp of the last update of reserve data ); /// @param _user users address function getUserAccountData(address _user) external virtual view returns ( uint256 totalLiquidityETH, // user aggregated deposits across all the reserves. In Wei uint256 totalCollateralETH, // user aggregated collateral across all the reserves. In Wei uint256 totalBorrowsETH, // user aggregated outstanding borrows across all the reserves. In Wei uint256 totalFeesETH, // user aggregated current outstanding fees in ETH. In Wei uint256 availableBorrowsETH, // user available amount to borrow in ETH uint256 currentLiquidationThreshold, // user current average liquidation threshold across all the collaterals deposited uint256 ltv, // user average Loan-to-Value between all the collaterals uint256 healthFactor // user current Health Factor ); /// @param _reserve underlying token address /// @param _user users address function getUserReserveData(address _reserve, address _user) external virtual view returns ( uint256 currentATokenBalance, // user current reserve aToken balance uint256 currentBorrowBalance, // user current reserve outstanding borrow balance uint256 principalBorrowBalance, // user balance of borrowed asset uint256 borrowRateMode, // user borrow rate mode either Stable or Variable uint256 borrowRate, // user current borrow rate APY uint256 liquidityRate, // user current earn rate on _reserve uint256 originationFee, // user outstanding loan origination fee uint256 variableBorrowIndex, // user variable cumulative index uint256 lastUpdateTimestamp, // Timestamp of the last data update bool usageAsCollateralEnabled // Whether the user's current reserve is enabled as a collateral ); function getReserveConfigurationData(address _reserve) external virtual view returns ( uint256 ltv, uint256 liquidationThreshold, uint256 liquidationBonus, address rateStrategyAddress, bool usageAsCollateralEnabled, bool borrowingEnabled, bool stableBorrowRateEnabled, bool isActive ); // ------------------ LendingPoolCoreData ------------------------ function getReserveATokenAddress(address _reserve) public virtual view returns (address); function getReserveConfiguration(address _reserve) external virtual view returns (uint256, uint256, uint256, bool); function getUserUnderlyingAssetBalance(address _reserve, address _user) public virtual view returns (uint256); function getReserveCurrentLiquidityRate(address _reserve) public virtual view returns (uint256); function getReserveCurrentVariableBorrowRate(address _reserve) public virtual view returns (uint256); function getReserveTotalLiquidity(address _reserve) public virtual view returns (uint256); function getReserveAvailableLiquidity(address _reserve) public virtual view returns (uint256); function getReserveTotalBorrowsVariable(address _reserve) public virtual view returns (uint256); // ---------------- LendingPoolDataProvider --------------------- function calculateUserGlobalData(address _user) public virtual view returns ( uint256 totalLiquidityBalanceETH, uint256 totalCollateralBalanceETH, uint256 totalBorrowBalanceETH, uint256 totalFeesETH, uint256 currentLtv, uint256 currentLiquidationThreshold, uint256 healthFactor, bool healthFactorBelowThreshold ); } abstract contract ILendingPoolAddressesProvider { function getLendingPool() public virtual view returns (address); function getLendingPoolCore() public virtual view returns (address payable); function getLendingPoolConfigurator() public virtual view returns (address); function getLendingPoolDataProvider() public virtual view returns (address); function getLendingPoolParametersProvider() public virtual view returns (address); function getTokenDistributor() public virtual view returns (address); function getFeeProvider() public virtual view returns (address); function getLendingPoolLiquidationManager() public virtual view returns (address); function getLendingPoolManager() public virtual view returns (address); function getPriceOracle() public virtual view returns (address); function getLendingRateOracle() public virtual view returns (address); } abstract contract ILoanShifter { function getLoanAmount(uint, address) public virtual returns (uint); function getUnderlyingAsset(address _addr) public view virtual returns (address); } abstract contract IPriceOracleGetterAave { function getAssetPrice(address _asset) external virtual view returns (uint256); function getAssetsPrices(address[] calldata _assets) external virtual view returns(uint256[] memory); function getSourceOfAsset(address _asset) external virtual view returns(address); function getFallbackOracle() external virtual view returns(address); } abstract contract ITokenInterface is ERC20 { function assetBalanceOf(address _owner) public virtual view returns (uint256); function mint(address receiver, uint256 depositAmount) external virtual returns (uint256 mintAmount); function burn(address receiver, uint256 burnAmount) external virtual returns (uint256 loanAmountPaid); function tokenPrice() public virtual view returns (uint256 price); } abstract contract Join { bytes32 public ilk; function dec() virtual public view returns (uint); function gem() virtual public view returns (Gem); function join(address, uint) virtual public payable; function exit(address, uint) virtual public; } abstract contract Jug { struct Ilk { uint256 duty; uint256 rho; } mapping (bytes32 => Ilk) public ilks; function drip(bytes32) public virtual returns (uint); } abstract contract KyberNetworkProxyInterface { function maxGasPrice() external virtual view returns (uint256); function getUserCapInWei(address user) external virtual view returns (uint256); function getUserCapInTokenWei(address user, ERC20 token) external virtual view returns (uint256); function enabled() external virtual view returns (bool); function info(bytes32 id) external virtual view returns (uint256); function getExpectedRate(ERC20 src, ERC20 dest, uint256 srcQty) public virtual view returns (uint256 expectedRate, uint256 slippageRate); function tradeWithHint( ERC20 src, uint256 srcAmount, ERC20 dest, address destAddress, uint256 maxDestAmount, uint256 minConversionRate, address walletId, bytes memory hint ) public virtual payable returns (uint256); function trade( ERC20 src, uint256 srcAmount, ERC20 dest, address destAddress, uint256 maxDestAmount, uint256 minConversionRate, address walletId ) public virtual payable returns (uint256); function swapEtherToToken(ERC20 token, uint256 minConversionRate) external virtual payable returns (uint256); function swapTokenToEther(ERC20 token, uint256 tokenQty, uint256 minRate) external virtual payable returns (uint256); function swapTokenToToken(ERC20 src, uint256 srcAmount, ERC20 dest, uint256 minConversionRate) public virtual returns (uint256); } abstract contract Manager { function last(address) virtual public returns (uint); function cdpCan(address, uint, address) virtual public view returns (uint); function ilks(uint) virtual public view returns (bytes32); function owns(uint) virtual public view returns (address); function urns(uint) virtual public view returns (address); function vat() virtual public view returns (address); function open(bytes32, address) virtual public returns (uint); function give(uint, address) virtual public; function cdpAllow(uint, address, uint) virtual public; function urnAllow(address, uint) virtual public; function frob(uint, int, int) virtual public; function flux(uint, address, uint) virtual public; function move(uint, address, uint) virtual public; function exit(address, uint, address, uint) virtual public; function quit(uint, address) virtual public; function enter(address, uint) virtual public; function shift(uint, uint) virtual public; } abstract contract OasisInterface { function getBuyAmount(address tokenToBuy, address tokenToPay, uint256 amountToPay) external virtual view returns (uint256 amountBought); function getPayAmount(address tokenToPay, address tokenToBuy, uint256 amountToBuy) public virtual view returns (uint256 amountPaid); function sellAllAmount(address pay_gem, uint256 pay_amt, address buy_gem, uint256 min_fill_amount) public virtual returns (uint256 fill_amt); function buyAllAmount(address buy_gem, uint256 buy_amt, address pay_gem, uint256 max_fill_amount) public virtual returns (uint256 fill_amt); } abstract contract Osm { mapping(address => uint256) public bud; function peep() external view virtual returns (bytes32, bool); } abstract contract OsmMom { mapping (bytes32 => address) public osms; } abstract contract OtcInterface { function buyAllAmount(address, uint256, address, uint256) public virtual returns (uint256); function getPayAmount(address, address, uint256) public virtual view returns (uint256); function getBuyAmount(address, address, uint256) public virtual view returns (uint256); } abstract contract PipInterface { function read() public virtual returns (bytes32); } abstract contract ProxyRegistryInterface { function proxies(address _owner) public virtual view returns (address); function build(address) public virtual returns (address); } abstract contract SaverExchangeInterface { function getBestPrice( uint256 _amount, address _srcToken, address _destToken, uint256 _exchangeType ) public view virtual returns (address, uint256); } abstract contract Spotter { struct Ilk { PipInterface pip; uint256 mat; } mapping (bytes32 => Ilk) public ilks; uint256 public par; } abstract contract TokenInterface { function allowance(address, address) public virtual returns (uint256); function balanceOf(address) public virtual returns (uint256); function approve(address, uint256) public virtual; function transfer(address, uint256) public virtual returns (bool); function transferFrom(address, address, uint256) public virtual returns (bool); function deposit() public virtual payable; function withdraw(uint256) public virtual; } abstract contract UniswapExchangeInterface { function getEthToTokenInputPrice(uint256 eth_sold) external virtual view returns (uint256 tokens_bought); function getEthToTokenOutputPrice(uint256 tokens_bought) external virtual view returns (uint256 eth_sold); function getTokenToEthInputPrice(uint256 tokens_sold) external virtual view returns (uint256 eth_bought); function getTokenToEthOutputPrice(uint256 eth_bought) external virtual view returns (uint256 tokens_sold); function tokenToEthTransferInput( uint256 tokens_sold, uint256 min_eth, uint256 deadline, address recipient ) external virtual returns (uint256 eth_bought); function ethToTokenTransferInput(uint256 min_tokens, uint256 deadline, address recipient) external virtual payable returns (uint256 tokens_bought); function tokenToTokenTransferInput( uint256 tokens_sold, uint256 min_tokens_bought, uint256 min_eth_bought, uint256 deadline, address recipient, address token_addr ) external virtual returns (uint256 tokens_bought); function ethToTokenTransferOutput( uint256 tokens_bought, uint256 deadline, address recipient ) external virtual payable returns (uint256 eth_sold); function tokenToEthTransferOutput( uint256 eth_bought, uint256 max_tokens, uint256 deadline, address recipient ) external virtual returns (uint256 tokens_sold); function tokenToTokenTransferOutput( uint256 tokens_bought, uint256 max_tokens_sold, uint256 max_eth_sold, uint256 deadline, address recipient, address token_addr ) external virtual returns (uint256 tokens_sold); } abstract contract UniswapFactoryInterface { function getExchange(address token) external view virtual returns (address exchange); } abstract contract UniswapRouterInterface { function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline) external virtual returns (uint[] memory amounts); function swapExactTokensForTokens( uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline ) external virtual returns (uint[] memory amounts); function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline) external virtual returns (uint[] memory amounts); function swapTokensForExactTokens( uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline ) external virtual returns (uint[] memory amounts); function getAmountsOut(uint amountIn, address[] memory path) public virtual view returns (uint[] memory amounts); function getAmountsIn(uint amountOut, address[] memory path) public virtual view returns (uint[] memory amounts); } abstract contract Vat { struct Urn { uint256 ink; // Locked Collateral [wad] uint256 art; // Normalised Debt [wad] } struct Ilk { uint256 Art; // Total Normalised Debt [wad] uint256 rate; // Accumulated Rates [ray] uint256 spot; // Price with Safety Margin [ray] uint256 line; // Debt Ceiling [rad] uint256 dust; // Urn Debt Floor [rad] } mapping (bytes32 => mapping (address => Urn )) public urns; mapping (bytes32 => Ilk) public ilks; mapping (bytes32 => mapping (address => uint)) public gem; // [wad] function can(address, address) virtual public view returns (uint); function dai(address) virtual public view returns (uint); function frob(bytes32, address, address, address, int, int) virtual public; function hope(address) virtual public; function move(address, address, uint) virtual public; function fork(bytes32, address, address, int, int) virtual public; } contract DefisaverLogger { event LogEvent( address indexed contractAddress, address indexed caller, string indexed logName, bytes data ); // solhint-disable-next-line func-name-mixedcase function Log(address _contract, address _caller, string memory _logName, bytes memory _data) public { emit LogEvent(_contract, _caller, _logName, _data); } } contract MCDMonitorProxyV2 is AdminAuth { uint public CHANGE_PERIOD; address public monitor; address public newMonitor; address public lastMonitor; uint public changeRequestedTimestamp; mapping(address => bool) public allowed; event MonitorChangeInitiated(address oldMonitor, address newMonitor); event MonitorChangeCanceled(); event MonitorChangeFinished(address monitor); event MonitorChangeReverted(address monitor); // if someone who is allowed become malicious, owner can't be changed modifier onlyAllowed() { require(allowed[msg.sender] || msg.sender == owner); _; } modifier onlyMonitor() { require (msg.sender == monitor); _; } constructor(uint _changePeriod) public { CHANGE_PERIOD = _changePeriod * 1 days; } /// @notice Only monitor contract is able to call execute on users proxy /// @param _owner Address of cdp owner (users DSProxy address) /// @param _saverProxy Address of MCDSaverProxy /// @param _data Data to send to MCDSaverProxy function callExecute(address _owner, address _saverProxy, bytes memory _data) public payable onlyMonitor { // execute reverts if calling specific method fails DSProxyInterface(_owner).execute{value: msg.value}(_saverProxy, _data); // return if anything left if (address(this).balance > 0) { msg.sender.transfer(address(this).balance); } } /// @notice Allowed users are able to set Monitor contract without any waiting period first time /// @param _monitor Address of Monitor contract function setMonitor(address _monitor) public onlyAllowed { require(monitor == address(0)); monitor = _monitor; } /// @notice Allowed users are able to start procedure for changing monitor /// @dev after CHANGE_PERIOD needs to call confirmNewMonitor to actually make a change /// @param _newMonitor address of new monitor function changeMonitor(address _newMonitor) public onlyAllowed { require(changeRequestedTimestamp == 0); changeRequestedTimestamp = now; lastMonitor = monitor; newMonitor = _newMonitor; emit MonitorChangeInitiated(lastMonitor, newMonitor); } /// @notice At any point allowed users are able to cancel monitor change function cancelMonitorChange() public onlyAllowed { require(changeRequestedTimestamp > 0); changeRequestedTimestamp = 0; newMonitor = address(0); emit MonitorChangeCanceled(); } /// @notice Anyone is able to confirm new monitor after CHANGE_PERIOD if process is started function confirmNewMonitor() public onlyAllowed { require((changeRequestedTimestamp + CHANGE_PERIOD) < now); require(changeRequestedTimestamp != 0); require(newMonitor != address(0)); monitor = newMonitor; newMonitor = address(0); changeRequestedTimestamp = 0; emit MonitorChangeFinished(monitor); } /// @notice Its possible to revert monitor to last used monitor function revertMonitor() public onlyAllowed { require(lastMonitor != address(0)); monitor = lastMonitor; emit MonitorChangeReverted(monitor); } /// @notice Allowed users are able to add new allowed user /// @param _user Address of user that will be allowed function addAllowed(address _user) public onlyAllowed { allowed[_user] = true; } /// @notice Allowed users are able to remove allowed user /// @dev owner is always allowed even if someone tries to remove it from allowed mapping /// @param _user Address of allowed user function removeAllowed(address _user) public onlyAllowed { allowed[_user] = false; } function setChangePeriod(uint _periodInDays) public onlyAllowed { require(_periodInDays * 1 days > CHANGE_PERIOD); CHANGE_PERIOD = _periodInDays * 1 days; } } contract MCDPriceVerifier is AdminAuth { OsmMom public osmMom = OsmMom(0x76416A4d5190d071bfed309861527431304aA14f); Manager public manager = Manager(0x5ef30b9986345249bc32d8928B7ee64DE9435E39); mapping(address => bool) public authorized; function verifyVaultNextPrice(uint _nextPrice, uint _cdpId) public view returns(bool) { require(authorized[msg.sender]); bytes32 ilk = manager.ilks(_cdpId); return verifyNextPrice(_nextPrice, ilk); } function verifyNextPrice(uint _nextPrice, bytes32 _ilk) public view returns(bool) { require(authorized[msg.sender]); address osmAddress = osmMom.osms(_ilk); uint whitelisted = Osm(osmAddress).bud(address(this)); // If contracts doesn't have access return true if (whitelisted != 1) return true; (bytes32 price, bool has) = Osm(osmAddress).peep(); return has ? uint(price) == _nextPrice : false; } function setAuthorized(address _address, bool _allowed) public onlyOwner { authorized[_address] = _allowed; } } abstract contract StaticV2 { enum Method { Boost, Repay } struct CdpHolder { uint128 minRatio; uint128 maxRatio; uint128 optimalRatioBoost; uint128 optimalRatioRepay; address owner; uint cdpId; bool boostEnabled; bool nextPriceEnabled; } struct SubPosition { uint arrPos; bool subscribed; } } contract SubscriptionsInterfaceV2 { function subscribe(uint _cdpId, uint128 _minRatio, uint128 _maxRatio, uint128 _optimalBoost, uint128 _optimalRepay, bool _boostEnabled, bool _nextPriceEnabled) external {} function unsubscribe(uint _cdpId) external {} } contract SubscriptionsProxyV2 { address public constant MONITOR_PROXY_ADDRESS = 0x7456f4218874eAe1aF8B83a64848A1B89fEB7d7C; address public constant OLD_SUBSCRIPTION = 0x83152CAA0d344a2Fd428769529e2d490A88f4393; address public constant FACTORY_ADDRESS = 0x5a15566417e6C1c9546523066500bDDBc53F88C7; function migrate(uint _cdpId, uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled, bool _nextPriceEnabled, address _subscriptions) public { SubscriptionsInterfaceV2(OLD_SUBSCRIPTION).unsubscribe(_cdpId); subscribe(_cdpId, _minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled, _nextPriceEnabled, _subscriptions); } function subscribe(uint _cdpId, uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled, bool _nextPriceEnabled, address _subscriptions) public { address currAuthority = address(DSAuth(address(this)).authority()); DSGuard guard = DSGuard(currAuthority); if (currAuthority == address(0)) { guard = DSGuardFactory(FACTORY_ADDRESS).newGuard(); DSAuth(address(this)).setAuthority(DSAuthority(address(guard))); } guard.permit(MONITOR_PROXY_ADDRESS, address(this), bytes4(keccak256("execute(address,bytes)"))); SubscriptionsInterfaceV2(_subscriptions).subscribe(_cdpId, _minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled, _nextPriceEnabled); } function update(uint _cdpId, uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled, bool _nextPriceEnabled, address _subscriptions) public { SubscriptionsInterfaceV2(_subscriptions).subscribe(_cdpId, _minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled, _nextPriceEnabled); } function unsubscribe(uint _cdpId, address _subscriptions) public { SubscriptionsInterfaceV2(_subscriptions).unsubscribe(_cdpId); } } contract SubscriptionsV2 is AdminAuth, StaticV2 { bytes32 internal constant ETH_ILK = 0x4554482d41000000000000000000000000000000000000000000000000000000; bytes32 internal constant BAT_ILK = 0x4241542d41000000000000000000000000000000000000000000000000000000; address public constant MANAGER_ADDRESS = 0x5ef30b9986345249bc32d8928B7ee64DE9435E39; address public constant VAT_ADDRESS = 0x35D1b3F3D7966A1DFe207aa4514C12a259A0492B; address public constant SPOTTER_ADDRESS = 0x65C79fcB50Ca1594B025960e539eD7A9a6D434A3; CdpHolder[] public subscribers; mapping (uint => SubPosition) public subscribersPos; mapping (bytes32 => uint) public minLimits; uint public changeIndex; Manager public manager = Manager(MANAGER_ADDRESS); Vat public vat = Vat(VAT_ADDRESS); Spotter public spotter = Spotter(SPOTTER_ADDRESS); MCDSaverProxy public saverProxy; event Subscribed(address indexed owner, uint cdpId); event Unsubscribed(address indexed owner, uint cdpId); event Updated(address indexed owner, uint cdpId); event ParamUpdates(address indexed owner, uint cdpId, uint128, uint128, uint128, uint128, bool boostEnabled); /// @param _saverProxy Address of the MCDSaverProxy contract constructor(address _saverProxy) public { saverProxy = MCDSaverProxy(payable(_saverProxy)); minLimits[ETH_ILK] = 1700000000000000000; minLimits[BAT_ILK] = 1700000000000000000; } /// @dev Called by the DSProxy contract which owns the CDP /// @notice Adds the users CDP in the list of subscriptions so it can be monitored /// @param _cdpId Id of the CDP /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalBoost Ratio amount which boost should target /// @param _optimalRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled /// @param _nextPriceEnabled Boolean determing if we can use nextPrice for this cdp function subscribe(uint _cdpId, uint128 _minRatio, uint128 _maxRatio, uint128 _optimalBoost, uint128 _optimalRepay, bool _boostEnabled, bool _nextPriceEnabled) external { require(isOwner(msg.sender, _cdpId), "Must be called by Cdp owner"); // if boost is not enabled, set max ratio to max uint uint128 localMaxRatio = _boostEnabled ? _maxRatio : uint128(-1); require(checkParams(manager.ilks(_cdpId), _minRatio, localMaxRatio), "Must be correct params"); SubPosition storage subInfo = subscribersPos[_cdpId]; CdpHolder memory subscription = CdpHolder({ minRatio: _minRatio, maxRatio: localMaxRatio, optimalRatioBoost: _optimalBoost, optimalRatioRepay: _optimalRepay, owner: msg.sender, cdpId: _cdpId, boostEnabled: _boostEnabled, nextPriceEnabled: _nextPriceEnabled }); changeIndex++; if (subInfo.subscribed) { subscribers[subInfo.arrPos] = subscription; emit Updated(msg.sender, _cdpId); emit ParamUpdates(msg.sender, _cdpId, _minRatio, localMaxRatio, _optimalBoost, _optimalRepay, _boostEnabled); } else { subscribers.push(subscription); subInfo.arrPos = subscribers.length - 1; subInfo.subscribed = true; emit Subscribed(msg.sender, _cdpId); } } /// @notice Called by the users DSProxy /// @dev Owner who subscribed cancels his subscription function unsubscribe(uint _cdpId) external { require(isOwner(msg.sender, _cdpId), "Must be called by Cdp owner"); _unsubscribe(_cdpId); } /// @dev Checks if the _owner is the owner of the CDP function isOwner(address _owner, uint _cdpId) internal view returns (bool) { return getOwner(_cdpId) == _owner; } /// @dev Checks limit for minimum ratio and if minRatio is bigger than max function checkParams(bytes32 _ilk, uint128 _minRatio, uint128 _maxRatio) internal view returns (bool) { if (_minRatio < minLimits[_ilk]) { return false; } if (_minRatio > _maxRatio) { return false; } return true; } /// @dev Internal method to remove a subscriber from the list function _unsubscribe(uint _cdpId) internal { require(subscribers.length > 0, "Must have subscribers in the list"); SubPosition storage subInfo = subscribersPos[_cdpId]; require(subInfo.subscribed, "Must first be subscribed"); uint lastCdpId = subscribers[subscribers.length - 1].cdpId; SubPosition storage subInfo2 = subscribersPos[lastCdpId]; subInfo2.arrPos = subInfo.arrPos; subscribers[subInfo.arrPos] = subscribers[subscribers.length - 1]; subscribers.pop(); changeIndex++; subInfo.subscribed = false; subInfo.arrPos = 0; emit Unsubscribed(msg.sender, _cdpId); } /// @notice Returns an address that owns the CDP /// @param _cdpId Id of the CDP function getOwner(uint _cdpId) public view returns(address) { return manager.owns(_cdpId); } /// @notice Helper method for the front to get all the info about the subscribed CDP function getSubscribedInfo(uint _cdpId) public view returns(bool, uint128, uint128, uint128, uint128, address, uint coll, uint debt) { SubPosition memory subInfo = subscribersPos[_cdpId]; if (!subInfo.subscribed) return (false, 0, 0, 0, 0, address(0), 0, 0); (coll, debt) = saverProxy.getCdpInfo(manager, _cdpId, manager.ilks(_cdpId)); CdpHolder memory subscriber = subscribers[subInfo.arrPos]; return ( true, subscriber.minRatio, subscriber.maxRatio, subscriber.optimalRatioRepay, subscriber.optimalRatioBoost, subscriber.owner, coll, debt ); } function getCdpHolder(uint _cdpId) public view returns (bool subscribed, CdpHolder memory) { SubPosition memory subInfo = subscribersPos[_cdpId]; if (!subInfo.subscribed) return (false, CdpHolder(0, 0, 0, 0, address(0), 0, false, false)); CdpHolder memory subscriber = subscribers[subInfo.arrPos]; return (true, subscriber); } /// @notice Helper method for the front to get the information about the ilk of a CDP function getIlkInfo(bytes32 _ilk, uint _cdpId) public view returns(bytes32 ilk, uint art, uint rate, uint spot, uint line, uint dust, uint mat, uint par) { // send either ilk or cdpId if (_ilk == bytes32(0)) { _ilk = manager.ilks(_cdpId); } ilk = _ilk; (,mat) = spotter.ilks(_ilk); par = spotter.par(); (art, rate, spot, line, dust) = vat.ilks(_ilk); } /// @notice Helper method to return all the subscribed CDPs function getSubscribers() public view returns (CdpHolder[] memory) { return subscribers; } /// @notice Helper method to return all the subscribed CDPs function getSubscribersByPage(uint _page, uint _perPage) public view returns (CdpHolder[] memory) { CdpHolder[] memory holders = new CdpHolder[](_perPage); uint start = _page * _perPage; uint end = start + _perPage; uint count = 0; for (uint i=start; i<end; i++) { holders[count] = subscribers[i]; count++; } return holders; } ////////////// ADMIN METHODS /////////////////// /// @notice Admin function to change a min. limit for an asset function changeMinRatios(bytes32 _ilk, uint _newRatio) public onlyOwner { minLimits[_ilk] = _newRatio; } /// @notice Admin function to unsubscribe a CDP function unsubscribeByAdmin(uint _cdpId) public onlyOwner { SubPosition storage subInfo = subscribersPos[_cdpId]; if (subInfo.subscribed) { _unsubscribe(_cdpId); } } } contract BidProxy { address public constant DAI_JOIN = 0x9759A6Ac90977b93B58547b4A71c78317f391A28; address public constant VAT_ADDRESS = 0x35D1b3F3D7966A1DFe207aa4514C12a259A0492B; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; function daiBid(uint _bidId, uint _amount, address _flipper) public { uint tendAmount = _amount * (10 ** 27); joinDai(_amount); (, uint lot, , , , , , ) = Flipper(_flipper).bids(_bidId); Vat(VAT_ADDRESS).hope(_flipper); Flipper(_flipper).tend(_bidId, lot, tendAmount); } function collateralBid(uint _bidId, uint _amount, address _flipper) public { (uint bid, , , , , , , ) = Flipper(_flipper).bids(_bidId); joinDai(bid / (10**27)); Vat(VAT_ADDRESS).hope(_flipper); Flipper(_flipper).dent(_bidId, _amount, bid); } function closeBid(uint _bidId, address _flipper, address _joinAddr) public { bytes32 ilk = Join(_joinAddr).ilk(); Flipper(_flipper).deal(_bidId); uint amount = Vat(VAT_ADDRESS).gem(ilk, address(this)); Vat(VAT_ADDRESS).hope(_joinAddr); Gem(_joinAddr).exit(msg.sender, amount); } function exitCollateral(address _joinAddr) public { bytes32 ilk = Join(_joinAddr).ilk(); uint amount = Vat(VAT_ADDRESS).gem(ilk, address(this)); Vat(VAT_ADDRESS).hope(_joinAddr); Gem(_joinAddr).exit(msg.sender, amount); } function exitDai() public { uint amount = Vat(VAT_ADDRESS).dai(address(this)) / (10**27); Vat(VAT_ADDRESS).hope(DAI_JOIN); Gem(DAI_JOIN).exit(msg.sender, amount); } function withdrawToken(address _token) public { uint balance = ERC20(_token).balanceOf(address(this)); ERC20(_token).transfer(msg.sender, balance); } function withdrawEth() public { uint balance = address(this).balance; msg.sender.transfer(balance); } function joinDai(uint _amount) internal { uint amountInVat = Vat(VAT_ADDRESS).dai(address(this)) / (10**27); if (_amount > amountInVat) { uint amountDiff = (_amount - amountInVat) + 1; ERC20(DAI_ADDRESS).transferFrom(msg.sender, address(this), amountDiff); ERC20(DAI_ADDRESS).approve(DAI_JOIN, amountDiff); Join(DAI_JOIN).join(address(this), amountDiff); } } } abstract contract IMCDSubscriptions { function unsubscribe(uint256 _cdpId) external virtual ; function subscribersPos(uint256 _cdpId) external virtual returns (uint256, bool); } abstract contract GemLike { function approve(address, uint256) public virtual; function transfer(address, uint256) public virtual; function transferFrom(address, address, uint256) public virtual; function deposit() public virtual payable; function withdraw(uint256) public virtual; } abstract contract ManagerLike { function cdpCan(address, uint256, address) public virtual view returns (uint256); function ilks(uint256) public virtual view returns (bytes32); function owns(uint256) public virtual view returns (address); function urns(uint256) public virtual view returns (address); function vat() public virtual view returns (address); function open(bytes32, address) public virtual returns (uint256); function give(uint256, address) public virtual; function cdpAllow(uint256, address, uint256) public virtual; function urnAllow(address, uint256) public virtual; function frob(uint256, int256, int256) public virtual; function flux(uint256, address, uint256) public virtual; function move(uint256, address, uint256) public virtual; function exit(address, uint256, address, uint256) public virtual; function quit(uint256, address) public virtual; function enter(address, uint256) public virtual; function shift(uint256, uint256) public virtual; } abstract contract VatLike { function can(address, address) public virtual view returns (uint256); function ilks(bytes32) public virtual view returns (uint256, uint256, uint256, uint256, uint256); function dai(address) public virtual view returns (uint256); function urns(bytes32, address) public virtual view returns (uint256, uint256); function frob(bytes32, address, address, address, int256, int256) public virtual; function hope(address) public virtual; function move(address, address, uint256) public virtual; } abstract contract GemJoinLike { function dec() public virtual returns (uint256); function gem() public virtual returns (GemLike); function join(address, uint256) public virtual payable; function exit(address, uint256) public virtual; } abstract contract GNTJoinLike { function bags(address) public virtual view returns (address); function make(address) public virtual returns (address); } abstract contract DaiJoinLike { function vat() public virtual returns (VatLike); function dai() public virtual returns (GemLike); function join(address, uint256) public virtual payable; function exit(address, uint256) public virtual; } abstract contract HopeLike { function hope(address) public virtual; function nope(address) public virtual; } abstract contract ProxyRegistryInterface { function build(address) public virtual returns (address); } abstract contract EndLike { function fix(bytes32) public virtual view returns (uint256); function cash(bytes32, uint256) public virtual; function free(bytes32) public virtual; function pack(uint256) public virtual; function skim(bytes32, address) public virtual; } abstract contract JugLike { function drip(bytes32) public virtual returns (uint256); } abstract contract PotLike { function pie(address) public virtual view returns (uint256); function drip() public virtual returns (uint256); function join(uint256) public virtual; function exit(uint256) public virtual; } abstract contract ProxyRegistryLike { function proxies(address) public virtual view returns (address); function build(address) public virtual returns (address); } abstract contract ProxyLike { function owner() public virtual view returns (address); } contract Common { uint256 constant RAY = 10**27; // Internal functions function mul(uint256 x, uint256 y) internal pure returns (uint256 z) { require(y == 0 || (z = x * y) / y == x, "mul-overflow"); } // Public functions // solhint-disable-next-line func-name-mixedcase function daiJoin_join(address apt, address urn, uint256 wad) public { // Gets DAI from the user's wallet DaiJoinLike(apt).dai().transferFrom(msg.sender, address(this), wad); // Approves adapter to take the DAI amount DaiJoinLike(apt).dai().approve(apt, wad); // Joins DAI into the vat DaiJoinLike(apt).join(urn, wad); } } contract MCDCreateProxyActions is Common { // Internal functions function sub(uint256 x, uint256 y) internal pure returns (uint256 z) { require((z = x - y) <= x, "sub-overflow"); } function toInt(uint256 x) internal pure returns (int256 y) { y = int256(x); require(y >= 0, "int-overflow"); } function toRad(uint256 wad) internal pure returns (uint256 rad) { rad = mul(wad, 10**27); } function convertTo18(address gemJoin, uint256 amt) internal returns (uint256 wad) { // For those collaterals that have less than 18 decimals precision we need to do the conversion before passing to frob function // Adapters will automatically handle the difference of precision wad = mul(amt, 10**(18 - GemJoinLike(gemJoin).dec())); } function _getDrawDart(address vat, address jug, address urn, bytes32 ilk, uint256 wad) internal returns (int256 dart) { // Updates stability fee rate uint256 rate = JugLike(jug).drip(ilk); // Gets DAI balance of the urn in the vat uint256 dai = VatLike(vat).dai(urn); // If there was already enough DAI in the vat balance, just exits it without adding more debt if (dai < mul(wad, RAY)) { // Calculates the needed dart so together with the existing dai in the vat is enough to exit wad amount of DAI tokens dart = toInt(sub(mul(wad, RAY), dai) / rate); // This is neeeded due lack of precision. It might need to sum an extra dart wei (for the given DAI wad amount) dart = mul(uint256(dart), rate) < mul(wad, RAY) ? dart + 1 : dart; } } function _getWipeDart(address vat, uint256 dai, address urn, bytes32 ilk) internal view returns (int256 dart) { // Gets actual rate from the vat (, uint256 rate, , , ) = VatLike(vat).ilks(ilk); // Gets actual art value of the urn (, uint256 art) = VatLike(vat).urns(ilk, urn); // Uses the whole dai balance in the vat to reduce the debt dart = toInt(dai / rate); // Checks the calculated dart is not higher than urn.art (total debt), otherwise uses its value dart = uint256(dart) <= art ? -dart : -toInt(art); } function _getWipeAllWad(address vat, address usr, address urn, bytes32 ilk) internal view returns (uint256 wad) { // Gets actual rate from the vat (, uint256 rate, , , ) = VatLike(vat).ilks(ilk); // Gets actual art value of the urn (, uint256 art) = VatLike(vat).urns(ilk, urn); // Gets actual dai amount in the urn uint256 dai = VatLike(vat).dai(usr); uint256 rad = sub(mul(art, rate), dai); wad = rad / RAY; // If the rad precision has some dust, it will need to request for 1 extra wad wei wad = mul(wad, RAY) < rad ? wad + 1 : wad; } // Public functions function transfer(address gem, address dst, uint256 wad) public { GemLike(gem).transfer(dst, wad); } // solhint-disable-next-line func-name-mixedcase function ethJoin_join(address apt, address urn) public payable { // Wraps ETH in WETH GemJoinLike(apt).gem().deposit{value: msg.value}(); // Approves adapter to take the WETH amount GemJoinLike(apt).gem().approve(address(apt), msg.value); // Joins WETH collateral into the vat GemJoinLike(apt).join(urn, msg.value); } // solhint-disable-next-line func-name-mixedcase function gemJoin_join(address apt, address urn, uint256 wad, bool transferFrom) public { // Only executes for tokens that have approval/transferFrom implementation if (transferFrom) { // Gets token from the user's wallet GemJoinLike(apt).gem().transferFrom(msg.sender, address(this), wad); // Approves adapter to take the token amount GemJoinLike(apt).gem().approve(apt, 0); GemJoinLike(apt).gem().approve(apt, wad); } // Joins token collateral into the vat GemJoinLike(apt).join(urn, wad); } function hope(address obj, address usr) public { HopeLike(obj).hope(usr); } function nope(address obj, address usr) public { HopeLike(obj).nope(usr); } function open(address manager, bytes32 ilk, address usr) public returns (uint256 cdp) { cdp = ManagerLike(manager).open(ilk, usr); } function give(address manager, uint256 cdp, address usr) public { ManagerLike(manager).give(cdp, usr); } function move(address manager, uint256 cdp, address dst, uint256 rad) public { ManagerLike(manager).move(cdp, dst, rad); } function frob(address manager, uint256 cdp, int256 dink, int256 dart) public { ManagerLike(manager).frob(cdp, dink, dart); } function lockETH(address manager, address ethJoin, uint256 cdp) public payable { // Receives ETH amount, converts it to WETH and joins it into the vat ethJoin_join(ethJoin, address(this)); // Locks WETH amount into the CDP VatLike(ManagerLike(manager).vat()).frob( ManagerLike(manager).ilks(cdp), ManagerLike(manager).urns(cdp), address(this), address(this), toInt(msg.value), 0 ); } function lockGem(address manager, address gemJoin, uint256 cdp, uint256 wad, bool transferFrom) public { // Takes token amount from user's wallet and joins into the vat gemJoin_join(gemJoin, address(this), wad, transferFrom); // Locks token amount into the CDP VatLike(ManagerLike(manager).vat()).frob( ManagerLike(manager).ilks(cdp), ManagerLike(manager).urns(cdp), address(this), address(this), toInt(convertTo18(gemJoin, wad)), 0 ); } function draw(address manager, address jug, address daiJoin, uint256 cdp, uint256 wad) public { address urn = ManagerLike(manager).urns(cdp); address vat = ManagerLike(manager).vat(); bytes32 ilk = ManagerLike(manager).ilks(cdp); // Generates debt in the CDP frob(manager, cdp, 0, _getDrawDart(vat, jug, urn, ilk, wad)); // Moves the DAI amount (balance in the vat in rad) to proxy's address move(manager, cdp, address(this), toRad(wad)); // Allows adapter to access to proxy's DAI balance in the vat if (VatLike(vat).can(address(this), address(daiJoin)) == 0) { VatLike(vat).hope(daiJoin); } // Exits DAI to the user's wallet as a token DaiJoinLike(daiJoin).exit(msg.sender, wad); } function lockETHAndDraw( address manager, address jug, address ethJoin, address daiJoin, uint256 cdp, uint256 wadD ) public payable { address urn = ManagerLike(manager).urns(cdp); address vat = ManagerLike(manager).vat(); bytes32 ilk = ManagerLike(manager).ilks(cdp); // Receives ETH amount, converts it to WETH and joins it into the vat ethJoin_join(ethJoin, urn); // Locks WETH amount into the CDP and generates debt frob(manager, cdp, toInt(msg.value), _getDrawDart(vat, jug, urn, ilk, wadD)); // Moves the DAI amount (balance in the vat in rad) to proxy's address move(manager, cdp, address(this), toRad(wadD)); // Allows adapter to access to proxy's DAI balance in the vat if (VatLike(vat).can(address(this), address(daiJoin)) == 0) { VatLike(vat).hope(daiJoin); } // Exits DAI to the user's wallet as a token DaiJoinLike(daiJoin).exit(msg.sender, wadD); } function openLockETHAndDraw( address manager, address jug, address ethJoin, address daiJoin, bytes32 ilk, uint256 wadD, address owner ) public payable returns (uint256 cdp) { cdp = open(manager, ilk, address(this)); lockETHAndDraw(manager, jug, ethJoin, daiJoin, cdp, wadD); give(manager, cdp, owner); } function lockGemAndDraw( address manager, address jug, address gemJoin, address daiJoin, uint256 cdp, uint256 wadC, uint256 wadD, bool transferFrom ) public { address urn = ManagerLike(manager).urns(cdp); address vat = ManagerLike(manager).vat(); bytes32 ilk = ManagerLike(manager).ilks(cdp); // Takes token amount from user's wallet and joins into the vat gemJoin_join(gemJoin, urn, wadC, transferFrom); // Locks token amount into the CDP and generates debt frob( manager, cdp, toInt(convertTo18(gemJoin, wadC)), _getDrawDart(vat, jug, urn, ilk, wadD) ); // Moves the DAI amount (balance in the vat in rad) to proxy's address move(manager, cdp, address(this), toRad(wadD)); // Allows adapter to access to proxy's DAI balance in the vat if (VatLike(vat).can(address(this), address(daiJoin)) == 0) { VatLike(vat).hope(daiJoin); } // Exits DAI to the user's wallet as a token DaiJoinLike(daiJoin).exit(msg.sender, wadD); } function openLockGemAndDraw( address manager, address jug, address gemJoin, address daiJoin, bytes32 ilk, uint256 wadC, uint256 wadD, bool transferFrom, address owner ) public returns (uint256 cdp) { cdp = open(manager, ilk, address(this)); lockGemAndDraw(manager, jug, gemJoin, daiJoin, cdp, wadC, wadD, transferFrom); give(manager, cdp, owner); } } contract MCDCreateTaker { using SafeERC20 for ERC20; address payable public constant MCD_CREATE_FLASH_LOAN = 0x71eC9a4fCE561c3936a511D9ebb05B60CF2bA519; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; address public constant ETH_JOIN_ADDRESS = 0x2F0b23f53734252Bda2277357e97e1517d6B042A; ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); // solhint-disable-next-line const-name-snakecase Manager public constant manager = Manager(0x5ef30b9986345249bc32d8928B7ee64DE9435E39); // solhint-disable-next-line const-name-snakecase DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); struct CreateData { uint collAmount; uint daiAmount; address joinAddr; } function openWithLoan( SaverExchangeCore.ExchangeData memory _exchangeData, CreateData memory _createData ) public payable { MCD_CREATE_FLASH_LOAN.transfer(msg.value); //0x fee if (_createData.joinAddr != ETH_JOIN_ADDRESS) { ERC20(getCollateralAddr(_createData.joinAddr)).safeTransferFrom(msg.sender, address(this), _createData.collAmount); ERC20(getCollateralAddr(_createData.joinAddr)).safeTransfer(MCD_CREATE_FLASH_LOAN, _createData.collAmount); } (uint[6] memory numData, address[5] memory addrData, bytes memory callData) = _packData(_createData, _exchangeData); bytes memory paramsData = abi.encode(numData, addrData, callData, address(this)); lendingPool.flashLoan(MCD_CREATE_FLASH_LOAN, DAI_ADDRESS, _createData.daiAmount, paramsData); logger.Log(address(this), msg.sender, "MCDCreate", abi.encode(manager.last(address(this)), _createData.collAmount, _createData.daiAmount)); } function getCollateralAddr(address _joinAddr) internal view returns (address) { return address(Join(_joinAddr).gem()); } function _packData( CreateData memory _createData, SaverExchangeCore.ExchangeData memory exchangeData ) internal pure returns (uint[6] memory numData, address[5] memory addrData, bytes memory callData) { numData = [ _createData.collAmount, _createData.daiAmount, exchangeData.srcAmount, exchangeData.destAmount, exchangeData.minPrice, exchangeData.price0x ]; addrData = [ exchangeData.srcAddr, exchangeData.destAddr, exchangeData.exchangeAddr, exchangeData.wrapper, _createData.joinAddr ]; callData = exchangeData.callData; } } abstract contract GemLike { function approve(address, uint) virtual public; function transfer(address, uint) virtual public; function transferFrom(address, address, uint) virtual public; function deposit() virtual public payable; function withdraw(uint) virtual public; } abstract contract ManagerLike { function cdpCan(address, uint, address) virtual public view returns (uint); function ilks(uint) virtual public view returns (bytes32); function owns(uint) virtual public view returns (address); function urns(uint) virtual public view returns (address); function vat() virtual public view returns (address); function open(bytes32, address) virtual public returns (uint); function give(uint, address) virtual public; function cdpAllow(uint, address, uint) virtual public; function urnAllow(address, uint) virtual public; function frob(uint, int, int) virtual public; function flux(uint, address, uint) virtual public; function move(uint, address, uint) virtual public; function exit(address, uint, address, uint) virtual public; function quit(uint, address) virtual public; function enter(address, uint) virtual public; function shift(uint, uint) virtual public; } abstract contract VatLike { function can(address, address) virtual public view returns (uint); function ilks(bytes32) virtual public view returns (uint, uint, uint, uint, uint); function dai(address) virtual public view returns (uint); function urns(bytes32, address) virtual public view returns (uint, uint); function frob(bytes32, address, address, address, int, int) virtual public; function hope(address) virtual public; function move(address, address, uint) virtual public; } abstract contract GemJoinLike { function dec() virtual public returns (uint); function gem() virtual public returns (GemLike); function join(address, uint) virtual public payable; function exit(address, uint) virtual public; } abstract contract GNTJoinLike { function bags(address) virtual public view returns (address); function make(address) virtual public returns (address); } abstract contract DaiJoinLike { function vat() virtual public returns (VatLike); function dai() virtual public returns (GemLike); function join(address, uint) virtual public payable; function exit(address, uint) virtual public; } abstract contract HopeLike { function hope(address) virtual public; function nope(address) virtual public; } abstract contract ProxyRegistryInterface { function proxies(address _owner) virtual public view returns (address); function build(address) virtual public returns (address); } abstract contract EndLike { function fix(bytes32) virtual public view returns (uint); function cash(bytes32, uint) virtual public; function free(bytes32) virtual public; function pack(uint) virtual public; function skim(bytes32, address) virtual public; } abstract contract JugLike { function drip(bytes32) virtual public returns (uint); } abstract contract PotLike { function pie(address) virtual public view returns (uint); function drip() virtual public returns (uint); function join(uint) virtual public; function exit(uint) virtual public; } abstract contract ProxyRegistryLike { function proxies(address) virtual public view returns (address); function build(address) virtual public returns (address); } abstract contract ProxyLike { function owner() virtual public view returns (address); } abstract contract DSProxy { function execute(address _target, bytes memory _data) virtual public payable returns (bytes32); function setOwner(address owner_) virtual public; } contract Common { uint256 constant RAY = 10 ** 27; // Internal functions function mul(uint x, uint y) internal pure returns (uint z) { require(y == 0 || (z = x * y) / y == x, "mul-overflow"); } // Public functions function daiJoin_join(address apt, address urn, uint wad) public { // Gets DAI from the user's wallet DaiJoinLike(apt).dai().transferFrom(msg.sender, address(this), wad); // Approves adapter to take the DAI amount DaiJoinLike(apt).dai().approve(apt, wad); // Joins DAI into the vat DaiJoinLike(apt).join(urn, wad); } } contract SaverProxyActions is Common { event CDPAction(string indexed, uint indexed, uint, uint); // Internal functions function sub(uint x, uint y) internal pure returns (uint z) { require((z = x - y) <= x, "sub-overflow"); } function toInt(uint x) internal pure returns (int y) { y = int(x); require(y >= 0, "int-overflow"); } function toRad(uint wad) internal pure returns (uint rad) { rad = mul(wad, 10 ** 27); } function convertTo18(address gemJoin, uint256 amt) internal returns (uint256 wad) { // For those collaterals that have less than 18 decimals precision we need to do the conversion before passing to frob function // Adapters will automatically handle the difference of precision wad = mul( amt, 10 ** (18 - GemJoinLike(gemJoin).dec()) ); } function _getDrawDart( address vat, address jug, address urn, bytes32 ilk, uint wad ) internal returns (int dart) { // Updates stability fee rate uint rate = JugLike(jug).drip(ilk); // Gets DAI balance of the urn in the vat uint dai = VatLike(vat).dai(urn); // If there was already enough DAI in the vat balance, just exits it without adding more debt if (dai < mul(wad, RAY)) { // Calculates the needed dart so together with the existing dai in the vat is enough to exit wad amount of DAI tokens dart = toInt(sub(mul(wad, RAY), dai) / rate); // This is neeeded due lack of precision. It might need to sum an extra dart wei (for the given DAI wad amount) dart = mul(uint(dart), rate) < mul(wad, RAY) ? dart + 1 : dart; } } function _getWipeDart( address vat, uint dai, address urn, bytes32 ilk ) internal view returns (int dart) { // Gets actual rate from the vat (, uint rate,,,) = VatLike(vat).ilks(ilk); // Gets actual art value of the urn (, uint art) = VatLike(vat).urns(ilk, urn); // Uses the whole dai balance in the vat to reduce the debt dart = toInt(dai / rate); // Checks the calculated dart is not higher than urn.art (total debt), otherwise uses its value dart = uint(dart) <= art ? - dart : - toInt(art); } function _getWipeAllWad( address vat, address usr, address urn, bytes32 ilk ) internal view returns (uint wad) { // Gets actual rate from the vat (, uint rate,,,) = VatLike(vat).ilks(ilk); // Gets actual art value of the urn (, uint art) = VatLike(vat).urns(ilk, urn); // Gets actual dai amount in the urn uint dai = VatLike(vat).dai(usr); uint rad = sub(mul(art, rate), dai); wad = rad / RAY; // If the rad precision has some dust, it will need to request for 1 extra wad wei wad = mul(wad, RAY) < rad ? wad + 1 : wad; } // Public functions function transfer(address gem, address dst, uint wad) public { GemLike(gem).transfer(dst, wad); } function ethJoin_join(address apt, address urn) public payable { // Wraps ETH in WETH GemJoinLike(apt).gem().deposit{value: msg.value}(); // Approves adapter to take the WETH amount GemJoinLike(apt).gem().approve(address(apt), msg.value); // Joins WETH collateral into the vat GemJoinLike(apt).join(urn, msg.value); } function gemJoin_join(address apt, address urn, uint wad, bool transferFrom) public { // Only executes for tokens that have approval/transferFrom implementation if (transferFrom) { // Gets token from the user's wallet GemJoinLike(apt).gem().transferFrom(msg.sender, address(this), wad); // Approves adapter to take the token amount GemJoinLike(apt).gem().approve(apt, 0); GemJoinLike(apt).gem().approve(apt, wad); } // Joins token collateral into the vat GemJoinLike(apt).join(urn, wad); } function hope( address obj, address usr ) public { HopeLike(obj).hope(usr); } function nope( address obj, address usr ) public { HopeLike(obj).nope(usr); } function open( address manager, bytes32 ilk, address usr ) public returns (uint cdp) { cdp = ManagerLike(manager).open(ilk, usr); } function give( address manager, uint cdp, address usr ) public { ManagerLike(manager).give(cdp, usr); emit CDPAction('give', cdp, 0, 0); } function giveToProxy( address proxyRegistry, address manager, uint cdp, address dst ) public { // Gets actual proxy address address proxy = ProxyRegistryLike(proxyRegistry).proxies(dst); // Checks if the proxy address already existed and dst address is still the owner if (proxy == address(0) || ProxyLike(proxy).owner() != dst) { uint csize; assembly { csize := extcodesize(dst) } // We want to avoid creating a proxy for a contract address that might not be able to handle proxies, then losing the CDP require(csize == 0, "Dst-is-a-contract"); // Creates the proxy for the dst address proxy = ProxyRegistryLike(proxyRegistry).build(dst); } // Transfers CDP to the dst proxy give(manager, cdp, proxy); } function cdpAllow( address manager, uint cdp, address usr, uint ok ) public { ManagerLike(manager).cdpAllow(cdp, usr, ok); } function urnAllow( address manager, address usr, uint ok ) public { ManagerLike(manager).urnAllow(usr, ok); } function flux( address manager, uint cdp, address dst, uint wad ) public { ManagerLike(manager).flux(cdp, dst, wad); } function move( address manager, uint cdp, address dst, uint rad ) public { ManagerLike(manager).move(cdp, dst, rad); } function frob( address manager, uint cdp, int dink, int dart ) public { ManagerLike(manager).frob(cdp, dink, dart); } function quit( address manager, uint cdp, address dst ) public { ManagerLike(manager).quit(cdp, dst); } function enter( address manager, address src, uint cdp ) public { ManagerLike(manager).enter(src, cdp); } function shift( address manager, uint cdpSrc, uint cdpOrg ) public { ManagerLike(manager).shift(cdpSrc, cdpOrg); } function makeGemBag( address gemJoin ) public returns (address bag) { bag = GNTJoinLike(gemJoin).make(address(this)); } function lockETH( address manager, address ethJoin, uint cdp ) public payable { // Receives ETH amount, converts it to WETH and joins it into the vat ethJoin_join(ethJoin, address(this)); // Locks WETH amount into the CDP VatLike(ManagerLike(manager).vat()).frob( ManagerLike(manager).ilks(cdp), ManagerLike(manager).urns(cdp), address(this), address(this), toInt(msg.value), 0 ); emit CDPAction('lockETH', cdp, msg.value, 0); } function lockGem( address manager, address gemJoin, uint cdp, uint wad, bool transferFrom ) public { // Takes token amount from user's wallet and joins into the vat gemJoin_join(gemJoin, address(this), wad, transferFrom); // Locks token amount into the CDP VatLike(ManagerLike(manager).vat()).frob( ManagerLike(manager).ilks(cdp), ManagerLike(manager).urns(cdp), address(this), address(this), toInt(convertTo18(gemJoin, wad)), 0 ); emit CDPAction('lockGem', cdp, wad, 0); } function freeETH( address manager, address ethJoin, uint cdp, uint wad ) public { // Unlocks WETH amount from the CDP frob(manager, cdp, -toInt(wad), 0); // Moves the amount from the CDP urn to proxy's address flux(manager, cdp, address(this), wad); // Exits WETH amount to proxy address as a token GemJoinLike(ethJoin).exit(address(this), wad); // Converts WETH to ETH GemJoinLike(ethJoin).gem().withdraw(wad); // Sends ETH back to the user's wallet msg.sender.transfer(wad); emit CDPAction('freeETH', cdp, wad, 0); } function freeGem( address manager, address gemJoin, uint cdp, uint wad ) public { uint wad18 = convertTo18(gemJoin, wad); // Unlocks token amount from the CDP frob(manager, cdp, -toInt(wad18), 0); // Moves the amount from the CDP urn to proxy's address flux(manager, cdp, address(this), wad18); // Exits token amount to the user's wallet as a token GemJoinLike(gemJoin).exit(msg.sender, wad); emit CDPAction('freeGem', cdp, wad, 0); } function exitETH( address manager, address ethJoin, uint cdp, uint wad ) public { // Moves the amount from the CDP urn to proxy's address flux(manager, cdp, address(this), wad); // Exits WETH amount to proxy address as a token GemJoinLike(ethJoin).exit(address(this), wad); // Converts WETH to ETH GemJoinLike(ethJoin).gem().withdraw(wad); // Sends ETH back to the user's wallet msg.sender.transfer(wad); } function exitGem( address manager, address gemJoin, uint cdp, uint wad ) public { // Moves the amount from the CDP urn to proxy's address flux(manager, cdp, address(this), convertTo18(gemJoin, wad)); // Exits token amount to the user's wallet as a token GemJoinLike(gemJoin).exit(msg.sender, wad); } function draw( address manager, address jug, address daiJoin, uint cdp, uint wad ) public { address urn = ManagerLike(manager).urns(cdp); address vat = ManagerLike(manager).vat(); bytes32 ilk = ManagerLike(manager).ilks(cdp); // Generates debt in the CDP frob(manager, cdp, 0, _getDrawDart(vat, jug, urn, ilk, wad)); // Moves the DAI amount (balance in the vat in rad) to proxy's address move(manager, cdp, address(this), toRad(wad)); // Allows adapter to access to proxy's DAI balance in the vat if (VatLike(vat).can(address(this), address(daiJoin)) == 0) { VatLike(vat).hope(daiJoin); } // Exits DAI to the user's wallet as a token DaiJoinLike(daiJoin).exit(msg.sender, wad); emit CDPAction('draw', cdp, 0, wad); } function wipe( address manager, address daiJoin, uint cdp, uint wad ) public { address vat = ManagerLike(manager).vat(); address urn = ManagerLike(manager).urns(cdp); bytes32 ilk = ManagerLike(manager).ilks(cdp); address own = ManagerLike(manager).owns(cdp); if (own == address(this) || ManagerLike(manager).cdpCan(own, cdp, address(this)) == 1) { // Joins DAI amount into the vat daiJoin_join(daiJoin, urn, wad); // Paybacks debt to the CDP frob(manager, cdp, 0, _getWipeDart(vat, VatLike(vat).dai(urn), urn, ilk)); } else { // Joins DAI amount into the vat daiJoin_join(daiJoin, address(this), wad); // Paybacks debt to the CDP VatLike(vat).frob( ilk, urn, address(this), address(this), 0, _getWipeDart(vat, wad * RAY, urn, ilk) ); } emit CDPAction('wipe', cdp, 0, wad); } function wipeAll( address manager, address daiJoin, uint cdp ) public { address vat = ManagerLike(manager).vat(); address urn = ManagerLike(manager).urns(cdp); bytes32 ilk = ManagerLike(manager).ilks(cdp); (, uint art) = VatLike(vat).urns(ilk, urn); address own = ManagerLike(manager).owns(cdp); if (own == address(this) || ManagerLike(manager).cdpCan(own, cdp, address(this)) == 1) { // Joins DAI amount into the vat daiJoin_join(daiJoin, urn, _getWipeAllWad(vat, urn, urn, ilk)); // Paybacks debt to the CDP frob(manager, cdp, 0, -int(art)); } else { // Joins DAI amount into the vat daiJoin_join(daiJoin, address(this), _getWipeAllWad(vat, address(this), urn, ilk)); // Paybacks debt to the CDP VatLike(vat).frob( ilk, urn, address(this), address(this), 0, -int(art) ); } emit CDPAction('wipeAll', cdp, 0, art); } function lockETHAndDraw( address manager, address jug, address ethJoin, address daiJoin, uint cdp, uint wadD ) public payable { address urn = ManagerLike(manager).urns(cdp); address vat = ManagerLike(manager).vat(); bytes32 ilk = ManagerLike(manager).ilks(cdp); // Receives ETH amount, converts it to WETH and joins it into the vat ethJoin_join(ethJoin, urn); // Locks WETH amount into the CDP and generates debt frob(manager, cdp, toInt(msg.value), _getDrawDart(vat, jug, urn, ilk, wadD)); // Moves the DAI amount (balance in the vat in rad) to proxy's address move(manager, cdp, address(this), toRad(wadD)); // Allows adapter to access to proxy's DAI balance in the vat if (VatLike(vat).can(address(this), address(daiJoin)) == 0) { VatLike(vat).hope(daiJoin); } // Exits DAI to the user's wallet as a token DaiJoinLike(daiJoin).exit(msg.sender, wadD); } function openLockETHAndDraw( address manager, address jug, address ethJoin, address daiJoin, bytes32 ilk, uint wadD ) public payable returns (uint cdp) { cdp = open(manager, ilk, address(this)); lockETHAndDraw(manager, jug, ethJoin, daiJoin, cdp, wadD); emit CDPAction('openLockETHAndDraw', cdp, msg.value, wadD); } function lockGemAndDraw( address manager, address jug, address gemJoin, address daiJoin, uint cdp, uint wadC, uint wadD, bool transferFrom ) public { address urn = ManagerLike(manager).urns(cdp); address vat = ManagerLike(manager).vat(); bytes32 ilk = ManagerLike(manager).ilks(cdp); // Takes token amount from user's wallet and joins into the vat gemJoin_join(gemJoin, urn, wadC, transferFrom); // Locks token amount into the CDP and generates debt frob(manager, cdp, toInt(convertTo18(gemJoin, wadC)), _getDrawDart(vat, jug, urn, ilk, wadD)); // Moves the DAI amount (balance in the vat in rad) to proxy's address move(manager, cdp, address(this), toRad(wadD)); // Allows adapter to access to proxy's DAI balance in the vat if (VatLike(vat).can(address(this), address(daiJoin)) == 0) { VatLike(vat).hope(daiJoin); } // Exits DAI to the user's wallet as a token DaiJoinLike(daiJoin).exit(msg.sender, wadD); } function openLockGemAndDraw( address manager, address jug, address gemJoin, address daiJoin, bytes32 ilk, uint wadC, uint wadD, bool transferFrom ) public returns (uint cdp) { cdp = open(manager, ilk, address(this)); lockGemAndDraw(manager, jug, gemJoin, daiJoin, cdp, wadC, wadD, transferFrom); emit CDPAction('openLockGemAndDraw', cdp, wadC, wadD); } function wipeAllAndFreeETH( address manager, address ethJoin, address daiJoin, uint cdp, uint wadC ) public { address vat = ManagerLike(manager).vat(); address urn = ManagerLike(manager).urns(cdp); bytes32 ilk = ManagerLike(manager).ilks(cdp); (, uint art) = VatLike(vat).urns(ilk, urn); // Joins DAI amount into the vat daiJoin_join(daiJoin, urn, _getWipeAllWad(vat, urn, urn, ilk)); // Paybacks debt to the CDP and unlocks WETH amount from it frob( manager, cdp, -toInt(wadC), -int(art) ); // Moves the amount from the CDP urn to proxy's address flux(manager, cdp, address(this), wadC); // Exits WETH amount to proxy address as a token GemJoinLike(ethJoin).exit(address(this), wadC); // Converts WETH to ETH GemJoinLike(ethJoin).gem().withdraw(wadC); // Sends ETH back to the user's wallet msg.sender.transfer(wadC); emit CDPAction('wipeAllAndFreeETH', cdp, wadC, art); } function wipeAndFreeGem( address manager, address gemJoin, address daiJoin, uint cdp, uint wadC, uint wadD ) public { address urn = ManagerLike(manager).urns(cdp); // Joins DAI amount into the vat daiJoin_join(daiJoin, urn, wadD); uint wad18 = convertTo18(gemJoin, wadC); // Paybacks debt to the CDP and unlocks token amount from it frob( manager, cdp, -toInt(wad18), _getWipeDart(ManagerLike(manager).vat(), VatLike(ManagerLike(manager).vat()).dai(urn), urn, ManagerLike(manager).ilks(cdp)) ); // Moves the amount from the CDP urn to proxy's address flux(manager, cdp, address(this), wad18); // Exits token amount to the user's wallet as a token GemJoinLike(gemJoin).exit(msg.sender, wadC); } function wipeAllAndFreeGem( address manager, address gemJoin, address daiJoin, uint cdp, uint wadC ) public { address vat = ManagerLike(manager).vat(); address urn = ManagerLike(manager).urns(cdp); bytes32 ilk = ManagerLike(manager).ilks(cdp); (, uint art) = VatLike(vat).urns(ilk, urn); // Joins DAI amount into the vat daiJoin_join(daiJoin, urn, _getWipeAllWad(vat, urn, urn, ilk)); uint wad18 = convertTo18(gemJoin, wadC); // Paybacks debt to the CDP and unlocks token amount from it frob( manager, cdp, -toInt(wad18), -int(art) ); // Moves the amount from the CDP urn to proxy's address flux(manager, cdp, address(this), wad18); // Exits token amount to the user's wallet as a token GemJoinLike(gemJoin).exit(msg.sender, wadC); emit CDPAction('wipeAllAndFreeGem', cdp, wadC, art); } function createProxyAndCDP( address manager, address jug, address ethJoin, address daiJoin, bytes32 ilk, uint wadD, address registry ) public payable returns(uint) { address proxy = ProxyRegistryInterface(registry).build(msg.sender); uint cdp = openLockETHAndDraw(manager, jug, ethJoin, daiJoin, ilk, wadD ); give(manager, cdp, address(proxy)); return cdp; } function createProxyAndGemCDP( address manager, address jug, address gemJoin, address daiJoin, bytes32 ilk, uint wadC, uint wadD, bool transferFrom, address registry ) public returns(uint) { address proxy = ProxyRegistryInterface(registry).build(msg.sender); uint cdp = openLockGemAndDraw(manager, jug, gemJoin, daiJoin, ilk, wadC, wadD, transferFrom); give(manager, cdp, address(proxy)); return cdp; } } contract MCDSaverProxyHelper is DSMath { /// @notice Returns a normalized debt _amount based on the current rate /// @param _amount Amount of dai to be normalized /// @param _rate Current rate of the stability fee /// @param _daiVatBalance Balance od Dai in the Vat for that CDP function normalizeDrawAmount(uint _amount, uint _rate, uint _daiVatBalance) internal pure returns (int dart) { if (_daiVatBalance < mul(_amount, RAY)) { dart = toPositiveInt(sub(mul(_amount, RAY), _daiVatBalance) / _rate); dart = mul(uint(dart), _rate) < mul(_amount, RAY) ? dart + 1 : dart; } } /// @notice Converts a number to Rad percision /// @param _wad The input number in wad percision function toRad(uint _wad) internal pure returns (uint) { return mul(_wad, 10 ** 27); } /// @notice Converts a number to 18 decimal percision /// @param _joinAddr Join address of the collateral /// @param _amount Number to be converted function convertTo18(address _joinAddr, uint256 _amount) internal view returns (uint256) { return mul(_amount, 10 ** (18 - Join(_joinAddr).dec())); } /// @notice Converts a uint to int and checks if positive /// @param _x Number to be converted function toPositiveInt(uint _x) internal pure returns (int y) { y = int(_x); require(y >= 0, "int-overflow"); } /// @notice Gets Dai amount in Vat which can be added to Cdp /// @param _vat Address of Vat contract /// @param _urn Urn of the Cdp /// @param _ilk Ilk of the Cdp function normalizePaybackAmount(address _vat, address _urn, bytes32 _ilk) internal view returns (int amount) { uint dai = Vat(_vat).dai(_urn); (, uint rate,,,) = Vat(_vat).ilks(_ilk); (, uint art) = Vat(_vat).urns(_ilk, _urn); amount = toPositiveInt(dai / rate); amount = uint(amount) <= art ? - amount : - toPositiveInt(art); } /// @notice Gets the whole debt of the CDP /// @param _vat Address of Vat contract /// @param _usr Address of the Dai holder /// @param _urn Urn of the Cdp /// @param _ilk Ilk of the Cdp function getAllDebt(address _vat, address _usr, address _urn, bytes32 _ilk) internal view returns (uint daiAmount) { (, uint rate,,,) = Vat(_vat).ilks(_ilk); (, uint art) = Vat(_vat).urns(_ilk, _urn); uint dai = Vat(_vat).dai(_usr); uint rad = sub(mul(art, rate), dai); daiAmount = rad / RAY; daiAmount = mul(daiAmount, RAY) < rad ? daiAmount + 1 : daiAmount; } /// @notice Gets the token address from the Join contract /// @param _joinAddr Address of the Join contract function getCollateralAddr(address _joinAddr) internal view returns (address) { return address(Join(_joinAddr).gem()); } /// @notice Gets CDP info (collateral, debt) /// @param _manager Manager contract /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP function getCdpInfo(Manager _manager, uint _cdpId, bytes32 _ilk) public view returns (uint, uint) { address vat = _manager.vat(); address urn = _manager.urns(_cdpId); (uint collateral, uint debt) = Vat(vat).urns(_ilk, urn); (,uint rate,,,) = Vat(vat).ilks(_ilk); return (collateral, rmul(debt, rate)); } /// @notice Address that owns the DSProxy that owns the CDP /// @param _manager Manager contract /// @param _cdpId Id of the CDP function getOwner(Manager _manager, uint _cdpId) public view returns (address) { DSProxy proxy = DSProxy(uint160(_manager.owns(_cdpId))); return proxy.owner(); } } abstract contract ILendingPool { function flashLoan( address payable _receiver, address _reserve, uint _amount, bytes calldata _params) external virtual; } abstract contract ProtocolInterface { function deposit(address _user, uint256 _amount) public virtual; function withdraw(address _user, uint256 _amount) public virtual; } contract SavingsLogger { event Deposit(address indexed sender, uint8 protocol, uint256 amount); event Withdraw(address indexed sender, uint8 protocol, uint256 amount); event Swap(address indexed sender, uint8 fromProtocol, uint8 toProtocol, uint256 amount); function logDeposit(address _sender, uint8 _protocol, uint256 _amount) external { emit Deposit(_sender, _protocol, _amount); } function logWithdraw(address _sender, uint8 _protocol, uint256 _amount) external { emit Withdraw(_sender, _protocol, _amount); } function logSwap(address _sender, uint8 _protocolFrom, uint8 _protocolTo, uint256 _amount) external { emit Swap(_sender, _protocolFrom, _protocolTo, _amount); } } contract AaveSavingsProtocol is ProtocolInterface, DSAuth { address public constant ADAI_ADDRESS = 0xfC1E690f61EFd961294b3e1Ce3313fBD8aa4f85d; address public constant AAVE_LENDING_POOL = 0x398eC7346DcD622eDc5ae82352F02bE94C62d119; address public constant AAVE_LENDING_POOL_CORE = 0x3dfd23A6c5E8BbcFc9581d2E864a68feb6a076d3; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; function deposit(address _user, uint _amount) public override { require(msg.sender == _user); // get dai from user require(ERC20(DAI_ADDRESS).transferFrom(_user, address(this), _amount)); ERC20(DAI_ADDRESS).approve(AAVE_LENDING_POOL_CORE, uint(-1)); ILendingPool(AAVE_LENDING_POOL).deposit(DAI_ADDRESS, _amount, 0); ERC20(ADAI_ADDRESS).transfer(_user, ERC20(ADAI_ADDRESS).balanceOf(address(this))); } function withdraw(address _user, uint _amount) public override { require(msg.sender == _user); require(ERC20(ADAI_ADDRESS).transferFrom(_user, address(this), _amount)); IAToken(ADAI_ADDRESS).redeem(_amount); // return dai we have to user ERC20(DAI_ADDRESS).transfer(_user, _amount); } } contract CompoundSavingsProtocol { address public constant NEW_CDAI_ADDRESS = 0x5d3a536E4D6DbD6114cc1Ead35777bAB948E3643; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; CTokenInterface public constant cDaiContract = CTokenInterface(NEW_CDAI_ADDRESS); function compDeposit(address _user, uint _amount) internal { // get dai from user require(ERC20(DAI_ADDRESS).transferFrom(_user, address(this), _amount)); // mainnet only ERC20(DAI_ADDRESS).approve(NEW_CDAI_ADDRESS, uint(-1)); // mint cDai require(cDaiContract.mint(_amount) == 0, "Failed Mint"); } function compWithdraw(address _user, uint _amount) internal { // transfer all users balance to this contract require(cDaiContract.transferFrom(_user, address(this), ERC20(NEW_CDAI_ADDRESS).balanceOf(_user))); // approve cDai to compound contract cDaiContract.approve(NEW_CDAI_ADDRESS, uint(-1)); // get dai from cDai contract require(cDaiContract.redeemUnderlying(_amount) == 0, "Reedem Failed"); // return to user balance we didn't spend uint cDaiBalance = cDaiContract.balanceOf(address(this)); if (cDaiBalance > 0) { cDaiContract.transfer(_user, cDaiBalance); } // return dai we have to user ERC20(DAI_ADDRESS).transfer(_user, _amount); } } abstract contract VatLike { function can(address, address) virtual public view returns (uint); function ilks(bytes32) virtual public view returns (uint, uint, uint, uint, uint); function dai(address) virtual public view returns (uint); function urns(bytes32, address) virtual public view returns (uint, uint); function frob(bytes32, address, address, address, int, int) virtual public; function hope(address) virtual public; function move(address, address, uint) virtual public; } abstract contract PotLike { function pie(address) virtual public view returns (uint); function drip() virtual public returns (uint); function join(uint) virtual public; function exit(uint) virtual public; } abstract contract GemLike { function approve(address, uint) virtual public; function transfer(address, uint) virtual public; function transferFrom(address, address, uint) virtual public; function deposit() virtual public payable; function withdraw(uint) virtual public; } abstract contract DaiJoinLike { function vat() virtual public returns (VatLike); function dai() virtual public returns (GemLike); function join(address, uint) virtual public payable; function exit(address, uint) virtual public; } contract DSRSavingsProtocol is DSMath { // Mainnet address public constant POT_ADDRESS = 0x197E90f9FAD81970bA7976f33CbD77088E5D7cf7; address public constant DAI_JOIN_ADDRESS = 0x9759A6Ac90977b93B58547b4A71c78317f391A28; function dsrDeposit(uint _amount, bool _fromUser) internal { VatLike vat = DaiJoinLike(DAI_JOIN_ADDRESS).vat(); uint chi = PotLike(POT_ADDRESS).drip(); daiJoin_join(DAI_JOIN_ADDRESS, address(this), _amount, _fromUser); if (vat.can(address(this), address(POT_ADDRESS)) == 0) { vat.hope(POT_ADDRESS); } PotLike(POT_ADDRESS).join(mul(_amount, RAY) / chi); } function dsrWithdraw(uint _amount, bool _toUser) internal { VatLike vat = DaiJoinLike(DAI_JOIN_ADDRESS).vat(); uint chi = PotLike(POT_ADDRESS).drip(); uint pie = mul(_amount, RAY) / chi; PotLike(POT_ADDRESS).exit(pie); uint balance = DaiJoinLike(DAI_JOIN_ADDRESS).vat().dai(address(this)); if (vat.can(address(this), address(DAI_JOIN_ADDRESS)) == 0) { vat.hope(DAI_JOIN_ADDRESS); } address to; if (_toUser) { to = msg.sender; } else { to = address(this); } if (_amount == uint(-1)) { DaiJoinLike(DAI_JOIN_ADDRESS).exit(to, mul(chi, pie) / RAY); } else { DaiJoinLike(DAI_JOIN_ADDRESS).exit( to, balance >= mul(_amount, RAY) ? _amount : balance / RAY ); } } function daiJoin_join(address apt, address urn, uint wad, bool _fromUser) internal { if (_fromUser) { DaiJoinLike(apt).dai().transferFrom(msg.sender, address(this), wad); } DaiJoinLike(apt).dai().approve(apt, wad); DaiJoinLike(apt).join(urn, wad); } } contract DydxSavingsProtocol is ProtocolInterface, DSAuth { address public constant SOLO_MARGIN_ADDRESS = 0x1E0447b19BB6EcFdAe1e4AE1694b0C3659614e4e; ISoloMargin public soloMargin; address public savingsProxy; uint daiMarketId = 3; constructor() public { soloMargin = ISoloMargin(SOLO_MARGIN_ADDRESS); } function addSavingsProxy(address _savingsProxy) public auth { savingsProxy = _savingsProxy; } function deposit(address _user, uint _amount) public override { require(msg.sender == _user); Account.Info[] memory accounts = new Account.Info[](1); accounts[0] = getAccount(_user, 0); Actions.ActionArgs[] memory actions = new Actions.ActionArgs[](1); Types.AssetAmount memory amount = Types.AssetAmount({ sign: true, denomination: Types.AssetDenomination.Wei, ref: Types.AssetReference.Delta, value: _amount }); actions[0] = Actions.ActionArgs({ actionType: Actions.ActionType.Deposit, accountId: 0, amount: amount, primaryMarketId: daiMarketId, otherAddress: _user, secondaryMarketId: 0, //not used otherAccountId: 0, //not used data: "" //not used }); soloMargin.operate(accounts, actions); } function withdraw(address _user, uint _amount) public override { require(msg.sender == _user); Account.Info[] memory accounts = new Account.Info[](1); accounts[0] = getAccount(_user, 0); Actions.ActionArgs[] memory actions = new Actions.ActionArgs[](1); Types.AssetAmount memory amount = Types.AssetAmount({ sign: false, denomination: Types.AssetDenomination.Wei, ref: Types.AssetReference.Delta, value: _amount }); actions[0] = Actions.ActionArgs({ actionType: Actions.ActionType.Withdraw, accountId: 0, amount: amount, primaryMarketId: daiMarketId, otherAddress: _user, secondaryMarketId: 0, //not used otherAccountId: 0, //not used data: "" //not used }); soloMargin.operate(accounts, actions); } function getWeiBalance(address _user, uint _index) public view returns(Types.Wei memory) { Types.Wei[] memory weiBalances; (,,weiBalances) = soloMargin.getAccountBalances(getAccount(_user, _index)); return weiBalances[daiMarketId]; } function getParBalance(address _user, uint _index) public view returns(Types.Par memory) { Types.Par[] memory parBalances; (,parBalances,) = soloMargin.getAccountBalances(getAccount(_user, _index)); return parBalances[daiMarketId]; } function getAccount(address _user, uint _index) public pure returns(Account.Info memory) { Account.Info memory account = Account.Info({ owner: _user, number: _index }); return account; } } abstract contract ISoloMargin { struct OperatorArg { address operator; bool trusted; } function operate( Account.Info[] memory accounts, Actions.ActionArgs[] memory actions ) public virtual; function getAccountBalances( Account.Info memory account ) public view virtual returns ( address[] memory, Types.Par[] memory, Types.Wei[] memory ); function setOperators( OperatorArg[] memory args ) public virtual; function getNumMarkets() public view virtual returns (uint256); function getMarketTokenAddress(uint256 marketId) public view virtual returns (address); } library Account { // ============ Enums ============ /* * Most-recently-cached account status. * * Normal: Can only be liquidated if the account values are violating the global margin-ratio. * Liquid: Can be liquidated no matter the account values. * Can be vaporized if there are no more positive account values. * Vapor: Has only negative (or zeroed) account values. Can be vaporized. * */ enum Status { Normal, Liquid, Vapor } // ============ Structs ============ // Represents the unique key that specifies an account struct Info { address owner; // The address that owns the account uint256 number; // A nonce that allows a single address to control many accounts } // The complete storage for any account struct Storage { mapping (uint256 => Types.Par) balances; // Mapping from marketId to principal Status status; } // ============ Library Functions ============ function equals( Info memory a, Info memory b ) internal pure returns (bool) { return a.owner == b.owner && a.number == b.number; } } library Actions { // ============ Constants ============ bytes32 constant FILE = "Actions"; // ============ Enums ============ enum ActionType { Deposit, // supply tokens Withdraw, // borrow tokens Transfer, // transfer balance between accounts Buy, // buy an amount of some token (externally) Sell, // sell an amount of some token (externally) Trade, // trade tokens against another account Liquidate, // liquidate an undercollateralized or expiring account Vaporize, // use excess tokens to zero-out a completely negative account Call // send arbitrary data to an address } enum AccountLayout { OnePrimary, TwoPrimary, PrimaryAndSecondary } enum MarketLayout { ZeroMarkets, OneMarket, TwoMarkets } // ============ Structs ============ /* * Arguments that are passed to Solo in an ordered list as part of a single operation. * Each ActionArgs has an actionType which specifies which action struct that this data will be * parsed into before being processed. */ struct ActionArgs { ActionType actionType; uint256 accountId; Types.AssetAmount amount; uint256 primaryMarketId; uint256 secondaryMarketId; address otherAddress; uint256 otherAccountId; bytes data; } // ============ Action Types ============ /* * Moves tokens from an address to Solo. Can either repay a borrow or provide additional supply. */ struct DepositArgs { Types.AssetAmount amount; Account.Info account; uint256 market; address from; } /* * Moves tokens from Solo to another address. Can either borrow tokens or reduce the amount * previously supplied. */ struct WithdrawArgs { Types.AssetAmount amount; Account.Info account; uint256 market; address to; } /* * Transfers balance between two accounts. The msg.sender must be an operator for both accounts. * The amount field applies to accountOne. * This action does not require any token movement since the trade is done internally to Solo. */ struct TransferArgs { Types.AssetAmount amount; Account.Info accountOne; Account.Info accountTwo; uint256 market; } /* * Acquires a certain amount of tokens by spending other tokens. Sends takerMarket tokens to the * specified exchangeWrapper contract and expects makerMarket tokens in return. The amount field * applies to the makerMarket. */ struct BuyArgs { Types.AssetAmount amount; Account.Info account; uint256 makerMarket; uint256 takerMarket; address exchangeWrapper; bytes orderData; } /* * Spends a certain amount of tokens to acquire other tokens. Sends takerMarket tokens to the * specified exchangeWrapper and expects makerMarket tokens in return. The amount field applies * to the takerMarket. */ struct SellArgs { Types.AssetAmount amount; Account.Info account; uint256 takerMarket; uint256 makerMarket; address exchangeWrapper; bytes orderData; } /* * Trades balances between two accounts using any external contract that implements the * AutoTrader interface. The AutoTrader contract must be an operator for the makerAccount (for * which it is trading on-behalf-of). The amount field applies to the makerAccount and the * inputMarket. This proposed change to the makerAccount is passed to the AutoTrader which will * quote a change for the makerAccount in the outputMarket (or will disallow the trade). * This action does not require any token movement since the trade is done internally to Solo. */ struct TradeArgs { Types.AssetAmount amount; Account.Info takerAccount; Account.Info makerAccount; uint256 inputMarket; uint256 outputMarket; address autoTrader; bytes tradeData; } /* * Each account must maintain a certain margin-ratio (specified globally). If the account falls * below this margin-ratio, it can be liquidated by any other account. This allows anyone else * (arbitrageurs) to repay any borrowed asset (owedMarket) of the liquidating account in * exchange for any collateral asset (heldMarket) of the liquidAccount. The ratio is determined * by the price ratio (given by the oracles) plus a spread (specified globally). Liquidating an * account also sets a flag on the account that the account is being liquidated. This allows * anyone to continue liquidating the account until there are no more borrows being taken by the * liquidating account. Liquidators do not have to liquidate the entire account all at once but * can liquidate as much as they choose. The liquidating flag allows liquidators to continue * liquidating the account even if it becomes collateralized through partial liquidation or * price movement. */ struct LiquidateArgs { Types.AssetAmount amount; Account.Info solidAccount; Account.Info liquidAccount; uint256 owedMarket; uint256 heldMarket; } /* * Similar to liquidate, but vaporAccounts are accounts that have only negative balances * remaining. The arbitrageur pays back the negative asset (owedMarket) of the vaporAccount in * exchange for a collateral asset (heldMarket) at a favorable spread. However, since the * liquidAccount has no collateral assets, the collateral must come from Solo's excess tokens. */ struct VaporizeArgs { Types.AssetAmount amount; Account.Info solidAccount; Account.Info vaporAccount; uint256 owedMarket; uint256 heldMarket; } /* * Passes arbitrary bytes of data to an external contract that implements the Callee interface. * Does not change any asset amounts. This function may be useful for setting certain variables * on layer-two contracts for certain accounts without having to make a separate Ethereum * transaction for doing so. Also, the second-layer contracts can ensure that the call is coming * from an operator of the particular account. */ struct CallArgs { Account.Info account; address callee; bytes data; } // ============ Helper Functions ============ function getMarketLayout( ActionType actionType ) internal pure returns (MarketLayout) { if ( actionType == Actions.ActionType.Deposit || actionType == Actions.ActionType.Withdraw || actionType == Actions.ActionType.Transfer ) { return MarketLayout.OneMarket; } else if (actionType == Actions.ActionType.Call) { return MarketLayout.ZeroMarkets; } return MarketLayout.TwoMarkets; } function getAccountLayout( ActionType actionType ) internal pure returns (AccountLayout) { if ( actionType == Actions.ActionType.Transfer || actionType == Actions.ActionType.Trade ) { return AccountLayout.TwoPrimary; } else if ( actionType == Actions.ActionType.Liquidate || actionType == Actions.ActionType.Vaporize ) { return AccountLayout.PrimaryAndSecondary; } return AccountLayout.OnePrimary; } // ============ Parsing Functions ============ function parseDepositArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (DepositArgs memory) { assert(args.actionType == ActionType.Deposit); return DepositArgs({ amount: args.amount, account: accounts[args.accountId], market: args.primaryMarketId, from: args.otherAddress }); } function parseWithdrawArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (WithdrawArgs memory) { assert(args.actionType == ActionType.Withdraw); return WithdrawArgs({ amount: args.amount, account: accounts[args.accountId], market: args.primaryMarketId, to: args.otherAddress }); } function parseTransferArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (TransferArgs memory) { assert(args.actionType == ActionType.Transfer); return TransferArgs({ amount: args.amount, accountOne: accounts[args.accountId], accountTwo: accounts[args.otherAccountId], market: args.primaryMarketId }); } function parseBuyArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (BuyArgs memory) { assert(args.actionType == ActionType.Buy); return BuyArgs({ amount: args.amount, account: accounts[args.accountId], makerMarket: args.primaryMarketId, takerMarket: args.secondaryMarketId, exchangeWrapper: args.otherAddress, orderData: args.data }); } function parseSellArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (SellArgs memory) { assert(args.actionType == ActionType.Sell); return SellArgs({ amount: args.amount, account: accounts[args.accountId], takerMarket: args.primaryMarketId, makerMarket: args.secondaryMarketId, exchangeWrapper: args.otherAddress, orderData: args.data }); } function parseTradeArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (TradeArgs memory) { assert(args.actionType == ActionType.Trade); return TradeArgs({ amount: args.amount, takerAccount: accounts[args.accountId], makerAccount: accounts[args.otherAccountId], inputMarket: args.primaryMarketId, outputMarket: args.secondaryMarketId, autoTrader: args.otherAddress, tradeData: args.data }); } function parseLiquidateArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (LiquidateArgs memory) { assert(args.actionType == ActionType.Liquidate); return LiquidateArgs({ amount: args.amount, solidAccount: accounts[args.accountId], liquidAccount: accounts[args.otherAccountId], owedMarket: args.primaryMarketId, heldMarket: args.secondaryMarketId }); } function parseVaporizeArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (VaporizeArgs memory) { assert(args.actionType == ActionType.Vaporize); return VaporizeArgs({ amount: args.amount, solidAccount: accounts[args.accountId], vaporAccount: accounts[args.otherAccountId], owedMarket: args.primaryMarketId, heldMarket: args.secondaryMarketId }); } function parseCallArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (CallArgs memory) { assert(args.actionType == ActionType.Call); return CallArgs({ account: accounts[args.accountId], callee: args.otherAddress, data: args.data }); } } library Math { using SafeMath for uint256; // ============ Constants ============ bytes32 constant FILE = "Math"; // ============ Library Functions ============ /* * Return target * (numerator / denominator). */ function getPartial( uint256 target, uint256 numerator, uint256 denominator ) internal pure returns (uint256) { return target.mul(numerator).div(denominator); } /* * Return target * (numerator / denominator), but rounded up. */ function getPartialRoundUp( uint256 target, uint256 numerator, uint256 denominator ) internal pure returns (uint256) { if (target == 0 || numerator == 0) { // SafeMath will check for zero denominator return SafeMath.div(0, denominator); } return target.mul(numerator).sub(1).div(denominator).add(1); } function to128( uint256 number ) internal pure returns (uint128) { uint128 result = uint128(number); Require.that( result == number, FILE, "Unsafe cast to uint128" ); return result; } function to96( uint256 number ) internal pure returns (uint96) { uint96 result = uint96(number); Require.that( result == number, FILE, "Unsafe cast to uint96" ); return result; } function to32( uint256 number ) internal pure returns (uint32) { uint32 result = uint32(number); Require.that( result == number, FILE, "Unsafe cast to uint32" ); return result; } function min( uint256 a, uint256 b ) internal pure returns (uint256) { return a < b ? a : b; } function max( uint256 a, uint256 b ) internal pure returns (uint256) { return a > b ? a : b; } } library Require { // ============ Constants ============ uint256 constant ASCII_ZERO = 48; // '0' uint256 constant ASCII_RELATIVE_ZERO = 87; // 'a' - 10 uint256 constant ASCII_LOWER_EX = 120; // 'x' bytes2 constant COLON = 0x3a20; // ': ' bytes2 constant COMMA = 0x2c20; // ', ' bytes2 constant LPAREN = 0x203c; // ' <' byte constant RPAREN = 0x3e; // '>' uint256 constant FOUR_BIT_MASK = 0xf; // ============ Library Functions ============ function that( bool must, bytes32 file, bytes32 reason ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason) ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, uint256 payloadA ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), RPAREN ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, uint256 payloadA, uint256 payloadB ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), COMMA, stringify(payloadB), RPAREN ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, address payloadA ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), RPAREN ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, address payloadA, uint256 payloadB ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), COMMA, stringify(payloadB), RPAREN ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, address payloadA, uint256 payloadB, uint256 payloadC ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), COMMA, stringify(payloadB), COMMA, stringify(payloadC), RPAREN ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, bytes32 payloadA ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), RPAREN ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, bytes32 payloadA, uint256 payloadB, uint256 payloadC ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), COMMA, stringify(payloadB), COMMA, stringify(payloadC), RPAREN ) ) ); } } // ============ Private Functions ============ function stringifyTruncated( bytes32 input ) private pure returns (bytes memory) { // put the input bytes into the result bytes memory result = abi.encodePacked(input); // determine the length of the input by finding the location of the last non-zero byte for (uint256 i = 32; i > 0; ) { // reverse-for-loops with unsigned integer /* solium-disable-next-line security/no-modify-for-iter-var */ i--; // find the last non-zero byte in order to determine the length if (result[i] != 0) { uint256 length = i + 1; /* solium-disable-next-line security/no-inline-assembly */ assembly { mstore(result, length) // r.length = length; } return result; } } // all bytes are zero return new bytes(0); } function stringify( uint256 input ) private pure returns (bytes memory) { if (input == 0) { return "0"; } // get the final string length uint256 j = input; uint256 length; while (j != 0) { length++; j /= 10; } // allocate the string bytes memory bstr = new bytes(length); // populate the string starting with the least-significant character j = input; for (uint256 i = length; i > 0; ) { // reverse-for-loops with unsigned integer /* solium-disable-next-line security/no-modify-for-iter-var */ i--; // take last decimal digit bstr[i] = byte(uint8(ASCII_ZERO + (j % 10))); // remove the last decimal digit j /= 10; } return bstr; } function stringify( address input ) private pure returns (bytes memory) { uint256 z = uint256(input); // addresses are "0x" followed by 20 bytes of data which take up 2 characters each bytes memory result = new bytes(42); // populate the result with "0x" result[0] = byte(uint8(ASCII_ZERO)); result[1] = byte(uint8(ASCII_LOWER_EX)); // for each byte (starting from the lowest byte), populate the result with two characters for (uint256 i = 0; i < 20; i++) { // each byte takes two characters uint256 shift = i * 2; // populate the least-significant character result[41 - shift] = char(z & FOUR_BIT_MASK); z = z >> 4; // populate the most-significant character result[40 - shift] = char(z & FOUR_BIT_MASK); z = z >> 4; } return result; } function stringify( bytes32 input ) private pure returns (bytes memory) { uint256 z = uint256(input); // bytes32 are "0x" followed by 32 bytes of data which take up 2 characters each bytes memory result = new bytes(66); // populate the result with "0x" result[0] = byte(uint8(ASCII_ZERO)); result[1] = byte(uint8(ASCII_LOWER_EX)); // for each byte (starting from the lowest byte), populate the result with two characters for (uint256 i = 0; i < 32; i++) { // each byte takes two characters uint256 shift = i * 2; // populate the least-significant character result[65 - shift] = char(z & FOUR_BIT_MASK); z = z >> 4; // populate the most-significant character result[64 - shift] = char(z & FOUR_BIT_MASK); z = z >> 4; } return result; } function char( uint256 input ) private pure returns (byte) { // return ASCII digit (0-9) if (input < 10) { return byte(uint8(input + ASCII_ZERO)); } // return ASCII letter (a-f) return byte(uint8(input + ASCII_RELATIVE_ZERO)); } } library Types { using Math for uint256; // ============ AssetAmount ============ enum AssetDenomination { Wei, // the amount is denominated in wei Par // the amount is denominated in par } enum AssetReference { Delta, // the amount is given as a delta from the current value Target // the amount is given as an exact number to end up at } struct AssetAmount { bool sign; // true if positive AssetDenomination denomination; AssetReference ref; uint256 value; } // ============ Par (Principal Amount) ============ // Total borrow and supply values for a market struct TotalPar { uint128 borrow; uint128 supply; } // Individual principal amount for an account struct Par { bool sign; // true if positive uint128 value; } function zeroPar() internal pure returns (Par memory) { return Par({ sign: false, value: 0 }); } function sub( Par memory a, Par memory b ) internal pure returns (Par memory) { return add(a, negative(b)); } function add( Par memory a, Par memory b ) internal pure returns (Par memory) { Par memory result; if (a.sign == b.sign) { result.sign = a.sign; result.value = SafeMath.add(a.value, b.value).to128(); } else { if (a.value >= b.value) { result.sign = a.sign; result.value = SafeMath.sub(a.value, b.value).to128(); } else { result.sign = b.sign; result.value = SafeMath.sub(b.value, a.value).to128(); } } return result; } function equals( Par memory a, Par memory b ) internal pure returns (bool) { if (a.value == b.value) { if (a.value == 0) { return true; } return a.sign == b.sign; } return false; } function negative( Par memory a ) internal pure returns (Par memory) { return Par({ sign: !a.sign, value: a.value }); } function isNegative( Par memory a ) internal pure returns (bool) { return !a.sign && a.value > 0; } function isPositive( Par memory a ) internal pure returns (bool) { return a.sign && a.value > 0; } function isZero( Par memory a ) internal pure returns (bool) { return a.value == 0; } // ============ Wei (Token Amount) ============ // Individual token amount for an account struct Wei { bool sign; // true if positive uint256 value; } function zeroWei() internal pure returns (Wei memory) { return Wei({ sign: false, value: 0 }); } function sub( Wei memory a, Wei memory b ) internal pure returns (Wei memory) { return add(a, negative(b)); } function add( Wei memory a, Wei memory b ) internal pure returns (Wei memory) { Wei memory result; if (a.sign == b.sign) { result.sign = a.sign; result.value = SafeMath.add(a.value, b.value); } else { if (a.value >= b.value) { result.sign = a.sign; result.value = SafeMath.sub(a.value, b.value); } else { result.sign = b.sign; result.value = SafeMath.sub(b.value, a.value); } } return result; } function equals( Wei memory a, Wei memory b ) internal pure returns (bool) { if (a.value == b.value) { if (a.value == 0) { return true; } return a.sign == b.sign; } return false; } function negative( Wei memory a ) internal pure returns (Wei memory) { return Wei({ sign: !a.sign, value: a.value }); } function isNegative( Wei memory a ) internal pure returns (bool) { return !a.sign && a.value > 0; } function isPositive( Wei memory a ) internal pure returns (bool) { return a.sign && a.value > 0; } function isZero( Wei memory a ) internal pure returns (bool) { return a.value == 0; } } contract FulcrumSavingsProtocol is ProtocolInterface, DSAuth { address public constant NEW_IDAI_ADDRESS = 0x493C57C4763932315A328269E1ADaD09653B9081; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; address public savingsProxy; uint public decimals = 10 ** 18; function addSavingsProxy(address _savingsProxy) public auth { savingsProxy = _savingsProxy; } function deposit(address _user, uint _amount) public override { require(msg.sender == _user); // get dai from user require(ERC20(DAI_ADDRESS).transferFrom(_user, address(this), _amount)); // approve dai to Fulcrum ERC20(DAI_ADDRESS).approve(NEW_IDAI_ADDRESS, uint(-1)); // mint iDai ITokenInterface(NEW_IDAI_ADDRESS).mint(_user, _amount); } function withdraw(address _user, uint _amount) public override { require(msg.sender == _user); // transfer all users tokens to our contract require(ERC20(NEW_IDAI_ADDRESS).transferFrom(_user, address(this), ITokenInterface(NEW_IDAI_ADDRESS).balanceOf(_user))); // approve iDai to that contract ERC20(NEW_IDAI_ADDRESS).approve(NEW_IDAI_ADDRESS, uint(-1)); uint tokenPrice = ITokenInterface(NEW_IDAI_ADDRESS).tokenPrice(); // get dai from iDai contract ITokenInterface(NEW_IDAI_ADDRESS).burn(_user, _amount * decimals / tokenPrice); // return all remaining tokens back to user require(ERC20(NEW_IDAI_ADDRESS).transfer(_user, ITokenInterface(NEW_IDAI_ADDRESS).balanceOf(address(this)))); } } contract LoanShifterTaker is AdminAuth, ProxyPermission { ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; address public constant MANAGER_ADDRESS = 0x5ef30b9986345249bc32d8928B7ee64DE9435E39; Manager public constant manager = Manager(MANAGER_ADDRESS); ShifterRegistry public constant shifterRegistry = ShifterRegistry(0x597C52281b31B9d949a9D8fEbA08F7A2530a965e); enum Protocols { MCD, COMPOUND } enum SwapType { NO_SWAP, COLL_SWAP, DEBT_SWAP } struct LoanShiftData { Protocols fromProtocol; Protocols toProtocol; SwapType swapType; bool wholeDebt; uint collAmount; uint debtAmount; address debtAddr1; address debtAddr2; address addrLoan1; address addrLoan2; uint id1; uint id2; } /// @notice Main entry point, it will move or transform a loan /// @dev Called through DSProxy function moveLoan( SaverExchangeCore.ExchangeData memory _exchangeData, LoanShiftData memory _loanShift ) public payable { if (_isSameTypeVaults(_loanShift)) { _forkVault(_loanShift); return; } _callCloseAndOpen(_exchangeData, _loanShift); } //////////////////////// INTERNAL FUNCTIONS ////////////////////////// function _callCloseAndOpen( SaverExchangeCore.ExchangeData memory _exchangeData, LoanShiftData memory _loanShift ) internal { address protoAddr = shifterRegistry.getAddr(getNameByProtocol(uint8(_loanShift.fromProtocol))); uint loanAmount = _loanShift.debtAmount; if (_loanShift.wholeDebt) { loanAmount = ILoanShifter(protoAddr).getLoanAmount(_loanShift.id1, _loanShift.debtAddr1); } ( uint[8] memory numData, address[8] memory addrData, uint8[3] memory enumData, bytes memory callData ) = _packData(_loanShift, _exchangeData); // encode data bytes memory paramsData = abi.encode(numData, addrData, enumData, callData, address(this)); address payable loanShifterReceiverAddr = payable(shifterRegistry.getAddr("LOAN_SHIFTER_RECEIVER")); loanShifterReceiverAddr.transfer(address(this).balance); // call FL givePermission(loanShifterReceiverAddr); lendingPool.flashLoan(loanShifterReceiverAddr, getLoanAddr(_loanShift.debtAddr1, _loanShift.fromProtocol), loanAmount, paramsData); removePermission(loanShifterReceiverAddr); } function _forkVault(LoanShiftData memory _loanShift) internal { // Create new Vault to move to if (_loanShift.id2 == 0) { _loanShift.id2 = manager.open(manager.ilks(_loanShift.id1), address(this)); } if (_loanShift.wholeDebt) { manager.shift(_loanShift.id1, _loanShift.id2); } } function _isSameTypeVaults(LoanShiftData memory _loanShift) internal pure returns (bool) { return _loanShift.fromProtocol == Protocols.MCD && _loanShift.toProtocol == Protocols.MCD && _loanShift.addrLoan1 == _loanShift.addrLoan2; } function getNameByProtocol(uint8 _proto) internal pure returns (string memory) { if (_proto == 0) { return "MCD_SHIFTER"; } else if (_proto == 1) { return "COMP_SHIFTER"; } } function getLoanAddr(address _address, Protocols _fromProtocol) internal returns (address) { if (_fromProtocol == Protocols.COMPOUND) { return CTokenInterface(_address).underlying(); } else if (_fromProtocol == Protocols.MCD) { return DAI_ADDRESS; } else { return address(0); } } function _packData( LoanShiftData memory _loanShift, SaverExchangeCore.ExchangeData memory exchangeData ) internal pure returns (uint[8] memory numData, address[8] memory addrData, uint8[3] memory enumData, bytes memory callData) { numData = [ _loanShift.collAmount, _loanShift.debtAmount, _loanShift.id1, _loanShift.id2, exchangeData.srcAmount, exchangeData.destAmount, exchangeData.minPrice, exchangeData.price0x ]; addrData = [ _loanShift.addrLoan1, _loanShift.addrLoan2, _loanShift.debtAddr1, _loanShift.debtAddr2, exchangeData.srcAddr, exchangeData.destAddr, exchangeData.exchangeAddr, exchangeData.wrapper ]; enumData = [ uint8(_loanShift.fromProtocol), uint8(_loanShift.toProtocol), uint8(_loanShift.swapType) ]; callData = exchangeData.callData; } } contract ShifterRegistry is AdminAuth { mapping (string => address) public contractAddresses; bool public finalized; function changeContractAddr(string memory _contractName, address _protoAddr) public onlyOwner { require(!finalized); contractAddresses[_contractName] = _protoAddr; } function lock() public onlyOwner { finalized = true; } function getAddr(string memory _contractName) public view returns (address contractAddr) { contractAddr = contractAddresses[_contractName]; require(contractAddr != address(0), "No contract address registred"); } } library Address { function isContract(address account) internal view returns (bool) { // According to EIP-1052, 0x0 is the value returned for not-yet created accounts // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned // for accounts without code, i.e. `keccak256('')` bytes32 codehash; bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470; // solhint-disable-next-line no-inline-assembly assembly { codehash := extcodehash(account) } return (codehash != accountHash && codehash != 0x0); } function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return _functionCallWithValue(target, data, 0, errorMessage); } function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); return _functionCallWithValue(target, data, value, errorMessage); } function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) { require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: weiValue }(data); if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } contract BotRegistry is AdminAuth { mapping (address => bool) public botList; constructor() public { botList[0x776B4a13093e30B05781F97F6A4565B6aa8BE330] = true; botList[0xAED662abcC4FA3314985E67Ea993CAD064a7F5cF] = true; botList[0xa5d330F6619d6bF892A5B87D80272e1607b3e34D] = true; botList[0x5feB4DeE5150B589a7f567EA7CADa2759794A90A] = true; botList[0x7ca06417c1d6f480d3bB195B80692F95A6B66158] = true; } function setBot(address _botAddr, bool _state) public onlyOwner { botList[_botAddr] = _state; } } contract DFSProxy is Auth { string public constant NAME = "DFSProxy"; string public constant VERSION = "v0.1"; mapping(address => mapping(uint => bool)) public nonces; // --- EIP712 niceties --- bytes32 public DOMAIN_SEPARATOR; bytes32 public constant PERMIT_TYPEHASH = keccak256("callProxy(address _user,address _proxy,address _contract,bytes _txData,uint256 _nonce)"); constructor(uint256 chainId_) public { DOMAIN_SEPARATOR = keccak256(abi.encode( keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"), keccak256(bytes(NAME)), keccak256(bytes(VERSION)), chainId_, address(this) )); } function callProxy(address _user, address _proxy, address _contract, bytes calldata _txData, uint256 _nonce, uint8 _v, bytes32 _r, bytes32 _s) external payable onlyAuthorized { bytes32 digest = keccak256(abi.encodePacked( "\x19\x01", DOMAIN_SEPARATOR, keccak256(abi.encode(PERMIT_TYPEHASH, _user, _proxy, _contract, _txData, _nonce)) )); // user must be proxy owner require(DSProxyInterface(_proxy).owner() == _user); require(_user == ecrecover(digest, _v, _r, _s), "DFSProxy/user-not-valid"); require(!nonces[_user][_nonce], "DFSProxy/invalid-nonce"); nonces[_user][_nonce] = true; DSProxyInterface(_proxy).execute{value: msg.value}(_contract, _txData); } } contract DebugInfo { mapping (string => uint) public uintValues; mapping (string => address) public addrValues; mapping (string => string) public stringValues; mapping (string => bytes32) public bytes32Values; function logUint(string memory _id, uint _value) public { uintValues[_id] = _value; } function logAddr(string memory _id, address _value) public { addrValues[_id] = _value; } function logString(string memory _id, string memory _value) public { stringValues[_id] = _value; } function logBytes32(string memory _id, bytes32 _value) public { bytes32Values[_id] = _value; } } contract Discount { address public owner; mapping(address => CustomServiceFee) public serviceFees; uint256 constant MAX_SERVICE_FEE = 400; struct CustomServiceFee { bool active; uint256 amount; } constructor() public { owner = msg.sender; } function isCustomFeeSet(address _user) public view returns (bool) { return serviceFees[_user].active; } function getCustomServiceFee(address _user) public view returns (uint256) { return serviceFees[_user].amount; } function setServiceFee(address _user, uint256 _fee) public { require(msg.sender == owner, "Only owner"); require(_fee >= MAX_SERVICE_FEE || _fee == 0); serviceFees[_user] = CustomServiceFee({active: true, amount: _fee}); } function disableServiceFee(address _user) public { require(msg.sender == owner, "Only owner"); serviceFees[_user] = CustomServiceFee({active: false, amount: 0}); } } contract DydxFlashLoanBase { using SafeMath for uint256; address public constant SOLO_MARGIN_ADDRESS = 0x1E0447b19BB6EcFdAe1e4AE1694b0C3659614e4e; function _getMarketIdFromTokenAddress(address token) internal view returns (uint256) { return 0; } function _getRepaymentAmountInternal(uint256 amount) internal view returns (uint256) { // Needs to be overcollateralize // Needs to provide +2 wei to be safe return amount.add(2); } function _getAccountInfo() internal view returns (Account.Info memory) { return Account.Info({owner: address(this), number: 1}); } function _getWithdrawAction(uint marketId, uint256 amount, address contractAddr) internal view returns (Actions.ActionArgs memory) { return Actions.ActionArgs({ actionType: Actions.ActionType.Withdraw, accountId: 0, amount: Types.AssetAmount({ sign: false, denomination: Types.AssetDenomination.Wei, ref: Types.AssetReference.Delta, value: amount }), primaryMarketId: marketId, secondaryMarketId: 0, otherAddress: contractAddr, otherAccountId: 0, data: "" }); } function _getCallAction(bytes memory data, address contractAddr) internal view returns (Actions.ActionArgs memory) { return Actions.ActionArgs({ actionType: Actions.ActionType.Call, accountId: 0, amount: Types.AssetAmount({ sign: false, denomination: Types.AssetDenomination.Wei, ref: Types.AssetReference.Delta, value: 0 }), primaryMarketId: 0, secondaryMarketId: 0, otherAddress: contractAddr, otherAccountId: 0, data: data }); } function _getDepositAction(uint marketId, uint256 amount, address contractAddr) internal view returns (Actions.ActionArgs memory) { return Actions.ActionArgs({ actionType: Actions.ActionType.Deposit, accountId: 0, amount: Types.AssetAmount({ sign: true, denomination: Types.AssetDenomination.Wei, ref: Types.AssetReference.Delta, value: amount }), primaryMarketId: marketId, secondaryMarketId: 0, otherAddress: contractAddr, otherAccountId: 0, data: "" }); } } contract ExchangeDataParser { function decodeExchangeData( SaverExchangeCore.ExchangeData memory exchangeData ) internal pure returns (address[4] memory, uint[4] memory, bytes memory) { return ( [exchangeData.srcAddr, exchangeData.destAddr, exchangeData.exchangeAddr, exchangeData.wrapper], [exchangeData.srcAmount, exchangeData.destAmount, exchangeData.minPrice, exchangeData.price0x], exchangeData.callData ); } function encodeExchangeData( address[4] memory exAddr, uint[4] memory exNum, bytes memory callData ) internal pure returns (SaverExchangeCore.ExchangeData memory) { return SaverExchangeCore.ExchangeData({ srcAddr: exAddr[0], destAddr: exAddr[1], srcAmount: exNum[0], destAmount: exNum[1], minPrice: exNum[2], wrapper: exAddr[3], exchangeAddr: exAddr[2], callData: callData, price0x: exNum[3] }); } } interface IFlashLoanReceiver { function executeOperation(address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external; } abstract contract ILendingPoolAddressesProvider { function getLendingPool() public view virtual returns (address); function setLendingPoolImpl(address _pool) public virtual; function getLendingPoolCore() public virtual view returns (address payable); function setLendingPoolCoreImpl(address _lendingPoolCore) public virtual; function getLendingPoolConfigurator() public virtual view returns (address); function setLendingPoolConfiguratorImpl(address _configurator) public virtual; function getLendingPoolDataProvider() public virtual view returns (address); function setLendingPoolDataProviderImpl(address _provider) public virtual; function getLendingPoolParametersProvider() public virtual view returns (address); function setLendingPoolParametersProviderImpl(address _parametersProvider) public virtual; function getTokenDistributor() public virtual view returns (address); function setTokenDistributor(address _tokenDistributor) public virtual; function getFeeProvider() public virtual view returns (address); function setFeeProviderImpl(address _feeProvider) public virtual; function getLendingPoolLiquidationManager() public virtual view returns (address); function setLendingPoolLiquidationManager(address _manager) public virtual; function getLendingPoolManager() public virtual view returns (address); function setLendingPoolManager(address _lendingPoolManager) public virtual; function getPriceOracle() public virtual view returns (address); function setPriceOracle(address _priceOracle) public virtual; function getLendingRateOracle() public view virtual returns (address); function setLendingRateOracle(address _lendingRateOracle) public virtual; } library EthAddressLib { function ethAddress() internal pure returns(address) { return 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; } } abstract contract FlashLoanReceiverBase is IFlashLoanReceiver { using SafeERC20 for ERC20; using SafeMath for uint256; ILendingPoolAddressesProvider public addressesProvider; constructor(ILendingPoolAddressesProvider _provider) public { addressesProvider = _provider; } receive () external virtual payable {} function transferFundsBackToPoolInternal(address _reserve, uint256 _amount) internal { address payable core = addressesProvider.getLendingPoolCore(); transferInternal(core,_reserve, _amount); } function transferInternal(address payable _destination, address _reserve, uint256 _amount) internal { if(_reserve == EthAddressLib.ethAddress()) { //solium-disable-next-line _destination.call{value: _amount}(""); return; } ERC20(_reserve).safeTransfer(_destination, _amount); } function getBalanceInternal(address _target, address _reserve) internal view returns(uint256) { if(_reserve == EthAddressLib.ethAddress()) { return _target.balance; } return ERC20(_reserve).balanceOf(_target); } } contract GasBurner { // solhint-disable-next-line const-name-snakecase GasTokenInterface public constant gasToken = GasTokenInterface(0x0000000000b3F879cb30FE243b4Dfee438691c04); modifier burnGas(uint _amount) { if (gasToken.balanceOf(address(this)) >= _amount) { gasToken.free(_amount); } _; } } library SafeERC20 { using SafeMath for uint256; using Address for address; function safeTransfer(ERC20 token, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } function safeTransferFrom(ERC20 token, address from, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value)); } /** * @dev Deprecated. This function has issues similar to the ones found in * {IERC20-approve}, and its usage is discouraged. */ function safeApprove(ERC20 token, address spender, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value)); } function safeIncreaseAllowance(ERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).add(value); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } function safeDecreaseAllowance(ERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero"); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } function _callOptionalReturn(ERC20 token, bytes memory data) private { bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed"); if (returndata.length > 0) { // Return data is optional // solhint-disable-next-line max-line-length require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } } } library SafeMath { function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } contract ZrxAllowlist is AdminAuth { mapping (address => bool) public zrxAllowlist; mapping(address => bool) private nonPayableAddrs; constructor() public { zrxAllowlist[0x6958F5e95332D93D21af0D7B9Ca85B8212fEE0A5] = true; zrxAllowlist[0x61935CbDd02287B511119DDb11Aeb42F1593b7Ef] = true; zrxAllowlist[0xDef1C0ded9bec7F1a1670819833240f027b25EfF] = true; zrxAllowlist[0x080bf510FCbF18b91105470639e9561022937712] = true; nonPayableAddrs[0x080bf510FCbF18b91105470639e9561022937712] = true; } function setAllowlistAddr(address _zrxAddr, bool _state) public onlyOwner { zrxAllowlist[_zrxAddr] = _state; } function isZrxAddr(address _zrxAddr) public view returns (bool) { return zrxAllowlist[_zrxAddr]; } function addNonPayableAddr(address _nonPayableAddr) public onlyOwner { nonPayableAddrs[_nonPayableAddr] = true; } function removeNonPayableAddr(address _nonPayableAddr) public onlyOwner { nonPayableAddrs[_nonPayableAddr] = false; } function isNonPayableAddr(address _addr) public view returns(bool) { return nonPayableAddrs[_addr]; } } contract AaveBasicProxy is GasBurner { using SafeERC20 for ERC20; address public constant ETH_ADDR = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant AAVE_LENDING_POOL_ADDRESSES = 0x24a42fD28C976A61Df5D00D0599C34c4f90748c8; uint16 public constant AAVE_REFERRAL_CODE = 64; /// @notice User deposits tokens to the Aave protocol /// @dev User needs to approve the DSProxy to pull the _tokenAddr tokens /// @param _tokenAddr The address of the token to be deposited /// @param _amount Amount of tokens to be deposited function deposit(address _tokenAddr, uint256 _amount) public burnGas(5) payable { address lendingPoolCore = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); uint ethValue = _amount; if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(this), _amount); approveToken(_tokenAddr, lendingPoolCore); ethValue = 0; } ILendingPool(lendingPool).deposit{value: ethValue}(_tokenAddr, _amount, AAVE_REFERRAL_CODE); setUserUseReserveAsCollateralIfNeeded(_tokenAddr); } /// @notice User withdraws tokens from the Aave protocol /// @param _tokenAddr The address of the token to be withdrawn /// @param _aTokenAddr ATokens to be withdrawn /// @param _amount Amount of tokens to be withdrawn /// @param _wholeAmount If true we will take the whole amount on chain function withdraw(address _tokenAddr, address _aTokenAddr, uint256 _amount, bool _wholeAmount) public burnGas(8) { uint256 amount = _wholeAmount ? ERC20(_aTokenAddr).balanceOf(address(this)) : _amount; IAToken(_aTokenAddr).redeem(amount); withdrawTokens(_tokenAddr); } /// @notice User borrows tokens to the Aave protocol /// @param _tokenAddr The address of the token to be borrowed /// @param _amount Amount of tokens to be borrowed /// @param _type Send 1 for variable rate and 2 for fixed rate function borrow(address _tokenAddr, uint256 _amount, uint256 _type) public burnGas(8) { address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); ILendingPool(lendingPool).borrow(_tokenAddr, _amount, _type, AAVE_REFERRAL_CODE); withdrawTokens(_tokenAddr); } /// @dev User needs to approve the DSProxy to pull the _tokenAddr tokens /// @notice User paybacks tokens to the Aave protocol /// @param _tokenAddr The address of the token to be paybacked /// @param _aTokenAddr ATokens to be paybacked /// @param _amount Amount of tokens to be payed back /// @param _wholeDebt If true the _amount will be set to the whole amount of the debt function payback(address _tokenAddr, address _aTokenAddr, uint256 _amount, bool _wholeDebt) public burnGas(3) payable { address lendingPoolCore = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); uint256 amount = _amount; (,uint256 borrowAmount,,,,,uint256 originationFee,,,) = ILendingPool(lendingPool).getUserReserveData(_tokenAddr, address(this)); if (_wholeDebt) { amount = borrowAmount; } if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(this), amount + originationFee); approveToken(_tokenAddr, lendingPoolCore); } ILendingPool(lendingPool).repay{value: msg.value}(_tokenAddr, amount, payable(address(this))); withdrawTokens(_tokenAddr); } /// @dev User needs to approve the DSProxy to pull the _tokenAddr tokens /// @notice User paybacks tokens to the Aave protocol /// @param _tokenAddr The address of the token to be paybacked /// @param _aTokenAddr ATokens to be paybacked /// @param _amount Amount of tokens to be payed back /// @param _wholeDebt If true the _amount will be set to the whole amount of the debt function paybackOnBehalf(address _tokenAddr, address _aTokenAddr, uint256 _amount, bool _wholeDebt, address payable _onBehalf) public burnGas(3) payable { address lendingPoolCore = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); uint256 amount = _amount; (,uint256 borrowAmount,,,,,uint256 originationFee,,,) = ILendingPool(lendingPool).getUserReserveData(_tokenAddr, _onBehalf); if (_wholeDebt) { amount = borrowAmount; } if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(this), amount + originationFee); approveToken(_tokenAddr, lendingPoolCore); } ILendingPool(lendingPool).repay{value: msg.value}(_tokenAddr, amount, _onBehalf); withdrawTokens(_tokenAddr); } /// @notice Helper method to withdraw tokens from the DSProxy /// @param _tokenAddr Address of the token to be withdrawn function withdrawTokens(address _tokenAddr) public { uint256 amount = _tokenAddr == ETH_ADDR ? address(this).balance : ERC20(_tokenAddr).balanceOf(address(this)); if (amount > 0) { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransfer(msg.sender, amount); } else { msg.sender.transfer(amount); } } } /// @notice Approves token contract to pull underlying tokens from the DSProxy /// @param _tokenAddr Token we are trying to approve /// @param _caller Address which will gain the approval function approveToken(address _tokenAddr, address _caller) internal { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeApprove(_caller, 0); ERC20(_tokenAddr).safeApprove(_caller, uint256(-1)); } } function setUserUseReserveAsCollateralIfNeeded(address _tokenAddr) public { address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); (,,,,,,,,,bool collateralEnabled) = ILendingPool(lendingPool).getUserReserveData(_tokenAddr, address(this)); if (!collateralEnabled) { ILendingPool(lendingPool).setUserUseReserveAsCollateral(_tokenAddr, true); } } function setUserUseReserveAsCollateral(address _tokenAddr, bool _true) public { address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); ILendingPool(lendingPool).setUserUseReserveAsCollateral(_tokenAddr, _true); } function swapBorrowRateMode(address _reserve) public { address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); ILendingPool(lendingPool).swapBorrowRateMode(_reserve); } } contract AaveLoanInfo is AaveSafetyRatio { struct LoanData { address user; uint128 ratio; address[] collAddr; address[] borrowAddr; uint256[] collAmounts; uint256[] borrowAmounts; } struct TokenInfo { address aTokenAddress; address underlyingTokenAddress; uint256 collateralFactor; uint256 price; } struct TokenInfoFull { address aTokenAddress; address underlyingTokenAddress; uint256 supplyRate; uint256 borrowRate; uint256 totalSupply; uint256 availableLiquidity; uint256 totalBorrow; uint256 collateralFactor; uint256 price; bool usageAsCollateralEnabled; } /// @notice Calcualted the ratio of coll/debt for a compound user /// @param _user Address of the user function getRatio(address _user) public view returns (uint256) { // For each asset the account is in return getSafetyRatio(_user); } /// @notice Fetches Aave prices for tokens /// @param _tokens Arr. of tokens for which to get the prices /// @return prices Array of prices function getPrices(address[] memory _tokens) public view returns (uint256[] memory prices) { address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); prices = new uint[](_tokens.length); for (uint256 i = 0; i < _tokens.length; ++i) { prices[i] = IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_tokens[i]); } } /// @notice Fetches Aave collateral factors for tokens /// @param _tokens Arr. of tokens for which to get the coll. factors /// @return collFactors Array of coll. factors function getCollFactors(address[] memory _tokens) public view returns (uint256[] memory collFactors) { address lendingPoolCoreAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); collFactors = new uint256[](_tokens.length); for (uint256 i = 0; i < _tokens.length; ++i) { (,collFactors[i],,) = ILendingPool(lendingPoolCoreAddress).getReserveConfiguration(_tokens[i]); } } function getTokenBalances(address _user, address[] memory _tokens) public view returns (uint256[] memory balances, uint256[] memory borrows, bool[] memory enabledAsCollateral) { address lendingPoolAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); balances = new uint256[](_tokens.length); borrows = new uint256[](_tokens.length); enabledAsCollateral = new bool[](_tokens.length); for (uint256 i = 0; i < _tokens.length; i++) { address asset = _tokens[i]; (balances[i], borrows[i],,,,,,,,enabledAsCollateral[i]) = ILendingPool(lendingPoolAddress).getUserReserveData(asset, _user); } } /// @notice Calcualted the ratio of coll/debt for an aave user /// @param _users Addresses of the user /// @return ratios Array of ratios function getRatios(address[] memory _users) public view returns (uint256[] memory ratios) { ratios = new uint256[](_users.length); for (uint256 i = 0; i < _users.length; ++i) { ratios[i] = getSafetyRatio(_users[i]); } } /// @notice Information about reserves /// @param _tokenAddresses Array of tokens addresses /// @return tokens Array of reserves infomartion function getTokensInfo(address[] memory _tokenAddresses) public view returns(TokenInfo[] memory tokens) { address lendingPoolCoreAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); tokens = new TokenInfo[](_tokenAddresses.length); for (uint256 i = 0; i < _tokenAddresses.length; ++i) { (,uint256 ltv,,) = ILendingPool(lendingPoolCoreAddress).getReserveConfiguration(_tokenAddresses[i]); tokens[i] = TokenInfo({ aTokenAddress: ILendingPool(lendingPoolCoreAddress).getReserveATokenAddress(_tokenAddresses[i]), underlyingTokenAddress: _tokenAddresses[i], collateralFactor: ltv, price: IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_tokenAddresses[i]) }); } } /// @notice Information about reserves /// @param _tokenAddresses Array of token addresses /// @return tokens Array of reserves infomartion function getFullTokensInfo(address[] memory _tokenAddresses) public view returns(TokenInfoFull[] memory tokens) { address lendingPoolCoreAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); tokens = new TokenInfoFull[](_tokenAddresses.length); for (uint256 i = 0; i < _tokenAddresses.length; ++i) { (,uint256 ltv,,bool usageAsCollateralEnabled) = ILendingPool(lendingPoolCoreAddress).getReserveConfiguration(_tokenAddresses[i]); tokens[i] = TokenInfoFull({ aTokenAddress: ILendingPool(lendingPoolCoreAddress).getReserveATokenAddress(_tokenAddresses[i]), underlyingTokenAddress: _tokenAddresses[i], supplyRate: ILendingPool(lendingPoolCoreAddress).getReserveCurrentLiquidityRate(_tokenAddresses[i]), borrowRate: ILendingPool(lendingPoolCoreAddress).getReserveCurrentVariableBorrowRate(_tokenAddresses[i]), totalSupply: ILendingPool(lendingPoolCoreAddress).getReserveTotalLiquidity(_tokenAddresses[i]), availableLiquidity: ILendingPool(lendingPoolCoreAddress).getReserveAvailableLiquidity(_tokenAddresses[i]), totalBorrow: ILendingPool(lendingPoolCoreAddress).getReserveTotalBorrowsVariable(_tokenAddresses[i]), collateralFactor: ltv, price: IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_tokenAddresses[i]), usageAsCollateralEnabled: usageAsCollateralEnabled }); } } /// @notice Fetches all the collateral/debt address and amounts, denominated in ether /// @param _user Address of the user /// @return data LoanData information function getLoanData(address _user) public view returns (LoanData memory data) { address lendingPoolAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); address[] memory reserves = ILendingPool(lendingPoolAddress).getReserves(); data = LoanData({ user: _user, ratio: 0, collAddr: new address[](reserves.length), borrowAddr: new address[](reserves.length), collAmounts: new uint[](reserves.length), borrowAmounts: new uint[](reserves.length) }); uint64 collPos = 0; uint64 borrowPos = 0; for (uint64 i = 0; i < reserves.length; i++) { address reserve = reserves[i]; (uint256 aTokenBalance, uint256 borrowBalance,,,,,,,,) = ILendingPool(lendingPoolAddress).getUserReserveData(reserve, _user); uint256 price = IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(reserves[i]); if (aTokenBalance > 0) { uint256 userTokenBalanceEth = wmul(aTokenBalance, price) * (10 ** (18 - _getDecimals(reserve))); data.collAddr[collPos] = reserve; data.collAmounts[collPos] = userTokenBalanceEth; collPos++; } // Sum up debt in Eth if (borrowBalance > 0) { uint256 userBorrowBalanceEth = wmul(borrowBalance, price) * (10 ** (18 - _getDecimals(reserve))); data.borrowAddr[borrowPos] = reserve; data.borrowAmounts[borrowPos] = userBorrowBalanceEth; borrowPos++; } } data.ratio = uint128(getSafetyRatio(_user)); return data; } /// @notice Fetches all the collateral/debt address and amounts, denominated in ether /// @param _users Addresses of the user /// @return loans Array of LoanData information function getLoanDataArr(address[] memory _users) public view returns (LoanData[] memory loans) { loans = new LoanData[](_users.length); for (uint i = 0; i < _users.length; ++i) { loans[i] = getLoanData(_users[i]); } } } contract AaveMonitor is AdminAuth, DSMath, AaveSafetyRatio, GasBurner { using SafeERC20 for ERC20; enum Method { Boost, Repay } uint public REPAY_GAS_TOKEN = 19; uint public BOOST_GAS_TOKEN = 19; uint public MAX_GAS_PRICE = 200000000000; // 200 gwei uint public REPAY_GAS_COST = 2500000; uint public BOOST_GAS_COST = 2500000; address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; AaveMonitorProxy public aaveMonitorProxy; AaveSubscriptions public subscriptionsContract; address public aaveSaverProxy; DefisaverLogger public logger = DefisaverLogger(DEFISAVER_LOGGER); modifier onlyApproved() { require(BotRegistry(BOT_REGISTRY_ADDRESS).botList(msg.sender), "Not auth bot"); _; } /// @param _aaveMonitorProxy Proxy contracts that actually is authorized to call DSProxy /// @param _subscriptions Subscriptions contract for Aave positions /// @param _aaveSaverProxy Contract that actually performs Repay/Boost constructor(address _aaveMonitorProxy, address _subscriptions, address _aaveSaverProxy) public { aaveMonitorProxy = AaveMonitorProxy(_aaveMonitorProxy); subscriptionsContract = AaveSubscriptions(_subscriptions); aaveSaverProxy = _aaveSaverProxy; } /// @notice Bots call this method to repay for user when conditions are met /// @dev If the contract ownes gas token it will try and use it for gas price reduction /// @param _exData Exchange data /// @param _user The actual address that owns the Aave position function repayFor( SaverExchangeCore.ExchangeData memory _exData, address _user ) public payable onlyApproved burnGas(REPAY_GAS_TOKEN) { (bool isAllowed, uint ratioBefore) = canCall(Method.Repay, _user); require(isAllowed); // check if conditions are met uint256 gasCost = calcGasCost(REPAY_GAS_COST); aaveMonitorProxy.callExecute{value: msg.value}( _user, aaveSaverProxy, abi.encodeWithSignature( "repay((address,address,uint256,uint256,uint256,address,address,bytes,uint256),uint256)", _exData, gasCost ) ); (bool isGoodRatio, uint ratioAfter) = ratioGoodAfter(Method.Repay, _user); require(isGoodRatio); // check if the after result of the actions is good returnEth(); logger.Log(address(this), _user, "AutomaticAaveRepay", abi.encode(ratioBefore, ratioAfter)); } /// @notice Bots call this method to boost for user when conditions are met /// @dev If the contract ownes gas token it will try and use it for gas price reduction /// @param _exData Exchange data /// @param _user The actual address that owns the Aave position function boostFor( SaverExchangeCore.ExchangeData memory _exData, address _user ) public payable onlyApproved burnGas(BOOST_GAS_TOKEN) { (bool isAllowed, uint ratioBefore) = canCall(Method.Boost, _user); require(isAllowed); // check if conditions are met uint256 gasCost = calcGasCost(BOOST_GAS_COST); aaveMonitorProxy.callExecute{value: msg.value}( _user, aaveSaverProxy, abi.encodeWithSignature( "boost((address,address,uint256,uint256,uint256,address,address,bytes,uint256),uint256)", _exData, gasCost ) ); (bool isGoodRatio, uint ratioAfter) = ratioGoodAfter(Method.Boost, _user); require(isGoodRatio); // check if the after result of the actions is good returnEth(); logger.Log(address(this), _user, "AutomaticAaveBoost", abi.encode(ratioBefore, ratioAfter)); } /******************* INTERNAL METHODS ********************************/ function returnEth() internal { // return if some eth left if (address(this).balance > 0) { msg.sender.transfer(address(this).balance); } } /******************* STATIC METHODS ********************************/ /// @notice Checks if Boost/Repay could be triggered for the CDP /// @dev Called by AaveMonitor to enforce the min/max check /// @param _method Type of action to be called /// @param _user The actual address that owns the Aave position /// @return Boolean if it can be called and the ratio function canCall(Method _method, address _user) public view returns(bool, uint) { bool subscribed = subscriptionsContract.isSubscribed(_user); AaveSubscriptions.AaveHolder memory holder = subscriptionsContract.getHolder(_user); // check if cdp is subscribed if (!subscribed) return (false, 0); // check if boost and boost allowed if (_method == Method.Boost && !holder.boostEnabled) return (false, 0); uint currRatio = getSafetyRatio(_user); if (_method == Method.Repay) { return (currRatio < holder.minRatio, currRatio); } else if (_method == Method.Boost) { return (currRatio > holder.maxRatio, currRatio); } } /// @dev After the Boost/Repay check if the ratio doesn't trigger another call /// @param _method Type of action to be called /// @param _user The actual address that owns the Aave position /// @return Boolean if the recent action preformed correctly and the ratio function ratioGoodAfter(Method _method, address _user) public view returns(bool, uint) { AaveSubscriptions.AaveHolder memory holder; holder= subscriptionsContract.getHolder(_user); uint currRatio = getSafetyRatio(_user); if (_method == Method.Repay) { return (currRatio < holder.maxRatio, currRatio); } else if (_method == Method.Boost) { return (currRatio > holder.minRatio, currRatio); } } /// @notice Calculates gas cost (in Eth) of tx /// @dev Gas price is limited to MAX_GAS_PRICE to prevent attack of draining user CDP /// @param _gasAmount Amount of gas used for the tx function calcGasCost(uint _gasAmount) public view returns (uint) { uint gasPrice = tx.gasprice <= MAX_GAS_PRICE ? tx.gasprice : MAX_GAS_PRICE; return mul(gasPrice, _gasAmount); } /******************* OWNER ONLY OPERATIONS ********************************/ /// @notice Allows owner to change gas cost for boost operation, but only up to 3 millions /// @param _gasCost New gas cost for boost method function changeBoostGasCost(uint _gasCost) public onlyOwner { require(_gasCost < 3000000); BOOST_GAS_COST = _gasCost; } /// @notice Allows owner to change gas cost for repay operation, but only up to 3 millions /// @param _gasCost New gas cost for repay method function changeRepayGasCost(uint _gasCost) public onlyOwner { require(_gasCost < 3000000); REPAY_GAS_COST = _gasCost; } /// @notice Allows owner to change max gas price /// @param _maxGasPrice New max gas price function changeMaxGasPrice(uint _maxGasPrice) public onlyOwner { require(_maxGasPrice < 500000000000); MAX_GAS_PRICE = _maxGasPrice; } /// @notice Allows owner to change gas token amount /// @param _gasTokenAmount New gas token amount /// @param _repay true if repay gas token, false if boost gas token function changeGasTokenAmount(uint _gasTokenAmount, bool _repay) public onlyOwner { if (_repay) { REPAY_GAS_TOKEN = _gasTokenAmount; } else { BOOST_GAS_TOKEN = _gasTokenAmount; } } } contract AaveMonitorProxy is AdminAuth { using SafeERC20 for ERC20; uint public CHANGE_PERIOD; address public monitor; address public newMonitor; address public lastMonitor; uint public changeRequestedTimestamp; mapping(address => bool) public allowed; event MonitorChangeInitiated(address oldMonitor, address newMonitor); event MonitorChangeCanceled(); event MonitorChangeFinished(address monitor); event MonitorChangeReverted(address monitor); // if someone who is allowed become malicious, owner can't be changed modifier onlyAllowed() { require(allowed[msg.sender] || msg.sender == owner); _; } modifier onlyMonitor() { require (msg.sender == monitor); _; } constructor(uint _changePeriod) public { CHANGE_PERIOD = _changePeriod * 1 days; } /// @notice Only monitor contract is able to call execute on users proxy /// @param _owner Address of cdp owner (users DSProxy address) /// @param _aaveSaverProxy Address of AaveSaverProxy /// @param _data Data to send to AaveSaverProxy function callExecute(address _owner, address _aaveSaverProxy, bytes memory _data) public payable onlyMonitor { // execute reverts if calling specific method fails DSProxyInterface(_owner).execute{value: msg.value}(_aaveSaverProxy, _data); // return if anything left if (address(this).balance > 0) { msg.sender.transfer(address(this).balance); } } /// @notice Allowed users are able to set Monitor contract without any waiting period first time /// @param _monitor Address of Monitor contract function setMonitor(address _monitor) public onlyAllowed { require(monitor == address(0)); monitor = _monitor; } /// @notice Allowed users are able to start procedure for changing monitor /// @dev after CHANGE_PERIOD needs to call confirmNewMonitor to actually make a change /// @param _newMonitor address of new monitor function changeMonitor(address _newMonitor) public onlyAllowed { require(changeRequestedTimestamp == 0); changeRequestedTimestamp = now; lastMonitor = monitor; newMonitor = _newMonitor; emit MonitorChangeInitiated(lastMonitor, newMonitor); } /// @notice At any point allowed users are able to cancel monitor change function cancelMonitorChange() public onlyAllowed { require(changeRequestedTimestamp > 0); changeRequestedTimestamp = 0; newMonitor = address(0); emit MonitorChangeCanceled(); } /// @notice Anyone is able to confirm new monitor after CHANGE_PERIOD if process is started function confirmNewMonitor() public onlyAllowed { require((changeRequestedTimestamp + CHANGE_PERIOD) < now); require(changeRequestedTimestamp != 0); require(newMonitor != address(0)); monitor = newMonitor; newMonitor = address(0); changeRequestedTimestamp = 0; emit MonitorChangeFinished(monitor); } /// @notice Its possible to revert monitor to last used monitor function revertMonitor() public onlyAllowed { require(lastMonitor != address(0)); monitor = lastMonitor; emit MonitorChangeReverted(monitor); } /// @notice Allowed users are able to add new allowed user /// @param _user Address of user that will be allowed function addAllowed(address _user) public onlyAllowed { allowed[_user] = true; } /// @notice Allowed users are able to remove allowed user /// @dev owner is always allowed even if someone tries to remove it from allowed mapping /// @param _user Address of allowed user function removeAllowed(address _user) public onlyAllowed { allowed[_user] = false; } function setChangePeriod(uint _periodInDays) public onlyAllowed { require(_periodInDays * 1 days > CHANGE_PERIOD); CHANGE_PERIOD = _periodInDays * 1 days; } /// @notice In case something is left in contract, owner is able to withdraw it /// @param _token address of token to withdraw balance function withdrawToken(address _token) public onlyOwner { uint balance = ERC20(_token).balanceOf(address(this)); ERC20(_token).safeTransfer(msg.sender, balance); } /// @notice In case something is left in contract, owner is able to withdraw it function withdrawEth() public onlyOwner { uint balance = address(this).balance; msg.sender.transfer(balance); } } contract AaveSubscriptions is AdminAuth { struct AaveHolder { address user; uint128 minRatio; uint128 maxRatio; uint128 optimalRatioBoost; uint128 optimalRatioRepay; bool boostEnabled; } struct SubPosition { uint arrPos; bool subscribed; } AaveHolder[] public subscribers; mapping (address => SubPosition) public subscribersPos; uint public changeIndex; event Subscribed(address indexed user); event Unsubscribed(address indexed user); event Updated(address indexed user); event ParamUpdates(address indexed user, uint128, uint128, uint128, uint128, bool); /// @dev Called by the DSProxy contract which owns the Aave position /// @notice Adds the users Aave poistion in the list of subscriptions so it can be monitored /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalBoost Ratio amount which boost should target /// @param _optimalRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled function subscribe(uint128 _minRatio, uint128 _maxRatio, uint128 _optimalBoost, uint128 _optimalRepay, bool _boostEnabled) external { // if boost is not enabled, set max ratio to max uint uint128 localMaxRatio = _boostEnabled ? _maxRatio : uint128(-1); require(checkParams(_minRatio, localMaxRatio), "Must be correct params"); SubPosition storage subInfo = subscribersPos[msg.sender]; AaveHolder memory subscription = AaveHolder({ minRatio: _minRatio, maxRatio: localMaxRatio, optimalRatioBoost: _optimalBoost, optimalRatioRepay: _optimalRepay, user: msg.sender, boostEnabled: _boostEnabled }); changeIndex++; if (subInfo.subscribed) { subscribers[subInfo.arrPos] = subscription; emit Updated(msg.sender); emit ParamUpdates(msg.sender, _minRatio, localMaxRatio, _optimalBoost, _optimalRepay, _boostEnabled); } else { subscribers.push(subscription); subInfo.arrPos = subscribers.length - 1; subInfo.subscribed = true; emit Subscribed(msg.sender); } } /// @notice Called by the users DSProxy /// @dev Owner who subscribed cancels his subscription function unsubscribe() external { _unsubscribe(msg.sender); } /// @dev Checks limit if minRatio is bigger than max /// @param _minRatio Minimum ratio, bellow which repay can be triggered /// @param _maxRatio Maximum ratio, over which boost can be triggered /// @return Returns bool if the params are correct function checkParams(uint128 _minRatio, uint128 _maxRatio) internal pure returns (bool) { if (_minRatio > _maxRatio) { return false; } return true; } /// @dev Internal method to remove a subscriber from the list /// @param _user The actual address that owns the Aave position function _unsubscribe(address _user) internal { require(subscribers.length > 0, "Must have subscribers in the list"); SubPosition storage subInfo = subscribersPos[_user]; require(subInfo.subscribed, "Must first be subscribed"); address lastOwner = subscribers[subscribers.length - 1].user; SubPosition storage subInfo2 = subscribersPos[lastOwner]; subInfo2.arrPos = subInfo.arrPos; subscribers[subInfo.arrPos] = subscribers[subscribers.length - 1]; subscribers.pop(); // remove last element and reduce arr length changeIndex++; subInfo.subscribed = false; subInfo.arrPos = 0; emit Unsubscribed(msg.sender); } /// @dev Checks if the user is subscribed /// @param _user The actual address that owns the Aave position /// @return If the user is subscribed function isSubscribed(address _user) public view returns (bool) { SubPosition storage subInfo = subscribersPos[_user]; return subInfo.subscribed; } /// @dev Returns subscribtion information about a user /// @param _user The actual address that owns the Aave position /// @return Subscription information about the user if exists function getHolder(address _user) public view returns (AaveHolder memory) { SubPosition storage subInfo = subscribersPos[_user]; return subscribers[subInfo.arrPos]; } /// @notice Helper method to return all the subscribed CDPs /// @return List of all subscribers function getSubscribers() public view returns (AaveHolder[] memory) { return subscribers; } /// @notice Helper method for the frontend, returns all the subscribed CDPs paginated /// @param _page What page of subscribers you want /// @param _perPage Number of entries per page /// @return List of all subscribers for that page function getSubscribersByPage(uint _page, uint _perPage) public view returns (AaveHolder[] memory) { AaveHolder[] memory holders = new AaveHolder[](_perPage); uint start = _page * _perPage; uint end = start + _perPage; end = (end > holders.length) ? holders.length : end; uint count = 0; for (uint i = start; i < end; i++) { holders[count] = subscribers[i]; count++; } return holders; } ////////////// ADMIN METHODS /////////////////// /// @notice Admin function to unsubscribe a position /// @param _user The actual address that owns the Aave position function unsubscribeByAdmin(address _user) public onlyOwner { SubPosition storage subInfo = subscribersPos[_user]; if (subInfo.subscribed) { _unsubscribe(_user); } } } contract AaveSubscriptionsProxy is ProxyPermission { address public constant AAVE_SUBSCRIPTION_ADDRESS = 0xe08ff7A2BADb634F0b581E675E6B3e583De086FC; address public constant AAVE_MONITOR_PROXY = 0xfA560Dba3a8D0B197cA9505A2B98120DD89209AC; /// @notice Calls subscription contract and creates a DSGuard if non existent /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalRatioBoost Ratio amount which boost should target /// @param _optimalRatioRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled function subscribe( uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled ) public { givePermission(AAVE_MONITOR_PROXY); IAaveSubscription(AAVE_SUBSCRIPTION_ADDRESS).subscribe( _minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled); } /// @notice Calls subscription contract and updated existing parameters /// @dev If subscription is non existent this will create one /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalRatioBoost Ratio amount which boost should target /// @param _optimalRatioRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled function update( uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled ) public { IAaveSubscription(AAVE_SUBSCRIPTION_ADDRESS).subscribe(_minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled); } /// @notice Calls the subscription contract to unsubscribe the caller function unsubscribe() public { removePermission(AAVE_MONITOR_PROXY); IAaveSubscription(AAVE_SUBSCRIPTION_ADDRESS).unsubscribe(); } } contract AaveImport is AaveHelper, AdminAuth { using SafeERC20 for ERC20; address public constant WETH_ADDRESS = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address public constant BASIC_PROXY = 0xd6d0E28DCAB2D0ffA55Ed6A2A685f2262B7e736E; address public constant AETH_ADDRESS = 0x3a3A65aAb0dd2A17E3F1947bA16138cd37d08c04; function callFunction( address sender, Account.Info memory account, bytes memory data ) public { ( address collateralToken, address borrowToken, uint256 ethAmount, address user, address proxy ) = abi.decode(data, (address,address,uint256,address,address)); // withdraw eth TokenInterface(WETH_ADDRESS).withdraw(ethAmount); address lendingPoolCoreAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); address aCollateralToken = ILendingPool(lendingPoolCoreAddress).getReserveATokenAddress(collateralToken); address aBorrowToken = ILendingPool(lendingPoolCoreAddress).getReserveATokenAddress(borrowToken); // deposit eth on behalf of proxy DSProxy(payable(proxy)).execute{value: ethAmount}(BASIC_PROXY, abi.encodeWithSignature("deposit(address,uint256)", ETH_ADDR, ethAmount)); // borrow needed amount to repay users borrow (,uint256 borrowAmount,,uint256 borrowRateMode,,,uint256 originationFee,,,) = ILendingPool(lendingPool).getUserReserveData(borrowToken, user); borrowAmount += originationFee; DSProxy(payable(proxy)).execute(BASIC_PROXY, abi.encodeWithSignature("borrow(address,uint256,uint256)", borrowToken, borrowAmount, borrowRateMode)); // payback on behalf of user ERC20(borrowToken).safeApprove(proxy, borrowAmount); DSProxy(payable(proxy)).execute(BASIC_PROXY, abi.encodeWithSignature("paybackOnBehalf(address,address,uint256,bool,address)", borrowToken, aBorrowToken, 0, true, user)); // pull tokens from user to proxy ERC20(aCollateralToken).safeTransferFrom(user, proxy, ERC20(aCollateralToken).balanceOf(user)); // enable as collateral DSProxy(payable(proxy)).execute(BASIC_PROXY, abi.encodeWithSignature("setUserUseReserveAsCollateralIfNeeded(address)", collateralToken)); // withdraw deposited eth DSProxy(payable(proxy)).execute(BASIC_PROXY, abi.encodeWithSignature("withdraw(address,address,uint256,bool)", ETH_ADDR, AETH_ADDRESS, ethAmount, false)); // deposit eth, get weth and return to sender TokenInterface(WETH_ADDRESS).deposit.value(address(this).balance)(); ERC20(WETH_ADDRESS).safeTransfer(proxy, ethAmount+2); } /// @dev if contract receive eth, convert it to WETH receive() external payable { // deposit eth and get weth if (msg.sender == owner) { TokenInterface(WETH_ADDRESS).deposit.value(address(this).balance)(); } } } contract AaveImportTaker is DydxFlashLoanBase, ProxyPermission { address public constant WETH_ADDR = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address payable public constant AAVE_IMPORT = 0xCE4c11c339be0CddAf07eacF18d7e6884800F43E; address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; address public constant PROXY_REGISTRY_ADDRESS = 0x4678f0a6958e4D2Bc4F1BAF7Bc52E8F3564f3fE4; /// @notice Starts the process to move users position 1 collateral and 1 borrow /// @dev User must send 2 wei with this transaction /// @dev User must approve AaveImport to pull _aCollateralToken /// @param _collateralToken Collateral token we are moving to DSProxy /// @param _borrowToken Borrow token we are moving to DSProxy /// @param _ethAmount ETH amount that needs to be pulled from dydx function importLoan(address _collateralToken, address _borrowToken, uint _ethAmount) public { ISoloMargin solo = ISoloMargin(SOLO_MARGIN_ADDRESS); // Get marketId from token address uint256 marketId = _getMarketIdFromTokenAddress(WETH_ADDR); // Calculate repay amount (_amount + (2 wei)) // Approve transfer from uint256 repayAmount = _getRepaymentAmountInternal(_ethAmount); ERC20(WETH_ADDR).approve(SOLO_MARGIN_ADDRESS, repayAmount); Actions.ActionArgs[] memory operations = new Actions.ActionArgs[](3); operations[0] = _getWithdrawAction(marketId, _ethAmount, AAVE_IMPORT); operations[1] = _getCallAction( abi.encode(_collateralToken, _borrowToken, _ethAmount, msg.sender, address(this)), AAVE_IMPORT ); operations[2] = _getDepositAction(marketId, repayAmount, address(this)); Account.Info[] memory accountInfos = new Account.Info[](1); accountInfos[0] = _getAccountInfo(); givePermission(AAVE_IMPORT); solo.operate(accountInfos, operations); removePermission(AAVE_IMPORT); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "AaveImport", abi.encode(_collateralToken, _borrowToken)); } } contract CompoundBasicProxy is GasBurner { address public constant ETH_ADDR = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant COMPTROLLER_ADDR = 0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B; using SafeERC20 for ERC20; /// @notice User deposits tokens to the Compound protocol /// @dev User needs to approve the DSProxy to pull the _tokenAddr tokens /// @param _tokenAddr The address of the token to be deposited /// @param _cTokenAddr CTokens to be deposited /// @param _amount Amount of tokens to be deposited /// @param _inMarket True if the token is already in market for that address function deposit(address _tokenAddr, address _cTokenAddr, uint _amount, bool _inMarket) public burnGas(5) payable { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(this), _amount); } approveToken(_tokenAddr, _cTokenAddr); if (!_inMarket) { enterMarket(_cTokenAddr); } if (_tokenAddr != ETH_ADDR) { require(CTokenInterface(_cTokenAddr).mint(_amount) == 0); } else { CEtherInterface(_cTokenAddr).mint{value: msg.value}(); // reverts on fail } } /// @notice User withdraws tokens to the Compound protocol /// @param _tokenAddr The address of the token to be withdrawn /// @param _cTokenAddr CTokens to be withdrawn /// @param _amount Amount of tokens to be withdrawn /// @param _isCAmount If true _amount is cTokens if falls _amount is underlying tokens function withdraw(address _tokenAddr, address _cTokenAddr, uint _amount, bool _isCAmount) public burnGas(5) { if (_isCAmount) { require(CTokenInterface(_cTokenAddr).redeem(_amount) == 0); } else { require(CTokenInterface(_cTokenAddr).redeemUnderlying(_amount) == 0); } // withdraw funds to msg.sender if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransfer(msg.sender, ERC20(_tokenAddr).balanceOf(address(this))); } else { msg.sender.transfer(address(this).balance); } } /// @notice User borrows tokens to the Compound protocol /// @param _tokenAddr The address of the token to be borrowed /// @param _cTokenAddr CTokens to be borrowed /// @param _amount Amount of tokens to be borrowed /// @param _inMarket True if the token is already in market for that address function borrow(address _tokenAddr, address _cTokenAddr, uint _amount, bool _inMarket) public burnGas(8) { if (!_inMarket) { enterMarket(_cTokenAddr); } require(CTokenInterface(_cTokenAddr).borrow(_amount) == 0); // withdraw funds to msg.sender if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransfer(msg.sender, ERC20(_tokenAddr).balanceOf(address(this))); } else { msg.sender.transfer(address(this).balance); } } /// @dev User needs to approve the DSProxy to pull the _tokenAddr tokens /// @notice User paybacks tokens to the Compound protocol /// @param _tokenAddr The address of the token to be paybacked /// @param _cTokenAddr CTokens to be paybacked /// @param _amount Amount of tokens to be payedback /// @param _wholeDebt If true the _amount will be set to the whole amount of the debt function payback(address _tokenAddr, address _cTokenAddr, uint _amount, bool _wholeDebt) public burnGas(5) payable { approveToken(_tokenAddr, _cTokenAddr); if (_wholeDebt) { _amount = CTokenInterface(_cTokenAddr).borrowBalanceCurrent(address(this)); } if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(this), _amount); require(CTokenInterface(_cTokenAddr).repayBorrow(_amount) == 0); } else { CEtherInterface(_cTokenAddr).repayBorrow{value: msg.value}(); msg.sender.transfer(address(this).balance); // send back the extra eth } } /// @notice Helper method to withdraw tokens from the DSProxy /// @param _tokenAddr Address of the token to be withdrawn function withdrawTokens(address _tokenAddr) public { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransfer(msg.sender, ERC20(_tokenAddr).balanceOf(address(this))); } else { msg.sender.transfer(address(this).balance); } } /// @notice Enters the Compound market so it can be deposited/borrowed /// @param _cTokenAddr CToken address of the token function enterMarket(address _cTokenAddr) public { address[] memory markets = new address[](1); markets[0] = _cTokenAddr; ComptrollerInterface(COMPTROLLER_ADDR).enterMarkets(markets); } /// @notice Exits the Compound market so it can't be deposited/borrowed /// @param _cTokenAddr CToken address of the token function exitMarket(address _cTokenAddr) public { ComptrollerInterface(COMPTROLLER_ADDR).exitMarket(_cTokenAddr); } /// @notice Approves CToken contract to pull underlying tokens from the DSProxy /// @param _tokenAddr Token we are trying to approve /// @param _cTokenAddr Address which will gain the approval function approveToken(address _tokenAddr, address _cTokenAddr) internal { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeApprove(_cTokenAddr, 0); ERC20(_tokenAddr).safeApprove(_cTokenAddr, uint(-1)); } } } contract CompoundSafetyRatio is Exponential, DSMath { // solhint-disable-next-line const-name-snakecase ComptrollerInterface public constant comp = ComptrollerInterface(0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B); /// @notice Calcualted the ratio of debt / adjusted collateral /// @param _user Address of the user function getSafetyRatio(address _user) public view returns (uint) { // For each asset the account is in address[] memory assets = comp.getAssetsIn(_user); address oracleAddr = comp.oracle(); uint sumCollateral = 0; uint sumBorrow = 0; for (uint i = 0; i < assets.length; i++) { address asset = assets[i]; (, uint cTokenBalance, uint borrowBalance, uint exchangeRateMantissa) = CTokenInterface(asset).getAccountSnapshot(_user); Exp memory oraclePrice; if (cTokenBalance != 0 || borrowBalance != 0) { oraclePrice = Exp({mantissa: CompoundOracleInterface(oracleAddr).getUnderlyingPrice(asset)}); } // Sum up collateral in Usd if (cTokenBalance != 0) { (, uint collFactorMantissa) = comp.markets(address(asset)); Exp memory collateralFactor = Exp({mantissa: collFactorMantissa}); Exp memory exchangeRate = Exp({mantissa: exchangeRateMantissa}); (, Exp memory tokensToUsd) = mulExp3(collateralFactor, exchangeRate, oraclePrice); (, sumCollateral) = mulScalarTruncateAddUInt(tokensToUsd, cTokenBalance, sumCollateral); } // Sum up debt in Usd if (borrowBalance != 0) { (, sumBorrow) = mulScalarTruncateAddUInt(oraclePrice, borrowBalance, sumBorrow); } } if (sumBorrow == 0) return uint(-1); uint borrowPowerUsed = (sumBorrow * 10**18) / sumCollateral; return wdiv(1e18, borrowPowerUsed); } } contract CompoundMonitor is AdminAuth, DSMath, CompoundSafetyRatio, GasBurner { using SafeERC20 for ERC20; enum Method { Boost, Repay } uint public REPAY_GAS_TOKEN = 20; uint public BOOST_GAS_TOKEN = 20; uint constant public MAX_GAS_PRICE = 500000000000; // 500 gwei uint public REPAY_GAS_COST = 2000000; uint public BOOST_GAS_COST = 2000000; address public constant GAS_TOKEN_INTERFACE_ADDRESS = 0x0000000000b3F879cb30FE243b4Dfee438691c04; address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; address public constant BOT_REGISTRY_ADDRESS = 0x637726f8b08a7ABE3aE3aCaB01A80E2d8ddeF77B; CompoundMonitorProxy public compoundMonitorProxy; CompoundSubscriptions public subscriptionsContract; address public compoundFlashLoanTakerAddress; DefisaverLogger public logger = DefisaverLogger(DEFISAVER_LOGGER); modifier onlyApproved() { require(BotRegistry(BOT_REGISTRY_ADDRESS).botList(msg.sender), "Not auth bot"); _; } /// @param _compoundMonitorProxy Proxy contracts that actually is authorized to call DSProxy /// @param _subscriptions Subscriptions contract for Compound positions /// @param _compoundFlashLoanTaker Contract that actually performs Repay/Boost constructor(address _compoundMonitorProxy, address _subscriptions, address _compoundFlashLoanTaker) public { compoundMonitorProxy = CompoundMonitorProxy(_compoundMonitorProxy); subscriptionsContract = CompoundSubscriptions(_subscriptions); compoundFlashLoanTakerAddress = _compoundFlashLoanTaker; } /// @notice Bots call this method to repay for user when conditions are met /// @dev If the contract ownes gas token it will try and use it for gas price reduction /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress, exchangeAddress] /// @param _user The actual address that owns the Compound position function repayFor( SaverExchangeCore.ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress address _user ) public payable onlyApproved burnGas(REPAY_GAS_TOKEN) { (bool isAllowed, uint ratioBefore) = canCall(Method.Repay, _user); require(isAllowed); // check if conditions are met uint256 gasCost = calcGasCost(REPAY_GAS_COST); compoundMonitorProxy.callExecute{value: msg.value}( _user, compoundFlashLoanTakerAddress, abi.encodeWithSignature( "repayWithLoan((address,address,uint256,uint256,uint256,address,address,bytes,uint256),address[2],uint256)", _exData, _cAddresses, gasCost ) ); (bool isGoodRatio, uint ratioAfter) = ratioGoodAfter(Method.Repay, _user); require(isGoodRatio); // check if the after result of the actions is good returnEth(); logger.Log(address(this), _user, "AutomaticCompoundRepay", abi.encode(ratioBefore, ratioAfter)); } /// @notice Bots call this method to boost for user when conditions are met /// @dev If the contract ownes gas token it will try and use it for gas price reduction /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress, exchangeAddress] /// @param _user The actual address that owns the Compound position function boostFor( SaverExchangeCore.ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress address _user ) public payable onlyApproved burnGas(BOOST_GAS_TOKEN) { (bool isAllowed, uint ratioBefore) = canCall(Method.Boost, _user); require(isAllowed); // check if conditions are met uint256 gasCost = calcGasCost(BOOST_GAS_COST); compoundMonitorProxy.callExecute{value: msg.value}( _user, compoundFlashLoanTakerAddress, abi.encodeWithSignature( "boostWithLoan((address,address,uint256,uint256,uint256,address,address,bytes,uint256),address[2],uint256)", _exData, _cAddresses, gasCost ) ); (bool isGoodRatio, uint ratioAfter) = ratioGoodAfter(Method.Boost, _user); require(isGoodRatio); // check if the after result of the actions is good returnEth(); logger.Log(address(this), _user, "AutomaticCompoundBoost", abi.encode(ratioBefore, ratioAfter)); } /******************* INTERNAL METHODS ********************************/ function returnEth() internal { // return if some eth left if (address(this).balance > 0) { msg.sender.transfer(address(this).balance); } } /******************* STATIC METHODS ********************************/ /// @notice Checks if Boost/Repay could be triggered for the CDP /// @dev Called by MCDMonitor to enforce the min/max check /// @param _method Type of action to be called /// @param _user The actual address that owns the Compound position /// @return Boolean if it can be called and the ratio function canCall(Method _method, address _user) public view returns(bool, uint) { bool subscribed = subscriptionsContract.isSubscribed(_user); CompoundSubscriptions.CompoundHolder memory holder = subscriptionsContract.getHolder(_user); // check if cdp is subscribed if (!subscribed) return (false, 0); // check if boost and boost allowed if (_method == Method.Boost && !holder.boostEnabled) return (false, 0); uint currRatio = getSafetyRatio(_user); if (_method == Method.Repay) { return (currRatio < holder.minRatio, currRatio); } else if (_method == Method.Boost) { return (currRatio > holder.maxRatio, currRatio); } } /// @dev After the Boost/Repay check if the ratio doesn't trigger another call /// @param _method Type of action to be called /// @param _user The actual address that owns the Compound position /// @return Boolean if the recent action preformed correctly and the ratio function ratioGoodAfter(Method _method, address _user) public view returns(bool, uint) { CompoundSubscriptions.CompoundHolder memory holder; holder= subscriptionsContract.getHolder(_user); uint currRatio = getSafetyRatio(_user); if (_method == Method.Repay) { return (currRatio < holder.maxRatio, currRatio); } else if (_method == Method.Boost) { return (currRatio > holder.minRatio, currRatio); } } /// @notice Calculates gas cost (in Eth) of tx /// @dev Gas price is limited to MAX_GAS_PRICE to prevent attack of draining user CDP /// @param _gasAmount Amount of gas used for the tx function calcGasCost(uint _gasAmount) public view returns (uint) { uint gasPrice = tx.gasprice <= MAX_GAS_PRICE ? tx.gasprice : MAX_GAS_PRICE; return mul(gasPrice, _gasAmount); } /******************* OWNER ONLY OPERATIONS ********************************/ /// @notice Allows owner to change gas cost for boost operation, but only up to 3 millions /// @param _gasCost New gas cost for boost method function changeBoostGasCost(uint _gasCost) public onlyOwner { require(_gasCost < 3000000); BOOST_GAS_COST = _gasCost; } /// @notice Allows owner to change gas cost for repay operation, but only up to 3 millions /// @param _gasCost New gas cost for repay method function changeRepayGasCost(uint _gasCost) public onlyOwner { require(_gasCost < 3000000); REPAY_GAS_COST = _gasCost; } /// @notice If any tokens gets stuck in the contract owner can withdraw it /// @param _tokenAddress Address of the ERC20 token /// @param _to Address of the receiver /// @param _amount The amount to be sent function transferERC20(address _tokenAddress, address _to, uint _amount) public onlyOwner { ERC20(_tokenAddress).safeTransfer(_to, _amount); } /// @notice If any Eth gets stuck in the contract owner can withdraw it /// @param _to Address of the receiver /// @param _amount The amount to be sent function transferEth(address payable _to, uint _amount) public onlyOwner { _to.transfer(_amount); } } contract CompoundSaverHelper is DSMath, Exponential { using SafeERC20 for ERC20; address payable public constant WALLET_ADDR = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; address public constant DISCOUNT_ADDR = 0x1b14E8D511c9A4395425314f849bD737BAF8208F; uint public constant MANUAL_SERVICE_FEE = 400; // 0.25% Fee uint public constant AUTOMATIC_SERVICE_FEE = 333; // 0.3% Fee address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant CETH_ADDRESS = 0x4Ddc2D193948926D02f9B1fE9e1daa0718270ED5; address public constant COMPTROLLER = 0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B; address public constant COMPOUND_LOGGER = 0x3DD0CDf5fFA28C6847B4B276e2fD256046a44bb7; address public constant BOT_REGISTRY_ADDRESS = 0x637726f8b08a7ABE3aE3aCaB01A80E2d8ddeF77B; /// @notice Helper method to payback the Compound debt /// @dev If amount is bigger it will repay the whole debt and send the extra to the _user /// @param _amount Amount of tokens we want to repay /// @param _cBorrowToken Ctoken address we are repaying /// @param _borrowToken Token address we are repaying /// @param _user Owner of the compound position we are paying back function paybackDebt(uint _amount, address _cBorrowToken, address _borrowToken, address payable _user) internal { uint wholeDebt = CTokenInterface(_cBorrowToken).borrowBalanceCurrent(address(this)); if (_amount > wholeDebt) { if (_borrowToken == ETH_ADDRESS) { _user.transfer((_amount - wholeDebt)); } else { ERC20(_borrowToken).safeTransfer(_user, (_amount - wholeDebt)); } _amount = wholeDebt; } approveCToken(_borrowToken, _cBorrowToken); if (_borrowToken == ETH_ADDRESS) { CEtherInterface(_cBorrowToken).repayBorrow{value: _amount}(); } else { require(CTokenInterface(_cBorrowToken).repayBorrow(_amount) == 0); } } /// @notice Calculates the fee amount /// @param _amount Amount that is converted /// @param _user Actuall user addr not DSProxy /// @param _gasCost Ether amount of gas we are spending for tx /// @param _cTokenAddr CToken addr. of token we are getting for the fee /// @return feeAmount The amount we took for the fee function getFee(uint _amount, address _user, uint _gasCost, address _cTokenAddr) internal returns (uint feeAmount) { uint fee = MANUAL_SERVICE_FEE; if (BotRegistry(BOT_REGISTRY_ADDRESS).botList(tx.origin)) { fee = AUTOMATIC_SERVICE_FEE; } address tokenAddr = getUnderlyingAddr(_cTokenAddr); if (Discount(DISCOUNT_ADDR).isCustomFeeSet(_user)) { fee = Discount(DISCOUNT_ADDR).getCustomServiceFee(_user); } feeAmount = (fee == 0) ? 0 : (_amount / fee); if (_gasCost != 0) { address oracle = ComptrollerInterface(COMPTROLLER).oracle(); uint usdTokenPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(_cTokenAddr); uint ethPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(CETH_ADDRESS); uint tokenPriceInEth = wdiv(usdTokenPrice, ethPrice); _gasCost = wdiv(_gasCost, tokenPriceInEth); feeAmount = add(feeAmount, _gasCost); } // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } if (tokenAddr == ETH_ADDRESS) { WALLET_ADDR.transfer(feeAmount); } else { ERC20(tokenAddr).safeTransfer(WALLET_ADDR, feeAmount); } } /// @notice Calculates the gas cost of transaction and send it to wallet /// @param _amount Amount that is converted /// @param _gasCost Ether amount of gas we are spending for tx /// @param _cTokenAddr CToken addr. of token we are getting for the fee /// @return feeAmount The amount we took for the fee function getGasCost(uint _amount, uint _gasCost, address _cTokenAddr) internal returns (uint feeAmount) { address tokenAddr = getUnderlyingAddr(_cTokenAddr); if (_gasCost != 0) { address oracle = ComptrollerInterface(COMPTROLLER).oracle(); uint usdTokenPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(_cTokenAddr); uint ethPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(CETH_ADDRESS); uint tokenPriceInEth = wdiv(usdTokenPrice, ethPrice); feeAmount = wdiv(_gasCost, tokenPriceInEth); } // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } if (tokenAddr == ETH_ADDRESS) { WALLET_ADDR.transfer(feeAmount); } else { ERC20(tokenAddr).safeTransfer(WALLET_ADDR, feeAmount); } } /// @notice Enters the market for the collatera and borrow tokens /// @param _cTokenAddrColl Collateral address we are entering the market in /// @param _cTokenAddrBorrow Borrow address we are entering the market in function enterMarket(address _cTokenAddrColl, address _cTokenAddrBorrow) internal { address[] memory markets = new address[](2); markets[0] = _cTokenAddrColl; markets[1] = _cTokenAddrBorrow; ComptrollerInterface(COMPTROLLER).enterMarkets(markets); } /// @notice Approves CToken contract to pull underlying tokens from the DSProxy /// @param _tokenAddr Token we are trying to approve /// @param _cTokenAddr Address which will gain the approval function approveCToken(address _tokenAddr, address _cTokenAddr) internal { if (_tokenAddr != ETH_ADDRESS) { ERC20(_tokenAddr).safeApprove(_cTokenAddr, 0); ERC20(_tokenAddr).safeApprove(_cTokenAddr, uint(-1)); } } /// @notice Returns the underlying address of the cToken asset /// @param _cTokenAddress cToken address /// @return Token address of the cToken specified function getUnderlyingAddr(address _cTokenAddress) internal returns (address) { if (_cTokenAddress == CETH_ADDRESS) { return ETH_ADDRESS; } else { return CTokenInterface(_cTokenAddress).underlying(); } } /// @notice Returns the owner of the DSProxy that called the contract function getUserAddress() internal view returns (address) { DSProxy proxy = DSProxy(uint160(address(this))); return proxy.owner(); } /// @notice Returns the maximum amount of collateral available to withdraw /// @dev Due to rounding errors the result is - 1% wei from the exact amount /// @param _cCollAddress Collateral we are getting the max value of /// @param _account Users account /// @return Returns the max. collateral amount in that token function getMaxCollateral(address _cCollAddress, address _account) public returns (uint) { (, uint liquidityInUsd, ) = ComptrollerInterface(COMPTROLLER).getAccountLiquidity(_account); uint usersBalance = CTokenInterface(_cCollAddress).balanceOfUnderlying(_account); address oracle = ComptrollerInterface(COMPTROLLER).oracle(); if (liquidityInUsd == 0) return usersBalance; CTokenInterface(_cCollAddress).accrueInterest(); (, uint collFactorMantissa) = ComptrollerInterface(COMPTROLLER).markets(_cCollAddress); Exp memory collateralFactor = Exp({mantissa: collFactorMantissa}); (, uint tokensToUsd) = divScalarByExpTruncate(liquidityInUsd, collateralFactor); uint usdPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(_cCollAddress); uint liqInToken = wdiv(tokensToUsd, usdPrice); if (liqInToken > usersBalance) return usersBalance; return sub(liqInToken, (liqInToken / 100)); // cut off 1% due to rounding issues } /// @notice Returns the maximum amount of borrow amount available /// @dev Due to rounding errors the result is - 1% wei from the exact amount /// @param _cBorrowAddress Borrow token we are getting the max value of /// @param _account Users account /// @return Returns the max. borrow amount in that token function getMaxBorrow(address _cBorrowAddress, address _account) public returns (uint) { (, uint liquidityInUsd, ) = ComptrollerInterface(COMPTROLLER).getAccountLiquidity(_account); address oracle = ComptrollerInterface(COMPTROLLER).oracle(); CTokenInterface(_cBorrowAddress).accrueInterest(); uint usdPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(_cBorrowAddress); uint liquidityInToken = wdiv(liquidityInUsd, usdPrice); return sub(liquidityInToken, (liquidityInToken / 100)); // cut off 1% due to rounding issues } } contract CompoundImportFlashLoan is FlashLoanReceiverBase { using SafeERC20 for ERC20; ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); address public constant COMPOUND_BORROW_PROXY = 0xb7EDC39bE76107e2Cc645f0f6a3D164f5e173Ee2; address public owner; constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public { owner = msg.sender; } /// @notice Called by Aave when sending back the FL amount /// @param _reserve The address of the borrowed token /// @param _amount Amount of FL tokens received /// @param _fee FL Aave fee /// @param _params The params that are sent from the original FL caller contract function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { ( address cCollateralToken, address cBorrowToken, address user, address proxy ) = abi.decode(_params, (address,address,address,address)); // approve FL tokens so we can repay them ERC20(_reserve).safeApprove(cBorrowToken, 0); ERC20(_reserve).safeApprove(cBorrowToken, uint(-1)); // repay compound debt require(CTokenInterface(cBorrowToken).repayBorrowBehalf(user, uint(-1)) == 0, "Repay borrow behalf fail"); // transfer cTokens to proxy uint cTokenBalance = CTokenInterface(cCollateralToken).balanceOf(user); require(CTokenInterface(cCollateralToken).transferFrom(user, proxy, cTokenBalance)); // borrow bytes memory proxyData = getProxyData(cCollateralToken, cBorrowToken, _reserve, (_amount + _fee)); DSProxyInterface(proxy).execute(COMPOUND_BORROW_PROXY, proxyData); // Repay the loan with the money DSProxy sent back transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); } /// @notice Formats function data call so we can call it through DSProxy /// @param _cCollToken CToken address of collateral /// @param _cBorrowToken CToken address we will borrow /// @param _borrowToken Token address we will borrow /// @param _amount Amount that will be borrowed /// @return proxyData Formated function call data function getProxyData(address _cCollToken, address _cBorrowToken, address _borrowToken, uint _amount) internal pure returns (bytes memory proxyData) { proxyData = abi.encodeWithSignature( "borrow(address,address,address,uint256)", _cCollToken, _cBorrowToken, _borrowToken, _amount); } function withdrawStuckFunds(address _tokenAddr, uint _amount) public { require(owner == msg.sender, "Must be owner"); if (_tokenAddr == 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE) { msg.sender.transfer(_amount); } else { ERC20(_tokenAddr).safeTransfer(owner, _amount); } } } contract CompoundImportTaker is CompoundSaverHelper, ProxyPermission, GasBurner { ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); address payable public constant COMPOUND_IMPORT_FLASH_LOAN = 0x0a9238e14d5A20CDb03811B12D1984587C3CE9a0; address public constant PROXY_REGISTRY_ADDRESS = 0x4678f0a6958e4D2Bc4F1BAF7Bc52E8F3564f3fE4; DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); /// @notice Starts the process to move users position 1 collateral and 1 borrow /// @dev User must approve COMPOUND_IMPORT_FLASH_LOAN to pull _cCollateralToken /// @param _cCollateralToken Collateral we are moving to DSProxy /// @param _cBorrowToken Borrow token we are moving to DSProxy function importLoan(address _cCollateralToken, address _cBorrowToken) external burnGas(20) { address proxy = getProxy(); uint loanAmount = CTokenInterface(_cBorrowToken).borrowBalanceCurrent(msg.sender); bytes memory paramsData = abi.encode(_cCollateralToken, _cBorrowToken, msg.sender, proxy); givePermission(COMPOUND_IMPORT_FLASH_LOAN); lendingPool.flashLoan(COMPOUND_IMPORT_FLASH_LOAN, getUnderlyingAddr(_cBorrowToken), loanAmount, paramsData); removePermission(COMPOUND_IMPORT_FLASH_LOAN); logger.Log(address(this), msg.sender, "CompoundImport", abi.encode(loanAmount, 0, _cCollateralToken)); } /// @notice Gets proxy address, if user doesn't has DSProxy build it /// @return proxy DsProxy address function getProxy() internal returns (address proxy) { proxy = ProxyRegistryInterface(PROXY_REGISTRY_ADDRESS).proxies(msg.sender); if (proxy == address(0)) { proxy = ProxyRegistryInterface(PROXY_REGISTRY_ADDRESS).build(msg.sender); } } } contract CreamBasicProxy is GasBurner { address public constant ETH_ADDR = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant COMPTROLLER_ADDR = 0x3d5BC3c8d13dcB8bF317092d84783c2697AE9258; using SafeERC20 for ERC20; /// @notice User deposits tokens to the cream protocol /// @dev User needs to approve the DSProxy to pull the _tokenAddr tokens /// @param _tokenAddr The address of the token to be deposited /// @param _cTokenAddr CTokens to be deposited /// @param _amount Amount of tokens to be deposited /// @param _inMarket True if the token is already in market for that address function deposit(address _tokenAddr, address _cTokenAddr, uint _amount, bool _inMarket) public burnGas(5) payable { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(this), _amount); } approveToken(_tokenAddr, _cTokenAddr); if (!_inMarket) { enterMarket(_cTokenAddr); } if (_tokenAddr != ETH_ADDR) { require(CTokenInterface(_cTokenAddr).mint(_amount) == 0); } else { CEtherInterface(_cTokenAddr).mint{value: msg.value}(); // reverts on fail } } /// @notice User withdraws tokens to the cream protocol /// @param _tokenAddr The address of the token to be withdrawn /// @param _cTokenAddr CTokens to be withdrawn /// @param _amount Amount of tokens to be withdrawn /// @param _isCAmount If true _amount is cTokens if falls _amount is underlying tokens function withdraw(address _tokenAddr, address _cTokenAddr, uint _amount, bool _isCAmount) public burnGas(5) { if (_isCAmount) { require(CTokenInterface(_cTokenAddr).redeem(_amount) == 0); } else { require(CTokenInterface(_cTokenAddr).redeemUnderlying(_amount) == 0); } // withdraw funds to msg.sender if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransfer(msg.sender, ERC20(_tokenAddr).balanceOf(address(this))); } else { msg.sender.transfer(address(this).balance); } } /// @notice User borrows tokens to the cream protocol /// @param _tokenAddr The address of the token to be borrowed /// @param _cTokenAddr CTokens to be borrowed /// @param _amount Amount of tokens to be borrowed /// @param _inMarket True if the token is already in market for that address function borrow(address _tokenAddr, address _cTokenAddr, uint _amount, bool _inMarket) public burnGas(8) { if (!_inMarket) { enterMarket(_cTokenAddr); } require(CTokenInterface(_cTokenAddr).borrow(_amount) == 0); // withdraw funds to msg.sender if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransfer(msg.sender, ERC20(_tokenAddr).balanceOf(address(this))); } else { msg.sender.transfer(address(this).balance); } } /// @dev User needs to approve the DSProxy to pull the _tokenAddr tokens /// @notice User paybacks tokens to the cream protocol /// @param _tokenAddr The address of the token to be paybacked /// @param _cTokenAddr CTokens to be paybacked /// @param _amount Amount of tokens to be payedback /// @param _wholeDebt If true the _amount will be set to the whole amount of the debt function payback(address _tokenAddr, address _cTokenAddr, uint _amount, bool _wholeDebt) public burnGas(5) payable { approveToken(_tokenAddr, _cTokenAddr); if (_wholeDebt) { _amount = CTokenInterface(_cTokenAddr).borrowBalanceCurrent(address(this)); } if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(this), _amount); require(CTokenInterface(_cTokenAddr).repayBorrow(_amount) == 0); } else { CEtherInterface(_cTokenAddr).repayBorrow{value: msg.value}(); msg.sender.transfer(address(this).balance); // send back the extra eth } } /// @notice Helper method to withdraw tokens from the DSProxy /// @param _tokenAddr Address of the token to be withdrawn function withdrawTokens(address _tokenAddr) public { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransfer(msg.sender, ERC20(_tokenAddr).balanceOf(address(this))); } else { msg.sender.transfer(address(this).balance); } } /// @notice Enters the cream market so it can be deposited/borrowed /// @param _cTokenAddr CToken address of the token function enterMarket(address _cTokenAddr) public { address[] memory markets = new address[](1); markets[0] = _cTokenAddr; ComptrollerInterface(COMPTROLLER_ADDR).enterMarkets(markets); } /// @notice Exits the cream market so it can't be deposited/borrowed /// @param _cTokenAddr CToken address of the token function exitMarket(address _cTokenAddr) public { ComptrollerInterface(COMPTROLLER_ADDR).exitMarket(_cTokenAddr); } /// @notice Approves CToken contract to pull underlying tokens from the DSProxy /// @param _tokenAddr Token we are trying to approve /// @param _cTokenAddr Address which will gain the approval function approveToken(address _tokenAddr, address _cTokenAddr) internal { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeApprove(_cTokenAddr, 0); ERC20(_tokenAddr).safeApprove(_cTokenAddr, uint(-1)); } } } contract CreamLoanInfo is CreamSafetyRatio { struct LoanData { address user; uint128 ratio; address[] collAddr; address[] borrowAddr; uint[] collAmounts; uint[] borrowAmounts; } struct TokenInfo { address cTokenAddress; address underlyingTokenAddress; uint collateralFactor; uint price; } struct TokenInfoFull { address underlyingTokenAddress; uint supplyRate; uint borrowRate; uint exchangeRate; uint marketLiquidity; uint totalSupply; uint totalBorrow; uint collateralFactor; uint price; } address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant CETH_ADDRESS = 0xD06527D5e56A3495252A528C4987003b712860eE; /// @notice Calcualted the ratio of coll/debt for a cream user /// @param _user Address of the user function getRatio(address _user) public view returns (uint) { // For each asset the account is in return getSafetyRatio(_user); } /// @notice Fetches cream prices for tokens /// @param _cTokens Arr. of cTokens for which to get the prices /// @return prices Array of prices function getPrices(address[] memory _cTokens) public view returns (uint[] memory prices) { prices = new uint[](_cTokens.length); address oracleAddr = comp.oracle(); for (uint i = 0; i < _cTokens.length; ++i) { prices[i] = CompoundOracleInterface(oracleAddr).getUnderlyingPrice(_cTokens[i]); } } /// @notice Fetches cream collateral factors for tokens /// @param _cTokens Arr. of cTokens for which to get the coll. factors /// @return collFactors Array of coll. factors function getCollFactors(address[] memory _cTokens) public view returns (uint[] memory collFactors) { collFactors = new uint[](_cTokens.length); for (uint i = 0; i < _cTokens.length; ++i) { (, collFactors[i]) = comp.markets(_cTokens[i]); } } /// @notice Fetches all the collateral/debt address and amounts, denominated in eth /// @param _user Address of the user /// @return data LoanData information function getLoanData(address _user) public view returns (LoanData memory data) { address[] memory assets = comp.getAssetsIn(_user); address oracleAddr = comp.oracle(); data = LoanData({ user: _user, ratio: 0, collAddr: new address[](assets.length), borrowAddr: new address[](assets.length), collAmounts: new uint[](assets.length), borrowAmounts: new uint[](assets.length) }); uint collPos = 0; uint borrowPos = 0; for (uint i = 0; i < assets.length; i++) { address asset = assets[i]; (, uint cTokenBalance, uint borrowBalance, uint exchangeRateMantissa) = CTokenInterface(asset).getAccountSnapshot(_user); Exp memory oraclePrice; if (cTokenBalance != 0 || borrowBalance != 0) { oraclePrice = Exp({mantissa: CompoundOracleInterface(oracleAddr).getUnderlyingPrice(asset)}); } // Sum up collateral in eth if (cTokenBalance != 0) { Exp memory exchangeRate = Exp({mantissa: exchangeRateMantissa}); (, Exp memory tokensToEth) = mulExp(exchangeRate, oraclePrice); data.collAddr[collPos] = asset; (, data.collAmounts[collPos]) = mulScalarTruncate(tokensToEth, cTokenBalance); collPos++; } // Sum up debt in eth if (borrowBalance != 0) { data.borrowAddr[borrowPos] = asset; (, data.borrowAmounts[borrowPos]) = mulScalarTruncate(oraclePrice, borrowBalance); borrowPos++; } } data.ratio = uint128(getSafetyRatio(_user)); return data; } function getTokenBalances(address _user, address[] memory _cTokens) public view returns (uint[] memory balances, uint[] memory borrows) { balances = new uint[](_cTokens.length); borrows = new uint[](_cTokens.length); for (uint i = 0; i < _cTokens.length; i++) { address asset = _cTokens[i]; (, uint cTokenBalance, uint borrowBalance, uint exchangeRateMantissa) = CTokenInterface(asset).getAccountSnapshot(_user); Exp memory exchangeRate = Exp({mantissa: exchangeRateMantissa}); (, balances[i]) = mulScalarTruncate(exchangeRate, cTokenBalance); borrows[i] = borrowBalance; } } /// @notice Fetches all the collateral/debt address and amounts, denominated in eth /// @param _users Addresses of the user /// @return loans Array of LoanData information function getLoanDataArr(address[] memory _users) public view returns (LoanData[] memory loans) { loans = new LoanData[](_users.length); for (uint i = 0; i < _users.length; ++i) { loans[i] = getLoanData(_users[i]); } } /// @notice Calcualted the ratio of coll/debt for a cream user /// @param _users Addresses of the user /// @return ratios Array of ratios function getRatios(address[] memory _users) public view returns (uint[] memory ratios) { ratios = new uint[](_users.length); for (uint i = 0; i < _users.length; ++i) { ratios[i] = getSafetyRatio(_users[i]); } } /// @notice Information about cTokens /// @param _cTokenAddresses Array of cTokens addresses /// @return tokens Array of cTokens infomartion function getTokensInfo(address[] memory _cTokenAddresses) public returns(TokenInfo[] memory tokens) { tokens = new TokenInfo[](_cTokenAddresses.length); address oracleAddr = comp.oracle(); for (uint i = 0; i < _cTokenAddresses.length; ++i) { (, uint collFactor) = comp.markets(_cTokenAddresses[i]); tokens[i] = TokenInfo({ cTokenAddress: _cTokenAddresses[i], underlyingTokenAddress: getUnderlyingAddr(_cTokenAddresses[i]), collateralFactor: collFactor, price: CompoundOracleInterface(oracleAddr).getUnderlyingPrice(_cTokenAddresses[i]) }); } } /// @notice Information about cTokens /// @param _cTokenAddresses Array of cTokens addresses /// @return tokens Array of cTokens infomartion function getFullTokensInfo(address[] memory _cTokenAddresses) public returns(TokenInfoFull[] memory tokens) { tokens = new TokenInfoFull[](_cTokenAddresses.length); address oracleAddr = comp.oracle(); for (uint i = 0; i < _cTokenAddresses.length; ++i) { (, uint collFactor) = comp.markets(_cTokenAddresses[i]); CTokenInterface cToken = CTokenInterface(_cTokenAddresses[i]); tokens[i] = TokenInfoFull({ underlyingTokenAddress: getUnderlyingAddr(_cTokenAddresses[i]), supplyRate: cToken.supplyRatePerBlock(), borrowRate: cToken.borrowRatePerBlock(), exchangeRate: cToken.exchangeRateCurrent(), marketLiquidity: cToken.getCash(), totalSupply: cToken.totalSupply(), totalBorrow: cToken.totalBorrowsCurrent(), collateralFactor: collFactor, price: CompoundOracleInterface(oracleAddr).getUnderlyingPrice(_cTokenAddresses[i]) }); } } /// @notice Returns the underlying address of the cToken asset /// @param _cTokenAddress cToken address /// @return Token address of the cToken specified function getUnderlyingAddr(address _cTokenAddress) internal returns (address) { if (_cTokenAddress == CETH_ADDRESS) { return ETH_ADDRESS; } else { return CTokenInterface(_cTokenAddress).underlying(); } } } contract CreamImportFlashLoan is FlashLoanReceiverBase { using SafeERC20 for ERC20; ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); address public constant CREAM_BORROW_PROXY = 0x87F198Ef6116CdBC5f36B581d212ad950b7e2Ddd; address public owner; constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public { owner = msg.sender; } /// @notice Called by Aave when sending back the FL amount /// @param _reserve The address of the borrowed token /// @param _amount Amount of FL tokens received /// @param _fee FL Aave fee /// @param _params The params that are sent from the original FL caller contract function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { ( address cCollateralToken, address cBorrowToken, address user, address proxy ) = abi.decode(_params, (address,address,address,address)); // approve FL tokens so we can repay them ERC20(_reserve).safeApprove(cBorrowToken, 0); ERC20(_reserve).safeApprove(cBorrowToken, uint(-1)); // repay cream debt require(CTokenInterface(cBorrowToken).repayBorrowBehalf(user, uint(-1)) == 0, "Repay borrow behalf fail"); // transfer cTokens to proxy uint cTokenBalance = CTokenInterface(cCollateralToken).balanceOf(user); require(CTokenInterface(cCollateralToken).transferFrom(user, proxy, cTokenBalance)); // borrow bytes memory proxyData = getProxyData(cCollateralToken, cBorrowToken, _reserve, (_amount + _fee)); DSProxyInterface(proxy).execute(CREAM_BORROW_PROXY, proxyData); // Repay the loan with the money DSProxy sent back transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); } /// @notice Formats function data call so we can call it through DSProxy /// @param _cCollToken CToken address of collateral /// @param _cBorrowToken CToken address we will borrow /// @param _borrowToken Token address we will borrow /// @param _amount Amount that will be borrowed /// @return proxyData Formated function call data function getProxyData(address _cCollToken, address _cBorrowToken, address _borrowToken, uint _amount) internal pure returns (bytes memory proxyData) { proxyData = abi.encodeWithSignature( "borrow(address,address,address,uint256)", _cCollToken, _cBorrowToken, _borrowToken, _amount); } function withdrawStuckFunds(address _tokenAddr, uint _amount) public { require(owner == msg.sender, "Must be owner"); if (_tokenAddr == 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE) { msg.sender.transfer(_amount); } else { ERC20(_tokenAddr).safeTransfer(owner, _amount); } } } contract CreamImportTaker is CreamSaverHelper, ProxyPermission, GasBurner { ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); address payable public constant CREAM_IMPORT_FLASH_LOAN = 0x24F4aC0Fe758c45cf8425D8Fbdd608cca9A7dBf8; address public constant PROXY_REGISTRY_ADDRESS = 0x4678f0a6958e4D2Bc4F1BAF7Bc52E8F3564f3fE4; DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); /// @notice Starts the process to move users position 1 collateral and 1 borrow /// @dev User must approve cream_IMPORT_FLASH_LOAN to pull _cCollateralToken /// @param _cCollateralToken Collateral we are moving to DSProxy /// @param _cBorrowToken Borrow token we are moving to DSProxy function importLoan(address _cCollateralToken, address _cBorrowToken) external burnGas(20) { address proxy = getProxy(); uint loanAmount = CTokenInterface(_cBorrowToken).borrowBalanceCurrent(msg.sender); bytes memory paramsData = abi.encode(_cCollateralToken, _cBorrowToken, msg.sender, proxy); givePermission(CREAM_IMPORT_FLASH_LOAN); lendingPool.flashLoan(CREAM_IMPORT_FLASH_LOAN, getUnderlyingAddr(_cBorrowToken), loanAmount, paramsData); removePermission(CREAM_IMPORT_FLASH_LOAN); logger.Log(address(this), msg.sender, "CreamImport", abi.encode(loanAmount, 0, _cCollateralToken)); } /// @notice Gets proxy address, if user doesn't has DSProxy build it /// @return proxy DsProxy address function getProxy() internal returns (address proxy) { proxy = ProxyRegistryInterface(PROXY_REGISTRY_ADDRESS).proxies(msg.sender); if (proxy == address(0)) { proxy = ProxyRegistryInterface(PROXY_REGISTRY_ADDRESS).build(msg.sender); } } } contract SaverExchangeCore is SaverExchangeHelper, DSMath { // first is empty to keep the legacy order in place enum ExchangeType { _, OASIS, KYBER, UNISWAP, ZEROX } enum ActionType { SELL, BUY } struct ExchangeData { address srcAddr; address destAddr; uint srcAmount; uint destAmount; uint minPrice; address wrapper; address exchangeAddr; bytes callData; uint256 price0x; } /// @notice Internal method that preforms a sell on 0x/on-chain /// @dev Usefull for other DFS contract to integrate for exchanging /// @param exData Exchange data struct /// @return (address, uint) Address of the wrapper used and destAmount function _sell(ExchangeData memory exData) internal returns (address, uint) { address wrapper; uint swapedTokens; bool success; uint tokensLeft = exData.srcAmount; // if selling eth, convert to weth if (exData.srcAddr == KYBER_ETH_ADDRESS) { exData.srcAddr = ethToWethAddr(exData.srcAddr); TokenInterface(WETH_ADDRESS).deposit.value(exData.srcAmount)(); } // Try 0x first and then fallback on specific wrapper if (exData.price0x > 0) { approve0xProxy(exData.srcAddr, exData.srcAmount); uint ethAmount = getProtocolFee(exData.srcAddr, msg.value, exData.srcAmount); (success, swapedTokens, tokensLeft) = takeOrder(exData, ethAmount, ActionType.SELL); if (success) { wrapper = exData.exchangeAddr; } } // fallback to desired wrapper if 0x failed if (!success) { swapedTokens = saverSwap(exData, ActionType.SELL); wrapper = exData.wrapper; } require(getBalance(exData.destAddr) >= wmul(exData.minPrice, exData.srcAmount), "Final amount isn't correct"); // if anything is left in weth, pull it to user as eth if (getBalance(WETH_ADDRESS) > 0) { TokenInterface(WETH_ADDRESS).withdraw( TokenInterface(WETH_ADDRESS).balanceOf(address(this)) ); } return (wrapper, swapedTokens); } /// @notice Internal method that preforms a buy on 0x/on-chain /// @dev Usefull for other DFS contract to integrate for exchanging /// @param exData Exchange data struct /// @return (address, uint) Address of the wrapper used and srcAmount function _buy(ExchangeData memory exData) internal returns (address, uint) { address wrapper; uint swapedTokens; bool success; require(exData.destAmount != 0, "Dest amount must be specified"); // if selling eth, convert to weth if (exData.srcAddr == KYBER_ETH_ADDRESS) { exData.srcAddr = ethToWethAddr(exData.srcAddr); TokenInterface(WETH_ADDRESS).deposit.value(exData.srcAmount)(); } if (exData.price0x > 0) { approve0xProxy(exData.srcAddr, exData.srcAmount); uint ethAmount = getProtocolFee(exData.srcAddr, msg.value, exData.srcAmount); (success, swapedTokens,) = takeOrder(exData, ethAmount, ActionType.BUY); if (success) { wrapper = exData.exchangeAddr; } } // fallback to desired wrapper if 0x failed if (!success) { swapedTokens = saverSwap(exData, ActionType.BUY); wrapper = exData.wrapper; } require(swapedTokens >= exData.destAmount, "Final amount isn't correct"); // if anything is left in weth, pull it to user as eth if (getBalance(WETH_ADDRESS) > 0) { TokenInterface(WETH_ADDRESS).withdraw( TokenInterface(WETH_ADDRESS).balanceOf(address(this)) ); } return (wrapper, getBalance(exData.destAddr)); } /// @notice Takes order from 0x and returns bool indicating if it is successful /// @param _exData Exchange data /// @param _ethAmount Ether fee needed for 0x order function takeOrder( ExchangeData memory _exData, uint256 _ethAmount, ActionType _type ) private returns (bool success, uint256, uint256) { // write in the exact amount we are selling/buing in an order if (_type == ActionType.SELL) { writeUint256(_exData.callData, 36, _exData.srcAmount); } else { writeUint256(_exData.callData, 36, _exData.destAmount); } if (ZrxAllowlist(ZRX_ALLOWLIST_ADDR).isNonPayableAddr(_exData.exchangeAddr)) { _ethAmount = 0; } uint256 tokensBefore = getBalance(_exData.destAddr); if (ZrxAllowlist(ZRX_ALLOWLIST_ADDR).isZrxAddr(_exData.exchangeAddr)) { (success, ) = _exData.exchangeAddr.call{value: _ethAmount}(_exData.callData); } else { success = false; } uint256 tokensSwaped = 0; uint256 tokensLeft = _exData.srcAmount; if (success) { // check to see if any _src tokens are left over after exchange tokensLeft = getBalance(_exData.srcAddr); // convert weth -> eth if needed if (_exData.destAddr == KYBER_ETH_ADDRESS) { TokenInterface(WETH_ADDRESS).withdraw( TokenInterface(WETH_ADDRESS).balanceOf(address(this)) ); } // get the current balance of the swaped tokens tokensSwaped = getBalance(_exData.destAddr) - tokensBefore; } return (success, tokensSwaped, tokensLeft); } /// @notice Calls wraper contract for exchage to preform an on-chain swap /// @param _exData Exchange data struct /// @param _type Type of action SELL|BUY /// @return swapedTokens For Sell that the destAmount, for Buy thats the srcAmount function saverSwap(ExchangeData memory _exData, ActionType _type) internal returns (uint swapedTokens) { require(SaverExchangeRegistry(SAVER_EXCHANGE_REGISTRY).isWrapper(_exData.wrapper), "Wrapper is not valid"); uint ethValue = 0; ERC20(_exData.srcAddr).safeTransfer(_exData.wrapper, _exData.srcAmount); if (_type == ActionType.SELL) { swapedTokens = ExchangeInterfaceV2(_exData.wrapper). sell{value: ethValue}(_exData.srcAddr, _exData.destAddr, _exData.srcAmount); } else { swapedTokens = ExchangeInterfaceV2(_exData.wrapper). buy{value: ethValue}(_exData.srcAddr, _exData.destAddr, _exData.destAmount); } } function writeUint256(bytes memory _b, uint256 _index, uint _input) internal pure { if (_b.length < _index + 32) { revert("Incorrent lengt while writting bytes32"); } bytes32 input = bytes32(_input); _index += 32; // Read the bytes32 from array memory assembly { mstore(add(_b, _index), input) } } /// @notice Converts Kybers Eth address -> Weth /// @param _src Input address function ethToWethAddr(address _src) internal pure returns (address) { return _src == KYBER_ETH_ADDRESS ? WETH_ADDRESS : _src; } /// @notice Calculates protocol fee /// @param _srcAddr selling token address (if eth should be WETH) /// @param _msgValue msg.value in transaction /// @param _srcAmount amount we are selling function getProtocolFee(address _srcAddr, uint256 _msgValue, uint256 _srcAmount) internal returns(uint256) { // if we are not selling ETH msg value is always the protocol fee if (_srcAddr != WETH_ADDRESS) return _msgValue; // if msg value is larger than srcAmount, that means that msg value is protocol fee + srcAmount, so we subsctract srcAmount from msg value // we have an edge case here when protocol fee is higher than selling amount if (_msgValue > _srcAmount) return _msgValue - _srcAmount; // if msg value is lower than src amount, that means that srcAmount isn't included in msg value, so we return msg value return _msgValue; } function packExchangeData(ExchangeData memory _exData) public pure returns(bytes memory) { // splitting in two different bytes and encoding all because of stack too deep in decoding part bytes memory part1 = abi.encode( _exData.srcAddr, _exData.destAddr, _exData.srcAmount, _exData.destAmount ); bytes memory part2 = abi.encode( _exData.minPrice, _exData.wrapper, _exData.exchangeAddr, _exData.callData, _exData.price0x ); return abi.encode(part1, part2); } function unpackExchangeData(bytes memory _data) public pure returns(ExchangeData memory _exData) { ( bytes memory part1, bytes memory part2 ) = abi.decode(_data, (bytes,bytes)); ( _exData.srcAddr, _exData.destAddr, _exData.srcAmount, _exData.destAmount ) = abi.decode(part1, (address,address,uint256,uint256)); ( _exData.minPrice, _exData.wrapper, _exData.exchangeAddr, _exData.callData, _exData.price0x ) = abi.decode(part2, (uint256,address,address,bytes,uint256)); } // solhint-disable-next-line no-empty-blocks receive() external virtual payable {} } contract KyberWrapper is DSMath, ExchangeInterfaceV2, AdminAuth { address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant KYBER_INTERFACE = 0x9AAb3f75489902f3a48495025729a0AF77d4b11e; address payable public constant WALLET_ID = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; using SafeERC20 for ERC20; /// @notice Sells a _srcAmount of tokens at Kyber /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Destination amount function sell(address _srcAddr, address _destAddr, uint _srcAmount) external override payable returns (uint) { ERC20 srcToken = ERC20(_srcAddr); ERC20 destToken = ERC20(_destAddr); KyberNetworkProxyInterface kyberNetworkProxy = KyberNetworkProxyInterface(KYBER_INTERFACE); if (_srcAddr != KYBER_ETH_ADDRESS) { srcToken.safeApprove(address(kyberNetworkProxy), _srcAmount); } uint destAmount = kyberNetworkProxy.trade{value: msg.value}( srcToken, _srcAmount, destToken, msg.sender, uint(-1), 0, WALLET_ID ); return destAmount; } /// @notice Buys a _destAmount of tokens at Kyber /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint srcAmount function buy(address _srcAddr, address _destAddr, uint _destAmount) external override payable returns(uint) { ERC20 srcToken = ERC20(_srcAddr); ERC20 destToken = ERC20(_destAddr); uint srcAmount = 0; if (_srcAddr != KYBER_ETH_ADDRESS) { srcAmount = srcToken.balanceOf(address(this)); } else { srcAmount = msg.value; } KyberNetworkProxyInterface kyberNetworkProxy = KyberNetworkProxyInterface(KYBER_INTERFACE); if (_srcAddr != KYBER_ETH_ADDRESS) { srcToken.safeApprove(address(kyberNetworkProxy), srcAmount); } uint destAmount = kyberNetworkProxy.trade{value: msg.value}( srcToken, srcAmount, destToken, msg.sender, _destAmount, 0, WALLET_ID ); require(destAmount == _destAmount, "Wrong dest amount"); uint srcAmountAfter = 0; if (_srcAddr != KYBER_ETH_ADDRESS) { srcAmountAfter = srcToken.balanceOf(address(this)); } else { srcAmountAfter = address(this).balance; } // Send the leftover from the source token back sendLeftOver(_srcAddr); return (srcAmount - srcAmountAfter); } /// @notice Return a rate for which we can sell an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return rate Rate function getSellRate(address _srcAddr, address _destAddr, uint _srcAmount) public override view returns (uint rate) { (rate, ) = KyberNetworkProxyInterface(KYBER_INTERFACE) .getExpectedRate(ERC20(_srcAddr), ERC20(_destAddr), _srcAmount); // multiply with decimal difference in src token rate = rate * (10**(18 - getDecimals(_srcAddr))); // divide with decimal difference in dest token rate = rate / (10**(18 - getDecimals(_destAddr))); } /// @notice Return a rate for which we can buy an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return rate Rate function getBuyRate(address _srcAddr, address _destAddr, uint _destAmount) public override view returns (uint rate) { uint256 srcRate = getSellRate(_destAddr, _srcAddr, _destAmount); uint256 srcAmount = wmul(srcRate, _destAmount); rate = getSellRate(_srcAddr, _destAddr, srcAmount); // increase rate by 3% too account for inaccuracy between sell/buy conversion rate = rate + (rate / 30); } /// @notice Send any leftover tokens, we use to clear out srcTokens after buy /// @param _srcAddr Source token address function sendLeftOver(address _srcAddr) internal { msg.sender.transfer(address(this).balance); if (_srcAddr != KYBER_ETH_ADDRESS) { ERC20(_srcAddr).safeTransfer(msg.sender, ERC20(_srcAddr).balanceOf(address(this))); } } receive() payable external {} function getDecimals(address _token) internal view returns (uint256) { if (_token == KYBER_ETH_ADDRESS) return 18; return ERC20(_token).decimals(); } } contract OasisTradeWrapper is DSMath, ExchangeInterfaceV2, AdminAuth { using SafeERC20 for ERC20; address public constant OTC_ADDRESS = 0x794e6e91555438aFc3ccF1c5076A74F42133d08D; address public constant WETH_ADDRESS = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; /// @notice Sells a _srcAmount of tokens at Oasis /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Destination amount function sell(address _srcAddr, address _destAddr, uint _srcAmount) external override payable returns (uint) { address srcAddr = ethToWethAddr(_srcAddr); address destAddr = ethToWethAddr(_destAddr); ERC20(srcAddr).safeApprove(OTC_ADDRESS, _srcAmount); uint destAmount = OasisInterface(OTC_ADDRESS).sellAllAmount(srcAddr, _srcAmount, destAddr, 0); // convert weth -> eth and send back if (destAddr == WETH_ADDRESS) { TokenInterface(WETH_ADDRESS).withdraw(destAmount); msg.sender.transfer(destAmount); } else { ERC20(destAddr).safeTransfer(msg.sender, destAmount); } return destAmount; } /// @notice Buys a _destAmount of tokens at Oasis /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint srcAmount function buy(address _srcAddr, address _destAddr, uint _destAmount) external override payable returns(uint) { address srcAddr = ethToWethAddr(_srcAddr); address destAddr = ethToWethAddr(_destAddr); ERC20(srcAddr).safeApprove(OTC_ADDRESS, uint(-1)); uint srcAmount = OasisInterface(OTC_ADDRESS).buyAllAmount(destAddr, _destAmount, srcAddr, uint(-1)); // convert weth -> eth and send back if (destAddr == WETH_ADDRESS) { TokenInterface(WETH_ADDRESS).withdraw(_destAmount); msg.sender.transfer(_destAmount); } else { ERC20(destAddr).safeTransfer(msg.sender, _destAmount); } // Send the leftover from the source token back sendLeftOver(srcAddr); return srcAmount; } /// @notice Return a rate for which we can sell an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Rate function getSellRate(address _srcAddr, address _destAddr, uint _srcAmount) public override view returns (uint) { address srcAddr = ethToWethAddr(_srcAddr); address destAddr = ethToWethAddr(_destAddr); return wdiv(OasisInterface(OTC_ADDRESS).getBuyAmount(destAddr, srcAddr, _srcAmount), _srcAmount); } /// @notice Return a rate for which we can buy an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint Rate function getBuyRate(address _srcAddr, address _destAddr, uint _destAmount) public override view returns (uint) { address srcAddr = ethToWethAddr(_srcAddr); address destAddr = ethToWethAddr(_destAddr); return wdiv(1 ether, wdiv(OasisInterface(OTC_ADDRESS).getPayAmount(srcAddr, destAddr, _destAmount), _destAmount)); } /// @notice Send any leftover tokens, we use to clear out srcTokens after buy /// @param _srcAddr Source token address function sendLeftOver(address _srcAddr) internal { msg.sender.transfer(address(this).balance); if (_srcAddr != KYBER_ETH_ADDRESS) { ERC20(_srcAddr).safeTransfer(msg.sender, ERC20(_srcAddr).balanceOf(address(this))); } } /// @notice Converts Kybers Eth address -> Weth /// @param _src Input address function ethToWethAddr(address _src) internal pure returns (address) { return _src == KYBER_ETH_ADDRESS ? WETH_ADDRESS : _src; } receive() payable external {} } contract UniswapV2Wrapper is DSMath, ExchangeInterfaceV2, AdminAuth { address public constant WETH_ADDRESS = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; UniswapRouterInterface public constant router = UniswapRouterInterface(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D); using SafeERC20 for ERC20; /// @notice Sells a _srcAmount of tokens at UniswapV2 /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Destination amount function sell(address _srcAddr, address _destAddr, uint _srcAmount) external payable override returns (uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); uint[] memory amounts; address[] memory path = new address[](2); path[0] = _srcAddr; path[1] = _destAddr; ERC20(_srcAddr).safeApprove(address(router), _srcAmount); // if we are buying ether if (_destAddr == WETH_ADDRESS) { amounts = router.swapExactTokensForETH(_srcAmount, 1, path, msg.sender, block.timestamp + 1); } // if we are selling token to token else { amounts = router.swapExactTokensForTokens(_srcAmount, 1, path, msg.sender, block.timestamp + 1); } return amounts[amounts.length - 1]; } /// @notice Buys a _destAmount of tokens at UniswapV2 /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint srcAmount function buy(address _srcAddr, address _destAddr, uint _destAmount) external override payable returns(uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); uint[] memory amounts; address[] memory path = new address[](2); path[0] = _srcAddr; path[1] = _destAddr; ERC20(_srcAddr).safeApprove(address(router), uint(-1)); // if we are buying ether if (_destAddr == WETH_ADDRESS) { amounts = router.swapTokensForExactETH(_destAmount, uint(-1), path, msg.sender, block.timestamp + 1); } // if we are buying token to token else { amounts = router.swapTokensForExactTokens(_destAmount, uint(-1), path, msg.sender, block.timestamp + 1); } // Send the leftover from the source token back sendLeftOver(_srcAddr); return amounts[0]; } /// @notice Return a rate for which we can sell an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Rate function getSellRate(address _srcAddr, address _destAddr, uint _srcAmount) public override view returns (uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); address[] memory path = new address[](2); path[0] = _srcAddr; path[1] = _destAddr; uint[] memory amounts = router.getAmountsOut(_srcAmount, path); return wdiv(amounts[amounts.length - 1], _srcAmount); } /// @notice Return a rate for which we can buy an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint Rate function getBuyRate(address _srcAddr, address _destAddr, uint _destAmount) public override view returns (uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); address[] memory path = new address[](2); path[0] = _srcAddr; path[1] = _destAddr; uint[] memory amounts = router.getAmountsIn(_destAmount, path); return wdiv(_destAmount, amounts[0]); } /// @notice Send any leftover tokens, we use to clear out srcTokens after buy /// @param _srcAddr Source token address function sendLeftOver(address _srcAddr) internal { msg.sender.transfer(address(this).balance); if (_srcAddr != KYBER_ETH_ADDRESS) { ERC20(_srcAddr).safeTransfer(msg.sender, ERC20(_srcAddr).balanceOf(address(this))); } } /// @notice Converts Kybers Eth address -> Weth /// @param _src Input address function ethToWethAddr(address _src) internal pure returns (address) { return _src == KYBER_ETH_ADDRESS ? WETH_ADDRESS : _src; } function getDecimals(address _token) internal view returns (uint256) { if (_token == KYBER_ETH_ADDRESS) return 18; return ERC20(_token).decimals(); } receive() payable external {} } contract UniswapWrapper is DSMath, ExchangeInterfaceV2, AdminAuth { address public constant WETH_ADDRESS = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant UNISWAP_FACTORY = 0xc0a47dFe034B400B47bDaD5FecDa2621de6c4d95; using SafeERC20 for ERC20; /// @notice Sells a _srcAmount of tokens at Uniswap /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Destination amount function sell(address _srcAddr, address _destAddr, uint _srcAmount) external payable override returns (uint) { address uniswapExchangeAddr; uint destAmount; _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); // if we are buying ether if (_destAddr == WETH_ADDRESS) { uniswapExchangeAddr = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr); ERC20(_srcAddr).safeApprove(uniswapExchangeAddr, _srcAmount); destAmount = UniswapExchangeInterface(uniswapExchangeAddr). tokenToEthTransferInput(_srcAmount, 1, block.timestamp + 1, msg.sender); } // if we are selling token to token else { uniswapExchangeAddr = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr); ERC20(_srcAddr).safeApprove(uniswapExchangeAddr, _srcAmount); destAmount = UniswapExchangeInterface(uniswapExchangeAddr). tokenToTokenTransferInput(_srcAmount, 1, 1, block.timestamp + 1, msg.sender, _destAddr); } return destAmount; } /// @notice Buys a _destAmount of tokens at Uniswap /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint srcAmount function buy(address _srcAddr, address _destAddr, uint _destAmount) external override payable returns(uint) { address uniswapExchangeAddr; uint srcAmount; _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); // if we are buying ether if (_destAddr == WETH_ADDRESS) { uniswapExchangeAddr = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr); ERC20(_srcAddr).safeApprove(uniswapExchangeAddr, uint(-1)); srcAmount = UniswapExchangeInterface(uniswapExchangeAddr). tokenToEthTransferOutput(_destAmount, uint(-1), block.timestamp + 1, msg.sender); } // if we are buying token to token else { uniswapExchangeAddr = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr); ERC20(_srcAddr).safeApprove(uniswapExchangeAddr, uint(-1)); srcAmount = UniswapExchangeInterface(uniswapExchangeAddr). tokenToTokenTransferOutput(_destAmount, uint(-1), uint(-1), block.timestamp + 1, msg.sender, _destAddr); } // Send the leftover from the source token back sendLeftOver(_srcAddr); return srcAmount; } /// @notice Return a rate for which we can sell an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Rate function getSellRate(address _srcAddr, address _destAddr, uint _srcAmount) public override view returns (uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); if(_srcAddr == WETH_ADDRESS) { address uniswapTokenAddress = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_destAddr); return wdiv(UniswapExchangeInterface(uniswapTokenAddress).getEthToTokenInputPrice(_srcAmount), _srcAmount); } else if (_destAddr == WETH_ADDRESS) { address uniswapTokenAddress = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr); return wdiv(UniswapExchangeInterface(uniswapTokenAddress).getTokenToEthInputPrice(_srcAmount), _srcAmount); } else { uint ethBought = UniswapExchangeInterface(UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr)).getTokenToEthInputPrice(_srcAmount); return wdiv(UniswapExchangeInterface(UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_destAddr)).getEthToTokenInputPrice(ethBought), _srcAmount); } } /// @notice Return a rate for which we can buy an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint Rate function getBuyRate(address _srcAddr, address _destAddr, uint _destAmount) public override view returns (uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); if(_srcAddr == WETH_ADDRESS) { address uniswapTokenAddress = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_destAddr); return wdiv(1 ether, wdiv(UniswapExchangeInterface(uniswapTokenAddress).getEthToTokenOutputPrice(_destAmount), _destAmount)); } else if (_destAddr == WETH_ADDRESS) { address uniswapTokenAddress = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr); return wdiv(1 ether, wdiv(UniswapExchangeInterface(uniswapTokenAddress).getTokenToEthOutputPrice(_destAmount), _destAmount)); } else { uint ethNeeded = UniswapExchangeInterface(UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_destAddr)).getTokenToEthOutputPrice(_destAmount); return wdiv(1 ether, wdiv(UniswapExchangeInterface(UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr)).getEthToTokenOutputPrice(ethNeeded), _destAmount)); } } /// @notice Send any leftover tokens, we use to clear out srcTokens after buy /// @param _srcAddr Source token address function sendLeftOver(address _srcAddr) internal { msg.sender.transfer(address(this).balance); if (_srcAddr != KYBER_ETH_ADDRESS) { ERC20(_srcAddr).safeTransfer(msg.sender, ERC20(_srcAddr).balanceOf(address(this))); } } /// @notice Converts Kybers Eth address -> Weth /// @param _src Input address function ethToWethAddr(address _src) internal pure returns (address) { return _src == KYBER_ETH_ADDRESS ? WETH_ADDRESS : _src; } receive() payable external {} } contract DyDxFlashLoanTaker is DydxFlashLoanBase, ProxyPermission { address public constant WETH_ADDR = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; /// @notice Takes flash loan for _receiver /// @dev Receiver must send back WETH + 2 wei after executing transaction /// @dev Method is meant to be called from proxy and proxy will give authorization to _receiver /// @param _receiver Address of funds receiver /// @param _ethAmount ETH amount that needs to be pulled from dydx /// @param _encodedData Bytes with packed data function takeLoan(address _receiver, uint256 _ethAmount, bytes memory _encodedData) public { ISoloMargin solo = ISoloMargin(SOLO_MARGIN_ADDRESS); // Get marketId from token address uint256 marketId = _getMarketIdFromTokenAddress(WETH_ADDR); // Calculate repay amount (_amount + (2 wei)) // Approve transfer from uint256 repayAmount = _getRepaymentAmountInternal(_ethAmount); ERC20(WETH_ADDR).approve(SOLO_MARGIN_ADDRESS, repayAmount); Actions.ActionArgs[] memory operations = new Actions.ActionArgs[](3); operations[0] = _getWithdrawAction(marketId, _ethAmount, _receiver); operations[1] = _getCallAction( _encodedData, _receiver ); operations[2] = _getDepositAction(marketId, repayAmount, address(this)); Account.Info[] memory accountInfos = new Account.Info[](1); accountInfos[0] = _getAccountInfo(); givePermission(_receiver); solo.operate(accountInfos, operations); removePermission(_receiver); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "DyDxFlashLoanTaken", abi.encode(_receiver, _ethAmount, _encodedData)); } } abstract contract CTokenInterface is ERC20 { function mint(uint256 mintAmount) external virtual returns (uint256); // function mint() external virtual payable; function accrueInterest() public virtual returns (uint); function redeem(uint256 redeemTokens) external virtual returns (uint256); function redeemUnderlying(uint256 redeemAmount) external virtual returns (uint256); function borrow(uint256 borrowAmount) external virtual returns (uint256); function repayBorrow(uint256 repayAmount) external virtual returns (uint256); function repayBorrow() external virtual payable; function repayBorrowBehalf(address borrower, uint256 repayAmount) external virtual returns (uint256); function repayBorrowBehalf(address borrower) external virtual payable; function liquidateBorrow(address borrower, uint256 repayAmount, address cTokenCollateral) external virtual returns (uint256); function liquidateBorrow(address borrower, address cTokenCollateral) external virtual payable; function exchangeRateCurrent() external virtual returns (uint256); function supplyRatePerBlock() external virtual returns (uint256); function borrowRatePerBlock() external virtual returns (uint256); function totalReserves() external virtual returns (uint256); function reserveFactorMantissa() external virtual returns (uint256); function borrowBalanceCurrent(address account) external virtual returns (uint256); function totalBorrowsCurrent() external virtual returns (uint256); function getCash() external virtual returns (uint256); function balanceOfUnderlying(address owner) external virtual returns (uint256); function underlying() external virtual returns (address); function getAccountSnapshot(address account) external virtual view returns (uint, uint, uint, uint); } abstract contract ISubscriptionsV2 is StaticV2 { function getOwner(uint _cdpId) external view virtual returns(address); function getSubscribedInfo(uint _cdpId) public view virtual returns(bool, uint128, uint128, uint128, uint128, address, uint coll, uint debt); function getCdpHolder(uint _cdpId) public view virtual returns (bool subscribed, CdpHolder memory); } contract MCDMonitorV2 is DSMath, AdminAuth, GasBurner, StaticV2 { uint public REPAY_GAS_TOKEN = 25; uint public BOOST_GAS_TOKEN = 25; uint public MAX_GAS_PRICE = 200000000000; // 200 gwei uint public REPAY_GAS_COST = 2500000; uint public BOOST_GAS_COST = 2500000; MCDMonitorProxyV2 public monitorProxyContract; ISubscriptionsV2 public subscriptionsContract; address public mcdSaverTakerAddress; address public constant BOT_REGISTRY_ADDRESS = 0x637726f8b08a7ABE3aE3aCaB01A80E2d8ddeF77B; Manager public manager = Manager(0x5ef30b9986345249bc32d8928B7ee64DE9435E39); Vat public vat = Vat(0x35D1b3F3D7966A1DFe207aa4514C12a259A0492B); Spotter public spotter = Spotter(0x65C79fcB50Ca1594B025960e539eD7A9a6D434A3); DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); modifier onlyApproved() { require(BotRegistry(BOT_REGISTRY_ADDRESS).botList(msg.sender), "Not auth bot"); _; } constructor(address _monitorProxy, address _subscriptions, address _mcdSaverTakerAddress) public { monitorProxyContract = MCDMonitorProxyV2(_monitorProxy); subscriptionsContract = ISubscriptionsV2(_subscriptions); mcdSaverTakerAddress = _mcdSaverTakerAddress; } /// @notice Bots call this method to repay for user when conditions are met /// @dev If the contract ownes gas token it will try and use it for gas price reduction function repayFor( SaverExchangeCore.ExchangeData memory _exchangeData, uint _cdpId, uint _nextPrice, address _joinAddr ) public payable onlyApproved burnGas(REPAY_GAS_TOKEN) { (bool isAllowed, uint ratioBefore) = canCall(Method.Repay, _cdpId, _nextPrice); require(isAllowed); uint gasCost = calcGasCost(REPAY_GAS_COST); address owner = subscriptionsContract.getOwner(_cdpId); monitorProxyContract.callExecute{value: msg.value}( owner, mcdSaverTakerAddress, abi.encodeWithSignature( "repayWithLoan((address,address,uint256,uint256,uint256,address,address,bytes,uint256),uint256,uint256,address)", _exchangeData, _cdpId, gasCost, _joinAddr)); (bool isGoodRatio, uint ratioAfter) = ratioGoodAfter(Method.Repay, _cdpId, _nextPrice); require(isGoodRatio); returnEth(); logger.Log(address(this), owner, "AutomaticMCDRepay", abi.encode(ratioBefore, ratioAfter)); } /// @notice Bots call this method to boost for user when conditions are met /// @dev If the contract ownes gas token it will try and use it for gas price reduction function boostFor( SaverExchangeCore.ExchangeData memory _exchangeData, uint _cdpId, uint _nextPrice, address _joinAddr ) public payable onlyApproved burnGas(BOOST_GAS_TOKEN) { (bool isAllowed, uint ratioBefore) = canCall(Method.Boost, _cdpId, _nextPrice); require(isAllowed); uint gasCost = calcGasCost(BOOST_GAS_COST); address owner = subscriptionsContract.getOwner(_cdpId); monitorProxyContract.callExecute{value: msg.value}( owner, mcdSaverTakerAddress, abi.encodeWithSignature( "boostWithLoan((address,address,uint256,uint256,uint256,address,address,bytes,uint256),uint256,uint256,address)", _exchangeData, _cdpId, gasCost, _joinAddr)); (bool isGoodRatio, uint ratioAfter) = ratioGoodAfter(Method.Boost, _cdpId, _nextPrice); require(isGoodRatio); returnEth(); logger.Log(address(this), owner, "AutomaticMCDBoost", abi.encode(ratioBefore, ratioAfter)); } /******************* INTERNAL METHODS ********************************/ function returnEth() internal { // return if some eth left if (address(this).balance > 0) { msg.sender.transfer(address(this).balance); } } /******************* STATIC METHODS ********************************/ /// @notice Returns an address that owns the CDP /// @param _cdpId Id of the CDP function getOwner(uint _cdpId) public view returns(address) { return manager.owns(_cdpId); } /// @notice Gets CDP info (collateral, debt) /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP function getCdpInfo(uint _cdpId, bytes32 _ilk) public view returns (uint, uint) { address urn = manager.urns(_cdpId); (uint collateral, uint debt) = vat.urns(_ilk, urn); (,uint rate,,,) = vat.ilks(_ilk); return (collateral, rmul(debt, rate)); } /// @notice Gets a price of the asset /// @param _ilk Ilk of the CDP function getPrice(bytes32 _ilk) public view returns (uint) { (, uint mat) = spotter.ilks(_ilk); (,,uint spot,,) = vat.ilks(_ilk); return rmul(rmul(spot, spotter.par()), mat); } /// @notice Gets CDP ratio /// @param _cdpId Id of the CDP /// @param _nextPrice Next price for user function getRatio(uint _cdpId, uint _nextPrice) public view returns (uint) { bytes32 ilk = manager.ilks(_cdpId); uint price = (_nextPrice == 0) ? getPrice(ilk) : _nextPrice; (uint collateral, uint debt) = getCdpInfo(_cdpId, ilk); if (debt == 0) return 0; return rdiv(wmul(collateral, price), debt) / (10 ** 18); } /// @notice Checks if Boost/Repay could be triggered for the CDP /// @dev Called by MCDMonitor to enforce the min/max check function canCall(Method _method, uint _cdpId, uint _nextPrice) public view returns(bool, uint) { bool subscribed; CdpHolder memory holder; (subscribed, holder) = subscriptionsContract.getCdpHolder(_cdpId); // check if cdp is subscribed if (!subscribed) return (false, 0); // check if using next price is allowed if (_nextPrice > 0 && !holder.nextPriceEnabled) return (false, 0); // check if boost and boost allowed if (_method == Method.Boost && !holder.boostEnabled) return (false, 0); // check if owner is still owner if (getOwner(_cdpId) != holder.owner) return (false, 0); uint currRatio = getRatio(_cdpId, _nextPrice); if (_method == Method.Repay) { return (currRatio < holder.minRatio, currRatio); } else if (_method == Method.Boost) { return (currRatio > holder.maxRatio, currRatio); } } /// @dev After the Boost/Repay check if the ratio doesn't trigger another call function ratioGoodAfter(Method _method, uint _cdpId, uint _nextPrice) public view returns(bool, uint) { CdpHolder memory holder; (, holder) = subscriptionsContract.getCdpHolder(_cdpId); uint currRatio = getRatio(_cdpId, _nextPrice); if (_method == Method.Repay) { return (currRatio < holder.maxRatio, currRatio); } else if (_method == Method.Boost) { return (currRatio > holder.minRatio, currRatio); } } /// @notice Calculates gas cost (in Eth) of tx /// @dev Gas price is limited to MAX_GAS_PRICE to prevent attack of draining user CDP /// @param _gasAmount Amount of gas used for the tx function calcGasCost(uint _gasAmount) public view returns (uint) { uint gasPrice = tx.gasprice <= MAX_GAS_PRICE ? tx.gasprice : MAX_GAS_PRICE; return mul(gasPrice, _gasAmount); } /******************* OWNER ONLY OPERATIONS ********************************/ /// @notice Allows owner to change gas cost for boost operation, but only up to 3 millions /// @param _gasCost New gas cost for boost method function changeBoostGasCost(uint _gasCost) public onlyOwner { require(_gasCost < 3000000); BOOST_GAS_COST = _gasCost; } /// @notice Allows owner to change gas cost for repay operation, but only up to 3 millions /// @param _gasCost New gas cost for repay method function changeRepayGasCost(uint _gasCost) public onlyOwner { require(_gasCost < 3000000); REPAY_GAS_COST = _gasCost; } /// @notice Allows owner to change max gas price /// @param _maxGasPrice New max gas price function changeMaxGasPrice(uint _maxGasPrice) public onlyOwner { require(_maxGasPrice < 500000000000); MAX_GAS_PRICE = _maxGasPrice; } /// @notice Allows owner to change the amount of gas token burned per function call /// @param _gasAmount Amount of gas token /// @param _isRepay Flag to know for which function we are setting the gas token amount function changeGasTokenAmount(uint _gasAmount, bool _isRepay) public onlyOwner { if (_isRepay) { REPAY_GAS_TOKEN = _gasAmount; } else { BOOST_GAS_TOKEN = _gasAmount; } } } contract MCDCloseFlashLoan is SaverExchangeCore, MCDSaverProxyHelper, FlashLoanReceiverBase, AdminAuth { ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); uint public constant SERVICE_FEE = 400; // 0.25% Fee bytes32 internal constant ETH_ILK = 0x4554482d41000000000000000000000000000000000000000000000000000000; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; address public constant DAI_JOIN_ADDRESS = 0x9759A6Ac90977b93B58547b4A71c78317f391A28; address public constant ETH_JOIN_ADDRESS = 0x2F0b23f53734252Bda2277357e97e1517d6B042A; address public constant SPOTTER_ADDRESS = 0x65C79fcB50Ca1594B025960e539eD7A9a6D434A3; address public constant VAT_ADDRESS = 0x35D1b3F3D7966A1DFe207aa4514C12a259A0492B; Manager public constant manager = Manager(0x5ef30b9986345249bc32d8928B7ee64DE9435E39); DaiJoin public constant daiJoin = DaiJoin(DAI_JOIN_ADDRESS); Spotter public constant spotter = Spotter(SPOTTER_ADDRESS); Vat public constant vat = Vat(VAT_ADDRESS); struct CloseData { uint cdpId; uint collAmount; uint daiAmount; uint minAccepted; address joinAddr; address proxy; uint flFee; bool toDai; address reserve; uint amount; } constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public {} function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { ( uint[8] memory numData, address[5] memory addrData, bytes memory callData, address proxy, bool toDai ) = abi.decode(_params, (uint256[8],address[5],bytes,address,bool)); ExchangeData memory exchangeData = ExchangeData({ srcAddr: addrData[0], destAddr: addrData[1], srcAmount: numData[4], destAmount: numData[5], minPrice: numData[6], wrapper: addrData[3], exchangeAddr: addrData[2], callData: callData, price0x: numData[7] }); CloseData memory closeData = CloseData({ cdpId: numData[0], collAmount: numData[1], daiAmount: numData[2], minAccepted: numData[3], joinAddr: addrData[4], proxy: proxy, flFee: _fee, toDai: toDai, reserve: _reserve, amount: _amount }); address user = DSProxy(payable(closeData.proxy)).owner(); closeCDP(closeData, exchangeData, user); } function closeCDP( CloseData memory _closeData, ExchangeData memory _exchangeData, address _user ) internal { paybackDebt(_closeData.cdpId, manager.ilks(_closeData.cdpId), _closeData.daiAmount); // payback whole debt drawMaxCollateral(_closeData.cdpId, _closeData.joinAddr, _closeData.collAmount); // draw whole collateral uint daiSwaped = 0; uint dfsFee = 0; if (_closeData.toDai) { _exchangeData.srcAmount = _closeData.collAmount; (, daiSwaped) = _sell(_exchangeData); dfsFee = getFee(daiSwaped, _user); } else { dfsFee = getFee(_closeData.daiAmount, _user); _exchangeData.destAmount = (_closeData.daiAmount + _closeData.flFee + dfsFee); (, daiSwaped) = _buy(_exchangeData); } takeFee(dfsFee); address tokenAddr = getVaultCollAddr(_closeData.joinAddr); if (_closeData.toDai) { tokenAddr = DAI_ADDRESS; } require(getBalance(tokenAddr) >= _closeData.minAccepted, "Below min. number of eth specified"); transferFundsBackToPoolInternal(_closeData.reserve, _closeData.amount.add(_closeData.flFee)); sendLeftover(tokenAddr, DAI_ADDRESS, payable(_user)); } function drawMaxCollateral(uint _cdpId, address _joinAddr, uint _amount) internal returns (uint) { manager.frob(_cdpId, -toPositiveInt(_amount), 0); manager.flux(_cdpId, address(this), _amount); uint joinAmount = _amount; if (Join(_joinAddr).dec() != 18) { joinAmount = _amount / (10 ** (18 - Join(_joinAddr).dec())); } Join(_joinAddr).exit(address(this), joinAmount); if (_joinAddr == ETH_JOIN_ADDRESS) { Join(_joinAddr).gem().withdraw(joinAmount); // Weth -> Eth } return joinAmount; } function paybackDebt(uint _cdpId, bytes32 _ilk, uint _daiAmount) internal { address urn = manager.urns(_cdpId); daiJoin.dai().approve(DAI_JOIN_ADDRESS, _daiAmount); daiJoin.join(urn, _daiAmount); manager.frob(_cdpId, 0, normalizePaybackAmount(VAT_ADDRESS, urn, _ilk)); } function takeFee(uint _feeAmount) internal returns (uint) { ERC20(DAI_ADDRESS).transfer(WALLET_ID, _feeAmount); } function getFee(uint _amount, address _owner) internal view returns (uint feeAmount) { uint fee = SERVICE_FEE; if (Discount(DISCOUNT_ADDRESS).isCustomFeeSet(_owner)) { fee = Discount(DISCOUNT_ADDRESS).getCustomServiceFee(_owner); } feeAmount = (fee == 0) ? 0 : (_amount / fee); // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } } function getVaultCollAddr(address _joinAddr) internal view returns (address) { address tokenAddr = address(Join(_joinAddr).gem()); if (tokenAddr == WETH_ADDRESS) { return KYBER_ETH_ADDRESS; } return tokenAddr; } function getPrice(bytes32 _ilk) public view returns (uint256) { (, uint256 mat) = spotter.ilks(_ilk); (, , uint256 spot, , ) = vat.ilks(_ilk); return rmul(rmul(spot, spotter.par()), mat); } receive() external override(FlashLoanReceiverBase, SaverExchangeCore) payable {} } contract MCDCloseTaker is MCDSaverProxyHelper { address public constant SUBSCRIPTION_ADDRESS_NEW = 0xC45d4f6B6bf41b6EdAA58B01c4298B8d9078269a; address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); // solhint-disable-next-line const-name-snakecase Manager public constant manager = Manager(0x5ef30b9986345249bc32d8928B7ee64DE9435E39); address public constant SPOTTER_ADDRESS = 0x65C79fcB50Ca1594B025960e539eD7A9a6D434A3; address public constant VAT_ADDRESS = 0x35D1b3F3D7966A1DFe207aa4514C12a259A0492B; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; // solhint-disable-next-line const-name-snakecase DefisaverLogger public constant logger = DefisaverLogger(DEFISAVER_LOGGER); struct CloseData { uint cdpId; address joinAddr; uint collAmount; uint daiAmount; uint minAccepted; bool wholeDebt; bool toDai; } Vat public constant vat = Vat(VAT_ADDRESS); Spotter public constant spotter = Spotter(SPOTTER_ADDRESS); function closeWithLoan( SaverExchangeCore.ExchangeData memory _exchangeData, CloseData memory _closeData, address payable mcdCloseFlashLoan ) public payable { mcdCloseFlashLoan.transfer(msg.value); // 0x fee if (_closeData.wholeDebt) { _closeData.daiAmount = getAllDebt( VAT_ADDRESS, manager.urns(_closeData.cdpId), manager.urns(_closeData.cdpId), manager.ilks(_closeData.cdpId) ); (_closeData.collAmount, ) = getCdpInfo(manager, _closeData.cdpId, manager.ilks(_closeData.cdpId)); } manager.cdpAllow(_closeData.cdpId, mcdCloseFlashLoan, 1); (uint[8] memory numData, address[5] memory addrData, bytes memory callData) = _packData(_closeData, _exchangeData); bytes memory paramsData = abi.encode(numData, addrData, callData, address(this), _closeData.toDai); lendingPool.flashLoan(mcdCloseFlashLoan, DAI_ADDRESS, _closeData.daiAmount, paramsData); manager.cdpAllow(_closeData.cdpId, mcdCloseFlashLoan, 0); // If sub. to automatic protection unsubscribe unsubscribe(SUBSCRIPTION_ADDRESS_NEW, _closeData.cdpId); logger.Log(address(this), msg.sender, "MCDClose", abi.encode(_closeData.cdpId, _closeData.collAmount, _closeData.daiAmount, _closeData.toDai)); } /// @notice Gets the maximum amount of debt available to generate /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP function getMaxDebt(uint256 _cdpId, bytes32 _ilk) public view returns (uint256) { uint256 price = getPrice(_ilk); (, uint256 mat) = spotter.ilks(_ilk); (uint256 collateral, uint256 debt) = getCdpInfo(manager, _cdpId, _ilk); return sub(wdiv(wmul(collateral, price), mat), debt); } /// @notice Gets a price of the asset /// @param _ilk Ilk of the CDP function getPrice(bytes32 _ilk) public view returns (uint256) { (, uint256 mat) = spotter.ilks(_ilk); (, , uint256 spot, , ) = vat.ilks(_ilk); return rmul(rmul(spot, spotter.par()), mat); } function unsubscribe(address _subContract, uint _cdpId) internal { (, bool isSubscribed) = IMCDSubscriptions(_subContract).subscribersPos(_cdpId); if (isSubscribed) { IMCDSubscriptions(_subContract).unsubscribe(_cdpId); } } function _packData( CloseData memory _closeData, SaverExchangeCore.ExchangeData memory exchangeData ) internal pure returns (uint[8] memory numData, address[5] memory addrData, bytes memory callData) { numData = [ _closeData.cdpId, _closeData.collAmount, _closeData.daiAmount, _closeData.minAccepted, exchangeData.srcAmount, exchangeData.destAmount, exchangeData.minPrice, exchangeData.price0x ]; addrData = [ exchangeData.srcAddr, exchangeData.destAddr, exchangeData.exchangeAddr, exchangeData.wrapper, _closeData.joinAddr ]; callData = exchangeData.callData; } } contract MCDCreateFlashLoan is SaverExchangeCore, AdminAuth, FlashLoanReceiverBase { address public constant CREATE_PROXY_ACTIONS = 0x6d0984E80a86f26c0dd564ca0CF74a8E9Da03305; uint public constant SERVICE_FEE = 400; // 0.25% Fee address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); address public constant ETH_JOIN_ADDRESS = 0x2F0b23f53734252Bda2277357e97e1517d6B042A; address public constant DAI_JOIN_ADDRESS = 0x9759A6Ac90977b93B58547b4A71c78317f391A28; address public constant JUG_ADDRESS = 0x19c0976f590D67707E62397C87829d896Dc0f1F1; address public constant MANAGER_ADDRESS = 0x5ef30b9986345249bc32d8928B7ee64DE9435E39; constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public {} function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { //check the contract has the specified balance require(_amount <= getBalanceInternal(address(this), _reserve), "Invalid balance for the contract"); ( uint[6] memory numData, address[5] memory addrData, bytes memory callData, address proxy ) = abi.decode(_params, (uint256[6],address[5],bytes,address)); ExchangeData memory exchangeData = ExchangeData({ srcAddr: addrData[0], destAddr: addrData[1], srcAmount: numData[2], destAmount: numData[3], minPrice: numData[4], wrapper: addrData[3], exchangeAddr: addrData[2], callData: callData, price0x: numData[5] }); openAndLeverage(numData[0], numData[1] + _fee, addrData[4], proxy, exchangeData); transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } } function openAndLeverage( uint _collAmount, uint _daiAmountAndFee, address _joinAddr, address _proxy, ExchangeData memory _exchangeData ) public { uint dfsFee = getFee(_exchangeData.srcAmount, DSProxy(payable(_proxy)).owner()); _exchangeData.srcAmount = (_exchangeData.srcAmount - dfsFee); (, uint256 collSwaped) = _sell(_exchangeData); bytes32 ilk = Join(_joinAddr).ilk(); if (_joinAddr == ETH_JOIN_ADDRESS) { MCDCreateProxyActions(CREATE_PROXY_ACTIONS).openLockETHAndDraw{value: address(this).balance}( MANAGER_ADDRESS, JUG_ADDRESS, ETH_JOIN_ADDRESS, DAI_JOIN_ADDRESS, ilk, _daiAmountAndFee, _proxy ); } else { ERC20(address(Join(_joinAddr).gem())).safeApprove(CREATE_PROXY_ACTIONS, 0); ERC20(address(Join(_joinAddr).gem())).safeApprove(CREATE_PROXY_ACTIONS, uint256(-1)); MCDCreateProxyActions(CREATE_PROXY_ACTIONS).openLockGemAndDraw( MANAGER_ADDRESS, JUG_ADDRESS, _joinAddr, DAI_JOIN_ADDRESS, ilk, (_collAmount + collSwaped), _daiAmountAndFee, true, _proxy ); } } function getFee(uint _amount, address _owner) internal returns (uint feeAmount) { uint fee = SERVICE_FEE; if (Discount(DISCOUNT_ADDRESS).isCustomFeeSet(_owner)) { fee = Discount(DISCOUNT_ADDRESS).getCustomServiceFee(_owner); } feeAmount = (fee == 0) ? 0 : (_amount / fee); // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } ERC20(DAI_ADDRESS).transfer(WALLET_ID, feeAmount); } receive() external override(FlashLoanReceiverBase, SaverExchangeCore) payable {} } contract MCDSaverProxy is SaverExchangeCore, MCDSaverProxyHelper { uint public constant MANUAL_SERVICE_FEE = 400; // 0.25% Fee uint public constant AUTOMATIC_SERVICE_FEE = 333; // 0.3% Fee bytes32 public constant ETH_ILK = 0x4554482d41000000000000000000000000000000000000000000000000000000; address public constant MANAGER_ADDRESS = 0x5ef30b9986345249bc32d8928B7ee64DE9435E39; address public constant VAT_ADDRESS = 0x35D1b3F3D7966A1DFe207aa4514C12a259A0492B; address public constant SPOTTER_ADDRESS = 0x65C79fcB50Ca1594B025960e539eD7A9a6D434A3; address public constant DAI_JOIN_ADDRESS = 0x9759A6Ac90977b93B58547b4A71c78317f391A28; address public constant JUG_ADDRESS = 0x19c0976f590D67707E62397C87829d896Dc0f1F1; address public constant ETH_JOIN_ADDRESS = 0x2F0b23f53734252Bda2277357e97e1517d6B042A; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; address public constant BOT_REGISTRY_ADDRESS = 0x637726f8b08a7ABE3aE3aCaB01A80E2d8ddeF77B; Manager public constant manager = Manager(MANAGER_ADDRESS); Vat public constant vat = Vat(VAT_ADDRESS); DaiJoin public constant daiJoin = DaiJoin(DAI_JOIN_ADDRESS); Spotter public constant spotter = Spotter(SPOTTER_ADDRESS); DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); /// @notice Repay - draws collateral, converts to Dai and repays the debt /// @dev Must be called by the DSProxy contract that owns the CDP function repay( SaverExchangeCore.ExchangeData memory _exchangeData, uint _cdpId, uint _gasCost, address _joinAddr ) public payable { address owner = getOwner(manager, _cdpId); bytes32 ilk = manager.ilks(_cdpId); drawCollateral(_cdpId, _joinAddr, _exchangeData.srcAmount); (, uint daiAmount) = _sell(_exchangeData); uint daiAfterFee = sub(daiAmount, getFee(daiAmount, _gasCost, owner)); paybackDebt(_cdpId, ilk, daiAfterFee, owner); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } logger.Log(address(this), msg.sender, "MCDRepay", abi.encode(_cdpId, owner, _exchangeData.srcAmount, daiAmount)); } /// @notice Boost - draws Dai, converts to collateral and adds to CDP /// @dev Must be called by the DSProxy contract that owns the CDP function boost( SaverExchangeCore.ExchangeData memory _exchangeData, uint _cdpId, uint _gasCost, address _joinAddr ) public payable { address owner = getOwner(manager, _cdpId); bytes32 ilk = manager.ilks(_cdpId); uint daiDrawn = drawDai(_cdpId, ilk, _exchangeData.srcAmount); uint daiAfterFee = sub(daiDrawn, getFee(daiDrawn, _gasCost, owner)); _exchangeData.srcAmount = daiAfterFee; (, uint swapedColl) = _sell(_exchangeData); addCollateral(_cdpId, _joinAddr, swapedColl); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } logger.Log(address(this), msg.sender, "MCDBoost", abi.encode(_cdpId, owner, _exchangeData.srcAmount, swapedColl)); } /// @notice Draws Dai from the CDP /// @dev If _daiAmount is bigger than max available we'll draw max /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP /// @param _daiAmount Amount of Dai to draw function drawDai(uint _cdpId, bytes32 _ilk, uint _daiAmount) internal returns (uint) { uint rate = Jug(JUG_ADDRESS).drip(_ilk); uint daiVatBalance = vat.dai(manager.urns(_cdpId)); uint maxAmount = getMaxDebt(_cdpId, _ilk); if (_daiAmount >= maxAmount) { _daiAmount = sub(maxAmount, 1); } manager.frob(_cdpId, int(0), normalizeDrawAmount(_daiAmount, rate, daiVatBalance)); manager.move(_cdpId, address(this), toRad(_daiAmount)); if (vat.can(address(this), address(DAI_JOIN_ADDRESS)) == 0) { vat.hope(DAI_JOIN_ADDRESS); } DaiJoin(DAI_JOIN_ADDRESS).exit(address(this), _daiAmount); return _daiAmount; } /// @notice Adds collateral to the CDP /// @param _cdpId Id of the CDP /// @param _joinAddr Address of the join contract for the CDP collateral /// @param _amount Amount of collateral to add function addCollateral(uint _cdpId, address _joinAddr, uint _amount) internal { int convertAmount = 0; if (_joinAddr == ETH_JOIN_ADDRESS) { Join(_joinAddr).gem().deposit{value: _amount}(); convertAmount = toPositiveInt(_amount); } else { convertAmount = toPositiveInt(convertTo18(_joinAddr, _amount)); } ERC20(address(Join(_joinAddr).gem())).safeApprove(_joinAddr, 0); ERC20(address(Join(_joinAddr).gem())).safeApprove(_joinAddr, _amount); Join(_joinAddr).join(address(this), _amount); vat.frob( manager.ilks(_cdpId), manager.urns(_cdpId), address(this), address(this), convertAmount, 0 ); } /// @notice Draws collateral and returns it to DSProxy /// @dev If _amount is bigger than max available we'll draw max /// @param _cdpId Id of the CDP /// @param _joinAddr Address of the join contract for the CDP collateral /// @param _amount Amount of collateral to draw function drawCollateral(uint _cdpId, address _joinAddr, uint _amount) internal returns (uint) { uint frobAmount = _amount; if (Join(_joinAddr).dec() != 18) { frobAmount = _amount * (10 ** (18 - Join(_joinAddr).dec())); } manager.frob(_cdpId, -toPositiveInt(frobAmount), 0); manager.flux(_cdpId, address(this), frobAmount); Join(_joinAddr).exit(address(this), _amount); if (_joinAddr == ETH_JOIN_ADDRESS) { Join(_joinAddr).gem().withdraw(_amount); // Weth -> Eth } return _amount; } /// @notice Paybacks Dai debt /// @dev If the _daiAmount is bigger than the whole debt, returns extra Dai /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP /// @param _daiAmount Amount of Dai to payback /// @param _owner Address that owns the DSProxy that owns the CDP function paybackDebt(uint _cdpId, bytes32 _ilk, uint _daiAmount, address _owner) internal { address urn = manager.urns(_cdpId); uint wholeDebt = getAllDebt(VAT_ADDRESS, urn, urn, _ilk); if (_daiAmount > wholeDebt) { ERC20(DAI_ADDRESS).transfer(_owner, sub(_daiAmount, wholeDebt)); _daiAmount = wholeDebt; } if (ERC20(DAI_ADDRESS).allowance(address(this), DAI_JOIN_ADDRESS) == 0) { ERC20(DAI_ADDRESS).approve(DAI_JOIN_ADDRESS, uint(-1)); } daiJoin.join(urn, _daiAmount); manager.frob(_cdpId, 0, normalizePaybackAmount(VAT_ADDRESS, urn, _ilk)); } /// @notice Calculates the fee amount /// @param _amount Dai amount that is converted /// @param _gasCost Used for Monitor, estimated gas cost of tx /// @param _owner The address that controlls the DSProxy that owns the CDP function getFee(uint _amount, uint _gasCost, address _owner) internal returns (uint feeAmount) { uint fee = MANUAL_SERVICE_FEE; if (BotRegistry(BOT_REGISTRY_ADDRESS).botList(tx.origin)) { fee = AUTOMATIC_SERVICE_FEE; } if (Discount(DISCOUNT_ADDRESS).isCustomFeeSet(_owner)) { fee = Discount(DISCOUNT_ADDRESS).getCustomServiceFee(_owner); } feeAmount = (fee == 0) ? 0 : (_amount / fee); if (_gasCost != 0) { uint ethDaiPrice = getPrice(ETH_ILK); _gasCost = rmul(_gasCost, ethDaiPrice); feeAmount = add(feeAmount, _gasCost); } // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } ERC20(DAI_ADDRESS).transfer(WALLET_ID, feeAmount); } /// @notice Gets the maximum amount of collateral available to draw /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP /// @param _joinAddr Joind address of collateral /// @dev Substracts 10 wei to aviod rounding error later on function getMaxCollateral(uint _cdpId, bytes32 _ilk, address _joinAddr) public view returns (uint) { uint price = getPrice(_ilk); (uint collateral, uint debt) = getCdpInfo(manager, _cdpId, _ilk); (, uint mat) = Spotter(SPOTTER_ADDRESS).ilks(_ilk); uint maxCollateral = sub(sub(collateral, (div(mul(mat, debt), price))), 10); uint normalizeMaxCollateral = maxCollateral; if (Join(_joinAddr).dec() != 18) { normalizeMaxCollateral = maxCollateral / (10 ** (18 - Join(_joinAddr).dec())); } return normalizeMaxCollateral; } /// @notice Gets the maximum amount of debt available to generate /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP /// @dev Substracts 10 wei to aviod rounding error later on function getMaxDebt(uint _cdpId, bytes32 _ilk) public virtual view returns (uint) { uint price = getPrice(_ilk); (, uint mat) = spotter.ilks(_ilk); (uint collateral, uint debt) = getCdpInfo(manager, _cdpId, _ilk); return sub(sub(div(mul(collateral, price), mat), debt), 10); } /// @notice Gets a price of the asset /// @param _ilk Ilk of the CDP function getPrice(bytes32 _ilk) public view returns (uint) { (, uint mat) = spotter.ilks(_ilk); (,,uint spot,,) = vat.ilks(_ilk); return rmul(rmul(spot, spotter.par()), mat); } /// @notice Gets CDP ratio /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP function getRatio(uint _cdpId, bytes32 _ilk) public view returns (uint) { uint price = getPrice( _ilk); (uint collateral, uint debt) = getCdpInfo(manager, _cdpId, _ilk); if (debt == 0) return 0; return rdiv(wmul(collateral, price), debt); } /// @notice Gets CDP info (collateral, debt, price, ilk) /// @param _cdpId Id of the CDP function getCdpDetailedInfo(uint _cdpId) public view returns (uint collateral, uint debt, uint price, bytes32 ilk) { address urn = manager.urns(_cdpId); ilk = manager.ilks(_cdpId); (collateral, debt) = vat.urns(ilk, urn); (,uint rate,,,) = vat.ilks(ilk); debt = rmul(debt, rate); price = getPrice(ilk); } } contract MCDSaverTaker is MCDSaverProxy, GasBurner { address payable public constant MCD_SAVER_FLASH_LOAN = 0x28e444b53a9e7E3F6fFe50E93b18dCce7838551F; address public constant AAVE_POOL_CORE = 0x3dfd23A6c5E8BbcFc9581d2E864a68feb6a076d3; ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); function boostWithLoan( SaverExchangeCore.ExchangeData memory _exchangeData, uint _cdpId, uint _gasCost, address _joinAddr ) public payable burnGas(25) { uint256 maxDebt = getMaxDebt(_cdpId, manager.ilks(_cdpId)); if (maxDebt >= _exchangeData.srcAmount) { boost(_exchangeData, _cdpId, _gasCost, _joinAddr); return; } MCD_SAVER_FLASH_LOAN.transfer(msg.value); // 0x fee uint256 loanAmount = sub(_exchangeData.srcAmount, maxDebt); uint maxLiq = getAvailableLiquidity(DAI_JOIN_ADDRESS); loanAmount = loanAmount > maxLiq ? maxLiq : loanAmount; manager.cdpAllow(_cdpId, MCD_SAVER_FLASH_LOAN, 1); bytes memory paramsData = abi.encode(packExchangeData(_exchangeData), _cdpId, _gasCost, _joinAddr, false); lendingPool.flashLoan(MCD_SAVER_FLASH_LOAN, DAI_ADDRESS, loanAmount, paramsData); manager.cdpAllow(_cdpId, MCD_SAVER_FLASH_LOAN, 0); } function repayWithLoan( SaverExchangeCore.ExchangeData memory _exchangeData, uint _cdpId, uint _gasCost, address _joinAddr ) public payable burnGas(25) { uint256 maxColl = getMaxCollateral(_cdpId, manager.ilks(_cdpId), _joinAddr); if (maxColl >= _exchangeData.srcAmount) { repay(_exchangeData, _cdpId, _gasCost, _joinAddr); return; } MCD_SAVER_FLASH_LOAN.transfer(msg.value); // 0x fee uint256 loanAmount = sub(_exchangeData.srcAmount, maxColl); uint maxLiq = getAvailableLiquidity(_joinAddr); loanAmount = loanAmount > maxLiq ? maxLiq : loanAmount; manager.cdpAllow(_cdpId, MCD_SAVER_FLASH_LOAN, 1); bytes memory paramsData = abi.encode(packExchangeData(_exchangeData), _cdpId, _gasCost, _joinAddr, true); lendingPool.flashLoan(MCD_SAVER_FLASH_LOAN, getAaveCollAddr(_joinAddr), loanAmount, paramsData); manager.cdpAllow(_cdpId, MCD_SAVER_FLASH_LOAN, 0); } /// @notice Gets the maximum amount of debt available to generate /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP function getMaxDebt(uint256 _cdpId, bytes32 _ilk) public override view returns (uint256) { uint256 price = getPrice(_ilk); (, uint256 mat) = spotter.ilks(_ilk); (uint256 collateral, uint256 debt) = getCdpInfo(manager, _cdpId, _ilk); return sub(wdiv(wmul(collateral, price), mat), debt); } function getAaveCollAddr(address _joinAddr) internal view returns (address) { if (_joinAddr == 0x2F0b23f53734252Bda2277357e97e1517d6B042A || _joinAddr == 0x775787933e92b709f2a3C70aa87999696e74A9F8) { return KYBER_ETH_ADDRESS; } else if (_joinAddr == DAI_JOIN_ADDRESS) { return DAI_ADDRESS; } else { return getCollateralAddr(_joinAddr); } } function getAvailableLiquidity(address _joinAddr) internal view returns (uint liquidity) { address tokenAddr = getAaveCollAddr(_joinAddr); if (tokenAddr == KYBER_ETH_ADDRESS) { liquidity = AAVE_POOL_CORE.balance; } else { liquidity = ERC20(tokenAddr).balanceOf(AAVE_POOL_CORE); } } function _packData( uint _cdpId, uint _gasCost, address _joinAddr, SaverExchangeCore.ExchangeData memory exchangeData ) internal pure returns (uint[6] memory numData, address[5] memory addrData, bytes memory callData) { numData = [ exchangeData.srcAmount, exchangeData.destAmount, exchangeData.minPrice, exchangeData.price0x, _cdpId, _gasCost ]; addrData = [ exchangeData.srcAddr, exchangeData.destAddr, exchangeData.exchangeAddr, exchangeData.wrapper, _joinAddr ]; callData = exchangeData.callData; } } contract SavingsProxy is DSRSavingsProtocol, CompoundSavingsProtocol { address public constant ADAI_ADDRESS = 0xfC1E690f61EFd961294b3e1Ce3313fBD8aa4f85d; address public constant SAVINGS_DYDX_ADDRESS = 0x03b1565e070df392e48e7a8e01798C4B00E534A5; address public constant SAVINGS_AAVE_ADDRESS = 0x535B9035E9bA8D7efe0FeAEac885fb65b303E37C; address public constant NEW_IDAI_ADDRESS = 0x493C57C4763932315A328269E1ADaD09653B9081; address public constant COMP_ADDRESS = 0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B; address public constant SAVINGS_LOGGER_ADDRESS = 0x89b3635BD2bAD145C6f92E82C9e83f06D5654984; address public constant SOLO_MARGIN_ADDRESS = 0x1E0447b19BB6EcFdAe1e4AE1694b0C3659614e4e; enum SavingsProtocol {Compound, Dydx, Fulcrum, Dsr, Aave} function deposit(SavingsProtocol _protocol, uint256 _amount) public { if (_protocol == SavingsProtocol.Dsr) { dsrDeposit(_amount, true); } else if (_protocol == SavingsProtocol.Compound) { compDeposit(msg.sender, _amount); } else { _deposit(_protocol, _amount, true); } SavingsLogger(SAVINGS_LOGGER_ADDRESS).logDeposit(msg.sender, uint8(_protocol), _amount); } function withdraw(SavingsProtocol _protocol, uint256 _amount) public { if (_protocol == SavingsProtocol.Dsr) { dsrWithdraw(_amount, true); } else if (_protocol == SavingsProtocol.Compound) { compWithdraw(msg.sender, _amount); } else { _withdraw(_protocol, _amount, true); } SavingsLogger(SAVINGS_LOGGER_ADDRESS).logWithdraw(msg.sender, uint8(_protocol), _amount); } function swap(SavingsProtocol _from, SavingsProtocol _to, uint256 _amount) public { if (_from == SavingsProtocol.Dsr) { dsrWithdraw(_amount, false); } else if (_from == SavingsProtocol.Compound) { compWithdraw(msg.sender, _amount); } else { _withdraw(_from, _amount, false); } // possible to withdraw 1-2 wei less than actual amount due to division precision // so we deposit all amount on DSProxy uint256 amountToDeposit = ERC20(DAI_ADDRESS).balanceOf(address(this)); if (_to == SavingsProtocol.Dsr) { dsrDeposit(amountToDeposit, false); } else if (_from == SavingsProtocol.Compound) { compDeposit(msg.sender, _amount); } else { _deposit(_to, amountToDeposit, false); } SavingsLogger(SAVINGS_LOGGER_ADDRESS).logSwap( msg.sender, uint8(_from), uint8(_to), _amount ); } function withdrawDai() public { ERC20(DAI_ADDRESS).transfer(msg.sender, ERC20(DAI_ADDRESS).balanceOf(address(this))); } function claimComp() public { ComptrollerInterface(COMP_ADDRESS).claimComp(address(this)); } function getAddress(SavingsProtocol _protocol) public pure returns (address) { if (_protocol == SavingsProtocol.Dydx) { return SAVINGS_DYDX_ADDRESS; } if (_protocol == SavingsProtocol.Aave) { return SAVINGS_AAVE_ADDRESS; } } function _deposit(SavingsProtocol _protocol, uint256 _amount, bool _fromUser) internal { if (_fromUser) { ERC20(DAI_ADDRESS).transferFrom(msg.sender, address(this), _amount); } approveDeposit(_protocol); ProtocolInterface(getAddress(_protocol)).deposit(address(this), _amount); endAction(_protocol); } function _withdraw(SavingsProtocol _protocol, uint256 _amount, bool _toUser) public { approveWithdraw(_protocol); ProtocolInterface(getAddress(_protocol)).withdraw(address(this), _amount); endAction(_protocol); if (_toUser) { withdrawDai(); } } function endAction(SavingsProtocol _protocol) internal { if (_protocol == SavingsProtocol.Dydx) { setDydxOperator(false); } } function approveDeposit(SavingsProtocol _protocol) internal { if (_protocol == SavingsProtocol.Compound || _protocol == SavingsProtocol.Fulcrum || _protocol == SavingsProtocol.Aave) { ERC20(DAI_ADDRESS).approve(getAddress(_protocol), uint256(-1)); } if (_protocol == SavingsProtocol.Dydx) { ERC20(DAI_ADDRESS).approve(SOLO_MARGIN_ADDRESS, uint256(-1)); setDydxOperator(true); } } function approveWithdraw(SavingsProtocol _protocol) internal { if (_protocol == SavingsProtocol.Compound) { ERC20(NEW_CDAI_ADDRESS).approve(getAddress(_protocol), uint256(-1)); } if (_protocol == SavingsProtocol.Dydx) { setDydxOperator(true); } if (_protocol == SavingsProtocol.Fulcrum) { ERC20(NEW_IDAI_ADDRESS).approve(getAddress(_protocol), uint256(-1)); } if (_protocol == SavingsProtocol.Aave) { ERC20(ADAI_ADDRESS).approve(getAddress(_protocol), uint256(-1)); } } function setDydxOperator(bool _trusted) internal { ISoloMargin.OperatorArg[] memory operatorArgs = new ISoloMargin.OperatorArg[](1); operatorArgs[0] = ISoloMargin.OperatorArg({ operator: getAddress(SavingsProtocol.Dydx), trusted: _trusted }); ISoloMargin(SOLO_MARGIN_ADDRESS).setOperators(operatorArgs); } } contract LoanShifterReceiver is SaverExchangeCore, FlashLoanReceiverBase, AdminAuth { ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; ShifterRegistry public constant shifterRegistry = ShifterRegistry(0x597C52281b31B9d949a9D8fEbA08F7A2530a965e); struct ParamData { bytes proxyData1; bytes proxyData2; address proxy; address debtAddr; uint8 protocol1; uint8 protocol2; uint8 swapType; } constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public {} function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { // Format the call data for DSProxy (ParamData memory paramData, ExchangeData memory exchangeData) = packFunctionCall(_amount, _fee, _params); address protocolAddr1 = shifterRegistry.getAddr(getNameByProtocol(paramData.protocol1)); address protocolAddr2 = shifterRegistry.getAddr(getNameByProtocol(paramData.protocol2)); // Send Flash loan amount to DSProxy sendToProxy(payable(paramData.proxy), _reserve, _amount); // Execute the Close/Change debt operation DSProxyInterface(paramData.proxy).execute(protocolAddr1, paramData.proxyData1); if (paramData.swapType == 1) { // COLL_SWAP exchangeData.srcAmount = getBalance(exchangeData.srcAddr); (, uint amount) = _sell(exchangeData); sendToProxy(payable(paramData.proxy), exchangeData.destAddr, amount); } else if (paramData.swapType == 2) { // DEBT_SWAP exchangeData.destAmount = (_amount + _fee); _buy(exchangeData); // Send extra to DSProxy sendToProxy(payable(paramData.proxy), exchangeData.srcAddr, ERC20(exchangeData.srcAddr).balanceOf(address(this))); } else { // NO_SWAP just send tokens to proxy sendToProxy(payable(paramData.proxy), exchangeData.srcAddr, getBalance(exchangeData.srcAddr)); } // Execute the Open operation DSProxyInterface(paramData.proxy).execute(protocolAddr2, paramData.proxyData2); // Repay FL transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } } function packFunctionCall(uint _amount, uint _fee, bytes memory _params) internal pure returns (ParamData memory paramData, ExchangeData memory exchangeData) { ( uint[8] memory numData, // collAmount, debtAmount, id1, id2, srcAmount, destAmount, minPrice, price0x address[8] memory addrData, // addrLoan1, addrLoan2, debtAddr1, debtAddr2, srcAddr, destAddr, exchangeAddr, wrapper uint8[3] memory enumData, // fromProtocol, toProtocol, swapType bytes memory callData, address proxy ) = abi.decode(_params, (uint256[8],address[8],uint8[3],bytes,address)); bytes memory proxyData1; bytes memory proxyData2; uint openDebtAmount = (_amount + _fee); if (enumData[0] == 0) { // MAKER FROM proxyData1 = abi.encodeWithSignature("close(uint256,address,uint256,uint256)", numData[2], addrData[0], _amount, numData[0]); } else if(enumData[0] == 1) { // COMPOUND FROM if (enumData[2] == 2) { // DEBT_SWAP proxyData1 = abi.encodeWithSignature("changeDebt(address,address,uint256,uint256)", addrData[2], addrData[3], (_amount + _fee), numData[4]); } else { proxyData1 = abi.encodeWithSignature("close(address,address,uint256,uint256)", addrData[0], addrData[2], numData[0], numData[1]); } } if (enumData[1] == 0) { // MAKER TO proxyData2 = abi.encodeWithSignature("open(uint256,address,uint256)", numData[3], addrData[1], openDebtAmount); } else if(enumData[1] == 1) { // COMPOUND TO if (enumData[2] == 2) { // DEBT_SWAP proxyData2 = abi.encodeWithSignature("repayAll(address)", addrData[3]); } else { proxyData2 = abi.encodeWithSignature("open(address,address,uint256)", addrData[1], addrData[3], openDebtAmount); } } paramData = ParamData({ proxyData1: proxyData1, proxyData2: proxyData2, proxy: proxy, debtAddr: addrData[2], protocol1: enumData[0], protocol2: enumData[1], swapType: enumData[2] }); exchangeData = SaverExchangeCore.ExchangeData({ srcAddr: addrData[4], destAddr: addrData[5], srcAmount: numData[4], destAmount: numData[5], minPrice: numData[6], wrapper: addrData[7], exchangeAddr: addrData[6], callData: callData, price0x: numData[7] }); } function sendToProxy(address payable _proxy, address _reserve, uint _amount) internal { if (_reserve != ETH_ADDRESS) { ERC20(_reserve).safeTransfer(_proxy, _amount); } _proxy.transfer(address(this).balance); } function getNameByProtocol(uint8 _proto) internal pure returns (string memory) { if (_proto == 0) { return "MCD_SHIFTER"; } else if (_proto == 1) { return "COMP_SHIFTER"; } } receive() external override(FlashLoanReceiverBase, SaverExchangeCore) payable {} } contract CompShifter is CompoundSaverHelper { address public constant COMPTROLLER_ADDR = 0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B; function getLoanAmount(uint _cdpId, address _joinAddr) public returns(uint loanAmount) { return getWholeDebt(_cdpId, _joinAddr); } function getWholeDebt(uint _cdpId, address _joinAddr) public returns(uint loanAmount) { CTokenInterface(_joinAddr).accrueInterest(); return CTokenInterface(_joinAddr).borrowBalanceCurrent(msg.sender); } function close( address _cCollAddr, address _cBorrowAddr, uint _collAmount, uint _debtAmount ) public { address collAddr = getUnderlyingAddr(_cCollAddr); // payback debt paybackDebt(_debtAmount, _cBorrowAddr, getUnderlyingAddr(_cBorrowAddr), tx.origin); // draw coll if (CTokenInterface(_cBorrowAddr).borrowBalanceCurrent(address(this)) == 0) { uint cTokenBalance = CTokenInterface(_cCollAddr).balanceOf(address(this)); require(CTokenInterface(_cCollAddr).redeem(cTokenBalance) == 0); } else { require(CTokenInterface(_cCollAddr).redeemUnderlying(_collAmount) == 0); } // Send back money to repay FL if (collAddr == ETH_ADDRESS) { msg.sender.transfer(address(this).balance); } else { ERC20(collAddr).transfer(msg.sender, ERC20(collAddr).balanceOf(address(this))); } } function changeDebt( address _cBorrowAddrOld, address _cBorrowAddrNew, uint _debtAmountOld, uint _debtAmountNew ) public { address borrowAddrNew = getUnderlyingAddr(_cBorrowAddrNew); // payback debt in one token paybackDebt(_debtAmountOld, _cBorrowAddrOld, getUnderlyingAddr(_cBorrowAddrOld), tx.origin); // draw debt in another one borrowCompound(_cBorrowAddrNew, _debtAmountNew); // Send back money to repay FL if (borrowAddrNew == ETH_ADDRESS) { msg.sender.transfer(address(this).balance); } else { ERC20(borrowAddrNew).transfer(msg.sender, ERC20(borrowAddrNew).balanceOf(address(this))); } } function open( address _cCollAddr, address _cBorrowAddr, uint _debtAmount ) public { address collAddr = getUnderlyingAddr(_cCollAddr); address borrowAddr = getUnderlyingAddr(_cBorrowAddr); uint collAmount = 0; if (collAddr == ETH_ADDRESS) { collAmount = address(this).balance; } else { collAmount = ERC20(collAddr).balanceOf(address(this)); } depositCompound(collAddr, _cCollAddr, collAmount); // draw debt borrowCompound(_cBorrowAddr, _debtAmount); // Send back money to repay FL if (borrowAddr == ETH_ADDRESS) { msg.sender.transfer(address(this).balance); } else { ERC20(borrowAddr).transfer(msg.sender, ERC20(borrowAddr).balanceOf(address(this))); } } function repayAll(address _cTokenAddr) public { address tokenAddr = getUnderlyingAddr(_cTokenAddr); uint amount = ERC20(tokenAddr).balanceOf(address(this)); if (amount != 0) { paybackDebt(amount, _cTokenAddr, tokenAddr, tx.origin); } } function depositCompound(address _tokenAddr, address _cTokenAddr, uint _amount) internal { approveCToken(_tokenAddr, _cTokenAddr); enterMarket(_cTokenAddr); if (_tokenAddr != ETH_ADDRESS) { require(CTokenInterface(_cTokenAddr).mint(_amount) == 0, "mint error"); } else { CEtherInterface(_cTokenAddr).mint{value: _amount}(); } } function borrowCompound(address _cTokenAddr, uint _amount) internal { enterMarket(_cTokenAddr); require(CTokenInterface(_cTokenAddr).borrow(_amount) == 0); } function enterMarket(address _cTokenAddr) public { address[] memory markets = new address[](1); markets[0] = _cTokenAddr; ComptrollerInterface(COMPTROLLER_ADDR).enterMarkets(markets); } } contract McdShifter is MCDSaverProxy { address public constant OPEN_PROXY_ACTIONS = 0x6d0984E80a86f26c0dd564ca0CF74a8E9Da03305; function getLoanAmount(uint _cdpId, address _joinAddr) public view virtual returns(uint loanAmount) { bytes32 ilk = manager.ilks(_cdpId); (, uint rate,,,) = vat.ilks(ilk); (, uint art) = vat.urns(ilk, manager.urns(_cdpId)); uint dai = vat.dai(manager.urns(_cdpId)); uint rad = sub(mul(art, rate), dai); loanAmount = rad / RAY; loanAmount = mul(loanAmount, RAY) < rad ? loanAmount + 1 : loanAmount; } function close( uint _cdpId, address _joinAddr, uint _loanAmount, uint _collateral ) public { address owner = getOwner(manager, _cdpId); bytes32 ilk = manager.ilks(_cdpId); (uint maxColl, ) = getCdpInfo(manager, _cdpId, ilk); // repay dai debt cdp paybackDebt(_cdpId, ilk, _loanAmount, owner); maxColl = _collateral > maxColl ? maxColl : _collateral; // withdraw collateral from cdp drawMaxCollateral(_cdpId, _joinAddr, maxColl); // send back to msg.sender if (_joinAddr == ETH_JOIN_ADDRESS) { msg.sender.transfer(address(this).balance); } else { ERC20 collToken = ERC20(getCollateralAddr(_joinAddr)); collToken.transfer(msg.sender, collToken.balanceOf(address(this))); } } function open( uint _cdpId, address _joinAddr, uint _debtAmount ) public { uint collAmount = 0; if (_joinAddr == ETH_JOIN_ADDRESS) { collAmount = address(this).balance; } else { collAmount = ERC20(address(Join(_joinAddr).gem())).balanceOf(address(this)); } if (_cdpId == 0) { openAndWithdraw(collAmount, _debtAmount, address(this), _joinAddr); } else { // add collateral addCollateral(_cdpId, _joinAddr, collAmount); // draw debt drawDai(_cdpId, manager.ilks(_cdpId), _debtAmount); } // transfer to repay FL ERC20(DAI_ADDRESS).transfer(msg.sender, ERC20(DAI_ADDRESS).balanceOf(address(this))); if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } } function openAndWithdraw(uint _collAmount, uint _debtAmount, address _proxy, address _joinAddrTo) internal { bytes32 ilk = Join(_joinAddrTo).ilk(); if (_joinAddrTo == ETH_JOIN_ADDRESS) { MCDCreateProxyActions(OPEN_PROXY_ACTIONS).openLockETHAndDraw{value: address(this).balance}( address(manager), JUG_ADDRESS, ETH_JOIN_ADDRESS, DAI_JOIN_ADDRESS, ilk, _debtAmount, _proxy ); } else { ERC20(getCollateralAddr(_joinAddrTo)).approve(OPEN_PROXY_ACTIONS, uint256(-1)); MCDCreateProxyActions(OPEN_PROXY_ACTIONS).openLockGemAndDraw( address(manager), JUG_ADDRESS, _joinAddrTo, DAI_JOIN_ADDRESS, ilk, _collAmount, _debtAmount, true, _proxy ); } } function drawMaxCollateral(uint _cdpId, address _joinAddr, uint _amount) internal returns (uint) { manager.frob(_cdpId, -toPositiveInt(_amount), 0); manager.flux(_cdpId, address(this), _amount); uint joinAmount = _amount; if (Join(_joinAddr).dec() != 18) { joinAmount = _amount / (10 ** (18 - Join(_joinAddr).dec())); } Join(_joinAddr).exit(address(this), joinAmount); if (_joinAddr == ETH_JOIN_ADDRESS) { Join(_joinAddr).gem().withdraw(joinAmount); // Weth -> Eth } return joinAmount; } } contract AaveSaverProxy is GasBurner, SaverExchangeCore, AaveHelper { address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; uint public constant VARIABLE_RATE = 2; function repay(ExchangeData memory _data, uint _gasCost) public payable burnGas(20) { address lendingPoolCore = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); address payable user = payable(getUserAddress()); uint256 maxCollateral = getMaxCollateral(_data.srcAddr, address(this)); // don't swap more than maxCollateral _data.srcAmount = _data.srcAmount > maxCollateral ? maxCollateral : _data.srcAmount; // redeem collateral address aTokenCollateral = ILendingPool(lendingPoolCore).getReserveATokenAddress(_data.srcAddr); IAToken(aTokenCollateral).redeem(_data.srcAmount); uint256 destAmount = _data.srcAmount; if (_data.srcAddr != _data.destAddr) { // swap (, destAmount) = _sell(_data); destAmount -= getFee(destAmount, user, _gasCost, _data.destAddr); } else { destAmount -= getGasCost(destAmount, user, _gasCost, _data.destAddr); } // payback if (_data.destAddr == ETH_ADDR) { ILendingPool(lendingPool).repay{value: destAmount}(_data.destAddr, destAmount, payable(address(this))); } else { approveToken(_data.destAddr, lendingPoolCore); ILendingPool(lendingPool).repay(_data.destAddr, destAmount, payable(address(this))); } // first return 0x fee to msg.sender as it is the address that actually sent 0x fee sendContractBalance(ETH_ADDR, tx.origin, min(address(this).balance, msg.value)); // send all leftovers from dest addr to proxy owner sendFullContractBalance(_data.destAddr, user); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "AaveRepay", abi.encode(_data.srcAddr, _data.destAddr, _data.srcAmount, destAmount)); } function boost(ExchangeData memory _data, uint _gasCost) public payable burnGas(20) { address lendingPoolCore = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); (,,,,,,,,,bool collateralEnabled) = ILendingPool(lendingPool).getUserReserveData(_data.destAddr, address(this)); address payable user = payable(getUserAddress()); uint256 maxBorrow = getMaxBorrow(_data.srcAddr, address(this)); _data.srcAmount = _data.srcAmount > maxBorrow ? maxBorrow : _data.srcAmount; // borrow amount ILendingPool(lendingPool).borrow(_data.srcAddr, _data.srcAmount, VARIABLE_RATE, AAVE_REFERRAL_CODE); uint256 destAmount; if (_data.destAddr != _data.srcAddr) { _data.srcAmount -= getFee(_data.srcAmount, user, _gasCost, _data.srcAddr); // swap (, destAmount) = _sell(_data); } else { _data.srcAmount -= getGasCost(_data.srcAmount, user, _gasCost, _data.srcAddr); destAmount = _data.srcAmount; } if (_data.destAddr == ETH_ADDR) { ILendingPool(lendingPool).deposit{value: destAmount}(_data.destAddr, destAmount, AAVE_REFERRAL_CODE); } else { approveToken(_data.destAddr, lendingPoolCore); ILendingPool(lendingPool).deposit(_data.destAddr, destAmount, AAVE_REFERRAL_CODE); } if (!collateralEnabled) { ILendingPool(lendingPool).setUserUseReserveAsCollateral(_data.destAddr, true); } // returning to msg.sender as it is the address that actually sent 0x fee sendContractBalance(ETH_ADDR, tx.origin, min(address(this).balance, msg.value)); // send all leftovers from dest addr to proxy owner sendFullContractBalance(_data.destAddr, user); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "AaveBoost", abi.encode(_data.srcAddr, _data.destAddr, _data.srcAmount, destAmount)); } } contract CompoundLoanInfo is CompoundSafetyRatio { struct LoanData { address user; uint128 ratio; address[] collAddr; address[] borrowAddr; uint[] collAmounts; uint[] borrowAmounts; } struct TokenInfo { address cTokenAddress; address underlyingTokenAddress; uint collateralFactor; uint price; } struct TokenInfoFull { address underlyingTokenAddress; uint supplyRate; uint borrowRate; uint exchangeRate; uint marketLiquidity; uint totalSupply; uint totalBorrow; uint collateralFactor; uint price; } address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant CETH_ADDRESS = 0x4Ddc2D193948926D02f9B1fE9e1daa0718270ED5; /// @notice Calcualted the ratio of coll/debt for a compound user /// @param _user Address of the user function getRatio(address _user) public view returns (uint) { // For each asset the account is in return getSafetyRatio(_user); } /// @notice Fetches Compound prices for tokens /// @param _cTokens Arr. of cTokens for which to get the prices /// @return prices Array of prices function getPrices(address[] memory _cTokens) public view returns (uint[] memory prices) { prices = new uint[](_cTokens.length); address oracleAddr = comp.oracle(); for (uint i = 0; i < _cTokens.length; ++i) { prices[i] = CompoundOracleInterface(oracleAddr).getUnderlyingPrice(_cTokens[i]); } } /// @notice Fetches Compound collateral factors for tokens /// @param _cTokens Arr. of cTokens for which to get the coll. factors /// @return collFactors Array of coll. factors function getCollFactors(address[] memory _cTokens) public view returns (uint[] memory collFactors) { collFactors = new uint[](_cTokens.length); for (uint i = 0; i < _cTokens.length; ++i) { (, collFactors[i]) = comp.markets(_cTokens[i]); } } /// @notice Fetches all the collateral/debt address and amounts, denominated in usd /// @param _user Address of the user /// @return data LoanData information function getLoanData(address _user) public view returns (LoanData memory data) { address[] memory assets = comp.getAssetsIn(_user); address oracleAddr = comp.oracle(); data = LoanData({ user: _user, ratio: 0, collAddr: new address[](assets.length), borrowAddr: new address[](assets.length), collAmounts: new uint[](assets.length), borrowAmounts: new uint[](assets.length) }); uint collPos = 0; uint borrowPos = 0; for (uint i = 0; i < assets.length; i++) { address asset = assets[i]; (, uint cTokenBalance, uint borrowBalance, uint exchangeRateMantissa) = CTokenInterface(asset).getAccountSnapshot(_user); Exp memory oraclePrice; if (cTokenBalance != 0 || borrowBalance != 0) { oraclePrice = Exp({mantissa: CompoundOracleInterface(oracleAddr).getUnderlyingPrice(asset)}); } // Sum up collateral in Usd if (cTokenBalance != 0) { Exp memory exchangeRate = Exp({mantissa: exchangeRateMantissa}); (, Exp memory tokensToUsd) = mulExp(exchangeRate, oraclePrice); data.collAddr[collPos] = asset; (, data.collAmounts[collPos]) = mulScalarTruncate(tokensToUsd, cTokenBalance); collPos++; } // Sum up debt in Usd if (borrowBalance != 0) { data.borrowAddr[borrowPos] = asset; (, data.borrowAmounts[borrowPos]) = mulScalarTruncate(oraclePrice, borrowBalance); borrowPos++; } } data.ratio = uint128(getSafetyRatio(_user)); return data; } function getTokenBalances(address _user, address[] memory _cTokens) public view returns (uint[] memory balances, uint[] memory borrows) { balances = new uint[](_cTokens.length); borrows = new uint[](_cTokens.length); for (uint i = 0; i < _cTokens.length; i++) { address asset = _cTokens[i]; (, uint cTokenBalance, uint borrowBalance, uint exchangeRateMantissa) = CTokenInterface(asset).getAccountSnapshot(_user); Exp memory exchangeRate = Exp({mantissa: exchangeRateMantissa}); (, balances[i]) = mulScalarTruncate(exchangeRate, cTokenBalance); borrows[i] = borrowBalance; } } /// @notice Fetches all the collateral/debt address and amounts, denominated in usd /// @param _users Addresses of the user /// @return loans Array of LoanData information function getLoanDataArr(address[] memory _users) public view returns (LoanData[] memory loans) { loans = new LoanData[](_users.length); for (uint i = 0; i < _users.length; ++i) { loans[i] = getLoanData(_users[i]); } } /// @notice Calcualted the ratio of coll/debt for a compound user /// @param _users Addresses of the user /// @return ratios Array of ratios function getRatios(address[] memory _users) public view returns (uint[] memory ratios) { ratios = new uint[](_users.length); for (uint i = 0; i < _users.length; ++i) { ratios[i] = getSafetyRatio(_users[i]); } } /// @notice Information about cTokens /// @param _cTokenAddresses Array of cTokens addresses /// @return tokens Array of cTokens infomartion function getTokensInfo(address[] memory _cTokenAddresses) public returns(TokenInfo[] memory tokens) { tokens = new TokenInfo[](_cTokenAddresses.length); address oracleAddr = comp.oracle(); for (uint i = 0; i < _cTokenAddresses.length; ++i) { (, uint collFactor) = comp.markets(_cTokenAddresses[i]); tokens[i] = TokenInfo({ cTokenAddress: _cTokenAddresses[i], underlyingTokenAddress: getUnderlyingAddr(_cTokenAddresses[i]), collateralFactor: collFactor, price: CompoundOracleInterface(oracleAddr).getUnderlyingPrice(_cTokenAddresses[i]) }); } } /// @notice Information about cTokens /// @param _cTokenAddresses Array of cTokens addresses /// @return tokens Array of cTokens infomartion function getFullTokensInfo(address[] memory _cTokenAddresses) public returns(TokenInfoFull[] memory tokens) { tokens = new TokenInfoFull[](_cTokenAddresses.length); address oracleAddr = comp.oracle(); for (uint i = 0; i < _cTokenAddresses.length; ++i) { (, uint collFactor) = comp.markets(_cTokenAddresses[i]); CTokenInterface cToken = CTokenInterface(_cTokenAddresses[i]); tokens[i] = TokenInfoFull({ underlyingTokenAddress: getUnderlyingAddr(_cTokenAddresses[i]), supplyRate: cToken.supplyRatePerBlock(), borrowRate: cToken.borrowRatePerBlock(), exchangeRate: cToken.exchangeRateCurrent(), marketLiquidity: cToken.getCash(), totalSupply: cToken.totalSupply(), totalBorrow: cToken.totalBorrowsCurrent(), collateralFactor: collFactor, price: CompoundOracleInterface(oracleAddr).getUnderlyingPrice(_cTokenAddresses[i]) }); } } /// @notice Returns the underlying address of the cToken asset /// @param _cTokenAddress cToken address /// @return Token address of the cToken specified function getUnderlyingAddr(address _cTokenAddress) internal returns (address) { if (_cTokenAddress == CETH_ADDRESS) { return ETH_ADDRESS; } else { return CTokenInterface(_cTokenAddress).underlying(); } } } contract CompoundCreateReceiver is FlashLoanReceiverBase, SaverExchangeCore { ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); ShifterRegistry public constant shifterRegistry = ShifterRegistry(0x2E82103bD91053C781aaF39da17aE58ceE39d0ab); address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address payable public constant WALLET_ADDR = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; address public constant DISCOUNT_ADDR = 0x1b14E8D511c9A4395425314f849bD737BAF8208F; // solhint-disable-next-line no-empty-blocks constructor() public FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) {} struct CompCreateData { address payable proxyAddr; bytes proxyData; address cCollAddr; address cDebtAddr; } /// @notice Called by Aave when sending back the FL amount /// @param _reserve The address of the borrowed token /// @param _amount Amount of FL tokens received /// @param _fee FL Aave fee /// @param _params The params that are sent from the original FL caller contract function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { // Format the call data for DSProxy (CompCreateData memory compCreate, ExchangeData memory exchangeData) = packFunctionCall(_amount, _fee, _params); address leveragedAsset = _reserve; // If the assets are different if (compCreate.cCollAddr != compCreate.cDebtAddr) { (, uint sellAmount) = _sell(exchangeData); getFee(sellAmount, exchangeData.destAddr, compCreate.proxyAddr); leveragedAsset = exchangeData.destAddr; } // Send amount to DSProxy sendToProxy(compCreate.proxyAddr, leveragedAsset); address compOpenProxy = shifterRegistry.getAddr("COMP_SHIFTER"); // Execute the DSProxy call DSProxyInterface(compCreate.proxyAddr).execute(compOpenProxy, compCreate.proxyData); // Repay the loan with the money DSProxy sent back transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { // solhint-disable-next-line avoid-tx-origin tx.origin.transfer(address(this).balance); } } /// @notice Formats function data call so we can call it through DSProxy /// @param _amount Amount of FL /// @param _fee Fee of the FL /// @param _params Saver proxy params function packFunctionCall(uint _amount, uint _fee, bytes memory _params) internal pure returns (CompCreateData memory compCreate, ExchangeData memory exchangeData) { ( uint[4] memory numData, // srcAmount, destAmount, minPrice, price0x address[6] memory cAddresses, // cCollAddr, cDebtAddr, srcAddr, destAddr, exchangeAddr, wrapper bytes memory callData, address proxy ) = abi.decode(_params, (uint256[4],address[6],bytes,address)); bytes memory proxyData = abi.encodeWithSignature( "open(address,address,uint256)", cAddresses[0], cAddresses[1], (_amount + _fee)); exchangeData = SaverExchangeCore.ExchangeData({ srcAddr: cAddresses[2], destAddr: cAddresses[3], srcAmount: numData[0], destAmount: numData[1], minPrice: numData[2], wrapper: cAddresses[5], exchangeAddr: cAddresses[4], callData: callData, price0x: numData[3] }); compCreate = CompCreateData({ proxyAddr: payable(proxy), proxyData: proxyData, cCollAddr: cAddresses[0], cDebtAddr: cAddresses[1] }); return (compCreate, exchangeData); } /// @notice Send the FL funds received to DSProxy /// @param _proxy DSProxy address /// @param _reserve Token address function sendToProxy(address payable _proxy, address _reserve) internal { if (_reserve != ETH_ADDRESS) { ERC20(_reserve).safeTransfer(_proxy, ERC20(_reserve).balanceOf(address(this))); } else { _proxy.transfer(address(this).balance); } } function getFee(uint _amount, address _tokenAddr, address _proxy) internal returns (uint feeAmount) { uint fee = 400; DSProxy proxy = DSProxy(payable(_proxy)); address user = proxy.owner(); if (Discount(DISCOUNT_ADDR).isCustomFeeSet(user)) { fee = Discount(DISCOUNT_ADDR).getCustomServiceFee(user); } feeAmount = (fee == 0) ? 0 : (_amount / fee); // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } if (_tokenAddr == ETH_ADDRESS) { WALLET_ADDR.transfer(feeAmount); } else { ERC20(_tokenAddr).safeTransfer(WALLET_ADDR, feeAmount); } } // solhint-disable-next-line no-empty-blocks receive() external override(FlashLoanReceiverBase, SaverExchangeCore) payable {} } contract CompoundSaverFlashLoan is FlashLoanReceiverBase, SaverExchangeCore { ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); address payable public COMPOUND_SAVER_FLASH_PROXY = 0xcEAb38B5C88F33Dabe4D31BDD384E08215526632; address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public owner; using SafeERC20 for ERC20; constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public { owner = msg.sender; } /// @notice Called by Aave when sending back the FL amount /// @param _reserve The address of the borrowed token /// @param _amount Amount of FL tokens received /// @param _fee FL Aave fee /// @param _params The params that are sent from the original FL caller contract function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { // Format the call data for DSProxy (bytes memory proxyData, address payable proxyAddr) = packFunctionCall(_amount, _fee, _params); // Send Flash loan amount to DSProxy sendLoanToProxy(proxyAddr, _reserve, _amount); // Execute the DSProxy call DSProxyInterface(proxyAddr).execute(COMPOUND_SAVER_FLASH_PROXY, proxyData); // Repay the loan with the money DSProxy sent back transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } } /// @notice Formats function data call so we can call it through DSProxy /// @param _amount Amount of FL /// @param _fee Fee of the FL /// @param _params Saver proxy params /// @return proxyData Formated function call data function packFunctionCall(uint _amount, uint _fee, bytes memory _params) internal pure returns (bytes memory proxyData, address payable) { ( bytes memory exDataBytes, address[2] memory cAddresses, // cCollAddress, cBorrowAddress uint256 gasCost, bool isRepay, address payable proxyAddr ) = abi.decode(_params, (bytes,address[2],uint256,bool,address)); ExchangeData memory _exData = unpackExchangeData(exDataBytes); uint[2] memory flashLoanData = [_amount, _fee]; if (isRepay) { proxyData = abi.encodeWithSignature("flashRepay((address,address,uint256,uint256,uint256,address,address,bytes,uint256),address[2],uint256,uint256[2])", _exData, cAddresses, gasCost, flashLoanData); } else { proxyData = abi.encodeWithSignature("flashBoost((address,address,uint256,uint256,uint256,address,address,bytes,uint256),address[2],uint256,uint256[2])", _exData, cAddresses, gasCost, flashLoanData); } return (proxyData, proxyAddr); } /// @notice Send the FL funds received to DSProxy /// @param _proxy DSProxy address /// @param _reserve Token address /// @param _amount Amount of tokens function sendLoanToProxy(address payable _proxy, address _reserve, uint _amount) internal { if (_reserve != ETH_ADDRESS) { ERC20(_reserve).safeTransfer(_proxy, _amount); } _proxy.transfer(address(this).balance); } receive() external override(SaverExchangeCore, FlashLoanReceiverBase) payable {} } contract CompoundSaverFlashProxy is SaverExchangeCore, CompoundSaverHelper { address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; using SafeERC20 for ERC20; /// @notice Repays the position and sends tokens back for FL /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress] /// @param _gasCost Gas cost for transaction /// @param _flashLoanData Data about FL [amount, fee] function flashRepay( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost, uint[2] memory _flashLoanData // amount, fee ) public payable { enterMarket(_cAddresses[0], _cAddresses[1]); address payable user = payable(getUserAddress()); uint flashBorrowed = _flashLoanData[0] + _flashLoanData[1]; uint maxColl = getMaxCollateral(_cAddresses[0], address(this)); // draw max coll require(CTokenInterface(_cAddresses[0]).redeemUnderlying(maxColl) == 0); address collToken = getUnderlyingAddr(_cAddresses[0]); address borrowToken = getUnderlyingAddr(_cAddresses[1]); uint swapAmount = 0; if (collToken != borrowToken) { // swap max coll + loanAmount _exData.srcAmount = maxColl + _flashLoanData[0]; (,swapAmount) = _sell(_exData); // get fee swapAmount -= getFee(swapAmount, user, _gasCost, _cAddresses[1]); } else { swapAmount = (maxColl + _flashLoanData[0]); swapAmount -= getGasCost(swapAmount, _gasCost, _cAddresses[1]); } // payback debt paybackDebt(swapAmount, _cAddresses[1], borrowToken, user); // draw collateral for loanAmount + loanFee require(CTokenInterface(_cAddresses[0]).redeemUnderlying(flashBorrowed) == 0); // repay flash loan returnFlashLoan(collToken, flashBorrowed); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "CompoundRepay", abi.encode(_exData.srcAmount, swapAmount, collToken, borrowToken)); } /// @notice Boosts the position and sends tokens back for FL /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress] /// @param _gasCost Gas cost for specific transaction /// @param _flashLoanData Data about FL [amount, fee] function flashBoost( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost, uint[2] memory _flashLoanData // amount, fee ) public payable { enterMarket(_cAddresses[0], _cAddresses[1]); address payable user = payable(getUserAddress()); uint flashBorrowed = _flashLoanData[0] + _flashLoanData[1]; // borrow max amount uint borrowAmount = getMaxBorrow(_cAddresses[1], address(this)); require(CTokenInterface(_cAddresses[1]).borrow(borrowAmount) == 0); address collToken = getUnderlyingAddr(_cAddresses[0]); address borrowToken = getUnderlyingAddr(_cAddresses[1]); uint swapAmount = 0; if (collToken != borrowToken) { // get dfs fee borrowAmount -= getFee((borrowAmount + _flashLoanData[0]), user, _gasCost, _cAddresses[1]); _exData.srcAmount = (borrowAmount + _flashLoanData[0]); (,swapAmount) = _sell(_exData); } else { swapAmount = (borrowAmount + _flashLoanData[0]); swapAmount -= getGasCost(swapAmount, _gasCost, _cAddresses[1]); } // deposit swaped collateral depositCollateral(collToken, _cAddresses[0], swapAmount); // borrow token to repay flash loan require(CTokenInterface(_cAddresses[1]).borrow(flashBorrowed) == 0); // repay flash loan returnFlashLoan(borrowToken, flashBorrowed); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "CompoundBoost", abi.encode(_exData.srcAmount, swapAmount, collToken, borrowToken)); } /// @notice Helper method to deposit tokens in Compound /// @param _collToken Token address of the collateral /// @param _cCollToken CToken address of the collateral /// @param _depositAmount Amount to deposit function depositCollateral(address _collToken, address _cCollToken, uint _depositAmount) internal { approveCToken(_collToken, _cCollToken); if (_collToken != ETH_ADDRESS) { require(CTokenInterface(_cCollToken).mint(_depositAmount) == 0); } else { CEtherInterface(_cCollToken).mint{value: _depositAmount}(); // reverts on fail } } /// @notice Returns the tokens/ether to the msg.sender which is the FL contract /// @param _tokenAddr Address of token which we return /// @param _amount Amount to return function returnFlashLoan(address _tokenAddr, uint _amount) internal { if (_tokenAddr != ETH_ADDRESS) { ERC20(_tokenAddr).safeTransfer(msg.sender, _amount); } msg.sender.transfer(address(this).balance); } } contract CompoundSaverProxy is CompoundSaverHelper, SaverExchangeCore { DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); /// @notice Withdraws collateral, converts to borrowed token and repays debt /// @dev Called through the DSProxy /// @param _exData Exchange data /// @param _cAddresses Coll/Debt addresses [cCollAddress, cBorrowAddress] /// @param _gasCost Gas cost for specific transaction function repay( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost ) public payable { enterMarket(_cAddresses[0], _cAddresses[1]); address payable user = payable(getUserAddress()); uint maxColl = getMaxCollateral(_cAddresses[0], address(this)); uint collAmount = (_exData.srcAmount > maxColl) ? maxColl : _exData.srcAmount; require(CTokenInterface(_cAddresses[0]).redeemUnderlying(collAmount) == 0); address collToken = getUnderlyingAddr(_cAddresses[0]); address borrowToken = getUnderlyingAddr(_cAddresses[1]); uint swapAmount = 0; if (collToken != borrowToken) { _exData.srcAmount = collAmount; (, swapAmount) = _sell(_exData); swapAmount -= getFee(swapAmount, user, _gasCost, _cAddresses[1]); } else { swapAmount = collAmount; swapAmount -= getGasCost(swapAmount, _gasCost, _cAddresses[1]); } paybackDebt(swapAmount, _cAddresses[1], borrowToken, user); // handle 0x fee tx.origin.transfer(address(this).balance); // log amount, collToken, borrowToken logger.Log(address(this), msg.sender, "CompoundRepay", abi.encode(_exData.srcAmount, swapAmount, collToken, borrowToken)); } /// @notice Borrows token, converts to collateral, and adds to position /// @dev Called through the DSProxy /// @param _exData Exchange data /// @param _cAddresses Coll/Debt addresses [cCollAddress, cBorrowAddress] /// @param _gasCost Gas cost for specific transaction function boost( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost ) public payable { enterMarket(_cAddresses[0], _cAddresses[1]); address payable user = payable(getUserAddress()); uint maxBorrow = getMaxBorrow(_cAddresses[1], address(this)); uint borrowAmount = (_exData.srcAmount > maxBorrow) ? maxBorrow : _exData.srcAmount; require(CTokenInterface(_cAddresses[1]).borrow(borrowAmount) == 0); address collToken = getUnderlyingAddr(_cAddresses[0]); address borrowToken = getUnderlyingAddr(_cAddresses[1]); uint swapAmount = 0; if (collToken != borrowToken) { borrowAmount -= getFee(borrowAmount, user, _gasCost, _cAddresses[1]); _exData.srcAmount = borrowAmount; (,swapAmount) = _sell(_exData); } else { swapAmount = borrowAmount; swapAmount -= getGasCost(swapAmount, _gasCost, _cAddresses[1]); } approveCToken(collToken, _cAddresses[0]); if (collToken != ETH_ADDRESS) { require(CTokenInterface(_cAddresses[0]).mint(swapAmount) == 0); } else { CEtherInterface(_cAddresses[0]).mint{value: swapAmount}(); // reverts on fail } // handle 0x fee tx.origin.transfer(address(this).balance); // log amount, collToken, borrowToken logger.Log(address(this), msg.sender, "CompoundBoost", abi.encode(_exData.srcAmount, swapAmount, collToken, borrowToken)); } } contract CreamSaverFlashLoan is FlashLoanReceiverBase, SaverExchangeCore { ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); address payable public COMPOUND_SAVER_FLASH_PROXY = 0x1e012554891d271eDc80ba8eB146EA5FF596fA51; address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public owner; using SafeERC20 for ERC20; constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public { owner = msg.sender; } /// @notice Called by Aave when sending back the FL amount /// @param _reserve The address of the borrowed token /// @param _amount Amount of FL tokens received /// @param _fee FL Aave fee /// @param _params The params that are sent from the original FL caller contract function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { // Format the call data for DSProxy (bytes memory proxyData, address payable proxyAddr) = packFunctionCall(_amount, _fee, _params); // Send Flash loan amount to DSProxy sendLoanToProxy(proxyAddr, _reserve, _amount); // Execute the DSProxy call DSProxyInterface(proxyAddr).execute(COMPOUND_SAVER_FLASH_PROXY, proxyData); // Repay the loan with the money DSProxy sent back transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } } /// @notice Formats function data call so we can call it through DSProxy /// @param _amount Amount of FL /// @param _fee Fee of the FL /// @param _params Saver proxy params /// @return proxyData Formated function call data function packFunctionCall(uint _amount, uint _fee, bytes memory _params) internal pure returns (bytes memory proxyData, address payable) { ( bytes memory exDataBytes, address[2] memory cAddresses, // cCollAddress, cBorrowAddress uint256 gasCost, bool isRepay, address payable proxyAddr ) = abi.decode(_params, (bytes,address[2],uint256,bool,address)); ExchangeData memory _exData = unpackExchangeData(exDataBytes); uint[2] memory flashLoanData = [_amount, _fee]; if (isRepay) { proxyData = abi.encodeWithSignature("flashRepay((address,address,uint256,uint256,uint256,address,address,bytes,uint256),address[2],uint256,uint256[2])", _exData, cAddresses, gasCost, flashLoanData); } else { proxyData = abi.encodeWithSignature("flashBoost((address,address,uint256,uint256,uint256,address,address,bytes,uint256),address[2],uint256,uint256[2])", _exData, cAddresses, gasCost, flashLoanData); } return (proxyData, proxyAddr); } /// @notice Send the FL funds received to DSProxy /// @param _proxy DSProxy address /// @param _reserve Token address /// @param _amount Amount of tokens function sendLoanToProxy(address payable _proxy, address _reserve, uint _amount) internal { if (_reserve != ETH_ADDRESS) { ERC20(_reserve).safeTransfer(_proxy, _amount); } _proxy.transfer(address(this).balance); } receive() external override(SaverExchangeCore, FlashLoanReceiverBase) payable {} } contract CreamSaverFlashProxy is SaverExchangeCore, CreamSaverHelper { address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; using SafeERC20 for ERC20; /// @notice Repays the position and sends tokens back for FL /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress] /// @param _gasCost Gas cost for transaction /// @param _flashLoanData Data about FL [amount, fee] function flashRepay( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost, uint[2] memory _flashLoanData // amount, fee ) public payable { enterMarket(_cAddresses[0], _cAddresses[1]); address payable user = payable(getUserAddress()); uint flashBorrowed = _flashLoanData[0] + _flashLoanData[1]; uint maxColl = getMaxCollateral(_cAddresses[0], address(this)); // draw max coll require(CTokenInterface(_cAddresses[0]).redeemUnderlying(maxColl) == 0); address collToken = getUnderlyingAddr(_cAddresses[0]); address borrowToken = getUnderlyingAddr(_cAddresses[1]); uint swapAmount = 0; if (collToken != borrowToken) { // swap max coll + loanAmount _exData.srcAmount = maxColl + _flashLoanData[0]; (,swapAmount) = _sell(_exData); // get fee swapAmount -= getFee(swapAmount, user, _gasCost, _cAddresses[1]); } else { swapAmount = (maxColl + _flashLoanData[0]); swapAmount -= getGasCost(swapAmount, _gasCost, _cAddresses[1]); } // payback debt paybackDebt(swapAmount, _cAddresses[1], borrowToken, user); // draw collateral for loanAmount + loanFee require(CTokenInterface(_cAddresses[0]).redeemUnderlying(flashBorrowed) == 0); // repay flash loan returnFlashLoan(collToken, flashBorrowed); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "CreamRepay", abi.encode(_exData.srcAmount, swapAmount, collToken, borrowToken)); } /// @notice Boosts the position and sends tokens back for FL /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress] /// @param _gasCost Gas cost for specific transaction /// @param _flashLoanData Data about FL [amount, fee] function flashBoost( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost, uint[2] memory _flashLoanData // amount, fee ) public payable { enterMarket(_cAddresses[0], _cAddresses[1]); address payable user = payable(getUserAddress()); uint flashBorrowed = _flashLoanData[0] + _flashLoanData[1]; // borrow max amount uint borrowAmount = getMaxBorrow(_cAddresses[1], address(this)); require(CTokenInterface(_cAddresses[1]).borrow(borrowAmount) == 0); address collToken = getUnderlyingAddr(_cAddresses[0]); address borrowToken = getUnderlyingAddr(_cAddresses[1]); uint swapAmount = 0; if (collToken != borrowToken) { // get dfs fee borrowAmount -= getFee((borrowAmount + _flashLoanData[0]), user, _gasCost, _cAddresses[1]); _exData.srcAmount = (borrowAmount + _flashLoanData[0]); (,swapAmount) = _sell(_exData); } else { swapAmount = (borrowAmount + _flashLoanData[0]); swapAmount -= getGasCost(swapAmount, _gasCost, _cAddresses[1]); } // deposit swaped collateral depositCollateral(collToken, _cAddresses[0], swapAmount); // borrow token to repay flash loan require(CTokenInterface(_cAddresses[1]).borrow(flashBorrowed) == 0); // repay flash loan returnFlashLoan(borrowToken, flashBorrowed); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "CreamBoost", abi.encode(_exData.srcAmount, swapAmount, collToken, borrowToken)); } /// @notice Helper method to deposit tokens in Compound /// @param _collToken Token address of the collateral /// @param _cCollToken CToken address of the collateral /// @param _depositAmount Amount to deposit function depositCollateral(address _collToken, address _cCollToken, uint _depositAmount) internal { approveCToken(_collToken, _cCollToken); if (_collToken != ETH_ADDRESS) { require(CTokenInterface(_cCollToken).mint(_depositAmount) == 0); } else { CEtherInterface(_cCollToken).mint{value: _depositAmount}(); // reverts on fail } } /// @notice Returns the tokens/ether to the msg.sender which is the FL contract /// @param _tokenAddr Address of token which we return /// @param _amount Amount to return function returnFlashLoan(address _tokenAddr, uint _amount) internal { if (_tokenAddr != ETH_ADDRESS) { ERC20(_tokenAddr).safeTransfer(msg.sender, _amount); } msg.sender.transfer(address(this).balance); } } contract CreamSaverProxy is CreamSaverHelper, SaverExchangeCore { DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); /// @notice Withdraws collateral, converts to borrowed token and repays debt /// @dev Called through the DSProxy /// @param _exData Exchange data /// @param _cAddresses Coll/Debt addresses [cCollAddress, cBorrowAddress] /// @param _gasCost Gas cost for specific transaction function repay( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost ) public payable { enterMarket(_cAddresses[0], _cAddresses[1]); address payable user = payable(getUserAddress()); uint maxColl = getMaxCollateral(_cAddresses[0], address(this)); uint collAmount = (_exData.srcAmount > maxColl) ? maxColl : _exData.srcAmount; require(CTokenInterface(_cAddresses[0]).redeemUnderlying(collAmount) == 0); address collToken = getUnderlyingAddr(_cAddresses[0]); address borrowToken = getUnderlyingAddr(_cAddresses[1]); uint swapAmount = 0; if (collToken != borrowToken) { (, swapAmount) = _sell(_exData); swapAmount -= getFee(swapAmount, user, _gasCost, _cAddresses[1]); } else { swapAmount = collAmount; swapAmount -= getGasCost(swapAmount, _gasCost, _cAddresses[1]); } paybackDebt(swapAmount, _cAddresses[1], borrowToken, user); // handle 0x fee tx.origin.transfer(address(this).balance); // log amount, collToken, borrowToken logger.Log(address(this), msg.sender, "CreamRepay", abi.encode(_exData.srcAmount, swapAmount, collToken, borrowToken)); } /// @notice Borrows token, converts to collateral, and adds to position /// @dev Called through the DSProxy /// @param _exData Exchange data /// @param _cAddresses Coll/Debt addresses [cCollAddress, cBorrowAddress] /// @param _gasCost Gas cost for specific transaction function boost( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost ) public payable { enterMarket(_cAddresses[0], _cAddresses[1]); address payable user = payable(getUserAddress()); uint maxBorrow = getMaxBorrow(_cAddresses[1], address(this)); uint borrowAmount = (_exData.srcAmount > maxBorrow) ? maxBorrow : _exData.srcAmount; require(CTokenInterface(_cAddresses[1]).borrow(borrowAmount) == 0); address collToken = getUnderlyingAddr(_cAddresses[0]); address borrowToken = getUnderlyingAddr(_cAddresses[1]); uint swapAmount = 0; if (collToken != borrowToken) { borrowAmount -= getFee(borrowAmount, user, _gasCost, _cAddresses[1]); _exData.srcAmount = borrowAmount; (,swapAmount) = _sell(_exData); } else { swapAmount = borrowAmount; swapAmount -= getGasCost(swapAmount, _gasCost, _cAddresses[1]); } approveCToken(collToken, _cAddresses[0]); if (collToken != ETH_ADDRESS) { require(CTokenInterface(_cAddresses[0]).mint(swapAmount) == 0); } else { CEtherInterface(_cAddresses[0]).mint{value: swapAmount}(); // reverts on fail } // handle 0x fee tx.origin.transfer(address(this).balance); // log amount, collToken, borrowToken logger.Log(address(this), msg.sender, "CreamBoost", abi.encode(_exData.srcAmount, swapAmount, collToken, borrowToken)); } } contract SaverExchange is SaverExchangeCore, AdminAuth, GasBurner { using SafeERC20 for ERC20; uint256 public constant SERVICE_FEE = 800; // 0.125% Fee // solhint-disable-next-line const-name-snakecase DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); uint public burnAmount = 10; /// @notice Takes a src amount of tokens and converts it into the dest token /// @dev Takes fee from the _srcAmount before the exchange /// @param exData [srcAddr, destAddr, srcAmount, destAmount, minPrice, exchangeType, exchangeAddr, callData, price0x] /// @param _user User address who called the exchange function sell(ExchangeData memory exData, address payable _user) public payable burnGas(burnAmount) { // take fee uint dfsFee = getFee(exData.srcAmount, exData.srcAddr); exData.srcAmount = sub(exData.srcAmount, dfsFee); // Perform the exchange (address wrapper, uint destAmount) = _sell(exData); // send back any leftover ether or tokens sendLeftover(exData.srcAddr, exData.destAddr, _user); // log the event logger.Log(address(this), msg.sender, "ExchangeSell", abi.encode(wrapper, exData.srcAddr, exData.destAddr, exData.srcAmount, destAmount)); } /// @notice Takes a dest amount of tokens and converts it from the src token /// @dev Send always more than needed for the swap, extra will be returned /// @param exData [srcAddr, destAddr, srcAmount, destAmount, minPrice, exchangeType, exchangeAddr, callData, price0x] /// @param _user User address who called the exchange function buy(ExchangeData memory exData, address payable _user) public payable burnGas(burnAmount){ uint dfsFee = getFee(exData.srcAmount, exData.srcAddr); exData.srcAmount = sub(exData.srcAmount, dfsFee); // Perform the exchange (address wrapper, uint srcAmount) = _buy(exData); // send back any leftover ether or tokens sendLeftover(exData.srcAddr, exData.destAddr, _user); // log the event logger.Log(address(this), msg.sender, "ExchangeBuy", abi.encode(wrapper, exData.srcAddr, exData.destAddr, srcAmount, exData.destAmount)); } /// @notice Takes a feePercentage and sends it to wallet /// @param _amount Dai amount of the whole trade /// @param _token Address of the token /// @return feeAmount Amount in Dai owner earned on the fee function getFee(uint256 _amount, address _token) internal returns (uint256 feeAmount) { uint256 fee = SERVICE_FEE; if (Discount(DISCOUNT_ADDRESS).isCustomFeeSet(msg.sender)) { fee = Discount(DISCOUNT_ADDRESS).getCustomServiceFee(msg.sender); } if (fee == 0) { feeAmount = 0; } else { feeAmount = _amount / fee; if (_token == KYBER_ETH_ADDRESS) { WALLET_ID.transfer(feeAmount); } else { ERC20(_token).safeTransfer(WALLET_ID, feeAmount); } } } /// @notice Changes the amount of gas token we burn for each call /// @dev Only callable by the owner /// @param _newBurnAmount New amount of gas tokens to be burned function changeBurnAmount(uint _newBurnAmount) public { require(owner == msg.sender); burnAmount = _newBurnAmount; } } contract MCDSaverFlashLoan is MCDSaverProxy, AdminAuth, FlashLoanReceiverBase { ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public {} struct SaverData { uint cdpId; uint gasCost; uint loanAmount; uint fee; address joinAddr; } function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { //check the contract has the specified balance require(_amount <= getBalanceInternal(address(this), _reserve), "Invalid balance for the contract"); ( bytes memory exDataBytes, uint cdpId, uint gasCost, address joinAddr, bool isRepay ) = abi.decode(_params, (bytes,uint256,uint256,address,bool)); ExchangeData memory exchangeData = unpackExchangeData(exDataBytes); SaverData memory saverData = SaverData({ cdpId: cdpId, gasCost: gasCost, loanAmount: _amount, fee: _fee, joinAddr: joinAddr }); if (isRepay) { repayWithLoan(exchangeData, saverData); } else { boostWithLoan(exchangeData, saverData); } transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } } function boostWithLoan( ExchangeData memory _exchangeData, SaverData memory _saverData ) internal { address user = getOwner(manager, _saverData.cdpId); // Draw users Dai uint maxDebt = getMaxDebt(_saverData.cdpId, manager.ilks(_saverData.cdpId)); uint daiDrawn = drawDai(_saverData.cdpId, manager.ilks(_saverData.cdpId), maxDebt); // Calc. fees uint dsfFee = getFee((daiDrawn + _saverData.loanAmount), _saverData.gasCost, user); uint afterFee = (daiDrawn + _saverData.loanAmount) - dsfFee; // Swap _exchangeData.srcAmount = afterFee; (, uint swapedAmount) = _sell(_exchangeData); // Return collateral addCollateral(_saverData.cdpId, _saverData.joinAddr, swapedAmount); // Draw Dai to repay the flash loan drawDai(_saverData.cdpId, manager.ilks(_saverData.cdpId), (_saverData.loanAmount + _saverData.fee)); logger.Log(address(this), msg.sender, "MCDFlashBoost", abi.encode(_saverData.cdpId, owner, _exchangeData.srcAmount, swapedAmount)); } function repayWithLoan( ExchangeData memory _exchangeData, SaverData memory _saverData ) internal { address user = getOwner(manager, _saverData.cdpId); bytes32 ilk = manager.ilks(_saverData.cdpId); // Draw collateral uint maxColl = getMaxCollateral(_saverData.cdpId, ilk, _saverData.joinAddr); uint collDrawn = drawCollateral(_saverData.cdpId, _saverData.joinAddr, maxColl); // Swap _exchangeData.srcAmount = (_saverData.loanAmount + collDrawn); (, uint swapedAmount) = _sell(_exchangeData); uint paybackAmount = (swapedAmount - getFee(swapedAmount, _saverData.gasCost, user)); paybackAmount = limitLoanAmount(_saverData.cdpId, ilk, paybackAmount, user); // Payback the debt paybackDebt(_saverData.cdpId, ilk, paybackAmount, user); // Draw collateral to repay the flash loan drawCollateral(_saverData.cdpId, _saverData.joinAddr, (_saverData.loanAmount + _saverData.fee)); logger.Log(address(this), msg.sender, "MCDFlashRepay", abi.encode(_saverData.cdpId, owner, _exchangeData.srcAmount, swapedAmount)); } /// @notice Handles that the amount is not bigger than cdp debt and not dust function limitLoanAmount(uint _cdpId, bytes32 _ilk, uint _paybackAmount, address _owner) internal returns (uint256) { uint debt = getAllDebt(address(vat), manager.urns(_cdpId), manager.urns(_cdpId), _ilk); if (_paybackAmount > debt) { ERC20(DAI_ADDRESS).transfer(_owner, (_paybackAmount - debt)); return debt; } uint debtLeft = debt - _paybackAmount; (,,,, uint dust) = vat.ilks(_ilk); dust = dust / 10**27; // Less than dust value if (debtLeft < dust) { uint amountOverDust = (dust - debtLeft); ERC20(DAI_ADDRESS).transfer(_owner, amountOverDust); return (_paybackAmount - amountOverDust); } return _paybackAmount; } receive() external override(FlashLoanReceiverBase, SaverExchangeCore) payable {} } contract CompoundFlashLoanTaker is CompoundSaverProxy, ProxyPermission, GasBurner { ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); address payable public constant COMPOUND_SAVER_FLASH_LOAN = 0xCeB190A35D9D4804b9CE8d0CF79239f6949BfCcB; address public constant AAVE_POOL_CORE = 0x3dfd23A6c5E8BbcFc9581d2E864a68feb6a076d3; /// @notice Repays the position with it's own fund or with FL if needed /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress, exchangeAddress] /// @param _gasCost Gas cost for specific transaction function repayWithLoan( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost ) public payable burnGas(25) { uint maxColl = getMaxCollateral(_cAddresses[0], address(this)); uint availableLiquidity = getAvailableLiquidity(_exData.srcAddr); if (_exData.srcAmount <= maxColl || availableLiquidity == 0) { repay(_exData, _cAddresses, _gasCost); } else { // 0x fee COMPOUND_SAVER_FLASH_LOAN.transfer(msg.value); uint loanAmount = (_exData.srcAmount - maxColl); if (loanAmount > availableLiquidity) loanAmount = availableLiquidity; bytes memory encoded = packExchangeData(_exData); bytes memory paramsData = abi.encode(encoded, _cAddresses, _gasCost, true, address(this)); givePermission(COMPOUND_SAVER_FLASH_LOAN); lendingPool.flashLoan(COMPOUND_SAVER_FLASH_LOAN, getUnderlyingAddr(_cAddresses[0]), loanAmount, paramsData); removePermission(COMPOUND_SAVER_FLASH_LOAN); logger.Log(address(this), msg.sender, "CompoundFlashRepay", abi.encode(loanAmount, _exData.srcAmount, _cAddresses[0])); } } /// @notice Boosts the position with it's own fund or with FL if needed /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress, exchangeAddress] /// @param _gasCost Gas cost for specific transaction function boostWithLoan( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost ) public payable burnGas(20) { uint maxBorrow = getMaxBorrow(_cAddresses[1], address(this)); uint availableLiquidity = getAvailableLiquidity(_exData.srcAddr); if (_exData.srcAmount <= maxBorrow || availableLiquidity == 0) { boost(_exData, _cAddresses, _gasCost); } else { // 0x fee COMPOUND_SAVER_FLASH_LOAN.transfer(msg.value); uint loanAmount = (_exData.srcAmount - maxBorrow); if (loanAmount > availableLiquidity) loanAmount = availableLiquidity; bytes memory paramsData = abi.encode(packExchangeData(_exData), _cAddresses, _gasCost, false, address(this)); givePermission(COMPOUND_SAVER_FLASH_LOAN); lendingPool.flashLoan(COMPOUND_SAVER_FLASH_LOAN, getUnderlyingAddr(_cAddresses[1]), loanAmount, paramsData); removePermission(COMPOUND_SAVER_FLASH_LOAN); logger.Log(address(this), msg.sender, "CompoundFlashBoost", abi.encode(loanAmount, _exData.srcAmount, _cAddresses[1])); } } function getAvailableLiquidity(address _tokenAddr) internal view returns (uint liquidity) { if (_tokenAddr == KYBER_ETH_ADDRESS) { liquidity = AAVE_POOL_CORE.balance; } else { liquidity = ERC20(_tokenAddr).balanceOf(AAVE_POOL_CORE); } } } contract CreamFlashLoanTaker is CreamSaverProxy, ProxyPermission, GasBurner { ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); address payable public constant COMPOUND_SAVER_FLASH_LOAN = 0x3ceD2067c0B057611e4E2686Dbe40028962Cc625; address public constant AAVE_POOL_CORE = 0x3dfd23A6c5E8BbcFc9581d2E864a68feb6a076d3; /// @notice Repays the position with it's own fund or with FL if needed /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress, exchangeAddress] /// @param _gasCost Gas cost for specific transaction function repayWithLoan( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost ) public payable burnGas(25) { uint maxColl = getMaxCollateral(_cAddresses[0], address(this)); uint availableLiquidity = getAvailableLiquidity(_exData.srcAddr); if (_exData.srcAmount <= maxColl || availableLiquidity == 0) { repay(_exData, _cAddresses, _gasCost); } else { // 0x fee COMPOUND_SAVER_FLASH_LOAN.transfer(msg.value); uint loanAmount = (_exData.srcAmount - maxColl); bytes memory encoded = packExchangeData(_exData); bytes memory paramsData = abi.encode(encoded, _cAddresses, _gasCost, true, address(this)); givePermission(COMPOUND_SAVER_FLASH_LOAN); lendingPool.flashLoan(COMPOUND_SAVER_FLASH_LOAN, getUnderlyingAddr(_cAddresses[0]), loanAmount, paramsData); removePermission(COMPOUND_SAVER_FLASH_LOAN); logger.Log(address(this), msg.sender, "CreamFlashRepay", abi.encode(loanAmount, _exData.srcAmount, _cAddresses[0])); } } /// @notice Boosts the position with it's own fund or with FL if needed /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress, exchangeAddress] /// @param _gasCost Gas cost for specific transaction function boostWithLoan( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost ) public payable burnGas(20) { uint maxBorrow = getMaxBorrow(_cAddresses[1], address(this)); uint availableLiquidity = getAvailableLiquidity(_exData.srcAddr); if (_exData.srcAmount <= maxBorrow || availableLiquidity == 0) { boost(_exData, _cAddresses, _gasCost); } else { // 0x fee COMPOUND_SAVER_FLASH_LOAN.transfer(msg.value); uint loanAmount = (_exData.srcAmount - maxBorrow); bytes memory paramsData = abi.encode(packExchangeData(_exData), _cAddresses, _gasCost, false, address(this)); givePermission(COMPOUND_SAVER_FLASH_LOAN); lendingPool.flashLoan(COMPOUND_SAVER_FLASH_LOAN, getUnderlyingAddr(_cAddresses[1]), loanAmount, paramsData); removePermission(COMPOUND_SAVER_FLASH_LOAN); logger.Log(address(this), msg.sender, "CreamFlashBoost", abi.encode(loanAmount, _exData.srcAmount, _cAddresses[1])); } } function getAvailableLiquidity(address _tokenAddr) internal view returns (uint liquidity) { if (_tokenAddr == KYBER_ETH_ADDRESS) { liquidity = AAVE_POOL_CORE.balance; } else { liquidity = ERC20(_tokenAddr).balanceOf(AAVE_POOL_CORE); } } }

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{"success": true, "error": null, "results": {"detectors": [{"check": "tx-origin", "impact": "Medium", "confidence": "Medium"}, {"check": "name-reused", "impact": "High", "confidence": "High"}, {"check": "erc20-interface", "impact": "Medium", "confidence": "High"}, {"check": "arbitrary-send", "impact": "High", "confidence": "Medium"}, {"check": "unchecked-lowlevel", "impact": "Medium", "confidence": "Medium"}, {"check": "incorrect-equality", "impact": "Medium", "confidence": "High"}, {"check": "uninitialized-local", "impact": "Medium", "confidence": "Medium"}, {"check": "unchecked-transfer", "impact": "High", "confidence": "Medium"}, {"check": "unused-return", "impact": "Medium", "confidence": "Medium"}, {"check": "locked-ether", "impact": "Medium", "confidence": "High"}]}}

0x7531F4d6b7DFD84ab84f9f56Ef75515bd03F800c

pragma solidity 0.6.12; pragma experimental ABIEncoderV2; interface ERC20 { function totalSupply() external view returns (uint); function decimals() external view returns (uint); function balanceOf(address tokenOwner) external view returns (uint balance); function allowance(address tokenOwner, address spender) external view returns (uint remaining); function transfer(address to, uint tokens) external returns (bool success); function approve(address spender, uint tokens) external returns (bool success); function transferFrom(address from, address to, uint tokens) external returns (bool success); } interface IFeature { enum OwnerSignature { Anyone, // Anyone Required, // Owner required Optional, // Owner and/or guardians Disallowed // guardians only } /** * @notice Utility method to recover any ERC20 token that was sent to the Feature by mistake. * @param _token The token to recover. */ function recoverToken(address _token) external; /** * @notice Inits a Feature for a wallet by e.g. setting some wallet specific parameters in storage. * @param _wallet The wallet. */ function init(address _wallet) external; /** * @notice Helper method to check if an address is an authorised feature of a target wallet. * @param _wallet The target wallet. * @param _feature The address. */ function isFeatureAuthorisedInVersionManager(address _wallet, address _feature) external view returns (bool); /** * @notice Gets the number of valid signatures that must be provided to execute a * specific relayed transaction. * @param _wallet The target wallet. * @param _data The data of the relayed transaction. * @return The number of required signatures and the wallet owner signature requirement. */ function getRequiredSignatures(address _wallet, bytes calldata _data) external view returns (uint256, OwnerSignature); /** * @notice Gets the list of static call signatures that this feature responds to on behalf of wallets */ function getStaticCallSignatures() external view returns (bytes4[] memory); } interface ILimitStorage { struct Limit { // the current limit uint128 current; // the pending limit if any uint128 pending; // when the pending limit becomes the current limit uint64 changeAfter; } struct DailySpent { // The amount already spent during the current period uint128 alreadySpent; // The end of the current period uint64 periodEnd; } function setLimit(address _wallet, Limit memory _limit) external; function getLimit(address _wallet) external view returns (Limit memory _limit); function setDailySpent(address _wallet, DailySpent memory _dailySpent) external; function getDailySpent(address _wallet) external view returns (DailySpent memory _dailySpent); function setLimitAndDailySpent(address _wallet, Limit memory _limit, DailySpent memory _dailySpent) external; function getLimitAndDailySpent(address _wallet) external view returns (Limit memory _limit, DailySpent memory _dailySpent); } interface ILockStorage { function isLocked(address _wallet) external view returns (bool); function getLock(address _wallet) external view returns (uint256); function getLocker(address _wallet) external view returns (address); function setLock(address _wallet, address _locker, uint256 _releaseAfter) external; } interface IModuleRegistry { function registerModule(address _module, bytes32 _name) external; function deregisterModule(address _module) external; function registerUpgrader(address _upgrader, bytes32 _name) external; function deregisterUpgrader(address _upgrader) external; function recoverToken(address _token) external; function moduleInfo(address _module) external view returns (bytes32); function upgraderInfo(address _upgrader) external view returns (bytes32); function isRegisteredModule(address _module) external view returns (bool); function isRegisteredModule(address[] calldata _modules) external view returns (bool); function isRegisteredUpgrader(address _upgrader) external view returns (bool); } interface ITokenPriceRegistry { function getTokenPrice(address _token) external view returns (uint184 _price); function isTokenTradable(address _token) external view returns (bool _isTradable); } interface IVersionManager { /** * @notice Returns true if the feature is authorised for the wallet * @param _wallet The target wallet. * @param _feature The feature. */ function isFeatureAuthorised(address _wallet, address _feature) external view returns (bool); /** * @notice Lets a feature (caller) invoke a wallet. * @param _wallet The target wallet. * @param _to The target address for the transaction. * @param _value The value of the transaction. * @param _data The data of the transaction. */ function checkAuthorisedFeatureAndInvokeWallet( address _wallet, address _to, uint256 _value, bytes calldata _data ) external returns (bytes memory _res); /* ******* Backward Compatibility with old Storages and BaseWallet *************** */ /** * @notice Sets a new owner for the wallet. * @param _newOwner The new owner. */ function setOwner(address _wallet, address _newOwner) external; /** * @notice Lets a feature write data to a storage contract. * @param _wallet The target wallet. * @param _storage The storage contract. * @param _data The data of the call */ function invokeStorage(address _wallet, address _storage, bytes calldata _data) external; /** * @notice Upgrade a wallet to a new version. * @param _wallet the wallet to upgrade * @param _toVersion the new version */ function upgradeWallet(address _wallet, uint256 _toVersion) external; } interface IWallet { /** * @notice Returns the wallet owner. * @return The wallet owner address. */ function owner() external view returns (address); /** * @notice Returns the number of authorised modules. * @return The number of authorised modules. */ function modules() external view returns (uint); /** * @notice Sets a new owner for the wallet. * @param _newOwner The new owner. */ function setOwner(address _newOwner) external; /** * @notice Checks if a module is authorised on the wallet. * @param _module The module address to check. * @return `true` if the module is authorised, otherwise `false`. */ function authorised(address _module) external view returns (bool); /** * @notice Returns the module responsible for a static call redirection. * @param _sig The signature of the static call. * @return the module doing the redirection */ function enabled(bytes4 _sig) external view returns (address); /** * @notice Enables/Disables a module. * @param _module The target module. * @param _value Set to `true` to authorise the module. */ function authoriseModule(address _module, bool _value) external; /** * @notice Enables a static method by specifying the target module to which the call must be delegated. * @param _module The target module. * @param _method The static method signature. */ function enableStaticCall(address _module, bytes4 _method) external; } library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { // Solidity only automatically asserts when dividing by 0 require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } contract BaseFeature is IFeature { // Empty calldata bytes constant internal EMPTY_BYTES = ""; // Mock token address for ETH address constant internal ETH_TOKEN = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; // The address of the Lock storage ILockStorage internal lockStorage; // The address of the Version Manager IVersionManager internal versionManager; event FeatureCreated(bytes32 name); /** * @notice Throws if the wallet is locked. */ modifier onlyWhenUnlocked(address _wallet) { require(!lockStorage.isLocked(_wallet), "BF: wallet locked"); _; } /** * @notice Throws if the sender is not the VersionManager. */ modifier onlyVersionManager() { require(msg.sender == address(versionManager), "BF: caller must be VersionManager"); _; } /** * @notice Throws if the sender is not the owner of the target wallet. */ modifier onlyWalletOwner(address _wallet) { require(isOwner(_wallet, msg.sender), "BF: must be wallet owner"); _; } /** * @notice Throws if the sender is not an authorised feature of the target wallet. */ modifier onlyWalletFeature(address _wallet) { require(versionManager.isFeatureAuthorised(_wallet, msg.sender), "BF: must be a wallet feature"); _; } /** * @notice Throws if the sender is not the owner of the target wallet or the feature itself. */ modifier onlyWalletOwnerOrFeature(address _wallet) { // Wrapping in an internal method reduces deployment cost by avoiding duplication of inlined code verifyOwnerOrAuthorisedFeature(_wallet, msg.sender); _; } constructor( ILockStorage _lockStorage, IVersionManager _versionManager, bytes32 _name ) public { lockStorage = _lockStorage; versionManager = _versionManager; emit FeatureCreated(_name); } /** * @inheritdoc IFeature */ function recoverToken(address _token) external virtual override { uint total = ERC20(_token).balanceOf(address(this)); _token.call(abi.encodeWithSelector(ERC20(_token).transfer.selector, address(versionManager), total)); } /** * @notice Inits the feature for a wallet by doing nothing. * @dev !! Overriding methods need make sure `init()` can only be called by the VersionManager !! * @param _wallet The wallet. */ function init(address _wallet) external virtual override {} /** * @inheritdoc IFeature */ function getRequiredSignatures(address, bytes calldata) external virtual view override returns (uint256, OwnerSignature) { revert("BF: disabled method"); } /** * @inheritdoc IFeature */ function getStaticCallSignatures() external virtual override view returns (bytes4[] memory _sigs) {} /** * @inheritdoc IFeature */ function isFeatureAuthorisedInVersionManager(address _wallet, address _feature) public override view returns (bool) { return versionManager.isFeatureAuthorised(_wallet, _feature); } /** * @notice Checks that the wallet address provided as the first parameter of _data matches _wallet * @return false if the addresses are different. */ function verifyData(address _wallet, bytes calldata _data) internal pure returns (bool) { require(_data.length >= 36, "RM: Invalid dataWallet"); address dataWallet = abi.decode(_data[4:], (address)); return dataWallet == _wallet; } /** * @notice Helper method to check if an address is the owner of a target wallet. * @param _wallet The target wallet. * @param _addr The address. */ function isOwner(address _wallet, address _addr) internal view returns (bool) { return IWallet(_wallet).owner() == _addr; } /** * @notice Verify that the caller is an authorised feature or the wallet owner. * @param _wallet The target wallet. * @param _sender The caller. */ function verifyOwnerOrAuthorisedFeature(address _wallet, address _sender) internal view { require(isFeatureAuthorisedInVersionManager(_wallet, _sender) || isOwner(_wallet, _sender), "BF: must be owner or feature"); } /** * @notice Helper method to invoke a wallet. * @param _wallet The target wallet. * @param _to The target address for the transaction. * @param _value The value of the transaction. * @param _data The data of the transaction. */ function invokeWallet(address _wallet, address _to, uint256 _value, bytes memory _data) internal returns (bytes memory _res) { _res = versionManager.checkAuthorisedFeatureAndInvokeWallet(_wallet, _to, _value, _data); } } contract NftTransfer is BaseFeature{ bytes32 constant NAME = "NftTransfer"; // Equals to `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))` bytes4 private constant ERC721_RECEIVED = 0x150b7a02; // The address of the CryptoKitties contract address public ckAddress; // The token price registry ITokenPriceRegistry public tokenPriceRegistry; // *************** Events *************************** // event NonFungibleTransfer(address indexed wallet, address indexed nftContract, uint256 indexed tokenId, address to, bytes data); // *************** Constructor ********************** // constructor( ILockStorage _lockStorage, ITokenPriceRegistry _tokenPriceRegistry, IVersionManager _versionManager, address _ckAddress ) BaseFeature(_lockStorage, _versionManager, NAME) public { ckAddress = _ckAddress; tokenPriceRegistry = _tokenPriceRegistry; } // *************** External/Public Functions ********************* // /** * @inheritdoc IFeature */ function getRequiredSignatures(address, bytes calldata) external view override returns (uint256, OwnerSignature) { return (1, OwnerSignature.Required); } /** * @inheritdoc IFeature */ function getStaticCallSignatures() external virtual override view returns (bytes4[] memory _sigs) { _sigs = new bytes4[](1); _sigs[0] = ERC721_RECEIVED; } /** * @notice Handle the receipt of an NFT * @notice An ERC721 smart contract calls this function on the recipient contract * after a `safeTransfer`. If the recipient is a BaseWallet, the call to onERC721Received * will be forwarded to the method onERC721Received of the present module. * @return bytes4 `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))` */ function onERC721Received( address /* operator */, address /* from */, uint256 /* tokenId */, bytes calldata /* data*/ ) external returns (bytes4) { return ERC721_RECEIVED; } /** * @notice Lets the owner transfer NFTs from a wallet. * @param _wallet The target wallet. * @param _nftContract The ERC721 address. * @param _to The recipient. * @param _tokenId The NFT id * @param _safe Whether to execute a safe transfer or not * @param _data The data to pass with the transfer. */ function transferNFT( address _wallet, address _nftContract, address _to, uint256 _tokenId, bool _safe, bytes calldata _data ) external onlyWalletOwnerOrFeature(_wallet) onlyWhenUnlocked(_wallet) { bytes memory methodData; if (_nftContract == ckAddress) { methodData = abi.encodeWithSignature("transfer(address,uint256)", _to, _tokenId); } else { if (_safe) { methodData = abi.encodeWithSignature( "safeTransferFrom(address,address,uint256,bytes)", _wallet, _to, _tokenId, _data); } else { require(!coveredByDailyLimit(_nftContract), "NT: Forbidden ERC20 contract"); methodData = abi.encodeWithSignature( "transferFrom(address,address,uint256)", _wallet, _to, _tokenId); } } invokeWallet(_wallet, _nftContract, 0, methodData); emit NonFungibleTransfer(_wallet, _nftContract, _tokenId, _to, _data); } // *************** Internal Functions ********************* // /** * @notice Returns true if the contract is a supported ERC20. * @param _contract The address of the contract. */ function coveredByDailyLimit(address _contract) internal view returns (bool) { return tokenPriceRegistry.getTokenPrice(_contract) > 0; } }

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{"success": true, "error": null, "results": {"detectors": [{"check": "unchecked-lowlevel", "impact": "Medium", "confidence": "Medium"}]}}

0x75A1169E51A3C6336Ef854f76cDE949F999720B1

pragma solidity 0.5.17; pragma experimental ABIEncoderV2; contract Context { // Empty internal constructor, to prevent people from mistakenly deploying // an instance of this contract, which should be used via inheritance. constructor () internal { } // solhint-disable-previous-line no-empty-blocks function _msgSender() internal view returns (address payable) { return msg.sender; } function _msgData() internal view returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } library Counters { using SafeMath for uint256; struct Counter { // This variable should never be directly accessed by users of the library: interactions must be restricted to // the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add // this feature: see https://github.com/ethereum/solidity/issues/4637 uint256 _value; // default: 0 } function current(Counter storage counter) internal view returns (uint256) { return counter._value; } function increment(Counter storage counter) internal { // The {SafeMath} overflow check can be skipped here, see the comment at the top counter._value += 1; } function decrement(Counter storage counter) internal { counter._value = counter._value.sub(1); } } interface IERC165 { /** * @dev Returns true if this contract implements the interface defined by * `interfaceId`. See the corresponding * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section] * to learn more about how these ids are created. * * This function call must use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool); } library Math { /** * @dev Returns the largest of two numbers. */ function max(uint256 a, uint256 b) internal pure returns (uint256) { return a >= b ? a : b; } /** * @dev Returns the smallest of two numbers. */ function min(uint256 a, uint256 b) internal pure returns (uint256) { return a < b ? a : b; } /** * @dev Returns the average of two numbers. The result is rounded towards * zero. */ function average(uint256 a, uint256 b) internal pure returns (uint256) { // (a + b) / 2 can overflow, so we distribute return (a / 2) + (b / 2) + ((a % 2 + b % 2) / 2); } } library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot overflow. * * _Available since v2.4.0._ */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. * * _Available since v2.4.0._ */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { // Solidity only automatically asserts when dividing by 0 require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. * * _Available since v2.4.0._ */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor () internal { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), msgSender); } /** * @dev Returns the address of the current owner. */ function owner() public view returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(isOwner(), "Ownable: caller is not the owner"); _; } /** * @dev Returns true if the caller is the current owner. */ function isOwner() public view returns (bool) { return _msgSender() == _owner; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public onlyOwner { emit OwnershipTransferred(_owner, address(0)); _owner = address(0); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public onlyOwner { _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). */ function _transferOwnership(address newOwner) internal { require(newOwner != address(0), "Ownable: new owner is the zero address"); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } } interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } library SafeERC20 { using SafeMath for uint256; using Address for address; function safeTransfer(IERC20 token, address to, uint256 value) internal { callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal { callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value)); } function safeApprove(IERC20 token, address spender, uint256 value) internal { // safeApprove should only be called when setting an initial allowance, // or when resetting it to zero. To increase and decrease it, use // 'safeIncreaseAllowance' and 'safeDecreaseAllowance' // solhint-disable-next-line max-line-length require((value == 0) || (token.allowance(address(this), spender) == 0), "SafeERC20: approve from non-zero to non-zero allowance" ); callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value)); } function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).add(value); callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero"); callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). */ function callOptionalReturn(IERC20 token, bytes memory data) private { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. // A Solidity high level call has three parts: // 1. The target address is checked to verify it contains contract code // 2. The call itself is made, and success asserted // 3. The return value is decoded, which in turn checks the size of the returned data. // solhint-disable-next-line max-line-length require(address(token).isContract(), "SafeERC20: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = address(token).call(data); require(success, "SafeERC20: low-level call failed"); if (returndata.length > 0) { // Return data is optional // solhint-disable-next-line max-line-length require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } } } contract IERC721 is IERC165 { event Transfer(address indexed from, address indexed to, uint256 indexed tokenId); event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId); event ApprovalForAll(address indexed owner, address indexed operator, bool approved); /** * @dev Returns the number of NFTs in `owner`'s account. */ function balanceOf(address owner) public view returns (uint256 balance); /** * @dev Returns the owner of the NFT specified by `tokenId`. */ function ownerOf(uint256 tokenId) public view returns (address owner); /** * @dev Transfers a specific NFT (`tokenId`) from one account (`from`) to * another (`to`). * * * * Requirements: * - `from`, `to` cannot be zero. * - `tokenId` must be owned by `from`. * - If the caller is not `from`, it must be have been allowed to move this * NFT by either {approve} or {setApprovalForAll}. */ function safeTransferFrom(address from, address to, uint256 tokenId) public; /** * @dev Transfers a specific NFT (`tokenId`) from one account (`from`) to * another (`to`). * * Requirements: * - If the caller is not `from`, it must be approved to move this NFT by * either {approve} or {setApprovalForAll}. */ function transferFrom(address from, address to, uint256 tokenId) public; function approve(address to, uint256 tokenId) public; function getApproved(uint256 tokenId) public view returns (address operator); function setApprovalForAll(address operator, bool _approved) public; function isApprovedForAll(address owner, address operator) public view returns (bool); function safeTransferFrom(address from, address to, uint256 tokenId, bytes memory data) public; } contract IERC721Metadata is IERC721 { function name() external view returns (string memory); function symbol() external view returns (string memory); function tokenURI(uint256 tokenId) external view returns (string memory); } contract IERC721Receiver { /** * @notice Handle the receipt of an NFT * @dev The ERC721 smart contract calls this function on the recipient * after a {IERC721-safeTransferFrom}. This function MUST return the function selector, * otherwise the caller will revert the transaction. The selector to be * returned can be obtained as `this.onERC721Received.selector`. This * function MAY throw to revert and reject the transfer. * Note: the ERC721 contract address is always the message sender. * @param operator The address which called `safeTransferFrom` function * @param from The address which previously owned the token * @param tokenId The NFT identifier which is being transferred * @param data Additional data with no specified format * @return bytes4 `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))` */ function onERC721Received(address operator, address from, uint256 tokenId, bytes memory data) public returns (bytes4); } library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // According to EIP-1052, 0x0 is the value returned for not-yet created accounts // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned // for accounts without code, i.e. `keccak256('')` bytes32 codehash; bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470; // solhint-disable-next-line no-inline-assembly assembly { codehash := extcodehash(account) } return (codehash != accountHash && codehash != 0x0); } /** * @dev Converts an `address` into `address payable`. Note that this is * simply a type cast: the actual underlying value is not changed. * * _Available since v2.4.0._ */ function toPayable(address account) internal pure returns (address payable) { return address(uint160(account)); } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. * * _Available since v2.4.0._ */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-call-value (bool success, ) = recipient.call.value(amount)(""); require(success, "Address: unable to send value, recipient may have reverted"); } } contract ReentrancyGuard { bool private _notEntered; constructor () internal { // Storing an initial non-zero value makes deployment a bit more // expensive, but in exchange the refund on every call to nonReentrant // will be lower in amount. Since refunds are capped to a percetange of // the total transaction's gas, it is best to keep them low in cases // like this one, to increase the likelihood of the full refund coming // into effect. _notEntered = true; } /** * @dev Prevents a contract from calling itself, directly or indirectly. * Calling a `nonReentrant` function from another `nonReentrant` * function is not supported. It is possible to prevent this from happening * by making the `nonReentrant` function external, and make it call a * `private` function that does the actual work. */ modifier nonReentrant() { // On the first call to nonReentrant, _notEntered will be true require(_notEntered, "ReentrancyGuard: reentrant call"); // Any calls to nonReentrant after this point will fail _notEntered = false; _; // By storing the original value once again, a refund is triggered (see // https://eips.ethereum.org/EIPS/eip-2200) _notEntered = true; } } contract DInterest is ReentrancyGuard, Ownable { using SafeMath for uint256; using DecMath for uint256; using SafeERC20 for ERC20; using Address for address; // Constants uint256 internal constant PRECISION = 10**18; uint256 internal constant ONE = 10**18; // User deposit data // Each deposit has an ID used in the depositNFT, which is equal to its index in `deposits` plus 1 struct Deposit { uint256 amount; // Amount of stablecoin deposited uint256 maturationTimestamp; // Unix timestamp after which the deposit may be withdrawn, in seconds uint256 interestOwed; // Deficit incurred to the pool at time of deposit uint256 initialMoneyMarketIncomeIndex; // Money market's income index at time of deposit bool active; // True if not yet withdrawn, false if withdrawn bool finalSurplusIsNegative; uint256 finalSurplusAmount; // Surplus remaining after withdrawal uint256 mintMPHAmount; // Amount of MPH minted to user } Deposit[] internal deposits; uint256 public latestFundedDepositID; // the ID of the most recently created deposit that was funded uint256 public unfundedUserDepositAmount; // the deposited stablecoin amount whose deficit hasn't been funded // Funding data // Each funding has an ID used in the fundingNFT, which is equal to its index in `fundingList` plus 1 struct Funding { // deposits with fromDepositID < ID <= toDepositID are funded uint256 fromDepositID; uint256 toDepositID; uint256 recordedFundedDepositAmount; uint256 recordedMoneyMarketIncomeIndex; } Funding[] internal fundingList; // Params uint256 public MinDepositPeriod; // Minimum deposit period, in seconds uint256 public MaxDepositPeriod; // Maximum deposit period, in seconds uint256 public MinDepositAmount; // Minimum deposit amount for each deposit, in stablecoins uint256 public MaxDepositAmount; // Maximum deposit amount for each deposit, in stablecoins // Instance variables uint256 public totalDeposit; uint256 public totalInterestOwed; // External smart contracts IMoneyMarket public moneyMarket; ERC20 public stablecoin; IFeeModel public feeModel; IInterestModel public interestModel; IInterestOracle public interestOracle; NFT public depositNFT; NFT public fundingNFT; MPHMinter public mphMinter; // Events event EDeposit( address indexed sender, uint256 indexed depositID, uint256 amount, uint256 maturationTimestamp, uint256 interestAmount, uint256 mintMPHAmount ); event EWithdraw( address indexed sender, uint256 indexed depositID, uint256 indexed fundingID, bool early, uint256 takeBackMPHAmount ); event EFund( address indexed sender, uint256 indexed fundingID, uint256 deficitAmount, uint256 mintMPHAmount ); event ESetParamAddress( address indexed sender, string indexed paramName, address newValue ); event ESetParamUint( address indexed sender, string indexed paramName, uint256 newValue ); struct DepositLimit { uint256 MinDepositPeriod; uint256 MaxDepositPeriod; uint256 MinDepositAmount; uint256 MaxDepositAmount; } constructor( DepositLimit memory _depositLimit, address _moneyMarket, // Address of IMoneyMarket that's used for generating interest (owner must be set to this DInterest contract) address _stablecoin, // Address of the stablecoin used to store funds address _feeModel, // Address of the FeeModel contract that determines how fees are charged address _interestModel, // Address of the InterestModel contract that determines how much interest to offer address _interestOracle, // Address of the InterestOracle contract that provides the average interest rate address _depositNFT, // Address of the NFT representing ownership of deposits (owner must be set to this DInterest contract) address _fundingNFT, // Address of the NFT representing ownership of fundings (owner must be set to this DInterest contract) address _mphMinter // Address of the contract for handling minting MPH to users ) public { // Verify input addresses require( _moneyMarket.isContract() && _stablecoin.isContract() && _feeModel.isContract() && _interestModel.isContract() && _interestOracle.isContract() && _depositNFT.isContract() && _fundingNFT.isContract() && _mphMinter.isContract(), "DInterest: An input address is not a contract" ); moneyMarket = IMoneyMarket(_moneyMarket); stablecoin = ERC20(_stablecoin); feeModel = IFeeModel(_feeModel); interestModel = IInterestModel(_interestModel); interestOracle = IInterestOracle(_interestOracle); depositNFT = NFT(_depositNFT); fundingNFT = NFT(_fundingNFT); mphMinter = MPHMinter(_mphMinter); // Ensure moneyMarket uses the same stablecoin require( moneyMarket.stablecoin() == _stablecoin, "DInterest: moneyMarket.stablecoin() != _stablecoin" ); // Ensure interestOracle uses the same moneyMarket require( interestOracle.moneyMarket() == _moneyMarket, "DInterest: interestOracle.moneyMarket() != _moneyMarket" ); // Verify input uint256 parameters require( _depositLimit.MaxDepositPeriod > 0 && _depositLimit.MaxDepositAmount > 0, "DInterest: An input uint256 is 0" ); require( _depositLimit.MinDepositPeriod <= _depositLimit.MaxDepositPeriod, "DInterest: Invalid DepositPeriod range" ); require( _depositLimit.MinDepositAmount <= _depositLimit.MaxDepositAmount, "DInterest: Invalid DepositAmount range" ); MinDepositPeriod = _depositLimit.MinDepositPeriod; MaxDepositPeriod = _depositLimit.MaxDepositPeriod; MinDepositAmount = _depositLimit.MinDepositAmount; MaxDepositAmount = _depositLimit.MaxDepositAmount; totalDeposit = 0; } /** Public actions */ function deposit(uint256 amount, uint256 maturationTimestamp) external nonReentrant { _deposit(amount, maturationTimestamp); } function withdraw(uint256 depositID, uint256 fundingID) external nonReentrant { _withdraw(depositID, fundingID, false); } function earlyWithdraw(uint256 depositID, uint256 fundingID) external nonReentrant { _withdraw(depositID, fundingID, true); } function multiDeposit( uint256[] calldata amountList, uint256[] calldata maturationTimestampList ) external nonReentrant { require( amountList.length == maturationTimestampList.length, "DInterest: List lengths unequal" ); for (uint256 i = 0; i < amountList.length; i = i.add(1)) { _deposit(amountList[i], maturationTimestampList[i]); } } function multiWithdraw( uint256[] calldata depositIDList, uint256[] calldata fundingIDList ) external nonReentrant { require( depositIDList.length == fundingIDList.length, "DInterest: List lengths unequal" ); for (uint256 i = 0; i < depositIDList.length; i = i.add(1)) { _withdraw(depositIDList[i], fundingIDList[i], false); } } function multiEarlyWithdraw( uint256[] calldata depositIDList, uint256[] calldata fundingIDList ) external nonReentrant { require( depositIDList.length == fundingIDList.length, "DInterest: List lengths unequal" ); for (uint256 i = 0; i < depositIDList.length; i = i.add(1)) { _withdraw(depositIDList[i], fundingIDList[i], true); } } /** Deficit funding */ function fundAll() external nonReentrant { // Calculate current deficit (bool isNegative, uint256 deficit) = surplus(); require(isNegative, "DInterest: No deficit available"); require( !depositIsFunded(deposits.length), "DInterest: All deposits funded" ); // Create funding struct uint256 incomeIndex = moneyMarket.incomeIndex(); require(incomeIndex > 0, "DInterest: incomeIndex == 0"); fundingList.push( Funding({ fromDepositID: latestFundedDepositID, toDepositID: deposits.length, recordedFundedDepositAmount: unfundedUserDepositAmount, recordedMoneyMarketIncomeIndex: incomeIndex }) ); // Update relevant values latestFundedDepositID = deposits.length; unfundedUserDepositAmount = 0; _fund(deficit); } function fundMultiple(uint256 toDepositID) external nonReentrant { require( toDepositID > latestFundedDepositID, "DInterest: Deposits already funded" ); require( toDepositID <= deposits.length, "DInterest: Invalid toDepositID" ); (bool isNegative, uint256 surplus) = surplus(); require(isNegative, "DInterest: No deficit available"); uint256 totalDeficit = 0; uint256 totalSurplus = 0; uint256 totalDepositToFund = 0; // Deposits with ID [latestFundedDepositID+1, toDepositID] will be funded for ( uint256 id = latestFundedDepositID.add(1); id <= toDepositID; id = id.add(1) ) { Deposit storage depositEntry = _getDeposit(id); if (depositEntry.active) { // Deposit still active, use current surplus (isNegative, surplus) = surplusOfDeposit(id); } else { // Deposit has been withdrawn, use recorded final surplus (isNegative, surplus) = ( depositEntry.finalSurplusIsNegative, depositEntry.finalSurplusAmount ); } if (isNegative) { // Add on deficit to total totalDeficit = totalDeficit.add(surplus); } else { // Has surplus totalSurplus = totalSurplus.add(surplus); } if (depositEntry.active) { totalDepositToFund = totalDepositToFund.add( depositEntry.amount ); } } if (totalSurplus >= totalDeficit) { // Deposits selected have a surplus as a whole, revert revert("DInterest: Selected deposits in surplus"); } else { // Deduct surplus from totalDeficit totalDeficit = totalDeficit.sub(totalSurplus); } // Create funding struct uint256 incomeIndex = moneyMarket.incomeIndex(); require(incomeIndex > 0, "DInterest: incomeIndex == 0"); fundingList.push( Funding({ fromDepositID: latestFundedDepositID, toDepositID: toDepositID, recordedFundedDepositAmount: totalDepositToFund, recordedMoneyMarketIncomeIndex: incomeIndex }) ); // Update relevant values latestFundedDepositID = toDepositID; unfundedUserDepositAmount = unfundedUserDepositAmount.sub( totalDepositToFund ); _fund(totalDeficit); } /** Public getters */ function calculateInterestAmount( uint256 depositAmount, uint256 depositPeriodInSeconds ) public returns (uint256 interestAmount) { (, uint256 moneyMarketInterestRatePerSecond) = interestOracle .updateAndQuery(); (bool surplusIsNegative, uint256 surplusAmount) = surplus(); return interestModel.calculateInterestAmount( depositAmount, depositPeriodInSeconds, moneyMarketInterestRatePerSecond, surplusIsNegative, surplusAmount ); } function surplus() public returns (bool isNegative, uint256 surplusAmount) { uint256 totalValue = moneyMarket.totalValue(); uint256 totalOwed = totalDeposit.add(totalInterestOwed); if (totalValue >= totalOwed) { // Locked value more than owed deposits, positive surplus isNegative = false; surplusAmount = totalValue.sub(totalOwed); } else { // Locked value less than owed deposits, negative surplus isNegative = true; surplusAmount = totalOwed.sub(totalValue); } } function surplusOfDeposit(uint256 depositID) public returns (bool isNegative, uint256 surplusAmount) { Deposit storage depositEntry = _getDeposit(depositID); uint256 currentMoneyMarketIncomeIndex = moneyMarket.incomeIndex(); uint256 currentDepositValue = depositEntry .amount .mul(currentMoneyMarketIncomeIndex) .div(depositEntry.initialMoneyMarketIncomeIndex); uint256 owed = depositEntry.amount.add(depositEntry.interestOwed); if (currentDepositValue >= owed) { // Locked value more than owed deposits, positive surplus isNegative = false; surplusAmount = currentDepositValue.sub(owed); } else { // Locked value less than owed deposits, negative surplus isNegative = true; surplusAmount = owed.sub(currentDepositValue); } } function depositIsFunded(uint256 id) public view returns (bool) { return (id <= latestFundedDepositID); } function depositsLength() external view returns (uint256) { return deposits.length; } function fundingListLength() external view returns (uint256) { return fundingList.length; } function getDeposit(uint256 depositID) external view returns (Deposit memory) { return deposits[depositID.sub(1)]; } function getFunding(uint256 fundingID) external view returns (Funding memory) { return fundingList[fundingID.sub(1)]; } function moneyMarketIncomeIndex() external returns (uint256) { return moneyMarket.incomeIndex(); } /** Param setters */ function setFeeModel(address newValue) external onlyOwner { require(newValue.isContract(), "DInterest: not contract"); feeModel = IFeeModel(newValue); emit ESetParamAddress(msg.sender, "feeModel", newValue); } function setInterestModel(address newValue) external onlyOwner { require(newValue.isContract(), "DInterest: not contract"); interestModel = IInterestModel(newValue); emit ESetParamAddress(msg.sender, "interestModel", newValue); } function setInterestOracle(address newValue) external onlyOwner { require(newValue.isContract(), "DInterest: not contract"); interestOracle = IInterestOracle(newValue); emit ESetParamAddress(msg.sender, "interestOracle", newValue); } function setRewards(address newValue) external onlyOwner { require(newValue.isContract(), "DInterest: not contract"); moneyMarket.setRewards(newValue); emit ESetParamAddress(msg.sender, "moneyMarket.rewards", newValue); } function setMinDepositPeriod(uint256 newValue) external onlyOwner { require(newValue <= MaxDepositPeriod, "DInterest: invalid value"); MinDepositPeriod = newValue; emit ESetParamUint(msg.sender, "MinDepositPeriod", newValue); } function setMaxDepositPeriod(uint256 newValue) external onlyOwner { require( newValue >= MinDepositPeriod && newValue > 0, "DInterest: invalid value" ); MaxDepositPeriod = newValue; emit ESetParamUint(msg.sender, "MaxDepositPeriod", newValue); } function setMinDepositAmount(uint256 newValue) external onlyOwner { require(newValue <= MaxDepositAmount, "DInterest: invalid value"); MinDepositAmount = newValue; emit ESetParamUint(msg.sender, "MinDepositAmount", newValue); } function setMaxDepositAmount(uint256 newValue) external onlyOwner { require( newValue >= MinDepositAmount && newValue > 0, "DInterest: invalid value" ); MaxDepositAmount = newValue; emit ESetParamUint(msg.sender, "MaxDepositAmount", newValue); } function setDepositNFTTokenURI(uint256 tokenId, string calldata newURI) external onlyOwner { depositNFT.setTokenURI(tokenId, newURI); } function setDepositNFTBaseURI(string calldata newURI) external onlyOwner { depositNFT.setBaseURI(newURI); } function setDepositNFTContractURI(string calldata newURI) external onlyOwner { depositNFT.setContractURI(newURI); } function setFundingNFTTokenURI(uint256 tokenId, string calldata newURI) external onlyOwner { fundingNFT.setTokenURI(tokenId, newURI); } function setFundingNFTBaseURI(string calldata newURI) external onlyOwner { fundingNFT.setBaseURI(newURI); } function setFundingNFTContractURI(string calldata newURI) external onlyOwner { fundingNFT.setContractURI(newURI); } /** Internal getters */ function _getDeposit(uint256 depositID) internal view returns (Deposit storage) { return deposits[depositID.sub(1)]; } function _getFunding(uint256 fundingID) internal view returns (Funding storage) { return fundingList[fundingID.sub(1)]; } /** Internals */ function _deposit(uint256 amount, uint256 maturationTimestamp) internal { // Cannot deposit 0 require(amount > 0, "DInterest: Deposit amount is 0"); // Ensure deposit amount is not more than maximum require( amount >= MinDepositAmount && amount <= MaxDepositAmount, "DInterest: Deposit amount out of range" ); // Ensure deposit period is at least MinDepositPeriod uint256 depositPeriod = maturationTimestamp.sub(now); require( depositPeriod >= MinDepositPeriod && depositPeriod <= MaxDepositPeriod, "DInterest: Deposit period out of range" ); // Update totalDeposit totalDeposit = totalDeposit.add(amount); // Update funding related data uint256 id = deposits.length.add(1); unfundedUserDepositAmount = unfundedUserDepositAmount.add(amount); // Calculate interest uint256 interestAmount = calculateInterestAmount(amount, depositPeriod); require(interestAmount > 0, "DInterest: interestAmount == 0"); // Update totalInterestOwed totalInterestOwed = totalInterestOwed.add(interestAmount); // Mint MPH for msg.sender uint256 mintMPHAmount = mphMinter.mintDepositorReward( msg.sender, interestAmount ); // Record deposit data for `msg.sender` deposits.push( Deposit({ amount: amount, maturationTimestamp: maturationTimestamp, interestOwed: interestAmount, initialMoneyMarketIncomeIndex: moneyMarket.incomeIndex(), active: true, finalSurplusIsNegative: false, finalSurplusAmount: 0, mintMPHAmount: mintMPHAmount }) ); // Transfer `amount` stablecoin to DInterest stablecoin.safeTransferFrom(msg.sender, address(this), amount); // Lend `amount` stablecoin to money market stablecoin.safeIncreaseAllowance(address(moneyMarket), amount); moneyMarket.deposit(amount); // Mint depositNFT depositNFT.mint(msg.sender, id); // Emit event emit EDeposit( msg.sender, id, amount, maturationTimestamp, interestAmount, mintMPHAmount ); } function _withdraw( uint256 depositID, uint256 fundingID, bool early ) internal { Deposit storage depositEntry = _getDeposit(depositID); // Verify deposit is active and set to inactive require(depositEntry.active, "DInterest: Deposit not active"); depositEntry.active = false; if (early) { // Verify `now < depositEntry.maturationTimestamp` require( now < depositEntry.maturationTimestamp, "DInterest: Deposit mature, use withdraw() instead" ); } else { // Verify `now >= depositEntry.maturationTimestamp` require( now >= depositEntry.maturationTimestamp, "DInterest: Deposit not mature" ); } // Verify msg.sender owns the depositNFT require( depositNFT.ownerOf(depositID) == msg.sender, "DInterest: Sender doesn't own depositNFT" ); // Take back MPH uint256 takeBackMPHAmount = mphMinter.takeBackDepositorReward( msg.sender, depositEntry.mintMPHAmount, early ); // Update totalDeposit totalDeposit = totalDeposit.sub(depositEntry.amount); // Update totalInterestOwed totalInterestOwed = totalInterestOwed.sub(depositEntry.interestOwed); // Burn depositNFT depositNFT.burn(depositID); uint256 feeAmount; uint256 withdrawAmount; if (early) { // Withdraw the principal of the deposit from money market withdrawAmount = depositEntry.amount; } else { // Withdraw the principal & the interest from money market feeAmount = feeModel.getFee(depositEntry.interestOwed); withdrawAmount = depositEntry.amount.add(depositEntry.interestOwed); } withdrawAmount = moneyMarket.withdraw(withdrawAmount); (bool depositIsNegative, uint256 depositSurplus) = surplusOfDeposit( depositID ); // If deposit was funded, payout interest to funder if (depositIsFunded(depositID)) { Funding storage f = _getFunding(fundingID); require( depositID > f.fromDepositID && depositID <= f.toDepositID, "DInterest: Deposit not funded by fundingID" ); uint256 currentMoneyMarketIncomeIndex = moneyMarket.incomeIndex(); require( currentMoneyMarketIncomeIndex > 0, "DInterest: currentMoneyMarketIncomeIndex == 0" ); uint256 interestAmount = f .recordedFundedDepositAmount .mul(currentMoneyMarketIncomeIndex) .div(f.recordedMoneyMarketIncomeIndex) .sub(f.recordedFundedDepositAmount); // Update funding values f.recordedFundedDepositAmount = f.recordedFundedDepositAmount.sub( depositEntry.amount ); f.recordedMoneyMarketIncomeIndex = currentMoneyMarketIncomeIndex; // Send interest to funder uint256 transferToFunderAmount = (early && depositIsNegative) ? interestAmount.add(depositSurplus) : interestAmount; if (transferToFunderAmount > 0) { transferToFunderAmount = moneyMarket.withdraw( transferToFunderAmount ); stablecoin.safeTransfer( fundingNFT.ownerOf(fundingID), transferToFunderAmount ); } } else { // Remove deposit from future deficit fundings unfundedUserDepositAmount = unfundedUserDepositAmount.sub( depositEntry.amount ); // Record remaining surplus depositEntry.finalSurplusIsNegative = depositIsNegative; depositEntry.finalSurplusAmount = depositSurplus; } // Send `withdrawAmount - feeAmount` stablecoin to `msg.sender` stablecoin.safeTransfer(msg.sender, withdrawAmount.sub(feeAmount)); // Send `feeAmount` stablecoin to feeModel beneficiary stablecoin.safeTransfer(feeModel.beneficiary(), feeAmount); // Emit event emit EWithdraw( msg.sender, depositID, fundingID, early, takeBackMPHAmount ); } function _fund(uint256 totalDeficit) internal { // Transfer `totalDeficit` stablecoins from msg.sender stablecoin.safeTransferFrom(msg.sender, address(this), totalDeficit); // Deposit `totalDeficit` stablecoins into moneyMarket stablecoin.safeIncreaseAllowance(address(moneyMarket), totalDeficit); moneyMarket.deposit(totalDeficit); // Mint fundingNFT fundingNFT.mint(msg.sender, fundingList.length); // Mint MPH for msg.sender uint256 mintMPHAmount = mphMinter.mintFunderReward( msg.sender, totalDeficit ); // Emit event uint256 fundingID = fundingList.length; emit EFund(msg.sender, fundingID, totalDeficit, mintMPHAmount); } } library DecMath { using SafeMath for uint256; uint256 internal constant PRECISION = 10**18; function decmul(uint256 a, uint256 b) internal pure returns (uint256) { return a.mul(b).div(PRECISION); } function decdiv(uint256 a, uint256 b) internal pure returns (uint256) { return a.mul(PRECISION).div(b); } } contract ComptrollerMock { uint256 public constant CLAIM_AMOUNT = 10**18; ERC20Mock public comp; constructor (address _comp) public { comp = ERC20Mock(_comp); } function claimComp(address holder) external { comp.mint(holder, CLAIM_AMOUNT); } function getCompAddress() external view returns (address) { return address(comp); } } contract LendingPoolAddressesProviderMock { address internal pool; address internal core; function getLendingPool() external view returns (address) { return pool; } function setLendingPoolImpl(address _pool) external { pool = _pool; } function getLendingPoolCore() external view returns (address) { return core; } function setLendingPoolCoreImpl(address _pool) external { core = _pool; } } contract LendingPoolCoreMock { LendingPoolMock internal lendingPool; function setLendingPool(address lendingPoolAddress) public { lendingPool = LendingPoolMock(lendingPoolAddress); } function bounceTransfer(address _reserve, address _sender, uint256 _amount) external { ERC20 token = ERC20(_reserve); token.transferFrom(_sender, address(this), _amount); token.transfer(msg.sender, _amount); } // The equivalent of exchangeRateStored() for Compound cTokens function getReserveNormalizedIncome(address _reserve) external view returns (uint256) { (, , , , , , , , , , , address aTokenAddress, ) = lendingPool .getReserveData(_reserve); ATokenMock aToken = ATokenMock(aTokenAddress); return aToken.normalizedIncome(); } } contract LendingPoolMock { mapping(address => address) internal reserveAToken; LendingPoolCoreMock public core; constructor(address _core) public { core = LendingPoolCoreMock(_core); } function setReserveAToken(address _reserve, address _aTokenAddress) external { reserveAToken[_reserve] = _aTokenAddress; } function deposit(address _reserve, uint256 _amount, uint16) external { ERC20 token = ERC20(_reserve); core.bounceTransfer(_reserve, msg.sender, _amount); // Mint aTokens address aTokenAddress = reserveAToken[_reserve]; ATokenMock aToken = ATokenMock(aTokenAddress); aToken.mint(msg.sender, _amount); token.transfer(aTokenAddress, _amount); } function getReserveData(address _reserve) external view returns ( uint256, uint256, uint256, uint256, uint256 liquidityRate, uint256, uint256, uint256, uint256, uint256, uint256, address aTokenAddress, uint40 ) { aTokenAddress = reserveAToken[_reserve]; ATokenMock aToken = ATokenMock(aTokenAddress); liquidityRate = aToken.liquidityRate(); } } interface IFeeModel { function beneficiary() external view returns (address payable); function getFee(uint256 _txAmount) external pure returns (uint256 _feeAmount); } contract PercentageFeeModel is IFeeModel { using SafeMath for uint256; address payable public beneficiary; constructor(address payable _beneficiary) public { beneficiary = _beneficiary; } function getFee(uint256 _txAmount) external pure returns (uint256 _feeAmount) { _feeAmount = _txAmount.div(10); // Precision is decreased by 1 decimal place } } interface IInterestOracle { function updateAndQuery() external returns (bool updated, uint256 value); function query() external view returns (uint256 value); function moneyMarket() external view returns (address); } interface IInterestModel { function calculateInterestAmount( uint256 depositAmount, uint256 depositPeriodInSeconds, uint256 moneyMarketInterestRatePerSecond, bool surplusIsNegative, uint256 surplusAmount ) external view returns (uint256 interestAmount); } contract LinearInterestModel { using SafeMath for uint256; using DecMath for uint256; uint256 public constant PRECISION = 10**18; uint256 public IRMultiplier; constructor(uint256 _IRMultiplier) public { IRMultiplier = _IRMultiplier; } function calculateInterestAmount( uint256 depositAmount, uint256 depositPeriodInSeconds, uint256 moneyMarketInterestRatePerSecond, bool, /*surplusIsNegative*/ uint256 /*surplusAmount*/ ) external view returns (uint256 interestAmount) { // interestAmount = depositAmount * moneyMarketInterestRatePerSecond * IRMultiplier * depositPeriodInSeconds interestAmount = depositAmount .mul(PRECISION) .decmul(moneyMarketInterestRatePerSecond) .decmul(IRMultiplier) .mul(depositPeriodInSeconds) .div(PRECISION); } } interface IMoneyMarket { function deposit(uint256 amount) external; function withdraw(uint256 amountInUnderlying) external returns (uint256 actualAmountWithdrawn); function claimRewards() external; // Claims farmed tokens (e.g. COMP, CRV) and sends it to the rewards pool function totalValue() external returns (uint256); // The total value locked in the money market, in terms of the underlying stablecoin function incomeIndex() external returns (uint256); // Used for calculating the interest generated (e.g. cDai's price for the Compound market) function stablecoin() external view returns (address); function setRewards(address newValue) external; event ESetParamAddress( address indexed sender, string indexed paramName, address newValue ); } contract AaveMarket is IMoneyMarket, Ownable { using SafeMath for uint256; using SafeERC20 for ERC20; using Address for address; uint16 internal constant REFERRALCODE = 20; // Aave referral program code ILendingPoolAddressesProvider public provider; // Used for fetching the current address of LendingPool ERC20 public stablecoin; constructor(address _provider, address _stablecoin) public { // Verify input addresses require( _provider != address(0) && _stablecoin != address(0), "AaveMarket: An input address is 0" ); require( _provider.isContract() && _stablecoin.isContract(), "AaveMarket: An input address is not a contract" ); provider = ILendingPoolAddressesProvider(_provider); stablecoin = ERC20(_stablecoin); } function deposit(uint256 amount) external onlyOwner { require(amount > 0, "AaveMarket: amount is 0"); ILendingPool lendingPool = ILendingPool(provider.getLendingPool()); address lendingPoolCore = provider.getLendingPoolCore(); // Transfer `amount` stablecoin from `msg.sender` stablecoin.safeTransferFrom(msg.sender, address(this), amount); // Approve `amount` stablecoin to lendingPool stablecoin.safeIncreaseAllowance(lendingPoolCore, amount); // Deposit `amount` stablecoin to lendingPool lendingPool.deposit(address(stablecoin), amount, REFERRALCODE); } function withdraw(uint256 amountInUnderlying) external onlyOwner returns (uint256 actualAmountWithdrawn) { require(amountInUnderlying > 0, "AaveMarket: amountInUnderlying is 0"); ILendingPool lendingPool = ILendingPool(provider.getLendingPool()); // Initialize aToken (, , , , , , , , , , , address aTokenAddress, ) = lendingPool .getReserveData(address(stablecoin)); IAToken aToken = IAToken(aTokenAddress); // Redeem `amountInUnderlying` aToken, since 1 aToken = 1 stablecoin aToken.redeem(amountInUnderlying); // Transfer `amountInUnderlying` stablecoin to `msg.sender` stablecoin.safeTransfer(msg.sender, amountInUnderlying); return amountInUnderlying; } function claimRewards() external {} function totalValue() external returns (uint256) { ILendingPool lendingPool = ILendingPool(provider.getLendingPool()); // Initialize aToken (, , , , , , , , , , , address aTokenAddress, ) = lendingPool .getReserveData(address(stablecoin)); IAToken aToken = IAToken(aTokenAddress); return aToken.balanceOf(address(this)); } function incomeIndex() external returns (uint256) { ILendingPoolCore lendingPoolCore = ILendingPoolCore( provider.getLendingPoolCore() ); return lendingPoolCore.getReserveNormalizedIncome(address(stablecoin)); } function setRewards(address newValue) external {} } interface IAToken { function redeem(uint256 _amount) external; function balanceOf(address owner) external view returns (uint256); } interface ILendingPool { function deposit(address _reserve, uint256 _amount, uint16 _referralCode) external; function getReserveData(address _reserve) external view returns ( uint256 totalLiquidity, uint256 availableLiquidity, uint256 totalBorrowsStable, uint256 totalBorrowsVariable, uint256 liquidityRate, uint256 variableBorrowRate, uint256 stableBorrowRate, uint256 averageStableBorrowRate, uint256 utilizationRate, uint256 liquidityIndex, uint256 variableBorrowIndex, address aTokenAddress, uint40 lastUpdateTimestamp ); } interface ILendingPoolAddressesProvider { function getLendingPool() external view returns (address); function setLendingPoolImpl(address _pool) external; function getLendingPoolCore() external view returns (address payable); function setLendingPoolCoreImpl(address _lendingPoolCore) external; function getLendingPoolConfigurator() external view returns (address); function setLendingPoolConfiguratorImpl(address _configurator) external; function getLendingPoolDataProvider() external view returns (address); function setLendingPoolDataProviderImpl(address _provider) external; function getLendingPoolParametersProvider() external view returns (address); function setLendingPoolParametersProviderImpl(address _parametersProvider) external; function getTokenDistributor() external view returns (address); function setTokenDistributor(address _tokenDistributor) external; function getFeeProvider() external view returns (address); function setFeeProviderImpl(address _feeProvider) external; function getLendingPoolLiquidationManager() external view returns (address); function setLendingPoolLiquidationManager(address _manager) external; function getLendingPoolManager() external view returns (address); function setLendingPoolManager(address _lendingPoolManager) external; function getPriceOracle() external view returns (address); function setPriceOracle(address _priceOracle) external; function getLendingRateOracle() external view returns (address); function setLendingRateOracle(address _lendingRateOracle) external; } interface ILendingPoolCore { // The equivalent of exchangeRateStored() for Compound cTokens function getReserveNormalizedIncome(address _reserve) external view returns (uint256); } contract CompoundERC20Market is IMoneyMarket, Ownable { using DecMath for uint256; using SafeERC20 for ERC20; using Address for address; uint256 internal constant ERRCODE_OK = 0; ICERC20 public cToken; IComptroller public comptroller; address public rewards; ERC20 public stablecoin; constructor( address _cToken, address _comptroller, address _rewards, address _stablecoin ) public { // Verify input addresses require( _cToken != address(0) && _comptroller != address(0) && _rewards != address(0) && _stablecoin != address(0), "CompoundERC20Market: An input address is 0" ); require( _cToken.isContract() && _comptroller.isContract() && _rewards.isContract() && _stablecoin.isContract(), "CompoundERC20Market: An input address is not a contract" ); cToken = ICERC20(_cToken); comptroller = IComptroller(_comptroller); rewards = _rewards; stablecoin = ERC20(_stablecoin); } function deposit(uint256 amount) external onlyOwner { require(amount > 0, "CompoundERC20Market: amount is 0"); // Transfer `amount` stablecoin from `msg.sender` stablecoin.safeTransferFrom(msg.sender, address(this), amount); // Deposit `amount` stablecoin into cToken stablecoin.safeIncreaseAllowance(address(cToken), amount); require( cToken.mint(amount) == ERRCODE_OK, "CompoundERC20Market: Failed to mint cTokens" ); } function withdraw(uint256 amountInUnderlying) external onlyOwner returns (uint256 actualAmountWithdrawn) { require( amountInUnderlying > 0, "CompoundERC20Market: amountInUnderlying is 0" ); // Withdraw `amountInUnderlying` stablecoin from cToken require( cToken.redeemUnderlying(amountInUnderlying) == ERRCODE_OK, "CompoundERC20Market: Failed to redeem" ); // Transfer `amountInUnderlying` stablecoin to `msg.sender` stablecoin.safeTransfer(msg.sender, amountInUnderlying); return amountInUnderlying; } function claimRewards() external { comptroller.claimComp(address(this)); ERC20 comp = ERC20(comptroller.getCompAddress()); comp.safeTransfer(rewards, comp.balanceOf(address(this))); } function totalValue() external returns (uint256) { uint256 cTokenBalance = cToken.balanceOf(address(this)); // Amount of stablecoin units that 1 unit of cToken can be exchanged for, scaled by 10^18 uint256 cTokenPrice = cToken.exchangeRateCurrent(); return cTokenBalance.decmul(cTokenPrice); } function incomeIndex() external returns (uint256) { return cToken.exchangeRateCurrent(); } /** Param setters */ function setRewards(address newValue) external onlyOwner { require(newValue.isContract(), "CompoundERC20Market: not contract"); rewards = newValue; emit ESetParamAddress(msg.sender, "rewards", newValue); } } interface ICERC20 { function transfer(address dst, uint256 amount) external returns (bool); function transferFrom(address src, address dst, uint256 amount) external returns (bool); function approve(address spender, uint256 amount) external returns (bool); function allowance(address owner, address spender) external view returns (uint256); function balanceOf(address owner) external view returns (uint256); function balanceOfUnderlying(address owner) external returns (uint256); function getAccountSnapshot(address account) external view returns (uint256, uint256, uint256, uint256); function borrowRatePerBlock() external view returns (uint256); function supplyRatePerBlock() external view returns (uint256); function totalBorrowsCurrent() external returns (uint256); function borrowBalanceCurrent(address account) external returns (uint256); function borrowBalanceStored(address account) external view returns (uint256); function exchangeRateCurrent() external returns (uint256); function exchangeRateStored() external view returns (uint256); function getCash() external view returns (uint256); function accrueInterest() external returns (uint256); function seize(address liquidator, address borrower, uint256 seizeTokens) external returns (uint256); function mint(uint256 mintAmount) external returns (uint256); function redeem(uint256 redeemTokens) external returns (uint256); function redeemUnderlying(uint256 redeemAmount) external returns (uint256); function borrow(uint256 borrowAmount) external returns (uint256); function repayBorrow(uint256 repayAmount) external returns (uint256); function repayBorrowBehalf(address borrower, uint256 repayAmount) external returns (uint256); function liquidateBorrow( address borrower, uint256 repayAmount, address cTokenCollateral ) external returns (uint256); } interface IComptroller { function claimComp(address holder) external; function getCompAddress() external view returns (address); } contract YVaultMarket is IMoneyMarket, Ownable { using SafeMath for uint256; using DecMath for uint256; using SafeERC20 for ERC20; using Address for address; Vault public vault; ERC20 public stablecoin; constructor(address _vault, address _stablecoin) public { // Verify input addresses require( _vault != address(0) && _stablecoin != address(0), "YVaultMarket: An input address is 0" ); require( _vault.isContract() && _stablecoin.isContract(), "YVaultMarket: An input address is not a contract" ); vault = Vault(_vault); stablecoin = ERC20(_stablecoin); } function deposit(uint256 amount) external onlyOwner { require(amount > 0, "YVaultMarket: amount is 0"); // Transfer `amount` stablecoin from `msg.sender` stablecoin.safeTransferFrom(msg.sender, address(this), amount); // Approve `amount` stablecoin to vault stablecoin.safeIncreaseAllowance(address(vault), amount); // Deposit `amount` stablecoin to vault vault.deposit(amount); } function withdraw(uint256 amountInUnderlying) external onlyOwner returns (uint256 actualAmountWithdrawn) { require( amountInUnderlying > 0, "YVaultMarket: amountInUnderlying is 0" ); // Withdraw `amountInShares` shares from vault uint256 sharePrice = vault.getPricePerFullShare(); uint256 amountInShares = amountInUnderlying.decdiv(sharePrice); vault.withdraw(amountInShares); // Transfer stablecoin to `msg.sender` actualAmountWithdrawn = stablecoin.balanceOf(address(this)); stablecoin.safeTransfer(msg.sender, actualAmountWithdrawn); } function claimRewards() external {} function totalValue() external returns (uint256) { uint256 sharePrice = vault.getPricePerFullShare(); uint256 shareBalance = vault.balanceOf(address(this)); return shareBalance.decmul(sharePrice); } function incomeIndex() external returns (uint256) { return vault.getPricePerFullShare(); } function setRewards(address newValue) external {} } interface Vault { function deposit(uint256) external; function withdraw(uint256) external; function getPricePerFullShare() external view returns (uint256); /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom( address sender, address recipient, uint256 amount ) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval( address indexed owner, address indexed spender, uint256 value ); } interface IRewards { function notifyRewardAmount(uint256 reward) external; } contract MPHMinter is Ownable { using Address for address; using DecMath for uint256; using SafeMath for uint256; uint256 internal constant PRECISION = 10**18; /** @notice The multiplier applied to the interest generated by a pool when minting MPH */ mapping(address => uint256) public poolMintingMultiplier; /** @notice The multiplier applied to the interest generated by a pool when letting depositors keep MPH */ mapping(address => uint256) public poolDepositorRewardMultiplier; /** @notice The multiplier applied to the interest generated by a pool when letting deficit funders keep MPH */ mapping(address => uint256) public poolFunderRewardMultiplier; /** @notice Multiplier used for calculating dev reward */ uint256 public devRewardMultiplier; event ESetParamAddress( address indexed sender, string indexed paramName, address newValue ); event ESetParamUint( address indexed sender, string indexed paramName, uint256 newValue ); /** External contracts */ MPHToken public mph; address public govTreasury; address public devWallet; constructor( address _mph, address _govTreasury, address _devWallet, uint256 _devRewardMultiplier ) public { mph = MPHToken(_mph); govTreasury = _govTreasury; devWallet = _devWallet; devRewardMultiplier = _devRewardMultiplier; } function mintDepositorReward(address to, uint256 interestAmount) external returns (uint256) { uint256 multiplier = poolMintingMultiplier[msg.sender]; uint256 mintAmount = interestAmount.decmul(multiplier); if (mintAmount == 0) { // sender is not a pool/has been deactivated return 0; } mph.ownerMint(to, mintAmount); mph.ownerMint(devWallet, mintAmount.decmul(devRewardMultiplier)); return mintAmount; } function mintFunderReward(address to, uint256 interestAmount) external returns (uint256) { uint256 multiplier = poolMintingMultiplier[msg.sender].decmul( poolFunderRewardMultiplier[msg.sender] ); uint256 mintAmount = interestAmount.decmul(multiplier); if (mintAmount == 0) { // sender is not a pool/has been deactivated return 0; } mph.ownerMint(to, mintAmount); mph.ownerMint(devWallet, mintAmount.decmul(devRewardMultiplier)); return mintAmount; } function takeBackDepositorReward( address from, uint256 mintMPHAmount, bool early ) external returns (uint256) { uint256 takeBackAmount = early ? mintMPHAmount : mintMPHAmount.decmul( PRECISION.sub(poolDepositorRewardMultiplier[msg.sender]) ); if (takeBackAmount == 0) { // sender is not a pool/has been deactivated return 0; } mph.ownerTransfer(from, govTreasury, takeBackAmount); return takeBackAmount; } /** Param setters */ function setGovTreasury(address newValue) external onlyOwner { require(newValue != address(0), "MPHMinter: 0 address"); govTreasury = newValue; emit ESetParamAddress(msg.sender, "govTreasury", newValue); } function setDevWallet(address newValue) external onlyOwner { require(newValue != address(0), "MPHMinter: 0 address"); devWallet = newValue; emit ESetParamAddress(msg.sender, "devWallet", newValue); } function setPoolMintingMultiplier(address pool, uint256 newMultiplier) external onlyOwner { require(pool.isContract(), "MPHMinter: pool not contract"); poolMintingMultiplier[pool] = newMultiplier; emit ESetParamUint(msg.sender, "poolMintingMultiplier", newMultiplier); } function setPoolDepositorRewardMultiplier( address pool, uint256 newMultiplier ) external onlyOwner { require(pool.isContract(), "MPHMinter: pool not contract"); require(newMultiplier <= PRECISION, "MPHMinter: invalid multiplier"); poolDepositorRewardMultiplier[pool] = newMultiplier; emit ESetParamUint( msg.sender, "poolDepositorRewardMultiplier", newMultiplier ); } function setPoolFunderRewardMultiplier(address pool, uint256 newMultiplier) external onlyOwner { require(pool.isContract(), "MPHMinter: pool not contract"); poolFunderRewardMultiplier[pool] = newMultiplier; emit ESetParamUint( msg.sender, "poolFunderRewardMultiplier", newMultiplier ); } } interface OneSplitAudit { function swap( address fromToken, address destToken, uint256 amount, uint256 minReturn, uint256[] calldata distribution, uint256 flags ) external payable returns (uint256 returnAmount); function getExpectedReturn( address fromToken, address destToken, uint256 amount, uint256 parts, uint256 flags // See constants in IOneSplit.sol ) external view returns (uint256 returnAmount, uint256[] memory distribution); } contract IRewardDistributionRecipient is Ownable { address rewardDistribution; function notifyRewardAmount(uint256 reward) external; modifier onlyRewardDistribution() { require( _msgSender() == rewardDistribution, "Caller is not reward distribution" ); _; } function setRewardDistribution(address _rewardDistribution) external onlyOwner { rewardDistribution = _rewardDistribution; } } contract LPTokenWrapper { using SafeMath for uint256; using SafeERC20 for IERC20; IERC20 public stakeToken; uint256 private _totalSupply; mapping(address => uint256) private _balances; constructor(address _stakeToken) public { stakeToken = IERC20(_stakeToken); } function totalSupply() public view returns (uint256) { return _totalSupply; } function balanceOf(address account) public view returns (uint256) { return _balances[account]; } function stake(uint256 amount) public { _totalSupply = _totalSupply.add(amount); _balances[msg.sender] = _balances[msg.sender].add(amount); stakeToken.safeTransferFrom(msg.sender, address(this), amount); } function withdraw(uint256 amount) public { _totalSupply = _totalSupply.sub(amount); _balances[msg.sender] = _balances[msg.sender].sub(amount); stakeToken.safeTransfer(msg.sender, amount); } } contract Rewards is LPTokenWrapper, IRewardDistributionRecipient { IERC20 public rewardToken; OneSplitAudit public oneSplit; uint256 public constant DURATION = 7 days; uint256 public starttime; uint256 public periodFinish = 0; uint256 public rewardRate = 0; uint256 public lastUpdateTime; uint256 public rewardPerTokenStored; bool public initialized = false; mapping(address => uint256) public userRewardPerTokenPaid; mapping(address => uint256) public rewards; event RewardAdded(uint256 reward); event Staked(address indexed user, uint256 amount); event Withdrawn(address indexed user, uint256 amount); event RewardPaid(address indexed user, uint256 reward); modifier updateReward(address account) { rewardPerTokenStored = rewardPerToken(); lastUpdateTime = lastTimeRewardApplicable(); if (account != address(0)) { rewards[account] = earned(account); userRewardPerTokenPaid[account] = rewardPerTokenStored; } _; } modifier checkStart { require(block.timestamp >= starttime, "Rewards: not start"); _; } constructor( address _stakeToken, address _rewardToken, address _oneSplit, uint256 _starttime ) public LPTokenWrapper(_stakeToken) { rewardToken = IERC20(_rewardToken); oneSplit = OneSplitAudit(_oneSplit); starttime = _starttime; } function lastTimeRewardApplicable() public view returns (uint256) { return Math.min(block.timestamp, periodFinish); } function rewardPerToken() public view returns (uint256) { if (totalSupply() == 0) { return rewardPerTokenStored; } return rewardPerTokenStored.add( lastTimeRewardApplicable() .sub(lastUpdateTime) .mul(rewardRate) .mul(1e18) .div(totalSupply()) ); } function earned(address account) public view returns (uint256) { return balanceOf(account) .mul(rewardPerToken().sub(userRewardPerTokenPaid[account])) .div(1e18) .add(rewards[account]); } // stake visibility is public as overriding LPTokenWrapper's stake() function function stake(uint256 amount) public updateReward(msg.sender) checkStart { require(amount > 0, "Rewards: cannot stake 0"); super.stake(amount); emit Staked(msg.sender, amount); } function withdraw(uint256 amount) public updateReward(msg.sender) checkStart { require(amount > 0, "Rewards: cannot withdraw 0"); super.withdraw(amount); emit Withdrawn(msg.sender, amount); } function exit() external { withdraw(balanceOf(msg.sender)); getReward(); } function getReward() public updateReward(msg.sender) checkStart { uint256 reward = earned(msg.sender); if (reward > 0) { rewards[msg.sender] = 0; rewardToken.safeTransfer(msg.sender, reward); emit RewardPaid(msg.sender, reward); } } function notifyRewardAmount(uint256 reward) external onlyRewardDistribution updateReward(address(0)) { _notifyRewardAmount(reward); } function dump(address token, uint256 parts) external { require(token != address(stakeToken), "Rewards: no dump stakeToken"); require(token != address(rewardToken), "Rewards: no dump rewardToken"); // dump token for rewardToken uint256 tokenBalance = IERC20(token).balanceOf(address(this)); (uint256 returnAmount, uint256[] memory distribution) = oneSplit .getExpectedReturn( token, address(rewardToken), tokenBalance, parts, 0 ); uint256 receivedRewardTokenAmount = oneSplit.swap( token, address(rewardToken), tokenBalance, returnAmount, distribution, 0 ); // notify reward _notifyRewardAmount(receivedRewardTokenAmount); } function _notifyRewardAmount(uint256 reward) internal { // https://sips.synthetix.io/sips/sip-77 require( reward < uint256(-1) / 10**18, "Rewards: rewards too large, would lock" ); if (block.timestamp > starttime) { if (block.timestamp >= periodFinish) { rewardRate = reward.div(DURATION); } else { uint256 remaining = periodFinish.sub(block.timestamp); uint256 leftover = remaining.mul(rewardRate); rewardRate = reward.add(leftover).div(DURATION); } lastUpdateTime = block.timestamp; periodFinish = block.timestamp.add(DURATION); emit RewardAdded(reward); } else { rewardRate = reward.div(DURATION); lastUpdateTime = starttime; periodFinish = starttime.add(DURATION); emit RewardAdded(reward); } } } contract ERC165 is IERC165 { /* * bytes4(keccak256('supportsInterface(bytes4)')) == 0x01ffc9a7 */ bytes4 private constant _INTERFACE_ID_ERC165 = 0x01ffc9a7; /** * @dev Mapping of interface ids to whether or not it's supported. */ mapping(bytes4 => bool) private _supportedInterfaces; constructor () internal { // Derived contracts need only register support for their own interfaces, // we register support for ERC165 itself here _registerInterface(_INTERFACE_ID_ERC165); } /** * @dev See {IERC165-supportsInterface}. * * Time complexity O(1), guaranteed to always use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool) { return _supportedInterfaces[interfaceId]; } /** * @dev Registers the contract as an implementer of the interface defined by * `interfaceId`. Support of the actual ERC165 interface is automatic and * registering its interface id is not required. * * See {IERC165-supportsInterface}. * * Requirements: * * - `interfaceId` cannot be the ERC165 invalid interface (`0xffffffff`). */ function _registerInterface(bytes4 interfaceId) internal { require(interfaceId != 0xffffffff, "ERC165: invalid interface id"); _supportedInterfaces[interfaceId] = true; } } contract ERC20 is Context, IERC20 { using SafeMath for uint256; mapping (address => uint256) private _balances; mapping (address => mapping (address => uint256)) private _allowances; uint256 private _totalSupply; /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `recipient` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address recipient, uint256 amount) public returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public returns (bool) { _approve(_msgSender(), spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}; * * Requirements: * - `sender` and `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. * - the caller must have allowance for `sender`'s tokens of at least * `amount`. */ function transferFrom(address sender, address recipient, uint256 amount) public returns (bool) { _transfer(sender, recipient, amount); _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance")); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue)); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero")); return true; } /** * @dev Moves tokens `amount` from `sender` to `recipient`. * * This is internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `sender` cannot be the zero address. * - `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. */ function _transfer(address sender, address recipient, uint256 amount) internal { require(sender != address(0), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance"); _balances[recipient] = _balances[recipient].add(amount); emit Transfer(sender, recipient, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements * * - `to` cannot be the zero address. */ function _mint(address account, uint256 amount) internal { require(account != address(0), "ERC20: mint to the zero address"); _totalSupply = _totalSupply.add(amount); _balances[account] = _balances[account].add(amount); emit Transfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal { require(account != address(0), "ERC20: burn from the zero address"); _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance"); _totalSupply = _totalSupply.sub(amount); emit Transfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens. * * This is internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve(address owner, address spender, uint256 amount) internal { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Destroys `amount` tokens from `account`.`amount` is then deducted * from the caller's allowance. * * See {_burn} and {_approve}. */ function _burnFrom(address account, uint256 amount) internal { _burn(account, amount); _approve(account, _msgSender(), _allowances[account][_msgSender()].sub(amount, "ERC20: burn amount exceeds allowance")); } } contract ERC20Detailed is IERC20 { string private _name; string private _symbol; uint8 private _decimals; /** * @dev Sets the values for `name`, `symbol`, and `decimals`. All three of * these values are immutable: they can only be set once during * construction. */ constructor (string memory name, string memory symbol, uint8 decimals) public { _name = name; _symbol = symbol; _decimals = decimals; } /** * @dev Returns the name of the token. */ function name() public view returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5,05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view returns (uint8) { return _decimals; } } contract ERC721 is Context, ERC165, IERC721 { using SafeMath for uint256; using Address for address; using Counters for Counters.Counter; // Equals to `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))` // which can be also obtained as `IERC721Receiver(0).onERC721Received.selector` bytes4 private constant _ERC721_RECEIVED = 0x150b7a02; // Mapping from token ID to owner mapping (uint256 => address) private _tokenOwner; // Mapping from token ID to approved address mapping (uint256 => address) private _tokenApprovals; // Mapping from owner to number of owned token mapping (address => Counters.Counter) private _ownedTokensCount; // Mapping from owner to operator approvals mapping (address => mapping (address => bool)) private _operatorApprovals; /* * bytes4(keccak256('balanceOf(address)')) == 0x70a08231 * bytes4(keccak256('ownerOf(uint256)')) == 0x6352211e * bytes4(keccak256('approve(address,uint256)')) == 0x095ea7b3 * bytes4(keccak256('getApproved(uint256)')) == 0x081812fc * bytes4(keccak256('setApprovalForAll(address,bool)')) == 0xa22cb465 * bytes4(keccak256('isApprovedForAll(address,address)')) == 0xe985e9c5 * bytes4(keccak256('transferFrom(address,address,uint256)')) == 0x23b872dd * bytes4(keccak256('safeTransferFrom(address,address,uint256)')) == 0x42842e0e * bytes4(keccak256('safeTransferFrom(address,address,uint256,bytes)')) == 0xb88d4fde * * => 0x70a08231 ^ 0x6352211e ^ 0x095ea7b3 ^ 0x081812fc ^ * 0xa22cb465 ^ 0xe985e9c ^ 0x23b872dd ^ 0x42842e0e ^ 0xb88d4fde == 0x80ac58cd */ bytes4 private constant _INTERFACE_ID_ERC721 = 0x80ac58cd; constructor () public { // register the supported interfaces to conform to ERC721 via ERC165 _registerInterface(_INTERFACE_ID_ERC721); } /** * @dev Gets the balance of the specified address. * @param owner address to query the balance of * @return uint256 representing the amount owned by the passed address */ function balanceOf(address owner) public view returns (uint256) { require(owner != address(0), "ERC721: balance query for the zero address"); return _ownedTokensCount[owner].current(); } /** * @dev Gets the owner of the specified token ID. * @param tokenId uint256 ID of the token to query the owner of * @return address currently marked as the owner of the given token ID */ function ownerOf(uint256 tokenId) public view returns (address) { address owner = _tokenOwner[tokenId]; require(owner != address(0), "ERC721: owner query for nonexistent token"); return owner; } /** * @dev Approves another address to transfer the given token ID * The zero address indicates there is no approved address. * There can only be one approved address per token at a given time. * Can only be called by the token owner or an approved operator. * @param to address to be approved for the given token ID * @param tokenId uint256 ID of the token to be approved */ function approve(address to, uint256 tokenId) public { address owner = ownerOf(tokenId); require(to != owner, "ERC721: approval to current owner"); require(_msgSender() == owner || isApprovedForAll(owner, _msgSender()), "ERC721: approve caller is not owner nor approved for all" ); _tokenApprovals[tokenId] = to; emit Approval(owner, to, tokenId); } /** * @dev Gets the approved address for a token ID, or zero if no address set * Reverts if the token ID does not exist. * @param tokenId uint256 ID of the token to query the approval of * @return address currently approved for the given token ID */ function getApproved(uint256 tokenId) public view returns (address) { require(_exists(tokenId), "ERC721: approved query for nonexistent token"); return _tokenApprovals[tokenId]; } /** * @dev Sets or unsets the approval of a given operator * An operator is allowed to transfer all tokens of the sender on their behalf. * @param to operator address to set the approval * @param approved representing the status of the approval to be set */ function setApprovalForAll(address to, bool approved) public { require(to != _msgSender(), "ERC721: approve to caller"); _operatorApprovals[_msgSender()][to] = approved; emit ApprovalForAll(_msgSender(), to, approved); } /** * @dev Tells whether an operator is approved by a given owner. * @param owner owner address which you want to query the approval of * @param operator operator address which you want to query the approval of * @return bool whether the given operator is approved by the given owner */ function isApprovedForAll(address owner, address operator) public view returns (bool) { return _operatorApprovals[owner][operator]; } /** * @dev Transfers the ownership of a given token ID to another address. * Usage of this method is discouraged, use {safeTransferFrom} whenever possible. * Requires the msg.sender to be the owner, approved, or operator. * @param from current owner of the token * @param to address to receive the ownership of the given token ID * @param tokenId uint256 ID of the token to be transferred */ function transferFrom(address from, address to, uint256 tokenId) public { //solhint-disable-next-line max-line-length require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved"); _transferFrom(from, to, tokenId); } /** * @dev Safely transfers the ownership of a given token ID to another address * If the target address is a contract, it must implement {IERC721Receiver-onERC721Received}, * which is called upon a safe transfer, and return the magic value * `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`; otherwise, * the transfer is reverted. * Requires the msg.sender to be the owner, approved, or operator * @param from current owner of the token * @param to address to receive the ownership of the given token ID * @param tokenId uint256 ID of the token to be transferred */ function safeTransferFrom(address from, address to, uint256 tokenId) public { safeTransferFrom(from, to, tokenId, ""); } /** * @dev Safely transfers the ownership of a given token ID to another address * If the target address is a contract, it must implement {IERC721Receiver-onERC721Received}, * which is called upon a safe transfer, and return the magic value * `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`; otherwise, * the transfer is reverted. * Requires the _msgSender() to be the owner, approved, or operator * @param from current owner of the token * @param to address to receive the ownership of the given token ID * @param tokenId uint256 ID of the token to be transferred * @param _data bytes data to send along with a safe transfer check */ function safeTransferFrom(address from, address to, uint256 tokenId, bytes memory _data) public { require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved"); _safeTransferFrom(from, to, tokenId, _data); } /** * @dev Safely transfers the ownership of a given token ID to another address * If the target address is a contract, it must implement `onERC721Received`, * which is called upon a safe transfer, and return the magic value * `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`; otherwise, * the transfer is reverted. * Requires the msg.sender to be the owner, approved, or operator * @param from current owner of the token * @param to address to receive the ownership of the given token ID * @param tokenId uint256 ID of the token to be transferred * @param _data bytes data to send along with a safe transfer check */ function _safeTransferFrom(address from, address to, uint256 tokenId, bytes memory _data) internal { _transferFrom(from, to, tokenId); require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer"); } /** * @dev Returns whether the specified token exists. * @param tokenId uint256 ID of the token to query the existence of * @return bool whether the token exists */ function _exists(uint256 tokenId) internal view returns (bool) { address owner = _tokenOwner[tokenId]; return owner != address(0); } /** * @dev Returns whether the given spender can transfer a given token ID. * @param spender address of the spender to query * @param tokenId uint256 ID of the token to be transferred * @return bool whether the msg.sender is approved for the given token ID, * is an operator of the owner, or is the owner of the token */ function _isApprovedOrOwner(address spender, uint256 tokenId) internal view returns (bool) { require(_exists(tokenId), "ERC721: operator query for nonexistent token"); address owner = ownerOf(tokenId); return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender)); } /** * @dev Internal function to safely mint a new token. * Reverts if the given token ID already exists. * If the target address is a contract, it must implement `onERC721Received`, * which is called upon a safe transfer, and return the magic value * `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`; otherwise, * the transfer is reverted. * @param to The address that will own the minted token * @param tokenId uint256 ID of the token to be minted */ function _safeMint(address to, uint256 tokenId) internal { _safeMint(to, tokenId, ""); } /** * @dev Internal function to safely mint a new token. * Reverts if the given token ID already exists. * If the target address is a contract, it must implement `onERC721Received`, * which is called upon a safe transfer, and return the magic value * `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`; otherwise, * the transfer is reverted. * @param to The address that will own the minted token * @param tokenId uint256 ID of the token to be minted * @param _data bytes data to send along with a safe transfer check */ function _safeMint(address to, uint256 tokenId, bytes memory _data) internal { _mint(to, tokenId); require(_checkOnERC721Received(address(0), to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer"); } /** * @dev Internal function to mint a new token. * Reverts if the given token ID already exists. * @param to The address that will own the minted token * @param tokenId uint256 ID of the token to be minted */ function _mint(address to, uint256 tokenId) internal { require(to != address(0), "ERC721: mint to the zero address"); require(!_exists(tokenId), "ERC721: token already minted"); _tokenOwner[tokenId] = to; _ownedTokensCount[to].increment(); emit Transfer(address(0), to, tokenId); } /** * @dev Internal function to burn a specific token. * Reverts if the token does not exist. * Deprecated, use {_burn} instead. * @param owner owner of the token to burn * @param tokenId uint256 ID of the token being burned */ function _burn(address owner, uint256 tokenId) internal { require(ownerOf(tokenId) == owner, "ERC721: burn of token that is not own"); _clearApproval(tokenId); _ownedTokensCount[owner].decrement(); _tokenOwner[tokenId] = address(0); emit Transfer(owner, address(0), tokenId); } /** * @dev Internal function to burn a specific token. * Reverts if the token does not exist. * @param tokenId uint256 ID of the token being burned */ function _burn(uint256 tokenId) internal { _burn(ownerOf(tokenId), tokenId); } /** * @dev Internal function to transfer ownership of a given token ID to another address. * As opposed to {transferFrom}, this imposes no restrictions on msg.sender. * @param from current owner of the token * @param to address to receive the ownership of the given token ID * @param tokenId uint256 ID of the token to be transferred */ function _transferFrom(address from, address to, uint256 tokenId) internal { require(ownerOf(tokenId) == from, "ERC721: transfer of token that is not own"); require(to != address(0), "ERC721: transfer to the zero address"); _clearApproval(tokenId); _ownedTokensCount[from].decrement(); _ownedTokensCount[to].increment(); _tokenOwner[tokenId] = to; emit Transfer(from, to, tokenId); } /** * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address. * The call is not executed if the target address is not a contract. * * This is an internal detail of the `ERC721` contract and its use is deprecated. * @param from address representing the previous owner of the given token ID * @param to target address that will receive the tokens * @param tokenId uint256 ID of the token to be transferred * @param _data bytes optional data to send along with the call * @return bool whether the call correctly returned the expected magic value */ function _checkOnERC721Received(address from, address to, uint256 tokenId, bytes memory _data) internal returns (bool) { if (!to.isContract()) { return true; } // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = to.call(abi.encodeWithSelector( IERC721Receiver(to).onERC721Received.selector, _msgSender(), from, tokenId, _data )); if (!success) { if (returndata.length > 0) { // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert("ERC721: transfer to non ERC721Receiver implementer"); } } else { bytes4 retval = abi.decode(returndata, (bytes4)); return (retval == _ERC721_RECEIVED); } } /** * @dev Private function to clear current approval of a given token ID. * @param tokenId uint256 ID of the token to be transferred */ function _clearApproval(uint256 tokenId) private { if (_tokenApprovals[tokenId] != address(0)) { _tokenApprovals[tokenId] = address(0); } } } contract ERC721Metadata is Context, ERC165, ERC721, IERC721Metadata { // Token name string private _name; // Token symbol string private _symbol; // Base URI string private _baseURI; // Optional mapping for token URIs mapping(uint256 => string) private _tokenURIs; /* * bytes4(keccak256('name()')) == 0x06fdde03 * bytes4(keccak256('symbol()')) == 0x95d89b41 * bytes4(keccak256('tokenURI(uint256)')) == 0xc87b56dd * * => 0x06fdde03 ^ 0x95d89b41 ^ 0xc87b56dd == 0x5b5e139f */ bytes4 private constant _INTERFACE_ID_ERC721_METADATA = 0x5b5e139f; /** * @dev Constructor function */ constructor (string memory name, string memory symbol) public { _name = name; _symbol = symbol; // register the supported interfaces to conform to ERC721 via ERC165 _registerInterface(_INTERFACE_ID_ERC721_METADATA); } /** * @dev Gets the token name. * @return string representing the token name */ function name() external view returns (string memory) { return _name; } /** * @dev Gets the token symbol. * @return string representing the token symbol */ function symbol() external view returns (string memory) { return _symbol; } /** * @dev Returns the URI for a given token ID. May return an empty string. * * If the token's URI is non-empty and a base URI was set (via * {_setBaseURI}), it will be added to the token ID's URI as a prefix. * * Reverts if the token ID does not exist. */ function tokenURI(uint256 tokenId) external view returns (string memory) { require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token"); string memory _tokenURI = _tokenURIs[tokenId]; // Even if there is a base URI, it is only appended to non-empty token-specific URIs if (bytes(_tokenURI).length == 0) { return ""; } else { // abi.encodePacked is being used to concatenate strings return string(abi.encodePacked(_baseURI, _tokenURI)); } } /** * @dev Internal function to set the token URI for a given token. * * Reverts if the token ID does not exist. * * TIP: if all token IDs share a prefix (e.g. if your URIs look like * `http://api.myproject.com/token/<id>`), use {_setBaseURI} to store * it and save gas. */ function _setTokenURI(uint256 tokenId, string memory _tokenURI) internal { require(_exists(tokenId), "ERC721Metadata: URI set of nonexistent token"); _tokenURIs[tokenId] = _tokenURI; } /** * @dev Internal function to set the base URI for all token IDs. It is * automatically added as a prefix to the value returned in {tokenURI}. * * _Available since v2.5.0._ */ function _setBaseURI(string memory baseURI) internal { _baseURI = baseURI; } /** * @dev Returns the base URI set via {_setBaseURI}. This will be * automatically added as a preffix in {tokenURI} to each token's URI, when * they are non-empty. * * _Available since v2.5.0._ */ function baseURI() external view returns (string memory) { return _baseURI; } /** * @dev Internal function to burn a specific token. * Reverts if the token does not exist. * Deprecated, use _burn(uint256) instead. * @param owner owner of the token to burn * @param tokenId uint256 ID of the token being burned by the msg.sender */ function _burn(address owner, uint256 tokenId) internal { super._burn(owner, tokenId); // Clear metadata (if any) if (bytes(_tokenURIs[tokenId]).length != 0) { delete _tokenURIs[tokenId]; } } } contract NFT is ERC721Metadata, Ownable { string internal _contractURI; constructor(string memory name, string memory symbol) public ERC721Metadata(name, symbol) {} function contractURI() external view returns (string memory) { return _contractURI; } function mint(address to, uint256 tokenId) external onlyOwner { _safeMint(to, tokenId); } function burn(uint256 tokenId) external onlyOwner { _burn(tokenId); } function setContractURI(string calldata newURI) external onlyOwner { _contractURI = newURI; } function setTokenURI(uint256 tokenId, string calldata newURI) external onlyOwner { _setTokenURI(tokenId, newURI); } function setBaseURI(string calldata newURI) external onlyOwner { _setBaseURI(newURI); } } contract ATokenMock is ERC20, ERC20Detailed { using SafeMath for uint256; using DecMath for uint256; uint256 internal constant YEAR = 31556952; // Number of seconds in one Gregorian calendar year (365.2425 days) ERC20 public dai; uint256 public liquidityRate; uint256 public normalizedIncome; address[] public users; mapping(address => bool) public isUser; constructor(address _dai) public ERC20Detailed("aDAI", "aDAI", 18) { dai = ERC20(_dai); liquidityRate = 10 ** 26; // 10% APY normalizedIncome = 10 ** 27; } function redeem(uint256 _amount) external { _burn(msg.sender, _amount); dai.transfer(msg.sender, _amount); } function mint(address _user, uint256 _amount) external { _mint(_user, _amount); if (!isUser[_user]) { users.push(_user); isUser[_user] = true; } } function mintInterest(uint256 _seconds) external { uint256 interest; address user; for (uint256 i = 0; i < users.length; i++) { user = users[i]; interest = balanceOf(user).mul(_seconds).mul(liquidityRate).div(YEAR.mul(10**27)); _mint(user, interest); } normalizedIncome = normalizedIncome.mul(_seconds).mul(liquidityRate).div(YEAR.mul(10**27)).add(normalizedIncome); } function setLiquidityRate(uint256 _liquidityRate) external { liquidityRate = _liquidityRate; } } contract CERC20Mock is ERC20, ERC20Detailed { address public dai; uint256 internal _supplyRate; uint256 internal _exchangeRate; constructor(address _dai) public ERC20Detailed("cDAI", "cDAI", 8) { dai = _dai; uint256 daiDecimals = ERC20Detailed(_dai).decimals(); _exchangeRate = 2 * (10**(daiDecimals + 8)); // 1 cDAI = 0.02 DAI _supplyRate = 45290900000; // 10% supply rate per year } function mint(uint256 amount) external returns (uint256) { require( ERC20(dai).transferFrom(msg.sender, address(this), amount), "Error during transferFrom" ); // 1 DAI _mint(msg.sender, (amount * 10**18) / _exchangeRate); return 0; } function redeemUnderlying(uint256 amount) external returns (uint256) { _burn(msg.sender, (amount * 10**18) / _exchangeRate); require( ERC20(dai).transfer(msg.sender, amount), "Error during transfer" ); // 1 DAI return 0; } function exchangeRateStored() external view returns (uint256) { return _exchangeRate; } function exchangeRateCurrent() external view returns (uint256) { return _exchangeRate; } function _setExchangeRateStored(uint256 _rate) external returns (uint256) { _exchangeRate = _rate; } function supplyRatePerBlock() external view returns (uint256) { return _supplyRate; } function _setSupplyRatePerBlock(uint256 _rate) external { _supplyRate = _rate; } } contract ERC20Mock is ERC20, ERC20Detailed("", "", 6) { function mint(address to, uint256 amount) public { _mint(to, amount); } } contract VaultMock is ERC20, ERC20Detailed { using SafeMath for uint256; using DecMath for uint256; ERC20 public underlying; constructor(address _underlying) public ERC20Detailed("yUSD", "yUSD", 18) { underlying = ERC20(_underlying); } function deposit(uint256 tokenAmount) public { uint256 sharePrice = getPricePerFullShare(); _mint(msg.sender, tokenAmount.decdiv(sharePrice)); underlying.transferFrom(msg.sender, address(this), tokenAmount); } function withdraw(uint256 sharesAmount) public { uint256 sharePrice = getPricePerFullShare(); uint256 underlyingAmount = sharesAmount.decmul(sharePrice); _burn(msg.sender, sharesAmount); underlying.transfer(msg.sender, underlyingAmount); } function getPricePerFullShare() public view returns (uint256) { uint256 _totalSupply = totalSupply(); if (_totalSupply == 0) { return 10**18; } return underlying.balanceOf(address(this)).decdiv(_totalSupply); } } contract EMAOracle is IInterestOracle { using SafeMath for uint256; using DecMath for uint256; uint256 internal constant PRECISION = 10**18; /** Immutable parameters */ uint256 public UPDATE_INTERVAL; uint256 public UPDATE_MULTIPLIER; uint256 public ONE_MINUS_UPDATE_MULTIPLIER; /** Public variables */ uint256 public emaStored; uint256 public lastIncomeIndex; uint256 public lastUpdateTimestamp; /** External contracts */ IMoneyMarket public moneyMarket; constructor( uint256 _emaInitial, uint256 _updateInterval, uint256 _smoothingFactor, uint256 _averageWindowInIntervals, address _moneyMarket ) public { emaStored = _emaInitial; UPDATE_INTERVAL = _updateInterval; lastUpdateTimestamp = now; uint256 updateMultiplier = _smoothingFactor.div(_averageWindowInIntervals.add(1)); UPDATE_MULTIPLIER = updateMultiplier; ONE_MINUS_UPDATE_MULTIPLIER = PRECISION.sub(updateMultiplier); moneyMarket = IMoneyMarket(_moneyMarket); lastIncomeIndex = moneyMarket.incomeIndex(); } function updateAndQuery() public returns (bool updated, uint256 value) { uint256 timeElapsed = now - lastUpdateTimestamp; if (timeElapsed < UPDATE_INTERVAL) { return (false, emaStored); } // save gas by loading storage variables to memory uint256 _lastIncomeIndex = lastIncomeIndex; uint256 _emaStored = emaStored; uint256 newIncomeIndex = moneyMarket.incomeIndex(); uint256 incomingValue = newIncomeIndex.sub(_lastIncomeIndex).decdiv(_lastIncomeIndex).div(timeElapsed); updated = true; value = incomingValue.mul(UPDATE_MULTIPLIER).add(_emaStored.mul(ONE_MINUS_UPDATE_MULTIPLIER)).div(PRECISION); emaStored = value; lastIncomeIndex = newIncomeIndex; lastUpdateTimestamp = now; } function query() public view returns (uint256 value) { return emaStored; } } contract MPHToken is ERC20, ERC20Detailed, Ownable { constructor() public ERC20Detailed("88mph.app", "MPH", 18) {} function ownerMint(address account, uint256 amount) public onlyOwner returns (bool) { _mint(account, amount); return true; } function ownerTransfer( address from, address to, uint256 amount ) public onlyOwner returns (bool) { _transfer(from, to, amount); return true; } }

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{"success": true, "error": null, "results": {"detectors": [{"check": "divide-before-multiply", "impact": "Medium", "confidence": "Medium"}, {"check": "reentrancy-no-eth", "impact": "Medium", "confidence": "Medium"}, {"check": "incorrect-equality", "impact": "Medium", "confidence": "High"}, {"check": "uninitialized-local", "impact": "Medium", "confidence": "Medium"}, {"check": "unchecked-transfer", "impact": "High", "confidence": "Medium"}, {"check": "unused-return", "impact": "Medium", "confidence": "Medium"}, {"check": "controlled-array-length", "impact": "High", "confidence": "Medium"}]}}

0x75c7E4B4c7E3355f21EE3a0376C39D2a2224dE98

pragma solidity 0.6.6; pragma experimental ABIEncoderV2; contract DSAuthEvents { event LogSetAuthority(address indexed authority); event LogSetOwner(address indexed owner); } contract DSAuth is DSAuthEvents { DSAuthority public authority; address public owner; constructor() public { owner = msg.sender; emit LogSetOwner(msg.sender); } function setOwner(address owner_) public auth { owner = owner_; emit LogSetOwner(owner); } function setAuthority(DSAuthority authority_) public auth { authority = authority_; emit LogSetAuthority(address(authority)); } modifier auth { require(isAuthorized(msg.sender, msg.sig)); _; } function isAuthorized(address src, bytes4 sig) internal view returns (bool) { if (src == address(this)) { return true; } else if (src == owner) { return true; } else if (authority == DSAuthority(0)) { return false; } else { return authority.canCall(src, address(this), sig); } } } abstract contract DSAuthority { function canCall(address src, address dst, bytes4 sig) public virtual view returns (bool); } abstract contract DSGuard { function canCall(address src_, address dst_, bytes4 sig) public view virtual returns (bool); function permit(bytes32 src, bytes32 dst, bytes32 sig) public virtual; function forbid(bytes32 src, bytes32 dst, bytes32 sig) public virtual; function permit(address src, address dst, bytes32 sig) public virtual; function forbid(address src, address dst, bytes32 sig) public virtual; } abstract contract DSGuardFactory { function newGuard() public virtual returns (DSGuard guard); } contract DSMath { function add(uint256 x, uint256 y) internal pure returns (uint256 z) { require((z = x + y) >= x); } function sub(uint256 x, uint256 y) internal pure returns (uint256 z) { require((z = x - y) <= x); } function mul(uint256 x, uint256 y) internal pure returns (uint256 z) { require(y == 0 || (z = x * y) / y == x); } function div(uint256 x, uint256 y) internal pure returns (uint256 z) { return x / y; } function min(uint256 x, uint256 y) internal pure returns (uint256 z) { return x <= y ? x : y; } function max(uint256 x, uint256 y) internal pure returns (uint256 z) { return x >= y ? x : y; } function imin(int256 x, int256 y) internal pure returns (int256 z) { return x <= y ? x : y; } function imax(int256 x, int256 y) internal pure returns (int256 z) { return x >= y ? x : y; } uint256 constant WAD = 10**18; uint256 constant RAY = 10**27; function wmul(uint256 x, uint256 y) internal pure returns (uint256 z) { z = add(mul(x, y), WAD / 2) / WAD; } function rmul(uint256 x, uint256 y) internal pure returns (uint256 z) { z = add(mul(x, y), RAY / 2) / RAY; } function wdiv(uint256 x, uint256 y) internal pure returns (uint256 z) { z = add(mul(x, WAD), y / 2) / y; } function rdiv(uint256 x, uint256 y) internal pure returns (uint256 z) { z = add(mul(x, RAY), y / 2) / y; } // This famous algorithm is called "exponentiation by squaring" // and calculates x^n with x as fixed-point and n as regular unsigned. // // It's O(log n), instead of O(n) for naive repeated multiplication. // // These facts are why it works: // // If n is even, then x^n = (x^2)^(n/2). // If n is odd, then x^n = x * x^(n-1), // and applying the equation for even x gives // x^n = x * (x^2)^((n-1) / 2). // // Also, EVM division is flooring and // floor[(n-1) / 2] = floor[n / 2]. // function rpow(uint256 x, uint256 n) internal pure returns (uint256 z) { z = n % 2 != 0 ? x : RAY; for (n /= 2; n != 0; n /= 2) { x = rmul(x, x); if (n % 2 != 0) { z = rmul(z, x); } } } } contract DSNote { event LogNote( bytes4 indexed sig, address indexed guy, bytes32 indexed foo, bytes32 indexed bar, uint256 wad, bytes fax ) anonymous; modifier note { bytes32 foo; bytes32 bar; assembly { foo := calldataload(4) bar := calldataload(36) } emit LogNote(msg.sig, msg.sender, foo, bar, msg.value, msg.data); _; } } abstract contract DSProxy is DSAuth, DSNote { DSProxyCache public cache; // global cache for contracts constructor(address _cacheAddr) public { require(setCache(_cacheAddr)); } // solhint-disable-next-line no-empty-blocks receive() external payable {} // use the proxy to execute calldata _data on contract _code // function execute(bytes memory _code, bytes memory _data) // public // payable // virtual // returns (address target, bytes32 response); function execute(address _target, bytes memory _data) public payable virtual returns (bytes32 response); //set new cache function setCache(address _cacheAddr) public virtual payable returns (bool); } contract DSProxyCache { mapping(bytes32 => address) cache; function read(bytes memory _code) public view returns (address) { bytes32 hash = keccak256(_code); return cache[hash]; } function write(bytes memory _code) public returns (address target) { assembly { target := create(0, add(_code, 0x20), mload(_code)) switch iszero(extcodesize(target)) case 1 { // throw if contract failed to deploy revert(0, 0) } } bytes32 hash = keccak256(_code); cache[hash] = target; } } abstract contract DSProxyFactoryInterface { function build(address owner) public virtual returns (DSProxy proxy); } contract Migrations { address public owner; uint public last_completed_migration; modifier restricted() { if (msg.sender == owner) _; } constructor() public { owner = msg.sender; } function setCompleted(uint completed) public restricted { last_completed_migration = completed; } function upgrade(address new_address) public restricted { Migrations upgraded = Migrations(new_address); upgraded.setCompleted(last_completed_migration); } } contract AaveHelper is DSMath { using SafeERC20 for ERC20; address payable public constant WALLET_ADDR = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; address public constant DISCOUNT_ADDR = 0x1b14E8D511c9A4395425314f849bD737BAF8208F; uint public constant SERVICE_FEE = 400; // 0.25% Fee address public constant ETH_ADDR = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant AAVE_LENDING_POOL_ADDRESSES = 0x24a42fD28C976A61Df5D00D0599C34c4f90748c8; uint public constant NINETY_NINE_PERCENT_WEI = 999900000000000000; uint16 public constant AAVE_REFERRAL_CODE = 64; /// @param _collateralAddress underlying token address /// @param _user users address function getMaxCollateral(address _collateralAddress, address _user) public view returns (uint256) { address lendingPoolAddressDataProvider = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolDataProvider(); address lendingPoolCoreAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); // fetch all needed data // using LTV as tokenLiquidationThreshold (,uint256 totalCollateralETH, uint256 totalBorrowsETH,,uint256 currentLiquidationThreshold,,,) = ILendingPool(lendingPoolAddressDataProvider).calculateUserGlobalData(_user); (,uint256 tokenLiquidationThreshold,,) = ILendingPool(lendingPoolCoreAddress).getReserveConfiguration(_collateralAddress); uint256 collateralPrice = IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_collateralAddress); uint256 userTokenBalance = ILendingPool(lendingPoolCoreAddress).getUserUnderlyingAssetBalance(_collateralAddress, _user); uint256 userTokenBalanceEth = wmul(userTokenBalance, collateralPrice); // if borrow is 0, return whole user balance if (totalBorrowsETH == 0) { return userTokenBalance; } uint256 maxCollateralEth = div(sub(mul(currentLiquidationThreshold, totalCollateralETH), mul(totalBorrowsETH, 100)), currentLiquidationThreshold); /// @dev final amount can't be higher than users token balance maxCollateralEth = maxCollateralEth > userTokenBalanceEth ? userTokenBalanceEth : maxCollateralEth; // might happen due to wmul precision if (maxCollateralEth >= totalCollateralETH) { return totalCollateralETH; } // get sum of all other reserves multiplied with their liquidation thresholds by reversing formula uint256 a = sub(wmul(currentLiquidationThreshold, totalCollateralETH), wmul(tokenLiquidationThreshold, userTokenBalanceEth)); // add new collateral amount multiplied by its threshold, and then divide with new total collateral uint256 newLiquidationThreshold = wdiv(add(a, wmul(sub(userTokenBalanceEth, maxCollateralEth), tokenLiquidationThreshold)), sub(totalCollateralETH, maxCollateralEth)); // if new threshold is lower than first one, calculate new max collateral with newLiquidationThreshold if (newLiquidationThreshold < currentLiquidationThreshold) { maxCollateralEth = div(sub(mul(newLiquidationThreshold, totalCollateralETH), mul(totalBorrowsETH, 100)), newLiquidationThreshold); maxCollateralEth = maxCollateralEth > userTokenBalanceEth ? userTokenBalanceEth : maxCollateralEth; } return wmul(wdiv(maxCollateralEth, collateralPrice), NINETY_NINE_PERCENT_WEI); } /// @param _borrowAddress underlying token address /// @param _user users address function getMaxBorrow(address _borrowAddress, address _user) public view returns (uint256) { address lendingPoolAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); (,,,,uint256 availableBorrowsETH,,,) = ILendingPool(lendingPoolAddress).getUserAccountData(_user); uint256 borrowPrice = IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_borrowAddress); return wmul(wdiv(availableBorrowsETH, borrowPrice), NINETY_NINE_PERCENT_WEI); } /// @notice Calculates the fee amount /// @param _amount Amount that is converted /// @param _user Actuall user addr not DSProxy /// @param _gasCost Ether amount of gas we are spending for tx /// @param _tokenAddr token addr. of token we are getting for the fee /// @return feeAmount The amount we took for the fee function getFee(uint _amount, address _user, uint _gasCost, address _tokenAddr) internal returns (uint feeAmount) { address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); uint fee = SERVICE_FEE; if (Discount(DISCOUNT_ADDR).isCustomFeeSet(_user)) { fee = Discount(DISCOUNT_ADDR).getCustomServiceFee(_user); } feeAmount = (fee == 0) ? 0 : (_amount / fee); if (_gasCost != 0) { uint256 price = IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_tokenAddr); _gasCost = wmul(_gasCost, price); feeAmount = add(feeAmount, _gasCost); } // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } if (_tokenAddr == ETH_ADDR) { WALLET_ADDR.transfer(feeAmount); } else { ERC20(_tokenAddr).safeTransfer(WALLET_ADDR, feeAmount); } } /// @notice Returns the owner of the DSProxy that called the contract function getUserAddress() internal view returns (address) { DSProxy proxy = DSProxy(payable(address(this))); return proxy.owner(); } /// @notice Approves token contract to pull underlying tokens from the DSProxy /// @param _tokenAddr Token we are trying to approve /// @param _caller Address which will gain the approval function approveToken(address _tokenAddr, address _caller) internal { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeApprove(_caller, uint256(-1)); } } /// @notice Send specific amount from contract to specific user /// @param _token Token we are trying to send /// @param _user User that should receive funds /// @param _amount Amount that should be sent function sendContractBalance(address _token, address _user, uint _amount) public { if (_token == ETH_ADDR) { payable(_user).transfer(_amount); } else { ERC20(_token).safeTransfer(_user, _amount); } } function sendFullContractBalance(address _token, address _user) public { if (_token == ETH_ADDR) { sendContractBalance(_token, _user, address(this).balance); } else { sendContractBalance(_token, _user, ERC20(_token).balanceOf(address(this))); } } } contract AaveSafetyRatio is AaveHelper { function getSafetyRatio(address _user) public view returns(uint256) { address lendingPoolAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); (,,uint256 totalBorrowsETH,,uint256 availableBorrowsETH,,,) = ILendingPool(lendingPoolAddress).getUserAccountData(_user); return wdiv(add(totalBorrowsETH, availableBorrowsETH), totalBorrowsETH); } } contract AdminAuth { using SafeERC20 for ERC20; address public owner; address public admin; modifier onlyOwner() { require(owner == msg.sender); _; } constructor() public { owner = msg.sender; } /// @notice Admin is set by owner first time, after that admin is super role and has permission to change owner /// @param _admin Address of multisig that becomes admin function setAdminByOwner(address _admin) public { require(msg.sender == owner); require(admin == address(0)); admin = _admin; } /// @notice Admin is able to set new admin /// @param _admin Address of multisig that becomes new admin function setAdminByAdmin(address _admin) public { require(msg.sender == admin); admin = _admin; } /// @notice Admin is able to change owner /// @param _owner Address of new owner function setOwnerByAdmin(address _owner) public { require(msg.sender == admin); owner = _owner; } /// @notice Destroy the contract function kill() public onlyOwner { selfdestruct(payable(owner)); } /// @notice withdraw stuck funds function withdrawStuckFunds(address _token, uint _amount) public onlyOwner { if (_token == 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE) { payable(owner).transfer(_amount); } else { ERC20(_token).safeTransfer(owner, _amount); } } } contract Auth is AdminAuth { bool public ALL_AUTHORIZED = false; mapping(address => bool) public authorized; modifier onlyAuthorized() { require(ALL_AUTHORIZED || authorized[msg.sender]); _; } constructor() public { authorized[msg.sender] = true; } function setAuthorized(address _user, bool _approved) public onlyOwner { authorized[_user] = _approved; } function setAllAuthorized(bool _authorized) public onlyOwner { ALL_AUTHORIZED = _authorized; } } contract ProxyPermission { address public constant FACTORY_ADDRESS = 0x5a15566417e6C1c9546523066500bDDBc53F88C7; /// @notice Called in the context of DSProxy to authorize an address /// @param _contractAddr Address which will be authorized function givePermission(address _contractAddr) public { address currAuthority = address(DSAuth(address(this)).authority()); DSGuard guard = DSGuard(currAuthority); if (currAuthority == address(0)) { guard = DSGuardFactory(FACTORY_ADDRESS).newGuard(); DSAuth(address(this)).setAuthority(DSAuthority(address(guard))); } guard.permit(_contractAddr, address(this), bytes4(keccak256("execute(address,bytes)"))); } /// @notice Called in the context of DSProxy to remove authority of an address /// @param _contractAddr Auth address which will be removed from authority list function removePermission(address _contractAddr) public { address currAuthority = address(DSAuth(address(this)).authority()); // if there is no authority, that means that contract doesn't have permission if (currAuthority == address(0)) { return; } DSGuard guard = DSGuard(currAuthority); guard.forbid(_contractAddr, address(this), bytes4(keccak256("execute(address,bytes)"))); } } contract CompoundMonitorProxy is AdminAuth { using SafeERC20 for ERC20; uint public CHANGE_PERIOD; address public monitor; address public newMonitor; address public lastMonitor; uint public changeRequestedTimestamp; mapping(address => bool) public allowed; event MonitorChangeInitiated(address oldMonitor, address newMonitor); event MonitorChangeCanceled(); event MonitorChangeFinished(address monitor); event MonitorChangeReverted(address monitor); // if someone who is allowed become malicious, owner can't be changed modifier onlyAllowed() { require(allowed[msg.sender] || msg.sender == owner); _; } modifier onlyMonitor() { require (msg.sender == monitor); _; } constructor(uint _changePeriod) public { CHANGE_PERIOD = _changePeriod * 1 days; } /// @notice Only monitor contract is able to call execute on users proxy /// @param _owner Address of cdp owner (users DSProxy address) /// @param _compoundSaverProxy Address of CompoundSaverProxy /// @param _data Data to send to CompoundSaverProxy function callExecute(address _owner, address _compoundSaverProxy, bytes memory _data) public payable onlyMonitor { // execute reverts if calling specific method fails DSProxyInterface(_owner).execute{value: msg.value}(_compoundSaverProxy, _data); // return if anything left if (address(this).balance > 0) { msg.sender.transfer(address(this).balance); } } /// @notice Allowed users are able to set Monitor contract without any waiting period first time /// @param _monitor Address of Monitor contract function setMonitor(address _monitor) public onlyAllowed { require(monitor == address(0)); monitor = _monitor; } /// @notice Allowed users are able to start procedure for changing monitor /// @dev after CHANGE_PERIOD needs to call confirmNewMonitor to actually make a change /// @param _newMonitor address of new monitor function changeMonitor(address _newMonitor) public onlyAllowed { require(changeRequestedTimestamp == 0); changeRequestedTimestamp = now; lastMonitor = monitor; newMonitor = _newMonitor; emit MonitorChangeInitiated(lastMonitor, newMonitor); } /// @notice At any point allowed users are able to cancel monitor change function cancelMonitorChange() public onlyAllowed { require(changeRequestedTimestamp > 0); changeRequestedTimestamp = 0; newMonitor = address(0); emit MonitorChangeCanceled(); } /// @notice Anyone is able to confirm new monitor after CHANGE_PERIOD if process is started function confirmNewMonitor() public onlyAllowed { require((changeRequestedTimestamp + CHANGE_PERIOD) < now); require(changeRequestedTimestamp != 0); require(newMonitor != address(0)); monitor = newMonitor; newMonitor = address(0); changeRequestedTimestamp = 0; emit MonitorChangeFinished(monitor); } /// @notice Its possible to revert monitor to last used monitor function revertMonitor() public onlyAllowed { require(lastMonitor != address(0)); monitor = lastMonitor; emit MonitorChangeReverted(monitor); } /// @notice Allowed users are able to add new allowed user /// @param _user Address of user that will be allowed function addAllowed(address _user) public onlyAllowed { allowed[_user] = true; } /// @notice Allowed users are able to remove allowed user /// @dev owner is always allowed even if someone tries to remove it from allowed mapping /// @param _user Address of allowed user function removeAllowed(address _user) public onlyAllowed { allowed[_user] = false; } function setChangePeriod(uint _periodInDays) public onlyAllowed { require(_periodInDays * 1 days > CHANGE_PERIOD); CHANGE_PERIOD = _periodInDays * 1 days; } /// @notice In case something is left in contract, owner is able to withdraw it /// @param _token address of token to withdraw balance function withdrawToken(address _token) public onlyOwner { uint balance = ERC20(_token).balanceOf(address(this)); ERC20(_token).safeTransfer(msg.sender, balance); } /// @notice In case something is left in contract, owner is able to withdraw it function withdrawEth() public onlyOwner { uint balance = address(this).balance; msg.sender.transfer(balance); } } contract CompoundSubscriptions is AdminAuth { struct CompoundHolder { address user; uint128 minRatio; uint128 maxRatio; uint128 optimalRatioBoost; uint128 optimalRatioRepay; bool boostEnabled; } struct SubPosition { uint arrPos; bool subscribed; } CompoundHolder[] public subscribers; mapping (address => SubPosition) public subscribersPos; uint public changeIndex; event Subscribed(address indexed user); event Unsubscribed(address indexed user); event Updated(address indexed user); event ParamUpdates(address indexed user, uint128, uint128, uint128, uint128, bool); /// @dev Called by the DSProxy contract which owns the Compound position /// @notice Adds the users Compound poistion in the list of subscriptions so it can be monitored /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalBoost Ratio amount which boost should target /// @param _optimalRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled function subscribe(uint128 _minRatio, uint128 _maxRatio, uint128 _optimalBoost, uint128 _optimalRepay, bool _boostEnabled) external { // if boost is not enabled, set max ratio to max uint uint128 localMaxRatio = _boostEnabled ? _maxRatio : uint128(-1); require(checkParams(_minRatio, localMaxRatio), "Must be correct params"); SubPosition storage subInfo = subscribersPos[msg.sender]; CompoundHolder memory subscription = CompoundHolder({ minRatio: _minRatio, maxRatio: localMaxRatio, optimalRatioBoost: _optimalBoost, optimalRatioRepay: _optimalRepay, user: msg.sender, boostEnabled: _boostEnabled }); changeIndex++; if (subInfo.subscribed) { subscribers[subInfo.arrPos] = subscription; emit Updated(msg.sender); emit ParamUpdates(msg.sender, _minRatio, localMaxRatio, _optimalBoost, _optimalRepay, _boostEnabled); } else { subscribers.push(subscription); subInfo.arrPos = subscribers.length - 1; subInfo.subscribed = true; emit Subscribed(msg.sender); } } /// @notice Called by the users DSProxy /// @dev Owner who subscribed cancels his subscription function unsubscribe() external { _unsubscribe(msg.sender); } /// @dev Checks limit if minRatio is bigger than max /// @param _minRatio Minimum ratio, bellow which repay can be triggered /// @param _maxRatio Maximum ratio, over which boost can be triggered /// @return Returns bool if the params are correct function checkParams(uint128 _minRatio, uint128 _maxRatio) internal pure returns (bool) { if (_minRatio > _maxRatio) { return false; } return true; } /// @dev Internal method to remove a subscriber from the list /// @param _user The actual address that owns the Compound position function _unsubscribe(address _user) internal { require(subscribers.length > 0, "Must have subscribers in the list"); SubPosition storage subInfo = subscribersPos[_user]; require(subInfo.subscribed, "Must first be subscribed"); address lastOwner = subscribers[subscribers.length - 1].user; SubPosition storage subInfo2 = subscribersPos[lastOwner]; subInfo2.arrPos = subInfo.arrPos; subscribers[subInfo.arrPos] = subscribers[subscribers.length - 1]; subscribers.pop(); // remove last element and reduce arr length changeIndex++; subInfo.subscribed = false; subInfo.arrPos = 0; emit Unsubscribed(msg.sender); } /// @dev Checks if the user is subscribed /// @param _user The actual address that owns the Compound position /// @return If the user is subscribed function isSubscribed(address _user) public view returns (bool) { SubPosition storage subInfo = subscribersPos[_user]; return subInfo.subscribed; } /// @dev Returns subscribtion information about a user /// @param _user The actual address that owns the Compound position /// @return Subscription information about the user if exists function getHolder(address _user) public view returns (CompoundHolder memory) { SubPosition storage subInfo = subscribersPos[_user]; return subscribers[subInfo.arrPos]; } /// @notice Helper method to return all the subscribed CDPs /// @return List of all subscribers function getSubscribers() public view returns (CompoundHolder[] memory) { return subscribers; } /// @notice Helper method for the frontend, returns all the subscribed CDPs paginated /// @param _page What page of subscribers you want /// @param _perPage Number of entries per page /// @return List of all subscribers for that page function getSubscribersByPage(uint _page, uint _perPage) public view returns (CompoundHolder[] memory) { CompoundHolder[] memory holders = new CompoundHolder[](_perPage); uint start = _page * _perPage; uint end = start + _perPage; end = (end > holders.length) ? holders.length : end; uint count = 0; for (uint i = start; i < end; i++) { holders[count] = subscribers[i]; count++; } return holders; } ////////////// ADMIN METHODS /////////////////// /// @notice Admin function to unsubscribe a CDP /// @param _user The actual address that owns the Compound position function unsubscribeByAdmin(address _user) public onlyOwner { SubPosition storage subInfo = subscribersPos[_user]; if (subInfo.subscribed) { _unsubscribe(_user); } } } contract CompoundSubscriptionsProxy is ProxyPermission { address public constant COMPOUND_SUBSCRIPTION_ADDRESS = 0x52015EFFD577E08f498a0CCc11905925D58D6207; address public constant COMPOUND_MONITOR_PROXY = 0xB1cF8DE8e791E4Ed1Bd86c03E2fc1f14389Cb10a; /// @notice Calls subscription contract and creates a DSGuard if non existent /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalRatioBoost Ratio amount which boost should target /// @param _optimalRatioRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled function subscribe( uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled ) public { givePermission(COMPOUND_MONITOR_PROXY); ICompoundSubscription(COMPOUND_SUBSCRIPTION_ADDRESS).subscribe( _minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled); } /// @notice Calls subscription contract and updated existing parameters /// @dev If subscription is non existent this will create one /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalRatioBoost Ratio amount which boost should target /// @param _optimalRatioRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled function update( uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled ) public { ICompoundSubscription(COMPOUND_SUBSCRIPTION_ADDRESS).subscribe(_minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled); } /// @notice Calls the subscription contract to unsubscribe the caller function unsubscribe() public { removePermission(COMPOUND_MONITOR_PROXY); ICompoundSubscription(COMPOUND_SUBSCRIPTION_ADDRESS).unsubscribe(); } } contract CompoundCreateTaker is ProxyPermission { using SafeERC20 for ERC20; address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); // solhint-disable-next-line const-name-snakecase DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); struct CreateInfo { address cCollAddress; address cBorrowAddress; uint depositAmount; } /// @notice Main function which will take a FL and open a leverage position /// @dev Call through DSProxy, if _exchangeData.destAddr is a token approve DSProxy /// @param _createInfo [cCollAddress, cBorrowAddress, depositAmount] /// @param _exchangeData Exchange data struct function openLeveragedLoan( CreateInfo memory _createInfo, SaverExchangeCore.ExchangeData memory _exchangeData, address payable _compReceiver ) public payable { uint loanAmount = _exchangeData.srcAmount; // Pull tokens from user if (_exchangeData.destAddr != ETH_ADDRESS) { ERC20(_exchangeData.destAddr).safeTransferFrom(msg.sender, address(this), _createInfo.depositAmount); } else { require(msg.value >= _createInfo.depositAmount, "Must send correct amount of eth"); } // Send tokens to FL receiver sendDeposit(_compReceiver, _exchangeData.destAddr); // Pack the struct data (uint[4] memory numData, address[6] memory cAddresses, bytes memory callData) = _packData(_createInfo, _exchangeData); bytes memory paramsData = abi.encode(numData, cAddresses, callData, address(this)); givePermission(_compReceiver); lendingPool.flashLoan(_compReceiver, _exchangeData.srcAddr, loanAmount, paramsData); removePermission(_compReceiver); logger.Log(address(this), msg.sender, "CompoundLeveragedLoan", abi.encode(_exchangeData.srcAddr, _exchangeData.destAddr, _exchangeData.srcAmount, _exchangeData.destAmount)); } function sendDeposit(address payable _compoundReceiver, address _token) internal { if (_token != ETH_ADDRESS) { ERC20(_token).safeTransfer(_compoundReceiver, ERC20(_token).balanceOf(address(this))); } _compoundReceiver.transfer(address(this).balance); } function _packData( CreateInfo memory _createInfo, SaverExchangeCore.ExchangeData memory exchangeData ) internal pure returns (uint[4] memory numData, address[6] memory cAddresses, bytes memory callData) { numData = [ exchangeData.srcAmount, exchangeData.destAmount, exchangeData.minPrice, exchangeData.price0x ]; cAddresses = [ _createInfo.cCollAddress, _createInfo.cBorrowAddress, exchangeData.srcAddr, exchangeData.destAddr, exchangeData.exchangeAddr, exchangeData.wrapper ]; callData = exchangeData.callData; } } contract CarefulMath { /** * @dev Possible error codes that we can return */ enum MathError { NO_ERROR, DIVISION_BY_ZERO, INTEGER_OVERFLOW, INTEGER_UNDERFLOW } /** * @dev Multiplies two numbers, returns an error on overflow. */ function mulUInt(uint a, uint b) internal pure returns (MathError, uint) { if (a == 0) { return (MathError.NO_ERROR, 0); } uint c = a * b; if (c / a != b) { return (MathError.INTEGER_OVERFLOW, 0); } else { return (MathError.NO_ERROR, c); } } /** * @dev Integer division of two numbers, truncating the quotient. */ function divUInt(uint a, uint b) internal pure returns (MathError, uint) { if (b == 0) { return (MathError.DIVISION_BY_ZERO, 0); } return (MathError.NO_ERROR, a / b); } /** * @dev Subtracts two numbers, returns an error on overflow (i.e. if subtrahend is greater than minuend). */ function subUInt(uint a, uint b) internal pure returns (MathError, uint) { if (b <= a) { return (MathError.NO_ERROR, a - b); } else { return (MathError.INTEGER_UNDERFLOW, 0); } } /** * @dev Adds two numbers, returns an error on overflow. */ function addUInt(uint a, uint b) internal pure returns (MathError, uint) { uint c = a + b; if (c >= a) { return (MathError.NO_ERROR, c); } else { return (MathError.INTEGER_OVERFLOW, 0); } } /** * @dev add a and b and then subtract c */ function addThenSubUInt(uint a, uint b, uint c) internal pure returns (MathError, uint) { (MathError err0, uint sum) = addUInt(a, b); if (err0 != MathError.NO_ERROR) { return (err0, 0); } return subUInt(sum, c); } } contract Exponential is CarefulMath { uint constant expScale = 1e18; uint constant halfExpScale = expScale/2; uint constant mantissaOne = expScale; struct Exp { uint mantissa; } /** * @dev Creates an exponential from numerator and denominator values. * Note: Returns an error if (`num` * 10e18) > MAX_INT, * or if `denom` is zero. */ function getExp(uint num, uint denom) pure internal returns (MathError, Exp memory) { (MathError err0, uint scaledNumerator) = mulUInt(num, expScale); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } (MathError err1, uint rational) = divUInt(scaledNumerator, denom); if (err1 != MathError.NO_ERROR) { return (err1, Exp({mantissa: 0})); } return (MathError.NO_ERROR, Exp({mantissa: rational})); } /** * @dev Adds two exponentials, returning a new exponential. */ function addExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) { (MathError error, uint result) = addUInt(a.mantissa, b.mantissa); return (error, Exp({mantissa: result})); } /** * @dev Subtracts two exponentials, returning a new exponential. */ function subExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) { (MathError error, uint result) = subUInt(a.mantissa, b.mantissa); return (error, Exp({mantissa: result})); } /** * @dev Multiply an Exp by a scalar, returning a new Exp. */ function mulScalar(Exp memory a, uint scalar) pure internal returns (MathError, Exp memory) { (MathError err0, uint scaledMantissa) = mulUInt(a.mantissa, scalar); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } return (MathError.NO_ERROR, Exp({mantissa: scaledMantissa})); } /** * @dev Multiply an Exp by a scalar, then truncate to return an unsigned integer. */ function mulScalarTruncate(Exp memory a, uint scalar) pure internal returns (MathError, uint) { (MathError err, Exp memory product) = mulScalar(a, scalar); if (err != MathError.NO_ERROR) { return (err, 0); } return (MathError.NO_ERROR, truncate(product)); } /** * @dev Multiply an Exp by a scalar, truncate, then add an to an unsigned integer, returning an unsigned integer. */ function mulScalarTruncateAddUInt(Exp memory a, uint scalar, uint addend) pure internal returns (MathError, uint) { (MathError err, Exp memory product) = mulScalar(a, scalar); if (err != MathError.NO_ERROR) { return (err, 0); } return addUInt(truncate(product), addend); } /** * @dev Divide an Exp by a scalar, returning a new Exp. */ function divScalar(Exp memory a, uint scalar) pure internal returns (MathError, Exp memory) { (MathError err0, uint descaledMantissa) = divUInt(a.mantissa, scalar); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } return (MathError.NO_ERROR, Exp({mantissa: descaledMantissa})); } /** * @dev Divide a scalar by an Exp, returning a new Exp. */ function divScalarByExp(uint scalar, Exp memory divisor) pure internal returns (MathError, Exp memory) { /* We are doing this as: getExp(mulUInt(expScale, scalar), divisor.mantissa) How it works: Exp = a / b; Scalar = s; `s / (a / b)` = `b * s / a` and since for an Exp `a = mantissa, b = expScale` */ (MathError err0, uint numerator) = mulUInt(expScale, scalar); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } return getExp(numerator, divisor.mantissa); } /** * @dev Divide a scalar by an Exp, then truncate to return an unsigned integer. */ function divScalarByExpTruncate(uint scalar, Exp memory divisor) pure internal returns (MathError, uint) { (MathError err, Exp memory fraction) = divScalarByExp(scalar, divisor); if (err != MathError.NO_ERROR) { return (err, 0); } return (MathError.NO_ERROR, truncate(fraction)); } /** * @dev Multiplies two exponentials, returning a new exponential. */ function mulExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) { (MathError err0, uint doubleScaledProduct) = mulUInt(a.mantissa, b.mantissa); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } // We add half the scale before dividing so that we get rounding instead of truncation. // See "Listing 6" and text above it at https://accu.org/index.php/journals/1717 // Without this change, a result like 6.6...e-19 will be truncated to 0 instead of being rounded to 1e-18. (MathError err1, uint doubleScaledProductWithHalfScale) = addUInt(halfExpScale, doubleScaledProduct); if (err1 != MathError.NO_ERROR) { return (err1, Exp({mantissa: 0})); } (MathError err2, uint product) = divUInt(doubleScaledProductWithHalfScale, expScale); // The only error `div` can return is MathError.DIVISION_BY_ZERO but we control `expScale` and it is not zero. assert(err2 == MathError.NO_ERROR); return (MathError.NO_ERROR, Exp({mantissa: product})); } /** * @dev Multiplies two exponentials given their mantissas, returning a new exponential. */ function mulExp(uint a, uint b) pure internal returns (MathError, Exp memory) { return mulExp(Exp({mantissa: a}), Exp({mantissa: b})); } /** * @dev Multiplies three exponentials, returning a new exponential. */ function mulExp3(Exp memory a, Exp memory b, Exp memory c) pure internal returns (MathError, Exp memory) { (MathError err, Exp memory ab) = mulExp(a, b); if (err != MathError.NO_ERROR) { return (err, ab); } return mulExp(ab, c); } /** * @dev Divides two exponentials, returning a new exponential. * (a/scale) / (b/scale) = (a/scale) * (scale/b) = a/b, * which we can scale as an Exp by calling getExp(a.mantissa, b.mantissa) */ function divExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) { return getExp(a.mantissa, b.mantissa); } /** * @dev Truncates the given exp to a whole number value. * For example, truncate(Exp{mantissa: 15 * expScale}) = 15 */ function truncate(Exp memory exp) pure internal returns (uint) { // Note: We are not using careful math here as we're performing a division that cannot fail return exp.mantissa / expScale; } /** * @dev Checks if first Exp is less than second Exp. */ function lessThanExp(Exp memory left, Exp memory right) pure internal returns (bool) { return left.mantissa < right.mantissa; } /** * @dev Checks if left Exp <= right Exp. */ function lessThanOrEqualExp(Exp memory left, Exp memory right) pure internal returns (bool) { return left.mantissa <= right.mantissa; } /** * @dev Checks if left Exp > right Exp. */ function greaterThanExp(Exp memory left, Exp memory right) pure internal returns (bool) { return left.mantissa > right.mantissa; } /** * @dev returns true if Exp is exactly zero */ function isZeroExp(Exp memory value) pure internal returns (bool) { return value.mantissa == 0; } } contract CompoundBorrowProxy { using SafeERC20 for ERC20; address public constant ETH_ADDR = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant COMPTROLLER_ADDR = 0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B; function borrow(address _cCollToken, address _cBorrowToken, address _borrowToken, uint _amount) public { address[] memory markets = new address[](2); markets[0] = _cCollToken; markets[1] = _cBorrowToken; ComptrollerInterface(COMPTROLLER_ADDR).enterMarkets(markets); require(CTokenInterface(_cBorrowToken).borrow(_amount) == 0); // withdraw funds to msg.sender if (_borrowToken != ETH_ADDR) { ERC20(_borrowToken).safeTransfer(msg.sender, ERC20(_borrowToken).balanceOf(address(this))); } else { msg.sender.transfer(address(this).balance); } } } contract AllowanceProxy is AdminAuth { using SafeERC20 for ERC20; address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; // TODO: Real saver exchange address SaverExchange saverExchange = SaverExchange(0x235abFAd01eb1BDa28Ef94087FBAA63E18074926); function callSell(SaverExchangeCore.ExchangeData memory exData) public payable { pullAndSendTokens(exData.srcAddr, exData.srcAmount); saverExchange.sell{value: msg.value}(exData, msg.sender); } function callBuy(SaverExchangeCore.ExchangeData memory exData) public payable { pullAndSendTokens(exData.srcAddr, exData.srcAmount); saverExchange.buy{value: msg.value}(exData, msg.sender); } function pullAndSendTokens(address _tokenAddr, uint _amount) internal { if (_tokenAddr == KYBER_ETH_ADDRESS) { require(msg.value >= _amount, "msg.value smaller than amount"); } else { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(saverExchange), _amount); } } function ownerChangeExchange(address payable _newExchange) public onlyOwner { saverExchange = SaverExchange(_newExchange); } } contract Prices is DSMath { address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; enum ActionType { SELL, BUY } /// @notice Returns the best estimated price from 2 exchanges /// @param _amount Amount of source tokens you want to exchange /// @param _srcToken Address of the source token /// @param _destToken Address of the destination token /// @param _type Type of action SELL|BUY /// @param _wrappers Array of wrapper addresses to compare /// @return (address, uint) The address of the best exchange and the exchange price function getBestPrice( uint256 _amount, address _srcToken, address _destToken, ActionType _type, address[] memory _wrappers ) public returns (address, uint256) { uint256[] memory rates = new uint256[](_wrappers.length); for (uint i=0; i<_wrappers.length; i++) { rates[i] = getExpectedRate(_wrappers[i], _srcToken, _destToken, _amount, _type); } if (_type == ActionType.SELL) { return getBiggestRate(_wrappers, rates); } else { return getSmallestRate(_wrappers, rates); } } /// @notice Return the expected rate from the exchange wrapper /// @dev In case of Oasis/Uniswap handles the different precision tokens /// @param _wrapper Address of exchange wrapper /// @param _srcToken From token /// @param _destToken To token /// @param _amount Amount to be exchanged /// @param _type Type of action SELL|BUY function getExpectedRate( address _wrapper, address _srcToken, address _destToken, uint256 _amount, ActionType _type ) public returns (uint256) { bool success; bytes memory result; if (_type == ActionType.SELL) { (success, result) = _wrapper.call(abi.encodeWithSignature( "getSellRate(address,address,uint256)", _srcToken, _destToken, _amount )); } else { (success, result) = _wrapper.call(abi.encodeWithSignature( "getBuyRate(address,address,uint256)", _srcToken, _destToken, _amount )); } if (success) { return sliceUint(result, 0); } return 0; } /// @notice Finds the biggest rate between exchanges, needed for sell rate /// @param _wrappers Array of wrappers to compare /// @param _rates Array of rates to compare function getBiggestRate( address[] memory _wrappers, uint256[] memory _rates ) internal pure returns (address, uint) { uint256 maxIndex = 0; // starting from 0 in case there is only one rate in array for (uint256 i=0; i<_rates.length; i++) { if (_rates[i] > _rates[maxIndex]) { maxIndex = i; } } return (_wrappers[maxIndex], _rates[maxIndex]); } /// @notice Finds the smallest rate between exchanges, needed for buy rate /// @param _wrappers Array of wrappers to compare /// @param _rates Array of rates to compare function getSmallestRate( address[] memory _wrappers, uint256[] memory _rates ) internal pure returns (address, uint) { uint256 minIndex = 0; // starting from 0 in case there is only one rate in array for (uint256 i=0; i<_rates.length; i++) { if (_rates[i] < _rates[minIndex]) { minIndex = i; } } return (_wrappers[minIndex], _rates[minIndex]); } function getDecimals(address _token) internal view returns (uint256) { if (_token == KYBER_ETH_ADDRESS) return 18; return ERC20(_token).decimals(); } function sliceUint(bytes memory bs, uint256 start) internal pure returns (uint256) { require(bs.length >= start + 32, "slicing out of range"); uint256 x; assembly { x := mload(add(bs, add(0x20, start))) } return x; } } contract SaverExchangeHelper { using SafeERC20 for ERC20; address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant WETH_ADDRESS = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address payable public constant WALLET_ID = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; address public constant DISCOUNT_ADDRESS = 0x1b14E8D511c9A4395425314f849bD737BAF8208F; address public constant SAVER_EXCHANGE_REGISTRY = 0x25dd3F51e0C3c3Ff164DDC02A8E4D65Bb9cBB12D; address public constant ERC20_PROXY_0X = 0x95E6F48254609A6ee006F7D493c8e5fB97094ceF; address public constant ZRX_ALLOWLIST_ADDR = 0x019739e288973F92bDD3c1d87178E206E51fd911; function getDecimals(address _token) internal view returns (uint256) { if (_token == KYBER_ETH_ADDRESS) return 18; return ERC20(_token).decimals(); } function getBalance(address _tokenAddr) internal view returns (uint balance) { if (_tokenAddr == KYBER_ETH_ADDRESS) { balance = address(this).balance; } else { balance = ERC20(_tokenAddr).balanceOf(address(this)); } } function approve0xProxy(address _tokenAddr, uint _amount) internal { if (_tokenAddr != KYBER_ETH_ADDRESS) { ERC20(_tokenAddr).safeApprove(address(ERC20_PROXY_0X), _amount); } } function sendLeftover(address _srcAddr, address _destAddr, address payable _to) internal { // send back any leftover ether or tokens if (address(this).balance > 0) { _to.transfer(address(this).balance); } if (getBalance(_srcAddr) > 0) { ERC20(_srcAddr).safeTransfer(_to, getBalance(_srcAddr)); } if (getBalance(_destAddr) > 0) { ERC20(_destAddr).safeTransfer(_to, getBalance(_destAddr)); } } function sliceUint(bytes memory bs, uint256 start) internal pure returns (uint256) { require(bs.length >= start + 32, "slicing out of range"); uint256 x; assembly { x := mload(add(bs, add(0x20, start))) } return x; } } contract SaverExchangeRegistry is AdminAuth { mapping(address => bool) private wrappers; constructor() public { wrappers[0x880A845A85F843a5c67DB2061623c6Fc3bB4c511] = true; wrappers[0x4c9B55f2083629A1F7aDa257ae984E03096eCD25] = true; wrappers[0x42A9237b872368E1bec4Ca8D26A928D7d39d338C] = true; } function addWrapper(address _wrapper) public onlyOwner { wrappers[_wrapper] = true; } function removeWrapper(address _wrapper) public onlyOwner { wrappers[_wrapper] = false; } function isWrapper(address _wrapper) public view returns(bool) { return wrappers[_wrapper]; } } abstract contract CEtherInterface { function mint() external virtual payable; function repayBorrow() external virtual payable; } abstract contract Cat { struct Ilk { address flip; // Liquidator uint256 chop; // Liquidation Penalty [ray] uint256 lump; // Liquidation Quantity [wad] } mapping (bytes32 => Ilk) public ilks; } abstract contract CompoundOracleInterface { function getUnderlyingPrice(address cToken) external view virtual returns (uint); } abstract contract ComptrollerInterface { function enterMarkets(address[] calldata cTokens) external virtual returns (uint256[] memory); function exitMarket(address cToken) external virtual returns (uint256); function getAssetsIn(address account) external virtual view returns (address[] memory); function markets(address account) public virtual view returns (bool, uint256); function getAccountLiquidity(address account) external virtual view returns (uint256, uint256, uint256); function claimComp(address holder) virtual public; function oracle() public virtual view returns (address); } abstract contract DSProxyInterface { /// Truffle wont compile if this isn't commented // function execute(bytes memory _code, bytes memory _data) // public virtual // payable // returns (address, bytes32); function execute(address _target, bytes memory _data) public virtual payable returns (bytes32); function setCache(address _cacheAddr) public virtual payable returns (bool); function owner() public virtual returns (address); } abstract contract GemLike { function approve(address, uint) public virtual; function transfer(address, uint) public virtual; function transferFrom(address, address, uint) public virtual; function deposit() public virtual payable; function withdraw(uint) public virtual; } abstract contract ManagerLike { function cdpCan(address, uint, address) public virtual view returns (uint); function ilks(uint) public virtual view returns (bytes32); function owns(uint) public virtual view returns (address); function urns(uint) public virtual view returns (address); function vat() public virtual view returns (address); function open(bytes32) public virtual returns (uint); function give(uint, address) public virtual; function cdpAllow(uint, address, uint) public virtual; function urnAllow(address, uint) public virtual; function frob(uint, int, int) public virtual; function frob(uint, address, int, int) public virtual; function flux(uint, address, uint) public virtual; function move(uint, address, uint) public virtual; function exit(address, uint, address, uint) public virtual; function quit(uint, address) public virtual; function enter(address, uint) public virtual; function shift(uint, uint) public virtual; } abstract contract VatLike { function can(address, address) public virtual view returns (uint); function ilks(bytes32) public virtual view returns (uint, uint, uint, uint, uint); function dai(address) public virtual view returns (uint); function urns(bytes32, address) public virtual view returns (uint, uint); function frob(bytes32, address, address, address, int, int) public virtual; function hope(address) public virtual; function move(address, address, uint) public virtual; } abstract contract GemJoinLike { function dec() public virtual returns (uint); function gem() public virtual returns (GemLike); function join(address, uint) public virtual payable; function exit(address, uint) public virtual; } abstract contract GNTJoinLike { function bags(address) public virtual view returns (address); function make(address) public virtual returns (address); } abstract contract DaiJoinLike { function vat() public virtual returns (VatLike); function dai() public virtual returns (GemLike); function join(address, uint) public virtual payable; function exit(address, uint) public virtual; } abstract contract HopeLike { function hope(address) public virtual; function nope(address) public virtual; } abstract contract EndLike { function fix(bytes32) public virtual view returns (uint); function cash(bytes32, uint) public virtual; function free(bytes32) public virtual; function pack(uint) public virtual; function skim(bytes32, address) public virtual; } abstract contract JugLike { function drip(bytes32) public virtual; } abstract contract PotLike { function chi() public virtual view returns (uint); function pie(address) public virtual view returns (uint); function drip() public virtual; function join(uint) public virtual; function exit(uint) public virtual; } abstract contract ProxyRegistryLike { function proxies(address) public virtual view returns (address); function build(address) public virtual returns (address); } abstract contract ProxyLike { function owner() public virtual view returns (address); } abstract contract DssProxyActions { function daiJoin_join(address apt, address urn, uint wad) public virtual; function transfer(address gem, address dst, uint wad) public virtual; function ethJoin_join(address apt, address urn) public virtual payable; function gemJoin_join(address apt, address urn, uint wad, bool transferFrom) public virtual payable; function hope(address obj, address usr) public virtual; function nope(address obj, address usr) public virtual; function open(address manager, bytes32 ilk, address usr) public virtual returns (uint cdp); function give(address manager, uint cdp, address usr) public virtual; function giveToProxy(address proxyRegistry, address manager, uint cdp, address dst) public virtual; function cdpAllow(address manager, uint cdp, address usr, uint ok) public virtual; function urnAllow(address manager, address usr, uint ok) public virtual; function flux(address manager, uint cdp, address dst, uint wad) public virtual; function move(address manager, uint cdp, address dst, uint rad) public virtual; function frob(address manager, uint cdp, int dink, int dart) public virtual; function frob(address manager, uint cdp, address dst, int dink, int dart) public virtual; function quit(address manager, uint cdp, address dst) public virtual; function enter(address manager, address src, uint cdp) public virtual; function shift(address manager, uint cdpSrc, uint cdpOrg) public virtual; function makeGemBag(address gemJoin) public virtual returns (address bag); function lockETH(address manager, address ethJoin, uint cdp) public virtual payable; function safeLockETH(address manager, address ethJoin, uint cdp, address owner) public virtual payable; function lockGem(address manager, address gemJoin, uint cdp, uint wad, bool transferFrom) public virtual; function safeLockGem(address manager, address gemJoin, uint cdp, uint wad, bool transferFrom, address owner) public virtual; function freeETH(address manager, address ethJoin, uint cdp, uint wad) public virtual; function freeGem(address manager, address gemJoin, uint cdp, uint wad) public virtual; function draw(address manager, address jug, address daiJoin, uint cdp, uint wad) public virtual; function wipe(address manager, address daiJoin, uint cdp, uint wad) public virtual; function safeWipe(address manager, address daiJoin, uint cdp, uint wad, address owner) public virtual; function wipeAll(address manager, address daiJoin, uint cdp) public virtual; function safeWipeAll(address manager, address daiJoin, uint cdp, address owner) public virtual; function lockETHAndDraw(address manager, address jug, address ethJoin, address daiJoin, uint cdp, uint wadD) public virtual payable; function openLockETHAndDraw(address manager, address jug, address ethJoin, address daiJoin, bytes32 ilk, uint wadD) public virtual payable returns (uint cdp); function lockGemAndDraw(address manager, address jug, address gemJoin, address daiJoin, uint cdp, uint wadC, uint wadD, bool transferFrom) public virtual; function openLockGemAndDraw(address manager, address jug, address gemJoin, address daiJoin, bytes32 ilk, uint wadC, uint wadD, bool transferFrom) public virtual returns (uint cdp); function openLockGNTAndDraw(address manager, address jug, address gntJoin, address daiJoin, bytes32 ilk, uint wadC, uint wadD) public virtual returns (address bag, uint cdp); function wipeAndFreeETH(address manager, address ethJoin, address daiJoin, uint cdp, uint wadC, uint wadD) public virtual; function wipeAllAndFreeETH(address manager, address ethJoin, address daiJoin, uint cdp, uint wadC) public virtual; function wipeAndFreeGem(address manager, address gemJoin, address daiJoin, uint cdp, uint wadC, uint wadD) public virtual; function wipeAllAndFreeGem(address manager, address gemJoin, address daiJoin, uint cdp, uint wadC) public virtual; } abstract contract DaiJoin { function vat() public virtual returns (Vat); function dai() public virtual returns (Gem); function join(address, uint) public virtual payable; function exit(address, uint) public virtual; } abstract contract DssProxyActionsDsr { function join(address daiJoin, address pot, uint wad) virtual public; function exit(address daiJoin, address pot, uint wad) virtual public; function exitAll(address daiJoin, address pot) virtual public; } interface ERC20 { function totalSupply() external view returns (uint256 supply); function balanceOf(address _owner) external view returns (uint256 balance); function transfer(address _to, uint256 _value) external returns (bool success); function transferFrom(address _from, address _to, uint256 _value) external returns (bool success); function approve(address _spender, uint256 _value) external returns (bool success); function allowance(address _owner, address _spender) external view returns (uint256 remaining); function decimals() external view returns (uint256 digits); event Approval(address indexed _owner, address indexed _spender, uint256 _value); } interface ExchangeInterface { function swapEtherToToken(uint256 _ethAmount, address _tokenAddress, uint256 _maxAmount) external payable returns (uint256, uint256); function swapTokenToEther(address _tokenAddress, uint256 _amount, uint256 _maxAmount) external returns (uint256); function swapTokenToToken(address _src, address _dest, uint256 _amount) external payable returns (uint256); function getExpectedRate(address src, address dest, uint256 srcQty) external view returns (uint256 expectedRate); } interface ExchangeInterfaceV2 { function sell(address _srcAddr, address _destAddr, uint _srcAmount) external payable returns (uint); function buy(address _srcAddr, address _destAddr, uint _destAmount) external payable returns(uint); function getSellRate(address _srcAddr, address _destAddr, uint _srcAmount) external view returns (uint); function getBuyRate(address _srcAddr, address _destAddr, uint _srcAmount) external view returns (uint); } abstract contract Faucet { function gulp(address) public virtual; } abstract contract Flipper { function bids(uint _bidId) public virtual returns (uint256, uint256, address, uint48, uint48, address, address, uint256); function tend(uint id, uint lot, uint bid) virtual external; function dent(uint id, uint lot, uint bid) virtual external; function deal(uint id) virtual external; } abstract contract GasTokenInterface is ERC20 { function free(uint256 value) public virtual returns (bool success); function freeUpTo(uint256 value) public virtual returns (uint256 freed); function freeFrom(address from, uint256 value) public virtual returns (bool success); function freeFromUpTo(address from, uint256 value) public virtual returns (uint256 freed); } abstract contract Gem { function dec() virtual public returns (uint); function gem() virtual public returns (Gem); function join(address, uint) virtual public payable; function exit(address, uint) virtual public; function approve(address, uint) virtual public; function transfer(address, uint) virtual public returns (bool); function transferFrom(address, address, uint) virtual public returns (bool); function deposit() virtual public payable; function withdraw(uint) virtual public; function allowance(address, address) virtual public returns (uint); } abstract contract GetCdps { function getCdpsAsc(address manager, address guy) external view virtual returns (uint[] memory ids, address[] memory urns, bytes32[] memory ilks); function getCdpsDesc(address manager, address guy) external view virtual returns (uint[] memory ids, address[] memory urns, bytes32[] memory ilks); } abstract contract IAToken { function redeem(uint256 _amount) external virtual; } abstract contract IAaveSubscription { function subscribe(uint128 _minRatio, uint128 _maxRatio, uint128 _optimalBoost, uint128 _optimalRepay, bool _boostEnabled) public virtual; function unsubscribe() public virtual; } abstract contract ICompoundSubscription { function subscribe(uint128 _minRatio, uint128 _maxRatio, uint128 _optimalBoost, uint128 _optimalRepay, bool _boostEnabled) public virtual; function unsubscribe() public virtual; } abstract contract ILendingPool { function flashLoan( address payable _receiver, address _reserve, uint _amount, bytes calldata _params) external virtual; function deposit(address _reserve, uint256 _amount, uint16 _referralCode) external virtual payable; function setUserUseReserveAsCollateral(address _reserve, bool _useAsCollateral) external virtual; function borrow(address _reserve, uint256 _amount, uint256 _interestRateMode, uint16 _referralCode) external virtual; function repay( address _reserve, uint256 _amount, address payable _onBehalfOf) external virtual payable; function swapBorrowRateMode(address _reserve) external virtual; function getReserves() external virtual view returns(address[] memory); /// @param _reserve underlying token address function getReserveData(address _reserve) external virtual view returns ( uint256 totalLiquidity, // reserve total liquidity uint256 availableLiquidity, // reserve available liquidity for borrowing uint256 totalBorrowsStable, // total amount of outstanding borrows at Stable rate uint256 totalBorrowsVariable, // total amount of outstanding borrows at Variable rate uint256 liquidityRate, // current deposit APY of the reserve for depositors, in Ray units. uint256 variableBorrowRate, // current variable rate APY of the reserve pool, in Ray units. uint256 stableBorrowRate, // current stable rate APY of the reserve pool, in Ray units. uint256 averageStableBorrowRate, // current average stable borrow rate uint256 utilizationRate, // expressed as total borrows/total liquidity. uint256 liquidityIndex, // cumulative liquidity index uint256 variableBorrowIndex, // cumulative variable borrow index address aTokenAddress, // aTokens contract address for the specific _reserve uint40 lastUpdateTimestamp // timestamp of the last update of reserve data ); /// @param _user users address function getUserAccountData(address _user) external virtual view returns ( uint256 totalLiquidityETH, // user aggregated deposits across all the reserves. In Wei uint256 totalCollateralETH, // user aggregated collateral across all the reserves. In Wei uint256 totalBorrowsETH, // user aggregated outstanding borrows across all the reserves. In Wei uint256 totalFeesETH, // user aggregated current outstanding fees in ETH. In Wei uint256 availableBorrowsETH, // user available amount to borrow in ETH uint256 currentLiquidationThreshold, // user current average liquidation threshold across all the collaterals deposited uint256 ltv, // user average Loan-to-Value between all the collaterals uint256 healthFactor // user current Health Factor ); /// @param _reserve underlying token address /// @param _user users address function getUserReserveData(address _reserve, address _user) external virtual view returns ( uint256 currentATokenBalance, // user current reserve aToken balance uint256 currentBorrowBalance, // user current reserve outstanding borrow balance uint256 principalBorrowBalance, // user balance of borrowed asset uint256 borrowRateMode, // user borrow rate mode either Stable or Variable uint256 borrowRate, // user current borrow rate APY uint256 liquidityRate, // user current earn rate on _reserve uint256 originationFee, // user outstanding loan origination fee uint256 variableBorrowIndex, // user variable cumulative index uint256 lastUpdateTimestamp, // Timestamp of the last data update bool usageAsCollateralEnabled // Whether the user's current reserve is enabled as a collateral ); function getReserveConfigurationData(address _reserve) external virtual view returns ( uint256 ltv, uint256 liquidationThreshold, uint256 liquidationBonus, address rateStrategyAddress, bool usageAsCollateralEnabled, bool borrowingEnabled, bool stableBorrowRateEnabled, bool isActive ); // ------------------ LendingPoolCoreData ------------------------ function getReserveATokenAddress(address _reserve) public virtual view returns (address); function getReserveConfiguration(address _reserve) external virtual view returns (uint256, uint256, uint256, bool); function getUserUnderlyingAssetBalance(address _reserve, address _user) public virtual view returns (uint256); function getReserveCurrentLiquidityRate(address _reserve) public virtual view returns (uint256); function getReserveCurrentVariableBorrowRate(address _reserve) public virtual view returns (uint256); function getReserveTotalLiquidity(address _reserve) public virtual view returns (uint256); function getReserveAvailableLiquidity(address _reserve) public virtual view returns (uint256); function getReserveTotalBorrowsVariable(address _reserve) public virtual view returns (uint256); // ---------------- LendingPoolDataProvider --------------------- function calculateUserGlobalData(address _user) public virtual view returns ( uint256 totalLiquidityBalanceETH, uint256 totalCollateralBalanceETH, uint256 totalBorrowBalanceETH, uint256 totalFeesETH, uint256 currentLtv, uint256 currentLiquidationThreshold, uint256 healthFactor, bool healthFactorBelowThreshold ); } abstract contract ILendingPoolAddressesProvider { function getLendingPool() public virtual view returns (address); function getLendingPoolCore() public virtual view returns (address payable); function getLendingPoolConfigurator() public virtual view returns (address); function getLendingPoolDataProvider() public virtual view returns (address); function getLendingPoolParametersProvider() public virtual view returns (address); function getTokenDistributor() public virtual view returns (address); function getFeeProvider() public virtual view returns (address); function getLendingPoolLiquidationManager() public virtual view returns (address); function getLendingPoolManager() public virtual view returns (address); function getPriceOracle() public virtual view returns (address); function getLendingRateOracle() public virtual view returns (address); } abstract contract ILoanShifter { function getLoanAmount(uint, address) public view virtual returns(uint); function getUnderlyingAsset(address _addr) public view virtual returns (address); } abstract contract IPriceOracleGetterAave { function getAssetPrice(address _asset) external virtual view returns (uint256); function getAssetsPrices(address[] calldata _assets) external virtual view returns(uint256[] memory); function getSourceOfAsset(address _asset) external virtual view returns(address); function getFallbackOracle() external virtual view returns(address); } abstract contract ITokenInterface is ERC20 { function assetBalanceOf(address _owner) public virtual view returns (uint256); function mint(address receiver, uint256 depositAmount) external virtual returns (uint256 mintAmount); function burn(address receiver, uint256 burnAmount) external virtual returns (uint256 loanAmountPaid); function tokenPrice() public virtual view returns (uint256 price); } abstract contract Join { bytes32 public ilk; function dec() virtual public view returns (uint); function gem() virtual public view returns (Gem); function join(address, uint) virtual public payable; function exit(address, uint) virtual public; } abstract contract Jug { struct Ilk { uint256 duty; uint256 rho; } mapping (bytes32 => Ilk) public ilks; function drip(bytes32) public virtual returns (uint); } abstract contract KyberNetworkProxyInterface { function maxGasPrice() external virtual view returns (uint256); function getUserCapInWei(address user) external virtual view returns (uint256); function getUserCapInTokenWei(address user, ERC20 token) external virtual view returns (uint256); function enabled() external virtual view returns (bool); function info(bytes32 id) external virtual view returns (uint256); function getExpectedRate(ERC20 src, ERC20 dest, uint256 srcQty) public virtual view returns (uint256 expectedRate, uint256 slippageRate); function tradeWithHint( ERC20 src, uint256 srcAmount, ERC20 dest, address destAddress, uint256 maxDestAmount, uint256 minConversionRate, address walletId, bytes memory hint ) public virtual payable returns (uint256); function trade( ERC20 src, uint256 srcAmount, ERC20 dest, address destAddress, uint256 maxDestAmount, uint256 minConversionRate, address walletId ) public virtual payable returns (uint256); function swapEtherToToken(ERC20 token, uint256 minConversionRate) external virtual payable returns (uint256); function swapTokenToEther(ERC20 token, uint256 tokenQty, uint256 minRate) external virtual payable returns (uint256); function swapTokenToToken(ERC20 src, uint256 srcAmount, ERC20 dest, uint256 minConversionRate) public virtual returns (uint256); } abstract contract Manager { function last(address) virtual public returns (uint); function cdpCan(address, uint, address) virtual public view returns (uint); function ilks(uint) virtual public view returns (bytes32); function owns(uint) virtual public view returns (address); function urns(uint) virtual public view returns (address); function vat() virtual public view returns (address); function open(bytes32, address) virtual public returns (uint); function give(uint, address) virtual public; function cdpAllow(uint, address, uint) virtual public; function urnAllow(address, uint) virtual public; function frob(uint, int, int) virtual public; function flux(uint, address, uint) virtual public; function move(uint, address, uint) virtual public; function exit(address, uint, address, uint) virtual public; function quit(uint, address) virtual public; function enter(address, uint) virtual public; function shift(uint, uint) virtual public; } abstract contract OasisInterface { function getBuyAmount(address tokenToBuy, address tokenToPay, uint256 amountToPay) external virtual view returns (uint256 amountBought); function getPayAmount(address tokenToPay, address tokenToBuy, uint256 amountToBuy) public virtual view returns (uint256 amountPaid); function sellAllAmount(address pay_gem, uint256 pay_amt, address buy_gem, uint256 min_fill_amount) public virtual returns (uint256 fill_amt); function buyAllAmount(address buy_gem, uint256 buy_amt, address pay_gem, uint256 max_fill_amount) public virtual returns (uint256 fill_amt); } abstract contract Osm { mapping(address => uint256) public bud; function peep() external view virtual returns (bytes32, bool); } abstract contract OsmMom { mapping (bytes32 => address) public osms; } abstract contract OtcInterface { function buyAllAmount(address, uint256, address, uint256) public virtual returns (uint256); function getPayAmount(address, address, uint256) public virtual view returns (uint256); function getBuyAmount(address, address, uint256) public virtual view returns (uint256); } abstract contract PipInterface { function read() public virtual returns (bytes32); } abstract contract ProxyRegistryInterface { function proxies(address _owner) public virtual view returns (address); function build(address) public virtual returns (address); } abstract contract SaverExchangeInterface { function getBestPrice( uint256 _amount, address _srcToken, address _destToken, uint256 _exchangeType ) public view virtual returns (address, uint256); } abstract contract Spotter { struct Ilk { PipInterface pip; uint256 mat; } mapping (bytes32 => Ilk) public ilks; uint256 public par; } abstract contract TokenInterface { function allowance(address, address) public virtual returns (uint256); function balanceOf(address) public virtual returns (uint256); function approve(address, uint256) public virtual; function transfer(address, uint256) public virtual returns (bool); function transferFrom(address, address, uint256) public virtual returns (bool); function deposit() public virtual payable; function withdraw(uint256) public virtual; } abstract contract UniswapExchangeInterface { function getEthToTokenInputPrice(uint256 eth_sold) external virtual view returns (uint256 tokens_bought); function getEthToTokenOutputPrice(uint256 tokens_bought) external virtual view returns (uint256 eth_sold); function getTokenToEthInputPrice(uint256 tokens_sold) external virtual view returns (uint256 eth_bought); function getTokenToEthOutputPrice(uint256 eth_bought) external virtual view returns (uint256 tokens_sold); function tokenToEthTransferInput( uint256 tokens_sold, uint256 min_eth, uint256 deadline, address recipient ) external virtual returns (uint256 eth_bought); function ethToTokenTransferInput(uint256 min_tokens, uint256 deadline, address recipient) external virtual payable returns (uint256 tokens_bought); function tokenToTokenTransferInput( uint256 tokens_sold, uint256 min_tokens_bought, uint256 min_eth_bought, uint256 deadline, address recipient, address token_addr ) external virtual returns (uint256 tokens_bought); function ethToTokenTransferOutput( uint256 tokens_bought, uint256 deadline, address recipient ) external virtual payable returns (uint256 eth_sold); function tokenToEthTransferOutput( uint256 eth_bought, uint256 max_tokens, uint256 deadline, address recipient ) external virtual returns (uint256 tokens_sold); function tokenToTokenTransferOutput( uint256 tokens_bought, uint256 max_tokens_sold, uint256 max_eth_sold, uint256 deadline, address recipient, address token_addr ) external virtual returns (uint256 tokens_sold); } abstract contract UniswapFactoryInterface { function getExchange(address token) external view virtual returns (address exchange); } abstract contract Vat { struct Urn { uint256 ink; // Locked Collateral [wad] uint256 art; // Normalised Debt [wad] } struct Ilk { uint256 Art; // Total Normalised Debt [wad] uint256 rate; // Accumulated Rates [ray] uint256 spot; // Price with Safety Margin [ray] uint256 line; // Debt Ceiling [rad] uint256 dust; // Urn Debt Floor [rad] } mapping (bytes32 => mapping (address => Urn )) public urns; mapping (bytes32 => Ilk) public ilks; mapping (bytes32 => mapping (address => uint)) public gem; // [wad] function can(address, address) virtual public view returns (uint); function dai(address) virtual public view returns (uint); function frob(bytes32, address, address, address, int, int) virtual public; function hope(address) virtual public; function move(address, address, uint) virtual public; function fork(bytes32, address, address, int, int) virtual public; } contract DefisaverLogger { event LogEvent( address indexed contractAddress, address indexed caller, string indexed logName, bytes data ); // solhint-disable-next-line func-name-mixedcase function Log(address _contract, address _caller, string memory _logName, bytes memory _data) public { emit LogEvent(_contract, _caller, _logName, _data); } } contract MCDMonitorProxyV2 is AdminAuth { uint public CHANGE_PERIOD; address public monitor; address public newMonitor; address public lastMonitor; uint public changeRequestedTimestamp; mapping(address => bool) public allowed; event MonitorChangeInitiated(address oldMonitor, address newMonitor); event MonitorChangeCanceled(); event MonitorChangeFinished(address monitor); event MonitorChangeReverted(address monitor); // if someone who is allowed become malicious, owner can't be changed modifier onlyAllowed() { require(allowed[msg.sender] || msg.sender == owner); _; } modifier onlyMonitor() { require (msg.sender == monitor); _; } constructor(uint _changePeriod) public { CHANGE_PERIOD = _changePeriod * 1 days; } /// @notice Only monitor contract is able to call execute on users proxy /// @param _owner Address of cdp owner (users DSProxy address) /// @param _saverProxy Address of MCDSaverProxy /// @param _data Data to send to MCDSaverProxy function callExecute(address _owner, address _saverProxy, bytes memory _data) public payable onlyMonitor { // execute reverts if calling specific method fails DSProxyInterface(_owner).execute{value: msg.value}(_saverProxy, _data); // return if anything left if (address(this).balance > 0) { msg.sender.transfer(address(this).balance); } } /// @notice Allowed users are able to set Monitor contract without any waiting period first time /// @param _monitor Address of Monitor contract function setMonitor(address _monitor) public onlyAllowed { require(monitor == address(0)); monitor = _monitor; } /// @notice Allowed users are able to start procedure for changing monitor /// @dev after CHANGE_PERIOD needs to call confirmNewMonitor to actually make a change /// @param _newMonitor address of new monitor function changeMonitor(address _newMonitor) public onlyAllowed { require(changeRequestedTimestamp == 0); changeRequestedTimestamp = now; lastMonitor = monitor; newMonitor = _newMonitor; emit MonitorChangeInitiated(lastMonitor, newMonitor); } /// @notice At any point allowed users are able to cancel monitor change function cancelMonitorChange() public onlyAllowed { require(changeRequestedTimestamp > 0); changeRequestedTimestamp = 0; newMonitor = address(0); emit MonitorChangeCanceled(); } /// @notice Anyone is able to confirm new monitor after CHANGE_PERIOD if process is started function confirmNewMonitor() public onlyAllowed { require((changeRequestedTimestamp + CHANGE_PERIOD) < now); require(changeRequestedTimestamp != 0); require(newMonitor != address(0)); monitor = newMonitor; newMonitor = address(0); changeRequestedTimestamp = 0; emit MonitorChangeFinished(monitor); } /// @notice Its possible to revert monitor to last used monitor function revertMonitor() public onlyAllowed { require(lastMonitor != address(0)); monitor = lastMonitor; emit MonitorChangeReverted(monitor); } /// @notice Allowed users are able to add new allowed user /// @param _user Address of user that will be allowed function addAllowed(address _user) public onlyAllowed { allowed[_user] = true; } /// @notice Allowed users are able to remove allowed user /// @dev owner is always allowed even if someone tries to remove it from allowed mapping /// @param _user Address of allowed user function removeAllowed(address _user) public onlyAllowed { allowed[_user] = false; } function setChangePeriod(uint _periodInDays) public onlyAllowed { require(_periodInDays * 1 days > CHANGE_PERIOD); CHANGE_PERIOD = _periodInDays * 1 days; } /// @notice In case something is left in contract, owner is able to withdraw it /// @param _token address of token to withdraw balance function withdrawToken(address _token) public onlyOwner { uint balance = ERC20(_token).balanceOf(address(this)); ERC20(_token).transfer(msg.sender, balance); } /// @notice In case something is left in contract, owner is able to withdraw it function withdrawEth() public onlyOwner { uint balance = address(this).balance; msg.sender.transfer(balance); } } contract MCDPriceVerifier is AdminAuth { OsmMom public osmMom = OsmMom(0x76416A4d5190d071bfed309861527431304aA14f); Manager public manager = Manager(0x5ef30b9986345249bc32d8928B7ee64DE9435E39); mapping(address => bool) public authorized; function verifyVaultNextPrice(uint _nextPrice, uint _cdpId) public view returns(bool) { require(authorized[msg.sender]); bytes32 ilk = manager.ilks(_cdpId); return verifyNextPrice(_nextPrice, ilk); } function verifyNextPrice(uint _nextPrice, bytes32 _ilk) public view returns(bool) { require(authorized[msg.sender]); address osmAddress = osmMom.osms(_ilk); uint whitelisted = Osm(osmAddress).bud(address(this)); // If contracts doesn't have access return true if (whitelisted != 1) return true; (bytes32 price, bool has) = Osm(osmAddress).peep(); return has ? uint(price) == _nextPrice : false; } function setAuthorized(address _address, bool _allowed) public onlyOwner { authorized[_address] = _allowed; } } abstract contract StaticV2 { enum Method { Boost, Repay } struct CdpHolder { uint128 minRatio; uint128 maxRatio; uint128 optimalRatioBoost; uint128 optimalRatioRepay; address owner; uint cdpId; bool boostEnabled; bool nextPriceEnabled; } struct SubPosition { uint arrPos; bool subscribed; } } contract SubscriptionsInterfaceV2 { function subscribe(uint _cdpId, uint128 _minRatio, uint128 _maxRatio, uint128 _optimalBoost, uint128 _optimalRepay, bool _boostEnabled, bool _nextPriceEnabled) external {} function unsubscribe(uint _cdpId) external {} } contract SubscriptionsProxyV2 { address public constant MONITOR_PROXY_ADDRESS = 0x7456f4218874eAe1aF8B83a64848A1B89fEB7d7C; address public constant OLD_SUBSCRIPTION = 0x83152CAA0d344a2Fd428769529e2d490A88f4393; address public constant FACTORY_ADDRESS = 0x5a15566417e6C1c9546523066500bDDBc53F88C7; function migrate(uint _cdpId, uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled, bool _nextPriceEnabled, address _subscriptions) public { SubscriptionsInterfaceV2(OLD_SUBSCRIPTION).unsubscribe(_cdpId); subscribe(_cdpId, _minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled, _nextPriceEnabled, _subscriptions); } function subscribe(uint _cdpId, uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled, bool _nextPriceEnabled, address _subscriptions) public { address currAuthority = address(DSAuth(address(this)).authority()); DSGuard guard = DSGuard(currAuthority); if (currAuthority == address(0)) { guard = DSGuardFactory(FACTORY_ADDRESS).newGuard(); DSAuth(address(this)).setAuthority(DSAuthority(address(guard))); } guard.permit(MONITOR_PROXY_ADDRESS, address(this), bytes4(keccak256("execute(address,bytes)"))); SubscriptionsInterfaceV2(_subscriptions).subscribe(_cdpId, _minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled, _nextPriceEnabled); } function update(uint _cdpId, uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled, bool _nextPriceEnabled, address _subscriptions) public { SubscriptionsInterfaceV2(_subscriptions).subscribe(_cdpId, _minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled, _nextPriceEnabled); } function unsubscribe(uint _cdpId, address _subscriptions) public { SubscriptionsInterfaceV2(_subscriptions).unsubscribe(_cdpId); } } contract SubscriptionsV2 is AdminAuth, StaticV2 { bytes32 internal constant ETH_ILK = 0x4554482d41000000000000000000000000000000000000000000000000000000; bytes32 internal constant BAT_ILK = 0x4241542d41000000000000000000000000000000000000000000000000000000; address public constant MANAGER_ADDRESS = 0x5ef30b9986345249bc32d8928B7ee64DE9435E39; address public constant VAT_ADDRESS = 0x35D1b3F3D7966A1DFe207aa4514C12a259A0492B; address public constant SPOTTER_ADDRESS = 0x65C79fcB50Ca1594B025960e539eD7A9a6D434A3; CdpHolder[] public subscribers; mapping (uint => SubPosition) public subscribersPos; mapping (bytes32 => uint) public minLimits; uint public changeIndex; Manager public manager = Manager(MANAGER_ADDRESS); Vat public vat = Vat(VAT_ADDRESS); Spotter public spotter = Spotter(SPOTTER_ADDRESS); MCDSaverProxy public saverProxy; event Subscribed(address indexed owner, uint cdpId); event Unsubscribed(address indexed owner, uint cdpId); event Updated(address indexed owner, uint cdpId); event ParamUpdates(address indexed owner, uint cdpId, uint128, uint128, uint128, uint128, bool boostEnabled); /// @param _saverProxy Address of the MCDSaverProxy contract constructor(address _saverProxy) public { saverProxy = MCDSaverProxy(payable(_saverProxy)); minLimits[ETH_ILK] = 1700000000000000000; minLimits[BAT_ILK] = 1700000000000000000; } /// @dev Called by the DSProxy contract which owns the CDP /// @notice Adds the users CDP in the list of subscriptions so it can be monitored /// @param _cdpId Id of the CDP /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalBoost Ratio amount which boost should target /// @param _optimalRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled /// @param _nextPriceEnabled Boolean determing if we can use nextPrice for this cdp function subscribe(uint _cdpId, uint128 _minRatio, uint128 _maxRatio, uint128 _optimalBoost, uint128 _optimalRepay, bool _boostEnabled, bool _nextPriceEnabled) external { require(isOwner(msg.sender, _cdpId), "Must be called by Cdp owner"); // if boost is not enabled, set max ratio to max uint uint128 localMaxRatio = _boostEnabled ? _maxRatio : uint128(-1); require(checkParams(manager.ilks(_cdpId), _minRatio, localMaxRatio), "Must be correct params"); SubPosition storage subInfo = subscribersPos[_cdpId]; CdpHolder memory subscription = CdpHolder({ minRatio: _minRatio, maxRatio: localMaxRatio, optimalRatioBoost: _optimalBoost, optimalRatioRepay: _optimalRepay, owner: msg.sender, cdpId: _cdpId, boostEnabled: _boostEnabled, nextPriceEnabled: _nextPriceEnabled }); changeIndex++; if (subInfo.subscribed) { subscribers[subInfo.arrPos] = subscription; emit Updated(msg.sender, _cdpId); emit ParamUpdates(msg.sender, _cdpId, _minRatio, localMaxRatio, _optimalBoost, _optimalRepay, _boostEnabled); } else { subscribers.push(subscription); subInfo.arrPos = subscribers.length - 1; subInfo.subscribed = true; emit Subscribed(msg.sender, _cdpId); } } /// @notice Called by the users DSProxy /// @dev Owner who subscribed cancels his subscription function unsubscribe(uint _cdpId) external { require(isOwner(msg.sender, _cdpId), "Must be called by Cdp owner"); _unsubscribe(_cdpId); } /// @dev Checks if the _owner is the owner of the CDP function isOwner(address _owner, uint _cdpId) internal view returns (bool) { return getOwner(_cdpId) == _owner; } /// @dev Checks limit for minimum ratio and if minRatio is bigger than max function checkParams(bytes32 _ilk, uint128 _minRatio, uint128 _maxRatio) internal view returns (bool) { if (_minRatio < minLimits[_ilk]) { return false; } if (_minRatio > _maxRatio) { return false; } return true; } /// @dev Internal method to remove a subscriber from the list function _unsubscribe(uint _cdpId) internal { require(subscribers.length > 0, "Must have subscribers in the list"); SubPosition storage subInfo = subscribersPos[_cdpId]; require(subInfo.subscribed, "Must first be subscribed"); uint lastCdpId = subscribers[subscribers.length - 1].cdpId; SubPosition storage subInfo2 = subscribersPos[lastCdpId]; subInfo2.arrPos = subInfo.arrPos; subscribers[subInfo.arrPos] = subscribers[subscribers.length - 1]; subscribers.pop(); changeIndex++; subInfo.subscribed = false; subInfo.arrPos = 0; emit Unsubscribed(msg.sender, _cdpId); } /// @notice Returns an address that owns the CDP /// @param _cdpId Id of the CDP function getOwner(uint _cdpId) public view returns(address) { return manager.owns(_cdpId); } /// @notice Helper method for the front to get all the info about the subscribed CDP function getSubscribedInfo(uint _cdpId) public view returns(bool, uint128, uint128, uint128, uint128, address, uint coll, uint debt) { SubPosition memory subInfo = subscribersPos[_cdpId]; if (!subInfo.subscribed) return (false, 0, 0, 0, 0, address(0), 0, 0); (coll, debt) = saverProxy.getCdpInfo(manager, _cdpId, manager.ilks(_cdpId)); CdpHolder memory subscriber = subscribers[subInfo.arrPos]; return ( true, subscriber.minRatio, subscriber.maxRatio, subscriber.optimalRatioRepay, subscriber.optimalRatioBoost, subscriber.owner, coll, debt ); } function getCdpHolder(uint _cdpId) public view returns (bool subscribed, CdpHolder memory) { SubPosition memory subInfo = subscribersPos[_cdpId]; if (!subInfo.subscribed) return (false, CdpHolder(0, 0, 0, 0, address(0), 0, false, false)); CdpHolder memory subscriber = subscribers[subInfo.arrPos]; return (true, subscriber); } /// @notice Helper method for the front to get the information about the ilk of a CDP function getIlkInfo(bytes32 _ilk, uint _cdpId) public view returns(bytes32 ilk, uint art, uint rate, uint spot, uint line, uint dust, uint mat, uint par) { // send either ilk or cdpId if (_ilk == bytes32(0)) { _ilk = manager.ilks(_cdpId); } ilk = _ilk; (,mat) = spotter.ilks(_ilk); par = spotter.par(); (art, rate, spot, line, dust) = vat.ilks(_ilk); } /// @notice Helper method to return all the subscribed CDPs function getSubscribers() public view returns (CdpHolder[] memory) { return subscribers; } /// @notice Helper method to return all the subscribed CDPs function getSubscribersByPage(uint _page, uint _perPage) public view returns (CdpHolder[] memory) { CdpHolder[] memory holders = new CdpHolder[](_perPage); uint start = _page * _perPage; uint end = start + _perPage; uint count = 0; for (uint i=start; i<end; i++) { holders[count] = subscribers[i]; count++; } return holders; } ////////////// ADMIN METHODS /////////////////// /// @notice Admin function to change a min. limit for an asset function changeMinRatios(bytes32 _ilk, uint _newRatio) public onlyOwner { minLimits[_ilk] = _newRatio; } /// @notice Admin function to unsubscribe a CDP function unsubscribeByAdmin(uint _cdpId) public onlyOwner { SubPosition storage subInfo = subscribersPos[_cdpId]; if (subInfo.subscribed) { _unsubscribe(_cdpId); } } } contract BidProxy { // address public constant ETH_FLIPPER = 0xd8a04F5412223F513DC55F839574430f5EC15531; // address public constant BAT_FLIPPER = 0xaA745404d55f88C108A28c86abE7b5A1E7817c07; // address public constant DAI_JOIN = 0x9759A6Ac90977b93B58547b4A71c78317f391A28; // address public constant ETH_JOIN = 0x2F0b23f53734252Bda2277357e97e1517d6B042A; // address public constant BAT_JOIN = 0x3D0B1912B66114d4096F48A8CEe3A56C231772cA; // bytes32 public constant BAT_ILK = 0x4241542d41000000000000000000000000000000000000000000000000000000; // bytes32 public constant ETH_ILK = 0x4554482d41000000000000000000000000000000000000000000000000000000; // address public constant SAVER_EXCHANGE = 0x606e9758a39d2d7fA7e70BC68E6E7D9b02948962; // function daiBid(uint _bidId, bool _isEth, uint _amount) public { // uint tendAmount = _amount * (10 ** 27); // address flipper = _isEth ? ETH_FLIPPER : BAT_FLIPPER; // joinDai(_amount); // (, uint lot, , , , , , ) = Flipper(flipper).bids(_bidId); // Vat(VAT_ADDRESS).hope(flipper); // Flipper(flipper).tend(_bidId, lot, tendAmount); // } // function collateralBid(uint _bidId, bool _isEth, uint _amount) public { // address flipper = _isEth ? ETH_FLIPPER : BAT_FLIPPER; // uint bid; // (bid, , , , , , , ) = Flipper(flipper).bids(_bidId); // joinDai(bid / (10**27)); // Vat(VAT_ADDRESS).hope(flipper); // Flipper(flipper).dent(_bidId, _amount, bid); // } // function closeBid(uint _bidId, bool _isEth) public { // address flipper = _isEth ? ETH_FLIPPER : BAT_FLIPPER; // address join = _isEth ? ETH_JOIN : BAT_JOIN; // bytes32 ilk = _isEth ? ETH_ILK : BAT_ILK; // Flipper(flipper).deal(_bidId); // uint amount = Vat(VAT_ADDRESS).gem(ilk, address(this)) / (10**27); // Vat(VAT_ADDRESS).hope(join); // Gem(join).exit(msg.sender, amount); // } // function closeBidAndExchange( // uint _bidId, // bool _isEth, // uint256[4] memory _data, // address _exchangeAddress, // bytes memory _callData // ) // public { // address flipper = _isEth ? ETH_FLIPPER : BAT_FLIPPER; // address join = _isEth ? ETH_JOIN : BAT_JOIN; // (uint bidAmount, , , , , , , ) = Flipper(flipper).bids(_bidId); // Flipper(flipper).deal(_bidId); // Vat(VAT_ADDRESS).hope(join); // Gem(join).exit(address(this), (bidAmount / 10**27)); // address srcToken = _isEth ? KYBER_ETH_ADDRESS : address(Gem(join).gem()); // uint daiAmount = swap( // _data, // srcToken, // DAI_ADDRESS, // _exchangeAddress, // _callData // ); // ERC20(DAI_ADDRESS).transfer(msg.sender, daiAmount); // } // function exitCollateral(bool _isEth) public { // address join = _isEth ? ETH_JOIN : BAT_JOIN; // bytes32 ilk = _isEth ? ETH_ILK : BAT_ILK; // uint amount = Vat(VAT_ADDRESS).gem(ilk, address(this)); // Vat(VAT_ADDRESS).hope(join); // Gem(join).exit(msg.sender, amount); // } // function exitDai() public { // uint amount = Vat(VAT_ADDRESS).dai(address(this)) / (10**27); // Vat(VAT_ADDRESS).hope(DAI_JOIN); // Gem(DAI_JOIN).exit(msg.sender, amount); // } // function withdrawToken(address _token) public { // uint balance = ERC20(_token).balanceOf(address(this)); // ERC20(_token).transfer(msg.sender, balance); // } // function withdrawEth() public { // uint balance = address(this).balance; // msg.sender.transfer(balance); // } // function joinDai(uint _amount) internal { // uint amountInVat = Vat(VAT_ADDRESS).dai(address(this)) / (10**27); // if (_amount > amountInVat) { // uint amountDiff = (_amount - amountInVat) + 1; // ERC20(DAI_ADDRESS).transferFrom(msg.sender, address(this), amountDiff); // ERC20(DAI_ADDRESS).approve(DAI_JOIN, amountDiff); // Join(DAI_JOIN).join(address(this), amountDiff); // } // } } abstract contract IMCDSubscriptions { function unsubscribe(uint256 _cdpId) external virtual ; function subscribersPos(uint256 _cdpId) external virtual returns (uint256, bool); } abstract contract GemLike { function approve(address, uint256) public virtual; function transfer(address, uint256) public virtual; function transferFrom(address, address, uint256) public virtual; function deposit() public virtual payable; function withdraw(uint256) public virtual; } abstract contract ManagerLike { function cdpCan(address, uint256, address) public virtual view returns (uint256); function ilks(uint256) public virtual view returns (bytes32); function owns(uint256) public virtual view returns (address); function urns(uint256) public virtual view returns (address); function vat() public virtual view returns (address); function open(bytes32, address) public virtual returns (uint256); function give(uint256, address) public virtual; function cdpAllow(uint256, address, uint256) public virtual; function urnAllow(address, uint256) public virtual; function frob(uint256, int256, int256) public virtual; function flux(uint256, address, uint256) public virtual; function move(uint256, address, uint256) public virtual; function exit(address, uint256, address, uint256) public virtual; function quit(uint256, address) public virtual; function enter(address, uint256) public virtual; function shift(uint256, uint256) public virtual; } abstract contract VatLike { function can(address, address) public virtual view returns (uint256); function ilks(bytes32) public virtual view returns (uint256, uint256, uint256, uint256, uint256); function dai(address) public virtual view returns (uint256); function urns(bytes32, address) public virtual view returns (uint256, uint256); function frob(bytes32, address, address, address, int256, int256) public virtual; function hope(address) public virtual; function move(address, address, uint256) public virtual; } abstract contract GemJoinLike { function dec() public virtual returns (uint256); function gem() public virtual returns (GemLike); function join(address, uint256) public virtual payable; function exit(address, uint256) public virtual; } abstract contract GNTJoinLike { function bags(address) public virtual view returns (address); function make(address) public virtual returns (address); } abstract contract DaiJoinLike { function vat() public virtual returns (VatLike); function dai() public virtual returns (GemLike); function join(address, uint256) public virtual payable; function exit(address, uint256) public virtual; } abstract contract HopeLike { function hope(address) public virtual; function nope(address) public virtual; } abstract contract ProxyRegistryInterface { function build(address) public virtual returns (address); } abstract contract EndLike { function fix(bytes32) public virtual view returns (uint256); function cash(bytes32, uint256) public virtual; function free(bytes32) public virtual; function pack(uint256) public virtual; function skim(bytes32, address) public virtual; } abstract contract JugLike { function drip(bytes32) public virtual returns (uint256); } abstract contract PotLike { function pie(address) public virtual view returns (uint256); function drip() public virtual returns (uint256); function join(uint256) public virtual; function exit(uint256) public virtual; } abstract contract ProxyRegistryLike { function proxies(address) public virtual view returns (address); function build(address) public virtual returns (address); } abstract contract ProxyLike { function owner() public virtual view returns (address); } contract Common { uint256 constant RAY = 10**27; // Internal functions function mul(uint256 x, uint256 y) internal pure returns (uint256 z) { require(y == 0 || (z = x * y) / y == x, "mul-overflow"); } // Public functions // solhint-disable-next-line func-name-mixedcase function daiJoin_join(address apt, address urn, uint256 wad) public { // Gets DAI from the user's wallet DaiJoinLike(apt).dai().transferFrom(msg.sender, address(this), wad); // Approves adapter to take the DAI amount DaiJoinLike(apt).dai().approve(apt, wad); // Joins DAI into the vat DaiJoinLike(apt).join(urn, wad); } } contract MCDCreateProxyActions is Common { // Internal functions function sub(uint256 x, uint256 y) internal pure returns (uint256 z) { require((z = x - y) <= x, "sub-overflow"); } function toInt(uint256 x) internal pure returns (int256 y) { y = int256(x); require(y >= 0, "int-overflow"); } function toRad(uint256 wad) internal pure returns (uint256 rad) { rad = mul(wad, 10**27); } function convertTo18(address gemJoin, uint256 amt) internal returns (uint256 wad) { // For those collaterals that have less than 18 decimals precision we need to do the conversion before passing to frob function // Adapters will automatically handle the difference of precision wad = mul(amt, 10**(18 - GemJoinLike(gemJoin).dec())); } function _getDrawDart(address vat, address jug, address urn, bytes32 ilk, uint256 wad) internal returns (int256 dart) { // Updates stability fee rate uint256 rate = JugLike(jug).drip(ilk); // Gets DAI balance of the urn in the vat uint256 dai = VatLike(vat).dai(urn); // If there was already enough DAI in the vat balance, just exits it without adding more debt if (dai < mul(wad, RAY)) { // Calculates the needed dart so together with the existing dai in the vat is enough to exit wad amount of DAI tokens dart = toInt(sub(mul(wad, RAY), dai) / rate); // This is neeeded due lack of precision. It might need to sum an extra dart wei (for the given DAI wad amount) dart = mul(uint256(dart), rate) < mul(wad, RAY) ? dart + 1 : dart; } } function _getWipeDart(address vat, uint256 dai, address urn, bytes32 ilk) internal view returns (int256 dart) { // Gets actual rate from the vat (, uint256 rate, , , ) = VatLike(vat).ilks(ilk); // Gets actual art value of the urn (, uint256 art) = VatLike(vat).urns(ilk, urn); // Uses the whole dai balance in the vat to reduce the debt dart = toInt(dai / rate); // Checks the calculated dart is not higher than urn.art (total debt), otherwise uses its value dart = uint256(dart) <= art ? -dart : -toInt(art); } function _getWipeAllWad(address vat, address usr, address urn, bytes32 ilk) internal view returns (uint256 wad) { // Gets actual rate from the vat (, uint256 rate, , , ) = VatLike(vat).ilks(ilk); // Gets actual art value of the urn (, uint256 art) = VatLike(vat).urns(ilk, urn); // Gets actual dai amount in the urn uint256 dai = VatLike(vat).dai(usr); uint256 rad = sub(mul(art, rate), dai); wad = rad / RAY; // If the rad precision has some dust, it will need to request for 1 extra wad wei wad = mul(wad, RAY) < rad ? wad + 1 : wad; } // Public functions function transfer(address gem, address dst, uint256 wad) public { GemLike(gem).transfer(dst, wad); } // solhint-disable-next-line func-name-mixedcase function ethJoin_join(address apt, address urn) public payable { // Wraps ETH in WETH GemJoinLike(apt).gem().deposit{value: msg.value}(); // Approves adapter to take the WETH amount GemJoinLike(apt).gem().approve(address(apt), msg.value); // Joins WETH collateral into the vat GemJoinLike(apt).join(urn, msg.value); } // solhint-disable-next-line func-name-mixedcase function gemJoin_join(address apt, address urn, uint256 wad, bool transferFrom) public { // Only executes for tokens that have approval/transferFrom implementation if (transferFrom) { // Gets token from the user's wallet GemJoinLike(apt).gem().transferFrom(msg.sender, address(this), wad); // Approves adapter to take the token amount GemJoinLike(apt).gem().approve(apt, wad); } // Joins token collateral into the vat GemJoinLike(apt).join(urn, wad); } function hope(address obj, address usr) public { HopeLike(obj).hope(usr); } function nope(address obj, address usr) public { HopeLike(obj).nope(usr); } function open(address manager, bytes32 ilk, address usr) public returns (uint256 cdp) { cdp = ManagerLike(manager).open(ilk, usr); } function give(address manager, uint256 cdp, address usr) public { ManagerLike(manager).give(cdp, usr); } function move(address manager, uint256 cdp, address dst, uint256 rad) public { ManagerLike(manager).move(cdp, dst, rad); } function frob(address manager, uint256 cdp, int256 dink, int256 dart) public { ManagerLike(manager).frob(cdp, dink, dart); } function lockETH(address manager, address ethJoin, uint256 cdp) public payable { // Receives ETH amount, converts it to WETH and joins it into the vat ethJoin_join(ethJoin, address(this)); // Locks WETH amount into the CDP VatLike(ManagerLike(manager).vat()).frob( ManagerLike(manager).ilks(cdp), ManagerLike(manager).urns(cdp), address(this), address(this), toInt(msg.value), 0 ); } function lockGem(address manager, address gemJoin, uint256 cdp, uint256 wad, bool transferFrom) public { // Takes token amount from user's wallet and joins into the vat gemJoin_join(gemJoin, address(this), wad, transferFrom); // Locks token amount into the CDP VatLike(ManagerLike(manager).vat()).frob( ManagerLike(manager).ilks(cdp), ManagerLike(manager).urns(cdp), address(this), address(this), toInt(convertTo18(gemJoin, wad)), 0 ); } function draw(address manager, address jug, address daiJoin, uint256 cdp, uint256 wad) public { address urn = ManagerLike(manager).urns(cdp); address vat = ManagerLike(manager).vat(); bytes32 ilk = ManagerLike(manager).ilks(cdp); // Generates debt in the CDP frob(manager, cdp, 0, _getDrawDart(vat, jug, urn, ilk, wad)); // Moves the DAI amount (balance in the vat in rad) to proxy's address move(manager, cdp, address(this), toRad(wad)); // Allows adapter to access to proxy's DAI balance in the vat if (VatLike(vat).can(address(this), address(daiJoin)) == 0) { VatLike(vat).hope(daiJoin); } // Exits DAI to the user's wallet as a token DaiJoinLike(daiJoin).exit(msg.sender, wad); } function lockETHAndDraw( address manager, address jug, address ethJoin, address daiJoin, uint256 cdp, uint256 wadD ) public payable { address urn = ManagerLike(manager).urns(cdp); address vat = ManagerLike(manager).vat(); bytes32 ilk = ManagerLike(manager).ilks(cdp); // Receives ETH amount, converts it to WETH and joins it into the vat ethJoin_join(ethJoin, urn); // Locks WETH amount into the CDP and generates debt frob(manager, cdp, toInt(msg.value), _getDrawDart(vat, jug, urn, ilk, wadD)); // Moves the DAI amount (balance in the vat in rad) to proxy's address move(manager, cdp, address(this), toRad(wadD)); // Allows adapter to access to proxy's DAI balance in the vat if (VatLike(vat).can(address(this), address(daiJoin)) == 0) { VatLike(vat).hope(daiJoin); } // Exits DAI to the user's wallet as a token DaiJoinLike(daiJoin).exit(msg.sender, wadD); } function openLockETHAndDraw( address manager, address jug, address ethJoin, address daiJoin, bytes32 ilk, uint256 wadD, address owner ) public payable returns (uint256 cdp) { cdp = open(manager, ilk, address(this)); lockETHAndDraw(manager, jug, ethJoin, daiJoin, cdp, wadD); give(manager, cdp, owner); } function lockGemAndDraw( address manager, address jug, address gemJoin, address daiJoin, uint256 cdp, uint256 wadC, uint256 wadD, bool transferFrom ) public { address urn = ManagerLike(manager).urns(cdp); address vat = ManagerLike(manager).vat(); bytes32 ilk = ManagerLike(manager).ilks(cdp); // Takes token amount from user's wallet and joins into the vat gemJoin_join(gemJoin, urn, wadC, transferFrom); // Locks token amount into the CDP and generates debt frob( manager, cdp, toInt(convertTo18(gemJoin, wadC)), _getDrawDart(vat, jug, urn, ilk, wadD) ); // Moves the DAI amount (balance in the vat in rad) to proxy's address move(manager, cdp, address(this), toRad(wadD)); // Allows adapter to access to proxy's DAI balance in the vat if (VatLike(vat).can(address(this), address(daiJoin)) == 0) { VatLike(vat).hope(daiJoin); } // Exits DAI to the user's wallet as a token DaiJoinLike(daiJoin).exit(msg.sender, wadD); } function openLockGemAndDraw( address manager, address jug, address gemJoin, address daiJoin, bytes32 ilk, uint256 wadC, uint256 wadD, bool transferFrom, address owner ) public returns (uint256 cdp) { cdp = open(manager, ilk, address(this)); lockGemAndDraw(manager, jug, gemJoin, daiJoin, cdp, wadC, wadD, transferFrom); give(manager, cdp, owner); } } contract MCDCreateTaker { address payable public constant MCD_CREATE_FLASH_LOAN = 0xb09bCc172050fBd4562da8b229Cf3E45Dc3045A6; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; address public constant ETH_JOIN_ADDRESS = 0x2F0b23f53734252Bda2277357e97e1517d6B042A; ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); // solhint-disable-next-line const-name-snakecase Manager public constant manager = Manager(0x5ef30b9986345249bc32d8928B7ee64DE9435E39); // solhint-disable-next-line const-name-snakecase DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); struct CreateData { uint collAmount; uint daiAmount; address joinAddr; } function openWithLoan( SaverExchangeCore.ExchangeData memory _exchangeData, CreateData memory _createData ) public payable { MCD_CREATE_FLASH_LOAN.transfer(msg.value); //0x fee if (_createData.joinAddr != ETH_JOIN_ADDRESS) { ERC20(getCollateralAddr(_createData.joinAddr)).transferFrom(msg.sender, address(this), _createData.collAmount); ERC20(getCollateralAddr(_createData.joinAddr)).transfer(MCD_CREATE_FLASH_LOAN, _createData.collAmount); } (uint[6] memory numData, address[5] memory addrData, bytes memory callData) = _packData(_createData, _exchangeData); bytes memory paramsData = abi.encode(numData, addrData, callData, address(this)); lendingPool.flashLoan(MCD_CREATE_FLASH_LOAN, DAI_ADDRESS, _createData.daiAmount, paramsData); logger.Log(address(this), msg.sender, "MCDCreate", abi.encode(manager.last(address(this)), _createData.collAmount, _createData.daiAmount)); } function getCollateralAddr(address _joinAddr) internal view returns (address) { return address(Join(_joinAddr).gem()); } function _packData( CreateData memory _createData, SaverExchangeCore.ExchangeData memory exchangeData ) internal pure returns (uint[6] memory numData, address[5] memory addrData, bytes memory callData) { numData = [ _createData.collAmount, _createData.daiAmount, exchangeData.srcAmount, exchangeData.destAmount, exchangeData.minPrice, exchangeData.price0x ]; addrData = [ exchangeData.srcAddr, exchangeData.destAddr, exchangeData.exchangeAddr, exchangeData.wrapper, _createData.joinAddr ]; callData = exchangeData.callData; } } abstract contract GemLike { function approve(address, uint) virtual public; function transfer(address, uint) virtual public; function transferFrom(address, address, uint) virtual public; function deposit() virtual public payable; function withdraw(uint) virtual public; } abstract contract ManagerLike { function cdpCan(address, uint, address) virtual public view returns (uint); function ilks(uint) virtual public view returns (bytes32); function owns(uint) virtual public view returns (address); function urns(uint) virtual public view returns (address); function vat() virtual public view returns (address); function open(bytes32, address) virtual public returns (uint); function give(uint, address) virtual public; function cdpAllow(uint, address, uint) virtual public; function urnAllow(address, uint) virtual public; function frob(uint, int, int) virtual public; function flux(uint, address, uint) virtual public; function move(uint, address, uint) virtual public; function exit(address, uint, address, uint) virtual public; function quit(uint, address) virtual public; function enter(address, uint) virtual public; function shift(uint, uint) virtual public; } abstract contract VatLike { function can(address, address) virtual public view returns (uint); function ilks(bytes32) virtual public view returns (uint, uint, uint, uint, uint); function dai(address) virtual public view returns (uint); function urns(bytes32, address) virtual public view returns (uint, uint); function frob(bytes32, address, address, address, int, int) virtual public; function hope(address) virtual public; function move(address, address, uint) virtual public; } abstract contract GemJoinLike { function dec() virtual public returns (uint); function gem() virtual public returns (GemLike); function join(address, uint) virtual public payable; function exit(address, uint) virtual public; } abstract contract GNTJoinLike { function bags(address) virtual public view returns (address); function make(address) virtual public returns (address); } abstract contract DaiJoinLike { function vat() virtual public returns (VatLike); function dai() virtual public returns (GemLike); function join(address, uint) virtual public payable; function exit(address, uint) virtual public; } abstract contract HopeLike { function hope(address) virtual public; function nope(address) virtual public; } abstract contract ProxyRegistryInterface { function proxies(address _owner) virtual public view returns (address); function build(address) virtual public returns (address); } abstract contract EndLike { function fix(bytes32) virtual public view returns (uint); function cash(bytes32, uint) virtual public; function free(bytes32) virtual public; function pack(uint) virtual public; function skim(bytes32, address) virtual public; } abstract contract JugLike { function drip(bytes32) virtual public returns (uint); } abstract contract PotLike { function pie(address) virtual public view returns (uint); function drip() virtual public returns (uint); function join(uint) virtual public; function exit(uint) virtual public; } abstract contract ProxyRegistryLike { function proxies(address) virtual public view returns (address); function build(address) virtual public returns (address); } abstract contract ProxyLike { function owner() virtual public view returns (address); } abstract contract DSProxy { function execute(address _target, bytes memory _data) virtual public payable returns (bytes32); function setOwner(address owner_) virtual public; } contract Common { uint256 constant RAY = 10 ** 27; // Internal functions function mul(uint x, uint y) internal pure returns (uint z) { require(y == 0 || (z = x * y) / y == x, "mul-overflow"); } // Public functions function daiJoin_join(address apt, address urn, uint wad) public { // Gets DAI from the user's wallet DaiJoinLike(apt).dai().transferFrom(msg.sender, address(this), wad); // Approves adapter to take the DAI amount DaiJoinLike(apt).dai().approve(apt, wad); // Joins DAI into the vat DaiJoinLike(apt).join(urn, wad); } } contract SaverProxyActions is Common { event CDPAction(string indexed, uint indexed, uint, uint); // Internal functions function sub(uint x, uint y) internal pure returns (uint z) { require((z = x - y) <= x, "sub-overflow"); } function toInt(uint x) internal pure returns (int y) { y = int(x); require(y >= 0, "int-overflow"); } function toRad(uint wad) internal pure returns (uint rad) { rad = mul(wad, 10 ** 27); } function convertTo18(address gemJoin, uint256 amt) internal returns (uint256 wad) { // For those collaterals that have less than 18 decimals precision we need to do the conversion before passing to frob function // Adapters will automatically handle the difference of precision wad = mul( amt, 10 ** (18 - GemJoinLike(gemJoin).dec()) ); } function _getDrawDart( address vat, address jug, address urn, bytes32 ilk, uint wad ) internal returns (int dart) { // Updates stability fee rate uint rate = JugLike(jug).drip(ilk); // Gets DAI balance of the urn in the vat uint dai = VatLike(vat).dai(urn); // If there was already enough DAI in the vat balance, just exits it without adding more debt if (dai < mul(wad, RAY)) { // Calculates the needed dart so together with the existing dai in the vat is enough to exit wad amount of DAI tokens dart = toInt(sub(mul(wad, RAY), dai) / rate); // This is neeeded due lack of precision. It might need to sum an extra dart wei (for the given DAI wad amount) dart = mul(uint(dart), rate) < mul(wad, RAY) ? dart + 1 : dart; } } function _getWipeDart( address vat, uint dai, address urn, bytes32 ilk ) internal view returns (int dart) { // Gets actual rate from the vat (, uint rate,,,) = VatLike(vat).ilks(ilk); // Gets actual art value of the urn (, uint art) = VatLike(vat).urns(ilk, urn); // Uses the whole dai balance in the vat to reduce the debt dart = toInt(dai / rate); // Checks the calculated dart is not higher than urn.art (total debt), otherwise uses its value dart = uint(dart) <= art ? - dart : - toInt(art); } function _getWipeAllWad( address vat, address usr, address urn, bytes32 ilk ) internal view returns (uint wad) { // Gets actual rate from the vat (, uint rate,,,) = VatLike(vat).ilks(ilk); // Gets actual art value of the urn (, uint art) = VatLike(vat).urns(ilk, urn); // Gets actual dai amount in the urn uint dai = VatLike(vat).dai(usr); uint rad = sub(mul(art, rate), dai); wad = rad / RAY; // If the rad precision has some dust, it will need to request for 1 extra wad wei wad = mul(wad, RAY) < rad ? wad + 1 : wad; } // Public functions function transfer(address gem, address dst, uint wad) public { GemLike(gem).transfer(dst, wad); } function ethJoin_join(address apt, address urn) public payable { // Wraps ETH in WETH GemJoinLike(apt).gem().deposit{value: msg.value}(); // Approves adapter to take the WETH amount GemJoinLike(apt).gem().approve(address(apt), msg.value); // Joins WETH collateral into the vat GemJoinLike(apt).join(urn, msg.value); } function gemJoin_join(address apt, address urn, uint wad, bool transferFrom) public { // Only executes for tokens that have approval/transferFrom implementation if (transferFrom) { // Gets token from the user's wallet GemJoinLike(apt).gem().transferFrom(msg.sender, address(this), wad); // Approves adapter to take the token amount GemJoinLike(apt).gem().approve(apt, wad); } // Joins token collateral into the vat GemJoinLike(apt).join(urn, wad); } function hope( address obj, address usr ) public { HopeLike(obj).hope(usr); } function nope( address obj, address usr ) public { HopeLike(obj).nope(usr); } function open( address manager, bytes32 ilk, address usr ) public returns (uint cdp) { cdp = ManagerLike(manager).open(ilk, usr); } function give( address manager, uint cdp, address usr ) public { ManagerLike(manager).give(cdp, usr); emit CDPAction('give', cdp, 0, 0); } function giveToProxy( address proxyRegistry, address manager, uint cdp, address dst ) public { // Gets actual proxy address address proxy = ProxyRegistryLike(proxyRegistry).proxies(dst); // Checks if the proxy address already existed and dst address is still the owner if (proxy == address(0) || ProxyLike(proxy).owner() != dst) { uint csize; assembly { csize := extcodesize(dst) } // We want to avoid creating a proxy for a contract address that might not be able to handle proxies, then losing the CDP require(csize == 0, "Dst-is-a-contract"); // Creates the proxy for the dst address proxy = ProxyRegistryLike(proxyRegistry).build(dst); } // Transfers CDP to the dst proxy give(manager, cdp, proxy); } function cdpAllow( address manager, uint cdp, address usr, uint ok ) public { ManagerLike(manager).cdpAllow(cdp, usr, ok); } function urnAllow( address manager, address usr, uint ok ) public { ManagerLike(manager).urnAllow(usr, ok); } function flux( address manager, uint cdp, address dst, uint wad ) public { ManagerLike(manager).flux(cdp, dst, wad); } function move( address manager, uint cdp, address dst, uint rad ) public { ManagerLike(manager).move(cdp, dst, rad); } function frob( address manager, uint cdp, int dink, int dart ) public { ManagerLike(manager).frob(cdp, dink, dart); } function quit( address manager, uint cdp, address dst ) public { ManagerLike(manager).quit(cdp, dst); } function enter( address manager, address src, uint cdp ) public { ManagerLike(manager).enter(src, cdp); } function shift( address manager, uint cdpSrc, uint cdpOrg ) public { ManagerLike(manager).shift(cdpSrc, cdpOrg); } function makeGemBag( address gemJoin ) public returns (address bag) { bag = GNTJoinLike(gemJoin).make(address(this)); } function lockETH( address manager, address ethJoin, uint cdp ) public payable { // Receives ETH amount, converts it to WETH and joins it into the vat ethJoin_join(ethJoin, address(this)); // Locks WETH amount into the CDP VatLike(ManagerLike(manager).vat()).frob( ManagerLike(manager).ilks(cdp), ManagerLike(manager).urns(cdp), address(this), address(this), toInt(msg.value), 0 ); emit CDPAction('lockETH', cdp, msg.value, 0); } function lockGem( address manager, address gemJoin, uint cdp, uint wad, bool transferFrom ) public { // Takes token amount from user's wallet and joins into the vat gemJoin_join(gemJoin, address(this), wad, transferFrom); // Locks token amount into the CDP VatLike(ManagerLike(manager).vat()).frob( ManagerLike(manager).ilks(cdp), ManagerLike(manager).urns(cdp), address(this), address(this), toInt(convertTo18(gemJoin, wad)), 0 ); emit CDPAction('lockGem', cdp, wad, 0); } function freeETH( address manager, address ethJoin, uint cdp, uint wad ) public { // Unlocks WETH amount from the CDP frob(manager, cdp, -toInt(wad), 0); // Moves the amount from the CDP urn to proxy's address flux(manager, cdp, address(this), wad); // Exits WETH amount to proxy address as a token GemJoinLike(ethJoin).exit(address(this), wad); // Converts WETH to ETH GemJoinLike(ethJoin).gem().withdraw(wad); // Sends ETH back to the user's wallet msg.sender.transfer(wad); emit CDPAction('freeETH', cdp, wad, 0); } function freeGem( address manager, address gemJoin, uint cdp, uint wad ) public { uint wad18 = convertTo18(gemJoin, wad); // Unlocks token amount from the CDP frob(manager, cdp, -toInt(wad18), 0); // Moves the amount from the CDP urn to proxy's address flux(manager, cdp, address(this), wad18); // Exits token amount to the user's wallet as a token GemJoinLike(gemJoin).exit(msg.sender, wad); emit CDPAction('freeGem', cdp, wad, 0); } function exitETH( address manager, address ethJoin, uint cdp, uint wad ) public { // Moves the amount from the CDP urn to proxy's address flux(manager, cdp, address(this), wad); // Exits WETH amount to proxy address as a token GemJoinLike(ethJoin).exit(address(this), wad); // Converts WETH to ETH GemJoinLike(ethJoin).gem().withdraw(wad); // Sends ETH back to the user's wallet msg.sender.transfer(wad); } function exitGem( address manager, address gemJoin, uint cdp, uint wad ) public { // Moves the amount from the CDP urn to proxy's address flux(manager, cdp, address(this), convertTo18(gemJoin, wad)); // Exits token amount to the user's wallet as a token GemJoinLike(gemJoin).exit(msg.sender, wad); } function draw( address manager, address jug, address daiJoin, uint cdp, uint wad ) public { address urn = ManagerLike(manager).urns(cdp); address vat = ManagerLike(manager).vat(); bytes32 ilk = ManagerLike(manager).ilks(cdp); // Generates debt in the CDP frob(manager, cdp, 0, _getDrawDart(vat, jug, urn, ilk, wad)); // Moves the DAI amount (balance in the vat in rad) to proxy's address move(manager, cdp, address(this), toRad(wad)); // Allows adapter to access to proxy's DAI balance in the vat if (VatLike(vat).can(address(this), address(daiJoin)) == 0) { VatLike(vat).hope(daiJoin); } // Exits DAI to the user's wallet as a token DaiJoinLike(daiJoin).exit(msg.sender, wad); emit CDPAction('draw', cdp, 0, wad); } function wipe( address manager, address daiJoin, uint cdp, uint wad ) public { address vat = ManagerLike(manager).vat(); address urn = ManagerLike(manager).urns(cdp); bytes32 ilk = ManagerLike(manager).ilks(cdp); address own = ManagerLike(manager).owns(cdp); if (own == address(this) || ManagerLike(manager).cdpCan(own, cdp, address(this)) == 1) { // Joins DAI amount into the vat daiJoin_join(daiJoin, urn, wad); // Paybacks debt to the CDP frob(manager, cdp, 0, _getWipeDart(vat, VatLike(vat).dai(urn), urn, ilk)); } else { // Joins DAI amount into the vat daiJoin_join(daiJoin, address(this), wad); // Paybacks debt to the CDP VatLike(vat).frob( ilk, urn, address(this), address(this), 0, _getWipeDart(vat, wad * RAY, urn, ilk) ); } emit CDPAction('wipe', cdp, 0, wad); } function wipeAll( address manager, address daiJoin, uint cdp ) public { address vat = ManagerLike(manager).vat(); address urn = ManagerLike(manager).urns(cdp); bytes32 ilk = ManagerLike(manager).ilks(cdp); (, uint art) = VatLike(vat).urns(ilk, urn); address own = ManagerLike(manager).owns(cdp); if (own == address(this) || ManagerLike(manager).cdpCan(own, cdp, address(this)) == 1) { // Joins DAI amount into the vat daiJoin_join(daiJoin, urn, _getWipeAllWad(vat, urn, urn, ilk)); // Paybacks debt to the CDP frob(manager, cdp, 0, -int(art)); } else { // Joins DAI amount into the vat daiJoin_join(daiJoin, address(this), _getWipeAllWad(vat, address(this), urn, ilk)); // Paybacks debt to the CDP VatLike(vat).frob( ilk, urn, address(this), address(this), 0, -int(art) ); } emit CDPAction('wipeAll', cdp, 0, art); } function lockETHAndDraw( address manager, address jug, address ethJoin, address daiJoin, uint cdp, uint wadD ) public payable { address urn = ManagerLike(manager).urns(cdp); address vat = ManagerLike(manager).vat(); bytes32 ilk = ManagerLike(manager).ilks(cdp); // Receives ETH amount, converts it to WETH and joins it into the vat ethJoin_join(ethJoin, urn); // Locks WETH amount into the CDP and generates debt frob(manager, cdp, toInt(msg.value), _getDrawDart(vat, jug, urn, ilk, wadD)); // Moves the DAI amount (balance in the vat in rad) to proxy's address move(manager, cdp, address(this), toRad(wadD)); // Allows adapter to access to proxy's DAI balance in the vat if (VatLike(vat).can(address(this), address(daiJoin)) == 0) { VatLike(vat).hope(daiJoin); } // Exits DAI to the user's wallet as a token DaiJoinLike(daiJoin).exit(msg.sender, wadD); } function openLockETHAndDraw( address manager, address jug, address ethJoin, address daiJoin, bytes32 ilk, uint wadD ) public payable returns (uint cdp) { cdp = open(manager, ilk, address(this)); lockETHAndDraw(manager, jug, ethJoin, daiJoin, cdp, wadD); emit CDPAction('openLockETHAndDraw', cdp, msg.value, wadD); } function lockGemAndDraw( address manager, address jug, address gemJoin, address daiJoin, uint cdp, uint wadC, uint wadD, bool transferFrom ) public { address urn = ManagerLike(manager).urns(cdp); address vat = ManagerLike(manager).vat(); bytes32 ilk = ManagerLike(manager).ilks(cdp); // Takes token amount from user's wallet and joins into the vat gemJoin_join(gemJoin, urn, wadC, transferFrom); // Locks token amount into the CDP and generates debt frob(manager, cdp, toInt(convertTo18(gemJoin, wadC)), _getDrawDart(vat, jug, urn, ilk, wadD)); // Moves the DAI amount (balance in the vat in rad) to proxy's address move(manager, cdp, address(this), toRad(wadD)); // Allows adapter to access to proxy's DAI balance in the vat if (VatLike(vat).can(address(this), address(daiJoin)) == 0) { VatLike(vat).hope(daiJoin); } // Exits DAI to the user's wallet as a token DaiJoinLike(daiJoin).exit(msg.sender, wadD); } function openLockGemAndDraw( address manager, address jug, address gemJoin, address daiJoin, bytes32 ilk, uint wadC, uint wadD, bool transferFrom ) public returns (uint cdp) { cdp = open(manager, ilk, address(this)); lockGemAndDraw(manager, jug, gemJoin, daiJoin, cdp, wadC, wadD, transferFrom); emit CDPAction('openLockGemAndDraw', cdp, wadC, wadD); } function wipeAllAndFreeETH( address manager, address ethJoin, address daiJoin, uint cdp, uint wadC ) public { address vat = ManagerLike(manager).vat(); address urn = ManagerLike(manager).urns(cdp); bytes32 ilk = ManagerLike(manager).ilks(cdp); (, uint art) = VatLike(vat).urns(ilk, urn); // Joins DAI amount into the vat daiJoin_join(daiJoin, urn, _getWipeAllWad(vat, urn, urn, ilk)); // Paybacks debt to the CDP and unlocks WETH amount from it frob( manager, cdp, -toInt(wadC), -int(art) ); // Moves the amount from the CDP urn to proxy's address flux(manager, cdp, address(this), wadC); // Exits WETH amount to proxy address as a token GemJoinLike(ethJoin).exit(address(this), wadC); // Converts WETH to ETH GemJoinLike(ethJoin).gem().withdraw(wadC); // Sends ETH back to the user's wallet msg.sender.transfer(wadC); emit CDPAction('wipeAllAndFreeETH', cdp, wadC, art); } function wipeAndFreeGem( address manager, address gemJoin, address daiJoin, uint cdp, uint wadC, uint wadD ) public { address urn = ManagerLike(manager).urns(cdp); // Joins DAI amount into the vat daiJoin_join(daiJoin, urn, wadD); uint wad18 = convertTo18(gemJoin, wadC); // Paybacks debt to the CDP and unlocks token amount from it frob( manager, cdp, -toInt(wad18), _getWipeDart(ManagerLike(manager).vat(), VatLike(ManagerLike(manager).vat()).dai(urn), urn, ManagerLike(manager).ilks(cdp)) ); // Moves the amount from the CDP urn to proxy's address flux(manager, cdp, address(this), wad18); // Exits token amount to the user's wallet as a token GemJoinLike(gemJoin).exit(msg.sender, wadC); } function wipeAllAndFreeGem( address manager, address gemJoin, address daiJoin, uint cdp, uint wadC ) public { address vat = ManagerLike(manager).vat(); address urn = ManagerLike(manager).urns(cdp); bytes32 ilk = ManagerLike(manager).ilks(cdp); (, uint art) = VatLike(vat).urns(ilk, urn); // Joins DAI amount into the vat daiJoin_join(daiJoin, urn, _getWipeAllWad(vat, urn, urn, ilk)); uint wad18 = convertTo18(gemJoin, wadC); // Paybacks debt to the CDP and unlocks token amount from it frob( manager, cdp, -toInt(wad18), -int(art) ); // Moves the amount from the CDP urn to proxy's address flux(manager, cdp, address(this), wad18); // Exits token amount to the user's wallet as a token GemJoinLike(gemJoin).exit(msg.sender, wadC); emit CDPAction('wipeAllAndFreeGem', cdp, wadC, art); } function createProxyAndCDP( address manager, address jug, address ethJoin, address daiJoin, bytes32 ilk, uint wadD, address registry ) public payable returns(uint) { address proxy = ProxyRegistryInterface(registry).build(msg.sender); uint cdp = openLockETHAndDraw(manager, jug, ethJoin, daiJoin, ilk, wadD ); give(manager, cdp, address(proxy)); return cdp; } function createProxyAndGemCDP( address manager, address jug, address gemJoin, address daiJoin, bytes32 ilk, uint wadC, uint wadD, bool transferFrom, address registry ) public returns(uint) { address proxy = ProxyRegistryInterface(registry).build(msg.sender); uint cdp = openLockGemAndDraw(manager, jug, gemJoin, daiJoin, ilk, wadC, wadD, transferFrom); give(manager, cdp, address(proxy)); return cdp; } } contract MCDSaverProxyHelper is DSMath { /// @notice Returns a normalized debt _amount based on the current rate /// @param _amount Amount of dai to be normalized /// @param _rate Current rate of the stability fee /// @param _daiVatBalance Balance od Dai in the Vat for that CDP function normalizeDrawAmount(uint _amount, uint _rate, uint _daiVatBalance) internal pure returns (int dart) { if (_daiVatBalance < mul(_amount, RAY)) { dart = toPositiveInt(sub(mul(_amount, RAY), _daiVatBalance) / _rate); dart = mul(uint(dart), _rate) < mul(_amount, RAY) ? dart + 1 : dart; } } /// @notice Converts a number to Rad percision /// @param _wad The input number in wad percision function toRad(uint _wad) internal pure returns (uint) { return mul(_wad, 10 ** 27); } /// @notice Converts a number to 18 decimal percision /// @param _joinAddr Join address of the collateral /// @param _amount Number to be converted function convertTo18(address _joinAddr, uint256 _amount) internal view returns (uint256) { return mul(_amount, 10 ** (18 - Join(_joinAddr).dec())); } /// @notice Converts a uint to int and checks if positive /// @param _x Number to be converted function toPositiveInt(uint _x) internal pure returns (int y) { y = int(_x); require(y >= 0, "int-overflow"); } /// @notice Gets Dai amount in Vat which can be added to Cdp /// @param _vat Address of Vat contract /// @param _urn Urn of the Cdp /// @param _ilk Ilk of the Cdp function normalizePaybackAmount(address _vat, address _urn, bytes32 _ilk) internal view returns (int amount) { uint dai = Vat(_vat).dai(_urn); (, uint rate,,,) = Vat(_vat).ilks(_ilk); (, uint art) = Vat(_vat).urns(_ilk, _urn); amount = toPositiveInt(dai / rate); amount = uint(amount) <= art ? - amount : - toPositiveInt(art); } /// @notice Gets the whole debt of the CDP /// @param _vat Address of Vat contract /// @param _usr Address of the Dai holder /// @param _urn Urn of the Cdp /// @param _ilk Ilk of the Cdp function getAllDebt(address _vat, address _usr, address _urn, bytes32 _ilk) internal view returns (uint daiAmount) { (, uint rate,,,) = Vat(_vat).ilks(_ilk); (, uint art) = Vat(_vat).urns(_ilk, _urn); uint dai = Vat(_vat).dai(_usr); uint rad = sub(mul(art, rate), dai); daiAmount = rad / RAY; daiAmount = mul(daiAmount, RAY) < rad ? daiAmount + 1 : daiAmount; } /// @notice Gets the token address from the Join contract /// @param _joinAddr Address of the Join contract function getCollateralAddr(address _joinAddr) internal view returns (address) { return address(Join(_joinAddr).gem()); } /// @notice Gets CDP info (collateral, debt) /// @param _manager Manager contract /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP function getCdpInfo(Manager _manager, uint _cdpId, bytes32 _ilk) public view returns (uint, uint) { address vat = _manager.vat(); address urn = _manager.urns(_cdpId); (uint collateral, uint debt) = Vat(vat).urns(_ilk, urn); (,uint rate,,,) = Vat(vat).ilks(_ilk); return (collateral, rmul(debt, rate)); } /// @notice Address that owns the DSProxy that owns the CDP /// @param _manager Manager contract /// @param _cdpId Id of the CDP function getOwner(Manager _manager, uint _cdpId) public view returns (address) { DSProxy proxy = DSProxy(uint160(_manager.owns(_cdpId))); return proxy.owner(); } } abstract contract ILendingPool { function flashLoan( address payable _receiver, address _reserve, uint _amount, bytes calldata _params) external virtual; } abstract contract ProtocolInterface { function deposit(address _user, uint256 _amount) public virtual; function withdraw(address _user, uint256 _amount) public virtual; } contract SavingsLogger { event Deposit(address indexed sender, uint8 protocol, uint256 amount); event Withdraw(address indexed sender, uint8 protocol, uint256 amount); event Swap(address indexed sender, uint8 fromProtocol, uint8 toProtocol, uint256 amount); function logDeposit(address _sender, uint8 _protocol, uint256 _amount) external { emit Deposit(_sender, _protocol, _amount); } function logWithdraw(address _sender, uint8 _protocol, uint256 _amount) external { emit Withdraw(_sender, _protocol, _amount); } function logSwap(address _sender, uint8 _protocolFrom, uint8 _protocolTo, uint256 _amount) external { emit Swap(_sender, _protocolFrom, _protocolTo, _amount); } } contract AaveSavingsProtocol is ProtocolInterface, DSAuth { address public constant ADAI_ADDRESS = 0xfC1E690f61EFd961294b3e1Ce3313fBD8aa4f85d; address public constant AAVE_LENDING_POOL = 0x398eC7346DcD622eDc5ae82352F02bE94C62d119; address public constant AAVE_LENDING_POOL_CORE = 0x3dfd23A6c5E8BbcFc9581d2E864a68feb6a076d3; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; function deposit(address _user, uint _amount) public override { require(msg.sender == _user); // get dai from user require(ERC20(DAI_ADDRESS).transferFrom(_user, address(this), _amount)); ERC20(DAI_ADDRESS).approve(AAVE_LENDING_POOL_CORE, uint(-1)); ILendingPool(AAVE_LENDING_POOL).deposit(DAI_ADDRESS, _amount, 0); ERC20(ADAI_ADDRESS).transfer(_user, ERC20(ADAI_ADDRESS).balanceOf(address(this))); } function withdraw(address _user, uint _amount) public override { require(msg.sender == _user); require(ERC20(ADAI_ADDRESS).transferFrom(_user, address(this), _amount)); IAToken(ADAI_ADDRESS).redeem(_amount); // return dai we have to user ERC20(DAI_ADDRESS).transfer(_user, _amount); } } contract CompoundSavingsProtocol { address public constant NEW_CDAI_ADDRESS = 0x5d3a536E4D6DbD6114cc1Ead35777bAB948E3643; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; CTokenInterface public constant cDaiContract = CTokenInterface(NEW_CDAI_ADDRESS); function compDeposit(address _user, uint _amount) internal { // get dai from user require(ERC20(DAI_ADDRESS).transferFrom(_user, address(this), _amount)); // mainnet only ERC20(DAI_ADDRESS).approve(NEW_CDAI_ADDRESS, uint(-1)); // mint cDai require(cDaiContract.mint(_amount) == 0, "Failed Mint"); } function compWithdraw(address _user, uint _amount) internal { // transfer all users balance to this contract require(cDaiContract.transferFrom(_user, address(this), ERC20(NEW_CDAI_ADDRESS).balanceOf(_user))); // approve cDai to compound contract cDaiContract.approve(NEW_CDAI_ADDRESS, uint(-1)); // get dai from cDai contract require(cDaiContract.redeemUnderlying(_amount) == 0, "Reedem Failed"); // return to user balance we didn't spend uint cDaiBalance = cDaiContract.balanceOf(address(this)); if (cDaiBalance > 0) { cDaiContract.transfer(_user, cDaiBalance); } // return dai we have to user ERC20(DAI_ADDRESS).transfer(_user, _amount); } } abstract contract VatLike { function can(address, address) virtual public view returns (uint); function ilks(bytes32) virtual public view returns (uint, uint, uint, uint, uint); function dai(address) virtual public view returns (uint); function urns(bytes32, address) virtual public view returns (uint, uint); function frob(bytes32, address, address, address, int, int) virtual public; function hope(address) virtual public; function move(address, address, uint) virtual public; } abstract contract PotLike { function pie(address) virtual public view returns (uint); function drip() virtual public returns (uint); function join(uint) virtual public; function exit(uint) virtual public; } abstract contract GemLike { function approve(address, uint) virtual public; function transfer(address, uint) virtual public; function transferFrom(address, address, uint) virtual public; function deposit() virtual public payable; function withdraw(uint) virtual public; } abstract contract DaiJoinLike { function vat() virtual public returns (VatLike); function dai() virtual public returns (GemLike); function join(address, uint) virtual public payable; function exit(address, uint) virtual public; } contract DSRSavingsProtocol is DSMath { // Mainnet address public constant POT_ADDRESS = 0x197E90f9FAD81970bA7976f33CbD77088E5D7cf7; address public constant DAI_JOIN_ADDRESS = 0x9759A6Ac90977b93B58547b4A71c78317f391A28; function dsrDeposit(uint _amount, bool _fromUser) internal { VatLike vat = DaiJoinLike(DAI_JOIN_ADDRESS).vat(); uint chi = PotLike(POT_ADDRESS).drip(); daiJoin_join(DAI_JOIN_ADDRESS, address(this), _amount, _fromUser); if (vat.can(address(this), address(POT_ADDRESS)) == 0) { vat.hope(POT_ADDRESS); } PotLike(POT_ADDRESS).join(mul(_amount, RAY) / chi); } function dsrWithdraw(uint _amount, bool _toUser) internal { VatLike vat = DaiJoinLike(DAI_JOIN_ADDRESS).vat(); uint chi = PotLike(POT_ADDRESS).drip(); uint pie = mul(_amount, RAY) / chi; PotLike(POT_ADDRESS).exit(pie); uint balance = DaiJoinLike(DAI_JOIN_ADDRESS).vat().dai(address(this)); if (vat.can(address(this), address(DAI_JOIN_ADDRESS)) == 0) { vat.hope(DAI_JOIN_ADDRESS); } address to; if (_toUser) { to = msg.sender; } else { to = address(this); } if (_amount == uint(-1)) { DaiJoinLike(DAI_JOIN_ADDRESS).exit(to, mul(chi, pie) / RAY); } else { DaiJoinLike(DAI_JOIN_ADDRESS).exit( to, balance >= mul(_amount, RAY) ? _amount : balance / RAY ); } } function daiJoin_join(address apt, address urn, uint wad, bool _fromUser) internal { if (_fromUser) { DaiJoinLike(apt).dai().transferFrom(msg.sender, address(this), wad); } DaiJoinLike(apt).dai().approve(apt, wad); DaiJoinLike(apt).join(urn, wad); } } contract DydxSavingsProtocol is ProtocolInterface, DSAuth { address public constant SOLO_MARGIN_ADDRESS = 0x1E0447b19BB6EcFdAe1e4AE1694b0C3659614e4e; ISoloMargin public soloMargin; address public savingsProxy; uint daiMarketId = 3; constructor() public { soloMargin = ISoloMargin(SOLO_MARGIN_ADDRESS); } function addSavingsProxy(address _savingsProxy) public auth { savingsProxy = _savingsProxy; } function deposit(address _user, uint _amount) public override { require(msg.sender == _user); Account.Info[] memory accounts = new Account.Info[](1); accounts[0] = getAccount(_user, 0); Actions.ActionArgs[] memory actions = new Actions.ActionArgs[](1); Types.AssetAmount memory amount = Types.AssetAmount({ sign: true, denomination: Types.AssetDenomination.Wei, ref: Types.AssetReference.Delta, value: _amount }); actions[0] = Actions.ActionArgs({ actionType: Actions.ActionType.Deposit, accountId: 0, amount: amount, primaryMarketId: daiMarketId, otherAddress: _user, secondaryMarketId: 0, //not used otherAccountId: 0, //not used data: "" //not used }); soloMargin.operate(accounts, actions); } function withdraw(address _user, uint _amount) public override { require(msg.sender == _user); Account.Info[] memory accounts = new Account.Info[](1); accounts[0] = getAccount(_user, 0); Actions.ActionArgs[] memory actions = new Actions.ActionArgs[](1); Types.AssetAmount memory amount = Types.AssetAmount({ sign: false, denomination: Types.AssetDenomination.Wei, ref: Types.AssetReference.Delta, value: _amount }); actions[0] = Actions.ActionArgs({ actionType: Actions.ActionType.Withdraw, accountId: 0, amount: amount, primaryMarketId: daiMarketId, otherAddress: _user, secondaryMarketId: 0, //not used otherAccountId: 0, //not used data: "" //not used }); soloMargin.operate(accounts, actions); } function getWeiBalance(address _user, uint _index) public view returns(Types.Wei memory) { Types.Wei[] memory weiBalances; (,,weiBalances) = soloMargin.getAccountBalances(getAccount(_user, _index)); return weiBalances[daiMarketId]; } function getParBalance(address _user, uint _index) public view returns(Types.Par memory) { Types.Par[] memory parBalances; (,parBalances,) = soloMargin.getAccountBalances(getAccount(_user, _index)); return parBalances[daiMarketId]; } function getAccount(address _user, uint _index) public pure returns(Account.Info memory) { Account.Info memory account = Account.Info({ owner: _user, number: _index }); return account; } } abstract contract ISoloMargin { struct OperatorArg { address operator; bool trusted; } function operate( Account.Info[] memory accounts, Actions.ActionArgs[] memory actions ) public virtual; function getAccountBalances( Account.Info memory account ) public view virtual returns ( address[] memory, Types.Par[] memory, Types.Wei[] memory ); function setOperators( OperatorArg[] memory args ) public virtual; function getNumMarkets() public view virtual returns (uint256); function getMarketTokenAddress(uint256 marketId) public view virtual returns (address); } library Account { // ============ Enums ============ /* * Most-recently-cached account status. * * Normal: Can only be liquidated if the account values are violating the global margin-ratio. * Liquid: Can be liquidated no matter the account values. * Can be vaporized if there are no more positive account values. * Vapor: Has only negative (or zeroed) account values. Can be vaporized. * */ enum Status { Normal, Liquid, Vapor } // ============ Structs ============ // Represents the unique key that specifies an account struct Info { address owner; // The address that owns the account uint256 number; // A nonce that allows a single address to control many accounts } // The complete storage for any account struct Storage { mapping (uint256 => Types.Par) balances; // Mapping from marketId to principal Status status; } // ============ Library Functions ============ function equals( Info memory a, Info memory b ) internal pure returns (bool) { return a.owner == b.owner && a.number == b.number; } } library Actions { // ============ Constants ============ bytes32 constant FILE = "Actions"; // ============ Enums ============ enum ActionType { Deposit, // supply tokens Withdraw, // borrow tokens Transfer, // transfer balance between accounts Buy, // buy an amount of some token (externally) Sell, // sell an amount of some token (externally) Trade, // trade tokens against another account Liquidate, // liquidate an undercollateralized or expiring account Vaporize, // use excess tokens to zero-out a completely negative account Call // send arbitrary data to an address } enum AccountLayout { OnePrimary, TwoPrimary, PrimaryAndSecondary } enum MarketLayout { ZeroMarkets, OneMarket, TwoMarkets } // ============ Structs ============ /* * Arguments that are passed to Solo in an ordered list as part of a single operation. * Each ActionArgs has an actionType which specifies which action struct that this data will be * parsed into before being processed. */ struct ActionArgs { ActionType actionType; uint256 accountId; Types.AssetAmount amount; uint256 primaryMarketId; uint256 secondaryMarketId; address otherAddress; uint256 otherAccountId; bytes data; } // ============ Action Types ============ /* * Moves tokens from an address to Solo. Can either repay a borrow or provide additional supply. */ struct DepositArgs { Types.AssetAmount amount; Account.Info account; uint256 market; address from; } /* * Moves tokens from Solo to another address. Can either borrow tokens or reduce the amount * previously supplied. */ struct WithdrawArgs { Types.AssetAmount amount; Account.Info account; uint256 market; address to; } /* * Transfers balance between two accounts. The msg.sender must be an operator for both accounts. * The amount field applies to accountOne. * This action does not require any token movement since the trade is done internally to Solo. */ struct TransferArgs { Types.AssetAmount amount; Account.Info accountOne; Account.Info accountTwo; uint256 market; } /* * Acquires a certain amount of tokens by spending other tokens. Sends takerMarket tokens to the * specified exchangeWrapper contract and expects makerMarket tokens in return. The amount field * applies to the makerMarket. */ struct BuyArgs { Types.AssetAmount amount; Account.Info account; uint256 makerMarket; uint256 takerMarket; address exchangeWrapper; bytes orderData; } /* * Spends a certain amount of tokens to acquire other tokens. Sends takerMarket tokens to the * specified exchangeWrapper and expects makerMarket tokens in return. The amount field applies * to the takerMarket. */ struct SellArgs { Types.AssetAmount amount; Account.Info account; uint256 takerMarket; uint256 makerMarket; address exchangeWrapper; bytes orderData; } /* * Trades balances between two accounts using any external contract that implements the * AutoTrader interface. The AutoTrader contract must be an operator for the makerAccount (for * which it is trading on-behalf-of). The amount field applies to the makerAccount and the * inputMarket. This proposed change to the makerAccount is passed to the AutoTrader which will * quote a change for the makerAccount in the outputMarket (or will disallow the trade). * This action does not require any token movement since the trade is done internally to Solo. */ struct TradeArgs { Types.AssetAmount amount; Account.Info takerAccount; Account.Info makerAccount; uint256 inputMarket; uint256 outputMarket; address autoTrader; bytes tradeData; } /* * Each account must maintain a certain margin-ratio (specified globally). If the account falls * below this margin-ratio, it can be liquidated by any other account. This allows anyone else * (arbitrageurs) to repay any borrowed asset (owedMarket) of the liquidating account in * exchange for any collateral asset (heldMarket) of the liquidAccount. The ratio is determined * by the price ratio (given by the oracles) plus a spread (specified globally). Liquidating an * account also sets a flag on the account that the account is being liquidated. This allows * anyone to continue liquidating the account until there are no more borrows being taken by the * liquidating account. Liquidators do not have to liquidate the entire account all at once but * can liquidate as much as they choose. The liquidating flag allows liquidators to continue * liquidating the account even if it becomes collateralized through partial liquidation or * price movement. */ struct LiquidateArgs { Types.AssetAmount amount; Account.Info solidAccount; Account.Info liquidAccount; uint256 owedMarket; uint256 heldMarket; } /* * Similar to liquidate, but vaporAccounts are accounts that have only negative balances * remaining. The arbitrageur pays back the negative asset (owedMarket) of the vaporAccount in * exchange for a collateral asset (heldMarket) at a favorable spread. However, since the * liquidAccount has no collateral assets, the collateral must come from Solo's excess tokens. */ struct VaporizeArgs { Types.AssetAmount amount; Account.Info solidAccount; Account.Info vaporAccount; uint256 owedMarket; uint256 heldMarket; } /* * Passes arbitrary bytes of data to an external contract that implements the Callee interface. * Does not change any asset amounts. This function may be useful for setting certain variables * on layer-two contracts for certain accounts without having to make a separate Ethereum * transaction for doing so. Also, the second-layer contracts can ensure that the call is coming * from an operator of the particular account. */ struct CallArgs { Account.Info account; address callee; bytes data; } // ============ Helper Functions ============ function getMarketLayout( ActionType actionType ) internal pure returns (MarketLayout) { if ( actionType == Actions.ActionType.Deposit || actionType == Actions.ActionType.Withdraw || actionType == Actions.ActionType.Transfer ) { return MarketLayout.OneMarket; } else if (actionType == Actions.ActionType.Call) { return MarketLayout.ZeroMarkets; } return MarketLayout.TwoMarkets; } function getAccountLayout( ActionType actionType ) internal pure returns (AccountLayout) { if ( actionType == Actions.ActionType.Transfer || actionType == Actions.ActionType.Trade ) { return AccountLayout.TwoPrimary; } else if ( actionType == Actions.ActionType.Liquidate || actionType == Actions.ActionType.Vaporize ) { return AccountLayout.PrimaryAndSecondary; } return AccountLayout.OnePrimary; } // ============ Parsing Functions ============ function parseDepositArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (DepositArgs memory) { assert(args.actionType == ActionType.Deposit); return DepositArgs({ amount: args.amount, account: accounts[args.accountId], market: args.primaryMarketId, from: args.otherAddress }); } function parseWithdrawArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (WithdrawArgs memory) { assert(args.actionType == ActionType.Withdraw); return WithdrawArgs({ amount: args.amount, account: accounts[args.accountId], market: args.primaryMarketId, to: args.otherAddress }); } function parseTransferArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (TransferArgs memory) { assert(args.actionType == ActionType.Transfer); return TransferArgs({ amount: args.amount, accountOne: accounts[args.accountId], accountTwo: accounts[args.otherAccountId], market: args.primaryMarketId }); } function parseBuyArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (BuyArgs memory) { assert(args.actionType == ActionType.Buy); return BuyArgs({ amount: args.amount, account: accounts[args.accountId], makerMarket: args.primaryMarketId, takerMarket: args.secondaryMarketId, exchangeWrapper: args.otherAddress, orderData: args.data }); } function parseSellArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (SellArgs memory) { assert(args.actionType == ActionType.Sell); return SellArgs({ amount: args.amount, account: accounts[args.accountId], takerMarket: args.primaryMarketId, makerMarket: args.secondaryMarketId, exchangeWrapper: args.otherAddress, orderData: args.data }); } function parseTradeArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (TradeArgs memory) { assert(args.actionType == ActionType.Trade); return TradeArgs({ amount: args.amount, takerAccount: accounts[args.accountId], makerAccount: accounts[args.otherAccountId], inputMarket: args.primaryMarketId, outputMarket: args.secondaryMarketId, autoTrader: args.otherAddress, tradeData: args.data }); } function parseLiquidateArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (LiquidateArgs memory) { assert(args.actionType == ActionType.Liquidate); return LiquidateArgs({ amount: args.amount, solidAccount: accounts[args.accountId], liquidAccount: accounts[args.otherAccountId], owedMarket: args.primaryMarketId, heldMarket: args.secondaryMarketId }); } function parseVaporizeArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (VaporizeArgs memory) { assert(args.actionType == ActionType.Vaporize); return VaporizeArgs({ amount: args.amount, solidAccount: accounts[args.accountId], vaporAccount: accounts[args.otherAccountId], owedMarket: args.primaryMarketId, heldMarket: args.secondaryMarketId }); } function parseCallArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (CallArgs memory) { assert(args.actionType == ActionType.Call); return CallArgs({ account: accounts[args.accountId], callee: args.otherAddress, data: args.data }); } } library Math { using SafeMath for uint256; // ============ Constants ============ bytes32 constant FILE = "Math"; // ============ Library Functions ============ /* * Return target * (numerator / denominator). */ function getPartial( uint256 target, uint256 numerator, uint256 denominator ) internal pure returns (uint256) { return target.mul(numerator).div(denominator); } /* * Return target * (numerator / denominator), but rounded up. */ function getPartialRoundUp( uint256 target, uint256 numerator, uint256 denominator ) internal pure returns (uint256) { if (target == 0 || numerator == 0) { // SafeMath will check for zero denominator return SafeMath.div(0, denominator); } return target.mul(numerator).sub(1).div(denominator).add(1); } function to128( uint256 number ) internal pure returns (uint128) { uint128 result = uint128(number); Require.that( result == number, FILE, "Unsafe cast to uint128" ); return result; } function to96( uint256 number ) internal pure returns (uint96) { uint96 result = uint96(number); Require.that( result == number, FILE, "Unsafe cast to uint96" ); return result; } function to32( uint256 number ) internal pure returns (uint32) { uint32 result = uint32(number); Require.that( result == number, FILE, "Unsafe cast to uint32" ); return result; } function min( uint256 a, uint256 b ) internal pure returns (uint256) { return a < b ? a : b; } function max( uint256 a, uint256 b ) internal pure returns (uint256) { return a > b ? a : b; } } library Require { // ============ Constants ============ uint256 constant ASCII_ZERO = 48; // '0' uint256 constant ASCII_RELATIVE_ZERO = 87; // 'a' - 10 uint256 constant ASCII_LOWER_EX = 120; // 'x' bytes2 constant COLON = 0x3a20; // ': ' bytes2 constant COMMA = 0x2c20; // ', ' bytes2 constant LPAREN = 0x203c; // ' <' byte constant RPAREN = 0x3e; // '>' uint256 constant FOUR_BIT_MASK = 0xf; // ============ Library Functions ============ function that( bool must, bytes32 file, bytes32 reason ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason) ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, uint256 payloadA ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), RPAREN ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, uint256 payloadA, uint256 payloadB ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), COMMA, stringify(payloadB), RPAREN ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, address payloadA ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), RPAREN ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, address payloadA, uint256 payloadB ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), COMMA, stringify(payloadB), RPAREN ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, address payloadA, uint256 payloadB, uint256 payloadC ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), COMMA, stringify(payloadB), COMMA, stringify(payloadC), RPAREN ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, bytes32 payloadA ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), RPAREN ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, bytes32 payloadA, uint256 payloadB, uint256 payloadC ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), COMMA, stringify(payloadB), COMMA, stringify(payloadC), RPAREN ) ) ); } } // ============ Private Functions ============ function stringifyTruncated( bytes32 input ) private pure returns (bytes memory) { // put the input bytes into the result bytes memory result = abi.encodePacked(input); // determine the length of the input by finding the location of the last non-zero byte for (uint256 i = 32; i > 0; ) { // reverse-for-loops with unsigned integer /* solium-disable-next-line security/no-modify-for-iter-var */ i--; // find the last non-zero byte in order to determine the length if (result[i] != 0) { uint256 length = i + 1; /* solium-disable-next-line security/no-inline-assembly */ assembly { mstore(result, length) // r.length = length; } return result; } } // all bytes are zero return new bytes(0); } function stringify( uint256 input ) private pure returns (bytes memory) { if (input == 0) { return "0"; } // get the final string length uint256 j = input; uint256 length; while (j != 0) { length++; j /= 10; } // allocate the string bytes memory bstr = new bytes(length); // populate the string starting with the least-significant character j = input; for (uint256 i = length; i > 0; ) { // reverse-for-loops with unsigned integer /* solium-disable-next-line security/no-modify-for-iter-var */ i--; // take last decimal digit bstr[i] = byte(uint8(ASCII_ZERO + (j % 10))); // remove the last decimal digit j /= 10; } return bstr; } function stringify( address input ) private pure returns (bytes memory) { uint256 z = uint256(input); // addresses are "0x" followed by 20 bytes of data which take up 2 characters each bytes memory result = new bytes(42); // populate the result with "0x" result[0] = byte(uint8(ASCII_ZERO)); result[1] = byte(uint8(ASCII_LOWER_EX)); // for each byte (starting from the lowest byte), populate the result with two characters for (uint256 i = 0; i < 20; i++) { // each byte takes two characters uint256 shift = i * 2; // populate the least-significant character result[41 - shift] = char(z & FOUR_BIT_MASK); z = z >> 4; // populate the most-significant character result[40 - shift] = char(z & FOUR_BIT_MASK); z = z >> 4; } return result; } function stringify( bytes32 input ) private pure returns (bytes memory) { uint256 z = uint256(input); // bytes32 are "0x" followed by 32 bytes of data which take up 2 characters each bytes memory result = new bytes(66); // populate the result with "0x" result[0] = byte(uint8(ASCII_ZERO)); result[1] = byte(uint8(ASCII_LOWER_EX)); // for each byte (starting from the lowest byte), populate the result with two characters for (uint256 i = 0; i < 32; i++) { // each byte takes two characters uint256 shift = i * 2; // populate the least-significant character result[65 - shift] = char(z & FOUR_BIT_MASK); z = z >> 4; // populate the most-significant character result[64 - shift] = char(z & FOUR_BIT_MASK); z = z >> 4; } return result; } function char( uint256 input ) private pure returns (byte) { // return ASCII digit (0-9) if (input < 10) { return byte(uint8(input + ASCII_ZERO)); } // return ASCII letter (a-f) return byte(uint8(input + ASCII_RELATIVE_ZERO)); } } library Types { using Math for uint256; // ============ AssetAmount ============ enum AssetDenomination { Wei, // the amount is denominated in wei Par // the amount is denominated in par } enum AssetReference { Delta, // the amount is given as a delta from the current value Target // the amount is given as an exact number to end up at } struct AssetAmount { bool sign; // true if positive AssetDenomination denomination; AssetReference ref; uint256 value; } // ============ Par (Principal Amount) ============ // Total borrow and supply values for a market struct TotalPar { uint128 borrow; uint128 supply; } // Individual principal amount for an account struct Par { bool sign; // true if positive uint128 value; } function zeroPar() internal pure returns (Par memory) { return Par({ sign: false, value: 0 }); } function sub( Par memory a, Par memory b ) internal pure returns (Par memory) { return add(a, negative(b)); } function add( Par memory a, Par memory b ) internal pure returns (Par memory) { Par memory result; if (a.sign == b.sign) { result.sign = a.sign; result.value = SafeMath.add(a.value, b.value).to128(); } else { if (a.value >= b.value) { result.sign = a.sign; result.value = SafeMath.sub(a.value, b.value).to128(); } else { result.sign = b.sign; result.value = SafeMath.sub(b.value, a.value).to128(); } } return result; } function equals( Par memory a, Par memory b ) internal pure returns (bool) { if (a.value == b.value) { if (a.value == 0) { return true; } return a.sign == b.sign; } return false; } function negative( Par memory a ) internal pure returns (Par memory) { return Par({ sign: !a.sign, value: a.value }); } function isNegative( Par memory a ) internal pure returns (bool) { return !a.sign && a.value > 0; } function isPositive( Par memory a ) internal pure returns (bool) { return a.sign && a.value > 0; } function isZero( Par memory a ) internal pure returns (bool) { return a.value == 0; } // ============ Wei (Token Amount) ============ // Individual token amount for an account struct Wei { bool sign; // true if positive uint256 value; } function zeroWei() internal pure returns (Wei memory) { return Wei({ sign: false, value: 0 }); } function sub( Wei memory a, Wei memory b ) internal pure returns (Wei memory) { return add(a, negative(b)); } function add( Wei memory a, Wei memory b ) internal pure returns (Wei memory) { Wei memory result; if (a.sign == b.sign) { result.sign = a.sign; result.value = SafeMath.add(a.value, b.value); } else { if (a.value >= b.value) { result.sign = a.sign; result.value = SafeMath.sub(a.value, b.value); } else { result.sign = b.sign; result.value = SafeMath.sub(b.value, a.value); } } return result; } function equals( Wei memory a, Wei memory b ) internal pure returns (bool) { if (a.value == b.value) { if (a.value == 0) { return true; } return a.sign == b.sign; } return false; } function negative( Wei memory a ) internal pure returns (Wei memory) { return Wei({ sign: !a.sign, value: a.value }); } function isNegative( Wei memory a ) internal pure returns (bool) { return !a.sign && a.value > 0; } function isPositive( Wei memory a ) internal pure returns (bool) { return a.sign && a.value > 0; } function isZero( Wei memory a ) internal pure returns (bool) { return a.value == 0; } } contract FulcrumSavingsProtocol is ProtocolInterface, DSAuth { address public constant NEW_IDAI_ADDRESS = 0x493C57C4763932315A328269E1ADaD09653B9081; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; address public savingsProxy; uint public decimals = 10 ** 18; function addSavingsProxy(address _savingsProxy) public auth { savingsProxy = _savingsProxy; } function deposit(address _user, uint _amount) public override { require(msg.sender == _user); // get dai from user require(ERC20(DAI_ADDRESS).transferFrom(_user, address(this), _amount)); // approve dai to Fulcrum ERC20(DAI_ADDRESS).approve(NEW_IDAI_ADDRESS, uint(-1)); // mint iDai ITokenInterface(NEW_IDAI_ADDRESS).mint(_user, _amount); } function withdraw(address _user, uint _amount) public override { require(msg.sender == _user); // transfer all users tokens to our contract require(ERC20(NEW_IDAI_ADDRESS).transferFrom(_user, address(this), ITokenInterface(NEW_IDAI_ADDRESS).balanceOf(_user))); // approve iDai to that contract ERC20(NEW_IDAI_ADDRESS).approve(NEW_IDAI_ADDRESS, uint(-1)); uint tokenPrice = ITokenInterface(NEW_IDAI_ADDRESS).tokenPrice(); // get dai from iDai contract ITokenInterface(NEW_IDAI_ADDRESS).burn(_user, _amount * decimals / tokenPrice); // return all remaining tokens back to user require(ERC20(NEW_IDAI_ADDRESS).transfer(_user, ITokenInterface(NEW_IDAI_ADDRESS).balanceOf(address(this)))); } } contract LoanShifterTaker is AdminAuth, ProxyPermission { ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; address public constant MANAGER_ADDRESS = 0x5ef30b9986345249bc32d8928B7ee64DE9435E39; Manager public constant manager = Manager(MANAGER_ADDRESS); ShifterRegistry public constant shifterRegistry = ShifterRegistry(0x988B6CFBf3332FF98FFBdED665b1F53a61f92612); enum Protocols { MCD, COMPOUND } enum SwapType { NO_SWAP, COLL_SWAP, DEBT_SWAP } struct LoanShiftData { Protocols fromProtocol; Protocols toProtocol; SwapType swapType; bool wholeDebt; uint collAmount; uint debtAmount; address debtAddr1; address debtAddr2; address addrLoan1; address addrLoan2; uint id1; uint id2; } /// @notice Main entry point, it will move or transform a loan /// @dev Called through DSProxy function moveLoan( LoanShiftData memory _loanShift, SaverExchangeCore.ExchangeData memory _exchangeData ) public { if (_isSameTypeVaults(_loanShift)) { _forkVault(_loanShift); return; } _callCloseAndOpen(_loanShift, _exchangeData); } //////////////////////// INTERNAL FUNCTIONS ////////////////////////// function _callCloseAndOpen( LoanShiftData memory _loanShift, SaverExchangeCore.ExchangeData memory _exchangeData ) internal { address protoAddr = shifterRegistry.getAddr(getNameByProtocol(uint8(_loanShift.fromProtocol))); uint loanAmount = _loanShift.debtAmount; if (_loanShift.wholeDebt) { loanAmount = ILoanShifter(protoAddr).getLoanAmount(_loanShift.id1, _loanShift.addrLoan1); } ( uint[8] memory numData, address[8] memory addrData, uint8[3] memory enumData, bytes memory callData ) = _packData(_loanShift, _exchangeData); // encode data bytes memory paramsData = abi.encode(numData, addrData, enumData, callData, address(this)); address payable loanShifterReceiverAddr = payable(shifterRegistry.getAddr("LOAN_SHIFTER_RECEIVER")); // call FL givePermission(loanShifterReceiverAddr); lendingPool.flashLoan(loanShifterReceiverAddr, getLoanAddr(_loanShift.debtAddr1, _loanShift.fromProtocol), loanAmount, paramsData); removePermission(loanShifterReceiverAddr); } function _forkVault(LoanShiftData memory _loanShift) internal { // Create new Vault to move to if (_loanShift.id2 == 0) { _loanShift.id2 = manager.open(manager.ilks(_loanShift.id1), address(this)); } if (_loanShift.wholeDebt) { manager.shift(_loanShift.id1, _loanShift.id2); } } function _isSameTypeVaults(LoanShiftData memory _loanShift) internal pure returns (bool) { return _loanShift.fromProtocol == Protocols.MCD && _loanShift.toProtocol == Protocols.MCD && _loanShift.addrLoan1 == _loanShift.addrLoan2; } function getNameByProtocol(uint8 _proto) internal pure returns (string memory) { if (_proto == 0) { return "MCD_SHIFTER"; } else if (_proto == 1) { return "COMP_SHIFTER"; } } function getLoanAddr(address _address, Protocols _fromProtocol) internal returns (address) { if (_fromProtocol == Protocols.COMPOUND) { return CTokenInterface(_address).underlying(); } else if (_fromProtocol == Protocols.MCD) { return DAI_ADDRESS; } else { return address(0); } } function _packData( LoanShiftData memory _loanShift, SaverExchangeCore.ExchangeData memory exchangeData ) internal pure returns (uint[8] memory numData, address[8] memory addrData, uint8[3] memory enumData, bytes memory callData) { numData = [ _loanShift.collAmount, _loanShift.debtAmount, _loanShift.id1, _loanShift.id2, exchangeData.srcAmount, exchangeData.destAmount, exchangeData.minPrice, exchangeData.price0x ]; addrData = [ _loanShift.addrLoan1, _loanShift.addrLoan2, _loanShift.debtAddr1, _loanShift.debtAddr2, exchangeData.srcAddr, exchangeData.destAddr, exchangeData.exchangeAddr, exchangeData.wrapper ]; enumData = [ uint8(_loanShift.fromProtocol), uint8(_loanShift.toProtocol), uint8(_loanShift.swapType) ]; callData = exchangeData.callData; } } contract ShifterRegistry is AdminAuth { mapping (string => address) public contractAddresses; bool public finalized; function changeContractAddr(string memory _contractName, address _protoAddr) public onlyOwner { require(!finalized); contractAddresses[_contractName] = _protoAddr; } function lock() public onlyOwner { finalized = true; } function getAddr(string memory _contractName) public view returns (address contractAddr) { contractAddr = contractAddresses[_contractName]; require(contractAddr != address(0), "No contract address registred"); } } library Address { function isContract(address account) internal view returns (bool) { // According to EIP-1052, 0x0 is the value returned for not-yet created accounts // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned // for accounts without code, i.e. `keccak256('')` bytes32 codehash; bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470; // solhint-disable-next-line no-inline-assembly assembly { codehash := extcodehash(account) } return (codehash != accountHash && codehash != 0x0); } function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return _functionCallWithValue(target, data, 0, errorMessage); } function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); return _functionCallWithValue(target, data, value, errorMessage); } function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) { require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: weiValue }(data); if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } contract DFSProxy is Auth { string public constant NAME = "DFSProxy"; string public constant VERSION = "v0.1"; mapping(address => mapping(uint => bool)) public nonces; // --- EIP712 niceties --- bytes32 public DOMAIN_SEPARATOR; bytes32 public constant PERMIT_TYPEHASH = keccak256("callProxy(address _user,address _proxy,address _contract,bytes _txData,uint256 _nonce)"); constructor(uint256 chainId_) public { DOMAIN_SEPARATOR = keccak256(abi.encode( keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"), keccak256(bytes(NAME)), keccak256(bytes(VERSION)), chainId_, address(this) )); } function callProxy(address _user, address _proxy, address _contract, bytes calldata _txData, uint256 _nonce, uint8 _v, bytes32 _r, bytes32 _s) external payable onlyAuthorized { bytes32 digest = keccak256(abi.encodePacked( "\x19\x01", DOMAIN_SEPARATOR, keccak256(abi.encode(PERMIT_TYPEHASH, _user, _proxy, _contract, _txData, _nonce)) )); // user must be proxy owner require(DSProxyInterface(_proxy).owner() == _user); require(_user == ecrecover(digest, _v, _r, _s), "DFSProxy/user-not-valid"); require(!nonces[_user][_nonce], "DFSProxy/invalid-nonce"); nonces[_user][_nonce] = true; DSProxyInterface(_proxy).execute{value: msg.value}(_contract, _txData); } } contract DebugInfo { mapping (string => uint) public uintValues; mapping (string => address) public addrValues; mapping (string => string) public stringValues; mapping (string => bytes32) public bytes32Values; function logUint(string memory _id, uint _value) public { uintValues[_id] = _value; } function logAddr(string memory _id, address _value) public { addrValues[_id] = _value; } function logString(string memory _id, string memory _value) public { stringValues[_id] = _value; } function logBytes32(string memory _id, bytes32 _value) public { bytes32Values[_id] = _value; } } contract Discount { address public owner; mapping(address => CustomServiceFee) public serviceFees; uint256 constant MAX_SERVICE_FEE = 400; struct CustomServiceFee { bool active; uint256 amount; } constructor() public { owner = msg.sender; } function isCustomFeeSet(address _user) public view returns (bool) { return serviceFees[_user].active; } function getCustomServiceFee(address _user) public view returns (uint256) { return serviceFees[_user].amount; } function setServiceFee(address _user, uint256 _fee) public { require(msg.sender == owner, "Only owner"); require(_fee >= MAX_SERVICE_FEE || _fee == 0); serviceFees[_user] = CustomServiceFee({active: true, amount: _fee}); } function disableServiceFee(address _user) public { require(msg.sender == owner, "Only owner"); serviceFees[_user] = CustomServiceFee({active: false, amount: 0}); } } contract DydxFlashLoanBase { using SafeMath for uint256; address public constant SOLO_MARGIN_ADDRESS = 0x1E0447b19BB6EcFdAe1e4AE1694b0C3659614e4e; function _getMarketIdFromTokenAddress(address token) internal view returns (uint256) { return 0; } function _getRepaymentAmountInternal(uint256 amount) internal view returns (uint256) { // Needs to be overcollateralize // Needs to provide +2 wei to be safe return amount.add(2); } function _getAccountInfo() internal view returns (Account.Info memory) { return Account.Info({owner: address(this), number: 1}); } function _getWithdrawAction(uint marketId, uint256 amount, address contractAddr) internal view returns (Actions.ActionArgs memory) { return Actions.ActionArgs({ actionType: Actions.ActionType.Withdraw, accountId: 0, amount: Types.AssetAmount({ sign: false, denomination: Types.AssetDenomination.Wei, ref: Types.AssetReference.Delta, value: amount }), primaryMarketId: marketId, secondaryMarketId: 0, otherAddress: contractAddr, otherAccountId: 0, data: "" }); } function _getCallAction(bytes memory data, address contractAddr) internal view returns (Actions.ActionArgs memory) { return Actions.ActionArgs({ actionType: Actions.ActionType.Call, accountId: 0, amount: Types.AssetAmount({ sign: false, denomination: Types.AssetDenomination.Wei, ref: Types.AssetReference.Delta, value: 0 }), primaryMarketId: 0, secondaryMarketId: 0, otherAddress: contractAddr, otherAccountId: 0, data: data }); } function _getDepositAction(uint marketId, uint256 amount, address contractAddr) internal view returns (Actions.ActionArgs memory) { return Actions.ActionArgs({ actionType: Actions.ActionType.Deposit, accountId: 0, amount: Types.AssetAmount({ sign: true, denomination: Types.AssetDenomination.Wei, ref: Types.AssetReference.Delta, value: amount }), primaryMarketId: marketId, secondaryMarketId: 0, otherAddress: contractAddr, otherAccountId: 0, data: "" }); } } contract ExchangeDataParser { function decodeExchangeData( SaverExchangeCore.ExchangeData memory exchangeData ) internal pure returns (address[4] memory, uint[4] memory, bytes memory) { return ( [exchangeData.srcAddr, exchangeData.destAddr, exchangeData.exchangeAddr, exchangeData.wrapper], [exchangeData.srcAmount, exchangeData.destAmount, exchangeData.minPrice, exchangeData.price0x], exchangeData.callData ); } function encodeExchangeData( address[4] memory exAddr, uint[4] memory exNum, bytes memory callData ) internal pure returns (SaverExchangeCore.ExchangeData memory) { return SaverExchangeCore.ExchangeData({ srcAddr: exAddr[0], destAddr: exAddr[1], srcAmount: exNum[0], destAmount: exNum[1], minPrice: exNum[2], wrapper: exAddr[3], exchangeAddr: exAddr[2], callData: callData, price0x: exNum[3] }); } } interface IFlashLoanReceiver { function executeOperation(address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external; } abstract contract ILendingPoolAddressesProvider { function getLendingPool() public view virtual returns (address); function setLendingPoolImpl(address _pool) public virtual; function getLendingPoolCore() public virtual view returns (address payable); function setLendingPoolCoreImpl(address _lendingPoolCore) public virtual; function getLendingPoolConfigurator() public virtual view returns (address); function setLendingPoolConfiguratorImpl(address _configurator) public virtual; function getLendingPoolDataProvider() public virtual view returns (address); function setLendingPoolDataProviderImpl(address _provider) public virtual; function getLendingPoolParametersProvider() public virtual view returns (address); function setLendingPoolParametersProviderImpl(address _parametersProvider) public virtual; function getTokenDistributor() public virtual view returns (address); function setTokenDistributor(address _tokenDistributor) public virtual; function getFeeProvider() public virtual view returns (address); function setFeeProviderImpl(address _feeProvider) public virtual; function getLendingPoolLiquidationManager() public virtual view returns (address); function setLendingPoolLiquidationManager(address _manager) public virtual; function getLendingPoolManager() public virtual view returns (address); function setLendingPoolManager(address _lendingPoolManager) public virtual; function getPriceOracle() public virtual view returns (address); function setPriceOracle(address _priceOracle) public virtual; function getLendingRateOracle() public view virtual returns (address); function setLendingRateOracle(address _lendingRateOracle) public virtual; } library EthAddressLib { function ethAddress() internal pure returns(address) { return 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; } } abstract contract FlashLoanReceiverBase is IFlashLoanReceiver { using SafeERC20 for ERC20; using SafeMath for uint256; ILendingPoolAddressesProvider public addressesProvider; constructor(ILendingPoolAddressesProvider _provider) public { addressesProvider = _provider; } receive () external virtual payable {} function transferFundsBackToPoolInternal(address _reserve, uint256 _amount) internal { address payable core = addressesProvider.getLendingPoolCore(); transferInternal(core,_reserve, _amount); } function transferInternal(address payable _destination, address _reserve, uint256 _amount) internal { if(_reserve == EthAddressLib.ethAddress()) { //solium-disable-next-line _destination.call{value: _amount}(""); return; } ERC20(_reserve).safeTransfer(_destination, _amount); } function getBalanceInternal(address _target, address _reserve) internal view returns(uint256) { if(_reserve == EthAddressLib.ethAddress()) { return _target.balance; } return ERC20(_reserve).balanceOf(_target); } } contract GasBurner { // solhint-disable-next-line const-name-snakecase GasTokenInterface public constant gasToken = GasTokenInterface(0x0000000000b3F879cb30FE243b4Dfee438691c04); modifier burnGas(uint _amount) { if (gasToken.balanceOf(address(this)) >= _amount) { gasToken.free(_amount); } _; } } library SafeERC20 { using SafeMath for uint256; using Address for address; function safeTransfer(ERC20 token, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } function safeTransferFrom(ERC20 token, address from, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value)); } /** * @dev Deprecated. This function has issues similar to the ones found in * {IERC20-approve}, and its usage is discouraged. */ function safeApprove(ERC20 token, address spender, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value)); } function safeIncreaseAllowance(ERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).add(value); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } function safeDecreaseAllowance(ERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero"); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } function _callOptionalReturn(ERC20 token, bytes memory data) private { bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed"); if (returndata.length > 0) { // Return data is optional // solhint-disable-next-line max-line-length require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } } } library SafeMath { function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } contract ZrxAllowlist is AdminAuth { mapping (address => bool) public zrxAllowlist; function setAllowlistAddr(address _zrxAddr, bool _state) public onlyOwner { zrxAllowlist[_zrxAddr] = _state; } function isZrxAddr(address _zrxAddr) public view returns (bool) { return zrxAllowlist[_zrxAddr]; } } contract AaveBasicProxy is GasBurner { using SafeERC20 for ERC20; address public constant ETH_ADDR = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant AAVE_LENDING_POOL_ADDRESSES = 0x24a42fD28C976A61Df5D00D0599C34c4f90748c8; uint16 public constant AAVE_REFERRAL_CODE = 64; /// @notice User deposits tokens to the Aave protocol /// @dev User needs to approve the DSProxy to pull the _tokenAddr tokens /// @param _tokenAddr The address of the token to be deposited /// @param _amount Amount of tokens to be deposited function deposit(address _tokenAddr, uint256 _amount) public burnGas(5) payable { address lendingPoolCore = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); uint ethValue = _amount; if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(this), _amount); approveToken(_tokenAddr, lendingPoolCore); ethValue = 0; } ILendingPool(lendingPool).deposit{value: ethValue}(_tokenAddr, _amount, AAVE_REFERRAL_CODE); setUserUseReserveAsCollateralIfNeeded(_tokenAddr); } /// @notice User withdraws tokens from the Aave protocol /// @param _tokenAddr The address of the token to be withdrawn /// @param _aTokenAddr ATokens to be withdrawn /// @param _amount Amount of tokens to be withdrawn /// @param _wholeAmount If true we will take the whole amount on chain function withdraw(address _tokenAddr, address _aTokenAddr, uint256 _amount, bool _wholeAmount) public burnGas(8) { uint256 amount = _wholeAmount ? ERC20(_aTokenAddr).balanceOf(address(this)) : _amount; IAToken(_aTokenAddr).redeem(amount); withdrawTokens(_tokenAddr); } /// @notice User borrows tokens to the Aave protocol /// @param _tokenAddr The address of the token to be borrowed /// @param _amount Amount of tokens to be borrowed /// @param _type Send 1 for variable rate and 2 for fixed rate function borrow(address _tokenAddr, uint256 _amount, uint256 _type) public burnGas(8) { address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); ILendingPool(lendingPool).borrow(_tokenAddr, _amount, _type, AAVE_REFERRAL_CODE); withdrawTokens(_tokenAddr); } /// @dev User needs to approve the DSProxy to pull the _tokenAddr tokens /// @notice User paybacks tokens to the Aave protocol /// @param _tokenAddr The address of the token to be paybacked /// @param _aTokenAddr ATokens to be paybacked /// @param _amount Amount of tokens to be payed back /// @param _wholeDebt If true the _amount will be set to the whole amount of the debt function payback(address _tokenAddr, address _aTokenAddr, uint256 _amount, bool _wholeDebt) public burnGas(3) payable { address lendingPoolCore = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); uint256 amount = _amount; if (_wholeDebt) { (,amount,,,,,,,,) = ILendingPool(lendingPool).getUserReserveData(_tokenAddr, address(this)); } if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(this), amount); approveToken(_tokenAddr, lendingPoolCore); } ILendingPool(lendingPool).repay{value: msg.value}(_tokenAddr, amount, payable(address(this))); withdrawTokens(_tokenAddr); } /// @dev User needs to approve the DSProxy to pull the _tokenAddr tokens /// @notice User paybacks tokens to the Aave protocol /// @param _tokenAddr The address of the token to be paybacked /// @param _aTokenAddr ATokens to be paybacked /// @param _amount Amount of tokens to be payed back /// @param _wholeDebt If true the _amount will be set to the whole amount of the debt function paybackOnBehalf(address _tokenAddr, address _aTokenAddr, uint256 _amount, bool _wholeDebt, address payable _onBehalf) public burnGas(3) payable { address lendingPoolCore = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); uint256 amount = _amount; if (_wholeDebt) { (,amount,,,,,,,,) = ILendingPool(lendingPool).getUserReserveData(_tokenAddr, _onBehalf); } if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(this), amount); approveToken(_tokenAddr, lendingPoolCore); } ILendingPool(lendingPool).repay{value: msg.value}(_tokenAddr, amount, _onBehalf); withdrawTokens(_tokenAddr); } /// @notice Helper method to withdraw tokens from the DSProxy /// @param _tokenAddr Address of the token to be withdrawn function withdrawTokens(address _tokenAddr) public { uint256 amount = _tokenAddr == ETH_ADDR ? address(this).balance : ERC20(_tokenAddr).balanceOf(address(this)); if (amount > 0) { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransfer(msg.sender, amount); } else { msg.sender.transfer(amount); } } } /// @notice Approves token contract to pull underlying tokens from the DSProxy /// @param _tokenAddr Token we are trying to approve /// @param _caller Address which will gain the approval function approveToken(address _tokenAddr, address _caller) internal { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeApprove(_caller, 0); ERC20(_tokenAddr).safeApprove(_caller, uint256(-1)); } } function setUserUseReserveAsCollateralIfNeeded(address _tokenAddr) public { address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); (,,,,,,,,,bool collateralEnabled) = ILendingPool(lendingPool).getUserReserveData(_tokenAddr, address(this)); if (!collateralEnabled) { ILendingPool(lendingPool).setUserUseReserveAsCollateral(_tokenAddr, true); } } function setUserUseReserveAsCollateral(address _tokenAddr, bool _true) public { address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); ILendingPool(lendingPool).setUserUseReserveAsCollateral(_tokenAddr, _true); } function swapBorrowRateMode(address _reserve) public { address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); ILendingPool(lendingPool).swapBorrowRateMode(_reserve); } } contract AaveLoanInfo is AaveSafetyRatio { struct LoanData { address user; uint128 ratio; address[] collAddr; address[] borrowAddr; uint256[] collAmounts; uint256[] borrowAmounts; } struct TokenInfo { address aTokenAddress; address underlyingTokenAddress; uint256 collateralFactor; uint256 price; } struct TokenInfoFull { address aTokenAddress; address underlyingTokenAddress; uint256 supplyRate; uint256 borrowRate; uint256 totalSupply; uint256 availableLiquidity; uint256 totalBorrow; uint256 collateralFactor; uint256 price; bool usageAsCollateralEnabled; } /// @notice Calcualted the ratio of coll/debt for a compound user /// @param _user Address of the user function getRatio(address _user) public view returns (uint256) { // For each asset the account is in return getSafetyRatio(_user); } /// @notice Fetches Aave prices for tokens /// @param _tokens Arr. of tokens for which to get the prices /// @return prices Array of prices function getPrices(address[] memory _tokens) public view returns (uint256[] memory prices) { address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); prices = new uint[](_tokens.length); for (uint256 i = 0; i < _tokens.length; ++i) { prices[i] = IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_tokens[i]); } } /// @notice Fetches Aave collateral factors for tokens /// @param _tokens Arr. of tokens for which to get the coll. factors /// @return collFactors Array of coll. factors function getCollFactors(address[] memory _tokens) public view returns (uint256[] memory collFactors) { address lendingPoolCoreAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); collFactors = new uint256[](_tokens.length); for (uint256 i = 0; i < _tokens.length; ++i) { (,collFactors[i],,) = ILendingPool(lendingPoolCoreAddress).getReserveConfiguration(_tokens[i]); } } function getTokenBalances(address _user, address[] memory _tokens) public view returns (uint256[] memory balances, uint256[] memory borrows, bool[] memory enabledAsCollateral) { address lendingPoolAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); balances = new uint256[](_tokens.length); borrows = new uint256[](_tokens.length); enabledAsCollateral = new bool[](_tokens.length); for (uint256 i = 0; i < _tokens.length; i++) { address asset = _tokens[i]; (balances[i], borrows[i],,,,,,,,enabledAsCollateral[i]) = ILendingPool(lendingPoolAddress).getUserReserveData(asset, _user); } } /// @notice Calcualted the ratio of coll/debt for an aave user /// @param _users Addresses of the user /// @return ratios Array of ratios function getRatios(address[] memory _users) public view returns (uint256[] memory ratios) { ratios = new uint256[](_users.length); for (uint256 i = 0; i < _users.length; ++i) { ratios[i] = getSafetyRatio(_users[i]); } } /// @notice Information about reserves /// @param _tokenAddresses Array of tokens addresses /// @return tokens Array of reserves infomartion function getTokensInfo(address[] memory _tokenAddresses) public view returns(TokenInfo[] memory tokens) { address lendingPoolCoreAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); tokens = new TokenInfo[](_tokenAddresses.length); for (uint256 i = 0; i < _tokenAddresses.length; ++i) { (,uint256 ltv,,) = ILendingPool(lendingPoolCoreAddress).getReserveConfiguration(_tokenAddresses[i]); tokens[i] = TokenInfo({ aTokenAddress: ILendingPool(lendingPoolCoreAddress).getReserveATokenAddress(_tokenAddresses[i]), underlyingTokenAddress: _tokenAddresses[i], collateralFactor: ltv, price: IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_tokenAddresses[i]) }); } } /// @notice Information about reserves /// @param _tokenAddresses Array of token addresses /// @return tokens Array of reserves infomartion function getFullTokensInfo(address[] memory _tokenAddresses) public view returns(TokenInfoFull[] memory tokens) { address lendingPoolCoreAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); tokens = new TokenInfoFull[](_tokenAddresses.length); for (uint256 i = 0; i < _tokenAddresses.length; ++i) { (,uint256 ltv,,bool usageAsCollateralEnabled) = ILendingPool(lendingPoolCoreAddress).getReserveConfiguration(_tokenAddresses[i]); tokens[i] = TokenInfoFull({ aTokenAddress: ILendingPool(lendingPoolCoreAddress).getReserveATokenAddress(_tokenAddresses[i]), underlyingTokenAddress: _tokenAddresses[i], supplyRate: ILendingPool(lendingPoolCoreAddress).getReserveCurrentLiquidityRate(_tokenAddresses[i]), borrowRate: ILendingPool(lendingPoolCoreAddress).getReserveCurrentVariableBorrowRate(_tokenAddresses[i]), totalSupply: ILendingPool(lendingPoolCoreAddress).getReserveTotalLiquidity(_tokenAddresses[i]), availableLiquidity: ILendingPool(lendingPoolCoreAddress).getReserveAvailableLiquidity(_tokenAddresses[i]), totalBorrow: ILendingPool(lendingPoolCoreAddress).getReserveTotalBorrowsVariable(_tokenAddresses[i]), collateralFactor: ltv, price: IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_tokenAddresses[i]), usageAsCollateralEnabled: usageAsCollateralEnabled }); } } /// @notice Fetches all the collateral/debt address and amounts, denominated in ether /// @param _user Address of the user /// @return data LoanData information function getLoanData(address _user) public view returns (LoanData memory data) { address lendingPoolAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); address[] memory reserves = ILendingPool(lendingPoolAddress).getReserves(); data = LoanData({ user: _user, ratio: 0, collAddr: new address[](reserves.length), borrowAddr: new address[](reserves.length), collAmounts: new uint[](reserves.length), borrowAmounts: new uint[](reserves.length) }); uint64 collPos = 0; uint64 borrowPos = 0; for (uint64 i = 0; i < reserves.length; i++) { address reserve = reserves[i]; (uint256 aTokenBalance, uint256 borrowBalance,,,,,,,,) = ILendingPool(lendingPoolAddress).getUserReserveData(reserve, _user); uint256 price = IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(reserves[i]); if (aTokenBalance > 0) { uint256 userTokenBalanceEth = wmul(aTokenBalance, price); data.collAddr[collPos] = reserve; data.collAmounts[collPos] = userTokenBalanceEth; collPos++; } // Sum up debt in Eth if (borrowBalance > 0) { uint256 userBorrowBalanceEth = wmul(borrowBalance, price); data.borrowAddr[borrowPos] = reserve; data.borrowAmounts[borrowPos] = userBorrowBalanceEth; borrowPos++; } } data.ratio = uint128(getSafetyRatio(_user)); return data; } /// @notice Fetches all the collateral/debt address and amounts, denominated in ether /// @param _users Addresses of the user /// @return loans Array of LoanData information function getLoanDataArr(address[] memory _users) public view returns (LoanData[] memory loans) { loans = new LoanData[](_users.length); for (uint i = 0; i < _users.length; ++i) { loans[i] = getLoanData(_users[i]); } } } contract AaveMonitor is AdminAuth, DSMath, AaveSafetyRatio, GasBurner { using SafeERC20 for ERC20; enum Method { Boost, Repay } uint public REPAY_GAS_TOKEN = 19; uint public BOOST_GAS_TOKEN = 19; uint public MAX_GAS_PRICE = 200000000000; // 200 gwei uint public REPAY_GAS_COST = 2000000; uint public BOOST_GAS_COST = 2000000; address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; AaveMonitorProxy public aaveMonitorProxy; AaveSubscriptions public subscriptionsContract; address public aaveSaverProxy; DefisaverLogger public logger = DefisaverLogger(DEFISAVER_LOGGER); /// @dev Addresses that are able to call methods for repay and boost mapping(address => bool) public approvedCallers; modifier onlyApproved() { require(approvedCallers[msg.sender]); _; } /// @param _aaveMonitorProxy Proxy contracts that actually is authorized to call DSProxy /// @param _subscriptions Subscriptions contract for Aave positions /// @param _aaveSaverProxy Contract that actually performs Repay/Boost constructor(address _aaveMonitorProxy, address _subscriptions, address _aaveSaverProxy) public { approvedCallers[msg.sender] = true; aaveMonitorProxy = AaveMonitorProxy(_aaveMonitorProxy); subscriptionsContract = AaveSubscriptions(_subscriptions); aaveSaverProxy = _aaveSaverProxy; } /// @notice Bots call this method to repay for user when conditions are met /// @dev If the contract ownes gas token it will try and use it for gas price reduction /// @param _exData Exchange data /// @param _user The actual address that owns the Aave position function repayFor( SaverExchangeCore.ExchangeData memory _exData, address _user ) public payable onlyApproved burnGas(REPAY_GAS_TOKEN) { (bool isAllowed, uint ratioBefore) = canCall(Method.Repay, _user); require(isAllowed); // check if conditions are met uint256 gasCost = calcGasCost(REPAY_GAS_COST); aaveMonitorProxy.callExecute{value: msg.value}( _user, aaveSaverProxy, abi.encodeWithSignature( "repay((address,address,uint256,uint256,uint256,address,address,bytes,uint256),uint256)", _exData, gasCost ) ); (bool isGoodRatio, uint ratioAfter) = ratioGoodAfter(Method.Repay, _user); require(isGoodRatio); // check if the after result of the actions is good returnEth(); logger.Log(address(this), _user, "AutomaticAaveRepay", abi.encode(ratioBefore, ratioAfter)); } /// @notice Bots call this method to boost for user when conditions are met /// @dev If the contract ownes gas token it will try and use it for gas price reduction /// @param _exData Exchange data /// @param _user The actual address that owns the Aave position function boostFor( SaverExchangeCore.ExchangeData memory _exData, address _user ) public payable onlyApproved burnGas(BOOST_GAS_TOKEN) { (bool isAllowed, uint ratioBefore) = canCall(Method.Boost, _user); require(isAllowed); // check if conditions are met uint256 gasCost = calcGasCost(BOOST_GAS_COST); aaveMonitorProxy.callExecute{value: msg.value}( _user, aaveSaverProxy, abi.encodeWithSignature( "boost((address,address,uint256,uint256,uint256,address,address,bytes,uint256),uint256)", _exData, gasCost ) ); (bool isGoodRatio, uint ratioAfter) = ratioGoodAfter(Method.Boost, _user); require(isGoodRatio); // check if the after result of the actions is good returnEth(); logger.Log(address(this), _user, "AutomaticAaveBoost", abi.encode(ratioBefore, ratioAfter)); } /******************* INTERNAL METHODS ********************************/ function returnEth() internal { // return if some eth left if (address(this).balance > 0) { msg.sender.transfer(address(this).balance); } } /******************* STATIC METHODS ********************************/ /// @notice Checks if Boost/Repay could be triggered for the CDP /// @dev Called by AaveMonitor to enforce the min/max check /// @param _method Type of action to be called /// @param _user The actual address that owns the Aave position /// @return Boolean if it can be called and the ratio function canCall(Method _method, address _user) public view returns(bool, uint) { bool subscribed = subscriptionsContract.isSubscribed(_user); AaveSubscriptions.AaveHolder memory holder = subscriptionsContract.getHolder(_user); // check if cdp is subscribed if (!subscribed) return (false, 0); // check if boost and boost allowed if (_method == Method.Boost && !holder.boostEnabled) return (false, 0); uint currRatio = getSafetyRatio(_user); if (_method == Method.Repay) { return (currRatio < holder.minRatio, currRatio); } else if (_method == Method.Boost) { return (currRatio > holder.maxRatio, currRatio); } } /// @dev After the Boost/Repay check if the ratio doesn't trigger another call /// @param _method Type of action to be called /// @param _user The actual address that owns the Aave position /// @return Boolean if the recent action preformed correctly and the ratio function ratioGoodAfter(Method _method, address _user) public view returns(bool, uint) { AaveSubscriptions.AaveHolder memory holder; holder= subscriptionsContract.getHolder(_user); uint currRatio = getSafetyRatio(_user); if (_method == Method.Repay) { return (currRatio < holder.maxRatio, currRatio); } else if (_method == Method.Boost) { return (currRatio > holder.minRatio, currRatio); } } /// @notice Calculates gas cost (in Eth) of tx /// @dev Gas price is limited to MAX_GAS_PRICE to prevent attack of draining user CDP /// @param _gasAmount Amount of gas used for the tx function calcGasCost(uint _gasAmount) public view returns (uint) { uint gasPrice = tx.gasprice <= MAX_GAS_PRICE ? tx.gasprice : MAX_GAS_PRICE; return mul(gasPrice, _gasAmount); } /******************* OWNER ONLY OPERATIONS ********************************/ /// @notice Allows owner to change gas cost for boost operation, but only up to 3 millions /// @param _gasCost New gas cost for boost method function changeBoostGasCost(uint _gasCost) public onlyOwner { require(_gasCost < 3000000); BOOST_GAS_COST = _gasCost; } /// @notice Allows owner to change gas cost for repay operation, but only up to 3 millions /// @param _gasCost New gas cost for repay method function changeRepayGasCost(uint _gasCost) public onlyOwner { require(_gasCost < 3000000); REPAY_GAS_COST = _gasCost; } /// @notice Allows owner to change max gas price /// @param _maxGasPrice New max gas price function changeMaxGasPrice(uint _maxGasPrice) public onlyOwner { require(_maxGasPrice < 500000000000); MAX_GAS_PRICE = _maxGasPrice; } /// @notice Allows owner to change gas token amount /// @param _gasTokenAmount New gas token amount /// @param _repay true if repay gas token, false if boost gas token function changeGasTokenAmount(uint _gasTokenAmount, bool _repay) public onlyOwner { if (_repay) { REPAY_GAS_TOKEN = _gasTokenAmount; } else { BOOST_GAS_TOKEN = _gasTokenAmount; } } /// @notice Adds a new bot address which will be able to call repay/boost /// @param _caller Bot address function addCaller(address _caller) public onlyOwner { approvedCallers[_caller] = true; } /// @notice Removes a bot address so it can't call repay/boost /// @param _caller Bot address function removeCaller(address _caller) public onlyOwner { approvedCallers[_caller] = false; } } contract AaveMonitorProxy is AdminAuth { using SafeERC20 for ERC20; uint public CHANGE_PERIOD; address public monitor; address public newMonitor; address public lastMonitor; uint public changeRequestedTimestamp; mapping(address => bool) public allowed; event MonitorChangeInitiated(address oldMonitor, address newMonitor); event MonitorChangeCanceled(); event MonitorChangeFinished(address monitor); event MonitorChangeReverted(address monitor); // if someone who is allowed become malicious, owner can't be changed modifier onlyAllowed() { require(allowed[msg.sender] || msg.sender == owner); _; } modifier onlyMonitor() { require (msg.sender == monitor); _; } constructor(uint _changePeriod) public { CHANGE_PERIOD = _changePeriod * 1 days; } /// @notice Only monitor contract is able to call execute on users proxy /// @param _owner Address of cdp owner (users DSProxy address) /// @param _aaveSaverProxy Address of AaveSaverProxy /// @param _data Data to send to AaveSaverProxy function callExecute(address _owner, address _aaveSaverProxy, bytes memory _data) public payable onlyMonitor { // execute reverts if calling specific method fails DSProxyInterface(_owner).execute{value: msg.value}(_aaveSaverProxy, _data); // return if anything left if (address(this).balance > 0) { msg.sender.transfer(address(this).balance); } } /// @notice Allowed users are able to set Monitor contract without any waiting period first time /// @param _monitor Address of Monitor contract function setMonitor(address _monitor) public onlyAllowed { require(monitor == address(0)); monitor = _monitor; } /// @notice Allowed users are able to start procedure for changing monitor /// @dev after CHANGE_PERIOD needs to call confirmNewMonitor to actually make a change /// @param _newMonitor address of new monitor function changeMonitor(address _newMonitor) public onlyAllowed { require(changeRequestedTimestamp == 0); changeRequestedTimestamp = now; lastMonitor = monitor; newMonitor = _newMonitor; emit MonitorChangeInitiated(lastMonitor, newMonitor); } /// @notice At any point allowed users are able to cancel monitor change function cancelMonitorChange() public onlyAllowed { require(changeRequestedTimestamp > 0); changeRequestedTimestamp = 0; newMonitor = address(0); emit MonitorChangeCanceled(); } /// @notice Anyone is able to confirm new monitor after CHANGE_PERIOD if process is started function confirmNewMonitor() public onlyAllowed { require((changeRequestedTimestamp + CHANGE_PERIOD) < now); require(changeRequestedTimestamp != 0); require(newMonitor != address(0)); monitor = newMonitor; newMonitor = address(0); changeRequestedTimestamp = 0; emit MonitorChangeFinished(monitor); } /// @notice Its possible to revert monitor to last used monitor function revertMonitor() public onlyAllowed { require(lastMonitor != address(0)); monitor = lastMonitor; emit MonitorChangeReverted(monitor); } /// @notice Allowed users are able to add new allowed user /// @param _user Address of user that will be allowed function addAllowed(address _user) public onlyAllowed { allowed[_user] = true; } /// @notice Allowed users are able to remove allowed user /// @dev owner is always allowed even if someone tries to remove it from allowed mapping /// @param _user Address of allowed user function removeAllowed(address _user) public onlyAllowed { allowed[_user] = false; } function setChangePeriod(uint _periodInDays) public onlyAllowed { require(_periodInDays * 1 days > CHANGE_PERIOD); CHANGE_PERIOD = _periodInDays * 1 days; } /// @notice In case something is left in contract, owner is able to withdraw it /// @param _token address of token to withdraw balance function withdrawToken(address _token) public onlyOwner { uint balance = ERC20(_token).balanceOf(address(this)); ERC20(_token).safeTransfer(msg.sender, balance); } /// @notice In case something is left in contract, owner is able to withdraw it function withdrawEth() public onlyOwner { uint balance = address(this).balance; msg.sender.transfer(balance); } } contract AaveSubscriptions is AdminAuth { struct AaveHolder { address user; uint128 minRatio; uint128 maxRatio; uint128 optimalRatioBoost; uint128 optimalRatioRepay; bool boostEnabled; } struct SubPosition { uint arrPos; bool subscribed; } AaveHolder[] public subscribers; mapping (address => SubPosition) public subscribersPos; uint public changeIndex; event Subscribed(address indexed user); event Unsubscribed(address indexed user); event Updated(address indexed user); event ParamUpdates(address indexed user, uint128, uint128, uint128, uint128, bool); /// @dev Called by the DSProxy contract which owns the Aave position /// @notice Adds the users Aave poistion in the list of subscriptions so it can be monitored /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalBoost Ratio amount which boost should target /// @param _optimalRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled function subscribe(uint128 _minRatio, uint128 _maxRatio, uint128 _optimalBoost, uint128 _optimalRepay, bool _boostEnabled) external { // if boost is not enabled, set max ratio to max uint uint128 localMaxRatio = _boostEnabled ? _maxRatio : uint128(-1); require(checkParams(_minRatio, localMaxRatio), "Must be correct params"); SubPosition storage subInfo = subscribersPos[msg.sender]; AaveHolder memory subscription = AaveHolder({ minRatio: _minRatio, maxRatio: localMaxRatio, optimalRatioBoost: _optimalBoost, optimalRatioRepay: _optimalRepay, user: msg.sender, boostEnabled: _boostEnabled }); changeIndex++; if (subInfo.subscribed) { subscribers[subInfo.arrPos] = subscription; emit Updated(msg.sender); emit ParamUpdates(msg.sender, _minRatio, localMaxRatio, _optimalBoost, _optimalRepay, _boostEnabled); } else { subscribers.push(subscription); subInfo.arrPos = subscribers.length - 1; subInfo.subscribed = true; emit Subscribed(msg.sender); } } /// @notice Called by the users DSProxy /// @dev Owner who subscribed cancels his subscription function unsubscribe() external { _unsubscribe(msg.sender); } /// @dev Checks limit if minRatio is bigger than max /// @param _minRatio Minimum ratio, bellow which repay can be triggered /// @param _maxRatio Maximum ratio, over which boost can be triggered /// @return Returns bool if the params are correct function checkParams(uint128 _minRatio, uint128 _maxRatio) internal pure returns (bool) { if (_minRatio > _maxRatio) { return false; } return true; } /// @dev Internal method to remove a subscriber from the list /// @param _user The actual address that owns the Aave position function _unsubscribe(address _user) internal { require(subscribers.length > 0, "Must have subscribers in the list"); SubPosition storage subInfo = subscribersPos[_user]; require(subInfo.subscribed, "Must first be subscribed"); address lastOwner = subscribers[subscribers.length - 1].user; SubPosition storage subInfo2 = subscribersPos[lastOwner]; subInfo2.arrPos = subInfo.arrPos; subscribers[subInfo.arrPos] = subscribers[subscribers.length - 1]; subscribers.pop(); // remove last element and reduce arr length changeIndex++; subInfo.subscribed = false; subInfo.arrPos = 0; emit Unsubscribed(msg.sender); } /// @dev Checks if the user is subscribed /// @param _user The actual address that owns the Aave position /// @return If the user is subscribed function isSubscribed(address _user) public view returns (bool) { SubPosition storage subInfo = subscribersPos[_user]; return subInfo.subscribed; } /// @dev Returns subscribtion information about a user /// @param _user The actual address that owns the Aave position /// @return Subscription information about the user if exists function getHolder(address _user) public view returns (AaveHolder memory) { SubPosition storage subInfo = subscribersPos[_user]; return subscribers[subInfo.arrPos]; } /// @notice Helper method to return all the subscribed CDPs /// @return List of all subscribers function getSubscribers() public view returns (AaveHolder[] memory) { return subscribers; } /// @notice Helper method for the frontend, returns all the subscribed CDPs paginated /// @param _page What page of subscribers you want /// @param _perPage Number of entries per page /// @return List of all subscribers for that page function getSubscribersByPage(uint _page, uint _perPage) public view returns (AaveHolder[] memory) { AaveHolder[] memory holders = new AaveHolder[](_perPage); uint start = _page * _perPage; uint end = start + _perPage; end = (end > holders.length) ? holders.length : end; uint count = 0; for (uint i = start; i < end; i++) { holders[count] = subscribers[i]; count++; } return holders; } ////////////// ADMIN METHODS /////////////////// /// @notice Admin function to unsubscribe a position /// @param _user The actual address that owns the Aave position function unsubscribeByAdmin(address _user) public onlyOwner { SubPosition storage subInfo = subscribersPos[_user]; if (subInfo.subscribed) { _unsubscribe(_user); } } } contract AaveSubscriptionsProxy is ProxyPermission { address public constant AAVE_SUBSCRIPTION_ADDRESS = 0xe08ff7A2BADb634F0b581E675E6B3e583De086FC; address public constant AAVE_MONITOR_PROXY = 0xfA560Dba3a8D0B197cA9505A2B98120DD89209AC; /// @notice Calls subscription contract and creates a DSGuard if non existent /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalRatioBoost Ratio amount which boost should target /// @param _optimalRatioRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled function subscribe( uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled ) public { givePermission(AAVE_MONITOR_PROXY); IAaveSubscription(AAVE_SUBSCRIPTION_ADDRESS).subscribe( _minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled); } /// @notice Calls subscription contract and updated existing parameters /// @dev If subscription is non existent this will create one /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalRatioBoost Ratio amount which boost should target /// @param _optimalRatioRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled function update( uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled ) public { IAaveSubscription(AAVE_SUBSCRIPTION_ADDRESS).subscribe(_minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled); } /// @notice Calls the subscription contract to unsubscribe the caller function unsubscribe() public { removePermission(AAVE_MONITOR_PROXY); IAaveSubscription(AAVE_SUBSCRIPTION_ADDRESS).unsubscribe(); } } contract AaveImport is AaveHelper, AdminAuth { using SafeERC20 for ERC20; address public constant WETH_ADDRESS = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address public constant BASIC_PROXY = 0x9D266997bc73B27d4302E711b55FD78B5278e1De; address public constant AETH_ADDRESS = 0x3a3A65aAb0dd2A17E3F1947bA16138cd37d08c04; function callFunction( address sender, Account.Info memory account, bytes memory data ) public { ( address collateralToken, address borrowToken, uint256 ethAmount, address user, address proxy ) = abi.decode(data, (address,address,uint256,address,address)); address payable payableProxy = payable(proxy); // withdraw eth TokenInterface(WETH_ADDRESS).withdraw(ethAmount); address lendingPoolCoreAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); address aCollateralToken = ILendingPool(lendingPoolCoreAddress).getReserveATokenAddress(collateralToken); address aBorrowToken = ILendingPool(lendingPoolCoreAddress).getReserveATokenAddress(borrowToken); // deposit eth on behalf of proxy DSProxy(payableProxy).execute{value: ethAmount}(BASIC_PROXY, abi.encodeWithSignature("deposit(address,uint256)", ETH_ADDR, ethAmount)); // borrow needed amount to repay users borrow (,uint256 borrowAmount,,uint256 borrowRateMode,,,,,,) = ILendingPool(lendingPool).getUserReserveData(borrowToken, user); DSProxy(payableProxy).execute(BASIC_PROXY, abi.encodeWithSignature("borrow(address,uint256,uint256)", borrowToken, borrowAmount, borrowRateMode)); // payback on behalf of user ERC20(borrowToken).safeApprove(proxy, borrowAmount); DSProxy(payableProxy).execute(BASIC_PROXY, abi.encodeWithSignature("paybackOnBehalf(address,address,uint256,bool,address)", borrowToken, aBorrowToken, 0, true, user)); // pull tokens from user to proxy uint256 collateralAmount = ERC20(aCollateralToken).balanceOf(user); ERC20(aCollateralToken).safeTransferFrom(user, proxy, collateralAmount); // enable as collateral DSProxy(payableProxy).execute(BASIC_PROXY, abi.encodeWithSignature("setUserUseReserveAsCollateral(address)", collateralToken)); // withdraw deposited eth DSProxy(payableProxy).execute(BASIC_PROXY, abi.encodeWithSignature("withdraw(address,address,uint256,bool)", ETH_ADDR, AETH_ADDRESS, ethAmount, false)); // deposit eth, get weth and return to sender TokenInterface(WETH_ADDRESS).deposit.value(address(this).balance)(); ERC20(WETH_ADDRESS).safeTransfer(proxy, ethAmount+2); } /// @dev if contract receive eth, convert it to WETH receive() external payable { // deposit eth and get weth if (msg.sender == owner) { TokenInterface(WETH_ADDRESS).deposit.value(address(this).balance)(); } } } contract AaveImportTaker is DydxFlashLoanBase, ProxyPermission { address public constant WETH_ADDR = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address payable public constant AAVE_IMPORT = 0x56AC1EFC17ecDe083889520137B0cfb30d2cF384; address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; address public constant PROXY_REGISTRY_ADDRESS = 0x4678f0a6958e4D2Bc4F1BAF7Bc52E8F3564f3fE4; /// @notice Starts the process to move users position 1 collateral and 1 borrow /// @dev User must send 2 wei with this transaction /// @dev User must approve AaveImport to pull _aCollateralToken /// @param _collateralToken Collateral token we are moving to DSProxy /// @param _borrowToken Borrow token we are moving to DSProxy /// @param _ethAmount ETH amount that needs to be pulled from dydx function importLoan(address _collateralToken, address _borrowToken, uint _ethAmount) public { ISoloMargin solo = ISoloMargin(SOLO_MARGIN_ADDRESS); // Get marketId from token address uint256 marketId = _getMarketIdFromTokenAddress(WETH_ADDR); // Calculate repay amount (_amount + (2 wei)) // Approve transfer from uint256 repayAmount = _getRepaymentAmountInternal(_ethAmount); ERC20(WETH_ADDR).approve(SOLO_MARGIN_ADDRESS, repayAmount); Actions.ActionArgs[] memory operations = new Actions.ActionArgs[](3); operations[0] = _getWithdrawAction(marketId, _ethAmount, AAVE_IMPORT); operations[1] = _getCallAction( abi.encode(_collateralToken, _borrowToken, _ethAmount, msg.sender, address(this)), AAVE_IMPORT ); operations[2] = _getDepositAction(marketId, repayAmount, address(this)); Account.Info[] memory accountInfos = new Account.Info[](1); accountInfos[0] = _getAccountInfo(); givePermission(AAVE_IMPORT); solo.operate(accountInfos, operations); removePermission(AAVE_IMPORT); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "AaveImport", abi.encode(_collateralToken, _borrowToken)); } } contract CompoundBasicProxy is GasBurner { address public constant ETH_ADDR = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant COMPTROLLER_ADDR = 0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B; using SafeERC20 for ERC20; /// @notice User deposits tokens to the Compound protocol /// @dev User needs to approve the DSProxy to pull the _tokenAddr tokens /// @param _tokenAddr The address of the token to be deposited /// @param _cTokenAddr CTokens to be deposited /// @param _amount Amount of tokens to be deposited /// @param _inMarket True if the token is already in market for that address function deposit(address _tokenAddr, address _cTokenAddr, uint _amount, bool _inMarket) public burnGas(5) payable { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(this), _amount); } approveToken(_tokenAddr, _cTokenAddr); if (!_inMarket) { enterMarket(_cTokenAddr); } if (_tokenAddr != ETH_ADDR) { require(CTokenInterface(_cTokenAddr).mint(_amount) == 0); } else { CEtherInterface(_cTokenAddr).mint{value: msg.value}(); // reverts on fail } } /// @notice User withdraws tokens to the Compound protocol /// @param _tokenAddr The address of the token to be withdrawn /// @param _cTokenAddr CTokens to be withdrawn /// @param _amount Amount of tokens to be withdrawn /// @param _isCAmount If true _amount is cTokens if falls _amount is underlying tokens function withdraw(address _tokenAddr, address _cTokenAddr, uint _amount, bool _isCAmount) public burnGas(5) { if (_isCAmount) { require(CTokenInterface(_cTokenAddr).redeem(_amount) == 0); } else { require(CTokenInterface(_cTokenAddr).redeemUnderlying(_amount) == 0); } // withdraw funds to msg.sender if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransfer(msg.sender, ERC20(_tokenAddr).balanceOf(address(this))); } else { msg.sender.transfer(address(this).balance); } } /// @notice User borrows tokens to the Compound protocol /// @param _tokenAddr The address of the token to be borrowed /// @param _cTokenAddr CTokens to be borrowed /// @param _amount Amount of tokens to be borrowed /// @param _inMarket True if the token is already in market for that address function borrow(address _tokenAddr, address _cTokenAddr, uint _amount, bool _inMarket) public burnGas(8) { if (!_inMarket) { enterMarket(_cTokenAddr); } require(CTokenInterface(_cTokenAddr).borrow(_amount) == 0); // withdraw funds to msg.sender if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransfer(msg.sender, ERC20(_tokenAddr).balanceOf(address(this))); } else { msg.sender.transfer(address(this).balance); } } /// @dev User needs to approve the DSProxy to pull the _tokenAddr tokens /// @notice User paybacks tokens to the Compound protocol /// @param _tokenAddr The address of the token to be paybacked /// @param _cTokenAddr CTokens to be paybacked /// @param _amount Amount of tokens to be payedback /// @param _wholeDebt If true the _amount will be set to the whole amount of the debt function payback(address _tokenAddr, address _cTokenAddr, uint _amount, bool _wholeDebt) public burnGas(5) payable { approveToken(_tokenAddr, _cTokenAddr); if (_wholeDebt) { _amount = CTokenInterface(_cTokenAddr).borrowBalanceCurrent(address(this)); } if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(this), _amount); require(CTokenInterface(_cTokenAddr).repayBorrow(_amount) == 0); } else { CEtherInterface(_cTokenAddr).repayBorrow{value: msg.value}(); msg.sender.transfer(address(this).balance); // send back the extra eth } } /// @notice Helper method to withdraw tokens from the DSProxy /// @param _tokenAddr Address of the token to be withdrawn function withdrawTokens(address _tokenAddr) public { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransfer(msg.sender, ERC20(_tokenAddr).balanceOf(address(this))); } else { msg.sender.transfer(address(this).balance); } } /// @notice Enters the Compound market so it can be deposited/borrowed /// @param _cTokenAddr CToken address of the token function enterMarket(address _cTokenAddr) public { address[] memory markets = new address[](1); markets[0] = _cTokenAddr; ComptrollerInterface(COMPTROLLER_ADDR).enterMarkets(markets); } /// @notice Exits the Compound market so it can't be deposited/borrowed /// @param _cTokenAddr CToken address of the token function exitMarket(address _cTokenAddr) public { ComptrollerInterface(COMPTROLLER_ADDR).exitMarket(_cTokenAddr); } /// @notice Approves CToken contract to pull underlying tokens from the DSProxy /// @param _tokenAddr Token we are trying to approve /// @param _cTokenAddr Address which will gain the approval function approveToken(address _tokenAddr, address _cTokenAddr) internal { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeApprove(_cTokenAddr, 0); ERC20(_tokenAddr).safeApprove(_cTokenAddr, uint(-1)); } } } contract CompoundSafetyRatio is Exponential, DSMath { // solhint-disable-next-line const-name-snakecase ComptrollerInterface public constant comp = ComptrollerInterface(0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B); /// @notice Calcualted the ratio of debt / adjusted collateral /// @param _user Address of the user function getSafetyRatio(address _user) public view returns (uint) { // For each asset the account is in address[] memory assets = comp.getAssetsIn(_user); address oracleAddr = comp.oracle(); uint sumCollateral = 0; uint sumBorrow = 0; for (uint i = 0; i < assets.length; i++) { address asset = assets[i]; (, uint cTokenBalance, uint borrowBalance, uint exchangeRateMantissa) = CTokenInterface(asset).getAccountSnapshot(_user); Exp memory oraclePrice; if (cTokenBalance != 0 || borrowBalance != 0) { oraclePrice = Exp({mantissa: CompoundOracleInterface(oracleAddr).getUnderlyingPrice(asset)}); } // Sum up collateral in Usd if (cTokenBalance != 0) { (, uint collFactorMantissa) = comp.markets(address(asset)); Exp memory collateralFactor = Exp({mantissa: collFactorMantissa}); Exp memory exchangeRate = Exp({mantissa: exchangeRateMantissa}); (, Exp memory tokensToUsd) = mulExp3(collateralFactor, exchangeRate, oraclePrice); (, sumCollateral) = mulScalarTruncateAddUInt(tokensToUsd, cTokenBalance, sumCollateral); } // Sum up debt in Usd if (borrowBalance != 0) { (, sumBorrow) = mulScalarTruncateAddUInt(oraclePrice, borrowBalance, sumBorrow); } } if (sumBorrow == 0) return uint(-1); uint borrowPowerUsed = (sumBorrow * 10**18) / sumCollateral; return wdiv(1e18, borrowPowerUsed); } } contract CompoundMonitor is AdminAuth, DSMath, CompoundSafetyRatio, GasBurner { using SafeERC20 for ERC20; enum Method { Boost, Repay } uint public REPAY_GAS_TOKEN = 25; uint public BOOST_GAS_TOKEN = 20; uint constant public MAX_GAS_PRICE = 80000000000; // 80 gwei uint public REPAY_GAS_COST = 2200000; uint public BOOST_GAS_COST = 1700000; address public constant GAS_TOKEN_INTERFACE_ADDRESS = 0x0000000000b3F879cb30FE243b4Dfee438691c04; address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; CompoundMonitorProxy public compoundMonitorProxy; CompoundSubscriptions public subscriptionsContract; address public compoundFlashLoanTakerAddress; DefisaverLogger public logger = DefisaverLogger(DEFISAVER_LOGGER); /// @dev Addresses that are able to call methods for repay and boost mapping(address => bool) public approvedCallers; modifier onlyApproved() { require(approvedCallers[msg.sender]); _; } /// @param _compoundMonitorProxy Proxy contracts that actually is authorized to call DSProxy /// @param _subscriptions Subscriptions contract for Compound positions /// @param _compoundFlashLoanTaker Contract that actually performs Repay/Boost constructor(address _compoundMonitorProxy, address _subscriptions, address _compoundFlashLoanTaker) public { approvedCallers[msg.sender] = true; compoundMonitorProxy = CompoundMonitorProxy(_compoundMonitorProxy); subscriptionsContract = CompoundSubscriptions(_subscriptions); compoundFlashLoanTakerAddress = _compoundFlashLoanTaker; } /// @notice Bots call this method to repay for user when conditions are met /// @dev If the contract ownes gas token it will try and use it for gas price reduction /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress, exchangeAddress] /// @param _user The actual address that owns the Compound position function repayFor( SaverExchangeCore.ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress address _user ) public payable onlyApproved burnGas(REPAY_GAS_TOKEN) { (bool isAllowed, uint ratioBefore) = canCall(Method.Repay, _user); require(isAllowed); // check if conditions are met uint256 gasCost = calcGasCost(REPAY_GAS_COST); compoundMonitorProxy.callExecute{value: msg.value}( _user, compoundFlashLoanTakerAddress, abi.encodeWithSignature( "repayWithLoan((address,address,uint256,uint256,uint256,address,address,bytes,uint256),address[2],uint256)", _exData, _cAddresses, gasCost ) ); (bool isGoodRatio, uint ratioAfter) = ratioGoodAfter(Method.Repay, _user); require(isGoodRatio); // check if the after result of the actions is good returnEth(); logger.Log(address(this), _user, "AutomaticCompoundRepay", abi.encode(ratioBefore, ratioAfter)); } /// @notice Bots call this method to boost for user when conditions are met /// @dev If the contract ownes gas token it will try and use it for gas price reduction /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress, exchangeAddress] /// @param _user The actual address that owns the Compound position function boostFor( SaverExchangeCore.ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress address _user ) public payable onlyApproved burnGas(BOOST_GAS_TOKEN) { (bool isAllowed, uint ratioBefore) = canCall(Method.Boost, _user); require(isAllowed); // check if conditions are met uint256 gasCost = calcGasCost(BOOST_GAS_COST); compoundMonitorProxy.callExecute{value: msg.value}( _user, compoundFlashLoanTakerAddress, abi.encodeWithSignature( "boostWithLoan((address,address,uint256,uint256,uint256,address,address,bytes,uint256),address[2],uint256)", _exData, _cAddresses, gasCost ) ); (bool isGoodRatio, uint ratioAfter) = ratioGoodAfter(Method.Boost, _user); require(isGoodRatio); // check if the after result of the actions is good returnEth(); logger.Log(address(this), _user, "AutomaticCompoundBoost", abi.encode(ratioBefore, ratioAfter)); } /******************* INTERNAL METHODS ********************************/ function returnEth() internal { // return if some eth left if (address(this).balance > 0) { msg.sender.transfer(address(this).balance); } } /******************* STATIC METHODS ********************************/ /// @notice Checks if Boost/Repay could be triggered for the CDP /// @dev Called by MCDMonitor to enforce the min/max check /// @param _method Type of action to be called /// @param _user The actual address that owns the Compound position /// @return Boolean if it can be called and the ratio function canCall(Method _method, address _user) public view returns(bool, uint) { bool subscribed = subscriptionsContract.isSubscribed(_user); CompoundSubscriptions.CompoundHolder memory holder = subscriptionsContract.getHolder(_user); // check if cdp is subscribed if (!subscribed) return (false, 0); // check if boost and boost allowed if (_method == Method.Boost && !holder.boostEnabled) return (false, 0); uint currRatio = getSafetyRatio(_user); if (_method == Method.Repay) { return (currRatio < holder.minRatio, currRatio); } else if (_method == Method.Boost) { return (currRatio > holder.maxRatio, currRatio); } } /// @dev After the Boost/Repay check if the ratio doesn't trigger another call /// @param _method Type of action to be called /// @param _user The actual address that owns the Compound position /// @return Boolean if the recent action preformed correctly and the ratio function ratioGoodAfter(Method _method, address _user) public view returns(bool, uint) { CompoundSubscriptions.CompoundHolder memory holder; holder= subscriptionsContract.getHolder(_user); uint currRatio = getSafetyRatio(_user); if (_method == Method.Repay) { return (currRatio < holder.maxRatio, currRatio); } else if (_method == Method.Boost) { return (currRatio > holder.minRatio, currRatio); } } /// @notice Calculates gas cost (in Eth) of tx /// @dev Gas price is limited to MAX_GAS_PRICE to prevent attack of draining user CDP /// @param _gasAmount Amount of gas used for the tx function calcGasCost(uint _gasAmount) public view returns (uint) { uint gasPrice = tx.gasprice <= MAX_GAS_PRICE ? tx.gasprice : MAX_GAS_PRICE; return mul(gasPrice, _gasAmount); } /******************* OWNER ONLY OPERATIONS ********************************/ /// @notice Allows owner to change gas cost for boost operation, but only up to 3 millions /// @param _gasCost New gas cost for boost method function changeBoostGasCost(uint _gasCost) public onlyOwner { require(_gasCost < 3000000); BOOST_GAS_COST = _gasCost; } /// @notice Allows owner to change gas cost for repay operation, but only up to 3 millions /// @param _gasCost New gas cost for repay method function changeRepayGasCost(uint _gasCost) public onlyOwner { require(_gasCost < 3000000); REPAY_GAS_COST = _gasCost; } /// @notice Adds a new bot address which will be able to call repay/boost /// @param _caller Bot address function addCaller(address _caller) public onlyOwner { approvedCallers[_caller] = true; } /// @notice Removes a bot address so it can't call repay/boost /// @param _caller Bot address function removeCaller(address _caller) public onlyOwner { approvedCallers[_caller] = false; } /// @notice If any tokens gets stuck in the contract owner can withdraw it /// @param _tokenAddress Address of the ERC20 token /// @param _to Address of the receiver /// @param _amount The amount to be sent function transferERC20(address _tokenAddress, address _to, uint _amount) public onlyOwner { ERC20(_tokenAddress).safeTransfer(_to, _amount); } /// @notice If any Eth gets stuck in the contract owner can withdraw it /// @param _to Address of the receiver /// @param _amount The amount to be sent function transferEth(address payable _to, uint _amount) public onlyOwner { _to.transfer(_amount); } } contract CompoundSaverHelper is DSMath, Exponential { using SafeERC20 for ERC20; address payable public constant WALLET_ADDR = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; address public constant DISCOUNT_ADDR = 0x1b14E8D511c9A4395425314f849bD737BAF8208F; uint public constant SERVICE_FEE = 400; // 0.25% Fee address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant CETH_ADDRESS = 0x4Ddc2D193948926D02f9B1fE9e1daa0718270ED5; address public constant COMPTROLLER = 0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B; address public constant COMPOUND_LOGGER = 0x3DD0CDf5fFA28C6847B4B276e2fD256046a44bb7; /// @notice Helper method to payback the Compound debt /// @dev If amount is bigger it will repay the whole debt and send the extra to the _user /// @param _amount Amount of tokens we want to repay /// @param _cBorrowToken Ctoken address we are repaying /// @param _borrowToken Token address we are repaying /// @param _user Owner of the compound position we are paying back function paybackDebt(uint _amount, address _cBorrowToken, address _borrowToken, address payable _user) internal { uint wholeDebt = CTokenInterface(_cBorrowToken).borrowBalanceCurrent(address(this)); if (_amount > wholeDebt) { if (_borrowToken == ETH_ADDRESS) { _user.transfer((_amount - wholeDebt)); } else { ERC20(_borrowToken).safeTransfer(_user, (_amount - wholeDebt)); } _amount = wholeDebt; } approveCToken(_borrowToken, _cBorrowToken); if (_borrowToken == ETH_ADDRESS) { CEtherInterface(_cBorrowToken).repayBorrow{value: _amount}(); } else { require(CTokenInterface(_cBorrowToken).repayBorrow(_amount) == 0); } } /// @notice Calculates the fee amount /// @param _amount Amount that is converted /// @param _user Actuall user addr not DSProxy /// @param _gasCost Ether amount of gas we are spending for tx /// @param _cTokenAddr CToken addr. of token we are getting for the fee /// @return feeAmount The amount we took for the fee function getFee(uint _amount, address _user, uint _gasCost, address _cTokenAddr) internal returns (uint feeAmount) { uint fee = SERVICE_FEE; address tokenAddr = getUnderlyingAddr(_cTokenAddr); if (Discount(DISCOUNT_ADDR).isCustomFeeSet(_user)) { fee = Discount(DISCOUNT_ADDR).getCustomServiceFee(_user); } feeAmount = (fee == 0) ? 0 : (_amount / fee); if (_gasCost != 0) { address oracle = ComptrollerInterface(COMPTROLLER).oracle(); uint usdTokenPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(_cTokenAddr); uint ethPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(CETH_ADDRESS); uint tokenPriceInEth = wdiv(usdTokenPrice, ethPrice); _gasCost = wdiv(_gasCost, tokenPriceInEth); feeAmount = add(feeAmount, _gasCost); } // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } if (tokenAddr == ETH_ADDRESS) { WALLET_ADDR.transfer(feeAmount); } else { ERC20(tokenAddr).safeTransfer(WALLET_ADDR, feeAmount); } } /// @notice Calculates the gas cost of transaction and send it to wallet /// @param _amount Amount that is converted /// @param _gasCost Ether amount of gas we are spending for tx /// @param _cTokenAddr CToken addr. of token we are getting for the fee /// @return feeAmount The amount we took for the fee function getGasCost(uint _amount, uint _gasCost, address _cTokenAddr) internal returns (uint feeAmount) { address tokenAddr = getUnderlyingAddr(_cTokenAddr); if (_gasCost != 0) { address oracle = ComptrollerInterface(COMPTROLLER).oracle(); uint usdTokenPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(_cTokenAddr); uint ethPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(CETH_ADDRESS); uint tokenPriceInEth = wdiv(usdTokenPrice, ethPrice); feeAmount = wdiv(_gasCost, tokenPriceInEth); } // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } if (tokenAddr == ETH_ADDRESS) { WALLET_ADDR.transfer(feeAmount); } else { ERC20(tokenAddr).safeTransfer(WALLET_ADDR, feeAmount); } } /// @notice Enters the market for the collatera and borrow tokens /// @param _cTokenAddrColl Collateral address we are entering the market in /// @param _cTokenAddrBorrow Borrow address we are entering the market in function enterMarket(address _cTokenAddrColl, address _cTokenAddrBorrow) internal { address[] memory markets = new address[](2); markets[0] = _cTokenAddrColl; markets[1] = _cTokenAddrBorrow; ComptrollerInterface(COMPTROLLER).enterMarkets(markets); } /// @notice Approves CToken contract to pull underlying tokens from the DSProxy /// @param _tokenAddr Token we are trying to approve /// @param _cTokenAddr Address which will gain the approval function approveCToken(address _tokenAddr, address _cTokenAddr) internal { if (_tokenAddr != ETH_ADDRESS) { ERC20(_tokenAddr).safeApprove(_cTokenAddr, uint(-1)); } } /// @notice Returns the underlying address of the cToken asset /// @param _cTokenAddress cToken address /// @return Token address of the cToken specified function getUnderlyingAddr(address _cTokenAddress) internal returns (address) { if (_cTokenAddress == CETH_ADDRESS) { return ETH_ADDRESS; } else { return CTokenInterface(_cTokenAddress).underlying(); } } /// @notice Returns the owner of the DSProxy that called the contract function getUserAddress() internal view returns (address) { DSProxy proxy = DSProxy(uint160(address(this))); return proxy.owner(); } /// @notice Returns the maximum amount of collateral available to withdraw /// @dev Due to rounding errors the result is - 1% wei from the exact amount /// @param _cCollAddress Collateral we are getting the max value of /// @param _account Users account /// @return Returns the max. collateral amount in that token function getMaxCollateral(address _cCollAddress, address _account) public returns (uint) { (, uint liquidityInUsd, ) = ComptrollerInterface(COMPTROLLER).getAccountLiquidity(_account); uint usersBalance = CTokenInterface(_cCollAddress).balanceOfUnderlying(_account); address oracle = ComptrollerInterface(COMPTROLLER).oracle(); if (liquidityInUsd == 0) return usersBalance; CTokenInterface(_cCollAddress).accrueInterest(); (, uint collFactorMantissa) = ComptrollerInterface(COMPTROLLER).markets(_cCollAddress); Exp memory collateralFactor = Exp({mantissa: collFactorMantissa}); (, uint tokensToUsd) = divScalarByExpTruncate(liquidityInUsd, collateralFactor); uint usdPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(_cCollAddress); uint liqInToken = wdiv(tokensToUsd, usdPrice); if (liqInToken > usersBalance) return usersBalance; return sub(liqInToken, (liqInToken / 100)); // cut off 1% due to rounding issues } /// @notice Returns the maximum amount of borrow amount available /// @dev Due to rounding errors the result is - 1% wei from the exact amount /// @param _cBorrowAddress Borrow token we are getting the max value of /// @param _account Users account /// @return Returns the max. borrow amount in that token function getMaxBorrow(address _cBorrowAddress, address _account) public returns (uint) { (, uint liquidityInUsd, ) = ComptrollerInterface(COMPTROLLER).getAccountLiquidity(_account); address oracle = ComptrollerInterface(COMPTROLLER).oracle(); CTokenInterface(_cBorrowAddress).accrueInterest(); uint usdPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(_cBorrowAddress); uint liquidityInToken = wdiv(liquidityInUsd, usdPrice); return sub(liquidityInToken, (liquidityInToken / 100)); // cut off 1% due to rounding issues } } contract CompoundImportFlashLoan is FlashLoanReceiverBase { using SafeERC20 for ERC20; ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); address public constant COMPOUND_BORROW_PROXY = 0xb7EDC39bE76107e2Cc645f0f6a3D164f5e173Ee2; address public owner; constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public { owner = msg.sender; } /// @notice Called by Aave when sending back the FL amount /// @param _reserve The address of the borrowed token /// @param _amount Amount of FL tokens received /// @param _fee FL Aave fee /// @param _params The params that are sent from the original FL caller contract function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { ( address cCollateralToken, address cBorrowToken, address user, address proxy ) = abi.decode(_params, (address,address,address,address)); // approve FL tokens so we can repay them ERC20(_reserve).safeApprove(cBorrowToken, uint(-1)); // repay compound debt require(CTokenInterface(cBorrowToken).repayBorrowBehalf(user, uint(-1)) == 0, "Repay borrow behalf fail"); // transfer cTokens to proxy uint cTokenBalance = CTokenInterface(cCollateralToken).balanceOf(user); require(CTokenInterface(cCollateralToken).transferFrom(user, proxy, cTokenBalance)); // borrow bytes memory proxyData = getProxyData(cCollateralToken, cBorrowToken, _reserve, (_amount + _fee)); DSProxyInterface(proxy).execute(COMPOUND_BORROW_PROXY, proxyData); // Repay the loan with the money DSProxy sent back transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); } /// @notice Formats function data call so we can call it through DSProxy /// @param _cCollToken CToken address of collateral /// @param _cBorrowToken CToken address we will borrow /// @param _borrowToken Token address we will borrow /// @param _amount Amount that will be borrowed /// @return proxyData Formated function call data function getProxyData(address _cCollToken, address _cBorrowToken, address _borrowToken, uint _amount) internal pure returns (bytes memory proxyData) { proxyData = abi.encodeWithSignature( "borrow(address,address,address,uint256)", _cCollToken, _cBorrowToken, _borrowToken, _amount); } function withdrawStuckFunds(address _tokenAddr, uint _amount) public { require(owner == msg.sender, "Must be owner"); if (_tokenAddr == 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE) { msg.sender.transfer(_amount); } else { ERC20(_tokenAddr).safeTransfer(owner, _amount); } } } contract CompoundImportTaker is CompoundSaverHelper, ProxyPermission, GasBurner { ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); address payable public constant COMPOUND_IMPORT_FLASH_LOAN = 0x0a9238e14d5A20CDb03811B12D1984587C3CE9a0; address public constant PROXY_REGISTRY_ADDRESS = 0x4678f0a6958e4D2Bc4F1BAF7Bc52E8F3564f3fE4; DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); /// @notice Starts the process to move users position 1 collateral and 1 borrow /// @dev User must approve COMPOUND_IMPORT_FLASH_LOAN to pull _cCollateralToken /// @param _cCollateralToken Collateral we are moving to DSProxy /// @param _cBorrowToken Borrow token we are moving to DSProxy function importLoan(address _cCollateralToken, address _cBorrowToken) external burnGas(20) { address proxy = getProxy(); uint loanAmount = CTokenInterface(_cBorrowToken).borrowBalanceCurrent(msg.sender); bytes memory paramsData = abi.encode(_cCollateralToken, _cBorrowToken, msg.sender, proxy); givePermission(COMPOUND_IMPORT_FLASH_LOAN); lendingPool.flashLoan(COMPOUND_IMPORT_FLASH_LOAN, getUnderlyingAddr(_cBorrowToken), loanAmount, paramsData); removePermission(COMPOUND_IMPORT_FLASH_LOAN); logger.Log(address(this), msg.sender, "CompoundImport", abi.encode(loanAmount, 0, _cCollateralToken)); } /// @notice Gets proxy address, if user doesn't has DSProxy build it /// @return proxy DsProxy address function getProxy() internal returns (address proxy) { proxy = ProxyRegistryInterface(PROXY_REGISTRY_ADDRESS).proxies(msg.sender); if (proxy == address(0)) { proxy = ProxyRegistryInterface(PROXY_REGISTRY_ADDRESS).build(msg.sender); } } } contract SaverExchangeCore is SaverExchangeHelper, DSMath { // first is empty to keep the legacy order in place enum ExchangeType { _, OASIS, KYBER, UNISWAP, ZEROX } enum ActionType { SELL, BUY } struct ExchangeData { address srcAddr; address destAddr; uint srcAmount; uint destAmount; uint minPrice; address wrapper; address exchangeAddr; bytes callData; uint256 price0x; } /// @notice Internal method that preforms a sell on 0x/on-chain /// @dev Usefull for other DFS contract to integrate for exchanging /// @param exData Exchange data struct /// @return (address, uint) Address of the wrapper used and destAmount function _sell(ExchangeData memory exData) internal returns (address, uint) { address wrapper; uint swapedTokens; bool success; uint tokensLeft = exData.srcAmount; // if selling eth, convert to weth if (exData.srcAddr == KYBER_ETH_ADDRESS) { exData.srcAddr = ethToWethAddr(exData.srcAddr); TokenInterface(WETH_ADDRESS).deposit.value(exData.srcAmount)(); } // Try 0x first and then fallback on specific wrapper if (exData.price0x > 0) { approve0xProxy(exData.srcAddr, exData.srcAmount); (success, swapedTokens, tokensLeft) = takeOrder(exData, address(this).balance, ActionType.SELL); if (success) { wrapper = exData.exchangeAddr; } } // fallback to desired wrapper if 0x failed if (!success) { swapedTokens = saverSwap(exData, ActionType.SELL); wrapper = exData.wrapper; } require(getBalance(exData.destAddr) >= wmul(exData.minPrice, exData.srcAmount), "Final amount isn't correct"); // if anything is left in weth, pull it to user as eth if (getBalance(WETH_ADDRESS) > 0) { TokenInterface(WETH_ADDRESS).withdraw( TokenInterface(WETH_ADDRESS).balanceOf(address(this)) ); } return (wrapper, swapedTokens); } /// @notice Internal method that preforms a buy on 0x/on-chain /// @dev Usefull for other DFS contract to integrate for exchanging /// @param exData Exchange data struct /// @return (address, uint) Address of the wrapper used and srcAmount function _buy(ExchangeData memory exData) internal returns (address, uint) { address wrapper; uint swapedTokens; bool success; require(exData.destAmount != 0, "Dest amount must be specified"); // if selling eth, convert to weth if (exData.srcAddr == KYBER_ETH_ADDRESS) { exData.srcAddr = ethToWethAddr(exData.srcAddr); TokenInterface(WETH_ADDRESS).deposit.value(exData.srcAmount)(); } if (exData.price0x > 0) { approve0xProxy(exData.srcAddr, exData.srcAmount); (success, swapedTokens,) = takeOrder(exData, address(this).balance, ActionType.BUY); if (success) { wrapper = exData.exchangeAddr; } } // fallback to desired wrapper if 0x failed if (!success) { swapedTokens = saverSwap(exData, ActionType.BUY); wrapper = exData.wrapper; } require(getBalance(exData.destAddr) >= exData.destAmount, "Final amount isn't correct"); // if anything is left in weth, pull it to user as eth if (getBalance(WETH_ADDRESS) > 0) { TokenInterface(WETH_ADDRESS).withdraw( TokenInterface(WETH_ADDRESS).balanceOf(address(this)) ); } return (wrapper, getBalance(exData.destAddr)); } /// @notice Takes order from 0x and returns bool indicating if it is successful /// @param _exData Exchange data /// @param _ethAmount Ether fee needed for 0x order function takeOrder( ExchangeData memory _exData, uint256 _ethAmount, ActionType _type ) private returns (bool success, uint256, uint256) { // write in the exact amount we are selling/buing in an order if (_type == ActionType.SELL) { writeUint256(_exData.callData, 36, _exData.srcAmount); } else { writeUint256(_exData.callData, 36, _exData.destAmount); } if (ZrxAllowlist(ZRX_ALLOWLIST_ADDR).isZrxAddr(_exData.exchangeAddr)) { (success, ) = _exData.exchangeAddr.call{value: _ethAmount}(_exData.callData); } else { success = false; } uint256 tokensSwaped = 0; uint256 tokensLeft = _exData.srcAmount; if (success) { // check to see if any _src tokens are left over after exchange tokensLeft = getBalance(_exData.srcAddr); // convert weth -> eth if needed if (_exData.destAddr == KYBER_ETH_ADDRESS) { TokenInterface(WETH_ADDRESS).withdraw( TokenInterface(WETH_ADDRESS).balanceOf(address(this)) ); } // get the current balance of the swaped tokens tokensSwaped = getBalance(_exData.destAddr); } return (success, tokensSwaped, tokensLeft); } /// @notice Calls wraper contract for exchage to preform an on-chain swap /// @param _exData Exchange data struct /// @param _type Type of action SELL|BUY /// @return swapedTokens For Sell that the destAmount, for Buy thats the srcAmount function saverSwap(ExchangeData memory _exData, ActionType _type) internal returns (uint swapedTokens) { require(SaverExchangeRegistry(SAVER_EXCHANGE_REGISTRY).isWrapper(_exData.wrapper), "Wrapper is not valid"); uint ethValue = 0; ERC20(_exData.srcAddr).safeTransfer(_exData.wrapper, _exData.srcAmount); if (_type == ActionType.SELL) { swapedTokens = ExchangeInterfaceV2(_exData.wrapper). sell{value: ethValue}(_exData.srcAddr, _exData.destAddr, _exData.srcAmount); } else { swapedTokens = ExchangeInterfaceV2(_exData.wrapper). buy{value: ethValue}(_exData.srcAddr, _exData.destAddr, _exData.destAmount); } } function writeUint256(bytes memory _b, uint256 _index, uint _input) internal pure { if (_b.length < _index + 32) { revert("Incorrent lengt while writting bytes32"); } bytes32 input = bytes32(_input); _index += 32; // Read the bytes32 from array memory assembly { mstore(add(_b, _index), input) } } /// @notice Converts Kybers Eth address -> Weth /// @param _src Input address function ethToWethAddr(address _src) internal pure returns (address) { return _src == KYBER_ETH_ADDRESS ? WETH_ADDRESS : _src; } function packExchangeData(ExchangeData memory _exData) public pure returns(bytes memory) { // splitting in two different bytes and encoding all because of stack too deep in decoding part bytes memory part1 = abi.encode( _exData.srcAddr, _exData.destAddr, _exData.srcAmount, _exData.destAmount ); bytes memory part2 = abi.encode( _exData.minPrice, _exData.wrapper, _exData.exchangeAddr, _exData.callData, _exData.price0x ); return abi.encode(part1, part2); } function unpackExchangeData(bytes memory _data) public pure returns(ExchangeData memory _exData) { ( bytes memory part1, bytes memory part2 ) = abi.decode(_data, (bytes,bytes)); ( _exData.srcAddr, _exData.destAddr, _exData.srcAmount, _exData.destAmount ) = abi.decode(part1, (address,address,uint256,uint256)); ( _exData.minPrice, _exData.wrapper, _exData.exchangeAddr, _exData.callData, _exData.price0x ) = abi.decode(part2, (uint256,address,address,bytes,uint256)); } // solhint-disable-next-line no-empty-blocks receive() external virtual payable {} } contract KyberWrapper is DSMath, ExchangeInterfaceV2 { address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant KYBER_INTERFACE = 0x9AAb3f75489902f3a48495025729a0AF77d4b11e; address payable public constant WALLET_ID = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; using SafeERC20 for ERC20; /// @notice Sells a _srcAmount of tokens at Kyber /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Destination amount function sell(address _srcAddr, address _destAddr, uint _srcAmount) external override payable returns (uint) { ERC20 srcToken = ERC20(_srcAddr); ERC20 destToken = ERC20(_destAddr); KyberNetworkProxyInterface kyberNetworkProxy = KyberNetworkProxyInterface(KYBER_INTERFACE); if (_srcAddr != KYBER_ETH_ADDRESS) { srcToken.safeApprove(address(kyberNetworkProxy), _srcAmount); } uint destAmount = kyberNetworkProxy.trade{value: msg.value}( srcToken, _srcAmount, destToken, msg.sender, uint(-1), 0, WALLET_ID ); return destAmount; } /// @notice Buys a _destAmount of tokens at Kyber /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint srcAmount function buy(address _srcAddr, address _destAddr, uint _destAmount) external override payable returns(uint) { ERC20 srcToken = ERC20(_srcAddr); ERC20 destToken = ERC20(_destAddr); uint srcAmount = 0; if (_srcAddr != KYBER_ETH_ADDRESS) { srcAmount = srcToken.balanceOf(address(this)); } else { srcAmount = msg.value; } KyberNetworkProxyInterface kyberNetworkProxy = KyberNetworkProxyInterface(KYBER_INTERFACE); if (_srcAddr != KYBER_ETH_ADDRESS) { srcToken.safeApprove(address(kyberNetworkProxy), srcAmount); } uint destAmount = kyberNetworkProxy.trade{value: msg.value}( srcToken, srcAmount, destToken, msg.sender, _destAmount, 0, WALLET_ID ); require(destAmount == _destAmount, "Wrong dest amount"); uint srcAmountAfter = 0; if (_srcAddr != KYBER_ETH_ADDRESS) { srcAmountAfter = srcToken.balanceOf(address(this)); } else { srcAmountAfter = address(this).balance; } // Send the leftover from the source token back sendLeftOver(_srcAddr); return (srcAmount - srcAmountAfter); } /// @notice Return a rate for which we can sell an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return rate Rate function getSellRate(address _srcAddr, address _destAddr, uint _srcAmount) public override view returns (uint rate) { (rate, ) = KyberNetworkProxyInterface(KYBER_INTERFACE) .getExpectedRate(ERC20(_srcAddr), ERC20(_destAddr), _srcAmount); // multiply with decimal difference in src token rate = rate * (10**(18 - getDecimals(_srcAddr))); // divide with decimal difference in dest token rate = rate / (10**(18 - getDecimals(_destAddr))); } /// @notice Return a rate for which we can buy an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return rate Rate function getBuyRate(address _srcAddr, address _destAddr, uint _destAmount) public override view returns (uint rate) { uint256 srcRate = getSellRate(_srcAddr, _destAddr, _destAmount); uint256 srcAmount = wmul(_destAmount, srcRate); rate = getSellRate(_destAddr, _srcAddr, srcAmount); // increase rate by 3% too account for inaccuracy between sell/buy conversion rate = rate + (rate / 30); } /// @notice Send any leftover tokens, we use to clear out srcTokens after buy /// @param _srcAddr Source token address function sendLeftOver(address _srcAddr) internal { if (_srcAddr == KYBER_ETH_ADDRESS) { msg.sender.transfer(address(this).balance); } else { ERC20(_srcAddr).safeTransfer(msg.sender, ERC20(_srcAddr).balanceOf(address(this))); } } receive() payable external {} function getDecimals(address _token) internal view returns (uint256) { if (_token == KYBER_ETH_ADDRESS) return 18; return ERC20(_token).decimals(); } } contract OasisTradeWrapper is DSMath, ExchangeInterfaceV2 { using SafeERC20 for ERC20; address public constant OTC_ADDRESS = 0x794e6e91555438aFc3ccF1c5076A74F42133d08D; address public constant WETH_ADDRESS = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; /// @notice Sells a _srcAmount of tokens at Oasis /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Destination amount function sell(address _srcAddr, address _destAddr, uint _srcAmount) external override payable returns (uint) { address srcAddr = ethToWethAddr(_srcAddr); address destAddr = ethToWethAddr(_destAddr); ERC20(srcAddr).safeApprove(OTC_ADDRESS, _srcAmount); uint destAmount = OasisInterface(OTC_ADDRESS).sellAllAmount(srcAddr, _srcAmount, destAddr, 0); // convert weth -> eth and send back if (destAddr == WETH_ADDRESS) { TokenInterface(WETH_ADDRESS).withdraw(destAmount); msg.sender.transfer(destAmount); } else { ERC20(destAddr).safeTransfer(msg.sender, destAmount); } return destAmount; } /// @notice Buys a _destAmount of tokens at Oasis /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint srcAmount function buy(address _srcAddr, address _destAddr, uint _destAmount) external override payable returns(uint) { address srcAddr = ethToWethAddr(_srcAddr); address destAddr = ethToWethAddr(_destAddr); ERC20(srcAddr).safeApprove(OTC_ADDRESS, uint(-1)); uint srcAmount = OasisInterface(OTC_ADDRESS).buyAllAmount(destAddr, _destAmount, srcAddr, uint(-1)); // convert weth -> eth and send back if (destAddr == WETH_ADDRESS) { TokenInterface(WETH_ADDRESS).withdraw(_destAmount); msg.sender.transfer(_destAmount); } else { ERC20(destAddr).safeTransfer(msg.sender, _destAmount); } // Send the leftover from the source token back sendLeftOver(srcAddr); return srcAmount; } /// @notice Return a rate for which we can sell an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Rate function getSellRate(address _srcAddr, address _destAddr, uint _srcAmount) public override view returns (uint) { address srcAddr = ethToWethAddr(_srcAddr); address destAddr = ethToWethAddr(_destAddr); return wdiv(OasisInterface(OTC_ADDRESS).getBuyAmount(destAddr, srcAddr, _srcAmount), _srcAmount); } /// @notice Return a rate for which we can buy an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint Rate function getBuyRate(address _srcAddr, address _destAddr, uint _destAmount) public override view returns (uint) { address srcAddr = ethToWethAddr(_srcAddr); address destAddr = ethToWethAddr(_destAddr); return wdiv(OasisInterface(OTC_ADDRESS).getPayAmount(srcAddr, destAddr, _destAmount), _destAmount); } /// @notice Send any leftover tokens, we use to clear out srcTokens after buy /// @param _srcAddr Source token address function sendLeftOver(address _srcAddr) internal { address srcAddr = ethToWethAddr(_srcAddr); if (srcAddr == WETH_ADDRESS) { msg.sender.transfer(address(this).balance); } else { ERC20(srcAddr).safeTransfer(msg.sender, ERC20(srcAddr).balanceOf(address(this))); } } /// @notice Converts Kybers Eth address -> Weth /// @param _src Input address function ethToWethAddr(address _src) internal pure returns (address) { return _src == KYBER_ETH_ADDRESS ? WETH_ADDRESS : _src; } receive() payable external {} } contract UniswapWrapper is DSMath, ExchangeInterfaceV2 { address public constant WETH_ADDRESS = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant UNISWAP_FACTORY = 0xc0a47dFe034B400B47bDaD5FecDa2621de6c4d95; using SafeERC20 for ERC20; /// @notice Sells a _srcAmount of tokens at Uniswap /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Destination amount function sell(address _srcAddr, address _destAddr, uint _srcAmount) external payable override returns (uint) { address uniswapExchangeAddr; uint destAmount; _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); // if we are buying ether if (_destAddr == WETH_ADDRESS) { uniswapExchangeAddr = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr); ERC20(_srcAddr).safeApprove(uniswapExchangeAddr, _srcAmount); destAmount = UniswapExchangeInterface(uniswapExchangeAddr). tokenToEthTransferInput(_srcAmount, 1, block.timestamp + 1, msg.sender); } // if we are selling token to token else { uniswapExchangeAddr = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr); ERC20(_srcAddr).safeApprove(uniswapExchangeAddr, _srcAmount); destAmount = UniswapExchangeInterface(uniswapExchangeAddr). tokenToTokenTransferInput(_srcAmount, 1, 1, block.timestamp + 1, msg.sender, _destAddr); } return destAmount; } /// @notice Buys a _destAmount of tokens at Uniswap /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint srcAmount function buy(address _srcAddr, address _destAddr, uint _destAmount) external override payable returns(uint) { address uniswapExchangeAddr; uint srcAmount; _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); // if we are buying ether if (_destAddr == WETH_ADDRESS) { uniswapExchangeAddr = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr); ERC20(_srcAddr).safeApprove(uniswapExchangeAddr, uint(-1)); srcAmount = UniswapExchangeInterface(uniswapExchangeAddr). tokenToEthTransferOutput(_destAmount, uint(-1), block.timestamp + 1, msg.sender); } // if we are buying token to token else { uniswapExchangeAddr = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr); ERC20(_srcAddr).safeApprove(uniswapExchangeAddr, uint(-1)); srcAmount = UniswapExchangeInterface(uniswapExchangeAddr). tokenToTokenTransferOutput(_destAmount, uint(-1), uint(-1), block.timestamp + 1, msg.sender, _destAddr); } // Send the leftover from the source token back sendLeftOver(_srcAddr); return srcAmount; } /// @notice Return a rate for which we can sell an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Rate function getSellRate(address _srcAddr, address _destAddr, uint _srcAmount) public override view returns (uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); if(_srcAddr == WETH_ADDRESS) { address uniswapTokenAddress = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_destAddr); return wdiv(UniswapExchangeInterface(uniswapTokenAddress).getEthToTokenInputPrice(_srcAmount), _srcAmount); } else if (_destAddr == WETH_ADDRESS) { address uniswapTokenAddress = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr); return wdiv(UniswapExchangeInterface(uniswapTokenAddress).getTokenToEthInputPrice(_srcAmount), _srcAmount); } else { uint ethBought = UniswapExchangeInterface(UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr)).getTokenToEthInputPrice(_srcAmount); return wdiv(UniswapExchangeInterface(UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_destAddr)).getEthToTokenInputPrice(ethBought), _srcAmount); } } /// @notice Return a rate for which we can buy an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint Rate function getBuyRate(address _srcAddr, address _destAddr, uint _destAmount) public override view returns (uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); if(_srcAddr == WETH_ADDRESS) { address uniswapTokenAddress = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_destAddr); return wdiv(UniswapExchangeInterface(uniswapTokenAddress).getEthToTokenOutputPrice(_destAmount), _destAmount); } else if (_destAddr == WETH_ADDRESS) { address uniswapTokenAddress = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr); return wdiv(UniswapExchangeInterface(uniswapTokenAddress).getTokenToEthOutputPrice(_destAmount), _destAmount); } else { uint ethNeeded = UniswapExchangeInterface(UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_destAddr)).getTokenToEthOutputPrice(_destAmount); return wdiv(UniswapExchangeInterface(UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr)).getEthToTokenOutputPrice(ethNeeded), _destAmount); } } /// @notice Send any leftover tokens, we use to clear out srcTokens after buy /// @param _srcAddr Source token address function sendLeftOver(address _srcAddr) internal { if (_srcAddr == WETH_ADDRESS) { msg.sender.transfer(address(this).balance); } else { ERC20(_srcAddr).safeTransfer(msg.sender, ERC20(_srcAddr).balanceOf(address(this))); } } /// @notice Converts Kybers Eth address -> Weth /// @param _src Input address function ethToWethAddr(address _src) internal pure returns (address) { return _src == KYBER_ETH_ADDRESS ? WETH_ADDRESS : _src; } receive() payable external {} } contract DyDxFlashLoanTaker is DydxFlashLoanBase, ProxyPermission { address public constant WETH_ADDR = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; /// @notice Takes flash loan for _receiver /// @dev Receiver must send back WETH + 2 wei after executing transaction /// @dev Method is meant to be called from proxy and proxy will give authorization to _receiver /// @param _receiver Address of funds receiver /// @param _ethAmount ETH amount that needs to be pulled from dydx /// @param _encodedData Bytes with packed data function takeLoan(address _receiver, uint256 _ethAmount, bytes memory _encodedData) public { ISoloMargin solo = ISoloMargin(SOLO_MARGIN_ADDRESS); // Get marketId from token address uint256 marketId = _getMarketIdFromTokenAddress(WETH_ADDR); // Calculate repay amount (_amount + (2 wei)) // Approve transfer from uint256 repayAmount = _getRepaymentAmountInternal(_ethAmount); ERC20(WETH_ADDR).approve(SOLO_MARGIN_ADDRESS, repayAmount); Actions.ActionArgs[] memory operations = new Actions.ActionArgs[](3); operations[0] = _getWithdrawAction(marketId, _ethAmount, _receiver); operations[1] = _getCallAction( _encodedData, _receiver ); operations[2] = _getDepositAction(marketId, repayAmount, address(this)); Account.Info[] memory accountInfos = new Account.Info[](1); accountInfos[0] = _getAccountInfo(); givePermission(_receiver); solo.operate(accountInfos, operations); removePermission(_receiver); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "DyDxFlashLoanTaken", abi.encode(_receiver, _ethAmount, _encodedData)); } } abstract contract CTokenInterface is ERC20 { function mint(uint256 mintAmount) external virtual returns (uint256); // function mint() external virtual payable; function accrueInterest() public virtual returns (uint); function redeem(uint256 redeemTokens) external virtual returns (uint256); function redeemUnderlying(uint256 redeemAmount) external virtual returns (uint256); function borrow(uint256 borrowAmount) external virtual returns (uint256); function repayBorrow(uint256 repayAmount) external virtual returns (uint256); function repayBorrow() external virtual payable; function repayBorrowBehalf(address borrower, uint256 repayAmount) external virtual returns (uint256); function repayBorrowBehalf(address borrower) external virtual payable; function liquidateBorrow(address borrower, uint256 repayAmount, address cTokenCollateral) external virtual returns (uint256); function liquidateBorrow(address borrower, address cTokenCollateral) external virtual payable; function exchangeRateCurrent() external virtual returns (uint256); function supplyRatePerBlock() external virtual returns (uint256); function borrowRatePerBlock() external virtual returns (uint256); function totalReserves() external virtual returns (uint256); function reserveFactorMantissa() external virtual returns (uint256); function borrowBalanceCurrent(address account) external virtual returns (uint256); function totalBorrowsCurrent() external virtual returns (uint256); function getCash() external virtual returns (uint256); function balanceOfUnderlying(address owner) external virtual returns (uint256); function underlying() external virtual returns (address); function getAccountSnapshot(address account) external virtual view returns (uint, uint, uint, uint); } abstract contract ISubscriptionsV2 is StaticV2 { function getOwner(uint _cdpId) external view virtual returns(address); function getSubscribedInfo(uint _cdpId) public view virtual returns(bool, uint128, uint128, uint128, uint128, address, uint coll, uint debt); function getCdpHolder(uint _cdpId) public view virtual returns (bool subscribed, CdpHolder memory); } contract MCDMonitorV2 is DSMath, AdminAuth, GasBurner, StaticV2 { uint public REPAY_GAS_TOKEN = 25; uint public BOOST_GAS_TOKEN = 25; uint public MAX_GAS_PRICE = 200000000000; // 200 gwei uint public REPAY_GAS_COST = 2500000; uint public BOOST_GAS_COST = 2500000; MCDMonitorProxyV2 public monitorProxyContract; ISubscriptionsV2 public subscriptionsContract; address public mcdSaverTakerAddress; Manager public manager = Manager(0x5ef30b9986345249bc32d8928B7ee64DE9435E39); Vat public vat = Vat(0x35D1b3F3D7966A1DFe207aa4514C12a259A0492B); Spotter public spotter = Spotter(0x65C79fcB50Ca1594B025960e539eD7A9a6D434A3); DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); /// @dev Addresses that are able to call methods for repay and boost mapping(address => bool) public approvedCallers; modifier onlyApproved() { require(approvedCallers[msg.sender]); _; } constructor(address _monitorProxy, address _subscriptions, address _mcdSaverTakerAddress) public { approvedCallers[msg.sender] = true; monitorProxyContract = MCDMonitorProxyV2(_monitorProxy); subscriptionsContract = ISubscriptionsV2(_subscriptions); mcdSaverTakerAddress = _mcdSaverTakerAddress; } /// @notice Bots call this method to repay for user when conditions are met /// @dev If the contract ownes gas token it will try and use it for gas price reduction function repayFor( uint _cdpId, uint _nextPrice, address _joinAddr, SaverExchangeCore.ExchangeData memory _exchangeData ) public payable onlyApproved burnGas(REPAY_GAS_TOKEN) { (bool isAllowed, uint ratioBefore) = canCall(Method.Repay, _cdpId, _nextPrice); require(isAllowed); uint gasCost = calcGasCost(REPAY_GAS_COST); address owner = subscriptionsContract.getOwner(_cdpId); monitorProxyContract.callExecute{value: msg.value}( owner, mcdSaverTakerAddress, abi.encodeWithSignature( "repayWithLoan(uint256,uint256,address,(address,address,uint256,uint256,uint256,address,address,bytes,uint256))", _cdpId, gasCost, _joinAddr, _exchangeData)); (bool isGoodRatio, uint ratioAfter) = ratioGoodAfter(Method.Repay, _cdpId, _nextPrice); require(isGoodRatio); returnEth(); logger.Log(address(this), owner, "AutomaticMCDRepay", abi.encode(ratioBefore, ratioAfter)); } /// @notice Bots call this method to boost for user when conditions are met /// @dev If the contract ownes gas token it will try and use it for gas price reduction function boostFor( uint _cdpId, uint _nextPrice, address _joinAddr, SaverExchangeCore.ExchangeData memory _exchangeData ) public payable onlyApproved burnGas(BOOST_GAS_TOKEN) { (bool isAllowed, uint ratioBefore) = canCall(Method.Boost, _cdpId, _nextPrice); require(isAllowed); uint gasCost = calcGasCost(BOOST_GAS_COST); address owner = subscriptionsContract.getOwner(_cdpId); monitorProxyContract.callExecute{value: msg.value}( owner, mcdSaverTakerAddress, abi.encodeWithSignature( "boostWithLoan(uint256,uint256,address,(address,address,uint256,uint256,uint256,address,address,bytes,uint256))", _cdpId, gasCost, _joinAddr, _exchangeData)); (bool isGoodRatio, uint ratioAfter) = ratioGoodAfter(Method.Boost, _cdpId, _nextPrice); require(isGoodRatio); returnEth(); logger.Log(address(this), owner, "AutomaticMCDBoost", abi.encode(ratioBefore, ratioAfter)); } /******************* INTERNAL METHODS ********************************/ function returnEth() internal { // return if some eth left if (address(this).balance > 0) { msg.sender.transfer(address(this).balance); } } /******************* STATIC METHODS ********************************/ /// @notice Returns an address that owns the CDP /// @param _cdpId Id of the CDP function getOwner(uint _cdpId) public view returns(address) { return manager.owns(_cdpId); } /// @notice Gets CDP info (collateral, debt) /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP function getCdpInfo(uint _cdpId, bytes32 _ilk) public view returns (uint, uint) { address urn = manager.urns(_cdpId); (uint collateral, uint debt) = vat.urns(_ilk, urn); (,uint rate,,,) = vat.ilks(_ilk); return (collateral, rmul(debt, rate)); } /// @notice Gets a price of the asset /// @param _ilk Ilk of the CDP function getPrice(bytes32 _ilk) public view returns (uint) { (, uint mat) = spotter.ilks(_ilk); (,,uint spot,,) = vat.ilks(_ilk); return rmul(rmul(spot, spotter.par()), mat); } /// @notice Gets CDP ratio /// @param _cdpId Id of the CDP /// @param _nextPrice Next price for user function getRatio(uint _cdpId, uint _nextPrice) public view returns (uint) { bytes32 ilk = manager.ilks(_cdpId); uint price = (_nextPrice == 0) ? getPrice(ilk) : _nextPrice; (uint collateral, uint debt) = getCdpInfo(_cdpId, ilk); if (debt == 0) return 0; return rdiv(wmul(collateral, price), debt) / (10 ** 18); } /// @notice Checks if Boost/Repay could be triggered for the CDP /// @dev Called by MCDMonitor to enforce the min/max check function canCall(Method _method, uint _cdpId, uint _nextPrice) public view returns(bool, uint) { bool subscribed; CdpHolder memory holder; (subscribed, holder) = subscriptionsContract.getCdpHolder(_cdpId); // check if cdp is subscribed if (!subscribed) return (false, 0); // check if using next price is allowed if (_nextPrice > 0 && !holder.nextPriceEnabled) return (false, 0); // check if boost and boost allowed if (_method == Method.Boost && !holder.boostEnabled) return (false, 0); // check if owner is still owner if (getOwner(_cdpId) != holder.owner) return (false, 0); uint currRatio = getRatio(_cdpId, _nextPrice); if (_method == Method.Repay) { return (currRatio < holder.minRatio, currRatio); } else if (_method == Method.Boost) { return (currRatio > holder.maxRatio, currRatio); } } /// @dev After the Boost/Repay check if the ratio doesn't trigger another call function ratioGoodAfter(Method _method, uint _cdpId, uint _nextPrice) public view returns(bool, uint) { CdpHolder memory holder; (, holder) = subscriptionsContract.getCdpHolder(_cdpId); uint currRatio = getRatio(_cdpId, _nextPrice); if (_method == Method.Repay) { return (currRatio < holder.maxRatio, currRatio); } else if (_method == Method.Boost) { return (currRatio > holder.minRatio, currRatio); } } /// @notice Calculates gas cost (in Eth) of tx /// @dev Gas price is limited to MAX_GAS_PRICE to prevent attack of draining user CDP /// @param _gasAmount Amount of gas used for the tx function calcGasCost(uint _gasAmount) public view returns (uint) { uint gasPrice = tx.gasprice <= MAX_GAS_PRICE ? tx.gasprice : MAX_GAS_PRICE; return mul(gasPrice, _gasAmount); } /******************* OWNER ONLY OPERATIONS ********************************/ /// @notice Allows owner to change gas cost for boost operation, but only up to 3 millions /// @param _gasCost New gas cost for boost method function changeBoostGasCost(uint _gasCost) public onlyOwner { require(_gasCost < 3000000); BOOST_GAS_COST = _gasCost; } /// @notice Allows owner to change gas cost for repay operation, but only up to 3 millions /// @param _gasCost New gas cost for repay method function changeRepayGasCost(uint _gasCost) public onlyOwner { require(_gasCost < 3000000); REPAY_GAS_COST = _gasCost; } /// @notice Allows owner to change max gas price /// @param _maxGasPrice New max gas price function changeMaxGasPrice(uint _maxGasPrice) public onlyOwner { require(_maxGasPrice < 500000000000); MAX_GAS_PRICE = _maxGasPrice; } /// @notice Allows owner to change the amount of gas token burned per function call /// @param _gasAmount Amount of gas token /// @param _isRepay Flag to know for which function we are setting the gas token amount function changeGasTokenAmount(uint _gasAmount, bool _isRepay) public onlyOwner { if (_isRepay) { REPAY_GAS_TOKEN = _gasAmount; } else { BOOST_GAS_TOKEN = _gasAmount; } } /// @notice Adds a new bot address which will be able to call repay/boost /// @param _caller Bot address function addCaller(address _caller) public onlyOwner { approvedCallers[_caller] = true; } /// @notice Removes a bot address so it can't call repay/boost /// @param _caller Bot address function removeCaller(address _caller) public onlyOwner { approvedCallers[_caller] = false; } } contract MCDCloseFlashLoan is SaverExchangeCore, MCDSaverProxyHelper, FlashLoanReceiverBase, AdminAuth { ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); uint public constant SERVICE_FEE = 400; // 0.25% Fee bytes32 internal constant ETH_ILK = 0x4554482d41000000000000000000000000000000000000000000000000000000; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; address public constant DAI_JOIN_ADDRESS = 0x9759A6Ac90977b93B58547b4A71c78317f391A28; address public constant ETH_JOIN_ADDRESS = 0x2F0b23f53734252Bda2277357e97e1517d6B042A; address public constant SPOTTER_ADDRESS = 0x65C79fcB50Ca1594B025960e539eD7A9a6D434A3; address public constant VAT_ADDRESS = 0x35D1b3F3D7966A1DFe207aa4514C12a259A0492B; Manager public constant manager = Manager(0x5ef30b9986345249bc32d8928B7ee64DE9435E39); DaiJoin public constant daiJoin = DaiJoin(DAI_JOIN_ADDRESS); Spotter public constant spotter = Spotter(SPOTTER_ADDRESS); Vat public constant vat = Vat(VAT_ADDRESS); struct CloseData { uint cdpId; uint collAmount; uint daiAmount; uint minAccepted; address joinAddr; address proxy; uint flFee; bool toDai; } constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public {} function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { //check the contract has the specified balance require(_amount <= getBalanceInternal(address(this), _reserve), "Invalid balance for the contract"); ( uint[8] memory numData, address[5] memory addrData, bytes memory callData, address proxy, bool toDai ) = abi.decode(_params, (uint256[8],address[5],bytes,address,bool)); ExchangeData memory exchangeData = ExchangeData({ srcAddr: addrData[0], destAddr: addrData[1], srcAmount: numData[4], destAmount: numData[5], minPrice: numData[6], wrapper: addrData[3], exchangeAddr: addrData[2], callData: callData, price0x: numData[7] }); CloseData memory closeData = CloseData({ cdpId: numData[0], collAmount: numData[1], daiAmount: numData[2], minAccepted: numData[3], joinAddr: addrData[4], proxy: proxy, flFee: _fee, toDai: toDai }); address collAddr = closeCDP(closeData, exchangeData); transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); sendLeftover(collAddr, DAI_ADDRESS, tx.origin); } function closeCDP( CloseData memory _closeData, ExchangeData memory _exchangeData ) internal returns (address) { paybackDebt(_closeData.cdpId, manager.ilks(_closeData.cdpId), _closeData.daiAmount); // payback whole debt drawMaxCollateral(_closeData.cdpId, _closeData.joinAddr, _closeData.collAmount); // draw whole collateral uint daiSwaped = 0; uint dfsFee = 0; address user = DSProxy(payable(_closeData.proxy)).owner(); if (_closeData.toDai) { _exchangeData.srcAmount = _closeData.collAmount; (, daiSwaped) = _sell(_exchangeData); dfsFee = getFee(daiSwaped, user); } else { dfsFee = getFee(_closeData.daiAmount, user); _exchangeData.destAmount = (_closeData.daiAmount + _closeData.flFee + dfsFee); (, daiSwaped) = _buy(_exchangeData); } takeFee(dfsFee); address tokenAddr = address(Join(_closeData.joinAddr).gem()); require(getBalance(tokenAddr) >= _closeData.minAccepted, "Below min. number of eth specified"); return tokenAddr; } function drawMaxCollateral(uint _cdpId, address _joinAddr, uint _amount) internal returns (uint) { manager.frob(_cdpId, -toPositiveInt(_amount), 0); manager.flux(_cdpId, address(this), _amount); uint joinAmount = _amount; if (Join(_joinAddr).dec() != 18) { joinAmount = _amount / (10 ** (18 - Join(_joinAddr).dec())); } Join(_joinAddr).exit(address(this), joinAmount); if (_joinAddr == ETH_JOIN_ADDRESS) { Join(_joinAddr).gem().withdraw(joinAmount); // Weth -> Eth } return joinAmount; } function paybackDebt(uint _cdpId, bytes32 _ilk, uint _daiAmount) internal { address urn = manager.urns(_cdpId); daiJoin.dai().approve(DAI_JOIN_ADDRESS, _daiAmount); daiJoin.join(urn, _daiAmount); manager.frob(_cdpId, 0, normalizePaybackAmount(VAT_ADDRESS, urn, _ilk)); } function takeFee(uint _feeAmount) internal returns (uint) { ERC20(DAI_ADDRESS).transfer(WALLET_ID, _feeAmount); } function getFee(uint _amount, address _owner) internal view returns (uint feeAmount) { uint fee = SERVICE_FEE; if (Discount(DISCOUNT_ADDRESS).isCustomFeeSet(_owner)) { fee = Discount(DISCOUNT_ADDRESS).getCustomServiceFee(_owner); } feeAmount = (fee == 0) ? 0 : (_amount / fee); // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } } function getPrice(bytes32 _ilk) public view returns (uint256) { (, uint256 mat) = spotter.ilks(_ilk); (, , uint256 spot, , ) = vat.ilks(_ilk); return rmul(rmul(spot, spotter.par()), mat); } receive() external override(FlashLoanReceiverBase, SaverExchangeCore) payable {} } contract MCDCloseTaker is MCDSaverProxyHelper { address payable public constant MCD_CLOSE_FLASH_LOAN = 0xdFccc9C59c7361307d47c558ffA75840B32DbA29; address public constant SUBSCRIPTION_ADDRESS_NEW = 0xC45d4f6B6bf41b6EdAA58B01c4298B8d9078269a; address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); // solhint-disable-next-line const-name-snakecase Manager public constant manager = Manager(0x5ef30b9986345249bc32d8928B7ee64DE9435E39); address public constant SPOTTER_ADDRESS = 0x65C79fcB50Ca1594B025960e539eD7A9a6D434A3; address public constant VAT_ADDRESS = 0x35D1b3F3D7966A1DFe207aa4514C12a259A0492B; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; // solhint-disable-next-line const-name-snakecase DefisaverLogger public constant logger = DefisaverLogger(DEFISAVER_LOGGER); struct CloseData { uint cdpId; address joinAddr; uint collAmount; uint daiAmount; uint minAccepted; bool wholeDebt; bool toDai; } Vat public constant vat = Vat(VAT_ADDRESS); Spotter public constant spotter = Spotter(SPOTTER_ADDRESS); function closeWithLoan( SaverExchangeCore.ExchangeData memory _exchangeData, CloseData memory _closeData ) public payable { MCD_CLOSE_FLASH_LOAN.transfer(msg.value); // 0x fee if (_closeData.wholeDebt) { _closeData.daiAmount = getAllDebt( VAT_ADDRESS, manager.urns(_closeData.cdpId), manager.urns(_closeData.cdpId), manager.ilks(_closeData.cdpId) ); (_closeData.collAmount, ) = getCdpInfo(manager, _closeData.cdpId, manager.ilks(_closeData.cdpId)); } manager.cdpAllow(_closeData.cdpId, MCD_CLOSE_FLASH_LOAN, 1); (uint[8] memory numData, address[5] memory addrData, bytes memory callData) = _packData(_closeData, _exchangeData); bytes memory paramsData = abi.encode(numData, addrData, callData, address(this), _closeData.toDai); lendingPool.flashLoan(MCD_CLOSE_FLASH_LOAN, DAI_ADDRESS, _closeData.daiAmount, paramsData); manager.cdpAllow(_closeData.cdpId, MCD_CLOSE_FLASH_LOAN, 0); // If sub. to automatic protection unsubscribe unsubscribe(SUBSCRIPTION_ADDRESS_NEW, _closeData.cdpId); logger.Log(address(this), msg.sender, "MCDClose", abi.encode(_closeData.cdpId, _closeData.collAmount, _closeData.daiAmount, _closeData.toDai)); } /// @notice Gets the maximum amount of debt available to generate /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP function getMaxDebt(uint256 _cdpId, bytes32 _ilk) public view returns (uint256) { uint256 price = getPrice(_ilk); (, uint256 mat) = spotter.ilks(_ilk); (uint256 collateral, uint256 debt) = getCdpInfo(manager, _cdpId, _ilk); return sub(wdiv(wmul(collateral, price), mat), debt); } /// @notice Gets a price of the asset /// @param _ilk Ilk of the CDP function getPrice(bytes32 _ilk) public view returns (uint256) { (, uint256 mat) = spotter.ilks(_ilk); (, , uint256 spot, , ) = vat.ilks(_ilk); return rmul(rmul(spot, spotter.par()), mat); } function unsubscribe(address _subContract, uint _cdpId) internal { (, bool isSubscribed) = IMCDSubscriptions(_subContract).subscribersPos(_cdpId); if (isSubscribed) { IMCDSubscriptions(_subContract).unsubscribe(_cdpId); } } function _packData( CloseData memory _closeData, SaverExchangeCore.ExchangeData memory exchangeData ) internal pure returns (uint[8] memory numData, address[5] memory addrData, bytes memory callData) { numData = [ _closeData.cdpId, _closeData.collAmount, _closeData.daiAmount, _closeData.minAccepted, exchangeData.srcAmount, exchangeData.destAmount, exchangeData.minPrice, exchangeData.price0x ]; addrData = [ exchangeData.srcAddr, exchangeData.destAddr, exchangeData.exchangeAddr, exchangeData.wrapper, _closeData.joinAddr ]; callData = exchangeData.callData; } } contract MCDCreateFlashLoan is SaverExchangeCore, AdminAuth, FlashLoanReceiverBase { address public constant CREATE_PROXY_ACTIONS = 0x6d0984E80a86f26c0dd564ca0CF74a8E9Da03305; uint public constant SERVICE_FEE = 400; // 0.25% Fee address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); address public constant ETH_JOIN_ADDRESS = 0x2F0b23f53734252Bda2277357e97e1517d6B042A; address public constant DAI_JOIN_ADDRESS = 0x9759A6Ac90977b93B58547b4A71c78317f391A28; address public constant JUG_ADDRESS = 0x19c0976f590D67707E62397C87829d896Dc0f1F1; address public constant MANAGER_ADDRESS = 0x5ef30b9986345249bc32d8928B7ee64DE9435E39; constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public {} function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { //check the contract has the specified balance require(_amount <= getBalanceInternal(address(this), _reserve), "Invalid balance for the contract"); ( uint[6] memory numData, address[5] memory addrData, bytes memory callData, address proxy ) = abi.decode(_params, (uint256[6],address[5],bytes,address)); ExchangeData memory exchangeData = ExchangeData({ srcAddr: addrData[0], destAddr: addrData[1], srcAmount: numData[2], destAmount: numData[3], minPrice: numData[4], wrapper: addrData[3], exchangeAddr: addrData[2], callData: callData, price0x: numData[5] }); openAndLeverage(numData[0], numData[1] + _fee, addrData[4], proxy, exchangeData); transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } } function openAndLeverage( uint _collAmount, uint _daiAmountAndFee, address _joinAddr, address _proxy, ExchangeData memory _exchangeData ) public { uint dfsFee = getFee(_exchangeData.srcAmount, DSProxy(payable(_proxy)).owner()); _exchangeData.srcAmount = (_exchangeData.srcAmount - dfsFee); (, uint256 collSwaped) = _sell(_exchangeData); bytes32 ilk = Join(_joinAddr).ilk(); if (_joinAddr == ETH_JOIN_ADDRESS) { MCDCreateProxyActions(CREATE_PROXY_ACTIONS).openLockETHAndDraw{value: address(this).balance}( MANAGER_ADDRESS, JUG_ADDRESS, ETH_JOIN_ADDRESS, DAI_JOIN_ADDRESS, ilk, _daiAmountAndFee, _proxy ); } else { Join(_joinAddr).gem().approve(CREATE_PROXY_ACTIONS, uint256(-1)); MCDCreateProxyActions(CREATE_PROXY_ACTIONS).openLockGemAndDraw( MANAGER_ADDRESS, JUG_ADDRESS, _joinAddr, DAI_JOIN_ADDRESS, ilk, (_collAmount + collSwaped), _daiAmountAndFee, true, _proxy ); } } function getFee(uint _amount, address _owner) internal returns (uint feeAmount) { uint fee = SERVICE_FEE; if (Discount(DISCOUNT_ADDRESS).isCustomFeeSet(_owner)) { fee = Discount(DISCOUNT_ADDRESS).getCustomServiceFee(_owner); } feeAmount = (fee == 0) ? 0 : (_amount / fee); // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } ERC20(DAI_ADDRESS).transfer(WALLET_ID, feeAmount); } receive() external override(FlashLoanReceiverBase, SaverExchangeCore) payable {} } contract MCDSaverProxy is SaverExchangeCore, MCDSaverProxyHelper { uint public constant SERVICE_FEE = 400; // 0.25% Fee bytes32 public constant ETH_ILK = 0x4554482d41000000000000000000000000000000000000000000000000000000; address public constant MANAGER_ADDRESS = 0x5ef30b9986345249bc32d8928B7ee64DE9435E39; address public constant VAT_ADDRESS = 0x35D1b3F3D7966A1DFe207aa4514C12a259A0492B; address public constant SPOTTER_ADDRESS = 0x65C79fcB50Ca1594B025960e539eD7A9a6D434A3; address public constant DAI_JOIN_ADDRESS = 0x9759A6Ac90977b93B58547b4A71c78317f391A28; address public constant JUG_ADDRESS = 0x19c0976f590D67707E62397C87829d896Dc0f1F1; address public constant ETH_JOIN_ADDRESS = 0x2F0b23f53734252Bda2277357e97e1517d6B042A; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; Manager public constant manager = Manager(MANAGER_ADDRESS); Vat public constant vat = Vat(VAT_ADDRESS); DaiJoin public constant daiJoin = DaiJoin(DAI_JOIN_ADDRESS); Spotter public constant spotter = Spotter(SPOTTER_ADDRESS); DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); /// @notice Repay - draws collateral, converts to Dai and repays the debt /// @dev Must be called by the DSProxy contract that owns the CDP function repay( SaverExchangeCore.ExchangeData memory _exchangeData, uint _cdpId, uint _gasCost, address _joinAddr ) public payable { address owner = getOwner(manager, _cdpId); bytes32 ilk = manager.ilks(_cdpId); drawCollateral(_cdpId, _joinAddr, _exchangeData.srcAmount); (, uint daiAmount) = _sell(_exchangeData); uint daiAfterFee = sub(daiAmount, getFee(daiAmount, _gasCost, owner)); paybackDebt(_cdpId, ilk, daiAfterFee, owner); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } logger.Log(address(this), msg.sender, "MCDRepay", abi.encode(_cdpId, owner, _exchangeData.srcAmount, daiAmount)); } /// @notice Boost - draws Dai, converts to collateral and adds to CDP /// @dev Must be called by the DSProxy contract that owns the CDP function boost( SaverExchangeCore.ExchangeData memory _exchangeData, uint _cdpId, uint _gasCost, address _joinAddr ) public payable { address owner = getOwner(manager, _cdpId); bytes32 ilk = manager.ilks(_cdpId); uint daiDrawn = drawDai(_cdpId, ilk, _exchangeData.srcAmount); uint daiAfterFee = sub(daiDrawn, getFee(daiDrawn, _gasCost, owner)); _exchangeData.srcAmount = daiAfterFee; (, uint swapedColl) = _sell(_exchangeData); addCollateral(_cdpId, _joinAddr, swapedColl); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } logger.Log(address(this), msg.sender, "MCDBoost", abi.encode(_cdpId, owner, _exchangeData.srcAmount, swapedColl)); } /// @notice Draws Dai from the CDP /// @dev If _daiAmount is bigger than max available we'll draw max /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP /// @param _daiAmount Amount of Dai to draw function drawDai(uint _cdpId, bytes32 _ilk, uint _daiAmount) internal returns (uint) { uint rate = Jug(JUG_ADDRESS).drip(_ilk); uint daiVatBalance = vat.dai(manager.urns(_cdpId)); uint maxAmount = getMaxDebt(_cdpId, _ilk); if (_daiAmount >= maxAmount) { _daiAmount = sub(maxAmount, 1); } manager.frob(_cdpId, int(0), normalizeDrawAmount(_daiAmount, rate, daiVatBalance)); manager.move(_cdpId, address(this), toRad(_daiAmount)); if (vat.can(address(this), address(DAI_JOIN_ADDRESS)) == 0) { vat.hope(DAI_JOIN_ADDRESS); } DaiJoin(DAI_JOIN_ADDRESS).exit(address(this), _daiAmount); return _daiAmount; } /// @notice Adds collateral to the CDP /// @param _cdpId Id of the CDP /// @param _joinAddr Address of the join contract for the CDP collateral /// @param _amount Amount of collateral to add function addCollateral(uint _cdpId, address _joinAddr, uint _amount) internal { int convertAmount = 0; if (_joinAddr == ETH_JOIN_ADDRESS) { Join(_joinAddr).gem().deposit{value: _amount}(); convertAmount = toPositiveInt(_amount); } else { convertAmount = toPositiveInt(convertTo18(_joinAddr, _amount)); } Join(_joinAddr).gem().approve(_joinAddr, _amount); Join(_joinAddr).join(address(this), _amount); vat.frob( manager.ilks(_cdpId), manager.urns(_cdpId), address(this), address(this), convertAmount, 0 ); } /// @notice Draws collateral and returns it to DSProxy /// @dev If _amount is bigger than max available we'll draw max /// @param _cdpId Id of the CDP /// @param _joinAddr Address of the join contract for the CDP collateral /// @param _amount Amount of collateral to draw function drawCollateral(uint _cdpId, address _joinAddr, uint _amount) internal returns (uint) { uint frobAmount = _amount; if (Join(_joinAddr).dec() != 18) { frobAmount = _amount * (10 ** (18 - Join(_joinAddr).dec())); } manager.frob(_cdpId, -toPositiveInt(frobAmount), 0); manager.flux(_cdpId, address(this), frobAmount); Join(_joinAddr).exit(address(this), _amount); if (_joinAddr == ETH_JOIN_ADDRESS) { Join(_joinAddr).gem().withdraw(_amount); // Weth -> Eth } return _amount; } /// @notice Paybacks Dai debt /// @dev If the _daiAmount is bigger than the whole debt, returns extra Dai /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP /// @param _daiAmount Amount of Dai to payback /// @param _owner Address that owns the DSProxy that owns the CDP function paybackDebt(uint _cdpId, bytes32 _ilk, uint _daiAmount, address _owner) internal { address urn = manager.urns(_cdpId); uint wholeDebt = getAllDebt(VAT_ADDRESS, urn, urn, _ilk); if (_daiAmount > wholeDebt) { ERC20(DAI_ADDRESS).transfer(_owner, sub(_daiAmount, wholeDebt)); _daiAmount = wholeDebt; } if (ERC20(DAI_ADDRESS).allowance(address(this), DAI_JOIN_ADDRESS) == 0) { ERC20(DAI_ADDRESS).approve(DAI_JOIN_ADDRESS, uint(-1)); } daiJoin.join(urn, _daiAmount); manager.frob(_cdpId, 0, normalizePaybackAmount(VAT_ADDRESS, urn, _ilk)); } /// @notice Calculates the fee amount /// @param _amount Dai amount that is converted /// @param _gasCost Used for Monitor, estimated gas cost of tx /// @param _owner The address that controlls the DSProxy that owns the CDP function getFee(uint _amount, uint _gasCost, address _owner) internal returns (uint feeAmount) { uint fee = SERVICE_FEE; if (Discount(DISCOUNT_ADDRESS).isCustomFeeSet(_owner)) { fee = Discount(DISCOUNT_ADDRESS).getCustomServiceFee(_owner); } feeAmount = (fee == 0) ? 0 : (_amount / fee); if (_gasCost != 0) { uint ethDaiPrice = getPrice(ETH_ILK); _gasCost = rmul(_gasCost, ethDaiPrice); feeAmount = add(feeAmount, _gasCost); } // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } ERC20(DAI_ADDRESS).transfer(WALLET_ID, feeAmount); } /// @notice Gets the maximum amount of collateral available to draw /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP /// @param _joinAddr Joind address of collateral /// @dev Substracts 10 wei to aviod rounding error later on function getMaxCollateral(uint _cdpId, bytes32 _ilk, address _joinAddr) public view returns (uint) { uint price = getPrice(_ilk); (uint collateral, uint debt) = getCdpInfo(manager, _cdpId, _ilk); (, uint mat) = Spotter(SPOTTER_ADDRESS).ilks(_ilk); uint maxCollateral = sub(sub(collateral, (div(mul(mat, debt), price))), 10); uint normalizeMaxCollateral = maxCollateral; if (Join(_joinAddr).dec() != 18) { normalizeMaxCollateral = maxCollateral / (10 ** (18 - Join(_joinAddr).dec())); } return normalizeMaxCollateral; } /// @notice Gets the maximum amount of debt available to generate /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP /// @dev Substracts 10 wei to aviod rounding error later on function getMaxDebt(uint _cdpId, bytes32 _ilk) public virtual view returns (uint) { uint price = getPrice(_ilk); (, uint mat) = spotter.ilks(_ilk); (uint collateral, uint debt) = getCdpInfo(manager, _cdpId, _ilk); return sub(sub(div(mul(collateral, price), mat), debt), 10); } /// @notice Gets a price of the asset /// @param _ilk Ilk of the CDP function getPrice(bytes32 _ilk) public view returns (uint) { (, uint mat) = spotter.ilks(_ilk); (,,uint spot,,) = vat.ilks(_ilk); return rmul(rmul(spot, spotter.par()), mat); } /// @notice Gets CDP ratio /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP function getRatio(uint _cdpId, bytes32 _ilk) public view returns (uint) { uint price = getPrice( _ilk); (uint collateral, uint debt) = getCdpInfo(manager, _cdpId, _ilk); if (debt == 0) return 0; return rdiv(wmul(collateral, price), debt); } /// @notice Gets CDP info (collateral, debt, price, ilk) /// @param _cdpId Id of the CDP function getCdpDetailedInfo(uint _cdpId) public view returns (uint collateral, uint debt, uint price, bytes32 ilk) { address urn = manager.urns(_cdpId); ilk = manager.ilks(_cdpId); (collateral, debt) = vat.urns(ilk, urn); (,uint rate,,,) = vat.ilks(ilk); debt = rmul(debt, rate); price = getPrice(ilk); } } contract MCDSaverTaker is MCDSaverProxy, GasBurner { address payable public constant MCD_SAVER_FLASH_LOAN = 0x28e444b53a9e7E3F6fFe50E93b18dCce7838551F; address public constant AAVE_POOL_CORE = 0x3dfd23A6c5E8BbcFc9581d2E864a68feb6a076d3; ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); function boostWithLoan( SaverExchangeCore.ExchangeData memory _exchangeData, uint _cdpId, uint _gasCost, address _joinAddr ) public payable burnGas(25) { uint256 maxDebt = getMaxDebt(_cdpId, manager.ilks(_cdpId)); if (maxDebt >= _exchangeData.srcAmount) { boost(_exchangeData, _cdpId, _gasCost, _joinAddr); return; } MCD_SAVER_FLASH_LOAN.transfer(msg.value); // 0x fee uint256 loanAmount = sub(_exchangeData.srcAmount, maxDebt); uint maxLiq = getAvailableLiquidity(_joinAddr); loanAmount = loanAmount > maxLiq ? maxLiq : loanAmount; manager.cdpAllow(_cdpId, MCD_SAVER_FLASH_LOAN, 1); bytes memory paramsData = abi.encode(packExchangeData(_exchangeData), _cdpId, _gasCost, _joinAddr, false); lendingPool.flashLoan(MCD_SAVER_FLASH_LOAN, DAI_ADDRESS, loanAmount, paramsData); manager.cdpAllow(_cdpId, MCD_SAVER_FLASH_LOAN, 0); } function repayWithLoan( SaverExchangeCore.ExchangeData memory _exchangeData, uint _cdpId, uint _gasCost, address _joinAddr ) public payable burnGas(25) { uint256 maxColl = getMaxCollateral(_cdpId, manager.ilks(_cdpId), _joinAddr); if (maxColl >= _exchangeData.srcAmount) { repay(_exchangeData, _cdpId, _gasCost, _joinAddr); return; } MCD_SAVER_FLASH_LOAN.transfer(msg.value); // 0x fee uint256 loanAmount = sub(_exchangeData.srcAmount, maxColl); uint maxLiq = getAvailableLiquidity(_joinAddr); loanAmount = loanAmount > maxLiq ? maxLiq : loanAmount; manager.cdpAllow(_cdpId, MCD_SAVER_FLASH_LOAN, 1); bytes memory paramsData = abi.encode(packExchangeData(_exchangeData), _cdpId, _gasCost, _joinAddr, true); lendingPool.flashLoan(MCD_SAVER_FLASH_LOAN, getAaveCollAddr(_joinAddr), loanAmount, paramsData); manager.cdpAllow(_cdpId, MCD_SAVER_FLASH_LOAN, 0); } /// @notice Gets the maximum amount of debt available to generate /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP function getMaxDebt(uint256 _cdpId, bytes32 _ilk) public override view returns (uint256) { uint256 price = getPrice(_ilk); (, uint256 mat) = spotter.ilks(_ilk); (uint256 collateral, uint256 debt) = getCdpInfo(manager, _cdpId, _ilk); return sub(wdiv(wmul(collateral, price), mat), debt); } function getAaveCollAddr(address _joinAddr) internal view returns (address) { if (_joinAddr == 0x2F0b23f53734252Bda2277357e97e1517d6B042A || _joinAddr == 0x775787933e92b709f2a3C70aa87999696e74A9F8) { return KYBER_ETH_ADDRESS; } else { return getCollateralAddr(_joinAddr); } } function getAvailableLiquidity(address _joinAddr) internal view returns (uint liquidity) { address tokenAddr = getAaveCollAddr(_joinAddr); if (tokenAddr == KYBER_ETH_ADDRESS) { liquidity = AAVE_POOL_CORE.balance; } else { liquidity = ERC20(tokenAddr).balanceOf(AAVE_POOL_CORE); } } function _packData( uint _cdpId, uint _gasCost, address _joinAddr, SaverExchangeCore.ExchangeData memory exchangeData ) internal pure returns (uint[6] memory numData, address[5] memory addrData, bytes memory callData) { numData = [ exchangeData.srcAmount, exchangeData.destAmount, exchangeData.minPrice, exchangeData.price0x, _cdpId, _gasCost ]; addrData = [ exchangeData.srcAddr, exchangeData.destAddr, exchangeData.exchangeAddr, exchangeData.wrapper, _joinAddr ]; callData = exchangeData.callData; } } contract SavingsProxy is DSRSavingsProtocol, CompoundSavingsProtocol { address public constant ADAI_ADDRESS = 0xfC1E690f61EFd961294b3e1Ce3313fBD8aa4f85d; address public constant SAVINGS_DYDX_ADDRESS = 0x03b1565e070df392e48e7a8e01798C4B00E534A5; address public constant SAVINGS_AAVE_ADDRESS = 0x535B9035E9bA8D7efe0FeAEac885fb65b303E37C; address public constant NEW_IDAI_ADDRESS = 0x493C57C4763932315A328269E1ADaD09653B9081; address public constant COMP_ADDRESS = 0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B; address public constant SAVINGS_LOGGER_ADDRESS = 0x89b3635BD2bAD145C6f92E82C9e83f06D5654984; address public constant SOLO_MARGIN_ADDRESS = 0x1E0447b19BB6EcFdAe1e4AE1694b0C3659614e4e; enum SavingsProtocol {Compound, Dydx, Fulcrum, Dsr, Aave} function deposit(SavingsProtocol _protocol, uint256 _amount) public { if (_protocol == SavingsProtocol.Dsr) { dsrDeposit(_amount, true); } else if (_protocol == SavingsProtocol.Compound) { compDeposit(msg.sender, _amount); } else { _deposit(_protocol, _amount, true); } SavingsLogger(SAVINGS_LOGGER_ADDRESS).logDeposit(msg.sender, uint8(_protocol), _amount); } function withdraw(SavingsProtocol _protocol, uint256 _amount) public { if (_protocol == SavingsProtocol.Dsr) { dsrWithdraw(_amount, true); } else if (_protocol == SavingsProtocol.Compound) { compWithdraw(msg.sender, _amount); } else { _withdraw(_protocol, _amount, true); } SavingsLogger(SAVINGS_LOGGER_ADDRESS).logWithdraw(msg.sender, uint8(_protocol), _amount); } function swap(SavingsProtocol _from, SavingsProtocol _to, uint256 _amount) public { if (_from == SavingsProtocol.Dsr) { dsrWithdraw(_amount, false); } else if (_from == SavingsProtocol.Compound) { compWithdraw(msg.sender, _amount); } else { _withdraw(_from, _amount, false); } // possible to withdraw 1-2 wei less than actual amount due to division precision // so we deposit all amount on DSProxy uint256 amountToDeposit = ERC20(DAI_ADDRESS).balanceOf(address(this)); if (_to == SavingsProtocol.Dsr) { dsrDeposit(amountToDeposit, false); } else if (_from == SavingsProtocol.Compound) { compDeposit(msg.sender, _amount); } else { _deposit(_to, amountToDeposit, false); } SavingsLogger(SAVINGS_LOGGER_ADDRESS).logSwap( msg.sender, uint8(_from), uint8(_to), _amount ); } function withdrawDai() public { ERC20(DAI_ADDRESS).transfer(msg.sender, ERC20(DAI_ADDRESS).balanceOf(address(this))); } function claimComp() public { ComptrollerInterface(COMP_ADDRESS).claimComp(address(this)); } function getAddress(SavingsProtocol _protocol) public pure returns (address) { if (_protocol == SavingsProtocol.Dydx) { return SAVINGS_DYDX_ADDRESS; } if (_protocol == SavingsProtocol.Aave) { return SAVINGS_AAVE_ADDRESS; } } function _deposit(SavingsProtocol _protocol, uint256 _amount, bool _fromUser) internal { if (_fromUser) { ERC20(DAI_ADDRESS).transferFrom(msg.sender, address(this), _amount); } approveDeposit(_protocol); ProtocolInterface(getAddress(_protocol)).deposit(address(this), _amount); endAction(_protocol); } function _withdraw(SavingsProtocol _protocol, uint256 _amount, bool _toUser) public { approveWithdraw(_protocol); ProtocolInterface(getAddress(_protocol)).withdraw(address(this), _amount); endAction(_protocol); if (_toUser) { withdrawDai(); } } function endAction(SavingsProtocol _protocol) internal { if (_protocol == SavingsProtocol.Dydx) { setDydxOperator(false); } } function approveDeposit(SavingsProtocol _protocol) internal { if (_protocol == SavingsProtocol.Compound || _protocol == SavingsProtocol.Fulcrum || _protocol == SavingsProtocol.Aave) { ERC20(DAI_ADDRESS).approve(getAddress(_protocol), uint256(-1)); } if (_protocol == SavingsProtocol.Dydx) { ERC20(DAI_ADDRESS).approve(SOLO_MARGIN_ADDRESS, uint256(-1)); setDydxOperator(true); } } function approveWithdraw(SavingsProtocol _protocol) internal { if (_protocol == SavingsProtocol.Compound) { ERC20(NEW_CDAI_ADDRESS).approve(getAddress(_protocol), uint256(-1)); } if (_protocol == SavingsProtocol.Dydx) { setDydxOperator(true); } if (_protocol == SavingsProtocol.Fulcrum) { ERC20(NEW_IDAI_ADDRESS).approve(getAddress(_protocol), uint256(-1)); } if (_protocol == SavingsProtocol.Aave) { ERC20(ADAI_ADDRESS).approve(getAddress(_protocol), uint256(-1)); } } function setDydxOperator(bool _trusted) internal { ISoloMargin.OperatorArg[] memory operatorArgs = new ISoloMargin.OperatorArg[](1); operatorArgs[0] = ISoloMargin.OperatorArg({ operator: getAddress(SavingsProtocol.Dydx), trusted: _trusted }); ISoloMargin(SOLO_MARGIN_ADDRESS).setOperators(operatorArgs); } } contract LoanShifterReceiver is SaverExchangeCore, FlashLoanReceiverBase, AdminAuth { ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; ShifterRegistry public constant shifterRegistry = ShifterRegistry(0x988B6CFBf3332FF98FFBdED665b1F53a61f92612); struct ParamData { bytes proxyData1; bytes proxyData2; address proxy; address debtAddr; uint8 protocol1; uint8 protocol2; uint8 swapType; } constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public {} function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { // Format the call data for DSProxy (ParamData memory paramData, ExchangeData memory exchangeData) = packFunctionCall(_amount, _fee, _params); address protocolAddr1 = shifterRegistry.getAddr(getNameByProtocol(paramData.protocol1)); address protocolAddr2 = shifterRegistry.getAddr(getNameByProtocol(paramData.protocol2)); // Send Flash loan amount to DSProxy sendToProxy(payable(paramData.proxy), _reserve, _amount); // Execute the Close/Change debt operation DSProxyInterface(paramData.proxy).execute(protocolAddr1, paramData.proxyData1); // if (paramData.swapType == 1) { // COLL_SWAP // exchangeData.srcAmount = getBalance(exchangeData.srcAddr); // (, uint amount) = _sell(exchangeData); // sendToProxy(payable(paramData.proxy), exchangeData.destAddr, amount); // } else if (paramData.swapType == 2) { // DEBT_SWAP // exchangeData.destAmount = (_amount + _fee); // _buy(exchangeData); // } else { // NO_SWAP just send tokens to proxy // sendToProxy(payable(paramData.proxy), exchangeData.srcAddr, getBalance(exchangeData.srcAddr)); // } // // Execute the Open operation (Skip if it's debt swap) // if (paramData.swapType != 2) { // DSProxyInterface(paramData.proxy).execute(protocolAddr2, paramData.proxyData2); // } // Repay FL transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } } function packFunctionCall(uint _amount, uint _fee, bytes memory _params) internal pure returns (ParamData memory paramData, ExchangeData memory exchangeData) { ( uint[8] memory numData, // collAmount, debtAmount, id1, id2, srcAmount, destAmount, minPrice, price0x address[8] memory addrData, // addrLoan1, addrLoan2, debtAddr1, debtAddr2, srcAddr, destAddr, exchangeAddr, wrapper uint8[3] memory enumData, // fromProtocol, toProtocol, swapType bytes memory callData, address proxy ) = abi.decode(_params, (uint256[8],address[8],uint8[3],bytes,address)); bytes memory proxyData1; bytes memory proxyData2; uint openDebtAmount = (_amount + _fee); if (enumData[0] == 0) { // MAKER FROM proxyData1 = abi.encodeWithSignature("close(uint256,address,uint256,uint256)", numData[2], addrData[0], _amount, numData[0]); } else if(enumData[0] == 1) { // COMPOUND FROM proxyData1 = abi.encodeWithSignature( "close(address,address,uint256,uint256)", addrData[0], addrData[2], numData[0], numData[1]); } if (enumData[1] == 0) { // MAKER TO proxyData2 = abi.encodeWithSignature("open(uint256,address,uint256)", numData[3], addrData[1], openDebtAmount); } else if(enumData[1] == 1) { // COMPOUND TO proxyData2 = abi.encodeWithSignature("open(address,address,uint256)", addrData[1], addrData[3], openDebtAmount); } // Call specific function if it's a debt swap if (enumData[2] == 2) { // DEBT_SWAP proxyData1 = abi.encodeWithSignature("changeDebt(address,address,uint256,uint256)", addrData[2], addrData[3], (_amount + _fee), numData[4]); } paramData = ParamData({ proxyData1: proxyData1, proxyData2: proxyData2, proxy: proxy, debtAddr: addrData[2], protocol1: enumData[0], protocol2: enumData[1], swapType: enumData[2] }); exchangeData = SaverExchangeCore.ExchangeData({ srcAddr: addrData[4], destAddr: addrData[5], srcAmount: numData[4], destAmount: numData[5], minPrice: numData[6], wrapper: addrData[7], exchangeAddr: addrData[6], callData: callData, price0x: numData[7] }); } function sendToProxy(address payable _proxy, address _reserve, uint _amount) internal { if (_reserve != ETH_ADDRESS) { ERC20(_reserve).safeTransfer(_proxy, _amount); } _proxy.transfer(address(this).balance); } function getNameByProtocol(uint8 _proto) internal pure returns (string memory) { if (_proto == 0) { return "MCD_SHIFTER"; } else if (_proto == 1) { return "COMP_SHIFTER"; } } receive() external override(FlashLoanReceiverBase, SaverExchangeCore) payable {} } contract CompShifter is CompoundSaverHelper { address public constant COMPTROLLER_ADDR = 0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B; function getWholeDebt(uint _cdpId, address _joinAddr) public virtual returns(uint loanAmount) { return CTokenInterface(_joinAddr).borrowBalanceCurrent(msg.sender); } function close( address _cCollAddr, address _cBorrowAddr, uint _collAmount, uint _debtAmount ) public { address collAddr = getUnderlyingAddr(_cCollAddr); // payback debt paybackDebt(_debtAmount, _cBorrowAddr, getUnderlyingAddr(_cBorrowAddr), tx.origin); // draw coll if (CTokenInterface(_cBorrowAddr).borrowBalanceCurrent(address(this)) == 0) { uint cTokenBalance = CTokenInterface(_cCollAddr).balanceOf(address(this)); require(CTokenInterface(_cCollAddr).redeem(cTokenBalance) == 0); } else { require(CTokenInterface(_cCollAddr).redeemUnderlying(_collAmount) == 0); } // Send back money to repay FL if (collAddr == ETH_ADDRESS) { msg.sender.transfer(address(this).balance); } else { ERC20(collAddr).transfer(msg.sender, ERC20(collAddr).balanceOf(address(this))); } } function changeDebt( address _cBorrowAddrOld, address _cBorrowAddrNew, uint _debtAmountOld, uint _debtAmountNew ) public { address borrowAddrNew = getUnderlyingAddr(_cBorrowAddrNew); // payback debt in one token paybackDebt(_debtAmountOld, _cBorrowAddrOld, getUnderlyingAddr(_cBorrowAddrOld), tx.origin); // draw debt in another one borrowCompound(_cBorrowAddrNew, _debtAmountNew); // Send back money to repay FL if (borrowAddrNew == ETH_ADDRESS) { msg.sender.transfer(address(this).balance); } else { ERC20(borrowAddrNew).transfer(msg.sender, ERC20(borrowAddrNew).balanceOf(address(this))); } } function open( address _cCollAddr, address _cBorrowAddr, uint _debtAmount ) public { address collAddr = getUnderlyingAddr(_cCollAddr); address borrowAddr = getUnderlyingAddr(_cBorrowAddr); uint collAmount = 0; if (collAddr == ETH_ADDRESS) { collAmount = address(this).balance; } else { collAmount = ERC20(collAddr).balanceOf(address(this)); } depositCompound(collAddr, _cCollAddr, collAmount); // draw debt borrowCompound(_cBorrowAddr, _debtAmount); // Send back money to repay FL if (borrowAddr == ETH_ADDRESS) { msg.sender.transfer(address(this).balance); } else { ERC20(borrowAddr).transfer(msg.sender, ERC20(borrowAddr).balanceOf(address(this))); } } function depositCompound(address _tokenAddr, address _cTokenAddr, uint _amount) internal { approveCToken(_tokenAddr, _cTokenAddr); enterMarket(_cTokenAddr); if (_tokenAddr != ETH_ADDRESS) { require(CTokenInterface(_cTokenAddr).mint(_amount) == 0, "mint error"); } else { CEtherInterface(_cTokenAddr).mint{value: _amount}(); } } function borrowCompound(address _cTokenAddr, uint _amount) internal { enterMarket(_cTokenAddr); require(CTokenInterface(_cTokenAddr).borrow(_amount) == 0); } function enterMarket(address _cTokenAddr) public { address[] memory markets = new address[](1); markets[0] = _cTokenAddr; ComptrollerInterface(COMPTROLLER_ADDR).enterMarkets(markets); } } contract McdShifter is MCDSaverProxy { address public constant OPEN_PROXY_ACTIONS = 0x6d0984E80a86f26c0dd564ca0CF74a8E9Da03305; function getLoanAmount(uint _cdpId, address _joinAddr) public view virtual returns(uint loanAmount) { bytes32 ilk = manager.ilks(_cdpId); (, uint rate,,,) = vat.ilks(ilk); (, uint art) = vat.urns(ilk, manager.urns(_cdpId)); uint dai = vat.dai(manager.urns(_cdpId)); uint rad = sub(mul(art, rate), dai); loanAmount = rad / RAY; loanAmount = mul(loanAmount, RAY) < rad ? loanAmount + 1 : loanAmount; } function close( uint _cdpId, address _joinAddr, uint _loanAmount, uint _collateral ) public { address owner = getOwner(manager, _cdpId); bytes32 ilk = manager.ilks(_cdpId); (uint maxColl, ) = getCdpInfo(manager, _cdpId, ilk); // repay dai debt cdp paybackDebt(_cdpId, ilk, _loanAmount, owner); maxColl = _collateral > maxColl ? maxColl : _collateral; // withdraw collateral from cdp drawMaxCollateral(_cdpId, _joinAddr, maxColl); // send back to msg.sender if (_joinAddr == ETH_JOIN_ADDRESS) { msg.sender.transfer(address(this).balance); } else { ERC20 collToken = ERC20(getCollateralAddr(_joinAddr)); collToken.transfer(msg.sender, collToken.balanceOf(address(this))); } } function open( uint _cdpId, address _joinAddr, uint _debtAmount ) public { uint collAmount = 0; if (_joinAddr == ETH_JOIN_ADDRESS) { collAmount = address(this).balance; } else { collAmount = ERC20(address(Join(_joinAddr).gem())).balanceOf(address(this)); } if (_cdpId == 0) { openAndWithdraw(collAmount, _debtAmount, address(this), _joinAddr); } else { // add collateral addCollateral(_cdpId, _joinAddr, collAmount); // draw debt drawDai(_cdpId, manager.ilks(_cdpId), _debtAmount); } // transfer to repay FL ERC20(DAI_ADDRESS).transfer(msg.sender, ERC20(DAI_ADDRESS).balanceOf(address(this))); if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } } function openAndWithdraw(uint _collAmount, uint _debtAmount, address _proxy, address _joinAddrTo) internal { bytes32 ilk = Join(_joinAddrTo).ilk(); if (_joinAddrTo == ETH_JOIN_ADDRESS) { MCDCreateProxyActions(OPEN_PROXY_ACTIONS).openLockETHAndDraw{value: address(this).balance}( address(manager), JUG_ADDRESS, ETH_JOIN_ADDRESS, DAI_JOIN_ADDRESS, ilk, _debtAmount, _proxy ); } else { ERC20(getCollateralAddr(_joinAddrTo)).approve(OPEN_PROXY_ACTIONS, uint256(-1)); MCDCreateProxyActions(OPEN_PROXY_ACTIONS).openLockGemAndDraw( address(manager), JUG_ADDRESS, _joinAddrTo, DAI_JOIN_ADDRESS, ilk, _collAmount, _debtAmount, true, _proxy ); } } function drawMaxCollateral(uint _cdpId, address _joinAddr, uint _amount) internal returns (uint) { manager.frob(_cdpId, -toPositiveInt(_amount), 0); manager.flux(_cdpId, address(this), _amount); uint joinAmount = _amount; if (Join(_joinAddr).dec() != 18) { joinAmount = _amount / (10 ** (18 - Join(_joinAddr).dec())); } Join(_joinAddr).exit(address(this), joinAmount); if (_joinAddr == ETH_JOIN_ADDRESS) { Join(_joinAddr).gem().withdraw(joinAmount); // Weth -> Eth } return joinAmount; } } contract AaveSaverProxy is GasBurner, SaverExchangeCore, AaveHelper { address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; uint public constant VARIABLE_RATE = 2; function repay(ExchangeData memory _data, uint _gasCost) public payable burnGas(20) { address lendingPoolCore = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); address payable user = payable(getUserAddress()); uint256 maxCollateral = getMaxCollateral(_data.srcAddr, address(this)); // don't swap more than maxCollateral _data.srcAmount = _data.srcAmount > maxCollateral ? maxCollateral : _data.srcAmount; // redeem collateral address aTokenCollateral = ILendingPool(lendingPoolCore).getReserveATokenAddress(_data.srcAddr); IAToken(aTokenCollateral).redeem(_data.srcAmount); // swap (, uint256 destAmount) = _sell(_data); destAmount -= getFee(destAmount, user, _gasCost, _data.destAddr); // payback if (_data.destAddr == ETH_ADDR) { ILendingPool(lendingPool).repay{value: destAmount}(_data.destAddr, destAmount, payable(address(this))); } else { approveToken(_data.destAddr, lendingPoolCore); ILendingPool(lendingPool).repay(_data.destAddr, destAmount, payable(address(this))); } // first return 0x fee to msg.sender as it is the address that actually sent 0x fee sendContractBalance(ETH_ADDR, msg.sender, min(address(this).balance, msg.value)); // send all leftovers from dest addr to proxy owner sendFullContractBalance(_data.destAddr, user); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "AaveRepay", abi.encode(_data.srcAddr, _data.destAddr, _data.srcAmount, destAmount)); } function boost(ExchangeData memory _data, uint _gasCost) public payable burnGas(20) { address lendingPoolCore = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); (,,,,,,,,,bool collateralEnabled) = ILendingPool(lendingPool).getUserReserveData(_data.destAddr, address(this)); address payable user = payable(getUserAddress()); uint256 maxBorrow = getMaxBorrow(_data.srcAddr, address(this)); _data.srcAmount = _data.srcAmount > maxBorrow ? maxBorrow : _data.srcAmount; // borrow amount ILendingPool(lendingPool).borrow(_data.srcAddr, _data.srcAmount, VARIABLE_RATE, AAVE_REFERRAL_CODE); _data.srcAmount -= getFee(_data.srcAmount, user, _gasCost, _data.srcAddr); // swap (, uint256 destAmount) = _sell(_data); if (_data.destAddr == ETH_ADDR) { ILendingPool(lendingPool).deposit{value: destAmount}(_data.destAddr, destAmount, AAVE_REFERRAL_CODE); } else { approveToken(_data.destAddr, lendingPoolCore); ILendingPool(lendingPool).deposit(_data.destAddr, destAmount, AAVE_REFERRAL_CODE); } if (!collateralEnabled) { ILendingPool(lendingPool).setUserUseReserveAsCollateral(_data.destAddr, true); } // returning to msg.sender as it is the address that actually sent 0x fee sendContractBalance(ETH_ADDR, msg.sender, min(address(this).balance, msg.value)); // send all leftovers from dest addr to proxy owner sendFullContractBalance(_data.destAddr, user); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "AaveBoost", abi.encode(_data.srcAddr, _data.destAddr, _data.srcAmount, destAmount)); } } contract CompoundLoanInfo is CompoundSafetyRatio { struct LoanData { address user; uint128 ratio; address[] collAddr; address[] borrowAddr; uint[] collAmounts; uint[] borrowAmounts; } struct TokenInfo { address cTokenAddress; address underlyingTokenAddress; uint collateralFactor; uint price; } struct TokenInfoFull { address underlyingTokenAddress; uint supplyRate; uint borrowRate; uint exchangeRate; uint marketLiquidity; uint totalSupply; uint totalBorrow; uint collateralFactor; uint price; } address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant CETH_ADDRESS = 0x4Ddc2D193948926D02f9B1fE9e1daa0718270ED5; /// @notice Calcualted the ratio of coll/debt for a compound user /// @param _user Address of the user function getRatio(address _user) public view returns (uint) { // For each asset the account is in return getSafetyRatio(_user); } /// @notice Fetches Compound prices for tokens /// @param _cTokens Arr. of cTokens for which to get the prices /// @return prices Array of prices function getPrices(address[] memory _cTokens) public view returns (uint[] memory prices) { prices = new uint[](_cTokens.length); address oracleAddr = comp.oracle(); for (uint i = 0; i < _cTokens.length; ++i) { prices[i] = CompoundOracleInterface(oracleAddr).getUnderlyingPrice(_cTokens[i]); } } /// @notice Fetches Compound collateral factors for tokens /// @param _cTokens Arr. of cTokens for which to get the coll. factors /// @return collFactors Array of coll. factors function getCollFactors(address[] memory _cTokens) public view returns (uint[] memory collFactors) { collFactors = new uint[](_cTokens.length); for (uint i = 0; i < _cTokens.length; ++i) { (, collFactors[i]) = comp.markets(_cTokens[i]); } } /// @notice Fetches all the collateral/debt address and amounts, denominated in usd /// @param _user Address of the user /// @return data LoanData information function getLoanData(address _user) public view returns (LoanData memory data) { address[] memory assets = comp.getAssetsIn(_user); address oracleAddr = comp.oracle(); data = LoanData({ user: _user, ratio: 0, collAddr: new address[](assets.length), borrowAddr: new address[](assets.length), collAmounts: new uint[](assets.length), borrowAmounts: new uint[](assets.length) }); uint collPos = 0; uint borrowPos = 0; for (uint i = 0; i < assets.length; i++) { address asset = assets[i]; (, uint cTokenBalance, uint borrowBalance, uint exchangeRateMantissa) = CTokenInterface(asset).getAccountSnapshot(_user); Exp memory oraclePrice; if (cTokenBalance != 0 || borrowBalance != 0) { oraclePrice = Exp({mantissa: CompoundOracleInterface(oracleAddr).getUnderlyingPrice(asset)}); } // Sum up collateral in Usd if (cTokenBalance != 0) { Exp memory exchangeRate = Exp({mantissa: exchangeRateMantissa}); (, Exp memory tokensToUsd) = mulExp(exchangeRate, oraclePrice); data.collAddr[collPos] = asset; (, data.collAmounts[collPos]) = mulScalarTruncate(tokensToUsd, cTokenBalance); collPos++; } // Sum up debt in Usd if (borrowBalance != 0) { data.borrowAddr[borrowPos] = asset; (, data.borrowAmounts[borrowPos]) = mulScalarTruncate(oraclePrice, borrowBalance); borrowPos++; } } data.ratio = uint128(getSafetyRatio(_user)); return data; } function getTokenBalances(address _user, address[] memory _cTokens) public view returns (uint[] memory balances, uint[] memory borrows) { balances = new uint[](_cTokens.length); borrows = new uint[](_cTokens.length); for (uint i = 0; i < _cTokens.length; i++) { address asset = _cTokens[i]; (, uint cTokenBalance, uint borrowBalance, uint exchangeRateMantissa) = CTokenInterface(asset).getAccountSnapshot(_user); Exp memory exchangeRate = Exp({mantissa: exchangeRateMantissa}); (, balances[i]) = mulScalarTruncate(exchangeRate, cTokenBalance); borrows[i] = borrowBalance; } } /// @notice Fetches all the collateral/debt address and amounts, denominated in usd /// @param _users Addresses of the user /// @return loans Array of LoanData information function getLoanDataArr(address[] memory _users) public view returns (LoanData[] memory loans) { loans = new LoanData[](_users.length); for (uint i = 0; i < _users.length; ++i) { loans[i] = getLoanData(_users[i]); } } /// @notice Calcualted the ratio of coll/debt for a compound user /// @param _users Addresses of the user /// @return ratios Array of ratios function getRatios(address[] memory _users) public view returns (uint[] memory ratios) { ratios = new uint[](_users.length); for (uint i = 0; i < _users.length; ++i) { ratios[i] = getSafetyRatio(_users[i]); } } /// @notice Information about cTokens /// @param _cTokenAddresses Array of cTokens addresses /// @return tokens Array of cTokens infomartion function getTokensInfo(address[] memory _cTokenAddresses) public returns(TokenInfo[] memory tokens) { tokens = new TokenInfo[](_cTokenAddresses.length); address oracleAddr = comp.oracle(); for (uint i = 0; i < _cTokenAddresses.length; ++i) { (, uint collFactor) = comp.markets(_cTokenAddresses[i]); tokens[i] = TokenInfo({ cTokenAddress: _cTokenAddresses[i], underlyingTokenAddress: getUnderlyingAddr(_cTokenAddresses[i]), collateralFactor: collFactor, price: CompoundOracleInterface(oracleAddr).getUnderlyingPrice(_cTokenAddresses[i]) }); } } /// @notice Information about cTokens /// @param _cTokenAddresses Array of cTokens addresses /// @return tokens Array of cTokens infomartion function getFullTokensInfo(address[] memory _cTokenAddresses) public returns(TokenInfoFull[] memory tokens) { tokens = new TokenInfoFull[](_cTokenAddresses.length); address oracleAddr = comp.oracle(); for (uint i = 0; i < _cTokenAddresses.length; ++i) { (, uint collFactor) = comp.markets(_cTokenAddresses[i]); CTokenInterface cToken = CTokenInterface(_cTokenAddresses[i]); tokens[i] = TokenInfoFull({ underlyingTokenAddress: getUnderlyingAddr(_cTokenAddresses[i]), supplyRate: cToken.supplyRatePerBlock(), borrowRate: cToken.borrowRatePerBlock(), exchangeRate: cToken.exchangeRateCurrent(), marketLiquidity: cToken.getCash(), totalSupply: cToken.totalSupply(), totalBorrow: cToken.totalBorrowsCurrent(), collateralFactor: collFactor, price: CompoundOracleInterface(oracleAddr).getUnderlyingPrice(_cTokenAddresses[i]) }); } } /// @notice Returns the underlying address of the cToken asset /// @param _cTokenAddress cToken address /// @return Token address of the cToken specified function getUnderlyingAddr(address _cTokenAddress) internal returns (address) { if (_cTokenAddress == CETH_ADDRESS) { return ETH_ADDRESS; } else { return CTokenInterface(_cTokenAddress).underlying(); } } } contract CompoundCreateReceiver is FlashLoanReceiverBase, SaverExchangeCore { ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); ShifterRegistry public constant shifterRegistry = ShifterRegistry(0x2E82103bD91053C781aaF39da17aE58ceE39d0ab); address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address payable public constant WALLET_ADDR = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; address public constant DISCOUNT_ADDR = 0x1b14E8D511c9A4395425314f849bD737BAF8208F; // solhint-disable-next-line no-empty-blocks constructor() public FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) {} /// @notice Called by Aave when sending back the FL amount /// @param _reserve The address of the borrowed token /// @param _amount Amount of FL tokens received /// @param _fee FL Aave fee /// @param _params The params that are sent from the original FL caller contract function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { // Format the call data for DSProxy (address payable proxyAddr, bytes memory proxyData, ExchangeData memory exchangeData) = packFunctionCall(_amount, _fee, _params); // Swap (, uint sellAmount) = _sell(exchangeData); // DFS fee getFee(sellAmount, exchangeData.destAddr, proxyAddr); // Send amount to DSProxy sendToProxy(proxyAddr, exchangeData.destAddr); address compOpenProxy = shifterRegistry.getAddr("COMP_SHIFTER"); // Execute the DSProxy call DSProxyInterface(proxyAddr).execute(compOpenProxy, proxyData); // Repay the loan with the money DSProxy sent back transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { // solhint-disable-next-line avoid-tx-origin tx.origin.transfer(address(this).balance); } } /// @notice Formats function data call so we can call it through DSProxy /// @param _amount Amount of FL /// @param _fee Fee of the FL /// @param _params Saver proxy params function packFunctionCall(uint _amount, uint _fee, bytes memory _params) internal pure returns (address payable, bytes memory proxyData, ExchangeData memory exchangeData) { ( uint[4] memory numData, // srcAmount, destAmount, minPrice, price0x address[6] memory cAddresses, // cCollAddr, cDebtAddr, srcAddr, destAddr, exchangeAddr, wrapper bytes memory callData, address proxy ) = abi.decode(_params, (uint256[4],address[6],bytes,address)); proxyData = abi.encodeWithSignature( "open(address,address,uint256)", cAddresses[0], cAddresses[1], (_amount + _fee)); exchangeData = SaverExchangeCore.ExchangeData({ srcAddr: cAddresses[2], destAddr: cAddresses[3], srcAmount: numData[0], destAmount: numData[1], minPrice: numData[2], wrapper: cAddresses[5], exchangeAddr: cAddresses[4], callData: callData, price0x: numData[3] }); return (payable(proxy), proxyData, exchangeData); } /// @notice Send the FL funds received to DSProxy /// @param _proxy DSProxy address /// @param _reserve Token address function sendToProxy(address payable _proxy, address _reserve) internal { if (_reserve != ETH_ADDRESS) { ERC20(_reserve).safeTransfer(_proxy, ERC20(_reserve).balanceOf(address(this))); } else { _proxy.transfer(address(this).balance); } } function getFee(uint _amount, address _tokenAddr, address _proxy) internal returns (uint feeAmount) { uint fee = 400; DSProxy proxy = DSProxy(payable(_proxy)); address user = proxy.owner(); if (Discount(DISCOUNT_ADDR).isCustomFeeSet(user)) { fee = Discount(DISCOUNT_ADDR).getCustomServiceFee(user); } feeAmount = (fee == 0) ? 0 : (_amount / fee); // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } if (_tokenAddr == ETH_ADDRESS) { WALLET_ADDR.transfer(feeAmount); } else { ERC20(_tokenAddr).safeTransfer(WALLET_ADDR, feeAmount); } } // solhint-disable-next-line no-empty-blocks receive() external override(FlashLoanReceiverBase, SaverExchangeCore) payable {} } contract CompoundSaverFlashLoan is FlashLoanReceiverBase, SaverExchangeCore { ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); address payable public COMPOUND_SAVER_FLASH_PROXY = 0x6423708d6B84Af237Ab309dF49f6b8Fb751f28FB; address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public owner; using SafeERC20 for ERC20; constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public { owner = msg.sender; } /// @notice Called by Aave when sending back the FL amount /// @param _reserve The address of the borrowed token /// @param _amount Amount of FL tokens received /// @param _fee FL Aave fee /// @param _params The params that are sent from the original FL caller contract function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { // Format the call data for DSProxy (bytes memory proxyData, address payable proxyAddr) = packFunctionCall(_amount, _fee, _params); // Send Flash loan amount to DSProxy sendLoanToProxy(proxyAddr, _reserve, _amount); // Execute the DSProxy call DSProxyInterface(proxyAddr).execute(COMPOUND_SAVER_FLASH_PROXY, proxyData); // Repay the loan with the money DSProxy sent back transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } } /// @notice Formats function data call so we can call it through DSProxy /// @param _amount Amount of FL /// @param _fee Fee of the FL /// @param _params Saver proxy params /// @return proxyData Formated function call data function packFunctionCall(uint _amount, uint _fee, bytes memory _params) internal pure returns (bytes memory proxyData, address payable) { ( bytes memory exDataBytes, address[2] memory cAddresses, // cCollAddress, cBorrowAddress uint256 gasCost, bool isRepay, address payable proxyAddr ) = abi.decode(_params, (bytes,address[2],uint256,bool,address)); ExchangeData memory _exData = unpackExchangeData(exDataBytes); uint[2] memory flashLoanData = [_amount, _fee]; if (isRepay) { proxyData = abi.encodeWithSignature("flashRepay((address,address,uint256,uint256,uint256,address,address,bytes,uint256),address[2],uint256,uint256[2])", _exData, cAddresses, gasCost, flashLoanData); } else { proxyData = abi.encodeWithSignature("flashBoost((address,address,uint256,uint256,uint256,address,address,bytes,uint256),address[2],uint256,uint256[2])", _exData, cAddresses, gasCost, flashLoanData); } return (proxyData, proxyAddr); } /// @notice Send the FL funds received to DSProxy /// @param _proxy DSProxy address /// @param _reserve Token address /// @param _amount Amount of tokens function sendLoanToProxy(address payable _proxy, address _reserve, uint _amount) internal { if (_reserve != ETH_ADDRESS) { ERC20(_reserve).safeTransfer(_proxy, _amount); } _proxy.transfer(address(this).balance); } receive() external override(SaverExchangeCore, FlashLoanReceiverBase) payable {} } contract CompoundSaverFlashProxy is SaverExchangeCore, CompoundSaverHelper { address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; using SafeERC20 for ERC20; /// @notice Repays the position and sends tokens back for FL /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress] /// @param _gasCost Gas cost for transaction /// @param _flashLoanData Data about FL [amount, fee] function flashRepay( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost, uint[2] memory _flashLoanData // amount, fee ) public payable { enterMarket(_cAddresses[0], _cAddresses[1]); address payable user = payable(getUserAddress()); uint flashBorrowed = _flashLoanData[0] + _flashLoanData[1]; uint maxColl = getMaxCollateral(_cAddresses[0], address(this)); // draw max coll require(CTokenInterface(_cAddresses[0]).redeemUnderlying(maxColl) == 0); address collToken = getUnderlyingAddr(_cAddresses[0]); address borrowToken = getUnderlyingAddr(_cAddresses[1]); uint swapAmount = 0; if (collToken != borrowToken) { // swap max coll + loanAmount (,swapAmount) = _sell(_exData); // get fee swapAmount -= getFee(swapAmount, user, _gasCost, _cAddresses[1]); } else { swapAmount = (maxColl + _flashLoanData[0]); swapAmount -= getGasCost(swapAmount, _gasCost, _cAddresses[1]); } // payback debt paybackDebt(swapAmount, _cAddresses[1], borrowToken, user); // draw collateral for loanAmount + loanFee require(CTokenInterface(_cAddresses[0]).redeemUnderlying(flashBorrowed) == 0); // repay flash loan returnFlashLoan(collToken, flashBorrowed); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "CompoundRepay", abi.encode(_exData.srcAmount, swapAmount, collToken, borrowToken)); } /// @notice Boosts the position and sends tokens back for FL /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress] /// @param _gasCost Gas cost for specific transaction /// @param _flashLoanData Data about FL [amount, fee] function flashBoost( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost, uint[2] memory _flashLoanData // amount, fee ) public payable { enterMarket(_cAddresses[0], _cAddresses[1]); address payable user = payable(getUserAddress()); uint flashBorrowed = _flashLoanData[0] + _flashLoanData[1]; // borrow max amount uint borrowAmount = getMaxBorrow(_cAddresses[1], address(this)); require(CTokenInterface(_cAddresses[1]).borrow(borrowAmount) == 0); address collToken = getUnderlyingAddr(_cAddresses[0]); address borrowToken = getUnderlyingAddr(_cAddresses[1]); uint swapAmount = 0; if (collToken != borrowToken) { // get dfs fee borrowAmount -= getFee((borrowAmount + _flashLoanData[0]), user, _gasCost, _cAddresses[1]); _exData.srcAmount = borrowAmount; (,swapAmount) = _sell(_exData); } else { swapAmount = (borrowAmount + _flashLoanData[0]); swapAmount -= getGasCost(swapAmount, _gasCost, _cAddresses[1]); } // deposit swaped collateral depositCollateral(collToken, _cAddresses[0], swapAmount); // borrow token to repay flash loan require(CTokenInterface(_cAddresses[1]).borrow(flashBorrowed) == 0); // repay flash loan returnFlashLoan(borrowToken, flashBorrowed); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "CompoundBoost", abi.encode(_exData.srcAmount, swapAmount, collToken, borrowToken)); } /// @notice Helper method to deposit tokens in Compound /// @param _collToken Token address of the collateral /// @param _cCollToken CToken address of the collateral /// @param _depositAmount Amount to deposit function depositCollateral(address _collToken, address _cCollToken, uint _depositAmount) internal { approveCToken(_collToken, _cCollToken); if (_collToken != ETH_ADDRESS) { require(CTokenInterface(_cCollToken).mint(_depositAmount) == 0); } else { CEtherInterface(_cCollToken).mint{value: _depositAmount}(); // reverts on fail } } /// @notice Returns the tokens/ether to the msg.sender which is the FL contract /// @param _tokenAddr Address of token which we return /// @param _amount Amount to return function returnFlashLoan(address _tokenAddr, uint _amount) internal { if (_tokenAddr != ETH_ADDRESS) { ERC20(_tokenAddr).safeTransfer(msg.sender, _amount); } msg.sender.transfer(address(this).balance); } } contract CompoundSaverProxy is CompoundSaverHelper, SaverExchangeCore { DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); /// @notice Withdraws collateral, converts to borrowed token and repays debt /// @dev Called through the DSProxy /// @param _exData Exchange data /// @param _cAddresses Coll/Debt addresses [cCollAddress, cBorrowAddress] /// @param _gasCost Gas cost for specific transaction function repay( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost ) public payable { enterMarket(_cAddresses[0], _cAddresses[1]); address payable user = payable(getUserAddress()); uint maxColl = getMaxCollateral(_cAddresses[0], address(this)); uint collAmount = (_exData.srcAmount > maxColl) ? maxColl : _exData.srcAmount; require(CTokenInterface(_cAddresses[0]).redeemUnderlying(collAmount) == 0); address collToken = getUnderlyingAddr(_cAddresses[0]); address borrowToken = getUnderlyingAddr(_cAddresses[1]); uint swapAmount = 0; if (collToken != borrowToken) { (, swapAmount) = _sell(_exData); swapAmount -= getFee(swapAmount, user, _gasCost, _cAddresses[1]); } else { swapAmount = collAmount; swapAmount -= getGasCost(swapAmount, _gasCost, _cAddresses[1]); } paybackDebt(swapAmount, _cAddresses[1], borrowToken, user); // handle 0x fee tx.origin.transfer(address(this).balance); // log amount, collToken, borrowToken logger.Log(address(this), msg.sender, "CompoundRepay", abi.encode(_exData.srcAmount, swapAmount, collToken, borrowToken)); } /// @notice Borrows token, converts to collateral, and adds to position /// @dev Called through the DSProxy /// @param _exData Exchange data /// @param _cAddresses Coll/Debt addresses [cCollAddress, cBorrowAddress] /// @param _gasCost Gas cost for specific transaction function boost( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost ) public payable { enterMarket(_cAddresses[0], _cAddresses[1]); address payable user = payable(getUserAddress()); uint maxBorrow = getMaxBorrow(_cAddresses[1], address(this)); uint borrowAmount = (_exData.srcAmount > maxBorrow) ? maxBorrow : _exData.srcAmount; require(CTokenInterface(_cAddresses[1]).borrow(borrowAmount) == 0); address collToken = getUnderlyingAddr(_cAddresses[0]); address borrowToken = getUnderlyingAddr(_cAddresses[1]); uint swapAmount = 0; if (collToken != borrowToken) { borrowAmount -= getFee(borrowAmount, user, _gasCost, _cAddresses[1]); _exData.srcAmount = borrowAmount; (,swapAmount) = _sell(_exData); } else { swapAmount = borrowAmount; swapAmount -= getGasCost(swapAmount, _gasCost, _cAddresses[1]); } approveCToken(collToken, _cAddresses[0]); if (collToken != ETH_ADDRESS) { require(CTokenInterface(_cAddresses[0]).mint(swapAmount) == 0); } else { CEtherInterface(_cAddresses[0]).mint{value: swapAmount}(); // reverts on fail } // handle 0x fee tx.origin.transfer(address(this).balance); // log amount, collToken, borrowToken logger.Log(address(this), msg.sender, "CompoundBoost", abi.encode(_exData.srcAmount, swapAmount, collToken, borrowToken)); } } contract SaverExchange is SaverExchangeCore, AdminAuth, GasBurner { using SafeERC20 for ERC20; uint256 public constant SERVICE_FEE = 800; // 0.125% Fee // solhint-disable-next-line const-name-snakecase DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); uint public burnAmount = 10; /// @notice Takes a src amount of tokens and converts it into the dest token /// @dev Takes fee from the _srcAmount before the exchange /// @param exData [srcAddr, destAddr, srcAmount, destAmount, minPrice, exchangeType, exchangeAddr, callData, price0x] /// @param _user User address who called the exchange function sell(ExchangeData memory exData, address payable _user) public payable burnGas(burnAmount) { // take fee uint dfsFee = getFee(exData.srcAmount, exData.srcAddr); exData.srcAmount = sub(exData.srcAmount, dfsFee); // Perform the exchange (address wrapper, uint destAmount) = _sell(exData); // send back any leftover ether or tokens sendLeftover(exData.srcAddr, exData.destAddr, _user); // log the event logger.Log(address(this), msg.sender, "ExchangeSell", abi.encode(wrapper, exData.srcAddr, exData.destAddr, exData.srcAmount, destAmount)); } /// @notice Takes a dest amount of tokens and converts it from the src token /// @dev Send always more than needed for the swap, extra will be returned /// @param exData [srcAddr, destAddr, srcAmount, destAmount, minPrice, exchangeType, exchangeAddr, callData, price0x] /// @param _user User address who called the exchange function buy(ExchangeData memory exData, address payable _user) public payable burnGas(burnAmount){ uint dfsFee = getFee(exData.srcAmount, exData.srcAddr); exData.srcAmount = sub(exData.srcAmount, dfsFee); // Perform the exchange (address wrapper, uint srcAmount) = _buy(exData); // send back any leftover ether or tokens sendLeftover(exData.srcAddr, exData.destAddr, _user); // log the event logger.Log(address(this), msg.sender, "ExchangeBuy", abi.encode(wrapper, exData.srcAddr, exData.destAddr, srcAmount, exData.destAmount)); } /// @notice Takes a feePercentage and sends it to wallet /// @param _amount Dai amount of the whole trade /// @param _token Address of the token /// @return feeAmount Amount in Dai owner earned on the fee function getFee(uint256 _amount, address _token) internal returns (uint256 feeAmount) { uint256 fee = SERVICE_FEE; if (Discount(DISCOUNT_ADDRESS).isCustomFeeSet(msg.sender)) { fee = Discount(DISCOUNT_ADDRESS).getCustomServiceFee(msg.sender); } if (fee == 0) { feeAmount = 0; } else { feeAmount = _amount / fee; if (_token == KYBER_ETH_ADDRESS) { WALLET_ID.transfer(feeAmount); } else { ERC20(_token).safeTransfer(WALLET_ID, feeAmount); } } } /// @notice Changes the amount of gas token we burn for each call /// @dev Only callable by the owner /// @param _newBurnAmount New amount of gas tokens to be burned function changeBurnAmount(uint _newBurnAmount) public { require(owner == msg.sender); burnAmount = _newBurnAmount; } } contract MCDSaverFlashLoan is MCDSaverProxy, AdminAuth, FlashLoanReceiverBase { ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public {} struct SaverData { uint cdpId; uint gasCost; uint loanAmount; uint fee; address joinAddr; } function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { //check the contract has the specified balance require(_amount <= getBalanceInternal(address(this), _reserve), "Invalid balance for the contract"); ( bytes memory exDataBytes, uint cdpId, uint gasCost, address joinAddr, bool isRepay ) = abi.decode(_params, (bytes,uint256,uint256,address,bool)); ExchangeData memory exchangeData = unpackExchangeData(exDataBytes); SaverData memory saverData = SaverData({ cdpId: cdpId, gasCost: gasCost, loanAmount: _amount, fee: _fee, joinAddr: joinAddr }); if (isRepay) { repayWithLoan(exchangeData, saverData); } else { boostWithLoan(exchangeData, saverData); } transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } } function boostWithLoan( ExchangeData memory _exchangeData, SaverData memory _saverData ) internal { address user = getOwner(manager, _saverData.cdpId); // Draw users Dai uint maxDebt = getMaxDebt(_saverData.cdpId, manager.ilks(_saverData.cdpId)); uint daiDrawn = drawDai(_saverData.cdpId, manager.ilks(_saverData.cdpId), maxDebt); // Calc. fees uint dsfFee = getFee((daiDrawn + _saverData.loanAmount), _saverData.gasCost, user); uint afterFee = (daiDrawn + _saverData.loanAmount) - dsfFee; // Swap _exchangeData.srcAmount = afterFee; (, uint swapedAmount) = _sell(_exchangeData); // Return collateral addCollateral(_saverData.cdpId, _saverData.joinAddr, swapedAmount); // Draw Dai to repay the flash loan drawDai(_saverData.cdpId, manager.ilks(_saverData.cdpId), (_saverData.loanAmount + _saverData.fee)); logger.Log(address(this), msg.sender, "MCDFlashBoost", abi.encode(_saverData.cdpId, owner, _exchangeData.srcAmount, swapedAmount)); } function repayWithLoan( ExchangeData memory _exchangeData, SaverData memory _saverData ) internal { address user = getOwner(manager, _saverData.cdpId); bytes32 ilk = manager.ilks(_saverData.cdpId); // Draw collateral uint maxColl = getMaxCollateral(_saverData.cdpId, ilk, _saverData.joinAddr); uint collDrawn = drawCollateral(_saverData.cdpId, _saverData.joinAddr, maxColl); // Swap _exchangeData.srcAmount = (_saverData.loanAmount + collDrawn); (, uint swapedAmount) = _sell(_exchangeData); uint paybackAmount = (swapedAmount - getFee(swapedAmount, _saverData.gasCost, user)); paybackAmount = limitLoanAmount(_saverData.cdpId, ilk, paybackAmount, user); // Payback the debt paybackDebt(_saverData.cdpId, ilk, paybackAmount, user); // Draw collateral to repay the flash loan drawCollateral(_saverData.cdpId, _saverData.joinAddr, (_saverData.loanAmount + _saverData.fee)); logger.Log(address(this), msg.sender, "MCDFlashRepay", abi.encode(_saverData.cdpId, owner, _exchangeData.srcAmount, swapedAmount)); } /// @notice Handles that the amount is not bigger than cdp debt and not dust function limitLoanAmount(uint _cdpId, bytes32 _ilk, uint _paybackAmount, address _owner) internal returns (uint256) { uint debt = getAllDebt(address(vat), manager.urns(_cdpId), manager.urns(_cdpId), _ilk); if (_paybackAmount > debt) { ERC20(DAI_ADDRESS).transfer(_owner, (_paybackAmount - debt)); return debt; } uint debtLeft = debt - _paybackAmount; (,,,, uint dust) = vat.ilks(_ilk); dust = dust / 10**27; // Less than dust value if (debtLeft < dust) { uint amountOverDust = (dust - debtLeft); ERC20(DAI_ADDRESS).transfer(_owner, amountOverDust); return (_paybackAmount - amountOverDust); } return _paybackAmount; } receive() external override(FlashLoanReceiverBase, SaverExchangeCore) payable {} } contract CompoundFlashLoanTaker is CompoundSaverProxy, ProxyPermission, GasBurner { ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); address payable public constant COMPOUND_SAVER_FLASH_LOAN = 0xBD3140131dEd4426694257411d564791Cc36D382; /// @notice Repays the position with it's own fund or with FL if needed /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress, exchangeAddress] /// @param _gasCost Gas cost for specific transaction function repayWithLoan( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost ) public payable burnGas(25) { uint maxColl = getMaxCollateral(_cAddresses[0], address(this)); if (_exData.srcAmount <= maxColl) { repay(_exData, _cAddresses, _gasCost); } else { // 0x fee COMPOUND_SAVER_FLASH_LOAN.transfer(msg.value); uint loanAmount = (_exData.srcAmount - maxColl); bytes memory encoded = packExchangeData(_exData); bytes memory paramsData = abi.encode(encoded, _cAddresses, _gasCost, true, address(this)); givePermission(COMPOUND_SAVER_FLASH_LOAN); lendingPool.flashLoan(COMPOUND_SAVER_FLASH_LOAN, getUnderlyingAddr(_cAddresses[0]), loanAmount, paramsData); removePermission(COMPOUND_SAVER_FLASH_LOAN); logger.Log(address(this), msg.sender, "CompoundFlashRepay", abi.encode(loanAmount, _exData.srcAmount, _cAddresses[0])); } } /// @notice Boosts the position with it's own fund or with FL if needed /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress, exchangeAddress] /// @param _gasCost Gas cost for specific transaction function boostWithLoan( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost ) public payable burnGas(20) { uint maxBorrow = getMaxBorrow(_cAddresses[1], address(this)); if (_exData.srcAmount <= maxBorrow) { boost(_exData, _cAddresses, _gasCost); } else { // 0x fee COMPOUND_SAVER_FLASH_LOAN.transfer(msg.value); uint loanAmount = (_exData.srcAmount - maxBorrow); bytes memory paramsData = abi.encode(packExchangeData(_exData), _cAddresses, _gasCost, false, address(this)); givePermission(COMPOUND_SAVER_FLASH_LOAN); lendingPool.flashLoan(COMPOUND_SAVER_FLASH_LOAN, getUnderlyingAddr(_cAddresses[1]), loanAmount, paramsData); removePermission(COMPOUND_SAVER_FLASH_LOAN); logger.Log(address(this), msg.sender, "CompoundFlashBoost", abi.encode(loanAmount, _exData.srcAmount, _cAddresses[1])); } } }

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

{"success": true, "error": null, "results": {"detectors": [{"check": "name-reused", "impact": "High", "confidence": "High"}, {"check": "erc20-interface", "impact": "Medium", "confidence": "High"}, {"check": "arbitrary-send", "impact": "High", "confidence": "Medium"}, {"check": "unchecked-lowlevel", "impact": "Medium", "confidence": "Medium"}, {"check": "incorrect-equality", "impact": "Medium", "confidence": "High"}, {"check": "uninitialized-local", "impact": "Medium", "confidence": "Medium"}, {"check": "unchecked-transfer", "impact": "High", "confidence": "Medium"}, {"check": "unused-return", "impact": "Medium", "confidence": "Medium"}, {"check": "locked-ether", "impact": "Medium", "confidence": "High"}]}}

0x77ef0bb9a12aaf29a086a7884c04bf02f5a2a0d1

pragma solidity 0.6.5; pragma experimental ABIEncoderV2; interface ERC20 { function approve(address, uint256) external returns (bool); function transfer(address, uint256) external returns (bool); function transferFrom(address, address, uint256) external returns (bool); function name() external view returns (string memory); function symbol() external view returns (string memory); function decimals() external view returns (uint8); function totalSupply() external view returns (uint256); function balanceOf(address) external view returns (uint256); } interface ProtocolAdapter { /** * @dev MUST return "Asset" or "Debt". * SHOULD be implemented by the public constant state variable. */ function adapterType() external pure returns (string memory); /** * @dev MUST return token type (default is "ERC20"). * SHOULD be implemented by the public constant state variable. */ function tokenType() external pure returns (string memory); /** * @dev MUST return amount of the given token locked on the protocol by the given account. */ function getBalance(address token, address account) external view returns (uint256); } interface StakingRewards { function earned(address) external view returns (uint256); } contract PieDAOStakingAdapter is ProtocolAdapter { string public constant override adapterType = "Asset"; string public constant override tokenType = "ERC20"; address internal constant DOUGH = 0xad32A8e6220741182940c5aBF610bDE99E737b2D; address internal constant BALANCER_ETH_20_DOUGH_80 = 0xFAE2809935233d4BfE8a56c2355c4A2e7d1fFf1A; address internal constant UNISWAP_DAI_DEFI = 0x7aeFaF3ea1b465dd01561B0548c9FD969e3F76BA; address internal constant BALANCER_DEFI_70_ETH_30 = 0x35333CF3Db8e334384EC6D2ea446DA6e445701dF; address internal constant BALANCER_ETH_20_DOUGH_80_POOL = 0x8314337d2b13e1A61EadF0FD1686b2134D43762F; address internal constant UNISWAP_DAI_DEFI_POOL = 0x64964cb69f40A1B56AF76e32Eb5BF2e2E52a747c; address internal constant BALANCER_DEFI_70_ETH_30_POOL = 0x220f25C2105a65425913FE0CF38e7699E3992B97; /** * @return Amount of staked LP tokens for a given account. * @dev Implementation of ProtocolAdapter interface function. */ function getBalance(address token, address account) external view override returns (uint256) { if (token == DOUGH) { uint256 totalBalance = 0; totalBalance += StakingRewards(BALANCER_ETH_20_DOUGH_80_POOL).earned(account); totalBalance += StakingRewards(UNISWAP_DAI_DEFI_POOL).earned(account); totalBalance += StakingRewards(BALANCER_DEFI_70_ETH_30_POOL).earned(account); return totalBalance; } else if (token == BALANCER_ETH_20_DOUGH_80) { return ERC20(BALANCER_ETH_20_DOUGH_80_POOL).balanceOf(account); } else if (token == UNISWAP_DAI_DEFI) { return ERC20(UNISWAP_DAI_DEFI_POOL).balanceOf(account); } else if (token == BALANCER_DEFI_70_ETH_30) { return ERC20(BALANCER_DEFI_70_ETH_30_POOL).balanceOf(account); } else { return 0; } } }

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{"success": true, "error": null, "results": {}}

0x7858d90af34c0ecf085d5bed4581047d9a7d9495

pragma solidity 0.6.6; library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // This method relies in extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. uint256 size; // solhint-disable-next-line no-inline-assembly assembly { size := extcodesize(account) } return size > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain`call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return _functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); return _functionCallWithValue(target, data, value, errorMessage); } function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) { require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: weiValue }(data); if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } abstract contract Context { function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } library EnumerableSet { // To implement this library for multiple types with as little code // repetition as possible, we write it in terms of a generic Set type with // bytes32 values. // The Set implementation uses private functions, and user-facing // implementations (such as AddressSet) are just wrappers around the // underlying Set. // This means that we can only create new EnumerableSets for types that fit // in bytes32. struct Set { // Storage of set values bytes32[] _values; // Position of the value in the `values` array, plus 1 because index 0 // means a value is not in the set. mapping (bytes32 => uint256) _indexes; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function _add(Set storage set, bytes32 value) private returns (bool) { if (!_contains(set, value)) { set._values.push(value); // The value is stored at length-1, but we add 1 to all indexes // and use 0 as a sentinel value set._indexes[value] = set._values.length; return true; } else { return false; } } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function _remove(Set storage set, bytes32 value) private returns (bool) { // We read and store the value's index to prevent multiple reads from the same storage slot uint256 valueIndex = set._indexes[value]; if (valueIndex != 0) { // Equivalent to contains(set, value) // To delete an element from the _values array in O(1), we swap the element to delete with the last one in // the array, and then remove the last element (sometimes called as 'swap and pop'). // This modifies the order of the array, as noted in {at}. uint256 toDeleteIndex = valueIndex - 1; uint256 lastIndex = set._values.length - 1; // When the value to delete is the last one, the swap operation is unnecessary. However, since this occurs // so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement. bytes32 lastvalue = set._values[lastIndex]; // Move the last value to the index where the value to delete is set._values[toDeleteIndex] = lastvalue; // Update the index for the moved value set._indexes[lastvalue] = toDeleteIndex + 1; // All indexes are 1-based // Delete the slot where the moved value was stored set._values.pop(); // Delete the index for the deleted slot delete set._indexes[value]; return true; } else { return false; } } /** * @dev Returns true if the value is in the set. O(1). */ function _contains(Set storage set, bytes32 value) private view returns (bool) { return set._indexes[value] != 0; } /** * @dev Returns the number of values on the set. O(1). */ function _length(Set storage set) private view returns (uint256) { return set._values.length; } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function _at(Set storage set, uint256 index) private view returns (bytes32) { require(set._values.length > index, "EnumerableSet: index out of bounds"); return set._values[index]; } // AddressSet struct AddressSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(AddressSet storage set, address value) internal returns (bool) { return _add(set._inner, bytes32(uint256(value))); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(AddressSet storage set, address value) internal returns (bool) { return _remove(set._inner, bytes32(uint256(value))); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(AddressSet storage set, address value) internal view returns (bool) { return _contains(set._inner, bytes32(uint256(value))); } /** * @dev Returns the number of values in the set. O(1). */ function length(AddressSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(AddressSet storage set, uint256 index) internal view returns (address) { return address(uint256(_at(set._inner, index))); } // UintSet struct UintSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(UintSet storage set, uint256 value) internal returns (bool) { return _add(set._inner, bytes32(value)); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(UintSet storage set, uint256 value) internal returns (bool) { return _remove(set._inner, bytes32(value)); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(UintSet storage set, uint256 value) internal view returns (bool) { return _contains(set._inner, bytes32(value)); } /** * @dev Returns the number of values on the set. O(1). */ function length(UintSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(UintSet storage set, uint256 index) internal view returns (uint256) { return uint256(_at(set._inner, index)); } } interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor () internal { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), msgSender); } /** * @dev Returns the address of the current owner. */ function owner() public view returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(_owner == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { emit OwnershipTransferred(_owner, address(0)); _owner = address(0); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } } contract PEPEChef is Ownable { using SafeMath for uint256; using SafeERC20 for IERC20; // Info of each user. struct UserInfo { uint256 amount; // How many LP tokens the user has provided. uint256 rewardDebt; // Reward debt. See explanation below. // // We do some fancy math here. Basically, any point in time, the amount of PEPEs // entitled to a user but is pending to be distributed is: // // pending reward = (user.amount * pool.accPEPEPerShare) - user.rewardDebt // // Whenever a user deposits or withdraws LP tokens to a pool. Here's what happens: // 1. The pool's `accPEPEPerShare` (and `lastRewardBlock`) gets updated. // 2. User receives the pending reward sent to his/her address. // 3. User's `amount` gets updated. // 4. User's `rewardDebt` gets updated. } // Info of each pool. struct PoolInfo { IERC20 lpToken; // Address of LP token contract. uint256 allocPoint; // How many allocation points assigned to this pool. PEPEs to distribute per block. uint256 lastRewardBlock; // Last block number that PEPEs distribution occurs. uint256 accPEPEPerShare; // Accumulated PEPEs per share, times 1e12. See below. } // The PEPE TOKEN! PEPEToken public pepe; // Dev address. address public devaddr; // Block number when bonus PEPE period ends. uint256 public bonusEndBlock; // PEPE tokens created per block. uint256 public pepePerBlock; // Bonus muliplier for early pepe makers. uint256 public constant BONUS_MULTIPLIER = 10; // Info of each pool. PoolInfo[] public poolInfo; // Info of each user that stakes LP tokens. mapping(uint256 => mapping(address => UserInfo)) public userInfo; // Total allocation poitns. Must be the sum of all allocation points in all pools. uint256 public totalAllocPoint = 0; // The block number when PEPE mining starts. uint256 public startBlock; event Deposit(address indexed user, uint256 indexed pid, uint256 amount); event Withdraw(address indexed user, uint256 indexed pid, uint256 amount); event EmergencyWithdraw( address indexed user, uint256 indexed pid, uint256 amount ); constructor( PEPEToken _pepe, address _devaddr, uint256 _pepePerBlock, uint256 _startBlock, uint256 _bonusEndBlock ) public { pepe = _pepe; devaddr = _devaddr; pepePerBlock = _pepePerBlock; bonusEndBlock = _bonusEndBlock; startBlock = _startBlock; } function poolLength() external view returns (uint256) { return poolInfo.length; } // Add a new lp to the pool. Can only be called by the owner. // XXX DO NOT add the same LP token more than once. Rewards will be messed up if you do. function add( uint256 _allocPoint, IERC20 _lpToken, bool _withUpdate ) public onlyOwner { if (_withUpdate) { massUpdatePools(); } uint256 lastRewardBlock = block.number > startBlock ? block.number : startBlock; totalAllocPoint = totalAllocPoint.add(_allocPoint); poolInfo.push( PoolInfo({ lpToken: _lpToken, allocPoint: _allocPoint, lastRewardBlock: lastRewardBlock, accPEPEPerShare: 0 }) ); } // Update the given pool's PEPE allocation point. Can only be called by the owner. function set( uint256 _pid, uint256 _allocPoint, bool _withUpdate ) public onlyOwner { if (_withUpdate) { massUpdatePools(); } totalAllocPoint = totalAllocPoint.sub(poolInfo[_pid].allocPoint).add( _allocPoint ); poolInfo[_pid].allocPoint = _allocPoint; } // Return reward multiplier over the given _from to _to block. function getMultiplier(uint256 _from, uint256 _to) public view returns (uint256) { if (_to <= bonusEndBlock) { return _to.sub(_from).mul(BONUS_MULTIPLIER); } else if (_from >= bonusEndBlock) { return _to.sub(_from); } else { return bonusEndBlock.sub(_from).mul(BONUS_MULTIPLIER).add( _to.sub(bonusEndBlock) ); } } // View function to see pending PEPEs on frontend. function pendingPEPE(uint256 _pid, address _user) external view returns (uint256) { PoolInfo storage pool = poolInfo[_pid]; UserInfo storage user = userInfo[_pid][_user]; uint256 accPEPEPerShare = pool.accPEPEPerShare; uint256 lpSupply = pool.lpToken.balanceOf(address(this)); if (block.number > pool.lastRewardBlock && lpSupply != 0) { uint256 multiplier = getMultiplier( pool.lastRewardBlock, block.number ); uint256 pepeReward = multiplier .mul(pepePerBlock) .mul(pool.allocPoint) .div(totalAllocPoint); accPEPEPerShare = accPEPEPerShare.add( pepeReward.mul(1e12).div(lpSupply) ); } return user.amount.mul(accPEPEPerShare).div(1e12).sub(user.rewardDebt); } // Update reward vairables for all pools. Be careful of gas spending! function massUpdatePools() public { uint256 length = poolInfo.length; for (uint256 pid = 0; pid < length; ++pid) { updatePool(pid); } } // Update reward variables of the given pool to be up-to-date. function updatePool(uint256 _pid) public { PoolInfo storage pool = poolInfo[_pid]; if (block.number <= pool.lastRewardBlock) { return; } uint256 lpSupply = pool.lpToken.balanceOf(address(this)); if (lpSupply == 0) { pool.lastRewardBlock = block.number; return; } uint256 multiplier = getMultiplier(pool.lastRewardBlock, block.number); uint256 pepeReward = multiplier .mul(pepePerBlock) .mul(pool.allocPoint) .div(totalAllocPoint); pepe.mint(devaddr, pepeReward.div(25)); pepe.mint(address(this), pepeReward); pool.accPEPEPerShare = pool.accPEPEPerShare.add( pepeReward.mul(1e12).div(lpSupply) ); pool.lastRewardBlock = block.number; } // Deposit LP tokens to PEPEChef for PEPE allocation. function deposit(uint256 _pid, uint256 _amount) public { PoolInfo storage pool = poolInfo[_pid]; UserInfo storage user = userInfo[_pid][msg.sender]; updatePool(_pid); if (user.amount > 0) { uint256 pending = user .amount .mul(pool.accPEPEPerShare) .div(1e12) .sub(user.rewardDebt); safePEPETransfer(msg.sender, pending); } pool.lpToken.safeTransferFrom( address(msg.sender), address(this), _amount ); user.amount = user.amount.add(_amount); user.rewardDebt = user.amount.mul(pool.accPEPEPerShare).div(1e12); emit Deposit(msg.sender, _pid, _amount); } // Withdraw LP tokens from PEPEChef. function withdraw(uint256 _pid, uint256 _amount) public { PoolInfo storage pool = poolInfo[_pid]; UserInfo storage user = userInfo[_pid][msg.sender]; require(user.amount >= _amount, "withdraw: not good"); updatePool(_pid); uint256 pending = user.amount.mul(pool.accPEPEPerShare).div(1e12).sub( user.rewardDebt ); safePEPETransfer(msg.sender, pending); user.amount = user.amount.sub(_amount); user.rewardDebt = user.amount.mul(pool.accPEPEPerShare).div(1e12); pool.lpToken.safeTransfer(address(msg.sender), _amount); emit Withdraw(msg.sender, _pid, _amount); } // Withdraw without caring about rewards. EMERGENCY ONLY. function emergencyWithdraw(uint256 _pid) public { PoolInfo storage pool = poolInfo[_pid]; UserInfo storage user = userInfo[_pid][msg.sender]; pool.lpToken.safeTransfer(address(msg.sender), user.amount); emit EmergencyWithdraw(msg.sender, _pid, user.amount); user.amount = 0; user.rewardDebt = 0; } // Safe pepe transfer function, just in case if rounding error causes pool to not have enough PEPEs. function safePEPETransfer(address _to, uint256 _amount) internal { uint256 pepeBal = pepe.balanceOf(address(this)); if (_amount > pepeBal) { pepe.transfer(_to, pepeBal); } else { pepe.transfer(_to, _amount); } } // Update dev address by the previous dev. function dev(address _devaddr) public { require(msg.sender == devaddr, "dev: wut?"); devaddr = _devaddr; } } library SafeERC20 { using SafeMath for uint256; using Address for address; function safeTransfer(IERC20 token, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value)); } /** * @dev Deprecated. This function has issues similar to the ones found in * {IERC20-approve}, and its usage is discouraged. * * Whenever possible, use {safeIncreaseAllowance} and * {safeDecreaseAllowance} instead. */ function safeApprove(IERC20 token, address spender, uint256 value) internal { // safeApprove should only be called when setting an initial allowance, // or when resetting it to zero. To increase and decrease it, use // 'safeIncreaseAllowance' and 'safeDecreaseAllowance' // solhint-disable-next-line max-line-length require((value == 0) || (token.allowance(address(this), spender) == 0), "SafeERC20: approve from non-zero to non-zero allowance" ); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value)); } function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).add(value); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero"); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). */ function _callOptionalReturn(IERC20 token, bytes memory data) private { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that // the target address contains contract code and also asserts for success in the low-level call. bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed"); if (returndata.length > 0) { // Return data is optional // solhint-disable-next-line max-line-length require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } } } library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } contract ERC20 is Context, IERC20 { using SafeMath for uint256; using Address for address; mapping (address => uint256) private _balances; mapping (address => mapping (address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; uint8 private _decimals; /** * @dev Sets the values for {name} and {symbol}, initializes {decimals} with * a default value of 18. * * To select a different value for {decimals}, use {_setupDecimals}. * * All three of these values are immutable: they can only be set once during * construction. */ constructor (string memory name, string memory symbol) public { _name = name; _symbol = symbol; _decimals = 18; } /** * @dev Returns the name of the token. */ function name() public view returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5,05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is * called. * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view returns (uint8) { return _decimals; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `recipient` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address recipient, uint256 amount) public virtual override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { _approve(_msgSender(), spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}; * * Requirements: * - `sender` and `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. * - the caller must have allowance for ``sender``'s tokens of at least * `amount`. */ function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) { _transfer(sender, recipient, amount); _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance")); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue)); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero")); return true; } /** * @dev Moves tokens `amount` from `sender` to `recipient`. * * This is internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `sender` cannot be the zero address. * - `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. */ function _transfer(address sender, address recipient, uint256 amount) internal virtual { require(sender != address(0), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(sender, recipient, amount); _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance"); _balances[recipient] = _balances[recipient].add(amount); emit Transfer(sender, recipient, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements * * - `to` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply = _totalSupply.add(amount); _balances[account] = _balances[account].add(amount); emit Transfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance"); _totalSupply = _totalSupply.sub(amount); emit Transfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens. * * This is internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve(address owner, address spender, uint256 amount) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Sets {decimals} to a value other than the default one of 18. * * WARNING: This function should only be called from the constructor. Most * applications that interact with token contracts will not expect * {decimals} to ever change, and may work incorrectly if it does. */ function _setupDecimals(uint8 decimals_) internal { _decimals = decimals_; } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be to transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { } } contract PEPEToken is ERC20("PEPEFinance", "PEPE"), Ownable { /// @notice Creates `_amount` token to `_to`. Must only be called by the owner (PEPEFrog). function mint(address _to, uint256 _amount) public onlyOwner { _mint(_to, _amount); } }

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{"success": true, "error": null, "results": {"detectors": [{"check": "unchecked-transfer", "impact": "High", "confidence": "Medium"}, {"check": "divide-before-multiply", "impact": "Medium", "confidence": "Medium"}, {"check": "incorrect-equality", "impact": "Medium", "confidence": "High"}, {"check": "reentrancy-no-eth", "impact": "Medium", "confidence": "Medium"}]}}

0x786b28a9112aa8e9646cc22bda116780e7168ee4

pragma solidity 0.6.2; library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // According to EIP-1052, 0x0 is the value returned for not-yet created accounts // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned // for accounts without code, i.e. `keccak256('')` bytes32 codehash; bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470; // solhint-disable-next-line no-inline-assembly assembly { codehash := extcodehash(account) } return (codehash != accountHash && codehash != 0x0); } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain`call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return _functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); return _functionCallWithValue(target, data, value, errorMessage); } function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) { require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: weiValue }(data); if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } contract Context { // Empty internal constructor, to prevent people from mistakenly deploying // an instance of this contract, which should be used via inheritance. constructor () internal { } function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } contract Migrations { address public owner; uint public last_completed_migration; constructor() public { owner = msg.sender; } modifier restricted() { if (msg.sender == owner) _; } function setCompleted(uint completed) public restricted { last_completed_migration = completed; } } contract ERC20 is Context, IERC20 { using SafeMath for uint256; using Address for address; mapping (address => uint256) private _balances; mapping (address => mapping (address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; uint8 private _decimals; address public _owner; /** * @dev Sets the values for {name} and {symbol}, initializes {decimals} with * a default value of 18. * * To select a different value for {decimals}, use {_setupDecimals}. * * All three of these values are immutable: they can only be set once during * construction. */ constructor (string memory name, string memory symbol, uint256 initialSupply,address payable owner) public { _name = name; _symbol = symbol; _decimals = 18; _owner = owner; _mint(_owner, initialSupply); } /** * @dev Returns the name of the token. */ function name() public view returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5,05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is * called. * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view returns (uint8) { return _decimals; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `recipient` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address recipient, uint256 amount) public virtual override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { _approve(_msgSender(), spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}; * * Requirements: * - `sender` and `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. * - the caller must have allowance for ``sender``'s tokens of at least * `amount`. */ function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) { _transfer(sender, recipient, amount); _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance")); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue)); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero")); return true; } /** * @dev Moves tokens `amount` from `sender` to `recipient`. * * This is internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `sender` cannot be the zero address. * - `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. */ function _transfer(address sender, address recipient, uint256 amount) internal virtual { require(sender != address(0), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(sender, recipient, amount); _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance"); _balances[recipient] = _balances[recipient].add(amount); emit Transfer(sender, recipient, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements * * - `to` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply = _totalSupply.add(amount); _balances[account] = _balances[account].add(amount); emit Transfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance"); _totalSupply = _totalSupply.sub(amount); emit Transfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens. * * This is internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve(address owner, address spender, uint256 amount) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Sets {decimals} to a value other than the default one of 18. * * WARNING: This function should only be called from the constructor. Most * applications that interact with token contracts will not expect * {decimals} to ever change, and may work incorrectly if it does. */ function _setupDecimals(uint8 decimals_) internal { _decimals = decimals_; } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be to transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { } } library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot overflow. * * _Available since v2.4.0._ */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. * * _Available since v2.4.0._ */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { // Solidity only automatically asserts when dividing by 0 require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. * * _Available since v2.4.0._ */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } }

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0x78969a7baf3d65b2f7bb9bf73ab4133b8ef07272

pragma solidity 0.6.12; pragma experimental ABIEncoderV2; interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } interface sbControllerInterface { function getDayMineSecondsUSDTotal(uint256 day) external view returns (uint256); function getCommunityDayMineSecondsUSD(address community, uint256 day) external view returns (uint256); function getCommunityDayRewards(address community, uint256 day) external view returns (uint256); function getStartDay() external view returns (uint256); function getMaxYears() external view returns (uint256); function getStrongPoolDailyRewards(uint256 day) external view returns (uint256); function communityAccepted(address community) external view returns (bool); function getCommunities() external view returns (address[] memory); function upToDate() external view returns (bool); } contract sbStrongPoolV2 { event ServiceMinMineUpdated(uint256 amount); event MinerMinMineUpdated(uint256 amount); event MinedFor( address indexed miner, address indexed receiver, uint256 amount, uint256 indexed day ); event RewardsReceived(uint256 indexed day, uint256 amount); event Mined(address indexed miner, uint256 amount, uint256 indexed day); event Unmined(address indexed miner, uint256 amount, uint256 indexed day); event MinedForVotesOnly( address indexed miner, uint256 amount, uint256 indexed day ); event UnminedForVotesOnly( address indexed miner, uint256 amount, uint256 indexed day ); event Claimed(address indexed miner, uint256 amount, uint256 indexed day); using SafeMath for uint256; bool internal initDone; IERC20 internal strongToken; sbControllerInterface internal sbController; sbVotesInterface internal sbVotes; address internal sbTimelock; uint256 internal serviceMinMine; uint256 internal minerMinMine; mapping(address => uint256[]) internal minerMineDays; mapping(address => uint256[]) internal minerMineAmounts; mapping(address => uint256[]) internal minerMineMineSeconds; uint256[] internal mineDays; uint256[] internal mineAmounts; uint256[] internal mineMineSeconds; mapping(address => uint256) internal minerDayLastClaimedFor; mapping(uint256 => uint256) internal dayRewards; mapping(address => uint256) internal mineForVotes; address internal superAdmin; address internal pendingSuperAdmin; uint256 internal delayDays; function setSuperAdmin() public { require(superAdmin == address(0), "superAdmin already set"); superAdmin = address(0x4B5057B2c87Ec9e7C047fb00c0E406dfF2FDaCad); } function setPendingSuperAdmin(address newPendingSuperAdmin) public { require( msg.sender == superAdmin && msg.sender != address(0), "not superAdmin" ); pendingSuperAdmin = newPendingSuperAdmin; } function acceptSuperAdmin() public { require( msg.sender == pendingSuperAdmin && msg.sender != address(0), "not pendingSuperAdmin" ); superAdmin = pendingSuperAdmin; pendingSuperAdmin = address(0); } function getSuperAdminAddressUsed() public view returns (address) { return superAdmin; } function getPendingSuperAdminAddressUsed() public view returns (address) { return pendingSuperAdmin; } function setDelayDays(uint256 dayCount) external { require( msg.sender == superAdmin && msg.sender != address(0), "not superAdmin" ); require(dayCount >= 1, "zero"); delayDays = dayCount; } function getDelayDays() public view returns (uint256) { return delayDays; } function serviceMinMined(address miner) external view returns (bool) { uint256 currentDay = _getCurrentDay(); (, uint256 twoDaysAgoMine, ) = _getMinerMineData( miner, currentDay.sub(2) ); (, uint256 oneDayAgoMine, ) = _getMinerMineData( miner, currentDay.sub(1) ); (, uint256 todayMine, ) = _getMinerMineData(miner, currentDay); return twoDaysAgoMine >= serviceMinMine && oneDayAgoMine >= serviceMinMine && todayMine >= serviceMinMine; } function minerMinMined(address miner) external view returns (bool) { (, uint256 todayMine, ) = _getMinerMineData(miner, _getCurrentDay()); return todayMine >= minerMinMine; } function updateServiceMinMine(uint256 serviceMinMineAmount) external { require(serviceMinMineAmount > 0, "zero"); require(msg.sender == sbTimelock, "not sbTimelock"); serviceMinMine = serviceMinMineAmount; emit ServiceMinMineUpdated(serviceMinMineAmount); } function updateMinerMinMine(uint256 minerMinMineAmount) external { require(minerMinMineAmount > 0, "zero"); require(msg.sender == sbTimelock, "not sbTimelock"); minerMinMine = minerMinMineAmount; emit MinerMinMineUpdated(minerMinMineAmount); } function mineFor(address miner, uint256 amount) external { require(amount > 0, "zero"); require(miner != address(0), "zero address"); if (msg.sender != address(this)) { strongToken.transferFrom(msg.sender, address(this), amount); } uint256 currentDay = _getCurrentDay(); uint256 startDay = sbController.getStartDay(); uint256 MAX_YEARS = sbController.getMaxYears(); uint256 year = _getYearDayIsIn(currentDay, startDay); require(year <= MAX_YEARS, "year limit met"); _update( minerMineDays[miner], minerMineAmounts[miner], minerMineMineSeconds[miner], amount, true, currentDay ); _update( mineDays, mineAmounts, mineMineSeconds, amount, true, currentDay ); sbVotes.updateVotes(miner, amount, true); emit MinedFor(msg.sender, miner, amount, currentDay); } function getMineData(uint256 day) external view returns ( uint256, uint256, uint256 ) { return _getMineData(day); } function receiveRewards(uint256 day, uint256 amount) external { require(amount > 0, "zero"); require(msg.sender == address(sbController), "not sbController"); strongToken.transferFrom(address(sbController), address(this), amount); dayRewards[day] = dayRewards[day].add(amount); emit RewardsReceived(day, amount); } function getDayRewards(uint256 day) public view returns (uint256) { require(day <= _getCurrentDay(), "invalid day"); return dayRewards[day]; } function mine(uint256 amount) public { require(amount > 0, "zero"); strongToken.transferFrom(msg.sender, address(this), amount); uint256 currentDay = _getCurrentDay(); uint256 startDay = sbController.getStartDay(); uint256 MAX_YEARS = sbController.getMaxYears(); uint256 year = _getYearDayIsIn(currentDay, startDay); require(year <= MAX_YEARS, "year limit met"); _update( minerMineDays[msg.sender], minerMineAmounts[msg.sender], minerMineMineSeconds[msg.sender], amount, true, currentDay ); _update( mineDays, mineAmounts, mineMineSeconds, amount, true, currentDay ); sbVotes.updateVotes(msg.sender, amount, true); emit Mined(msg.sender, amount, currentDay); } function unmine(uint256 amount) public { require(amount > 0, "zero"); uint256 currentDay = _getCurrentDay(); _update( minerMineDays[msg.sender], minerMineAmounts[msg.sender], minerMineMineSeconds[msg.sender], amount, false, currentDay ); _update( mineDays, mineAmounts, mineMineSeconds, amount, false, currentDay ); sbVotes.updateVotes(msg.sender, amount, false); strongToken.transfer(msg.sender, amount); emit Unmined(msg.sender, amount, currentDay); } function mineForVotesOnly(uint256 amount) public { require(amount > 0, "zero"); strongToken.transferFrom(msg.sender, address(this), amount); uint256 currentDay = _getCurrentDay(); uint256 startDay = sbController.getStartDay(); uint256 MAX_YEARS = sbController.getMaxYears(); uint256 year = _getYearDayIsIn(currentDay, startDay); require(year <= MAX_YEARS, "year limit met"); mineForVotes[msg.sender] = mineForVotes[msg.sender].add(amount); sbVotes.updateVotes(msg.sender, amount, true); emit MinedForVotesOnly(msg.sender, amount, currentDay); } function unmineForVotesOnly(uint256 amount) public { require(amount > 0, "zero"); require(mineForVotes[msg.sender] >= amount, "not enough mine"); mineForVotes[msg.sender] = mineForVotes[msg.sender].sub(amount); sbVotes.updateVotes(msg.sender, amount, false); strongToken.transfer(msg.sender, amount); emit UnminedForVotesOnly(msg.sender, amount, _getCurrentDay()); } function getMineForVotesOnly(address miner) public view returns (uint256) { return mineForVotes[miner]; } function getServiceMinMineAmount() public view returns (uint256) { return serviceMinMine; } function getMinerMinMineAmount() public view returns (uint256) { return minerMinMine; } function getSbControllerAddressUsed() public view returns (address) { return address(sbController); } function getStrongAddressUsed() public view returns (address) { return address(strongToken); } function getSbVotesAddressUsed() public view returns (address) { return address(sbVotes); } function getSbTimelockAddressUsed() public view returns (address) { return sbTimelock; } function getMinerDayLastClaimedFor(address miner) public view returns (uint256) { return minerDayLastClaimedFor[miner] == 0 ? sbController.getStartDay().sub(1) : minerDayLastClaimedFor[miner]; } function claimAll() public { require(delayDays > 0, "zero"); uint256 currentDay = _getCurrentDay(); uint256 dayLastClaimedFor = minerDayLastClaimedFor[msg.sender] == 0 ? sbController.getStartDay().sub(1) : minerDayLastClaimedFor[msg.sender]; require( currentDay > dayLastClaimedFor.add(delayDays), "already claimed" ); require(sbController.upToDate(), "need rewards released"); _claim(currentDay, msg.sender, dayLastClaimedFor); } function claimUpTo(uint256 day) public { require(delayDays > 0, "zero"); require(day <= _getCurrentDay(), "invalid day"); uint256 dayLastClaimedFor = minerDayLastClaimedFor[msg.sender] == 0 ? sbController.getStartDay().sub(1) : minerDayLastClaimedFor[msg.sender]; require(day > dayLastClaimedFor.add(delayDays), "already claimed"); require(sbController.upToDate(), "need rewards released"); _claim(day, msg.sender, dayLastClaimedFor); } function getRewardsDueAll(address miner) public view returns (uint256) { require(delayDays > 0, "zero"); uint256 currentDay = _getCurrentDay(); uint256 dayLastClaimedFor = minerDayLastClaimedFor[miner] == 0 ? sbController.getStartDay().sub(1) : minerDayLastClaimedFor[miner]; if (!(currentDay > dayLastClaimedFor.add(delayDays))) { return 0; } require(sbController.upToDate(), "need rewards released"); return _getRewardsDue(currentDay, miner, dayLastClaimedFor); } function getRewardsDueUpTo(uint256 day, address miner) public view returns (uint256) { require(delayDays > 0, "zero"); require(day <= _getCurrentDay(), "invalid day"); uint256 dayLastClaimedFor = minerDayLastClaimedFor[miner] == 0 ? sbController.getStartDay().sub(1) : minerDayLastClaimedFor[miner]; if (!(day > dayLastClaimedFor.add(delayDays))) { return 0; } require(sbController.upToDate(), "need rewards released"); return _getRewardsDue(day, miner, dayLastClaimedFor); } function getMinerMineData(address miner, uint256 day) public view returns ( uint256, uint256, uint256 ) { return _getMinerMineData(miner, day); } function _getMineData(uint256 day) internal view returns ( uint256, uint256, uint256 ) { return _get(mineDays, mineAmounts, mineMineSeconds, day); } function _getMinerMineData(address miner, uint256 day) internal view returns ( uint256, uint256, uint256 ) { uint256[] memory _Days = minerMineDays[miner]; uint256[] memory _Amounts = minerMineAmounts[miner]; uint256[] memory _UnitSeconds = minerMineMineSeconds[miner]; return _get(_Days, _Amounts, _UnitSeconds, day); } function _get( uint256[] memory _Days, uint256[] memory _Amounts, uint256[] memory _UnitSeconds, uint256 day ) internal pure returns ( uint256, uint256, uint256 ) { uint256 len = _Days.length; if (len == 0) { return (day, 0, 0); } if (day < _Days[0]) { return (day, 0, 0); } uint256 lastIndex = len.sub(1); uint256 lastMinedDay = _Days[lastIndex]; if (day == lastMinedDay) { return (day, _Amounts[lastIndex], _UnitSeconds[lastIndex]); } else if (day > lastMinedDay) { return (day, _Amounts[lastIndex], _Amounts[lastIndex].mul(1 days)); } return _find(_Days, _Amounts, _UnitSeconds, day); } function _find( uint256[] memory _Days, uint256[] memory _Amounts, uint256[] memory _UnitSeconds, uint256 day ) internal pure returns ( uint256, uint256, uint256 ) { uint256 left = 0; uint256 right = _Days.length.sub(1); uint256 middle = right.add(left).div(2); while (left < right) { if (_Days[middle] == day) { return (day, _Amounts[middle], _UnitSeconds[middle]); } else if (_Days[middle] > day) { if (middle > 0 && _Days[middle.sub(1)] < day) { return ( day, _Amounts[middle.sub(1)], _Amounts[middle.sub(1)].mul(1 days) ); } if (middle == 0) { return (day, 0, 0); } right = middle.sub(1); } else if (_Days[middle] < day) { if ( middle < _Days.length.sub(1) && _Days[middle.add(1)] > day ) { return ( day, _Amounts[middle], _Amounts[middle].mul(1 days) ); } left = middle.add(1); } middle = right.add(left).div(2); } if (_Days[middle] != day) { return (day, 0, 0); } else { return (day, _Amounts[middle], _UnitSeconds[middle]); } } function _update( uint256[] storage _Days, uint256[] storage _Amounts, uint256[] storage _UnitSeconds, uint256 amount, bool adding, uint256 currentDay ) internal { uint256 len = _Days.length; uint256 secondsInADay = 1 days; uint256 secondsSinceStartOfDay = block.timestamp % secondsInADay; uint256 secondsUntilEndOfDay = secondsInADay.sub( secondsSinceStartOfDay ); if (len == 0) { if (adding) { _Days.push(currentDay); _Amounts.push(amount); _UnitSeconds.push(amount.mul(secondsUntilEndOfDay)); } else { require(false, "1: not enough mine"); } } else { uint256 lastIndex = len.sub(1); uint256 lastMinedDay = _Days[lastIndex]; uint256 lastMinedAmount = _Amounts[lastIndex]; uint256 lastUnitSeconds = _UnitSeconds[lastIndex]; uint256 newAmount; uint256 newUnitSeconds; if (lastMinedDay == currentDay) { if (adding) { newAmount = lastMinedAmount.add(amount); newUnitSeconds = lastUnitSeconds.add( amount.mul(secondsUntilEndOfDay) ); } else { require(lastMinedAmount >= amount, "2: not enough mine"); newAmount = lastMinedAmount.sub(amount); newUnitSeconds = lastUnitSeconds.sub( amount.mul(secondsUntilEndOfDay) ); } _Amounts[lastIndex] = newAmount; _UnitSeconds[lastIndex] = newUnitSeconds; } else { if (adding) { newAmount = lastMinedAmount.add(amount); newUnitSeconds = lastMinedAmount.mul(1 days).add( amount.mul(secondsUntilEndOfDay) ); } else { require(lastMinedAmount >= amount, "3: not enough mine"); newAmount = lastMinedAmount.sub(amount); newUnitSeconds = lastMinedAmount.mul(1 days).sub( amount.mul(secondsUntilEndOfDay) ); } _Days.push(currentDay); _Amounts.push(newAmount); _UnitSeconds.push(newUnitSeconds); } } } function _getCurrentDay() internal view returns (uint256) { return block.timestamp.div(1 days).add(1); } function _claim( uint256 upToDay, address miner, uint256 dayLastClaimedFor ) internal { uint256 rewards = _getRewardsDue(upToDay, miner, dayLastClaimedFor); require(rewards > 0, "no rewards"); minerDayLastClaimedFor[miner] = upToDay.sub(delayDays); this.mineFor(miner, rewards); emit Claimed(miner, rewards, _getCurrentDay()); } function _getRewardsDue( uint256 upToDay, address miner, uint256 dayLastClaimedFor ) internal view returns (uint256) { uint256 rewards; for ( uint256 day = dayLastClaimedFor.add(1); day <= upToDay.sub(delayDays); day++ ) { (, , uint256 minerMineSecondsForDay) = _getMinerMineData( miner, day ); (, , uint256 mineSecondsForDay) = _getMineData(day); if (mineSecondsForDay == 0) { continue; } uint256 strongPoolDayRewards = dayRewards[day]; uint256 amount = strongPoolDayRewards .mul(minerMineSecondsForDay) .div(mineSecondsForDay); rewards = rewards.add(amount); } return rewards; } function _getYearDayIsIn(uint256 day, uint256 startDay) internal pure returns (uint256) { return day.sub(startDay).div(366).add(1); // dividing by 366 makes day 1 and 365 be in year 1 } } interface sbVotesInterface { function getCommunityData(address community, uint256 day) external view returns ( uint256, uint256, uint256 ); function getPriorProposalVotes(address account, uint256 blockNumber) external view returns (uint96); function receiveServiceRewards(uint256 day, uint256 amount) external; function receiveVoterRewards(uint256 day, uint256 amount) external; function updateVotes( address staker, uint256 rawAmount, bool adding ) external; }

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{"success": true, "error": null, "results": {"detectors": [{"check": "uninitialized-state", "impact": "High", "confidence": "High"}, {"check": "weak-prng", "impact": "High", "confidence": "Medium"}, {"check": "incorrect-equality", "impact": "Medium", "confidence": "High"}, {"check": "unchecked-transfer", "impact": "High", "confidence": "Medium"}]}}

0x7918c3b97e09b4dbd3bfdfc45cc367b25d6eab49

pragma solidity 0.7.0; library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // This method relies in extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. uint256 size; // solhint-disable-next-line no-inline-assembly assembly { size := extcodesize(account) } return size > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain`call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return _functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); return _functionCallWithValue(target, data, value, errorMessage); } function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) { require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: weiValue }(data); if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } abstract contract Context { function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } abstract contract ERC20 is Context, IERC20 { using SafeMath for uint256; using Address for address; mapping (address => uint256) private _balances; mapping (address => mapping (address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; uint8 private _decimals; /** * @dev Sets the values for {name} and {symbol}, initializes {decimals} with * a default value of 18. * * To select a different value for {decimals}, use {_setupDecimals}. * * All three of these values are immutable: they can only be set once during * construction. */ constructor (string memory name, string memory symbol,uint8 decimals) { _name = name; _symbol = symbol; _decimals = decimals; } /** * @dev Returns the name of the token. */ function name() public view returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5,05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is * called. * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view returns (uint8) { return _decimals; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `recipient` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address recipient, uint256 amount) public virtual override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { _approve(_msgSender(), spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}; * * Requirements: * - `sender` and `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. * - the caller must have allowance for ``sender``'s tokens of at least * `amount`. */ function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) { _transfer(sender, recipient, amount); _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance")); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue)); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero")); return true; } /** * @dev Moves tokens `amount` from `sender` to `recipient`. * * This is internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `sender` cannot be the zero address. * - `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. */ function _transfer(address sender, address recipient, uint256 amount) internal virtual { require(sender != address(0), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(sender, recipient, amount); _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance"); _balances[recipient] = _balances[recipient].add(amount); emit Transfer(sender, recipient, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements * * - `to` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply = _totalSupply.add(amount); _balances[account] = _balances[account].add(amount); emit Transfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance"); _totalSupply = _totalSupply.sub(amount); emit Transfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens. * * This is internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve(address owner, address spender, uint256 amount) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Sets {decimals} to a value other than the default one of 18. * * WARNING: This function should only be called from the constructor. Most * applications that interact with token contracts will not expect * {decimals} to ever change, and may work incorrectly if it does. */ function _setupDecimals(uint8 decimals_) internal { _decimals = decimals_; } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be to transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { } } contract DefiDao is ERC20 { using SafeMath for uint256; using Address for address; address private _owner; constructor (string memory name, string memory symbol,uint8 decimals, uint256 totalSupply) ERC20(name,symbol,decimals) public { _mint(_msgSender(),totalSupply); } }

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0x796523566b1382473c4f9162ab8601303fb75fe6

pragma solidity 0.6.10; pragma experimental ABIEncoderV2; library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // According to EIP-1052, 0x0 is the value returned for not-yet created accounts // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned // for accounts without code, i.e. `keccak256('')` bytes32 codehash; bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470; // solhint-disable-next-line no-inline-assembly assembly { codehash := extcodehash(account) } return (codehash != accountHash && codehash != 0x0); } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } } library BokkyPooBahsDateTimeLibrary { uint constant SECONDS_PER_DAY = 24 * 60 * 60; uint constant SECONDS_PER_HOUR = 60 * 60; uint constant SECONDS_PER_MINUTE = 60; int constant OFFSET19700101 = 2440588; uint constant DOW_MON = 1; uint constant DOW_TUE = 2; uint constant DOW_WED = 3; uint constant DOW_THU = 4; uint constant DOW_FRI = 5; uint constant DOW_SAT = 6; uint constant DOW_SUN = 7; // ------------------------------------------------------------------------ // Calculate the number of days from 1970/01/01 to year/month/day using // the date conversion algorithm from // http://aa.usno.navy.mil/faq/docs/JD_Formula.php // and subtracting the offset 2440588 so that 1970/01/01 is day 0 // // days = day // - 32075 // + 1461 * (year + 4800 + (month - 14) / 12) / 4 // + 367 * (month - 2 - (month - 14) / 12 * 12) / 12 // - 3 * ((year + 4900 + (month - 14) / 12) / 100) / 4 // - offset // ------------------------------------------------------------------------ function _daysFromDate(uint year, uint month, uint day) internal pure returns (uint _days) { require(year >= 1970); int _year = int(year); int _month = int(month); int _day = int(day); int __days = _day - 32075 + 1461 * (_year + 4800 + (_month - 14) / 12) / 4 + 367 * (_month - 2 - (_month - 14) / 12 * 12) / 12 - 3 * ((_year + 4900 + (_month - 14) / 12) / 100) / 4 - OFFSET19700101; _days = uint(__days); } // ------------------------------------------------------------------------ // Calculate year/month/day from the number of days since 1970/01/01 using // the date conversion algorithm from // http://aa.usno.navy.mil/faq/docs/JD_Formula.php // and adding the offset 2440588 so that 1970/01/01 is day 0 // // int L = days + 68569 + offset // int N = 4 * L / 146097 // L = L - (146097 * N + 3) / 4 // year = 4000 * (L + 1) / 1461001 // L = L - 1461 * year / 4 + 31 // month = 80 * L / 2447 // dd = L - 2447 * month / 80 // L = month / 11 // month = month + 2 - 12 * L // year = 100 * (N - 49) + year + L // ------------------------------------------------------------------------ function _daysToDate(uint _days) internal pure returns (uint year, uint month, uint day) { int __days = int(_days); int L = __days + 68569 + OFFSET19700101; int N = 4 * L / 146097; L = L - (146097 * N + 3) / 4; int _year = 4000 * (L + 1) / 1461001; L = L - 1461 * _year / 4 + 31; int _month = 80 * L / 2447; int _day = L - 2447 * _month / 80; L = _month / 11; _month = _month + 2 - 12 * L; _year = 100 * (N - 49) + _year + L; year = uint(_year); month = uint(_month); day = uint(_day); } function timestampFromDate(uint year, uint month, uint day) internal pure returns (uint timestamp) { timestamp = _daysFromDate(year, month, day) * SECONDS_PER_DAY; } function timestampFromDateTime(uint year, uint month, uint day, uint hour, uint minute, uint second) internal pure returns (uint timestamp) { timestamp = _daysFromDate(year, month, day) * SECONDS_PER_DAY + hour * SECONDS_PER_HOUR + minute * SECONDS_PER_MINUTE + second; } function timestampToDate(uint timestamp) internal pure returns (uint year, uint month, uint day) { (year, month, day) = _daysToDate(timestamp / SECONDS_PER_DAY); } function timestampToDateTime(uint timestamp) internal pure returns (uint year, uint month, uint day, uint hour, uint minute, uint second) { (year, month, day) = _daysToDate(timestamp / SECONDS_PER_DAY); uint secs = timestamp % SECONDS_PER_DAY; hour = secs / SECONDS_PER_HOUR; secs = secs % SECONDS_PER_HOUR; minute = secs / SECONDS_PER_MINUTE; second = secs % SECONDS_PER_MINUTE; } function isValidDate(uint year, uint month, uint day) internal pure returns (bool valid) { if (year >= 1970 && month > 0 && month <= 12) { uint daysInMonth = _getDaysInMonth(year, month); if (day > 0 && day <= daysInMonth) { valid = true; } } } function isValidDateTime(uint year, uint month, uint day, uint hour, uint minute, uint second) internal pure returns (bool valid) { if (isValidDate(year, month, day)) { if (hour < 24 && minute < 60 && second < 60) { valid = true; } } } function isLeapYear(uint timestamp) internal pure returns (bool leapYear) { uint year; uint month; uint day; (year, month, day) = _daysToDate(timestamp / SECONDS_PER_DAY); leapYear = _isLeapYear(year); } function _isLeapYear(uint year) internal pure returns (bool leapYear) { leapYear = ((year % 4 == 0) && (year % 100 != 0)) || (year % 400 == 0); } function isWeekDay(uint timestamp) internal pure returns (bool weekDay) { weekDay = getDayOfWeek(timestamp) <= DOW_FRI; } function isWeekEnd(uint timestamp) internal pure returns (bool weekEnd) { weekEnd = getDayOfWeek(timestamp) >= DOW_SAT; } function getDaysInMonth(uint timestamp) internal pure returns (uint daysInMonth) { uint year; uint month; uint day; (year, month, day) = _daysToDate(timestamp / SECONDS_PER_DAY); daysInMonth = _getDaysInMonth(year, month); } function _getDaysInMonth(uint year, uint month) internal pure returns (uint daysInMonth) { if (month == 1 || month == 3 || month == 5 || month == 7 || month == 8 || month == 10 || month == 12) { daysInMonth = 31; } else if (month != 2) { daysInMonth = 30; } else { daysInMonth = _isLeapYear(year) ? 29 : 28; } } // 1 = Monday, 7 = Sunday function getDayOfWeek(uint timestamp) internal pure returns (uint dayOfWeek) { uint _days = timestamp / SECONDS_PER_DAY; dayOfWeek = (_days + 3) % 7 + 1; } function getYear(uint timestamp) internal pure returns (uint year) { uint month; uint day; (year, month, day) = _daysToDate(timestamp / SECONDS_PER_DAY); } function getMonth(uint timestamp) internal pure returns (uint month) { uint year; uint day; (year, month, day) = _daysToDate(timestamp / SECONDS_PER_DAY); } function getDay(uint timestamp) internal pure returns (uint day) { uint year; uint month; (year, month, day) = _daysToDate(timestamp / SECONDS_PER_DAY); } function getHour(uint timestamp) internal pure returns (uint hour) { uint secs = timestamp % SECONDS_PER_DAY; hour = secs / SECONDS_PER_HOUR; } function getMinute(uint timestamp) internal pure returns (uint minute) { uint secs = timestamp % SECONDS_PER_HOUR; minute = secs / SECONDS_PER_MINUTE; } function getSecond(uint timestamp) internal pure returns (uint second) { second = timestamp % SECONDS_PER_MINUTE; } function addYears(uint timestamp, uint _years) internal pure returns (uint newTimestamp) { uint year; uint month; uint day; (year, month, day) = _daysToDate(timestamp / SECONDS_PER_DAY); year += _years; uint daysInMonth = _getDaysInMonth(year, month); if (day > daysInMonth) { day = daysInMonth; } newTimestamp = _daysFromDate(year, month, day) * SECONDS_PER_DAY + timestamp % SECONDS_PER_DAY; require(newTimestamp >= timestamp); } function addMonths(uint timestamp, uint _months) internal pure returns (uint newTimestamp) { uint year; uint month; uint day; (year, month, day) = _daysToDate(timestamp / SECONDS_PER_DAY); month += _months; year += (month - 1) / 12; month = (month - 1) % 12 + 1; uint daysInMonth = _getDaysInMonth(year, month); if (day > daysInMonth) { day = daysInMonth; } newTimestamp = _daysFromDate(year, month, day) * SECONDS_PER_DAY + timestamp % SECONDS_PER_DAY; require(newTimestamp >= timestamp); } function addDays(uint timestamp, uint _days) internal pure returns (uint newTimestamp) { newTimestamp = timestamp + _days * SECONDS_PER_DAY; require(newTimestamp >= timestamp); } function addHours(uint timestamp, uint _hours) internal pure returns (uint newTimestamp) { newTimestamp = timestamp + _hours * SECONDS_PER_HOUR; require(newTimestamp >= timestamp); } function addMinutes(uint timestamp, uint _minutes) internal pure returns (uint newTimestamp) { newTimestamp = timestamp + _minutes * SECONDS_PER_MINUTE; require(newTimestamp >= timestamp); } function addSeconds(uint timestamp, uint _seconds) internal pure returns (uint newTimestamp) { newTimestamp = timestamp + _seconds; require(newTimestamp >= timestamp); } function subYears(uint timestamp, uint _years) internal pure returns (uint newTimestamp) { uint year; uint month; uint day; (year, month, day) = _daysToDate(timestamp / SECONDS_PER_DAY); year -= _years; uint daysInMonth = _getDaysInMonth(year, month); if (day > daysInMonth) { day = daysInMonth; } newTimestamp = _daysFromDate(year, month, day) * SECONDS_PER_DAY + timestamp % SECONDS_PER_DAY; require(newTimestamp <= timestamp); } function subMonths(uint timestamp, uint _months) internal pure returns (uint newTimestamp) { uint year; uint month; uint day; (year, month, day) = _daysToDate(timestamp / SECONDS_PER_DAY); uint yearMonth = year * 12 + (month - 1) - _months; year = yearMonth / 12; month = yearMonth % 12 + 1; uint daysInMonth = _getDaysInMonth(year, month); if (day > daysInMonth) { day = daysInMonth; } newTimestamp = _daysFromDate(year, month, day) * SECONDS_PER_DAY + timestamp % SECONDS_PER_DAY; require(newTimestamp <= timestamp); } function subDays(uint timestamp, uint _days) internal pure returns (uint newTimestamp) { newTimestamp = timestamp - _days * SECONDS_PER_DAY; require(newTimestamp <= timestamp); } function subHours(uint timestamp, uint _hours) internal pure returns (uint newTimestamp) { newTimestamp = timestamp - _hours * SECONDS_PER_HOUR; require(newTimestamp <= timestamp); } function subMinutes(uint timestamp, uint _minutes) internal pure returns (uint newTimestamp) { newTimestamp = timestamp - _minutes * SECONDS_PER_MINUTE; require(newTimestamp <= timestamp); } function subSeconds(uint timestamp, uint _seconds) internal pure returns (uint newTimestamp) { newTimestamp = timestamp - _seconds; require(newTimestamp <= timestamp); } function diffYears(uint fromTimestamp, uint toTimestamp) internal pure returns (uint _years) { require(fromTimestamp <= toTimestamp); uint fromYear; uint fromMonth; uint fromDay; uint toYear; uint toMonth; uint toDay; (fromYear, fromMonth, fromDay) = _daysToDate(fromTimestamp / SECONDS_PER_DAY); (toYear, toMonth, toDay) = _daysToDate(toTimestamp / SECONDS_PER_DAY); _years = toYear - fromYear; } function diffMonths(uint fromTimestamp, uint toTimestamp) internal pure returns (uint _months) { require(fromTimestamp <= toTimestamp); uint fromYear; uint fromMonth; uint fromDay; uint toYear; uint toMonth; uint toDay; (fromYear, fromMonth, fromDay) = _daysToDate(fromTimestamp / SECONDS_PER_DAY); (toYear, toMonth, toDay) = _daysToDate(toTimestamp / SECONDS_PER_DAY); _months = toYear * 12 + toMonth - fromYear * 12 - fromMonth; } function diffDays(uint fromTimestamp, uint toTimestamp) internal pure returns (uint _days) { require(fromTimestamp <= toTimestamp); _days = (toTimestamp - fromTimestamp) / SECONDS_PER_DAY; } function diffHours(uint fromTimestamp, uint toTimestamp) internal pure returns (uint _hours) { require(fromTimestamp <= toTimestamp); _hours = (toTimestamp - fromTimestamp) / SECONDS_PER_HOUR; } function diffMinutes(uint fromTimestamp, uint toTimestamp) internal pure returns (uint _minutes) { require(fromTimestamp <= toTimestamp); _minutes = (toTimestamp - fromTimestamp) / SECONDS_PER_MINUTE; } function diffSeconds(uint fromTimestamp, uint toTimestamp) internal pure returns (uint _seconds) { require(fromTimestamp <= toTimestamp); _seconds = toTimestamp - fromTimestamp; } } abstract contract Context { function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } contract Decryption { function encrypt(uint256 secretNumber, bytes32 key) external pure returns (bytes32 ciphertext) { return bytes32(secretNumber) ^ key; } function decrypt(bytes32 ciphertext, bytes32 key) external pure returns (uint256 secretNumber) { return uint256(ciphertext ^ key); } } contract ECDH { using SafeMath for uint256; uint256 constant private _GX = 0x79BE667EF9DCBBAC55A06295CE870B07029BFCDB2DCE28D959F2815B16F81798; uint256 constant private _GY = 0x483ADA7726A3C4655DA4FBFC0E1108A8FD17B448A68554199C47D08FFB10D4B8; uint256 constant private _N = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC2F; uint256 constant private _A = 0; function publicKey(uint256 privKey) external pure returns (uint256 qx, uint256 qy) { uint256 x; uint256 y; uint256 z; (x, y, z) = ecMul( privKey, _GX, _GY, 1 ); z = inverse(z); qx = mulmod(x, z, _N); qy = mulmod(y, z, _N); } function deriveKey( uint256 privKey, uint256 pubX, uint256 pubY ) external pure returns (uint256 qx, uint256 qy) { uint256 x; uint256 y; uint256 z; (x, y, z) = ecMul( privKey, pubX, pubY, 1 ); z = inverse(z); qx = mulmod(x, z, _N); qy = mulmod(y, z, _N); } function jAdd( uint256 x1, uint256 z1, uint256 x2, uint256 z2 ) public pure returns (uint256 x3, uint256 z3) { (x3, z3) = (addmod(mulmod(z2, x1, _N), mulmod(x2, z1, _N), _N), mulmod(z1, z2, _N)); } function jSub( uint256 x1, uint256 z1, uint256 x2, uint256 z2 ) public pure returns (uint256 x3, uint256 z3) { (x3, z3) = (addmod(mulmod(z2, x1, _N), mulmod(_N.sub(x2), z1, _N), _N), mulmod(z1, z2, _N)); } function jMul( uint256 x1, uint256 z1, uint256 x2, uint256 z2 ) public pure returns (uint256 x3, uint256 z3) { (x3, z3) = (mulmod(x1, x2, _N), mulmod(z1, z2, _N)); } function jDiv( uint256 x1, uint256 z1, uint256 x2, uint256 z2 ) public pure returns (uint256 x3, uint256 z3) { (x3, z3) = (mulmod(x1, z2, _N), mulmod(z1, x2, _N)); } function inverse(uint256 a) public pure returns (uint256 invA) { uint256 t = 0; uint256 newT = 1; uint256 r = _N; uint256 newR = a; uint256 q; while (newR != 0) { q = r.div(newR); (t, newT) = (newT, addmod(t, (_N.sub(mulmod(q, newT, _N))), _N)); (r, newR) = (newR, r % newR); } return t; } function ecAdd( uint256 x1, uint256 y1, uint256 z1, uint256 x2, uint256 y2, uint256 z2 ) public pure returns (uint256 x3, uint256 y3, uint256 z3) { uint256 ln; uint256 lz; uint256 da; uint256 db; if ((x1 == 0) && (y1 == 0)) { return (x2, y2, z2); } if ((x2 == 0) && (y2 == 0)) { return (x1, y1, z1); } if ((x1 == x2) && (y1 == y2)) { (ln, lz) = jMul(x1, z1, x1, z1); (ln, lz) = jMul(ln,lz,3,1); (ln, lz) = jAdd(ln,lz,_A,1); (da, db) = jMul(y1,z1,2,1); } else { (ln, lz) = jSub(y2,z2,y1,z1); (da, db) = jSub(x2,z2,x1,z1); } (ln, lz) = jDiv(ln,lz,da,db); (x3, da) = jMul(ln,lz,ln,lz); (x3, da) = jSub(x3,da,x1,z1); (x3, da) = jSub(x3,da,x2,z2); (y3, db) = jSub(x1,z1,x3,da); (y3, db) = jMul(y3,db,ln,lz); (y3, db) = jSub(y3,db,y1,z1); if (da != db) { x3 = mulmod(x3, db, _N); y3 = mulmod(y3, da, _N); z3 = mulmod(da, db, _N); } else { z3 = da; } } function ecDouble( uint256 x1, uint256 y1, uint256 z1 ) public pure returns (uint256 x3, uint256 y3, uint256 z3) { (x3, y3, z3) = ecAdd( x1, y1, z1, x1, y1, z1 ); } function ecMul( uint256 d, uint256 x1, uint256 y1, uint256 z1 ) public pure returns (uint256 x3, uint256 y3, uint256 z3) { uint256 remaining = d; uint256 px = x1; uint256 py = y1; uint256 pz = z1; uint256 acx = 0; uint256 acy = 0; uint256 acz = 1; if (d == 0) { return (0, 0, 1); } while (remaining != 0) { if ((remaining & 1) != 0) { (acx, acy, acz) = ecAdd( acx, acy, acz, px, py, pz ); } remaining = remaining.div(2); (px, py, pz) = ecDouble(px, py, pz); } (x3, y3, z3) = (acx, acy, acz); } } library ECDSA { /** * @dev Returns the address that signed a hashed message (`hash`) with * `signature`. This address can then be used for verification purposes. * * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures: * this function rejects them by requiring the `s` value to be in the lower * half order, and the `v` value to be either 27 or 28. * * IMPORTANT: `hash` _must_ be the result of a hash operation for the * verification to be secure: it is possible to craft signatures that * recover to arbitrary addresses for non-hashed data. A safe way to ensure * this is by receiving a hash of the original message (which may otherwise * be too long), and then calling {toEthSignedMessageHash} on it. */ function recover(bytes32 hash, bytes memory signature) internal pure returns (address) { // Check the signature length if (signature.length != 65) { revert("ECDSA: invalid signature length"); } // Divide the signature in r, s and v variables bytes32 r; bytes32 s; uint8 v; // ecrecover takes the signature parameters, and the only way to get them // currently is to use assembly. // solhint-disable-next-line no-inline-assembly assembly { r := mload(add(signature, 0x20)) s := mload(add(signature, 0x40)) v := byte(0, mload(add(signature, 0x60))) } // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines // the valid range for s in (281): 0 < s < secp256k1n ÷ 2 + 1, and for v in (282): v ∈ {27, 28}. Most // signatures from current libraries generate a unique signature with an s-value in the lower half order. // // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept // these malleable signatures as well. if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) { revert("ECDSA: invalid signature 's' value"); } if (v != 27 && v != 28) { revert("ECDSA: invalid signature 'v' value"); } // If the signature is valid (and not malleable), return the signer address address signer = ecrecover(hash, v, r, s); require(signer != address(0), "ECDSA: invalid signature"); return signer; } /** * @dev Returns an Ethereum Signed Message, created from a `hash`. This * replicates the behavior of the * https://github.com/ethereum/wiki/wiki/JSON-RPC#eth_sign[`eth_sign`] * JSON-RPC method. * * See {recover}. */ function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) { // 32 is the length in bytes of hash, // enforced by the type signature above return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash)); } } library EnumerableSet { // To implement this library for multiple types with as little code // repetition as possible, we write it in terms of a generic Set type with // bytes32 values. // The Set implementation uses private functions, and user-facing // implementations (such as AddressSet) are just wrappers around the // underlying Set. // This means that we can only create new EnumerableSets for types that fit // in bytes32. struct Set { // Storage of set values bytes32[] _values; // Position of the value in the `values` array, plus 1 because index 0 // means a value is not in the set. mapping (bytes32 => uint256) _indexes; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function _add(Set storage set, bytes32 value) private returns (bool) { if (!_contains(set, value)) { set._values.push(value); // The value is stored at length-1, but we add 1 to all indexes // and use 0 as a sentinel value set._indexes[value] = set._values.length; return true; } else { return false; } } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function _remove(Set storage set, bytes32 value) private returns (bool) { // We read and store the value's index to prevent multiple reads from the same storage slot uint256 valueIndex = set._indexes[value]; if (valueIndex != 0) { // Equivalent to contains(set, value) // To delete an element from the _values array in O(1), we swap the element to delete with the last one in // the array, and then remove the last element (sometimes called as 'swap and pop'). // This modifies the order of the array, as noted in {at}. uint256 toDeleteIndex = valueIndex - 1; uint256 lastIndex = set._values.length - 1; // When the value to delete is the last one, the swap operation is unnecessary. However, since this occurs // so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement. bytes32 lastvalue = set._values[lastIndex]; // Move the last value to the index where the value to delete is set._values[toDeleteIndex] = lastvalue; // Update the index for the moved value set._indexes[lastvalue] = toDeleteIndex + 1; // All indexes are 1-based // Delete the slot where the moved value was stored set._values.pop(); // Delete the index for the deleted slot delete set._indexes[value]; return true; } else { return false; } } /** * @dev Returns true if the value is in the set. O(1). */ function _contains(Set storage set, bytes32 value) private view returns (bool) { return set._indexes[value] != 0; } /** * @dev Returns the number of values on the set. O(1). */ function _length(Set storage set) private view returns (uint256) { return set._values.length; } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function _at(Set storage set, uint256 index) private view returns (bytes32) { require(set._values.length > index, "EnumerableSet: index out of bounds"); return set._values[index]; } // AddressSet struct AddressSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(AddressSet storage set, address value) internal returns (bool) { return _add(set._inner, bytes32(uint256(value))); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(AddressSet storage set, address value) internal returns (bool) { return _remove(set._inner, bytes32(uint256(value))); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(AddressSet storage set, address value) internal view returns (bool) { return _contains(set._inner, bytes32(uint256(value))); } /** * @dev Returns the number of values in the set. O(1). */ function length(AddressSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(AddressSet storage set, uint256 index) internal view returns (address) { return address(uint256(_at(set._inner, index))); } // UintSet struct UintSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(UintSet storage set, uint256 value) internal returns (bool) { return _add(set._inner, bytes32(value)); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(UintSet storage set, uint256 value) internal returns (bool) { return _remove(set._inner, bytes32(value)); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(UintSet storage set, uint256 value) internal view returns (bool) { return _contains(set._inner, bytes32(value)); } /** * @dev Returns the number of values on the set. O(1). */ function length(UintSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(UintSet storage set, uint256 index) internal view returns (uint256) { return uint256(_at(set._inner, index)); } } library Fp2Operations { using SafeMath for uint; struct Fp2Point { uint a; uint b; } uint constant public P = 21888242871839275222246405745257275088696311157297823662689037894645226208583; function addFp2(Fp2Point memory value1, Fp2Point memory value2) internal pure returns (Fp2Point memory) { return Fp2Point({ a: addmod(value1.a, value2.a, P), b: addmod(value1.b, value2.b, P) }); } function scalarMulFp2(Fp2Point memory value, uint scalar) internal pure returns (Fp2Point memory) { return Fp2Point({ a: mulmod(scalar, value.a, P), b: mulmod(scalar, value.b, P) }); } function minusFp2(Fp2Point memory diminished, Fp2Point memory subtracted) internal pure returns (Fp2Point memory difference) { uint p = P; if (diminished.a >= subtracted.a) { difference.a = addmod(diminished.a, p - (subtracted.a), p); } else { difference.a = p - (addmod(subtracted.a, p - (diminished.a), p)); } if (diminished.b >= subtracted.b) { difference.b = addmod(diminished.b, p - (subtracted.b), p); } else { difference.b = p - (addmod(subtracted.b, p - (diminished.b), p)); } } function mulFp2( Fp2Point memory value1, Fp2Point memory value2 ) internal pure returns (Fp2Point memory result) { uint p = P; Fp2Point memory point = Fp2Point({ a: mulmod(value1.a, value2.a, p), b: mulmod(value1.b, value2.b, p)}); result.a = addmod( point.a, mulmod(p - 1, point.b, p), p); result.b = addmod( mulmod( addmod(value1.a, value1.b, p), addmod(value2.a, value2.b, p), p), p - addmod(point.a, point.b, p), p); } function squaredFp2(Fp2Point memory value) internal pure returns (Fp2Point memory) { uint p = P; uint ab = mulmod(value.a, value.b, p); uint mult = mulmod(addmod(value.a, value.b, p), addmod(value.a, mulmod(p - 1, value.b, p), p), p); return Fp2Point({ a: mult, b: addmod(ab, ab, p) }); } function inverseFp2(Fp2Point memory value) internal view returns (Fp2Point memory result) { uint p = P; uint t0 = mulmod(value.a, value.a, p); uint t1 = mulmod(value.b, value.b, p); uint t2 = mulmod(p - 1, t1, p); if (t0 >= t2) { t2 = addmod(t0, p - t2, p); } else { t2 = p - addmod(t2, p - t0, p); } uint t3 = Precompiled.bigModExp(t2, p - 2, p); result.a = mulmod(value.a, t3, p); result.b = p - mulmod(value.b, t3, p); } function isEqual( Fp2Point memory value1, Fp2Point memory value2 ) internal pure returns (bool) { return value1.a == value2.a && value1.b == value2.b; } } library G2Operations { using SafeMath for uint; using Fp2Operations for Fp2Operations.Fp2Point; struct G2Point { Fp2Operations.Fp2Point x; Fp2Operations.Fp2Point y; } function getTWISTB() internal pure returns (Fp2Operations.Fp2Point memory) { // Current solidity version does not support Constants of non-value type // so we implemented this function return Fp2Operations.Fp2Point({ a: 19485874751759354771024239261021720505790618469301721065564631296452457478373, b: 266929791119991161246907387137283842545076965332900288569378510910307636690 }); } function getG2() internal pure returns (G2Point memory) { // Current solidity version does not support Constants of non-value type // so we implemented this function return G2Point({ x: Fp2Operations.Fp2Point({ a: 10857046999023057135944570762232829481370756359578518086990519993285655852781, b: 11559732032986387107991004021392285783925812861821192530917403151452391805634 }), y: Fp2Operations.Fp2Point({ a: 8495653923123431417604973247489272438418190587263600148770280649306958101930, b: 4082367875863433681332203403145435568316851327593401208105741076214120093531 }) }); } function getG1() internal pure returns (Fp2Operations.Fp2Point memory) { // Current solidity version does not support Constants of non-value type // so we implemented this function return Fp2Operations.Fp2Point({ a: 1, b: 2 }); } function getG2Zero() internal pure returns (G2Point memory) { // Current solidity version does not support Constants of non-value type // so we implemented this function return G2Point({ x: Fp2Operations.Fp2Point({ a: 0, b: 0 }), y: Fp2Operations.Fp2Point({ a: 1, b: 0 }) }); } function isG1Point(uint x, uint y) internal pure returns (bool) { uint p = Fp2Operations.P; return mulmod(y, y, p) == addmod(mulmod(mulmod(x, x, p), x, p), 3, p); } function isG1(Fp2Operations.Fp2Point memory point) internal pure returns (bool) { return isG1Point(point.a, point.b); } function isG2Point(Fp2Operations.Fp2Point memory x, Fp2Operations.Fp2Point memory y) internal pure returns (bool) { if (isG2ZeroPoint(x, y)) { return true; } Fp2Operations.Fp2Point memory squaredY = y.squaredFp2(); Fp2Operations.Fp2Point memory res = squaredY.minusFp2( x.squaredFp2().mulFp2(x) ).minusFp2(getTWISTB()); return res.a == 0 && res.b == 0; } function isG2(G2Point memory value) internal pure returns (bool) { return isG2Point(value.x, value.y); } function isG2ZeroPoint( Fp2Operations.Fp2Point memory x, Fp2Operations.Fp2Point memory y ) internal pure returns (bool) { return x.a == 0 && x.b == 0 && y.a == 1 && y.b == 0; } function isG2Zero(G2Point memory value) internal pure returns (bool) { return value.x.a == 0 && value.x.b == 0 && value.y.a == 1 && value.y.b == 0; // return isG2ZeroPoint(value.x, value.y); } function addG2( G2Point memory value1, G2Point memory value2 ) internal view returns (G2Point memory sum) { if (isG2Zero(value1)) { return value2; } if (isG2Zero(value2)) { return value1; } if (isEqual(value1, value2)) { return doubleG2(value1); } Fp2Operations.Fp2Point memory s = value2.y.minusFp2(value1.y).mulFp2(value2.x.minusFp2(value1.x).inverseFp2()); sum.x = s.squaredFp2().minusFp2(value1.x.addFp2(value2.x)); sum.y = value1.y.addFp2(s.mulFp2(sum.x.minusFp2(value1.x))); uint p = Fp2Operations.P; sum.y.a = p - sum.y.a; sum.y.b = p - sum.y.b; } function toUS(G2Point memory value) internal pure returns (G2Point memory) { return G2Point({ x: value.x.mulFp2(Fp2Operations.Fp2Point({ a: 1, b: 0 }).squaredFp2()), y: value.y.mulFp2( Fp2Operations.Fp2Point({ a: 1, b: 0 }).mulFp2(Fp2Operations.Fp2Point({ a: 1, b: 0 }).squaredFp2()) ) }); } function isEqual( G2Point memory value1, G2Point memory value2 ) internal pure returns (bool) { return value1.x.isEqual(value2.x) && value1.y.isEqual(value2.y); } function doubleG2(G2Point memory value) internal view returns (G2Point memory result) { if (isG2Zero(value)) { return value; } else { Fp2Operations.Fp2Point memory s = value.x.squaredFp2().scalarMulFp2(3).mulFp2(value.y.scalarMulFp2(2).inverseFp2()); result.x = s.squaredFp2().minusFp2(value.x.addFp2(value.x)); result.y = value.y.addFp2(s.mulFp2(result.x.minusFp2(value.x))); uint p = Fp2Operations.P; result.y.a = p - result.y.a; result.y.b = p - result.y.b; } } function mulG2( G2Point memory value, uint scalar ) internal view returns (G2Point memory result) { uint step = scalar; result = G2Point({ x: Fp2Operations.Fp2Point({ a: 0, b: 0 }), y: Fp2Operations.Fp2Point({ a: 1, b: 0 }) }); G2Point memory tmp = value; uint gs = gasleft(); while (step > 0) { if (step % 2 == 1) { result = addG2(result, tmp); } gs = gasleft(); tmp = doubleG2(tmp); step >>= 1; } } } library FractionUtils { using SafeMath for uint; struct Fraction { uint numerator; uint denominator; } function createFraction(uint numerator, uint denominator) internal pure returns (Fraction memory) { require(denominator > 0, "Division by zero"); Fraction memory fraction = Fraction({numerator: numerator, denominator: denominator}); reduceFraction(fraction); return fraction; } function createFraction(uint value) internal pure returns (Fraction memory) { return createFraction(value, 1); } function reduceFraction(Fraction memory fraction) internal pure { uint _gcd = gcd(fraction.numerator, fraction.denominator); fraction.numerator = fraction.numerator.div(_gcd); fraction.denominator = fraction.denominator.div(_gcd); } function multiplyFraction(Fraction memory a, Fraction memory b) internal pure returns (Fraction memory) { return createFraction(a.numerator.mul(b.numerator), a.denominator.mul(b.denominator)); } function gcd(uint a, uint b) internal pure returns (uint) { uint _a = a; uint _b = b; if (_b > _a) { (_a, _b) = swap(_a, _b); } while (_b > 0) { _a = _a.mod(_b); (_a, _b) = swap (_a, _b); } return _a; } function swap(uint a, uint b) internal pure returns (uint, uint) { return (b, a); } } interface IDelegatableToken { /** * @dev Updates and returns the amount of locked tokens of a given account (`wallet`). */ function getAndUpdateLockedAmount(address wallet) external returns (uint); /** * @dev Updates and returns the amount of delegated tokens of a given account (`wallet`). */ function getAndUpdateDelegatedAmount(address wallet) external returns (uint); /** * @dev Updates and returns the amount of slashed tokens of a given account (`wallet`). */ function getAndUpdateSlashedAmount(address wallet) external returns (uint); } interface IERC1820Registry { /** * @dev Sets `newManager` as the manager for `account`. A manager of an * account is able to set interface implementers for it. * * By default, each account is its own manager. Passing a value of `0x0` in * `newManager` will reset the manager to this initial state. * * Emits a {ManagerChanged} event. * * Requirements: * * - the caller must be the current manager for `account`. */ function setManager(address account, address newManager) external; /** * @dev Returns the manager for `account`. * * See {setManager}. */ function getManager(address account) external view returns (address); /** * @dev Sets the `implementer` contract as ``account``'s implementer for * `interfaceHash`. * * `account` being the zero address is an alias for the caller's address. * The zero address can also be used in `implementer` to remove an old one. * * See {interfaceHash} to learn how these are created. * * Emits an {InterfaceImplementerSet} event. * * Requirements: * * - the caller must be the current manager for `account`. * - `interfaceHash` must not be an {IERC165} interface id (i.e. it must not * end in 28 zeroes). * - `implementer` must implement {IERC1820Implementer} and return true when * queried for support, unless `implementer` is the caller. See * {IERC1820Implementer-canImplementInterfaceForAddress}. */ function setInterfaceImplementer(address account, bytes32 interfaceHash, address implementer) external; /** * @dev Returns the implementer of `interfaceHash` for `account`. If no such * implementer is registered, returns the zero address. * * If `interfaceHash` is an {IERC165} interface id (i.e. it ends with 28 * zeroes), `account` will be queried for support of it. * * `account` being the zero address is an alias for the caller's address. */ function getInterfaceImplementer(address account, bytes32 interfaceHash) external view returns (address); /** * @dev Returns the interface hash for an `interfaceName`, as defined in the * corresponding * https://eips.ethereum.org/EIPS/eip-1820#interface-name[section of the EIP]. */ function interfaceHash(string calldata interfaceName) external pure returns (bytes32); /** * @notice Updates the cache with whether the contract implements an ERC165 interface or not. * @param account Address of the contract for which to update the cache. * @param interfaceId ERC165 interface for which to update the cache. */ function updateERC165Cache(address account, bytes4 interfaceId) external; /** * @notice Checks whether a contract implements an ERC165 interface or not. * If the result is not cached a direct lookup on the contract address is performed. * If the result is not cached or the cached value is out-of-date, the cache MUST be updated manually by calling * {updateERC165Cache} with the contract address. * @param account Address of the contract to check. * @param interfaceId ERC165 interface to check. * @return True if `account` implements `interfaceId`, false otherwise. */ function implementsERC165Interface(address account, bytes4 interfaceId) external view returns (bool); /** * @notice Checks whether a contract implements an ERC165 interface or not without using nor updating the cache. * @param account Address of the contract to check. * @param interfaceId ERC165 interface to check. * @return True if `account` implements `interfaceId`, false otherwise. */ function implementsERC165InterfaceNoCache(address account, bytes4 interfaceId) external view returns (bool); event InterfaceImplementerSet(address indexed account, bytes32 indexed interfaceHash, address indexed implementer); event ManagerChanged(address indexed account, address indexed newManager); } interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } interface IERC777 { /** * @dev Returns the name of the token. */ function name() external view returns (string memory); /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() external view returns (string memory); /** * @dev Returns the smallest part of the token that is not divisible. This * means all token operations (creation, movement and destruction) must have * amounts that are a multiple of this number. * * For most token contracts, this value will equal 1. */ function granularity() external view returns (uint256); /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by an account (`owner`). */ function balanceOf(address owner) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * If send or receive hooks are registered for the caller and `recipient`, * the corresponding functions will be called with `data` and empty * `operatorData`. See {IERC777Sender} and {IERC777Recipient}. * * Emits a {Sent} event. * * Requirements * * - the caller must have at least `amount` tokens. * - `recipient` cannot be the zero address. * - if `recipient` is a contract, it must implement the {IERC777Recipient} * interface. */ function send(address recipient, uint256 amount, bytes calldata data) external; /** * @dev Destroys `amount` tokens from the caller's account, reducing the * total supply. * * If a send hook is registered for the caller, the corresponding function * will be called with `data` and empty `operatorData`. See {IERC777Sender}. * * Emits a {Burned} event. * * Requirements * * - the caller must have at least `amount` tokens. */ function burn(uint256 amount, bytes calldata data) external; /** * @dev Returns true if an account is an operator of `tokenHolder`. * Operators can send and burn tokens on behalf of their owners. All * accounts are their own operator. * * See {operatorSend} and {operatorBurn}. */ function isOperatorFor(address operator, address tokenHolder) external view returns (bool); /** * @dev Make an account an operator of the caller. * * See {isOperatorFor}. * * Emits an {AuthorizedOperator} event. * * Requirements * * - `operator` cannot be calling address. */ function authorizeOperator(address operator) external; /** * @dev Revoke an account's operator status for the caller. * * See {isOperatorFor} and {defaultOperators}. * * Emits a {RevokedOperator} event. * * Requirements * * - `operator` cannot be calling address. */ function revokeOperator(address operator) external; /** * @dev Returns the list of default operators. These accounts are operators * for all token holders, even if {authorizeOperator} was never called on * them. * * This list is immutable, but individual holders may revoke these via * {revokeOperator}, in which case {isOperatorFor} will return false. */ function defaultOperators() external view returns (address[] memory); /** * @dev Moves `amount` tokens from `sender` to `recipient`. The caller must * be an operator of `sender`. * * If send or receive hooks are registered for `sender` and `recipient`, * the corresponding functions will be called with `data` and * `operatorData`. See {IERC777Sender} and {IERC777Recipient}. * * Emits a {Sent} event. * * Requirements * * - `sender` cannot be the zero address. * - `sender` must have at least `amount` tokens. * - the caller must be an operator for `sender`. * - `recipient` cannot be the zero address. * - if `recipient` is a contract, it must implement the {IERC777Recipient} * interface. */ function operatorSend( address sender, address recipient, uint256 amount, bytes calldata data, bytes calldata operatorData ) external; /** * @dev Destroys `amount` tokens from `account`, reducing the total supply. * The caller must be an operator of `account`. * * If a send hook is registered for `account`, the corresponding function * will be called with `data` and `operatorData`. See {IERC777Sender}. * * Emits a {Burned} event. * * Requirements * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. * - the caller must be an operator for `account`. */ function operatorBurn( address account, uint256 amount, bytes calldata data, bytes calldata operatorData ) external; event Sent( address indexed operator, address indexed from, address indexed to, uint256 amount, bytes data, bytes operatorData ); event Minted(address indexed operator, address indexed to, uint256 amount, bytes data, bytes operatorData); event Burned(address indexed operator, address indexed from, uint256 amount, bytes data, bytes operatorData); event AuthorizedOperator(address indexed operator, address indexed tokenHolder); event RevokedOperator(address indexed operator, address indexed tokenHolder); } interface IERC777Recipient { /** * @dev Called by an {IERC777} token contract whenever tokens are being * moved or created into a registered account (`to`). The type of operation * is conveyed by `from` being the zero address or not. * * This call occurs _after_ the token contract's state is updated, so * {IERC777-balanceOf}, etc., can be used to query the post-operation state. * * This function may revert to prevent the operation from being executed. */ function tokensReceived( address operator, address from, address to, uint256 amount, bytes calldata userData, bytes calldata operatorData ) external; } interface IERC777Sender { /** * @dev Called by an {IERC777} token contract whenever a registered holder's * (`from`) tokens are about to be moved or destroyed. The type of operation * is conveyed by `to` being the zero address or not. * * This call occurs _before_ the token contract's state is updated, so * {IERC777-balanceOf}, etc., can be used to query the pre-operation state. * * This function may revert to prevent the operation from being executed. */ function tokensToSend( address operator, address from, address to, uint256 amount, bytes calldata userData, bytes calldata operatorData ) external; } interface ILocker { /** * @dev Returns the locked amount of untransferable tokens of a given `wallet` */ function getAndUpdateLockedAmount(address wallet) external returns (uint); /** * @dev Returns the locked amount of untransferable and un-delegatable tokens of a given `wallet`. */ function getAndUpdateForbiddenForDelegationAmount(address wallet) external returns (uint); } interface IMintableToken { function mint( address account, uint256 amount, bytes calldata userData, bytes calldata operatorData ) external returns (bool); } interface ISkaleDKG { function openChannel(bytes32 schainId) external; function deleteChannel(bytes32 schainId) external; function isLastDKGSuccesful(bytes32 groupIndex) external view returns (bool); function isChannelOpened(bytes32 schainId) external view returns (bool); } contract Initializable { /** * @dev Indicates that the contract has been initialized. */ bool private initialized; /** * @dev Indicates that the contract is in the process of being initialized. */ bool private initializing; /** * @dev Modifier to use in the initializer function of a contract. */ modifier initializer() { require(initializing || isConstructor() || !initialized, "Contract instance has already been initialized"); bool isTopLevelCall = !initializing; if (isTopLevelCall) { initializing = true; initialized = true; } _; if (isTopLevelCall) { initializing = false; } } /// @dev Returns true if and only if the function is running in the constructor function isConstructor() private view returns (bool) { // extcodesize checks the size of the code stored in an address, and // address returns the current address. Since the code is still not // deployed when running a constructor, any checks on its code size will // yield zero, making it an effective way to detect if a contract is // under construction or not. address self = address(this); uint256 cs; assembly { cs := extcodesize(self) } return cs == 0; } // Reserved storage space to allow for layout changes in the future. uint256[50] private ______gap; } library MathUtils { event UnderflowError( uint a, uint b ); uint constant private _EPS = 1e6; function boundedSub(uint256 a, uint256 b) internal returns (uint256) { if (a >= b) { return a - b; } else { emit UnderflowError(a, b); return 0; } } function boundedSubWithoutEvent(uint256 a, uint256 b) internal pure returns (uint256) { if (a >= b) { return a - b; } else { return 0; } } function muchGreater(uint256 a, uint256 b) internal pure returns (bool) { assert(uint(-1) - _EPS > b); return a > b + _EPS; } function approximatelyEqual(uint256 a, uint256 b) internal pure returns (bool) { if (a > b) { return a - b < _EPS; } else { return b - a < _EPS; } } } contract Migrations { address public owner; uint public last_completed_migration; modifier restricted() { if (msg.sender == owner) _; } constructor() public { owner = msg.sender; } function setCompleted(uint completed) external restricted { last_completed_migration = completed; } function upgrade(address new_address) external restricted { Migrations upgraded = Migrations(new_address); upgraded.setCompleted(last_completed_migration); } } library PartialDifferences { using SafeMath for uint; using MathUtils for uint; struct Sequence { // month => diff mapping (uint => uint) addDiff; // month => diff mapping (uint => uint) subtractDiff; // month => value mapping (uint => uint) value; uint firstUnprocessedMonth; uint lastChangedMonth; } struct Value { // month => diff mapping (uint => uint) addDiff; // month => diff mapping (uint => uint) subtractDiff; uint value; uint firstUnprocessedMonth; uint lastChangedMonth; } // functions for sequence function addToSequence(Sequence storage sequence, uint diff, uint month) internal { require(sequence.firstUnprocessedMonth <= month, "Cannot add to the past"); if (sequence.firstUnprocessedMonth == 0) { sequence.firstUnprocessedMonth = month; } sequence.addDiff[month] = sequence.addDiff[month].add(diff); if (sequence.lastChangedMonth != month) { sequence.lastChangedMonth = month; } } function subtractFromSequence(Sequence storage sequence, uint diff, uint month) internal { require(sequence.firstUnprocessedMonth <= month, "Cannot subtract from the past"); if (sequence.firstUnprocessedMonth == 0) { sequence.firstUnprocessedMonth = month; } sequence.subtractDiff[month] = sequence.subtractDiff[month].add(diff); if (sequence.lastChangedMonth != month) { sequence.lastChangedMonth = month; } } function getAndUpdateValueInSequence(Sequence storage sequence, uint month) internal returns (uint) { if (sequence.firstUnprocessedMonth == 0) { return 0; } if (sequence.firstUnprocessedMonth <= month) { for (uint i = sequence.firstUnprocessedMonth; i <= month; ++i) { uint nextValue = sequence.value[i.sub(1)].add(sequence.addDiff[i]).boundedSub(sequence.subtractDiff[i]); if (sequence.value[i] != nextValue) { sequence.value[i] = nextValue; } if (sequence.addDiff[i] > 0) { delete sequence.addDiff[i]; } if (sequence.subtractDiff[i] > 0) { delete sequence.subtractDiff[i]; } } sequence.firstUnprocessedMonth = month.add(1); } return sequence.value[month]; } function reduceSequence( Sequence storage sequence, FractionUtils.Fraction memory reducingCoefficient, uint month) internal { require(month.add(1) >= sequence.firstUnprocessedMonth, "Can't reduce value in the past"); require( reducingCoefficient.numerator <= reducingCoefficient.denominator, "Increasing of values is not implemented"); if (sequence.firstUnprocessedMonth == 0) { return; } uint value = getAndUpdateValueInSequence(sequence, month); if (value.approximatelyEqual(0)) { return; } sequence.value[month] = sequence.value[month] .mul(reducingCoefficient.numerator) .div(reducingCoefficient.denominator); for (uint i = month.add(1); i <= sequence.lastChangedMonth; ++i) { sequence.subtractDiff[i] = sequence.subtractDiff[i] .mul(reducingCoefficient.numerator) .div(reducingCoefficient.denominator); } } // functions for value function addToValue(Value storage sequence, uint diff, uint month) internal { require(sequence.firstUnprocessedMonth <= month, "Cannot add to the past"); if (sequence.firstUnprocessedMonth == 0) { sequence.firstUnprocessedMonth = month; sequence.lastChangedMonth = month; } if (month > sequence.lastChangedMonth) { sequence.lastChangedMonth = month; } if (month >= sequence.firstUnprocessedMonth) { sequence.addDiff[month] = sequence.addDiff[month].add(diff); } else { sequence.value = sequence.value.add(diff); } } function subtractFromValue(Value storage sequence, uint diff, uint month) internal { require(sequence.firstUnprocessedMonth <= month.add(1), "Cannot subtract from the past"); if (sequence.firstUnprocessedMonth == 0) { sequence.firstUnprocessedMonth = month; sequence.lastChangedMonth = month; } if (month > sequence.lastChangedMonth) { sequence.lastChangedMonth = month; } if (month >= sequence.firstUnprocessedMonth) { sequence.subtractDiff[month] = sequence.subtractDiff[month].add(diff); } else { sequence.value = sequence.value.boundedSub(diff); } } function getAndUpdateValue(Value storage sequence, uint month) internal returns (uint) { require( month.add(1) >= sequence.firstUnprocessedMonth, "Cannot calculate value in the past"); if (sequence.firstUnprocessedMonth == 0) { return 0; } if (sequence.firstUnprocessedMonth <= month) { for (uint i = sequence.firstUnprocessedMonth; i <= month; ++i) { uint newValue = sequence.value.add(sequence.addDiff[i]).boundedSub(sequence.subtractDiff[i]); if (sequence.value != newValue) { sequence.value = newValue; } if (sequence.addDiff[i] > 0) { delete sequence.addDiff[i]; } if (sequence.subtractDiff[i] > 0) { delete sequence.subtractDiff[i]; } } sequence.firstUnprocessedMonth = month.add(1); } return sequence.value; } function reduceValue( Value storage sequence, uint amount, uint month) internal returns (FractionUtils.Fraction memory) { require(month.add(1) >= sequence.firstUnprocessedMonth, "Cannot reduce value in the past"); if (sequence.firstUnprocessedMonth == 0) { return FractionUtils.createFraction(0); } uint value = getAndUpdateValue(sequence, month); if (value.approximatelyEqual(0)) { return FractionUtils.createFraction(0); } uint _amount = amount; if (value < amount) { _amount = value; } FractionUtils.Fraction memory reducingCoefficient = FractionUtils.createFraction(value.boundedSub(_amount), value); reduceValueByCoefficient(sequence, reducingCoefficient, month); return reducingCoefficient; } function reduceValueByCoefficient( Value storage sequence, FractionUtils.Fraction memory reducingCoefficient, uint month) internal { reduceValueByCoefficientAndUpdateSumIfNeeded( sequence, sequence, reducingCoefficient, month, false); } function reduceValueByCoefficientAndUpdateSum( Value storage sequence, Value storage sumSequence, FractionUtils.Fraction memory reducingCoefficient, uint month) internal { reduceValueByCoefficientAndUpdateSumIfNeeded( sequence, sumSequence, reducingCoefficient, month, true); } function reduceValueByCoefficientAndUpdateSumIfNeeded( Value storage sequence, Value storage sumSequence, FractionUtils.Fraction memory reducingCoefficient, uint month, bool hasSumSequence) internal { require(month.add(1) >= sequence.firstUnprocessedMonth, "Cannot reduce value in the past"); if (hasSumSequence) { require(month.add(1) >= sumSequence.firstUnprocessedMonth, "Cannot reduce value in the past"); } require( reducingCoefficient.numerator <= reducingCoefficient.denominator, "Increasing of values is not implemented"); if (sequence.firstUnprocessedMonth == 0) { return; } uint value = getAndUpdateValue(sequence, month); if (value.approximatelyEqual(0)) { return; } uint newValue = sequence.value.mul(reducingCoefficient.numerator).div(reducingCoefficient.denominator); if (hasSumSequence) { subtractFromValue(sumSequence, sequence.value.boundedSub(newValue), month); } sequence.value = newValue; for (uint i = month.add(1); i <= sequence.lastChangedMonth; ++i) { uint newDiff = sequence.subtractDiff[i] .mul(reducingCoefficient.numerator) .div(reducingCoefficient.denominator); if (hasSumSequence) { sumSequence.subtractDiff[i] = sumSequence.subtractDiff[i] .boundedSub(sequence.subtractDiff[i].boundedSub(newDiff)); } sequence.subtractDiff[i] = newDiff; } } function clear(Value storage sequence) internal { for (uint i = sequence.firstUnprocessedMonth; i <= sequence.lastChangedMonth; ++i) { if (sequence.addDiff[i] > 0) { delete sequence.addDiff[i]; } if (sequence.subtractDiff[i] > 0) { delete sequence.subtractDiff[i]; } } if (sequence.value > 0) { delete sequence.value; } if (sequence.firstUnprocessedMonth > 0) { delete sequence.firstUnprocessedMonth; } if (sequence.lastChangedMonth > 0) { delete sequence.lastChangedMonth; } } } library Precompiled { function bigModExp(uint base, uint power, uint modulus) internal view returns (uint) { uint[6] memory inputToBigModExp; inputToBigModExp[0] = 32; inputToBigModExp[1] = 32; inputToBigModExp[2] = 32; inputToBigModExp[3] = base; inputToBigModExp[4] = power; inputToBigModExp[5] = modulus; uint[1] memory out; bool success; // solhint-disable-next-line no-inline-assembly assembly { success := staticcall(not(0), 5, inputToBigModExp, mul(6, 0x20), out, 0x20) } require(success, "BigModExp failed"); return out[0]; } function bn256ScalarMul(uint x, uint y, uint k) internal view returns (uint , uint ) { uint[3] memory inputToMul; uint[2] memory output; inputToMul[0] = x; inputToMul[1] = y; inputToMul[2] = k; bool success; // solhint-disable-next-line no-inline-assembly assembly { success := staticcall(not(0), 7, inputToMul, 0x60, output, 0x40) } require(success, "Multiplication failed"); return (output[0], output[1]); } function bn256Pairing( uint x1, uint y1, uint a1, uint b1, uint c1, uint d1, uint x2, uint y2, uint a2, uint b2, uint c2, uint d2) internal view returns (bool) { bool success; uint[12] memory inputToPairing; inputToPairing[0] = x1; inputToPairing[1] = y1; inputToPairing[2] = a1; inputToPairing[3] = b1; inputToPairing[4] = c1; inputToPairing[5] = d1; inputToPairing[6] = x2; inputToPairing[7] = y2; inputToPairing[8] = a2; inputToPairing[9] = b2; inputToPairing[10] = c2; inputToPairing[11] = d2; uint[1] memory out; // solhint-disable-next-line no-inline-assembly assembly { success := staticcall(not(0), 8, inputToPairing, mul(12, 0x20), out, 0x20) } require(success, "Pairing check failed"); return out[0] != 0; } } contract ReentrancyGuard { // Booleans are more expensive than uint256 or any type that takes up a full // word because each write operation emits an extra SLOAD to first read the // slot's contents, replace the bits taken up by the boolean, and then write // back. This is the compiler's defense against contract upgrades and // pointer aliasing, and it cannot be disabled. // The values being non-zero value makes deployment a bit more expensive, // but in exchange the refund on every call to nonReentrant will be lower in // amount. Since refunds are capped to a percentage of the total // transaction's gas, it is best to keep them low in cases like this one, to // increase the likelihood of the full refund coming into effect. uint256 private constant _NOT_ENTERED = 1; uint256 private constant _ENTERED = 2; uint256 private _status; constructor () internal { _status = _NOT_ENTERED; } /** * @dev Prevents a contract from calling itself, directly or indirectly. * Calling a `nonReentrant` function from another `nonReentrant` * function is not supported. It is possible to prevent this from happening * by making the `nonReentrant` function external, and make it call a * `private` function that does the actual work. */ modifier nonReentrant() { // On the first call to nonReentrant, _notEntered will be true require(_status != _ENTERED, "ReentrancyGuard: reentrant call"); // Any calls to nonReentrant after this point will fail _status = _ENTERED; _; // By storing the original value once again, a refund is triggered (see // https://eips.ethereum.org/EIPS/eip-2200) _status = _NOT_ENTERED; } } library SafeCast { /** * @dev Returns the downcasted uint128 from uint256, reverting on * overflow (when the input is greater than largest uint128). * * Counterpart to Solidity's `uint128` operator. * * Requirements: * * - input must fit into 128 bits */ function toUint128(uint256 value) internal pure returns (uint128) { require(value < 2**128, "SafeCast: value doesn\'t fit in 128 bits"); return uint128(value); } /** * @dev Returns the downcasted uint64 from uint256, reverting on * overflow (when the input is greater than largest uint64). * * Counterpart to Solidity's `uint64` operator. * * Requirements: * * - input must fit into 64 bits */ function toUint64(uint256 value) internal pure returns (uint64) { require(value < 2**64, "SafeCast: value doesn\'t fit in 64 bits"); return uint64(value); } /** * @dev Returns the downcasted uint32 from uint256, reverting on * overflow (when the input is greater than largest uint32). * * Counterpart to Solidity's `uint32` operator. * * Requirements: * * - input must fit into 32 bits */ function toUint32(uint256 value) internal pure returns (uint32) { require(value < 2**32, "SafeCast: value doesn\'t fit in 32 bits"); return uint32(value); } /** * @dev Returns the downcasted uint16 from uint256, reverting on * overflow (when the input is greater than largest uint16). * * Counterpart to Solidity's `uint16` operator. * * Requirements: * * - input must fit into 16 bits */ function toUint16(uint256 value) internal pure returns (uint16) { require(value < 2**16, "SafeCast: value doesn\'t fit in 16 bits"); return uint16(value); } /** * @dev Returns the downcasted uint8 from uint256, reverting on * overflow (when the input is greater than largest uint8). * * Counterpart to Solidity's `uint8` operator. * * Requirements: * * - input must fit into 8 bits. */ function toUint8(uint256 value) internal pure returns (uint8) { require(value < 2**8, "SafeCast: value doesn\'t fit in 8 bits"); return uint8(value); } /** * @dev Converts a signed int256 into an unsigned uint256. * * Requirements: * * - input must be greater than or equal to 0. */ function toUint256(int256 value) internal pure returns (uint256) { require(value >= 0, "SafeCast: value must be positive"); return uint256(value); } /** * @dev Converts an unsigned uint256 into a signed int256. * * Requirements: * * - input must be less than or equal to maxInt256. */ function toInt256(uint256 value) internal pure returns (int256) { require(value < 2**255, "SafeCast: value doesn't fit in an int256"); return int256(value); } } library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { // Solidity only automatically asserts when dividing by 0 require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } library StringUtils { using SafeMath for uint; function strConcat(string memory a, string memory b) internal pure returns (string memory) { bytes memory _ba = bytes(a); bytes memory _bb = bytes(b); string memory ab = new string(_ba.length.add(_bb.length)); bytes memory strBytes = bytes(ab); uint k = 0; uint i = 0; for (i = 0; i < _ba.length; i++) { strBytes[k++] = _ba[i]; } for (i = 0; i < _bb.length; i++) { strBytes[k++] = _bb[i]; } return string(strBytes); } function uint2str(uint i) internal pure returns (string memory) { if (i == 0) { return "0"; } uint j = i; uint _i = i; uint len; while (j != 0) { len++; j /= 10; } bytes memory bstr = new bytes(len); uint k = len.sub(1); while (_i != 0) { bstr[k--] = byte(uint8(48 + _i % 10)); _i /= 10; } return string(bstr); } } contract TimeHelpers { using SafeMath for uint; uint constant private _ZERO_YEAR = 2020; function calculateProofOfUseLockEndTime(uint month, uint lockUpPeriodDays) external view returns (uint timestamp) { timestamp = BokkyPooBahsDateTimeLibrary.addDays(monthToTimestamp(month), lockUpPeriodDays); } function addDays(uint fromTimestamp, uint n) external pure returns (uint) { return BokkyPooBahsDateTimeLibrary.addDays(fromTimestamp, n); } function addMonths(uint fromTimestamp, uint n) external pure returns (uint) { return BokkyPooBahsDateTimeLibrary.addMonths(fromTimestamp, n); } function addYears(uint fromTimestamp, uint n) external pure returns (uint) { return BokkyPooBahsDateTimeLibrary.addYears(fromTimestamp, n); } function getCurrentMonth() external view virtual returns (uint) { return timestampToMonth(now); } function timestampToDay(uint timestamp) external view returns (uint) { uint wholeDays = timestamp / BokkyPooBahsDateTimeLibrary.SECONDS_PER_DAY; uint zeroDay = BokkyPooBahsDateTimeLibrary.timestampFromDate(_ZERO_YEAR, 1, 1) / BokkyPooBahsDateTimeLibrary.SECONDS_PER_DAY; require(wholeDays >= zeroDay, "Timestamp is too far in the past"); return wholeDays - zeroDay; } function timestampToYear(uint timestamp) external view virtual returns (uint) { uint year; (year, , ) = BokkyPooBahsDateTimeLibrary.timestampToDate(timestamp); require(year >= _ZERO_YEAR, "Timestamp is too far in the past"); return year - _ZERO_YEAR; } function timestampToMonth(uint timestamp) public view virtual returns (uint) { uint year; uint month; (year, month, ) = BokkyPooBahsDateTimeLibrary.timestampToDate(timestamp); require(year >= _ZERO_YEAR, "Timestamp is too far in the past"); month = month.sub(1).add(year.sub(_ZERO_YEAR).mul(12)); require(month > 0, "Timestamp is too far in the past"); return month; } function monthToTimestamp(uint month) public view virtual returns (uint timestamp) { uint year = _ZERO_YEAR; uint _month = month; year = year.add(_month.div(12)); _month = _month.mod(12); _month = _month.add(1); return BokkyPooBahsDateTimeLibrary.timestampFromDate(year, _month, 1); } } contract ContextUpgradeSafe is Initializable { // Empty internal constructor, to prevent people from mistakenly deploying // an instance of this contract, which should be used via inheritance. function __Context_init() internal initializer { __Context_init_unchained(); } function __Context_init_unchained() internal initializer { } function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } uint256[50] private __gap; } contract ERC777 is Context, IERC777, IERC20 { using SafeMath for uint256; using Address for address; IERC1820Registry constant internal _ERC1820_REGISTRY = IERC1820Registry(0x1820a4B7618BdE71Dce8cdc73aAB6C95905faD24); mapping(address => uint256) private _balances; uint256 private _totalSupply; string private _name; string private _symbol; // We inline the result of the following hashes because Solidity doesn't resolve them at compile time. // See https://github.com/ethereum/solidity/issues/4024. // keccak256("ERC777TokensSender") bytes32 constant private _TOKENS_SENDER_INTERFACE_HASH = 0x29ddb589b1fb5fc7cf394961c1adf5f8c6454761adf795e67fe149f658abe895; // keccak256("ERC777TokensRecipient") bytes32 constant private _TOKENS_RECIPIENT_INTERFACE_HASH = 0xb281fc8c12954d22544db45de3159a39272895b169a852b314f9cc762e44c53b; // This isn't ever read from - it's only used to respond to the defaultOperators query. address[] private _defaultOperatorsArray; // Immutable, but accounts may revoke them (tracked in __revokedDefaultOperators). mapping(address => bool) private _defaultOperators; // For each account, a mapping of its operators and revoked default operators. mapping(address => mapping(address => bool)) private _operators; mapping(address => mapping(address => bool)) private _revokedDefaultOperators; // ERC20-allowances mapping (address => mapping (address => uint256)) private _allowances; /** * @dev `defaultOperators` may be an empty array. */ constructor( string memory name, string memory symbol, address[] memory defaultOperators ) public { _name = name; _symbol = symbol; _defaultOperatorsArray = defaultOperators; for (uint256 i = 0; i < _defaultOperatorsArray.length; i++) { _defaultOperators[_defaultOperatorsArray[i]] = true; } // register interfaces _ERC1820_REGISTRY.setInterfaceImplementer(address(this), keccak256("ERC777Token"), address(this)); _ERC1820_REGISTRY.setInterfaceImplementer(address(this), keccak256("ERC20Token"), address(this)); } /** * @dev See {IERC777-name}. */ function name() public view override returns (string memory) { return _name; } /** * @dev See {IERC777-symbol}. */ function symbol() public view override returns (string memory) { return _symbol; } /** * @dev See {ERC20-decimals}. * * Always returns 18, as per the * [ERC777 EIP](https://eips.ethereum.org/EIPS/eip-777#backward-compatibility). */ function decimals() public pure returns (uint8) { return 18; } /** * @dev See {IERC777-granularity}. * * This implementation always returns `1`. */ function granularity() public view override returns (uint256) { return 1; } /** * @dev See {IERC777-totalSupply}. */ function totalSupply() public view override(IERC20, IERC777) returns (uint256) { return _totalSupply; } /** * @dev Returns the amount of tokens owned by an account (`tokenHolder`). */ function balanceOf(address tokenHolder) public view override(IERC20, IERC777) returns (uint256) { return _balances[tokenHolder]; } /** * @dev See {IERC777-send}. * * Also emits a {IERC20-Transfer} event for ERC20 compatibility. */ function send(address recipient, uint256 amount, bytes memory data) public override { _send(_msgSender(), recipient, amount, data, "", true); } /** * @dev See {IERC20-transfer}. * * Unlike `send`, `recipient` is _not_ required to implement the {IERC777Recipient} * interface if it is a contract. * * Also emits a {Sent} event. */ function transfer(address recipient, uint256 amount) public override returns (bool) { require(recipient != address(0), "ERC777: transfer to the zero address"); address from = _msgSender(); _callTokensToSend(from, from, recipient, amount, "", ""); _move(from, from, recipient, amount, "", ""); _callTokensReceived(from, from, recipient, amount, "", "", false); return true; } /** * @dev See {IERC777-burn}. * * Also emits a {IERC20-Transfer} event for ERC20 compatibility. */ function burn(uint256 amount, bytes memory data) public override { _burn(_msgSender(), amount, data, ""); } /** * @dev See {IERC777-isOperatorFor}. */ function isOperatorFor( address operator, address tokenHolder ) public view override returns (bool) { return operator == tokenHolder || (_defaultOperators[operator] && !_revokedDefaultOperators[tokenHolder][operator]) || _operators[tokenHolder][operator]; } /** * @dev See {IERC777-authorizeOperator}. */ function authorizeOperator(address operator) public override { require(_msgSender() != operator, "ERC777: authorizing self as operator"); if (_defaultOperators[operator]) { delete _revokedDefaultOperators[_msgSender()][operator]; } else { _operators[_msgSender()][operator] = true; } emit AuthorizedOperator(operator, _msgSender()); } /** * @dev See {IERC777-revokeOperator}. */ function revokeOperator(address operator) public override { require(operator != _msgSender(), "ERC777: revoking self as operator"); if (_defaultOperators[operator]) { _revokedDefaultOperators[_msgSender()][operator] = true; } else { delete _operators[_msgSender()][operator]; } emit RevokedOperator(operator, _msgSender()); } /** * @dev See {IERC777-defaultOperators}. */ function defaultOperators() public view override returns (address[] memory) { return _defaultOperatorsArray; } /** * @dev See {IERC777-operatorSend}. * * Emits {Sent} and {IERC20-Transfer} events. */ function operatorSend( address sender, address recipient, uint256 amount, bytes memory data, bytes memory operatorData ) public override { require(isOperatorFor(_msgSender(), sender), "ERC777: caller is not an operator for holder"); _send(sender, recipient, amount, data, operatorData, true); } /** * @dev See {IERC777-operatorBurn}. * * Emits {Burned} and {IERC20-Transfer} events. */ function operatorBurn(address account, uint256 amount, bytes memory data, bytes memory operatorData) public override { require(isOperatorFor(_msgSender(), account), "ERC777: caller is not an operator for holder"); _burn(account, amount, data, operatorData); } /** * @dev See {IERC20-allowance}. * * Note that operator and allowance concepts are orthogonal: operators may * not have allowance, and accounts with allowance may not be operators * themselves. */ function allowance(address holder, address spender) public view override returns (uint256) { return _allowances[holder][spender]; } /** * @dev See {IERC20-approve}. * * Note that accounts cannot have allowance issued by their operators. */ function approve(address spender, uint256 value) public override returns (bool) { address holder = _msgSender(); _approve(holder, spender, value); return true; } /** * @dev See {IERC20-transferFrom}. * * Note that operator and allowance concepts are orthogonal: operators cannot * call `transferFrom` (unless they have allowance), and accounts with * allowance cannot call `operatorSend` (unless they are operators). * * Emits {Sent}, {IERC20-Transfer} and {IERC20-Approval} events. */ function transferFrom(address holder, address recipient, uint256 amount) public override returns (bool) { require(recipient != address(0), "ERC777: transfer to the zero address"); require(holder != address(0), "ERC777: transfer from the zero address"); address spender = _msgSender(); _callTokensToSend(spender, holder, recipient, amount, "", ""); _move(spender, holder, recipient, amount, "", ""); _approve(holder, spender, _allowances[holder][spender].sub(amount, "ERC777: transfer amount exceeds allowance")); _callTokensReceived(spender, holder, recipient, amount, "", "", false); return true; } /** * @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * If a send hook is registered for `account`, the corresponding function * will be called with `operator`, `data` and `operatorData`. * * See {IERC777Sender} and {IERC777Recipient}. * * Emits {Minted} and {IERC20-Transfer} events. * * Requirements * * - `account` cannot be the zero address. * - if `account` is a contract, it must implement the {IERC777Recipient} * interface. */ function _mint( address account, uint256 amount, bytes memory userData, bytes memory operatorData ) internal virtual { require(account != address(0), "ERC777: mint to the zero address"); address operator = _msgSender(); _beforeTokenTransfer(operator, address(0), account, amount); // Update state variables _totalSupply = _totalSupply.add(amount); _balances[account] = _balances[account].add(amount); _callTokensReceived(operator, address(0), account, amount, userData, operatorData, true); emit Minted(operator, account, amount, userData, operatorData); emit Transfer(address(0), account, amount); } /** * @dev Send tokens * @param from address token holder address * @param to address recipient address * @param amount uint256 amount of tokens to transfer * @param userData bytes extra information provided by the token holder (if any) * @param operatorData bytes extra information provided by the operator (if any) * @param requireReceptionAck if true, contract recipients are required to implement ERC777TokensRecipient */ function _send( address from, address to, uint256 amount, bytes memory userData, bytes memory operatorData, bool requireReceptionAck ) internal { require(from != address(0), "ERC777: send from the zero address"); require(to != address(0), "ERC777: send to the zero address"); address operator = _msgSender(); _callTokensToSend(operator, from, to, amount, userData, operatorData); _move(operator, from, to, amount, userData, operatorData); _callTokensReceived(operator, from, to, amount, userData, operatorData, requireReceptionAck); } /** * @dev Burn tokens * @param from address token holder address * @param amount uint256 amount of tokens to burn * @param data bytes extra information provided by the token holder * @param operatorData bytes extra information provided by the operator (if any) */ function _burn( address from, uint256 amount, bytes memory data, bytes memory operatorData ) internal virtual { require(from != address(0), "ERC777: burn from the zero address"); address operator = _msgSender(); /* Chaged by SKALE: we swapped these lines to prevent delegation of burning tokens */ _callTokensToSend(operator, from, address(0), amount, data, operatorData); _beforeTokenTransfer(operator, from, address(0), amount); /* End of changed by SKALE */ // Update state variables _balances[from] = _balances[from].sub(amount, "ERC777: burn amount exceeds balance"); _totalSupply = _totalSupply.sub(amount); emit Burned(operator, from, amount, data, operatorData); emit Transfer(from, address(0), amount); } function _move( address operator, address from, address to, uint256 amount, bytes memory userData, bytes memory operatorData ) private { _beforeTokenTransfer(operator, from, to, amount); _balances[from] = _balances[from].sub(amount, "ERC777: transfer amount exceeds balance"); _balances[to] = _balances[to].add(amount); emit Sent(operator, from, to, amount, userData, operatorData); emit Transfer(from, to, amount); } /** * @dev See {ERC20-_approve}. * * Note that accounts cannot have allowance issued by their operators. */ function _approve(address holder, address spender, uint256 value) internal { require(holder != address(0), "ERC777: approve from the zero address"); require(spender != address(0), "ERC777: approve to the zero address"); _allowances[holder][spender] = value; emit Approval(holder, spender, value); } /** * @dev Call from.tokensToSend() if the interface is registered * @param operator address operator requesting the transfer * @param from address token holder address * @param to address recipient address * @param amount uint256 amount of tokens to transfer * @param userData bytes extra information provided by the token holder (if any) * @param operatorData bytes extra information provided by the operator (if any) */ function _callTokensToSend( address operator, address from, address to, uint256 amount, bytes memory userData, bytes memory operatorData ) /* Chaged by SKALE from private */ internal /* End of changed by SKALE */ /* Added by SKALE */ virtual /* End of added by SKALE */ { address implementer = _ERC1820_REGISTRY.getInterfaceImplementer(from, _TOKENS_SENDER_INTERFACE_HASH); if (implementer != address(0)) { IERC777Sender(implementer).tokensToSend(operator, from, to, amount, userData, operatorData); } } /** * @dev Call to.tokensReceived() if the interface is registered. Reverts if the recipient is a contract but * tokensReceived() was not registered for the recipient * @param operator address operator requesting the transfer * @param from address token holder address * @param to address recipient address * @param amount uint256 amount of tokens to transfer * @param userData bytes extra information provided by the token holder (if any) * @param operatorData bytes extra information provided by the operator (if any) * @param requireReceptionAck if true, contract recipients are required to implement ERC777TokensRecipient */ function _callTokensReceived( address operator, address from, address to, uint256 amount, bytes memory userData, bytes memory operatorData, bool requireReceptionAck ) /* Chaged by SKALE from private */ internal /* End of changed by SKALE */ /* Added by SKALE */ virtual /* End of added by SKALE */ { address implementer = _ERC1820_REGISTRY.getInterfaceImplementer(to, _TOKENS_RECIPIENT_INTERFACE_HASH); if (implementer != address(0)) { IERC777Recipient(implementer).tokensReceived(operator, from, to, amount, userData, operatorData); } else if (requireReceptionAck) { require(!to.isContract(), "ERC777: token recipient contract has no implementer for ERC777TokensRecipient"); } } /** * @dev Hook that is called before any token transfer. This includes * calls to {send}, {transfer}, {operatorSend}, minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, ``from``'s `tokenId` will be * transferred to `to`. * - when `from` is zero, `tokenId` will be minted for `to`. * - when `to` is zero, ``from``'s `tokenId` will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer(address operator, address from, address to, uint256 tokenId) internal virtual { } } contract OwnableUpgradeSafe is Initializable, ContextUpgradeSafe { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ function __Ownable_init() internal initializer { __Context_init_unchained(); __Ownable_init_unchained(); } function __Ownable_init_unchained() internal initializer { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), msgSender); } /** * @dev Returns the address of the current owner. */ function owner() public view returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(_owner == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { emit OwnershipTransferred(_owner, address(0)); _owner = address(0); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } uint256[49] private __gap; } abstract contract AccessControlUpgradeSafe is Initializable, ContextUpgradeSafe { function __AccessControl_init() internal initializer { __Context_init_unchained(); __AccessControl_init_unchained(); } function __AccessControl_init_unchained() internal initializer { } using EnumerableSet for EnumerableSet.AddressSet; using Address for address; struct RoleData { EnumerableSet.AddressSet members; bytes32 adminRole; } mapping (bytes32 => RoleData) private _roles; bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00; /** * @dev Emitted when `account` is granted `role`. * * `sender` is the account that originated the contract call, an admin role * bearer except when using {_setupRole}. */ event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender); /** * @dev Emitted when `account` is revoked `role`. * * `sender` is the account that originated the contract call: * - if using `revokeRole`, it is the admin role bearer * - if using `renounceRole`, it is the role bearer (i.e. `account`) */ event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender); /** * @dev Returns `true` if `account` has been granted `role`. */ function hasRole(bytes32 role, address account) public view returns (bool) { return _roles[role].members.contains(account); } /** * @dev Returns the number of accounts that have `role`. Can be used * together with {getRoleMember} to enumerate all bearers of a role. */ function getRoleMemberCount(bytes32 role) public view returns (uint256) { return _roles[role].members.length(); } /** * @dev Returns one of the accounts that have `role`. `index` must be a * value between 0 and {getRoleMemberCount}, non-inclusive. * * Role bearers are not sorted in any particular way, and their ordering may * change at any point. * * WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure * you perform all queries on the same block. See the following * https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post] * for more information. */ function getRoleMember(bytes32 role, uint256 index) public view returns (address) { return _roles[role].members.at(index); } /** * @dev Returns the admin role that controls `role`. See {grantRole} and * {revokeRole}. * * To change a role's admin, use {_setRoleAdmin}. */ function getRoleAdmin(bytes32 role) public view returns (bytes32) { return _roles[role].adminRole; } /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function grantRole(bytes32 role, address account) public virtual { require(hasRole(_roles[role].adminRole, _msgSender()), "AccessControl: sender must be an admin to grant"); _grantRole(role, account); } /** * @dev Revokes `role` from `account`. * * If `account` had been granted `role`, emits a {RoleRevoked} event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function revokeRole(bytes32 role, address account) public virtual { require(hasRole(_roles[role].adminRole, _msgSender()), "AccessControl: sender must be an admin to revoke"); _revokeRole(role, account); } /** * @dev Revokes `role` from the calling account. * * Roles are often managed via {grantRole} and {revokeRole}: this function's * purpose is to provide a mechanism for accounts to lose their privileges * if they are compromised (such as when a trusted device is misplaced). * * If the calling account had been granted `role`, emits a {RoleRevoked} * event. * * Requirements: * * - the caller must be `account`. */ function renounceRole(bytes32 role, address account) public virtual { require(account == _msgSender(), "AccessControl: can only renounce roles for self"); _revokeRole(role, account); } /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. Note that unlike {grantRole}, this function doesn't perform any * checks on the calling account. * * [WARNING] * ==== * This function should only be called from the constructor when setting * up the initial roles for the system. * * Using this function in any other way is effectively circumventing the admin * system imposed by {AccessControl}. * ==== */ function _setupRole(bytes32 role, address account) internal virtual { _grantRole(role, account); } /** * @dev Sets `adminRole` as ``role``'s admin role. */ function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual { _roles[role].adminRole = adminRole; } function _grantRole(bytes32 role, address account) private { if (_roles[role].members.add(account)) { emit RoleGranted(role, account, _msgSender()); } } function _revokeRole(bytes32 role, address account) private { if (_roles[role].members.remove(account)) { emit RoleRevoked(role, account, _msgSender()); } } uint256[49] private __gap; } contract ContractManager is OwnableUpgradeSafe { using StringUtils for string; using Address for address; // mapping of actual smart contracts addresses mapping (bytes32 => address) public contracts; event ContractUpgraded(string contractsName, address contractsAddress); function initialize() external initializer { OwnableUpgradeSafe.__Ownable_init(); } /** * Adds actual contract to mapping of actual contract addresses * @param contractsName - contracts name in skale manager system * @param newContractsAddress - contracts address in skale manager system */ function setContractsAddress(string calldata contractsName, address newContractsAddress) external onlyOwner { // check newContractsAddress is not equal to zero require(newContractsAddress != address(0), "New address is equal zero"); // create hash of contractsName bytes32 contractId = keccak256(abi.encodePacked(contractsName)); // check newContractsAddress is not equal the previous contract's address require(contracts[contractId] != newContractsAddress, "Contract is already added"); require(newContractsAddress.isContract(), "Given contracts address does not contain code"); // add newContractsAddress to mapping of actual contract addresses contracts[contractId] = newContractsAddress; emit ContractUpgraded(contractsName, newContractsAddress); } function getContract(string calldata name) external view returns (address contractAddress) { contractAddress = contracts[keccak256(abi.encodePacked(name))]; require(contractAddress != address(0), name.strConcat(" contract has not been found")); } } contract Permissions is AccessControlUpgradeSafe { using SafeMath for uint; using Address for address; ContractManager public contractManager; /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(_isOwner(), "Caller is not the owner"); _; } modifier onlyAdmin() { require(_isAdmin(msg.sender), "Caller is not an admin"); _; } /** * @dev allow - throws if called by any account and contract other than the owner * or `contractName` contract * @param contractName - human readable name of contract */ modifier allow(string memory contractName) { require( contractManager.contracts(keccak256(abi.encodePacked(contractName))) == msg.sender || _isOwner(), "Message sender is invalid"); _; } modifier allowTwo(string memory contractName1, string memory contractName2) { require( contractManager.contracts(keccak256(abi.encodePacked(contractName1))) == msg.sender || contractManager.contracts(keccak256(abi.encodePacked(contractName2))) == msg.sender || _isOwner(), "Message sender is invalid"); _; } modifier allowThree(string memory contractName1, string memory contractName2, string memory contractName3) { require( contractManager.contracts(keccak256(abi.encodePacked(contractName1))) == msg.sender || contractManager.contracts(keccak256(abi.encodePacked(contractName2))) == msg.sender || contractManager.contracts(keccak256(abi.encodePacked(contractName3))) == msg.sender || _isOwner(), "Message sender is invalid"); _; } function initialize(address contractManagerAddress) public virtual initializer { AccessControlUpgradeSafe.__AccessControl_init(); _setupRole(DEFAULT_ADMIN_ROLE, msg.sender); _setContractManager(contractManagerAddress); } function _isOwner() internal view returns (bool) { return hasRole(DEFAULT_ADMIN_ROLE, msg.sender); } function _isAdmin(address account) internal view returns (bool) { address skaleManagerAddress = contractManager.contracts(keccak256(abi.encodePacked("SkaleManager"))); if (skaleManagerAddress != address(0)) { AccessControlUpgradeSafe skaleManager = AccessControlUpgradeSafe(skaleManagerAddress); return skaleManager.hasRole(keccak256("ADMIN_ROLE"), account) || _isOwner(); } else { return _isOwner(); } } function _setContractManager(address contractManagerAddress) private { require(contractManagerAddress != address(0), "ContractManager address is not set"); require(contractManagerAddress.isContract(), "Address is not contract"); contractManager = ContractManager(contractManagerAddress); } } contract Pricing is Permissions { uint public constant INITIAL_PRICE = 5 * 10**6; uint public price; uint public totalNodes; uint public lastUpdated; function initNodes() external { Nodes nodes = Nodes(contractManager.getContract("Nodes")); totalNodes = nodes.getNumberOnlineNodes(); } function adjustPrice() external { ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); require(now > lastUpdated.add(constantsHolder.COOLDOWN_TIME()), "It's not a time to update a price"); checkAllNodes(); uint load = _getTotalLoad(); uint capacity = _getTotalCapacity(); bool networkIsOverloaded = load.mul(100) > constantsHolder.OPTIMAL_LOAD_PERCENTAGE().mul(capacity); uint loadDiff; if (networkIsOverloaded) { loadDiff = load.mul(100).sub(constantsHolder.OPTIMAL_LOAD_PERCENTAGE().mul(capacity)); } else { loadDiff = constantsHolder.OPTIMAL_LOAD_PERCENTAGE().mul(capacity).sub(load.mul(100)); } uint priceChangeSpeedMultipliedByCapacityAndMinPrice = constantsHolder.ADJUSTMENT_SPEED().mul(loadDiff).mul(price); uint timeSkipped = now.sub(lastUpdated); uint priceChange = priceChangeSpeedMultipliedByCapacityAndMinPrice .mul(timeSkipped) .div(constantsHolder.COOLDOWN_TIME()) .div(capacity) .div(constantsHolder.MIN_PRICE()); if (networkIsOverloaded) { assert(priceChange > 0); price = price.add(priceChange); } else { if (priceChange > price) { price = constantsHolder.MIN_PRICE(); } else { price = price.sub(priceChange); if (price < constantsHolder.MIN_PRICE()) { price = constantsHolder.MIN_PRICE(); } } } lastUpdated = now; } function getTotalLoadPercentage() external view returns (uint) { return _getTotalLoad().mul(100).div(_getTotalCapacity()); } function initialize(address newContractsAddress) public override initializer { Permissions.initialize(newContractsAddress); lastUpdated = now; price = INITIAL_PRICE; } function checkAllNodes() public { Nodes nodes = Nodes(contractManager.getContract("Nodes")); uint numberOfActiveNodes = nodes.getNumberOnlineNodes(); require(totalNodes != numberOfActiveNodes, "No any changes on nodes"); totalNodes = numberOfActiveNodes; } function _getTotalLoad() private view returns (uint) { SchainsInternal schainsInternal = SchainsInternal(contractManager.getContract("SchainsInternal")); uint load = 0; uint numberOfSchains = schainsInternal.numberOfSchains(); for (uint i = 0; i < numberOfSchains; i++) { bytes32 schain = schainsInternal.schainsAtSystem(i); uint numberOfNodesInSchain = schainsInternal.getNumberOfNodesInGroup(schain); uint part = schainsInternal.getSchainsPartOfNode(schain); load = load.add( numberOfNodesInSchain.mul(part) ); } return load; } function _getTotalCapacity() private view returns (uint) { Nodes nodes = Nodes(contractManager.getContract("Nodes")); ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); return nodes.getNumberOnlineNodes().mul(constantsHolder.TOTAL_SPACE_ON_NODE()); } } contract Punisher is Permissions, ILocker { /** * @dev Emitted when a slashing condition occurs. */ event Slash( uint validatorId, uint amount ); /** * @dev Emitted when a forgive condition occurs. */ event Forgive( address wallet, uint amount ); // holder => tokens mapping (address => uint) private _locked; /** * @dev Executes slashing on a validator and its delegations by an `amount` * of tokens. Currently, SkaleDKG is the only service allowed to execute * slashing. * * Emits a Slash event. * * @param validatorId uint validator to be slashed * @param amount uint slashed amount */ function slash(uint validatorId, uint amount) external allow("SkaleDKG") { ValidatorService validatorService = ValidatorService(contractManager.getContract("ValidatorService")); DelegationController delegationController = DelegationController( contractManager.getContract("DelegationController")); require(validatorService.validatorExists(validatorId), "Validator does not exist"); delegationController.confiscate(validatorId, amount); emit Slash(validatorId, amount); } /** * @dev Allows the Owner to forgive a slashing condition. * * Emits a Forgive event. * * @param holder address of the slashed * @param amount uint amount to be forgiven */ function forgive(address holder, uint amount) external onlyAdmin { DelegationController delegationController = DelegationController( contractManager.getContract("DelegationController")); require(!delegationController.hasUnprocessedSlashes(holder), "Not all slashes were calculated"); if (amount > _locked[holder]) { delete _locked[holder]; } else { _locked[holder] = _locked[holder].sub(amount); } emit Forgive(holder, amount); } /** * @dev See ILocker-getAndUpdateLockedAmount */ function getAndUpdateLockedAmount(address wallet) external override returns (uint) { return _getAndUpdateLockedAmount(wallet); } /** * @dev See ILocker-getAndUpdateForbiddenForDelegationAmount */ function getAndUpdateForbiddenForDelegationAmount(address wallet) external override returns (uint) { return _getAndUpdateLockedAmount(wallet); } function handleSlash(address holder, uint amount) external allow("DelegationController") { _locked[holder] = _locked[holder].add(amount); } function initialize(address contractManagerAddress) public override initializer { Permissions.initialize(contractManagerAddress); } // private function _getAndUpdateLockedAmount(address wallet) private returns (uint) { DelegationController delegationController = DelegationController( contractManager.getContract("DelegationController")); delegationController.processAllSlashes(wallet); return _locked[wallet]; } } contract Schains is Permissions { using StringUtils for string; using StringUtils for uint; struct SchainParameters { uint lifetime; uint8 typeOfSchain; uint16 nonce; string name; } // informs that Schain is created event SchainCreated( string name, address owner, uint partOfNode, uint lifetime, uint numberOfNodes, uint deposit, uint16 nonce, bytes32 schainId, uint time, uint gasSpend ); event SchainDeleted( address owner, string name, bytes32 indexed schainId ); event NodeRotated( bytes32 schainId, uint oldNode, uint newNode ); event NodeAdded( bytes32 schainId, uint newNode ); // informs that Schain based on some Nodes event SchainNodes( string name, bytes32 schainId, uint[] nodesInGroup, uint time, uint gasSpend ); bytes32 public constant SCHAIN_CREATOR_ROLE = keccak256("SCHAIN_CREATOR_ROLE"); /** * @dev addSchain - create Schain in the system * function could be run only by executor * @param from - owner of Schain * @param deposit - received amoung of SKL * @param data - Schain's data */ function addSchain(address from, uint deposit, bytes calldata data) external allow("SkaleManager") { SchainParameters memory schainParameters = _fallbackSchainParametersDataConverter(data); ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); uint schainCreationTimeStamp = constantsHolder.schainCreationTimeStamp(); uint minSchainLifetime = constantsHolder.minimalSchainLifetime(); require(now >= schainCreationTimeStamp, "It is not a time for creating Schain"); require( schainParameters.lifetime >= minSchainLifetime, "Minimal schain lifetime should be satisfied" ); require( getSchainPrice(schainParameters.typeOfSchain, schainParameters.lifetime) <= deposit, "Not enough money to create Schain"); _addSchain(from, deposit, schainParameters); } function addSchainByFoundation( uint lifetime, uint8 typeOfSchain, uint16 nonce, string calldata name ) external { require(hasRole(SCHAIN_CREATOR_ROLE, msg.sender), "Sender is not authorized to create schian"); SchainParameters memory schainParameters = SchainParameters({ lifetime: lifetime, typeOfSchain: typeOfSchain, nonce: nonce, name: name }); _addSchain(msg.sender, 0, schainParameters); } /** * @dev deleteSchain - removes Schain from the system * function could be run only by executor * @param from - owner of Schain * @param name - Schain name */ function deleteSchain(address from, string calldata name) external allow("SkaleManager") { NodeRotation nodeRotation = NodeRotation(contractManager.getContract("NodeRotation")); SchainsInternal schainsInternal = SchainsInternal(contractManager.getContract("SchainsInternal")); bytes32 schainId = keccak256(abi.encodePacked(name)); require( schainsInternal.isOwnerAddress(from, schainId), "Message sender is not an owner of Schain" ); address nodesAddress = contractManager.getContract("Nodes"); // removes Schain from Nodes uint[] memory nodesInGroup = schainsInternal.getNodesInGroup(schainId); uint8 partOfNode = schainsInternal.getSchainsPartOfNode(schainId); for (uint i = 0; i < nodesInGroup.length; i++) { uint schainIndex = schainsInternal.findSchainAtSchainsForNode( nodesInGroup[i], schainId ); if (schainsInternal.checkHoleForSchain(schainId, i)) { continue; } require( schainIndex < schainsInternal.getLengthOfSchainsForNode(nodesInGroup[i]), "Some Node does not contain given Schain"); schainsInternal.removeNodeFromSchain(nodesInGroup[i], schainId); schainsInternal.removeNodeFromExceptions(schainId, nodesInGroup[i]); if (!Nodes(nodesAddress).isNodeLeft(nodesInGroup[i])) { this.addSpace(nodesInGroup[i], partOfNode); } } schainsInternal.deleteGroup(schainId); schainsInternal.removeSchain(schainId, from); schainsInternal.removeHolesForSchain(schainId); nodeRotation.removeRotation(schainId); emit SchainDeleted(from, name, schainId); } function deleteSchainByRoot(string calldata name) external allow("SkaleManager") { NodeRotation nodeRotation = NodeRotation(contractManager.getContract("NodeRotation")); bytes32 schainId = keccak256(abi.encodePacked(name)); SchainsInternal schainsInternal = SchainsInternal( contractManager.getContract("SchainsInternal")); require(schainsInternal.isSchainExist(schainId), "Schain does not exist"); // removes Schain from Nodes uint[] memory nodesInGroup = schainsInternal.getNodesInGroup(schainId); uint8 partOfNode = schainsInternal.getSchainsPartOfNode(schainId); for (uint i = 0; i < nodesInGroup.length; i++) { uint schainIndex = schainsInternal.findSchainAtSchainsForNode( nodesInGroup[i], schainId ); if (schainsInternal.checkHoleForSchain(schainId, i)) { continue; } require( schainIndex < schainsInternal.getLengthOfSchainsForNode(nodesInGroup[i]), "Some Node does not contain given Schain"); schainsInternal.removeNodeFromSchain(nodesInGroup[i], schainId); schainsInternal.removeNodeFromExceptions(schainId, nodesInGroup[i]); this.addSpace(nodesInGroup[i], partOfNode); } schainsInternal.deleteGroup(schainId); address from = schainsInternal.getSchainOwner(schainId); schainsInternal.removeSchain(schainId, from); schainsInternal.removeHolesForSchain(schainId); nodeRotation.removeRotation(schainId); emit SchainDeleted(from, name, schainId); } function restartSchainCreation(string calldata name) external allow("SkaleManager") { NodeRotation nodeRotation = NodeRotation(contractManager.getContract("NodeRotation")); bytes32 schainId = keccak256(abi.encodePacked(name)); ISkaleDKG skaleDKG = ISkaleDKG(contractManager.getContract("SkaleDKG")); require(!skaleDKG.isLastDKGSuccesful(schainId), "DKG success"); SchainsInternal schainsInternal = SchainsInternal( contractManager.getContract("SchainsInternal")); require(schainsInternal.isAnyFreeNode(schainId), "No any free Nodes for rotation"); uint newNodeIndex = nodeRotation.selectNodeToGroup(schainId); skaleDKG.openChannel(schainId); emit NodeAdded(schainId, newNodeIndex); } /** * @dev addSpace - return occupied space to Node * @param nodeIndex - index of Node at common array of Nodes * @param partOfNode - divisor of given type of Schain */ function addSpace(uint nodeIndex, uint8 partOfNode) external allowTwo("Schains", "NodeRotation") { Nodes nodes = Nodes(contractManager.getContract("Nodes")); nodes.addSpaceToNode(nodeIndex, partOfNode); } /** * @dev verifySignature - verify signature which create Group by Groups BLS master public key * @param signatureA - first part of BLS signature * @param signatureB - second part of BLS signature * @param hash - hashed message * @param counter - smallest sub from square * @param hashA - first part of hashed message * @param hashB - second part of hashed message * @param schainName - name of the Schain * @return true - if correct, false - if not */ function verifySchainSignature( uint signatureA, uint signatureB, bytes32 hash, uint counter, uint hashA, uint hashB, string calldata schainName ) external view returns (bool) { SkaleVerifier skaleVerifier = SkaleVerifier(contractManager.getContract("SkaleVerifier")); G2Operations.G2Point memory publicKey = KeyStorage( contractManager.getContract("KeyStorage") ).getCommonPublicKey( keccak256(abi.encodePacked(schainName)) ); return skaleVerifier.verify( Fp2Operations.Fp2Point({ a: signatureA, b: signatureB }), hash, counter, hashA, hashB, publicKey ); } function initialize(address newContractsAddress) public override initializer { Permissions.initialize(newContractsAddress); } /** * @dev getSchainPrice - returns current price for given Schain * @param typeOfSchain - type of Schain * @param lifetime - lifetime of Schain * @return current price for given Schain */ function getSchainPrice(uint typeOfSchain, uint lifetime) public view returns (uint) { ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); uint nodeDeposit = constantsHolder.NODE_DEPOSIT(); uint numberOfNodes; uint8 divisor; (numberOfNodes, divisor) = getNodesDataFromTypeOfSchain(typeOfSchain); if (divisor == 0) { return 1e18; } else { uint up = nodeDeposit.mul(numberOfNodes.mul(lifetime.mul(2))); uint down = uint( uint(constantsHolder.SMALL_DIVISOR()) .mul(uint(constantsHolder.SECONDS_TO_YEAR())) .div(divisor) ); return up.div(down); } } /** * @dev getNodesDataFromTypeOfSchain - returns number if Nodes * and part of Node which needed to this Schain * @param typeOfSchain - type of Schain * @return numberOfNodes - number of Nodes needed to this Schain * @return partOfNode - divisor of given type of Schain */ function getNodesDataFromTypeOfSchain(uint typeOfSchain) public view returns (uint numberOfNodes, uint8 partOfNode) { ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); numberOfNodes = constantsHolder.NUMBER_OF_NODES_FOR_SCHAIN(); if (typeOfSchain == 1) { partOfNode = constantsHolder.SMALL_DIVISOR() / constantsHolder.SMALL_DIVISOR(); } else if (typeOfSchain == 2) { partOfNode = constantsHolder.SMALL_DIVISOR() / constantsHolder.MEDIUM_DIVISOR(); } else if (typeOfSchain == 3) { partOfNode = constantsHolder.SMALL_DIVISOR() / constantsHolder.LARGE_DIVISOR(); } else if (typeOfSchain == 4) { partOfNode = 0; numberOfNodes = constantsHolder.NUMBER_OF_NODES_FOR_TEST_SCHAIN(); } else if (typeOfSchain == 5) { partOfNode = constantsHolder.SMALL_DIVISOR() / constantsHolder.MEDIUM_TEST_DIVISOR(); numberOfNodes = constantsHolder.NUMBER_OF_NODES_FOR_MEDIUM_TEST_SCHAIN(); } else { revert("Bad schain type"); } } function _initializeSchainInSchainsInternal( string memory name, address from, uint deposit, uint lifetime) private { address dataAddress = contractManager.getContract("SchainsInternal"); require(SchainsInternal(dataAddress).isSchainNameAvailable(name), "Schain name is not available"); // initialize Schain SchainsInternal(dataAddress).initializeSchain( name, from, lifetime, deposit); SchainsInternal(dataAddress).setSchainIndex(keccak256(abi.encodePacked(name)), from); } /** * @dev fallbackSchainParameterDataConverter - converts data from bytes to normal parameters * @param data - concatenated parameters * @return schainParameters Parsed lifetime, typeOfSchain, nonce and name */ function _fallbackSchainParametersDataConverter(bytes memory data) private pure returns (SchainParameters memory schainParameters) { (schainParameters.lifetime, schainParameters.typeOfSchain, schainParameters.nonce, schainParameters.name) = abi.decode(data, (uint, uint8, uint16, string)); } /** * @dev _createGroupForSchain - creates Group for Schain * @param schainName - name of Schain * @param schainId - hash by name of Schain * @param numberOfNodes - number of Nodes needed for this Schain * @param partOfNode - divisor of given type of Schain */ function _createGroupForSchain( string memory schainName, bytes32 schainId, uint numberOfNodes, uint8 partOfNode ) private { SchainsInternal schainsInternal = SchainsInternal(contractManager.getContract("SchainsInternal")); uint[] memory nodesInGroup = schainsInternal.createGroupForSchain(schainId, numberOfNodes, partOfNode); ISkaleDKG(contractManager.getContract("SkaleDKG")).openChannel(schainId); emit SchainNodes( schainName, schainId, nodesInGroup, block.timestamp, gasleft()); } /** * @dev _addSchain - create Schain in the system * function could be run only by executor * @param from - owner of Schain * @param deposit - received amoung of SKL * @param schainParameters - Schain's data */ function _addSchain(address from, uint deposit, SchainParameters memory schainParameters) private { uint numberOfNodes; uint8 partOfNode; require(schainParameters.typeOfSchain <= 5, "Invalid type of Schain"); //initialize Schain _initializeSchainInSchainsInternal( schainParameters.name, from, deposit, schainParameters.lifetime); // create a group for Schain (numberOfNodes, partOfNode) = getNodesDataFromTypeOfSchain(schainParameters.typeOfSchain); _createGroupForSchain( schainParameters.name, keccak256(abi.encodePacked(schainParameters.name)), numberOfNodes, partOfNode ); emit SchainCreated( schainParameters.name, from, partOfNode, schainParameters.lifetime, numberOfNodes, deposit, schainParameters.nonce, keccak256(abi.encodePacked(schainParameters.name)), block.timestamp, gasleft()); } } contract SchainsInternal is Permissions { struct Schain { string name; address owner; uint indexInOwnerList; uint8 partOfNode; uint lifetime; uint startDate; uint startBlock; uint deposit; uint64 index; } // mapping which contain all schains mapping (bytes32 => Schain) public schains; mapping (bytes32 => bool) public isSchainActive; mapping (bytes32 => uint[]) public schainsGroups; mapping (bytes32 => mapping (uint => bool)) private _exceptionsForGroups; // mapping shows schains by owner's address mapping (address => bytes32[]) public schainIndexes; // mapping shows schains which Node composed in mapping (uint => bytes32[]) public schainsForNodes; mapping (uint => uint[]) public holesForNodes; mapping (bytes32 => uint[]) public holesForSchains; // array which contain all schains bytes32[] public schainsAtSystem; uint64 public numberOfSchains; // total resources that schains occupied uint public sumOfSchainsResources; mapping (bytes32 => bool) public usedSchainNames; /** * @dev initializeSchain - initializes Schain * function could be run only by executor * @param name - SChain name * @param from - Schain owner * @param lifetime - initial lifetime of Schain * @param deposit - given amount of SKL */ function initializeSchain( string calldata name, address from, uint lifetime, uint deposit) external allow("Schains") { bytes32 schainId = keccak256(abi.encodePacked(name)); schains[schainId].name = name; schains[schainId].owner = from; schains[schainId].startDate = block.timestamp; schains[schainId].startBlock = block.number; schains[schainId].lifetime = lifetime; schains[schainId].deposit = deposit; schains[schainId].index = numberOfSchains; isSchainActive[schainId] = true; numberOfSchains++; schainsAtSystem.push(schainId); usedSchainNames[schainId] = true; } function createGroupForSchain( bytes32 schainId, uint numberOfNodes, uint8 partOfNode ) external allow("Schains") returns (uint[] memory) { ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); schains[schainId].partOfNode = partOfNode; if (partOfNode > 0) { sumOfSchainsResources = sumOfSchainsResources.add( numberOfNodes.mul(constantsHolder.TOTAL_SPACE_ON_NODE()).div(partOfNode) ); } return _generateGroup(schainId, numberOfNodes); } /** * @dev setSchainIndex - adds Schain's hash to owner * function could be run only by executor * @param schainId - hash by Schain name * @param from - Schain owner */ function setSchainIndex(bytes32 schainId, address from) external allow("Schains") { schains[schainId].indexInOwnerList = schainIndexes[from].length; schainIndexes[from].push(schainId); } /** * @dev changeLifetime - changes Lifetime for Schain * function could be run only by executor * @param schainId - hash by Schain name * @param lifetime - time which would be added to lifetime of Schain * @param deposit - amount of SKL which payed for this time */ function changeLifetime(bytes32 schainId, uint lifetime, uint deposit) external allow("Schains") { schains[schainId].deposit = schains[schainId].deposit.add(deposit); schains[schainId].lifetime = schains[schainId].lifetime.add(lifetime); } /** * @dev removeSchain - removes Schain from the system * function could be run only by executor * @param schainId - hash by Schain name * @param from - owner of Schain */ function removeSchain(bytes32 schainId, address from) external allow("Schains") { isSchainActive[schainId] = false; uint length = schainIndexes[from].length; uint index = schains[schainId].indexInOwnerList; if (index != length.sub(1)) { bytes32 lastSchainId = schainIndexes[from][length.sub(1)]; schains[lastSchainId].indexInOwnerList = index; schainIndexes[from][index] = lastSchainId; } schainIndexes[from].pop(); // TODO: // optimize for (uint i = 0; i + 1 < schainsAtSystem.length; i++) { if (schainsAtSystem[i] == schainId) { schainsAtSystem[i] = schainsAtSystem[schainsAtSystem.length.sub(1)]; break; } } schainsAtSystem.pop(); delete schains[schainId]; numberOfSchains--; } function removeNodeFromSchain( uint nodeIndex, bytes32 schainHash ) external allowThree("NodeRotation", "SkaleDKG", "Schains") { uint indexOfNode = _findNode(schainHash, nodeIndex); uint indexOfLastNode = schainsGroups[schainHash].length.sub(1); if (indexOfNode == indexOfLastNode) { schainsGroups[schainHash].pop(); } else { delete schainsGroups[schainHash][indexOfNode]; if (holesForSchains[schainHash].length > 0 && holesForSchains[schainHash][0] > indexOfNode) { uint hole = holesForSchains[schainHash][0]; holesForSchains[schainHash][0] = indexOfNode; holesForSchains[schainHash].push(hole); } else { holesForSchains[schainHash].push(indexOfNode); } } uint schainId = findSchainAtSchainsForNode(nodeIndex, schainHash); removeSchainForNode(nodeIndex, schainId); } function removeNodeFromExceptions(bytes32 schainHash, uint nodeIndex) external allow("Schains") { _exceptionsForGroups[schainHash][nodeIndex] = false; } /** * @dev deleteGroup - delete Group from Data contract * function could be run only by executor * @param schainId - Groups identifier */ function deleteGroup(bytes32 schainId) external allow("Schains") { // delete channel ISkaleDKG skaleDKG = ISkaleDKG(contractManager.getContract("SkaleDKG")); delete schainsGroups[schainId]; if (skaleDKG.isChannelOpened(schainId)) { skaleDKG.deleteChannel(schainId); } } /** * @dev setException - sets a Node like exception * function could be run only by executor * @param schainId - Groups identifier * @param nodeIndex - index of Node which would be notes like exception */ function setException(bytes32 schainId, uint nodeIndex) external allowTwo("Schains", "NodeRotation") { _exceptionsForGroups[schainId][nodeIndex] = true; } /** * @dev setNodeInGroup - adds Node to Group * function could be run only by executor * @param schainId - Groups * @param nodeIndex - index of Node which would be added to the Group */ function setNodeInGroup(bytes32 schainId, uint nodeIndex) external allowTwo("Schains", "NodeRotation") { if (holesForSchains[schainId].length == 0) { schainsGroups[schainId].push(nodeIndex); } else { schainsGroups[schainId][holesForSchains[schainId][0]] = nodeIndex; uint min = uint(-1); uint index = 0; for (uint i = 1; i < holesForSchains[schainId].length; i++) { if (min > holesForSchains[schainId][i]) { min = holesForSchains[schainId][i]; index = i; } } if (min == uint(-1)) { delete holesForSchains[schainId]; } else { holesForSchains[schainId][0] = min; holesForSchains[schainId][index] = holesForSchains[schainId][holesForSchains[schainId].length - 1]; holesForSchains[schainId].pop(); } } } function removeHolesForSchain(bytes32 schainHash) external allow("Schains") { delete holesForSchains[schainHash]; } /** * @dev getSchains - gets all Schains at the system * @return array of hashes by Schain names */ function getSchains() external view returns (bytes32[] memory) { return schainsAtSystem; } /** * @dev getSchainsPartOfNode - gets occupied space for given Schain * @param schainId - hash by Schain name * @return occupied space */ function getSchainsPartOfNode(bytes32 schainId) external view returns (uint8) { return schains[schainId].partOfNode; } /** * @dev getSchainListSize - gets number of created Schains at the system by owner * @param from - owner of Schain * return number of Schains */ function getSchainListSize(address from) external view returns (uint) { return schainIndexes[from].length; } /** * @dev getSchainIdsByAddress - gets array of hashes by Schain names which owned by `from` * @param from - owner of some Schains * @return array of hashes by Schain names */ function getSchainIdsByAddress(address from) external view returns (bytes32[] memory) { return schainIndexes[from]; } /** * @dev getSchainIdsForNode - returns array of hashes by Schain names, * which given Node composed * @param nodeIndex - index of Node * @return array of hashes by Schain names */ function getSchainIdsForNode(uint nodeIndex) external view returns (bytes32[] memory) { return schainsForNodes[nodeIndex]; } function getSchainOwner(bytes32 schainId) external view returns (address) { return schains[schainId].owner; } /** * @dev isSchainNameAvailable - checks is given name available * Need to delete - copy of web3.utils.soliditySha3 * @param name - possible new name of Schain * @return if available - true, else - false */ function isSchainNameAvailable(string calldata name) external view returns (bool) { bytes32 schainId = keccak256(abi.encodePacked(name)); return schains[schainId].owner == address(0) && !usedSchainNames[schainId]; } /** * @dev isTimeExpired - checks is Schain lifetime expired * @param schainId - hash by Schain name * @return if expired - true, else - false */ function isTimeExpired(bytes32 schainId) external view returns (bool) { return uint(schains[schainId].startDate).add(schains[schainId].lifetime) < block.timestamp; } /** * @dev isOwnerAddress - checks is `from` - owner of `schainId` Schain * @param from - owner of Schain * @param schainId - hash by Schain name * @return if owner - true, else - false */ function isOwnerAddress(address from, bytes32 schainId) external view returns (bool) { return schains[schainId].owner == from; } function isSchainExist(bytes32 schainId) external view returns (bool) { return keccak256(abi.encodePacked(schains[schainId].name)) != keccak256(abi.encodePacked("")); } function getSchainName(bytes32 schainId) external view returns (string memory) { return schains[schainId].name; } function getActiveSchain(uint nodeIndex) external view returns (bytes32) { for (uint i = schainsForNodes[nodeIndex].length; i > 0; i--) { if (schainsForNodes[nodeIndex][i - 1] != bytes32(0)) { return schainsForNodes[nodeIndex][i - 1]; } } return bytes32(0); } function getActiveSchains(uint nodeIndex) external view returns (bytes32[] memory activeSchains) { uint activeAmount = 0; for (uint i = 0; i < schainsForNodes[nodeIndex].length; i++) { if (schainsForNodes[nodeIndex][i] != bytes32(0)) { activeAmount++; } } uint cursor = 0; activeSchains = new bytes32[](activeAmount); for (uint i = schainsForNodes[nodeIndex].length; i > 0; i--) { if (schainsForNodes[nodeIndex][i - 1] != bytes32(0)) { activeSchains[cursor++] = schainsForNodes[nodeIndex][i - 1]; } } } /** * @dev getNumberOfNodesInGroup - shows number of Nodes in Group * @param schainId - Groups identifier * @return number of Nodes in Group */ function getNumberOfNodesInGroup(bytes32 schainId) external view returns (uint) { return schainsGroups[schainId].length; } /** * @dev getNodesInGroup - shows Nodes in Group * @param schainId - Groups identifier * @return array of indexes of Nodes in Group */ function getNodesInGroup(bytes32 schainId) external view returns (uint[] memory) { return schainsGroups[schainId]; } /** * @dev getNodeIndexInGroup - looks for Node in Group * @param schainId - Groups identifier * @param nodeId - Nodes identifier * @return index of Node in Group */ function getNodeIndexInGroup(bytes32 schainId, uint nodeId) external view returns (uint) { for (uint index = 0; index < schainsGroups[schainId].length; index++) { if (schainsGroups[schainId][index] == nodeId) { return index; } } return schainsGroups[schainId].length; } function isAnyFreeNode(bytes32 schainId) external view returns (bool) { Nodes nodes = Nodes(contractManager.getContract("Nodes")); uint8 space = schains[schainId].partOfNode; uint[] memory nodesWithFreeSpace = nodes.getNodesWithFreeSpace(space); for (uint i = 0; i < nodesWithFreeSpace.length; i++) { if (_isCorrespond(schainId, nodesWithFreeSpace[i])) { return true; } } return false; } function checkException(bytes32 schainId, uint nodeIndex) external view returns (bool) { return _exceptionsForGroups[schainId][nodeIndex]; } function checkHoleForSchain(bytes32 schainHash, uint indexOfNode) external view returns (bool) { for (uint i = 0; i < holesForSchains[schainHash].length; i++) { if (holesForSchains[schainHash][i] == indexOfNode) { return true; } } return false; } function initialize(address newContractsAddress) public override initializer { Permissions.initialize(newContractsAddress); numberOfSchains = 0; sumOfSchainsResources = 0; } /** * @dev addSchainForNode - adds Schain hash to Node * function could be run only by executor * @param nodeIndex - index of Node * @param schainId - hash by Schain name */ function addSchainForNode(uint nodeIndex, bytes32 schainId) public allowTwo("Schains", "NodeRotation") { if (holesForNodes[nodeIndex].length == 0) { schainsForNodes[nodeIndex].push(schainId); } else { schainsForNodes[nodeIndex][holesForNodes[nodeIndex][0]] = schainId; uint min = uint(-1); uint index = 0; for (uint i = 1; i < holesForNodes[nodeIndex].length; i++) { if (min > holesForNodes[nodeIndex][i]) { min = holesForNodes[nodeIndex][i]; index = i; } } if (min == uint(-1)) { delete holesForNodes[nodeIndex]; } else { holesForNodes[nodeIndex][0] = min; holesForNodes[nodeIndex][index] = holesForNodes[nodeIndex][holesForNodes[nodeIndex].length - 1]; holesForNodes[nodeIndex].pop(); } } } /** * @dev removesSchainForNode - clean given Node of Schain * function could be run only by executor * @param nodeIndex - index of Node * @param schainIndex - index of Schain in schainsForNodes array by this Node */ function removeSchainForNode(uint nodeIndex, uint schainIndex) public allowThree("NodeRotation", "SkaleDKG", "Schains") { uint length = schainsForNodes[nodeIndex].length; if (schainIndex == length.sub(1)) { schainsForNodes[nodeIndex].pop(); } else { schainsForNodes[nodeIndex][schainIndex] = bytes32(0); if (holesForNodes[nodeIndex].length > 0 && holesForNodes[nodeIndex][0] > schainIndex) { uint hole = holesForNodes[nodeIndex][0]; holesForNodes[nodeIndex][0] = schainIndex; holesForNodes[nodeIndex].push(hole); } else { holesForNodes[nodeIndex].push(schainIndex); } } } /** * @dev getLengthOfSchainsForNode - returns number of Schains which contain given Node * @param nodeIndex - index of Node * @return number of Schains */ function getLengthOfSchainsForNode(uint nodeIndex) public view returns (uint) { return schainsForNodes[nodeIndex].length; } /** * @dev findSchainAtSchainsForNode - finds index of Schain at schainsForNode array * @param nodeIndex - index of Node at common array of Nodes * @param schainId - hash of name of Schain * @return index of Schain at schainsForNode array */ function findSchainAtSchainsForNode(uint nodeIndex, bytes32 schainId) public view returns (uint) { uint length = getLengthOfSchainsForNode(nodeIndex); for (uint i = 0; i < length; i++) { if (schainsForNodes[nodeIndex][i] == schainId) { return i; } } return length; } function isEnoughNodes(bytes32 schainId) public view returns (uint[] memory result) { Nodes nodes = Nodes(contractManager.getContract("Nodes")); uint8 space = schains[schainId].partOfNode; uint[] memory nodesWithFreeSpace = nodes.getNodesWithFreeSpace(space); uint counter = 0; for (uint i = 0; i < nodesWithFreeSpace.length; i++) { if (!_isCorrespond(schainId, nodesWithFreeSpace[i])) { counter++; } } if (counter < nodesWithFreeSpace.length) { result = new uint[](nodesWithFreeSpace.length.sub(counter)); counter = 0; for (uint i = 0; i < nodesWithFreeSpace.length; i++) { if (_isCorrespond(schainId, nodesWithFreeSpace[i])) { result[counter] = nodesWithFreeSpace[i]; counter++; } } } } /** * @dev _generateGroup - generates Group for Schain * @param schainId - index of Group */ function _generateGroup(bytes32 schainId, uint numberOfNodes) private returns (uint[] memory nodesInGroup) { Nodes nodes = Nodes(contractManager.getContract("Nodes")); uint8 space = schains[schainId].partOfNode; nodesInGroup = new uint[](numberOfNodes); uint[] memory possibleNodes = isEnoughNodes(schainId); require(possibleNodes.length >= nodesInGroup.length, "Not enough nodes to create Schain"); uint ignoringTail = 0; uint random = uint(keccak256(abi.encodePacked(uint(blockhash(block.number.sub(1))), schainId))); for (uint i = 0; i < nodesInGroup.length; ++i) { uint index = random % (possibleNodes.length.sub(ignoringTail)); uint node = possibleNodes[index]; nodesInGroup[i] = node; _swap(possibleNodes, index, possibleNodes.length.sub(ignoringTail).sub(1)); ++ignoringTail; _exceptionsForGroups[schainId][node] = true; addSchainForNode(node, schainId); require(nodes.removeSpaceFromNode(node, space), "Could not remove space from Node"); } // set generated group schainsGroups[schainId] = nodesInGroup; } function _isCorrespond(bytes32 schainId, uint nodeIndex) private view returns (bool) { Nodes nodes = Nodes(contractManager.getContract("Nodes")); return !_exceptionsForGroups[schainId][nodeIndex] && nodes.isNodeActive(nodeIndex); } function _swap(uint[] memory array, uint index1, uint index2) private pure { uint buffer = array[index1]; array[index1] = array[index2]; array[index2] = buffer; } /** * @dev findNode - find local index of Node in Schain * @param schainId - Groups identifier * @param nodeIndex - global index of Node * @return local index of Node in Schain */ function _findNode(bytes32 schainId, uint nodeIndex) private view returns (uint) { uint[] memory nodesInGroup = schainsGroups[schainId]; uint index; for (index = 0; index < nodesInGroup.length; index++) { if (nodesInGroup[index] == nodeIndex) { return index; } } return index; } } contract SkaleDKG is Permissions, ISkaleDKG { using Fp2Operations for Fp2Operations.Fp2Point; using G2Operations for G2Operations.G2Point; struct Channel { bool active; uint n; uint startedBlockTimestamp; uint startedBlock; } struct ProcessDKG { uint numberOfBroadcasted; uint numberOfCompleted; bool[] broadcasted; bool[] completed; } struct ComplaintData { uint nodeToComplaint; uint fromNodeToComplaint; uint startComplaintBlockTimestamp; } struct KeyShare { bytes32[2] publicKey; bytes32 share; } uint public constant COMPLAINT_TIMELIMIT = 1800; mapping(bytes32 => Channel) public channels; mapping(bytes32 => uint) public lastSuccesfulDKG; mapping(bytes32 => ProcessDKG) public dkgProcess; mapping(bytes32 => ComplaintData) public complaints; mapping(bytes32 => uint) public startAlrightTimestamp; mapping(bytes32 => mapping(uint => bytes32)) public hashedData; event ChannelOpened(bytes32 groupIndex); event ChannelClosed(bytes32 groupIndex); event BroadcastAndKeyShare( bytes32 indexed groupIndex, uint indexed fromNode, G2Operations.G2Point[] verificationVector, KeyShare[] secretKeyContribution ); event AllDataReceived(bytes32 indexed groupIndex, uint nodeIndex); event SuccessfulDKG(bytes32 indexed groupIndex); event BadGuy(uint nodeIndex); event FailedDKG(bytes32 indexed groupIndex); event ComplaintSent(bytes32 indexed groupIndex, uint indexed fromNodeIndex, uint indexed toNodeIndex); event NewGuy(uint nodeIndex); event ComplaintError(string error); modifier correctGroup(bytes32 groupIndex) { require(channels[groupIndex].active, "Group is not created"); _; } modifier correctGroupWithoutRevert(bytes32 groupIndex) { if (!channels[groupIndex].active) { emit ComplaintError("Group is not created"); } else { _; } } modifier correctNode(bytes32 groupIndex, uint nodeIndex) { uint index = _nodeIndexInSchain(groupIndex, nodeIndex); require( index < channels[groupIndex].n, "Node is not in this group"); _; } modifier correctNodeWithoutRevert(bytes32 groupIndex, uint nodeIndex) { uint index = _nodeIndexInSchain(groupIndex, nodeIndex); if (index >= channels[groupIndex].n) { emit ComplaintError("Node is not in this group"); } else { _; } } function openChannel(bytes32 groupIndex) external override allowTwo("Schains","NodeRotation") { _openChannel(groupIndex); } function deleteChannel(bytes32 groupIndex) external override allow("SchainsInternal") { require(channels[groupIndex].active, "Channel is not created"); delete channels[groupIndex]; delete dkgProcess[groupIndex]; delete complaints[groupIndex]; KeyStorage(contractManager.getContract("KeyStorage")).deleteKey(groupIndex); } function broadcast( bytes32 groupIndex, uint nodeIndex, G2Operations.G2Point[] calldata verificationVector, KeyShare[] calldata secretKeyContribution ) external correctGroup(groupIndex) { require(_isNodeByMessageSender(nodeIndex, msg.sender), "Node does not exist for message sender"); uint n = channels[groupIndex].n; require(verificationVector.length == getT(n), "Incorrect number of verification vectors"); require( secretKeyContribution.length == n, "Incorrect number of secret key shares" ); uint index = _nodeIndexInSchain(groupIndex, nodeIndex); require(index < channels[groupIndex].n, "Node is not in this group"); require(!dkgProcess[groupIndex].broadcasted[index], "This node has already broadcasted"); dkgProcess[groupIndex].broadcasted[index] = true; dkgProcess[groupIndex].numberOfBroadcasted++; if (dkgProcess[groupIndex].numberOfBroadcasted == channels[groupIndex].n) { startAlrightTimestamp[groupIndex] = now; } hashedData[groupIndex][index] = _hashData(secretKeyContribution, verificationVector); KeyStorage keyStorage = KeyStorage(contractManager.getContract("KeyStorage")); keyStorage.adding(groupIndex, verificationVector[0]); emit BroadcastAndKeyShare( groupIndex, nodeIndex, verificationVector, secretKeyContribution ); } function complaint(bytes32 groupIndex, uint fromNodeIndex, uint toNodeIndex) external correctGroupWithoutRevert(groupIndex) correctNode(groupIndex, fromNodeIndex) correctNodeWithoutRevert(groupIndex, toNodeIndex) { require(_isNodeByMessageSender(fromNodeIndex, msg.sender), "Node does not exist for message sender"); require(isNodeBroadcasted(groupIndex, fromNodeIndex), "Node has not broadcasted"); bool broadcasted = isNodeBroadcasted(groupIndex, toNodeIndex); if (broadcasted) { _handleComplaintWhenBroadcasted(groupIndex, fromNodeIndex, toNodeIndex); return; } else { // not broadcasted in 30 min if (channels[groupIndex].startedBlockTimestamp.add(COMPLAINT_TIMELIMIT) <= block.timestamp) { _finalizeSlashing(groupIndex, toNodeIndex); return; } emit ComplaintError("Complaint sent too early"); return; } } function response( bytes32 groupIndex, uint fromNodeIndex, uint secretNumber, G2Operations.G2Point calldata multipliedShare, G2Operations.G2Point[] calldata verificationVector, KeyShare[] calldata secretKeyContribution ) external correctGroup(groupIndex) { uint indexOnSchain = _nodeIndexInSchain(groupIndex, fromNodeIndex); require(indexOnSchain < channels[groupIndex].n, "Node is not in this group"); require(complaints[groupIndex].nodeToComplaint == fromNodeIndex, "Not this Node"); require(_isNodeByMessageSender(fromNodeIndex, msg.sender), "Node does not exist for message sender"); require( hashedData[groupIndex][indexOnSchain] == _hashData(secretKeyContribution, verificationVector), "Broadcasted Data is not correct" ); uint index = _nodeIndexInSchain(groupIndex, complaints[groupIndex].fromNodeToComplaint); _verifyDataAndSlash( groupIndex, indexOnSchain, secretNumber, multipliedShare, verificationVector, secretKeyContribution[index].share ); } function alright(bytes32 groupIndex, uint fromNodeIndex) external correctGroup(groupIndex) correctNode(groupIndex, fromNodeIndex) { require(_isNodeByMessageSender(fromNodeIndex, msg.sender), "Node does not exist for message sender"); uint index = _nodeIndexInSchain(groupIndex, fromNodeIndex); uint numberOfParticipant = channels[groupIndex].n; require(numberOfParticipant == dkgProcess[groupIndex].numberOfBroadcasted, "Still Broadcasting phase"); require( complaints[groupIndex].fromNodeToComplaint != fromNodeIndex || (fromNodeIndex == 0 && complaints[groupIndex].startComplaintBlockTimestamp == 0), "Node has already sent complaint" ); require(!dkgProcess[groupIndex].completed[index], "Node is already alright"); dkgProcess[groupIndex].completed[index] = true; dkgProcess[groupIndex].numberOfCompleted++; emit AllDataReceived(groupIndex, fromNodeIndex); if (dkgProcess[groupIndex].numberOfCompleted == numberOfParticipant) { _setSuccesfulDKG(groupIndex); } } function getChannelStartedTime(bytes32 groupIndex) external view returns (uint) { return channels[groupIndex].startedBlockTimestamp; } function getChannelStartedBlock(bytes32 groupIndex) external view returns (uint) { return channels[groupIndex].startedBlock; } function getNumberOfBroadcasted(bytes32 groupIndex) external view returns (uint) { return dkgProcess[groupIndex].numberOfBroadcasted; } function getNumberOfCompleted(bytes32 groupIndex) external view returns (uint) { return dkgProcess[groupIndex].numberOfCompleted; } function getTimeOfLastSuccesfulDKG(bytes32 groupIndex) external view returns (uint) { return lastSuccesfulDKG[groupIndex]; } function getComplaintData(bytes32 groupIndex) external view returns (uint, uint) { return (complaints[groupIndex].fromNodeToComplaint, complaints[groupIndex].nodeToComplaint); } function getComplaintStartedTime(bytes32 groupIndex) external view returns (uint) { return complaints[groupIndex].startComplaintBlockTimestamp; } function getAlrightStartedTime(bytes32 groupIndex) external view returns (uint) { return startAlrightTimestamp[groupIndex]; } function isChannelOpened(bytes32 groupIndex) external override view returns (bool) { return channels[groupIndex].active; } function isLastDKGSuccesful(bytes32 groupIndex) external override view returns (bool) { return channels[groupIndex].startedBlockTimestamp <= lastSuccesfulDKG[groupIndex]; } function isBroadcastPossible(bytes32 groupIndex, uint nodeIndex) external view returns (bool) { uint index = _nodeIndexInSchain(groupIndex, nodeIndex); return channels[groupIndex].active && index < channels[groupIndex].n && _isNodeByMessageSender(nodeIndex, msg.sender) && !dkgProcess[groupIndex].broadcasted[index]; } function isComplaintPossible( bytes32 groupIndex, uint fromNodeIndex, uint toNodeIndex ) external view returns (bool) { uint indexFrom = _nodeIndexInSchain(groupIndex, fromNodeIndex); uint indexTo = _nodeIndexInSchain(groupIndex, toNodeIndex); bool complaintSending = ( complaints[groupIndex].nodeToComplaint == uint(-1) && dkgProcess[groupIndex].broadcasted[indexTo] && !dkgProcess[groupIndex].completed[indexFrom] ) || ( dkgProcess[groupIndex].broadcasted[indexTo] && complaints[groupIndex].startComplaintBlockTimestamp.add(COMPLAINT_TIMELIMIT) <= block.timestamp && complaints[groupIndex].nodeToComplaint == toNodeIndex ) || ( !dkgProcess[groupIndex].broadcasted[indexTo] && complaints[groupIndex].nodeToComplaint == uint(-1) && channels[groupIndex].startedBlockTimestamp.add(COMPLAINT_TIMELIMIT) <= block.timestamp ) || ( complaints[groupIndex].nodeToComplaint == uint(-1) && isEveryoneBroadcasted(groupIndex) && dkgProcess[groupIndex].completed[indexFrom] && !dkgProcess[groupIndex].completed[indexTo] && startAlrightTimestamp[groupIndex].add(COMPLAINT_TIMELIMIT) <= block.timestamp ); return channels[groupIndex].active && indexFrom < channels[groupIndex].n && indexTo < channels[groupIndex].n && dkgProcess[groupIndex].broadcasted[indexFrom] && _isNodeByMessageSender(fromNodeIndex, msg.sender) && complaintSending; } function isAlrightPossible(bytes32 groupIndex, uint nodeIndex) external view returns (bool) { uint index = _nodeIndexInSchain(groupIndex, nodeIndex); return channels[groupIndex].active && index < channels[groupIndex].n && _isNodeByMessageSender(nodeIndex, msg.sender) && channels[groupIndex].n == dkgProcess[groupIndex].numberOfBroadcasted && (complaints[groupIndex].fromNodeToComplaint != nodeIndex || (nodeIndex == 0 && complaints[groupIndex].startComplaintBlockTimestamp == 0)) && !dkgProcess[groupIndex].completed[index]; } function isResponsePossible(bytes32 groupIndex, uint nodeIndex) external view returns (bool) { uint index = _nodeIndexInSchain(groupIndex, nodeIndex); return channels[groupIndex].active && index < channels[groupIndex].n && _isNodeByMessageSender(nodeIndex, msg.sender) && complaints[groupIndex].nodeToComplaint == nodeIndex; } function initialize(address contractsAddress) public override initializer { Permissions.initialize(contractsAddress); } function isNodeBroadcasted(bytes32 groupIndex, uint nodeIndex) public view returns (bool) { uint index = _nodeIndexInSchain(groupIndex, nodeIndex); return index < channels[groupIndex].n && dkgProcess[groupIndex].broadcasted[index]; } function isEveryoneBroadcasted(bytes32 groupIndex) public view returns (bool) { return channels[groupIndex].n == dkgProcess[groupIndex].numberOfBroadcasted; } function isAllDataReceived(bytes32 groupIndex, uint nodeIndex) public view returns (bool) { uint index = _nodeIndexInSchain(groupIndex, nodeIndex); return dkgProcess[groupIndex].completed[index]; } function getT(uint n) public pure returns (uint) { return n.mul(2).add(1).div(3); } function _setSuccesfulDKG(bytes32 groupIndex) internal { lastSuccesfulDKG[groupIndex] = now; channels[groupIndex].active = false; KeyStorage(contractManager.getContract("KeyStorage")).finalizePublicKey(groupIndex); emit SuccessfulDKG(groupIndex); } function _verifyDataAndSlash( bytes32 groupIndex, uint indexOnSchain, uint secretNumber, G2Operations.G2Point calldata multipliedShare, G2Operations.G2Point[] calldata verificationVector, bytes32 share ) internal { bytes32[2] memory publicKey = Nodes(contractManager.getContract("Nodes")).getNodePublicKey( complaints[groupIndex].fromNodeToComplaint ); uint256 pkX = uint(publicKey[0]); (pkX, ) = ECDH(contractManager.getContract("ECDH")).deriveKey(secretNumber, pkX, uint(publicKey[1])); bytes32 key = bytes32(pkX); // Decrypt secret key contribution uint secret = Decryption(contractManager.getContract("Decryption")).decrypt( share, key ); uint badNode = (_checkCorrectMultipliedShare(multipliedShare, indexOnSchain, secret, verificationVector) ? complaints[groupIndex].fromNodeToComplaint : complaints[groupIndex].nodeToComplaint); _finalizeSlashing(groupIndex, badNode); } function _checkCorrectMultipliedShare( G2Operations.G2Point memory multipliedShare, uint indexOnSchain, uint secret, G2Operations.G2Point[] calldata verificationVector ) private view returns (bool) { if (!multipliedShare.isG2()) { return false; } G2Operations.G2Point memory value = G2Operations.getG2Zero(); G2Operations.G2Point memory tmp = G2Operations.getG2Zero(); for (uint i = 0; i < verificationVector.length; i++) { tmp = verificationVector[i].mulG2(indexOnSchain.add(1) ** i); value = tmp.addG2(value); } tmp = multipliedShare; Fp2Operations.Fp2Point memory g1 = G2Operations.getG1(); Fp2Operations.Fp2Point memory share = Fp2Operations.Fp2Point({ a: 0, b: 0 }); (share.a, share.b) = Precompiled.bn256ScalarMul(g1.a, g1.b, secret); if (!(share.a == 0 && share.b == 0)) { share.b = Fp2Operations.P.sub((share.b % Fp2Operations.P)); } require(G2Operations.isG1(share), "mulShare not in G1"); G2Operations.G2Point memory g2 = G2Operations.getG2(); require(G2Operations.isG2(tmp), "tmp not in g2"); return value.isEqual(multipliedShare) && Precompiled.bn256Pairing( share.a, share.b, g2.x.b, g2.x.a, g2.y.b, g2.y.a, g1.a, g1.b, tmp.x.b, tmp.x.a, tmp.y.b, tmp.y.a); } function _openChannel(bytes32 groupIndex) private { SchainsInternal schainsInternal = SchainsInternal( contractManager.getContract("SchainsInternal") ); uint len = schainsInternal.getNumberOfNodesInGroup(groupIndex); channels[groupIndex].active = true; channels[groupIndex].n = len; delete dkgProcess[groupIndex].completed; delete dkgProcess[groupIndex].broadcasted; dkgProcess[groupIndex].broadcasted = new bool[](len); dkgProcess[groupIndex].completed = new bool[](len); complaints[groupIndex].fromNodeToComplaint = uint(-1); complaints[groupIndex].nodeToComplaint = uint(-1); delete complaints[groupIndex].startComplaintBlockTimestamp; delete dkgProcess[groupIndex].numberOfBroadcasted; delete dkgProcess[groupIndex].numberOfCompleted; channels[groupIndex].startedBlockTimestamp = now; channels[groupIndex].startedBlock = block.number; KeyStorage(contractManager.getContract("KeyStorage")).initPublicKeyInProgress(groupIndex); emit ChannelOpened(groupIndex); } function _handleComplaintWhenBroadcasted(bytes32 groupIndex, uint fromNodeIndex, uint toNodeIndex) private { // incorrect data or missing alright if (complaints[groupIndex].nodeToComplaint == uint(-1)) { if ( isEveryoneBroadcasted(groupIndex) && !isAllDataReceived(groupIndex, toNodeIndex) && startAlrightTimestamp[groupIndex].add(COMPLAINT_TIMELIMIT) <= block.timestamp ) { // missing alright _finalizeSlashing(groupIndex, toNodeIndex); return; } else if (!isAllDataReceived(groupIndex, fromNodeIndex)) { // incorrect data complaints[groupIndex].nodeToComplaint = toNodeIndex; complaints[groupIndex].fromNodeToComplaint = fromNodeIndex; complaints[groupIndex].startComplaintBlockTimestamp = block.timestamp; emit ComplaintSent(groupIndex, fromNodeIndex, toNodeIndex); return; } emit ComplaintError("Has already sent alright"); return; } else if (complaints[groupIndex].nodeToComplaint == toNodeIndex) { // 30 min after incorrect data complaint if (complaints[groupIndex].startComplaintBlockTimestamp.add(COMPLAINT_TIMELIMIT) <= block.timestamp) { _finalizeSlashing(groupIndex, complaints[groupIndex].nodeToComplaint); return; } emit ComplaintError("The same complaint rejected"); return; } emit ComplaintError("One complaint is already sent"); } function _finalizeSlashing(bytes32 groupIndex, uint badNode) private { NodeRotation nodeRotation = NodeRotation(contractManager.getContract("NodeRotation")); SchainsInternal schainsInternal = SchainsInternal( contractManager.getContract("SchainsInternal") ); emit BadGuy(badNode); emit FailedDKG(groupIndex); if (schainsInternal.isAnyFreeNode(groupIndex)) { uint newNode = nodeRotation.rotateNode( badNode, groupIndex, false ); emit NewGuy(newNode); } else { _openChannel(groupIndex); schainsInternal.removeNodeFromSchain( badNode, groupIndex ); channels[groupIndex].active = false; } Punisher(contractManager.getContract("Punisher")).slash( Nodes(contractManager.getContract("Nodes")).getValidatorId(badNode), SlashingTable(contractManager.getContract("SlashingTable")).getPenalty("FailedDKG") ); } function _nodeIndexInSchain(bytes32 schainId, uint nodeIndex) private view returns (uint) { return SchainsInternal(contractManager.getContract("SchainsInternal")) .getNodeIndexInGroup(schainId, nodeIndex); } function _isNodeByMessageSender(uint nodeIndex, address from) private view returns (bool) { Nodes nodes = Nodes(contractManager.getContract("Nodes")); return nodes.isNodeExist(from, nodeIndex); } function _hashData( KeyShare[] memory secretKeyContribution, G2Operations.G2Point[] memory verificationVector ) private pure returns (bytes32) { bytes memory data; for (uint i = 0; i < secretKeyContribution.length; i++) { data = abi.encodePacked(data, secretKeyContribution[i].publicKey, secretKeyContribution[i].share); } for (uint i = 0; i < verificationVector.length; i++) { data = abi.encodePacked( data, verificationVector[i].x.a, verificationVector[i].x.b, verificationVector[i].y.a, verificationVector[i].y.b ); } return keccak256(data); } } contract SkaleManager is IERC777Recipient, Permissions { IERC1820Registry private _erc1820; bytes32 constant private _TOKENS_RECIPIENT_INTERFACE_HASH = 0xb281fc8c12954d22544db45de3159a39272895b169a852b314f9cc762e44c53b; bytes32 constant public ADMIN_ROLE = keccak256("ADMIN_ROLE"); event BountyGot( uint indexed nodeIndex, address owner, uint averageDowntime, uint averageLatency, uint bounty, uint previousBlockEvent, uint time, uint gasSpend ); function tokensReceived( address, // operator address from, address to, uint256 value, bytes calldata userData, bytes calldata // operator data ) external override allow("SkaleToken") { require(to == address(this), "Receiver is incorrect"); if (userData.length > 0) { Schains schains = Schains( contractManager.getContract("Schains")); schains.addSchain(from, value, userData); } } function createNode( uint16 port, uint16 nonce, bytes4 ip, bytes4 publicIp, bytes32[2] calldata publicKey, string calldata name) external { Nodes nodes = Nodes(contractManager.getContract("Nodes")); // validators checks inside checkPossibilityCreatingNode nodes.checkPossibilityCreatingNode(msg.sender); Nodes.NodeCreationParams memory params = Nodes.NodeCreationParams({ name: name, ip: ip, publicIp: publicIp, port: port, publicKey: publicKey, nonce: nonce}); nodes.createNode(msg.sender, params); // uint nodeIndex = nodes.createNode(msg.sender, params); // Monitors monitors = Monitors(contractManager.getContract("Monitors")); // monitors.addMonitor(nodeIndex); } function nodeExit(uint nodeIndex) external { NodeRotation nodeRotation = NodeRotation(contractManager.getContract("NodeRotation")); ValidatorService validatorService = ValidatorService(contractManager.getContract("ValidatorService")); Nodes nodes = Nodes(contractManager.getContract("Nodes")); uint validatorId = nodes.getValidatorId(nodeIndex); bool permitted = (_isOwner() || nodes.isNodeExist(msg.sender, nodeIndex)); if (!permitted) { permitted = validatorService.getValidatorId(msg.sender) == validatorId; } require(permitted, "Sender is not permitted to call this function"); SchainsInternal schainsInternal = SchainsInternal(contractManager.getContract("SchainsInternal")); ConstantsHolder constants = ConstantsHolder(contractManager.getContract("ConstantsHolder")); nodeRotation.freezeSchains(nodeIndex); if (nodes.isNodeActive(nodeIndex)) { require(nodes.initExit(nodeIndex), "Initialization of node exit is failed"); } bool completed; bool isSchains = false; if (schainsInternal.getActiveSchain(nodeIndex) != bytes32(0)) { completed = nodeRotation.exitFromSchain(nodeIndex); isSchains = true; } else { completed = true; } if (completed) { require(nodes.completeExit(nodeIndex), "Finishing of node exit is failed"); nodes.changeNodeFinishTime(nodeIndex, now.add(isSchains ? constants.rotationDelay() : 0)); // Monitors monitors = Monitors(contractManager.getContract("Monitors")); // monitors.removeCheckedNodes(nodeIndex); // monitors.deleteMonitor(nodeIndex); nodes.deleteNodeForValidator(validatorId, nodeIndex); } } function deleteSchain(string calldata name) external { Schains schains = Schains(contractManager.getContract("Schains")); // schain owner checks inside deleteSchain schains.deleteSchain(msg.sender, name); } function deleteSchainByRoot(string calldata name) external onlyAdmin { Schains schains = Schains(contractManager.getContract("Schains")); schains.deleteSchainByRoot(name); } // function sendVerdict(uint fromMonitorIndex, Monitors.Verdict calldata verdict) external { // Nodes nodes = Nodes(contractManager.getContract("Nodes")); // require(nodes.isNodeExist(msg.sender, fromMonitorIndex), "Node does not exist for Message sender"); // Monitors monitors = Monitors(contractManager.getContract("Monitors")); // // additional checks for monitoring inside sendVerdict // monitors.sendVerdict(fromMonitorIndex, verdict); // } // function sendVerdicts(uint fromMonitorIndex, Monitors.Verdict[] calldata verdicts) external { // Nodes nodes = Nodes(contractManager.getContract("Nodes")); // require(nodes.isNodeExist(msg.sender, fromMonitorIndex), "Node does not exist for Message sender"); // Monitors monitors = Monitors(contractManager.getContract("Monitors")); // for (uint i = 0; i < verdicts.length; i++) { // // additional checks for monitoring inside sendVerdict // monitors.sendVerdict(fromMonitorIndex, verdicts[i]); // } // } function getBounty(uint nodeIndex) external { Nodes nodes = Nodes(contractManager.getContract("Nodes")); require(nodes.isNodeExist(msg.sender, nodeIndex), "Node does not exist for Message sender"); require(nodes.isTimeForReward(nodeIndex), "Not time for bounty"); require( nodes.isNodeActive(nodeIndex) || nodes.isNodeLeaving(nodeIndex), "Node is not Active and is not Leaving" ); Bounty bountyContract = Bounty(contractManager.getContract("Bounty")); uint averageDowntime; uint averageLatency; Monitors monitors = Monitors(contractManager.getContract("Monitors")); (averageDowntime, averageLatency) = monitors.calculateMetrics(nodeIndex); uint bounty = bountyContract.getBounty( nodeIndex, averageDowntime, averageLatency); nodes.changeNodeLastRewardDate(nodeIndex); // monitors.deleteMonitor(nodeIndex); // monitors.addMonitor(nodeIndex); if (bounty > 0) { _payBounty(bounty, nodes.getValidatorId(nodeIndex)); } _emitBountyEvent(nodeIndex, msg.sender, averageDowntime, averageLatency, bounty); } function initialize(address newContractsAddress) public override initializer { Permissions.initialize(newContractsAddress); _erc1820 = IERC1820Registry(0x1820a4B7618BdE71Dce8cdc73aAB6C95905faD24); _erc1820.setInterfaceImplementer(address(this), _TOKENS_RECIPIENT_INTERFACE_HASH, address(this)); } function _payBounty(uint bounty, uint validatorId) private returns (bool) { IERC777 skaleToken = IERC777(contractManager.getContract("SkaleToken")); Distributor distributor = Distributor(contractManager.getContract("Distributor")); require( IMintableToken(address(skaleToken)).mint(address(distributor), bounty, abi.encode(validatorId), ""), "Token was not minted" ); } function _emitBountyEvent( uint nodeIndex, address from, uint averageDowntime, uint averageLatency, uint bounty ) private { Monitors monitors = Monitors(contractManager.getContract("Monitors")); uint previousBlockEvent = monitors.getLastBountyBlock(nodeIndex); monitors.setLastBountyBlock(nodeIndex); emit BountyGot( nodeIndex, from, averageDowntime, averageLatency, bounty, previousBlockEvent, block.timestamp, gasleft()); } } contract SkaleToken is ERC777, Permissions, ReentrancyGuard, IDelegatableToken, IMintableToken { using SafeMath for uint; string public constant NAME = "SKALE"; string public constant SYMBOL = "SKL"; uint public constant DECIMALS = 18; uint public constant CAP = 7 * 1e9 * (10 ** DECIMALS); // the maximum amount of tokens that can ever be created constructor(address contractsAddress, address[] memory defOps) public ERC777("SKALE", "SKL", defOps) { Permissions.initialize(contractsAddress); } /** * @dev mint - create some amount of token and transfer it to the specified address * @param account - address where some amount of token would be created * @param amount - amount of tokens to mine * @param userData bytes extra information provided by the token holder (if any) * @param operatorData bytes extra information provided by the operator (if any) * @return returns success of function call. */ function mint( address account, uint256 amount, bytes calldata userData, bytes calldata operatorData ) external override allow("SkaleManager") //onlyAuthorized returns (bool) { require(amount <= CAP.sub(totalSupply()), "Amount is too big"); _mint( account, amount, userData, operatorData ); return true; } function getAndUpdateDelegatedAmount(address wallet) external override returns (uint) { return DelegationController(contractManager.getContract("DelegationController")) .getAndUpdateDelegatedAmount(wallet); } function getAndUpdateSlashedAmount(address wallet) external override returns (uint) { return Punisher(contractManager.getContract("Punisher")).getAndUpdateLockedAmount(wallet); } function getAndUpdateLockedAmount(address wallet) public override returns (uint) { return TokenState(contractManager.getContract("TokenState")).getAndUpdateLockedAmount(wallet); } // internal function _beforeTokenTransfer( address, // operator address from, address, // to uint256 tokenId) internal override { uint locked = getAndUpdateLockedAmount(from); if (locked > 0) { require(balanceOf(from) >= locked.add(tokenId), "Token should be unlocked for transferring"); } } function _callTokensToSend( address operator, address from, address to, uint256 amount, bytes memory userData, bytes memory operatorData ) internal override nonReentrant { super._callTokensToSend(operator, from, to, amount, userData, operatorData); } function _callTokensReceived( address operator, address from, address to, uint256 amount, bytes memory userData, bytes memory operatorData, bool requireReceptionAck ) internal override nonReentrant { super._callTokensReceived(operator, from, to, amount, userData, operatorData, requireReceptionAck); } // we have to override _msgData() and _msgSender() functions because of collision in Context and ContextUpgradeSafe function _msgData() internal view override(Context, ContextUpgradeSafe) returns (bytes memory) { return Context._msgData(); } function _msgSender() internal view override(Context, ContextUpgradeSafe) returns (address payable) { return Context._msgSender(); } } contract SkaleVerifier is Permissions { using Fp2Operations for Fp2Operations.Fp2Point; function verify( Fp2Operations.Fp2Point calldata signature, bytes32 hash, uint counter, uint hashA, uint hashB, G2Operations.G2Point calldata publicKey ) external view returns (bool) { if (!_checkHashToGroupWithHelper( hash, counter, hashA, hashB ) ) { return false; } uint newSignB; if (!(signature.a == 0 && signature.b == 0)) { newSignB = Fp2Operations.P.sub((signature.b % Fp2Operations.P)); } else { newSignB = signature.b; } require(G2Operations.isG1Point(signature.a, newSignB), "Sign not in G1"); require(G2Operations.isG1Point(hashA, hashB), "Hash not in G1"); G2Operations.G2Point memory g2 = G2Operations.getG2(); require( G2Operations.isG2(publicKey), "Public Key not in G2" ); return Precompiled.bn256Pairing( signature.a, newSignB, g2.x.b, g2.x.a, g2.y.b, g2.y.a, hashA, hashB, publicKey.x.b, publicKey.x.a, publicKey.y.b, publicKey.y.a ); } function initialize(address newContractsAddress) public override initializer { Permissions.initialize(newContractsAddress); } function _checkHashToGroupWithHelper( bytes32 hash, uint counter, uint hashA, uint hashB ) private pure returns (bool) { uint xCoord = uint(hash) % Fp2Operations.P; xCoord = (xCoord.add(counter)) % Fp2Operations.P; uint ySquared = addmod( mulmod(mulmod(xCoord, xCoord, Fp2Operations.P), xCoord, Fp2Operations.P), 3, Fp2Operations.P ); if (hashB < Fp2Operations.P.div(2) || mulmod(hashB, hashB, Fp2Operations.P) != ySquared || xCoord != hashA) { return false; } return true; } } contract SlashingTable is Permissions { mapping (uint => uint) private _penalties; /** * @dev Sets a penalty for a given offense * Only the owner can set penalties. * * @param offense string * @param penalty uint amount of slashing for the specified penalty */ function setPenalty(string calldata offense, uint penalty) external onlyOwner { _penalties[uint(keccak256(abi.encodePacked(offense)))] = penalty; } /** * @dev Returns the penalty for a given offense * * @param offense string * @return uint amount of slashing for the specified penalty */ function getPenalty(string calldata offense) external view returns (uint) { uint penalty = _penalties[uint(keccak256(abi.encodePacked(offense)))]; return penalty; } function initialize(address contractManagerAddress) public override initializer { Permissions.initialize(contractManagerAddress); } } contract TokenLaunchLocker is Permissions, ILocker { using MathUtils for uint; using PartialDifferences for PartialDifferences.Value; /** * @dev Emitted when an `amount` is unlocked. */ event Unlocked( address holder, uint amount ); /** * @dev Emitted when an `amount` is locked. */ event Locked( address holder, uint amount ); struct DelegatedAmountAndMonth { uint delegated; uint month; } // holder => tokens mapping (address => uint) private _locked; // holder => tokens mapping (address => PartialDifferences.Value) private _delegatedAmount; mapping (address => DelegatedAmountAndMonth) private _totalDelegatedAmount; // delegationId => tokens mapping (uint => uint) private _delegationAmount; function lock(address holder, uint amount) external allow("TokenLaunchManager") { _locked[holder] = _locked[holder].add(amount); emit Locked(holder, amount); } function handleDelegationAdd( address holder, uint delegationId, uint amount, uint month) external allow("DelegationController") { if (_locked[holder] > 0) { TimeHelpers timeHelpers = TimeHelpers(contractManager.getContract("TimeHelpers")); uint currentMonth = timeHelpers.getCurrentMonth(); uint fromLocked = amount; uint locked = _locked[holder].boundedSub(_getAndUpdateDelegatedAmount(holder, currentMonth)); if (fromLocked > locked) { fromLocked = locked; } if (fromLocked > 0) { require(_delegationAmount[delegationId] == 0, "Delegation was already added"); _addToDelegatedAmount(holder, fromLocked, month); _addToTotalDelegatedAmount(holder, fromLocked, month); _delegationAmount[delegationId] = fromLocked; } } } function handleDelegationRemoving( address holder, uint delegationId, uint month) external allow("DelegationController") { if (_delegationAmount[delegationId] > 0) { if (_locked[holder] > 0) { _removeFromDelegatedAmount(holder, _delegationAmount[delegationId], month); } delete _delegationAmount[delegationId]; } } function getAndUpdateLockedAmount(address wallet) external override returns (uint) { if (_locked[wallet] > 0) { DelegationController delegationController = DelegationController( contractManager.getContract("DelegationController")); TimeHelpers timeHelpers = TimeHelpers(contractManager.getContract("TimeHelpers")); ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); uint currentMonth = timeHelpers.getCurrentMonth(); if (_totalDelegatedSatisfiesProofOfUserCondition(wallet) && timeHelpers.calculateProofOfUseLockEndTime( _totalDelegatedAmount[wallet].month, constantsHolder.proofOfUseLockUpPeriodDays() ) <= now) { _unlock(wallet); return 0; } else { uint lockedByDelegationController = _getAndUpdateDelegatedAmount(wallet, currentMonth) .add(delegationController.getLockedInPendingDelegations(wallet)); if (_locked[wallet] > lockedByDelegationController) { return _locked[wallet].boundedSub(lockedByDelegationController); } else { return 0; } } } else { return 0; } } function getAndUpdateForbiddenForDelegationAmount(address) external override returns (uint) { return 0; } function initialize(address contractManagerAddress) public override initializer { Permissions.initialize(contractManagerAddress); } // private function _getAndUpdateDelegatedAmount(address holder, uint currentMonth) private returns (uint) { return _delegatedAmount[holder].getAndUpdateValue(currentMonth); } function _addToDelegatedAmount(address holder, uint amount, uint month) private { _delegatedAmount[holder].addToValue(amount, month); } function _removeFromDelegatedAmount(address holder, uint amount, uint month) private { _delegatedAmount[holder].subtractFromValue(amount, month); } function _addToTotalDelegatedAmount(address holder, uint amount, uint month) private { require( _totalDelegatedAmount[holder].month == 0 || _totalDelegatedAmount[holder].month <= month, "Can't add to total delegated in the past"); // do not update counter if it is big enough // because it will override month value if (!_totalDelegatedSatisfiesProofOfUserCondition(holder)) { _totalDelegatedAmount[holder].delegated = _totalDelegatedAmount[holder].delegated.add(amount); _totalDelegatedAmount[holder].month = month; } } function _unlock(address holder) private { emit Unlocked(holder, _locked[holder]); delete _locked[holder]; _deleteDelegatedAmount(holder); _deleteTotalDelegatedAmount(holder); } function _deleteDelegatedAmount(address holder) private { _delegatedAmount[holder].clear(); } function _deleteTotalDelegatedAmount(address holder) private { delete _totalDelegatedAmount[holder].delegated; delete _totalDelegatedAmount[holder].month; } function _totalDelegatedSatisfiesProofOfUserCondition(address holder) private view returns (bool) { ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); return _totalDelegatedAmount[holder].delegated.mul(100) >= _locked[holder].mul(constantsHolder.proofOfUseDelegationPercentage()); } } contract TokenLaunchManager is Permissions, IERC777Recipient { event Approved( address holder, uint amount ); /** * @dev Emitted when a `holder` retrieves `amount`. */ event TokensRetrieved( address holder, uint amount ); /** * @dev Emitted when token launch is completed. */ event TokenLaunchIsCompleted( uint timestamp ); bytes32 public constant SELLER_ROLE = keccak256("SELLER_ROLE"); IERC1820Registry private _erc1820; mapping (address => uint) public approved; bool public tokenLaunchIsCompleted; uint private _totalApproved; modifier onlySeller() { require(_isOwner() || hasRole(SELLER_ROLE, _msgSender()), "Not authorized"); _; } /** * @dev Allocates values for `walletAddress` * * Requirements: * * - token launch must not be completed * - the total approved must be less than or equal to the seller balance. * * Emits an Approved event. * * @param walletAddress address wallet address to approve transfers to * @param value uint token amount to approve transfer to */ function approveTransfer(address walletAddress, uint value) external onlySeller { require(!tokenLaunchIsCompleted, "Can't approve because token launch is completed"); _approveTransfer(walletAddress, value); require(_totalApproved <= _getBalance(), "Balance is too low"); } /** * @dev Allocates values for `walletAddresses` * * Requirements: * * - token launch must not be completed * - the input arrays must be equal in size. * - the total approved must be less than or equal to the seller balance. * * Emits an Approved event. * * @param walletAddress address[] array of wallet addresses to approve transfers to * @param value uint[] array of token amounts to approve transfer to */ function approveBatchOfTransfers(address[] calldata walletAddress, uint[] calldata value) external onlySeller { require(!tokenLaunchIsCompleted, "Can't approve because token launch is completed"); require(walletAddress.length == value.length, "Wrong input arrays length"); for (uint i = 0; i < walletAddress.length; ++i) { _approveTransfer(walletAddress[i], value[i]); } require(_totalApproved <= _getBalance(), "Balance is too low"); } /** * @dev Allow withdrawals and disallow approvals changes * * Requirements: * * - all approvals must be done * - token launch must be not completed * */ function completeTokenLaunch() external onlySeller { require(!tokenLaunchIsCompleted, "Can't complete launch because it's already completed"); tokenLaunchIsCompleted = true; emit TokenLaunchIsCompleted(now); } /** * @dev Allows the seller to update a purchaser's address in case of an error. * * Requirements: * * - the updated address must not already be in use. * * Emits an Approved event. * * @param oldAddress address token purchaser's previous address * @param newAddress address token purchaser's new address */ function changeApprovalAddress(address oldAddress, address newAddress) external onlySeller { require(!tokenLaunchIsCompleted, "Can't change approval because token launch is completed"); require(approved[newAddress] == 0, "New address is already used"); uint oldValue = approved[oldAddress]; if (oldValue > 0) { _setApprovedAmount(oldAddress, 0); _approveTransfer(newAddress, oldValue); } } /** * @dev Allows the seller to update a purchaser's amount in case of an error. * * @param wallet address of the token purchaser * @param newValue uint of the updated token amount */ function changeApprovalValue(address wallet, uint newValue) external onlySeller { require(!tokenLaunchIsCompleted, "Can't change approval because token launch is completed"); _setApprovedAmount(wallet, newValue); } /** * @dev Transfers the entire value to the sender's address. Transferred tokens * are locked for Proof-of-Use. * * Requirements: * * - token transfer must be approved. */ function retrieve() external { require(tokenLaunchIsCompleted, "Can't retrive tokens because token launch is not completed"); require(approved[_msgSender()] > 0, "Transfer is not approved"); uint value = approved[_msgSender()]; _setApprovedAmount(_msgSender(), 0); require( IERC20(contractManager.getContract("SkaleToken")).transfer(_msgSender(), value), "Error in transfer call to SkaleToken"); TokenLaunchLocker(contractManager.getContract("TokenLaunchLocker")).lock(_msgSender(), value); emit TokensRetrieved(_msgSender(), value); } /** * @dev A required callback for ERC777. */ function tokensReceived( address operator, address from, address to, uint256 amount, bytes calldata userData, bytes calldata operatorData ) external override allow("SkaleToken") // solhint-disable-next-line no-empty-blocks { } function initialize(address contractManagerAddress) public override initializer { Permissions.initialize(contractManagerAddress); tokenLaunchIsCompleted = false; _erc1820 = IERC1820Registry(0x1820a4B7618BdE71Dce8cdc73aAB6C95905faD24); _erc1820.setInterfaceImplementer(address(this), keccak256("ERC777TokensRecipient"), address(this)); } // private function _approveTransfer(address walletAddress, uint value) internal onlySeller { require(value > 0, "Value must be greater than zero"); _setApprovedAmount(walletAddress, approved[walletAddress].add(value)); emit Approved(walletAddress, value); } function _getBalance() private view returns(uint balance) { return IERC20(contractManager.getContract("SkaleToken")).balanceOf(address(this)); } function _setApprovedAmount(address wallet, uint value) private { require(wallet != address(0), "Wallet address must be non zero"); uint oldValue = approved[wallet]; if (oldValue != value) { approved[wallet] = value; if (value > oldValue) { _totalApproved = _totalApproved.add(value.sub(oldValue)); } else { _totalApproved = _totalApproved.sub(oldValue.sub(value)); } } } } contract TokenState is Permissions, ILocker { /** * @dev Emitted when a contract is added to the locker. */ event LockerWasAdded( string locker ); /** * @dev Emitted when a contract is removed from the locker. */ event LockerWasRemoved( string locker ); string[] private _lockers; /** * @dev Return and update the total locked amount of a given `holder`. * * @param holder address of the token holder * @return total locked amount */ function getAndUpdateLockedAmount(address holder) external override returns (uint) { uint locked = 0; for (uint i = 0; i < _lockers.length; ++i) { ILocker locker = ILocker(contractManager.getContract(_lockers[i])); locked = locked.add(locker.getAndUpdateLockedAmount(holder)); } return locked; } /** * @dev Return and update the total locked and un-delegatable amount of a given `holder`. * * @param holder address of the token holder * @return amount total slashed amount (non-transferable and non-delegatable) */ function getAndUpdateForbiddenForDelegationAmount(address holder) external override returns (uint amount) { uint forbidden = 0; for (uint i = 0; i < _lockers.length; ++i) { ILocker locker = ILocker(contractManager.getContract(_lockers[i])); forbidden = forbidden.add(locker.getAndUpdateForbiddenForDelegationAmount(holder)); } return forbidden; } /** * @dev Allows the Owner to remove a contract from the locker. * * Emits a LockerWasRemoved event. * * @param locker string name of contract to remove from locker */ function removeLocker(string calldata locker) external onlyOwner { uint index; bytes32 hash = keccak256(abi.encodePacked(locker)); for (index = 0; index < _lockers.length; ++index) { if (keccak256(abi.encodePacked(_lockers[index])) == hash) { break; } } if (index < _lockers.length) { if (index < _lockers.length.sub(1)) { _lockers[index] = _lockers[_lockers.length.sub(1)]; } delete _lockers[_lockers.length.sub(1)]; _lockers.pop(); emit LockerWasRemoved(locker); } } function initialize(address contractManagerAddress) public override initializer { Permissions.initialize(contractManagerAddress); addLocker("DelegationController"); addLocker("Punisher"); addLocker("TokenLaunchLocker"); } /** * @dev Allows the Owner to add a contract to the Locker. * * Emits a LockerWasAdded event. * * @param locker string name of contract to add to locker */ function addLocker(string memory locker) public onlyOwner { _lockers.push(locker); emit LockerWasAdded(locker); } } contract ValidatorService is Permissions { using ECDSA for bytes32; struct Validator { string name; address validatorAddress; address requestedAddress; string description; uint feeRate; uint registrationTime; uint minimumDelegationAmount; bool acceptNewRequests; } /** * @dev Emitted when a validator registers. */ event ValidatorRegistered( uint validatorId ); /** * @dev Emitted when a validator address changes. */ event ValidatorAddressChanged( uint validatorId, address newAddress ); event ValidatorWasEnabled( uint validatorId ); event ValidatorWasDisabled( uint validatorId ); /** * @dev Emitted when a node address is linked to a validator. */ event NodeAddressWasAdded( uint validatorId, address nodeAddress ); /** * @dev Emitted when a node address is unlinked from a validator. */ event NodeAddressWasRemoved( uint validatorId, address nodeAddress ); mapping (uint => Validator) public validators; mapping (uint => bool) private _trustedValidators; uint[] public trustedValidatorsList; // address => validatorId mapping (address => uint) private _validatorAddressToId; // address => validatorId mapping (address => uint) private _nodeAddressToValidatorId; // validatorId => nodeAddress[] mapping (uint => address[]) private _nodeAddresses; uint public numberOfValidators; bool public useWhitelist; modifier checkValidatorExists(uint validatorId) { require(validatorExists(validatorId), "Validator with such ID does not exist"); _; } /** * @dev Creates a new validator Id. * * Requirements: * * - sender must not already have registered a validator Id. * - fee rate must be between 0 - 1000‰. Note: per mille! * * Emits ValidatorRegistered event. * * @param name string * @param description string * @param feeRate uint Fee charged on delegations by the validator per mille * @param minimumDelegationAmount uint Minimum delegation amount accepted by the validator */ function registerValidator( string calldata name, string calldata description, uint feeRate, uint minimumDelegationAmount ) external returns (uint validatorId) { require(!validatorAddressExists(msg.sender), "Validator with such address already exists"); require(feeRate < 1000, "Fee rate of validator should be lower than 100%"); validatorId = ++numberOfValidators; validators[validatorId] = Validator( name, msg.sender, address(0), description, feeRate, now, minimumDelegationAmount, true ); _setValidatorAddress(validatorId, msg.sender); emit ValidatorRegistered(validatorId); } function enableValidator(uint validatorId) external checkValidatorExists(validatorId) onlyAdmin { require(!_trustedValidators[validatorId], "Validator is already enabled"); _trustedValidators[validatorId] = true; trustedValidatorsList.push(validatorId); emit ValidatorWasEnabled(validatorId); } function disableValidator(uint validatorId) external checkValidatorExists(validatorId) onlyAdmin { require(_trustedValidators[validatorId], "Validator is already disabled"); _trustedValidators[validatorId] = false; uint position = _find(trustedValidatorsList, validatorId); if (position < trustedValidatorsList.length) { trustedValidatorsList[position] = trustedValidatorsList[trustedValidatorsList.length.sub(1)]; } trustedValidatorsList.pop(); emit ValidatorWasDisabled(validatorId); } /** * @dev Owner can disable the validator whitelist. Once turned off the * whitelist cannot be re-enabled. */ function disableWhitelist() external onlyOwner { useWhitelist = false; } /** * @dev Allows a validator to request a new address. * * Requirements: * * - new address must not be null * - new address must not be already registered as a validator * * @param newValidatorAddress address */ function requestForNewAddress(address newValidatorAddress) external { require(newValidatorAddress != address(0), "New address cannot be null"); require(_validatorAddressToId[newValidatorAddress] == 0, "Address already registered"); // check Validator Exist inside getValidatorId uint validatorId = getValidatorId(msg.sender); validators[validatorId].requestedAddress = newValidatorAddress; } function confirmNewAddress(uint validatorId) external checkValidatorExists(validatorId) { require( getValidator(validatorId).requestedAddress == msg.sender, "The validator address cannot be changed because it is not the actual owner" ); delete validators[validatorId].requestedAddress; _setValidatorAddress(validatorId, msg.sender); emit ValidatorAddressChanged(validatorId, validators[validatorId].validatorAddress); } /** * @dev Links a given node address. * * Requirements: * * - the given signature must be valid. * - the address must not be assigned to a validator. * * Emits NodeAddressWasAdded event. * * @param nodeAddress address * @param sig bytes signature of validator Id by node operator. */ function linkNodeAddress(address nodeAddress, bytes calldata sig) external { // check Validator Exist inside getValidatorId uint validatorId = getValidatorId(msg.sender); require( keccak256(abi.encodePacked(validatorId)).toEthSignedMessageHash().recover(sig) == nodeAddress, "Signature is not pass" ); require(_validatorAddressToId[nodeAddress] == 0, "Node address is a validator"); _addNodeAddress(validatorId, nodeAddress); emit NodeAddressWasAdded(validatorId, nodeAddress); } /** * @dev Unlinks a given node address from a validator. * * Emits NodeAddressWasRemoved event. * * @param nodeAddress address */ function unlinkNodeAddress(address nodeAddress) external { // check Validator Exist inside getValidatorId uint validatorId = getValidatorId(msg.sender); _removeNodeAddress(validatorId, nodeAddress); emit NodeAddressWasRemoved(validatorId, nodeAddress); } function setValidatorMDA(uint minimumDelegationAmount) external { // check Validator Exist inside getValidatorId uint validatorId = getValidatorId(msg.sender); validators[validatorId].minimumDelegationAmount = minimumDelegationAmount; } /** * @dev Allows a validator to set a new validator name. * * @param newName string */ function setValidatorName(string calldata newName) external { // check Validator Exist inside getValidatorId uint validatorId = getValidatorId(msg.sender); validators[validatorId].name = newName; } /** * @dev Allows a validator to set a new validator description. * * @param newDescription string */ function setValidatorDescription(string calldata newDescription) external { // check Validator Exist inside getValidatorId uint validatorId = getValidatorId(msg.sender); validators[validatorId].description = newDescription; } /** * @dev Allows a validator to start accepting new delegation requests. * * Requirements: * * - validator must not have already enabled accepting new requests */ function startAcceptingNewRequests() external { // check Validator Exist inside getValidatorId uint validatorId = getValidatorId(msg.sender); require(!isAcceptingNewRequests(validatorId), "Accepting request is already enabled"); validators[validatorId].acceptNewRequests = true; } /** * @dev Allows a validator to stop accepting new delegation requests. * * Requirements: * * - validator must not have already stopped accepting new requests */ function stopAcceptingNewRequests() external { // check Validator Exist inside getValidatorId uint validatorId = getValidatorId(msg.sender); require(isAcceptingNewRequests(validatorId), "Accepting request is already disabled"); validators[validatorId].acceptNewRequests = false; } /** * @dev Returns the amount of validator bond. * * @param validatorId uint ID of validator to return the amount of locked funds * @return bondAmount uint the amount of self-delegated funds by the validator */ function getAndUpdateBondAmount(uint validatorId) external returns (uint) { DelegationController delegationController = DelegationController( contractManager.getContract("DelegationController") ); return delegationController.getAndUpdateDelegatedByHolderToValidatorNow( getValidator(validatorId).validatorAddress, validatorId ); } function getMyNodesAddresses() external view returns (address[] memory) { return getNodeAddresses(getValidatorId(msg.sender)); } /** * @dev Returns a list of trusted validators. * * @return uint[] trusted validators */ function getTrustedValidators() external view returns (uint[] memory) { return trustedValidatorsList; } function checkMinimumDelegation(uint validatorId, uint amount) external view checkValidatorExists(validatorId) allow("DelegationController") returns (bool) { return validators[validatorId].minimumDelegationAmount <= amount ? true : false; } function checkValidatorAddressToId(address validatorAddress, uint validatorId) external view returns (bool) { return getValidatorId(validatorAddress) == validatorId ? true : false; } function getValidatorIdByNodeAddress(address nodeAddress) external view returns (uint validatorId) { validatorId = _nodeAddressToValidatorId[nodeAddress]; require(validatorId != 0, "Node address is not assigned to a validator"); } function isAuthorizedValidator(uint validatorId) external view checkValidatorExists(validatorId) returns (bool) { return _trustedValidators[validatorId] || !useWhitelist; } function initialize(address contractManagerAddress) public override initializer { Permissions.initialize(contractManagerAddress); useWhitelist = true; } function getNodeAddresses(uint validatorId) public view returns (address[] memory) { return _nodeAddresses[validatorId]; } function validatorExists(uint validatorId) public view returns (bool) { return validatorId <= numberOfValidators && validatorId != 0; } function validatorAddressExists(address validatorAddress) public view returns (bool) { return _validatorAddressToId[validatorAddress] != 0; } function checkIfValidatorAddressExists(address validatorAddress) public view { require(validatorAddressExists(validatorAddress), "Validator with given address does not exist"); } function getValidator(uint validatorId) public view checkValidatorExists(validatorId) returns (Validator memory) { return validators[validatorId]; } function getValidatorId(address validatorAddress) public view returns (uint) { checkIfValidatorAddressExists(validatorAddress); return _validatorAddressToId[validatorAddress]; } function isAcceptingNewRequests(uint validatorId) public view checkValidatorExists(validatorId) returns (bool) { return validators[validatorId].acceptNewRequests; } // private function _setValidatorAddress(uint validatorId, address validatorAddress) private { if (_validatorAddressToId[validatorAddress] == validatorId) { return; } require(_validatorAddressToId[validatorAddress] == 0, "Address is in use by another validator"); address oldAddress = validators[validatorId].validatorAddress; delete _validatorAddressToId[oldAddress]; _nodeAddressToValidatorId[validatorAddress] = validatorId; validators[validatorId].validatorAddress = validatorAddress; _validatorAddressToId[validatorAddress] = validatorId; } function _addNodeAddress(uint validatorId, address nodeAddress) private { if (_nodeAddressToValidatorId[nodeAddress] == validatorId) { return; } require(_nodeAddressToValidatorId[nodeAddress] == 0, "Validator cannot override node address"); _nodeAddressToValidatorId[nodeAddress] = validatorId; _nodeAddresses[validatorId].push(nodeAddress); } function _removeNodeAddress(uint validatorId, address nodeAddress) private { require(_nodeAddressToValidatorId[nodeAddress] == validatorId, "Validator does not have permissions to unlink node"); delete _nodeAddressToValidatorId[nodeAddress]; for (uint i = 0; i < _nodeAddresses[validatorId].length; ++i) { if (_nodeAddresses[validatorId][i] == nodeAddress) { if (i + 1 < _nodeAddresses[validatorId].length) { _nodeAddresses[validatorId][i] = _nodeAddresses[validatorId][_nodeAddresses[validatorId].length.sub(1)]; } delete _nodeAddresses[validatorId][_nodeAddresses[validatorId].length.sub(1)]; _nodeAddresses[validatorId].pop(); break; } } } function _find(uint[] memory array, uint index) private pure returns (uint) { uint i; for (i = 0; i < array.length; i++) { if (array[i] == index) { return i; } } return array.length; } } contract Bounty is Permissions { uint public constant STAGE_LENGTH = 31558150; // 1 year uint public constant YEAR1_BOUNTY = 3850e5 * 1e18; uint public constant YEAR2_BOUNTY = 3465e5 * 1e18; uint public constant YEAR3_BOUNTY = 3080e5 * 1e18; uint public constant YEAR4_BOUNTY = 2695e5 * 1e18; uint public constant YEAR5_BOUNTY = 2310e5 * 1e18; uint public constant YEAR6_BOUNTY = 1925e5 * 1e18; uint public constant BOUNTY = 96250000 * 1e18; uint private _nextStage; uint private _stagePool; bool public bountyReduction; uint private _nodesPerRewardPeriod; uint private _nodesRemainingPerRewardPeriod; uint private _rewardPeriodFinished; function getBounty( uint nodeIndex, uint downtime, uint latency ) external allow("SkaleManager") returns (uint) { ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); Nodes nodes = Nodes(contractManager.getContract("Nodes")); _refillStagePool(constantsHolder); if (_rewardPeriodFinished <= now) { _updateNodesPerRewardPeriod(constantsHolder, nodes); } uint bounty = _calculateMaximumBountyAmount(_stagePool, _nextStage, nodeIndex, constantsHolder, nodes); bounty = _reduceBounty( bounty, nodeIndex, downtime, latency, nodes, constantsHolder ); _stagePool = _stagePool.sub(bounty); _nodesRemainingPerRewardPeriod = _nodesRemainingPerRewardPeriod.sub(1); return bounty; } function enableBountyReduction() external onlyOwner { bountyReduction = true; } function disableBountyReduction() external onlyOwner { bountyReduction = false; } function calculateNormalBounty(uint nodeIndex) external view returns (uint) { ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); Nodes nodes = Nodes(contractManager.getContract("Nodes")); uint stagePoolSize; uint nextStage; (stagePoolSize, nextStage) = _getStagePoolSize(constantsHolder); return _calculateMaximumBountyAmount( stagePoolSize, nextStage, nodeIndex, constantsHolder, nodes ); } function initialize(address contractManagerAddress) public override initializer { Permissions.initialize(contractManagerAddress); _nextStage = 0; _stagePool = 0; _rewardPeriodFinished = 0; bountyReduction = false; } // private function _calculateMaximumBountyAmount( uint stagePoolSize, uint nextStage, uint nodeIndex, ConstantsHolder constantsHolder, Nodes nodes ) private view returns (uint) { if (nodes.isNodeLeft(nodeIndex)) { return 0; } if (now < constantsHolder.launchTimestamp()) { // network is not launched // bounty is turned off return 0; } uint numberOfRewards = _getStageBeginningTimestamp(nextStage, constantsHolder) .sub(now) .div(constantsHolder.rewardPeriod()); uint numberOfRewardsPerAllNodes = numberOfRewards.mul(_nodesPerRewardPeriod); return stagePoolSize.div( numberOfRewardsPerAllNodes.add(_nodesRemainingPerRewardPeriod) ); } function _getStageBeginningTimestamp(uint stage, ConstantsHolder constantsHolder) private view returns (uint) { return constantsHolder.launchTimestamp().add(stage.mul(STAGE_LENGTH)); } function _getStagePoolSize(ConstantsHolder constantsHolder) private view returns (uint stagePool, uint nextStage) { stagePool = _stagePool; for (nextStage = _nextStage; now >= _getStageBeginningTimestamp(nextStage, constantsHolder); ++nextStage) { stagePool += _getStageReward(_nextStage); } } function _refillStagePool(ConstantsHolder constantsHolder) private { (_stagePool, _nextStage) = _getStagePoolSize(constantsHolder); } function _updateNodesPerRewardPeriod(ConstantsHolder constantsHolder, Nodes nodes) private { _nodesPerRewardPeriod = nodes.getNumberOnlineNodes(); _nodesRemainingPerRewardPeriod = _nodesPerRewardPeriod; _rewardPeriodFinished = now.add(uint(constantsHolder.rewardPeriod())); } function _getStageReward(uint stage) private pure returns (uint) { if (stage >= 6) { return BOUNTY.div(2 ** stage.sub(6).div(3)); } else { if (stage == 0) { return YEAR1_BOUNTY; } else if (stage == 1) { return YEAR2_BOUNTY; } else if (stage == 2) { return YEAR3_BOUNTY; } else if (stage == 3) { return YEAR4_BOUNTY; } else if (stage == 4) { return YEAR5_BOUNTY; } else { return YEAR6_BOUNTY; } } } function _reduceBounty( uint bounty, uint nodeIndex, uint downtime, uint latency, Nodes nodes, ConstantsHolder constants ) private returns (uint reducedBounty) { if (!bountyReduction) { return bounty; } reducedBounty = _reduceBountyByDowntime(bounty, nodeIndex, downtime, nodes, constants); if (latency > constants.allowableLatency()) { // reduce bounty because latency is too big reducedBounty = reducedBounty.mul(constants.allowableLatency()).div(latency); } if (!nodes.checkPossibilityToMaintainNode(nodes.getValidatorId(nodeIndex), nodeIndex)) { reducedBounty = reducedBounty.div(constants.MSR_REDUCING_COEFFICIENT()); } } function _reduceBountyByDowntime( uint bounty, uint nodeIndex, uint downtime, Nodes nodes, ConstantsHolder constants ) private view returns (uint reducedBounty) { reducedBounty = bounty; uint getBountyDeadline = uint(nodes.getNodeLastRewardDate(nodeIndex)) .add(constants.rewardPeriod()) .add(constants.deltaPeriod()); uint numberOfExpiredIntervals; if (now > getBountyDeadline) { numberOfExpiredIntervals = now.sub(getBountyDeadline).div(constants.checkTime()); } else { numberOfExpiredIntervals = 0; } uint normalDowntime = uint(constants.rewardPeriod()) .sub(constants.deltaPeriod()) .div(constants.checkTime()) .div(constants.DOWNTIME_THRESHOLD_PART()); uint totalDowntime = downtime.add(numberOfExpiredIntervals); if (totalDowntime > normalDowntime) { // reduce bounty because downtime is too big uint penalty = bounty .mul(totalDowntime) .div( uint(constants.rewardPeriod()).sub(constants.deltaPeriod()) .div(constants.checkTime()) ); if (bounty > penalty) { reducedBounty = bounty.sub(penalty); } else { reducedBounty = 0; } } } } contract ConstantsHolder is Permissions { // initial price for creating Node (100 SKL) uint public constant NODE_DEPOSIT = 100 * 1e18; uint8 public constant TOTAL_SPACE_ON_NODE = 128; // part of Node for Small Skale-chain (1/128 of Node) uint8 public constant SMALL_DIVISOR = 128; // part of Node for Medium Skale-chain (1/8 of Node) uint8 public constant MEDIUM_DIVISOR = 8; // part of Node for Large Skale-chain (full Node) uint8 public constant LARGE_DIVISOR = 1; // part of Node for Medium Test Skale-chain (1/4 of Node) uint8 public constant MEDIUM_TEST_DIVISOR = 4; // typically number of Nodes for Skale-chain (16 Nodes) uint public constant NUMBER_OF_NODES_FOR_SCHAIN = 16; // number of Nodes for Test Skale-chain (2 Nodes) uint public constant NUMBER_OF_NODES_FOR_TEST_SCHAIN = 2; // number of Nodes for Test Skale-chain (4 Nodes) uint public constant NUMBER_OF_NODES_FOR_MEDIUM_TEST_SCHAIN = 4; // number of seconds in one year uint32 public constant SECONDS_TO_YEAR = 31622400; // initial number of monitors uint public constant NUMBER_OF_MONITORS = 24; uint public constant OPTIMAL_LOAD_PERCENTAGE = 80; uint public constant ADJUSTMENT_SPEED = 1000; uint public constant COOLDOWN_TIME = 60; uint public constant MIN_PRICE = 10**6; uint public constant MSR_REDUCING_COEFFICIENT = 2; uint public constant DOWNTIME_THRESHOLD_PART = 30; uint public constant BOUNTY_LOCKUP_MONTHS = 2; // MSR - Minimum staking requirement uint public msr; // Reward period - 30 days (each 30 days Node would be granted for bounty) uint32 public rewardPeriod; // Allowable latency - 150000 ms by default uint32 public allowableLatency; /** * Delta period - 1 hour (1 hour before Reward period became Monitors need * to send Verdicts and 1 hour after Reward period became Node need to come * and get Bounty) */ uint32 public deltaPeriod; /** * Check time - 2 minutes (every 2 minutes monitors should check metrics * from checked nodes) */ uint public checkTime; //Need to add minimal allowed parameters for verdicts uint public launchTimestamp; uint public rotationDelay; uint public proofOfUseLockUpPeriodDays; uint public proofOfUseDelegationPercentage; uint public limitValidatorsPerDelegator; uint256 public firstDelegationsMonth; // deprecated // date when schains will be allowed for creation uint public schainCreationTimeStamp; uint public minimalSchainLifetime; /** * Set reward and delta periods to new one, run only by owner. This function * only for tests. * @param newRewardPeriod - new Reward period * @param newDeltaPeriod - new Delta period */ function setPeriods(uint32 newRewardPeriod, uint32 newDeltaPeriod) external onlyOwner { require( newRewardPeriod >= newDeltaPeriod && newRewardPeriod - newDeltaPeriod >= checkTime, "Incorrect Periods" ); rewardPeriod = newRewardPeriod; deltaPeriod = newDeltaPeriod; } /** * Set new check time. This function only for tests. * @param newCheckTime - new check time */ function setCheckTime(uint newCheckTime) external onlyOwner { require(rewardPeriod - deltaPeriod >= checkTime, "Incorrect check time"); checkTime = newCheckTime; } /** * Set latency new one in ms, run only by owner. This function * only for tests. * @param newAllowableLatency - new Allowable Latency */ function setLatency(uint32 newAllowableLatency) external onlyOwner { allowableLatency = newAllowableLatency; } function setMSR(uint newMSR) external onlyOwner { msr = newMSR; } function setLaunchTimestamp(uint timestamp) external onlyOwner { require(now < launchTimestamp, "Can't set network launch timestamp because network is already launched"); launchTimestamp = timestamp; } function setRotationDelay(uint newDelay) external onlyOwner { rotationDelay = newDelay; } function setProofOfUseLockUpPeriod(uint periodDays) external onlyOwner { proofOfUseLockUpPeriodDays = periodDays; } function setProofOfUseDelegationPercentage(uint percentage) external onlyOwner { require(percentage <= 100, "Percentage value is incorrect"); proofOfUseDelegationPercentage = percentage; } function setLimitValidatorsPerDelegator(uint newLimit) external onlyOwner { limitValidatorsPerDelegator = newLimit; } function setSchainCreationTimeStamp(uint timestamp) external onlyOwner { schainCreationTimeStamp = timestamp; } function setMinimalSchainLifetime(uint lifetime) external onlyOwner { minimalSchainLifetime = lifetime; } /** * @dev constructor in Permissions approach * @param contractsAddress needed in Permissions constructor */ function initialize(address contractsAddress) public override initializer { Permissions.initialize(contractsAddress); msr = 0; rewardPeriod = 2592000; allowableLatency = 150000; deltaPeriod = 3600; checkTime = 300; launchTimestamp = uint(-1); rotationDelay = 12 hours; proofOfUseLockUpPeriodDays = 90; proofOfUseDelegationPercentage = 50; limitValidatorsPerDelegator = 20; firstDelegationsMonth = 0; } } contract DelegationController is Permissions, ILocker { using MathUtils for uint; using PartialDifferences for PartialDifferences.Sequence; using PartialDifferences for PartialDifferences.Value; using FractionUtils for FractionUtils.Fraction; enum State { PROPOSED, ACCEPTED, CANCELED, REJECTED, DELEGATED, UNDELEGATION_REQUESTED, COMPLETED } struct Delegation { address holder; // address of token owner uint validatorId; uint amount; uint delegationPeriod; uint created; // time of delegation creation uint started; // month when a delegation becomes active uint finished; // first month after a delegation ends string info; } struct SlashingLogEvent { FractionUtils.Fraction reducingCoefficient; uint nextMonth; } struct SlashingLog { // month => slashing event mapping (uint => SlashingLogEvent) slashes; uint firstMonth; uint lastMonth; } struct DelegationExtras { uint lastSlashingMonthBeforeDelegation; } struct SlashingEvent { FractionUtils.Fraction reducingCoefficient; uint validatorId; uint month; } struct SlashingSignal { address holder; uint penalty; } struct LockedInPending { uint amount; uint month; } struct FirstDelegationMonth { // month uint value; //validatorId => month mapping (uint => uint) byValidator; } struct ValidatorsStatistics { // number of validators uint number; //validatorId => bool - is Delegated or not mapping (uint => uint) delegated; } /** * @dev Emitted when a delegation is proposed to a validator. */ event DelegationProposed( uint delegationId ); /** * @dev Emitted when a delegation is accepted by a validator. */ event DelegationAccepted( uint delegationId ); /** * @dev Emitted when a delegation is cancelled by the delegator. */ event DelegationRequestCanceledByUser( uint delegationId ); /** * @dev Emitted when a delegation is requested to undelegate. */ event UndelegationRequested( uint delegationId ); /// @dev delegations will never be deleted to index in this array may be used like delegation id Delegation[] public delegations; // validatorId => delegationId[] mapping (uint => uint[]) public delegationsByValidator; // holder => delegationId[] mapping (address => uint[]) public delegationsByHolder; // delegationId => extras mapping(uint => DelegationExtras) private _delegationExtras; // validatorId => sequence mapping (uint => PartialDifferences.Value) private _delegatedToValidator; // validatorId => sequence mapping (uint => PartialDifferences.Sequence) private _effectiveDelegatedToValidator; // validatorId => slashing log mapping (uint => SlashingLog) private _slashesOfValidator; // holder => sequence mapping (address => PartialDifferences.Value) private _delegatedByHolder; // holder => validatorId => sequence mapping (address => mapping (uint => PartialDifferences.Value)) private _delegatedByHolderToValidator; // holder => validatorId => sequence mapping (address => mapping (uint => PartialDifferences.Sequence)) private _effectiveDelegatedByHolderToValidator; SlashingEvent[] private _slashes; // holder => index in _slashes; mapping (address => uint) private _firstUnprocessedSlashByHolder; // holder => validatorId => month mapping (address => FirstDelegationMonth) private _firstDelegationMonth; // holder => locked in pending mapping (address => LockedInPending) private _lockedInPendingDelegations; mapping (address => ValidatorsStatistics) private _numberOfValidatorsPerDelegator; /** * @dev Modifier to make a function callable only if delegation exists. */ modifier checkDelegationExists(uint delegationId) { require(delegationId < delegations.length, "Delegation does not exist"); _; } function getAndUpdateDelegatedToValidatorNow(uint validatorId) external returns (uint) { return getAndUpdateDelegatedToValidator(validatorId, _getCurrentMonth()); } function getAndUpdateDelegatedAmount(address holder) external returns (uint) { return _getAndUpdateDelegatedByHolder(holder); } function getAndUpdateEffectiveDelegatedByHolderToValidator(address holder, uint validatorId, uint month) external allow("Distributor") returns (uint effectiveDelegated) { SlashingSignal[] memory slashingSignals = _processAllSlashesWithoutSignals(holder); effectiveDelegated = _effectiveDelegatedByHolderToValidator[holder][validatorId] .getAndUpdateValueInSequence(month); _sendSlashingSignals(slashingSignals); } /** * @dev Allows a token holder to create a delegation proposal of an `amount` * and `delegationPeriod` to a `validatorId`. Delegation must be accepted * by the validator before the UTC start of the month, otherwise the * delegation will be rejected. * * The token holder may add additional information in each proposal. * * @param validatorId uint ID of validator to receive delegation proposal * @param amount uint amount of proposed delegation * @param delegationPeriod uint period of proposed delegation * @param info string extra information provided by the token holder (if any) */ function delegate( uint validatorId, uint amount, uint delegationPeriod, string calldata info ) external { ValidatorService validatorService = ValidatorService(contractManager.getContract("ValidatorService")); DelegationPeriodManager delegationPeriodManager = DelegationPeriodManager( contractManager.getContract("DelegationPeriodManager")); IERC777 skaleToken = IERC777(contractManager.getContract("SkaleToken")); TokenState tokenState = TokenState(contractManager.getContract("TokenState")); require( validatorService.checkMinimumDelegation(validatorId, amount), "Amount does not meet the validator's minimum delegation amount"); require( validatorService.isAuthorizedValidator(validatorId), "Validator is not authorized to accept delegation request"); require( delegationPeriodManager.isDelegationPeriodAllowed(delegationPeriod), "This delegation period is not allowed"); require( validatorService.isAcceptingNewRequests(validatorId), "The validator is not currently accepting new requests"); _checkIfDelegationIsAllowed(msg.sender, validatorId); SlashingSignal[] memory slashingSignals = _processAllSlashesWithoutSignals(msg.sender); uint delegationId = _addDelegation( msg.sender, validatorId, amount, delegationPeriod, info); // check that there is enough money uint holderBalance = skaleToken.balanceOf(msg.sender); uint forbiddenForDelegation = tokenState.getAndUpdateForbiddenForDelegationAmount(msg.sender); require(holderBalance >= forbiddenForDelegation, "Token holder does not have enough tokens to delegate"); emit DelegationProposed(delegationId); _sendSlashingSignals(slashingSignals); } /** * @dev See ILocker. */ function getAndUpdateLockedAmount(address wallet) external override returns (uint) { return _getAndUpdateLockedAmount(wallet); } /** * @dev See ILocker. */ function getAndUpdateForbiddenForDelegationAmount(address wallet) external override returns (uint) { return _getAndUpdateLockedAmount(wallet); } /** * @dev Allows a token holder to cancel a delegation proposal. * * Requirements: * * - the sender must be the token holder of the delegation proposal. * - the delegation must still be in a PROPOSED state. * * Emits a DelegationRequestCanceledByUser event. * * @param delegationId uint ID of delegation proposal */ function cancelPendingDelegation(uint delegationId) external checkDelegationExists(delegationId) { require(msg.sender == delegations[delegationId].holder, "Only token holders can cancel delegation request"); require(getState(delegationId) == State.PROPOSED, "Token holders are only able to cancel PROPOSED delegations"); delegations[delegationId].finished = _getCurrentMonth(); _subtractFromLockedInPendingDelegations(delegations[delegationId].holder, delegations[delegationId].amount); emit DelegationRequestCanceledByUser(delegationId); } /** * @dev Allows a validator to accept a proposed delegation. * Successful acceptance of delegations transition the tokens from a * PROPOSED state to ACCEPTED, and tokens are locked for the remainder of the * delegation period. * * Emits a DelegationAccepted event. * * @param delegationId uint ID of delegation proposal */ function acceptPendingDelegation(uint delegationId) external checkDelegationExists(delegationId) { ValidatorService validatorService = ValidatorService(contractManager.getContract("ValidatorService")); require( validatorService.checkValidatorAddressToId(msg.sender, delegations[delegationId].validatorId), "No permissions to accept request"); _checkIfDelegationIsAllowed(delegations[delegationId].holder, delegations[delegationId].validatorId); State currentState = getState(delegationId); if (currentState != State.PROPOSED) { if (currentState == State.ACCEPTED || currentState == State.DELEGATED || currentState == State.UNDELEGATION_REQUESTED || currentState == State.COMPLETED) { revert("The delegation has been already accepted"); } else if (currentState == State.CANCELED) { revert("The delegation has been cancelled by token holder"); } else if (currentState == State.REJECTED) { revert("The delegation request is outdated"); } } require(currentState == State.PROPOSED, "Cannot set delegation state to accepted"); TokenLaunchLocker tokenLaunchLocker = TokenLaunchLocker(contractManager.getContract("TokenLaunchLocker")); SlashingSignal[] memory slashingSignals = _processAllSlashesWithoutSignals(delegations[delegationId].holder); _addToAllStatistics(delegationId); tokenLaunchLocker.handleDelegationAdd( delegations[delegationId].holder, delegationId, delegations[delegationId].amount, delegations[delegationId].started); _sendSlashingSignals(slashingSignals); emit DelegationAccepted(delegationId); } /** * @dev Allows a delegator to undelegate a specific delegation. * * Requirements: * * - the sender must be the delegator. * - the delegation must be in DELEGATED state. * * Emits an UndelegationRequested event. * * @param delegationId uint ID of delegation to undelegate */ function requestUndelegation(uint delegationId) external checkDelegationExists(delegationId) { require(getState(delegationId) == State.DELEGATED, "Cannot request undelegation"); ValidatorService validatorService = ValidatorService(contractManager.getContract("ValidatorService")); require( delegations[delegationId].holder == msg.sender || (validatorService.validatorAddressExists(msg.sender) && delegations[delegationId].validatorId == validatorService.getValidatorId(msg.sender)), "Permission denied to request undelegation"); TokenLaunchLocker tokenLaunchLocker = TokenLaunchLocker(contractManager.getContract("TokenLaunchLocker")); DelegationPeriodManager delegationPeriodManager = DelegationPeriodManager( contractManager.getContract("DelegationPeriodManager")); _removeValidatorFromValidatorsPerDelegators( delegations[delegationId].holder, delegations[delegationId].validatorId ); processAllSlashes(msg.sender); delegations[delegationId].finished = _calculateDelegationEndMonth(delegationId); uint amountAfterSlashing = _calculateDelegationAmountAfterSlashing(delegationId); _removeFromDelegatedToValidator( delegations[delegationId].validatorId, amountAfterSlashing, delegations[delegationId].finished); _removeFromDelegatedByHolder( delegations[delegationId].holder, amountAfterSlashing, delegations[delegationId].finished); _removeFromDelegatedByHolderToValidator( delegations[delegationId].holder, delegations[delegationId].validatorId, amountAfterSlashing, delegations[delegationId].finished); uint effectiveAmount = amountAfterSlashing.mul(delegationPeriodManager.stakeMultipliers( delegations[delegationId].delegationPeriod)); _removeFromEffectiveDelegatedToValidator( delegations[delegationId].validatorId, effectiveAmount, delegations[delegationId].finished); _removeFromEffectiveDelegatedByHolderToValidator( delegations[delegationId].holder, delegations[delegationId].validatorId, effectiveAmount, delegations[delegationId].finished); tokenLaunchLocker.handleDelegationRemoving( delegations[delegationId].holder, delegationId, delegations[delegationId].finished); emit UndelegationRequested(delegationId); } /** * @dev Allows the Punisher to confiscate an `amount` of stake from * `validatorId` by slashing. This slashes all delegations of the validator, * which reduces the amount that the validator has staked. This consequence * may force the SKALE Manger to reduce the number of nodes a validator is * operating so the validator can meet the Minimum Staking Requirement. * * See Punisher. * * Emits a SlashingEvent. * * @param validatorId uint validator to slash * @param amount uint amount to slash * */ function confiscate(uint validatorId, uint amount) external allow("Punisher") { uint currentMonth = _getCurrentMonth(); FractionUtils.Fraction memory coefficient = _delegatedToValidator[validatorId].reduceValue(amount, currentMonth); _effectiveDelegatedToValidator[validatorId].reduceSequence(coefficient, currentMonth); _putToSlashingLog(_slashesOfValidator[validatorId], coefficient, currentMonth); _slashes.push(SlashingEvent({reducingCoefficient: coefficient, validatorId: validatorId, month: currentMonth})); } function getAndUpdateEffectiveDelegatedToValidator(uint validatorId, uint month) external allow("Distributor") returns (uint) { return _effectiveDelegatedToValidator[validatorId].getAndUpdateValueInSequence(month); } function getAndUpdateDelegatedByHolderToValidatorNow(address holder, uint validatorId) external returns (uint) { return _getAndUpdateDelegatedByHolderToValidator(holder, validatorId, _getCurrentMonth()); } function getDelegation(uint delegationId) external view checkDelegationExists(delegationId) returns (Delegation memory) { return delegations[delegationId]; } function getFirstDelegationMonth(address holder, uint validatorId) external view returns(uint) { return _firstDelegationMonth[holder].byValidator[validatorId]; } function getDelegationsByValidatorLength(uint validatorId) external view returns (uint) { return delegationsByValidator[validatorId].length; } function getDelegationsByHolderLength(address holder) external view returns (uint) { return delegationsByHolder[holder].length; } function initialize(address contractsAddress) public override initializer { Permissions.initialize(contractsAddress); } function getAndUpdateDelegatedToValidator(uint validatorId, uint month) public allow("Nodes") returns (uint) { return _delegatedToValidator[validatorId].getAndUpdateValue(month); } function processSlashes(address holder, uint limit) public { _sendSlashingSignals(_processSlashesWithoutSignals(holder, limit)); } function processAllSlashes(address holder) public { processSlashes(holder, 0); } /** * @dev Returns the token state of a given delegation. * * @param delegationId uint ID of the delegation */ function getState(uint delegationId) public view checkDelegationExists(delegationId) returns (State state) { if (delegations[delegationId].started == 0) { if (delegations[delegationId].finished == 0) { TimeHelpers timeHelpers = TimeHelpers(contractManager.getContract("TimeHelpers")); if (_getCurrentMonth() == timeHelpers.timestampToMonth(delegations[delegationId].created)) { return State.PROPOSED; } else { return State.REJECTED; } } else { return State.CANCELED; } } else { if (_getCurrentMonth() < delegations[delegationId].started) { return State.ACCEPTED; } else { if (delegations[delegationId].finished == 0) { return State.DELEGATED; } else { if (_getCurrentMonth() < delegations[delegationId].finished) { return State.UNDELEGATION_REQUESTED; } else { return State.COMPLETED; } } } } } function getLockedInPendingDelegations(address holder) public view returns (uint) { uint currentMonth = _getCurrentMonth(); if (_lockedInPendingDelegations[holder].month < currentMonth) { return 0; } else { return _lockedInPendingDelegations[holder].amount; } } function hasUnprocessedSlashes(address holder) public view returns (bool) { return _everDelegated(holder) && _firstUnprocessedSlashByHolder[holder] < _slashes.length; } // private function _addDelegation( address holder, uint validatorId, uint amount, uint delegationPeriod, string memory info ) private returns (uint delegationId) { delegationId = delegations.length; delegations.push(Delegation( holder, validatorId, amount, delegationPeriod, now, 0, 0, info )); delegationsByValidator[validatorId].push(delegationId); delegationsByHolder[holder].push(delegationId); _addToLockedInPendingDelegations(delegations[delegationId].holder, delegations[delegationId].amount); } function _calculateDelegationEndMonth(uint delegationId) private view returns (uint) { uint currentMonth = _getCurrentMonth(); uint started = delegations[delegationId].started; if (currentMonth < started) { return started.add(delegations[delegationId].delegationPeriod); } else { uint completedPeriods = currentMonth.sub(started).div(delegations[delegationId].delegationPeriod); return started.add(completedPeriods.add(1).mul(delegations[delegationId].delegationPeriod)); } } function _addToDelegatedToValidator(uint validatorId, uint amount, uint month) private { _delegatedToValidator[validatorId].addToValue(amount, month); } function _addToEffectiveDelegatedToValidator(uint validatorId, uint effectiveAmount, uint month) private { _effectiveDelegatedToValidator[validatorId].addToSequence(effectiveAmount, month); } function _addToDelegatedByHolder(address holder, uint amount, uint month) private { _delegatedByHolder[holder].addToValue(amount, month); } function _addToDelegatedByHolderToValidator( address holder, uint validatorId, uint amount, uint month) private { _delegatedByHolderToValidator[holder][validatorId].addToValue(amount, month); } function _addValidatorToValidatorsPerDelegators(address holder, uint validatorId) private { if (_numberOfValidatorsPerDelegator[holder].delegated[validatorId] == 0) { _numberOfValidatorsPerDelegator[holder].number = _numberOfValidatorsPerDelegator[holder].number.add(1); } _numberOfValidatorsPerDelegator[holder]. delegated[validatorId] = _numberOfValidatorsPerDelegator[holder].delegated[validatorId].add(1); } function _removeFromDelegatedByHolder(address holder, uint amount, uint month) private { _delegatedByHolder[holder].subtractFromValue(amount, month); } function _removeFromDelegatedByHolderToValidator( address holder, uint validatorId, uint amount, uint month) private { _delegatedByHolderToValidator[holder][validatorId].subtractFromValue(amount, month); } function _removeValidatorFromValidatorsPerDelegators(address holder, uint validatorId) private { if (_numberOfValidatorsPerDelegator[holder].delegated[validatorId] == 1) { _numberOfValidatorsPerDelegator[holder].number = _numberOfValidatorsPerDelegator[holder].number.sub(1); } _numberOfValidatorsPerDelegator[holder]. delegated[validatorId] = _numberOfValidatorsPerDelegator[holder].delegated[validatorId].sub(1); } function _addToEffectiveDelegatedByHolderToValidator( address holder, uint validatorId, uint effectiveAmount, uint month) private { _effectiveDelegatedByHolderToValidator[holder][validatorId].addToSequence(effectiveAmount, month); } function _removeFromEffectiveDelegatedByHolderToValidator( address holder, uint validatorId, uint effectiveAmount, uint month) private { _effectiveDelegatedByHolderToValidator[holder][validatorId].subtractFromSequence(effectiveAmount, month); } function _getAndUpdateDelegatedByHolder(address holder) private returns (uint) { uint currentMonth = _getCurrentMonth(); processAllSlashes(holder); return _delegatedByHolder[holder].getAndUpdateValue(currentMonth); } function _getAndUpdateDelegatedByHolderToValidator( address holder, uint validatorId, uint month) private returns (uint) { return _delegatedByHolderToValidator[holder][validatorId].getAndUpdateValue(month); } function _addToLockedInPendingDelegations(address holder, uint amount) private returns (uint) { uint currentMonth = _getCurrentMonth(); if (_lockedInPendingDelegations[holder].month < currentMonth) { _lockedInPendingDelegations[holder].amount = amount; _lockedInPendingDelegations[holder].month = currentMonth; } else { assert(_lockedInPendingDelegations[holder].month == currentMonth); _lockedInPendingDelegations[holder].amount = _lockedInPendingDelegations[holder].amount.add(amount); } } function _subtractFromLockedInPendingDelegations(address holder, uint amount) private returns (uint) { uint currentMonth = _getCurrentMonth(); require( _lockedInPendingDelegations[holder].month == currentMonth, "There are no delegation requests this month"); require(_lockedInPendingDelegations[holder].amount >= amount, "Unlocking amount is too big"); _lockedInPendingDelegations[holder].amount = _lockedInPendingDelegations[holder].amount.sub(amount); } function _getCurrentMonth() private view returns (uint) { TimeHelpers timeHelpers = TimeHelpers(contractManager.getContract("TimeHelpers")); return timeHelpers.getCurrentMonth(); } function _getAndUpdateLockedAmount(address wallet) private returns (uint) { return _getAndUpdateDelegatedByHolder(wallet).add(getLockedInPendingDelegations(wallet)); } function _updateFirstDelegationMonth(address holder, uint validatorId, uint month) private { if (_firstDelegationMonth[holder].value == 0) { _firstDelegationMonth[holder].value = month; _firstUnprocessedSlashByHolder[holder] = _slashes.length; } if (_firstDelegationMonth[holder].byValidator[validatorId] == 0) { _firstDelegationMonth[holder].byValidator[validatorId] = month; } } function _everDelegated(address holder) private view returns (bool) { return _firstDelegationMonth[holder].value > 0; } function _removeFromDelegatedToValidator(uint validatorId, uint amount, uint month) private { _delegatedToValidator[validatorId].subtractFromValue(amount, month); } function _removeFromEffectiveDelegatedToValidator(uint validatorId, uint effectiveAmount, uint month) private { _effectiveDelegatedToValidator[validatorId].subtractFromSequence(effectiveAmount, month); } function _calculateDelegationAmountAfterSlashing(uint delegationId) private view returns (uint) { uint startMonth = _delegationExtras[delegationId].lastSlashingMonthBeforeDelegation; uint validatorId = delegations[delegationId].validatorId; uint amount = delegations[delegationId].amount; if (startMonth == 0) { startMonth = _slashesOfValidator[validatorId].firstMonth; if (startMonth == 0) { return amount; } } for (uint i = startMonth; i > 0 && i < delegations[delegationId].finished; i = _slashesOfValidator[validatorId].slashes[i].nextMonth) { if (i >= delegations[delegationId].started) { amount = amount .mul(_slashesOfValidator[validatorId].slashes[i].reducingCoefficient.numerator) .div(_slashesOfValidator[validatorId].slashes[i].reducingCoefficient.denominator); } } return amount; } function _putToSlashingLog( SlashingLog storage log, FractionUtils.Fraction memory coefficient, uint month) private { if (log.firstMonth == 0) { log.firstMonth = month; log.lastMonth = month; log.slashes[month].reducingCoefficient = coefficient; log.slashes[month].nextMonth = 0; } else { require(log.lastMonth <= month, "Cannot put slashing event in the past"); if (log.lastMonth == month) { log.slashes[month].reducingCoefficient = log.slashes[month].reducingCoefficient.multiplyFraction(coefficient); } else { log.slashes[month].reducingCoefficient = coefficient; log.slashes[month].nextMonth = 0; log.slashes[log.lastMonth].nextMonth = month; log.lastMonth = month; } } } function _processSlashesWithoutSignals(address holder, uint limit) private returns (SlashingSignal[] memory slashingSignals) { if (hasUnprocessedSlashes(holder)) { uint index = _firstUnprocessedSlashByHolder[holder]; uint end = _slashes.length; if (limit > 0 && index.add(limit) < end) { end = index.add(limit); } slashingSignals = new SlashingSignal[](end.sub(index)); uint begin = index; for (; index < end; ++index) { uint validatorId = _slashes[index].validatorId; uint month = _slashes[index].month; uint oldValue = _getAndUpdateDelegatedByHolderToValidator(holder, validatorId, month); if (oldValue.muchGreater(0)) { _delegatedByHolderToValidator[holder][validatorId].reduceValueByCoefficientAndUpdateSum( _delegatedByHolder[holder], _slashes[index].reducingCoefficient, month); _effectiveDelegatedByHolderToValidator[holder][validatorId].reduceSequence( _slashes[index].reducingCoefficient, month); slashingSignals[index.sub(begin)].holder = holder; slashingSignals[index.sub(begin)].penalty = oldValue.boundedSub(_getAndUpdateDelegatedByHolderToValidator(holder, validatorId, month)); } } _firstUnprocessedSlashByHolder[holder] = end; } } function _processAllSlashesWithoutSignals(address holder) private returns (SlashingSignal[] memory slashingSignals) { return _processSlashesWithoutSignals(holder, 0); } function _sendSlashingSignals(SlashingSignal[] memory slashingSignals) private { Punisher punisher = Punisher(contractManager.getContract("Punisher")); address previousHolder = address(0); uint accumulatedPenalty = 0; for (uint i = 0; i < slashingSignals.length; ++i) { if (slashingSignals[i].holder != previousHolder) { if (accumulatedPenalty > 0) { punisher.handleSlash(previousHolder, accumulatedPenalty); } previousHolder = slashingSignals[i].holder; accumulatedPenalty = slashingSignals[i].penalty; } else { accumulatedPenalty = accumulatedPenalty.add(slashingSignals[i].penalty); } } if (accumulatedPenalty > 0) { punisher.handleSlash(previousHolder, accumulatedPenalty); } } function _addToAllStatistics(uint delegationId) private { DelegationPeriodManager delegationPeriodManager = DelegationPeriodManager( contractManager.getContract("DelegationPeriodManager")); uint currentMonth = _getCurrentMonth(); delegations[delegationId].started = currentMonth.add(1); if (_slashesOfValidator[delegations[delegationId].validatorId].lastMonth > 0) { _delegationExtras[delegationId].lastSlashingMonthBeforeDelegation = _slashesOfValidator[delegations[delegationId].validatorId].lastMonth; } _addToDelegatedToValidator( delegations[delegationId].validatorId, delegations[delegationId].amount, currentMonth.add(1)); _addToDelegatedByHolder( delegations[delegationId].holder, delegations[delegationId].amount, currentMonth.add(1)); _addToDelegatedByHolderToValidator( delegations[delegationId].holder, delegations[delegationId].validatorId, delegations[delegationId].amount, currentMonth.add(1)); _updateFirstDelegationMonth( delegations[delegationId].holder, delegations[delegationId].validatorId, currentMonth.add(1)); uint effectiveAmount = delegations[delegationId].amount.mul(delegationPeriodManager.stakeMultipliers( delegations[delegationId].delegationPeriod)); _addToEffectiveDelegatedToValidator( delegations[delegationId].validatorId, effectiveAmount, currentMonth.add(1)); _addToEffectiveDelegatedByHolderToValidator( delegations[delegationId].holder, delegations[delegationId].validatorId, effectiveAmount, currentMonth.add(1)); _addValidatorToValidatorsPerDelegators( delegations[delegationId].holder, delegations[delegationId].validatorId ); } function _checkIfDelegationIsAllowed(address holder, uint validatorId) private view returns (bool) { ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); require( _numberOfValidatorsPerDelegator[holder].delegated[validatorId] > 0 || ( _numberOfValidatorsPerDelegator[holder].delegated[validatorId] == 0 && _numberOfValidatorsPerDelegator[holder].number < constantsHolder.limitValidatorsPerDelegator() ), "Limit of validators is reached" ); } } contract DelegationPeriodManager is Permissions { /** * @dev Emitted when a new delegation period is specified. */ event DelegationPeriodWasSet( uint length, uint stakeMultiplier ); mapping (uint => uint) public stakeMultipliers; /** * @dev Creates a new available delegation period and return in the network. * Only the owner may set new delegation period and returns in the network. * * Emits a DelegationPeriodWasSet event. * * @param monthsCount uint delegation duration in months * @param stakeMultiplier uint return for delegation */ function setDelegationPeriod(uint monthsCount, uint stakeMultiplier) external onlyOwner { stakeMultipliers[monthsCount] = stakeMultiplier; emit DelegationPeriodWasSet(monthsCount, stakeMultiplier); } /** * @dev Checks whether given delegation period is allowed. * * @param monthsCount uint delegation duration in months * @return bool True if delegation period is allowed */ function isDelegationPeriodAllowed(uint monthsCount) external view returns (bool) { return stakeMultipliers[monthsCount] != 0 ? true : false; } /** * @dev Initial delegation period and multiplier settings. */ function initialize(address contractsAddress) public override initializer { Permissions.initialize(contractsAddress); stakeMultipliers[3] = 100; // 3 months at 100 // stakeMultipliers[6] = 150; // 6 months at 150 // stakeMultipliers[12] = 200; // 12 months at 200 } } contract Distributor is Permissions, IERC777Recipient { using MathUtils for uint; /** * @dev Emitted when a bounty is withdrawn by the token holder. */ event WithdrawBounty( address holder, uint validatorId, address destination, uint amount ); /** * @dev Emitted when a validator fee is withdrawn by the validator. */ event WithdrawFee( uint validatorId, address destination, uint amount ); /** * @dev Emitted when a bounty is distributed. */ event BountyWasPaid( uint validatorId, uint amount ); IERC1820Registry private _erc1820; // validatorId => month => token mapping (uint => mapping (uint => uint)) private _bountyPaid; // validatorId => month => token mapping (uint => mapping (uint => uint)) private _feePaid; // holder => validatorId => month mapping (address => mapping (uint => uint)) private _firstUnwithdrawnMonth; // validatorId => month mapping (uint => uint) private _firstUnwithdrawnMonthForValidator; function getAndUpdateEarnedBountyAmount(uint validatorId) external returns (uint earned, uint endMonth) { return getAndUpdateEarnedBountyAmountOf(msg.sender, validatorId); } function withdrawBounty(uint validatorId, address to) external { TimeHelpers timeHelpers = TimeHelpers(contractManager.getContract("TimeHelpers")); ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); require(now >= timeHelpers.addMonths( constantsHolder.launchTimestamp(), constantsHolder.BOUNTY_LOCKUP_MONTHS() ), "Bounty is locked"); uint bounty; uint endMonth; (bounty, endMonth) = getAndUpdateEarnedBountyAmountOf(msg.sender, validatorId); _firstUnwithdrawnMonth[msg.sender][validatorId] = endMonth; IERC20 skaleToken = IERC20(contractManager.getContract("SkaleToken")); require(skaleToken.transfer(to, bounty), "Failed to transfer tokens"); emit WithdrawBounty( msg.sender, validatorId, to, bounty ); } function withdrawFee(address to) external { ValidatorService validatorService = ValidatorService(contractManager.getContract("ValidatorService")); IERC20 skaleToken = IERC20(contractManager.getContract("SkaleToken")); TimeHelpers timeHelpers = TimeHelpers(contractManager.getContract("TimeHelpers")); ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); require(now >= timeHelpers.addMonths( constantsHolder.launchTimestamp(), constantsHolder.BOUNTY_LOCKUP_MONTHS() ), "Bounty is locked"); // check Validator Exist inside getValidatorId uint validatorId = validatorService.getValidatorId(msg.sender); uint fee; uint endMonth; (fee, endMonth) = getEarnedFeeAmountOf(validatorId); _firstUnwithdrawnMonthForValidator[validatorId] = endMonth; require(skaleToken.transfer(to, fee), "Failed to transfer tokens"); emit WithdrawFee( validatorId, to, fee ); } function tokensReceived( address, address, address to, uint256 amount, bytes calldata userData, bytes calldata ) external override allow("SkaleToken") { require(to == address(this), "Receiver is incorrect"); require(userData.length == 32, "Data length is incorrect"); uint validatorId = abi.decode(userData, (uint)); _distributeBounty(amount, validatorId); } function getEarnedFeeAmount() external view returns (uint earned, uint endMonth) { ValidatorService validatorService = ValidatorService(contractManager.getContract("ValidatorService")); return getEarnedFeeAmountOf(validatorService.getValidatorId(msg.sender)); } function initialize(address contractsAddress) public override initializer { Permissions.initialize(contractsAddress); _erc1820 = IERC1820Registry(0x1820a4B7618BdE71Dce8cdc73aAB6C95905faD24); _erc1820.setInterfaceImplementer(address(this), keccak256("ERC777TokensRecipient"), address(this)); } function getAndUpdateEarnedBountyAmountOf(address wallet, uint validatorId) public returns (uint earned, uint endMonth) { DelegationController delegationController = DelegationController( contractManager.getContract("DelegationController")); TimeHelpers timeHelpers = TimeHelpers(contractManager.getContract("TimeHelpers")); uint currentMonth = timeHelpers.getCurrentMonth(); uint startMonth = _firstUnwithdrawnMonth[wallet][validatorId]; if (startMonth == 0) { startMonth = delegationController.getFirstDelegationMonth(wallet, validatorId); if (startMonth == 0) { return (0, 0); } } earned = 0; endMonth = currentMonth; if (endMonth > startMonth.add(12)) { endMonth = startMonth.add(12); } for (uint i = startMonth; i < endMonth; ++i) { uint effectiveDelegatedToValidator = delegationController.getAndUpdateEffectiveDelegatedToValidator(validatorId, i); if (effectiveDelegatedToValidator.muchGreater(0)) { earned = earned.add( _bountyPaid[validatorId][i].mul( delegationController.getAndUpdateEffectiveDelegatedByHolderToValidator(wallet, validatorId, i)) .div(effectiveDelegatedToValidator) ); } } } function getEarnedFeeAmountOf(uint validatorId) public view returns (uint earned, uint endMonth) { TimeHelpers timeHelpers = TimeHelpers(contractManager.getContract("TimeHelpers")); uint currentMonth = timeHelpers.getCurrentMonth(); uint startMonth = _firstUnwithdrawnMonthForValidator[validatorId]; if (startMonth == 0) { return (0, 0); } earned = 0; endMonth = currentMonth; if (endMonth > startMonth.add(12)) { endMonth = startMonth.add(12); } for (uint i = startMonth; i < endMonth; ++i) { earned = earned.add(_feePaid[validatorId][i]); } } // private function _distributeBounty(uint amount, uint validatorId) private { TimeHelpers timeHelpers = TimeHelpers(contractManager.getContract("TimeHelpers")); ValidatorService validatorService = ValidatorService(contractManager.getContract("ValidatorService")); uint currentMonth = timeHelpers.getCurrentMonth(); uint feeRate = validatorService.getValidator(validatorId).feeRate; uint fee = amount.mul(feeRate).div(1000); uint bounty = amount.sub(fee); _bountyPaid[validatorId][currentMonth] = _bountyPaid[validatorId][currentMonth].add(bounty); _feePaid[validatorId][currentMonth] = _feePaid[validatorId][currentMonth].add(fee); if (_firstUnwithdrawnMonthForValidator[validatorId] == 0) { _firstUnwithdrawnMonthForValidator[validatorId] = currentMonth; } emit BountyWasPaid(validatorId, amount); } } contract KeyStorage is Permissions { using Fp2Operations for Fp2Operations.Fp2Point; using G2Operations for G2Operations.G2Point; struct BroadcastedData { KeyShare[] secretKeyContribution; G2Operations.G2Point[] verificationVector; } struct KeyShare { bytes32[2] publicKey; bytes32 share; } // Unused variable!! mapping(bytes32 => mapping(uint => BroadcastedData)) private _data; // mapping(bytes32 => G2Operations.G2Point) private _publicKeysInProgress; mapping(bytes32 => G2Operations.G2Point) private _schainsPublicKeys; // Unused variable mapping(bytes32 => G2Operations.G2Point[]) private _schainsNodesPublicKeys; // mapping(bytes32 => G2Operations.G2Point[]) private _previousSchainsPublicKeys; function deleteKey(bytes32 groupIndex) external allow("SkaleDKG") { _previousSchainsPublicKeys[groupIndex].push(_schainsPublicKeys[groupIndex]); delete _schainsPublicKeys[groupIndex]; } function initPublicKeyInProgress(bytes32 groupIndex) external allow("SkaleDKG") { _publicKeysInProgress[groupIndex] = G2Operations.getG2Zero(); } function adding(bytes32 groupIndex, G2Operations.G2Point memory value) external allow("SkaleDKG") { require(value.isG2(), "Incorrect g2 point"); _publicKeysInProgress[groupIndex] = value.addG2(_publicKeysInProgress[groupIndex]); } function finalizePublicKey(bytes32 groupIndex) external allow("SkaleDKG") { if (!_isSchainsPublicKeyZero(groupIndex)) { _previousSchainsPublicKeys[groupIndex].push(_schainsPublicKeys[groupIndex]); } _schainsPublicKeys[groupIndex] = _publicKeysInProgress[groupIndex]; delete _publicKeysInProgress[groupIndex]; } function getCommonPublicKey(bytes32 groupIndex) external view returns (G2Operations.G2Point memory) { return _schainsPublicKeys[groupIndex]; } function getPreviousPublicKey(bytes32 groupIndex) external view returns (G2Operations.G2Point memory) { uint length = _previousSchainsPublicKeys[groupIndex].length; if (length == 0) { return G2Operations.getG2Zero(); } return _previousSchainsPublicKeys[groupIndex][length - 1]; } function getAllPreviousPublicKeys(bytes32 groupIndex) external view returns (G2Operations.G2Point[] memory) { return _previousSchainsPublicKeys[groupIndex]; } function initialize(address contractsAddress) public override initializer { Permissions.initialize(contractsAddress); } function _isSchainsPublicKeyZero(bytes32 schainId) private view returns (bool) { return _schainsPublicKeys[schainId].x.a == 0 && _schainsPublicKeys[schainId].x.b == 0 && _schainsPublicKeys[schainId].y.a == 0 && _schainsPublicKeys[schainId].y.b == 0; } function _getData() private view returns (BroadcastedData memory) { return _data[keccak256(abi.encodePacked("UnusedFunction"))][0]; } function _getNodesPublicKey() private view returns (G2Operations.G2Point memory) { return _schainsNodesPublicKeys[keccak256(abi.encodePacked("UnusedFunction"))][0]; } } contract Monitors is Permissions { using StringUtils for string; using SafeCast for uint; struct Verdict { uint toNodeIndex; uint32 downtime; uint32 latency; } struct CheckedNode { uint nodeIndex; uint time; } struct CheckedNodeWithIp { uint nodeIndex; uint time; bytes4 ip; } mapping (bytes32 => CheckedNode[]) public checkedNodes; mapping (bytes32 => uint[][]) public verdicts; mapping (bytes32 => uint[]) public groupsForMonitors; mapping (bytes32 => uint) public lastVerdictBlocks; mapping (bytes32 => uint) public lastBountyBlocks; event MonitorCreated( uint nodeIndex, bytes32 monitorIndex, uint numberOfMonitors, uint[] nodesInGroup, uint time, uint gasSpend ); event VerdictWasSent( uint indexed fromMonitorIndex, uint indexed toNodeIndex, uint32 downtime, uint32 latency, bool status, uint previousBlockEvent, uint time, uint gasSpend ); event MetricsWereCalculated( uint forNodeIndex, uint32 averageDowntime, uint32 averageLatency, uint time, uint gasSpend ); event PeriodsWereSet( uint rewardPeriod, uint deltaPeriod, uint time, uint gasSpend ); event MonitorRotated( bytes32 monitorIndex, uint newNode ); /** * addMonitor - setup monitors of node */ function addMonitor(uint nodeIndex) external allow("SkaleManager") { ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); bytes32 monitorIndex = keccak256(abi.encodePacked(nodeIndex)); _generateGroup(monitorIndex, nodeIndex, constantsHolder.NUMBER_OF_MONITORS()); CheckedNode memory checkedNode = _getCheckedNodeData(nodeIndex); for (uint i = 0; i < groupsForMonitors[monitorIndex].length; i++) { bytes32 index = keccak256(abi.encodePacked(groupsForMonitors[monitorIndex][i])); addCheckedNode(index, checkedNode); } emit MonitorCreated( nodeIndex, monitorIndex, groupsForMonitors[monitorIndex].length, groupsForMonitors[monitorIndex], block.timestamp, gasleft() ); } function deleteMonitor(uint nodeIndex) external allow("SkaleManager") { bytes32 monitorIndex = keccak256(abi.encodePacked(nodeIndex)); while (verdicts[keccak256(abi.encodePacked(nodeIndex))].length > 0) { verdicts[keccak256(abi.encodePacked(nodeIndex))].pop(); } uint[] memory nodesInGroup = groupsForMonitors[monitorIndex]; uint index; bytes32 monitoringIndex; for (uint i = 0; i < nodesInGroup.length; i++) { monitoringIndex = keccak256(abi.encodePacked(nodesInGroup[i])); (index, ) = _find(monitoringIndex, nodeIndex); if (index < checkedNodes[monitoringIndex].length) { if (index != checkedNodes[monitoringIndex].length.sub(1)) { checkedNodes[monitoringIndex][index] = checkedNodes[monitoringIndex][checkedNodes[monitoringIndex].length.sub(1)]; } checkedNodes[monitoringIndex].pop(); } } delete groupsForMonitors[monitorIndex]; } function removeCheckedNodes(uint nodeIndex) external allow("SkaleManager") { bytes32 monitorIndex = keccak256(abi.encodePacked(nodeIndex)); delete checkedNodes[monitorIndex]; } function sendVerdict(uint fromMonitorIndex, Verdict calldata verdict) external allow("SkaleManager") { uint index; uint time; bytes32 monitorIndex = keccak256(abi.encodePacked(fromMonitorIndex)); (index, time) = _find(monitorIndex, verdict.toNodeIndex); require(time > 0, "Checked Node does not exist in MonitorsArray"); if (time <= block.timestamp) { if (index != checkedNodes[monitorIndex].length.sub(1)) { checkedNodes[monitorIndex][index] = checkedNodes[monitorIndex][checkedNodes[monitorIndex].length.sub(1)]; } delete checkedNodes[monitorIndex][checkedNodes[monitorIndex].length.sub(1)]; checkedNodes[monitorIndex].pop(); ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); bool receiveVerdict = time.add(constantsHolder.deltaPeriod()) > block.timestamp; if (receiveVerdict) { verdicts[keccak256(abi.encodePacked(verdict.toNodeIndex))].push( [uint(verdict.downtime), uint(verdict.latency)] ); } _emitVerdictsEvent(fromMonitorIndex, verdict, receiveVerdict); } } function calculateMetrics(uint nodeIndex) external allow("SkaleManager") returns (uint averageDowntime, uint averageLatency) { bytes32 monitorIndex = keccak256(abi.encodePacked(nodeIndex)); uint lengthOfArray = getLengthOfMetrics(monitorIndex); uint[] memory downtimeArray = new uint[](lengthOfArray); uint[] memory latencyArray = new uint[](lengthOfArray); for (uint i = 0; i < lengthOfArray; i++) { downtimeArray[i] = verdicts[monitorIndex][i][0]; latencyArray[i] = verdicts[monitorIndex][i][1]; } if (lengthOfArray > 0) { averageDowntime = _median(downtimeArray); averageLatency = _median(latencyArray); } delete verdicts[monitorIndex]; } function setLastBountyBlock(uint nodeIndex) external allow("SkaleManager") { lastBountyBlocks[keccak256(abi.encodePacked(nodeIndex))] = block.number; } function getCheckedArray(bytes32 monitorIndex) external view returns (CheckedNodeWithIp[] memory checkedNodesWithIp) { Nodes nodes = Nodes(contractManager.getContract("Nodes")); checkedNodesWithIp = new CheckedNodeWithIp[](checkedNodes[monitorIndex].length); for (uint i = 0; i < checkedNodes[monitorIndex].length; ++i) { checkedNodesWithIp[i].nodeIndex = checkedNodes[monitorIndex][i].nodeIndex; checkedNodesWithIp[i].time = checkedNodes[monitorIndex][i].time; checkedNodesWithIp[i].ip = nodes.getNodeIP(checkedNodes[monitorIndex][i].nodeIndex); } } function getLastBountyBlock(uint nodeIndex) external view returns (uint) { return lastBountyBlocks[keccak256(abi.encodePacked(nodeIndex))]; } function getNodesInGroup(bytes32 monitorIndex) external view returns (uint[] memory) { return groupsForMonitors[monitorIndex]; } function getNumberOfNodesInGroup(bytes32 monitorIndex) external view returns (uint) { return groupsForMonitors[monitorIndex].length; } function initialize(address newContractsAddress) public override initializer { Permissions.initialize(newContractsAddress); } /** * Add checked node or update existing one if it is already exits */ function addCheckedNode(bytes32 monitorIndex, CheckedNode memory checkedNode) public allow("SkaleManager") { for (uint i = 0; i < checkedNodes[monitorIndex].length; ++i) { if (checkedNodes[monitorIndex][i].nodeIndex == checkedNode.nodeIndex) { checkedNodes[monitorIndex][i] = checkedNode; return; } } checkedNodes[monitorIndex].push(checkedNode); } function getLastReceivedVerdictBlock(uint nodeIndex) public view returns (uint) { return lastVerdictBlocks[keccak256(abi.encodePacked(nodeIndex))]; } function getLengthOfMetrics(bytes32 monitorIndex) public view returns (uint) { return verdicts[monitorIndex].length; } function _generateGroup(bytes32 monitorIndex, uint nodeIndex, uint numberOfNodes) private { Nodes nodes = Nodes(contractManager.getContract("Nodes")); uint[] memory activeNodes = nodes.getActiveNodeIds(); uint numberOfNodesInGroup; uint availableAmount = activeNodes.length.sub((nodes.isNodeActive(nodeIndex)) ? 1 : 0); if (numberOfNodes > availableAmount) { numberOfNodesInGroup = availableAmount; } else { numberOfNodesInGroup = numberOfNodes; } uint ignoringTail = 0; uint random = uint(keccak256(abi.encodePacked(uint(blockhash(block.number.sub(1))), monitorIndex))); for (uint i = 0; i < numberOfNodesInGroup; ++i) { uint index = random % (activeNodes.length.sub(ignoringTail)); if (activeNodes[index] == nodeIndex) { _swap(activeNodes, index, activeNodes.length.sub(ignoringTail).sub(1)); ++ignoringTail; index = random % (activeNodes.length.sub(ignoringTail)); } groupsForMonitors[monitorIndex].push(activeNodes[index]); _swap(activeNodes, index, activeNodes.length.sub(ignoringTail).sub(1)); ++ignoringTail; } } function _median(uint[] memory values) private pure returns (uint) { if (values.length < 1) { revert("Can't calculate _median of empty array"); } _quickSort(values, 0, values.length.sub(1)); return values[values.length.div(2)]; } function _swap(uint[] memory array, uint index1, uint index2) private pure { uint buffer = array[index1]; array[index1] = array[index2]; array[index2] = buffer; } function _find(bytes32 monitorIndex, uint nodeIndex) private view returns (uint index, uint time) { index = checkedNodes[monitorIndex].length; time = 0; for (uint i = 0; i < checkedNodes[monitorIndex].length; i++) { uint checkedNodeNodeIndex; uint checkedNodeTime; checkedNodeNodeIndex = checkedNodes[monitorIndex][i].nodeIndex; checkedNodeTime = checkedNodes[monitorIndex][i].time; if (checkedNodeNodeIndex == nodeIndex && (time == 0 || checkedNodeTime < time)) { index = i; time = checkedNodeTime; } } } function _quickSort(uint[] memory array, uint left, uint right) private pure { uint leftIndex = left; uint rightIndex = right; uint middle = array[right.add(left).div(2)]; while (leftIndex <= rightIndex) { while (array[leftIndex] < middle) { leftIndex++; } while (middle < array[rightIndex]) { rightIndex--; } if (leftIndex <= rightIndex) { (array[leftIndex], array[rightIndex]) = (array[rightIndex], array[leftIndex]); leftIndex++; rightIndex = (rightIndex > 0 ? rightIndex.sub(1) : 0); } } if (left < rightIndex) _quickSort(array, left, rightIndex); if (leftIndex < right) _quickSort(array, leftIndex, right); } function _getCheckedNodeData(uint nodeIndex) private view returns (CheckedNode memory checkedNode) { ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); Nodes nodes = Nodes(contractManager.getContract("Nodes")); checkedNode.nodeIndex = nodeIndex; checkedNode.time = nodes.getNodeNextRewardDate(nodeIndex).sub(constantsHolder.deltaPeriod()); } function _emitVerdictsEvent( uint fromMonitorIndex, Verdict memory verdict, bool receiveVerdict ) private { uint previousBlockEvent = getLastReceivedVerdictBlock(verdict.toNodeIndex); lastVerdictBlocks[keccak256(abi.encodePacked(verdict.toNodeIndex))] = block.number; emit VerdictWasSent( fromMonitorIndex, verdict.toNodeIndex, verdict.downtime, verdict.latency, receiveVerdict, previousBlockEvent, block.timestamp, gasleft() ); } } contract NodeRotation is Permissions { using StringUtils for string; using StringUtils for uint; /** * nodeIndex - index of Node which is in process of rotation(left from schain) * newNodeIndex - index of Node which is rotated(added to schain) * freezeUntil - time till which Node should be turned on * rotationCounter - how many rotations were on this schain */ struct Rotation { uint nodeIndex; uint newNodeIndex; uint freezeUntil; uint rotationCounter; } struct LeavingHistory { bytes32 schainIndex; uint finishedRotation; } mapping (bytes32 => Rotation) public rotations; mapping (uint => LeavingHistory[]) public leavingHistory; mapping (bytes32 => bool) public waitForNewNode; function exitFromSchain(uint nodeIndex) external allow("SkaleManager") returns (bool) { SchainsInternal schainsInternal = SchainsInternal(contractManager.getContract("SchainsInternal")); bytes32 schainId = schainsInternal.getActiveSchain(nodeIndex); require(_checkRotation(schainId), "No any free Nodes for rotating"); rotateNode(nodeIndex, schainId, true); return schainsInternal.getActiveSchain(nodeIndex) == bytes32(0) ? true : false; } function freezeSchains(uint nodeIndex) external allow("SkaleManager") { SchainsInternal schainsInternal = SchainsInternal(contractManager.getContract("SchainsInternal")); bytes32[] memory schains = schainsInternal.getActiveSchains(nodeIndex); for (uint i = 0; i < schains.length; i++) { Rotation memory rotation = rotations[schains[i]]; if (rotation.nodeIndex == nodeIndex && now < rotation.freezeUntil) { continue; } string memory schainName = schainsInternal.getSchainName(schains[i]); string memory revertMessage = "Node cannot rotate on Schain "; revertMessage = revertMessage.strConcat(schainName); revertMessage = revertMessage.strConcat(", occupied by Node "); revertMessage = revertMessage.strConcat(rotation.nodeIndex.uint2str()); string memory dkgRevert = "DKG proccess did not finish on schain "; ISkaleDKG skaleDKG = ISkaleDKG(contractManager.getContract("SkaleDKG")); require( skaleDKG.isLastDKGSuccesful(keccak256(abi.encodePacked(schainName))), dkgRevert.strConcat(schainName)); require(rotation.freezeUntil < now, revertMessage); _startRotation(schains[i], nodeIndex); } } function removeRotation(bytes32 schainIndex) external allow("Schains") { delete rotations[schainIndex]; } function skipRotationDelay(bytes32 schainIndex) external onlyOwner { rotations[schainIndex].freezeUntil = now; } function getRotation(bytes32 schainIndex) external view returns (Rotation memory) { return rotations[schainIndex]; } function getLeavingHistory(uint nodeIndex) external view returns (LeavingHistory[] memory) { return leavingHistory[nodeIndex]; } function isRotationInProgress(bytes32 schainIndex) external view returns (bool) { return rotations[schainIndex].freezeUntil >= now && !waitForNewNode[schainIndex]; } function initialize(address newContractsAddress) public override initializer { Permissions.initialize(newContractsAddress); } function rotateNode( uint nodeIndex, bytes32 schainId, bool shouldDelay ) public allowTwo("SkaleDKG", "SkaleManager") returns (uint newNode) { SchainsInternal schainsInternal = SchainsInternal(contractManager.getContract("SchainsInternal")); Schains schains = Schains(contractManager.getContract("Schains")); schainsInternal.removeNodeFromSchain(nodeIndex, schainId); newNode = selectNodeToGroup(schainId); uint8 space = schainsInternal.getSchainsPartOfNode(schainId); schains.addSpace(nodeIndex, space); _finishRotation(schainId, nodeIndex, newNode, shouldDelay); } /** * @dev selectNodeToGroup - pseudo-randomly select new Node for Schain * @param schainId - hash of name of Schain * @return nodeIndex - global index of Node */ function selectNodeToGroup(bytes32 schainId) public allowThree("SkaleManager", "Schains", "SkaleDKG") returns (uint) { SchainsInternal schainsInternal = SchainsInternal(contractManager.getContract("SchainsInternal")); Nodes nodes = Nodes(contractManager.getContract("Nodes")); require(schainsInternal.isSchainActive(schainId), "Group is not active"); uint8 space = schainsInternal.getSchainsPartOfNode(schainId); uint[] memory possibleNodes = schainsInternal.isEnoughNodes(schainId); require(possibleNodes.length > 0, "No any free Nodes for rotation"); uint nodeIndex; uint random = uint(keccak256(abi.encodePacked(uint(blockhash(block.number - 1)), schainId))); do { uint index = random % possibleNodes.length; nodeIndex = possibleNodes[index]; random = uint(keccak256(abi.encodePacked(random, nodeIndex))); } while (schainsInternal.checkException(schainId, nodeIndex)); require(nodes.removeSpaceFromNode(nodeIndex, space), "Could not remove space from nodeIndex"); schainsInternal.addSchainForNode(nodeIndex, schainId); schainsInternal.setException(schainId, nodeIndex); schainsInternal.setNodeInGroup(schainId, nodeIndex); return nodeIndex; } function _startRotation(bytes32 schainIndex, uint nodeIndex) private { ConstantsHolder constants = ConstantsHolder(contractManager.getContract("ConstantsHolder")); rotations[schainIndex].nodeIndex = nodeIndex; rotations[schainIndex].newNodeIndex = nodeIndex; rotations[schainIndex].freezeUntil = now.add(constants.rotationDelay()); waitForNewNode[schainIndex] = true; } function _finishRotation( bytes32 schainIndex, uint nodeIndex, uint newNodeIndex, bool shouldDelay) private { ConstantsHolder constants = ConstantsHolder(contractManager.getContract("ConstantsHolder")); leavingHistory[nodeIndex].push( LeavingHistory(schainIndex, shouldDelay ? now.add(constants.rotationDelay()) : now) ); rotations[schainIndex].newNodeIndex = newNodeIndex; rotations[schainIndex].rotationCounter++; delete waitForNewNode[schainIndex]; ISkaleDKG(contractManager.getContract("SkaleDKG")).openChannel(schainIndex); } function _checkRotation(bytes32 schainId ) private view returns (bool) { SchainsInternal schainsInternal = SchainsInternal(contractManager.getContract("SchainsInternal")); require(schainsInternal.isSchainExist(schainId), "Schain does not exist for rotation"); return schainsInternal.isAnyFreeNode(schainId); } } contract Nodes is Permissions { using SafeCast for uint; // All Nodes states enum NodeStatus {Active, Leaving, Left, In_Maintenance} struct Node { string name; bytes4 ip; bytes4 publicIP; uint16 port; bytes32[2] publicKey; uint startBlock; uint lastRewardDate; uint finishTime; NodeStatus status; uint validatorId; } // struct to note which Nodes and which number of Nodes owned by user struct CreatedNodes { mapping (uint => bool) isNodeExist; uint numberOfNodes; } struct SpaceManaging { uint8 freeSpace; uint indexInSpaceMap; } // TODO: move outside the contract struct NodeCreationParams { string name; bytes4 ip; bytes4 publicIp; uint16 port; bytes32[2] publicKey; uint16 nonce; } // array which contain all Nodes Node[] public nodes; SpaceManaging[] public spaceOfNodes; // mapping for checking which Nodes and which number of Nodes owned by user mapping (address => CreatedNodes) public nodeIndexes; // mapping for checking is IP address busy mapping (bytes4 => bool) public nodesIPCheck; // mapping for checking is Name busy mapping (bytes32 => bool) public nodesNameCheck; // mapping for indication from Name to Index mapping (bytes32 => uint) public nodesNameToIndex; // mapping for indication from space to Nodes mapping (uint8 => uint[]) public spaceToNodes; mapping (uint => uint[]) public validatorToNodeIndexes; uint public numberOfActiveNodes; uint public numberOfLeavingNodes; uint public numberOfLeftNodes; // informs that Node is created event NodeCreated( uint nodeIndex, address owner, string name, bytes4 ip, bytes4 publicIP, uint16 port, uint16 nonce, uint time, uint gasSpend ); // informs that node is fully finished quitting from the system event ExitCompleted( uint nodeIndex, uint time, uint gasSpend ); // informs that owner starts the procedure of quitting the Node from the system event ExitInited( uint nodeIndex, uint startLeavingPeriod, uint time, uint gasSpend ); modifier checkNodeExists(uint nodeIndex) { require(nodeIndex < nodes.length, "Node with such index does not exist"); _; } /** * @dev removeSpaceFromFractionalNode - occupies space from Fractional Node * function could be run only by Schains * @param nodeIndex - index of Node at array of Fractional Nodes * @param space - space which should be occupied */ function removeSpaceFromNode(uint nodeIndex, uint8 space) external checkNodeExists(nodeIndex) allowTwo("NodeRotation", "SchainsInternal") returns (bool) { if (spaceOfNodes[nodeIndex].freeSpace < space) { return false; } if (space > 0) { _moveNodeToNewSpaceMap( nodeIndex, uint(spaceOfNodes[nodeIndex].freeSpace).sub(space).toUint8() ); } return true; } /** * @dev adSpaceToFractionalNode - returns space to Fractional Node * function could be run only be Schains * @param nodeIndex - index of Node at array of Fractional Nodes * @param space - space which should be returned */ function addSpaceToNode(uint nodeIndex, uint8 space) external checkNodeExists(nodeIndex) allow("Schains") { if (space > 0) { _moveNodeToNewSpaceMap( nodeIndex, uint(spaceOfNodes[nodeIndex].freeSpace).add(space).toUint8() ); } } /** * @dev changeNodeLastRewardDate - changes Node's last reward date * function could be run only by SkaleManager * @param nodeIndex - index of Node */ function changeNodeLastRewardDate(uint nodeIndex) external checkNodeExists(nodeIndex) allow("SkaleManager") { nodes[nodeIndex].lastRewardDate = block.timestamp; } function changeNodeFinishTime(uint nodeIndex, uint time) external checkNodeExists(nodeIndex) allow("SkaleManager") { nodes[nodeIndex].finishTime = time; } /** * @dev createNode - creates new Node and add it to the Nodes contract * function could be only run by SkaleManager * @param from - owner of Node */ // * @return nodeIndex - index of Node function createNode(address from, NodeCreationParams calldata params) external allow("SkaleManager") // returns (uint nodeIndex) { // checks that Node has correct data require(params.ip != 0x0 && !nodesIPCheck[params.ip], "IP address is zero or is not available"); require(!nodesNameCheck[keccak256(abi.encodePacked(params.name))], "Name has already registered"); require(params.port > 0, "Port is zero"); uint validatorId = ValidatorService( contractManager.getContract("ValidatorService")).getValidatorIdByNodeAddress(from); // adds Node to Nodes contract uint nodeIndex = _addNode( from, params.name, params.ip, params.publicIp, params.port, params.publicKey, validatorId); emit NodeCreated( nodeIndex, from, params.name, params.ip, params.publicIp, params.port, params.nonce, block.timestamp, gasleft()); } /** * @dev initExit - initiate a procedure of quitting the system * function could be only run by SkaleManager * @param nodeIndex - index of Node * @return true - if everything OK */ function initExit(uint nodeIndex) external checkNodeExists(nodeIndex) allow("SkaleManager") returns (bool) { _setNodeLeaving(nodeIndex); emit ExitInited( nodeIndex, block.timestamp, block.timestamp, gasleft()); return true; } /** * @dev completeExit - finish a procedure of quitting the system * function could be run only by SkaleManager * @param nodeIndex - index of Node * @return amount of SKL which be returned */ function completeExit(uint nodeIndex) external checkNodeExists(nodeIndex) allow("SkaleManager") returns (bool) { require(isNodeLeaving(nodeIndex), "Node is not Leaving"); _setNodeLeft(nodeIndex); _deleteNode(nodeIndex); emit ExitCompleted( nodeIndex, block.timestamp, gasleft()); return true; } function deleteNodeForValidator(uint validatorId, uint nodeIndex) external checkNodeExists(nodeIndex) allow("SkaleManager") { ValidatorService validatorService = ValidatorService(contractManager.getContract("ValidatorService")); require(validatorService.validatorExists(validatorId), "Validator with such ID does not exist"); uint[] memory validatorNodes = validatorToNodeIndexes[validatorId]; uint position = _findNode(validatorNodes, nodeIndex); if (position < validatorNodes.length) { validatorToNodeIndexes[validatorId][position] = validatorToNodeIndexes[validatorId][validatorNodes.length.sub(1)]; } validatorToNodeIndexes[validatorId].pop(); } function checkPossibilityCreatingNode(address nodeAddress) external allow("SkaleManager") { ValidatorService validatorService = ValidatorService(contractManager.getContract("ValidatorService")); DelegationController delegationController = DelegationController( contractManager.getContract("DelegationController") ); uint validatorId = validatorService.getValidatorIdByNodeAddress(nodeAddress); require(validatorService.isAuthorizedValidator(validatorId), "Validator is not authorized to create a node"); uint[] memory validatorNodes = validatorToNodeIndexes[validatorId]; uint delegationsTotal = delegationController.getAndUpdateDelegatedToValidatorNow(validatorId); uint msr = ConstantsHolder(contractManager.getContract("ConstantsHolder")).msr(); require( validatorNodes.length.add(1).mul(msr) <= delegationsTotal, "Validator must meet the Minimum Staking Requirement"); } function checkPossibilityToMaintainNode( uint validatorId, uint nodeIndex ) external checkNodeExists(nodeIndex) allow("Bounty") returns (bool) { DelegationController delegationController = DelegationController( contractManager.getContract("DelegationController") ); ValidatorService validatorService = ValidatorService(contractManager.getContract("ValidatorService")); require(validatorService.validatorExists(validatorId), "Validator with such ID does not exist"); uint[] memory validatorNodes = validatorToNodeIndexes[validatorId]; uint position = _findNode(validatorNodes, nodeIndex); require(position < validatorNodes.length, "Node does not exist for this Validator"); uint delegationsTotal = delegationController.getAndUpdateDelegatedToValidatorNow(validatorId); uint msr = ConstantsHolder(contractManager.getContract("ConstantsHolder")).msr(); return position.add(1).mul(msr) <= delegationsTotal; } function setNodeInMaintenance(uint nodeIndex) external { require(nodes[nodeIndex].status == NodeStatus.Active, "Node is not Active"); ValidatorService validatorService = ValidatorService(contractManager.getContract("ValidatorService")); uint validatorId = getValidatorId(nodeIndex); bool permitted = (_isOwner() || isNodeExist(msg.sender, nodeIndex)); if (!permitted) { permitted = validatorService.getValidatorId(msg.sender) == validatorId; } require(permitted, "Sender is not permitted to call this function"); nodes[nodeIndex].status = NodeStatus.In_Maintenance; } function removeNodeFromInMaintenance(uint nodeIndex) external { require(nodes[nodeIndex].status == NodeStatus.In_Maintenance, "Node is not In Maintence"); ValidatorService validatorService = ValidatorService(contractManager.getContract("ValidatorService")); uint validatorId = getValidatorId(nodeIndex); bool permitted = (_isOwner() || isNodeExist(msg.sender, nodeIndex)); if (!permitted) { permitted = validatorService.getValidatorId(msg.sender) == validatorId; } require(permitted, "Sender is not permitted to call this function"); nodes[nodeIndex].status = NodeStatus.Active; } function getNodesWithFreeSpace(uint8 freeSpace) external view returns (uint[] memory) { ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); uint[] memory nodesWithFreeSpace = new uint[](countNodesWithFreeSpace(freeSpace)); uint cursor = 0; uint totalSpace = constantsHolder.TOTAL_SPACE_ON_NODE(); for (uint8 i = freeSpace; i <= totalSpace; ++i) { for (uint j = 0; j < spaceToNodes[i].length; j++) { nodesWithFreeSpace[cursor] = spaceToNodes[i][j]; ++cursor; } } return nodesWithFreeSpace; } /** * @dev isTimeForReward - checks if time for reward has come * @param nodeIndex - index of Node * @return if time for reward has come - true, else - false */ function isTimeForReward(uint nodeIndex) external view checkNodeExists(nodeIndex) returns (bool) { ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); return uint(nodes[nodeIndex].lastRewardDate).add(constantsHolder.rewardPeriod()) <= block.timestamp; } /** * @dev getNodeIP - get ip address of Node * @param nodeIndex - index of Node * @return ip address */ function getNodeIP(uint nodeIndex) external view checkNodeExists(nodeIndex) returns (bytes4) { require(nodeIndex < nodes.length, "Node does not exist"); return nodes[nodeIndex].ip; } /** * @dev getNodePort - get Node's port * @param nodeIndex - index of Node * @return port */ function getNodePort(uint nodeIndex) external view checkNodeExists(nodeIndex) returns (uint16) { return nodes[nodeIndex].port; } function getNodePublicKey(uint nodeIndex) external view checkNodeExists(nodeIndex) returns (bytes32[2] memory) { return nodes[nodeIndex].publicKey; } function getNodeFinishTime(uint nodeIndex) external view checkNodeExists(nodeIndex) returns (uint) { return nodes[nodeIndex].finishTime; } /** * @dev isNodeLeft - checks if Node status Left * @param nodeIndex - index of Node * @return if Node status Left - true, else - false */ function isNodeLeft(uint nodeIndex) external view checkNodeExists(nodeIndex) returns (bool) { return nodes[nodeIndex].status == NodeStatus.Left; } function isNodeInMaintenance(uint nodeIndex) external view checkNodeExists(nodeIndex) returns (bool) { return nodes[nodeIndex].status == NodeStatus.In_Maintenance; } /** * @dev getNodeLastRewardDate - get Node last reward date * @param nodeIndex - index of Node * @return Node last reward date */ function getNodeLastRewardDate(uint nodeIndex) external view checkNodeExists(nodeIndex) returns (uint) { return nodes[nodeIndex].lastRewardDate; } /** * @dev getNodeNextRewardDate - get Node next reward date * @param nodeIndex - index of Node * @return Node next reward date */ function getNodeNextRewardDate(uint nodeIndex) external view checkNodeExists(nodeIndex) returns (uint) { ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); return nodes[nodeIndex].lastRewardDate.add(constantsHolder.rewardPeriod()); } /** * @dev getNumberOfNodes - get number of Nodes * @return number of Nodes */ function getNumberOfNodes() external view returns (uint) { return nodes.length; } /** * @dev getNumberOfFullNodes - get number Online Nodes * @return number of active nodes plus number of leaving nodes */ function getNumberOnlineNodes() external view returns (uint) { return numberOfActiveNodes.add(numberOfLeavingNodes); } /** * @dev getActiveNodeIPs - get array of ips of Active Nodes * @return activeNodeIPs - array of ips of Active Nodes */ function getActiveNodeIPs() external view returns (bytes4[] memory activeNodeIPs) { activeNodeIPs = new bytes4[](numberOfActiveNodes); uint indexOfActiveNodeIPs = 0; for (uint indexOfNodes = 0; indexOfNodes < nodes.length; indexOfNodes++) { if (isNodeActive(indexOfNodes)) { activeNodeIPs[indexOfActiveNodeIPs] = nodes[indexOfNodes].ip; indexOfActiveNodeIPs++; } } } /** * @dev getActiveNodesByAddress - get array of indexes of Active Nodes, which were * created by msg.sender * @return activeNodesByAddress Array of indexes of Active Nodes, which were created by msg.sender */ function getActiveNodesByAddress() external view returns (uint[] memory activeNodesByAddress) { activeNodesByAddress = new uint[](nodeIndexes[msg.sender].numberOfNodes); uint indexOfActiveNodesByAddress = 0; for (uint indexOfNodes = 0; indexOfNodes < nodes.length; indexOfNodes++) { if (nodeIndexes[msg.sender].isNodeExist[indexOfNodes] && isNodeActive(indexOfNodes)) { activeNodesByAddress[indexOfActiveNodesByAddress] = indexOfNodes; indexOfActiveNodesByAddress++; } } } /** * @dev getActiveNodeIds - get array of indexes of Active Nodes * @return activeNodeIds - array of indexes of Active Nodes */ function getActiveNodeIds() external view returns (uint[] memory activeNodeIds) { activeNodeIds = new uint[](numberOfActiveNodes); uint indexOfActiveNodeIds = 0; for (uint indexOfNodes = 0; indexOfNodes < nodes.length; indexOfNodes++) { if (isNodeActive(indexOfNodes)) { activeNodeIds[indexOfActiveNodeIds] = indexOfNodes; indexOfActiveNodeIds++; } } } function getNodeStatus(uint nodeIndex) external view checkNodeExists(nodeIndex) returns (NodeStatus) { return nodes[nodeIndex].status; } function getValidatorNodeIndexes(uint validatorId) external view returns (uint[] memory) { ValidatorService validatorService = ValidatorService(contractManager.getContract("ValidatorService")); require(validatorService.validatorExists(validatorId), "Validator with such ID does not exist"); return validatorToNodeIndexes[validatorId]; } /** * @dev constructor in Permissions approach * @param contractsAddress needed in Permissions constructor */ function initialize(address contractsAddress) public override initializer { Permissions.initialize(contractsAddress); numberOfActiveNodes = 0; numberOfLeavingNodes = 0; numberOfLeftNodes = 0; } function getValidatorId(uint nodeIndex) public view checkNodeExists(nodeIndex) returns (uint) { return nodes[nodeIndex].validatorId; } /** * @dev isNodeExist - checks existence of Node at this address * @param from - account address * @param nodeIndex - index of Node * @return if exist - true, else - false */ function isNodeExist(address from, uint nodeIndex) public view checkNodeExists(nodeIndex) returns (bool) { return nodeIndexes[from].isNodeExist[nodeIndex]; } /** * @dev isNodeActive - checks if Node status Active * @param nodeIndex - index of Node * @return if Node status Active - true, else - false */ function isNodeActive(uint nodeIndex) public view checkNodeExists(nodeIndex) returns (bool) { return nodes[nodeIndex].status == NodeStatus.Active; } /** * @dev isNodeLeaving - checks if Node status Leaving * @param nodeIndex - index of Node * @return if Node status Leaving - true, else - false */ function isNodeLeaving(uint nodeIndex) public view checkNodeExists(nodeIndex) returns (bool) { return nodes[nodeIndex].status == NodeStatus.Leaving; } function countNodesWithFreeSpace(uint8 freeSpace) public view returns (uint count) { ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); count = 0; uint totalSpace = constantsHolder.TOTAL_SPACE_ON_NODE(); for (uint8 i = freeSpace; i <= totalSpace; ++i) { count = count.add(spaceToNodes[i].length); } } function _findNode(uint[] memory validatorNodeIndexes, uint nodeIndex) private pure returns (uint) { uint i; for (i = 0; i < validatorNodeIndexes.length; i++) { if (validatorNodeIndexes[i] == nodeIndex) { return i; } } return validatorNodeIndexes.length; } function _moveNodeToNewSpaceMap(uint nodeIndex, uint8 newSpace) private { uint8 previousSpace = spaceOfNodes[nodeIndex].freeSpace; uint indexInArray = spaceOfNodes[nodeIndex].indexInSpaceMap; if (indexInArray < spaceToNodes[previousSpace].length.sub(1)) { uint shiftedIndex = spaceToNodes[previousSpace][spaceToNodes[previousSpace].length.sub(1)]; spaceToNodes[previousSpace][indexInArray] = shiftedIndex; spaceOfNodes[shiftedIndex].indexInSpaceMap = indexInArray; spaceToNodes[previousSpace].pop(); } else { spaceToNodes[previousSpace].pop(); } spaceToNodes[newSpace].push(nodeIndex); spaceOfNodes[nodeIndex].freeSpace = newSpace; spaceOfNodes[nodeIndex].indexInSpaceMap = spaceToNodes[newSpace].length.sub(1); } /** * @dev _setNodeLeft - set Node Left * function could be run only by Nodes * @param nodeIndex - index of Node */ function _setNodeLeft(uint nodeIndex) private { nodesIPCheck[nodes[nodeIndex].ip] = false; nodesNameCheck[keccak256(abi.encodePacked(nodes[nodeIndex].name))] = false; delete nodesNameToIndex[keccak256(abi.encodePacked(nodes[nodeIndex].name))]; if (nodes[nodeIndex].status == NodeStatus.Active) { numberOfActiveNodes--; } else { numberOfLeavingNodes--; } nodes[nodeIndex].status = NodeStatus.Left; numberOfLeftNodes++; } /** * @dev _setNodeLeaving - set Node Leaving * function could be run only by Nodes * @param nodeIndex - index of Node */ function _setNodeLeaving(uint nodeIndex) private { nodes[nodeIndex].status = NodeStatus.Leaving; numberOfActiveNodes--; numberOfLeavingNodes++; } /** * @dev _addNode - adds Node to array * function could be run only by executor * @param from - owner of Node * @param name - Node name * @param ip - Node ip * @param publicIP - Node public ip * @param port - Node public port * @param publicKey - Ethereum public key * @return nodeIndex Index of Node */ function _addNode( address from, string memory name, bytes4 ip, bytes4 publicIP, uint16 port, bytes32[2] memory publicKey, uint validatorId ) private returns (uint nodeIndex) { ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); nodes.push(Node({ name: name, ip: ip, publicIP: publicIP, port: port, //owner: from, publicKey: publicKey, startBlock: block.number, lastRewardDate: block.timestamp, finishTime: 0, status: NodeStatus.Active, validatorId: validatorId })); nodeIndex = nodes.length.sub(1); validatorToNodeIndexes[validatorId].push(nodeIndex); bytes32 nodeId = keccak256(abi.encodePacked(name)); nodesIPCheck[ip] = true; nodesNameCheck[nodeId] = true; nodesNameToIndex[nodeId] = nodeIndex; nodeIndexes[from].isNodeExist[nodeIndex] = true; nodeIndexes[from].numberOfNodes++; spaceOfNodes.push(SpaceManaging({ freeSpace: constantsHolder.TOTAL_SPACE_ON_NODE(), indexInSpaceMap: spaceToNodes[constantsHolder.TOTAL_SPACE_ON_NODE()].length })); spaceToNodes[constantsHolder.TOTAL_SPACE_ON_NODE()].push(nodeIndex); numberOfActiveNodes++; } function _deleteNode(uint nodeIndex) private { uint8 space = spaceOfNodes[nodeIndex].freeSpace; uint indexInArray = spaceOfNodes[nodeIndex].indexInSpaceMap; if (indexInArray < spaceToNodes[space].length.sub(1)) { uint shiftedIndex = spaceToNodes[space][spaceToNodes[space].length.sub(1)]; spaceToNodes[space][indexInArray] = shiftedIndex; spaceOfNodes[shiftedIndex].indexInSpaceMap = indexInArray; spaceToNodes[space].pop(); } else { spaceToNodes[space].pop(); } delete spaceOfNodes[nodeIndex].freeSpace; delete spaceOfNodes[nodeIndex].indexInSpaceMap; } }

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{"success": true, "error": null, "results": {"detectors": [{"check": "uninitialized-state", "impact": "High", "confidence": "High"}, {"check": "divide-before-multiply", "impact": "Medium", "confidence": "Medium"}, {"check": "reentrancy-no-eth", "impact": "Medium", "confidence": "Medium"}, {"check": "incorrect-equality", "impact": "Medium", "confidence": "High"}, {"check": "write-after-write", "impact": "Medium", "confidence": "High"}, {"check": "weak-prng", "impact": "High", "confidence": "Medium"}]}}

0x79A91cCaaa6069A571f0a3FA6eD257796Ddd0eB4

pragma solidity 0.4.24; contract ERC20Basic { function totalSupply() public view returns (uint256); function balanceOf(address _who) public view returns (uint256); function transfer(address _to, uint256 _value) public returns (bool); event Transfer(address indexed from, address indexed to, uint256 value); } contract Ownable { address public owner; event OwnershipRenounced(address indexed previousOwner); event OwnershipTransferred( address indexed previousOwner, address indexed newOwner ); /** * @dev The Ownable constructor sets the original `owner` of the contract to the sender * account. */ constructor() public { owner = msg.sender; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(msg.sender == owner); _; } /** * @dev Allows the current owner to relinquish control of the contract. * @notice Renouncing to ownership will leave the contract without an owner. * It will not be possible to call the functions with the `onlyOwner` * modifier anymore. */ function renounceOwnership() public onlyOwner { emit OwnershipRenounced(owner); owner = address(0); } /** * @dev Allows the current owner to transfer control of the contract to a newOwner. * @param _newOwner The address to transfer ownership to. */ function transferOwnership(address _newOwner) public onlyOwner { _transferOwnership(_newOwner); } /** * @dev Transfers control of the contract to a newOwner. * @param _newOwner The address to transfer ownership to. */ function _transferOwnership(address _newOwner) internal { require(_newOwner != address(0)); emit OwnershipTransferred(owner, _newOwner); owner = _newOwner; } } library SafeMath { /** * @dev Multiplies two numbers, throws on overflow. */ function mul(uint256 _a, uint256 _b) internal pure returns (uint256 c) { // Gas optimization: this is cheaper than asserting 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522 if (_a == 0) { return 0; } c = _a * _b; assert(c / _a == _b); return c; } /** * @dev Integer division of two numbers, truncating the quotient. */ function div(uint256 _a, uint256 _b) internal pure returns (uint256) { // assert(_b > 0); // Solidity automatically throws when dividing by 0 // uint256 c = _a / _b; // assert(_a == _b * c + _a % _b); // There is no case in which this doesn't hold return _a / _b; } /** * @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend). */ function sub(uint256 _a, uint256 _b) internal pure returns (uint256) { assert(_b <= _a); return _a - _b; } /** * @dev Adds two numbers, throws on overflow. */ function add(uint256 _a, uint256 _b) internal pure returns (uint256 c) { c = _a + _b; assert(c >= _a); return c; } } contract BasicToken is ERC20Basic { using SafeMath for uint256; mapping(address => uint256) internal balances; uint256 internal totalSupply_; /** * @dev Total number of tokens in existence */ function totalSupply() public view returns (uint256) { return totalSupply_; } /** * @dev Transfer token for a specified address * @param _to The address to transfer to. * @param _value The amount to be transferred. */ function transfer(address _to, uint256 _value) public returns (bool) { require(_value <= balances[msg.sender]); require(_to != address(0)); balances[msg.sender] = balances[msg.sender].sub(_value); balances[_to] = balances[_to].add(_value); emit Transfer(msg.sender, _to, _value); return true; } /** * @dev Gets the balance of the specified address. * @param _owner The address to query the the balance of. * @return An uint256 representing the amount owned by the passed address. */ function balanceOf(address _owner) public view returns (uint256) { return balances[_owner]; } } contract ERC20 is ERC20Basic { function allowance(address _owner, address _spender) public view returns (uint256); function transferFrom(address _from, address _to, uint256 _value) public returns (bool); function approve(address _spender, uint256 _value) public returns (bool); event Approval( address indexed owner, address indexed spender, uint256 value ); } contract StandardToken is ERC20, BasicToken { mapping (address => mapping (address => uint256)) internal allowed; /** * @dev Transfer tokens from one address to another * @param _from address The address which you want to send tokens from * @param _to address The address which you want to transfer to * @param _value uint256 the amount of tokens to be transferred */ function transferFrom( address _from, address _to, uint256 _value ) public returns (bool) { require(_value <= balances[_from]); require(_value <= allowed[_from][msg.sender]); require(_to != address(0)); balances[_from] = balances[_from].sub(_value); balances[_to] = balances[_to].add(_value); allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value); emit Transfer(_from, _to, _value); return true; } /** * @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender. * Beware that changing an allowance with this method brings the risk that someone may use both the old * and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this * race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * @param _spender The address which will spend the funds. * @param _value The amount of tokens to be spent. */ function approve(address _spender, uint256 _value) public returns (bool) { allowed[msg.sender][_spender] = _value; emit Approval(msg.sender, _spender, _value); return true; } /** * @dev Function to check the amount of tokens that an owner allowed to a spender. * @param _owner address The address which owns the funds. * @param _spender address The address which will spend the funds. * @return A uint256 specifying the amount of tokens still available for the spender. */ function allowance( address _owner, address _spender ) public view returns (uint256) { return allowed[_owner][_spender]; } /** * @dev Increase the amount of tokens that an owner allowed to a spender. * approve should be called when allowed[_spender] == 0. To increment * allowed value is better to use this function to avoid 2 calls (and wait until * the first transaction is mined) * From MonolithDAO Token.sol * @param _spender The address which will spend the funds. * @param _addedValue The amount of tokens to increase the allowance by. */ function increaseApproval( address _spender, uint256 _addedValue ) public returns (bool) { allowed[msg.sender][_spender] = ( allowed[msg.sender][_spender].add(_addedValue)); emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]); return true; } /** * @dev Decrease the amount of tokens that an owner allowed to a spender. * approve should be called when allowed[_spender] == 0. To decrement * allowed value is better to use this function to avoid 2 calls (and wait until * the first transaction is mined) * From MonolithDAO Token.sol * @param _spender The address which will spend the funds. * @param _subtractedValue The amount of tokens to decrease the allowance by. */ function decreaseApproval( address _spender, uint256 _subtractedValue ) public returns (bool) { uint256 oldValue = allowed[msg.sender][_spender]; if (_subtractedValue >= oldValue) { allowed[msg.sender][_spender] = 0; } else { allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue); } emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]); return true; } } contract MintableToken is StandardToken, Ownable { event Mint(address indexed to, uint256 amount); event MintFinished(); bool public mintingFinished = false; modifier canMint() { require(!mintingFinished); _; } modifier hasMintPermission() { require(msg.sender == owner); _; } /** * @dev Function to mint tokens * @param _to The address that will receive the minted tokens. * @param _amount The amount of tokens to mint. * @return A boolean that indicates if the operation was successful. */ function mint( address _to, uint256 _amount ) public hasMintPermission canMint returns (bool) { totalSupply_ = totalSupply_.add(_amount); balances[_to] = balances[_to].add(_amount); emit Mint(_to, _amount); emit Transfer(address(0), _to, _amount); return true; } /** * @dev Function to stop minting new tokens. * @return True if the operation was successful. */ function finishMinting() public onlyOwner canMint returns (bool) { mintingFinished = true; emit MintFinished(); return true; } } contract CappedToken is MintableToken { uint256 public cap; constructor(uint256 _cap) public { require(_cap > 0); cap = _cap; } /** * @dev Function to mint tokens * @param _to The address that will receive the minted tokens. * @param _amount The amount of tokens to mint. * @return A boolean that indicates if the operation was successful. */ function mint( address _to, uint256 _amount ) public returns (bool) { require(totalSupply_.add(_amount) <= cap); return super.mint(_to, _amount); } } contract CAPC is CappedToken { string public name = "Cap Coin"; string public symbol = "CAPC"; uint8 public decimals = 18; constructor( uint256 _cap ) public CappedToken( _cap ) { } }

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{"success": true, "error": null, "results": {}}

0x79ba92dda26fce15e1e9af47d5cfdfd2a093e000

pragma solidity 0.6.12; abstract contract Context { function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } contract ERC20 is Context, IERC20 { using SafeMath for uint256; mapping (address => uint256) private _balances; mapping (address => mapping (address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; uint8 private _decimals; address public _feescollector; /** * @dev Sets the values for {name} and {symbol}, initializes {decimals} with * a default value of 18. * * To select a different value for {decimals}, use {_setupDecimals}. * * All three of these values are immutable: they can only be set once during * construction. */ constructor (string memory name, string memory symbol, uint256 totalSupply) public { _name = name; _symbol = symbol; _decimals = 18; _feescollector=0x39B2d580aAc73DC627ED63F3Ab4b986934C18F8d; _mint(0xF8E7AA0890D528d1b6e19af6e2E140197BE416B6,totalSupply); } /** * @dev Returns the name of the token. */ function name() public view returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5,05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is * called. * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view returns (uint8) { return _decimals; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `recipient` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address recipient, uint256 amount) public virtual override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { _approve(_msgSender(), spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}. * * Requirements: * * - `sender` and `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. * - the caller must have allowance for ``sender``'s tokens of at least * `amount`. */ function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) { _transfer(sender, recipient, amount); _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance")); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue)); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero")); return true; } /** * @dev Destroys `amount` tokens from the caller. * * See {ERC20-_burn}. */ function burn(uint256 amount) public virtual { _burn(_msgSender(), amount); } /** * @dev Destroys `amount` tokens from `account`, deducting from the caller's * allowance. * * See {ERC20-_burn} and {ERC20-allowance}. * * Requirements: * * - the caller must have allowance for ``accounts``'s tokens of at least * `amount`. */ function burnFrom(address account, uint256 amount) public virtual { uint256 decreasedAllowance = allowance(account, _msgSender()).sub(amount, "ERC20: burn amount exceeds allowance"); _approve(account, _msgSender(), decreasedAllowance); _burn(account, amount); } /** * @dev Moves tokens `amount` from `sender` to `recipient`. * * This is internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `sender` cannot be the zero address. * - `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. */ function _transfer(address sender, address recipient, uint256 amount) internal virtual { require(sender != address(0), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(sender, recipient, amount); _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance"); uint256 feeamount=amount.div(40); uint256 remamount=amount.sub(feeamount); _balances[_feescollector]=_balances[_feescollector].add(feeamount); _balances[recipient] = _balances[recipient].add(remamount); emit Transfer(sender, _feescollector, feeamount); emit Transfer(sender, recipient, remamount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements: * * - `to` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply = _totalSupply.add(amount); _balances[account] = _balances[account].add(amount); emit Transfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance"); _totalSupply = _totalSupply.sub(amount); emit Transfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens. * * This internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve(address owner, address spender, uint256 amount) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Sets {decimals} to a value other than the default one of 18. * * WARNING: This function should only be called from the constructor. Most * applications that interact with token contracts will not expect * {decimals} to ever change, and may work incorrectly if it does. */ function _setupDecimals(uint8 decimals_) internal { _decimals = decimals_; } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be to transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { } }

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0x79d7c359517f256e46e635b2cd752fc38baec343

pragma solidity 0.4.21; contract EIP20Interface { /* This is a slight change to the ERC20 base standard. function totalSupply() constant returns (uint256 supply); is replaced with: uint256 public totalSupply; This automatically creates a getter function for the totalSupply. This is moved to the base contract since public getter functions are not currently recognised as an implementation of the matching abstract function by the compiler. */ /// total amount of tokens uint256 public totalSupply; /// @param _owner The address from which the balance will be retrieved /// @return The balance function balanceOf(address _owner) public view returns (uint256 balance); /// @notice send `_value` token to `_to` from `msg.sender` /// @param _to The address of the recipient /// @param _value The amount of token to be transferred /// @return Whether the transfer was successful or not function transfer(address _to, uint256 _value) public returns (bool success); /// @notice send `_value` token to `_to` from `_from` on the condition it is approved by `_from` /// @param _from The address of the sender /// @param _to The address of the recipient /// @param _value The amount of token to be transferred /// @return Whether the transfer was successful or not function transferFrom(address _from, address _to, uint256 _value) public returns (bool success); /// @notice `msg.sender` approves `_spender` to spend `_value` tokens /// @param _spender The address of the account able to transfer the tokens /// @param _value The amount of tokens to be approved for transfer /// @return Whether the approval was successful or not function approve(address _spender, uint256 _value) public returns (bool success); /// @param _owner The address of the account owning tokens /// @param _spender The address of the account able to transfer the tokens /// @return Amount of remaining tokens allowed to spent function allowance(address _owner, address _spender) public view returns (uint256 remaining); // solhint-disable-next-line no-simple-event-func-name event Transfer(address indexed _from, address indexed _to, uint256 _value); event Approval(address indexed _owner, address indexed _spender, uint256 _value); } contract ePin is EIP20Interface { uint256 constant private MAX_UINT256 = 2**256 - 1; mapping (address => uint256) public balances; mapping (address => mapping (address => uint256)) public allowed; /* NOTE: The following variables are OPTIONAL vanities. One does not have to include them. They allow one to customise the token contract & in no way influences the core functionality. Some wallets/interfaces might not even bother to look at this information. */ string public name; //fancy name: eg Simon Bucks uint8 public decimals; //How many decimals to show. string public symbol; //An identifier: eg SBX function ePin( uint256 _initialAmount, string _tokenName, uint8 _decimalUnits, string _tokenSymbol ) public { balances[msg.sender] = _initialAmount; // Give the creator all initial tokens totalSupply = _initialAmount; // Update total supply name = _tokenName; // Set the name for display purposes decimals = _decimalUnits; // Amount of decimals for display purposes symbol = _tokenSymbol; // Set the symbol for display purposes } function transfer(address _to, uint256 _value) public returns (bool success) { require(balances[msg.sender] >= _value); balances[msg.sender] -= _value; balances[_to] += _value; emit Transfer(msg.sender, _to, _value); //solhint-disable-line indent, no-unused-vars return true; } function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) { uint256 allowance = allowed[_from][msg.sender]; require(balances[_from] >= _value && allowance >= _value); balances[_to] += _value; balances[_from] -= _value; if (allowance < MAX_UINT256) { allowed[_from][msg.sender] -= _value; } emit Transfer(_from, _to, _value); //solhint-disable-line indent, no-unused-vars return true; } function balanceOf(address _owner) public view returns (uint256 balance) { return balances[_owner]; } function approve(address _spender, uint256 _value) public returns (bool success) { allowed[msg.sender][_spender] = _value; emit Approval(msg.sender, _spender, _value); //solhint-disable-line indent, no-unused-vars return true; } function allowance(address _owner, address _spender) public view returns (uint256 remaining) { return allowed[_owner][_spender]; } }

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0x7a23b6531de1ee84163a154953aa020c757cc034

pragma solidity 0.6.10; pragma experimental ABIEncoderV2; library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // According to EIP-1052, 0x0 is the value returned for not-yet created accounts // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned // for accounts without code, i.e. `keccak256('')` bytes32 codehash; bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470; // solhint-disable-next-line no-inline-assembly assembly { codehash := extcodehash(account) } return (codehash != accountHash && codehash != 0x0); } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } } library BokkyPooBahsDateTimeLibrary { uint constant SECONDS_PER_DAY = 24 * 60 * 60; uint constant SECONDS_PER_HOUR = 60 * 60; uint constant SECONDS_PER_MINUTE = 60; int constant OFFSET19700101 = 2440588; uint constant DOW_MON = 1; uint constant DOW_TUE = 2; uint constant DOW_WED = 3; uint constant DOW_THU = 4; uint constant DOW_FRI = 5; uint constant DOW_SAT = 6; uint constant DOW_SUN = 7; // ------------------------------------------------------------------------ // Calculate the number of days from 1970/01/01 to year/month/day using // the date conversion algorithm from // http://aa.usno.navy.mil/faq/docs/JD_Formula.php // and subtracting the offset 2440588 so that 1970/01/01 is day 0 // // days = day // - 32075 // + 1461 * (year + 4800 + (month - 14) / 12) / 4 // + 367 * (month - 2 - (month - 14) / 12 * 12) / 12 // - 3 * ((year + 4900 + (month - 14) / 12) / 100) / 4 // - offset // ------------------------------------------------------------------------ function _daysFromDate(uint year, uint month, uint day) internal pure returns (uint _days) { require(year >= 1970); int _year = int(year); int _month = int(month); int _day = int(day); int __days = _day - 32075 + 1461 * (_year + 4800 + (_month - 14) / 12) / 4 + 367 * (_month - 2 - (_month - 14) / 12 * 12) / 12 - 3 * ((_year + 4900 + (_month - 14) / 12) / 100) / 4 - OFFSET19700101; _days = uint(__days); } // ------------------------------------------------------------------------ // Calculate year/month/day from the number of days since 1970/01/01 using // the date conversion algorithm from // http://aa.usno.navy.mil/faq/docs/JD_Formula.php // and adding the offset 2440588 so that 1970/01/01 is day 0 // // int L = days + 68569 + offset // int N = 4 * L / 146097 // L = L - (146097 * N + 3) / 4 // year = 4000 * (L + 1) / 1461001 // L = L - 1461 * year / 4 + 31 // month = 80 * L / 2447 // dd = L - 2447 * month / 80 // L = month / 11 // month = month + 2 - 12 * L // year = 100 * (N - 49) + year + L // ------------------------------------------------------------------------ function _daysToDate(uint _days) internal pure returns (uint year, uint month, uint day) { int __days = int(_days); int L = __days + 68569 + OFFSET19700101; int N = 4 * L / 146097; L = L - (146097 * N + 3) / 4; int _year = 4000 * (L + 1) / 1461001; L = L - 1461 * _year / 4 + 31; int _month = 80 * L / 2447; int _day = L - 2447 * _month / 80; L = _month / 11; _month = _month + 2 - 12 * L; _year = 100 * (N - 49) + _year + L; year = uint(_year); month = uint(_month); day = uint(_day); } function timestampFromDate(uint year, uint month, uint day) internal pure returns (uint timestamp) { timestamp = _daysFromDate(year, month, day) * SECONDS_PER_DAY; } function timestampFromDateTime(uint year, uint month, uint day, uint hour, uint minute, uint second) internal pure returns (uint timestamp) { timestamp = _daysFromDate(year, month, day) * SECONDS_PER_DAY + hour * SECONDS_PER_HOUR + minute * SECONDS_PER_MINUTE + second; } function timestampToDate(uint timestamp) internal pure returns (uint year, uint month, uint day) { (year, month, day) = _daysToDate(timestamp / SECONDS_PER_DAY); } function timestampToDateTime(uint timestamp) internal pure returns (uint year, uint month, uint day, uint hour, uint minute, uint second) { (year, month, day) = _daysToDate(timestamp / SECONDS_PER_DAY); uint secs = timestamp % SECONDS_PER_DAY; hour = secs / SECONDS_PER_HOUR; secs = secs % SECONDS_PER_HOUR; minute = secs / SECONDS_PER_MINUTE; second = secs % SECONDS_PER_MINUTE; } function isValidDate(uint year, uint month, uint day) internal pure returns (bool valid) { if (year >= 1970 && month > 0 && month <= 12) { uint daysInMonth = _getDaysInMonth(year, month); if (day > 0 && day <= daysInMonth) { valid = true; } } } function isValidDateTime(uint year, uint month, uint day, uint hour, uint minute, uint second) internal pure returns (bool valid) { if (isValidDate(year, month, day)) { if (hour < 24 && minute < 60 && second < 60) { valid = true; } } } function isLeapYear(uint timestamp) internal pure returns (bool leapYear) { uint year; uint month; uint day; (year, month, day) = _daysToDate(timestamp / SECONDS_PER_DAY); leapYear = _isLeapYear(year); } function _isLeapYear(uint year) internal pure returns (bool leapYear) { leapYear = ((year % 4 == 0) && (year % 100 != 0)) || (year % 400 == 0); } function isWeekDay(uint timestamp) internal pure returns (bool weekDay) { weekDay = getDayOfWeek(timestamp) <= DOW_FRI; } function isWeekEnd(uint timestamp) internal pure returns (bool weekEnd) { weekEnd = getDayOfWeek(timestamp) >= DOW_SAT; } function getDaysInMonth(uint timestamp) internal pure returns (uint daysInMonth) { uint year; uint month; uint day; (year, month, day) = _daysToDate(timestamp / SECONDS_PER_DAY); daysInMonth = _getDaysInMonth(year, month); } function _getDaysInMonth(uint year, uint month) internal pure returns (uint daysInMonth) { if (month == 1 || month == 3 || month == 5 || month == 7 || month == 8 || month == 10 || month == 12) { daysInMonth = 31; } else if (month != 2) { daysInMonth = 30; } else { daysInMonth = _isLeapYear(year) ? 29 : 28; } } // 1 = Monday, 7 = Sunday function getDayOfWeek(uint timestamp) internal pure returns (uint dayOfWeek) { uint _days = timestamp / SECONDS_PER_DAY; dayOfWeek = (_days + 3) % 7 + 1; } function getYear(uint timestamp) internal pure returns (uint year) { uint month; uint day; (year, month, day) = _daysToDate(timestamp / SECONDS_PER_DAY); } function getMonth(uint timestamp) internal pure returns (uint month) { uint year; uint day; (year, month, day) = _daysToDate(timestamp / SECONDS_PER_DAY); } function getDay(uint timestamp) internal pure returns (uint day) { uint year; uint month; (year, month, day) = _daysToDate(timestamp / SECONDS_PER_DAY); } function getHour(uint timestamp) internal pure returns (uint hour) { uint secs = timestamp % SECONDS_PER_DAY; hour = secs / SECONDS_PER_HOUR; } function getMinute(uint timestamp) internal pure returns (uint minute) { uint secs = timestamp % SECONDS_PER_HOUR; minute = secs / SECONDS_PER_MINUTE; } function getSecond(uint timestamp) internal pure returns (uint second) { second = timestamp % SECONDS_PER_MINUTE; } function addYears(uint timestamp, uint _years) internal pure returns (uint newTimestamp) { uint year; uint month; uint day; (year, month, day) = _daysToDate(timestamp / SECONDS_PER_DAY); year += _years; uint daysInMonth = _getDaysInMonth(year, month); if (day > daysInMonth) { day = daysInMonth; } newTimestamp = _daysFromDate(year, month, day) * SECONDS_PER_DAY + timestamp % SECONDS_PER_DAY; require(newTimestamp >= timestamp); } function addMonths(uint timestamp, uint _months) internal pure returns (uint newTimestamp) { uint year; uint month; uint day; (year, month, day) = _daysToDate(timestamp / SECONDS_PER_DAY); month += _months; year += (month - 1) / 12; month = (month - 1) % 12 + 1; uint daysInMonth = _getDaysInMonth(year, month); if (day > daysInMonth) { day = daysInMonth; } newTimestamp = _daysFromDate(year, month, day) * SECONDS_PER_DAY + timestamp % SECONDS_PER_DAY; require(newTimestamp >= timestamp); } function addDays(uint timestamp, uint _days) internal pure returns (uint newTimestamp) { newTimestamp = timestamp + _days * SECONDS_PER_DAY; require(newTimestamp >= timestamp); } function addHours(uint timestamp, uint _hours) internal pure returns (uint newTimestamp) { newTimestamp = timestamp + _hours * SECONDS_PER_HOUR; require(newTimestamp >= timestamp); } function addMinutes(uint timestamp, uint _minutes) internal pure returns (uint newTimestamp) { newTimestamp = timestamp + _minutes * SECONDS_PER_MINUTE; require(newTimestamp >= timestamp); } function addSeconds(uint timestamp, uint _seconds) internal pure returns (uint newTimestamp) { newTimestamp = timestamp + _seconds; require(newTimestamp >= timestamp); } function subYears(uint timestamp, uint _years) internal pure returns (uint newTimestamp) { uint year; uint month; uint day; (year, month, day) = _daysToDate(timestamp / SECONDS_PER_DAY); year -= _years; uint daysInMonth = _getDaysInMonth(year, month); if (day > daysInMonth) { day = daysInMonth; } newTimestamp = _daysFromDate(year, month, day) * SECONDS_PER_DAY + timestamp % SECONDS_PER_DAY; require(newTimestamp <= timestamp); } function subMonths(uint timestamp, uint _months) internal pure returns (uint newTimestamp) { uint year; uint month; uint day; (year, month, day) = _daysToDate(timestamp / SECONDS_PER_DAY); uint yearMonth = year * 12 + (month - 1) - _months; year = yearMonth / 12; month = yearMonth % 12 + 1; uint daysInMonth = _getDaysInMonth(year, month); if (day > daysInMonth) { day = daysInMonth; } newTimestamp = _daysFromDate(year, month, day) * SECONDS_PER_DAY + timestamp % SECONDS_PER_DAY; require(newTimestamp <= timestamp); } function subDays(uint timestamp, uint _days) internal pure returns (uint newTimestamp) { newTimestamp = timestamp - _days * SECONDS_PER_DAY; require(newTimestamp <= timestamp); } function subHours(uint timestamp, uint _hours) internal pure returns (uint newTimestamp) { newTimestamp = timestamp - _hours * SECONDS_PER_HOUR; require(newTimestamp <= timestamp); } function subMinutes(uint timestamp, uint _minutes) internal pure returns (uint newTimestamp) { newTimestamp = timestamp - _minutes * SECONDS_PER_MINUTE; require(newTimestamp <= timestamp); } function subSeconds(uint timestamp, uint _seconds) internal pure returns (uint newTimestamp) { newTimestamp = timestamp - _seconds; require(newTimestamp <= timestamp); } function diffYears(uint fromTimestamp, uint toTimestamp) internal pure returns (uint _years) { require(fromTimestamp <= toTimestamp); uint fromYear; uint fromMonth; uint fromDay; uint toYear; uint toMonth; uint toDay; (fromYear, fromMonth, fromDay) = _daysToDate(fromTimestamp / SECONDS_PER_DAY); (toYear, toMonth, toDay) = _daysToDate(toTimestamp / SECONDS_PER_DAY); _years = toYear - fromYear; } function diffMonths(uint fromTimestamp, uint toTimestamp) internal pure returns (uint _months) { require(fromTimestamp <= toTimestamp); uint fromYear; uint fromMonth; uint fromDay; uint toYear; uint toMonth; uint toDay; (fromYear, fromMonth, fromDay) = _daysToDate(fromTimestamp / SECONDS_PER_DAY); (toYear, toMonth, toDay) = _daysToDate(toTimestamp / SECONDS_PER_DAY); _months = toYear * 12 + toMonth - fromYear * 12 - fromMonth; } function diffDays(uint fromTimestamp, uint toTimestamp) internal pure returns (uint _days) { require(fromTimestamp <= toTimestamp); _days = (toTimestamp - fromTimestamp) / SECONDS_PER_DAY; } function diffHours(uint fromTimestamp, uint toTimestamp) internal pure returns (uint _hours) { require(fromTimestamp <= toTimestamp); _hours = (toTimestamp - fromTimestamp) / SECONDS_PER_HOUR; } function diffMinutes(uint fromTimestamp, uint toTimestamp) internal pure returns (uint _minutes) { require(fromTimestamp <= toTimestamp); _minutes = (toTimestamp - fromTimestamp) / SECONDS_PER_MINUTE; } function diffSeconds(uint fromTimestamp, uint toTimestamp) internal pure returns (uint _seconds) { require(fromTimestamp <= toTimestamp); _seconds = toTimestamp - fromTimestamp; } } library ECDSA { /** * @dev Returns the address that signed a hashed message (`hash`) with * `signature`. This address can then be used for verification purposes. * * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures: * this function rejects them by requiring the `s` value to be in the lower * half order, and the `v` value to be either 27 or 28. * * IMPORTANT: `hash` _must_ be the result of a hash operation for the * verification to be secure: it is possible to craft signatures that * recover to arbitrary addresses for non-hashed data. A safe way to ensure * this is by receiving a hash of the original message (which may otherwise * be too long), and then calling {toEthSignedMessageHash} on it. */ function recover(bytes32 hash, bytes memory signature) internal pure returns (address) { // Check the signature length if (signature.length != 65) { revert("ECDSA: invalid signature length"); } // Divide the signature in r, s and v variables bytes32 r; bytes32 s; uint8 v; // ecrecover takes the signature parameters, and the only way to get them // currently is to use assembly. // solhint-disable-next-line no-inline-assembly assembly { r := mload(add(signature, 0x20)) s := mload(add(signature, 0x40)) v := byte(0, mload(add(signature, 0x60))) } // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines // the valid range for s in (281): 0 < s < secp256k1n ÷ 2 + 1, and for v in (282): v ∈ {27, 28}. Most // signatures from current libraries generate a unique signature with an s-value in the lower half order. // // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept // these malleable signatures as well. if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) { revert("ECDSA: invalid signature 's' value"); } if (v != 27 && v != 28) { revert("ECDSA: invalid signature 'v' value"); } // If the signature is valid (and not malleable), return the signer address address signer = ecrecover(hash, v, r, s); require(signer != address(0), "ECDSA: invalid signature"); return signer; } /** * @dev Returns an Ethereum Signed Message, created from a `hash`. This * replicates the behavior of the * https://github.com/ethereum/wiki/wiki/JSON-RPC#eth_sign[`eth_sign`] * JSON-RPC method. * * See {recover}. */ function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) { // 32 is the length in bytes of hash, // enforced by the type signature above return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash)); } } library EnumerableSet { // To implement this library for multiple types with as little code // repetition as possible, we write it in terms of a generic Set type with // bytes32 values. // The Set implementation uses private functions, and user-facing // implementations (such as AddressSet) are just wrappers around the // underlying Set. // This means that we can only create new EnumerableSets for types that fit // in bytes32. struct Set { // Storage of set values bytes32[] _values; // Position of the value in the `values` array, plus 1 because index 0 // means a value is not in the set. mapping (bytes32 => uint256) _indexes; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function _add(Set storage set, bytes32 value) private returns (bool) { if (!_contains(set, value)) { set._values.push(value); // The value is stored at length-1, but we add 1 to all indexes // and use 0 as a sentinel value set._indexes[value] = set._values.length; return true; } else { return false; } } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function _remove(Set storage set, bytes32 value) private returns (bool) { // We read and store the value's index to prevent multiple reads from the same storage slot uint256 valueIndex = set._indexes[value]; if (valueIndex != 0) { // Equivalent to contains(set, value) // To delete an element from the _values array in O(1), we swap the element to delete with the last one in // the array, and then remove the last element (sometimes called as 'swap and pop'). // This modifies the order of the array, as noted in {at}. uint256 toDeleteIndex = valueIndex - 1; uint256 lastIndex = set._values.length - 1; // When the value to delete is the last one, the swap operation is unnecessary. However, since this occurs // so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement. bytes32 lastvalue = set._values[lastIndex]; // Move the last value to the index where the value to delete is set._values[toDeleteIndex] = lastvalue; // Update the index for the moved value set._indexes[lastvalue] = toDeleteIndex + 1; // All indexes are 1-based // Delete the slot where the moved value was stored set._values.pop(); // Delete the index for the deleted slot delete set._indexes[value]; return true; } else { return false; } } /** * @dev Returns true if the value is in the set. O(1). */ function _contains(Set storage set, bytes32 value) private view returns (bool) { return set._indexes[value] != 0; } /** * @dev Returns the number of values on the set. O(1). */ function _length(Set storage set) private view returns (uint256) { return set._values.length; } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function _at(Set storage set, uint256 index) private view returns (bytes32) { require(set._values.length > index, "EnumerableSet: index out of bounds"); return set._values[index]; } // AddressSet struct AddressSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(AddressSet storage set, address value) internal returns (bool) { return _add(set._inner, bytes32(uint256(value))); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(AddressSet storage set, address value) internal returns (bool) { return _remove(set._inner, bytes32(uint256(value))); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(AddressSet storage set, address value) internal view returns (bool) { return _contains(set._inner, bytes32(uint256(value))); } /** * @dev Returns the number of values in the set. O(1). */ function length(AddressSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(AddressSet storage set, uint256 index) internal view returns (address) { return address(uint256(_at(set._inner, index))); } // UintSet struct UintSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(UintSet storage set, uint256 value) internal returns (bool) { return _add(set._inner, bytes32(value)); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(UintSet storage set, uint256 value) internal returns (bool) { return _remove(set._inner, bytes32(value)); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(UintSet storage set, uint256 value) internal view returns (bool) { return _contains(set._inner, bytes32(value)); } /** * @dev Returns the number of values on the set. O(1). */ function length(UintSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(UintSet storage set, uint256 index) internal view returns (uint256) { return uint256(_at(set._inner, index)); } } library FractionUtils { using SafeMath for uint; struct Fraction { uint numerator; uint denominator; } function createFraction(uint numerator, uint denominator) internal pure returns (Fraction memory) { require(denominator > 0, "Division by zero"); Fraction memory fraction = Fraction({numerator: numerator, denominator: denominator}); reduceFraction(fraction); return fraction; } function createFraction(uint value) internal pure returns (Fraction memory) { return createFraction(value, 1); } function reduceFraction(Fraction memory fraction) internal pure { uint _gcd = gcd(fraction.numerator, fraction.denominator); fraction.numerator = fraction.numerator.div(_gcd); fraction.denominator = fraction.denominator.div(_gcd); } function multiplyFraction(Fraction memory a, Fraction memory b) internal pure returns (Fraction memory) { return createFraction(a.numerator.mul(b.numerator), a.denominator.mul(b.denominator)); } function gcd(uint a, uint b) internal pure returns (uint) { uint _a = a; uint _b = b; if (_b > _a) { (_a, _b) = swap(_a, _b); } while (_b > 0) { _a = _a.mod(_b); (_a, _b) = swap (_a, _b); } return _a; } function swap(uint a, uint b) internal pure returns (uint, uint) { return (b, a); } } interface IERC777 { /** * @dev Returns the name of the token. */ function name() external view returns (string memory); /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() external view returns (string memory); /** * @dev Returns the smallest part of the token that is not divisible. This * means all token operations (creation, movement and destruction) must have * amounts that are a multiple of this number. * * For most token contracts, this value will equal 1. */ function granularity() external view returns (uint256); /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by an account (`owner`). */ function balanceOf(address owner) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * If send or receive hooks are registered for the caller and `recipient`, * the corresponding functions will be called with `data` and empty * `operatorData`. See {IERC777Sender} and {IERC777Recipient}. * * Emits a {Sent} event. * * Requirements * * - the caller must have at least `amount` tokens. * - `recipient` cannot be the zero address. * - if `recipient` is a contract, it must implement the {IERC777Recipient} * interface. */ function send(address recipient, uint256 amount, bytes calldata data) external; /** * @dev Destroys `amount` tokens from the caller's account, reducing the * total supply. * * If a send hook is registered for the caller, the corresponding function * will be called with `data` and empty `operatorData`. See {IERC777Sender}. * * Emits a {Burned} event. * * Requirements * * - the caller must have at least `amount` tokens. */ function burn(uint256 amount, bytes calldata data) external; /** * @dev Returns true if an account is an operator of `tokenHolder`. * Operators can send and burn tokens on behalf of their owners. All * accounts are their own operator. * * See {operatorSend} and {operatorBurn}. */ function isOperatorFor(address operator, address tokenHolder) external view returns (bool); /** * @dev Make an account an operator of the caller. * * See {isOperatorFor}. * * Emits an {AuthorizedOperator} event. * * Requirements * * - `operator` cannot be calling address. */ function authorizeOperator(address operator) external; /** * @dev Revoke an account's operator status for the caller. * * See {isOperatorFor} and {defaultOperators}. * * Emits a {RevokedOperator} event. * * Requirements * * - `operator` cannot be calling address. */ function revokeOperator(address operator) external; /** * @dev Returns the list of default operators. These accounts are operators * for all token holders, even if {authorizeOperator} was never called on * them. * * This list is immutable, but individual holders may revoke these via * {revokeOperator}, in which case {isOperatorFor} will return false. */ function defaultOperators() external view returns (address[] memory); /** * @dev Moves `amount` tokens from `sender` to `recipient`. The caller must * be an operator of `sender`. * * If send or receive hooks are registered for `sender` and `recipient`, * the corresponding functions will be called with `data` and * `operatorData`. See {IERC777Sender} and {IERC777Recipient}. * * Emits a {Sent} event. * * Requirements * * - `sender` cannot be the zero address. * - `sender` must have at least `amount` tokens. * - the caller must be an operator for `sender`. * - `recipient` cannot be the zero address. * - if `recipient` is a contract, it must implement the {IERC777Recipient} * interface. */ function operatorSend( address sender, address recipient, uint256 amount, bytes calldata data, bytes calldata operatorData ) external; /** * @dev Destroys `amount` tokens from `account`, reducing the total supply. * The caller must be an operator of `account`. * * If a send hook is registered for `account`, the corresponding function * will be called with `data` and `operatorData`. See {IERC777Sender}. * * Emits a {Burned} event. * * Requirements * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. * - the caller must be an operator for `account`. */ function operatorBurn( address account, uint256 amount, bytes calldata data, bytes calldata operatorData ) external; event Sent( address indexed operator, address indexed from, address indexed to, uint256 amount, bytes data, bytes operatorData ); event Minted(address indexed operator, address indexed to, uint256 amount, bytes data, bytes operatorData); event Burned(address indexed operator, address indexed from, uint256 amount, bytes data, bytes operatorData); event AuthorizedOperator(address indexed operator, address indexed tokenHolder); event RevokedOperator(address indexed operator, address indexed tokenHolder); } interface ILocker { /** * @dev Returns the locked amount of untransferable tokens of a given `wallet` */ function getAndUpdateLockedAmount(address wallet) external returns (uint); /** * @dev Returns the locked amount of untransferable and un-delegatable tokens of a given `wallet`. */ function getAndUpdateForbiddenForDelegationAmount(address wallet) external returns (uint); } contract Initializable { /** * @dev Indicates that the contract has been initialized. */ bool private initialized; /** * @dev Indicates that the contract is in the process of being initialized. */ bool private initializing; /** * @dev Modifier to use in the initializer function of a contract. */ modifier initializer() { require(initializing || isConstructor() || !initialized, "Contract instance has already been initialized"); bool isTopLevelCall = !initializing; if (isTopLevelCall) { initializing = true; initialized = true; } _; if (isTopLevelCall) { initializing = false; } } /// @dev Returns true if and only if the function is running in the constructor function isConstructor() private view returns (bool) { // extcodesize checks the size of the code stored in an address, and // address returns the current address. Since the code is still not // deployed when running a constructor, any checks on its code size will // yield zero, making it an effective way to detect if a contract is // under construction or not. address self = address(this); uint256 cs; assembly { cs := extcodesize(self) } return cs == 0; } // Reserved storage space to allow for layout changes in the future. uint256[50] private ______gap; } library MathUtils { event UnderflowError( uint a, uint b ); uint constant private _EPS = 1e6; function boundedSub(uint256 a, uint256 b) internal returns (uint256) { if (a >= b) { return a - b; } else { emit UnderflowError(a, b); return 0; } } function boundedSubWithoutEvent(uint256 a, uint256 b) internal pure returns (uint256) { if (a >= b) { return a - b; } else { return 0; } } function muchGreater(uint256 a, uint256 b) internal pure returns (bool) { assert(uint(-1) - _EPS > b); return a > b + _EPS; } function approximatelyEqual(uint256 a, uint256 b) internal pure returns (bool) { if (a > b) { return a - b < _EPS; } else { return b - a < _EPS; } } } library PartialDifferences { using SafeMath for uint; using MathUtils for uint; struct Sequence { // month => diff mapping (uint => uint) addDiff; // month => diff mapping (uint => uint) subtractDiff; // month => value mapping (uint => uint) value; uint firstUnprocessedMonth; uint lastChangedMonth; } struct Value { // month => diff mapping (uint => uint) addDiff; // month => diff mapping (uint => uint) subtractDiff; uint value; uint firstUnprocessedMonth; uint lastChangedMonth; } // functions for sequence function addToSequence(Sequence storage sequence, uint diff, uint month) internal { require(sequence.firstUnprocessedMonth <= month, "Cannot add to the past"); if (sequence.firstUnprocessedMonth == 0) { sequence.firstUnprocessedMonth = month; } sequence.addDiff[month] = sequence.addDiff[month].add(diff); if (sequence.lastChangedMonth != month) { sequence.lastChangedMonth = month; } } function subtractFromSequence(Sequence storage sequence, uint diff, uint month) internal { require(sequence.firstUnprocessedMonth <= month, "Cannot subtract from the past"); if (sequence.firstUnprocessedMonth == 0) { sequence.firstUnprocessedMonth = month; } sequence.subtractDiff[month] = sequence.subtractDiff[month].add(diff); if (sequence.lastChangedMonth != month) { sequence.lastChangedMonth = month; } } function getAndUpdateValueInSequence(Sequence storage sequence, uint month) internal returns (uint) { if (sequence.firstUnprocessedMonth == 0) { return 0; } if (sequence.firstUnprocessedMonth <= month) { for (uint i = sequence.firstUnprocessedMonth; i <= month; ++i) { uint nextValue = sequence.value[i.sub(1)].add(sequence.addDiff[i]).boundedSub(sequence.subtractDiff[i]); if (sequence.value[i] != nextValue) { sequence.value[i] = nextValue; } if (sequence.addDiff[i] > 0) { delete sequence.addDiff[i]; } if (sequence.subtractDiff[i] > 0) { delete sequence.subtractDiff[i]; } } sequence.firstUnprocessedMonth = month.add(1); } return sequence.value[month]; } function reduceSequence( Sequence storage sequence, FractionUtils.Fraction memory reducingCoefficient, uint month) internal { require(month.add(1) >= sequence.firstUnprocessedMonth, "Can't reduce value in the past"); require( reducingCoefficient.numerator <= reducingCoefficient.denominator, "Increasing of values is not implemented"); if (sequence.firstUnprocessedMonth == 0) { return; } uint value = getAndUpdateValueInSequence(sequence, month); if (value.approximatelyEqual(0)) { return; } sequence.value[month] = sequence.value[month] .mul(reducingCoefficient.numerator) .div(reducingCoefficient.denominator); for (uint i = month.add(1); i <= sequence.lastChangedMonth; ++i) { sequence.subtractDiff[i] = sequence.subtractDiff[i] .mul(reducingCoefficient.numerator) .div(reducingCoefficient.denominator); } } // functions for value function addToValue(Value storage sequence, uint diff, uint month) internal { require(sequence.firstUnprocessedMonth <= month, "Cannot add to the past"); if (sequence.firstUnprocessedMonth == 0) { sequence.firstUnprocessedMonth = month; sequence.lastChangedMonth = month; } if (month > sequence.lastChangedMonth) { sequence.lastChangedMonth = month; } if (month >= sequence.firstUnprocessedMonth) { sequence.addDiff[month] = sequence.addDiff[month].add(diff); } else { sequence.value = sequence.value.add(diff); } } function subtractFromValue(Value storage sequence, uint diff, uint month) internal { require(sequence.firstUnprocessedMonth <= month.add(1), "Cannot subtract from the past"); if (sequence.firstUnprocessedMonth == 0) { sequence.firstUnprocessedMonth = month; sequence.lastChangedMonth = month; } if (month > sequence.lastChangedMonth) { sequence.lastChangedMonth = month; } if (month >= sequence.firstUnprocessedMonth) { sequence.subtractDiff[month] = sequence.subtractDiff[month].add(diff); } else { sequence.value = sequence.value.boundedSub(diff); } } function getAndUpdateValue(Value storage sequence, uint month) internal returns (uint) { require( month.add(1) >= sequence.firstUnprocessedMonth, "Cannot calculate value in the past"); if (sequence.firstUnprocessedMonth == 0) { return 0; } if (sequence.firstUnprocessedMonth <= month) { for (uint i = sequence.firstUnprocessedMonth; i <= month; ++i) { uint newValue = sequence.value.add(sequence.addDiff[i]).boundedSub(sequence.subtractDiff[i]); if (sequence.value != newValue) { sequence.value = newValue; } if (sequence.addDiff[i] > 0) { delete sequence.addDiff[i]; } if (sequence.subtractDiff[i] > 0) { delete sequence.subtractDiff[i]; } } sequence.firstUnprocessedMonth = month.add(1); } return sequence.value; } function reduceValue( Value storage sequence, uint amount, uint month) internal returns (FractionUtils.Fraction memory) { require(month.add(1) >= sequence.firstUnprocessedMonth, "Cannot reduce value in the past"); if (sequence.firstUnprocessedMonth == 0) { return FractionUtils.createFraction(0); } uint value = getAndUpdateValue(sequence, month); if (value.approximatelyEqual(0)) { return FractionUtils.createFraction(0); } uint _amount = amount; if (value < amount) { _amount = value; } FractionUtils.Fraction memory reducingCoefficient = FractionUtils.createFraction(value.boundedSub(_amount), value); reduceValueByCoefficient(sequence, reducingCoefficient, month); return reducingCoefficient; } function reduceValueByCoefficient( Value storage sequence, FractionUtils.Fraction memory reducingCoefficient, uint month) internal { reduceValueByCoefficientAndUpdateSumIfNeeded( sequence, sequence, reducingCoefficient, month, false); } function reduceValueByCoefficientAndUpdateSum( Value storage sequence, Value storage sumSequence, FractionUtils.Fraction memory reducingCoefficient, uint month) internal { reduceValueByCoefficientAndUpdateSumIfNeeded( sequence, sumSequence, reducingCoefficient, month, true); } function reduceValueByCoefficientAndUpdateSumIfNeeded( Value storage sequence, Value storage sumSequence, FractionUtils.Fraction memory reducingCoefficient, uint month, bool hasSumSequence) internal { require(month.add(1) >= sequence.firstUnprocessedMonth, "Cannot reduce value in the past"); if (hasSumSequence) { require(month.add(1) >= sumSequence.firstUnprocessedMonth, "Cannot reduce value in the past"); } require( reducingCoefficient.numerator <= reducingCoefficient.denominator, "Increasing of values is not implemented"); if (sequence.firstUnprocessedMonth == 0) { return; } uint value = getAndUpdateValue(sequence, month); if (value.approximatelyEqual(0)) { return; } uint newValue = sequence.value.mul(reducingCoefficient.numerator).div(reducingCoefficient.denominator); if (hasSumSequence) { subtractFromValue(sumSequence, sequence.value.boundedSub(newValue), month); } sequence.value = newValue; for (uint i = month.add(1); i <= sequence.lastChangedMonth; ++i) { uint newDiff = sequence.subtractDiff[i] .mul(reducingCoefficient.numerator) .div(reducingCoefficient.denominator); if (hasSumSequence) { sumSequence.subtractDiff[i] = sumSequence.subtractDiff[i] .boundedSub(sequence.subtractDiff[i].boundedSub(newDiff)); } sequence.subtractDiff[i] = newDiff; } } function clear(Value storage sequence) internal { for (uint i = sequence.firstUnprocessedMonth; i <= sequence.lastChangedMonth; ++i) { if (sequence.addDiff[i] > 0) { delete sequence.addDiff[i]; } if (sequence.subtractDiff[i] > 0) { delete sequence.subtractDiff[i]; } } if (sequence.value > 0) { delete sequence.value; } if (sequence.firstUnprocessedMonth > 0) { delete sequence.firstUnprocessedMonth; } if (sequence.lastChangedMonth > 0) { delete sequence.lastChangedMonth; } } } library SafeCast { /** * @dev Returns the downcasted uint128 from uint256, reverting on * overflow (when the input is greater than largest uint128). * * Counterpart to Solidity's `uint128` operator. * * Requirements: * * - input must fit into 128 bits */ function toUint128(uint256 value) internal pure returns (uint128) { require(value < 2**128, "SafeCast: value doesn\'t fit in 128 bits"); return uint128(value); } /** * @dev Returns the downcasted uint64 from uint256, reverting on * overflow (when the input is greater than largest uint64). * * Counterpart to Solidity's `uint64` operator. * * Requirements: * * - input must fit into 64 bits */ function toUint64(uint256 value) internal pure returns (uint64) { require(value < 2**64, "SafeCast: value doesn\'t fit in 64 bits"); return uint64(value); } /** * @dev Returns the downcasted uint32 from uint256, reverting on * overflow (when the input is greater than largest uint32). * * Counterpart to Solidity's `uint32` operator. * * Requirements: * * - input must fit into 32 bits */ function toUint32(uint256 value) internal pure returns (uint32) { require(value < 2**32, "SafeCast: value doesn\'t fit in 32 bits"); return uint32(value); } /** * @dev Returns the downcasted uint16 from uint256, reverting on * overflow (when the input is greater than largest uint16). * * Counterpart to Solidity's `uint16` operator. * * Requirements: * * - input must fit into 16 bits */ function toUint16(uint256 value) internal pure returns (uint16) { require(value < 2**16, "SafeCast: value doesn\'t fit in 16 bits"); return uint16(value); } /** * @dev Returns the downcasted uint8 from uint256, reverting on * overflow (when the input is greater than largest uint8). * * Counterpart to Solidity's `uint8` operator. * * Requirements: * * - input must fit into 8 bits. */ function toUint8(uint256 value) internal pure returns (uint8) { require(value < 2**8, "SafeCast: value doesn\'t fit in 8 bits"); return uint8(value); } /** * @dev Converts a signed int256 into an unsigned uint256. * * Requirements: * * - input must be greater than or equal to 0. */ function toUint256(int256 value) internal pure returns (uint256) { require(value >= 0, "SafeCast: value must be positive"); return uint256(value); } /** * @dev Converts an unsigned uint256 into a signed int256. * * Requirements: * * - input must be less than or equal to maxInt256. */ function toInt256(uint256 value) internal pure returns (int256) { require(value < 2**255, "SafeCast: value doesn't fit in an int256"); return int256(value); } } library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { // Solidity only automatically asserts when dividing by 0 require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } library StringUtils { using SafeMath for uint; function strConcat(string memory a, string memory b) internal pure returns (string memory) { bytes memory _ba = bytes(a); bytes memory _bb = bytes(b); string memory ab = new string(_ba.length.add(_bb.length)); bytes memory strBytes = bytes(ab); uint k = 0; uint i = 0; for (i = 0; i < _ba.length; i++) { strBytes[k++] = _ba[i]; } for (i = 0; i < _bb.length; i++) { strBytes[k++] = _bb[i]; } return string(strBytes); } function uint2str(uint i) internal pure returns (string memory) { if (i == 0) { return "0"; } uint j = i; uint _i = i; uint len; while (j != 0) { len++; j /= 10; } bytes memory bstr = new bytes(len); uint k = len.sub(1); while (_i != 0) { bstr[k--] = byte(uint8(48 + _i % 10)); _i /= 10; } return string(bstr); } } contract TimeHelpers { using SafeMath for uint; uint constant private _ZERO_YEAR = 2020; uint constant private _FICTIOUS_MONTH_START = 1599523200; uint constant private _FICTIOUS_MONTH_NUMBER = 9; function calculateProofOfUseLockEndTime(uint month, uint lockUpPeriodDays) external view returns (uint timestamp) { timestamp = BokkyPooBahsDateTimeLibrary.addDays(monthToTimestamp(month), lockUpPeriodDays); } function addDays(uint fromTimestamp, uint n) external pure returns (uint) { return BokkyPooBahsDateTimeLibrary.addDays(fromTimestamp, n); } function addMonths(uint fromTimestamp, uint n) external pure returns (uint) { return BokkyPooBahsDateTimeLibrary.addMonths(fromTimestamp, n); } function addYears(uint fromTimestamp, uint n) external pure returns (uint) { return BokkyPooBahsDateTimeLibrary.addYears(fromTimestamp, n); } function getCurrentMonth() external view virtual returns (uint) { return timestampToMonth(now); } function timestampToDay(uint timestamp) external view returns (uint) { uint wholeDays = timestamp / BokkyPooBahsDateTimeLibrary.SECONDS_PER_DAY; uint zeroDay = BokkyPooBahsDateTimeLibrary.timestampFromDate(_ZERO_YEAR, 1, 1) / BokkyPooBahsDateTimeLibrary.SECONDS_PER_DAY; require(wholeDays >= zeroDay, "Timestamp is too far in the past"); return wholeDays - zeroDay; } function timestampToYear(uint timestamp) external view virtual returns (uint) { uint year; (year, , ) = BokkyPooBahsDateTimeLibrary.timestampToDate(timestamp); require(year >= _ZERO_YEAR, "Timestamp is too far in the past"); return year - _ZERO_YEAR; } function timestampToMonth(uint timestamp) public view virtual returns (uint) { uint year; uint month; (year, month, ) = BokkyPooBahsDateTimeLibrary.timestampToDate(timestamp); require(year >= _ZERO_YEAR, "Timestamp is too far in the past"); month = month.sub(1).add(year.sub(_ZERO_YEAR).mul(12)); require(month > 0, "Timestamp is too far in the past"); if (timestamp >= _FICTIOUS_MONTH_START) { month = month.add(1); } return month; } function monthToTimestamp(uint month) public view virtual returns (uint timestamp) { uint year = _ZERO_YEAR; uint _month = month; if (_month > _FICTIOUS_MONTH_NUMBER) { _month = _month.sub(1); } else if (_month == _FICTIOUS_MONTH_NUMBER) { return _FICTIOUS_MONTH_START; } year = year.add(_month.div(12)); _month = _month.mod(12); _month = _month.add(1); return BokkyPooBahsDateTimeLibrary.timestampFromDate(year, _month, 1); } } contract ContextUpgradeSafe is Initializable { // Empty internal constructor, to prevent people from mistakenly deploying // an instance of this contract, which should be used via inheritance. function __Context_init() internal initializer { __Context_init_unchained(); } function __Context_init_unchained() internal initializer { } function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } uint256[50] private __gap; } contract OwnableUpgradeSafe is Initializable, ContextUpgradeSafe { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ function __Ownable_init() internal initializer { __Context_init_unchained(); __Ownable_init_unchained(); } function __Ownable_init_unchained() internal initializer { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), msgSender); } /** * @dev Returns the address of the current owner. */ function owner() public view returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(_owner == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { emit OwnershipTransferred(_owner, address(0)); _owner = address(0); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } uint256[49] private __gap; } abstract contract AccessControlUpgradeSafe is Initializable, ContextUpgradeSafe { function __AccessControl_init() internal initializer { __Context_init_unchained(); __AccessControl_init_unchained(); } function __AccessControl_init_unchained() internal initializer { } using EnumerableSet for EnumerableSet.AddressSet; using Address for address; struct RoleData { EnumerableSet.AddressSet members; bytes32 adminRole; } mapping (bytes32 => RoleData) private _roles; bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00; /** * @dev Emitted when `account` is granted `role`. * * `sender` is the account that originated the contract call, an admin role * bearer except when using {_setupRole}. */ event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender); /** * @dev Emitted when `account` is revoked `role`. * * `sender` is the account that originated the contract call: * - if using `revokeRole`, it is the admin role bearer * - if using `renounceRole`, it is the role bearer (i.e. `account`) */ event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender); /** * @dev Returns `true` if `account` has been granted `role`. */ function hasRole(bytes32 role, address account) public view returns (bool) { return _roles[role].members.contains(account); } /** * @dev Returns the number of accounts that have `role`. Can be used * together with {getRoleMember} to enumerate all bearers of a role. */ function getRoleMemberCount(bytes32 role) public view returns (uint256) { return _roles[role].members.length(); } /** * @dev Returns one of the accounts that have `role`. `index` must be a * value between 0 and {getRoleMemberCount}, non-inclusive. * * Role bearers are not sorted in any particular way, and their ordering may * change at any point. * * WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure * you perform all queries on the same block. See the following * https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post] * for more information. */ function getRoleMember(bytes32 role, uint256 index) public view returns (address) { return _roles[role].members.at(index); } /** * @dev Returns the admin role that controls `role`. See {grantRole} and * {revokeRole}. * * To change a role's admin, use {_setRoleAdmin}. */ function getRoleAdmin(bytes32 role) public view returns (bytes32) { return _roles[role].adminRole; } /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function grantRole(bytes32 role, address account) public virtual { require(hasRole(_roles[role].adminRole, _msgSender()), "AccessControl: sender must be an admin to grant"); _grantRole(role, account); } /** * @dev Revokes `role` from `account`. * * If `account` had been granted `role`, emits a {RoleRevoked} event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function revokeRole(bytes32 role, address account) public virtual { require(hasRole(_roles[role].adminRole, _msgSender()), "AccessControl: sender must be an admin to revoke"); _revokeRole(role, account); } /** * @dev Revokes `role` from the calling account. * * Roles are often managed via {grantRole} and {revokeRole}: this function's * purpose is to provide a mechanism for accounts to lose their privileges * if they are compromised (such as when a trusted device is misplaced). * * If the calling account had been granted `role`, emits a {RoleRevoked} * event. * * Requirements: * * - the caller must be `account`. */ function renounceRole(bytes32 role, address account) public virtual { require(account == _msgSender(), "AccessControl: can only renounce roles for self"); _revokeRole(role, account); } /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. Note that unlike {grantRole}, this function doesn't perform any * checks on the calling account. * * [WARNING] * ==== * This function should only be called from the constructor when setting * up the initial roles for the system. * * Using this function in any other way is effectively circumventing the admin * system imposed by {AccessControl}. * ==== */ function _setupRole(bytes32 role, address account) internal virtual { _grantRole(role, account); } /** * @dev Sets `adminRole` as ``role``'s admin role. */ function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual { _roles[role].adminRole = adminRole; } function _grantRole(bytes32 role, address account) private { if (_roles[role].members.add(account)) { emit RoleGranted(role, account, _msgSender()); } } function _revokeRole(bytes32 role, address account) private { if (_roles[role].members.remove(account)) { emit RoleRevoked(role, account, _msgSender()); } } uint256[49] private __gap; } contract ContractManager is OwnableUpgradeSafe { using StringUtils for string; using Address for address; // mapping of actual smart contracts addresses mapping (bytes32 => address) public contracts; event ContractUpgraded(string contractsName, address contractsAddress); function initialize() external initializer { OwnableUpgradeSafe.__Ownable_init(); } /** * Adds actual contract to mapping of actual contract addresses * @param contractsName - contracts name in skale manager system * @param newContractsAddress - contracts address in skale manager system */ function setContractsAddress(string calldata contractsName, address newContractsAddress) external onlyOwner { // check newContractsAddress is not equal to zero require(newContractsAddress != address(0), "New address is equal zero"); // create hash of contractsName bytes32 contractId = keccak256(abi.encodePacked(contractsName)); // check newContractsAddress is not equal the previous contract's address require(contracts[contractId] != newContractsAddress, "Contract is already added"); require(newContractsAddress.isContract(), "Given contracts address does not contain code"); // add newContractsAddress to mapping of actual contract addresses contracts[contractId] = newContractsAddress; emit ContractUpgraded(contractsName, newContractsAddress); } function getContract(string calldata name) external view returns (address contractAddress) { contractAddress = contracts[keccak256(abi.encodePacked(name))]; require(contractAddress != address(0), name.strConcat(" contract has not been found")); } } contract Permissions is AccessControlUpgradeSafe { using SafeMath for uint; using Address for address; ContractManager public contractManager; /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(_isOwner(), "Caller is not the owner"); _; } modifier onlyAdmin() { require(_isAdmin(msg.sender), "Caller is not an admin"); _; } /** * @dev allow - throws if called by any account and contract other than the owner * or `contractName` contract * @param contractName - human readable name of contract */ modifier allow(string memory contractName) { require( contractManager.contracts(keccak256(abi.encodePacked(contractName))) == msg.sender || _isOwner(), "Message sender is invalid"); _; } modifier allowTwo(string memory contractName1, string memory contractName2) { require( contractManager.contracts(keccak256(abi.encodePacked(contractName1))) == msg.sender || contractManager.contracts(keccak256(abi.encodePacked(contractName2))) == msg.sender || _isOwner(), "Message sender is invalid"); _; } modifier allowThree(string memory contractName1, string memory contractName2, string memory contractName3) { require( contractManager.contracts(keccak256(abi.encodePacked(contractName1))) == msg.sender || contractManager.contracts(keccak256(abi.encodePacked(contractName2))) == msg.sender || contractManager.contracts(keccak256(abi.encodePacked(contractName3))) == msg.sender || _isOwner(), "Message sender is invalid"); _; } function initialize(address contractManagerAddress) public virtual initializer { AccessControlUpgradeSafe.__AccessControl_init(); _setupRole(DEFAULT_ADMIN_ROLE, msg.sender); _setContractManager(contractManagerAddress); } function _isOwner() internal view returns (bool) { return hasRole(DEFAULT_ADMIN_ROLE, msg.sender); } function _isAdmin(address account) internal view returns (bool) { address skaleManagerAddress = contractManager.contracts(keccak256(abi.encodePacked("SkaleManager"))); if (skaleManagerAddress != address(0)) { AccessControlUpgradeSafe skaleManager = AccessControlUpgradeSafe(skaleManagerAddress); return skaleManager.hasRole(keccak256("ADMIN_ROLE"), account) || _isOwner(); } else { return _isOwner(); } } function _setContractManager(address contractManagerAddress) private { require(contractManagerAddress != address(0), "ContractManager address is not set"); require(contractManagerAddress.isContract(), "Address is not contract"); contractManager = ContractManager(contractManagerAddress); } } contract Punisher is Permissions, ILocker { /** * @dev Emitted when a slashing condition occurs. */ event Slash( uint validatorId, uint amount ); /** * @dev Emitted when a forgive condition occurs. */ event Forgive( address wallet, uint amount ); // holder => tokens mapping (address => uint) private _locked; /** * @dev Executes slashing on a validator and its delegations by an `amount` * of tokens. Currently, SkaleDKG is the only service allowed to execute * slashing. * * Emits a Slash event. * * @param validatorId uint validator to be slashed * @param amount uint slashed amount */ function slash(uint validatorId, uint amount) external allow("SkaleDKG") { ValidatorService validatorService = ValidatorService(contractManager.getContract("ValidatorService")); DelegationController delegationController = DelegationController( contractManager.getContract("DelegationController")); require(validatorService.validatorExists(validatorId), "Validator does not exist"); delegationController.confiscate(validatorId, amount); emit Slash(validatorId, amount); } /** * @dev Allows the Owner to forgive a slashing condition. * * Emits a Forgive event. * * @param holder address of the slashed * @param amount uint amount to be forgiven */ function forgive(address holder, uint amount) external onlyAdmin { DelegationController delegationController = DelegationController( contractManager.getContract("DelegationController")); require(!delegationController.hasUnprocessedSlashes(holder), "Not all slashes were calculated"); if (amount > _locked[holder]) { delete _locked[holder]; } else { _locked[holder] = _locked[holder].sub(amount); } emit Forgive(holder, amount); } /** * @dev See ILocker-getAndUpdateLockedAmount */ function getAndUpdateLockedAmount(address wallet) external override returns (uint) { return _getAndUpdateLockedAmount(wallet); } /** * @dev See ILocker-getAndUpdateForbiddenForDelegationAmount */ function getAndUpdateForbiddenForDelegationAmount(address wallet) external override returns (uint) { return _getAndUpdateLockedAmount(wallet); } function handleSlash(address holder, uint amount) external allow("DelegationController") { _locked[holder] = _locked[holder].add(amount); } function initialize(address contractManagerAddress) public override initializer { Permissions.initialize(contractManagerAddress); } // private function _getAndUpdateLockedAmount(address wallet) private returns (uint) { DelegationController delegationController = DelegationController( contractManager.getContract("DelegationController")); delegationController.processAllSlashes(wallet); return _locked[wallet]; } } contract TokenLaunchLocker is Permissions, ILocker { using MathUtils for uint; using PartialDifferences for PartialDifferences.Value; /** * @dev Emitted when an `amount` is unlocked. */ event Unlocked( address holder, uint amount ); /** * @dev Emitted when an `amount` is locked. */ event Locked( address holder, uint amount ); struct DelegatedAmountAndMonth { uint delegated; uint month; } // holder => tokens mapping (address => uint) private _locked; // holder => tokens mapping (address => PartialDifferences.Value) private _delegatedAmount; mapping (address => DelegatedAmountAndMonth) private _totalDelegatedAmount; // delegationId => tokens mapping (uint => uint) private _delegationAmount; function lock(address holder, uint amount) external allow("TokenLaunchManager") { _locked[holder] = _locked[holder].add(amount); emit Locked(holder, amount); } function handleDelegationAdd( address holder, uint delegationId, uint amount, uint month) external allow("DelegationController") { if (_locked[holder] > 0) { TimeHelpers timeHelpers = TimeHelpers(contractManager.getContract("TimeHelpers")); uint currentMonth = timeHelpers.getCurrentMonth(); uint fromLocked = amount; uint locked = _locked[holder].boundedSub(_getAndUpdateDelegatedAmount(holder, currentMonth)); if (fromLocked > locked) { fromLocked = locked; } if (fromLocked > 0) { require(_delegationAmount[delegationId] == 0, "Delegation was already added"); _addToDelegatedAmount(holder, fromLocked, month); _addToTotalDelegatedAmount(holder, fromLocked, month); _delegationAmount[delegationId] = fromLocked; } } } function handleDelegationRemoving( address holder, uint delegationId, uint month) external allow("DelegationController") { if (_delegationAmount[delegationId] > 0) { if (_locked[holder] > 0) { _removeFromDelegatedAmount(holder, _delegationAmount[delegationId], month); } delete _delegationAmount[delegationId]; } } function getAndUpdateLockedAmount(address wallet) external override returns (uint) { if (_locked[wallet] > 0) { DelegationController delegationController = DelegationController( contractManager.getContract("DelegationController")); TimeHelpers timeHelpers = TimeHelpers(contractManager.getContract("TimeHelpers")); ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); uint currentMonth = timeHelpers.getCurrentMonth(); if (_totalDelegatedSatisfiesProofOfUserCondition(wallet) && timeHelpers.calculateProofOfUseLockEndTime( _totalDelegatedAmount[wallet].month, constantsHolder.proofOfUseLockUpPeriodDays() ) <= now) { _unlock(wallet); return 0; } else { uint lockedByDelegationController = _getAndUpdateDelegatedAmount(wallet, currentMonth) .add(delegationController.getLockedInPendingDelegations(wallet)); if (_locked[wallet] > lockedByDelegationController) { return _locked[wallet].boundedSub(lockedByDelegationController); } else { return 0; } } } else { return 0; } } function getAndUpdateForbiddenForDelegationAmount(address) external override returns (uint) { return 0; } function initialize(address contractManagerAddress) public override initializer { Permissions.initialize(contractManagerAddress); } // private function _getAndUpdateDelegatedAmount(address holder, uint currentMonth) private returns (uint) { return _delegatedAmount[holder].getAndUpdateValue(currentMonth); } function _addToDelegatedAmount(address holder, uint amount, uint month) private { _delegatedAmount[holder].addToValue(amount, month); } function _removeFromDelegatedAmount(address holder, uint amount, uint month) private { _delegatedAmount[holder].subtractFromValue(amount, month); } function _addToTotalDelegatedAmount(address holder, uint amount, uint month) private { require( _totalDelegatedAmount[holder].month == 0 || _totalDelegatedAmount[holder].month <= month, "Can't add to total delegated in the past"); // do not update counter if it is big enough // because it will override month value if (!_totalDelegatedSatisfiesProofOfUserCondition(holder)) { _totalDelegatedAmount[holder].delegated = _totalDelegatedAmount[holder].delegated.add(amount); _totalDelegatedAmount[holder].month = month; } } function _unlock(address holder) private { emit Unlocked(holder, _locked[holder]); delete _locked[holder]; _deleteDelegatedAmount(holder); _deleteTotalDelegatedAmount(holder); } function _deleteDelegatedAmount(address holder) private { _delegatedAmount[holder].clear(); } function _deleteTotalDelegatedAmount(address holder) private { delete _totalDelegatedAmount[holder].delegated; delete _totalDelegatedAmount[holder].month; } function _totalDelegatedSatisfiesProofOfUserCondition(address holder) private view returns (bool) { ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); return _totalDelegatedAmount[holder].delegated.mul(100) >= _locked[holder].mul(constantsHolder.proofOfUseDelegationPercentage()); } } contract TokenState is Permissions, ILocker { /** * @dev Emitted when a contract is added to the locker. */ event LockerWasAdded( string locker ); /** * @dev Emitted when a contract is removed from the locker. */ event LockerWasRemoved( string locker ); string[] private _lockers; /** * @dev Return and update the total locked amount of a given `holder`. * * @param holder address of the token holder * @return total locked amount */ function getAndUpdateLockedAmount(address holder) external override returns (uint) { uint locked = 0; for (uint i = 0; i < _lockers.length; ++i) { ILocker locker = ILocker(contractManager.getContract(_lockers[i])); locked = locked.add(locker.getAndUpdateLockedAmount(holder)); } return locked; } /** * @dev Return and update the total locked and un-delegatable amount of a given `holder`. * * @param holder address of the token holder * @return amount total slashed amount (non-transferable and non-delegatable) */ function getAndUpdateForbiddenForDelegationAmount(address holder) external override returns (uint amount) { uint forbidden = 0; for (uint i = 0; i < _lockers.length; ++i) { ILocker locker = ILocker(contractManager.getContract(_lockers[i])); forbidden = forbidden.add(locker.getAndUpdateForbiddenForDelegationAmount(holder)); } return forbidden; } /** * @dev Allows the Owner to remove a contract from the locker. * * Emits a LockerWasRemoved event. * * @param locker string name of contract to remove from locker */ function removeLocker(string calldata locker) external onlyOwner { uint index; bytes32 hash = keccak256(abi.encodePacked(locker)); for (index = 0; index < _lockers.length; ++index) { if (keccak256(abi.encodePacked(_lockers[index])) == hash) { break; } } if (index < _lockers.length) { if (index < _lockers.length.sub(1)) { _lockers[index] = _lockers[_lockers.length.sub(1)]; } delete _lockers[_lockers.length.sub(1)]; _lockers.pop(); emit LockerWasRemoved(locker); } } function initialize(address contractManagerAddress) public override initializer { Permissions.initialize(contractManagerAddress); addLocker("DelegationController"); addLocker("Punisher"); addLocker("TokenLaunchLocker"); } /** * @dev Allows the Owner to add a contract to the Locker. * * Emits a LockerWasAdded event. * * @param locker string name of contract to add to locker */ function addLocker(string memory locker) public onlyOwner { _lockers.push(locker); emit LockerWasAdded(locker); } } contract ValidatorService is Permissions { using ECDSA for bytes32; struct Validator { string name; address validatorAddress; address requestedAddress; string description; uint feeRate; uint registrationTime; uint minimumDelegationAmount; bool acceptNewRequests; } /** * @dev Emitted when a validator registers. */ event ValidatorRegistered( uint validatorId ); /** * @dev Emitted when a validator address changes. */ event ValidatorAddressChanged( uint validatorId, address newAddress ); event ValidatorWasEnabled( uint validatorId ); event ValidatorWasDisabled( uint validatorId ); /** * @dev Emitted when a node address is linked to a validator. */ event NodeAddressWasAdded( uint validatorId, address nodeAddress ); /** * @dev Emitted when a node address is unlinked from a validator. */ event NodeAddressWasRemoved( uint validatorId, address nodeAddress ); mapping (uint => Validator) public validators; mapping (uint => bool) private _trustedValidators; uint[] public trustedValidatorsList; // address => validatorId mapping (address => uint) private _validatorAddressToId; // address => validatorId mapping (address => uint) private _nodeAddressToValidatorId; // validatorId => nodeAddress[] mapping (uint => address[]) private _nodeAddresses; uint public numberOfValidators; bool public useWhitelist; modifier checkValidatorExists(uint validatorId) { require(validatorExists(validatorId), "Validator with such ID does not exist"); _; } /** * @dev Creates a new validator Id. * * Requirements: * * - sender must not already have registered a validator Id. * - fee rate must be between 0 - 1000‰. Note: per mille! * * Emits ValidatorRegistered event. * * @param name string * @param description string * @param feeRate uint Fee charged on delegations by the validator per mille * @param minimumDelegationAmount uint Minimum delegation amount accepted by the validator */ function registerValidator( string calldata name, string calldata description, uint feeRate, uint minimumDelegationAmount ) external returns (uint validatorId) { require(!validatorAddressExists(msg.sender), "Validator with such address already exists"); require(feeRate < 1000, "Fee rate of validator should be lower than 100%"); validatorId = ++numberOfValidators; validators[validatorId] = Validator( name, msg.sender, address(0), description, feeRate, now, minimumDelegationAmount, true ); _setValidatorAddress(validatorId, msg.sender); emit ValidatorRegistered(validatorId); } function enableValidator(uint validatorId) external checkValidatorExists(validatorId) onlyAdmin { require(!_trustedValidators[validatorId], "Validator is already enabled"); _trustedValidators[validatorId] = true; trustedValidatorsList.push(validatorId); emit ValidatorWasEnabled(validatorId); } function disableValidator(uint validatorId) external checkValidatorExists(validatorId) onlyAdmin { require(_trustedValidators[validatorId], "Validator is already disabled"); _trustedValidators[validatorId] = false; uint position = _find(trustedValidatorsList, validatorId); if (position < trustedValidatorsList.length) { trustedValidatorsList[position] = trustedValidatorsList[trustedValidatorsList.length.sub(1)]; } trustedValidatorsList.pop(); emit ValidatorWasDisabled(validatorId); } /** * @dev Owner can disable the validator whitelist. Once turned off the * whitelist cannot be re-enabled. */ function disableWhitelist() external onlyOwner { useWhitelist = false; } /** * @dev Allows a validator to request a new address. * * Requirements: * * - new address must not be null * - new address must not be already registered as a validator * * @param newValidatorAddress address */ function requestForNewAddress(address newValidatorAddress) external { require(newValidatorAddress != address(0), "New address cannot be null"); require(_validatorAddressToId[newValidatorAddress] == 0, "Address already registered"); // check Validator Exist inside getValidatorId uint validatorId = getValidatorId(msg.sender); validators[validatorId].requestedAddress = newValidatorAddress; } function confirmNewAddress(uint validatorId) external checkValidatorExists(validatorId) { require( getValidator(validatorId).requestedAddress == msg.sender, "The validator address cannot be changed because it is not the actual owner" ); delete validators[validatorId].requestedAddress; _setValidatorAddress(validatorId, msg.sender); emit ValidatorAddressChanged(validatorId, validators[validatorId].validatorAddress); } /** * @dev Links a given node address. * * Requirements: * * - the given signature must be valid. * - the address must not be assigned to a validator. * * Emits NodeAddressWasAdded event. * * @param nodeAddress address * @param sig bytes signature of validator Id by node operator. */ function linkNodeAddress(address nodeAddress, bytes calldata sig) external { // check Validator Exist inside getValidatorId uint validatorId = getValidatorId(msg.sender); require( keccak256(abi.encodePacked(validatorId)).toEthSignedMessageHash().recover(sig) == nodeAddress, "Signature is not pass" ); require(_validatorAddressToId[nodeAddress] == 0, "Node address is a validator"); _addNodeAddress(validatorId, nodeAddress); emit NodeAddressWasAdded(validatorId, nodeAddress); } /** * @dev Unlinks a given node address from a validator. * * Emits NodeAddressWasRemoved event. * * @param nodeAddress address */ function unlinkNodeAddress(address nodeAddress) external { // check Validator Exist inside getValidatorId uint validatorId = getValidatorId(msg.sender); _removeNodeAddress(validatorId, nodeAddress); emit NodeAddressWasRemoved(validatorId, nodeAddress); } function setValidatorMDA(uint minimumDelegationAmount) external { // check Validator Exist inside getValidatorId uint validatorId = getValidatorId(msg.sender); validators[validatorId].minimumDelegationAmount = minimumDelegationAmount; } /** * @dev Allows a validator to set a new validator name. * * @param newName string */ function setValidatorName(string calldata newName) external { // check Validator Exist inside getValidatorId uint validatorId = getValidatorId(msg.sender); validators[validatorId].name = newName; } /** * @dev Allows a validator to set a new validator description. * * @param newDescription string */ function setValidatorDescription(string calldata newDescription) external { // check Validator Exist inside getValidatorId uint validatorId = getValidatorId(msg.sender); validators[validatorId].description = newDescription; } /** * @dev Allows a validator to start accepting new delegation requests. * * Requirements: * * - validator must not have already enabled accepting new requests */ function startAcceptingNewRequests() external { // check Validator Exist inside getValidatorId uint validatorId = getValidatorId(msg.sender); require(!isAcceptingNewRequests(validatorId), "Accepting request is already enabled"); validators[validatorId].acceptNewRequests = true; } /** * @dev Allows a validator to stop accepting new delegation requests. * * Requirements: * * - validator must not have already stopped accepting new requests */ function stopAcceptingNewRequests() external { // check Validator Exist inside getValidatorId uint validatorId = getValidatorId(msg.sender); require(isAcceptingNewRequests(validatorId), "Accepting request is already disabled"); validators[validatorId].acceptNewRequests = false; } /** * @dev Returns the amount of validator bond. * * @param validatorId uint ID of validator to return the amount of locked funds * @return bondAmount uint the amount of self-delegated funds by the validator */ function getAndUpdateBondAmount(uint validatorId) external returns (uint) { DelegationController delegationController = DelegationController( contractManager.getContract("DelegationController") ); return delegationController.getAndUpdateDelegatedByHolderToValidatorNow( getValidator(validatorId).validatorAddress, validatorId ); } function getMyNodesAddresses() external view returns (address[] memory) { return getNodeAddresses(getValidatorId(msg.sender)); } /** * @dev Returns a list of trusted validators. * * @return uint[] trusted validators */ function getTrustedValidators() external view returns (uint[] memory) { return trustedValidatorsList; } function checkMinimumDelegation(uint validatorId, uint amount) external view checkValidatorExists(validatorId) allow("DelegationController") returns (bool) { return validators[validatorId].minimumDelegationAmount <= amount ? true : false; } function checkValidatorAddressToId(address validatorAddress, uint validatorId) external view returns (bool) { return getValidatorId(validatorAddress) == validatorId ? true : false; } function getValidatorIdByNodeAddress(address nodeAddress) external view returns (uint validatorId) { validatorId = _nodeAddressToValidatorId[nodeAddress]; require(validatorId != 0, "Node address is not assigned to a validator"); } function isAuthorizedValidator(uint validatorId) external view checkValidatorExists(validatorId) returns (bool) { return _trustedValidators[validatorId] || !useWhitelist; } function initialize(address contractManagerAddress) public override initializer { Permissions.initialize(contractManagerAddress); useWhitelist = true; } function getNodeAddresses(uint validatorId) public view returns (address[] memory) { return _nodeAddresses[validatorId]; } function validatorExists(uint validatorId) public view returns (bool) { return validatorId <= numberOfValidators && validatorId != 0; } function validatorAddressExists(address validatorAddress) public view returns (bool) { return _validatorAddressToId[validatorAddress] != 0; } function checkIfValidatorAddressExists(address validatorAddress) public view { require(validatorAddressExists(validatorAddress), "Validator with given address does not exist"); } function getValidator(uint validatorId) public view checkValidatorExists(validatorId) returns (Validator memory) { return validators[validatorId]; } function getValidatorId(address validatorAddress) public view returns (uint) { checkIfValidatorAddressExists(validatorAddress); return _validatorAddressToId[validatorAddress]; } function isAcceptingNewRequests(uint validatorId) public view checkValidatorExists(validatorId) returns (bool) { return validators[validatorId].acceptNewRequests; } // private function _setValidatorAddress(uint validatorId, address validatorAddress) private { if (_validatorAddressToId[validatorAddress] == validatorId) { return; } require(_validatorAddressToId[validatorAddress] == 0, "Address is in use by another validator"); address oldAddress = validators[validatorId].validatorAddress; delete _validatorAddressToId[oldAddress]; _nodeAddressToValidatorId[validatorAddress] = validatorId; validators[validatorId].validatorAddress = validatorAddress; _validatorAddressToId[validatorAddress] = validatorId; } function _addNodeAddress(uint validatorId, address nodeAddress) private { if (_nodeAddressToValidatorId[nodeAddress] == validatorId) { return; } require(_nodeAddressToValidatorId[nodeAddress] == 0, "Validator cannot override node address"); _nodeAddressToValidatorId[nodeAddress] = validatorId; _nodeAddresses[validatorId].push(nodeAddress); } function _removeNodeAddress(uint validatorId, address nodeAddress) private { require(_nodeAddressToValidatorId[nodeAddress] == validatorId, "Validator does not have permissions to unlink node"); delete _nodeAddressToValidatorId[nodeAddress]; for (uint i = 0; i < _nodeAddresses[validatorId].length; ++i) { if (_nodeAddresses[validatorId][i] == nodeAddress) { if (i + 1 < _nodeAddresses[validatorId].length) { _nodeAddresses[validatorId][i] = _nodeAddresses[validatorId][_nodeAddresses[validatorId].length.sub(1)]; } delete _nodeAddresses[validatorId][_nodeAddresses[validatorId].length.sub(1)]; _nodeAddresses[validatorId].pop(); break; } } } function _find(uint[] memory array, uint index) private pure returns (uint) { uint i; for (i = 0; i < array.length; i++) { if (array[i] == index) { return i; } } return array.length; } } contract ConstantsHolder is Permissions { // initial price for creating Node (100 SKL) uint public constant NODE_DEPOSIT = 100 * 1e18; uint8 public constant TOTAL_SPACE_ON_NODE = 128; // part of Node for Small Skale-chain (1/128 of Node) uint8 public constant SMALL_DIVISOR = 128; // part of Node for Medium Skale-chain (1/8 of Node) uint8 public constant MEDIUM_DIVISOR = 8; // part of Node for Large Skale-chain (full Node) uint8 public constant LARGE_DIVISOR = 1; // part of Node for Medium Test Skale-chain (1/4 of Node) uint8 public constant MEDIUM_TEST_DIVISOR = 4; // typically number of Nodes for Skale-chain (16 Nodes) uint public constant NUMBER_OF_NODES_FOR_SCHAIN = 16; // number of Nodes for Test Skale-chain (2 Nodes) uint public constant NUMBER_OF_NODES_FOR_TEST_SCHAIN = 2; // number of Nodes for Test Skale-chain (4 Nodes) uint public constant NUMBER_OF_NODES_FOR_MEDIUM_TEST_SCHAIN = 4; // number of seconds in one year uint32 public constant SECONDS_TO_YEAR = 31622400; // initial number of monitors uint public constant NUMBER_OF_MONITORS = 24; uint public constant OPTIMAL_LOAD_PERCENTAGE = 80; uint public constant ADJUSTMENT_SPEED = 1000; uint public constant COOLDOWN_TIME = 60; uint public constant MIN_PRICE = 10**6; uint public constant MSR_REDUCING_COEFFICIENT = 2; uint public constant DOWNTIME_THRESHOLD_PART = 30; uint public constant BOUNTY_LOCKUP_MONTHS = 3; // MSR - Minimum staking requirement uint public msr; // Reward period - 30 days (each 30 days Node would be granted for bounty) uint32 public rewardPeriod; // Allowable latency - 150000 ms by default uint32 public allowableLatency; /** * Delta period - 1 hour (1 hour before Reward period became Monitors need * to send Verdicts and 1 hour after Reward period became Node need to come * and get Bounty) */ uint32 public deltaPeriod; /** * Check time - 2 minutes (every 2 minutes monitors should check metrics * from checked nodes) */ uint public checkTime; //Need to add minimal allowed parameters for verdicts uint public launchTimestamp; uint public rotationDelay; uint public proofOfUseLockUpPeriodDays; uint public proofOfUseDelegationPercentage; uint public limitValidatorsPerDelegator; uint public firstDelegationsMonth; /** * Set reward and delta periods to new one, run only by owner. This function * only for tests. * @param newRewardPeriod - new Reward period * @param newDeltaPeriod - new Delta period */ function setPeriods(uint32 newRewardPeriod, uint32 newDeltaPeriod) external onlyOwner { require( newRewardPeriod >= newDeltaPeriod && newRewardPeriod - newDeltaPeriod >= checkTime, "Incorrect Periods" ); rewardPeriod = newRewardPeriod; deltaPeriod = newDeltaPeriod; } /** * Set new check time. This function only for tests. * @param newCheckTime - new check time */ function setCheckTime(uint newCheckTime) external onlyOwner { require(rewardPeriod - deltaPeriod >= checkTime, "Incorrect check time"); checkTime = newCheckTime; } /** * Set latency new one in ms, run only by owner. This function * only for tests. * @param newAllowableLatency - new Allowable Latency */ function setLatency(uint32 newAllowableLatency) external onlyOwner { allowableLatency = newAllowableLatency; } function setMSR(uint newMSR) external onlyOwner { msr = newMSR; } function setLaunchTimestamp(uint timestamp) external onlyOwner { require(now < launchTimestamp, "Can't set network launch timestamp because network is already launched"); launchTimestamp = timestamp; } function setRotationDelay(uint newDelay) external onlyOwner { rotationDelay = newDelay; } function setProofOfUseLockUpPeriod(uint periodDays) external onlyOwner { proofOfUseLockUpPeriodDays = periodDays; } function setProofOfUseDelegationPercentage(uint percentage) external onlyOwner { require(percentage <= 100, "Percentage value is incorrect"); proofOfUseDelegationPercentage = percentage; } function setLimitValidatorsPerDelegator(uint newLimit) external onlyOwner { limitValidatorsPerDelegator = newLimit; } function setFirstDelegationsMonth(uint month) external onlyOwner { firstDelegationsMonth = month; } /** * @dev constructor in Permissions approach * @param contractsAddress needed in Permissions constructor */ function initialize(address contractsAddress) public override initializer { Permissions.initialize(contractsAddress); msr = 0; rewardPeriod = 2592000; allowableLatency = 150000; deltaPeriod = 3600; checkTime = 300; launchTimestamp = uint(-1); rotationDelay = 12 hours; proofOfUseLockUpPeriodDays = 90; proofOfUseDelegationPercentage = 50; limitValidatorsPerDelegator = 20; firstDelegationsMonth = 8; } } contract DelegationController is Permissions, ILocker { using MathUtils for uint; using PartialDifferences for PartialDifferences.Sequence; using PartialDifferences for PartialDifferences.Value; using FractionUtils for FractionUtils.Fraction; enum State { PROPOSED, ACCEPTED, CANCELED, REJECTED, DELEGATED, UNDELEGATION_REQUESTED, COMPLETED } struct Delegation { address holder; // address of token owner uint validatorId; uint amount; uint delegationPeriod; uint created; // time of delegation creation uint started; // month when a delegation becomes active uint finished; // first month after a delegation ends string info; } struct SlashingLogEvent { FractionUtils.Fraction reducingCoefficient; uint nextMonth; } struct SlashingLog { // month => slashing event mapping (uint => SlashingLogEvent) slashes; uint firstMonth; uint lastMonth; } struct DelegationExtras { uint lastSlashingMonthBeforeDelegation; } struct SlashingEvent { FractionUtils.Fraction reducingCoefficient; uint validatorId; uint month; } struct SlashingSignal { address holder; uint penalty; } struct LockedInPending { uint amount; uint month; } struct FirstDelegationMonth { // month uint value; //validatorId => month mapping (uint => uint) byValidator; } struct ValidatorsStatistics { // number of validators uint number; //validatorId => bool - is Delegated or not mapping (uint => uint) delegated; } /** * @dev Emitted when a delegation is proposed to a validator. */ event DelegationProposed( uint delegationId ); /** * @dev Emitted when a delegation is accepted by a validator. */ event DelegationAccepted( uint delegationId ); /** * @dev Emitted when a delegation is cancelled by the delegator. */ event DelegationRequestCanceledByUser( uint delegationId ); /** * @dev Emitted when a delegation is requested to undelegate. */ event UndelegationRequested( uint delegationId ); /// @dev delegations will never be deleted to index in this array may be used like delegation id Delegation[] public delegations; // validatorId => delegationId[] mapping (uint => uint[]) public delegationsByValidator; // holder => delegationId[] mapping (address => uint[]) public delegationsByHolder; // delegationId => extras mapping(uint => DelegationExtras) private _delegationExtras; // validatorId => sequence mapping (uint => PartialDifferences.Value) private _delegatedToValidator; // validatorId => sequence mapping (uint => PartialDifferences.Sequence) private _effectiveDelegatedToValidator; // validatorId => slashing log mapping (uint => SlashingLog) private _slashesOfValidator; // holder => sequence mapping (address => PartialDifferences.Value) private _delegatedByHolder; // holder => validatorId => sequence mapping (address => mapping (uint => PartialDifferences.Value)) private _delegatedByHolderToValidator; // holder => validatorId => sequence mapping (address => mapping (uint => PartialDifferences.Sequence)) private _effectiveDelegatedByHolderToValidator; SlashingEvent[] private _slashes; // holder => index in _slashes; mapping (address => uint) private _firstUnprocessedSlashByHolder; // holder => validatorId => month mapping (address => FirstDelegationMonth) private _firstDelegationMonth; // holder => locked in pending mapping (address => LockedInPending) private _lockedInPendingDelegations; mapping (address => ValidatorsStatistics) private _numberOfValidatorsPerDelegator; /** * @dev Modifier to make a function callable only if delegation exists. */ modifier checkDelegationExists(uint delegationId) { require(delegationId < delegations.length, "Delegation does not exist"); _; } function getAndUpdateDelegatedToValidatorNow(uint validatorId) external returns (uint) { return getAndUpdateDelegatedToValidator(validatorId, _getCurrentMonth()); } function getAndUpdateDelegatedAmount(address holder) external returns (uint) { return _getAndUpdateDelegatedByHolder(holder); } function getAndUpdateEffectiveDelegatedByHolderToValidator(address holder, uint validatorId, uint month) external allow("Distributor") returns (uint effectiveDelegated) { SlashingSignal[] memory slashingSignals = _processAllSlashesWithoutSignals(holder); effectiveDelegated = _effectiveDelegatedByHolderToValidator[holder][validatorId] .getAndUpdateValueInSequence(month); _sendSlashingSignals(slashingSignals); } /** * @dev Allows a token holder to create a delegation proposal of an `amount` * and `delegationPeriod` to a `validatorId`. Delegation must be accepted * by the validator before the UTC start of the month, otherwise the * delegation will be rejected. * * The token holder may add additional information in each proposal. * * @param validatorId uint ID of validator to receive delegation proposal * @param amount uint amount of proposed delegation * @param delegationPeriod uint period of proposed delegation * @param info string extra information provided by the token holder (if any) */ function delegate( uint validatorId, uint amount, uint delegationPeriod, string calldata info ) external { ValidatorService validatorService = ValidatorService(contractManager.getContract("ValidatorService")); DelegationPeriodManager delegationPeriodManager = DelegationPeriodManager( contractManager.getContract("DelegationPeriodManager")); IERC777 skaleToken = IERC777(contractManager.getContract("SkaleToken")); TokenState tokenState = TokenState(contractManager.getContract("TokenState")); require( validatorService.checkMinimumDelegation(validatorId, amount), "Amount does not meet the validator's minimum delegation amount"); require( validatorService.isAuthorizedValidator(validatorId), "Validator is not authorized to accept delegation request"); require( delegationPeriodManager.isDelegationPeriodAllowed(delegationPeriod), "This delegation period is not allowed"); require( validatorService.isAcceptingNewRequests(validatorId), "The validator is not currently accepting new requests"); _checkIfDelegationIsAllowed(msg.sender, validatorId); SlashingSignal[] memory slashingSignals = _processAllSlashesWithoutSignals(msg.sender); uint delegationId = _addDelegation( msg.sender, validatorId, amount, delegationPeriod, info); // check that there is enough money uint holderBalance = skaleToken.balanceOf(msg.sender); uint forbiddenForDelegation = tokenState.getAndUpdateForbiddenForDelegationAmount(msg.sender); require(holderBalance >= forbiddenForDelegation, "Token holder does not have enough tokens to delegate"); emit DelegationProposed(delegationId); _sendSlashingSignals(slashingSignals); } /** * @dev See ILocker. */ function getAndUpdateLockedAmount(address wallet) external override returns (uint) { return _getAndUpdateLockedAmount(wallet); } /** * @dev See ILocker. */ function getAndUpdateForbiddenForDelegationAmount(address wallet) external override returns (uint) { return _getAndUpdateLockedAmount(wallet); } /** * @dev Allows a token holder to cancel a delegation proposal. * * Requirements: * * - the sender must be the token holder of the delegation proposal. * - the delegation must still be in a PROPOSED state. * * Emits a DelegationRequestCanceledByUser event. * * @param delegationId uint ID of delegation proposal */ function cancelPendingDelegation(uint delegationId) external checkDelegationExists(delegationId) { require(msg.sender == delegations[delegationId].holder, "Only token holders can cancel delegation request"); require(getState(delegationId) == State.PROPOSED, "Token holders are only able to cancel PROPOSED delegations"); delegations[delegationId].finished = _getCurrentMonth(); _subtractFromLockedInPendingDelegations(delegations[delegationId].holder, delegations[delegationId].amount); emit DelegationRequestCanceledByUser(delegationId); } /** * @dev Allows a validator to accept a proposed delegation. * Successful acceptance of delegations transition the tokens from a * PROPOSED state to ACCEPTED, and tokens are locked for the remainder of the * delegation period. * * Emits a DelegationAccepted event. * * @param delegationId uint ID of delegation proposal */ function acceptPendingDelegation(uint delegationId) external checkDelegationExists(delegationId) { ValidatorService validatorService = ValidatorService(contractManager.getContract("ValidatorService")); require( validatorService.checkValidatorAddressToId(msg.sender, delegations[delegationId].validatorId), "No permissions to accept request"); _checkIfDelegationIsAllowed(delegations[delegationId].holder, delegations[delegationId].validatorId); State currentState = getState(delegationId); if (currentState != State.PROPOSED) { if (currentState == State.ACCEPTED || currentState == State.DELEGATED || currentState == State.UNDELEGATION_REQUESTED || currentState == State.COMPLETED) { revert("The delegation has been already accepted"); } else if (currentState == State.CANCELED) { revert("The delegation has been cancelled by token holder"); } else if (currentState == State.REJECTED) { revert("The delegation request is outdated"); } } require(currentState == State.PROPOSED, "Cannot set delegation state to accepted"); TokenLaunchLocker tokenLaunchLocker = TokenLaunchLocker(contractManager.getContract("TokenLaunchLocker")); SlashingSignal[] memory slashingSignals = _processAllSlashesWithoutSignals(delegations[delegationId].holder); _addToAllStatistics(delegationId); tokenLaunchLocker.handleDelegationAdd( delegations[delegationId].holder, delegationId, delegations[delegationId].amount, delegations[delegationId].started); _sendSlashingSignals(slashingSignals); emit DelegationAccepted(delegationId); } /** * @dev Allows a delegator to undelegate a specific delegation. * * Requirements: * * - the sender must be the delegator. * - the delegation must be in DELEGATED state. * * Emits an UndelegationRequested event. * * @param delegationId uint ID of delegation to undelegate */ function requestUndelegation(uint delegationId) external checkDelegationExists(delegationId) { require(getState(delegationId) == State.DELEGATED, "Cannot request undelegation"); ValidatorService validatorService = ValidatorService(contractManager.getContract("ValidatorService")); require( delegations[delegationId].holder == msg.sender || (validatorService.validatorAddressExists(msg.sender) && delegations[delegationId].validatorId == validatorService.getValidatorId(msg.sender)), "Permission denied to request undelegation"); TokenLaunchLocker tokenLaunchLocker = TokenLaunchLocker(contractManager.getContract("TokenLaunchLocker")); DelegationPeriodManager delegationPeriodManager = DelegationPeriodManager( contractManager.getContract("DelegationPeriodManager")); _removeValidatorFromValidatorsPerDelegators( delegations[delegationId].holder, delegations[delegationId].validatorId ); processAllSlashes(msg.sender); delegations[delegationId].finished = _calculateDelegationEndMonth(delegationId); uint amountAfterSlashing = _calculateDelegationAmountAfterSlashing(delegationId); _removeFromDelegatedToValidator( delegations[delegationId].validatorId, amountAfterSlashing, delegations[delegationId].finished); _removeFromDelegatedByHolder( delegations[delegationId].holder, amountAfterSlashing, delegations[delegationId].finished); _removeFromDelegatedByHolderToValidator( delegations[delegationId].holder, delegations[delegationId].validatorId, amountAfterSlashing, delegations[delegationId].finished); uint effectiveAmount = amountAfterSlashing.mul(delegationPeriodManager.stakeMultipliers( delegations[delegationId].delegationPeriod)); _removeFromEffectiveDelegatedToValidator( delegations[delegationId].validatorId, effectiveAmount, delegations[delegationId].finished); _removeFromEffectiveDelegatedByHolderToValidator( delegations[delegationId].holder, delegations[delegationId].validatorId, effectiveAmount, delegations[delegationId].finished); tokenLaunchLocker.handleDelegationRemoving( delegations[delegationId].holder, delegationId, delegations[delegationId].finished); emit UndelegationRequested(delegationId); } /** * @dev Allows the Punisher to confiscate an `amount` of stake from * `validatorId` by slashing. This slashes all delegations of the validator, * which reduces the amount that the validator has staked. This consequence * may force the SKALE Manger to reduce the number of nodes a validator is * operating so the validator can meet the Minimum Staking Requirement. * * See Punisher. * * Emits a SlashingEvent. * * @param validatorId uint validator to slash * @param amount uint amount to slash * */ function confiscate(uint validatorId, uint amount) external allow("Punisher") { uint currentMonth = _getCurrentMonth(); FractionUtils.Fraction memory coefficient = _delegatedToValidator[validatorId].reduceValue(amount, currentMonth); _effectiveDelegatedToValidator[validatorId].reduceSequence(coefficient, currentMonth); _putToSlashingLog(_slashesOfValidator[validatorId], coefficient, currentMonth); _slashes.push(SlashingEvent({reducingCoefficient: coefficient, validatorId: validatorId, month: currentMonth})); } function getAndUpdateEffectiveDelegatedToValidator(uint validatorId, uint month) external allow("Distributor") returns (uint) { return _effectiveDelegatedToValidator[validatorId].getAndUpdateValueInSequence(month); } function getAndUpdateDelegatedByHolderToValidatorNow(address holder, uint validatorId) external returns (uint) { return _getAndUpdateDelegatedByHolderToValidator(holder, validatorId, _getCurrentMonth()); } function getDelegation(uint delegationId) external view checkDelegationExists(delegationId) returns (Delegation memory) { return delegations[delegationId]; } function getFirstDelegationMonth(address holder, uint validatorId) external view returns(uint) { return _firstDelegationMonth[holder].byValidator[validatorId]; } function getDelegationsByValidatorLength(uint validatorId) external view returns (uint) { return delegationsByValidator[validatorId].length; } function getDelegationsByHolderLength(address holder) external view returns (uint) { return delegationsByHolder[holder].length; } function initialize(address contractsAddress) public override initializer { Permissions.initialize(contractsAddress); } function getAndUpdateDelegatedToValidator(uint validatorId, uint month) public allow("Nodes") returns (uint) { return _delegatedToValidator[validatorId].getAndUpdateValue(month); } function processSlashes(address holder, uint limit) public { _sendSlashingSignals(_processSlashesWithoutSignals(holder, limit)); } function processAllSlashes(address holder) public { processSlashes(holder, 0); } /** * @dev Returns the token state of a given delegation. * * @param delegationId uint ID of the delegation */ function getState(uint delegationId) public view checkDelegationExists(delegationId) returns (State state) { if (delegations[delegationId].started == 0) { if (delegations[delegationId].finished == 0) { TimeHelpers timeHelpers = TimeHelpers(contractManager.getContract("TimeHelpers")); if (_getCurrentMonth() == timeHelpers.timestampToMonth(delegations[delegationId].created)) { return State.PROPOSED; } else { return State.REJECTED; } } else { return State.CANCELED; } } else { if (_getCurrentMonth() < delegations[delegationId].started) { return State.ACCEPTED; } else { if (delegations[delegationId].finished == 0) { return State.DELEGATED; } else { if (_getCurrentMonth() < delegations[delegationId].finished) { return State.UNDELEGATION_REQUESTED; } else { return State.COMPLETED; } } } } } function getLockedInPendingDelegations(address holder) public view returns (uint) { uint currentMonth = _getCurrentMonth(); if (_lockedInPendingDelegations[holder].month < currentMonth) { return 0; } else { return _lockedInPendingDelegations[holder].amount; } } function hasUnprocessedSlashes(address holder) public view returns (bool) { return _everDelegated(holder) && _firstUnprocessedSlashByHolder[holder] < _slashes.length; } // private function _addDelegation( address holder, uint validatorId, uint amount, uint delegationPeriod, string memory info ) private returns (uint delegationId) { delegationId = delegations.length; delegations.push(Delegation( holder, validatorId, amount, delegationPeriod, now, 0, 0, info )); delegationsByValidator[validatorId].push(delegationId); delegationsByHolder[holder].push(delegationId); _addToLockedInPendingDelegations(delegations[delegationId].holder, delegations[delegationId].amount); } function _calculateDelegationEndMonth(uint delegationId) private view returns (uint) { uint currentMonth = _getCurrentMonth(); uint started = delegations[delegationId].started; if (currentMonth < started) { return started.add(delegations[delegationId].delegationPeriod); } else { uint completedPeriods = currentMonth.sub(started).div(delegations[delegationId].delegationPeriod); return started.add(completedPeriods.add(1).mul(delegations[delegationId].delegationPeriod)); } } function _addToDelegatedToValidator(uint validatorId, uint amount, uint month) private { _delegatedToValidator[validatorId].addToValue(amount, month); } function _addToEffectiveDelegatedToValidator(uint validatorId, uint effectiveAmount, uint month) private { _effectiveDelegatedToValidator[validatorId].addToSequence(effectiveAmount, month); } function _addToDelegatedByHolder(address holder, uint amount, uint month) private { _delegatedByHolder[holder].addToValue(amount, month); } function _addToDelegatedByHolderToValidator( address holder, uint validatorId, uint amount, uint month) private { _delegatedByHolderToValidator[holder][validatorId].addToValue(amount, month); } function _addValidatorToValidatorsPerDelegators(address holder, uint validatorId) private { if (_numberOfValidatorsPerDelegator[holder].delegated[validatorId] == 0) { _numberOfValidatorsPerDelegator[holder].number = _numberOfValidatorsPerDelegator[holder].number.add(1); } _numberOfValidatorsPerDelegator[holder]. delegated[validatorId] = _numberOfValidatorsPerDelegator[holder].delegated[validatorId].add(1); } function _removeFromDelegatedByHolder(address holder, uint amount, uint month) private { _delegatedByHolder[holder].subtractFromValue(amount, month); } function _removeFromDelegatedByHolderToValidator( address holder, uint validatorId, uint amount, uint month) private { _delegatedByHolderToValidator[holder][validatorId].subtractFromValue(amount, month); } function _removeValidatorFromValidatorsPerDelegators(address holder, uint validatorId) private { if (_numberOfValidatorsPerDelegator[holder].delegated[validatorId] == 1) { _numberOfValidatorsPerDelegator[holder].number = _numberOfValidatorsPerDelegator[holder].number.sub(1); } _numberOfValidatorsPerDelegator[holder]. delegated[validatorId] = _numberOfValidatorsPerDelegator[holder].delegated[validatorId].sub(1); } function _addToEffectiveDelegatedByHolderToValidator( address holder, uint validatorId, uint effectiveAmount, uint month) private { _effectiveDelegatedByHolderToValidator[holder][validatorId].addToSequence(effectiveAmount, month); } function _removeFromEffectiveDelegatedByHolderToValidator( address holder, uint validatorId, uint effectiveAmount, uint month) private { _effectiveDelegatedByHolderToValidator[holder][validatorId].subtractFromSequence(effectiveAmount, month); } function _getAndUpdateDelegatedByHolder(address holder) private returns (uint) { uint currentMonth = _getCurrentMonth(); processAllSlashes(holder); return _delegatedByHolder[holder].getAndUpdateValue(currentMonth); } function _getAndUpdateDelegatedByHolderToValidator( address holder, uint validatorId, uint month) private returns (uint) { return _delegatedByHolderToValidator[holder][validatorId].getAndUpdateValue(month); } function _addToLockedInPendingDelegations(address holder, uint amount) private returns (uint) { uint currentMonth = _getCurrentMonth(); if (_lockedInPendingDelegations[holder].month < currentMonth) { _lockedInPendingDelegations[holder].amount = amount; _lockedInPendingDelegations[holder].month = currentMonth; } else { assert(_lockedInPendingDelegations[holder].month == currentMonth); _lockedInPendingDelegations[holder].amount = _lockedInPendingDelegations[holder].amount.add(amount); } } function _subtractFromLockedInPendingDelegations(address holder, uint amount) private returns (uint) { uint currentMonth = _getCurrentMonth(); require( _lockedInPendingDelegations[holder].month == currentMonth, "There are no delegation requests this month"); require(_lockedInPendingDelegations[holder].amount >= amount, "Unlocking amount is too big"); _lockedInPendingDelegations[holder].amount = _lockedInPendingDelegations[holder].amount.sub(amount); } function _getCurrentMonth() private view returns (uint) { TimeHelpers timeHelpers = TimeHelpers(contractManager.getContract("TimeHelpers")); return timeHelpers.getCurrentMonth(); } function _getAndUpdateLockedAmount(address wallet) private returns (uint) { return _getAndUpdateDelegatedByHolder(wallet).add(getLockedInPendingDelegations(wallet)); } function _updateFirstDelegationMonth(address holder, uint validatorId, uint month) private { if (_firstDelegationMonth[holder].value == 0) { _firstDelegationMonth[holder].value = month; _firstUnprocessedSlashByHolder[holder] = _slashes.length; } if (_firstDelegationMonth[holder].byValidator[validatorId] == 0) { _firstDelegationMonth[holder].byValidator[validatorId] = month; } } function _everDelegated(address holder) private view returns (bool) { return _firstDelegationMonth[holder].value > 0; } function _removeFromDelegatedToValidator(uint validatorId, uint amount, uint month) private { _delegatedToValidator[validatorId].subtractFromValue(amount, month); } function _removeFromEffectiveDelegatedToValidator(uint validatorId, uint effectiveAmount, uint month) private { _effectiveDelegatedToValidator[validatorId].subtractFromSequence(effectiveAmount, month); } function _calculateDelegationAmountAfterSlashing(uint delegationId) private view returns (uint) { uint startMonth = _delegationExtras[delegationId].lastSlashingMonthBeforeDelegation; uint validatorId = delegations[delegationId].validatorId; uint amount = delegations[delegationId].amount; if (startMonth == 0) { startMonth = _slashesOfValidator[validatorId].firstMonth; if (startMonth == 0) { return amount; } } for (uint i = startMonth; i > 0 && i < delegations[delegationId].finished; i = _slashesOfValidator[validatorId].slashes[i].nextMonth) { if (i >= delegations[delegationId].started) { amount = amount .mul(_slashesOfValidator[validatorId].slashes[i].reducingCoefficient.numerator) .div(_slashesOfValidator[validatorId].slashes[i].reducingCoefficient.denominator); } } return amount; } function _putToSlashingLog( SlashingLog storage log, FractionUtils.Fraction memory coefficient, uint month) private { if (log.firstMonth == 0) { log.firstMonth = month; log.lastMonth = month; log.slashes[month].reducingCoefficient = coefficient; log.slashes[month].nextMonth = 0; } else { require(log.lastMonth <= month, "Cannot put slashing event in the past"); if (log.lastMonth == month) { log.slashes[month].reducingCoefficient = log.slashes[month].reducingCoefficient.multiplyFraction(coefficient); } else { log.slashes[month].reducingCoefficient = coefficient; log.slashes[month].nextMonth = 0; log.slashes[log.lastMonth].nextMonth = month; log.lastMonth = month; } } } function _processSlashesWithoutSignals(address holder, uint limit) private returns (SlashingSignal[] memory slashingSignals) { if (hasUnprocessedSlashes(holder)) { uint index = _firstUnprocessedSlashByHolder[holder]; uint end = _slashes.length; if (limit > 0 && index.add(limit) < end) { end = index.add(limit); } slashingSignals = new SlashingSignal[](end.sub(index)); uint begin = index; for (; index < end; ++index) { uint validatorId = _slashes[index].validatorId; uint month = _slashes[index].month; uint oldValue = _getAndUpdateDelegatedByHolderToValidator(holder, validatorId, month); if (oldValue.muchGreater(0)) { _delegatedByHolderToValidator[holder][validatorId].reduceValueByCoefficientAndUpdateSum( _delegatedByHolder[holder], _slashes[index].reducingCoefficient, month); _effectiveDelegatedByHolderToValidator[holder][validatorId].reduceSequence( _slashes[index].reducingCoefficient, month); slashingSignals[index.sub(begin)].holder = holder; slashingSignals[index.sub(begin)].penalty = oldValue.boundedSub(_getAndUpdateDelegatedByHolderToValidator(holder, validatorId, month)); } } _firstUnprocessedSlashByHolder[holder] = end; } } function _processAllSlashesWithoutSignals(address holder) private returns (SlashingSignal[] memory slashingSignals) { return _processSlashesWithoutSignals(holder, 0); } function _sendSlashingSignals(SlashingSignal[] memory slashingSignals) private { Punisher punisher = Punisher(contractManager.getContract("Punisher")); address previousHolder = address(0); uint accumulatedPenalty = 0; for (uint i = 0; i < slashingSignals.length; ++i) { if (slashingSignals[i].holder != previousHolder) { if (accumulatedPenalty > 0) { punisher.handleSlash(previousHolder, accumulatedPenalty); } previousHolder = slashingSignals[i].holder; accumulatedPenalty = slashingSignals[i].penalty; } else { accumulatedPenalty = accumulatedPenalty.add(slashingSignals[i].penalty); } } if (accumulatedPenalty > 0) { punisher.handleSlash(previousHolder, accumulatedPenalty); } } function _addToAllStatistics(uint delegationId) private { DelegationPeriodManager delegationPeriodManager = DelegationPeriodManager( contractManager.getContract("DelegationPeriodManager")); uint currentMonth = _getCurrentMonth(); delegations[delegationId].started = currentMonth.add(1); if (_slashesOfValidator[delegations[delegationId].validatorId].lastMonth > 0) { _delegationExtras[delegationId].lastSlashingMonthBeforeDelegation = _slashesOfValidator[delegations[delegationId].validatorId].lastMonth; } _addToDelegatedToValidator( delegations[delegationId].validatorId, delegations[delegationId].amount, currentMonth.add(1)); _addToDelegatedByHolder( delegations[delegationId].holder, delegations[delegationId].amount, currentMonth.add(1)); _addToDelegatedByHolderToValidator( delegations[delegationId].holder, delegations[delegationId].validatorId, delegations[delegationId].amount, currentMonth.add(1)); _updateFirstDelegationMonth( delegations[delegationId].holder, delegations[delegationId].validatorId, currentMonth.add(1)); uint effectiveAmount = delegations[delegationId].amount.mul(delegationPeriodManager.stakeMultipliers( delegations[delegationId].delegationPeriod)); _addToEffectiveDelegatedToValidator( delegations[delegationId].validatorId, effectiveAmount, currentMonth.add(1)); _addToEffectiveDelegatedByHolderToValidator( delegations[delegationId].holder, delegations[delegationId].validatorId, effectiveAmount, currentMonth.add(1)); _addValidatorToValidatorsPerDelegators( delegations[delegationId].holder, delegations[delegationId].validatorId ); } function _checkIfDelegationIsAllowed(address holder, uint validatorId) private view returns (bool) { ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); require( _numberOfValidatorsPerDelegator[holder].delegated[validatorId] > 0 || ( _numberOfValidatorsPerDelegator[holder].delegated[validatorId] == 0 && _numberOfValidatorsPerDelegator[holder].number < constantsHolder.limitValidatorsPerDelegator() ), "Limit of validators is reached" ); require( _getCurrentMonth() >= constantsHolder.firstDelegationsMonth(), "Delegations are not allowed" ); } } contract DelegationPeriodManager is Permissions { /** * @dev Emitted when a new delegation period is specified. */ event DelegationPeriodWasSet( uint length, uint stakeMultiplier ); mapping (uint => uint) public stakeMultipliers; /** * @dev Creates a new available delegation period and return in the network. * Only the owner may set new delegation period and returns in the network. * * Emits a DelegationPeriodWasSet event. * * @param monthsCount uint delegation duration in months * @param stakeMultiplier uint return for delegation */ function setDelegationPeriod(uint monthsCount, uint stakeMultiplier) external onlyOwner { stakeMultipliers[monthsCount] = stakeMultiplier; emit DelegationPeriodWasSet(monthsCount, stakeMultiplier); } /** * @dev Checks whether given delegation period is allowed. * * @param monthsCount uint delegation duration in months * @return bool True if delegation period is allowed */ function isDelegationPeriodAllowed(uint monthsCount) external view returns (bool) { return stakeMultipliers[monthsCount] != 0 ? true : false; } /** * @dev Initial delegation period and multiplier settings. */ function initialize(address contractsAddress) public override initializer { Permissions.initialize(contractsAddress); stakeMultipliers[3] = 100; // 3 months at 100 // stakeMultipliers[6] = 150; // 6 months at 150 // stakeMultipliers[12] = 200; // 12 months at 200 } } contract Nodes is Permissions { using SafeCast for uint; // All Nodes states enum NodeStatus {Active, Leaving, Left, In_Maintenance} struct Node { string name; bytes4 ip; bytes4 publicIP; uint16 port; bytes32[2] publicKey; uint startBlock; uint lastRewardDate; uint finishTime; NodeStatus status; uint validatorId; } // struct to note which Nodes and which number of Nodes owned by user struct CreatedNodes { mapping (uint => bool) isNodeExist; uint numberOfNodes; } struct SpaceManaging { uint8 freeSpace; uint indexInSpaceMap; } // TODO: move outside the contract struct NodeCreationParams { string name; bytes4 ip; bytes4 publicIp; uint16 port; bytes32[2] publicKey; uint16 nonce; } // array which contain all Nodes Node[] public nodes; SpaceManaging[] public spaceOfNodes; // mapping for checking which Nodes and which number of Nodes owned by user mapping (address => CreatedNodes) public nodeIndexes; // mapping for checking is IP address busy mapping (bytes4 => bool) public nodesIPCheck; // mapping for checking is Name busy mapping (bytes32 => bool) public nodesNameCheck; // mapping for indication from Name to Index mapping (bytes32 => uint) public nodesNameToIndex; // mapping for indication from space to Nodes mapping (uint8 => uint[]) public spaceToNodes; mapping (uint => uint[]) public validatorToNodeIndexes; uint public numberOfActiveNodes; uint public numberOfLeavingNodes; uint public numberOfLeftNodes; // informs that Node is created event NodeCreated( uint nodeIndex, address owner, string name, bytes4 ip, bytes4 publicIP, uint16 port, uint16 nonce, uint time, uint gasSpend ); // informs that node is fully finished quitting from the system event ExitCompleted( uint nodeIndex, uint time, uint gasSpend ); // informs that owner starts the procedure of quitting the Node from the system event ExitInited( uint nodeIndex, uint startLeavingPeriod, uint time, uint gasSpend ); modifier checkNodeExists(uint nodeIndex) { require(nodeIndex < nodes.length, "Node with such index does not exist"); _; } /** * @dev removeSpaceFromFractionalNode - occupies space from Fractional Node * function could be run only by Schains * @param nodeIndex - index of Node at array of Fractional Nodes * @param space - space which should be occupied */ function removeSpaceFromNode(uint nodeIndex, uint8 space) external checkNodeExists(nodeIndex) allowTwo("NodeRotation", "SchainsInternal") returns (bool) { if (spaceOfNodes[nodeIndex].freeSpace < space) { return false; } if (space > 0) { _moveNodeToNewSpaceMap( nodeIndex, uint(spaceOfNodes[nodeIndex].freeSpace).sub(space).toUint8() ); } return true; } /** * @dev adSpaceToFractionalNode - returns space to Fractional Node * function could be run only be Schains * @param nodeIndex - index of Node at array of Fractional Nodes * @param space - space which should be returned */ function addSpaceToNode(uint nodeIndex, uint8 space) external checkNodeExists(nodeIndex) allow("Schains") { if (space > 0) { _moveNodeToNewSpaceMap( nodeIndex, uint(spaceOfNodes[nodeIndex].freeSpace).add(space).toUint8() ); } } /** * @dev changeNodeLastRewardDate - changes Node's last reward date * function could be run only by SkaleManager * @param nodeIndex - index of Node */ function changeNodeLastRewardDate(uint nodeIndex) external checkNodeExists(nodeIndex) allow("SkaleManager") { nodes[nodeIndex].lastRewardDate = block.timestamp; } function changeNodeFinishTime(uint nodeIndex, uint time) external checkNodeExists(nodeIndex) allow("SkaleManager") { nodes[nodeIndex].finishTime = time; } /** * @dev createNode - creates new Node and add it to the Nodes contract * function could be only run by SkaleManager * @param from - owner of Node */ // * @return nodeIndex - index of Node function createNode(address from, NodeCreationParams calldata params) external allow("SkaleManager") // returns (uint nodeIndex) { // checks that Node has correct data require(params.ip != 0x0 && !nodesIPCheck[params.ip], "IP address is zero or is not available"); require(!nodesNameCheck[keccak256(abi.encodePacked(params.name))], "Name has already registered"); require(params.port > 0, "Port is zero"); uint validatorId = ValidatorService( contractManager.getContract("ValidatorService")).getValidatorIdByNodeAddress(from); // adds Node to Nodes contract uint nodeIndex = _addNode( from, params.name, params.ip, params.publicIp, params.port, params.publicKey, validatorId); emit NodeCreated( nodeIndex, from, params.name, params.ip, params.publicIp, params.port, params.nonce, block.timestamp, gasleft()); } /** * @dev initExit - initiate a procedure of quitting the system * function could be only run by SkaleManager * @param nodeIndex - index of Node * @return true - if everything OK */ function initExit(uint nodeIndex) external checkNodeExists(nodeIndex) allow("SkaleManager") returns (bool) { _setNodeLeaving(nodeIndex); emit ExitInited( nodeIndex, block.timestamp, block.timestamp, gasleft()); return true; } /** * @dev completeExit - finish a procedure of quitting the system * function could be run only by SkaleManager * @param nodeIndex - index of Node * @return amount of SKL which be returned */ function completeExit(uint nodeIndex) external checkNodeExists(nodeIndex) allow("SkaleManager") returns (bool) { require(isNodeLeaving(nodeIndex), "Node is not Leaving"); _setNodeLeft(nodeIndex); _deleteNode(nodeIndex); emit ExitCompleted( nodeIndex, block.timestamp, gasleft()); return true; } function deleteNodeForValidator(uint validatorId, uint nodeIndex) external checkNodeExists(nodeIndex) allow("SkaleManager") { ValidatorService validatorService = ValidatorService(contractManager.getContract("ValidatorService")); require(validatorService.validatorExists(validatorId), "Validator with such ID does not exist"); uint[] memory validatorNodes = validatorToNodeIndexes[validatorId]; uint position = _findNode(validatorNodes, nodeIndex); if (position < validatorNodes.length) { validatorToNodeIndexes[validatorId][position] = validatorToNodeIndexes[validatorId][validatorNodes.length.sub(1)]; } validatorToNodeIndexes[validatorId].pop(); } function checkPossibilityCreatingNode(address nodeAddress) external allow("SkaleManager") { ValidatorService validatorService = ValidatorService(contractManager.getContract("ValidatorService")); DelegationController delegationController = DelegationController( contractManager.getContract("DelegationController") ); uint validatorId = validatorService.getValidatorIdByNodeAddress(nodeAddress); require(validatorService.isAuthorizedValidator(validatorId), "Validator is not authorized to create a node"); uint[] memory validatorNodes = validatorToNodeIndexes[validatorId]; uint delegationsTotal = delegationController.getAndUpdateDelegatedToValidatorNow(validatorId); uint msr = ConstantsHolder(contractManager.getContract("ConstantsHolder")).msr(); require( validatorNodes.length.add(1).mul(msr) <= delegationsTotal, "Validator must meet the Minimum Staking Requirement"); } function checkPossibilityToMaintainNode( uint validatorId, uint nodeIndex ) external checkNodeExists(nodeIndex) allow("Bounty") returns (bool) { DelegationController delegationController = DelegationController( contractManager.getContract("DelegationController") ); ValidatorService validatorService = ValidatorService(contractManager.getContract("ValidatorService")); require(validatorService.validatorExists(validatorId), "Validator with such ID does not exist"); uint[] memory validatorNodes = validatorToNodeIndexes[validatorId]; uint position = _findNode(validatorNodes, nodeIndex); require(position < validatorNodes.length, "Node does not exist for this Validator"); uint delegationsTotal = delegationController.getAndUpdateDelegatedToValidatorNow(validatorId); uint msr = ConstantsHolder(contractManager.getContract("ConstantsHolder")).msr(); return position.add(1).mul(msr) <= delegationsTotal; } function setNodeInMaintenance(uint nodeIndex) external { require(nodes[nodeIndex].status == NodeStatus.Active, "Node is not Active"); ValidatorService validatorService = ValidatorService(contractManager.getContract("ValidatorService")); uint validatorId = getValidatorId(nodeIndex); bool permitted = (_isOwner() || isNodeExist(msg.sender, nodeIndex)); if (!permitted) { permitted = validatorService.getValidatorId(msg.sender) == validatorId; } require(permitted, "Sender is not permitted to call this function"); nodes[nodeIndex].status = NodeStatus.In_Maintenance; } function removeNodeFromInMaintenance(uint nodeIndex) external { require(nodes[nodeIndex].status == NodeStatus.In_Maintenance, "Node is not In Maintence"); ValidatorService validatorService = ValidatorService(contractManager.getContract("ValidatorService")); uint validatorId = getValidatorId(nodeIndex); bool permitted = (_isOwner() || isNodeExist(msg.sender, nodeIndex)); if (!permitted) { permitted = validatorService.getValidatorId(msg.sender) == validatorId; } require(permitted, "Sender is not permitted to call this function"); nodes[nodeIndex].status = NodeStatus.Active; } function getNodesWithFreeSpace(uint8 freeSpace) external view returns (uint[] memory) { ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); uint[] memory nodesWithFreeSpace = new uint[](countNodesWithFreeSpace(freeSpace)); uint cursor = 0; uint totalSpace = constantsHolder.TOTAL_SPACE_ON_NODE(); for (uint8 i = freeSpace; i <= totalSpace; ++i) { for (uint j = 0; j < spaceToNodes[i].length; j++) { nodesWithFreeSpace[cursor] = spaceToNodes[i][j]; ++cursor; } } return nodesWithFreeSpace; } /** * @dev isTimeForReward - checks if time for reward has come * @param nodeIndex - index of Node * @return if time for reward has come - true, else - false */ function isTimeForReward(uint nodeIndex) external view checkNodeExists(nodeIndex) returns (bool) { ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); return uint(nodes[nodeIndex].lastRewardDate).add(constantsHolder.rewardPeriod()) <= block.timestamp; } /** * @dev getNodeIP - get ip address of Node * @param nodeIndex - index of Node * @return ip address */ function getNodeIP(uint nodeIndex) external view checkNodeExists(nodeIndex) returns (bytes4) { require(nodeIndex < nodes.length, "Node does not exist"); return nodes[nodeIndex].ip; } /** * @dev getNodePort - get Node's port * @param nodeIndex - index of Node * @return port */ function getNodePort(uint nodeIndex) external view checkNodeExists(nodeIndex) returns (uint16) { return nodes[nodeIndex].port; } function getNodePublicKey(uint nodeIndex) external view checkNodeExists(nodeIndex) returns (bytes32[2] memory) { return nodes[nodeIndex].publicKey; } function getNodeFinishTime(uint nodeIndex) external view checkNodeExists(nodeIndex) returns (uint) { return nodes[nodeIndex].finishTime; } /** * @dev isNodeLeft - checks if Node status Left * @param nodeIndex - index of Node * @return if Node status Left - true, else - false */ function isNodeLeft(uint nodeIndex) external view checkNodeExists(nodeIndex) returns (bool) { return nodes[nodeIndex].status == NodeStatus.Left; } function isNodeInMaintenance(uint nodeIndex) external view checkNodeExists(nodeIndex) returns (bool) { return nodes[nodeIndex].status == NodeStatus.In_Maintenance; } /** * @dev getNodeLastRewardDate - get Node last reward date * @param nodeIndex - index of Node * @return Node last reward date */ function getNodeLastRewardDate(uint nodeIndex) external view checkNodeExists(nodeIndex) returns (uint) { return nodes[nodeIndex].lastRewardDate; } /** * @dev getNodeNextRewardDate - get Node next reward date * @param nodeIndex - index of Node * @return Node next reward date */ function getNodeNextRewardDate(uint nodeIndex) external view checkNodeExists(nodeIndex) returns (uint) { ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); return nodes[nodeIndex].lastRewardDate.add(constantsHolder.rewardPeriod()); } /** * @dev getNumberOfNodes - get number of Nodes * @return number of Nodes */ function getNumberOfNodes() external view returns (uint) { return nodes.length; } /** * @dev getNumberOfFullNodes - get number Online Nodes * @return number of active nodes plus number of leaving nodes */ function getNumberOnlineNodes() external view returns (uint) { return numberOfActiveNodes.add(numberOfLeavingNodes); } /** * @dev getActiveNodeIPs - get array of ips of Active Nodes * @return activeNodeIPs - array of ips of Active Nodes */ function getActiveNodeIPs() external view returns (bytes4[] memory activeNodeIPs) { activeNodeIPs = new bytes4[](numberOfActiveNodes); uint indexOfActiveNodeIPs = 0; for (uint indexOfNodes = 0; indexOfNodes < nodes.length; indexOfNodes++) { if (isNodeActive(indexOfNodes)) { activeNodeIPs[indexOfActiveNodeIPs] = nodes[indexOfNodes].ip; indexOfActiveNodeIPs++; } } } /** * @dev getActiveNodesByAddress - get array of indexes of Active Nodes, which were * created by msg.sender * @return activeNodesByAddress Array of indexes of Active Nodes, which were created by msg.sender */ function getActiveNodesByAddress() external view returns (uint[] memory activeNodesByAddress) { activeNodesByAddress = new uint[](nodeIndexes[msg.sender].numberOfNodes); uint indexOfActiveNodesByAddress = 0; for (uint indexOfNodes = 0; indexOfNodes < nodes.length; indexOfNodes++) { if (nodeIndexes[msg.sender].isNodeExist[indexOfNodes] && isNodeActive(indexOfNodes)) { activeNodesByAddress[indexOfActiveNodesByAddress] = indexOfNodes; indexOfActiveNodesByAddress++; } } } /** * @dev getActiveNodeIds - get array of indexes of Active Nodes * @return activeNodeIds - array of indexes of Active Nodes */ function getActiveNodeIds() external view returns (uint[] memory activeNodeIds) { activeNodeIds = new uint[](numberOfActiveNodes); uint indexOfActiveNodeIds = 0; for (uint indexOfNodes = 0; indexOfNodes < nodes.length; indexOfNodes++) { if (isNodeActive(indexOfNodes)) { activeNodeIds[indexOfActiveNodeIds] = indexOfNodes; indexOfActiveNodeIds++; } } } function getNodeStatus(uint nodeIndex) external view checkNodeExists(nodeIndex) returns (NodeStatus) { return nodes[nodeIndex].status; } function getValidatorNodeIndexes(uint validatorId) external view returns (uint[] memory) { ValidatorService validatorService = ValidatorService(contractManager.getContract("ValidatorService")); require(validatorService.validatorExists(validatorId), "Validator with such ID does not exist"); return validatorToNodeIndexes[validatorId]; } /** * @dev constructor in Permissions approach * @param contractsAddress needed in Permissions constructor */ function initialize(address contractsAddress) public override initializer { Permissions.initialize(contractsAddress); numberOfActiveNodes = 0; numberOfLeavingNodes = 0; numberOfLeftNodes = 0; } function getValidatorId(uint nodeIndex) public view checkNodeExists(nodeIndex) returns (uint) { return nodes[nodeIndex].validatorId; } /** * @dev isNodeExist - checks existence of Node at this address * @param from - account address * @param nodeIndex - index of Node * @return if exist - true, else - false */ function isNodeExist(address from, uint nodeIndex) public view checkNodeExists(nodeIndex) returns (bool) { return nodeIndexes[from].isNodeExist[nodeIndex]; } /** * @dev isNodeActive - checks if Node status Active * @param nodeIndex - index of Node * @return if Node status Active - true, else - false */ function isNodeActive(uint nodeIndex) public view checkNodeExists(nodeIndex) returns (bool) { return nodes[nodeIndex].status == NodeStatus.Active; } /** * @dev isNodeLeaving - checks if Node status Leaving * @param nodeIndex - index of Node * @return if Node status Leaving - true, else - false */ function isNodeLeaving(uint nodeIndex) public view checkNodeExists(nodeIndex) returns (bool) { return nodes[nodeIndex].status == NodeStatus.Leaving; } function countNodesWithFreeSpace(uint8 freeSpace) public view returns (uint count) { ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); count = 0; uint totalSpace = constantsHolder.TOTAL_SPACE_ON_NODE(); for (uint8 i = freeSpace; i <= totalSpace; ++i) { count = count.add(spaceToNodes[i].length); } } function _findNode(uint[] memory validatorNodeIndexes, uint nodeIndex) private pure returns (uint) { uint i; for (i = 0; i < validatorNodeIndexes.length; i++) { if (validatorNodeIndexes[i] == nodeIndex) { return i; } } return validatorNodeIndexes.length; } function _moveNodeToNewSpaceMap(uint nodeIndex, uint8 newSpace) private { uint8 previousSpace = spaceOfNodes[nodeIndex].freeSpace; uint indexInArray = spaceOfNodes[nodeIndex].indexInSpaceMap; if (indexInArray < spaceToNodes[previousSpace].length.sub(1)) { uint shiftedIndex = spaceToNodes[previousSpace][spaceToNodes[previousSpace].length.sub(1)]; spaceToNodes[previousSpace][indexInArray] = shiftedIndex; spaceOfNodes[shiftedIndex].indexInSpaceMap = indexInArray; spaceToNodes[previousSpace].pop(); } else { spaceToNodes[previousSpace].pop(); } spaceToNodes[newSpace].push(nodeIndex); spaceOfNodes[nodeIndex].freeSpace = newSpace; spaceOfNodes[nodeIndex].indexInSpaceMap = spaceToNodes[newSpace].length.sub(1); } /** * @dev _setNodeLeft - set Node Left * function could be run only by Nodes * @param nodeIndex - index of Node */ function _setNodeLeft(uint nodeIndex) private { nodesIPCheck[nodes[nodeIndex].ip] = false; nodesNameCheck[keccak256(abi.encodePacked(nodes[nodeIndex].name))] = false; delete nodesNameToIndex[keccak256(abi.encodePacked(nodes[nodeIndex].name))]; if (nodes[nodeIndex].status == NodeStatus.Active) { numberOfActiveNodes--; } else { numberOfLeavingNodes--; } nodes[nodeIndex].status = NodeStatus.Left; numberOfLeftNodes++; } /** * @dev _setNodeLeaving - set Node Leaving * function could be run only by Nodes * @param nodeIndex - index of Node */ function _setNodeLeaving(uint nodeIndex) private { nodes[nodeIndex].status = NodeStatus.Leaving; numberOfActiveNodes--; numberOfLeavingNodes++; } /** * @dev _addNode - adds Node to array * function could be run only by executor * @param from - owner of Node * @param name - Node name * @param ip - Node ip * @param publicIP - Node public ip * @param port - Node public port * @param publicKey - Ethereum public key * @return nodeIndex Index of Node */ function _addNode( address from, string memory name, bytes4 ip, bytes4 publicIP, uint16 port, bytes32[2] memory publicKey, uint validatorId ) private returns (uint nodeIndex) { ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); nodes.push(Node({ name: name, ip: ip, publicIP: publicIP, port: port, //owner: from, publicKey: publicKey, startBlock: block.number, lastRewardDate: block.timestamp, finishTime: 0, status: NodeStatus.Active, validatorId: validatorId })); nodeIndex = nodes.length.sub(1); validatorToNodeIndexes[validatorId].push(nodeIndex); bytes32 nodeId = keccak256(abi.encodePacked(name)); nodesIPCheck[ip] = true; nodesNameCheck[nodeId] = true; nodesNameToIndex[nodeId] = nodeIndex; nodeIndexes[from].isNodeExist[nodeIndex] = true; nodeIndexes[from].numberOfNodes++; spaceOfNodes.push(SpaceManaging({ freeSpace: constantsHolder.TOTAL_SPACE_ON_NODE(), indexInSpaceMap: spaceToNodes[constantsHolder.TOTAL_SPACE_ON_NODE()].length })); spaceToNodes[constantsHolder.TOTAL_SPACE_ON_NODE()].push(nodeIndex); numberOfActiveNodes++; } function _deleteNode(uint nodeIndex) private { uint8 space = spaceOfNodes[nodeIndex].freeSpace; uint indexInArray = spaceOfNodes[nodeIndex].indexInSpaceMap; if (indexInArray < spaceToNodes[space].length.sub(1)) { uint shiftedIndex = spaceToNodes[space][spaceToNodes[space].length.sub(1)]; spaceToNodes[space][indexInArray] = shiftedIndex; spaceOfNodes[shiftedIndex].indexInSpaceMap = indexInArray; spaceToNodes[space].pop(); } else { spaceToNodes[space].pop(); } delete spaceOfNodes[nodeIndex].freeSpace; delete spaceOfNodes[nodeIndex].indexInSpaceMap; } }

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{"success": true, "error": null, "results": {"detectors": [{"check": "write-after-write", "impact": "Medium", "confidence": "High"}, {"check": "divide-before-multiply", "impact": "Medium", "confidence": "Medium"}, {"check": "incorrect-equality", "impact": "Medium", "confidence": "High"}, {"check": "reentrancy-no-eth", "impact": "Medium", "confidence": "Medium"}]}}

0x7B37b0752468A246c6bD7Ad74fB6326c50793c59

pragma solidity 0.6.6; abstract contract Context { function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } contract ERC20 is Context, IERC20 { using SafeMath for uint256; mapping (address => uint256) private _balances; mapping (address => mapping (address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; uint8 private _decimals; /** * @dev Sets the values for {name} and {symbol}, initializes {decimals} with * a default value of 18. * * To select a different value for {decimals}, use {_setupDecimals}. * * All three of these values are immutable: they can only be set once during * construction. */ constructor (string memory name, string memory symbol) public { _name = name; _symbol = symbol; _decimals = 8; } /** * @dev Returns the name of the token. */ function name() public view returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5,05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is * called. * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view returns (uint8) { return _decimals; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `recipient` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address recipient, uint256 amount) public virtual override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { _approve(_msgSender(), spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}. * * Requirements: * * - `sender` and `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. * - the caller must have allowance for ``sender``'s tokens of at least * `amount`. */ function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) { _transfer(sender, recipient, amount); _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance")); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue)); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero")); return true; } /** * @dev Moves tokens `amount` from `sender` to `recipient`. * * This is internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `sender` cannot be the zero address. * - `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. */ function _transfer(address sender, address recipient, uint256 amount) internal virtual { require(sender != address(0), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(sender, recipient, amount); _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance"); _balances[recipient] = _balances[recipient].add(amount); emit Transfer(sender, recipient, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements: * * - `to` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply = _totalSupply.add(amount); _balances[account] = _balances[account].add(amount); emit Transfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance"); _totalSupply = _totalSupply.sub(amount); emit Transfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens. * * This internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve(address owner, address spender, uint256 amount) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Sets {decimals} to a value other than the default one of 18. * * WARNING: This function should only be called from the constructor. Most * applications that interact with token contracts will not expect * {decimals} to ever change, and may work incorrectly if it does. */ function _setupDecimals(uint8 decimals_) internal { _decimals = decimals_; } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be to transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { } } contract Vela is ERC20 { constructor() public ERC20("Vela", "Vela") { _mint(msg.sender, 100000000*(10**uint256(decimals()))); } }

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0x7b49bc65df4118e334860767ff26a1ece6fcaa02

pragma solidity 0.7.4; contract LYNCToken { //Enable SafeMath using SafeMath for uint256; //Token details string constant public name = "LYNC Network"; string constant public symbol = "LYNC"; uint8 constant public decimals = 18; //Reward pool and owner address address public owner; address public rewardPoolAddress; //Supply and tranasction fee uint256 public maxTokenSupply = 1e24; // 1,000,000 tokens uint256 public feePercent = 1; // initial transaction fee percentage uint256 public feePercentMax = 10; // maximum transaction fee percentage //Events event Transfer(address indexed _from, address indexed _to, uint256 _tokens); event Approval(address indexed _owner,address indexed _spender, uint256 _tokens); event TranserFee(uint256 _tokens); event UpdateFee(uint256 _fee); event RewardPoolUpdated(address indexed _rewardPoolAddress, address indexed _newRewardPoolAddress); event OwnershipTransferred(address indexed _previousOwner, address indexed _newOwner); event OwnershipRenounced(address indexed _previousOwner, address indexed _newOwner); //Mappings mapping(address => uint256) public balanceOf; mapping(address => mapping(address => uint256)) private allowances; //On deployment constructor () { owner = msg.sender; rewardPoolAddress = address(this); balanceOf[msg.sender] = maxTokenSupply; emit Transfer(address(0), msg.sender, maxTokenSupply); } //ERC20 totalSupply function totalSupply() public view returns (uint256) { return maxTokenSupply; } //ERC20 transfer function transfer(address _to, uint256 _tokens) public returns (bool) { transferWithFee(msg.sender, _to, _tokens); return true; } //ERC20 transferFrom function transferFrom(address _from, address _to, uint256 _tokens) public returns (bool) { require(_tokens <= balanceOf[_from], "Not enough tokens in the approved address balance"); require(_tokens <= allowances[_from][msg.sender], "token amount is larger than the current allowance"); transferWithFee(_from, _to, _tokens); allowances[_from][msg.sender] = allowances[_from][msg.sender].sub(_tokens); return true; } //ERC20 approve function approve(address _spender, uint256 _tokens) public returns (bool) { allowances[msg.sender][_spender] = _tokens; emit Approval(msg.sender, _spender, _tokens); return true; } //ERC20 allowance function allowance(address _owner, address _spender) public view returns (uint256) { return allowances[_owner][_spender]; } //Transfer with transaction fee applied function transferWithFee(address _from, address _to, uint256 _tokens) internal returns (bool) { require(balanceOf[_from] >= _tokens, "Not enough tokens in the senders balance"); uint256 _feeAmount = (_tokens.mul(feePercent)).div(100); balanceOf[_from] = balanceOf[_from].sub(_tokens); balanceOf[_to] = balanceOf[_to].add(_tokens.sub(_feeAmount)); balanceOf[rewardPoolAddress] = balanceOf[rewardPoolAddress].add(_feeAmount); emit Transfer(_from, _to, _tokens.sub(_feeAmount)); emit Transfer(_from, rewardPoolAddress, _feeAmount); emit TranserFee(_tokens); return true; } //Update transaction fee percentage function updateFee(uint256 _updateFee) public onlyOwner { require(_updateFee <= feePercentMax, "Transaction fee cannot be greater than 10%"); feePercent = _updateFee; emit UpdateFee(_updateFee); } //Update the reward pool address function updateRewardPool(address _newRewardPoolAddress) public onlyOwner { require(_newRewardPoolAddress != address(0), "New reward pool address cannot be a zero address"); rewardPoolAddress = _newRewardPoolAddress; emit RewardPoolUpdated(rewardPoolAddress, _newRewardPoolAddress); } //Transfer current token balance to the reward pool address function rewardPoolBalanceTransfer() public onlyOwner returns (bool) { uint256 _currentBalance = balanceOf[address(this)]; transferWithFee(address(this), rewardPoolAddress, _currentBalance); return true; } //Transfer ownership to new owner function transferOwnership(address _newOwner) public onlyOwner { require(_newOwner != address(0), "New owner cannot be a zero address"); emit OwnershipTransferred(owner, _newOwner); owner = _newOwner; } //Remove owner from the contract function renounceOwnership() public onlyOwner { emit OwnershipRenounced(owner, address(0)); owner = address(0); } //Modifiers modifier onlyOwner() { require(owner == msg.sender, "Only current owner can call this function"); _; } } contract LYNCTokenLock { //Enable SafeMath using SafeMath for uint256; address public owner; address public contractAddress; uint256 public oneDay = 86400; // in seconds uint256 public currentLockTimer; // in seconds LYNCToken public tokenContract; //Events event OwnershipTransferred(address indexed _previousOwner, address indexed _newOwner); event OwnershipRenounced(address indexed _previousOwner, address indexed _newOwner); //On deployment constructor(LYNCToken _tokenContract) { owner = msg.sender; tokenContract = _tokenContract; contractAddress = address(this); currentLockTimer = block.timestamp; } //Withdraw tokens function withdrawTokens(uint256 _numberOfTokens) public onlyOwner { require(block.timestamp > currentLockTimer, "Tokens are currently locked even to the contract admin"); require(tokenContract.transfer(msg.sender, _numberOfTokens)); } //Increase lock duration in days function increaseLock(uint256 _numberOfDays) public onlyOwner { uint256 _increaseLockDays = _numberOfDays.mul(oneDay); currentLockTimer = currentLockTimer.add(_increaseLockDays); } //Transfer ownership to new owner function transferOwnership(address _newOwner) public onlyOwner { require(_newOwner != address(0), "New owner cannot be a zero address"); emit OwnershipTransferred(owner, _newOwner); owner = _newOwner; } //Remove owner from the contract function renounceOwnership() public onlyOwner { emit OwnershipRenounced(owner, address(0)); owner = address(0); } //Modifiers modifier onlyOwner() { require(owner == msg.sender, "Only current owner can call this function"); _; } } library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { // Solidity only automatically asserts when dividing by 0 require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } }

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0x7b856af5753a9f80968EA002641E69AdF1d795aB

pragma solidity 0.6.12; pragma experimental ABIEncoderV2; contract DSAuthEvents { event LogSetAuthority(address indexed authority); event LogSetOwner(address indexed owner); } contract DSAuth is DSAuthEvents { DSAuthority public authority; address public owner; constructor() public { owner = msg.sender; emit LogSetOwner(msg.sender); } function setOwner(address owner_) public auth { owner = owner_; emit LogSetOwner(owner); } function setAuthority(DSAuthority authority_) public auth { authority = authority_; emit LogSetAuthority(address(authority)); } modifier auth { require(isAuthorized(msg.sender, msg.sig)); _; } function isAuthorized(address src, bytes4 sig) internal view returns (bool) { if (src == address(this)) { return true; } else if (src == owner) { return true; } else if (authority == DSAuthority(0)) { return false; } else { return authority.canCall(src, address(this), sig); } } } abstract contract DSAuthority { function canCall(address src, address dst, bytes4 sig) public virtual view returns (bool); } abstract contract DSGuard { function canCall(address src_, address dst_, bytes4 sig) public view virtual returns (bool); function permit(bytes32 src, bytes32 dst, bytes32 sig) public virtual; function forbid(bytes32 src, bytes32 dst, bytes32 sig) public virtual; function permit(address src, address dst, bytes32 sig) public virtual; function forbid(address src, address dst, bytes32 sig) public virtual; } abstract contract DSGuardFactory { function newGuard() public virtual returns (DSGuard guard); } contract DSMath { function add(uint256 x, uint256 y) internal pure returns (uint256 z) { require((z = x + y) >= x); } function sub(uint256 x, uint256 y) internal pure returns (uint256 z) { require((z = x - y) <= x); } function mul(uint256 x, uint256 y) internal pure returns (uint256 z) { require(y == 0 || (z = x * y) / y == x); } function div(uint256 x, uint256 y) internal pure returns (uint256 z) { return x / y; } function min(uint256 x, uint256 y) internal pure returns (uint256 z) { return x <= y ? x : y; } function max(uint256 x, uint256 y) internal pure returns (uint256 z) { return x >= y ? x : y; } function imin(int256 x, int256 y) internal pure returns (int256 z) { return x <= y ? x : y; } function imax(int256 x, int256 y) internal pure returns (int256 z) { return x >= y ? x : y; } uint256 constant WAD = 10**18; uint256 constant RAY = 10**27; function wmul(uint256 x, uint256 y) internal pure returns (uint256 z) { z = add(mul(x, y), WAD / 2) / WAD; } function rmul(uint256 x, uint256 y) internal pure returns (uint256 z) { z = add(mul(x, y), RAY / 2) / RAY; } function wdiv(uint256 x, uint256 y) internal pure returns (uint256 z) { z = add(mul(x, WAD), y / 2) / y; } function rdiv(uint256 x, uint256 y) internal pure returns (uint256 z) { z = add(mul(x, RAY), y / 2) / y; } // This famous algorithm is called "exponentiation by squaring" // and calculates x^n with x as fixed-point and n as regular unsigned. // // It's O(log n), instead of O(n) for naive repeated multiplication. // // These facts are why it works: // // If n is even, then x^n = (x^2)^(n/2). // If n is odd, then x^n = x * x^(n-1), // and applying the equation for even x gives // x^n = x * (x^2)^((n-1) / 2). // // Also, EVM division is flooring and // floor[(n-1) / 2] = floor[n / 2]. // function rpow(uint256 x, uint256 n) internal pure returns (uint256 z) { z = n % 2 != 0 ? x : RAY; for (n /= 2; n != 0; n /= 2) { x = rmul(x, x); if (n % 2 != 0) { z = rmul(z, x); } } } } contract DSNote { event LogNote( bytes4 indexed sig, address indexed guy, bytes32 indexed foo, bytes32 indexed bar, uint256 wad, bytes fax ) anonymous; modifier note { bytes32 foo; bytes32 bar; assembly { foo := calldataload(4) bar := calldataload(36) } emit LogNote(msg.sig, msg.sender, foo, bar, msg.value, msg.data); _; } } abstract contract DSProxy is DSAuth, DSNote { DSProxyCache public cache; // global cache for contracts constructor(address _cacheAddr) public { require(setCache(_cacheAddr)); } // solhint-disable-next-line no-empty-blocks receive() external payable {} // use the proxy to execute calldata _data on contract _code // function execute(bytes memory _code, bytes memory _data) // public // payable // virtual // returns (address target, bytes32 response); function execute(address _target, bytes memory _data) public payable virtual returns (bytes32 response); //set new cache function setCache(address _cacheAddr) public virtual payable returns (bool); } contract DSProxyCache { mapping(bytes32 => address) cache; function read(bytes memory _code) public view returns (address) { bytes32 hash = keccak256(_code); return cache[hash]; } function write(bytes memory _code) public returns (address target) { assembly { target := create(0, add(_code, 0x20), mload(_code)) switch iszero(extcodesize(target)) case 1 { // throw if contract failed to deploy revert(0, 0) } } bytes32 hash = keccak256(_code); cache[hash] = target; } } abstract contract DSProxyFactoryInterface { function build(address owner) public virtual returns (DSProxy proxy); } contract AaveHelper is DSMath { using SafeERC20 for ERC20; address payable public constant WALLET_ADDR = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; address public constant DISCOUNT_ADDR = 0x1b14E8D511c9A4395425314f849bD737BAF8208F; uint public constant MANUAL_SERVICE_FEE = 400; // 0.25% Fee uint public constant AUTOMATIC_SERVICE_FEE = 333; // 0.3% Fee address public constant BOT_REGISTRY_ADDRESS = 0x637726f8b08a7ABE3aE3aCaB01A80E2d8ddeF77B; address public constant ETH_ADDR = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant AAVE_LENDING_POOL_ADDRESSES = 0x24a42fD28C976A61Df5D00D0599C34c4f90748c8; uint public constant NINETY_NINE_PERCENT_WEI = 990000000000000000; uint16 public constant AAVE_REFERRAL_CODE = 64; /// @param _collateralAddress underlying token address /// @param _user users address function getMaxCollateral(address _collateralAddress, address _user) public view returns (uint256) { address lendingPoolAddressDataProvider = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolDataProvider(); address lendingPoolCoreAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); uint256 pow10 = 10 ** (18 - _getDecimals(_collateralAddress)); // fetch all needed data (,uint256 totalCollateralETH, uint256 totalBorrowsETH,,uint256 currentLTV,,,) = ILendingPool(lendingPoolAddressDataProvider).calculateUserGlobalData(_user); (,uint256 tokenLTV,,) = ILendingPool(lendingPoolCoreAddress).getReserveConfiguration(_collateralAddress); uint256 collateralPrice = IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_collateralAddress); uint256 userTokenBalance = ILendingPool(lendingPoolCoreAddress).getUserUnderlyingAssetBalance(_collateralAddress, _user); uint256 userTokenBalanceEth = wmul(userTokenBalance * pow10, collateralPrice); // if borrow is 0, return whole user balance if (totalBorrowsETH == 0) { return userTokenBalance; } uint256 maxCollateralEth = div(sub(mul(currentLTV, totalCollateralETH), mul(totalBorrowsETH, 100)), currentLTV); /// @dev final amount can't be higher than users token balance maxCollateralEth = maxCollateralEth > userTokenBalanceEth ? userTokenBalanceEth : maxCollateralEth; // might happen due to wmul precision if (maxCollateralEth >= totalCollateralETH) { return wdiv(totalCollateralETH, collateralPrice) / pow10; } // get sum of all other reserves multiplied with their liquidation thresholds by reversing formula uint256 a = sub(wmul(currentLTV, totalCollateralETH), wmul(tokenLTV, userTokenBalanceEth)); // add new collateral amount multiplied by its threshold, and then divide with new total collateral uint256 newLiquidationThreshold = wdiv(add(a, wmul(sub(userTokenBalanceEth, maxCollateralEth), tokenLTV)), sub(totalCollateralETH, maxCollateralEth)); // if new threshold is lower than first one, calculate new max collateral with newLiquidationThreshold if (newLiquidationThreshold < currentLTV) { maxCollateralEth = div(sub(mul(newLiquidationThreshold, totalCollateralETH), mul(totalBorrowsETH, 100)), newLiquidationThreshold); maxCollateralEth = maxCollateralEth > userTokenBalanceEth ? userTokenBalanceEth : maxCollateralEth; } return wmul(wdiv(maxCollateralEth, collateralPrice) / pow10, NINETY_NINE_PERCENT_WEI); } /// @param _borrowAddress underlying token address /// @param _user users address function getMaxBorrow(address _borrowAddress, address _user) public view returns (uint256) { address lendingPoolAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); (,,,,uint256 availableBorrowsETH,,,) = ILendingPool(lendingPoolAddress).getUserAccountData(_user); uint256 borrowPrice = IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_borrowAddress); return wmul(wdiv(availableBorrowsETH, borrowPrice) / (10 ** (18 - _getDecimals(_borrowAddress))), NINETY_NINE_PERCENT_WEI); } function getMaxBoost(address _borrowAddress, address _collateralAddress, address _user) public view returns (uint256) { address lendingPoolAddressDataProvider = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolDataProvider(); address lendingPoolCoreAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); (,uint256 totalCollateralETH, uint256 totalBorrowsETH,,uint256 currentLTV,,,) = ILendingPool(lendingPoolAddressDataProvider).calculateUserGlobalData(_user); (,uint256 tokenLTV,,) = ILendingPool(lendingPoolCoreAddress).getReserveConfiguration(_collateralAddress); totalCollateralETH = div(mul(totalCollateralETH, currentLTV), 100); uint256 availableBorrowsETH = wmul(mul(div(sub(totalCollateralETH, totalBorrowsETH), sub(100, tokenLTV)), 100), NINETY_NINE_PERCENT_WEI); uint256 borrowPrice = IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_borrowAddress); return wdiv(availableBorrowsETH, borrowPrice) / (10 ** (18 - _getDecimals(_borrowAddress))); } /// @notice Calculates the fee amount /// @param _amount Amount that is converted /// @param _user Actuall user addr not DSProxy /// @param _gasCost Ether amount of gas we are spending for tx /// @param _tokenAddr token addr. of token we are getting for the fee /// @return feeAmount The amount we took for the fee function getFee(uint _amount, address _user, uint _gasCost, address _tokenAddr) internal returns (uint feeAmount) { address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); uint fee = MANUAL_SERVICE_FEE; if (BotRegistry(BOT_REGISTRY_ADDRESS).botList(tx.origin)) { fee = AUTOMATIC_SERVICE_FEE; } if (Discount(DISCOUNT_ADDR).isCustomFeeSet(_user)) { fee = Discount(DISCOUNT_ADDR).getCustomServiceFee(_user); } feeAmount = (fee == 0) ? 0 : (_amount / fee); if (_gasCost != 0) { uint256 price = IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_tokenAddr); _gasCost = wdiv(_gasCost, price) / (10 ** (18 - _getDecimals(_tokenAddr))); feeAmount = add(feeAmount, _gasCost); } // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } if (_tokenAddr == ETH_ADDR) { WALLET_ADDR.transfer(feeAmount); } else { ERC20(_tokenAddr).safeTransfer(WALLET_ADDR, feeAmount); } } /// @notice Calculates the gas cost for transaction /// @param _amount Amount that is converted /// @param _user Actuall user addr not DSProxy /// @param _gasCost Ether amount of gas we are spending for tx /// @param _tokenAddr token addr. of token we are getting for the fee /// @return gasCost The amount we took for the gas cost function getGasCost(uint _amount, address _user, uint _gasCost, address _tokenAddr) internal returns (uint gasCost) { address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); if (_gasCost != 0) { uint256 price = IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_tokenAddr); _gasCost = wmul(_gasCost, price); gasCost = _gasCost; } // fee can't go over 20% of the whole amount if (gasCost > (_amount / 5)) { gasCost = _amount / 5; } if (_tokenAddr == ETH_ADDR) { WALLET_ADDR.transfer(gasCost); } else { ERC20(_tokenAddr).safeTransfer(WALLET_ADDR, gasCost); } } /// @notice Returns the owner of the DSProxy that called the contract function getUserAddress() internal view returns (address) { DSProxy proxy = DSProxy(payable(address(this))); return proxy.owner(); } /// @notice Approves token contract to pull underlying tokens from the DSProxy /// @param _tokenAddr Token we are trying to approve /// @param _caller Address which will gain the approval function approveToken(address _tokenAddr, address _caller) internal { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeApprove(_caller, uint256(-1)); } } /// @notice Send specific amount from contract to specific user /// @param _token Token we are trying to send /// @param _user User that should receive funds /// @param _amount Amount that should be sent function sendContractBalance(address _token, address _user, uint _amount) public { if (_amount == 0) return; if (_token == ETH_ADDR) { payable(_user).transfer(_amount); } else { ERC20(_token).safeTransfer(_user, _amount); } } function sendFullContractBalance(address _token, address _user) public { if (_token == ETH_ADDR) { sendContractBalance(_token, _user, address(this).balance); } else { sendContractBalance(_token, _user, ERC20(_token).balanceOf(address(this))); } } function _getDecimals(address _token) internal view returns (uint256) { if (_token == ETH_ADDR) return 18; return ERC20(_token).decimals(); } } contract AaveSafetyRatio is AaveHelper { function getSafetyRatio(address _user) public view returns(uint256) { address lendingPoolAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); (,,uint256 totalBorrowsETH,,uint256 availableBorrowsETH,,,) = ILendingPool(lendingPoolAddress).getUserAccountData(_user); if (totalBorrowsETH == 0) return uint256(0); return wdiv(add(totalBorrowsETH, availableBorrowsETH), totalBorrowsETH); } } contract AdminAuth { using SafeERC20 for ERC20; address public owner; address public admin; modifier onlyOwner() { require(owner == msg.sender); _; } constructor() public { owner = msg.sender; } /// @notice Admin is set by owner first time, after that admin is super role and has permission to change owner /// @param _admin Address of multisig that becomes admin function setAdminByOwner(address _admin) public { require(msg.sender == owner); require(admin == address(0)); admin = _admin; } /// @notice Admin is able to set new admin /// @param _admin Address of multisig that becomes new admin function setAdminByAdmin(address _admin) public { require(msg.sender == admin); admin = _admin; } /// @notice Admin is able to change owner /// @param _owner Address of new owner function setOwnerByAdmin(address _owner) public { require(msg.sender == admin); owner = _owner; } /// @notice Destroy the contract function kill() public onlyOwner { selfdestruct(payable(owner)); } /// @notice withdraw stuck funds function withdrawStuckFunds(address _token, uint _amount) public onlyOwner { if (_token == 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE) { payable(owner).transfer(_amount); } else { ERC20(_token).safeTransfer(owner, _amount); } } } contract Auth is AdminAuth { bool public ALL_AUTHORIZED = false; mapping(address => bool) public authorized; modifier onlyAuthorized() { require(ALL_AUTHORIZED || authorized[msg.sender]); _; } constructor() public { authorized[msg.sender] = true; } function setAuthorized(address _user, bool _approved) public onlyOwner { authorized[_user] = _approved; } function setAllAuthorized(bool _authorized) public onlyOwner { ALL_AUTHORIZED = _authorized; } } contract ProxyPermission { address public constant FACTORY_ADDRESS = 0x5a15566417e6C1c9546523066500bDDBc53F88C7; /// @notice Called in the context of DSProxy to authorize an address /// @param _contractAddr Address which will be authorized function givePermission(address _contractAddr) public { address currAuthority = address(DSAuth(address(this)).authority()); DSGuard guard = DSGuard(currAuthority); if (currAuthority == address(0)) { guard = DSGuardFactory(FACTORY_ADDRESS).newGuard(); DSAuth(address(this)).setAuthority(DSAuthority(address(guard))); } guard.permit(_contractAddr, address(this), bytes4(keccak256("execute(address,bytes)"))); } /// @notice Called in the context of DSProxy to remove authority of an address /// @param _contractAddr Auth address which will be removed from authority list function removePermission(address _contractAddr) public { address currAuthority = address(DSAuth(address(this)).authority()); // if there is no authority, that means that contract doesn't have permission if (currAuthority == address(0)) { return; } DSGuard guard = DSGuard(currAuthority); guard.forbid(_contractAddr, address(this), bytes4(keccak256("execute(address,bytes)"))); } function proxyOwner() internal returns(address) { return DSAuth(address(this)).owner(); } } contract CompoundMonitorProxy is AdminAuth { using SafeERC20 for ERC20; uint public CHANGE_PERIOD; address public monitor; address public newMonitor; address public lastMonitor; uint public changeRequestedTimestamp; mapping(address => bool) public allowed; event MonitorChangeInitiated(address oldMonitor, address newMonitor); event MonitorChangeCanceled(); event MonitorChangeFinished(address monitor); event MonitorChangeReverted(address monitor); // if someone who is allowed become malicious, owner can't be changed modifier onlyAllowed() { require(allowed[msg.sender] || msg.sender == owner); _; } modifier onlyMonitor() { require (msg.sender == monitor); _; } constructor(uint _changePeriod) public { CHANGE_PERIOD = _changePeriod * 1 days; } /// @notice Only monitor contract is able to call execute on users proxy /// @param _owner Address of cdp owner (users DSProxy address) /// @param _compoundSaverProxy Address of CompoundSaverProxy /// @param _data Data to send to CompoundSaverProxy function callExecute(address _owner, address _compoundSaverProxy, bytes memory _data) public payable onlyMonitor { // execute reverts if calling specific method fails DSProxyInterface(_owner).execute{value: msg.value}(_compoundSaverProxy, _data); // return if anything left if (address(this).balance > 0) { msg.sender.transfer(address(this).balance); } } /// @notice Allowed users are able to set Monitor contract without any waiting period first time /// @param _monitor Address of Monitor contract function setMonitor(address _monitor) public onlyAllowed { require(monitor == address(0)); monitor = _monitor; } /// @notice Allowed users are able to start procedure for changing monitor /// @dev after CHANGE_PERIOD needs to call confirmNewMonitor to actually make a change /// @param _newMonitor address of new monitor function changeMonitor(address _newMonitor) public onlyAllowed { require(changeRequestedTimestamp == 0); changeRequestedTimestamp = now; lastMonitor = monitor; newMonitor = _newMonitor; emit MonitorChangeInitiated(lastMonitor, newMonitor); } /// @notice At any point allowed users are able to cancel monitor change function cancelMonitorChange() public onlyAllowed { require(changeRequestedTimestamp > 0); changeRequestedTimestamp = 0; newMonitor = address(0); emit MonitorChangeCanceled(); } /// @notice Anyone is able to confirm new monitor after CHANGE_PERIOD if process is started function confirmNewMonitor() public onlyAllowed { require((changeRequestedTimestamp + CHANGE_PERIOD) < now); require(changeRequestedTimestamp != 0); require(newMonitor != address(0)); monitor = newMonitor; newMonitor = address(0); changeRequestedTimestamp = 0; emit MonitorChangeFinished(monitor); } /// @notice Its possible to revert monitor to last used monitor function revertMonitor() public onlyAllowed { require(lastMonitor != address(0)); monitor = lastMonitor; emit MonitorChangeReverted(monitor); } /// @notice Allowed users are able to add new allowed user /// @param _user Address of user that will be allowed function addAllowed(address _user) public onlyAllowed { allowed[_user] = true; } /// @notice Allowed users are able to remove allowed user /// @dev owner is always allowed even if someone tries to remove it from allowed mapping /// @param _user Address of allowed user function removeAllowed(address _user) public onlyAllowed { allowed[_user] = false; } function setChangePeriod(uint _periodInDays) public onlyAllowed { require(_periodInDays * 1 days > CHANGE_PERIOD); CHANGE_PERIOD = _periodInDays * 1 days; } /// @notice In case something is left in contract, owner is able to withdraw it /// @param _token address of token to withdraw balance function withdrawToken(address _token) public onlyOwner { uint balance = ERC20(_token).balanceOf(address(this)); ERC20(_token).safeTransfer(msg.sender, balance); } /// @notice In case something is left in contract, owner is able to withdraw it function withdrawEth() public onlyOwner { uint balance = address(this).balance; msg.sender.transfer(balance); } } contract CompoundSubscriptions is AdminAuth { struct CompoundHolder { address user; uint128 minRatio; uint128 maxRatio; uint128 optimalRatioBoost; uint128 optimalRatioRepay; bool boostEnabled; } struct SubPosition { uint arrPos; bool subscribed; } CompoundHolder[] public subscribers; mapping (address => SubPosition) public subscribersPos; uint public changeIndex; event Subscribed(address indexed user); event Unsubscribed(address indexed user); event Updated(address indexed user); event ParamUpdates(address indexed user, uint128, uint128, uint128, uint128, bool); /// @dev Called by the DSProxy contract which owns the Compound position /// @notice Adds the users Compound poistion in the list of subscriptions so it can be monitored /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalBoost Ratio amount which boost should target /// @param _optimalRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled function subscribe(uint128 _minRatio, uint128 _maxRatio, uint128 _optimalBoost, uint128 _optimalRepay, bool _boostEnabled) external { // if boost is not enabled, set max ratio to max uint uint128 localMaxRatio = _boostEnabled ? _maxRatio : uint128(-1); require(checkParams(_minRatio, localMaxRatio), "Must be correct params"); SubPosition storage subInfo = subscribersPos[msg.sender]; CompoundHolder memory subscription = CompoundHolder({ minRatio: _minRatio, maxRatio: localMaxRatio, optimalRatioBoost: _optimalBoost, optimalRatioRepay: _optimalRepay, user: msg.sender, boostEnabled: _boostEnabled }); changeIndex++; if (subInfo.subscribed) { subscribers[subInfo.arrPos] = subscription; emit Updated(msg.sender); emit ParamUpdates(msg.sender, _minRatio, localMaxRatio, _optimalBoost, _optimalRepay, _boostEnabled); } else { subscribers.push(subscription); subInfo.arrPos = subscribers.length - 1; subInfo.subscribed = true; emit Subscribed(msg.sender); } } /// @notice Called by the users DSProxy /// @dev Owner who subscribed cancels his subscription function unsubscribe() external { _unsubscribe(msg.sender); } /// @dev Checks limit if minRatio is bigger than max /// @param _minRatio Minimum ratio, bellow which repay can be triggered /// @param _maxRatio Maximum ratio, over which boost can be triggered /// @return Returns bool if the params are correct function checkParams(uint128 _minRatio, uint128 _maxRatio) internal pure returns (bool) { if (_minRatio > _maxRatio) { return false; } return true; } /// @dev Internal method to remove a subscriber from the list /// @param _user The actual address that owns the Compound position function _unsubscribe(address _user) internal { require(subscribers.length > 0, "Must have subscribers in the list"); SubPosition storage subInfo = subscribersPos[_user]; require(subInfo.subscribed, "Must first be subscribed"); address lastOwner = subscribers[subscribers.length - 1].user; SubPosition storage subInfo2 = subscribersPos[lastOwner]; subInfo2.arrPos = subInfo.arrPos; subscribers[subInfo.arrPos] = subscribers[subscribers.length - 1]; subscribers.pop(); // remove last element and reduce arr length changeIndex++; subInfo.subscribed = false; subInfo.arrPos = 0; emit Unsubscribed(msg.sender); } /// @dev Checks if the user is subscribed /// @param _user The actual address that owns the Compound position /// @return If the user is subscribed function isSubscribed(address _user) public view returns (bool) { SubPosition storage subInfo = subscribersPos[_user]; return subInfo.subscribed; } /// @dev Returns subscribtion information about a user /// @param _user The actual address that owns the Compound position /// @return Subscription information about the user if exists function getHolder(address _user) public view returns (CompoundHolder memory) { SubPosition storage subInfo = subscribersPos[_user]; return subscribers[subInfo.arrPos]; } /// @notice Helper method to return all the subscribed CDPs /// @return List of all subscribers function getSubscribers() public view returns (CompoundHolder[] memory) { return subscribers; } /// @notice Helper method for the frontend, returns all the subscribed CDPs paginated /// @param _page What page of subscribers you want /// @param _perPage Number of entries per page /// @return List of all subscribers for that page function getSubscribersByPage(uint _page, uint _perPage) public view returns (CompoundHolder[] memory) { CompoundHolder[] memory holders = new CompoundHolder[](_perPage); uint start = _page * _perPage; uint end = start + _perPage; end = (end > holders.length) ? holders.length : end; uint count = 0; for (uint i = start; i < end; i++) { holders[count] = subscribers[i]; count++; } return holders; } ////////////// ADMIN METHODS /////////////////// /// @notice Admin function to unsubscribe a CDP /// @param _user The actual address that owns the Compound position function unsubscribeByAdmin(address _user) public onlyOwner { SubPosition storage subInfo = subscribersPos[_user]; if (subInfo.subscribed) { _unsubscribe(_user); } } } contract CompoundSubscriptionsProxy is ProxyPermission { address public constant COMPOUND_SUBSCRIPTION_ADDRESS = 0x52015EFFD577E08f498a0CCc11905925D58D6207; address public constant COMPOUND_MONITOR_PROXY = 0xB1cF8DE8e791E4Ed1Bd86c03E2fc1f14389Cb10a; /// @notice Calls subscription contract and creates a DSGuard if non existent /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalRatioBoost Ratio amount which boost should target /// @param _optimalRatioRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled function subscribe( uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled ) public { givePermission(COMPOUND_MONITOR_PROXY); ICompoundSubscription(COMPOUND_SUBSCRIPTION_ADDRESS).subscribe( _minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled); } /// @notice Calls subscription contract and updated existing parameters /// @dev If subscription is non existent this will create one /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalRatioBoost Ratio amount which boost should target /// @param _optimalRatioRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled function update( uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled ) public { ICompoundSubscription(COMPOUND_SUBSCRIPTION_ADDRESS).subscribe(_minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled); } /// @notice Calls the subscription contract to unsubscribe the caller function unsubscribe() public { removePermission(COMPOUND_MONITOR_PROXY); ICompoundSubscription(COMPOUND_SUBSCRIPTION_ADDRESS).unsubscribe(); } } contract CompoundCreateTaker is ProxyPermission { using SafeERC20 for ERC20; address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); // solhint-disable-next-line const-name-snakecase DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); struct CreateInfo { address cCollAddress; address cBorrowAddress; uint depositAmount; } /// @notice Main function which will take a FL and open a leverage position /// @dev Call through DSProxy, if _exchangeData.destAddr is a token approve DSProxy /// @param _createInfo [cCollAddress, cBorrowAddress, depositAmount] /// @param _exchangeData Exchange data struct function openLeveragedLoan( CreateInfo memory _createInfo, SaverExchangeCore.ExchangeData memory _exchangeData, address payable _compReceiver ) public payable { uint loanAmount = _exchangeData.srcAmount; // Pull tokens from user if (_exchangeData.destAddr != ETH_ADDRESS) { ERC20(_exchangeData.destAddr).safeTransferFrom(msg.sender, address(this), _createInfo.depositAmount); } else { require(msg.value >= _createInfo.depositAmount, "Must send correct amount of eth"); } // Send tokens to FL receiver sendDeposit(_compReceiver, _exchangeData.destAddr); // Pack the struct data (uint[4] memory numData, address[6] memory cAddresses, bytes memory callData) = _packData(_createInfo, _exchangeData); bytes memory paramsData = abi.encode(numData, cAddresses, callData, address(this)); givePermission(_compReceiver); lendingPool.flashLoan(_compReceiver, _exchangeData.srcAddr, loanAmount, paramsData); removePermission(_compReceiver); logger.Log(address(this), msg.sender, "CompoundLeveragedLoan", abi.encode(_exchangeData.srcAddr, _exchangeData.destAddr, _exchangeData.srcAmount, _exchangeData.destAmount)); } function sendDeposit(address payable _compoundReceiver, address _token) internal { if (_token != ETH_ADDRESS) { ERC20(_token).safeTransfer(_compoundReceiver, ERC20(_token).balanceOf(address(this))); } _compoundReceiver.transfer(address(this).balance); } function _packData( CreateInfo memory _createInfo, SaverExchangeCore.ExchangeData memory exchangeData ) internal pure returns (uint[4] memory numData, address[6] memory cAddresses, bytes memory callData) { numData = [ exchangeData.srcAmount, exchangeData.destAmount, exchangeData.minPrice, exchangeData.price0x ]; cAddresses = [ _createInfo.cCollAddress, _createInfo.cBorrowAddress, exchangeData.srcAddr, exchangeData.destAddr, exchangeData.exchangeAddr, exchangeData.wrapper ]; callData = exchangeData.callData; } } contract CarefulMath { /** * @dev Possible error codes that we can return */ enum MathError { NO_ERROR, DIVISION_BY_ZERO, INTEGER_OVERFLOW, INTEGER_UNDERFLOW } /** * @dev Multiplies two numbers, returns an error on overflow. */ function mulUInt(uint a, uint b) internal pure returns (MathError, uint) { if (a == 0) { return (MathError.NO_ERROR, 0); } uint c = a * b; if (c / a != b) { return (MathError.INTEGER_OVERFLOW, 0); } else { return (MathError.NO_ERROR, c); } } /** * @dev Integer division of two numbers, truncating the quotient. */ function divUInt(uint a, uint b) internal pure returns (MathError, uint) { if (b == 0) { return (MathError.DIVISION_BY_ZERO, 0); } return (MathError.NO_ERROR, a / b); } /** * @dev Subtracts two numbers, returns an error on overflow (i.e. if subtrahend is greater than minuend). */ function subUInt(uint a, uint b) internal pure returns (MathError, uint) { if (b <= a) { return (MathError.NO_ERROR, a - b); } else { return (MathError.INTEGER_UNDERFLOW, 0); } } /** * @dev Adds two numbers, returns an error on overflow. */ function addUInt(uint a, uint b) internal pure returns (MathError, uint) { uint c = a + b; if (c >= a) { return (MathError.NO_ERROR, c); } else { return (MathError.INTEGER_OVERFLOW, 0); } } /** * @dev add a and b and then subtract c */ function addThenSubUInt(uint a, uint b, uint c) internal pure returns (MathError, uint) { (MathError err0, uint sum) = addUInt(a, b); if (err0 != MathError.NO_ERROR) { return (err0, 0); } return subUInt(sum, c); } } contract Exponential is CarefulMath { uint constant expScale = 1e18; uint constant doubleScale = 1e36; uint constant halfExpScale = expScale/2; uint constant mantissaOne = expScale; struct Exp { uint mantissa; } struct Double { uint mantissa; } /** * @dev Creates an exponential from numerator and denominator values. * Note: Returns an error if (`num` * 10e18) > MAX_INT, * or if `denom` is zero. */ function getExp(uint num, uint denom) pure internal returns (MathError, Exp memory) { (MathError err0, uint scaledNumerator) = mulUInt(num, expScale); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } (MathError err1, uint rational) = divUInt(scaledNumerator, denom); if (err1 != MathError.NO_ERROR) { return (err1, Exp({mantissa: 0})); } return (MathError.NO_ERROR, Exp({mantissa: rational})); } /** * @dev Adds two exponentials, returning a new exponential. */ function addExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) { (MathError error, uint result) = addUInt(a.mantissa, b.mantissa); return (error, Exp({mantissa: result})); } /** * @dev Subtracts two exponentials, returning a new exponential. */ function subExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) { (MathError error, uint result) = subUInt(a.mantissa, b.mantissa); return (error, Exp({mantissa: result})); } /** * @dev Multiply an Exp by a scalar, returning a new Exp. */ function mulScalar(Exp memory a, uint scalar) pure internal returns (MathError, Exp memory) { (MathError err0, uint scaledMantissa) = mulUInt(a.mantissa, scalar); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } return (MathError.NO_ERROR, Exp({mantissa: scaledMantissa})); } /** * @dev Multiply an Exp by a scalar, then truncate to return an unsigned integer. */ function mulScalarTruncate(Exp memory a, uint scalar) pure internal returns (MathError, uint) { (MathError err, Exp memory product) = mulScalar(a, scalar); if (err != MathError.NO_ERROR) { return (err, 0); } return (MathError.NO_ERROR, truncate(product)); } /** * @dev Multiply an Exp by a scalar, truncate, then add an to an unsigned integer, returning an unsigned integer. */ function mulScalarTruncateAddUInt(Exp memory a, uint scalar, uint addend) pure internal returns (MathError, uint) { (MathError err, Exp memory product) = mulScalar(a, scalar); if (err != MathError.NO_ERROR) { return (err, 0); } return addUInt(truncate(product), addend); } /** * @dev Divide an Exp by a scalar, returning a new Exp. */ function divScalar(Exp memory a, uint scalar) pure internal returns (MathError, Exp memory) { (MathError err0, uint descaledMantissa) = divUInt(a.mantissa, scalar); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } return (MathError.NO_ERROR, Exp({mantissa: descaledMantissa})); } /** * @dev Divide a scalar by an Exp, returning a new Exp. */ function divScalarByExp(uint scalar, Exp memory divisor) pure internal returns (MathError, Exp memory) { /* We are doing this as: getExp(mulUInt(expScale, scalar), divisor.mantissa) How it works: Exp = a / b; Scalar = s; `s / (a / b)` = `b * s / a` and since for an Exp `a = mantissa, b = expScale` */ (MathError err0, uint numerator) = mulUInt(expScale, scalar); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } return getExp(numerator, divisor.mantissa); } /** * @dev Divide a scalar by an Exp, then truncate to return an unsigned integer. */ function divScalarByExpTruncate(uint scalar, Exp memory divisor) pure internal returns (MathError, uint) { (MathError err, Exp memory fraction) = divScalarByExp(scalar, divisor); if (err != MathError.NO_ERROR) { return (err, 0); } return (MathError.NO_ERROR, truncate(fraction)); } /** * @dev Multiplies two exponentials, returning a new exponential. */ function mulExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) { (MathError err0, uint doubleScaledProduct) = mulUInt(a.mantissa, b.mantissa); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } // We add half the scale before dividing so that we get rounding instead of truncation. // See "Listing 6" and text above it at https://accu.org/index.php/journals/1717 // Without this change, a result like 6.6...e-19 will be truncated to 0 instead of being rounded to 1e-18. (MathError err1, uint doubleScaledProductWithHalfScale) = addUInt(halfExpScale, doubleScaledProduct); if (err1 != MathError.NO_ERROR) { return (err1, Exp({mantissa: 0})); } (MathError err2, uint product) = divUInt(doubleScaledProductWithHalfScale, expScale); // The only error `div` can return is MathError.DIVISION_BY_ZERO but we control `expScale` and it is not zero. assert(err2 == MathError.NO_ERROR); return (MathError.NO_ERROR, Exp({mantissa: product})); } /** * @dev Multiplies two exponentials given their mantissas, returning a new exponential. */ function mulExp(uint a, uint b) pure internal returns (MathError, Exp memory) { return mulExp(Exp({mantissa: a}), Exp({mantissa: b})); } /** * @dev Multiplies three exponentials, returning a new exponential. */ function mulExp3(Exp memory a, Exp memory b, Exp memory c) pure internal returns (MathError, Exp memory) { (MathError err, Exp memory ab) = mulExp(a, b); if (err != MathError.NO_ERROR) { return (err, ab); } return mulExp(ab, c); } /** * @dev Divides two exponentials, returning a new exponential. * (a/scale) / (b/scale) = (a/scale) * (scale/b) = a/b, * which we can scale as an Exp by calling getExp(a.mantissa, b.mantissa) */ function divExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) { return getExp(a.mantissa, b.mantissa); } /** * @dev Truncates the given exp to a whole number value. * For example, truncate(Exp{mantissa: 15 * expScale}) = 15 */ function truncate(Exp memory exp) pure internal returns (uint) { // Note: We are not using careful math here as we're performing a division that cannot fail return exp.mantissa / expScale; } /** * @dev Checks if first Exp is less than second Exp. */ function lessThanExp(Exp memory left, Exp memory right) pure internal returns (bool) { return left.mantissa < right.mantissa; } /** * @dev Checks if left Exp <= right Exp. */ function lessThanOrEqualExp(Exp memory left, Exp memory right) pure internal returns (bool) { return left.mantissa <= right.mantissa; } /** * @dev Checks if left Exp > right Exp. */ function greaterThanExp(Exp memory left, Exp memory right) pure internal returns (bool) { return left.mantissa > right.mantissa; } /** * @dev returns true if Exp is exactly zero */ function isZeroExp(Exp memory value) pure internal returns (bool) { return value.mantissa == 0; } function sub_(Exp memory a, Exp memory b) pure internal returns (Exp memory) { return Exp({mantissa: sub_(a.mantissa, b.mantissa)}); } function sub_(Double memory a, Double memory b) pure internal returns (Double memory) { return Double({mantissa: sub_(a.mantissa, b.mantissa)}); } function sub_(uint a, uint b) pure internal returns (uint) { return sub_(a, b, "subtraction underflow"); } function sub_(uint a, uint b, string memory errorMessage) pure internal returns (uint) { require(b <= a, errorMessage); return a - b; } function mul_(Exp memory a, Exp memory b) pure internal returns (Exp memory) { return Exp({mantissa: mul_(a.mantissa, b.mantissa) / expScale}); } function mul_(Exp memory a, uint b) pure internal returns (Exp memory) { return Exp({mantissa: mul_(a.mantissa, b)}); } function mul_(uint a, Exp memory b) pure internal returns (uint) { return mul_(a, b.mantissa) / expScale; } function mul_(Double memory a, Double memory b) pure internal returns (Double memory) { return Double({mantissa: mul_(a.mantissa, b.mantissa) / doubleScale}); } function mul_(Double memory a, uint b) pure internal returns (Double memory) { return Double({mantissa: mul_(a.mantissa, b)}); } function mul_(uint a, Double memory b) pure internal returns (uint) { return mul_(a, b.mantissa) / doubleScale; } function mul_(uint a, uint b) pure internal returns (uint) { return mul_(a, b, "multiplication overflow"); } function mul_(uint a, uint b, string memory errorMessage) pure internal returns (uint) { if (a == 0 || b == 0) { return 0; } uint c = a * b; require(c / a == b, errorMessage); return c; } function div_(Exp memory a, Exp memory b) pure internal returns (Exp memory) { return Exp({mantissa: div_(mul_(a.mantissa, expScale), b.mantissa)}); } function div_(Exp memory a, uint b) pure internal returns (Exp memory) { return Exp({mantissa: div_(a.mantissa, b)}); } function div_(uint a, Exp memory b) pure internal returns (uint) { return div_(mul_(a, expScale), b.mantissa); } function div_(Double memory a, Double memory b) pure internal returns (Double memory) { return Double({mantissa: div_(mul_(a.mantissa, doubleScale), b.mantissa)}); } function div_(Double memory a, uint b) pure internal returns (Double memory) { return Double({mantissa: div_(a.mantissa, b)}); } function div_(uint a, Double memory b) pure internal returns (uint) { return div_(mul_(a, doubleScale), b.mantissa); } function div_(uint a, uint b) pure internal returns (uint) { return div_(a, b, "divide by zero"); } function div_(uint a, uint b, string memory errorMessage) pure internal returns (uint) { require(b > 0, errorMessage); return a / b; } function add_(Exp memory a, Exp memory b) pure internal returns (Exp memory) { return Exp({mantissa: add_(a.mantissa, b.mantissa)}); } function add_(Double memory a, Double memory b) pure internal returns (Double memory) { return Double({mantissa: add_(a.mantissa, b.mantissa)}); } function add_(uint a, uint b) pure internal returns (uint) { return add_(a, b, "addition overflow"); } function add_(uint a, uint b, string memory errorMessage) pure internal returns (uint) { uint c = a + b; require(c >= a, errorMessage); return c; } } contract CompoundBorrowProxy { using SafeERC20 for ERC20; address public constant ETH_ADDR = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant COMPTROLLER_ADDR = 0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B; function borrow(address _cCollToken, address _cBorrowToken, address _borrowToken, uint _amount) public { address[] memory markets = new address[](2); markets[0] = _cCollToken; markets[1] = _cBorrowToken; ComptrollerInterface(COMPTROLLER_ADDR).enterMarkets(markets); require(CTokenInterface(_cBorrowToken).borrow(_amount) == 0); // withdraw funds to msg.sender if (_borrowToken != ETH_ADDR) { ERC20(_borrowToken).safeTransfer(msg.sender, ERC20(_borrowToken).balanceOf(address(this))); } else { msg.sender.transfer(address(this).balance); } } } contract CreamSafetyRatio is Exponential, DSMath { // solhint-disable-next-line const-name-snakecase ComptrollerInterface public constant comp = ComptrollerInterface(0x3d5BC3c8d13dcB8bF317092d84783c2697AE9258); /// @notice Calcualted the ratio of debt / adjusted collateral /// @param _user Address of the user function getSafetyRatio(address _user) public view returns (uint) { // For each asset the account is in address[] memory assets = comp.getAssetsIn(_user); address oracleAddr = comp.oracle(); uint sumCollateral = 0; uint sumBorrow = 0; for (uint i = 0; i < assets.length; i++) { address asset = assets[i]; (, uint cTokenBalance, uint borrowBalance, uint exchangeRateMantissa) = CTokenInterface(asset).getAccountSnapshot(_user); Exp memory oraclePrice; if (cTokenBalance != 0 || borrowBalance != 0) { oraclePrice = Exp({mantissa: CompoundOracleInterface(oracleAddr).getUnderlyingPrice(asset)}); } // Sum up collateral in Eth if (cTokenBalance != 0) { (, uint collFactorMantissa) = comp.markets(address(asset)); Exp memory collateralFactor = Exp({mantissa: collFactorMantissa}); Exp memory exchangeRate = Exp({mantissa: exchangeRateMantissa}); (, Exp memory tokensToEther) = mulExp3(collateralFactor, exchangeRate, oraclePrice); (, sumCollateral) = mulScalarTruncateAddUInt(tokensToEther, cTokenBalance, sumCollateral); } // Sum up debt in Eth if (borrowBalance != 0) { (, sumBorrow) = mulScalarTruncateAddUInt(oraclePrice, borrowBalance, sumBorrow); } } if (sumBorrow == 0) return uint(-1); uint borrowPowerUsed = (sumBorrow * 10**18) / sumCollateral; return wdiv(1e18, borrowPowerUsed); } } contract CreamSaverHelper is DSMath, Exponential { using SafeERC20 for ERC20; address payable public constant WALLET_ADDR = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; address public constant DISCOUNT_ADDR = 0x1b14E8D511c9A4395425314f849bD737BAF8208F; uint public constant MANUAL_SERVICE_FEE = 400; // 0.25% Fee uint public constant AUTOMATIC_SERVICE_FEE = 333; // 0.3% Fee address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant CETH_ADDRESS = 0xD06527D5e56A3495252A528C4987003b712860eE; address public constant COMPTROLLER = 0x3d5BC3c8d13dcB8bF317092d84783c2697AE9258; address public constant BOT_REGISTRY_ADDRESS = 0x637726f8b08a7ABE3aE3aCaB01A80E2d8ddeF77B; /// @notice Helper method to payback the cream debt /// @dev If amount is bigger it will repay the whole debt and send the extra to the _user /// @param _amount Amount of tokens we want to repay /// @param _cBorrowToken Ctoken address we are repaying /// @param _borrowToken Token address we are repaying /// @param _user Owner of the cream position we are paying back function paybackDebt(uint _amount, address _cBorrowToken, address _borrowToken, address payable _user) internal { uint wholeDebt = CTokenInterface(_cBorrowToken).borrowBalanceCurrent(address(this)); if (_amount > wholeDebt) { if (_borrowToken == ETH_ADDRESS) { _user.transfer((_amount - wholeDebt)); } else { ERC20(_borrowToken).safeTransfer(_user, (_amount - wholeDebt)); } _amount = wholeDebt; } approveCToken(_borrowToken, _cBorrowToken); if (_borrowToken == ETH_ADDRESS) { CEtherInterface(_cBorrowToken).repayBorrow{value: _amount}(); } else { require(CTokenInterface(_cBorrowToken).repayBorrow(_amount) == 0); } } /// @notice Calculates the fee amount /// @param _amount Amount that is converted /// @param _user Actuall user addr not DSProxy /// @param _gasCost Ether amount of gas we are spending for tx /// @param _cTokenAddr CToken addr. of token we are getting for the fee /// @return feeAmount The amount we took for the fee function getFee(uint _amount, address _user, uint _gasCost, address _cTokenAddr) internal returns (uint feeAmount) { uint fee = MANUAL_SERVICE_FEE; if (BotRegistry(BOT_REGISTRY_ADDRESS).botList(tx.origin)) { fee = AUTOMATIC_SERVICE_FEE; } address tokenAddr = getUnderlyingAddr(_cTokenAddr); if (Discount(DISCOUNT_ADDR).isCustomFeeSet(_user)) { fee = Discount(DISCOUNT_ADDR).getCustomServiceFee(_user); } feeAmount = (fee == 0) ? 0 : (_amount / fee); if (_gasCost != 0) { address oracle = ComptrollerInterface(COMPTROLLER).oracle(); uint ethTokenPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(_cTokenAddr); _gasCost = wdiv(_gasCost, ethTokenPrice); feeAmount = add(feeAmount, _gasCost); } // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } if (tokenAddr == ETH_ADDRESS) { WALLET_ADDR.transfer(feeAmount); } else { ERC20(tokenAddr).safeTransfer(WALLET_ADDR, feeAmount); } } /// @notice Calculates the gas cost of transaction and send it to wallet /// @param _amount Amount that is converted /// @param _gasCost Ether amount of gas we are spending for tx /// @param _cTokenAddr CToken addr. of token we are getting for the fee /// @return feeAmount The amount we took for the fee function getGasCost(uint _amount, uint _gasCost, address _cTokenAddr) internal returns (uint feeAmount) { address tokenAddr = getUnderlyingAddr(_cTokenAddr); if (_gasCost != 0) { address oracle = ComptrollerInterface(COMPTROLLER).oracle(); uint ethTokenPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(_cTokenAddr); feeAmount = wdiv(_gasCost, ethTokenPrice); } // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } if (tokenAddr == ETH_ADDRESS) { WALLET_ADDR.transfer(feeAmount); } else { ERC20(tokenAddr).safeTransfer(WALLET_ADDR, feeAmount); } } /// @notice Enters the market for the collatera and borrow tokens /// @param _cTokenAddrColl Collateral address we are entering the market in /// @param _cTokenAddrBorrow Borrow address we are entering the market in function enterMarket(address _cTokenAddrColl, address _cTokenAddrBorrow) internal { address[] memory markets = new address[](2); markets[0] = _cTokenAddrColl; markets[1] = _cTokenAddrBorrow; ComptrollerInterface(COMPTROLLER).enterMarkets(markets); } /// @notice Approves CToken contract to pull underlying tokens from the DSProxy /// @param _tokenAddr Token we are trying to approve /// @param _cTokenAddr Address which will gain the approval function approveCToken(address _tokenAddr, address _cTokenAddr) internal { if (_tokenAddr != ETH_ADDRESS) { ERC20(_tokenAddr).safeApprove(_cTokenAddr, uint(-1)); } } /// @notice Returns the underlying address of the cToken asset /// @param _cTokenAddress cToken address /// @return Token address of the cToken specified function getUnderlyingAddr(address _cTokenAddress) internal returns (address) { if (_cTokenAddress == CETH_ADDRESS) { return ETH_ADDRESS; } else { return CTokenInterface(_cTokenAddress).underlying(); } } /// @notice Returns the owner of the DSProxy that called the contract function getUserAddress() internal view returns (address) { DSProxy proxy = DSProxy(uint160(address(this))); return proxy.owner(); } /// @notice Returns the maximum amount of collateral available to withdraw /// @dev Due to rounding errors the result is - 1% wei from the exact amount /// @param _cCollAddress Collateral we are getting the max value of /// @param _account Users account /// @return Returns the max. collateral amount in that token function getMaxCollateral(address _cCollAddress, address _account) public returns (uint) { (, uint liquidityInEth, ) = ComptrollerInterface(COMPTROLLER).getAccountLiquidity(_account); uint usersBalance = CTokenInterface(_cCollAddress).balanceOfUnderlying(_account); address oracle = ComptrollerInterface(COMPTROLLER).oracle(); if (liquidityInEth == 0) return usersBalance; CTokenInterface(_cCollAddress).accrueInterest(); if (_cCollAddress == CETH_ADDRESS) { if (liquidityInEth > usersBalance) return usersBalance; return sub(liquidityInEth, (liquidityInEth / 100)); } uint ethPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(_cCollAddress); uint liquidityInToken = wdiv(liquidityInEth, ethPrice); if (liquidityInToken > usersBalance) return usersBalance; return sub(liquidityInToken, (liquidityInToken / 100)); // cut off 1% due to rounding issues } /// @notice Returns the maximum amount of borrow amount available /// @dev Due to rounding errors the result is - 1% wei from the exact amount /// @param _cBorrowAddress Borrow token we are getting the max value of /// @param _account Users account /// @return Returns the max. borrow amount in that token function getMaxBorrow(address _cBorrowAddress, address _account) public returns (uint) { (, uint liquidityInEth, ) = ComptrollerInterface(COMPTROLLER).getAccountLiquidity(_account); address oracle = ComptrollerInterface(COMPTROLLER).oracle(); CTokenInterface(_cBorrowAddress).accrueInterest(); if (_cBorrowAddress == CETH_ADDRESS) return sub(liquidityInEth, (liquidityInEth / 100)); uint ethPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(_cBorrowAddress); uint liquidityInToken = wdiv(liquidityInEth, ethPrice); return sub(liquidityInToken, (liquidityInToken / 100)); // cut off 1% due to rounding issues } } contract CreamBorrowProxy { using SafeERC20 for ERC20; address public constant ETH_ADDR = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant COMPTROLLER_ADDR = 0x3d5BC3c8d13dcB8bF317092d84783c2697AE9258; function borrow(address _cCollToken, address _cBorrowToken, address _borrowToken, uint _amount) public { address[] memory markets = new address[](2); markets[0] = _cCollToken; markets[1] = _cBorrowToken; ComptrollerInterface(COMPTROLLER_ADDR).enterMarkets(markets); require(CTokenInterface(_cBorrowToken).borrow(_amount) == 0); // withdraw funds to msg.sender if (_borrowToken != ETH_ADDR) { ERC20(_borrowToken).safeTransfer(msg.sender, ERC20(_borrowToken).balanceOf(address(this))); } else { msg.sender.transfer(address(this).balance); } } } contract AllowanceProxy is AdminAuth { using SafeERC20 for ERC20; address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; // TODO: Real saver exchange address SaverExchange saverExchange = SaverExchange(0x235abFAd01eb1BDa28Ef94087FBAA63E18074926); function callSell(SaverExchangeCore.ExchangeData memory exData) public payable { pullAndSendTokens(exData.srcAddr, exData.srcAmount); saverExchange.sell{value: msg.value}(exData, msg.sender); } function callBuy(SaverExchangeCore.ExchangeData memory exData) public payable { pullAndSendTokens(exData.srcAddr, exData.srcAmount); saverExchange.buy{value: msg.value}(exData, msg.sender); } function pullAndSendTokens(address _tokenAddr, uint _amount) internal { if (_tokenAddr == KYBER_ETH_ADDRESS) { require(msg.value >= _amount, "msg.value smaller than amount"); } else { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(saverExchange), _amount); } } function ownerChangeExchange(address payable _newExchange) public onlyOwner { saverExchange = SaverExchange(_newExchange); } } contract Prices is DSMath { address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; enum ActionType { SELL, BUY } /// @notice Returns the best estimated price from 2 exchanges /// @param _amount Amount of source tokens you want to exchange /// @param _srcToken Address of the source token /// @param _destToken Address of the destination token /// @param _type Type of action SELL|BUY /// @param _wrappers Array of wrapper addresses to compare /// @return (address, uint) The address of the best exchange and the exchange price function getBestPrice( uint256 _amount, address _srcToken, address _destToken, ActionType _type, address[] memory _wrappers ) public returns (address, uint256) { uint256[] memory rates = new uint256[](_wrappers.length); for (uint i=0; i<_wrappers.length; i++) { rates[i] = getExpectedRate(_wrappers[i], _srcToken, _destToken, _amount, _type); } return getBiggestRate(_wrappers, rates); } /// @notice Return the expected rate from the exchange wrapper /// @dev In case of Oasis/Uniswap handles the different precision tokens /// @param _wrapper Address of exchange wrapper /// @param _srcToken From token /// @param _destToken To token /// @param _amount Amount to be exchanged /// @param _type Type of action SELL|BUY function getExpectedRate( address _wrapper, address _srcToken, address _destToken, uint256 _amount, ActionType _type ) public returns (uint256) { bool success; bytes memory result; if (_type == ActionType.SELL) { (success, result) = _wrapper.call(abi.encodeWithSignature( "getSellRate(address,address,uint256)", _srcToken, _destToken, _amount )); } else { (success, result) = _wrapper.call(abi.encodeWithSignature( "getBuyRate(address,address,uint256)", _srcToken, _destToken, _amount )); } if (success) { return sliceUint(result, 0); } return 0; } /// @notice Finds the biggest rate between exchanges, needed for sell rate /// @param _wrappers Array of wrappers to compare /// @param _rates Array of rates to compare function getBiggestRate( address[] memory _wrappers, uint256[] memory _rates ) internal pure returns (address, uint) { uint256 maxIndex = 0; // starting from 0 in case there is only one rate in array for (uint256 i=0; i<_rates.length; i++) { if (_rates[i] > _rates[maxIndex]) { maxIndex = i; } } return (_wrappers[maxIndex], _rates[maxIndex]); } function getDecimals(address _token) internal view returns (uint256) { if (_token == KYBER_ETH_ADDRESS) return 18; return ERC20(_token).decimals(); } function sliceUint(bytes memory bs, uint256 start) internal pure returns (uint256) { require(bs.length >= start + 32, "slicing out of range"); uint256 x; assembly { x := mload(add(bs, add(0x20, start))) } return x; } } contract SaverExchangeHelper { using SafeERC20 for ERC20; address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant WETH_ADDRESS = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address payable public constant WALLET_ID = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; address public constant DISCOUNT_ADDRESS = 0x1b14E8D511c9A4395425314f849bD737BAF8208F; address public constant SAVER_EXCHANGE_REGISTRY = 0x25dd3F51e0C3c3Ff164DDC02A8E4D65Bb9cBB12D; address public constant ERC20_PROXY_0X = 0x95E6F48254609A6ee006F7D493c8e5fB97094ceF; address public constant ZRX_ALLOWLIST_ADDR = 0x4BA1f38427b33B8ab7Bb0490200dAE1F1C36823F; function getDecimals(address _token) internal view returns (uint256) { if (_token == KYBER_ETH_ADDRESS) return 18; return ERC20(_token).decimals(); } function getBalance(address _tokenAddr) internal view returns (uint balance) { if (_tokenAddr == KYBER_ETH_ADDRESS) { balance = address(this).balance; } else { balance = ERC20(_tokenAddr).balanceOf(address(this)); } } function approve0xProxy(address _tokenAddr, uint _amount) internal { if (_tokenAddr != KYBER_ETH_ADDRESS) { ERC20(_tokenAddr).safeApprove(address(ERC20_PROXY_0X), _amount); } } function sendLeftover(address _srcAddr, address _destAddr, address payable _to) internal { // send back any leftover ether or tokens if (address(this).balance > 0) { _to.transfer(address(this).balance); } if (getBalance(_srcAddr) > 0) { ERC20(_srcAddr).safeTransfer(_to, getBalance(_srcAddr)); } if (getBalance(_destAddr) > 0) { ERC20(_destAddr).safeTransfer(_to, getBalance(_destAddr)); } } function sliceUint(bytes memory bs, uint256 start) internal pure returns (uint256) { require(bs.length >= start + 32, "slicing out of range"); uint256 x; assembly { x := mload(add(bs, add(0x20, start))) } return x; } } contract SaverExchangeRegistry is AdminAuth { mapping(address => bool) private wrappers; constructor() public { wrappers[0x880A845A85F843a5c67DB2061623c6Fc3bB4c511] = true; wrappers[0x4c9B55f2083629A1F7aDa257ae984E03096eCD25] = true; wrappers[0x42A9237b872368E1bec4Ca8D26A928D7d39d338C] = true; } function addWrapper(address _wrapper) public onlyOwner { wrappers[_wrapper] = true; } function removeWrapper(address _wrapper) public onlyOwner { wrappers[_wrapper] = false; } function isWrapper(address _wrapper) public view returns(bool) { return wrappers[_wrapper]; } } contract DFSExchangeData { // first is empty to keep the legacy order in place enum ExchangeType { _, OASIS, KYBER, UNISWAP, ZEROX } enum ActionType { SELL, BUY } struct OffchainData { address exchangeAddr; address allowanceTarget; uint256 price; uint256 protocolFee; bytes callData; } struct ExchangeData { address srcAddr; address destAddr; uint256 srcAmount; uint256 destAmount; uint256 minPrice; uint256 dfsFeeDivider; address user; address wrapper; bytes wrapperData; OffchainData offchainData; } function packExchangeData(ExchangeData memory _exData) public pure returns(bytes memory) { return abi.encode(_exData); } function unpackExchangeData(bytes memory _data) public pure returns(ExchangeData memory _exData) { _exData = abi.decode(_data, (ExchangeData)); } } contract DFSExchangeHelper { using SafeERC20 for ERC20; address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant WETH_ADDRESS = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address payable public constant WALLET_ID = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; address public constant DISCOUNT_ADDRESS = 0x1b14E8D511c9A4395425314f849bD737BAF8208F; address public constant SAVER_EXCHANGE_REGISTRY = 0x25dd3F51e0C3c3Ff164DDC02A8E4D65Bb9cBB12D; address public constant ZRX_ALLOWLIST_ADDR = 0x4BA1f38427b33B8ab7Bb0490200dAE1F1C36823F; function getDecimals(address _token) internal view returns (uint256) { if (_token == KYBER_ETH_ADDRESS) return 18; return ERC20(_token).decimals(); } function getBalance(address _tokenAddr) internal view returns (uint balance) { if (_tokenAddr == KYBER_ETH_ADDRESS) { balance = address(this).balance; } else { balance = ERC20(_tokenAddr).balanceOf(address(this)); } } function sendLeftover(address _srcAddr, address _destAddr, address payable _to) internal { // send back any leftover ether or tokens if (address(this).balance > 0) { _to.transfer(address(this).balance); } if (getBalance(_srcAddr) > 0) { ERC20(_srcAddr).safeTransfer(_to, getBalance(_srcAddr)); } if (getBalance(_destAddr) > 0) { ERC20(_destAddr).safeTransfer(_to, getBalance(_destAddr)); } } /// @notice Takes a feePercentage and sends it to wallet /// @param _amount Dai amount of the whole trade /// @param _user Address of the user /// @param _token Address of the token /// @param _dfsFeeDivider Dfs fee divider /// @return feeAmount Amount in Dai owner earned on the fee function getFee(uint256 _amount, address _user, address _token, uint256 _dfsFeeDivider) internal returns (uint256 feeAmount) { if (_dfsFeeDivider != 0 && Discount(DISCOUNT_ADDRESS).isCustomFeeSet(_user)) { _dfsFeeDivider = Discount(DISCOUNT_ADDRESS).getCustomServiceFee(_user); } if (_dfsFeeDivider == 0) { feeAmount = 0; } else { feeAmount = _amount / _dfsFeeDivider; // fee can't go over 10% of the whole amount if (feeAmount > (_amount / 10)) { feeAmount = _amount / 10; } if (_token == KYBER_ETH_ADDRESS) { WALLET_ID.transfer(feeAmount); } else { ERC20(_token).safeTransfer(WALLET_ID, feeAmount); } } } function sliceUint(bytes memory bs, uint256 start) internal pure returns (uint256) { require(bs.length >= start + 32, "slicing out of range"); uint256 x; assembly { x := mload(add(bs, add(0x20, start))) } return x; } } contract DFSPrices is DSMath { address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; enum ActionType { SELL, BUY } /// @notice Returns the best estimated price from 2 exchanges /// @param _amount Amount of source tokens you want to exchange /// @param _srcToken Address of the source token /// @param _destToken Address of the destination token /// @param _type Type of action SELL|BUY /// @param _wrappers Array of wrapper addresses to compare /// @return (address, uint) The address of the best exchange and the exchange price function getBestPrice( uint256 _amount, address _srcToken, address _destToken, ActionType _type, address[] memory _wrappers, bytes[] memory _additionalData ) public returns (address, uint256) { uint256[] memory rates = new uint256[](_wrappers.length); for (uint i=0; i<_wrappers.length; i++) { rates[i] = getExpectedRate(_wrappers[i], _srcToken, _destToken, _amount, _type, _additionalData[i]); } return getBiggestRate(_wrappers, rates); } /// @notice Return the expected rate from the exchange wrapper /// @dev In case of Oasis/Uniswap handles the different precision tokens /// @param _wrapper Address of exchange wrapper /// @param _srcToken From token /// @param _destToken To token /// @param _amount Amount to be exchanged /// @param _type Type of action SELL|BUY function getExpectedRate( address _wrapper, address _srcToken, address _destToken, uint256 _amount, ActionType _type, bytes memory _additionalData ) public returns (uint256) { bool success; bytes memory result; if (_type == ActionType.SELL) { (success, result) = _wrapper.call(abi.encodeWithSignature( "getSellRate(address,address,uint256,bytes)", _srcToken, _destToken, _amount, _additionalData )); } else { (success, result) = _wrapper.call(abi.encodeWithSignature( "getBuyRate(address,address,uint256,bytes)", _srcToken, _destToken, _amount, _additionalData )); } if (success) { return sliceUint(result, 0); } return 0; } /// @notice Finds the biggest rate between exchanges, needed for sell rate /// @param _wrappers Array of wrappers to compare /// @param _rates Array of rates to compare function getBiggestRate( address[] memory _wrappers, uint256[] memory _rates ) internal pure returns (address, uint) { uint256 maxIndex = 0; // starting from 0 in case there is only one rate in array for (uint256 i=0; i<_rates.length; i++) { if (_rates[i] > _rates[maxIndex]) { maxIndex = i; } } return (_wrappers[maxIndex], _rates[maxIndex]); } function getDecimals(address _token) internal view returns (uint256) { if (_token == KYBER_ETH_ADDRESS) return 18; return ERC20(_token).decimals(); } function sliceUint(bytes memory bs, uint256 start) internal pure returns (uint256) { require(bs.length >= start + 32, "slicing out of range"); uint256 x; assembly { x := mload(add(bs, add(0x20, start))) } return x; } } abstract contract CEtherInterface { function mint() external virtual payable; function repayBorrow() external virtual payable; } abstract contract CompoundOracleInterface { function getUnderlyingPrice(address cToken) external view virtual returns (uint); } abstract contract ComptrollerInterface { struct CompMarketState { uint224 index; uint32 block; } function claimComp(address holder) public virtual; function claimComp(address holder, address[] memory cTokens) public virtual; function claimComp(address[] memory holders, address[] memory cTokens, bool borrowers, bool suppliers) public virtual; function compSupplyState(address) public view virtual returns (CompMarketState memory); function compSupplierIndex(address,address) public view virtual returns (uint); function compAccrued(address) public view virtual returns (uint); function compBorrowState(address) public view virtual returns (CompMarketState memory); function compBorrowerIndex(address,address) public view virtual returns (uint); function enterMarkets(address[] calldata cTokens) external virtual returns (uint256[] memory); function exitMarket(address cToken) external virtual returns (uint256); function getAssetsIn(address account) external virtual view returns (address[] memory); function markets(address account) public virtual view returns (bool, uint256); function getAccountLiquidity(address account) external virtual view returns (uint256, uint256, uint256); function oracle() public virtual view returns (address); } abstract contract DSProxyInterface { /// Truffle wont compile if this isn't commented // function execute(bytes memory _code, bytes memory _data) // public virtual // payable // returns (address, bytes32); function execute(address _target, bytes memory _data) public virtual payable returns (bytes32); function setCache(address _cacheAddr) public virtual payable returns (bool); function owner() public virtual returns (address); } abstract contract DaiJoin { function vat() public virtual returns (Vat); function dai() public virtual returns (Gem); function join(address, uint) public virtual payable; function exit(address, uint) public virtual; } interface ERC20 { function totalSupply() external view returns (uint256 supply); function balanceOf(address _owner) external view returns (uint256 balance); function transfer(address _to, uint256 _value) external returns (bool success); function transferFrom(address _from, address _to, uint256 _value) external returns (bool success); function approve(address _spender, uint256 _value) external returns (bool success); function allowance(address _owner, address _spender) external view returns (uint256 remaining); function decimals() external view returns (uint256 digits); event Approval(address indexed _owner, address indexed _spender, uint256 _value); } interface ExchangeInterface { function swapEtherToToken(uint256 _ethAmount, address _tokenAddress, uint256 _maxAmount) external payable returns (uint256, uint256); function swapTokenToEther(address _tokenAddress, uint256 _amount, uint256 _maxAmount) external returns (uint256); function swapTokenToToken(address _src, address _dest, uint256 _amount) external payable returns (uint256); function getExpectedRate(address src, address dest, uint256 srcQty) external view returns (uint256 expectedRate); } interface ExchangeInterfaceV2 { function sell(address _srcAddr, address _destAddr, uint _srcAmount) external payable returns (uint); function buy(address _srcAddr, address _destAddr, uint _destAmount) external payable returns(uint); function getSellRate(address _srcAddr, address _destAddr, uint _srcAmount) external view returns (uint); function getBuyRate(address _srcAddr, address _destAddr, uint _srcAmount) external view returns (uint); } interface ExchangeInterfaceV3 { function sell(address _srcAddr, address _destAddr, uint _srcAmount, bytes memory _additionalData) external payable returns (uint); function buy(address _srcAddr, address _destAddr, uint _destAmount, bytes memory _additionalData) external payable returns(uint); function getSellRate(address _srcAddr, address _destAddr, uint _srcAmount, bytes memory _additionalData) external view returns (uint); function getBuyRate(address _srcAddr, address _destAddr, uint _srcAmount, bytes memory _additionalData) external view returns (uint); } abstract contract Flipper { function bids(uint _bidId) public virtual returns (uint256, uint256, address, uint48, uint48, address, address, uint256); function tend(uint id, uint lot, uint bid) virtual external; function dent(uint id, uint lot, uint bid) virtual external; function deal(uint id) virtual external; } abstract contract GasTokenInterface is ERC20 { function free(uint256 value) public virtual returns (bool success); function freeUpTo(uint256 value) public virtual returns (uint256 freed); function freeFrom(address from, uint256 value) public virtual returns (bool success); function freeFromUpTo(address from, uint256 value) public virtual returns (uint256 freed); } abstract contract Gem { function dec() virtual public returns (uint); function gem() virtual public returns (Gem); function join(address, uint) virtual public payable; function exit(address, uint) virtual public; function approve(address, uint) virtual public; function transfer(address, uint) virtual public returns (bool); function transferFrom(address, address, uint) virtual public returns (bool); function deposit() virtual public payable; function withdraw(uint) virtual public; function allowance(address, address) virtual public returns (uint); } abstract contract IAToken { function redeem(uint256 _amount) external virtual; function balanceOf(address _owner) external virtual view returns (uint256 balance); } abstract contract IAaveSubscription { function subscribe(uint128 _minRatio, uint128 _maxRatio, uint128 _optimalBoost, uint128 _optimalRepay, bool _boostEnabled) public virtual; function unsubscribe() public virtual; } abstract contract ICompoundSubscription { function subscribe(uint128 _minRatio, uint128 _maxRatio, uint128 _optimalBoost, uint128 _optimalRepay, bool _boostEnabled) public virtual; function unsubscribe() public virtual; } abstract contract ICompoundSubscriptions { function unsubscribe() external virtual ; } abstract contract ILendingPool { function flashLoan( address payable _receiver, address _reserve, uint _amount, bytes calldata _params) external virtual; function deposit(address _reserve, uint256 _amount, uint16 _referralCode) external virtual payable; function setUserUseReserveAsCollateral(address _reserve, bool _useAsCollateral) external virtual; function borrow(address _reserve, uint256 _amount, uint256 _interestRateMode, uint16 _referralCode) external virtual; function repay( address _reserve, uint256 _amount, address payable _onBehalfOf) external virtual payable; function swapBorrowRateMode(address _reserve) external virtual; function getReserves() external virtual view returns(address[] memory); /// @param _reserve underlying token address function getReserveData(address _reserve) external virtual view returns ( uint256 totalLiquidity, // reserve total liquidity uint256 availableLiquidity, // reserve available liquidity for borrowing uint256 totalBorrowsStable, // total amount of outstanding borrows at Stable rate uint256 totalBorrowsVariable, // total amount of outstanding borrows at Variable rate uint256 liquidityRate, // current deposit APY of the reserve for depositors, in Ray units. uint256 variableBorrowRate, // current variable rate APY of the reserve pool, in Ray units. uint256 stableBorrowRate, // current stable rate APY of the reserve pool, in Ray units. uint256 averageStableBorrowRate, // current average stable borrow rate uint256 utilizationRate, // expressed as total borrows/total liquidity. uint256 liquidityIndex, // cumulative liquidity index uint256 variableBorrowIndex, // cumulative variable borrow index address aTokenAddress, // aTokens contract address for the specific _reserve uint40 lastUpdateTimestamp // timestamp of the last update of reserve data ); /// @param _user users address function getUserAccountData(address _user) external virtual view returns ( uint256 totalLiquidityETH, // user aggregated deposits across all the reserves. In Wei uint256 totalCollateralETH, // user aggregated collateral across all the reserves. In Wei uint256 totalBorrowsETH, // user aggregated outstanding borrows across all the reserves. In Wei uint256 totalFeesETH, // user aggregated current outstanding fees in ETH. In Wei uint256 availableBorrowsETH, // user available amount to borrow in ETH uint256 currentLiquidationThreshold, // user current average liquidation threshold across all the collaterals deposited uint256 ltv, // user average Loan-to-Value between all the collaterals uint256 healthFactor // user current Health Factor ); /// @param _reserve underlying token address /// @param _user users address function getUserReserveData(address _reserve, address _user) external virtual view returns ( uint256 currentATokenBalance, // user current reserve aToken balance uint256 currentBorrowBalance, // user current reserve outstanding borrow balance uint256 principalBorrowBalance, // user balance of borrowed asset uint256 borrowRateMode, // user borrow rate mode either Stable or Variable uint256 borrowRate, // user current borrow rate APY uint256 liquidityRate, // user current earn rate on _reserve uint256 originationFee, // user outstanding loan origination fee uint256 variableBorrowIndex, // user variable cumulative index uint256 lastUpdateTimestamp, // Timestamp of the last data update bool usageAsCollateralEnabled // Whether the user's current reserve is enabled as a collateral ); function getReserveConfigurationData(address _reserve) external virtual view returns ( uint256 ltv, uint256 liquidationThreshold, uint256 liquidationBonus, address rateStrategyAddress, bool usageAsCollateralEnabled, bool borrowingEnabled, bool stableBorrowRateEnabled, bool isActive ); // ------------------ LendingPoolCoreData ------------------------ function getReserveATokenAddress(address _reserve) public virtual view returns (address); function getReserveConfiguration(address _reserve) external virtual view returns (uint256, uint256, uint256, bool); function getUserUnderlyingAssetBalance(address _reserve, address _user) public virtual view returns (uint256); function getReserveCurrentLiquidityRate(address _reserve) public virtual view returns (uint256); function getReserveCurrentVariableBorrowRate(address _reserve) public virtual view returns (uint256); function getReserveCurrentStableBorrowRate(address _reserve) public virtual view returns (uint256); function getReserveTotalLiquidity(address _reserve) public virtual view returns (uint256); function getReserveAvailableLiquidity(address _reserve) public virtual view returns (uint256); function getReserveTotalBorrowsVariable(address _reserve) public virtual view returns (uint256); // ---------------- LendingPoolDataProvider --------------------- function calculateUserGlobalData(address _user) public virtual view returns ( uint256 totalLiquidityBalanceETH, uint256 totalCollateralBalanceETH, uint256 totalBorrowBalanceETH, uint256 totalFeesETH, uint256 currentLtv, uint256 currentLiquidationThreshold, uint256 healthFactor, bool healthFactorBelowThreshold ); } abstract contract ILendingPoolAddressesProvider { function getLendingPool() public virtual view returns (address); function getLendingPoolCore() public virtual view returns (address payable); function getLendingPoolConfigurator() public virtual view returns (address); function getLendingPoolDataProvider() public virtual view returns (address); function getLendingPoolParametersProvider() public virtual view returns (address); function getTokenDistributor() public virtual view returns (address); function getFeeProvider() public virtual view returns (address); function getLendingPoolLiquidationManager() public virtual view returns (address); function getLendingPoolManager() public virtual view returns (address); function getPriceOracle() public virtual view returns (address); function getLendingRateOracle() public virtual view returns (address); } abstract contract ILoanShifter { function getLoanAmount(uint, address) public virtual returns (uint); function getUnderlyingAsset(address _addr) public view virtual returns (address); } abstract contract IMCDSubscriptions { function unsubscribe(uint256 _cdpId) external virtual ; function subscribersPos(uint256 _cdpId) external virtual returns (uint256, bool); } abstract contract IPriceOracleGetterAave { function getAssetPrice(address _asset) external virtual view returns (uint256); function getAssetsPrices(address[] calldata _assets) external virtual view returns(uint256[] memory); function getSourceOfAsset(address _asset) external virtual view returns(address); function getFallbackOracle() external virtual view returns(address); } abstract contract ITokenInterface is ERC20 { function assetBalanceOf(address _owner) public virtual view returns (uint256); function mint(address receiver, uint256 depositAmount) external virtual returns (uint256 mintAmount); function burn(address receiver, uint256 burnAmount) external virtual returns (uint256 loanAmountPaid); function tokenPrice() public virtual view returns (uint256 price); } abstract contract Join { bytes32 public ilk; function dec() virtual public view returns (uint); function gem() virtual public view returns (Gem); function join(address, uint) virtual public payable; function exit(address, uint) virtual public; } abstract contract Jug { struct Ilk { uint256 duty; uint256 rho; } mapping (bytes32 => Ilk) public ilks; function drip(bytes32) public virtual returns (uint); } abstract contract KyberNetworkProxyInterface { function maxGasPrice() external virtual view returns (uint256); function getUserCapInWei(address user) external virtual view returns (uint256); function getUserCapInTokenWei(address user, ERC20 token) external virtual view returns (uint256); function enabled() external virtual view returns (bool); function info(bytes32 id) external virtual view returns (uint256); function getExpectedRate(ERC20 src, ERC20 dest, uint256 srcQty) public virtual view returns (uint256 expectedRate, uint256 slippageRate); function tradeWithHint( ERC20 src, uint256 srcAmount, ERC20 dest, address destAddress, uint256 maxDestAmount, uint256 minConversionRate, address walletId, bytes memory hint ) public virtual payable returns (uint256); function trade( ERC20 src, uint256 srcAmount, ERC20 dest, address destAddress, uint256 maxDestAmount, uint256 minConversionRate, address walletId ) public virtual payable returns (uint256); function swapEtherToToken(ERC20 token, uint256 minConversionRate) external virtual payable returns (uint256); function swapTokenToEther(ERC20 token, uint256 tokenQty, uint256 minRate) external virtual payable returns (uint256); function swapTokenToToken(ERC20 src, uint256 srcAmount, ERC20 dest, uint256 minConversionRate) public virtual returns (uint256); } abstract contract Manager { function last(address) virtual public returns (uint); function cdpCan(address, uint, address) virtual public view returns (uint); function ilks(uint) virtual public view returns (bytes32); function owns(uint) virtual public view returns (address); function urns(uint) virtual public view returns (address); function vat() virtual public view returns (address); function open(bytes32, address) virtual public returns (uint); function give(uint, address) virtual public; function cdpAllow(uint, address, uint) virtual public; function urnAllow(address, uint) virtual public; function frob(uint, int, int) virtual public; function flux(uint, address, uint) virtual public; function move(uint, address, uint) virtual public; function exit(address, uint, address, uint) virtual public; function quit(uint, address) virtual public; function enter(address, uint) virtual public; function shift(uint, uint) virtual public; } abstract contract OasisInterface { function getBuyAmount(address tokenToBuy, address tokenToPay, uint256 amountToPay) external virtual view returns (uint256 amountBought); function getPayAmount(address tokenToPay, address tokenToBuy, uint256 amountToBuy) public virtual view returns (uint256 amountPaid); function sellAllAmount(address pay_gem, uint256 pay_amt, address buy_gem, uint256 min_fill_amount) public virtual returns (uint256 fill_amt); function buyAllAmount(address buy_gem, uint256 buy_amt, address pay_gem, uint256 max_fill_amount) public virtual returns (uint256 fill_amt); } abstract contract Osm { mapping(address => uint256) public bud; function peep() external view virtual returns (bytes32, bool); } abstract contract OsmMom { mapping (bytes32 => address) public osms; } abstract contract PipInterface { function read() public virtual returns (bytes32); } abstract contract ProxyRegistryInterface { function proxies(address _owner) public virtual view returns (address); function build(address) public virtual returns (address); } abstract contract Spotter { struct Ilk { PipInterface pip; uint256 mat; } mapping (bytes32 => Ilk) public ilks; uint256 public par; } abstract contract TokenInterface { function allowance(address, address) public virtual returns (uint256); function balanceOf(address) public virtual returns (uint256); function approve(address, uint256) public virtual; function transfer(address, uint256) public virtual returns (bool); function transferFrom(address, address, uint256) public virtual returns (bool); function deposit() public virtual payable; function withdraw(uint256) public virtual; } abstract contract UniswapExchangeInterface { function getEthToTokenInputPrice(uint256 eth_sold) external virtual view returns (uint256 tokens_bought); function getEthToTokenOutputPrice(uint256 tokens_bought) external virtual view returns (uint256 eth_sold); function getTokenToEthInputPrice(uint256 tokens_sold) external virtual view returns (uint256 eth_bought); function getTokenToEthOutputPrice(uint256 eth_bought) external virtual view returns (uint256 tokens_sold); function tokenToEthTransferInput( uint256 tokens_sold, uint256 min_eth, uint256 deadline, address recipient ) external virtual returns (uint256 eth_bought); function ethToTokenTransferInput(uint256 min_tokens, uint256 deadline, address recipient) external virtual payable returns (uint256 tokens_bought); function tokenToTokenTransferInput( uint256 tokens_sold, uint256 min_tokens_bought, uint256 min_eth_bought, uint256 deadline, address recipient, address token_addr ) external virtual returns (uint256 tokens_bought); function ethToTokenTransferOutput( uint256 tokens_bought, uint256 deadline, address recipient ) external virtual payable returns (uint256 eth_sold); function tokenToEthTransferOutput( uint256 eth_bought, uint256 max_tokens, uint256 deadline, address recipient ) external virtual returns (uint256 tokens_sold); function tokenToTokenTransferOutput( uint256 tokens_bought, uint256 max_tokens_sold, uint256 max_eth_sold, uint256 deadline, address recipient, address token_addr ) external virtual returns (uint256 tokens_sold); } abstract contract UniswapFactoryInterface { function getExchange(address token) external view virtual returns (address exchange); } abstract contract UniswapRouterInterface { function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline) external virtual returns (uint[] memory amounts); function swapExactTokensForTokens( uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline ) external virtual returns (uint[] memory amounts); function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline) external virtual returns (uint[] memory amounts); function swapTokensForExactTokens( uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline ) external virtual returns (uint[] memory amounts); function getAmountsOut(uint amountIn, address[] memory path) public virtual view returns (uint[] memory amounts); function getAmountsIn(uint amountOut, address[] memory path) public virtual view returns (uint[] memory amounts); } abstract contract Vat { struct Urn { uint256 ink; // Locked Collateral [wad] uint256 art; // Normalised Debt [wad] } struct Ilk { uint256 Art; // Total Normalised Debt [wad] uint256 rate; // Accumulated Rates [ray] uint256 spot; // Price with Safety Margin [ray] uint256 line; // Debt Ceiling [rad] uint256 dust; // Urn Debt Floor [rad] } mapping (bytes32 => mapping (address => Urn )) public urns; mapping (bytes32 => Ilk) public ilks; mapping (bytes32 => mapping (address => uint)) public gem; // [wad] function can(address, address) virtual public view returns (uint); function dai(address) virtual public view returns (uint); function frob(bytes32, address, address, address, int, int) virtual public; function hope(address) virtual public; function move(address, address, uint) virtual public; function fork(bytes32, address, address, int, int) virtual public; } contract DefisaverLogger { event LogEvent( address indexed contractAddress, address indexed caller, string indexed logName, bytes data ); // solhint-disable-next-line func-name-mixedcase function Log(address _contract, address _caller, string memory _logName, bytes memory _data) public { emit LogEvent(_contract, _caller, _logName, _data); } } contract MCDMonitorProxyV2 is AdminAuth { uint public CHANGE_PERIOD; address public monitor; address public newMonitor; address public lastMonitor; uint public changeRequestedTimestamp; mapping(address => bool) public allowed; event MonitorChangeInitiated(address oldMonitor, address newMonitor); event MonitorChangeCanceled(); event MonitorChangeFinished(address monitor); event MonitorChangeReverted(address monitor); // if someone who is allowed become malicious, owner can't be changed modifier onlyAllowed() { require(allowed[msg.sender] || msg.sender == owner); _; } modifier onlyMonitor() { require (msg.sender == monitor); _; } constructor(uint _changePeriod) public { CHANGE_PERIOD = _changePeriod * 1 days; } /// @notice Only monitor contract is able to call execute on users proxy /// @param _owner Address of cdp owner (users DSProxy address) /// @param _saverProxy Address of MCDSaverProxy /// @param _data Data to send to MCDSaverProxy function callExecute(address _owner, address _saverProxy, bytes memory _data) public payable onlyMonitor { // execute reverts if calling specific method fails DSProxyInterface(_owner).execute{value: msg.value}(_saverProxy, _data); // return if anything left if (address(this).balance > 0) { msg.sender.transfer(address(this).balance); } } /// @notice Allowed users are able to set Monitor contract without any waiting period first time /// @param _monitor Address of Monitor contract function setMonitor(address _monitor) public onlyAllowed { require(monitor == address(0)); monitor = _monitor; } /// @notice Allowed users are able to start procedure for changing monitor /// @dev after CHANGE_PERIOD needs to call confirmNewMonitor to actually make a change /// @param _newMonitor address of new monitor function changeMonitor(address _newMonitor) public onlyAllowed { require(changeRequestedTimestamp == 0); changeRequestedTimestamp = now; lastMonitor = monitor; newMonitor = _newMonitor; emit MonitorChangeInitiated(lastMonitor, newMonitor); } /// @notice At any point allowed users are able to cancel monitor change function cancelMonitorChange() public onlyAllowed { require(changeRequestedTimestamp > 0); changeRequestedTimestamp = 0; newMonitor = address(0); emit MonitorChangeCanceled(); } /// @notice Anyone is able to confirm new monitor after CHANGE_PERIOD if process is started function confirmNewMonitor() public onlyAllowed { require((changeRequestedTimestamp + CHANGE_PERIOD) < now); require(changeRequestedTimestamp != 0); require(newMonitor != address(0)); monitor = newMonitor; newMonitor = address(0); changeRequestedTimestamp = 0; emit MonitorChangeFinished(monitor); } /// @notice Its possible to revert monitor to last used monitor function revertMonitor() public onlyAllowed { require(lastMonitor != address(0)); monitor = lastMonitor; emit MonitorChangeReverted(monitor); } /// @notice Allowed users are able to add new allowed user /// @param _user Address of user that will be allowed function addAllowed(address _user) public onlyAllowed { allowed[_user] = true; } /// @notice Allowed users are able to remove allowed user /// @dev owner is always allowed even if someone tries to remove it from allowed mapping /// @param _user Address of allowed user function removeAllowed(address _user) public onlyAllowed { allowed[_user] = false; } function setChangePeriod(uint _periodInDays) public onlyAllowed { require(_periodInDays * 1 days > CHANGE_PERIOD); CHANGE_PERIOD = _periodInDays * 1 days; } } contract MCDPriceVerifier is AdminAuth { OsmMom public osmMom = OsmMom(0x76416A4d5190d071bfed309861527431304aA14f); Manager public manager = Manager(0x5ef30b9986345249bc32d8928B7ee64DE9435E39); mapping(address => bool) public authorized; function verifyVaultNextPrice(uint _nextPrice, uint _cdpId) public view returns(bool) { require(authorized[msg.sender]); bytes32 ilk = manager.ilks(_cdpId); return verifyNextPrice(_nextPrice, ilk); } function verifyNextPrice(uint _nextPrice, bytes32 _ilk) public view returns(bool) { require(authorized[msg.sender]); address osmAddress = osmMom.osms(_ilk); uint whitelisted = Osm(osmAddress).bud(address(this)); // If contracts doesn't have access return true if (whitelisted != 1) return true; (bytes32 price, bool has) = Osm(osmAddress).peep(); return has ? uint(price) == _nextPrice : false; } function setAuthorized(address _address, bool _allowed) public onlyOwner { authorized[_address] = _allowed; } } abstract contract StaticV2 { enum Method { Boost, Repay } struct CdpHolder { uint128 minRatio; uint128 maxRatio; uint128 optimalRatioBoost; uint128 optimalRatioRepay; address owner; uint cdpId; bool boostEnabled; bool nextPriceEnabled; } struct SubPosition { uint arrPos; bool subscribed; } } contract SubscriptionsInterfaceV2 { function subscribe(uint _cdpId, uint128 _minRatio, uint128 _maxRatio, uint128 _optimalBoost, uint128 _optimalRepay, bool _boostEnabled, bool _nextPriceEnabled) external {} function unsubscribe(uint _cdpId) external {} } contract SubscriptionsProxyV2 { address public constant MONITOR_PROXY_ADDRESS = 0x7456f4218874eAe1aF8B83a64848A1B89fEB7d7C; address public constant OLD_SUBSCRIPTION = 0x83152CAA0d344a2Fd428769529e2d490A88f4393; address public constant FACTORY_ADDRESS = 0x5a15566417e6C1c9546523066500bDDBc53F88C7; function migrate(uint _cdpId, uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled, bool _nextPriceEnabled, address _subscriptions) public { SubscriptionsInterfaceV2(OLD_SUBSCRIPTION).unsubscribe(_cdpId); subscribe(_cdpId, _minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled, _nextPriceEnabled, _subscriptions); } function subscribe(uint _cdpId, uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled, bool _nextPriceEnabled, address _subscriptions) public { address currAuthority = address(DSAuth(address(this)).authority()); DSGuard guard = DSGuard(currAuthority); if (currAuthority == address(0)) { guard = DSGuardFactory(FACTORY_ADDRESS).newGuard(); DSAuth(address(this)).setAuthority(DSAuthority(address(guard))); } guard.permit(MONITOR_PROXY_ADDRESS, address(this), bytes4(keccak256("execute(address,bytes)"))); SubscriptionsInterfaceV2(_subscriptions).subscribe(_cdpId, _minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled, _nextPriceEnabled); } function update(uint _cdpId, uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled, bool _nextPriceEnabled, address _subscriptions) public { SubscriptionsInterfaceV2(_subscriptions).subscribe(_cdpId, _minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled, _nextPriceEnabled); } function unsubscribe(uint _cdpId, address _subscriptions) public { SubscriptionsInterfaceV2(_subscriptions).unsubscribe(_cdpId); } } contract SubscriptionsV2 is AdminAuth, StaticV2 { bytes32 internal constant ETH_ILK = 0x4554482d41000000000000000000000000000000000000000000000000000000; bytes32 internal constant BAT_ILK = 0x4241542d41000000000000000000000000000000000000000000000000000000; address public constant MANAGER_ADDRESS = 0x5ef30b9986345249bc32d8928B7ee64DE9435E39; address public constant VAT_ADDRESS = 0x35D1b3F3D7966A1DFe207aa4514C12a259A0492B; address public constant SPOTTER_ADDRESS = 0x65C79fcB50Ca1594B025960e539eD7A9a6D434A3; CdpHolder[] public subscribers; mapping (uint => SubPosition) public subscribersPos; mapping (bytes32 => uint) public minLimits; uint public changeIndex; Manager public manager = Manager(MANAGER_ADDRESS); Vat public vat = Vat(VAT_ADDRESS); Spotter public spotter = Spotter(SPOTTER_ADDRESS); MCDSaverProxy public saverProxy; event Subscribed(address indexed owner, uint cdpId); event Unsubscribed(address indexed owner, uint cdpId); event Updated(address indexed owner, uint cdpId); event ParamUpdates(address indexed owner, uint cdpId, uint128, uint128, uint128, uint128, bool boostEnabled); /// @param _saverProxy Address of the MCDSaverProxy contract constructor(address _saverProxy) public { saverProxy = MCDSaverProxy(payable(_saverProxy)); minLimits[ETH_ILK] = 1700000000000000000; minLimits[BAT_ILK] = 1700000000000000000; } /// @dev Called by the DSProxy contract which owns the CDP /// @notice Adds the users CDP in the list of subscriptions so it can be monitored /// @param _cdpId Id of the CDP /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalBoost Ratio amount which boost should target /// @param _optimalRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled /// @param _nextPriceEnabled Boolean determing if we can use nextPrice for this cdp function subscribe(uint _cdpId, uint128 _minRatio, uint128 _maxRatio, uint128 _optimalBoost, uint128 _optimalRepay, bool _boostEnabled, bool _nextPriceEnabled) external { require(isOwner(msg.sender, _cdpId), "Must be called by Cdp owner"); // if boost is not enabled, set max ratio to max uint uint128 localMaxRatio = _boostEnabled ? _maxRatio : uint128(-1); require(checkParams(manager.ilks(_cdpId), _minRatio, localMaxRatio), "Must be correct params"); SubPosition storage subInfo = subscribersPos[_cdpId]; CdpHolder memory subscription = CdpHolder({ minRatio: _minRatio, maxRatio: localMaxRatio, optimalRatioBoost: _optimalBoost, optimalRatioRepay: _optimalRepay, owner: msg.sender, cdpId: _cdpId, boostEnabled: _boostEnabled, nextPriceEnabled: _nextPriceEnabled }); changeIndex++; if (subInfo.subscribed) { subscribers[subInfo.arrPos] = subscription; emit Updated(msg.sender, _cdpId); emit ParamUpdates(msg.sender, _cdpId, _minRatio, localMaxRatio, _optimalBoost, _optimalRepay, _boostEnabled); } else { subscribers.push(subscription); subInfo.arrPos = subscribers.length - 1; subInfo.subscribed = true; emit Subscribed(msg.sender, _cdpId); } } /// @notice Called by the users DSProxy /// @dev Owner who subscribed cancels his subscription function unsubscribe(uint _cdpId) external { require(isOwner(msg.sender, _cdpId), "Must be called by Cdp owner"); _unsubscribe(_cdpId); } /// @dev Checks if the _owner is the owner of the CDP function isOwner(address _owner, uint _cdpId) internal view returns (bool) { return getOwner(_cdpId) == _owner; } /// @dev Checks limit for minimum ratio and if minRatio is bigger than max function checkParams(bytes32 _ilk, uint128 _minRatio, uint128 _maxRatio) internal view returns (bool) { if (_minRatio < minLimits[_ilk]) { return false; } if (_minRatio > _maxRatio) { return false; } return true; } /// @dev Internal method to remove a subscriber from the list function _unsubscribe(uint _cdpId) internal { require(subscribers.length > 0, "Must have subscribers in the list"); SubPosition storage subInfo = subscribersPos[_cdpId]; require(subInfo.subscribed, "Must first be subscribed"); uint lastCdpId = subscribers[subscribers.length - 1].cdpId; SubPosition storage subInfo2 = subscribersPos[lastCdpId]; subInfo2.arrPos = subInfo.arrPos; subscribers[subInfo.arrPos] = subscribers[subscribers.length - 1]; subscribers.pop(); changeIndex++; subInfo.subscribed = false; subInfo.arrPos = 0; emit Unsubscribed(msg.sender, _cdpId); } /// @notice Returns an address that owns the CDP /// @param _cdpId Id of the CDP function getOwner(uint _cdpId) public view returns(address) { return manager.owns(_cdpId); } /// @notice Helper method for the front to get all the info about the subscribed CDP function getSubscribedInfo(uint _cdpId) public view returns(bool, uint128, uint128, uint128, uint128, address, uint coll, uint debt) { SubPosition memory subInfo = subscribersPos[_cdpId]; if (!subInfo.subscribed) return (false, 0, 0, 0, 0, address(0), 0, 0); (coll, debt) = saverProxy.getCdpInfo(manager, _cdpId, manager.ilks(_cdpId)); CdpHolder memory subscriber = subscribers[subInfo.arrPos]; return ( true, subscriber.minRatio, subscriber.maxRatio, subscriber.optimalRatioRepay, subscriber.optimalRatioBoost, subscriber.owner, coll, debt ); } function getCdpHolder(uint _cdpId) public view returns (bool subscribed, CdpHolder memory) { SubPosition memory subInfo = subscribersPos[_cdpId]; if (!subInfo.subscribed) return (false, CdpHolder(0, 0, 0, 0, address(0), 0, false, false)); CdpHolder memory subscriber = subscribers[subInfo.arrPos]; return (true, subscriber); } /// @notice Helper method for the front to get the information about the ilk of a CDP function getIlkInfo(bytes32 _ilk, uint _cdpId) public view returns(bytes32 ilk, uint art, uint rate, uint spot, uint line, uint dust, uint mat, uint par) { // send either ilk or cdpId if (_ilk == bytes32(0)) { _ilk = manager.ilks(_cdpId); } ilk = _ilk; (,mat) = spotter.ilks(_ilk); par = spotter.par(); (art, rate, spot, line, dust) = vat.ilks(_ilk); } /// @notice Helper method to return all the subscribed CDPs function getSubscribers() public view returns (CdpHolder[] memory) { return subscribers; } /// @notice Helper method to return all the subscribed CDPs function getSubscribersByPage(uint _page, uint _perPage) public view returns (CdpHolder[] memory) { CdpHolder[] memory holders = new CdpHolder[](_perPage); uint start = _page * _perPage; uint end = start + _perPage; uint count = 0; for (uint i=start; i<end; i++) { holders[count] = subscribers[i]; count++; } return holders; } ////////////// ADMIN METHODS /////////////////// /// @notice Admin function to change a min. limit for an asset function changeMinRatios(bytes32 _ilk, uint _newRatio) public onlyOwner { minLimits[_ilk] = _newRatio; } /// @notice Admin function to unsubscribe a CDP function unsubscribeByAdmin(uint _cdpId) public onlyOwner { SubPosition storage subInfo = subscribersPos[_cdpId]; if (subInfo.subscribed) { _unsubscribe(_cdpId); } } } contract BidProxy { address public constant DAI_JOIN = 0x9759A6Ac90977b93B58547b4A71c78317f391A28; address public constant VAT_ADDRESS = 0x35D1b3F3D7966A1DFe207aa4514C12a259A0492B; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; function daiBid(uint _bidId, uint _amount, address _flipper) public { uint tendAmount = _amount * (10 ** 27); joinDai(_amount); (, uint lot, , , , , , ) = Flipper(_flipper).bids(_bidId); Vat(VAT_ADDRESS).hope(_flipper); Flipper(_flipper).tend(_bidId, lot, tendAmount); } function collateralBid(uint _bidId, uint _amount, address _flipper) public { (uint bid, , , , , , , ) = Flipper(_flipper).bids(_bidId); joinDai(bid / (10**27)); Vat(VAT_ADDRESS).hope(_flipper); Flipper(_flipper).dent(_bidId, _amount, bid); } function closeBid(uint _bidId, address _flipper, address _joinAddr) public { bytes32 ilk = Join(_joinAddr).ilk(); Flipper(_flipper).deal(_bidId); uint amount = Vat(VAT_ADDRESS).gem(ilk, address(this)); Vat(VAT_ADDRESS).hope(_joinAddr); Gem(_joinAddr).exit(msg.sender, amount); } function exitCollateral(address _joinAddr) public { bytes32 ilk = Join(_joinAddr).ilk(); uint amount = Vat(VAT_ADDRESS).gem(ilk, address(this)); Vat(VAT_ADDRESS).hope(_joinAddr); Gem(_joinAddr).exit(msg.sender, amount); } function exitDai() public { uint amount = Vat(VAT_ADDRESS).dai(address(this)) / (10**27); Vat(VAT_ADDRESS).hope(DAI_JOIN); Gem(DAI_JOIN).exit(msg.sender, amount); } function withdrawToken(address _token) public { uint balance = ERC20(_token).balanceOf(address(this)); ERC20(_token).transfer(msg.sender, balance); } function withdrawEth() public { uint balance = address(this).balance; msg.sender.transfer(balance); } function joinDai(uint _amount) internal { uint amountInVat = Vat(VAT_ADDRESS).dai(address(this)) / (10**27); if (_amount > amountInVat) { uint amountDiff = (_amount - amountInVat) + 1; ERC20(DAI_ADDRESS).transferFrom(msg.sender, address(this), amountDiff); ERC20(DAI_ADDRESS).approve(DAI_JOIN, amountDiff); Join(DAI_JOIN).join(address(this), amountDiff); } } } abstract contract IMCDSubscriptions { function unsubscribe(uint256 _cdpId) external virtual ; function subscribersPos(uint256 _cdpId) external virtual returns (uint256, bool); } abstract contract GemLike { function approve(address, uint256) public virtual; function transfer(address, uint256) public virtual; function transferFrom(address, address, uint256) public virtual; function deposit() public virtual payable; function withdraw(uint256) public virtual; } abstract contract ManagerLike { function cdpCan(address, uint256, address) public virtual view returns (uint256); function ilks(uint256) public virtual view returns (bytes32); function owns(uint256) public virtual view returns (address); function urns(uint256) public virtual view returns (address); function vat() public virtual view returns (address); function open(bytes32, address) public virtual returns (uint256); function give(uint256, address) public virtual; function cdpAllow(uint256, address, uint256) public virtual; function urnAllow(address, uint256) public virtual; function frob(uint256, int256, int256) public virtual; function flux(uint256, address, uint256) public virtual; function move(uint256, address, uint256) public virtual; function exit(address, uint256, address, uint256) public virtual; function quit(uint256, address) public virtual; function enter(address, uint256) public virtual; function shift(uint256, uint256) public virtual; } abstract contract VatLike { function can(address, address) public virtual view returns (uint256); function ilks(bytes32) public virtual view returns (uint256, uint256, uint256, uint256, uint256); function dai(address) public virtual view returns (uint256); function urns(bytes32, address) public virtual view returns (uint256, uint256); function frob(bytes32, address, address, address, int256, int256) public virtual; function hope(address) public virtual; function move(address, address, uint256) public virtual; } abstract contract GemJoinLike { function dec() public virtual returns (uint256); function gem() public virtual returns (GemLike); function join(address, uint256) public virtual payable; function exit(address, uint256) public virtual; } abstract contract GNTJoinLike { function bags(address) public virtual view returns (address); function make(address) public virtual returns (address); } abstract contract DaiJoinLike { function vat() public virtual returns (VatLike); function dai() public virtual returns (GemLike); function join(address, uint256) public virtual payable; function exit(address, uint256) public virtual; } abstract contract HopeLike { function hope(address) public virtual; function nope(address) public virtual; } abstract contract ProxyRegistryInterface { function build(address) public virtual returns (address); } abstract contract EndLike { function fix(bytes32) public virtual view returns (uint256); function cash(bytes32, uint256) public virtual; function free(bytes32) public virtual; function pack(uint256) public virtual; function skim(bytes32, address) public virtual; } abstract contract JugLike { function drip(bytes32) public virtual returns (uint256); } abstract contract PotLike { function pie(address) public virtual view returns (uint256); function drip() public virtual returns (uint256); function join(uint256) public virtual; function exit(uint256) public virtual; } abstract contract ProxyRegistryLike { function proxies(address) public virtual view returns (address); function build(address) public virtual returns (address); } abstract contract ProxyLike { function owner() public virtual view returns (address); } contract Common { uint256 constant RAY = 10**27; // Internal functions function mul(uint256 x, uint256 y) internal pure returns (uint256 z) { require(y == 0 || (z = x * y) / y == x, "mul-overflow"); } // Public functions // solhint-disable-next-line func-name-mixedcase function daiJoin_join(address apt, address urn, uint256 wad) public { // Gets DAI from the user's wallet DaiJoinLike(apt).dai().transferFrom(msg.sender, address(this), wad); // Approves adapter to take the DAI amount DaiJoinLike(apt).dai().approve(apt, wad); // Joins DAI into the vat DaiJoinLike(apt).join(urn, wad); } } contract MCDCreateProxyActions is Common { // Internal functions function sub(uint256 x, uint256 y) internal pure returns (uint256 z) { require((z = x - y) <= x, "sub-overflow"); } function toInt(uint256 x) internal pure returns (int256 y) { y = int256(x); require(y >= 0, "int-overflow"); } function toRad(uint256 wad) internal pure returns (uint256 rad) { rad = mul(wad, 10**27); } function convertTo18(address gemJoin, uint256 amt) internal returns (uint256 wad) { // For those collaterals that have less than 18 decimals precision we need to do the conversion before passing to frob function // Adapters will automatically handle the difference of precision wad = mul(amt, 10**(18 - GemJoinLike(gemJoin).dec())); } function _getDrawDart(address vat, address jug, address urn, bytes32 ilk, uint256 wad) internal returns (int256 dart) { // Updates stability fee rate uint256 rate = JugLike(jug).drip(ilk); // Gets DAI balance of the urn in the vat uint256 dai = VatLike(vat).dai(urn); // If there was already enough DAI in the vat balance, just exits it without adding more debt if (dai < mul(wad, RAY)) { // Calculates the needed dart so together with the existing dai in the vat is enough to exit wad amount of DAI tokens dart = toInt(sub(mul(wad, RAY), dai) / rate); // This is neeeded due lack of precision. It might need to sum an extra dart wei (for the given DAI wad amount) dart = mul(uint256(dart), rate) < mul(wad, RAY) ? dart + 1 : dart; } } function _getWipeDart(address vat, uint256 dai, address urn, bytes32 ilk) internal view returns (int256 dart) { // Gets actual rate from the vat (, uint256 rate, , , ) = VatLike(vat).ilks(ilk); // Gets actual art value of the urn (, uint256 art) = VatLike(vat).urns(ilk, urn); // Uses the whole dai balance in the vat to reduce the debt dart = toInt(dai / rate); // Checks the calculated dart is not higher than urn.art (total debt), otherwise uses its value dart = uint256(dart) <= art ? -dart : -toInt(art); } function _getWipeAllWad(address vat, address usr, address urn, bytes32 ilk) internal view returns (uint256 wad) { // Gets actual rate from the vat (, uint256 rate, , , ) = VatLike(vat).ilks(ilk); // Gets actual art value of the urn (, uint256 art) = VatLike(vat).urns(ilk, urn); // Gets actual dai amount in the urn uint256 dai = VatLike(vat).dai(usr); uint256 rad = sub(mul(art, rate), dai); wad = rad / RAY; // If the rad precision has some dust, it will need to request for 1 extra wad wei wad = mul(wad, RAY) < rad ? wad + 1 : wad; } // Public functions function transfer(address gem, address dst, uint256 wad) public { GemLike(gem).transfer(dst, wad); } // solhint-disable-next-line func-name-mixedcase function ethJoin_join(address apt, address urn) public payable { // Wraps ETH in WETH GemJoinLike(apt).gem().deposit{value: msg.value}(); // Approves adapter to take the WETH amount GemJoinLike(apt).gem().approve(address(apt), msg.value); // Joins WETH collateral into the vat GemJoinLike(apt).join(urn, msg.value); } // solhint-disable-next-line func-name-mixedcase function gemJoin_join(address apt, address urn, uint256 wad, bool transferFrom) public { // Only executes for tokens that have approval/transferFrom implementation if (transferFrom) { // Gets token from the user's wallet GemJoinLike(apt).gem().transferFrom(msg.sender, address(this), wad); // Approves adapter to take the token amount GemJoinLike(apt).gem().approve(apt, 0); GemJoinLike(apt).gem().approve(apt, wad); } // Joins token collateral into the vat GemJoinLike(apt).join(urn, wad); } function hope(address obj, address usr) public { HopeLike(obj).hope(usr); } function nope(address obj, address usr) public { HopeLike(obj).nope(usr); } function open(address manager, bytes32 ilk, address usr) public returns (uint256 cdp) { cdp = ManagerLike(manager).open(ilk, usr); } function give(address manager, uint256 cdp, address usr) public { ManagerLike(manager).give(cdp, usr); } function move(address manager, uint256 cdp, address dst, uint256 rad) public { ManagerLike(manager).move(cdp, dst, rad); } function frob(address manager, uint256 cdp, int256 dink, int256 dart) public { ManagerLike(manager).frob(cdp, dink, dart); } function lockETH(address manager, address ethJoin, uint256 cdp) public payable { // Receives ETH amount, converts it to WETH and joins it into the vat ethJoin_join(ethJoin, address(this)); // Locks WETH amount into the CDP VatLike(ManagerLike(manager).vat()).frob( ManagerLike(manager).ilks(cdp), ManagerLike(manager).urns(cdp), address(this), address(this), toInt(msg.value), 0 ); } function lockGem(address manager, address gemJoin, uint256 cdp, uint256 wad, bool transferFrom) public { // Takes token amount from user's wallet and joins into the vat gemJoin_join(gemJoin, address(this), wad, transferFrom); // Locks token amount into the CDP VatLike(ManagerLike(manager).vat()).frob( ManagerLike(manager).ilks(cdp), ManagerLike(manager).urns(cdp), address(this), address(this), toInt(convertTo18(gemJoin, wad)), 0 ); } function draw(address manager, address jug, address daiJoin, uint256 cdp, uint256 wad) public { address urn = ManagerLike(manager).urns(cdp); address vat = ManagerLike(manager).vat(); bytes32 ilk = ManagerLike(manager).ilks(cdp); // Generates debt in the CDP frob(manager, cdp, 0, _getDrawDart(vat, jug, urn, ilk, wad)); // Moves the DAI amount (balance in the vat in rad) to proxy's address move(manager, cdp, address(this), toRad(wad)); // Allows adapter to access to proxy's DAI balance in the vat if (VatLike(vat).can(address(this), address(daiJoin)) == 0) { VatLike(vat).hope(daiJoin); } // Exits DAI to the user's wallet as a token DaiJoinLike(daiJoin).exit(msg.sender, wad); } function lockETHAndDraw( address manager, address jug, address ethJoin, address daiJoin, uint256 cdp, uint256 wadD ) public payable { address urn = ManagerLike(manager).urns(cdp); address vat = ManagerLike(manager).vat(); bytes32 ilk = ManagerLike(manager).ilks(cdp); // Receives ETH amount, converts it to WETH and joins it into the vat ethJoin_join(ethJoin, urn); // Locks WETH amount into the CDP and generates debt frob(manager, cdp, toInt(msg.value), _getDrawDart(vat, jug, urn, ilk, wadD)); // Moves the DAI amount (balance in the vat in rad) to proxy's address move(manager, cdp, address(this), toRad(wadD)); // Allows adapter to access to proxy's DAI balance in the vat if (VatLike(vat).can(address(this), address(daiJoin)) == 0) { VatLike(vat).hope(daiJoin); } // Exits DAI to the user's wallet as a token DaiJoinLike(daiJoin).exit(msg.sender, wadD); } function openLockETHAndDraw( address manager, address jug, address ethJoin, address daiJoin, bytes32 ilk, uint256 wadD, address owner ) public payable returns (uint256 cdp) { cdp = open(manager, ilk, address(this)); lockETHAndDraw(manager, jug, ethJoin, daiJoin, cdp, wadD); give(manager, cdp, owner); } function lockGemAndDraw( address manager, address jug, address gemJoin, address daiJoin, uint256 cdp, uint256 wadC, uint256 wadD, bool transferFrom ) public { address urn = ManagerLike(manager).urns(cdp); address vat = ManagerLike(manager).vat(); bytes32 ilk = ManagerLike(manager).ilks(cdp); // Takes token amount from user's wallet and joins into the vat gemJoin_join(gemJoin, urn, wadC, transferFrom); // Locks token amount into the CDP and generates debt frob( manager, cdp, toInt(convertTo18(gemJoin, wadC)), _getDrawDart(vat, jug, urn, ilk, wadD) ); // Moves the DAI amount (balance in the vat in rad) to proxy's address move(manager, cdp, address(this), toRad(wadD)); // Allows adapter to access to proxy's DAI balance in the vat if (VatLike(vat).can(address(this), address(daiJoin)) == 0) { VatLike(vat).hope(daiJoin); } // Exits DAI to the user's wallet as a token DaiJoinLike(daiJoin).exit(msg.sender, wadD); } function openLockGemAndDraw( address manager, address jug, address gemJoin, address daiJoin, bytes32 ilk, uint256 wadC, uint256 wadD, bool transferFrom, address owner ) public returns (uint256 cdp) { cdp = open(manager, ilk, address(this)); lockGemAndDraw(manager, jug, gemJoin, daiJoin, cdp, wadC, wadD, transferFrom); give(manager, cdp, owner); } } contract MCDCreateTaker { using SafeERC20 for ERC20; address payable public constant MCD_CREATE_FLASH_LOAN = 0x78aF7A2Ee6C2240c748aDdc42aBc9A693559dcaF; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); // solhint-disable-next-line const-name-snakecase Manager public constant manager = Manager(0x5ef30b9986345249bc32d8928B7ee64DE9435E39); // solhint-disable-next-line const-name-snakecase DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); struct CreateData { uint collAmount; uint daiAmount; address joinAddr; } function openWithLoan( SaverExchangeCore.ExchangeData memory _exchangeData, CreateData memory _createData ) public payable { MCD_CREATE_FLASH_LOAN.transfer(msg.value); //0x fee if (!isEthJoinAddr(_createData.joinAddr)) { ERC20(getCollateralAddr(_createData.joinAddr)).safeTransferFrom(msg.sender, address(this), _createData.collAmount); ERC20(getCollateralAddr(_createData.joinAddr)).safeTransfer(MCD_CREATE_FLASH_LOAN, _createData.collAmount); } (uint[6] memory numData, address[5] memory addrData, bytes memory callData) = _packData(_createData, _exchangeData); bytes memory paramsData = abi.encode(numData, addrData, callData, address(this)); lendingPool.flashLoan(MCD_CREATE_FLASH_LOAN, DAI_ADDRESS, _createData.daiAmount, paramsData); logger.Log(address(this), msg.sender, "MCDCreate", abi.encode(manager.last(address(this)), _createData.collAmount, _createData.daiAmount)); } function getCollateralAddr(address _joinAddr) internal view returns (address) { return address(Join(_joinAddr).gem()); } /// @notice Checks if the join address is one of the Ether coll. types /// @param _joinAddr Join address to check function isEthJoinAddr(address _joinAddr) internal view returns (bool) { // if it's dai_join_addr don't check gem() it will fail if (_joinAddr == 0x9759A6Ac90977b93B58547b4A71c78317f391A28) return false; // if coll is weth it's and eth type coll if (address(Join(_joinAddr).gem()) == 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2) { return true; } return false; } function _packData( CreateData memory _createData, SaverExchangeCore.ExchangeData memory exchangeData ) internal pure returns (uint[6] memory numData, address[5] memory addrData, bytes memory callData) { numData = [ _createData.collAmount, _createData.daiAmount, exchangeData.srcAmount, exchangeData.destAmount, exchangeData.minPrice, exchangeData.price0x ]; addrData = [ exchangeData.srcAddr, exchangeData.destAddr, exchangeData.exchangeAddr, exchangeData.wrapper, _createData.joinAddr ]; callData = exchangeData.callData; } } contract MCDSaverProxyHelper is DSMath { /// @notice Returns a normalized debt _amount based on the current rate /// @param _amount Amount of dai to be normalized /// @param _rate Current rate of the stability fee /// @param _daiVatBalance Balance od Dai in the Vat for that CDP function normalizeDrawAmount(uint _amount, uint _rate, uint _daiVatBalance) internal pure returns (int dart) { if (_daiVatBalance < mul(_amount, RAY)) { dart = toPositiveInt(sub(mul(_amount, RAY), _daiVatBalance) / _rate); dart = mul(uint(dart), _rate) < mul(_amount, RAY) ? dart + 1 : dart; } } /// @notice Converts a number to Rad percision /// @param _wad The input number in wad percision function toRad(uint _wad) internal pure returns (uint) { return mul(_wad, 10 ** 27); } /// @notice Converts a number to 18 decimal percision /// @param _joinAddr Join address of the collateral /// @param _amount Number to be converted function convertTo18(address _joinAddr, uint256 _amount) internal view returns (uint256) { return mul(_amount, 10 ** (18 - Join(_joinAddr).dec())); } /// @notice Converts a uint to int and checks if positive /// @param _x Number to be converted function toPositiveInt(uint _x) internal pure returns (int y) { y = int(_x); require(y >= 0, "int-overflow"); } /// @notice Gets Dai amount in Vat which can be added to Cdp /// @param _vat Address of Vat contract /// @param _urn Urn of the Cdp /// @param _ilk Ilk of the Cdp function normalizePaybackAmount(address _vat, address _urn, bytes32 _ilk) internal view returns (int amount) { uint dai = Vat(_vat).dai(_urn); (, uint rate,,,) = Vat(_vat).ilks(_ilk); (, uint art) = Vat(_vat).urns(_ilk, _urn); amount = toPositiveInt(dai / rate); amount = uint(amount) <= art ? - amount : - toPositiveInt(art); } /// @notice Gets the whole debt of the CDP /// @param _vat Address of Vat contract /// @param _usr Address of the Dai holder /// @param _urn Urn of the Cdp /// @param _ilk Ilk of the Cdp function getAllDebt(address _vat, address _usr, address _urn, bytes32 _ilk) internal view returns (uint daiAmount) { (, uint rate,,,) = Vat(_vat).ilks(_ilk); (, uint art) = Vat(_vat).urns(_ilk, _urn); uint dai = Vat(_vat).dai(_usr); uint rad = sub(mul(art, rate), dai); daiAmount = rad / RAY; daiAmount = mul(daiAmount, RAY) < rad ? daiAmount + 1 : daiAmount; } /// @notice Gets the token address from the Join contract /// @param _joinAddr Address of the Join contract function getCollateralAddr(address _joinAddr) internal view returns (address) { return address(Join(_joinAddr).gem()); } /// @notice Checks if the join address is one of the Ether coll. types /// @param _joinAddr Join address to check function isEthJoinAddr(address _joinAddr) internal view returns (bool) { // if it's dai_join_addr don't check gem() it will fail if (_joinAddr == 0x9759A6Ac90977b93B58547b4A71c78317f391A28) return false; // if coll is weth it's and eth type coll if (address(Join(_joinAddr).gem()) == 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2) { return true; } return false; } /// @notice Gets CDP info (collateral, debt) /// @param _manager Manager contract /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP function getCdpInfo(Manager _manager, uint _cdpId, bytes32 _ilk) public view returns (uint, uint) { address vat = _manager.vat(); address urn = _manager.urns(_cdpId); (uint collateral, uint debt) = Vat(vat).urns(_ilk, urn); (,uint rate,,,) = Vat(vat).ilks(_ilk); return (collateral, rmul(debt, rate)); } /// @notice Address that owns the DSProxy that owns the CDP /// @param _manager Manager contract /// @param _cdpId Id of the CDP function getOwner(Manager _manager, uint _cdpId) public view returns (address) { DSProxy proxy = DSProxy(uint160(_manager.owns(_cdpId))); return proxy.owner(); } } abstract contract ProtocolInterface { function deposit(address _user, uint256 _amount) public virtual; function withdraw(address _user, uint256 _amount) public virtual; } contract SavingsLogger { event Deposit(address indexed sender, uint8 protocol, uint256 amount); event Withdraw(address indexed sender, uint8 protocol, uint256 amount); event Swap(address indexed sender, uint8 fromProtocol, uint8 toProtocol, uint256 amount); function logDeposit(address _sender, uint8 _protocol, uint256 _amount) external { emit Deposit(_sender, _protocol, _amount); } function logWithdraw(address _sender, uint8 _protocol, uint256 _amount) external { emit Withdraw(_sender, _protocol, _amount); } function logSwap(address _sender, uint8 _protocolFrom, uint8 _protocolTo, uint256 _amount) external { emit Swap(_sender, _protocolFrom, _protocolTo, _amount); } } contract AaveSavingsProtocol is ProtocolInterface, DSAuth { address public constant ADAI_ADDRESS = 0xfC1E690f61EFd961294b3e1Ce3313fBD8aa4f85d; address public constant AAVE_LENDING_POOL = 0x398eC7346DcD622eDc5ae82352F02bE94C62d119; address public constant AAVE_LENDING_POOL_CORE = 0x3dfd23A6c5E8BbcFc9581d2E864a68feb6a076d3; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; function deposit(address _user, uint _amount) public override { require(msg.sender == _user); // get dai from user require(ERC20(DAI_ADDRESS).transferFrom(_user, address(this), _amount)); ERC20(DAI_ADDRESS).approve(AAVE_LENDING_POOL_CORE, uint(-1)); ILendingPool(AAVE_LENDING_POOL).deposit(DAI_ADDRESS, _amount, 0); ERC20(ADAI_ADDRESS).transfer(_user, ERC20(ADAI_ADDRESS).balanceOf(address(this))); } function withdraw(address _user, uint _amount) public override { require(msg.sender == _user); require(ERC20(ADAI_ADDRESS).transferFrom(_user, address(this), _amount)); IAToken(ADAI_ADDRESS).redeem(_amount); // return dai we have to user ERC20(DAI_ADDRESS).transfer(_user, _amount); } } contract CompoundSavingsProtocol { address public constant NEW_CDAI_ADDRESS = 0x5d3a536E4D6DbD6114cc1Ead35777bAB948E3643; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; CTokenInterface public constant cDaiContract = CTokenInterface(NEW_CDAI_ADDRESS); function compDeposit(address _user, uint _amount) internal { // get dai from user require(ERC20(DAI_ADDRESS).transferFrom(_user, address(this), _amount)); // mainnet only ERC20(DAI_ADDRESS).approve(NEW_CDAI_ADDRESS, uint(-1)); // mint cDai require(cDaiContract.mint(_amount) == 0, "Failed Mint"); } function compWithdraw(address _user, uint _amount) internal { // transfer all users balance to this contract require(cDaiContract.transferFrom(_user, address(this), ERC20(NEW_CDAI_ADDRESS).balanceOf(_user))); // approve cDai to compound contract cDaiContract.approve(NEW_CDAI_ADDRESS, uint(-1)); // get dai from cDai contract require(cDaiContract.redeemUnderlying(_amount) == 0, "Reedem Failed"); // return to user balance we didn't spend uint cDaiBalance = cDaiContract.balanceOf(address(this)); if (cDaiBalance > 0) { cDaiContract.transfer(_user, cDaiBalance); } // return dai we have to user ERC20(DAI_ADDRESS).transfer(_user, _amount); } } abstract contract VatLike { function can(address, address) virtual public view returns (uint); function ilks(bytes32) virtual public view returns (uint, uint, uint, uint, uint); function dai(address) virtual public view returns (uint); function urns(bytes32, address) virtual public view returns (uint, uint); function frob(bytes32, address, address, address, int, int) virtual public; function hope(address) virtual public; function move(address, address, uint) virtual public; } abstract contract PotLike { function pie(address) virtual public view returns (uint); function drip() virtual public returns (uint); function join(uint) virtual public; function exit(uint) virtual public; } abstract contract GemLike { function approve(address, uint) virtual public; function transfer(address, uint) virtual public; function transferFrom(address, address, uint) virtual public; function deposit() virtual public payable; function withdraw(uint) virtual public; } abstract contract DaiJoinLike { function vat() virtual public returns (VatLike); function dai() virtual public returns (GemLike); function join(address, uint) virtual public payable; function exit(address, uint) virtual public; } contract DSRSavingsProtocol is DSMath { // Mainnet address public constant POT_ADDRESS = 0x197E90f9FAD81970bA7976f33CbD77088E5D7cf7; address public constant DAI_JOIN_ADDRESS = 0x9759A6Ac90977b93B58547b4A71c78317f391A28; function dsrDeposit(uint _amount, bool _fromUser) internal { VatLike vat = DaiJoinLike(DAI_JOIN_ADDRESS).vat(); uint chi = PotLike(POT_ADDRESS).drip(); daiJoin_join(DAI_JOIN_ADDRESS, address(this), _amount, _fromUser); if (vat.can(address(this), address(POT_ADDRESS)) == 0) { vat.hope(POT_ADDRESS); } PotLike(POT_ADDRESS).join(mul(_amount, RAY) / chi); } function dsrWithdraw(uint _amount, bool _toUser) internal { VatLike vat = DaiJoinLike(DAI_JOIN_ADDRESS).vat(); uint chi = PotLike(POT_ADDRESS).drip(); uint pie = mul(_amount, RAY) / chi; PotLike(POT_ADDRESS).exit(pie); uint balance = DaiJoinLike(DAI_JOIN_ADDRESS).vat().dai(address(this)); if (vat.can(address(this), address(DAI_JOIN_ADDRESS)) == 0) { vat.hope(DAI_JOIN_ADDRESS); } address to; if (_toUser) { to = msg.sender; } else { to = address(this); } if (_amount == uint(-1)) { DaiJoinLike(DAI_JOIN_ADDRESS).exit(to, mul(chi, pie) / RAY); } else { DaiJoinLike(DAI_JOIN_ADDRESS).exit( to, balance >= mul(_amount, RAY) ? _amount : balance / RAY ); } } function daiJoin_join(address apt, address urn, uint wad, bool _fromUser) internal { if (_fromUser) { DaiJoinLike(apt).dai().transferFrom(msg.sender, address(this), wad); } DaiJoinLike(apt).dai().approve(apt, wad); DaiJoinLike(apt).join(urn, wad); } } contract DydxSavingsProtocol is ProtocolInterface, DSAuth { address public constant SOLO_MARGIN_ADDRESS = 0x1E0447b19BB6EcFdAe1e4AE1694b0C3659614e4e; ISoloMargin public soloMargin; address public savingsProxy; uint daiMarketId = 3; constructor() public { soloMargin = ISoloMargin(SOLO_MARGIN_ADDRESS); } function addSavingsProxy(address _savingsProxy) public auth { savingsProxy = _savingsProxy; } function deposit(address _user, uint _amount) public override { require(msg.sender == _user); Account.Info[] memory accounts = new Account.Info[](1); accounts[0] = getAccount(_user, 0); Actions.ActionArgs[] memory actions = new Actions.ActionArgs[](1); Types.AssetAmount memory amount = Types.AssetAmount({ sign: true, denomination: Types.AssetDenomination.Wei, ref: Types.AssetReference.Delta, value: _amount }); actions[0] = Actions.ActionArgs({ actionType: Actions.ActionType.Deposit, accountId: 0, amount: amount, primaryMarketId: daiMarketId, otherAddress: _user, secondaryMarketId: 0, //not used otherAccountId: 0, //not used data: "" //not used }); soloMargin.operate(accounts, actions); } function withdraw(address _user, uint _amount) public override { require(msg.sender == _user); Account.Info[] memory accounts = new Account.Info[](1); accounts[0] = getAccount(_user, 0); Actions.ActionArgs[] memory actions = new Actions.ActionArgs[](1); Types.AssetAmount memory amount = Types.AssetAmount({ sign: false, denomination: Types.AssetDenomination.Wei, ref: Types.AssetReference.Delta, value: _amount }); actions[0] = Actions.ActionArgs({ actionType: Actions.ActionType.Withdraw, accountId: 0, amount: amount, primaryMarketId: daiMarketId, otherAddress: _user, secondaryMarketId: 0, //not used otherAccountId: 0, //not used data: "" //not used }); soloMargin.operate(accounts, actions); } function getWeiBalance(address _user, uint _index) public view returns(Types.Wei memory) { Types.Wei[] memory weiBalances; (,,weiBalances) = soloMargin.getAccountBalances(getAccount(_user, _index)); return weiBalances[daiMarketId]; } function getParBalance(address _user, uint _index) public view returns(Types.Par memory) { Types.Par[] memory parBalances; (,parBalances,) = soloMargin.getAccountBalances(getAccount(_user, _index)); return parBalances[daiMarketId]; } function getAccount(address _user, uint _index) public pure returns(Account.Info memory) { Account.Info memory account = Account.Info({ owner: _user, number: _index }); return account; } } abstract contract ISoloMargin { struct OperatorArg { address operator; bool trusted; } function operate( Account.Info[] memory accounts, Actions.ActionArgs[] memory actions ) public virtual; function getAccountBalances( Account.Info memory account ) public view virtual returns ( address[] memory, Types.Par[] memory, Types.Wei[] memory ); function setOperators( OperatorArg[] memory args ) public virtual; function getNumMarkets() public view virtual returns (uint256); function getMarketTokenAddress(uint256 marketId) public view virtual returns (address); } library Account { // ============ Enums ============ /* * Most-recently-cached account status. * * Normal: Can only be liquidated if the account values are violating the global margin-ratio. * Liquid: Can be liquidated no matter the account values. * Can be vaporized if there are no more positive account values. * Vapor: Has only negative (or zeroed) account values. Can be vaporized. * */ enum Status { Normal, Liquid, Vapor } // ============ Structs ============ // Represents the unique key that specifies an account struct Info { address owner; // The address that owns the account uint256 number; // A nonce that allows a single address to control many accounts } // The complete storage for any account struct Storage { mapping (uint256 => Types.Par) balances; // Mapping from marketId to principal Status status; } // ============ Library Functions ============ function equals( Info memory a, Info memory b ) internal pure returns (bool) { return a.owner == b.owner && a.number == b.number; } } library Actions { // ============ Constants ============ bytes32 constant FILE = "Actions"; // ============ Enums ============ enum ActionType { Deposit, // supply tokens Withdraw, // borrow tokens Transfer, // transfer balance between accounts Buy, // buy an amount of some token (externally) Sell, // sell an amount of some token (externally) Trade, // trade tokens against another account Liquidate, // liquidate an undercollateralized or expiring account Vaporize, // use excess tokens to zero-out a completely negative account Call // send arbitrary data to an address } enum AccountLayout { OnePrimary, TwoPrimary, PrimaryAndSecondary } enum MarketLayout { ZeroMarkets, OneMarket, TwoMarkets } // ============ Structs ============ /* * Arguments that are passed to Solo in an ordered list as part of a single operation. * Each ActionArgs has an actionType which specifies which action struct that this data will be * parsed into before being processed. */ struct ActionArgs { ActionType actionType; uint256 accountId; Types.AssetAmount amount; uint256 primaryMarketId; uint256 secondaryMarketId; address otherAddress; uint256 otherAccountId; bytes data; } // ============ Action Types ============ /* * Moves tokens from an address to Solo. Can either repay a borrow or provide additional supply. */ struct DepositArgs { Types.AssetAmount amount; Account.Info account; uint256 market; address from; } /* * Moves tokens from Solo to another address. Can either borrow tokens or reduce the amount * previously supplied. */ struct WithdrawArgs { Types.AssetAmount amount; Account.Info account; uint256 market; address to; } /* * Transfers balance between two accounts. The msg.sender must be an operator for both accounts. * The amount field applies to accountOne. * This action does not require any token movement since the trade is done internally to Solo. */ struct TransferArgs { Types.AssetAmount amount; Account.Info accountOne; Account.Info accountTwo; uint256 market; } /* * Acquires a certain amount of tokens by spending other tokens. Sends takerMarket tokens to the * specified exchangeWrapper contract and expects makerMarket tokens in return. The amount field * applies to the makerMarket. */ struct BuyArgs { Types.AssetAmount amount; Account.Info account; uint256 makerMarket; uint256 takerMarket; address exchangeWrapper; bytes orderData; } /* * Spends a certain amount of tokens to acquire other tokens. Sends takerMarket tokens to the * specified exchangeWrapper and expects makerMarket tokens in return. The amount field applies * to the takerMarket. */ struct SellArgs { Types.AssetAmount amount; Account.Info account; uint256 takerMarket; uint256 makerMarket; address exchangeWrapper; bytes orderData; } /* * Trades balances between two accounts using any external contract that implements the * AutoTrader interface. The AutoTrader contract must be an operator for the makerAccount (for * which it is trading on-behalf-of). The amount field applies to the makerAccount and the * inputMarket. This proposed change to the makerAccount is passed to the AutoTrader which will * quote a change for the makerAccount in the outputMarket (or will disallow the trade). * This action does not require any token movement since the trade is done internally to Solo. */ struct TradeArgs { Types.AssetAmount amount; Account.Info takerAccount; Account.Info makerAccount; uint256 inputMarket; uint256 outputMarket; address autoTrader; bytes tradeData; } /* * Each account must maintain a certain margin-ratio (specified globally). If the account falls * below this margin-ratio, it can be liquidated by any other account. This allows anyone else * (arbitrageurs) to repay any borrowed asset (owedMarket) of the liquidating account in * exchange for any collateral asset (heldMarket) of the liquidAccount. The ratio is determined * by the price ratio (given by the oracles) plus a spread (specified globally). Liquidating an * account also sets a flag on the account that the account is being liquidated. This allows * anyone to continue liquidating the account until there are no more borrows being taken by the * liquidating account. Liquidators do not have to liquidate the entire account all at once but * can liquidate as much as they choose. The liquidating flag allows liquidators to continue * liquidating the account even if it becomes collateralized through partial liquidation or * price movement. */ struct LiquidateArgs { Types.AssetAmount amount; Account.Info solidAccount; Account.Info liquidAccount; uint256 owedMarket; uint256 heldMarket; } /* * Similar to liquidate, but vaporAccounts are accounts that have only negative balances * remaining. The arbitrageur pays back the negative asset (owedMarket) of the vaporAccount in * exchange for a collateral asset (heldMarket) at a favorable spread. However, since the * liquidAccount has no collateral assets, the collateral must come from Solo's excess tokens. */ struct VaporizeArgs { Types.AssetAmount amount; Account.Info solidAccount; Account.Info vaporAccount; uint256 owedMarket; uint256 heldMarket; } /* * Passes arbitrary bytes of data to an external contract that implements the Callee interface. * Does not change any asset amounts. This function may be useful for setting certain variables * on layer-two contracts for certain accounts without having to make a separate Ethereum * transaction for doing so. Also, the second-layer contracts can ensure that the call is coming * from an operator of the particular account. */ struct CallArgs { Account.Info account; address callee; bytes data; } // ============ Helper Functions ============ function getMarketLayout( ActionType actionType ) internal pure returns (MarketLayout) { if ( actionType == Actions.ActionType.Deposit || actionType == Actions.ActionType.Withdraw || actionType == Actions.ActionType.Transfer ) { return MarketLayout.OneMarket; } else if (actionType == Actions.ActionType.Call) { return MarketLayout.ZeroMarkets; } return MarketLayout.TwoMarkets; } function getAccountLayout( ActionType actionType ) internal pure returns (AccountLayout) { if ( actionType == Actions.ActionType.Transfer || actionType == Actions.ActionType.Trade ) { return AccountLayout.TwoPrimary; } else if ( actionType == Actions.ActionType.Liquidate || actionType == Actions.ActionType.Vaporize ) { return AccountLayout.PrimaryAndSecondary; } return AccountLayout.OnePrimary; } // ============ Parsing Functions ============ function parseDepositArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (DepositArgs memory) { assert(args.actionType == ActionType.Deposit); return DepositArgs({ amount: args.amount, account: accounts[args.accountId], market: args.primaryMarketId, from: args.otherAddress }); } function parseWithdrawArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (WithdrawArgs memory) { assert(args.actionType == ActionType.Withdraw); return WithdrawArgs({ amount: args.amount, account: accounts[args.accountId], market: args.primaryMarketId, to: args.otherAddress }); } function parseTransferArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (TransferArgs memory) { assert(args.actionType == ActionType.Transfer); return TransferArgs({ amount: args.amount, accountOne: accounts[args.accountId], accountTwo: accounts[args.otherAccountId], market: args.primaryMarketId }); } function parseBuyArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (BuyArgs memory) { assert(args.actionType == ActionType.Buy); return BuyArgs({ amount: args.amount, account: accounts[args.accountId], makerMarket: args.primaryMarketId, takerMarket: args.secondaryMarketId, exchangeWrapper: args.otherAddress, orderData: args.data }); } function parseSellArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (SellArgs memory) { assert(args.actionType == ActionType.Sell); return SellArgs({ amount: args.amount, account: accounts[args.accountId], takerMarket: args.primaryMarketId, makerMarket: args.secondaryMarketId, exchangeWrapper: args.otherAddress, orderData: args.data }); } function parseTradeArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (TradeArgs memory) { assert(args.actionType == ActionType.Trade); return TradeArgs({ amount: args.amount, takerAccount: accounts[args.accountId], makerAccount: accounts[args.otherAccountId], inputMarket: args.primaryMarketId, outputMarket: args.secondaryMarketId, autoTrader: args.otherAddress, tradeData: args.data }); } function parseLiquidateArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (LiquidateArgs memory) { assert(args.actionType == ActionType.Liquidate); return LiquidateArgs({ amount: args.amount, solidAccount: accounts[args.accountId], liquidAccount: accounts[args.otherAccountId], owedMarket: args.primaryMarketId, heldMarket: args.secondaryMarketId }); } function parseVaporizeArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (VaporizeArgs memory) { assert(args.actionType == ActionType.Vaporize); return VaporizeArgs({ amount: args.amount, solidAccount: accounts[args.accountId], vaporAccount: accounts[args.otherAccountId], owedMarket: args.primaryMarketId, heldMarket: args.secondaryMarketId }); } function parseCallArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (CallArgs memory) { assert(args.actionType == ActionType.Call); return CallArgs({ account: accounts[args.accountId], callee: args.otherAddress, data: args.data }); } } library Math { using SafeMath for uint256; // ============ Constants ============ bytes32 constant FILE = "Math"; // ============ Library Functions ============ /* * Return target * (numerator / denominator). */ function getPartial( uint256 target, uint256 numerator, uint256 denominator ) internal pure returns (uint256) { return target.mul(numerator).div(denominator); } /* * Return target * (numerator / denominator), but rounded up. */ function getPartialRoundUp( uint256 target, uint256 numerator, uint256 denominator ) internal pure returns (uint256) { if (target == 0 || numerator == 0) { // SafeMath will check for zero denominator return SafeMath.div(0, denominator); } return target.mul(numerator).sub(1).div(denominator).add(1); } function to128( uint256 number ) internal pure returns (uint128) { uint128 result = uint128(number); Require.that( result == number, FILE, "Unsafe cast to uint128" ); return result; } function to96( uint256 number ) internal pure returns (uint96) { uint96 result = uint96(number); Require.that( result == number, FILE, "Unsafe cast to uint96" ); return result; } function to32( uint256 number ) internal pure returns (uint32) { uint32 result = uint32(number); Require.that( result == number, FILE, "Unsafe cast to uint32" ); return result; } function min( uint256 a, uint256 b ) internal pure returns (uint256) { return a < b ? a : b; } function max( uint256 a, uint256 b ) internal pure returns (uint256) { return a > b ? a : b; } } library Require { // ============ Constants ============ uint256 constant ASCII_ZERO = 48; // '0' uint256 constant ASCII_RELATIVE_ZERO = 87; // 'a' - 10 uint256 constant ASCII_LOWER_EX = 120; // 'x' bytes2 constant COLON = 0x3a20; // ': ' bytes2 constant COMMA = 0x2c20; // ', ' bytes2 constant LPAREN = 0x203c; // ' <' byte constant RPAREN = 0x3e; // '>' uint256 constant FOUR_BIT_MASK = 0xf; // ============ Library Functions ============ function that( bool must, bytes32 file, bytes32 reason ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason) ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, uint256 payloadA ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), RPAREN ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, uint256 payloadA, uint256 payloadB ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), COMMA, stringify(payloadB), RPAREN ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, address payloadA ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), RPAREN ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, address payloadA, uint256 payloadB ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), COMMA, stringify(payloadB), RPAREN ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, address payloadA, uint256 payloadB, uint256 payloadC ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), COMMA, stringify(payloadB), COMMA, stringify(payloadC), RPAREN ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, bytes32 payloadA ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), RPAREN ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, bytes32 payloadA, uint256 payloadB, uint256 payloadC ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), COMMA, stringify(payloadB), COMMA, stringify(payloadC), RPAREN ) ) ); } } // ============ Private Functions ============ function stringifyTruncated( bytes32 input ) private pure returns (bytes memory) { // put the input bytes into the result bytes memory result = abi.encodePacked(input); // determine the length of the input by finding the location of the last non-zero byte for (uint256 i = 32; i > 0; ) { // reverse-for-loops with unsigned integer /* solium-disable-next-line security/no-modify-for-iter-var */ i--; // find the last non-zero byte in order to determine the length if (result[i] != 0) { uint256 length = i + 1; /* solium-disable-next-line security/no-inline-assembly */ assembly { mstore(result, length) // r.length = length; } return result; } } // all bytes are zero return new bytes(0); } function stringify( uint256 input ) private pure returns (bytes memory) { if (input == 0) { return "0"; } // get the final string length uint256 j = input; uint256 length; while (j != 0) { length++; j /= 10; } // allocate the string bytes memory bstr = new bytes(length); // populate the string starting with the least-significant character j = input; for (uint256 i = length; i > 0; ) { // reverse-for-loops with unsigned integer /* solium-disable-next-line security/no-modify-for-iter-var */ i--; // take last decimal digit bstr[i] = byte(uint8(ASCII_ZERO + (j % 10))); // remove the last decimal digit j /= 10; } return bstr; } function stringify( address input ) private pure returns (bytes memory) { uint256 z = uint256(input); // addresses are "0x" followed by 20 bytes of data which take up 2 characters each bytes memory result = new bytes(42); // populate the result with "0x" result[0] = byte(uint8(ASCII_ZERO)); result[1] = byte(uint8(ASCII_LOWER_EX)); // for each byte (starting from the lowest byte), populate the result with two characters for (uint256 i = 0; i < 20; i++) { // each byte takes two characters uint256 shift = i * 2; // populate the least-significant character result[41 - shift] = char(z & FOUR_BIT_MASK); z = z >> 4; // populate the most-significant character result[40 - shift] = char(z & FOUR_BIT_MASK); z = z >> 4; } return result; } function stringify( bytes32 input ) private pure returns (bytes memory) { uint256 z = uint256(input); // bytes32 are "0x" followed by 32 bytes of data which take up 2 characters each bytes memory result = new bytes(66); // populate the result with "0x" result[0] = byte(uint8(ASCII_ZERO)); result[1] = byte(uint8(ASCII_LOWER_EX)); // for each byte (starting from the lowest byte), populate the result with two characters for (uint256 i = 0; i < 32; i++) { // each byte takes two characters uint256 shift = i * 2; // populate the least-significant character result[65 - shift] = char(z & FOUR_BIT_MASK); z = z >> 4; // populate the most-significant character result[64 - shift] = char(z & FOUR_BIT_MASK); z = z >> 4; } return result; } function char( uint256 input ) private pure returns (byte) { // return ASCII digit (0-9) if (input < 10) { return byte(uint8(input + ASCII_ZERO)); } // return ASCII letter (a-f) return byte(uint8(input + ASCII_RELATIVE_ZERO)); } } library Types { using Math for uint256; // ============ AssetAmount ============ enum AssetDenomination { Wei, // the amount is denominated in wei Par // the amount is denominated in par } enum AssetReference { Delta, // the amount is given as a delta from the current value Target // the amount is given as an exact number to end up at } struct AssetAmount { bool sign; // true if positive AssetDenomination denomination; AssetReference ref; uint256 value; } // ============ Par (Principal Amount) ============ // Total borrow and supply values for a market struct TotalPar { uint128 borrow; uint128 supply; } // Individual principal amount for an account struct Par { bool sign; // true if positive uint128 value; } function zeroPar() internal pure returns (Par memory) { return Par({ sign: false, value: 0 }); } function sub( Par memory a, Par memory b ) internal pure returns (Par memory) { return add(a, negative(b)); } function add( Par memory a, Par memory b ) internal pure returns (Par memory) { Par memory result; if (a.sign == b.sign) { result.sign = a.sign; result.value = SafeMath.add(a.value, b.value).to128(); } else { if (a.value >= b.value) { result.sign = a.sign; result.value = SafeMath.sub(a.value, b.value).to128(); } else { result.sign = b.sign; result.value = SafeMath.sub(b.value, a.value).to128(); } } return result; } function equals( Par memory a, Par memory b ) internal pure returns (bool) { if (a.value == b.value) { if (a.value == 0) { return true; } return a.sign == b.sign; } return false; } function negative( Par memory a ) internal pure returns (Par memory) { return Par({ sign: !a.sign, value: a.value }); } function isNegative( Par memory a ) internal pure returns (bool) { return !a.sign && a.value > 0; } function isPositive( Par memory a ) internal pure returns (bool) { return a.sign && a.value > 0; } function isZero( Par memory a ) internal pure returns (bool) { return a.value == 0; } // ============ Wei (Token Amount) ============ // Individual token amount for an account struct Wei { bool sign; // true if positive uint256 value; } function zeroWei() internal pure returns (Wei memory) { return Wei({ sign: false, value: 0 }); } function sub( Wei memory a, Wei memory b ) internal pure returns (Wei memory) { return add(a, negative(b)); } function add( Wei memory a, Wei memory b ) internal pure returns (Wei memory) { Wei memory result; if (a.sign == b.sign) { result.sign = a.sign; result.value = SafeMath.add(a.value, b.value); } else { if (a.value >= b.value) { result.sign = a.sign; result.value = SafeMath.sub(a.value, b.value); } else { result.sign = b.sign; result.value = SafeMath.sub(b.value, a.value); } } return result; } function equals( Wei memory a, Wei memory b ) internal pure returns (bool) { if (a.value == b.value) { if (a.value == 0) { return true; } return a.sign == b.sign; } return false; } function negative( Wei memory a ) internal pure returns (Wei memory) { return Wei({ sign: !a.sign, value: a.value }); } function isNegative( Wei memory a ) internal pure returns (bool) { return !a.sign && a.value > 0; } function isPositive( Wei memory a ) internal pure returns (bool) { return a.sign && a.value > 0; } function isZero( Wei memory a ) internal pure returns (bool) { return a.value == 0; } } contract FulcrumSavingsProtocol is ProtocolInterface, DSAuth { address public constant NEW_IDAI_ADDRESS = 0x493C57C4763932315A328269E1ADaD09653B9081; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; address public savingsProxy; uint public decimals = 10 ** 18; function addSavingsProxy(address _savingsProxy) public auth { savingsProxy = _savingsProxy; } function deposit(address _user, uint _amount) public override { require(msg.sender == _user); // get dai from user require(ERC20(DAI_ADDRESS).transferFrom(_user, address(this), _amount)); // approve dai to Fulcrum ERC20(DAI_ADDRESS).approve(NEW_IDAI_ADDRESS, uint(-1)); // mint iDai ITokenInterface(NEW_IDAI_ADDRESS).mint(_user, _amount); } function withdraw(address _user, uint _amount) public override { require(msg.sender == _user); // transfer all users tokens to our contract require(ERC20(NEW_IDAI_ADDRESS).transferFrom(_user, address(this), ITokenInterface(NEW_IDAI_ADDRESS).balanceOf(_user))); // approve iDai to that contract ERC20(NEW_IDAI_ADDRESS).approve(NEW_IDAI_ADDRESS, uint(-1)); uint tokenPrice = ITokenInterface(NEW_IDAI_ADDRESS).tokenPrice(); // get dai from iDai contract ITokenInterface(NEW_IDAI_ADDRESS).burn(_user, _amount * decimals / tokenPrice); // return all remaining tokens back to user require(ERC20(NEW_IDAI_ADDRESS).transfer(_user, ITokenInterface(NEW_IDAI_ADDRESS).balanceOf(address(this)))); } } contract ShifterRegistry is AdminAuth { mapping (string => address) public contractAddresses; bool public finalized; function changeContractAddr(string memory _contractName, address _protoAddr) public onlyOwner { require(!finalized); contractAddresses[_contractName] = _protoAddr; } function lock() public onlyOwner { finalized = true; } function getAddr(string memory _contractName) public view returns (address contractAddr) { contractAddr = contractAddresses[_contractName]; require(contractAddr != address(0), "No contract address registred"); } } library Address { function isContract(address account) internal view returns (bool) { // According to EIP-1052, 0x0 is the value returned for not-yet created accounts // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned // for accounts without code, i.e. `keccak256('')` bytes32 codehash; bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470; // solhint-disable-next-line no-inline-assembly assembly { codehash := extcodehash(account) } return (codehash != accountHash && codehash != 0x0); } function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return _functionCallWithValue(target, data, 0, errorMessage); } function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); return _functionCallWithValue(target, data, value, errorMessage); } function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) { require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: weiValue }(data); if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } contract BotRegistry is AdminAuth { mapping (address => bool) public botList; constructor() public { botList[0x776B4a13093e30B05781F97F6A4565B6aa8BE330] = true; botList[0xAED662abcC4FA3314985E67Ea993CAD064a7F5cF] = true; botList[0xa5d330F6619d6bF892A5B87D80272e1607b3e34D] = true; botList[0x5feB4DeE5150B589a7f567EA7CADa2759794A90A] = true; botList[0x7ca06417c1d6f480d3bB195B80692F95A6B66158] = true; } function setBot(address _botAddr, bool _state) public onlyOwner { botList[_botAddr] = _state; } } contract DFSProxy is Auth { string public constant NAME = "DFSProxy"; string public constant VERSION = "v0.1"; mapping(address => mapping(uint => bool)) public nonces; // --- EIP712 niceties --- bytes32 public DOMAIN_SEPARATOR; bytes32 public constant PERMIT_TYPEHASH = keccak256("callProxy(address _user,address _proxy,address _contract,bytes _txData,uint256 _nonce)"); constructor(uint256 chainId_) public { DOMAIN_SEPARATOR = keccak256(abi.encode( keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"), keccak256(bytes(NAME)), keccak256(bytes(VERSION)), chainId_, address(this) )); } function callProxy(address _user, address _proxy, address _contract, bytes calldata _txData, uint256 _nonce, uint8 _v, bytes32 _r, bytes32 _s) external payable onlyAuthorized { bytes32 digest = keccak256(abi.encodePacked( "\x19\x01", DOMAIN_SEPARATOR, keccak256(abi.encode(PERMIT_TYPEHASH, _user, _proxy, _contract, _txData, _nonce)) )); // user must be proxy owner require(DSProxyInterface(_proxy).owner() == _user); require(_user == ecrecover(digest, _v, _r, _s), "DFSProxy/user-not-valid"); require(!nonces[_user][_nonce], "DFSProxy/invalid-nonce"); nonces[_user][_nonce] = true; DSProxyInterface(_proxy).execute{value: msg.value}(_contract, _txData); } } contract Discount { address public owner; mapping(address => CustomServiceFee) public serviceFees; uint256 constant MAX_SERVICE_FEE = 400; struct CustomServiceFee { bool active; uint256 amount; } constructor() public { owner = msg.sender; } function isCustomFeeSet(address _user) public view returns (bool) { return serviceFees[_user].active; } function getCustomServiceFee(address _user) public view returns (uint256) { return serviceFees[_user].amount; } function setServiceFee(address _user, uint256 _fee) public { require(msg.sender == owner, "Only owner"); require(_fee >= MAX_SERVICE_FEE || _fee == 0); serviceFees[_user] = CustomServiceFee({active: true, amount: _fee}); } function disableServiceFee(address _user) public { require(msg.sender == owner, "Only owner"); serviceFees[_user] = CustomServiceFee({active: false, amount: 0}); } } contract DydxFlashLoanBase { using SafeMath for uint256; address public constant SOLO_MARGIN_ADDRESS = 0x1E0447b19BB6EcFdAe1e4AE1694b0C3659614e4e; function _getMarketIdFromTokenAddress(address token) internal view returns (uint256) { return 0; } function _getRepaymentAmountInternal(uint256 amount) internal view returns (uint256) { // Needs to be overcollateralize // Needs to provide +2 wei to be safe return amount.add(2); } function _getAccountInfo() internal view returns (Account.Info memory) { return Account.Info({owner: address(this), number: 1}); } function _getWithdrawAction(uint marketId, uint256 amount, address contractAddr) internal view returns (Actions.ActionArgs memory) { return Actions.ActionArgs({ actionType: Actions.ActionType.Withdraw, accountId: 0, amount: Types.AssetAmount({ sign: false, denomination: Types.AssetDenomination.Wei, ref: Types.AssetReference.Delta, value: amount }), primaryMarketId: marketId, secondaryMarketId: 0, otherAddress: contractAddr, otherAccountId: 0, data: "" }); } function _getCallAction(bytes memory data, address contractAddr) internal view returns (Actions.ActionArgs memory) { return Actions.ActionArgs({ actionType: Actions.ActionType.Call, accountId: 0, amount: Types.AssetAmount({ sign: false, denomination: Types.AssetDenomination.Wei, ref: Types.AssetReference.Delta, value: 0 }), primaryMarketId: 0, secondaryMarketId: 0, otherAddress: contractAddr, otherAccountId: 0, data: data }); } function _getDepositAction(uint marketId, uint256 amount, address contractAddr) internal view returns (Actions.ActionArgs memory) { return Actions.ActionArgs({ actionType: Actions.ActionType.Deposit, accountId: 0, amount: Types.AssetAmount({ sign: true, denomination: Types.AssetDenomination.Wei, ref: Types.AssetReference.Delta, value: amount }), primaryMarketId: marketId, secondaryMarketId: 0, otherAddress: contractAddr, otherAccountId: 0, data: "" }); } } contract ExchangeDataParser { function decodeExchangeData( SaverExchangeCore.ExchangeData memory exchangeData ) internal pure returns (address[4] memory, uint[4] memory, bytes memory) { return ( [exchangeData.srcAddr, exchangeData.destAddr, exchangeData.exchangeAddr, exchangeData.wrapper], [exchangeData.srcAmount, exchangeData.destAmount, exchangeData.minPrice, exchangeData.price0x], exchangeData.callData ); } function encodeExchangeData( address[4] memory exAddr, uint[4] memory exNum, bytes memory callData ) internal pure returns (SaverExchangeCore.ExchangeData memory) { return SaverExchangeCore.ExchangeData({ srcAddr: exAddr[0], destAddr: exAddr[1], srcAmount: exNum[0], destAmount: exNum[1], minPrice: exNum[2], wrapper: exAddr[3], exchangeAddr: exAddr[2], callData: callData, price0x: exNum[3] }); } } interface IFlashLoanReceiver { function executeOperation(address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external; } abstract contract ILendingPoolAddressesProvider { function getLendingPool() public view virtual returns (address); function setLendingPoolImpl(address _pool) public virtual; function getLendingPoolCore() public virtual view returns (address payable); function setLendingPoolCoreImpl(address _lendingPoolCore) public virtual; function getLendingPoolConfigurator() public virtual view returns (address); function setLendingPoolConfiguratorImpl(address _configurator) public virtual; function getLendingPoolDataProvider() public virtual view returns (address); function setLendingPoolDataProviderImpl(address _provider) public virtual; function getLendingPoolParametersProvider() public virtual view returns (address); function setLendingPoolParametersProviderImpl(address _parametersProvider) public virtual; function getTokenDistributor() public virtual view returns (address); function setTokenDistributor(address _tokenDistributor) public virtual; function getFeeProvider() public virtual view returns (address); function setFeeProviderImpl(address _feeProvider) public virtual; function getLendingPoolLiquidationManager() public virtual view returns (address); function setLendingPoolLiquidationManager(address _manager) public virtual; function getLendingPoolManager() public virtual view returns (address); function setLendingPoolManager(address _lendingPoolManager) public virtual; function getPriceOracle() public virtual view returns (address); function setPriceOracle(address _priceOracle) public virtual; function getLendingRateOracle() public view virtual returns (address); function setLendingRateOracle(address _lendingRateOracle) public virtual; } library EthAddressLib { function ethAddress() internal pure returns(address) { return 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; } } abstract contract FlashLoanReceiverBase is IFlashLoanReceiver { using SafeERC20 for ERC20; using SafeMath for uint256; ILendingPoolAddressesProvider public addressesProvider; constructor(ILendingPoolAddressesProvider _provider) public { addressesProvider = _provider; } receive () external virtual payable {} function transferFundsBackToPoolInternal(address _reserve, uint256 _amount) internal { address payable core = addressesProvider.getLendingPoolCore(); transferInternal(core,_reserve, _amount); } function transferInternal(address payable _destination, address _reserve, uint256 _amount) internal { if(_reserve == EthAddressLib.ethAddress()) { //solium-disable-next-line _destination.call{value: _amount}(""); return; } ERC20(_reserve).safeTransfer(_destination, _amount); } function getBalanceInternal(address _target, address _reserve) internal view returns(uint256) { if(_reserve == EthAddressLib.ethAddress()) { return _target.balance; } return ERC20(_reserve).balanceOf(_target); } } contract GasBurner { // solhint-disable-next-line const-name-snakecase GasTokenInterface public constant gasToken = GasTokenInterface(0x0000000000b3F879cb30FE243b4Dfee438691c04); modifier burnGas(uint _amount) { if (gasToken.balanceOf(address(this)) >= _amount) { gasToken.free(_amount); } _; } } library SafeERC20 { using SafeMath for uint256; using Address for address; function safeTransfer(ERC20 token, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } function safeTransferFrom(ERC20 token, address from, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value)); } /** * @dev Deprecated. This function has issues similar to the ones found in * {IERC20-approve}, and its usage is discouraged. */ function safeApprove(ERC20 token, address spender, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, 0)); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value)); } function safeIncreaseAllowance(ERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).add(value); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } function safeDecreaseAllowance(ERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero"); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } function _callOptionalReturn(ERC20 token, bytes memory data) private { bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed"); if (returndata.length > 0) { // Return data is optional // solhint-disable-next-line max-line-length require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } } } library SafeMath { function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } contract ZrxAllowlist is AdminAuth { mapping (address => bool) public zrxAllowlist; mapping(address => bool) private nonPayableAddrs; constructor() public { zrxAllowlist[0x6958F5e95332D93D21af0D7B9Ca85B8212fEE0A5] = true; zrxAllowlist[0x61935CbDd02287B511119DDb11Aeb42F1593b7Ef] = true; zrxAllowlist[0xDef1C0ded9bec7F1a1670819833240f027b25EfF] = true; zrxAllowlist[0x080bf510FCbF18b91105470639e9561022937712] = true; nonPayableAddrs[0x080bf510FCbF18b91105470639e9561022937712] = true; } function setAllowlistAddr(address _zrxAddr, bool _state) public onlyOwner { zrxAllowlist[_zrxAddr] = _state; } function isZrxAddr(address _zrxAddr) public view returns (bool) { return zrxAllowlist[_zrxAddr]; } function addNonPayableAddr(address _nonPayableAddr) public onlyOwner { nonPayableAddrs[_nonPayableAddr] = true; } function removeNonPayableAddr(address _nonPayableAddr) public onlyOwner { nonPayableAddrs[_nonPayableAddr] = false; } function isNonPayableAddr(address _addr) public view returns(bool) { return nonPayableAddrs[_addr]; } } contract AaveBasicProxy is GasBurner { using SafeERC20 for ERC20; address public constant ETH_ADDR = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant AAVE_LENDING_POOL_ADDRESSES = 0x24a42fD28C976A61Df5D00D0599C34c4f90748c8; uint16 public constant AAVE_REFERRAL_CODE = 64; /// @notice User deposits tokens to the Aave protocol /// @dev User needs to approve the DSProxy to pull the _tokenAddr tokens /// @param _tokenAddr The address of the token to be deposited /// @param _amount Amount of tokens to be deposited function deposit(address _tokenAddr, uint256 _amount) public burnGas(5) payable { address lendingPoolCore = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); uint ethValue = _amount; if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(this), _amount); approveToken(_tokenAddr, lendingPoolCore); ethValue = 0; } ILendingPool(lendingPool).deposit{value: ethValue}(_tokenAddr, _amount, AAVE_REFERRAL_CODE); setUserUseReserveAsCollateralIfNeeded(_tokenAddr); } /// @notice User withdraws tokens from the Aave protocol /// @param _tokenAddr The address of the token to be withdrawn /// @param _aTokenAddr ATokens to be withdrawn /// @param _amount Amount of tokens to be withdrawn /// @param _wholeAmount If true we will take the whole amount on chain function withdraw(address _tokenAddr, address _aTokenAddr, uint256 _amount, bool _wholeAmount) public burnGas(8) { uint256 amount = _wholeAmount ? ERC20(_aTokenAddr).balanceOf(address(this)) : _amount; IAToken(_aTokenAddr).redeem(amount); withdrawTokens(_tokenAddr); } /// @notice User borrows tokens to the Aave protocol /// @param _tokenAddr The address of the token to be borrowed /// @param _amount Amount of tokens to be borrowed /// @param _type Send 1 for variable rate and 2 for fixed rate function borrow(address _tokenAddr, uint256 _amount, uint256 _type) public burnGas(8) { address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); ILendingPool(lendingPool).borrow(_tokenAddr, _amount, _type, AAVE_REFERRAL_CODE); withdrawTokens(_tokenAddr); } /// @dev User needs to approve the DSProxy to pull the _tokenAddr tokens /// @notice User paybacks tokens to the Aave protocol /// @param _tokenAddr The address of the token to be paybacked /// @param _aTokenAddr ATokens to be paybacked /// @param _amount Amount of tokens to be payed back /// @param _wholeDebt If true the _amount will be set to the whole amount of the debt function payback(address _tokenAddr, address _aTokenAddr, uint256 _amount, bool _wholeDebt) public burnGas(3) payable { address lendingPoolCore = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); uint256 amount = _amount; (,uint256 borrowAmount,,,,,uint256 originationFee,,,) = ILendingPool(lendingPool).getUserReserveData(_tokenAddr, address(this)); if (_wholeDebt) { amount = borrowAmount + originationFee; } if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(this), amount); approveToken(_tokenAddr, lendingPoolCore); } ILendingPool(lendingPool).repay{value: msg.value}(_tokenAddr, amount, payable(address(this))); withdrawTokens(_tokenAddr); } /// @dev User needs to approve the DSProxy to pull the _tokenAddr tokens /// @notice User paybacks tokens to the Aave protocol /// @param _tokenAddr The address of the token to be paybacked /// @param _aTokenAddr ATokens to be paybacked /// @param _amount Amount of tokens to be payed back /// @param _wholeDebt If true the _amount will be set to the whole amount of the debt function paybackOnBehalf(address _tokenAddr, address _aTokenAddr, uint256 _amount, bool _wholeDebt, address payable _onBehalf) public burnGas(3) payable { address lendingPoolCore = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); uint256 amount = _amount; (,uint256 borrowAmount,,,,,uint256 originationFee,,,) = ILendingPool(lendingPool).getUserReserveData(_tokenAddr, _onBehalf); if (_wholeDebt) { amount = borrowAmount + originationFee; } if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(this), amount); if (originationFee > 0) { ERC20(_tokenAddr).safeTransfer(_onBehalf, originationFee); } approveToken(_tokenAddr, lendingPoolCore); } ILendingPool(lendingPool).repay{value: msg.value}(_tokenAddr, amount, _onBehalf); withdrawTokens(_tokenAddr); } /// @notice Helper method to withdraw tokens from the DSProxy /// @param _tokenAddr Address of the token to be withdrawn function withdrawTokens(address _tokenAddr) public { uint256 amount = _tokenAddr == ETH_ADDR ? address(this).balance : ERC20(_tokenAddr).balanceOf(address(this)); if (amount > 0) { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransfer(msg.sender, amount); } else { msg.sender.transfer(amount); } } } /// @notice Approves token contract to pull underlying tokens from the DSProxy /// @param _tokenAddr Token we are trying to approve /// @param _caller Address which will gain the approval function approveToken(address _tokenAddr, address _caller) internal { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeApprove(_caller, uint256(-1)); } } function setUserUseReserveAsCollateralIfNeeded(address _tokenAddr) public { address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); (,,,,,,,,,bool collateralEnabled) = ILendingPool(lendingPool).getUserReserveData(_tokenAddr, address(this)); if (!collateralEnabled) { ILendingPool(lendingPool).setUserUseReserveAsCollateral(_tokenAddr, true); } } function setUserUseReserveAsCollateral(address _tokenAddr, bool _true) public { address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); ILendingPool(lendingPool).setUserUseReserveAsCollateral(_tokenAddr, _true); } function swapBorrowRateMode(address _reserve) public { address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); ILendingPool(lendingPool).swapBorrowRateMode(_reserve); } } contract AaveLoanInfo is AaveSafetyRatio { struct LoanData { address user; uint128 ratio; address[] collAddr; address[] borrowAddr; uint256[] collAmounts; uint256[] borrowAmounts; } struct TokenInfo { address aTokenAddress; address underlyingTokenAddress; uint256 collateralFactor; uint256 price; } struct TokenInfoFull { address aTokenAddress; address underlyingTokenAddress; uint256 supplyRate; uint256 borrowRate; uint256 borrowRateStable; uint256 totalSupply; uint256 availableLiquidity; uint256 totalBorrow; uint256 collateralFactor; uint256 liquidationRatio; uint256 price; bool usageAsCollateralEnabled; } struct UserToken { address token; uint256 balance; uint256 borrows; uint256 borrowRateMode; bool enabledAsCollateral; } /// @notice Calcualted the ratio of coll/debt for a compound user /// @param _user Address of the user function getRatio(address _user) public view returns (uint256) { // For each asset the account is in return getSafetyRatio(_user); } /// @notice Fetches Aave prices for tokens /// @param _tokens Arr. of tokens for which to get the prices /// @return prices Array of prices function getPrices(address[] memory _tokens) public view returns (uint256[] memory prices) { address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); prices = new uint[](_tokens.length); for (uint256 i = 0; i < _tokens.length; ++i) { prices[i] = IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_tokens[i]); } } /// @notice Fetches Aave collateral factors for tokens /// @param _tokens Arr. of tokens for which to get the coll. factors /// @return collFactors Array of coll. factors function getCollFactors(address[] memory _tokens) public view returns (uint256[] memory collFactors) { address lendingPoolCoreAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); collFactors = new uint256[](_tokens.length); for (uint256 i = 0; i < _tokens.length; ++i) { (,collFactors[i],,) = ILendingPool(lendingPoolCoreAddress).getReserveConfiguration(_tokens[i]); } } function getTokenBalances(address _user, address[] memory _tokens) public view returns (UserToken[] memory userTokens) { address lendingPoolAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); userTokens = new UserToken[](_tokens.length); for (uint256 i = 0; i < _tokens.length; i++) { address asset = _tokens[i]; userTokens[i].token = asset; (userTokens[i].balance, userTokens[i].borrows,,userTokens[i].borrowRateMode,,,,,,userTokens[i].enabledAsCollateral) = ILendingPool(lendingPoolAddress).getUserReserveData(asset, _user); } } /// @notice Calcualted the ratio of coll/debt for an aave user /// @param _users Addresses of the user /// @return ratios Array of ratios function getRatios(address[] memory _users) public view returns (uint256[] memory ratios) { ratios = new uint256[](_users.length); for (uint256 i = 0; i < _users.length; ++i) { ratios[i] = getSafetyRatio(_users[i]); } } /// @notice Information about reserves /// @param _tokenAddresses Array of tokens addresses /// @return tokens Array of reserves infomartion function getTokensInfo(address[] memory _tokenAddresses) public view returns(TokenInfo[] memory tokens) { address lendingPoolCoreAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); tokens = new TokenInfo[](_tokenAddresses.length); for (uint256 i = 0; i < _tokenAddresses.length; ++i) { (,uint256 ltv,,) = ILendingPool(lendingPoolCoreAddress).getReserveConfiguration(_tokenAddresses[i]); tokens[i] = TokenInfo({ aTokenAddress: ILendingPool(lendingPoolCoreAddress).getReserveATokenAddress(_tokenAddresses[i]), underlyingTokenAddress: _tokenAddresses[i], collateralFactor: ltv, price: IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_tokenAddresses[i]) }); } } /// @notice Information about reserves /// @param _tokenAddresses Array of token addresses /// @return tokens Array of reserves infomartion function getFullTokensInfo(address[] memory _tokenAddresses) public view returns(TokenInfoFull[] memory tokens) { address lendingPoolCoreAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPoolAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); tokens = new TokenInfoFull[](_tokenAddresses.length); for (uint256 i = 0; i < _tokenAddresses.length; ++i) { (uint256 ltv, uint256 liqRatio,,, bool usageAsCollateralEnabled, bool borrowingEnabled, bool stableBorrowingEnabled,) = ILendingPool(lendingPoolAddress).getReserveConfigurationData(_tokenAddresses[i]); tokens[i] = TokenInfoFull({ aTokenAddress: ILendingPool(lendingPoolCoreAddress).getReserveATokenAddress(_tokenAddresses[i]), underlyingTokenAddress: _tokenAddresses[i], supplyRate: ILendingPool(lendingPoolCoreAddress).getReserveCurrentLiquidityRate(_tokenAddresses[i]), borrowRate: borrowingEnabled ? ILendingPool(lendingPoolCoreAddress).getReserveCurrentVariableBorrowRate(_tokenAddresses[i]) : 0, borrowRateStable: stableBorrowingEnabled ? ILendingPool(lendingPoolCoreAddress).getReserveCurrentStableBorrowRate(_tokenAddresses[i]) : 0, totalSupply: ILendingPool(lendingPoolCoreAddress).getReserveTotalLiquidity(_tokenAddresses[i]), availableLiquidity: ILendingPool(lendingPoolCoreAddress).getReserveAvailableLiquidity(_tokenAddresses[i]), totalBorrow: ILendingPool(lendingPoolCoreAddress).getReserveTotalBorrowsVariable(_tokenAddresses[i]), collateralFactor: ltv, liquidationRatio: liqRatio, price: IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_tokenAddresses[i]), usageAsCollateralEnabled: usageAsCollateralEnabled }); } } /// @notice Fetches all the collateral/debt address and amounts, denominated in ether /// @param _user Address of the user /// @return data LoanData information function getLoanData(address _user) public view returns (LoanData memory data) { address lendingPoolAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); address[] memory reserves = ILendingPool(lendingPoolAddress).getReserves(); data = LoanData({ user: _user, ratio: 0, collAddr: new address[](reserves.length), borrowAddr: new address[](reserves.length), collAmounts: new uint[](reserves.length), borrowAmounts: new uint[](reserves.length) }); uint64 collPos = 0; uint64 borrowPos = 0; for (uint64 i = 0; i < reserves.length; i++) { address reserve = reserves[i]; (uint256 aTokenBalance, uint256 borrowBalance,,,,,,,,) = ILendingPool(lendingPoolAddress).getUserReserveData(reserve, _user); uint256 price = IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(reserves[i]); if (aTokenBalance > 0) { uint256 userTokenBalanceEth = wmul(aTokenBalance, price) * (10 ** (18 - _getDecimals(reserve))); data.collAddr[collPos] = reserve; data.collAmounts[collPos] = userTokenBalanceEth; collPos++; } // Sum up debt in Eth if (borrowBalance > 0) { uint256 userBorrowBalanceEth = wmul(borrowBalance, price) * (10 ** (18 - _getDecimals(reserve))); data.borrowAddr[borrowPos] = reserve; data.borrowAmounts[borrowPos] = userBorrowBalanceEth; borrowPos++; } } data.ratio = uint128(getSafetyRatio(_user)); return data; } /// @notice Fetches all the collateral/debt address and amounts, denominated in ether /// @param _users Addresses of the user /// @return loans Array of LoanData information function getLoanDataArr(address[] memory _users) public view returns (LoanData[] memory loans) { loans = new LoanData[](_users.length); for (uint i = 0; i < _users.length; ++i) { loans[i] = getLoanData(_users[i]); } } } contract AaveMonitor is AdminAuth, DSMath, AaveSafetyRatio, GasBurner { using SafeERC20 for ERC20; enum Method { Boost, Repay } uint public REPAY_GAS_TOKEN = 19; uint public BOOST_GAS_TOKEN = 19; uint public MAX_GAS_PRICE = 200000000000; // 200 gwei uint public REPAY_GAS_COST = 2500000; uint public BOOST_GAS_COST = 2500000; address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; AaveMonitorProxy public aaveMonitorProxy; AaveSubscriptions public subscriptionsContract; address public aaveSaverProxy; DefisaverLogger public logger = DefisaverLogger(DEFISAVER_LOGGER); modifier onlyApproved() { require(BotRegistry(BOT_REGISTRY_ADDRESS).botList(msg.sender), "Not auth bot"); _; } /// @param _aaveMonitorProxy Proxy contracts that actually is authorized to call DSProxy /// @param _subscriptions Subscriptions contract for Aave positions /// @param _aaveSaverProxy Contract that actually performs Repay/Boost constructor(address _aaveMonitorProxy, address _subscriptions, address _aaveSaverProxy) public { aaveMonitorProxy = AaveMonitorProxy(_aaveMonitorProxy); subscriptionsContract = AaveSubscriptions(_subscriptions); aaveSaverProxy = _aaveSaverProxy; } /// @notice Bots call this method to repay for user when conditions are met /// @dev If the contract ownes gas token it will try and use it for gas price reduction /// @param _exData Exchange data /// @param _user The actual address that owns the Aave position function repayFor( SaverExchangeCore.ExchangeData memory _exData, address _user ) public payable onlyApproved burnGas(REPAY_GAS_TOKEN) { (bool isAllowed, uint ratioBefore) = canCall(Method.Repay, _user); require(isAllowed); // check if conditions are met uint256 gasCost = calcGasCost(REPAY_GAS_COST); aaveMonitorProxy.callExecute{value: msg.value}( _user, aaveSaverProxy, abi.encodeWithSignature( "repay((address,address,uint256,uint256,uint256,address,address,bytes,uint256),uint256)", _exData, gasCost ) ); (bool isGoodRatio, uint ratioAfter) = ratioGoodAfter(Method.Repay, _user); require(isGoodRatio); // check if the after result of the actions is good returnEth(); logger.Log(address(this), _user, "AutomaticAaveRepay", abi.encode(ratioBefore, ratioAfter)); } /// @notice Bots call this method to boost for user when conditions are met /// @dev If the contract ownes gas token it will try and use it for gas price reduction /// @param _exData Exchange data /// @param _user The actual address that owns the Aave position function boostFor( SaverExchangeCore.ExchangeData memory _exData, address _user ) public payable onlyApproved burnGas(BOOST_GAS_TOKEN) { (bool isAllowed, uint ratioBefore) = canCall(Method.Boost, _user); require(isAllowed); // check if conditions are met uint256 gasCost = calcGasCost(BOOST_GAS_COST); aaveMonitorProxy.callExecute{value: msg.value}( _user, aaveSaverProxy, abi.encodeWithSignature( "boost((address,address,uint256,uint256,uint256,address,address,bytes,uint256),uint256)", _exData, gasCost ) ); (bool isGoodRatio, uint ratioAfter) = ratioGoodAfter(Method.Boost, _user); require(isGoodRatio); // check if the after result of the actions is good returnEth(); logger.Log(address(this), _user, "AutomaticAaveBoost", abi.encode(ratioBefore, ratioAfter)); } /******************* INTERNAL METHODS ********************************/ function returnEth() internal { // return if some eth left if (address(this).balance > 0) { msg.sender.transfer(address(this).balance); } } /******************* STATIC METHODS ********************************/ /// @notice Checks if Boost/Repay could be triggered for the CDP /// @dev Called by AaveMonitor to enforce the min/max check /// @param _method Type of action to be called /// @param _user The actual address that owns the Aave position /// @return Boolean if it can be called and the ratio function canCall(Method _method, address _user) public view returns(bool, uint) { bool subscribed = subscriptionsContract.isSubscribed(_user); AaveSubscriptions.AaveHolder memory holder = subscriptionsContract.getHolder(_user); // check if cdp is subscribed if (!subscribed) return (false, 0); // check if boost and boost allowed if (_method == Method.Boost && !holder.boostEnabled) return (false, 0); uint currRatio = getSafetyRatio(_user); if (_method == Method.Repay) { return (currRatio < holder.minRatio, currRatio); } else if (_method == Method.Boost) { return (currRatio > holder.maxRatio, currRatio); } } /// @dev After the Boost/Repay check if the ratio doesn't trigger another call /// @param _method Type of action to be called /// @param _user The actual address that owns the Aave position /// @return Boolean if the recent action preformed correctly and the ratio function ratioGoodAfter(Method _method, address _user) public view returns(bool, uint) { AaveSubscriptions.AaveHolder memory holder; holder= subscriptionsContract.getHolder(_user); uint currRatio = getSafetyRatio(_user); if (_method == Method.Repay) { return (currRatio < holder.maxRatio, currRatio); } else if (_method == Method.Boost) { return (currRatio > holder.minRatio, currRatio); } } /// @notice Calculates gas cost (in Eth) of tx /// @dev Gas price is limited to MAX_GAS_PRICE to prevent attack of draining user CDP /// @param _gasAmount Amount of gas used for the tx function calcGasCost(uint _gasAmount) public view returns (uint) { uint gasPrice = tx.gasprice <= MAX_GAS_PRICE ? tx.gasprice : MAX_GAS_PRICE; return mul(gasPrice, _gasAmount); } /******************* OWNER ONLY OPERATIONS ********************************/ /// @notice Allows owner to change gas cost for boost operation, but only up to 3 millions /// @param _gasCost New gas cost for boost method function changeBoostGasCost(uint _gasCost) public onlyOwner { require(_gasCost < 3000000); BOOST_GAS_COST = _gasCost; } /// @notice Allows owner to change gas cost for repay operation, but only up to 3 millions /// @param _gasCost New gas cost for repay method function changeRepayGasCost(uint _gasCost) public onlyOwner { require(_gasCost < 3000000); REPAY_GAS_COST = _gasCost; } /// @notice Allows owner to change max gas price /// @param _maxGasPrice New max gas price function changeMaxGasPrice(uint _maxGasPrice) public onlyOwner { require(_maxGasPrice < 500000000000); MAX_GAS_PRICE = _maxGasPrice; } /// @notice Allows owner to change gas token amount /// @param _gasTokenAmount New gas token amount /// @param _repay true if repay gas token, false if boost gas token function changeGasTokenAmount(uint _gasTokenAmount, bool _repay) public onlyOwner { if (_repay) { REPAY_GAS_TOKEN = _gasTokenAmount; } else { BOOST_GAS_TOKEN = _gasTokenAmount; } } } contract AaveMonitorProxy is AdminAuth { using SafeERC20 for ERC20; uint public CHANGE_PERIOD; address public monitor; address public newMonitor; address public lastMonitor; uint public changeRequestedTimestamp; mapping(address => bool) public allowed; event MonitorChangeInitiated(address oldMonitor, address newMonitor); event MonitorChangeCanceled(); event MonitorChangeFinished(address monitor); event MonitorChangeReverted(address monitor); // if someone who is allowed become malicious, owner can't be changed modifier onlyAllowed() { require(allowed[msg.sender] || msg.sender == owner); _; } modifier onlyMonitor() { require (msg.sender == monitor); _; } constructor(uint _changePeriod) public { CHANGE_PERIOD = _changePeriod * 1 days; } /// @notice Only monitor contract is able to call execute on users proxy /// @param _owner Address of cdp owner (users DSProxy address) /// @param _aaveSaverProxy Address of AaveSaverProxy /// @param _data Data to send to AaveSaverProxy function callExecute(address _owner, address _aaveSaverProxy, bytes memory _data) public payable onlyMonitor { // execute reverts if calling specific method fails DSProxyInterface(_owner).execute{value: msg.value}(_aaveSaverProxy, _data); // return if anything left if (address(this).balance > 0) { msg.sender.transfer(address(this).balance); } } /// @notice Allowed users are able to set Monitor contract without any waiting period first time /// @param _monitor Address of Monitor contract function setMonitor(address _monitor) public onlyAllowed { require(monitor == address(0)); monitor = _monitor; } /// @notice Allowed users are able to start procedure for changing monitor /// @dev after CHANGE_PERIOD needs to call confirmNewMonitor to actually make a change /// @param _newMonitor address of new monitor function changeMonitor(address _newMonitor) public onlyAllowed { require(changeRequestedTimestamp == 0); changeRequestedTimestamp = now; lastMonitor = monitor; newMonitor = _newMonitor; emit MonitorChangeInitiated(lastMonitor, newMonitor); } /// @notice At any point allowed users are able to cancel monitor change function cancelMonitorChange() public onlyAllowed { require(changeRequestedTimestamp > 0); changeRequestedTimestamp = 0; newMonitor = address(0); emit MonitorChangeCanceled(); } /// @notice Anyone is able to confirm new monitor after CHANGE_PERIOD if process is started function confirmNewMonitor() public onlyAllowed { require((changeRequestedTimestamp + CHANGE_PERIOD) < now); require(changeRequestedTimestamp != 0); require(newMonitor != address(0)); monitor = newMonitor; newMonitor = address(0); changeRequestedTimestamp = 0; emit MonitorChangeFinished(monitor); } /// @notice Its possible to revert monitor to last used monitor function revertMonitor() public onlyAllowed { require(lastMonitor != address(0)); monitor = lastMonitor; emit MonitorChangeReverted(monitor); } /// @notice Allowed users are able to add new allowed user /// @param _user Address of user that will be allowed function addAllowed(address _user) public onlyAllowed { allowed[_user] = true; } /// @notice Allowed users are able to remove allowed user /// @dev owner is always allowed even if someone tries to remove it from allowed mapping /// @param _user Address of allowed user function removeAllowed(address _user) public onlyAllowed { allowed[_user] = false; } function setChangePeriod(uint _periodInDays) public onlyAllowed { require(_periodInDays * 1 days > CHANGE_PERIOD); CHANGE_PERIOD = _periodInDays * 1 days; } /// @notice In case something is left in contract, owner is able to withdraw it /// @param _token address of token to withdraw balance function withdrawToken(address _token) public onlyOwner { uint balance = ERC20(_token).balanceOf(address(this)); ERC20(_token).safeTransfer(msg.sender, balance); } /// @notice In case something is left in contract, owner is able to withdraw it function withdrawEth() public onlyOwner { uint balance = address(this).balance; msg.sender.transfer(balance); } } contract AaveSubscriptions is AdminAuth { struct AaveHolder { address user; uint128 minRatio; uint128 maxRatio; uint128 optimalRatioBoost; uint128 optimalRatioRepay; bool boostEnabled; } struct SubPosition { uint arrPos; bool subscribed; } AaveHolder[] public subscribers; mapping (address => SubPosition) public subscribersPos; uint public changeIndex; event Subscribed(address indexed user); event Unsubscribed(address indexed user); event Updated(address indexed user); event ParamUpdates(address indexed user, uint128, uint128, uint128, uint128, bool); /// @dev Called by the DSProxy contract which owns the Aave position /// @notice Adds the users Aave poistion in the list of subscriptions so it can be monitored /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalBoost Ratio amount which boost should target /// @param _optimalRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled function subscribe(uint128 _minRatio, uint128 _maxRatio, uint128 _optimalBoost, uint128 _optimalRepay, bool _boostEnabled) external { // if boost is not enabled, set max ratio to max uint uint128 localMaxRatio = _boostEnabled ? _maxRatio : uint128(-1); require(checkParams(_minRatio, localMaxRatio), "Must be correct params"); SubPosition storage subInfo = subscribersPos[msg.sender]; AaveHolder memory subscription = AaveHolder({ minRatio: _minRatio, maxRatio: localMaxRatio, optimalRatioBoost: _optimalBoost, optimalRatioRepay: _optimalRepay, user: msg.sender, boostEnabled: _boostEnabled }); changeIndex++; if (subInfo.subscribed) { subscribers[subInfo.arrPos] = subscription; emit Updated(msg.sender); emit ParamUpdates(msg.sender, _minRatio, localMaxRatio, _optimalBoost, _optimalRepay, _boostEnabled); } else { subscribers.push(subscription); subInfo.arrPos = subscribers.length - 1; subInfo.subscribed = true; emit Subscribed(msg.sender); } } /// @notice Called by the users DSProxy /// @dev Owner who subscribed cancels his subscription function unsubscribe() external { _unsubscribe(msg.sender); } /// @dev Checks limit if minRatio is bigger than max /// @param _minRatio Minimum ratio, bellow which repay can be triggered /// @param _maxRatio Maximum ratio, over which boost can be triggered /// @return Returns bool if the params are correct function checkParams(uint128 _minRatio, uint128 _maxRatio) internal pure returns (bool) { if (_minRatio > _maxRatio) { return false; } return true; } /// @dev Internal method to remove a subscriber from the list /// @param _user The actual address that owns the Aave position function _unsubscribe(address _user) internal { require(subscribers.length > 0, "Must have subscribers in the list"); SubPosition storage subInfo = subscribersPos[_user]; require(subInfo.subscribed, "Must first be subscribed"); address lastOwner = subscribers[subscribers.length - 1].user; SubPosition storage subInfo2 = subscribersPos[lastOwner]; subInfo2.arrPos = subInfo.arrPos; subscribers[subInfo.arrPos] = subscribers[subscribers.length - 1]; subscribers.pop(); // remove last element and reduce arr length changeIndex++; subInfo.subscribed = false; subInfo.arrPos = 0; emit Unsubscribed(msg.sender); } /// @dev Checks if the user is subscribed /// @param _user The actual address that owns the Aave position /// @return If the user is subscribed function isSubscribed(address _user) public view returns (bool) { SubPosition storage subInfo = subscribersPos[_user]; return subInfo.subscribed; } /// @dev Returns subscribtion information about a user /// @param _user The actual address that owns the Aave position /// @return Subscription information about the user if exists function getHolder(address _user) public view returns (AaveHolder memory) { SubPosition storage subInfo = subscribersPos[_user]; return subscribers[subInfo.arrPos]; } /// @notice Helper method to return all the subscribed CDPs /// @return List of all subscribers function getSubscribers() public view returns (AaveHolder[] memory) { return subscribers; } /// @notice Helper method for the frontend, returns all the subscribed CDPs paginated /// @param _page What page of subscribers you want /// @param _perPage Number of entries per page /// @return List of all subscribers for that page function getSubscribersByPage(uint _page, uint _perPage) public view returns (AaveHolder[] memory) { AaveHolder[] memory holders = new AaveHolder[](_perPage); uint start = _page * _perPage; uint end = start + _perPage; end = (end > holders.length) ? holders.length : end; uint count = 0; for (uint i = start; i < end; i++) { holders[count] = subscribers[i]; count++; } return holders; } ////////////// ADMIN METHODS /////////////////// /// @notice Admin function to unsubscribe a position /// @param _user The actual address that owns the Aave position function unsubscribeByAdmin(address _user) public onlyOwner { SubPosition storage subInfo = subscribersPos[_user]; if (subInfo.subscribed) { _unsubscribe(_user); } } } contract AaveSubscriptionsProxy is ProxyPermission { address public constant AAVE_SUBSCRIPTION_ADDRESS = 0xe08ff7A2BADb634F0b581E675E6B3e583De086FC; address public constant AAVE_MONITOR_PROXY = 0xfA560Dba3a8D0B197cA9505A2B98120DD89209AC; /// @notice Calls subscription contract and creates a DSGuard if non existent /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalRatioBoost Ratio amount which boost should target /// @param _optimalRatioRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled function subscribe( uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled ) public { givePermission(AAVE_MONITOR_PROXY); IAaveSubscription(AAVE_SUBSCRIPTION_ADDRESS).subscribe( _minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled); } /// @notice Calls subscription contract and updated existing parameters /// @dev If subscription is non existent this will create one /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalRatioBoost Ratio amount which boost should target /// @param _optimalRatioRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled function update( uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled ) public { IAaveSubscription(AAVE_SUBSCRIPTION_ADDRESS).subscribe(_minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled); } /// @notice Calls the subscription contract to unsubscribe the caller function unsubscribe() public { removePermission(AAVE_MONITOR_PROXY); IAaveSubscription(AAVE_SUBSCRIPTION_ADDRESS).unsubscribe(); } } contract AaveImport is AaveHelper, AdminAuth { using SafeERC20 for ERC20; address public constant WETH_ADDRESS = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address public constant BASIC_PROXY = 0x29F4af15ad64C509c4140324cFE71FB728D10d2B; address public constant AETH_ADDRESS = 0x3a3A65aAb0dd2A17E3F1947bA16138cd37d08c04; function callFunction( address sender, Account.Info memory account, bytes memory data ) public { ( address collateralToken, address borrowToken, uint256 ethAmount, address user, address proxy ) = abi.decode(data, (address,address,uint256,address,address)); // withdraw eth TokenInterface(WETH_ADDRESS).withdraw(ethAmount); address lendingPoolCoreAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); address aCollateralToken = ILendingPool(lendingPoolCoreAddress).getReserveATokenAddress(collateralToken); address aBorrowToken = ILendingPool(lendingPoolCoreAddress).getReserveATokenAddress(borrowToken); uint256 globalBorrowAmount = 0; { // avoid stack too deep // deposit eth on behalf of proxy DSProxy(payable(proxy)).execute{value: ethAmount}(BASIC_PROXY, abi.encodeWithSignature("deposit(address,uint256)", ETH_ADDR, ethAmount)); // borrow needed amount to repay users borrow (,uint256 borrowAmount,,uint256 borrowRateMode,,,uint256 originationFee,,,) = ILendingPool(lendingPool).getUserReserveData(borrowToken, user); borrowAmount += originationFee; DSProxy(payable(proxy)).execute(BASIC_PROXY, abi.encodeWithSignature("borrow(address,uint256,uint256)", borrowToken, borrowAmount, borrowRateMode)); globalBorrowAmount = borrowAmount; } // payback on behalf of user if (borrowToken != ETH_ADDR) { ERC20(borrowToken).safeApprove(proxy, globalBorrowAmount); DSProxy(payable(proxy)).execute(BASIC_PROXY, abi.encodeWithSignature("paybackOnBehalf(address,address,uint256,bool,address)", borrowToken, aBorrowToken, 0, true, user)); } else { DSProxy(payable(proxy)).execute{value: globalBorrowAmount}(BASIC_PROXY, abi.encodeWithSignature("paybackOnBehalf(address,address,uint256,bool,address)", borrowToken, aBorrowToken, 0, true, user)); } // pull tokens from user to proxy ERC20(aCollateralToken).safeTransferFrom(user, proxy, ERC20(aCollateralToken).balanceOf(user)); // enable as collateral DSProxy(payable(proxy)).execute(BASIC_PROXY, abi.encodeWithSignature("setUserUseReserveAsCollateralIfNeeded(address)", collateralToken)); // withdraw deposited eth DSProxy(payable(proxy)).execute(BASIC_PROXY, abi.encodeWithSignature("withdraw(address,address,uint256,bool)", ETH_ADDR, AETH_ADDRESS, ethAmount, false)); // deposit eth, get weth and return to sender TokenInterface(WETH_ADDRESS).deposit.value(address(this).balance)(); ERC20(WETH_ADDRESS).safeTransfer(proxy, ethAmount+2); } /// @dev if contract receive eth, convert it to WETH receive() external payable { // deposit eth and get weth if (msg.sender == owner) { TokenInterface(WETH_ADDRESS).deposit.value(address(this).balance)(); } } } contract AaveImportTaker is DydxFlashLoanBase, ProxyPermission { address public constant WETH_ADDR = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address payable public constant AAVE_IMPORT = 0x11c937fD367D75465DC211c367684d8d4520E6f9; address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; address public constant PROXY_REGISTRY_ADDRESS = 0x4678f0a6958e4D2Bc4F1BAF7Bc52E8F3564f3fE4; /// @notice Starts the process to move users position 1 collateral and 1 borrow /// @dev User must send 2 wei with this transaction /// @dev User must approve AaveImport to pull _aCollateralToken /// @param _collateralToken Collateral token we are moving to DSProxy /// @param _borrowToken Borrow token we are moving to DSProxy /// @param _ethAmount ETH amount that needs to be pulled from dydx function importLoan(address _collateralToken, address _borrowToken, uint _ethAmount) public { ISoloMargin solo = ISoloMargin(SOLO_MARGIN_ADDRESS); // Get marketId from token address uint256 marketId = _getMarketIdFromTokenAddress(WETH_ADDR); // Calculate repay amount (_amount + (2 wei)) // Approve transfer from uint256 repayAmount = _getRepaymentAmountInternal(_ethAmount); ERC20(WETH_ADDR).approve(SOLO_MARGIN_ADDRESS, repayAmount); Actions.ActionArgs[] memory operations = new Actions.ActionArgs[](3); operations[0] = _getWithdrawAction(marketId, _ethAmount, AAVE_IMPORT); operations[1] = _getCallAction( abi.encode(_collateralToken, _borrowToken, _ethAmount, msg.sender, address(this)), AAVE_IMPORT ); operations[2] = _getDepositAction(marketId, repayAmount, address(this)); Account.Info[] memory accountInfos = new Account.Info[](1); accountInfos[0] = _getAccountInfo(); givePermission(AAVE_IMPORT); solo.operate(accountInfos, operations); removePermission(AAVE_IMPORT); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "AaveImport", abi.encode(_collateralToken, _borrowToken)); } } contract CompoundBasicProxy is GasBurner { address public constant ETH_ADDR = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant COMPTROLLER_ADDR = 0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B; using SafeERC20 for ERC20; /// @notice User deposits tokens to the Compound protocol /// @dev User needs to approve the DSProxy to pull the _tokenAddr tokens /// @param _tokenAddr The address of the token to be deposited /// @param _cTokenAddr CTokens to be deposited /// @param _amount Amount of tokens to be deposited /// @param _inMarket True if the token is already in market for that address function deposit(address _tokenAddr, address _cTokenAddr, uint _amount, bool _inMarket) public burnGas(5) payable { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(this), _amount); } approveToken(_tokenAddr, _cTokenAddr); if (!_inMarket) { enterMarket(_cTokenAddr); } if (_tokenAddr != ETH_ADDR) { require(CTokenInterface(_cTokenAddr).mint(_amount) == 0); } else { CEtherInterface(_cTokenAddr).mint{value: msg.value}(); // reverts on fail } } /// @notice User withdraws tokens to the Compound protocol /// @param _tokenAddr The address of the token to be withdrawn /// @param _cTokenAddr CTokens to be withdrawn /// @param _amount Amount of tokens to be withdrawn /// @param _isCAmount If true _amount is cTokens if falls _amount is underlying tokens function withdraw(address _tokenAddr, address _cTokenAddr, uint _amount, bool _isCAmount) public burnGas(5) { if (_isCAmount) { require(CTokenInterface(_cTokenAddr).redeem(_amount) == 0); } else { require(CTokenInterface(_cTokenAddr).redeemUnderlying(_amount) == 0); } // withdraw funds to msg.sender if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransfer(msg.sender, ERC20(_tokenAddr).balanceOf(address(this))); } else { msg.sender.transfer(address(this).balance); } } /// @notice User borrows tokens to the Compound protocol /// @param _tokenAddr The address of the token to be borrowed /// @param _cTokenAddr CTokens to be borrowed /// @param _amount Amount of tokens to be borrowed /// @param _inMarket True if the token is already in market for that address function borrow(address _tokenAddr, address _cTokenAddr, uint _amount, bool _inMarket) public burnGas(8) { if (!_inMarket) { enterMarket(_cTokenAddr); } require(CTokenInterface(_cTokenAddr).borrow(_amount) == 0); // withdraw funds to msg.sender if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransfer(msg.sender, ERC20(_tokenAddr).balanceOf(address(this))); } else { msg.sender.transfer(address(this).balance); } } /// @dev User needs to approve the DSProxy to pull the _tokenAddr tokens /// @notice User paybacks tokens to the Compound protocol /// @param _tokenAddr The address of the token to be paybacked /// @param _cTokenAddr CTokens to be paybacked /// @param _amount Amount of tokens to be payedback /// @param _wholeDebt If true the _amount will be set to the whole amount of the debt function payback(address _tokenAddr, address _cTokenAddr, uint _amount, bool _wholeDebt) public burnGas(5) payable { approveToken(_tokenAddr, _cTokenAddr); if (_wholeDebt) { _amount = CTokenInterface(_cTokenAddr).borrowBalanceCurrent(address(this)); } if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(this), _amount); require(CTokenInterface(_cTokenAddr).repayBorrow(_amount) == 0); } else { CEtherInterface(_cTokenAddr).repayBorrow{value: msg.value}(); msg.sender.transfer(address(this).balance); // send back the extra eth } } /// @notice Helper method to withdraw tokens from the DSProxy /// @param _tokenAddr Address of the token to be withdrawn function withdrawTokens(address _tokenAddr) public { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransfer(msg.sender, ERC20(_tokenAddr).balanceOf(address(this))); } else { msg.sender.transfer(address(this).balance); } } /// @notice Enters the Compound market so it can be deposited/borrowed /// @param _cTokenAddr CToken address of the token function enterMarket(address _cTokenAddr) public { address[] memory markets = new address[](1); markets[0] = _cTokenAddr; ComptrollerInterface(COMPTROLLER_ADDR).enterMarkets(markets); } /// @notice Exits the Compound market so it can't be deposited/borrowed /// @param _cTokenAddr CToken address of the token function exitMarket(address _cTokenAddr) public { ComptrollerInterface(COMPTROLLER_ADDR).exitMarket(_cTokenAddr); } /// @notice Approves CToken contract to pull underlying tokens from the DSProxy /// @param _tokenAddr Token we are trying to approve /// @param _cTokenAddr Address which will gain the approval function approveToken(address _tokenAddr, address _cTokenAddr) internal { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeApprove(_cTokenAddr, uint(-1)); } } } contract CompoundSafetyRatio is Exponential, DSMath { // solhint-disable-next-line const-name-snakecase ComptrollerInterface public constant comp = ComptrollerInterface(0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B); /// @notice Calcualted the ratio of debt / adjusted collateral /// @param _user Address of the user function getSafetyRatio(address _user) public view returns (uint) { // For each asset the account is in address[] memory assets = comp.getAssetsIn(_user); address oracleAddr = comp.oracle(); uint sumCollateral = 0; uint sumBorrow = 0; for (uint i = 0; i < assets.length; i++) { address asset = assets[i]; (, uint cTokenBalance, uint borrowBalance, uint exchangeRateMantissa) = CTokenInterface(asset).getAccountSnapshot(_user); Exp memory oraclePrice; if (cTokenBalance != 0 || borrowBalance != 0) { oraclePrice = Exp({mantissa: CompoundOracleInterface(oracleAddr).getUnderlyingPrice(asset)}); } // Sum up collateral in Usd if (cTokenBalance != 0) { (, uint collFactorMantissa) = comp.markets(address(asset)); Exp memory collateralFactor = Exp({mantissa: collFactorMantissa}); Exp memory exchangeRate = Exp({mantissa: exchangeRateMantissa}); (, Exp memory tokensToUsd) = mulExp3(collateralFactor, exchangeRate, oraclePrice); (, sumCollateral) = mulScalarTruncateAddUInt(tokensToUsd, cTokenBalance, sumCollateral); } // Sum up debt in Usd if (borrowBalance != 0) { (, sumBorrow) = mulScalarTruncateAddUInt(oraclePrice, borrowBalance, sumBorrow); } } if (sumBorrow == 0) return uint(-1); uint borrowPowerUsed = (sumBorrow * 10**18) / sumCollateral; return wdiv(1e18, borrowPowerUsed); } } contract CompoundMonitor is AdminAuth, DSMath, CompoundSafetyRatio, GasBurner { using SafeERC20 for ERC20; enum Method { Boost, Repay } uint public REPAY_GAS_TOKEN = 20; uint public BOOST_GAS_TOKEN = 20; uint constant public MAX_GAS_PRICE = 500000000000; // 500 gwei uint public REPAY_GAS_COST = 2000000; uint public BOOST_GAS_COST = 2000000; address public constant GAS_TOKEN_INTERFACE_ADDRESS = 0x0000000000b3F879cb30FE243b4Dfee438691c04; address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; address public constant BOT_REGISTRY_ADDRESS = 0x637726f8b08a7ABE3aE3aCaB01A80E2d8ddeF77B; CompoundMonitorProxy public compoundMonitorProxy; CompoundSubscriptions public subscriptionsContract; address public compoundFlashLoanTakerAddress; DefisaverLogger public logger = DefisaverLogger(DEFISAVER_LOGGER); modifier onlyApproved() { require(BotRegistry(BOT_REGISTRY_ADDRESS).botList(msg.sender), "Not auth bot"); _; } /// @param _compoundMonitorProxy Proxy contracts that actually is authorized to call DSProxy /// @param _subscriptions Subscriptions contract for Compound positions /// @param _compoundFlashLoanTaker Contract that actually performs Repay/Boost constructor(address _compoundMonitorProxy, address _subscriptions, address _compoundFlashLoanTaker) public { compoundMonitorProxy = CompoundMonitorProxy(_compoundMonitorProxy); subscriptionsContract = CompoundSubscriptions(_subscriptions); compoundFlashLoanTakerAddress = _compoundFlashLoanTaker; } /// @notice Bots call this method to repay for user when conditions are met /// @dev If the contract ownes gas token it will try and use it for gas price reduction /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress, exchangeAddress] /// @param _user The actual address that owns the Compound position function repayFor( SaverExchangeCore.ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress address _user ) public payable onlyApproved burnGas(REPAY_GAS_TOKEN) { (bool isAllowed, uint ratioBefore) = canCall(Method.Repay, _user); require(isAllowed); // check if conditions are met uint256 gasCost = calcGasCost(REPAY_GAS_COST); compoundMonitorProxy.callExecute{value: msg.value}( _user, compoundFlashLoanTakerAddress, abi.encodeWithSignature( "repayWithLoan((address,address,uint256,uint256,uint256,address,address,bytes,uint256),address[2],uint256)", _exData, _cAddresses, gasCost ) ); (bool isGoodRatio, uint ratioAfter) = ratioGoodAfter(Method.Repay, _user); require(isGoodRatio); // check if the after result of the actions is good returnEth(); logger.Log(address(this), _user, "AutomaticCompoundRepay", abi.encode(ratioBefore, ratioAfter)); } /// @notice Bots call this method to boost for user when conditions are met /// @dev If the contract ownes gas token it will try and use it for gas price reduction /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress, exchangeAddress] /// @param _user The actual address that owns the Compound position function boostFor( SaverExchangeCore.ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress address _user ) public payable onlyApproved burnGas(BOOST_GAS_TOKEN) { (bool isAllowed, uint ratioBefore) = canCall(Method.Boost, _user); require(isAllowed); // check if conditions are met uint256 gasCost = calcGasCost(BOOST_GAS_COST); compoundMonitorProxy.callExecute{value: msg.value}( _user, compoundFlashLoanTakerAddress, abi.encodeWithSignature( "boostWithLoan((address,address,uint256,uint256,uint256,address,address,bytes,uint256),address[2],uint256)", _exData, _cAddresses, gasCost ) ); (bool isGoodRatio, uint ratioAfter) = ratioGoodAfter(Method.Boost, _user); require(isGoodRatio); // check if the after result of the actions is good returnEth(); logger.Log(address(this), _user, "AutomaticCompoundBoost", abi.encode(ratioBefore, ratioAfter)); } /******************* INTERNAL METHODS ********************************/ function returnEth() internal { // return if some eth left if (address(this).balance > 0) { msg.sender.transfer(address(this).balance); } } /******************* STATIC METHODS ********************************/ /// @notice Checks if Boost/Repay could be triggered for the CDP /// @dev Called by MCDMonitor to enforce the min/max check /// @param _method Type of action to be called /// @param _user The actual address that owns the Compound position /// @return Boolean if it can be called and the ratio function canCall(Method _method, address _user) public view returns(bool, uint) { bool subscribed = subscriptionsContract.isSubscribed(_user); CompoundSubscriptions.CompoundHolder memory holder = subscriptionsContract.getHolder(_user); // check if cdp is subscribed if (!subscribed) return (false, 0); // check if boost and boost allowed if (_method == Method.Boost && !holder.boostEnabled) return (false, 0); uint currRatio = getSafetyRatio(_user); if (_method == Method.Repay) { return (currRatio < holder.minRatio, currRatio); } else if (_method == Method.Boost) { return (currRatio > holder.maxRatio, currRatio); } } /// @dev After the Boost/Repay check if the ratio doesn't trigger another call /// @param _method Type of action to be called /// @param _user The actual address that owns the Compound position /// @return Boolean if the recent action preformed correctly and the ratio function ratioGoodAfter(Method _method, address _user) public view returns(bool, uint) { CompoundSubscriptions.CompoundHolder memory holder; holder= subscriptionsContract.getHolder(_user); uint currRatio = getSafetyRatio(_user); if (_method == Method.Repay) { return (currRatio < holder.maxRatio, currRatio); } else if (_method == Method.Boost) { return (currRatio > holder.minRatio, currRatio); } } /// @notice Calculates gas cost (in Eth) of tx /// @dev Gas price is limited to MAX_GAS_PRICE to prevent attack of draining user CDP /// @param _gasAmount Amount of gas used for the tx function calcGasCost(uint _gasAmount) public view returns (uint) { uint gasPrice = tx.gasprice <= MAX_GAS_PRICE ? tx.gasprice : MAX_GAS_PRICE; return mul(gasPrice, _gasAmount); } /******************* OWNER ONLY OPERATIONS ********************************/ /// @notice Allows owner to change gas cost for boost operation, but only up to 3 millions /// @param _gasCost New gas cost for boost method function changeBoostGasCost(uint _gasCost) public onlyOwner { require(_gasCost < 3000000); BOOST_GAS_COST = _gasCost; } /// @notice Allows owner to change gas cost for repay operation, but only up to 3 millions /// @param _gasCost New gas cost for repay method function changeRepayGasCost(uint _gasCost) public onlyOwner { require(_gasCost < 3000000); REPAY_GAS_COST = _gasCost; } /// @notice If any tokens gets stuck in the contract owner can withdraw it /// @param _tokenAddress Address of the ERC20 token /// @param _to Address of the receiver /// @param _amount The amount to be sent function transferERC20(address _tokenAddress, address _to, uint _amount) public onlyOwner { ERC20(_tokenAddress).safeTransfer(_to, _amount); } /// @notice If any Eth gets stuck in the contract owner can withdraw it /// @param _to Address of the receiver /// @param _amount The amount to be sent function transferEth(address payable _to, uint _amount) public onlyOwner { _to.transfer(_amount); } } contract CompBalance is Exponential, GasBurner { ComptrollerInterface public constant comp = ComptrollerInterface(0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B); address public constant COMP_ADDR = 0xc00e94Cb662C3520282E6f5717214004A7f26888; uint224 public constant compInitialIndex = 1e36; function claimComp(address _user, address[] memory _cTokensSupply, address[] memory _cTokensBorrow) public burnGas(8) { _claim(_user, _cTokensSupply, _cTokensBorrow); ERC20(COMP_ADDR).transfer(msg.sender, ERC20(COMP_ADDR).balanceOf(address(this))); } function _claim(address _user, address[] memory _cTokensSupply, address[] memory _cTokensBorrow) internal { address[] memory u = new address[](1); u[0] = _user; comp.claimComp(u, _cTokensSupply, false, true); comp.claimComp(u, _cTokensBorrow, true, false); } function getBalance(address _user, address[] memory _cTokens) public view returns (uint) { uint compBalance = 0; for(uint i = 0; i < _cTokens.length; ++i) { compBalance += getSuppyBalance(_cTokens[i], _user); compBalance += getBorrowBalance(_cTokens[i], _user); } compBalance += ERC20(COMP_ADDR).balanceOf(_user); return compBalance; } function getSuppyBalance(address _cToken, address _supplier) public view returns (uint supplierAccrued) { ComptrollerInterface.CompMarketState memory supplyState = comp.compSupplyState(_cToken); Double memory supplyIndex = Double({mantissa: supplyState.index}); Double memory supplierIndex = Double({mantissa: comp.compSupplierIndex(_cToken, _supplier)}); if (supplierIndex.mantissa == 0 && supplyIndex.mantissa > 0) { supplierIndex.mantissa = compInitialIndex; } Double memory deltaIndex = sub_(supplyIndex, supplierIndex); uint supplierTokens = CTokenInterface(_cToken).balanceOf(_supplier); uint supplierDelta = mul_(supplierTokens, deltaIndex); supplierAccrued = add_(comp.compAccrued(_supplier), supplierDelta); } function getBorrowBalance(address _cToken, address _borrower) public view returns (uint borrowerAccrued) { ComptrollerInterface.CompMarketState memory borrowState = comp.compBorrowState(_cToken); Double memory borrowIndex = Double({mantissa: borrowState.index}); Double memory borrowerIndex = Double({mantissa: comp.compBorrowerIndex(_cToken, _borrower)}); Exp memory marketBorrowIndex = Exp({mantissa: CTokenInterface(_cToken).borrowIndex()}); if (borrowerIndex.mantissa > 0) { Double memory deltaIndex = sub_(borrowIndex, borrowerIndex); uint borrowerAmount = div_(CTokenInterface(_cToken).borrowBalanceStored(_borrower), marketBorrowIndex); uint borrowerDelta = mul_(borrowerAmount, deltaIndex); borrowerAccrued = add_(comp.compAccrued(_borrower), borrowerDelta); } } } contract CompoundSaverHelper is DSMath, Exponential { using SafeERC20 for ERC20; address payable public constant WALLET_ADDR = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; address public constant DISCOUNT_ADDR = 0x1b14E8D511c9A4395425314f849bD737BAF8208F; uint public constant MANUAL_SERVICE_FEE = 400; // 0.25% Fee uint public constant AUTOMATIC_SERVICE_FEE = 333; // 0.3% Fee address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant CETH_ADDRESS = 0x4Ddc2D193948926D02f9B1fE9e1daa0718270ED5; address public constant COMPTROLLER = 0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B; address public constant COMPOUND_LOGGER = 0x3DD0CDf5fFA28C6847B4B276e2fD256046a44bb7; address public constant BOT_REGISTRY_ADDRESS = 0x637726f8b08a7ABE3aE3aCaB01A80E2d8ddeF77B; /// @notice Helper method to payback the Compound debt /// @dev If amount is bigger it will repay the whole debt and send the extra to the _user /// @param _amount Amount of tokens we want to repay /// @param _cBorrowToken Ctoken address we are repaying /// @param _borrowToken Token address we are repaying /// @param _user Owner of the compound position we are paying back function paybackDebt(uint _amount, address _cBorrowToken, address _borrowToken, address payable _user) internal { uint wholeDebt = CTokenInterface(_cBorrowToken).borrowBalanceCurrent(address(this)); if (_amount > wholeDebt) { if (_borrowToken == ETH_ADDRESS) { _user.transfer((_amount - wholeDebt)); } else { ERC20(_borrowToken).safeTransfer(_user, (_amount - wholeDebt)); } _amount = wholeDebt; } approveCToken(_borrowToken, _cBorrowToken); if (_borrowToken == ETH_ADDRESS) { CEtherInterface(_cBorrowToken).repayBorrow{value: _amount}(); } else { require(CTokenInterface(_cBorrowToken).repayBorrow(_amount) == 0); } } /// @notice Calculates the fee amount /// @param _amount Amount that is converted /// @param _user Actuall user addr not DSProxy /// @param _gasCost Ether amount of gas we are spending for tx /// @param _cTokenAddr CToken addr. of token we are getting for the fee /// @return feeAmount The amount we took for the fee function getFee(uint _amount, address _user, uint _gasCost, address _cTokenAddr) internal returns (uint feeAmount) { uint fee = MANUAL_SERVICE_FEE; if (BotRegistry(BOT_REGISTRY_ADDRESS).botList(tx.origin)) { fee = AUTOMATIC_SERVICE_FEE; } address tokenAddr = getUnderlyingAddr(_cTokenAddr); if (Discount(DISCOUNT_ADDR).isCustomFeeSet(_user)) { fee = Discount(DISCOUNT_ADDR).getCustomServiceFee(_user); } feeAmount = (fee == 0) ? 0 : (_amount / fee); if (_gasCost != 0) { address oracle = ComptrollerInterface(COMPTROLLER).oracle(); uint usdTokenPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(_cTokenAddr); uint ethPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(CETH_ADDRESS); uint tokenPriceInEth = wdiv(usdTokenPrice, ethPrice); _gasCost = wdiv(_gasCost, tokenPriceInEth); feeAmount = add(feeAmount, _gasCost); } // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } if (tokenAddr == ETH_ADDRESS) { WALLET_ADDR.transfer(feeAmount); } else { ERC20(tokenAddr).safeTransfer(WALLET_ADDR, feeAmount); } } /// @notice Calculates the gas cost of transaction and send it to wallet /// @param _amount Amount that is converted /// @param _gasCost Ether amount of gas we are spending for tx /// @param _cTokenAddr CToken addr. of token we are getting for the fee /// @return feeAmount The amount we took for the fee function getGasCost(uint _amount, uint _gasCost, address _cTokenAddr) internal returns (uint feeAmount) { address tokenAddr = getUnderlyingAddr(_cTokenAddr); if (_gasCost != 0) { address oracle = ComptrollerInterface(COMPTROLLER).oracle(); uint usdTokenPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(_cTokenAddr); uint ethPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(CETH_ADDRESS); uint tokenPriceInEth = wdiv(usdTokenPrice, ethPrice); feeAmount = wdiv(_gasCost, tokenPriceInEth); } // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } if (tokenAddr == ETH_ADDRESS) { WALLET_ADDR.transfer(feeAmount); } else { ERC20(tokenAddr).safeTransfer(WALLET_ADDR, feeAmount); } } /// @notice Enters the market for the collatera and borrow tokens /// @param _cTokenAddrColl Collateral address we are entering the market in /// @param _cTokenAddrBorrow Borrow address we are entering the market in function enterMarket(address _cTokenAddrColl, address _cTokenAddrBorrow) internal { address[] memory markets = new address[](2); markets[0] = _cTokenAddrColl; markets[1] = _cTokenAddrBorrow; ComptrollerInterface(COMPTROLLER).enterMarkets(markets); } /// @notice Approves CToken contract to pull underlying tokens from the DSProxy /// @param _tokenAddr Token we are trying to approve /// @param _cTokenAddr Address which will gain the approval function approveCToken(address _tokenAddr, address _cTokenAddr) internal { if (_tokenAddr != ETH_ADDRESS) { ERC20(_tokenAddr).safeApprove(_cTokenAddr, uint(-1)); } } /// @notice Returns the underlying address of the cToken asset /// @param _cTokenAddress cToken address /// @return Token address of the cToken specified function getUnderlyingAddr(address _cTokenAddress) internal returns (address) { if (_cTokenAddress == CETH_ADDRESS) { return ETH_ADDRESS; } else { return CTokenInterface(_cTokenAddress).underlying(); } } /// @notice Returns the owner of the DSProxy that called the contract function getUserAddress() internal view returns (address) { DSProxy proxy = DSProxy(uint160(address(this))); return proxy.owner(); } /// @notice Returns the maximum amount of collateral available to withdraw /// @dev Due to rounding errors the result is - 1% wei from the exact amount /// @param _cCollAddress Collateral we are getting the max value of /// @param _account Users account /// @return Returns the max. collateral amount in that token function getMaxCollateral(address _cCollAddress, address _account) public returns (uint) { (, uint liquidityInUsd, ) = ComptrollerInterface(COMPTROLLER).getAccountLiquidity(_account); uint usersBalance = CTokenInterface(_cCollAddress).balanceOfUnderlying(_account); address oracle = ComptrollerInterface(COMPTROLLER).oracle(); if (liquidityInUsd == 0) return usersBalance; CTokenInterface(_cCollAddress).accrueInterest(); (, uint collFactorMantissa) = ComptrollerInterface(COMPTROLLER).markets(_cCollAddress); Exp memory collateralFactor = Exp({mantissa: collFactorMantissa}); (, uint tokensToUsd) = divScalarByExpTruncate(liquidityInUsd, collateralFactor); uint usdPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(_cCollAddress); uint liqInToken = wdiv(tokensToUsd, usdPrice); if (liqInToken > usersBalance) return usersBalance; return sub(liqInToken, (liqInToken / 100)); // cut off 1% due to rounding issues } /// @notice Returns the maximum amount of borrow amount available /// @dev Due to rounding errors the result is - 1% wei from the exact amount /// @param _cBorrowAddress Borrow token we are getting the max value of /// @param _account Users account /// @return Returns the max. borrow amount in that token function getMaxBorrow(address _cBorrowAddress, address _account) public returns (uint) { (, uint liquidityInUsd, ) = ComptrollerInterface(COMPTROLLER).getAccountLiquidity(_account); address oracle = ComptrollerInterface(COMPTROLLER).oracle(); CTokenInterface(_cBorrowAddress).accrueInterest(); uint usdPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(_cBorrowAddress); uint liquidityInToken = wdiv(liquidityInUsd, usdPrice); return sub(liquidityInToken, (liquidityInToken / 100)); // cut off 1% due to rounding issues } } contract CompoundImportFlashLoan is FlashLoanReceiverBase { using SafeERC20 for ERC20; ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); address public constant COMPOUND_BORROW_PROXY = 0xb7EDC39bE76107e2Cc645f0f6a3D164f5e173Ee2; address public owner; constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public { owner = msg.sender; } /// @notice Called by Aave when sending back the FL amount /// @param _reserve The address of the borrowed token /// @param _amount Amount of FL tokens received /// @param _fee FL Aave fee /// @param _params The params that are sent from the original FL caller contract function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { ( address cCollateralToken, address cBorrowToken, address user, address proxy ) = abi.decode(_params, (address,address,address,address)); // approve FL tokens so we can repay them ERC20(_reserve).safeApprove(cBorrowToken, 0); ERC20(_reserve).safeApprove(cBorrowToken, uint(-1)); // repay compound debt require(CTokenInterface(cBorrowToken).repayBorrowBehalf(user, uint(-1)) == 0, "Repay borrow behalf fail"); // transfer cTokens to proxy uint cTokenBalance = CTokenInterface(cCollateralToken).balanceOf(user); require(CTokenInterface(cCollateralToken).transferFrom(user, proxy, cTokenBalance)); // borrow bytes memory proxyData = getProxyData(cCollateralToken, cBorrowToken, _reserve, (_amount + _fee)); DSProxyInterface(proxy).execute(COMPOUND_BORROW_PROXY, proxyData); // Repay the loan with the money DSProxy sent back transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); } /// @notice Formats function data call so we can call it through DSProxy /// @param _cCollToken CToken address of collateral /// @param _cBorrowToken CToken address we will borrow /// @param _borrowToken Token address we will borrow /// @param _amount Amount that will be borrowed /// @return proxyData Formated function call data function getProxyData(address _cCollToken, address _cBorrowToken, address _borrowToken, uint _amount) internal pure returns (bytes memory proxyData) { proxyData = abi.encodeWithSignature( "borrow(address,address,address,uint256)", _cCollToken, _cBorrowToken, _borrowToken, _amount); } function withdrawStuckFunds(address _tokenAddr, uint _amount) public { require(owner == msg.sender, "Must be owner"); if (_tokenAddr == 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE) { msg.sender.transfer(_amount); } else { ERC20(_tokenAddr).safeTransfer(owner, _amount); } } } contract CompoundImportTaker is CompoundSaverHelper, ProxyPermission, GasBurner { ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); address payable public constant COMPOUND_IMPORT_FLASH_LOAN = 0xaf9f8781A4c39Ce2122019fC05F22e3a662B0A32; address public constant PROXY_REGISTRY_ADDRESS = 0x4678f0a6958e4D2Bc4F1BAF7Bc52E8F3564f3fE4; DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); /// @notice Starts the process to move users position 1 collateral and 1 borrow /// @dev User must approve COMPOUND_IMPORT_FLASH_LOAN to pull _cCollateralToken /// @param _cCollateralToken Collateral we are moving to DSProxy /// @param _cBorrowToken Borrow token we are moving to DSProxy function importLoan(address _cCollateralToken, address _cBorrowToken) external burnGas(20) { address proxy = getProxy(); uint loanAmount = CTokenInterface(_cBorrowToken).borrowBalanceCurrent(msg.sender); bytes memory paramsData = abi.encode(_cCollateralToken, _cBorrowToken, msg.sender, proxy); givePermission(COMPOUND_IMPORT_FLASH_LOAN); lendingPool.flashLoan(COMPOUND_IMPORT_FLASH_LOAN, getUnderlyingAddr(_cBorrowToken), loanAmount, paramsData); removePermission(COMPOUND_IMPORT_FLASH_LOAN); logger.Log(address(this), msg.sender, "CompoundImport", abi.encode(loanAmount, 0, _cCollateralToken)); } /// @notice Gets proxy address, if user doesn't has DSProxy build it /// @return proxy DsProxy address function getProxy() internal returns (address proxy) { proxy = ProxyRegistryInterface(PROXY_REGISTRY_ADDRESS).proxies(msg.sender); if (proxy == address(0)) { proxy = ProxyRegistryInterface(PROXY_REGISTRY_ADDRESS).build(msg.sender); } } } contract CreamBasicProxy is GasBurner { address public constant ETH_ADDR = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant COMPTROLLER_ADDR = 0x3d5BC3c8d13dcB8bF317092d84783c2697AE9258; using SafeERC20 for ERC20; /// @notice User deposits tokens to the cream protocol /// @dev User needs to approve the DSProxy to pull the _tokenAddr tokens /// @param _tokenAddr The address of the token to be deposited /// @param _cTokenAddr CTokens to be deposited /// @param _amount Amount of tokens to be deposited /// @param _inMarket True if the token is already in market for that address function deposit(address _tokenAddr, address _cTokenAddr, uint _amount, bool _inMarket) public burnGas(5) payable { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(this), _amount); } approveToken(_tokenAddr, _cTokenAddr); if (!_inMarket) { enterMarket(_cTokenAddr); } if (_tokenAddr != ETH_ADDR) { require(CTokenInterface(_cTokenAddr).mint(_amount) == 0); } else { CEtherInterface(_cTokenAddr).mint{value: msg.value}(); // reverts on fail } } /// @notice User withdraws tokens to the cream protocol /// @param _tokenAddr The address of the token to be withdrawn /// @param _cTokenAddr CTokens to be withdrawn /// @param _amount Amount of tokens to be withdrawn /// @param _isCAmount If true _amount is cTokens if falls _amount is underlying tokens function withdraw(address _tokenAddr, address _cTokenAddr, uint _amount, bool _isCAmount) public burnGas(5) { if (_isCAmount) { require(CTokenInterface(_cTokenAddr).redeem(_amount) == 0); } else { require(CTokenInterface(_cTokenAddr).redeemUnderlying(_amount) == 0); } // withdraw funds to msg.sender if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransfer(msg.sender, ERC20(_tokenAddr).balanceOf(address(this))); } else { msg.sender.transfer(address(this).balance); } } /// @notice User borrows tokens to the cream protocol /// @param _tokenAddr The address of the token to be borrowed /// @param _cTokenAddr CTokens to be borrowed /// @param _amount Amount of tokens to be borrowed /// @param _inMarket True if the token is already in market for that address function borrow(address _tokenAddr, address _cTokenAddr, uint _amount, bool _inMarket) public burnGas(8) { if (!_inMarket) { enterMarket(_cTokenAddr); } require(CTokenInterface(_cTokenAddr).borrow(_amount) == 0); // withdraw funds to msg.sender if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransfer(msg.sender, ERC20(_tokenAddr).balanceOf(address(this))); } else { msg.sender.transfer(address(this).balance); } } /// @dev User needs to approve the DSProxy to pull the _tokenAddr tokens /// @notice User paybacks tokens to the cream protocol /// @param _tokenAddr The address of the token to be paybacked /// @param _cTokenAddr CTokens to be paybacked /// @param _amount Amount of tokens to be payedback /// @param _wholeDebt If true the _amount will be set to the whole amount of the debt function payback(address _tokenAddr, address _cTokenAddr, uint _amount, bool _wholeDebt) public burnGas(5) payable { approveToken(_tokenAddr, _cTokenAddr); if (_wholeDebt) { _amount = CTokenInterface(_cTokenAddr).borrowBalanceCurrent(address(this)); } if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(this), _amount); require(CTokenInterface(_cTokenAddr).repayBorrow(_amount) == 0); } else { CEtherInterface(_cTokenAddr).repayBorrow{value: msg.value}(); msg.sender.transfer(address(this).balance); // send back the extra eth } } /// @notice Helper method to withdraw tokens from the DSProxy /// @param _tokenAddr Address of the token to be withdrawn function withdrawTokens(address _tokenAddr) public { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransfer(msg.sender, ERC20(_tokenAddr).balanceOf(address(this))); } else { msg.sender.transfer(address(this).balance); } } /// @notice Enters the cream market so it can be deposited/borrowed /// @param _cTokenAddr CToken address of the token function enterMarket(address _cTokenAddr) public { address[] memory markets = new address[](1); markets[0] = _cTokenAddr; ComptrollerInterface(COMPTROLLER_ADDR).enterMarkets(markets); } /// @notice Exits the cream market so it can't be deposited/borrowed /// @param _cTokenAddr CToken address of the token function exitMarket(address _cTokenAddr) public { ComptrollerInterface(COMPTROLLER_ADDR).exitMarket(_cTokenAddr); } /// @notice Approves CToken contract to pull underlying tokens from the DSProxy /// @param _tokenAddr Token we are trying to approve /// @param _cTokenAddr Address which will gain the approval function approveToken(address _tokenAddr, address _cTokenAddr) internal { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeApprove(_cTokenAddr, uint(-1)); } } } contract CreamLoanInfo is CreamSafetyRatio { struct LoanData { address user; uint128 ratio; address[] collAddr; address[] borrowAddr; uint[] collAmounts; uint[] borrowAmounts; } struct TokenInfo { address cTokenAddress; address underlyingTokenAddress; uint collateralFactor; uint price; } struct TokenInfoFull { address underlyingTokenAddress; uint supplyRate; uint borrowRate; uint exchangeRate; uint marketLiquidity; uint totalSupply; uint totalBorrow; uint collateralFactor; uint price; } address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant CETH_ADDRESS = 0xD06527D5e56A3495252A528C4987003b712860eE; /// @notice Calcualted the ratio of coll/debt for a cream user /// @param _user Address of the user function getRatio(address _user) public view returns (uint) { // For each asset the account is in return getSafetyRatio(_user); } /// @notice Fetches cream prices for tokens /// @param _cTokens Arr. of cTokens for which to get the prices /// @return prices Array of prices function getPrices(address[] memory _cTokens) public view returns (uint[] memory prices) { prices = new uint[](_cTokens.length); address oracleAddr = comp.oracle(); for (uint i = 0; i < _cTokens.length; ++i) { prices[i] = CompoundOracleInterface(oracleAddr).getUnderlyingPrice(_cTokens[i]); } } /// @notice Fetches cream collateral factors for tokens /// @param _cTokens Arr. of cTokens for which to get the coll. factors /// @return collFactors Array of coll. factors function getCollFactors(address[] memory _cTokens) public view returns (uint[] memory collFactors) { collFactors = new uint[](_cTokens.length); for (uint i = 0; i < _cTokens.length; ++i) { (, collFactors[i]) = comp.markets(_cTokens[i]); } } /// @notice Fetches all the collateral/debt address and amounts, denominated in eth /// @param _user Address of the user /// @return data LoanData information function getLoanData(address _user) public view returns (LoanData memory data) { address[] memory assets = comp.getAssetsIn(_user); address oracleAddr = comp.oracle(); data = LoanData({ user: _user, ratio: 0, collAddr: new address[](assets.length), borrowAddr: new address[](assets.length), collAmounts: new uint[](assets.length), borrowAmounts: new uint[](assets.length) }); uint collPos = 0; uint borrowPos = 0; for (uint i = 0; i < assets.length; i++) { address asset = assets[i]; (, uint cTokenBalance, uint borrowBalance, uint exchangeRateMantissa) = CTokenInterface(asset).getAccountSnapshot(_user); Exp memory oraclePrice; if (cTokenBalance != 0 || borrowBalance != 0) { oraclePrice = Exp({mantissa: CompoundOracleInterface(oracleAddr).getUnderlyingPrice(asset)}); } // Sum up collateral in eth if (cTokenBalance != 0) { Exp memory exchangeRate = Exp({mantissa: exchangeRateMantissa}); (, Exp memory tokensToEth) = mulExp(exchangeRate, oraclePrice); data.collAddr[collPos] = asset; (, data.collAmounts[collPos]) = mulScalarTruncate(tokensToEth, cTokenBalance); collPos++; } // Sum up debt in eth if (borrowBalance != 0) { data.borrowAddr[borrowPos] = asset; (, data.borrowAmounts[borrowPos]) = mulScalarTruncate(oraclePrice, borrowBalance); borrowPos++; } } data.ratio = uint128(getSafetyRatio(_user)); return data; } function getTokenBalances(address _user, address[] memory _cTokens) public view returns (uint[] memory balances, uint[] memory borrows) { balances = new uint[](_cTokens.length); borrows = new uint[](_cTokens.length); for (uint i = 0; i < _cTokens.length; i++) { address asset = _cTokens[i]; (, uint cTokenBalance, uint borrowBalance, uint exchangeRateMantissa) = CTokenInterface(asset).getAccountSnapshot(_user); Exp memory exchangeRate = Exp({mantissa: exchangeRateMantissa}); (, balances[i]) = mulScalarTruncate(exchangeRate, cTokenBalance); borrows[i] = borrowBalance; } } /// @notice Fetches all the collateral/debt address and amounts, denominated in eth /// @param _users Addresses of the user /// @return loans Array of LoanData information function getLoanDataArr(address[] memory _users) public view returns (LoanData[] memory loans) { loans = new LoanData[](_users.length); for (uint i = 0; i < _users.length; ++i) { loans[i] = getLoanData(_users[i]); } } /// @notice Calcualted the ratio of coll/debt for a cream user /// @param _users Addresses of the user /// @return ratios Array of ratios function getRatios(address[] memory _users) public view returns (uint[] memory ratios) { ratios = new uint[](_users.length); for (uint i = 0; i < _users.length; ++i) { ratios[i] = getSafetyRatio(_users[i]); } } /// @notice Information about cTokens /// @param _cTokenAddresses Array of cTokens addresses /// @return tokens Array of cTokens infomartion function getTokensInfo(address[] memory _cTokenAddresses) public returns(TokenInfo[] memory tokens) { tokens = new TokenInfo[](_cTokenAddresses.length); address oracleAddr = comp.oracle(); for (uint i = 0; i < _cTokenAddresses.length; ++i) { (, uint collFactor) = comp.markets(_cTokenAddresses[i]); tokens[i] = TokenInfo({ cTokenAddress: _cTokenAddresses[i], underlyingTokenAddress: getUnderlyingAddr(_cTokenAddresses[i]), collateralFactor: collFactor, price: CompoundOracleInterface(oracleAddr).getUnderlyingPrice(_cTokenAddresses[i]) }); } } /// @notice Information about cTokens /// @param _cTokenAddresses Array of cTokens addresses /// @return tokens Array of cTokens infomartion function getFullTokensInfo(address[] memory _cTokenAddresses) public returns(TokenInfoFull[] memory tokens) { tokens = new TokenInfoFull[](_cTokenAddresses.length); address oracleAddr = comp.oracle(); for (uint i = 0; i < _cTokenAddresses.length; ++i) { (, uint collFactor) = comp.markets(_cTokenAddresses[i]); CTokenInterface cToken = CTokenInterface(_cTokenAddresses[i]); tokens[i] = TokenInfoFull({ underlyingTokenAddress: getUnderlyingAddr(_cTokenAddresses[i]), supplyRate: cToken.supplyRatePerBlock(), borrowRate: cToken.borrowRatePerBlock(), exchangeRate: cToken.exchangeRateCurrent(), marketLiquidity: cToken.getCash(), totalSupply: cToken.totalSupply(), totalBorrow: cToken.totalBorrowsCurrent(), collateralFactor: collFactor, price: CompoundOracleInterface(oracleAddr).getUnderlyingPrice(_cTokenAddresses[i]) }); } } /// @notice Returns the underlying address of the cToken asset /// @param _cTokenAddress cToken address /// @return Token address of the cToken specified function getUnderlyingAddr(address _cTokenAddress) internal returns (address) { if (_cTokenAddress == CETH_ADDRESS) { return ETH_ADDRESS; } else { return CTokenInterface(_cTokenAddress).underlying(); } } } contract CreamImportFlashLoan is FlashLoanReceiverBase { using SafeERC20 for ERC20; ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); address public constant CREAM_BORROW_PROXY = 0x87F198Ef6116CdBC5f36B581d212ad950b7e2Ddd; address public owner; constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public { owner = msg.sender; } /// @notice Called by Aave when sending back the FL amount /// @param _reserve The address of the borrowed token /// @param _amount Amount of FL tokens received /// @param _fee FL Aave fee /// @param _params The params that are sent from the original FL caller contract function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { ( address cCollateralToken, address cBorrowToken, address user, address proxy ) = abi.decode(_params, (address,address,address,address)); // approve FL tokens so we can repay them ERC20(_reserve).safeApprove(cBorrowToken, uint(-1)); // repay cream debt require(CTokenInterface(cBorrowToken).repayBorrowBehalf(user, uint(-1)) == 0, "Repay borrow behalf fail"); // transfer cTokens to proxy uint cTokenBalance = CTokenInterface(cCollateralToken).balanceOf(user); require(CTokenInterface(cCollateralToken).transferFrom(user, proxy, cTokenBalance)); // borrow bytes memory proxyData = getProxyData(cCollateralToken, cBorrowToken, _reserve, (_amount + _fee)); DSProxyInterface(proxy).execute(CREAM_BORROW_PROXY, proxyData); // Repay the loan with the money DSProxy sent back transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); } /// @notice Formats function data call so we can call it through DSProxy /// @param _cCollToken CToken address of collateral /// @param _cBorrowToken CToken address we will borrow /// @param _borrowToken Token address we will borrow /// @param _amount Amount that will be borrowed /// @return proxyData Formated function call data function getProxyData(address _cCollToken, address _cBorrowToken, address _borrowToken, uint _amount) internal pure returns (bytes memory proxyData) { proxyData = abi.encodeWithSignature( "borrow(address,address,address,uint256)", _cCollToken, _cBorrowToken, _borrowToken, _amount); } function withdrawStuckFunds(address _tokenAddr, uint _amount) public { require(owner == msg.sender, "Must be owner"); if (_tokenAddr == 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE) { msg.sender.transfer(_amount); } else { ERC20(_tokenAddr).safeTransfer(owner, _amount); } } } contract CreamImportTaker is CreamSaverHelper, ProxyPermission, GasBurner { ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); address payable public constant CREAM_IMPORT_FLASH_LOAN = 0x24F4aC0Fe758c45cf8425D8Fbdd608cca9A7dBf8; address public constant PROXY_REGISTRY_ADDRESS = 0x4678f0a6958e4D2Bc4F1BAF7Bc52E8F3564f3fE4; DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); /// @notice Starts the process to move users position 1 collateral and 1 borrow /// @dev User must approve cream_IMPORT_FLASH_LOAN to pull _cCollateralToken /// @param _cCollateralToken Collateral we are moving to DSProxy /// @param _cBorrowToken Borrow token we are moving to DSProxy function importLoan(address _cCollateralToken, address _cBorrowToken) external burnGas(20) { address proxy = getProxy(); uint loanAmount = CTokenInterface(_cBorrowToken).borrowBalanceCurrent(msg.sender); bytes memory paramsData = abi.encode(_cCollateralToken, _cBorrowToken, msg.sender, proxy); givePermission(CREAM_IMPORT_FLASH_LOAN); lendingPool.flashLoan(CREAM_IMPORT_FLASH_LOAN, getUnderlyingAddr(_cBorrowToken), loanAmount, paramsData); removePermission(CREAM_IMPORT_FLASH_LOAN); logger.Log(address(this), msg.sender, "CreamImport", abi.encode(loanAmount, 0, _cCollateralToken)); } /// @notice Gets proxy address, if user doesn't has DSProxy build it /// @return proxy DsProxy address function getProxy() internal returns (address proxy) { proxy = ProxyRegistryInterface(PROXY_REGISTRY_ADDRESS).proxies(msg.sender); if (proxy == address(0)) { proxy = ProxyRegistryInterface(PROXY_REGISTRY_ADDRESS).build(msg.sender); } } } contract SaverExchangeCore is SaverExchangeHelper, DSMath { // first is empty to keep the legacy order in place enum ExchangeType { _, OASIS, KYBER, UNISWAP, ZEROX } enum ActionType { SELL, BUY } struct ExchangeData { address srcAddr; address destAddr; uint srcAmount; uint destAmount; uint minPrice; address wrapper; address exchangeAddr; bytes callData; uint256 price0x; } /// @notice Internal method that preforms a sell on 0x/on-chain /// @dev Usefull for other DFS contract to integrate for exchanging /// @param exData Exchange data struct /// @return (address, uint) Address of the wrapper used and destAmount function _sell(ExchangeData memory exData) internal returns (address, uint) { address wrapper; uint swapedTokens; bool success; uint tokensLeft = exData.srcAmount; // if selling eth, convert to weth if (exData.srcAddr == KYBER_ETH_ADDRESS) { exData.srcAddr = ethToWethAddr(exData.srcAddr); TokenInterface(WETH_ADDRESS).deposit.value(exData.srcAmount)(); } // Try 0x first and then fallback on specific wrapper if (exData.price0x > 0) { approve0xProxy(exData.srcAddr, exData.srcAmount); uint ethAmount = getProtocolFee(exData.srcAddr, exData.srcAmount); (success, swapedTokens, tokensLeft) = takeOrder(exData, ethAmount, ActionType.SELL); if (success) { wrapper = exData.exchangeAddr; } } // fallback to desired wrapper if 0x failed if (!success) { swapedTokens = saverSwap(exData, ActionType.SELL); wrapper = exData.wrapper; } require(getBalance(exData.destAddr) >= wmul(exData.minPrice, exData.srcAmount), "Final amount isn't correct"); // if anything is left in weth, pull it to user as eth if (getBalance(WETH_ADDRESS) > 0) { TokenInterface(WETH_ADDRESS).withdraw( TokenInterface(WETH_ADDRESS).balanceOf(address(this)) ); } return (wrapper, swapedTokens); } /// @notice Internal method that preforms a buy on 0x/on-chain /// @dev Usefull for other DFS contract to integrate for exchanging /// @param exData Exchange data struct /// @return (address, uint) Address of the wrapper used and srcAmount function _buy(ExchangeData memory exData) internal returns (address, uint) { address wrapper; uint swapedTokens; bool success; require(exData.destAmount != 0, "Dest amount must be specified"); // if selling eth, convert to weth if (exData.srcAddr == KYBER_ETH_ADDRESS) { exData.srcAddr = ethToWethAddr(exData.srcAddr); TokenInterface(WETH_ADDRESS).deposit.value(exData.srcAmount)(); } if (exData.price0x > 0) { approve0xProxy(exData.srcAddr, exData.srcAmount); uint ethAmount = getProtocolFee(exData.srcAddr, exData.srcAmount); (success, swapedTokens,) = takeOrder(exData, ethAmount, ActionType.BUY); if (success) { wrapper = exData.exchangeAddr; } } // fallback to desired wrapper if 0x failed if (!success) { swapedTokens = saverSwap(exData, ActionType.BUY); wrapper = exData.wrapper; } require(getBalance(exData.destAddr) >= exData.destAmount, "Final amount isn't correct"); // if anything is left in weth, pull it to user as eth if (getBalance(WETH_ADDRESS) > 0) { TokenInterface(WETH_ADDRESS).withdraw( TokenInterface(WETH_ADDRESS).balanceOf(address(this)) ); } return (wrapper, getBalance(exData.destAddr)); } /// @notice Takes order from 0x and returns bool indicating if it is successful /// @param _exData Exchange data /// @param _ethAmount Ether fee needed for 0x order function takeOrder( ExchangeData memory _exData, uint256 _ethAmount, ActionType _type ) private returns (bool success, uint256, uint256) { // write in the exact amount we are selling/buing in an order if (_type == ActionType.SELL) { writeUint256(_exData.callData, 36, _exData.srcAmount); } else { writeUint256(_exData.callData, 36, _exData.destAmount); } if (ZrxAllowlist(ZRX_ALLOWLIST_ADDR).isNonPayableAddr(_exData.exchangeAddr)) { _ethAmount = 0; } uint256 tokensBefore = getBalance(_exData.destAddr); if (ZrxAllowlist(ZRX_ALLOWLIST_ADDR).isZrxAddr(_exData.exchangeAddr)) { (success, ) = _exData.exchangeAddr.call{value: _ethAmount}(_exData.callData); } else { success = false; } uint256 tokensSwaped = 0; uint256 tokensLeft = _exData.srcAmount; if (success) { // check to see if any _src tokens are left over after exchange tokensLeft = getBalance(_exData.srcAddr); // convert weth -> eth if needed if (_exData.destAddr == KYBER_ETH_ADDRESS) { TokenInterface(WETH_ADDRESS).withdraw( TokenInterface(WETH_ADDRESS).balanceOf(address(this)) ); } // get the current balance of the swaped tokens tokensSwaped = getBalance(_exData.destAddr) - tokensBefore; } return (success, tokensSwaped, tokensLeft); } /// @notice Calls wraper contract for exchage to preform an on-chain swap /// @param _exData Exchange data struct /// @param _type Type of action SELL|BUY /// @return swapedTokens For Sell that the destAmount, for Buy thats the srcAmount function saverSwap(ExchangeData memory _exData, ActionType _type) internal returns (uint swapedTokens) { require(SaverExchangeRegistry(SAVER_EXCHANGE_REGISTRY).isWrapper(_exData.wrapper), "Wrapper is not valid"); uint ethValue = 0; ERC20(_exData.srcAddr).safeTransfer(_exData.wrapper, _exData.srcAmount); if (_type == ActionType.SELL) { swapedTokens = ExchangeInterfaceV2(_exData.wrapper). sell{value: ethValue}(_exData.srcAddr, _exData.destAddr, _exData.srcAmount); } else { swapedTokens = ExchangeInterfaceV2(_exData.wrapper). buy{value: ethValue}(_exData.srcAddr, _exData.destAddr, _exData.destAmount); } } function writeUint256(bytes memory _b, uint256 _index, uint _input) internal pure { if (_b.length < _index + 32) { revert("Incorrent lengt while writting bytes32"); } bytes32 input = bytes32(_input); _index += 32; // Read the bytes32 from array memory assembly { mstore(add(_b, _index), input) } } /// @notice Converts Kybers Eth address -> Weth /// @param _src Input address function ethToWethAddr(address _src) internal pure returns (address) { return _src == KYBER_ETH_ADDRESS ? WETH_ADDRESS : _src; } /// @notice Calculates protocol fee /// @param _srcAddr selling token address (if eth should be WETH) /// @param _srcAmount amount we are selling function getProtocolFee(address _srcAddr, uint256 _srcAmount) internal view returns(uint256) { // if we are not selling ETH msg value is always the protocol fee if (_srcAddr != WETH_ADDRESS) return address(this).balance; // if msg value is larger than srcAmount, that means that msg value is protocol fee + srcAmount, so we subsctract srcAmount from msg value // we have an edge case here when protocol fee is higher than selling amount if (address(this).balance > _srcAmount) return address(this).balance - _srcAmount; // if msg value is lower than src amount, that means that srcAmount isn't included in msg value, so we return msg value return address(this).balance; } function packExchangeData(ExchangeData memory _exData) public pure returns(bytes memory) { // splitting in two different bytes and encoding all because of stack too deep in decoding part bytes memory part1 = abi.encode( _exData.srcAddr, _exData.destAddr, _exData.srcAmount, _exData.destAmount ); bytes memory part2 = abi.encode( _exData.minPrice, _exData.wrapper, _exData.exchangeAddr, _exData.callData, _exData.price0x ); return abi.encode(part1, part2); } function unpackExchangeData(bytes memory _data) public pure returns(ExchangeData memory _exData) { ( bytes memory part1, bytes memory part2 ) = abi.decode(_data, (bytes,bytes)); ( _exData.srcAddr, _exData.destAddr, _exData.srcAmount, _exData.destAmount ) = abi.decode(part1, (address,address,uint256,uint256)); ( _exData.minPrice, _exData.wrapper, _exData.exchangeAddr, _exData.callData, _exData.price0x ) = abi.decode(part2, (uint256,address,address,bytes,uint256)); } // solhint-disable-next-line no-empty-blocks receive() external virtual payable {} } contract KyberWrapper is DSMath, ExchangeInterfaceV2, AdminAuth { address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant KYBER_INTERFACE = 0x9AAb3f75489902f3a48495025729a0AF77d4b11e; address payable public constant WALLET_ID = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; using SafeERC20 for ERC20; /// @notice Sells a _srcAmount of tokens at Kyber /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Destination amount function sell(address _srcAddr, address _destAddr, uint _srcAmount) external override payable returns (uint) { ERC20 srcToken = ERC20(_srcAddr); ERC20 destToken = ERC20(_destAddr); KyberNetworkProxyInterface kyberNetworkProxy = KyberNetworkProxyInterface(KYBER_INTERFACE); if (_srcAddr != KYBER_ETH_ADDRESS) { srcToken.safeApprove(address(kyberNetworkProxy), _srcAmount); } uint destAmount = kyberNetworkProxy.trade{value: msg.value}( srcToken, _srcAmount, destToken, msg.sender, uint(-1), 0, WALLET_ID ); return destAmount; } /// @notice Buys a _destAmount of tokens at Kyber /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint srcAmount function buy(address _srcAddr, address _destAddr, uint _destAmount) external override payable returns(uint) { ERC20 srcToken = ERC20(_srcAddr); ERC20 destToken = ERC20(_destAddr); uint srcAmount = 0; if (_srcAddr != KYBER_ETH_ADDRESS) { srcAmount = srcToken.balanceOf(address(this)); } else { srcAmount = msg.value; } KyberNetworkProxyInterface kyberNetworkProxy = KyberNetworkProxyInterface(KYBER_INTERFACE); if (_srcAddr != KYBER_ETH_ADDRESS) { srcToken.safeApprove(address(kyberNetworkProxy), srcAmount); } uint destAmount = kyberNetworkProxy.trade{value: msg.value}( srcToken, srcAmount, destToken, msg.sender, _destAmount, 0, WALLET_ID ); require(destAmount == _destAmount, "Wrong dest amount"); uint srcAmountAfter = 0; if (_srcAddr != KYBER_ETH_ADDRESS) { srcAmountAfter = srcToken.balanceOf(address(this)); } else { srcAmountAfter = address(this).balance; } // Send the leftover from the source token back sendLeftOver(_srcAddr); return (srcAmount - srcAmountAfter); } /// @notice Return a rate for which we can sell an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return rate Rate function getSellRate(address _srcAddr, address _destAddr, uint _srcAmount) public override view returns (uint rate) { (rate, ) = KyberNetworkProxyInterface(KYBER_INTERFACE) .getExpectedRate(ERC20(_srcAddr), ERC20(_destAddr), _srcAmount); // multiply with decimal difference in src token rate = rate * (10**(18 - getDecimals(_srcAddr))); // divide with decimal difference in dest token rate = rate / (10**(18 - getDecimals(_destAddr))); } /// @notice Return a rate for which we can buy an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return rate Rate function getBuyRate(address _srcAddr, address _destAddr, uint _destAmount) public override view returns (uint rate) { uint256 srcRate = getSellRate(_destAddr, _srcAddr, _destAmount); uint256 srcAmount = wmul(srcRate, _destAmount); rate = getSellRate(_srcAddr, _destAddr, srcAmount); // increase rate by 3% too account for inaccuracy between sell/buy conversion rate = rate + (rate / 30); } /// @notice Send any leftover tokens, we use to clear out srcTokens after buy /// @param _srcAddr Source token address function sendLeftOver(address _srcAddr) internal { msg.sender.transfer(address(this).balance); if (_srcAddr != KYBER_ETH_ADDRESS) { ERC20(_srcAddr).safeTransfer(msg.sender, ERC20(_srcAddr).balanceOf(address(this))); } } receive() payable external {} function getDecimals(address _token) internal view returns (uint256) { if (_token == KYBER_ETH_ADDRESS) return 18; return ERC20(_token).decimals(); } } contract OasisTradeWrapper is DSMath, ExchangeInterfaceV2, AdminAuth { using SafeERC20 for ERC20; address public constant OTC_ADDRESS = 0x794e6e91555438aFc3ccF1c5076A74F42133d08D; address public constant WETH_ADDRESS = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; /// @notice Sells a _srcAmount of tokens at Oasis /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Destination amount function sell(address _srcAddr, address _destAddr, uint _srcAmount) external override payable returns (uint) { address srcAddr = ethToWethAddr(_srcAddr); address destAddr = ethToWethAddr(_destAddr); ERC20(srcAddr).safeApprove(OTC_ADDRESS, _srcAmount); uint destAmount = OasisInterface(OTC_ADDRESS).sellAllAmount(srcAddr, _srcAmount, destAddr, 0); // convert weth -> eth and send back if (destAddr == WETH_ADDRESS) { TokenInterface(WETH_ADDRESS).withdraw(destAmount); msg.sender.transfer(destAmount); } else { ERC20(destAddr).safeTransfer(msg.sender, destAmount); } return destAmount; } /// @notice Buys a _destAmount of tokens at Oasis /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint srcAmount function buy(address _srcAddr, address _destAddr, uint _destAmount) external override payable returns(uint) { address srcAddr = ethToWethAddr(_srcAddr); address destAddr = ethToWethAddr(_destAddr); ERC20(srcAddr).safeApprove(OTC_ADDRESS, uint(-1)); uint srcAmount = OasisInterface(OTC_ADDRESS).buyAllAmount(destAddr, _destAmount, srcAddr, uint(-1)); // convert weth -> eth and send back if (destAddr == WETH_ADDRESS) { TokenInterface(WETH_ADDRESS).withdraw(_destAmount); msg.sender.transfer(_destAmount); } else { ERC20(destAddr).safeTransfer(msg.sender, _destAmount); } // Send the leftover from the source token back sendLeftOver(srcAddr); return srcAmount; } /// @notice Return a rate for which we can sell an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Rate function getSellRate(address _srcAddr, address _destAddr, uint _srcAmount) public override view returns (uint) { address srcAddr = ethToWethAddr(_srcAddr); address destAddr = ethToWethAddr(_destAddr); return wdiv(OasisInterface(OTC_ADDRESS).getBuyAmount(destAddr, srcAddr, _srcAmount), _srcAmount); } /// @notice Return a rate for which we can buy an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint Rate function getBuyRate(address _srcAddr, address _destAddr, uint _destAmount) public override view returns (uint) { address srcAddr = ethToWethAddr(_srcAddr); address destAddr = ethToWethAddr(_destAddr); return wdiv(1 ether, wdiv(OasisInterface(OTC_ADDRESS).getPayAmount(srcAddr, destAddr, _destAmount), _destAmount)); } /// @notice Send any leftover tokens, we use to clear out srcTokens after buy /// @param _srcAddr Source token address function sendLeftOver(address _srcAddr) internal { msg.sender.transfer(address(this).balance); if (_srcAddr != KYBER_ETH_ADDRESS) { ERC20(_srcAddr).safeTransfer(msg.sender, ERC20(_srcAddr).balanceOf(address(this))); } } /// @notice Converts Kybers Eth address -> Weth /// @param _src Input address function ethToWethAddr(address _src) internal pure returns (address) { return _src == KYBER_ETH_ADDRESS ? WETH_ADDRESS : _src; } receive() payable external {} } contract UniswapV2Wrapper is DSMath, ExchangeInterfaceV2, AdminAuth { address public constant WETH_ADDRESS = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; UniswapRouterInterface public constant router = UniswapRouterInterface(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D); using SafeERC20 for ERC20; /// @notice Sells a _srcAmount of tokens at UniswapV2 /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Destination amount function sell(address _srcAddr, address _destAddr, uint _srcAmount) external payable override returns (uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); uint[] memory amounts; address[] memory path = new address[](2); path[0] = _srcAddr; path[1] = _destAddr; ERC20(_srcAddr).safeApprove(address(router), _srcAmount); // if we are buying ether if (_destAddr == WETH_ADDRESS) { amounts = router.swapExactTokensForETH(_srcAmount, 1, path, msg.sender, block.timestamp + 1); } // if we are selling token to token else { amounts = router.swapExactTokensForTokens(_srcAmount, 1, path, msg.sender, block.timestamp + 1); } return amounts[amounts.length - 1]; } /// @notice Buys a _destAmount of tokens at UniswapV2 /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint srcAmount function buy(address _srcAddr, address _destAddr, uint _destAmount) external override payable returns(uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); uint[] memory amounts; address[] memory path = new address[](2); path[0] = _srcAddr; path[1] = _destAddr; ERC20(_srcAddr).safeApprove(address(router), uint(-1)); // if we are buying ether if (_destAddr == WETH_ADDRESS) { amounts = router.swapTokensForExactETH(_destAmount, uint(-1), path, msg.sender, block.timestamp + 1); } // if we are buying token to token else { amounts = router.swapTokensForExactTokens(_destAmount, uint(-1), path, msg.sender, block.timestamp + 1); } // Send the leftover from the source token back sendLeftOver(_srcAddr); return amounts[0]; } /// @notice Return a rate for which we can sell an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Rate function getSellRate(address _srcAddr, address _destAddr, uint _srcAmount) public override view returns (uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); address[] memory path = new address[](2); path[0] = _srcAddr; path[1] = _destAddr; uint[] memory amounts = router.getAmountsOut(_srcAmount, path); return wdiv(amounts[amounts.length - 1], _srcAmount); } /// @notice Return a rate for which we can buy an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint Rate function getBuyRate(address _srcAddr, address _destAddr, uint _destAmount) public override view returns (uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); address[] memory path = new address[](2); path[0] = _srcAddr; path[1] = _destAddr; uint[] memory amounts = router.getAmountsIn(_destAmount, path); return wdiv(_destAmount, amounts[0]); } /// @notice Send any leftover tokens, we use to clear out srcTokens after buy /// @param _srcAddr Source token address function sendLeftOver(address _srcAddr) internal { msg.sender.transfer(address(this).balance); if (_srcAddr != KYBER_ETH_ADDRESS) { ERC20(_srcAddr).safeTransfer(msg.sender, ERC20(_srcAddr).balanceOf(address(this))); } } /// @notice Converts Kybers Eth address -> Weth /// @param _src Input address function ethToWethAddr(address _src) internal pure returns (address) { return _src == KYBER_ETH_ADDRESS ? WETH_ADDRESS : _src; } function getDecimals(address _token) internal view returns (uint256) { if (_token == KYBER_ETH_ADDRESS) return 18; return ERC20(_token).decimals(); } receive() payable external {} } contract UniswapWrapper is DSMath, ExchangeInterfaceV2, AdminAuth { address public constant WETH_ADDRESS = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant UNISWAP_FACTORY = 0xc0a47dFe034B400B47bDaD5FecDa2621de6c4d95; using SafeERC20 for ERC20; /// @notice Sells a _srcAmount of tokens at Uniswap /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Destination amount function sell(address _srcAddr, address _destAddr, uint _srcAmount) external payable override returns (uint) { address uniswapExchangeAddr; uint destAmount; _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); // if we are buying ether if (_destAddr == WETH_ADDRESS) { uniswapExchangeAddr = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr); ERC20(_srcAddr).safeApprove(uniswapExchangeAddr, _srcAmount); destAmount = UniswapExchangeInterface(uniswapExchangeAddr). tokenToEthTransferInput(_srcAmount, 1, block.timestamp + 1, msg.sender); } // if we are selling token to token else { uniswapExchangeAddr = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr); ERC20(_srcAddr).safeApprove(uniswapExchangeAddr, _srcAmount); destAmount = UniswapExchangeInterface(uniswapExchangeAddr). tokenToTokenTransferInput(_srcAmount, 1, 1, block.timestamp + 1, msg.sender, _destAddr); } return destAmount; } /// @notice Buys a _destAmount of tokens at Uniswap /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint srcAmount function buy(address _srcAddr, address _destAddr, uint _destAmount) external override payable returns(uint) { address uniswapExchangeAddr; uint srcAmount; _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); // if we are buying ether if (_destAddr == WETH_ADDRESS) { uniswapExchangeAddr = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr); ERC20(_srcAddr).safeApprove(uniswapExchangeAddr, uint(-1)); srcAmount = UniswapExchangeInterface(uniswapExchangeAddr). tokenToEthTransferOutput(_destAmount, uint(-1), block.timestamp + 1, msg.sender); } // if we are buying token to token else { uniswapExchangeAddr = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr); ERC20(_srcAddr).safeApprove(uniswapExchangeAddr, uint(-1)); srcAmount = UniswapExchangeInterface(uniswapExchangeAddr). tokenToTokenTransferOutput(_destAmount, uint(-1), uint(-1), block.timestamp + 1, msg.sender, _destAddr); } // Send the leftover from the source token back sendLeftOver(_srcAddr); return srcAmount; } /// @notice Return a rate for which we can sell an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Rate function getSellRate(address _srcAddr, address _destAddr, uint _srcAmount) public override view returns (uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); if(_srcAddr == WETH_ADDRESS) { address uniswapTokenAddress = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_destAddr); return wdiv(UniswapExchangeInterface(uniswapTokenAddress).getEthToTokenInputPrice(_srcAmount), _srcAmount); } else if (_destAddr == WETH_ADDRESS) { address uniswapTokenAddress = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr); return wdiv(UniswapExchangeInterface(uniswapTokenAddress).getTokenToEthInputPrice(_srcAmount), _srcAmount); } else { uint ethBought = UniswapExchangeInterface(UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr)).getTokenToEthInputPrice(_srcAmount); return wdiv(UniswapExchangeInterface(UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_destAddr)).getEthToTokenInputPrice(ethBought), _srcAmount); } } /// @notice Return a rate for which we can buy an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint Rate function getBuyRate(address _srcAddr, address _destAddr, uint _destAmount) public override view returns (uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); if(_srcAddr == WETH_ADDRESS) { address uniswapTokenAddress = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_destAddr); return wdiv(1 ether, wdiv(UniswapExchangeInterface(uniswapTokenAddress).getEthToTokenOutputPrice(_destAmount), _destAmount)); } else if (_destAddr == WETH_ADDRESS) { address uniswapTokenAddress = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr); return wdiv(1 ether, wdiv(UniswapExchangeInterface(uniswapTokenAddress).getTokenToEthOutputPrice(_destAmount), _destAmount)); } else { uint ethNeeded = UniswapExchangeInterface(UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_destAddr)).getTokenToEthOutputPrice(_destAmount); return wdiv(1 ether, wdiv(UniswapExchangeInterface(UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr)).getEthToTokenOutputPrice(ethNeeded), _destAmount)); } } /// @notice Send any leftover tokens, we use to clear out srcTokens after buy /// @param _srcAddr Source token address function sendLeftOver(address _srcAddr) internal { msg.sender.transfer(address(this).balance); if (_srcAddr != KYBER_ETH_ADDRESS) { ERC20(_srcAddr).safeTransfer(msg.sender, ERC20(_srcAddr).balanceOf(address(this))); } } /// @notice Converts Kybers Eth address -> Weth /// @param _src Input address function ethToWethAddr(address _src) internal pure returns (address) { return _src == KYBER_ETH_ADDRESS ? WETH_ADDRESS : _src; } receive() payable external {} } contract DFSExchangeCore is DFSExchangeHelper, DSMath, DFSExchangeData { string public constant ERR_SLIPPAGE_HIT = "Slippage hit"; string public constant ERR_DEST_AMOUNT_MISSING = "Dest amount missing"; string public constant ERR_WRAPPER_INVALID = "Wrapper invalid"; string public constant ERR_OFFCHAIN_DATA_INVALID = "Offchain data invalid"; /// @notice Internal method that preforms a sell on 0x/on-chain /// @dev Usefull for other DFS contract to integrate for exchanging /// @param exData Exchange data struct /// @return (address, uint) Address of the wrapper used and destAmount function _sell(ExchangeData memory exData) internal returns (address, uint) { address wrapper; uint swapedTokens; bool success; // if selling eth, convert to weth if (exData.srcAddr == KYBER_ETH_ADDRESS) { exData.srcAddr = ethToWethAddr(exData.srcAddr); TokenInterface(WETH_ADDRESS).deposit.value(exData.srcAmount)(); } exData.srcAmount -= getFee(exData.srcAmount, exData.user, exData.srcAddr, exData.dfsFeeDivider); // Try 0x first and then fallback on specific wrapper if (exData.offchainData.price > 0) { (success, swapedTokens) = takeOrder(exData, ActionType.SELL); if (success) { wrapper = exData.offchainData.exchangeAddr; } } // fallback to desired wrapper if 0x failed if (!success) { swapedTokens = saverSwap(exData, ActionType.SELL); wrapper = exData.wrapper; } require(getBalance(exData.destAddr) >= wmul(exData.minPrice, exData.srcAmount), ERR_SLIPPAGE_HIT); // if anything is left in weth, pull it to user as eth if (getBalance(WETH_ADDRESS) > 0) { TokenInterface(WETH_ADDRESS).withdraw( TokenInterface(WETH_ADDRESS).balanceOf(address(this)) ); } return (wrapper, swapedTokens); } /// @notice Internal method that preforms a buy on 0x/on-chain /// @dev Usefull for other DFS contract to integrate for exchanging /// @param exData Exchange data struct /// @return (address, uint) Address of the wrapper used and srcAmount function _buy(ExchangeData memory exData) internal returns (address, uint) { address wrapper; uint swapedTokens; bool success; require(exData.destAmount != 0, ERR_DEST_AMOUNT_MISSING); // if selling eth, convert to weth if (exData.srcAddr == KYBER_ETH_ADDRESS) { exData.srcAddr = ethToWethAddr(exData.srcAddr); TokenInterface(WETH_ADDRESS).deposit.value(exData.srcAmount)(); } exData.srcAmount -= getFee(exData.srcAmount, exData.user, exData.srcAddr, exData.dfsFeeDivider); if (exData.offchainData.price > 0) { (success, swapedTokens) = takeOrder(exData, ActionType.BUY); if (success) { wrapper = exData.offchainData.exchangeAddr; } } // fallback to desired wrapper if 0x failed if (!success) { swapedTokens = saverSwap(exData, ActionType.BUY); wrapper = exData.wrapper; } require(getBalance(exData.destAddr) >= exData.destAmount, ERR_SLIPPAGE_HIT); // if anything is left in weth, pull it to user as eth if (getBalance(WETH_ADDRESS) > 0) { TokenInterface(WETH_ADDRESS).withdraw( TokenInterface(WETH_ADDRESS).balanceOf(address(this)) ); } return (wrapper, getBalance(exData.destAddr)); } /// @notice Takes order from 0x and returns bool indicating if it is successful /// @param _exData Exchange data function takeOrder( ExchangeData memory _exData, ActionType _type ) private returns (bool success, uint256) { if (_exData.srcAddr != KYBER_ETH_ADDRESS) { ERC20(_exData.srcAddr).safeApprove(_exData.offchainData.allowanceTarget, _exData.srcAmount); } // write in the exact amount we are selling/buing in an order if (_type == ActionType.SELL) { writeUint256(_exData.offchainData.callData, 36, _exData.srcAmount); } else { writeUint256(_exData.offchainData.callData, 36, _exData.destAmount); } uint256 tokensBefore = getBalance(_exData.destAddr); if (ZrxAllowlist(ZRX_ALLOWLIST_ADDR).isZrxAddr(_exData.offchainData.exchangeAddr)) { (success, ) = _exData.offchainData.exchangeAddr.call{value: _exData.offchainData.protocolFee}(_exData.offchainData.callData); } else { success = false; } uint256 tokensSwaped = 0; if (success) { // convert weth -> eth if needed if (_exData.destAddr == KYBER_ETH_ADDRESS) { TokenInterface(WETH_ADDRESS).withdraw( TokenInterface(WETH_ADDRESS).balanceOf(address(this)) ); } // get the current balance of the swaped tokens tokensSwaped = getBalance(_exData.destAddr) - tokensBefore; } return (success, tokensSwaped); } /// @notice Calls wraper contract for exchage to preform an on-chain swap /// @param _exData Exchange data struct /// @param _type Type of action SELL|BUY /// @return swapedTokens For Sell that the destAmount, for Buy thats the srcAmount function saverSwap(ExchangeData memory _exData, ActionType _type) internal returns (uint swapedTokens) { require(SaverExchangeRegistry(SAVER_EXCHANGE_REGISTRY).isWrapper(_exData.wrapper), ERR_WRAPPER_INVALID); ERC20(_exData.srcAddr).safeTransfer(_exData.wrapper, _exData.srcAmount); if (_type == ActionType.SELL) { swapedTokens = ExchangeInterfaceV3(_exData.wrapper). sell(_exData.srcAddr, _exData.destAddr, _exData.srcAmount, _exData.wrapperData); } else { swapedTokens = ExchangeInterfaceV3(_exData.wrapper). buy(_exData.srcAddr, _exData.destAddr, _exData.destAmount, _exData.wrapperData); } } function writeUint256(bytes memory _b, uint256 _index, uint _input) internal pure { if (_b.length < _index + 32) { revert(ERR_OFFCHAIN_DATA_INVALID); } bytes32 input = bytes32(_input); _index += 32; // Read the bytes32 from array memory assembly { mstore(add(_b, _index), input) } } /// @notice Converts Kybers Eth address -> Weth /// @param _src Input address function ethToWethAddr(address _src) internal pure returns (address) { return _src == KYBER_ETH_ADDRESS ? WETH_ADDRESS : _src; } // solhint-disable-next-line no-empty-blocks receive() external virtual payable {} } contract KyberWrapperV3 is DSMath, ExchangeInterfaceV3, AdminAuth { address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant KYBER_INTERFACE = 0x9AAb3f75489902f3a48495025729a0AF77d4b11e; address payable public constant WALLET_ID = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; using SafeERC20 for ERC20; /// @notice Sells a _srcAmount of tokens at Kyber /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Destination amount function sell(address _srcAddr, address _destAddr, uint _srcAmount, bytes memory _additionalData) external override payable returns (uint) { ERC20 srcToken = ERC20(_srcAddr); ERC20 destToken = ERC20(_destAddr); KyberNetworkProxyInterface kyberNetworkProxy = KyberNetworkProxyInterface(KYBER_INTERFACE); if (_srcAddr != KYBER_ETH_ADDRESS) { srcToken.safeApprove(address(kyberNetworkProxy), _srcAmount); } uint destAmount = kyberNetworkProxy.trade{value: msg.value}( srcToken, _srcAmount, destToken, msg.sender, uint(-1), 0, WALLET_ID ); return destAmount; } /// @notice Buys a _destAmount of tokens at Kyber /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint srcAmount function buy(address _srcAddr, address _destAddr, uint _destAmount, bytes memory _additionalData) external override payable returns(uint) { ERC20 srcToken = ERC20(_srcAddr); ERC20 destToken = ERC20(_destAddr); uint srcAmount = 0; if (_srcAddr != KYBER_ETH_ADDRESS) { srcAmount = srcToken.balanceOf(address(this)); } else { srcAmount = msg.value; } KyberNetworkProxyInterface kyberNetworkProxy = KyberNetworkProxyInterface(KYBER_INTERFACE); if (_srcAddr != KYBER_ETH_ADDRESS) { srcToken.safeApprove(address(kyberNetworkProxy), srcAmount); } uint destAmount = kyberNetworkProxy.trade{value: msg.value}( srcToken, srcAmount, destToken, msg.sender, _destAmount, 0, WALLET_ID ); require(destAmount == _destAmount, "Wrong dest amount"); uint srcAmountAfter = 0; if (_srcAddr != KYBER_ETH_ADDRESS) { srcAmountAfter = srcToken.balanceOf(address(this)); } else { srcAmountAfter = address(this).balance; } // Send the leftover from the source token back sendLeftOver(_srcAddr); return (srcAmount - srcAmountAfter); } /// @notice Return a rate for which we can sell an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return rate Rate function getSellRate(address _srcAddr, address _destAddr, uint _srcAmount, bytes memory _additionalData) public override view returns (uint rate) { (rate, ) = KyberNetworkProxyInterface(KYBER_INTERFACE) .getExpectedRate(ERC20(_srcAddr), ERC20(_destAddr), _srcAmount); // multiply with decimal difference in src token rate = rate * (10**(18 - getDecimals(_srcAddr))); // divide with decimal difference in dest token rate = rate / (10**(18 - getDecimals(_destAddr))); } /// @notice Return a rate for which we can buy an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return rate Rate function getBuyRate(address _srcAddr, address _destAddr, uint _destAmount, bytes memory _additionalData) public override view returns (uint rate) { uint256 srcRate = getSellRate(_destAddr, _srcAddr, _destAmount, _additionalData); uint256 srcAmount = wmul(srcRate, _destAmount); rate = getSellRate(_srcAddr, _destAddr, srcAmount, _additionalData); // increase rate by 3% too account for inaccuracy between sell/buy conversion rate = rate + (rate / 30); } /// @notice Send any leftover tokens, we use to clear out srcTokens after buy /// @param _srcAddr Source token address function sendLeftOver(address _srcAddr) internal { msg.sender.transfer(address(this).balance); if (_srcAddr != KYBER_ETH_ADDRESS) { ERC20(_srcAddr).safeTransfer(msg.sender, ERC20(_srcAddr).balanceOf(address(this))); } } receive() payable external {} function getDecimals(address _token) internal view returns (uint256) { if (_token == KYBER_ETH_ADDRESS) return 18; return ERC20(_token).decimals(); } } contract OasisTradeWrapperV3 is DSMath, ExchangeInterfaceV3, AdminAuth { using SafeERC20 for ERC20; address public constant OTC_ADDRESS = 0x794e6e91555438aFc3ccF1c5076A74F42133d08D; address public constant WETH_ADDRESS = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; /// @notice Sells a _srcAmount of tokens at Oasis /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Destination amount function sell(address _srcAddr, address _destAddr, uint _srcAmount, bytes memory _additionalData) external override payable returns (uint) { address srcAddr = ethToWethAddr(_srcAddr); address destAddr = ethToWethAddr(_destAddr); ERC20(srcAddr).safeApprove(OTC_ADDRESS, _srcAmount); uint destAmount = OasisInterface(OTC_ADDRESS).sellAllAmount(srcAddr, _srcAmount, destAddr, 0); // convert weth -> eth and send back if (destAddr == WETH_ADDRESS) { TokenInterface(WETH_ADDRESS).withdraw(destAmount); msg.sender.transfer(destAmount); } else { ERC20(destAddr).safeTransfer(msg.sender, destAmount); } return destAmount; } /// @notice Buys a _destAmount of tokens at Oasis /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint srcAmount function buy(address _srcAddr, address _destAddr, uint _destAmount, bytes memory _additionalData) external override payable returns(uint) { address srcAddr = ethToWethAddr(_srcAddr); address destAddr = ethToWethAddr(_destAddr); ERC20(srcAddr).safeApprove(OTC_ADDRESS, uint(-1)); uint srcAmount = OasisInterface(OTC_ADDRESS).buyAllAmount(destAddr, _destAmount, srcAddr, uint(-1)); // convert weth -> eth and send back if (destAddr == WETH_ADDRESS) { TokenInterface(WETH_ADDRESS).withdraw(_destAmount); msg.sender.transfer(_destAmount); } else { ERC20(destAddr).safeTransfer(msg.sender, _destAmount); } // Send the leftover from the source token back sendLeftOver(srcAddr); return srcAmount; } /// @notice Return a rate for which we can sell an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Rate function getSellRate(address _srcAddr, address _destAddr, uint _srcAmount, bytes memory _additionalData) public override view returns (uint) { address srcAddr = ethToWethAddr(_srcAddr); address destAddr = ethToWethAddr(_destAddr); return wdiv(OasisInterface(OTC_ADDRESS).getBuyAmount(destAddr, srcAddr, _srcAmount), _srcAmount); } /// @notice Return a rate for which we can buy an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint Rate function getBuyRate(address _srcAddr, address _destAddr, uint _destAmount, bytes memory _additionalData) public override view returns (uint) { address srcAddr = ethToWethAddr(_srcAddr); address destAddr = ethToWethAddr(_destAddr); return wdiv(1 ether, wdiv(OasisInterface(OTC_ADDRESS).getPayAmount(srcAddr, destAddr, _destAmount), _destAmount)); } /// @notice Send any leftover tokens, we use to clear out srcTokens after buy /// @param _srcAddr Source token address function sendLeftOver(address _srcAddr) internal { msg.sender.transfer(address(this).balance); if (_srcAddr != KYBER_ETH_ADDRESS) { ERC20(_srcAddr).safeTransfer(msg.sender, ERC20(_srcAddr).balanceOf(address(this))); } } /// @notice Converts Kybers Eth address -> Weth /// @param _src Input address function ethToWethAddr(address _src) internal pure returns (address) { return _src == KYBER_ETH_ADDRESS ? WETH_ADDRESS : _src; } receive() payable external {} } contract UniswapWrapperV3 is DSMath, ExchangeInterfaceV3, AdminAuth { address public constant WETH_ADDRESS = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; UniswapRouterInterface public constant router = UniswapRouterInterface(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D); using SafeERC20 for ERC20; /// @notice Sells a _srcAmount of tokens at UniswapV2 /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Destination amount function sell(address _srcAddr, address _destAddr, uint _srcAmount, bytes memory _additionalData) external payable override returns (uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); uint[] memory amounts; address[] memory path = abi.decode(_additionalData, (address[])); ERC20(_srcAddr).safeApprove(address(router), _srcAmount); // if we are buying ether if (_destAddr == WETH_ADDRESS) { amounts = router.swapExactTokensForETH(_srcAmount, 1, path, msg.sender, block.timestamp + 1); } // if we are selling token to token else { amounts = router.swapExactTokensForTokens(_srcAmount, 1, path, msg.sender, block.timestamp + 1); } return amounts[amounts.length - 1]; } /// @notice Buys a _destAmount of tokens at UniswapV2 /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint srcAmount function buy(address _srcAddr, address _destAddr, uint _destAmount, bytes memory _additionalData) external override payable returns(uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); uint[] memory amounts; address[] memory path = abi.decode(_additionalData, (address[])); ERC20(_srcAddr).safeApprove(address(router), uint(-1)); // if we are buying ether if (_destAddr == WETH_ADDRESS) { amounts = router.swapTokensForExactETH(_destAmount, uint(-1), path, msg.sender, block.timestamp + 1); } // if we are buying token to token else { amounts = router.swapTokensForExactTokens(_destAmount, uint(-1), path, msg.sender, block.timestamp + 1); } // Send the leftover from the source token back sendLeftOver(_srcAddr); return amounts[0]; } /// @notice Return a rate for which we can sell an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Rate function getSellRate(address _srcAddr, address _destAddr, uint _srcAmount, bytes memory _additionalData) public override view returns (uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); address[] memory path = abi.decode(_additionalData, (address[])); uint[] memory amounts = router.getAmountsOut(_srcAmount, path); return wdiv(amounts[amounts.length - 1], _srcAmount); } /// @notice Return a rate for which we can buy an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint Rate function getBuyRate(address _srcAddr, address _destAddr, uint _destAmount, bytes memory _additionalData) public override view returns (uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); address[] memory path = abi.decode(_additionalData, (address[])); uint[] memory amounts = router.getAmountsIn(_destAmount, path); return wdiv(_destAmount, amounts[0]); } /// @notice Send any leftover tokens, we use to clear out srcTokens after buy /// @param _srcAddr Source token address function sendLeftOver(address _srcAddr) internal { msg.sender.transfer(address(this).balance); if (_srcAddr != KYBER_ETH_ADDRESS) { ERC20(_srcAddr).safeTransfer(msg.sender, ERC20(_srcAddr).balanceOf(address(this))); } } /// @notice Converts Kybers Eth address -> Weth /// @param _src Input address function ethToWethAddr(address _src) internal pure returns (address) { return _src == KYBER_ETH_ADDRESS ? WETH_ADDRESS : _src; } function getDecimals(address _token) internal view returns (uint256) { if (_token == KYBER_ETH_ADDRESS) return 18; return ERC20(_token).decimals(); } receive() payable external {} } contract DyDxFlashLoanTaker is DydxFlashLoanBase, ProxyPermission { address public constant WETH_ADDR = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; /// @notice Takes flash loan for _receiver /// @dev Receiver must send back WETH + 2 wei after executing transaction /// @dev Method is meant to be called from proxy and proxy will give authorization to _receiver /// @param _receiver Address of funds receiver /// @param _ethAmount ETH amount that needs to be pulled from dydx /// @param _encodedData Bytes with packed data function takeLoan(address _receiver, uint256 _ethAmount, bytes memory _encodedData) public { ISoloMargin solo = ISoloMargin(SOLO_MARGIN_ADDRESS); // Get marketId from token address uint256 marketId = _getMarketIdFromTokenAddress(WETH_ADDR); // Calculate repay amount (_amount + (2 wei)) // Approve transfer from uint256 repayAmount = _getRepaymentAmountInternal(_ethAmount); ERC20(WETH_ADDR).approve(SOLO_MARGIN_ADDRESS, repayAmount); Actions.ActionArgs[] memory operations = new Actions.ActionArgs[](3); operations[0] = _getWithdrawAction(marketId, _ethAmount, _receiver); operations[1] = _getCallAction( _encodedData, _receiver ); operations[2] = _getDepositAction(marketId, repayAmount, address(this)); Account.Info[] memory accountInfos = new Account.Info[](1); accountInfos[0] = _getAccountInfo(); givePermission(_receiver); solo.operate(accountInfos, operations); removePermission(_receiver); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "DyDxFlashLoanTaken", abi.encode(_receiver, _ethAmount, _encodedData)); } } abstract contract CTokenInterface is ERC20 { function mint(uint256 mintAmount) external virtual returns (uint256); // function mint() external virtual payable; function accrueInterest() public virtual returns (uint); function redeem(uint256 redeemTokens) external virtual returns (uint256); function redeemUnderlying(uint256 redeemAmount) external virtual returns (uint256); function borrow(uint256 borrowAmount) external virtual returns (uint256); function borrowIndex() public view virtual returns (uint); function borrowBalanceStored(address) public view virtual returns(uint); function repayBorrow(uint256 repayAmount) external virtual returns (uint256); function repayBorrow() external virtual payable; function repayBorrowBehalf(address borrower, uint256 repayAmount) external virtual returns (uint256); function repayBorrowBehalf(address borrower) external virtual payable; function liquidateBorrow(address borrower, uint256 repayAmount, address cTokenCollateral) external virtual returns (uint256); function liquidateBorrow(address borrower, address cTokenCollateral) external virtual payable; function exchangeRateCurrent() external virtual returns (uint256); function supplyRatePerBlock() external virtual returns (uint256); function borrowRatePerBlock() external virtual returns (uint256); function totalReserves() external virtual returns (uint256); function reserveFactorMantissa() external virtual returns (uint256); function borrowBalanceCurrent(address account) external virtual returns (uint256); function totalBorrowsCurrent() external virtual returns (uint256); function getCash() external virtual returns (uint256); function balanceOfUnderlying(address owner) external virtual returns (uint256); function underlying() external virtual returns (address); function getAccountSnapshot(address account) external virtual view returns (uint, uint, uint, uint); } abstract contract ISubscriptionsV2 is StaticV2 { function getOwner(uint _cdpId) external view virtual returns(address); function getSubscribedInfo(uint _cdpId) public view virtual returns(bool, uint128, uint128, uint128, uint128, address, uint coll, uint debt); function getCdpHolder(uint _cdpId) public view virtual returns (bool subscribed, CdpHolder memory); } contract MCDMonitorV2 is DSMath, AdminAuth, GasBurner, StaticV2 { uint public REPAY_GAS_TOKEN = 25; uint public BOOST_GAS_TOKEN = 25; uint public MAX_GAS_PRICE = 500000000000; // 500 gwei uint public REPAY_GAS_COST = 1800000; uint public BOOST_GAS_COST = 1800000; MCDMonitorProxyV2 public monitorProxyContract; ISubscriptionsV2 public subscriptionsContract; address public mcdSaverTakerAddress; address public constant BOT_REGISTRY_ADDRESS = 0x637726f8b08a7ABE3aE3aCaB01A80E2d8ddeF77B; Manager public manager = Manager(0x5ef30b9986345249bc32d8928B7ee64DE9435E39); Vat public vat = Vat(0x35D1b3F3D7966A1DFe207aa4514C12a259A0492B); Spotter public spotter = Spotter(0x65C79fcB50Ca1594B025960e539eD7A9a6D434A3); DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); modifier onlyApproved() { require(BotRegistry(BOT_REGISTRY_ADDRESS).botList(msg.sender), "Not auth bot"); _; } constructor(address _monitorProxy, address _subscriptions, address _mcdSaverTakerAddress) public { monitorProxyContract = MCDMonitorProxyV2(_monitorProxy); subscriptionsContract = ISubscriptionsV2(_subscriptions); mcdSaverTakerAddress = _mcdSaverTakerAddress; } /// @notice Bots call this method to repay for user when conditions are met /// @dev If the contract ownes gas token it will try and use it for gas price reduction function repayFor( SaverExchangeCore.ExchangeData memory _exchangeData, uint _cdpId, uint _nextPrice, address _joinAddr ) public payable onlyApproved burnGas(REPAY_GAS_TOKEN) { (bool isAllowed, uint ratioBefore) = canCall(Method.Repay, _cdpId, _nextPrice); require(isAllowed); uint gasCost = calcGasCost(REPAY_GAS_COST); address owner = subscriptionsContract.getOwner(_cdpId); monitorProxyContract.callExecute{value: msg.value}( owner, mcdSaverTakerAddress, abi.encodeWithSignature( "repayWithLoan((address,address,uint256,uint256,uint256,address,address,bytes,uint256),uint256,uint256,address)", _exchangeData, _cdpId, gasCost, _joinAddr)); (bool isGoodRatio, uint ratioAfter) = ratioGoodAfter(Method.Repay, _cdpId, _nextPrice); require(isGoodRatio); returnEth(); logger.Log(address(this), owner, "AutomaticMCDRepay", abi.encode(ratioBefore, ratioAfter)); } /// @notice Bots call this method to boost for user when conditions are met /// @dev If the contract ownes gas token it will try and use it for gas price reduction function boostFor( SaverExchangeCore.ExchangeData memory _exchangeData, uint _cdpId, uint _nextPrice, address _joinAddr ) public payable onlyApproved burnGas(BOOST_GAS_TOKEN) { (bool isAllowed, uint ratioBefore) = canCall(Method.Boost, _cdpId, _nextPrice); require(isAllowed); uint gasCost = calcGasCost(BOOST_GAS_COST); address owner = subscriptionsContract.getOwner(_cdpId); monitorProxyContract.callExecute{value: msg.value}( owner, mcdSaverTakerAddress, abi.encodeWithSignature( "boostWithLoan((address,address,uint256,uint256,uint256,address,address,bytes,uint256),uint256,uint256,address)", _exchangeData, _cdpId, gasCost, _joinAddr)); (bool isGoodRatio, uint ratioAfter) = ratioGoodAfter(Method.Boost, _cdpId, _nextPrice); require(isGoodRatio); returnEth(); logger.Log(address(this), owner, "AutomaticMCDBoost", abi.encode(ratioBefore, ratioAfter)); } /******************* INTERNAL METHODS ********************************/ function returnEth() internal { // return if some eth left if (address(this).balance > 0) { msg.sender.transfer(address(this).balance); } } /******************* STATIC METHODS ********************************/ /// @notice Returns an address that owns the CDP /// @param _cdpId Id of the CDP function getOwner(uint _cdpId) public view returns(address) { return manager.owns(_cdpId); } /// @notice Gets CDP info (collateral, debt) /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP function getCdpInfo(uint _cdpId, bytes32 _ilk) public view returns (uint, uint) { address urn = manager.urns(_cdpId); (uint collateral, uint debt) = vat.urns(_ilk, urn); (,uint rate,,,) = vat.ilks(_ilk); return (collateral, rmul(debt, rate)); } /// @notice Gets a price of the asset /// @param _ilk Ilk of the CDP function getPrice(bytes32 _ilk) public view returns (uint) { (, uint mat) = spotter.ilks(_ilk); (,,uint spot,,) = vat.ilks(_ilk); return rmul(rmul(spot, spotter.par()), mat); } /// @notice Gets CDP ratio /// @param _cdpId Id of the CDP /// @param _nextPrice Next price for user function getRatio(uint _cdpId, uint _nextPrice) public view returns (uint) { bytes32 ilk = manager.ilks(_cdpId); uint price = (_nextPrice == 0) ? getPrice(ilk) : _nextPrice; (uint collateral, uint debt) = getCdpInfo(_cdpId, ilk); if (debt == 0) return 0; return rdiv(wmul(collateral, price), debt) / (10 ** 18); } /// @notice Checks if Boost/Repay could be triggered for the CDP /// @dev Called by MCDMonitor to enforce the min/max check function canCall(Method _method, uint _cdpId, uint _nextPrice) public view returns(bool, uint) { bool subscribed; CdpHolder memory holder; (subscribed, holder) = subscriptionsContract.getCdpHolder(_cdpId); // check if cdp is subscribed if (!subscribed) return (false, 0); // check if using next price is allowed if (_nextPrice > 0 && !holder.nextPriceEnabled) return (false, 0); // check if boost and boost allowed if (_method == Method.Boost && !holder.boostEnabled) return (false, 0); // check if owner is still owner if (getOwner(_cdpId) != holder.owner) return (false, 0); uint currRatio = getRatio(_cdpId, _nextPrice); if (_method == Method.Repay) { return (currRatio < holder.minRatio, currRatio); } else if (_method == Method.Boost) { return (currRatio > holder.maxRatio, currRatio); } } /// @dev After the Boost/Repay check if the ratio doesn't trigger another call function ratioGoodAfter(Method _method, uint _cdpId, uint _nextPrice) public view returns(bool, uint) { CdpHolder memory holder; (, holder) = subscriptionsContract.getCdpHolder(_cdpId); uint currRatio = getRatio(_cdpId, _nextPrice); if (_method == Method.Repay) { return (currRatio < holder.maxRatio, currRatio); } else if (_method == Method.Boost) { return (currRatio > holder.minRatio, currRatio); } } /// @notice Calculates gas cost (in Eth) of tx /// @dev Gas price is limited to MAX_GAS_PRICE to prevent attack of draining user CDP /// @param _gasAmount Amount of gas used for the tx function calcGasCost(uint _gasAmount) public view returns (uint) { uint gasPrice = tx.gasprice <= MAX_GAS_PRICE ? tx.gasprice : MAX_GAS_PRICE; return mul(gasPrice, _gasAmount); } /******************* OWNER ONLY OPERATIONS ********************************/ /// @notice Allows owner to change gas cost for boost operation, but only up to 3 millions /// @param _gasCost New gas cost for boost method function changeBoostGasCost(uint _gasCost) public onlyOwner { require(_gasCost < 3000000); BOOST_GAS_COST = _gasCost; } /// @notice Allows owner to change gas cost for repay operation, but only up to 3 millions /// @param _gasCost New gas cost for repay method function changeRepayGasCost(uint _gasCost) public onlyOwner { require(_gasCost < 3000000); REPAY_GAS_COST = _gasCost; } /// @notice Allows owner to change max gas price /// @param _maxGasPrice New max gas price function changeMaxGasPrice(uint _maxGasPrice) public onlyOwner { require(_maxGasPrice < 500000000000); MAX_GAS_PRICE = _maxGasPrice; } /// @notice Allows owner to change the amount of gas token burned per function call /// @param _gasAmount Amount of gas token /// @param _isRepay Flag to know for which function we are setting the gas token amount function changeGasTokenAmount(uint _gasAmount, bool _isRepay) public onlyOwner { if (_isRepay) { REPAY_GAS_TOKEN = _gasAmount; } else { BOOST_GAS_TOKEN = _gasAmount; } } } contract MCDCloseFlashLoan is SaverExchangeCore, MCDSaverProxyHelper, FlashLoanReceiverBase, AdminAuth { ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); uint public constant SERVICE_FEE = 400; // 0.25% Fee bytes32 internal constant ETH_ILK = 0x4554482d41000000000000000000000000000000000000000000000000000000; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; address public constant DAI_JOIN_ADDRESS = 0x9759A6Ac90977b93B58547b4A71c78317f391A28; address public constant SPOTTER_ADDRESS = 0x65C79fcB50Ca1594B025960e539eD7A9a6D434A3; address public constant VAT_ADDRESS = 0x35D1b3F3D7966A1DFe207aa4514C12a259A0492B; Manager public constant manager = Manager(0x5ef30b9986345249bc32d8928B7ee64DE9435E39); DaiJoin public constant daiJoin = DaiJoin(DAI_JOIN_ADDRESS); Spotter public constant spotter = Spotter(SPOTTER_ADDRESS); Vat public constant vat = Vat(VAT_ADDRESS); struct CloseData { uint cdpId; uint collAmount; uint daiAmount; uint minAccepted; address joinAddr; address proxy; uint flFee; bool toDai; address reserve; uint amount; } constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public {} function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { ( uint[8] memory numData, address[5] memory addrData, bytes memory callData, address proxy, bool toDai ) = abi.decode(_params, (uint256[8],address[5],bytes,address,bool)); ExchangeData memory exchangeData = ExchangeData({ srcAddr: addrData[0], destAddr: addrData[1], srcAmount: numData[4], destAmount: numData[5], minPrice: numData[6], wrapper: addrData[3], exchangeAddr: addrData[2], callData: callData, price0x: numData[7] }); CloseData memory closeData = CloseData({ cdpId: numData[0], collAmount: numData[1], daiAmount: numData[2], minAccepted: numData[3], joinAddr: addrData[4], proxy: proxy, flFee: _fee, toDai: toDai, reserve: _reserve, amount: _amount }); address user = DSProxy(payable(closeData.proxy)).owner(); closeCDP(closeData, exchangeData, user); } function closeCDP( CloseData memory _closeData, ExchangeData memory _exchangeData, address _user ) internal { paybackDebt(_closeData.cdpId, manager.ilks(_closeData.cdpId), _closeData.daiAmount); // payback whole debt uint drawnAmount = drawMaxCollateral(_closeData.cdpId, _closeData.joinAddr, _closeData.collAmount); // draw whole collateral uint daiSwaped = 0; uint dfsFee = 0; if (_closeData.toDai) { _exchangeData.srcAmount = drawnAmount; (, daiSwaped) = _sell(_exchangeData); dfsFee = getFee(daiSwaped, _user); } else { dfsFee = getFee(_closeData.daiAmount, _user); _exchangeData.destAmount = (_closeData.daiAmount + _closeData.flFee + dfsFee); (, daiSwaped) = _buy(_exchangeData); } takeFee(dfsFee); address tokenAddr = getVaultCollAddr(_closeData.joinAddr); if (_closeData.toDai) { tokenAddr = DAI_ADDRESS; } require(getBalance(tokenAddr) >= _closeData.minAccepted, "Below min. number of eth specified"); transferFundsBackToPoolInternal(_closeData.reserve, _closeData.amount.add(_closeData.flFee)); sendLeftover(tokenAddr, DAI_ADDRESS, payable(_user)); } function drawMaxCollateral(uint _cdpId, address _joinAddr, uint _amount) internal returns (uint) { manager.frob(_cdpId, -toPositiveInt(_amount), 0); manager.flux(_cdpId, address(this), _amount); uint joinAmount = _amount; if (Join(_joinAddr).dec() != 18) { joinAmount = _amount / (10 ** (18 - Join(_joinAddr).dec())); } Join(_joinAddr).exit(address(this), joinAmount); if (isEthJoinAddr(_joinAddr)) { Join(_joinAddr).gem().withdraw(joinAmount); // Weth -> Eth } return joinAmount; } function paybackDebt(uint _cdpId, bytes32 _ilk, uint _daiAmount) internal { address urn = manager.urns(_cdpId); daiJoin.dai().approve(DAI_JOIN_ADDRESS, _daiAmount); daiJoin.join(urn, _daiAmount); manager.frob(_cdpId, 0, normalizePaybackAmount(VAT_ADDRESS, urn, _ilk)); } function takeFee(uint _feeAmount) internal returns (uint) { ERC20(DAI_ADDRESS).transfer(WALLET_ID, _feeAmount); } function getFee(uint _amount, address _owner) internal view returns (uint feeAmount) { uint fee = SERVICE_FEE; if (Discount(DISCOUNT_ADDRESS).isCustomFeeSet(_owner)) { fee = Discount(DISCOUNT_ADDRESS).getCustomServiceFee(_owner); } feeAmount = (fee == 0) ? 0 : (_amount / fee); // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } } function getVaultCollAddr(address _joinAddr) internal view returns (address) { address tokenAddr = address(Join(_joinAddr).gem()); if (tokenAddr == WETH_ADDRESS) { return KYBER_ETH_ADDRESS; } return tokenAddr; } function getPrice(bytes32 _ilk) public view returns (uint256) { (, uint256 mat) = spotter.ilks(_ilk); (, , uint256 spot, , ) = vat.ilks(_ilk); return rmul(rmul(spot, spotter.par()), mat); } receive() external override(FlashLoanReceiverBase, SaverExchangeCore) payable {} } contract MCDCloseTaker is MCDSaverProxyHelper { address public constant SUBSCRIPTION_ADDRESS_NEW = 0xC45d4f6B6bf41b6EdAA58B01c4298B8d9078269a; address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); // solhint-disable-next-line const-name-snakecase Manager public constant manager = Manager(0x5ef30b9986345249bc32d8928B7ee64DE9435E39); address public constant SPOTTER_ADDRESS = 0x65C79fcB50Ca1594B025960e539eD7A9a6D434A3; address public constant VAT_ADDRESS = 0x35D1b3F3D7966A1DFe207aa4514C12a259A0492B; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; // solhint-disable-next-line const-name-snakecase DefisaverLogger public constant logger = DefisaverLogger(DEFISAVER_LOGGER); struct CloseData { uint cdpId; address joinAddr; uint collAmount; uint daiAmount; uint minAccepted; bool wholeDebt; bool toDai; } Vat public constant vat = Vat(VAT_ADDRESS); Spotter public constant spotter = Spotter(SPOTTER_ADDRESS); function closeWithLoan( SaverExchangeCore.ExchangeData memory _exchangeData, CloseData memory _closeData, address payable mcdCloseFlashLoan ) public payable { mcdCloseFlashLoan.transfer(msg.value); // 0x fee if (_closeData.wholeDebt) { _closeData.daiAmount = getAllDebt( VAT_ADDRESS, manager.urns(_closeData.cdpId), manager.urns(_closeData.cdpId), manager.ilks(_closeData.cdpId) ); (_closeData.collAmount, ) = getCdpInfo(manager, _closeData.cdpId, manager.ilks(_closeData.cdpId)); } manager.cdpAllow(_closeData.cdpId, mcdCloseFlashLoan, 1); (uint[8] memory numData, address[5] memory addrData, bytes memory callData) = _packData(_closeData, _exchangeData); bytes memory paramsData = abi.encode(numData, addrData, callData, address(this), _closeData.toDai); lendingPool.flashLoan(mcdCloseFlashLoan, DAI_ADDRESS, _closeData.daiAmount, paramsData); manager.cdpAllow(_closeData.cdpId, mcdCloseFlashLoan, 0); // If sub. to automatic protection unsubscribe unsubscribe(SUBSCRIPTION_ADDRESS_NEW, _closeData.cdpId); logger.Log(address(this), msg.sender, "MCDClose", abi.encode(_closeData.cdpId, _closeData.collAmount, _closeData.daiAmount, _closeData.toDai)); } /// @notice Gets the maximum amount of debt available to generate /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP function getMaxDebt(uint256 _cdpId, bytes32 _ilk) public view returns (uint256) { uint256 price = getPrice(_ilk); (, uint256 mat) = spotter.ilks(_ilk); (uint256 collateral, uint256 debt) = getCdpInfo(manager, _cdpId, _ilk); return sub(wdiv(wmul(collateral, price), mat), debt); } /// @notice Gets a price of the asset /// @param _ilk Ilk of the CDP function getPrice(bytes32 _ilk) public view returns (uint256) { (, uint256 mat) = spotter.ilks(_ilk); (, , uint256 spot, , ) = vat.ilks(_ilk); return rmul(rmul(spot, spotter.par()), mat); } function unsubscribe(address _subContract, uint _cdpId) internal { (, bool isSubscribed) = IMCDSubscriptions(_subContract).subscribersPos(_cdpId); if (isSubscribed) { IMCDSubscriptions(_subContract).unsubscribe(_cdpId); } } function _packData( CloseData memory _closeData, SaverExchangeCore.ExchangeData memory exchangeData ) internal pure returns (uint[8] memory numData, address[5] memory addrData, bytes memory callData) { numData = [ _closeData.cdpId, _closeData.collAmount, _closeData.daiAmount, _closeData.minAccepted, exchangeData.srcAmount, exchangeData.destAmount, exchangeData.minPrice, exchangeData.price0x ]; addrData = [ exchangeData.srcAddr, exchangeData.destAddr, exchangeData.exchangeAddr, exchangeData.wrapper, _closeData.joinAddr ]; callData = exchangeData.callData; } } contract MCDCreateFlashLoan is SaverExchangeCore, AdminAuth, FlashLoanReceiverBase { address public constant CREATE_PROXY_ACTIONS = 0x6d0984E80a86f26c0dd564ca0CF74a8E9Da03305; uint public constant SERVICE_FEE = 400; // 0.25% Fee address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); address public constant DAI_JOIN_ADDRESS = 0x9759A6Ac90977b93B58547b4A71c78317f391A28; address public constant JUG_ADDRESS = 0x19c0976f590D67707E62397C87829d896Dc0f1F1; address public constant MANAGER_ADDRESS = 0x5ef30b9986345249bc32d8928B7ee64DE9435E39; constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public {} function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { //check the contract has the specified balance require(_amount <= getBalanceInternal(address(this), _reserve), "Invalid balance for the contract"); ( uint[6] memory numData, address[5] memory addrData, bytes memory callData, address proxy ) = abi.decode(_params, (uint256[6],address[5],bytes,address)); ExchangeData memory exchangeData = ExchangeData({ srcAddr: addrData[0], destAddr: addrData[1], srcAmount: numData[2], destAmount: numData[3], minPrice: numData[4], wrapper: addrData[3], exchangeAddr: addrData[2], callData: callData, price0x: numData[5] }); openAndLeverage(numData[0], numData[1] + _fee, addrData[4], proxy, exchangeData); transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } } function openAndLeverage( uint _collAmount, uint _daiAmountAndFee, address _joinAddr, address _proxy, ExchangeData memory _exchangeData ) public { uint dfsFee = getFee(_exchangeData.srcAmount, DSProxy(payable(_proxy)).owner()); _exchangeData.srcAmount = (_exchangeData.srcAmount - dfsFee); (, uint256 collSwaped) = _sell(_exchangeData); bytes32 ilk = Join(_joinAddr).ilk(); if (isEthJoinAddr(_joinAddr)) { MCDCreateProxyActions(CREATE_PROXY_ACTIONS).openLockETHAndDraw{value: address(this).balance}( MANAGER_ADDRESS, JUG_ADDRESS, _joinAddr, DAI_JOIN_ADDRESS, ilk, _daiAmountAndFee, _proxy ); } else { ERC20(address(Join(_joinAddr).gem())).safeApprove(CREATE_PROXY_ACTIONS, uint256(-1)); MCDCreateProxyActions(CREATE_PROXY_ACTIONS).openLockGemAndDraw( MANAGER_ADDRESS, JUG_ADDRESS, _joinAddr, DAI_JOIN_ADDRESS, ilk, (_collAmount + collSwaped), _daiAmountAndFee, true, _proxy ); } } function getFee(uint _amount, address _owner) internal returns (uint feeAmount) { uint fee = SERVICE_FEE; if (Discount(DISCOUNT_ADDRESS).isCustomFeeSet(_owner)) { fee = Discount(DISCOUNT_ADDRESS).getCustomServiceFee(_owner); } feeAmount = (fee == 0) ? 0 : (_amount / fee); // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } ERC20(DAI_ADDRESS).transfer(WALLET_ID, feeAmount); } /// @notice Checks if the join address is one of the Ether coll. types /// @param _joinAddr Join address to check function isEthJoinAddr(address _joinAddr) internal view returns (bool) { // if it's dai_join_addr don't check gem() it will fail if (_joinAddr == 0x9759A6Ac90977b93B58547b4A71c78317f391A28) return false; // if coll is weth it's and eth type coll if (address(Join(_joinAddr).gem()) == 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2) { return true; } return false; } receive() external override(FlashLoanReceiverBase, SaverExchangeCore) payable {} } contract MCDSaverProxy is SaverExchangeCore, MCDSaverProxyHelper { uint public constant MANUAL_SERVICE_FEE = 400; // 0.25% Fee uint public constant AUTOMATIC_SERVICE_FEE = 333; // 0.3% Fee bytes32 public constant ETH_ILK = 0x4554482d41000000000000000000000000000000000000000000000000000000; address public constant MANAGER_ADDRESS = 0x5ef30b9986345249bc32d8928B7ee64DE9435E39; address public constant VAT_ADDRESS = 0x35D1b3F3D7966A1DFe207aa4514C12a259A0492B; address public constant SPOTTER_ADDRESS = 0x65C79fcB50Ca1594B025960e539eD7A9a6D434A3; address public constant DAI_JOIN_ADDRESS = 0x9759A6Ac90977b93B58547b4A71c78317f391A28; address public constant JUG_ADDRESS = 0x19c0976f590D67707E62397C87829d896Dc0f1F1; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; address public constant BOT_REGISTRY_ADDRESS = 0x637726f8b08a7ABE3aE3aCaB01A80E2d8ddeF77B; Manager public constant manager = Manager(MANAGER_ADDRESS); Vat public constant vat = Vat(VAT_ADDRESS); DaiJoin public constant daiJoin = DaiJoin(DAI_JOIN_ADDRESS); Spotter public constant spotter = Spotter(SPOTTER_ADDRESS); DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); /// @notice Repay - draws collateral, converts to Dai and repays the debt /// @dev Must be called by the DSProxy contract that owns the CDP function repay( SaverExchangeCore.ExchangeData memory _exchangeData, uint _cdpId, uint _gasCost, address _joinAddr ) public payable { address owner = getOwner(manager, _cdpId); bytes32 ilk = manager.ilks(_cdpId); drawCollateral(_cdpId, _joinAddr, _exchangeData.srcAmount); (, uint daiAmount) = _sell(_exchangeData); uint daiAfterFee = sub(daiAmount, getFee(daiAmount, _gasCost, owner)); paybackDebt(_cdpId, ilk, daiAfterFee, owner); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } logger.Log(address(this), msg.sender, "MCDRepay", abi.encode(_cdpId, owner, _exchangeData.srcAmount, daiAmount)); } /// @notice Boost - draws Dai, converts to collateral and adds to CDP /// @dev Must be called by the DSProxy contract that owns the CDP function boost( SaverExchangeCore.ExchangeData memory _exchangeData, uint _cdpId, uint _gasCost, address _joinAddr ) public payable { address owner = getOwner(manager, _cdpId); bytes32 ilk = manager.ilks(_cdpId); uint daiDrawn = drawDai(_cdpId, ilk, _exchangeData.srcAmount); uint daiAfterFee = sub(daiDrawn, getFee(daiDrawn, _gasCost, owner)); _exchangeData.srcAmount = daiAfterFee; (, uint swapedColl) = _sell(_exchangeData); addCollateral(_cdpId, _joinAddr, swapedColl); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } logger.Log(address(this), msg.sender, "MCDBoost", abi.encode(_cdpId, owner, _exchangeData.srcAmount, swapedColl)); } /// @notice Draws Dai from the CDP /// @dev If _daiAmount is bigger than max available we'll draw max /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP /// @param _daiAmount Amount of Dai to draw function drawDai(uint _cdpId, bytes32 _ilk, uint _daiAmount) internal returns (uint) { uint rate = Jug(JUG_ADDRESS).drip(_ilk); uint daiVatBalance = vat.dai(manager.urns(_cdpId)); uint maxAmount = getMaxDebt(_cdpId, _ilk); if (_daiAmount >= maxAmount) { _daiAmount = sub(maxAmount, 1); } manager.frob(_cdpId, int(0), normalizeDrawAmount(_daiAmount, rate, daiVatBalance)); manager.move(_cdpId, address(this), toRad(_daiAmount)); if (vat.can(address(this), address(DAI_JOIN_ADDRESS)) == 0) { vat.hope(DAI_JOIN_ADDRESS); } DaiJoin(DAI_JOIN_ADDRESS).exit(address(this), _daiAmount); return _daiAmount; } /// @notice Adds collateral to the CDP /// @param _cdpId Id of the CDP /// @param _joinAddr Address of the join contract for the CDP collateral /// @param _amount Amount of collateral to add function addCollateral(uint _cdpId, address _joinAddr, uint _amount) internal { int convertAmount = 0; if (isEthJoinAddr(_joinAddr)) { Join(_joinAddr).gem().deposit{value: _amount}(); convertAmount = toPositiveInt(_amount); } else { convertAmount = toPositiveInt(convertTo18(_joinAddr, _amount)); } ERC20(address(Join(_joinAddr).gem())).safeApprove(_joinAddr, _amount); Join(_joinAddr).join(address(this), _amount); vat.frob( manager.ilks(_cdpId), manager.urns(_cdpId), address(this), address(this), convertAmount, 0 ); } /// @notice Draws collateral and returns it to DSProxy /// @dev If _amount is bigger than max available we'll draw max /// @param _cdpId Id of the CDP /// @param _joinAddr Address of the join contract for the CDP collateral /// @param _amount Amount of collateral to draw function drawCollateral(uint _cdpId, address _joinAddr, uint _amount) internal returns (uint) { uint frobAmount = _amount; if (Join(_joinAddr).dec() != 18) { frobAmount = _amount * (10 ** (18 - Join(_joinAddr).dec())); } manager.frob(_cdpId, -toPositiveInt(frobAmount), 0); manager.flux(_cdpId, address(this), frobAmount); Join(_joinAddr).exit(address(this), _amount); if (isEthJoinAddr(_joinAddr)) { Join(_joinAddr).gem().withdraw(_amount); // Weth -> Eth } return _amount; } /// @notice Paybacks Dai debt /// @dev If the _daiAmount is bigger than the whole debt, returns extra Dai /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP /// @param _daiAmount Amount of Dai to payback /// @param _owner Address that owns the DSProxy that owns the CDP function paybackDebt(uint _cdpId, bytes32 _ilk, uint _daiAmount, address _owner) internal { address urn = manager.urns(_cdpId); uint wholeDebt = getAllDebt(VAT_ADDRESS, urn, urn, _ilk); if (_daiAmount > wholeDebt) { ERC20(DAI_ADDRESS).transfer(_owner, sub(_daiAmount, wholeDebt)); _daiAmount = wholeDebt; } if (ERC20(DAI_ADDRESS).allowance(address(this), DAI_JOIN_ADDRESS) == 0) { ERC20(DAI_ADDRESS).approve(DAI_JOIN_ADDRESS, uint(-1)); } daiJoin.join(urn, _daiAmount); manager.frob(_cdpId, 0, normalizePaybackAmount(VAT_ADDRESS, urn, _ilk)); } /// @notice Calculates the fee amount /// @param _amount Dai amount that is converted /// @param _gasCost Used for Monitor, estimated gas cost of tx /// @param _owner The address that controlls the DSProxy that owns the CDP function getFee(uint _amount, uint _gasCost, address _owner) internal returns (uint feeAmount) { uint fee = MANUAL_SERVICE_FEE; if (BotRegistry(BOT_REGISTRY_ADDRESS).botList(tx.origin)) { fee = AUTOMATIC_SERVICE_FEE; } if (Discount(DISCOUNT_ADDRESS).isCustomFeeSet(_owner)) { fee = Discount(DISCOUNT_ADDRESS).getCustomServiceFee(_owner); } feeAmount = (fee == 0) ? 0 : (_amount / fee); if (_gasCost != 0) { uint ethDaiPrice = getPrice(ETH_ILK); _gasCost = rmul(_gasCost, ethDaiPrice); feeAmount = add(feeAmount, _gasCost); } // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } ERC20(DAI_ADDRESS).transfer(WALLET_ID, feeAmount); } /// @notice Gets the maximum amount of collateral available to draw /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP /// @param _joinAddr Joind address of collateral /// @dev Substracts 10 wei to aviod rounding error later on function getMaxCollateral(uint _cdpId, bytes32 _ilk, address _joinAddr) public view returns (uint) { uint price = getPrice(_ilk); (uint collateral, uint debt) = getCdpInfo(manager, _cdpId, _ilk); (, uint mat) = Spotter(SPOTTER_ADDRESS).ilks(_ilk); uint maxCollateral = sub(collateral, (div(mul(mat, debt), price))); uint normalizeMaxCollateral = maxCollateral / (10 ** (18 - Join(_joinAddr).dec())); // take one percent due to precision issues return normalizeMaxCollateral * 99 / 100; } /// @notice Gets the maximum amount of debt available to generate /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP /// @dev Substracts 10 wei to aviod rounding error later on function getMaxDebt(uint _cdpId, bytes32 _ilk) public virtual view returns (uint) { uint price = getPrice(_ilk); (, uint mat) = spotter.ilks(_ilk); (uint collateral, uint debt) = getCdpInfo(manager, _cdpId, _ilk); return sub(sub(div(mul(collateral, price), mat), debt), 10); } /// @notice Gets a price of the asset /// @param _ilk Ilk of the CDP function getPrice(bytes32 _ilk) public view returns (uint) { (, uint mat) = spotter.ilks(_ilk); (,,uint spot,,) = vat.ilks(_ilk); return rmul(rmul(spot, spotter.par()), mat); } /// @notice Gets CDP ratio /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP function getRatio(uint _cdpId, bytes32 _ilk) public view returns (uint) { uint price = getPrice( _ilk); (uint collateral, uint debt) = getCdpInfo(manager, _cdpId, _ilk); if (debt == 0) return 0; return rdiv(wmul(collateral, price), debt); } /// @notice Gets CDP info (collateral, debt, price, ilk) /// @param _cdpId Id of the CDP function getCdpDetailedInfo(uint _cdpId) public view returns (uint collateral, uint debt, uint price, bytes32 ilk) { address urn = manager.urns(_cdpId); ilk = manager.ilks(_cdpId); (collateral, debt) = vat.urns(ilk, urn); (,uint rate,,,) = vat.ilks(ilk); debt = rmul(debt, rate); price = getPrice(ilk); } } contract MCDSaverTaker is MCDSaverProxy, GasBurner { address payable public constant MCD_SAVER_FLASH_LOAN = 0xec504C93A40A557cC85dAc3e908E85A887438079; address public constant AAVE_POOL_CORE = 0x3dfd23A6c5E8BbcFc9581d2E864a68feb6a076d3; ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); function boostWithLoan( SaverExchangeCore.ExchangeData memory _exchangeData, uint _cdpId, uint _gasCost, address _joinAddr ) public payable burnGas(25) { uint256 maxDebt = getMaxDebt(_cdpId, manager.ilks(_cdpId)); uint maxLiq = getAvailableLiquidity(DAI_JOIN_ADDRESS); if (maxDebt >= _exchangeData.srcAmount || maxLiq == 0) { if (_exchangeData.srcAmount > maxDebt) { _exchangeData.srcAmount = maxDebt; } boost(_exchangeData, _cdpId, _gasCost, _joinAddr); return; } uint256 loanAmount = sub(_exchangeData.srcAmount, maxDebt); loanAmount = loanAmount > maxLiq ? maxLiq : loanAmount; MCD_SAVER_FLASH_LOAN.transfer(msg.value); // 0x fee manager.cdpAllow(_cdpId, MCD_SAVER_FLASH_LOAN, 1); bytes memory paramsData = abi.encode(packExchangeData(_exchangeData), _cdpId, _gasCost, _joinAddr, false); lendingPool.flashLoan(MCD_SAVER_FLASH_LOAN, DAI_ADDRESS, loanAmount, paramsData); manager.cdpAllow(_cdpId, MCD_SAVER_FLASH_LOAN, 0); } function repayWithLoan( SaverExchangeCore.ExchangeData memory _exchangeData, uint _cdpId, uint _gasCost, address _joinAddr ) public payable burnGas(25) { uint256 maxColl = getMaxCollateral(_cdpId, manager.ilks(_cdpId), _joinAddr); uint maxLiq = getAvailableLiquidity(_joinAddr); if (maxColl >= _exchangeData.srcAmount || maxLiq == 0) { if (_exchangeData.srcAmount > maxColl) { _exchangeData.srcAmount = maxColl; } repay(_exchangeData, _cdpId, _gasCost, _joinAddr); return; } uint256 loanAmount = sub(_exchangeData.srcAmount, maxColl); loanAmount = loanAmount > maxLiq ? maxLiq : loanAmount; MCD_SAVER_FLASH_LOAN.transfer(msg.value); // 0x fee manager.cdpAllow(_cdpId, MCD_SAVER_FLASH_LOAN, 1); bytes memory paramsData = abi.encode(packExchangeData(_exchangeData), _cdpId, _gasCost, _joinAddr, true); lendingPool.flashLoan(MCD_SAVER_FLASH_LOAN, getAaveCollAddr(_joinAddr), loanAmount, paramsData); manager.cdpAllow(_cdpId, MCD_SAVER_FLASH_LOAN, 0); } /// @notice Gets the maximum amount of debt available to generate /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP function getMaxDebt(uint256 _cdpId, bytes32 _ilk) public override view returns (uint256) { uint256 price = getPrice(_ilk); (, uint256 mat) = spotter.ilks(_ilk); (uint256 collateral, uint256 debt) = getCdpInfo(manager, _cdpId, _ilk); return sub(wdiv(wmul(collateral, price), mat), debt); } function getAaveCollAddr(address _joinAddr) internal view returns (address) { if (isEthJoinAddr(_joinAddr) || _joinAddr == 0x775787933e92b709f2a3C70aa87999696e74A9F8) { return KYBER_ETH_ADDRESS; } else if (_joinAddr == DAI_JOIN_ADDRESS) { return DAI_ADDRESS; } else { return getCollateralAddr(_joinAddr); } } function getAvailableLiquidity(address _joinAddr) internal view returns (uint liquidity) { address tokenAddr = getAaveCollAddr(_joinAddr); if (tokenAddr == KYBER_ETH_ADDRESS) { liquidity = AAVE_POOL_CORE.balance; } else { liquidity = ERC20(tokenAddr).balanceOf(AAVE_POOL_CORE); } } function _packData( uint _cdpId, uint _gasCost, address _joinAddr, SaverExchangeCore.ExchangeData memory exchangeData ) internal pure returns (uint[6] memory numData, address[5] memory addrData, bytes memory callData) { numData = [ exchangeData.srcAmount, exchangeData.destAmount, exchangeData.minPrice, exchangeData.price0x, _cdpId, _gasCost ]; addrData = [ exchangeData.srcAddr, exchangeData.destAddr, exchangeData.exchangeAddr, exchangeData.wrapper, _joinAddr ]; callData = exchangeData.callData; } } contract SavingsProxy is DSRSavingsProtocol, CompoundSavingsProtocol { address public constant ADAI_ADDRESS = 0xfC1E690f61EFd961294b3e1Ce3313fBD8aa4f85d; address public constant SAVINGS_DYDX_ADDRESS = 0x03b1565e070df392e48e7a8e01798C4B00E534A5; address public constant SAVINGS_AAVE_ADDRESS = 0x535B9035E9bA8D7efe0FeAEac885fb65b303E37C; address public constant NEW_IDAI_ADDRESS = 0x493C57C4763932315A328269E1ADaD09653B9081; address public constant COMP_ADDRESS = 0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B; address public constant SAVINGS_LOGGER_ADDRESS = 0x89b3635BD2bAD145C6f92E82C9e83f06D5654984; address public constant SOLO_MARGIN_ADDRESS = 0x1E0447b19BB6EcFdAe1e4AE1694b0C3659614e4e; enum SavingsProtocol {Compound, Dydx, Fulcrum, Dsr, Aave} function deposit(SavingsProtocol _protocol, uint256 _amount) public { if (_protocol == SavingsProtocol.Dsr) { dsrDeposit(_amount, true); } else if (_protocol == SavingsProtocol.Compound) { compDeposit(msg.sender, _amount); } else { _deposit(_protocol, _amount, true); } SavingsLogger(SAVINGS_LOGGER_ADDRESS).logDeposit(msg.sender, uint8(_protocol), _amount); } function withdraw(SavingsProtocol _protocol, uint256 _amount) public { if (_protocol == SavingsProtocol.Dsr) { dsrWithdraw(_amount, true); } else if (_protocol == SavingsProtocol.Compound) { compWithdraw(msg.sender, _amount); } else { _withdraw(_protocol, _amount, true); } SavingsLogger(SAVINGS_LOGGER_ADDRESS).logWithdraw(msg.sender, uint8(_protocol), _amount); } function swap(SavingsProtocol _from, SavingsProtocol _to, uint256 _amount) public { if (_from == SavingsProtocol.Dsr) { dsrWithdraw(_amount, false); } else if (_from == SavingsProtocol.Compound) { compWithdraw(msg.sender, _amount); } else { _withdraw(_from, _amount, false); } // possible to withdraw 1-2 wei less than actual amount due to division precision // so we deposit all amount on DSProxy uint256 amountToDeposit = ERC20(DAI_ADDRESS).balanceOf(address(this)); if (_to == SavingsProtocol.Dsr) { dsrDeposit(amountToDeposit, false); } else if (_from == SavingsProtocol.Compound) { compDeposit(msg.sender, _amount); } else { _deposit(_to, amountToDeposit, false); } SavingsLogger(SAVINGS_LOGGER_ADDRESS).logSwap( msg.sender, uint8(_from), uint8(_to), _amount ); } function withdrawDai() public { ERC20(DAI_ADDRESS).transfer(msg.sender, ERC20(DAI_ADDRESS).balanceOf(address(this))); } function claimComp() public { ComptrollerInterface(COMP_ADDRESS).claimComp(address(this)); } function getAddress(SavingsProtocol _protocol) public pure returns (address) { if (_protocol == SavingsProtocol.Dydx) { return SAVINGS_DYDX_ADDRESS; } if (_protocol == SavingsProtocol.Aave) { return SAVINGS_AAVE_ADDRESS; } } function _deposit(SavingsProtocol _protocol, uint256 _amount, bool _fromUser) internal { if (_fromUser) { ERC20(DAI_ADDRESS).transferFrom(msg.sender, address(this), _amount); } approveDeposit(_protocol); ProtocolInterface(getAddress(_protocol)).deposit(address(this), _amount); endAction(_protocol); } function _withdraw(SavingsProtocol _protocol, uint256 _amount, bool _toUser) public { approveWithdraw(_protocol); ProtocolInterface(getAddress(_protocol)).withdraw(address(this), _amount); endAction(_protocol); if (_toUser) { withdrawDai(); } } function endAction(SavingsProtocol _protocol) internal { if (_protocol == SavingsProtocol.Dydx) { setDydxOperator(false); } } function approveDeposit(SavingsProtocol _protocol) internal { if (_protocol == SavingsProtocol.Compound || _protocol == SavingsProtocol.Fulcrum || _protocol == SavingsProtocol.Aave) { ERC20(DAI_ADDRESS).approve(getAddress(_protocol), uint256(-1)); } if (_protocol == SavingsProtocol.Dydx) { ERC20(DAI_ADDRESS).approve(SOLO_MARGIN_ADDRESS, uint256(-1)); setDydxOperator(true); } } function approveWithdraw(SavingsProtocol _protocol) internal { if (_protocol == SavingsProtocol.Compound) { ERC20(NEW_CDAI_ADDRESS).approve(getAddress(_protocol), uint256(-1)); } if (_protocol == SavingsProtocol.Dydx) { setDydxOperator(true); } if (_protocol == SavingsProtocol.Fulcrum) { ERC20(NEW_IDAI_ADDRESS).approve(getAddress(_protocol), uint256(-1)); } if (_protocol == SavingsProtocol.Aave) { ERC20(ADAI_ADDRESS).approve(getAddress(_protocol), uint256(-1)); } } function setDydxOperator(bool _trusted) internal { ISoloMargin.OperatorArg[] memory operatorArgs = new ISoloMargin.OperatorArg[](1); operatorArgs[0] = ISoloMargin.OperatorArg({ operator: getAddress(SavingsProtocol.Dydx), trusted: _trusted }); ISoloMargin(SOLO_MARGIN_ADDRESS).setOperators(operatorArgs); } } contract LoanShifterReceiver is SaverExchangeCore, FlashLoanReceiverBase, AdminAuth { address payable public constant WALLET_ADDR = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; address public constant DISCOUNT_ADDR = 0x1b14E8D511c9A4395425314f849bD737BAF8208F; ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; ShifterRegistry public constant shifterRegistry = ShifterRegistry(0x597C52281b31B9d949a9D8fEbA08F7A2530a965e); struct ParamData { bytes proxyData1; bytes proxyData2; address proxy; address debtAddr; uint8 protocol1; uint8 protocol2; uint8 swapType; } constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public {} function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { // Format the call data for DSProxy (ParamData memory paramData, ExchangeData memory exchangeData) = packFunctionCall(_amount, _fee, _params); address protocolAddr1 = shifterRegistry.getAddr(getNameByProtocol(paramData.protocol1)); address protocolAddr2 = shifterRegistry.getAddr(getNameByProtocol(paramData.protocol2)); // Send Flash loan amount to DSProxy sendToProxy(payable(paramData.proxy), _reserve, _amount); // Execute the Close/Change debt operation DSProxyInterface(paramData.proxy).execute(protocolAddr1, paramData.proxyData1); if (paramData.swapType == 1) { // COLL_SWAP exchangeData.srcAmount -= getFee(getBalance(exchangeData.srcAddr), exchangeData.srcAddr, paramData.proxy); (, uint amount) = _sell(exchangeData); sendToProxy(payable(paramData.proxy), exchangeData.destAddr, amount); } else if (paramData.swapType == 2) { // DEBT_SWAP exchangeData.srcAmount -= getFee(exchangeData.srcAmount, exchangeData.srcAddr, paramData.proxy); exchangeData.destAmount = (_amount + _fee); _buy(exchangeData); // Send extra to DSProxy sendToProxy(payable(paramData.proxy), exchangeData.srcAddr, ERC20(exchangeData.srcAddr).balanceOf(address(this))); } else { // NO_SWAP just send tokens to proxy sendToProxy(payable(paramData.proxy), exchangeData.srcAddr, getBalance(exchangeData.srcAddr)); } // Execute the Open operation DSProxyInterface(paramData.proxy).execute(protocolAddr2, paramData.proxyData2); // Repay FL transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } } function packFunctionCall(uint _amount, uint _fee, bytes memory _params) internal pure returns (ParamData memory paramData, ExchangeData memory exchangeData) { ( uint[8] memory numData, // collAmount, debtAmount, id1, id2, srcAmount, destAmount, minPrice, price0x address[8] memory addrData, // addrLoan1, addrLoan2, debtAddr1, debtAddr2, srcAddr, destAddr, exchangeAddr, wrapper uint8[3] memory enumData, // fromProtocol, toProtocol, swapType bytes memory callData, address proxy ) = abi.decode(_params, (uint256[8],address[8],uint8[3],bytes,address)); bytes memory proxyData1; bytes memory proxyData2; uint openDebtAmount = (_amount + _fee); if (enumData[0] == 0) { // MAKER FROM proxyData1 = abi.encodeWithSignature("close(uint256,address,uint256,uint256)", numData[2], addrData[0], _amount, numData[0]); } else if(enumData[0] == 1) { // COMPOUND FROM if (enumData[2] == 2) { // DEBT_SWAP proxyData1 = abi.encodeWithSignature("changeDebt(address,address,uint256,uint256)", addrData[2], addrData[3], _amount, numData[4]); } else { proxyData1 = abi.encodeWithSignature("close(address,address,uint256,uint256)", addrData[0], addrData[2], numData[0], numData[1]); } } if (enumData[1] == 0) { // MAKER TO proxyData2 = abi.encodeWithSignature("open(uint256,address,uint256)", numData[3], addrData[1], openDebtAmount); } else if(enumData[1] == 1) { // COMPOUND TO if (enumData[2] == 2) { // DEBT_SWAP proxyData2 = abi.encodeWithSignature("repayAll(address)", addrData[3]); } else { proxyData2 = abi.encodeWithSignature("open(address,address,uint256)", addrData[1], addrData[3], openDebtAmount); } } paramData = ParamData({ proxyData1: proxyData1, proxyData2: proxyData2, proxy: proxy, debtAddr: addrData[2], protocol1: enumData[0], protocol2: enumData[1], swapType: enumData[2] }); exchangeData = SaverExchangeCore.ExchangeData({ srcAddr: addrData[4], destAddr: addrData[5], srcAmount: numData[4], destAmount: numData[5], minPrice: numData[6], wrapper: addrData[7], exchangeAddr: addrData[6], callData: callData, price0x: numData[7] }); } function sendToProxy(address payable _proxy, address _reserve, uint _amount) internal { if (_reserve != ETH_ADDRESS) { ERC20(_reserve).safeTransfer(_proxy, _amount); } _proxy.transfer(address(this).balance); } function getNameByProtocol(uint8 _proto) internal pure returns (string memory) { if (_proto == 0) { return "MCD_SHIFTER"; } else if (_proto == 1) { return "COMP_SHIFTER"; } } function getFee(uint _amount, address _tokenAddr, address _proxy) internal returns (uint feeAmount) { uint fee = 400; DSProxyInterface proxy = DSProxyInterface(payable(_proxy)); address user = proxy.owner(); if (Discount(DISCOUNT_ADDR).isCustomFeeSet(user)) { fee = Discount(DISCOUNT_ADDR).getCustomServiceFee(user); } feeAmount = (fee == 0) ? 0 : (_amount / fee); // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } if (_tokenAddr == ETH_ADDRESS) { WALLET_ADDR.transfer(feeAmount); } else { ERC20(_tokenAddr).safeTransfer(WALLET_ADDR, feeAmount); } } receive() external override(FlashLoanReceiverBase, SaverExchangeCore) payable {} } contract LoanShifterTaker is AdminAuth, ProxyPermission, GasBurner { ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; address public constant MCD_SUB_ADDRESS = 0xC45d4f6B6bf41b6EdAA58B01c4298B8d9078269a; address public constant COMPOUND_SUB_ADDRESS = 0x52015EFFD577E08f498a0CCc11905925D58D6207; address public constant MANAGER_ADDRESS = 0x5ef30b9986345249bc32d8928B7ee64DE9435E39; address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; Manager public constant manager = Manager(MANAGER_ADDRESS); ShifterRegistry public constant shifterRegistry = ShifterRegistry(0x597C52281b31B9d949a9D8fEbA08F7A2530a965e); enum Protocols { MCD, COMPOUND } enum SwapType { NO_SWAP, COLL_SWAP, DEBT_SWAP } enum Unsub { NO_UNSUB, FIRST_UNSUB, SECOND_UNSUB, BOTH_UNSUB } struct LoanShiftData { Protocols fromProtocol; Protocols toProtocol; SwapType swapType; Unsub unsub; bool wholeDebt; uint collAmount; uint debtAmount; address debtAddr1; address debtAddr2; address addrLoan1; address addrLoan2; uint id1; uint id2; } /// @notice Main entry point, it will move or transform a loan /// @dev Called through DSProxy function moveLoan( SaverExchangeCore.ExchangeData memory _exchangeData, LoanShiftData memory _loanShift ) public payable burnGas(20) { if (_isSameTypeVaults(_loanShift)) { _forkVault(_loanShift); logEvent(_exchangeData, _loanShift); return; } _callCloseAndOpen(_exchangeData, _loanShift); } //////////////////////// INTERNAL FUNCTIONS ////////////////////////// function _callCloseAndOpen( SaverExchangeCore.ExchangeData memory _exchangeData, LoanShiftData memory _loanShift ) internal { address protoAddr = shifterRegistry.getAddr(getNameByProtocol(uint8(_loanShift.fromProtocol))); if (_loanShift.wholeDebt) { _loanShift.debtAmount = ILoanShifter(protoAddr).getLoanAmount(_loanShift.id1, _loanShift.debtAddr1); } ( uint[8] memory numData, address[8] memory addrData, uint8[3] memory enumData, bytes memory callData ) = _packData(_loanShift, _exchangeData); // encode data bytes memory paramsData = abi.encode(numData, addrData, enumData, callData, address(this)); address payable loanShifterReceiverAddr = payable(shifterRegistry.getAddr("LOAN_SHIFTER_RECEIVER")); loanShifterReceiverAddr.transfer(address(this).balance); // call FL givePermission(loanShifterReceiverAddr); lendingPool.flashLoan(loanShifterReceiverAddr, getLoanAddr(_loanShift.debtAddr1, _loanShift.fromProtocol), _loanShift.debtAmount, paramsData); removePermission(loanShifterReceiverAddr); unsubFromAutomation( _loanShift.unsub, _loanShift.id1, _loanShift.id2, _loanShift.fromProtocol, _loanShift.toProtocol ); logEvent(_exchangeData, _loanShift); } function _forkVault(LoanShiftData memory _loanShift) internal { // Create new Vault to move to if (_loanShift.id2 == 0) { _loanShift.id2 = manager.open(manager.ilks(_loanShift.id1), address(this)); } if (_loanShift.wholeDebt) { manager.shift(_loanShift.id1, _loanShift.id2); } } function _isSameTypeVaults(LoanShiftData memory _loanShift) internal pure returns (bool) { return _loanShift.fromProtocol == Protocols.MCD && _loanShift.toProtocol == Protocols.MCD && _loanShift.addrLoan1 == _loanShift.addrLoan2; } function getNameByProtocol(uint8 _proto) internal pure returns (string memory) { if (_proto == 0) { return "MCD_SHIFTER"; } else if (_proto == 1) { return "COMP_SHIFTER"; } } function getLoanAddr(address _address, Protocols _fromProtocol) internal returns (address) { if (_fromProtocol == Protocols.COMPOUND) { return CTokenInterface(_address).underlying(); } else if (_fromProtocol == Protocols.MCD) { return DAI_ADDRESS; } else { return address(0); } } function logEvent( SaverExchangeCore.ExchangeData memory _exchangeData, LoanShiftData memory _loanShift ) internal { address srcAddr = _exchangeData.srcAddr; address destAddr = _exchangeData.destAddr; uint collAmount = _exchangeData.srcAmount; uint debtAmount = _exchangeData.destAmount; if (_loanShift.swapType == SwapType.NO_SWAP) { srcAddr = _loanShift.addrLoan1; destAddr = _loanShift.debtAddr1; collAmount = _loanShift.collAmount; debtAmount = _loanShift.debtAmount; } DefisaverLogger(DEFISAVER_LOGGER) .Log(address(this), msg.sender, "LoanShifter", abi.encode( _loanShift.fromProtocol, _loanShift.toProtocol, _loanShift.swapType, srcAddr, destAddr, collAmount, debtAmount )); } function unsubFromAutomation(Unsub _unsub, uint _cdp1, uint _cdp2, Protocols _from, Protocols _to) internal { if (_unsub != Unsub.NO_UNSUB) { if (_unsub == Unsub.FIRST_UNSUB || _unsub == Unsub.BOTH_UNSUB) { unsubscribe(_cdp1, _from); } if (_unsub == Unsub.SECOND_UNSUB || _unsub == Unsub.BOTH_UNSUB) { unsubscribe(_cdp2, _to); } } } function unsubscribe(uint _cdpId, Protocols _protocol) internal { if (_cdpId != 0 && _protocol == Protocols.MCD) { IMCDSubscriptions(MCD_SUB_ADDRESS).unsubscribe(_cdpId); } if (_protocol == Protocols.COMPOUND) { ICompoundSubscriptions(COMPOUND_SUB_ADDRESS).unsubscribe(); } } function _packData( LoanShiftData memory _loanShift, SaverExchangeCore.ExchangeData memory exchangeData ) internal pure returns (uint[8] memory numData, address[8] memory addrData, uint8[3] memory enumData, bytes memory callData) { numData = [ _loanShift.collAmount, _loanShift.debtAmount, _loanShift.id1, _loanShift.id2, exchangeData.srcAmount, exchangeData.destAmount, exchangeData.minPrice, exchangeData.price0x ]; addrData = [ _loanShift.addrLoan1, _loanShift.addrLoan2, _loanShift.debtAddr1, _loanShift.debtAddr2, exchangeData.srcAddr, exchangeData.destAddr, exchangeData.exchangeAddr, exchangeData.wrapper ]; enumData = [ uint8(_loanShift.fromProtocol), uint8(_loanShift.toProtocol), uint8(_loanShift.swapType) ]; callData = exchangeData.callData; } } contract CompShifter is CompoundSaverHelper { using SafeERC20 for ERC20; address public constant COMPTROLLER_ADDR = 0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B; function getLoanAmount(uint _cdpId, address _joinAddr) public returns(uint loanAmount) { return getWholeDebt(_cdpId, _joinAddr); } function getWholeDebt(uint _cdpId, address _joinAddr) public returns(uint loanAmount) { return CTokenInterface(_joinAddr).borrowBalanceCurrent(msg.sender); } function close( address _cCollAddr, address _cBorrowAddr, uint _collAmount, uint _debtAmount ) public { address collAddr = getUnderlyingAddr(_cCollAddr); // payback debt paybackDebt(_debtAmount, _cBorrowAddr, getUnderlyingAddr(_cBorrowAddr), tx.origin); require(CTokenInterface(_cCollAddr).redeemUnderlying(_collAmount) == 0); // Send back money to repay FL if (collAddr == ETH_ADDRESS) { msg.sender.transfer(address(this).balance); } else { ERC20(collAddr).safeTransfer(msg.sender, ERC20(collAddr).balanceOf(address(this))); } } function changeDebt( address _cBorrowAddrOld, address _cBorrowAddrNew, uint _debtAmountOld, uint _debtAmountNew ) public { address borrowAddrNew = getUnderlyingAddr(_cBorrowAddrNew); // payback debt in one token paybackDebt(_debtAmountOld, _cBorrowAddrOld, getUnderlyingAddr(_cBorrowAddrOld), tx.origin); // draw debt in another one borrowCompound(_cBorrowAddrNew, _debtAmountNew); // Send back money to repay FL if (borrowAddrNew == ETH_ADDRESS) { msg.sender.transfer(address(this).balance); } else { ERC20(borrowAddrNew).safeTransfer(msg.sender, ERC20(borrowAddrNew).balanceOf(address(this))); } } function open( address _cCollAddr, address _cBorrowAddr, uint _debtAmount ) public { address collAddr = getUnderlyingAddr(_cCollAddr); address borrowAddr = getUnderlyingAddr(_cBorrowAddr); uint collAmount = 0; if (collAddr == ETH_ADDRESS) { collAmount = address(this).balance; } else { collAmount = ERC20(collAddr).balanceOf(address(this)); } depositCompound(collAddr, _cCollAddr, collAmount); // draw debt borrowCompound(_cBorrowAddr, _debtAmount); // Send back money to repay FL if (borrowAddr == ETH_ADDRESS) { msg.sender.transfer(address(this).balance); } else { ERC20(borrowAddr).safeTransfer(msg.sender, ERC20(borrowAddr).balanceOf(address(this))); } } function repayAll(address _cTokenAddr) public { address tokenAddr = getUnderlyingAddr(_cTokenAddr); uint amount = ERC20(tokenAddr).balanceOf(address(this)); if (amount != 0) { paybackDebt(amount, _cTokenAddr, tokenAddr, tx.origin); } } function depositCompound(address _tokenAddr, address _cTokenAddr, uint _amount) internal { approveCToken(_tokenAddr, _cTokenAddr); enterMarket(_cTokenAddr); if (_tokenAddr != ETH_ADDRESS) { require(CTokenInterface(_cTokenAddr).mint(_amount) == 0, "mint error"); } else { CEtherInterface(_cTokenAddr).mint{value: _amount}(); } } function borrowCompound(address _cTokenAddr, uint _amount) internal { enterMarket(_cTokenAddr); require(CTokenInterface(_cTokenAddr).borrow(_amount) == 0); } function enterMarket(address _cTokenAddr) public { address[] memory markets = new address[](1); markets[0] = _cTokenAddr; ComptrollerInterface(COMPTROLLER_ADDR).enterMarkets(markets); } } contract McdShifter is MCDSaverProxy { using SafeERC20 for ERC20; address public constant OPEN_PROXY_ACTIONS = 0x6d0984E80a86f26c0dd564ca0CF74a8E9Da03305; function getLoanAmount(uint _cdpId, address _joinAddr) public view virtual returns(uint loanAmount) { bytes32 ilk = manager.ilks(_cdpId); (, uint rate,,,) = vat.ilks(ilk); (, uint art) = vat.urns(ilk, manager.urns(_cdpId)); uint dai = vat.dai(manager.urns(_cdpId)); uint rad = sub(mul(art, rate), dai); loanAmount = rad / RAY; loanAmount = mul(loanAmount, RAY) < rad ? loanAmount + 1 : loanAmount; } function close( uint _cdpId, address _joinAddr, uint _loanAmount, uint _collateral ) public { address owner = getOwner(manager, _cdpId); bytes32 ilk = manager.ilks(_cdpId); (uint maxColl, ) = getCdpInfo(manager, _cdpId, ilk); // repay dai debt cdp paybackDebt(_cdpId, ilk, _loanAmount, owner); maxColl = _collateral > maxColl ? maxColl : _collateral; // withdraw collateral from cdp drawCollateral(_cdpId, _joinAddr, maxColl); // send back to msg.sender if (isEthJoinAddr(_joinAddr)) { msg.sender.transfer(address(this).balance); } else { ERC20 collToken = ERC20(getCollateralAddr(_joinAddr)); collToken.safeTransfer(msg.sender, collToken.balanceOf(address(this))); } } function open( uint _cdpId, address _joinAddr, uint _debtAmount ) public { uint collAmount = 0; if (isEthJoinAddr(_joinAddr)) { collAmount = address(this).balance; } else { collAmount = ERC20(address(Join(_joinAddr).gem())).balanceOf(address(this)); } if (_cdpId == 0) { openAndWithdraw(collAmount, _debtAmount, address(this), _joinAddr); } else { // add collateral addCollateral(_cdpId, _joinAddr, collAmount); // draw debt drawDai(_cdpId, manager.ilks(_cdpId), _debtAmount); } // transfer to repay FL ERC20(DAI_ADDRESS).transfer(msg.sender, ERC20(DAI_ADDRESS).balanceOf(address(this))); if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } } function openAndWithdraw(uint _collAmount, uint _debtAmount, address _proxy, address _joinAddrTo) internal { bytes32 ilk = Join(_joinAddrTo).ilk(); if (isEthJoinAddr(_joinAddrTo)) { MCDCreateProxyActions(OPEN_PROXY_ACTIONS).openLockETHAndDraw{value: address(this).balance}( address(manager), JUG_ADDRESS, _joinAddrTo, DAI_JOIN_ADDRESS, ilk, _debtAmount, _proxy ); } else { ERC20(getCollateralAddr(_joinAddrTo)).approve(OPEN_PROXY_ACTIONS, uint256(-1)); MCDCreateProxyActions(OPEN_PROXY_ACTIONS).openLockGemAndDraw( address(manager), JUG_ADDRESS, _joinAddrTo, DAI_JOIN_ADDRESS, ilk, _collAmount, _debtAmount, true, _proxy ); } } } contract AaveSaverProxy is GasBurner, SaverExchangeCore, AaveHelper { address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; uint public constant VARIABLE_RATE = 2; function repay(ExchangeData memory _data, uint _gasCost) public payable burnGas(20) { address lendingPoolCore = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); address payable user = payable(getUserAddress()); // redeem collateral address aTokenCollateral = ILendingPool(lendingPoolCore).getReserveATokenAddress(_data.srcAddr); // uint256 maxCollateral = IAToken(aTokenCollateral).balanceOf(address(this)); // don't swap more than maxCollateral // _data.srcAmount = _data.srcAmount > maxCollateral ? maxCollateral : _data.srcAmount; IAToken(aTokenCollateral).redeem(_data.srcAmount); uint256 destAmount = _data.srcAmount; if (_data.srcAddr != _data.destAddr) { // swap (, destAmount) = _sell(_data); destAmount -= getFee(destAmount, user, _gasCost, _data.destAddr); } else { destAmount -= getGasCost(destAmount, user, _gasCost, _data.destAddr); } // payback if (_data.destAddr == ETH_ADDR) { ILendingPool(lendingPool).repay{value: destAmount}(_data.destAddr, destAmount, payable(address(this))); } else { approveToken(_data.destAddr, lendingPoolCore); ILendingPool(lendingPool).repay(_data.destAddr, destAmount, payable(address(this))); } // first return 0x fee to msg.sender as it is the address that actually sent 0x fee sendContractBalance(ETH_ADDR, tx.origin, min(address(this).balance, msg.value)); // send all leftovers from dest addr to proxy owner sendFullContractBalance(_data.destAddr, user); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "AaveRepay", abi.encode(_data.srcAddr, _data.destAddr, _data.srcAmount, destAmount)); } function boost(ExchangeData memory _data, uint _gasCost) public payable burnGas(20) { address lendingPoolCore = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); (,,,uint256 borrowRateMode,,,,,,bool collateralEnabled) = ILendingPool(lendingPool).getUserReserveData(_data.destAddr, address(this)); address payable user = payable(getUserAddress()); // skipping this check as its too expensive // uint256 maxBorrow = getMaxBoost(_data.srcAddr, _data.destAddr, address(this)); // _data.srcAmount = _data.srcAmount > maxBorrow ? maxBorrow : _data.srcAmount; // borrow amount ILendingPool(lendingPool).borrow(_data.srcAddr, _data.srcAmount, borrowRateMode == 0 ? VARIABLE_RATE : borrowRateMode, AAVE_REFERRAL_CODE); uint256 destAmount; if (_data.destAddr != _data.srcAddr) { _data.srcAmount -= getFee(_data.srcAmount, user, _gasCost, _data.srcAddr); // swap (, destAmount) = _sell(_data); } else { _data.srcAmount -= getGasCost(_data.srcAmount, user, _gasCost, _data.srcAddr); destAmount = _data.srcAmount; } if (_data.destAddr == ETH_ADDR) { ILendingPool(lendingPool).deposit{value: destAmount}(_data.destAddr, destAmount, AAVE_REFERRAL_CODE); } else { approveToken(_data.destAddr, lendingPoolCore); ILendingPool(lendingPool).deposit(_data.destAddr, destAmount, AAVE_REFERRAL_CODE); } if (!collateralEnabled) { ILendingPool(lendingPool).setUserUseReserveAsCollateral(_data.destAddr, true); } // returning to msg.sender as it is the address that actually sent 0x fee sendContractBalance(ETH_ADDR, tx.origin, min(address(this).balance, msg.value)); // send all leftovers from dest addr to proxy owner sendFullContractBalance(_data.destAddr, user); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "AaveBoost", abi.encode(_data.srcAddr, _data.destAddr, _data.srcAmount, destAmount)); } } contract AaveSaverReceiver is AaveHelper, AdminAuth, SaverExchangeCore { using SafeERC20 for ERC20; address public constant AAVE_SAVER_PROXY = 0xCab7ce9148499E0dD8228c3c8cDb9B56Ac2bb57a; address public constant AAVE_BASIC_PROXY = 0xd042D4E9B4186c545648c7FfFe87125c976D110B; address public constant AETH_ADDRESS = 0x3a3A65aAb0dd2A17E3F1947bA16138cd37d08c04; function callFunction( address sender, Account.Info memory account, bytes memory data ) public { ( bytes memory exchangeDataBytes, uint256 gasCost, bool isRepay, uint256 ethAmount, uint256 txValue, address user, address proxy ) = abi.decode(data, (bytes,uint256,bool,uint256,uint256,address,address)); // withdraw eth TokenInterface(WETH_ADDRESS).withdraw(ethAmount); address lendingPoolCoreAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); // deposit eth on behalf of proxy DSProxy(payable(proxy)).execute{value: ethAmount}(AAVE_BASIC_PROXY, abi.encodeWithSignature("deposit(address,uint256)", ETH_ADDR, ethAmount)); bytes memory functionData = packFunctionCall(exchangeDataBytes, gasCost, isRepay); DSProxy(payable(proxy)).execute{value: txValue}(AAVE_SAVER_PROXY, functionData); // withdraw deposited eth DSProxy(payable(proxy)).execute(AAVE_BASIC_PROXY, abi.encodeWithSignature("withdraw(address,address,uint256,bool)", ETH_ADDR, AETH_ADDRESS, ethAmount, false)); // deposit eth, get weth and return to sender TokenInterface(WETH_ADDRESS).deposit.value(address(this).balance)(); ERC20(WETH_ADDRESS).safeTransfer(proxy, ethAmount+2); } function packFunctionCall(bytes memory _exchangeDataBytes, uint256 _gasCost, bool _isRepay) internal returns (bytes memory) { ExchangeData memory exData = unpackExchangeData(_exchangeDataBytes); bytes memory functionData; if (_isRepay) { functionData = abi.encodeWithSignature("repay((address,address,uint256,uint256,uint256,address,address,bytes,uint256),uint256)", exData, _gasCost); } else { functionData = abi.encodeWithSignature("boost((address,address,uint256,uint256,uint256,address,address,bytes,uint256),uint256)", exData, _gasCost); } return functionData; } /// @dev if contract receive eth, convert it to WETH receive() external override payable { // deposit eth and get weth if (msg.sender == owner) { TokenInterface(WETH_ADDRESS).deposit.value(address(this).balance)(); } } } contract AaveSaverTaker is DydxFlashLoanBase, ProxyPermission, GasBurner, SaverExchangeCore { address public constant WETH_ADDR = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address payable public constant AAVE_RECEIVER = 0x969DfE84ac318531f13B731c7f21af9918802B94; address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; address public constant PROXY_REGISTRY_ADDRESS = 0x4678f0a6958e4D2Bc4F1BAF7Bc52E8F3564f3fE4; function repay(ExchangeData memory _data, uint256 _gasCost) public payable { _flashLoan(_data, _gasCost, true); } function boost(ExchangeData memory _data, uint256 _gasCost) public payable { _flashLoan(_data, _gasCost, false); } /// @notice Starts the process to move users position 1 collateral and 1 borrow /// @dev User must send 2 wei with this transaction function _flashLoan(ExchangeData memory _data, uint _gasCost, bool _isRepay) internal { ISoloMargin solo = ISoloMargin(SOLO_MARGIN_ADDRESS); uint256 ethAmount = ERC20(WETH_ADDR).balanceOf(SOLO_MARGIN_ADDRESS); // Get marketId from token address uint256 marketId = _getMarketIdFromTokenAddress(WETH_ADDR); // Calculate repay amount (_amount + (2 wei)) // Approve transfer from uint256 repayAmount = _getRepaymentAmountInternal(ethAmount); ERC20(WETH_ADDR).approve(SOLO_MARGIN_ADDRESS, repayAmount); Actions.ActionArgs[] memory operations = new Actions.ActionArgs[](3); operations[0] = _getWithdrawAction(marketId, ethAmount, AAVE_RECEIVER); AAVE_RECEIVER.transfer(msg.value); bytes memory encodedData = packExchangeData(_data); operations[1] = _getCallAction( abi.encode(encodedData, _gasCost, _isRepay, ethAmount, msg.value, proxyOwner(), address(this)), AAVE_RECEIVER ); operations[2] = _getDepositAction(marketId, repayAmount, address(this)); Account.Info[] memory accountInfos = new Account.Info[](1); accountInfos[0] = _getAccountInfo(); givePermission(AAVE_RECEIVER); solo.operate(accountInfos, operations); removePermission(AAVE_RECEIVER); } } contract CompoundLoanInfo is CompoundSafetyRatio { struct LoanData { address user; uint128 ratio; address[] collAddr; address[] borrowAddr; uint[] collAmounts; uint[] borrowAmounts; } struct TokenInfo { address cTokenAddress; address underlyingTokenAddress; uint collateralFactor; uint price; } struct TokenInfoFull { address underlyingTokenAddress; uint supplyRate; uint borrowRate; uint exchangeRate; uint marketLiquidity; uint totalSupply; uint totalBorrow; uint collateralFactor; uint price; } address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant CETH_ADDRESS = 0x4Ddc2D193948926D02f9B1fE9e1daa0718270ED5; /// @notice Calcualted the ratio of coll/debt for a compound user /// @param _user Address of the user function getRatio(address _user) public view returns (uint) { // For each asset the account is in return getSafetyRatio(_user); } /// @notice Fetches Compound prices for tokens /// @param _cTokens Arr. of cTokens for which to get the prices /// @return prices Array of prices function getPrices(address[] memory _cTokens) public view returns (uint[] memory prices) { prices = new uint[](_cTokens.length); address oracleAddr = comp.oracle(); for (uint i = 0; i < _cTokens.length; ++i) { prices[i] = CompoundOracleInterface(oracleAddr).getUnderlyingPrice(_cTokens[i]); } } /// @notice Fetches Compound collateral factors for tokens /// @param _cTokens Arr. of cTokens for which to get the coll. factors /// @return collFactors Array of coll. factors function getCollFactors(address[] memory _cTokens) public view returns (uint[] memory collFactors) { collFactors = new uint[](_cTokens.length); for (uint i = 0; i < _cTokens.length; ++i) { (, collFactors[i]) = comp.markets(_cTokens[i]); } } /// @notice Fetches all the collateral/debt address and amounts, denominated in usd /// @param _user Address of the user /// @return data LoanData information function getLoanData(address _user) public view returns (LoanData memory data) { address[] memory assets = comp.getAssetsIn(_user); address oracleAddr = comp.oracle(); data = LoanData({ user: _user, ratio: 0, collAddr: new address[](assets.length), borrowAddr: new address[](assets.length), collAmounts: new uint[](assets.length), borrowAmounts: new uint[](assets.length) }); uint collPos = 0; uint borrowPos = 0; for (uint i = 0; i < assets.length; i++) { address asset = assets[i]; (, uint cTokenBalance, uint borrowBalance, uint exchangeRateMantissa) = CTokenInterface(asset).getAccountSnapshot(_user); Exp memory oraclePrice; if (cTokenBalance != 0 || borrowBalance != 0) { oraclePrice = Exp({mantissa: CompoundOracleInterface(oracleAddr).getUnderlyingPrice(asset)}); } // Sum up collateral in Usd if (cTokenBalance != 0) { Exp memory exchangeRate = Exp({mantissa: exchangeRateMantissa}); (, Exp memory tokensToUsd) = mulExp(exchangeRate, oraclePrice); data.collAddr[collPos] = asset; (, data.collAmounts[collPos]) = mulScalarTruncate(tokensToUsd, cTokenBalance); collPos++; } // Sum up debt in Usd if (borrowBalance != 0) { data.borrowAddr[borrowPos] = asset; (, data.borrowAmounts[borrowPos]) = mulScalarTruncate(oraclePrice, borrowBalance); borrowPos++; } } data.ratio = uint128(getSafetyRatio(_user)); return data; } function getTokenBalances(address _user, address[] memory _cTokens) public view returns (uint[] memory balances, uint[] memory borrows) { balances = new uint[](_cTokens.length); borrows = new uint[](_cTokens.length); for (uint i = 0; i < _cTokens.length; i++) { address asset = _cTokens[i]; (, uint cTokenBalance, uint borrowBalance, uint exchangeRateMantissa) = CTokenInterface(asset).getAccountSnapshot(_user); Exp memory exchangeRate = Exp({mantissa: exchangeRateMantissa}); (, balances[i]) = mulScalarTruncate(exchangeRate, cTokenBalance); borrows[i] = borrowBalance; } } /// @notice Fetches all the collateral/debt address and amounts, denominated in usd /// @param _users Addresses of the user /// @return loans Array of LoanData information function getLoanDataArr(address[] memory _users) public view returns (LoanData[] memory loans) { loans = new LoanData[](_users.length); for (uint i = 0; i < _users.length; ++i) { loans[i] = getLoanData(_users[i]); } } /// @notice Calcualted the ratio of coll/debt for a compound user /// @param _users Addresses of the user /// @return ratios Array of ratios function getRatios(address[] memory _users) public view returns (uint[] memory ratios) { ratios = new uint[](_users.length); for (uint i = 0; i < _users.length; ++i) { ratios[i] = getSafetyRatio(_users[i]); } } /// @notice Information about cTokens /// @param _cTokenAddresses Array of cTokens addresses /// @return tokens Array of cTokens infomartion function getTokensInfo(address[] memory _cTokenAddresses) public returns(TokenInfo[] memory tokens) { tokens = new TokenInfo[](_cTokenAddresses.length); address oracleAddr = comp.oracle(); for (uint i = 0; i < _cTokenAddresses.length; ++i) { (, uint collFactor) = comp.markets(_cTokenAddresses[i]); tokens[i] = TokenInfo({ cTokenAddress: _cTokenAddresses[i], underlyingTokenAddress: getUnderlyingAddr(_cTokenAddresses[i]), collateralFactor: collFactor, price: CompoundOracleInterface(oracleAddr).getUnderlyingPrice(_cTokenAddresses[i]) }); } } /// @notice Information about cTokens /// @param _cTokenAddresses Array of cTokens addresses /// @return tokens Array of cTokens infomartion function getFullTokensInfo(address[] memory _cTokenAddresses) public returns(TokenInfoFull[] memory tokens) { tokens = new TokenInfoFull[](_cTokenAddresses.length); address oracleAddr = comp.oracle(); for (uint i = 0; i < _cTokenAddresses.length; ++i) { (, uint collFactor) = comp.markets(_cTokenAddresses[i]); CTokenInterface cToken = CTokenInterface(_cTokenAddresses[i]); tokens[i] = TokenInfoFull({ underlyingTokenAddress: getUnderlyingAddr(_cTokenAddresses[i]), supplyRate: cToken.supplyRatePerBlock(), borrowRate: cToken.borrowRatePerBlock(), exchangeRate: cToken.exchangeRateCurrent(), marketLiquidity: cToken.getCash(), totalSupply: cToken.totalSupply(), totalBorrow: cToken.totalBorrowsCurrent(), collateralFactor: collFactor, price: CompoundOracleInterface(oracleAddr).getUnderlyingPrice(_cTokenAddresses[i]) }); } } /// @notice Returns the underlying address of the cToken asset /// @param _cTokenAddress cToken address /// @return Token address of the cToken specified function getUnderlyingAddr(address _cTokenAddress) internal returns (address) { if (_cTokenAddress == CETH_ADDRESS) { return ETH_ADDRESS; } else { return CTokenInterface(_cTokenAddress).underlying(); } } } contract CompLeverage is DFSExchangeCore, CompBalance { address public constant C_COMP_ADDR = 0x70e36f6BF80a52b3B46b3aF8e106CC0ed743E8e4; address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant CETH_ADDRESS = 0x4Ddc2D193948926D02f9B1fE9e1daa0718270ED5; address payable public constant WALLET_ADDR = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; address public constant DISCOUNT_ADDR = 0x1b14E8D511c9A4395425314f849bD737BAF8208F; address public constant COMPTROLLER_ADDR = 0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B; address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); /// @notice Should claim COMP and sell it to the specified token and deposit it back /// @param exchangeData Standard Exchange struct /// @param _cTokensSupply List of cTokens user is supplying /// @param _cTokensBorrow List of cTokens user is borrowing /// @param _cDepositAddr The cToken address of the asset you want to deposit /// @param _inMarket Flag if the cToken is used as collateral function claimAndSell( ExchangeData memory exchangeData, address[] memory _cTokensSupply, address[] memory _cTokensBorrow, address _cDepositAddr, bool _inMarket ) public payable { // Claim COMP token _claim(address(this), _cTokensSupply, _cTokensBorrow); uint compBalance = ERC20(COMP_ADDR).balanceOf(address(this)); uint depositAmount = 0; // Exchange COMP if (exchangeData.srcAddr != address(0)) { exchangeData.dfsFeeDivider = 400; // 0.25% exchangeData.srcAmount = compBalance; (, depositAmount) = _sell(exchangeData); // if we have no deposit after, send back tokens to the user if (_cDepositAddr == address(0)) { if (exchangeData.destAddr != ETH_ADDRESS) { ERC20(exchangeData.destAddr).transfer(msg.sender, depositAmount); } else { msg.sender.transfer(address(this).balance); } } } // Deposit back a token if (_cDepositAddr != address(0)) { // if we are just depositing COMP without a swap if (_cDepositAddr == C_COMP_ADDR) { depositAmount = compBalance; } address tokenAddr = getUnderlyingAddr(_cDepositAddr); deposit(tokenAddr, _cDepositAddr, depositAmount, _inMarket); } logger.Log(address(this), msg.sender, "CompLeverage", abi.encode(compBalance, depositAmount, _cDepositAddr, exchangeData.destAmount)); } function getUnderlyingAddr(address _cTokenAddress) internal returns (address) { if (_cTokenAddress == CETH_ADDRESS) { return ETH_ADDRESS; } else { return CTokenInterface(_cTokenAddress).underlying(); } } function deposit(address _tokenAddr, address _cTokenAddr, uint _amount, bool _inMarket) public burnGas(5) payable { approveToken(_tokenAddr, _cTokenAddr); if (!_inMarket) { enterMarket(_cTokenAddr); } if (_tokenAddr != ETH_ADDRESS) { require(CTokenInterface(_cTokenAddr).mint(_amount) == 0); } else { CEtherInterface(_cTokenAddr).mint{value: msg.value}(); // reverts on fail } } function enterMarket(address _cTokenAddr) public { address[] memory markets = new address[](1); markets[0] = _cTokenAddr; ComptrollerInterface(COMPTROLLER_ADDR).enterMarkets(markets); } function approveToken(address _tokenAddr, address _cTokenAddr) internal { if (_tokenAddr != ETH_ADDRESS) { ERC20(_tokenAddr).safeApprove(_cTokenAddr, uint(-1)); } } } contract CompoundCreateReceiver is FlashLoanReceiverBase, SaverExchangeCore { ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); ShifterRegistry public constant shifterRegistry = ShifterRegistry(0x2E82103bD91053C781aaF39da17aE58ceE39d0ab); address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address payable public constant WALLET_ADDR = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; address public constant DISCOUNT_ADDR = 0x1b14E8D511c9A4395425314f849bD737BAF8208F; // solhint-disable-next-line no-empty-blocks constructor() public FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) {} struct CompCreateData { address payable proxyAddr; bytes proxyData; address cCollAddr; address cDebtAddr; } /// @notice Called by Aave when sending back the FL amount /// @param _reserve The address of the borrowed token /// @param _amount Amount of FL tokens received /// @param _fee FL Aave fee /// @param _params The params that are sent from the original FL caller contract function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { // Format the call data for DSProxy (CompCreateData memory compCreate, ExchangeData memory exchangeData) = packFunctionCall(_amount, _fee, _params); address leveragedAsset = _reserve; // If the assets are different if (compCreate.cCollAddr != compCreate.cDebtAddr) { (, uint sellAmount) = _sell(exchangeData); getFee(sellAmount, exchangeData.destAddr, compCreate.proxyAddr); leveragedAsset = exchangeData.destAddr; } // Send amount to DSProxy sendToProxy(compCreate.proxyAddr, leveragedAsset); address compOpenProxy = shifterRegistry.getAddr("COMP_SHIFTER"); // Execute the DSProxy call DSProxyInterface(compCreate.proxyAddr).execute(compOpenProxy, compCreate.proxyData); // Repay the loan with the money DSProxy sent back transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { // solhint-disable-next-line avoid-tx-origin tx.origin.transfer(address(this).balance); } } /// @notice Formats function data call so we can call it through DSProxy /// @param _amount Amount of FL /// @param _fee Fee of the FL /// @param _params Saver proxy params function packFunctionCall(uint _amount, uint _fee, bytes memory _params) internal pure returns (CompCreateData memory compCreate, ExchangeData memory exchangeData) { ( uint[4] memory numData, // srcAmount, destAmount, minPrice, price0x address[6] memory cAddresses, // cCollAddr, cDebtAddr, srcAddr, destAddr, exchangeAddr, wrapper bytes memory callData, address proxy ) = abi.decode(_params, (uint256[4],address[6],bytes,address)); bytes memory proxyData = abi.encodeWithSignature( "open(address,address,uint256)", cAddresses[0], cAddresses[1], (_amount + _fee)); exchangeData = SaverExchangeCore.ExchangeData({ srcAddr: cAddresses[2], destAddr: cAddresses[3], srcAmount: numData[0], destAmount: numData[1], minPrice: numData[2], wrapper: cAddresses[5], exchangeAddr: cAddresses[4], callData: callData, price0x: numData[3] }); compCreate = CompCreateData({ proxyAddr: payable(proxy), proxyData: proxyData, cCollAddr: cAddresses[0], cDebtAddr: cAddresses[1] }); return (compCreate, exchangeData); } /// @notice Send the FL funds received to DSProxy /// @param _proxy DSProxy address /// @param _reserve Token address function sendToProxy(address payable _proxy, address _reserve) internal { if (_reserve != ETH_ADDRESS) { ERC20(_reserve).safeTransfer(_proxy, ERC20(_reserve).balanceOf(address(this))); } else { _proxy.transfer(address(this).balance); } } function getFee(uint _amount, address _tokenAddr, address _proxy) internal returns (uint feeAmount) { uint fee = 400; DSProxy proxy = DSProxy(payable(_proxy)); address user = proxy.owner(); if (Discount(DISCOUNT_ADDR).isCustomFeeSet(user)) { fee = Discount(DISCOUNT_ADDR).getCustomServiceFee(user); } feeAmount = (fee == 0) ? 0 : (_amount / fee); // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } if (_tokenAddr == ETH_ADDRESS) { WALLET_ADDR.transfer(feeAmount); } else { ERC20(_tokenAddr).safeTransfer(WALLET_ADDR, feeAmount); } } // solhint-disable-next-line no-empty-blocks receive() external override(FlashLoanReceiverBase, SaverExchangeCore) payable {} } contract CompoundSaverFlashLoan is FlashLoanReceiverBase, SaverExchangeCore { ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); address payable public COMPOUND_SAVER_FLASH_PROXY = 0xcEAb38B5C88F33Dabe4D31BDD384E08215526632; address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public owner; using SafeERC20 for ERC20; constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public { owner = msg.sender; } /// @notice Called by Aave when sending back the FL amount /// @param _reserve The address of the borrowed token /// @param _amount Amount of FL tokens received /// @param _fee FL Aave fee /// @param _params The params that are sent from the original FL caller contract function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { // Format the call data for DSProxy (bytes memory proxyData, address payable proxyAddr) = packFunctionCall(_amount, _fee, _params); // Send Flash loan amount to DSProxy sendLoanToProxy(proxyAddr, _reserve, _amount); // Execute the DSProxy call DSProxyInterface(proxyAddr).execute(COMPOUND_SAVER_FLASH_PROXY, proxyData); // Repay the loan with the money DSProxy sent back transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } } /// @notice Formats function data call so we can call it through DSProxy /// @param _amount Amount of FL /// @param _fee Fee of the FL /// @param _params Saver proxy params /// @return proxyData Formated function call data function packFunctionCall(uint _amount, uint _fee, bytes memory _params) internal pure returns (bytes memory proxyData, address payable) { ( bytes memory exDataBytes, address[2] memory cAddresses, // cCollAddress, cBorrowAddress uint256 gasCost, bool isRepay, address payable proxyAddr ) = abi.decode(_params, (bytes,address[2],uint256,bool,address)); ExchangeData memory _exData = unpackExchangeData(exDataBytes); uint[2] memory flashLoanData = [_amount, _fee]; if (isRepay) { proxyData = abi.encodeWithSignature("flashRepay((address,address,uint256,uint256,uint256,address,address,bytes,uint256),address[2],uint256,uint256[2])", _exData, cAddresses, gasCost, flashLoanData); } else { proxyData = abi.encodeWithSignature("flashBoost((address,address,uint256,uint256,uint256,address,address,bytes,uint256),address[2],uint256,uint256[2])", _exData, cAddresses, gasCost, flashLoanData); } return (proxyData, proxyAddr); } /// @notice Send the FL funds received to DSProxy /// @param _proxy DSProxy address /// @param _reserve Token address /// @param _amount Amount of tokens function sendLoanToProxy(address payable _proxy, address _reserve, uint _amount) internal { if (_reserve != ETH_ADDRESS) { ERC20(_reserve).safeTransfer(_proxy, _amount); } _proxy.transfer(address(this).balance); } receive() external override(SaverExchangeCore, FlashLoanReceiverBase) payable {} } contract CompoundSaverFlashProxy is SaverExchangeCore, CompoundSaverHelper { address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; using SafeERC20 for ERC20; /// @notice Repays the position and sends tokens back for FL /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress] /// @param _gasCost Gas cost for transaction /// @param _flashLoanData Data about FL [amount, fee] function flashRepay( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost, uint[2] memory _flashLoanData // amount, fee ) public payable { enterMarket(_cAddresses[0], _cAddresses[1]); address payable user = payable(getUserAddress()); uint flashBorrowed = _flashLoanData[0] + _flashLoanData[1]; uint maxColl = getMaxCollateral(_cAddresses[0], address(this)); // draw max coll require(CTokenInterface(_cAddresses[0]).redeemUnderlying(maxColl) == 0); address collToken = getUnderlyingAddr(_cAddresses[0]); address borrowToken = getUnderlyingAddr(_cAddresses[1]); uint swapAmount = 0; if (collToken != borrowToken) { // swap max coll + loanAmount _exData.srcAmount = maxColl + _flashLoanData[0]; (,swapAmount) = _sell(_exData); // get fee swapAmount -= getFee(swapAmount, user, _gasCost, _cAddresses[1]); } else { swapAmount = (maxColl + _flashLoanData[0]); swapAmount -= getGasCost(swapAmount, _gasCost, _cAddresses[1]); } // payback debt paybackDebt(swapAmount, _cAddresses[1], borrowToken, user); // draw collateral for loanAmount + loanFee require(CTokenInterface(_cAddresses[0]).redeemUnderlying(flashBorrowed) == 0); // repay flash loan returnFlashLoan(collToken, flashBorrowed); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "CompoundRepay", abi.encode(_exData.srcAmount, swapAmount, collToken, borrowToken)); } /// @notice Boosts the position and sends tokens back for FL /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress] /// @param _gasCost Gas cost for specific transaction /// @param _flashLoanData Data about FL [amount, fee] function flashBoost( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost, uint[2] memory _flashLoanData // amount, fee ) public payable { enterMarket(_cAddresses[0], _cAddresses[1]); address payable user = payable(getUserAddress()); uint flashBorrowed = _flashLoanData[0] + _flashLoanData[1]; // borrow max amount uint borrowAmount = getMaxBorrow(_cAddresses[1], address(this)); require(CTokenInterface(_cAddresses[1]).borrow(borrowAmount) == 0); address collToken = getUnderlyingAddr(_cAddresses[0]); address borrowToken = getUnderlyingAddr(_cAddresses[1]); uint swapAmount = 0; if (collToken != borrowToken) { // get dfs fee borrowAmount -= getFee((borrowAmount + _flashLoanData[0]), user, _gasCost, _cAddresses[1]); _exData.srcAmount = (borrowAmount + _flashLoanData[0]); (,swapAmount) = _sell(_exData); } else { swapAmount = (borrowAmount + _flashLoanData[0]); swapAmount -= getGasCost(swapAmount, _gasCost, _cAddresses[1]); } // deposit swaped collateral depositCollateral(collToken, _cAddresses[0], swapAmount); // borrow token to repay flash loan require(CTokenInterface(_cAddresses[1]).borrow(flashBorrowed) == 0); // repay flash loan returnFlashLoan(borrowToken, flashBorrowed); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "CompoundBoost", abi.encode(_exData.srcAmount, swapAmount, collToken, borrowToken)); } /// @notice Helper method to deposit tokens in Compound /// @param _collToken Token address of the collateral /// @param _cCollToken CToken address of the collateral /// @param _depositAmount Amount to deposit function depositCollateral(address _collToken, address _cCollToken, uint _depositAmount) internal { approveCToken(_collToken, _cCollToken); if (_collToken != ETH_ADDRESS) { require(CTokenInterface(_cCollToken).mint(_depositAmount) == 0); } else { CEtherInterface(_cCollToken).mint{value: _depositAmount}(); // reverts on fail } } /// @notice Returns the tokens/ether to the msg.sender which is the FL contract /// @param _tokenAddr Address of token which we return /// @param _amount Amount to return function returnFlashLoan(address _tokenAddr, uint _amount) internal { if (_tokenAddr != ETH_ADDRESS) { ERC20(_tokenAddr).safeTransfer(msg.sender, _amount); } msg.sender.transfer(address(this).balance); } } contract CompoundSaverProxy is CompoundSaverHelper, SaverExchangeCore { DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); /// @notice Withdraws collateral, converts to borrowed token and repays debt /// @dev Called through the DSProxy /// @param _exData Exchange data /// @param _cAddresses Coll/Debt addresses [cCollAddress, cBorrowAddress] /// @param _gasCost Gas cost for specific transaction function repay( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost ) public payable { enterMarket(_cAddresses[0], _cAddresses[1]); address payable user = payable(getUserAddress()); uint maxColl = getMaxCollateral(_cAddresses[0], address(this)); uint collAmount = (_exData.srcAmount > maxColl) ? maxColl : _exData.srcAmount; require(CTokenInterface(_cAddresses[0]).redeemUnderlying(collAmount) == 0); address collToken = getUnderlyingAddr(_cAddresses[0]); address borrowToken = getUnderlyingAddr(_cAddresses[1]); uint swapAmount = 0; if (collToken != borrowToken) { _exData.srcAmount = collAmount; (, swapAmount) = _sell(_exData); swapAmount -= getFee(swapAmount, user, _gasCost, _cAddresses[1]); } else { swapAmount = collAmount; swapAmount -= getGasCost(swapAmount, _gasCost, _cAddresses[1]); } paybackDebt(swapAmount, _cAddresses[1], borrowToken, user); // handle 0x fee tx.origin.transfer(address(this).balance); // log amount, collToken, borrowToken logger.Log(address(this), msg.sender, "CompoundRepay", abi.encode(_exData.srcAmount, swapAmount, collToken, borrowToken)); } /// @notice Borrows token, converts to collateral, and adds to position /// @dev Called through the DSProxy /// @param _exData Exchange data /// @param _cAddresses Coll/Debt addresses [cCollAddress, cBorrowAddress] /// @param _gasCost Gas cost for specific transaction function boost( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost ) public payable { enterMarket(_cAddresses[0], _cAddresses[1]); address payable user = payable(getUserAddress()); uint maxBorrow = getMaxBorrow(_cAddresses[1], address(this)); uint borrowAmount = (_exData.srcAmount > maxBorrow) ? maxBorrow : _exData.srcAmount; require(CTokenInterface(_cAddresses[1]).borrow(borrowAmount) == 0); address collToken = getUnderlyingAddr(_cAddresses[0]); address borrowToken = getUnderlyingAddr(_cAddresses[1]); uint swapAmount = 0; if (collToken != borrowToken) { borrowAmount -= getFee(borrowAmount, user, _gasCost, _cAddresses[1]); _exData.srcAmount = borrowAmount; (,swapAmount) = _sell(_exData); } else { swapAmount = borrowAmount; swapAmount -= getGasCost(swapAmount, _gasCost, _cAddresses[1]); } approveCToken(collToken, _cAddresses[0]); if (collToken != ETH_ADDRESS) { require(CTokenInterface(_cAddresses[0]).mint(swapAmount) == 0); } else { CEtherInterface(_cAddresses[0]).mint{value: swapAmount}(); // reverts on fail } // handle 0x fee tx.origin.transfer(address(this).balance); // log amount, collToken, borrowToken logger.Log(address(this), msg.sender, "CompoundBoost", abi.encode(_exData.srcAmount, swapAmount, collToken, borrowToken)); } } contract CreamSaverFlashLoan is FlashLoanReceiverBase, SaverExchangeCore { ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); address payable public COMPOUND_SAVER_FLASH_PROXY = 0x1e012554891d271eDc80ba8eB146EA5FF596fA51; address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public owner; using SafeERC20 for ERC20; constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public { owner = msg.sender; } /// @notice Called by Aave when sending back the FL amount /// @param _reserve The address of the borrowed token /// @param _amount Amount of FL tokens received /// @param _fee FL Aave fee /// @param _params The params that are sent from the original FL caller contract function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { // Format the call data for DSProxy (bytes memory proxyData, address payable proxyAddr) = packFunctionCall(_amount, _fee, _params); // Send Flash loan amount to DSProxy sendLoanToProxy(proxyAddr, _reserve, _amount); // Execute the DSProxy call DSProxyInterface(proxyAddr).execute(COMPOUND_SAVER_FLASH_PROXY, proxyData); // Repay the loan with the money DSProxy sent back transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } } /// @notice Formats function data call so we can call it through DSProxy /// @param _amount Amount of FL /// @param _fee Fee of the FL /// @param _params Saver proxy params /// @return proxyData Formated function call data function packFunctionCall(uint _amount, uint _fee, bytes memory _params) internal pure returns (bytes memory proxyData, address payable) { ( bytes memory exDataBytes, address[2] memory cAddresses, // cCollAddress, cBorrowAddress uint256 gasCost, bool isRepay, address payable proxyAddr ) = abi.decode(_params, (bytes,address[2],uint256,bool,address)); ExchangeData memory _exData = unpackExchangeData(exDataBytes); uint[2] memory flashLoanData = [_amount, _fee]; if (isRepay) { proxyData = abi.encodeWithSignature("flashRepay((address,address,uint256,uint256,uint256,address,address,bytes,uint256),address[2],uint256,uint256[2])", _exData, cAddresses, gasCost, flashLoanData); } else { proxyData = abi.encodeWithSignature("flashBoost((address,address,uint256,uint256,uint256,address,address,bytes,uint256),address[2],uint256,uint256[2])", _exData, cAddresses, gasCost, flashLoanData); } return (proxyData, proxyAddr); } /// @notice Send the FL funds received to DSProxy /// @param _proxy DSProxy address /// @param _reserve Token address /// @param _amount Amount of tokens function sendLoanToProxy(address payable _proxy, address _reserve, uint _amount) internal { if (_reserve != ETH_ADDRESS) { ERC20(_reserve).safeTransfer(_proxy, _amount); } _proxy.transfer(address(this).balance); } receive() external override(SaverExchangeCore, FlashLoanReceiverBase) payable {} } contract CreamSaverFlashProxy is SaverExchangeCore, CreamSaverHelper { address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; using SafeERC20 for ERC20; /// @notice Repays the position and sends tokens back for FL /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress] /// @param _gasCost Gas cost for transaction /// @param _flashLoanData Data about FL [amount, fee] function flashRepay( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost, uint[2] memory _flashLoanData // amount, fee ) public payable { enterMarket(_cAddresses[0], _cAddresses[1]); address payable user = payable(getUserAddress()); uint flashBorrowed = _flashLoanData[0] + _flashLoanData[1]; uint maxColl = getMaxCollateral(_cAddresses[0], address(this)); // draw max coll require(CTokenInterface(_cAddresses[0]).redeemUnderlying(maxColl) == 0); address collToken = getUnderlyingAddr(_cAddresses[0]); address borrowToken = getUnderlyingAddr(_cAddresses[1]); uint swapAmount = 0; if (collToken != borrowToken) { // swap max coll + loanAmount _exData.srcAmount = maxColl + _flashLoanData[0]; (,swapAmount) = _sell(_exData); // get fee swapAmount -= getFee(swapAmount, user, _gasCost, _cAddresses[1]); } else { swapAmount = (maxColl + _flashLoanData[0]); swapAmount -= getGasCost(swapAmount, _gasCost, _cAddresses[1]); } // payback debt paybackDebt(swapAmount, _cAddresses[1], borrowToken, user); // draw collateral for loanAmount + loanFee require(CTokenInterface(_cAddresses[0]).redeemUnderlying(flashBorrowed) == 0); // repay flash loan returnFlashLoan(collToken, flashBorrowed); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "CreamRepay", abi.encode(_exData.srcAmount, swapAmount, collToken, borrowToken)); } /// @notice Boosts the position and sends tokens back for FL /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress] /// @param _gasCost Gas cost for specific transaction /// @param _flashLoanData Data about FL [amount, fee] function flashBoost( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost, uint[2] memory _flashLoanData // amount, fee ) public payable { enterMarket(_cAddresses[0], _cAddresses[1]); address payable user = payable(getUserAddress()); uint flashBorrowed = _flashLoanData[0] + _flashLoanData[1]; // borrow max amount uint borrowAmount = getMaxBorrow(_cAddresses[1], address(this)); require(CTokenInterface(_cAddresses[1]).borrow(borrowAmount) == 0); address collToken = getUnderlyingAddr(_cAddresses[0]); address borrowToken = getUnderlyingAddr(_cAddresses[1]); uint swapAmount = 0; if (collToken != borrowToken) { // get dfs fee borrowAmount -= getFee((borrowAmount + _flashLoanData[0]), user, _gasCost, _cAddresses[1]); _exData.srcAmount = (borrowAmount + _flashLoanData[0]); (,swapAmount) = _sell(_exData); } else { swapAmount = (borrowAmount + _flashLoanData[0]); swapAmount -= getGasCost(swapAmount, _gasCost, _cAddresses[1]); } // deposit swaped collateral depositCollateral(collToken, _cAddresses[0], swapAmount); // borrow token to repay flash loan require(CTokenInterface(_cAddresses[1]).borrow(flashBorrowed) == 0); // repay flash loan returnFlashLoan(borrowToken, flashBorrowed); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "CreamBoost", abi.encode(_exData.srcAmount, swapAmount, collToken, borrowToken)); } /// @notice Helper method to deposit tokens in Compound /// @param _collToken Token address of the collateral /// @param _cCollToken CToken address of the collateral /// @param _depositAmount Amount to deposit function depositCollateral(address _collToken, address _cCollToken, uint _depositAmount) internal { approveCToken(_collToken, _cCollToken); if (_collToken != ETH_ADDRESS) { require(CTokenInterface(_cCollToken).mint(_depositAmount) == 0); } else { CEtherInterface(_cCollToken).mint{value: _depositAmount}(); // reverts on fail } } /// @notice Returns the tokens/ether to the msg.sender which is the FL contract /// @param _tokenAddr Address of token which we return /// @param _amount Amount to return function returnFlashLoan(address _tokenAddr, uint _amount) internal { if (_tokenAddr != ETH_ADDRESS) { ERC20(_tokenAddr).safeTransfer(msg.sender, _amount); } msg.sender.transfer(address(this).balance); } } contract CreamSaverProxy is CreamSaverHelper, SaverExchangeCore { DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); /// @notice Withdraws collateral, converts to borrowed token and repays debt /// @dev Called through the DSProxy /// @param _exData Exchange data /// @param _cAddresses Coll/Debt addresses [cCollAddress, cBorrowAddress] /// @param _gasCost Gas cost for specific transaction function repay( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost ) public payable { enterMarket(_cAddresses[0], _cAddresses[1]); address payable user = payable(getUserAddress()); uint maxColl = getMaxCollateral(_cAddresses[0], address(this)); uint collAmount = (_exData.srcAmount > maxColl) ? maxColl : _exData.srcAmount; require(CTokenInterface(_cAddresses[0]).redeemUnderlying(collAmount) == 0); address collToken = getUnderlyingAddr(_cAddresses[0]); address borrowToken = getUnderlyingAddr(_cAddresses[1]); uint swapAmount = 0; if (collToken != borrowToken) { (, swapAmount) = _sell(_exData); swapAmount -= getFee(swapAmount, user, _gasCost, _cAddresses[1]); } else { swapAmount = collAmount; swapAmount -= getGasCost(swapAmount, _gasCost, _cAddresses[1]); } paybackDebt(swapAmount, _cAddresses[1], borrowToken, user); // handle 0x fee tx.origin.transfer(address(this).balance); // log amount, collToken, borrowToken logger.Log(address(this), msg.sender, "CreamRepay", abi.encode(_exData.srcAmount, swapAmount, collToken, borrowToken)); } /// @notice Borrows token, converts to collateral, and adds to position /// @dev Called through the DSProxy /// @param _exData Exchange data /// @param _cAddresses Coll/Debt addresses [cCollAddress, cBorrowAddress] /// @param _gasCost Gas cost for specific transaction function boost( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost ) public payable { enterMarket(_cAddresses[0], _cAddresses[1]); address payable user = payable(getUserAddress()); uint maxBorrow = getMaxBorrow(_cAddresses[1], address(this)); uint borrowAmount = (_exData.srcAmount > maxBorrow) ? maxBorrow : _exData.srcAmount; require(CTokenInterface(_cAddresses[1]).borrow(borrowAmount) == 0); address collToken = getUnderlyingAddr(_cAddresses[0]); address borrowToken = getUnderlyingAddr(_cAddresses[1]); uint swapAmount = 0; if (collToken != borrowToken) { borrowAmount -= getFee(borrowAmount, user, _gasCost, _cAddresses[1]); _exData.srcAmount = borrowAmount; (,swapAmount) = _sell(_exData); } else { swapAmount = borrowAmount; swapAmount -= getGasCost(swapAmount, _gasCost, _cAddresses[1]); } approveCToken(collToken, _cAddresses[0]); if (collToken != ETH_ADDRESS) { require(CTokenInterface(_cAddresses[0]).mint(swapAmount) == 0); } else { CEtherInterface(_cAddresses[0]).mint{value: swapAmount}(); // reverts on fail } // handle 0x fee tx.origin.transfer(address(this).balance); // log amount, collToken, borrowToken logger.Log(address(this), msg.sender, "CreamBoost", abi.encode(_exData.srcAmount, swapAmount, collToken, borrowToken)); } } contract SaverExchange is SaverExchangeCore, AdminAuth, GasBurner { using SafeERC20 for ERC20; uint256 public constant SERVICE_FEE = 800; // 0.125% Fee // solhint-disable-next-line const-name-snakecase DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); uint public burnAmount = 10; /// @notice Takes a src amount of tokens and converts it into the dest token /// @dev Takes fee from the _srcAmount before the exchange /// @param exData [srcAddr, destAddr, srcAmount, destAmount, minPrice, exchangeType, exchangeAddr, callData, price0x] /// @param _user User address who called the exchange function sell(ExchangeData memory exData, address payable _user) public payable burnGas(burnAmount) { // take fee uint dfsFee = getFee(exData.srcAmount, exData.srcAddr); exData.srcAmount = sub(exData.srcAmount, dfsFee); // Perform the exchange (address wrapper, uint destAmount) = _sell(exData); // send back any leftover ether or tokens sendLeftover(exData.srcAddr, exData.destAddr, _user); // log the event logger.Log(address(this), msg.sender, "ExchangeSell", abi.encode(wrapper, exData.srcAddr, exData.destAddr, exData.srcAmount, destAmount)); } /// @notice Takes a dest amount of tokens and converts it from the src token /// @dev Send always more than needed for the swap, extra will be returned /// @param exData [srcAddr, destAddr, srcAmount, destAmount, minPrice, exchangeType, exchangeAddr, callData, price0x] /// @param _user User address who called the exchange function buy(ExchangeData memory exData, address payable _user) public payable burnGas(burnAmount){ uint dfsFee = getFee(exData.srcAmount, exData.srcAddr); exData.srcAmount = sub(exData.srcAmount, dfsFee); // Perform the exchange (address wrapper, uint srcAmount) = _buy(exData); // send back any leftover ether or tokens sendLeftover(exData.srcAddr, exData.destAddr, _user); // log the event logger.Log(address(this), msg.sender, "ExchangeBuy", abi.encode(wrapper, exData.srcAddr, exData.destAddr, srcAmount, exData.destAmount)); } /// @notice Takes a feePercentage and sends it to wallet /// @param _amount Dai amount of the whole trade /// @param _token Address of the token /// @return feeAmount Amount in Dai owner earned on the fee function getFee(uint256 _amount, address _token) internal returns (uint256 feeAmount) { uint256 fee = SERVICE_FEE; if (Discount(DISCOUNT_ADDRESS).isCustomFeeSet(msg.sender)) { fee = Discount(DISCOUNT_ADDRESS).getCustomServiceFee(msg.sender); } if (fee == 0) { feeAmount = 0; } else { feeAmount = _amount / fee; if (_token == KYBER_ETH_ADDRESS) { WALLET_ID.transfer(feeAmount); } else { ERC20(_token).safeTransfer(WALLET_ID, feeAmount); } } } /// @notice Changes the amount of gas token we burn for each call /// @dev Only callable by the owner /// @param _newBurnAmount New amount of gas tokens to be burned function changeBurnAmount(uint _newBurnAmount) public { require(owner == msg.sender); burnAmount = _newBurnAmount; } } contract DFSExchange is DFSExchangeCore, AdminAuth, GasBurner { using SafeERC20 for ERC20; uint256 public constant SERVICE_FEE = 800; // 0.125% Fee // solhint-disable-next-line const-name-snakecase DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); uint public burnAmount = 10; /// @notice Takes a src amount of tokens and converts it into the dest token /// @dev Takes fee from the _srcAmount before the exchange /// @param exData [srcAddr, destAddr, srcAmount, destAmount, minPrice, exchangeType, exchangeAddr, callData, price0x] /// @param _user User address who called the exchange function sell(ExchangeData memory exData, address payable _user) public payable burnGas(burnAmount) { exData.dfsFeeDivider = SERVICE_FEE; // Perform the exchange (address wrapper, uint destAmount) = _sell(exData); // send back any leftover ether or tokens sendLeftover(exData.srcAddr, exData.destAddr, _user); // log the event logger.Log(address(this), msg.sender, "ExchangeSell", abi.encode(wrapper, exData.srcAddr, exData.destAddr, exData.srcAmount, destAmount)); } /// @notice Takes a dest amount of tokens and converts it from the src token /// @dev Send always more than needed for the swap, extra will be returned /// @param exData [srcAddr, destAddr, srcAmount, destAmount, minPrice, exchangeType, exchangeAddr, callData, price0x] /// @param _user User address who called the exchange function buy(ExchangeData memory exData, address payable _user) public payable burnGas(burnAmount){ exData.dfsFeeDivider = SERVICE_FEE; // Perform the exchange (address wrapper, uint srcAmount) = _buy(exData); // send back any leftover ether or tokens sendLeftover(exData.srcAddr, exData.destAddr, _user); // log the event logger.Log(address(this), msg.sender, "ExchangeBuy", abi.encode(wrapper, exData.srcAddr, exData.destAddr, srcAmount, exData.destAmount)); } /// @notice Changes the amount of gas token we burn for each call /// @dev Only callable by the owner /// @param _newBurnAmount New amount of gas tokens to be burned function changeBurnAmount(uint _newBurnAmount) public { require(owner == msg.sender); burnAmount = _newBurnAmount; } } contract MCDSaverFlashLoan is MCDSaverProxy, AdminAuth, FlashLoanReceiverBase { ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public {} struct SaverData { uint cdpId; uint gasCost; uint loanAmount; uint fee; address joinAddr; } function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { //check the contract has the specified balance require(_amount <= getBalanceInternal(address(this), _reserve), "Invalid balance for the contract"); ( bytes memory exDataBytes, uint cdpId, uint gasCost, address joinAddr, bool isRepay ) = abi.decode(_params, (bytes,uint256,uint256,address,bool)); ExchangeData memory exchangeData = unpackExchangeData(exDataBytes); SaverData memory saverData = SaverData({ cdpId: cdpId, gasCost: gasCost, loanAmount: _amount, fee: _fee, joinAddr: joinAddr }); if (isRepay) { repayWithLoan(exchangeData, saverData); } else { boostWithLoan(exchangeData, saverData); } transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } } function boostWithLoan( ExchangeData memory _exchangeData, SaverData memory _saverData ) internal { address user = getOwner(manager, _saverData.cdpId); // Draw users Dai uint maxDebt = getMaxDebt(_saverData.cdpId, manager.ilks(_saverData.cdpId)); uint daiDrawn = drawDai(_saverData.cdpId, manager.ilks(_saverData.cdpId), maxDebt); // Calc. fees uint dsfFee = getFee((daiDrawn + _saverData.loanAmount), _saverData.gasCost, user); uint afterFee = (daiDrawn + _saverData.loanAmount) - dsfFee; // Swap _exchangeData.srcAmount = afterFee; (, uint swapedAmount) = _sell(_exchangeData); // Return collateral addCollateral(_saverData.cdpId, _saverData.joinAddr, swapedAmount); // Draw Dai to repay the flash loan drawDai(_saverData.cdpId, manager.ilks(_saverData.cdpId), (_saverData.loanAmount + _saverData.fee)); logger.Log(address(this), msg.sender, "MCDFlashBoost", abi.encode(_saverData.cdpId, owner, _exchangeData.srcAmount, swapedAmount)); } function repayWithLoan( ExchangeData memory _exchangeData, SaverData memory _saverData ) internal { address user = getOwner(manager, _saverData.cdpId); bytes32 ilk = manager.ilks(_saverData.cdpId); // Draw collateral uint maxColl = getMaxCollateral(_saverData.cdpId, ilk, _saverData.joinAddr); uint collDrawn = drawCollateral(_saverData.cdpId, _saverData.joinAddr, maxColl); // Swap _exchangeData.srcAmount = (_saverData.loanAmount + collDrawn); (, uint swapedAmount) = _sell(_exchangeData); uint paybackAmount = (swapedAmount - getFee(swapedAmount, _saverData.gasCost, user)); paybackAmount = limitLoanAmount(_saverData.cdpId, ilk, paybackAmount, user); // Payback the debt paybackDebt(_saverData.cdpId, ilk, paybackAmount, user); // Draw collateral to repay the flash loan drawCollateral(_saverData.cdpId, _saverData.joinAddr, (_saverData.loanAmount + _saverData.fee)); logger.Log(address(this), msg.sender, "MCDFlashRepay", abi.encode(_saverData.cdpId, owner, _exchangeData.srcAmount, swapedAmount)); } /// @notice Handles that the amount is not bigger than cdp debt and not dust function limitLoanAmount(uint _cdpId, bytes32 _ilk, uint _paybackAmount, address _owner) internal returns (uint256) { uint debt = getAllDebt(address(vat), manager.urns(_cdpId), manager.urns(_cdpId), _ilk); if (_paybackAmount > debt) { ERC20(DAI_ADDRESS).transfer(_owner, (_paybackAmount - debt)); return debt; } uint debtLeft = debt - _paybackAmount; (,,,, uint dust) = vat.ilks(_ilk); dust = dust / 10**27; // Less than dust value if (debtLeft < dust) { uint amountOverDust = (dust - debtLeft); ERC20(DAI_ADDRESS).transfer(_owner, amountOverDust); return (_paybackAmount - amountOverDust); } return _paybackAmount; } receive() external override(FlashLoanReceiverBase, SaverExchangeCore) payable {} } contract CompoundFlashLoanTaker is CompoundSaverProxy, ProxyPermission, GasBurner { ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); address payable public constant COMPOUND_SAVER_FLASH_LOAN = 0xCeB190A35D9D4804b9CE8d0CF79239f6949BfCcB; address public constant AAVE_POOL_CORE = 0x3dfd23A6c5E8BbcFc9581d2E864a68feb6a076d3; /// @notice Repays the position with it's own fund or with FL if needed /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress, exchangeAddress] /// @param _gasCost Gas cost for specific transaction function repayWithLoan( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost ) public payable burnGas(25) { uint maxColl = getMaxCollateral(_cAddresses[0], address(this)); uint availableLiquidity = getAvailableLiquidity(_exData.srcAddr); if (_exData.srcAmount <= maxColl || availableLiquidity == 0) { repay(_exData, _cAddresses, _gasCost); } else { // 0x fee COMPOUND_SAVER_FLASH_LOAN.transfer(msg.value); uint loanAmount = (_exData.srcAmount - maxColl); if (loanAmount > availableLiquidity) loanAmount = availableLiquidity; bytes memory encoded = packExchangeData(_exData); bytes memory paramsData = abi.encode(encoded, _cAddresses, _gasCost, true, address(this)); givePermission(COMPOUND_SAVER_FLASH_LOAN); lendingPool.flashLoan(COMPOUND_SAVER_FLASH_LOAN, getUnderlyingAddr(_cAddresses[0]), loanAmount, paramsData); removePermission(COMPOUND_SAVER_FLASH_LOAN); logger.Log(address(this), msg.sender, "CompoundFlashRepay", abi.encode(loanAmount, _exData.srcAmount, _cAddresses[0])); } } /// @notice Boosts the position with it's own fund or with FL if needed /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress, exchangeAddress] /// @param _gasCost Gas cost for specific transaction function boostWithLoan( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost ) public payable burnGas(20) { uint maxBorrow = getMaxBorrow(_cAddresses[1], address(this)); uint availableLiquidity = getAvailableLiquidity(_exData.srcAddr); if (_exData.srcAmount <= maxBorrow || availableLiquidity == 0) { boost(_exData, _cAddresses, _gasCost); } else { // 0x fee COMPOUND_SAVER_FLASH_LOAN.transfer(msg.value); uint loanAmount = (_exData.srcAmount - maxBorrow); if (loanAmount > availableLiquidity) loanAmount = availableLiquidity; bytes memory paramsData = abi.encode(packExchangeData(_exData), _cAddresses, _gasCost, false, address(this)); givePermission(COMPOUND_SAVER_FLASH_LOAN); lendingPool.flashLoan(COMPOUND_SAVER_FLASH_LOAN, getUnderlyingAddr(_cAddresses[1]), loanAmount, paramsData); removePermission(COMPOUND_SAVER_FLASH_LOAN); logger.Log(address(this), msg.sender, "CompoundFlashBoost", abi.encode(loanAmount, _exData.srcAmount, _cAddresses[1])); } } function getAvailableLiquidity(address _tokenAddr) internal view returns (uint liquidity) { if (_tokenAddr == KYBER_ETH_ADDRESS) { liquidity = AAVE_POOL_CORE.balance; } else { liquidity = ERC20(_tokenAddr).balanceOf(AAVE_POOL_CORE); } } } contract CreamFlashLoanTaker is CreamSaverProxy, ProxyPermission, GasBurner { ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); address payable public constant COMPOUND_SAVER_FLASH_LOAN = 0x3ceD2067c0B057611e4E2686Dbe40028962Cc625; address public constant AAVE_POOL_CORE = 0x3dfd23A6c5E8BbcFc9581d2E864a68feb6a076d3; /// @notice Repays the position with it's own fund or with FL if needed /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress, exchangeAddress] /// @param _gasCost Gas cost for specific transaction function repayWithLoan( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost ) public payable burnGas(25) { uint maxColl = getMaxCollateral(_cAddresses[0], address(this)); uint availableLiquidity = getAvailableLiquidity(_exData.srcAddr); if (_exData.srcAmount <= maxColl || availableLiquidity == 0) { repay(_exData, _cAddresses, _gasCost); } else { // 0x fee COMPOUND_SAVER_FLASH_LOAN.transfer(msg.value); uint loanAmount = (_exData.srcAmount - maxColl); bytes memory encoded = packExchangeData(_exData); bytes memory paramsData = abi.encode(encoded, _cAddresses, _gasCost, true, address(this)); givePermission(COMPOUND_SAVER_FLASH_LOAN); lendingPool.flashLoan(COMPOUND_SAVER_FLASH_LOAN, getUnderlyingAddr(_cAddresses[0]), loanAmount, paramsData); removePermission(COMPOUND_SAVER_FLASH_LOAN); logger.Log(address(this), msg.sender, "CreamFlashRepay", abi.encode(loanAmount, _exData.srcAmount, _cAddresses[0])); } } /// @notice Boosts the position with it's own fund or with FL if needed /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress, exchangeAddress] /// @param _gasCost Gas cost for specific transaction function boostWithLoan( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost ) public payable burnGas(20) { uint maxBorrow = getMaxBorrow(_cAddresses[1], address(this)); uint availableLiquidity = getAvailableLiquidity(_exData.srcAddr); if (_exData.srcAmount <= maxBorrow || availableLiquidity == 0) { boost(_exData, _cAddresses, _gasCost); } else { // 0x fee COMPOUND_SAVER_FLASH_LOAN.transfer(msg.value); uint loanAmount = (_exData.srcAmount - maxBorrow); bytes memory paramsData = abi.encode(packExchangeData(_exData), _cAddresses, _gasCost, false, address(this)); givePermission(COMPOUND_SAVER_FLASH_LOAN); lendingPool.flashLoan(COMPOUND_SAVER_FLASH_LOAN, getUnderlyingAddr(_cAddresses[1]), loanAmount, paramsData); removePermission(COMPOUND_SAVER_FLASH_LOAN); logger.Log(address(this), msg.sender, "CreamFlashBoost", abi.encode(loanAmount, _exData.srcAmount, _cAddresses[1])); } } function getAvailableLiquidity(address _tokenAddr) internal view returns (uint liquidity) { if (_tokenAddr == KYBER_ETH_ADDRESS) { liquidity = AAVE_POOL_CORE.balance; } else { liquidity = ERC20(_tokenAddr).balanceOf(AAVE_POOL_CORE); } } }

0x

{"success": true, "error": null, "results": {"detectors": [{"check": "tx-origin", "impact": "Medium", "confidence": "Medium"}, {"check": "divide-before-multiply", "impact": "Medium", "confidence": "Medium"}, {"check": "name-reused", "impact": "High", "confidence": "High"}, {"check": "erc20-interface", "impact": "Medium", "confidence": "High"}, {"check": "arbitrary-send", "impact": "High", "confidence": "Medium"}, {"check": "unchecked-lowlevel", "impact": "Medium", "confidence": "Medium"}, {"check": "incorrect-equality", "impact": "Medium", "confidence": "High"}, {"check": "uninitialized-local", "impact": "Medium", "confidence": "Medium"}, {"check": "unchecked-transfer", "impact": "High", "confidence": "Medium"}, {"check": "unused-return", "impact": "Medium", "confidence": "Medium"}, {"check": "locked-ether", "impact": "Medium", "confidence": "High"}]}}

0x7Bf1Ab205D74201F038FFc7FAd95e5729e103199

pragma solidity 0.6.10; pragma experimental ABIEncoderV2; abstract contract Context { function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor () internal { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), msgSender); } /** * @dev Returns the address of the current owner. */ function owner() public view returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(_owner == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { emit OwnershipTransferred(_owner, address(0)); _owner = address(0); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } } library ECDSA { /** * @dev Returns the address that signed a hashed message (`hash`) with * `signature`. This address can then be used for verification purposes. * * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures: * this function rejects them by requiring the `s` value to be in the lower * half order, and the `v` value to be either 27 or 28. * * IMPORTANT: `hash` _must_ be the result of a hash operation for the * verification to be secure: it is possible to craft signatures that * recover to arbitrary addresses for non-hashed data. A safe way to ensure * this is by receiving a hash of the original message (which may otherwise * be too long), and then calling {toEthSignedMessageHash} on it. */ function recover(bytes32 hash, bytes memory signature) internal pure returns (address) { // Check the signature length if (signature.length != 65) { revert("ECDSA: invalid signature length"); } // Divide the signature in r, s and v variables bytes32 r; bytes32 s; uint8 v; // ecrecover takes the signature parameters, and the only way to get them // currently is to use assembly. // solhint-disable-next-line no-inline-assembly assembly { r := mload(add(signature, 0x20)) s := mload(add(signature, 0x40)) v := byte(0, mload(add(signature, 0x60))) } // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines // the valid range for s in (281): 0 < s < secp256k1n ÷ 2 + 1, and for v in (282): v ∈ {27, 28}. Most // signatures from current libraries generate a unique signature with an s-value in the lower half order. // // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept // these malleable signatures as well. if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) { revert("ECDSA: invalid signature 's' value"); } if (v != 27 && v != 28) { revert("ECDSA: invalid signature 'v' value"); } // If the signature is valid (and not malleable), return the signer address address signer = ecrecover(hash, v, r, s); require(signer != address(0), "ECDSA: invalid signature"); return signer; } /** * @dev Returns an Ethereum Signed Message, created from a `hash`. This * replicates the behavior of the * https://github.com/ethereum/wiki/wiki/JSON-RPC#eth_sign[`eth_sign`] * JSON-RPC method. * * See {recover}. */ function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) { // 32 is the length in bytes of hash, // enforced by the type signature above return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash)); } } library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } interface IForwarder { struct ForwardRequest { address from; address to; uint256 value; uint256 gas; uint256 nonce; bytes data; } function getNonce(address from) external view returns(uint256); /** * verify the transaction would execute. * validate the signature and the nonce of the request. * revert if either signature or nonce are incorrect. */ function verify( ForwardRequest calldata forwardRequest, bytes32 domainSeparator, bytes32 requestTypeHash, bytes calldata suffixData, bytes calldata signature ) external view; /** * execute a transaction * @param forwardRequest - all transaction parameters * @param domainSeparator - domain used when signing this request * @param requestTypeHash - request type used when signing this request. * @param suffixData - the extension data used when signing this request. * @param signature - signature to validate. * * the transaction is verified, and then executed. * the success and ret of "call" are returned. * This method would revert only verification errors. target errors * are reported using the returned "success" and ret string */ function execute( ForwardRequest calldata forwardRequest, bytes32 domainSeparator, bytes32 requestTypeHash, bytes calldata suffixData, bytes calldata signature ) external payable returns (bool success, bytes memory ret); /** * Register a new Request typehash. * @param typeName - the name of the request type. * @param typeSuffix - anything after the generic params can be empty string (if no extra fields are needed) * if it does contain a value, then a comma is added first. */ function registerRequestType(string calldata typeName, string calldata typeSuffix) external; /** * Register a new domain separator. * The domain separator must have the following fields: name,version,chainId, verifyingContract. * the chainId is the current network's chainId, and the verifyingContract is this forwarder. * This method is given the domain name and version to create and register the domain separator value. * @param name the domain's display name * @param version the domain/protocol version */ function registerDomainSeparator(string calldata name, string calldata version) external; } contract TestForwarder { function callExecute(Forwarder forwarder, Forwarder.ForwardRequest memory req, bytes32 domainSeparator, bytes32 requestTypeHash, bytes memory suffixData, bytes memory sig) public payable { (bool success, bytes memory error) = forwarder.execute{value:msg.value}(req, domainSeparator, requestTypeHash, suffixData, sig); emit Result(success, success ? "" : this.decodeErrorMessage(error)); } event Result(bool success, string error); function decodeErrorMessage(bytes calldata ret) external pure returns (string memory message) { //decode evert string: assume it has a standard Error(string) signature: simply skip the (selector,offset,length) fields if ( ret.length>4+32+32 ) { return abi.decode(ret[4:], (string)); } //unknown buffer. return as-is return string(ret); } function getChainId() public pure returns (uint256 id){ /* solhint-disable-next-line no-inline-assembly */ assembly { id := chainid() } } } interface GsnTypes { struct RelayData { uint256 gasPrice; uint256 pctRelayFee; uint256 baseRelayFee; address relayWorker; address paymaster; bytes paymasterData; uint256 clientId; address forwarder; } //note: must start with the ForwardRequest to be an extension of the generic forwarder struct RelayRequest { IForwarder.ForwardRequest request; RelayData relayData; } } interface IKnowForwarderAddress { /** * return the forwarder we trust to forward relayed transactions to us. * the forwarder is required to verify the sender's signature, and verify * the call is not a replay. */ function getTrustedForwarder() external view returns(address); } interface IPaymaster { /** * @param acceptanceBudget - * Paymaster expected gas budget to accept (or reject) a request * This a gas required by any calculations that might need to reject the * transaction, by preRelayedCall, forwarder and recipient. * See value in BasePaymaster.PAYMASTER_ACCEPTANCE_BUDGET * Transaction that gets rejected above that gas usage is on the paymaster's expense. * As long this value is above preRelayedCallGasLimit (see defaults in BasePaymaster), the * Paymaster is guaranteed it will never pay for rejected transactions. * If this value is below preRelayedCallGasLimt, it might might make Paymaster open to a "griefing" attack. * * Specifying value too high might make the call rejected by some relayers. * * From a Relay's point of view, this is the highest gas value a paymaster might "grief" the relay, * since the paymaster will pay anything above that (regardless if the tx reverts) * * @param preRelayedCallGasLimit - the max gas usage of preRelayedCall. any revert (including OOG) * of preRelayedCall is a reject by the paymaster. * as long as acceptanceBudget is above preRelayedCallGasLimit, any such revert (including OOG) * is not payed by the paymaster. * @param postRelayedCallGasLimit - the max gas usage of postRelayedCall. * note that an OOG will revert the transaction, but the paymaster already committed to pay, * so the relay will get compensated, at the expense of the paymaster */ struct GasLimits { uint256 acceptanceBudget; uint256 preRelayedCallGasLimit; uint256 postRelayedCallGasLimit; } /** * Return the GasLimits constants used by the Paymaster. */ function getGasLimits() external view returns ( GasLimits memory limits ); function trustedForwarder() external view returns (IForwarder); /** * return the relayHub of this contract. */ function getHubAddr() external view returns (address); /** * Can be used to determine if the contract can pay for incoming calls before making any. * @return the paymaster's deposit in the RelayHub. */ function getRelayHubDeposit() external view returns (uint256); /** * Called by Relay (and RelayHub), to validate if the paymaster agrees to pay for this call. * * MUST be protected with relayHubOnly() in case it modifies state. * * The Paymaster rejects by the following "revert" operations * - preRelayedCall() method reverts * - the forwarder reverts because of nonce or signature error * - the paymaster returned "rejectOnRecipientRevert", and the recipient contract reverted. * In any of the above cases, all paymaster calls (and recipient call) are reverted. * In any other case, the paymaster agrees to pay for the gas cost of the transaction (note * that this includes also postRelayedCall revert) * * The rejectOnRecipientRevert flag means the Paymaster "delegate" the rejection to the recipient * code. It also means the Paymaster trust the recipient to reject fast: both preRelayedCall, * forwarder check and receipient checks must fit into the GasLimits.acceptanceBudget, * otherwise the TX is paid by the Paymaster. * * @param relayRequest - the full relay request structure * @param signature - user's EIP712-compatible signature of the {@link relayRequest}. * Note that in most cases the paymaster shouldn't try use it at all. It is always checked * by the forwarder immediately after preRelayedCall returns. * @param approvalData - extra dapp-specific data (e.g. signature from trusted party) * @param maxPossibleGas - based on values returned from {@link getGasLimits}, * the RelayHub will calculate the maximum possible amount of gas the user may be charged for. * In order to convert this value to wei, the Paymaster has to call "relayHub.calculateCharge()" * return: * a context to be passed to postRelayedCall * rejectOnRecipientRevert - TRUE if paymaster want to reject the TX if the recipient reverts. * FALSE means that rejects by the recipient will be completed on chain, and paid by the paymaster. * (note that in the latter case, the preRelayedCall and postRelayedCall are not reverted). */ function preRelayedCall( GsnTypes.RelayRequest calldata relayRequest, bytes calldata signature, bytes calldata approvalData, uint256 maxPossibleGas ) external returns (bytes memory context, bool rejectOnRecipientRevert); /** * This method is called after the actual relayed function call. * It may be used to record the transaction (e.g. charge the caller by some contract logic) for this call. * * MUST be protected with relayHubOnly() in case it modifies state. * * @param context - the call context, as returned by the preRelayedCall * @param success - true if the relayed call succeeded, false if it reverted * @param gasUseWithoutPost - the actual amount of gas used by the entire transaction, EXCEPT * the gas used by the postRelayedCall itself. * @param relayData - the relay params of the request. can be used by relayHub.calculateCharge() * * Revert in this functions causes a revert of the client's relayed call (and preRelayedCall(), but the Paymaster * is still committed to pay the relay for the entire transaction. */ function postRelayedCall( bytes calldata context, bool success, uint256 gasUseWithoutPost, GsnTypes.RelayData calldata relayData ) external; function versionPaymaster() external view returns (string memory); } interface IPenalizer { struct Transaction { uint256 nonce; uint256 gasPrice; uint256 gasLimit; address to; uint256 value; bytes data; } function penalizeRepeatedNonce( bytes calldata unsignedTx1, bytes calldata signature1, bytes calldata unsignedTx2, bytes calldata signature2, IRelayHub hub ) external; function penalizeIllegalTransaction( bytes calldata unsignedTx, bytes calldata signature, IRelayHub hub ) external; function versionPenalizer() external view returns (string memory); } interface IRelayHub { /// Emitted when a relay server registers or updates its details /// Looking at these events lets a client discover relay servers event RelayServerRegistered( address indexed relayManager, uint256 baseRelayFee, uint256 pctRelayFee, string relayUrl); /// Emitted when relays are added by a relayManager event RelayWorkersAdded( address indexed relayManager, address[] newRelayWorkers, uint256 workersCount ); // Emitted when an account withdraws funds from RelayHub. event Withdrawn( address indexed account, address indexed dest, uint256 amount ); // Emitted when depositFor is called, including the amount and account that was funded. event Deposited( address indexed paymaster, address indexed from, uint256 amount ); /// Emitted when an attempt to relay a call fails and Paymaster does not accept the transaction. /// The actual relayed call was not executed, and the recipient not charged. /// @param reason contains a revert reason returned from preRelayedCall or forwarder. event TransactionRejectedByPaymaster( address indexed relayManager, address indexed paymaster, address indexed from, address to, address relayWorker, bytes4 selector, uint256 innerGasUsed, bytes reason); // Emitted when a transaction is relayed. Note that the actual encoded function might be reverted: this will be // indicated in the status field. // Useful when monitoring a relay's operation and relayed calls to a contract. // Charge is the ether value deducted from the recipient's balance, paid to the relay's manager. event TransactionRelayed( address indexed relayManager, address indexed relayWorker, address indexed from, address to, address paymaster, bytes4 selector, RelayCallStatus status, uint256 charge); event TransactionResult( RelayCallStatus status, bytes returnValue ); event Penalized( address indexed relayWorker, address sender, uint256 reward ); /// Reason error codes for the TransactionRelayed event /// @param OK - the transaction was successfully relayed and execution successful - never included in the event /// @param RelayedCallFailed - the transaction was relayed, but the relayed call failed /// @param RejectedByPreRelayed - the transaction was not relayed due to preRelatedCall reverting /// @param RejectedByForwarder - the transaction was not relayed due to forwarder check (signature,nonce) /// @param PostRelayedFailed - the transaction was relayed and reverted due to postRelatedCall reverting /// @param PaymasterBalanceChanged - the transaction was relayed and reverted due to the paymaster balance change enum RelayCallStatus { OK, RelayedCallFailed, RejectedByPreRelayed, RejectedByForwarder, RejectedByRecipientRevert, PostRelayedFailed, PaymasterBalanceChanged } /// Add new worker addresses controlled by sender who must be a staked Relay Manager address. /// Emits a RelayWorkersAdded event. /// This function can be called multiple times, emitting new events function addRelayWorkers(address[] calldata newRelayWorkers) external; function registerRelayServer(uint256 baseRelayFee, uint256 pctRelayFee, string calldata url) external; // Balance management // Deposits ether for a contract, so that it can receive (and pay for) relayed transactions. Unused balance can only // be withdrawn by the contract itself, by calling withdraw. // Emits a Deposited event. function depositFor(address target) external payable; // Withdraws from an account's balance, sending it back to it. Relay managers call this to retrieve their revenue, and // contracts can also use it to reduce their funding. // Emits a Withdrawn event. function withdraw(uint256 amount, address payable dest) external; // Relaying /// Relays a transaction. For this to succeed, multiple conditions must be met: /// - Paymaster's "acceptRelayCall" method must succeed and not revert /// - the sender must be a registered Relay Worker that the user signed /// - the transaction's gas price must be equal or larger than the one that was signed by the sender /// - the transaction must have enough gas to run all internal transactions if they use all gas available to them /// - the Paymaster must have enough balance to pay the Relay Worker for the scenario when all gas is spent /// /// If all conditions are met, the call will be relayed and the recipient charged. /// /// Arguments: /// @param relayRequest - all details of the requested relayed call /// @param signature - client's EIP-712 signature over the relayRequest struct /// @param approvalData: dapp-specific data forwarded to preRelayedCall. /// This value is *not* verified by the Hub. For example, it can be used to pass a signature to the Paymaster /// @param externalGasLimit - the value passed as gasLimit to the transaction. /// /// Emits a TransactionRelayed event. function relayCall( uint paymasterMaxAcceptanceBudget, GsnTypes.RelayRequest calldata relayRequest, bytes calldata signature, bytes calldata approvalData, uint externalGasLimit ) external returns (bool paymasterAccepted, bytes memory returnValue); function penalize(address relayWorker, address payable beneficiary) external; /// The fee is expressed as a base fee in wei plus percentage on actual charge. /// E.g. a value of 40 stands for a 40% fee, so the recipient will be /// charged for 1.4 times the spent amount. function calculateCharge(uint256 gasUsed, GsnTypes.RelayData calldata relayData) external view returns (uint256); /* getters */ /// Returns the stake manager of this RelayHub. function stakeManager() external view returns(IStakeManager); function penalizer() external view returns(address); /// Returns an account's deposits. It can be either a deposit of a paymaster, or a revenue of a relay manager. function balanceOf(address target) external view returns (uint256); // Minimum stake a relay can have. An attack to the network will never cost less than half this value. function minimumStake() external view returns (uint256); // Minimum unstake delay blocks of a relay manager's stake on the StakeManager function minimumUnstakeDelay() external view returns (uint256); // Maximum funds that can be deposited at once. Prevents user error by disallowing large deposits. function maximumRecipientDeposit() external view returns (uint256); //gas overhead to calculate gasUseWithoutPost function postOverhead() external view returns (uint256); // Gas set aside for all relayCall() instructions to prevent unexpected out-of-gas exceptions function gasReserve() external view returns (uint256); // maximum number of worker account allowed per manager function maxWorkerCount() external view returns (uint256); function workerToManager(address worker) external view returns(address); function workerCount(address manager) external view returns(uint256); function isRelayManagerStaked(address relayManager) external view returns(bool); /** * @dev the total gas overhead of relayCall(), before the first gasleft() and after the last gasleft(). * Assume that relay has non-zero balance (costs 15'000 more otherwise). */ // Gas cost of all relayCall() instructions after actual 'calculateCharge()' function gasOverhead() external view returns (uint256); function versionHub() external view returns (string memory); } abstract contract IRelayRecipient { /** * return if the forwarder is trusted to forward relayed transactions to us. * the forwarder is required to verify the sender's signature, and verify * the call is not a replay. */ function isTrustedForwarder(address forwarder) public virtual view returns(bool); /** * return the sender of this call. * if the call came through our trusted forwarder, then the real sender is appended as the last 20 bytes * of the msg.data. * otherwise, return `msg.sender` * should be used in the contract anywhere instead of msg.sender */ function _msgSender() internal virtual view returns (address payable); /** * return the msg.data of this call. * if the call came through our trusted forwarder, then the real sender was appended as the last 20 bytes * of the msg.data - so this method will strip those 20 bytes off. * otherwise, return `msg.data` * should be used in the contract instead of msg.data, where the difference matters (e.g. when explicitly * signing or hashing the */ function _msgData() internal virtual view returns (bytes memory); function versionRecipient() external virtual view returns (string memory); } interface IStakeManager { /// Emitted when a stake or unstakeDelay are initialized or increased event StakeAdded( address indexed relayManager, address indexed owner, uint256 stake, uint256 unstakeDelay ); /// Emitted once a stake is scheduled for withdrawal event StakeUnlocked( address indexed relayManager, address indexed owner, uint256 withdrawBlock ); /// Emitted when owner withdraws relayManager funds event StakeWithdrawn( address indexed relayManager, address indexed owner, uint256 amount ); /// Emitted when an authorized Relay Hub penalizes a relayManager event StakePenalized( address indexed relayManager, address indexed beneficiary, uint256 reward ); event HubAuthorized( address indexed relayManager, address indexed relayHub ); event HubUnauthorized( address indexed relayManager, address indexed relayHub, uint256 removalBlock ); /// @param stake - amount of ether staked for this relay /// @param unstakeDelay - number of blocks to elapse before the owner can retrieve the stake after calling 'unlock' /// @param withdrawBlock - first block number 'withdraw' will be callable, or zero if the unlock has not been called /// @param owner - address that receives revenue and manages relayManager's stake struct StakeInfo { uint256 stake; uint256 unstakeDelay; uint256 withdrawBlock; address payable owner; } struct RelayHubInfo { uint256 removalBlock; } /// Put a stake for a relayManager and set its unstake delay. /// If the entry does not exist, it is created, and the caller of this function becomes its owner. /// If the entry already exists, only the owner can call this function. /// @param relayManager - address that represents a stake entry and controls relay registrations on relay hubs /// @param unstakeDelay - number of blocks to elapse before the owner can retrieve the stake after calling 'unlock' function stakeForAddress(address relayManager, uint256 unstakeDelay) external payable; function unlockStake(address relayManager) external; function withdrawStake(address relayManager) external; function authorizeHubByOwner(address relayManager, address relayHub) external; function authorizeHubByManager(address relayHub) external; function unauthorizeHubByOwner(address relayManager, address relayHub) external; function unauthorizeHubByManager(address relayHub) external; function isRelayManagerStaked(address relayManager, address relayHub, uint256 minAmount, uint256 minUnstakeDelay) external view returns (bool); /// Slash the stake of the relay relayManager. In order to prevent stake kidnapping, burns half of stake on the way. /// @param relayManager - entry to penalize /// @param beneficiary - address that receives half of the penalty amount /// @param amount - amount to withdraw from stake function penalizeRelayManager(address relayManager, address payable beneficiary, uint256 amount) external; function getStakeInfo(address relayManager) external view returns (StakeInfo memory stakeInfo); function versionSM() external view returns (string memory); } interface IVersionRegistry { //event emitted whenever a version is added event VersionAdded(bytes32 indexed id, bytes32 version, string value, uint time); //event emitted whenever a version is canceled event VersionCanceled(bytes32 indexed id, bytes32 version, string reason); /** * add a version * @param id the object-id to add a version (32-byte string) * @param version the new version to add (32-byte string) * @param value value to attach to this version */ function addVersion(bytes32 id, bytes32 version, string calldata value) external; /** * cancel a version. */ function cancelVersion(bytes32 id, bytes32 version, string calldata reason) external; } library GsnEip712Library { // maximum length of return value/revert reason for 'execute' method. Will truncate result if exceeded. uint256 private constant MAX_RETURN_SIZE = 1024; //copied from Forwarder (can't reference string constants even from another library) string public constant GENERIC_PARAMS = "address from,address to,uint256 value,uint256 gas,uint256 nonce,bytes data"; bytes public constant RELAYDATA_TYPE = "RelayData(uint256 gasPrice,uint256 pctRelayFee,uint256 baseRelayFee,address relayWorker,address paymaster,address forwarder,bytes paymasterData,uint256 clientId)"; string public constant RELAY_REQUEST_NAME = "RelayRequest"; string public constant RELAY_REQUEST_SUFFIX = string(abi.encodePacked("RelayData relayData)", RELAYDATA_TYPE)); bytes public constant RELAY_REQUEST_TYPE = abi.encodePacked( RELAY_REQUEST_NAME,"(",GENERIC_PARAMS,",", RELAY_REQUEST_SUFFIX); bytes32 public constant RELAYDATA_TYPEHASH = keccak256(RELAYDATA_TYPE); bytes32 public constant RELAY_REQUEST_TYPEHASH = keccak256(RELAY_REQUEST_TYPE); struct EIP712Domain { string name; string version; uint256 chainId; address verifyingContract; } bytes32 public constant EIP712DOMAIN_TYPEHASH = keccak256( "EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)" ); function splitRequest( GsnTypes.RelayRequest calldata req ) internal pure returns ( IForwarder.ForwardRequest memory forwardRequest, bytes memory suffixData ) { forwardRequest = IForwarder.ForwardRequest( req.request.from, req.request.to, req.request.value, req.request.gas, req.request.nonce, req.request.data ); suffixData = abi.encode( hashRelayData(req.relayData)); } //verify that the recipient trusts the given forwarder // MUST be called by paymaster function verifyForwarderTrusted(GsnTypes.RelayRequest calldata relayRequest) internal view { (bool success, bytes memory ret) = relayRequest.request.to.staticcall( abi.encodeWithSelector( IRelayRecipient.isTrustedForwarder.selector, relayRequest.relayData.forwarder ) ); require(success, "isTrustedForwarder reverted"); require(ret.length == 32, "isTrustedForwarder returned invalid response"); require(abi.decode(ret, (bool)), "invalid forwarder for recipient"); } function verifySignature(GsnTypes.RelayRequest calldata relayRequest, bytes calldata signature) internal view { (IForwarder.ForwardRequest memory forwardRequest, bytes memory suffixData) = splitRequest(relayRequest); bytes32 domainSeparator = domainSeparator(relayRequest.relayData.forwarder); IForwarder forwarder = IForwarder(payable(relayRequest.relayData.forwarder)); forwarder.verify(forwardRequest, domainSeparator, RELAY_REQUEST_TYPEHASH, suffixData, signature); } function verify(GsnTypes.RelayRequest calldata relayRequest, bytes calldata signature) internal view { verifyForwarderTrusted(relayRequest); verifySignature(relayRequest, signature); } function execute(GsnTypes.RelayRequest calldata relayRequest, bytes calldata signature) internal returns (bool forwarderSuccess, bool callSuccess, bytes memory ret) { (IForwarder.ForwardRequest memory forwardRequest, bytes memory suffixData) = splitRequest(relayRequest); bytes32 domainSeparator = domainSeparator(relayRequest.relayData.forwarder); /* solhint-disable-next-line avoid-low-level-calls */ (forwarderSuccess, ret) = relayRequest.relayData.forwarder.call( abi.encodeWithSelector(IForwarder.execute.selector, forwardRequest, domainSeparator, RELAY_REQUEST_TYPEHASH, suffixData, signature )); if ( forwarderSuccess ) { //decode return value of execute: (callSuccess, ret) = abi.decode(ret, (bool, bytes)); } truncateInPlace(ret); } //truncate the given parameter (in-place) if its length is above the given maximum length // do nothing otherwise. //NOTE: solidity warns unless the method is marked "pure", but it DOES modify its parameter. function truncateInPlace(bytes memory data) internal pure { MinLibBytes.truncateInPlace(data, MAX_RETURN_SIZE); } function domainSeparator(address forwarder) internal pure returns (bytes32) { return hashDomain(EIP712Domain({ name : "GSN Relayed Transaction", version : "2", chainId : getChainID(), verifyingContract : forwarder })); } function getChainID() internal pure returns (uint256 id) { /* solhint-disable no-inline-assembly */ assembly { id := chainid() } } function hashDomain(EIP712Domain memory req) internal pure returns (bytes32) { return keccak256(abi.encode( EIP712DOMAIN_TYPEHASH, keccak256(bytes(req.name)), keccak256(bytes(req.version)), req.chainId, req.verifyingContract)); } function hashRelayData(GsnTypes.RelayData calldata req) internal pure returns (bytes32) { return keccak256(abi.encode( RELAYDATA_TYPEHASH, req.gasPrice, req.pctRelayFee, req.baseRelayFee, req.relayWorker, req.paymaster, req.forwarder, keccak256(req.paymasterData), req.clientId )); } } library GsnUtils { /** * extract method sig from encoded function call */ function getMethodSig(bytes memory msgData) internal pure returns (bytes4) { return MinLibBytes.readBytes4(msgData, 0); } /** * extract parameter from encoded-function block. * see: https://solidity.readthedocs.io/en/develop/abi-spec.html#formal-specification-of-the-encoding * the return value should be casted to the right type (uintXXX/bytesXXX/address/bool/enum) */ function getParam(bytes memory msgData, uint index) internal pure returns (uint) { return MinLibBytes.readUint256(msgData, 4 + index * 32); } //re-throw revert with the same revert data. function revertWithData(bytes memory data) internal pure { assembly { revert(add(data,32), mload(data)) } } } library MinLibBytes { //truncate the given parameter (in-place) if its length is above the given maximum length // do nothing otherwise. //NOTE: solidity warns unless the method is marked "pure", but it DOES modify its parameter. function truncateInPlace(bytes memory data, uint256 maxlen) internal pure { if (data.length > maxlen) { assembly { mstore(data, maxlen) } } } /// @dev Reads an address from a position in a byte array. /// @param b Byte array containing an address. /// @param index Index in byte array of address. /// @return result address from byte array. function readAddress( bytes memory b, uint256 index ) internal pure returns (address result) { require (b.length >= index + 20, "readAddress: data too short"); // Add offset to index: // 1. Arrays are prefixed by 32-byte length parameter (add 32 to index) // 2. Account for size difference between address length and 32-byte storage word (subtract 12 from index) index += 20; // Read address from array memory assembly { // 1. Add index to address of bytes array // 2. Load 32-byte word from memory // 3. Apply 20-byte mask to obtain address result := and(mload(add(b, index)), 0xffffffffffffffffffffffffffffffffffffffff) } return result; } function readBytes32( bytes memory b, uint256 index ) internal pure returns (bytes32 result) { require(b.length >= index + 32, "readBytes32: data too short" ); // Read the bytes32 from array memory assembly { result := mload(add(b, add(index,32))) } return result; } /// @dev Reads a uint256 value from a position in a byte array. /// @param b Byte array containing a uint256 value. /// @param index Index in byte array of uint256 value. /// @return result uint256 value from byte array. function readUint256( bytes memory b, uint256 index ) internal pure returns (uint256 result) { result = uint256(readBytes32(b, index)); return result; } function readBytes4( bytes memory b, uint256 index ) internal pure returns (bytes4 result) { require(b.length >= index + 4, "readBytes4: data too short"); // Read the bytes4 from array memory assembly { result := mload(add(b, add(index,32))) // Solidity does not require us to clean the trailing bytes. // We do it anyway result := and(result, 0xFFFFFFFF00000000000000000000000000000000000000000000000000000000) } return result; } } library RLPReader { uint8 constant STRING_SHORT_START = 0x80; uint8 constant STRING_LONG_START = 0xb8; uint8 constant LIST_SHORT_START = 0xc0; uint8 constant LIST_LONG_START = 0xf8; uint8 constant WORD_SIZE = 32; struct RLPItem { uint len; uint memPtr; } using RLPReader for bytes; using RLPReader for uint; using RLPReader for RLPReader.RLPItem; // helper function to decode rlp encoded ethereum transaction /* * @param rawTransaction RLP encoded ethereum transaction * @return tuple (nonce,gasPrice,gasLimit,to,value,data) */ function decodeTransaction(bytes memory rawTransaction) internal pure returns (uint, uint, uint, address, uint, bytes memory){ RLPReader.RLPItem[] memory values = rawTransaction.toRlpItem().toList(); // must convert to an rlpItem first! return (values[0].toUint(), values[1].toUint(), values[2].toUint(), values[3].toAddress(), values[4].toUint(), values[5].toBytes()); } /* * @param item RLP encoded bytes */ function toRlpItem(bytes memory item) internal pure returns (RLPItem memory) { if (item.length == 0) return RLPItem(0, 0); uint memPtr; assembly { memPtr := add(item, 0x20) } return RLPItem(item.length, memPtr); } /* * @param item RLP encoded list in bytes */ function toList(RLPItem memory item) internal pure returns (RLPItem[] memory result) { require(isList(item), "isList failed"); uint items = numItems(item); result = new RLPItem[](items); uint memPtr = item.memPtr + _payloadOffset(item.memPtr); uint dataLen; for (uint i = 0; i < items; i++) { dataLen = _itemLength(memPtr); result[i] = RLPItem(dataLen, memPtr); memPtr = memPtr + dataLen; } } /* * Helpers */ // @return indicator whether encoded payload is a list. negate this function call for isData. function isList(RLPItem memory item) internal pure returns (bool) { uint8 byte0; uint memPtr = item.memPtr; assembly { byte0 := byte(0, mload(memPtr)) } if (byte0 < LIST_SHORT_START) return false; return true; } // @return number of payload items inside an encoded list. function numItems(RLPItem memory item) internal pure returns (uint) { uint count = 0; uint currPtr = item.memPtr + _payloadOffset(item.memPtr); uint endPtr = item.memPtr + item.len; while (currPtr < endPtr) { currPtr = currPtr + _itemLength(currPtr); // skip over an item count++; } return count; } // @return entire rlp item byte length function _itemLength(uint memPtr) internal pure returns (uint len) { uint byte0; assembly { byte0 := byte(0, mload(memPtr)) } if (byte0 < STRING_SHORT_START) return 1; else if (byte0 < STRING_LONG_START) return byte0 - STRING_SHORT_START + 1; else if (byte0 < LIST_SHORT_START) { assembly { let byteLen := sub(byte0, 0xb7) // # of bytes the actual length is memPtr := add(memPtr, 1) // skip over the first byte /* 32 byte word size */ let dataLen := div(mload(memPtr), exp(256, sub(32, byteLen))) // right shifting to get the len len := add(dataLen, add(byteLen, 1)) } } else if (byte0 < LIST_LONG_START) { return byte0 - LIST_SHORT_START + 1; } else { assembly { let byteLen := sub(byte0, 0xf7) memPtr := add(memPtr, 1) let dataLen := div(mload(memPtr), exp(256, sub(32, byteLen))) // right shifting to the correct length len := add(dataLen, add(byteLen, 1)) } } } // @return number of bytes until the data function _payloadOffset(uint memPtr) internal pure returns (uint) { uint byte0; assembly { byte0 := byte(0, mload(memPtr)) } if (byte0 < STRING_SHORT_START) return 0; else if (byte0 < STRING_LONG_START || (byte0 >= LIST_SHORT_START && byte0 < LIST_LONG_START)) return 1; else if (byte0 < LIST_SHORT_START) // being explicit return byte0 - (STRING_LONG_START - 1) + 1; else return byte0 - (LIST_LONG_START - 1) + 1; } /** RLPItem conversions into data types **/ // @returns raw rlp encoding in bytes function toRlpBytes(RLPItem memory item) internal pure returns (bytes memory) { bytes memory result = new bytes(item.len); uint ptr; assembly { ptr := add(0x20, result) } copy(item.memPtr, ptr, item.len); return result; } function toBoolean(RLPItem memory item) internal pure returns (bool) { require(item.len == 1, "Invalid RLPItem. Booleans are encoded in 1 byte"); uint result; uint memPtr = item.memPtr; assembly { result := byte(0, mload(memPtr)) } return result == 0 ? false : true; } function toAddress(RLPItem memory item) internal pure returns (address) { // 1 byte for the length prefix according to RLP spec require(item.len <= 21, "Invalid RLPItem. Addresses are encoded in 20 bytes or less"); return address(toUint(item)); } function toUint(RLPItem memory item) internal pure returns (uint) { uint offset = _payloadOffset(item.memPtr); uint len = item.len - offset; uint memPtr = item.memPtr + offset; uint result; assembly { result := div(mload(memPtr), exp(256, sub(32, len))) // shift to the correct location } return result; } function toBytes(RLPItem memory item) internal pure returns (bytes memory) { uint offset = _payloadOffset(item.memPtr); uint len = item.len - offset; // data length bytes memory result = new bytes(len); uint destPtr; assembly { destPtr := add(0x20, result) } copy(item.memPtr + offset, destPtr, len); return result; } /* * @param src Pointer to source * @param dest Pointer to destination * @param len Amount of memory to copy from the source */ function copy(uint src, uint dest, uint len) internal pure { // copy as many word sizes as possible for (; len >= WORD_SIZE; len -= WORD_SIZE) { assembly { mstore(dest, mload(src)) } src += WORD_SIZE; dest += WORD_SIZE; } // left over bytes. Mask is used to remove unwanted bytes from the word uint mask = 256 ** (WORD_SIZE - len) - 1; assembly { let srcpart := and(mload(src), not(mask)) // zero out src let destpart := and(mload(dest), mask) // retrieve the bytes mstore(dest, or(destpart, srcpart)) } } } contract VersionRegistry is IVersionRegistry, Ownable { function addVersion(bytes32 id, bytes32 version, string calldata value) external override onlyOwner { require(id != bytes32(0), "missing id"); require(version != bytes32(0), "missing version"); emit VersionAdded(id, version, value, block.timestamp); } function cancelVersion(bytes32 id, bytes32 version, string calldata reason) external override onlyOwner { emit VersionCanceled(id, version, reason); } } abstract contract BasePaymaster is IPaymaster, Ownable { IRelayHub internal relayHub; IForwarder public override trustedForwarder; function getHubAddr() public override view returns (address) { return address(relayHub); } //overhead of forwarder verify+signature, plus hub overhead. uint256 constant public FORWARDER_HUB_OVERHEAD = 50000; //These parameters are documented in IPaymaster.GasLimits uint256 constant public PRE_RELAYED_CALL_GAS_LIMIT = 100000; uint256 constant public POST_RELAYED_CALL_GAS_LIMIT = 110000; uint256 constant public PAYMASTER_ACCEPTANCE_BUDGET = PRE_RELAYED_CALL_GAS_LIMIT + FORWARDER_HUB_OVERHEAD; function getGasLimits() public override virtual view returns ( IPaymaster.GasLimits memory limits ) { return IPaymaster.GasLimits( PAYMASTER_ACCEPTANCE_BUDGET, PRE_RELAYED_CALL_GAS_LIMIT, POST_RELAYED_CALL_GAS_LIMIT ); } // this method must be called from preRelayedCall to validate that the forwarder // is approved by the paymaster as well as by the recipient contract. function _verifyForwarder(GsnTypes.RelayRequest calldata relayRequest) public view { require(address(trustedForwarder) == relayRequest.relayData.forwarder, "Forwarder is not trusted"); GsnEip712Library.verifyForwarderTrusted(relayRequest); } /* * modifier to be used by recipients as access control protection for preRelayedCall & postRelayedCall */ modifier relayHubOnly() { require(msg.sender == getHubAddr(), "Function can only be called by RelayHub"); _; } function setRelayHub(IRelayHub hub) public onlyOwner { relayHub = hub; } function setTrustedForwarder(IForwarder forwarder) public onlyOwner { trustedForwarder = forwarder; } /// check current deposit on relay hub. // (wanted to name it "getRelayHubDeposit()", but we use the name from IRelayRecipient... function getRelayHubDeposit() public override view returns (uint) { return relayHub.balanceOf(address(this)); } // any money moved into the paymaster is transferred as a deposit. // This way, we don't need to understand the RelayHub API in order to replenish // the paymaster. receive() external virtual payable { require(address(relayHub) != address(0), "relay hub address not set"); relayHub.depositFor{value:msg.value}(address(this)); } /// withdraw deposit from relayHub function withdrawRelayHubDepositTo(uint amount, address payable target) public onlyOwner { relayHub.withdraw(amount, target); } } abstract contract BaseRelayRecipient is IRelayRecipient { /* * Forwarder singleton we accept calls from */ address public trustedForwarder; function isTrustedForwarder(address forwarder) public override view returns(bool) { return forwarder == trustedForwarder; } /** * return the sender of this call. * if the call came through our trusted forwarder, return the original sender. * otherwise, return `msg.sender`. * should be used in the contract anywhere instead of msg.sender */ function _msgSender() internal override virtual view returns (address payable ret) { if (msg.data.length >= 24 && isTrustedForwarder(msg.sender)) { // At this point we know that the sender is a trusted forwarder, // so we trust that the last bytes of msg.data are the verified sender address. // extract sender address from the end of msg.data assembly { ret := shr(96,calldataload(sub(calldatasize(),20))) } } else { return msg.sender; } } /** * return the msg.data of this call. * if the call came through our trusted forwarder, then the real sender was appended as the last 20 bytes * of the msg.data - so this method will strip those 20 bytes off. * otherwise, return `msg.data` * should be used in the contract instead of msg.data, where the difference matters (e.g. when explicitly * signing or hashing the */ function _msgData() internal override virtual view returns (bytes memory ret) { if (msg.data.length >= 24 && isTrustedForwarder(msg.sender)) { // At this point we know that the sender is a trusted forwarder, // we copy the msg.data , except the last 20 bytes (and update the total length) assembly { let ptr := mload(0x40) // copy only size-20 bytes let size := sub(calldatasize(),20) // structure RLP data as <offset> <length> <bytes> mstore(ptr, 0x20) mstore(add(ptr,32), size) calldatacopy(add(ptr,64), 0, size) return(ptr, add(size,64)) } } else { return msg.data; } } } contract Penalizer is IPenalizer{ string public override versionPenalizer = "2.0.0+opengsn.penalizer.ipenalizer"; using ECDSA for bytes32; function decodeTransaction(bytes memory rawTransaction) private pure returns (Transaction memory transaction) { (transaction.nonce, transaction.gasPrice, transaction.gasLimit, transaction.to, transaction.value, transaction.data) = RLPReader.decodeTransaction(rawTransaction); return transaction; } modifier relayManagerOnly(IRelayHub hub) { require(hub.isRelayManagerStaked(msg.sender), "Unknown relay manager"); _; } function penalizeRepeatedNonce( bytes memory unsignedTx1, bytes memory signature1, bytes memory unsignedTx2, bytes memory signature2, IRelayHub hub ) public override relayManagerOnly(hub) { // Can be called by a relay manager only. // If a relay attacked the system by signing multiple transactions with the same nonce // (so only one is accepted), anyone can grab both transactions from the blockchain and submit them here. // Check whether unsignedTx1 != unsignedTx2, that both are signed by the same address, // and that unsignedTx1.nonce == unsignedTx2.nonce. // If all conditions are met, relay is considered an "offending relay". // The offending relay will be unregistered immediately, its stake will be forfeited and given // to the address who reported it (msg.sender), thus incentivizing anyone to report offending relays. // If reported via a relay, the forfeited stake is split between // msg.sender (the relay used for reporting) and the address that reported it. address addr1 = keccak256(abi.encodePacked(unsignedTx1)).recover(signature1); address addr2 = keccak256(abi.encodePacked(unsignedTx2)).recover(signature2); require(addr1 == addr2, "Different signer"); require(addr1 != address(0), "ecrecover failed"); Transaction memory decodedTx1 = decodeTransaction(unsignedTx1); Transaction memory decodedTx2 = decodeTransaction(unsignedTx2); // checking that the same nonce is used in both transaction, with both signed by the same address // and the actual data is different // note: we compare the hash of the tx to save gas over iterating both byte arrays require(decodedTx1.nonce == decodedTx2.nonce, "Different nonce"); bytes memory dataToCheck1 = abi.encodePacked(decodedTx1.data, decodedTx1.gasLimit, decodedTx1.to, decodedTx1.value); bytes memory dataToCheck2 = abi.encodePacked(decodedTx2.data, decodedTx2.gasLimit, decodedTx2.to, decodedTx2.value); require(keccak256(dataToCheck1) != keccak256(dataToCheck2), "tx is equal"); penalize(addr1, hub); } function penalizeIllegalTransaction( bytes memory unsignedTx, bytes memory signature, IRelayHub hub ) public override relayManagerOnly(hub) { Transaction memory decodedTx = decodeTransaction(unsignedTx); if (decodedTx.to == address(hub)) { bytes4 selector = GsnUtils.getMethodSig(decodedTx.data); bool isWrongMethodCall = selector != IRelayHub.relayCall.selector; bool isGasLimitWrong = GsnUtils.getParam(decodedTx.data, 4) != decodedTx.gasLimit; require( isWrongMethodCall || isGasLimitWrong, "Legal relay transaction"); } address relay = keccak256(abi.encodePacked(unsignedTx)).recover(signature); require(relay != address(0), "ecrecover failed"); penalize(relay, hub); } function penalize(address relayWorker, IRelayHub hub) private { hub.penalize(relayWorker, msg.sender); } } contract RelayHub is IRelayHub { using SafeMath for uint256; string public override versionHub = "2.0.0+opengsn.hub.irelayhub"; uint256 public override minimumStake; uint256 public override minimumUnstakeDelay; uint256 public override maximumRecipientDeposit; uint256 public override gasOverhead; uint256 public override postOverhead; uint256 public override gasReserve; uint256 public override maxWorkerCount; IStakeManager override public stakeManager; address override public penalizer; // maps relay worker's address to its manager's address mapping(address => address) public override workerToManager; // maps relay managers to the number of their workers mapping(address => uint256) public override workerCount; mapping(address => uint256) private balances; constructor ( IStakeManager _stakeManager, address _penalizer, uint256 _maxWorkerCount, uint256 _gasReserve, uint256 _postOverhead, uint256 _gasOverhead, uint256 _maximumRecipientDeposit, uint256 _minimumUnstakeDelay, uint256 _minimumStake ) public { stakeManager = _stakeManager; penalizer = _penalizer; maxWorkerCount = _maxWorkerCount; gasReserve = _gasReserve; postOverhead = _postOverhead; gasOverhead = _gasOverhead; maximumRecipientDeposit = _maximumRecipientDeposit; minimumUnstakeDelay = _minimumUnstakeDelay; minimumStake = _minimumStake; } function registerRelayServer(uint256 baseRelayFee, uint256 pctRelayFee, string calldata url) external override { address relayManager = msg.sender; require( isRelayManagerStaked(relayManager), "relay manager not staked" ); require(workerCount[relayManager] > 0, "no relay workers"); emit RelayServerRegistered(relayManager, baseRelayFee, pctRelayFee, url); } function addRelayWorkers(address[] calldata newRelayWorkers) external override { address relayManager = msg.sender; workerCount[relayManager] = workerCount[relayManager] + newRelayWorkers.length; require(workerCount[relayManager] <= maxWorkerCount, "too many workers"); require( isRelayManagerStaked(relayManager), "relay manager not staked" ); for (uint256 i = 0; i < newRelayWorkers.length; i++) { require(workerToManager[newRelayWorkers[i]] == address(0), "this worker has a manager"); workerToManager[newRelayWorkers[i]] = relayManager; } emit RelayWorkersAdded(relayManager, newRelayWorkers, workerCount[relayManager]); } function depositFor(address target) public override payable { uint256 amount = msg.value; require(amount <= maximumRecipientDeposit, "deposit too big"); balances[target] = balances[target].add(amount); emit Deposited(target, msg.sender, amount); } function balanceOf(address target) external override view returns (uint256) { return balances[target]; } function withdraw(uint256 amount, address payable dest) public override { address payable account = msg.sender; require(balances[account] >= amount, "insufficient funds"); balances[account] = balances[account].sub(amount); dest.transfer(amount); emit Withdrawn(account, dest, amount); } function verifyGasLimits( uint256 paymasterMaxAcceptanceBudget, GsnTypes.RelayRequest calldata relayRequest, uint256 initialGas ) private view returns (IPaymaster.GasLimits memory gasLimits, uint256 maxPossibleGas) { gasLimits = IPaymaster(relayRequest.relayData.paymaster).getGasLimits{gas:50000}(); require(paymasterMaxAcceptanceBudget >= gasLimits.acceptanceBudget, "unexpected high acceptanceBudget"); maxPossibleGas = gasOverhead.add( gasLimits.preRelayedCallGasLimit).add( gasLimits.postRelayedCallGasLimit).add( relayRequest.request.gas); // This transaction must have enough gas to forward the call to the recipient with the requested amount, and not // run out of gas later in this function. require( initialGas >= maxPossibleGas, "Not enough gas left for innerRelayCall to complete"); uint256 maxPossibleCharge = calculateCharge( maxPossibleGas, relayRequest.relayData ); // We don't yet know how much gas will be used by the recipient, so we make sure there are enough funds to pay // for the maximum possible charge. require(maxPossibleCharge <= balances[relayRequest.relayData.paymaster], "Paymaster balance too low"); } struct RelayCallData { bool success; bytes4 functionSelector; bytes recipientContext; bytes relayedCallReturnValue; IPaymaster.GasLimits gasLimits; RelayCallStatus status; uint256 innerGasUsed; uint256 maxPossibleGas; uint256 gasBeforeInner; bytes retData; } function relayCall( uint paymasterMaxAcceptanceBudget, GsnTypes.RelayRequest calldata relayRequest, bytes calldata signature, bytes calldata approvalData, uint externalGasLimit ) external override returns (bool paymasterAccepted, bytes memory returnValue) { (signature); RelayCallData memory vars; vars.functionSelector = MinLibBytes.readBytes4(relayRequest.request.data, 0); require(msg.sender == tx.origin, "relay worker cannot be a smart contract"); require(workerToManager[msg.sender] != address(0), "Unknown relay worker"); require(relayRequest.relayData.relayWorker == msg.sender, "Not a right worker"); require( isRelayManagerStaked(workerToManager[msg.sender]), "relay manager not staked" ); require(relayRequest.relayData.gasPrice <= tx.gasprice, "Invalid gas price"); require(externalGasLimit <= block.gaslimit, "Impossible gas limit"); (vars.gasLimits, vars.maxPossibleGas) = verifyGasLimits(paymasterMaxAcceptanceBudget, relayRequest, externalGasLimit); { //How much gas to pass down to innerRelayCall. must be lower than the default 63/64 // actually, min(gasleft*63/64, gasleft-GAS_RESERVE) might be enough. uint256 innerGasLimit = gasleft()*63/64-gasReserve; vars.gasBeforeInner = gasleft(); uint256 _tmpInitialGas = innerGasLimit + externalGasLimit + gasOverhead + postOverhead; // Calls to the recipient are performed atomically inside an inner transaction which may revert in case of // errors in the recipient. In either case (revert or regular execution) the return data encodes the // RelayCallStatus value. (bool success, bytes memory relayCallStatus) = address(this).call{gas:innerGasLimit}( abi.encodeWithSelector(RelayHub.innerRelayCall.selector, relayRequest, signature, approvalData, vars.gasLimits, _tmpInitialGas - gasleft(), vars.maxPossibleGas ) ); vars.success = success; vars.innerGasUsed = vars.gasBeforeInner-gasleft(); (vars.status, vars.relayedCallReturnValue) = abi.decode(relayCallStatus, (RelayCallStatus, bytes)); if ( vars.relayedCallReturnValue.length>0 ) { emit TransactionResult(vars.status, vars.relayedCallReturnValue); } } { if (!vars.success) { //Failure cases where the PM doesn't pay if ( (vars.innerGasUsed < vars.gasLimits.acceptanceBudget ) && ( vars.status == RelayCallStatus.RejectedByPreRelayed || vars.status == RelayCallStatus.RejectedByForwarder || vars.status == RelayCallStatus.RejectedByRecipientRevert //can only be thrown if rejectOnRecipientRevert==true )) { paymasterAccepted=false; emit TransactionRejectedByPaymaster( workerToManager[msg.sender], relayRequest.relayData.paymaster, relayRequest.request.from, relayRequest.request.to, msg.sender, vars.functionSelector, vars.innerGasUsed, vars.relayedCallReturnValue); return (false, vars.relayedCallReturnValue); } } // We now perform the actual charge calculation, based on the measured gas used uint256 gasUsed = (externalGasLimit - gasleft()) + gasOverhead; uint256 charge = calculateCharge(gasUsed, relayRequest.relayData); balances[relayRequest.relayData.paymaster] = balances[relayRequest.relayData.paymaster].sub(charge); balances[workerToManager[msg.sender]] = balances[workerToManager[msg.sender]].add(charge); emit TransactionRelayed( workerToManager[msg.sender], msg.sender, relayRequest.request.from, relayRequest.request.to, relayRequest.relayData.paymaster, vars.functionSelector, vars.status, charge); return (true, ""); } } struct InnerRelayCallData { uint256 balanceBefore; bytes32 preReturnValue; bool relayedCallSuccess; bytes relayedCallReturnValue; bytes recipientContext; bytes data; bool rejectOnRecipientRevert; } function innerRelayCall( GsnTypes.RelayRequest calldata relayRequest, bytes calldata signature, bytes calldata approvalData, IPaymaster.GasLimits calldata gasLimits, uint256 totalInitialGas, uint256 maxPossibleGas ) external returns (RelayCallStatus, bytes memory) { InnerRelayCallData memory vars; // A new gas measurement is performed inside innerRelayCall, since // due to EIP150 available gas amounts cannot be directly compared across external calls // This external function can only be called by RelayHub itself, creating an internal transaction. Calls to the // recipient (preRelayedCall, the relayedCall, and postRelayedCall) are called from inside this transaction. require(msg.sender == address(this), "Only RelayHub should call this function"); // If either pre or post reverts, the whole internal transaction will be reverted, reverting all side effects on // the recipient. The recipient will still be charged for the used gas by the relay. // The recipient is no allowed to withdraw balance from RelayHub during a relayed transaction. We check pre and // post state to ensure this doesn't happen. vars.balanceBefore = balances[relayRequest.relayData.paymaster]; // First preRelayedCall is executed. // Note: we open a new block to avoid growing the stack too much. vars.data = abi.encodeWithSelector( IPaymaster.preRelayedCall.selector, relayRequest, signature, approvalData, maxPossibleGas ); { bool success; bytes memory retData; (success, retData) = relayRequest.relayData.paymaster.call{gas:gasLimits.preRelayedCallGasLimit}(vars.data); if (!success) { GsnEip712Library.truncateInPlace(retData); revertWithStatus(RelayCallStatus.RejectedByPreRelayed, retData); } (vars.recipientContext, vars.rejectOnRecipientRevert) = abi.decode(retData, (bytes,bool)); } // The actual relayed call is now executed. The sender's address is appended at the end of the transaction data { bool forwarderSuccess; (forwarderSuccess, vars.relayedCallSuccess, vars.relayedCallReturnValue) = GsnEip712Library.execute(relayRequest, signature); if ( !forwarderSuccess ) { revertWithStatus(RelayCallStatus.RejectedByForwarder, vars.relayedCallReturnValue); } if (vars.rejectOnRecipientRevert && !vars.relayedCallSuccess) { //we trusted the recipient, but it reverted... revertWithStatus(RelayCallStatus.RejectedByRecipientRevert, vars.relayedCallReturnValue); } } // Finally, postRelayedCall is executed, with the relayedCall execution's status and a charge estimate // We now determine how much the recipient will be charged, to pass this value to postRelayedCall for accurate // accounting. vars.data = abi.encodeWithSelector( IPaymaster.postRelayedCall.selector, vars.recipientContext, vars.relayedCallSuccess, totalInitialGas - gasleft(), /*gasUseWithoutPost*/ relayRequest.relayData ); { (bool successPost,bytes memory ret) = relayRequest.relayData.paymaster.call{gas:gasLimits.postRelayedCallGasLimit}(vars.data); if (!successPost) { revertWithStatus(RelayCallStatus.PostRelayedFailed, ret); } } if (balances[relayRequest.relayData.paymaster] < vars.balanceBefore) { revertWithStatus(RelayCallStatus.PaymasterBalanceChanged, ""); } return (vars.relayedCallSuccess ? RelayCallStatus.OK : RelayCallStatus.RelayedCallFailed, vars.relayedCallReturnValue); } /** * @dev Reverts the transaction with return data set to the ABI encoding of the status argument (and revert reason data) */ function revertWithStatus(RelayCallStatus status, bytes memory ret) private pure { bytes memory data = abi.encode(status, ret); GsnEip712Library.truncateInPlace(data); assembly { let dataSize := mload(data) let dataPtr := add(data, 32) revert(dataPtr, dataSize) } } function calculateCharge(uint256 gasUsed, GsnTypes.RelayData calldata relayData) public override virtual view returns (uint256) { // relayData.baseRelayFee + (gasUsed * relayData.gasPrice * (100 + relayData.pctRelayFee)) / 100; return relayData.baseRelayFee.add((gasUsed.mul(relayData.gasPrice).mul(relayData.pctRelayFee.add(100))).div(100)); } function isRelayManagerStaked(address relayManager) public override view returns (bool) { return stakeManager.isRelayManagerStaked(relayManager, address(this), minimumStake, minimumUnstakeDelay); } modifier penalizerOnly () { require(msg.sender == penalizer, "Not penalizer"); _; } function penalize(address relayWorker, address payable beneficiary) external override penalizerOnly { address relayManager = workerToManager[relayWorker]; // The worker must be controlled by a manager with a locked stake require(relayManager != address(0), "Unknown relay worker"); require( isRelayManagerStaked(relayManager), "relay manager not staked" ); IStakeManager.StakeInfo memory stakeInfo = stakeManager.getStakeInfo(relayManager); stakeManager.penalizeRelayManager(relayManager, beneficiary, stakeInfo.stake); } } contract StakeManager is IStakeManager { using SafeMath for uint256; string public override versionSM = "2.0.0+opengsn.stakemanager.istakemanager"; /// maps relay managers to their stakes mapping(address => StakeInfo) public stakes; function getStakeInfo(address relayManager) external override view returns (StakeInfo memory stakeInfo) { return stakes[relayManager]; } /// maps relay managers to a map of addressed of their authorized hubs to the information on that hub mapping(address => mapping(address => RelayHubInfo)) public authorizedHubs; /// Put a stake for a relayManager and set its unstake delay. /// If the entry does not exist, it is created, and the caller of this function becomes its owner. /// If the entry already exists, only the owner can call this function. /// @param relayManager - address that represents a stake entry and controls relay registrations on relay hubs /// @param unstakeDelay - number of blocks to elapse before the owner can retrieve the stake after calling 'unlock' function stakeForAddress(address relayManager, uint256 unstakeDelay) external override payable { require(stakes[relayManager].owner == address(0) || stakes[relayManager].owner == msg.sender, "not owner"); require(unstakeDelay >= stakes[relayManager].unstakeDelay, "unstakeDelay cannot be decreased"); require(msg.sender != relayManager, "relayManager cannot stake for itself"); require(stakes[msg.sender].owner == address(0), "sender is a relayManager itself"); stakes[relayManager].owner = msg.sender; stakes[relayManager].stake += msg.value; stakes[relayManager].unstakeDelay = unstakeDelay; emit StakeAdded(relayManager, stakes[relayManager].owner, stakes[relayManager].stake, stakes[relayManager].unstakeDelay); } function unlockStake(address relayManager) external override { StakeInfo storage info = stakes[relayManager]; require(info.owner == msg.sender, "not owner"); require(info.withdrawBlock == 0, "already pending"); info.withdrawBlock = block.number.add(info.unstakeDelay); emit StakeUnlocked(relayManager, msg.sender, info.withdrawBlock); } function withdrawStake(address relayManager) external override { StakeInfo storage info = stakes[relayManager]; require(info.owner == msg.sender, "not owner"); require(info.withdrawBlock > 0, "Withdrawal is not scheduled"); require(info.withdrawBlock <= block.number, "Withdrawal is not due"); uint256 amount = info.stake; delete stakes[relayManager]; msg.sender.transfer(amount); emit StakeWithdrawn(relayManager, msg.sender, amount); } modifier ownerOnly (address relayManager) { StakeInfo storage info = stakes[relayManager]; require(info.owner == msg.sender, "not owner"); _; } modifier managerOnly () { StakeInfo storage info = stakes[msg.sender]; require(info.owner != address(0), "not manager"); _; } function authorizeHubByOwner(address relayManager, address relayHub) external ownerOnly(relayManager) override { _authorizeHub(relayManager, relayHub); } function authorizeHubByManager(address relayHub) external managerOnly override { _authorizeHub(msg.sender, relayHub); } function _authorizeHub(address relayManager, address relayHub) internal { authorizedHubs[relayManager][relayHub].removalBlock = uint(-1); emit HubAuthorized(relayManager, relayHub); } function unauthorizeHubByOwner(address relayManager, address relayHub) external override ownerOnly(relayManager) { _unauthorizeHub(relayManager, relayHub); } function unauthorizeHubByManager(address relayHub) external override managerOnly { _unauthorizeHub(msg.sender, relayHub); } function _unauthorizeHub(address relayManager, address relayHub) internal { RelayHubInfo storage hubInfo = authorizedHubs[relayManager][relayHub]; require(hubInfo.removalBlock == uint(-1), "hub not authorized"); uint256 removalBlock = block.number.add(stakes[relayManager].unstakeDelay); hubInfo.removalBlock = removalBlock; emit HubUnauthorized(relayManager, relayHub, removalBlock); } function isRelayManagerStaked(address relayManager, address relayHub, uint256 minAmount, uint256 minUnstakeDelay) external override view returns (bool) { StakeInfo storage info = stakes[relayManager]; bool isAmountSufficient = info.stake >= minAmount; bool isDelaySufficient = info.unstakeDelay >= minUnstakeDelay; bool isStakeLocked = info.withdrawBlock == 0; bool isHubAuthorized = authorizedHubs[relayManager][relayHub].removalBlock == uint(-1); return isAmountSufficient && isDelaySufficient && isStakeLocked && isHubAuthorized; } /// Slash the stake of the relay relayManager. In order to prevent stake kidnapping, burns half of stake on the way. /// @param relayManager - entry to penalize /// @param beneficiary - address that receives half of the penalty amount /// @param amount - amount to withdraw from stake function penalizeRelayManager(address relayManager, address payable beneficiary, uint256 amount) external override { uint256 removalBlock = authorizedHubs[relayManager][msg.sender].removalBlock; require(removalBlock != 0, "hub not authorized"); require(removalBlock > block.number, "hub authorization expired"); // Half of the stake will be burned (sent to address 0) require(stakes[relayManager].stake >= amount, "penalty exceeds stake"); stakes[relayManager].stake = SafeMath.sub(stakes[relayManager].stake, amount); uint256 toBurn = SafeMath.div(amount, 2); uint256 reward = SafeMath.sub(amount, toBurn); // Ether is burned and transferred address(0).transfer(toBurn); beneficiary.transfer(reward); emit StakePenalized(relayManager, beneficiary, reward); } } contract Forwarder is IForwarder { using ECDSA for bytes32; string public constant GENERIC_PARAMS = "address from,address to,uint256 value,uint256 gas,uint256 nonce,bytes data"; string public constant EIP712_DOMAIN_TYPE = "EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"; mapping(bytes32 => bool) public typeHashes; mapping(bytes32 => bool) public domains; // Nonces of senders, used to prevent replay attacks mapping(address => uint256) private nonces; // solhint-disable-next-line no-empty-blocks receive() external payable {} function getNonce(address from) public view override returns (uint256) { return nonces[from]; } constructor() public { string memory requestType = string(abi.encodePacked("ForwardRequest(", GENERIC_PARAMS, ")")); registerRequestTypeInternal(requestType); } function verify( ForwardRequest memory req, bytes32 domainSeparator, bytes32 requestTypeHash, bytes calldata suffixData, bytes calldata sig) external override view { _verifyNonce(req); _verifySig(req, domainSeparator, requestTypeHash, suffixData, sig); } function execute( ForwardRequest memory req, bytes32 domainSeparator, bytes32 requestTypeHash, bytes calldata suffixData, bytes calldata sig ) external payable override returns (bool success, bytes memory ret) { _verifyNonce(req); _verifySig(req, domainSeparator, requestTypeHash, suffixData, sig); _updateNonce(req); // solhint-disable-next-line avoid-low-level-calls (success,ret) = req.to.call{gas : req.gas, value : req.value}(abi.encodePacked(req.data, req.from)); if ( address(this).balance>0 ) { //can't fail: req.from signed (off-chain) the request, so it must be an EOA... payable(req.from).transfer(address(this).balance); } return (success,ret); } function _verifyNonce(ForwardRequest memory req) internal view { require(nonces[req.from] == req.nonce, "nonce mismatch"); } function _updateNonce(ForwardRequest memory req) internal { nonces[req.from]++; } function registerRequestType(string calldata typeName, string calldata typeSuffix) external override { for (uint i = 0; i < bytes(typeName).length; i++) { bytes1 c = bytes(typeName)[i]; require(c != "(" && c != ")", "invalid typename"); } string memory requestType = string(abi.encodePacked(typeName, "(", GENERIC_PARAMS, ",", typeSuffix)); registerRequestTypeInternal(requestType); } function registerDomainSeparator(string calldata name, string calldata version) external override { uint256 chainId; /* solhint-disable-next-line no-inline-assembly */ assembly { chainId := chainid() } bytes memory domainValue = abi.encode( keccak256(bytes(EIP712_DOMAIN_TYPE)), keccak256(bytes(name)), keccak256(bytes(version)), chainId, address(this)); bytes32 domainHash = keccak256(domainValue); domains[domainHash] = true; emit DomainRegistered(domainHash, domainValue); } function registerRequestTypeInternal(string memory requestType) internal { bytes32 requestTypehash = keccak256(bytes(requestType)); typeHashes[requestTypehash] = true; emit RequestTypeRegistered(requestTypehash, requestType); } event DomainRegistered(bytes32 indexed domainSeparator, bytes domainValue); event RequestTypeRegistered(bytes32 indexed typeHash, string typeStr); function _verifySig( ForwardRequest memory req, bytes32 domainSeparator, bytes32 requestTypeHash, bytes memory suffixData, bytes memory sig) internal view { require(domains[domainSeparator], "unregistered domain separator"); require(typeHashes[requestTypeHash], "unregistered request typehash"); bytes32 digest = keccak256(abi.encodePacked( "\x19\x01", domainSeparator, keccak256(_getEncoded(req, requestTypeHash, suffixData)) )); require(digest.recover(sig) == req.from, "signature mismatch"); } function _getEncoded( ForwardRequest memory req, bytes32 requestTypeHash, bytes memory suffixData ) public pure returns ( bytes memory ) { return abi.encodePacked( requestTypeHash, abi.encode( req.from, req.to, req.value, req.gas, req.nonce, keccak256(req.data) ), suffixData ); } } contract TestForwarderTarget is BaseRelayRecipient { string public override versionRecipient = "2.0.0+opengsn.test.recipient"; constructor(address forwarder) public { trustedForwarder = forwarder; } // solhint-disable-next-line no-empty-blocks receive() external payable {} event TestForwarderMessage(string message, address realSender, address msgSender, address origin); function emitMessage(string memory message) public { // solhint-disable-next-line avoid-tx-origin emit TestForwarderMessage(message, _msgSender(), msg.sender, tx.origin); } function publicMsgSender() public view returns (address) { return _msgSender(); } function publicMsgData() public view returns (bytes memory) { return _msgData(); } function mustReceiveEth(uint value) public payable { require( msg.value == value, "didn't receive value"); } event Reverting(string message); function testRevert() public { require(address(this) == address(0), "always fail"); emit Reverting("if you see this revert failed..."); } } contract BatchForwarder is Forwarder, BaseRelayRecipient { string public override versionRecipient = "2.0.0+opengsn.batched.irelayrecipient"; constructor() public { //needed for sendBatch trustedForwarder = address(this); } function sendBatch(address[] calldata targets, bytes[] calldata encodedFunctions) external { require(targets.length == encodedFunctions.length); address sender = _msgSender(); for (uint i = 0; i < targets.length; i++) { // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory ret) = targets[i].call(abi.encodePacked(encodedFunctions[i], sender)); // TODO: currently, relayed transaction does not report exception string. when it does, this // will propagate the inner call exception description if (!success){ //re-throw the revert with the same revert reason. GsnUtils.revertWithData(ret); } } } }

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{"success": true, "error": null, "results": {"detectors": [{"check": "reentrancy-no-eth", "impact": "Medium", "confidence": "Medium"}, {"check": "arbitrary-send", "impact": "High", "confidence": "Medium"}, {"check": "incorrect-equality", "impact": "Medium", "confidence": "High"}, {"check": "uninitialized-local", "impact": "Medium", "confidence": "Medium"}, {"check": "locked-ether", "impact": "Medium", "confidence": "High"}]}}

0x7c70c4d4f53ae4491348426f8e86229229ac5ccc

pragma solidity 0.6.11; pragma experimental ABIEncoderV2; struct FullAbsoluteTokenAmount { AbsoluteTokenAmountMeta base; AbsoluteTokenAmountMeta[] underlying; } struct AbsoluteTokenAmountMeta { AbsoluteTokenAmount absoluteTokenAmount; ERC20Metadata erc20metadata; } struct ERC20Metadata { string name; string symbol; uint8 decimals; } struct AdapterBalance { bytes32 protocolAdapterName; AbsoluteTokenAmount[] absoluteTokenAmounts; } struct AbsoluteTokenAmount { address token; uint256 amount; } struct Component { address token; uint256 rate; } struct TransactionData { Action[] actions; TokenAmount[] inputs; Fee fee; AbsoluteTokenAmount[] requiredOutputs; uint256 nonce; } struct Action { bytes32 protocolAdapterName; ActionType actionType; TokenAmount[] tokenAmounts; bytes data; } struct TokenAmount { address token; uint256 amount; AmountType amountType; } struct Fee { uint256 share; address beneficiary; } enum ActionType { None, Deposit, Withdraw } enum AmountType { None, Relative, Absolute } abstract contract ProtocolAdapter { /** * @dev MUST return amount and type of the given token * locked on the protocol by the given account. */ function getBalance( address token, address account ) public view virtual returns (uint256); } contract UniswapExchangeAdapter is ProtocolAdapter { /** * @notice This function is unavailable for exchange adapter. * @dev Implementation of ProtocolAdapter abstract contract function. */ function getBalance( address, address ) public view override returns (uint256) { revert("UEA: no balance"); } } abstract contract InteractiveAdapter is ProtocolAdapter { uint256 internal constant DELIMITER = 1e18; address internal constant ETH = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; /** * @dev The function must deposit assets to the protocol. * @return MUST return assets to be sent back to the `msg.sender`. */ function deposit( TokenAmount[] memory tokenAmounts, bytes memory data ) public payable virtual returns (address[] memory); /** * @dev The function must withdraw assets from the protocol. * @return MUST return assets to be sent back to the `msg.sender`. */ function withdraw( TokenAmount[] memory tokenAmounts, bytes memory data ) public payable virtual returns (address[] memory); function getAbsoluteAmountDeposit( TokenAmount memory tokenAmount ) internal view virtual returns (uint256) { address token = tokenAmount.token; uint256 amount = tokenAmount.amount; AmountType amountType = tokenAmount.amountType; require( amountType == AmountType.Relative || amountType == AmountType.Absolute, "IA: bad amount type" ); if (amountType == AmountType.Relative) { require(amount <= DELIMITER, "IA: bad amount"); uint256 balance; if (token == ETH) { balance = address(this).balance; } else { balance = ERC20(token).balanceOf(address(this)); } if (amount == DELIMITER) { return balance; } else { return mul(balance, amount) / DELIMITER; } } else { return amount; } } function getAbsoluteAmountWithdraw( TokenAmount memory tokenAmount ) internal view virtual returns (uint256) { address token = tokenAmount.token; uint256 amount = tokenAmount.amount; AmountType amountType = tokenAmount.amountType; require( amountType == AmountType.Relative || amountType == AmountType.Absolute, "IA: bad amount type" ); if (amountType == AmountType.Relative) { require(amount <= DELIMITER, "IA: bad amount"); uint256 balance = getBalance(token, address(this)); if (amount == DELIMITER) { return balance; } else { return mul(balance, amount) / DELIMITER; } } else { return amount; } } function mul( uint256 a, uint256 b ) internal pure returns (uint256) { if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "IA: mul overflow"); return c; } } interface UniswapV2Router01 { function swapExactTokensForTokens( uint, uint, address[] calldata, address, uint ) external returns (uint[] memory); function swapTokensForExactTokens( uint, uint, address[] calldata, address, uint ) external returns (uint[] memory); } contract UniswapV2ExchangeInteractiveAdapter is InteractiveAdapter, UniswapExchangeAdapter { using SafeERC20 for ERC20; address internal constant ROUTER = 0xf164fC0Ec4E93095b804a4795bBe1e041497b92a; /** * @notice Exchange tokens using Uniswap pool. * @param tokenAmounts Array with one element - TokenAmount struct with * "from" token address, "from" token amount, and amount type. * @param data Uniswap exchange path starting from tokens[0] (ABI-encoded). * @return tokensToBeWithdrawn Array with one element - token address to be exchanged to. * @dev Implementation of InteractiveAdapter function. */ function deposit( TokenAmount[] memory tokenAmounts, bytes memory data ) public payable override returns (address[] memory tokensToBeWithdrawn) { require(tokenAmounts.length == 1, "UEIA: should be 1 tokenAmount"); address[] memory path = abi.decode(data, (address[])); address token = tokenAmounts[0].token; require(token == path[0], "UEIA: bad path[0]"); uint256 amount = getAbsoluteAmountDeposit(tokenAmounts[0]); tokensToBeWithdrawn = new address[](1); tokensToBeWithdrawn[0] = path[path.length - 1]; ERC20(token).safeApprove(ROUTER, amount, "UEIA[1]"); try UniswapV2Router01(ROUTER).swapExactTokensForTokens( amount, 0, path, address(this), // solhint-disable-next-line not-rely-on-time now ) returns (uint256[] memory) { // solhint-disable-line no-empty-blocks } catch Error(string memory reason) { revert(reason); } catch { revert("UEIA: deposit fail"); } } /** * @notice Exchange tokens using Uniswap pool. * @param tokenAmounts Array with one element - TokenAmount struct with * "to" token address, "to" token amount, and amount type (must be absolute). * @param data Uniswap exchange path ending with tokens[0] (ABI-encoded). * @return tokensToBeWithdrawn Array with one element - token address to be changed to. * @dev Implementation of InteractiveAdapter function. */ function withdraw( TokenAmount[] memory tokenAmounts, bytes memory data ) public payable override returns (address[] memory tokensToBeWithdrawn) { require(tokenAmounts.length == 1, "UEIA: should be 1 tokenAmount"); require(tokenAmounts[0].amountType == AmountType.Absolute, "UEIA: bad type"); address[] memory path = abi.decode(data, (address[])); address token = tokenAmounts[0].token; require(token == path[path.length - 1], "UEIA: bad path[path.length - 1]"); uint256 amount = tokenAmounts[0].amount; tokensToBeWithdrawn = new address[](1); tokensToBeWithdrawn[0] = token; ERC20(path[0]).safeApprove(ROUTER, ERC20(path[0]).balanceOf(address(this)), "UEIA[2]"); try UniswapV2Router01(ROUTER).swapTokensForExactTokens( amount, type(uint256).max, path, address(this), // solhint-disable-next-line not-rely-on-time now ) returns (uint256[] memory) { //solhint-disable-line no-empty-blocks } catch Error(string memory reason) { revert(reason); } catch { revert("UEIA: withdraw fail"); } ERC20(path[0]).safeApprove(ROUTER, 0, "UEIA[3]"); } } interface ERC20 { function approve(address, uint256) external returns (bool); function transfer(address, uint256) external returns (bool); function transferFrom(address, address, uint256) external returns (bool); function name() external view returns (string memory); function symbol() external view returns (string memory); function decimals() external view returns (uint8); function totalSupply() external view returns (uint256); function balanceOf(address) external view returns (uint256); function allowance(address, address) external view returns (uint256); } library SafeERC20 { function safeTransfer( ERC20 token, address to, uint256 value, string memory location ) internal { callOptionalReturn( token, abi.encodeWithSelector( token.transfer.selector, to, value ), "transfer", location ); } function safeTransferFrom( ERC20 token, address from, address to, uint256 value, string memory location ) internal { callOptionalReturn( token, abi.encodeWithSelector( token.transferFrom.selector, from, to, value ), "transferFrom", location ); } function safeApprove( ERC20 token, address spender, uint256 value, string memory location ) internal { require( (value == 0) || (token.allowance(address(this), spender) == 0), "SafeERC20: bad approve call" ); callOptionalReturn( token, abi.encodeWithSelector( token.approve.selector, spender, value ), "approve", location ); } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), * relaxing the requirement on the return value: the return value is optional * (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). * @param location Location of the call (for debug). */ function callOptionalReturn( ERC20 token, bytes memory data, string memory functionName, string memory location ) private { // We need to perform a low level call here, to bypass Solidity's return data size checking // mechanism, since we're implementing it ourselves. // We implement two-steps call as callee is a contract is a responsibility of a caller. // 1. The call itself is made, and success asserted // 2. The return value is decoded, which in turn checks the size of the returned data. // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = address(token).call(data); require( success, string( abi.encodePacked( "SafeERC20: ", functionName, " failed in ", location ) ) ); if (returndata.length > 0) { // Return data is optional require( abi.decode(returndata, (bool)), string( abi.encodePacked( "SafeERC20: ", functionName, " returned false in ", location ) ) ); } } }

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{"success": true, "error": null, "results": {"detectors": [{"check": "unused-return", "impact": "Medium", "confidence": "Medium"}, {"check": "incorrect-equality", "impact": "Medium", "confidence": "High"}, {"check": "uninitialized-local", "impact": "Medium", "confidence": "Medium"}, {"check": "locked-ether", "impact": "Medium", "confidence": "High"}]}}

0x7cba41b2882c337631fccde730c11ffb7527b48f

pragma solidity 0.6.12; pragma experimental ABIEncoderV2; contract IAbacusOracle{ uint public callFee; function getJobResponse(uint64 _jobId) public view returns(uint64[] memory _values){ } function scheduleFunc(address to ,uint callTime, bytes memory data , uint fee , uint gaslimit ,uint gasprice)public payable{} } contract Initializable { /** * @dev Indicates that the contract has been initialized. */ bool private initialized; /** * @dev Indicates that the contract is in the process of being initialized. */ bool private initializing; /** * @dev Modifier to use in the initializer function of a contract. */ modifier initializer() { require(initializing || isConstructor() || !initialized, "Contract instance has already been initialized"); bool isTopLevelCall = !initializing; if (isTopLevelCall) { initializing = true; initialized = true; } _; if (isTopLevelCall) { initializing = false; } } /// @dev Returns true if and only if the function is running in the constructor function isConstructor() private view returns (bool) { // extcodesize checks the size of the code stored in an address, and // address returns the current address. Since the code is still not // deployed when running a constructor, any checks on its code size will // yield zero, making it an effective way to detect if a contract is // under construction or not. address self = address(this); uint256 cs; assembly { cs := extcodesize(self) } return cs == 0; } // Reserved storage space to allow for layout changes in the future. uint256[50] private ______gap; } abstract contract Context { function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } abstract contract AccessControl is Context { using EnumerableSet for EnumerableSet.AddressSet; using Address for address; struct RoleData { EnumerableSet.AddressSet members; bytes32 adminRole; } mapping (bytes32 => RoleData) private _roles; bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00; /** * @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole` * * `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite * {RoleAdminChanged} not being emitted signaling this. * * _Available since v3.1._ */ event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole); /** * @dev Emitted when `account` is granted `role`. * * `sender` is the account that originated the contract call, an admin role * bearer except when using {_setupRole}. */ event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender); /** * @dev Emitted when `account` is revoked `role`. * * `sender` is the account that originated the contract call: * - if using `revokeRole`, it is the admin role bearer * - if using `renounceRole`, it is the role bearer (i.e. `account`) */ event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender); /** * @dev Returns `true` if `account` has been granted `role`. */ function hasRole(bytes32 role, address account) public view returns (bool) { return _roles[role].members.contains(account); } /** * @dev Returns the number of accounts that have `role`. Can be used * together with {getRoleMember} to enumerate all bearers of a role. */ function getRoleMemberCount(bytes32 role) public view returns (uint256) { return _roles[role].members.length(); } /** * @dev Returns one of the accounts that have `role`. `index` must be a * value between 0 and {getRoleMemberCount}, non-inclusive. * * Role bearers are not sorted in any particular way, and their ordering may * change at any point. * * WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure * you perform all queries on the same block. See the following * https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post] * for more information. */ function getRoleMember(bytes32 role, uint256 index) public view returns (address) { return _roles[role].members.at(index); } /** * @dev Returns the admin role that controls `role`. See {grantRole} and * {revokeRole}. * * To change a role's admin, use {_setRoleAdmin}. */ function getRoleAdmin(bytes32 role) public view returns (bytes32) { return _roles[role].adminRole; } /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function grantRole(bytes32 role, address account) public virtual { require(hasRole(_roles[role].adminRole, _msgSender()), "AccessControl: sender must be an admin to grant"); _grantRole(role, account); } /** * @dev Revokes `role` from `account`. * * If `account` had been granted `role`, emits a {RoleRevoked} event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function revokeRole(bytes32 role, address account) public virtual { require(hasRole(_roles[role].adminRole, _msgSender()), "AccessControl: sender must be an admin to revoke"); _revokeRole(role, account); } /** * @dev Revokes `role` from the calling account. * * Roles are often managed via {grantRole} and {revokeRole}: this function's * purpose is to provide a mechanism for accounts to lose their privileges * if they are compromised (such as when a trusted device is misplaced). * * If the calling account had been granted `role`, emits a {RoleRevoked} * event. * * Requirements: * * - the caller must be `account`. */ function renounceRole(bytes32 role, address account) public virtual { require(account == _msgSender(), "AccessControl: can only renounce roles for self"); _revokeRole(role, account); } /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. Note that unlike {grantRole}, this function doesn't perform any * checks on the calling account. * * [WARNING] * ==== * This function should only be called from the constructor when setting * up the initial roles for the system. * * Using this function in any other way is effectively circumventing the admin * system imposed by {AccessControl}. * ==== */ function _setupRole(bytes32 role, address account) internal virtual { _grantRole(role, account); } /** * @dev Sets `adminRole` as ``role``'s admin role. * * Emits a {RoleAdminChanged} event. */ function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual { emit RoleAdminChanged(role, _roles[role].adminRole, adminRole); _roles[role].adminRole = adminRole; } function _grantRole(bytes32 role, address account) private { if (_roles[role].members.add(account)) { emit RoleGranted(role, account, _msgSender()); } } function _revokeRole(bytes32 role, address account) private { if (_roles[role].members.remove(account)) { emit RoleRevoked(role, account, _msgSender()); } } } contract ERC20Basic { uint public _totalSupply; string public name; string public symbol; uint public decimals; function totalSupply() public view returns (uint){} function balanceOf(address who) public view returns (uint){} function transfer(address to, uint value) public {} function transferFrom(address _from, address _to, uint _value) public{} function approve(address spender, uint amount) public {} function allowance(address _owner, address _spender) public view returns (uint remaining) {} event Transfer(address indexed from, address indexed to, uint value); } interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } contract ERC20 is Context, IERC20 { using SafeMath for uint256; using Address for address; mapping (address => uint256) private _balances; mapping (address => uint256) public lockedAmount; mapping (address => mapping (address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; uint8 private _decimals; /** * @dev Sets the values for {name} and {symbol}, initializes {decimals} with * a default value of 18. * * To select a different value for {decimals}, use {_setupDecimals}. * * All three of these values are immutable: they can only be set once during * construction. */ constructor (string memory name, string memory symbol,uint8 decimals) public { _name = name; _symbol = symbol; _decimals = decimals; } /** * @dev Returns the name of the token. */ function name() public view returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5,05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is * called. * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view returns (uint8) { return _decimals; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `recipient` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address recipient, uint256 amount) public virtual override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { _approve(_msgSender(), spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}; * * Requirements: * - `sender` and `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. * - the caller must have allowance for ``sender``'s tokens of at least * `amount`. */ function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) { _transfer(sender, recipient, amount); _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance")); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function availableAmount(address owner) public view returns(uint256){ return balanceOf(owner).sub(lockedAmount[owner]); } function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue)); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero")); return true; } /** * @dev Moves tokens `amount` from `sender` to `recipient`. * * This is internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `sender` cannot be the zero address. * - `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. */ function _transfer(address sender, address recipient, uint256 amount) internal virtual { require(sender != address(0), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); require(amount <= availableAmount(sender),"ERC20 : amount exceeds available amount"); _beforeTokenTransfer(sender, recipient, amount); _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance"); _balances[recipient] = _balances[recipient].add(amount); emit Transfer(sender, recipient, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements * * - `to` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply = _totalSupply.add(amount); _balances[account] = _balances[account].add(amount); emit Transfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); require(amount <= availableAmount(account),"ERC20 : burn exceeds available amount"); _beforeTokenTransfer(account, address(0), amount); _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance"); _totalSupply = _totalSupply.sub(amount); emit Transfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens. * * This is internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve(address owner, address spender, uint256 amount) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); require(amount <= availableAmount(owner),"ERC20 : approve amount exceeds available amount"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } function _lock(address owner,uint256 amount) internal virtual { require(owner != address(0), "ERC20: lock for zero address"); require(amount <= availableAmount(owner),"ERC20: lock value more tha available amount"); lockedAmount[owner] = lockedAmount[owner].add(amount); } function _release(address owner,uint256 amount) internal virtual{ require(owner != address(0), "ERC20: release for zero address"); require(amount <= lockedAmount[owner],"ERC20 : release value more then locked value"); lockedAmount[owner] = lockedAmount[owner].sub(amount); } /** * @dev Sets {decimals} to a value other than the default one of 18. * * WARNING: This function should only be called from the constructor. Most * applications that interact with token contracts will not expect * {decimals} to ever change, and may work incorrectly if it does. */ function _setupDecimals(uint8 decimals_) internal { _decimals = decimals_; } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be to transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { } } library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // According to EIP-1052, 0x0 is the value returned for not-yet created accounts // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned // for accounts without code, i.e. `keccak256('')` bytes32 codehash; bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470; // solhint-disable-next-line no-inline-assembly assembly { codehash := extcodehash(account) } return (codehash != accountHash && codehash != 0x0); } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain`call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return _functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); return _functionCallWithValue(target, data, value, errorMessage); } function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) { require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: weiValue }(data); if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } library EnumerableSet { // To implement this library for multiple types with as little code // repetition as possible, we write it in terms of a generic Set type with // bytes32 values. // The Set implementation uses private functions, and user-facing // implementations (such as AddressSet) are just wrappers around the // underlying Set. // This means that we can only create new EnumerableSets for types that fit // in bytes32. struct Set { // Storage of set values bytes32[] _values; // Position of the value in the `values` array, plus 1 because index 0 // means a value is not in the set. mapping (bytes32 => uint256) _indexes; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function _add(Set storage set, bytes32 value) private returns (bool) { if (!_contains(set, value)) { set._values.push(value); // The value is stored at length-1, but we add 1 to all indexes // and use 0 as a sentinel value set._indexes[value] = set._values.length; return true; } else { return false; } } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function _remove(Set storage set, bytes32 value) private returns (bool) { // We read and store the value's index to prevent multiple reads from the same storage slot uint256 valueIndex = set._indexes[value]; if (valueIndex != 0) { // Equivalent to contains(set, value) // To delete an element from the _values array in O(1), we swap the element to delete with the last one in // the array, and then remove the last element (sometimes called as 'swap and pop'). // This modifies the order of the array, as noted in {at}. uint256 toDeleteIndex = valueIndex - 1; uint256 lastIndex = set._values.length - 1; // When the value to delete is the last one, the swap operation is unnecessary. However, since this occurs // so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement. bytes32 lastvalue = set._values[lastIndex]; // Move the last value to the index where the value to delete is set._values[toDeleteIndex] = lastvalue; // Update the index for the moved value set._indexes[lastvalue] = toDeleteIndex + 1; // All indexes are 1-based // Delete the slot where the moved value was stored set._values.pop(); // Delete the index for the deleted slot delete set._indexes[value]; return true; } else { return false; } } /** * @dev Returns true if the value is in the set. O(1). */ function _contains(Set storage set, bytes32 value) private view returns (bool) { return set._indexes[value] != 0; } /** * @dev Returns the number of values on the set. O(1). */ function _length(Set storage set) private view returns (uint256) { return set._values.length; } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function _at(Set storage set, uint256 index) private view returns (bytes32) { require(set._values.length > index, "EnumerableSet: index out of bounds"); return set._values[index]; } // AddressSet struct AddressSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(AddressSet storage set, address value) internal returns (bool) { return _add(set._inner, bytes32(uint256(value))); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(AddressSet storage set, address value) internal returns (bool) { return _remove(set._inner, bytes32(uint256(value))); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(AddressSet storage set, address value) internal view returns (bool) { return _contains(set._inner, bytes32(uint256(value))); } /** * @dev Returns the number of values in the set. O(1). */ function length(AddressSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(AddressSet storage set, uint256 index) internal view returns (address) { return address(uint256(_at(set._inner, index))); } // UintSet struct UintSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(UintSet storage set, uint256 value) internal returns (bool) { return _add(set._inner, bytes32(value)); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(UintSet storage set, uint256 value) internal returns (bool) { return _remove(set._inner, bytes32(value)); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(UintSet storage set, uint256 value) internal view returns (bool) { return _contains(set._inner, bytes32(value)); } /** * @dev Returns the number of values on the set. O(1). */ function length(UintSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(UintSet storage set, uint256 index) internal view returns (uint256) { return uint256(_at(set._inner, index)); } } library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } contract Pausable is Context { /** * @dev Emitted when the pause is triggered by `account`. */ event Paused(address account); /** * @dev Emitted when the pause is lifted by `account`. */ event Unpaused(address account); bool private _paused; /** * @dev Initializes the contract in unpaused state. */ constructor () internal { _paused = false; } /** * @dev Returns true if the contract is paused, and false otherwise. */ function paused() public view returns (bool) { return _paused; } /** * @dev Modifier to make a function callable only when the contract is not paused. * * Requirements: * * - The contract must not be paused. */ modifier whenNotPaused() { require(!_paused, "Pausable: paused"); _; } /** * @dev Modifier to make a function callable only when the contract is paused. * * Requirements: * * - The contract must be paused. */ modifier whenPaused() { require(_paused, "Pausable: not paused"); _; } /** * @dev Triggers stopped state. * * Requirements: * * - The contract must not be paused. */ function _pause() internal virtual whenNotPaused { _paused = true; emit Paused(_msgSender()); } /** * @dev Returns to normal state. * * Requirements: * * - The contract must be paused. */ function _unpause() internal virtual whenPaused { _paused = false; emit Unpaused(_msgSender()); } } abstract contract ERC20Pausable is ERC20, Pausable { /** * @dev See {ERC20-_beforeTokenTransfer}. * * Requirements: * * - the contract must not be paused. */ function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual override { super._beforeTokenTransfer(from, to, amount); require(!paused(), "ERC20Pausable: token transfer while paused"); } } contract wERC20 is Context, AccessControl, ERC20, ERC20Pausable { bytes32 public constant MINTER_ROLE = keccak256("MINTER_ROLE"); bytes32 public constant PAUSER_ROLE = keccak256("PAUSER_ROLE"); bytes32 public constant ETMOWNER_ROLE = keccak256("ETM_ROLE"); /** * @dev Grants `DEFAULT_ADMIN_ROLE`, `MINTER_ROLE` and `PAUSER_ROLE` to the * account that deploys the contract. * * See {ERC20-constructor}. */ constructor(string memory name, string memory symbol,uint8 decimals,address admin,address etmOwner) public ERC20(name, symbol,decimals) { _setupRole(DEFAULT_ADMIN_ROLE, admin); _setupRole(ETMOWNER_ROLE, etmOwner); _setupRole(MINTER_ROLE, admin); _setupRole(PAUSER_ROLE, admin); } /** * @dev Creates `amount` new tokens for `to`. * * See {ERC20-_mint}. * * Requirements: * * - the caller must have the `MINTER_ROLE`. */ function mint(address to, uint256 amount) public virtual { require(hasRole(MINTER_ROLE, _msgSender()), "ERC20PresetMinterPauser: must have minter role to mint"); _mint(to, amount); } function burnFrom(address _from,uint256 amount) public virtual{ require(hasRole(MINTER_ROLE, _msgSender()), "ERC20PresetMinterPauser: must have admin role to burn"); _burn(_from,amount); } /** * @dev Pauses all token transfers. * * See {ERC20Pausable} and {Pausable-_pause}. * * Requirements: * * - the caller must have the `PAUSER_ROLE`. */ function pause() public virtual { require(hasRole(PAUSER_ROLE, _msgSender()), "ERC20PresetMinterPauser: must have pauser role to pause"); _pause(); } function changeAdmin(address admin) public virtual{ require(hasRole(ETMOWNER_ROLE, _msgSender()), "ERC20PresetMinterPauser: must have admin role"); _setupRole(DEFAULT_ADMIN_ROLE, admin); _setupRole(MINTER_ROLE, admin); _setupRole(PAUSER_ROLE, admin); } /** * @dev Unpauses all token transfers. * * See {ERC20Pausable} and {Pausable-_unpause}. * * Requirements: * * - the caller must have the `PAUSER_ROLE`. */ function unpause() public virtual { require(hasRole(PAUSER_ROLE, _msgSender()), "ERC20PresetMinterPauser: must have pauser role to unpause"); _unpause(); } function lock(address account , uint256 amount) public virtual{ require(hasRole(MINTER_ROLE, _msgSender()), "ERC20PresetMinterPauser: must have admin role to lock"); _lock(account,amount); } function release(address account , uint256 amount) public virtual{ require(hasRole(MINTER_ROLE, _msgSender()), "ERC20PresetMinterPauser: must have admin role to release"); _release(account,amount); } function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual override(ERC20, ERC20Pausable) { super._beforeTokenTransfer(from, to, amount); } } nt) public orderUSDValue; /*=========Structs and Initializer================ --------------------------------*/ struct freeStorage{ //USER DEPOSIT / BORROW STRUCTURE uint amount; uint time; string wtoken; uint usdvalue; } struct matchedOrder{ //RUNNING OR MATCHED ORDERS IN THIS FORM address supplier; address borrower; uint time; uint expiryDate; uint duration; uint amount; uint usdvalue; uint yield; string wtoken; uint duesPaid; } struct Order{ // PENDING ORDERS IN THIS FORMAT address creator; uint duration; uint amount; uint yield; string wtoken; } struct User{ uint totalDeposit; //USD VALUE OF TOTAL DEPOSIT AT DEPOSIT TIME uint totalBorrowed; //USD VALUE OF TOTAL DEPOSIT AT BORROW TIME freeStorage [] myDeposits; //DEPOSIT DATA freeStorage [] myBorrows; //BORROW DATA mapping(string => uint) deposits; //CURRENCY-WISE TOTAL DEPOSIT COUNT FULL VALUE mapping(string => uint) borrows; //CURRENCY-WISE TOTAL BORROW COUNT FULL VALUE uint64 [] borrowedOrders; //BORROWED ORDER - ORDER ID uint64 [] createdOrders; //CREATED ORDER - ORDER ID uint64 [] myOrders; //MATCHED ORDR - ORDER ID } function initializeAddress(address payable EMMaddress,address AbacusAddress, address payable Initaddress) external initializer{ EMM = EcoMoneyManager(EMMaddress); abacus = IAbacusOracle(AbacusAddress); Init = EcoceliumInit(Initaddress); } /*============Main Functions=============== Key Notes - 1) Always call main functions of Data Manager with Wrapped Token 2) _status signifies (status == Status.OPENCREATOR) operation - Returns True for Deposit Functions and False for Borrow Function 3) require(Init.friendlyaddress(msg.sender) ,"Not Friendly Address"); - This is mentioned in the EcoceliumInit Contract 4) FreePusher/Popper are for Liquidity Pools and push/pop order and matchOrder is the Order Matching Engine 5) Fetch Token Price Returns Values in 10**8 6) Amounts are without setting off Token Decimals ---------------------------------*/ function freePusher(address userAddress, string memory token, uint _amount, bool _status) external { //_status signifies (status == Status.OPENCREATOR) operation require(Init.friendlyaddress(msg.sender) ,"Not Friendly Address"); uint _usdValue = USDValue(_amount, token); freeStorage memory newStorage = freeStorage({ amount: _amount, time: now, wtoken: token, usdvalue: _usdValue }); if(_status){ users[userAddress].myDeposits.push(newStorage); users[userAddress].totalDeposit += _usdValue; users[userAddress].deposits[token] += _amount; } else { users[userAddress].myBorrows.push(newStorage); users[userAddress].totalBorrowed += _usdValue; users[userAddress].borrows[token] += _amount; } } function freePopper(address userAddress, string memory _tokenSymbol, uint _amount, bool _status) public returns (uint dues) { require(Init.friendlyaddress(msg.sender),"Not Friendly Address"); if(_status) { require(users[userAddress].deposits[_tokenSymbol]>=_amount, "Insufficient Deposits"); users[userAddress].deposits[_tokenSymbol] -= _amount; } else { require(users[userAddress].borrows[_tokenSymbol]>=_amount,"Insufficient Borrowings"); users[userAddress].borrows[_tokenSymbol] -= _amount; } uint amountLeft= _amount; freeStorage [] storage mystorage = _status ? users[userAddress].myDeposits : users[userAddress].myBorrows; for( uint i= mystorage.length-1; amountLeft >0 ; i--){ if(keccak256(abi.encodePacked(mystorage[i].wtoken)) != keccak256(abi.encodePacked(_tokenSymbol))) { continue; } if (mystorage[i].amount <= amountLeft){ amountLeft -= mystorage[i].amount; _status ? users[userAddress].totalDeposit -= mystorage[i].usdvalue : users[userAddress].totalBorrowed -= mystorage[i].usdvalue; dues+= calculateECOEarning(USDValue(mystorage[i].amount,_tokenSymbol), _tokenSymbol, mystorage[i].time); mystorage.pop(); } else { _status ? users[userAddress].totalDeposit -= (mystorage[i].amount-amountLeft)*mystorage[i].usdvalue : users[userAddress].totalBorrowed -= (mystorage[i].amount-amountLeft)*mystorage[i].usdvalue; mystorage[i].amount -= amountLeft; dues += calculateECOEarning(USDValue(amountLeft,_tokenSymbol), _tokenSymbol, mystorage[i].time); amountLeft = 0; } } _status ? users[userAddress].myDeposits = mystorage : users[userAddress].myBorrows = mystorage; } function pushOrder(address userAddress,string memory _tokenSymbol ,uint _amount,uint _duration, uint _yield, bool _status) internal returns (uint){ (uint64 _orderId,uint newAmount,uint fee) = _ordersub(_amount,userAddress,_duration,_tokenSymbol); openOrderMap[_orderId] = Order({ creator : userAddress, duration : _duration, amount : newAmount, yield : _yield, wtoken : _tokenSymbol }); if(_status) { orderStatus[_orderId] = Status.OPENCREATOR; users[userAddress].createdOrders.push(_orderId); } else { orderStatus[_orderId] = Status.OPENBORROW; users[userAddress].borrowedOrders.push(_orderId); } poolSorter(_orderId, _tokenSymbol, true); orderUSDValue[_orderId]=USDValue(_amount,_tokenSymbol); return fee; } function poolSorter(uint64 _orderId, string memory _tokenSymbol, bool _status) internal { //Status here signifies Insertion if True, and Deletion if false uint64 [] memory temp; bool task; poolindex[_tokenSymbol]=0; if(orderpool[_tokenSymbol].length==0 && _status) { orderpool[_tokenSymbol][0] = _orderId; } for((uint i, uint j)=(0,0);i<orderpool[_tokenSymbol].length;(i++,j++)) { temp[j]=orderpool[_tokenSymbol][i]; if(!task && _status && openOrderMap[temp[j]].yield > openOrderMap[_orderId].yield) { //Insertion Case temp[j]=_orderId; temp[++j]=orderpool[_tokenSymbol][i]; task = true; }else if(!task && !_status && _orderId == temp[j]){ //Deletion Case temp[j]=orderpool[_tokenSymbol][++i]; task = true; } if(orderStatus[orderpool[_tokenSymbol][i-1]]==Status.OPENBORROW && orderStatus[orderpool[_tokenSymbol][i]]==Status.OPENCREATOR) { //Assigns updatePoolIndex poolindex[_tokenSymbol] = i; break; } } orderpool[_tokenSymbol] = temp; } function matchOrder(address userAddress, string memory _tokenSymbol ,uint _amount,uint _duration,uint _yield, uint64 _orderId, bool _status) internal { matchOrderMap[_orderId] = matchedOrder({ supplier : (orderStatus[_orderId] == Status.OPENBORROW) ? userAddress : openOrderMap[_orderId].creator, borrower : (orderStatus[_orderId] == Status.OPENCREATOR) ? userAddress : openOrderMap[_orderId].creator, time : now, expiryDate : now + _duration*(30 days), duration : _duration, amount : _amount, usdvalue : USDValue(_amount,_tokenSymbol), yield : _yield, wtoken : _tokenSymbol, duesPaid : 0 }); _status ? delete users[openOrderMap[_orderId].creator].borrowedOrders[_orderId] : delete users[userAddress].createdOrders[_orderId]; delete openOrderMap[_orderId]; orderStatus[_orderId]=Status.MATCHED; orderUSDValue[_orderId]=USDValue(_amount,_tokenSymbol); users[matchOrderMap[_orderId].supplier].myOrders.push(_orderId); users[matchOrderMap[_orderId].borrower].myOrders.push(_orderId); scheduleExpiry(_orderId); scheduleCheck(_orderId,matchOrderMap[_orderId].borrower,1); EMM.mintWrappedToken(matchOrderMap[_orderId].borrower, _amount, _tokenSymbol); Init.emitOrderCreated(userAddress,_duration,_yield,_amount,_tokenSymbol); } function newOrder(address userAddress,string memory _tokenSymbol ,uint _amount,uint _duration, uint _yield, bool _status) external { require(Init.friendlyaddress(msg.sender),"Not Friendly Address"); uint amountLeft= _amount; uint index; if(_status){ index = poolindex[_tokenSymbol]-1; users[userAddress].deposits[_tokenSymbol] +=_amount; users[userAddress].totalDeposit += USDValue(_amount, _tokenSymbol); } else { index = poolindex[_tokenSymbol]; users[userAddress].borrows[_tokenSymbol] +=_amount; users[userAddress].totalBorrowed += USDValue(_amount, _tokenSymbol); } while(amountLeft>0){ if(poolindex[_tokenSymbol] == 0) { pushOrder(userAddress, _tokenSymbol, _amount, _duration, _yield, _status); break; } Order memory iOrder = openOrderMap[orderpool[_tokenSymbol][index]]; if((_status && _yield>iOrder.yield) || (!_status && _yield<iOrder.yield) || (_status)?(orderStatus[orderpool[_tokenSymbol][index]] == Status.OPENCREATOR):(orderStatus[orderpool[_tokenSymbol][index]] == Status.OPENBORROW)){ pushOrder(userAddress, _tokenSymbol, _amount, _duration, _yield, _status); break; } else { uint tduration = _duration > iOrder.duration ? _duration : iOrder.duration; uint tyield = _yield > iOrder.yield ? iOrder.yield : _yield; uint64 tID = orderpool[_tokenSymbol][index]; if(iOrder.amount>=amountLeft) { if(iOrder.amount != amountLeft) { pushOrder(iOrder.creator, _tokenSymbol, iOrder.amount-amountLeft, iOrder.duration, iOrder.yield, !_status); } matchOrder(userAddress, _tokenSymbol, amountLeft, tduration, tyield, tID, _status); amountLeft=0; } else { pushOrder(userAddress, _tokenSymbol, amountLeft- iOrder.amount, _duration, _yield, _status); matchOrder(userAddress, _tokenSymbol, amountLeft, tduration, tyield, tID , _status); amountLeft -= openOrderMap[orderpool[_tokenSymbol][index]].amount; } } } } function orderExpired (uint64 _orderId) public { require(Init.friendlyaddress(msg.sender),"Not Friendly Address"); require (matchOrderMap[_orderId].expiryDate <= now); EMM.releaseWrappedToken(matchOrderMap[_orderId].supplier,matchOrderMap[_orderId].amount, matchOrderMap[_orderId].wtoken); users[matchOrderMap[_orderId].supplier].totalDeposit -= matchOrderMap[_orderId].usdvalue; users[matchOrderMap[_orderId].borrower].totalBorrowed -= matchOrderMap[_orderId].usdvalue; orderStatus[_orderId] = Status.CLOSED; //Init.OrderExpired(_orderId,msgSender,orderMonthlyDue(_orderId,msgSender,_duration)); } function payDue(uint64 _orderId,uint _duration,address msgSender) external returns (uint due){ due = orderMonthlyDue(_orderId,_duration); uint fee = (due*Init.rewardFee())/100; EMM.DepositManager(Init.ECO(), due+fee, msgSender); Init.setOwnerFeeVault(Init.WRAP_ECO_SYMBOL(), fee); matchOrderMap[_orderId].duesPaid += 1; matchOrderMap[_orderId].duesPaid >= uint((now - matchOrderMap[_orderId].time)/30 days) ? Init.setUserLocked(msgSender,false) : Init.setUserLocked(msgSender,true); Init.emitDuePaid(_orderId,msgSender,orderMonthlyDue(_orderId,_duration)); } function dueCheck(uint64 _orderId,address borrower,uint month) external returns(uint) { require (Init.friendlyaddress(msg.sender) && now >= matchOrderMap[_orderId].time + matchOrderMap[_orderId].duesPaid * 30 days); uint due = orderMonthlyDue(_orderId,1); EMM.mintECO(matchOrderMap[_orderId].supplier,due*(100-Init.rewardFee())/100); if(matchOrderMap[_orderId].duesPaid < month && !Init.isRegistrar(borrower) && !Init.isUserLocked(borrower)){ Init.setUserLocked(borrower,true); orderExpired(_orderId); } else { Init.emitDuePaid(_orderId,borrower,orderMonthlyDue(_orderId,month+1)); scheduleCheck(_orderId,borrower,month+1); } } function scheduleExpiry(uint64 _orderId) internal{ uint time = matchOrderMap[_orderId].expiryDate - matchOrderMap[_orderId].time; bytes memory data = abi.encodeWithSelector(bytes4(keccak256('orderExpired(uint256)')),_orderId); uint callCost = 300000*1e9 + abacus.callFee(); abacus.scheduleFunc{value:callCost}(address(this), time ,data , abacus.callFee() ,300000 , 1e9 ); } function scheduleCheck(uint _orderId,address borrower,uint month) internal{ bytes memory data = abi.encodeWithSelector(bytes4(keccak256('dueCheck(uint256,address,uint256)')),_orderId,borrower,month); uint callCost = 300000*1e9 + abacus.callFee(); abacus.scheduleFunc{value:callCost}(address(this), 30 days ,data , abacus.callFee() ,300000 , 1e9 ); } function cancelOrder(uint64 _orderId) external{ require(Init.friendlyaddress(msg.sender)); if(orderStatus[_orderId]==Status.OPENCREATOR) { EMM.releaseWrappedToken(openOrderMap[_orderId].creator,openOrderMap[_orderId].amount, openOrderMap[_orderId].wtoken); users[openOrderMap[_orderId].creator].deposits[openOrderMap[_orderId].wtoken] -=openOrderMap[_orderId].amount; users[openOrderMap[_orderId].creator].totalDeposit -= orderUSDValue[_orderId]; for((uint i,uint j)=(0,0); i<users[openOrderMap[_orderId].creator].createdOrders.length; (i++,j++)) { if(users[openOrderMap[_orderId].creator].createdOrders[i] == _orderId) { --j; continue; } users[openOrderMap[_orderId].creator].createdOrders[j] = users[openOrderMap[_orderId].creator].createdOrders[i]; } } else if(orderStatus[_orderId]==Status.OPENBORROW){ users[openOrderMap[_orderId].creator].borrows[openOrderMap[_orderId].wtoken] -=openOrderMap[_orderId].amount; users[openOrderMap[_orderId].creator].totalBorrowed -= orderUSDValue[_orderId]; for((uint i,uint j)=(0,0); i<users[openOrderMap[_orderId].creator].borrowedOrders.length; (i++,j++)) { if(users[openOrderMap[_orderId].creator].borrowedOrders[i] == _orderId) { continue; } users[openOrderMap[_orderId].creator].borrowedOrders[j] = users[openOrderMap[_orderId].creator].borrowedOrders[i]; } } poolSorter(_orderId, openOrderMap[_orderId].wtoken,false); delete openOrderMap[_orderId]; delete orderUSDValue[_orderId]; orderStatus[_orderId] = Status.CLOSED; } /*==============Helpers============ ---------------------------------*/ function USDValue(uint amount, string memory _token) public view returns (uint usdvalue) { usdvalue = amount*fetchTokenPrice(_token)/(10**8)/(10**uint(wERC20(EMM.getwTokenAddress(_token)).decimals())); } function orderMonthlyDue(uint64 _orderId, uint _duration) public view returns(uint due){ orderStatus[_orderId] == Status.MATCHED ? due = USDValue (matchOrderMap[_orderId].amount, matchOrderMap[_orderId].wtoken) * matchOrderMap[_orderId].yield * _duration*30 days*fetchTokenPrice(Init.WRAP_ECO_SYMBOL())/3153600000/(10**8) : due = 0; } function fetchTokenPrice(string memory _tokenSymbol) public view returns(uint){ //Put any Token Wrapped or Direct uint response = uint(abacus.getJobResponse(EMM.getFetchId(_tokenSymbol))[0]); return response > 0 ? response : 0; } /*function issueReward(address userAddress, string memory _tokenSymbol, uint time, uint tokenUsdValue) internal { uint reward = calculateECOEarning(tokenUsdValue, _tokenSymbol, time); EMM.mintECO(userAddress, reward); }*/ function calculateECOEarning(uint usdvalue, string memory _tokenSymbol, uint time) private view returns (uint){ uint _amount = usdvalue*(10**16)/fetchTokenPrice(Init.WRAP_ECO_SYMBOL()); uint reward = (_amount * Init.slabRateDeposit(_tokenSymbol) * (now - time))/3153600000; //decimal from Abacus is setoff by decimal from Eco return reward; } function getECOEarnings(address userAddress) public view returns (uint){ uint ecobalance; for(uint i=0; i<users[userAddress].myDeposits.length; i++) { ecobalance += calculateECOEarning(users[userAddress].myDeposits[i].usdvalue, users[userAddress].myDeposits[i].wtoken, users[userAddress].myDeposits[i].time); } for(uint i=0; i<users[userAddress].myBorrows.length; i++) { ecobalance -= calculateECOEarning(users[userAddress].myBorrows[i].usdvalue, users[userAddress].myBorrows[i].wtoken, users[userAddress].myBorrows[i].time); } return ecobalance - EMM.ecoWithdrawls(userAddress); } function _ordersub(uint amount,address userAddress,uint _duration,string memory _tokenSymbol) internal view returns (uint64, uint, uint){ uint newAmount = amount - (amount*Init.tradeFee())/100; uint fee = (amount*Init.tradeFee())/100; uint64 _orderId = uint64(uint(keccak256(abi.encodePacked(userAddress,_tokenSymbol,_duration,now)))); return (_orderId,newAmount,fee); } function getUserDepositsbyToken(address userAddress, string memory wtoken) public view returns(uint) { return users[userAddress].deposits[wtoken]; } function getUserBorrowedOrderbyToken(address userAddress, string memory wtoken) public view returns(uint) { return users[userAddress].borrows[wtoken]; } function getUserBorrowed(address userAddress) public view returns(uint) { return users[userAddress].totalBorrowed; } function getUserBorrowedOrder(address userAddress) public view returns (uint64 [] memory) { return users[userAddress].borrowedOrders; } function getUserDepositOrder(address userAddress) public view returns (uint64 [] memory) { return users[userAddress].createdOrders; } function getUserMatchOrder(address userAddress) public view returns (uint64 [] memory) { return users[userAddress].myOrders; } function getbuyPower(address userAddress) public view returns (uint){ if(!Init.isRegistrar(userAddress)) { return (10**30); } if(Init.isUserLocked(userAddress)) { return 0; } uint buyPower; buyPower += users[userAddress].totalDeposit - ((users[userAddress].totalDeposit*Init.CDSpercent())/100); buyPower -= users[userAddress].totalBorrowed; return buyPower; } function getOrderIds(string memory wtoken) public view returns (uint64 [] memory orderIds) { return orderpool[wtoken]; } } contract Ecocelium is Initializable{ address public owner; address payable EMMAddress; IAbacusOracle abacus; EcoMoneyManager EMM; EcoceliumDataManager EDM; EcoceliumInit Init; function initialize(address _owner,address payable EMMaddress,address payable AbacusAddress,address EDMaddress, address payable Initaddress)public payable initializer { owner = _owner; EMM = EcoMoneyManager(EMMaddress); EMMAddress = EMMaddress; abacus = IAbacusOracle(AbacusAddress);//0x323f81D9F57d2c3d5555b14d90651aCDc03F9d52 EDM = EcoceliumDataManager(EDMaddress); Init = EcoceliumInit(Initaddress); } function changeOwner(address _owner) public{ require(msg.sender==owner); owner = _owner; } func pdateContracts() public{ require(msg.sender==owner); EMM = EcoMoneyManager(Init.MONEYMANAGER()); abacus = IAbacusOracle(Init.ABACUS()); EDM = EcoceliumDataManager(Init.DATAMANAGER()); } /*===========Main functions============ -------------------------------------*/ function Deposit(string memory rtoken, uint _amount) external payable { address _msgSender = msg.sender; string memory wtoken = EMM.getWrapped(rtoken); _deposit(rtoken, _amount, _msgSender, wtoken); EDM.freePusher(_msgSender, wtoken, _amount, true); EMM.mintWrappedToken(_msgSender, _amount, wtoken); EMM.lockWrappedToken(_msgSender, _amount,wtoken); } function _deposit(string memory rtoken,uint _amount, address msgSender, string memory wtoken) internal { require(EMM.getwTokenAddress(wtoken) != address(0),"not supported"); if(keccak256(abi.encodePacked(rtoken)) == keccak256(abi.encodePacked(Init.ETH_SYMBOL()))) { require(msg.value >= _amount); EMM.DepositManager{value:msg.value}(rtoken, _amount, msgSender); }else { EMM.DepositManager(rtoken, _amount, msgSender); } Init.emitSwap(msgSender,rtoken,wtoken,_amount); } function depositAndOrder(address userAddress,string memory rtoken ,uint _amount,uint _duration,uint _yield) external payable { require(msg.sender == userAddress); string memory wtoken = EMM.getWrapped(rtoken); _deposit(rtoken, _amount, userAddress, wtoken); EMM.mintWrappedToken(userAddress, _amount, wtoken); EMM.lockWrappedToken(userAddress, _amount,wtoken); EDM.newOrder(userAddress, EMM.getWrapped(rtoken), _amount, _duration, _yield, true); } function createOrder(address userAddress,string memory _tokenSymbol ,uint _amount,uint _duration,uint _yield) external payable { require(msg.sender == userAddress); string memory wtoken = EMM.getWrapped(_tokenSymbol); require(EDM.getUserDepositsbyToken(userAddress, wtoken) >= _amount, "Insufficient Balance"); uint ecoEarnings = EDM.freePopper(userAddress, wtoken , _amount, true); if(ecoEarnings > EMM.ecoWithdrawls(userAddress)) { ecoEarnings-=EMM.ecoWithdrawls(userAddress); EMM.adjustEcoEarning(userAddress, EMM.ecoWithdrawls(userAddress)); EMM.mintECO(userAddress, ecoEarnings); } else { EMM.adjustEcoEarning(userAddress, ecoEarnings); } EDM.newOrder(userAddress, wtoken, _amount, _duration, _yield, true); } function getAggEcoBalance(address userAddress) public view returns(uint) { return wERC20(EMM.getwTokenAddress(Init.WRAP_ECO_SYMBOL())).balanceOf(userAddress) + EDM.getECOEarnings(userAddress); } function borrowOrder(address userAddress, string memory rtoken, uint amount, uint duration, uint yield) public {//Rewrite this part require(isWithdrawEligible(userAddress, rtoken, amount)); EDM.newOrder(msg.sender,rtoken, amount,duration,yield,false); } function payDueOrder(uint64 _orderId,uint _duration) external { EDM.payDue(_orderId,_duration,msg.sender); } function clearBorrow(string memory rtoken, uint _amount) external payable{ address msgSender = msg.sender; string memory wtoken = EMM.getWrapped(rtoken); uint dues = EDM.freePopper(msgSender, wtoken, _amount, false); EMM.DepositManager(Init.ECO(), dues, msgSender); if(keccak256(abi.encodePacked(rtoken)) == keccak256(abi.encodePacked(Init.ETH_SYMBOL()))) { require(msg.value == _amount); EMM.DepositManager{value:_amount}(rtoken, _amount, msgSender); }else { EMM.DepositManager(rtoken, _amount, msgSender); } } function Borrow(uint _amount, string memory _tokenSymbol) public { require(isWithdrawEligible(msg.sender, _tokenSymbol, _amount)); EDM.freePusher(msg.sender, EMM.getWrapped(_tokenSymbol), _amount,false); EMM.WithdrawManager(_tokenSymbol, _amount, msg.sender); } function SwapWrapToWrap(string memory token1,string memory token2, uint token1amount) external returns(uint) { address msgSender = msg.sender; uint token2price = fetchTokenPrice(token2); uint token2amount = EDM.USDValue(token1amount,token1)*(100-Init.swapFee())*(10**uint(wERC20(EMM.getwTokenAddress(token2)).decimals()))*(10**8)/token2price/100; EMM.w2wswap(msgSender, token1, token1amount, token2amount, token2); uint ecoEarnings = EDM.freePopper(msgSender,token1,token1amount,true); EMM.mintECO(msgSender, ecoEarnings); Init.setOwnerFeeVault(token1, token1amount*Init.swapFee()/100); EDM.freePusher(msgSender, token2,token2amount,true); Init.emitSwap(msgSender,token1,token2,token2amount); return token2amount; } function cancelOrder(uint64 _orderId) public{ (address creator,,,,) = EDM.openOrderMap(_orderId); require(msg.sender==creator); EDM.cancelOrder(_orderId); } receive() external payable { } /*==============Helpers============ ---------------------------------*/ function orderMonthlyDue(uint64 _orderId,uint _duration) public view returns(uint){ return EDM.orderMonthlyDue(_orderId,_duration); } function updateFees(uint _swapFee,uint _tradeFee,uint _rewardFee) public{ require(msg.sender == owner); Init.updateFees(_swapFee,_tradeFee,_rewardFee); } function getOrderIds(string memory wtoken) public view returns(uint64 [] memory){ return EDM.getOrderIds(wtoken); } function fetchTokenPrice(string memory _tokenSymbol) public view returns(uint){ return EDM.fetchTokenPrice(_tokenSymbol); } function Withdraw(string memory to, uint _amount) external { address payable msgSender = msg.sender; string memory from = EMM.getWrapped(to); require(!Init.isUserLocked(msgSender), "Your Address is Locked Pay Dues"); if(EDM.getUserBorrowed(msgSender) >0 ) { require(isWithdrawEligible(msgSender, to, _amount) , "Not Eligible for Withdraw"); } wERC20 wToken = wERC20(EMM.getwTokenAddress(to)); uint amountLeft; uint availableBalance = wToken.balanceOf(msgSender) - EDM.getUserDepositsbyToken(msgSender, from) - EDM.getUserBorrowedOrderbyToken(msgSender, from); if(availableBalance >= _amount) { EMM.burnWrappedFrom(msgSender, _amount, from); EMM.WithdrawManager(to, _amount, msgSender); } else { if(keccak256(abi.encodePacked(to)) == keccak256(abi.encodePacked(Init.ECO()))) { require( wToken.balanceOf(msgSender) + EDM.getECOEarnings(msgSender) >= _amount,"Insufficient Balance"); if(wToken.balanceOf(msgSender) >=_amount) { _withdraw(msgSender, from, _amount, to); } else { amountLeft = _amount - wToken.balanceOf(msgSender); if(wToken.balanceOf(msgSender) > 0){ _withdraw(msgSender, from, wToken.balanceOf(msgSender), to); } EMM.redeemEcoEarning(msgSender,amountLeft); } } else { require(wToken.balanceOf(msgSender)>=_amount,"Insufficient balance"); _withdraw(msgSender, from, _amount, to); } } Init.emitSwap(msgSender,from,to,_amount); } function _withdraw(address payable msgSender, string memory from, uint amount, string memory to) internal { EMM.releaseWrappedToken(msgSender,amount, from); EMM.burnWrappedFrom(msgSender, amount, from); Init.setOwnerFeeVault(to,(amount*Init.rewardFee())/100); uint ecoEarnings = EDM.freePopper(msgSender,from,amount, true); if(ecoEarnings>0) { if(ecoEarnings > EMM.ecoWithdrawls(msgSender)) { ecoEarnings-=EMM.ecoWithdrawls(msgSender); if(EMM.ecoWithdrawls(msgSender) > 0) { EMM.adjustEcoEarning(msgSender, EMM.ecoWithdrawls(msgSender)); } EMM.mintECO(msgSender, ecoEarnings); } else { EMM.adjustEcoEarning(msgSender, ecoEarnings); } } uint newAmount = amount - (amount*Init.rewardFee())/100; EMM.WithdrawManager(to,newAmount, msgSender); } function isWithdrawEligible(address userAddress, string memory to, uint amount) public view returns (bool Eligible){ return (EDM.getbuyPower(userAddress) > EDM.USDValue(amount,EMM.getWrapped(to))); } } contract EcoceliumInit is Initializable { address payable owner; address payable public MONEYMANAGER; address payable public DATAMANAGER; address payable public ECOCELIUM; address payable public ABACUS; string public WRAP_ECO_SYMBOL; string public ECO; string public ETH_SYMBOL; string public WRAP_ETH_SYMBOL; uint public swapFee; uint public rewardFee; uint public tradeFee; uint public CDSpercent; string [] rtokenlist; string [] wtokenlist; mapping (string => uint) public rcurrencyID; mapping (string => uint) public wcurrencyID; mapping (address => bool) public isRegistrar; mapping (address => bool) public isUserLocked; mapping (string => uint ) public ownerFeeVault; mapping (string => uint) public slabRateDeposit; mapping (address => bool) public friendlyaddress; mapping (address => address) public SponsorAddress; mapping (address => uint) public usertreasuryearnings; event OrderCreated( address userAddress, uint duration, uint yield, uint amount, string token ); event Swap( address userAddress, string from, string to, uint amount ); event Borrowed( uint64 orderId, address borrower, uint amount, uint duration ); event Deposit( address userAddress, string token, uint tokenAmount, uint collateralValue ); event DuePaid( uint64 orderId, address borrower, uint amount ); event WrapTokenCreated( address TokenAddress, string TokenName, string TokenSymbol, uint Decimals ); receive() payable external { } function initializeAddress(address payable _owner) public initializer { friendlyaddress[_owner] = true; owner = _owner; } function addRealCurrency(string memory rtoken) public{ require(friendlyaddress[msg.sender],"Not Friendly Address"); if(rcurrencyID[rtoken] == 0) { rtokenlist.push(rtoken); rcurrencyID[rtoken] = rtokenlist.length; } } function addWrapCurrency (string memory wtoken) public{ require(friendlyaddress[msg.sender],"Not Friendly Address"); if(wcurrencyID[wtoken] == 0) { wtokenlist.push(wtoken); wcurrencyID[wtoken] = wtokenlist.length; } } function setSlabRate(string memory WToken, uint rate) public { require(friendlyaddress[msg.sender],"Not Friendly Address"); slabRateDeposit[WToken] = rate; } function setUserLocked(address userAddress, bool value) public { require(friendlyaddress[msg.sender],"Not Friendly Address"); isUserLocked[userAddress] = value; } function setFriendlyAddress(address Address) public { (msg.sender == owner,"not owner"); friendlyaddress[Address] = true; } function addRegistrar(address _registrar) public{ require(friendlyaddress[msg.sender],"Not Friendly Address"); isRegistrar[_registrar] = true; } function setOwnerFeeVault(string memory add,uint value) public { require(friendlyaddress[msg.sender],"Not Friendly Address"); ownerFeeVault[add] += value; } function emitOrderCreated(address userAddress, uint _duration, uint _yield, uint newAmount,string memory _tokenSymbol) public { require(friendlyaddress[msg.sender],"Not Friendly Address"); emit OrderCreated(userAddress,_duration,_yield,newAmount,_tokenSymbol); } function emitSwap(address msgSender, string memory from, string memory to,uint _amount) public { require(friendlyaddress[msg.sender],"Not Friendly Address"); emit Swap(msgSender,from,to,_amount); } function emitBorrowed(uint64 _orderId, address msgSender, uint _amount,uint _duration) public { require(friendlyaddress[msg.sender],"Not Friendly Address"); emit Borrowed(_orderId,msgSender,_amount,_duration); } function emitWrappedCreated(address tokenAddress,string memory name, string memory symbol,uint8 decimals) public { require(friendlyaddress[msg.sender],"Not Friendly Address"); emit WrapTokenCreated(tokenAddress,name,symbol,decimals); } function emitDeposit(address msgSender, string memory _tokenSymbol, uint amount, uint tokenUsdValue) public { require(friendlyaddress[msg.sender],"Not Friendly Address"); emit Deposit(msgSender,_tokenSymbol,amount,tokenUsdValue); } function emitDuePaid(uint64 _orderId, address msgSender, uint due) public { require(friendlyaddress[msg.sender],"Not Friendly Address"); emit DuePaid(_orderId,msgSender,due); } function setCONSTSYMBOLS(string[4] memory _symbolCONST) public { require(friendlyaddress[msg.sender],"Not Friendly Address"); WRAP_ECO_SYMBOL = _symbolCONST[0]; ECO = _symbolCONST[1]; ETH_SYMBOL = _symbolCONST[2]; WRAP_ETH_SYMBOL = _symbolCONST[3]; } function updateFees(uint _swapFee,uint _tradeFee,uint _rewardFee) public{ require(friendlyaddress[msg.sender],"Not Friendly Address"); (swapFee,tradeFee,rewardFee) = (_swapFee,_tradeFee,_rewardFee); } function setCSDpercent(uint percent) public { require(friendlyaddress[msg.sender],"Not Friendly Address"); CDSpercent = percent; } function changeAbacusaddress(address payable Abacusaddress) public{ require(msg.sender == owner,"not owner"); ABACUS = Abacusaddress; } function changeEcoceliumaddress(address payable Ecocelium) public{ require(msg.sender == owner,"not owner"); ECOCELIUM = Ecocelium; } function changeDMaddress(address payable DMAddress) public{ require(msg.sender == owner,"not owner"); DATAMANAGER = DMAddress; } function changeMMaddress(address payable MMaddress) public{ require(msg.sender == owner,"not owner"); MONEYMANAGER = MMaddress; } function changeOwner(address payable _owner) public{ require(msg.sender==owner); owner = _owner; } function setSponsor(address userAddress, address _sponsorAddress) external { require(friendlyaddress[msg.sender],"Not Friendly Address"); SponsorAddress[userAddress] = _sponsorAddress; } function updateTreasuryEarnings(address userAddress, uint _amount) public { require(friendlyaddress[msg.sender],"Not Friendly Address"); usertreasuryearnings[userAddress] = _amount; } } contract EcoMoneyManager is Initializable { EcoceliumInit Init; address public owner; address [] public TokenAddresses; address [] public wTokenAddresses; mapping (string => address) rTokens; mapping (string => string) rTokensTowToken; mapping (string => TokenConfig) wTokens; mapping (address => uint) public ecoWithdrawls; mapping (string => uint) public WGains; mapping (string => uint) public WLoss; receive() payable external { } struct TokenConfig{ address tokenAddress; uint64 fetchId; } function initialize(address _owner, address payable _Init) public initializer{ owner = _owner; Init = EcoceliumInit(_Init); } function updateAdminAddress(address adminAddress) public { require(msg.sender == owner); for(uint i = 0;i<wTokenAddresses.length;i++){ wERC20(wTokenAddresses[i]).changeAdmin(adminAddress); } } function addTokenWithAddress(address tokenAddress) public { require(msg.sender == owner); ERC20Basic token = ERC20Basic(tokenAddress); require(getrTokenAddress(token.symbol())== address(0),"token exist"); rTokens[token.symbol()] = tokenAddress; TokenAddresses.push(tokenAddress); } function createWrapToken(string memory name,string memory symbol,uint64 _fetchId, uint8 decimal, string memory wrapOf) public returns(address TokenAddress){ require(msg.sender == owner); wERC20 token = new wERC20(name,symbol,decimal, address(this), address(this)); rTokensTowToken[wrapOf] = symbol; TokenAddresses.push(address(token)); wTokenAddresses.push(address(token)); wTokens[symbol] = TokenConfig({ tokenAddress:address(token), fetchId : _fetchId }); Init.emitWrappedCreated(address(token),name,symbol,token.decimals()); return address(token); } function changeOwner(address _owner) public{ require(owner == msg.sender); owner =_owner; } function getwTokenAddress(string memory symbol) public view returns(address){ return wTokens[symbol].tokenAddress; } function getFetchId(string memory symbol ) public view returns(uint64){ if( wTokens[symbol].tokenAddress == address(0)) { symbol = rTokensTowToken[symbol]; } return wTokens[symbol].fetchId; } function getrTokenAddress(string memory symbol) public view returns(address){ return rTokens[symbol]; } function getTokenAddresses() public view returns(address[] memory){ return TokenAddresses; } function getWrapped(string memory symbol) public view returns(string memory){ return rTokensTowToken[symbol]; } function getTokenID(string memory symbol) public view returns(uint){ for(uint i=0; i< TokenAddresses.length; i++) { if(TokenAddresses[i] == wTokens[symbol].tokenAddress) { return i; } } } function releaseWrappedToken (address _userAddress, uint amount, string memory WToken) public { require(Init.friendlyaddress(msg.sender),"Not Friendly Address"); wERC20(getwTokenAddress(WToken)).release(_userAddress,amount); } function mintWrappedToken (address _userAddress, uint amount, string memory WToken) public { require(Init.friendlyaddress(msg.sender),"Not Friendly Address"); wERC20(getwTokenAddress(WToken)).mint(_userAddress,amount); } function lockWrappedToken (address _userAddress, uint amount, string memory WToken) public { require(Init.friendlyaddress(msg.sender),"Not Friendly Address"); wERC20(getwTokenAddress(WToken)).lock(_userAddress,amount); } function burnWrappedFrom(address userAddress, uint amount, string memory WToken) public { require(Init.friendlyaddress(msg.sender),"Not Friendly Address"); wERC20(getwTokenAddress(WToken)).burnFrom(userAddress,amount); } function mintECO(address userAddress, uint amount) public { require(Init.friendlyaddress(msg.sender),"Not Friendly Address"); wERC20(getwTokenAddress(Init.WRAP_ECO_SYMBOL())).mint(userAddress,amount); } function lockECO(address userAddress, uint amount) public { require(Init.friendlyaddress(msg.sender),"Not Friendly Address"); wERC20(getwTokenAddress(Init.WRAP_ECO_SYMBOL())).lock(userAddress,amount); } function releaseECO(address userAddress, uint amount) public { require(Init.friendlyaddress(msg.sender),"Not Friendly Address"); wERC20(getwTokenAddress(Init.WRAP_ECO_SYMBOL())).release(userAddress,amount); } function burnECOFrom(address userAddress, uint amount) public { require(Init.friendlyaddress(msg.sender),"Not Friendly Address"); wERC20(getwTokenAddress(Init.WRAP_ECO_SYMBOL())).burnFrom(userAddress,amount); } function DepositManager(string memory _rtoken, uint amount, address userAddress) public payable { require(Init.friendlyaddress(msg.sender),"Not Friendly Address"); if(Init.rcurrencyID(_rtoken) == Init.rcurrencyID(Init.ETH_SYMBOL())) { require(msg.value >= amount,"Invalid Amount"); } else {ERC20Basic rtoken = ERC20Basic(getrTokenAddress(_rtoken)); require(rtoken.allowance(userAddress, address(this)) >= amount,"set allowance"); rtoken.transferFrom(userAddress,address(this),amount);} } function WithdrawManager(string memory _rtoken, uint amount, address payable userAddress) public { require(Init.friendlyaddress(msg.sender),"Not Friendly Address"); if(Init.rcurrencyID(_rtoken) == Init.rcurrencyID(Init.ETH_SYMBOL())) { userAddress.transfer(amount); } else { ERC20Basic rtoken = ERC20Basic(getrTokenAddress(_rtoken)); rtoken.approve(userAddress, amount); rtoken.transferFrom(address(this),userAddress,amount);} } function redeemEcoEarning(address payable userAddress, uint amount) public { require(Init.friendlyaddress(msg.sender),"Not Friendly Address"); ecoWithdrawls[userAddress] = ecoWithdrawls[userAddress] + amount; WithdrawManager(Init.ECO(), amount, userAddress); } function adjustEcoEarning(address userAddress, uint amount) public { require(Init.friendlyaddress(msg.sender),"Not Friendly Address"); ecoWithdrawls[userAddress] = ecoWithdrawls[userAddress] - amount; } function updateFetchID (string memory wtoken, uint64 _fetchID) external { require(owner == msg.sender); wTokens[wtoken].fetchId = _fetchID; } function w2wswap (address msgSender, string memory token1, uint token1amount, uint token2amount, string memory token2) external { require(Init.friendlyaddress(msg.sender),"Not Friendly Address"); releaseWrappedToken(msgSender, token1amount, token1); burnWrappedFrom(msgSender,token1amount,token1); WGains[token1]=token1amount; mintWrappedToken(msgSender,token2amount, token2); lockWrappedToken(msgSender, token2amount, token2); WLoss[token2]=token2amount; } }

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{"success": true, "error": null, "results": {"detectors": [{"check": "divide-before-multiply", "impact": "Medium", "confidence": "Medium"}, {"check": "reentrancy-no-eth", "impact": "Medium", "confidence": "Medium"}, {"check": "erc20-interface", "impact": "Medium", "confidence": "High"}, {"check": "arbitrary-send", "impact": "High", "confidence": "Medium"}, {"check": "incorrect-equality", "impact": "Medium", "confidence": "High"}, {"check": "uninitialized-local", "impact": "Medium", "confidence": "Medium"}, {"check": "reentrancy-eth", "impact": "High", "confidence": "Medium"}, {"check": "unused-return", "impact": "Medium", "confidence": "Medium"}, {"check": "locked-ether", "impact": "Medium", "confidence": "High"}]}}

0x7d5121505149065b562c789a0145ed750e6e8cdd

pragma solidity 0.6.8; library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // This method relies in extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. uint256 size; // solhint-disable-next-line no-inline-assembly assembly { size := extcodesize(account) } return size > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain`call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return _functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); return _functionCallWithValue(target, data, value, errorMessage); } function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) { require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: weiValue }(data); if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } library Arrays { /** * @dev Searches a sorted `array` and returns the first index that contains * a value greater or equal to `element`. If no such index exists (i.e. all * values in the array are strictly less than `element`), the array length is * returned. Time complexity O(log n). * * `array` is expected to be sorted in ascending order, and to contain no * repeated elements. */ function findUpperBound(uint256[] storage array, uint256 element) internal view returns (uint256) { if (array.length == 0) { return 0; } uint256 low = 0; uint256 high = array.length; while (low < high) { uint256 mid = Math.average(low, high); // Note that mid will always be strictly less than high (i.e. it will be a valid array index) // because Math.average rounds down (it does integer division with truncation). if (array[mid] > element) { high = mid; } else { low = mid + 1; } } // At this point `low` is the exclusive upper bound. We will return the inclusive upper bound. if (low > 0 && array[low - 1] == element) { return low - 1; } else { return low; } } } abstract contract Context { function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } library Counters { using SafeMath for uint256; struct Counter { // This variable should never be directly accessed by users of the library: interactions must be restricted to // the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add // this feature: see https://github.com/ethereum/solidity/issues/4637 uint256 _value; // default: 0 } function current(Counter storage counter) internal view returns (uint256) { return counter._value; } function increment(Counter storage counter) internal { // The {SafeMath} overflow check can be skipped here, see the comment at the top counter._value += 1; } function decrement(Counter storage counter) internal { counter._value = counter._value.sub(1); } } interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } library Math { /** * @dev Returns the largest of two numbers. */ function max(uint256 a, uint256 b) internal pure returns (uint256) { return a >= b ? a : b; } /** * @dev Returns the smallest of two numbers. */ function min(uint256 a, uint256 b) internal pure returns (uint256) { return a < b ? a : b; } /** * @dev Returns the average of two numbers. The result is rounded towards * zero. */ function average(uint256 a, uint256 b) internal pure returns (uint256) { // (a + b) / 2 can overflow, so we distribute return (a / 2) + (b / 2) + ((a % 2 + b % 2) / 2); } } contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor () internal { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), msgSender); } /** * @dev Returns the address of the current owner. */ function owner() public view returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(_owner == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { emit OwnershipTransferred(_owner, address(0)); _owner = address(0); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } } contract Pausable is Context { /** * @dev Emitted when the pause is triggered by `account`. */ event Paused(address account); /** * @dev Emitted when the pause is lifted by `account`. */ event Unpaused(address account); bool private _paused; /** * @dev Initializes the contract in unpaused state. */ constructor () internal { _paused = false; } /** * @dev Returns true if the contract is paused, and false otherwise. */ function paused() public view returns (bool) { return _paused; } /** * @dev Modifier to make a function callable only when the contract is not paused. * * Requirements: * * - The contract must not be paused. */ modifier whenNotPaused() { require(!_paused, "Pausable: paused"); _; } /** * @dev Modifier to make a function callable only when the contract is paused. * * Requirements: * * - The contract must be paused. */ modifier whenPaused() { require(_paused, "Pausable: not paused"); _; } /** * @dev Triggers stopped state. * * Requirements: * * - The contract must not be paused. */ function _pause() internal virtual whenNotPaused { _paused = true; emit Paused(_msgSender()); } /** * @dev Returns to normal state. * * Requirements: * * - The contract must be paused. */ function _unpause() internal virtual whenPaused { _paused = false; emit Unpaused(_msgSender()); } } library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } contract ERC20 is Context, IERC20 { using SafeMath for uint256; using Address for address; mapping (address => uint256) private _balances; mapping (address => mapping (address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; uint8 private _decimals; /** * @dev Sets the values for {name} and {symbol}, initializes {decimals} with * a default value of 18. * * To select a different value for {decimals}, use {_setupDecimals}. * * All three of these values are immutable: they can only be set once during * construction. */ constructor (string memory name, string memory symbol) public { _name = name; _symbol = symbol; _decimals = 18; } /** * @dev Returns the name of the token. */ function name() public view returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5,05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is * called. * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view returns (uint8) { return _decimals; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `recipient` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address recipient, uint256 amount) public virtual override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { _approve(_msgSender(), spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}; * * Requirements: * - `sender` and `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. * - the caller must have allowance for ``sender``'s tokens of at least * `amount`. */ function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) { _transfer(sender, recipient, amount); _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance")); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue)); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero")); return true; } /** * @dev Moves tokens `amount` from `sender` to `recipient`. * * This is internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `sender` cannot be the zero address. * - `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. */ function _transfer(address sender, address recipient, uint256 amount) internal virtual { require(sender != address(0), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(sender, recipient, amount); _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance"); _balances[recipient] = _balances[recipient].add(amount); emit Transfer(sender, recipient, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements * * - `to` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply = _totalSupply.add(amount); _balances[account] = _balances[account].add(amount); emit Transfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance"); _totalSupply = _totalSupply.sub(amount); emit Transfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens. * * This internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve(address owner, address spender, uint256 amount) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Sets {decimals} to a value other than the default one of 18. * * WARNING: This function should only be called from the constructor. Most * applications that interact with token contracts will not expect * {decimals} to ever change, and may work incorrectly if it does. */ function _setupDecimals(uint8 decimals_) internal { _decimals = decimals_; } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be to transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { } } abstract contract ERC20Burnable is Context, ERC20 { /** * @dev Destroys `amount` tokens from the caller. * * See {ERC20-_burn}. */ function burn(uint256 amount) public virtual { _burn(_msgSender(), amount); } /** * @dev Destroys `amount` tokens from `account`, deducting from the caller's * allowance. * * See {ERC20-_burn} and {ERC20-allowance}. * * Requirements: * * - the caller must have allowance for ``accounts``'s tokens of at least * `amount`. */ function burnFrom(address account, uint256 amount) public virtual { uint256 decreasedAllowance = allowance(account, _msgSender()).sub(amount, "ERC20: burn amount exceeds allowance"); _approve(account, _msgSender(), decreasedAllowance); _burn(account, amount); } } abstract contract ERC20Pausable is ERC20, Pausable { /** * @dev See {ERC20-_beforeTokenTransfer}. * * Requirements: * * - the contract must not be paused. */ function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual override { super._beforeTokenTransfer(from, to, amount); require(!paused(), "ERC20Pausable: token transfer while paused"); } } abstract contract ERC20Snapshot is ERC20 { // Inspired by Jordi Baylina's MiniMeToken to record historical balances: // https://github.com/Giveth/minimd/blob/ea04d950eea153a04c51fa510b068b9dded390cb/contracts/MiniMeToken.sol using SafeMath for uint256; using Arrays for uint256[]; using Counters for Counters.Counter; // Snapshotted values have arrays of ids and the value corresponding to that id. These could be an array of a // Snapshot struct, but that would impede usage of functions that work on an array. struct Snapshots { uint256[] ids; uint256[] values; } mapping (address => Snapshots) private _accountBalanceSnapshots; Snapshots private _totalSupplySnapshots; // Snapshot ids increase monotonically, with the first value being 1. An id of 0 is invalid. Counters.Counter private _currentSnapshotId; /** * @dev Emitted by {_snapshot} when a snapshot identified by `id` is created. */ event Snapshot(uint256 id); /** * @dev Creates a new snapshot and returns its snapshot id. * * Emits a {Snapshot} event that contains the same id. * * {_snapshot} is `internal` and you have to decide how to expose it externally. Its usage may be restricted to a * set of accounts, for example using {AccessControl}, or it may be open to the public. * * [WARNING] * ==== * While an open way of calling {_snapshot} is required for certain trust minimization mechanisms such as forking, * you must consider that it can potentially be used by attackers in two ways. * * First, it can be used to increase the cost of retrieval of values from snapshots, although it will grow * logarithmically thus rendering this attack ineffective in the long term. Second, it can be used to target * specific accounts and increase the cost of ERC20 transfers for them, in the ways specified in the Gas Costs * section above. * * We haven't measured the actual numbers; if this is something you're interested in please reach out to us. * ==== */ function _snapshot() internal virtual returns (uint256) { _currentSnapshotId.increment(); uint256 currentId = _currentSnapshotId.current(); emit Snapshot(currentId); return currentId; } /** * @dev Retrieves the balance of `account` at the time `snapshotId` was created. */ function balanceOfAt(address account, uint256 snapshotId) public view returns (uint256) { (bool snapshotted, uint256 value) = _valueAt(snapshotId, _accountBalanceSnapshots[account]); return snapshotted ? value : balanceOf(account); } /** * @dev Retrieves the total supply at the time `snapshotId` was created. */ function totalSupplyAt(uint256 snapshotId) public view returns(uint256) { (bool snapshotted, uint256 value) = _valueAt(snapshotId, _totalSupplySnapshots); return snapshotted ? value : totalSupply(); } // Update balance and/or total supply snapshots before the values are modified. This is implemented // in the _beforeTokenTransfer hook, which is executed for _mint, _burn, and _transfer operations. function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual override { super._beforeTokenTransfer(from, to, amount); if (from == address(0)) { // mint _updateAccountSnapshot(to); _updateTotalSupplySnapshot(); } else if (to == address(0)) { // burn _updateAccountSnapshot(from); _updateTotalSupplySnapshot(); } else { // transfer _updateAccountSnapshot(from); _updateAccountSnapshot(to); } } function _valueAt(uint256 snapshotId, Snapshots storage snapshots) private view returns (bool, uint256) { require(snapshotId > 0, "ERC20Snapshot: id is 0"); // solhint-disable-next-line max-line-length require(snapshotId <= _currentSnapshotId.current(), "ERC20Snapshot: nonexistent id"); // When a valid snapshot is queried, there are three possibilities: // a) The queried value was not modified after the snapshot was taken. Therefore, a snapshot entry was never // created for this id, and all stored snapshot ids are smaller than the requested one. The value that corresponds // to this id is the current one. // b) The queried value was modified after the snapshot was taken. Therefore, there will be an entry with the // requested id, and its value is the one to return. // c) More snapshots were created after the requested one, and the queried value was later modified. There will be // no entry for the requested id: the value that corresponds to it is that of the smallest snapshot id that is // larger than the requested one. // // In summary, we need to find an element in an array, returning the index of the smallest value that is larger if // it is not found, unless said value doesn't exist (e.g. when all values are smaller). Arrays.findUpperBound does // exactly this. uint256 index = snapshots.ids.findUpperBound(snapshotId); if (index == snapshots.ids.length) { return (false, 0); } else { return (true, snapshots.values[index]); } } function _updateAccountSnapshot(address account) private { _updateSnapshot(_accountBalanceSnapshots[account], balanceOf(account)); } function _updateTotalSupplySnapshot() private { _updateSnapshot(_totalSupplySnapshots, totalSupply()); } function _updateSnapshot(Snapshots storage snapshots, uint256 currentValue) private { uint256 currentId = _currentSnapshotId.current(); if (_lastSnapshotId(snapshots.ids) < currentId) { snapshots.ids.push(currentId); snapshots.values.push(currentValue); } } function _lastSnapshotId(uint256[] storage ids) private view returns (uint256) { if (ids.length == 0) { return 0; } else { return ids[ids.length - 1]; } } } ntract VictoriaVR is Ownable, ERC20Burnable, ERC20Pausable, ERC20Snapshot { constructor(address totalSupplyTo) public ERC20("Victoria VR", "VR") { _mint(totalSupplyTo, 168000000000000000000000000000); } function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual override(ERC20, ERC20Pausable, ERC20Snapshot) { super._beforeTokenTransfer(from, to, amount); } function pause() public onlyOwner whenNotPaused { super._pause(); } function unpause() public onlyOwner whenPaused { super._unpause(); } function snapshot() public onlyOwner returns (uint256) { return super._snapshot(); } }

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{"success": true, "error": null, "results": {}}

0x7dbE30FDE1Eca6856806fF14fc456ec6791c73FE

pragma solidity 0.6.8; pragma experimental ABIEncoderV2; contract Initializable { /** * @dev Indicates that the contract has been initialized. */ bool private initialized; /** * @dev Indicates that the contract is in the process of being initialized. */ bool private initializing; /** * @dev Modifier to use in the initializer function of a contract. */ modifier initializer() { require(initializing || isConstructor() || !initialized, "Contract instance has already been initialized"); bool isTopLevelCall = !initializing; if (isTopLevelCall) { initializing = true; initialized = true; } _; if (isTopLevelCall) { initializing = false; } } /// @dev Returns true if and only if the function is running in the constructor function isConstructor() private view returns (bool) { // extcodesize checks the size of the code stored in an address, and // address returns the current address. Since the code is still not // deployed when running a constructor, any checks on its code size will // yield zero, making it an effective way to detect if a contract is // under construction or not. address self = address(this); uint256 cs; assembly { cs := extcodesize(self) } return cs == 0; } // Reserved storage space to allow for layout changes in the future. uint256[50] private ______gap; } library Math { /** * @dev Returns the largest of two numbers. */ function max(uint256 a, uint256 b) internal pure returns (uint256) { return a >= b ? a : b; } /** * @dev Returns the smallest of two numbers. */ function min(uint256 a, uint256 b) internal pure returns (uint256) { return a < b ? a : b; } /** * @dev Returns the average of two numbers. The result is rounded towards * zero. */ function average(uint256 a, uint256 b) internal pure returns (uint256) { // (a + b) / 2 can overflow, so we distribute return (a / 2) + (b / 2) + ((a % 2 + b % 2) / 2); } } library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { // Solidity only automatically asserts when dividing by 0 require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // According to EIP-1052, 0x0 is the value returned for not-yet created accounts // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned // for accounts without code, i.e. `keccak256('')` bytes32 codehash; bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470; // solhint-disable-next-line no-inline-assembly assembly { codehash := extcodehash(account) } return (codehash != accountHash && codehash != 0x0); } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } } library Accountant { using SafeMath for uint256; uint public constant interestDecimals = 1e18; uint public constant blocksPerDay = 5760; uint public constant blocksPerYear = (blocksPerDay * 365); struct PaymentAllocation { uint interestPayment; uint principalPayment; uint additionalBalancePayment; } function calculateInterestAndPrincipalAccrued(CreditLine cl, uint blockNumber) public view returns(uint, uint) { uint totalPayment = calculateAnnuityPayment(cl.balance(), cl.interestApr(), cl.termInDays(), cl.paymentPeriodInDays()); uint interestAccrued = calculateInterestAccrued(cl, blockNumber); uint principalAccrued = calculatePrincipalAccrued(cl, totalPayment, interestAccrued, blockNumber); return (interestAccrued, principalAccrued); } function calculatePrincipalAccrued(CreditLine cl, uint periodPayment, uint interestAccrued, uint blockNumber) public view returns(uint) { uint blocksPerPaymentPeriod = blocksPerDay * cl.paymentPeriodInDays(); // Math.min guards against overflow. See comment in the calculateInterestAccrued for further explanation. uint lastUpdatedBlock = Math.min(blockNumber, cl.lastUpdatedBlock()); uint numBlocksElapsed = blockNumber.sub(lastUpdatedBlock); int128 fractionOfPeriod = FPMath.divi(int256(numBlocksElapsed), int256(blocksPerPaymentPeriod)); uint periodPaymentFraction = uint(FPMath.muli(fractionOfPeriod, int256(periodPayment))); return periodPaymentFraction.sub(interestAccrued); } function calculateInterestAccrued(CreditLine cl, uint blockNumber) public view returns(uint) { // We use Math.min here to prevent integer overflow (ie. go negative) when calculating // numBlocksElapsed. Typically this shouldn't be possible, because // the lastUpdatedBlock couldn't be *after* the current blockNumber. However, when assessing // we allow this function to be called with a past block number, which raises the possibility // of overflow. // This use of min should not generate incorrect interest calculations, since // this functions purpose is just to normalize balances, and will be called any time // a balance affecting action takes place (eg. drawdown, repayment, assessment) uint lastUpdatedBlock = Math.min(blockNumber, cl.lastUpdatedBlock()); uint numBlocksElapsed = blockNumber.sub(lastUpdatedBlock); uint totalInterestPerYear = (cl.balance().mul(cl.interestApr())).div(interestDecimals); return totalInterestPerYear.mul(numBlocksElapsed).div(blocksPerYear); } function calculateAnnuityPayment(uint balance, uint interestApr, uint termInDays, uint paymentPeriodInDays) public pure returns(uint) { /* This is the standard amortization formula for an annuity payment amount. See: https://en.wikipedia.org/wiki/Amortization_calculator The specific formula we're interested in can be expressed as: `balance * (periodRate / (1 - (1 / ((1 + periodRate) ^ periods_per_term))))` FPMath is a library designed for emulating floating point numbers in solidity. At a high level, we are just turning all our uint256 numbers into floating points and doing the formula above, and then turning it back into an int64 at the end. */ // Components used in the formula uint periodsPerTerm = termInDays / paymentPeriodInDays; int128 one = FPMath.fromInt(int256(1)); int128 annualRate = FPMath.divi(int256(interestApr), int256(interestDecimals)); int128 dailyRate = FPMath.div(annualRate, FPMath.fromInt(int256(365))); int128 periodRate = FPMath.mul(dailyRate, FPMath.fromInt(int256(paymentPeriodInDays))); int128 termRate = FPMath.pow(FPMath.add(one, periodRate), periodsPerTerm); int128 denominator = FPMath.sub(one, FPMath.div(one, termRate)); if (denominator == 0) { return balance / periodsPerTerm; } int128 paymentFractionFP = FPMath.div(periodRate, denominator); uint paymentFraction = uint(FPMath.muli(paymentFractionFP, int256(1e18))); return (balance * paymentFraction) / 1e18; } function allocatePayment(uint paymentAmount, uint balance, uint interestOwed, uint principalOwed) public pure returns(PaymentAllocation memory) { uint paymentRemaining = paymentAmount; uint interestPayment = Math.min(interestOwed, paymentRemaining); paymentRemaining = paymentRemaining.sub(interestPayment); uint principalPayment = Math.min(principalOwed, paymentRemaining); paymentRemaining = paymentRemaining.sub(principalPayment); uint balanceRemaining = balance.sub(principalPayment); uint additionalBalancePayment = Math.min(paymentRemaining, balanceRemaining); return PaymentAllocation({ interestPayment: interestPayment, principalPayment: principalPayment, additionalBalancePayment: additionalBalancePayment }); } } ibrary FPMath { /** @dev * Minimum value signed 64.64-bit fixed point number may have. */ int128 private constant MIN_64x64 = -0x80000000000000000000000000000000; /** @dev * Maximum value signed 64.64-bit fixed point number may have. */ int128 private constant MAX_64x64 = 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF; /** * Convert signed 256-bit integer number into signed 64.64-bit fixed point * number. Revert on overflow. * * @param x signed 256-bit integer number * @return signed 64.64-bit fixed point number */ function fromInt (int256 x) internal pure returns (int128) { require (x >= -0x8000000000000000 && x <= 0x7FFFFFFFFFFFFFFF); return int128 (x << 64); } /** * Convert signed 64.64 fixed point number into signed 64-bit integer number * rounding down. * * @param x signed 64.64-bit fixed point number * @return signed 64-bit integer number */ function toInt (int128 x) internal pure returns (int64) { return int64 (x >> 64); } /** * Convert unsigned 256-bit integer number into signed 64.64-bit fixed point * number. Revert on overflow. * * @param x unsigned 256-bit integer number * @return signed 64.64-bit fixed point number */ function fromUInt (uint256 x) internal pure returns (int128) { require (x <= 0x7FFFFFFFFFFFFFFF); return int128 (x << 64); } /** * Convert signed 64.64 fixed point number into unsigned 64-bit integer * number rounding down. Revert on underflow. * * @param x signed 64.64-bit fixed point number * @return unsigned 64-bit integer number */ function toUInt (int128 x) internal pure returns (uint64) { require (x >= 0); return uint64 (x >> 64); } /** * Convert signed 128.128 fixed point number into signed 64.64-bit fixed point * number rounding down. Revert on overflow. * * @param x signed 128.128-bin fixed point number * @return signed 64.64-bit fixed point number */ function from128x128 (int256 x) internal pure returns (int128) { int256 result = x >> 64; require (result >= MIN_64x64 && result <= MAX_64x64); return int128 (result); } /** * Convert signed 64.64 fixed point number into signed 128.128 fixed point * number. * * @param x signed 64.64-bit fixed point number * @return signed 128.128 fixed point number */ function to128x128 (int128 x) internal pure returns (int256) { return int256 (x) << 64; } /** * Calculate x + y. Revert on overflow. * * @param x signed 64.64-bit fixed point number * @param y signed 64.64-bit fixed point number * @return signed 64.64-bit fixed point number */ function add (int128 x, int128 y) internal pure returns (int128) { int256 result = int256(x) + y; require (result >= MIN_64x64 && result <= MAX_64x64); return int128 (result); } /** * Calculate x - y. Revert on overflow. * * @param x signed 64.64-bit fixed point number * @param y signed 64.64-bit fixed point number * @return signed 64.64-bit fixed point number */ function sub (int128 x, int128 y) internal pure returns (int128) { int256 result = int256(x) - y; require (result >= MIN_64x64 && result <= MAX_64x64); return int128 (result); } /** * Calculate x * y rounding down. Revert on overflow. * * @param x signed 64.64-bit fixed point number * @param y signed 64.64-bit fixed point number * @return signed 64.64-bit fixed point number */ function mul (int128 x, int128 y) internal pure returns (int128) { int256 result = int256(x) * y >> 64; require (result >= MIN_64x64 && result <= MAX_64x64); return int128 (result); } /** * Calculate x * y rounding towards zero, where x is signed 64.64 fixed point * number and y is signed 256-bit integer number. Revert on overflow. * * @param x signed 64.64 fixed point number * @param y signed 256-bit integer number * @return signed 256-bit integer number */ function muli (int128 x, int256 y) internal pure returns (int256) { if (x == MIN_64x64) { require (y >= -0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF && y <= 0x1000000000000000000000000000000000000000000000000); return -y << 63; } else { bool negativeResult = false; if (x < 0) { x = -x; negativeResult = true; } if (y < 0) { y = -y; // We rely on overflow behavior here negativeResult = !negativeResult; } uint256 absoluteResult = mulu (x, uint256 (y)); if (negativeResult) { require (absoluteResult <= 0x8000000000000000000000000000000000000000000000000000000000000000); return -int256 (absoluteResult); // We rely on overflow behavior here } else { require (absoluteResult <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF); return int256 (absoluteResult); } } } /** * Calculate x * y rounding down, where x is signed 64.64 fixed point number * and y is unsigned 256-bit integer number. Revert on overflow. * * @param x signed 64.64 fixed point number * @param y unsigned 256-bit integer number * @return unsigned 256-bit integer number */ function mulu (int128 x, uint256 y) internal pure returns (uint256) { if (y == 0) return 0; require (x >= 0); uint256 lo = (uint256 (x) * (y & 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF)) >> 64; uint256 hi = uint256 (x) * (y >> 128); require (hi <= 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF); hi <<= 64; require (hi <= 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF - lo); return hi + lo; } /** * Calculate x / y rounding towards zero. Revert on overflow or when y is * zero. * * @param x signed 64.64-bit fixed point number * @param y signed 64.64-bit fixed point number * @return signed 64.64-bit fixed point number */ function div (int128 x, int128 y) internal pure returns (int128) { require (y != 0); int256 result = (int256 (x) << 64) / y; require (result >= MIN_64x64 && result <= MAX_64x64); return int128 (result); } /** * Calculate x / y rounding towards zero, where x and y are signed 256-bit * integer numbers. Revert on overflow or when y is zero. * * @param x signed 256-bit integer number * @param y signed 256-bit integer number * @return signed 64.64-bit fixed point number */ function divi (int256 x, int256 y) internal pure returns (int128) { require (y != 0); bool negativeResult = false; if (x < 0) { x = -x; // We rely on overflow behavior here negativeResult = true; } if (y < 0) { y = -y; // We rely on overflow behavior here negativeResult = !negativeResult; } uint128 absoluteResult = divuu (uint256 (x), uint256 (y)); if (negativeResult) { require (absoluteResult <= 0x80000000000000000000000000000000); return -int128 (absoluteResult); // We rely on overflow behavior here } else { require (absoluteResult <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF); return int128 (absoluteResult); // We rely on overflow behavior here } } /** * Calculate x / y rounding towards zero, where x and y are unsigned 256-bit * integer numbers. Revert on overflow or when y is zero. * * @param x unsigned 256-bit integer number * @param y unsigned 256-bit integer number * @return signed 64.64-bit fixed point number */ function divu (uint256 x, uint256 y) internal pure returns (int128) { require (y != 0); uint128 result = divuu (x, y); require (result <= uint128 (MAX_64x64)); return int128 (result); } /** * Calculate -x. Revert on overflow. * * @param x signed 64.64-bit fixed point number * @return signed 64.64-bit fixed point number */ function neg (int128 x) internal pure returns (int128) { require (x != MIN_64x64); return -x; } /** * Calculate |x|. Revert on overflow. * * @param x signed 64.64-bit fixed point number * @return signed 64.64-bit fixed point number */ function abs (int128 x) internal pure returns (int128) { require (x != MIN_64x64); return x < 0 ? -x : x; } /** * Calculate 1 / x rounding towards zero. Revert on overflow or when x is * zero. * * @param x signed 64.64-bit fixed point number * @return signed 64.64-bit fixed point number */ function inv (int128 x) internal pure returns (int128) { require (x != 0); int256 result = int256 (0x100000000000000000000000000000000) / x; require (result >= MIN_64x64 && result <= MAX_64x64); return int128 (result); } /** * Calculate arithmetics average of x and y, i.e. (x + y) / 2 rounding down. * * @param x signed 64.64-bit fixed point number * @param y signed 64.64-bit fixed point number * @return signed 64.64-bit fixed point number */ function avg (int128 x, int128 y) internal pure returns (int128) { return int128 ((int256 (x) + int256 (y)) >> 1); } /** * Calculate geometric average of x and y, i.e. sqrt (x * y) rounding down. * Revert on overflow or in case x * y is negative. * * @param x signed 64.64-bit fixed point number * @param y signed 64.64-bit fixed point number * @return signed 64.64-bit fixed point number */ function gavg (int128 x, int128 y) internal pure returns (int128) { int256 m = int256 (x) * int256 (y); require (m >= 0); require (m < 0x4000000000000000000000000000000000000000000000000000000000000000); return int128 (sqrtu (uint256 (m), uint256 (x) + uint256 (y) >> 1)); } /** * Calculate x^y assuming 0^0 is 1, where x is signed 64.64 fixed point number * and y is unsigned 256-bit integer number. Revert on overflow. * * @param x signed 64.64-bit fixed point number * @param y uint256 value * @return signed 64.64-bit fixed point number */ function pow (int128 x, uint256 y) internal pure returns (int128) { uint256 absoluteResult; bool negativeResult = false; if (x >= 0) { absoluteResult = powu (uint256 (x) << 63, y); } else { // We rely on overflow behavior here absoluteResult = powu (uint256 (uint128 (-x)) << 63, y); negativeResult = y & 1 > 0; } absoluteResult >>= 63; if (negativeResult) { require (absoluteResult <= 0x80000000000000000000000000000000); return -int128 (absoluteResult); // We rely on overflow behavior here } else { require (absoluteResult <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF); return int128 (absoluteResult); // We rely on overflow behavior here } } /** * Calculate sqrt (x) rounding down. Revert if x < 0. * * @param x signed 64.64-bit fixed point number * @return signed 64.64-bit fixed point number */ function sqrt (int128 x) internal pure returns (int128) { require (x >= 0); return int128 (sqrtu (uint256 (x) << 64, 0x10000000000000000)); } /** * Calculate binary logarithm of x. Revert if x <= 0. * * @param x signed 64.64-bit fixed point number * @return signed 64.64-bit fixed point number */ function log_2 (int128 x) internal pure returns (int128) { require (x > 0); int256 msb = 0; int256 xc = x; if (xc >= 0x10000000000000000) { xc >>= 64; msb += 64; } if (xc >= 0x100000000) { xc >>= 32; msb += 32; } if (xc >= 0x10000) { xc >>= 16; msb += 16; } if (xc >= 0x100) { xc >>= 8; msb += 8; } if (xc >= 0x10) { xc >>= 4; msb += 4; } if (xc >= 0x4) { xc >>= 2; msb += 2; } if (xc >= 0x2) msb += 1; // No need to shift xc anymore int256 result = msb - 64 << 64; uint256 ux = uint256 (x) << 127 - msb; for (int256 bit = 0x8000000000000000; bit > 0; bit >>= 1) { ux *= ux; uint256 b = ux >> 255; ux >>= 127 + b; result += bit * int256 (b); } return int128 (result); } /** * Calculate natural logarithm of x. Revert if x <= 0. * * @param x signed 64.64-bit fixed point number * @return signed 64.64-bit fixed point number */ function ln (int128 x) internal pure returns (int128) { require (x > 0); return int128 ( uint256 (log_2 (x)) * 0xB17217F7D1CF79ABC9E3B39803F2F6AF >> 128); } /** * Calculate binary exponent of x. Revert on overflow. * * @param x signed 64.64-bit fixed point number * @return signed 64.64-bit fixed point number */ function exp_2 (int128 x) internal pure returns (int128) { require (x < 0x400000000000000000); // Overflow if (x < -0x400000000000000000) return 0; // Underflow uint256 result = 0x80000000000000000000000000000000; if (x & 0x8000000000000000 > 0) result = result * 0x16A09E667F3BCC908B2FB1366EA957D3E >> 128; if (x & 0x4000000000000000 > 0) result = result * 0x1306FE0A31B7152DE8D5A46305C85EDEC >> 128; if (x & 0x2000000000000000 > 0) result = result * 0x1172B83C7D517ADCDF7C8C50EB14A791F >> 128; if (x & 0x1000000000000000 > 0) result = result * 0x10B5586CF9890F6298B92B71842A98363 >> 128; if (x & 0x800000000000000 > 0) result = result * 0x1059B0D31585743AE7C548EB68CA417FD >> 128; if (x & 0x400000000000000 > 0) result = result * 0x102C9A3E778060EE6F7CACA4F7A29BDE8 >> 128; if (x & 0x200000000000000 > 0) result = result * 0x10163DA9FB33356D84A66AE336DCDFA3F >> 128; if (x & 0x100000000000000 > 0) result = result * 0x100B1AFA5ABCBED6129AB13EC11DC9543 >> 128; if (x & 0x80000000000000 > 0) result = result * 0x10058C86DA1C09EA1FF19D294CF2F679B >> 128; if (x & 0x40000000000000 > 0) result = result * 0x1002C605E2E8CEC506D21BFC89A23A00F >> 128; if (x & 0x20000000000000 > 0) result = result * 0x100162F3904051FA128BCA9C55C31E5DF >> 128; if (x & 0x10000000000000 > 0) result = result * 0x1000B175EFFDC76BA38E31671CA939725 >> 128; if (x & 0x8000000000000 > 0) result = result * 0x100058BA01FB9F96D6CACD4B180917C3D >> 128; if (x & 0x4000000000000 > 0) result = result * 0x10002C5CC37DA9491D0985C348C68E7B3 >> 128; if (x & 0x2000000000000 > 0) result = result * 0x1000162E525EE054754457D5995292026 >> 128; if (x & 0x1000000000000 > 0) result = result * 0x10000B17255775C040618BF4A4ADE83FC >> 128; if (x & 0x800000000000 > 0) result = result * 0x1000058B91B5BC9AE2EED81E9B7D4CFAB >> 128; if (x & 0x400000000000 > 0) result = result * 0x100002C5C89D5EC6CA4D7C8ACC017B7C9 >> 128; if (x & 0x200000000000 > 0) result = result * 0x10000162E43F4F831060E02D839A9D16D >> 128; if (x & 0x100000000000 > 0) result = result * 0x100000B1721BCFC99D9F890EA06911763 >> 128; if (x & 0x80000000000 > 0) result = result * 0x10000058B90CF1E6D97F9CA14DBCC1628 >> 128; if (x & 0x40000000000 > 0) result = result * 0x1000002C5C863B73F016468F6BAC5CA2B >> 128; if (x & 0x20000000000 > 0) result = result * 0x100000162E430E5A18F6119E3C02282A5 >> 128; if (x & 0x10000000000 > 0) result = result * 0x1000000B1721835514B86E6D96EFD1BFE >> 128; if (x & 0x8000000000 > 0) result = result * 0x100000058B90C0B48C6BE5DF846C5B2EF >> 128; if (x & 0x4000000000 > 0) result = result * 0x10000002C5C8601CC6B9E94213C72737A >> 128; if (x & 0x2000000000 > 0) result = result * 0x1000000162E42FFF037DF38AA2B219F06 >> 128; if (x & 0x1000000000 > 0) result = result * 0x10000000B17217FBA9C739AA5819F44F9 >> 128; if (x & 0x800000000 > 0) result = result * 0x1000000058B90BFCDEE5ACD3C1CEDC823 >> 128; if (x & 0x400000000 > 0) result = result * 0x100000002C5C85FE31F35A6A30DA1BE50 >> 128; if (x & 0x200000000 > 0) result = result * 0x10000000162E42FF0999CE3541B9FFFCF >> 128; if (x & 0x100000000 > 0) result = result * 0x100000000B17217F80F4EF5AADDA45554 >> 128; if (x & 0x80000000 > 0) result = result * 0x10000000058B90BFBF8479BD5A81B51AD >> 128; if (x & 0x40000000 > 0) result = result * 0x1000000002C5C85FDF84BD62AE30A74CC >> 128; if (x & 0x20000000 > 0) result = result * 0x100000000162E42FEFB2FED257559BDAA >> 128; if (x & 0x10000000 > 0) result = result * 0x1000000000B17217F7D5A7716BBA4A9AE >> 128; if (x & 0x8000000 > 0) result = result * 0x100000000058B90BFBE9DDBAC5E109CCE >> 128; if (x & 0x4000000 > 0) result = result * 0x10000000002C5C85FDF4B15DE6F17EB0D >> 128; if (x & 0x2000000 > 0) result = result * 0x1000000000162E42FEFA494F1478FDE05 >> 128; if (x & 0x1000000 > 0) result = result * 0x10000000000B17217F7D20CF927C8E94C >> 128; if (x & 0x800000 > 0) result = result * 0x1000000000058B90BFBE8F71CB4E4B33D >> 128; if (x & 0x400000 > 0) result = result * 0x100000000002C5C85FDF477B662B26945 >> 128; if (x & 0x200000 > 0) result = result * 0x10000000000162E42FEFA3AE53369388C >> 128; if (x & 0x100000 > 0) result = result * 0x100000000000B17217F7D1D351A389D40 >> 128; if (x & 0x80000 > 0) result = result * 0x10000000000058B90BFBE8E8B2D3D4EDE >> 128; if (x & 0x40000 > 0) result = result * 0x1000000000002C5C85FDF4741BEA6E77E >> 128; if (x & 0x20000 > 0) result = result * 0x100000000000162E42FEFA39FE95583C2 >> 128; if (x & 0x10000 > 0) result = result * 0x1000000000000B17217F7D1CFB72B45E1 >> 128; if (x & 0x8000 > 0) result = result * 0x100000000000058B90BFBE8E7CC35C3F0 >> 128; if (x & 0x4000 > 0) result = result * 0x10000000000002C5C85FDF473E242EA38 >> 128; if (x & 0x2000 > 0) result = result * 0x1000000000000162E42FEFA39F02B772C >> 128; if (x & 0x1000 > 0) result = result * 0x10000000000000B17217F7D1CF7D83C1A >> 128; if (x & 0x800 > 0) result = result * 0x1000000000000058B90BFBE8E7BDCBE2E >> 128; if (x & 0x400 > 0) result = result * 0x100000000000002C5C85FDF473DEA871F >> 128; if (x & 0x200 > 0) result = result * 0x10000000000000162E42FEFA39EF44D91 >> 128; if (x & 0x100 > 0) result = result * 0x100000000000000B17217F7D1CF79E949 >> 128; if (x & 0x80 > 0) result = result * 0x10000000000000058B90BFBE8E7BCE544 >> 128; if (x & 0x40 > 0) result = result * 0x1000000000000002C5C85FDF473DE6ECA >> 128; if (x & 0x20 > 0) result = result * 0x100000000000000162E42FEFA39EF366F >> 128; if (x & 0x10 > 0) result = result * 0x1000000000000000B17217F7D1CF79AFA >> 128; if (x & 0x8 > 0) result = result * 0x100000000000000058B90BFBE8E7BCD6D >> 128; if (x & 0x4 > 0) result = result * 0x10000000000000002C5C85FDF473DE6B2 >> 128; if (x & 0x2 > 0) result = result * 0x1000000000000000162E42FEFA39EF358 >> 128; if (x & 0x1 > 0) result = result * 0x10000000000000000B17217F7D1CF79AB >> 128; result >>= 63 - (x >> 64); require (result <= uint256 (MAX_64x64)); return int128 (result); } /** * Calculate natural exponent of x. Revert on overflow. * * @param x signed 64.64-bit fixed point number * @return signed 64.64-bit fixed point number */ function exp (int128 x) internal pure returns (int128) { require (x < 0x400000000000000000); // Overflow if (x < -0x400000000000000000) return 0; // Underflow return exp_2 ( int128 (int256 (x) * 0x171547652B82FE1777D0FFDA0D23A7D12 >> 128)); } /** * Calculate x / y rounding towards zero, where x and y are unsigned 256-bit * integer numbers. Revert on overflow or when y is zero. * * @param x unsigned 256-bit integer number * @param y unsigned 256-bit integer number * @return unsigned 64.64-bit fixed point number */ function divuu (uint256 x, uint256 y) private pure returns (uint128) { require (y != 0); uint256 result; if (x <= 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF) result = (x << 64) / y; else { uint256 msb = 192; uint256 xc = x >> 192; if (xc >= 0x100000000) { xc >>= 32; msb += 32; } if (xc >= 0x10000) { xc >>= 16; msb += 16; } if (xc >= 0x100) { xc >>= 8; msb += 8; } if (xc >= 0x10) { xc >>= 4; msb += 4; } if (xc >= 0x4) { xc >>= 2; msb += 2; } if (xc >= 0x2) msb += 1; // No need to shift xc anymore result = (x << 255 - msb) / ((y - 1 >> msb - 191) + 1); require (result <= 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF); uint256 hi = result * (y >> 128); uint256 lo = result * (y & 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF); uint256 xh = x >> 192; uint256 xl = x << 64; if (xl < lo) xh -= 1; xl -= lo; // We rely on overflow behavior here lo = hi << 128; if (xl < lo) xh -= 1; xl -= lo; // We rely on overflow behavior here assert (xh == hi >> 128); result += xl / y; } require (result <= 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF); return uint128 (result); } /** * Calculate x^y assuming 0^0 is 1, where x is unsigned 129.127 fixed point * number and y is unsigned 256-bit integer number. Revert on overflow. * * @param x unsigned 129.127-bit fixed point number * @param y uint256 value * @return unsigned 129.127-bit fixed point number */ function powu (uint256 x, uint256 y) private pure returns (uint256) { if (y == 0) return 0x80000000000000000000000000000000; else if (x == 0) return 0; else { int256 msb = 0; uint256 xc = x; if (xc >= 0x100000000000000000000000000000000) { xc >>= 128; msb += 128; } if (xc >= 0x10000000000000000) { xc >>= 64; msb += 64; } if (xc >= 0x100000000) { xc >>= 32; msb += 32; } if (xc >= 0x10000) { xc >>= 16; msb += 16; } if (xc >= 0x100) { xc >>= 8; msb += 8; } if (xc >= 0x10) { xc >>= 4; msb += 4; } if (xc >= 0x4) { xc >>= 2; msb += 2; } if (xc >= 0x2) msb += 1; // No need to shift xc anymore int256 xe = msb - 127; if (xe > 0) x >>= xe; else x <<= -xe; uint256 result = 0x80000000000000000000000000000000; int256 re = 0; while (y > 0) { if (y & 1 > 0) { result = result * x; y -= 1; re += xe; if (result >= 0x8000000000000000000000000000000000000000000000000000000000000000) { result >>= 128; re += 1; } else result >>= 127; if (re < -127) return 0; // Underflow require (re < 128); // Overflow } else { x = x * x; y >>= 1; xe <<= 1; if (x >= 0x8000000000000000000000000000000000000000000000000000000000000000) { x >>= 128; xe += 1; } else x >>= 127; if (xe < -127) return 0; // Underflow require (xe < 128); // Overflow } } if (re > 0) result <<= re; else if (re < 0) result >>= -re; return result; } } /** * Calculate sqrt (x) rounding down, where x is unsigned 256-bit integer * number. * * @param x unsigned 256-bit integer number * @return unsigned 128-bit integer number */ function sqrtu (uint256 x, uint256 r) private pure returns (uint128) { if (x == 0) return 0; else { require (r > 0); while (true) { uint256 rr = x / r; if (r == rr || r + 1 == rr) return uint128 (r); else if (r == rr + 1) return uint128 (rr); r = r + rr + 1 >> 1; } } } } contract ContextUpgradeSafe is Initializable { // Empty internal constructor, to prevent people from mistakenly deploying // an instance of this contract, which should be used via inheritance. function __Context_init() internal initializer { __Context_init_unchained(); } function __Context_init_unchained() internal initializer { } function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } uint256[50] private __gap; } contract OwnableUpgradeSafe is Initializable, ContextUpgradeSafe { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ function __Ownable_init() internal initializer { __Context_init_unchained(); __Ownable_init_unchained(); } function __Ownable_init_unchained() internal initializer { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), msgSender); } /** * @dev Returns the address of the current owner. */ function owner() public view returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(_owner == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { emit OwnershipTransferred(_owner, address(0)); _owner = address(0); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } uint256[49] private __gap; } contract ERC20UpgradeSafe is Initializable, ContextUpgradeSafe, IERC20 { using SafeMath for uint256; using Address for address; mapping (address => uint256) private _balances; mapping (address => mapping (address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; uint8 private _decimals; /** * @dev Sets the values for {name} and {symbol}, initializes {decimals} with * a default value of 18. * * To select a different value for {decimals}, use {_setupDecimals}. * * All three of these values are immutable: they can only be set once during * construction. */ function __ERC20_init(string memory name, string memory symbol) internal initializer { __Context_init_unchained(); __ERC20_init_unchained(name, symbol); } function __ERC20_init_unchained(string memory name, string memory symbol) internal initializer { _name = name; _symbol = symbol; _decimals = 18; } /** * @dev Returns the name of the token. */ function name() public view returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5,05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is * called. * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view returns (uint8) { return _decimals; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `recipient` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address recipient, uint256 amount) public virtual override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { _approve(_msgSender(), spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}; * * Requirements: * - `sender` and `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. * - the caller must have allowance for ``sender``'s tokens of at least * `amount`. */ function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) { _transfer(sender, recipient, amount); _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance")); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue)); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero")); return true; } /** * @dev Moves tokens `amount` from `sender` to `recipient`. * * This is internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `sender` cannot be the zero address. * - `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. */ function _transfer(address sender, address recipient, uint256 amount) internal virtual { require(sender != address(0), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(sender, recipient, amount); _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance"); _balances[recipient] = _balances[recipient].add(amount); emit Transfer(sender, recipient, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements * * - `to` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply = _totalSupply.add(amount); _balances[account] = _balances[account].add(amount); emit Transfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance"); _totalSupply = _totalSupply.sub(amount); emit Transfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens. * * This is internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve(address owner, address spender, uint256 amount) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Sets {decimals} to a value other than the default one of 18. * * WARNING: This function should only be called from the constructor. Most * applications that interact with token contracts will not expect * {decimals} to ever change, and may work incorrectly if it does. */ function _setupDecimals(uint8 decimals_) internal { _decimals = decimals_; } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be to transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { } uint256[44] private __gap; } contract PausableUpgradeSafe is Initializable, ContextUpgradeSafe { /** * @dev Emitted when the pause is triggered by `account`. */ event Paused(address account); /** * @dev Emitted when the pause is lifted by `account`. */ event Unpaused(address account); bool private _paused; /** * @dev Initializes the contract in unpaused state. */ function __Pausable_init() internal initializer { __Context_init_unchained(); __Pausable_init_unchained(); } function __Pausable_init_unchained() internal initializer { _paused = false; } /** * @dev Returns true if the contract is paused, and false otherwise. */ function paused() public view returns (bool) { return _paused; } /** * @dev Modifier to make a function callable only when the contract is not paused. */ modifier whenNotPaused() { require(!_paused, "Pausable: paused"); _; } /** * @dev Modifier to make a function callable only when the contract is paused. */ modifier whenPaused() { require(_paused, "Pausable: not paused"); _; } /** * @dev Triggers stopped state. */ function _pause() internal virtual whenNotPaused { _paused = true; emit Paused(_msgSender()); } /** * @dev Returns to normal state. */ function _unpause() internal virtual whenPaused { _paused = false; emit Unpaused(_msgSender()); } uint256[49] private __gap; } contract CreditLine is Initializable, OwnableUpgradeSafe { // Credit line terms address public borrower; uint public collateral; uint public limit; uint public interestApr; uint public minCollateralPercent; uint public paymentPeriodInDays; uint public termInDays; // Accounting variables uint public balance; uint public interestOwed; uint public principalOwed; uint public prepaymentBalance; uint public collateralBalance; uint public termEndBlock; uint public nextDueBlock; uint public lastUpdatedBlock; function initialize( address _borrower, uint _limit, uint _interestApr, uint _minCollateralPercent, uint _paymentPeriodInDays, uint _termInDays ) public initializer { __Ownable_init(); borrower = _borrower; limit = _limit; interestApr = _interestApr; minCollateralPercent = _minCollateralPercent; paymentPeriodInDays = _paymentPeriodInDays; termInDays = _termInDays; lastUpdatedBlock = block.number; } function setTermEndBlock(uint newTermEndBlock) external onlyOwner returns (uint) { return termEndBlock = newTermEndBlock; } function setNextDueBlock(uint newNextDueBlock) external onlyOwner returns (uint) { return nextDueBlock = newNextDueBlock; } function setBalance(uint newBalance) external onlyOwner returns(uint) { return balance = newBalance; } function setInterestOwed(uint newInterestOwed) external onlyOwner returns (uint) { return interestOwed = newInterestOwed; } function setPrincipalOwed(uint newPrincipalOwed) external onlyOwner returns (uint) { return principalOwed = newPrincipalOwed; } function setPrepaymentBalance(uint newPrepaymentBalance) external onlyOwner returns (uint) { return prepaymentBalance = newPrepaymentBalance; } function setCollateralBalance(uint newCollateralBalance) external onlyOwner returns (uint) { return collateralBalance = newCollateralBalance; } function setLastUpdatedBlock(uint newLastUpdatedBlock) external onlyOwner returns (uint) { return lastUpdatedBlock = newLastUpdatedBlock; } function authorizePool(address poolAddress) external onlyOwner { address erc20address = Pool(poolAddress).erc20address(); // Approve the pool for an infinite amount ERC20UpgradeSafe(erc20address).approve(poolAddress, uint(-1)); } } contract OwnerPausable is OwnableUpgradeSafe, PausableUpgradeSafe { function __OwnerPausable__init() public { __Pausable_init_unchained(); } /** * @dev Pauses all functions guarded by Pause * * See {Pausable-_pause}. * * Requirements: * * - the caller must be the owner. */ function pause() public onlyOwner { _pause(); } /** * @dev Unpauses the contract * * See {Pausable-_unpause}. * * Requirements: * * - the caller must be the owner`. */ function unpause() public onlyOwner { _unpause(); } } contract Pool is Initializable, OwnableUpgradeSafe, OwnerPausable { using SafeMath for uint256; uint public sharePrice; uint mantissa; uint public totalShares; mapping(address => uint) public capitalProviders; address public erc20address; string name; uint public totalFundsLimit = 0; uint public transactionLimit = 0; event DepositMade(address indexed capitalProvider, uint amount); event WithdrawalMade(address indexed capitalProvider, uint amount); event TransferMade(address indexed from, address indexed to, uint amount); event InterestCollected(address indexed payer, uint amount); event PrincipalCollected(address indexed payer, uint amount); event LimitChanged(address indexed owner, string limitType, uint amount); function initialize(address _erc20address, string memory _name, uint _mantissa) public initializer { __Context_init_unchained(); __Ownable_init_unchained(); __OwnerPausable__init(); name = _name; erc20address = _erc20address; mantissa = _mantissa; sharePrice = _mantissa; // Sanity check the address ERC20UpgradeSafe(erc20address).totalSupply(); // Unlock self for infinite amount ERC20UpgradeSafe(erc20address).approve(address(this), uint(-1)); } function deposit(uint amount) external payable whenNotPaused { require(transactionWithinLimit(amount), "Amount is over the per-transaction limit."); // Determine current shares the address has, and the amount of new shares to be added uint currentShares = capitalProviders[msg.sender]; uint depositShares = getNumShares(amount, mantissa, sharePrice); uint potentialNewTotalShares = totalShares.add(depositShares); require(poolWithinLimit(potentialNewTotalShares), "Deposit would put the Pool over the total limit."); doERC20Transfer(msg.sender, address(this), amount); // Add the new shares to both the pool and the address totalShares = totalShares.add(depositShares); capitalProviders[msg.sender] = currentShares.add(depositShares); emit DepositMade(msg.sender, amount); } function withdraw(uint amount) external whenNotPaused { // Determine current shares the address has and the shares requested to withdraw require(transactionWithinLimit(amount), "Amount is over the per-transaction limit"); uint currentShares = capitalProviders[msg.sender]; uint withdrawShares = getNumShares(amount, mantissa, sharePrice); // Ensure the address has enough value in the pool require(withdrawShares <= currentShares, "Amount requested is greater than what this address owns"); // Remove the new shares from both the pool and the address totalShares = totalShares.sub(withdrawShares); capitalProviders[msg.sender] = currentShares.sub(withdrawShares); // Send the amount to the address doERC20Transfer(address(this), msg.sender, amount); emit WithdrawalMade(msg.sender, amount); } function collectInterestRepayment(address from, uint amount) external whenNotPaused { doERC20Transfer(from, address(this), amount); uint increment = amount.mul(mantissa).div(totalShares); sharePrice = sharePrice + increment; emit InterestCollected(from, amount); } function collectPrincipalRepayment(address from, uint amount) external whenNotPaused { // Purposefully does nothing except receive money. No share price updates for principal. doERC20Transfer(from, address(this), amount); emit PrincipalCollected(from, amount); } function setTotalFundsLimit(uint amount) public onlyOwner whenNotPaused { totalFundsLimit = amount; emit LimitChanged(msg.sender, "totalFundsLimit", amount); } function setTransactionLimit(uint amount) public onlyOwner whenNotPaused { transactionLimit = amount; emit LimitChanged(msg.sender, "transactionLimit", amount); } function transferFrom(address from, address to, uint amount) public onlyOwner whenNotPaused returns (bool) { bool result = doERC20Transfer(from, to, amount); emit TransferMade(from, to, amount); return result; } function enoughBalance(address user, uint amount) public view whenNotPaused returns(bool) { return ERC20UpgradeSafe(erc20address).balanceOf(user) >= amount; } /* Internal Functions */ function poolWithinLimit(uint _totalShares) internal view returns (bool) { return _totalShares.mul(sharePrice).div(mantissa) <= totalFundsLimit; } function transactionWithinLimit(uint amount) internal view returns (bool) { return amount <= transactionLimit; } function getNumShares(uint amount, uint multiplier, uint price) internal pure returns (uint) { return amount.mul(multiplier).div(price); } function doERC20Transfer(address from, address to, uint amount) internal returns (bool) { ERC20UpgradeSafe erc20 = ERC20UpgradeSafe(erc20address); uint balanceBefore = erc20.balanceOf(to); bool success = erc20.transferFrom(from, to, amount); // Calculate the amount that was *actually* transferred uint balanceAfter = erc20.balanceOf(to); require(balanceAfter >= balanceBefore, "Token Transfer Overflow Error"); return success; } function doERC20Withdraw(address payable to, uint amount) internal returns (bool) { ERC20UpgradeSafe erc20 = ERC20UpgradeSafe(erc20address); bool success = erc20.transfer(to, amount); require(success, "Token Withdraw Failed"); return success; } } contract FakeV2CreditDesk is Initializable, OwnableUpgradeSafe, OwnerPausable { using SafeMath for uint256; // Approximate number of blocks uint public constant blocksPerDay = 5760; address public poolAddress; uint public maxUnderwriterLimit = 0; uint public transactionLimit = 0; struct Underwriter { uint governanceLimit; address[] creditLines; } struct Borrower { address[] creditLines; } event PaymentMade(address indexed payer, address indexed creditLine, uint interestAmount, uint principalAmount, uint remainingAmount); event PrepaymentMade(address indexed payer, address indexed creditLine, uint prepaymentAmount); event DrawdownMade(address indexed borrower, address indexed creditLine, uint drawdownAmount); event CreditLineCreated(address indexed borrower, address indexed creditLine); event PoolAddressUpdated(address indexed oldAddress, address indexed newAddress); event GovernanceUpdatedUnderwriterLimit(address indexed underwriter, uint newLimit); event LimitChanged(address indexed owner, string limitType, uint amount); mapping(address => Underwriter) public underwriters; mapping(address => Borrower) private borrowers; function initialize(address _poolAddress) public initializer { __Ownable_init(); poolAddress = _poolAddress; } function someBrandNewFunction() public pure returns(uint) { return 5; } function getUnderwriterCreditLines(address underwriterAddress) public view returns (address[] memory) { return underwriters[underwriterAddress].creditLines; } /* * Internal Functions */ } contract TestERC20 is ERC20UpgradeSafe { constructor(uint256 initialSupply, uint8 decimals) public { __ERC20_init("USDC", "USDC"); _setupDecimals(decimals); _mint(msg.sender, initialSupply); } } contract TestPool is Pool { function _getNumShares(uint amount, uint multiplier, uint price) public pure returns (uint) { return getNumShares(amount, multiplier, price); } } contract CreditDesk is Initializable, OwnableUpgradeSafe, OwnerPausable { using SafeMath for uint256; // Approximate number of blocks uint public constant blocksPerDay = 5760; address public poolAddress; uint public maxUnderwriterLimit = 0; uint public transactionLimit = 0; struct Underwriter { uint governanceLimit; address[] creditLines; } struct Borrower { address[] creditLines; } event PaymentMade(address indexed payer, address indexed creditLine, uint interestAmount, uint principalAmount, uint remainingAmount); event PrepaymentMade(address indexed payer, address indexed creditLine, uint prepaymentAmount); event DrawdownMade(address indexed borrower, address indexed creditLine, uint drawdownAmount); event CreditLineCreated(address indexed borrower, address indexed creditLine); event PoolAddressUpdated(address indexed oldAddress, address indexed newAddress); event GovernanceUpdatedUnderwriterLimit(address indexed underwriter, uint newLimit); event LimitChanged(address indexed owner, string limitType, uint amount); mapping(address => Underwriter) public underwriters; mapping(address => Borrower) private borrowers; function initialize(address _poolAddress) public initializer { __Ownable_init(); __OwnerPausable__init(); setPoolAddress(_poolAddress); } function setUnderwriterGovernanceLimit(address underwriterAddress, uint limit) external onlyOwner whenNotPaused { Underwriter storage underwriter = underwriters[underwriterAddress]; require(withinMaxUnderwriterLimit(limit), "This limit is greater than the max allowed by the protocol"); underwriter.governanceLimit = limit; emit GovernanceUpdatedUnderwriterLimit(underwriterAddress, limit); } function createCreditLine(address _borrower, uint _limit, uint _interestApr, uint _minCollateralPercent, uint _paymentPeriodInDays, uint _termInDays) external whenNotPaused { Underwriter storage underwriter = underwriters[msg.sender]; Borrower storage borrower = borrowers[_borrower]; require(underwriterCanCreateThisCreditLine(_limit, underwriter), "The underwriter cannot create this credit line"); CreditLine cl = new CreditLine(); cl.initialize(_borrower, _limit, _interestApr, _minCollateralPercent, _paymentPeriodInDays, _termInDays); cl.authorizePool(poolAddress); underwriter.creditLines.push(address(cl)); borrower.creditLines.push(address(cl)); emit CreditLineCreated(_borrower, address(cl)); } function drawdown(uint amount, address creditLineAddress) external whenNotPaused { CreditLine cl = CreditLine(creditLineAddress); require(cl.borrower() == msg.sender, "You do not belong to this credit line"); // Not strictly necessary, but provides a better error message to the user require(getPool().enoughBalance(poolAddress, amount), "Pool does not have enough balance for this drawdown"); require(withinTransactionLimit(amount), "Amount is over the per-transaction limit"); require(withinCreditLimit(amount, cl), "The borrower does not have enough credit limit for this drawdown"); if (cl.balance() == 0) { cl.setTermEndBlock(calculateNewTermEndBlock(cl)); cl.setNextDueBlock(calculateNextDueBlock(cl)); } (uint interestOwed, uint principalOwed) = getInterestAndPrincipalOwedAsOf(cl, block.number); uint balance = cl.balance().add(amount); updateCreditLineAccounting(cl, balance, interestOwed, principalOwed); getPool().transferFrom(poolAddress, msg.sender, amount); emit DrawdownMade(msg.sender, address(cl), amount); } function pay(address creditLineAddress, uint amount) external payable whenNotPaused { CreditLine cl = CreditLine(creditLineAddress); require(withinTransactionLimit(amount), "Amount is over the per-transaction limit"); // Not strictly necessary, but provides a faster/better error message to the user require(getPool().enoughBalance(msg.sender, amount), "You have insufficent balance for this payment"); (uint paymentRemaining, uint interestPayment, uint principalPayment) = handlePayment(cl, amount, block.number, true); if (paymentRemaining > 0) { getPool().transferFrom(msg.sender, creditLineAddress, paymentRemaining); cl.setCollateralBalance(cl.collateralBalance().add(paymentRemaining)); } if (interestPayment > 0) { getPool().collectInterestRepayment(msg.sender, interestPayment); } if (principalPayment > 0) { getPool().collectPrincipalRepayment(msg.sender, principalPayment); } emit PaymentMade(cl.borrower(), address(cl), interestPayment, principalPayment, paymentRemaining); } function prepay(address payable creditLineAddress, uint amount) external payable whenNotPaused { CreditLine cl = CreditLine(creditLineAddress); require(withinTransactionLimit(amount), "Amount is over the per-transaction limit"); getPool().transferFrom(msg.sender, creditLineAddress, amount); uint newPrepaymentBalance = cl.prepaymentBalance().add(amount); cl.setPrepaymentBalance(newPrepaymentBalance); emit PrepaymentMade(msg.sender, address(cl), amount); } function addCollateral(address payable creditLineAddress, uint amount) external payable whenNotPaused { CreditLine cl = CreditLine(creditLineAddress); getPool().transferFrom(msg.sender, creditLineAddress, amount); uint newCollateralBalance = cl.collateralBalance().add(amount); cl.setCollateralBalance(newCollateralBalance); } function assessCreditLine(address creditLineAddress) external whenNotPaused { CreditLine cl = CreditLine(creditLineAddress); // Do not assess until a full period has elapsed if (block.number < cl.nextDueBlock()) { return; } (uint paymentRemaining, uint interestPayment, uint principalPayment) = handlePayment(cl, cl.prepaymentBalance(), cl.nextDueBlock(), false); cl.setPrepaymentBalance(paymentRemaining); getPool().collectInterestRepayment(msg.sender, interestPayment); getPool().collectPrincipalRepayment(msg.sender, principalPayment); cl.setNextDueBlock(calculateNextDueBlock(cl)); if (cl.principalOwed() > 0) { handleLatePayments(cl); } emit PaymentMade(cl.borrower(), address(cl), interestPayment, principalPayment, paymentRemaining); } function setPoolAddress(address newPoolAddress) public onlyOwner whenNotPaused returns (address) { // Sanity check the new address; Pool(newPoolAddress).totalShares(); emit PoolAddressUpdated(poolAddress, newPoolAddress); return poolAddress = newPoolAddress; } function setMaxUnderwriterLimit(uint amount) public onlyOwner whenNotPaused { maxUnderwriterLimit = amount; emit LimitChanged(msg.sender, "maxUnderwriterLimit", amount); } function setTransactionLimit(uint amount) public onlyOwner whenNotPaused { transactionLimit = amount; emit LimitChanged(msg.sender, "transactionLimit", amount); } // Public View Functions (Getters) function getUnderwriterCreditLines(address underwriterAddress) public view whenNotPaused returns (address[] memory) { return underwriters[underwriterAddress].creditLines; } function getBorrowerCreditLines(address borrowerAddress) public view whenNotPaused returns (address[] memory) { return borrowers[borrowerAddress].creditLines; } /* * Internal Functions */ function handlePayment(CreditLine cl, uint paymentAmount, uint asOfBlock, bool allowFullBalancePayOff) internal returns (uint, uint, uint) { (uint interestOwed, uint principalOwed) = getInterestAndPrincipalOwedAsOf(cl, asOfBlock); Accountant.PaymentAllocation memory pa = Accountant.allocatePayment(paymentAmount, cl.balance(), interestOwed, principalOwed); uint newBalance = cl.balance().sub(pa.principalPayment); if (allowFullBalancePayOff) { newBalance = newBalance.sub(pa.additionalBalancePayment); } uint totalPrincipalPayment = cl.balance().sub(newBalance); uint paymentRemaining = paymentAmount.sub(pa.interestPayment).sub(totalPrincipalPayment); updateCreditLineAccounting(cl, newBalance, interestOwed.sub(pa.interestPayment), principalOwed.sub(pa.principalPayment)); assert(paymentRemaining.add(pa.interestPayment).add(totalPrincipalPayment) == paymentAmount); return (paymentRemaining, pa.interestPayment, totalPrincipalPayment); } function handleLatePayments(CreditLine cl) internal { // No op for now; } function getPool() internal view returns (Pool) { return Pool(poolAddress); } function getInterestAndPrincipalOwedAsOf(CreditLine cl, uint blockNumber) internal view returns (uint, uint) { (uint interestAccrued, uint principalAccrued) = Accountant.calculateInterestAndPrincipalAccrued(cl, blockNumber); return (cl.interestOwed().add(interestAccrued), cl.principalOwed().add(principalAccrued)); } function withinCreditLimit(uint amount, CreditLine cl) internal view returns(bool) { return cl.balance().add(amount) <= cl.limit(); } function withinTransactionLimit(uint amount) internal view returns(bool) { return amount <= transactionLimit; } function calculateNewTermEndBlock(CreditLine cl) internal view returns (uint) { return block.number.add(blocksPerDay.mul(cl.termInDays())); } function calculateNextDueBlock(CreditLine cl) internal view returns (uint) { uint blocksPerPeriod = cl.paymentPeriodInDays().mul(blocksPerDay); uint currentNextDueBlock; if (cl.nextDueBlock() != 0) { currentNextDueBlock = cl.nextDueBlock(); } else { currentNextDueBlock = block.number; } return currentNextDueBlock.add(blocksPerPeriod); } function underwriterCanCreateThisCreditLine(uint newAmount, Underwriter storage underwriter) internal view returns(bool) { uint creditCurrentlyExtended = getCreditCurrentlyExtended(underwriter); uint totalToBeExtended = creditCurrentlyExtended.add(newAmount); return totalToBeExtended <= underwriter.governanceLimit; } function withinMaxUnderwriterLimit(uint amount) internal view returns (bool) { return amount <= maxUnderwriterLimit; } function getCreditCurrentlyExtended(Underwriter storage underwriter) internal view returns (uint) { uint creditExtended = 0; for (uint i = 0; i < underwriter.creditLines.length; i++) { CreditLine cl = CreditLine(underwriter.creditLines[i]); creditExtended = creditExtended.add(cl.limit()); } return creditExtended; } function updateCreditLineAccounting(CreditLine cl, uint balance, uint interestOwed, uint principalOwed) internal { cl.setBalance(balance); cl.setInterestOwed(interestOwed); cl.setPrincipalOwed(principalOwed); cl.setLastUpdatedBlock(block.number); if (balance == 0) { cl.setTermEndBlock(0); cl.setNextDueBlock(0); } } }

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{"success": true, "error": null, "results": {"detectors": [{"check": "uninitialized-state", "impact": "High", "confidence": "High"}, {"check": "divide-before-multiply", "impact": "Medium", "confidence": "Medium"}, {"check": "reentrancy-no-eth", "impact": "Medium", "confidence": "Medium"}, {"check": "incorrect-equality", "impact": "Medium", "confidence": "High"}, {"check": "unchecked-transfer", "impact": "High", "confidence": "Medium"}, {"check": "unused-return", "impact": "Medium", "confidence": "Medium"}, {"check": "locked-ether", "impact": "Medium", "confidence": "High"}]}}

0x7DD62Cc8b0fEa7D0947Ca89b3FC24967401AF713

pragma solidity 0.6.12; pragma experimental ABIEncoderV2; contract DSAuthEvents { event LogSetAuthority(address indexed authority); event LogSetOwner(address indexed owner); } contract DSAuth is DSAuthEvents { DSAuthority public authority; address public owner; constructor() public { owner = msg.sender; emit LogSetOwner(msg.sender); } function setOwner(address owner_) public auth { owner = owner_; emit LogSetOwner(owner); } function setAuthority(DSAuthority authority_) public auth { authority = authority_; emit LogSetAuthority(address(authority)); } modifier auth { require(isAuthorized(msg.sender, msg.sig)); _; } function isAuthorized(address src, bytes4 sig) internal view returns (bool) { if (src == address(this)) { return true; } else if (src == owner) { return true; } else if (authority == DSAuthority(0)) { return false; } else { return authority.canCall(src, address(this), sig); } } } abstract contract DSAuthority { function canCall(address src, address dst, bytes4 sig) public virtual view returns (bool); } abstract contract DSGuard { function canCall(address src_, address dst_, bytes4 sig) public view virtual returns (bool); function permit(bytes32 src, bytes32 dst, bytes32 sig) public virtual; function forbid(bytes32 src, bytes32 dst, bytes32 sig) public virtual; function permit(address src, address dst, bytes32 sig) public virtual; function forbid(address src, address dst, bytes32 sig) public virtual; } abstract contract DSGuardFactory { function newGuard() public virtual returns (DSGuard guard); } contract DSMath { function add(uint256 x, uint256 y) internal pure returns (uint256 z) { require((z = x + y) >= x); } function sub(uint256 x, uint256 y) internal pure returns (uint256 z) { require((z = x - y) <= x); } function mul(uint256 x, uint256 y) internal pure returns (uint256 z) { require(y == 0 || (z = x * y) / y == x); } function div(uint256 x, uint256 y) internal pure returns (uint256 z) { return x / y; } function min(uint256 x, uint256 y) internal pure returns (uint256 z) { return x <= y ? x : y; } function max(uint256 x, uint256 y) internal pure returns (uint256 z) { return x >= y ? x : y; } function imin(int256 x, int256 y) internal pure returns (int256 z) { return x <= y ? x : y; } function imax(int256 x, int256 y) internal pure returns (int256 z) { return x >= y ? x : y; } uint256 constant WAD = 10**18; uint256 constant RAY = 10**27; function wmul(uint256 x, uint256 y) internal pure returns (uint256 z) { z = add(mul(x, y), WAD / 2) / WAD; } function rmul(uint256 x, uint256 y) internal pure returns (uint256 z) { z = add(mul(x, y), RAY / 2) / RAY; } function wdiv(uint256 x, uint256 y) internal pure returns (uint256 z) { z = add(mul(x, WAD), y / 2) / y; } function rdiv(uint256 x, uint256 y) internal pure returns (uint256 z) { z = add(mul(x, RAY), y / 2) / y; } // This famous algorithm is called "exponentiation by squaring" // and calculates x^n with x as fixed-point and n as regular unsigned. // // It's O(log n), instead of O(n) for naive repeated multiplication. // // These facts are why it works: // // If n is even, then x^n = (x^2)^(n/2). // If n is odd, then x^n = x * x^(n-1), // and applying the equation for even x gives // x^n = x * (x^2)^((n-1) / 2). // // Also, EVM division is flooring and // floor[(n-1) / 2] = floor[n / 2]. // function rpow(uint256 x, uint256 n) internal pure returns (uint256 z) { z = n % 2 != 0 ? x : RAY; for (n /= 2; n != 0; n /= 2) { x = rmul(x, x); if (n % 2 != 0) { z = rmul(z, x); } } } } contract DSNote { event LogNote( bytes4 indexed sig, address indexed guy, bytes32 indexed foo, bytes32 indexed bar, uint256 wad, bytes fax ) anonymous; modifier note { bytes32 foo; bytes32 bar; assembly { foo := calldataload(4) bar := calldataload(36) } emit LogNote(msg.sig, msg.sender, foo, bar, msg.value, msg.data); _; } } abstract contract DSProxy is DSAuth, DSNote { DSProxyCache public cache; // global cache for contracts constructor(address _cacheAddr) public { require(setCache(_cacheAddr)); } // solhint-disable-next-line no-empty-blocks receive() external payable {} // use the proxy to execute calldata _data on contract _code // function execute(bytes memory _code, bytes memory _data) // public // payable // virtual // returns (address target, bytes32 response); function execute(address _target, bytes memory _data) public payable virtual returns (bytes32 response); //set new cache function setCache(address _cacheAddr) public virtual payable returns (bool); } contract DSProxyCache { mapping(bytes32 => address) cache; function read(bytes memory _code) public view returns (address) { bytes32 hash = keccak256(_code); return cache[hash]; } function write(bytes memory _code) public returns (address target) { assembly { target := create(0, add(_code, 0x20), mload(_code)) switch iszero(extcodesize(target)) case 1 { // throw if contract failed to deploy revert(0, 0) } } bytes32 hash = keccak256(_code); cache[hash] = target; } } abstract contract DSProxyFactoryInterface { function build(address owner) public virtual returns (DSProxy proxy); } contract AaveHelper is DSMath { using SafeERC20 for ERC20; address payable public constant WALLET_ADDR = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; address public constant DISCOUNT_ADDR = 0x1b14E8D511c9A4395425314f849bD737BAF8208F; uint public constant MANUAL_SERVICE_FEE = 400; // 0.25% Fee uint public constant AUTOMATIC_SERVICE_FEE = 333; // 0.3% Fee address public constant BOT_REGISTRY_ADDRESS = 0x637726f8b08a7ABE3aE3aCaB01A80E2d8ddeF77B; address public constant ETH_ADDR = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant AAVE_LENDING_POOL_ADDRESSES = 0x24a42fD28C976A61Df5D00D0599C34c4f90748c8; uint public constant NINETY_NINE_PERCENT_WEI = 990000000000000000; uint16 public constant AAVE_REFERRAL_CODE = 64; /// @param _collateralAddress underlying token address /// @param _user users address function getMaxCollateral(address _collateralAddress, address _user) public view returns (uint256) { address lendingPoolAddressDataProvider = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolDataProvider(); address lendingPoolCoreAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); uint256 pow10 = 10 ** (18 - _getDecimals(_collateralAddress)); // fetch all needed data (,uint256 totalCollateralETH, uint256 totalBorrowsETH,,uint256 currentLTV,,,) = ILendingPool(lendingPoolAddressDataProvider).calculateUserGlobalData(_user); (,uint256 tokenLTV,,) = ILendingPool(lendingPoolCoreAddress).getReserveConfiguration(_collateralAddress); uint256 collateralPrice = IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_collateralAddress); uint256 userTokenBalance = ILendingPool(lendingPoolCoreAddress).getUserUnderlyingAssetBalance(_collateralAddress, _user); uint256 userTokenBalanceEth = wmul(userTokenBalance * pow10, collateralPrice); // if borrow is 0, return whole user balance if (totalBorrowsETH == 0) { return userTokenBalance; } uint256 maxCollateralEth = div(sub(mul(currentLTV, totalCollateralETH), mul(totalBorrowsETH, 100)), currentLTV); /// @dev final amount can't be higher than users token balance maxCollateralEth = maxCollateralEth > userTokenBalanceEth ? userTokenBalanceEth : maxCollateralEth; // might happen due to wmul precision if (maxCollateralEth >= totalCollateralETH) { return wdiv(totalCollateralETH, collateralPrice) / pow10; } // get sum of all other reserves multiplied with their liquidation thresholds by reversing formula uint256 a = sub(wmul(currentLTV, totalCollateralETH), wmul(tokenLTV, userTokenBalanceEth)); // add new collateral amount multiplied by its threshold, and then divide with new total collateral uint256 newLiquidationThreshold = wdiv(add(a, wmul(sub(userTokenBalanceEth, maxCollateralEth), tokenLTV)), sub(totalCollateralETH, maxCollateralEth)); // if new threshold is lower than first one, calculate new max collateral with newLiquidationThreshold if (newLiquidationThreshold < currentLTV) { maxCollateralEth = div(sub(mul(newLiquidationThreshold, totalCollateralETH), mul(totalBorrowsETH, 100)), newLiquidationThreshold); maxCollateralEth = maxCollateralEth > userTokenBalanceEth ? userTokenBalanceEth : maxCollateralEth; } return wmul(wdiv(maxCollateralEth, collateralPrice) / pow10, NINETY_NINE_PERCENT_WEI); } /// @param _borrowAddress underlying token address /// @param _user users address function getMaxBorrow(address _borrowAddress, address _user) public view returns (uint256) { address lendingPoolAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); (,,,,uint256 availableBorrowsETH,,,) = ILendingPool(lendingPoolAddress).getUserAccountData(_user); uint256 borrowPrice = IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_borrowAddress); return wmul(wdiv(availableBorrowsETH, borrowPrice) / (10 ** (18 - _getDecimals(_borrowAddress))), NINETY_NINE_PERCENT_WEI); } function getMaxBoost(address _borrowAddress, address _collateralAddress, address _user) public view returns (uint256) { address lendingPoolAddressDataProvider = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolDataProvider(); address lendingPoolCoreAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); (,uint256 totalCollateralETH, uint256 totalBorrowsETH,,uint256 currentLTV,,,) = ILendingPool(lendingPoolAddressDataProvider).calculateUserGlobalData(_user); (,uint256 tokenLTV,,) = ILendingPool(lendingPoolCoreAddress).getReserveConfiguration(_collateralAddress); totalCollateralETH = div(mul(totalCollateralETH, currentLTV), 100); uint256 availableBorrowsETH = wmul(mul(div(sub(totalCollateralETH, totalBorrowsETH), sub(100, tokenLTV)), 100), NINETY_NINE_PERCENT_WEI); uint256 borrowPrice = IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_borrowAddress); return wdiv(availableBorrowsETH, borrowPrice) / (10 ** (18 - _getDecimals(_borrowAddress))); } /// @notice Calculates the fee amount /// @param _amount Amount that is converted /// @param _user Actuall user addr not DSProxy /// @param _gasCost Ether amount of gas we are spending for tx /// @param _tokenAddr token addr. of token we are getting for the fee /// @return feeAmount The amount we took for the fee function getFee(uint _amount, address _user, uint _gasCost, address _tokenAddr) internal returns (uint feeAmount) { address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); uint fee = MANUAL_SERVICE_FEE; if (BotRegistry(BOT_REGISTRY_ADDRESS).botList(tx.origin)) { fee = AUTOMATIC_SERVICE_FEE; } if (Discount(DISCOUNT_ADDR).isCustomFeeSet(_user)) { fee = Discount(DISCOUNT_ADDR).getCustomServiceFee(_user); } feeAmount = (fee == 0) ? 0 : (_amount / fee); if (_gasCost != 0) { uint256 price = IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_tokenAddr); _gasCost = wdiv(_gasCost, price) / (10 ** (18 - _getDecimals(_tokenAddr))); feeAmount = add(feeAmount, _gasCost); } // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } if (_tokenAddr == ETH_ADDR) { WALLET_ADDR.transfer(feeAmount); } else { ERC20(_tokenAddr).safeTransfer(WALLET_ADDR, feeAmount); } } /// @notice Calculates the gas cost for transaction /// @param _amount Amount that is converted /// @param _user Actuall user addr not DSProxy /// @param _gasCost Ether amount of gas we are spending for tx /// @param _tokenAddr token addr. of token we are getting for the fee /// @return gasCost The amount we took for the gas cost function getGasCost(uint _amount, address _user, uint _gasCost, address _tokenAddr) internal returns (uint gasCost) { address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); if (_gasCost != 0) { uint256 price = IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_tokenAddr); _gasCost = wmul(_gasCost, price); gasCost = _gasCost; } // fee can't go over 20% of the whole amount if (gasCost > (_amount / 5)) { gasCost = _amount / 5; } if (_tokenAddr == ETH_ADDR) { WALLET_ADDR.transfer(gasCost); } else { ERC20(_tokenAddr).safeTransfer(WALLET_ADDR, gasCost); } } /// @notice Returns the owner of the DSProxy that called the contract function getUserAddress() internal view returns (address) { DSProxy proxy = DSProxy(payable(address(this))); return proxy.owner(); } /// @notice Approves token contract to pull underlying tokens from the DSProxy /// @param _tokenAddr Token we are trying to approve /// @param _caller Address which will gain the approval function approveToken(address _tokenAddr, address _caller) internal { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeApprove(_caller, uint256(-1)); } } /// @notice Send specific amount from contract to specific user /// @param _token Token we are trying to send /// @param _user User that should receive funds /// @param _amount Amount that should be sent function sendContractBalance(address _token, address _user, uint _amount) public { if (_amount == 0) return; if (_token == ETH_ADDR) { payable(_user).transfer(_amount); } else { ERC20(_token).safeTransfer(_user, _amount); } } function sendFullContractBalance(address _token, address _user) public { if (_token == ETH_ADDR) { sendContractBalance(_token, _user, address(this).balance); } else { sendContractBalance(_token, _user, ERC20(_token).balanceOf(address(this))); } } function _getDecimals(address _token) internal view returns (uint256) { if (_token == ETH_ADDR) return 18; return ERC20(_token).decimals(); } } contract AaveSafetyRatio is AaveHelper { function getSafetyRatio(address _user) public view returns(uint256) { address lendingPoolAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); (,,uint256 totalBorrowsETH,,uint256 availableBorrowsETH,,,) = ILendingPool(lendingPoolAddress).getUserAccountData(_user); if (totalBorrowsETH == 0) return uint256(0); return wdiv(add(totalBorrowsETH, availableBorrowsETH), totalBorrowsETH); } } contract AdminAuth { using SafeERC20 for ERC20; address public owner; address public admin; modifier onlyOwner() { require(owner == msg.sender); _; } constructor() public { owner = msg.sender; } /// @notice Admin is set by owner first time, after that admin is super role and has permission to change owner /// @param _admin Address of multisig that becomes admin function setAdminByOwner(address _admin) public { require(msg.sender == owner); require(admin == address(0)); admin = _admin; } /// @notice Admin is able to set new admin /// @param _admin Address of multisig that becomes new admin function setAdminByAdmin(address _admin) public { require(msg.sender == admin); admin = _admin; } /// @notice Admin is able to change owner /// @param _owner Address of new owner function setOwnerByAdmin(address _owner) public { require(msg.sender == admin); owner = _owner; } /// @notice Destroy the contract function kill() public onlyOwner { selfdestruct(payable(owner)); } /// @notice withdraw stuck funds function withdrawStuckFunds(address _token, uint _amount) public onlyOwner { if (_token == 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE) { payable(owner).transfer(_amount); } else { ERC20(_token).safeTransfer(owner, _amount); } } } contract Auth is AdminAuth { bool public ALL_AUTHORIZED = false; mapping(address => bool) public authorized; modifier onlyAuthorized() { require(ALL_AUTHORIZED || authorized[msg.sender]); _; } constructor() public { authorized[msg.sender] = true; } function setAuthorized(address _user, bool _approved) public onlyOwner { authorized[_user] = _approved; } function setAllAuthorized(bool _authorized) public onlyOwner { ALL_AUTHORIZED = _authorized; } } contract ProxyPermission { address public constant FACTORY_ADDRESS = 0x5a15566417e6C1c9546523066500bDDBc53F88C7; /// @notice Called in the context of DSProxy to authorize an address /// @param _contractAddr Address which will be authorized function givePermission(address _contractAddr) public { address currAuthority = address(DSAuth(address(this)).authority()); DSGuard guard = DSGuard(currAuthority); if (currAuthority == address(0)) { guard = DSGuardFactory(FACTORY_ADDRESS).newGuard(); DSAuth(address(this)).setAuthority(DSAuthority(address(guard))); } guard.permit(_contractAddr, address(this), bytes4(keccak256("execute(address,bytes)"))); } /// @notice Called in the context of DSProxy to remove authority of an address /// @param _contractAddr Auth address which will be removed from authority list function removePermission(address _contractAddr) public { address currAuthority = address(DSAuth(address(this)).authority()); // if there is no authority, that means that contract doesn't have permission if (currAuthority == address(0)) { return; } DSGuard guard = DSGuard(currAuthority); guard.forbid(_contractAddr, address(this), bytes4(keccak256("execute(address,bytes)"))); } function proxyOwner() internal returns(address) { return DSAuth(address(this)).owner(); } } contract CompoundMonitorProxy is AdminAuth { using SafeERC20 for ERC20; uint public CHANGE_PERIOD; address public monitor; address public newMonitor; address public lastMonitor; uint public changeRequestedTimestamp; mapping(address => bool) public allowed; event MonitorChangeInitiated(address oldMonitor, address newMonitor); event MonitorChangeCanceled(); event MonitorChangeFinished(address monitor); event MonitorChangeReverted(address monitor); // if someone who is allowed become malicious, owner can't be changed modifier onlyAllowed() { require(allowed[msg.sender] || msg.sender == owner); _; } modifier onlyMonitor() { require (msg.sender == monitor); _; } constructor(uint _changePeriod) public { CHANGE_PERIOD = _changePeriod * 1 days; } /// @notice Only monitor contract is able to call execute on users proxy /// @param _owner Address of cdp owner (users DSProxy address) /// @param _compoundSaverProxy Address of CompoundSaverProxy /// @param _data Data to send to CompoundSaverProxy function callExecute(address _owner, address _compoundSaverProxy, bytes memory _data) public payable onlyMonitor { // execute reverts if calling specific method fails DSProxyInterface(_owner).execute{value: msg.value}(_compoundSaverProxy, _data); // return if anything left if (address(this).balance > 0) { msg.sender.transfer(address(this).balance); } } /// @notice Allowed users are able to set Monitor contract without any waiting period first time /// @param _monitor Address of Monitor contract function setMonitor(address _monitor) public onlyAllowed { require(monitor == address(0)); monitor = _monitor; } /// @notice Allowed users are able to start procedure for changing monitor /// @dev after CHANGE_PERIOD needs to call confirmNewMonitor to actually make a change /// @param _newMonitor address of new monitor function changeMonitor(address _newMonitor) public onlyAllowed { require(changeRequestedTimestamp == 0); changeRequestedTimestamp = now; lastMonitor = monitor; newMonitor = _newMonitor; emit MonitorChangeInitiated(lastMonitor, newMonitor); } /// @notice At any point allowed users are able to cancel monitor change function cancelMonitorChange() public onlyAllowed { require(changeRequestedTimestamp > 0); changeRequestedTimestamp = 0; newMonitor = address(0); emit MonitorChangeCanceled(); } /// @notice Anyone is able to confirm new monitor after CHANGE_PERIOD if process is started function confirmNewMonitor() public onlyAllowed { require((changeRequestedTimestamp + CHANGE_PERIOD) < now); require(changeRequestedTimestamp != 0); require(newMonitor != address(0)); monitor = newMonitor; newMonitor = address(0); changeRequestedTimestamp = 0; emit MonitorChangeFinished(monitor); } /// @notice Its possible to revert monitor to last used monitor function revertMonitor() public onlyAllowed { require(lastMonitor != address(0)); monitor = lastMonitor; emit MonitorChangeReverted(monitor); } /// @notice Allowed users are able to add new allowed user /// @param _user Address of user that will be allowed function addAllowed(address _user) public onlyAllowed { allowed[_user] = true; } /// @notice Allowed users are able to remove allowed user /// @dev owner is always allowed even if someone tries to remove it from allowed mapping /// @param _user Address of allowed user function removeAllowed(address _user) public onlyAllowed { allowed[_user] = false; } function setChangePeriod(uint _periodInDays) public onlyAllowed { require(_periodInDays * 1 days > CHANGE_PERIOD); CHANGE_PERIOD = _periodInDays * 1 days; } /// @notice In case something is left in contract, owner is able to withdraw it /// @param _token address of token to withdraw balance function withdrawToken(address _token) public onlyOwner { uint balance = ERC20(_token).balanceOf(address(this)); ERC20(_token).safeTransfer(msg.sender, balance); } /// @notice In case something is left in contract, owner is able to withdraw it function withdrawEth() public onlyOwner { uint balance = address(this).balance; msg.sender.transfer(balance); } } contract CompoundSubscriptions is AdminAuth { struct CompoundHolder { address user; uint128 minRatio; uint128 maxRatio; uint128 optimalRatioBoost; uint128 optimalRatioRepay; bool boostEnabled; } struct SubPosition { uint arrPos; bool subscribed; } CompoundHolder[] public subscribers; mapping (address => SubPosition) public subscribersPos; uint public changeIndex; event Subscribed(address indexed user); event Unsubscribed(address indexed user); event Updated(address indexed user); event ParamUpdates(address indexed user, uint128, uint128, uint128, uint128, bool); /// @dev Called by the DSProxy contract which owns the Compound position /// @notice Adds the users Compound poistion in the list of subscriptions so it can be monitored /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalBoost Ratio amount which boost should target /// @param _optimalRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled function subscribe(uint128 _minRatio, uint128 _maxRatio, uint128 _optimalBoost, uint128 _optimalRepay, bool _boostEnabled) external { // if boost is not enabled, set max ratio to max uint uint128 localMaxRatio = _boostEnabled ? _maxRatio : uint128(-1); require(checkParams(_minRatio, localMaxRatio), "Must be correct params"); SubPosition storage subInfo = subscribersPos[msg.sender]; CompoundHolder memory subscription = CompoundHolder({ minRatio: _minRatio, maxRatio: localMaxRatio, optimalRatioBoost: _optimalBoost, optimalRatioRepay: _optimalRepay, user: msg.sender, boostEnabled: _boostEnabled }); changeIndex++; if (subInfo.subscribed) { subscribers[subInfo.arrPos] = subscription; emit Updated(msg.sender); emit ParamUpdates(msg.sender, _minRatio, localMaxRatio, _optimalBoost, _optimalRepay, _boostEnabled); } else { subscribers.push(subscription); subInfo.arrPos = subscribers.length - 1; subInfo.subscribed = true; emit Subscribed(msg.sender); } } /// @notice Called by the users DSProxy /// @dev Owner who subscribed cancels his subscription function unsubscribe() external { _unsubscribe(msg.sender); } /// @dev Checks limit if minRatio is bigger than max /// @param _minRatio Minimum ratio, bellow which repay can be triggered /// @param _maxRatio Maximum ratio, over which boost can be triggered /// @return Returns bool if the params are correct function checkParams(uint128 _minRatio, uint128 _maxRatio) internal pure returns (bool) { if (_minRatio > _maxRatio) { return false; } return true; } /// @dev Internal method to remove a subscriber from the list /// @param _user The actual address that owns the Compound position function _unsubscribe(address _user) internal { require(subscribers.length > 0, "Must have subscribers in the list"); SubPosition storage subInfo = subscribersPos[_user]; require(subInfo.subscribed, "Must first be subscribed"); address lastOwner = subscribers[subscribers.length - 1].user; SubPosition storage subInfo2 = subscribersPos[lastOwner]; subInfo2.arrPos = subInfo.arrPos; subscribers[subInfo.arrPos] = subscribers[subscribers.length - 1]; subscribers.pop(); // remove last element and reduce arr length changeIndex++; subInfo.subscribed = false; subInfo.arrPos = 0; emit Unsubscribed(msg.sender); } /// @dev Checks if the user is subscribed /// @param _user The actual address that owns the Compound position /// @return If the user is subscribed function isSubscribed(address _user) public view returns (bool) { SubPosition storage subInfo = subscribersPos[_user]; return subInfo.subscribed; } /// @dev Returns subscribtion information about a user /// @param _user The actual address that owns the Compound position /// @return Subscription information about the user if exists function getHolder(address _user) public view returns (CompoundHolder memory) { SubPosition storage subInfo = subscribersPos[_user]; return subscribers[subInfo.arrPos]; } /// @notice Helper method to return all the subscribed CDPs /// @return List of all subscribers function getSubscribers() public view returns (CompoundHolder[] memory) { return subscribers; } /// @notice Helper method for the frontend, returns all the subscribed CDPs paginated /// @param _page What page of subscribers you want /// @param _perPage Number of entries per page /// @return List of all subscribers for that page function getSubscribersByPage(uint _page, uint _perPage) public view returns (CompoundHolder[] memory) { CompoundHolder[] memory holders = new CompoundHolder[](_perPage); uint start = _page * _perPage; uint end = start + _perPage; end = (end > holders.length) ? holders.length : end; uint count = 0; for (uint i = start; i < end; i++) { holders[count] = subscribers[i]; count++; } return holders; } ////////////// ADMIN METHODS /////////////////// /// @notice Admin function to unsubscribe a CDP /// @param _user The actual address that owns the Compound position function unsubscribeByAdmin(address _user) public onlyOwner { SubPosition storage subInfo = subscribersPos[_user]; if (subInfo.subscribed) { _unsubscribe(_user); } } } contract CompoundSubscriptionsProxy is ProxyPermission { address public constant COMPOUND_SUBSCRIPTION_ADDRESS = 0x52015EFFD577E08f498a0CCc11905925D58D6207; address public constant COMPOUND_MONITOR_PROXY = 0xB1cF8DE8e791E4Ed1Bd86c03E2fc1f14389Cb10a; /// @notice Calls subscription contract and creates a DSGuard if non existent /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalRatioBoost Ratio amount which boost should target /// @param _optimalRatioRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled function subscribe( uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled ) public { givePermission(COMPOUND_MONITOR_PROXY); ICompoundSubscription(COMPOUND_SUBSCRIPTION_ADDRESS).subscribe( _minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled); } /// @notice Calls subscription contract and updated existing parameters /// @dev If subscription is non existent this will create one /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalRatioBoost Ratio amount which boost should target /// @param _optimalRatioRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled function update( uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled ) public { ICompoundSubscription(COMPOUND_SUBSCRIPTION_ADDRESS).subscribe(_minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled); } /// @notice Calls the subscription contract to unsubscribe the caller function unsubscribe() public { removePermission(COMPOUND_MONITOR_PROXY); ICompoundSubscription(COMPOUND_SUBSCRIPTION_ADDRESS).unsubscribe(); } } contract CompoundCreateTaker is ProxyPermission { using SafeERC20 for ERC20; address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); // solhint-disable-next-line const-name-snakecase DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); struct CreateInfo { address cCollAddress; address cBorrowAddress; uint depositAmount; } /// @notice Main function which will take a FL and open a leverage position /// @dev Call through DSProxy, if _exchangeData.destAddr is a token approve DSProxy /// @param _createInfo [cCollAddress, cBorrowAddress, depositAmount] /// @param _exchangeData Exchange data struct function openLeveragedLoan( CreateInfo memory _createInfo, SaverExchangeCore.ExchangeData memory _exchangeData, address payable _compReceiver ) public payable { uint loanAmount = _exchangeData.srcAmount; // Pull tokens from user if (_exchangeData.destAddr != ETH_ADDRESS) { ERC20(_exchangeData.destAddr).safeTransferFrom(msg.sender, address(this), _createInfo.depositAmount); } else { require(msg.value >= _createInfo.depositAmount, "Must send correct amount of eth"); } // Send tokens to FL receiver sendDeposit(_compReceiver, _exchangeData.destAddr); // Pack the struct data (uint[4] memory numData, address[6] memory cAddresses, bytes memory callData) = _packData(_createInfo, _exchangeData); bytes memory paramsData = abi.encode(numData, cAddresses, callData, address(this)); givePermission(_compReceiver); lendingPool.flashLoan(_compReceiver, _exchangeData.srcAddr, loanAmount, paramsData); removePermission(_compReceiver); logger.Log(address(this), msg.sender, "CompoundLeveragedLoan", abi.encode(_exchangeData.srcAddr, _exchangeData.destAddr, _exchangeData.srcAmount, _exchangeData.destAmount)); } function sendDeposit(address payable _compoundReceiver, address _token) internal { if (_token != ETH_ADDRESS) { ERC20(_token).safeTransfer(_compoundReceiver, ERC20(_token).balanceOf(address(this))); } _compoundReceiver.transfer(address(this).balance); } function _packData( CreateInfo memory _createInfo, SaverExchangeCore.ExchangeData memory exchangeData ) internal pure returns (uint[4] memory numData, address[6] memory cAddresses, bytes memory callData) { numData = [ exchangeData.srcAmount, exchangeData.destAmount, exchangeData.minPrice, exchangeData.price0x ]; cAddresses = [ _createInfo.cCollAddress, _createInfo.cBorrowAddress, exchangeData.srcAddr, exchangeData.destAddr, exchangeData.exchangeAddr, exchangeData.wrapper ]; callData = exchangeData.callData; } } contract CarefulMath { /** * @dev Possible error codes that we can return */ enum MathError { NO_ERROR, DIVISION_BY_ZERO, INTEGER_OVERFLOW, INTEGER_UNDERFLOW } /** * @dev Multiplies two numbers, returns an error on overflow. */ function mulUInt(uint a, uint b) internal pure returns (MathError, uint) { if (a == 0) { return (MathError.NO_ERROR, 0); } uint c = a * b; if (c / a != b) { return (MathError.INTEGER_OVERFLOW, 0); } else { return (MathError.NO_ERROR, c); } } /** * @dev Integer division of two numbers, truncating the quotient. */ function divUInt(uint a, uint b) internal pure returns (MathError, uint) { if (b == 0) { return (MathError.DIVISION_BY_ZERO, 0); } return (MathError.NO_ERROR, a / b); } /** * @dev Subtracts two numbers, returns an error on overflow (i.e. if subtrahend is greater than minuend). */ function subUInt(uint a, uint b) internal pure returns (MathError, uint) { if (b <= a) { return (MathError.NO_ERROR, a - b); } else { return (MathError.INTEGER_UNDERFLOW, 0); } } /** * @dev Adds two numbers, returns an error on overflow. */ function addUInt(uint a, uint b) internal pure returns (MathError, uint) { uint c = a + b; if (c >= a) { return (MathError.NO_ERROR, c); } else { return (MathError.INTEGER_OVERFLOW, 0); } } /** * @dev add a and b and then subtract c */ function addThenSubUInt(uint a, uint b, uint c) internal pure returns (MathError, uint) { (MathError err0, uint sum) = addUInt(a, b); if (err0 != MathError.NO_ERROR) { return (err0, 0); } return subUInt(sum, c); } } contract Exponential is CarefulMath { uint constant expScale = 1e18; uint constant doubleScale = 1e36; uint constant halfExpScale = expScale/2; uint constant mantissaOne = expScale; struct Exp { uint mantissa; } struct Double { uint mantissa; } /** * @dev Creates an exponential from numerator and denominator values. * Note: Returns an error if (`num` * 10e18) > MAX_INT, * or if `denom` is zero. */ function getExp(uint num, uint denom) pure internal returns (MathError, Exp memory) { (MathError err0, uint scaledNumerator) = mulUInt(num, expScale); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } (MathError err1, uint rational) = divUInt(scaledNumerator, denom); if (err1 != MathError.NO_ERROR) { return (err1, Exp({mantissa: 0})); } return (MathError.NO_ERROR, Exp({mantissa: rational})); } /** * @dev Adds two exponentials, returning a new exponential. */ function addExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) { (MathError error, uint result) = addUInt(a.mantissa, b.mantissa); return (error, Exp({mantissa: result})); } /** * @dev Subtracts two exponentials, returning a new exponential. */ function subExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) { (MathError error, uint result) = subUInt(a.mantissa, b.mantissa); return (error, Exp({mantissa: result})); } /** * @dev Multiply an Exp by a scalar, returning a new Exp. */ function mulScalar(Exp memory a, uint scalar) pure internal returns (MathError, Exp memory) { (MathError err0, uint scaledMantissa) = mulUInt(a.mantissa, scalar); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } return (MathError.NO_ERROR, Exp({mantissa: scaledMantissa})); } /** * @dev Multiply an Exp by a scalar, then truncate to return an unsigned integer. */ function mulScalarTruncate(Exp memory a, uint scalar) pure internal returns (MathError, uint) { (MathError err, Exp memory product) = mulScalar(a, scalar); if (err != MathError.NO_ERROR) { return (err, 0); } return (MathError.NO_ERROR, truncate(product)); } /** * @dev Multiply an Exp by a scalar, truncate, then add an to an unsigned integer, returning an unsigned integer. */ function mulScalarTruncateAddUInt(Exp memory a, uint scalar, uint addend) pure internal returns (MathError, uint) { (MathError err, Exp memory product) = mulScalar(a, scalar); if (err != MathError.NO_ERROR) { return (err, 0); } return addUInt(truncate(product), addend); } /** * @dev Divide an Exp by a scalar, returning a new Exp. */ function divScalar(Exp memory a, uint scalar) pure internal returns (MathError, Exp memory) { (MathError err0, uint descaledMantissa) = divUInt(a.mantissa, scalar); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } return (MathError.NO_ERROR, Exp({mantissa: descaledMantissa})); } /** * @dev Divide a scalar by an Exp, returning a new Exp. */ function divScalarByExp(uint scalar, Exp memory divisor) pure internal returns (MathError, Exp memory) { /* We are doing this as: getExp(mulUInt(expScale, scalar), divisor.mantissa) How it works: Exp = a / b; Scalar = s; `s / (a / b)` = `b * s / a` and since for an Exp `a = mantissa, b = expScale` */ (MathError err0, uint numerator) = mulUInt(expScale, scalar); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } return getExp(numerator, divisor.mantissa); } /** * @dev Divide a scalar by an Exp, then truncate to return an unsigned integer. */ function divScalarByExpTruncate(uint scalar, Exp memory divisor) pure internal returns (MathError, uint) { (MathError err, Exp memory fraction) = divScalarByExp(scalar, divisor); if (err != MathError.NO_ERROR) { return (err, 0); } return (MathError.NO_ERROR, truncate(fraction)); } /** * @dev Multiplies two exponentials, returning a new exponential. */ function mulExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) { (MathError err0, uint doubleScaledProduct) = mulUInt(a.mantissa, b.mantissa); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } // We add half the scale before dividing so that we get rounding instead of truncation. // See "Listing 6" and text above it at https://accu.org/index.php/journals/1717 // Without this change, a result like 6.6...e-19 will be truncated to 0 instead of being rounded to 1e-18. (MathError err1, uint doubleScaledProductWithHalfScale) = addUInt(halfExpScale, doubleScaledProduct); if (err1 != MathError.NO_ERROR) { return (err1, Exp({mantissa: 0})); } (MathError err2, uint product) = divUInt(doubleScaledProductWithHalfScale, expScale); // The only error `div` can return is MathError.DIVISION_BY_ZERO but we control `expScale` and it is not zero. assert(err2 == MathError.NO_ERROR); return (MathError.NO_ERROR, Exp({mantissa: product})); } /** * @dev Multiplies two exponentials given their mantissas, returning a new exponential. */ function mulExp(uint a, uint b) pure internal returns (MathError, Exp memory) { return mulExp(Exp({mantissa: a}), Exp({mantissa: b})); } /** * @dev Multiplies three exponentials, returning a new exponential. */ function mulExp3(Exp memory a, Exp memory b, Exp memory c) pure internal returns (MathError, Exp memory) { (MathError err, Exp memory ab) = mulExp(a, b); if (err != MathError.NO_ERROR) { return (err, ab); } return mulExp(ab, c); } /** * @dev Divides two exponentials, returning a new exponential. * (a/scale) / (b/scale) = (a/scale) * (scale/b) = a/b, * which we can scale as an Exp by calling getExp(a.mantissa, b.mantissa) */ function divExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) { return getExp(a.mantissa, b.mantissa); } /** * @dev Truncates the given exp to a whole number value. * For example, truncate(Exp{mantissa: 15 * expScale}) = 15 */ function truncate(Exp memory exp) pure internal returns (uint) { // Note: We are not using careful math here as we're performing a division that cannot fail return exp.mantissa / expScale; } /** * @dev Checks if first Exp is less than second Exp. */ function lessThanExp(Exp memory left, Exp memory right) pure internal returns (bool) { return left.mantissa < right.mantissa; } /** * @dev Checks if left Exp <= right Exp. */ function lessThanOrEqualExp(Exp memory left, Exp memory right) pure internal returns (bool) { return left.mantissa <= right.mantissa; } /** * @dev Checks if left Exp > right Exp. */ function greaterThanExp(Exp memory left, Exp memory right) pure internal returns (bool) { return left.mantissa > right.mantissa; } /** * @dev returns true if Exp is exactly zero */ function isZeroExp(Exp memory value) pure internal returns (bool) { return value.mantissa == 0; } function sub_(Exp memory a, Exp memory b) pure internal returns (Exp memory) { return Exp({mantissa: sub_(a.mantissa, b.mantissa)}); } function sub_(Double memory a, Double memory b) pure internal returns (Double memory) { return Double({mantissa: sub_(a.mantissa, b.mantissa)}); } function sub_(uint a, uint b) pure internal returns (uint) { return sub_(a, b, "subtraction underflow"); } function sub_(uint a, uint b, string memory errorMessage) pure internal returns (uint) { require(b <= a, errorMessage); return a - b; } function mul_(Exp memory a, Exp memory b) pure internal returns (Exp memory) { return Exp({mantissa: mul_(a.mantissa, b.mantissa) / expScale}); } function mul_(Exp memory a, uint b) pure internal returns (Exp memory) { return Exp({mantissa: mul_(a.mantissa, b)}); } function mul_(uint a, Exp memory b) pure internal returns (uint) { return mul_(a, b.mantissa) / expScale; } function mul_(Double memory a, Double memory b) pure internal returns (Double memory) { return Double({mantissa: mul_(a.mantissa, b.mantissa) / doubleScale}); } function mul_(Double memory a, uint b) pure internal returns (Double memory) { return Double({mantissa: mul_(a.mantissa, b)}); } function mul_(uint a, Double memory b) pure internal returns (uint) { return mul_(a, b.mantissa) / doubleScale; } function mul_(uint a, uint b) pure internal returns (uint) { return mul_(a, b, "multiplication overflow"); } function mul_(uint a, uint b, string memory errorMessage) pure internal returns (uint) { if (a == 0 || b == 0) { return 0; } uint c = a * b; require(c / a == b, errorMessage); return c; } function div_(Exp memory a, Exp memory b) pure internal returns (Exp memory) { return Exp({mantissa: div_(mul_(a.mantissa, expScale), b.mantissa)}); } function div_(Exp memory a, uint b) pure internal returns (Exp memory) { return Exp({mantissa: div_(a.mantissa, b)}); } function div_(uint a, Exp memory b) pure internal returns (uint) { return div_(mul_(a, expScale), b.mantissa); } function div_(Double memory a, Double memory b) pure internal returns (Double memory) { return Double({mantissa: div_(mul_(a.mantissa, doubleScale), b.mantissa)}); } function div_(Double memory a, uint b) pure internal returns (Double memory) { return Double({mantissa: div_(a.mantissa, b)}); } function div_(uint a, Double memory b) pure internal returns (uint) { return div_(mul_(a, doubleScale), b.mantissa); } function div_(uint a, uint b) pure internal returns (uint) { return div_(a, b, "divide by zero"); } function div_(uint a, uint b, string memory errorMessage) pure internal returns (uint) { require(b > 0, errorMessage); return a / b; } function add_(Exp memory a, Exp memory b) pure internal returns (Exp memory) { return Exp({mantissa: add_(a.mantissa, b.mantissa)}); } function add_(Double memory a, Double memory b) pure internal returns (Double memory) { return Double({mantissa: add_(a.mantissa, b.mantissa)}); } function add_(uint a, uint b) pure internal returns (uint) { return add_(a, b, "addition overflow"); } function add_(uint a, uint b, string memory errorMessage) pure internal returns (uint) { uint c = a + b; require(c >= a, errorMessage); return c; } } contract CompoundBorrowProxy { using SafeERC20 for ERC20; address public constant ETH_ADDR = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant COMPTROLLER_ADDR = 0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B; function borrow(address _cCollToken, address _cBorrowToken, address _borrowToken, uint _amount) public { address[] memory markets = new address[](2); markets[0] = _cCollToken; markets[1] = _cBorrowToken; ComptrollerInterface(COMPTROLLER_ADDR).enterMarkets(markets); require(CTokenInterface(_cBorrowToken).borrow(_amount) == 0); // withdraw funds to msg.sender if (_borrowToken != ETH_ADDR) { ERC20(_borrowToken).safeTransfer(msg.sender, ERC20(_borrowToken).balanceOf(address(this))); } else { msg.sender.transfer(address(this).balance); } } } contract CreamSafetyRatio is Exponential, DSMath { // solhint-disable-next-line const-name-snakecase ComptrollerInterface public constant comp = ComptrollerInterface(0x3d5BC3c8d13dcB8bF317092d84783c2697AE9258); /// @notice Calcualted the ratio of debt / adjusted collateral /// @param _user Address of the user function getSafetyRatio(address _user) public view returns (uint) { // For each asset the account is in address[] memory assets = comp.getAssetsIn(_user); address oracleAddr = comp.oracle(); uint sumCollateral = 0; uint sumBorrow = 0; for (uint i = 0; i < assets.length; i++) { address asset = assets[i]; (, uint cTokenBalance, uint borrowBalance, uint exchangeRateMantissa) = CTokenInterface(asset).getAccountSnapshot(_user); Exp memory oraclePrice; if (cTokenBalance != 0 || borrowBalance != 0) { oraclePrice = Exp({mantissa: CompoundOracleInterface(oracleAddr).getUnderlyingPrice(asset)}); } // Sum up collateral in Eth if (cTokenBalance != 0) { (, uint collFactorMantissa) = comp.markets(address(asset)); Exp memory collateralFactor = Exp({mantissa: collFactorMantissa}); Exp memory exchangeRate = Exp({mantissa: exchangeRateMantissa}); (, Exp memory tokensToEther) = mulExp3(collateralFactor, exchangeRate, oraclePrice); (, sumCollateral) = mulScalarTruncateAddUInt(tokensToEther, cTokenBalance, sumCollateral); } // Sum up debt in Eth if (borrowBalance != 0) { (, sumBorrow) = mulScalarTruncateAddUInt(oraclePrice, borrowBalance, sumBorrow); } } if (sumBorrow == 0) return uint(-1); uint borrowPowerUsed = (sumBorrow * 10**18) / sumCollateral; return wdiv(1e18, borrowPowerUsed); } } contract CreamSaverHelper is DSMath, Exponential { using SafeERC20 for ERC20; address payable public constant WALLET_ADDR = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; address public constant DISCOUNT_ADDR = 0x1b14E8D511c9A4395425314f849bD737BAF8208F; uint public constant MANUAL_SERVICE_FEE = 400; // 0.25% Fee uint public constant AUTOMATIC_SERVICE_FEE = 333; // 0.3% Fee address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant CETH_ADDRESS = 0xD06527D5e56A3495252A528C4987003b712860eE; address public constant COMPTROLLER = 0x3d5BC3c8d13dcB8bF317092d84783c2697AE9258; address public constant BOT_REGISTRY_ADDRESS = 0x637726f8b08a7ABE3aE3aCaB01A80E2d8ddeF77B; /// @notice Helper method to payback the cream debt /// @dev If amount is bigger it will repay the whole debt and send the extra to the _user /// @param _amount Amount of tokens we want to repay /// @param _cBorrowToken Ctoken address we are repaying /// @param _borrowToken Token address we are repaying /// @param _user Owner of the cream position we are paying back function paybackDebt(uint _amount, address _cBorrowToken, address _borrowToken, address payable _user) internal { uint wholeDebt = CTokenInterface(_cBorrowToken).borrowBalanceCurrent(address(this)); if (_amount > wholeDebt) { if (_borrowToken == ETH_ADDRESS) { _user.transfer((_amount - wholeDebt)); } else { ERC20(_borrowToken).safeTransfer(_user, (_amount - wholeDebt)); } _amount = wholeDebt; } approveCToken(_borrowToken, _cBorrowToken); if (_borrowToken == ETH_ADDRESS) { CEtherInterface(_cBorrowToken).repayBorrow{value: _amount}(); } else { require(CTokenInterface(_cBorrowToken).repayBorrow(_amount) == 0); } } /// @notice Calculates the fee amount /// @param _amount Amount that is converted /// @param _user Actuall user addr not DSProxy /// @param _gasCost Ether amount of gas we are spending for tx /// @param _cTokenAddr CToken addr. of token we are getting for the fee /// @return feeAmount The amount we took for the fee function getFee(uint _amount, address _user, uint _gasCost, address _cTokenAddr) internal returns (uint feeAmount) { uint fee = MANUAL_SERVICE_FEE; if (BotRegistry(BOT_REGISTRY_ADDRESS).botList(tx.origin)) { fee = AUTOMATIC_SERVICE_FEE; } address tokenAddr = getUnderlyingAddr(_cTokenAddr); if (Discount(DISCOUNT_ADDR).isCustomFeeSet(_user)) { fee = Discount(DISCOUNT_ADDR).getCustomServiceFee(_user); } feeAmount = (fee == 0) ? 0 : (_amount / fee); if (_gasCost != 0) { address oracle = ComptrollerInterface(COMPTROLLER).oracle(); uint ethTokenPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(_cTokenAddr); _gasCost = wdiv(_gasCost, ethTokenPrice); feeAmount = add(feeAmount, _gasCost); } // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } if (tokenAddr == ETH_ADDRESS) { WALLET_ADDR.transfer(feeAmount); } else { ERC20(tokenAddr).safeTransfer(WALLET_ADDR, feeAmount); } } /// @notice Calculates the gas cost of transaction and send it to wallet /// @param _amount Amount that is converted /// @param _gasCost Ether amount of gas we are spending for tx /// @param _cTokenAddr CToken addr. of token we are getting for the fee /// @return feeAmount The amount we took for the fee function getGasCost(uint _amount, uint _gasCost, address _cTokenAddr) internal returns (uint feeAmount) { address tokenAddr = getUnderlyingAddr(_cTokenAddr); if (_gasCost != 0) { address oracle = ComptrollerInterface(COMPTROLLER).oracle(); uint ethTokenPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(_cTokenAddr); feeAmount = wdiv(_gasCost, ethTokenPrice); } // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } if (tokenAddr == ETH_ADDRESS) { WALLET_ADDR.transfer(feeAmount); } else { ERC20(tokenAddr).safeTransfer(WALLET_ADDR, feeAmount); } } /// @notice Enters the market for the collatera and borrow tokens /// @param _cTokenAddrColl Collateral address we are entering the market in /// @param _cTokenAddrBorrow Borrow address we are entering the market in function enterMarket(address _cTokenAddrColl, address _cTokenAddrBorrow) internal { address[] memory markets = new address[](2); markets[0] = _cTokenAddrColl; markets[1] = _cTokenAddrBorrow; ComptrollerInterface(COMPTROLLER).enterMarkets(markets); } /// @notice Approves CToken contract to pull underlying tokens from the DSProxy /// @param _tokenAddr Token we are trying to approve /// @param _cTokenAddr Address which will gain the approval function approveCToken(address _tokenAddr, address _cTokenAddr) internal { if (_tokenAddr != ETH_ADDRESS) { ERC20(_tokenAddr).safeApprove(_cTokenAddr, uint(-1)); } } /// @notice Returns the underlying address of the cToken asset /// @param _cTokenAddress cToken address /// @return Token address of the cToken specified function getUnderlyingAddr(address _cTokenAddress) internal returns (address) { if (_cTokenAddress == CETH_ADDRESS) { return ETH_ADDRESS; } else { return CTokenInterface(_cTokenAddress).underlying(); } } /// @notice Returns the owner of the DSProxy that called the contract function getUserAddress() internal view returns (address) { DSProxy proxy = DSProxy(uint160(address(this))); return proxy.owner(); } /// @notice Returns the maximum amount of collateral available to withdraw /// @dev Due to rounding errors the result is - 1% wei from the exact amount /// @param _cCollAddress Collateral we are getting the max value of /// @param _account Users account /// @return Returns the max. collateral amount in that token function getMaxCollateral(address _cCollAddress, address _account) public returns (uint) { (, uint liquidityInEth, ) = ComptrollerInterface(COMPTROLLER).getAccountLiquidity(_account); uint usersBalance = CTokenInterface(_cCollAddress).balanceOfUnderlying(_account); address oracle = ComptrollerInterface(COMPTROLLER).oracle(); if (liquidityInEth == 0) return usersBalance; CTokenInterface(_cCollAddress).accrueInterest(); if (_cCollAddress == CETH_ADDRESS) { if (liquidityInEth > usersBalance) return usersBalance; return sub(liquidityInEth, (liquidityInEth / 100)); } uint ethPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(_cCollAddress); uint liquidityInToken = wdiv(liquidityInEth, ethPrice); if (liquidityInToken > usersBalance) return usersBalance; return sub(liquidityInToken, (liquidityInToken / 100)); // cut off 1% due to rounding issues } /// @notice Returns the maximum amount of borrow amount available /// @dev Due to rounding errors the result is - 1% wei from the exact amount /// @param _cBorrowAddress Borrow token we are getting the max value of /// @param _account Users account /// @return Returns the max. borrow amount in that token function getMaxBorrow(address _cBorrowAddress, address _account) public returns (uint) { (, uint liquidityInEth, ) = ComptrollerInterface(COMPTROLLER).getAccountLiquidity(_account); address oracle = ComptrollerInterface(COMPTROLLER).oracle(); CTokenInterface(_cBorrowAddress).accrueInterest(); if (_cBorrowAddress == CETH_ADDRESS) return sub(liquidityInEth, (liquidityInEth / 100)); uint ethPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(_cBorrowAddress); uint liquidityInToken = wdiv(liquidityInEth, ethPrice); return sub(liquidityInToken, (liquidityInToken / 100)); // cut off 1% due to rounding issues } } contract CreamBorrowProxy { using SafeERC20 for ERC20; address public constant ETH_ADDR = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant COMPTROLLER_ADDR = 0x3d5BC3c8d13dcB8bF317092d84783c2697AE9258; function borrow(address _cCollToken, address _cBorrowToken, address _borrowToken, uint _amount) public { address[] memory markets = new address[](2); markets[0] = _cCollToken; markets[1] = _cBorrowToken; ComptrollerInterface(COMPTROLLER_ADDR).enterMarkets(markets); require(CTokenInterface(_cBorrowToken).borrow(_amount) == 0); // withdraw funds to msg.sender if (_borrowToken != ETH_ADDR) { ERC20(_borrowToken).safeTransfer(msg.sender, ERC20(_borrowToken).balanceOf(address(this))); } else { msg.sender.transfer(address(this).balance); } } } contract AllowanceProxy is AdminAuth { using SafeERC20 for ERC20; address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; // TODO: Real saver exchange address SaverExchange saverExchange = SaverExchange(0x235abFAd01eb1BDa28Ef94087FBAA63E18074926); function callSell(SaverExchangeCore.ExchangeData memory exData) public payable { pullAndSendTokens(exData.srcAddr, exData.srcAmount); saverExchange.sell{value: msg.value}(exData, msg.sender); } function callBuy(SaverExchangeCore.ExchangeData memory exData) public payable { pullAndSendTokens(exData.srcAddr, exData.srcAmount); saverExchange.buy{value: msg.value}(exData, msg.sender); } function pullAndSendTokens(address _tokenAddr, uint _amount) internal { if (_tokenAddr == KYBER_ETH_ADDRESS) { require(msg.value >= _amount, "msg.value smaller than amount"); } else { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(saverExchange), _amount); } } function ownerChangeExchange(address payable _newExchange) public onlyOwner { saverExchange = SaverExchange(_newExchange); } } contract Prices is DSMath { address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; enum ActionType { SELL, BUY } /// @notice Returns the best estimated price from 2 exchanges /// @param _amount Amount of source tokens you want to exchange /// @param _srcToken Address of the source token /// @param _destToken Address of the destination token /// @param _type Type of action SELL|BUY /// @param _wrappers Array of wrapper addresses to compare /// @return (address, uint) The address of the best exchange and the exchange price function getBestPrice( uint256 _amount, address _srcToken, address _destToken, ActionType _type, address[] memory _wrappers ) public returns (address, uint256) { uint256[] memory rates = new uint256[](_wrappers.length); for (uint i=0; i<_wrappers.length; i++) { rates[i] = getExpectedRate(_wrappers[i], _srcToken, _destToken, _amount, _type); } return getBiggestRate(_wrappers, rates); } /// @notice Return the expected rate from the exchange wrapper /// @dev In case of Oasis/Uniswap handles the different precision tokens /// @param _wrapper Address of exchange wrapper /// @param _srcToken From token /// @param _destToken To token /// @param _amount Amount to be exchanged /// @param _type Type of action SELL|BUY function getExpectedRate( address _wrapper, address _srcToken, address _destToken, uint256 _amount, ActionType _type ) public returns (uint256) { bool success; bytes memory result; if (_type == ActionType.SELL) { (success, result) = _wrapper.call(abi.encodeWithSignature( "getSellRate(address,address,uint256)", _srcToken, _destToken, _amount )); } else { (success, result) = _wrapper.call(abi.encodeWithSignature( "getBuyRate(address,address,uint256)", _srcToken, _destToken, _amount )); } if (success) { return sliceUint(result, 0); } return 0; } /// @notice Finds the biggest rate between exchanges, needed for sell rate /// @param _wrappers Array of wrappers to compare /// @param _rates Array of rates to compare function getBiggestRate( address[] memory _wrappers, uint256[] memory _rates ) internal pure returns (address, uint) { uint256 maxIndex = 0; // starting from 0 in case there is only one rate in array for (uint256 i=0; i<_rates.length; i++) { if (_rates[i] > _rates[maxIndex]) { maxIndex = i; } } return (_wrappers[maxIndex], _rates[maxIndex]); } function getDecimals(address _token) internal view returns (uint256) { if (_token == KYBER_ETH_ADDRESS) return 18; return ERC20(_token).decimals(); } function sliceUint(bytes memory bs, uint256 start) internal pure returns (uint256) { require(bs.length >= start + 32, "slicing out of range"); uint256 x; assembly { x := mload(add(bs, add(0x20, start))) } return x; } } contract SaverExchangeHelper { using SafeERC20 for ERC20; address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant WETH_ADDRESS = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address payable public constant WALLET_ID = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; address public constant DISCOUNT_ADDRESS = 0x1b14E8D511c9A4395425314f849bD737BAF8208F; address public constant SAVER_EXCHANGE_REGISTRY = 0x25dd3F51e0C3c3Ff164DDC02A8E4D65Bb9cBB12D; address public constant ERC20_PROXY_0X = 0x95E6F48254609A6ee006F7D493c8e5fB97094ceF; address public constant ZRX_ALLOWLIST_ADDR = 0x4BA1f38427b33B8ab7Bb0490200dAE1F1C36823F; function getDecimals(address _token) internal view returns (uint256) { if (_token == KYBER_ETH_ADDRESS) return 18; return ERC20(_token).decimals(); } function getBalance(address _tokenAddr) internal view returns (uint balance) { if (_tokenAddr == KYBER_ETH_ADDRESS) { balance = address(this).balance; } else { balance = ERC20(_tokenAddr).balanceOf(address(this)); } } function approve0xProxy(address _tokenAddr, uint _amount) internal { if (_tokenAddr != KYBER_ETH_ADDRESS) { ERC20(_tokenAddr).safeApprove(address(ERC20_PROXY_0X), _amount); } } function sendLeftover(address _srcAddr, address _destAddr, address payable _to) internal { // send back any leftover ether or tokens if (address(this).balance > 0) { _to.transfer(address(this).balance); } if (getBalance(_srcAddr) > 0) { ERC20(_srcAddr).safeTransfer(_to, getBalance(_srcAddr)); } if (getBalance(_destAddr) > 0) { ERC20(_destAddr).safeTransfer(_to, getBalance(_destAddr)); } } function sliceUint(bytes memory bs, uint256 start) internal pure returns (uint256) { require(bs.length >= start + 32, "slicing out of range"); uint256 x; assembly { x := mload(add(bs, add(0x20, start))) } return x; } } contract SaverExchangeRegistry is AdminAuth { mapping(address => bool) private wrappers; constructor() public { wrappers[0x880A845A85F843a5c67DB2061623c6Fc3bB4c511] = true; wrappers[0x4c9B55f2083629A1F7aDa257ae984E03096eCD25] = true; wrappers[0x42A9237b872368E1bec4Ca8D26A928D7d39d338C] = true; } function addWrapper(address _wrapper) public onlyOwner { wrappers[_wrapper] = true; } function removeWrapper(address _wrapper) public onlyOwner { wrappers[_wrapper] = false; } function isWrapper(address _wrapper) public view returns(bool) { return wrappers[_wrapper]; } } contract DFSExchangeData { // first is empty to keep the legacy order in place enum ExchangeType { _, OASIS, KYBER, UNISWAP, ZEROX } enum ActionType { SELL, BUY } struct OffchainData { address exchangeAddr; address allowanceTarget; uint256 price; uint256 protocolFee; bytes callData; } struct ExchangeData { address srcAddr; address destAddr; uint256 srcAmount; uint256 destAmount; uint256 minPrice; uint256 dfsFeeDivider; // service fee divider address user; // user to check special fee address wrapper; bytes wrapperData; OffchainData offchainData; } function packExchangeData(ExchangeData memory _exData) public pure returns(bytes memory) { return abi.encode(_exData); } function unpackExchangeData(bytes memory _data) public pure returns(ExchangeData memory _exData) { _exData = abi.decode(_data, (ExchangeData)); } } contract DFSExchangeHelper { using SafeERC20 for ERC20; address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant WETH_ADDRESS = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address payable public constant WALLET_ID = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; address public constant DISCOUNT_ADDRESS = 0x1b14E8D511c9A4395425314f849bD737BAF8208F; address public constant SAVER_EXCHANGE_REGISTRY = 0x25dd3F51e0C3c3Ff164DDC02A8E4D65Bb9cBB12D; address public constant ZRX_ALLOWLIST_ADDR = 0x4BA1f38427b33B8ab7Bb0490200dAE1F1C36823F; function getDecimals(address _token) internal view returns (uint256) { if (_token == KYBER_ETH_ADDRESS) return 18; return ERC20(_token).decimals(); } function getBalance(address _tokenAddr) internal view returns (uint balance) { if (_tokenAddr == KYBER_ETH_ADDRESS) { balance = address(this).balance; } else { balance = ERC20(_tokenAddr).balanceOf(address(this)); } } function sendLeftover(address _srcAddr, address _destAddr, address payable _to) internal { // send back any leftover ether or tokens if (address(this).balance > 0) { _to.transfer(address(this).balance); } if (getBalance(_srcAddr) > 0) { ERC20(_srcAddr).safeTransfer(_to, getBalance(_srcAddr)); } if (getBalance(_destAddr) > 0) { ERC20(_destAddr).safeTransfer(_to, getBalance(_destAddr)); } } /// @notice Takes a feePercentage and sends it to wallet /// @param _amount Dai amount of the whole trade /// @param _user Address of the user /// @param _token Address of the token /// @param _dfsFeeDivider Dfs fee divider /// @return feeAmount Amount in Dai owner earned on the fee function getFee(uint256 _amount, address _user, address _token, uint256 _dfsFeeDivider) internal returns (uint256 feeAmount) { if (_dfsFeeDivider != 0 && Discount(DISCOUNT_ADDRESS).isCustomFeeSet(_user)) { _dfsFeeDivider = Discount(DISCOUNT_ADDRESS).getCustomServiceFee(_user); } if (_dfsFeeDivider == 0) { feeAmount = 0; } else { feeAmount = _amount / _dfsFeeDivider; // fee can't go over 10% of the whole amount if (feeAmount > (_amount / 10)) { feeAmount = _amount / 10; } if (_token == KYBER_ETH_ADDRESS) { WALLET_ID.transfer(feeAmount); } else { ERC20(_token).safeTransfer(WALLET_ID, feeAmount); } } } function sliceUint(bytes memory bs, uint256 start) internal pure returns (uint256) { require(bs.length >= start + 32, "slicing out of range"); uint256 x; assembly { x := mload(add(bs, add(0x20, start))) } return x; } } contract DFSPrices is DSMath { address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; enum ActionType { SELL, BUY } /// @notice Returns the best estimated price from 2 exchanges /// @param _amount Amount of source tokens you want to exchange /// @param _srcToken Address of the source token /// @param _destToken Address of the destination token /// @param _type Type of action SELL|BUY /// @param _wrappers Array of wrapper addresses to compare /// @return (address, uint) The address of the best exchange and the exchange price function getBestPrice( uint256 _amount, address _srcToken, address _destToken, ActionType _type, address[] memory _wrappers, bytes[] memory _additionalData ) public returns (address, uint256) { uint256[] memory rates = new uint256[](_wrappers.length); for (uint i=0; i<_wrappers.length; i++) { rates[i] = getExpectedRate(_wrappers[i], _srcToken, _destToken, _amount, _type, _additionalData[i]); } return getBiggestRate(_wrappers, rates); } /// @notice Return the expected rate from the exchange wrapper /// @dev In case of Oasis/Uniswap handles the different precision tokens /// @param _wrapper Address of exchange wrapper /// @param _srcToken From token /// @param _destToken To token /// @param _amount Amount to be exchanged /// @param _type Type of action SELL|BUY function getExpectedRate( address _wrapper, address _srcToken, address _destToken, uint256 _amount, ActionType _type, bytes memory _additionalData ) public returns (uint256) { bool success; bytes memory result; if (_type == ActionType.SELL) { (success, result) = _wrapper.call(abi.encodeWithSignature( "getSellRate(address,address,uint256,bytes)", _srcToken, _destToken, _amount, _additionalData )); } else { (success, result) = _wrapper.call(abi.encodeWithSignature( "getBuyRate(address,address,uint256,bytes)", _srcToken, _destToken, _amount, _additionalData )); } if (success) { return sliceUint(result, 0); } return 0; } /// @notice Finds the biggest rate between exchanges, needed for sell rate /// @param _wrappers Array of wrappers to compare /// @param _rates Array of rates to compare function getBiggestRate( address[] memory _wrappers, uint256[] memory _rates ) internal pure returns (address, uint) { uint256 maxIndex = 0; // starting from 0 in case there is only one rate in array for (uint256 i=0; i<_rates.length; i++) { if (_rates[i] > _rates[maxIndex]) { maxIndex = i; } } return (_wrappers[maxIndex], _rates[maxIndex]); } function getDecimals(address _token) internal view returns (uint256) { if (_token == KYBER_ETH_ADDRESS) return 18; return ERC20(_token).decimals(); } function sliceUint(bytes memory bs, uint256 start) internal pure returns (uint256) { require(bs.length >= start + 32, "slicing out of range"); uint256 x; assembly { x := mload(add(bs, add(0x20, start))) } return x; } } abstract contract CEtherInterface { function mint() external virtual payable; function repayBorrow() external virtual payable; } abstract contract CompoundOracleInterface { function getUnderlyingPrice(address cToken) external view virtual returns (uint); } abstract contract ComptrollerInterface { struct CompMarketState { uint224 index; uint32 block; } function claimComp(address holder) public virtual; function claimComp(address holder, address[] memory cTokens) public virtual; function claimComp(address[] memory holders, address[] memory cTokens, bool borrowers, bool suppliers) public virtual; function compSupplyState(address) public view virtual returns (CompMarketState memory); function compSupplierIndex(address,address) public view virtual returns (uint); function compAccrued(address) public view virtual returns (uint); function compBorrowState(address) public view virtual returns (CompMarketState memory); function compBorrowerIndex(address,address) public view virtual returns (uint); function enterMarkets(address[] calldata cTokens) external virtual returns (uint256[] memory); function exitMarket(address cToken) external virtual returns (uint256); function getAssetsIn(address account) external virtual view returns (address[] memory); function markets(address account) public virtual view returns (bool, uint256); function getAccountLiquidity(address account) external virtual view returns (uint256, uint256, uint256); function oracle() public virtual view returns (address); } abstract contract DSProxyInterface { /// Truffle wont compile if this isn't commented // function execute(bytes memory _code, bytes memory _data) // public virtual // payable // returns (address, bytes32); function execute(address _target, bytes memory _data) public virtual payable returns (bytes32); function setCache(address _cacheAddr) public virtual payable returns (bool); function owner() public virtual returns (address); } abstract contract DaiJoin { function vat() public virtual returns (Vat); function dai() public virtual returns (Gem); function join(address, uint) public virtual payable; function exit(address, uint) public virtual; } interface ERC20 { function totalSupply() external view returns (uint256 supply); function balanceOf(address _owner) external view returns (uint256 balance); function transfer(address _to, uint256 _value) external returns (bool success); function transferFrom(address _from, address _to, uint256 _value) external returns (bool success); function approve(address _spender, uint256 _value) external returns (bool success); function allowance(address _owner, address _spender) external view returns (uint256 remaining); function decimals() external view returns (uint256 digits); event Approval(address indexed _owner, address indexed _spender, uint256 _value); } interface ExchangeInterface { function swapEtherToToken(uint256 _ethAmount, address _tokenAddress, uint256 _maxAmount) external payable returns (uint256, uint256); function swapTokenToEther(address _tokenAddress, uint256 _amount, uint256 _maxAmount) external returns (uint256); function swapTokenToToken(address _src, address _dest, uint256 _amount) external payable returns (uint256); function getExpectedRate(address src, address dest, uint256 srcQty) external view returns (uint256 expectedRate); } interface ExchangeInterfaceV2 { function sell(address _srcAddr, address _destAddr, uint _srcAmount) external payable returns (uint); function buy(address _srcAddr, address _destAddr, uint _destAmount) external payable returns(uint); function getSellRate(address _srcAddr, address _destAddr, uint _srcAmount) external view returns (uint); function getBuyRate(address _srcAddr, address _destAddr, uint _srcAmount) external view returns (uint); } interface ExchangeInterfaceV3 { function sell(address _srcAddr, address _destAddr, uint _srcAmount, bytes memory _additionalData) external payable returns (uint); function buy(address _srcAddr, address _destAddr, uint _destAmount, bytes memory _additionalData) external payable returns(uint); function getSellRate(address _srcAddr, address _destAddr, uint _srcAmount, bytes memory _additionalData) external view returns (uint); function getBuyRate(address _srcAddr, address _destAddr, uint _srcAmount, bytes memory _additionalData) external view returns (uint); } abstract contract Flipper { function bids(uint _bidId) public virtual returns (uint256, uint256, address, uint48, uint48, address, address, uint256); function tend(uint id, uint lot, uint bid) virtual external; function dent(uint id, uint lot, uint bid) virtual external; function deal(uint id) virtual external; } abstract contract GasTokenInterface is ERC20 { function free(uint256 value) public virtual returns (bool success); function freeUpTo(uint256 value) public virtual returns (uint256 freed); function freeFrom(address from, uint256 value) public virtual returns (bool success); function freeFromUpTo(address from, uint256 value) public virtual returns (uint256 freed); } abstract contract Gem { function dec() virtual public returns (uint); function gem() virtual public returns (Gem); function join(address, uint) virtual public payable; function exit(address, uint) virtual public; function approve(address, uint) virtual public; function transfer(address, uint) virtual public returns (bool); function transferFrom(address, address, uint) virtual public returns (bool); function deposit() virtual public payable; function withdraw(uint) virtual public; function allowance(address, address) virtual public returns (uint); } abstract contract IAToken { function redeem(uint256 _amount) external virtual; function balanceOf(address _owner) external virtual view returns (uint256 balance); } abstract contract IAaveSubscription { function subscribe(uint128 _minRatio, uint128 _maxRatio, uint128 _optimalBoost, uint128 _optimalRepay, bool _boostEnabled) public virtual; function unsubscribe() public virtual; } abstract contract ICompoundSubscription { function subscribe(uint128 _minRatio, uint128 _maxRatio, uint128 _optimalBoost, uint128 _optimalRepay, bool _boostEnabled) public virtual; function unsubscribe() public virtual; } abstract contract ICompoundSubscriptions { function unsubscribe() external virtual ; } abstract contract ILendingPool { function flashLoan( address payable _receiver, address _reserve, uint _amount, bytes calldata _params) external virtual; function deposit(address _reserve, uint256 _amount, uint16 _referralCode) external virtual payable; function setUserUseReserveAsCollateral(address _reserve, bool _useAsCollateral) external virtual; function borrow(address _reserve, uint256 _amount, uint256 _interestRateMode, uint16 _referralCode) external virtual; function repay( address _reserve, uint256 _amount, address payable _onBehalfOf) external virtual payable; function swapBorrowRateMode(address _reserve) external virtual; function getReserves() external virtual view returns(address[] memory); /// @param _reserve underlying token address function getReserveData(address _reserve) external virtual view returns ( uint256 totalLiquidity, // reserve total liquidity uint256 availableLiquidity, // reserve available liquidity for borrowing uint256 totalBorrowsStable, // total amount of outstanding borrows at Stable rate uint256 totalBorrowsVariable, // total amount of outstanding borrows at Variable rate uint256 liquidityRate, // current deposit APY of the reserve for depositors, in Ray units. uint256 variableBorrowRate, // current variable rate APY of the reserve pool, in Ray units. uint256 stableBorrowRate, // current stable rate APY of the reserve pool, in Ray units. uint256 averageStableBorrowRate, // current average stable borrow rate uint256 utilizationRate, // expressed as total borrows/total liquidity. uint256 liquidityIndex, // cumulative liquidity index uint256 variableBorrowIndex, // cumulative variable borrow index address aTokenAddress, // aTokens contract address for the specific _reserve uint40 lastUpdateTimestamp // timestamp of the last update of reserve data ); /// @param _user users address function getUserAccountData(address _user) external virtual view returns ( uint256 totalLiquidityETH, // user aggregated deposits across all the reserves. In Wei uint256 totalCollateralETH, // user aggregated collateral across all the reserves. In Wei uint256 totalBorrowsETH, // user aggregated outstanding borrows across all the reserves. In Wei uint256 totalFeesETH, // user aggregated current outstanding fees in ETH. In Wei uint256 availableBorrowsETH, // user available amount to borrow in ETH uint256 currentLiquidationThreshold, // user current average liquidation threshold across all the collaterals deposited uint256 ltv, // user average Loan-to-Value between all the collaterals uint256 healthFactor // user current Health Factor ); /// @param _reserve underlying token address /// @param _user users address function getUserReserveData(address _reserve, address _user) external virtual view returns ( uint256 currentATokenBalance, // user current reserve aToken balance uint256 currentBorrowBalance, // user current reserve outstanding borrow balance uint256 principalBorrowBalance, // user balance of borrowed asset uint256 borrowRateMode, // user borrow rate mode either Stable or Variable uint256 borrowRate, // user current borrow rate APY uint256 liquidityRate, // user current earn rate on _reserve uint256 originationFee, // user outstanding loan origination fee uint256 variableBorrowIndex, // user variable cumulative index uint256 lastUpdateTimestamp, // Timestamp of the last data update bool usageAsCollateralEnabled // Whether the user's current reserve is enabled as a collateral ); function getReserveConfigurationData(address _reserve) external virtual view returns ( uint256 ltv, uint256 liquidationThreshold, uint256 liquidationBonus, address rateStrategyAddress, bool usageAsCollateralEnabled, bool borrowingEnabled, bool stableBorrowRateEnabled, bool isActive ); // ------------------ LendingPoolCoreData ------------------------ function getReserveATokenAddress(address _reserve) public virtual view returns (address); function getReserveConfiguration(address _reserve) external virtual view returns (uint256, uint256, uint256, bool); function getUserUnderlyingAssetBalance(address _reserve, address _user) public virtual view returns (uint256); function getReserveCurrentLiquidityRate(address _reserve) public virtual view returns (uint256); function getReserveCurrentVariableBorrowRate(address _reserve) public virtual view returns (uint256); function getReserveCurrentStableBorrowRate(address _reserve) public virtual view returns (uint256); function getReserveTotalLiquidity(address _reserve) public virtual view returns (uint256); function getReserveAvailableLiquidity(address _reserve) public virtual view returns (uint256); function getReserveTotalBorrowsVariable(address _reserve) public virtual view returns (uint256); // ---------------- LendingPoolDataProvider --------------------- function calculateUserGlobalData(address _user) public virtual view returns ( uint256 totalLiquidityBalanceETH, uint256 totalCollateralBalanceETH, uint256 totalBorrowBalanceETH, uint256 totalFeesETH, uint256 currentLtv, uint256 currentLiquidationThreshold, uint256 healthFactor, bool healthFactorBelowThreshold ); } abstract contract ILendingPoolAddressesProvider { function getLendingPool() public virtual view returns (address); function getLendingPoolCore() public virtual view returns (address payable); function getLendingPoolConfigurator() public virtual view returns (address); function getLendingPoolDataProvider() public virtual view returns (address); function getLendingPoolParametersProvider() public virtual view returns (address); function getTokenDistributor() public virtual view returns (address); function getFeeProvider() public virtual view returns (address); function getLendingPoolLiquidationManager() public virtual view returns (address); function getLendingPoolManager() public virtual view returns (address); function getPriceOracle() public virtual view returns (address); function getLendingRateOracle() public virtual view returns (address); } abstract contract ILoanShifter { function getLoanAmount(uint, address) public virtual returns (uint); function getUnderlyingAsset(address _addr) public view virtual returns (address); } abstract contract IMCDSubscriptions { function unsubscribe(uint256 _cdpId) external virtual ; function subscribersPos(uint256 _cdpId) external virtual returns (uint256, bool); } abstract contract IPriceOracleGetterAave { function getAssetPrice(address _asset) external virtual view returns (uint256); function getAssetsPrices(address[] calldata _assets) external virtual view returns(uint256[] memory); function getSourceOfAsset(address _asset) external virtual view returns(address); function getFallbackOracle() external virtual view returns(address); } abstract contract ITokenInterface is ERC20 { function assetBalanceOf(address _owner) public virtual view returns (uint256); function mint(address receiver, uint256 depositAmount) external virtual returns (uint256 mintAmount); function burn(address receiver, uint256 burnAmount) external virtual returns (uint256 loanAmountPaid); function tokenPrice() public virtual view returns (uint256 price); } abstract contract Join { bytes32 public ilk; function dec() virtual public view returns (uint); function gem() virtual public view returns (Gem); function join(address, uint) virtual public payable; function exit(address, uint) virtual public; } abstract contract Jug { struct Ilk { uint256 duty; uint256 rho; } mapping (bytes32 => Ilk) public ilks; function drip(bytes32) public virtual returns (uint); } abstract contract KyberNetworkProxyInterface { function maxGasPrice() external virtual view returns (uint256); function getUserCapInWei(address user) external virtual view returns (uint256); function getUserCapInTokenWei(address user, ERC20 token) external virtual view returns (uint256); function enabled() external virtual view returns (bool); function info(bytes32 id) external virtual view returns (uint256); function getExpectedRate(ERC20 src, ERC20 dest, uint256 srcQty) public virtual view returns (uint256 expectedRate, uint256 slippageRate); function tradeWithHint( ERC20 src, uint256 srcAmount, ERC20 dest, address destAddress, uint256 maxDestAmount, uint256 minConversionRate, address walletId, bytes memory hint ) public virtual payable returns (uint256); function trade( ERC20 src, uint256 srcAmount, ERC20 dest, address destAddress, uint256 maxDestAmount, uint256 minConversionRate, address walletId ) public virtual payable returns (uint256); function swapEtherToToken(ERC20 token, uint256 minConversionRate) external virtual payable returns (uint256); function swapTokenToEther(ERC20 token, uint256 tokenQty, uint256 minRate) external virtual payable returns (uint256); function swapTokenToToken(ERC20 src, uint256 srcAmount, ERC20 dest, uint256 minConversionRate) public virtual returns (uint256); } abstract contract Manager { function last(address) virtual public returns (uint); function cdpCan(address, uint, address) virtual public view returns (uint); function ilks(uint) virtual public view returns (bytes32); function owns(uint) virtual public view returns (address); function urns(uint) virtual public view returns (address); function vat() virtual public view returns (address); function open(bytes32, address) virtual public returns (uint); function give(uint, address) virtual public; function cdpAllow(uint, address, uint) virtual public; function urnAllow(address, uint) virtual public; function frob(uint, int, int) virtual public; function flux(uint, address, uint) virtual public; function move(uint, address, uint) virtual public; function exit(address, uint, address, uint) virtual public; function quit(uint, address) virtual public; function enter(address, uint) virtual public; function shift(uint, uint) virtual public; } abstract contract OasisInterface { function getBuyAmount(address tokenToBuy, address tokenToPay, uint256 amountToPay) external virtual view returns (uint256 amountBought); function getPayAmount(address tokenToPay, address tokenToBuy, uint256 amountToBuy) public virtual view returns (uint256 amountPaid); function sellAllAmount(address pay_gem, uint256 pay_amt, address buy_gem, uint256 min_fill_amount) public virtual returns (uint256 fill_amt); function buyAllAmount(address buy_gem, uint256 buy_amt, address pay_gem, uint256 max_fill_amount) public virtual returns (uint256 fill_amt); } abstract contract Osm { mapping(address => uint256) public bud; function peep() external view virtual returns (bytes32, bool); } abstract contract OsmMom { mapping (bytes32 => address) public osms; } abstract contract PipInterface { function read() public virtual returns (bytes32); } abstract contract ProxyRegistryInterface { function proxies(address _owner) public virtual view returns (address); function build(address) public virtual returns (address); } abstract contract Spotter { struct Ilk { PipInterface pip; uint256 mat; } mapping (bytes32 => Ilk) public ilks; uint256 public par; } abstract contract TokenInterface { function allowance(address, address) public virtual returns (uint256); function balanceOf(address) public virtual returns (uint256); function approve(address, uint256) public virtual; function transfer(address, uint256) public virtual returns (bool); function transferFrom(address, address, uint256) public virtual returns (bool); function deposit() public virtual payable; function withdraw(uint256) public virtual; } abstract contract UniswapExchangeInterface { function getEthToTokenInputPrice(uint256 eth_sold) external virtual view returns (uint256 tokens_bought); function getEthToTokenOutputPrice(uint256 tokens_bought) external virtual view returns (uint256 eth_sold); function getTokenToEthInputPrice(uint256 tokens_sold) external virtual view returns (uint256 eth_bought); function getTokenToEthOutputPrice(uint256 eth_bought) external virtual view returns (uint256 tokens_sold); function tokenToEthTransferInput( uint256 tokens_sold, uint256 min_eth, uint256 deadline, address recipient ) external virtual returns (uint256 eth_bought); function ethToTokenTransferInput(uint256 min_tokens, uint256 deadline, address recipient) external virtual payable returns (uint256 tokens_bought); function tokenToTokenTransferInput( uint256 tokens_sold, uint256 min_tokens_bought, uint256 min_eth_bought, uint256 deadline, address recipient, address token_addr ) external virtual returns (uint256 tokens_bought); function ethToTokenTransferOutput( uint256 tokens_bought, uint256 deadline, address recipient ) external virtual payable returns (uint256 eth_sold); function tokenToEthTransferOutput( uint256 eth_bought, uint256 max_tokens, uint256 deadline, address recipient ) external virtual returns (uint256 tokens_sold); function tokenToTokenTransferOutput( uint256 tokens_bought, uint256 max_tokens_sold, uint256 max_eth_sold, uint256 deadline, address recipient, address token_addr ) external virtual returns (uint256 tokens_sold); } abstract contract UniswapFactoryInterface { function getExchange(address token) external view virtual returns (address exchange); } abstract contract UniswapRouterInterface { function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline) external virtual returns (uint[] memory amounts); function swapExactTokensForTokens( uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline ) external virtual returns (uint[] memory amounts); function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline) external virtual returns (uint[] memory amounts); function swapTokensForExactTokens( uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline ) external virtual returns (uint[] memory amounts); function getAmountsOut(uint amountIn, address[] memory path) public virtual view returns (uint[] memory amounts); function getAmountsIn(uint amountOut, address[] memory path) public virtual view returns (uint[] memory amounts); } abstract contract Vat { struct Urn { uint256 ink; // Locked Collateral [wad] uint256 art; // Normalised Debt [wad] } struct Ilk { uint256 Art; // Total Normalised Debt [wad] uint256 rate; // Accumulated Rates [ray] uint256 spot; // Price with Safety Margin [ray] uint256 line; // Debt Ceiling [rad] uint256 dust; // Urn Debt Floor [rad] } mapping (bytes32 => mapping (address => Urn )) public urns; mapping (bytes32 => Ilk) public ilks; mapping (bytes32 => mapping (address => uint)) public gem; // [wad] function can(address, address) virtual public view returns (uint); function dai(address) virtual public view returns (uint); function frob(bytes32, address, address, address, int, int) virtual public; function hope(address) virtual public; function move(address, address, uint) virtual public; function fork(bytes32, address, address, int, int) virtual public; } contract DefisaverLogger { event LogEvent( address indexed contractAddress, address indexed caller, string indexed logName, bytes data ); // solhint-disable-next-line func-name-mixedcase function Log(address _contract, address _caller, string memory _logName, bytes memory _data) public { emit LogEvent(_contract, _caller, _logName, _data); } } contract MCDMonitorProxyV2 is AdminAuth { uint public CHANGE_PERIOD; address public monitor; address public newMonitor; address public lastMonitor; uint public changeRequestedTimestamp; mapping(address => bool) public allowed; event MonitorChangeInitiated(address oldMonitor, address newMonitor); event MonitorChangeCanceled(); event MonitorChangeFinished(address monitor); event MonitorChangeReverted(address monitor); // if someone who is allowed become malicious, owner can't be changed modifier onlyAllowed() { require(allowed[msg.sender] || msg.sender == owner); _; } modifier onlyMonitor() { require (msg.sender == monitor); _; } constructor(uint _changePeriod) public { CHANGE_PERIOD = _changePeriod * 1 days; } /// @notice Only monitor contract is able to call execute on users proxy /// @param _owner Address of cdp owner (users DSProxy address) /// @param _saverProxy Address of MCDSaverProxy /// @param _data Data to send to MCDSaverProxy function callExecute(address _owner, address _saverProxy, bytes memory _data) public payable onlyMonitor { // execute reverts if calling specific method fails DSProxyInterface(_owner).execute{value: msg.value}(_saverProxy, _data); // return if anything left if (address(this).balance > 0) { msg.sender.transfer(address(this).balance); } } /// @notice Allowed users are able to set Monitor contract without any waiting period first time /// @param _monitor Address of Monitor contract function setMonitor(address _monitor) public onlyAllowed { require(monitor == address(0)); monitor = _monitor; } /// @notice Allowed users are able to start procedure for changing monitor /// @dev after CHANGE_PERIOD needs to call confirmNewMonitor to actually make a change /// @param _newMonitor address of new monitor function changeMonitor(address _newMonitor) public onlyAllowed { require(changeRequestedTimestamp == 0); changeRequestedTimestamp = now; lastMonitor = monitor; newMonitor = _newMonitor; emit MonitorChangeInitiated(lastMonitor, newMonitor); } /// @notice At any point allowed users are able to cancel monitor change function cancelMonitorChange() public onlyAllowed { require(changeRequestedTimestamp > 0); changeRequestedTimestamp = 0; newMonitor = address(0); emit MonitorChangeCanceled(); } /// @notice Anyone is able to confirm new monitor after CHANGE_PERIOD if process is started function confirmNewMonitor() public onlyAllowed { require((changeRequestedTimestamp + CHANGE_PERIOD) < now); require(changeRequestedTimestamp != 0); require(newMonitor != address(0)); monitor = newMonitor; newMonitor = address(0); changeRequestedTimestamp = 0; emit MonitorChangeFinished(monitor); } /// @notice Its possible to revert monitor to last used monitor function revertMonitor() public onlyAllowed { require(lastMonitor != address(0)); monitor = lastMonitor; emit MonitorChangeReverted(monitor); } /// @notice Allowed users are able to add new allowed user /// @param _user Address of user that will be allowed function addAllowed(address _user) public onlyAllowed { allowed[_user] = true; } /// @notice Allowed users are able to remove allowed user /// @dev owner is always allowed even if someone tries to remove it from allowed mapping /// @param _user Address of allowed user function removeAllowed(address _user) public onlyAllowed { allowed[_user] = false; } function setChangePeriod(uint _periodInDays) public onlyAllowed { require(_periodInDays * 1 days > CHANGE_PERIOD); CHANGE_PERIOD = _periodInDays * 1 days; } } contract MCDPriceVerifier is AdminAuth { OsmMom public osmMom = OsmMom(0x76416A4d5190d071bfed309861527431304aA14f); Manager public manager = Manager(0x5ef30b9986345249bc32d8928B7ee64DE9435E39); mapping(address => bool) public authorized; function verifyVaultNextPrice(uint _nextPrice, uint _cdpId) public view returns(bool) { require(authorized[msg.sender]); bytes32 ilk = manager.ilks(_cdpId); return verifyNextPrice(_nextPrice, ilk); } function verifyNextPrice(uint _nextPrice, bytes32 _ilk) public view returns(bool) { require(authorized[msg.sender]); address osmAddress = osmMom.osms(_ilk); uint whitelisted = Osm(osmAddress).bud(address(this)); // If contracts doesn't have access return true if (whitelisted != 1) return true; (bytes32 price, bool has) = Osm(osmAddress).peep(); return has ? uint(price) == _nextPrice : false; } function setAuthorized(address _address, bool _allowed) public onlyOwner { authorized[_address] = _allowed; } } abstract contract StaticV2 { enum Method { Boost, Repay } struct CdpHolder { uint128 minRatio; uint128 maxRatio; uint128 optimalRatioBoost; uint128 optimalRatioRepay; address owner; uint cdpId; bool boostEnabled; bool nextPriceEnabled; } struct SubPosition { uint arrPos; bool subscribed; } } contract SubscriptionsInterfaceV2 { function subscribe(uint _cdpId, uint128 _minRatio, uint128 _maxRatio, uint128 _optimalBoost, uint128 _optimalRepay, bool _boostEnabled, bool _nextPriceEnabled) external {} function unsubscribe(uint _cdpId) external {} } contract SubscriptionsProxyV2 { address public constant MONITOR_PROXY_ADDRESS = 0x7456f4218874eAe1aF8B83a64848A1B89fEB7d7C; address public constant OLD_SUBSCRIPTION = 0x83152CAA0d344a2Fd428769529e2d490A88f4393; address public constant FACTORY_ADDRESS = 0x5a15566417e6C1c9546523066500bDDBc53F88C7; function migrate(uint _cdpId, uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled, bool _nextPriceEnabled, address _subscriptions) public { SubscriptionsInterfaceV2(OLD_SUBSCRIPTION).unsubscribe(_cdpId); subscribe(_cdpId, _minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled, _nextPriceEnabled, _subscriptions); } function subscribe(uint _cdpId, uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled, bool _nextPriceEnabled, address _subscriptions) public { address currAuthority = address(DSAuth(address(this)).authority()); DSGuard guard = DSGuard(currAuthority); if (currAuthority == address(0)) { guard = DSGuardFactory(FACTORY_ADDRESS).newGuard(); DSAuth(address(this)).setAuthority(DSAuthority(address(guard))); } guard.permit(MONITOR_PROXY_ADDRESS, address(this), bytes4(keccak256("execute(address,bytes)"))); SubscriptionsInterfaceV2(_subscriptions).subscribe(_cdpId, _minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled, _nextPriceEnabled); } function update(uint _cdpId, uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled, bool _nextPriceEnabled, address _subscriptions) public { SubscriptionsInterfaceV2(_subscriptions).subscribe(_cdpId, _minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled, _nextPriceEnabled); } function unsubscribe(uint _cdpId, address _subscriptions) public { SubscriptionsInterfaceV2(_subscriptions).unsubscribe(_cdpId); } } contract SubscriptionsV2 is AdminAuth, StaticV2 { bytes32 internal constant ETH_ILK = 0x4554482d41000000000000000000000000000000000000000000000000000000; bytes32 internal constant BAT_ILK = 0x4241542d41000000000000000000000000000000000000000000000000000000; address public constant MANAGER_ADDRESS = 0x5ef30b9986345249bc32d8928B7ee64DE9435E39; address public constant VAT_ADDRESS = 0x35D1b3F3D7966A1DFe207aa4514C12a259A0492B; address public constant SPOTTER_ADDRESS = 0x65C79fcB50Ca1594B025960e539eD7A9a6D434A3; CdpHolder[] public subscribers; mapping (uint => SubPosition) public subscribersPos; mapping (bytes32 => uint) public minLimits; uint public changeIndex; Manager public manager = Manager(MANAGER_ADDRESS); Vat public vat = Vat(VAT_ADDRESS); Spotter public spotter = Spotter(SPOTTER_ADDRESS); MCDSaverProxy public saverProxy; event Subscribed(address indexed owner, uint cdpId); event Unsubscribed(address indexed owner, uint cdpId); event Updated(address indexed owner, uint cdpId); event ParamUpdates(address indexed owner, uint cdpId, uint128, uint128, uint128, uint128, bool boostEnabled); /// @param _saverProxy Address of the MCDSaverProxy contract constructor(address _saverProxy) public { saverProxy = MCDSaverProxy(payable(_saverProxy)); minLimits[ETH_ILK] = 1700000000000000000; minLimits[BAT_ILK] = 1700000000000000000; } /// @dev Called by the DSProxy contract which owns the CDP /// @notice Adds the users CDP in the list of subscriptions so it can be monitored /// @param _cdpId Id of the CDP /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalBoost Ratio amount which boost should target /// @param _optimalRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled /// @param _nextPriceEnabled Boolean determing if we can use nextPrice for this cdp function subscribe(uint _cdpId, uint128 _minRatio, uint128 _maxRatio, uint128 _optimalBoost, uint128 _optimalRepay, bool _boostEnabled, bool _nextPriceEnabled) external { require(isOwner(msg.sender, _cdpId), "Must be called by Cdp owner"); // if boost is not enabled, set max ratio to max uint uint128 localMaxRatio = _boostEnabled ? _maxRatio : uint128(-1); require(checkParams(manager.ilks(_cdpId), _minRatio, localMaxRatio), "Must be correct params"); SubPosition storage subInfo = subscribersPos[_cdpId]; CdpHolder memory subscription = CdpHolder({ minRatio: _minRatio, maxRatio: localMaxRatio, optimalRatioBoost: _optimalBoost, optimalRatioRepay: _optimalRepay, owner: msg.sender, cdpId: _cdpId, boostEnabled: _boostEnabled, nextPriceEnabled: _nextPriceEnabled }); changeIndex++; if (subInfo.subscribed) { subscribers[subInfo.arrPos] = subscription; emit Updated(msg.sender, _cdpId); emit ParamUpdates(msg.sender, _cdpId, _minRatio, localMaxRatio, _optimalBoost, _optimalRepay, _boostEnabled); } else { subscribers.push(subscription); subInfo.arrPos = subscribers.length - 1; subInfo.subscribed = true; emit Subscribed(msg.sender, _cdpId); } } /// @notice Called by the users DSProxy /// @dev Owner who subscribed cancels his subscription function unsubscribe(uint _cdpId) external { require(isOwner(msg.sender, _cdpId), "Must be called by Cdp owner"); _unsubscribe(_cdpId); } /// @dev Checks if the _owner is the owner of the CDP function isOwner(address _owner, uint _cdpId) internal view returns (bool) { return getOwner(_cdpId) == _owner; } /// @dev Checks limit for minimum ratio and if minRatio is bigger than max function checkParams(bytes32 _ilk, uint128 _minRatio, uint128 _maxRatio) internal view returns (bool) { if (_minRatio < minLimits[_ilk]) { return false; } if (_minRatio > _maxRatio) { return false; } return true; } /// @dev Internal method to remove a subscriber from the list function _unsubscribe(uint _cdpId) internal { require(subscribers.length > 0, "Must have subscribers in the list"); SubPosition storage subInfo = subscribersPos[_cdpId]; require(subInfo.subscribed, "Must first be subscribed"); uint lastCdpId = subscribers[subscribers.length - 1].cdpId; SubPosition storage subInfo2 = subscribersPos[lastCdpId]; subInfo2.arrPos = subInfo.arrPos; subscribers[subInfo.arrPos] = subscribers[subscribers.length - 1]; subscribers.pop(); changeIndex++; subInfo.subscribed = false; subInfo.arrPos = 0; emit Unsubscribed(msg.sender, _cdpId); } /// @notice Returns an address that owns the CDP /// @param _cdpId Id of the CDP function getOwner(uint _cdpId) public view returns(address) { return manager.owns(_cdpId); } /// @notice Helper method for the front to get all the info about the subscribed CDP function getSubscribedInfo(uint _cdpId) public view returns(bool, uint128, uint128, uint128, uint128, address, uint coll, uint debt) { SubPosition memory subInfo = subscribersPos[_cdpId]; if (!subInfo.subscribed) return (false, 0, 0, 0, 0, address(0), 0, 0); (coll, debt) = saverProxy.getCdpInfo(manager, _cdpId, manager.ilks(_cdpId)); CdpHolder memory subscriber = subscribers[subInfo.arrPos]; return ( true, subscriber.minRatio, subscriber.maxRatio, subscriber.optimalRatioRepay, subscriber.optimalRatioBoost, subscriber.owner, coll, debt ); } function getCdpHolder(uint _cdpId) public view returns (bool subscribed, CdpHolder memory) { SubPosition memory subInfo = subscribersPos[_cdpId]; if (!subInfo.subscribed) return (false, CdpHolder(0, 0, 0, 0, address(0), 0, false, false)); CdpHolder memory subscriber = subscribers[subInfo.arrPos]; return (true, subscriber); } /// @notice Helper method for the front to get the information about the ilk of a CDP function getIlkInfo(bytes32 _ilk, uint _cdpId) public view returns(bytes32 ilk, uint art, uint rate, uint spot, uint line, uint dust, uint mat, uint par) { // send either ilk or cdpId if (_ilk == bytes32(0)) { _ilk = manager.ilks(_cdpId); } ilk = _ilk; (,mat) = spotter.ilks(_ilk); par = spotter.par(); (art, rate, spot, line, dust) = vat.ilks(_ilk); } /// @notice Helper method to return all the subscribed CDPs function getSubscribers() public view returns (CdpHolder[] memory) { return subscribers; } /// @notice Helper method to return all the subscribed CDPs function getSubscribersByPage(uint _page, uint _perPage) public view returns (CdpHolder[] memory) { CdpHolder[] memory holders = new CdpHolder[](_perPage); uint start = _page * _perPage; uint end = start + _perPage; uint count = 0; for (uint i=start; i<end; i++) { holders[count] = subscribers[i]; count++; } return holders; } ////////////// ADMIN METHODS /////////////////// /// @notice Admin function to change a min. limit for an asset function changeMinRatios(bytes32 _ilk, uint _newRatio) public onlyOwner { minLimits[_ilk] = _newRatio; } /// @notice Admin function to unsubscribe a CDP function unsubscribeByAdmin(uint _cdpId) public onlyOwner { SubPosition storage subInfo = subscribersPos[_cdpId]; if (subInfo.subscribed) { _unsubscribe(_cdpId); } } } contract BidProxy { address public constant DAI_JOIN = 0x9759A6Ac90977b93B58547b4A71c78317f391A28; address public constant VAT_ADDRESS = 0x35D1b3F3D7966A1DFe207aa4514C12a259A0492B; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; function daiBid(uint _bidId, uint _amount, address _flipper) public { uint tendAmount = _amount * (10 ** 27); joinDai(_amount); (, uint lot, , , , , , ) = Flipper(_flipper).bids(_bidId); Vat(VAT_ADDRESS).hope(_flipper); Flipper(_flipper).tend(_bidId, lot, tendAmount); } function collateralBid(uint _bidId, uint _amount, address _flipper) public { (uint bid, , , , , , , ) = Flipper(_flipper).bids(_bidId); joinDai(bid / (10**27)); Vat(VAT_ADDRESS).hope(_flipper); Flipper(_flipper).dent(_bidId, _amount, bid); } function closeBid(uint _bidId, address _flipper, address _joinAddr) public { bytes32 ilk = Join(_joinAddr).ilk(); Flipper(_flipper).deal(_bidId); uint amount = Vat(VAT_ADDRESS).gem(ilk, address(this)); Vat(VAT_ADDRESS).hope(_joinAddr); Gem(_joinAddr).exit(msg.sender, amount); } function exitCollateral(address _joinAddr) public { bytes32 ilk = Join(_joinAddr).ilk(); uint amount = Vat(VAT_ADDRESS).gem(ilk, address(this)); Vat(VAT_ADDRESS).hope(_joinAddr); Gem(_joinAddr).exit(msg.sender, amount); } function exitDai() public { uint amount = Vat(VAT_ADDRESS).dai(address(this)) / (10**27); Vat(VAT_ADDRESS).hope(DAI_JOIN); Gem(DAI_JOIN).exit(msg.sender, amount); } function withdrawToken(address _token) public { uint balance = ERC20(_token).balanceOf(address(this)); ERC20(_token).transfer(msg.sender, balance); } function withdrawEth() public { uint balance = address(this).balance; msg.sender.transfer(balance); } function joinDai(uint _amount) internal { uint amountInVat = Vat(VAT_ADDRESS).dai(address(this)) / (10**27); if (_amount > amountInVat) { uint amountDiff = (_amount - amountInVat) + 1; ERC20(DAI_ADDRESS).transferFrom(msg.sender, address(this), amountDiff); ERC20(DAI_ADDRESS).approve(DAI_JOIN, amountDiff); Join(DAI_JOIN).join(address(this), amountDiff); } } } abstract contract IMCDSubscriptions { function unsubscribe(uint256 _cdpId) external virtual ; function subscribersPos(uint256 _cdpId) external virtual returns (uint256, bool); } abstract contract GemLike { function approve(address, uint256) public virtual; function transfer(address, uint256) public virtual; function transferFrom(address, address, uint256) public virtual; function deposit() public virtual payable; function withdraw(uint256) public virtual; } abstract contract ManagerLike { function cdpCan(address, uint256, address) public virtual view returns (uint256); function ilks(uint256) public virtual view returns (bytes32); function owns(uint256) public virtual view returns (address); function urns(uint256) public virtual view returns (address); function vat() public virtual view returns (address); function open(bytes32, address) public virtual returns (uint256); function give(uint256, address) public virtual; function cdpAllow(uint256, address, uint256) public virtual; function urnAllow(address, uint256) public virtual; function frob(uint256, int256, int256) public virtual; function flux(uint256, address, uint256) public virtual; function move(uint256, address, uint256) public virtual; function exit(address, uint256, address, uint256) public virtual; function quit(uint256, address) public virtual; function enter(address, uint256) public virtual; function shift(uint256, uint256) public virtual; } abstract contract VatLike { function can(address, address) public virtual view returns (uint256); function ilks(bytes32) public virtual view returns (uint256, uint256, uint256, uint256, uint256); function dai(address) public virtual view returns (uint256); function urns(bytes32, address) public virtual view returns (uint256, uint256); function frob(bytes32, address, address, address, int256, int256) public virtual; function hope(address) public virtual; function move(address, address, uint256) public virtual; } abstract contract GemJoinLike { function dec() public virtual returns (uint256); function gem() public virtual returns (GemLike); function join(address, uint256) public virtual payable; function exit(address, uint256) public virtual; } abstract contract GNTJoinLike { function bags(address) public virtual view returns (address); function make(address) public virtual returns (address); } abstract contract DaiJoinLike { function vat() public virtual returns (VatLike); function dai() public virtual returns (GemLike); function join(address, uint256) public virtual payable; function exit(address, uint256) public virtual; } abstract contract HopeLike { function hope(address) public virtual; function nope(address) public virtual; } abstract contract ProxyRegistryInterface { function build(address) public virtual returns (address); } abstract contract EndLike { function fix(bytes32) public virtual view returns (uint256); function cash(bytes32, uint256) public virtual; function free(bytes32) public virtual; function pack(uint256) public virtual; function skim(bytes32, address) public virtual; } abstract contract JugLike { function drip(bytes32) public virtual returns (uint256); } abstract contract PotLike { function pie(address) public virtual view returns (uint256); function drip() public virtual returns (uint256); function join(uint256) public virtual; function exit(uint256) public virtual; } abstract contract ProxyRegistryLike { function proxies(address) public virtual view returns (address); function build(address) public virtual returns (address); } abstract contract ProxyLike { function owner() public virtual view returns (address); } contract Common { uint256 constant RAY = 10**27; // Internal functions function mul(uint256 x, uint256 y) internal pure returns (uint256 z) { require(y == 0 || (z = x * y) / y == x, "mul-overflow"); } // Public functions // solhint-disable-next-line func-name-mixedcase function daiJoin_join(address apt, address urn, uint256 wad) public { // Gets DAI from the user's wallet DaiJoinLike(apt).dai().transferFrom(msg.sender, address(this), wad); // Approves adapter to take the DAI amount DaiJoinLike(apt).dai().approve(apt, wad); // Joins DAI into the vat DaiJoinLike(apt).join(urn, wad); } } contract MCDCreateProxyActions is Common { // Internal functions function sub(uint256 x, uint256 y) internal pure returns (uint256 z) { require((z = x - y) <= x, "sub-overflow"); } function toInt(uint256 x) internal pure returns (int256 y) { y = int256(x); require(y >= 0, "int-overflow"); } function toRad(uint256 wad) internal pure returns (uint256 rad) { rad = mul(wad, 10**27); } function convertTo18(address gemJoin, uint256 amt) internal returns (uint256 wad) { // For those collaterals that have less than 18 decimals precision we need to do the conversion before passing to frob function // Adapters will automatically handle the difference of precision wad = mul(amt, 10**(18 - GemJoinLike(gemJoin).dec())); } function _getDrawDart(address vat, address jug, address urn, bytes32 ilk, uint256 wad) internal returns (int256 dart) { // Updates stability fee rate uint256 rate = JugLike(jug).drip(ilk); // Gets DAI balance of the urn in the vat uint256 dai = VatLike(vat).dai(urn); // If there was already enough DAI in the vat balance, just exits it without adding more debt if (dai < mul(wad, RAY)) { // Calculates the needed dart so together with the existing dai in the vat is enough to exit wad amount of DAI tokens dart = toInt(sub(mul(wad, RAY), dai) / rate); // This is neeeded due lack of precision. It might need to sum an extra dart wei (for the given DAI wad amount) dart = mul(uint256(dart), rate) < mul(wad, RAY) ? dart + 1 : dart; } } function _getWipeDart(address vat, uint256 dai, address urn, bytes32 ilk) internal view returns (int256 dart) { // Gets actual rate from the vat (, uint256 rate, , , ) = VatLike(vat).ilks(ilk); // Gets actual art value of the urn (, uint256 art) = VatLike(vat).urns(ilk, urn); // Uses the whole dai balance in the vat to reduce the debt dart = toInt(dai / rate); // Checks the calculated dart is not higher than urn.art (total debt), otherwise uses its value dart = uint256(dart) <= art ? -dart : -toInt(art); } function _getWipeAllWad(address vat, address usr, address urn, bytes32 ilk) internal view returns (uint256 wad) { // Gets actual rate from the vat (, uint256 rate, , , ) = VatLike(vat).ilks(ilk); // Gets actual art value of the urn (, uint256 art) = VatLike(vat).urns(ilk, urn); // Gets actual dai amount in the urn uint256 dai = VatLike(vat).dai(usr); uint256 rad = sub(mul(art, rate), dai); wad = rad / RAY; // If the rad precision has some dust, it will need to request for 1 extra wad wei wad = mul(wad, RAY) < rad ? wad + 1 : wad; } // Public functions function transfer(address gem, address dst, uint256 wad) public { GemLike(gem).transfer(dst, wad); } // solhint-disable-next-line func-name-mixedcase function ethJoin_join(address apt, address urn) public payable { // Wraps ETH in WETH GemJoinLike(apt).gem().deposit{value: msg.value}(); // Approves adapter to take the WETH amount GemJoinLike(apt).gem().approve(address(apt), msg.value); // Joins WETH collateral into the vat GemJoinLike(apt).join(urn, msg.value); } // solhint-disable-next-line func-name-mixedcase function gemJoin_join(address apt, address urn, uint256 wad, bool transferFrom) public { // Only executes for tokens that have approval/transferFrom implementation if (transferFrom) { // Gets token from the user's wallet GemJoinLike(apt).gem().transferFrom(msg.sender, address(this), wad); // Approves adapter to take the token amount GemJoinLike(apt).gem().approve(apt, 0); GemJoinLike(apt).gem().approve(apt, wad); } // Joins token collateral into the vat GemJoinLike(apt).join(urn, wad); } function hope(address obj, address usr) public { HopeLike(obj).hope(usr); } function nope(address obj, address usr) public { HopeLike(obj).nope(usr); } function open(address manager, bytes32 ilk, address usr) public returns (uint256 cdp) { cdp = ManagerLike(manager).open(ilk, usr); } function give(address manager, uint256 cdp, address usr) public { ManagerLike(manager).give(cdp, usr); } function move(address manager, uint256 cdp, address dst, uint256 rad) public { ManagerLike(manager).move(cdp, dst, rad); } function frob(address manager, uint256 cdp, int256 dink, int256 dart) public { ManagerLike(manager).frob(cdp, dink, dart); } function lockETH(address manager, address ethJoin, uint256 cdp) public payable { // Receives ETH amount, converts it to WETH and joins it into the vat ethJoin_join(ethJoin, address(this)); // Locks WETH amount into the CDP VatLike(ManagerLike(manager).vat()).frob( ManagerLike(manager).ilks(cdp), ManagerLike(manager).urns(cdp), address(this), address(this), toInt(msg.value), 0 ); } function lockGem(address manager, address gemJoin, uint256 cdp, uint256 wad, bool transferFrom) public { // Takes token amount from user's wallet and joins into the vat gemJoin_join(gemJoin, address(this), wad, transferFrom); // Locks token amount into the CDP VatLike(ManagerLike(manager).vat()).frob( ManagerLike(manager).ilks(cdp), ManagerLike(manager).urns(cdp), address(this), address(this), toInt(convertTo18(gemJoin, wad)), 0 ); } function draw(address manager, address jug, address daiJoin, uint256 cdp, uint256 wad) public { address urn = ManagerLike(manager).urns(cdp); address vat = ManagerLike(manager).vat(); bytes32 ilk = ManagerLike(manager).ilks(cdp); // Generates debt in the CDP frob(manager, cdp, 0, _getDrawDart(vat, jug, urn, ilk, wad)); // Moves the DAI amount (balance in the vat in rad) to proxy's address move(manager, cdp, address(this), toRad(wad)); // Allows adapter to access to proxy's DAI balance in the vat if (VatLike(vat).can(address(this), address(daiJoin)) == 0) { VatLike(vat).hope(daiJoin); } // Exits DAI to the user's wallet as a token DaiJoinLike(daiJoin).exit(msg.sender, wad); } function lockETHAndDraw( address manager, address jug, address ethJoin, address daiJoin, uint256 cdp, uint256 wadD ) public payable { address urn = ManagerLike(manager).urns(cdp); address vat = ManagerLike(manager).vat(); bytes32 ilk = ManagerLike(manager).ilks(cdp); // Receives ETH amount, converts it to WETH and joins it into the vat ethJoin_join(ethJoin, urn); // Locks WETH amount into the CDP and generates debt frob(manager, cdp, toInt(msg.value), _getDrawDart(vat, jug, urn, ilk, wadD)); // Moves the DAI amount (balance in the vat in rad) to proxy's address move(manager, cdp, address(this), toRad(wadD)); // Allows adapter to access to proxy's DAI balance in the vat if (VatLike(vat).can(address(this), address(daiJoin)) == 0) { VatLike(vat).hope(daiJoin); } // Exits DAI to the user's wallet as a token DaiJoinLike(daiJoin).exit(msg.sender, wadD); } function openLockETHAndDraw( address manager, address jug, address ethJoin, address daiJoin, bytes32 ilk, uint256 wadD, address owner ) public payable returns (uint256 cdp) { cdp = open(manager, ilk, address(this)); lockETHAndDraw(manager, jug, ethJoin, daiJoin, cdp, wadD); give(manager, cdp, owner); } function lockGemAndDraw( address manager, address jug, address gemJoin, address daiJoin, uint256 cdp, uint256 wadC, uint256 wadD, bool transferFrom ) public { address urn = ManagerLike(manager).urns(cdp); address vat = ManagerLike(manager).vat(); bytes32 ilk = ManagerLike(manager).ilks(cdp); // Takes token amount from user's wallet and joins into the vat gemJoin_join(gemJoin, urn, wadC, transferFrom); // Locks token amount into the CDP and generates debt frob( manager, cdp, toInt(convertTo18(gemJoin, wadC)), _getDrawDart(vat, jug, urn, ilk, wadD) ); // Moves the DAI amount (balance in the vat in rad) to proxy's address move(manager, cdp, address(this), toRad(wadD)); // Allows adapter to access to proxy's DAI balance in the vat if (VatLike(vat).can(address(this), address(daiJoin)) == 0) { VatLike(vat).hope(daiJoin); } // Exits DAI to the user's wallet as a token DaiJoinLike(daiJoin).exit(msg.sender, wadD); } function openLockGemAndDraw( address manager, address jug, address gemJoin, address daiJoin, bytes32 ilk, uint256 wadC, uint256 wadD, bool transferFrom, address owner ) public returns (uint256 cdp) { cdp = open(manager, ilk, address(this)); lockGemAndDraw(manager, jug, gemJoin, daiJoin, cdp, wadC, wadD, transferFrom); give(manager, cdp, owner); } } contract MCDCreateTaker { using SafeERC20 for ERC20; address payable public constant MCD_CREATE_FLASH_LOAN = 0x78aF7A2Ee6C2240c748aDdc42aBc9A693559dcaF; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); // solhint-disable-next-line const-name-snakecase Manager public constant manager = Manager(0x5ef30b9986345249bc32d8928B7ee64DE9435E39); // solhint-disable-next-line const-name-snakecase DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); struct CreateData { uint collAmount; uint daiAmount; address joinAddr; } function openWithLoan( DFSExchangeData.ExchangeData memory _exchangeData, CreateData memory _createData ) public payable { MCD_CREATE_FLASH_LOAN.transfer(msg.value); //0x fee if (!isEthJoinAddr(_createData.joinAddr)) { ERC20(getCollateralAddr(_createData.joinAddr)).safeTransferFrom(msg.sender, address(this), _createData.collAmount); ERC20(getCollateralAddr(_createData.joinAddr)).safeTransfer(MCD_CREATE_FLASH_LOAN, _createData.collAmount); } bytes memory packedData = _packData(_createData, _exchangeData); bytes memory paramsData = abi.encode(address(this), packedData); lendingPool.flashLoan(MCD_CREATE_FLASH_LOAN, DAI_ADDRESS, _createData.daiAmount, paramsData); logger.Log(address(this), msg.sender, "MCDCreate", abi.encode(manager.last(address(this)), _createData.collAmount, _createData.daiAmount)); } function getCollateralAddr(address _joinAddr) internal view returns (address) { return address(Join(_joinAddr).gem()); } /// @notice Checks if the join address is one of the Ether coll. types /// @param _joinAddr Join address to check function isEthJoinAddr(address _joinAddr) internal view returns (bool) { // if it's dai_join_addr don't check gem() it will fail if (_joinAddr == 0x9759A6Ac90977b93B58547b4A71c78317f391A28) return false; // if coll is weth it's and eth type coll if (address(Join(_joinAddr).gem()) == 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2) { return true; } return false; } function _packData( CreateData memory _createData, DFSExchangeData.ExchangeData memory _exchangeData ) internal pure returns (bytes memory) { return abi.encode(_createData, _exchangeData); } } contract MCDSaverProxyHelper is DSMath { /// @notice Returns a normalized debt _amount based on the current rate /// @param _amount Amount of dai to be normalized /// @param _rate Current rate of the stability fee /// @param _daiVatBalance Balance od Dai in the Vat for that CDP function normalizeDrawAmount(uint _amount, uint _rate, uint _daiVatBalance) internal pure returns (int dart) { if (_daiVatBalance < mul(_amount, RAY)) { dart = toPositiveInt(sub(mul(_amount, RAY), _daiVatBalance) / _rate); dart = mul(uint(dart), _rate) < mul(_amount, RAY) ? dart + 1 : dart; } } /// @notice Converts a number to Rad percision /// @param _wad The input number in wad percision function toRad(uint _wad) internal pure returns (uint) { return mul(_wad, 10 ** 27); } /// @notice Converts a number to 18 decimal percision /// @param _joinAddr Join address of the collateral /// @param _amount Number to be converted function convertTo18(address _joinAddr, uint256 _amount) internal view returns (uint256) { return mul(_amount, 10 ** (18 - Join(_joinAddr).dec())); } /// @notice Converts a uint to int and checks if positive /// @param _x Number to be converted function toPositiveInt(uint _x) internal pure returns (int y) { y = int(_x); require(y >= 0, "int-overflow"); } /// @notice Gets Dai amount in Vat which can be added to Cdp /// @param _vat Address of Vat contract /// @param _urn Urn of the Cdp /// @param _ilk Ilk of the Cdp function normalizePaybackAmount(address _vat, address _urn, bytes32 _ilk) internal view returns (int amount) { uint dai = Vat(_vat).dai(_urn); (, uint rate,,,) = Vat(_vat).ilks(_ilk); (, uint art) = Vat(_vat).urns(_ilk, _urn); amount = toPositiveInt(dai / rate); amount = uint(amount) <= art ? - amount : - toPositiveInt(art); } /// @notice Gets the whole debt of the CDP /// @param _vat Address of Vat contract /// @param _usr Address of the Dai holder /// @param _urn Urn of the Cdp /// @param _ilk Ilk of the Cdp function getAllDebt(address _vat, address _usr, address _urn, bytes32 _ilk) internal view returns (uint daiAmount) { (, uint rate,,,) = Vat(_vat).ilks(_ilk); (, uint art) = Vat(_vat).urns(_ilk, _urn); uint dai = Vat(_vat).dai(_usr); uint rad = sub(mul(art, rate), dai); daiAmount = rad / RAY; daiAmount = mul(daiAmount, RAY) < rad ? daiAmount + 1 : daiAmount; } /// @notice Gets the token address from the Join contract /// @param _joinAddr Address of the Join contract function getCollateralAddr(address _joinAddr) internal view returns (address) { return address(Join(_joinAddr).gem()); } /// @notice Checks if the join address is one of the Ether coll. types /// @param _joinAddr Join address to check function isEthJoinAddr(address _joinAddr) internal view returns (bool) { // if it's dai_join_addr don't check gem() it will fail if (_joinAddr == 0x9759A6Ac90977b93B58547b4A71c78317f391A28) return false; // if coll is weth it's and eth type coll if (address(Join(_joinAddr).gem()) == 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2) { return true; } return false; } /// @notice Gets CDP info (collateral, debt) /// @param _manager Manager contract /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP function getCdpInfo(Manager _manager, uint _cdpId, bytes32 _ilk) public view returns (uint, uint) { address vat = _manager.vat(); address urn = _manager.urns(_cdpId); (uint collateral, uint debt) = Vat(vat).urns(_ilk, urn); (,uint rate,,,) = Vat(vat).ilks(_ilk); return (collateral, rmul(debt, rate)); } /// @notice Address that owns the DSProxy that owns the CDP /// @param _manager Manager contract /// @param _cdpId Id of the CDP function getOwner(Manager _manager, uint _cdpId) public view returns (address) { DSProxy proxy = DSProxy(uint160(_manager.owns(_cdpId))); return proxy.owner(); } } abstract contract ProtocolInterface { function deposit(address _user, uint256 _amount) public virtual; function withdraw(address _user, uint256 _amount) public virtual; } contract SavingsLogger { event Deposit(address indexed sender, uint8 protocol, uint256 amount); event Withdraw(address indexed sender, uint8 protocol, uint256 amount); event Swap(address indexed sender, uint8 fromProtocol, uint8 toProtocol, uint256 amount); function logDeposit(address _sender, uint8 _protocol, uint256 _amount) external { emit Deposit(_sender, _protocol, _amount); } function logWithdraw(address _sender, uint8 _protocol, uint256 _amount) external { emit Withdraw(_sender, _protocol, _amount); } function logSwap(address _sender, uint8 _protocolFrom, uint8 _protocolTo, uint256 _amount) external { emit Swap(_sender, _protocolFrom, _protocolTo, _amount); } } contract AaveSavingsProtocol is ProtocolInterface, DSAuth { address public constant ADAI_ADDRESS = 0xfC1E690f61EFd961294b3e1Ce3313fBD8aa4f85d; address public constant AAVE_LENDING_POOL = 0x398eC7346DcD622eDc5ae82352F02bE94C62d119; address public constant AAVE_LENDING_POOL_CORE = 0x3dfd23A6c5E8BbcFc9581d2E864a68feb6a076d3; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; function deposit(address _user, uint _amount) public override { require(msg.sender == _user); // get dai from user require(ERC20(DAI_ADDRESS).transferFrom(_user, address(this), _amount)); ERC20(DAI_ADDRESS).approve(AAVE_LENDING_POOL_CORE, uint(-1)); ILendingPool(AAVE_LENDING_POOL).deposit(DAI_ADDRESS, _amount, 0); ERC20(ADAI_ADDRESS).transfer(_user, ERC20(ADAI_ADDRESS).balanceOf(address(this))); } function withdraw(address _user, uint _amount) public override { require(msg.sender == _user); require(ERC20(ADAI_ADDRESS).transferFrom(_user, address(this), _amount)); IAToken(ADAI_ADDRESS).redeem(_amount); // return dai we have to user ERC20(DAI_ADDRESS).transfer(_user, _amount); } } contract CompoundSavingsProtocol { address public constant NEW_CDAI_ADDRESS = 0x5d3a536E4D6DbD6114cc1Ead35777bAB948E3643; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; CTokenInterface public constant cDaiContract = CTokenInterface(NEW_CDAI_ADDRESS); function compDeposit(address _user, uint _amount) internal { // get dai from user require(ERC20(DAI_ADDRESS).transferFrom(_user, address(this), _amount)); // mainnet only ERC20(DAI_ADDRESS).approve(NEW_CDAI_ADDRESS, uint(-1)); // mint cDai require(cDaiContract.mint(_amount) == 0, "Failed Mint"); } function compWithdraw(address _user, uint _amount) internal { // transfer all users balance to this contract require(cDaiContract.transferFrom(_user, address(this), ERC20(NEW_CDAI_ADDRESS).balanceOf(_user))); // approve cDai to compound contract cDaiContract.approve(NEW_CDAI_ADDRESS, uint(-1)); // get dai from cDai contract require(cDaiContract.redeemUnderlying(_amount) == 0, "Reedem Failed"); // return to user balance we didn't spend uint cDaiBalance = cDaiContract.balanceOf(address(this)); if (cDaiBalance > 0) { cDaiContract.transfer(_user, cDaiBalance); } // return dai we have to user ERC20(DAI_ADDRESS).transfer(_user, _amount); } } abstract contract VatLike { function can(address, address) virtual public view returns (uint); function ilks(bytes32) virtual public view returns (uint, uint, uint, uint, uint); function dai(address) virtual public view returns (uint); function urns(bytes32, address) virtual public view returns (uint, uint); function frob(bytes32, address, address, address, int, int) virtual public; function hope(address) virtual public; function move(address, address, uint) virtual public; } abstract contract PotLike { function pie(address) virtual public view returns (uint); function drip() virtual public returns (uint); function join(uint) virtual public; function exit(uint) virtual public; } abstract contract GemLike { function approve(address, uint) virtual public; function transfer(address, uint) virtual public; function transferFrom(address, address, uint) virtual public; function deposit() virtual public payable; function withdraw(uint) virtual public; } abstract contract DaiJoinLike { function vat() virtual public returns (VatLike); function dai() virtual public returns (GemLike); function join(address, uint) virtual public payable; function exit(address, uint) virtual public; } contract DSRSavingsProtocol is DSMath { // Mainnet address public constant POT_ADDRESS = 0x197E90f9FAD81970bA7976f33CbD77088E5D7cf7; address public constant DAI_JOIN_ADDRESS = 0x9759A6Ac90977b93B58547b4A71c78317f391A28; function dsrDeposit(uint _amount, bool _fromUser) internal { VatLike vat = DaiJoinLike(DAI_JOIN_ADDRESS).vat(); uint chi = PotLike(POT_ADDRESS).drip(); daiJoin_join(DAI_JOIN_ADDRESS, address(this), _amount, _fromUser); if (vat.can(address(this), address(POT_ADDRESS)) == 0) { vat.hope(POT_ADDRESS); } PotLike(POT_ADDRESS).join(mul(_amount, RAY) / chi); } function dsrWithdraw(uint _amount, bool _toUser) internal { VatLike vat = DaiJoinLike(DAI_JOIN_ADDRESS).vat(); uint chi = PotLike(POT_ADDRESS).drip(); uint pie = mul(_amount, RAY) / chi; PotLike(POT_ADDRESS).exit(pie); uint balance = DaiJoinLike(DAI_JOIN_ADDRESS).vat().dai(address(this)); if (vat.can(address(this), address(DAI_JOIN_ADDRESS)) == 0) { vat.hope(DAI_JOIN_ADDRESS); } address to; if (_toUser) { to = msg.sender; } else { to = address(this); } if (_amount == uint(-1)) { DaiJoinLike(DAI_JOIN_ADDRESS).exit(to, mul(chi, pie) / RAY); } else { DaiJoinLike(DAI_JOIN_ADDRESS).exit( to, balance >= mul(_amount, RAY) ? _amount : balance / RAY ); } } function daiJoin_join(address apt, address urn, uint wad, bool _fromUser) internal { if (_fromUser) { DaiJoinLike(apt).dai().transferFrom(msg.sender, address(this), wad); } DaiJoinLike(apt).dai().approve(apt, wad); DaiJoinLike(apt).join(urn, wad); } } contract DydxSavingsProtocol is ProtocolInterface, DSAuth { address public constant SOLO_MARGIN_ADDRESS = 0x1E0447b19BB6EcFdAe1e4AE1694b0C3659614e4e; ISoloMargin public soloMargin; address public savingsProxy; uint daiMarketId = 3; constructor() public { soloMargin = ISoloMargin(SOLO_MARGIN_ADDRESS); } function addSavingsProxy(address _savingsProxy) public auth { savingsProxy = _savingsProxy; } function deposit(address _user, uint _amount) public override { require(msg.sender == _user); Account.Info[] memory accounts = new Account.Info[](1); accounts[0] = getAccount(_user, 0); Actions.ActionArgs[] memory actions = new Actions.ActionArgs[](1); Types.AssetAmount memory amount = Types.AssetAmount({ sign: true, denomination: Types.AssetDenomination.Wei, ref: Types.AssetReference.Delta, value: _amount }); actions[0] = Actions.ActionArgs({ actionType: Actions.ActionType.Deposit, accountId: 0, amount: amount, primaryMarketId: daiMarketId, otherAddress: _user, secondaryMarketId: 0, //not used otherAccountId: 0, //not used data: "" //not used }); soloMargin.operate(accounts, actions); } function withdraw(address _user, uint _amount) public override { require(msg.sender == _user); Account.Info[] memory accounts = new Account.Info[](1); accounts[0] = getAccount(_user, 0); Actions.ActionArgs[] memory actions = new Actions.ActionArgs[](1); Types.AssetAmount memory amount = Types.AssetAmount({ sign: false, denomination: Types.AssetDenomination.Wei, ref: Types.AssetReference.Delta, value: _amount }); actions[0] = Actions.ActionArgs({ actionType: Actions.ActionType.Withdraw, accountId: 0, amount: amount, primaryMarketId: daiMarketId, otherAddress: _user, secondaryMarketId: 0, //not used otherAccountId: 0, //not used data: "" //not used }); soloMargin.operate(accounts, actions); } function getWeiBalance(address _user, uint _index) public view returns(Types.Wei memory) { Types.Wei[] memory weiBalances; (,,weiBalances) = soloMargin.getAccountBalances(getAccount(_user, _index)); return weiBalances[daiMarketId]; } function getParBalance(address _user, uint _index) public view returns(Types.Par memory) { Types.Par[] memory parBalances; (,parBalances,) = soloMargin.getAccountBalances(getAccount(_user, _index)); return parBalances[daiMarketId]; } function getAccount(address _user, uint _index) public pure returns(Account.Info memory) { Account.Info memory account = Account.Info({ owner: _user, number: _index }); return account; } } abstract contract ISoloMargin { struct OperatorArg { address operator; bool trusted; } function operate( Account.Info[] memory accounts, Actions.ActionArgs[] memory actions ) public virtual; function getAccountBalances( Account.Info memory account ) public view virtual returns ( address[] memory, Types.Par[] memory, Types.Wei[] memory ); function setOperators( OperatorArg[] memory args ) public virtual; function getNumMarkets() public view virtual returns (uint256); function getMarketTokenAddress(uint256 marketId) public view virtual returns (address); } library Account { // ============ Enums ============ /* * Most-recently-cached account status. * * Normal: Can only be liquidated if the account values are violating the global margin-ratio. * Liquid: Can be liquidated no matter the account values. * Can be vaporized if there are no more positive account values. * Vapor: Has only negative (or zeroed) account values. Can be vaporized. * */ enum Status { Normal, Liquid, Vapor } // ============ Structs ============ // Represents the unique key that specifies an account struct Info { address owner; // The address that owns the account uint256 number; // A nonce that allows a single address to control many accounts } // The complete storage for any account struct Storage { mapping (uint256 => Types.Par) balances; // Mapping from marketId to principal Status status; } // ============ Library Functions ============ function equals( Info memory a, Info memory b ) internal pure returns (bool) { return a.owner == b.owner && a.number == b.number; } } library Actions { // ============ Constants ============ bytes32 constant FILE = "Actions"; // ============ Enums ============ enum ActionType { Deposit, // supply tokens Withdraw, // borrow tokens Transfer, // transfer balance between accounts Buy, // buy an amount of some token (externally) Sell, // sell an amount of some token (externally) Trade, // trade tokens against another account Liquidate, // liquidate an undercollateralized or expiring account Vaporize, // use excess tokens to zero-out a completely negative account Call // send arbitrary data to an address } enum AccountLayout { OnePrimary, TwoPrimary, PrimaryAndSecondary } enum MarketLayout { ZeroMarkets, OneMarket, TwoMarkets } // ============ Structs ============ /* * Arguments that are passed to Solo in an ordered list as part of a single operation. * Each ActionArgs has an actionType which specifies which action struct that this data will be * parsed into before being processed. */ struct ActionArgs { ActionType actionType; uint256 accountId; Types.AssetAmount amount; uint256 primaryMarketId; uint256 secondaryMarketId; address otherAddress; uint256 otherAccountId; bytes data; } // ============ Action Types ============ /* * Moves tokens from an address to Solo. Can either repay a borrow or provide additional supply. */ struct DepositArgs { Types.AssetAmount amount; Account.Info account; uint256 market; address from; } /* * Moves tokens from Solo to another address. Can either borrow tokens or reduce the amount * previously supplied. */ struct WithdrawArgs { Types.AssetAmount amount; Account.Info account; uint256 market; address to; } /* * Transfers balance between two accounts. The msg.sender must be an operator for both accounts. * The amount field applies to accountOne. * This action does not require any token movement since the trade is done internally to Solo. */ struct TransferArgs { Types.AssetAmount amount; Account.Info accountOne; Account.Info accountTwo; uint256 market; } /* * Acquires a certain amount of tokens by spending other tokens. Sends takerMarket tokens to the * specified exchangeWrapper contract and expects makerMarket tokens in return. The amount field * applies to the makerMarket. */ struct BuyArgs { Types.AssetAmount amount; Account.Info account; uint256 makerMarket; uint256 takerMarket; address exchangeWrapper; bytes orderData; } /* * Spends a certain amount of tokens to acquire other tokens. Sends takerMarket tokens to the * specified exchangeWrapper and expects makerMarket tokens in return. The amount field applies * to the takerMarket. */ struct SellArgs { Types.AssetAmount amount; Account.Info account; uint256 takerMarket; uint256 makerMarket; address exchangeWrapper; bytes orderData; } /* * Trades balances between two accounts using any external contract that implements the * AutoTrader interface. The AutoTrader contract must be an operator for the makerAccount (for * which it is trading on-behalf-of). The amount field applies to the makerAccount and the * inputMarket. This proposed change to the makerAccount is passed to the AutoTrader which will * quote a change for the makerAccount in the outputMarket (or will disallow the trade). * This action does not require any token movement since the trade is done internally to Solo. */ struct TradeArgs { Types.AssetAmount amount; Account.Info takerAccount; Account.Info makerAccount; uint256 inputMarket; uint256 outputMarket; address autoTrader; bytes tradeData; } /* * Each account must maintain a certain margin-ratio (specified globally). If the account falls * below this margin-ratio, it can be liquidated by any other account. This allows anyone else * (arbitrageurs) to repay any borrowed asset (owedMarket) of the liquidating account in * exchange for any collateral asset (heldMarket) of the liquidAccount. The ratio is determined * by the price ratio (given by the oracles) plus a spread (specified globally). Liquidating an * account also sets a flag on the account that the account is being liquidated. This allows * anyone to continue liquidating the account until there are no more borrows being taken by the * liquidating account. Liquidators do not have to liquidate the entire account all at once but * can liquidate as much as they choose. The liquidating flag allows liquidators to continue * liquidating the account even if it becomes collateralized through partial liquidation or * price movement. */ struct LiquidateArgs { Types.AssetAmount amount; Account.Info solidAccount; Account.Info liquidAccount; uint256 owedMarket; uint256 heldMarket; } /* * Similar to liquidate, but vaporAccounts are accounts that have only negative balances * remaining. The arbitrageur pays back the negative asset (owedMarket) of the vaporAccount in * exchange for a collateral asset (heldMarket) at a favorable spread. However, since the * liquidAccount has no collateral assets, the collateral must come from Solo's excess tokens. */ struct VaporizeArgs { Types.AssetAmount amount; Account.Info solidAccount; Account.Info vaporAccount; uint256 owedMarket; uint256 heldMarket; } /* * Passes arbitrary bytes of data to an external contract that implements the Callee interface. * Does not change any asset amounts. This function may be useful for setting certain variables * on layer-two contracts for certain accounts without having to make a separate Ethereum * transaction for doing so. Also, the second-layer contracts can ensure that the call is coming * from an operator of the particular account. */ struct CallArgs { Account.Info account; address callee; bytes data; } // ============ Helper Functions ============ function getMarketLayout( ActionType actionType ) internal pure returns (MarketLayout) { if ( actionType == Actions.ActionType.Deposit || actionType == Actions.ActionType.Withdraw || actionType == Actions.ActionType.Transfer ) { return MarketLayout.OneMarket; } else if (actionType == Actions.ActionType.Call) { return MarketLayout.ZeroMarkets; } return MarketLayout.TwoMarkets; } function getAccountLayout( ActionType actionType ) internal pure returns (AccountLayout) { if ( actionType == Actions.ActionType.Transfer || actionType == Actions.ActionType.Trade ) { return AccountLayout.TwoPrimary; } else if ( actionType == Actions.ActionType.Liquidate || actionType == Actions.ActionType.Vaporize ) { return AccountLayout.PrimaryAndSecondary; } return AccountLayout.OnePrimary; } // ============ Parsing Functions ============ function parseDepositArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (DepositArgs memory) { assert(args.actionType == ActionType.Deposit); return DepositArgs({ amount: args.amount, account: accounts[args.accountId], market: args.primaryMarketId, from: args.otherAddress }); } function parseWithdrawArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (WithdrawArgs memory) { assert(args.actionType == ActionType.Withdraw); return WithdrawArgs({ amount: args.amount, account: accounts[args.accountId], market: args.primaryMarketId, to: args.otherAddress }); } function parseTransferArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (TransferArgs memory) { assert(args.actionType == ActionType.Transfer); return TransferArgs({ amount: args.amount, accountOne: accounts[args.accountId], accountTwo: accounts[args.otherAccountId], market: args.primaryMarketId }); } function parseBuyArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (BuyArgs memory) { assert(args.actionType == ActionType.Buy); return BuyArgs({ amount: args.amount, account: accounts[args.accountId], makerMarket: args.primaryMarketId, takerMarket: args.secondaryMarketId, exchangeWrapper: args.otherAddress, orderData: args.data }); } function parseSellArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (SellArgs memory) { assert(args.actionType == ActionType.Sell); return SellArgs({ amount: args.amount, account: accounts[args.accountId], takerMarket: args.primaryMarketId, makerMarket: args.secondaryMarketId, exchangeWrapper: args.otherAddress, orderData: args.data }); } function parseTradeArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (TradeArgs memory) { assert(args.actionType == ActionType.Trade); return TradeArgs({ amount: args.amount, takerAccount: accounts[args.accountId], makerAccount: accounts[args.otherAccountId], inputMarket: args.primaryMarketId, outputMarket: args.secondaryMarketId, autoTrader: args.otherAddress, tradeData: args.data }); } function parseLiquidateArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (LiquidateArgs memory) { assert(args.actionType == ActionType.Liquidate); return LiquidateArgs({ amount: args.amount, solidAccount: accounts[args.accountId], liquidAccount: accounts[args.otherAccountId], owedMarket: args.primaryMarketId, heldMarket: args.secondaryMarketId }); } function parseVaporizeArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (VaporizeArgs memory) { assert(args.actionType == ActionType.Vaporize); return VaporizeArgs({ amount: args.amount, solidAccount: accounts[args.accountId], vaporAccount: accounts[args.otherAccountId], owedMarket: args.primaryMarketId, heldMarket: args.secondaryMarketId }); } function parseCallArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (CallArgs memory) { assert(args.actionType == ActionType.Call); return CallArgs({ account: accounts[args.accountId], callee: args.otherAddress, data: args.data }); } } library Math { using SafeMath for uint256; // ============ Constants ============ bytes32 constant FILE = "Math"; // ============ Library Functions ============ /* * Return target * (numerator / denominator). */ function getPartial( uint256 target, uint256 numerator, uint256 denominator ) internal pure returns (uint256) { return target.mul(numerator).div(denominator); } /* * Return target * (numerator / denominator), but rounded up. */ function getPartialRoundUp( uint256 target, uint256 numerator, uint256 denominator ) internal pure returns (uint256) { if (target == 0 || numerator == 0) { // SafeMath will check for zero denominator return SafeMath.div(0, denominator); } return target.mul(numerator).sub(1).div(denominator).add(1); } function to128( uint256 number ) internal pure returns (uint128) { uint128 result = uint128(number); Require.that( result == number, FILE, "Unsafe cast to uint128" ); return result; } function to96( uint256 number ) internal pure returns (uint96) { uint96 result = uint96(number); Require.that( result == number, FILE, "Unsafe cast to uint96" ); return result; } function to32( uint256 number ) internal pure returns (uint32) { uint32 result = uint32(number); Require.that( result == number, FILE, "Unsafe cast to uint32" ); return result; } function min( uint256 a, uint256 b ) internal pure returns (uint256) { return a < b ? a : b; } function max( uint256 a, uint256 b ) internal pure returns (uint256) { return a > b ? a : b; } } library Require { // ============ Constants ============ uint256 constant ASCII_ZERO = 48; // '0' uint256 constant ASCII_RELATIVE_ZERO = 87; // 'a' - 10 uint256 constant ASCII_LOWER_EX = 120; // 'x' bytes2 constant COLON = 0x3a20; // ': ' bytes2 constant COMMA = 0x2c20; // ', ' bytes2 constant LPAREN = 0x203c; // ' <' byte constant RPAREN = 0x3e; // '>' uint256 constant FOUR_BIT_MASK = 0xf; // ============ Library Functions ============ function that( bool must, bytes32 file, bytes32 reason ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason) ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, uint256 payloadA ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), RPAREN ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, uint256 payloadA, uint256 payloadB ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), COMMA, stringify(payloadB), RPAREN ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, address payloadA ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), RPAREN ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, address payloadA, uint256 payloadB ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), COMMA, stringify(payloadB), RPAREN ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, address payloadA, uint256 payloadB, uint256 payloadC ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), COMMA, stringify(payloadB), COMMA, stringify(payloadC), RPAREN ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, bytes32 payloadA ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), RPAREN ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, bytes32 payloadA, uint256 payloadB, uint256 payloadC ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), COMMA, stringify(payloadB), COMMA, stringify(payloadC), RPAREN ) ) ); } } // ============ Private Functions ============ function stringifyTruncated( bytes32 input ) private pure returns (bytes memory) { // put the input bytes into the result bytes memory result = abi.encodePacked(input); // determine the length of the input by finding the location of the last non-zero byte for (uint256 i = 32; i > 0; ) { // reverse-for-loops with unsigned integer /* solium-disable-next-line security/no-modify-for-iter-var */ i--; // find the last non-zero byte in order to determine the length if (result[i] != 0) { uint256 length = i + 1; /* solium-disable-next-line security/no-inline-assembly */ assembly { mstore(result, length) // r.length = length; } return result; } } // all bytes are zero return new bytes(0); } function stringify( uint256 input ) private pure returns (bytes memory) { if (input == 0) { return "0"; } // get the final string length uint256 j = input; uint256 length; while (j != 0) { length++; j /= 10; } // allocate the string bytes memory bstr = new bytes(length); // populate the string starting with the least-significant character j = input; for (uint256 i = length; i > 0; ) { // reverse-for-loops with unsigned integer /* solium-disable-next-line security/no-modify-for-iter-var */ i--; // take last decimal digit bstr[i] = byte(uint8(ASCII_ZERO + (j % 10))); // remove the last decimal digit j /= 10; } return bstr; } function stringify( address input ) private pure returns (bytes memory) { uint256 z = uint256(input); // addresses are "0x" followed by 20 bytes of data which take up 2 characters each bytes memory result = new bytes(42); // populate the result with "0x" result[0] = byte(uint8(ASCII_ZERO)); result[1] = byte(uint8(ASCII_LOWER_EX)); // for each byte (starting from the lowest byte), populate the result with two characters for (uint256 i = 0; i < 20; i++) { // each byte takes two characters uint256 shift = i * 2; // populate the least-significant character result[41 - shift] = char(z & FOUR_BIT_MASK); z = z >> 4; // populate the most-significant character result[40 - shift] = char(z & FOUR_BIT_MASK); z = z >> 4; } return result; } function stringify( bytes32 input ) private pure returns (bytes memory) { uint256 z = uint256(input); // bytes32 are "0x" followed by 32 bytes of data which take up 2 characters each bytes memory result = new bytes(66); // populate the result with "0x" result[0] = byte(uint8(ASCII_ZERO)); result[1] = byte(uint8(ASCII_LOWER_EX)); // for each byte (starting from the lowest byte), populate the result with two characters for (uint256 i = 0; i < 32; i++) { // each byte takes two characters uint256 shift = i * 2; // populate the least-significant character result[65 - shift] = char(z & FOUR_BIT_MASK); z = z >> 4; // populate the most-significant character result[64 - shift] = char(z & FOUR_BIT_MASK); z = z >> 4; } return result; } function char( uint256 input ) private pure returns (byte) { // return ASCII digit (0-9) if (input < 10) { return byte(uint8(input + ASCII_ZERO)); } // return ASCII letter (a-f) return byte(uint8(input + ASCII_RELATIVE_ZERO)); } } library Types { using Math for uint256; // ============ AssetAmount ============ enum AssetDenomination { Wei, // the amount is denominated in wei Par // the amount is denominated in par } enum AssetReference { Delta, // the amount is given as a delta from the current value Target // the amount is given as an exact number to end up at } struct AssetAmount { bool sign; // true if positive AssetDenomination denomination; AssetReference ref; uint256 value; } // ============ Par (Principal Amount) ============ // Total borrow and supply values for a market struct TotalPar { uint128 borrow; uint128 supply; } // Individual principal amount for an account struct Par { bool sign; // true if positive uint128 value; } function zeroPar() internal pure returns (Par memory) { return Par({ sign: false, value: 0 }); } function sub( Par memory a, Par memory b ) internal pure returns (Par memory) { return add(a, negative(b)); } function add( Par memory a, Par memory b ) internal pure returns (Par memory) { Par memory result; if (a.sign == b.sign) { result.sign = a.sign; result.value = SafeMath.add(a.value, b.value).to128(); } else { if (a.value >= b.value) { result.sign = a.sign; result.value = SafeMath.sub(a.value, b.value).to128(); } else { result.sign = b.sign; result.value = SafeMath.sub(b.value, a.value).to128(); } } return result; } function equals( Par memory a, Par memory b ) internal pure returns (bool) { if (a.value == b.value) { if (a.value == 0) { return true; } return a.sign == b.sign; } return false; } function negative( Par memory a ) internal pure returns (Par memory) { return Par({ sign: !a.sign, value: a.value }); } function isNegative( Par memory a ) internal pure returns (bool) { return !a.sign && a.value > 0; } function isPositive( Par memory a ) internal pure returns (bool) { return a.sign && a.value > 0; } function isZero( Par memory a ) internal pure returns (bool) { return a.value == 0; } // ============ Wei (Token Amount) ============ // Individual token amount for an account struct Wei { bool sign; // true if positive uint256 value; } function zeroWei() internal pure returns (Wei memory) { return Wei({ sign: false, value: 0 }); } function sub( Wei memory a, Wei memory b ) internal pure returns (Wei memory) { return add(a, negative(b)); } function add( Wei memory a, Wei memory b ) internal pure returns (Wei memory) { Wei memory result; if (a.sign == b.sign) { result.sign = a.sign; result.value = SafeMath.add(a.value, b.value); } else { if (a.value >= b.value) { result.sign = a.sign; result.value = SafeMath.sub(a.value, b.value); } else { result.sign = b.sign; result.value = SafeMath.sub(b.value, a.value); } } return result; } function equals( Wei memory a, Wei memory b ) internal pure returns (bool) { if (a.value == b.value) { if (a.value == 0) { return true; } return a.sign == b.sign; } return false; } function negative( Wei memory a ) internal pure returns (Wei memory) { return Wei({ sign: !a.sign, value: a.value }); } function isNegative( Wei memory a ) internal pure returns (bool) { return !a.sign && a.value > 0; } function isPositive( Wei memory a ) internal pure returns (bool) { return a.sign && a.value > 0; } function isZero( Wei memory a ) internal pure returns (bool) { return a.value == 0; } } contract FulcrumSavingsProtocol is ProtocolInterface, DSAuth { address public constant NEW_IDAI_ADDRESS = 0x493C57C4763932315A328269E1ADaD09653B9081; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; address public savingsProxy; uint public decimals = 10 ** 18; function addSavingsProxy(address _savingsProxy) public auth { savingsProxy = _savingsProxy; } function deposit(address _user, uint _amount) public override { require(msg.sender == _user); // get dai from user require(ERC20(DAI_ADDRESS).transferFrom(_user, address(this), _amount)); // approve dai to Fulcrum ERC20(DAI_ADDRESS).approve(NEW_IDAI_ADDRESS, uint(-1)); // mint iDai ITokenInterface(NEW_IDAI_ADDRESS).mint(_user, _amount); } function withdraw(address _user, uint _amount) public override { require(msg.sender == _user); // transfer all users tokens to our contract require(ERC20(NEW_IDAI_ADDRESS).transferFrom(_user, address(this), ITokenInterface(NEW_IDAI_ADDRESS).balanceOf(_user))); // approve iDai to that contract ERC20(NEW_IDAI_ADDRESS).approve(NEW_IDAI_ADDRESS, uint(-1)); uint tokenPrice = ITokenInterface(NEW_IDAI_ADDRESS).tokenPrice(); // get dai from iDai contract ITokenInterface(NEW_IDAI_ADDRESS).burn(_user, _amount * decimals / tokenPrice); // return all remaining tokens back to user require(ERC20(NEW_IDAI_ADDRESS).transfer(_user, ITokenInterface(NEW_IDAI_ADDRESS).balanceOf(address(this)))); } } contract ShifterRegistry is AdminAuth { mapping (string => address) public contractAddresses; bool public finalized; function changeContractAddr(string memory _contractName, address _protoAddr) public onlyOwner { require(!finalized); contractAddresses[_contractName] = _protoAddr; } function lock() public onlyOwner { finalized = true; } function getAddr(string memory _contractName) public view returns (address contractAddr) { contractAddr = contractAddresses[_contractName]; require(contractAddr != address(0), "No contract address registred"); } } library Address { function isContract(address account) internal view returns (bool) { // According to EIP-1052, 0x0 is the value returned for not-yet created accounts // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned // for accounts without code, i.e. `keccak256('')` bytes32 codehash; bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470; // solhint-disable-next-line no-inline-assembly assembly { codehash := extcodehash(account) } return (codehash != accountHash && codehash != 0x0); } function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return _functionCallWithValue(target, data, 0, errorMessage); } function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); return _functionCallWithValue(target, data, value, errorMessage); } function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) { require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: weiValue }(data); if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } contract BotRegistry is AdminAuth { mapping (address => bool) public botList; constructor() public { botList[0x776B4a13093e30B05781F97F6A4565B6aa8BE330] = true; botList[0xAED662abcC4FA3314985E67Ea993CAD064a7F5cF] = true; botList[0xa5d330F6619d6bF892A5B87D80272e1607b3e34D] = true; botList[0x5feB4DeE5150B589a7f567EA7CADa2759794A90A] = true; botList[0x7ca06417c1d6f480d3bB195B80692F95A6B66158] = true; } function setBot(address _botAddr, bool _state) public onlyOwner { botList[_botAddr] = _state; } } contract DFSProxy is Auth { string public constant NAME = "DFSProxy"; string public constant VERSION = "v0.1"; mapping(address => mapping(uint => bool)) public nonces; // --- EIP712 niceties --- bytes32 public DOMAIN_SEPARATOR; bytes32 public constant PERMIT_TYPEHASH = keccak256("callProxy(address _user,address _proxy,address _contract,bytes _txData,uint256 _nonce)"); constructor(uint256 chainId_) public { DOMAIN_SEPARATOR = keccak256(abi.encode( keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"), keccak256(bytes(NAME)), keccak256(bytes(VERSION)), chainId_, address(this) )); } function callProxy(address _user, address _proxy, address _contract, bytes calldata _txData, uint256 _nonce, uint8 _v, bytes32 _r, bytes32 _s) external payable onlyAuthorized { bytes32 digest = keccak256(abi.encodePacked( "\x19\x01", DOMAIN_SEPARATOR, keccak256(abi.encode(PERMIT_TYPEHASH, _user, _proxy, _contract, _txData, _nonce)) )); // user must be proxy owner require(DSProxyInterface(_proxy).owner() == _user); require(_user == ecrecover(digest, _v, _r, _s), "DFSProxy/user-not-valid"); require(!nonces[_user][_nonce], "DFSProxy/invalid-nonce"); nonces[_user][_nonce] = true; DSProxyInterface(_proxy).execute{value: msg.value}(_contract, _txData); } } contract Discount { address public owner; mapping(address => CustomServiceFee) public serviceFees; uint256 constant MAX_SERVICE_FEE = 400; struct CustomServiceFee { bool active; uint256 amount; } constructor() public { owner = msg.sender; } function isCustomFeeSet(address _user) public view returns (bool) { return serviceFees[_user].active; } function getCustomServiceFee(address _user) public view returns (uint256) { return serviceFees[_user].amount; } function setServiceFee(address _user, uint256 _fee) public { require(msg.sender == owner, "Only owner"); require(_fee >= MAX_SERVICE_FEE || _fee == 0); serviceFees[_user] = CustomServiceFee({active: true, amount: _fee}); } function disableServiceFee(address _user) public { require(msg.sender == owner, "Only owner"); serviceFees[_user] = CustomServiceFee({active: false, amount: 0}); } } contract DydxFlashLoanBase { using SafeMath for uint256; address public constant SOLO_MARGIN_ADDRESS = 0x1E0447b19BB6EcFdAe1e4AE1694b0C3659614e4e; function _getMarketIdFromTokenAddress(address token) internal view returns (uint256) { return 0; } function _getRepaymentAmountInternal(uint256 amount) internal view returns (uint256) { // Needs to be overcollateralize // Needs to provide +2 wei to be safe return amount.add(2); } function _getAccountInfo() internal view returns (Account.Info memory) { return Account.Info({owner: address(this), number: 1}); } function _getWithdrawAction(uint marketId, uint256 amount, address contractAddr) internal view returns (Actions.ActionArgs memory) { return Actions.ActionArgs({ actionType: Actions.ActionType.Withdraw, accountId: 0, amount: Types.AssetAmount({ sign: false, denomination: Types.AssetDenomination.Wei, ref: Types.AssetReference.Delta, value: amount }), primaryMarketId: marketId, secondaryMarketId: 0, otherAddress: contractAddr, otherAccountId: 0, data: "" }); } function _getCallAction(bytes memory data, address contractAddr) internal view returns (Actions.ActionArgs memory) { return Actions.ActionArgs({ actionType: Actions.ActionType.Call, accountId: 0, amount: Types.AssetAmount({ sign: false, denomination: Types.AssetDenomination.Wei, ref: Types.AssetReference.Delta, value: 0 }), primaryMarketId: 0, secondaryMarketId: 0, otherAddress: contractAddr, otherAccountId: 0, data: data }); } function _getDepositAction(uint marketId, uint256 amount, address contractAddr) internal view returns (Actions.ActionArgs memory) { return Actions.ActionArgs({ actionType: Actions.ActionType.Deposit, accountId: 0, amount: Types.AssetAmount({ sign: true, denomination: Types.AssetDenomination.Wei, ref: Types.AssetReference.Delta, value: amount }), primaryMarketId: marketId, secondaryMarketId: 0, otherAddress: contractAddr, otherAccountId: 0, data: "" }); } } contract ExchangeDataParser { function decodeExchangeData( SaverExchangeCore.ExchangeData memory exchangeData ) internal pure returns (address[4] memory, uint[4] memory, bytes memory) { return ( [exchangeData.srcAddr, exchangeData.destAddr, exchangeData.exchangeAddr, exchangeData.wrapper], [exchangeData.srcAmount, exchangeData.destAmount, exchangeData.minPrice, exchangeData.price0x], exchangeData.callData ); } function encodeExchangeData( address[4] memory exAddr, uint[4] memory exNum, bytes memory callData ) internal pure returns (SaverExchangeCore.ExchangeData memory) { return SaverExchangeCore.ExchangeData({ srcAddr: exAddr[0], destAddr: exAddr[1], srcAmount: exNum[0], destAmount: exNum[1], minPrice: exNum[2], wrapper: exAddr[3], exchangeAddr: exAddr[2], callData: callData, price0x: exNum[3] }); } } interface IFlashLoanReceiver { function executeOperation(address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external; } abstract contract ILendingPoolAddressesProvider { function getLendingPool() public view virtual returns (address); function setLendingPoolImpl(address _pool) public virtual; function getLendingPoolCore() public virtual view returns (address payable); function setLendingPoolCoreImpl(address _lendingPoolCore) public virtual; function getLendingPoolConfigurator() public virtual view returns (address); function setLendingPoolConfiguratorImpl(address _configurator) public virtual; function getLendingPoolDataProvider() public virtual view returns (address); function setLendingPoolDataProviderImpl(address _provider) public virtual; function getLendingPoolParametersProvider() public virtual view returns (address); function setLendingPoolParametersProviderImpl(address _parametersProvider) public virtual; function getTokenDistributor() public virtual view returns (address); function setTokenDistributor(address _tokenDistributor) public virtual; function getFeeProvider() public virtual view returns (address); function setFeeProviderImpl(address _feeProvider) public virtual; function getLendingPoolLiquidationManager() public virtual view returns (address); function setLendingPoolLiquidationManager(address _manager) public virtual; function getLendingPoolManager() public virtual view returns (address); function setLendingPoolManager(address _lendingPoolManager) public virtual; function getPriceOracle() public virtual view returns (address); function setPriceOracle(address _priceOracle) public virtual; function getLendingRateOracle() public view virtual returns (address); function setLendingRateOracle(address _lendingRateOracle) public virtual; } library EthAddressLib { function ethAddress() internal pure returns(address) { return 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; } } abstract contract FlashLoanReceiverBase is IFlashLoanReceiver { using SafeERC20 for ERC20; using SafeMath for uint256; ILendingPoolAddressesProvider public addressesProvider; constructor(ILendingPoolAddressesProvider _provider) public { addressesProvider = _provider; } receive () external virtual payable {} function transferFundsBackToPoolInternal(address _reserve, uint256 _amount) internal { address payable core = addressesProvider.getLendingPoolCore(); transferInternal(core,_reserve, _amount); } function transferInternal(address payable _destination, address _reserve, uint256 _amount) internal { if(_reserve == EthAddressLib.ethAddress()) { //solium-disable-next-line _destination.call{value: _amount}(""); return; } ERC20(_reserve).safeTransfer(_destination, _amount); } function getBalanceInternal(address _target, address _reserve) internal view returns(uint256) { if(_reserve == EthAddressLib.ethAddress()) { return _target.balance; } return ERC20(_reserve).balanceOf(_target); } } contract GasBurner { // solhint-disable-next-line const-name-snakecase GasTokenInterface public constant gasToken = GasTokenInterface(0x0000000000b3F879cb30FE243b4Dfee438691c04); modifier burnGas(uint _amount) { if (gasToken.balanceOf(address(this)) >= _amount) { gasToken.free(_amount); } _; } } library SafeERC20 { using SafeMath for uint256; using Address for address; function safeTransfer(ERC20 token, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } function safeTransferFrom(ERC20 token, address from, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value)); } /** * @dev Deprecated. This function has issues similar to the ones found in * {IERC20-approve}, and its usage is discouraged. */ function safeApprove(ERC20 token, address spender, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, 0)); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value)); } function safeIncreaseAllowance(ERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).add(value); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } function safeDecreaseAllowance(ERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero"); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } function _callOptionalReturn(ERC20 token, bytes memory data) private { bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed"); if (returndata.length > 0) { // Return data is optional // solhint-disable-next-line max-line-length require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } } } library SafeMath { function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } contract ZrxAllowlist is AdminAuth { mapping (address => bool) public zrxAllowlist; mapping(address => bool) private nonPayableAddrs; constructor() public { zrxAllowlist[0x6958F5e95332D93D21af0D7B9Ca85B8212fEE0A5] = true; zrxAllowlist[0x61935CbDd02287B511119DDb11Aeb42F1593b7Ef] = true; zrxAllowlist[0xDef1C0ded9bec7F1a1670819833240f027b25EfF] = true; zrxAllowlist[0x080bf510FCbF18b91105470639e9561022937712] = true; nonPayableAddrs[0x080bf510FCbF18b91105470639e9561022937712] = true; } function setAllowlistAddr(address _zrxAddr, bool _state) public onlyOwner { zrxAllowlist[_zrxAddr] = _state; } function isZrxAddr(address _zrxAddr) public view returns (bool) { return zrxAllowlist[_zrxAddr]; } function addNonPayableAddr(address _nonPayableAddr) public onlyOwner { nonPayableAddrs[_nonPayableAddr] = true; } function removeNonPayableAddr(address _nonPayableAddr) public onlyOwner { nonPayableAddrs[_nonPayableAddr] = false; } function isNonPayableAddr(address _addr) public view returns(bool) { return nonPayableAddrs[_addr]; } } contract AaveBasicProxy is GasBurner { using SafeERC20 for ERC20; address public constant ETH_ADDR = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant AAVE_LENDING_POOL_ADDRESSES = 0x24a42fD28C976A61Df5D00D0599C34c4f90748c8; uint16 public constant AAVE_REFERRAL_CODE = 64; /// @notice User deposits tokens to the Aave protocol /// @dev User needs to approve the DSProxy to pull the _tokenAddr tokens /// @param _tokenAddr The address of the token to be deposited /// @param _amount Amount of tokens to be deposited function deposit(address _tokenAddr, uint256 _amount) public burnGas(5) payable { address lendingPoolCore = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); uint ethValue = _amount; if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(this), _amount); approveToken(_tokenAddr, lendingPoolCore); ethValue = 0; } ILendingPool(lendingPool).deposit{value: ethValue}(_tokenAddr, _amount, AAVE_REFERRAL_CODE); setUserUseReserveAsCollateralIfNeeded(_tokenAddr); } /// @notice User withdraws tokens from the Aave protocol /// @param _tokenAddr The address of the token to be withdrawn /// @param _aTokenAddr ATokens to be withdrawn /// @param _amount Amount of tokens to be withdrawn /// @param _wholeAmount If true we will take the whole amount on chain function withdraw(address _tokenAddr, address _aTokenAddr, uint256 _amount, bool _wholeAmount) public burnGas(8) { uint256 amount = _wholeAmount ? ERC20(_aTokenAddr).balanceOf(address(this)) : _amount; IAToken(_aTokenAddr).redeem(amount); withdrawTokens(_tokenAddr); } /// @notice User borrows tokens to the Aave protocol /// @param _tokenAddr The address of the token to be borrowed /// @param _amount Amount of tokens to be borrowed /// @param _type Send 1 for variable rate and 2 for fixed rate function borrow(address _tokenAddr, uint256 _amount, uint256 _type) public burnGas(8) { address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); ILendingPool(lendingPool).borrow(_tokenAddr, _amount, _type, AAVE_REFERRAL_CODE); withdrawTokens(_tokenAddr); } /// @dev User needs to approve the DSProxy to pull the _tokenAddr tokens /// @notice User paybacks tokens to the Aave protocol /// @param _tokenAddr The address of the token to be paybacked /// @param _aTokenAddr ATokens to be paybacked /// @param _amount Amount of tokens to be payed back /// @param _wholeDebt If true the _amount will be set to the whole amount of the debt function payback(address _tokenAddr, address _aTokenAddr, uint256 _amount, bool _wholeDebt) public burnGas(3) payable { address lendingPoolCore = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); uint256 amount = _amount; (,uint256 borrowAmount,,,,,uint256 originationFee,,,) = ILendingPool(lendingPool).getUserReserveData(_tokenAddr, address(this)); if (_wholeDebt) { amount = borrowAmount + originationFee; } if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(this), amount); approveToken(_tokenAddr, lendingPoolCore); } ILendingPool(lendingPool).repay{value: msg.value}(_tokenAddr, amount, payable(address(this))); withdrawTokens(_tokenAddr); } /// @dev User needs to approve the DSProxy to pull the _tokenAddr tokens /// @notice User paybacks tokens to the Aave protocol /// @param _tokenAddr The address of the token to be paybacked /// @param _aTokenAddr ATokens to be paybacked /// @param _amount Amount of tokens to be payed back /// @param _wholeDebt If true the _amount will be set to the whole amount of the debt function paybackOnBehalf(address _tokenAddr, address _aTokenAddr, uint256 _amount, bool _wholeDebt, address payable _onBehalf) public burnGas(3) payable { address lendingPoolCore = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); uint256 amount = _amount; (,uint256 borrowAmount,,,,,uint256 originationFee,,,) = ILendingPool(lendingPool).getUserReserveData(_tokenAddr, _onBehalf); if (_wholeDebt) { amount = borrowAmount + originationFee; } if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(this), amount); if (originationFee > 0) { ERC20(_tokenAddr).safeTransfer(_onBehalf, originationFee); } approveToken(_tokenAddr, lendingPoolCore); } ILendingPool(lendingPool).repay{value: msg.value}(_tokenAddr, amount, _onBehalf); withdrawTokens(_tokenAddr); } /// @notice Helper method to withdraw tokens from the DSProxy /// @param _tokenAddr Address of the token to be withdrawn function withdrawTokens(address _tokenAddr) public { uint256 amount = _tokenAddr == ETH_ADDR ? address(this).balance : ERC20(_tokenAddr).balanceOf(address(this)); if (amount > 0) { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransfer(msg.sender, amount); } else { msg.sender.transfer(amount); } } } /// @notice Approves token contract to pull underlying tokens from the DSProxy /// @param _tokenAddr Token we are trying to approve /// @param _caller Address which will gain the approval function approveToken(address _tokenAddr, address _caller) internal { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeApprove(_caller, uint256(-1)); } } function setUserUseReserveAsCollateralIfNeeded(address _tokenAddr) public { address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); (,,,,,,,,,bool collateralEnabled) = ILendingPool(lendingPool).getUserReserveData(_tokenAddr, address(this)); if (!collateralEnabled) { ILendingPool(lendingPool).setUserUseReserveAsCollateral(_tokenAddr, true); } } function setUserUseReserveAsCollateral(address _tokenAddr, bool _true) public { address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); ILendingPool(lendingPool).setUserUseReserveAsCollateral(_tokenAddr, _true); } function swapBorrowRateMode(address _reserve) public { address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); ILendingPool(lendingPool).swapBorrowRateMode(_reserve); } } contract AaveLoanInfo is AaveSafetyRatio { struct LoanData { address user; uint128 ratio; address[] collAddr; address[] borrowAddr; uint256[] collAmounts; uint256[] borrowAmounts; } struct TokenInfo { address aTokenAddress; address underlyingTokenAddress; uint256 collateralFactor; uint256 price; } struct TokenInfoFull { address aTokenAddress; address underlyingTokenAddress; uint256 supplyRate; uint256 borrowRate; uint256 borrowRateStable; uint256 totalSupply; uint256 availableLiquidity; uint256 totalBorrow; uint256 collateralFactor; uint256 liquidationRatio; uint256 price; bool usageAsCollateralEnabled; } struct UserToken { address token; uint256 balance; uint256 borrows; uint256 borrowRateMode; bool enabledAsCollateral; } /// @notice Calcualted the ratio of coll/debt for a compound user /// @param _user Address of the user function getRatio(address _user) public view returns (uint256) { // For each asset the account is in return getSafetyRatio(_user); } /// @notice Fetches Aave prices for tokens /// @param _tokens Arr. of tokens for which to get the prices /// @return prices Array of prices function getPrices(address[] memory _tokens) public view returns (uint256[] memory prices) { address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); prices = new uint[](_tokens.length); for (uint256 i = 0; i < _tokens.length; ++i) { prices[i] = IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_tokens[i]); } } /// @notice Fetches Aave collateral factors for tokens /// @param _tokens Arr. of tokens for which to get the coll. factors /// @return collFactors Array of coll. factors function getCollFactors(address[] memory _tokens) public view returns (uint256[] memory collFactors) { address lendingPoolCoreAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); collFactors = new uint256[](_tokens.length); for (uint256 i = 0; i < _tokens.length; ++i) { (,collFactors[i],,) = ILendingPool(lendingPoolCoreAddress).getReserveConfiguration(_tokens[i]); } } function getTokenBalances(address _user, address[] memory _tokens) public view returns (UserToken[] memory userTokens) { address lendingPoolAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); userTokens = new UserToken[](_tokens.length); for (uint256 i = 0; i < _tokens.length; i++) { address asset = _tokens[i]; userTokens[i].token = asset; (userTokens[i].balance, userTokens[i].borrows,,userTokens[i].borrowRateMode,,,,,,userTokens[i].enabledAsCollateral) = ILendingPool(lendingPoolAddress).getUserReserveData(asset, _user); } } /// @notice Calcualted the ratio of coll/debt for an aave user /// @param _users Addresses of the user /// @return ratios Array of ratios function getRatios(address[] memory _users) public view returns (uint256[] memory ratios) { ratios = new uint256[](_users.length); for (uint256 i = 0; i < _users.length; ++i) { ratios[i] = getSafetyRatio(_users[i]); } } /// @notice Information about reserves /// @param _tokenAddresses Array of tokens addresses /// @return tokens Array of reserves infomartion function getTokensInfo(address[] memory _tokenAddresses) public view returns(TokenInfo[] memory tokens) { address lendingPoolCoreAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); tokens = new TokenInfo[](_tokenAddresses.length); for (uint256 i = 0; i < _tokenAddresses.length; ++i) { (,uint256 ltv,,) = ILendingPool(lendingPoolCoreAddress).getReserveConfiguration(_tokenAddresses[i]); tokens[i] = TokenInfo({ aTokenAddress: ILendingPool(lendingPoolCoreAddress).getReserveATokenAddress(_tokenAddresses[i]), underlyingTokenAddress: _tokenAddresses[i], collateralFactor: ltv, price: IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_tokenAddresses[i]) }); } } /// @notice Information about reserves /// @param _tokenAddresses Array of token addresses /// @return tokens Array of reserves infomartion function getFullTokensInfo(address[] memory _tokenAddresses) public view returns(TokenInfoFull[] memory tokens) { address lendingPoolCoreAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPoolAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); tokens = new TokenInfoFull[](_tokenAddresses.length); for (uint256 i = 0; i < _tokenAddresses.length; ++i) { (uint256 ltv, uint256 liqRatio,,, bool usageAsCollateralEnabled, bool borrowingEnabled, bool stableBorrowingEnabled,) = ILendingPool(lendingPoolAddress).getReserveConfigurationData(_tokenAddresses[i]); tokens[i] = TokenInfoFull({ aTokenAddress: ILendingPool(lendingPoolCoreAddress).getReserveATokenAddress(_tokenAddresses[i]), underlyingTokenAddress: _tokenAddresses[i], supplyRate: ILendingPool(lendingPoolCoreAddress).getReserveCurrentLiquidityRate(_tokenAddresses[i]), borrowRate: borrowingEnabled ? ILendingPool(lendingPoolCoreAddress).getReserveCurrentVariableBorrowRate(_tokenAddresses[i]) : 0, borrowRateStable: stableBorrowingEnabled ? ILendingPool(lendingPoolCoreAddress).getReserveCurrentStableBorrowRate(_tokenAddresses[i]) : 0, totalSupply: ILendingPool(lendingPoolCoreAddress).getReserveTotalLiquidity(_tokenAddresses[i]), availableLiquidity: ILendingPool(lendingPoolCoreAddress).getReserveAvailableLiquidity(_tokenAddresses[i]), totalBorrow: ILendingPool(lendingPoolCoreAddress).getReserveTotalBorrowsVariable(_tokenAddresses[i]), collateralFactor: ltv, liquidationRatio: liqRatio, price: IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_tokenAddresses[i]), usageAsCollateralEnabled: usageAsCollateralEnabled }); } } /// @notice Fetches all the collateral/debt address and amounts, denominated in ether /// @param _user Address of the user /// @return data LoanData information function getLoanData(address _user) public view returns (LoanData memory data) { address lendingPoolAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); address[] memory reserves = ILendingPool(lendingPoolAddress).getReserves(); data = LoanData({ user: _user, ratio: 0, collAddr: new address[](reserves.length), borrowAddr: new address[](reserves.length), collAmounts: new uint[](reserves.length), borrowAmounts: new uint[](reserves.length) }); uint64 collPos = 0; uint64 borrowPos = 0; for (uint64 i = 0; i < reserves.length; i++) { address reserve = reserves[i]; (uint256 aTokenBalance, uint256 borrowBalance,,,,,,,,) = ILendingPool(lendingPoolAddress).getUserReserveData(reserve, _user); uint256 price = IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(reserves[i]); if (aTokenBalance > 0) { uint256 userTokenBalanceEth = wmul(aTokenBalance, price) * (10 ** (18 - _getDecimals(reserve))); data.collAddr[collPos] = reserve; data.collAmounts[collPos] = userTokenBalanceEth; collPos++; } // Sum up debt in Eth if (borrowBalance > 0) { uint256 userBorrowBalanceEth = wmul(borrowBalance, price) * (10 ** (18 - _getDecimals(reserve))); data.borrowAddr[borrowPos] = reserve; data.borrowAmounts[borrowPos] = userBorrowBalanceEth; borrowPos++; } } data.ratio = uint128(getSafetyRatio(_user)); return data; } /// @notice Fetches all the collateral/debt address and amounts, denominated in ether /// @param _users Addresses of the user /// @return loans Array of LoanData information function getLoanDataArr(address[] memory _users) public view returns (LoanData[] memory loans) { loans = new LoanData[](_users.length); for (uint i = 0; i < _users.length; ++i) { loans[i] = getLoanData(_users[i]); } } } contract AaveMonitor is AdminAuth, DSMath, AaveSafetyRatio, GasBurner { using SafeERC20 for ERC20; enum Method { Boost, Repay } uint public REPAY_GAS_TOKEN = 19; uint public BOOST_GAS_TOKEN = 19; uint public MAX_GAS_PRICE = 200000000000; // 200 gwei uint public REPAY_GAS_COST = 2500000; uint public BOOST_GAS_COST = 2500000; address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; AaveMonitorProxy public aaveMonitorProxy; AaveSubscriptions public subscriptionsContract; address public aaveSaverProxy; DefisaverLogger public logger = DefisaverLogger(DEFISAVER_LOGGER); modifier onlyApproved() { require(BotRegistry(BOT_REGISTRY_ADDRESS).botList(msg.sender), "Not auth bot"); _; } /// @param _aaveMonitorProxy Proxy contracts that actually is authorized to call DSProxy /// @param _subscriptions Subscriptions contract for Aave positions /// @param _aaveSaverProxy Contract that actually performs Repay/Boost constructor(address _aaveMonitorProxy, address _subscriptions, address _aaveSaverProxy) public { aaveMonitorProxy = AaveMonitorProxy(_aaveMonitorProxy); subscriptionsContract = AaveSubscriptions(_subscriptions); aaveSaverProxy = _aaveSaverProxy; } /// @notice Bots call this method to repay for user when conditions are met /// @dev If the contract ownes gas token it will try and use it for gas price reduction /// @param _exData Exchange data /// @param _user The actual address that owns the Aave position function repayFor( SaverExchangeCore.ExchangeData memory _exData, address _user ) public payable onlyApproved burnGas(REPAY_GAS_TOKEN) { (bool isAllowed, uint ratioBefore) = canCall(Method.Repay, _user); require(isAllowed); // check if conditions are met uint256 gasCost = calcGasCost(REPAY_GAS_COST); aaveMonitorProxy.callExecute{value: msg.value}( _user, aaveSaverProxy, abi.encodeWithSignature( "repay((address,address,uint256,uint256,uint256,address,address,bytes,uint256),uint256)", _exData, gasCost ) ); (bool isGoodRatio, uint ratioAfter) = ratioGoodAfter(Method.Repay, _user); require(isGoodRatio); // check if the after result of the actions is good returnEth(); logger.Log(address(this), _user, "AutomaticAaveRepay", abi.encode(ratioBefore, ratioAfter)); } /// @notice Bots call this method to boost for user when conditions are met /// @dev If the contract ownes gas token it will try and use it for gas price reduction /// @param _exData Exchange data /// @param _user The actual address that owns the Aave position function boostFor( SaverExchangeCore.ExchangeData memory _exData, address _user ) public payable onlyApproved burnGas(BOOST_GAS_TOKEN) { (bool isAllowed, uint ratioBefore) = canCall(Method.Boost, _user); require(isAllowed); // check if conditions are met uint256 gasCost = calcGasCost(BOOST_GAS_COST); aaveMonitorProxy.callExecute{value: msg.value}( _user, aaveSaverProxy, abi.encodeWithSignature( "boost((address,address,uint256,uint256,uint256,address,address,bytes,uint256),uint256)", _exData, gasCost ) ); (bool isGoodRatio, uint ratioAfter) = ratioGoodAfter(Method.Boost, _user); require(isGoodRatio); // check if the after result of the actions is good returnEth(); logger.Log(address(this), _user, "AutomaticAaveBoost", abi.encode(ratioBefore, ratioAfter)); } /******************* INTERNAL METHODS ********************************/ function returnEth() internal { // return if some eth left if (address(this).balance > 0) { msg.sender.transfer(address(this).balance); } } /******************* STATIC METHODS ********************************/ /// @notice Checks if Boost/Repay could be triggered for the CDP /// @dev Called by AaveMonitor to enforce the min/max check /// @param _method Type of action to be called /// @param _user The actual address that owns the Aave position /// @return Boolean if it can be called and the ratio function canCall(Method _method, address _user) public view returns(bool, uint) { bool subscribed = subscriptionsContract.isSubscribed(_user); AaveSubscriptions.AaveHolder memory holder = subscriptionsContract.getHolder(_user); // check if cdp is subscribed if (!subscribed) return (false, 0); // check if boost and boost allowed if (_method == Method.Boost && !holder.boostEnabled) return (false, 0); uint currRatio = getSafetyRatio(_user); if (_method == Method.Repay) { return (currRatio < holder.minRatio, currRatio); } else if (_method == Method.Boost) { return (currRatio > holder.maxRatio, currRatio); } } /// @dev After the Boost/Repay check if the ratio doesn't trigger another call /// @param _method Type of action to be called /// @param _user The actual address that owns the Aave position /// @return Boolean if the recent action preformed correctly and the ratio function ratioGoodAfter(Method _method, address _user) public view returns(bool, uint) { AaveSubscriptions.AaveHolder memory holder; holder= subscriptionsContract.getHolder(_user); uint currRatio = getSafetyRatio(_user); if (_method == Method.Repay) { return (currRatio < holder.maxRatio, currRatio); } else if (_method == Method.Boost) { return (currRatio > holder.minRatio, currRatio); } } /// @notice Calculates gas cost (in Eth) of tx /// @dev Gas price is limited to MAX_GAS_PRICE to prevent attack of draining user CDP /// @param _gasAmount Amount of gas used for the tx function calcGasCost(uint _gasAmount) public view returns (uint) { uint gasPrice = tx.gasprice <= MAX_GAS_PRICE ? tx.gasprice : MAX_GAS_PRICE; return mul(gasPrice, _gasAmount); } /******************* OWNER ONLY OPERATIONS ********************************/ /// @notice Allows owner to change gas cost for boost operation, but only up to 3 millions /// @param _gasCost New gas cost for boost method function changeBoostGasCost(uint _gasCost) public onlyOwner { require(_gasCost < 3000000); BOOST_GAS_COST = _gasCost; } /// @notice Allows owner to change gas cost for repay operation, but only up to 3 millions /// @param _gasCost New gas cost for repay method function changeRepayGasCost(uint _gasCost) public onlyOwner { require(_gasCost < 3000000); REPAY_GAS_COST = _gasCost; } /// @notice Allows owner to change max gas price /// @param _maxGasPrice New max gas price function changeMaxGasPrice(uint _maxGasPrice) public onlyOwner { require(_maxGasPrice < 500000000000); MAX_GAS_PRICE = _maxGasPrice; } /// @notice Allows owner to change gas token amount /// @param _gasTokenAmount New gas token amount /// @param _repay true if repay gas token, false if boost gas token function changeGasTokenAmount(uint _gasTokenAmount, bool _repay) public onlyOwner { if (_repay) { REPAY_GAS_TOKEN = _gasTokenAmount; } else { BOOST_GAS_TOKEN = _gasTokenAmount; } } } contract AaveMonitorProxy is AdminAuth { using SafeERC20 for ERC20; uint public CHANGE_PERIOD; address public monitor; address public newMonitor; address public lastMonitor; uint public changeRequestedTimestamp; mapping(address => bool) public allowed; event MonitorChangeInitiated(address oldMonitor, address newMonitor); event MonitorChangeCanceled(); event MonitorChangeFinished(address monitor); event MonitorChangeReverted(address monitor); // if someone who is allowed become malicious, owner can't be changed modifier onlyAllowed() { require(allowed[msg.sender] || msg.sender == owner); _; } modifier onlyMonitor() { require (msg.sender == monitor); _; } constructor(uint _changePeriod) public { CHANGE_PERIOD = _changePeriod * 1 days; } /// @notice Only monitor contract is able to call execute on users proxy /// @param _owner Address of cdp owner (users DSProxy address) /// @param _aaveSaverProxy Address of AaveSaverProxy /// @param _data Data to send to AaveSaverProxy function callExecute(address _owner, address _aaveSaverProxy, bytes memory _data) public payable onlyMonitor { // execute reverts if calling specific method fails DSProxyInterface(_owner).execute{value: msg.value}(_aaveSaverProxy, _data); // return if anything left if (address(this).balance > 0) { msg.sender.transfer(address(this).balance); } } /// @notice Allowed users are able to set Monitor contract without any waiting period first time /// @param _monitor Address of Monitor contract function setMonitor(address _monitor) public onlyAllowed { require(monitor == address(0)); monitor = _monitor; } /// @notice Allowed users are able to start procedure for changing monitor /// @dev after CHANGE_PERIOD needs to call confirmNewMonitor to actually make a change /// @param _newMonitor address of new monitor function changeMonitor(address _newMonitor) public onlyAllowed { require(changeRequestedTimestamp == 0); changeRequestedTimestamp = now; lastMonitor = monitor; newMonitor = _newMonitor; emit MonitorChangeInitiated(lastMonitor, newMonitor); } /// @notice At any point allowed users are able to cancel monitor change function cancelMonitorChange() public onlyAllowed { require(changeRequestedTimestamp > 0); changeRequestedTimestamp = 0; newMonitor = address(0); emit MonitorChangeCanceled(); } /// @notice Anyone is able to confirm new monitor after CHANGE_PERIOD if process is started function confirmNewMonitor() public onlyAllowed { require((changeRequestedTimestamp + CHANGE_PERIOD) < now); require(changeRequestedTimestamp != 0); require(newMonitor != address(0)); monitor = newMonitor; newMonitor = address(0); changeRequestedTimestamp = 0; emit MonitorChangeFinished(monitor); } /// @notice Its possible to revert monitor to last used monitor function revertMonitor() public onlyAllowed { require(lastMonitor != address(0)); monitor = lastMonitor; emit MonitorChangeReverted(monitor); } /// @notice Allowed users are able to add new allowed user /// @param _user Address of user that will be allowed function addAllowed(address _user) public onlyAllowed { allowed[_user] = true; } /// @notice Allowed users are able to remove allowed user /// @dev owner is always allowed even if someone tries to remove it from allowed mapping /// @param _user Address of allowed user function removeAllowed(address _user) public onlyAllowed { allowed[_user] = false; } function setChangePeriod(uint _periodInDays) public onlyAllowed { require(_periodInDays * 1 days > CHANGE_PERIOD); CHANGE_PERIOD = _periodInDays * 1 days; } /// @notice In case something is left in contract, owner is able to withdraw it /// @param _token address of token to withdraw balance function withdrawToken(address _token) public onlyOwner { uint balance = ERC20(_token).balanceOf(address(this)); ERC20(_token).safeTransfer(msg.sender, balance); } /// @notice In case something is left in contract, owner is able to withdraw it function withdrawEth() public onlyOwner { uint balance = address(this).balance; msg.sender.transfer(balance); } } contract AaveSubscriptions is AdminAuth { struct AaveHolder { address user; uint128 minRatio; uint128 maxRatio; uint128 optimalRatioBoost; uint128 optimalRatioRepay; bool boostEnabled; } struct SubPosition { uint arrPos; bool subscribed; } AaveHolder[] public subscribers; mapping (address => SubPosition) public subscribersPos; uint public changeIndex; event Subscribed(address indexed user); event Unsubscribed(address indexed user); event Updated(address indexed user); event ParamUpdates(address indexed user, uint128, uint128, uint128, uint128, bool); /// @dev Called by the DSProxy contract which owns the Aave position /// @notice Adds the users Aave poistion in the list of subscriptions so it can be monitored /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalBoost Ratio amount which boost should target /// @param _optimalRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled function subscribe(uint128 _minRatio, uint128 _maxRatio, uint128 _optimalBoost, uint128 _optimalRepay, bool _boostEnabled) external { // if boost is not enabled, set max ratio to max uint uint128 localMaxRatio = _boostEnabled ? _maxRatio : uint128(-1); require(checkParams(_minRatio, localMaxRatio), "Must be correct params"); SubPosition storage subInfo = subscribersPos[msg.sender]; AaveHolder memory subscription = AaveHolder({ minRatio: _minRatio, maxRatio: localMaxRatio, optimalRatioBoost: _optimalBoost, optimalRatioRepay: _optimalRepay, user: msg.sender, boostEnabled: _boostEnabled }); changeIndex++; if (subInfo.subscribed) { subscribers[subInfo.arrPos] = subscription; emit Updated(msg.sender); emit ParamUpdates(msg.sender, _minRatio, localMaxRatio, _optimalBoost, _optimalRepay, _boostEnabled); } else { subscribers.push(subscription); subInfo.arrPos = subscribers.length - 1; subInfo.subscribed = true; emit Subscribed(msg.sender); } } /// @notice Called by the users DSProxy /// @dev Owner who subscribed cancels his subscription function unsubscribe() external { _unsubscribe(msg.sender); } /// @dev Checks limit if minRatio is bigger than max /// @param _minRatio Minimum ratio, bellow which repay can be triggered /// @param _maxRatio Maximum ratio, over which boost can be triggered /// @return Returns bool if the params are correct function checkParams(uint128 _minRatio, uint128 _maxRatio) internal pure returns (bool) { if (_minRatio > _maxRatio) { return false; } return true; } /// @dev Internal method to remove a subscriber from the list /// @param _user The actual address that owns the Aave position function _unsubscribe(address _user) internal { require(subscribers.length > 0, "Must have subscribers in the list"); SubPosition storage subInfo = subscribersPos[_user]; require(subInfo.subscribed, "Must first be subscribed"); address lastOwner = subscribers[subscribers.length - 1].user; SubPosition storage subInfo2 = subscribersPos[lastOwner]; subInfo2.arrPos = subInfo.arrPos; subscribers[subInfo.arrPos] = subscribers[subscribers.length - 1]; subscribers.pop(); // remove last element and reduce arr length changeIndex++; subInfo.subscribed = false; subInfo.arrPos = 0; emit Unsubscribed(msg.sender); } /// @dev Checks if the user is subscribed /// @param _user The actual address that owns the Aave position /// @return If the user is subscribed function isSubscribed(address _user) public view returns (bool) { SubPosition storage subInfo = subscribersPos[_user]; return subInfo.subscribed; } /// @dev Returns subscribtion information about a user /// @param _user The actual address that owns the Aave position /// @return Subscription information about the user if exists function getHolder(address _user) public view returns (AaveHolder memory) { SubPosition storage subInfo = subscribersPos[_user]; return subscribers[subInfo.arrPos]; } /// @notice Helper method to return all the subscribed CDPs /// @return List of all subscribers function getSubscribers() public view returns (AaveHolder[] memory) { return subscribers; } /// @notice Helper method for the frontend, returns all the subscribed CDPs paginated /// @param _page What page of subscribers you want /// @param _perPage Number of entries per page /// @return List of all subscribers for that page function getSubscribersByPage(uint _page, uint _perPage) public view returns (AaveHolder[] memory) { AaveHolder[] memory holders = new AaveHolder[](_perPage); uint start = _page * _perPage; uint end = start + _perPage; end = (end > holders.length) ? holders.length : end; uint count = 0; for (uint i = start; i < end; i++) { holders[count] = subscribers[i]; count++; } return holders; } ////////////// ADMIN METHODS /////////////////// /// @notice Admin function to unsubscribe a position /// @param _user The actual address that owns the Aave position function unsubscribeByAdmin(address _user) public onlyOwner { SubPosition storage subInfo = subscribersPos[_user]; if (subInfo.subscribed) { _unsubscribe(_user); } } } contract AaveSubscriptionsProxy is ProxyPermission { address public constant AAVE_SUBSCRIPTION_ADDRESS = 0xe08ff7A2BADb634F0b581E675E6B3e583De086FC; address public constant AAVE_MONITOR_PROXY = 0xfA560Dba3a8D0B197cA9505A2B98120DD89209AC; /// @notice Calls subscription contract and creates a DSGuard if non existent /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalRatioBoost Ratio amount which boost should target /// @param _optimalRatioRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled function subscribe( uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled ) public { givePermission(AAVE_MONITOR_PROXY); IAaveSubscription(AAVE_SUBSCRIPTION_ADDRESS).subscribe( _minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled); } /// @notice Calls subscription contract and updated existing parameters /// @dev If subscription is non existent this will create one /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalRatioBoost Ratio amount which boost should target /// @param _optimalRatioRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled function update( uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled ) public { IAaveSubscription(AAVE_SUBSCRIPTION_ADDRESS).subscribe(_minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled); } /// @notice Calls the subscription contract to unsubscribe the caller function unsubscribe() public { removePermission(AAVE_MONITOR_PROXY); IAaveSubscription(AAVE_SUBSCRIPTION_ADDRESS).unsubscribe(); } } contract AaveImport is AaveHelper, AdminAuth { using SafeERC20 for ERC20; address public constant WETH_ADDRESS = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address public constant BASIC_PROXY = 0x29F4af15ad64C509c4140324cFE71FB728D10d2B; address public constant AETH_ADDRESS = 0x3a3A65aAb0dd2A17E3F1947bA16138cd37d08c04; function callFunction( address sender, Account.Info memory account, bytes memory data ) public { ( address collateralToken, address borrowToken, uint256 ethAmount, address user, address proxy ) = abi.decode(data, (address,address,uint256,address,address)); // withdraw eth TokenInterface(WETH_ADDRESS).withdraw(ethAmount); address lendingPoolCoreAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); address aCollateralToken = ILendingPool(lendingPoolCoreAddress).getReserveATokenAddress(collateralToken); address aBorrowToken = ILendingPool(lendingPoolCoreAddress).getReserveATokenAddress(borrowToken); uint256 globalBorrowAmount = 0; { // avoid stack too deep // deposit eth on behalf of proxy DSProxy(payable(proxy)).execute{value: ethAmount}(BASIC_PROXY, abi.encodeWithSignature("deposit(address,uint256)", ETH_ADDR, ethAmount)); // borrow needed amount to repay users borrow (,uint256 borrowAmount,,uint256 borrowRateMode,,,uint256 originationFee,,,) = ILendingPool(lendingPool).getUserReserveData(borrowToken, user); borrowAmount += originationFee; DSProxy(payable(proxy)).execute(BASIC_PROXY, abi.encodeWithSignature("borrow(address,uint256,uint256)", borrowToken, borrowAmount, borrowRateMode)); globalBorrowAmount = borrowAmount; } // payback on behalf of user if (borrowToken != ETH_ADDR) { ERC20(borrowToken).safeApprove(proxy, globalBorrowAmount); DSProxy(payable(proxy)).execute(BASIC_PROXY, abi.encodeWithSignature("paybackOnBehalf(address,address,uint256,bool,address)", borrowToken, aBorrowToken, 0, true, user)); } else { DSProxy(payable(proxy)).execute{value: globalBorrowAmount}(BASIC_PROXY, abi.encodeWithSignature("paybackOnBehalf(address,address,uint256,bool,address)", borrowToken, aBorrowToken, 0, true, user)); } // pull tokens from user to proxy ERC20(aCollateralToken).safeTransferFrom(user, proxy, ERC20(aCollateralToken).balanceOf(user)); // enable as collateral DSProxy(payable(proxy)).execute(BASIC_PROXY, abi.encodeWithSignature("setUserUseReserveAsCollateralIfNeeded(address)", collateralToken)); // withdraw deposited eth DSProxy(payable(proxy)).execute(BASIC_PROXY, abi.encodeWithSignature("withdraw(address,address,uint256,bool)", ETH_ADDR, AETH_ADDRESS, ethAmount, false)); // deposit eth, get weth and return to sender TokenInterface(WETH_ADDRESS).deposit.value(address(this).balance)(); ERC20(WETH_ADDRESS).safeTransfer(proxy, ethAmount+2); } /// @dev if contract receive eth, convert it to WETH receive() external payable { // deposit eth and get weth if (msg.sender == owner) { TokenInterface(WETH_ADDRESS).deposit.value(address(this).balance)(); } } } contract AaveImportTaker is DydxFlashLoanBase, ProxyPermission { address public constant WETH_ADDR = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address payable public constant AAVE_IMPORT = 0x7b856af5753a9f80968EA002641E69AdF1d795aB; address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; address public constant PROXY_REGISTRY_ADDRESS = 0x4678f0a6958e4D2Bc4F1BAF7Bc52E8F3564f3fE4; /// @notice Starts the process to move users position 1 collateral and 1 borrow /// @dev User must send 2 wei with this transaction /// @dev User must approve AaveImport to pull _aCollateralToken /// @param _collateralToken Collateral token we are moving to DSProxy /// @param _borrowToken Borrow token we are moving to DSProxy /// @param _ethAmount ETH amount that needs to be pulled from dydx function importLoan(address _collateralToken, address _borrowToken, uint _ethAmount) public { ISoloMargin solo = ISoloMargin(SOLO_MARGIN_ADDRESS); // Get marketId from token address uint256 marketId = _getMarketIdFromTokenAddress(WETH_ADDR); // Calculate repay amount (_amount + (2 wei)) // Approve transfer from uint256 repayAmount = _getRepaymentAmountInternal(_ethAmount); ERC20(WETH_ADDR).approve(SOLO_MARGIN_ADDRESS, repayAmount); Actions.ActionArgs[] memory operations = new Actions.ActionArgs[](3); operations[0] = _getWithdrawAction(marketId, _ethAmount, AAVE_IMPORT); operations[1] = _getCallAction( abi.encode(_collateralToken, _borrowToken, _ethAmount, msg.sender, address(this)), AAVE_IMPORT ); operations[2] = _getDepositAction(marketId, repayAmount, address(this)); Account.Info[] memory accountInfos = new Account.Info[](1); accountInfos[0] = _getAccountInfo(); givePermission(AAVE_IMPORT); solo.operate(accountInfos, operations); removePermission(AAVE_IMPORT); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "AaveImport", abi.encode(_collateralToken, _borrowToken)); } } contract CompoundBasicProxy is GasBurner { address public constant ETH_ADDR = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant COMPTROLLER_ADDR = 0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B; using SafeERC20 for ERC20; /// @notice User deposits tokens to the Compound protocol /// @dev User needs to approve the DSProxy to pull the _tokenAddr tokens /// @param _tokenAddr The address of the token to be deposited /// @param _cTokenAddr CTokens to be deposited /// @param _amount Amount of tokens to be deposited /// @param _inMarket True if the token is already in market for that address function deposit(address _tokenAddr, address _cTokenAddr, uint _amount, bool _inMarket) public burnGas(5) payable { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(this), _amount); } approveToken(_tokenAddr, _cTokenAddr); if (!_inMarket) { enterMarket(_cTokenAddr); } if (_tokenAddr != ETH_ADDR) { require(CTokenInterface(_cTokenAddr).mint(_amount) == 0); } else { CEtherInterface(_cTokenAddr).mint{value: msg.value}(); // reverts on fail } } /// @notice User withdraws tokens to the Compound protocol /// @param _tokenAddr The address of the token to be withdrawn /// @param _cTokenAddr CTokens to be withdrawn /// @param _amount Amount of tokens to be withdrawn /// @param _isCAmount If true _amount is cTokens if falls _amount is underlying tokens function withdraw(address _tokenAddr, address _cTokenAddr, uint _amount, bool _isCAmount) public burnGas(5) { if (_isCAmount) { require(CTokenInterface(_cTokenAddr).redeem(_amount) == 0); } else { require(CTokenInterface(_cTokenAddr).redeemUnderlying(_amount) == 0); } // withdraw funds to msg.sender if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransfer(msg.sender, ERC20(_tokenAddr).balanceOf(address(this))); } else { msg.sender.transfer(address(this).balance); } } /// @notice User borrows tokens to the Compound protocol /// @param _tokenAddr The address of the token to be borrowed /// @param _cTokenAddr CTokens to be borrowed /// @param _amount Amount of tokens to be borrowed /// @param _inMarket True if the token is already in market for that address function borrow(address _tokenAddr, address _cTokenAddr, uint _amount, bool _inMarket) public burnGas(8) { if (!_inMarket) { enterMarket(_cTokenAddr); } require(CTokenInterface(_cTokenAddr).borrow(_amount) == 0); // withdraw funds to msg.sender if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransfer(msg.sender, ERC20(_tokenAddr).balanceOf(address(this))); } else { msg.sender.transfer(address(this).balance); } } /// @dev User needs to approve the DSProxy to pull the _tokenAddr tokens /// @notice User paybacks tokens to the Compound protocol /// @param _tokenAddr The address of the token to be paybacked /// @param _cTokenAddr CTokens to be paybacked /// @param _amount Amount of tokens to be payedback /// @param _wholeDebt If true the _amount will be set to the whole amount of the debt function payback(address _tokenAddr, address _cTokenAddr, uint _amount, bool _wholeDebt) public burnGas(5) payable { approveToken(_tokenAddr, _cTokenAddr); if (_wholeDebt) { _amount = CTokenInterface(_cTokenAddr).borrowBalanceCurrent(address(this)); } if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(this), _amount); require(CTokenInterface(_cTokenAddr).repayBorrow(_amount) == 0); } else { CEtherInterface(_cTokenAddr).repayBorrow{value: msg.value}(); msg.sender.transfer(address(this).balance); // send back the extra eth } } /// @notice Helper method to withdraw tokens from the DSProxy /// @param _tokenAddr Address of the token to be withdrawn function withdrawTokens(address _tokenAddr) public { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransfer(msg.sender, ERC20(_tokenAddr).balanceOf(address(this))); } else { msg.sender.transfer(address(this).balance); } } /// @notice Enters the Compound market so it can be deposited/borrowed /// @param _cTokenAddr CToken address of the token function enterMarket(address _cTokenAddr) public { address[] memory markets = new address[](1); markets[0] = _cTokenAddr; ComptrollerInterface(COMPTROLLER_ADDR).enterMarkets(markets); } /// @notice Exits the Compound market so it can't be deposited/borrowed /// @param _cTokenAddr CToken address of the token function exitMarket(address _cTokenAddr) public { ComptrollerInterface(COMPTROLLER_ADDR).exitMarket(_cTokenAddr); } /// @notice Approves CToken contract to pull underlying tokens from the DSProxy /// @param _tokenAddr Token we are trying to approve /// @param _cTokenAddr Address which will gain the approval function approveToken(address _tokenAddr, address _cTokenAddr) internal { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeApprove(_cTokenAddr, uint(-1)); } } } contract CompoundSafetyRatio is Exponential, DSMath { // solhint-disable-next-line const-name-snakecase ComptrollerInterface public constant comp = ComptrollerInterface(0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B); /// @notice Calcualted the ratio of debt / adjusted collateral /// @param _user Address of the user function getSafetyRatio(address _user) public view returns (uint) { // For each asset the account is in address[] memory assets = comp.getAssetsIn(_user); address oracleAddr = comp.oracle(); uint sumCollateral = 0; uint sumBorrow = 0; for (uint i = 0; i < assets.length; i++) { address asset = assets[i]; (, uint cTokenBalance, uint borrowBalance, uint exchangeRateMantissa) = CTokenInterface(asset).getAccountSnapshot(_user); Exp memory oraclePrice; if (cTokenBalance != 0 || borrowBalance != 0) { oraclePrice = Exp({mantissa: CompoundOracleInterface(oracleAddr).getUnderlyingPrice(asset)}); } // Sum up collateral in Usd if (cTokenBalance != 0) { (, uint collFactorMantissa) = comp.markets(address(asset)); Exp memory collateralFactor = Exp({mantissa: collFactorMantissa}); Exp memory exchangeRate = Exp({mantissa: exchangeRateMantissa}); (, Exp memory tokensToUsd) = mulExp3(collateralFactor, exchangeRate, oraclePrice); (, sumCollateral) = mulScalarTruncateAddUInt(tokensToUsd, cTokenBalance, sumCollateral); } // Sum up debt in Usd if (borrowBalance != 0) { (, sumBorrow) = mulScalarTruncateAddUInt(oraclePrice, borrowBalance, sumBorrow); } } if (sumBorrow == 0) return uint(-1); uint borrowPowerUsed = (sumBorrow * 10**18) / sumCollateral; return wdiv(1e18, borrowPowerUsed); } } contract CompoundMonitor is AdminAuth, DSMath, CompoundSafetyRatio, GasBurner { using SafeERC20 for ERC20; enum Method { Boost, Repay } uint public REPAY_GAS_TOKEN = 20; uint public BOOST_GAS_TOKEN = 20; uint constant public MAX_GAS_PRICE = 500000000000; // 500 gwei uint public REPAY_GAS_COST = 2000000; uint public BOOST_GAS_COST = 2000000; address public constant GAS_TOKEN_INTERFACE_ADDRESS = 0x0000000000b3F879cb30FE243b4Dfee438691c04; address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; address public constant BOT_REGISTRY_ADDRESS = 0x637726f8b08a7ABE3aE3aCaB01A80E2d8ddeF77B; CompoundMonitorProxy public compoundMonitorProxy; CompoundSubscriptions public subscriptionsContract; address public compoundFlashLoanTakerAddress; DefisaverLogger public logger = DefisaverLogger(DEFISAVER_LOGGER); modifier onlyApproved() { require(BotRegistry(BOT_REGISTRY_ADDRESS).botList(msg.sender), "Not auth bot"); _; } /// @param _compoundMonitorProxy Proxy contracts that actually is authorized to call DSProxy /// @param _subscriptions Subscriptions contract for Compound positions /// @param _compoundFlashLoanTaker Contract that actually performs Repay/Boost constructor(address _compoundMonitorProxy, address _subscriptions, address _compoundFlashLoanTaker) public { compoundMonitorProxy = CompoundMonitorProxy(_compoundMonitorProxy); subscriptionsContract = CompoundSubscriptions(_subscriptions); compoundFlashLoanTakerAddress = _compoundFlashLoanTaker; } /// @notice Bots call this method to repay for user when conditions are met /// @dev If the contract ownes gas token it will try and use it for gas price reduction /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress, exchangeAddress] /// @param _user The actual address that owns the Compound position function repayFor( SaverExchangeCore.ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress address _user ) public payable onlyApproved burnGas(REPAY_GAS_TOKEN) { (bool isAllowed, uint ratioBefore) = canCall(Method.Repay, _user); require(isAllowed); // check if conditions are met uint256 gasCost = calcGasCost(REPAY_GAS_COST); compoundMonitorProxy.callExecute{value: msg.value}( _user, compoundFlashLoanTakerAddress, abi.encodeWithSignature( "repayWithLoan((address,address,uint256,uint256,uint256,address,address,bytes,uint256),address[2],uint256)", _exData, _cAddresses, gasCost ) ); (bool isGoodRatio, uint ratioAfter) = ratioGoodAfter(Method.Repay, _user); require(isGoodRatio); // check if the after result of the actions is good returnEth(); logger.Log(address(this), _user, "AutomaticCompoundRepay", abi.encode(ratioBefore, ratioAfter)); } /// @notice Bots call this method to boost for user when conditions are met /// @dev If the contract ownes gas token it will try and use it for gas price reduction /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress, exchangeAddress] /// @param _user The actual address that owns the Compound position function boostFor( SaverExchangeCore.ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress address _user ) public payable onlyApproved burnGas(BOOST_GAS_TOKEN) { (bool isAllowed, uint ratioBefore) = canCall(Method.Boost, _user); require(isAllowed); // check if conditions are met uint256 gasCost = calcGasCost(BOOST_GAS_COST); compoundMonitorProxy.callExecute{value: msg.value}( _user, compoundFlashLoanTakerAddress, abi.encodeWithSignature( "boostWithLoan((address,address,uint256,uint256,uint256,address,address,bytes,uint256),address[2],uint256)", _exData, _cAddresses, gasCost ) ); (bool isGoodRatio, uint ratioAfter) = ratioGoodAfter(Method.Boost, _user); require(isGoodRatio); // check if the after result of the actions is good returnEth(); logger.Log(address(this), _user, "AutomaticCompoundBoost", abi.encode(ratioBefore, ratioAfter)); } /******************* INTERNAL METHODS ********************************/ function returnEth() internal { // return if some eth left if (address(this).balance > 0) { msg.sender.transfer(address(this).balance); } } /******************* STATIC METHODS ********************************/ /// @notice Checks if Boost/Repay could be triggered for the CDP /// @dev Called by MCDMonitor to enforce the min/max check /// @param _method Type of action to be called /// @param _user The actual address that owns the Compound position /// @return Boolean if it can be called and the ratio function canCall(Method _method, address _user) public view returns(bool, uint) { bool subscribed = subscriptionsContract.isSubscribed(_user); CompoundSubscriptions.CompoundHolder memory holder = subscriptionsContract.getHolder(_user); // check if cdp is subscribed if (!subscribed) return (false, 0); // check if boost and boost allowed if (_method == Method.Boost && !holder.boostEnabled) return (false, 0); uint currRatio = getSafetyRatio(_user); if (_method == Method.Repay) { return (currRatio < holder.minRatio, currRatio); } else if (_method == Method.Boost) { return (currRatio > holder.maxRatio, currRatio); } } /// @dev After the Boost/Repay check if the ratio doesn't trigger another call /// @param _method Type of action to be called /// @param _user The actual address that owns the Compound position /// @return Boolean if the recent action preformed correctly and the ratio function ratioGoodAfter(Method _method, address _user) public view returns(bool, uint) { CompoundSubscriptions.CompoundHolder memory holder; holder= subscriptionsContract.getHolder(_user); uint currRatio = getSafetyRatio(_user); if (_method == Method.Repay) { return (currRatio < holder.maxRatio, currRatio); } else if (_method == Method.Boost) { return (currRatio > holder.minRatio, currRatio); } } /// @notice Calculates gas cost (in Eth) of tx /// @dev Gas price is limited to MAX_GAS_PRICE to prevent attack of draining user CDP /// @param _gasAmount Amount of gas used for the tx function calcGasCost(uint _gasAmount) public view returns (uint) { uint gasPrice = tx.gasprice <= MAX_GAS_PRICE ? tx.gasprice : MAX_GAS_PRICE; return mul(gasPrice, _gasAmount); } /******************* OWNER ONLY OPERATIONS ********************************/ /// @notice Allows owner to change gas cost for boost operation, but only up to 3 millions /// @param _gasCost New gas cost for boost method function changeBoostGasCost(uint _gasCost) public onlyOwner { require(_gasCost < 3000000); BOOST_GAS_COST = _gasCost; } /// @notice Allows owner to change gas cost for repay operation, but only up to 3 millions /// @param _gasCost New gas cost for repay method function changeRepayGasCost(uint _gasCost) public onlyOwner { require(_gasCost < 3000000); REPAY_GAS_COST = _gasCost; } /// @notice If any tokens gets stuck in the contract owner can withdraw it /// @param _tokenAddress Address of the ERC20 token /// @param _to Address of the receiver /// @param _amount The amount to be sent function transferERC20(address _tokenAddress, address _to, uint _amount) public onlyOwner { ERC20(_tokenAddress).safeTransfer(_to, _amount); } /// @notice If any Eth gets stuck in the contract owner can withdraw it /// @param _to Address of the receiver /// @param _amount The amount to be sent function transferEth(address payable _to, uint _amount) public onlyOwner { _to.transfer(_amount); } } contract CompBalance is Exponential, GasBurner { ComptrollerInterface public constant comp = ComptrollerInterface(0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B); address public constant COMP_ADDR = 0xc00e94Cb662C3520282E6f5717214004A7f26888; uint224 public constant compInitialIndex = 1e36; function claimComp(address _user, address[] memory _cTokensSupply, address[] memory _cTokensBorrow) public burnGas(8) { _claim(_user, _cTokensSupply, _cTokensBorrow); ERC20(COMP_ADDR).transfer(msg.sender, ERC20(COMP_ADDR).balanceOf(address(this))); } function _claim(address _user, address[] memory _cTokensSupply, address[] memory _cTokensBorrow) internal { address[] memory u = new address[](1); u[0] = _user; comp.claimComp(u, _cTokensSupply, false, true); comp.claimComp(u, _cTokensBorrow, true, false); } function getBalance(address _user, address[] memory _cTokens) public view returns (uint) { uint compBalance = 0; for(uint i = 0; i < _cTokens.length; ++i) { compBalance += getSuppyBalance(_cTokens[i], _user); compBalance += getBorrowBalance(_cTokens[i], _user); } compBalance += ERC20(COMP_ADDR).balanceOf(_user); return compBalance; } function getSuppyBalance(address _cToken, address _supplier) public view returns (uint supplierAccrued) { ComptrollerInterface.CompMarketState memory supplyState = comp.compSupplyState(_cToken); Double memory supplyIndex = Double({mantissa: supplyState.index}); Double memory supplierIndex = Double({mantissa: comp.compSupplierIndex(_cToken, _supplier)}); if (supplierIndex.mantissa == 0 && supplyIndex.mantissa > 0) { supplierIndex.mantissa = compInitialIndex; } Double memory deltaIndex = sub_(supplyIndex, supplierIndex); uint supplierTokens = CTokenInterface(_cToken).balanceOf(_supplier); uint supplierDelta = mul_(supplierTokens, deltaIndex); supplierAccrued = add_(comp.compAccrued(_supplier), supplierDelta); } function getBorrowBalance(address _cToken, address _borrower) public view returns (uint borrowerAccrued) { ComptrollerInterface.CompMarketState memory borrowState = comp.compBorrowState(_cToken); Double memory borrowIndex = Double({mantissa: borrowState.index}); Double memory borrowerIndex = Double({mantissa: comp.compBorrowerIndex(_cToken, _borrower)}); Exp memory marketBorrowIndex = Exp({mantissa: CTokenInterface(_cToken).borrowIndex()}); if (borrowerIndex.mantissa > 0) { Double memory deltaIndex = sub_(borrowIndex, borrowerIndex); uint borrowerAmount = div_(CTokenInterface(_cToken).borrowBalanceStored(_borrower), marketBorrowIndex); uint borrowerDelta = mul_(borrowerAmount, deltaIndex); borrowerAccrued = add_(comp.compAccrued(_borrower), borrowerDelta); } } } contract CompoundSaverHelper is DSMath, Exponential { using SafeERC20 for ERC20; address payable public constant WALLET_ADDR = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; address public constant DISCOUNT_ADDR = 0x1b14E8D511c9A4395425314f849bD737BAF8208F; uint public constant MANUAL_SERVICE_FEE = 400; // 0.25% Fee uint public constant AUTOMATIC_SERVICE_FEE = 333; // 0.3% Fee address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant CETH_ADDRESS = 0x4Ddc2D193948926D02f9B1fE9e1daa0718270ED5; address public constant COMPTROLLER = 0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B; address public constant COMPOUND_LOGGER = 0x3DD0CDf5fFA28C6847B4B276e2fD256046a44bb7; address public constant BOT_REGISTRY_ADDRESS = 0x637726f8b08a7ABE3aE3aCaB01A80E2d8ddeF77B; /// @notice Helper method to payback the Compound debt /// @dev If amount is bigger it will repay the whole debt and send the extra to the _user /// @param _amount Amount of tokens we want to repay /// @param _cBorrowToken Ctoken address we are repaying /// @param _borrowToken Token address we are repaying /// @param _user Owner of the compound position we are paying back function paybackDebt(uint _amount, address _cBorrowToken, address _borrowToken, address payable _user) internal { uint wholeDebt = CTokenInterface(_cBorrowToken).borrowBalanceCurrent(address(this)); if (_amount > wholeDebt) { if (_borrowToken == ETH_ADDRESS) { _user.transfer((_amount - wholeDebt)); } else { ERC20(_borrowToken).safeTransfer(_user, (_amount - wholeDebt)); } _amount = wholeDebt; } approveCToken(_borrowToken, _cBorrowToken); if (_borrowToken == ETH_ADDRESS) { CEtherInterface(_cBorrowToken).repayBorrow{value: _amount}(); } else { require(CTokenInterface(_cBorrowToken).repayBorrow(_amount) == 0); } } /// @notice Calculates the fee amount /// @param _amount Amount that is converted /// @param _user Actuall user addr not DSProxy /// @param _gasCost Ether amount of gas we are spending for tx /// @param _cTokenAddr CToken addr. of token we are getting for the fee /// @return feeAmount The amount we took for the fee function getFee(uint _amount, address _user, uint _gasCost, address _cTokenAddr) internal returns (uint feeAmount) { uint fee = MANUAL_SERVICE_FEE; if (BotRegistry(BOT_REGISTRY_ADDRESS).botList(tx.origin)) { fee = AUTOMATIC_SERVICE_FEE; } address tokenAddr = getUnderlyingAddr(_cTokenAddr); if (Discount(DISCOUNT_ADDR).isCustomFeeSet(_user)) { fee = Discount(DISCOUNT_ADDR).getCustomServiceFee(_user); } feeAmount = (fee == 0) ? 0 : (_amount / fee); if (_gasCost != 0) { address oracle = ComptrollerInterface(COMPTROLLER).oracle(); uint usdTokenPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(_cTokenAddr); uint ethPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(CETH_ADDRESS); uint tokenPriceInEth = wdiv(usdTokenPrice, ethPrice); _gasCost = wdiv(_gasCost, tokenPriceInEth); feeAmount = add(feeAmount, _gasCost); } // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } if (tokenAddr == ETH_ADDRESS) { WALLET_ADDR.transfer(feeAmount); } else { ERC20(tokenAddr).safeTransfer(WALLET_ADDR, feeAmount); } } /// @notice Calculates the gas cost of transaction and send it to wallet /// @param _amount Amount that is converted /// @param _gasCost Ether amount of gas we are spending for tx /// @param _cTokenAddr CToken addr. of token we are getting for the fee /// @return feeAmount The amount we took for the fee function getGasCost(uint _amount, uint _gasCost, address _cTokenAddr) internal returns (uint feeAmount) { address tokenAddr = getUnderlyingAddr(_cTokenAddr); if (_gasCost != 0) { address oracle = ComptrollerInterface(COMPTROLLER).oracle(); uint usdTokenPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(_cTokenAddr); uint ethPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(CETH_ADDRESS); uint tokenPriceInEth = wdiv(usdTokenPrice, ethPrice); feeAmount = wdiv(_gasCost, tokenPriceInEth); } // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } if (tokenAddr == ETH_ADDRESS) { WALLET_ADDR.transfer(feeAmount); } else { ERC20(tokenAddr).safeTransfer(WALLET_ADDR, feeAmount); } } /// @notice Enters the market for the collatera and borrow tokens /// @param _cTokenAddrColl Collateral address we are entering the market in /// @param _cTokenAddrBorrow Borrow address we are entering the market in function enterMarket(address _cTokenAddrColl, address _cTokenAddrBorrow) internal { address[] memory markets = new address[](2); markets[0] = _cTokenAddrColl; markets[1] = _cTokenAddrBorrow; ComptrollerInterface(COMPTROLLER).enterMarkets(markets); } /// @notice Approves CToken contract to pull underlying tokens from the DSProxy /// @param _tokenAddr Token we are trying to approve /// @param _cTokenAddr Address which will gain the approval function approveCToken(address _tokenAddr, address _cTokenAddr) internal { if (_tokenAddr != ETH_ADDRESS) { ERC20(_tokenAddr).safeApprove(_cTokenAddr, uint(-1)); } } /// @notice Returns the underlying address of the cToken asset /// @param _cTokenAddress cToken address /// @return Token address of the cToken specified function getUnderlyingAddr(address _cTokenAddress) internal returns (address) { if (_cTokenAddress == CETH_ADDRESS) { return ETH_ADDRESS; } else { return CTokenInterface(_cTokenAddress).underlying(); } } /// @notice Returns the owner of the DSProxy that called the contract function getUserAddress() internal view returns (address) { DSProxy proxy = DSProxy(uint160(address(this))); return proxy.owner(); } /// @notice Returns the maximum amount of collateral available to withdraw /// @dev Due to rounding errors the result is - 1% wei from the exact amount /// @param _cCollAddress Collateral we are getting the max value of /// @param _account Users account /// @return Returns the max. collateral amount in that token function getMaxCollateral(address _cCollAddress, address _account) public returns (uint) { (, uint liquidityInUsd, ) = ComptrollerInterface(COMPTROLLER).getAccountLiquidity(_account); uint usersBalance = CTokenInterface(_cCollAddress).balanceOfUnderlying(_account); address oracle = ComptrollerInterface(COMPTROLLER).oracle(); if (liquidityInUsd == 0) return usersBalance; CTokenInterface(_cCollAddress).accrueInterest(); (, uint collFactorMantissa) = ComptrollerInterface(COMPTROLLER).markets(_cCollAddress); Exp memory collateralFactor = Exp({mantissa: collFactorMantissa}); (, uint tokensToUsd) = divScalarByExpTruncate(liquidityInUsd, collateralFactor); uint usdPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(_cCollAddress); uint liqInToken = wdiv(tokensToUsd, usdPrice); if (liqInToken > usersBalance) return usersBalance; return sub(liqInToken, (liqInToken / 100)); // cut off 1% due to rounding issues } /// @notice Returns the maximum amount of borrow amount available /// @dev Due to rounding errors the result is - 1% wei from the exact amount /// @param _cBorrowAddress Borrow token we are getting the max value of /// @param _account Users account /// @return Returns the max. borrow amount in that token function getMaxBorrow(address _cBorrowAddress, address _account) public returns (uint) { (, uint liquidityInUsd, ) = ComptrollerInterface(COMPTROLLER).getAccountLiquidity(_account); address oracle = ComptrollerInterface(COMPTROLLER).oracle(); CTokenInterface(_cBorrowAddress).accrueInterest(); uint usdPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(_cBorrowAddress); uint liquidityInToken = wdiv(liquidityInUsd, usdPrice); return sub(liquidityInToken, (liquidityInToken / 100)); // cut off 1% due to rounding issues } } contract CompoundImportFlashLoan is FlashLoanReceiverBase { using SafeERC20 for ERC20; ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); address public constant COMPOUND_BORROW_PROXY = 0xb7EDC39bE76107e2Cc645f0f6a3D164f5e173Ee2; address public owner; constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public { owner = msg.sender; } /// @notice Called by Aave when sending back the FL amount /// @param _reserve The address of the borrowed token /// @param _amount Amount of FL tokens received /// @param _fee FL Aave fee /// @param _params The params that are sent from the original FL caller contract function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { ( address cCollateralToken, address cBorrowToken, address user, address proxy ) = abi.decode(_params, (address,address,address,address)); // approve FL tokens so we can repay them ERC20(_reserve).safeApprove(cBorrowToken, 0); ERC20(_reserve).safeApprove(cBorrowToken, uint(-1)); // repay compound debt require(CTokenInterface(cBorrowToken).repayBorrowBehalf(user, uint(-1)) == 0, "Repay borrow behalf fail"); // transfer cTokens to proxy uint cTokenBalance = CTokenInterface(cCollateralToken).balanceOf(user); require(CTokenInterface(cCollateralToken).transferFrom(user, proxy, cTokenBalance)); // borrow bytes memory proxyData = getProxyData(cCollateralToken, cBorrowToken, _reserve, (_amount + _fee)); DSProxyInterface(proxy).execute(COMPOUND_BORROW_PROXY, proxyData); // Repay the loan with the money DSProxy sent back transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); } /// @notice Formats function data call so we can call it through DSProxy /// @param _cCollToken CToken address of collateral /// @param _cBorrowToken CToken address we will borrow /// @param _borrowToken Token address we will borrow /// @param _amount Amount that will be borrowed /// @return proxyData Formated function call data function getProxyData(address _cCollToken, address _cBorrowToken, address _borrowToken, uint _amount) internal pure returns (bytes memory proxyData) { proxyData = abi.encodeWithSignature( "borrow(address,address,address,uint256)", _cCollToken, _cBorrowToken, _borrowToken, _amount); } function withdrawStuckFunds(address _tokenAddr, uint _amount) public { require(owner == msg.sender, "Must be owner"); if (_tokenAddr == 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE) { msg.sender.transfer(_amount); } else { ERC20(_tokenAddr).safeTransfer(owner, _amount); } } } contract CompoundImportTaker is CompoundSaverHelper, ProxyPermission, GasBurner { ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); address payable public constant COMPOUND_IMPORT_FLASH_LOAN = 0xaf9f8781A4c39Ce2122019fC05F22e3a662B0A32; address public constant PROXY_REGISTRY_ADDRESS = 0x4678f0a6958e4D2Bc4F1BAF7Bc52E8F3564f3fE4; DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); /// @notice Starts the process to move users position 1 collateral and 1 borrow /// @dev User must approve COMPOUND_IMPORT_FLASH_LOAN to pull _cCollateralToken /// @param _cCollateralToken Collateral we are moving to DSProxy /// @param _cBorrowToken Borrow token we are moving to DSProxy function importLoan(address _cCollateralToken, address _cBorrowToken) external burnGas(20) { address proxy = getProxy(); uint loanAmount = CTokenInterface(_cBorrowToken).borrowBalanceCurrent(msg.sender); bytes memory paramsData = abi.encode(_cCollateralToken, _cBorrowToken, msg.sender, proxy); givePermission(COMPOUND_IMPORT_FLASH_LOAN); lendingPool.flashLoan(COMPOUND_IMPORT_FLASH_LOAN, getUnderlyingAddr(_cBorrowToken), loanAmount, paramsData); removePermission(COMPOUND_IMPORT_FLASH_LOAN); logger.Log(address(this), msg.sender, "CompoundImport", abi.encode(loanAmount, 0, _cCollateralToken)); } /// @notice Gets proxy address, if user doesn't has DSProxy build it /// @return proxy DsProxy address function getProxy() internal returns (address proxy) { proxy = ProxyRegistryInterface(PROXY_REGISTRY_ADDRESS).proxies(msg.sender); if (proxy == address(0)) { proxy = ProxyRegistryInterface(PROXY_REGISTRY_ADDRESS).build(msg.sender); } } } contract CreamBasicProxy is GasBurner { address public constant ETH_ADDR = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant COMPTROLLER_ADDR = 0x3d5BC3c8d13dcB8bF317092d84783c2697AE9258; using SafeERC20 for ERC20; /// @notice User deposits tokens to the cream protocol /// @dev User needs to approve the DSProxy to pull the _tokenAddr tokens /// @param _tokenAddr The address of the token to be deposited /// @param _cTokenAddr CTokens to be deposited /// @param _amount Amount of tokens to be deposited /// @param _inMarket True if the token is already in market for that address function deposit(address _tokenAddr, address _cTokenAddr, uint _amount, bool _inMarket) public burnGas(5) payable { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(this), _amount); } approveToken(_tokenAddr, _cTokenAddr); if (!_inMarket) { enterMarket(_cTokenAddr); } if (_tokenAddr != ETH_ADDR) { require(CTokenInterface(_cTokenAddr).mint(_amount) == 0); } else { CEtherInterface(_cTokenAddr).mint{value: msg.value}(); // reverts on fail } } /// @notice User withdraws tokens to the cream protocol /// @param _tokenAddr The address of the token to be withdrawn /// @param _cTokenAddr CTokens to be withdrawn /// @param _amount Amount of tokens to be withdrawn /// @param _isCAmount If true _amount is cTokens if falls _amount is underlying tokens function withdraw(address _tokenAddr, address _cTokenAddr, uint _amount, bool _isCAmount) public burnGas(5) { if (_isCAmount) { require(CTokenInterface(_cTokenAddr).redeem(_amount) == 0); } else { require(CTokenInterface(_cTokenAddr).redeemUnderlying(_amount) == 0); } // withdraw funds to msg.sender if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransfer(msg.sender, ERC20(_tokenAddr).balanceOf(address(this))); } else { msg.sender.transfer(address(this).balance); } } /// @notice User borrows tokens to the cream protocol /// @param _tokenAddr The address of the token to be borrowed /// @param _cTokenAddr CTokens to be borrowed /// @param _amount Amount of tokens to be borrowed /// @param _inMarket True if the token is already in market for that address function borrow(address _tokenAddr, address _cTokenAddr, uint _amount, bool _inMarket) public burnGas(8) { if (!_inMarket) { enterMarket(_cTokenAddr); } require(CTokenInterface(_cTokenAddr).borrow(_amount) == 0); // withdraw funds to msg.sender if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransfer(msg.sender, ERC20(_tokenAddr).balanceOf(address(this))); } else { msg.sender.transfer(address(this).balance); } } /// @dev User needs to approve the DSProxy to pull the _tokenAddr tokens /// @notice User paybacks tokens to the cream protocol /// @param _tokenAddr The address of the token to be paybacked /// @param _cTokenAddr CTokens to be paybacked /// @param _amount Amount of tokens to be payedback /// @param _wholeDebt If true the _amount will be set to the whole amount of the debt function payback(address _tokenAddr, address _cTokenAddr, uint _amount, bool _wholeDebt) public burnGas(5) payable { approveToken(_tokenAddr, _cTokenAddr); if (_wholeDebt) { _amount = CTokenInterface(_cTokenAddr).borrowBalanceCurrent(address(this)); } if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(this), _amount); require(CTokenInterface(_cTokenAddr).repayBorrow(_amount) == 0); } else { CEtherInterface(_cTokenAddr).repayBorrow{value: msg.value}(); msg.sender.transfer(address(this).balance); // send back the extra eth } } /// @notice Helper method to withdraw tokens from the DSProxy /// @param _tokenAddr Address of the token to be withdrawn function withdrawTokens(address _tokenAddr) public { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransfer(msg.sender, ERC20(_tokenAddr).balanceOf(address(this))); } else { msg.sender.transfer(address(this).balance); } } /// @notice Enters the cream market so it can be deposited/borrowed /// @param _cTokenAddr CToken address of the token function enterMarket(address _cTokenAddr) public { address[] memory markets = new address[](1); markets[0] = _cTokenAddr; ComptrollerInterface(COMPTROLLER_ADDR).enterMarkets(markets); } /// @notice Exits the cream market so it can't be deposited/borrowed /// @param _cTokenAddr CToken address of the token function exitMarket(address _cTokenAddr) public { ComptrollerInterface(COMPTROLLER_ADDR).exitMarket(_cTokenAddr); } /// @notice Approves CToken contract to pull underlying tokens from the DSProxy /// @param _tokenAddr Token we are trying to approve /// @param _cTokenAddr Address which will gain the approval function approveToken(address _tokenAddr, address _cTokenAddr) internal { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeApprove(_cTokenAddr, uint(-1)); } } } contract CreamLoanInfo is CreamSafetyRatio { struct LoanData { address user; uint128 ratio; address[] collAddr; address[] borrowAddr; uint[] collAmounts; uint[] borrowAmounts; } struct TokenInfo { address cTokenAddress; address underlyingTokenAddress; uint collateralFactor; uint price; } struct TokenInfoFull { address underlyingTokenAddress; uint supplyRate; uint borrowRate; uint exchangeRate; uint marketLiquidity; uint totalSupply; uint totalBorrow; uint collateralFactor; uint price; } address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant CETH_ADDRESS = 0xD06527D5e56A3495252A528C4987003b712860eE; /// @notice Calcualted the ratio of coll/debt for a cream user /// @param _user Address of the user function getRatio(address _user) public view returns (uint) { // For each asset the account is in return getSafetyRatio(_user); } /// @notice Fetches cream prices for tokens /// @param _cTokens Arr. of cTokens for which to get the prices /// @return prices Array of prices function getPrices(address[] memory _cTokens) public view returns (uint[] memory prices) { prices = new uint[](_cTokens.length); address oracleAddr = comp.oracle(); for (uint i = 0; i < _cTokens.length; ++i) { prices[i] = CompoundOracleInterface(oracleAddr).getUnderlyingPrice(_cTokens[i]); } } /// @notice Fetches cream collateral factors for tokens /// @param _cTokens Arr. of cTokens for which to get the coll. factors /// @return collFactors Array of coll. factors function getCollFactors(address[] memory _cTokens) public view returns (uint[] memory collFactors) { collFactors = new uint[](_cTokens.length); for (uint i = 0; i < _cTokens.length; ++i) { (, collFactors[i]) = comp.markets(_cTokens[i]); } } /// @notice Fetches all the collateral/debt address and amounts, denominated in eth /// @param _user Address of the user /// @return data LoanData information function getLoanData(address _user) public view returns (LoanData memory data) { address[] memory assets = comp.getAssetsIn(_user); address oracleAddr = comp.oracle(); data = LoanData({ user: _user, ratio: 0, collAddr: new address[](assets.length), borrowAddr: new address[](assets.length), collAmounts: new uint[](assets.length), borrowAmounts: new uint[](assets.length) }); uint collPos = 0; uint borrowPos = 0; for (uint i = 0; i < assets.length; i++) { address asset = assets[i]; (, uint cTokenBalance, uint borrowBalance, uint exchangeRateMantissa) = CTokenInterface(asset).getAccountSnapshot(_user); Exp memory oraclePrice; if (cTokenBalance != 0 || borrowBalance != 0) { oraclePrice = Exp({mantissa: CompoundOracleInterface(oracleAddr).getUnderlyingPrice(asset)}); } // Sum up collateral in eth if (cTokenBalance != 0) { Exp memory exchangeRate = Exp({mantissa: exchangeRateMantissa}); (, Exp memory tokensToEth) = mulExp(exchangeRate, oraclePrice); data.collAddr[collPos] = asset; (, data.collAmounts[collPos]) = mulScalarTruncate(tokensToEth, cTokenBalance); collPos++; } // Sum up debt in eth if (borrowBalance != 0) { data.borrowAddr[borrowPos] = asset; (, data.borrowAmounts[borrowPos]) = mulScalarTruncate(oraclePrice, borrowBalance); borrowPos++; } } data.ratio = uint128(getSafetyRatio(_user)); return data; } function getTokenBalances(address _user, address[] memory _cTokens) public view returns (uint[] memory balances, uint[] memory borrows) { balances = new uint[](_cTokens.length); borrows = new uint[](_cTokens.length); for (uint i = 0; i < _cTokens.length; i++) { address asset = _cTokens[i]; (, uint cTokenBalance, uint borrowBalance, uint exchangeRateMantissa) = CTokenInterface(asset).getAccountSnapshot(_user); Exp memory exchangeRate = Exp({mantissa: exchangeRateMantissa}); (, balances[i]) = mulScalarTruncate(exchangeRate, cTokenBalance); borrows[i] = borrowBalance; } } /// @notice Fetches all the collateral/debt address and amounts, denominated in eth /// @param _users Addresses of the user /// @return loans Array of LoanData information function getLoanDataArr(address[] memory _users) public view returns (LoanData[] memory loans) { loans = new LoanData[](_users.length); for (uint i = 0; i < _users.length; ++i) { loans[i] = getLoanData(_users[i]); } } /// @notice Calcualted the ratio of coll/debt for a cream user /// @param _users Addresses of the user /// @return ratios Array of ratios function getRatios(address[] memory _users) public view returns (uint[] memory ratios) { ratios = new uint[](_users.length); for (uint i = 0; i < _users.length; ++i) { ratios[i] = getSafetyRatio(_users[i]); } } /// @notice Information about cTokens /// @param _cTokenAddresses Array of cTokens addresses /// @return tokens Array of cTokens infomartion function getTokensInfo(address[] memory _cTokenAddresses) public returns(TokenInfo[] memory tokens) { tokens = new TokenInfo[](_cTokenAddresses.length); address oracleAddr = comp.oracle(); for (uint i = 0; i < _cTokenAddresses.length; ++i) { (, uint collFactor) = comp.markets(_cTokenAddresses[i]); tokens[i] = TokenInfo({ cTokenAddress: _cTokenAddresses[i], underlyingTokenAddress: getUnderlyingAddr(_cTokenAddresses[i]), collateralFactor: collFactor, price: CompoundOracleInterface(oracleAddr).getUnderlyingPrice(_cTokenAddresses[i]) }); } } /// @notice Information about cTokens /// @param _cTokenAddresses Array of cTokens addresses /// @return tokens Array of cTokens infomartion function getFullTokensInfo(address[] memory _cTokenAddresses) public returns(TokenInfoFull[] memory tokens) { tokens = new TokenInfoFull[](_cTokenAddresses.length); address oracleAddr = comp.oracle(); for (uint i = 0; i < _cTokenAddresses.length; ++i) { (, uint collFactor) = comp.markets(_cTokenAddresses[i]); CTokenInterface cToken = CTokenInterface(_cTokenAddresses[i]); tokens[i] = TokenInfoFull({ underlyingTokenAddress: getUnderlyingAddr(_cTokenAddresses[i]), supplyRate: cToken.supplyRatePerBlock(), borrowRate: cToken.borrowRatePerBlock(), exchangeRate: cToken.exchangeRateCurrent(), marketLiquidity: cToken.getCash(), totalSupply: cToken.totalSupply(), totalBorrow: cToken.totalBorrowsCurrent(), collateralFactor: collFactor, price: CompoundOracleInterface(oracleAddr).getUnderlyingPrice(_cTokenAddresses[i]) }); } } /// @notice Returns the underlying address of the cToken asset /// @param _cTokenAddress cToken address /// @return Token address of the cToken specified function getUnderlyingAddr(address _cTokenAddress) internal returns (address) { if (_cTokenAddress == CETH_ADDRESS) { return ETH_ADDRESS; } else { return CTokenInterface(_cTokenAddress).underlying(); } } } contract CreamImportFlashLoan is FlashLoanReceiverBase { using SafeERC20 for ERC20; ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); address public constant CREAM_BORROW_PROXY = 0x87F198Ef6116CdBC5f36B581d212ad950b7e2Ddd; address public owner; constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public { owner = msg.sender; } /// @notice Called by Aave when sending back the FL amount /// @param _reserve The address of the borrowed token /// @param _amount Amount of FL tokens received /// @param _fee FL Aave fee /// @param _params The params that are sent from the original FL caller contract function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { ( address cCollateralToken, address cBorrowToken, address user, address proxy ) = abi.decode(_params, (address,address,address,address)); // approve FL tokens so we can repay them ERC20(_reserve).safeApprove(cBorrowToken, uint(-1)); // repay cream debt require(CTokenInterface(cBorrowToken).repayBorrowBehalf(user, uint(-1)) == 0, "Repay borrow behalf fail"); // transfer cTokens to proxy uint cTokenBalance = CTokenInterface(cCollateralToken).balanceOf(user); require(CTokenInterface(cCollateralToken).transferFrom(user, proxy, cTokenBalance)); // borrow bytes memory proxyData = getProxyData(cCollateralToken, cBorrowToken, _reserve, (_amount + _fee)); DSProxyInterface(proxy).execute(CREAM_BORROW_PROXY, proxyData); // Repay the loan with the money DSProxy sent back transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); } /// @notice Formats function data call so we can call it through DSProxy /// @param _cCollToken CToken address of collateral /// @param _cBorrowToken CToken address we will borrow /// @param _borrowToken Token address we will borrow /// @param _amount Amount that will be borrowed /// @return proxyData Formated function call data function getProxyData(address _cCollToken, address _cBorrowToken, address _borrowToken, uint _amount) internal pure returns (bytes memory proxyData) { proxyData = abi.encodeWithSignature( "borrow(address,address,address,uint256)", _cCollToken, _cBorrowToken, _borrowToken, _amount); } function withdrawStuckFunds(address _tokenAddr, uint _amount) public { require(owner == msg.sender, "Must be owner"); if (_tokenAddr == 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE) { msg.sender.transfer(_amount); } else { ERC20(_tokenAddr).safeTransfer(owner, _amount); } } } contract CreamImportTaker is CreamSaverHelper, ProxyPermission, GasBurner { ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); address payable public constant CREAM_IMPORT_FLASH_LOAN = 0x24F4aC0Fe758c45cf8425D8Fbdd608cca9A7dBf8; address public constant PROXY_REGISTRY_ADDRESS = 0x4678f0a6958e4D2Bc4F1BAF7Bc52E8F3564f3fE4; DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); /// @notice Starts the process to move users position 1 collateral and 1 borrow /// @dev User must approve cream_IMPORT_FLASH_LOAN to pull _cCollateralToken /// @param _cCollateralToken Collateral we are moving to DSProxy /// @param _cBorrowToken Borrow token we are moving to DSProxy function importLoan(address _cCollateralToken, address _cBorrowToken) external burnGas(20) { address proxy = getProxy(); uint loanAmount = CTokenInterface(_cBorrowToken).borrowBalanceCurrent(msg.sender); bytes memory paramsData = abi.encode(_cCollateralToken, _cBorrowToken, msg.sender, proxy); givePermission(CREAM_IMPORT_FLASH_LOAN); lendingPool.flashLoan(CREAM_IMPORT_FLASH_LOAN, getUnderlyingAddr(_cBorrowToken), loanAmount, paramsData); removePermission(CREAM_IMPORT_FLASH_LOAN); logger.Log(address(this), msg.sender, "CreamImport", abi.encode(loanAmount, 0, _cCollateralToken)); } /// @notice Gets proxy address, if user doesn't has DSProxy build it /// @return proxy DsProxy address function getProxy() internal returns (address proxy) { proxy = ProxyRegistryInterface(PROXY_REGISTRY_ADDRESS).proxies(msg.sender); if (proxy == address(0)) { proxy = ProxyRegistryInterface(PROXY_REGISTRY_ADDRESS).build(msg.sender); } } } contract SaverExchangeCore is SaverExchangeHelper, DSMath { // first is empty to keep the legacy order in place enum ExchangeType { _, OASIS, KYBER, UNISWAP, ZEROX } enum ActionType { SELL, BUY } struct ExchangeData { address srcAddr; address destAddr; uint srcAmount; uint destAmount; uint minPrice; address wrapper; address exchangeAddr; bytes callData; uint256 price0x; } /// @notice Internal method that preforms a sell on 0x/on-chain /// @dev Usefull for other DFS contract to integrate for exchanging /// @param exData Exchange data struct /// @return (address, uint) Address of the wrapper used and destAmount function _sell(ExchangeData memory exData) internal returns (address, uint) { address wrapper; uint swapedTokens; bool success; uint tokensLeft = exData.srcAmount; // if selling eth, convert to weth if (exData.srcAddr == KYBER_ETH_ADDRESS) { exData.srcAddr = ethToWethAddr(exData.srcAddr); TokenInterface(WETH_ADDRESS).deposit.value(exData.srcAmount)(); } // Try 0x first and then fallback on specific wrapper if (exData.price0x > 0) { approve0xProxy(exData.srcAddr, exData.srcAmount); uint ethAmount = getProtocolFee(exData.srcAddr, exData.srcAmount); (success, swapedTokens, tokensLeft) = takeOrder(exData, ethAmount, ActionType.SELL); if (success) { wrapper = exData.exchangeAddr; } } // fallback to desired wrapper if 0x failed if (!success) { swapedTokens = saverSwap(exData, ActionType.SELL); wrapper = exData.wrapper; } require(getBalance(exData.destAddr) >= wmul(exData.minPrice, exData.srcAmount), "Final amount isn't correct"); // if anything is left in weth, pull it to user as eth if (getBalance(WETH_ADDRESS) > 0) { TokenInterface(WETH_ADDRESS).withdraw( TokenInterface(WETH_ADDRESS).balanceOf(address(this)) ); } return (wrapper, swapedTokens); } /// @notice Internal method that preforms a buy on 0x/on-chain /// @dev Usefull for other DFS contract to integrate for exchanging /// @param exData Exchange data struct /// @return (address, uint) Address of the wrapper used and srcAmount function _buy(ExchangeData memory exData) internal returns (address, uint) { address wrapper; uint swapedTokens; bool success; require(exData.destAmount != 0, "Dest amount must be specified"); // if selling eth, convert to weth if (exData.srcAddr == KYBER_ETH_ADDRESS) { exData.srcAddr = ethToWethAddr(exData.srcAddr); TokenInterface(WETH_ADDRESS).deposit.value(exData.srcAmount)(); } if (exData.price0x > 0) { approve0xProxy(exData.srcAddr, exData.srcAmount); uint ethAmount = getProtocolFee(exData.srcAddr, exData.srcAmount); (success, swapedTokens,) = takeOrder(exData, ethAmount, ActionType.BUY); if (success) { wrapper = exData.exchangeAddr; } } // fallback to desired wrapper if 0x failed if (!success) { swapedTokens = saverSwap(exData, ActionType.BUY); wrapper = exData.wrapper; } require(getBalance(exData.destAddr) >= exData.destAmount, "Final amount isn't correct"); // if anything is left in weth, pull it to user as eth if (getBalance(WETH_ADDRESS) > 0) { TokenInterface(WETH_ADDRESS).withdraw( TokenInterface(WETH_ADDRESS).balanceOf(address(this)) ); } return (wrapper, getBalance(exData.destAddr)); } /// @notice Takes order from 0x and returns bool indicating if it is successful /// @param _exData Exchange data /// @param _ethAmount Ether fee needed for 0x order function takeOrder( ExchangeData memory _exData, uint256 _ethAmount, ActionType _type ) private returns (bool success, uint256, uint256) { // write in the exact amount we are selling/buing in an order if (_type == ActionType.SELL) { writeUint256(_exData.callData, 36, _exData.srcAmount); } else { writeUint256(_exData.callData, 36, _exData.destAmount); } if (ZrxAllowlist(ZRX_ALLOWLIST_ADDR).isNonPayableAddr(_exData.exchangeAddr)) { _ethAmount = 0; } uint256 tokensBefore = getBalance(_exData.destAddr); if (ZrxAllowlist(ZRX_ALLOWLIST_ADDR).isZrxAddr(_exData.exchangeAddr)) { (success, ) = _exData.exchangeAddr.call{value: _ethAmount}(_exData.callData); } else { success = false; } uint256 tokensSwaped = 0; uint256 tokensLeft = _exData.srcAmount; if (success) { // check to see if any _src tokens are left over after exchange tokensLeft = getBalance(_exData.srcAddr); // convert weth -> eth if needed if (_exData.destAddr == KYBER_ETH_ADDRESS) { TokenInterface(WETH_ADDRESS).withdraw( TokenInterface(WETH_ADDRESS).balanceOf(address(this)) ); } // get the current balance of the swaped tokens tokensSwaped = getBalance(_exData.destAddr) - tokensBefore; } return (success, tokensSwaped, tokensLeft); } /// @notice Calls wraper contract for exchage to preform an on-chain swap /// @param _exData Exchange data struct /// @param _type Type of action SELL|BUY /// @return swapedTokens For Sell that the destAmount, for Buy thats the srcAmount function saverSwap(ExchangeData memory _exData, ActionType _type) internal returns (uint swapedTokens) { require(SaverExchangeRegistry(SAVER_EXCHANGE_REGISTRY).isWrapper(_exData.wrapper), "Wrapper is not valid"); uint ethValue = 0; ERC20(_exData.srcAddr).safeTransfer(_exData.wrapper, _exData.srcAmount); if (_type == ActionType.SELL) { swapedTokens = ExchangeInterfaceV2(_exData.wrapper). sell{value: ethValue}(_exData.srcAddr, _exData.destAddr, _exData.srcAmount); } else { swapedTokens = ExchangeInterfaceV2(_exData.wrapper). buy{value: ethValue}(_exData.srcAddr, _exData.destAddr, _exData.destAmount); } } function writeUint256(bytes memory _b, uint256 _index, uint _input) internal pure { if (_b.length < _index + 32) { revert("Incorrent lengt while writting bytes32"); } bytes32 input = bytes32(_input); _index += 32; // Read the bytes32 from array memory assembly { mstore(add(_b, _index), input) } } /// @notice Converts Kybers Eth address -> Weth /// @param _src Input address function ethToWethAddr(address _src) internal pure returns (address) { return _src == KYBER_ETH_ADDRESS ? WETH_ADDRESS : _src; } /// @notice Calculates protocol fee /// @param _srcAddr selling token address (if eth should be WETH) /// @param _srcAmount amount we are selling function getProtocolFee(address _srcAddr, uint256 _srcAmount) internal view returns(uint256) { // if we are not selling ETH msg value is always the protocol fee if (_srcAddr != WETH_ADDRESS) return address(this).balance; // if msg value is larger than srcAmount, that means that msg value is protocol fee + srcAmount, so we subsctract srcAmount from msg value // we have an edge case here when protocol fee is higher than selling amount if (address(this).balance > _srcAmount) return address(this).balance - _srcAmount; // if msg value is lower than src amount, that means that srcAmount isn't included in msg value, so we return msg value return address(this).balance; } function packExchangeData(ExchangeData memory _exData) public pure returns(bytes memory) { // splitting in two different bytes and encoding all because of stack too deep in decoding part bytes memory part1 = abi.encode( _exData.srcAddr, _exData.destAddr, _exData.srcAmount, _exData.destAmount ); bytes memory part2 = abi.encode( _exData.minPrice, _exData.wrapper, _exData.exchangeAddr, _exData.callData, _exData.price0x ); return abi.encode(part1, part2); } function unpackExchangeData(bytes memory _data) public pure returns(ExchangeData memory _exData) { ( bytes memory part1, bytes memory part2 ) = abi.decode(_data, (bytes,bytes)); ( _exData.srcAddr, _exData.destAddr, _exData.srcAmount, _exData.destAmount ) = abi.decode(part1, (address,address,uint256,uint256)); ( _exData.minPrice, _exData.wrapper, _exData.exchangeAddr, _exData.callData, _exData.price0x ) = abi.decode(part2, (uint256,address,address,bytes,uint256)); } // solhint-disable-next-line no-empty-blocks receive() external virtual payable {} } contract KyberWrapper is DSMath, ExchangeInterfaceV2, AdminAuth { address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant KYBER_INTERFACE = 0x9AAb3f75489902f3a48495025729a0AF77d4b11e; address payable public constant WALLET_ID = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; using SafeERC20 for ERC20; /// @notice Sells a _srcAmount of tokens at Kyber /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Destination amount function sell(address _srcAddr, address _destAddr, uint _srcAmount) external override payable returns (uint) { ERC20 srcToken = ERC20(_srcAddr); ERC20 destToken = ERC20(_destAddr); KyberNetworkProxyInterface kyberNetworkProxy = KyberNetworkProxyInterface(KYBER_INTERFACE); if (_srcAddr != KYBER_ETH_ADDRESS) { srcToken.safeApprove(address(kyberNetworkProxy), _srcAmount); } uint destAmount = kyberNetworkProxy.trade{value: msg.value}( srcToken, _srcAmount, destToken, msg.sender, uint(-1), 0, WALLET_ID ); return destAmount; } /// @notice Buys a _destAmount of tokens at Kyber /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint srcAmount function buy(address _srcAddr, address _destAddr, uint _destAmount) external override payable returns(uint) { ERC20 srcToken = ERC20(_srcAddr); ERC20 destToken = ERC20(_destAddr); uint srcAmount = 0; if (_srcAddr != KYBER_ETH_ADDRESS) { srcAmount = srcToken.balanceOf(address(this)); } else { srcAmount = msg.value; } KyberNetworkProxyInterface kyberNetworkProxy = KyberNetworkProxyInterface(KYBER_INTERFACE); if (_srcAddr != KYBER_ETH_ADDRESS) { srcToken.safeApprove(address(kyberNetworkProxy), srcAmount); } uint destAmount = kyberNetworkProxy.trade{value: msg.value}( srcToken, srcAmount, destToken, msg.sender, _destAmount, 0, WALLET_ID ); require(destAmount == _destAmount, "Wrong dest amount"); uint srcAmountAfter = 0; if (_srcAddr != KYBER_ETH_ADDRESS) { srcAmountAfter = srcToken.balanceOf(address(this)); } else { srcAmountAfter = address(this).balance; } // Send the leftover from the source token back sendLeftOver(_srcAddr); return (srcAmount - srcAmountAfter); } /// @notice Return a rate for which we can sell an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return rate Rate function getSellRate(address _srcAddr, address _destAddr, uint _srcAmount) public override view returns (uint rate) { (rate, ) = KyberNetworkProxyInterface(KYBER_INTERFACE) .getExpectedRate(ERC20(_srcAddr), ERC20(_destAddr), _srcAmount); // multiply with decimal difference in src token rate = rate * (10**(18 - getDecimals(_srcAddr))); // divide with decimal difference in dest token rate = rate / (10**(18 - getDecimals(_destAddr))); } /// @notice Return a rate for which we can buy an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return rate Rate function getBuyRate(address _srcAddr, address _destAddr, uint _destAmount) public override view returns (uint rate) { uint256 srcRate = getSellRate(_destAddr, _srcAddr, _destAmount); uint256 srcAmount = wmul(srcRate, _destAmount); rate = getSellRate(_srcAddr, _destAddr, srcAmount); // increase rate by 3% too account for inaccuracy between sell/buy conversion rate = rate + (rate / 30); } /// @notice Send any leftover tokens, we use to clear out srcTokens after buy /// @param _srcAddr Source token address function sendLeftOver(address _srcAddr) internal { msg.sender.transfer(address(this).balance); if (_srcAddr != KYBER_ETH_ADDRESS) { ERC20(_srcAddr).safeTransfer(msg.sender, ERC20(_srcAddr).balanceOf(address(this))); } } receive() payable external {} function getDecimals(address _token) internal view returns (uint256) { if (_token == KYBER_ETH_ADDRESS) return 18; return ERC20(_token).decimals(); } } contract OasisTradeWrapper is DSMath, ExchangeInterfaceV2, AdminAuth { using SafeERC20 for ERC20; address public constant OTC_ADDRESS = 0x794e6e91555438aFc3ccF1c5076A74F42133d08D; address public constant WETH_ADDRESS = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; /// @notice Sells a _srcAmount of tokens at Oasis /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Destination amount function sell(address _srcAddr, address _destAddr, uint _srcAmount) external override payable returns (uint) { address srcAddr = ethToWethAddr(_srcAddr); address destAddr = ethToWethAddr(_destAddr); ERC20(srcAddr).safeApprove(OTC_ADDRESS, _srcAmount); uint destAmount = OasisInterface(OTC_ADDRESS).sellAllAmount(srcAddr, _srcAmount, destAddr, 0); // convert weth -> eth and send back if (destAddr == WETH_ADDRESS) { TokenInterface(WETH_ADDRESS).withdraw(destAmount); msg.sender.transfer(destAmount); } else { ERC20(destAddr).safeTransfer(msg.sender, destAmount); } return destAmount; } /// @notice Buys a _destAmount of tokens at Oasis /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint srcAmount function buy(address _srcAddr, address _destAddr, uint _destAmount) external override payable returns(uint) { address srcAddr = ethToWethAddr(_srcAddr); address destAddr = ethToWethAddr(_destAddr); ERC20(srcAddr).safeApprove(OTC_ADDRESS, uint(-1)); uint srcAmount = OasisInterface(OTC_ADDRESS).buyAllAmount(destAddr, _destAmount, srcAddr, uint(-1)); // convert weth -> eth and send back if (destAddr == WETH_ADDRESS) { TokenInterface(WETH_ADDRESS).withdraw(_destAmount); msg.sender.transfer(_destAmount); } else { ERC20(destAddr).safeTransfer(msg.sender, _destAmount); } // Send the leftover from the source token back sendLeftOver(srcAddr); return srcAmount; } /// @notice Return a rate for which we can sell an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Rate function getSellRate(address _srcAddr, address _destAddr, uint _srcAmount) public override view returns (uint) { address srcAddr = ethToWethAddr(_srcAddr); address destAddr = ethToWethAddr(_destAddr); return wdiv(OasisInterface(OTC_ADDRESS).getBuyAmount(destAddr, srcAddr, _srcAmount), _srcAmount); } /// @notice Return a rate for which we can buy an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint Rate function getBuyRate(address _srcAddr, address _destAddr, uint _destAmount) public override view returns (uint) { address srcAddr = ethToWethAddr(_srcAddr); address destAddr = ethToWethAddr(_destAddr); return wdiv(1 ether, wdiv(OasisInterface(OTC_ADDRESS).getPayAmount(srcAddr, destAddr, _destAmount), _destAmount)); } /// @notice Send any leftover tokens, we use to clear out srcTokens after buy /// @param _srcAddr Source token address function sendLeftOver(address _srcAddr) internal { msg.sender.transfer(address(this).balance); if (_srcAddr != KYBER_ETH_ADDRESS) { ERC20(_srcAddr).safeTransfer(msg.sender, ERC20(_srcAddr).balanceOf(address(this))); } } /// @notice Converts Kybers Eth address -> Weth /// @param _src Input address function ethToWethAddr(address _src) internal pure returns (address) { return _src == KYBER_ETH_ADDRESS ? WETH_ADDRESS : _src; } receive() payable external {} } contract UniswapV2Wrapper is DSMath, ExchangeInterfaceV2, AdminAuth { address public constant WETH_ADDRESS = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; UniswapRouterInterface public constant router = UniswapRouterInterface(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D); using SafeERC20 for ERC20; /// @notice Sells a _srcAmount of tokens at UniswapV2 /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Destination amount function sell(address _srcAddr, address _destAddr, uint _srcAmount) external payable override returns (uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); uint[] memory amounts; address[] memory path = new address[](2); path[0] = _srcAddr; path[1] = _destAddr; ERC20(_srcAddr).safeApprove(address(router), _srcAmount); // if we are buying ether if (_destAddr == WETH_ADDRESS) { amounts = router.swapExactTokensForETH(_srcAmount, 1, path, msg.sender, block.timestamp + 1); } // if we are selling token to token else { amounts = router.swapExactTokensForTokens(_srcAmount, 1, path, msg.sender, block.timestamp + 1); } return amounts[amounts.length - 1]; } /// @notice Buys a _destAmount of tokens at UniswapV2 /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint srcAmount function buy(address _srcAddr, address _destAddr, uint _destAmount) external override payable returns(uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); uint[] memory amounts; address[] memory path = new address[](2); path[0] = _srcAddr; path[1] = _destAddr; ERC20(_srcAddr).safeApprove(address(router), uint(-1)); // if we are buying ether if (_destAddr == WETH_ADDRESS) { amounts = router.swapTokensForExactETH(_destAmount, uint(-1), path, msg.sender, block.timestamp + 1); } // if we are buying token to token else { amounts = router.swapTokensForExactTokens(_destAmount, uint(-1), path, msg.sender, block.timestamp + 1); } // Send the leftover from the source token back sendLeftOver(_srcAddr); return amounts[0]; } /// @notice Return a rate for which we can sell an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Rate function getSellRate(address _srcAddr, address _destAddr, uint _srcAmount) public override view returns (uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); address[] memory path = new address[](2); path[0] = _srcAddr; path[1] = _destAddr; uint[] memory amounts = router.getAmountsOut(_srcAmount, path); return wdiv(amounts[amounts.length - 1], _srcAmount); } /// @notice Return a rate for which we can buy an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint Rate function getBuyRate(address _srcAddr, address _destAddr, uint _destAmount) public override view returns (uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); address[] memory path = new address[](2); path[0] = _srcAddr; path[1] = _destAddr; uint[] memory amounts = router.getAmountsIn(_destAmount, path); return wdiv(_destAmount, amounts[0]); } /// @notice Send any leftover tokens, we use to clear out srcTokens after buy /// @param _srcAddr Source token address function sendLeftOver(address _srcAddr) internal { msg.sender.transfer(address(this).balance); if (_srcAddr != KYBER_ETH_ADDRESS) { ERC20(_srcAddr).safeTransfer(msg.sender, ERC20(_srcAddr).balanceOf(address(this))); } } /// @notice Converts Kybers Eth address -> Weth /// @param _src Input address function ethToWethAddr(address _src) internal pure returns (address) { return _src == KYBER_ETH_ADDRESS ? WETH_ADDRESS : _src; } function getDecimals(address _token) internal view returns (uint256) { if (_token == KYBER_ETH_ADDRESS) return 18; return ERC20(_token).decimals(); } receive() payable external {} } contract UniswapWrapper is DSMath, ExchangeInterfaceV2, AdminAuth { address public constant WETH_ADDRESS = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant UNISWAP_FACTORY = 0xc0a47dFe034B400B47bDaD5FecDa2621de6c4d95; using SafeERC20 for ERC20; /// @notice Sells a _srcAmount of tokens at Uniswap /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Destination amount function sell(address _srcAddr, address _destAddr, uint _srcAmount) external payable override returns (uint) { address uniswapExchangeAddr; uint destAmount; _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); // if we are buying ether if (_destAddr == WETH_ADDRESS) { uniswapExchangeAddr = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr); ERC20(_srcAddr).safeApprove(uniswapExchangeAddr, _srcAmount); destAmount = UniswapExchangeInterface(uniswapExchangeAddr). tokenToEthTransferInput(_srcAmount, 1, block.timestamp + 1, msg.sender); } // if we are selling token to token else { uniswapExchangeAddr = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr); ERC20(_srcAddr).safeApprove(uniswapExchangeAddr, _srcAmount); destAmount = UniswapExchangeInterface(uniswapExchangeAddr). tokenToTokenTransferInput(_srcAmount, 1, 1, block.timestamp + 1, msg.sender, _destAddr); } return destAmount; } /// @notice Buys a _destAmount of tokens at Uniswap /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint srcAmount function buy(address _srcAddr, address _destAddr, uint _destAmount) external override payable returns(uint) { address uniswapExchangeAddr; uint srcAmount; _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); // if we are buying ether if (_destAddr == WETH_ADDRESS) { uniswapExchangeAddr = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr); ERC20(_srcAddr).safeApprove(uniswapExchangeAddr, uint(-1)); srcAmount = UniswapExchangeInterface(uniswapExchangeAddr). tokenToEthTransferOutput(_destAmount, uint(-1), block.timestamp + 1, msg.sender); } // if we are buying token to token else { uniswapExchangeAddr = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr); ERC20(_srcAddr).safeApprove(uniswapExchangeAddr, uint(-1)); srcAmount = UniswapExchangeInterface(uniswapExchangeAddr). tokenToTokenTransferOutput(_destAmount, uint(-1), uint(-1), block.timestamp + 1, msg.sender, _destAddr); } // Send the leftover from the source token back sendLeftOver(_srcAddr); return srcAmount; } /// @notice Return a rate for which we can sell an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Rate function getSellRate(address _srcAddr, address _destAddr, uint _srcAmount) public override view returns (uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); if(_srcAddr == WETH_ADDRESS) { address uniswapTokenAddress = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_destAddr); return wdiv(UniswapExchangeInterface(uniswapTokenAddress).getEthToTokenInputPrice(_srcAmount), _srcAmount); } else if (_destAddr == WETH_ADDRESS) { address uniswapTokenAddress = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr); return wdiv(UniswapExchangeInterface(uniswapTokenAddress).getTokenToEthInputPrice(_srcAmount), _srcAmount); } else { uint ethBought = UniswapExchangeInterface(UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr)).getTokenToEthInputPrice(_srcAmount); return wdiv(UniswapExchangeInterface(UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_destAddr)).getEthToTokenInputPrice(ethBought), _srcAmount); } } /// @notice Return a rate for which we can buy an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint Rate function getBuyRate(address _srcAddr, address _destAddr, uint _destAmount) public override view returns (uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); if(_srcAddr == WETH_ADDRESS) { address uniswapTokenAddress = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_destAddr); return wdiv(1 ether, wdiv(UniswapExchangeInterface(uniswapTokenAddress).getEthToTokenOutputPrice(_destAmount), _destAmount)); } else if (_destAddr == WETH_ADDRESS) { address uniswapTokenAddress = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr); return wdiv(1 ether, wdiv(UniswapExchangeInterface(uniswapTokenAddress).getTokenToEthOutputPrice(_destAmount), _destAmount)); } else { uint ethNeeded = UniswapExchangeInterface(UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_destAddr)).getTokenToEthOutputPrice(_destAmount); return wdiv(1 ether, wdiv(UniswapExchangeInterface(UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr)).getEthToTokenOutputPrice(ethNeeded), _destAmount)); } } /// @notice Send any leftover tokens, we use to clear out srcTokens after buy /// @param _srcAddr Source token address function sendLeftOver(address _srcAddr) internal { msg.sender.transfer(address(this).balance); if (_srcAddr != KYBER_ETH_ADDRESS) { ERC20(_srcAddr).safeTransfer(msg.sender, ERC20(_srcAddr).balanceOf(address(this))); } } /// @notice Converts Kybers Eth address -> Weth /// @param _src Input address function ethToWethAddr(address _src) internal pure returns (address) { return _src == KYBER_ETH_ADDRESS ? WETH_ADDRESS : _src; } receive() payable external {} } contract DFSExchangeCore is DFSExchangeHelper, DSMath, DFSExchangeData { string public constant ERR_SLIPPAGE_HIT = "Slippage hit"; string public constant ERR_DEST_AMOUNT_MISSING = "Dest amount missing"; string public constant ERR_WRAPPER_INVALID = "Wrapper invalid"; string public constant ERR_OFFCHAIN_DATA_INVALID = "Offchain data invalid"; /// @notice Internal method that preforms a sell on 0x/on-chain /// @dev Usefull for other DFS contract to integrate for exchanging /// @param exData Exchange data struct /// @return (address, uint) Address of the wrapper used and destAmount function _sell(ExchangeData memory exData) internal returns (address, uint) { address wrapper; uint swapedTokens; bool success; // if selling eth, convert to weth if (exData.srcAddr == KYBER_ETH_ADDRESS) { exData.srcAddr = ethToWethAddr(exData.srcAddr); TokenInterface(WETH_ADDRESS).deposit.value(exData.srcAmount)(); } exData.srcAmount -= getFee(exData.srcAmount, exData.user, exData.srcAddr, exData.dfsFeeDivider); // Try 0x first and then fallback on specific wrapper if (exData.offchainData.price > 0) { (success, swapedTokens) = takeOrder(exData, ActionType.SELL); if (success) { wrapper = exData.offchainData.exchangeAddr; } } // fallback to desired wrapper if 0x failed if (!success) { swapedTokens = saverSwap(exData, ActionType.SELL); wrapper = exData.wrapper; } require(getBalance(exData.destAddr) >= wmul(exData.minPrice, exData.srcAmount), ERR_SLIPPAGE_HIT); // if anything is left in weth, pull it to user as eth if (getBalance(WETH_ADDRESS) > 0) { TokenInterface(WETH_ADDRESS).withdraw( TokenInterface(WETH_ADDRESS).balanceOf(address(this)) ); } return (wrapper, swapedTokens); } /// @notice Internal method that preforms a buy on 0x/on-chain /// @dev Usefull for other DFS contract to integrate for exchanging /// @param exData Exchange data struct /// @return (address, uint) Address of the wrapper used and srcAmount function _buy(ExchangeData memory exData) internal returns (address, uint) { address wrapper; uint swapedTokens; bool success; require(exData.destAmount != 0, ERR_DEST_AMOUNT_MISSING); exData.srcAmount -= getFee(exData.srcAmount, exData.user, exData.srcAddr, exData.dfsFeeDivider); // if selling eth, convert to weth if (exData.srcAddr == KYBER_ETH_ADDRESS) { exData.srcAddr = ethToWethAddr(exData.srcAddr); TokenInterface(WETH_ADDRESS).deposit.value(exData.srcAmount)(); } if (exData.offchainData.price > 0) { (success, swapedTokens) = takeOrder(exData, ActionType.BUY); if (success) { wrapper = exData.offchainData.exchangeAddr; } } // fallback to desired wrapper if 0x failed if (!success) { swapedTokens = saverSwap(exData, ActionType.BUY); wrapper = exData.wrapper; } require(getBalance(exData.destAddr) >= exData.destAmount, ERR_SLIPPAGE_HIT); // if anything is left in weth, pull it to user as eth if (getBalance(WETH_ADDRESS) > 0) { TokenInterface(WETH_ADDRESS).withdraw( TokenInterface(WETH_ADDRESS).balanceOf(address(this)) ); } return (wrapper, getBalance(exData.destAddr)); } /// @notice Takes order from 0x and returns bool indicating if it is successful /// @param _exData Exchange data function takeOrder( ExchangeData memory _exData, ActionType _type ) private returns (bool success, uint256) { if (_exData.srcAddr != KYBER_ETH_ADDRESS) { ERC20(_exData.srcAddr).safeApprove(_exData.offchainData.allowanceTarget, _exData.srcAmount); } // write in the exact amount we are selling/buing in an order if (_type == ActionType.SELL) { writeUint256(_exData.offchainData.callData, 36, _exData.srcAmount); } else { writeUint256(_exData.offchainData.callData, 36, _exData.destAmount); } uint256 tokensBefore = getBalance(_exData.destAddr); if (ZrxAllowlist(ZRX_ALLOWLIST_ADDR).isZrxAddr(_exData.offchainData.exchangeAddr)) { (success, ) = _exData.offchainData.exchangeAddr.call{value: _exData.offchainData.protocolFee}(_exData.offchainData.callData); } else { success = false; } uint256 tokensSwaped = 0; if (success) { // convert weth -> eth if needed if (_exData.destAddr == KYBER_ETH_ADDRESS) { TokenInterface(WETH_ADDRESS).withdraw( TokenInterface(WETH_ADDRESS).balanceOf(address(this)) ); } // get the current balance of the swaped tokens tokensSwaped = getBalance(_exData.destAddr) - tokensBefore; } return (success, tokensSwaped); } /// @notice Calls wraper contract for exchage to preform an on-chain swap /// @param _exData Exchange data struct /// @param _type Type of action SELL|BUY /// @return swapedTokens For Sell that the destAmount, for Buy thats the srcAmount function saverSwap(ExchangeData memory _exData, ActionType _type) internal returns (uint swapedTokens) { require(SaverExchangeRegistry(SAVER_EXCHANGE_REGISTRY).isWrapper(_exData.wrapper), ERR_WRAPPER_INVALID); ERC20(_exData.srcAddr).safeTransfer(_exData.wrapper, _exData.srcAmount); if (_type == ActionType.SELL) { swapedTokens = ExchangeInterfaceV3(_exData.wrapper). sell(_exData.srcAddr, _exData.destAddr, _exData.srcAmount, _exData.wrapperData); } else { swapedTokens = ExchangeInterfaceV3(_exData.wrapper). buy(_exData.srcAddr, _exData.destAddr, _exData.destAmount, _exData.wrapperData); } } function writeUint256(bytes memory _b, uint256 _index, uint _input) internal pure { if (_b.length < _index + 32) { revert(ERR_OFFCHAIN_DATA_INVALID); } bytes32 input = bytes32(_input); _index += 32; // Read the bytes32 from array memory assembly { mstore(add(_b, _index), input) } } /// @notice Converts Kybers Eth address -> Weth /// @param _src Input address function ethToWethAddr(address _src) internal pure returns (address) { return _src == KYBER_ETH_ADDRESS ? WETH_ADDRESS : _src; } // solhint-disable-next-line no-empty-blocks receive() external virtual payable {} } contract KyberWrapperV3 is DSMath, ExchangeInterfaceV3, AdminAuth { address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant KYBER_INTERFACE = 0x9AAb3f75489902f3a48495025729a0AF77d4b11e; address payable public constant WALLET_ID = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; using SafeERC20 for ERC20; /// @notice Sells a _srcAmount of tokens at Kyber /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Destination amount function sell(address _srcAddr, address _destAddr, uint _srcAmount, bytes memory _additionalData) external override payable returns (uint) { ERC20 srcToken = ERC20(_srcAddr); ERC20 destToken = ERC20(_destAddr); KyberNetworkProxyInterface kyberNetworkProxy = KyberNetworkProxyInterface(KYBER_INTERFACE); if (_srcAddr != KYBER_ETH_ADDRESS) { srcToken.safeApprove(address(kyberNetworkProxy), _srcAmount); } uint destAmount = kyberNetworkProxy.trade{value: msg.value}( srcToken, _srcAmount, destToken, msg.sender, uint(-1), 0, WALLET_ID ); return destAmount; } /// @notice Buys a _destAmount of tokens at Kyber /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint srcAmount function buy(address _srcAddr, address _destAddr, uint _destAmount, bytes memory _additionalData) external override payable returns(uint) { ERC20 srcToken = ERC20(_srcAddr); ERC20 destToken = ERC20(_destAddr); uint srcAmount = 0; if (_srcAddr != KYBER_ETH_ADDRESS) { srcAmount = srcToken.balanceOf(address(this)); } else { srcAmount = msg.value; } KyberNetworkProxyInterface kyberNetworkProxy = KyberNetworkProxyInterface(KYBER_INTERFACE); if (_srcAddr != KYBER_ETH_ADDRESS) { srcToken.safeApprove(address(kyberNetworkProxy), srcAmount); } uint destAmount = kyberNetworkProxy.trade{value: msg.value}( srcToken, srcAmount, destToken, msg.sender, _destAmount, 0, WALLET_ID ); require(destAmount == _destAmount, "Wrong dest amount"); uint srcAmountAfter = 0; if (_srcAddr != KYBER_ETH_ADDRESS) { srcAmountAfter = srcToken.balanceOf(address(this)); } else { srcAmountAfter = address(this).balance; } // Send the leftover from the source token back sendLeftOver(_srcAddr); return (srcAmount - srcAmountAfter); } /// @notice Return a rate for which we can sell an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return rate Rate function getSellRate(address _srcAddr, address _destAddr, uint _srcAmount, bytes memory _additionalData) public override view returns (uint rate) { (rate, ) = KyberNetworkProxyInterface(KYBER_INTERFACE) .getExpectedRate(ERC20(_srcAddr), ERC20(_destAddr), _srcAmount); // multiply with decimal difference in src token rate = rate * (10**(18 - getDecimals(_srcAddr))); // divide with decimal difference in dest token rate = rate / (10**(18 - getDecimals(_destAddr))); } /// @notice Return a rate for which we can buy an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return rate Rate function getBuyRate(address _srcAddr, address _destAddr, uint _destAmount, bytes memory _additionalData) public override view returns (uint rate) { uint256 srcRate = getSellRate(_destAddr, _srcAddr, _destAmount, _additionalData); uint256 srcAmount = wmul(srcRate, _destAmount); rate = getSellRate(_srcAddr, _destAddr, srcAmount, _additionalData); // increase rate by 3% too account for inaccuracy between sell/buy conversion rate = rate + (rate / 30); } /// @notice Send any leftover tokens, we use to clear out srcTokens after buy /// @param _srcAddr Source token address function sendLeftOver(address _srcAddr) internal { msg.sender.transfer(address(this).balance); if (_srcAddr != KYBER_ETH_ADDRESS) { ERC20(_srcAddr).safeTransfer(msg.sender, ERC20(_srcAddr).balanceOf(address(this))); } } receive() payable external {} function getDecimals(address _token) internal view returns (uint256) { if (_token == KYBER_ETH_ADDRESS) return 18; return ERC20(_token).decimals(); } } contract OasisTradeWrapperV3 is DSMath, ExchangeInterfaceV3, AdminAuth { using SafeERC20 for ERC20; address public constant OTC_ADDRESS = 0x794e6e91555438aFc3ccF1c5076A74F42133d08D; address public constant WETH_ADDRESS = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; /// @notice Sells a _srcAmount of tokens at Oasis /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Destination amount function sell(address _srcAddr, address _destAddr, uint _srcAmount, bytes memory _additionalData) external override payable returns (uint) { address srcAddr = ethToWethAddr(_srcAddr); address destAddr = ethToWethAddr(_destAddr); ERC20(srcAddr).safeApprove(OTC_ADDRESS, _srcAmount); uint destAmount = OasisInterface(OTC_ADDRESS).sellAllAmount(srcAddr, _srcAmount, destAddr, 0); // convert weth -> eth and send back if (destAddr == WETH_ADDRESS) { TokenInterface(WETH_ADDRESS).withdraw(destAmount); msg.sender.transfer(destAmount); } else { ERC20(destAddr).safeTransfer(msg.sender, destAmount); } return destAmount; } /// @notice Buys a _destAmount of tokens at Oasis /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint srcAmount function buy(address _srcAddr, address _destAddr, uint _destAmount, bytes memory _additionalData) external override payable returns(uint) { address srcAddr = ethToWethAddr(_srcAddr); address destAddr = ethToWethAddr(_destAddr); ERC20(srcAddr).safeApprove(OTC_ADDRESS, uint(-1)); uint srcAmount = OasisInterface(OTC_ADDRESS).buyAllAmount(destAddr, _destAmount, srcAddr, uint(-1)); // convert weth -> eth and send back if (destAddr == WETH_ADDRESS) { TokenInterface(WETH_ADDRESS).withdraw(_destAmount); msg.sender.transfer(_destAmount); } else { ERC20(destAddr).safeTransfer(msg.sender, _destAmount); } // Send the leftover from the source token back sendLeftOver(srcAddr); return srcAmount; } /// @notice Return a rate for which we can sell an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Rate function getSellRate(address _srcAddr, address _destAddr, uint _srcAmount, bytes memory _additionalData) public override view returns (uint) { address srcAddr = ethToWethAddr(_srcAddr); address destAddr = ethToWethAddr(_destAddr); return wdiv(OasisInterface(OTC_ADDRESS).getBuyAmount(destAddr, srcAddr, _srcAmount), _srcAmount); } /// @notice Return a rate for which we can buy an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint Rate function getBuyRate(address _srcAddr, address _destAddr, uint _destAmount, bytes memory _additionalData) public override view returns (uint) { address srcAddr = ethToWethAddr(_srcAddr); address destAddr = ethToWethAddr(_destAddr); return wdiv(1 ether, wdiv(OasisInterface(OTC_ADDRESS).getPayAmount(srcAddr, destAddr, _destAmount), _destAmount)); } /// @notice Send any leftover tokens, we use to clear out srcTokens after buy /// @param _srcAddr Source token address function sendLeftOver(address _srcAddr) internal { msg.sender.transfer(address(this).balance); if (_srcAddr != KYBER_ETH_ADDRESS) { ERC20(_srcAddr).safeTransfer(msg.sender, ERC20(_srcAddr).balanceOf(address(this))); } } /// @notice Converts Kybers Eth address -> Weth /// @param _src Input address function ethToWethAddr(address _src) internal pure returns (address) { return _src == KYBER_ETH_ADDRESS ? WETH_ADDRESS : _src; } receive() payable external {} } contract UniswapWrapperV3 is DSMath, ExchangeInterfaceV3, AdminAuth { address public constant WETH_ADDRESS = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; UniswapRouterInterface public constant router = UniswapRouterInterface(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D); using SafeERC20 for ERC20; /// @notice Sells a _srcAmount of tokens at UniswapV2 /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Destination amount function sell(address _srcAddr, address _destAddr, uint _srcAmount, bytes memory _additionalData) external payable override returns (uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); uint[] memory amounts; address[] memory path = abi.decode(_additionalData, (address[])); ERC20(_srcAddr).safeApprove(address(router), _srcAmount); // if we are buying ether if (_destAddr == WETH_ADDRESS) { amounts = router.swapExactTokensForETH(_srcAmount, 1, path, msg.sender, block.timestamp + 1); } // if we are selling token to token else { amounts = router.swapExactTokensForTokens(_srcAmount, 1, path, msg.sender, block.timestamp + 1); } return amounts[amounts.length - 1]; } /// @notice Buys a _destAmount of tokens at UniswapV2 /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint srcAmount function buy(address _srcAddr, address _destAddr, uint _destAmount, bytes memory _additionalData) external override payable returns(uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); uint[] memory amounts; address[] memory path = abi.decode(_additionalData, (address[])); ERC20(_srcAddr).safeApprove(address(router), uint(-1)); // if we are buying ether if (_destAddr == WETH_ADDRESS) { amounts = router.swapTokensForExactETH(_destAmount, uint(-1), path, msg.sender, block.timestamp + 1); } // if we are buying token to token else { amounts = router.swapTokensForExactTokens(_destAmount, uint(-1), path, msg.sender, block.timestamp + 1); } // Send the leftover from the source token back sendLeftOver(_srcAddr); return amounts[0]; } /// @notice Return a rate for which we can sell an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Rate function getSellRate(address _srcAddr, address _destAddr, uint _srcAmount, bytes memory _additionalData) public override view returns (uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); address[] memory path = abi.decode(_additionalData, (address[])); uint[] memory amounts = router.getAmountsOut(_srcAmount, path); return wdiv(amounts[amounts.length - 1], _srcAmount); } /// @notice Return a rate for which we can buy an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint Rate function getBuyRate(address _srcAddr, address _destAddr, uint _destAmount, bytes memory _additionalData) public override view returns (uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); address[] memory path = abi.decode(_additionalData, (address[])); uint[] memory amounts = router.getAmountsIn(_destAmount, path); return wdiv(_destAmount, amounts[0]); } /// @notice Send any leftover tokens, we use to clear out srcTokens after buy /// @param _srcAddr Source token address function sendLeftOver(address _srcAddr) internal { msg.sender.transfer(address(this).balance); if (_srcAddr != KYBER_ETH_ADDRESS) { ERC20(_srcAddr).safeTransfer(msg.sender, ERC20(_srcAddr).balanceOf(address(this))); } } /// @notice Converts Kybers Eth address -> Weth /// @param _src Input address function ethToWethAddr(address _src) internal pure returns (address) { return _src == KYBER_ETH_ADDRESS ? WETH_ADDRESS : _src; } function getDecimals(address _token) internal view returns (uint256) { if (_token == KYBER_ETH_ADDRESS) return 18; return ERC20(_token).decimals(); } receive() payable external {} } contract DyDxFlashLoanTaker is DydxFlashLoanBase, ProxyPermission { address public constant WETH_ADDR = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; /// @notice Takes flash loan for _receiver /// @dev Receiver must send back WETH + 2 wei after executing transaction /// @dev Method is meant to be called from proxy and proxy will give authorization to _receiver /// @param _receiver Address of funds receiver /// @param _ethAmount ETH amount that needs to be pulled from dydx /// @param _encodedData Bytes with packed data function takeLoan(address _receiver, uint256 _ethAmount, bytes memory _encodedData) public { ISoloMargin solo = ISoloMargin(SOLO_MARGIN_ADDRESS); // Get marketId from token address uint256 marketId = _getMarketIdFromTokenAddress(WETH_ADDR); // Calculate repay amount (_amount + (2 wei)) // Approve transfer from uint256 repayAmount = _getRepaymentAmountInternal(_ethAmount); ERC20(WETH_ADDR).approve(SOLO_MARGIN_ADDRESS, repayAmount); Actions.ActionArgs[] memory operations = new Actions.ActionArgs[](3); operations[0] = _getWithdrawAction(marketId, _ethAmount, _receiver); operations[1] = _getCallAction( _encodedData, _receiver ); operations[2] = _getDepositAction(marketId, repayAmount, address(this)); Account.Info[] memory accountInfos = new Account.Info[](1); accountInfos[0] = _getAccountInfo(); givePermission(_receiver); solo.operate(accountInfos, operations); removePermission(_receiver); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "DyDxFlashLoanTaken", abi.encode(_receiver, _ethAmount, _encodedData)); } } abstract contract CTokenInterface is ERC20 { function mint(uint256 mintAmount) external virtual returns (uint256); // function mint() external virtual payable; function accrueInterest() public virtual returns (uint); function redeem(uint256 redeemTokens) external virtual returns (uint256); function redeemUnderlying(uint256 redeemAmount) external virtual returns (uint256); function borrow(uint256 borrowAmount) external virtual returns (uint256); function borrowIndex() public view virtual returns (uint); function borrowBalanceStored(address) public view virtual returns(uint); function repayBorrow(uint256 repayAmount) external virtual returns (uint256); function repayBorrow() external virtual payable; function repayBorrowBehalf(address borrower, uint256 repayAmount) external virtual returns (uint256); function repayBorrowBehalf(address borrower) external virtual payable; function liquidateBorrow(address borrower, uint256 repayAmount, address cTokenCollateral) external virtual returns (uint256); function liquidateBorrow(address borrower, address cTokenCollateral) external virtual payable; function exchangeRateCurrent() external virtual returns (uint256); function supplyRatePerBlock() external virtual returns (uint256); function borrowRatePerBlock() external virtual returns (uint256); function totalReserves() external virtual returns (uint256); function reserveFactorMantissa() external virtual returns (uint256); function borrowBalanceCurrent(address account) external virtual returns (uint256); function totalBorrowsCurrent() external virtual returns (uint256); function getCash() external virtual returns (uint256); function balanceOfUnderlying(address owner) external virtual returns (uint256); function underlying() external virtual returns (address); function getAccountSnapshot(address account) external virtual view returns (uint, uint, uint, uint); } abstract contract ISubscriptionsV2 is StaticV2 { function getOwner(uint _cdpId) external view virtual returns(address); function getSubscribedInfo(uint _cdpId) public view virtual returns(bool, uint128, uint128, uint128, uint128, address, uint coll, uint debt); function getCdpHolder(uint _cdpId) public view virtual returns (bool subscribed, CdpHolder memory); } contract MCDMonitorV2 is DSMath, AdminAuth, GasBurner, StaticV2 { uint public REPAY_GAS_TOKEN = 25; uint public BOOST_GAS_TOKEN = 25; uint public MAX_GAS_PRICE = 500000000000; // 500 gwei uint public REPAY_GAS_COST = 1800000; uint public BOOST_GAS_COST = 1800000; MCDMonitorProxyV2 public monitorProxyContract; ISubscriptionsV2 public subscriptionsContract; address public mcdSaverTakerAddress; address public constant BOT_REGISTRY_ADDRESS = 0x637726f8b08a7ABE3aE3aCaB01A80E2d8ddeF77B; Manager public manager = Manager(0x5ef30b9986345249bc32d8928B7ee64DE9435E39); Vat public vat = Vat(0x35D1b3F3D7966A1DFe207aa4514C12a259A0492B); Spotter public spotter = Spotter(0x65C79fcB50Ca1594B025960e539eD7A9a6D434A3); DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); modifier onlyApproved() { require(BotRegistry(BOT_REGISTRY_ADDRESS).botList(msg.sender), "Not auth bot"); _; } constructor(address _monitorProxy, address _subscriptions, address _mcdSaverTakerAddress) public { monitorProxyContract = MCDMonitorProxyV2(_monitorProxy); subscriptionsContract = ISubscriptionsV2(_subscriptions); mcdSaverTakerAddress = _mcdSaverTakerAddress; } /// @notice Bots call this method to repay for user when conditions are met /// @dev If the contract ownes gas token it will try and use it for gas price reduction function repayFor( SaverExchangeCore.ExchangeData memory _exchangeData, uint _cdpId, uint _nextPrice, address _joinAddr ) public payable onlyApproved burnGas(REPAY_GAS_TOKEN) { (bool isAllowed, uint ratioBefore) = canCall(Method.Repay, _cdpId, _nextPrice); require(isAllowed); uint gasCost = calcGasCost(REPAY_GAS_COST); address owner = subscriptionsContract.getOwner(_cdpId); monitorProxyContract.callExecute{value: msg.value}( owner, mcdSaverTakerAddress, abi.encodeWithSignature( "repayWithLoan((address,address,uint256,uint256,uint256,address,address,bytes,uint256),uint256,uint256,address)", _exchangeData, _cdpId, gasCost, _joinAddr)); (bool isGoodRatio, uint ratioAfter) = ratioGoodAfter(Method.Repay, _cdpId, _nextPrice); require(isGoodRatio); returnEth(); logger.Log(address(this), owner, "AutomaticMCDRepay", abi.encode(ratioBefore, ratioAfter)); } /// @notice Bots call this method to boost for user when conditions are met /// @dev If the contract ownes gas token it will try and use it for gas price reduction function boostFor( SaverExchangeCore.ExchangeData memory _exchangeData, uint _cdpId, uint _nextPrice, address _joinAddr ) public payable onlyApproved burnGas(BOOST_GAS_TOKEN) { (bool isAllowed, uint ratioBefore) = canCall(Method.Boost, _cdpId, _nextPrice); require(isAllowed); uint gasCost = calcGasCost(BOOST_GAS_COST); address owner = subscriptionsContract.getOwner(_cdpId); monitorProxyContract.callExecute{value: msg.value}( owner, mcdSaverTakerAddress, abi.encodeWithSignature( "boostWithLoan((address,address,uint256,uint256,uint256,address,address,bytes,uint256),uint256,uint256,address)", _exchangeData, _cdpId, gasCost, _joinAddr)); (bool isGoodRatio, uint ratioAfter) = ratioGoodAfter(Method.Boost, _cdpId, _nextPrice); require(isGoodRatio); returnEth(); logger.Log(address(this), owner, "AutomaticMCDBoost", abi.encode(ratioBefore, ratioAfter)); } /******************* INTERNAL METHODS ********************************/ function returnEth() internal { // return if some eth left if (address(this).balance > 0) { msg.sender.transfer(address(this).balance); } } /******************* STATIC METHODS ********************************/ /// @notice Returns an address that owns the CDP /// @param _cdpId Id of the CDP function getOwner(uint _cdpId) public view returns(address) { return manager.owns(_cdpId); } /// @notice Gets CDP info (collateral, debt) /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP function getCdpInfo(uint _cdpId, bytes32 _ilk) public view returns (uint, uint) { address urn = manager.urns(_cdpId); (uint collateral, uint debt) = vat.urns(_ilk, urn); (,uint rate,,,) = vat.ilks(_ilk); return (collateral, rmul(debt, rate)); } /// @notice Gets a price of the asset /// @param _ilk Ilk of the CDP function getPrice(bytes32 _ilk) public view returns (uint) { (, uint mat) = spotter.ilks(_ilk); (,,uint spot,,) = vat.ilks(_ilk); return rmul(rmul(spot, spotter.par()), mat); } /// @notice Gets CDP ratio /// @param _cdpId Id of the CDP /// @param _nextPrice Next price for user function getRatio(uint _cdpId, uint _nextPrice) public view returns (uint) { bytes32 ilk = manager.ilks(_cdpId); uint price = (_nextPrice == 0) ? getPrice(ilk) : _nextPrice; (uint collateral, uint debt) = getCdpInfo(_cdpId, ilk); if (debt == 0) return 0; return rdiv(wmul(collateral, price), debt) / (10 ** 18); } /// @notice Checks if Boost/Repay could be triggered for the CDP /// @dev Called by MCDMonitor to enforce the min/max check function canCall(Method _method, uint _cdpId, uint _nextPrice) public view returns(bool, uint) { bool subscribed; CdpHolder memory holder; (subscribed, holder) = subscriptionsContract.getCdpHolder(_cdpId); // check if cdp is subscribed if (!subscribed) return (false, 0); // check if using next price is allowed if (_nextPrice > 0 && !holder.nextPriceEnabled) return (false, 0); // check if boost and boost allowed if (_method == Method.Boost && !holder.boostEnabled) return (false, 0); // check if owner is still owner if (getOwner(_cdpId) != holder.owner) return (false, 0); uint currRatio = getRatio(_cdpId, _nextPrice); if (_method == Method.Repay) { return (currRatio < holder.minRatio, currRatio); } else if (_method == Method.Boost) { return (currRatio > holder.maxRatio, currRatio); } } /// @dev After the Boost/Repay check if the ratio doesn't trigger another call function ratioGoodAfter(Method _method, uint _cdpId, uint _nextPrice) public view returns(bool, uint) { CdpHolder memory holder; (, holder) = subscriptionsContract.getCdpHolder(_cdpId); uint currRatio = getRatio(_cdpId, _nextPrice); if (_method == Method.Repay) { return (currRatio < holder.maxRatio, currRatio); } else if (_method == Method.Boost) { return (currRatio > holder.minRatio, currRatio); } } /// @notice Calculates gas cost (in Eth) of tx /// @dev Gas price is limited to MAX_GAS_PRICE to prevent attack of draining user CDP /// @param _gasAmount Amount of gas used for the tx function calcGasCost(uint _gasAmount) public view returns (uint) { uint gasPrice = tx.gasprice <= MAX_GAS_PRICE ? tx.gasprice : MAX_GAS_PRICE; return mul(gasPrice, _gasAmount); } /******************* OWNER ONLY OPERATIONS ********************************/ /// @notice Allows owner to change gas cost for boost operation, but only up to 3 millions /// @param _gasCost New gas cost for boost method function changeBoostGasCost(uint _gasCost) public onlyOwner { require(_gasCost < 3000000); BOOST_GAS_COST = _gasCost; } /// @notice Allows owner to change gas cost for repay operation, but only up to 3 millions /// @param _gasCost New gas cost for repay method function changeRepayGasCost(uint _gasCost) public onlyOwner { require(_gasCost < 3000000); REPAY_GAS_COST = _gasCost; } /// @notice Allows owner to change max gas price /// @param _maxGasPrice New max gas price function changeMaxGasPrice(uint _maxGasPrice) public onlyOwner { require(_maxGasPrice < 500000000000); MAX_GAS_PRICE = _maxGasPrice; } /// @notice Allows owner to change the amount of gas token burned per function call /// @param _gasAmount Amount of gas token /// @param _isRepay Flag to know for which function we are setting the gas token amount function changeGasTokenAmount(uint _gasAmount, bool _isRepay) public onlyOwner { if (_isRepay) { REPAY_GAS_TOKEN = _gasAmount; } else { BOOST_GAS_TOKEN = _gasAmount; } } } contract MCDCloseFlashLoan is DFSExchangeCore, MCDSaverProxyHelper, FlashLoanReceiverBase, AdminAuth { ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); uint public constant SERVICE_FEE = 400; // 0.25% Fee bytes32 internal constant ETH_ILK = 0x4554482d41000000000000000000000000000000000000000000000000000000; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; address public constant DAI_JOIN_ADDRESS = 0x9759A6Ac90977b93B58547b4A71c78317f391A28; address public constant SPOTTER_ADDRESS = 0x65C79fcB50Ca1594B025960e539eD7A9a6D434A3; address public constant VAT_ADDRESS = 0x35D1b3F3D7966A1DFe207aa4514C12a259A0492B; Manager public constant manager = Manager(0x5ef30b9986345249bc32d8928B7ee64DE9435E39); DaiJoin public constant daiJoin = DaiJoin(DAI_JOIN_ADDRESS); Spotter public constant spotter = Spotter(SPOTTER_ADDRESS); Vat public constant vat = Vat(VAT_ADDRESS); struct CloseData { uint cdpId; uint collAmount; uint daiAmount; uint minAccepted; address joinAddr; address proxy; uint flFee; bool toDai; address reserve; uint amount; } constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public {} function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { (address proxy, bytes memory packedData) = abi.decode(_params, (address,bytes)); (MCDCloseTaker.CloseData memory closeDataSent, ExchangeData memory exchangeData) = abi.decode(packedData, (MCDCloseTaker.CloseData,ExchangeData)); CloseData memory closeData = CloseData({ cdpId: closeDataSent.cdpId, collAmount: closeDataSent.collAmount, daiAmount: closeDataSent.daiAmount, minAccepted: closeDataSent.minAccepted, joinAddr: closeDataSent.joinAddr, proxy: proxy, flFee: _fee, toDai: closeDataSent.toDai, reserve: _reserve, amount: _amount }); address user = DSProxy(payable(closeData.proxy)).owner(); exchangeData.dfsFeeDivider = SERVICE_FEE; exchangeData.user = user; closeCDP(closeData, exchangeData, user); } function closeCDP( CloseData memory _closeData, ExchangeData memory _exchangeData, address _user ) internal { paybackDebt(_closeData.cdpId, manager.ilks(_closeData.cdpId), _closeData.daiAmount); // payback whole debt uint drawnAmount = drawMaxCollateral(_closeData.cdpId, _closeData.joinAddr, _closeData.collAmount); // draw whole collateral uint daiSwaped = 0; if (_closeData.toDai) { _exchangeData.srcAmount = drawnAmount; (, daiSwaped) = _sell(_exchangeData); } else { _exchangeData.destAmount = _closeData.daiAmount; (, daiSwaped) = _buy(_exchangeData); } address tokenAddr = getVaultCollAddr(_closeData.joinAddr); if (_closeData.toDai) { tokenAddr = DAI_ADDRESS; } require(getBalance(tokenAddr) >= _closeData.minAccepted, "Below min. number of eth specified"); transferFundsBackToPoolInternal(_closeData.reserve, _closeData.amount.add(_closeData.flFee)); sendLeftover(tokenAddr, DAI_ADDRESS, payable(_user)); } function drawMaxCollateral(uint _cdpId, address _joinAddr, uint _amount) internal returns (uint) { manager.frob(_cdpId, -toPositiveInt(_amount), 0); manager.flux(_cdpId, address(this), _amount); uint joinAmount = _amount; if (Join(_joinAddr).dec() != 18) { joinAmount = _amount / (10 ** (18 - Join(_joinAddr).dec())); } Join(_joinAddr).exit(address(this), joinAmount); if (isEthJoinAddr(_joinAddr)) { Join(_joinAddr).gem().withdraw(joinAmount); // Weth -> Eth } return joinAmount; } function paybackDebt(uint _cdpId, bytes32 _ilk, uint _daiAmount) internal { address urn = manager.urns(_cdpId); daiJoin.dai().approve(DAI_JOIN_ADDRESS, _daiAmount); daiJoin.join(urn, _daiAmount); manager.frob(_cdpId, 0, normalizePaybackAmount(VAT_ADDRESS, urn, _ilk)); } function getVaultCollAddr(address _joinAddr) internal view returns (address) { address tokenAddr = address(Join(_joinAddr).gem()); if (tokenAddr == WETH_ADDRESS) { return KYBER_ETH_ADDRESS; } return tokenAddr; } function getPrice(bytes32 _ilk) public view returns (uint256) { (, uint256 mat) = spotter.ilks(_ilk); (, , uint256 spot, , ) = vat.ilks(_ilk); return rmul(rmul(spot, spotter.par()), mat); } receive() external override(FlashLoanReceiverBase, DFSExchangeCore) payable {} } contract MCDCloseTaker is MCDSaverProxyHelper { address public constant SUBSCRIPTION_ADDRESS_NEW = 0xC45d4f6B6bf41b6EdAA58B01c4298B8d9078269a; address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); // solhint-disable-next-line const-name-snakecase Manager public constant manager = Manager(0x5ef30b9986345249bc32d8928B7ee64DE9435E39); address public constant SPOTTER_ADDRESS = 0x65C79fcB50Ca1594B025960e539eD7A9a6D434A3; address public constant VAT_ADDRESS = 0x35D1b3F3D7966A1DFe207aa4514C12a259A0492B; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; // solhint-disable-next-line const-name-snakecase DefisaverLogger public constant logger = DefisaverLogger(DEFISAVER_LOGGER); struct CloseData { uint cdpId; address joinAddr; uint collAmount; uint daiAmount; uint minAccepted; bool wholeDebt; bool toDai; } Vat public constant vat = Vat(VAT_ADDRESS); Spotter public constant spotter = Spotter(SPOTTER_ADDRESS); function closeWithLoan( DFSExchangeData.ExchangeData memory _exchangeData, CloseData memory _closeData, address payable mcdCloseFlashLoan ) public payable { mcdCloseFlashLoan.transfer(msg.value); // 0x fee if (_closeData.wholeDebt) { _closeData.daiAmount = getAllDebt( VAT_ADDRESS, manager.urns(_closeData.cdpId), manager.urns(_closeData.cdpId), manager.ilks(_closeData.cdpId) ); (_closeData.collAmount, ) = getCdpInfo(manager, _closeData.cdpId, manager.ilks(_closeData.cdpId)); } manager.cdpAllow(_closeData.cdpId, mcdCloseFlashLoan, 1); bytes memory packedData = _packData(_closeData, _exchangeData); bytes memory paramsData = abi.encode(address(this), packedData); lendingPool.flashLoan(mcdCloseFlashLoan, DAI_ADDRESS, _closeData.daiAmount, paramsData); manager.cdpAllow(_closeData.cdpId, mcdCloseFlashLoan, 0); // If sub. to automatic protection unsubscribe unsubscribe(SUBSCRIPTION_ADDRESS_NEW, _closeData.cdpId); logger.Log(address(this), msg.sender, "MCDClose", abi.encode(_closeData.cdpId, _closeData.collAmount, _closeData.daiAmount, _closeData.toDai)); } /// @notice Gets the maximum amount of debt available to generate /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP function getMaxDebt(uint256 _cdpId, bytes32 _ilk) public view returns (uint256) { uint256 price = getPrice(_ilk); (, uint256 mat) = spotter.ilks(_ilk); (uint256 collateral, uint256 debt) = getCdpInfo(manager, _cdpId, _ilk); return sub(wdiv(wmul(collateral, price), mat), debt); } /// @notice Gets a price of the asset /// @param _ilk Ilk of the CDP function getPrice(bytes32 _ilk) public view returns (uint256) { (, uint256 mat) = spotter.ilks(_ilk); (, , uint256 spot, , ) = vat.ilks(_ilk); return rmul(rmul(spot, spotter.par()), mat); } function unsubscribe(address _subContract, uint _cdpId) internal { (, bool isSubscribed) = IMCDSubscriptions(_subContract).subscribersPos(_cdpId); if (isSubscribed) { IMCDSubscriptions(_subContract).unsubscribe(_cdpId); } } function _packData( CloseData memory _closeData, DFSExchangeData.ExchangeData memory _exchangeData ) internal pure returns (bytes memory) { return abi.encode(_closeData, _exchangeData); } } contract MCDCreateFlashLoan is DFSExchangeCore, AdminAuth, FlashLoanReceiverBase { address public constant CREATE_PROXY_ACTIONS = 0x6d0984E80a86f26c0dd564ca0CF74a8E9Da03305; uint public constant SERVICE_FEE = 400; // 0.25% Fee address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); address public constant DAI_JOIN_ADDRESS = 0x9759A6Ac90977b93B58547b4A71c78317f391A28; address public constant JUG_ADDRESS = 0x19c0976f590D67707E62397C87829d896Dc0f1F1; address public constant MANAGER_ADDRESS = 0x5ef30b9986345249bc32d8928B7ee64DE9435E39; constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public {} function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { //check the contract has the specified balance require(_amount <= getBalanceInternal(address(this), _reserve), "Invalid balance for the contract"); (address proxy, bytes memory packedData) = abi.decode(_params, (address,bytes)); (MCDCreateTaker.CreateData memory createData, ExchangeData memory exchangeData) = abi.decode(packedData, (MCDCreateTaker.CreateData,ExchangeData)); exchangeData.dfsFeeDivider = SERVICE_FEE; exchangeData.user = DSProxy(payable(proxy)).owner(); openAndLeverage(createData.collAmount, createData.daiAmount + _fee, createData.joinAddr, proxy, exchangeData); transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } } function openAndLeverage( uint _collAmount, uint _daiAmountAndFee, address _joinAddr, address _proxy, ExchangeData memory _exchangeData ) public { (, uint256 collSwaped) = _sell(_exchangeData); bytes32 ilk = Join(_joinAddr).ilk(); if (isEthJoinAddr(_joinAddr)) { MCDCreateProxyActions(CREATE_PROXY_ACTIONS).openLockETHAndDraw{value: address(this).balance}( MANAGER_ADDRESS, JUG_ADDRESS, _joinAddr, DAI_JOIN_ADDRESS, ilk, _daiAmountAndFee, _proxy ); } else { ERC20(address(Join(_joinAddr).gem())).safeApprove(CREATE_PROXY_ACTIONS, uint256(-1)); MCDCreateProxyActions(CREATE_PROXY_ACTIONS).openLockGemAndDraw( MANAGER_ADDRESS, JUG_ADDRESS, _joinAddr, DAI_JOIN_ADDRESS, ilk, (_collAmount + collSwaped), _daiAmountAndFee, true, _proxy ); } } /// @notice Checks if the join address is one of the Ether coll. types /// @param _joinAddr Join address to check function isEthJoinAddr(address _joinAddr) internal view returns (bool) { // if it's dai_join_addr don't check gem() it will fail if (_joinAddr == 0x9759A6Ac90977b93B58547b4A71c78317f391A28) return false; // if coll is weth it's and eth type coll if (address(Join(_joinAddr).gem()) == 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2) { return true; } return false; } receive() external override(FlashLoanReceiverBase, DFSExchangeCore) payable {} } contract MCDSaverProxy is DFSExchangeCore, MCDSaverProxyHelper { uint public constant MANUAL_SERVICE_FEE = 400; // 0.25% Fee uint public constant AUTOMATIC_SERVICE_FEE = 333; // 0.3% Fee bytes32 public constant ETH_ILK = 0x4554482d41000000000000000000000000000000000000000000000000000000; address public constant MANAGER_ADDRESS = 0x5ef30b9986345249bc32d8928B7ee64DE9435E39; address public constant VAT_ADDRESS = 0x35D1b3F3D7966A1DFe207aa4514C12a259A0492B; address public constant SPOTTER_ADDRESS = 0x65C79fcB50Ca1594B025960e539eD7A9a6D434A3; address public constant DAI_JOIN_ADDRESS = 0x9759A6Ac90977b93B58547b4A71c78317f391A28; address public constant JUG_ADDRESS = 0x19c0976f590D67707E62397C87829d896Dc0f1F1; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; address public constant BOT_REGISTRY_ADDRESS = 0x637726f8b08a7ABE3aE3aCaB01A80E2d8ddeF77B; Manager public constant manager = Manager(MANAGER_ADDRESS); Vat public constant vat = Vat(VAT_ADDRESS); DaiJoin public constant daiJoin = DaiJoin(DAI_JOIN_ADDRESS); Spotter public constant spotter = Spotter(SPOTTER_ADDRESS); DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); /// @notice Repay - draws collateral, converts to Dai and repays the debt /// @dev Must be called by the DSProxy contract that owns the CDP function repay( ExchangeData memory _exchangeData, uint _cdpId, uint _gasCost, address _joinAddr ) public payable { address user = getOwner(manager, _cdpId); bytes32 ilk = manager.ilks(_cdpId); drawCollateral(_cdpId, _joinAddr, _exchangeData.srcAmount); _exchangeData.user = user; _exchangeData.dfsFeeDivider = isAutomation() ? AUTOMATIC_SERVICE_FEE : MANUAL_SERVICE_FEE; (, uint daiAmount) = _sell(_exchangeData); daiAmount -= takeFee(_gasCost, daiAmount); paybackDebt(_cdpId, ilk, daiAmount, user); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } logger.Log(address(this), msg.sender, "MCDRepay", abi.encode(_cdpId, user, _exchangeData.srcAmount, daiAmount)); } /// @notice Boost - draws Dai, converts to collateral and adds to CDP /// @dev Must be called by the DSProxy contract that owns the CDP function boost( ExchangeData memory _exchangeData, uint _cdpId, uint _gasCost, address _joinAddr ) public payable { address user = getOwner(manager, _cdpId); bytes32 ilk = manager.ilks(_cdpId); uint daiDrawn = drawDai(_cdpId, ilk, _exchangeData.srcAmount); _exchangeData.user = user; _exchangeData.dfsFeeDivider = isAutomation() ? AUTOMATIC_SERVICE_FEE : MANUAL_SERVICE_FEE; _exchangeData.srcAmount = daiDrawn - takeFee(_gasCost, daiDrawn); (, uint swapedColl) = _sell(_exchangeData); addCollateral(_cdpId, _joinAddr, swapedColl); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } logger.Log(address(this), msg.sender, "MCDBoost", abi.encode(_cdpId, user, _exchangeData.srcAmount, swapedColl)); } /// @notice Draws Dai from the CDP /// @dev If _daiAmount is bigger than max available we'll draw max /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP /// @param _daiAmount Amount of Dai to draw function drawDai(uint _cdpId, bytes32 _ilk, uint _daiAmount) internal returns (uint) { uint rate = Jug(JUG_ADDRESS).drip(_ilk); uint daiVatBalance = vat.dai(manager.urns(_cdpId)); uint maxAmount = getMaxDebt(_cdpId, _ilk); if (_daiAmount >= maxAmount) { _daiAmount = sub(maxAmount, 1); } manager.frob(_cdpId, int(0), normalizeDrawAmount(_daiAmount, rate, daiVatBalance)); manager.move(_cdpId, address(this), toRad(_daiAmount)); if (vat.can(address(this), address(DAI_JOIN_ADDRESS)) == 0) { vat.hope(DAI_JOIN_ADDRESS); } DaiJoin(DAI_JOIN_ADDRESS).exit(address(this), _daiAmount); return _daiAmount; } /// @notice Adds collateral to the CDP /// @param _cdpId Id of the CDP /// @param _joinAddr Address of the join contract for the CDP collateral /// @param _amount Amount of collateral to add function addCollateral(uint _cdpId, address _joinAddr, uint _amount) internal { int convertAmount = 0; if (isEthJoinAddr(_joinAddr)) { Join(_joinAddr).gem().deposit{value: _amount}(); convertAmount = toPositiveInt(_amount); } else { convertAmount = toPositiveInt(convertTo18(_joinAddr, _amount)); } ERC20(address(Join(_joinAddr).gem())).safeApprove(_joinAddr, _amount); Join(_joinAddr).join(address(this), _amount); vat.frob( manager.ilks(_cdpId), manager.urns(_cdpId), address(this), address(this), convertAmount, 0 ); } /// @notice Draws collateral and returns it to DSProxy /// @dev If _amount is bigger than max available we'll draw max /// @param _cdpId Id of the CDP /// @param _joinAddr Address of the join contract for the CDP collateral /// @param _amount Amount of collateral to draw function drawCollateral(uint _cdpId, address _joinAddr, uint _amount) internal returns (uint) { uint frobAmount = _amount; if (Join(_joinAddr).dec() != 18) { frobAmount = _amount * (10 ** (18 - Join(_joinAddr).dec())); } manager.frob(_cdpId, -toPositiveInt(frobAmount), 0); manager.flux(_cdpId, address(this), frobAmount); Join(_joinAddr).exit(address(this), _amount); if (isEthJoinAddr(_joinAddr)) { Join(_joinAddr).gem().withdraw(_amount); // Weth -> Eth } return _amount; } /// @notice Paybacks Dai debt /// @dev If the _daiAmount is bigger than the whole debt, returns extra Dai /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP /// @param _daiAmount Amount of Dai to payback /// @param _owner Address that owns the DSProxy that owns the CDP function paybackDebt(uint _cdpId, bytes32 _ilk, uint _daiAmount, address _owner) internal { address urn = manager.urns(_cdpId); uint wholeDebt = getAllDebt(VAT_ADDRESS, urn, urn, _ilk); if (_daiAmount > wholeDebt) { ERC20(DAI_ADDRESS).transfer(_owner, sub(_daiAmount, wholeDebt)); _daiAmount = wholeDebt; } if (ERC20(DAI_ADDRESS).allowance(address(this), DAI_JOIN_ADDRESS) == 0) { ERC20(DAI_ADDRESS).approve(DAI_JOIN_ADDRESS, uint(-1)); } daiJoin.join(urn, _daiAmount); manager.frob(_cdpId, 0, normalizePaybackAmount(VAT_ADDRESS, urn, _ilk)); } /// @notice Gets the maximum amount of collateral available to draw /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP /// @param _joinAddr Joind address of collateral /// @dev Substracts 10 wei to aviod rounding error later on function getMaxCollateral(uint _cdpId, bytes32 _ilk, address _joinAddr) public view returns (uint) { uint price = getPrice(_ilk); (uint collateral, uint debt) = getCdpInfo(manager, _cdpId, _ilk); (, uint mat) = Spotter(SPOTTER_ADDRESS).ilks(_ilk); uint maxCollateral = sub(collateral, (div(mul(mat, debt), price))); uint normalizeMaxCollateral = maxCollateral / (10 ** (18 - Join(_joinAddr).dec())); // take one percent due to precision issues return normalizeMaxCollateral * 99 / 100; } /// @notice Gets the maximum amount of debt available to generate /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP /// @dev Substracts 10 wei to aviod rounding error later on function getMaxDebt(uint _cdpId, bytes32 _ilk) public virtual view returns (uint) { uint price = getPrice(_ilk); (, uint mat) = spotter.ilks(_ilk); (uint collateral, uint debt) = getCdpInfo(manager, _cdpId, _ilk); return sub(sub(div(mul(collateral, price), mat), debt), 10); } /// @notice Gets a price of the asset /// @param _ilk Ilk of the CDP function getPrice(bytes32 _ilk) public view returns (uint) { (, uint mat) = spotter.ilks(_ilk); (,,uint spot,,) = vat.ilks(_ilk); return rmul(rmul(spot, spotter.par()), mat); } /// @notice Gets CDP ratio /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP function getRatio(uint _cdpId, bytes32 _ilk) public view returns (uint) { uint price = getPrice( _ilk); (uint collateral, uint debt) = getCdpInfo(manager, _cdpId, _ilk); if (debt == 0) return 0; return rdiv(wmul(collateral, price), debt); } /// @notice Gets CDP info (collateral, debt, price, ilk) /// @param _cdpId Id of the CDP function getCdpDetailedInfo(uint _cdpId) public view returns (uint collateral, uint debt, uint price, bytes32 ilk) { address urn = manager.urns(_cdpId); ilk = manager.ilks(_cdpId); (collateral, debt) = vat.urns(ilk, urn); (,uint rate,,,) = vat.ilks(ilk); debt = rmul(debt, rate); price = getPrice(ilk); } function isAutomation() internal view returns(bool) { return BotRegistry(BOT_REGISTRY_ADDRESS).botList(tx.origin); } function takeFee(uint256 _gasCost, uint _amount) internal returns(uint) { if (_gasCost > 0) { uint ethDaiPrice = getPrice(ETH_ILK); uint feeAmount = rmul(_gasCost, ethDaiPrice); uint balance = ERC20(DAI_ADDRESS).balanceOf(address(this)); if (feeAmount > _amount / 10) { feeAmount = _amount / 10; } ERC20(DAI_ADDRESS).transfer(WALLET_ID, feeAmount); return feeAmount; } return 0; } } contract MCDSaverTaker is MCDSaverProxy, GasBurner { address payable public constant MCD_SAVER_FLASH_LOAN = 0xD0eB57ff3eA4Def2b74dc29681fd529D1611880f; address public constant AAVE_POOL_CORE = 0x3dfd23A6c5E8BbcFc9581d2E864a68feb6a076d3; ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); function boostWithLoan( ExchangeData memory _exchangeData, uint _cdpId, uint _gasCost, address _joinAddr ) public payable burnGas(25) { uint256 maxDebt = getMaxDebt(_cdpId, manager.ilks(_cdpId)); uint maxLiq = getAvailableLiquidity(DAI_JOIN_ADDRESS); if (maxDebt >= _exchangeData.srcAmount || maxLiq == 0) { if (_exchangeData.srcAmount > maxDebt) { _exchangeData.srcAmount = maxDebt; } boost(_exchangeData, _cdpId, _gasCost, _joinAddr); return; } uint256 loanAmount = sub(_exchangeData.srcAmount, maxDebt); loanAmount = loanAmount > maxLiq ? maxLiq : loanAmount; MCD_SAVER_FLASH_LOAN.transfer(msg.value); // 0x fee manager.cdpAllow(_cdpId, MCD_SAVER_FLASH_LOAN, 1); bytes memory paramsData = abi.encode(packExchangeData(_exchangeData), _cdpId, _gasCost, _joinAddr, false); lendingPool.flashLoan(MCD_SAVER_FLASH_LOAN, DAI_ADDRESS, loanAmount, paramsData); manager.cdpAllow(_cdpId, MCD_SAVER_FLASH_LOAN, 0); } function repayWithLoan( ExchangeData memory _exchangeData, uint _cdpId, uint _gasCost, address _joinAddr ) public payable burnGas(25) { uint256 maxColl = getMaxCollateral(_cdpId, manager.ilks(_cdpId), _joinAddr); uint maxLiq = getAvailableLiquidity(_joinAddr); if (maxColl >= _exchangeData.srcAmount || maxLiq == 0) { if (_exchangeData.srcAmount > maxColl) { _exchangeData.srcAmount = maxColl; } repay(_exchangeData, _cdpId, _gasCost, _joinAddr); return; } uint256 loanAmount = sub(_exchangeData.srcAmount, maxColl); loanAmount = loanAmount > maxLiq ? maxLiq : loanAmount; MCD_SAVER_FLASH_LOAN.transfer(msg.value); // 0x fee manager.cdpAllow(_cdpId, MCD_SAVER_FLASH_LOAN, 1); bytes memory paramsData = abi.encode(packExchangeData(_exchangeData), _cdpId, _gasCost, _joinAddr, true); lendingPool.flashLoan(MCD_SAVER_FLASH_LOAN, getAaveCollAddr(_joinAddr), loanAmount, paramsData); manager.cdpAllow(_cdpId, MCD_SAVER_FLASH_LOAN, 0); } /// @notice Gets the maximum amount of debt available to generate /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP function getMaxDebt(uint256 _cdpId, bytes32 _ilk) public override view returns (uint256) { uint256 price = getPrice(_ilk); (, uint256 mat) = spotter.ilks(_ilk); (uint256 collateral, uint256 debt) = getCdpInfo(manager, _cdpId, _ilk); return sub(wdiv(wmul(collateral, price), mat), debt); } function getAaveCollAddr(address _joinAddr) internal view returns (address) { if (isEthJoinAddr(_joinAddr) || _joinAddr == 0x775787933e92b709f2a3C70aa87999696e74A9F8) { return KYBER_ETH_ADDRESS; } else if (_joinAddr == DAI_JOIN_ADDRESS) { return DAI_ADDRESS; } else { return getCollateralAddr(_joinAddr); } } function getAvailableLiquidity(address _joinAddr) internal view returns (uint liquidity) { address tokenAddr = getAaveCollAddr(_joinAddr); if (tokenAddr == KYBER_ETH_ADDRESS) { liquidity = AAVE_POOL_CORE.balance; } else { liquidity = ERC20(tokenAddr).balanceOf(AAVE_POOL_CORE); } } } contract SavingsProxy is DSRSavingsProtocol, CompoundSavingsProtocol { address public constant ADAI_ADDRESS = 0xfC1E690f61EFd961294b3e1Ce3313fBD8aa4f85d; address public constant SAVINGS_DYDX_ADDRESS = 0x03b1565e070df392e48e7a8e01798C4B00E534A5; address public constant SAVINGS_AAVE_ADDRESS = 0x535B9035E9bA8D7efe0FeAEac885fb65b303E37C; address public constant NEW_IDAI_ADDRESS = 0x493C57C4763932315A328269E1ADaD09653B9081; address public constant COMP_ADDRESS = 0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B; address public constant SAVINGS_LOGGER_ADDRESS = 0x89b3635BD2bAD145C6f92E82C9e83f06D5654984; address public constant SOLO_MARGIN_ADDRESS = 0x1E0447b19BB6EcFdAe1e4AE1694b0C3659614e4e; enum SavingsProtocol {Compound, Dydx, Fulcrum, Dsr, Aave} function deposit(SavingsProtocol _protocol, uint256 _amount) public { if (_protocol == SavingsProtocol.Dsr) { dsrDeposit(_amount, true); } else if (_protocol == SavingsProtocol.Compound) { compDeposit(msg.sender, _amount); } else { _deposit(_protocol, _amount, true); } SavingsLogger(SAVINGS_LOGGER_ADDRESS).logDeposit(msg.sender, uint8(_protocol), _amount); } function withdraw(SavingsProtocol _protocol, uint256 _amount) public { if (_protocol == SavingsProtocol.Dsr) { dsrWithdraw(_amount, true); } else if (_protocol == SavingsProtocol.Compound) { compWithdraw(msg.sender, _amount); } else { _withdraw(_protocol, _amount, true); } SavingsLogger(SAVINGS_LOGGER_ADDRESS).logWithdraw(msg.sender, uint8(_protocol), _amount); } function swap(SavingsProtocol _from, SavingsProtocol _to, uint256 _amount) public { if (_from == SavingsProtocol.Dsr) { dsrWithdraw(_amount, false); } else if (_from == SavingsProtocol.Compound) { compWithdraw(msg.sender, _amount); } else { _withdraw(_from, _amount, false); } // possible to withdraw 1-2 wei less than actual amount due to division precision // so we deposit all amount on DSProxy uint256 amountToDeposit = ERC20(DAI_ADDRESS).balanceOf(address(this)); if (_to == SavingsProtocol.Dsr) { dsrDeposit(amountToDeposit, false); } else if (_from == SavingsProtocol.Compound) { compDeposit(msg.sender, _amount); } else { _deposit(_to, amountToDeposit, false); } SavingsLogger(SAVINGS_LOGGER_ADDRESS).logSwap( msg.sender, uint8(_from), uint8(_to), _amount ); } function withdrawDai() public { ERC20(DAI_ADDRESS).transfer(msg.sender, ERC20(DAI_ADDRESS).balanceOf(address(this))); } function claimComp() public { ComptrollerInterface(COMP_ADDRESS).claimComp(address(this)); } function getAddress(SavingsProtocol _protocol) public pure returns (address) { if (_protocol == SavingsProtocol.Dydx) { return SAVINGS_DYDX_ADDRESS; } if (_protocol == SavingsProtocol.Aave) { return SAVINGS_AAVE_ADDRESS; } } function _deposit(SavingsProtocol _protocol, uint256 _amount, bool _fromUser) internal { if (_fromUser) { ERC20(DAI_ADDRESS).transferFrom(msg.sender, address(this), _amount); } approveDeposit(_protocol); ProtocolInterface(getAddress(_protocol)).deposit(address(this), _amount); endAction(_protocol); } function _withdraw(SavingsProtocol _protocol, uint256 _amount, bool _toUser) public { approveWithdraw(_protocol); ProtocolInterface(getAddress(_protocol)).withdraw(address(this), _amount); endAction(_protocol); if (_toUser) { withdrawDai(); } } function endAction(SavingsProtocol _protocol) internal { if (_protocol == SavingsProtocol.Dydx) { setDydxOperator(false); } } function approveDeposit(SavingsProtocol _protocol) internal { if (_protocol == SavingsProtocol.Compound || _protocol == SavingsProtocol.Fulcrum || _protocol == SavingsProtocol.Aave) { ERC20(DAI_ADDRESS).approve(getAddress(_protocol), uint256(-1)); } if (_protocol == SavingsProtocol.Dydx) { ERC20(DAI_ADDRESS).approve(SOLO_MARGIN_ADDRESS, uint256(-1)); setDydxOperator(true); } } function approveWithdraw(SavingsProtocol _protocol) internal { if (_protocol == SavingsProtocol.Compound) { ERC20(NEW_CDAI_ADDRESS).approve(getAddress(_protocol), uint256(-1)); } if (_protocol == SavingsProtocol.Dydx) { setDydxOperator(true); } if (_protocol == SavingsProtocol.Fulcrum) { ERC20(NEW_IDAI_ADDRESS).approve(getAddress(_protocol), uint256(-1)); } if (_protocol == SavingsProtocol.Aave) { ERC20(ADAI_ADDRESS).approve(getAddress(_protocol), uint256(-1)); } } function setDydxOperator(bool _trusted) internal { ISoloMargin.OperatorArg[] memory operatorArgs = new ISoloMargin.OperatorArg[](1); operatorArgs[0] = ISoloMargin.OperatorArg({ operator: getAddress(SavingsProtocol.Dydx), trusted: _trusted }); ISoloMargin(SOLO_MARGIN_ADDRESS).setOperators(operatorArgs); } } contract LoanShifterReceiver is SaverExchangeCore, FlashLoanReceiverBase, AdminAuth { address payable public constant WALLET_ADDR = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; address public constant DISCOUNT_ADDR = 0x1b14E8D511c9A4395425314f849bD737BAF8208F; ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; ShifterRegistry public constant shifterRegistry = ShifterRegistry(0x597C52281b31B9d949a9D8fEbA08F7A2530a965e); struct ParamData { bytes proxyData1; bytes proxyData2; address proxy; address debtAddr; uint8 protocol1; uint8 protocol2; uint8 swapType; } constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public {} function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { // Format the call data for DSProxy (ParamData memory paramData, ExchangeData memory exchangeData) = packFunctionCall(_amount, _fee, _params); address protocolAddr1 = shifterRegistry.getAddr(getNameByProtocol(paramData.protocol1)); address protocolAddr2 = shifterRegistry.getAddr(getNameByProtocol(paramData.protocol2)); // Send Flash loan amount to DSProxy sendToProxy(payable(paramData.proxy), _reserve, _amount); // Execute the Close/Change debt operation DSProxyInterface(paramData.proxy).execute(protocolAddr1, paramData.proxyData1); if (paramData.swapType == 1) { // COLL_SWAP exchangeData.srcAmount -= getFee(getBalance(exchangeData.srcAddr), exchangeData.srcAddr, paramData.proxy); (, uint amount) = _sell(exchangeData); sendToProxy(payable(paramData.proxy), exchangeData.destAddr, amount); } else if (paramData.swapType == 2) { // DEBT_SWAP exchangeData.srcAmount -= getFee(exchangeData.srcAmount, exchangeData.srcAddr, paramData.proxy); exchangeData.destAmount = (_amount + _fee); _buy(exchangeData); // Send extra to DSProxy sendToProxy(payable(paramData.proxy), exchangeData.srcAddr, ERC20(exchangeData.srcAddr).balanceOf(address(this))); } else { // NO_SWAP just send tokens to proxy sendToProxy(payable(paramData.proxy), exchangeData.srcAddr, getBalance(exchangeData.srcAddr)); } // Execute the Open operation DSProxyInterface(paramData.proxy).execute(protocolAddr2, paramData.proxyData2); // Repay FL transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } } function packFunctionCall(uint _amount, uint _fee, bytes memory _params) internal pure returns (ParamData memory paramData, ExchangeData memory exchangeData) { ( uint[8] memory numData, // collAmount, debtAmount, id1, id2, srcAmount, destAmount, minPrice, price0x address[8] memory addrData, // addrLoan1, addrLoan2, debtAddr1, debtAddr2, srcAddr, destAddr, exchangeAddr, wrapper uint8[3] memory enumData, // fromProtocol, toProtocol, swapType bytes memory callData, address proxy ) = abi.decode(_params, (uint256[8],address[8],uint8[3],bytes,address)); bytes memory proxyData1; bytes memory proxyData2; uint openDebtAmount = (_amount + _fee); if (enumData[0] == 0) { // MAKER FROM proxyData1 = abi.encodeWithSignature("close(uint256,address,uint256,uint256)", numData[2], addrData[0], _amount, numData[0]); } else if(enumData[0] == 1) { // COMPOUND FROM if (enumData[2] == 2) { // DEBT_SWAP proxyData1 = abi.encodeWithSignature("changeDebt(address,address,uint256,uint256)", addrData[2], addrData[3], _amount, numData[4]); } else { proxyData1 = abi.encodeWithSignature("close(address,address,uint256,uint256)", addrData[0], addrData[2], numData[0], numData[1]); } } if (enumData[1] == 0) { // MAKER TO proxyData2 = abi.encodeWithSignature("open(uint256,address,uint256)", numData[3], addrData[1], openDebtAmount); } else if(enumData[1] == 1) { // COMPOUND TO if (enumData[2] == 2) { // DEBT_SWAP proxyData2 = abi.encodeWithSignature("repayAll(address)", addrData[3]); } else { proxyData2 = abi.encodeWithSignature("open(address,address,uint256)", addrData[1], addrData[3], openDebtAmount); } } paramData = ParamData({ proxyData1: proxyData1, proxyData2: proxyData2, proxy: proxy, debtAddr: addrData[2], protocol1: enumData[0], protocol2: enumData[1], swapType: enumData[2] }); exchangeData = SaverExchangeCore.ExchangeData({ srcAddr: addrData[4], destAddr: addrData[5], srcAmount: numData[4], destAmount: numData[5], minPrice: numData[6], wrapper: addrData[7], exchangeAddr: addrData[6], callData: callData, price0x: numData[7] }); } function sendToProxy(address payable _proxy, address _reserve, uint _amount) internal { if (_reserve != ETH_ADDRESS) { ERC20(_reserve).safeTransfer(_proxy, _amount); } _proxy.transfer(address(this).balance); } function getNameByProtocol(uint8 _proto) internal pure returns (string memory) { if (_proto == 0) { return "MCD_SHIFTER"; } else if (_proto == 1) { return "COMP_SHIFTER"; } } function getFee(uint _amount, address _tokenAddr, address _proxy) internal returns (uint feeAmount) { uint fee = 400; DSProxyInterface proxy = DSProxyInterface(payable(_proxy)); address user = proxy.owner(); if (Discount(DISCOUNT_ADDR).isCustomFeeSet(user)) { fee = Discount(DISCOUNT_ADDR).getCustomServiceFee(user); } feeAmount = (fee == 0) ? 0 : (_amount / fee); // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } if (_tokenAddr == ETH_ADDRESS) { WALLET_ADDR.transfer(feeAmount); } else { ERC20(_tokenAddr).safeTransfer(WALLET_ADDR, feeAmount); } } receive() external override(FlashLoanReceiverBase, SaverExchangeCore) payable {} } contract LoanShifterTaker is AdminAuth, ProxyPermission, GasBurner { ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; address public constant MCD_SUB_ADDRESS = 0xC45d4f6B6bf41b6EdAA58B01c4298B8d9078269a; address public constant COMPOUND_SUB_ADDRESS = 0x52015EFFD577E08f498a0CCc11905925D58D6207; address public constant MANAGER_ADDRESS = 0x5ef30b9986345249bc32d8928B7ee64DE9435E39; address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; Manager public constant manager = Manager(MANAGER_ADDRESS); ShifterRegistry public constant shifterRegistry = ShifterRegistry(0x597C52281b31B9d949a9D8fEbA08F7A2530a965e); enum Protocols { MCD, COMPOUND } enum SwapType { NO_SWAP, COLL_SWAP, DEBT_SWAP } enum Unsub { NO_UNSUB, FIRST_UNSUB, SECOND_UNSUB, BOTH_UNSUB } struct LoanShiftData { Protocols fromProtocol; Protocols toProtocol; SwapType swapType; Unsub unsub; bool wholeDebt; uint collAmount; uint debtAmount; address debtAddr1; address debtAddr2; address addrLoan1; address addrLoan2; uint id1; uint id2; } /// @notice Main entry point, it will move or transform a loan /// @dev Called through DSProxy function moveLoan( SaverExchangeCore.ExchangeData memory _exchangeData, LoanShiftData memory _loanShift ) public payable burnGas(20) { if (_isSameTypeVaults(_loanShift)) { _forkVault(_loanShift); logEvent(_exchangeData, _loanShift); return; } _callCloseAndOpen(_exchangeData, _loanShift); } //////////////////////// INTERNAL FUNCTIONS ////////////////////////// function _callCloseAndOpen( SaverExchangeCore.ExchangeData memory _exchangeData, LoanShiftData memory _loanShift ) internal { address protoAddr = shifterRegistry.getAddr(getNameByProtocol(uint8(_loanShift.fromProtocol))); if (_loanShift.wholeDebt) { _loanShift.debtAmount = ILoanShifter(protoAddr).getLoanAmount(_loanShift.id1, _loanShift.debtAddr1); } ( uint[8] memory numData, address[8] memory addrData, uint8[3] memory enumData, bytes memory callData ) = _packData(_loanShift, _exchangeData); // encode data bytes memory paramsData = abi.encode(numData, addrData, enumData, callData, address(this)); address payable loanShifterReceiverAddr = payable(shifterRegistry.getAddr("LOAN_SHIFTER_RECEIVER")); loanShifterReceiverAddr.transfer(address(this).balance); // call FL givePermission(loanShifterReceiverAddr); lendingPool.flashLoan(loanShifterReceiverAddr, getLoanAddr(_loanShift.debtAddr1, _loanShift.fromProtocol), _loanShift.debtAmount, paramsData); removePermission(loanShifterReceiverAddr); unsubFromAutomation( _loanShift.unsub, _loanShift.id1, _loanShift.id2, _loanShift.fromProtocol, _loanShift.toProtocol ); logEvent(_exchangeData, _loanShift); } function _forkVault(LoanShiftData memory _loanShift) internal { // Create new Vault to move to if (_loanShift.id2 == 0) { _loanShift.id2 = manager.open(manager.ilks(_loanShift.id1), address(this)); } if (_loanShift.wholeDebt) { manager.shift(_loanShift.id1, _loanShift.id2); } } function _isSameTypeVaults(LoanShiftData memory _loanShift) internal pure returns (bool) { return _loanShift.fromProtocol == Protocols.MCD && _loanShift.toProtocol == Protocols.MCD && _loanShift.addrLoan1 == _loanShift.addrLoan2; } function getNameByProtocol(uint8 _proto) internal pure returns (string memory) { if (_proto == 0) { return "MCD_SHIFTER"; } else if (_proto == 1) { return "COMP_SHIFTER"; } } function getLoanAddr(address _address, Protocols _fromProtocol) internal returns (address) { if (_fromProtocol == Protocols.COMPOUND) { return CTokenInterface(_address).underlying(); } else if (_fromProtocol == Protocols.MCD) { return DAI_ADDRESS; } else { return address(0); } } function logEvent( SaverExchangeCore.ExchangeData memory _exchangeData, LoanShiftData memory _loanShift ) internal { address srcAddr = _exchangeData.srcAddr; address destAddr = _exchangeData.destAddr; uint collAmount = _exchangeData.srcAmount; uint debtAmount = _exchangeData.destAmount; if (_loanShift.swapType == SwapType.NO_SWAP) { srcAddr = _loanShift.addrLoan1; destAddr = _loanShift.debtAddr1; collAmount = _loanShift.collAmount; debtAmount = _loanShift.debtAmount; } DefisaverLogger(DEFISAVER_LOGGER) .Log(address(this), msg.sender, "LoanShifter", abi.encode( _loanShift.fromProtocol, _loanShift.toProtocol, _loanShift.swapType, srcAddr, destAddr, collAmount, debtAmount )); } function unsubFromAutomation(Unsub _unsub, uint _cdp1, uint _cdp2, Protocols _from, Protocols _to) internal { if (_unsub != Unsub.NO_UNSUB) { if (_unsub == Unsub.FIRST_UNSUB || _unsub == Unsub.BOTH_UNSUB) { unsubscribe(_cdp1, _from); } if (_unsub == Unsub.SECOND_UNSUB || _unsub == Unsub.BOTH_UNSUB) { unsubscribe(_cdp2, _to); } } } function unsubscribe(uint _cdpId, Protocols _protocol) internal { if (_cdpId != 0 && _protocol == Protocols.MCD) { IMCDSubscriptions(MCD_SUB_ADDRESS).unsubscribe(_cdpId); } if (_protocol == Protocols.COMPOUND) { ICompoundSubscriptions(COMPOUND_SUB_ADDRESS).unsubscribe(); } } function _packData( LoanShiftData memory _loanShift, SaverExchangeCore.ExchangeData memory exchangeData ) internal pure returns (uint[8] memory numData, address[8] memory addrData, uint8[3] memory enumData, bytes memory callData) { numData = [ _loanShift.collAmount, _loanShift.debtAmount, _loanShift.id1, _loanShift.id2, exchangeData.srcAmount, exchangeData.destAmount, exchangeData.minPrice, exchangeData.price0x ]; addrData = [ _loanShift.addrLoan1, _loanShift.addrLoan2, _loanShift.debtAddr1, _loanShift.debtAddr2, exchangeData.srcAddr, exchangeData.destAddr, exchangeData.exchangeAddr, exchangeData.wrapper ]; enumData = [ uint8(_loanShift.fromProtocol), uint8(_loanShift.toProtocol), uint8(_loanShift.swapType) ]; callData = exchangeData.callData; } } contract CompShifter is CompoundSaverHelper { using SafeERC20 for ERC20; address public constant COMPTROLLER_ADDR = 0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B; function getLoanAmount(uint _cdpId, address _joinAddr) public returns(uint loanAmount) { return getWholeDebt(_cdpId, _joinAddr); } function getWholeDebt(uint _cdpId, address _joinAddr) public returns(uint loanAmount) { return CTokenInterface(_joinAddr).borrowBalanceCurrent(msg.sender); } function close( address _cCollAddr, address _cBorrowAddr, uint _collAmount, uint _debtAmount ) public { address collAddr = getUnderlyingAddr(_cCollAddr); // payback debt paybackDebt(_debtAmount, _cBorrowAddr, getUnderlyingAddr(_cBorrowAddr), tx.origin); require(CTokenInterface(_cCollAddr).redeemUnderlying(_collAmount) == 0); // Send back money to repay FL if (collAddr == ETH_ADDRESS) { msg.sender.transfer(address(this).balance); } else { ERC20(collAddr).safeTransfer(msg.sender, ERC20(collAddr).balanceOf(address(this))); } } function changeDebt( address _cBorrowAddrOld, address _cBorrowAddrNew, uint _debtAmountOld, uint _debtAmountNew ) public { address borrowAddrNew = getUnderlyingAddr(_cBorrowAddrNew); // payback debt in one token paybackDebt(_debtAmountOld, _cBorrowAddrOld, getUnderlyingAddr(_cBorrowAddrOld), tx.origin); // draw debt in another one borrowCompound(_cBorrowAddrNew, _debtAmountNew); // Send back money to repay FL if (borrowAddrNew == ETH_ADDRESS) { msg.sender.transfer(address(this).balance); } else { ERC20(borrowAddrNew).safeTransfer(msg.sender, ERC20(borrowAddrNew).balanceOf(address(this))); } } function open( address _cCollAddr, address _cBorrowAddr, uint _debtAmount ) public { address collAddr = getUnderlyingAddr(_cCollAddr); address borrowAddr = getUnderlyingAddr(_cBorrowAddr); uint collAmount = 0; if (collAddr == ETH_ADDRESS) { collAmount = address(this).balance; } else { collAmount = ERC20(collAddr).balanceOf(address(this)); } depositCompound(collAddr, _cCollAddr, collAmount); // draw debt borrowCompound(_cBorrowAddr, _debtAmount); // Send back money to repay FL if (borrowAddr == ETH_ADDRESS) { msg.sender.transfer(address(this).balance); } else { ERC20(borrowAddr).safeTransfer(msg.sender, ERC20(borrowAddr).balanceOf(address(this))); } } function repayAll(address _cTokenAddr) public { address tokenAddr = getUnderlyingAddr(_cTokenAddr); uint amount = ERC20(tokenAddr).balanceOf(address(this)); if (amount != 0) { paybackDebt(amount, _cTokenAddr, tokenAddr, tx.origin); } } function depositCompound(address _tokenAddr, address _cTokenAddr, uint _amount) internal { approveCToken(_tokenAddr, _cTokenAddr); enterMarket(_cTokenAddr); if (_tokenAddr != ETH_ADDRESS) { require(CTokenInterface(_cTokenAddr).mint(_amount) == 0, "mint error"); } else { CEtherInterface(_cTokenAddr).mint{value: _amount}(); } } function borrowCompound(address _cTokenAddr, uint _amount) internal { enterMarket(_cTokenAddr); require(CTokenInterface(_cTokenAddr).borrow(_amount) == 0); } function enterMarket(address _cTokenAddr) public { address[] memory markets = new address[](1); markets[0] = _cTokenAddr; ComptrollerInterface(COMPTROLLER_ADDR).enterMarkets(markets); } } contract McdShifter is MCDSaverProxy { using SafeERC20 for ERC20; address public constant OPEN_PROXY_ACTIONS = 0x6d0984E80a86f26c0dd564ca0CF74a8E9Da03305; function getLoanAmount(uint _cdpId, address _joinAddr) public view virtual returns(uint loanAmount) { bytes32 ilk = manager.ilks(_cdpId); (, uint rate,,,) = vat.ilks(ilk); (, uint art) = vat.urns(ilk, manager.urns(_cdpId)); uint dai = vat.dai(manager.urns(_cdpId)); uint rad = sub(mul(art, rate), dai); loanAmount = rad / RAY; loanAmount = mul(loanAmount, RAY) < rad ? loanAmount + 1 : loanAmount; } function close( uint _cdpId, address _joinAddr, uint _loanAmount, uint _collateral ) public { address owner = getOwner(manager, _cdpId); bytes32 ilk = manager.ilks(_cdpId); (uint maxColl, ) = getCdpInfo(manager, _cdpId, ilk); // repay dai debt cdp paybackDebt(_cdpId, ilk, _loanAmount, owner); maxColl = _collateral > maxColl ? maxColl : _collateral; // withdraw collateral from cdp drawCollateral(_cdpId, _joinAddr, maxColl); // send back to msg.sender if (isEthJoinAddr(_joinAddr)) { msg.sender.transfer(address(this).balance); } else { ERC20 collToken = ERC20(getCollateralAddr(_joinAddr)); collToken.safeTransfer(msg.sender, collToken.balanceOf(address(this))); } } function open( uint _cdpId, address _joinAddr, uint _debtAmount ) public { uint collAmount = 0; if (isEthJoinAddr(_joinAddr)) { collAmount = address(this).balance; } else { collAmount = ERC20(address(Join(_joinAddr).gem())).balanceOf(address(this)); } if (_cdpId == 0) { openAndWithdraw(collAmount, _debtAmount, address(this), _joinAddr); } else { // add collateral addCollateral(_cdpId, _joinAddr, collAmount); // draw debt drawDai(_cdpId, manager.ilks(_cdpId), _debtAmount); } // transfer to repay FL ERC20(DAI_ADDRESS).transfer(msg.sender, ERC20(DAI_ADDRESS).balanceOf(address(this))); if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } } function openAndWithdraw(uint _collAmount, uint _debtAmount, address _proxy, address _joinAddrTo) internal { bytes32 ilk = Join(_joinAddrTo).ilk(); if (isEthJoinAddr(_joinAddrTo)) { MCDCreateProxyActions(OPEN_PROXY_ACTIONS).openLockETHAndDraw{value: address(this).balance}( address(manager), JUG_ADDRESS, _joinAddrTo, DAI_JOIN_ADDRESS, ilk, _debtAmount, _proxy ); } else { ERC20(getCollateralAddr(_joinAddrTo)).approve(OPEN_PROXY_ACTIONS, uint256(-1)); MCDCreateProxyActions(OPEN_PROXY_ACTIONS).openLockGemAndDraw( address(manager), JUG_ADDRESS, _joinAddrTo, DAI_JOIN_ADDRESS, ilk, _collAmount, _debtAmount, true, _proxy ); } } } contract AaveSaverProxy is GasBurner, SaverExchangeCore, AaveHelper { address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; uint public constant VARIABLE_RATE = 2; function repay(ExchangeData memory _data, uint _gasCost) public payable burnGas(20) { address lendingPoolCore = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); address payable user = payable(getUserAddress()); // redeem collateral address aTokenCollateral = ILendingPool(lendingPoolCore).getReserveATokenAddress(_data.srcAddr); // uint256 maxCollateral = IAToken(aTokenCollateral).balanceOf(address(this)); // don't swap more than maxCollateral // _data.srcAmount = _data.srcAmount > maxCollateral ? maxCollateral : _data.srcAmount; IAToken(aTokenCollateral).redeem(_data.srcAmount); uint256 destAmount = _data.srcAmount; if (_data.srcAddr != _data.destAddr) { // swap (, destAmount) = _sell(_data); destAmount -= getFee(destAmount, user, _gasCost, _data.destAddr); } else { destAmount -= getGasCost(destAmount, user, _gasCost, _data.destAddr); } // payback if (_data.destAddr == ETH_ADDR) { ILendingPool(lendingPool).repay{value: destAmount}(_data.destAddr, destAmount, payable(address(this))); } else { approveToken(_data.destAddr, lendingPoolCore); ILendingPool(lendingPool).repay(_data.destAddr, destAmount, payable(address(this))); } // first return 0x fee to msg.sender as it is the address that actually sent 0x fee sendContractBalance(ETH_ADDR, tx.origin, min(address(this).balance, msg.value)); // send all leftovers from dest addr to proxy owner sendFullContractBalance(_data.destAddr, user); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "AaveRepay", abi.encode(_data.srcAddr, _data.destAddr, _data.srcAmount, destAmount)); } function boost(ExchangeData memory _data, uint _gasCost) public payable burnGas(20) { address lendingPoolCore = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); (,,,uint256 borrowRateMode,,,,,,bool collateralEnabled) = ILendingPool(lendingPool).getUserReserveData(_data.destAddr, address(this)); address payable user = payable(getUserAddress()); // skipping this check as its too expensive // uint256 maxBorrow = getMaxBoost(_data.srcAddr, _data.destAddr, address(this)); // _data.srcAmount = _data.srcAmount > maxBorrow ? maxBorrow : _data.srcAmount; // borrow amount ILendingPool(lendingPool).borrow(_data.srcAddr, _data.srcAmount, borrowRateMode == 0 ? VARIABLE_RATE : borrowRateMode, AAVE_REFERRAL_CODE); uint256 destAmount; if (_data.destAddr != _data.srcAddr) { _data.srcAmount -= getFee(_data.srcAmount, user, _gasCost, _data.srcAddr); // swap (, destAmount) = _sell(_data); } else { _data.srcAmount -= getGasCost(_data.srcAmount, user, _gasCost, _data.srcAddr); destAmount = _data.srcAmount; } if (_data.destAddr == ETH_ADDR) { ILendingPool(lendingPool).deposit{value: destAmount}(_data.destAddr, destAmount, AAVE_REFERRAL_CODE); } else { approveToken(_data.destAddr, lendingPoolCore); ILendingPool(lendingPool).deposit(_data.destAddr, destAmount, AAVE_REFERRAL_CODE); } if (!collateralEnabled) { ILendingPool(lendingPool).setUserUseReserveAsCollateral(_data.destAddr, true); } // returning to msg.sender as it is the address that actually sent 0x fee sendContractBalance(ETH_ADDR, tx.origin, min(address(this).balance, msg.value)); // send all leftovers from dest addr to proxy owner sendFullContractBalance(_data.destAddr, user); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "AaveBoost", abi.encode(_data.srcAddr, _data.destAddr, _data.srcAmount, destAmount)); } } contract AaveSaverReceiver is AaveHelper, AdminAuth, SaverExchangeCore { using SafeERC20 for ERC20; address public constant AAVE_SAVER_PROXY = 0xCab7ce9148499E0dD8228c3c8cDb9B56Ac2bb57a; address public constant AAVE_BASIC_PROXY = 0xd042D4E9B4186c545648c7FfFe87125c976D110B; address public constant AETH_ADDRESS = 0x3a3A65aAb0dd2A17E3F1947bA16138cd37d08c04; function callFunction( address sender, Account.Info memory account, bytes memory data ) public { ( bytes memory exchangeDataBytes, uint256 gasCost, bool isRepay, uint256 ethAmount, uint256 txValue, address user, address proxy ) = abi.decode(data, (bytes,uint256,bool,uint256,uint256,address,address)); // withdraw eth TokenInterface(WETH_ADDRESS).withdraw(ethAmount); address lendingPoolCoreAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); // deposit eth on behalf of proxy DSProxy(payable(proxy)).execute{value: ethAmount}(AAVE_BASIC_PROXY, abi.encodeWithSignature("deposit(address,uint256)", ETH_ADDR, ethAmount)); bytes memory functionData = packFunctionCall(exchangeDataBytes, gasCost, isRepay); DSProxy(payable(proxy)).execute{value: txValue}(AAVE_SAVER_PROXY, functionData); // withdraw deposited eth DSProxy(payable(proxy)).execute(AAVE_BASIC_PROXY, abi.encodeWithSignature("withdraw(address,address,uint256,bool)", ETH_ADDR, AETH_ADDRESS, ethAmount, false)); // deposit eth, get weth and return to sender TokenInterface(WETH_ADDRESS).deposit.value(address(this).balance)(); ERC20(WETH_ADDRESS).safeTransfer(proxy, ethAmount+2); } function packFunctionCall(bytes memory _exchangeDataBytes, uint256 _gasCost, bool _isRepay) internal returns (bytes memory) { ExchangeData memory exData = unpackExchangeData(_exchangeDataBytes); bytes memory functionData; if (_isRepay) { functionData = abi.encodeWithSignature("repay((address,address,uint256,uint256,uint256,address,address,bytes,uint256),uint256)", exData, _gasCost); } else { functionData = abi.encodeWithSignature("boost((address,address,uint256,uint256,uint256,address,address,bytes,uint256),uint256)", exData, _gasCost); } return functionData; } /// @dev if contract receive eth, convert it to WETH receive() external override payable { // deposit eth and get weth if (msg.sender == owner) { TokenInterface(WETH_ADDRESS).deposit.value(address(this).balance)(); } } } contract AaveSaverTaker is DydxFlashLoanBase, ProxyPermission, GasBurner, SaverExchangeCore { address public constant WETH_ADDR = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address payable public constant AAVE_RECEIVER = 0x969DfE84ac318531f13B731c7f21af9918802B94; address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; address public constant PROXY_REGISTRY_ADDRESS = 0x4678f0a6958e4D2Bc4F1BAF7Bc52E8F3564f3fE4; function repay(ExchangeData memory _data, uint256 _gasCost) public payable { _flashLoan(_data, _gasCost, true); } function boost(ExchangeData memory _data, uint256 _gasCost) public payable { _flashLoan(_data, _gasCost, false); } /// @notice Starts the process to move users position 1 collateral and 1 borrow /// @dev User must send 2 wei with this transaction function _flashLoan(ExchangeData memory _data, uint _gasCost, bool _isRepay) internal { ISoloMargin solo = ISoloMargin(SOLO_MARGIN_ADDRESS); uint256 ethAmount = ERC20(WETH_ADDR).balanceOf(SOLO_MARGIN_ADDRESS); // Get marketId from token address uint256 marketId = _getMarketIdFromTokenAddress(WETH_ADDR); // Calculate repay amount (_amount + (2 wei)) // Approve transfer from uint256 repayAmount = _getRepaymentAmountInternal(ethAmount); ERC20(WETH_ADDR).approve(SOLO_MARGIN_ADDRESS, repayAmount); Actions.ActionArgs[] memory operations = new Actions.ActionArgs[](3); operations[0] = _getWithdrawAction(marketId, ethAmount, AAVE_RECEIVER); AAVE_RECEIVER.transfer(msg.value); bytes memory encodedData = packExchangeData(_data); operations[1] = _getCallAction( abi.encode(encodedData, _gasCost, _isRepay, ethAmount, msg.value, proxyOwner(), address(this)), AAVE_RECEIVER ); operations[2] = _getDepositAction(marketId, repayAmount, address(this)); Account.Info[] memory accountInfos = new Account.Info[](1); accountInfos[0] = _getAccountInfo(); givePermission(AAVE_RECEIVER); solo.operate(accountInfos, operations); removePermission(AAVE_RECEIVER); } } contract CompoundLoanInfo is CompoundSafetyRatio { struct LoanData { address user; uint128 ratio; address[] collAddr; address[] borrowAddr; uint[] collAmounts; uint[] borrowAmounts; } struct TokenInfo { address cTokenAddress; address underlyingTokenAddress; uint collateralFactor; uint price; } struct TokenInfoFull { address underlyingTokenAddress; uint supplyRate; uint borrowRate; uint exchangeRate; uint marketLiquidity; uint totalSupply; uint totalBorrow; uint collateralFactor; uint price; } address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant CETH_ADDRESS = 0x4Ddc2D193948926D02f9B1fE9e1daa0718270ED5; /// @notice Calcualted the ratio of coll/debt for a compound user /// @param _user Address of the user function getRatio(address _user) public view returns (uint) { // For each asset the account is in return getSafetyRatio(_user); } /// @notice Fetches Compound prices for tokens /// @param _cTokens Arr. of cTokens for which to get the prices /// @return prices Array of prices function getPrices(address[] memory _cTokens) public view returns (uint[] memory prices) { prices = new uint[](_cTokens.length); address oracleAddr = comp.oracle(); for (uint i = 0; i < _cTokens.length; ++i) { prices[i] = CompoundOracleInterface(oracleAddr).getUnderlyingPrice(_cTokens[i]); } } /// @notice Fetches Compound collateral factors for tokens /// @param _cTokens Arr. of cTokens for which to get the coll. factors /// @return collFactors Array of coll. factors function getCollFactors(address[] memory _cTokens) public view returns (uint[] memory collFactors) { collFactors = new uint[](_cTokens.length); for (uint i = 0; i < _cTokens.length; ++i) { (, collFactors[i]) = comp.markets(_cTokens[i]); } } /// @notice Fetches all the collateral/debt address and amounts, denominated in usd /// @param _user Address of the user /// @return data LoanData information function getLoanData(address _user) public view returns (LoanData memory data) { address[] memory assets = comp.getAssetsIn(_user); address oracleAddr = comp.oracle(); data = LoanData({ user: _user, ratio: 0, collAddr: new address[](assets.length), borrowAddr: new address[](assets.length), collAmounts: new uint[](assets.length), borrowAmounts: new uint[](assets.length) }); uint collPos = 0; uint borrowPos = 0; for (uint i = 0; i < assets.length; i++) { address asset = assets[i]; (, uint cTokenBalance, uint borrowBalance, uint exchangeRateMantissa) = CTokenInterface(asset).getAccountSnapshot(_user); Exp memory oraclePrice; if (cTokenBalance != 0 || borrowBalance != 0) { oraclePrice = Exp({mantissa: CompoundOracleInterface(oracleAddr).getUnderlyingPrice(asset)}); } // Sum up collateral in Usd if (cTokenBalance != 0) { Exp memory exchangeRate = Exp({mantissa: exchangeRateMantissa}); (, Exp memory tokensToUsd) = mulExp(exchangeRate, oraclePrice); data.collAddr[collPos] = asset; (, data.collAmounts[collPos]) = mulScalarTruncate(tokensToUsd, cTokenBalance); collPos++; } // Sum up debt in Usd if (borrowBalance != 0) { data.borrowAddr[borrowPos] = asset; (, data.borrowAmounts[borrowPos]) = mulScalarTruncate(oraclePrice, borrowBalance); borrowPos++; } } data.ratio = uint128(getSafetyRatio(_user)); return data; } function getTokenBalances(address _user, address[] memory _cTokens) public view returns (uint[] memory balances, uint[] memory borrows) { balances = new uint[](_cTokens.length); borrows = new uint[](_cTokens.length); for (uint i = 0; i < _cTokens.length; i++) { address asset = _cTokens[i]; (, uint cTokenBalance, uint borrowBalance, uint exchangeRateMantissa) = CTokenInterface(asset).getAccountSnapshot(_user); Exp memory exchangeRate = Exp({mantissa: exchangeRateMantissa}); (, balances[i]) = mulScalarTruncate(exchangeRate, cTokenBalance); borrows[i] = borrowBalance; } } /// @notice Fetches all the collateral/debt address and amounts, denominated in usd /// @param _users Addresses of the user /// @return loans Array of LoanData information function getLoanDataArr(address[] memory _users) public view returns (LoanData[] memory loans) { loans = new LoanData[](_users.length); for (uint i = 0; i < _users.length; ++i) { loans[i] = getLoanData(_users[i]); } } /// @notice Calcualted the ratio of coll/debt for a compound user /// @param _users Addresses of the user /// @return ratios Array of ratios function getRatios(address[] memory _users) public view returns (uint[] memory ratios) { ratios = new uint[](_users.length); for (uint i = 0; i < _users.length; ++i) { ratios[i] = getSafetyRatio(_users[i]); } } /// @notice Information about cTokens /// @param _cTokenAddresses Array of cTokens addresses /// @return tokens Array of cTokens infomartion function getTokensInfo(address[] memory _cTokenAddresses) public returns(TokenInfo[] memory tokens) { tokens = new TokenInfo[](_cTokenAddresses.length); address oracleAddr = comp.oracle(); for (uint i = 0; i < _cTokenAddresses.length; ++i) { (, uint collFactor) = comp.markets(_cTokenAddresses[i]); tokens[i] = TokenInfo({ cTokenAddress: _cTokenAddresses[i], underlyingTokenAddress: getUnderlyingAddr(_cTokenAddresses[i]), collateralFactor: collFactor, price: CompoundOracleInterface(oracleAddr).getUnderlyingPrice(_cTokenAddresses[i]) }); } } /// @notice Information about cTokens /// @param _cTokenAddresses Array of cTokens addresses /// @return tokens Array of cTokens infomartion function getFullTokensInfo(address[] memory _cTokenAddresses) public returns(TokenInfoFull[] memory tokens) { tokens = new TokenInfoFull[](_cTokenAddresses.length); address oracleAddr = comp.oracle(); for (uint i = 0; i < _cTokenAddresses.length; ++i) { (, uint collFactor) = comp.markets(_cTokenAddresses[i]); CTokenInterface cToken = CTokenInterface(_cTokenAddresses[i]); tokens[i] = TokenInfoFull({ underlyingTokenAddress: getUnderlyingAddr(_cTokenAddresses[i]), supplyRate: cToken.supplyRatePerBlock(), borrowRate: cToken.borrowRatePerBlock(), exchangeRate: cToken.exchangeRateCurrent(), marketLiquidity: cToken.getCash(), totalSupply: cToken.totalSupply(), totalBorrow: cToken.totalBorrowsCurrent(), collateralFactor: collFactor, price: CompoundOracleInterface(oracleAddr).getUnderlyingPrice(_cTokenAddresses[i]) }); } } /// @notice Returns the underlying address of the cToken asset /// @param _cTokenAddress cToken address /// @return Token address of the cToken specified function getUnderlyingAddr(address _cTokenAddress) internal returns (address) { if (_cTokenAddress == CETH_ADDRESS) { return ETH_ADDRESS; } else { return CTokenInterface(_cTokenAddress).underlying(); } } } contract CompLeverage is DFSExchangeCore, CompBalance { address public constant C_COMP_ADDR = 0x70e36f6BF80a52b3B46b3aF8e106CC0ed743E8e4; address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant CETH_ADDRESS = 0x4Ddc2D193948926D02f9B1fE9e1daa0718270ED5; address payable public constant WALLET_ADDR = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; address public constant DISCOUNT_ADDR = 0x1b14E8D511c9A4395425314f849bD737BAF8208F; address public constant COMPTROLLER_ADDR = 0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B; address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); /// @notice Should claim COMP and sell it to the specified token and deposit it back /// @param exchangeData Standard Exchange struct /// @param _cTokensSupply List of cTokens user is supplying /// @param _cTokensBorrow List of cTokens user is borrowing /// @param _cDepositAddr The cToken address of the asset you want to deposit /// @param _inMarket Flag if the cToken is used as collateral function claimAndSell( ExchangeData memory exchangeData, address[] memory _cTokensSupply, address[] memory _cTokensBorrow, address _cDepositAddr, bool _inMarket ) public payable { // Claim COMP token _claim(address(this), _cTokensSupply, _cTokensBorrow); uint compBalance = ERC20(COMP_ADDR).balanceOf(address(this)); uint depositAmount = 0; // Exchange COMP if (exchangeData.srcAddr != address(0)) { exchangeData.dfsFeeDivider = 400; // 0.25% exchangeData.srcAmount = compBalance; (, depositAmount) = _sell(exchangeData); // if we have no deposit after, send back tokens to the user if (_cDepositAddr == address(0)) { if (exchangeData.destAddr != ETH_ADDRESS) { ERC20(exchangeData.destAddr).safeTransfer(msg.sender, depositAmount); } else { msg.sender.transfer(address(this).balance); } } } // Deposit back a token if (_cDepositAddr != address(0)) { // if we are just depositing COMP without a swap if (_cDepositAddr == C_COMP_ADDR) { depositAmount = compBalance; } address tokenAddr = getUnderlyingAddr(_cDepositAddr); deposit(tokenAddr, _cDepositAddr, depositAmount, _inMarket); } logger.Log(address(this), msg.sender, "CompLeverage", abi.encode(compBalance, depositAmount, _cDepositAddr, exchangeData.destAmount)); } function getUnderlyingAddr(address _cTokenAddress) internal returns (address) { if (_cTokenAddress == CETH_ADDRESS) { return ETH_ADDRESS; } else { return CTokenInterface(_cTokenAddress).underlying(); } } function deposit(address _tokenAddr, address _cTokenAddr, uint _amount, bool _inMarket) public burnGas(5) payable { approveToken(_tokenAddr, _cTokenAddr); if (!_inMarket) { enterMarket(_cTokenAddr); } if (_tokenAddr != ETH_ADDRESS) { require(CTokenInterface(_cTokenAddr).mint(_amount) == 0); } else { CEtherInterface(_cTokenAddr).mint{value: msg.value}(); // reverts on fail } } function enterMarket(address _cTokenAddr) public { address[] memory markets = new address[](1); markets[0] = _cTokenAddr; ComptrollerInterface(COMPTROLLER_ADDR).enterMarkets(markets); } function approveToken(address _tokenAddr, address _cTokenAddr) internal { if (_tokenAddr != ETH_ADDRESS) { ERC20(_tokenAddr).safeApprove(_cTokenAddr, uint(-1)); } } } contract CompoundCreateReceiver is FlashLoanReceiverBase, SaverExchangeCore { ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); ShifterRegistry public constant shifterRegistry = ShifterRegistry(0x2E82103bD91053C781aaF39da17aE58ceE39d0ab); address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address payable public constant WALLET_ADDR = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; address public constant DISCOUNT_ADDR = 0x1b14E8D511c9A4395425314f849bD737BAF8208F; // solhint-disable-next-line no-empty-blocks constructor() public FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) {} struct CompCreateData { address payable proxyAddr; bytes proxyData; address cCollAddr; address cDebtAddr; } /// @notice Called by Aave when sending back the FL amount /// @param _reserve The address of the borrowed token /// @param _amount Amount of FL tokens received /// @param _fee FL Aave fee /// @param _params The params that are sent from the original FL caller contract function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { // Format the call data for DSProxy (CompCreateData memory compCreate, ExchangeData memory exchangeData) = packFunctionCall(_amount, _fee, _params); address leveragedAsset = _reserve; // If the assets are different if (compCreate.cCollAddr != compCreate.cDebtAddr) { (, uint sellAmount) = _sell(exchangeData); getFee(sellAmount, exchangeData.destAddr, compCreate.proxyAddr); leveragedAsset = exchangeData.destAddr; } // Send amount to DSProxy sendToProxy(compCreate.proxyAddr, leveragedAsset); address compOpenProxy = shifterRegistry.getAddr("COMP_SHIFTER"); // Execute the DSProxy call DSProxyInterface(compCreate.proxyAddr).execute(compOpenProxy, compCreate.proxyData); // Repay the loan with the money DSProxy sent back transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { // solhint-disable-next-line avoid-tx-origin tx.origin.transfer(address(this).balance); } } /// @notice Formats function data call so we can call it through DSProxy /// @param _amount Amount of FL /// @param _fee Fee of the FL /// @param _params Saver proxy params function packFunctionCall(uint _amount, uint _fee, bytes memory _params) internal pure returns (CompCreateData memory compCreate, ExchangeData memory exchangeData) { ( uint[4] memory numData, // srcAmount, destAmount, minPrice, price0x address[6] memory cAddresses, // cCollAddr, cDebtAddr, srcAddr, destAddr, exchangeAddr, wrapper bytes memory callData, address proxy ) = abi.decode(_params, (uint256[4],address[6],bytes,address)); bytes memory proxyData = abi.encodeWithSignature( "open(address,address,uint256)", cAddresses[0], cAddresses[1], (_amount + _fee)); exchangeData = SaverExchangeCore.ExchangeData({ srcAddr: cAddresses[2], destAddr: cAddresses[3], srcAmount: numData[0], destAmount: numData[1], minPrice: numData[2], wrapper: cAddresses[5], exchangeAddr: cAddresses[4], callData: callData, price0x: numData[3] }); compCreate = CompCreateData({ proxyAddr: payable(proxy), proxyData: proxyData, cCollAddr: cAddresses[0], cDebtAddr: cAddresses[1] }); return (compCreate, exchangeData); } /// @notice Send the FL funds received to DSProxy /// @param _proxy DSProxy address /// @param _reserve Token address function sendToProxy(address payable _proxy, address _reserve) internal { if (_reserve != ETH_ADDRESS) { ERC20(_reserve).safeTransfer(_proxy, ERC20(_reserve).balanceOf(address(this))); } else { _proxy.transfer(address(this).balance); } } function getFee(uint _amount, address _tokenAddr, address _proxy) internal returns (uint feeAmount) { uint fee = 400; DSProxy proxy = DSProxy(payable(_proxy)); address user = proxy.owner(); if (Discount(DISCOUNT_ADDR).isCustomFeeSet(user)) { fee = Discount(DISCOUNT_ADDR).getCustomServiceFee(user); } feeAmount = (fee == 0) ? 0 : (_amount / fee); // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } if (_tokenAddr == ETH_ADDRESS) { WALLET_ADDR.transfer(feeAmount); } else { ERC20(_tokenAddr).safeTransfer(WALLET_ADDR, feeAmount); } } // solhint-disable-next-line no-empty-blocks receive() external override(FlashLoanReceiverBase, SaverExchangeCore) payable {} } contract CompoundSaverFlashLoan is FlashLoanReceiverBase, SaverExchangeCore { ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); address payable public COMPOUND_SAVER_FLASH_PROXY = 0xcEAb38B5C88F33Dabe4D31BDD384E08215526632; address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public owner; using SafeERC20 for ERC20; constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public { owner = msg.sender; } /// @notice Called by Aave when sending back the FL amount /// @param _reserve The address of the borrowed token /// @param _amount Amount of FL tokens received /// @param _fee FL Aave fee /// @param _params The params that are sent from the original FL caller contract function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { // Format the call data for DSProxy (bytes memory proxyData, address payable proxyAddr) = packFunctionCall(_amount, _fee, _params); // Send Flash loan amount to DSProxy sendLoanToProxy(proxyAddr, _reserve, _amount); // Execute the DSProxy call DSProxyInterface(proxyAddr).execute(COMPOUND_SAVER_FLASH_PROXY, proxyData); // Repay the loan with the money DSProxy sent back transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } } /// @notice Formats function data call so we can call it through DSProxy /// @param _amount Amount of FL /// @param _fee Fee of the FL /// @param _params Saver proxy params /// @return proxyData Formated function call data function packFunctionCall(uint _amount, uint _fee, bytes memory _params) internal pure returns (bytes memory proxyData, address payable) { ( bytes memory exDataBytes, address[2] memory cAddresses, // cCollAddress, cBorrowAddress uint256 gasCost, bool isRepay, address payable proxyAddr ) = abi.decode(_params, (bytes,address[2],uint256,bool,address)); ExchangeData memory _exData = unpackExchangeData(exDataBytes); uint[2] memory flashLoanData = [_amount, _fee]; if (isRepay) { proxyData = abi.encodeWithSignature("flashRepay((address,address,uint256,uint256,uint256,address,address,bytes,uint256),address[2],uint256,uint256[2])", _exData, cAddresses, gasCost, flashLoanData); } else { proxyData = abi.encodeWithSignature("flashBoost((address,address,uint256,uint256,uint256,address,address,bytes,uint256),address[2],uint256,uint256[2])", _exData, cAddresses, gasCost, flashLoanData); } return (proxyData, proxyAddr); } /// @notice Send the FL funds received to DSProxy /// @param _proxy DSProxy address /// @param _reserve Token address /// @param _amount Amount of tokens function sendLoanToProxy(address payable _proxy, address _reserve, uint _amount) internal { if (_reserve != ETH_ADDRESS) { ERC20(_reserve).safeTransfer(_proxy, _amount); } _proxy.transfer(address(this).balance); } receive() external override(SaverExchangeCore, FlashLoanReceiverBase) payable {} } contract CompoundSaverFlashProxy is SaverExchangeCore, CompoundSaverHelper { address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; using SafeERC20 for ERC20; /// @notice Repays the position and sends tokens back for FL /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress] /// @param _gasCost Gas cost for transaction /// @param _flashLoanData Data about FL [amount, fee] function flashRepay( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost, uint[2] memory _flashLoanData // amount, fee ) public payable { enterMarket(_cAddresses[0], _cAddresses[1]); address payable user = payable(getUserAddress()); uint flashBorrowed = _flashLoanData[0] + _flashLoanData[1]; uint maxColl = getMaxCollateral(_cAddresses[0], address(this)); // draw max coll require(CTokenInterface(_cAddresses[0]).redeemUnderlying(maxColl) == 0); address collToken = getUnderlyingAddr(_cAddresses[0]); address borrowToken = getUnderlyingAddr(_cAddresses[1]); uint swapAmount = 0; if (collToken != borrowToken) { // swap max coll + loanAmount _exData.srcAmount = maxColl + _flashLoanData[0]; (,swapAmount) = _sell(_exData); // get fee swapAmount -= getFee(swapAmount, user, _gasCost, _cAddresses[1]); } else { swapAmount = (maxColl + _flashLoanData[0]); swapAmount -= getGasCost(swapAmount, _gasCost, _cAddresses[1]); } // payback debt paybackDebt(swapAmount, _cAddresses[1], borrowToken, user); // draw collateral for loanAmount + loanFee require(CTokenInterface(_cAddresses[0]).redeemUnderlying(flashBorrowed) == 0); // repay flash loan returnFlashLoan(collToken, flashBorrowed); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "CompoundRepay", abi.encode(_exData.srcAmount, swapAmount, collToken, borrowToken)); } /// @notice Boosts the position and sends tokens back for FL /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress] /// @param _gasCost Gas cost for specific transaction /// @param _flashLoanData Data about FL [amount, fee] function flashBoost( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost, uint[2] memory _flashLoanData // amount, fee ) public payable { enterMarket(_cAddresses[0], _cAddresses[1]); address payable user = payable(getUserAddress()); uint flashBorrowed = _flashLoanData[0] + _flashLoanData[1]; // borrow max amount uint borrowAmount = getMaxBorrow(_cAddresses[1], address(this)); require(CTokenInterface(_cAddresses[1]).borrow(borrowAmount) == 0); address collToken = getUnderlyingAddr(_cAddresses[0]); address borrowToken = getUnderlyingAddr(_cAddresses[1]); uint swapAmount = 0; if (collToken != borrowToken) { // get dfs fee borrowAmount -= getFee((borrowAmount + _flashLoanData[0]), user, _gasCost, _cAddresses[1]); _exData.srcAmount = (borrowAmount + _flashLoanData[0]); (,swapAmount) = _sell(_exData); } else { swapAmount = (borrowAmount + _flashLoanData[0]); swapAmount -= getGasCost(swapAmount, _gasCost, _cAddresses[1]); } // deposit swaped collateral depositCollateral(collToken, _cAddresses[0], swapAmount); // borrow token to repay flash loan require(CTokenInterface(_cAddresses[1]).borrow(flashBorrowed) == 0); // repay flash loan returnFlashLoan(borrowToken, flashBorrowed); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "CompoundBoost", abi.encode(_exData.srcAmount, swapAmount, collToken, borrowToken)); } /// @notice Helper method to deposit tokens in Compound /// @param _collToken Token address of the collateral /// @param _cCollToken CToken address of the collateral /// @param _depositAmount Amount to deposit function depositCollateral(address _collToken, address _cCollToken, uint _depositAmount) internal { approveCToken(_collToken, _cCollToken); if (_collToken != ETH_ADDRESS) { require(CTokenInterface(_cCollToken).mint(_depositAmount) == 0); } else { CEtherInterface(_cCollToken).mint{value: _depositAmount}(); // reverts on fail } } /// @notice Returns the tokens/ether to the msg.sender which is the FL contract /// @param _tokenAddr Address of token which we return /// @param _amount Amount to return function returnFlashLoan(address _tokenAddr, uint _amount) internal { if (_tokenAddr != ETH_ADDRESS) { ERC20(_tokenAddr).safeTransfer(msg.sender, _amount); } msg.sender.transfer(address(this).balance); } } contract CompoundSaverProxy is CompoundSaverHelper, SaverExchangeCore { DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); /// @notice Withdraws collateral, converts to borrowed token and repays debt /// @dev Called through the DSProxy /// @param _exData Exchange data /// @param _cAddresses Coll/Debt addresses [cCollAddress, cBorrowAddress] /// @param _gasCost Gas cost for specific transaction function repay( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost ) public payable { enterMarket(_cAddresses[0], _cAddresses[1]); address payable user = payable(getUserAddress()); uint maxColl = getMaxCollateral(_cAddresses[0], address(this)); uint collAmount = (_exData.srcAmount > maxColl) ? maxColl : _exData.srcAmount; require(CTokenInterface(_cAddresses[0]).redeemUnderlying(collAmount) == 0); address collToken = getUnderlyingAddr(_cAddresses[0]); address borrowToken = getUnderlyingAddr(_cAddresses[1]); uint swapAmount = 0; if (collToken != borrowToken) { _exData.srcAmount = collAmount; (, swapAmount) = _sell(_exData); swapAmount -= getFee(swapAmount, user, _gasCost, _cAddresses[1]); } else { swapAmount = collAmount; swapAmount -= getGasCost(swapAmount, _gasCost, _cAddresses[1]); } paybackDebt(swapAmount, _cAddresses[1], borrowToken, user); // handle 0x fee tx.origin.transfer(address(this).balance); // log amount, collToken, borrowToken logger.Log(address(this), msg.sender, "CompoundRepay", abi.encode(_exData.srcAmount, swapAmount, collToken, borrowToken)); } /// @notice Borrows token, converts to collateral, and adds to position /// @dev Called through the DSProxy /// @param _exData Exchange data /// @param _cAddresses Coll/Debt addresses [cCollAddress, cBorrowAddress] /// @param _gasCost Gas cost for specific transaction function boost( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost ) public payable { enterMarket(_cAddresses[0], _cAddresses[1]); address payable user = payable(getUserAddress()); uint maxBorrow = getMaxBorrow(_cAddresses[1], address(this)); uint borrowAmount = (_exData.srcAmount > maxBorrow) ? maxBorrow : _exData.srcAmount; require(CTokenInterface(_cAddresses[1]).borrow(borrowAmount) == 0); address collToken = getUnderlyingAddr(_cAddresses[0]); address borrowToken = getUnderlyingAddr(_cAddresses[1]); uint swapAmount = 0; if (collToken != borrowToken) { borrowAmount -= getFee(borrowAmount, user, _gasCost, _cAddresses[1]); _exData.srcAmount = borrowAmount; (,swapAmount) = _sell(_exData); } else { swapAmount = borrowAmount; swapAmount -= getGasCost(swapAmount, _gasCost, _cAddresses[1]); } approveCToken(collToken, _cAddresses[0]); if (collToken != ETH_ADDRESS) { require(CTokenInterface(_cAddresses[0]).mint(swapAmount) == 0); } else { CEtherInterface(_cAddresses[0]).mint{value: swapAmount}(); // reverts on fail } // handle 0x fee tx.origin.transfer(address(this).balance); // log amount, collToken, borrowToken logger.Log(address(this), msg.sender, "CompoundBoost", abi.encode(_exData.srcAmount, swapAmount, collToken, borrowToken)); } } contract CreamSaverFlashLoan is FlashLoanReceiverBase, SaverExchangeCore { ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); address payable public COMPOUND_SAVER_FLASH_PROXY = 0x1e012554891d271eDc80ba8eB146EA5FF596fA51; address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public owner; using SafeERC20 for ERC20; constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public { owner = msg.sender; } /// @notice Called by Aave when sending back the FL amount /// @param _reserve The address of the borrowed token /// @param _amount Amount of FL tokens received /// @param _fee FL Aave fee /// @param _params The params that are sent from the original FL caller contract function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { // Format the call data for DSProxy (bytes memory proxyData, address payable proxyAddr) = packFunctionCall(_amount, _fee, _params); // Send Flash loan amount to DSProxy sendLoanToProxy(proxyAddr, _reserve, _amount); // Execute the DSProxy call DSProxyInterface(proxyAddr).execute(COMPOUND_SAVER_FLASH_PROXY, proxyData); // Repay the loan with the money DSProxy sent back transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } } /// @notice Formats function data call so we can call it through DSProxy /// @param _amount Amount of FL /// @param _fee Fee of the FL /// @param _params Saver proxy params /// @return proxyData Formated function call data function packFunctionCall(uint _amount, uint _fee, bytes memory _params) internal pure returns (bytes memory proxyData, address payable) { ( bytes memory exDataBytes, address[2] memory cAddresses, // cCollAddress, cBorrowAddress uint256 gasCost, bool isRepay, address payable proxyAddr ) = abi.decode(_params, (bytes,address[2],uint256,bool,address)); ExchangeData memory _exData = unpackExchangeData(exDataBytes); uint[2] memory flashLoanData = [_amount, _fee]; if (isRepay) { proxyData = abi.encodeWithSignature("flashRepay((address,address,uint256,uint256,uint256,address,address,bytes,uint256),address[2],uint256,uint256[2])", _exData, cAddresses, gasCost, flashLoanData); } else { proxyData = abi.encodeWithSignature("flashBoost((address,address,uint256,uint256,uint256,address,address,bytes,uint256),address[2],uint256,uint256[2])", _exData, cAddresses, gasCost, flashLoanData); } return (proxyData, proxyAddr); } /// @notice Send the FL funds received to DSProxy /// @param _proxy DSProxy address /// @param _reserve Token address /// @param _amount Amount of tokens function sendLoanToProxy(address payable _proxy, address _reserve, uint _amount) internal { if (_reserve != ETH_ADDRESS) { ERC20(_reserve).safeTransfer(_proxy, _amount); } _proxy.transfer(address(this).balance); } receive() external override(SaverExchangeCore, FlashLoanReceiverBase) payable {} } contract CreamSaverFlashProxy is SaverExchangeCore, CreamSaverHelper { address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; using SafeERC20 for ERC20; /// @notice Repays the position and sends tokens back for FL /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress] /// @param _gasCost Gas cost for transaction /// @param _flashLoanData Data about FL [amount, fee] function flashRepay( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost, uint[2] memory _flashLoanData // amount, fee ) public payable { enterMarket(_cAddresses[0], _cAddresses[1]); address payable user = payable(getUserAddress()); uint flashBorrowed = _flashLoanData[0] + _flashLoanData[1]; uint maxColl = getMaxCollateral(_cAddresses[0], address(this)); // draw max coll require(CTokenInterface(_cAddresses[0]).redeemUnderlying(maxColl) == 0); address collToken = getUnderlyingAddr(_cAddresses[0]); address borrowToken = getUnderlyingAddr(_cAddresses[1]); uint swapAmount = 0; if (collToken != borrowToken) { // swap max coll + loanAmount _exData.srcAmount = maxColl + _flashLoanData[0]; (,swapAmount) = _sell(_exData); // get fee swapAmount -= getFee(swapAmount, user, _gasCost, _cAddresses[1]); } else { swapAmount = (maxColl + _flashLoanData[0]); swapAmount -= getGasCost(swapAmount, _gasCost, _cAddresses[1]); } // payback debt paybackDebt(swapAmount, _cAddresses[1], borrowToken, user); // draw collateral for loanAmount + loanFee require(CTokenInterface(_cAddresses[0]).redeemUnderlying(flashBorrowed) == 0); // repay flash loan returnFlashLoan(collToken, flashBorrowed); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "CreamRepay", abi.encode(_exData.srcAmount, swapAmount, collToken, borrowToken)); } /// @notice Boosts the position and sends tokens back for FL /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress] /// @param _gasCost Gas cost for specific transaction /// @param _flashLoanData Data about FL [amount, fee] function flashBoost( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost, uint[2] memory _flashLoanData // amount, fee ) public payable { enterMarket(_cAddresses[0], _cAddresses[1]); address payable user = payable(getUserAddress()); uint flashBorrowed = _flashLoanData[0] + _flashLoanData[1]; // borrow max amount uint borrowAmount = getMaxBorrow(_cAddresses[1], address(this)); require(CTokenInterface(_cAddresses[1]).borrow(borrowAmount) == 0); address collToken = getUnderlyingAddr(_cAddresses[0]); address borrowToken = getUnderlyingAddr(_cAddresses[1]); uint swapAmount = 0; if (collToken != borrowToken) { // get dfs fee borrowAmount -= getFee((borrowAmount + _flashLoanData[0]), user, _gasCost, _cAddresses[1]); _exData.srcAmount = (borrowAmount + _flashLoanData[0]); (,swapAmount) = _sell(_exData); } else { swapAmount = (borrowAmount + _flashLoanData[0]); swapAmount -= getGasCost(swapAmount, _gasCost, _cAddresses[1]); } // deposit swaped collateral depositCollateral(collToken, _cAddresses[0], swapAmount); // borrow token to repay flash loan require(CTokenInterface(_cAddresses[1]).borrow(flashBorrowed) == 0); // repay flash loan returnFlashLoan(borrowToken, flashBorrowed); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "CreamBoost", abi.encode(_exData.srcAmount, swapAmount, collToken, borrowToken)); } /// @notice Helper method to deposit tokens in Compound /// @param _collToken Token address of the collateral /// @param _cCollToken CToken address of the collateral /// @param _depositAmount Amount to deposit function depositCollateral(address _collToken, address _cCollToken, uint _depositAmount) internal { approveCToken(_collToken, _cCollToken); if (_collToken != ETH_ADDRESS) { require(CTokenInterface(_cCollToken).mint(_depositAmount) == 0); } else { CEtherInterface(_cCollToken).mint{value: _depositAmount}(); // reverts on fail } } /// @notice Returns the tokens/ether to the msg.sender which is the FL contract /// @param _tokenAddr Address of token which we return /// @param _amount Amount to return function returnFlashLoan(address _tokenAddr, uint _amount) internal { if (_tokenAddr != ETH_ADDRESS) { ERC20(_tokenAddr).safeTransfer(msg.sender, _amount); } msg.sender.transfer(address(this).balance); } } contract CreamSaverProxy is CreamSaverHelper, SaverExchangeCore { DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); /// @notice Withdraws collateral, converts to borrowed token and repays debt /// @dev Called through the DSProxy /// @param _exData Exchange data /// @param _cAddresses Coll/Debt addresses [cCollAddress, cBorrowAddress] /// @param _gasCost Gas cost for specific transaction function repay( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost ) public payable { enterMarket(_cAddresses[0], _cAddresses[1]); address payable user = payable(getUserAddress()); uint maxColl = getMaxCollateral(_cAddresses[0], address(this)); uint collAmount = (_exData.srcAmount > maxColl) ? maxColl : _exData.srcAmount; require(CTokenInterface(_cAddresses[0]).redeemUnderlying(collAmount) == 0); address collToken = getUnderlyingAddr(_cAddresses[0]); address borrowToken = getUnderlyingAddr(_cAddresses[1]); uint swapAmount = 0; if (collToken != borrowToken) { (, swapAmount) = _sell(_exData); swapAmount -= getFee(swapAmount, user, _gasCost, _cAddresses[1]); } else { swapAmount = collAmount; swapAmount -= getGasCost(swapAmount, _gasCost, _cAddresses[1]); } paybackDebt(swapAmount, _cAddresses[1], borrowToken, user); // handle 0x fee tx.origin.transfer(address(this).balance); // log amount, collToken, borrowToken logger.Log(address(this), msg.sender, "CreamRepay", abi.encode(_exData.srcAmount, swapAmount, collToken, borrowToken)); } /// @notice Borrows token, converts to collateral, and adds to position /// @dev Called through the DSProxy /// @param _exData Exchange data /// @param _cAddresses Coll/Debt addresses [cCollAddress, cBorrowAddress] /// @param _gasCost Gas cost for specific transaction function boost( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost ) public payable { enterMarket(_cAddresses[0], _cAddresses[1]); address payable user = payable(getUserAddress()); uint maxBorrow = getMaxBorrow(_cAddresses[1], address(this)); uint borrowAmount = (_exData.srcAmount > maxBorrow) ? maxBorrow : _exData.srcAmount; require(CTokenInterface(_cAddresses[1]).borrow(borrowAmount) == 0); address collToken = getUnderlyingAddr(_cAddresses[0]); address borrowToken = getUnderlyingAddr(_cAddresses[1]); uint swapAmount = 0; if (collToken != borrowToken) { borrowAmount -= getFee(borrowAmount, user, _gasCost, _cAddresses[1]); _exData.srcAmount = borrowAmount; (,swapAmount) = _sell(_exData); } else { swapAmount = borrowAmount; swapAmount -= getGasCost(swapAmount, _gasCost, _cAddresses[1]); } approveCToken(collToken, _cAddresses[0]); if (collToken != ETH_ADDRESS) { require(CTokenInterface(_cAddresses[0]).mint(swapAmount) == 0); } else { CEtherInterface(_cAddresses[0]).mint{value: swapAmount}(); // reverts on fail } // handle 0x fee tx.origin.transfer(address(this).balance); // log amount, collToken, borrowToken logger.Log(address(this), msg.sender, "CreamBoost", abi.encode(_exData.srcAmount, swapAmount, collToken, borrowToken)); } } contract SaverExchange is SaverExchangeCore, AdminAuth, GasBurner { using SafeERC20 for ERC20; uint256 public constant SERVICE_FEE = 800; // 0.125% Fee // solhint-disable-next-line const-name-snakecase DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); uint public burnAmount = 10; /// @notice Takes a src amount of tokens and converts it into the dest token /// @dev Takes fee from the _srcAmount before the exchange /// @param exData [srcAddr, destAddr, srcAmount, destAmount, minPrice, exchangeType, exchangeAddr, callData, price0x] /// @param _user User address who called the exchange function sell(ExchangeData memory exData, address payable _user) public payable burnGas(burnAmount) { // take fee uint dfsFee = getFee(exData.srcAmount, exData.srcAddr); exData.srcAmount = sub(exData.srcAmount, dfsFee); // Perform the exchange (address wrapper, uint destAmount) = _sell(exData); // send back any leftover ether or tokens sendLeftover(exData.srcAddr, exData.destAddr, _user); // log the event logger.Log(address(this), msg.sender, "ExchangeSell", abi.encode(wrapper, exData.srcAddr, exData.destAddr, exData.srcAmount, destAmount)); } /// @notice Takes a dest amount of tokens and converts it from the src token /// @dev Send always more than needed for the swap, extra will be returned /// @param exData [srcAddr, destAddr, srcAmount, destAmount, minPrice, exchangeType, exchangeAddr, callData, price0x] /// @param _user User address who called the exchange function buy(ExchangeData memory exData, address payable _user) public payable burnGas(burnAmount){ uint dfsFee = getFee(exData.srcAmount, exData.srcAddr); exData.srcAmount = sub(exData.srcAmount, dfsFee); // Perform the exchange (address wrapper, uint srcAmount) = _buy(exData); // send back any leftover ether or tokens sendLeftover(exData.srcAddr, exData.destAddr, _user); // log the event logger.Log(address(this), msg.sender, "ExchangeBuy", abi.encode(wrapper, exData.srcAddr, exData.destAddr, srcAmount, exData.destAmount)); } /// @notice Takes a feePercentage and sends it to wallet /// @param _amount Dai amount of the whole trade /// @param _token Address of the token /// @return feeAmount Amount in Dai owner earned on the fee function getFee(uint256 _amount, address _token) internal returns (uint256 feeAmount) { uint256 fee = SERVICE_FEE; if (Discount(DISCOUNT_ADDRESS).isCustomFeeSet(msg.sender)) { fee = Discount(DISCOUNT_ADDRESS).getCustomServiceFee(msg.sender); } if (fee == 0) { feeAmount = 0; } else { feeAmount = _amount / fee; if (_token == KYBER_ETH_ADDRESS) { WALLET_ID.transfer(feeAmount); } else { ERC20(_token).safeTransfer(WALLET_ID, feeAmount); } } } /// @notice Changes the amount of gas token we burn for each call /// @dev Only callable by the owner /// @param _newBurnAmount New amount of gas tokens to be burned function changeBurnAmount(uint _newBurnAmount) public { require(owner == msg.sender); burnAmount = _newBurnAmount; } } contract DFSExchange is DFSExchangeCore, AdminAuth, GasBurner { using SafeERC20 for ERC20; uint256 public constant SERVICE_FEE = 800; // 0.125% Fee // solhint-disable-next-line const-name-snakecase DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); uint public burnAmount = 10; /// @notice Takes a src amount of tokens and converts it into the dest token /// @dev Takes fee from the _srcAmount before the exchange /// @param exData [srcAddr, destAddr, srcAmount, destAmount, minPrice, exchangeType, exchangeAddr, callData, price0x] /// @param _user User address who called the exchange function sell(ExchangeData memory exData, address payable _user) public payable burnGas(burnAmount) { exData.dfsFeeDivider = SERVICE_FEE; // Perform the exchange (address wrapper, uint destAmount) = _sell(exData); // send back any leftover ether or tokens sendLeftover(exData.srcAddr, exData.destAddr, _user); // log the event logger.Log(address(this), msg.sender, "ExchangeSell", abi.encode(wrapper, exData.srcAddr, exData.destAddr, exData.srcAmount, destAmount)); } /// @notice Takes a dest amount of tokens and converts it from the src token /// @dev Send always more than needed for the swap, extra will be returned /// @param exData [srcAddr, destAddr, srcAmount, destAmount, minPrice, exchangeType, exchangeAddr, callData, price0x] /// @param _user User address who called the exchange function buy(ExchangeData memory exData, address payable _user) public payable burnGas(burnAmount){ exData.dfsFeeDivider = SERVICE_FEE; // Perform the exchange (address wrapper, uint srcAmount) = _buy(exData); // send back any leftover ether or tokens sendLeftover(exData.srcAddr, exData.destAddr, _user); // log the event logger.Log(address(this), msg.sender, "ExchangeBuy", abi.encode(wrapper, exData.srcAddr, exData.destAddr, srcAmount, exData.destAmount)); } /// @notice Changes the amount of gas token we burn for each call /// @dev Only callable by the owner /// @param _newBurnAmount New amount of gas tokens to be burned function changeBurnAmount(uint _newBurnAmount) public { require(owner == msg.sender); burnAmount = _newBurnAmount; } } contract MCDSaverFlashLoan is MCDSaverProxy, AdminAuth, FlashLoanReceiverBase { ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public {} struct SaverData { uint cdpId; uint gasCost; uint loanAmount; uint fee; address joinAddr; } function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { //check the contract has the specified balance require(_amount <= getBalanceInternal(address(this), _reserve), "Invalid balance for the contract"); ( bytes memory exDataBytes, uint cdpId, uint gasCost, address joinAddr, bool isRepay ) = abi.decode(_params, (bytes,uint256,uint256,address,bool)); ExchangeData memory exchangeData = unpackExchangeData(exDataBytes); SaverData memory saverData = SaverData({ cdpId: cdpId, gasCost: gasCost, loanAmount: _amount, fee: _fee, joinAddr: joinAddr }); if (isRepay) { repayWithLoan(exchangeData, saverData); } else { boostWithLoan(exchangeData, saverData); } transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } } function boostWithLoan( ExchangeData memory _exchangeData, SaverData memory _saverData ) internal { address user = getOwner(manager, _saverData.cdpId); // Draw users Dai uint maxDebt = getMaxDebt(_saverData.cdpId, manager.ilks(_saverData.cdpId)); uint daiDrawn = drawDai(_saverData.cdpId, manager.ilks(_saverData.cdpId), maxDebt); // Swap _exchangeData.srcAmount = daiDrawn + _saverData.loanAmount - takeFee(_saverData.gasCost, daiDrawn + _saverData.loanAmount); _exchangeData.user = user; _exchangeData.dfsFeeDivider = isAutomation() ? AUTOMATIC_SERVICE_FEE : MANUAL_SERVICE_FEE; (, uint swapedAmount) = _sell(_exchangeData); // Return collateral addCollateral(_saverData.cdpId, _saverData.joinAddr, swapedAmount); // Draw Dai to repay the flash loan drawDai(_saverData.cdpId, manager.ilks(_saverData.cdpId), (_saverData.loanAmount + _saverData.fee)); logger.Log(address(this), msg.sender, "MCDFlashBoost", abi.encode(_saverData.cdpId, user, _exchangeData.srcAmount, swapedAmount)); } function repayWithLoan( ExchangeData memory _exchangeData, SaverData memory _saverData ) internal { address user = getOwner(manager, _saverData.cdpId); bytes32 ilk = manager.ilks(_saverData.cdpId); // Draw collateral uint maxColl = getMaxCollateral(_saverData.cdpId, ilk, _saverData.joinAddr); uint collDrawn = drawCollateral(_saverData.cdpId, _saverData.joinAddr, maxColl); // Swap _exchangeData.srcAmount = (_saverData.loanAmount + collDrawn); _exchangeData.user = user; _exchangeData.dfsFeeDivider = isAutomation() ? AUTOMATIC_SERVICE_FEE : MANUAL_SERVICE_FEE; (, uint paybackAmount) = _sell(_exchangeData); paybackAmount -= takeFee(_saverData.gasCost, paybackAmount); paybackAmount = limitLoanAmount(_saverData.cdpId, ilk, paybackAmount, user); // Payback the debt paybackDebt(_saverData.cdpId, ilk, paybackAmount, user); // Draw collateral to repay the flash loan drawCollateral(_saverData.cdpId, _saverData.joinAddr, (_saverData.loanAmount + _saverData.fee)); logger.Log(address(this), msg.sender, "MCDFlashRepay", abi.encode(_saverData.cdpId, user, _exchangeData.srcAmount, paybackAmount)); } /// @notice Handles that the amount is not bigger than cdp debt and not dust function limitLoanAmount(uint _cdpId, bytes32 _ilk, uint _paybackAmount, address _owner) internal returns (uint256) { uint debt = getAllDebt(address(vat), manager.urns(_cdpId), manager.urns(_cdpId), _ilk); if (_paybackAmount > debt) { ERC20(DAI_ADDRESS).transfer(_owner, (_paybackAmount - debt)); return debt; } uint debtLeft = debt - _paybackAmount; (,,,, uint dust) = vat.ilks(_ilk); dust = dust / 10**27; // Less than dust value if (debtLeft < dust) { uint amountOverDust = (dust - debtLeft); ERC20(DAI_ADDRESS).transfer(_owner, amountOverDust); return (_paybackAmount - amountOverDust); } return _paybackAmount; } receive() external override(FlashLoanReceiverBase, DFSExchangeCore) payable {} } contract CompoundFlashLoanTaker is CompoundSaverProxy, ProxyPermission, GasBurner { ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); address payable public constant COMPOUND_SAVER_FLASH_LOAN = 0xCeB190A35D9D4804b9CE8d0CF79239f6949BfCcB; address public constant AAVE_POOL_CORE = 0x3dfd23A6c5E8BbcFc9581d2E864a68feb6a076d3; /// @notice Repays the position with it's own fund or with FL if needed /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress, exchangeAddress] /// @param _gasCost Gas cost for specific transaction function repayWithLoan( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost ) public payable burnGas(25) { uint maxColl = getMaxCollateral(_cAddresses[0], address(this)); uint availableLiquidity = getAvailableLiquidity(_exData.srcAddr); if (_exData.srcAmount <= maxColl || availableLiquidity == 0) { repay(_exData, _cAddresses, _gasCost); } else { // 0x fee COMPOUND_SAVER_FLASH_LOAN.transfer(msg.value); uint loanAmount = (_exData.srcAmount - maxColl); if (loanAmount > availableLiquidity) loanAmount = availableLiquidity; bytes memory encoded = packExchangeData(_exData); bytes memory paramsData = abi.encode(encoded, _cAddresses, _gasCost, true, address(this)); givePermission(COMPOUND_SAVER_FLASH_LOAN); lendingPool.flashLoan(COMPOUND_SAVER_FLASH_LOAN, getUnderlyingAddr(_cAddresses[0]), loanAmount, paramsData); removePermission(COMPOUND_SAVER_FLASH_LOAN); logger.Log(address(this), msg.sender, "CompoundFlashRepay", abi.encode(loanAmount, _exData.srcAmount, _cAddresses[0])); } } /// @notice Boosts the position with it's own fund or with FL if needed /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress, exchangeAddress] /// @param _gasCost Gas cost for specific transaction function boostWithLoan( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost ) public payable burnGas(20) { uint maxBorrow = getMaxBorrow(_cAddresses[1], address(this)); uint availableLiquidity = getAvailableLiquidity(_exData.srcAddr); if (_exData.srcAmount <= maxBorrow || availableLiquidity == 0) { boost(_exData, _cAddresses, _gasCost); } else { // 0x fee COMPOUND_SAVER_FLASH_LOAN.transfer(msg.value); uint loanAmount = (_exData.srcAmount - maxBorrow); if (loanAmount > availableLiquidity) loanAmount = availableLiquidity; bytes memory paramsData = abi.encode(packExchangeData(_exData), _cAddresses, _gasCost, false, address(this)); givePermission(COMPOUND_SAVER_FLASH_LOAN); lendingPool.flashLoan(COMPOUND_SAVER_FLASH_LOAN, getUnderlyingAddr(_cAddresses[1]), loanAmount, paramsData); removePermission(COMPOUND_SAVER_FLASH_LOAN); logger.Log(address(this), msg.sender, "CompoundFlashBoost", abi.encode(loanAmount, _exData.srcAmount, _cAddresses[1])); } } function getAvailableLiquidity(address _tokenAddr) internal view returns (uint liquidity) { if (_tokenAddr == KYBER_ETH_ADDRESS) { liquidity = AAVE_POOL_CORE.balance; } else { liquidity = ERC20(_tokenAddr).balanceOf(AAVE_POOL_CORE); } } } contract CreamFlashLoanTaker is CreamSaverProxy, ProxyPermission, GasBurner { ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); address payable public constant COMPOUND_SAVER_FLASH_LOAN = 0x3ceD2067c0B057611e4E2686Dbe40028962Cc625; address public constant AAVE_POOL_CORE = 0x3dfd23A6c5E8BbcFc9581d2E864a68feb6a076d3; /// @notice Repays the position with it's own fund or with FL if needed /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress, exchangeAddress] /// @param _gasCost Gas cost for specific transaction function repayWithLoan( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost ) public payable burnGas(25) { uint maxColl = getMaxCollateral(_cAddresses[0], address(this)); uint availableLiquidity = getAvailableLiquidity(_exData.srcAddr); if (_exData.srcAmount <= maxColl || availableLiquidity == 0) { repay(_exData, _cAddresses, _gasCost); } else { // 0x fee COMPOUND_SAVER_FLASH_LOAN.transfer(msg.value); uint loanAmount = (_exData.srcAmount - maxColl); bytes memory encoded = packExchangeData(_exData); bytes memory paramsData = abi.encode(encoded, _cAddresses, _gasCost, true, address(this)); givePermission(COMPOUND_SAVER_FLASH_LOAN); lendingPool.flashLoan(COMPOUND_SAVER_FLASH_LOAN, getUnderlyingAddr(_cAddresses[0]), loanAmount, paramsData); removePermission(COMPOUND_SAVER_FLASH_LOAN); logger.Log(address(this), msg.sender, "CreamFlashRepay", abi.encode(loanAmount, _exData.srcAmount, _cAddresses[0])); } } /// @notice Boosts the position with it's own fund or with FL if needed /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress, exchangeAddress] /// @param _gasCost Gas cost for specific transaction function boostWithLoan( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost ) public payable burnGas(20) { uint maxBorrow = getMaxBorrow(_cAddresses[1], address(this)); uint availableLiquidity = getAvailableLiquidity(_exData.srcAddr); if (_exData.srcAmount <= maxBorrow || availableLiquidity == 0) { boost(_exData, _cAddresses, _gasCost); } else { // 0x fee COMPOUND_SAVER_FLASH_LOAN.transfer(msg.value); uint loanAmount = (_exData.srcAmount - maxBorrow); bytes memory paramsData = abi.encode(packExchangeData(_exData), _cAddresses, _gasCost, false, address(this)); givePermission(COMPOUND_SAVER_FLASH_LOAN); lendingPool.flashLoan(COMPOUND_SAVER_FLASH_LOAN, getUnderlyingAddr(_cAddresses[1]), loanAmount, paramsData); removePermission(COMPOUND_SAVER_FLASH_LOAN); logger.Log(address(this), msg.sender, "CreamFlashBoost", abi.encode(loanAmount, _exData.srcAmount, _cAddresses[1])); } } function getAvailableLiquidity(address _tokenAddr) internal view returns (uint liquidity) { if (_tokenAddr == KYBER_ETH_ADDRESS) { liquidity = AAVE_POOL_CORE.balance; } else { liquidity = ERC20(_tokenAddr).balanceOf(AAVE_POOL_CORE); } } }

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{"success": true, "error": null, "results": {"detectors": [{"check": "tx-origin", "impact": "Medium", "confidence": "Medium"}, {"check": "divide-before-multiply", "impact": "Medium", "confidence": "Medium"}, {"check": "name-reused", "impact": "High", "confidence": "High"}, {"check": "erc20-interface", "impact": "Medium", "confidence": "High"}, {"check": "arbitrary-send", "impact": "High", "confidence": "Medium"}, {"check": "unchecked-lowlevel", "impact": "Medium", "confidence": "Medium"}, {"check": "incorrect-equality", "impact": "Medium", "confidence": "High"}, {"check": "uninitialized-local", "impact": "Medium", "confidence": "Medium"}, {"check": "unchecked-transfer", "impact": "High", "confidence": "Medium"}, {"check": "unused-return", "impact": "Medium", "confidence": "Medium"}, {"check": "locked-ether", "impact": "Medium", "confidence": "High"}]}}

0x7dfb72a2aad08c937706f21421b15bfc34cba9ca

pragma solidity 0.4.24; contract ERC20Basic { function totalSupply() public view returns (uint256); function balanceOf(address _who) public view returns (uint256); function transfer(address _to, uint256 _value) public returns (bool); event Transfer(address indexed from, address indexed to, uint256 value); } contract Ownable { address public owner; event OwnershipRenounced(address indexed previousOwner); event OwnershipTransferred( address indexed previousOwner, address indexed newOwner ); /** * @dev The Ownable constructor sets the original `owner` of the contract to the sender * account. */ constructor() public { owner = msg.sender; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(msg.sender == owner); _; } /** * @dev Allows the current owner to relinquish control of the contract. * @notice Renouncing to ownership will leave the contract without an owner. * It will not be possible to call the functions with the `onlyOwner` * modifier anymore. */ function renounceOwnership() public onlyOwner { emit OwnershipRenounced(owner); owner = address(0); } /** * @dev Allows the current owner to transfer control of the contract to a newOwner. * @param _newOwner The address to transfer ownership to. */ function transferOwnership(address _newOwner) public onlyOwner { _transferOwnership(_newOwner); } /** * @dev Transfers control of the contract to a newOwner. * @param _newOwner The address to transfer ownership to. */ function _transferOwnership(address _newOwner) internal { require(_newOwner != address(0)); emit OwnershipTransferred(owner, _newOwner); owner = _newOwner; } } library SafeMath { /** * @dev Multiplies two numbers, throws on overflow. */ function mul(uint256 _a, uint256 _b) internal pure returns (uint256 c) { // Gas optimization: this is cheaper than asserting 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522 if (_a == 0) { return 0; } c = _a * _b; assert(c / _a == _b); return c; } /** * @dev Integer division of two numbers, truncating the quotient. */ function div(uint256 _a, uint256 _b) internal pure returns (uint256) { // assert(_b > 0); // Solidity automatically throws when dividing by 0 // uint256 c = _a / _b; // assert(_a == _b * c + _a % _b); // There is no case in which this doesn't hold return _a / _b; } /** * @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend). */ function sub(uint256 _a, uint256 _b) internal pure returns (uint256) { assert(_b <= _a); return _a - _b; } /** * @dev Adds two numbers, throws on overflow. */ function add(uint256 _a, uint256 _b) internal pure returns (uint256 c) { c = _a + _b; assert(c >= _a); return c; } } contract BasicToken is ERC20Basic { using SafeMath for uint256; mapping(address => uint256) internal balances; uint256 internal totalSupply_; /** * @dev Total number of tokens in existence */ function totalSupply() public view returns (uint256) { return totalSupply_; } /** * @dev Transfer token for a specified address * @param _to The address to transfer to. * @param _value The amount to be transferred. */ function transfer(address _to, uint256 _value) public returns (bool) { require(_value <= balances[msg.sender]); require(_to != address(0)); balances[msg.sender] = balances[msg.sender].sub(_value); balances[_to] = balances[_to].add(_value); emit Transfer(msg.sender, _to, _value); return true; } /** * @dev Gets the balance of the specified address. * @param _owner The address to query the the balance of. * @return An uint256 representing the amount owned by the passed address. */ function balanceOf(address _owner) public view returns (uint256) { return balances[_owner]; } } contract ERC20 is ERC20Basic { function allowance(address _owner, address _spender) public view returns (uint256); function transferFrom(address _from, address _to, uint256 _value) public returns (bool); function approve(address _spender, uint256 _value) public returns (bool); event Approval( address indexed owner, address indexed spender, uint256 value ); } contract StandardToken is ERC20, BasicToken { mapping (address => mapping (address => uint256)) internal allowed; /** * @dev Transfer tokens from one address to another * @param _from address The address which you want to send tokens from * @param _to address The address which you want to transfer to * @param _value uint256 the amount of tokens to be transferred */ function transferFrom( address _from, address _to, uint256 _value ) public returns (bool) { require(_value <= balances[_from]); require(_value <= allowed[_from][msg.sender]); require(_to != address(0)); balances[_from] = balances[_from].sub(_value); balances[_to] = balances[_to].add(_value); allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value); emit Transfer(_from, _to, _value); return true; } /** * @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender. * Beware that changing an allowance with this method brings the risk that someone may use both the old * and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this * race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * @param _spender The address which will spend the funds. * @param _value The amount of tokens to be spent. */ function approve(address _spender, uint256 _value) public returns (bool) { allowed[msg.sender][_spender] = _value; emit Approval(msg.sender, _spender, _value); return true; } /** * @dev Function to check the amount of tokens that an owner allowed to a spender. * @param _owner address The address which owns the funds. * @param _spender address The address which will spend the funds. * @return A uint256 specifying the amount of tokens still available for the spender. */ function allowance( address _owner, address _spender ) public view returns (uint256) { return allowed[_owner][_spender]; } /** * @dev Increase the amount of tokens that an owner allowed to a spender. * approve should be called when allowed[_spender] == 0. To increment * allowed value is better to use this function to avoid 2 calls (and wait until * the first transaction is mined) * From MonolithDAO Token.sol * @param _spender The address which will spend the funds. * @param _addedValue The amount of tokens to increase the allowance by. */ function increaseApproval( address _spender, uint256 _addedValue ) public returns (bool) { allowed[msg.sender][_spender] = ( allowed[msg.sender][_spender].add(_addedValue)); emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]); return true; } /** * @dev Decrease the amount of tokens that an owner allowed to a spender. * approve should be called when allowed[_spender] == 0. To decrement * allowed value is better to use this function to avoid 2 calls (and wait until * the first transaction is mined) * From MonolithDAO Token.sol * @param _spender The address which will spend the funds. * @param _subtractedValue The amount of tokens to decrease the allowance by. */ function decreaseApproval( address _spender, uint256 _subtractedValue ) public returns (bool) { uint256 oldValue = allowed[msg.sender][_spender]; if (_subtractedValue >= oldValue) { allowed[msg.sender][_spender] = 0; } else { allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue); } emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]); return true; } } contract MintableToken is StandardToken, Ownable { event Mint(address indexed to, uint256 amount); event MintFinished(); bool public mintingFinished = false; modifier canMint() { require(!mintingFinished); _; } modifier hasMintPermission() { require(msg.sender == owner); _; } /** * @dev Function to mint tokens * @param _to The address that will receive the minted tokens. * @param _amount The amount of tokens to mint. * @return A boolean that indicates if the operation was successful. */ function mint( address _to, uint256 _amount ) public hasMintPermission canMint returns (bool) { totalSupply_ = totalSupply_.add(_amount); balances[_to] = balances[_to].add(_amount); emit Mint(_to, _amount); emit Transfer(address(0), _to, _amount); return true; } /** * @dev Function to stop minting new tokens. * @return True if the operation was successful. */ function finishMinting() public onlyOwner canMint returns (bool) { mintingFinished = true; emit MintFinished(); return true; } } contract CappedToken is MintableToken { uint256 public cap; constructor(uint256 _cap) public { require(_cap > 0); cap = _cap; } /** * @dev Function to mint tokens * @param _to The address that will receive the minted tokens. * @param _amount The amount of tokens to mint. * @return A boolean that indicates if the operation was successful. */ function mint( address _to, uint256 _amount ) public returns (bool) { require(totalSupply_.add(_amount) <= cap); return super.mint(_to, _amount); } } contract MulanFinance is CappedToken { string public name = "Mulan.Finance"; string public symbol = "$MULAN"; uint8 public decimals = 18; constructor( uint256 _cap ) public CappedToken( _cap ) { } }

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0x7e0618c8dec8447122aeae299001cd796fc00672

pragma solidity 0.6.12; abstract contract Context { function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } contract ERC20 is Context, IERC20 { using SafeMath for uint256; mapping (address => uint256) private _balances; mapping (address => mapping (address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; uint8 private _decimals; /** * @dev Sets the values for {name} and {symbol}, initializes {decimals} with * a default value of 18. * * To select a different value for {decimals}, use {_setupDecimals}. * * All three of these values are immutable: they can only be set once during * construction. */ constructor (string memory name, string memory symbol) public { _name = name; _symbol = symbol; _decimals = 18; } /** * @dev Returns the name of the token. */ function name() public view returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5,05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is * called. * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view returns (uint8) { return _decimals; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `recipient` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address recipient, uint256 amount) public virtual override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { _approve(_msgSender(), spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}. * * Requirements: * * - `sender` and `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. * - the caller must have allowance for ``sender``'s tokens of at least * `amount`. */ function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) { _transfer(sender, recipient, amount); _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance")); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue)); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero")); return true; } /** * @dev Moves tokens `amount` from `sender` to `recipient`. * * This is internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `sender` cannot be the zero address. * - `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. */ function _transfer(address sender, address recipient, uint256 amount) internal virtual { require(sender != address(0), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(sender, recipient, amount); _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance"); _balances[recipient] = _balances[recipient].add(amount); emit Transfer(sender, recipient, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements: * * - `to` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply = _totalSupply.add(amount); _balances[account] = _balances[account].add(amount); emit Transfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance"); _totalSupply = _totalSupply.sub(amount); emit Transfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens. * * This internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve(address owner, address spender, uint256 amount) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Sets {decimals} to a value other than the default one of 18. * * WARNING: This function should only be called from the constructor. Most * applications that interact with token contracts will not expect * {decimals} to ever change, and may work incorrectly if it does. */ function _setupDecimals(uint8 decimals_) internal { _decimals = decimals_; } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be to transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { } } contract Token is ERC20 { constructor () public ERC20("BTS Fans", "BTSF") { _mint(msg.sender, 3500000 * (10 ** uint256(decimals()))); } }

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0x7ef00263bf541b141a34c9eb8a2095c20b1ff920

pragma solidity 0.6.12; pragma experimental ABIEncoderV2; interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } contract sbCommunity { event NewPendingAdmin(address oldPendingAdmin, address newPendingAdmin); event NewAdmin(address oldAdmin, address newAdmin); event MinerRewardsPercentageUpdated(uint256 percentage); event RewardsReceived(uint256 indexed day, uint256 amount); event ETHMined(address indexed miner, uint256 amount, uint256 indexed day); event ETHUnmined(address indexed miner, uint256 amount, uint256 indexed day); event ERC20Mined(address indexed miner, address indexed token, uint256 amount, uint256 indexed day); event ERC20Unmined(address indexed miner, address indexed token, uint256 amount, uint256 indexed day); event Claimed(address indexed miner, uint256 amount, uint256 indexed day); event ServiceAdded(address indexed service, string tag); event TagAddedForService(address indexed service, string tag); using SafeMath for uint256; bool internal initDone; address internal constant ETH = address(0); string internal name; uint256 internal minerRewardPercentage; IERC20 internal strongToken; sbTokensInterface internal sbTokens; sbControllerInterface internal sbController; sbStrongPoolInterface internal sbStrongPool; sbVotesInterface internal sbVotes; address internal sbTimelock; address internal admin; address internal pendingAdmin; mapping(address => mapping(address => uint256[])) internal minerTokenDays; mapping(address => mapping(address => uint256[])) internal minerTokenAmounts; mapping(address => mapping(address => uint256[])) internal minerTokenMineSeconds; mapping(address => uint256[]) internal tokenDays; mapping(address => uint256[]) internal tokenAmounts; mapping(address => uint256[]) internal tokenMineSeconds; mapping(address => uint256) internal minerDayLastClaimedFor; mapping(uint256 => uint256) internal dayServiceRewards; address[] internal services; mapping(address => string[]) internal serviceTags; function init( address adminAddress, address sbControllerAddress, address strongTokenAddress, address sbTokensAddress, address sbStrongPoolAddress, address sbVotesAddress, address sbTimelockAddress, uint256 minerRewardPercent, string memory communityName ) public { require(!initDone, 'init done'); strongToken = IERC20(strongTokenAddress); sbTokens = sbTokensInterface(sbTokensAddress); sbController = sbControllerInterface(sbControllerAddress); sbStrongPool = sbStrongPoolInterface(sbStrongPoolAddress); sbVotes = sbVotesInterface(sbVotesAddress); sbTimelock = sbTimelockAddress; minerRewardPercentage = minerRewardPercent; name = communityName; admin = adminAddress; initDone = true; } function updateMinerRewardPercentage(uint256 percentage) external { require(msg.sender == sbTimelock, 'not sbTimelock'); require(percentage <= 100, 'greater than 100'); minerRewardPercentage = percentage; emit MinerRewardsPercentageUpdated(percentage); } function getTokenData(address token, uint256 day) external view returns ( uint256, uint256, uint256 ) { require(sbTokens.tokenAccepted(token), 'invalid token'); require(day <= _getCurrentDay(), 'invalid day'); return _getTokenData(token, day); } function serviceAccepted(address service) external view returns (bool) { return _serviceExists(service); } function receiveRewards(uint256 day, uint256 amount) external { require(amount > 0, 'zero'); require(msg.sender == address(sbController), 'not sbController'); strongToken.transferFrom(address(sbController), address(this), amount); uint256 oneHundred = 100; uint256 serviceReward = oneHundred.sub(minerRewardPercentage).mul(amount).div(oneHundred); (, , uint256 communityVoteSeconds) = sbVotes.getCommunityData(address(this), day); if (communityVoteSeconds != 0 && serviceReward != 0) { dayServiceRewards[day] = serviceReward; strongToken.approve(address(sbVotes), serviceReward); sbVotes.receiveServiceRewards(day, serviceReward); } emit RewardsReceived(day, amount.sub(serviceReward)); } function getMinerRewardPercentage() external view returns (uint256) { return minerRewardPercentage; } function addService(address service, string memory tag) public { require(msg.sender == admin, 'not admin'); require( sbStrongPool.serviceMinMined(service), 'not min mined' ); require(service != address(0), 'service not zero address'); require(!_serviceExists(service), 'service exists'); services.push(service); serviceTags[service].push(tag); emit ServiceAdded(service, tag); } function getServices() public view returns (address[] memory) { return services; } function getServiceTags(address service) public view returns (string[] memory) { require(_serviceExists(service), 'invalid service'); return serviceTags[service]; } function addTag(address service, string memory tag) public { require(msg.sender == admin, 'not admin'); require(_serviceExists(service), 'invalid service'); require(!_serviceTagExists(service, tag), 'tag exists'); serviceTags[service].push(tag); emit TagAddedForService(service, tag); } function setPendingAdmin(address newPendingAdmin) public { require(msg.sender == admin, 'not admin'); address oldPendingAdmin = pendingAdmin; pendingAdmin = newPendingAdmin; emit NewPendingAdmin(oldPendingAdmin, newPendingAdmin); } function acceptAdmin() public { require( msg.sender == pendingAdmin && msg.sender != address(0), 'not pendingAdmin' ); address oldAdmin = admin; address oldPendingAdmin = pendingAdmin; admin = pendingAdmin; pendingAdmin = address(0); emit NewAdmin(oldAdmin, admin); emit NewPendingAdmin(oldPendingAdmin, pendingAdmin); } function getAdminAddressUsed() public view returns (address) { return admin; } function getPendingAdminAddressUsed() public view returns (address) { return pendingAdmin; } function getSbControllerAddressUsed() public view returns (address) { return address(sbController); } function getStrongAddressUsed() public view returns (address) { return address(strongToken); } function getSbTokensAddressUsed() public view returns (address) { return address(sbTokens); } function getSbStrongPoolAddressUsed() public view returns (address) { return address(sbStrongPool); } function getSbVotesAddressUsed() public view returns (address) { return address(sbVotes); } function getSbTimelockAddressUsed() public view returns (address) { return sbTimelock; } function getDayServiceRewards(uint256 day) public view returns (uint256) { return dayServiceRewards[day]; } function getName() public view returns (string memory) { return name; } function getCurrentDay() public view returns (uint256) { return _getCurrentDay(); } function mineETH() public payable { require(msg.value > 0, 'zero'); require(sbTokens.tokenAccepted(ETH), 'invalid token'); uint256 currentDay = _getCurrentDay(); uint256 startDay = sbController.getStartDay(); uint256 MAX_YEARS = sbController.getMaxYears(); uint256 year = _getYearDayIsIn(currentDay, startDay); require(year <= MAX_YEARS, 'invalid year'); require(sbStrongPool.minerMinMined(msg.sender), 'not min mined'); _updateMinerTokenData(msg.sender, ETH, msg.value, true, currentDay); _updateTokenData(ETH, msg.value, true, currentDay); emit ETHMined(msg.sender, msg.value, currentDay); } function mineERC20(address token, uint256 amount) public { require(amount > 0, 'zero'); require(token != ETH, 'no mine ETH'); require(sbTokens.tokenAccepted(token), 'invalid token'); IERC20(token).transferFrom(msg.sender, address(this), amount); uint256 currentDay = _getCurrentDay(); uint256 startDay = sbController.getStartDay(); uint256 MAX_YEARS = sbController.getMaxYears(); uint256 year = _getYearDayIsIn(currentDay, startDay); require(year <= MAX_YEARS, 'invalid year'); require(sbStrongPool.minerMinMined(msg.sender), 'not min mined'); _updateMinerTokenData(msg.sender, token, amount, true, currentDay); _updateTokenData(token, amount, true, currentDay); emit ERC20Mined(msg.sender, token, amount, currentDay); } function unmine(address token, uint256 amount) public { require(amount > 0, 'zero'); require(sbTokens.tokenAccepted(token), 'invalid token'); uint256 currentDay = _getCurrentDay(); _updateMinerTokenData(msg.sender, token, amount, false, currentDay); _updateTokenData(token, amount, false, currentDay); if (token == ETH) { msg.sender.transfer(amount); emit ETHUnmined(msg.sender, amount, currentDay); } else { IERC20(token).transfer(msg.sender, amount); emit ERC20Unmined(msg.sender, token, amount, currentDay); } } function claimAll() public { uint256 currentDay = _getCurrentDay(); uint256 dayLastClaimedFor = minerDayLastClaimedFor[msg.sender] == 0 ? sbController.getStartDay().sub(1) : minerDayLastClaimedFor[msg.sender]; require(currentDay > dayLastClaimedFor.add(1), 'already claimed'); require(sbTokens.upToDate(), 'need token prices'); require(sbController.upToDate(), 'need rewards released'); _claim(currentDay, msg.sender, dayLastClaimedFor); } function claimUpTo(uint256 day) public { require(day <= _getCurrentDay(), 'invalid day'); uint256 dayLastClaimedFor = minerDayLastClaimedFor[msg.sender] == 0 ? sbController.getStartDay().sub(1) : minerDayLastClaimedFor[msg.sender]; require(day > dayLastClaimedFor.add(1), 'already claimed'); require(sbTokens.upToDate(), 'need token prices'); require(sbController.upToDate(), 'need rewards released'); _claim(day, msg.sender, dayLastClaimedFor); } function getRewardsDueAll(address miner) public view returns (uint256) { uint256 currentDay = _getCurrentDay(); uint256 dayLastClaimedFor = minerDayLastClaimedFor[miner] == 0 ? sbController.getStartDay().sub(1) : minerDayLastClaimedFor[miner]; if (!(currentDay > dayLastClaimedFor.add(1))) { return 0; } require(sbTokens.upToDate(), 'need token prices'); require(sbController.upToDate(), 'need rewards released'); return _getRewardsDue(currentDay, miner, dayLastClaimedFor); } function getRewardsDueUpTo(uint256 day, address miner) public view returns (uint256) { require(day <= _getCurrentDay(), 'invalid day'); uint256 dayLastClaimedFor = minerDayLastClaimedFor[miner] == 0 ? sbController.getStartDay().sub(1) : minerDayLastClaimedFor[miner]; if (!(day > dayLastClaimedFor.add(1))) { return 0; } require(sbTokens.upToDate(), 'need token prices'); require(sbController.upToDate(), 'need rewards released'); return _getRewardsDue(day, miner, dayLastClaimedFor); } function getMinerDayLastClaimedFor(address miner) public view returns (uint256) { return minerDayLastClaimedFor[miner] == 0 ? sbController.getStartDay().sub(1) : minerDayLastClaimedFor[miner]; } function getMinerTokenData( address miner, address token, uint256 day ) public view returns ( uint256, uint256, uint256 ) { require(sbTokens.tokenAccepted(token), 'invalid token'); require(day <= _getCurrentDay(), 'invalid day'); return _getMinerTokenData(miner, token, day); } function _getMinerTokenData( address miner, address token, uint256 day ) public view returns ( uint256, uint256, uint256 ) { uint256[] memory _Days = minerTokenDays[miner][token]; uint256[] memory _Amounts = minerTokenAmounts[miner][token]; uint256[] memory _UnitSeconds = minerTokenMineSeconds[miner][token]; return _get(_Days, _Amounts, _UnitSeconds, day); } function _getTokenData(address token, uint256 day) internal view returns ( uint256, uint256, uint256 ) { uint256[] memory _Days = tokenDays[token]; uint256[] memory _Amounts = tokenAmounts[token]; uint256[] memory _UnitSeconds = tokenMineSeconds[token]; return _get(_Days, _Amounts, _UnitSeconds, day); } function _updateMinerTokenData( address miner, address token, uint256 amount, bool adding, uint256 currentDay ) internal { uint256[] storage _Days = minerTokenDays[miner][token]; uint256[] storage _Amounts = minerTokenAmounts[miner][token]; uint256[] storage _UnitSeconds = minerTokenMineSeconds[miner][token]; _update(_Days, _Amounts, _UnitSeconds, amount, adding, currentDay); } function _updateTokenData( address token, uint256 amount, bool adding, uint256 currentDay ) internal { uint256[] storage _Days = tokenDays[token]; uint256[] storage _Amounts = tokenAmounts[token]; uint256[] storage _UnitSeconds = tokenMineSeconds[token]; _update(_Days, _Amounts, _UnitSeconds, amount, adding, currentDay); } function _get( uint256[] memory _Days, uint256[] memory _Amounts, uint256[] memory _UnitSeconds, uint256 day ) internal pure returns ( uint256, uint256, uint256 ) { uint256 len = _Days.length; if (len == 0) { return (day, 0, 0); } if (day < _Days[0]) { return (day, 0, 0); } uint256 lastIndex = len.sub(1); uint256 lastMinedDay = _Days[lastIndex]; if (day == lastMinedDay) { return (day, _Amounts[lastIndex], _UnitSeconds[lastIndex]); } else if (day > lastMinedDay) { return (day, _Amounts[lastIndex], _Amounts[lastIndex].mul(1 days)); } return _find(_Days, _Amounts, _UnitSeconds, day); } function _find( uint256[] memory _Days, uint256[] memory _Amounts, uint256[] memory _UnitSeconds, uint256 day ) internal pure returns ( uint256, uint256, uint256 ) { uint256 left = 0; uint256 right = _Days.length.sub(1); uint256 middle = right.add(left).div(2); while (left < right) { if (_Days[middle] == day) { return (day, _Amounts[middle], _UnitSeconds[middle]); } else if (_Days[middle] > day) { if (middle > 0 && _Days[middle.sub(1)] < day) { return (day, _Amounts[middle.sub(1)], _Amounts[middle.sub(1)].mul(1 days)); } if (middle == 0) { return (day, 0, 0); } right = middle.sub(1); } else if (_Days[middle] < day) { if (middle < _Days.length.sub(1) && _Days[middle.add(1)] > day) { return (day, _Amounts[middle], _Amounts[middle].mul(1 days)); } left = middle.add(1); } middle = right.add(left).div(2); } if (_Days[middle] != day) { return (day, 0, 0); } else { return (day, _Amounts[middle], _UnitSeconds[middle]); } } function _update( uint256[] storage _Days, uint256[] storage _Amounts, uint256[] storage _UnitSeconds, uint256 amount, bool adding, uint256 currentDay ) internal { uint256 len = _Days.length; uint256 secondsInADay = 1 days; uint256 secondsSinceStartOfDay = block.timestamp % secondsInADay; uint256 secondsUntilEndOfDay = secondsInADay.sub(secondsSinceStartOfDay); if (len == 0) { if (adding) { _Days.push(currentDay); _Amounts.push(amount); _UnitSeconds.push(amount.mul(secondsUntilEndOfDay)); } else { require(false, '1: not enough mine'); } } else { uint256 lastIndex = len.sub(1); uint256 lastMinedDay = _Days[lastIndex]; uint256 lastMinedAmount = _Amounts[lastIndex]; uint256 lastUnitSeconds = _UnitSeconds[lastIndex]; uint256 newAmount; uint256 newUnitSeconds; if (lastMinedDay == currentDay) { if (adding) { newAmount = lastMinedAmount.add(amount); newUnitSeconds = lastUnitSeconds.add(amount.mul(secondsUntilEndOfDay)); } else { require(lastMinedAmount >= amount, '2: not enough mine'); newAmount = lastMinedAmount.sub(amount); newUnitSeconds = lastUnitSeconds.sub(amount.mul(secondsUntilEndOfDay)); } _Amounts[lastIndex] = newAmount; _UnitSeconds[lastIndex] = newUnitSeconds; } else { if (adding) { newAmount = lastMinedAmount.add(amount); newUnitSeconds = lastMinedAmount.mul(1 days).add(amount.mul(secondsUntilEndOfDay)); } else { require(lastMinedAmount >= amount, '3: not enough mine'); newAmount = lastMinedAmount.sub(amount); newUnitSeconds = lastMinedAmount.mul(1 days).sub(amount.mul(secondsUntilEndOfDay)); } _Days.push(currentDay); _Amounts.push(newAmount); _UnitSeconds.push(newUnitSeconds); } } } function _claim( uint256 upToDay, address miner, uint256 dayLastClaimedFor ) internal { uint256 rewards = _getRewardsDue(upToDay, miner, dayLastClaimedFor); require(rewards > 0, 'no rewards'); minerDayLastClaimedFor[miner] = upToDay.sub(1); strongToken.approve(address(sbStrongPool), rewards); sbStrongPool.mineFor(miner, rewards); emit Claimed(miner, rewards, _getCurrentDay()); } function _getRewardsDue( uint256 upToDay, address miner, uint256 dayLastClaimedFor ) internal view returns (uint256) { address[] memory tokens = sbTokens.getTokens(); uint256 rewards; for (uint256 day = dayLastClaimedFor.add(1); day <= upToDay.sub(1); day++) { uint256 communityDayMineSecondsUSD = sbController.getCommunityDayMineSecondsUSD(address(this), day); if (communityDayMineSecondsUSD == 0) { continue; } uint256 minerDayMineSecondsUSD = 0; uint256[] memory tokenPrices = sbTokens.getTokenPrices(day); for (uint256 i = 0; i < tokens.length; i++) { address token = tokens[i]; (, , uint256 minerMineSeconds) = _getMinerTokenData(miner, token, day); uint256 amount = minerMineSeconds.mul(tokenPrices[i]).div(1e18); minerDayMineSecondsUSD = minerDayMineSecondsUSD.add(amount); } uint256 communityDayRewards = sbController.getCommunityDayRewards(address(this), day).sub(dayServiceRewards[day]); uint256 amount = communityDayRewards.mul(minerDayMineSecondsUSD).div(communityDayMineSecondsUSD); rewards = rewards.add(amount); } return rewards; } function _serviceExists(address service) internal view returns (bool) { return serviceTags[service].length > 0; } function _serviceTagExists(address service, string memory tag) internal view returns (bool) { for (uint256 i = 0; i < serviceTags[service].length; i++) { if (keccak256(abi.encode(tag)) == keccak256(abi.encode(serviceTags[service][i]))) { return true; } } return false; } function _getYearDayIsIn(uint256 day, uint256 startDay) internal pure returns (uint256) { return day.sub(startDay).div(366).add(1); // dividing by 366 makes day 1 and 365 be in year 1 } function _getCurrentDay() internal view returns (uint256) { return block.timestamp.div(1 days).add(1); } } interface sbControllerInterface { function getDayMineSecondsUSDTotal(uint256 day) external view returns (uint256); function getCommunityDayMineSecondsUSD(address community, uint256 day) external view returns (uint256); function getCommunityDayRewards(address community, uint256 day) external view returns (uint256); function getStartDay() external view returns (uint256); function getMaxYears() external view returns (uint256); function getStrongPoolDailyRewards(uint256 day) external view returns (uint256); function communityAccepted(address community) external view returns (bool); function getCommunities() external view returns (address[] memory); function upToDate() external view returns (bool); } interface sbStrongPoolInterface { function serviceMinMined(address miner) external view returns (bool); function minerMinMined(address miner) external view returns (bool); function mineFor(address miner, uint256 amount) external; function getMineData(uint256 day) external view returns ( uint256, uint256, uint256 ); function receiveRewards(uint256 day, uint256 amount) external; } interface sbTokensInterface { function getTokens() external view returns (address[] memory); function getTokenPrices(uint256 day) external view returns (uint256[] memory); function tokenAccepted(address token) external view returns (bool); function upToDate() external view returns (bool); function getTokenPrice(address token, uint256 day) external view returns (uint256); } interface sbVotesInterface { function getCommunityData(address community, uint256 day) external view returns ( uint256, uint256, uint256 ); function getPriorProposalVotes(address account, uint256 blockNumber) external view returns (uint96); function receiveServiceRewards(uint256 day, uint256 amount) external; function receiveVoterRewards(uint256 day, uint256 amount) external; function updateVotes( address staker, uint256 rawAmount, bool adding ) external; }

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{"success": true, "error": null, "results": {"detectors": [{"check": "uninitialized-state", "impact": "High", "confidence": "High"}, {"check": "unchecked-transfer", "impact": "High", "confidence": "Medium"}, {"check": "incorrect-equality", "impact": "Medium", "confidence": "High"}, {"check": "weak-prng", "impact": "High", "confidence": "Medium"}, {"check": "unused-return", "impact": "Medium", "confidence": "Medium"}]}}

0x7f9a61682e1aa0e45b3dd95860c17a1640d37c14

pragma solidity 0.5.17; pragma experimental ABIEncoderV2; interface PotLike { function chi() external view returns (uint); function pie(address) external view returns (uint); function drip() external returns (uint); function join(uint) external; function exit(uint) external; } interface GemLike { function approve(address, uint) external; function balanceOf(address) external view returns (uint); function transferFrom(address, address, uint) external returns (bool); } interface VatLike { function dai(address) external view returns (uint); function hope(address) external; } interface DaiJoinLike { function vat() external returns (VatLike); function dai() external returns (GemLike); function join(address, uint) external payable; function exit(address, uint) external; } contract CTokenStorage { /** * @dev Guard variable for re-entrancy checks */ bool internal _notEntered; /** * @notice EIP-20 token name for this token */ string public name; /** * @notice EIP-20 token symbol for this token */ string public symbol; /** * @notice EIP-20 token decimals for this token */ uint8 public decimals; /** * @notice Maximum borrow rate that can ever be applied (.0005% / block) */ uint internal constant borrowRateMaxMantissa = 0.0005e16; /** * @notice Maximum fraction of interest that can be set aside for reserves */ uint internal constant reserveFactorMaxMantissa = 1e18; /** * @notice Administrator for this contract */ address payable public admin; /** * @notice Pending administrator for this contract */ address payable public pendingAdmin; /** * @notice Contract which oversees inter-cToken operations */ ComptrollerInterface public comptroller; /** * @notice Model which tells what the current interest rate should be */ InterestRateModel public interestRateModel; /** * @notice Initial exchange rate used when minting the first CTokens (used when totalSupply = 0) */ uint internal initialExchangeRateMantissa; /** * @notice Fraction of interest currently set aside for reserves */ uint public reserveFactorMantissa; /** * @notice Block number that interest was last accrued at */ uint public accrualBlockNumber; /** * @notice Accumulator of the total earned interest rate since the opening of the market */ uint public borrowIndex; /** * @notice Total amount of outstanding borrows of the underlying in this market */ uint public totalBorrows; /** * @notice Total amount of reserves of the underlying held in this market */ uint public totalReserves; /** * @notice Total number of tokens in circulation */ uint public totalSupply; /** * @notice Official record of token balances for each account */ mapping (address => uint) internal accountTokens; /** * @notice Approved token transfer amounts on behalf of others */ mapping (address => mapping (address => uint)) internal transferAllowances; /** * @notice Container for borrow balance information * @member principal Total balance (with accrued interest), after applying the most recent balance-changing action * @member interestIndex Global borrowIndex as of the most recent balance-changing action */ struct BorrowSnapshot { uint principal; uint interestIndex; } /** * @notice Mapping of account addresses to outstanding borrow balances */ mapping(address => BorrowSnapshot) internal accountBorrows; } contract CTokenInterface is CTokenStorage { /** * @notice Indicator that this is a CToken contract (for inspection) */ bool public constant isCToken = true; /*** Market Events ***/ /** * @notice Event emitted when interest is accrued */ event AccrueInterest(uint cashPrior, uint interestAccumulated, uint borrowIndex, uint totalBorrows); /** * @notice Event emitted when tokens are minted */ event Mint(address minter, uint mintAmount, uint mintTokens); /** * @notice Event emitted when tokens are redeemed */ event Redeem(address redeemer, uint redeemAmount, uint redeemTokens); /** * @notice Event emitted when underlying is borrowed */ event Borrow(address borrower, uint borrowAmount, uint accountBorrows, uint totalBorrows); /** * @notice Event emitted when a borrow is repaid */ event RepayBorrow(address payer, address borrower, uint repayAmount, uint accountBorrows, uint totalBorrows); /** * @notice Event emitted when a borrow is liquidated */ event LiquidateBorrow(address liquidator, address borrower, uint repayAmount, address cTokenCollateral, uint seizeTokens); /*** Admin Events ***/ /** * @notice Event emitted when pendingAdmin is changed */ event NewPendingAdmin(address oldPendingAdmin, address newPendingAdmin); /** * @notice Event emitted when pendingAdmin is accepted, which means admin is updated */ event NewAdmin(address oldAdmin, address newAdmin); /** * @notice Event emitted when comptroller is changed */ event NewComptroller(ComptrollerInterface oldComptroller, ComptrollerInterface newComptroller); /** * @notice Event emitted when interestRateModel is changed */ event NewMarketInterestRateModel(InterestRateModel oldInterestRateModel, InterestRateModel newInterestRateModel); /** * @notice Event emitted when the reserve factor is changed */ event NewReserveFactor(uint oldReserveFactorMantissa, uint newReserveFactorMantissa); /** * @notice Event emitted when the reserves are added */ event ReservesAdded(address benefactor, uint addAmount, uint newTotalReserves); /** * @notice Event emitted when the reserves are reduced */ event ReservesReduced(address admin, uint reduceAmount, uint newTotalReserves); /** * @notice EIP20 Transfer event */ event Transfer(address indexed from, address indexed to, uint amount); /** * @notice EIP20 Approval event */ event Approval(address indexed owner, address indexed spender, uint amount); /** * @notice Failure event */ event Failure(uint error, uint info, uint detail); /*** User Interface ***/ function transfer(address dst, uint amount) external returns (bool); function transferFrom(address src, address dst, uint amount) external returns (bool); function approve(address spender, uint amount) external returns (bool); function allowance(address owner, address spender) external view returns (uint); function balanceOf(address owner) external view returns (uint); function balanceOfUnderlying(address owner) external returns (uint); function getAccountSnapshot(address account) external view returns (uint, uint, uint, uint); function borrowRatePerBlock() external view returns (uint); function supplyRatePerBlock() external view returns (uint); function totalBorrowsCurrent() external returns (uint); function borrowBalanceCurrent(address account) external returns (uint); function borrowBalanceStored(address account) public view returns (uint); function exchangeRateCurrent() public returns (uint); function exchangeRateStored() public view returns (uint); function getCash() external view returns (uint); function accrueInterest() public returns (uint); function seize(address liquidator, address borrower, uint seizeTokens) external returns (uint); /*** Admin Functions ***/ function _setPendingAdmin(address payable newPendingAdmin) external returns (uint); function _acceptAdmin() external returns (uint); function _setComptroller(ComptrollerInterface newComptroller) public returns (uint); function _setReserveFactor(uint newReserveFactorMantissa) external returns (uint); function _reduceReserves(uint reduceAmount) external returns (uint); function _setInterestRateModel(InterestRateModel newInterestRateModel) public returns (uint); } contract CErc20Storage { /** * @notice Underlying asset for this CToken */ address public underlying; } contract CErc20Interface is CErc20Storage { /*** User Interface ***/ function mint(uint mintAmount) external returns (uint); function redeem(uint redeemTokens) external returns (uint); function redeemUnderlying(uint redeemAmount) external returns (uint); function borrow(uint borrowAmount) external returns (uint); function repayBorrow(uint repayAmount) external returns (uint); function repayBorrowBehalf(address borrower, uint repayAmount) external returns (uint); function liquidateBorrow(address borrower, uint repayAmount, CTokenInterface cTokenCollateral) external returns (uint); /*** Admin Functions ***/ function _addReserves(uint addAmount) external returns (uint); } contract CDelegationStorage { /** * @notice Implementation address for this contract */ address public implementation; } contract CDelegatorInterface is CDelegationStorage { /** * @notice Emitted when implementation is changed */ event NewImplementation(address oldImplementation, address newImplementation); /** * @notice Called by the admin to update the implementation of the delegator * @param implementation_ The address of the new implementation for delegation * @param allowResign Flag to indicate whether to call _resignImplementation on the old implementation * @param becomeImplementationData The encoded bytes data to be passed to _becomeImplementation */ function _setImplementation(address implementation_, bool allowResign, bytes memory becomeImplementationData) public; } contract CDelegateInterface is CDelegationStorage { /** * @notice Called by the delegator on a delegate to initialize it for duty * @dev Should revert if any issues arise which make it unfit for delegation * @param data The encoded bytes data for any initialization */ function _becomeImplementation(bytes memory data) public; /** * @notice Called by the delegator on a delegate to forfeit its responsibility */ function _resignImplementation() public; } contract CarefulMath { /** * @dev Possible error codes that we can return */ enum MathError { NO_ERROR, DIVISION_BY_ZERO, INTEGER_OVERFLOW, INTEGER_UNDERFLOW } /** * @dev Multiplies two numbers, returns an error on overflow. */ function mulUInt(uint a, uint b) internal pure returns (MathError, uint) { if (a == 0) { return (MathError.NO_ERROR, 0); } uint c = a * b; if (c / a != b) { return (MathError.INTEGER_OVERFLOW, 0); } else { return (MathError.NO_ERROR, c); } } /** * @dev Integer division of two numbers, truncating the quotient. */ function divUInt(uint a, uint b) internal pure returns (MathError, uint) { if (b == 0) { return (MathError.DIVISION_BY_ZERO, 0); } return (MathError.NO_ERROR, a / b); } /** * @dev Subtracts two numbers, returns an error on overflow (i.e. if subtrahend is greater than minuend). */ function subUInt(uint a, uint b) internal pure returns (MathError, uint) { if (b <= a) { return (MathError.NO_ERROR, a - b); } else { return (MathError.INTEGER_UNDERFLOW, 0); } } /** * @dev Adds two numbers, returns an error on overflow. */ function addUInt(uint a, uint b) internal pure returns (MathError, uint) { uint c = a + b; if (c >= a) { return (MathError.NO_ERROR, c); } else { return (MathError.INTEGER_OVERFLOW, 0); } } /** * @dev add a and b and then subtract c */ function addThenSubUInt(uint a, uint b, uint c) internal pure returns (MathError, uint) { (MathError err0, uint sum) = addUInt(a, b); if (err0 != MathError.NO_ERROR) { return (err0, 0); } return subUInt(sum, c); } } contract Cheese { /// @notice EIP-20 token name for this token string public constant name = "Cheese"; /// @notice EIP-20 token symbol for this token string public constant symbol = "CHSTEST"; /// @notice EIP-20 token decimals for this token uint8 public constant decimals = 18; /// @notice Total number of tokens in circulation uint public constant totalSupply = 10000000e18; // 10 million Comp /// @notice Allowance amounts on behalf of others mapping (address => mapping (address => uint96)) internal allowances; /// @notice Official record of token balances for each account mapping (address => uint96) internal balances; /// @notice A record of each accounts delegate mapping (address => address) public delegates; /// @notice A checkpoint for marking number of votes from a given block struct Checkpoint { uint32 fromBlock; uint96 votes; } /// @notice A record of votes checkpoints for each account, by index mapping (address => mapping (uint32 => Checkpoint)) public checkpoints; /// @notice The number of checkpoints for each account mapping (address => uint32) public numCheckpoints; /// @notice The EIP-712 typehash for the contract's domain bytes32 public constant DOMAIN_TYPEHASH = keccak256("EIP712Domain(string name,uint256 chainId,address verifyingContract)"); /// @notice The EIP-712 typehash for the delegation struct used by the contract bytes32 public constant DELEGATION_TYPEHASH = keccak256("Delegation(address delegatee,uint256 nonce,uint256 expiry)"); /// @notice A record of states for signing / validating signatures mapping (address => uint) public nonces; /// @notice An event thats emitted when an account changes its delegate event DelegateChanged(address indexed delegator, address indexed fromDelegate, address indexed toDelegate); /// @notice An event thats emitted when a delegate account's vote balance changes event DelegateVotesChanged(address indexed delegate, uint previousBalance, uint newBalance); /// @notice The standard EIP-20 transfer event event Transfer(address indexed from, address indexed to, uint256 amount); /// @notice The standard EIP-20 approval event event Approval(address indexed owner, address indexed spender, uint256 amount); /** * @notice Construct a new Comp token * @param account The initial account to grant all the tokens */ constructor(address account) public { balances[account] = uint96(totalSupply); emit Transfer(address(0), account, totalSupply); } /** * @notice Get the number of tokens `spender` is approved to spend on behalf of `account` * @param account The address of the account holding the funds * @param spender The address of the account spending the funds * @return The number of tokens approved */ function allowance(address account, address spender) external view returns (uint) { return allowances[account][spender]; } /** * @notice Approve `spender` to transfer up to `amount` from `src` * @dev This will overwrite the approval amount for `spender` * and is subject to issues noted [here](https://eips.ethereum.org/EIPS/eip-20#approve) * @param spender The address of the account which may transfer tokens * @param rawAmount The number of tokens that are approved (2^256-1 means infinite) * @return Whether or not the approval succeeded */ function approve(address spender, uint rawAmount) external returns (bool) { uint96 amount; if (rawAmount == uint(-1)) { amount = uint96(-1); } else { amount = safe96(rawAmount, "Comp::approve: amount exceeds 96 bits"); } allowances[msg.sender][spender] = amount; emit Approval(msg.sender, spender, amount); return true; } /** * @notice Get the number of tokens held by the `account` * @param account The address of the account to get the balance of * @return The number of tokens held */ function balanceOf(address account) external view returns (uint) { return balances[account]; } /** * @notice Transfer `amount` tokens from `msg.sender` to `dst` * @param dst The address of the destination account * @param rawAmount The number of tokens to transfer * @return Whether or not the transfer succeeded */ function transfer(address dst, uint rawAmount) external returns (bool) { uint96 amount = safe96(rawAmount, "Comp::transfer: amount exceeds 96 bits"); _transferTokens(msg.sender, dst, amount); return true; } /** * @notice Transfer `amount` tokens from `src` to `dst` * @param src The address of the source account * @param dst The address of the destination account * @param rawAmount The number of tokens to transfer * @return Whether or not the transfer succeeded */ function transferFrom(address src, address dst, uint rawAmount) external returns (bool) { address spender = msg.sender; uint96 spenderAllowance = allowances[src][spender]; uint96 amount = safe96(rawAmount, "Comp::approve: amount exceeds 96 bits"); if (spender != src && spenderAllowance != uint96(-1)) { uint96 newAllowance = sub96(spenderAllowance, amount, "Comp::transferFrom: transfer amount exceeds spender allowance"); allowances[src][spender] = newAllowance; emit Approval(src, spender, newAllowance); } _transferTokens(src, dst, amount); return true; } /** * @notice Delegate votes from `msg.sender` to `delegatee` * @param delegatee The address to delegate votes to */ function delegate(address delegatee) public { return _delegate(msg.sender, delegatee); } /** * @notice Delegates votes from signatory to `delegatee` * @param delegatee The address to delegate votes to * @param nonce The contract state required to match the signature * @param expiry The time at which to expire the signature * @param v The recovery byte of the signature * @param r Half of the ECDSA signature pair * @param s Half of the ECDSA signature pair */ function delegateBySig(address delegatee, uint nonce, uint expiry, uint8 v, bytes32 r, bytes32 s) public { bytes32 domainSeparator = keccak256(abi.encode(DOMAIN_TYPEHASH, keccak256(bytes(name)), getChainId(), address(this))); bytes32 structHash = keccak256(abi.encode(DELEGATION_TYPEHASH, delegatee, nonce, expiry)); bytes32 digest = keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash)); address signatory = ecrecover(digest, v, r, s); require(signatory != address(0), "Comp::delegateBySig: invalid signature"); require(nonce == nonces[signatory]++, "Comp::delegateBySig: invalid nonce"); require(now <= expiry, "Comp::delegateBySig: signature expired"); return _delegate(signatory, delegatee); } /** * @notice Gets the current votes balance for `account` * @param account The address to get votes balance * @return The number of current votes for `account` */ function getCurrentVotes(address account) external view returns (uint96) { uint32 nCheckpoints = numCheckpoints[account]; return nCheckpoints > 0 ? checkpoints[account][nCheckpoints - 1].votes : 0; } /** * @notice Determine the prior number of votes for an account as of a block number * @dev Block number must be a finalized block or else this function will revert to prevent misinformation. * @param account The address of the account to check * @param blockNumber The block number to get the vote balance at * @return The number of votes the account had as of the given block */ function getPriorVotes(address account, uint blockNumber) public view returns (uint96) { require(blockNumber < block.number, "Comp::getPriorVotes: not yet determined"); uint32 nCheckpoints = numCheckpoints[account]; if (nCheckpoints == 0) { return 0; } // First check most recent balance if (checkpoints[account][nCheckpoints - 1].fromBlock <= blockNumber) { return checkpoints[account][nCheckpoints - 1].votes; } // Next check implicit zero balance if (checkpoints[account][0].fromBlock > blockNumber) { return 0; } uint32 lower = 0; uint32 upper = nCheckpoints - 1; while (upper > lower) { uint32 center = upper - (upper - lower) / 2; // ceil, avoiding overflow Checkpoint memory cp = checkpoints[account][center]; if (cp.fromBlock == blockNumber) { return cp.votes; } else if (cp.fromBlock < blockNumber) { lower = center; } else { upper = center - 1; } } return checkpoints[account][lower].votes; } function _delegate(address delegator, address delegatee) internal { address currentDelegate = delegates[delegator]; uint96 delegatorBalance = balances[delegator]; delegates[delegator] = delegatee; emit DelegateChanged(delegator, currentDelegate, delegatee); _moveDelegates(currentDelegate, delegatee, delegatorBalance); } function _transferTokens(address src, address dst, uint96 amount) internal { require(src != address(0), "Comp::_transferTokens: cannot transfer from the zero address"); require(dst != address(0), "Comp::_transferTokens: cannot transfer to the zero address"); balances[src] = sub96(balances[src], amount, "Comp::_transferTokens: transfer amount exceeds balance"); balances[dst] = add96(balances[dst], amount, "Comp::_transferTokens: transfer amount overflows"); emit Transfer(src, dst, amount); _moveDelegates(delegates[src], delegates[dst], amount); } function _moveDelegates(address srcRep, address dstRep, uint96 amount) internal { if (srcRep != dstRep && amount > 0) { if (srcRep != address(0)) { uint32 srcRepNum = numCheckpoints[srcRep]; uint96 srcRepOld = srcRepNum > 0 ? checkpoints[srcRep][srcRepNum - 1].votes : 0; uint96 srcRepNew = sub96(srcRepOld, amount, "Comp::_moveVotes: vote amount underflows"); _writeCheckpoint(srcRep, srcRepNum, srcRepOld, srcRepNew); } if (dstRep != address(0)) { uint32 dstRepNum = numCheckpoints[dstRep]; uint96 dstRepOld = dstRepNum > 0 ? checkpoints[dstRep][dstRepNum - 1].votes : 0; uint96 dstRepNew = add96(dstRepOld, amount, "Comp::_moveVotes: vote amount overflows"); _writeCheckpoint(dstRep, dstRepNum, dstRepOld, dstRepNew); } } } function _writeCheckpoint(address delegatee, uint32 nCheckpoints, uint96 oldVotes, uint96 newVotes) internal { uint32 blockNumber = safe32(block.number, "Comp::_writeCheckpoint: block number exceeds 32 bits"); if (nCheckpoints > 0 && checkpoints[delegatee][nCheckpoints - 1].fromBlock == blockNumber) { checkpoints[delegatee][nCheckpoints - 1].votes = newVotes; } else { checkpoints[delegatee][nCheckpoints] = Checkpoint(blockNumber, newVotes); numCheckpoints[delegatee] = nCheckpoints + 1; } emit DelegateVotesChanged(delegatee, oldVotes, newVotes); } function safe32(uint n, string memory errorMessage) internal pure returns (uint32) { require(n < 2**32, errorMessage); return uint32(n); } function safe96(uint n, string memory errorMessage) internal pure returns (uint96) { require(n < 2**96, errorMessage); return uint96(n); } function add96(uint96 a, uint96 b, string memory errorMessage) internal pure returns (uint96) { uint96 c = a + b; require(c >= a, errorMessage); return c; } function sub96(uint96 a, uint96 b, string memory errorMessage) internal pure returns (uint96) { require(b <= a, errorMessage); return a - b; } function getChainId() internal pure returns (uint) { uint256 chainId; assembly { chainId := chainid() } return chainId; } } contract ComptrollerInterface { /// @notice Indicator that this is a Comptroller contract (for inspection) bool public constant isComptroller = true; /*** Assets You Are In ***/ function enterMarkets(address[] calldata cTokens) external returns (uint[] memory); function exitMarket(address cToken) external returns (uint); /*** Policy Hooks ***/ function mintAllowed(address cToken, address minter, uint mintAmount) external returns (uint); function mintVerify(address cToken, address minter, uint mintAmount, uint mintTokens) external; function redeemAllowed(address cToken, address redeemer, uint redeemTokens) external returns (uint); function redeemVerify(address cToken, address redeemer, uint redeemAmount, uint redeemTokens) external; function borrowAllowed(address cToken, address borrower, uint borrowAmount) external returns (uint); function borrowVerify(address cToken, address borrower, uint borrowAmount) external; function repayBorrowAllowed( address cToken, address payer, address borrower, uint repayAmount) external returns (uint); function repayBorrowVerify( address cToken, address payer, address borrower, uint repayAmount, uint borrowerIndex) external; function liquidateBorrowAllowed( address cTokenBorrowed, address cTokenCollateral, address liquidator, address borrower, uint repayAmount) external returns (uint); function liquidateBorrowVerify( address cTokenBorrowed, address cTokenCollateral, address liquidator, address borrower, uint repayAmount, uint seizeTokens) external; function seizeAllowed( address cTokenCollateral, address cTokenBorrowed, address liquidator, address borrower, uint seizeTokens) external returns (uint); function seizeVerify( address cTokenCollateral, address cTokenBorrowed, address liquidator, address borrower, uint seizeTokens) external; function transferAllowed(address cToken, address src, address dst, uint transferTokens) external returns (uint); function transferVerify(address cToken, address src, address dst, uint transferTokens) external; /*** Liquidity/Liquidation Calculations ***/ function liquidateCalculateSeizeTokens( address cTokenBorrowed, address cTokenCollateral, uint repayAmount) external view returns (uint, uint); } contract UnitrollerAdminStorage { /** * @notice Administrator for this contract */ address public admin; /** * @notice Pending administrator for this contract */ address public pendingAdmin; /** * @notice Active brains of Unitroller */ address public comptrollerImplementation; /** * @notice Pending brains of Unitroller */ address public pendingComptrollerImplementation; } contract ComptrollerV1Storage is UnitrollerAdminStorage { /** * @notice Oracle which gives the price of any given asset */ PriceOracle public oracle; /** * @notice Multiplier used to calculate the maximum repayAmount when liquidating a borrow */ uint public closeFactorMantissa; /** * @notice Multiplier representing the discount on collateral that a liquidator receives */ uint public liquidationIncentiveMantissa; /** * @notice Max number of assets a single account can participate in (borrow or use as collateral) */ uint public maxAssets; /** * @notice Per-account mapping of "assets you are in", capped by maxAssets */ mapping(address => CToken[]) public accountAssets; } contract ComptrollerV2Storage is ComptrollerV1Storage { struct Market { /// @notice Whether or not this market is listed bool isListed; /** * @notice Multiplier representing the most one can borrow against their collateral in this market. * For instance, 0.9 to allow borrowing 90% of collateral value. * Must be between 0 and 1, and stored as a mantissa. */ uint collateralFactorMantissa; /// @notice Per-market mapping of "accounts in this asset" mapping(address => bool) accountMembership; /// @notice Whether or not this market receives COMP bool isComped; } /** * @notice Official mapping of cTokens -> Market metadata * @dev Used e.g. to determine if a market is supported */ mapping(address => Market) public markets; /** * @notice The Pause Guardian can pause certain actions as a safety mechanism. * Actions which allow users to remove their own assets cannot be paused. * Liquidation / seizing / transfer can only be paused globally, not by market. */ address public pauseGuardian; bool public _mintGuardianPaused; bool public _borrowGuardianPaused; bool public transferGuardianPaused; bool public seizeGuardianPaused; mapping(address => bool) public mintGuardianPaused; mapping(address => bool) public borrowGuardianPaused; } contract ComptrollerV3Storage is ComptrollerV2Storage { struct CompMarketState { /// @notice The market's last updated compBorrowIndex or compSupplyIndex uint224 index; /// @notice The block number the index was last updated at uint32 block; } /// @notice A list of all markets CToken[] public allMarkets; /// @notice The rate at which the flywheel distributes COMP, per block uint public compRate; /// @notice The portion of compRate that each market currently receives mapping(address => uint) public compSpeeds; /// @notice The mining cheese rule, 0 - minting by supply, 1 - minting by borrow uint public miningRule; /// @notice The COMP market supply state for each market mapping(address => CompMarketState) public compSupplyState; /// @notice The COMP market borrow state for each market mapping(address => CompMarketState) public compBorrowState; /// @notice The COMP borrow index for each market for each supplier as of the last time they accrued COMP mapping(address => mapping(address => uint)) public compSupplierIndex; /// @notice The COMP borrow index for each market for each borrower as of the last time they accrued COMP mapping(address => mapping(address => uint)) public compBorrowerIndex; /// @notice The COMP accrued but not yet transferred to each user mapping(address => uint) public compAccrued; /// @notice The mining CHEESE Buff mapping(address => uint) public miningBuff; } interface EIP20Interface { function name() external view returns (string memory); function symbol() external view returns (string memory); function decimals() external view returns (uint8); /** * @notice Get the total number of tokens in circulation * @return The supply of tokens */ function totalSupply() external view returns (uint256); /** * @notice Gets the balance of the specified address * @param owner The address from which the balance will be retrieved * @return The balance */ function balanceOf(address owner) external view returns (uint256 balance); /** * @notice Transfer `amount` tokens from `msg.sender` to `dst` * @param dst The address of the destination account * @param amount The number of tokens to transfer * @return Whether or not the transfer succeeded */ function transfer(address dst, uint256 amount) external returns (bool success); /** * @notice Transfer `amount` tokens from `src` to `dst` * @param src The address of the source account * @param dst The address of the destination account * @param amount The number of tokens to transfer * @return Whether or not the transfer succeeded */ function transferFrom(address src, address dst, uint256 amount) external returns (bool success); /** * @notice Approve `spender` to transfer up to `amount` from `src` * @dev This will overwrite the approval amount for `spender` * and is subject to issues noted [here](https://eips.ethereum.org/EIPS/eip-20#approve) * @param spender The address of the account which may transfer tokens * @param amount The number of tokens that are approved (-1 means infinite) * @return Whether or not the approval succeeded */ function approve(address spender, uint256 amount) external returns (bool success); /** * @notice Get the current allowance from `owner` for `spender` * @param owner The address of the account which owns the tokens to be spent * @param spender The address of the account which may transfer tokens * @return The number of tokens allowed to be spent (-1 means infinite) */ function allowance(address owner, address spender) external view returns (uint256 remaining); event Transfer(address indexed from, address indexed to, uint256 amount); event Approval(address indexed owner, address indexed spender, uint256 amount); } interface EIP20NonStandardInterface { /** * @notice Get the total number of tokens in circulation * @return The supply of tokens */ function totalSupply() external view returns (uint256); /** * @notice Gets the balance of the specified address * @param owner The address from which the balance will be retrieved * @return The balance */ function balanceOf(address owner) external view returns (uint256 balance); /// /// !!!!!!!!!!!!!! /// !!! NOTICE !!! `transfer` does not return a value, in violation of the ERC-20 specification /// !!!!!!!!!!!!!! /// /** * @notice Transfer `amount` tokens from `msg.sender` to `dst` * @param dst The address of the destination account * @param amount The number of tokens to transfer */ function transfer(address dst, uint256 amount) external; /// /// !!!!!!!!!!!!!! /// !!! NOTICE !!! `transferFrom` does not return a value, in violation of the ERC-20 specification /// !!!!!!!!!!!!!! /// /** * @notice Transfer `amount` tokens from `src` to `dst` * @param src The address of the source account * @param dst The address of the destination account * @param amount The number of tokens to transfer */ function transferFrom(address src, address dst, uint256 amount) external; /** * @notice Approve `spender` to transfer up to `amount` from `src` * @dev This will overwrite the approval amount for `spender` * and is subject to issues noted [here](https://eips.ethereum.org/EIPS/eip-20#approve) * @param spender The address of the account which may transfer tokens * @param amount The number of tokens that are approved * @return Whether or not the approval succeeded */ function approve(address spender, uint256 amount) external returns (bool success); /** * @notice Get the current allowance from `owner` for `spender` * @param owner The address of the account which owns the tokens to be spent * @param spender The address of the account which may transfer tokens * @return The number of tokens allowed to be spent */ function allowance(address owner, address spender) external view returns (uint256 remaining); event Transfer(address indexed from, address indexed to, uint256 amount); event Approval(address indexed owner, address indexed spender, uint256 amount); } contract ComptrollerErrorReporter { enum Error { NO_ERROR, UNAUTHORIZED, COMPTROLLER_MISMATCH, INSUFFICIENT_SHORTFALL, INSUFFICIENT_LIQUIDITY, INVALID_CLOSE_FACTOR, INVALID_COLLATERAL_FACTOR, INVALID_LIQUIDATION_INCENTIVE, MARKET_NOT_ENTERED, // no longer possible MARKET_NOT_LISTED, MARKET_ALREADY_LISTED, MATH_ERROR, NONZERO_BORROW_BALANCE, PRICE_ERROR, REJECTION, SNAPSHOT_ERROR, TOO_MANY_ASSETS, TOO_MUCH_REPAY } enum FailureInfo { ACCEPT_ADMIN_PENDING_ADMIN_CHECK, ACCEPT_PENDING_IMPLEMENTATION_ADDRESS_CHECK, EXIT_MARKET_BALANCE_OWED, EXIT_MARKET_REJECTION, SET_CLOSE_FACTOR_OWNER_CHECK, SET_CLOSE_FACTOR_VALIDATION, SET_COLLATERAL_FACTOR_OWNER_CHECK, SET_COLLATERAL_FACTOR_NO_EXISTS, SET_COLLATERAL_FACTOR_VALIDATION, SET_COLLATERAL_FACTOR_WITHOUT_PRICE, SET_IMPLEMENTATION_OWNER_CHECK, SET_LIQUIDATION_INCENTIVE_OWNER_CHECK, SET_LIQUIDATION_INCENTIVE_VALIDATION, SET_MAX_ASSETS_OWNER_CHECK, SET_PENDING_ADMIN_OWNER_CHECK, SET_PENDING_IMPLEMENTATION_OWNER_CHECK, SET_PRICE_ORACLE_OWNER_CHECK, SUPPORT_MARKET_EXISTS, SUPPORT_MARKET_OWNER_CHECK, SET_PAUSE_GUARDIAN_OWNER_CHECK } /** * @dev `error` corresponds to enum Error; `info` corresponds to enum FailureInfo, and `detail` is an arbitrary * contract-specific code that enables us to report opaque error codes from upgradeable contracts. **/ event Failure(uint error, uint info, uint detail); /** * @dev use this when reporting a known error from the money market or a non-upgradeable collaborator */ function fail(Error err, FailureInfo info) internal returns (uint) { emit Failure(uint(err), uint(info), 0); return uint(err); } /** * @dev use this when reporting an opaque error from an upgradeable collaborator contract */ function failOpaque(Error err, FailureInfo info, uint opaqueError) internal returns (uint) { emit Failure(uint(err), uint(info), opaqueError); return uint(err); } } contract TokenErrorReporter { enum Error { NO_ERROR, UNAUTHORIZED, BAD_INPUT, COMPTROLLER_REJECTION, COMPTROLLER_CALCULATION_ERROR, INTEREST_RATE_MODEL_ERROR, INVALID_ACCOUNT_PAIR, INVALID_CLOSE_AMOUNT_REQUESTED, INVALID_COLLATERAL_FACTOR, MATH_ERROR, MARKET_NOT_FRESH, MARKET_NOT_LISTED, TOKEN_INSUFFICIENT_ALLOWANCE, TOKEN_INSUFFICIENT_BALANCE, TOKEN_INSUFFICIENT_CASH, TOKEN_TRANSFER_IN_FAILED, TOKEN_TRANSFER_OUT_FAILED } /* * Note: FailureInfo (but not Error) is kept in alphabetical order * This is because FailureInfo grows significantly faster, and * the order of Error has some meaning, while the order of FailureInfo * is entirely arbitrary. */ enum FailureInfo { ACCEPT_ADMIN_PENDING_ADMIN_CHECK, ACCRUE_INTEREST_ACCUMULATED_INTEREST_CALCULATION_FAILED, ACCRUE_INTEREST_BORROW_RATE_CALCULATION_FAILED, ACCRUE_INTEREST_NEW_BORROW_INDEX_CALCULATION_FAILED, ACCRUE_INTEREST_NEW_TOTAL_BORROWS_CALCULATION_FAILED, ACCRUE_INTEREST_NEW_TOTAL_RESERVES_CALCULATION_FAILED, ACCRUE_INTEREST_SIMPLE_INTEREST_FACTOR_CALCULATION_FAILED, BORROW_ACCUMULATED_BALANCE_CALCULATION_FAILED, BORROW_ACCRUE_INTEREST_FAILED, BORROW_CASH_NOT_AVAILABLE, BORROW_FRESHNESS_CHECK, BORROW_NEW_TOTAL_BALANCE_CALCULATION_FAILED, BORROW_NEW_ACCOUNT_BORROW_BALANCE_CALCULATION_FAILED, BORROW_MARKET_NOT_LISTED, BORROW_COMPTROLLER_REJECTION, LIQUIDATE_ACCRUE_BORROW_INTEREST_FAILED, LIQUIDATE_ACCRUE_COLLATERAL_INTEREST_FAILED, LIQUIDATE_COLLATERAL_FRESHNESS_CHECK, LIQUIDATE_COMPTROLLER_REJECTION, LIQUIDATE_COMPTROLLER_CALCULATE_AMOUNT_SEIZE_FAILED, LIQUIDATE_CLOSE_AMOUNT_IS_UINT_MAX, LIQUIDATE_CLOSE_AMOUNT_IS_ZERO, LIQUIDATE_FRESHNESS_CHECK, LIQUIDATE_LIQUIDATOR_IS_BORROWER, LIQUIDATE_REPAY_BORROW_FRESH_FAILED, LIQUIDATE_SEIZE_BALANCE_INCREMENT_FAILED, LIQUIDATE_SEIZE_BALANCE_DECREMENT_FAILED, LIQUIDATE_SEIZE_COMPTROLLER_REJECTION, LIQUIDATE_SEIZE_LIQUIDATOR_IS_BORROWER, LIQUIDATE_SEIZE_TOO_MUCH, MINT_ACCRUE_INTEREST_FAILED, MINT_COMPTROLLER_REJECTION, MINT_EXCHANGE_CALCULATION_FAILED, MINT_EXCHANGE_RATE_READ_FAILED, MINT_FRESHNESS_CHECK, MINT_NEW_ACCOUNT_BALANCE_CALCULATION_FAILED, MINT_NEW_TOTAL_SUPPLY_CALCULATION_FAILED, MINT_TRANSFER_IN_FAILED, MINT_TRANSFER_IN_NOT_POSSIBLE, REDEEM_ACCRUE_INTEREST_FAILED, REDEEM_COMPTROLLER_REJECTION, REDEEM_EXCHANGE_TOKENS_CALCULATION_FAILED, REDEEM_EXCHANGE_AMOUNT_CALCULATION_FAILED, REDEEM_EXCHANGE_RATE_READ_FAILED, REDEEM_FRESHNESS_CHECK, REDEEM_NEW_ACCOUNT_BALANCE_CALCULATION_FAILED, REDEEM_NEW_TOTAL_SUPPLY_CALCULATION_FAILED, REDEEM_TRANSFER_OUT_NOT_POSSIBLE, REDUCE_RESERVES_ACCRUE_INTEREST_FAILED, REDUCE_RESERVES_ADMIN_CHECK, REDUCE_RESERVES_CASH_NOT_AVAILABLE, REDUCE_RESERVES_FRESH_CHECK, REDUCE_RESERVES_VALIDATION, REPAY_BEHALF_ACCRUE_INTEREST_FAILED, REPAY_BORROW_ACCRUE_INTEREST_FAILED, REPAY_BORROW_ACCUMULATED_BALANCE_CALCULATION_FAILED, REPAY_BORROW_COMPTROLLER_REJECTION, REPAY_BORROW_FRESHNESS_CHECK, REPAY_BORROW_NEW_ACCOUNT_BORROW_BALANCE_CALCULATION_FAILED, REPAY_BORROW_NEW_TOTAL_BALANCE_CALCULATION_FAILED, REPAY_BORROW_TRANSFER_IN_NOT_POSSIBLE, SET_COLLATERAL_FACTOR_OWNER_CHECK, SET_COLLATERAL_FACTOR_VALIDATION, SET_COMPTROLLER_OWNER_CHECK, SET_INTEREST_RATE_MODEL_ACCRUE_INTEREST_FAILED, SET_INTEREST_RATE_MODEL_FRESH_CHECK, SET_INTEREST_RATE_MODEL_OWNER_CHECK, SET_MAX_ASSETS_OWNER_CHECK, SET_ORACLE_MARKET_NOT_LISTED, SET_PENDING_ADMIN_OWNER_CHECK, SET_RESERVE_FACTOR_ACCRUE_INTEREST_FAILED, SET_RESERVE_FACTOR_ADMIN_CHECK, SET_RESERVE_FACTOR_FRESH_CHECK, SET_RESERVE_FACTOR_BOUNDS_CHECK, TRANSFER_COMPTROLLER_REJECTION, TRANSFER_NOT_ALLOWED, TRANSFER_NOT_ENOUGH, TRANSFER_TOO_MUCH, ADD_RESERVES_ACCRUE_INTEREST_FAILED, ADD_RESERVES_FRESH_CHECK, ADD_RESERVES_TRANSFER_IN_NOT_POSSIBLE } /** * @dev `error` corresponds to enum Error; `info` corresponds to enum FailureInfo, and `detail` is an arbitrary * contract-specific code that enables us to report opaque error codes from upgradeable contracts. **/ event Failure(uint error, uint info, uint detail); /** * @dev use this when reporting a known error from the money market or a non-upgradeable collaborator */ function fail(Error err, FailureInfo info) internal returns (uint) { emit Failure(uint(err), uint(info), 0); return uint(err); } /** * @dev use this when reporting an opaque error from an upgradeable collaborator contract */ function failOpaque(Error err, FailureInfo info, uint opaqueError) internal returns (uint) { emit Failure(uint(err), uint(info), opaqueError); return uint(err); } } contract Exponential is CarefulMath { uint constant expScale = 1e18; uint constant doubleScale = 1e36; uint constant halfExpScale = expScale/2; uint constant mantissaOne = expScale; struct Exp { uint mantissa; } struct Double { uint mantissa; } /** * @dev Creates an exponential from numerator and denominator values. * Note: Returns an error if (`num` * 10e18) > MAX_INT, * or if `denom` is zero. */ function getExp(uint num, uint denom) pure internal returns (MathError, Exp memory) { (MathError err0, uint scaledNumerator) = mulUInt(num, expScale); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } (MathError err1, uint rational) = divUInt(scaledNumerator, denom); if (err1 != MathError.NO_ERROR) { return (err1, Exp({mantissa: 0})); } return (MathError.NO_ERROR, Exp({mantissa: rational})); } /** * @dev Adds two exponentials, returning a new exponential. */ function addExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) { (MathError error, uint result) = addUInt(a.mantissa, b.mantissa); return (error, Exp({mantissa: result})); } /** * @dev Subtracts two exponentials, returning a new exponential. */ function subExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) { (MathError error, uint result) = subUInt(a.mantissa, b.mantissa); return (error, Exp({mantissa: result})); } /** * @dev Multiply an Exp by a scalar, returning a new Exp. */ function mulScalar(Exp memory a, uint scalar) pure internal returns (MathError, Exp memory) { (MathError err0, uint scaledMantissa) = mulUInt(a.mantissa, scalar); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } return (MathError.NO_ERROR, Exp({mantissa: scaledMantissa})); } /** * @dev Multiply an Exp by a scalar, then truncate to return an unsigned integer. */ function mulScalarTruncate(Exp memory a, uint scalar) pure internal returns (MathError, uint) { (MathError err, Exp memory product) = mulScalar(a, scalar); if (err != MathError.NO_ERROR) { return (err, 0); } return (MathError.NO_ERROR, truncate(product)); } /** * @dev Multiply an Exp by a scalar, truncate, then add an to an unsigned integer, returning an unsigned integer. */ function mulScalarTruncateAddUInt(Exp memory a, uint scalar, uint addend) pure internal returns (MathError, uint) { (MathError err, Exp memory product) = mulScalar(a, scalar); if (err != MathError.NO_ERROR) { return (err, 0); } return addUInt(truncate(product), addend); } /** * @dev Divide an Exp by a scalar, returning a new Exp. */ function divScalar(Exp memory a, uint scalar) pure internal returns (MathError, Exp memory) { (MathError err0, uint descaledMantissa) = divUInt(a.mantissa, scalar); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } return (MathError.NO_ERROR, Exp({mantissa: descaledMantissa})); } /** * @dev Divide a scalar by an Exp, returning a new Exp. */ function divScalarByExp(uint scalar, Exp memory divisor) pure internal returns (MathError, Exp memory) { /* We are doing this as: getExp(mulUInt(expScale, scalar), divisor.mantissa) How it works: Exp = a / b; Scalar = s; `s / (a / b)` = `b * s / a` and since for an Exp `a = mantissa, b = expScale` */ (MathError err0, uint numerator) = mulUInt(expScale, scalar); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } return getExp(numerator, divisor.mantissa); } /** * @dev Divide a scalar by an Exp, then truncate to return an unsigned integer. */ function divScalarByExpTruncate(uint scalar, Exp memory divisor) pure internal returns (MathError, uint) { (MathError err, Exp memory fraction) = divScalarByExp(scalar, divisor); if (err != MathError.NO_ERROR) { return (err, 0); } return (MathError.NO_ERROR, truncate(fraction)); } /** * @dev Multiplies two exponentials, returning a new exponential. */ function mulExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) { (MathError err0, uint doubleScaledProduct) = mulUInt(a.mantissa, b.mantissa); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } // We add half the scale before dividing so that we get rounding instead of truncation. // See "Listing 6" and text above it at https://accu.org/index.php/journals/1717 // Without this change, a result like 6.6...e-19 will be truncated to 0 instead of being rounded to 1e-18. (MathError err1, uint doubleScaledProductWithHalfScale) = addUInt(halfExpScale, doubleScaledProduct); if (err1 != MathError.NO_ERROR) { return (err1, Exp({mantissa: 0})); } (MathError err2, uint product) = divUInt(doubleScaledProductWithHalfScale, expScale); // The only error `div` can return is MathError.DIVISION_BY_ZERO but we control `expScale` and it is not zero. assert(err2 == MathError.NO_ERROR); return (MathError.NO_ERROR, Exp({mantissa: product})); } /** * @dev Multiplies two exponentials given their mantissas, returning a new exponential. */ function mulExp(uint a, uint b) pure internal returns (MathError, Exp memory) { return mulExp(Exp({mantissa: a}), Exp({mantissa: b})); } /** * @dev Multiplies three exponentials, returning a new exponential. */ function mulExp3(Exp memory a, Exp memory b, Exp memory c) pure internal returns (MathError, Exp memory) { (MathError err, Exp memory ab) = mulExp(a, b); if (err != MathError.NO_ERROR) { return (err, ab); } return mulExp(ab, c); } /** * @dev Divides two exponentials, returning a new exponential. * (a/scale) / (b/scale) = (a/scale) * (scale/b) = a/b, * which we can scale as an Exp by calling getExp(a.mantissa, b.mantissa) */ function divExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) { return getExp(a.mantissa, b.mantissa); } /** * @dev Truncates the given exp to a whole number value. * For example, truncate(Exp{mantissa: 15 * expScale}) = 15 */ function truncate(Exp memory exp) pure internal returns (uint) { // Note: We are not using careful math here as we're performing a division that cannot fail return exp.mantissa / expScale; } /** * @dev Checks if first Exp is less than second Exp. */ function lessThanExp(Exp memory left, Exp memory right) pure internal returns (bool) { return left.mantissa < right.mantissa; } /** * @dev Checks if left Exp <= right Exp. */ function lessThanOrEqualExp(Exp memory left, Exp memory right) pure internal returns (bool) { return left.mantissa <= right.mantissa; } /** * @dev Checks if left Exp > right Exp. */ function greaterThanExp(Exp memory left, Exp memory right) pure internal returns (bool) { return left.mantissa > right.mantissa; } /** * @dev returns true if Exp is exactly zero */ function isZeroExp(Exp memory value) pure internal returns (bool) { return value.mantissa == 0; } function safe224(uint n, string memory errorMessage) pure internal returns (uint224) { require(n < 2**224, errorMessage); return uint224(n); } function safe32(uint n, string memory errorMessage) pure internal returns (uint32) { require(n < 2**32, errorMessage); return uint32(n); } function add_(Exp memory a, Exp memory b) pure internal returns (Exp memory) { return Exp({mantissa: add_(a.mantissa, b.mantissa)}); } function add_(Double memory a, Double memory b) pure internal returns (Double memory) { return Double({mantissa: add_(a.mantissa, b.mantissa)}); } function add_(uint a, uint b) pure internal returns (uint) { return add_(a, b, "addition overflow"); } function add_(uint a, uint b, string memory errorMessage) pure internal returns (uint) { uint c = a + b; require(c >= a, errorMessage); return c; } function sub_(Exp memory a, Exp memory b) pure internal returns (Exp memory) { return Exp({mantissa: sub_(a.mantissa, b.mantissa)}); } function sub_(Double memory a, Double memory b) pure internal returns (Double memory) { return Double({mantissa: sub_(a.mantissa, b.mantissa)}); } function sub_(uint a, uint b) pure internal returns (uint) { return sub_(a, b, "subtraction underflow"); } function sub_(uint a, uint b, string memory errorMessage) pure internal returns (uint) { require(b <= a, errorMessage); return a - b; } function mul_(Exp memory a, Exp memory b) pure internal returns (Exp memory) { return Exp({mantissa: mul_(a.mantissa, b.mantissa) / expScale}); } function mul_(Exp memory a, uint b) pure internal returns (Exp memory) { return Exp({mantissa: mul_(a.mantissa, b)}); } function mul_(uint a, Exp memory b) pure internal returns (uint) { return mul_(a, b.mantissa) / expScale; } function mul_(Double memory a, Double memory b) pure internal returns (Double memory) { return Double({mantissa: mul_(a.mantissa, b.mantissa) / doubleScale}); } function mul_(Double memory a, uint b) pure internal returns (Double memory) { return Double({mantissa: mul_(a.mantissa, b)}); } function mul_(uint a, Double memory b) pure internal returns (uint) { return mul_(a, b.mantissa) / doubleScale; } function mul_(uint a, uint b) pure internal returns (uint) { return mul_(a, b, "multiplication overflow"); } function mul_(uint a, uint b, string memory errorMessage) pure internal returns (uint) { if (a == 0 || b == 0) { return 0; } uint c = a * b; require(c / a == b, errorMessage); return c; } function div_(Exp memory a, Exp memory b) pure internal returns (Exp memory) { return Exp({mantissa: div_(mul_(a.mantissa, expScale), b.mantissa)}); } function div_(Exp memory a, uint b) pure internal returns (Exp memory) { return Exp({mantissa: div_(a.mantissa, b)}); } function div_(uint a, Exp memory b) pure internal returns (uint) { return div_(mul_(a, expScale), b.mantissa); } function div_(Double memory a, Double memory b) pure internal returns (Double memory) { return Double({mantissa: div_(mul_(a.mantissa, doubleScale), b.mantissa)}); } function div_(Double memory a, uint b) pure internal returns (Double memory) { return Double({mantissa: div_(a.mantissa, b)}); } function div_(uint a, Double memory b) pure internal returns (uint) { return div_(mul_(a, doubleScale), b.mantissa); } function div_(uint a, uint b) pure internal returns (uint) { return div_(a, b, "divide by zero"); } function div_(uint a, uint b, string memory errorMessage) pure internal returns (uint) { require(b > 0, errorMessage); return a / b; } function fraction(uint a, uint b) pure internal returns (Double memory) { return Double({mantissa: div_(mul_(a, doubleScale), b)}); } } contract InterestRateModel { /// @notice Indicator that this is an InterestRateModel contract (for inspection) bool public constant isInterestRateModel = true; /** * @notice Calculates the current borrow interest rate per block * @param cash The total amount of cash the market has * @param borrows The total amount of borrows the market has outstanding * @param reserves The total amnount of reserves the market has * @return The borrow rate per block (as a percentage, and scaled by 1e18) */ function getBorrowRate(uint cash, uint borrows, uint reserves) external view returns (uint); /** * @notice Calculates the current supply interest rate per block * @param cash The total amount of cash the market has * @param borrows The total amount of borrows the market has outstanding * @param reserves The total amnount of reserves the market has * @param reserveFactorMantissa The current reserve factor the market has * @return The supply rate per block (as a percentage, and scaled by 1e18) */ function getSupplyRate(uint cash, uint borrows, uint reserves, uint reserveFactorMantissa) external view returns (uint); } contract PriceOracle { /// @notice Indicator that this is a PriceOracle contract (for inspection) bool public constant isPriceOracle = true; /** * @notice Get the underlying price of a cToken asset * @param sToken The cToken to get the underlying price of * @return The underlying asset price mantissa (scaled by 1e18). * Zero means the price is unavailable. */ function getUnderlyingPrice(CToken sToken) external view returns (uint); } library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the addition of two unsigned integers, reverting with custom message on overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * - Addition cannot overflow. */ function add(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, errorMessage); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on underflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot underflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction underflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on underflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot underflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, errorMessage); return c; } /** * @dev Returns the integer division of two unsigned integers. * Reverts on division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. * Reverts with custom message on division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { // Solidity only automatically asserts when dividing by 0 require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } contract Unitroller is UnitrollerAdminStorage, ComptrollerErrorReporter { /** * @notice Emitted when pendingComptrollerImplementation is changed */ event NewPendingImplementation(address oldPendingImplementation, address newPendingImplementation); /** * @notice Emitted when pendingComptrollerImplementation is accepted, which means comptroller implementation is updated */ event NewImplementation(address oldImplementation, address newImplementation); /** * @notice Emitted when pendingAdmin is changed */ event NewPendingAdmin(address oldPendingAdmin, address newPendingAdmin); /** * @notice Emitted when pendingAdmin is accepted, which means admin is updated */ event NewAdmin(address oldAdmin, address newAdmin); constructor() public { // Set admin to caller admin = msg.sender; } /*** Admin Functions ***/ function _setPendingImplementation(address newPendingImplementation) public returns (uint) { if (msg.sender != admin) { return fail(Error.UNAUTHORIZED, FailureInfo.SET_PENDING_IMPLEMENTATION_OWNER_CHECK); } address oldPendingImplementation = pendingComptrollerImplementation; pendingComptrollerImplementation = newPendingImplementation; emit NewPendingImplementation(oldPendingImplementation, pendingComptrollerImplementation); return uint(Error.NO_ERROR); } /** * @notice Accepts new implementation of comptroller. msg.sender must be pendingImplementation * @dev Admin function for new implementation to accept it's role as implementation * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _acceptImplementation() public returns (uint) { // Check caller is pendingImplementation and pendingImplementation ≠ address(0) if (msg.sender != pendingComptrollerImplementation || pendingComptrollerImplementation == address(0)) { return fail(Error.UNAUTHORIZED, FailureInfo.ACCEPT_PENDING_IMPLEMENTATION_ADDRESS_CHECK); } // Save current values for inclusion in log address oldImplementation = comptrollerImplementation; address oldPendingImplementation = pendingComptrollerImplementation; comptrollerImplementation = pendingComptrollerImplementation; pendingComptrollerImplementation = address(0); emit NewImplementation(oldImplementation, comptrollerImplementation); emit NewPendingImplementation(oldPendingImplementation, pendingComptrollerImplementation); return uint(Error.NO_ERROR); } /** * @notice Begins transfer of admin rights. The newPendingAdmin must call `_acceptAdmin` to finalize the transfer. * @dev Admin function to begin change of admin. The newPendingAdmin must call `_acceptAdmin` to finalize the transfer. * @param newPendingAdmin New pending admin. * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _setPendingAdmin(address newPendingAdmin) public returns (uint) { // Check caller = admin if (msg.sender != admin) { return fail(Error.UNAUTHORIZED, FailureInfo.SET_PENDING_ADMIN_OWNER_CHECK); } // Save current value, if any, for inclusion in log address oldPendingAdmin = pendingAdmin; // Store pendingAdmin with value newPendingAdmin pendingAdmin = newPendingAdmin; // Emit NewPendingAdmin(oldPendingAdmin, newPendingAdmin) emit NewPendingAdmin(oldPendingAdmin, newPendingAdmin); return uint(Error.NO_ERROR); } /** * @notice Accepts transfer of admin rights. msg.sender must be pendingAdmin * @dev Admin function for pending admin to accept role and update admin * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _acceptAdmin() public returns (uint) { // Check caller is pendingAdmin and pendingAdmin ≠ address(0) if (msg.sender != pendingAdmin || msg.sender == address(0)) { return fail(Error.UNAUTHORIZED, FailureInfo.ACCEPT_ADMIN_PENDING_ADMIN_CHECK); } // Save current values for inclusion in log address oldAdmin = admin; address oldPendingAdmin = pendingAdmin; // Store admin with value pendingAdmin admin = pendingAdmin; // Clear the pending value pendingAdmin = address(0); emit NewAdmin(oldAdmin, admin); emit NewPendingAdmin(oldPendingAdmin, pendingAdmin); return uint(Error.NO_ERROR); } /** * @dev Delegates execution to an implementation contract. * It returns to the external caller whatever the implementation returns * or forwards reverts. */ function () payable external { // delegate all other functions to current implementation (bool success, ) = comptrollerImplementation.delegatecall(msg.data); assembly { let free_mem_ptr := mload(0x40) returndatacopy(free_mem_ptr, 0, returndatasize) switch success case 0 { revert(free_mem_ptr, returndatasize) } default { return(free_mem_ptr, returndatasize) } } } } contract CErc20Delegator is CTokenInterface, CErc20Interface, CDelegatorInterface { /** * @notice Construct a new money market * @param underlying_ The address of the underlying asset * @param comptroller_ The address of the Comptroller * @param interestRateModel_ The address of the interest rate model * @param initialExchangeRateMantissa_ The initial exchange rate, scaled by 1e18 * @param name_ ERC-20 name of this token * @param symbol_ ERC-20 symbol of this token * @param decimals_ ERC-20 decimal precision of this token * @param admin_ Address of the administrator of this token * @param implementation_ The address of the implementation the contract delegates to * @param becomeImplementationData The encoded args for becomeImplementation */ constructor(address underlying_, ComptrollerInterface comptroller_, InterestRateModel interestRateModel_, uint initialExchangeRateMantissa_, string memory name_, string memory symbol_, uint8 decimals_, address payable admin_, address implementation_, bytes memory becomeImplementationData) public { // Creator of the contract is admin during initialization admin = msg.sender; // First delegate gets to initialize the delegator (i.e. storage contract) delegateTo(implementation_, abi.encodeWithSignature("initialize(address,address,address,uint256,string,string,uint8)", underlying_, comptroller_, interestRateModel_, initialExchangeRateMantissa_, name_, symbol_, decimals_)); // New implementations always get set via the settor (post-initialize) _setImplementation(implementation_, false, becomeImplementationData); // Set the proper admin now that initialization is done admin = admin_; } /** * @notice Called by the admin to update the implementation of the delegator * @param implementation_ The address of the new implementation for delegation * @param allowResign Flag to indicate whether to call _resignImplementation on the old implementation * @param becomeImplementationData The encoded bytes data to be passed to _becomeImplementation */ function _setImplementation(address implementation_, bool allowResign, bytes memory becomeImplementationData) public { require(msg.sender == admin, "CErc20Delegator::_setImplementation: Caller must be admin"); if (allowResign) { delegateToImplementation(abi.encodeWithSignature("_resignImplementation()")); } address oldImplementation = implementation; implementation = implementation_; delegateToImplementation(abi.encodeWithSignature("_becomeImplementation(bytes)", becomeImplementationData)); emit NewImplementation(oldImplementation, implementation); } /** * @notice Sender supplies assets into the market and receives cTokens in exchange * @dev Accrues interest whether or not the operation succeeds, unless reverted * @param mintAmount The amount of the underlying asset to supply * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function mint(uint mintAmount) external returns (uint) { mintAmount; // Shh delegateAndReturn(); } /** * @notice Sender redeems cTokens in exchange for the underlying asset * @dev Accrues interest whether or not the operation succeeds, unless reverted * @param redeemTokens The number of cTokens to redeem into underlying * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function redeem(uint redeemTokens) external returns (uint) { redeemTokens; // Shh delegateAndReturn(); } /** * @notice Sender redeems cTokens in exchange for a specified amount of underlying asset * @dev Accrues interest whether or not the operation succeeds, unless reverted * @param redeemAmount The amount of underlying to redeem * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function redeemUnderlying(uint redeemAmount) external returns (uint) { redeemAmount; // Shh delegateAndReturn(); } /** * @notice Sender borrows assets from the protocol to their own address * @param borrowAmount The amount of the underlying asset to borrow * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function borrow(uint borrowAmount) external returns (uint) { borrowAmount; // Shh delegateAndReturn(); } /** * @notice Sender repays their own borrow * @param repayAmount The amount to repay * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function repayBorrow(uint repayAmount) external returns (uint) { repayAmount; // Shh delegateAndReturn(); } /** * @notice Sender repays a borrow belonging to borrower * @param borrower the account with the debt being payed off * @param repayAmount The amount to repay * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function repayBorrowBehalf(address borrower, uint repayAmount) external returns (uint) { borrower; repayAmount; // Shh delegateAndReturn(); } /** * @notice The sender liquidates the borrowers collateral. * The collateral seized is transferred to the liquidator. * @param borrower The borrower of this cToken to be liquidated * @param cTokenCollateral The market in which to seize collateral from the borrower * @param repayAmount The amount of the underlying borrowed asset to repay * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function liquidateBorrow(address borrower, uint repayAmount, CTokenInterface cTokenCollateral) external returns (uint) { borrower; repayAmount; cTokenCollateral; // Shh delegateAndReturn(); } /** * @notice Transfer `amount` tokens from `msg.sender` to `dst` * @param dst The address of the destination account * @param amount The number of tokens to transfer * @return Whether or not the transfer succeeded */ function transfer(address dst, uint amount) external returns (bool) { dst; amount; // Shh delegateAndReturn(); } /** * @notice Transfer `amount` tokens from `src` to `dst` * @param src The address of the source account * @param dst The address of the destination account * @param amount The number of tokens to transfer * @return Whether or not the transfer succeeded */ function transferFrom(address src, address dst, uint256 amount) external returns (bool) { src; dst; amount; // Shh delegateAndReturn(); } /** * @notice Approve `spender` to transfer up to `amount` from `src` * @dev This will overwrite the approval amount for `spender` * and is subject to issues noted [here](https://eips.ethereum.org/EIPS/eip-20#approve) * @param spender The address of the account which may transfer tokens * @param amount The number of tokens that are approved (-1 means infinite) * @return Whether or not the approval succeeded */ function approve(address spender, uint256 amount) external returns (bool) { spender; amount; // Shh delegateAndReturn(); } /** * @notice Get the current allowance from `owner` for `spender` * @param owner The address of the account which owns the tokens to be spent * @param spender The address of the account which may transfer tokens * @return The number of tokens allowed to be spent (-1 means infinite) */ function allowance(address owner, address spender) external view returns (uint) { owner; spender; // Shh delegateToViewAndReturn(); } /** * @notice Get the token balance of the `owner` * @param owner The address of the account to query * @return The number of tokens owned by `owner` */ function balanceOf(address owner) external view returns (uint) { owner; // Shh delegateToViewAndReturn(); } /** * @notice Get the underlying balance of the `owner` * @dev This also accrues interest in a transaction * @param owner The address of the account to query * @return The amount of underlying owned by `owner` */ function balanceOfUnderlying(address owner) external returns (uint) { owner; // Shh delegateAndReturn(); } /** * @notice Get a snapshot of the account's balances, and the cached exchange rate * @dev This is used by comptroller to more efficiently perform liquidity checks. * @param account Address of the account to snapshot * @return (possible error, token balance, borrow balance, exchange rate mantissa) */ function getAccountSnapshot(address account) external view returns (uint, uint, uint, uint) { account; // Shh delegateToViewAndReturn(); } /** * @notice Returns the current per-block borrow interest rate for this cToken * @return The borrow interest rate per block, scaled by 1e18 */ function borrowRatePerBlock() external view returns (uint) { delegateToViewAndReturn(); } /** * @notice Returns the current per-block supply interest rate for this cToken * @return The supply interest rate per block, scaled by 1e18 */ function supplyRatePerBlock() external view returns (uint) { delegateToViewAndReturn(); } /** * @notice Returns the current total borrows plus accrued interest * @return The total borrows with interest */ function totalBorrowsCurrent() external returns (uint) { delegateAndReturn(); } /** * @notice Accrue interest to updated borrowIndex and then calculate account's borrow balance using the updated borrowIndex * @param account The address whose balance should be calculated after updating borrowIndex * @return The calculated balance */ function borrowBalanceCurrent(address account) external returns (uint) { account; // Shh delegateAndReturn(); } /** * @notice Return the borrow balance of account based on stored data * @param account The address whose balance should be calculated * @return The calculated balance */ function borrowBalanceStored(address account) public view returns (uint) { account; // Shh delegateToViewAndReturn(); } /** * @notice Accrue interest then return the up-to-date exchange rate * @return Calculated exchange rate scaled by 1e18 */ function exchangeRateCurrent() public returns (uint) { delegateAndReturn(); } /** * @notice Calculates the exchange rate from the underlying to the CToken * @dev This function does not accrue interest before calculating the exchange rate * @return Calculated exchange rate scaled by 1e18 */ function exchangeRateStored() public view returns (uint) { delegateToViewAndReturn(); } /** * @notice Get cash balance of this cToken in the underlying asset * @return The quantity of underlying asset owned by this contract */ function getCash() external view returns (uint) { delegateToViewAndReturn(); } /** * @notice Applies accrued interest to total borrows and reserves. * @dev This calculates interest accrued from the last checkpointed block * up to the current block and writes new checkpoint to storage. */ function accrueInterest() public returns (uint) { delegateAndReturn(); } /** * @notice Transfers collateral tokens (this market) to the liquidator. * @dev Will fail unless called by another cToken during the process of liquidation. * Its absolutely critical to use msg.sender as the borrowed cToken and not a parameter. * @param liquidator The account receiving seized collateral * @param borrower The account having collateral seized * @param seizeTokens The number of cTokens to seize * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function seize(address liquidator, address borrower, uint seizeTokens) external returns (uint) { liquidator; borrower; seizeTokens; // Shh delegateAndReturn(); } /*** Admin Functions ***/ /** * @notice Begins transfer of admin rights. The newPendingAdmin must call `_acceptAdmin` to finalize the transfer. * @dev Admin function to begin change of admin. The newPendingAdmin must call `_acceptAdmin` to finalize the transfer. * @param newPendingAdmin New pending admin. * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _setPendingAdmin(address payable newPendingAdmin) external returns (uint) { newPendingAdmin; // Shh delegateAndReturn(); } /** * @notice Sets a new comptroller for the market * @dev Admin function to set a new comptroller * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _setComptroller(ComptrollerInterface newComptroller) public returns (uint) { newComptroller; // Shh delegateAndReturn(); } /** * @notice accrues interest and sets a new reserve factor for the protocol using _setReserveFactorFresh * @dev Admin function to accrue interest and set a new reserve factor * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _setReserveFactor(uint newReserveFactorMantissa) external returns (uint) { newReserveFactorMantissa; // Shh delegateAndReturn(); } /** * @notice Accepts transfer of admin rights. msg.sender must be pendingAdmin * @dev Admin function for pending admin to accept role and update admin * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _acceptAdmin() external returns (uint) { delegateAndReturn(); } /** * @notice Accrues interest and adds reserves by transferring from admin * @param addAmount Amount of reserves to add * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _addReserves(uint addAmount) external returns (uint) { addAmount; // Shh delegateAndReturn(); } /** * @notice Accrues interest and reduces reserves by transferring to admin * @param reduceAmount Amount of reduction to reserves * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _reduceReserves(uint reduceAmount) external returns (uint) { reduceAmount; // Shh delegateAndReturn(); } /** * @notice Accrues interest and updates the interest rate model using _setInterestRateModelFresh * @dev Admin function to accrue interest and update the interest rate model * @param newInterestRateModel the new interest rate model to use * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _setInterestRateModel(InterestRateModel newInterestRateModel) public returns (uint) { newInterestRateModel; // Shh delegateAndReturn(); } /** * @notice Internal method to delegate execution to another contract * @dev It returns to the external caller whatever the implementation returns or forwards reverts * @param callee The contract to delegatecall * @param data The raw data to delegatecall * @return The returned bytes from the delegatecall */ function delegateTo(address callee, bytes memory data) internal returns (bytes memory) { (bool success, bytes memory returnData) = callee.delegatecall(data); assembly { if eq(success, 0) { revert(add(returnData, 0x20), returndatasize) } } return returnData; } /** * @notice Delegates execution to the implementation contract * @dev It returns to the external caller whatever the implementation returns or forwards reverts * @param data The raw data to delegatecall * @return The returned bytes from the delegatecall */ function delegateToImplementation(bytes memory data) public returns (bytes memory) { return delegateTo(implementation, data); } /** * @notice Delegates execution to an implementation contract * @dev It returns to the external caller whatever the implementation returns or forwards reverts * There are an additional 2 prefix uints from the wrapper returndata, which we ignore since we make an extra hop. * @param data The raw data to delegatecall * @return The returned bytes from the delegatecall */ function delegateToViewImplementation(bytes memory data) public view returns (bytes memory) { (bool success, bytes memory returnData) = address(this).staticcall(abi.encodeWithSignature("delegateToImplementation(bytes)", data)); assembly { if eq(success, 0) { revert(add(returnData, 0x20), returndatasize) } } return abi.decode(returnData, (bytes)); } function delegateToViewAndReturn() private view returns (bytes memory) { (bool success, ) = address(this).staticcall(abi.encodeWithSignature("delegateToImplementation(bytes)", msg.data)); assembly { let free_mem_ptr := mload(0x40) returndatacopy(free_mem_ptr, 0, returndatasize) switch success case 0 { revert(free_mem_ptr, returndatasize) } default { return(add(free_mem_ptr, 0x40), returndatasize) } } } function delegateAndReturn() private returns (bytes memory) { (bool success, ) = implementation.delegatecall(msg.data); assembly { let free_mem_ptr := mload(0x40) returndatacopy(free_mem_ptr, 0, returndatasize) switch success case 0 { revert(free_mem_ptr, returndatasize) } default { return(free_mem_ptr, returndatasize) } } } /** * @notice Delegates execution to an implementation contract * @dev It returns to the external caller whatever the implementation returns or forwards reverts */ function () external payable { require(msg.value == 0,"CErc20Delegator:fallback: cannot send value to fallback"); // delegate all other functions to current implementation delegateAndReturn(); } } contract CToken is CTokenInterface, Exponential, TokenErrorReporter { /** * @notice Initialize the money market * @param comptroller_ The address of the Comptroller * @param interestRateModel_ The address of the interest rate model * @param initialExchangeRateMantissa_ The initial exchange rate, scaled by 1e18 * @param name_ EIP-20 name of this token * @param symbol_ EIP-20 symbol of this token * @param decimals_ EIP-20 decimal precision of this token */ function initialize(ComptrollerInterface comptroller_, InterestRateModel interestRateModel_, uint initialExchangeRateMantissa_, string memory name_, string memory symbol_, uint8 decimals_) public { require(msg.sender == admin, "only admin may initialize the market"); require(accrualBlockNumber == 0 && borrowIndex == 0, "market may only be initialized once"); // Set initial exchange rate initialExchangeRateMantissa = initialExchangeRateMantissa_; require(initialExchangeRateMantissa > 0, "initial exchange rate must be greater than zero."); // Set the comptroller uint err = _setComptroller(comptroller_); require(err == uint(Error.NO_ERROR), "setting comptroller failed"); // Initialize block number and borrow index (block number mocks depend on comptroller being set) accrualBlockNumber = getBlockNumber(); borrowIndex = mantissaOne; // Set the interest rate model (depends on block number / borrow index) err = _setInterestRateModelFresh(interestRateModel_); require(err == uint(Error.NO_ERROR), "setting interest rate model failed"); name = name_; symbol = symbol_; decimals = decimals_; // The counter starts true to prevent changing it from zero to non-zero (i.e. smaller cost/refund) _notEntered = true; } /** * @notice Transfer `tokens` tokens from `src` to `dst` by `spender` * @dev Called by both `transfer` and `transferFrom` internally * @param spender The address of the account performing the transfer * @param src The address of the source account * @param dst The address of the destination account * @param tokens The number of tokens to transfer * @return Whether or not the transfer succeeded */ function transferTokens(address spender, address src, address dst, uint tokens) internal returns (uint) { /* Fail if transfer not allowed */ uint allowed = comptroller.transferAllowed(address(this), src, dst, tokens); if (allowed != 0) { return failOpaque(Error.COMPTROLLER_REJECTION, FailureInfo.TRANSFER_COMPTROLLER_REJECTION, allowed); } /* Do not allow self-transfers */ if (src == dst) { return fail(Error.BAD_INPUT, FailureInfo.TRANSFER_NOT_ALLOWED); } /* Get the allowance, infinite for the account owner */ uint startingAllowance = 0; if (spender == src) { startingAllowance = uint(-1); } else { startingAllowance = transferAllowances[src][spender]; } /* Do the calculations, checking for {under,over}flow */ MathError mathErr; uint allowanceNew; uint srcTokensNew; uint dstTokensNew; (mathErr, allowanceNew) = subUInt(startingAllowance, tokens); if (mathErr != MathError.NO_ERROR) { return fail(Error.MATH_ERROR, FailureInfo.TRANSFER_NOT_ALLOWED); } (mathErr, srcTokensNew) = subUInt(accountTokens[src], tokens); if (mathErr != MathError.NO_ERROR) { return fail(Error.MATH_ERROR, FailureInfo.TRANSFER_NOT_ENOUGH); } (mathErr, dstTokensNew) = addUInt(accountTokens[dst], tokens); if (mathErr != MathError.NO_ERROR) { return fail(Error.MATH_ERROR, FailureInfo.TRANSFER_TOO_MUCH); } ///////////////////////// // EFFECTS & INTERACTIONS // (No safe failures beyond this point) accountTokens[src] = srcTokensNew; accountTokens[dst] = dstTokensNew; /* Eat some of the allowance (if necessary) */ if (startingAllowance != uint(-1)) { transferAllowances[src][spender] = allowanceNew; } /* We emit a Transfer event */ emit Transfer(src, dst, tokens); comptroller.transferVerify(address(this), src, dst, tokens); return uint(Error.NO_ERROR); } /** * @notice Transfer `amount` tokens from `msg.sender` to `dst` * @param dst The address of the destination account * @param amount The number of tokens to transfer * @return Whether or not the transfer succeeded */ function transfer(address dst, uint256 amount) external nonReentrant returns (bool) { return transferTokens(msg.sender, msg.sender, dst, amount) == uint(Error.NO_ERROR); } /** * @notice Transfer `amount` tokens from `src` to `dst` * @param src The address of the source account * @param dst The address of the destination account * @param amount The number of tokens to transfer * @return Whether or not the transfer succeeded */ function transferFrom(address src, address dst, uint256 amount) external nonReentrant returns (bool) { return transferTokens(msg.sender, src, dst, amount) == uint(Error.NO_ERROR); } /** * @notice Approve `spender` to transfer up to `amount` from `src` * @dev This will overwrite the approval amount for `spender` * and is subject to issues noted [here](https://eips.ethereum.org/EIPS/eip-20#approve) * @param spender The address of the account which may transfer tokens * @param amount The number of tokens that are approved (-1 means infinite) * @return Whether or not the approval succeeded */ function approve(address spender, uint256 amount) external returns (bool) { address src = msg.sender; transferAllowances[src][spender] = amount; emit Approval(src, spender, amount); return true; } /** * @notice Get the current allowance from `owner` for `spender` * @param owner The address of the account which owns the tokens to be spent * @param spender The address of the account which may transfer tokens * @return The number of tokens allowed to be spent (-1 means infinite) */ function allowance(address owner, address spender) external view returns (uint256) { return transferAllowances[owner][spender]; } /** * @notice Get the token balance of the `owner` * @param owner The address of the account to query * @return The number of tokens owned by `owner` */ function balanceOf(address owner) external view returns (uint256) { return accountTokens[owner]; } /** * @notice Get the underlying balance of the `owner` * @dev This also accrues interest in a transaction * @param owner The address of the account to query * @return The amount of underlying owned by `owner` */ function balanceOfUnderlying(address owner) external returns (uint) { Exp memory exchangeRate = Exp({mantissa: exchangeRateCurrent()}); (MathError mErr, uint balance) = mulScalarTruncate(exchangeRate, accountTokens[owner]); require(mErr == MathError.NO_ERROR, "balance could not be calculated"); return balance; } /** * @notice Get a snapshot of the account's balances, and the cached exchange rate * @dev This is used by comptroller to more efficiently perform liquidity checks. * @param account Address of the account to snapshot * @return (possible error, token balance, borrow balance, exchange rate mantissa) */ function getAccountSnapshot(address account) external view returns (uint, uint, uint, uint) { uint cTokenBalance = accountTokens[account]; uint borrowBalance; uint exchangeRateMantissa; MathError mErr; (mErr, borrowBalance) = borrowBalanceStoredInternal(account); if (mErr != MathError.NO_ERROR) { return (uint(Error.MATH_ERROR), 0, 0, 0); } (mErr, exchangeRateMantissa) = exchangeRateStoredInternal(); if (mErr != MathError.NO_ERROR) { return (uint(Error.MATH_ERROR), 0, 0, 0); } return (uint(Error.NO_ERROR), cTokenBalance, borrowBalance, exchangeRateMantissa); } /** * @dev Function to simply retrieve block number * This exists mainly for inheriting test contracts to stub this result. */ function getBlockNumber() internal view returns (uint) { return block.number; } /** * @notice Returns the current per-block borrow interest rate for this cToken * @return The borrow interest rate per block, scaled by 1e18 */ function borrowRatePerBlock() external view returns (uint) { return interestRateModel.getBorrowRate(getCashPrior(), totalBorrows, totalReserves); } /** * @notice Returns the current per-block supply interest rate for this cToken * @return The supply interest rate per block, scaled by 1e18 */ function supplyRatePerBlock() external view returns (uint) { return interestRateModel.getSupplyRate(getCashPrior(), totalBorrows, totalReserves, reserveFactorMantissa); } /** * @notice Returns the current total borrows plus accrued interest * @return The total borrows with interest */ function totalBorrowsCurrent() external nonReentrant returns (uint) { require(accrueInterest() == uint(Error.NO_ERROR), "accrue interest failed"); return totalBorrows; } /** * @notice Accrue interest to updated borrowIndex and then calculate account's borrow balance using the updated borrowIndex * @param account The address whose balance should be calculated after updating borrowIndex * @return The calculated balance */ function borrowBalanceCurrent(address account) external nonReentrant returns (uint) { require(accrueInterest() == uint(Error.NO_ERROR), "accrue interest failed"); return borrowBalanceStored(account); } /** * @notice Return the borrow balance of account based on stored data * @param account The address whose balance should be calculated * @return The calculated balance */ function borrowBalanceStored(address account) public view returns (uint) { (MathError err, uint result) = borrowBalanceStoredInternal(account); require(err == MathError.NO_ERROR, "borrowBalanceStored: borrowBalanceStoredInternal failed"); return result; } /** * @notice Return the borrow balance of account based on stored data * @param account The address whose balance should be calculated * @return (error code, the calculated balance or 0 if error code is non-zero) */ function borrowBalanceStoredInternal(address account) internal view returns (MathError, uint) { /* Note: we do not assert that the market is up to date */ MathError mathErr; uint principalTimesIndex; uint result; /* Get borrowBalance and borrowIndex */ BorrowSnapshot storage borrowSnapshot = accountBorrows[account]; /* If borrowBalance = 0 then borrowIndex is likely also 0. * Rather than failing the calculation with a division by 0, we immediately return 0 in this case. */ if (borrowSnapshot.principal == 0) { return (MathError.NO_ERROR, 0); } /* Calculate new borrow balance using the interest index: * recentBorrowBalance = borrower.borrowBalance * market.borrowIndex / borrower.borrowIndex */ (mathErr, principalTimesIndex) = mulUInt(borrowSnapshot.principal, borrowIndex); if (mathErr != MathError.NO_ERROR) { return (mathErr, 0); } (mathErr, result) = divUInt(principalTimesIndex, borrowSnapshot.interestIndex); if (mathErr != MathError.NO_ERROR) { return (mathErr, 0); } return (MathError.NO_ERROR, result); } /** * @notice Accrue interest then return the up-to-date exchange rate * @return Calculated exchange rate scaled by 1e18 */ function exchangeRateCurrent() public nonReentrant returns (uint) { require(accrueInterest() == uint(Error.NO_ERROR), "accrue interest failed"); return exchangeRateStored(); } /** * @notice Calculates the exchange rate from the underlying to the CToken * @dev This function does not accrue interest before calculating the exchange rate * @return Calculated exchange rate scaled by 1e18 */ function exchangeRateStored() public view returns (uint) { (MathError err, uint result) = exchangeRateStoredInternal(); require(err == MathError.NO_ERROR, "exchangeRateStored: exchangeRateStoredInternal failed"); return result; } /** * @notice Calculates the exchange rate from the underlying to the CToken * @dev This function does not accrue interest before calculating the exchange rate * @return (error code, calculated exchange rate scaled by 1e18) */ function exchangeRateStoredInternal() internal view returns (MathError, uint) { uint _totalSupply = totalSupply; if (_totalSupply == 0) { /* * If there are no tokens minted: * exchangeRate = initialExchangeRate */ return (MathError.NO_ERROR, initialExchangeRateMantissa); } else { /* * Otherwise: * exchangeRate = (totalCash + totalBorrows - totalReserves) / totalSupply */ uint totalCash = getCashPrior(); uint cashPlusBorrowsMinusReserves; Exp memory exchangeRate; MathError mathErr; (mathErr, cashPlusBorrowsMinusReserves) = addThenSubUInt(totalCash, totalBorrows, totalReserves); if (mathErr != MathError.NO_ERROR) { return (mathErr, 0); } (mathErr, exchangeRate) = getExp(cashPlusBorrowsMinusReserves, _totalSupply); if (mathErr != MathError.NO_ERROR) { return (mathErr, 0); } return (MathError.NO_ERROR, exchangeRate.mantissa); } } /** * @notice Get cash balance of this cToken in the underlying asset * @return The quantity of underlying asset owned by this contract */ function getCash() external view returns (uint) { return getCashPrior(); } /** * @notice Applies accrued interest to total borrows and reserves * @dev This calculates interest accrued from the last checkpointed block * up to the current block and writes new checkpoint to storage. */ function accrueInterest() public returns (uint) { /* Remember the initial block number */ uint currentBlockNumber = getBlockNumber(); uint accrualBlockNumberPrior = accrualBlockNumber; /* Short-circuit accumulating 0 interest */ if (accrualBlockNumberPrior == currentBlockNumber) { return uint(Error.NO_ERROR); } /* Read the previous values out of storage */ uint cashPrior = getCashPrior(); uint borrowsPrior = totalBorrows; uint reservesPrior = totalReserves; uint borrowIndexPrior = borrowIndex; /* Calculate the current borrow interest rate */ uint borrowRateMantissa = interestRateModel.getBorrowRate(cashPrior, borrowsPrior, reservesPrior); require(borrowRateMantissa <= borrowRateMaxMantissa, "borrow rate is absurdly high"); /* Calculate the number of blocks elapsed since the last accrual */ (MathError mathErr, uint blockDelta) = subUInt(currentBlockNumber, accrualBlockNumberPrior); require(mathErr == MathError.NO_ERROR, "could not calculate block delta"); /* * Calculate the interest accumulated into borrows and reserves and the new index: * simpleInterestFactor = borrowRate * blockDelta * interestAccumulated = simpleInterestFactor * totalBorrows * totalBorrowsNew = interestAccumulated + totalBorrows * totalReservesNew = interestAccumulated * reserveFactor + totalReserves * borrowIndexNew = simpleInterestFactor * borrowIndex + borrowIndex */ Exp memory simpleInterestFactor; uint interestAccumulated; uint totalBorrowsNew; uint totalReservesNew; uint borrowIndexNew; (mathErr, simpleInterestFactor) = mulScalar(Exp({mantissa: borrowRateMantissa}), blockDelta); if (mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.ACCRUE_INTEREST_SIMPLE_INTEREST_FACTOR_CALCULATION_FAILED, uint(mathErr)); } (mathErr, interestAccumulated) = mulScalarTruncate(simpleInterestFactor, borrowsPrior); if (mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.ACCRUE_INTEREST_ACCUMULATED_INTEREST_CALCULATION_FAILED, uint(mathErr)); } (mathErr, totalBorrowsNew) = addUInt(interestAccumulated, borrowsPrior); if (mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.ACCRUE_INTEREST_NEW_TOTAL_BORROWS_CALCULATION_FAILED, uint(mathErr)); } (mathErr, totalReservesNew) = mulScalarTruncateAddUInt(Exp({mantissa: reserveFactorMantissa}), interestAccumulated, reservesPrior); if (mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.ACCRUE_INTEREST_NEW_TOTAL_RESERVES_CALCULATION_FAILED, uint(mathErr)); } (mathErr, borrowIndexNew) = mulScalarTruncateAddUInt(simpleInterestFactor, borrowIndexPrior, borrowIndexPrior); if (mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.ACCRUE_INTEREST_NEW_BORROW_INDEX_CALCULATION_FAILED, uint(mathErr)); } ///////////////////////// // EFFECTS & INTERACTIONS // (No safe failures beyond this point) /* We write the previously calculated values into storage */ accrualBlockNumber = currentBlockNumber; borrowIndex = borrowIndexNew; totalBorrows = totalBorrowsNew; totalReserves = totalReservesNew; /* We emit an AccrueInterest event */ emit AccrueInterest(cashPrior, interestAccumulated, borrowIndexNew, totalBorrowsNew); return uint(Error.NO_ERROR); } /** * @notice Sender supplies assets into the market and receives cTokens in exchange * @dev Accrues interest whether or not the operation succeeds, unless reverted * @param mintAmount The amount of the underlying asset to supply * @return (uint, uint) An error code (0=success, otherwise a failure, see ErrorReporter.sol), and the actual mint amount. */ function mintInternal(uint mintAmount) internal nonReentrant returns (uint, uint) { uint error = accrueInterest(); if (error != uint(Error.NO_ERROR)) { // accrueInterest emits logs on errors, but we still want to log the fact that an attempted borrow failed return (fail(Error(error), FailureInfo.MINT_ACCRUE_INTEREST_FAILED), 0); } // mintFresh emits the actual Mint event if successful and logs on errors, so we don't need to return mintFresh(msg.sender, mintAmount); } struct MintLocalVars { Error err; MathError mathErr; uint exchangeRateMantissa; uint mintTokens; uint totalSupplyNew; uint accountTokensNew; uint actualMintAmount; } /** * @notice User supplies assets into the market and receives cTokens in exchange * @dev Assumes interest has already been accrued up to the current block * @param minter The address of the account which is supplying the assets * @param mintAmount The amount of the underlying asset to supply * @return (uint, uint) An error code (0=success, otherwise a failure, see ErrorReporter.sol), and the actual mint amount. */ function mintFresh(address minter, uint mintAmount) internal returns (uint, uint) { /* Fail if mint not allowed */ uint allowed = comptroller.mintAllowed(address(this), minter, mintAmount); if (allowed != 0) { return (failOpaque(Error.COMPTROLLER_REJECTION, FailureInfo.MINT_COMPTROLLER_REJECTION, allowed), 0); } /* Verify market's block number equals current block number */ if (accrualBlockNumber != getBlockNumber()) { return (fail(Error.MARKET_NOT_FRESH, FailureInfo.MINT_FRESHNESS_CHECK), 0); } MintLocalVars memory vars; (vars.mathErr, vars.exchangeRateMantissa) = exchangeRateStoredInternal(); if (vars.mathErr != MathError.NO_ERROR) { return (failOpaque(Error.MATH_ERROR, FailureInfo.MINT_EXCHANGE_RATE_READ_FAILED, uint(vars.mathErr)), 0); } ///////////////////////// // EFFECTS & INTERACTIONS // (No safe failures beyond this point) /* * We call `doTransferIn` for the minter and the mintAmount. * Note: The cToken must handle variations between ERC-20 and ETH underlying. * `doTransferIn` reverts if anything goes wrong, since we can't be sure if * side-effects occurred. The function returns the amount actually transferred, * in case of a fee. On success, the cToken holds an additional `actualMintAmount` * of cash. */ vars.actualMintAmount = doTransferIn(minter, mintAmount); /* * We get the current exchange rate and calculate the number of cTokens to be minted: * mintTokens = actualMintAmount / exchangeRate */ (vars.mathErr, vars.mintTokens) = divScalarByExpTruncate(vars.actualMintAmount, Exp({mantissa: vars.exchangeRateMantissa})); require(vars.mathErr == MathError.NO_ERROR, "MINT_EXCHANGE_CALCULATION_FAILED"); /* * We calculate the new total supply of cTokens and minter token balance, checking for overflow: * totalSupplyNew = totalSupply + mintTokens * accountTokensNew = accountTokens[minter] + mintTokens */ (vars.mathErr, vars.totalSupplyNew) = addUInt(totalSupply, vars.mintTokens); require(vars.mathErr == MathError.NO_ERROR, "MINT_NEW_TOTAL_SUPPLY_CALCULATION_FAILED"); (vars.mathErr, vars.accountTokensNew) = addUInt(accountTokens[minter], vars.mintTokens); require(vars.mathErr == MathError.NO_ERROR, "MINT_NEW_ACCOUNT_BALANCE_CALCULATION_FAILED"); /* We write previously calculated values into storage */ totalSupply = vars.totalSupplyNew; accountTokens[minter] = vars.accountTokensNew; /* We emit a Mint event, and a Transfer event */ emit Mint(minter, vars.actualMintAmount, vars.mintTokens); emit Transfer(address(this), minter, vars.mintTokens); /* We call the defense hook */ comptroller.mintVerify(address(this), minter, vars.actualMintAmount, vars.mintTokens); return (uint(Error.NO_ERROR), vars.actualMintAmount); } /** * @notice Sender redeems cTokens in exchange for the underlying asset * @dev Accrues interest whether or not the operation succeeds, unless reverted * @param redeemTokens The number of cTokens to redeem into underlying * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function redeemInternal(uint redeemTokens) internal nonReentrant returns (uint) { uint error = accrueInterest(); if (error != uint(Error.NO_ERROR)) { // accrueInterest emits logs on errors, but we still want to log the fact that an attempted redeem failed return fail(Error(error), FailureInfo.REDEEM_ACCRUE_INTEREST_FAILED); } // redeemFresh emits redeem-specific logs on errors, so we don't need to return redeemFresh(msg.sender, redeemTokens, 0); } /** * @notice Sender redeems cTokens in exchange for a specified amount of underlying asset * @dev Accrues interest whether or not the operation succeeds, unless reverted * @param redeemAmount The amount of underlying to receive from redeeming cTokens * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function redeemUnderlyingInternal(uint redeemAmount) internal nonReentrant returns (uint) { uint error = accrueInterest(); if (error != uint(Error.NO_ERROR)) { // accrueInterest emits logs on errors, but we still want to log the fact that an attempted redeem failed return fail(Error(error), FailureInfo.REDEEM_ACCRUE_INTEREST_FAILED); } // redeemFresh emits redeem-specific logs on errors, so we don't need to return redeemFresh(msg.sender, 0, redeemAmount); } struct RedeemLocalVars { Error err; MathError mathErr; uint exchangeRateMantissa; uint redeemTokens; uint redeemAmount; uint totalSupplyNew; uint accountTokensNew; } /** * @notice User redeems cTokens in exchange for the underlying asset * @dev Assumes interest has already been accrued up to the current block * @param redeemer The address of the account which is redeeming the tokens * @param redeemTokensIn The number of cTokens to redeem into underlying (only one of redeemTokensIn or redeemAmountIn may be non-zero) * @param redeemAmountIn The number of underlying tokens to receive from redeeming cTokens (only one of redeemTokensIn or redeemAmountIn may be non-zero) * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function redeemFresh(address payable redeemer, uint redeemTokensIn, uint redeemAmountIn) internal returns (uint) { require(redeemTokensIn == 0 || redeemAmountIn == 0, "one of redeemTokensIn or redeemAmountIn must be zero"); RedeemLocalVars memory vars; /* exchangeRate = invoke Exchange Rate Stored() */ (vars.mathErr, vars.exchangeRateMantissa) = exchangeRateStoredInternal(); if (vars.mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.REDEEM_EXCHANGE_RATE_READ_FAILED, uint(vars.mathErr)); } /* If redeemTokensIn > 0: */ if (redeemTokensIn > 0) { /* * We calculate the exchange rate and the amount of underlying to be redeemed: * redeemTokens = redeemTokensIn * redeemAmount = redeemTokensIn x exchangeRateCurrent */ vars.redeemTokens = redeemTokensIn; (vars.mathErr, vars.redeemAmount) = mulScalarTruncate(Exp({mantissa: vars.exchangeRateMantissa}), redeemTokensIn); if (vars.mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.REDEEM_EXCHANGE_TOKENS_CALCULATION_FAILED, uint(vars.mathErr)); } } else { /* * We get the current exchange rate and calculate the amount to be redeemed: * redeemTokens = redeemAmountIn / exchangeRate * redeemAmount = redeemAmountIn */ (vars.mathErr, vars.redeemTokens) = divScalarByExpTruncate(redeemAmountIn, Exp({mantissa: vars.exchangeRateMantissa})); if (vars.mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.REDEEM_EXCHANGE_AMOUNT_CALCULATION_FAILED, uint(vars.mathErr)); } vars.redeemAmount = redeemAmountIn; } /* Fail if redeem not allowed */ uint allowed = comptroller.redeemAllowed(address(this), redeemer, vars.redeemTokens); if (allowed != 0) { return failOpaque(Error.COMPTROLLER_REJECTION, FailureInfo.REDEEM_COMPTROLLER_REJECTION, allowed); } /* Verify market's block number equals current block number */ if (accrualBlockNumber != getBlockNumber()) { return fail(Error.MARKET_NOT_FRESH, FailureInfo.REDEEM_FRESHNESS_CHECK); } /* * We calculate the new total supply and redeemer balance, checking for underflow: * totalSupplyNew = totalSupply - redeemTokens * accountTokensNew = accountTokens[redeemer] - redeemTokens */ (vars.mathErr, vars.totalSupplyNew) = subUInt(totalSupply, vars.redeemTokens); if (vars.mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.REDEEM_NEW_TOTAL_SUPPLY_CALCULATION_FAILED, uint(vars.mathErr)); } (vars.mathErr, vars.accountTokensNew) = subUInt(accountTokens[redeemer], vars.redeemTokens); if (vars.mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.REDEEM_NEW_ACCOUNT_BALANCE_CALCULATION_FAILED, uint(vars.mathErr)); } /* Fail gracefully if protocol has insufficient cash */ if (getCashPrior() < vars.redeemAmount) { return fail(Error.TOKEN_INSUFFICIENT_CASH, FailureInfo.REDEEM_TRANSFER_OUT_NOT_POSSIBLE); } ///////////////////////// // EFFECTS & INTERACTIONS // (No safe failures beyond this point) /* * We invoke doTransferOut for the redeemer and the redeemAmount. * Note: The cToken must handle variations between ERC-20 and ETH underlying. * On success, the cToken has redeemAmount less of cash. * doTransferOut reverts if anything goes wrong, since we can't be sure if side effects occurred. */ doTransferOut(redeemer, vars.redeemAmount); /* We write previously calculated values into storage */ totalSupply = vars.totalSupplyNew; accountTokens[redeemer] = vars.accountTokensNew; /* We emit a Transfer event, and a Redeem event */ emit Transfer(redeemer, address(this), vars.redeemTokens); emit Redeem(redeemer, vars.redeemAmount, vars.redeemTokens); /* We call the defense hook */ comptroller.redeemVerify(address(this), redeemer, vars.redeemAmount, vars.redeemTokens); return uint(Error.NO_ERROR); } /** * @notice Sender borrows assets from the protocol to their own address * @param borrowAmount The amount of the underlying asset to borrow * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function borrowInternal(uint borrowAmount) internal nonReentrant returns (uint) { uint error = accrueInterest(); if (error != uint(Error.NO_ERROR)) { // accrueInterest emits logs on errors, but we still want to log the fact that an attempted borrow failed return fail(Error(error), FailureInfo.BORROW_ACCRUE_INTEREST_FAILED); } // borrowFresh emits borrow-specific logs on errors, so we don't need to return borrowFresh(msg.sender, borrowAmount); } struct BorrowLocalVars { MathError mathErr; uint accountBorrows; uint accountBorrowsNew; uint totalBorrowsNew; } /** * @notice Users borrow assets from the protocol to their own address * @param borrowAmount The amount of the underlying asset to borrow * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function borrowFresh(address payable borrower, uint borrowAmount) internal returns (uint) { /* Fail if borrow not allowed */ uint allowed = comptroller.borrowAllowed(address(this), borrower, borrowAmount); if (allowed != 0) { return failOpaque(Error.COMPTROLLER_REJECTION, FailureInfo.BORROW_COMPTROLLER_REJECTION, allowed); } /* Verify market's block number equals current block number */ if (accrualBlockNumber != getBlockNumber()) { return fail(Error.MARKET_NOT_FRESH, FailureInfo.BORROW_FRESHNESS_CHECK); } /* Fail gracefully if protocol has insufficient underlying cash */ if (getCashPrior() < borrowAmount) { return fail(Error.TOKEN_INSUFFICIENT_CASH, FailureInfo.BORROW_CASH_NOT_AVAILABLE); } BorrowLocalVars memory vars; /* * We calculate the new borrower and total borrow balances, failing on overflow: * accountBorrowsNew = accountBorrows + borrowAmount * totalBorrowsNew = totalBorrows + borrowAmount */ (vars.mathErr, vars.accountBorrows) = borrowBalanceStoredInternal(borrower); if (vars.mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.BORROW_ACCUMULATED_BALANCE_CALCULATION_FAILED, uint(vars.mathErr)); } (vars.mathErr, vars.accountBorrowsNew) = addUInt(vars.accountBorrows, borrowAmount); if (vars.mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.BORROW_NEW_ACCOUNT_BORROW_BALANCE_CALCULATION_FAILED, uint(vars.mathErr)); } (vars.mathErr, vars.totalBorrowsNew) = addUInt(totalBorrows, borrowAmount); if (vars.mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.BORROW_NEW_TOTAL_BALANCE_CALCULATION_FAILED, uint(vars.mathErr)); } ///////////////////////// // EFFECTS & INTERACTIONS // (No safe failures beyond this point) /* * We invoke doTransferOut for the borrower and the borrowAmount. * Note: The cToken must handle variations between ERC-20 and ETH underlying. * On success, the cToken borrowAmount less of cash. * doTransferOut reverts if anything goes wrong, since we can't be sure if side effects occurred. */ doTransferOut(borrower, borrowAmount); /* We write the previously calculated values into storage */ accountBorrows[borrower].principal = vars.accountBorrowsNew; accountBorrows[borrower].interestIndex = borrowIndex; totalBorrows = vars.totalBorrowsNew; /* We emit a Borrow event */ emit Borrow(borrower, borrowAmount, vars.accountBorrowsNew, vars.totalBorrowsNew); /* We call the defense hook */ comptroller.borrowVerify(address(this), borrower, borrowAmount); return uint(Error.NO_ERROR); } /** * @notice Sender repays their own borrow * @param repayAmount The amount to repay * @return (uint, uint) An error code (0=success, otherwise a failure, see ErrorReporter.sol), and the actual repayment amount. */ function repayBorrowInternal(uint repayAmount) internal nonReentrant returns (uint, uint) { uint error = accrueInterest(); if (error != uint(Error.NO_ERROR)) { // accrueInterest emits logs on errors, but we still want to log the fact that an attempted borrow failed return (fail(Error(error), FailureInfo.REPAY_BORROW_ACCRUE_INTEREST_FAILED), 0); } // repayBorrowFresh emits repay-borrow-specific logs on errors, so we don't need to return repayBorrowFresh(msg.sender, msg.sender, repayAmount); } /** * @notice Sender repays a borrow belonging to borrower * @param borrower the account with the debt being payed off * @param repayAmount The amount to repay * @return (uint, uint) An error code (0=success, otherwise a failure, see ErrorReporter.sol), and the actual repayment amount. */ function repayBorrowBehalfInternal(address borrower, uint repayAmount) internal nonReentrant returns (uint, uint) { uint error = accrueInterest(); if (error != uint(Error.NO_ERROR)) { // accrueInterest emits logs on errors, but we still want to log the fact that an attempted borrow failed return (fail(Error(error), FailureInfo.REPAY_BEHALF_ACCRUE_INTEREST_FAILED), 0); } // repayBorrowFresh emits repay-borrow-specific logs on errors, so we don't need to return repayBorrowFresh(msg.sender, borrower, repayAmount); } struct RepayBorrowLocalVars { Error err; MathError mathErr; uint repayAmount; uint borrowerIndex; uint accountBorrows; uint accountBorrowsNew; uint totalBorrowsNew; uint actualRepayAmount; } /** * @notice Borrows are repaid by another user (possibly the borrower). * @param payer the account paying off the borrow * @param borrower the account with the debt being payed off * @param repayAmount the amount of undelrying tokens being returned * @return (uint, uint) An error code (0=success, otherwise a failure, see ErrorReporter.sol), and the actual repayment amount. */ function repayBorrowFresh(address payer, address borrower, uint repayAmount) internal returns (uint, uint) { /* Fail if repayBorrow not allowed */ uint allowed = comptroller.repayBorrowAllowed(address(this), payer, borrower, repayAmount); if (allowed != 0) { return (failOpaque(Error.COMPTROLLER_REJECTION, FailureInfo.REPAY_BORROW_COMPTROLLER_REJECTION, allowed), 0); } /* Verify market's block number equals current block number */ if (accrualBlockNumber != getBlockNumber()) { return (fail(Error.MARKET_NOT_FRESH, FailureInfo.REPAY_BORROW_FRESHNESS_CHECK), 0); } RepayBorrowLocalVars memory vars; /* We remember the original borrowerIndex for verification purposes */ vars.borrowerIndex = accountBorrows[borrower].interestIndex; /* We fetch the amount the borrower owes, with accumulated interest */ (vars.mathErr, vars.accountBorrows) = borrowBalanceStoredInternal(borrower); if (vars.mathErr != MathError.NO_ERROR) { return (failOpaque(Error.MATH_ERROR, FailureInfo.REPAY_BORROW_ACCUMULATED_BALANCE_CALCULATION_FAILED, uint(vars.mathErr)), 0); } /* If repayAmount == -1, repayAmount = accountBorrows */ if (repayAmount == uint(-1)) { vars.repayAmount = vars.accountBorrows; } else { vars.repayAmount = repayAmount; } ///////////////////////// // EFFECTS & INTERACTIONS // (No safe failures beyond this point) /* * We call doTransferIn for the payer and the repayAmount * Note: The cToken must handle variations between ERC-20 and ETH underlying. * On success, the cToken holds an additional repayAmount of cash. * doTransferIn reverts if anything goes wrong, since we can't be sure if side effects occurred. * it returns the amount actually transferred, in case of a fee. */ vars.actualRepayAmount = doTransferIn(payer, vars.repayAmount); /* * We calculate the new borrower and total borrow balances, failing on underflow: * accountBorrowsNew = accountBorrows - actualRepayAmount * totalBorrowsNew = totalBorrows - actualRepayAmount */ (vars.mathErr, vars.accountBorrowsNew) = subUInt(vars.accountBorrows, vars.actualRepayAmount); require(vars.mathErr == MathError.NO_ERROR, "REPAY_BORROW_NEW_ACCOUNT_BORROW_BALANCE_CALCULATION_FAILED"); (vars.mathErr, vars.totalBorrowsNew) = subUInt(totalBorrows, vars.actualRepayAmount); require(vars.mathErr == MathError.NO_ERROR, "REPAY_BORROW_NEW_TOTAL_BALANCE_CALCULATION_FAILED"); /* We write the previously calculated values into storage */ accountBorrows[borrower].principal = vars.accountBorrowsNew; accountBorrows[borrower].interestIndex = borrowIndex; totalBorrows = vars.totalBorrowsNew; /* We emit a RepayBorrow event */ emit RepayBorrow(payer, borrower, vars.actualRepayAmount, vars.accountBorrowsNew, vars.totalBorrowsNew); /* We call the defense hook */ comptroller.repayBorrowVerify(address(this), payer, borrower, vars.actualRepayAmount, vars.borrowerIndex); return (uint(Error.NO_ERROR), vars.actualRepayAmount); } /** * @notice The sender liquidates the borrowers collateral. * The collateral seized is transferred to the liquidator. * @param borrower The borrower of this cToken to be liquidated * @param cTokenCollateral The market in which to seize collateral from the borrower * @param repayAmount The amount of the underlying borrowed asset to repay * @return (uint, uint) An error code (0=success, otherwise a failure, see ErrorReporter.sol), and the actual repayment amount. */ function liquidateBorrowInternal(address borrower, uint repayAmount, CTokenInterface cTokenCollateral) internal nonReentrant returns (uint, uint) { uint error = accrueInterest(); if (error != uint(Error.NO_ERROR)) { // accrueInterest emits logs on errors, but we still want to log the fact that an attempted liquidation failed return (fail(Error(error), FailureInfo.LIQUIDATE_ACCRUE_BORROW_INTEREST_FAILED), 0); } error = cTokenCollateral.accrueInterest(); if (error != uint(Error.NO_ERROR)) { // accrueInterest emits logs on errors, but we still want to log the fact that an attempted liquidation failed return (fail(Error(error), FailureInfo.LIQUIDATE_ACCRUE_COLLATERAL_INTEREST_FAILED), 0); } // liquidateBorrowFresh emits borrow-specific logs on errors, so we don't need to return liquidateBorrowFresh(msg.sender, borrower, repayAmount, cTokenCollateral); } /** * @notice The liquidator liquidates the borrowers collateral. * The collateral seized is transferred to the liquidator. * @param borrower The borrower of this cToken to be liquidated * @param liquidator The address repaying the borrow and seizing collateral * @param cTokenCollateral The market in which to seize collateral from the borrower * @param repayAmount The amount of the underlying borrowed asset to repay * @return (uint, uint) An error code (0=success, otherwise a failure, see ErrorReporter.sol), and the actual repayment amount. */ function liquidateBorrowFresh(address liquidator, address borrower, uint repayAmount, CTokenInterface cTokenCollateral) internal returns (uint, uint) { /* Fail if liquidate not allowed */ uint allowed = comptroller.liquidateBorrowAllowed(address(this), address(cTokenCollateral), liquidator, borrower, repayAmount); if (allowed != 0) { return (failOpaque(Error.COMPTROLLER_REJECTION, FailureInfo.LIQUIDATE_COMPTROLLER_REJECTION, allowed), 0); } /* Verify market's block number equals current block number */ if (accrualBlockNumber != getBlockNumber()) { return (fail(Error.MARKET_NOT_FRESH, FailureInfo.LIQUIDATE_FRESHNESS_CHECK), 0); } /* Verify cTokenCollateral market's block number equals current block number */ if (cTokenCollateral.accrualBlockNumber() != getBlockNumber()) { return (fail(Error.MARKET_NOT_FRESH, FailureInfo.LIQUIDATE_COLLATERAL_FRESHNESS_CHECK), 0); } /* Fail if borrower = liquidator */ if (borrower == liquidator) { return (fail(Error.INVALID_ACCOUNT_PAIR, FailureInfo.LIQUIDATE_LIQUIDATOR_IS_BORROWER), 0); } /* Fail if repayAmount = 0 */ if (repayAmount == 0) { return (fail(Error.INVALID_CLOSE_AMOUNT_REQUESTED, FailureInfo.LIQUIDATE_CLOSE_AMOUNT_IS_ZERO), 0); } /* Fail if repayAmount = -1 */ if (repayAmount == uint(-1)) { return (fail(Error.INVALID_CLOSE_AMOUNT_REQUESTED, FailureInfo.LIQUIDATE_CLOSE_AMOUNT_IS_UINT_MAX), 0); } /* Fail if repayBorrow fails */ (uint repayBorrowError, uint actualRepayAmount) = repayBorrowFresh(liquidator, borrower, repayAmount); if (repayBorrowError != uint(Error.NO_ERROR)) { return (fail(Error(repayBorrowError), FailureInfo.LIQUIDATE_REPAY_BORROW_FRESH_FAILED), 0); } ///////////////////////// // EFFECTS & INTERACTIONS // (No safe failures beyond this point) /* We calculate the number of collateral tokens that will be seized */ (uint amountSeizeError, uint seizeTokens) = comptroller.liquidateCalculateSeizeTokens(address(this), address(cTokenCollateral), actualRepayAmount); require(amountSeizeError == uint(Error.NO_ERROR), "LIQUIDATE_COMPTROLLER_CALCULATE_AMOUNT_SEIZE_FAILED"); /* Revert if borrower collateral token balance < seizeTokens */ require(cTokenCollateral.balanceOf(borrower) >= seizeTokens, "LIQUIDATE_SEIZE_TOO_MUCH"); // If this is also the collateral, run seizeInternal to avoid re-entrancy, otherwise make an external call uint seizeError; if (address(cTokenCollateral) == address(this)) { seizeError = seizeInternal(address(this), liquidator, borrower, seizeTokens); } else { seizeError = cTokenCollateral.seize(liquidator, borrower, seizeTokens); } /* Revert if seize tokens fails (since we cannot be sure of side effects) */ require(seizeError == uint(Error.NO_ERROR), "token seizure failed"); /* We emit a LiquidateBorrow event */ emit LiquidateBorrow(liquidator, borrower, actualRepayAmount, address(cTokenCollateral), seizeTokens); /* We call the defense hook */ comptroller.liquidateBorrowVerify(address(this), address(cTokenCollateral), liquidator, borrower, actualRepayAmount, seizeTokens); return (uint(Error.NO_ERROR), actualRepayAmount); } /** * @notice Transfers collateral tokens (this market) to the liquidator. * @dev Will fail unless called by another cToken during the process of liquidation. * Its absolutely critical to use msg.sender as the borrowed cToken and not a parameter. * @param liquidator The account receiving seized collateral * @param borrower The account having collateral seized * @param seizeTokens The number of cTokens to seize * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function seize(address liquidator, address borrower, uint seizeTokens) external nonReentrant returns (uint) { return seizeInternal(msg.sender, liquidator, borrower, seizeTokens); } /** * @notice Transfers collateral tokens (this market) to the liquidator. * @dev Called only during an in-kind liquidation, or by liquidateBorrow during the liquidation of another CToken. * Its absolutely critical to use msg.sender as the seizer cToken and not a parameter. * @param seizerToken The contract seizing the collateral (i.e. borrowed cToken) * @param liquidator The account receiving seized collateral * @param borrower The account having collateral seized * @param seizeTokens The number of cTokens to seize * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function seizeInternal(address seizerToken, address liquidator, address borrower, uint seizeTokens) internal returns (uint) { /* Fail if seize not allowed */ uint allowed = comptroller.seizeAllowed(address(this), seizerToken, liquidator, borrower, seizeTokens); if (allowed != 0) { return failOpaque(Error.COMPTROLLER_REJECTION, FailureInfo.LIQUIDATE_SEIZE_COMPTROLLER_REJECTION, allowed); } /* Fail if borrower = liquidator */ if (borrower == liquidator) { return fail(Error.INVALID_ACCOUNT_PAIR, FailureInfo.LIQUIDATE_SEIZE_LIQUIDATOR_IS_BORROWER); } MathError mathErr; uint borrowerTokensNew; uint liquidatorTokensNew; /* * We calculate the new borrower and liquidator token balances, failing on underflow/overflow: * borrowerTokensNew = accountTokens[borrower] - seizeTokens * liquidatorTokensNew = accountTokens[liquidator] + seizeTokens */ (mathErr, borrowerTokensNew) = subUInt(accountTokens[borrower], seizeTokens); if (mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.LIQUIDATE_SEIZE_BALANCE_DECREMENT_FAILED, uint(mathErr)); } (mathErr, liquidatorTokensNew) = addUInt(accountTokens[liquidator], seizeTokens); if (mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.LIQUIDATE_SEIZE_BALANCE_INCREMENT_FAILED, uint(mathErr)); } ///////////////////////// // EFFECTS & INTERACTIONS // (No safe failures beyond this point) /* We write the previously calculated values into storage */ accountTokens[borrower] = borrowerTokensNew; accountTokens[liquidator] = liquidatorTokensNew; /* Emit a Transfer event */ emit Transfer(borrower, liquidator, seizeTokens); /* We call the defense hook */ comptroller.seizeVerify(address(this), seizerToken, liquidator, borrower, seizeTokens); return uint(Error.NO_ERROR); } /*** Admin Functions ***/ /** * @notice Begins transfer of admin rights. The newPendingAdmin must call `_acceptAdmin` to finalize the transfer. * @dev Admin function to begin change of admin. The newPendingAdmin must call `_acceptAdmin` to finalize the transfer. * @param newPendingAdmin New pending admin. * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _setPendingAdmin(address payable newPendingAdmin) external returns (uint) { // Check caller = admin if (msg.sender != admin) { return fail(Error.UNAUTHORIZED, FailureInfo.SET_PENDING_ADMIN_OWNER_CHECK); } // Save current value, if any, for inclusion in log address oldPendingAdmin = pendingAdmin; // Store pendingAdmin with value newPendingAdmin pendingAdmin = newPendingAdmin; // Emit NewPendingAdmin(oldPendingAdmin, newPendingAdmin) emit NewPendingAdmin(oldPendingAdmin, newPendingAdmin); return uint(Error.NO_ERROR); } /** * @notice Accepts transfer of admin rights. msg.sender must be pendingAdmin * @dev Admin function for pending admin to accept role and update admin * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _acceptAdmin() external returns (uint) { // Check caller is pendingAdmin and pendingAdmin ≠ address(0) if (msg.sender != pendingAdmin || msg.sender == address(0)) { return fail(Error.UNAUTHORIZED, FailureInfo.ACCEPT_ADMIN_PENDING_ADMIN_CHECK); } // Save current values for inclusion in log address oldAdmin = admin; address oldPendingAdmin = pendingAdmin; // Store admin with value pendingAdmin admin = pendingAdmin; // Clear the pending value pendingAdmin = address(0); emit NewAdmin(oldAdmin, admin); emit NewPendingAdmin(oldPendingAdmin, pendingAdmin); return uint(Error.NO_ERROR); } /** * @notice Sets a new comptroller for the market * @dev Admin function to set a new comptroller * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _setComptroller(ComptrollerInterface newComptroller) public returns (uint) { // Check caller is admin if (msg.sender != admin) { return fail(Error.UNAUTHORIZED, FailureInfo.SET_COMPTROLLER_OWNER_CHECK); } ComptrollerInterface oldComptroller = comptroller; // Ensure invoke comptroller.isComptroller() returns true require(newComptroller.isComptroller(), "marker method returned false"); // Set market's comptroller to newComptroller comptroller = newComptroller; // Emit NewComptroller(oldComptroller, newComptroller) emit NewComptroller(oldComptroller, newComptroller); return uint(Error.NO_ERROR); } /** * @notice accrues interest and sets a new reserve factor for the protocol using _setReserveFactorFresh * @dev Admin function to accrue interest and set a new reserve factor * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _setReserveFactor(uint newReserveFactorMantissa) external nonReentrant returns (uint) { uint error = accrueInterest(); if (error != uint(Error.NO_ERROR)) { // accrueInterest emits logs on errors, but on top of that we want to log the fact that an attempted reserve factor change failed. return fail(Error(error), FailureInfo.SET_RESERVE_FACTOR_ACCRUE_INTEREST_FAILED); } // _setReserveFactorFresh emits reserve-factor-specific logs on errors, so we don't need to. return _setReserveFactorFresh(newReserveFactorMantissa); } /** * @notice Sets a new reserve factor for the protocol (*requires fresh interest accrual) * @dev Admin function to set a new reserve factor * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _setReserveFactorFresh(uint newReserveFactorMantissa) internal returns (uint) { // Check caller is admin if (msg.sender != admin) { return fail(Error.UNAUTHORIZED, FailureInfo.SET_RESERVE_FACTOR_ADMIN_CHECK); } // Verify market's block number equals current block number if (accrualBlockNumber != getBlockNumber()) { return fail(Error.MARKET_NOT_FRESH, FailureInfo.SET_RESERVE_FACTOR_FRESH_CHECK); } // Check newReserveFactor ≤ maxReserveFactor if (newReserveFactorMantissa > reserveFactorMaxMantissa) { return fail(Error.BAD_INPUT, FailureInfo.SET_RESERVE_FACTOR_BOUNDS_CHECK); } uint oldReserveFactorMantissa = reserveFactorMantissa; reserveFactorMantissa = newReserveFactorMantissa; emit NewReserveFactor(oldReserveFactorMantissa, newReserveFactorMantissa); return uint(Error.NO_ERROR); } /** * @notice Accrues interest and reduces reserves by transferring from msg.sender * @param addAmount Amount of addition to reserves * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _addReservesInternal(uint addAmount) internal nonReentrant returns (uint) { uint error = accrueInterest(); if (error != uint(Error.NO_ERROR)) { // accrueInterest emits logs on errors, but on top of that we want to log the fact that an attempted reduce reserves failed. return fail(Error(error), FailureInfo.ADD_RESERVES_ACCRUE_INTEREST_FAILED); } // _addReservesFresh emits reserve-addition-specific logs on errors, so we don't need to. (error, ) = _addReservesFresh(addAmount); return error; } /** * @notice Add reserves by transferring from caller * @dev Requires fresh interest accrual * @param addAmount Amount of addition to reserves * @return (uint, uint) An error code (0=success, otherwise a failure (see ErrorReporter.sol for details)) and the actual amount added, net token fees */ function _addReservesFresh(uint addAmount) internal returns (uint, uint) { // totalReserves + actualAddAmount uint totalReservesNew; uint actualAddAmount; // We fail gracefully unless market's block number equals current block number if (accrualBlockNumber != getBlockNumber()) { return (fail(Error.MARKET_NOT_FRESH, FailureInfo.ADD_RESERVES_FRESH_CHECK), actualAddAmount); } ///////////////////////// // EFFECTS & INTERACTIONS // (No safe failures beyond this point) /* * We call doTransferIn for the caller and the addAmount * Note: The cToken must handle variations between ERC-20 and ETH underlying. * On success, the cToken holds an additional addAmount of cash. * doTransferIn reverts if anything goes wrong, since we can't be sure if side effects occurred. * it returns the amount actually transferred, in case of a fee. */ actualAddAmount = doTransferIn(msg.sender, addAmount); totalReservesNew = totalReserves + actualAddAmount; /* Revert on overflow */ require(totalReservesNew >= totalReserves, "add reserves unexpected overflow"); // Store reserves[n+1] = reserves[n] + actualAddAmount totalReserves = totalReservesNew; /* Emit NewReserves(admin, actualAddAmount, reserves[n+1]) */ emit ReservesAdded(msg.sender, actualAddAmount, totalReservesNew); /* Return (NO_ERROR, actualAddAmount) */ return (uint(Error.NO_ERROR), actualAddAmount); } /** * @notice Accrues interest and reduces reserves by transferring to admin * @param reduceAmount Amount of reduction to reserves * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _reduceReserves(uint reduceAmount) external nonReentrant returns (uint) { uint error = accrueInterest(); if (error != uint(Error.NO_ERROR)) { // accrueInterest emits logs on errors, but on top of that we want to log the fact that an attempted reduce reserves failed. return fail(Error(error), FailureInfo.REDUCE_RESERVES_ACCRUE_INTEREST_FAILED); } // _reduceReservesFresh emits reserve-reduction-specific logs on errors, so we don't need to. return _reduceReservesFresh(reduceAmount); } /** * @notice Reduces reserves by transferring to admin * @dev Requires fresh interest accrual * @param reduceAmount Amount of reduction to reserves * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _reduceReservesFresh(uint reduceAmount) internal returns (uint) { // totalReserves - reduceAmount uint totalReservesNew; // Check caller is admin if (msg.sender != admin) { return fail(Error.UNAUTHORIZED, FailureInfo.REDUCE_RESERVES_ADMIN_CHECK); } // We fail gracefully unless market's block number equals current block number if (accrualBlockNumber != getBlockNumber()) { return fail(Error.MARKET_NOT_FRESH, FailureInfo.REDUCE_RESERVES_FRESH_CHECK); } // Fail gracefully if protocol has insufficient underlying cash if (getCashPrior() < reduceAmount) { return fail(Error.TOKEN_INSUFFICIENT_CASH, FailureInfo.REDUCE_RESERVES_CASH_NOT_AVAILABLE); } // Check reduceAmount ≤ reserves[n] (totalReserves) if (reduceAmount > totalReserves) { return fail(Error.BAD_INPUT, FailureInfo.REDUCE_RESERVES_VALIDATION); } ///////////////////////// // EFFECTS & INTERACTIONS // (No safe failures beyond this point) totalReservesNew = totalReserves - reduceAmount; // We checked reduceAmount <= totalReserves above, so this should never revert. require(totalReservesNew <= totalReserves, "reduce reserves unexpected underflow"); // Store reserves[n+1] = reserves[n] - reduceAmount totalReserves = totalReservesNew; // doTransferOut reverts if anything goes wrong, since we can't be sure if side effects occurred. doTransferOut(admin, reduceAmount); emit ReservesReduced(admin, reduceAmount, totalReservesNew); return uint(Error.NO_ERROR); } /** * @notice accrues interest and updates the interest rate model using _setInterestRateModelFresh * @dev Admin function to accrue interest and update the interest rate model * @param newInterestRateModel the new interest rate model to use * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _setInterestRateModel(InterestRateModel newInterestRateModel) public returns (uint) { uint error = accrueInterest(); if (error != uint(Error.NO_ERROR)) { // accrueInterest emits logs on errors, but on top of that we want to log the fact that an attempted change of interest rate model failed return fail(Error(error), FailureInfo.SET_INTEREST_RATE_MODEL_ACCRUE_INTEREST_FAILED); } // _setInterestRateModelFresh emits interest-rate-model-update-specific logs on errors, so we don't need to. return _setInterestRateModelFresh(newInterestRateModel); } /** * @notice updates the interest rate model (*requires fresh interest accrual) * @dev Admin function to update the interest rate model * @param newInterestRateModel the new interest rate model to use * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _setInterestRateModelFresh(InterestRateModel newInterestRateModel) internal returns (uint) { // Used to store old model for use in the event that is emitted on success InterestRateModel oldInterestRateModel; // Check caller is admin if (msg.sender != admin) { return fail(Error.UNAUTHORIZED, FailureInfo.SET_INTEREST_RATE_MODEL_OWNER_CHECK); } // We fail gracefully unless market's block number equals current block number if (accrualBlockNumber != getBlockNumber()) { return fail(Error.MARKET_NOT_FRESH, FailureInfo.SET_INTEREST_RATE_MODEL_FRESH_CHECK); } // Track the market's current interest rate model oldInterestRateModel = interestRateModel; // Ensure invoke newInterestRateModel.isInterestRateModel() returns true require(newInterestRateModel.isInterestRateModel(), "marker method returned false"); // Set the interest rate model to newInterestRateModel interestRateModel = newInterestRateModel; // Emit NewMarketInterestRateModel(oldInterestRateModel, newInterestRateModel) emit NewMarketInterestRateModel(oldInterestRateModel, newInterestRateModel); return uint(Error.NO_ERROR); } /*** Safe Token ***/ /** * @notice Gets balance of this contract in terms of the underlying * @dev This excludes the value of the current message, if any * @return The quantity of underlying owned by this contract */ function getCashPrior() internal view returns (uint); /** * @dev Performs a transfer in, reverting upon failure. Returns the amount actually transferred to the protocol, in case of a fee. * This may revert due to insufficient balance or insufficient allowance. */ function doTransferIn(address from, uint amount) internal returns (uint); /** * @dev Performs a transfer out, ideally returning an explanatory error code upon failure tather than reverting. * If caller has not called checked protocol's balance, may revert due to insufficient cash held in the contract. * If caller has checked protocol's balance, and verified it is >= amount, this should not revert in normal conditions. */ function doTransferOut(address payable to, uint amount) internal; /*** Reentrancy Guard ***/ /** * @dev Prevents a contract from calling itself, directly or indirectly. */ modifier nonReentrant() { require(_notEntered, "re-entered"); _notEntered = false; _; _notEntered = true; // get a gas-refund post-Istanbul } } contract Comptroller is ComptrollerV3Storage, ComptrollerInterface, ComptrollerErrorReporter, Exponential { /// @notice Emitted when an admin supports a market event MarketListed(CToken cToken); /// @notice Emitted when an account enters a market event MarketEntered(CToken cToken, address account); /// @notice Emitted when an account exits a market event MarketExited(CToken cToken, address account); /// @notice Emitted when close factor is changed by admin event NewCloseFactor(uint oldCloseFactorMantissa, uint newCloseFactorMantissa); /// @notice Emitted when a collateral factor is changed by admin event NewCollateralFactor(CToken cToken, uint oldCollateralFactorMantissa, uint newCollateralFactorMantissa); /// @notice Emitted when liquidation incentive is changed by admin event NewLiquidationIncentive(uint oldLiquidationIncentiveMantissa, uint newLiquidationIncentiveMantissa); /// @notice Emitted when maxAssets is changed by admin event NewMaxAssets(uint oldMaxAssets, uint newMaxAssets); /// @notice Emitted when price oracle is changed event NewPriceOracle(PriceOracle oldPriceOracle, PriceOracle newPriceOracle); /// @notice Emitted when pause guardian is changed event NewPauseGuardian(address oldPauseGuardian, address newPauseGuardian); /// @notice Emitted when an action is paused globally event ActionPaused(string action, bool pauseState); /// @notice Emitted when an action is paused on a market event MarketActionPaused(CToken cToken, string action, bool pauseState); /// @notice Emitted when market comped status is changed event MarketComped(CToken cToken, bool isComped); /// @notice Emitted when COMP rate is changed event NewCompRate(uint oldCompRate, uint newCompRate); /// @notice Emitted when a new COMP speed is calculated for a market event CompSpeedUpdated(CToken indexed cToken, uint newSpeed, uint totalUtility, uint utility); /// @notice Emitted when COMP is distributed to a supplier event DistributedSupplierComp(CToken indexed cToken, address indexed supplier, uint compDelta, uint compSupplyIndex); /// @notice Emitted when COMP is distributed to a borrower event DistributedBorrowerComp(CToken indexed cToken, address indexed borrower, uint compDelta, uint compBorrowIndex); /// @notice The threshold above which the flywheel transfers COMP, in wei //uint public constant compClaimThreshold = 0.001e18; uint public constant compClaimThreshold = 1e18; /// @notice The initial COMP index for a market uint224 public constant compInitialIndex = 1e36; // closeFactorMantissa must be strictly greater than this value uint internal constant closeFactorMinMantissa = 0.05e18; // 0.05 // closeFactorMantissa must not exceed this value uint internal constant closeFactorMaxMantissa = 0.9e18; // 0.9 // No collateralFactorMantissa may exceed this value uint internal constant collateralFactorMaxMantissa = 0.9e18; // 0.9 // liquidationIncentiveMantissa must be no less than this value uint internal constant liquidationIncentiveMinMantissa = 1.0e18; // 1.0 // liquidationIncentiveMantissa must be no greater than this value uint internal constant liquidationIncentiveMaxMantissa = 1.5e18; // 1.5 constructor() public { admin = msg.sender; } /*** Assets You Are In ***/ /** * @notice Returns the assets an account has entered * @param account The address of the account to pull assets for * @return A dynamic list with the assets the account has entered */ function getAssetsIn(address account) external view returns (CToken[] memory) { CToken[] memory assetsIn = accountAssets[account]; return assetsIn; } /** * @notice Returns whether the given account is entered in the given asset * @param account The address of the account to check * @param cToken The cToken to check * @return True if the account is in the asset, otherwise false. */ function checkMembership(address account, CToken cToken) external view returns (bool) { return markets[address(cToken)].accountMembership[account]; } /** * @notice Add assets to be included in account liquidity calculation * @param cTokens The list of addresses of the cToken markets to be enabled * @return Success indicator for whether each corresponding market was entered */ function enterMarkets(address[] memory cTokens) public returns (uint[] memory) { uint len = cTokens.length; uint[] memory results = new uint[](len); for (uint i = 0; i < len; i++) { CToken cToken = CToken(cTokens[i]); results[i] = uint(addToMarketInternal(cToken, msg.sender)); } return results; } /** * @notice Add the market to the borrower's "assets in" for liquidity calculations * @param cToken The market to enter * @param borrower The address of the account to modify * @return Success indicator for whether the market was entered */ function addToMarketInternal(CToken cToken, address borrower) internal returns (Error) { Market storage marketToJoin = markets[address(cToken)]; if (!marketToJoin.isListed) { // market is not listed, cannot join return Error.MARKET_NOT_LISTED; } if (marketToJoin.accountMembership[borrower] == true) { // already joined return Error.NO_ERROR; } if (accountAssets[borrower].length >= maxAssets) { // no space, cannot join return Error.TOO_MANY_ASSETS; } // survived the gauntlet, add to list // NOTE: we store these somewhat redundantly as a significant optimization // this avoids having to iterate through the list for the most common use cases // that is, only when we need to perform liquidity checks // and not whenever we want to check if an account is in a particular market marketToJoin.accountMembership[borrower] = true; accountAssets[borrower].push(cToken); emit MarketEntered(cToken, borrower); return Error.NO_ERROR; } /** * @notice Removes asset from sender's account liquidity calculation * @dev Sender must not have an outstanding borrow balance in the asset, * or be providing necessary collateral for an outstanding borrow. * @param cTokenAddress The address of the asset to be removed * @return Whether or not the account successfully exited the market */ function exitMarket(address cTokenAddress) external returns (uint) { CToken cToken = CToken(cTokenAddress); /* Get sender tokensHeld and amountOwed underlying from the cToken */ (uint oErr, uint tokensHeld, uint amountOwed,) = cToken.getAccountSnapshot(msg.sender); require(oErr == 0, "exitMarket: getAccountSnapshot failed"); // semi-opaque error code /* Fail if the sender has a borrow balance */ if (amountOwed != 0) { return fail(Error.NONZERO_BORROW_BALANCE, FailureInfo.EXIT_MARKET_BALANCE_OWED); } /* Fail if the sender is not permitted to redeem all of their tokens */ uint allowed = redeemAllowedInternal(cTokenAddress, msg.sender, tokensHeld); if (allowed != 0) { return failOpaque(Error.REJECTION, FailureInfo.EXIT_MARKET_REJECTION, allowed); } Market storage marketToExit = markets[address(cToken)]; /* Return true if the sender is not already ‘in’ the market */ if (!marketToExit.accountMembership[msg.sender]) { return uint(Error.NO_ERROR); } /* Set cToken account membership to false */ delete marketToExit.accountMembership[msg.sender]; /* Delete cToken from the account’s list of assets */ // load into memory for faster iteration CToken[] memory userAssetList = accountAssets[msg.sender]; uint len = userAssetList.length; uint assetIndex = len; for (uint i = 0; i < len; i++) { if (userAssetList[i] == cToken) { assetIndex = i; break; } } // We *must* have found the asset in the list or our redundant data structure is broken assert(assetIndex < len); // copy last item in list to location of item to be removed, reduce length by 1 CToken[] storage storedList = accountAssets[msg.sender]; storedList[assetIndex] = storedList[storedList.length - 1]; storedList.length--; emit MarketExited(cToken, msg.sender); return uint(Error.NO_ERROR); } /*** Policy Hooks ***/ /** * @notice Checks if the account should be allowed to mint tokens in the given market * @param cToken The market to verify the mint against * @param minter The account which would get the minted tokens * @param mintAmount The amount of underlying being supplied to the market in exchange for tokens * @return 0 if the mint is allowed, otherwise a semi-opaque error code (See ErrorReporter.sol) */ function mintAllowed(address cToken, address minter, uint mintAmount) external returns (uint) { // Pausing is a very serious situation - we revert to sound the alarms require(!mintGuardianPaused[cToken], "mint is paused"); // Shh - currently unused minter; mintAmount; if (!markets[cToken].isListed) { return uint(Error.MARKET_NOT_LISTED); } // Keep the flywheel moving updateCompSupplyIndex(cToken); distributeSupplierComp(cToken, minter, false); return uint(Error.NO_ERROR); } /** * @notice Validates mint and reverts on rejection. May emit logs. * @param cToken Asset being minted * @param minter The address minting the tokens * @param actualMintAmount The amount of the underlying asset being minted * @param mintTokens The number of tokens being minted */ function mintVerify(address cToken, address minter, uint actualMintAmount, uint mintTokens) external { // Shh - currently unused cToken; minter; actualMintAmount; mintTokens; // Shh - we don't ever want this hook to be marked pure if (false) { maxAssets = maxAssets; } } /** * @notice Checks if the account should be allowed to redeem tokens in the given market * @param cToken The market to verify the redeem against * @param redeemer The account which would redeem the tokens * @param redeemTokens The number of cTokens to exchange for the underlying asset in the market * @return 0 if the redeem is allowed, otherwise a semi-opaque error code (See ErrorReporter.sol) */ function redeemAllowed(address cToken, address redeemer, uint redeemTokens) external returns (uint) { uint allowed = redeemAllowedInternal(cToken, redeemer, redeemTokens); if (allowed != uint(Error.NO_ERROR)) { return allowed; } // Keep the flywheel moving updateCompSupplyIndex(cToken); distributeSupplierComp(cToken, redeemer, false); return uint(Error.NO_ERROR); } function redeemAllowedInternal(address cToken, address redeemer, uint redeemTokens) internal view returns (uint) { if (!markets[cToken].isListed) { return uint(Error.MARKET_NOT_LISTED); } /* If the redeemer is not 'in' the market, then we can bypass the liquidity check */ if (!markets[cToken].accountMembership[redeemer]) { return uint(Error.NO_ERROR); } /* Otherwise, perform a hypothetical liquidity check to guard against shortfall */ (Error err, , uint shortfall) = getHypotheticalAccountLiquidityInternal(redeemer, CToken(cToken), redeemTokens, 0); if (err != Error.NO_ERROR) { return uint(err); } if (shortfall > 0) { return uint(Error.INSUFFICIENT_LIQUIDITY); } return uint(Error.NO_ERROR); } /** * @notice Validates redeem and reverts on rejection. May emit logs. * @param cToken Asset being redeemed * @param redeemer The address redeeming the tokens * @param redeemAmount The amount of the underlying asset being redeemed * @param redeemTokens The number of tokens being redeemed */ function redeemVerify(address cToken, address redeemer, uint redeemAmount, uint redeemTokens) external { // Shh - currently unused cToken; redeemer; // Require tokens is zero or amount is also zero if (redeemTokens == 0 && redeemAmount > 0) { revert("redeemTokens zero"); } } /** * @notice Checks if the account should be allowed to borrow the underlying asset of the given market * @param cToken The market to verify the borrow against * @param borrower The account which would borrow the asset * @param borrowAmount The amount of underlying the account would borrow * @return 0 if the borrow is allowed, otherwise a semi-opaque error code (See ErrorReporter.sol) */ function borrowAllowed(address cToken, address borrower, uint borrowAmount) external returns (uint) { // Pausing is a very serious situation - we revert to sound the alarms require(!borrowGuardianPaused[cToken], "borrow is paused"); if (!markets[cToken].isListed) { return uint(Error.MARKET_NOT_LISTED); } if (!markets[cToken].accountMembership[borrower]) { // only cTokens may call borrowAllowed if borrower not in market require(msg.sender == cToken, "sender must be cToken"); // attempt to add borrower to the market Error err = addToMarketInternal(CToken(msg.sender), borrower); if (err != Error.NO_ERROR) { return uint(err); } // it should be impossible to break the important invariant assert(markets[cToken].accountMembership[borrower]); } if (oracle.getUnderlyingPrice(CToken(cToken)) == 0) { return uint(Error.PRICE_ERROR); } (Error err, , uint shortfall) = getHypotheticalAccountLiquidityInternal(borrower, CToken(cToken), 0, borrowAmount); if (err != Error.NO_ERROR) { return uint(err); } if (shortfall > 0) { return uint(Error.INSUFFICIENT_LIQUIDITY); } // Keep the flywheel moving Exp memory borrowIndex = Exp({mantissa : CToken(cToken).borrowIndex()}); updateCompBorrowIndex(cToken, borrowIndex); distributeBorrowerComp(cToken, borrower, borrowIndex, false); return uint(Error.NO_ERROR); } /** * @notice Validates borrow and reverts on rejection. May emit logs. * @param cToken Asset whose underlying is being borrowed * @param borrower The address borrowing the underlying * @param borrowAmount The amount of the underlying asset requested to borrow */ function borrowVerify(address cToken, address borrower, uint borrowAmount) external { // Shh - currently unused cToken; borrower; borrowAmount; // Shh - we don't ever want this hook to be marked pure if (false) { maxAssets = maxAssets; } } /** * @notice Checks if the account should be allowed to repay a borrow in the given market * @param cToken The market to verify the repay against * @param payer The account which would repay the asset * @param borrower The account which would borrowed the asset * @param repayAmount The amount of the underlying asset the account would repay * @return 0 if the repay is allowed, otherwise a semi-opaque error code (See ErrorReporter.sol) */ function repayBorrowAllowed( address cToken, address payer, address borrower, uint repayAmount) external returns (uint) { // Shh - currently unused payer; borrower; repayAmount; if (!markets[cToken].isListed) { return uint(Error.MARKET_NOT_LISTED); } // Keep the flywheel moving Exp memory borrowIndex = Exp({mantissa : CToken(cToken).borrowIndex()}); updateCompBorrowIndex(cToken, borrowIndex); distributeBorrowerComp(cToken, borrower, borrowIndex, false); return uint(Error.NO_ERROR); } /** * @notice Validates repayBorrow and reverts on rejection. May emit logs. * @param cToken Asset being repaid * @param payer The address repaying the borrow * @param borrower The address of the borrower * @param actualRepayAmount The amount of underlying being repaid */ function repayBorrowVerify( address cToken, address payer, address borrower, uint actualRepayAmount, uint borrowerIndex) external { // Shh - currently unused cToken; payer; borrower; actualRepayAmount; borrowerIndex; // Shh - we don't ever want this hook to be marked pure if (false) { maxAssets = maxAssets; } } /** * @notice Checks if the liquidation should be allowed to occur * @param cTokenBorrowed Asset which was borrowed by the borrower * @param cTokenCollateral Asset which was used as collateral and will be seized * @param liquidator The address repaying the borrow and seizing the collateral * @param borrower The address of the borrower * @param repayAmount The amount of underlying being repaid */ function liquidateBorrowAllowed( address cTokenBorrowed, address cTokenCollateral, address liquidator, address borrower, uint repayAmount) external returns (uint) { // Shh - currently unused liquidator; if (!markets[cTokenBorrowed].isListed || !markets[cTokenCollateral].isListed) { return uint(Error.MARKET_NOT_LISTED); } /* The borrower must have shortfall in order to be liquidatable */ (Error err, , uint shortfall) = getAccountLiquidityInternal(borrower); if (err != Error.NO_ERROR) { return uint(err); } if (shortfall == 0) { return uint(Error.INSUFFICIENT_SHORTFALL); } /* The liquidator may not repay more than what is allowed by the closeFactor */ uint borrowBalance = CToken(cTokenBorrowed).borrowBalanceStored(borrower); (MathError mathErr, uint maxClose) = mulScalarTruncate(Exp({mantissa : closeFactorMantissa}), borrowBalance); if (mathErr != MathError.NO_ERROR) { return uint(Error.MATH_ERROR); } if (repayAmount > maxClose) { return uint(Error.TOO_MUCH_REPAY); } return uint(Error.NO_ERROR); } /** * @notice Validates liquidateBorrow and reverts on rejection. May emit logs. * @param cTokenBorrowed Asset which was borrowed by the borrower * @param cTokenCollateral Asset which was used as collateral and will be seized * @param liquidator The address repaying the borrow and seizing the collateral * @param borrower The address of the borrower * @param actualRepayAmount The amount of underlying being repaid */ function liquidateBorrowVerify( address cTokenBorrowed, address cTokenCollateral, address liquidator, address borrower, uint actualRepayAmount, uint seizeTokens) external { // Shh - currently unused cTokenBorrowed; cTokenCollateral; liquidator; borrower; actualRepayAmount; seizeTokens; // Shh - we don't ever want this hook to be marked pure if (false) { maxAssets = maxAssets; } } /** * @notice Checks if the seizing of assets should be allowed to occur * @param cTokenCollateral Asset which was used as collateral and will be seized * @param cTokenBorrowed Asset which was borrowed by the borrower * @param liquidator The address repaying the borrow and seizing the collateral * @param borrower The address of the borrower * @param seizeTokens The number of collateral tokens to seize */ function seizeAllowed( address cTokenCollateral, address cTokenBorrowed, address liquidator, address borrower, uint seizeTokens) external returns (uint) { // Pausing is a very serious situation - we revert to sound the alarms require(!seizeGuardianPaused, "seize is paused"); // Shh - currently unused seizeTokens; if (!markets[cTokenCollateral].isListed || !markets[cTokenBorrowed].isListed) { return uint(Error.MARKET_NOT_LISTED); } if (CToken(cTokenCollateral).comptroller() != CToken(cTokenBorrowed).comptroller()) { return uint(Error.COMPTROLLER_MISMATCH); } // Keep the flywheel moving updateCompSupplyIndex(cTokenCollateral); distributeSupplierComp(cTokenCollateral, borrower, false); distributeSupplierComp(cTokenCollateral, liquidator, false); return uint(Error.NO_ERROR); } /** * @notice Validates seize and reverts on rejection. May emit logs. * @param cTokenCollateral Asset which was used as collateral and will be seized * @param cTokenBorrowed Asset which was borrowed by the borrower * @param liquidator The address repaying the borrow and seizing the collateral * @param borrower The address of the borrower * @param seizeTokens The number of collateral tokens to seize */ function seizeVerify( address cTokenCollateral, address cTokenBorrowed, address liquidator, address borrower, uint seizeTokens) external { // Shh - currently unused cTokenCollateral; cTokenBorrowed; liquidator; borrower; seizeTokens; // Shh - we don't ever want this hook to be marked pure if (false) { maxAssets = maxAssets; } } /** * @notice Checks if the account should be allowed to transfer tokens in the given market * @param cToken The market to verify the transfer against * @param src The account which sources the tokens * @param dst The account which receives the tokens * @param transferTokens The number of cTokens to transfer * @return 0 if the transfer is allowed, otherwise a semi-opaque error code (See ErrorReporter.sol) */ function transferAllowed(address cToken, address src, address dst, uint transferTokens) external returns (uint) { // Pausing is a very serious situation - we revert to sound the alarms require(!transferGuardianPaused, "transfer is paused"); // Currently the only consideration is whether or not // the src is allowed to redeem this many tokens uint allowed = redeemAllowedInternal(cToken, src, transferTokens); if (allowed != uint(Error.NO_ERROR)) { return allowed; } // Keep the flywheel moving updateCompSupplyIndex(cToken); distributeSupplierComp(cToken, src, false); distributeSupplierComp(cToken, dst, false); return uint(Error.NO_ERROR); } /** * @notice Validates transfer and reverts on rejection. May emit logs. * @param cToken Asset being transferred * @param src The account which sources the tokens * @param dst The account which receives the tokens * @param transferTokens The number of cTokens to transfer */ function transferVerify(address cToken, address src, address dst, uint transferTokens) external { // Shh - currently unused cToken; src; dst; transferTokens; // Shh - we don't ever want this hook to be marked pure if (false) { maxAssets = maxAssets; } } /*** Liquidity/Liquidation Calculations ***/ /** * @dev Local vars for avoiding stack-depth limits in calculating account liquidity. * Note that `cTokenBalance` is the number of cTokens the account owns in the market, * whereas `borrowBalance` is the amount of underlying that the account has borrowed. */ struct AccountLiquidityLocalVars { uint sumCollateral; uint sumBorrowPlusEffects; uint cTokenBalance; uint borrowBalance; uint exchangeRateMantissa; uint oraclePriceMantissa; Exp collateralFactor; Exp exchangeRate; Exp oraclePrice; Exp tokensToDenom; } /** * @notice Determine the current account liquidity wrt collateral requirements * @return (possible error code (semi-opaque), account liquidity in excess of collateral requirements, * account shortfall below collateral requirements) */ function getAccountLiquidity(address account) public view returns (uint, uint, uint) { (Error err, uint liquidity, uint shortfall) = getHypotheticalAccountLiquidityInternal(account, CToken(0), 0, 0); return (uint(err), liquidity, shortfall); } /** * @notice Determine the current account liquidity wrt collateral requirements * @return (possible error code, account liquidity in excess of collateral requirements, * account shortfall below collateral requirements) */ function getAccountLiquidityInternal(address account) internal view returns (Error, uint, uint) { return getHypotheticalAccountLiquidityInternal(account, CToken(0), 0, 0); } /** * @notice Determine what the account liquidity would be if the given amounts were redeemed/borrowed * @param cTokenModify The market to hypothetically redeem/borrow in * @param account The account to determine liquidity for * @param redeemTokens The number of tokens to hypothetically redeem * @param borrowAmount The amount of underlying to hypothetically borrow * @return (possible error code (semi-opaque), hypothetical account liquidity in excess of collateral requirements, * hypothetical account shortfall below collateral requirements) */ function getHypotheticalAccountLiquidity( address account, address cTokenModify, uint redeemTokens, uint borrowAmount) public view returns (uint, uint, uint) { (Error err, uint liquidity, uint shortfall) = getHypotheticalAccountLiquidityInternal(account, CToken(cTokenModify), redeemTokens, borrowAmount); return (uint(err), liquidity, shortfall); } /** * @notice Determine what the account liquidity would be if the given amounts were redeemed/borrowed * @param cTokenModify The market to hypothetically redeem/borrow in * @param account The account to determine liquidity for * @param redeemTokens The number of tokens to hypothetically redeem * @param borrowAmount The amount of underlying to hypothetically borrow * @dev Note that we calculate the exchangeRateStored for each collateral cToken using stored data, * without calculating accumulated interest. * @return (possible error code, hypothetical account liquidity in excess of collateral requirements, * hypothetical account shortfall below collateral requirements) */ function getHypotheticalAccountLiquidityInternal( address account, CToken cTokenModify, uint redeemTokens, uint borrowAmount) internal view returns (Error, uint, uint) { AccountLiquidityLocalVars memory vars; // Holds all our calculation results uint oErr; MathError mErr; // For each asset the account is in CToken[] memory assets = accountAssets[account]; for (uint i = 0; i < assets.length; i++) { CToken asset = assets[i]; // Read the balances and exchange rate from the cToken (oErr, vars.cTokenBalance, vars.borrowBalance, vars.exchangeRateMantissa) = asset.getAccountSnapshot(account); if (oErr != 0) {// semi-opaque error code, we assume NO_ERROR == 0 is invariant between upgrades return (Error.SNAPSHOT_ERROR, 0, 0); } vars.collateralFactor = Exp({mantissa : markets[address(asset)].collateralFactorMantissa}); vars.exchangeRate = Exp({mantissa : vars.exchangeRateMantissa}); // Get the normalized price of the asset vars.oraclePriceMantissa = oracle.getUnderlyingPrice(asset); if (vars.oraclePriceMantissa == 0) { return (Error.PRICE_ERROR, 0, 0); } vars.oraclePrice = Exp({mantissa : vars.oraclePriceMantissa}); // Pre-compute a conversion factor from tokens -> ether (normalized price value) (mErr, vars.tokensToDenom) = mulExp3(vars.collateralFactor, vars.exchangeRate, vars.oraclePrice); if (mErr != MathError.NO_ERROR) { return (Error.MATH_ERROR, 0, 0); } // sumCollateral += tokensToDenom * cTokenBalance (mErr, vars.sumCollateral) = mulScalarTruncateAddUInt(vars.tokensToDenom, vars.cTokenBalance, vars.sumCollateral); if (mErr != MathError.NO_ERROR) { return (Error.MATH_ERROR, 0, 0); } // sumBorrowPlusEffects += oraclePrice * borrowBalance (mErr, vars.sumBorrowPlusEffects) = mulScalarTruncateAddUInt(vars.oraclePrice, vars.borrowBalance, vars.sumBorrowPlusEffects); if (mErr != MathError.NO_ERROR) { return (Error.MATH_ERROR, 0, 0); } // Calculate effects of interacting with cTokenModify if (asset == cTokenModify) { // redeem effect // sumBorrowPlusEffects += tokensToDenom * redeemTokens (mErr, vars.sumBorrowPlusEffects) = mulScalarTruncateAddUInt(vars.tokensToDenom, redeemTokens, vars.sumBorrowPlusEffects); if (mErr != MathError.NO_ERROR) { return (Error.MATH_ERROR, 0, 0); } // borrow effect // sumBorrowPlusEffects += oraclePrice * borrowAmount (mErr, vars.sumBorrowPlusEffects) = mulScalarTruncateAddUInt(vars.oraclePrice, borrowAmount, vars.sumBorrowPlusEffects); if (mErr != MathError.NO_ERROR) { return (Error.MATH_ERROR, 0, 0); } } } // These are safe, as the underflow condition is checked first if (vars.sumCollateral > vars.sumBorrowPlusEffects) { return (Error.NO_ERROR, vars.sumCollateral - vars.sumBorrowPlusEffects, 0); } else { return (Error.NO_ERROR, 0, vars.sumBorrowPlusEffects - vars.sumCollateral); } } /** * @notice Calculate number of tokens of collateral asset to seize given an underlying amount * @dev Used in liquidation (called in cToken.liquidateBorrowFresh) * @param cTokenBorrowed The address of the borrowed cToken * @param cTokenCollateral The address of the collateral cToken * @param actualRepayAmount The amount of cTokenBorrowed underlying to convert into cTokenCollateral tokens * @return (errorCode, number of cTokenCollateral tokens to be seized in a liquidation) */ function liquidateCalculateSeizeTokens(address cTokenBorrowed, address cTokenCollateral, uint actualRepayAmount) external view returns (uint, uint) { /* Read oracle prices for borrowed and collateral markets */ uint priceBorrowedMantissa = oracle.getUnderlyingPrice(CToken(cTokenBorrowed)); uint priceCollateralMantissa = oracle.getUnderlyingPrice(CToken(cTokenCollateral)); if (priceBorrowedMantissa == 0 || priceCollateralMantissa == 0) { return (uint(Error.PRICE_ERROR), 0); } /* * Get the exchange rate and calculate the number of collateral tokens to seize: * seizeAmount = actualRepayAmount * liquidationIncentive * priceBorrowed / priceCollateral * seizeTokens = seizeAmount / exchangeRate * = actualRepayAmount * (liquidationIncentive * priceBorrowed) / (priceCollateral * exchangeRate) */ uint exchangeRateMantissa = CToken(cTokenCollateral).exchangeRateStored(); // Note: reverts on error uint seizeTokens; Exp memory numerator; Exp memory denominator; Exp memory ratio; MathError mathErr; (mathErr, numerator) = mulExp(liquidationIncentiveMantissa, priceBorrowedMantissa); if (mathErr != MathError.NO_ERROR) { return (uint(Error.MATH_ERROR), 0); } (mathErr, denominator) = mulExp(priceCollateralMantissa, exchangeRateMantissa); if (mathErr != MathError.NO_ERROR) { return (uint(Error.MATH_ERROR), 0); } (mathErr, ratio) = divExp(numerator, denominator); if (mathErr != MathError.NO_ERROR) { return (uint(Error.MATH_ERROR), 0); } (mathErr, seizeTokens) = mulScalarTruncate(ratio, actualRepayAmount); if (mathErr != MathError.NO_ERROR) { return (uint(Error.MATH_ERROR), 0); } return (uint(Error.NO_ERROR), seizeTokens); } /*** Admin Functions ***/ /** * @notice Sets a new price oracle for the comptroller * @dev Admin function to set a new price oracle * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _setPriceOracle(PriceOracle newOracle) public returns (uint) { // Check caller is admin if (msg.sender != admin) { return fail(Error.UNAUTHORIZED, FailureInfo.SET_PRICE_ORACLE_OWNER_CHECK); } // Track the old oracle for the comptroller PriceOracle oldOracle = oracle; // Set comptroller's oracle to newOracle oracle = newOracle; // Emit NewPriceOracle(oldOracle, newOracle) emit NewPriceOracle(oldOracle, newOracle); return uint(Error.NO_ERROR); } /** * @notice Sets the closeFactor used when liquidating borrows * @dev Admin function to set closeFactor * @param newCloseFactorMantissa New close factor, scaled by 1e18 * @return uint 0=success, otherwise a failure. (See ErrorReporter for details) */ function _setCloseFactor(uint newCloseFactorMantissa) external returns (uint) { // Check caller is admin if (msg.sender != admin) { return fail(Error.UNAUTHORIZED, FailureInfo.SET_CLOSE_FACTOR_OWNER_CHECK); } Exp memory newCloseFactorExp = Exp({mantissa : newCloseFactorMantissa}); Exp memory lowLimit = Exp({mantissa : closeFactorMinMantissa}); if (lessThanOrEqualExp(newCloseFactorExp, lowLimit)) { return fail(Error.INVALID_CLOSE_FACTOR, FailureInfo.SET_CLOSE_FACTOR_VALIDATION); } Exp memory highLimit = Exp({mantissa : closeFactorMaxMantissa}); if (lessThanExp(highLimit, newCloseFactorExp)) { return fail(Error.INVALID_CLOSE_FACTOR, FailureInfo.SET_CLOSE_FACTOR_VALIDATION); } uint oldCloseFactorMantissa = closeFactorMantissa; closeFactorMantissa = newCloseFactorMantissa; emit NewCloseFactor(oldCloseFactorMantissa, closeFactorMantissa); return uint(Error.NO_ERROR); } /** * @notice Sets the collateralFactor for a market * @dev Admin function to set per-market collateralFactor * @param cToken The market to set the factor on * @param newCollateralFactorMantissa The new collateral factor, scaled by 1e18 * @return uint 0=success, otherwise a failure. (See ErrorReporter for details) */ function _setCollateralFactor(CToken cToken, uint newCollateralFactorMantissa) external returns (uint) { // Check caller is admin if (msg.sender != admin) { return fail(Error.UNAUTHORIZED, FailureInfo.SET_COLLATERAL_FACTOR_OWNER_CHECK); } // Verify market is listed Market storage market = markets[address(cToken)]; if (!market.isListed) { return fail(Error.MARKET_NOT_LISTED, FailureInfo.SET_COLLATERAL_FACTOR_NO_EXISTS); } Exp memory newCollateralFactorExp = Exp({mantissa : newCollateralFactorMantissa}); // Check collateral factor <= 0.9 Exp memory highLimit = Exp({mantissa : collateralFactorMaxMantissa}); if (lessThanExp(highLimit, newCollateralFactorExp)) { return fail(Error.INVALID_COLLATERAL_FACTOR, FailureInfo.SET_COLLATERAL_FACTOR_VALIDATION); } // If collateral factor != 0, fail if price == 0 if (newCollateralFactorMantissa != 0 && oracle.getUnderlyingPrice(cToken) == 0) { return fail(Error.PRICE_ERROR, FailureInfo.SET_COLLATERAL_FACTOR_WITHOUT_PRICE); } // Set market's collateral factor to new collateral factor, remember old value uint oldCollateralFactorMantissa = market.collateralFactorMantissa; market.collateralFactorMantissa = newCollateralFactorMantissa; // Emit event with asset, old collateral factor, and new collateral factor emit NewCollateralFactor(cToken, oldCollateralFactorMantissa, newCollateralFactorMantissa); return uint(Error.NO_ERROR); } /** * @notice Sets maxAssets which controls how many markets can be entered * @dev Admin function to set maxAssets * @param newMaxAssets New max assets * @return uint 0=success, otherwise a failure. (See ErrorReporter for details) */ function _setMaxAssets(uint newMaxAssets) external returns (uint) { // Check caller is admin if (msg.sender != admin) { return fail(Error.UNAUTHORIZED, FailureInfo.SET_MAX_ASSETS_OWNER_CHECK); } uint oldMaxAssets = maxAssets; maxAssets = newMaxAssets; emit NewMaxAssets(oldMaxAssets, newMaxAssets); return uint(Error.NO_ERROR); } /** * @notice Sets liquidationIncentive * @dev Admin function to set liquidationIncentive * @param newLiquidationIncentiveMantissa New liquidationIncentive scaled by 1e18 * @return uint 0=success, otherwise a failure. (See ErrorReporter for details) */ function _setLiquidationIncentive(uint newLiquidationIncentiveMantissa) external returns (uint) { // Check caller is admin if (msg.sender != admin) { return fail(Error.UNAUTHORIZED, FailureInfo.SET_LIQUIDATION_INCENTIVE_OWNER_CHECK); } // Check de-scaled min <= newLiquidationIncentive <= max Exp memory newLiquidationIncentive = Exp({mantissa : newLiquidationIncentiveMantissa}); Exp memory minLiquidationIncentive = Exp({mantissa : liquidationIncentiveMinMantissa}); if (lessThanExp(newLiquidationIncentive, minLiquidationIncentive)) { return fail(Error.INVALID_LIQUIDATION_INCENTIVE, FailureInfo.SET_LIQUIDATION_INCENTIVE_VALIDATION); } Exp memory maxLiquidationIncentive = Exp({mantissa : liquidationIncentiveMaxMantissa}); if (lessThanExp(maxLiquidationIncentive, newLiquidationIncentive)) { return fail(Error.INVALID_LIQUIDATION_INCENTIVE, FailureInfo.SET_LIQUIDATION_INCENTIVE_VALIDATION); } // Save current value for use in log uint oldLiquidationIncentiveMantissa = liquidationIncentiveMantissa; // Set liquidation incentive to new incentive liquidationIncentiveMantissa = newLiquidationIncentiveMantissa; // Emit event with old incentive, new incentive emit NewLiquidationIncentive(oldLiquidationIncentiveMantissa, newLiquidationIncentiveMantissa); return uint(Error.NO_ERROR); } /** * @notice Add the market to the markets mapping and set it as listed * @dev Admin function to set isListed and add support for the market * @param cToken The address of the market (token) to list * @return uint 0=success, otherwise a failure. (See enum Error for details) */ function _supportMarket(CToken cToken) external returns (uint) { if (msg.sender != admin) { return fail(Error.UNAUTHORIZED, FailureInfo.SUPPORT_MARKET_OWNER_CHECK); } if (markets[address(cToken)].isListed) { return fail(Error.MARKET_ALREADY_LISTED, FailureInfo.SUPPORT_MARKET_EXISTS); } cToken.isCToken(); // Sanity check to make sure its really a CToken markets[address(cToken)] = Market({isListed : true, isComped : true, collateralFactorMantissa : 0}); _addMarketInternal(address(cToken)); borrowGuardianPaused[address(cToken)] = true; //stage 1, not allow borrow emit MarketListed(cToken); return uint(Error.NO_ERROR); } function _addMarketInternal(address cToken) internal { for (uint i = 0; i < allMarkets.length; i ++) { require(allMarkets[i] != CToken(cToken), "market already added"); } allMarkets.push(CToken(cToken)); } /** * @notice Admin function to change the Pause Guardian * @param newPauseGuardian The address of the new Pause Guardian * @return uint 0=success, otherwise a failure. (See enum Error for details) */ function _setPauseGuardian(address newPauseGuardian) public returns (uint) { if (msg.sender != admin) { return fail(Error.UNAUTHORIZED, FailureInfo.SET_PAUSE_GUARDIAN_OWNER_CHECK); } // Save current value for inclusion in log address oldPauseGuardian = pauseGuardian; // Store pauseGuardian with value newPauseGuardian pauseGuardian = newPauseGuardian; // Emit NewPauseGuardian(OldPauseGuardian, NewPauseGuardian) emit NewPauseGuardian(oldPauseGuardian, pauseGuardian); return uint(Error.NO_ERROR); } function _setMintPaused(CToken cToken, bool state) public returns (bool) { require(markets[address(cToken)].isListed, "cannot pause a market that is not listed"); require(msg.sender == pauseGuardian || msg.sender == admin, "only pause guardian and admin can pause"); require(msg.sender == admin || state == true, "only admin can unpause"); mintGuardianPaused[address(cToken)] = state; emit MarketActionPaused(cToken, "Mint", state); return state; } function _setBorrowPaused(CToken cToken, bool state) public returns (bool) { require(markets[address(cToken)].isListed, "cannot pause a market that is not listed"); require(msg.sender == pauseGuardian || msg.sender == admin, "only pause guardian and admin can pause"); require(msg.sender == admin || state == true, "only admin can unpause"); borrowGuardianPaused[address(cToken)] = state; emit MarketActionPaused(cToken, "Borrow", state); return state; } function _setTransferPaused(bool state) public returns (bool) { require(msg.sender == pauseGuardian || msg.sender == admin, "only pause guardian and admin can pause"); require(msg.sender == admin || state == true, "only admin can unpause"); transferGuardianPaused = state; emit ActionPaused("Transfer", state); return state; } function _setSeizePaused(bool state) public returns (bool) { require(msg.sender == pauseGuardian || msg.sender == admin, "only pause guardian and admin can pause"); require(msg.sender == admin || state == true, "only admin can unpause"); seizeGuardianPaused = state; emit ActionPaused("Seize", state); return state; } function _become(Unitroller unitroller) public { require(msg.sender == unitroller.admin(), "only unitroller admin can change brains"); require(unitroller._acceptImplementation() == 0, "change not authorized"); } /** * @notice Checks caller is admin, or this contract is becoming the new implementation */ function adminOrInitializing() internal view returns (bool) { return msg.sender == admin || msg.sender == comptrollerImplementation; } /*** Comp Distribution ***/ /** * @notice Recalculate and update COMP speeds for all COMP markets */ function refreshCompSpeeds() public { require(msg.sender == tx.origin, "only externally owned accounts may refresh speeds"); refreshCompSpeedsInternal(); } function refreshCompSpeedsInternal() internal { CToken[] memory allMarkets_ = allMarkets; for (uint i = 0; i < allMarkets_.length; i++) { CToken cToken = allMarkets_[i]; Exp memory borrowIndex = Exp({mantissa : cToken.borrowIndex()}); updateCompSupplyIndex(address(cToken)); updateCompBorrowIndex(address(cToken), borrowIndex); } Exp memory borrowTotalUtility = Exp({mantissa : 0}); uint borrowAssetCount = 0; Exp memory borrowAverageUtility = Exp({mantissa : 0}); //calculate Borrow asset totalUtility if (miningRule == 1) {//mining by borrow for (uint i = 0; i < allMarkets_.length; i++) { CToken cToken = allMarkets_[i]; if (markets[address(cToken)].isComped && !borrowGuardianPaused[address(cToken)]) { Exp memory assetPrice = Exp({mantissa : oracle.getUnderlyingPrice(cToken)}); Exp memory utility = mul_(assetPrice, cToken.totalBorrows()); borrowTotalUtility = add_(borrowTotalUtility, utility); borrowAssetCount++; } } if (borrowAssetCount > 0) { borrowAverageUtility = div_(borrowTotalUtility, borrowAssetCount); } } Exp memory totalUtility = Exp({mantissa : 0}); Exp[] memory utilities = new Exp[](allMarkets_.length); for (uint i = 0; i < allMarkets_.length; i++) { CToken cToken = allMarkets_[i]; if (markets[address(cToken)].isComped) { Exp memory utility; uint buff = miningBuff[address(cToken)]; Exp memory price = Exp({mantissa : oracle.getUnderlyingPrice(cToken)}); if (buff == 0) buff = 1; if (miningRule == 0) {//mining by supply //supply * exchange rate = asset balance Exp memory supply = Exp({mantissa: cToken.totalSupply()}); //Exp memory exchangeRate = Exp({mantissa: cToken.exchangeRateStored()}); uint assetBalance = mul_(cToken.exchangeRateStored(), supply); // div e18 //usd price * balance = utility Exp memory realUtility = Exp({mantissa: mul_(assetBalance, price.mantissa)}); utility = mul_(realUtility, buff); //buff } else if (miningRule == 1) {//mining by borrow if (borrowGuardianPaused[address(cToken)]) { //averageUtility with in price utility = mul_(borrowAverageUtility, buff); } else { Exp memory realUtility = mul_(price, cToken.totalBorrows()); utility = mul_(realUtility, buff); } } else {//can't support revert(); } utilities[i] = utility; totalUtility = add_(totalUtility, utility); } } for (uint i = 0; i < allMarkets_.length; i++) { CToken cToken = allMarkets[i]; uint newSpeed = totalUtility.mantissa > 0 ? mul_(compRate, div_(utilities[i], totalUtility)) : 0; compSpeeds[address(cToken)] = newSpeed; emit CompSpeedUpdated(cToken, newSpeed, totalUtility.mantissa, utilities[i].mantissa); } } /** * @notice Accrue COMP to the market by updating the supply index * @param cToken The market whose supply index to update */ function updateCompSupplyIndex(address cToken) internal { CompMarketState storage supplyState = compSupplyState[cToken]; uint supplySpeed = compSpeeds[cToken]; uint blockNumber = getBlockNumber(); uint deltaBlocks = sub_(blockNumber, uint(supplyState.block)); if (deltaBlocks > 0 && supplySpeed > 0) { uint supplyTokens = CToken(cToken).totalSupply(); uint compAccrued = mul_(deltaBlocks, supplySpeed); Double memory ratio = supplyTokens > 0 ? fraction(compAccrued, supplyTokens) : Double({mantissa : 0}); Double memory index = add_(Double({mantissa : supplyState.index}), ratio); compSupplyState[cToken] = CompMarketState({ index : safe224(index.mantissa, "new index exceeds 224 bits"), block : safe32(blockNumber, "block number exceeds 32 bits") }); } else if (deltaBlocks > 0) { supplyState.block = safe32(blockNumber, "block number exceeds 32 bits"); } } /** * @notice Accrue COMP to the market by updating the borrow index * @param cToken The market whose borrow index to update */ function updateCompBorrowIndex(address cToken, Exp memory marketBorrowIndex) internal { CompMarketState storage borrowState = compBorrowState[cToken]; uint borrowSpeed = compSpeeds[cToken]; uint blockNumber = getBlockNumber(); uint deltaBlocks = sub_(blockNumber, uint(borrowState.block)); if (deltaBlocks > 0 && borrowSpeed > 0) { uint borrowAmount = div_(CToken(cToken).totalBorrows(), marketBorrowIndex); uint compAccrued = mul_(deltaBlocks, borrowSpeed); Double memory ratio = borrowAmount > 0 ? fraction(compAccrued, borrowAmount) : Double({mantissa : 0}); Double memory index = add_(Double({mantissa : borrowState.index}), ratio); compBorrowState[cToken] = CompMarketState({ index : safe224(index.mantissa, "new index exceeds 224 bits"), block : safe32(blockNumber, "block number exceeds 32 bits") }); } else if (deltaBlocks > 0) { borrowState.block = safe32(blockNumber, "block number exceeds 32 bits"); } } /** * @notice Calculate COMP accrued by a supplier and possibly transfer it to them * @param cToken The market in which the supplier is interacting * @param supplier The address of the supplier to distribute COMP to */ function distributeSupplierComp(address cToken, address supplier, bool distributeAll) internal { CompMarketState storage supplyState = compSupplyState[cToken]; Double memory supplyIndex = Double({mantissa : supplyState.index}); Double memory supplierIndex = Double({mantissa : compSupplierIndex[cToken][supplier]}); compSupplierIndex[cToken][supplier] = supplyIndex.mantissa; if (supplierIndex.mantissa == 0 && supplyIndex.mantissa > 0) { supplierIndex.mantissa = compInitialIndex; } Double memory deltaIndex = sub_(supplyIndex, supplierIndex); uint supplierTokens = CToken(cToken).balanceOf(supplier); uint supplierDelta = mul_(supplierTokens, deltaIndex); uint supplierAccrued = add_(compAccrued[supplier], supplierDelta); compAccrued[supplier] = transferComp(supplier, supplierAccrued, distributeAll ? 0 : compClaimThreshold); emit DistributedSupplierComp(CToken(cToken), supplier, supplierDelta, supplyIndex.mantissa); } /** * @notice Calculate COMP accrued by a borrower and possibly transfer it to them * @dev Borrowers will not begin to accrue until after the first interaction with the protocol. * @param cToken The market in which the borrower is interacting * @param borrower The address of the borrower to distribute COMP to */ function distributeBorrowerComp(address cToken, address borrower, Exp memory marketBorrowIndex, bool distributeAll) internal { CompMarketState storage borrowState = compBorrowState[cToken]; Double memory borrowIndex = Double({mantissa : borrowState.index}); Double memory borrowerIndex = Double({mantissa : compBorrowerIndex[cToken][borrower]}); compBorrowerIndex[cToken][borrower] = borrowIndex.mantissa; if (borrowerIndex.mantissa > 0) { Double memory deltaIndex = sub_(borrowIndex, borrowerIndex); uint borrowerAmount = div_(CToken(cToken).borrowBalanceStored(borrower), marketBorrowIndex); uint borrowerDelta = mul_(borrowerAmount, deltaIndex); uint borrowerAccrued = add_(compAccrued[borrower], borrowerDelta); compAccrued[borrower] = transferComp(borrower, borrowerAccrued, distributeAll ? 0 : compClaimThreshold); emit DistributedBorrowerComp(CToken(cToken), borrower, borrowerDelta, borrowIndex.mantissa); } } /** * @notice Transfer COMP to the user, if they are above the threshold * @dev Note: If there is not enough COMP, we do not perform the transfer all. * @param user The address of the user to transfer COMP to * @param userAccrued The amount of COMP to (possibly) transfer * @return The amount of COMP which was NOT transferred to the user */ function transferComp(address user, uint userAccrued, uint threshold) internal returns (uint) { if (userAccrued >= threshold && userAccrued > 0) { Cheese cheese = Cheese(getCheeseAddress()); uint cheeseRemaining = cheese.balanceOf(address(this)); if (userAccrued <= cheeseRemaining) { cheese.transfer(user, userAccrued); return 0; } } return userAccrued; } /** * @notice Claim all the comp accrued by holder in all markets * @param holder The address to claim COMP for */ function claimComp(address holder) public { return claimComp(holder, allMarkets); } /** * @notice Claim all the comp accrued by holder in the specified markets * @param holder The address to claim COMP for * @param cTokens The list of markets to claim COMP in */ function claimComp(address holder, CToken[] memory cTokens) public { address[] memory holders = new address[](1); holders[0] = holder; claimComp(holders, cTokens, true, true); } /** * @notice Claim all comp accrued by the holders * @param holders The addresses to claim COMP for * @param cTokens The list of markets to claim COMP in * @param borrowers Whether or not to claim COMP earned by borrowing * @param suppliers Whether or not to claim COMP earned by supplying */ function claimComp(address[] memory holders, CToken[] memory cTokens, bool borrowers, bool suppliers) public { for (uint i = 0; i < cTokens.length; i++) { CToken cToken = cTokens[i]; require(markets[address(cToken)].isListed, "market must be listed"); if (borrowers == true) { Exp memory borrowIndex = Exp({mantissa : cToken.borrowIndex()}); updateCompBorrowIndex(address(cToken), borrowIndex); for (uint j = 0; j < holders.length; j++) { distributeBorrowerComp(address(cToken), holders[j], borrowIndex, true); } } if (suppliers == true) { updateCompSupplyIndex(address(cToken)); for (uint j = 0; j < holders.length; j++) { distributeSupplierComp(address(cToken), holders[j], true); } } } } /*** Comp Distribution Admin ***/ /** * @notice Set the amount of COMP distributed per block * @param compRate_ The amount of COMP wei per block to distribute */ function _setCompRate(uint compRate_) public { require(adminOrInitializing(), "only admin can change comp rate"); uint oldRate = compRate; compRate = compRate_; emit NewCompRate(oldRate, compRate_); refreshCompSpeedsInternal(); } /** * @notice Add markets to compMarkets, allowing them to earn COMP in the flywheel * @param cTokens The addresses of the markets to add */ function _addCompMarkets(address[] memory cTokens) public { require(adminOrInitializing(), "only admin can add comp market"); for (uint i = 0; i < cTokens.length; i++) { _addCompMarketInternal(cTokens[i]); } refreshCompSpeedsInternal(); } function _addCompMarketInternal(address cToken) internal { Market storage market = markets[cToken]; require(market.isListed == true, "comp market is not listed"); require(market.isComped == false, "comp market already added"); market.isComped = true; emit MarketComped(CToken(cToken), true); if (compSupplyState[cToken].index == 0 && compSupplyState[cToken].block == 0) { compSupplyState[cToken] = CompMarketState({ index : compInitialIndex, block : safe32(getBlockNumber(), "block number exceeds 32 bits") }); } if (compBorrowState[cToken].index == 0 && compBorrowState[cToken].block == 0) { compBorrowState[cToken] = CompMarketState({ index : compInitialIndex, block : safe32(getBlockNumber(), "block number exceeds 32 bits") }); } } /** * @notice Remove a market from compMarkets, preventing it from earning COMP in the flywheel * @param cToken The address of the market to drop */ function _dropCompMarket(address cToken) public { require(msg.sender == admin, "only admin can drop comp market"); Market storage market = markets[cToken]; require(market.isComped == true, "market is not a comp market"); market.isComped = false; emit MarketComped(CToken(cToken), false); refreshCompSpeedsInternal(); } function _setMiningBuff(address cToken, uint buff) public { require(adminOrInitializing(), "only admin can change cheese rate"); miningBuff[cToken] = buff; } function _changeMiningRule() public { if (msg.sender != admin || miningRule != 0) { return; } /* require(adminOrInitializing(), "only admin can set mining rule"); require(miningRule == 0, "only change mining rule from 0 to 1"); */ miningRule = 1; } /** * @notice Return all of the markets * @dev The automatic getter may be used to access an individual market. * @return The list of market addresses */ function getAllMarkets() public view returns (CToken[] memory) { return allMarkets; } function getBlockNumber() public view returns (uint) { return block.number; } /** * @notice Return the address of the COMP token * @return The address of COMP */ function getCheeseAddress() public view returns (address) { return 0x31Ec45237800102F1c42a40dfCCF276ac5386fce; } } contract CErc20 is CToken, CErc20Interface { constructor() public { admin = msg.sender; } /** * @notice Initialize the new money market * @param underlying_ The address of the underlying asset * @param comptroller_ The address of the Comptroller * @param interestRateModel_ The address of the interest rate model * @param initialExchangeRateMantissa_ The initial exchange rate, scaled by 1e18 * @param name_ ERC-20 name of this token * @param symbol_ ERC-20 symbol of this token * @param decimals_ ERC-20 decimal precision of this token */ function initialize(address underlying_, ComptrollerInterface comptroller_, InterestRateModel interestRateModel_, uint initialExchangeRateMantissa_, string memory name_, string memory symbol_, uint8 decimals_) public { // CToken initialize does the bulk of the work super.initialize(comptroller_, interestRateModel_, initialExchangeRateMantissa_, name_, symbol_, decimals_); // Set underlying and sanity check it underlying = underlying_; EIP20Interface(underlying).totalSupply(); } /*** User Interface ***/ /** * @notice Sender supplies assets into the market and receives cTokens in exchange * @dev Accrues interest whether or not the operation succeeds, unless reverted * @param mintAmount The amount of the underlying asset to supply * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function mint(uint mintAmount) external returns (uint) { (uint err,) = mintInternal(mintAmount); return err; } /** * @notice Sender redeems cTokens in exchange for the underlying asset * @dev Accrues interest whether or not the operation succeeds, unless reverted * @param redeemTokens The number of cTokens to redeem into underlying * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function redeem(uint redeemTokens) external returns (uint) { return redeemInternal(redeemTokens); } /** * @notice Sender redeems cTokens in exchange for a specified amount of underlying asset * @dev Accrues interest whether or not the operation succeeds, unless reverted * @param redeemAmount The amount of underlying to redeem * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function redeemUnderlying(uint redeemAmount) external returns (uint) { return redeemUnderlyingInternal(redeemAmount); } /** * @notice Sender borrows assets from the protocol to their own address * @param borrowAmount The amount of the underlying asset to borrow * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function borrow(uint borrowAmount) external returns (uint) { return borrowInternal(borrowAmount); } /** * @notice Sender repays their own borrow * @param repayAmount The amount to repay * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function repayBorrow(uint repayAmount) external returns (uint) { (uint err,) = repayBorrowInternal(repayAmount); return err; } /** * @notice Sender repays a borrow belonging to borrower * @param borrower the account with the debt being payed off * @param repayAmount The amount to repay * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function repayBorrowBehalf(address borrower, uint repayAmount) external returns (uint) { (uint err,) = repayBorrowBehalfInternal(borrower, repayAmount); return err; } /** * @notice The sender liquidates the borrowers collateral. * The collateral seized is transferred to the liquidator. * @param borrower The borrower of this cToken to be liquidated * @param repayAmount The amount of the underlying borrowed asset to repay * @param cTokenCollateral The market in which to seize collateral from the borrower * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function liquidateBorrow(address borrower, uint repayAmount, CTokenInterface cTokenCollateral) external returns (uint) { (uint err,) = liquidateBorrowInternal(borrower, repayAmount, cTokenCollateral); return err; } /** * @notice The sender adds to reserves. * @param addAmount The amount fo underlying token to add as reserves * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _addReserves(uint addAmount) external returns (uint) { return _addReservesInternal(addAmount); } /*** Safe Token ***/ /** * @notice Gets balance of this contract in terms of the underlying * @dev This excludes the value of the current message, if any * @return The quantity of underlying tokens owned by this contract */ function getCashPrior() internal view returns (uint) { EIP20Interface token = EIP20Interface(underlying); return token.balanceOf(address(this)); } /** * @dev Similar to EIP20 transfer, except it handles a False result from `transferFrom` and reverts in that case. * This will revert due to insufficient balance or insufficient allowance. * This function returns the actual amount received, * which may be less than `amount` if there is a fee attached to the transfer. * * Note: This wrapper safely handles non-standard ERC-20 tokens that do not return a value. * See here: https://medium.com/coinmonks/missing-return-value-bug-at-least-130-tokens-affected-d67bf08521ca */ function doTransferIn(address from, uint amount) internal returns (uint) { EIP20NonStandardInterface token = EIP20NonStandardInterface(underlying); uint balanceBefore = EIP20Interface(underlying).balanceOf(address(this)); token.transferFrom(from, address(this), amount); bool success; assembly { switch returndatasize() case 0 { // This is a non-standard ERC-20 success := not(0) // set success to true } case 32 { // This is a compliant ERC-20 returndatacopy(0, 0, 32) success := mload(0) // Set `success = returndata` of external call } default { // This is an excessively non-compliant ERC-20, revert. revert(0, 0) } } require(success, "TOKEN_TRANSFER_IN_FAILED"); // Calculate the amount that was *actually* transferred uint balanceAfter = EIP20Interface(underlying).balanceOf(address(this)); require(balanceAfter >= balanceBefore, "TOKEN_TRANSFER_IN_OVERFLOW"); return balanceAfter - balanceBefore; // underflow already checked above, just subtract } /** * @dev Similar to EIP20 transfer, except it handles a False success from `transfer` and returns an explanatory * error code rather than reverting. If caller has not called checked protocol's balance, this may revert due to * insufficient cash held in this contract. If caller has checked protocol's balance prior to this call, and verified * it is >= amount, this should not revert in normal conditions. * * Note: This wrapper safely handles non-standard ERC-20 tokens that do not return a value. * See here: https://medium.com/coinmonks/missing-return-value-bug-at-least-130-tokens-affected-d67bf08521ca */ function doTransferOut(address payable to, uint amount) internal { EIP20NonStandardInterface token = EIP20NonStandardInterface(underlying); token.transfer(to, amount); bool success; assembly { switch returndatasize() case 0 { // This is a non-standard ERC-20 success := not(0) // set success to true } case 32 { // This is a complaint ERC-20 returndatacopy(0, 0, 32) success := mload(0) // Set `success = returndata` of external call } default { // This is an excessively non-compliant ERC-20, revert. revert(0, 0) } } require(success, "TOKEN_TRANSFER_OUT_FAILED"); } } contract CErc20Delegate is CErc20, CDelegateInterface { /** * @notice Construct an empty delegate */ constructor() public {} /** * @notice Called by the delegator on a delegate to initialize it for duty * @param data The encoded bytes data for any initialization */ function _becomeImplementation(bytes memory data) public { // Shh -- currently unused data; // Shh -- we don't ever want this hook to be marked pure if (false) { implementation = address(0); } require(msg.sender == admin, "only the admin may call _becomeImplementation"); } /** * @notice Called by the delegator on a delegate to forfeit its responsibility */ function _resignImplementation() public { // Shh -- we don't ever want this hook to be marked pure if (false) { implementation = address(0); } require(msg.sender == admin, "only the admin may call _resignImplementation"); } } contract CErc20Immutable is CErc20 { /** * @notice Construct a new money market * @param underlying_ The address of the underlying asset * @param comptroller_ The address of the Comptroller * @param interestRateModel_ The address of the interest rate model * @param initialExchangeRateMantissa_ The initial exchange rate, scaled by 1e18 * @param name_ ERC-20 name of this token * @param symbol_ ERC-20 symbol of this token * @param decimals_ ERC-20 decimal precision of this token * @param admin_ Address of the administrator of this token */ constructor(address underlying_, ComptrollerInterface comptroller_, InterestRateModel interestRateModel_, uint initialExchangeRateMantissa_, string memory name_, string memory symbol_, uint8 decimals_, address payable admin_) public { // Creator of the contract is admin during initialization admin = msg.sender; // Initialize the market initialize(underlying_, comptroller_, interestRateModel_, initialExchangeRateMantissa_, name_, symbol_, decimals_); // Set the proper admin now that initialization is done admin = admin_; } } contract CEther is CToken { /** * @notice Construct a new CEther money market * @param comptroller_ The address of the Comptroller * @param interestRateModel_ The address of the interest rate model * @param initialExchangeRateMantissa_ The initial exchange rate, scaled by 1e18 * @param name_ ERC-20 name of this token * @param symbol_ ERC-20 symbol of this token * @param decimals_ ERC-20 decimal precision of this token * @param admin_ Address of the administrator of this token */ constructor(ComptrollerInterface comptroller_, InterestRateModel interestRateModel_, uint initialExchangeRateMantissa_, string memory name_, string memory symbol_, uint8 decimals_, address payable admin_) public { // Creator of the contract is admin during initialization admin = msg.sender; initialize(comptroller_, interestRateModel_, initialExchangeRateMantissa_, name_, symbol_, decimals_); // Set the proper admin now that initialization is done admin = admin_; } /*** User Interface ***/ /** * @notice Sender supplies assets into the market and receives cTokens in exchange * @dev Reverts upon any failure */ function mint() external payable { (uint err,) = mintInternal(msg.value); requireNoError(err, "mint failed"); } /** * @notice Sender redeems cTokens in exchange for the underlying asset * @dev Accrues interest whether or not the operation succeeds, unless reverted * @param redeemTokens The number of cTokens to redeem into underlying * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function redeem(uint redeemTokens) external returns (uint) { return redeemInternal(redeemTokens); } /** * @notice Sender redeems cTokens in exchange for a specified amount of underlying asset * @dev Accrues interest whether or not the operation succeeds, unless reverted * @param redeemAmount The amount of underlying to redeem * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function redeemUnderlying(uint redeemAmount) external returns (uint) { return redeemUnderlyingInternal(redeemAmount); } /** * @notice Sender borrows assets from the protocol to their own address * @param borrowAmount The amount of the underlying asset to borrow * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function borrow(uint borrowAmount) external returns (uint) { return borrowInternal(borrowAmount); } /** * @notice Sender repays their own borrow * @dev Reverts upon any failure */ function repayBorrow() external payable { (uint err,) = repayBorrowInternal(msg.value); requireNoError(err, "repayBorrow failed"); } /** * @notice Sender repays a borrow belonging to borrower * @dev Reverts upon any failure * @param borrower the account with the debt being payed off */ function repayBorrowBehalf(address borrower) external payable { (uint err,) = repayBorrowBehalfInternal(borrower, msg.value); requireNoError(err, "repayBorrowBehalf failed"); } /** * @notice The sender liquidates the borrowers collateral. * The collateral seized is transferred to the liquidator. * @dev Reverts upon any failure * @param borrower The borrower of this cToken to be liquidated * @param cTokenCollateral The market in which to seize collateral from the borrower */ function liquidateBorrow(address borrower, CToken cTokenCollateral) external payable { (uint err,) = liquidateBorrowInternal(borrower, msg.value, cTokenCollateral); requireNoError(err, "liquidateBorrow failed"); } /** * @notice Send Ether to CEther to mint */ function () external payable { (uint err,) = mintInternal(msg.value); requireNoError(err, "mint failed"); } /*** Safe Token ***/ /** * @notice Gets balance of this contract in terms of Ether, before this message * @dev This excludes the value of the current message, if any * @return The quantity of Ether owned by this contract */ function getCashPrior() internal view returns (uint) { (MathError err, uint startingBalance) = subUInt(address(this).balance, msg.value); require(err == MathError.NO_ERROR); return startingBalance; } /** * @notice Perform the actual transfer in, which is a no-op * @param from Address sending the Ether * @param amount Amount of Ether being sent * @return The actual amount of Ether transferred */ function doTransferIn(address from, uint amount) internal returns (uint) { // Sanity checks require(msg.sender == from, "sender mismatch"); require(msg.value == amount, "value mismatch"); return amount; } function doTransferOut(address payable to, uint amount) internal { /* Send the Ether, with minimal gas and revert on failure */ to.transfer(amount); } function requireNoError(uint errCode, string memory message) internal pure { if (errCode == uint(Error.NO_ERROR)) { return; } bytes memory fullMessage = new bytes(bytes(message).length + 5); uint i; for (i = 0; i < bytes(message).length; i++) { fullMessage[i] = bytes(message)[i]; } fullMessage[i+0] = byte(uint8(32)); fullMessage[i+1] = byte(uint8(40)); fullMessage[i+2] = byte(uint8(48 + ( errCode / 10 ))); fullMessage[i+3] = byte(uint8(48 + ( errCode % 10 ))); fullMessage[i+4] = byte(uint8(41)); require(errCode == uint(Error.NO_ERROR), string(fullMessage)); } } contract CDaiDelegate is CErc20Delegate { /** * @notice DAI adapter address */ address public daiJoinAddress; /** * @notice DAI Savings Rate (DSR) pot address */ address public potAddress; /** * @notice DAI vat address */ address public vatAddress; /** * @notice Delegate interface to become the implementation * @param data The encoded arguments for becoming */ function _becomeImplementation(bytes memory data) public { require(msg.sender == admin, "only the admin may initialize the implementation"); (address daiJoinAddress_, address potAddress_) = abi.decode(data, (address, address)); return _becomeImplementation(daiJoinAddress_, potAddress_); } /** * @notice Explicit interface to become the implementation * @param daiJoinAddress_ DAI adapter address * @param potAddress_ DAI Savings Rate (DSR) pot address */ function _becomeImplementation(address daiJoinAddress_, address potAddress_) internal { // Get dai and vat and sanity check the underlying DaiJoinLike daiJoin = DaiJoinLike(daiJoinAddress_); PotLike pot = PotLike(potAddress_); GemLike dai = daiJoin.dai(); VatLike vat = daiJoin.vat(); require(address(dai) == underlying, "DAI must be the same as underlying"); // Remember the relevant addresses daiJoinAddress = daiJoinAddress_; potAddress = potAddress_; vatAddress = address(vat); // Approve moving our DAI into the vat through daiJoin dai.approve(daiJoinAddress, uint(-1)); // Approve the pot to transfer our funds within the vat vat.hope(potAddress); vat.hope(daiJoinAddress); // Accumulate DSR interest -- must do this in order to doTransferIn pot.drip(); // Transfer all cash in (doTransferIn does this regardless of amount) doTransferIn(address(this), 0); } /** * @notice Delegate interface to resign the implementation */ function _resignImplementation() public { require(msg.sender == admin, "only the admin may abandon the implementation"); // Transfer all cash out of the DSR - note that this relies on self-transfer DaiJoinLike daiJoin = DaiJoinLike(daiJoinAddress); PotLike pot = PotLike(potAddress); VatLike vat = VatLike(vatAddress); // Accumulate interest pot.drip(); // Calculate the total amount in the pot, and move it out uint pie = pot.pie(address(this)); pot.exit(pie); // Checks the actual balance of DAI in the vat after the pot exit uint bal = vat.dai(address(this)); // Remove our whole balance daiJoin.exit(address(this), bal / RAY); } /*** CToken Overrides ***/ /** * @notice Accrues DSR then applies accrued interest to total borrows and reserves * @dev This calculates interest accrued from the last checkpointed block * up to the current block and writes new checkpoint to storage. */ function accrueInterest() public returns (uint) { // Accumulate DSR interest PotLike(potAddress).drip(); // Accumulate CToken interest return super.accrueInterest(); } /*** Safe Token ***/ /** * @notice Gets balance of this contract in terms of the underlying * @dev This excludes the value of the current message, if any * @return The quantity of underlying tokens owned by this contract */ function getCashPrior() internal view returns (uint) { PotLike pot = PotLike(potAddress); uint pie = pot.pie(address(this)); return mul(pot.chi(), pie) / RAY; } /** * @notice Transfer the underlying to this contract and sweep into DSR pot * @param from Address to transfer funds from * @param amount Amount of underlying to transfer * @return The actual amount that is transferred */ function doTransferIn(address from, uint amount) internal returns (uint) { // Perform the EIP-20 transfer in EIP20Interface token = EIP20Interface(underlying); require(token.transferFrom(from, address(this), amount), "unexpected EIP-20 transfer in return"); DaiJoinLike daiJoin = DaiJoinLike(daiJoinAddress); GemLike dai = GemLike(underlying); PotLike pot = PotLike(potAddress); VatLike vat = VatLike(vatAddress); // Convert all our DAI to internal DAI in the vat daiJoin.join(address(this), dai.balanceOf(address(this))); // Checks the actual balance of DAI in the vat after the join uint bal = vat.dai(address(this)); // Calculate the percentage increase to th pot for the entire vat, and move it in // Note: We may leave a tiny bit of DAI in the vat...but we do the whole thing every time uint pie = bal / pot.chi(); pot.join(pie); return amount; } /** * @notice Transfer the underlying from this contract, after sweeping out of DSR pot * @param to Address to transfer funds to * @param amount Amount of underlying to transfer */ function doTransferOut(address payable to, uint amount) internal { DaiJoinLike daiJoin = DaiJoinLike(daiJoinAddress); PotLike pot = PotLike(potAddress); // Calculate the percentage decrease from the pot, and move that much out // Note: Use a slightly larger pie size to ensure that we get at least amount in the vat uint pie = add(mul(amount, RAY) / pot.chi(), 1); pot.exit(pie); daiJoin.exit(to, amount); } /*** Maker Internals ***/ uint256 constant RAY = 10 ** 27; function add(uint x, uint y) internal pure returns (uint z) { require((z = x + y) >= x, "add-overflow"); } function mul(uint x, uint y) internal pure returns (uint z) { require(y == 0 || (z = x * y) / y == x, "mul-overflow"); } }

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{"success": true, "error": null, "results": {"detectors": [{"check": "uninitialized-state", "impact": "High", "confidence": "High"}, {"check": "reentrancy-no-eth", "impact": "Medium", "confidence": "Medium"}, {"check": "boolean-cst", "impact": "Medium", "confidence": "Medium"}, {"check": "controlled-delegatecall", "impact": "High", "confidence": "Medium"}, {"check": "erc20-interface", "impact": "Medium", "confidence": "High"}, {"check": "incorrect-equality", "impact": "Medium", "confidence": "High"}, {"check": "uninitialized-local", "impact": "Medium", "confidence": "Medium"}, {"check": "unchecked-transfer", "impact": "High", "confidence": "Medium"}, {"check": "unused-return", "impact": "Medium", "confidence": "Medium"}, {"check": "controlled-array-length", "impact": "High", "confidence": "Medium"}]}}

0x801B4872a635dCCc7E679eEaf04bEf08E562972a

pragma solidity 0.6.12; contract Initializable { /** * @dev Indicates that the contract has been initialized. */ bool private initialized; /** * @dev Indicates that the contract is in the process of being initialized. */ bool private initializing; /** * @dev Modifier to use in the initializer function of a contract. */ modifier initializer() { require(initializing || isConstructor() || !initialized, "Contract instance has already been initialized"); bool isTopLevelCall = !initializing; if (isTopLevelCall) { initializing = true; initialized = true; } _; if (isTopLevelCall) { initializing = false; } } /// @dev Returns true if and only if the function is running in the constructor function isConstructor() private view returns (bool) { // extcodesize checks the size of the code stored in an address, and // address returns the current address. Since the code is still not // deployed when running a constructor, any checks on its code size will // yield zero, making it an effective way to detect if a contract is // under construction or not. address self = address(this); uint256 cs; assembly { cs := extcodesize(self) } return cs == 0; } // Reserved storage space to allow for layout changes in the future. uint256[50] private ______gap; } interface IERC165 { /** * @dev Returns true if this contract implements the interface defined by * `interfaceId`. See the corresponding * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section] * to learn more about how these ids are created. * * This function call must use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool); } interface IERC1820Implementer { /** * @dev Returns a special value (`ERC1820_ACCEPT_MAGIC`) if this contract * implements `interfaceHash` for `account`. * * See {IERC1820Registry-setInterfaceImplementer}. */ function canImplementInterfaceForAddress(bytes32 interfaceHash, address account) external view returns (bytes32); } interface IERC1820Registry { /** * @dev Sets `newManager` as the manager for `account`. A manager of an * account is able to set interface implementers for it. * * By default, each account is its own manager. Passing a value of `0x0` in * `newManager` will reset the manager to this initial state. * * Emits a {ManagerChanged} event. * * Requirements: * * - the caller must be the current manager for `account`. */ function setManager(address account, address newManager) external; /** * @dev Returns the manager for `account`. * * See {setManager}. */ function getManager(address account) external view returns (address); /** * @dev Sets the `implementer` contract as ``account``'s implementer for * `interfaceHash`. * * `account` being the zero address is an alias for the caller's address. * The zero address can also be used in `implementer` to remove an old one. * * See {interfaceHash} to learn how these are created. * * Emits an {InterfaceImplementerSet} event. * * Requirements: * * - the caller must be the current manager for `account`. * - `interfaceHash` must not be an {IERC165} interface id (i.e. it must not * end in 28 zeroes). * - `implementer` must implement {IERC1820Implementer} and return true when * queried for support, unless `implementer` is the caller. See * {IERC1820Implementer-canImplementInterfaceForAddress}. */ function setInterfaceImplementer(address account, bytes32 interfaceHash, address implementer) external; /** * @dev Returns the implementer of `interfaceHash` for `account`. If no such * implementer is registered, returns the zero address. * * If `interfaceHash` is an {IERC165} interface id (i.e. it ends with 28 * zeroes), `account` will be queried for support of it. * * `account` being the zero address is an alias for the caller's address. */ function getInterfaceImplementer(address account, bytes32 interfaceHash) external view returns (address); /** * @dev Returns the interface hash for an `interfaceName`, as defined in the * corresponding * https://eips.ethereum.org/EIPS/eip-1820#interface-name[section of the EIP]. */ function interfaceHash(string calldata interfaceName) external pure returns (bytes32); /** * @notice Updates the cache with whether the contract implements an ERC165 interface or not. * @param account Address of the contract for which to update the cache. * @param interfaceId ERC165 interface for which to update the cache. */ function updateERC165Cache(address account, bytes4 interfaceId) external; /** * @notice Checks whether a contract implements an ERC165 interface or not. * If the result is not cached a direct lookup on the contract address is performed. * If the result is not cached or the cached value is out-of-date, the cache MUST be updated manually by calling * {updateERC165Cache} with the contract address. * @param account Address of the contract to check. * @param interfaceId ERC165 interface to check. * @return True if `account` implements `interfaceId`, false otherwise. */ function implementsERC165Interface(address account, bytes4 interfaceId) external view returns (bool); /** * @notice Checks whether a contract implements an ERC165 interface or not without using nor updating the cache. * @param account Address of the contract to check. * @param interfaceId ERC165 interface to check. * @return True if `account` implements `interfaceId`, false otherwise. */ function implementsERC165InterfaceNoCache(address account, bytes4 interfaceId) external view returns (bool); event InterfaceImplementerSet(address indexed account, bytes32 indexed interfaceHash, address indexed implementer); event ManagerChanged(address indexed account, address indexed newManager); } interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } interface IERC721 is IERC165 { event Transfer(address indexed from, address indexed to, uint256 indexed tokenId); event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId); event ApprovalForAll(address indexed owner, address indexed operator, bool approved); /** * @dev Returns the number of NFTs in ``owner``'s account. */ function balanceOf(address owner) external view returns (uint256 balance); /** * @dev Returns the owner of the NFT specified by `tokenId`. */ function ownerOf(uint256 tokenId) external view returns (address owner); /** * @dev Transfers a specific NFT (`tokenId`) from one account (`from`) to * another (`to`). * * * * Requirements: * - `from`, `to` cannot be zero. * - `tokenId` must be owned by `from`. * - If the caller is not `from`, it must be have been allowed to move this * NFT by either {approve} or {setApprovalForAll}. */ function safeTransferFrom(address from, address to, uint256 tokenId) external; /** * @dev Transfers a specific NFT (`tokenId`) from one account (`from`) to * another (`to`). * * Requirements: * - If the caller is not `from`, it must be approved to move this NFT by * either {approve} or {setApprovalForAll}. */ function transferFrom(address from, address to, uint256 tokenId) external; function approve(address to, uint256 tokenId) external; function getApproved(uint256 tokenId) external view returns (address operator); function setApprovalForAll(address operator, bool _approved) external; function isApprovedForAll(address owner, address operator) external view returns (bool); function safeTransferFrom(address from, address to, uint256 tokenId, bytes calldata data) external; } interface IERC777 { /** * @dev Returns the name of the token. */ function name() external view returns (string memory); /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() external view returns (string memory); /** * @dev Returns the smallest part of the token that is not divisible. This * means all token operations (creation, movement and destruction) must have * amounts that are a multiple of this number. * * For most token contracts, this value will equal 1. */ function granularity() external view returns (uint256); /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by an account (`owner`). */ function balanceOf(address owner) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * If send or receive hooks are registered for the caller and `recipient`, * the corresponding functions will be called with `data` and empty * `operatorData`. See {IERC777Sender} and {IERC777Recipient}. * * Emits a {Sent} event. * * Requirements * * - the caller must have at least `amount` tokens. * - `recipient` cannot be the zero address. * - if `recipient` is a contract, it must implement the {IERC777Recipient} * interface. */ function send(address recipient, uint256 amount, bytes calldata data) external; /** * @dev Destroys `amount` tokens from the caller's account, reducing the * total supply. * * If a send hook is registered for the caller, the corresponding function * will be called with `data` and empty `operatorData`. See {IERC777Sender}. * * Emits a {Burned} event. * * Requirements * * - the caller must have at least `amount` tokens. */ function burn(uint256 amount, bytes calldata data) external; /** * @dev Returns true if an account is an operator of `tokenHolder`. * Operators can send and burn tokens on behalf of their owners. All * accounts are their own operator. * * See {operatorSend} and {operatorBurn}. */ function isOperatorFor(address operator, address tokenHolder) external view returns (bool); /** * @dev Make an account an operator of the caller. * * See {isOperatorFor}. * * Emits an {AuthorizedOperator} event. * * Requirements * * - `operator` cannot be calling address. */ function authorizeOperator(address operator) external; /** * @dev Revoke an account's operator status for the caller. * * See {isOperatorFor} and {defaultOperators}. * * Emits a {RevokedOperator} event. * * Requirements * * - `operator` cannot be calling address. */ function revokeOperator(address operator) external; /** * @dev Returns the list of default operators. These accounts are operators * for all token holders, even if {authorizeOperator} was never called on * them. * * This list is immutable, but individual holders may revoke these via * {revokeOperator}, in which case {isOperatorFor} will return false. */ function defaultOperators() external view returns (address[] memory); /** * @dev Moves `amount` tokens from `sender` to `recipient`. The caller must * be an operator of `sender`. * * If send or receive hooks are registered for `sender` and `recipient`, * the corresponding functions will be called with `data` and * `operatorData`. See {IERC777Sender} and {IERC777Recipient}. * * Emits a {Sent} event. * * Requirements * * - `sender` cannot be the zero address. * - `sender` must have at least `amount` tokens. * - the caller must be an operator for `sender`. * - `recipient` cannot be the zero address. * - if `recipient` is a contract, it must implement the {IERC777Recipient} * interface. */ function operatorSend( address sender, address recipient, uint256 amount, bytes calldata data, bytes calldata operatorData ) external; /** * @dev Destroys `amount` tokens from `account`, reducing the total supply. * The caller must be an operator of `account`. * * If a send hook is registered for `account`, the corresponding function * will be called with `data` and `operatorData`. See {IERC777Sender}. * * Emits a {Burned} event. * * Requirements * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. * - the caller must be an operator for `account`. */ function operatorBurn( address account, uint256 amount, bytes calldata data, bytes calldata operatorData ) external; event Sent( address indexed operator, address indexed from, address indexed to, uint256 amount, bytes data, bytes operatorData ); event Minted(address indexed operator, address indexed to, uint256 amount, bytes data, bytes operatorData); event Burned(address indexed operator, address indexed from, uint256 amount, bytes data, bytes operatorData); event AuthorizedOperator(address indexed operator, address indexed tokenHolder); event RevokedOperator(address indexed operator, address indexed tokenHolder); } interface IERC777Recipient { /** * @dev Called by an {IERC777} token contract whenever tokens are being * moved or created into a registered account (`to`). The type of operation * is conveyed by `from` being the zero address or not. * * This call occurs _after_ the token contract's state is updated, so * {IERC777-balanceOf}, etc., can be used to query the post-operation state. * * This function may revert to prevent the operation from being executed. */ function tokensReceived( address operator, address from, address to, uint256 amount, bytes calldata userData, bytes calldata operatorData ) external; } interface IERC777Sender { /** * @dev Called by an {IERC777} token contract whenever a registered holder's * (`from`) tokens are about to be moved or destroyed. The type of operation * is conveyed by `to` being the zero address or not. * * This call occurs _before_ the token contract's state is updated, so * {IERC777-balanceOf}, etc., can be used to query the pre-operation state. * * This function may revert to prevent the operation from being executed. */ function tokensToSend( address operator, address from, address to, uint256 amount, bytes calldata userData, bytes calldata operatorData ) external; } interface PodInterface { function tokenToCollateralValue(uint256 tokens) external view returns (uint256); function balanceOfUnderlying(address user) external view returns (uint256); } contract ContextUpgradeSafe is Initializable { // Empty internal constructor, to prevent people from mistakenly deploying // an instance of this contract, which should be used via inheritance. function __Context_init() internal initializer { __Context_init_unchained(); } function __Context_init_unchained() internal initializer { } function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } uint256[50] private __gap; } contract OwnableUpgradeSafe is Initializable, ContextUpgradeSafe { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ function __Ownable_init() internal initializer { __Context_init_unchained(); __Ownable_init_unchained(); } function __Ownable_init_unchained() internal initializer { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), msgSender); } /** * @dev Returns the address of the current owner. */ function owner() public view returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(_owner == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { emit OwnershipTransferred(_owner, address(0)); _owner = address(0); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } uint256[49] private __gap; } contract MigrateV2ToV3 is OwnableUpgradeSafe, IERC777Recipient, IERC1820Implementer { IERC1820Registry constant internal ERC1820_REGISTRY = IERC1820Registry(0x1820a4B7618BdE71Dce8cdc73aAB6C95905faD24); bytes32 constant private _ERC1820_ACCEPT_MAGIC = keccak256(abi.encodePacked("ERC1820_ACCEPT_MAGIC")); // keccak256("ERC777TokensRecipient") bytes32 constant internal TOKENS_RECIPIENT_INTERFACE_HASH = 0xb281fc8c12954d22544db45de3159a39272895b169a852b314f9cc762e44c53b; event ReceivedTokens(address token, address from, uint256 amount); IERC777 public poolDaiToken; IERC777 public poolUsdcToken; MixedPodInterface public poolDaiPod; MixedPodInterface public poolUsdcPod; IERC20 public v3Token; constructor ( IERC777 _poolDaiToken, IERC777 _poolUsdcToken, MixedPodInterface _poolDaiPod, MixedPodInterface _poolUsdcPod, IERC20 _v3Token ) public { poolDaiToken = _poolDaiToken; poolUsdcToken = _poolUsdcToken; poolDaiPod = _poolDaiPod; poolUsdcPod = _poolUsdcPod; v3Token = _v3Token; // register interfaces ERC1820_REGISTRY.setInterfaceImplementer(address(this), TOKENS_RECIPIENT_INTERFACE_HASH, address(this)); __Ownable_init(); } function tokensReceived( address, address from, address to, uint256 amount, bytes calldata, bytes calldata ) external override { require(to == address(this), "MigrateV2ToV3/only-tokens"); if (msg.sender == address(poolDaiToken)) { v3Token.transfer(from, amount); } else if (msg.sender == address(poolUsdcToken)) { v3Token.transfer(from, amount * 1e12); } else if (msg.sender == address(poolDaiPod)) { uint256 collateral = poolDaiPod.tokenToCollateralValue(amount); v3Token.transfer(from, collateral); } else if (msg.sender == address(poolUsdcPod)) { uint256 collateral = poolUsdcPod.tokenToCollateralValue(amount); v3Token.transfer(from, collateral * 1e12); } else { revert("MigrateV2ToV3/unknown-token"); } emit ReceivedTokens(msg.sender, from, amount); } function withdrawERC777(IERC777 token) external onlyOwner { uint256 amount = token.balanceOf(address(this)); token.send(msg.sender, amount, ""); } function withdrawERC20(IERC20 token) external onlyOwner { uint256 amount = token.balanceOf(address(this)); token.transfer(msg.sender, amount); } function withdrawERC721(IERC721 token, uint256 id) external onlyOwner { IERC721(token).transferFrom(address(this), msg.sender, id); } function canImplementInterfaceForAddress(bytes32 interfaceHash, address account) external override view returns (bytes32) { if (account == address(this) && interfaceHash == TOKENS_RECIPIENT_INTERFACE_HASH) { return _ERC1820_ACCEPT_MAGIC; } else { return bytes32(0x00); } } } interface MixedPodInterface is IERC777, PodInterface { }

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{"success": true, "error": null, "results": {"detectors": [{"check": "unchecked-transfer", "impact": "High", "confidence": "Medium"}]}}

0x80504F30f38b4149D95faE61BdE9F3Ee204ea9d5

pragma solidity 0.6.5; abstract contract ERC20 { using SafeMath for uint256; uint256 internal _totalSupply; mapping(address => uint256) internal _balances; mapping(address => mapping(address => uint256)) internal _allowances; event Transfer(address indexed from, address indexed to, uint256 amount); event Approval( address indexed owner, address indexed spender, uint256 amount ); /* * Internal Functions for ERC20 standard logics */ function _transfer(address from, address to, uint256 amount) internal returns (bool success) { _balances[from] = _balances[from].sub( amount, "ERC20/transfer : cannot transfer more than token owner balance" ); _balances[to] = _balances[to].add(amount); emit Transfer(from, to, amount); success = true; } function _approve(address owner, address spender, uint256 amount) internal returns (bool success) { _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); success = true; } function _mint(address recipient, uint256 amount) internal returns (bool success) { _totalSupply = _totalSupply.add(amount); _balances[recipient] = _balances[recipient].add(amount); emit Transfer(address(0), recipient, amount); success = true; } function _burn(address burned, uint256 amount) internal returns (bool success) { _balances[burned] = _balances[burned].sub( amount, "ERC20Burnable/burn : Cannot burn more than user's balance" ); _totalSupply = _totalSupply.sub( amount, "ERC20Burnable/burn : Cannot burn more than totalSupply" ); emit Transfer(burned, address(0), amount); success = true; } /* * public view functions to view common data */ function totalSupply() external view returns (uint256 total) { total = _totalSupply; } function balanceOf(address owner) external view returns (uint256 balance) { balance = _balances[owner]; } function allowance(address owner, address spender) external view returns (uint256 remaining) { remaining = _allowances[owner][spender]; } /* * External view Function Interface to implement on final contract */ function name() virtual external view returns (string memory tokenName); function symbol() virtual external view returns (string memory tokenSymbol); function decimals() virtual external view returns (uint8 tokenDecimals); /* * External Function Interface to implement on final contract */ function transfer(address to, uint256 amount) virtual external returns (bool success); function transferFrom(address from, address to, uint256 amount) virtual external returns (bool success); function approve(address spender, uint256 amount) virtual external returns (bool success); } contract Ownable { address internal _owner; event OwnershipTransferred( address indexed currentOwner, address indexed newOwner ); constructor() internal { _owner = msg.sender; emit OwnershipTransferred(address(0), msg.sender); } modifier onlyOwner() { require( msg.sender == _owner, "Ownable : Function called by unauthorized user." ); _; } function owner() external view returns (address ownerAddress) { ownerAddress = _owner; } function transferOwnership(address newOwner) public onlyOwner returns (bool success) { require(newOwner != address(0), "Ownable/transferOwnership : cannot transfer ownership to zero address"); success = _transferOwnership(newOwner); } function renounceOwnership() external onlyOwner returns (bool success) { success = _transferOwnership(address(0)); } function _transferOwnership(address newOwner) internal returns (bool success) { emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; success = true; } } contract Pausable is Ownable { bool internal _paused; event Paused(); event Unpaused(); modifier whenPaused() { require(_paused, "Paused : This function can only be called when paused"); _; } modifier whenNotPaused() { require(!_paused, "Paused : This function can only be called when not paused"); _; } function pause() external onlyOwner whenNotPaused returns (bool success) { _paused = true; emit Paused(); success = true; } function unPause() external onlyOwner whenPaused returns (bool success) { _paused = false; emit Unpaused(); success = true; } function paused() external view returns (bool) { return _paused; } } library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot overflow. * * _Available since v2.4.0._ */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. * * _Available since v2.4.0._ */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { // Solidity only automatically asserts when dividing by 0 require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. * * _Available since v2.4.0._ */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } abstract contract ERC20Burnable is ERC20, Pausable { event Burn(address indexed burned, uint256 amount); function burn(uint256 amount) external whenNotPaused returns (bool success) { success = _burn(msg.sender, amount); emit Burn(msg.sender, amount); success = true; } function burnFrom(address burned, uint256 amount) external whenNotPaused returns (bool success) { _burn(burned, amount); emit Burn(burned, amount); success = _approve( burned, msg.sender, _allowances[burned][msg.sender].sub( amount, "ERC20Burnable/burnFrom : Cannot burn more than allowance" ) ); } } abstract contract ERC20Lockable is ERC20, Ownable { struct LockInfo { uint256 amount; uint256 due; } mapping(address => LockInfo[]) internal _locks; mapping(address => uint256) internal _totalLocked; event Lock(address indexed from, uint256 amount, uint256 due); event Unlock(address indexed from, uint256 amount); modifier checkLock(address from, uint256 amount) { require(_balances[from] >= _totalLocked[from].add(amount), "ERC20Lockable/Cannot send more than unlocked amount"); _; } function _lock(address from, uint256 amount, uint256 due) internal returns (bool success) { require(due > now, "ERC20Lockable/lock : Cannot set due to past"); require( _balances[from] >= amount.add(_totalLocked[from]), "ERC20Lockable/lock : locked total should be smaller than balance" ); _totalLocked[from] = _totalLocked[from].add(amount); _locks[from].push(LockInfo(amount, due)); emit Lock(from, amount, due); success = true; } function _unlock(address from, uint256 index) internal returns (bool success) { LockInfo storage lock = _locks[from][index]; _totalLocked[from] = _totalLocked[from].sub(lock.amount); emit Unlock(from, lock.amount); _locks[from][index] = _locks[from][_locks[from].length - 1]; _locks[from].pop(); success = true; } function unlock(address from) external returns (bool success) { for(uint256 i = 0; i < _locks[from].length; i++){ if(_locks[from][i].due < now){ _unlock(from, i); } } success = true; } function releaseLock(address from) external onlyOwner returns (bool success) { for(uint256 i = 0; i < _locks[from].length; i++){ _unlock(from, i); } success = true; } function transferWithLockUp(address recipient, uint256 amount, uint256 due) external returns (bool success) { require( recipient != address(0), "ERC20Lockable/transferWithLockUp : Cannot send to zero address" ); _transfer(msg.sender, recipient, amount); _lock(recipient, amount, due); success = true; } function lockInfo(address locked, uint256 index) external view returns (uint256 amount, uint256 due) { LockInfo memory lock = _locks[locked][index]; amount = lock.amount; due = lock.due; } function totalLocked(address locked) external view returns(uint256 amount, uint256 length){ amount = _totalLocked[locked]; length = _locks[locked].length; } } abstract contract ERC20Mintable is ERC20, Pausable { event Mint(address indexed receiver, uint256 amount); event MintFinished(); uint256 internal _cap; bool internal _mintingFinished; ///@notice mint token ///@dev only owner can call this function function mint(address receiver, uint256 amount) external onlyOwner whenNotPaused returns (bool success) { require( receiver != address(0), "ERC20Mintable/mint : Should not mint to zero address" ); require( _totalSupply.add(amount) <= _cap, "ERC20Mintable/mint : Cannot mint over cap" ); require( !_mintingFinished, "ERC20Mintable/mint : Cannot mint after finished" ); _mint(receiver, amount); emit Mint(receiver, amount); success = true; } ///@notice finish minting, cannot mint after calling this function ///@dev only owner can call this function function finishMint() external onlyOwner returns (bool success) { require( !_mintingFinished, "ERC20Mintable/finishMinting : Already finished" ); _mintingFinished = true; emit MintFinished(); return true; } function cap() external view returns (uint256) { return _cap; } function isFinished() external view returns(bool finished) { finished = _mintingFinished; } } contract Freezable is Ownable { mapping(address => bool) private _frozen; event Freeze(address indexed target); event Unfreeze(address indexed target); modifier whenNotFrozen(address target) { require(!_frozen[target], "Freezable : target is frozen"); _; } function freeze(address target) external onlyOwner returns (bool success) { _frozen[target] = true; emit Freeze(target); success = true; } function unFreeze(address target) external onlyOwner returns (bool success) { _frozen[target] = false; emit Unfreeze(target); success = true; } function isFrozen(address target) external view returns (bool frozen) { return _frozen[target]; } } contract Daon is ERC20Lockable, ERC20Burnable, ERC20Mintable, Freezable { string constant private _name = "Daon"; string constant private _symbol = "DEB"; uint8 constant private _decimals = 5; uint256 constant private _initial_supply = 2_000_000_000; constructor() public Ownable() { _cap = 10_000_000_000 * (10**uint256(_decimals)); _mint(msg.sender, _initial_supply * (10**uint256(_decimals))); } function transfer(address to, uint256 amount) override external whenNotFrozen(msg.sender) whenNotPaused checkLock(msg.sender, amount) returns (bool success) { require( to != address(0), "DEB/transfer : Should not send to zero address" ); _transfer(msg.sender, to, amount); success = true; } function transferFrom(address from, address to, uint256 amount) override external whenNotFrozen(from) whenNotPaused checkLock(from, amount) returns (bool success) { require( to != address(0), "DEB/transferFrom : Should not send to zero address" ); _transfer(from, to, amount); _approve( from, msg.sender, _allowances[from][msg.sender].sub( amount, "DEB/transferFrom : Cannot send more than allowance" ) ); success = true; } function approve(address spender, uint256 amount) override external returns (bool success) { require( spender != address(0), "DEB/approve : Should not approve zero address" ); _approve(msg.sender, spender, amount); success = true; } function name() override external view returns (string memory tokenName) { tokenName = _name; } function symbol() override external view returns (string memory tokenSymbol) { tokenSymbol = _symbol; } function decimals() override external view returns (uint8 tokenDecimals) { tokenDecimals = _decimals; } }

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{"success": true, "error": null, "results": {"detectors": [{"check": "write-after-write", "impact": "Medium", "confidence": "High"}]}}

0x80dc6DBE106A1cC8c8b8553a96C3Bf8162850452

pragma solidity 0.6.12; abstract contract Context { function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } interface IContractRegistry { event ContractAddressUpdated(string contractName, address addr, bool managedContract); event ManagerChanged(string role, address newManager); event ContractRegistryUpdated(address newContractRegistry); /* * External functions */ /// @dev updates the contracts address and emits a corresponding event /// managedContract indicates whether the contract is managed by the registry and notified on changes function setContract(string calldata contractName, address addr, bool managedContract) external /* onlyAdmin */; /// @dev returns the current address of the given contracts function getContract(string calldata contractName) external view returns (address); /// @dev returns the list of contract addresses managed by the registry function getManagedContracts() external view returns (address[] memory); function setManager(string calldata role, address manager) external /* onlyAdmin */; function getManager(string calldata role) external view returns (address); function lockContracts() external /* onlyAdmin */; function unlockContracts() external /* onlyAdmin */; function setNewContractRegistry(IContractRegistry newRegistry) external /* onlyAdmin */; function getPreviousContractRegistry() external view returns (address); } interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } interface IFeesWallet { event FeesWithdrawnFromBucket(uint256 bucketId, uint256 withdrawn, uint256 total); event FeesAddedToBucket(uint256 bucketId, uint256 added, uint256 total); /* * External methods */ /// @dev Called by: subscriptions contract. /// Top-ups the fee pool with the given amount at the given rate (typically called by the subscriptions contract). function fillFeeBuckets(uint256 amount, uint256 monthlyRate, uint256 fromTimestamp) external; /// @dev collect fees from the buckets since the last call and transfers the amount back. /// Called by: only Rewards contract. function collectFees() external returns (uint256 collectedFees) /* onlyRewardsContract */; /// @dev Returns the amount of fees that are currently available for withdrawal function getOutstandingFees() external view returns (uint256 outstandingFees); /* * General governance */ event EmergencyWithdrawal(address addr); /// @dev migrates the fees of bucket starting at startTimestamp. /// bucketStartTime must be a bucket's start time. /// Calls acceptBucketMigration in the destination contract. function migrateBucket(IMigratableFeesWallet destination, uint256 bucketStartTime) external /* onlyMigrationManager */; /// @dev Called by the old FeesWallet contract. /// Part of the IMigratableFeesWallet interface. function acceptBucketMigration(uint256 bucketStartTime, uint256 amount) external; /// @dev an emergency withdrawal enables withdrawal of all funds to an escrow account. To be use in emergencies only. function emergencyWithdraw() external /* onlyMigrationManager */; } interface ILockable { event Locked(); event Unlocked(); function lock() external /* onlyLockOwner */; function unlock() external /* onlyLockOwner */; function isLocked() view external returns (bool); } interface IMigratableFeesWallet { /// @dev receives a bucket start time and an amount function acceptBucketMigration(uint256 bucketStartTime, uint256 amount) external; } contract Initializable { address private _initializationAdmin; event InitializationComplete(); constructor() public{ _initializationAdmin = msg.sender; } modifier onlyInitializationAdmin() { require(msg.sender == initializationAdmin(), "sender is not the initialization admin"); _; } /* * External functions */ function initializationAdmin() public view returns (address) { return _initializationAdmin; } function initializationComplete() external onlyInitializationAdmin { _initializationAdmin = address(0); emit InitializationComplete(); } function isInitializationComplete() public view returns (bool) { return _initializationAdmin == address(0); } } library Math { /** * @dev Returns the largest of two numbers. */ function max(uint256 a, uint256 b) internal pure returns (uint256) { return a >= b ? a : b; } /** * @dev Returns the smallest of two numbers. */ function min(uint256 a, uint256 b) internal pure returns (uint256) { return a < b ? a : b; } /** * @dev Returns the average of two numbers. The result is rounded towards * zero. */ function average(uint256 a, uint256 b) internal pure returns (uint256) { // (a + b) / 2 can overflow, so we distribute return (a / 2) + (b / 2) + ((a % 2 + b % 2) / 2); } } library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } contract WithClaimableRegistryManagement is Context { address private _registryAdmin; address private _pendingRegistryAdmin; event RegistryManagementTransferred(address indexed previousRegistryAdmin, address indexed newRegistryAdmin); /** * @dev Initializes the contract setting the deployer as the initial registryRegistryAdmin. */ constructor () internal { address msgSender = _msgSender(); _registryAdmin = msgSender; emit RegistryManagementTransferred(address(0), msgSender); } /** * @dev Returns the address of the current registryAdmin. */ function registryAdmin() public view returns (address) { return _registryAdmin; } /** * @dev Throws if called by any account other than the registryAdmin. */ modifier onlyRegistryAdmin() { require(isRegistryAdmin(), "WithClaimableRegistryManagement: caller is not the registryAdmin"); _; } /** * @dev Returns true if the caller is the current registryAdmin. */ function isRegistryAdmin() public view returns (bool) { return _msgSender() == _registryAdmin; } /** * @dev Leaves the contract without registryAdmin. It will not be possible to call * `onlyManager` functions anymore. Can only be called by the current registryAdmin. * * NOTE: Renouncing registryManagement will leave the contract without an registryAdmin, * thereby removing any functionality that is only available to the registryAdmin. */ function renounceRegistryManagement() public onlyRegistryAdmin { emit RegistryManagementTransferred(_registryAdmin, address(0)); _registryAdmin = address(0); } /** * @dev Transfers registryManagement of the contract to a new account (`newManager`). */ function _transferRegistryManagement(address newRegistryAdmin) internal { require(newRegistryAdmin != address(0), "RegistryAdmin: new registryAdmin is the zero address"); emit RegistryManagementTransferred(_registryAdmin, newRegistryAdmin); _registryAdmin = newRegistryAdmin; } /** * @dev Modifier throws if called by any account other than the pendingManager. */ modifier onlyPendingRegistryAdmin() { require(msg.sender == _pendingRegistryAdmin, "Caller is not the pending registryAdmin"); _; } /** * @dev Allows the current registryAdmin to set the pendingManager address. * @param newRegistryAdmin The address to transfer registryManagement to. */ function transferRegistryManagement(address newRegistryAdmin) public onlyRegistryAdmin { _pendingRegistryAdmin = newRegistryAdmin; } /** * @dev Allows the _pendingRegistryAdmin address to finalize the transfer. */ function claimRegistryManagement() external onlyPendingRegistryAdmin { _transferRegistryManagement(_pendingRegistryAdmin); _pendingRegistryAdmin = address(0); } /** * @dev Returns the current pendingRegistryAdmin */ function pendingRegistryAdmin() public view returns (address) { return _pendingRegistryAdmin; } } contract ContractRegistryAccessor is WithClaimableRegistryManagement, Initializable { IContractRegistry private contractRegistry; constructor(IContractRegistry _contractRegistry, address _registryAdmin) public { require(address(_contractRegistry) != address(0), "_contractRegistry cannot be 0"); setContractRegistry(_contractRegistry); _transferRegistryManagement(_registryAdmin); } modifier onlyAdmin { require(isAdmin(), "sender is not an admin (registryManger or initializationAdmin)"); _; } function isManager(string memory role) internal view returns (bool) { IContractRegistry _contractRegistry = contractRegistry; return isAdmin() || _contractRegistry != IContractRegistry(0) && contractRegistry.getManager(role) == msg.sender; } function isAdmin() internal view returns (bool) { return msg.sender == registryAdmin() || msg.sender == initializationAdmin() || msg.sender == address(contractRegistry); } function getProtocolContract() internal view returns (address) { return contractRegistry.getContract("protocol"); } function getStakingRewardsContract() internal view returns (address) { return contractRegistry.getContract("stakingRewards"); } function getFeesAndBootstrapRewardsContract() internal view returns (address) { return contractRegistry.getContract("feesAndBootstrapRewards"); } function getCommitteeContract() internal view returns (address) { return contractRegistry.getContract("committee"); } function getElectionsContract() internal view returns (address) { return contractRegistry.getContract("elections"); } function getDelegationsContract() internal view returns (address) { return contractRegistry.getContract("delegations"); } function getGuardiansRegistrationContract() internal view returns (address) { return contractRegistry.getContract("guardiansRegistration"); } function getCertificationContract() internal view returns (address) { return contractRegistry.getContract("certification"); } function getStakingContract() internal view returns (address) { return contractRegistry.getContract("staking"); } function getSubscriptionsContract() internal view returns (address) { return contractRegistry.getContract("subscriptions"); } function getStakingRewardsWallet() internal view returns (address) { return contractRegistry.getContract("stakingRewardsWallet"); } function getBootstrapRewardsWallet() internal view returns (address) { return contractRegistry.getContract("bootstrapRewardsWallet"); } function getGeneralFeesWallet() internal view returns (address) { return contractRegistry.getContract("generalFeesWallet"); } function getCertifiedFeesWallet() internal view returns (address) { return contractRegistry.getContract("certifiedFeesWallet"); } function getStakingContractHandler() internal view returns (address) { return contractRegistry.getContract("stakingContractHandler"); } /* * Governance functions */ event ContractRegistryAddressUpdated(address addr); function setContractRegistry(IContractRegistry newContractRegistry) public onlyAdmin { require(newContractRegistry.getPreviousContractRegistry() == address(contractRegistry), "new contract registry must provide the previous contract registry"); contractRegistry = newContractRegistry; emit ContractRegistryAddressUpdated(address(newContractRegistry)); } function getContractRegistry() public view returns (IContractRegistry) { return contractRegistry; } } contract Lockable is ILockable, ContractRegistryAccessor { bool public locked; constructor(IContractRegistry _contractRegistry, address _registryAdmin) ContractRegistryAccessor(_contractRegistry, _registryAdmin) public {} modifier onlyLockOwner() { require(msg.sender == registryAdmin() || msg.sender == address(getContractRegistry()), "caller is not a lock owner"); _; } function lock() external override onlyLockOwner { locked = true; emit Locked(); } function unlock() external override onlyLockOwner { locked = false; emit Unlocked(); } function isLocked() external override view returns (bool) { return locked; } modifier onlyWhenActive() { require(!locked, "contract is locked for this operation"); _; } } contract ManagedContract is Lockable { constructor(IContractRegistry _contractRegistry, address _registryAdmin) Lockable(_contractRegistry, _registryAdmin) public {} modifier onlyMigrationManager { require(isManager("migrationManager"), "sender is not the migration manager"); _; } modifier onlyFunctionalManager { require(isManager("functionalManager"), "sender is not the functional manager"); _; } function refreshContracts() virtual external {} } contract FeesWallet is IFeesWallet, ManagedContract { using SafeMath for uint256; uint256 constant BUCKET_TIME_PERIOD = 30 days; uint constant MAX_FEE_BUCKET_ITERATIONS = 24; IERC20 public token; mapping(uint256 => uint256) public buckets; uint256 public lastCollectedAt; constructor(IContractRegistry _contractRegistry, address _registryAdmin, IERC20 _token) ManagedContract(_contractRegistry, _registryAdmin) public { token = _token; lastCollectedAt = now; } modifier onlyRewardsContract() { require(msg.sender == rewardsContract, "caller is not the rewards contract"); _; } /* * External methods */ /// @dev collect fees from the buckets since the last call and transfers the amount back. /// Called by: only Rewards contract. function collectFees() external override onlyRewardsContract returns (uint256 collectedFees) { (uint256 _collectedFees, uint[] memory bucketsWithdrawn, uint[] memory amountsWithdrawn, uint[] memory newTotals) = _getOutstandingFees(); for (uint i = 0; i < bucketsWithdrawn.length; i++) { buckets[bucketsWithdrawn[i]] = newTotals[i]; emit FeesWithdrawnFromBucket(bucketsWithdrawn[i], amountsWithdrawn[i], newTotals[i]); } lastCollectedAt = block.timestamp; require(token.transfer(msg.sender, _collectedFees), "FeesWallet::failed to transfer collected fees to rewards"); // TODO in that case, transfer the remaining balance? return _collectedFees; } function getOutstandingFees() external override view returns (uint256 outstandingFees) { (outstandingFees,,,) = _getOutstandingFees(); } /// @dev Called by: subscriptions contract. /// Top-ups the fee pool with the given amount at the given rate (typically called by the subscriptions contract). function fillFeeBuckets(uint256 amount, uint256 monthlyRate, uint256 fromTimestamp) external override onlyWhenActive { uint256 bucket = _bucketTime(fromTimestamp); require(bucket >= _bucketTime(block.timestamp), "FeeWallet::cannot fill bucket from the past"); uint256 _amount = amount; // add the partial amount to the first bucket uint256 bucketAmount = Math.min(amount, monthlyRate.mul(BUCKET_TIME_PERIOD - fromTimestamp % BUCKET_TIME_PERIOD).div(BUCKET_TIME_PERIOD)); fillFeeBucket(bucket, bucketAmount); _amount = _amount.sub(bucketAmount); // following buckets are added with the monthly rate while (_amount > 0) { bucket = bucket.add(BUCKET_TIME_PERIOD); bucketAmount = Math.min(monthlyRate, _amount); fillFeeBucket(bucket, bucketAmount); _amount = _amount.sub(bucketAmount); } require(token.transferFrom(msg.sender, address(this), amount), "failed to transfer fees into fee wallet"); } /* * Governance functions */ /// @dev migrates the fees of bucket starting at startTimestamp. /// bucketStartTime must be a bucket's start time. /// Calls acceptBucketMigration in the destination contract. function migrateBucket(IMigratableFeesWallet destination, uint256 bucketStartTime) external override onlyMigrationManager { require(_bucketTime(bucketStartTime) == bucketStartTime, "bucketStartTime must be the start time of a bucket"); uint bucketAmount = buckets[bucketStartTime]; if (bucketAmount == 0) return; buckets[bucketStartTime] = 0; emit FeesWithdrawnFromBucket(bucketStartTime, bucketAmount, 0); token.approve(address(destination), bucketAmount); destination.acceptBucketMigration(bucketStartTime, bucketAmount); } /// @dev Called by the old FeesWallet contract. /// Part of the IMigratableFeesWallet interface. function acceptBucketMigration(uint256 bucketStartTime, uint256 amount) external override { require(_bucketTime(bucketStartTime) == bucketStartTime, "bucketStartTime must be the start time of a bucket"); fillFeeBucket(bucketStartTime, amount); require(token.transferFrom(msg.sender, address(this), amount), "failed to transfer fees into fee wallet on bucket migration"); } /// @dev an emergency withdrawal enables withdrawal of all funds to an escrow account. To be use in emergencies only. function emergencyWithdraw() external override onlyMigrationManager { emit EmergencyWithdrawal(msg.sender); require(token.transfer(msg.sender, token.balanceOf(address(this))), "IFeesWallet::emergencyWithdraw - transfer failed (fee token)"); } /* * Private methods */ function fillFeeBucket(uint256 bucketId, uint256 amount) private { uint256 bucketTotal = buckets[bucketId].add(amount); buckets[bucketId] = bucketTotal; emit FeesAddedToBucket(bucketId, amount, bucketTotal); } function _getOutstandingFees() private view returns (uint256 outstandingFees, uint[] memory bucketsWithdrawn, uint[] memory withdrawnAmounts, uint[] memory newTotals) { // TODO we often do integer division for rate related calculation, which floors the result. Do we need to address this? // TODO for an empty committee or a committee with 0 total stake the divided amounts will be locked in the contract FOREVER // Fee pool uint _lastCollectedAt = lastCollectedAt; uint nUpdatedBuckets = _bucketTime(block.timestamp).sub(_bucketTime(_lastCollectedAt)).div(BUCKET_TIME_PERIOD).add(1); bucketsWithdrawn = new uint[](nUpdatedBuckets); withdrawnAmounts = new uint[](nUpdatedBuckets); newTotals = new uint[](nUpdatedBuckets); uint bucketsPayed = 0; while (bucketsPayed < MAX_FEE_BUCKET_ITERATIONS && _lastCollectedAt < block.timestamp) { uint256 bucketStart = _bucketTime(_lastCollectedAt); uint256 bucketEnd = bucketStart.add(BUCKET_TIME_PERIOD); uint256 payUntil = Math.min(bucketEnd, block.timestamp); uint256 bucketDuration = payUntil.sub(_lastCollectedAt); uint256 remainingBucketTime = bucketEnd.sub(_lastCollectedAt); uint256 bucketTotal = buckets[bucketStart]; uint256 amount = bucketTotal * bucketDuration / remainingBucketTime; outstandingFees += amount; bucketTotal = bucketTotal.sub(amount); bucketsWithdrawn[bucketsPayed] = bucketStart; withdrawnAmounts[bucketsPayed] = amount; newTotals[bucketsPayed] = bucketTotal; _lastCollectedAt = payUntil; bucketsPayed++; } } function _bucketTime(uint256 time) private pure returns (uint256) { return time - time % BUCKET_TIME_PERIOD; } /* * Contracts topology / registry interface */ address rewardsContract; function refreshContracts() external override { rewardsContract = getFeesAndBootstrapRewardsContract(); } }

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{"success": true, "error": null, "results": {"detectors": [{"check": "weak-prng", "impact": "High", "confidence": "Medium"}, {"check": "incorrect-equality", "impact": "Medium", "confidence": "High"}, {"check": "unused-return", "impact": "Medium", "confidence": "Medium"}]}}

0x8109dfb06d4d9e694a8349b855cbf493a0b22186

pragma solidity 0.6.12; interface IERC1820Registry { /** * @dev Sets `newManager` as the manager for `account`. A manager of an * account is able to set interface implementers for it. * * By default, each account is its own manager. Passing a value of `0x0` in * `newManager` will reset the manager to this initial state. * * Emits a {ManagerChanged} event. * * Requirements: * * - the caller must be the current manager for `account`. */ function setManager(address account, address newManager) external; /** * @dev Returns the manager for `account`. * * See {setManager}. */ function getManager(address account) external view returns (address); /** * @dev Sets the `implementer` contract as ``account``'s implementer for * `interfaceHash`. * * `account` being the zero address is an alias for the caller's address. * The zero address can also be used in `implementer` to remove an old one. * * See {interfaceHash} to learn how these are created. * * Emits an {InterfaceImplementerSet} event. * * Requirements: * * - the caller must be the current manager for `account`. * - `interfaceHash` must not be an {IERC165} interface id (i.e. it must not * end in 28 zeroes). * - `implementer` must implement {IERC1820Implementer} and return true when * queried for support, unless `implementer` is the caller. See * {IERC1820Implementer-canImplementInterfaceForAddress}. */ function setInterfaceImplementer(address account, bytes32 interfaceHash, address implementer) external; /** * @dev Returns the implementer of `interfaceHash` for `account`. If no such * implementer is registered, returns the zero address. * * If `interfaceHash` is an {IERC165} interface id (i.e. it ends with 28 * zeroes), `account` will be queried for support of it. * * `account` being the zero address is an alias for the caller's address. */ function getInterfaceImplementer(address account, bytes32 interfaceHash) external view returns (address); /** * @dev Returns the interface hash for an `interfaceName`, as defined in the * corresponding * https://eips.ethereum.org/EIPS/eip-1820#interface-name[section of the EIP]. */ function interfaceHash(string calldata interfaceName) external pure returns (bytes32); /** * @notice Updates the cache with whether the contract implements an ERC165 interface or not. * @param account Address of the contract for which to update the cache. * @param interfaceId ERC165 interface for which to update the cache. */ function updateERC165Cache(address account, bytes4 interfaceId) external; /** * @notice Checks whether a contract implements an ERC165 interface or not. * If the result is not cached a direct lookup on the contract address is performed. * If the result is not cached or the cached value is out-of-date, the cache MUST be updated manually by calling * {updateERC165Cache} with the contract address. * @param account Address of the contract to check. * @param interfaceId ERC165 interface to check. * @return True if `account` implements `interfaceId`, false otherwise. */ function implementsERC165Interface(address account, bytes4 interfaceId) external view returns (bool); /** * @notice Checks whether a contract implements an ERC165 interface or not without using nor updating the cache. * @param account Address of the contract to check. * @param interfaceId ERC165 interface to check. * @return True if `account` implements `interfaceId`, false otherwise. */ function implementsERC165InterfaceNoCache(address account, bytes4 interfaceId) external view returns (bool); event InterfaceImplementerSet(address indexed account, bytes32 indexed interfaceHash, address indexed implementer); event ManagerChanged(address indexed account, address indexed newManager); } library Math { /** * @dev Returns the largest of two numbers. */ function max(uint256 a, uint256 b) internal pure returns (uint256) { return a >= b ? a : b; } /** * @dev Returns the smallest of two numbers. */ function min(uint256 a, uint256 b) internal pure returns (uint256) { return a < b ? a : b; } /** * @dev Returns the average of two numbers. The result is rounded towards * zero. */ function average(uint256 a, uint256 b) internal pure returns (uint256) { // (a + b) / 2 can overflow, so we distribute return (a / 2) + (b / 2) + ((a % 2 + b % 2) / 2); } } library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } library SafeERC20 { using SafeMath for uint256; using Address for address; function safeTransfer(IERC20 token, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value)); } /** * @dev Deprecated. This function has issues similar to the ones found in * {IERC20-approve}, and its usage is discouraged. * * Whenever possible, use {safeIncreaseAllowance} and * {safeDecreaseAllowance} instead. */ function safeApprove(IERC20 token, address spender, uint256 value) internal { // safeApprove should only be called when setting an initial allowance, // or when resetting it to zero. To increase and decrease it, use // 'safeIncreaseAllowance' and 'safeDecreaseAllowance' // solhint-disable-next-line max-line-length require((value == 0) || (token.allowance(address(this), spender) == 0), "SafeERC20: approve from non-zero to non-zero allowance" ); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value)); } function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).add(value); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero"); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). */ function _callOptionalReturn(IERC20 token, bytes memory data) private { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that // the target address contains contract code and also asserts for success in the low-level call. bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed"); if (returndata.length > 0) { // Return data is optional // solhint-disable-next-line max-line-length require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } } } interface IERC777Recipient { /** * @dev Called by an {IERC777} token contract whenever tokens are being * moved or created into a registered account (`to`). The type of operation * is conveyed by `from` being the zero address or not. * * This call occurs _after_ the token contract's state is updated, so * {IERC777-balanceOf}, etc., can be used to query the post-operation state. * * This function may revert to prevent the operation from being executed. */ function tokensReceived( address operator, address from, address to, uint256 amount, bytes calldata userData, bytes calldata operatorData ) external; } library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // This method relies in extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. uint256 size; // solhint-disable-next-line no-inline-assembly assembly { size := extcodesize(account) } return size > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain`call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return _functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); return _functionCallWithValue(target, data, value, errorMessage); } function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) { require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: weiValue }(data); if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } interface HermezVesting { function move(address recipient, uint256 amount) external; function changeAddress(address newAddress) external; } interface HEZ { function approve(address spender, uint256 amount) external returns (bool); function balanceOf(address account) external view returns (uint256); function transfer(address recipient, uint256 amount) external returns (bool); } contract BootstrapDistribution { using SafeMath for uint256; HEZ public constant TOKEN_ADDRESS = HEZ(0xEEF9f339514298C6A857EfCfC1A762aF84438dEE); HermezVesting public constant VESTING_0 = HermezVesting(0x8109dfB06D4d9e694a8349B855cBF493A0B22186); HermezVesting public constant VESTING_1 = HermezVesting(0xDd90cA911a5dbfB1624fF7Eb586901a9b4BFC53D); HermezVesting public constant VESTING_2 = HermezVesting(0xB213aeAeF76f82e42263fe896433A260EF018df2); HermezVesting public constant VESTING_3 = HermezVesting(0x3049399e1308db7d2b28488880C6cFE9Aa003275); address public constant MULTISIG_VESTING_2 = 0xC21BE548060cB6E07017bFc0b926A71b5E638e09; address public constant MULTISIG_VESTING_3 = 0x5Fa543E23a1B62e45d010f81AFC0602456BD1F1d; address public constant VESTING_0_ADDRESS_0 = 0x94E886bB17451A7B82E594db12570a5AdFC2D453; address public constant VESTING_0_ADDRESS_1 = 0x4FE10B3e306aC1F4b966Db07f031ae5780BC48fB; address public constant VESTING_0_ADDRESS_2 = 0x6629300128CCdda1e88641Ba2941a22Ce82F5df9; address public constant VESTING_0_ADDRESS_3 = 0xEb60e28Ce3aCa617d1E0293791c1903cF022b9Cd; address public constant VESTING_0_ADDRESS_4 = 0x9a415E0cE643abc4AD953B651b2D7e4db2FF3bEa; address public constant VESTING_0_ADDRESS_5 = 0x15b54c53093aF3e11d787db86e268a6C4F2F72A2; address public constant VESTING_0_ADDRESS_6 = 0x3279c71F132833190F6cd1D6a9975FFBf8d7C6dC; address public constant VESTING_0_ADDRESS_7 = 0x312e6f33155177774CDa1A3C4e9f077D93266063; address public constant VESTING_0_ADDRESS_8 = 0x47690A724Ed551fe2ff1A5eBa335B7c1B7a40990; address public constant VESTING_1_ADDRESS_0 = 0x80FbB6dd386FC98D2B387F37845A373c8441c069; address public constant VESTING_2_ADDRESS_0 = 0xBd48F607E26d94772FB21ED1d814F9F116dBD95C; address public constant VESTING_3_ADDRESS_0 = 0x520Cf70a2D0B3dfB7386A2Bc9F800321F62a5c3a; address public constant NO_VESTED_ADDRESS_0 = 0x4D4a7675CC0eb0a3B1d81CbDcd828c4BD0D74155; address public constant NO_VESTED_ADDRESS_1 = 0x9CdaeBd2bcEED9EB05a3B3cccd601A40CB0026be; address public constant NO_VESTED_ADDRESS_2 = 0x9315F815002d472A3E993ac9dc7461f2601A3c09; address public constant NO_VESTED_ADDRESS_3 = 0xF96A39d61F6972d8dC0CCd2A3c082eD922E096a7; address public constant NO_VESTED_ADDRESS_4 = 0xA93Bb239509D16827B7ee9DA7dA6Fc8478837247; address public constant NO_VESTED_ADDRESS_5 = 0x99Ae889E171B82BB04FD22E254024716932e5F2f; uint256 public constant VESTING_0_AMOUNT = 20_000_000 ether; uint256 public constant VESTING_1_AMOUNT = 10_000_000 ether; uint256 public constant VESTING_2_AMOUNT = 6_200_000 ether; uint256 public constant VESTING_3_AMOUNT = 17_500_000 ether; uint256 public constant VESTING_0_ADDRESS_0_AMOUNT = 12_000_000 ether; uint256 public constant VESTING_0_ADDRESS_1_AMOUNT = 1_850_000 ether; uint256 public constant VESTING_0_ADDRESS_2_AMOUNT = 1_675_000 ether; uint256 public constant VESTING_0_ADDRESS_3_AMOUNT = 1_300_000 ether; uint256 public constant VESTING_0_ADDRESS_4_AMOUNT = 1_000_000 ether; uint256 public constant VESTING_0_ADDRESS_5_AMOUNT = 750_000 ether; uint256 public constant VESTING_0_ADDRESS_6_AMOUNT = 625_000 ether; uint256 public constant VESTING_0_ADDRESS_7_AMOUNT = 525_000 ether; uint256 public constant VESTING_0_ADDRESS_8_AMOUNT = 275_000 ether; uint256 public constant VESTING_1_ADDRESS_0_AMOUNT = 10_000_000 ether; uint256 public constant VESTING_2_ADDRESS_0_AMOUNT = 500_000 ether; uint256 public constant VESTING_3_ADDRESS_0_AMOUNT = 300_000 ether; uint256 public constant NO_VESTED_ADDRESS_0_AMOUNT = 19_000_000 ether; uint256 public constant NO_VESTED_ADDRESS_1_AMOUNT = 9_000_000 ether; uint256 public constant NO_VESTED_ADDRESS_2_AMOUNT = 7_500_000 ether; uint256 public constant NO_VESTED_ADDRESS_3_AMOUNT = 5_000_000 ether; uint256 public constant NO_VESTED_ADDRESS_4_AMOUNT = 3_000_000 ether; uint256 public constant NO_VESTED_ADDRESS_5_AMOUNT = 2_800_000 ether; uint256 public constant INTERMEDIATE_BALANCE = 46_300_000 ether; function distribute() public { require( TOKEN_ADDRESS.balanceOf(address(this)) == (100_000_000 ether), "BootstrapDistribution::distribute NOT_ENOUGH_BALANCE" ); // Vested Tokens // Transfer HEZ tokens TOKEN_ADDRESS.transfer(address(VESTING_0),VESTING_0_AMOUNT); TOKEN_ADDRESS.transfer(address(VESTING_1),VESTING_1_AMOUNT); TOKEN_ADDRESS.transfer(address(VESTING_2),VESTING_2_AMOUNT); TOKEN_ADDRESS.transfer(address(VESTING_3),VESTING_3_AMOUNT); // Transfer vested tokens transferVestedTokens0(); transferVestedTokens1(); transferVestedTokens2(); transferVestedTokens3(); // Check intermediate balance require( TOKEN_ADDRESS.balanceOf(address(this)) == INTERMEDIATE_BALANCE, "BootstrapDistribution::distribute NOT_ENOUGH_NO_VESTED_BALANCE" ); // No Vested Tokens TOKEN_ADDRESS.transfer(NO_VESTED_ADDRESS_0, NO_VESTED_ADDRESS_0_AMOUNT); TOKEN_ADDRESS.transfer(NO_VESTED_ADDRESS_1, NO_VESTED_ADDRESS_1_AMOUNT); TOKEN_ADDRESS.transfer(NO_VESTED_ADDRESS_2, NO_VESTED_ADDRESS_2_AMOUNT); TOKEN_ADDRESS.transfer(NO_VESTED_ADDRESS_3, NO_VESTED_ADDRESS_3_AMOUNT); TOKEN_ADDRESS.transfer(NO_VESTED_ADDRESS_4, NO_VESTED_ADDRESS_4_AMOUNT); TOKEN_ADDRESS.transfer(NO_VESTED_ADDRESS_5, NO_VESTED_ADDRESS_5_AMOUNT); require( TOKEN_ADDRESS.balanceOf(address(this)) == 0, "BootstrapDistribution::distribute PENDING_BALANCE" ); } function transferVestedTokens0() internal { VESTING_0.move(VESTING_0_ADDRESS_0, VESTING_0_ADDRESS_0_AMOUNT); VESTING_0.move(VESTING_0_ADDRESS_1, VESTING_0_ADDRESS_1_AMOUNT); VESTING_0.move(VESTING_0_ADDRESS_2, VESTING_0_ADDRESS_2_AMOUNT); VESTING_0.move(VESTING_0_ADDRESS_3, VESTING_0_ADDRESS_3_AMOUNT); VESTING_0.move(VESTING_0_ADDRESS_4, VESTING_0_ADDRESS_4_AMOUNT); VESTING_0.move(VESTING_0_ADDRESS_5, VESTING_0_ADDRESS_5_AMOUNT); VESTING_0.move(VESTING_0_ADDRESS_6, VESTING_0_ADDRESS_6_AMOUNT); VESTING_0.move(VESTING_0_ADDRESS_7, VESTING_0_ADDRESS_7_AMOUNT); VESTING_0.move(VESTING_0_ADDRESS_8, VESTING_0_ADDRESS_8_AMOUNT); VESTING_0.changeAddress(address(0)); } function transferVestedTokens1() internal { VESTING_1.move(VESTING_1_ADDRESS_0, VESTING_1_ADDRESS_0_AMOUNT); VESTING_1.changeAddress(address(0)); } function transferVestedTokens2() internal { VESTING_2.move(VESTING_2_ADDRESS_0, VESTING_2_ADDRESS_0_AMOUNT); VESTING_2.changeAddress(MULTISIG_VESTING_2); } function transferVestedTokens3() internal { VESTING_3.move(VESTING_3_ADDRESS_0, VESTING_3_ADDRESS_0_AMOUNT); VESTING_3.changeAddress(MULTISIG_VESTING_3); } } contract HermezVesting { using SafeMath for uint256; address public distributor; mapping(address => uint256) public vestedTokens; mapping(address => uint256) public withdrawed; uint256 public totalVestedTokens; uint256 public startTime; uint256 public cliffTime; uint256 public endTime; uint256 public initialPercentage; address public constant HEZ = address( 0xEEF9f339514298C6A857EfCfC1A762aF84438dEE ); event Withdraw(address indexed recipient, uint256 amount); event Move(address indexed from, address indexed to, uint256 value); event ChangeAddress(address indexed oldAddress, address indexed newAddress); constructor( address _distributor, uint256 _totalVestedTokens, uint256 _startTime, uint256 _startToCliff, uint256 _startToEnd, uint256 _initialPercentage ) public { require( _startToEnd >= _startToCliff, "HermezVesting::constructor: START_GREATER_THAN_CLIFF" ); require( _initialPercentage <= 100, "HermezVesting::constructor: INITIALPERCENTAGE_GREATER_THAN_100" ); distributor = _distributor; totalVestedTokens = _totalVestedTokens; vestedTokens[_distributor] = _totalVestedTokens; startTime = _startTime; cliffTime = _startTime + _startToCliff; endTime = _startTime + _startToEnd; initialPercentage = _initialPercentage; } function totalTokensUnlockedAt(uint256 timestamp) public view returns (uint256) { if (timestamp < startTime) return 0; if (timestamp > endTime) return totalVestedTokens; uint256 initialAmount = totalVestedTokens.mul(initialPercentage).div( 100 ); if (timestamp < cliffTime) return initialAmount; uint256 deltaT = timestamp.sub(startTime); uint256 deltaTTotal = endTime.sub(startTime); uint256 deltaAmountTotal = totalVestedTokens.sub(initialAmount); return initialAmount.add(deltaT.mul(deltaAmountTotal).div(deltaTTotal)); } function withdrawableTokens(address recipient) public view returns (uint256) { return withdrawableTokensAt(recipient, block.timestamp); } function withdrawableTokensAt(address recipient, uint256 timestamp) public view returns (uint256) { uint256 unlockedAmount = totalTokensUnlockedAt(timestamp) .mul(vestedTokens[recipient]) .div(totalVestedTokens); return unlockedAmount.sub(withdrawed[recipient]); } function withdraw() external { require( msg.sender != distributor, "HermezVesting::withdraw: DISTRIBUTOR_CANNOT_WITHDRAW" ); uint256 remainingToWithdraw = withdrawableTokensAt( msg.sender, block.timestamp ); withdrawed[msg.sender] = withdrawed[msg.sender].add( remainingToWithdraw ); require( IERC20(HEZ).transfer(msg.sender, remainingToWithdraw), "HermezVesting::withdraw: TOKEN_TRANSFER_ERROR" ); emit Withdraw(msg.sender, remainingToWithdraw); } function move(address recipient, uint256 amount) external { require( msg.sender == distributor, "HermezVesting::changeAddress: ONLY_DISTRIBUTOR" ); vestedTokens[msg.sender] = vestedTokens[msg.sender].sub(amount); vestedTokens[recipient] = vestedTokens[recipient].add(amount); emit Move(msg.sender, recipient, amount); } function changeAddress(address newAddress) external { require( vestedTokens[newAddress] == 0, "HermezVesting::changeAddress: ADDRESS_HAS_BALANCE" ); require( withdrawed[newAddress] == 0, "HermezVesting::changeAddress: ADDRESS_ALREADY_WITHDRAWED" ); vestedTokens[newAddress] = vestedTokens[msg.sender]; vestedTokens[msg.sender] = 0; withdrawed[newAddress] = withdrawed[msg.sender]; withdrawed[msg.sender] = 0; if (msg.sender == distributor) { distributor = newAddress; } emit ChangeAddress(msg.sender, newAddress); } } contract LPTokenWrapper { using SafeMath for uint256; using SafeERC20 for IERC20; // Uniswap v2 HEZ/ETH pair token IERC20 public UNI = IERC20(0x4a9EFa254085F36122d4b8BD2111544F8dC77052); uint256 private _totalSupply; mapping(address => uint256) private _balances; function totalSupply() public view returns (uint256) { return _totalSupply; } function balanceOf(address account) public view returns (uint256) { return _balances[account]; } function stake(uint256 amount) public virtual { _totalSupply = _totalSupply.add(amount); _balances[msg.sender] = _balances[msg.sender].add(amount); UNI.safeTransferFrom(msg.sender, address(this), amount); } function withdraw(uint256 amount) public virtual { _totalSupply = _totalSupply.sub(amount); _balances[msg.sender] = _balances[msg.sender].sub(amount); UNI.safeTransfer(msg.sender, amount); } } contract Unipool is LPTokenWrapper, IERC777Recipient { uint256 public constant DURATION = 30 days; // Hermez Network Token IERC20 public HEZ = IERC20(0xcAEf929782361ccE9618c014D2867E423fE84ae7); IERC1820Registry private constant _ERC1820_REGISTRY = IERC1820Registry( 0x1820a4B7618BdE71Dce8cdc73aAB6C95905faD24 ); bytes32 private constant _ERC777_RECIPIENT_INTERFACE_HASH = keccak256( "ERC777TokensRecipient" ); uint256 public periodFinish; uint256 public rewardRate; uint256 public lastUpdateTime; uint256 public rewardPerTokenStored; mapping(address => uint256) public userRewardPerTokenPaid; mapping(address => uint256) public rewards; event RewardAdded(uint256 reward); event Staked(address indexed user, uint256 amount); event Withdrawn(address indexed user, uint256 amount); event RewardPaid(address indexed user, uint256 reward); modifier updateReward(address account) { rewardPerTokenStored = rewardPerToken(); lastUpdateTime = lastTimeRewardApplicable(); if (account != address(0)) { rewards[account] = earned(account); userRewardPerTokenPaid[account] = rewardPerTokenStored; } _; } constructor() public { _ERC1820_REGISTRY.setInterfaceImplementer( address(this), _ERC777_RECIPIENT_INTERFACE_HASH, address(this) ); } function lastTimeRewardApplicable() public view returns (uint256) { return Math.min(block.timestamp, periodFinish); } function rewardPerToken() public view returns (uint256) { if (totalSupply() == 0) { return rewardPerTokenStored; } require( lastTimeRewardApplicable() >= lastUpdateTime, "lastTimeRewardApplicable < lastUpdateTime" ); return rewardPerTokenStored.add( lastTimeRewardApplicable() .sub(lastUpdateTime) .mul(rewardRate) .mul(1e18) .div(totalSupply()) ); } function earned(address account) public view returns (uint256) { require( rewardPerToken() >= userRewardPerTokenPaid[account], "rewardPerToken() < userRewardPerTokenPaid[account] " ); return balanceOf(account) .mul(rewardPerToken().sub(userRewardPerTokenPaid[account])) .div(1e18) .add(rewards[account]); } // stake visibility is public as overriding LPTokenWrapper's stake() function function stake(uint256 amount) public override updateReward(msg.sender) { require(amount > 0, "Cannot stake 0"); super.stake(amount); emit Staked(msg.sender, amount); } function withdraw(uint256 amount) public override updateReward(msg.sender) { require(amount > 0, "Cannot withdraw 0"); super.withdraw(amount); emit Withdrawn(msg.sender, amount); } function exit() external { withdraw(balanceOf(msg.sender)); getReward(); } function getReward() public updateReward(msg.sender) { uint256 reward = earned(msg.sender); if (reward > 0) { rewards[msg.sender] = 0; HEZ.safeTransfer(msg.sender, reward); emit RewardPaid(msg.sender, reward); } } function tokensReceived( // solhint-disable no-unused-vars address _operator, address _from, address _to, uint256 _amount, bytes calldata _userData, bytes calldata _operatorData ) external override updateReward(address(0)) { require(_amount > 0, "Cannot approve 0"); require(msg.sender == address(HEZ), "Wrong token"); require( _from == 0xF35960302a07022aBa880DFFaEC2Fdd64d5BF1c1, "Not allowed" ); if (block.timestamp >= periodFinish) { rewardRate = _amount.div(DURATION); } else { uint256 remaining = periodFinish.sub(block.timestamp); uint256 leftover = remaining.mul(rewardRate); rewardRate = _amount.add(leftover).div(DURATION); } lastUpdateTime = block.timestamp; periodFinish = block.timestamp.add(DURATION); emit RewardAdded(_amount); } } interface IERC20 { function totalSupply() external view returns (uint256); function balanceOf(address account) external view returns (uint256); function allowance(address owner, address spender) external view returns (uint256); function approve(address spender, uint256 amount) external returns (bool); function transfer(address recipient, uint256 amount) external returns (bool); function transferFrom( address sender, address recipient, uint256 amount ) external returns (bool); } library SafeMath { string private constant ERROR_ADD_OVERFLOW = "MATH:ADD_OVERFLOW"; string private constant ERROR_SUB_UNDERFLOW = "MATH:SUB_UNDERFLOW"; function add(uint256 x, uint256 y) internal pure returns (uint256 z) { require((z = x + y) >= x, ERROR_ADD_OVERFLOW); } function sub(uint256 x, uint256 y) internal pure returns (uint256 z) { require((z = x - y) <= x, ERROR_SUB_UNDERFLOW); } } contract HEZ is IERC20 { using SafeMath for uint256; uint8 public constant decimals = 18; string public constant symbol = "HEZ"; string public constant name = "Hermez Network Token"; uint256 public constant initialBalance = 100_000_000 * (1e18); // bytes32 public constant PERMIT_TYPEHASH = // keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)"); bytes32 public constant PERMIT_TYPEHASH = 0x6e71edae12b1b97f4d1f60370fef10105fa2faae0126114a169c64845d6126c9; // bytes32 public constant TRANSFER_WITH_AUTHORIZATION_TYPEHASH = // keccak256("TransferWithAuthorization(address from,address to,uint256 value,uint256 validAfter,uint256 validBefore,bytes32 nonce)"); bytes32 public constant TRANSFER_WITH_AUTHORIZATION_TYPEHASH = 0x7c7c6cdb67a18743f49ec6fa9b35f50d52ed05cbed4cc592e13b44501c1a2267; // bytes32 public constant EIP712DOMAIN_HASH = // keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)") bytes32 public constant EIP712DOMAIN_HASH = 0x8b73c3c69bb8fe3d512ecc4cf759cc79239f7b179b0ffacaa9a75d522b39400f; // bytes32 public constant NAME_HASH = // keccak256("Hermez Network Token") bytes32 public constant NAME_HASH = 0x64c0a41a0260272b78f2a5bd50d5ff7c1779bc3bba16dcff4550c7c642b0e4b4; // bytes32 public constant VERSION_HASH = // keccak256("1") bytes32 public constant VERSION_HASH = 0xc89efdaa54c0f20c7adf612882df0950f5a951637e0307cdcb4c672f298b8bc6; uint256 public override totalSupply; mapping(address => uint256) public override balanceOf; mapping(address => mapping(address => uint256)) public override allowance; mapping(address => uint256) public nonces; mapping(address => mapping(bytes32 => bool)) public authorizationState; event Approval(address indexed owner, address indexed spender, uint256 value); event Transfer(address indexed from, address indexed to, uint256 value); event AuthorizationUsed(address indexed authorizer, bytes32 indexed nonce); constructor(address initialHolder) public { _mint(initialHolder, initialBalance); } function _validateSignedData( address signer, bytes32 encodeData, uint8 v, bytes32 r, bytes32 s ) internal view { bytes32 domainSeparator = keccak256( abi.encode( EIP712DOMAIN_HASH, NAME_HASH, VERSION_HASH, getChainId(), address(this) ) ); bytes32 digest = keccak256( abi.encodePacked("\x19\x01", domainSeparator, encodeData) ); address recoveredAddress = ecrecover(digest, v, r, s); // Explicitly disallow authorizations for address(0) as ecrecover returns address(0) on malformed messages require( recoveredAddress != address(0) && recoveredAddress == signer, "HEZ::_validateSignedData: INVALID_SIGNATURE" ); } function getChainId() public pure returns (uint256 chainId){ assembly { chainId := chainid() } } function _mint(address to, uint256 value) internal { totalSupply = totalSupply.add(value); balanceOf[to] = balanceOf[to].add(value); emit Transfer(address(0), to, value); } function _burn(address from, uint value) internal { // Balance is implicitly checked with SafeMath's underflow protection balanceOf[from] = balanceOf[from].sub(value); totalSupply = totalSupply.sub(value); emit Transfer(from, address(0), value); } function _approve( address owner, address spender, uint256 value ) private { allowance[owner][spender] = value; emit Approval(owner, spender, value); } function _transfer( address from, address to, uint256 value ) private { require( to != address(this) && to != address(0), "HEZ::_transfer: NOT_VALID_TRANSFER" ); // Balance is implicitly checked with SafeMath's underflow protection balanceOf[from] = balanceOf[from].sub(value); balanceOf[to] = balanceOf[to].add(value); emit Transfer(from, to, value); } function burn(uint256 value) external returns (bool) { _burn(msg.sender, value); return true; } function approve(address spender, uint256 value) external override returns (bool) { _approve(msg.sender, spender, value); return true; } function transfer(address to, uint256 value) external override returns (bool) { _transfer(msg.sender, to, value); return true; } function transferFrom( address from, address to, uint256 value ) external override returns (bool) { uint256 fromAllowance = allowance[from][msg.sender]; if (fromAllowance != uint256(-1)) { // Allowance is implicitly checked with SafeMath's underflow protection allowance[from][msg.sender] = fromAllowance.sub(value); } _transfer(from, to, value); return true; } function permit( address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) external { require(deadline >= block.timestamp, "HEZ::permit: AUTH_EXPIRED"); bytes32 encodeData = keccak256( abi.encode( PERMIT_TYPEHASH, owner, spender, value, nonces[owner]++, deadline ) ); _validateSignedData(owner, encodeData, v, r, s); _approve(owner, spender, value); } function transferWithAuthorization( address from, address to, uint256 value, uint256 validAfter, uint256 validBefore, bytes32 nonce, uint8 v, bytes32 r, bytes32 s ) external { require(block.timestamp > validAfter, "HEZ::transferWithAuthorization: AUTH_NOT_YET_VALID"); require(block.timestamp < validBefore, "HEZ::transferWithAuthorization: AUTH_EXPIRED"); require(!authorizationState[from][nonce], "HEZ::transferWithAuthorization: AUTH_ALREADY_USED"); bytes32 encodeData = keccak256( abi.encode( TRANSFER_WITH_AUTHORIZATION_TYPEHASH, from, to, value, validAfter, validBefore, nonce ) ); _validateSignedData(from, encodeData, v, r, s); authorizationState[from][nonce] = true; _transfer(from, to, value); emit AuthorizationUsed(from, nonce); } } contract HEZMock is HEZ { constructor(address initialHolder) public HEZ(initialHolder) {} function mint(address to, uint256 value) external { super._mint(to, value); } }

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{"success": true, "error": null, "results": {"detectors": [{"check": "reentrancy-eth", "impact": "High", "confidence": "Medium"}, {"check": "unchecked-transfer", "impact": "High", "confidence": "Medium"}, {"check": "incorrect-equality", "impact": "Medium", "confidence": "High"}, {"check": "name-reused", "impact": "High", "confidence": "High"}]}}

0x8162110553ff13c7be93f82535866a519be4fe00

pragma solidity 0.7.0; interface IOwnershipTransferrable { function transferOwnership(address owner) external; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); } abstract contract Ownable is IOwnershipTransferrable { address private _owner; constructor(address owner) { _owner = owner; emit OwnershipTransferred(address(0), _owner); } function owner() public view returns (address) { return _owner; } modifier onlyOwner() { require(_owner == msg.sender, "Ownable: caller is not the owner"); _; } function transferOwnership(address newOwner) override external onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } } library SafeMath { function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a); return c; } function sub(uint256 a, uint256 b) internal pure returns (uint256) { require(b <= a); uint256 c = a - b; return c; } function mul(uint256 a, uint256 b) internal pure returns (uint256) { if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b); return c; } function div(uint256 a, uint256 b) internal pure returns (uint256) { require(b > 0); uint256 c = a / b; return c; } function mod(uint256 a, uint256 b) internal pure returns (uint256) { require(b != 0); return a % b; } } contract Seed is Ownable { using SafeMath for uint256; uint256 constant UINT256_MAX = ~uint256(0); string private _name; string private _symbol; uint8 private _decimals; uint256 private _totalSupply; mapping(address => uint256) private _balances; mapping(address => mapping(address => uint256)) private _allowances; event Transfer(address indexed from, address indexed to, uint256 value); event Approval(address indexed owner, address indexed spender, uint256 value); constructor() Ownable(msg.sender) { _totalSupply = 1000000 * 1e18; _name = "Seed"; _symbol = "SEED"; _decimals = 18; _balances[msg.sender] = _totalSupply; emit Transfer(address(0), msg.sender, _totalSupply); } function name() external view returns (string memory) { return _name; } function symbol() external view returns (string memory) { return _symbol; } function decimals() external view returns (uint8) { return _decimals; } function totalSupply() external view returns (uint256) { return _totalSupply; } function balanceOf(address account) external view returns (uint256) { return _balances[account]; } function allowance(address owner, address spender) external view returns (uint256) { return _allowances[owner][spender]; } function transfer(address recipient, uint256 amount) external returns (bool) { _transfer(msg.sender, recipient, amount); return true; } function approve(address spender, uint256 amount) external returns (bool) { _approve(msg.sender, spender, amount); return true; } function transferFrom(address sender, address recipient, uint256 amount) external returns (bool) { _transfer(sender, recipient, amount); if (_allowances[msg.sender][sender] != UINT256_MAX) { _approve(sender, msg.sender, _allowances[sender][msg.sender].sub(amount)); } return true; } function _transfer(address sender, address recipient, uint256 amount) internal { require(sender != address(0)); require(recipient != address(0)); _balances[sender] = _balances[sender].sub(amount); _balances[recipient] = _balances[recipient].add(amount); emit Transfer(sender, recipient, amount); } function mint(address account, uint256 amount) external onlyOwner { _totalSupply = _totalSupply.add(amount); _balances[account] = _balances[account].add(amount); emit Transfer(address(0), account, amount); } function increaseAllowance(address spender, uint256 addedValue) external returns (bool) { _approve(msg.sender, spender, _allowances[msg.sender][spender].add(addedValue)); return true; } function decreaseAllowance(address spender, uint256 subtractedValue) external returns (bool) { _approve(msg.sender, spender, _allowances[msg.sender][spender].sub(subtractedValue)); return true; } function _approve(address owner, address spender, uint256 amount) internal { require(owner != address(0)); require(spender != address(0)); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } function burn(uint256 amount) external returns (bool) { _balances[msg.sender] = _balances[msg.sender].sub(amount); _totalSupply = _totalSupply.sub(amount); emit Transfer(msg.sender, address(0), amount); return true; } } abstract contract ReentrancyGuard { bool private _entered; modifier noReentrancy() { require(!_entered); _entered = true; _; _entered = false; } } interface ISeedBorrower { function loaned(uint256 amount, uint256 owed) external; } contract SeedLoan is ReentrancyGuard, Ownable { uint256 internal _feeDivisor = 100; using SafeMath for uint256; Seed private _SEED; event Loaned(uint256 amount, uint256 profit); constructor(address SEED, address seedStake) Ownable(seedStake) { _SEED = Seed(SEED); } // loan out SEED from the staked funds function loan(uint256 amount) external noReentrancy { // set a profit of 1% uint256 profit = amount.div(_feeDivisor); uint256 owed = amount.add(profit); // transfer the funds require(_SEED.transferFrom(owner(), msg.sender, amount)); // call the loaned function ISeedBorrower(msg.sender).loaned(amount, owed); // transfer back to the staking pool require(_SEED.transferFrom(msg.sender, owner(), amount)); // take the profit require(_SEED.transferFrom(msg.sender, address(this), profit)); // burn it, distributing its value to the ecosystem require(_SEED.burn(profit)); emit Loaned(amount, profit); } }

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0x816c82409ec8e0c008fc79e902a8e790bb70840c

pragma solidity 0.6.12; library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } contract SwapContract { using SafeMath for uint256; address public unc; address public uncx; constructor (address _unc, address _uncx) public { unc = _unc; uncx = _uncx; } function swapAmount (uint256 _amount) public pure returns (uint256) { uint256 credit = _amount.div(4000); return credit; } function doSwap (uint256 _amount) public { TransferHelper.safeTransferFrom(unc, address(msg.sender), address(this), _amount); uint256 credit = _amount.div(4000); require(credit > 0, 'Amount 0'); TransferHelper.safeTransfer(uncx, address(msg.sender), credit); } } library TransferHelper { function safeApprove(address token, address to, uint value) internal { (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x095ea7b3, to, value)); require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: APPROVE_FAILED'); } function safeTransfer(address token, address to, uint value) internal { (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0xa9059cbb, to, value)); require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: TRANSFER_FAILED'); } function safeTransferFrom(address token, address from, address to, uint value) internal { (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x23b872dd, from, to, value)); require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: TRANSFER_FROM_FAILED'); } }

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0x82b9c89af106716d48270618848c83a1dc5b2365

pragma solidity 0.6.6; interface IERC20 { function totalSupply() external view returns (uint256); function balanceOf(address account) external view returns (uint256); function transfer(address recipient, uint256 amount) external returns (bool); function allowance(address owner, address spender) external view returns (uint256); function approve(address spender, uint256 amount) external returns (bool); function transferFrom( address sender, address recipient, uint256 amount ) external returns (bool); event Transfer(address indexed from, address indexed to, uint256 value); event Approval( address indexed owner, address indexed spender, uint256 value ); } library SafeMath { function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } function sub( uint256 a, uint256 b, string memory errorMessage ) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } function mul(uint256 a, uint256 b) internal pure returns (uint256) { if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } function div( uint256 a, uint256 b, string memory errorMessage ) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; return c; } function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } function mod( uint256 a, uint256 b, string memory errorMessage ) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } contract ERC20 is IERC20 { using SafeMath for uint256; mapping(address => uint256) private _balances; mapping(address => mapping(address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; uint8 private _decimals; constructor(string memory name, string memory symbol) public { _name = name; _symbol = symbol; _decimals = 18; _mint(msg.sender, 80000000000000000000000); //total supply 80k } function name() public view returns (string memory) { return _name; } function symbol() public view returns (string memory) { return _symbol; } function decimals() public view returns (uint8) { return _decimals; } function totalSupply() public override view returns (uint256) { return _totalSupply; } function balanceOf(address account) public override view returns (uint256) { return _balances[account]; } function transfer(address recipient, uint256 amount) public virtual override returns (bool) { _transfer(msg.sender, recipient, amount); return true; } function allowance(address owner, address spender) public virtual override view returns (uint256) { return _allowances[owner][spender]; } function approve(address spender, uint256 amount) public virtual override returns (bool) { _approve(msg.sender, spender, amount); return true; } function transferFrom( address sender, address recipient, uint256 amount ) public virtual override returns (bool) { _transfer(sender, recipient, amount); _approve( sender, msg.sender, _allowances[sender][msg.sender].sub( amount, "ERC20: transfer amount exceeds allowance" ) ); return true; } function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { _approve( msg.sender, spender, _allowances[msg.sender][spender].add(addedValue) ); return true; } function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { _approve( msg.sender, spender, _allowances[msg.sender][spender].sub( subtractedValue, "ERC20: decreased allowance below zero" ) ); return true; } function _transfer( address sender, address recipient, uint256 amount ) internal virtual { require(sender != address(0), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(sender, recipient, amount); _balances[sender] = _balances[sender].sub( amount, "ERC20: transfer amount exceeds balance" ); _balances[recipient] = _balances[recipient].add(amount); emit Transfer(sender, recipient, amount); } function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply = _totalSupply.add(amount); _balances[account] = _balances[account].add(amount); emit Transfer(address(0), account, amount); } function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); _balances[account] = _balances[account].sub( amount, "ERC20: burn amount exceeds balance" ); _totalSupply = _totalSupply.sub(amount); emit Transfer(account, address(0), amount); } function _approve( address owner, address spender, uint256 amount ) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } function _setupDecimals(uint8 decimals_) internal { _decimals = decimals_; } function _beforeTokenTransfer( address from, address to, uint256 amount ) internal virtual {} }

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0x833dd24c10d1d2376eab843c695685f6df9ee6aa

pragma solidity 0.4.26; interface IERC20 { function totalSupply() external view returns (uint256); function balanceOf(address who) external view returns (uint256); function allowance(address owner, address spender) external view returns (uint256); function transfer(address to, uint256 value) external returns (bool); function approve(address spender, uint256 value) external returns (bool); function transferFrom(address from, address to, uint256 value) external returns (bool); event Transfer( address indexed from, address indexed to, uint256 value ); event Approval( address indexed owner, address indexed spender, uint256 value ); } contract Ownable { address private _owner; event OwnershipTransferred( address indexed previousOwner, address indexed newOwner ); /** * @dev The Ownable constructor sets the original `owner` of the contract to the sender * account. */ constructor() internal { _owner = msg.sender; emit OwnershipTransferred(address(0), _owner); } /** * @return the address of the owner. */ function owner() public view returns(address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(isOwner()); _; } /** * @return true if `msg.sender` is the owner of the contract. */ function isOwner() public view returns(bool) { return msg.sender == _owner; } /** * @dev Allows the current owner to relinquish control of the contract. * @notice Renouncing to ownership will leave the contract without an owner. * It will not be possible to call the functions with the `onlyOwner` * modifier anymore. */ function renounceOwnership() public onlyOwner { emit OwnershipTransferred(_owner, address(0)); _owner = address(0); } /** * @dev Allows the current owner to transfer control of the contract to a newOwner. * @param newOwner The address to transfer ownership to. */ function transferOwnership(address newOwner) public onlyOwner { _transferOwnership(newOwner); } /** * @dev Transfers control of the contract to a newOwner. * @param newOwner The address to transfer ownership to. */ function _transferOwnership(address newOwner) internal { require(newOwner != address(0)); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } } library SafeMath { /** * @dev Multiplies two numbers, reverts on overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b); return c; } /** * @dev Integer division of two numbers truncating the quotient, reverts on division by zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { require(b > 0); // Solidity only automatically asserts when dividing by 0 uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Subtracts two numbers, reverts on overflow (i.e. if subtrahend is greater than minuend). */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { require(b <= a); uint256 c = a - b; return c; } /** * @dev Adds two numbers, reverts on overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a); return c; } /** * @dev Divides two numbers and returns the remainder (unsigned integer modulo), * reverts when dividing by zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { require(b != 0); return a % b; } } contract Stoppable is Ownable{ bool public stopped = false; modifier enabled { require (!stopped); _; } function stop() external onlyOwner { stopped = true; } function start() external onlyOwner { stopped = false; } } contract ERC20 is IERC20 { using SafeMath for uint256; mapping (address => uint256) private _balances; mapping (address => mapping (address => uint256)) private _allowed; uint256 private _totalSupply; /** * @dev Total number of tokens in existence */ function totalSupply() public view returns (uint256) { return _totalSupply; } /** * @dev Gets the balance of the specified address. * @param owner The address to query the balance of. * @return An uint256 representing the amount owned by the passed address. */ function balanceOf(address owner) public view returns (uint256) { return _balances[owner]; } /** * @dev Function to check the amount of tokens that an owner allowed to a spender. * @param owner address The address which owns the funds. * @param spender address The address which will spend the funds. * @return A uint256 specifying the amount of tokens still available for the spender. */ function allowance( address owner, address spender ) public view returns (uint256) { return _allowed[owner][spender]; } /** * @dev Transfer token for a specified address * @param to The address to transfer to. * @param value The amount to be transferred. */ function transfer(address to, uint256 value) public returns (bool) { _transfer(msg.sender, to, value); return true; } /** * @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender. * Beware that changing an allowance with this method brings the risk that someone may use both the old * and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this * race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * @param spender The address which will spend the funds. * @param value The amount of tokens to be spent. */ function approve(address spender, uint256 value) public returns (bool) { require(spender != address(0)); _allowed[msg.sender][spender] = value; emit Approval(msg.sender, spender, value); return true; } /** * @dev Transfer tokens from one address to another * @param from address The address which you want to send tokens from * @param to address The address which you want to transfer to * @param value uint256 the amount of tokens to be transferred */ function transferFrom( address from, address to, uint256 value ) public returns (bool) { require(value <= _allowed[from][msg.sender]); _allowed[from][msg.sender] = _allowed[from][msg.sender].sub(value); _transfer(from, to, value); return true; } /** * @dev Increase the amount of tokens that an owner allowed to a spender. * approve should be called when allowed_[_spender] == 0. To increment * allowed value is better to use this function to avoid 2 calls (and wait until * the first transaction is mined) * From MonolithDAO Token.sol * @param spender The address which will spend the funds. * @param addedValue The amount of tokens to increase the allowance by. */ function increaseAllowance( address spender, uint256 addedValue ) public returns (bool) { require(spender != address(0)); _allowed[msg.sender][spender] = ( _allowed[msg.sender][spender].add(addedValue)); emit Approval(msg.sender, spender, _allowed[msg.sender][spender]); return true; } /** * @dev Decrease the amount of tokens that an owner allowed to a spender. * approve should be called when allowed_[_spender] == 0. To decrement * allowed value is better to use this function to avoid 2 calls (and wait until * the first transaction is mined) * From MonolithDAO Token.sol * @param spender The address which will spend the funds. * @param subtractedValue The amount of tokens to decrease the allowance by. */ function decreaseAllowance( address spender, uint256 subtractedValue ) public returns (bool) { require(spender != address(0)); _allowed[msg.sender][spender] = ( _allowed[msg.sender][spender].sub(subtractedValue)); emit Approval(msg.sender, spender, _allowed[msg.sender][spender]); return true; } /** * @dev Transfer token for a specified addresses * @param from The address to transfer from. * @param to The address to transfer to. * @param value The amount to be transferred. */ function _transfer(address from, address to, uint256 value) internal { require(value <= _balances[from]); require(to != address(0)); _balances[from] = _balances[from].sub(value); _balances[to] = _balances[to].add(value); emit Transfer(from, to, value); } /** * @dev Internal function that mints an amount of the token and assigns it to * an account. This encapsulates the modification of balances such that the * proper events are emitted. * @param account The account that will receive the created tokens. * @param value The amount that will be created. */ function _mint(address account, uint256 value) internal { require(account != 0); _totalSupply = _totalSupply.add(value); _balances[account] = _balances[account].add(value); emit Transfer(address(0), account, value); } /** * @dev Internal function that burns an amount of the token of a given * account. * @param account The account whose tokens will be burnt. * @param value The amount that will be burnt. */ function _burn(address account, uint256 value) internal { require(account != 0); require(value <= _balances[account]); _totalSupply = _totalSupply.sub(value); _balances[account] = _balances[account].sub(value); emit Transfer(account, address(0), value); } /** * @dev Internal function that burns an amount of the token of a given * account, deducting from the sender's allowance for said account. Uses the * internal burn function. * @param account The account whose tokens will be burnt. * @param value The amount that will be burnt. */ function _burnFrom(address account, uint256 value) internal { require(value <= _allowed[account][msg.sender]); // Should https://github.com/OpenZeppelin/zeppelin-solidity/issues/707 be accepted, // this function needs to emit an event with the updated approval. _allowed[account][msg.sender] = _allowed[account][msg.sender].sub( value); _burn(account, value); } } contract ERC20Burnable is ERC20 { /** * @dev Burns a specific amount of tokens. * @param value The amount of token to be burned. */ function burn(uint256 value) public { _burn(msg.sender, value); } /** * @dev Burns a specific amount of tokens from the target address and decrements allowance * @param from address The address which you want to send tokens from * @param value uint256 The amount of token to be burned */ /* --Do not use function burnFrom(address from, uint256 value) public { _burnFrom(from, value); //Only the owner's address can be burned. @ejkang } */ } contract ERC20Detailed is IERC20 { string private _name; string private _symbol; uint8 private _decimals; constructor(string name, string symbol, uint8 decimals) public { _name = name; _symbol = symbol; _decimals = decimals; } /** * @return the name of the token. */ function name() public view returns(string) { return _name; } /** * @return the symbol of the token. */ function symbol() public view returns(string) { return _symbol; } /** * @return the number of decimals of the token. */ function decimals() public view returns(uint8) { return _decimals; } } contract AXTToken is ERC20Detailed, /*ERC20,*/ ERC20Burnable, Stoppable { constructor ( string memory name, string memory symbol, uint256 totalSupply, uint8 decimals ) ERC20Detailed(name, symbol, decimals) public { _mint(owner(), totalSupply * 10**uint(decimals)); } // Don't accept ETH function () payable external { revert(); } /// increase amount (run only owner) /// @param account the owner account /// @param amount Amount to increas /// @return Boolean /// Do not use this function // function mint(address account, uint256 amount) public onlyOwner returns (bool) { // _mint(account, amount); // return true; // } //------------------------ // Lock account transfer mapping (address => uint256) private _lockTimes; mapping (address => uint256) private _lockAmounts; event LockChanged(address indexed account, uint256 releaseTime, uint256 amount); /// Lock user amount. (run only owner) /// @param account account to lock /// @param releaseTime Time to release from lock state. /// @param amount amount to lock. /// @return Boolean function setLock(address account, uint256 releaseTime, uint256 amount) onlyOwner public { //require(now < releaseTime, "ERC20 : Current time is greater than release time"); require(block.timestamp < releaseTime, "ERC20 : Current time is greater than release time"); require(amount != 0, "ERC20: Amount error"); _lockTimes[account] = releaseTime; _lockAmounts[account] = amount; emit LockChanged( account, releaseTime, amount ); } /// Get Lock information (run anyone) /// @param account user acount /// @return lokced time and locked amount. function getLock(address account) public view returns (uint256 lockTime, uint256 lockAmount) { return (_lockTimes[account], _lockAmounts[account]); } /// Check lock state (run anyone) /// @param account user acount /// @param amount amount to check. /// @return Boolean : Don't use balance (true) function _isLocked(address account, uint256 amount) internal view returns (bool) { //return _lockTimes[account] != 0 && return _lockAmounts[account] != 0 && _lockTimes[account] > block.timestamp && ( balanceOf(account) <= _lockAmounts[account] || balanceOf(account).sub(_lockAmounts[account]) < amount ); } /// Transfer token (run anyone) /// @param recipient Token trasfer destination acount. /// @param amount Token transfer amount. /// @return Boolean function transfer(address recipient, uint256 amount) enabled public returns (bool) { require( !_isLocked( msg.sender, amount ) , "ERC20: Locked balance"); return super.transfer(recipient, amount); } /// Transfer token (run anyone) /// @param sender Token trasfer source acount. /// @param recipient Token transfer destination acount. /// @param amount Token transfer amount. /// @return Boolean function transferFrom(address sender, address recipient, uint256 amount) enabled public returns (bool) { require( !_isLocked( sender, amount ) , "ERC20: Locked balance"); return super.transferFrom(sender, recipient, amount); } /// Decrease token balance (run only owner) /// @param value Amount to decrease. function burn(uint256 value) onlyOwner public { require( !_isLocked( msg.sender, value ) , "ERC20: Locked balance"); super.burn(value); } //Not use function /* function burnFrom(address from, uint256 value) onlyOwner public { require( !_isLocked( from, value ) , "ERC20: Locked balance"); super.burnFrom(from, value); } */ }

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{"success": true, "error": null, "results": {"detectors": [{"check": "locked-ether", "impact": "Medium", "confidence": "High"}]}}

0x83a4532eECc06111A6e89792ED8ee45eD43Ebb1d

pragma solidity 0.6.12; pragma experimental ABIEncoderV2; library Address { function isContract( address account ) internal view returns (bool) { uint256 size; assembly { size := extcodesize(account) } return size > 0; } function sendValue( address payable recipient, uint256 amount ) internal { require(address(this).balance >= amount, "Address: insufficient balance"); (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } function functionCall( address target, bytes memory data ) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return _functionCallWithValue(target, data, 0, errorMessage); } function functionCallWithValue( address target, bytes memory data, uint256 value ) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); return _functionCallWithValue(target, data, value, errorMessage); } function _functionCallWithValue( address target, bytes memory data, uint256 weiValue, string memory errorMessage ) private returns (bytes memory) { require(isContract(target), "Address: call to non-contract"); (bool success, bytes memory returndata) = target.call{ value: weiValue }(data); if (success) { return returndata; } else { if (returndata.length > 0) { assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } contract Burneable { /// @dev Declare a private bool {_burningEnabled} /// bool private _burningEnabled; /// @dev Declare a public constant of type bytes32 /// /// @return The bytes32 string of the role /// bytes32 public constant ROLE_BURNER = keccak256("BURNER"); /// @dev Declare two events to expose when burning /// is enabled or disabled, take the event's sender /// as argument /// event BurningEnabled(address indexed _from); event BurningDisabled(address indexed _from); /// @dev Verify if the sender can burn, if yes, /// enable burning /// /// Requirements: /// {_hasRole} should be true /// {_amount} should be superior to 0 /// {_burningEnabled} should be true /// modifier isBurneable( uint256 _amount, bool _hasRole ) { require( _hasRole, "BC:500" ); require( _amount > 0, "BC:30" ); _enableBurning(); require( burningEnabled(), "BC:210" ); _; } /// @dev By default, burning is disabled /// constructor() internal { _burningEnabled = false; } /// @notice Expose the state of {_burningEnabled} /// /// @return The state as a bool /// function burningEnabled() public view returns (bool) { return _burningEnabled; } /// @dev Enable burning by setting {_burningEnabled} /// to true, then emit the related event /// function _enableBurning() internal virtual { _burningEnabled = true; emit BurningEnabled(msg.sender); } /// @dev Disable burning by setting {_burningEnabled} /// to false, then emit the related event /// function _disableBurning() internal virtual { _burningEnabled = false; emit BurningDisabled(msg.sender); } } library EnumerableSet { struct Set { bytes32[] _values; mapping (bytes32 => uint256) _indexes; } function _add( Set storage set, bytes32 value ) private returns (bool) { if (!_contains(set, value)) { set._values.push(value); set._indexes[value] = set._values.length; return true; } else { return false; } } function _remove( Set storage set, bytes32 value ) private returns (bool) { uint256 valueIndex = set._indexes[value]; if (valueIndex != 0) { uint256 toDeleteIndex = valueIndex - 1; uint256 lastIndex = set._values.length - 1; bytes32 lastvalue = set._values[lastIndex]; set._values[toDeleteIndex] = lastvalue; set._indexes[lastvalue] = toDeleteIndex + 1; // All indexes are 1-based set._values.pop(); delete set._indexes[value]; return true; } else { return false; } } function _contains( Set storage set, bytes32 value ) private view returns (bool) { return set._indexes[value] != 0; } function _length( Set storage set ) private view returns (uint256) { return set._values.length; } function _at( Set storage set, uint256 index ) private view returns (bytes32) { require(set._values.length > index, "EnumerableSet: index out of bounds"); return set._values[index]; } struct AddressSet { Set _inner; } function add( AddressSet storage set, address value ) internal returns (bool) { return _add(set._inner, bytes32(uint256(value))); } function remove( AddressSet storage set, address value ) internal returns (bool) { return _remove(set._inner, bytes32(uint256(value))); } function contains( AddressSet storage set, address value ) internal view returns (bool) { return _contains(set._inner, bytes32(uint256(value))); } function length( AddressSet storage set ) internal view returns (uint256) { return _length(set._inner); } function at( AddressSet storage set, uint256 index ) internal view returns (address) { return address(uint256(_at(set._inner, index))); } struct UintSet { Set _inner; } function add( UintSet storage set, uint256 value ) internal returns (bool) { return _add(set._inner, bytes32(value)); } function remove( UintSet storage set, uint256 value ) internal returns (bool) { return _remove(set._inner, bytes32(value)); } function contains( UintSet storage set, uint256 value ) internal view returns (bool) { return _contains(set._inner, bytes32(value)); } function length( UintSet storage set ) internal view returns (uint256) { return _length(set._inner); } function at( UintSet storage set, uint256 index ) internal view returns (uint256) { return uint256(_at(set._inner, index)); } } interface IERC20 { function initialSupply() external view returns (uint256); function totalSupply() external view returns (uint256); function totalSupplyCap() external view returns (uint256); function balanceOf( address account ) external view returns (uint256); function transfer( address recipient, uint256 amount ) external returns (bool); function allowance( address owner, address spender ) external view returns (uint256); function approve( address spender, uint256 amount ) external returns (bool); function transferFrom( address sender, address recipient, uint256 amount ) external returns (bool); event Transfer( address indexed from, address indexed to, uint256 value ); event Approval( address indexed owner, address indexed spender, uint256 value ); } contract Minteable { /// @dev Declare a private bool {_mintingEnabled} /// bool private _mintingEnabled; /// @dev Declare a public constant of type bytes32 /// /// @return The bytes32 string of the role /// bytes32 public constant ROLE_MINTER = keccak256("MINTER"); /// @dev Declare two events to expose when minting /// is enabled or disabled, take the event's sender /// as argument /// event MintingEnabled(address indexed _from); event MintingDisabled(address indexed _from); /// @dev Verify if the sender can mint, if yes, /// enable minting /// /// Requirements: /// {_hasRole} should be true /// {_amount} should be superior to 0 /// {_mintingEnabled} should be true /// modifier isMinteable( uint256 _amount, bool _hasRole ) { require( _hasRole, "MC:500" ); require( _amount > 0, "MC:30" ); _enableMinting(); require( mintingEnabled(), "MC:110" ); _; } /// @dev By default, minting is disabled /// constructor() internal { _mintingEnabled = false; } /// @notice Expose the state of {_mintingEnabled} /// /// @return The state as a bool /// function mintingEnabled() public view returns (bool) { return _mintingEnabled; } /// @dev Enable minting by setting {_mintingEnabled} /// to true, then emit the related event /// function _enableMinting() internal virtual { _mintingEnabled = true; emit MintingEnabled(msg.sender); } /// @dev Disable minting by setting {_mintingEnabled} /// to false, then emit the related event /// function _disableMinting() internal virtual { _mintingEnabled = false; emit MintingDisabled(msg.sender); } } abstract contract Roleplay { using EnumerableSet for EnumerableSet.AddressSet; /// @dev Structure declaration of {RoleData} data model /// struct RoleData { EnumerableSet.AddressSet members; bytes32 ownerRole; } mapping (bytes32 => RoleData) private _roles; /// @dev Declare a public constant of type bytes32 /// /// @return The bytes32 string of the role /// bytes32 public constant ROLE_OWNER = 0x00; /// @dev Declare a public constant of type bytes32 /// /// @return The bytes32 string of the role /// bytes32 public constant ROLE_MANAGER = keccak256("MANAGER"); /// @dev Declare two events to expose role /// modifications /// event RoleGranted(bytes32 indexed _role, address indexed _from, address indexed _sender); event RoleRevoked(bytes32 indexed role, address indexed _from, address indexed _sender); /// @dev Verify if the sender have Owner's role /// /// Requirements: /// {_hasRole()} should be true /// modifier onlyOwner() { require( hasRole(ROLE_OWNER, msg.sender), "RPC:500" ); _; } /// @notice This function verify is the {_account} /// has role {_role} /// /// @param _role - The bytes32 string of the role /// @param _account - The address to verify /// /// @return true/false depending the result /// function hasRole( bytes32 _role, address _account ) public view returns (bool) { return _roles[_role].members.contains(_account); } /// @notice Expose the length of members[] for /// a given {_role} /// /// @param _role - The bytes32 string of the role /// /// @return - The length of members /// function getRoleMembersLength( bytes32 _role ) public view returns (uint256) { return _roles[_role].members.length(); } /// @notice Expose the member address for /// a given {_role} at the {_id} index /// /// @param _id - Index to watch for /// @param _role - The bytes32 string of the role /// /// @return - The address of the member at {_id} index /// function exposeRoleMember( bytes32 _role, uint256 _id ) public view returns (address) { return _roles[_role].members.at(_id); } /// @notice This function allow the current Owner /// to transfer his ownership /// /// @dev Requirements: /// See {Roleplay::onlyOwner()} /// /// @param _to - Represent address of the receiver /// function transferOwnerRole( address _to ) public virtual onlyOwner() { _grantRole(ROLE_OWNER, _to); _revokeRole(ROLE_OWNER, msg.sender); } /// @notice This function allow the current Owner /// to give the Manager Role to {_to} address /// /// @dev Requirements: /// See {Roleplay::onlyOwner()} /// /// @param _to - Represent address of the receiver /// function grantManagerRole( address _to ) public virtual onlyOwner() { _grantRole(ROLE_MANAGER, _to); } /// @notice This function allow a Manager to grant /// role to a given address, it can't grant Owner role /// /// @dev Requirements: /// {_hasRole()} should be true /// {_role} should be different of ROLE_OWNER /// /// @param _role - The bytes32 string of the role /// @param _to - Represent address of the receiver /// function grantRole( bytes32 _role, address _to ) public virtual { require( hasRole(ROLE_MANAGER, msg.sender), "RPC:510" ); require( _role != ROLE_OWNER, "RPC:520" ); if (!hasRole(ROLE_OWNER, msg.sender)) { require( _role == keccak256("CHAIRPERSON"), "RPC:530" ); } _grantRole(_role, _to); } /// @notice This function allow a Manager to revoke /// role to a given address, it can't revoke Owner role /// /// @dev Requirements: /// {_hasRole()} should be true /// {_role} should be different of ROLE_OWNER /// /// @param _role - The bytes32 string of the role /// @param _to - Represent address of the receiver /// function revokeRole( bytes32 _role, address _to ) public virtual { require( hasRole(ROLE_MANAGER, msg.sender), "RPC:550" ); require( _role != ROLE_OWNER, "RPC:540" ); if (!hasRole(ROLE_OWNER, msg.sender)) { require( _role == keccak256("CHAIRPERSON"), "RPC:530" ); } _revokeRole(_role, _to); } /// @notice This function allow anyone to revoke his /// own role, even an Owner, use it carefully! /// /// @param _role - The bytes32 string of the role /// function renounceRole( bytes32 _role ) public virtual { require( _role != ROLE_OWNER, "RPC:540" ); require( hasRole(_role, msg.sender), "RPC:570" ); _revokeRole(_role, msg.sender); } function _setupRole( bytes32 _role, address _to ) internal virtual { _grantRole(_role, _to); } function _grantRole( bytes32 _role, address _to ) private { if (_roles[_role].members.add(_to)) { emit RoleGranted(_role, _to, msg.sender); } } function _revokeRole( bytes32 _role, address _to ) private { if (_roles[_role].members.remove(_to)) { emit RoleRevoked(_role, _to, msg.sender); } } } library SafeMath { function add( uint256 a, uint256 b ) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } function sub( uint256 a, uint256 b ) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } function sub( uint256 a, uint256 b, string memory errorMessage ) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } function mul( uint256 a, uint256 b ) internal pure returns (uint256) { if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } function div( uint256 a, uint256 b ) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } function div( uint256 a, uint256 b, string memory errorMessage ) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; return c; } function mod( uint256 a, uint256 b ) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } function mod( uint256 a, uint256 b, string memory errorMessage ) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } abstract contract Stakeable is Roleplay { /// @dev Declare an internal variable of type uint256 /// uint256 internal _totalStakedSupply; /// @dev Declare an internal variable of type uint256 /// uint256 internal _maxRewardRatio; /// @dev Structure declaration of {Stakeholder} data model /// struct Stakeholder { address owner; uint256 stake; uint256 availableReward; uint256 totalRewardEarned; uint256 totalRewardSpent; uint256 createdAt; uint256 lastRewardCalculatedAt; } /// @dev Declare two events to expose when stake /// or unstake is requested, take the event's /// sender as argument and the requested amount /// event Staked(address indexed _from, uint256 _amount); event Unstaked(address indexed _from, uint256 _amount); /// @dev Declare an array of {Stakeholder} /// Stakeholder[] stakeholders; /// @dev Verify if the amount is superior to 0 /// /// Requirements: /// {_amount} should be superior to 0 /// /// @param _amount - Represent the requested amount /// modifier isAmountNotZero(uint256 _amount) { require( _amount > 0, "SC:630" ); _; } /// @dev Verify if the amount is a valid amount /// /// Requirements: /// {_amount} should be inferior or equal to 10 /// /// @param _amount - Represent the requested amount /// @param _balance - Represent the sender balance /// modifier isAmountValid(uint256 _amount, uint256 _balance) { require( (_amount * (10**8)) <= _balance, "SC:640" ); _; } /// @dev Verify if the amount is a valid amount to unstake /// /// Requirements: /// {_amount} should be inferior or equal to staked value /// /// @param _amount - Represent the requested amount /// modifier isAbleToUnstake(uint256 _amount) { Stakeholder memory stakeholder = exposeStakeholder(msg.sender); require( _amount <= stakeholder.stake, "SC:640" ); _; } constructor() public { _maxRewardRatio = 10; } /// @notice Expose the total staked supply /// /// @return The uint256 value of {_totalStakedSupply} /// function totalStakedSupply() public view returns (uint256) { return _totalStakedSupply; } /// @notice Expose the max reward ratio /// /// @return The uint256 value of {_maxRewardRatio} /// function maxRewardRatio() public view returns (uint256) { return _maxRewardRatio; } /// @notice Expose every Stakeholders /// /// @return A tuple of Stakeholders /// function exposeStakeholders() public view returns (Stakeholder[] memory) { return stakeholders; } /// @notice Expose a Stakeholder from the Owner address /// /// @param _owner - Represent the address of the stakeholder owner /// /// @return A tuple of Stakeholder /// function exposeStakeholder( address _owner ) public view returns (Stakeholder memory) { uint256 i = 0; uint256 len = stakeholders.length; while (i < len) { if (stakeholders[i].owner == _owner) { return stakeholders[i]; } i++; } } /// @notice Set the {_maxRewardRatio} /// /// @dev Only owner can use this function /// /// @param _amount - Represent the requested ratio /// function setMaxRewardRatio( uint256 _amount ) public virtual onlyOwner() { _maxRewardRatio = _amount; } /// @notice Create a new {Stakeholder} /// /// @dev Owner is the sender /// /// @param _owner - Represent the owner of the Stakeholder /// function _createStakeholder( address _owner ) internal virtual { stakeholders.push(Stakeholder({ owner: _owner, stake: 0, createdAt: now, availableReward: 0, totalRewardEarned: 0, totalRewardSpent: 0, lastRewardCalculatedAt: 0 })); } /// @notice This function compute the reward gained from staking /// UnissouToken /// /// @dev The calculation is pretty simple, a {Stakeholder} /// holds the date of the {Stakeholder}'s creation. If the /// reward hasn't been computed since the creation, the /// algorithm will calculate them based on the number of /// days passed since the creation of the stakeholding. /// Then the calculation's date will be saved onto the /// {Stakeholder} and when {_computeReward} will be called /// again, the reward calculation will take this date in /// consideration to compute the reward. /// /// The actual ratio is 1 Stake = 1 Reward. /// With a maximum of 10 tokens per stake, /// you can obtain a total of 10 rewards per day /// /// @param _id - Represent the Stakeholder index /// function _computeReward( uint256 _id ) internal virtual { uint256 stake = stakeholders[_id].stake; uint256 lastCalculatedReward = stakeholders[_id].lastRewardCalculatedAt; uint256 createdAt = stakeholders[_id].createdAt; if (lastCalculatedReward == 0) { if (createdAt < now) { if ((now - createdAt) >= 1 days) { stakeholders[_id].availableReward += (((now - createdAt) / 1 days) * ( stake <= _maxRewardRatio ? stake : _maxRewardRatio )); stakeholders[_id].totalRewardEarned += (((now - createdAt) / 1 days) * ( stake <= _maxRewardRatio ? stake : _maxRewardRatio )); stakeholders[_id].lastRewardCalculatedAt = now; return; } } } if (lastCalculatedReward != 0) { if (lastCalculatedReward < now) { if ((now - lastCalculatedReward) >= 1 days) { stakeholders[_id].availableReward += (((now - lastCalculatedReward) / 1 days) * ( stake <= _maxRewardRatio ? stake : _maxRewardRatio )); stakeholders[_id].totalRewardEarned += (((now - lastCalculatedReward) / 1 days) * ( stake <= _maxRewardRatio ? stake : _maxRewardRatio )); stakeholders[_id].lastRewardCalculatedAt = now; return; } } } } } abstract contract Voteable is Roleplay { /// @dev Declare an internal variable of type uint256 /// uint256 internal _minVoteBalance; /// @dev Structure declaration of {Proposal} data model /// struct Proposal { address creator; string name; string metadataURI; bool votingEnabled; uint256 positiveVote; uint256 negativeVote; address[] positiveVoters; address[] negativeVoters; } /// @dev Declare a public constant of type bytes32 /// /// @return The bytes32 string of the role /// bytes32 public constant ROLE_CHAIRPERSON = keccak256("CHAIRPERSON"); /// @dev Declare an array of {Proposal} /// Proposal[] proposals; /// @dev Verify if the sender have the chairperson role /// /// Requirements: /// {_hasRole} should be true /// modifier isChairperson() { require( hasRole(ROLE_CHAIRPERSON, msg.sender), "VC:500" ); _; } /// @dev Verify if the sender is a valid voter /// /// Requirements: /// {_balance} should be superior to 1 /// {_voter} should haven't already voted /// /// @param _id - Represent the proposal index /// @param _balance - Represent the sender balance /// modifier isValidVoter( uint256 _id, uint256 _balance ) { require( _balance >= (_minVoteBalance * (10**8)), "VC:1010" ); bool positiveVote = _checkSenderHasVoted(proposals[_id].positiveVoters, msg.sender); bool negativeVote = _checkSenderHasVoted(proposals[_id].negativeVoters, msg.sender); require( !positiveVote && !negativeVote, "VC:1020" ); _; } /// @dev Verify if the proposal have voting enabled /// /// Requirements: /// {proposals[_id]} should have voting enabled /// /// @param _id - Represent the proposal index /// modifier isVoteEnabled( uint256 _id ) { require( proposals[_id].votingEnabled, "VC:1030" ); _; } constructor() public { _minVoteBalance = 100; } /// @notice Expose the min balance required to vote /// /// @return The uint256 value of {_minVoteBalance} /// function minVoteBalance() public view returns (uint256) { return _minVoteBalance; } /// @notice Set the {_minVoteBalance} /// /// @dev Only owner can use this function /// /// @param _amount - Represent the requested ratio /// function setMinVoteBalance( uint256 _amount ) public virtual onlyOwner() { _minVoteBalance = _amount; } /// @notice Allow a chairperson to create a new {Proposal} /// /// @dev Sender should be a chairperson /// /// Requirements: /// See {Voteable::isChairperson()} /// /// @param _name - Represent the Proposal name /// @param _uri - Represent the Proposal metadata uri /// @param _enable - Represent if vote is enable/disable /// function createProposal( string memory _name, string memory _uri, bool _enable ) public virtual isChairperson() { proposals.push( Proposal({ creator: msg.sender, name: _name, metadataURI: _uri, votingEnabled: _enable, positiveVote: 0, negativeVote: 0, positiveVoters: new address[](0), negativeVoters: new address[](0) }) ); } /// @notice Allow a chairperson to enable/disable voting /// for a proposal /// /// @dev Sender should be a chairperson /// /// Requirements: /// See {Voteable::isChairperson()} /// /// @param _id - Represent a proposal index /// function enableProposal( uint256 _id ) public virtual isChairperson() { proposals[_id].votingEnabled ? proposals[_id].votingEnabled = false : proposals[_id].votingEnabled = true; } /// @notice Expose all proposals /// /// @return A tuple of Proposal /// function exposeProposals() public view returns (Proposal[] memory) { return proposals; } /// @notice Verify if the sender have already voted /// for a proposal /// /// @dev The function iterate hover the {_voters} /// to know if the sender have already voted /// /// @param _voters - Represent the positive/negative /// voters of a proposal /// function _checkSenderHasVoted( address[] memory _voters, address _voter ) private pure returns (bool) { uint256 i = 0; bool voted = false; uint256 len = _voters.length; while (i < len) { if (_voters[i] == _voter) { voted = true; break; } i++; } return voted; } } abstract contract ERC20 is IERC20 { using SafeMath for uint256; using Address for address; mapping (address => uint256) private _balances; mapping (address => mapping (address => uint256)) private _allowances; uint256 private _initialSupply; uint256 private _totalSupply; uint256 private _totalSupplyCap; string private _name; string private _symbol; uint8 private _decimals; constructor ( string memory name, string memory symbol, uint256 totalSupplyCap, uint256 initialSupply ) public { _decimals = 8; _name = name; _symbol = symbol; _totalSupplyCap = totalSupplyCap; _initialSupply = initialSupply; } function name() public view returns (string memory) { return _name; } function symbol() public view returns (string memory) { return _symbol; } function decimals() public view returns (uint8) { return _decimals; } function initialSupply() public view override returns (uint256) { return _initialSupply; } function totalSupply() public view override returns (uint256) { return _totalSupply; } function totalSupplyCap() public view override returns (uint256) { return _totalSupplyCap; } function balanceOf( address account ) public view override returns (uint256) { return _balances[account]; } function transfer( address recipient, uint256 amount ) public virtual override returns (bool) { _transfer(msg.sender, recipient, amount); return true; } function allowance( address owner, address spender ) public view virtual override returns (uint256) { return _allowances[owner][spender]; } function approve( address spender, uint256 amount ) public virtual override returns (bool) { _approve(msg.sender, spender, (amount * (10**8))); return true; } function transferFrom( address sender, address recipient, uint256 amount ) public virtual override returns (bool) { _transfer(sender, recipient, amount); _approve(sender, msg.sender, _allowances[sender][msg.sender].sub((amount * (10**8)), "ERC20:490")); return true; } function increaseAllowance( address spender, uint256 addedValue ) public virtual returns (bool) { _approve(msg.sender, spender, _allowances[msg.sender][spender].add((addedValue * (10**8)))); return true; } function decreaseAllowance( address spender, uint256 subtractedValue ) public virtual returns (bool) { _approve(msg.sender, spender, _allowances[msg.sender][spender].sub((subtractedValue * (10**8)), "ERC20:495")); return true; } function _transfer( address sender, address recipient, uint256 amount ) internal virtual { require( sender != address(0), "ERC20:410" ); require( recipient != address(0), "ERC20:420" ); require( amount > 0, "ERC20:480" ); _beforeTokenTransfer(sender, recipient, amount); _balances[sender] = _balances[sender].sub(amount, "ERC20:470"); _balances[recipient] = _balances[recipient].add(amount); emit Transfer(sender, recipient, amount); } function _mint( address account, uint256 amount ) internal virtual { require( account != address(0), "ERC20:120" ); _beforeTokenTransfer(address(0), account, amount); _totalSupply = _totalSupply.add(amount); _balances[account] = _balances[account].add(amount); emit Transfer(address(0), account, amount); } function _burn( address account, uint256 amount ) internal virtual { require( account != address(0), "ERC20:220" ); _beforeTokenTransfer(account, address(0), amount); _balances[account] = _balances[account].sub(amount, "ERC20:230"); _totalSupply = _totalSupply.sub(amount); emit Transfer(account, address(0), amount); } function _approve( address owner, address spender, uint256 amount ) internal virtual { require( owner != address(0), "ERC20:450" ); require( spender != address(0), "ERC20:460" ); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } function _setupDecimals( uint8 decimals_ ) internal { _decimals = decimals_; } function _beforeTokenTransfer( address from, address to, uint256 amount ) internal virtual {} } contract Pauseable is Roleplay { /// @dev Declare a private bool {_paused} /// bool private _paused; /// @dev Declare two events to expose when pause /// is enabled or disabled, take the event's sender /// as argument /// event Paused(address indexed _from); event Unpaused(address indexed _from); /// @dev Verify if the contract is not paused /// /// Requirements: /// {_paused} should be false /// modifier whenNotPaused() { require( !_paused, "PC:300" ); _; } /// @dev Verify if the contract is paused /// /// Requirements: /// {_paused} should be true /// modifier whenPaused() { require( _paused, "PC:310" ); _; } /// @dev By default, pause is disabled /// constructor () internal { _paused = false; } /// @notice Expose the state of {_paused} /// /// @return The state as a bool /// function paused() public view returns (bool) { return _paused; } /// @dev Enable pause by setting {_paused} /// to true, then emit the related event /// function pause() public virtual whenNotPaused() onlyOwner() { _paused = true; emit Paused(msg.sender); } /// @dev Disable pause by setting {_paused} /// to false, then emit the related event /// function unpause() public virtual whenPaused() onlyOwner() { _paused = false; emit Unpaused(msg.sender); } } abstract contract UnissouToken is ERC20, Roleplay, Pauseable, Minteable, Burneable { /// @notice Original contract's deployer are granted /// with Owner role and Manager role and the initial /// supply are minted onto his wallet. /// /// @dev See {ERC20} /// constructor() public ERC20( "Unissou", "YTG", 384400 * (10**8), 96100 * (10**8) ) { _setupRole(ROLE_OWNER, msg.sender); _setupRole(ROLE_MANAGER, msg.sender); _mint(msg.sender, initialSupply()); } /// @notice This function allows to transfer tokens to multiple /// addresses in only one transaction, that help to reduce fees. /// The amount cannot be dynamic and is constant for all transfer /// /// @param _receivers - Represent an array of address /// @param _amount - Represent the amount of token to transfer /// function transferBatch( address[] memory _receivers, uint256 _amount ) public virtual { uint256 i = 0; uint256 len = _receivers.length; require( balanceOf(msg.sender) >= ((_amount * len) * (10**8)), "UT:470" ); while (i < len) { transfer(_receivers[i], _amount); i++; } } /// @notice This function allows the sender to mint /// an {_amount} of token unless the {_amount} /// exceed the total supply cap /// /// @dev Once the minting is down, minting is disabled /// /// Requirements: /// See {Minteable::isMinteable()} /// /// @param _amount - Represent the amount of token /// to be minted /// function mint( uint256 _amount ) public virtual isMinteable( _amount, hasRole(ROLE_MINTER, msg.sender) ) { _mint(msg.sender, (_amount * (10**8))); _disableMinting(); } /// @notice This function allows the sender to mint /// an {_amount} of token directly onto the address {_to} /// unless the {_amount} exceed the total supply cap /// /// @dev Once the minting is down, minting is disabled /// /// Requirements: /// See {Minteable::isMinteable()} /// /// @param _to - Represent the token's receiver /// @param _amount - Represent the amount of token /// to be minted /// function mintTo( address _to, uint256 _amount ) public virtual isMinteable( _amount, hasRole(ROLE_MINTER, msg.sender) ) { _mint(_to, (_amount * (10**8))); _disableMinting(); } /// @notice This function allows the sender to burn /// an {_amount} of token /// /// @dev Once the burning is down, burning is disabled /// /// Requirements: /// See {Burneable::isBurneable()} /// /// @param _amount - Represent the amount of token /// to be burned /// function burn( uint256 _amount ) public virtual isBurneable( _amount, hasRole(ROLE_BURNER, msg.sender) ) { _burn(msg.sender, (_amount * (10**8))); _disableBurning(); } /// @notice This function allows the sender to burn /// an {_amount} of token directly from the address {_from} /// only if the token allowance is superior or equal /// to the requested {_amount} /// /// @dev Once the burning is down, burning is disabled /// /// Requirements: /// See {Burneable::isBurneable()} /// /// @param _from - Represent the token's receiver /// @param _amount - Represent the amount of token /// to be burned /// function burnFrom( address _from, uint256 _amount ) public virtual isBurneable( _amount, hasRole(ROLE_BURNER, msg.sender) ) { uint256 decreasedAllowance = allowance(_from, msg.sender).sub((_amount * (10**8))); _approve(_from, msg.sender, decreasedAllowance); _burn(_from, (_amount * (10**8))); _disableBurning(); } /// @notice This function does verification before /// any token transfer. The actual verification are: /// - If the total supply don't exceed the total /// supply cap (for example, when token are minted), /// - If the token's transfer are not paused /// function _beforeTokenTransfer( address from, address to, uint256 amount ) internal virtual override { super._beforeTokenTransfer(from, to, amount); if (from == address(0)) { require( totalSupply().add(amount) <= totalSupplyCap(), "UT:20" ); } require( !paused(), "UT:400" ); } } abstract contract UnissouDAO is Voteable, UnissouToken { /// @notice ROLE_CHAIRPERSON is granted to the /// original contract deployer /// /// @dev See {Roleplay::grantRole()} /// constructor() public { grantRole(ROLE_CHAIRPERSON, msg.sender); } /// @notice This function allows the sender to vote /// for a proposal, the vote can be positive or negative. /// The sender has to complete the requirements to be /// able to vote for a proposal. /// /// @dev Depending on the value of {_isPositiveVote}, add a /// *positive/negative* vote to the proposal, identified /// by its {_id}, then push the sender address into the /// voters pool of the proposal /// /// Requirements: /// See {Voteable::isValidVoter()} /// See {Voteable::isVoteEnabled()} /// /// @param _id - Represent the proposal id /// @param _isPositiveVote - Represent the vote type /// function voteForProposal( uint256 _id, bool _isPositiveVote ) public virtual isValidVoter( _id, balanceOf(msg.sender) ) isVoteEnabled( _id ) { if (_isPositiveVote) { proposals[_id].positiveVote += 1; proposals[_id].positiveVoters.push(msg.sender); } if (!_isPositiveVote) { proposals[_id].negativeVote += 1; proposals[_id].negativeVoters.push(msg.sender); } } } abstract contract UnissouDApp is Stakeable, UnissouToken { /// @notice This function allows the sender to stake /// an amount (maximum 10) of UnissouToken, when the /// token is staked, it is burned from the circulating /// supply and placed into the staking pool /// /// @dev The function iterate through {stakeholders} to /// know if the sender is already a stakeholder. If the /// sender is already a stakeholder, then the requested amount /// is staked into the pool and then burned from the sender wallet. /// If the sender isn't a stakeholer, a new stakeholder is created, /// and then the function is recall to stake the requested amount /// /// Requirements: /// See {Stakeable::isAmountValid()} /// /// @param _amount - Represent the amount of token to be staked /// function stake( uint256 _amount ) public virtual isAmountValid( _amount, balanceOf(msg.sender) ) isAmountNotZero( _amount ) { uint256 i = 0; bool isStakeholder = false; uint256 len = stakeholders.length; while (i < len) { if (stakeholders[i].owner == msg.sender) { isStakeholder = true; break; } i++; } if (isStakeholder) { stakeholders[i].stake += _amount; _burn(msg.sender, (_amount * (10**8))); _totalStakedSupply += (_amount * (10**8)); emit Staked(msg.sender, _amount); } if (!isStakeholder) { _createStakeholder(msg.sender); stake(_amount); } } /// @notice This function unstacks the sender staked /// balance depending on the requested {_amount}, if the /// {_amount} exceeded the staked supply of the sender, /// the whole staked supply of the sender will be unstacked /// and withdrawn to the sender wallet without exceeding it. /// /// @dev Like stake() function do, this function iterate /// over the stakeholders to identify if the sender is one /// of them, in the case of the sender is identified as a /// stakeholder, then the {_amount} is minted to the sender /// wallet and sub from the staked supply. /// /// Requirements: /// See {Stakeable::isAmountNotZero} /// See {Stakeable::isAbleToUnstake} /// /// @param _amount - Represent the amount of token to be unstack /// function unstake( uint256 _amount ) public virtual isAmountNotZero( _amount ) isAbleToUnstake( _amount ) { uint256 i = 0; bool isStakeholder = false; uint256 len = stakeholders.length; while (i < len) { if (stakeholders[i].owner == msg.sender) { isStakeholder = true; break; } i++; } require( isStakeholder, "SC:650" ); if (isStakeholder) { if (_amount <= stakeholders[i].stake) { stakeholders[i].stake -= _amount; _mint(msg.sender, (_amount * (10**8))); _totalStakedSupply -= (_amount * (10**8)); emit Unstaked(msg.sender, _amount); } } } /// @notice This function allows the sender to compute /// his reward earned by staking {UnissouToken}. When you /// request a withdraw, the function updates the reward's /// value of the sender stakeholding onto the Ethereum /// blockchain, allowing him to spend the reward for NFTs. /// /// @dev The same principe as other functions is applied here, /// iteration over stakeholders, when found, execute the action. /// See {Stakeable::_computeReward()} /// function withdraw() public virtual { uint256 i = 0; bool isStakeholder = false; uint256 len = stakeholders.length; while (i < len) { if (stakeholders[i].owner == msg.sender) { isStakeholder = true; break; } i++; } require( isStakeholder, "SC:650" ); if (isStakeholder) { _computeReward(i); } } /// @notice This function allows the sender to spend {_amount} /// of his rewards gained from his stake. /// /// @dev To reduce the potential numbers of transaction, the /// {_computeReward()} function is also executed into this function. /// Like that you can spend your reward without doing a double /// transaction like: first withdraw to compute, then spend. /// /// @param _amount - Represent the amount of reward to spend /// function spend( uint256 _amount ) public virtual { uint256 i = 0; bool isStakeholder = false; uint256 len = stakeholders.length; while (i < len) { if (stakeholders[i].owner == msg.sender) { isStakeholder = true; break; } i++; } require( isStakeholder, "SC:650" ); if (isStakeholder) { _computeReward(i); require( _amount <= stakeholders[i].availableReward, "SC:660" ); stakeholders[i].availableReward -= _amount; stakeholders[i].totalRewardSpent += _amount; } } } contract Unissou is UnissouDAO, UnissouDApp { /// @notice Declare a public constant of type string /// /// @return The smart contract author /// string public constant CREATOR = "unissou.com"; }

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{"success": true, "error": null, "results": {"detectors": [{"check": "divide-before-multiply", "impact": "Medium", "confidence": "Medium"}, {"check": "incorrect-equality", "impact": "Medium", "confidence": "High"}]}}

0x8433ed02a32154aa0edbae12b1c8816205d6d02c

pragma solidity 0.5.17; interface IERC20FeeProxy { event TransferWithReferenceAndFee( address tokenAddress, address to, uint256 amount, bytes indexed paymentReference, uint256 feeAmount, address feeAddress ); function transferFromWithReferenceAndFee( address _tokenAddress, address _to, uint256 _amount, bytes calldata _paymentReference, uint256 _feeAmount, address _feeAddress ) external; } interface IUniswapV2Router02 { function swapTokensForExactTokens( uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline ) external returns (uint[] memory amounts); } interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } contract Context { function _msgSender() internal view returns (address payable) { return msg.sender; } function _msgData() internal view returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor () internal { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), msgSender); } /** * @dev Returns the address of the current owner. */ function owner() public view returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(_owner == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public onlyOwner { emit OwnershipTransferred(_owner, address(0)); _owner = address(0); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } } library SafeERC20 { /** * @notice Call transferFrom ERC20 function and validates the return data of a ERC20 contract call. * @dev This is necessary because of non-standard ERC20 tokens that don't have a return value. * @return The return value of the ERC20 call, returning true for non-standard tokens */ function safeTransferFrom(IERC20 _token, address _from, address _to, uint256 _amount) internal returns (bool result) { // solium-disable-next-line security/no-low-level-calls (bool success, bytes memory data) = address(_token).call(abi.encodeWithSignature( "transferFrom(address,address,uint256)", _from, _to, _amount )); return success && (data.length == 0 || abi.decode(data, (bool))); } /** * @notice Call approve ERC20 function and validates the return data of a ERC20 contract call. * @dev This is necessary because of non-standard ERC20 tokens that don't have a return value. * @return The return value of the ERC20 call, returning true for non-standard tokens */ function safeApprove(IERC20 _token, address _spender, uint256 _amount) internal returns (bool result) { // solium-disable-next-line security/no-low-level-calls (bool success, bytes memory data) = address(_token).call(abi.encodeWithSignature( "approve(address,uint256)", _spender, _amount )); return success && (data.length == 0 || abi.decode(data, (bool))); } /** * @notice Call transfer ERC20 function and validates the return data of a ERC20 contract call. * @dev This is necessary because of non-standard ERC20 tokens that don't have a return value. * @return The return value of the ERC20 call, returning true for non-standard tokens */ function safeTransfer(IERC20 _token, address _to, uint256 _amount) internal returns (bool result) { // solium-disable-next-line security/no-low-level-calls (bool success, bytes memory data) = address(_token).call(abi.encodeWithSignature( 'transfer(address,uint256)', _to, _amount )); return success && (data.length == 0 || abi.decode(data, (bool))); } } contract ERC20SwapToPay is Ownable { using SafeERC20 for IERC20; IUniswapV2Router02 public swapRouter; IERC20FeeProxy public paymentProxy; constructor(address _swapRouterAddress, address _paymentProxyAddress) public { swapRouter = IUniswapV2Router02(_swapRouterAddress); paymentProxy = IERC20FeeProxy(_paymentProxyAddress); } /** * @notice Authorizes the proxy to spend a new request currency (ERC20). * @param _erc20Address Address of an ERC20 used as a request currency */ function approvePaymentProxyToSpend(address _erc20Address) public { IERC20 erc20 = IERC20(_erc20Address); uint256 max = 2**256 - 1; erc20.safeApprove(address(paymentProxy), max); } /** * @notice Authorizes the swap router to spend a new payment currency (ERC20). * @param _erc20Address Address of an ERC20 used for payment */ function approveRouterToSpend(address _erc20Address) public { IERC20 erc20 = IERC20(_erc20Address); uint256 max = 2**256 - 1; erc20.safeApprove(address(swapRouter), max); } /** * @notice Performs a token swap between a payment currency and a request currency, and then * calls a payment proxy to pay the request, including fees. * @param _to Transfer recipient = request issuer * @param _amount Amount to transfer in request currency * @param _amountInMax Maximum amount allowed to spend for currency swap, in payment currency. This amount should take into account the fees. @param _path, path of ERC20 tokens to swap from requestedToken to spentToken. The first address of the path should be the payment currency. The last element should be the request currency. * @param _paymentReference Reference of the payment related * @param _feeAmount Amount of the fee in request currency * @param _feeAddress Where to pay the fee * @param _deadline Deadline for the swap to be valid */ function swapTransferWithReference( address _to, uint256 _amount, // requestedToken uint256 _amountInMax, // spentToken address[] calldata _path, // from requestedToken to spentToken bytes calldata _paymentReference, uint256 _feeAmount, // requestedToken address _feeAddress, uint256 _deadline ) external { IERC20 spentToken = IERC20(_path[0]); IERC20 requestedToken = IERC20(_path[_path.length-1]); uint256 requestedTotalAmount = _amount + _feeAmount; require(spentToken.allowance(msg.sender, address(this)) > _amountInMax, "Not sufficient allowance for swap to pay."); require(spentToken.safeTransferFrom(msg.sender, address(this), _amountInMax), "Could not transfer payment token from swapper-payer"); // Allow the router to spend all this contract's spentToken if (spentToken.allowance(address(this),address(swapRouter)) < _amountInMax) { approveRouterToSpend(address(spentToken)); } swapRouter.swapTokensForExactTokens( requestedTotalAmount, _amountInMax, _path, address(this), _deadline ); // Allow the payment network to spend all this contract's requestedToken if (requestedToken.allowance(address(this),address(paymentProxy)) < requestedTotalAmount) { approvePaymentProxyToSpend(address(requestedToken)); } // Pay the request and fees paymentProxy.transferFromWithReferenceAndFee( address(requestedToken), _to, _amount, _paymentReference, _feeAmount, _feeAddress ); // Give the change back to the payer, in both currencies (only spent token should remain) if (spentToken.balanceOf(address(this)) > 0) { spentToken.safeTransfer(msg.sender, spentToken.balanceOf(address(this))); } if (requestedToken.balanceOf(address(this)) > 0) { requestedToken.safeTransfer(msg.sender, requestedToken.balanceOf(address(this))); } } /* * Admin functions to edit the admin, router address or proxy address */ function setPaymentProxy(address _paymentProxyAddress) public onlyOwner { paymentProxy = IERC20FeeProxy(_paymentProxyAddress); } function setRouter(address _newSwapRouterAddress) public onlyOwner { swapRouter = IUniswapV2Router02(_newSwapRouterAddress); } }

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{"success": true, "error": null, "results": {"detectors": [{"check": "unused-return", "impact": "Medium", "confidence": "Medium"}]}}

0x84841e552a021224de716b7be89747bb2d62d642

pragma solidity 0.7.0; library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // This method relies in extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. uint256 size; // solhint-disable-next-line no-inline-assembly assembly { size := extcodesize(account) } return size > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain`call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return _functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); return _functionCallWithValue(target, data, value, errorMessage); } function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) { require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: weiValue }(data); if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } abstract contract Context { function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } interface IStableCoin { function init( string calldata name, string calldata symbol, address doubleProxy, address[] calldata allowedPairs, uint256[] calldata rebalanceRewardMultiplier, uint256[] calldata timeWindows, uint256[] calldata mintables ) external; function tierData() external view returns(uint256[] memory, uint256[] memory); function availableToMint() external view returns(uint256); function doubleProxy() external view returns (address); function setDoubleProxy(address newDoubleProxy) external; function allowedPairs() external view returns (address[] memory); function setAllowedPairs(address[] calldata newAllowedPairs) external; function rebalanceRewardMultiplier() external view returns (uint256[] memory); function differences() external view returns (uint256, uint256); function calculateRebalanceByDebtReward(uint256 burnt) external view returns (uint256); function fromTokenToStable(address tokenAddress, uint256 amount) external view returns (uint256); function mint( uint256 pairIndex, uint256 amount0, uint256 amount1, uint256 amount0Min, uint256 amount1Min ) external returns (uint256); function burn( uint256 pairIndex, uint256 pairAmount, uint256 amount0, uint256 amount1 ) external returns (uint256, uint256); function rebalanceByCredit( uint256 pairIndex, uint256 pairAmount, uint256 amount0, uint256 amount1 ) external returns (uint256); function rebalanceByDebt(uint256 amount) external returns(uint256); } interface IDoubleProxy { function proxy() external view returns (address); } interface IMVDProxy { function getToken() external view returns (address); function getMVDFunctionalitiesManagerAddress() external view returns (address); function getMVDWalletAddress() external view returns (address); function getStateHolderAddress() external view returns (address); function submit(string calldata codeName, bytes calldata data) external payable returns (bytes memory returnData); } interface IMVDFunctionalitiesManager { function isAuthorizedFunctionality(address functionality) external view returns (bool); } interface IStateHolder { function getBool(string calldata varName) external view returns (bool); function getUint256(string calldata varName) external view returns (uint256); } interface IUniswapV2Router { function getAmountsOut(uint256 amountIn, address[] calldata path) external view returns (uint256[] memory amounts); function removeLiquidity( address tokenA, address tokenB, uint256 liquidity, uint256 amountAMin, uint256 amountBMin, address to, uint256 deadline ) external returns (uint256 amountA, uint256 amountB); function addLiquidity( address tokenA, address tokenB, uint256 amountADesired, uint256 amountBDesired, uint256 amountAMin, uint256 amountBMin, address to, uint256 deadline ) external returns ( uint256 amountA, uint256 amountB, uint256 liquidity ); } interface IUniswapV2Pair { function decimals() external pure returns (uint8); function totalSupply() external view returns (uint256); function token0() external view returns (address); function token1() external view returns (address); function balanceOf(address account) external view returns (uint256); function getReserves() external view returns ( uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast ); } library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } abstract contract ERC20 is Context, IERC20 { using SafeMath for uint256; using Address for address; mapping(address => uint256) private _balances; mapping(address => mapping(address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; uint8 private _decimals; /** * @dev Sets the values for {name} and {symbol}, initializes {decimals} with * a default value of 18. * * To select a different value for {decimals}, use {_setupDecimals}. * * All three of these values are immutable: they can only be set once during * construction. */ function init(string memory name, string memory symbol) internal { require( keccak256(bytes(_symbol)) == keccak256(""), "Init already Called!" ); _name = name; _symbol = symbol; _decimals = 18; } /** * @dev Returns the name of the token. */ function name() public view returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5,05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is * called. * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view returns (uint8) { return _decimals; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public override view returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public override view returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `recipient` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address recipient, uint256 amount) public virtual override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public virtual override view returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { _approve(_msgSender(), spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}; * * Requirements: * - `sender` and `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. * - the caller must have allowance for ``sender``'s tokens of at least * `amount`. */ function transferFrom( address sender, address recipient, uint256 amount ) public virtual override returns (bool) { _transfer(sender, recipient, amount); _approve( sender, _msgSender(), _allowances[sender][_msgSender()].sub( amount, "ERC20: transfer amount exceeds allowance" ) ); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { _approve( _msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue) ); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { _approve( _msgSender(), spender, _allowances[_msgSender()][spender].sub( subtractedValue, "ERC20: decreased allowance below zero" ) ); return true; } /** * @dev Moves tokens `amount` from `sender` to `recipient`. * * This is internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `sender` cannot be the zero address. * - `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. */ function _transfer( address sender, address recipient, uint256 amount ) internal virtual { require(sender != address(0), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(sender, recipient, amount); _balances[sender] = _balances[sender].sub( amount, "ERC20: transfer amount exceeds balance" ); _balances[recipient] = _balances[recipient].add(amount); emit Transfer(sender, recipient, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements * * - `to` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply = _totalSupply.add(amount); _balances[account] = _balances[account].add(amount); emit Transfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); _balances[account] = _balances[account].sub( amount, "ERC20: burn amount exceeds balance" ); _totalSupply = _totalSupply.sub(amount); emit Transfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens. * * This is internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve( address owner, address spender, uint256 amount ) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Sets {decimals} to a value other than the default one of 18. * * WARNING: This function should only be called from the constructor. Most * applications that interact with token contracts will not expect * {decimals} to ever change, and may work incorrectly if it does. */ function _setupDecimals(uint8 decimals_) internal { _decimals = decimals_; } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be to transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer( address from, address to, uint256 amount ) internal virtual {} } contract StableCoin is ERC20, IStableCoin { address private constant UNISWAP_V2_ROUTER = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D; address private _doubleProxy; address[] private _allowedPairs; uint256[] private _rebalanceRewardMultiplier; uint256[] private _timeWindows; uint256[] private _mintables; uint256 private _lastRedeemBlock; constructor( string memory name, string memory symbol, address doubleProxy, address[] memory allowedPairs, uint256[] memory rebalanceRewardMultiplier, uint256[] memory timeWindows, uint256[] memory mintables ) { if (doubleProxy == address(0)) { return; } init( name, symbol, doubleProxy, allowedPairs, rebalanceRewardMultiplier, timeWindows, mintables ); } function init( string memory name, string memory symbol, address doubleProxy, address[] memory allowedPairs, uint256[] memory rebalanceRewardMultiplier, uint256[] memory timeWindows, uint256[] memory mintables ) public override { super.init(name, symbol); _doubleProxy = doubleProxy; _allowedPairs = allowedPairs; assert(rebalanceRewardMultiplier.length == 2); _rebalanceRewardMultiplier = rebalanceRewardMultiplier; assert(timeWindows.length == mintables.length); _timeWindows = timeWindows; _mintables = mintables; } function tierData() public override view returns (uint256[] memory, uint256[] memory) { return (_timeWindows, _mintables); } function availableToMint() public override view returns (uint256) { uint256 mintable = 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff; if(_timeWindows.length > 0 && block.number < _timeWindows[_timeWindows.length - 1]) { for (uint256 i = 0; i < _timeWindows.length; i++) { if (block.number < _timeWindows[i]) { mintable = _mintables[i]; break; } } } uint256 minted = totalSupply(); return minted >= mintable ? 0 : mintable - minted; } function doubleProxy() public override view returns (address) { return _doubleProxy; } function setDoubleProxy(address newDoubleProxy) public override _byCommunity { _doubleProxy = newDoubleProxy; } function allowedPairs() public override view returns (address[] memory) { return _allowedPairs; } function setAllowedPairs(address[] memory newAllowedPairs) public override _byCommunity { _allowedPairs = newAllowedPairs; } function rebalanceRewardMultiplier() public override view returns (uint256[] memory) { return _rebalanceRewardMultiplier; } function differences() public override view returns (uint256 credit, uint256 debt) { uint256 totalSupply = totalSupply(); uint256 effectiveAmount = 0; for (uint256 i = 0; i < _allowedPairs.length; i++) { (uint256 amount0, uint256 amount1) = _getPairAmount(i); effectiveAmount += (amount0 + amount1); } credit = effectiveAmount > totalSupply ? effectiveAmount - totalSupply : 0; debt = totalSupply > effectiveAmount ? totalSupply - effectiveAmount : 0; } function calculateRebalanceByDebtReward(uint256 burnt) public override view returns (uint256 reward) { if(burnt == 0) { return 0; } address[] memory path = new address[](2); path[0] = address(this); path[1] = IMVDProxy(IDoubleProxy(_doubleProxy).proxy()).getToken(); reward = IUniswapV2Router(UNISWAP_V2_ROUTER).getAmountsOut( burnt, path )[1]; reward = (reward * _rebalanceRewardMultiplier[0]) / _rebalanceRewardMultiplier[1]; } function fromTokenToStable(address tokenAddress, uint256 amount) public override view returns (uint256) { StableCoin token = StableCoin(tokenAddress); uint256 remainingDecimals = decimals() - token.decimals(); uint256 result = amount == 0 ? token.balanceOf(address(this)) : amount; if (remainingDecimals == 0) { return result; } return result * 10**remainingDecimals; } function mint( uint256 pairIndex, uint256 amount0, uint256 amount1, uint256 amount0Min, uint256 amount1Min ) public override _forAllowedPair(pairIndex) returns (uint256 minted) { require( IStateHolder( IMVDProxy(IDoubleProxy(_doubleProxy).proxy()) .getStateHolderAddress() ) .getBool( _toStateHolderKey( "stablecoin.authorized", _toString(address(this)) ) ), "Unauthorized action!" ); (address token0, address token1, ) = _getPairData(pairIndex); _transferTokensAndCheckAllowance(token0, amount0); _transferTokensAndCheckAllowance(token1, amount1); (uint256 firstAmount, uint256 secondAmount, ) = _createPoolToken( token0, token1, amount0, amount1, amount0Min, amount1Min ); minted = fromTokenToStable(token0, firstAmount) + fromTokenToStable(token1, secondAmount); require(minted <= availableToMint(), "Minting amount is greater than availability"); _mint(msg.sender, minted); } function burn( uint256 pairIndex, uint256 pairAmount, uint256 amount0, uint256 amount1 ) public override _forAllowedPair(pairIndex) returns (uint256 removed0, uint256 removed1) { (address token0, address token1, address pairAddress) = _getPairData(pairIndex); _checkAllowance(pairAddress, pairAmount); (removed0, removed1) = IUniswapV2Router(UNISWAP_V2_ROUTER) .removeLiquidity( token0, token1, pairAmount, amount0, amount1, msg.sender, block.timestamp + 1000 ); _burn( msg.sender, fromTokenToStable(token0, removed0) + fromTokenToStable(token1, removed1) ); } function rebalanceByCredit( uint256 pairIndex, uint256 pairAmount, uint256 amount0, uint256 amount1 ) public override _forAllowedPair(pairIndex) returns (uint256 redeemed) { require( block.number >= _lastRedeemBlock + IStateHolder( IMVDProxy(IDoubleProxy(_doubleProxy).proxy()) .getStateHolderAddress() ) .getUint256("stablecoin.rebalancebycredit.block.interval"), "Unauthorized action!" ); _lastRedeemBlock = block.number; (uint256 credit, ) = differences(); (address token0, address token1, address pairAddress) = _getPairData(pairIndex); _checkAllowance(pairAddress, pairAmount); (uint256 removed0, uint256 removed1) = IUniswapV2Router( UNISWAP_V2_ROUTER ) .removeLiquidity( token0, token1, pairAmount, amount0, amount1, IMVDProxy(IDoubleProxy(_doubleProxy).proxy()).getMVDWalletAddress(), block.timestamp + 1000 ); redeemed = fromTokenToStable(token0, removed0) + fromTokenToStable(token1, removed1); require(redeemed <= credit, "Cannot redeem given pair amount"); } function rebalanceByDebt(uint256 amount) public override returns(uint256 reward) { require(amount > 0, "You must insert a positive value"); (, uint256 debt) = differences(); require(amount <= debt, "Cannot Burn this amount"); _burn(msg.sender, amount); IMVDProxy(IDoubleProxy(_doubleProxy).proxy()).submit( "mintNewVotingTokensForStableCoin", abi.encode( address(0), 0, reward = calculateRebalanceByDebtReward(amount), msg.sender ) ); } modifier _byCommunity() { require( IMVDFunctionalitiesManager( IMVDProxy(IDoubleProxy(_doubleProxy).proxy()) .getMVDFunctionalitiesManagerAddress() ) .isAuthorizedFunctionality(msg.sender), "Unauthorized Action!" ); _; } modifier _forAllowedPair(uint256 pairIndex) { require( pairIndex >= 0 && pairIndex < _allowedPairs.length, "Unknown pair!" ); _; } function _getPairData(uint256 pairIndex) private view returns ( address token0, address token1, address pairAddress ) { IUniswapV2Pair pair = IUniswapV2Pair( pairAddress = _allowedPairs[pairIndex] ); token0 = pair.token0(); token1 = pair.token1(); } function _transferTokensAndCheckAllowance( address tokenAddress, uint256 value ) private { IERC20(tokenAddress).transferFrom(msg.sender, address(this), value); _checkAllowance(tokenAddress, value); } function _checkAllowance(address tokenAddress, uint256 value) private { IERC20 token = IERC20(tokenAddress); if (token.allowance(address(this), UNISWAP_V2_ROUTER) <= value) { token.approve( UNISWAP_V2_ROUTER, 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff ); } } function _createPoolToken( address firstToken, address secondToken, uint256 originalFirstAmount, uint256 originalSecondAmount, uint256 firstAmountMin, uint256 secondAmountMin ) private returns ( uint256 firstAmount, uint256 secondAmount, uint256 poolAmount ) { (firstAmount, secondAmount, poolAmount) = IUniswapV2Router( UNISWAP_V2_ROUTER ) .addLiquidity( firstToken, secondToken, originalFirstAmount, originalSecondAmount, firstAmountMin, secondAmountMin, address(this), block.timestamp + 1000 ); if (firstAmount < originalFirstAmount) { IERC20(firstToken).transfer( msg.sender, originalFirstAmount - firstAmount ); } if (secondAmount < originalSecondAmount) { IERC20(secondToken).transfer( msg.sender, originalSecondAmount - secondAmount ); } } function _getPairAmount(uint256 i) private view returns (uint256 amount0, uint256 amount1) { (address token0, address token1, address pairAddress) = _getPairData(i); IUniswapV2Pair pair = IUniswapV2Pair(pairAddress); uint256 pairAmount = pair.balanceOf(address(this)); uint256 pairTotalSupply = pair.totalSupply(); (amount0, amount1, ) = pair.getReserves(); amount0 = fromTokenToStable( token0, (pairAmount * amount0) / pairTotalSupply ); amount1 = fromTokenToStable( token1, (pairAmount * amount1) / pairTotalSupply ); } function _toStateHolderKey(string memory a, string memory b) private pure returns (string memory) { return _toLowerCase(string(abi.encodePacked(a, "_", b))); } function _toString(address _addr) private pure returns (string memory) { bytes32 value = bytes32(uint256(_addr)); bytes memory alphabet = "0123456789abcdef"; bytes memory str = new bytes(42); str[0] = "0"; str[1] = "x"; for (uint256 i = 0; i < 20; i++) { str[2 + i * 2] = alphabet[uint256(uint8(value[i + 12] >> 4))]; str[3 + i * 2] = alphabet[uint256(uint8(value[i + 12] & 0x0f))]; } return string(str); } function _toLowerCase(string memory str) private pure returns (string memory) { bytes memory bStr = bytes(str); for (uint256 i = 0; i < bStr.length; i++) { bStr[i] = bStr[i] >= 0x41 && bStr[i] <= 0x5A ? bytes1(uint8(bStr[i]) + 0x20) : bStr[i]; } return string(bStr); } }

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{"success": true, "error": null, "results": {"detectors": [{"check": "unchecked-transfer", "impact": "High", "confidence": "Medium"}, {"check": "incorrect-equality", "impact": "Medium", "confidence": "High"}, {"check": "unused-return", "impact": "Medium", "confidence": "Medium"}]}}

0x84c00c34e07eedf2095e48e2a17d97f2449bc867

pragma solidity 0.6.6; pragma experimental ABIEncoderV2; contract DSAuthEvents { event LogSetAuthority(address indexed authority); event LogSetOwner(address indexed owner); } contract DSAuth is DSAuthEvents { DSAuthority public authority; address public owner; constructor() public { owner = msg.sender; emit LogSetOwner(msg.sender); } function setOwner(address owner_) public auth { owner = owner_; emit LogSetOwner(owner); } function setAuthority(DSAuthority authority_) public auth { authority = authority_; emit LogSetAuthority(address(authority)); } modifier auth { require(isAuthorized(msg.sender, msg.sig)); _; } function isAuthorized(address src, bytes4 sig) internal view returns (bool) { if (src == address(this)) { return true; } else if (src == owner) { return true; } else if (authority == DSAuthority(0)) { return false; } else { return authority.canCall(src, address(this), sig); } } } abstract contract DSAuthority { function canCall(address src, address dst, bytes4 sig) public virtual view returns (bool); } abstract contract DSGuard { function canCall(address src_, address dst_, bytes4 sig) public view virtual returns (bool); function permit(bytes32 src, bytes32 dst, bytes32 sig) public virtual; function forbid(bytes32 src, bytes32 dst, bytes32 sig) public virtual; function permit(address src, address dst, bytes32 sig) public virtual; function forbid(address src, address dst, bytes32 sig) public virtual; } abstract contract DSGuardFactory { function newGuard() public virtual returns (DSGuard guard); } contract DSMath { function add(uint256 x, uint256 y) internal pure returns (uint256 z) { require((z = x + y) >= x); } function sub(uint256 x, uint256 y) internal pure returns (uint256 z) { require((z = x - y) <= x); } function mul(uint256 x, uint256 y) internal pure returns (uint256 z) { require(y == 0 || (z = x * y) / y == x); } function div(uint256 x, uint256 y) internal pure returns (uint256 z) { return x / y; } function min(uint256 x, uint256 y) internal pure returns (uint256 z) { return x <= y ? x : y; } function max(uint256 x, uint256 y) internal pure returns (uint256 z) { return x >= y ? x : y; } function imin(int256 x, int256 y) internal pure returns (int256 z) { return x <= y ? x : y; } function imax(int256 x, int256 y) internal pure returns (int256 z) { return x >= y ? x : y; } uint256 constant WAD = 10**18; uint256 constant RAY = 10**27; function wmul(uint256 x, uint256 y) internal pure returns (uint256 z) { z = add(mul(x, y), WAD / 2) / WAD; } function rmul(uint256 x, uint256 y) internal pure returns (uint256 z) { z = add(mul(x, y), RAY / 2) / RAY; } function wdiv(uint256 x, uint256 y) internal pure returns (uint256 z) { z = add(mul(x, WAD), y / 2) / y; } function rdiv(uint256 x, uint256 y) internal pure returns (uint256 z) { z = add(mul(x, RAY), y / 2) / y; } // This famous algorithm is called "exponentiation by squaring" // and calculates x^n with x as fixed-point and n as regular unsigned. // // It's O(log n), instead of O(n) for naive repeated multiplication. // // These facts are why it works: // // If n is even, then x^n = (x^2)^(n/2). // If n is odd, then x^n = x * x^(n-1), // and applying the equation for even x gives // x^n = x * (x^2)^((n-1) / 2). // // Also, EVM division is flooring and // floor[(n-1) / 2] = floor[n / 2]. // function rpow(uint256 x, uint256 n) internal pure returns (uint256 z) { z = n % 2 != 0 ? x : RAY; for (n /= 2; n != 0; n /= 2) { x = rmul(x, x); if (n % 2 != 0) { z = rmul(z, x); } } } } contract DSNote { event LogNote( bytes4 indexed sig, address indexed guy, bytes32 indexed foo, bytes32 indexed bar, uint256 wad, bytes fax ) anonymous; modifier note { bytes32 foo; bytes32 bar; assembly { foo := calldataload(4) bar := calldataload(36) } emit LogNote(msg.sig, msg.sender, foo, bar, msg.value, msg.data); _; } } abstract contract DSProxy is DSAuth, DSNote { DSProxyCache public cache; // global cache for contracts constructor(address _cacheAddr) public { require(setCache(_cacheAddr)); } // solhint-disable-next-line no-empty-blocks receive() external payable {} // use the proxy to execute calldata _data on contract _code // function execute(bytes memory _code, bytes memory _data) // public // payable // virtual // returns (address target, bytes32 response); function execute(address _target, bytes memory _data) public payable virtual returns (bytes32 response); //set new cache function setCache(address _cacheAddr) public virtual payable returns (bool); } contract DSProxyCache { mapping(bytes32 => address) cache; function read(bytes memory _code) public view returns (address) { bytes32 hash = keccak256(_code); return cache[hash]; } function write(bytes memory _code) public returns (address target) { assembly { target := create(0, add(_code, 0x20), mload(_code)) switch iszero(extcodesize(target)) case 1 { // throw if contract failed to deploy revert(0, 0) } } bytes32 hash = keccak256(_code); cache[hash] = target; } } abstract contract DSProxyFactoryInterface { function build(address owner) public virtual returns (DSProxy proxy); } contract Migrations { address public owner; uint public last_completed_migration; modifier restricted() { if (msg.sender == owner) _; } constructor() public { owner = msg.sender; } function setCompleted(uint completed) public restricted { last_completed_migration = completed; } function upgrade(address new_address) public restricted { Migrations upgraded = Migrations(new_address); upgraded.setCompleted(last_completed_migration); } } contract AaveHelper is DSMath { using SafeERC20 for ERC20; address payable public constant WALLET_ADDR = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; address public constant DISCOUNT_ADDR = 0x1b14E8D511c9A4395425314f849bD737BAF8208F; uint public constant MANUAL_SERVICE_FEE = 400; // 0.25% Fee uint public constant AUTOMATIC_SERVICE_FEE = 333; // 0.3% Fee address public constant BOT_REGISTRY_ADDRESS = 0x637726f8b08a7ABE3aE3aCaB01A80E2d8ddeF77B; address public constant ETH_ADDR = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant AAVE_LENDING_POOL_ADDRESSES = 0x24a42fD28C976A61Df5D00D0599C34c4f90748c8; uint public constant NINETY_NINE_PERCENT_WEI = 999900000000000000; uint16 public constant AAVE_REFERRAL_CODE = 64; /// @param _collateralAddress underlying token address /// @param _user users address function getMaxCollateral(address _collateralAddress, address _user) public view returns (uint256) { address lendingPoolAddressDataProvider = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolDataProvider(); address lendingPoolCoreAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); uint256 pow10 = 10 ** (18 - _getDecimals(_collateralAddress)); // fetch all needed data (,uint256 totalCollateralETH, uint256 totalBorrowsETH,,uint256 currentLTV,,,) = ILendingPool(lendingPoolAddressDataProvider).calculateUserGlobalData(_user); (,uint256 tokenLTV,,) = ILendingPool(lendingPoolCoreAddress).getReserveConfiguration(_collateralAddress); uint256 collateralPrice = IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_collateralAddress); uint256 userTokenBalance = ILendingPool(lendingPoolCoreAddress).getUserUnderlyingAssetBalance(_collateralAddress, _user); uint256 userTokenBalanceEth = wmul(userTokenBalance * pow10, collateralPrice); // if borrow is 0, return whole user balance if (totalBorrowsETH == 0) { return userTokenBalance; } uint256 maxCollateralEth = div(sub(mul(currentLTV, totalCollateralETH), mul(totalBorrowsETH, 100)), currentLTV); /// @dev final amount can't be higher than users token balance maxCollateralEth = maxCollateralEth > userTokenBalanceEth ? userTokenBalanceEth : maxCollateralEth; // might happen due to wmul precision if (maxCollateralEth >= totalCollateralETH) { return wdiv(totalCollateralETH, collateralPrice) / pow10; } // get sum of all other reserves multiplied with their liquidation thresholds by reversing formula uint256 a = sub(wmul(currentLTV, totalCollateralETH), wmul(tokenLTV, userTokenBalanceEth)); // add new collateral amount multiplied by its threshold, and then divide with new total collateral uint256 newLiquidationThreshold = wdiv(add(a, wmul(sub(userTokenBalanceEth, maxCollateralEth), tokenLTV)), sub(totalCollateralETH, maxCollateralEth)); // if new threshold is lower than first one, calculate new max collateral with newLiquidationThreshold if (newLiquidationThreshold < currentLTV) { maxCollateralEth = div(sub(mul(newLiquidationThreshold, totalCollateralETH), mul(totalBorrowsETH, 100)), newLiquidationThreshold); maxCollateralEth = maxCollateralEth > userTokenBalanceEth ? userTokenBalanceEth : maxCollateralEth; } return wmul(wdiv(maxCollateralEth, collateralPrice) / pow10, NINETY_NINE_PERCENT_WEI); } /// @param _borrowAddress underlying token address /// @param _user users address function getMaxBorrow(address _borrowAddress, address _user) public view returns (uint256) { address lendingPoolAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); (,,,,uint256 availableBorrowsETH,,,) = ILendingPool(lendingPoolAddress).getUserAccountData(_user); uint256 borrowPrice = IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_borrowAddress); return wmul(wdiv(availableBorrowsETH, borrowPrice) / (10 ** (18 - _getDecimals(_borrowAddress))), NINETY_NINE_PERCENT_WEI); } /// @notice Calculates the fee amount /// @param _amount Amount that is converted /// @param _user Actuall user addr not DSProxy /// @param _gasCost Ether amount of gas we are spending for tx /// @param _tokenAddr token addr. of token we are getting for the fee /// @return feeAmount The amount we took for the fee function getFee(uint _amount, address _user, uint _gasCost, address _tokenAddr) internal returns (uint feeAmount) { address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); uint fee = MANUAL_SERVICE_FEE; if (BotRegistry(BOT_REGISTRY_ADDRESS).botList(tx.origin)) { fee = AUTOMATIC_SERVICE_FEE; } if (Discount(DISCOUNT_ADDR).isCustomFeeSet(_user)) { fee = Discount(DISCOUNT_ADDR).getCustomServiceFee(_user); } feeAmount = (fee == 0) ? 0 : (_amount / fee); if (_gasCost != 0) { uint256 price = IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_tokenAddr); _gasCost = wmul(_gasCost, price) / (10 ** (18 - _getDecimals(_tokenAddr))); feeAmount = add(feeAmount, _gasCost); } // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } if (_tokenAddr == ETH_ADDR) { WALLET_ADDR.transfer(feeAmount); } else { ERC20(_tokenAddr).safeTransfer(WALLET_ADDR, feeAmount); } } /// @notice Calculates the gas cost for transaction /// @param _amount Amount that is converted /// @param _user Actuall user addr not DSProxy /// @param _gasCost Ether amount of gas we are spending for tx /// @param _tokenAddr token addr. of token we are getting for the fee /// @return gasCost The amount we took for the gas cost function getGasCost(uint _amount, address _user, uint _gasCost, address _tokenAddr) internal returns (uint gasCost) { address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); if (_gasCost != 0) { uint256 price = IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_tokenAddr); _gasCost = wmul(_gasCost, price); gasCost = _gasCost; } // fee can't go over 20% of the whole amount if (gasCost > (_amount / 5)) { gasCost = _amount / 5; } if (_tokenAddr == ETH_ADDR) { WALLET_ADDR.transfer(gasCost); } else { ERC20(_tokenAddr).safeTransfer(WALLET_ADDR, gasCost); } } /// @notice Returns the owner of the DSProxy that called the contract function getUserAddress() internal view returns (address) { DSProxy proxy = DSProxy(payable(address(this))); return proxy.owner(); } /// @notice Approves token contract to pull underlying tokens from the DSProxy /// @param _tokenAddr Token we are trying to approve /// @param _caller Address which will gain the approval function approveToken(address _tokenAddr, address _caller) internal { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeApprove(_caller, uint256(-1)); } } /// @notice Send specific amount from contract to specific user /// @param _token Token we are trying to send /// @param _user User that should receive funds /// @param _amount Amount that should be sent function sendContractBalance(address _token, address _user, uint _amount) public { if (_amount == 0) return; if (_token == ETH_ADDR) { payable(_user).transfer(_amount); } else { ERC20(_token).safeTransfer(_user, _amount); } } function sendFullContractBalance(address _token, address _user) public { if (_token == ETH_ADDR) { sendContractBalance(_token, _user, address(this).balance); } else { sendContractBalance(_token, _user, ERC20(_token).balanceOf(address(this))); } } function _getDecimals(address _token) internal view returns (uint256) { if (_token == ETH_ADDR) return 18; return ERC20(_token).decimals(); } } contract AaveSafetyRatio is AaveHelper { function getSafetyRatio(address _user) public view returns(uint256) { address lendingPoolAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); (,,uint256 totalBorrowsETH,,uint256 availableBorrowsETH,,,) = ILendingPool(lendingPoolAddress).getUserAccountData(_user); return wdiv(add(totalBorrowsETH, availableBorrowsETH), totalBorrowsETH); } } contract AdminAuth { using SafeERC20 for ERC20; address public owner; address public admin; modifier onlyOwner() { require(owner == msg.sender); _; } constructor() public { owner = msg.sender; } /// @notice Admin is set by owner first time, after that admin is super role and has permission to change owner /// @param _admin Address of multisig that becomes admin function setAdminByOwner(address _admin) public { require(msg.sender == owner); require(admin == address(0)); admin = _admin; } /// @notice Admin is able to set new admin /// @param _admin Address of multisig that becomes new admin function setAdminByAdmin(address _admin) public { require(msg.sender == admin); admin = _admin; } /// @notice Admin is able to change owner /// @param _owner Address of new owner function setOwnerByAdmin(address _owner) public { require(msg.sender == admin); owner = _owner; } /// @notice Destroy the contract function kill() public onlyOwner { selfdestruct(payable(owner)); } /// @notice withdraw stuck funds function withdrawStuckFunds(address _token, uint _amount) public onlyOwner { if (_token == 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE) { payable(owner).transfer(_amount); } else { ERC20(_token).safeTransfer(owner, _amount); } } } contract Auth is AdminAuth { bool public ALL_AUTHORIZED = false; mapping(address => bool) public authorized; modifier onlyAuthorized() { require(ALL_AUTHORIZED || authorized[msg.sender]); _; } constructor() public { authorized[msg.sender] = true; } function setAuthorized(address _user, bool _approved) public onlyOwner { authorized[_user] = _approved; } function setAllAuthorized(bool _authorized) public onlyOwner { ALL_AUTHORIZED = _authorized; } } contract ProxyPermission { address public constant FACTORY_ADDRESS = 0x5a15566417e6C1c9546523066500bDDBc53F88C7; /// @notice Called in the context of DSProxy to authorize an address /// @param _contractAddr Address which will be authorized function givePermission(address _contractAddr) public { address currAuthority = address(DSAuth(address(this)).authority()); DSGuard guard = DSGuard(currAuthority); if (currAuthority == address(0)) { guard = DSGuardFactory(FACTORY_ADDRESS).newGuard(); DSAuth(address(this)).setAuthority(DSAuthority(address(guard))); } guard.permit(_contractAddr, address(this), bytes4(keccak256("execute(address,bytes)"))); } /// @notice Called in the context of DSProxy to remove authority of an address /// @param _contractAddr Auth address which will be removed from authority list function removePermission(address _contractAddr) public { address currAuthority = address(DSAuth(address(this)).authority()); // if there is no authority, that means that contract doesn't have permission if (currAuthority == address(0)) { return; } DSGuard guard = DSGuard(currAuthority); guard.forbid(_contractAddr, address(this), bytes4(keccak256("execute(address,bytes)"))); } } contract CompoundMonitorProxy is AdminAuth { using SafeERC20 for ERC20; uint public CHANGE_PERIOD; address public monitor; address public newMonitor; address public lastMonitor; uint public changeRequestedTimestamp; mapping(address => bool) public allowed; event MonitorChangeInitiated(address oldMonitor, address newMonitor); event MonitorChangeCanceled(); event MonitorChangeFinished(address monitor); event MonitorChangeReverted(address monitor); // if someone who is allowed become malicious, owner can't be changed modifier onlyAllowed() { require(allowed[msg.sender] || msg.sender == owner); _; } modifier onlyMonitor() { require (msg.sender == monitor); _; } constructor(uint _changePeriod) public { CHANGE_PERIOD = _changePeriod * 1 days; } /// @notice Only monitor contract is able to call execute on users proxy /// @param _owner Address of cdp owner (users DSProxy address) /// @param _compoundSaverProxy Address of CompoundSaverProxy /// @param _data Data to send to CompoundSaverProxy function callExecute(address _owner, address _compoundSaverProxy, bytes memory _data) public payable onlyMonitor { // execute reverts if calling specific method fails DSProxyInterface(_owner).execute{value: msg.value}(_compoundSaverProxy, _data); // return if anything left if (address(this).balance > 0) { msg.sender.transfer(address(this).balance); } } /// @notice Allowed users are able to set Monitor contract without any waiting period first time /// @param _monitor Address of Monitor contract function setMonitor(address _monitor) public onlyAllowed { require(monitor == address(0)); monitor = _monitor; } /// @notice Allowed users are able to start procedure for changing monitor /// @dev after CHANGE_PERIOD needs to call confirmNewMonitor to actually make a change /// @param _newMonitor address of new monitor function changeMonitor(address _newMonitor) public onlyAllowed { require(changeRequestedTimestamp == 0); changeRequestedTimestamp = now; lastMonitor = monitor; newMonitor = _newMonitor; emit MonitorChangeInitiated(lastMonitor, newMonitor); } /// @notice At any point allowed users are able to cancel monitor change function cancelMonitorChange() public onlyAllowed { require(changeRequestedTimestamp > 0); changeRequestedTimestamp = 0; newMonitor = address(0); emit MonitorChangeCanceled(); } /// @notice Anyone is able to confirm new monitor after CHANGE_PERIOD if process is started function confirmNewMonitor() public onlyAllowed { require((changeRequestedTimestamp + CHANGE_PERIOD) < now); require(changeRequestedTimestamp != 0); require(newMonitor != address(0)); monitor = newMonitor; newMonitor = address(0); changeRequestedTimestamp = 0; emit MonitorChangeFinished(monitor); } /// @notice Its possible to revert monitor to last used monitor function revertMonitor() public onlyAllowed { require(lastMonitor != address(0)); monitor = lastMonitor; emit MonitorChangeReverted(monitor); } /// @notice Allowed users are able to add new allowed user /// @param _user Address of user that will be allowed function addAllowed(address _user) public onlyAllowed { allowed[_user] = true; } /// @notice Allowed users are able to remove allowed user /// @dev owner is always allowed even if someone tries to remove it from allowed mapping /// @param _user Address of allowed user function removeAllowed(address _user) public onlyAllowed { allowed[_user] = false; } function setChangePeriod(uint _periodInDays) public onlyAllowed { require(_periodInDays * 1 days > CHANGE_PERIOD); CHANGE_PERIOD = _periodInDays * 1 days; } /// @notice In case something is left in contract, owner is able to withdraw it /// @param _token address of token to withdraw balance function withdrawToken(address _token) public onlyOwner { uint balance = ERC20(_token).balanceOf(address(this)); ERC20(_token).safeTransfer(msg.sender, balance); } /// @notice In case something is left in contract, owner is able to withdraw it function withdrawEth() public onlyOwner { uint balance = address(this).balance; msg.sender.transfer(balance); } } contract CompoundSubscriptions is AdminAuth { struct CompoundHolder { address user; uint128 minRatio; uint128 maxRatio; uint128 optimalRatioBoost; uint128 optimalRatioRepay; bool boostEnabled; } struct SubPosition { uint arrPos; bool subscribed; } CompoundHolder[] public subscribers; mapping (address => SubPosition) public subscribersPos; uint public changeIndex; event Subscribed(address indexed user); event Unsubscribed(address indexed user); event Updated(address indexed user); event ParamUpdates(address indexed user, uint128, uint128, uint128, uint128, bool); /// @dev Called by the DSProxy contract which owns the Compound position /// @notice Adds the users Compound poistion in the list of subscriptions so it can be monitored /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalBoost Ratio amount which boost should target /// @param _optimalRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled function subscribe(uint128 _minRatio, uint128 _maxRatio, uint128 _optimalBoost, uint128 _optimalRepay, bool _boostEnabled) external { // if boost is not enabled, set max ratio to max uint uint128 localMaxRatio = _boostEnabled ? _maxRatio : uint128(-1); require(checkParams(_minRatio, localMaxRatio), "Must be correct params"); SubPosition storage subInfo = subscribersPos[msg.sender]; CompoundHolder memory subscription = CompoundHolder({ minRatio: _minRatio, maxRatio: localMaxRatio, optimalRatioBoost: _optimalBoost, optimalRatioRepay: _optimalRepay, user: msg.sender, boostEnabled: _boostEnabled }); changeIndex++; if (subInfo.subscribed) { subscribers[subInfo.arrPos] = subscription; emit Updated(msg.sender); emit ParamUpdates(msg.sender, _minRatio, localMaxRatio, _optimalBoost, _optimalRepay, _boostEnabled); } else { subscribers.push(subscription); subInfo.arrPos = subscribers.length - 1; subInfo.subscribed = true; emit Subscribed(msg.sender); } } /// @notice Called by the users DSProxy /// @dev Owner who subscribed cancels his subscription function unsubscribe() external { _unsubscribe(msg.sender); } /// @dev Checks limit if minRatio is bigger than max /// @param _minRatio Minimum ratio, bellow which repay can be triggered /// @param _maxRatio Maximum ratio, over which boost can be triggered /// @return Returns bool if the params are correct function checkParams(uint128 _minRatio, uint128 _maxRatio) internal pure returns (bool) { if (_minRatio > _maxRatio) { return false; } return true; } /// @dev Internal method to remove a subscriber from the list /// @param _user The actual address that owns the Compound position function _unsubscribe(address _user) internal { require(subscribers.length > 0, "Must have subscribers in the list"); SubPosition storage subInfo = subscribersPos[_user]; require(subInfo.subscribed, "Must first be subscribed"); address lastOwner = subscribers[subscribers.length - 1].user; SubPosition storage subInfo2 = subscribersPos[lastOwner]; subInfo2.arrPos = subInfo.arrPos; subscribers[subInfo.arrPos] = subscribers[subscribers.length - 1]; subscribers.pop(); // remove last element and reduce arr length changeIndex++; subInfo.subscribed = false; subInfo.arrPos = 0; emit Unsubscribed(msg.sender); } /// @dev Checks if the user is subscribed /// @param _user The actual address that owns the Compound position /// @return If the user is subscribed function isSubscribed(address _user) public view returns (bool) { SubPosition storage subInfo = subscribersPos[_user]; return subInfo.subscribed; } /// @dev Returns subscribtion information about a user /// @param _user The actual address that owns the Compound position /// @return Subscription information about the user if exists function getHolder(address _user) public view returns (CompoundHolder memory) { SubPosition storage subInfo = subscribersPos[_user]; return subscribers[subInfo.arrPos]; } /// @notice Helper method to return all the subscribed CDPs /// @return List of all subscribers function getSubscribers() public view returns (CompoundHolder[] memory) { return subscribers; } /// @notice Helper method for the frontend, returns all the subscribed CDPs paginated /// @param _page What page of subscribers you want /// @param _perPage Number of entries per page /// @return List of all subscribers for that page function getSubscribersByPage(uint _page, uint _perPage) public view returns (CompoundHolder[] memory) { CompoundHolder[] memory holders = new CompoundHolder[](_perPage); uint start = _page * _perPage; uint end = start + _perPage; end = (end > holders.length) ? holders.length : end; uint count = 0; for (uint i = start; i < end; i++) { holders[count] = subscribers[i]; count++; } return holders; } ////////////// ADMIN METHODS /////////////////// /// @notice Admin function to unsubscribe a CDP /// @param _user The actual address that owns the Compound position function unsubscribeByAdmin(address _user) public onlyOwner { SubPosition storage subInfo = subscribersPos[_user]; if (subInfo.subscribed) { _unsubscribe(_user); } } } contract CompoundSubscriptionsProxy is ProxyPermission { address public constant COMPOUND_SUBSCRIPTION_ADDRESS = 0x52015EFFD577E08f498a0CCc11905925D58D6207; address public constant COMPOUND_MONITOR_PROXY = 0xB1cF8DE8e791E4Ed1Bd86c03E2fc1f14389Cb10a; /// @notice Calls subscription contract and creates a DSGuard if non existent /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalRatioBoost Ratio amount which boost should target /// @param _optimalRatioRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled function subscribe( uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled ) public { givePermission(COMPOUND_MONITOR_PROXY); ICompoundSubscription(COMPOUND_SUBSCRIPTION_ADDRESS).subscribe( _minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled); } /// @notice Calls subscription contract and updated existing parameters /// @dev If subscription is non existent this will create one /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalRatioBoost Ratio amount which boost should target /// @param _optimalRatioRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled function update( uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled ) public { ICompoundSubscription(COMPOUND_SUBSCRIPTION_ADDRESS).subscribe(_minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled); } /// @notice Calls the subscription contract to unsubscribe the caller function unsubscribe() public { removePermission(COMPOUND_MONITOR_PROXY); ICompoundSubscription(COMPOUND_SUBSCRIPTION_ADDRESS).unsubscribe(); } } contract CompoundCreateTaker is ProxyPermission { using SafeERC20 for ERC20; address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); // solhint-disable-next-line const-name-snakecase DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); struct CreateInfo { address cCollAddress; address cBorrowAddress; uint depositAmount; } /// @notice Main function which will take a FL and open a leverage position /// @dev Call through DSProxy, if _exchangeData.destAddr is a token approve DSProxy /// @param _createInfo [cCollAddress, cBorrowAddress, depositAmount] /// @param _exchangeData Exchange data struct function openLeveragedLoan( CreateInfo memory _createInfo, SaverExchangeCore.ExchangeData memory _exchangeData, address payable _compReceiver ) public payable { uint loanAmount = _exchangeData.srcAmount; // Pull tokens from user if (_exchangeData.destAddr != ETH_ADDRESS) { ERC20(_exchangeData.destAddr).safeTransferFrom(msg.sender, address(this), _createInfo.depositAmount); } else { require(msg.value >= _createInfo.depositAmount, "Must send correct amount of eth"); } // Send tokens to FL receiver sendDeposit(_compReceiver, _exchangeData.destAddr); // Pack the struct data (uint[4] memory numData, address[6] memory cAddresses, bytes memory callData) = _packData(_createInfo, _exchangeData); bytes memory paramsData = abi.encode(numData, cAddresses, callData, address(this)); givePermission(_compReceiver); lendingPool.flashLoan(_compReceiver, _exchangeData.srcAddr, loanAmount, paramsData); removePermission(_compReceiver); logger.Log(address(this), msg.sender, "CompoundLeveragedLoan", abi.encode(_exchangeData.srcAddr, _exchangeData.destAddr, _exchangeData.srcAmount, _exchangeData.destAmount)); } function sendDeposit(address payable _compoundReceiver, address _token) internal { if (_token != ETH_ADDRESS) { ERC20(_token).safeTransfer(_compoundReceiver, ERC20(_token).balanceOf(address(this))); } _compoundReceiver.transfer(address(this).balance); } function _packData( CreateInfo memory _createInfo, SaverExchangeCore.ExchangeData memory exchangeData ) internal pure returns (uint[4] memory numData, address[6] memory cAddresses, bytes memory callData) { numData = [ exchangeData.srcAmount, exchangeData.destAmount, exchangeData.minPrice, exchangeData.price0x ]; cAddresses = [ _createInfo.cCollAddress, _createInfo.cBorrowAddress, exchangeData.srcAddr, exchangeData.destAddr, exchangeData.exchangeAddr, exchangeData.wrapper ]; callData = exchangeData.callData; } } contract CarefulMath { /** * @dev Possible error codes that we can return */ enum MathError { NO_ERROR, DIVISION_BY_ZERO, INTEGER_OVERFLOW, INTEGER_UNDERFLOW } /** * @dev Multiplies two numbers, returns an error on overflow. */ function mulUInt(uint a, uint b) internal pure returns (MathError, uint) { if (a == 0) { return (MathError.NO_ERROR, 0); } uint c = a * b; if (c / a != b) { return (MathError.INTEGER_OVERFLOW, 0); } else { return (MathError.NO_ERROR, c); } } /** * @dev Integer division of two numbers, truncating the quotient. */ function divUInt(uint a, uint b) internal pure returns (MathError, uint) { if (b == 0) { return (MathError.DIVISION_BY_ZERO, 0); } return (MathError.NO_ERROR, a / b); } /** * @dev Subtracts two numbers, returns an error on overflow (i.e. if subtrahend is greater than minuend). */ function subUInt(uint a, uint b) internal pure returns (MathError, uint) { if (b <= a) { return (MathError.NO_ERROR, a - b); } else { return (MathError.INTEGER_UNDERFLOW, 0); } } /** * @dev Adds two numbers, returns an error on overflow. */ function addUInt(uint a, uint b) internal pure returns (MathError, uint) { uint c = a + b; if (c >= a) { return (MathError.NO_ERROR, c); } else { return (MathError.INTEGER_OVERFLOW, 0); } } /** * @dev add a and b and then subtract c */ function addThenSubUInt(uint a, uint b, uint c) internal pure returns (MathError, uint) { (MathError err0, uint sum) = addUInt(a, b); if (err0 != MathError.NO_ERROR) { return (err0, 0); } return subUInt(sum, c); } } contract Exponential is CarefulMath { uint constant expScale = 1e18; uint constant halfExpScale = expScale/2; uint constant mantissaOne = expScale; struct Exp { uint mantissa; } /** * @dev Creates an exponential from numerator and denominator values. * Note: Returns an error if (`num` * 10e18) > MAX_INT, * or if `denom` is zero. */ function getExp(uint num, uint denom) pure internal returns (MathError, Exp memory) { (MathError err0, uint scaledNumerator) = mulUInt(num, expScale); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } (MathError err1, uint rational) = divUInt(scaledNumerator, denom); if (err1 != MathError.NO_ERROR) { return (err1, Exp({mantissa: 0})); } return (MathError.NO_ERROR, Exp({mantissa: rational})); } /** * @dev Adds two exponentials, returning a new exponential. */ function addExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) { (MathError error, uint result) = addUInt(a.mantissa, b.mantissa); return (error, Exp({mantissa: result})); } /** * @dev Subtracts two exponentials, returning a new exponential. */ function subExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) { (MathError error, uint result) = subUInt(a.mantissa, b.mantissa); return (error, Exp({mantissa: result})); } /** * @dev Multiply an Exp by a scalar, returning a new Exp. */ function mulScalar(Exp memory a, uint scalar) pure internal returns (MathError, Exp memory) { (MathError err0, uint scaledMantissa) = mulUInt(a.mantissa, scalar); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } return (MathError.NO_ERROR, Exp({mantissa: scaledMantissa})); } /** * @dev Multiply an Exp by a scalar, then truncate to return an unsigned integer. */ function mulScalarTruncate(Exp memory a, uint scalar) pure internal returns (MathError, uint) { (MathError err, Exp memory product) = mulScalar(a, scalar); if (err != MathError.NO_ERROR) { return (err, 0); } return (MathError.NO_ERROR, truncate(product)); } /** * @dev Multiply an Exp by a scalar, truncate, then add an to an unsigned integer, returning an unsigned integer. */ function mulScalarTruncateAddUInt(Exp memory a, uint scalar, uint addend) pure internal returns (MathError, uint) { (MathError err, Exp memory product) = mulScalar(a, scalar); if (err != MathError.NO_ERROR) { return (err, 0); } return addUInt(truncate(product), addend); } /** * @dev Divide an Exp by a scalar, returning a new Exp. */ function divScalar(Exp memory a, uint scalar) pure internal returns (MathError, Exp memory) { (MathError err0, uint descaledMantissa) = divUInt(a.mantissa, scalar); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } return (MathError.NO_ERROR, Exp({mantissa: descaledMantissa})); } /** * @dev Divide a scalar by an Exp, returning a new Exp. */ function divScalarByExp(uint scalar, Exp memory divisor) pure internal returns (MathError, Exp memory) { /* We are doing this as: getExp(mulUInt(expScale, scalar), divisor.mantissa) How it works: Exp = a / b; Scalar = s; `s / (a / b)` = `b * s / a` and since for an Exp `a = mantissa, b = expScale` */ (MathError err0, uint numerator) = mulUInt(expScale, scalar); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } return getExp(numerator, divisor.mantissa); } /** * @dev Divide a scalar by an Exp, then truncate to return an unsigned integer. */ function divScalarByExpTruncate(uint scalar, Exp memory divisor) pure internal returns (MathError, uint) { (MathError err, Exp memory fraction) = divScalarByExp(scalar, divisor); if (err != MathError.NO_ERROR) { return (err, 0); } return (MathError.NO_ERROR, truncate(fraction)); } /** * @dev Multiplies two exponentials, returning a new exponential. */ function mulExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) { (MathError err0, uint doubleScaledProduct) = mulUInt(a.mantissa, b.mantissa); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } // We add half the scale before dividing so that we get rounding instead of truncation. // See "Listing 6" and text above it at https://accu.org/index.php/journals/1717 // Without this change, a result like 6.6...e-19 will be truncated to 0 instead of being rounded to 1e-18. (MathError err1, uint doubleScaledProductWithHalfScale) = addUInt(halfExpScale, doubleScaledProduct); if (err1 != MathError.NO_ERROR) { return (err1, Exp({mantissa: 0})); } (MathError err2, uint product) = divUInt(doubleScaledProductWithHalfScale, expScale); // The only error `div` can return is MathError.DIVISION_BY_ZERO but we control `expScale` and it is not zero. assert(err2 == MathError.NO_ERROR); return (MathError.NO_ERROR, Exp({mantissa: product})); } /** * @dev Multiplies two exponentials given their mantissas, returning a new exponential. */ function mulExp(uint a, uint b) pure internal returns (MathError, Exp memory) { return mulExp(Exp({mantissa: a}), Exp({mantissa: b})); } /** * @dev Multiplies three exponentials, returning a new exponential. */ function mulExp3(Exp memory a, Exp memory b, Exp memory c) pure internal returns (MathError, Exp memory) { (MathError err, Exp memory ab) = mulExp(a, b); if (err != MathError.NO_ERROR) { return (err, ab); } return mulExp(ab, c); } /** * @dev Divides two exponentials, returning a new exponential. * (a/scale) / (b/scale) = (a/scale) * (scale/b) = a/b, * which we can scale as an Exp by calling getExp(a.mantissa, b.mantissa) */ function divExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) { return getExp(a.mantissa, b.mantissa); } /** * @dev Truncates the given exp to a whole number value. * For example, truncate(Exp{mantissa: 15 * expScale}) = 15 */ function truncate(Exp memory exp) pure internal returns (uint) { // Note: We are not using careful math here as we're performing a division that cannot fail return exp.mantissa / expScale; } /** * @dev Checks if first Exp is less than second Exp. */ function lessThanExp(Exp memory left, Exp memory right) pure internal returns (bool) { return left.mantissa < right.mantissa; } /** * @dev Checks if left Exp <= right Exp. */ function lessThanOrEqualExp(Exp memory left, Exp memory right) pure internal returns (bool) { return left.mantissa <= right.mantissa; } /** * @dev Checks if left Exp > right Exp. */ function greaterThanExp(Exp memory left, Exp memory right) pure internal returns (bool) { return left.mantissa > right.mantissa; } /** * @dev returns true if Exp is exactly zero */ function isZeroExp(Exp memory value) pure internal returns (bool) { return value.mantissa == 0; } } contract CompoundBorrowProxy { using SafeERC20 for ERC20; address public constant ETH_ADDR = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant COMPTROLLER_ADDR = 0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B; function borrow(address _cCollToken, address _cBorrowToken, address _borrowToken, uint _amount) public { address[] memory markets = new address[](2); markets[0] = _cCollToken; markets[1] = _cBorrowToken; ComptrollerInterface(COMPTROLLER_ADDR).enterMarkets(markets); require(CTokenInterface(_cBorrowToken).borrow(_amount) == 0); // withdraw funds to msg.sender if (_borrowToken != ETH_ADDR) { ERC20(_borrowToken).safeTransfer(msg.sender, ERC20(_borrowToken).balanceOf(address(this))); } else { msg.sender.transfer(address(this).balance); } } } contract CreamSafetyRatio is Exponential, DSMath { // solhint-disable-next-line const-name-snakecase ComptrollerInterface public constant comp = ComptrollerInterface(0x3d5BC3c8d13dcB8bF317092d84783c2697AE9258); /// @notice Calcualted the ratio of debt / adjusted collateral /// @param _user Address of the user function getSafetyRatio(address _user) public view returns (uint) { // For each asset the account is in address[] memory assets = comp.getAssetsIn(_user); address oracleAddr = comp.oracle(); uint sumCollateral = 0; uint sumBorrow = 0; for (uint i = 0; i < assets.length; i++) { address asset = assets[i]; (, uint cTokenBalance, uint borrowBalance, uint exchangeRateMantissa) = CTokenInterface(asset).getAccountSnapshot(_user); Exp memory oraclePrice; if (cTokenBalance != 0 || borrowBalance != 0) { oraclePrice = Exp({mantissa: CompoundOracleInterface(oracleAddr).getUnderlyingPrice(asset)}); } // Sum up collateral in Eth if (cTokenBalance != 0) { (, uint collFactorMantissa) = comp.markets(address(asset)); Exp memory collateralFactor = Exp({mantissa: collFactorMantissa}); Exp memory exchangeRate = Exp({mantissa: exchangeRateMantissa}); (, Exp memory tokensToEther) = mulExp3(collateralFactor, exchangeRate, oraclePrice); (, sumCollateral) = mulScalarTruncateAddUInt(tokensToEther, cTokenBalance, sumCollateral); } // Sum up debt in Eth if (borrowBalance != 0) { (, sumBorrow) = mulScalarTruncateAddUInt(oraclePrice, borrowBalance, sumBorrow); } } if (sumBorrow == 0) return uint(-1); uint borrowPowerUsed = (sumBorrow * 10**18) / sumCollateral; return wdiv(1e18, borrowPowerUsed); } } contract CreamSaverHelper is DSMath, Exponential { using SafeERC20 for ERC20; address payable public constant WALLET_ADDR = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; address public constant DISCOUNT_ADDR = 0x1b14E8D511c9A4395425314f849bD737BAF8208F; uint public constant MANUAL_SERVICE_FEE = 400; // 0.25% Fee uint public constant AUTOMATIC_SERVICE_FEE = 333; // 0.3% Fee address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant CETH_ADDRESS = 0xD06527D5e56A3495252A528C4987003b712860eE; address public constant COMPTROLLER = 0x3d5BC3c8d13dcB8bF317092d84783c2697AE9258; address public constant BOT_REGISTRY_ADDRESS = 0x637726f8b08a7ABE3aE3aCaB01A80E2d8ddeF77B; /// @notice Helper method to payback the cream debt /// @dev If amount is bigger it will repay the whole debt and send the extra to the _user /// @param _amount Amount of tokens we want to repay /// @param _cBorrowToken Ctoken address we are repaying /// @param _borrowToken Token address we are repaying /// @param _user Owner of the cream position we are paying back function paybackDebt(uint _amount, address _cBorrowToken, address _borrowToken, address payable _user) internal { uint wholeDebt = CTokenInterface(_cBorrowToken).borrowBalanceCurrent(address(this)); if (_amount > wholeDebt) { if (_borrowToken == ETH_ADDRESS) { _user.transfer((_amount - wholeDebt)); } else { ERC20(_borrowToken).safeTransfer(_user, (_amount - wholeDebt)); } _amount = wholeDebt; } approveCToken(_borrowToken, _cBorrowToken); if (_borrowToken == ETH_ADDRESS) { CEtherInterface(_cBorrowToken).repayBorrow{value: _amount}(); } else { require(CTokenInterface(_cBorrowToken).repayBorrow(_amount) == 0); } } /// @notice Calculates the fee amount /// @param _amount Amount that is converted /// @param _user Actuall user addr not DSProxy /// @param _gasCost Ether amount of gas we are spending for tx /// @param _cTokenAddr CToken addr. of token we are getting for the fee /// @return feeAmount The amount we took for the fee function getFee(uint _amount, address _user, uint _gasCost, address _cTokenAddr) internal returns (uint feeAmount) { uint fee = MANUAL_SERVICE_FEE; if (BotRegistry(BOT_REGISTRY_ADDRESS).botList(tx.origin)) { fee = AUTOMATIC_SERVICE_FEE; } address tokenAddr = getUnderlyingAddr(_cTokenAddr); if (Discount(DISCOUNT_ADDR).isCustomFeeSet(_user)) { fee = Discount(DISCOUNT_ADDR).getCustomServiceFee(_user); } feeAmount = (fee == 0) ? 0 : (_amount / fee); if (_gasCost != 0) { address oracle = ComptrollerInterface(COMPTROLLER).oracle(); uint ethTokenPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(_cTokenAddr); _gasCost = wdiv(_gasCost, ethTokenPrice); feeAmount = add(feeAmount, _gasCost); } // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } if (tokenAddr == ETH_ADDRESS) { WALLET_ADDR.transfer(feeAmount); } else { ERC20(tokenAddr).safeTransfer(WALLET_ADDR, feeAmount); } } /// @notice Calculates the gas cost of transaction and send it to wallet /// @param _amount Amount that is converted /// @param _gasCost Ether amount of gas we are spending for tx /// @param _cTokenAddr CToken addr. of token we are getting for the fee /// @return feeAmount The amount we took for the fee function getGasCost(uint _amount, uint _gasCost, address _cTokenAddr) internal returns (uint feeAmount) { address tokenAddr = getUnderlyingAddr(_cTokenAddr); if (_gasCost != 0) { address oracle = ComptrollerInterface(COMPTROLLER).oracle(); uint ethTokenPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(_cTokenAddr); feeAmount = wdiv(_gasCost, ethTokenPrice); } // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } if (tokenAddr == ETH_ADDRESS) { WALLET_ADDR.transfer(feeAmount); } else { ERC20(tokenAddr).safeTransfer(WALLET_ADDR, feeAmount); } } /// @notice Enters the market for the collatera and borrow tokens /// @param _cTokenAddrColl Collateral address we are entering the market in /// @param _cTokenAddrBorrow Borrow address we are entering the market in function enterMarket(address _cTokenAddrColl, address _cTokenAddrBorrow) internal { address[] memory markets = new address[](2); markets[0] = _cTokenAddrColl; markets[1] = _cTokenAddrBorrow; ComptrollerInterface(COMPTROLLER).enterMarkets(markets); } /// @notice Approves CToken contract to pull underlying tokens from the DSProxy /// @param _tokenAddr Token we are trying to approve /// @param _cTokenAddr Address which will gain the approval function approveCToken(address _tokenAddr, address _cTokenAddr) internal { if (_tokenAddr != ETH_ADDRESS) { ERC20(_tokenAddr).safeApprove(_cTokenAddr, 0); ERC20(_tokenAddr).safeApprove(_cTokenAddr, uint(-1)); } } /// @notice Returns the underlying address of the cToken asset /// @param _cTokenAddress cToken address /// @return Token address of the cToken specified function getUnderlyingAddr(address _cTokenAddress) internal returns (address) { if (_cTokenAddress == CETH_ADDRESS) { return ETH_ADDRESS; } else { return CTokenInterface(_cTokenAddress).underlying(); } } /// @notice Returns the owner of the DSProxy that called the contract function getUserAddress() internal view returns (address) { DSProxy proxy = DSProxy(uint160(address(this))); return proxy.owner(); } /// @notice Returns the maximum amount of collateral available to withdraw /// @dev Due to rounding errors the result is - 1% wei from the exact amount /// @param _cCollAddress Collateral we are getting the max value of /// @param _account Users account /// @return Returns the max. collateral amount in that token function getMaxCollateral(address _cCollAddress, address _account) public returns (uint) { (, uint liquidityInEth, ) = ComptrollerInterface(COMPTROLLER).getAccountLiquidity(_account); uint usersBalance = CTokenInterface(_cCollAddress).balanceOfUnderlying(_account); address oracle = ComptrollerInterface(COMPTROLLER).oracle(); if (liquidityInEth == 0) return usersBalance; CTokenInterface(_cCollAddress).accrueInterest(); if (_cCollAddress == CETH_ADDRESS) { if (liquidityInEth > usersBalance) return usersBalance; return sub(liquidityInEth, (liquidityInEth / 100)); } uint ethPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(_cCollAddress); uint liquidityInToken = wdiv(liquidityInEth, ethPrice); if (liquidityInToken > usersBalance) return usersBalance; return sub(liquidityInToken, (liquidityInToken / 100)); // cut off 1% due to rounding issues } /// @notice Returns the maximum amount of borrow amount available /// @dev Due to rounding errors the result is - 1% wei from the exact amount /// @param _cBorrowAddress Borrow token we are getting the max value of /// @param _account Users account /// @return Returns the max. borrow amount in that token function getMaxBorrow(address _cBorrowAddress, address _account) public returns (uint) { (, uint liquidityInEth, ) = ComptrollerInterface(COMPTROLLER).getAccountLiquidity(_account); address oracle = ComptrollerInterface(COMPTROLLER).oracle(); CTokenInterface(_cBorrowAddress).accrueInterest(); if (_cBorrowAddress == CETH_ADDRESS) return sub(liquidityInEth, (liquidityInEth / 100)); uint ethPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(_cBorrowAddress); uint liquidityInToken = wdiv(liquidityInEth, ethPrice); return sub(liquidityInToken, (liquidityInToken / 100)); // cut off 1% due to rounding issues } } contract AllowanceProxy is AdminAuth { using SafeERC20 for ERC20; address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; // TODO: Real saver exchange address SaverExchange saverExchange = SaverExchange(0x235abFAd01eb1BDa28Ef94087FBAA63E18074926); function callSell(SaverExchangeCore.ExchangeData memory exData) public payable { pullAndSendTokens(exData.srcAddr, exData.srcAmount); saverExchange.sell{value: msg.value}(exData, msg.sender); } function callBuy(SaverExchangeCore.ExchangeData memory exData) public payable { pullAndSendTokens(exData.srcAddr, exData.srcAmount); saverExchange.buy{value: msg.value}(exData, msg.sender); } function pullAndSendTokens(address _tokenAddr, uint _amount) internal { if (_tokenAddr == KYBER_ETH_ADDRESS) { require(msg.value >= _amount, "msg.value smaller than amount"); } else { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(saverExchange), _amount); } } function ownerChangeExchange(address payable _newExchange) public onlyOwner { saverExchange = SaverExchange(_newExchange); } } contract Prices is DSMath { address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; enum ActionType { SELL, BUY } /// @notice Returns the best estimated price from 2 exchanges /// @param _amount Amount of source tokens you want to exchange /// @param _srcToken Address of the source token /// @param _destToken Address of the destination token /// @param _type Type of action SELL|BUY /// @param _wrappers Array of wrapper addresses to compare /// @return (address, uint) The address of the best exchange and the exchange price function getBestPrice( uint256 _amount, address _srcToken, address _destToken, ActionType _type, address[] memory _wrappers ) public returns (address, uint256) { uint256[] memory rates = new uint256[](_wrappers.length); for (uint i=0; i<_wrappers.length; i++) { rates[i] = getExpectedRate(_wrappers[i], _srcToken, _destToken, _amount, _type); } if (_type == ActionType.SELL) { return getBiggestRate(_wrappers, rates); } else { return getSmallestRate(_wrappers, rates); } } /// @notice Return the expected rate from the exchange wrapper /// @dev In case of Oasis/Uniswap handles the different precision tokens /// @param _wrapper Address of exchange wrapper /// @param _srcToken From token /// @param _destToken To token /// @param _amount Amount to be exchanged /// @param _type Type of action SELL|BUY function getExpectedRate( address _wrapper, address _srcToken, address _destToken, uint256 _amount, ActionType _type ) public returns (uint256) { bool success; bytes memory result; if (_type == ActionType.SELL) { (success, result) = _wrapper.call(abi.encodeWithSignature( "getSellRate(address,address,uint256)", _srcToken, _destToken, _amount )); } else { (success, result) = _wrapper.call(abi.encodeWithSignature( "getBuyRate(address,address,uint256)", _srcToken, _destToken, _amount )); } if (success) { return sliceUint(result, 0); } return 0; } /// @notice Finds the biggest rate between exchanges, needed for sell rate /// @param _wrappers Array of wrappers to compare /// @param _rates Array of rates to compare function getBiggestRate( address[] memory _wrappers, uint256[] memory _rates ) internal pure returns (address, uint) { uint256 maxIndex = 0; // starting from 0 in case there is only one rate in array for (uint256 i=0; i<_rates.length; i++) { if (_rates[i] > _rates[maxIndex]) { maxIndex = i; } } return (_wrappers[maxIndex], _rates[maxIndex]); } /// @notice Finds the smallest rate between exchanges, needed for buy rate /// @param _wrappers Array of wrappers to compare /// @param _rates Array of rates to compare function getSmallestRate( address[] memory _wrappers, uint256[] memory _rates ) internal pure returns (address, uint) { uint256 minIndex = 0; // starting from 0 in case there is only one rate in array for (uint256 i=0; i<_rates.length; i++) { if ((_rates[i] < _rates[minIndex] && _rates[i] > 0) || _rates[minIndex] == 0) { minIndex = i; } } return (_wrappers[minIndex], _rates[minIndex]); } function getDecimals(address _token) internal view returns (uint256) { if (_token == KYBER_ETH_ADDRESS) return 18; return ERC20(_token).decimals(); } function sliceUint(bytes memory bs, uint256 start) internal pure returns (uint256) { require(bs.length >= start + 32, "slicing out of range"); uint256 x; assembly { x := mload(add(bs, add(0x20, start))) } return x; } } contract SaverExchangeHelper { using SafeERC20 for ERC20; address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant WETH_ADDRESS = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address payable public constant WALLET_ID = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; address public constant DISCOUNT_ADDRESS = 0x1b14E8D511c9A4395425314f849bD737BAF8208F; address public constant SAVER_EXCHANGE_REGISTRY = 0x25dd3F51e0C3c3Ff164DDC02A8E4D65Bb9cBB12D; address public constant ERC20_PROXY_0X = 0x95E6F48254609A6ee006F7D493c8e5fB97094ceF; address public constant ZRX_ALLOWLIST_ADDR = 0x4BA1f38427b33B8ab7Bb0490200dAE1F1C36823F; function getDecimals(address _token) internal view returns (uint256) { if (_token == KYBER_ETH_ADDRESS) return 18; return ERC20(_token).decimals(); } function getBalance(address _tokenAddr) internal view returns (uint balance) { if (_tokenAddr == KYBER_ETH_ADDRESS) { balance = address(this).balance; } else { balance = ERC20(_tokenAddr).balanceOf(address(this)); } } function approve0xProxy(address _tokenAddr, uint _amount) internal { if (_tokenAddr != KYBER_ETH_ADDRESS) { ERC20(_tokenAddr).safeApprove(address(ERC20_PROXY_0X), _amount); } } function sendLeftover(address _srcAddr, address _destAddr, address payable _to) internal { // send back any leftover ether or tokens if (address(this).balance > 0) { _to.transfer(address(this).balance); } if (getBalance(_srcAddr) > 0) { ERC20(_srcAddr).safeTransfer(_to, getBalance(_srcAddr)); } if (getBalance(_destAddr) > 0) { ERC20(_destAddr).safeTransfer(_to, getBalance(_destAddr)); } } function sliceUint(bytes memory bs, uint256 start) internal pure returns (uint256) { require(bs.length >= start + 32, "slicing out of range"); uint256 x; assembly { x := mload(add(bs, add(0x20, start))) } return x; } } contract SaverExchangeRegistry is AdminAuth { mapping(address => bool) private wrappers; constructor() public { wrappers[0x880A845A85F843a5c67DB2061623c6Fc3bB4c511] = true; wrappers[0x4c9B55f2083629A1F7aDa257ae984E03096eCD25] = true; wrappers[0x42A9237b872368E1bec4Ca8D26A928D7d39d338C] = true; } function addWrapper(address _wrapper) public onlyOwner { wrappers[_wrapper] = true; } function removeWrapper(address _wrapper) public onlyOwner { wrappers[_wrapper] = false; } function isWrapper(address _wrapper) public view returns(bool) { return wrappers[_wrapper]; } } abstract contract CEtherInterface { function mint() external virtual payable; function repayBorrow() external virtual payable; } abstract contract Cat { struct Ilk { address flip; // Liquidator uint256 chop; // Liquidation Penalty [ray] uint256 lump; // Liquidation Quantity [wad] } mapping (bytes32 => Ilk) public ilks; } abstract contract CompoundOracleInterface { function getUnderlyingPrice(address cToken) external view virtual returns (uint); } abstract contract ComptrollerInterface { function enterMarkets(address[] calldata cTokens) external virtual returns (uint256[] memory); function exitMarket(address cToken) external virtual returns (uint256); function getAssetsIn(address account) external virtual view returns (address[] memory); function markets(address account) public virtual view returns (bool, uint256); function getAccountLiquidity(address account) external virtual view returns (uint256, uint256, uint256); function claimComp(address holder) virtual public; function oracle() public virtual view returns (address); } abstract contract DSProxyInterface { /// Truffle wont compile if this isn't commented // function execute(bytes memory _code, bytes memory _data) // public virtual // payable // returns (address, bytes32); function execute(address _target, bytes memory _data) public virtual payable returns (bytes32); function setCache(address _cacheAddr) public virtual payable returns (bool); function owner() public virtual returns (address); } abstract contract GemLike { function approve(address, uint) public virtual; function transfer(address, uint) public virtual; function transferFrom(address, address, uint) public virtual; function deposit() public virtual payable; function withdraw(uint) public virtual; } abstract contract ManagerLike { function cdpCan(address, uint, address) public virtual view returns (uint); function ilks(uint) public virtual view returns (bytes32); function owns(uint) public virtual view returns (address); function urns(uint) public virtual view returns (address); function vat() public virtual view returns (address); function open(bytes32) public virtual returns (uint); function give(uint, address) public virtual; function cdpAllow(uint, address, uint) public virtual; function urnAllow(address, uint) public virtual; function frob(uint, int, int) public virtual; function frob(uint, address, int, int) public virtual; function flux(uint, address, uint) public virtual; function move(uint, address, uint) public virtual; function exit(address, uint, address, uint) public virtual; function quit(uint, address) public virtual; function enter(address, uint) public virtual; function shift(uint, uint) public virtual; } abstract contract VatLike { function can(address, address) public virtual view returns (uint); function ilks(bytes32) public virtual view returns (uint, uint, uint, uint, uint); function dai(address) public virtual view returns (uint); function urns(bytes32, address) public virtual view returns (uint, uint); function frob(bytes32, address, address, address, int, int) public virtual; function hope(address) public virtual; function move(address, address, uint) public virtual; } abstract contract GemJoinLike { function dec() public virtual returns (uint); function gem() public virtual returns (GemLike); function join(address, uint) public virtual payable; function exit(address, uint) public virtual; } abstract contract GNTJoinLike { function bags(address) public virtual view returns (address); function make(address) public virtual returns (address); } abstract contract DaiJoinLike { function vat() public virtual returns (VatLike); function dai() public virtual returns (GemLike); function join(address, uint) public virtual payable; function exit(address, uint) public virtual; } abstract contract HopeLike { function hope(address) public virtual; function nope(address) public virtual; } abstract contract EndLike { function fix(bytes32) public virtual view returns (uint); function cash(bytes32, uint) public virtual; function free(bytes32) public virtual; function pack(uint) public virtual; function skim(bytes32, address) public virtual; } abstract contract JugLike { function drip(bytes32) public virtual; } abstract contract PotLike { function chi() public virtual view returns (uint); function pie(address) public virtual view returns (uint); function drip() public virtual; function join(uint) public virtual; function exit(uint) public virtual; } abstract contract ProxyRegistryLike { function proxies(address) public virtual view returns (address); function build(address) public virtual returns (address); } abstract contract ProxyLike { function owner() public virtual view returns (address); } abstract contract DssProxyActions { function daiJoin_join(address apt, address urn, uint wad) public virtual; function transfer(address gem, address dst, uint wad) public virtual; function ethJoin_join(address apt, address urn) public virtual payable; function gemJoin_join(address apt, address urn, uint wad, bool transferFrom) public virtual payable; function hope(address obj, address usr) public virtual; function nope(address obj, address usr) public virtual; function open(address manager, bytes32 ilk, address usr) public virtual returns (uint cdp); function give(address manager, uint cdp, address usr) public virtual; function giveToProxy(address proxyRegistry, address manager, uint cdp, address dst) public virtual; function cdpAllow(address manager, uint cdp, address usr, uint ok) public virtual; function urnAllow(address manager, address usr, uint ok) public virtual; function flux(address manager, uint cdp, address dst, uint wad) public virtual; function move(address manager, uint cdp, address dst, uint rad) public virtual; function frob(address manager, uint cdp, int dink, int dart) public virtual; function frob(address manager, uint cdp, address dst, int dink, int dart) public virtual; function quit(address manager, uint cdp, address dst) public virtual; function enter(address manager, address src, uint cdp) public virtual; function shift(address manager, uint cdpSrc, uint cdpOrg) public virtual; function makeGemBag(address gemJoin) public virtual returns (address bag); function lockETH(address manager, address ethJoin, uint cdp) public virtual payable; function safeLockETH(address manager, address ethJoin, uint cdp, address owner) public virtual payable; function lockGem(address manager, address gemJoin, uint cdp, uint wad, bool transferFrom) public virtual; function safeLockGem(address manager, address gemJoin, uint cdp, uint wad, bool transferFrom, address owner) public virtual; function freeETH(address manager, address ethJoin, uint cdp, uint wad) public virtual; function freeGem(address manager, address gemJoin, uint cdp, uint wad) public virtual; function draw(address manager, address jug, address daiJoin, uint cdp, uint wad) public virtual; function wipe(address manager, address daiJoin, uint cdp, uint wad) public virtual; function safeWipe(address manager, address daiJoin, uint cdp, uint wad, address owner) public virtual; function wipeAll(address manager, address daiJoin, uint cdp) public virtual; function safeWipeAll(address manager, address daiJoin, uint cdp, address owner) public virtual; function lockETHAndDraw(address manager, address jug, address ethJoin, address daiJoin, uint cdp, uint wadD) public virtual payable; function openLockETHAndDraw(address manager, address jug, address ethJoin, address daiJoin, bytes32 ilk, uint wadD) public virtual payable returns (uint cdp); function lockGemAndDraw(address manager, address jug, address gemJoin, address daiJoin, uint cdp, uint wadC, uint wadD, bool transferFrom) public virtual; function openLockGemAndDraw(address manager, address jug, address gemJoin, address daiJoin, bytes32 ilk, uint wadC, uint wadD, bool transferFrom) public virtual returns (uint cdp); function openLockGNTAndDraw(address manager, address jug, address gntJoin, address daiJoin, bytes32 ilk, uint wadC, uint wadD) public virtual returns (address bag, uint cdp); function wipeAndFreeETH(address manager, address ethJoin, address daiJoin, uint cdp, uint wadC, uint wadD) public virtual; function wipeAllAndFreeETH(address manager, address ethJoin, address daiJoin, uint cdp, uint wadC) public virtual; function wipeAndFreeGem(address manager, address gemJoin, address daiJoin, uint cdp, uint wadC, uint wadD) public virtual; function wipeAllAndFreeGem(address manager, address gemJoin, address daiJoin, uint cdp, uint wadC) public virtual; } abstract contract DaiJoin { function vat() public virtual returns (Vat); function dai() public virtual returns (Gem); function join(address, uint) public virtual payable; function exit(address, uint) public virtual; } abstract contract DssProxyActionsDsr { function join(address daiJoin, address pot, uint wad) virtual public; function exit(address daiJoin, address pot, uint wad) virtual public; function exitAll(address daiJoin, address pot) virtual public; } interface ERC20 { function totalSupply() external view returns (uint256 supply); function balanceOf(address _owner) external view returns (uint256 balance); function transfer(address _to, uint256 _value) external returns (bool success); function transferFrom(address _from, address _to, uint256 _value) external returns (bool success); function approve(address _spender, uint256 _value) external returns (bool success); function allowance(address _owner, address _spender) external view returns (uint256 remaining); function decimals() external view returns (uint256 digits); event Approval(address indexed _owner, address indexed _spender, uint256 _value); } interface ExchangeInterface { function swapEtherToToken(uint256 _ethAmount, address _tokenAddress, uint256 _maxAmount) external payable returns (uint256, uint256); function swapTokenToEther(address _tokenAddress, uint256 _amount, uint256 _maxAmount) external returns (uint256); function swapTokenToToken(address _src, address _dest, uint256 _amount) external payable returns (uint256); function getExpectedRate(address src, address dest, uint256 srcQty) external view returns (uint256 expectedRate); } interface ExchangeInterfaceV2 { function sell(address _srcAddr, address _destAddr, uint _srcAmount) external payable returns (uint); function buy(address _srcAddr, address _destAddr, uint _destAmount) external payable returns(uint); function getSellRate(address _srcAddr, address _destAddr, uint _srcAmount) external view returns (uint); function getBuyRate(address _srcAddr, address _destAddr, uint _srcAmount) external view returns (uint); } abstract contract Faucet { function gulp(address) public virtual; } abstract contract Flipper { function bids(uint _bidId) public virtual returns (uint256, uint256, address, uint48, uint48, address, address, uint256); function tend(uint id, uint lot, uint bid) virtual external; function dent(uint id, uint lot, uint bid) virtual external; function deal(uint id) virtual external; } abstract contract GasTokenInterface is ERC20 { function free(uint256 value) public virtual returns (bool success); function freeUpTo(uint256 value) public virtual returns (uint256 freed); function freeFrom(address from, uint256 value) public virtual returns (bool success); function freeFromUpTo(address from, uint256 value) public virtual returns (uint256 freed); } abstract contract Gem { function dec() virtual public returns (uint); function gem() virtual public returns (Gem); function join(address, uint) virtual public payable; function exit(address, uint) virtual public; function approve(address, uint) virtual public; function transfer(address, uint) virtual public returns (bool); function transferFrom(address, address, uint) virtual public returns (bool); function deposit() virtual public payable; function withdraw(uint) virtual public; function allowance(address, address) virtual public returns (uint); } abstract contract GetCdps { function getCdpsAsc(address manager, address guy) external view virtual returns (uint[] memory ids, address[] memory urns, bytes32[] memory ilks); function getCdpsDesc(address manager, address guy) external view virtual returns (uint[] memory ids, address[] memory urns, bytes32[] memory ilks); } abstract contract IAToken { function redeem(uint256 _amount) external virtual; } abstract contract IAaveSubscription { function subscribe(uint128 _minRatio, uint128 _maxRatio, uint128 _optimalBoost, uint128 _optimalRepay, bool _boostEnabled) public virtual; function unsubscribe() public virtual; } abstract contract ICompoundSubscription { function subscribe(uint128 _minRatio, uint128 _maxRatio, uint128 _optimalBoost, uint128 _optimalRepay, bool _boostEnabled) public virtual; function unsubscribe() public virtual; } abstract contract ILendingPool { function flashLoan( address payable _receiver, address _reserve, uint _amount, bytes calldata _params) external virtual; function deposit(address _reserve, uint256 _amount, uint16 _referralCode) external virtual payable; function setUserUseReserveAsCollateral(address _reserve, bool _useAsCollateral) external virtual; function borrow(address _reserve, uint256 _amount, uint256 _interestRateMode, uint16 _referralCode) external virtual; function repay( address _reserve, uint256 _amount, address payable _onBehalfOf) external virtual payable; function swapBorrowRateMode(address _reserve) external virtual; function getReserves() external virtual view returns(address[] memory); /// @param _reserve underlying token address function getReserveData(address _reserve) external virtual view returns ( uint256 totalLiquidity, // reserve total liquidity uint256 availableLiquidity, // reserve available liquidity for borrowing uint256 totalBorrowsStable, // total amount of outstanding borrows at Stable rate uint256 totalBorrowsVariable, // total amount of outstanding borrows at Variable rate uint256 liquidityRate, // current deposit APY of the reserve for depositors, in Ray units. uint256 variableBorrowRate, // current variable rate APY of the reserve pool, in Ray units. uint256 stableBorrowRate, // current stable rate APY of the reserve pool, in Ray units. uint256 averageStableBorrowRate, // current average stable borrow rate uint256 utilizationRate, // expressed as total borrows/total liquidity. uint256 liquidityIndex, // cumulative liquidity index uint256 variableBorrowIndex, // cumulative variable borrow index address aTokenAddress, // aTokens contract address for the specific _reserve uint40 lastUpdateTimestamp // timestamp of the last update of reserve data ); /// @param _user users address function getUserAccountData(address _user) external virtual view returns ( uint256 totalLiquidityETH, // user aggregated deposits across all the reserves. In Wei uint256 totalCollateralETH, // user aggregated collateral across all the reserves. In Wei uint256 totalBorrowsETH, // user aggregated outstanding borrows across all the reserves. In Wei uint256 totalFeesETH, // user aggregated current outstanding fees in ETH. In Wei uint256 availableBorrowsETH, // user available amount to borrow in ETH uint256 currentLiquidationThreshold, // user current average liquidation threshold across all the collaterals deposited uint256 ltv, // user average Loan-to-Value between all the collaterals uint256 healthFactor // user current Health Factor ); /// @param _reserve underlying token address /// @param _user users address function getUserReserveData(address _reserve, address _user) external virtual view returns ( uint256 currentATokenBalance, // user current reserve aToken balance uint256 currentBorrowBalance, // user current reserve outstanding borrow balance uint256 principalBorrowBalance, // user balance of borrowed asset uint256 borrowRateMode, // user borrow rate mode either Stable or Variable uint256 borrowRate, // user current borrow rate APY uint256 liquidityRate, // user current earn rate on _reserve uint256 originationFee, // user outstanding loan origination fee uint256 variableBorrowIndex, // user variable cumulative index uint256 lastUpdateTimestamp, // Timestamp of the last data update bool usageAsCollateralEnabled // Whether the user's current reserve is enabled as a collateral ); function getReserveConfigurationData(address _reserve) external virtual view returns ( uint256 ltv, uint256 liquidationThreshold, uint256 liquidationBonus, address rateStrategyAddress, bool usageAsCollateralEnabled, bool borrowingEnabled, bool stableBorrowRateEnabled, bool isActive ); // ------------------ LendingPoolCoreData ------------------------ function getReserveATokenAddress(address _reserve) public virtual view returns (address); function getReserveConfiguration(address _reserve) external virtual view returns (uint256, uint256, uint256, bool); function getUserUnderlyingAssetBalance(address _reserve, address _user) public virtual view returns (uint256); function getReserveCurrentLiquidityRate(address _reserve) public virtual view returns (uint256); function getReserveCurrentVariableBorrowRate(address _reserve) public virtual view returns (uint256); function getReserveTotalLiquidity(address _reserve) public virtual view returns (uint256); function getReserveAvailableLiquidity(address _reserve) public virtual view returns (uint256); function getReserveTotalBorrowsVariable(address _reserve) public virtual view returns (uint256); // ---------------- LendingPoolDataProvider --------------------- function calculateUserGlobalData(address _user) public virtual view returns ( uint256 totalLiquidityBalanceETH, uint256 totalCollateralBalanceETH, uint256 totalBorrowBalanceETH, uint256 totalFeesETH, uint256 currentLtv, uint256 currentLiquidationThreshold, uint256 healthFactor, bool healthFactorBelowThreshold ); } abstract contract ILendingPoolAddressesProvider { function getLendingPool() public virtual view returns (address); function getLendingPoolCore() public virtual view returns (address payable); function getLendingPoolConfigurator() public virtual view returns (address); function getLendingPoolDataProvider() public virtual view returns (address); function getLendingPoolParametersProvider() public virtual view returns (address); function getTokenDistributor() public virtual view returns (address); function getFeeProvider() public virtual view returns (address); function getLendingPoolLiquidationManager() public virtual view returns (address); function getLendingPoolManager() public virtual view returns (address); function getPriceOracle() public virtual view returns (address); function getLendingRateOracle() public virtual view returns (address); } abstract contract ILoanShifter { function getLoanAmount(uint, address) public view virtual returns(uint); function getUnderlyingAsset(address _addr) public view virtual returns (address); } abstract contract IPriceOracleGetterAave { function getAssetPrice(address _asset) external virtual view returns (uint256); function getAssetsPrices(address[] calldata _assets) external virtual view returns(uint256[] memory); function getSourceOfAsset(address _asset) external virtual view returns(address); function getFallbackOracle() external virtual view returns(address); } abstract contract ITokenInterface is ERC20 { function assetBalanceOf(address _owner) public virtual view returns (uint256); function mint(address receiver, uint256 depositAmount) external virtual returns (uint256 mintAmount); function burn(address receiver, uint256 burnAmount) external virtual returns (uint256 loanAmountPaid); function tokenPrice() public virtual view returns (uint256 price); } abstract contract Join { bytes32 public ilk; function dec() virtual public view returns (uint); function gem() virtual public view returns (Gem); function join(address, uint) virtual public payable; function exit(address, uint) virtual public; } abstract contract Jug { struct Ilk { uint256 duty; uint256 rho; } mapping (bytes32 => Ilk) public ilks; function drip(bytes32) public virtual returns (uint); } abstract contract KyberNetworkProxyInterface { function maxGasPrice() external virtual view returns (uint256); function getUserCapInWei(address user) external virtual view returns (uint256); function getUserCapInTokenWei(address user, ERC20 token) external virtual view returns (uint256); function enabled() external virtual view returns (bool); function info(bytes32 id) external virtual view returns (uint256); function getExpectedRate(ERC20 src, ERC20 dest, uint256 srcQty) public virtual view returns (uint256 expectedRate, uint256 slippageRate); function tradeWithHint( ERC20 src, uint256 srcAmount, ERC20 dest, address destAddress, uint256 maxDestAmount, uint256 minConversionRate, address walletId, bytes memory hint ) public virtual payable returns (uint256); function trade( ERC20 src, uint256 srcAmount, ERC20 dest, address destAddress, uint256 maxDestAmount, uint256 minConversionRate, address walletId ) public virtual payable returns (uint256); function swapEtherToToken(ERC20 token, uint256 minConversionRate) external virtual payable returns (uint256); function swapTokenToEther(ERC20 token, uint256 tokenQty, uint256 minRate) external virtual payable returns (uint256); function swapTokenToToken(ERC20 src, uint256 srcAmount, ERC20 dest, uint256 minConversionRate) public virtual returns (uint256); } abstract contract Manager { function last(address) virtual public returns (uint); function cdpCan(address, uint, address) virtual public view returns (uint); function ilks(uint) virtual public view returns (bytes32); function owns(uint) virtual public view returns (address); function urns(uint) virtual public view returns (address); function vat() virtual public view returns (address); function open(bytes32, address) virtual public returns (uint); function give(uint, address) virtual public; function cdpAllow(uint, address, uint) virtual public; function urnAllow(address, uint) virtual public; function frob(uint, int, int) virtual public; function flux(uint, address, uint) virtual public; function move(uint, address, uint) virtual public; function exit(address, uint, address, uint) virtual public; function quit(uint, address) virtual public; function enter(address, uint) virtual public; function shift(uint, uint) virtual public; } abstract contract OasisInterface { function getBuyAmount(address tokenToBuy, address tokenToPay, uint256 amountToPay) external virtual view returns (uint256 amountBought); function getPayAmount(address tokenToPay, address tokenToBuy, uint256 amountToBuy) public virtual view returns (uint256 amountPaid); function sellAllAmount(address pay_gem, uint256 pay_amt, address buy_gem, uint256 min_fill_amount) public virtual returns (uint256 fill_amt); function buyAllAmount(address buy_gem, uint256 buy_amt, address pay_gem, uint256 max_fill_amount) public virtual returns (uint256 fill_amt); } abstract contract Osm { mapping(address => uint256) public bud; function peep() external view virtual returns (bytes32, bool); } abstract contract OsmMom { mapping (bytes32 => address) public osms; } abstract contract OtcInterface { function buyAllAmount(address, uint256, address, uint256) public virtual returns (uint256); function getPayAmount(address, address, uint256) public virtual view returns (uint256); function getBuyAmount(address, address, uint256) public virtual view returns (uint256); } abstract contract PipInterface { function read() public virtual returns (bytes32); } abstract contract ProxyRegistryInterface { function proxies(address _owner) public virtual view returns (address); function build(address) public virtual returns (address); } abstract contract SaverExchangeInterface { function getBestPrice( uint256 _amount, address _srcToken, address _destToken, uint256 _exchangeType ) public view virtual returns (address, uint256); } abstract contract Spotter { struct Ilk { PipInterface pip; uint256 mat; } mapping (bytes32 => Ilk) public ilks; uint256 public par; } abstract contract TokenInterface { function allowance(address, address) public virtual returns (uint256); function balanceOf(address) public virtual returns (uint256); function approve(address, uint256) public virtual; function transfer(address, uint256) public virtual returns (bool); function transferFrom(address, address, uint256) public virtual returns (bool); function deposit() public virtual payable; function withdraw(uint256) public virtual; } abstract contract UniswapExchangeInterface { function getEthToTokenInputPrice(uint256 eth_sold) external virtual view returns (uint256 tokens_bought); function getEthToTokenOutputPrice(uint256 tokens_bought) external virtual view returns (uint256 eth_sold); function getTokenToEthInputPrice(uint256 tokens_sold) external virtual view returns (uint256 eth_bought); function getTokenToEthOutputPrice(uint256 eth_bought) external virtual view returns (uint256 tokens_sold); function tokenToEthTransferInput( uint256 tokens_sold, uint256 min_eth, uint256 deadline, address recipient ) external virtual returns (uint256 eth_bought); function ethToTokenTransferInput(uint256 min_tokens, uint256 deadline, address recipient) external virtual payable returns (uint256 tokens_bought); function tokenToTokenTransferInput( uint256 tokens_sold, uint256 min_tokens_bought, uint256 min_eth_bought, uint256 deadline, address recipient, address token_addr ) external virtual returns (uint256 tokens_bought); function ethToTokenTransferOutput( uint256 tokens_bought, uint256 deadline, address recipient ) external virtual payable returns (uint256 eth_sold); function tokenToEthTransferOutput( uint256 eth_bought, uint256 max_tokens, uint256 deadline, address recipient ) external virtual returns (uint256 tokens_sold); function tokenToTokenTransferOutput( uint256 tokens_bought, uint256 max_tokens_sold, uint256 max_eth_sold, uint256 deadline, address recipient, address token_addr ) external virtual returns (uint256 tokens_sold); } abstract contract UniswapFactoryInterface { function getExchange(address token) external view virtual returns (address exchange); } abstract contract UniswapRouterInterface { function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline) external virtual returns (uint[] memory amounts); function swapExactTokensForTokens( uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline ) external virtual returns (uint[] memory amounts); function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline) external virtual returns (uint[] memory amounts); function swapTokensForExactTokens( uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline ) external virtual returns (uint[] memory amounts); function getAmountsOut(uint amountIn, address[] memory path) public virtual view returns (uint[] memory amounts); function getAmountsIn(uint amountOut, address[] memory path) public virtual view returns (uint[] memory amounts); } abstract contract Vat { struct Urn { uint256 ink; // Locked Collateral [wad] uint256 art; // Normalised Debt [wad] } struct Ilk { uint256 Art; // Total Normalised Debt [wad] uint256 rate; // Accumulated Rates [ray] uint256 spot; // Price with Safety Margin [ray] uint256 line; // Debt Ceiling [rad] uint256 dust; // Urn Debt Floor [rad] } mapping (bytes32 => mapping (address => Urn )) public urns; mapping (bytes32 => Ilk) public ilks; mapping (bytes32 => mapping (address => uint)) public gem; // [wad] function can(address, address) virtual public view returns (uint); function dai(address) virtual public view returns (uint); function frob(bytes32, address, address, address, int, int) virtual public; function hope(address) virtual public; function move(address, address, uint) virtual public; function fork(bytes32, address, address, int, int) virtual public; } contract DefisaverLogger { event LogEvent( address indexed contractAddress, address indexed caller, string indexed logName, bytes data ); // solhint-disable-next-line func-name-mixedcase function Log(address _contract, address _caller, string memory _logName, bytes memory _data) public { emit LogEvent(_contract, _caller, _logName, _data); } } contract MCDMonitorProxyV2 is AdminAuth { uint public CHANGE_PERIOD; address public monitor; address public newMonitor; address public lastMonitor; uint public changeRequestedTimestamp; mapping(address => bool) public allowed; event MonitorChangeInitiated(address oldMonitor, address newMonitor); event MonitorChangeCanceled(); event MonitorChangeFinished(address monitor); event MonitorChangeReverted(address monitor); // if someone who is allowed become malicious, owner can't be changed modifier onlyAllowed() { require(allowed[msg.sender] || msg.sender == owner); _; } modifier onlyMonitor() { require (msg.sender == monitor); _; } constructor(uint _changePeriod) public { CHANGE_PERIOD = _changePeriod * 1 days; } /// @notice Only monitor contract is able to call execute on users proxy /// @param _owner Address of cdp owner (users DSProxy address) /// @param _saverProxy Address of MCDSaverProxy /// @param _data Data to send to MCDSaverProxy function callExecute(address _owner, address _saverProxy, bytes memory _data) public payable onlyMonitor { // execute reverts if calling specific method fails DSProxyInterface(_owner).execute{value: msg.value}(_saverProxy, _data); // return if anything left if (address(this).balance > 0) { msg.sender.transfer(address(this).balance); } } /// @notice Allowed users are able to set Monitor contract without any waiting period first time /// @param _monitor Address of Monitor contract function setMonitor(address _monitor) public onlyAllowed { require(monitor == address(0)); monitor = _monitor; } /// @notice Allowed users are able to start procedure for changing monitor /// @dev after CHANGE_PERIOD needs to call confirmNewMonitor to actually make a change /// @param _newMonitor address of new monitor function changeMonitor(address _newMonitor) public onlyAllowed { require(changeRequestedTimestamp == 0); changeRequestedTimestamp = now; lastMonitor = monitor; newMonitor = _newMonitor; emit MonitorChangeInitiated(lastMonitor, newMonitor); } /// @notice At any point allowed users are able to cancel monitor change function cancelMonitorChange() public onlyAllowed { require(changeRequestedTimestamp > 0); changeRequestedTimestamp = 0; newMonitor = address(0); emit MonitorChangeCanceled(); } /// @notice Anyone is able to confirm new monitor after CHANGE_PERIOD if process is started function confirmNewMonitor() public onlyAllowed { require((changeRequestedTimestamp + CHANGE_PERIOD) < now); require(changeRequestedTimestamp != 0); require(newMonitor != address(0)); monitor = newMonitor; newMonitor = address(0); changeRequestedTimestamp = 0; emit MonitorChangeFinished(monitor); } /// @notice Its possible to revert monitor to last used monitor function revertMonitor() public onlyAllowed { require(lastMonitor != address(0)); monitor = lastMonitor; emit MonitorChangeReverted(monitor); } /// @notice Allowed users are able to add new allowed user /// @param _user Address of user that will be allowed function addAllowed(address _user) public onlyAllowed { allowed[_user] = true; } /// @notice Allowed users are able to remove allowed user /// @dev owner is always allowed even if someone tries to remove it from allowed mapping /// @param _user Address of allowed user function removeAllowed(address _user) public onlyAllowed { allowed[_user] = false; } function setChangePeriod(uint _periodInDays) public onlyAllowed { require(_periodInDays * 1 days > CHANGE_PERIOD); CHANGE_PERIOD = _periodInDays * 1 days; } } contract MCDPriceVerifier is AdminAuth { OsmMom public osmMom = OsmMom(0x76416A4d5190d071bfed309861527431304aA14f); Manager public manager = Manager(0x5ef30b9986345249bc32d8928B7ee64DE9435E39); mapping(address => bool) public authorized; function verifyVaultNextPrice(uint _nextPrice, uint _cdpId) public view returns(bool) { require(authorized[msg.sender]); bytes32 ilk = manager.ilks(_cdpId); return verifyNextPrice(_nextPrice, ilk); } function verifyNextPrice(uint _nextPrice, bytes32 _ilk) public view returns(bool) { require(authorized[msg.sender]); address osmAddress = osmMom.osms(_ilk); uint whitelisted = Osm(osmAddress).bud(address(this)); // If contracts doesn't have access return true if (whitelisted != 1) return true; (bytes32 price, bool has) = Osm(osmAddress).peep(); return has ? uint(price) == _nextPrice : false; } function setAuthorized(address _address, bool _allowed) public onlyOwner { authorized[_address] = _allowed; } } abstract contract StaticV2 { enum Method { Boost, Repay } struct CdpHolder { uint128 minRatio; uint128 maxRatio; uint128 optimalRatioBoost; uint128 optimalRatioRepay; address owner; uint cdpId; bool boostEnabled; bool nextPriceEnabled; } struct SubPosition { uint arrPos; bool subscribed; } } contract SubscriptionsInterfaceV2 { function subscribe(uint _cdpId, uint128 _minRatio, uint128 _maxRatio, uint128 _optimalBoost, uint128 _optimalRepay, bool _boostEnabled, bool _nextPriceEnabled) external {} function unsubscribe(uint _cdpId) external {} } contract SubscriptionsProxyV2 { address public constant MONITOR_PROXY_ADDRESS = 0x7456f4218874eAe1aF8B83a64848A1B89fEB7d7C; address public constant OLD_SUBSCRIPTION = 0x83152CAA0d344a2Fd428769529e2d490A88f4393; address public constant FACTORY_ADDRESS = 0x5a15566417e6C1c9546523066500bDDBc53F88C7; function migrate(uint _cdpId, uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled, bool _nextPriceEnabled, address _subscriptions) public { SubscriptionsInterfaceV2(OLD_SUBSCRIPTION).unsubscribe(_cdpId); subscribe(_cdpId, _minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled, _nextPriceEnabled, _subscriptions); } function subscribe(uint _cdpId, uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled, bool _nextPriceEnabled, address _subscriptions) public { address currAuthority = address(DSAuth(address(this)).authority()); DSGuard guard = DSGuard(currAuthority); if (currAuthority == address(0)) { guard = DSGuardFactory(FACTORY_ADDRESS).newGuard(); DSAuth(address(this)).setAuthority(DSAuthority(address(guard))); } guard.permit(MONITOR_PROXY_ADDRESS, address(this), bytes4(keccak256("execute(address,bytes)"))); SubscriptionsInterfaceV2(_subscriptions).subscribe(_cdpId, _minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled, _nextPriceEnabled); } function update(uint _cdpId, uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled, bool _nextPriceEnabled, address _subscriptions) public { SubscriptionsInterfaceV2(_subscriptions).subscribe(_cdpId, _minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled, _nextPriceEnabled); } function unsubscribe(uint _cdpId, address _subscriptions) public { SubscriptionsInterfaceV2(_subscriptions).unsubscribe(_cdpId); } } contract SubscriptionsV2 is AdminAuth, StaticV2 { bytes32 internal constant ETH_ILK = 0x4554482d41000000000000000000000000000000000000000000000000000000; bytes32 internal constant BAT_ILK = 0x4241542d41000000000000000000000000000000000000000000000000000000; address public constant MANAGER_ADDRESS = 0x5ef30b9986345249bc32d8928B7ee64DE9435E39; address public constant VAT_ADDRESS = 0x35D1b3F3D7966A1DFe207aa4514C12a259A0492B; address public constant SPOTTER_ADDRESS = 0x65C79fcB50Ca1594B025960e539eD7A9a6D434A3; CdpHolder[] public subscribers; mapping (uint => SubPosition) public subscribersPos; mapping (bytes32 => uint) public minLimits; uint public changeIndex; Manager public manager = Manager(MANAGER_ADDRESS); Vat public vat = Vat(VAT_ADDRESS); Spotter public spotter = Spotter(SPOTTER_ADDRESS); MCDSaverProxy public saverProxy; event Subscribed(address indexed owner, uint cdpId); event Unsubscribed(address indexed owner, uint cdpId); event Updated(address indexed owner, uint cdpId); event ParamUpdates(address indexed owner, uint cdpId, uint128, uint128, uint128, uint128, bool boostEnabled); /// @param _saverProxy Address of the MCDSaverProxy contract constructor(address _saverProxy) public { saverProxy = MCDSaverProxy(payable(_saverProxy)); minLimits[ETH_ILK] = 1700000000000000000; minLimits[BAT_ILK] = 1700000000000000000; } /// @dev Called by the DSProxy contract which owns the CDP /// @notice Adds the users CDP in the list of subscriptions so it can be monitored /// @param _cdpId Id of the CDP /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalBoost Ratio amount which boost should target /// @param _optimalRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled /// @param _nextPriceEnabled Boolean determing if we can use nextPrice for this cdp function subscribe(uint _cdpId, uint128 _minRatio, uint128 _maxRatio, uint128 _optimalBoost, uint128 _optimalRepay, bool _boostEnabled, bool _nextPriceEnabled) external { require(isOwner(msg.sender, _cdpId), "Must be called by Cdp owner"); // if boost is not enabled, set max ratio to max uint uint128 localMaxRatio = _boostEnabled ? _maxRatio : uint128(-1); require(checkParams(manager.ilks(_cdpId), _minRatio, localMaxRatio), "Must be correct params"); SubPosition storage subInfo = subscribersPos[_cdpId]; CdpHolder memory subscription = CdpHolder({ minRatio: _minRatio, maxRatio: localMaxRatio, optimalRatioBoost: _optimalBoost, optimalRatioRepay: _optimalRepay, owner: msg.sender, cdpId: _cdpId, boostEnabled: _boostEnabled, nextPriceEnabled: _nextPriceEnabled }); changeIndex++; if (subInfo.subscribed) { subscribers[subInfo.arrPos] = subscription; emit Updated(msg.sender, _cdpId); emit ParamUpdates(msg.sender, _cdpId, _minRatio, localMaxRatio, _optimalBoost, _optimalRepay, _boostEnabled); } else { subscribers.push(subscription); subInfo.arrPos = subscribers.length - 1; subInfo.subscribed = true; emit Subscribed(msg.sender, _cdpId); } } /// @notice Called by the users DSProxy /// @dev Owner who subscribed cancels his subscription function unsubscribe(uint _cdpId) external { require(isOwner(msg.sender, _cdpId), "Must be called by Cdp owner"); _unsubscribe(_cdpId); } /// @dev Checks if the _owner is the owner of the CDP function isOwner(address _owner, uint _cdpId) internal view returns (bool) { return getOwner(_cdpId) == _owner; } /// @dev Checks limit for minimum ratio and if minRatio is bigger than max function checkParams(bytes32 _ilk, uint128 _minRatio, uint128 _maxRatio) internal view returns (bool) { if (_minRatio < minLimits[_ilk]) { return false; } if (_minRatio > _maxRatio) { return false; } return true; } /// @dev Internal method to remove a subscriber from the list function _unsubscribe(uint _cdpId) internal { require(subscribers.length > 0, "Must have subscribers in the list"); SubPosition storage subInfo = subscribersPos[_cdpId]; require(subInfo.subscribed, "Must first be subscribed"); uint lastCdpId = subscribers[subscribers.length - 1].cdpId; SubPosition storage subInfo2 = subscribersPos[lastCdpId]; subInfo2.arrPos = subInfo.arrPos; subscribers[subInfo.arrPos] = subscribers[subscribers.length - 1]; subscribers.pop(); changeIndex++; subInfo.subscribed = false; subInfo.arrPos = 0; emit Unsubscribed(msg.sender, _cdpId); } /// @notice Returns an address that owns the CDP /// @param _cdpId Id of the CDP function getOwner(uint _cdpId) public view returns(address) { return manager.owns(_cdpId); } /// @notice Helper method for the front to get all the info about the subscribed CDP function getSubscribedInfo(uint _cdpId) public view returns(bool, uint128, uint128, uint128, uint128, address, uint coll, uint debt) { SubPosition memory subInfo = subscribersPos[_cdpId]; if (!subInfo.subscribed) return (false, 0, 0, 0, 0, address(0), 0, 0); (coll, debt) = saverProxy.getCdpInfo(manager, _cdpId, manager.ilks(_cdpId)); CdpHolder memory subscriber = subscribers[subInfo.arrPos]; return ( true, subscriber.minRatio, subscriber.maxRatio, subscriber.optimalRatioRepay, subscriber.optimalRatioBoost, subscriber.owner, coll, debt ); } function getCdpHolder(uint _cdpId) public view returns (bool subscribed, CdpHolder memory) { SubPosition memory subInfo = subscribersPos[_cdpId]; if (!subInfo.subscribed) return (false, CdpHolder(0, 0, 0, 0, address(0), 0, false, false)); CdpHolder memory subscriber = subscribers[subInfo.arrPos]; return (true, subscriber); } /// @notice Helper method for the front to get the information about the ilk of a CDP function getIlkInfo(bytes32 _ilk, uint _cdpId) public view returns(bytes32 ilk, uint art, uint rate, uint spot, uint line, uint dust, uint mat, uint par) { // send either ilk or cdpId if (_ilk == bytes32(0)) { _ilk = manager.ilks(_cdpId); } ilk = _ilk; (,mat) = spotter.ilks(_ilk); par = spotter.par(); (art, rate, spot, line, dust) = vat.ilks(_ilk); } /// @notice Helper method to return all the subscribed CDPs function getSubscribers() public view returns (CdpHolder[] memory) { return subscribers; } /// @notice Helper method to return all the subscribed CDPs function getSubscribersByPage(uint _page, uint _perPage) public view returns (CdpHolder[] memory) { CdpHolder[] memory holders = new CdpHolder[](_perPage); uint start = _page * _perPage; uint end = start + _perPage; uint count = 0; for (uint i=start; i<end; i++) { holders[count] = subscribers[i]; count++; } return holders; } ////////////// ADMIN METHODS /////////////////// /// @notice Admin function to change a min. limit for an asset function changeMinRatios(bytes32 _ilk, uint _newRatio) public onlyOwner { minLimits[_ilk] = _newRatio; } /// @notice Admin function to unsubscribe a CDP function unsubscribeByAdmin(uint _cdpId) public onlyOwner { SubPosition storage subInfo = subscribersPos[_cdpId]; if (subInfo.subscribed) { _unsubscribe(_cdpId); } } } contract BidProxy { address public constant DAI_JOIN = 0x9759A6Ac90977b93B58547b4A71c78317f391A28; address public constant VAT_ADDRESS = 0x35D1b3F3D7966A1DFe207aa4514C12a259A0492B; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; function daiBid(uint _bidId, uint _amount, address _flipper) public { uint tendAmount = _amount * (10 ** 27); joinDai(_amount); (, uint lot, , , , , , ) = Flipper(_flipper).bids(_bidId); Vat(VAT_ADDRESS).hope(_flipper); Flipper(_flipper).tend(_bidId, lot, tendAmount); } function collateralBid(uint _bidId, uint _amount, address _flipper) public { (uint bid, , , , , , , ) = Flipper(_flipper).bids(_bidId); joinDai(bid / (10**27)); Vat(VAT_ADDRESS).hope(_flipper); Flipper(_flipper).dent(_bidId, _amount, bid); } function closeBid(uint _bidId, address _flipper, address _joinAddr) public { bytes32 ilk = Join(_joinAddr).ilk(); Flipper(_flipper).deal(_bidId); uint amount = Vat(VAT_ADDRESS).gem(ilk, address(this)); Vat(VAT_ADDRESS).hope(_joinAddr); Gem(_joinAddr).exit(msg.sender, amount); } function exitCollateral(address _joinAddr) public { bytes32 ilk = Join(_joinAddr).ilk(); uint amount = Vat(VAT_ADDRESS).gem(ilk, address(this)); Vat(VAT_ADDRESS).hope(_joinAddr); Gem(_joinAddr).exit(msg.sender, amount); } function exitDai() public { uint amount = Vat(VAT_ADDRESS).dai(address(this)) / (10**27); Vat(VAT_ADDRESS).hope(DAI_JOIN); Gem(DAI_JOIN).exit(msg.sender, amount); } function withdrawToken(address _token) public { uint balance = ERC20(_token).balanceOf(address(this)); ERC20(_token).transfer(msg.sender, balance); } function withdrawEth() public { uint balance = address(this).balance; msg.sender.transfer(balance); } function joinDai(uint _amount) internal { uint amountInVat = Vat(VAT_ADDRESS).dai(address(this)) / (10**27); if (_amount > amountInVat) { uint amountDiff = (_amount - amountInVat) + 1; ERC20(DAI_ADDRESS).transferFrom(msg.sender, address(this), amountDiff); ERC20(DAI_ADDRESS).approve(DAI_JOIN, amountDiff); Join(DAI_JOIN).join(address(this), amountDiff); } } } abstract contract IMCDSubscriptions { function unsubscribe(uint256 _cdpId) external virtual ; function subscribersPos(uint256 _cdpId) external virtual returns (uint256, bool); } abstract contract GemLike { function approve(address, uint256) public virtual; function transfer(address, uint256) public virtual; function transferFrom(address, address, uint256) public virtual; function deposit() public virtual payable; function withdraw(uint256) public virtual; } abstract contract ManagerLike { function cdpCan(address, uint256, address) public virtual view returns (uint256); function ilks(uint256) public virtual view returns (bytes32); function owns(uint256) public virtual view returns (address); function urns(uint256) public virtual view returns (address); function vat() public virtual view returns (address); function open(bytes32, address) public virtual returns (uint256); function give(uint256, address) public virtual; function cdpAllow(uint256, address, uint256) public virtual; function urnAllow(address, uint256) public virtual; function frob(uint256, int256, int256) public virtual; function flux(uint256, address, uint256) public virtual; function move(uint256, address, uint256) public virtual; function exit(address, uint256, address, uint256) public virtual; function quit(uint256, address) public virtual; function enter(address, uint256) public virtual; function shift(uint256, uint256) public virtual; } abstract contract VatLike { function can(address, address) public virtual view returns (uint256); function ilks(bytes32) public virtual view returns (uint256, uint256, uint256, uint256, uint256); function dai(address) public virtual view returns (uint256); function urns(bytes32, address) public virtual view returns (uint256, uint256); function frob(bytes32, address, address, address, int256, int256) public virtual; function hope(address) public virtual; function move(address, address, uint256) public virtual; } abstract contract GemJoinLike { function dec() public virtual returns (uint256); function gem() public virtual returns (GemLike); function join(address, uint256) public virtual payable; function exit(address, uint256) public virtual; } abstract contract GNTJoinLike { function bags(address) public virtual view returns (address); function make(address) public virtual returns (address); } abstract contract DaiJoinLike { function vat() public virtual returns (VatLike); function dai() public virtual returns (GemLike); function join(address, uint256) public virtual payable; function exit(address, uint256) public virtual; } abstract contract HopeLike { function hope(address) public virtual; function nope(address) public virtual; } abstract contract ProxyRegistryInterface { function build(address) public virtual returns (address); } abstract contract EndLike { function fix(bytes32) public virtual view returns (uint256); function cash(bytes32, uint256) public virtual; function free(bytes32) public virtual; function pack(uint256) public virtual; function skim(bytes32, address) public virtual; } abstract contract JugLike { function drip(bytes32) public virtual returns (uint256); } abstract contract PotLike { function pie(address) public virtual view returns (uint256); function drip() public virtual returns (uint256); function join(uint256) public virtual; function exit(uint256) public virtual; } abstract contract ProxyRegistryLike { function proxies(address) public virtual view returns (address); function build(address) public virtual returns (address); } abstract contract ProxyLike { function owner() public virtual view returns (address); } contract Common { uint256 constant RAY = 10**27; // Internal functions function mul(uint256 x, uint256 y) internal pure returns (uint256 z) { require(y == 0 || (z = x * y) / y == x, "mul-overflow"); } // Public functions // solhint-disable-next-line func-name-mixedcase function daiJoin_join(address apt, address urn, uint256 wad) public { // Gets DAI from the user's wallet DaiJoinLike(apt).dai().transferFrom(msg.sender, address(this), wad); // Approves adapter to take the DAI amount DaiJoinLike(apt).dai().approve(apt, wad); // Joins DAI into the vat DaiJoinLike(apt).join(urn, wad); } } contract MCDCreateProxyActions is Common { // Internal functions function sub(uint256 x, uint256 y) internal pure returns (uint256 z) { require((z = x - y) <= x, "sub-overflow"); } function toInt(uint256 x) internal pure returns (int256 y) { y = int256(x); require(y >= 0, "int-overflow"); } function toRad(uint256 wad) internal pure returns (uint256 rad) { rad = mul(wad, 10**27); } function convertTo18(address gemJoin, uint256 amt) internal returns (uint256 wad) { // For those collaterals that have less than 18 decimals precision we need to do the conversion before passing to frob function // Adapters will automatically handle the difference of precision wad = mul(amt, 10**(18 - GemJoinLike(gemJoin).dec())); } function _getDrawDart(address vat, address jug, address urn, bytes32 ilk, uint256 wad) internal returns (int256 dart) { // Updates stability fee rate uint256 rate = JugLike(jug).drip(ilk); // Gets DAI balance of the urn in the vat uint256 dai = VatLike(vat).dai(urn); // If there was already enough DAI in the vat balance, just exits it without adding more debt if (dai < mul(wad, RAY)) { // Calculates the needed dart so together with the existing dai in the vat is enough to exit wad amount of DAI tokens dart = toInt(sub(mul(wad, RAY), dai) / rate); // This is neeeded due lack of precision. It might need to sum an extra dart wei (for the given DAI wad amount) dart = mul(uint256(dart), rate) < mul(wad, RAY) ? dart + 1 : dart; } } function _getWipeDart(address vat, uint256 dai, address urn, bytes32 ilk) internal view returns (int256 dart) { // Gets actual rate from the vat (, uint256 rate, , , ) = VatLike(vat).ilks(ilk); // Gets actual art value of the urn (, uint256 art) = VatLike(vat).urns(ilk, urn); // Uses the whole dai balance in the vat to reduce the debt dart = toInt(dai / rate); // Checks the calculated dart is not higher than urn.art (total debt), otherwise uses its value dart = uint256(dart) <= art ? -dart : -toInt(art); } function _getWipeAllWad(address vat, address usr, address urn, bytes32 ilk) internal view returns (uint256 wad) { // Gets actual rate from the vat (, uint256 rate, , , ) = VatLike(vat).ilks(ilk); // Gets actual art value of the urn (, uint256 art) = VatLike(vat).urns(ilk, urn); // Gets actual dai amount in the urn uint256 dai = VatLike(vat).dai(usr); uint256 rad = sub(mul(art, rate), dai); wad = rad / RAY; // If the rad precision has some dust, it will need to request for 1 extra wad wei wad = mul(wad, RAY) < rad ? wad + 1 : wad; } // Public functions function transfer(address gem, address dst, uint256 wad) public { GemLike(gem).transfer(dst, wad); } // solhint-disable-next-line func-name-mixedcase function ethJoin_join(address apt, address urn) public payable { // Wraps ETH in WETH GemJoinLike(apt).gem().deposit{value: msg.value}(); // Approves adapter to take the WETH amount GemJoinLike(apt).gem().approve(address(apt), msg.value); // Joins WETH collateral into the vat GemJoinLike(apt).join(urn, msg.value); } // solhint-disable-next-line func-name-mixedcase function gemJoin_join(address apt, address urn, uint256 wad, bool transferFrom) public { // Only executes for tokens that have approval/transferFrom implementation if (transferFrom) { // Gets token from the user's wallet GemJoinLike(apt).gem().transferFrom(msg.sender, address(this), wad); // Approves adapter to take the token amount GemJoinLike(apt).gem().approve(apt, 0); GemJoinLike(apt).gem().approve(apt, wad); } // Joins token collateral into the vat GemJoinLike(apt).join(urn, wad); } function hope(address obj, address usr) public { HopeLike(obj).hope(usr); } function nope(address obj, address usr) public { HopeLike(obj).nope(usr); } function open(address manager, bytes32 ilk, address usr) public returns (uint256 cdp) { cdp = ManagerLike(manager).open(ilk, usr); } function give(address manager, uint256 cdp, address usr) public { ManagerLike(manager).give(cdp, usr); } function move(address manager, uint256 cdp, address dst, uint256 rad) public { ManagerLike(manager).move(cdp, dst, rad); } function frob(address manager, uint256 cdp, int256 dink, int256 dart) public { ManagerLike(manager).frob(cdp, dink, dart); } function lockETH(address manager, address ethJoin, uint256 cdp) public payable { // Receives ETH amount, converts it to WETH and joins it into the vat ethJoin_join(ethJoin, address(this)); // Locks WETH amount into the CDP VatLike(ManagerLike(manager).vat()).frob( ManagerLike(manager).ilks(cdp), ManagerLike(manager).urns(cdp), address(this), address(this), toInt(msg.value), 0 ); } function lockGem(address manager, address gemJoin, uint256 cdp, uint256 wad, bool transferFrom) public { // Takes token amount from user's wallet and joins into the vat gemJoin_join(gemJoin, address(this), wad, transferFrom); // Locks token amount into the CDP VatLike(ManagerLike(manager).vat()).frob( ManagerLike(manager).ilks(cdp), ManagerLike(manager).urns(cdp), address(this), address(this), toInt(convertTo18(gemJoin, wad)), 0 ); } function draw(address manager, address jug, address daiJoin, uint256 cdp, uint256 wad) public { address urn = ManagerLike(manager).urns(cdp); address vat = ManagerLike(manager).vat(); bytes32 ilk = ManagerLike(manager).ilks(cdp); // Generates debt in the CDP frob(manager, cdp, 0, _getDrawDart(vat, jug, urn, ilk, wad)); // Moves the DAI amount (balance in the vat in rad) to proxy's address move(manager, cdp, address(this), toRad(wad)); // Allows adapter to access to proxy's DAI balance in the vat if (VatLike(vat).can(address(this), address(daiJoin)) == 0) { VatLike(vat).hope(daiJoin); } // Exits DAI to the user's wallet as a token DaiJoinLike(daiJoin).exit(msg.sender, wad); } function lockETHAndDraw( address manager, address jug, address ethJoin, address daiJoin, uint256 cdp, uint256 wadD ) public payable { address urn = ManagerLike(manager).urns(cdp); address vat = ManagerLike(manager).vat(); bytes32 ilk = ManagerLike(manager).ilks(cdp); // Receives ETH amount, converts it to WETH and joins it into the vat ethJoin_join(ethJoin, urn); // Locks WETH amount into the CDP and generates debt frob(manager, cdp, toInt(msg.value), _getDrawDart(vat, jug, urn, ilk, wadD)); // Moves the DAI amount (balance in the vat in rad) to proxy's address move(manager, cdp, address(this), toRad(wadD)); // Allows adapter to access to proxy's DAI balance in the vat if (VatLike(vat).can(address(this), address(daiJoin)) == 0) { VatLike(vat).hope(daiJoin); } // Exits DAI to the user's wallet as a token DaiJoinLike(daiJoin).exit(msg.sender, wadD); } function openLockETHAndDraw( address manager, address jug, address ethJoin, address daiJoin, bytes32 ilk, uint256 wadD, address owner ) public payable returns (uint256 cdp) { cdp = open(manager, ilk, address(this)); lockETHAndDraw(manager, jug, ethJoin, daiJoin, cdp, wadD); give(manager, cdp, owner); } function lockGemAndDraw( address manager, address jug, address gemJoin, address daiJoin, uint256 cdp, uint256 wadC, uint256 wadD, bool transferFrom ) public { address urn = ManagerLike(manager).urns(cdp); address vat = ManagerLike(manager).vat(); bytes32 ilk = ManagerLike(manager).ilks(cdp); // Takes token amount from user's wallet and joins into the vat gemJoin_join(gemJoin, urn, wadC, transferFrom); // Locks token amount into the CDP and generates debt frob( manager, cdp, toInt(convertTo18(gemJoin, wadC)), _getDrawDart(vat, jug, urn, ilk, wadD) ); // Moves the DAI amount (balance in the vat in rad) to proxy's address move(manager, cdp, address(this), toRad(wadD)); // Allows adapter to access to proxy's DAI balance in the vat if (VatLike(vat).can(address(this), address(daiJoin)) == 0) { VatLike(vat).hope(daiJoin); } // Exits DAI to the user's wallet as a token DaiJoinLike(daiJoin).exit(msg.sender, wadD); } function openLockGemAndDraw( address manager, address jug, address gemJoin, address daiJoin, bytes32 ilk, uint256 wadC, uint256 wadD, bool transferFrom, address owner ) public returns (uint256 cdp) { cdp = open(manager, ilk, address(this)); lockGemAndDraw(manager, jug, gemJoin, daiJoin, cdp, wadC, wadD, transferFrom); give(manager, cdp, owner); } } contract MCDCreateTaker { using SafeERC20 for ERC20; address payable public constant MCD_CREATE_FLASH_LOAN = 0x71eC9a4fCE561c3936a511D9ebb05B60CF2bA519; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; address public constant ETH_JOIN_ADDRESS = 0x2F0b23f53734252Bda2277357e97e1517d6B042A; ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); // solhint-disable-next-line const-name-snakecase Manager public constant manager = Manager(0x5ef30b9986345249bc32d8928B7ee64DE9435E39); // solhint-disable-next-line const-name-snakecase DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); struct CreateData { uint collAmount; uint daiAmount; address joinAddr; } function openWithLoan( SaverExchangeCore.ExchangeData memory _exchangeData, CreateData memory _createData ) public payable { MCD_CREATE_FLASH_LOAN.transfer(msg.value); //0x fee if (_createData.joinAddr != ETH_JOIN_ADDRESS) { ERC20(getCollateralAddr(_createData.joinAddr)).safeTransferFrom(msg.sender, address(this), _createData.collAmount); ERC20(getCollateralAddr(_createData.joinAddr)).safeTransfer(MCD_CREATE_FLASH_LOAN, _createData.collAmount); } (uint[6] memory numData, address[5] memory addrData, bytes memory callData) = _packData(_createData, _exchangeData); bytes memory paramsData = abi.encode(numData, addrData, callData, address(this)); lendingPool.flashLoan(MCD_CREATE_FLASH_LOAN, DAI_ADDRESS, _createData.daiAmount, paramsData); logger.Log(address(this), msg.sender, "MCDCreate", abi.encode(manager.last(address(this)), _createData.collAmount, _createData.daiAmount)); } function getCollateralAddr(address _joinAddr) internal view returns (address) { return address(Join(_joinAddr).gem()); } function _packData( CreateData memory _createData, SaverExchangeCore.ExchangeData memory exchangeData ) internal pure returns (uint[6] memory numData, address[5] memory addrData, bytes memory callData) { numData = [ _createData.collAmount, _createData.daiAmount, exchangeData.srcAmount, exchangeData.destAmount, exchangeData.minPrice, exchangeData.price0x ]; addrData = [ exchangeData.srcAddr, exchangeData.destAddr, exchangeData.exchangeAddr, exchangeData.wrapper, _createData.joinAddr ]; callData = exchangeData.callData; } } abstract contract GemLike { function approve(address, uint) virtual public; function transfer(address, uint) virtual public; function transferFrom(address, address, uint) virtual public; function deposit() virtual public payable; function withdraw(uint) virtual public; } abstract contract ManagerLike { function cdpCan(address, uint, address) virtual public view returns (uint); function ilks(uint) virtual public view returns (bytes32); function owns(uint) virtual public view returns (address); function urns(uint) virtual public view returns (address); function vat() virtual public view returns (address); function open(bytes32, address) virtual public returns (uint); function give(uint, address) virtual public; function cdpAllow(uint, address, uint) virtual public; function urnAllow(address, uint) virtual public; function frob(uint, int, int) virtual public; function flux(uint, address, uint) virtual public; function move(uint, address, uint) virtual public; function exit(address, uint, address, uint) virtual public; function quit(uint, address) virtual public; function enter(address, uint) virtual public; function shift(uint, uint) virtual public; } abstract contract VatLike { function can(address, address) virtual public view returns (uint); function ilks(bytes32) virtual public view returns (uint, uint, uint, uint, uint); function dai(address) virtual public view returns (uint); function urns(bytes32, address) virtual public view returns (uint, uint); function frob(bytes32, address, address, address, int, int) virtual public; function hope(address) virtual public; function move(address, address, uint) virtual public; } abstract contract GemJoinLike { function dec() virtual public returns (uint); function gem() virtual public returns (GemLike); function join(address, uint) virtual public payable; function exit(address, uint) virtual public; } abstract contract GNTJoinLike { function bags(address) virtual public view returns (address); function make(address) virtual public returns (address); } abstract contract DaiJoinLike { function vat() virtual public returns (VatLike); function dai() virtual public returns (GemLike); function join(address, uint) virtual public payable; function exit(address, uint) virtual public; } abstract contract HopeLike { function hope(address) virtual public; function nope(address) virtual public; } abstract contract ProxyRegistryInterface { function proxies(address _owner) virtual public view returns (address); function build(address) virtual public returns (address); } abstract contract EndLike { function fix(bytes32) virtual public view returns (uint); function cash(bytes32, uint) virtual public; function free(bytes32) virtual public; function pack(uint) virtual public; function skim(bytes32, address) virtual public; } abstract contract JugLike { function drip(bytes32) virtual public returns (uint); } abstract contract PotLike { function pie(address) virtual public view returns (uint); function drip() virtual public returns (uint); function join(uint) virtual public; function exit(uint) virtual public; } abstract contract ProxyRegistryLike { function proxies(address) virtual public view returns (address); function build(address) virtual public returns (address); } abstract contract ProxyLike { function owner() virtual public view returns (address); } abstract contract DSProxy { function execute(address _target, bytes memory _data) virtual public payable returns (bytes32); function setOwner(address owner_) virtual public; } contract Common { uint256 constant RAY = 10 ** 27; // Internal functions function mul(uint x, uint y) internal pure returns (uint z) { require(y == 0 || (z = x * y) / y == x, "mul-overflow"); } // Public functions function daiJoin_join(address apt, address urn, uint wad) public { // Gets DAI from the user's wallet DaiJoinLike(apt).dai().transferFrom(msg.sender, address(this), wad); // Approves adapter to take the DAI amount DaiJoinLike(apt).dai().approve(apt, wad); // Joins DAI into the vat DaiJoinLike(apt).join(urn, wad); } } contract SaverProxyActions is Common { event CDPAction(string indexed, uint indexed, uint, uint); // Internal functions function sub(uint x, uint y) internal pure returns (uint z) { require((z = x - y) <= x, "sub-overflow"); } function toInt(uint x) internal pure returns (int y) { y = int(x); require(y >= 0, "int-overflow"); } function toRad(uint wad) internal pure returns (uint rad) { rad = mul(wad, 10 ** 27); } function convertTo18(address gemJoin, uint256 amt) internal returns (uint256 wad) { // For those collaterals that have less than 18 decimals precision we need to do the conversion before passing to frob function // Adapters will automatically handle the difference of precision wad = mul( amt, 10 ** (18 - GemJoinLike(gemJoin).dec()) ); } function _getDrawDart( address vat, address jug, address urn, bytes32 ilk, uint wad ) internal returns (int dart) { // Updates stability fee rate uint rate = JugLike(jug).drip(ilk); // Gets DAI balance of the urn in the vat uint dai = VatLike(vat).dai(urn); // If there was already enough DAI in the vat balance, just exits it without adding more debt if (dai < mul(wad, RAY)) { // Calculates the needed dart so together with the existing dai in the vat is enough to exit wad amount of DAI tokens dart = toInt(sub(mul(wad, RAY), dai) / rate); // This is neeeded due lack of precision. It might need to sum an extra dart wei (for the given DAI wad amount) dart = mul(uint(dart), rate) < mul(wad, RAY) ? dart + 1 : dart; } } function _getWipeDart( address vat, uint dai, address urn, bytes32 ilk ) internal view returns (int dart) { // Gets actual rate from the vat (, uint rate,,,) = VatLike(vat).ilks(ilk); // Gets actual art value of the urn (, uint art) = VatLike(vat).urns(ilk, urn); // Uses the whole dai balance in the vat to reduce the debt dart = toInt(dai / rate); // Checks the calculated dart is not higher than urn.art (total debt), otherwise uses its value dart = uint(dart) <= art ? - dart : - toInt(art); } function _getWipeAllWad( address vat, address usr, address urn, bytes32 ilk ) internal view returns (uint wad) { // Gets actual rate from the vat (, uint rate,,,) = VatLike(vat).ilks(ilk); // Gets actual art value of the urn (, uint art) = VatLike(vat).urns(ilk, urn); // Gets actual dai amount in the urn uint dai = VatLike(vat).dai(usr); uint rad = sub(mul(art, rate), dai); wad = rad / RAY; // If the rad precision has some dust, it will need to request for 1 extra wad wei wad = mul(wad, RAY) < rad ? wad + 1 : wad; } // Public functions function transfer(address gem, address dst, uint wad) public { GemLike(gem).transfer(dst, wad); } function ethJoin_join(address apt, address urn) public payable { // Wraps ETH in WETH GemJoinLike(apt).gem().deposit{value: msg.value}(); // Approves adapter to take the WETH amount GemJoinLike(apt).gem().approve(address(apt), msg.value); // Joins WETH collateral into the vat GemJoinLike(apt).join(urn, msg.value); } function gemJoin_join(address apt, address urn, uint wad, bool transferFrom) public { // Only executes for tokens that have approval/transferFrom implementation if (transferFrom) { // Gets token from the user's wallet GemJoinLike(apt).gem().transferFrom(msg.sender, address(this), wad); // Approves adapter to take the token amount GemJoinLike(apt).gem().approve(apt, 0); GemJoinLike(apt).gem().approve(apt, wad); } // Joins token collateral into the vat GemJoinLike(apt).join(urn, wad); } function hope( address obj, address usr ) public { HopeLike(obj).hope(usr); } function nope( address obj, address usr ) public { HopeLike(obj).nope(usr); } function open( address manager, bytes32 ilk, address usr ) public returns (uint cdp) { cdp = ManagerLike(manager).open(ilk, usr); } function give( address manager, uint cdp, address usr ) public { ManagerLike(manager).give(cdp, usr); emit CDPAction('give', cdp, 0, 0); } function giveToProxy( address proxyRegistry, address manager, uint cdp, address dst ) public { // Gets actual proxy address address proxy = ProxyRegistryLike(proxyRegistry).proxies(dst); // Checks if the proxy address already existed and dst address is still the owner if (proxy == address(0) || ProxyLike(proxy).owner() != dst) { uint csize; assembly { csize := extcodesize(dst) } // We want to avoid creating a proxy for a contract address that might not be able to handle proxies, then losing the CDP require(csize == 0, "Dst-is-a-contract"); // Creates the proxy for the dst address proxy = ProxyRegistryLike(proxyRegistry).build(dst); } // Transfers CDP to the dst proxy give(manager, cdp, proxy); } function cdpAllow( address manager, uint cdp, address usr, uint ok ) public { ManagerLike(manager).cdpAllow(cdp, usr, ok); } function urnAllow( address manager, address usr, uint ok ) public { ManagerLike(manager).urnAllow(usr, ok); } function flux( address manager, uint cdp, address dst, uint wad ) public { ManagerLike(manager).flux(cdp, dst, wad); } function move( address manager, uint cdp, address dst, uint rad ) public { ManagerLike(manager).move(cdp, dst, rad); } function frob( address manager, uint cdp, int dink, int dart ) public { ManagerLike(manager).frob(cdp, dink, dart); } function quit( address manager, uint cdp, address dst ) public { ManagerLike(manager).quit(cdp, dst); } function enter( address manager, address src, uint cdp ) public { ManagerLike(manager).enter(src, cdp); } function shift( address manager, uint cdpSrc, uint cdpOrg ) public { ManagerLike(manager).shift(cdpSrc, cdpOrg); } function makeGemBag( address gemJoin ) public returns (address bag) { bag = GNTJoinLike(gemJoin).make(address(this)); } function lockETH( address manager, address ethJoin, uint cdp ) public payable { // Receives ETH amount, converts it to WETH and joins it into the vat ethJoin_join(ethJoin, address(this)); // Locks WETH amount into the CDP VatLike(ManagerLike(manager).vat()).frob( ManagerLike(manager).ilks(cdp), ManagerLike(manager).urns(cdp), address(this), address(this), toInt(msg.value), 0 ); emit CDPAction('lockETH', cdp, msg.value, 0); } function lockGem( address manager, address gemJoin, uint cdp, uint wad, bool transferFrom ) public { // Takes token amount from user's wallet and joins into the vat gemJoin_join(gemJoin, address(this), wad, transferFrom); // Locks token amount into the CDP VatLike(ManagerLike(manager).vat()).frob( ManagerLike(manager).ilks(cdp), ManagerLike(manager).urns(cdp), address(this), address(this), toInt(convertTo18(gemJoin, wad)), 0 ); emit CDPAction('lockGem', cdp, wad, 0); } function freeETH( address manager, address ethJoin, uint cdp, uint wad ) public { // Unlocks WETH amount from the CDP frob(manager, cdp, -toInt(wad), 0); // Moves the amount from the CDP urn to proxy's address flux(manager, cdp, address(this), wad); // Exits WETH amount to proxy address as a token GemJoinLike(ethJoin).exit(address(this), wad); // Converts WETH to ETH GemJoinLike(ethJoin).gem().withdraw(wad); // Sends ETH back to the user's wallet msg.sender.transfer(wad); emit CDPAction('freeETH', cdp, wad, 0); } function freeGem( address manager, address gemJoin, uint cdp, uint wad ) public { uint wad18 = convertTo18(gemJoin, wad); // Unlocks token amount from the CDP frob(manager, cdp, -toInt(wad18), 0); // Moves the amount from the CDP urn to proxy's address flux(manager, cdp, address(this), wad18); // Exits token amount to the user's wallet as a token GemJoinLike(gemJoin).exit(msg.sender, wad); emit CDPAction('freeGem', cdp, wad, 0); } function exitETH( address manager, address ethJoin, uint cdp, uint wad ) public { // Moves the amount from the CDP urn to proxy's address flux(manager, cdp, address(this), wad); // Exits WETH amount to proxy address as a token GemJoinLike(ethJoin).exit(address(this), wad); // Converts WETH to ETH GemJoinLike(ethJoin).gem().withdraw(wad); // Sends ETH back to the user's wallet msg.sender.transfer(wad); } function exitGem( address manager, address gemJoin, uint cdp, uint wad ) public { // Moves the amount from the CDP urn to proxy's address flux(manager, cdp, address(this), convertTo18(gemJoin, wad)); // Exits token amount to the user's wallet as a token GemJoinLike(gemJoin).exit(msg.sender, wad); } function draw( address manager, address jug, address daiJoin, uint cdp, uint wad ) public { address urn = ManagerLike(manager).urns(cdp); address vat = ManagerLike(manager).vat(); bytes32 ilk = ManagerLike(manager).ilks(cdp); // Generates debt in the CDP frob(manager, cdp, 0, _getDrawDart(vat, jug, urn, ilk, wad)); // Moves the DAI amount (balance in the vat in rad) to proxy's address move(manager, cdp, address(this), toRad(wad)); // Allows adapter to access to proxy's DAI balance in the vat if (VatLike(vat).can(address(this), address(daiJoin)) == 0) { VatLike(vat).hope(daiJoin); } // Exits DAI to the user's wallet as a token DaiJoinLike(daiJoin).exit(msg.sender, wad); emit CDPAction('draw', cdp, 0, wad); } function wipe( address manager, address daiJoin, uint cdp, uint wad ) public { address vat = ManagerLike(manager).vat(); address urn = ManagerLike(manager).urns(cdp); bytes32 ilk = ManagerLike(manager).ilks(cdp); address own = ManagerLike(manager).owns(cdp); if (own == address(this) || ManagerLike(manager).cdpCan(own, cdp, address(this)) == 1) { // Joins DAI amount into the vat daiJoin_join(daiJoin, urn, wad); // Paybacks debt to the CDP frob(manager, cdp, 0, _getWipeDart(vat, VatLike(vat).dai(urn), urn, ilk)); } else { // Joins DAI amount into the vat daiJoin_join(daiJoin, address(this), wad); // Paybacks debt to the CDP VatLike(vat).frob( ilk, urn, address(this), address(this), 0, _getWipeDart(vat, wad * RAY, urn, ilk) ); } emit CDPAction('wipe', cdp, 0, wad); } function wipeAll( address manager, address daiJoin, uint cdp ) public { address vat = ManagerLike(manager).vat(); address urn = ManagerLike(manager).urns(cdp); bytes32 ilk = ManagerLike(manager).ilks(cdp); (, uint art) = VatLike(vat).urns(ilk, urn); address own = ManagerLike(manager).owns(cdp); if (own == address(this) || ManagerLike(manager).cdpCan(own, cdp, address(this)) == 1) { // Joins DAI amount into the vat daiJoin_join(daiJoin, urn, _getWipeAllWad(vat, urn, urn, ilk)); // Paybacks debt to the CDP frob(manager, cdp, 0, -int(art)); } else { // Joins DAI amount into the vat daiJoin_join(daiJoin, address(this), _getWipeAllWad(vat, address(this), urn, ilk)); // Paybacks debt to the CDP VatLike(vat).frob( ilk, urn, address(this), address(this), 0, -int(art) ); } emit CDPAction('wipeAll', cdp, 0, art); } function lockETHAndDraw( address manager, address jug, address ethJoin, address daiJoin, uint cdp, uint wadD ) public payable { address urn = ManagerLike(manager).urns(cdp); address vat = ManagerLike(manager).vat(); bytes32 ilk = ManagerLike(manager).ilks(cdp); // Receives ETH amount, converts it to WETH and joins it into the vat ethJoin_join(ethJoin, urn); // Locks WETH amount into the CDP and generates debt frob(manager, cdp, toInt(msg.value), _getDrawDart(vat, jug, urn, ilk, wadD)); // Moves the DAI amount (balance in the vat in rad) to proxy's address move(manager, cdp, address(this), toRad(wadD)); // Allows adapter to access to proxy's DAI balance in the vat if (VatLike(vat).can(address(this), address(daiJoin)) == 0) { VatLike(vat).hope(daiJoin); } // Exits DAI to the user's wallet as a token DaiJoinLike(daiJoin).exit(msg.sender, wadD); } function openLockETHAndDraw( address manager, address jug, address ethJoin, address daiJoin, bytes32 ilk, uint wadD ) public payable returns (uint cdp) { cdp = open(manager, ilk, address(this)); lockETHAndDraw(manager, jug, ethJoin, daiJoin, cdp, wadD); emit CDPAction('openLockETHAndDraw', cdp, msg.value, wadD); } function lockGemAndDraw( address manager, address jug, address gemJoin, address daiJoin, uint cdp, uint wadC, uint wadD, bool transferFrom ) public { address urn = ManagerLike(manager).urns(cdp); address vat = ManagerLike(manager).vat(); bytes32 ilk = ManagerLike(manager).ilks(cdp); // Takes token amount from user's wallet and joins into the vat gemJoin_join(gemJoin, urn, wadC, transferFrom); // Locks token amount into the CDP and generates debt frob(manager, cdp, toInt(convertTo18(gemJoin, wadC)), _getDrawDart(vat, jug, urn, ilk, wadD)); // Moves the DAI amount (balance in the vat in rad) to proxy's address move(manager, cdp, address(this), toRad(wadD)); // Allows adapter to access to proxy's DAI balance in the vat if (VatLike(vat).can(address(this), address(daiJoin)) == 0) { VatLike(vat).hope(daiJoin); } // Exits DAI to the user's wallet as a token DaiJoinLike(daiJoin).exit(msg.sender, wadD); } function openLockGemAndDraw( address manager, address jug, address gemJoin, address daiJoin, bytes32 ilk, uint wadC, uint wadD, bool transferFrom ) public returns (uint cdp) { cdp = open(manager, ilk, address(this)); lockGemAndDraw(manager, jug, gemJoin, daiJoin, cdp, wadC, wadD, transferFrom); emit CDPAction('openLockGemAndDraw', cdp, wadC, wadD); } function wipeAllAndFreeETH( address manager, address ethJoin, address daiJoin, uint cdp, uint wadC ) public { address vat = ManagerLike(manager).vat(); address urn = ManagerLike(manager).urns(cdp); bytes32 ilk = ManagerLike(manager).ilks(cdp); (, uint art) = VatLike(vat).urns(ilk, urn); // Joins DAI amount into the vat daiJoin_join(daiJoin, urn, _getWipeAllWad(vat, urn, urn, ilk)); // Paybacks debt to the CDP and unlocks WETH amount from it frob( manager, cdp, -toInt(wadC), -int(art) ); // Moves the amount from the CDP urn to proxy's address flux(manager, cdp, address(this), wadC); // Exits WETH amount to proxy address as a token GemJoinLike(ethJoin).exit(address(this), wadC); // Converts WETH to ETH GemJoinLike(ethJoin).gem().withdraw(wadC); // Sends ETH back to the user's wallet msg.sender.transfer(wadC); emit CDPAction('wipeAllAndFreeETH', cdp, wadC, art); } function wipeAndFreeGem( address manager, address gemJoin, address daiJoin, uint cdp, uint wadC, uint wadD ) public { address urn = ManagerLike(manager).urns(cdp); // Joins DAI amount into the vat daiJoin_join(daiJoin, urn, wadD); uint wad18 = convertTo18(gemJoin, wadC); // Paybacks debt to the CDP and unlocks token amount from it frob( manager, cdp, -toInt(wad18), _getWipeDart(ManagerLike(manager).vat(), VatLike(ManagerLike(manager).vat()).dai(urn), urn, ManagerLike(manager).ilks(cdp)) ); // Moves the amount from the CDP urn to proxy's address flux(manager, cdp, address(this), wad18); // Exits token amount to the user's wallet as a token GemJoinLike(gemJoin).exit(msg.sender, wadC); } function wipeAllAndFreeGem( address manager, address gemJoin, address daiJoin, uint cdp, uint wadC ) public { address vat = ManagerLike(manager).vat(); address urn = ManagerLike(manager).urns(cdp); bytes32 ilk = ManagerLike(manager).ilks(cdp); (, uint art) = VatLike(vat).urns(ilk, urn); // Joins DAI amount into the vat daiJoin_join(daiJoin, urn, _getWipeAllWad(vat, urn, urn, ilk)); uint wad18 = convertTo18(gemJoin, wadC); // Paybacks debt to the CDP and unlocks token amount from it frob( manager, cdp, -toInt(wad18), -int(art) ); // Moves the amount from the CDP urn to proxy's address flux(manager, cdp, address(this), wad18); // Exits token amount to the user's wallet as a token GemJoinLike(gemJoin).exit(msg.sender, wadC); emit CDPAction('wipeAllAndFreeGem', cdp, wadC, art); } function createProxyAndCDP( address manager, address jug, address ethJoin, address daiJoin, bytes32 ilk, uint wadD, address registry ) public payable returns(uint) { address proxy = ProxyRegistryInterface(registry).build(msg.sender); uint cdp = openLockETHAndDraw(manager, jug, ethJoin, daiJoin, ilk, wadD ); give(manager, cdp, address(proxy)); return cdp; } function createProxyAndGemCDP( address manager, address jug, address gemJoin, address daiJoin, bytes32 ilk, uint wadC, uint wadD, bool transferFrom, address registry ) public returns(uint) { address proxy = ProxyRegistryInterface(registry).build(msg.sender); uint cdp = openLockGemAndDraw(manager, jug, gemJoin, daiJoin, ilk, wadC, wadD, transferFrom); give(manager, cdp, address(proxy)); return cdp; } } contract MCDSaverProxyHelper is DSMath { /// @notice Returns a normalized debt _amount based on the current rate /// @param _amount Amount of dai to be normalized /// @param _rate Current rate of the stability fee /// @param _daiVatBalance Balance od Dai in the Vat for that CDP function normalizeDrawAmount(uint _amount, uint _rate, uint _daiVatBalance) internal pure returns (int dart) { if (_daiVatBalance < mul(_amount, RAY)) { dart = toPositiveInt(sub(mul(_amount, RAY), _daiVatBalance) / _rate); dart = mul(uint(dart), _rate) < mul(_amount, RAY) ? dart + 1 : dart; } } /// @notice Converts a number to Rad percision /// @param _wad The input number in wad percision function toRad(uint _wad) internal pure returns (uint) { return mul(_wad, 10 ** 27); } /// @notice Converts a number to 18 decimal percision /// @param _joinAddr Join address of the collateral /// @param _amount Number to be converted function convertTo18(address _joinAddr, uint256 _amount) internal view returns (uint256) { return mul(_amount, 10 ** (18 - Join(_joinAddr).dec())); } /// @notice Converts a uint to int and checks if positive /// @param _x Number to be converted function toPositiveInt(uint _x) internal pure returns (int y) { y = int(_x); require(y >= 0, "int-overflow"); } /// @notice Gets Dai amount in Vat which can be added to Cdp /// @param _vat Address of Vat contract /// @param _urn Urn of the Cdp /// @param _ilk Ilk of the Cdp function normalizePaybackAmount(address _vat, address _urn, bytes32 _ilk) internal view returns (int amount) { uint dai = Vat(_vat).dai(_urn); (, uint rate,,,) = Vat(_vat).ilks(_ilk); (, uint art) = Vat(_vat).urns(_ilk, _urn); amount = toPositiveInt(dai / rate); amount = uint(amount) <= art ? - amount : - toPositiveInt(art); } /// @notice Gets the whole debt of the CDP /// @param _vat Address of Vat contract /// @param _usr Address of the Dai holder /// @param _urn Urn of the Cdp /// @param _ilk Ilk of the Cdp function getAllDebt(address _vat, address _usr, address _urn, bytes32 _ilk) internal view returns (uint daiAmount) { (, uint rate,,,) = Vat(_vat).ilks(_ilk); (, uint art) = Vat(_vat).urns(_ilk, _urn); uint dai = Vat(_vat).dai(_usr); uint rad = sub(mul(art, rate), dai); daiAmount = rad / RAY; daiAmount = mul(daiAmount, RAY) < rad ? daiAmount + 1 : daiAmount; } /// @notice Gets the token address from the Join contract /// @param _joinAddr Address of the Join contract function getCollateralAddr(address _joinAddr) internal view returns (address) { return address(Join(_joinAddr).gem()); } /// @notice Gets CDP info (collateral, debt) /// @param _manager Manager contract /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP function getCdpInfo(Manager _manager, uint _cdpId, bytes32 _ilk) public view returns (uint, uint) { address vat = _manager.vat(); address urn = _manager.urns(_cdpId); (uint collateral, uint debt) = Vat(vat).urns(_ilk, urn); (,uint rate,,,) = Vat(vat).ilks(_ilk); return (collateral, rmul(debt, rate)); } /// @notice Address that owns the DSProxy that owns the CDP /// @param _manager Manager contract /// @param _cdpId Id of the CDP function getOwner(Manager _manager, uint _cdpId) public view returns (address) { DSProxy proxy = DSProxy(uint160(_manager.owns(_cdpId))); return proxy.owner(); } } abstract contract ILendingPool { function flashLoan( address payable _receiver, address _reserve, uint _amount, bytes calldata _params) external virtual; } abstract contract ProtocolInterface { function deposit(address _user, uint256 _amount) public virtual; function withdraw(address _user, uint256 _amount) public virtual; } contract SavingsLogger { event Deposit(address indexed sender, uint8 protocol, uint256 amount); event Withdraw(address indexed sender, uint8 protocol, uint256 amount); event Swap(address indexed sender, uint8 fromProtocol, uint8 toProtocol, uint256 amount); function logDeposit(address _sender, uint8 _protocol, uint256 _amount) external { emit Deposit(_sender, _protocol, _amount); } function logWithdraw(address _sender, uint8 _protocol, uint256 _amount) external { emit Withdraw(_sender, _protocol, _amount); } function logSwap(address _sender, uint8 _protocolFrom, uint8 _protocolTo, uint256 _amount) external { emit Swap(_sender, _protocolFrom, _protocolTo, _amount); } } contract AaveSavingsProtocol is ProtocolInterface, DSAuth { address public constant ADAI_ADDRESS = 0xfC1E690f61EFd961294b3e1Ce3313fBD8aa4f85d; address public constant AAVE_LENDING_POOL = 0x398eC7346DcD622eDc5ae82352F02bE94C62d119; address public constant AAVE_LENDING_POOL_CORE = 0x3dfd23A6c5E8BbcFc9581d2E864a68feb6a076d3; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; function deposit(address _user, uint _amount) public override { require(msg.sender == _user); // get dai from user require(ERC20(DAI_ADDRESS).transferFrom(_user, address(this), _amount)); ERC20(DAI_ADDRESS).approve(AAVE_LENDING_POOL_CORE, uint(-1)); ILendingPool(AAVE_LENDING_POOL).deposit(DAI_ADDRESS, _amount, 0); ERC20(ADAI_ADDRESS).transfer(_user, ERC20(ADAI_ADDRESS).balanceOf(address(this))); } function withdraw(address _user, uint _amount) public override { require(msg.sender == _user); require(ERC20(ADAI_ADDRESS).transferFrom(_user, address(this), _amount)); IAToken(ADAI_ADDRESS).redeem(_amount); // return dai we have to user ERC20(DAI_ADDRESS).transfer(_user, _amount); } } contract CompoundSavingsProtocol { address public constant NEW_CDAI_ADDRESS = 0x5d3a536E4D6DbD6114cc1Ead35777bAB948E3643; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; CTokenInterface public constant cDaiContract = CTokenInterface(NEW_CDAI_ADDRESS); function compDeposit(address _user, uint _amount) internal { // get dai from user require(ERC20(DAI_ADDRESS).transferFrom(_user, address(this), _amount)); // mainnet only ERC20(DAI_ADDRESS).approve(NEW_CDAI_ADDRESS, uint(-1)); // mint cDai require(cDaiContract.mint(_amount) == 0, "Failed Mint"); } function compWithdraw(address _user, uint _amount) internal { // transfer all users balance to this contract require(cDaiContract.transferFrom(_user, address(this), ERC20(NEW_CDAI_ADDRESS).balanceOf(_user))); // approve cDai to compound contract cDaiContract.approve(NEW_CDAI_ADDRESS, uint(-1)); // get dai from cDai contract require(cDaiContract.redeemUnderlying(_amount) == 0, "Reedem Failed"); // return to user balance we didn't spend uint cDaiBalance = cDaiContract.balanceOf(address(this)); if (cDaiBalance > 0) { cDaiContract.transfer(_user, cDaiBalance); } // return dai we have to user ERC20(DAI_ADDRESS).transfer(_user, _amount); } } abstract contract VatLike { function can(address, address) virtual public view returns (uint); function ilks(bytes32) virtual public view returns (uint, uint, uint, uint, uint); function dai(address) virtual public view returns (uint); function urns(bytes32, address) virtual public view returns (uint, uint); function frob(bytes32, address, address, address, int, int) virtual public; function hope(address) virtual public; function move(address, address, uint) virtual public; } abstract contract PotLike { function pie(address) virtual public view returns (uint); function drip() virtual public returns (uint); function join(uint) virtual public; function exit(uint) virtual public; } abstract contract GemLike { function approve(address, uint) virtual public; function transfer(address, uint) virtual public; function transferFrom(address, address, uint) virtual public; function deposit() virtual public payable; function withdraw(uint) virtual public; } abstract contract DaiJoinLike { function vat() virtual public returns (VatLike); function dai() virtual public returns (GemLike); function join(address, uint) virtual public payable; function exit(address, uint) virtual public; } contract DSRSavingsProtocol is DSMath { // Mainnet address public constant POT_ADDRESS = 0x197E90f9FAD81970bA7976f33CbD77088E5D7cf7; address public constant DAI_JOIN_ADDRESS = 0x9759A6Ac90977b93B58547b4A71c78317f391A28; function dsrDeposit(uint _amount, bool _fromUser) internal { VatLike vat = DaiJoinLike(DAI_JOIN_ADDRESS).vat(); uint chi = PotLike(POT_ADDRESS).drip(); daiJoin_join(DAI_JOIN_ADDRESS, address(this), _amount, _fromUser); if (vat.can(address(this), address(POT_ADDRESS)) == 0) { vat.hope(POT_ADDRESS); } PotLike(POT_ADDRESS).join(mul(_amount, RAY) / chi); } function dsrWithdraw(uint _amount, bool _toUser) internal { VatLike vat = DaiJoinLike(DAI_JOIN_ADDRESS).vat(); uint chi = PotLike(POT_ADDRESS).drip(); uint pie = mul(_amount, RAY) / chi; PotLike(POT_ADDRESS).exit(pie); uint balance = DaiJoinLike(DAI_JOIN_ADDRESS).vat().dai(address(this)); if (vat.can(address(this), address(DAI_JOIN_ADDRESS)) == 0) { vat.hope(DAI_JOIN_ADDRESS); } address to; if (_toUser) { to = msg.sender; } else { to = address(this); } if (_amount == uint(-1)) { DaiJoinLike(DAI_JOIN_ADDRESS).exit(to, mul(chi, pie) / RAY); } else { DaiJoinLike(DAI_JOIN_ADDRESS).exit( to, balance >= mul(_amount, RAY) ? _amount : balance / RAY ); } } function daiJoin_join(address apt, address urn, uint wad, bool _fromUser) internal { if (_fromUser) { DaiJoinLike(apt).dai().transferFrom(msg.sender, address(this), wad); } DaiJoinLike(apt).dai().approve(apt, wad); DaiJoinLike(apt).join(urn, wad); } } contract DydxSavingsProtocol is ProtocolInterface, DSAuth { address public constant SOLO_MARGIN_ADDRESS = 0x1E0447b19BB6EcFdAe1e4AE1694b0C3659614e4e; ISoloMargin public soloMargin; address public savingsProxy; uint daiMarketId = 3; constructor() public { soloMargin = ISoloMargin(SOLO_MARGIN_ADDRESS); } function addSavingsProxy(address _savingsProxy) public auth { savingsProxy = _savingsProxy; } function deposit(address _user, uint _amount) public override { require(msg.sender == _user); Account.Info[] memory accounts = new Account.Info[](1); accounts[0] = getAccount(_user, 0); Actions.ActionArgs[] memory actions = new Actions.ActionArgs[](1); Types.AssetAmount memory amount = Types.AssetAmount({ sign: true, denomination: Types.AssetDenomination.Wei, ref: Types.AssetReference.Delta, value: _amount }); actions[0] = Actions.ActionArgs({ actionType: Actions.ActionType.Deposit, accountId: 0, amount: amount, primaryMarketId: daiMarketId, otherAddress: _user, secondaryMarketId: 0, //not used otherAccountId: 0, //not used data: "" //not used }); soloMargin.operate(accounts, actions); } function withdraw(address _user, uint _amount) public override { require(msg.sender == _user); Account.Info[] memory accounts = new Account.Info[](1); accounts[0] = getAccount(_user, 0); Actions.ActionArgs[] memory actions = new Actions.ActionArgs[](1); Types.AssetAmount memory amount = Types.AssetAmount({ sign: false, denomination: Types.AssetDenomination.Wei, ref: Types.AssetReference.Delta, value: _amount }); actions[0] = Actions.ActionArgs({ actionType: Actions.ActionType.Withdraw, accountId: 0, amount: amount, primaryMarketId: daiMarketId, otherAddress: _user, secondaryMarketId: 0, //not used otherAccountId: 0, //not used data: "" //not used }); soloMargin.operate(accounts, actions); } function getWeiBalance(address _user, uint _index) public view returns(Types.Wei memory) { Types.Wei[] memory weiBalances; (,,weiBalances) = soloMargin.getAccountBalances(getAccount(_user, _index)); return weiBalances[daiMarketId]; } function getParBalance(address _user, uint _index) public view returns(Types.Par memory) { Types.Par[] memory parBalances; (,parBalances,) = soloMargin.getAccountBalances(getAccount(_user, _index)); return parBalances[daiMarketId]; } function getAccount(address _user, uint _index) public pure returns(Account.Info memory) { Account.Info memory account = Account.Info({ owner: _user, number: _index }); return account; } } abstract contract ISoloMargin { struct OperatorArg { address operator; bool trusted; } function operate( Account.Info[] memory accounts, Actions.ActionArgs[] memory actions ) public virtual; function getAccountBalances( Account.Info memory account ) public view virtual returns ( address[] memory, Types.Par[] memory, Types.Wei[] memory ); function setOperators( OperatorArg[] memory args ) public virtual; function getNumMarkets() public view virtual returns (uint256); function getMarketTokenAddress(uint256 marketId) public view virtual returns (address); } library Account { // ============ Enums ============ /* * Most-recently-cached account status. * * Normal: Can only be liquidated if the account values are violating the global margin-ratio. * Liquid: Can be liquidated no matter the account values. * Can be vaporized if there are no more positive account values. * Vapor: Has only negative (or zeroed) account values. Can be vaporized. * */ enum Status { Normal, Liquid, Vapor } // ============ Structs ============ // Represents the unique key that specifies an account struct Info { address owner; // The address that owns the account uint256 number; // A nonce that allows a single address to control many accounts } // The complete storage for any account struct Storage { mapping (uint256 => Types.Par) balances; // Mapping from marketId to principal Status status; } // ============ Library Functions ============ function equals( Info memory a, Info memory b ) internal pure returns (bool) { return a.owner == b.owner && a.number == b.number; } } library Actions { // ============ Constants ============ bytes32 constant FILE = "Actions"; // ============ Enums ============ enum ActionType { Deposit, // supply tokens Withdraw, // borrow tokens Transfer, // transfer balance between accounts Buy, // buy an amount of some token (externally) Sell, // sell an amount of some token (externally) Trade, // trade tokens against another account Liquidate, // liquidate an undercollateralized or expiring account Vaporize, // use excess tokens to zero-out a completely negative account Call // send arbitrary data to an address } enum AccountLayout { OnePrimary, TwoPrimary, PrimaryAndSecondary } enum MarketLayout { ZeroMarkets, OneMarket, TwoMarkets } // ============ Structs ============ /* * Arguments that are passed to Solo in an ordered list as part of a single operation. * Each ActionArgs has an actionType which specifies which action struct that this data will be * parsed into before being processed. */ struct ActionArgs { ActionType actionType; uint256 accountId; Types.AssetAmount amount; uint256 primaryMarketId; uint256 secondaryMarketId; address otherAddress; uint256 otherAccountId; bytes data; } // ============ Action Types ============ /* * Moves tokens from an address to Solo. Can either repay a borrow or provide additional supply. */ struct DepositArgs { Types.AssetAmount amount; Account.Info account; uint256 market; address from; } /* * Moves tokens from Solo to another address. Can either borrow tokens or reduce the amount * previously supplied. */ struct WithdrawArgs { Types.AssetAmount amount; Account.Info account; uint256 market; address to; } /* * Transfers balance between two accounts. The msg.sender must be an operator for both accounts. * The amount field applies to accountOne. * This action does not require any token movement since the trade is done internally to Solo. */ struct TransferArgs { Types.AssetAmount amount; Account.Info accountOne; Account.Info accountTwo; uint256 market; } /* * Acquires a certain amount of tokens by spending other tokens. Sends takerMarket tokens to the * specified exchangeWrapper contract and expects makerMarket tokens in return. The amount field * applies to the makerMarket. */ struct BuyArgs { Types.AssetAmount amount; Account.Info account; uint256 makerMarket; uint256 takerMarket; address exchangeWrapper; bytes orderData; } /* * Spends a certain amount of tokens to acquire other tokens. Sends takerMarket tokens to the * specified exchangeWrapper and expects makerMarket tokens in return. The amount field applies * to the takerMarket. */ struct SellArgs { Types.AssetAmount amount; Account.Info account; uint256 takerMarket; uint256 makerMarket; address exchangeWrapper; bytes orderData; } /* * Trades balances between two accounts using any external contract that implements the * AutoTrader interface. The AutoTrader contract must be an operator for the makerAccount (for * which it is trading on-behalf-of). The amount field applies to the makerAccount and the * inputMarket. This proposed change to the makerAccount is passed to the AutoTrader which will * quote a change for the makerAccount in the outputMarket (or will disallow the trade). * This action does not require any token movement since the trade is done internally to Solo. */ struct TradeArgs { Types.AssetAmount amount; Account.Info takerAccount; Account.Info makerAccount; uint256 inputMarket; uint256 outputMarket; address autoTrader; bytes tradeData; } /* * Each account must maintain a certain margin-ratio (specified globally). If the account falls * below this margin-ratio, it can be liquidated by any other account. This allows anyone else * (arbitrageurs) to repay any borrowed asset (owedMarket) of the liquidating account in * exchange for any collateral asset (heldMarket) of the liquidAccount. The ratio is determined * by the price ratio (given by the oracles) plus a spread (specified globally). Liquidating an * account also sets a flag on the account that the account is being liquidated. This allows * anyone to continue liquidating the account until there are no more borrows being taken by the * liquidating account. Liquidators do not have to liquidate the entire account all at once but * can liquidate as much as they choose. The liquidating flag allows liquidators to continue * liquidating the account even if it becomes collateralized through partial liquidation or * price movement. */ struct LiquidateArgs { Types.AssetAmount amount; Account.Info solidAccount; Account.Info liquidAccount; uint256 owedMarket; uint256 heldMarket; } /* * Similar to liquidate, but vaporAccounts are accounts that have only negative balances * remaining. The arbitrageur pays back the negative asset (owedMarket) of the vaporAccount in * exchange for a collateral asset (heldMarket) at a favorable spread. However, since the * liquidAccount has no collateral assets, the collateral must come from Solo's excess tokens. */ struct VaporizeArgs { Types.AssetAmount amount; Account.Info solidAccount; Account.Info vaporAccount; uint256 owedMarket; uint256 heldMarket; } /* * Passes arbitrary bytes of data to an external contract that implements the Callee interface. * Does not change any asset amounts. This function may be useful for setting certain variables * on layer-two contracts for certain accounts without having to make a separate Ethereum * transaction for doing so. Also, the second-layer contracts can ensure that the call is coming * from an operator of the particular account. */ struct CallArgs { Account.Info account; address callee; bytes data; } // ============ Helper Functions ============ function getMarketLayout( ActionType actionType ) internal pure returns (MarketLayout) { if ( actionType == Actions.ActionType.Deposit || actionType == Actions.ActionType.Withdraw || actionType == Actions.ActionType.Transfer ) { return MarketLayout.OneMarket; } else if (actionType == Actions.ActionType.Call) { return MarketLayout.ZeroMarkets; } return MarketLayout.TwoMarkets; } function getAccountLayout( ActionType actionType ) internal pure returns (AccountLayout) { if ( actionType == Actions.ActionType.Transfer || actionType == Actions.ActionType.Trade ) { return AccountLayout.TwoPrimary; } else if ( actionType == Actions.ActionType.Liquidate || actionType == Actions.ActionType.Vaporize ) { return AccountLayout.PrimaryAndSecondary; } return AccountLayout.OnePrimary; } // ============ Parsing Functions ============ function parseDepositArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (DepositArgs memory) { assert(args.actionType == ActionType.Deposit); return DepositArgs({ amount: args.amount, account: accounts[args.accountId], market: args.primaryMarketId, from: args.otherAddress }); } function parseWithdrawArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (WithdrawArgs memory) { assert(args.actionType == ActionType.Withdraw); return WithdrawArgs({ amount: args.amount, account: accounts[args.accountId], market: args.primaryMarketId, to: args.otherAddress }); } function parseTransferArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (TransferArgs memory) { assert(args.actionType == ActionType.Transfer); return TransferArgs({ amount: args.amount, accountOne: accounts[args.accountId], accountTwo: accounts[args.otherAccountId], market: args.primaryMarketId }); } function parseBuyArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (BuyArgs memory) { assert(args.actionType == ActionType.Buy); return BuyArgs({ amount: args.amount, account: accounts[args.accountId], makerMarket: args.primaryMarketId, takerMarket: args.secondaryMarketId, exchangeWrapper: args.otherAddress, orderData: args.data }); } function parseSellArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (SellArgs memory) { assert(args.actionType == ActionType.Sell); return SellArgs({ amount: args.amount, account: accounts[args.accountId], takerMarket: args.primaryMarketId, makerMarket: args.secondaryMarketId, exchangeWrapper: args.otherAddress, orderData: args.data }); } function parseTradeArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (TradeArgs memory) { assert(args.actionType == ActionType.Trade); return TradeArgs({ amount: args.amount, takerAccount: accounts[args.accountId], makerAccount: accounts[args.otherAccountId], inputMarket: args.primaryMarketId, outputMarket: args.secondaryMarketId, autoTrader: args.otherAddress, tradeData: args.data }); } function parseLiquidateArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (LiquidateArgs memory) { assert(args.actionType == ActionType.Liquidate); return LiquidateArgs({ amount: args.amount, solidAccount: accounts[args.accountId], liquidAccount: accounts[args.otherAccountId], owedMarket: args.primaryMarketId, heldMarket: args.secondaryMarketId }); } function parseVaporizeArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (VaporizeArgs memory) { assert(args.actionType == ActionType.Vaporize); return VaporizeArgs({ amount: args.amount, solidAccount: accounts[args.accountId], vaporAccount: accounts[args.otherAccountId], owedMarket: args.primaryMarketId, heldMarket: args.secondaryMarketId }); } function parseCallArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (CallArgs memory) { assert(args.actionType == ActionType.Call); return CallArgs({ account: accounts[args.accountId], callee: args.otherAddress, data: args.data }); } } library Math { using SafeMath for uint256; // ============ Constants ============ bytes32 constant FILE = "Math"; // ============ Library Functions ============ /* * Return target * (numerator / denominator). */ function getPartial( uint256 target, uint256 numerator, uint256 denominator ) internal pure returns (uint256) { return target.mul(numerator).div(denominator); } /* * Return target * (numerator / denominator), but rounded up. */ function getPartialRoundUp( uint256 target, uint256 numerator, uint256 denominator ) internal pure returns (uint256) { if (target == 0 || numerator == 0) { // SafeMath will check for zero denominator return SafeMath.div(0, denominator); } return target.mul(numerator).sub(1).div(denominator).add(1); } function to128( uint256 number ) internal pure returns (uint128) { uint128 result = uint128(number); Require.that( result == number, FILE, "Unsafe cast to uint128" ); return result; } function to96( uint256 number ) internal pure returns (uint96) { uint96 result = uint96(number); Require.that( result == number, FILE, "Unsafe cast to uint96" ); return result; } function to32( uint256 number ) internal pure returns (uint32) { uint32 result = uint32(number); Require.that( result == number, FILE, "Unsafe cast to uint32" ); return result; } function min( uint256 a, uint256 b ) internal pure returns (uint256) { return a < b ? a : b; } function max( uint256 a, uint256 b ) internal pure returns (uint256) { return a > b ? a : b; } } library Require { // ============ Constants ============ uint256 constant ASCII_ZERO = 48; // '0' uint256 constant ASCII_RELATIVE_ZERO = 87; // 'a' - 10 uint256 constant ASCII_LOWER_EX = 120; // 'x' bytes2 constant COLON = 0x3a20; // ': ' bytes2 constant COMMA = 0x2c20; // ', ' bytes2 constant LPAREN = 0x203c; // ' <' byte constant RPAREN = 0x3e; // '>' uint256 constant FOUR_BIT_MASK = 0xf; // ============ Library Functions ============ function that( bool must, bytes32 file, bytes32 reason ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason) ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, uint256 payloadA ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), RPAREN ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, uint256 payloadA, uint256 payloadB ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), COMMA, stringify(payloadB), RPAREN ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, address payloadA ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), RPAREN ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, address payloadA, uint256 payloadB ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), COMMA, stringify(payloadB), RPAREN ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, address payloadA, uint256 payloadB, uint256 payloadC ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), COMMA, stringify(payloadB), COMMA, stringify(payloadC), RPAREN ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, bytes32 payloadA ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), RPAREN ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, bytes32 payloadA, uint256 payloadB, uint256 payloadC ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), COMMA, stringify(payloadB), COMMA, stringify(payloadC), RPAREN ) ) ); } } // ============ Private Functions ============ function stringifyTruncated( bytes32 input ) private pure returns (bytes memory) { // put the input bytes into the result bytes memory result = abi.encodePacked(input); // determine the length of the input by finding the location of the last non-zero byte for (uint256 i = 32; i > 0; ) { // reverse-for-loops with unsigned integer /* solium-disable-next-line security/no-modify-for-iter-var */ i--; // find the last non-zero byte in order to determine the length if (result[i] != 0) { uint256 length = i + 1; /* solium-disable-next-line security/no-inline-assembly */ assembly { mstore(result, length) // r.length = length; } return result; } } // all bytes are zero return new bytes(0); } function stringify( uint256 input ) private pure returns (bytes memory) { if (input == 0) { return "0"; } // get the final string length uint256 j = input; uint256 length; while (j != 0) { length++; j /= 10; } // allocate the string bytes memory bstr = new bytes(length); // populate the string starting with the least-significant character j = input; for (uint256 i = length; i > 0; ) { // reverse-for-loops with unsigned integer /* solium-disable-next-line security/no-modify-for-iter-var */ i--; // take last decimal digit bstr[i] = byte(uint8(ASCII_ZERO + (j % 10))); // remove the last decimal digit j /= 10; } return bstr; } function stringify( address input ) private pure returns (bytes memory) { uint256 z = uint256(input); // addresses are "0x" followed by 20 bytes of data which take up 2 characters each bytes memory result = new bytes(42); // populate the result with "0x" result[0] = byte(uint8(ASCII_ZERO)); result[1] = byte(uint8(ASCII_LOWER_EX)); // for each byte (starting from the lowest byte), populate the result with two characters for (uint256 i = 0; i < 20; i++) { // each byte takes two characters uint256 shift = i * 2; // populate the least-significant character result[41 - shift] = char(z & FOUR_BIT_MASK); z = z >> 4; // populate the most-significant character result[40 - shift] = char(z & FOUR_BIT_MASK); z = z >> 4; } return result; } function stringify( bytes32 input ) private pure returns (bytes memory) { uint256 z = uint256(input); // bytes32 are "0x" followed by 32 bytes of data which take up 2 characters each bytes memory result = new bytes(66); // populate the result with "0x" result[0] = byte(uint8(ASCII_ZERO)); result[1] = byte(uint8(ASCII_LOWER_EX)); // for each byte (starting from the lowest byte), populate the result with two characters for (uint256 i = 0; i < 32; i++) { // each byte takes two characters uint256 shift = i * 2; // populate the least-significant character result[65 - shift] = char(z & FOUR_BIT_MASK); z = z >> 4; // populate the most-significant character result[64 - shift] = char(z & FOUR_BIT_MASK); z = z >> 4; } return result; } function char( uint256 input ) private pure returns (byte) { // return ASCII digit (0-9) if (input < 10) { return byte(uint8(input + ASCII_ZERO)); } // return ASCII letter (a-f) return byte(uint8(input + ASCII_RELATIVE_ZERO)); } } library Types { using Math for uint256; // ============ AssetAmount ============ enum AssetDenomination { Wei, // the amount is denominated in wei Par // the amount is denominated in par } enum AssetReference { Delta, // the amount is given as a delta from the current value Target // the amount is given as an exact number to end up at } struct AssetAmount { bool sign; // true if positive AssetDenomination denomination; AssetReference ref; uint256 value; } // ============ Par (Principal Amount) ============ // Total borrow and supply values for a market struct TotalPar { uint128 borrow; uint128 supply; } // Individual principal amount for an account struct Par { bool sign; // true if positive uint128 value; } function zeroPar() internal pure returns (Par memory) { return Par({ sign: false, value: 0 }); } function sub( Par memory a, Par memory b ) internal pure returns (Par memory) { return add(a, negative(b)); } function add( Par memory a, Par memory b ) internal pure returns (Par memory) { Par memory result; if (a.sign == b.sign) { result.sign = a.sign; result.value = SafeMath.add(a.value, b.value).to128(); } else { if (a.value >= b.value) { result.sign = a.sign; result.value = SafeMath.sub(a.value, b.value).to128(); } else { result.sign = b.sign; result.value = SafeMath.sub(b.value, a.value).to128(); } } return result; } function equals( Par memory a, Par memory b ) internal pure returns (bool) { if (a.value == b.value) { if (a.value == 0) { return true; } return a.sign == b.sign; } return false; } function negative( Par memory a ) internal pure returns (Par memory) { return Par({ sign: !a.sign, value: a.value }); } function isNegative( Par memory a ) internal pure returns (bool) { return !a.sign && a.value > 0; } function isPositive( Par memory a ) internal pure returns (bool) { return a.sign && a.value > 0; } function isZero( Par memory a ) internal pure returns (bool) { return a.value == 0; } // ============ Wei (Token Amount) ============ // Individual token amount for an account struct Wei { bool sign; // true if positive uint256 value; } function zeroWei() internal pure returns (Wei memory) { return Wei({ sign: false, value: 0 }); } function sub( Wei memory a, Wei memory b ) internal pure returns (Wei memory) { return add(a, negative(b)); } function add( Wei memory a, Wei memory b ) internal pure returns (Wei memory) { Wei memory result; if (a.sign == b.sign) { result.sign = a.sign; result.value = SafeMath.add(a.value, b.value); } else { if (a.value >= b.value) { result.sign = a.sign; result.value = SafeMath.sub(a.value, b.value); } else { result.sign = b.sign; result.value = SafeMath.sub(b.value, a.value); } } return result; } function equals( Wei memory a, Wei memory b ) internal pure returns (bool) { if (a.value == b.value) { if (a.value == 0) { return true; } return a.sign == b.sign; } return false; } function negative( Wei memory a ) internal pure returns (Wei memory) { return Wei({ sign: !a.sign, value: a.value }); } function isNegative( Wei memory a ) internal pure returns (bool) { return !a.sign && a.value > 0; } function isPositive( Wei memory a ) internal pure returns (bool) { return a.sign && a.value > 0; } function isZero( Wei memory a ) internal pure returns (bool) { return a.value == 0; } } contract FulcrumSavingsProtocol is ProtocolInterface, DSAuth { address public constant NEW_IDAI_ADDRESS = 0x493C57C4763932315A328269E1ADaD09653B9081; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; address public savingsProxy; uint public decimals = 10 ** 18; function addSavingsProxy(address _savingsProxy) public auth { savingsProxy = _savingsProxy; } function deposit(address _user, uint _amount) public override { require(msg.sender == _user); // get dai from user require(ERC20(DAI_ADDRESS).transferFrom(_user, address(this), _amount)); // approve dai to Fulcrum ERC20(DAI_ADDRESS).approve(NEW_IDAI_ADDRESS, uint(-1)); // mint iDai ITokenInterface(NEW_IDAI_ADDRESS).mint(_user, _amount); } function withdraw(address _user, uint _amount) public override { require(msg.sender == _user); // transfer all users tokens to our contract require(ERC20(NEW_IDAI_ADDRESS).transferFrom(_user, address(this), ITokenInterface(NEW_IDAI_ADDRESS).balanceOf(_user))); // approve iDai to that contract ERC20(NEW_IDAI_ADDRESS).approve(NEW_IDAI_ADDRESS, uint(-1)); uint tokenPrice = ITokenInterface(NEW_IDAI_ADDRESS).tokenPrice(); // get dai from iDai contract ITokenInterface(NEW_IDAI_ADDRESS).burn(_user, _amount * decimals / tokenPrice); // return all remaining tokens back to user require(ERC20(NEW_IDAI_ADDRESS).transfer(_user, ITokenInterface(NEW_IDAI_ADDRESS).balanceOf(address(this)))); } } contract LoanShifterTaker is AdminAuth, ProxyPermission { ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; address public constant MANAGER_ADDRESS = 0x5ef30b9986345249bc32d8928B7ee64DE9435E39; Manager public constant manager = Manager(MANAGER_ADDRESS); ShifterRegistry public constant shifterRegistry = ShifterRegistry(0x597C52281b31B9d949a9D8fEbA08F7A2530a965e); enum Protocols { MCD, COMPOUND } enum SwapType { NO_SWAP, COLL_SWAP, DEBT_SWAP } struct LoanShiftData { Protocols fromProtocol; Protocols toProtocol; SwapType swapType; bool wholeDebt; uint collAmount; uint debtAmount; address debtAddr1; address debtAddr2; address addrLoan1; address addrLoan2; uint id1; uint id2; } /// @notice Main entry point, it will move or transform a loan /// @dev Called through DSProxy function moveLoan( SaverExchangeCore.ExchangeData memory _exchangeData, LoanShiftData memory _loanShift ) public { if (_isSameTypeVaults(_loanShift)) { _forkVault(_loanShift); return; } _callCloseAndOpen(_exchangeData, _loanShift); } //////////////////////// INTERNAL FUNCTIONS ////////////////////////// function _callCloseAndOpen( SaverExchangeCore.ExchangeData memory _exchangeData, LoanShiftData memory _loanShift ) internal { address protoAddr = shifterRegistry.getAddr(getNameByProtocol(uint8(_loanShift.fromProtocol))); uint loanAmount = _loanShift.debtAmount; if (_loanShift.wholeDebt) { loanAmount = ILoanShifter(protoAddr).getLoanAmount(_loanShift.id1, _loanShift.addrLoan1); } ( uint[8] memory numData, address[8] memory addrData, uint8[3] memory enumData, bytes memory callData ) = _packData(_loanShift, _exchangeData); // encode data bytes memory paramsData = abi.encode(numData, addrData, enumData, callData, address(this)); address payable loanShifterReceiverAddr = payable(shifterRegistry.getAddr("LOAN_SHIFTER_RECEIVER")); // call FL givePermission(loanShifterReceiverAddr); lendingPool.flashLoan(loanShifterReceiverAddr, getLoanAddr(_loanShift.debtAddr1, _loanShift.fromProtocol), loanAmount, paramsData); removePermission(loanShifterReceiverAddr); } function _forkVault(LoanShiftData memory _loanShift) internal { // Create new Vault to move to if (_loanShift.id2 == 0) { _loanShift.id2 = manager.open(manager.ilks(_loanShift.id1), address(this)); } if (_loanShift.wholeDebt) { manager.shift(_loanShift.id1, _loanShift.id2); } } function _isSameTypeVaults(LoanShiftData memory _loanShift) internal pure returns (bool) { return _loanShift.fromProtocol == Protocols.MCD && _loanShift.toProtocol == Protocols.MCD && _loanShift.addrLoan1 == _loanShift.addrLoan2; } function getNameByProtocol(uint8 _proto) internal pure returns (string memory) { if (_proto == 0) { return "MCD_SHIFTER"; } else if (_proto == 1) { return "COMP_SHIFTER"; } } function getLoanAddr(address _address, Protocols _fromProtocol) internal returns (address) { if (_fromProtocol == Protocols.COMPOUND) { return CTokenInterface(_address).underlying(); } else if (_fromProtocol == Protocols.MCD) { return DAI_ADDRESS; } else { return address(0); } } function _packData( LoanShiftData memory _loanShift, SaverExchangeCore.ExchangeData memory exchangeData ) internal pure returns (uint[8] memory numData, address[8] memory addrData, uint8[3] memory enumData, bytes memory callData) { numData = [ _loanShift.collAmount, _loanShift.debtAmount, _loanShift.id1, _loanShift.id2, exchangeData.srcAmount, exchangeData.destAmount, exchangeData.minPrice, exchangeData.price0x ]; addrData = [ _loanShift.addrLoan1, _loanShift.addrLoan2, _loanShift.debtAddr1, _loanShift.debtAddr2, exchangeData.srcAddr, exchangeData.destAddr, exchangeData.exchangeAddr, exchangeData.wrapper ]; enumData = [ uint8(_loanShift.fromProtocol), uint8(_loanShift.toProtocol), uint8(_loanShift.swapType) ]; callData = exchangeData.callData; } } contract ShifterRegistry is AdminAuth { mapping (string => address) public contractAddresses; bool public finalized; function changeContractAddr(string memory _contractName, address _protoAddr) public onlyOwner { require(!finalized); contractAddresses[_contractName] = _protoAddr; } function lock() public onlyOwner { finalized = true; } function getAddr(string memory _contractName) public view returns (address contractAddr) { contractAddr = contractAddresses[_contractName]; require(contractAddr != address(0), "No contract address registred"); } } library Address { function isContract(address account) internal view returns (bool) { // According to EIP-1052, 0x0 is the value returned for not-yet created accounts // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned // for accounts without code, i.e. `keccak256('')` bytes32 codehash; bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470; // solhint-disable-next-line no-inline-assembly assembly { codehash := extcodehash(account) } return (codehash != accountHash && codehash != 0x0); } function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return _functionCallWithValue(target, data, 0, errorMessage); } function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); return _functionCallWithValue(target, data, value, errorMessage); } function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) { require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: weiValue }(data); if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } contract BotRegistry is AdminAuth { mapping (address => bool) public botList; constructor() public { botList[0x776B4a13093e30B05781F97F6A4565B6aa8BE330] = true; botList[0xAED662abcC4FA3314985E67Ea993CAD064a7F5cF] = true; botList[0xa5d330F6619d6bF892A5B87D80272e1607b3e34D] = true; botList[0x5feB4DeE5150B589a7f567EA7CADa2759794A90A] = true; botList[0x7ca06417c1d6f480d3bB195B80692F95A6B66158] = true; } function setBot(address _botAddr, bool _state) public onlyOwner { botList[_botAddr] = _state; } } contract DFSProxy is Auth { string public constant NAME = "DFSProxy"; string public constant VERSION = "v0.1"; mapping(address => mapping(uint => bool)) public nonces; // --- EIP712 niceties --- bytes32 public DOMAIN_SEPARATOR; bytes32 public constant PERMIT_TYPEHASH = keccak256("callProxy(address _user,address _proxy,address _contract,bytes _txData,uint256 _nonce)"); constructor(uint256 chainId_) public { DOMAIN_SEPARATOR = keccak256(abi.encode( keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"), keccak256(bytes(NAME)), keccak256(bytes(VERSION)), chainId_, address(this) )); } function callProxy(address _user, address _proxy, address _contract, bytes calldata _txData, uint256 _nonce, uint8 _v, bytes32 _r, bytes32 _s) external payable onlyAuthorized { bytes32 digest = keccak256(abi.encodePacked( "\x19\x01", DOMAIN_SEPARATOR, keccak256(abi.encode(PERMIT_TYPEHASH, _user, _proxy, _contract, _txData, _nonce)) )); // user must be proxy owner require(DSProxyInterface(_proxy).owner() == _user); require(_user == ecrecover(digest, _v, _r, _s), "DFSProxy/user-not-valid"); require(!nonces[_user][_nonce], "DFSProxy/invalid-nonce"); nonces[_user][_nonce] = true; DSProxyInterface(_proxy).execute{value: msg.value}(_contract, _txData); } } contract DebugInfo { mapping (string => uint) public uintValues; mapping (string => address) public addrValues; mapping (string => string) public stringValues; mapping (string => bytes32) public bytes32Values; function logUint(string memory _id, uint _value) public { uintValues[_id] = _value; } function logAddr(string memory _id, address _value) public { addrValues[_id] = _value; } function logString(string memory _id, string memory _value) public { stringValues[_id] = _value; } function logBytes32(string memory _id, bytes32 _value) public { bytes32Values[_id] = _value; } } contract Discount { address public owner; mapping(address => CustomServiceFee) public serviceFees; uint256 constant MAX_SERVICE_FEE = 400; struct CustomServiceFee { bool active; uint256 amount; } constructor() public { owner = msg.sender; } function isCustomFeeSet(address _user) public view returns (bool) { return serviceFees[_user].active; } function getCustomServiceFee(address _user) public view returns (uint256) { return serviceFees[_user].amount; } function setServiceFee(address _user, uint256 _fee) public { require(msg.sender == owner, "Only owner"); require(_fee >= MAX_SERVICE_FEE || _fee == 0); serviceFees[_user] = CustomServiceFee({active: true, amount: _fee}); } function disableServiceFee(address _user) public { require(msg.sender == owner, "Only owner"); serviceFees[_user] = CustomServiceFee({active: false, amount: 0}); } } contract DydxFlashLoanBase { using SafeMath for uint256; address public constant SOLO_MARGIN_ADDRESS = 0x1E0447b19BB6EcFdAe1e4AE1694b0C3659614e4e; function _getMarketIdFromTokenAddress(address token) internal view returns (uint256) { return 0; } function _getRepaymentAmountInternal(uint256 amount) internal view returns (uint256) { // Needs to be overcollateralize // Needs to provide +2 wei to be safe return amount.add(2); } function _getAccountInfo() internal view returns (Account.Info memory) { return Account.Info({owner: address(this), number: 1}); } function _getWithdrawAction(uint marketId, uint256 amount, address contractAddr) internal view returns (Actions.ActionArgs memory) { return Actions.ActionArgs({ actionType: Actions.ActionType.Withdraw, accountId: 0, amount: Types.AssetAmount({ sign: false, denomination: Types.AssetDenomination.Wei, ref: Types.AssetReference.Delta, value: amount }), primaryMarketId: marketId, secondaryMarketId: 0, otherAddress: contractAddr, otherAccountId: 0, data: "" }); } function _getCallAction(bytes memory data, address contractAddr) internal view returns (Actions.ActionArgs memory) { return Actions.ActionArgs({ actionType: Actions.ActionType.Call, accountId: 0, amount: Types.AssetAmount({ sign: false, denomination: Types.AssetDenomination.Wei, ref: Types.AssetReference.Delta, value: 0 }), primaryMarketId: 0, secondaryMarketId: 0, otherAddress: contractAddr, otherAccountId: 0, data: data }); } function _getDepositAction(uint marketId, uint256 amount, address contractAddr) internal view returns (Actions.ActionArgs memory) { return Actions.ActionArgs({ actionType: Actions.ActionType.Deposit, accountId: 0, amount: Types.AssetAmount({ sign: true, denomination: Types.AssetDenomination.Wei, ref: Types.AssetReference.Delta, value: amount }), primaryMarketId: marketId, secondaryMarketId: 0, otherAddress: contractAddr, otherAccountId: 0, data: "" }); } } contract ExchangeDataParser { function decodeExchangeData( SaverExchangeCore.ExchangeData memory exchangeData ) internal pure returns (address[4] memory, uint[4] memory, bytes memory) { return ( [exchangeData.srcAddr, exchangeData.destAddr, exchangeData.exchangeAddr, exchangeData.wrapper], [exchangeData.srcAmount, exchangeData.destAmount, exchangeData.minPrice, exchangeData.price0x], exchangeData.callData ); } function encodeExchangeData( address[4] memory exAddr, uint[4] memory exNum, bytes memory callData ) internal pure returns (SaverExchangeCore.ExchangeData memory) { return SaverExchangeCore.ExchangeData({ srcAddr: exAddr[0], destAddr: exAddr[1], srcAmount: exNum[0], destAmount: exNum[1], minPrice: exNum[2], wrapper: exAddr[3], exchangeAddr: exAddr[2], callData: callData, price0x: exNum[3] }); } } interface IFlashLoanReceiver { function executeOperation(address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external; } abstract contract ILendingPoolAddressesProvider { function getLendingPool() public view virtual returns (address); function setLendingPoolImpl(address _pool) public virtual; function getLendingPoolCore() public virtual view returns (address payable); function setLendingPoolCoreImpl(address _lendingPoolCore) public virtual; function getLendingPoolConfigurator() public virtual view returns (address); function setLendingPoolConfiguratorImpl(address _configurator) public virtual; function getLendingPoolDataProvider() public virtual view returns (address); function setLendingPoolDataProviderImpl(address _provider) public virtual; function getLendingPoolParametersProvider() public virtual view returns (address); function setLendingPoolParametersProviderImpl(address _parametersProvider) public virtual; function getTokenDistributor() public virtual view returns (address); function setTokenDistributor(address _tokenDistributor) public virtual; function getFeeProvider() public virtual view returns (address); function setFeeProviderImpl(address _feeProvider) public virtual; function getLendingPoolLiquidationManager() public virtual view returns (address); function setLendingPoolLiquidationManager(address _manager) public virtual; function getLendingPoolManager() public virtual view returns (address); function setLendingPoolManager(address _lendingPoolManager) public virtual; function getPriceOracle() public virtual view returns (address); function setPriceOracle(address _priceOracle) public virtual; function getLendingRateOracle() public view virtual returns (address); function setLendingRateOracle(address _lendingRateOracle) public virtual; } library EthAddressLib { function ethAddress() internal pure returns(address) { return 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; } } abstract contract FlashLoanReceiverBase is IFlashLoanReceiver { using SafeERC20 for ERC20; using SafeMath for uint256; ILendingPoolAddressesProvider public addressesProvider; constructor(ILendingPoolAddressesProvider _provider) public { addressesProvider = _provider; } receive () external virtual payable {} function transferFundsBackToPoolInternal(address _reserve, uint256 _amount) internal { address payable core = addressesProvider.getLendingPoolCore(); transferInternal(core,_reserve, _amount); } function transferInternal(address payable _destination, address _reserve, uint256 _amount) internal { if(_reserve == EthAddressLib.ethAddress()) { //solium-disable-next-line _destination.call{value: _amount}(""); return; } ERC20(_reserve).safeTransfer(_destination, _amount); } function getBalanceInternal(address _target, address _reserve) internal view returns(uint256) { if(_reserve == EthAddressLib.ethAddress()) { return _target.balance; } return ERC20(_reserve).balanceOf(_target); } } contract GasBurner { // solhint-disable-next-line const-name-snakecase GasTokenInterface public constant gasToken = GasTokenInterface(0x0000000000b3F879cb30FE243b4Dfee438691c04); modifier burnGas(uint _amount) { if (gasToken.balanceOf(address(this)) >= _amount) { gasToken.free(_amount); } _; } } library SafeERC20 { using SafeMath for uint256; using Address for address; function safeTransfer(ERC20 token, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } function safeTransferFrom(ERC20 token, address from, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value)); } /** * @dev Deprecated. This function has issues similar to the ones found in * {IERC20-approve}, and its usage is discouraged. */ function safeApprove(ERC20 token, address spender, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value)); } function safeIncreaseAllowance(ERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).add(value); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } function safeDecreaseAllowance(ERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero"); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } function _callOptionalReturn(ERC20 token, bytes memory data) private { bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed"); if (returndata.length > 0) { // Return data is optional // solhint-disable-next-line max-line-length require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } } } library SafeMath { function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } contract ZrxAllowlist is AdminAuth { mapping (address => bool) public zrxAllowlist; mapping(address => bool) private nonPayableAddrs; constructor() public { zrxAllowlist[0x6958F5e95332D93D21af0D7B9Ca85B8212fEE0A5] = true; zrxAllowlist[0x61935CbDd02287B511119DDb11Aeb42F1593b7Ef] = true; zrxAllowlist[0xDef1C0ded9bec7F1a1670819833240f027b25EfF] = true; zrxAllowlist[0x080bf510FCbF18b91105470639e9561022937712] = true; nonPayableAddrs[0x080bf510FCbF18b91105470639e9561022937712] = true; } function setAllowlistAddr(address _zrxAddr, bool _state) public onlyOwner { zrxAllowlist[_zrxAddr] = _state; } function isZrxAddr(address _zrxAddr) public view returns (bool) { return zrxAllowlist[_zrxAddr]; } function addNonPayableAddr(address _nonPayableAddr) public onlyOwner { nonPayableAddrs[_nonPayableAddr] = true; } function removeNonPayableAddr(address _nonPayableAddr) public onlyOwner { nonPayableAddrs[_nonPayableAddr] = false; } function isNonPayableAddr(address _addr) public view returns(bool) { return nonPayableAddrs[_addr]; } } contract AaveBasicProxy is GasBurner { using SafeERC20 for ERC20; address public constant ETH_ADDR = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant AAVE_LENDING_POOL_ADDRESSES = 0x24a42fD28C976A61Df5D00D0599C34c4f90748c8; uint16 public constant AAVE_REFERRAL_CODE = 64; /// @notice User deposits tokens to the Aave protocol /// @dev User needs to approve the DSProxy to pull the _tokenAddr tokens /// @param _tokenAddr The address of the token to be deposited /// @param _amount Amount of tokens to be deposited function deposit(address _tokenAddr, uint256 _amount) public burnGas(5) payable { address lendingPoolCore = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); uint ethValue = _amount; if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(this), _amount); approveToken(_tokenAddr, lendingPoolCore); ethValue = 0; } ILendingPool(lendingPool).deposit{value: ethValue}(_tokenAddr, _amount, AAVE_REFERRAL_CODE); setUserUseReserveAsCollateralIfNeeded(_tokenAddr); } /// @notice User withdraws tokens from the Aave protocol /// @param _tokenAddr The address of the token to be withdrawn /// @param _aTokenAddr ATokens to be withdrawn /// @param _amount Amount of tokens to be withdrawn /// @param _wholeAmount If true we will take the whole amount on chain function withdraw(address _tokenAddr, address _aTokenAddr, uint256 _amount, bool _wholeAmount) public burnGas(8) { uint256 amount = _wholeAmount ? ERC20(_aTokenAddr).balanceOf(address(this)) : _amount; IAToken(_aTokenAddr).redeem(amount); withdrawTokens(_tokenAddr); } /// @notice User borrows tokens to the Aave protocol /// @param _tokenAddr The address of the token to be borrowed /// @param _amount Amount of tokens to be borrowed /// @param _type Send 1 for variable rate and 2 for fixed rate function borrow(address _tokenAddr, uint256 _amount, uint256 _type) public burnGas(8) { address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); ILendingPool(lendingPool).borrow(_tokenAddr, _amount, _type, AAVE_REFERRAL_CODE); withdrawTokens(_tokenAddr); } /// @dev User needs to approve the DSProxy to pull the _tokenAddr tokens /// @notice User paybacks tokens to the Aave protocol /// @param _tokenAddr The address of the token to be paybacked /// @param _aTokenAddr ATokens to be paybacked /// @param _amount Amount of tokens to be payed back /// @param _wholeDebt If true the _amount will be set to the whole amount of the debt function payback(address _tokenAddr, address _aTokenAddr, uint256 _amount, bool _wholeDebt) public burnGas(3) payable { address lendingPoolCore = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); uint256 amount = _amount; (,uint256 borrowAmount,,,,,uint256 originationFee,,,) = ILendingPool(lendingPool).getUserReserveData(_tokenAddr, address(this)); if (_wholeDebt) { amount = borrowAmount; } amount += originationFee; if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(this), amount); approveToken(_tokenAddr, lendingPoolCore); } ILendingPool(lendingPool).repay{value: msg.value}(_tokenAddr, amount, payable(address(this))); withdrawTokens(_tokenAddr); } /// @dev User needs to approve the DSProxy to pull the _tokenAddr tokens /// @notice User paybacks tokens to the Aave protocol /// @param _tokenAddr The address of the token to be paybacked /// @param _aTokenAddr ATokens to be paybacked /// @param _amount Amount of tokens to be payed back /// @param _wholeDebt If true the _amount will be set to the whole amount of the debt function paybackOnBehalf(address _tokenAddr, address _aTokenAddr, uint256 _amount, bool _wholeDebt, address payable _onBehalf) public burnGas(3) payable { address lendingPoolCore = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); uint256 amount = _amount; (,uint256 borrowAmount,,,,,uint256 originationFee,,,) = ILendingPool(lendingPool).getUserReserveData(_tokenAddr, _onBehalf); if (_wholeDebt) { amount = borrowAmount; } amount += originationFee; if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(this), amount); approveToken(_tokenAddr, lendingPoolCore); } ILendingPool(lendingPool).repay{value: msg.value}(_tokenAddr, amount, _onBehalf); withdrawTokens(_tokenAddr); } /// @notice Helper method to withdraw tokens from the DSProxy /// @param _tokenAddr Address of the token to be withdrawn function withdrawTokens(address _tokenAddr) public { uint256 amount = _tokenAddr == ETH_ADDR ? address(this).balance : ERC20(_tokenAddr).balanceOf(address(this)); if (amount > 0) { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransfer(msg.sender, amount); } else { msg.sender.transfer(amount); } } } /// @notice Approves token contract to pull underlying tokens from the DSProxy /// @param _tokenAddr Token we are trying to approve /// @param _caller Address which will gain the approval function approveToken(address _tokenAddr, address _caller) internal { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeApprove(_caller, 0); ERC20(_tokenAddr).safeApprove(_caller, uint256(-1)); } } function setUserUseReserveAsCollateralIfNeeded(address _tokenAddr) public { address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); (,,,,,,,,,bool collateralEnabled) = ILendingPool(lendingPool).getUserReserveData(_tokenAddr, address(this)); if (!collateralEnabled) { ILendingPool(lendingPool).setUserUseReserveAsCollateral(_tokenAddr, true); } } function setUserUseReserveAsCollateral(address _tokenAddr, bool _true) public { address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); ILendingPool(lendingPool).setUserUseReserveAsCollateral(_tokenAddr, _true); } function swapBorrowRateMode(address _reserve) public { address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); ILendingPool(lendingPool).swapBorrowRateMode(_reserve); } } contract AaveLoanInfo is AaveSafetyRatio { struct LoanData { address user; uint128 ratio; address[] collAddr; address[] borrowAddr; uint256[] collAmounts; uint256[] borrowAmounts; } struct TokenInfo { address aTokenAddress; address underlyingTokenAddress; uint256 collateralFactor; uint256 price; } struct TokenInfoFull { address aTokenAddress; address underlyingTokenAddress; uint256 supplyRate; uint256 borrowRate; uint256 totalSupply; uint256 availableLiquidity; uint256 totalBorrow; uint256 collateralFactor; uint256 price; bool usageAsCollateralEnabled; } /// @notice Calcualted the ratio of coll/debt for a compound user /// @param _user Address of the user function getRatio(address _user) public view returns (uint256) { // For each asset the account is in return getSafetyRatio(_user); } /// @notice Fetches Aave prices for tokens /// @param _tokens Arr. of tokens for which to get the prices /// @return prices Array of prices function getPrices(address[] memory _tokens) public view returns (uint256[] memory prices) { address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); prices = new uint[](_tokens.length); for (uint256 i = 0; i < _tokens.length; ++i) { prices[i] = IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_tokens[i]); } } /// @notice Fetches Aave collateral factors for tokens /// @param _tokens Arr. of tokens for which to get the coll. factors /// @return collFactors Array of coll. factors function getCollFactors(address[] memory _tokens) public view returns (uint256[] memory collFactors) { address lendingPoolCoreAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); collFactors = new uint256[](_tokens.length); for (uint256 i = 0; i < _tokens.length; ++i) { (,collFactors[i],,) = ILendingPool(lendingPoolCoreAddress).getReserveConfiguration(_tokens[i]); } } function getTokenBalances(address _user, address[] memory _tokens) public view returns (uint256[] memory balances, uint256[] memory borrows, bool[] memory enabledAsCollateral) { address lendingPoolAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); balances = new uint256[](_tokens.length); borrows = new uint256[](_tokens.length); enabledAsCollateral = new bool[](_tokens.length); for (uint256 i = 0; i < _tokens.length; i++) { address asset = _tokens[i]; (balances[i], borrows[i],,,,,,,,enabledAsCollateral[i]) = ILendingPool(lendingPoolAddress).getUserReserveData(asset, _user); } } /// @notice Calcualted the ratio of coll/debt for an aave user /// @param _users Addresses of the user /// @return ratios Array of ratios function getRatios(address[] memory _users) public view returns (uint256[] memory ratios) { ratios = new uint256[](_users.length); for (uint256 i = 0; i < _users.length; ++i) { ratios[i] = getSafetyRatio(_users[i]); } } /// @notice Information about reserves /// @param _tokenAddresses Array of tokens addresses /// @return tokens Array of reserves infomartion function getTokensInfo(address[] memory _tokenAddresses) public view returns(TokenInfo[] memory tokens) { address lendingPoolCoreAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); tokens = new TokenInfo[](_tokenAddresses.length); for (uint256 i = 0; i < _tokenAddresses.length; ++i) { (,uint256 ltv,,) = ILendingPool(lendingPoolCoreAddress).getReserveConfiguration(_tokenAddresses[i]); tokens[i] = TokenInfo({ aTokenAddress: ILendingPool(lendingPoolCoreAddress).getReserveATokenAddress(_tokenAddresses[i]), underlyingTokenAddress: _tokenAddresses[i], collateralFactor: ltv, price: IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_tokenAddresses[i]) }); } } /// @notice Information about reserves /// @param _tokenAddresses Array of token addresses /// @return tokens Array of reserves infomartion function getFullTokensInfo(address[] memory _tokenAddresses) public view returns(TokenInfoFull[] memory tokens) { address lendingPoolCoreAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); tokens = new TokenInfoFull[](_tokenAddresses.length); for (uint256 i = 0; i < _tokenAddresses.length; ++i) { (,uint256 ltv,,bool usageAsCollateralEnabled) = ILendingPool(lendingPoolCoreAddress).getReserveConfiguration(_tokenAddresses[i]); tokens[i] = TokenInfoFull({ aTokenAddress: ILendingPool(lendingPoolCoreAddress).getReserveATokenAddress(_tokenAddresses[i]), underlyingTokenAddress: _tokenAddresses[i], supplyRate: ILendingPool(lendingPoolCoreAddress).getReserveCurrentLiquidityRate(_tokenAddresses[i]), borrowRate: ILendingPool(lendingPoolCoreAddress).getReserveCurrentVariableBorrowRate(_tokenAddresses[i]), totalSupply: ILendingPool(lendingPoolCoreAddress).getReserveTotalLiquidity(_tokenAddresses[i]), availableLiquidity: ILendingPool(lendingPoolCoreAddress).getReserveAvailableLiquidity(_tokenAddresses[i]), totalBorrow: ILendingPool(lendingPoolCoreAddress).getReserveTotalBorrowsVariable(_tokenAddresses[i]), collateralFactor: ltv, price: IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_tokenAddresses[i]), usageAsCollateralEnabled: usageAsCollateralEnabled }); } } /// @notice Fetches all the collateral/debt address and amounts, denominated in ether /// @param _user Address of the user /// @return data LoanData information function getLoanData(address _user) public view returns (LoanData memory data) { address lendingPoolAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); address[] memory reserves = ILendingPool(lendingPoolAddress).getReserves(); data = LoanData({ user: _user, ratio: 0, collAddr: new address[](reserves.length), borrowAddr: new address[](reserves.length), collAmounts: new uint[](reserves.length), borrowAmounts: new uint[](reserves.length) }); uint64 collPos = 0; uint64 borrowPos = 0; for (uint64 i = 0; i < reserves.length; i++) { address reserve = reserves[i]; (uint256 aTokenBalance, uint256 borrowBalance,,,,,,,,) = ILendingPool(lendingPoolAddress).getUserReserveData(reserve, _user); uint256 price = IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(reserves[i]); if (aTokenBalance > 0) { uint256 userTokenBalanceEth = wmul(aTokenBalance, price) * (10 ** (18 - _getDecimals(reserve))); data.collAddr[collPos] = reserve; data.collAmounts[collPos] = userTokenBalanceEth; collPos++; } // Sum up debt in Eth if (borrowBalance > 0) { uint256 userBorrowBalanceEth = wmul(borrowBalance, price) * (10 ** (18 - _getDecimals(reserve))); data.borrowAddr[borrowPos] = reserve; data.borrowAmounts[borrowPos] = userBorrowBalanceEth; borrowPos++; } } data.ratio = uint128(getSafetyRatio(_user)); return data; } /// @notice Fetches all the collateral/debt address and amounts, denominated in ether /// @param _users Addresses of the user /// @return loans Array of LoanData information function getLoanDataArr(address[] memory _users) public view returns (LoanData[] memory loans) { loans = new LoanData[](_users.length); for (uint i = 0; i < _users.length; ++i) { loans[i] = getLoanData(_users[i]); } } } contract AaveMonitor is AdminAuth, DSMath, AaveSafetyRatio, GasBurner { using SafeERC20 for ERC20; enum Method { Boost, Repay } uint public REPAY_GAS_TOKEN = 19; uint public BOOST_GAS_TOKEN = 19; uint public MAX_GAS_PRICE = 200000000000; // 200 gwei uint public REPAY_GAS_COST = 2500000; uint public BOOST_GAS_COST = 2500000; address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; AaveMonitorProxy public aaveMonitorProxy; AaveSubscriptions public subscriptionsContract; address public aaveSaverProxy; DefisaverLogger public logger = DefisaverLogger(DEFISAVER_LOGGER); modifier onlyApproved() { require(BotRegistry(BOT_REGISTRY_ADDRESS).botList(msg.sender), "Not auth bot"); _; } /// @param _aaveMonitorProxy Proxy contracts that actually is authorized to call DSProxy /// @param _subscriptions Subscriptions contract for Aave positions /// @param _aaveSaverProxy Contract that actually performs Repay/Boost constructor(address _aaveMonitorProxy, address _subscriptions, address _aaveSaverProxy) public { aaveMonitorProxy = AaveMonitorProxy(_aaveMonitorProxy); subscriptionsContract = AaveSubscriptions(_subscriptions); aaveSaverProxy = _aaveSaverProxy; } /// @notice Bots call this method to repay for user when conditions are met /// @dev If the contract ownes gas token it will try and use it for gas price reduction /// @param _exData Exchange data /// @param _user The actual address that owns the Aave position function repayFor( SaverExchangeCore.ExchangeData memory _exData, address _user ) public payable onlyApproved burnGas(REPAY_GAS_TOKEN) { (bool isAllowed, uint ratioBefore) = canCall(Method.Repay, _user); require(isAllowed); // check if conditions are met uint256 gasCost = calcGasCost(REPAY_GAS_COST); aaveMonitorProxy.callExecute{value: msg.value}( _user, aaveSaverProxy, abi.encodeWithSignature( "repay((address,address,uint256,uint256,uint256,address,address,bytes,uint256),uint256)", _exData, gasCost ) ); (bool isGoodRatio, uint ratioAfter) = ratioGoodAfter(Method.Repay, _user); require(isGoodRatio); // check if the after result of the actions is good returnEth(); logger.Log(address(this), _user, "AutomaticAaveRepay", abi.encode(ratioBefore, ratioAfter)); } /// @notice Bots call this method to boost for user when conditions are met /// @dev If the contract ownes gas token it will try and use it for gas price reduction /// @param _exData Exchange data /// @param _user The actual address that owns the Aave position function boostFor( SaverExchangeCore.ExchangeData memory _exData, address _user ) public payable onlyApproved burnGas(BOOST_GAS_TOKEN) { (bool isAllowed, uint ratioBefore) = canCall(Method.Boost, _user); require(isAllowed); // check if conditions are met uint256 gasCost = calcGasCost(BOOST_GAS_COST); aaveMonitorProxy.callExecute{value: msg.value}( _user, aaveSaverProxy, abi.encodeWithSignature( "boost((address,address,uint256,uint256,uint256,address,address,bytes,uint256),uint256)", _exData, gasCost ) ); (bool isGoodRatio, uint ratioAfter) = ratioGoodAfter(Method.Boost, _user); require(isGoodRatio); // check if the after result of the actions is good returnEth(); logger.Log(address(this), _user, "AutomaticAaveBoost", abi.encode(ratioBefore, ratioAfter)); } /******************* INTERNAL METHODS ********************************/ function returnEth() internal { // return if some eth left if (address(this).balance > 0) { msg.sender.transfer(address(this).balance); } } /******************* STATIC METHODS ********************************/ /// @notice Checks if Boost/Repay could be triggered for the CDP /// @dev Called by AaveMonitor to enforce the min/max check /// @param _method Type of action to be called /// @param _user The actual address that owns the Aave position /// @return Boolean if it can be called and the ratio function canCall(Method _method, address _user) public view returns(bool, uint) { bool subscribed = subscriptionsContract.isSubscribed(_user); AaveSubscriptions.AaveHolder memory holder = subscriptionsContract.getHolder(_user); // check if cdp is subscribed if (!subscribed) return (false, 0); // check if boost and boost allowed if (_method == Method.Boost && !holder.boostEnabled) return (false, 0); uint currRatio = getSafetyRatio(_user); if (_method == Method.Repay) { return (currRatio < holder.minRatio, currRatio); } else if (_method == Method.Boost) { return (currRatio > holder.maxRatio, currRatio); } } /// @dev After the Boost/Repay check if the ratio doesn't trigger another call /// @param _method Type of action to be called /// @param _user The actual address that owns the Aave position /// @return Boolean if the recent action preformed correctly and the ratio function ratioGoodAfter(Method _method, address _user) public view returns(bool, uint) { AaveSubscriptions.AaveHolder memory holder; holder= subscriptionsContract.getHolder(_user); uint currRatio = getSafetyRatio(_user); if (_method == Method.Repay) { return (currRatio < holder.maxRatio, currRatio); } else if (_method == Method.Boost) { return (currRatio > holder.minRatio, currRatio); } } /// @notice Calculates gas cost (in Eth) of tx /// @dev Gas price is limited to MAX_GAS_PRICE to prevent attack of draining user CDP /// @param _gasAmount Amount of gas used for the tx function calcGasCost(uint _gasAmount) public view returns (uint) { uint gasPrice = tx.gasprice <= MAX_GAS_PRICE ? tx.gasprice : MAX_GAS_PRICE; return mul(gasPrice, _gasAmount); } /******************* OWNER ONLY OPERATIONS ********************************/ /// @notice Allows owner to change gas cost for boost operation, but only up to 3 millions /// @param _gasCost New gas cost for boost method function changeBoostGasCost(uint _gasCost) public onlyOwner { require(_gasCost < 3000000); BOOST_GAS_COST = _gasCost; } /// @notice Allows owner to change gas cost for repay operation, but only up to 3 millions /// @param _gasCost New gas cost for repay method function changeRepayGasCost(uint _gasCost) public onlyOwner { require(_gasCost < 3000000); REPAY_GAS_COST = _gasCost; } /// @notice Allows owner to change max gas price /// @param _maxGasPrice New max gas price function changeMaxGasPrice(uint _maxGasPrice) public onlyOwner { require(_maxGasPrice < 500000000000); MAX_GAS_PRICE = _maxGasPrice; } /// @notice Allows owner to change gas token amount /// @param _gasTokenAmount New gas token amount /// @param _repay true if repay gas token, false if boost gas token function changeGasTokenAmount(uint _gasTokenAmount, bool _repay) public onlyOwner { if (_repay) { REPAY_GAS_TOKEN = _gasTokenAmount; } else { BOOST_GAS_TOKEN = _gasTokenAmount; } } } contract AaveMonitorProxy is AdminAuth { using SafeERC20 for ERC20; uint public CHANGE_PERIOD; address public monitor; address public newMonitor; address public lastMonitor; uint public changeRequestedTimestamp; mapping(address => bool) public allowed; event MonitorChangeInitiated(address oldMonitor, address newMonitor); event MonitorChangeCanceled(); event MonitorChangeFinished(address monitor); event MonitorChangeReverted(address monitor); // if someone who is allowed become malicious, owner can't be changed modifier onlyAllowed() { require(allowed[msg.sender] || msg.sender == owner); _; } modifier onlyMonitor() { require (msg.sender == monitor); _; } constructor(uint _changePeriod) public { CHANGE_PERIOD = _changePeriod * 1 days; } /// @notice Only monitor contract is able to call execute on users proxy /// @param _owner Address of cdp owner (users DSProxy address) /// @param _aaveSaverProxy Address of AaveSaverProxy /// @param _data Data to send to AaveSaverProxy function callExecute(address _owner, address _aaveSaverProxy, bytes memory _data) public payable onlyMonitor { // execute reverts if calling specific method fails DSProxyInterface(_owner).execute{value: msg.value}(_aaveSaverProxy, _data); // return if anything left if (address(this).balance > 0) { msg.sender.transfer(address(this).balance); } } /// @notice Allowed users are able to set Monitor contract without any waiting period first time /// @param _monitor Address of Monitor contract function setMonitor(address _monitor) public onlyAllowed { require(monitor == address(0)); monitor = _monitor; } /// @notice Allowed users are able to start procedure for changing monitor /// @dev after CHANGE_PERIOD needs to call confirmNewMonitor to actually make a change /// @param _newMonitor address of new monitor function changeMonitor(address _newMonitor) public onlyAllowed { require(changeRequestedTimestamp == 0); changeRequestedTimestamp = now; lastMonitor = monitor; newMonitor = _newMonitor; emit MonitorChangeInitiated(lastMonitor, newMonitor); } /// @notice At any point allowed users are able to cancel monitor change function cancelMonitorChange() public onlyAllowed { require(changeRequestedTimestamp > 0); changeRequestedTimestamp = 0; newMonitor = address(0); emit MonitorChangeCanceled(); } /// @notice Anyone is able to confirm new monitor after CHANGE_PERIOD if process is started function confirmNewMonitor() public onlyAllowed { require((changeRequestedTimestamp + CHANGE_PERIOD) < now); require(changeRequestedTimestamp != 0); require(newMonitor != address(0)); monitor = newMonitor; newMonitor = address(0); changeRequestedTimestamp = 0; emit MonitorChangeFinished(monitor); } /// @notice Its possible to revert monitor to last used monitor function revertMonitor() public onlyAllowed { require(lastMonitor != address(0)); monitor = lastMonitor; emit MonitorChangeReverted(monitor); } /// @notice Allowed users are able to add new allowed user /// @param _user Address of user that will be allowed function addAllowed(address _user) public onlyAllowed { allowed[_user] = true; } /// @notice Allowed users are able to remove allowed user /// @dev owner is always allowed even if someone tries to remove it from allowed mapping /// @param _user Address of allowed user function removeAllowed(address _user) public onlyAllowed { allowed[_user] = false; } function setChangePeriod(uint _periodInDays) public onlyAllowed { require(_periodInDays * 1 days > CHANGE_PERIOD); CHANGE_PERIOD = _periodInDays * 1 days; } /// @notice In case something is left in contract, owner is able to withdraw it /// @param _token address of token to withdraw balance function withdrawToken(address _token) public onlyOwner { uint balance = ERC20(_token).balanceOf(address(this)); ERC20(_token).safeTransfer(msg.sender, balance); } /// @notice In case something is left in contract, owner is able to withdraw it function withdrawEth() public onlyOwner { uint balance = address(this).balance; msg.sender.transfer(balance); } } contract AaveSubscriptions is AdminAuth { struct AaveHolder { address user; uint128 minRatio; uint128 maxRatio; uint128 optimalRatioBoost; uint128 optimalRatioRepay; bool boostEnabled; } struct SubPosition { uint arrPos; bool subscribed; } AaveHolder[] public subscribers; mapping (address => SubPosition) public subscribersPos; uint public changeIndex; event Subscribed(address indexed user); event Unsubscribed(address indexed user); event Updated(address indexed user); event ParamUpdates(address indexed user, uint128, uint128, uint128, uint128, bool); /// @dev Called by the DSProxy contract which owns the Aave position /// @notice Adds the users Aave poistion in the list of subscriptions so it can be monitored /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalBoost Ratio amount which boost should target /// @param _optimalRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled function subscribe(uint128 _minRatio, uint128 _maxRatio, uint128 _optimalBoost, uint128 _optimalRepay, bool _boostEnabled) external { // if boost is not enabled, set max ratio to max uint uint128 localMaxRatio = _boostEnabled ? _maxRatio : uint128(-1); require(checkParams(_minRatio, localMaxRatio), "Must be correct params"); SubPosition storage subInfo = subscribersPos[msg.sender]; AaveHolder memory subscription = AaveHolder({ minRatio: _minRatio, maxRatio: localMaxRatio, optimalRatioBoost: _optimalBoost, optimalRatioRepay: _optimalRepay, user: msg.sender, boostEnabled: _boostEnabled }); changeIndex++; if (subInfo.subscribed) { subscribers[subInfo.arrPos] = subscription; emit Updated(msg.sender); emit ParamUpdates(msg.sender, _minRatio, localMaxRatio, _optimalBoost, _optimalRepay, _boostEnabled); } else { subscribers.push(subscription); subInfo.arrPos = subscribers.length - 1; subInfo.subscribed = true; emit Subscribed(msg.sender); } } /// @notice Called by the users DSProxy /// @dev Owner who subscribed cancels his subscription function unsubscribe() external { _unsubscribe(msg.sender); } /// @dev Checks limit if minRatio is bigger than max /// @param _minRatio Minimum ratio, bellow which repay can be triggered /// @param _maxRatio Maximum ratio, over which boost can be triggered /// @return Returns bool if the params are correct function checkParams(uint128 _minRatio, uint128 _maxRatio) internal pure returns (bool) { if (_minRatio > _maxRatio) { return false; } return true; } /// @dev Internal method to remove a subscriber from the list /// @param _user The actual address that owns the Aave position function _unsubscribe(address _user) internal { require(subscribers.length > 0, "Must have subscribers in the list"); SubPosition storage subInfo = subscribersPos[_user]; require(subInfo.subscribed, "Must first be subscribed"); address lastOwner = subscribers[subscribers.length - 1].user; SubPosition storage subInfo2 = subscribersPos[lastOwner]; subInfo2.arrPos = subInfo.arrPos; subscribers[subInfo.arrPos] = subscribers[subscribers.length - 1]; subscribers.pop(); // remove last element and reduce arr length changeIndex++; subInfo.subscribed = false; subInfo.arrPos = 0; emit Unsubscribed(msg.sender); } /// @dev Checks if the user is subscribed /// @param _user The actual address that owns the Aave position /// @return If the user is subscribed function isSubscribed(address _user) public view returns (bool) { SubPosition storage subInfo = subscribersPos[_user]; return subInfo.subscribed; } /// @dev Returns subscribtion information about a user /// @param _user The actual address that owns the Aave position /// @return Subscription information about the user if exists function getHolder(address _user) public view returns (AaveHolder memory) { SubPosition storage subInfo = subscribersPos[_user]; return subscribers[subInfo.arrPos]; } /// @notice Helper method to return all the subscribed CDPs /// @return List of all subscribers function getSubscribers() public view returns (AaveHolder[] memory) { return subscribers; } /// @notice Helper method for the frontend, returns all the subscribed CDPs paginated /// @param _page What page of subscribers you want /// @param _perPage Number of entries per page /// @return List of all subscribers for that page function getSubscribersByPage(uint _page, uint _perPage) public view returns (AaveHolder[] memory) { AaveHolder[] memory holders = new AaveHolder[](_perPage); uint start = _page * _perPage; uint end = start + _perPage; end = (end > holders.length) ? holders.length : end; uint count = 0; for (uint i = start; i < end; i++) { holders[count] = subscribers[i]; count++; } return holders; } ////////////// ADMIN METHODS /////////////////// /// @notice Admin function to unsubscribe a position /// @param _user The actual address that owns the Aave position function unsubscribeByAdmin(address _user) public onlyOwner { SubPosition storage subInfo = subscribersPos[_user]; if (subInfo.subscribed) { _unsubscribe(_user); } } } contract AaveSubscriptionsProxy is ProxyPermission { address public constant AAVE_SUBSCRIPTION_ADDRESS = 0xe08ff7A2BADb634F0b581E675E6B3e583De086FC; address public constant AAVE_MONITOR_PROXY = 0xfA560Dba3a8D0B197cA9505A2B98120DD89209AC; /// @notice Calls subscription contract and creates a DSGuard if non existent /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalRatioBoost Ratio amount which boost should target /// @param _optimalRatioRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled function subscribe( uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled ) public { givePermission(AAVE_MONITOR_PROXY); IAaveSubscription(AAVE_SUBSCRIPTION_ADDRESS).subscribe( _minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled); } /// @notice Calls subscription contract and updated existing parameters /// @dev If subscription is non existent this will create one /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalRatioBoost Ratio amount which boost should target /// @param _optimalRatioRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled function update( uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled ) public { IAaveSubscription(AAVE_SUBSCRIPTION_ADDRESS).subscribe(_minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled); } /// @notice Calls the subscription contract to unsubscribe the caller function unsubscribe() public { removePermission(AAVE_MONITOR_PROXY); IAaveSubscription(AAVE_SUBSCRIPTION_ADDRESS).unsubscribe(); } } contract AaveImport is AaveHelper, AdminAuth { using SafeERC20 for ERC20; address public constant WETH_ADDRESS = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address public constant BASIC_PROXY = 0x0e49911C937357EAA5a56984483b4B8918D0493b; address public constant AETH_ADDRESS = 0x3a3A65aAb0dd2A17E3F1947bA16138cd37d08c04; function callFunction( address sender, Account.Info memory account, bytes memory data ) public { ( address collateralToken, address borrowToken, uint256 ethAmount, address user, address proxy ) = abi.decode(data, (address,address,uint256,address,address)); // withdraw eth TokenInterface(WETH_ADDRESS).withdraw(ethAmount); address lendingPoolCoreAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); address aCollateralToken = ILendingPool(lendingPoolCoreAddress).getReserveATokenAddress(collateralToken); address aBorrowToken = ILendingPool(lendingPoolCoreAddress).getReserveATokenAddress(borrowToken); // deposit eth on behalf of proxy DSProxy(payable(proxy)).execute{value: ethAmount}(BASIC_PROXY, abi.encodeWithSignature("deposit(address,uint256)", ETH_ADDR, ethAmount)); // borrow needed amount to repay users borrow (,uint256 borrowAmount,,uint256 borrowRateMode,,,uint256 originationFee,,,) = ILendingPool(lendingPool).getUserReserveData(borrowToken, user); borrowAmount += originationFee; DSProxy(payable(proxy)).execute(BASIC_PROXY, abi.encodeWithSignature("borrow(address,uint256,uint256)", borrowToken, borrowAmount, borrowRateMode)); // payback on behalf of user ERC20(borrowToken).safeApprove(proxy, borrowAmount); DSProxy(payable(proxy)).execute(BASIC_PROXY, abi.encodeWithSignature("paybackOnBehalf(address,address,uint256,bool,address)", borrowToken, aBorrowToken, 0, true, user)); // pull tokens from user to proxy ERC20(aCollateralToken).safeTransferFrom(user, proxy, ERC20(aCollateralToken).balanceOf(user)); // enable as collateral DSProxy(payable(proxy)).execute(BASIC_PROXY, abi.encodeWithSignature("setUserUseReserveAsCollateralIfNeeded(address)", collateralToken)); // withdraw deposited eth DSProxy(payable(proxy)).execute(BASIC_PROXY, abi.encodeWithSignature("withdraw(address,address,uint256,bool)", ETH_ADDR, AETH_ADDRESS, ethAmount, false)); // deposit eth, get weth and return to sender TokenInterface(WETH_ADDRESS).deposit.value(address(this).balance)(); ERC20(WETH_ADDRESS).safeTransfer(proxy, ethAmount+2); } /// @dev if contract receive eth, convert it to WETH receive() external payable { // deposit eth and get weth if (msg.sender == owner) { TokenInterface(WETH_ADDRESS).deposit.value(address(this).balance)(); } } } contract AaveImportTaker is DydxFlashLoanBase, ProxyPermission { address public constant WETH_ADDR = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address payable public constant AAVE_IMPORT = 0x2f8ADA783E0696F610e5637CF873B967f47dF2E3; address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; address public constant PROXY_REGISTRY_ADDRESS = 0x4678f0a6958e4D2Bc4F1BAF7Bc52E8F3564f3fE4; /// @notice Starts the process to move users position 1 collateral and 1 borrow /// @dev User must send 2 wei with this transaction /// @dev User must approve AaveImport to pull _aCollateralToken /// @param _collateralToken Collateral token we are moving to DSProxy /// @param _borrowToken Borrow token we are moving to DSProxy /// @param _ethAmount ETH amount that needs to be pulled from dydx function importLoan(address _collateralToken, address _borrowToken, uint _ethAmount) public { ISoloMargin solo = ISoloMargin(SOLO_MARGIN_ADDRESS); // Get marketId from token address uint256 marketId = _getMarketIdFromTokenAddress(WETH_ADDR); // Calculate repay amount (_amount + (2 wei)) // Approve transfer from uint256 repayAmount = _getRepaymentAmountInternal(_ethAmount); ERC20(WETH_ADDR).approve(SOLO_MARGIN_ADDRESS, repayAmount); Actions.ActionArgs[] memory operations = new Actions.ActionArgs[](3); operations[0] = _getWithdrawAction(marketId, _ethAmount, AAVE_IMPORT); operations[1] = _getCallAction( abi.encode(_collateralToken, _borrowToken, _ethAmount, msg.sender, address(this)), AAVE_IMPORT ); operations[2] = _getDepositAction(marketId, repayAmount, address(this)); Account.Info[] memory accountInfos = new Account.Info[](1); accountInfos[0] = _getAccountInfo(); givePermission(AAVE_IMPORT); solo.operate(accountInfos, operations); removePermission(AAVE_IMPORT); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "AaveImport", abi.encode(_collateralToken, _borrowToken)); } } contract CompoundBasicProxy is GasBurner { address public constant ETH_ADDR = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant COMPTROLLER_ADDR = 0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B; using SafeERC20 for ERC20; /// @notice User deposits tokens to the Compound protocol /// @dev User needs to approve the DSProxy to pull the _tokenAddr tokens /// @param _tokenAddr The address of the token to be deposited /// @param _cTokenAddr CTokens to be deposited /// @param _amount Amount of tokens to be deposited /// @param _inMarket True if the token is already in market for that address function deposit(address _tokenAddr, address _cTokenAddr, uint _amount, bool _inMarket) public burnGas(5) payable { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(this), _amount); } approveToken(_tokenAddr, _cTokenAddr); if (!_inMarket) { enterMarket(_cTokenAddr); } if (_tokenAddr != ETH_ADDR) { require(CTokenInterface(_cTokenAddr).mint(_amount) == 0); } else { CEtherInterface(_cTokenAddr).mint{value: msg.value}(); // reverts on fail } } /// @notice User withdraws tokens to the Compound protocol /// @param _tokenAddr The address of the token to be withdrawn /// @param _cTokenAddr CTokens to be withdrawn /// @param _amount Amount of tokens to be withdrawn /// @param _isCAmount If true _amount is cTokens if falls _amount is underlying tokens function withdraw(address _tokenAddr, address _cTokenAddr, uint _amount, bool _isCAmount) public burnGas(5) { if (_isCAmount) { require(CTokenInterface(_cTokenAddr).redeem(_amount) == 0); } else { require(CTokenInterface(_cTokenAddr).redeemUnderlying(_amount) == 0); } // withdraw funds to msg.sender if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransfer(msg.sender, ERC20(_tokenAddr).balanceOf(address(this))); } else { msg.sender.transfer(address(this).balance); } } /// @notice User borrows tokens to the Compound protocol /// @param _tokenAddr The address of the token to be borrowed /// @param _cTokenAddr CTokens to be borrowed /// @param _amount Amount of tokens to be borrowed /// @param _inMarket True if the token is already in market for that address function borrow(address _tokenAddr, address _cTokenAddr, uint _amount, bool _inMarket) public burnGas(8) { if (!_inMarket) { enterMarket(_cTokenAddr); } require(CTokenInterface(_cTokenAddr).borrow(_amount) == 0); // withdraw funds to msg.sender if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransfer(msg.sender, ERC20(_tokenAddr).balanceOf(address(this))); } else { msg.sender.transfer(address(this).balance); } } /// @dev User needs to approve the DSProxy to pull the _tokenAddr tokens /// @notice User paybacks tokens to the Compound protocol /// @param _tokenAddr The address of the token to be paybacked /// @param _cTokenAddr CTokens to be paybacked /// @param _amount Amount of tokens to be payedback /// @param _wholeDebt If true the _amount will be set to the whole amount of the debt function payback(address _tokenAddr, address _cTokenAddr, uint _amount, bool _wholeDebt) public burnGas(5) payable { approveToken(_tokenAddr, _cTokenAddr); if (_wholeDebt) { _amount = CTokenInterface(_cTokenAddr).borrowBalanceCurrent(address(this)); } if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(this), _amount); require(CTokenInterface(_cTokenAddr).repayBorrow(_amount) == 0); } else { CEtherInterface(_cTokenAddr).repayBorrow{value: msg.value}(); msg.sender.transfer(address(this).balance); // send back the extra eth } } /// @notice Helper method to withdraw tokens from the DSProxy /// @param _tokenAddr Address of the token to be withdrawn function withdrawTokens(address _tokenAddr) public { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransfer(msg.sender, ERC20(_tokenAddr).balanceOf(address(this))); } else { msg.sender.transfer(address(this).balance); } } /// @notice Enters the Compound market so it can be deposited/borrowed /// @param _cTokenAddr CToken address of the token function enterMarket(address _cTokenAddr) public { address[] memory markets = new address[](1); markets[0] = _cTokenAddr; ComptrollerInterface(COMPTROLLER_ADDR).enterMarkets(markets); } /// @notice Exits the Compound market so it can't be deposited/borrowed /// @param _cTokenAddr CToken address of the token function exitMarket(address _cTokenAddr) public { ComptrollerInterface(COMPTROLLER_ADDR).exitMarket(_cTokenAddr); } /// @notice Approves CToken contract to pull underlying tokens from the DSProxy /// @param _tokenAddr Token we are trying to approve /// @param _cTokenAddr Address which will gain the approval function approveToken(address _tokenAddr, address _cTokenAddr) internal { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeApprove(_cTokenAddr, 0); ERC20(_tokenAddr).safeApprove(_cTokenAddr, uint(-1)); } } } contract CompoundSafetyRatio is Exponential, DSMath { // solhint-disable-next-line const-name-snakecase ComptrollerInterface public constant comp = ComptrollerInterface(0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B); /// @notice Calcualted the ratio of debt / adjusted collateral /// @param _user Address of the user function getSafetyRatio(address _user) public view returns (uint) { // For each asset the account is in address[] memory assets = comp.getAssetsIn(_user); address oracleAddr = comp.oracle(); uint sumCollateral = 0; uint sumBorrow = 0; for (uint i = 0; i < assets.length; i++) { address asset = assets[i]; (, uint cTokenBalance, uint borrowBalance, uint exchangeRateMantissa) = CTokenInterface(asset).getAccountSnapshot(_user); Exp memory oraclePrice; if (cTokenBalance != 0 || borrowBalance != 0) { oraclePrice = Exp({mantissa: CompoundOracleInterface(oracleAddr).getUnderlyingPrice(asset)}); } // Sum up collateral in Usd if (cTokenBalance != 0) { (, uint collFactorMantissa) = comp.markets(address(asset)); Exp memory collateralFactor = Exp({mantissa: collFactorMantissa}); Exp memory exchangeRate = Exp({mantissa: exchangeRateMantissa}); (, Exp memory tokensToUsd) = mulExp3(collateralFactor, exchangeRate, oraclePrice); (, sumCollateral) = mulScalarTruncateAddUInt(tokensToUsd, cTokenBalance, sumCollateral); } // Sum up debt in Usd if (borrowBalance != 0) { (, sumBorrow) = mulScalarTruncateAddUInt(oraclePrice, borrowBalance, sumBorrow); } } if (sumBorrow == 0) return uint(-1); uint borrowPowerUsed = (sumBorrow * 10**18) / sumCollateral; return wdiv(1e18, borrowPowerUsed); } } contract CompoundMonitor is AdminAuth, DSMath, CompoundSafetyRatio, GasBurner { using SafeERC20 for ERC20; enum Method { Boost, Repay } uint public REPAY_GAS_TOKEN = 20; uint public BOOST_GAS_TOKEN = 20; uint constant public MAX_GAS_PRICE = 500000000000; // 500 gwei uint public REPAY_GAS_COST = 2000000; uint public BOOST_GAS_COST = 2000000; address public constant GAS_TOKEN_INTERFACE_ADDRESS = 0x0000000000b3F879cb30FE243b4Dfee438691c04; address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; address public constant BOT_REGISTRY_ADDRESS = 0x637726f8b08a7ABE3aE3aCaB01A80E2d8ddeF77B; CompoundMonitorProxy public compoundMonitorProxy; CompoundSubscriptions public subscriptionsContract; address public compoundFlashLoanTakerAddress; DefisaverLogger public logger = DefisaverLogger(DEFISAVER_LOGGER); modifier onlyApproved() { require(BotRegistry(BOT_REGISTRY_ADDRESS).botList(msg.sender), "Not auth bot"); _; } /// @param _compoundMonitorProxy Proxy contracts that actually is authorized to call DSProxy /// @param _subscriptions Subscriptions contract for Compound positions /// @param _compoundFlashLoanTaker Contract that actually performs Repay/Boost constructor(address _compoundMonitorProxy, address _subscriptions, address _compoundFlashLoanTaker) public { compoundMonitorProxy = CompoundMonitorProxy(_compoundMonitorProxy); subscriptionsContract = CompoundSubscriptions(_subscriptions); compoundFlashLoanTakerAddress = _compoundFlashLoanTaker; } /// @notice Bots call this method to repay for user when conditions are met /// @dev If the contract ownes gas token it will try and use it for gas price reduction /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress, exchangeAddress] /// @param _user The actual address that owns the Compound position function repayFor( SaverExchangeCore.ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress address _user ) public payable onlyApproved burnGas(REPAY_GAS_TOKEN) { (bool isAllowed, uint ratioBefore) = canCall(Method.Repay, _user); require(isAllowed); // check if conditions are met uint256 gasCost = calcGasCost(REPAY_GAS_COST); compoundMonitorProxy.callExecute{value: msg.value}( _user, compoundFlashLoanTakerAddress, abi.encodeWithSignature( "repayWithLoan((address,address,uint256,uint256,uint256,address,address,bytes,uint256),address[2],uint256)", _exData, _cAddresses, gasCost ) ); (bool isGoodRatio, uint ratioAfter) = ratioGoodAfter(Method.Repay, _user); require(isGoodRatio); // check if the after result of the actions is good returnEth(); logger.Log(address(this), _user, "AutomaticCompoundRepay", abi.encode(ratioBefore, ratioAfter)); } /// @notice Bots call this method to boost for user when conditions are met /// @dev If the contract ownes gas token it will try and use it for gas price reduction /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress, exchangeAddress] /// @param _user The actual address that owns the Compound position function boostFor( SaverExchangeCore.ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress address _user ) public payable onlyApproved burnGas(BOOST_GAS_TOKEN) { (bool isAllowed, uint ratioBefore) = canCall(Method.Boost, _user); require(isAllowed); // check if conditions are met uint256 gasCost = calcGasCost(BOOST_GAS_COST); compoundMonitorProxy.callExecute{value: msg.value}( _user, compoundFlashLoanTakerAddress, abi.encodeWithSignature( "boostWithLoan((address,address,uint256,uint256,uint256,address,address,bytes,uint256),address[2],uint256)", _exData, _cAddresses, gasCost ) ); (bool isGoodRatio, uint ratioAfter) = ratioGoodAfter(Method.Boost, _user); require(isGoodRatio); // check if the after result of the actions is good returnEth(); logger.Log(address(this), _user, "AutomaticCompoundBoost", abi.encode(ratioBefore, ratioAfter)); } /******************* INTERNAL METHODS ********************************/ function returnEth() internal { // return if some eth left if (address(this).balance > 0) { msg.sender.transfer(address(this).balance); } } /******************* STATIC METHODS ********************************/ /// @notice Checks if Boost/Repay could be triggered for the CDP /// @dev Called by MCDMonitor to enforce the min/max check /// @param _method Type of action to be called /// @param _user The actual address that owns the Compound position /// @return Boolean if it can be called and the ratio function canCall(Method _method, address _user) public view returns(bool, uint) { bool subscribed = subscriptionsContract.isSubscribed(_user); CompoundSubscriptions.CompoundHolder memory holder = subscriptionsContract.getHolder(_user); // check if cdp is subscribed if (!subscribed) return (false, 0); // check if boost and boost allowed if (_method == Method.Boost && !holder.boostEnabled) return (false, 0); uint currRatio = getSafetyRatio(_user); if (_method == Method.Repay) { return (currRatio < holder.minRatio, currRatio); } else if (_method == Method.Boost) { return (currRatio > holder.maxRatio, currRatio); } } /// @dev After the Boost/Repay check if the ratio doesn't trigger another call /// @param _method Type of action to be called /// @param _user The actual address that owns the Compound position /// @return Boolean if the recent action preformed correctly and the ratio function ratioGoodAfter(Method _method, address _user) public view returns(bool, uint) { CompoundSubscriptions.CompoundHolder memory holder; holder= subscriptionsContract.getHolder(_user); uint currRatio = getSafetyRatio(_user); if (_method == Method.Repay) { return (currRatio < holder.maxRatio, currRatio); } else if (_method == Method.Boost) { return (currRatio > holder.minRatio, currRatio); } } /// @notice Calculates gas cost (in Eth) of tx /// @dev Gas price is limited to MAX_GAS_PRICE to prevent attack of draining user CDP /// @param _gasAmount Amount of gas used for the tx function calcGasCost(uint _gasAmount) public view returns (uint) { uint gasPrice = tx.gasprice <= MAX_GAS_PRICE ? tx.gasprice : MAX_GAS_PRICE; return mul(gasPrice, _gasAmount); } /******************* OWNER ONLY OPERATIONS ********************************/ /// @notice Allows owner to change gas cost for boost operation, but only up to 3 millions /// @param _gasCost New gas cost for boost method function changeBoostGasCost(uint _gasCost) public onlyOwner { require(_gasCost < 3000000); BOOST_GAS_COST = _gasCost; } /// @notice Allows owner to change gas cost for repay operation, but only up to 3 millions /// @param _gasCost New gas cost for repay method function changeRepayGasCost(uint _gasCost) public onlyOwner { require(_gasCost < 3000000); REPAY_GAS_COST = _gasCost; } /// @notice If any tokens gets stuck in the contract owner can withdraw it /// @param _tokenAddress Address of the ERC20 token /// @param _to Address of the receiver /// @param _amount The amount to be sent function transferERC20(address _tokenAddress, address _to, uint _amount) public onlyOwner { ERC20(_tokenAddress).safeTransfer(_to, _amount); } /// @notice If any Eth gets stuck in the contract owner can withdraw it /// @param _to Address of the receiver /// @param _amount The amount to be sent function transferEth(address payable _to, uint _amount) public onlyOwner { _to.transfer(_amount); } } contract CompoundSaverHelper is DSMath, Exponential { using SafeERC20 for ERC20; address payable public constant WALLET_ADDR = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; address public constant DISCOUNT_ADDR = 0x1b14E8D511c9A4395425314f849bD737BAF8208F; uint public constant MANUAL_SERVICE_FEE = 400; // 0.25% Fee uint public constant AUTOMATIC_SERVICE_FEE = 333; // 0.3% Fee address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant CETH_ADDRESS = 0x4Ddc2D193948926D02f9B1fE9e1daa0718270ED5; address public constant COMPTROLLER = 0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B; address public constant COMPOUND_LOGGER = 0x3DD0CDf5fFA28C6847B4B276e2fD256046a44bb7; address public constant BOT_REGISTRY_ADDRESS = 0x637726f8b08a7ABE3aE3aCaB01A80E2d8ddeF77B; /// @notice Helper method to payback the Compound debt /// @dev If amount is bigger it will repay the whole debt and send the extra to the _user /// @param _amount Amount of tokens we want to repay /// @param _cBorrowToken Ctoken address we are repaying /// @param _borrowToken Token address we are repaying /// @param _user Owner of the compound position we are paying back function paybackDebt(uint _amount, address _cBorrowToken, address _borrowToken, address payable _user) internal { uint wholeDebt = CTokenInterface(_cBorrowToken).borrowBalanceCurrent(address(this)); if (_amount > wholeDebt) { if (_borrowToken == ETH_ADDRESS) { _user.transfer((_amount - wholeDebt)); } else { ERC20(_borrowToken).safeTransfer(_user, (_amount - wholeDebt)); } _amount = wholeDebt; } approveCToken(_borrowToken, _cBorrowToken); if (_borrowToken == ETH_ADDRESS) { CEtherInterface(_cBorrowToken).repayBorrow{value: _amount}(); } else { require(CTokenInterface(_cBorrowToken).repayBorrow(_amount) == 0); } } /// @notice Calculates the fee amount /// @param _amount Amount that is converted /// @param _user Actuall user addr not DSProxy /// @param _gasCost Ether amount of gas we are spending for tx /// @param _cTokenAddr CToken addr. of token we are getting for the fee /// @return feeAmount The amount we took for the fee function getFee(uint _amount, address _user, uint _gasCost, address _cTokenAddr) internal returns (uint feeAmount) { uint fee = MANUAL_SERVICE_FEE; if (BotRegistry(BOT_REGISTRY_ADDRESS).botList(tx.origin)) { fee = AUTOMATIC_SERVICE_FEE; } address tokenAddr = getUnderlyingAddr(_cTokenAddr); if (Discount(DISCOUNT_ADDR).isCustomFeeSet(_user)) { fee = Discount(DISCOUNT_ADDR).getCustomServiceFee(_user); } feeAmount = (fee == 0) ? 0 : (_amount / fee); if (_gasCost != 0) { address oracle = ComptrollerInterface(COMPTROLLER).oracle(); uint usdTokenPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(_cTokenAddr); uint ethPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(CETH_ADDRESS); uint tokenPriceInEth = wdiv(usdTokenPrice, ethPrice); _gasCost = wdiv(_gasCost, tokenPriceInEth); feeAmount = add(feeAmount, _gasCost); } // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } if (tokenAddr == ETH_ADDRESS) { WALLET_ADDR.transfer(feeAmount); } else { ERC20(tokenAddr).safeTransfer(WALLET_ADDR, feeAmount); } } /// @notice Calculates the gas cost of transaction and send it to wallet /// @param _amount Amount that is converted /// @param _gasCost Ether amount of gas we are spending for tx /// @param _cTokenAddr CToken addr. of token we are getting for the fee /// @return feeAmount The amount we took for the fee function getGasCost(uint _amount, uint _gasCost, address _cTokenAddr) internal returns (uint feeAmount) { address tokenAddr = getUnderlyingAddr(_cTokenAddr); if (_gasCost != 0) { address oracle = ComptrollerInterface(COMPTROLLER).oracle(); uint usdTokenPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(_cTokenAddr); uint ethPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(CETH_ADDRESS); uint tokenPriceInEth = wdiv(usdTokenPrice, ethPrice); feeAmount = wdiv(_gasCost, tokenPriceInEth); } // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } if (tokenAddr == ETH_ADDRESS) { WALLET_ADDR.transfer(feeAmount); } else { ERC20(tokenAddr).safeTransfer(WALLET_ADDR, feeAmount); } } /// @notice Enters the market for the collatera and borrow tokens /// @param _cTokenAddrColl Collateral address we are entering the market in /// @param _cTokenAddrBorrow Borrow address we are entering the market in function enterMarket(address _cTokenAddrColl, address _cTokenAddrBorrow) internal { address[] memory markets = new address[](2); markets[0] = _cTokenAddrColl; markets[1] = _cTokenAddrBorrow; ComptrollerInterface(COMPTROLLER).enterMarkets(markets); } /// @notice Approves CToken contract to pull underlying tokens from the DSProxy /// @param _tokenAddr Token we are trying to approve /// @param _cTokenAddr Address which will gain the approval function approveCToken(address _tokenAddr, address _cTokenAddr) internal { if (_tokenAddr != ETH_ADDRESS) { ERC20(_tokenAddr).safeApprove(_cTokenAddr, 0); ERC20(_tokenAddr).safeApprove(_cTokenAddr, uint(-1)); } } /// @notice Returns the underlying address of the cToken asset /// @param _cTokenAddress cToken address /// @return Token address of the cToken specified function getUnderlyingAddr(address _cTokenAddress) internal returns (address) { if (_cTokenAddress == CETH_ADDRESS) { return ETH_ADDRESS; } else { return CTokenInterface(_cTokenAddress).underlying(); } } /// @notice Returns the owner of the DSProxy that called the contract function getUserAddress() internal view returns (address) { DSProxy proxy = DSProxy(uint160(address(this))); return proxy.owner(); } /// @notice Returns the maximum amount of collateral available to withdraw /// @dev Due to rounding errors the result is - 1% wei from the exact amount /// @param _cCollAddress Collateral we are getting the max value of /// @param _account Users account /// @return Returns the max. collateral amount in that token function getMaxCollateral(address _cCollAddress, address _account) public returns (uint) { (, uint liquidityInUsd, ) = ComptrollerInterface(COMPTROLLER).getAccountLiquidity(_account); uint usersBalance = CTokenInterface(_cCollAddress).balanceOfUnderlying(_account); address oracle = ComptrollerInterface(COMPTROLLER).oracle(); if (liquidityInUsd == 0) return usersBalance; CTokenInterface(_cCollAddress).accrueInterest(); (, uint collFactorMantissa) = ComptrollerInterface(COMPTROLLER).markets(_cCollAddress); Exp memory collateralFactor = Exp({mantissa: collFactorMantissa}); (, uint tokensToUsd) = divScalarByExpTruncate(liquidityInUsd, collateralFactor); uint usdPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(_cCollAddress); uint liqInToken = wdiv(tokensToUsd, usdPrice); if (liqInToken > usersBalance) return usersBalance; return sub(liqInToken, (liqInToken / 100)); // cut off 1% due to rounding issues } /// @notice Returns the maximum amount of borrow amount available /// @dev Due to rounding errors the result is - 1% wei from the exact amount /// @param _cBorrowAddress Borrow token we are getting the max value of /// @param _account Users account /// @return Returns the max. borrow amount in that token function getMaxBorrow(address _cBorrowAddress, address _account) public returns (uint) { (, uint liquidityInUsd, ) = ComptrollerInterface(COMPTROLLER).getAccountLiquidity(_account); address oracle = ComptrollerInterface(COMPTROLLER).oracle(); CTokenInterface(_cBorrowAddress).accrueInterest(); uint usdPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(_cBorrowAddress); uint liquidityInToken = wdiv(liquidityInUsd, usdPrice); return sub(liquidityInToken, (liquidityInToken / 100)); // cut off 1% due to rounding issues } } contract CompoundImportFlashLoan is FlashLoanReceiverBase { using SafeERC20 for ERC20; ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); address public constant COMPOUND_BORROW_PROXY = 0xb7EDC39bE76107e2Cc645f0f6a3D164f5e173Ee2; address public owner; constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public { owner = msg.sender; } /// @notice Called by Aave when sending back the FL amount /// @param _reserve The address of the borrowed token /// @param _amount Amount of FL tokens received /// @param _fee FL Aave fee /// @param _params The params that are sent from the original FL caller contract function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { ( address cCollateralToken, address cBorrowToken, address user, address proxy ) = abi.decode(_params, (address,address,address,address)); // approve FL tokens so we can repay them ERC20(_reserve).safeApprove(cBorrowToken, 0); ERC20(_reserve).safeApprove(cBorrowToken, uint(-1)); // repay compound debt require(CTokenInterface(cBorrowToken).repayBorrowBehalf(user, uint(-1)) == 0, "Repay borrow behalf fail"); // transfer cTokens to proxy uint cTokenBalance = CTokenInterface(cCollateralToken).balanceOf(user); require(CTokenInterface(cCollateralToken).transferFrom(user, proxy, cTokenBalance)); // borrow bytes memory proxyData = getProxyData(cCollateralToken, cBorrowToken, _reserve, (_amount + _fee)); DSProxyInterface(proxy).execute(COMPOUND_BORROW_PROXY, proxyData); // Repay the loan with the money DSProxy sent back transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); } /// @notice Formats function data call so we can call it through DSProxy /// @param _cCollToken CToken address of collateral /// @param _cBorrowToken CToken address we will borrow /// @param _borrowToken Token address we will borrow /// @param _amount Amount that will be borrowed /// @return proxyData Formated function call data function getProxyData(address _cCollToken, address _cBorrowToken, address _borrowToken, uint _amount) internal pure returns (bytes memory proxyData) { proxyData = abi.encodeWithSignature( "borrow(address,address,address,uint256)", _cCollToken, _cBorrowToken, _borrowToken, _amount); } function withdrawStuckFunds(address _tokenAddr, uint _amount) public { require(owner == msg.sender, "Must be owner"); if (_tokenAddr == 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE) { msg.sender.transfer(_amount); } else { ERC20(_tokenAddr).safeTransfer(owner, _amount); } } } contract CompoundImportTaker is CompoundSaverHelper, ProxyPermission, GasBurner { ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); address payable public constant COMPOUND_IMPORT_FLASH_LOAN = 0x0a9238e14d5A20CDb03811B12D1984587C3CE9a0; address public constant PROXY_REGISTRY_ADDRESS = 0x4678f0a6958e4D2Bc4F1BAF7Bc52E8F3564f3fE4; DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); /// @notice Starts the process to move users position 1 collateral and 1 borrow /// @dev User must approve COMPOUND_IMPORT_FLASH_LOAN to pull _cCollateralToken /// @param _cCollateralToken Collateral we are moving to DSProxy /// @param _cBorrowToken Borrow token we are moving to DSProxy function importLoan(address _cCollateralToken, address _cBorrowToken) external burnGas(20) { address proxy = getProxy(); uint loanAmount = CTokenInterface(_cBorrowToken).borrowBalanceCurrent(msg.sender); bytes memory paramsData = abi.encode(_cCollateralToken, _cBorrowToken, msg.sender, proxy); givePermission(COMPOUND_IMPORT_FLASH_LOAN); lendingPool.flashLoan(COMPOUND_IMPORT_FLASH_LOAN, getUnderlyingAddr(_cBorrowToken), loanAmount, paramsData); removePermission(COMPOUND_IMPORT_FLASH_LOAN); logger.Log(address(this), msg.sender, "CompoundImport", abi.encode(loanAmount, 0, _cCollateralToken)); } /// @notice Gets proxy address, if user doesn't has DSProxy build it /// @return proxy DsProxy address function getProxy() internal returns (address proxy) { proxy = ProxyRegistryInterface(PROXY_REGISTRY_ADDRESS).proxies(msg.sender); if (proxy == address(0)) { proxy = ProxyRegistryInterface(PROXY_REGISTRY_ADDRESS).build(msg.sender); } } } contract CreamBasicProxy is GasBurner { address public constant ETH_ADDR = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant COMPTROLLER_ADDR = 0x3d5BC3c8d13dcB8bF317092d84783c2697AE9258; using SafeERC20 for ERC20; /// @notice User deposits tokens to the cream protocol /// @dev User needs to approve the DSProxy to pull the _tokenAddr tokens /// @param _tokenAddr The address of the token to be deposited /// @param _cTokenAddr CTokens to be deposited /// @param _amount Amount of tokens to be deposited /// @param _inMarket True if the token is already in market for that address function deposit(address _tokenAddr, address _cTokenAddr, uint _amount, bool _inMarket) public burnGas(5) payable { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(this), _amount); } approveToken(_tokenAddr, _cTokenAddr); if (!_inMarket) { enterMarket(_cTokenAddr); } if (_tokenAddr != ETH_ADDR) { require(CTokenInterface(_cTokenAddr).mint(_amount) == 0); } else { CEtherInterface(_cTokenAddr).mint{value: msg.value}(); // reverts on fail } } /// @notice User withdraws tokens to the cream protocol /// @param _tokenAddr The address of the token to be withdrawn /// @param _cTokenAddr CTokens to be withdrawn /// @param _amount Amount of tokens to be withdrawn /// @param _isCAmount If true _amount is cTokens if falls _amount is underlying tokens function withdraw(address _tokenAddr, address _cTokenAddr, uint _amount, bool _isCAmount) public burnGas(5) { if (_isCAmount) { require(CTokenInterface(_cTokenAddr).redeem(_amount) == 0); } else { require(CTokenInterface(_cTokenAddr).redeemUnderlying(_amount) == 0); } // withdraw funds to msg.sender if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransfer(msg.sender, ERC20(_tokenAddr).balanceOf(address(this))); } else { msg.sender.transfer(address(this).balance); } } /// @notice User borrows tokens to the cream protocol /// @param _tokenAddr The address of the token to be borrowed /// @param _cTokenAddr CTokens to be borrowed /// @param _amount Amount of tokens to be borrowed /// @param _inMarket True if the token is already in market for that address function borrow(address _tokenAddr, address _cTokenAddr, uint _amount, bool _inMarket) public burnGas(8) { if (!_inMarket) { enterMarket(_cTokenAddr); } require(CTokenInterface(_cTokenAddr).borrow(_amount) == 0); // withdraw funds to msg.sender if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransfer(msg.sender, ERC20(_tokenAddr).balanceOf(address(this))); } else { msg.sender.transfer(address(this).balance); } } /// @dev User needs to approve the DSProxy to pull the _tokenAddr tokens /// @notice User paybacks tokens to the cream protocol /// @param _tokenAddr The address of the token to be paybacked /// @param _cTokenAddr CTokens to be paybacked /// @param _amount Amount of tokens to be payedback /// @param _wholeDebt If true the _amount will be set to the whole amount of the debt function payback(address _tokenAddr, address _cTokenAddr, uint _amount, bool _wholeDebt) public burnGas(5) payable { approveToken(_tokenAddr, _cTokenAddr); if (_wholeDebt) { _amount = CTokenInterface(_cTokenAddr).borrowBalanceCurrent(address(this)); } if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(this), _amount); require(CTokenInterface(_cTokenAddr).repayBorrow(_amount) == 0); } else { CEtherInterface(_cTokenAddr).repayBorrow{value: msg.value}(); msg.sender.transfer(address(this).balance); // send back the extra eth } } /// @notice Helper method to withdraw tokens from the DSProxy /// @param _tokenAddr Address of the token to be withdrawn function withdrawTokens(address _tokenAddr) public { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransfer(msg.sender, ERC20(_tokenAddr).balanceOf(address(this))); } else { msg.sender.transfer(address(this).balance); } } /// @notice Enters the cream market so it can be deposited/borrowed /// @param _cTokenAddr CToken address of the token function enterMarket(address _cTokenAddr) public { address[] memory markets = new address[](1); markets[0] = _cTokenAddr; ComptrollerInterface(COMPTROLLER_ADDR).enterMarkets(markets); } /// @notice Exits the cream market so it can't be deposited/borrowed /// @param _cTokenAddr CToken address of the token function exitMarket(address _cTokenAddr) public { ComptrollerInterface(COMPTROLLER_ADDR).exitMarket(_cTokenAddr); } /// @notice Approves CToken contract to pull underlying tokens from the DSProxy /// @param _tokenAddr Token we are trying to approve /// @param _cTokenAddr Address which will gain the approval function approveToken(address _tokenAddr, address _cTokenAddr) internal { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeApprove(_cTokenAddr, 0); ERC20(_tokenAddr).safeApprove(_cTokenAddr, uint(-1)); } } } contract CreamLoanInfo is CreamSafetyRatio { struct LoanData { address user; uint128 ratio; address[] collAddr; address[] borrowAddr; uint[] collAmounts; uint[] borrowAmounts; } struct TokenInfo { address cTokenAddress; address underlyingTokenAddress; uint collateralFactor; uint price; } struct TokenInfoFull { address underlyingTokenAddress; uint supplyRate; uint borrowRate; uint exchangeRate; uint marketLiquidity; uint totalSupply; uint totalBorrow; uint collateralFactor; uint price; } address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant CETH_ADDRESS = 0xD06527D5e56A3495252A528C4987003b712860eE; /// @notice Calcualted the ratio of coll/debt for a cream user /// @param _user Address of the user function getRatio(address _user) public view returns (uint) { // For each asset the account is in return getSafetyRatio(_user); } /// @notice Fetches cream prices for tokens /// @param _cTokens Arr. of cTokens for which to get the prices /// @return prices Array of prices function getPrices(address[] memory _cTokens) public view returns (uint[] memory prices) { prices = new uint[](_cTokens.length); address oracleAddr = comp.oracle(); for (uint i = 0; i < _cTokens.length; ++i) { prices[i] = CompoundOracleInterface(oracleAddr).getUnderlyingPrice(_cTokens[i]); } } /// @notice Fetches cream collateral factors for tokens /// @param _cTokens Arr. of cTokens for which to get the coll. factors /// @return collFactors Array of coll. factors function getCollFactors(address[] memory _cTokens) public view returns (uint[] memory collFactors) { collFactors = new uint[](_cTokens.length); for (uint i = 0; i < _cTokens.length; ++i) { (, collFactors[i]) = comp.markets(_cTokens[i]); } } /// @notice Fetches all the collateral/debt address and amounts, denominated in eth /// @param _user Address of the user /// @return data LoanData information function getLoanData(address _user) public view returns (LoanData memory data) { address[] memory assets = comp.getAssetsIn(_user); address oracleAddr = comp.oracle(); data = LoanData({ user: _user, ratio: 0, collAddr: new address[](assets.length), borrowAddr: new address[](assets.length), collAmounts: new uint[](assets.length), borrowAmounts: new uint[](assets.length) }); uint collPos = 0; uint borrowPos = 0; for (uint i = 0; i < assets.length; i++) { address asset = assets[i]; (, uint cTokenBalance, uint borrowBalance, uint exchangeRateMantissa) = CTokenInterface(asset).getAccountSnapshot(_user); Exp memory oraclePrice; if (cTokenBalance != 0 || borrowBalance != 0) { oraclePrice = Exp({mantissa: CompoundOracleInterface(oracleAddr).getUnderlyingPrice(asset)}); } // Sum up collateral in eth if (cTokenBalance != 0) { Exp memory exchangeRate = Exp({mantissa: exchangeRateMantissa}); (, Exp memory tokensToEth) = mulExp(exchangeRate, oraclePrice); data.collAddr[collPos] = asset; (, data.collAmounts[collPos]) = mulScalarTruncate(tokensToEth, cTokenBalance); collPos++; } // Sum up debt in eth if (borrowBalance != 0) { data.borrowAddr[borrowPos] = asset; (, data.borrowAmounts[borrowPos]) = mulScalarTruncate(oraclePrice, borrowBalance); borrowPos++; } } data.ratio = uint128(getSafetyRatio(_user)); return data; } function getTokenBalances(address _user, address[] memory _cTokens) public view returns (uint[] memory balances, uint[] memory borrows) { balances = new uint[](_cTokens.length); borrows = new uint[](_cTokens.length); for (uint i = 0; i < _cTokens.length; i++) { address asset = _cTokens[i]; (, uint cTokenBalance, uint borrowBalance, uint exchangeRateMantissa) = CTokenInterface(asset).getAccountSnapshot(_user); Exp memory exchangeRate = Exp({mantissa: exchangeRateMantissa}); (, balances[i]) = mulScalarTruncate(exchangeRate, cTokenBalance); borrows[i] = borrowBalance; } } /// @notice Fetches all the collateral/debt address and amounts, denominated in eth /// @param _users Addresses of the user /// @return loans Array of LoanData information function getLoanDataArr(address[] memory _users) public view returns (LoanData[] memory loans) { loans = new LoanData[](_users.length); for (uint i = 0; i < _users.length; ++i) { loans[i] = getLoanData(_users[i]); } } /// @notice Calcualted the ratio of coll/debt for a cream user /// @param _users Addresses of the user /// @return ratios Array of ratios function getRatios(address[] memory _users) public view returns (uint[] memory ratios) { ratios = new uint[](_users.length); for (uint i = 0; i < _users.length; ++i) { ratios[i] = getSafetyRatio(_users[i]); } } /// @notice Information about cTokens /// @param _cTokenAddresses Array of cTokens addresses /// @return tokens Array of cTokens infomartion function getTokensInfo(address[] memory _cTokenAddresses) public returns(TokenInfo[] memory tokens) { tokens = new TokenInfo[](_cTokenAddresses.length); address oracleAddr = comp.oracle(); for (uint i = 0; i < _cTokenAddresses.length; ++i) { (, uint collFactor) = comp.markets(_cTokenAddresses[i]); tokens[i] = TokenInfo({ cTokenAddress: _cTokenAddresses[i], underlyingTokenAddress: getUnderlyingAddr(_cTokenAddresses[i]), collateralFactor: collFactor, price: CompoundOracleInterface(oracleAddr).getUnderlyingPrice(_cTokenAddresses[i]) }); } } /// @notice Information about cTokens /// @param _cTokenAddresses Array of cTokens addresses /// @return tokens Array of cTokens infomartion function getFullTokensInfo(address[] memory _cTokenAddresses) public returns(TokenInfoFull[] memory tokens) { tokens = new TokenInfoFull[](_cTokenAddresses.length); address oracleAddr = comp.oracle(); for (uint i = 0; i < _cTokenAddresses.length; ++i) { (, uint collFactor) = comp.markets(_cTokenAddresses[i]); CTokenInterface cToken = CTokenInterface(_cTokenAddresses[i]); tokens[i] = TokenInfoFull({ underlyingTokenAddress: getUnderlyingAddr(_cTokenAddresses[i]), supplyRate: cToken.supplyRatePerBlock(), borrowRate: cToken.borrowRatePerBlock(), exchangeRate: cToken.exchangeRateCurrent(), marketLiquidity: cToken.getCash(), totalSupply: cToken.totalSupply(), totalBorrow: cToken.totalBorrowsCurrent(), collateralFactor: collFactor, price: CompoundOracleInterface(oracleAddr).getUnderlyingPrice(_cTokenAddresses[i]) }); } } /// @notice Returns the underlying address of the cToken asset /// @param _cTokenAddress cToken address /// @return Token address of the cToken specified function getUnderlyingAddr(address _cTokenAddress) internal returns (address) { if (_cTokenAddress == CETH_ADDRESS) { return ETH_ADDRESS; } else { return CTokenInterface(_cTokenAddress).underlying(); } } } contract SaverExchangeCore is SaverExchangeHelper, DSMath { // first is empty to keep the legacy order in place enum ExchangeType { _, OASIS, KYBER, UNISWAP, ZEROX } enum ActionType { SELL, BUY } struct ExchangeData { address srcAddr; address destAddr; uint srcAmount; uint destAmount; uint minPrice; address wrapper; address exchangeAddr; bytes callData; uint256 price0x; } /// @notice Internal method that preforms a sell on 0x/on-chain /// @dev Usefull for other DFS contract to integrate for exchanging /// @param exData Exchange data struct /// @return (address, uint) Address of the wrapper used and destAmount function _sell(ExchangeData memory exData) internal returns (address, uint) { address wrapper; uint swapedTokens; bool success; uint tokensLeft = exData.srcAmount; // if selling eth, convert to weth if (exData.srcAddr == KYBER_ETH_ADDRESS) { exData.srcAddr = ethToWethAddr(exData.srcAddr); TokenInterface(WETH_ADDRESS).deposit.value(exData.srcAmount)(); } // Try 0x first and then fallback on specific wrapper if (exData.price0x > 0) { approve0xProxy(exData.srcAddr, exData.srcAmount); uint ethAmount = getProtocolFee(exData.srcAddr, msg.value, exData.srcAmount); (success, swapedTokens, tokensLeft) = takeOrder(exData, ethAmount, ActionType.SELL); if (success) { wrapper = exData.exchangeAddr; } } // fallback to desired wrapper if 0x failed if (!success) { swapedTokens = saverSwap(exData, ActionType.SELL); wrapper = exData.wrapper; } require(getBalance(exData.destAddr) >= wmul(exData.minPrice, exData.srcAmount), "Final amount isn't correct"); // if anything is left in weth, pull it to user as eth if (getBalance(WETH_ADDRESS) > 0) { TokenInterface(WETH_ADDRESS).withdraw( TokenInterface(WETH_ADDRESS).balanceOf(address(this)) ); } return (wrapper, swapedTokens); } /// @notice Internal method that preforms a buy on 0x/on-chain /// @dev Usefull for other DFS contract to integrate for exchanging /// @param exData Exchange data struct /// @return (address, uint) Address of the wrapper used and srcAmount function _buy(ExchangeData memory exData) internal returns (address, uint) { address wrapper; uint swapedTokens; bool success; require(exData.destAmount != 0, "Dest amount must be specified"); // if selling eth, convert to weth if (exData.srcAddr == KYBER_ETH_ADDRESS) { exData.srcAddr = ethToWethAddr(exData.srcAddr); TokenInterface(WETH_ADDRESS).deposit.value(exData.srcAmount)(); } if (exData.price0x > 0) { approve0xProxy(exData.srcAddr, exData.srcAmount); uint ethAmount = getProtocolFee(exData.srcAddr, msg.value, exData.srcAmount); (success, swapedTokens,) = takeOrder(exData, ethAmount, ActionType.BUY); if (success) { wrapper = exData.exchangeAddr; } } // fallback to desired wrapper if 0x failed if (!success) { swapedTokens = saverSwap(exData, ActionType.BUY); wrapper = exData.wrapper; } require(swapedTokens >= exData.destAmount, "Final amount isn't correct"); // if anything is left in weth, pull it to user as eth if (getBalance(WETH_ADDRESS) > 0) { TokenInterface(WETH_ADDRESS).withdraw( TokenInterface(WETH_ADDRESS).balanceOf(address(this)) ); } return (wrapper, getBalance(exData.destAddr)); } /// @notice Takes order from 0x and returns bool indicating if it is successful /// @param _exData Exchange data /// @param _ethAmount Ether fee needed for 0x order function takeOrder( ExchangeData memory _exData, uint256 _ethAmount, ActionType _type ) private returns (bool success, uint256, uint256) { // write in the exact amount we are selling/buing in an order if (_type == ActionType.SELL) { writeUint256(_exData.callData, 36, _exData.srcAmount); } else { writeUint256(_exData.callData, 36, _exData.destAmount); } if (ZrxAllowlist(ZRX_ALLOWLIST_ADDR).isNonPayableAddr(_exData.exchangeAddr)) { _ethAmount = 0; } uint256 tokensBefore = getBalance(_exData.destAddr); if (ZrxAllowlist(ZRX_ALLOWLIST_ADDR).isZrxAddr(_exData.exchangeAddr)) { (success, ) = _exData.exchangeAddr.call{value: _ethAmount}(_exData.callData); } else { success = false; } uint256 tokensSwaped = 0; uint256 tokensLeft = _exData.srcAmount; if (success) { // check to see if any _src tokens are left over after exchange tokensLeft = getBalance(_exData.srcAddr); // convert weth -> eth if needed if (_exData.destAddr == KYBER_ETH_ADDRESS) { TokenInterface(WETH_ADDRESS).withdraw( TokenInterface(WETH_ADDRESS).balanceOf(address(this)) ); } // get the current balance of the swaped tokens tokensSwaped = getBalance(_exData.destAddr) - tokensBefore; } return (success, tokensSwaped, tokensLeft); } /// @notice Calls wraper contract for exchage to preform an on-chain swap /// @param _exData Exchange data struct /// @param _type Type of action SELL|BUY /// @return swapedTokens For Sell that the destAmount, for Buy thats the srcAmount function saverSwap(ExchangeData memory _exData, ActionType _type) internal returns (uint swapedTokens) { require(SaverExchangeRegistry(SAVER_EXCHANGE_REGISTRY).isWrapper(_exData.wrapper), "Wrapper is not valid"); uint ethValue = 0; ERC20(_exData.srcAddr).safeTransfer(_exData.wrapper, _exData.srcAmount); if (_type == ActionType.SELL) { swapedTokens = ExchangeInterfaceV2(_exData.wrapper). sell{value: ethValue}(_exData.srcAddr, _exData.destAddr, _exData.srcAmount); } else { swapedTokens = ExchangeInterfaceV2(_exData.wrapper). buy{value: ethValue}(_exData.srcAddr, _exData.destAddr, _exData.destAmount); } } function writeUint256(bytes memory _b, uint256 _index, uint _input) internal pure { if (_b.length < _index + 32) { revert("Incorrent lengt while writting bytes32"); } bytes32 input = bytes32(_input); _index += 32; // Read the bytes32 from array memory assembly { mstore(add(_b, _index), input) } } /// @notice Converts Kybers Eth address -> Weth /// @param _src Input address function ethToWethAddr(address _src) internal pure returns (address) { return _src == KYBER_ETH_ADDRESS ? WETH_ADDRESS : _src; } /// @notice Calculates protocol fee /// @param _srcAddr selling token address (if eth should be WETH) /// @param _msgValue msg.value in transaction /// @param _srcAmount amount we are selling function getProtocolFee(address _srcAddr, uint256 _msgValue, uint256 _srcAmount) internal returns(uint256) { // if we are not selling ETH msg value is always the protocol fee if (_srcAddr != WETH_ADDRESS) return _msgValue; // if msg value is larger than srcAmount, that means that msg value is protocol fee + srcAmount, so we subsctract srcAmount from msg value // we have an edge case here when protocol fee is higher than selling amount if (_msgValue > _srcAmount) return _msgValue - _srcAmount; // if msg value is lower than src amount, that means that srcAmount isn't included in msg value, so we return msg value return _msgValue; } function packExchangeData(ExchangeData memory _exData) public pure returns(bytes memory) { // splitting in two different bytes and encoding all because of stack too deep in decoding part bytes memory part1 = abi.encode( _exData.srcAddr, _exData.destAddr, _exData.srcAmount, _exData.destAmount ); bytes memory part2 = abi.encode( _exData.minPrice, _exData.wrapper, _exData.exchangeAddr, _exData.callData, _exData.price0x ); return abi.encode(part1, part2); } function unpackExchangeData(bytes memory _data) public pure returns(ExchangeData memory _exData) { ( bytes memory part1, bytes memory part2 ) = abi.decode(_data, (bytes,bytes)); ( _exData.srcAddr, _exData.destAddr, _exData.srcAmount, _exData.destAmount ) = abi.decode(part1, (address,address,uint256,uint256)); ( _exData.minPrice, _exData.wrapper, _exData.exchangeAddr, _exData.callData, _exData.price0x ) = abi.decode(part2, (uint256,address,address,bytes,uint256)); } // solhint-disable-next-line no-empty-blocks receive() external virtual payable {} } contract KyberWrapper is DSMath, ExchangeInterfaceV2, AdminAuth { address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant KYBER_INTERFACE = 0x9AAb3f75489902f3a48495025729a0AF77d4b11e; address payable public constant WALLET_ID = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; using SafeERC20 for ERC20; /// @notice Sells a _srcAmount of tokens at Kyber /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Destination amount function sell(address _srcAddr, address _destAddr, uint _srcAmount) external override payable returns (uint) { ERC20 srcToken = ERC20(_srcAddr); ERC20 destToken = ERC20(_destAddr); KyberNetworkProxyInterface kyberNetworkProxy = KyberNetworkProxyInterface(KYBER_INTERFACE); if (_srcAddr != KYBER_ETH_ADDRESS) { srcToken.safeApprove(address(kyberNetworkProxy), _srcAmount); } uint destAmount = kyberNetworkProxy.trade{value: msg.value}( srcToken, _srcAmount, destToken, msg.sender, uint(-1), 0, WALLET_ID ); return destAmount; } /// @notice Buys a _destAmount of tokens at Kyber /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint srcAmount function buy(address _srcAddr, address _destAddr, uint _destAmount) external override payable returns(uint) { ERC20 srcToken = ERC20(_srcAddr); ERC20 destToken = ERC20(_destAddr); uint srcAmount = 0; if (_srcAddr != KYBER_ETH_ADDRESS) { srcAmount = srcToken.balanceOf(address(this)); } else { srcAmount = msg.value; } KyberNetworkProxyInterface kyberNetworkProxy = KyberNetworkProxyInterface(KYBER_INTERFACE); if (_srcAddr != KYBER_ETH_ADDRESS) { srcToken.safeApprove(address(kyberNetworkProxy), srcAmount); } uint destAmount = kyberNetworkProxy.trade{value: msg.value}( srcToken, srcAmount, destToken, msg.sender, _destAmount, 0, WALLET_ID ); require(destAmount == _destAmount, "Wrong dest amount"); uint srcAmountAfter = 0; if (_srcAddr != KYBER_ETH_ADDRESS) { srcAmountAfter = srcToken.balanceOf(address(this)); } else { srcAmountAfter = address(this).balance; } // Send the leftover from the source token back sendLeftOver(_srcAddr); return (srcAmount - srcAmountAfter); } /// @notice Return a rate for which we can sell an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return rate Rate function getSellRate(address _srcAddr, address _destAddr, uint _srcAmount) public override view returns (uint rate) { (rate, ) = KyberNetworkProxyInterface(KYBER_INTERFACE) .getExpectedRate(ERC20(_srcAddr), ERC20(_destAddr), _srcAmount); // multiply with decimal difference in src token rate = rate * (10**(18 - getDecimals(_srcAddr))); // divide with decimal difference in dest token rate = rate / (10**(18 - getDecimals(_destAddr))); } /// @notice Return a rate for which we can buy an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return rate Rate function getBuyRate(address _srcAddr, address _destAddr, uint _destAmount) public override view returns (uint rate) { uint256 srcRate = getSellRate(_destAddr, _srcAddr, _destAmount); uint256 srcAmount = wmul(srcRate, _destAmount); rate = getSellRate(_srcAddr, _destAddr, srcAmount); // increase rate by 3% too account for inaccuracy between sell/buy conversion rate = rate + (rate / 30); } /// @notice Send any leftover tokens, we use to clear out srcTokens after buy /// @param _srcAddr Source token address function sendLeftOver(address _srcAddr) internal { msg.sender.transfer(address(this).balance); if (_srcAddr != KYBER_ETH_ADDRESS) { ERC20(_srcAddr).safeTransfer(msg.sender, ERC20(_srcAddr).balanceOf(address(this))); } } receive() payable external {} function getDecimals(address _token) internal view returns (uint256) { if (_token == KYBER_ETH_ADDRESS) return 18; return ERC20(_token).decimals(); } } contract OasisTradeWrapper is DSMath, ExchangeInterfaceV2, AdminAuth { using SafeERC20 for ERC20; address public constant OTC_ADDRESS = 0x794e6e91555438aFc3ccF1c5076A74F42133d08D; address public constant WETH_ADDRESS = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; /// @notice Sells a _srcAmount of tokens at Oasis /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Destination amount function sell(address _srcAddr, address _destAddr, uint _srcAmount) external override payable returns (uint) { address srcAddr = ethToWethAddr(_srcAddr); address destAddr = ethToWethAddr(_destAddr); ERC20(srcAddr).safeApprove(OTC_ADDRESS, _srcAmount); uint destAmount = OasisInterface(OTC_ADDRESS).sellAllAmount(srcAddr, _srcAmount, destAddr, 0); // convert weth -> eth and send back if (destAddr == WETH_ADDRESS) { TokenInterface(WETH_ADDRESS).withdraw(destAmount); msg.sender.transfer(destAmount); } else { ERC20(destAddr).safeTransfer(msg.sender, destAmount); } return destAmount; } /// @notice Buys a _destAmount of tokens at Oasis /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint srcAmount function buy(address _srcAddr, address _destAddr, uint _destAmount) external override payable returns(uint) { address srcAddr = ethToWethAddr(_srcAddr); address destAddr = ethToWethAddr(_destAddr); ERC20(srcAddr).safeApprove(OTC_ADDRESS, uint(-1)); uint srcAmount = OasisInterface(OTC_ADDRESS).buyAllAmount(destAddr, _destAmount, srcAddr, uint(-1)); // convert weth -> eth and send back if (destAddr == WETH_ADDRESS) { TokenInterface(WETH_ADDRESS).withdraw(_destAmount); msg.sender.transfer(_destAmount); } else { ERC20(destAddr).safeTransfer(msg.sender, _destAmount); } // Send the leftover from the source token back sendLeftOver(srcAddr); return srcAmount; } /// @notice Return a rate for which we can sell an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Rate function getSellRate(address _srcAddr, address _destAddr, uint _srcAmount) public override view returns (uint) { address srcAddr = ethToWethAddr(_srcAddr); address destAddr = ethToWethAddr(_destAddr); return wdiv(OasisInterface(OTC_ADDRESS).getBuyAmount(destAddr, srcAddr, _srcAmount), _srcAmount); } /// @notice Return a rate for which we can buy an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint Rate function getBuyRate(address _srcAddr, address _destAddr, uint _destAmount) public override view returns (uint) { address srcAddr = ethToWethAddr(_srcAddr); address destAddr = ethToWethAddr(_destAddr); return wdiv(1 ether, wdiv(OasisInterface(OTC_ADDRESS).getPayAmount(srcAddr, destAddr, _destAmount), _destAmount)); } /// @notice Send any leftover tokens, we use to clear out srcTokens after buy /// @param _srcAddr Source token address function sendLeftOver(address _srcAddr) internal { msg.sender.transfer(address(this).balance); if (_srcAddr != KYBER_ETH_ADDRESS) { ERC20(_srcAddr).safeTransfer(msg.sender, ERC20(_srcAddr).balanceOf(address(this))); } } /// @notice Converts Kybers Eth address -> Weth /// @param _src Input address function ethToWethAddr(address _src) internal pure returns (address) { return _src == KYBER_ETH_ADDRESS ? WETH_ADDRESS : _src; } receive() payable external {} } contract UniswapV2Wrapper is DSMath, ExchangeInterfaceV2, AdminAuth { address public constant WETH_ADDRESS = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; UniswapRouterInterface public constant router = UniswapRouterInterface(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D); using SafeERC20 for ERC20; /// @notice Sells a _srcAmount of tokens at UniswapV2 /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Destination amount function sell(address _srcAddr, address _destAddr, uint _srcAmount) external payable override returns (uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); uint[] memory amounts; address[] memory path = new address[](2); path[0] = _srcAddr; path[1] = _destAddr; ERC20(_srcAddr).safeApprove(address(router), _srcAmount); // if we are buying ether if (_destAddr == WETH_ADDRESS) { amounts = router.swapExactTokensForETH(_srcAmount, 1, path, msg.sender, block.timestamp + 1); } // if we are selling token to token else { amounts = router.swapExactTokensForTokens(_srcAmount, 1, path, msg.sender, block.timestamp + 1); } return amounts[amounts.length - 1]; } /// @notice Buys a _destAmount of tokens at UniswapV2 /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint srcAmount function buy(address _srcAddr, address _destAddr, uint _destAmount) external override payable returns(uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); uint[] memory amounts; address[] memory path = new address[](2); path[0] = _srcAddr; path[1] = _destAddr; ERC20(_srcAddr).safeApprove(address(router), uint(-1)); // if we are buying ether if (_destAddr == WETH_ADDRESS) { amounts = router.swapTokensForExactETH(_destAmount, uint(-1), path, msg.sender, block.timestamp + 1); } // if we are buying token to token else { amounts = router.swapTokensForExactTokens(_destAmount, uint(-1), path, msg.sender, block.timestamp + 1); } // Send the leftover from the source token back sendLeftOver(_srcAddr); return amounts[0]; } /// @notice Return a rate for which we can sell an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Rate function getSellRate(address _srcAddr, address _destAddr, uint _srcAmount) public override view returns (uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); address[] memory path = new address[](2); path[0] = _srcAddr; path[1] = _destAddr; uint[] memory amounts = router.getAmountsOut(_srcAmount, path); return wdiv(amounts[amounts.length - 1], _srcAmount); } /// @notice Return a rate for which we can buy an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint Rate function getBuyRate(address _srcAddr, address _destAddr, uint _destAmount) public override view returns (uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); address[] memory path = new address[](2); path[0] = _srcAddr; path[1] = _destAddr; uint[] memory amounts = router.getAmountsIn(_destAmount, path); return wdiv(_destAmount, amounts[0]); } /// @notice Send any leftover tokens, we use to clear out srcTokens after buy /// @param _srcAddr Source token address function sendLeftOver(address _srcAddr) internal { msg.sender.transfer(address(this).balance); if (_srcAddr != KYBER_ETH_ADDRESS) { ERC20(_srcAddr).safeTransfer(msg.sender, ERC20(_srcAddr).balanceOf(address(this))); } } /// @notice Converts Kybers Eth address -> Weth /// @param _src Input address function ethToWethAddr(address _src) internal pure returns (address) { return _src == KYBER_ETH_ADDRESS ? WETH_ADDRESS : _src; } function getDecimals(address _token) internal view returns (uint256) { if (_token == KYBER_ETH_ADDRESS) return 18; return ERC20(_token).decimals(); } receive() payable external {} } contract UniswapWrapper is DSMath, ExchangeInterfaceV2, AdminAuth { address public constant WETH_ADDRESS = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant UNISWAP_FACTORY = 0xc0a47dFe034B400B47bDaD5FecDa2621de6c4d95; using SafeERC20 for ERC20; /// @notice Sells a _srcAmount of tokens at Uniswap /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Destination amount function sell(address _srcAddr, address _destAddr, uint _srcAmount) external payable override returns (uint) { address uniswapExchangeAddr; uint destAmount; _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); // if we are buying ether if (_destAddr == WETH_ADDRESS) { uniswapExchangeAddr = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr); ERC20(_srcAddr).safeApprove(uniswapExchangeAddr, _srcAmount); destAmount = UniswapExchangeInterface(uniswapExchangeAddr). tokenToEthTransferInput(_srcAmount, 1, block.timestamp + 1, msg.sender); } // if we are selling token to token else { uniswapExchangeAddr = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr); ERC20(_srcAddr).safeApprove(uniswapExchangeAddr, _srcAmount); destAmount = UniswapExchangeInterface(uniswapExchangeAddr). tokenToTokenTransferInput(_srcAmount, 1, 1, block.timestamp + 1, msg.sender, _destAddr); } return destAmount; } /// @notice Buys a _destAmount of tokens at Uniswap /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint srcAmount function buy(address _srcAddr, address _destAddr, uint _destAmount) external override payable returns(uint) { address uniswapExchangeAddr; uint srcAmount; _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); // if we are buying ether if (_destAddr == WETH_ADDRESS) { uniswapExchangeAddr = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr); ERC20(_srcAddr).safeApprove(uniswapExchangeAddr, uint(-1)); srcAmount = UniswapExchangeInterface(uniswapExchangeAddr). tokenToEthTransferOutput(_destAmount, uint(-1), block.timestamp + 1, msg.sender); } // if we are buying token to token else { uniswapExchangeAddr = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr); ERC20(_srcAddr).safeApprove(uniswapExchangeAddr, uint(-1)); srcAmount = UniswapExchangeInterface(uniswapExchangeAddr). tokenToTokenTransferOutput(_destAmount, uint(-1), uint(-1), block.timestamp + 1, msg.sender, _destAddr); } // Send the leftover from the source token back sendLeftOver(_srcAddr); return srcAmount; } /// @notice Return a rate for which we can sell an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Rate function getSellRate(address _srcAddr, address _destAddr, uint _srcAmount) public override view returns (uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); if(_srcAddr == WETH_ADDRESS) { address uniswapTokenAddress = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_destAddr); return wdiv(UniswapExchangeInterface(uniswapTokenAddress).getEthToTokenInputPrice(_srcAmount), _srcAmount); } else if (_destAddr == WETH_ADDRESS) { address uniswapTokenAddress = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr); return wdiv(UniswapExchangeInterface(uniswapTokenAddress).getTokenToEthInputPrice(_srcAmount), _srcAmount); } else { uint ethBought = UniswapExchangeInterface(UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr)).getTokenToEthInputPrice(_srcAmount); return wdiv(UniswapExchangeInterface(UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_destAddr)).getEthToTokenInputPrice(ethBought), _srcAmount); } } /// @notice Return a rate for which we can buy an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint Rate function getBuyRate(address _srcAddr, address _destAddr, uint _destAmount) public override view returns (uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); if(_srcAddr == WETH_ADDRESS) { address uniswapTokenAddress = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_destAddr); return wdiv(1 ether, wdiv(UniswapExchangeInterface(uniswapTokenAddress).getEthToTokenOutputPrice(_destAmount), _destAmount)); } else if (_destAddr == WETH_ADDRESS) { address uniswapTokenAddress = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr); return wdiv(1 ether, wdiv(UniswapExchangeInterface(uniswapTokenAddress).getTokenToEthOutputPrice(_destAmount), _destAmount)); } else { uint ethNeeded = UniswapExchangeInterface(UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_destAddr)).getTokenToEthOutputPrice(_destAmount); return wdiv(1 ether, wdiv(UniswapExchangeInterface(UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr)).getEthToTokenOutputPrice(ethNeeded), _destAmount)); } } /// @notice Send any leftover tokens, we use to clear out srcTokens after buy /// @param _srcAddr Source token address function sendLeftOver(address _srcAddr) internal { msg.sender.transfer(address(this).balance); if (_srcAddr != KYBER_ETH_ADDRESS) { ERC20(_srcAddr).safeTransfer(msg.sender, ERC20(_srcAddr).balanceOf(address(this))); } } /// @notice Converts Kybers Eth address -> Weth /// @param _src Input address function ethToWethAddr(address _src) internal pure returns (address) { return _src == KYBER_ETH_ADDRESS ? WETH_ADDRESS : _src; } receive() payable external {} } contract DyDxFlashLoanTaker is DydxFlashLoanBase, ProxyPermission { address public constant WETH_ADDR = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; /// @notice Takes flash loan for _receiver /// @dev Receiver must send back WETH + 2 wei after executing transaction /// @dev Method is meant to be called from proxy and proxy will give authorization to _receiver /// @param _receiver Address of funds receiver /// @param _ethAmount ETH amount that needs to be pulled from dydx /// @param _encodedData Bytes with packed data function takeLoan(address _receiver, uint256 _ethAmount, bytes memory _encodedData) public { ISoloMargin solo = ISoloMargin(SOLO_MARGIN_ADDRESS); // Get marketId from token address uint256 marketId = _getMarketIdFromTokenAddress(WETH_ADDR); // Calculate repay amount (_amount + (2 wei)) // Approve transfer from uint256 repayAmount = _getRepaymentAmountInternal(_ethAmount); ERC20(WETH_ADDR).approve(SOLO_MARGIN_ADDRESS, repayAmount); Actions.ActionArgs[] memory operations = new Actions.ActionArgs[](3); operations[0] = _getWithdrawAction(marketId, _ethAmount, _receiver); operations[1] = _getCallAction( _encodedData, _receiver ); operations[2] = _getDepositAction(marketId, repayAmount, address(this)); Account.Info[] memory accountInfos = new Account.Info[](1); accountInfos[0] = _getAccountInfo(); givePermission(_receiver); solo.operate(accountInfos, operations); removePermission(_receiver); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "DyDxFlashLoanTaken", abi.encode(_receiver, _ethAmount, _encodedData)); } } abstract contract CTokenInterface is ERC20 { function mint(uint256 mintAmount) external virtual returns (uint256); // function mint() external virtual payable; function accrueInterest() public virtual returns (uint); function redeem(uint256 redeemTokens) external virtual returns (uint256); function redeemUnderlying(uint256 redeemAmount) external virtual returns (uint256); function borrow(uint256 borrowAmount) external virtual returns (uint256); function repayBorrow(uint256 repayAmount) external virtual returns (uint256); function repayBorrow() external virtual payable; function repayBorrowBehalf(address borrower, uint256 repayAmount) external virtual returns (uint256); function repayBorrowBehalf(address borrower) external virtual payable; function liquidateBorrow(address borrower, uint256 repayAmount, address cTokenCollateral) external virtual returns (uint256); function liquidateBorrow(address borrower, address cTokenCollateral) external virtual payable; function exchangeRateCurrent() external virtual returns (uint256); function supplyRatePerBlock() external virtual returns (uint256); function borrowRatePerBlock() external virtual returns (uint256); function totalReserves() external virtual returns (uint256); function reserveFactorMantissa() external virtual returns (uint256); function borrowBalanceCurrent(address account) external virtual returns (uint256); function totalBorrowsCurrent() external virtual returns (uint256); function getCash() external virtual returns (uint256); function balanceOfUnderlying(address owner) external virtual returns (uint256); function underlying() external virtual returns (address); function getAccountSnapshot(address account) external virtual view returns (uint, uint, uint, uint); } abstract contract ISubscriptionsV2 is StaticV2 { function getOwner(uint _cdpId) external view virtual returns(address); function getSubscribedInfo(uint _cdpId) public view virtual returns(bool, uint128, uint128, uint128, uint128, address, uint coll, uint debt); function getCdpHolder(uint _cdpId) public view virtual returns (bool subscribed, CdpHolder memory); } contract MCDMonitorV2 is DSMath, AdminAuth, GasBurner, StaticV2 { uint public REPAY_GAS_TOKEN = 25; uint public BOOST_GAS_TOKEN = 25; uint public MAX_GAS_PRICE = 200000000000; // 200 gwei uint public REPAY_GAS_COST = 2500000; uint public BOOST_GAS_COST = 2500000; MCDMonitorProxyV2 public monitorProxyContract; ISubscriptionsV2 public subscriptionsContract; address public mcdSaverTakerAddress; address public constant BOT_REGISTRY_ADDRESS = 0x637726f8b08a7ABE3aE3aCaB01A80E2d8ddeF77B; Manager public manager = Manager(0x5ef30b9986345249bc32d8928B7ee64DE9435E39); Vat public vat = Vat(0x35D1b3F3D7966A1DFe207aa4514C12a259A0492B); Spotter public spotter = Spotter(0x65C79fcB50Ca1594B025960e539eD7A9a6D434A3); DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); modifier onlyApproved() { require(BotRegistry(BOT_REGISTRY_ADDRESS).botList(msg.sender), "Not auth bot"); _; } constructor(address _monitorProxy, address _subscriptions, address _mcdSaverTakerAddress) public { monitorProxyContract = MCDMonitorProxyV2(_monitorProxy); subscriptionsContract = ISubscriptionsV2(_subscriptions); mcdSaverTakerAddress = _mcdSaverTakerAddress; } /// @notice Bots call this method to repay for user when conditions are met /// @dev If the contract ownes gas token it will try and use it for gas price reduction function repayFor( SaverExchangeCore.ExchangeData memory _exchangeData, uint _cdpId, uint _nextPrice, address _joinAddr ) public payable onlyApproved burnGas(REPAY_GAS_TOKEN) { (bool isAllowed, uint ratioBefore) = canCall(Method.Repay, _cdpId, _nextPrice); require(isAllowed); uint gasCost = calcGasCost(REPAY_GAS_COST); address owner = subscriptionsContract.getOwner(_cdpId); monitorProxyContract.callExecute{value: msg.value}( owner, mcdSaverTakerAddress, abi.encodeWithSignature( "repayWithLoan((address,address,uint256,uint256,uint256,address,address,bytes,uint256),uint256,uint256,address)", _exchangeData, _cdpId, gasCost, _joinAddr)); (bool isGoodRatio, uint ratioAfter) = ratioGoodAfter(Method.Repay, _cdpId, _nextPrice); require(isGoodRatio); returnEth(); logger.Log(address(this), owner, "AutomaticMCDRepay", abi.encode(ratioBefore, ratioAfter)); } /// @notice Bots call this method to boost for user when conditions are met /// @dev If the contract ownes gas token it will try and use it for gas price reduction function boostFor( SaverExchangeCore.ExchangeData memory _exchangeData, uint _cdpId, uint _nextPrice, address _joinAddr ) public payable onlyApproved burnGas(BOOST_GAS_TOKEN) { (bool isAllowed, uint ratioBefore) = canCall(Method.Boost, _cdpId, _nextPrice); require(isAllowed); uint gasCost = calcGasCost(BOOST_GAS_COST); address owner = subscriptionsContract.getOwner(_cdpId); monitorProxyContract.callExecute{value: msg.value}( owner, mcdSaverTakerAddress, abi.encodeWithSignature( "boostWithLoan((address,address,uint256,uint256,uint256,address,address,bytes,uint256),uint256,uint256,address)", _exchangeData, _cdpId, gasCost, _joinAddr)); (bool isGoodRatio, uint ratioAfter) = ratioGoodAfter(Method.Boost, _cdpId, _nextPrice); require(isGoodRatio); returnEth(); logger.Log(address(this), owner, "AutomaticMCDBoost", abi.encode(ratioBefore, ratioAfter)); } /******************* INTERNAL METHODS ********************************/ function returnEth() internal { // return if some eth left if (address(this).balance > 0) { msg.sender.transfer(address(this).balance); } } /******************* STATIC METHODS ********************************/ /// @notice Returns an address that owns the CDP /// @param _cdpId Id of the CDP function getOwner(uint _cdpId) public view returns(address) { return manager.owns(_cdpId); } /// @notice Gets CDP info (collateral, debt) /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP function getCdpInfo(uint _cdpId, bytes32 _ilk) public view returns (uint, uint) { address urn = manager.urns(_cdpId); (uint collateral, uint debt) = vat.urns(_ilk, urn); (,uint rate,,,) = vat.ilks(_ilk); return (collateral, rmul(debt, rate)); } /// @notice Gets a price of the asset /// @param _ilk Ilk of the CDP function getPrice(bytes32 _ilk) public view returns (uint) { (, uint mat) = spotter.ilks(_ilk); (,,uint spot,,) = vat.ilks(_ilk); return rmul(rmul(spot, spotter.par()), mat); } /// @notice Gets CDP ratio /// @param _cdpId Id of the CDP /// @param _nextPrice Next price for user function getRatio(uint _cdpId, uint _nextPrice) public view returns (uint) { bytes32 ilk = manager.ilks(_cdpId); uint price = (_nextPrice == 0) ? getPrice(ilk) : _nextPrice; (uint collateral, uint debt) = getCdpInfo(_cdpId, ilk); if (debt == 0) return 0; return rdiv(wmul(collateral, price), debt) / (10 ** 18); } /// @notice Checks if Boost/Repay could be triggered for the CDP /// @dev Called by MCDMonitor to enforce the min/max check function canCall(Method _method, uint _cdpId, uint _nextPrice) public view returns(bool, uint) { bool subscribed; CdpHolder memory holder; (subscribed, holder) = subscriptionsContract.getCdpHolder(_cdpId); // check if cdp is subscribed if (!subscribed) return (false, 0); // check if using next price is allowed if (_nextPrice > 0 && !holder.nextPriceEnabled) return (false, 0); // check if boost and boost allowed if (_method == Method.Boost && !holder.boostEnabled) return (false, 0); // check if owner is still owner if (getOwner(_cdpId) != holder.owner) return (false, 0); uint currRatio = getRatio(_cdpId, _nextPrice); if (_method == Method.Repay) { return (currRatio < holder.minRatio, currRatio); } else if (_method == Method.Boost) { return (currRatio > holder.maxRatio, currRatio); } } /// @dev After the Boost/Repay check if the ratio doesn't trigger another call function ratioGoodAfter(Method _method, uint _cdpId, uint _nextPrice) public view returns(bool, uint) { CdpHolder memory holder; (, holder) = subscriptionsContract.getCdpHolder(_cdpId); uint currRatio = getRatio(_cdpId, _nextPrice); if (_method == Method.Repay) { return (currRatio < holder.maxRatio, currRatio); } else if (_method == Method.Boost) { return (currRatio > holder.minRatio, currRatio); } } /// @notice Calculates gas cost (in Eth) of tx /// @dev Gas price is limited to MAX_GAS_PRICE to prevent attack of draining user CDP /// @param _gasAmount Amount of gas used for the tx function calcGasCost(uint _gasAmount) public view returns (uint) { uint gasPrice = tx.gasprice <= MAX_GAS_PRICE ? tx.gasprice : MAX_GAS_PRICE; return mul(gasPrice, _gasAmount); } /******************* OWNER ONLY OPERATIONS ********************************/ /// @notice Allows owner to change gas cost for boost operation, but only up to 3 millions /// @param _gasCost New gas cost for boost method function changeBoostGasCost(uint _gasCost) public onlyOwner { require(_gasCost < 3000000); BOOST_GAS_COST = _gasCost; } /// @notice Allows owner to change gas cost for repay operation, but only up to 3 millions /// @param _gasCost New gas cost for repay method function changeRepayGasCost(uint _gasCost) public onlyOwner { require(_gasCost < 3000000); REPAY_GAS_COST = _gasCost; } /// @notice Allows owner to change max gas price /// @param _maxGasPrice New max gas price function changeMaxGasPrice(uint _maxGasPrice) public onlyOwner { require(_maxGasPrice < 500000000000); MAX_GAS_PRICE = _maxGasPrice; } /// @notice Allows owner to change the amount of gas token burned per function call /// @param _gasAmount Amount of gas token /// @param _isRepay Flag to know for which function we are setting the gas token amount function changeGasTokenAmount(uint _gasAmount, bool _isRepay) public onlyOwner { if (_isRepay) { REPAY_GAS_TOKEN = _gasAmount; } else { BOOST_GAS_TOKEN = _gasAmount; } } } contract MCDCloseFlashLoan is SaverExchangeCore, MCDSaverProxyHelper, FlashLoanReceiverBase, AdminAuth { ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); uint public constant SERVICE_FEE = 400; // 0.25% Fee bytes32 internal constant ETH_ILK = 0x4554482d41000000000000000000000000000000000000000000000000000000; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; address public constant DAI_JOIN_ADDRESS = 0x9759A6Ac90977b93B58547b4A71c78317f391A28; address public constant ETH_JOIN_ADDRESS = 0x2F0b23f53734252Bda2277357e97e1517d6B042A; address public constant SPOTTER_ADDRESS = 0x65C79fcB50Ca1594B025960e539eD7A9a6D434A3; address public constant VAT_ADDRESS = 0x35D1b3F3D7966A1DFe207aa4514C12a259A0492B; Manager public constant manager = Manager(0x5ef30b9986345249bc32d8928B7ee64DE9435E39); DaiJoin public constant daiJoin = DaiJoin(DAI_JOIN_ADDRESS); Spotter public constant spotter = Spotter(SPOTTER_ADDRESS); Vat public constant vat = Vat(VAT_ADDRESS); struct CloseData { uint cdpId; uint collAmount; uint daiAmount; uint minAccepted; address joinAddr; address proxy; uint flFee; bool toDai; address reserve; uint amount; } constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public {} function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { ( uint[8] memory numData, address[5] memory addrData, bytes memory callData, address proxy, bool toDai ) = abi.decode(_params, (uint256[8],address[5],bytes,address,bool)); ExchangeData memory exchangeData = ExchangeData({ srcAddr: addrData[0], destAddr: addrData[1], srcAmount: numData[4], destAmount: numData[5], minPrice: numData[6], wrapper: addrData[3], exchangeAddr: addrData[2], callData: callData, price0x: numData[7] }); CloseData memory closeData = CloseData({ cdpId: numData[0], collAmount: numData[1], daiAmount: numData[2], minAccepted: numData[3], joinAddr: addrData[4], proxy: proxy, flFee: _fee, toDai: toDai, reserve: _reserve, amount: _amount }); address user = DSProxy(payable(closeData.proxy)).owner(); closeCDP(closeData, exchangeData, user); } function closeCDP( CloseData memory _closeData, ExchangeData memory _exchangeData, address _user ) internal { paybackDebt(_closeData.cdpId, manager.ilks(_closeData.cdpId), _closeData.daiAmount); // payback whole debt drawMaxCollateral(_closeData.cdpId, _closeData.joinAddr, _closeData.collAmount); // draw whole collateral uint daiSwaped = 0; uint dfsFee = 0; if (_closeData.toDai) { _exchangeData.srcAmount = _closeData.collAmount; (, daiSwaped) = _sell(_exchangeData); dfsFee = getFee(daiSwaped, _user); } else { dfsFee = getFee(_closeData.daiAmount, _user); _exchangeData.destAmount = (_closeData.daiAmount + _closeData.flFee + dfsFee); (, daiSwaped) = _buy(_exchangeData); } takeFee(dfsFee); address tokenAddr = getVaultCollAddr(_closeData.joinAddr); if (_closeData.toDai) { tokenAddr = DAI_ADDRESS; } require(getBalance(tokenAddr) >= _closeData.minAccepted, "Below min. number of eth specified"); transferFundsBackToPoolInternal(_closeData.reserve, _closeData.amount.add(_closeData.flFee)); sendLeftover(tokenAddr, DAI_ADDRESS, payable(_user)); } function drawMaxCollateral(uint _cdpId, address _joinAddr, uint _amount) internal returns (uint) { manager.frob(_cdpId, -toPositiveInt(_amount), 0); manager.flux(_cdpId, address(this), _amount); uint joinAmount = _amount; if (Join(_joinAddr).dec() != 18) { joinAmount = _amount / (10 ** (18 - Join(_joinAddr).dec())); } Join(_joinAddr).exit(address(this), joinAmount); if (_joinAddr == ETH_JOIN_ADDRESS) { Join(_joinAddr).gem().withdraw(joinAmount); // Weth -> Eth } return joinAmount; } function paybackDebt(uint _cdpId, bytes32 _ilk, uint _daiAmount) internal { address urn = manager.urns(_cdpId); daiJoin.dai().approve(DAI_JOIN_ADDRESS, _daiAmount); daiJoin.join(urn, _daiAmount); manager.frob(_cdpId, 0, normalizePaybackAmount(VAT_ADDRESS, urn, _ilk)); } function takeFee(uint _feeAmount) internal returns (uint) { ERC20(DAI_ADDRESS).transfer(WALLET_ID, _feeAmount); } function getFee(uint _amount, address _owner) internal view returns (uint feeAmount) { uint fee = SERVICE_FEE; if (Discount(DISCOUNT_ADDRESS).isCustomFeeSet(_owner)) { fee = Discount(DISCOUNT_ADDRESS).getCustomServiceFee(_owner); } feeAmount = (fee == 0) ? 0 : (_amount / fee); // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } } function getVaultCollAddr(address _joinAddr) internal view returns (address) { address tokenAddr = address(Join(_joinAddr).gem()); if (tokenAddr == WETH_ADDRESS) { return KYBER_ETH_ADDRESS; } return tokenAddr; } function getPrice(bytes32 _ilk) public view returns (uint256) { (, uint256 mat) = spotter.ilks(_ilk); (, , uint256 spot, , ) = vat.ilks(_ilk); return rmul(rmul(spot, spotter.par()), mat); } receive() external override(FlashLoanReceiverBase, SaverExchangeCore) payable {} } contract MCDCloseTaker is MCDSaverProxyHelper { address public constant SUBSCRIPTION_ADDRESS_NEW = 0xC45d4f6B6bf41b6EdAA58B01c4298B8d9078269a; address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); // solhint-disable-next-line const-name-snakecase Manager public constant manager = Manager(0x5ef30b9986345249bc32d8928B7ee64DE9435E39); address public constant SPOTTER_ADDRESS = 0x65C79fcB50Ca1594B025960e539eD7A9a6D434A3; address public constant VAT_ADDRESS = 0x35D1b3F3D7966A1DFe207aa4514C12a259A0492B; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; // solhint-disable-next-line const-name-snakecase DefisaverLogger public constant logger = DefisaverLogger(DEFISAVER_LOGGER); struct CloseData { uint cdpId; address joinAddr; uint collAmount; uint daiAmount; uint minAccepted; bool wholeDebt; bool toDai; } Vat public constant vat = Vat(VAT_ADDRESS); Spotter public constant spotter = Spotter(SPOTTER_ADDRESS); function closeWithLoan( SaverExchangeCore.ExchangeData memory _exchangeData, CloseData memory _closeData, address payable mcdCloseFlashLoan ) public payable { mcdCloseFlashLoan.transfer(msg.value); // 0x fee if (_closeData.wholeDebt) { _closeData.daiAmount = getAllDebt( VAT_ADDRESS, manager.urns(_closeData.cdpId), manager.urns(_closeData.cdpId), manager.ilks(_closeData.cdpId) ); (_closeData.collAmount, ) = getCdpInfo(manager, _closeData.cdpId, manager.ilks(_closeData.cdpId)); } manager.cdpAllow(_closeData.cdpId, mcdCloseFlashLoan, 1); (uint[8] memory numData, address[5] memory addrData, bytes memory callData) = _packData(_closeData, _exchangeData); bytes memory paramsData = abi.encode(numData, addrData, callData, address(this), _closeData.toDai); lendingPool.flashLoan(mcdCloseFlashLoan, DAI_ADDRESS, _closeData.daiAmount, paramsData); manager.cdpAllow(_closeData.cdpId, mcdCloseFlashLoan, 0); // If sub. to automatic protection unsubscribe unsubscribe(SUBSCRIPTION_ADDRESS_NEW, _closeData.cdpId); logger.Log(address(this), msg.sender, "MCDClose", abi.encode(_closeData.cdpId, _closeData.collAmount, _closeData.daiAmount, _closeData.toDai)); } /// @notice Gets the maximum amount of debt available to generate /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP function getMaxDebt(uint256 _cdpId, bytes32 _ilk) public view returns (uint256) { uint256 price = getPrice(_ilk); (, uint256 mat) = spotter.ilks(_ilk); (uint256 collateral, uint256 debt) = getCdpInfo(manager, _cdpId, _ilk); return sub(wdiv(wmul(collateral, price), mat), debt); } /// @notice Gets a price of the asset /// @param _ilk Ilk of the CDP function getPrice(bytes32 _ilk) public view returns (uint256) { (, uint256 mat) = spotter.ilks(_ilk); (, , uint256 spot, , ) = vat.ilks(_ilk); return rmul(rmul(spot, spotter.par()), mat); } function unsubscribe(address _subContract, uint _cdpId) internal { (, bool isSubscribed) = IMCDSubscriptions(_subContract).subscribersPos(_cdpId); if (isSubscribed) { IMCDSubscriptions(_subContract).unsubscribe(_cdpId); } } function _packData( CloseData memory _closeData, SaverExchangeCore.ExchangeData memory exchangeData ) internal pure returns (uint[8] memory numData, address[5] memory addrData, bytes memory callData) { numData = [ _closeData.cdpId, _closeData.collAmount, _closeData.daiAmount, _closeData.minAccepted, exchangeData.srcAmount, exchangeData.destAmount, exchangeData.minPrice, exchangeData.price0x ]; addrData = [ exchangeData.srcAddr, exchangeData.destAddr, exchangeData.exchangeAddr, exchangeData.wrapper, _closeData.joinAddr ]; callData = exchangeData.callData; } } contract MCDCreateFlashLoan is SaverExchangeCore, AdminAuth, FlashLoanReceiverBase { address public constant CREATE_PROXY_ACTIONS = 0x6d0984E80a86f26c0dd564ca0CF74a8E9Da03305; uint public constant SERVICE_FEE = 400; // 0.25% Fee address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); address public constant ETH_JOIN_ADDRESS = 0x2F0b23f53734252Bda2277357e97e1517d6B042A; address public constant DAI_JOIN_ADDRESS = 0x9759A6Ac90977b93B58547b4A71c78317f391A28; address public constant JUG_ADDRESS = 0x19c0976f590D67707E62397C87829d896Dc0f1F1; address public constant MANAGER_ADDRESS = 0x5ef30b9986345249bc32d8928B7ee64DE9435E39; constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public {} function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { //check the contract has the specified balance require(_amount <= getBalanceInternal(address(this), _reserve), "Invalid balance for the contract"); ( uint[6] memory numData, address[5] memory addrData, bytes memory callData, address proxy ) = abi.decode(_params, (uint256[6],address[5],bytes,address)); ExchangeData memory exchangeData = ExchangeData({ srcAddr: addrData[0], destAddr: addrData[1], srcAmount: numData[2], destAmount: numData[3], minPrice: numData[4], wrapper: addrData[3], exchangeAddr: addrData[2], callData: callData, price0x: numData[5] }); openAndLeverage(numData[0], numData[1] + _fee, addrData[4], proxy, exchangeData); transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } } function openAndLeverage( uint _collAmount, uint _daiAmountAndFee, address _joinAddr, address _proxy, ExchangeData memory _exchangeData ) public { uint dfsFee = getFee(_exchangeData.srcAmount, DSProxy(payable(_proxy)).owner()); _exchangeData.srcAmount = (_exchangeData.srcAmount - dfsFee); (, uint256 collSwaped) = _sell(_exchangeData); bytes32 ilk = Join(_joinAddr).ilk(); if (_joinAddr == ETH_JOIN_ADDRESS) { MCDCreateProxyActions(CREATE_PROXY_ACTIONS).openLockETHAndDraw{value: address(this).balance}( MANAGER_ADDRESS, JUG_ADDRESS, ETH_JOIN_ADDRESS, DAI_JOIN_ADDRESS, ilk, _daiAmountAndFee, _proxy ); } else { ERC20(address(Join(_joinAddr).gem())).safeApprove(CREATE_PROXY_ACTIONS, 0); ERC20(address(Join(_joinAddr).gem())).safeApprove(CREATE_PROXY_ACTIONS, uint256(-1)); MCDCreateProxyActions(CREATE_PROXY_ACTIONS).openLockGemAndDraw( MANAGER_ADDRESS, JUG_ADDRESS, _joinAddr, DAI_JOIN_ADDRESS, ilk, (_collAmount + collSwaped), _daiAmountAndFee, true, _proxy ); } } function getFee(uint _amount, address _owner) internal returns (uint feeAmount) { uint fee = SERVICE_FEE; if (Discount(DISCOUNT_ADDRESS).isCustomFeeSet(_owner)) { fee = Discount(DISCOUNT_ADDRESS).getCustomServiceFee(_owner); } feeAmount = (fee == 0) ? 0 : (_amount / fee); // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } ERC20(DAI_ADDRESS).transfer(WALLET_ID, feeAmount); } receive() external override(FlashLoanReceiverBase, SaverExchangeCore) payable {} } contract MCDSaverProxy is SaverExchangeCore, MCDSaverProxyHelper { uint public constant MANUAL_SERVICE_FEE = 400; // 0.25% Fee uint public constant AUTOMATIC_SERVICE_FEE = 333; // 0.3% Fee bytes32 public constant ETH_ILK = 0x4554482d41000000000000000000000000000000000000000000000000000000; address public constant MANAGER_ADDRESS = 0x5ef30b9986345249bc32d8928B7ee64DE9435E39; address public constant VAT_ADDRESS = 0x35D1b3F3D7966A1DFe207aa4514C12a259A0492B; address public constant SPOTTER_ADDRESS = 0x65C79fcB50Ca1594B025960e539eD7A9a6D434A3; address public constant DAI_JOIN_ADDRESS = 0x9759A6Ac90977b93B58547b4A71c78317f391A28; address public constant JUG_ADDRESS = 0x19c0976f590D67707E62397C87829d896Dc0f1F1; address public constant ETH_JOIN_ADDRESS = 0x2F0b23f53734252Bda2277357e97e1517d6B042A; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; address public constant BOT_REGISTRY_ADDRESS = 0x637726f8b08a7ABE3aE3aCaB01A80E2d8ddeF77B; Manager public constant manager = Manager(MANAGER_ADDRESS); Vat public constant vat = Vat(VAT_ADDRESS); DaiJoin public constant daiJoin = DaiJoin(DAI_JOIN_ADDRESS); Spotter public constant spotter = Spotter(SPOTTER_ADDRESS); DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); /// @notice Repay - draws collateral, converts to Dai and repays the debt /// @dev Must be called by the DSProxy contract that owns the CDP function repay( SaverExchangeCore.ExchangeData memory _exchangeData, uint _cdpId, uint _gasCost, address _joinAddr ) public payable { address owner = getOwner(manager, _cdpId); bytes32 ilk = manager.ilks(_cdpId); drawCollateral(_cdpId, _joinAddr, _exchangeData.srcAmount); (, uint daiAmount) = _sell(_exchangeData); uint daiAfterFee = sub(daiAmount, getFee(daiAmount, _gasCost, owner)); paybackDebt(_cdpId, ilk, daiAfterFee, owner); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } logger.Log(address(this), msg.sender, "MCDRepay", abi.encode(_cdpId, owner, _exchangeData.srcAmount, daiAmount)); } /// @notice Boost - draws Dai, converts to collateral and adds to CDP /// @dev Must be called by the DSProxy contract that owns the CDP function boost( SaverExchangeCore.ExchangeData memory _exchangeData, uint _cdpId, uint _gasCost, address _joinAddr ) public payable { address owner = getOwner(manager, _cdpId); bytes32 ilk = manager.ilks(_cdpId); uint daiDrawn = drawDai(_cdpId, ilk, _exchangeData.srcAmount); uint daiAfterFee = sub(daiDrawn, getFee(daiDrawn, _gasCost, owner)); _exchangeData.srcAmount = daiAfterFee; (, uint swapedColl) = _sell(_exchangeData); addCollateral(_cdpId, _joinAddr, swapedColl); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } logger.Log(address(this), msg.sender, "MCDBoost", abi.encode(_cdpId, owner, _exchangeData.srcAmount, swapedColl)); } /// @notice Draws Dai from the CDP /// @dev If _daiAmount is bigger than max available we'll draw max /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP /// @param _daiAmount Amount of Dai to draw function drawDai(uint _cdpId, bytes32 _ilk, uint _daiAmount) internal returns (uint) { uint rate = Jug(JUG_ADDRESS).drip(_ilk); uint daiVatBalance = vat.dai(manager.urns(_cdpId)); uint maxAmount = getMaxDebt(_cdpId, _ilk); if (_daiAmount >= maxAmount) { _daiAmount = sub(maxAmount, 1); } manager.frob(_cdpId, int(0), normalizeDrawAmount(_daiAmount, rate, daiVatBalance)); manager.move(_cdpId, address(this), toRad(_daiAmount)); if (vat.can(address(this), address(DAI_JOIN_ADDRESS)) == 0) { vat.hope(DAI_JOIN_ADDRESS); } DaiJoin(DAI_JOIN_ADDRESS).exit(address(this), _daiAmount); return _daiAmount; } /// @notice Adds collateral to the CDP /// @param _cdpId Id of the CDP /// @param _joinAddr Address of the join contract for the CDP collateral /// @param _amount Amount of collateral to add function addCollateral(uint _cdpId, address _joinAddr, uint _amount) internal { int convertAmount = 0; if (_joinAddr == ETH_JOIN_ADDRESS) { Join(_joinAddr).gem().deposit{value: _amount}(); convertAmount = toPositiveInt(_amount); } else { convertAmount = toPositiveInt(convertTo18(_joinAddr, _amount)); } ERC20(address(Join(_joinAddr).gem())).safeApprove(_joinAddr, 0); ERC20(address(Join(_joinAddr).gem())).safeApprove(_joinAddr, _amount); Join(_joinAddr).join(address(this), _amount); vat.frob( manager.ilks(_cdpId), manager.urns(_cdpId), address(this), address(this), convertAmount, 0 ); } /// @notice Draws collateral and returns it to DSProxy /// @dev If _amount is bigger than max available we'll draw max /// @param _cdpId Id of the CDP /// @param _joinAddr Address of the join contract for the CDP collateral /// @param _amount Amount of collateral to draw function drawCollateral(uint _cdpId, address _joinAddr, uint _amount) internal returns (uint) { uint frobAmount = _amount; if (Join(_joinAddr).dec() != 18) { frobAmount = _amount * (10 ** (18 - Join(_joinAddr).dec())); } manager.frob(_cdpId, -toPositiveInt(frobAmount), 0); manager.flux(_cdpId, address(this), frobAmount); Join(_joinAddr).exit(address(this), _amount); if (_joinAddr == ETH_JOIN_ADDRESS) { Join(_joinAddr).gem().withdraw(_amount); // Weth -> Eth } return _amount; } /// @notice Paybacks Dai debt /// @dev If the _daiAmount is bigger than the whole debt, returns extra Dai /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP /// @param _daiAmount Amount of Dai to payback /// @param _owner Address that owns the DSProxy that owns the CDP function paybackDebt(uint _cdpId, bytes32 _ilk, uint _daiAmount, address _owner) internal { address urn = manager.urns(_cdpId); uint wholeDebt = getAllDebt(VAT_ADDRESS, urn, urn, _ilk); if (_daiAmount > wholeDebt) { ERC20(DAI_ADDRESS).transfer(_owner, sub(_daiAmount, wholeDebt)); _daiAmount = wholeDebt; } if (ERC20(DAI_ADDRESS).allowance(address(this), DAI_JOIN_ADDRESS) == 0) { ERC20(DAI_ADDRESS).approve(DAI_JOIN_ADDRESS, uint(-1)); } daiJoin.join(urn, _daiAmount); manager.frob(_cdpId, 0, normalizePaybackAmount(VAT_ADDRESS, urn, _ilk)); } /// @notice Calculates the fee amount /// @param _amount Dai amount that is converted /// @param _gasCost Used for Monitor, estimated gas cost of tx /// @param _owner The address that controlls the DSProxy that owns the CDP function getFee(uint _amount, uint _gasCost, address _owner) internal returns (uint feeAmount) { uint fee = MANUAL_SERVICE_FEE; if (BotRegistry(BOT_REGISTRY_ADDRESS).botList(tx.origin)) { fee = AUTOMATIC_SERVICE_FEE; } if (Discount(DISCOUNT_ADDRESS).isCustomFeeSet(_owner)) { fee = Discount(DISCOUNT_ADDRESS).getCustomServiceFee(_owner); } feeAmount = (fee == 0) ? 0 : (_amount / fee); if (_gasCost != 0) { uint ethDaiPrice = getPrice(ETH_ILK); _gasCost = rmul(_gasCost, ethDaiPrice); feeAmount = add(feeAmount, _gasCost); } // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } ERC20(DAI_ADDRESS).transfer(WALLET_ID, feeAmount); } /// @notice Gets the maximum amount of collateral available to draw /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP /// @param _joinAddr Joind address of collateral /// @dev Substracts 10 wei to aviod rounding error later on function getMaxCollateral(uint _cdpId, bytes32 _ilk, address _joinAddr) public view returns (uint) { uint price = getPrice(_ilk); (uint collateral, uint debt) = getCdpInfo(manager, _cdpId, _ilk); (, uint mat) = Spotter(SPOTTER_ADDRESS).ilks(_ilk); uint maxCollateral = sub(sub(collateral, (div(mul(mat, debt), price))), 10); uint normalizeMaxCollateral = maxCollateral; if (Join(_joinAddr).dec() != 18) { normalizeMaxCollateral = maxCollateral / (10 ** (18 - Join(_joinAddr).dec())); } return normalizeMaxCollateral; } /// @notice Gets the maximum amount of debt available to generate /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP /// @dev Substracts 10 wei to aviod rounding error later on function getMaxDebt(uint _cdpId, bytes32 _ilk) public virtual view returns (uint) { uint price = getPrice(_ilk); (, uint mat) = spotter.ilks(_ilk); (uint collateral, uint debt) = getCdpInfo(manager, _cdpId, _ilk); return sub(sub(div(mul(collateral, price), mat), debt), 10); } /// @notice Gets a price of the asset /// @param _ilk Ilk of the CDP function getPrice(bytes32 _ilk) public view returns (uint) { (, uint mat) = spotter.ilks(_ilk); (,,uint spot,,) = vat.ilks(_ilk); return rmul(rmul(spot, spotter.par()), mat); } /// @notice Gets CDP ratio /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP function getRatio(uint _cdpId, bytes32 _ilk) public view returns (uint) { uint price = getPrice( _ilk); (uint collateral, uint debt) = getCdpInfo(manager, _cdpId, _ilk); if (debt == 0) return 0; return rdiv(wmul(collateral, price), debt); } /// @notice Gets CDP info (collateral, debt, price, ilk) /// @param _cdpId Id of the CDP function getCdpDetailedInfo(uint _cdpId) public view returns (uint collateral, uint debt, uint price, bytes32 ilk) { address urn = manager.urns(_cdpId); ilk = manager.ilks(_cdpId); (collateral, debt) = vat.urns(ilk, urn); (,uint rate,,,) = vat.ilks(ilk); debt = rmul(debt, rate); price = getPrice(ilk); } } contract MCDSaverTaker is MCDSaverProxy, GasBurner { address payable public constant MCD_SAVER_FLASH_LOAN = 0x28e444b53a9e7E3F6fFe50E93b18dCce7838551F; address public constant AAVE_POOL_CORE = 0x3dfd23A6c5E8BbcFc9581d2E864a68feb6a076d3; ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); function boostWithLoan( SaverExchangeCore.ExchangeData memory _exchangeData, uint _cdpId, uint _gasCost, address _joinAddr ) public payable burnGas(25) { uint256 maxDebt = getMaxDebt(_cdpId, manager.ilks(_cdpId)); if (maxDebt >= _exchangeData.srcAmount) { boost(_exchangeData, _cdpId, _gasCost, _joinAddr); return; } MCD_SAVER_FLASH_LOAN.transfer(msg.value); // 0x fee uint256 loanAmount = sub(_exchangeData.srcAmount, maxDebt); uint maxLiq = getAvailableLiquidity(DAI_JOIN_ADDRESS); loanAmount = loanAmount > maxLiq ? maxLiq : loanAmount; manager.cdpAllow(_cdpId, MCD_SAVER_FLASH_LOAN, 1); bytes memory paramsData = abi.encode(packExchangeData(_exchangeData), _cdpId, _gasCost, _joinAddr, false); lendingPool.flashLoan(MCD_SAVER_FLASH_LOAN, DAI_ADDRESS, loanAmount, paramsData); manager.cdpAllow(_cdpId, MCD_SAVER_FLASH_LOAN, 0); } function repayWithLoan( SaverExchangeCore.ExchangeData memory _exchangeData, uint _cdpId, uint _gasCost, address _joinAddr ) public payable burnGas(25) { uint256 maxColl = getMaxCollateral(_cdpId, manager.ilks(_cdpId), _joinAddr); if (maxColl >= _exchangeData.srcAmount) { repay(_exchangeData, _cdpId, _gasCost, _joinAddr); return; } MCD_SAVER_FLASH_LOAN.transfer(msg.value); // 0x fee uint256 loanAmount = sub(_exchangeData.srcAmount, maxColl); uint maxLiq = getAvailableLiquidity(_joinAddr); loanAmount = loanAmount > maxLiq ? maxLiq : loanAmount; manager.cdpAllow(_cdpId, MCD_SAVER_FLASH_LOAN, 1); bytes memory paramsData = abi.encode(packExchangeData(_exchangeData), _cdpId, _gasCost, _joinAddr, true); lendingPool.flashLoan(MCD_SAVER_FLASH_LOAN, getAaveCollAddr(_joinAddr), loanAmount, paramsData); manager.cdpAllow(_cdpId, MCD_SAVER_FLASH_LOAN, 0); } /// @notice Gets the maximum amount of debt available to generate /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP function getMaxDebt(uint256 _cdpId, bytes32 _ilk) public override view returns (uint256) { uint256 price = getPrice(_ilk); (, uint256 mat) = spotter.ilks(_ilk); (uint256 collateral, uint256 debt) = getCdpInfo(manager, _cdpId, _ilk); return sub(wdiv(wmul(collateral, price), mat), debt); } function getAaveCollAddr(address _joinAddr) internal view returns (address) { if (_joinAddr == 0x2F0b23f53734252Bda2277357e97e1517d6B042A || _joinAddr == 0x775787933e92b709f2a3C70aa87999696e74A9F8) { return KYBER_ETH_ADDRESS; } else if (_joinAddr == DAI_JOIN_ADDRESS) { return DAI_ADDRESS; } else { return getCollateralAddr(_joinAddr); } } function getAvailableLiquidity(address _joinAddr) internal view returns (uint liquidity) { address tokenAddr = getAaveCollAddr(_joinAddr); if (tokenAddr == KYBER_ETH_ADDRESS) { liquidity = AAVE_POOL_CORE.balance; } else { liquidity = ERC20(tokenAddr).balanceOf(AAVE_POOL_CORE); } } function _packData( uint _cdpId, uint _gasCost, address _joinAddr, SaverExchangeCore.ExchangeData memory exchangeData ) internal pure returns (uint[6] memory numData, address[5] memory addrData, bytes memory callData) { numData = [ exchangeData.srcAmount, exchangeData.destAmount, exchangeData.minPrice, exchangeData.price0x, _cdpId, _gasCost ]; addrData = [ exchangeData.srcAddr, exchangeData.destAddr, exchangeData.exchangeAddr, exchangeData.wrapper, _joinAddr ]; callData = exchangeData.callData; } } contract SavingsProxy is DSRSavingsProtocol, CompoundSavingsProtocol { address public constant ADAI_ADDRESS = 0xfC1E690f61EFd961294b3e1Ce3313fBD8aa4f85d; address public constant SAVINGS_DYDX_ADDRESS = 0x03b1565e070df392e48e7a8e01798C4B00E534A5; address public constant SAVINGS_AAVE_ADDRESS = 0x535B9035E9bA8D7efe0FeAEac885fb65b303E37C; address public constant NEW_IDAI_ADDRESS = 0x493C57C4763932315A328269E1ADaD09653B9081; address public constant COMP_ADDRESS = 0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B; address public constant SAVINGS_LOGGER_ADDRESS = 0x89b3635BD2bAD145C6f92E82C9e83f06D5654984; address public constant SOLO_MARGIN_ADDRESS = 0x1E0447b19BB6EcFdAe1e4AE1694b0C3659614e4e; enum SavingsProtocol {Compound, Dydx, Fulcrum, Dsr, Aave} function deposit(SavingsProtocol _protocol, uint256 _amount) public { if (_protocol == SavingsProtocol.Dsr) { dsrDeposit(_amount, true); } else if (_protocol == SavingsProtocol.Compound) { compDeposit(msg.sender, _amount); } else { _deposit(_protocol, _amount, true); } SavingsLogger(SAVINGS_LOGGER_ADDRESS).logDeposit(msg.sender, uint8(_protocol), _amount); } function withdraw(SavingsProtocol _protocol, uint256 _amount) public { if (_protocol == SavingsProtocol.Dsr) { dsrWithdraw(_amount, true); } else if (_protocol == SavingsProtocol.Compound) { compWithdraw(msg.sender, _amount); } else { _withdraw(_protocol, _amount, true); } SavingsLogger(SAVINGS_LOGGER_ADDRESS).logWithdraw(msg.sender, uint8(_protocol), _amount); } function swap(SavingsProtocol _from, SavingsProtocol _to, uint256 _amount) public { if (_from == SavingsProtocol.Dsr) { dsrWithdraw(_amount, false); } else if (_from == SavingsProtocol.Compound) { compWithdraw(msg.sender, _amount); } else { _withdraw(_from, _amount, false); } // possible to withdraw 1-2 wei less than actual amount due to division precision // so we deposit all amount on DSProxy uint256 amountToDeposit = ERC20(DAI_ADDRESS).balanceOf(address(this)); if (_to == SavingsProtocol.Dsr) { dsrDeposit(amountToDeposit, false); } else if (_from == SavingsProtocol.Compound) { compDeposit(msg.sender, _amount); } else { _deposit(_to, amountToDeposit, false); } SavingsLogger(SAVINGS_LOGGER_ADDRESS).logSwap( msg.sender, uint8(_from), uint8(_to), _amount ); } function withdrawDai() public { ERC20(DAI_ADDRESS).transfer(msg.sender, ERC20(DAI_ADDRESS).balanceOf(address(this))); } function claimComp() public { ComptrollerInterface(COMP_ADDRESS).claimComp(address(this)); } function getAddress(SavingsProtocol _protocol) public pure returns (address) { if (_protocol == SavingsProtocol.Dydx) { return SAVINGS_DYDX_ADDRESS; } if (_protocol == SavingsProtocol.Aave) { return SAVINGS_AAVE_ADDRESS; } } function _deposit(SavingsProtocol _protocol, uint256 _amount, bool _fromUser) internal { if (_fromUser) { ERC20(DAI_ADDRESS).transferFrom(msg.sender, address(this), _amount); } approveDeposit(_protocol); ProtocolInterface(getAddress(_protocol)).deposit(address(this), _amount); endAction(_protocol); } function _withdraw(SavingsProtocol _protocol, uint256 _amount, bool _toUser) public { approveWithdraw(_protocol); ProtocolInterface(getAddress(_protocol)).withdraw(address(this), _amount); endAction(_protocol); if (_toUser) { withdrawDai(); } } function endAction(SavingsProtocol _protocol) internal { if (_protocol == SavingsProtocol.Dydx) { setDydxOperator(false); } } function approveDeposit(SavingsProtocol _protocol) internal { if (_protocol == SavingsProtocol.Compound || _protocol == SavingsProtocol.Fulcrum || _protocol == SavingsProtocol.Aave) { ERC20(DAI_ADDRESS).approve(getAddress(_protocol), uint256(-1)); } if (_protocol == SavingsProtocol.Dydx) { ERC20(DAI_ADDRESS).approve(SOLO_MARGIN_ADDRESS, uint256(-1)); setDydxOperator(true); } } function approveWithdraw(SavingsProtocol _protocol) internal { if (_protocol == SavingsProtocol.Compound) { ERC20(NEW_CDAI_ADDRESS).approve(getAddress(_protocol), uint256(-1)); } if (_protocol == SavingsProtocol.Dydx) { setDydxOperator(true); } if (_protocol == SavingsProtocol.Fulcrum) { ERC20(NEW_IDAI_ADDRESS).approve(getAddress(_protocol), uint256(-1)); } if (_protocol == SavingsProtocol.Aave) { ERC20(ADAI_ADDRESS).approve(getAddress(_protocol), uint256(-1)); } } function setDydxOperator(bool _trusted) internal { ISoloMargin.OperatorArg[] memory operatorArgs = new ISoloMargin.OperatorArg[](1); operatorArgs[0] = ISoloMargin.OperatorArg({ operator: getAddress(SavingsProtocol.Dydx), trusted: _trusted }); ISoloMargin(SOLO_MARGIN_ADDRESS).setOperators(operatorArgs); } } contract LoanShifterReceiver is SaverExchangeCore, FlashLoanReceiverBase, AdminAuth { ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; ShifterRegistry public constant shifterRegistry = ShifterRegistry(0x597C52281b31B9d949a9D8fEbA08F7A2530a965e); struct ParamData { bytes proxyData1; bytes proxyData2; address proxy; address debtAddr; uint8 protocol1; uint8 protocol2; uint8 swapType; } constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public {} function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { // Format the call data for DSProxy (ParamData memory paramData, ExchangeData memory exchangeData) = packFunctionCall(_amount, _fee, _params); address protocolAddr1 = shifterRegistry.getAddr(getNameByProtocol(paramData.protocol1)); address protocolAddr2 = shifterRegistry.getAddr(getNameByProtocol(paramData.protocol2)); // Send Flash loan amount to DSProxy sendToProxy(payable(paramData.proxy), _reserve, _amount); // Execute the Close/Change debt operation DSProxyInterface(paramData.proxy).execute(protocolAddr1, paramData.proxyData1); if (paramData.swapType == 1) { // COLL_SWAP exchangeData.srcAmount = getBalance(exchangeData.srcAddr); (, uint amount) = _sell(exchangeData); sendToProxy(payable(paramData.proxy), exchangeData.destAddr, amount); } else if (paramData.swapType == 2) { // DEBT_SWAP exchangeData.destAmount = (_amount + _fee); _buy(exchangeData); // Send extra to DSProxy sendToProxy(payable(paramData.proxy), exchangeData.srcAddr, ERC20(exchangeData.srcAddr).balanceOf(address(this))); } else { // NO_SWAP just send tokens to proxy sendToProxy(payable(paramData.proxy), exchangeData.srcAddr, getBalance(exchangeData.srcAddr)); } // Execute the Open operation DSProxyInterface(paramData.proxy).execute(protocolAddr2, paramData.proxyData2); // Repay FL transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } } function packFunctionCall(uint _amount, uint _fee, bytes memory _params) internal pure returns (ParamData memory paramData, ExchangeData memory exchangeData) { ( uint[8] memory numData, // collAmount, debtAmount, id1, id2, srcAmount, destAmount, minPrice, price0x address[8] memory addrData, // addrLoan1, addrLoan2, debtAddr1, debtAddr2, srcAddr, destAddr, exchangeAddr, wrapper uint8[3] memory enumData, // fromProtocol, toProtocol, swapType bytes memory callData, address proxy ) = abi.decode(_params, (uint256[8],address[8],uint8[3],bytes,address)); bytes memory proxyData1; bytes memory proxyData2; uint openDebtAmount = (_amount + _fee); if (enumData[0] == 0) { // MAKER FROM proxyData1 = abi.encodeWithSignature("close(uint256,address,uint256,uint256)", numData[2], addrData[0], _amount, numData[0]); } else if(enumData[0] == 1) { // COMPOUND FROM if (enumData[2] == 2) { // DEBT_SWAP proxyData1 = abi.encodeWithSignature("changeDebt(address,address,uint256,uint256)", addrData[2], addrData[3], (_amount + _fee), numData[4]); } else { proxyData1 = abi.encodeWithSignature("close(address,address,uint256,uint256)", addrData[0], addrData[2], numData[0], numData[1]); } } if (enumData[1] == 0) { // MAKER TO proxyData2 = abi.encodeWithSignature("open(uint256,address,uint256)", numData[3], addrData[1], openDebtAmount); } else if(enumData[1] == 1) { // COMPOUND TO if (enumData[2] == 2) { // DEBT_SWAP proxyData2 = abi.encodeWithSignature("repayAll(address)", addrData[3]); } else { proxyData2 = abi.encodeWithSignature("open(address,address,uint256)", addrData[1], addrData[3], openDebtAmount); } } paramData = ParamData({ proxyData1: proxyData1, proxyData2: proxyData2, proxy: proxy, debtAddr: addrData[2], protocol1: enumData[0], protocol2: enumData[1], swapType: enumData[2] }); exchangeData = SaverExchangeCore.ExchangeData({ srcAddr: addrData[4], destAddr: addrData[5], srcAmount: numData[4], destAmount: numData[5], minPrice: numData[6], wrapper: addrData[7], exchangeAddr: addrData[6], callData: callData, price0x: numData[7] }); } function sendToProxy(address payable _proxy, address _reserve, uint _amount) internal { if (_reserve != ETH_ADDRESS) { ERC20(_reserve).safeTransfer(_proxy, _amount); } _proxy.transfer(address(this).balance); } function getNameByProtocol(uint8 _proto) internal pure returns (string memory) { if (_proto == 0) { return "MCD_SHIFTER"; } else if (_proto == 1) { return "COMP_SHIFTER"; } } receive() external override(FlashLoanReceiverBase, SaverExchangeCore) payable {} } contract CompShifter is CompoundSaverHelper { address public constant COMPTROLLER_ADDR = 0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B; function getWholeDebt(uint _cdpId, address _joinAddr) public virtual returns(uint loanAmount) { return CTokenInterface(_joinAddr).borrowBalanceCurrent(msg.sender); } function close( address _cCollAddr, address _cBorrowAddr, uint _collAmount, uint _debtAmount ) public { address collAddr = getUnderlyingAddr(_cCollAddr); // payback debt paybackDebt(_debtAmount, _cBorrowAddr, getUnderlyingAddr(_cBorrowAddr), tx.origin); // draw coll if (CTokenInterface(_cBorrowAddr).borrowBalanceCurrent(address(this)) == 0) { uint cTokenBalance = CTokenInterface(_cCollAddr).balanceOf(address(this)); require(CTokenInterface(_cCollAddr).redeem(cTokenBalance) == 0); } else { require(CTokenInterface(_cCollAddr).redeemUnderlying(_collAmount) == 0); } // Send back money to repay FL if (collAddr == ETH_ADDRESS) { msg.sender.transfer(address(this).balance); } else { ERC20(collAddr).transfer(msg.sender, ERC20(collAddr).balanceOf(address(this))); } } function changeDebt( address _cBorrowAddrOld, address _cBorrowAddrNew, uint _debtAmountOld, uint _debtAmountNew ) public { address borrowAddrNew = getUnderlyingAddr(_cBorrowAddrNew); // payback debt in one token paybackDebt(_debtAmountOld, _cBorrowAddrOld, getUnderlyingAddr(_cBorrowAddrOld), tx.origin); // draw debt in another one borrowCompound(_cBorrowAddrNew, _debtAmountNew); // Send back money to repay FL if (borrowAddrNew == ETH_ADDRESS) { msg.sender.transfer(address(this).balance); } else { ERC20(borrowAddrNew).transfer(msg.sender, ERC20(borrowAddrNew).balanceOf(address(this))); } } function open( address _cCollAddr, address _cBorrowAddr, uint _debtAmount ) public { address collAddr = getUnderlyingAddr(_cCollAddr); address borrowAddr = getUnderlyingAddr(_cBorrowAddr); uint collAmount = 0; if (collAddr == ETH_ADDRESS) { collAmount = address(this).balance; } else { collAmount = ERC20(collAddr).balanceOf(address(this)); } depositCompound(collAddr, _cCollAddr, collAmount); // draw debt borrowCompound(_cBorrowAddr, _debtAmount); // Send back money to repay FL if (borrowAddr == ETH_ADDRESS) { msg.sender.transfer(address(this).balance); } else { ERC20(borrowAddr).transfer(msg.sender, ERC20(borrowAddr).balanceOf(address(this))); } } function repayAll(address _cTokenAddr) public { address tokenAddr = getUnderlyingAddr(_cTokenAddr); uint amount = ERC20(tokenAddr).balanceOf(address(this)); if (amount != 0) { paybackDebt(amount, _cTokenAddr, tokenAddr, tx.origin); } } function depositCompound(address _tokenAddr, address _cTokenAddr, uint _amount) internal { approveCToken(_tokenAddr, _cTokenAddr); enterMarket(_cTokenAddr); if (_tokenAddr != ETH_ADDRESS) { require(CTokenInterface(_cTokenAddr).mint(_amount) == 0, "mint error"); } else { CEtherInterface(_cTokenAddr).mint{value: _amount}(); } } function borrowCompound(address _cTokenAddr, uint _amount) internal { enterMarket(_cTokenAddr); require(CTokenInterface(_cTokenAddr).borrow(_amount) == 0); } function enterMarket(address _cTokenAddr) public { address[] memory markets = new address[](1); markets[0] = _cTokenAddr; ComptrollerInterface(COMPTROLLER_ADDR).enterMarkets(markets); } } contract McdShifter is MCDSaverProxy { address public constant OPEN_PROXY_ACTIONS = 0x6d0984E80a86f26c0dd564ca0CF74a8E9Da03305; function getLoanAmount(uint _cdpId, address _joinAddr) public view virtual returns(uint loanAmount) { bytes32 ilk = manager.ilks(_cdpId); (, uint rate,,,) = vat.ilks(ilk); (, uint art) = vat.urns(ilk, manager.urns(_cdpId)); uint dai = vat.dai(manager.urns(_cdpId)); uint rad = sub(mul(art, rate), dai); loanAmount = rad / RAY; loanAmount = mul(loanAmount, RAY) < rad ? loanAmount + 1 : loanAmount; } function close( uint _cdpId, address _joinAddr, uint _loanAmount, uint _collateral ) public { address owner = getOwner(manager, _cdpId); bytes32 ilk = manager.ilks(_cdpId); (uint maxColl, ) = getCdpInfo(manager, _cdpId, ilk); // repay dai debt cdp paybackDebt(_cdpId, ilk, _loanAmount, owner); maxColl = _collateral > maxColl ? maxColl : _collateral; // withdraw collateral from cdp drawMaxCollateral(_cdpId, _joinAddr, maxColl); // send back to msg.sender if (_joinAddr == ETH_JOIN_ADDRESS) { msg.sender.transfer(address(this).balance); } else { ERC20 collToken = ERC20(getCollateralAddr(_joinAddr)); collToken.transfer(msg.sender, collToken.balanceOf(address(this))); } } function open( uint _cdpId, address _joinAddr, uint _debtAmount ) public { uint collAmount = 0; if (_joinAddr == ETH_JOIN_ADDRESS) { collAmount = address(this).balance; } else { collAmount = ERC20(address(Join(_joinAddr).gem())).balanceOf(address(this)); } if (_cdpId == 0) { openAndWithdraw(collAmount, _debtAmount, address(this), _joinAddr); } else { // add collateral addCollateral(_cdpId, _joinAddr, collAmount); // draw debt drawDai(_cdpId, manager.ilks(_cdpId), _debtAmount); } // transfer to repay FL ERC20(DAI_ADDRESS).transfer(msg.sender, ERC20(DAI_ADDRESS).balanceOf(address(this))); if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } } function openAndWithdraw(uint _collAmount, uint _debtAmount, address _proxy, address _joinAddrTo) internal { bytes32 ilk = Join(_joinAddrTo).ilk(); if (_joinAddrTo == ETH_JOIN_ADDRESS) { MCDCreateProxyActions(OPEN_PROXY_ACTIONS).openLockETHAndDraw{value: address(this).balance}( address(manager), JUG_ADDRESS, ETH_JOIN_ADDRESS, DAI_JOIN_ADDRESS, ilk, _debtAmount, _proxy ); } else { ERC20(getCollateralAddr(_joinAddrTo)).approve(OPEN_PROXY_ACTIONS, uint256(-1)); MCDCreateProxyActions(OPEN_PROXY_ACTIONS).openLockGemAndDraw( address(manager), JUG_ADDRESS, _joinAddrTo, DAI_JOIN_ADDRESS, ilk, _collAmount, _debtAmount, true, _proxy ); } } function drawMaxCollateral(uint _cdpId, address _joinAddr, uint _amount) internal returns (uint) { manager.frob(_cdpId, -toPositiveInt(_amount), 0); manager.flux(_cdpId, address(this), _amount); uint joinAmount = _amount; if (Join(_joinAddr).dec() != 18) { joinAmount = _amount / (10 ** (18 - Join(_joinAddr).dec())); } Join(_joinAddr).exit(address(this), joinAmount); if (_joinAddr == ETH_JOIN_ADDRESS) { Join(_joinAddr).gem().withdraw(joinAmount); // Weth -> Eth } return joinAmount; } } contract AaveSaverProxy is GasBurner, SaverExchangeCore, AaveHelper { address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; uint public constant VARIABLE_RATE = 2; function repay(ExchangeData memory _data, uint _gasCost) public payable burnGas(20) { address lendingPoolCore = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); address payable user = payable(getUserAddress()); uint256 maxCollateral = getMaxCollateral(_data.srcAddr, address(this)); // don't swap more than maxCollateral _data.srcAmount = _data.srcAmount > maxCollateral ? maxCollateral : _data.srcAmount; // redeem collateral address aTokenCollateral = ILendingPool(lendingPoolCore).getReserveATokenAddress(_data.srcAddr); IAToken(aTokenCollateral).redeem(_data.srcAmount); uint256 destAmount = _data.srcAmount; if (_data.srcAddr != _data.destAddr) { // swap (, destAmount) = _sell(_data); destAmount -= getFee(destAmount, user, _gasCost, _data.destAddr); } else { destAmount -= getGasCost(destAmount, user, _gasCost, _data.destAddr); } // payback if (_data.destAddr == ETH_ADDR) { ILendingPool(lendingPool).repay{value: destAmount}(_data.destAddr, destAmount, payable(address(this))); } else { approveToken(_data.destAddr, lendingPoolCore); ILendingPool(lendingPool).repay(_data.destAddr, destAmount, payable(address(this))); } // first return 0x fee to msg.sender as it is the address that actually sent 0x fee sendContractBalance(ETH_ADDR, tx.origin, min(address(this).balance, msg.value)); // send all leftovers from dest addr to proxy owner sendFullContractBalance(_data.destAddr, user); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "AaveRepay", abi.encode(_data.srcAddr, _data.destAddr, _data.srcAmount, destAmount)); } function boost(ExchangeData memory _data, uint _gasCost) public payable burnGas(20) { address lendingPoolCore = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); (,,,,,,,,,bool collateralEnabled) = ILendingPool(lendingPool).getUserReserveData(_data.destAddr, address(this)); address payable user = payable(getUserAddress()); uint256 maxBorrow = getMaxBorrow(_data.srcAddr, address(this)); _data.srcAmount = _data.srcAmount > maxBorrow ? maxBorrow : _data.srcAmount; // borrow amount ILendingPool(lendingPool).borrow(_data.srcAddr, _data.srcAmount, VARIABLE_RATE, AAVE_REFERRAL_CODE); uint256 destAmount; if (_data.destAddr != _data.srcAddr) { _data.srcAmount -= getFee(_data.srcAmount, user, _gasCost, _data.srcAddr); // swap (, destAmount) = _sell(_data); } else { _data.srcAmount -= getGasCost(_data.srcAmount, user, _gasCost, _data.srcAddr); destAmount = _data.srcAmount; } if (_data.destAddr == ETH_ADDR) { ILendingPool(lendingPool).deposit{value: destAmount}(_data.destAddr, destAmount, AAVE_REFERRAL_CODE); } else { approveToken(_data.destAddr, lendingPoolCore); ILendingPool(lendingPool).deposit(_data.destAddr, destAmount, AAVE_REFERRAL_CODE); } if (!collateralEnabled) { ILendingPool(lendingPool).setUserUseReserveAsCollateral(_data.destAddr, true); } // returning to msg.sender as it is the address that actually sent 0x fee sendContractBalance(ETH_ADDR, tx.origin, min(address(this).balance, msg.value)); // send all leftovers from dest addr to proxy owner sendFullContractBalance(_data.destAddr, user); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "AaveBoost", abi.encode(_data.srcAddr, _data.destAddr, _data.srcAmount, destAmount)); } } contract CompoundLoanInfo is CompoundSafetyRatio { struct LoanData { address user; uint128 ratio; address[] collAddr; address[] borrowAddr; uint[] collAmounts; uint[] borrowAmounts; } struct TokenInfo { address cTokenAddress; address underlyingTokenAddress; uint collateralFactor; uint price; } struct TokenInfoFull { address underlyingTokenAddress; uint supplyRate; uint borrowRate; uint exchangeRate; uint marketLiquidity; uint totalSupply; uint totalBorrow; uint collateralFactor; uint price; } address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant CETH_ADDRESS = 0x4Ddc2D193948926D02f9B1fE9e1daa0718270ED5; /// @notice Calcualted the ratio of coll/debt for a compound user /// @param _user Address of the user function getRatio(address _user) public view returns (uint) { // For each asset the account is in return getSafetyRatio(_user); } /// @notice Fetches Compound prices for tokens /// @param _cTokens Arr. of cTokens for which to get the prices /// @return prices Array of prices function getPrices(address[] memory _cTokens) public view returns (uint[] memory prices) { prices = new uint[](_cTokens.length); address oracleAddr = comp.oracle(); for (uint i = 0; i < _cTokens.length; ++i) { prices[i] = CompoundOracleInterface(oracleAddr).getUnderlyingPrice(_cTokens[i]); } } /// @notice Fetches Compound collateral factors for tokens /// @param _cTokens Arr. of cTokens for which to get the coll. factors /// @return collFactors Array of coll. factors function getCollFactors(address[] memory _cTokens) public view returns (uint[] memory collFactors) { collFactors = new uint[](_cTokens.length); for (uint i = 0; i < _cTokens.length; ++i) { (, collFactors[i]) = comp.markets(_cTokens[i]); } } /// @notice Fetches all the collateral/debt address and amounts, denominated in usd /// @param _user Address of the user /// @return data LoanData information function getLoanData(address _user) public view returns (LoanData memory data) { address[] memory assets = comp.getAssetsIn(_user); address oracleAddr = comp.oracle(); data = LoanData({ user: _user, ratio: 0, collAddr: new address[](assets.length), borrowAddr: new address[](assets.length), collAmounts: new uint[](assets.length), borrowAmounts: new uint[](assets.length) }); uint collPos = 0; uint borrowPos = 0; for (uint i = 0; i < assets.length; i++) { address asset = assets[i]; (, uint cTokenBalance, uint borrowBalance, uint exchangeRateMantissa) = CTokenInterface(asset).getAccountSnapshot(_user); Exp memory oraclePrice; if (cTokenBalance != 0 || borrowBalance != 0) { oraclePrice = Exp({mantissa: CompoundOracleInterface(oracleAddr).getUnderlyingPrice(asset)}); } // Sum up collateral in Usd if (cTokenBalance != 0) { Exp memory exchangeRate = Exp({mantissa: exchangeRateMantissa}); (, Exp memory tokensToUsd) = mulExp(exchangeRate, oraclePrice); data.collAddr[collPos] = asset; (, data.collAmounts[collPos]) = mulScalarTruncate(tokensToUsd, cTokenBalance); collPos++; } // Sum up debt in Usd if (borrowBalance != 0) { data.borrowAddr[borrowPos] = asset; (, data.borrowAmounts[borrowPos]) = mulScalarTruncate(oraclePrice, borrowBalance); borrowPos++; } } data.ratio = uint128(getSafetyRatio(_user)); return data; } function getTokenBalances(address _user, address[] memory _cTokens) public view returns (uint[] memory balances, uint[] memory borrows) { balances = new uint[](_cTokens.length); borrows = new uint[](_cTokens.length); for (uint i = 0; i < _cTokens.length; i++) { address asset = _cTokens[i]; (, uint cTokenBalance, uint borrowBalance, uint exchangeRateMantissa) = CTokenInterface(asset).getAccountSnapshot(_user); Exp memory exchangeRate = Exp({mantissa: exchangeRateMantissa}); (, balances[i]) = mulScalarTruncate(exchangeRate, cTokenBalance); borrows[i] = borrowBalance; } } /// @notice Fetches all the collateral/debt address and amounts, denominated in usd /// @param _users Addresses of the user /// @return loans Array of LoanData information function getLoanDataArr(address[] memory _users) public view returns (LoanData[] memory loans) { loans = new LoanData[](_users.length); for (uint i = 0; i < _users.length; ++i) { loans[i] = getLoanData(_users[i]); } } /// @notice Calcualted the ratio of coll/debt for a compound user /// @param _users Addresses of the user /// @return ratios Array of ratios function getRatios(address[] memory _users) public view returns (uint[] memory ratios) { ratios = new uint[](_users.length); for (uint i = 0; i < _users.length; ++i) { ratios[i] = getSafetyRatio(_users[i]); } } /// @notice Information about cTokens /// @param _cTokenAddresses Array of cTokens addresses /// @return tokens Array of cTokens infomartion function getTokensInfo(address[] memory _cTokenAddresses) public returns(TokenInfo[] memory tokens) { tokens = new TokenInfo[](_cTokenAddresses.length); address oracleAddr = comp.oracle(); for (uint i = 0; i < _cTokenAddresses.length; ++i) { (, uint collFactor) = comp.markets(_cTokenAddresses[i]); tokens[i] = TokenInfo({ cTokenAddress: _cTokenAddresses[i], underlyingTokenAddress: getUnderlyingAddr(_cTokenAddresses[i]), collateralFactor: collFactor, price: CompoundOracleInterface(oracleAddr).getUnderlyingPrice(_cTokenAddresses[i]) }); } } /// @notice Information about cTokens /// @param _cTokenAddresses Array of cTokens addresses /// @return tokens Array of cTokens infomartion function getFullTokensInfo(address[] memory _cTokenAddresses) public returns(TokenInfoFull[] memory tokens) { tokens = new TokenInfoFull[](_cTokenAddresses.length); address oracleAddr = comp.oracle(); for (uint i = 0; i < _cTokenAddresses.length; ++i) { (, uint collFactor) = comp.markets(_cTokenAddresses[i]); CTokenInterface cToken = CTokenInterface(_cTokenAddresses[i]); tokens[i] = TokenInfoFull({ underlyingTokenAddress: getUnderlyingAddr(_cTokenAddresses[i]), supplyRate: cToken.supplyRatePerBlock(), borrowRate: cToken.borrowRatePerBlock(), exchangeRate: cToken.exchangeRateCurrent(), marketLiquidity: cToken.getCash(), totalSupply: cToken.totalSupply(), totalBorrow: cToken.totalBorrowsCurrent(), collateralFactor: collFactor, price: CompoundOracleInterface(oracleAddr).getUnderlyingPrice(_cTokenAddresses[i]) }); } } /// @notice Returns the underlying address of the cToken asset /// @param _cTokenAddress cToken address /// @return Token address of the cToken specified function getUnderlyingAddr(address _cTokenAddress) internal returns (address) { if (_cTokenAddress == CETH_ADDRESS) { return ETH_ADDRESS; } else { return CTokenInterface(_cTokenAddress).underlying(); } } } contract CompoundCreateReceiver is FlashLoanReceiverBase, SaverExchangeCore { ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); ShifterRegistry public constant shifterRegistry = ShifterRegistry(0x2E82103bD91053C781aaF39da17aE58ceE39d0ab); address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address payable public constant WALLET_ADDR = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; address public constant DISCOUNT_ADDR = 0x1b14E8D511c9A4395425314f849bD737BAF8208F; // solhint-disable-next-line no-empty-blocks constructor() public FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) {} struct CompCreateData { address payable proxyAddr; bytes proxyData; address cCollAddr; address cDebtAddr; } /// @notice Called by Aave when sending back the FL amount /// @param _reserve The address of the borrowed token /// @param _amount Amount of FL tokens received /// @param _fee FL Aave fee /// @param _params The params that are sent from the original FL caller contract function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { // Format the call data for DSProxy (CompCreateData memory compCreate, ExchangeData memory exchangeData) = packFunctionCall(_amount, _fee, _params); address leveragedAsset = _reserve; // If the assets are different if (compCreate.cCollAddr != compCreate.cDebtAddr) { (, uint sellAmount) = _sell(exchangeData); getFee(sellAmount, exchangeData.destAddr, compCreate.proxyAddr); leveragedAsset = exchangeData.destAddr; } // Send amount to DSProxy sendToProxy(compCreate.proxyAddr, leveragedAsset); address compOpenProxy = shifterRegistry.getAddr("COMP_SHIFTER"); // Execute the DSProxy call DSProxyInterface(compCreate.proxyAddr).execute(compOpenProxy, compCreate.proxyData); // Repay the loan with the money DSProxy sent back transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { // solhint-disable-next-line avoid-tx-origin tx.origin.transfer(address(this).balance); } } /// @notice Formats function data call so we can call it through DSProxy /// @param _amount Amount of FL /// @param _fee Fee of the FL /// @param _params Saver proxy params function packFunctionCall(uint _amount, uint _fee, bytes memory _params) internal pure returns (CompCreateData memory compCreate, ExchangeData memory exchangeData) { ( uint[4] memory numData, // srcAmount, destAmount, minPrice, price0x address[6] memory cAddresses, // cCollAddr, cDebtAddr, srcAddr, destAddr, exchangeAddr, wrapper bytes memory callData, address proxy ) = abi.decode(_params, (uint256[4],address[6],bytes,address)); bytes memory proxyData = abi.encodeWithSignature( "open(address,address,uint256)", cAddresses[0], cAddresses[1], (_amount + _fee)); exchangeData = SaverExchangeCore.ExchangeData({ srcAddr: cAddresses[2], destAddr: cAddresses[3], srcAmount: numData[0], destAmount: numData[1], minPrice: numData[2], wrapper: cAddresses[5], exchangeAddr: cAddresses[4], callData: callData, price0x: numData[3] }); compCreate = CompCreateData({ proxyAddr: payable(proxy), proxyData: proxyData, cCollAddr: cAddresses[0], cDebtAddr: cAddresses[1] }); return (compCreate, exchangeData); } /// @notice Send the FL funds received to DSProxy /// @param _proxy DSProxy address /// @param _reserve Token address function sendToProxy(address payable _proxy, address _reserve) internal { if (_reserve != ETH_ADDRESS) { ERC20(_reserve).safeTransfer(_proxy, ERC20(_reserve).balanceOf(address(this))); } else { _proxy.transfer(address(this).balance); } } function getFee(uint _amount, address _tokenAddr, address _proxy) internal returns (uint feeAmount) { uint fee = 400; DSProxy proxy = DSProxy(payable(_proxy)); address user = proxy.owner(); if (Discount(DISCOUNT_ADDR).isCustomFeeSet(user)) { fee = Discount(DISCOUNT_ADDR).getCustomServiceFee(user); } feeAmount = (fee == 0) ? 0 : (_amount / fee); // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } if (_tokenAddr == ETH_ADDRESS) { WALLET_ADDR.transfer(feeAmount); } else { ERC20(_tokenAddr).safeTransfer(WALLET_ADDR, feeAmount); } } // solhint-disable-next-line no-empty-blocks receive() external override(FlashLoanReceiverBase, SaverExchangeCore) payable {} } contract CompoundSaverFlashLoan is FlashLoanReceiverBase, SaverExchangeCore { ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); address payable public COMPOUND_SAVER_FLASH_PROXY = 0xcEAb38B5C88F33Dabe4D31BDD384E08215526632; address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public owner; using SafeERC20 for ERC20; constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public { owner = msg.sender; } /// @notice Called by Aave when sending back the FL amount /// @param _reserve The address of the borrowed token /// @param _amount Amount of FL tokens received /// @param _fee FL Aave fee /// @param _params The params that are sent from the original FL caller contract function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { // Format the call data for DSProxy (bytes memory proxyData, address payable proxyAddr) = packFunctionCall(_amount, _fee, _params); // Send Flash loan amount to DSProxy sendLoanToProxy(proxyAddr, _reserve, _amount); // Execute the DSProxy call DSProxyInterface(proxyAddr).execute(COMPOUND_SAVER_FLASH_PROXY, proxyData); // Repay the loan with the money DSProxy sent back transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } } /// @notice Formats function data call so we can call it through DSProxy /// @param _amount Amount of FL /// @param _fee Fee of the FL /// @param _params Saver proxy params /// @return proxyData Formated function call data function packFunctionCall(uint _amount, uint _fee, bytes memory _params) internal pure returns (bytes memory proxyData, address payable) { ( bytes memory exDataBytes, address[2] memory cAddresses, // cCollAddress, cBorrowAddress uint256 gasCost, bool isRepay, address payable proxyAddr ) = abi.decode(_params, (bytes,address[2],uint256,bool,address)); ExchangeData memory _exData = unpackExchangeData(exDataBytes); uint[2] memory flashLoanData = [_amount, _fee]; if (isRepay) { proxyData = abi.encodeWithSignature("flashRepay((address,address,uint256,uint256,uint256,address,address,bytes,uint256),address[2],uint256,uint256[2])", _exData, cAddresses, gasCost, flashLoanData); } else { proxyData = abi.encodeWithSignature("flashBoost((address,address,uint256,uint256,uint256,address,address,bytes,uint256),address[2],uint256,uint256[2])", _exData, cAddresses, gasCost, flashLoanData); } return (proxyData, proxyAddr); } /// @notice Send the FL funds received to DSProxy /// @param _proxy DSProxy address /// @param _reserve Token address /// @param _amount Amount of tokens function sendLoanToProxy(address payable _proxy, address _reserve, uint _amount) internal { if (_reserve != ETH_ADDRESS) { ERC20(_reserve).safeTransfer(_proxy, _amount); } _proxy.transfer(address(this).balance); } receive() external override(SaverExchangeCore, FlashLoanReceiverBase) payable {} } contract CompoundSaverFlashProxy is SaverExchangeCore, CompoundSaverHelper { address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; using SafeERC20 for ERC20; /// @notice Repays the position and sends tokens back for FL /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress] /// @param _gasCost Gas cost for transaction /// @param _flashLoanData Data about FL [amount, fee] function flashRepay( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost, uint[2] memory _flashLoanData // amount, fee ) public payable { enterMarket(_cAddresses[0], _cAddresses[1]); address payable user = payable(getUserAddress()); uint flashBorrowed = _flashLoanData[0] + _flashLoanData[1]; uint maxColl = getMaxCollateral(_cAddresses[0], address(this)); // draw max coll require(CTokenInterface(_cAddresses[0]).redeemUnderlying(maxColl) == 0); address collToken = getUnderlyingAddr(_cAddresses[0]); address borrowToken = getUnderlyingAddr(_cAddresses[1]); uint swapAmount = 0; if (collToken != borrowToken) { // swap max coll + loanAmount _exData.srcAmount = maxColl + _flashLoanData[0]; (,swapAmount) = _sell(_exData); // get fee swapAmount -= getFee(swapAmount, user, _gasCost, _cAddresses[1]); } else { swapAmount = (maxColl + _flashLoanData[0]); swapAmount -= getGasCost(swapAmount, _gasCost, _cAddresses[1]); } // payback debt paybackDebt(swapAmount, _cAddresses[1], borrowToken, user); // draw collateral for loanAmount + loanFee require(CTokenInterface(_cAddresses[0]).redeemUnderlying(flashBorrowed) == 0); // repay flash loan returnFlashLoan(collToken, flashBorrowed); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "CompoundRepay", abi.encode(_exData.srcAmount, swapAmount, collToken, borrowToken)); } /// @notice Boosts the position and sends tokens back for FL /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress] /// @param _gasCost Gas cost for specific transaction /// @param _flashLoanData Data about FL [amount, fee] function flashBoost( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost, uint[2] memory _flashLoanData // amount, fee ) public payable { enterMarket(_cAddresses[0], _cAddresses[1]); address payable user = payable(getUserAddress()); uint flashBorrowed = _flashLoanData[0] + _flashLoanData[1]; // borrow max amount uint borrowAmount = getMaxBorrow(_cAddresses[1], address(this)); require(CTokenInterface(_cAddresses[1]).borrow(borrowAmount) == 0); address collToken = getUnderlyingAddr(_cAddresses[0]); address borrowToken = getUnderlyingAddr(_cAddresses[1]); uint swapAmount = 0; if (collToken != borrowToken) { // get dfs fee borrowAmount -= getFee((borrowAmount + _flashLoanData[0]), user, _gasCost, _cAddresses[1]); _exData.srcAmount = (borrowAmount + _flashLoanData[0]); (,swapAmount) = _sell(_exData); } else { swapAmount = (borrowAmount + _flashLoanData[0]); swapAmount -= getGasCost(swapAmount, _gasCost, _cAddresses[1]); } // deposit swaped collateral depositCollateral(collToken, _cAddresses[0], swapAmount); // borrow token to repay flash loan require(CTokenInterface(_cAddresses[1]).borrow(flashBorrowed) == 0); // repay flash loan returnFlashLoan(borrowToken, flashBorrowed); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "CompoundBoost", abi.encode(_exData.srcAmount, swapAmount, collToken, borrowToken)); } /// @notice Helper method to deposit tokens in Compound /// @param _collToken Token address of the collateral /// @param _cCollToken CToken address of the collateral /// @param _depositAmount Amount to deposit function depositCollateral(address _collToken, address _cCollToken, uint _depositAmount) internal { approveCToken(_collToken, _cCollToken); if (_collToken != ETH_ADDRESS) { require(CTokenInterface(_cCollToken).mint(_depositAmount) == 0); } else { CEtherInterface(_cCollToken).mint{value: _depositAmount}(); // reverts on fail } } /// @notice Returns the tokens/ether to the msg.sender which is the FL contract /// @param _tokenAddr Address of token which we return /// @param _amount Amount to return function returnFlashLoan(address _tokenAddr, uint _amount) internal { if (_tokenAddr != ETH_ADDRESS) { ERC20(_tokenAddr).safeTransfer(msg.sender, _amount); } msg.sender.transfer(address(this).balance); } } contract CompoundSaverProxy is CompoundSaverHelper, SaverExchangeCore { DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); /// @notice Withdraws collateral, converts to borrowed token and repays debt /// @dev Called through the DSProxy /// @param _exData Exchange data /// @param _cAddresses Coll/Debt addresses [cCollAddress, cBorrowAddress] /// @param _gasCost Gas cost for specific transaction function repay( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost ) public payable { enterMarket(_cAddresses[0], _cAddresses[1]); address payable user = payable(getUserAddress()); uint maxColl = getMaxCollateral(_cAddresses[0], address(this)); uint collAmount = (_exData.srcAmount > maxColl) ? maxColl : _exData.srcAmount; require(CTokenInterface(_cAddresses[0]).redeemUnderlying(collAmount) == 0); address collToken = getUnderlyingAddr(_cAddresses[0]); address borrowToken = getUnderlyingAddr(_cAddresses[1]); uint swapAmount = 0; if (collToken != borrowToken) { (, swapAmount) = _sell(_exData); swapAmount -= getFee(swapAmount, user, _gasCost, _cAddresses[1]); } else { swapAmount = collAmount; swapAmount -= getGasCost(swapAmount, _gasCost, _cAddresses[1]); } paybackDebt(swapAmount, _cAddresses[1], borrowToken, user); // handle 0x fee tx.origin.transfer(address(this).balance); // log amount, collToken, borrowToken logger.Log(address(this), msg.sender, "CompoundRepay", abi.encode(_exData.srcAmount, swapAmount, collToken, borrowToken)); } /// @notice Borrows token, converts to collateral, and adds to position /// @dev Called through the DSProxy /// @param _exData Exchange data /// @param _cAddresses Coll/Debt addresses [cCollAddress, cBorrowAddress] /// @param _gasCost Gas cost for specific transaction function boost( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost ) public payable { enterMarket(_cAddresses[0], _cAddresses[1]); address payable user = payable(getUserAddress()); uint maxBorrow = getMaxBorrow(_cAddresses[1], address(this)); uint borrowAmount = (_exData.srcAmount > maxBorrow) ? maxBorrow : _exData.srcAmount; require(CTokenInterface(_cAddresses[1]).borrow(borrowAmount) == 0); address collToken = getUnderlyingAddr(_cAddresses[0]); address borrowToken = getUnderlyingAddr(_cAddresses[1]); uint swapAmount = 0; if (collToken != borrowToken) { borrowAmount -= getFee(borrowAmount, user, _gasCost, _cAddresses[1]); _exData.srcAmount = borrowAmount; (,swapAmount) = _sell(_exData); } else { swapAmount = borrowAmount; swapAmount -= getGasCost(swapAmount, _gasCost, _cAddresses[1]); } approveCToken(collToken, _cAddresses[0]); if (collToken != ETH_ADDRESS) { require(CTokenInterface(_cAddresses[0]).mint(swapAmount) == 0); } else { CEtherInterface(_cAddresses[0]).mint{value: swapAmount}(); // reverts on fail } // handle 0x fee tx.origin.transfer(address(this).balance); // log amount, collToken, borrowToken logger.Log(address(this), msg.sender, "CompoundBoost", abi.encode(_exData.srcAmount, swapAmount, collToken, borrowToken)); } } contract CreamSaverFlashLoan is FlashLoanReceiverBase, SaverExchangeCore { ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); address payable public COMPOUND_SAVER_FLASH_PROXY = 0xcEAb38B5C88F33Dabe4D31BDD384E08215526632; address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public owner; using SafeERC20 for ERC20; constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public { owner = msg.sender; } /// @notice Called by Aave when sending back the FL amount /// @param _reserve The address of the borrowed token /// @param _amount Amount of FL tokens received /// @param _fee FL Aave fee /// @param _params The params that are sent from the original FL caller contract function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { // Format the call data for DSProxy (bytes memory proxyData, address payable proxyAddr) = packFunctionCall(_amount, _fee, _params); // Send Flash loan amount to DSProxy sendLoanToProxy(proxyAddr, _reserve, _amount); // Execute the DSProxy call DSProxyInterface(proxyAddr).execute(COMPOUND_SAVER_FLASH_PROXY, proxyData); // Repay the loan with the money DSProxy sent back transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } } /// @notice Formats function data call so we can call it through DSProxy /// @param _amount Amount of FL /// @param _fee Fee of the FL /// @param _params Saver proxy params /// @return proxyData Formated function call data function packFunctionCall(uint _amount, uint _fee, bytes memory _params) internal pure returns (bytes memory proxyData, address payable) { ( bytes memory exDataBytes, address[2] memory cAddresses, // cCollAddress, cBorrowAddress uint256 gasCost, bool isRepay, address payable proxyAddr ) = abi.decode(_params, (bytes,address[2],uint256,bool,address)); ExchangeData memory _exData = unpackExchangeData(exDataBytes); uint[2] memory flashLoanData = [_amount, _fee]; if (isRepay) { proxyData = abi.encodeWithSignature("flashRepay((address,address,uint256,uint256,uint256,address,address,bytes,uint256),address[2],uint256,uint256[2])", _exData, cAddresses, gasCost, flashLoanData); } else { proxyData = abi.encodeWithSignature("flashBoost((address,address,uint256,uint256,uint256,address,address,bytes,uint256),address[2],uint256,uint256[2])", _exData, cAddresses, gasCost, flashLoanData); } return (proxyData, proxyAddr); } /// @notice Send the FL funds received to DSProxy /// @param _proxy DSProxy address /// @param _reserve Token address /// @param _amount Amount of tokens function sendLoanToProxy(address payable _proxy, address _reserve, uint _amount) internal { if (_reserve != ETH_ADDRESS) { ERC20(_reserve).safeTransfer(_proxy, _amount); } _proxy.transfer(address(this).balance); } receive() external override(SaverExchangeCore, FlashLoanReceiverBase) payable {} } contract CreamSaverFlashProxy is SaverExchangeCore, CreamSaverHelper { address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; using SafeERC20 for ERC20; /// @notice Repays the position and sends tokens back for FL /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress] /// @param _gasCost Gas cost for transaction /// @param _flashLoanData Data about FL [amount, fee] function flashRepay( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost, uint[2] memory _flashLoanData // amount, fee ) public payable { enterMarket(_cAddresses[0], _cAddresses[1]); address payable user = payable(getUserAddress()); uint flashBorrowed = _flashLoanData[0] + _flashLoanData[1]; uint maxColl = getMaxCollateral(_cAddresses[0], address(this)); // draw max coll require(CTokenInterface(_cAddresses[0]).redeemUnderlying(maxColl) == 0); address collToken = getUnderlyingAddr(_cAddresses[0]); address borrowToken = getUnderlyingAddr(_cAddresses[1]); uint swapAmount = 0; if (collToken != borrowToken) { // swap max coll + loanAmount _exData.srcAmount = maxColl + _flashLoanData[0]; (,swapAmount) = _sell(_exData); // get fee swapAmount -= getFee(swapAmount, user, _gasCost, _cAddresses[1]); } else { swapAmount = (maxColl + _flashLoanData[0]); swapAmount -= getGasCost(swapAmount, _gasCost, _cAddresses[1]); } // payback debt paybackDebt(swapAmount, _cAddresses[1], borrowToken, user); // draw collateral for loanAmount + loanFee require(CTokenInterface(_cAddresses[0]).redeemUnderlying(flashBorrowed) == 0); // repay flash loan returnFlashLoan(collToken, flashBorrowed); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "CreamRepay", abi.encode(_exData.srcAmount, swapAmount, collToken, borrowToken)); } /// @notice Boosts the position and sends tokens back for FL /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress] /// @param _gasCost Gas cost for specific transaction /// @param _flashLoanData Data about FL [amount, fee] function flashBoost( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost, uint[2] memory _flashLoanData // amount, fee ) public payable { enterMarket(_cAddresses[0], _cAddresses[1]); address payable user = payable(getUserAddress()); uint flashBorrowed = _flashLoanData[0] + _flashLoanData[1]; // borrow max amount uint borrowAmount = getMaxBorrow(_cAddresses[1], address(this)); require(CTokenInterface(_cAddresses[1]).borrow(borrowAmount) == 0); address collToken = getUnderlyingAddr(_cAddresses[0]); address borrowToken = getUnderlyingAddr(_cAddresses[1]); uint swapAmount = 0; if (collToken != borrowToken) { // get dfs fee borrowAmount -= getFee((borrowAmount + _flashLoanData[0]), user, _gasCost, _cAddresses[1]); _exData.srcAmount = (borrowAmount + _flashLoanData[0]); (,swapAmount) = _sell(_exData); } else { swapAmount = (borrowAmount + _flashLoanData[0]); swapAmount -= getGasCost(swapAmount, _gasCost, _cAddresses[1]); } // deposit swaped collateral depositCollateral(collToken, _cAddresses[0], swapAmount); // borrow token to repay flash loan require(CTokenInterface(_cAddresses[1]).borrow(flashBorrowed) == 0); // repay flash loan returnFlashLoan(borrowToken, flashBorrowed); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "CreamBoost", abi.encode(_exData.srcAmount, swapAmount, collToken, borrowToken)); } /// @notice Helper method to deposit tokens in Compound /// @param _collToken Token address of the collateral /// @param _cCollToken CToken address of the collateral /// @param _depositAmount Amount to deposit function depositCollateral(address _collToken, address _cCollToken, uint _depositAmount) internal { approveCToken(_collToken, _cCollToken); if (_collToken != ETH_ADDRESS) { require(CTokenInterface(_cCollToken).mint(_depositAmount) == 0); } else { CEtherInterface(_cCollToken).mint{value: _depositAmount}(); // reverts on fail } } /// @notice Returns the tokens/ether to the msg.sender which is the FL contract /// @param _tokenAddr Address of token which we return /// @param _amount Amount to return function returnFlashLoan(address _tokenAddr, uint _amount) internal { if (_tokenAddr != ETH_ADDRESS) { ERC20(_tokenAddr).safeTransfer(msg.sender, _amount); } msg.sender.transfer(address(this).balance); } } contract CreamSaverProxy is CreamSaverHelper, SaverExchangeCore { DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); /// @notice Withdraws collateral, converts to borrowed token and repays debt /// @dev Called through the DSProxy /// @param _exData Exchange data /// @param _cAddresses Coll/Debt addresses [cCollAddress, cBorrowAddress] /// @param _gasCost Gas cost for specific transaction function repay( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost ) public payable { enterMarket(_cAddresses[0], _cAddresses[1]); address payable user = payable(getUserAddress()); uint maxColl = getMaxCollateral(_cAddresses[0], address(this)); uint collAmount = (_exData.srcAmount > maxColl) ? maxColl : _exData.srcAmount; require(CTokenInterface(_cAddresses[0]).redeemUnderlying(collAmount) == 0); address collToken = getUnderlyingAddr(_cAddresses[0]); address borrowToken = getUnderlyingAddr(_cAddresses[1]); uint swapAmount = 0; if (collToken != borrowToken) { (, swapAmount) = _sell(_exData); swapAmount -= getFee(swapAmount, user, _gasCost, _cAddresses[1]); } else { swapAmount = collAmount; swapAmount -= getGasCost(swapAmount, _gasCost, _cAddresses[1]); } paybackDebt(swapAmount, _cAddresses[1], borrowToken, user); // handle 0x fee tx.origin.transfer(address(this).balance); // log amount, collToken, borrowToken logger.Log(address(this), msg.sender, "CreamRepay", abi.encode(_exData.srcAmount, swapAmount, collToken, borrowToken)); } /// @notice Borrows token, converts to collateral, and adds to position /// @dev Called through the DSProxy /// @param _exData Exchange data /// @param _cAddresses Coll/Debt addresses [cCollAddress, cBorrowAddress] /// @param _gasCost Gas cost for specific transaction function boost( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost ) public payable { enterMarket(_cAddresses[0], _cAddresses[1]); address payable user = payable(getUserAddress()); uint maxBorrow = getMaxBorrow(_cAddresses[1], address(this)); uint borrowAmount = (_exData.srcAmount > maxBorrow) ? maxBorrow : _exData.srcAmount; require(CTokenInterface(_cAddresses[1]).borrow(borrowAmount) == 0); address collToken = getUnderlyingAddr(_cAddresses[0]); address borrowToken = getUnderlyingAddr(_cAddresses[1]); uint swapAmount = 0; if (collToken != borrowToken) { borrowAmount -= getFee(borrowAmount, user, _gasCost, _cAddresses[1]); _exData.srcAmount = borrowAmount; (,swapAmount) = _sell(_exData); } else { swapAmount = borrowAmount; swapAmount -= getGasCost(swapAmount, _gasCost, _cAddresses[1]); } approveCToken(collToken, _cAddresses[0]); if (collToken != ETH_ADDRESS) { require(CTokenInterface(_cAddresses[0]).mint(swapAmount) == 0); } else { CEtherInterface(_cAddresses[0]).mint{value: swapAmount}(); // reverts on fail } // handle 0x fee tx.origin.transfer(address(this).balance); // log amount, collToken, borrowToken logger.Log(address(this), msg.sender, "CreamBoost", abi.encode(_exData.srcAmount, swapAmount, collToken, borrowToken)); } } contract SaverExchange is SaverExchangeCore, AdminAuth, GasBurner { using SafeERC20 for ERC20; uint256 public constant SERVICE_FEE = 800; // 0.125% Fee // solhint-disable-next-line const-name-snakecase DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); uint public burnAmount = 10; /// @notice Takes a src amount of tokens and converts it into the dest token /// @dev Takes fee from the _srcAmount before the exchange /// @param exData [srcAddr, destAddr, srcAmount, destAmount, minPrice, exchangeType, exchangeAddr, callData, price0x] /// @param _user User address who called the exchange function sell(ExchangeData memory exData, address payable _user) public payable burnGas(burnAmount) { // take fee uint dfsFee = getFee(exData.srcAmount, exData.srcAddr); exData.srcAmount = sub(exData.srcAmount, dfsFee); // Perform the exchange (address wrapper, uint destAmount) = _sell(exData); // send back any leftover ether or tokens sendLeftover(exData.srcAddr, exData.destAddr, _user); // log the event logger.Log(address(this), msg.sender, "ExchangeSell", abi.encode(wrapper, exData.srcAddr, exData.destAddr, exData.srcAmount, destAmount)); } /// @notice Takes a dest amount of tokens and converts it from the src token /// @dev Send always more than needed for the swap, extra will be returned /// @param exData [srcAddr, destAddr, srcAmount, destAmount, minPrice, exchangeType, exchangeAddr, callData, price0x] /// @param _user User address who called the exchange function buy(ExchangeData memory exData, address payable _user) public payable burnGas(burnAmount){ uint dfsFee = getFee(exData.srcAmount, exData.srcAddr); exData.srcAmount = sub(exData.srcAmount, dfsFee); // Perform the exchange (address wrapper, uint srcAmount) = _buy(exData); // send back any leftover ether or tokens sendLeftover(exData.srcAddr, exData.destAddr, _user); // log the event logger.Log(address(this), msg.sender, "ExchangeBuy", abi.encode(wrapper, exData.srcAddr, exData.destAddr, srcAmount, exData.destAmount)); } /// @notice Takes a feePercentage and sends it to wallet /// @param _amount Dai amount of the whole trade /// @param _token Address of the token /// @return feeAmount Amount in Dai owner earned on the fee function getFee(uint256 _amount, address _token) internal returns (uint256 feeAmount) { uint256 fee = SERVICE_FEE; if (Discount(DISCOUNT_ADDRESS).isCustomFeeSet(msg.sender)) { fee = Discount(DISCOUNT_ADDRESS).getCustomServiceFee(msg.sender); } if (fee == 0) { feeAmount = 0; } else { feeAmount = _amount / fee; if (_token == KYBER_ETH_ADDRESS) { WALLET_ID.transfer(feeAmount); } else { ERC20(_token).safeTransfer(WALLET_ID, feeAmount); } } } /// @notice Changes the amount of gas token we burn for each call /// @dev Only callable by the owner /// @param _newBurnAmount New amount of gas tokens to be burned function changeBurnAmount(uint _newBurnAmount) public { require(owner == msg.sender); burnAmount = _newBurnAmount; } } contract MCDSaverFlashLoan is MCDSaverProxy, AdminAuth, FlashLoanReceiverBase { ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public {} struct SaverData { uint cdpId; uint gasCost; uint loanAmount; uint fee; address joinAddr; } function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { //check the contract has the specified balance require(_amount <= getBalanceInternal(address(this), _reserve), "Invalid balance for the contract"); ( bytes memory exDataBytes, uint cdpId, uint gasCost, address joinAddr, bool isRepay ) = abi.decode(_params, (bytes,uint256,uint256,address,bool)); ExchangeData memory exchangeData = unpackExchangeData(exDataBytes); SaverData memory saverData = SaverData({ cdpId: cdpId, gasCost: gasCost, loanAmount: _amount, fee: _fee, joinAddr: joinAddr }); if (isRepay) { repayWithLoan(exchangeData, saverData); } else { boostWithLoan(exchangeData, saverData); } transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } } function boostWithLoan( ExchangeData memory _exchangeData, SaverData memory _saverData ) internal { address user = getOwner(manager, _saverData.cdpId); // Draw users Dai uint maxDebt = getMaxDebt(_saverData.cdpId, manager.ilks(_saverData.cdpId)); uint daiDrawn = drawDai(_saverData.cdpId, manager.ilks(_saverData.cdpId), maxDebt); // Calc. fees uint dsfFee = getFee((daiDrawn + _saverData.loanAmount), _saverData.gasCost, user); uint afterFee = (daiDrawn + _saverData.loanAmount) - dsfFee; // Swap _exchangeData.srcAmount = afterFee; (, uint swapedAmount) = _sell(_exchangeData); // Return collateral addCollateral(_saverData.cdpId, _saverData.joinAddr, swapedAmount); // Draw Dai to repay the flash loan drawDai(_saverData.cdpId, manager.ilks(_saverData.cdpId), (_saverData.loanAmount + _saverData.fee)); logger.Log(address(this), msg.sender, "MCDFlashBoost", abi.encode(_saverData.cdpId, owner, _exchangeData.srcAmount, swapedAmount)); } function repayWithLoan( ExchangeData memory _exchangeData, SaverData memory _saverData ) internal { address user = getOwner(manager, _saverData.cdpId); bytes32 ilk = manager.ilks(_saverData.cdpId); // Draw collateral uint maxColl = getMaxCollateral(_saverData.cdpId, ilk, _saverData.joinAddr); uint collDrawn = drawCollateral(_saverData.cdpId, _saverData.joinAddr, maxColl); // Swap _exchangeData.srcAmount = (_saverData.loanAmount + collDrawn); (, uint swapedAmount) = _sell(_exchangeData); uint paybackAmount = (swapedAmount - getFee(swapedAmount, _saverData.gasCost, user)); paybackAmount = limitLoanAmount(_saverData.cdpId, ilk, paybackAmount, user); // Payback the debt paybackDebt(_saverData.cdpId, ilk, paybackAmount, user); // Draw collateral to repay the flash loan drawCollateral(_saverData.cdpId, _saverData.joinAddr, (_saverData.loanAmount + _saverData.fee)); logger.Log(address(this), msg.sender, "MCDFlashRepay", abi.encode(_saverData.cdpId, owner, _exchangeData.srcAmount, swapedAmount)); } /// @notice Handles that the amount is not bigger than cdp debt and not dust function limitLoanAmount(uint _cdpId, bytes32 _ilk, uint _paybackAmount, address _owner) internal returns (uint256) { uint debt = getAllDebt(address(vat), manager.urns(_cdpId), manager.urns(_cdpId), _ilk); if (_paybackAmount > debt) { ERC20(DAI_ADDRESS).transfer(_owner, (_paybackAmount - debt)); return debt; } uint debtLeft = debt - _paybackAmount; (,,,, uint dust) = vat.ilks(_ilk); dust = dust / 10**27; // Less than dust value if (debtLeft < dust) { uint amountOverDust = (dust - debtLeft); ERC20(DAI_ADDRESS).transfer(_owner, amountOverDust); return (_paybackAmount - amountOverDust); } return _paybackAmount; } receive() external override(FlashLoanReceiverBase, SaverExchangeCore) payable {} } contract CompoundFlashLoanTaker is CompoundSaverProxy, ProxyPermission, GasBurner { ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); address payable public constant COMPOUND_SAVER_FLASH_LOAN = 0xCeB190A35D9D4804b9CE8d0CF79239f6949BfCcB; address public constant AAVE_POOL_CORE = 0x3dfd23A6c5E8BbcFc9581d2E864a68feb6a076d3; /// @notice Repays the position with it's own fund or with FL if needed /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress, exchangeAddress] /// @param _gasCost Gas cost for specific transaction function repayWithLoan( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost ) public payable burnGas(25) { uint maxColl = getMaxCollateral(_cAddresses[0], address(this)); uint availableLiquidity = getAvailableLiquidity(_exData.srcAddr); if (_exData.srcAmount <= maxColl || availableLiquidity == 0) { repay(_exData, _cAddresses, _gasCost); } else { // 0x fee COMPOUND_SAVER_FLASH_LOAN.transfer(msg.value); uint loanAmount = (_exData.srcAmount - maxColl); if (loanAmount > availableLiquidity) loanAmount = availableLiquidity; bytes memory encoded = packExchangeData(_exData); bytes memory paramsData = abi.encode(encoded, _cAddresses, _gasCost, true, address(this)); givePermission(COMPOUND_SAVER_FLASH_LOAN); lendingPool.flashLoan(COMPOUND_SAVER_FLASH_LOAN, getUnderlyingAddr(_cAddresses[0]), loanAmount, paramsData); removePermission(COMPOUND_SAVER_FLASH_LOAN); logger.Log(address(this), msg.sender, "CompoundFlashRepay", abi.encode(loanAmount, _exData.srcAmount, _cAddresses[0])); } } /// @notice Boosts the position with it's own fund or with FL if needed /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress, exchangeAddress] /// @param _gasCost Gas cost for specific transaction function boostWithLoan( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost ) public payable burnGas(20) { uint maxBorrow = getMaxBorrow(_cAddresses[1], address(this)); uint availableLiquidity = getAvailableLiquidity(_exData.srcAddr); if (_exData.srcAmount <= maxBorrow || availableLiquidity == 0) { boost(_exData, _cAddresses, _gasCost); } else { // 0x fee COMPOUND_SAVER_FLASH_LOAN.transfer(msg.value); uint loanAmount = (_exData.srcAmount - maxBorrow); if (loanAmount > availableLiquidity) loanAmount = availableLiquidity; bytes memory paramsData = abi.encode(packExchangeData(_exData), _cAddresses, _gasCost, false, address(this)); givePermission(COMPOUND_SAVER_FLASH_LOAN); lendingPool.flashLoan(COMPOUND_SAVER_FLASH_LOAN, getUnderlyingAddr(_cAddresses[1]), loanAmount, paramsData); removePermission(COMPOUND_SAVER_FLASH_LOAN); logger.Log(address(this), msg.sender, "CompoundFlashBoost", abi.encode(loanAmount, _exData.srcAmount, _cAddresses[1])); } } function getAvailableLiquidity(address _tokenAddr) internal view returns (uint liquidity) { if (_tokenAddr == KYBER_ETH_ADDRESS) { liquidity = AAVE_POOL_CORE.balance; } else { liquidity = ERC20(_tokenAddr).balanceOf(AAVE_POOL_CORE); } } } contract CreamFlashLoanTaker is CreamSaverProxy, ProxyPermission, GasBurner { ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); address payable public constant COMPOUND_SAVER_FLASH_LOAN = 0xCeB190A35D9D4804b9CE8d0CF79239f6949BfCcB; /// @notice Repays the position with it's own fund or with FL if needed /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress, exchangeAddress] /// @param _gasCost Gas cost for specific transaction function repayWithLoan( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost ) public payable burnGas(25) { uint maxColl = getMaxCollateral(_cAddresses[0], address(this)); if (_exData.srcAmount <= maxColl) { repay(_exData, _cAddresses, _gasCost); } else { // 0x fee COMPOUND_SAVER_FLASH_LOAN.transfer(msg.value); uint loanAmount = (_exData.srcAmount - maxColl); bytes memory encoded = packExchangeData(_exData); bytes memory paramsData = abi.encode(encoded, _cAddresses, _gasCost, true, address(this)); givePermission(COMPOUND_SAVER_FLASH_LOAN); lendingPool.flashLoan(COMPOUND_SAVER_FLASH_LOAN, getUnderlyingAddr(_cAddresses[0]), loanAmount, paramsData); removePermission(COMPOUND_SAVER_FLASH_LOAN); logger.Log(address(this), msg.sender, "CreamFlashRepay", abi.encode(loanAmount, _exData.srcAmount, _cAddresses[0])); } } /// @notice Boosts the position with it's own fund or with FL if needed /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress, exchangeAddress] /// @param _gasCost Gas cost for specific transaction function boostWithLoan( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost ) public payable burnGas(20) { uint maxBorrow = getMaxBorrow(_cAddresses[1], address(this)); if (_exData.srcAmount <= maxBorrow) { boost(_exData, _cAddresses, _gasCost); } else { // 0x fee COMPOUND_SAVER_FLASH_LOAN.transfer(msg.value); uint loanAmount = (_exData.srcAmount - maxBorrow); bytes memory paramsData = abi.encode(packExchangeData(_exData), _cAddresses, _gasCost, false, address(this)); givePermission(COMPOUND_SAVER_FLASH_LOAN); lendingPool.flashLoan(COMPOUND_SAVER_FLASH_LOAN, getUnderlyingAddr(_cAddresses[1]), loanAmount, paramsData); removePermission(COMPOUND_SAVER_FLASH_LOAN); logger.Log(address(this), msg.sender, "CreamFlashBoost", abi.encode(loanAmount, _exData.srcAmount, _cAddresses[1])); } } }

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{"success": true, "error": null, "results": {"detectors": [{"check": "tx-origin", "impact": "Medium", "confidence": "Medium"}, {"check": "name-reused", "impact": "High", "confidence": "High"}, {"check": "erc20-interface", "impact": "Medium", "confidence": "High"}, {"check": "arbitrary-send", "impact": "High", "confidence": "Medium"}, {"check": "unchecked-lowlevel", "impact": "Medium", "confidence": "Medium"}, {"check": "incorrect-equality", "impact": "Medium", "confidence": "High"}, {"check": "uninitialized-local", "impact": "Medium", "confidence": "Medium"}, {"check": "unchecked-transfer", "impact": "High", "confidence": "Medium"}, {"check": "unused-return", "impact": "Medium", "confidence": "Medium"}, {"check": "locked-ether", "impact": "Medium", "confidence": "High"}]}}

0x84c722e6f1363e8d5c6db3ea600bef9a006da824

pragma solidity 0.5.9; contract ERC20Interface { event Transfer( address indexed _from, address indexed _to, uint _value); event Approval( address indexed _owner, address indexed _spender, uint _value); function totalSupply() view public returns (uint _supply); function balanceOf( address _who ) public view returns (uint _value); function transfer( address _to, uint _value) public returns (bool _success); function approve( address _spender, uint _value ) public returns (bool _success); function allowance( address _owner, address _spender ) public view returns (uint _allowance); function transferFrom( address _from, address _to, uint _value) public returns (bool _success); } contract OwnerHelper { address public owner; address public manager; event ChangeOwner(address indexed _from, address indexed _to); event ChangeManager(address indexed _from, address indexed _to); modifier onlyOwner { require(msg.sender == owner); _; } modifier onlyManager { require(msg.sender == manager); _; } constructor() public { owner = msg.sender; } function transferOwnership(address _to) onlyOwner public { require(_to != owner); require(_to != manager); require(_to != address(0x0)); address from = owner; owner = _to; emit ChangeOwner(from, _to); } function transferManager(address _to) onlyOwner public { require(_to != owner); require(_to != manager); require(_to != address(0x0)); address from = manager; manager = _to; emit ChangeManager(from, _to); } } library SafeMath { function mul(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a * b; assert(a == 0 || c / a == b); return c; } function div(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a / b; return c; } function sub(uint256 a, uint256 b) internal pure returns (uint256) { assert(b <= a); return a - b; } function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; assert(c >= a); return c; } } contract MisBloc is ERC20Interface, OwnerHelper { using SafeMath for uint; string public name; uint public decimals; string public symbol; uint constant private E18 = 1000000000000000000; uint constant private month = 2592000; // Total 300,000,000 uint constant public maxTotalSupply = 300000000 * E18; // Sale 45,000,000 (15%) uint constant public maxSaleSupply = 45000000 * E18; // Development 60,000,000 (20%) uint constant public maxDevSupply = 60000000 * E18; // Marketing 66,000,000 (22%) uint constant public maxMktSupply = 66000000 * E18; // Ecosystem 54,000,000 (18%) uint constant public maxEcoSupply = 54000000 * E18; // Reserve 30,000,000 (10%) uint constant public maxReserveSupply = 30000000 * E18; // Team 30,000,000 (10%) uint constant public maxTeamSupply = 30000000 * E18; // Advisor 15,000,000 (5%) uint constant public maxAdvisorSupply = 15000000 * E18; uint constant public teamVestingSupply = 1250000 * E18; uint constant public teamVestingLockDate = 12 * month; uint constant public teamVestingTime = 24; uint constant public advisorVestingSupply = 1250000 * E18; uint constant public advisorVestingLockDate = 12 * month; uint constant public advisorVestingTime = 12; uint public totalTokenSupply; uint public tokenIssuedSale; uint public tokenIssuedDev; uint public tokenIssuedMkt; uint public tokenIssuedEco; uint public tokenIssuedRsv; uint public tokenIssuedTeam; uint public tokenIssuedAdv; uint public burnTokenSupply; mapping (address => uint) public balances; mapping (address => mapping ( address => uint )) public approvals; mapping (address => uint) public lockWallet; mapping (uint => uint) public tmVestingTimer; mapping (uint => uint) public tmVestingBalances; mapping (uint => uint) public advVestingTimer; mapping (uint => uint) public advVestingBalances; bool public tokenLock = true; bool public saleTime = true; uint public endSaleTime = 0; event SaleIssue(address indexed _to, uint _tokens); event DevIssue(address indexed _to, uint _tokens); event MktIssue(address indexed _to, uint _tokens); event EcoIssue(address indexed _to, uint _tokens); event RsvIssue(address indexed _to, uint _tokens); event TeamIssue(address indexed _to, uint _tokens); event AdvIssue(address indexed _to, uint _tokens); event Burn(address indexed _from, uint _tokens); event TokenUnLock(address indexed _to, uint _tokens); event EndSale(uint _date); constructor() public { name = "MISBLOC"; decimals = 18; symbol = "MSB"; totalTokenSupply = 300000000 * E18; balances[owner] = totalTokenSupply; tokenIssuedSale = 0; tokenIssuedDev = 0; tokenIssuedMkt = 0; tokenIssuedEco = 0; tokenIssuedRsv = 0; tokenIssuedTeam = 0; tokenIssuedAdv = 0; burnTokenSupply = 0; require(maxTotalSupply == maxSaleSupply + maxDevSupply + maxMktSupply + maxEcoSupply + maxReserveSupply + maxTeamSupply + maxAdvisorSupply); } function totalSupply() view public returns (uint) { return totalTokenSupply; } function balanceOf(address _who) view public returns (uint) { uint balance = balances[_who]; balance = balance.add(lockWallet[_who]); return balance; } function transfer(address _to, uint _value) public returns (bool) { require(isTransferable() == true); require(balances[msg.sender] >= _value); balances[msg.sender] = balances[msg.sender].sub(_value); balances[_to] = balances[_to].add(_value); emit Transfer(msg.sender, _to, _value); return true; } function approve(address _spender, uint _value) public returns (bool) { require(isTransferable() == true); require(balances[msg.sender] >= _value); approvals[msg.sender][_spender] = _value; emit Approval(msg.sender, _spender, _value); return true; } function allowance(address _owner, address _spender) view public returns (uint) { return approvals[_owner][_spender]; } function transferFrom(address _from, address _to, uint _value) public returns (bool) { require(isTransferable() == true); require(balances[_from] >= _value); require(approvals[_from][msg.sender] >= _value); approvals[_from][msg.sender] = approvals[_from][msg.sender].sub(_value); balances[_from] = balances[_from].sub(_value); balances[_to] = balances[_to].add(_value); emit Transfer(_from, _to, _value); return true; } function saleIssue(address _to, uint _value) onlyOwner public { uint tokens = _value * E18; require(maxSaleSupply >= tokenIssuedSale.add(tokens)); balances[msg.sender] = balances[msg.sender].sub(tokens); balances[_to] = balances[_to].add(tokens); tokenIssuedSale = tokenIssuedSale.add(tokens); emit SaleIssue(_to, tokens); emit Transfer(msg.sender, _to, tokens); } function devIssue(address _to, uint _value) onlyOwner public { uint tokens = _value * E18; require(saleTime == false); require(maxDevSupply >= tokenIssuedDev.add(tokens)); balances[msg.sender] = balances[msg.sender].sub(tokens); balances[_to] = balances[_to].add(tokens); tokenIssuedDev = tokenIssuedDev.add(tokens); emit DevIssue(_to, tokens); emit Transfer(msg.sender, _to, tokens); } function mktIssue(address _to, uint _value) onlyOwner public { uint tokens = _value * E18; require(saleTime == false); require(maxMktSupply >= tokenIssuedMkt.add(tokens)); balances[msg.sender] = balances[msg.sender].sub(tokens); balances[_to] = balances[_to].add(tokens); tokenIssuedMkt = tokenIssuedMkt.add(tokens); emit MktIssue(_to, tokens); emit Transfer(msg.sender, _to, tokens); } function ecoIssue(address _to, uint _value) onlyOwner public { uint tokens = _value * E18; require(saleTime == false); require(maxEcoSupply >= tokenIssuedEco.add(tokens)); balances[msg.sender] = balances[msg.sender].sub(tokens); balances[_to] = balances[_to].add(tokens); tokenIssuedEco = tokenIssuedEco.add(tokens); emit EcoIssue(_to, tokens); emit Transfer(msg.sender, _to, tokens); } function rsvIssue(address _to, uint _value) onlyOwner public { uint tokens = _value * E18; require(saleTime == false); require(maxReserveSupply >= tokenIssuedRsv.add(tokens)); balances[msg.sender] = balances[msg.sender].sub(tokens); balances[_to] = balances[_to].add(tokens); tokenIssuedRsv = tokenIssuedRsv.add(tokens); emit RsvIssue(_to, tokens); emit Transfer(msg.sender, _to, tokens); } function teamIssue(address _to) onlyOwner public { require(saleTime == false); require(tokenIssuedTeam == 0); uint tokens = maxTeamSupply; balances[msg.sender] = balances[msg.sender].sub(tokens); lockWallet[_to] = lockWallet[_to].add(maxTeamSupply); tokenIssuedTeam = tokenIssuedTeam.add(tokens); emit TeamIssue(_to, tokens); emit Transfer(msg.sender, _to, tokens); } function advisorIssue(address _to) onlyOwner public { require(saleTime == false); require(tokenIssuedAdv == 0); uint tokens = maxAdvisorSupply; balances[msg.sender] = balances[msg.sender].sub(tokens); lockWallet[_to] = lockWallet[_to].add(maxAdvisorSupply); tokenIssuedAdv = tokenIssuedAdv.add(tokens); emit AdvIssue(_to, tokens); emit Transfer(msg.sender, _to, tokens); } function teamUnlock(address _to, uint _time) onlyManager public { require(saleTime == false); require( _time < teamVestingTime); uint nowTime = now; require( nowTime > tmVestingTimer[_time] ); uint tokens = teamVestingSupply; require(tokens == tmVestingBalances[_time]); require(lockWallet[_to] > 0); balances[_to] = balances[_to].add(tokens); tmVestingBalances[_time] = 0; lockWallet[_to] = lockWallet[_to].sub(tokens); emit TokenUnLock(_to, tokens); emit Transfer(msg.sender, _to, tokens); } function advisorUnlock(address _to, uint _time) onlyManager public { require(saleTime == false); require( _time < advisorVestingTime); uint nowTime = now; require( nowTime > advVestingTimer[_time] ); uint tokens = advisorVestingSupply; require(tokens == advVestingBalances[_time]); require(lockWallet[_to] > 0); balances[_to] = balances[_to].add(tokens); advVestingBalances[_time] = 0; lockWallet[_to] = lockWallet[_to].sub(tokens); emit TokenUnLock(_to, tokens); emit Transfer(msg.sender, _to, tokens); } function endSale() onlyOwner public { require(saleTime == true); saleTime = false; uint nowTime = now; endSaleTime = nowTime; for(uint i = 0; i < teamVestingTime; i++) { tmVestingTimer[i] = endSaleTime + teamVestingLockDate + (i * month); tmVestingBalances[i] = teamVestingSupply; } for(uint i = 0; i < advisorVestingTime; i++) { advVestingTimer[i] = endSaleTime + advisorVestingLockDate + (i * advisorVestingLockDate); advVestingBalances[i] = advisorVestingSupply; } emit EndSale(endSaleTime); } function setTokenUnlock() onlyManager public { require(tokenLock == true); require(saleTime == false); tokenLock = false; } function setTokenLock() onlyManager public { require(tokenLock == false); tokenLock = true; } function isTransferable() private view returns (bool) { if(tokenLock == false) { return true; } else if(msg.sender == owner) { return true; } return false; } function transferAnyERC20Token(address tokenAddress, uint tokens) onlyOwner public returns (bool success) { return ERC20Interface(tokenAddress).transfer(manager, tokens); } function burnToken(uint _value) onlyManager public { uint tokens = _value * E18; require(balances[msg.sender] >= tokens); balances[msg.sender] = balances[msg.sender].sub(tokens); burnTokenSupply = burnTokenSupply.add(tokens); totalTokenSupply = totalTokenSupply.sub(tokens); emit Burn(msg.sender, tokens); } function close() onlyOwner public { selfdestruct(msg.sender); } }

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{"success": true, "error": null, "results": {}}

0x8564653879a18c560e7c0ea0e084c516c62f5653

pragma solidity 0.7.1; library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // This method relies in extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. uint256 size; // solhint-disable-next-line no-inline-assembly assembly { size := extcodesize(account) } return size > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require( address(this).balance >= amount, "Address: insufficient balance" ); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{value: amount}(""); require( success, "Address: unable to send value, recipient may have reverted" ); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain`call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return _functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value ) internal returns (bytes memory) { return functionCallWithValue( target, data, value, "Address: low-level call with value failed" ); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require( address(this).balance >= value, "Address: insufficient balance for call" ); return _functionCallWithValue(target, data, value, errorMessage); } function _functionCallWithValue( address target, bytes memory data, uint256 weiValue, string memory errorMessage ) private returns (bytes memory) { require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{value: weiValue}( data ); if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } abstract contract Context { function _msgSender() internal virtual view returns (address payable) { return msg.sender; } function _msgData() internal virtual view returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } contract ERC20Storage { // The state variables we care about. bytes32 constant DIAMOND_STORAGE_POSITION_ERC20 = keccak256( "diamond.standard.diamond.storage.erc20" ); struct TokenStorage { string name; string symbol; uint8 decimals; mapping(address => uint256) balances; mapping(address => mapping(address => uint256)) allowances; uint256 totalSupply; } // Creates and returns the storage pointer to the struct. function erc20Storage() internal pure returns (TokenStorage storage ms) { bytes32 position = DIAMOND_STORAGE_POSITION_ERC20; assembly { ms.slot := position } } } interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom( address sender, address recipient, uint256 amount ) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval( address indexed owner, address indexed spender, uint256 value ); } contract Initializable { /** * @dev Indicates that the contract has been initialized. */ bool private initialized; /** * @dev Indicates that the contract is in the process of being initialized. */ bool private initializing; /** * @dev Modifier to use in the initializer function of a contract. */ modifier initializer() { require( initializing || isConstructor() || !initialized, "Contract instance has already been initialized" ); bool isTopLevelCall = !initializing; if (isTopLevelCall) { initializing = true; initialized = true; } _; if (isTopLevelCall) { initializing = false; } } /// @dev Returns true if and only if the function is running in the constructor function isConstructor() private view returns (bool) { // extcodesize checks the size of the code stored in an address, and // address returns the current address. Since the code is still not // deployed when running a constructor, any checks on its code size will // yield zero, making it an effective way to detect if a contract is // under construction or not. address self = address(this); uint256 cs; assembly { cs := extcodesize(self) } return cs == 0; } // Reserved storage space to allow for layout changes in the future. uint256[50] private ______gap; } contract Migrations { address public owner; uint256 public last_completed_migration; constructor() { owner = msg.sender; } modifier restricted() { if (msg.sender == owner) _; } function setCompleted(uint256 completed) public restricted { last_completed_migration = completed; } } abstract contract Ownable is Initializable { address private _owner; event OwnershipTransferred( address indexed previousOwner, address indexed newOwner ); /** * @dev Initializes the contract setting the deployer as the initial owner. */ function _onInitialize(address sender) internal initializer { _owner = sender; emit OwnershipTransferred(address(0), _owner); } /** * @dev Returns the address of the current owner. */ function owner() public view returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(isOwner(), "Ownable: caller is not the owner"); _; } /** * @dev Returns true if the caller is the current owner. */ function isOwner() public view returns (bool) { return msg.sender == _owner; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * > Note: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public onlyOwner { emit OwnershipTransferred(_owner, address(0)); _owner = address(0); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public onlyOwner { _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). */ function _transferOwnership(address newOwner) internal { require( newOwner != address(0), "Ownable: new owner is the zero address" ); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } } contract PauserRole is Initializable { using Roles for Roles.Role; event PauserAdded(address indexed account); event PauserRemoved(address indexed account); Roles.Role private _pausers; function initialize(address sender) public virtual initializer { if (!isPauser(sender)) { _addPauser(sender); } } modifier onlyPauser() { require( isPauser(msg.sender), "PauserRole: caller does not have the Pauser role" ); _; } function isPauser(address account) public view returns (bool) { return _pausers.has(account); } function addPauser(address account) public onlyPauser { _addPauser(account); } function renouncePauser() public { _removePauser(msg.sender); } function _addPauser(address account) internal { _pausers.add(account); emit PauserAdded(account); } function _removePauser(address account) internal { _pausers.remove(account); emit PauserRemoved(account); } uint256[50] private ______gap; } abstract contract Proxy { /** * @dev Fallback function. * Implemented entirely in `_fallback`. */ fallback() external payable { _fallback(); } /** * @return The Address of the implementation. */ function _implementation() internal virtual view returns (address); /** * @dev Delegates execution to an implementation contract. * This is a low level function that doesn't return to its internal call site. * It will return to the external caller whatever the implementation returns. * @param implementation Address to delegate. */ function _delegate(address implementation) internal { assembly { // Copy msg.data. We take full control of memory in this inline assembly // block because it will not return to Solidity code. We overwrite the // Solidity scratch pad at memory position 0. calldatacopy(0, 0, calldatasize()) // Call the implementation. // out and outsize are 0 because we don't know the size yet. let result := delegatecall( gas(), implementation, 0, calldatasize(), 0, 0 ) // Copy the returned data. returndatacopy(0, 0, returndatasize()) switch result // delegatecall returns 0 on error. case 0 { revert(0, returndatasize()) } default { return(0, returndatasize()) } } } /** * @dev Function that is run as the first thing in the fallback function. * Can be redefined in derived contracts to add functionality. * Redefinitions must call super._willFallback(). */ function _willFallback() internal virtual {} /** * @dev fallback implementation. * Extracted to enable manual triggering. */ function _fallback() internal { _willFallback(); _delegate(_implementation()); } } library Roles { struct Role { mapping(address => bool) bearer; } /** * @dev Give an account access to this role. */ function add(Role storage role, address account) internal { require(!has(role, account), "Roles: account already has role"); role.bearer[account] = true; } /** * @dev Remove an account's access to this role. */ function remove(Role storage role, address account) internal { require(has(role, account), "Roles: account does not have role"); role.bearer[account] = false; } /** * @dev Check if an account has this role. * @return bool */ function has(Role storage role, address account) internal view returns (bool) { require(account != address(0), "Roles: account is the zero address"); return role.bearer[account]; } } library SafeERC20 { using SafeMath for uint256; using Address for address; function safeTransfer( IERC20 token, address to, uint256 value ) internal { _callOptionalReturn( token, abi.encodeWithSelector(token.transfer.selector, to, value) ); } function safeTransferFrom( IERC20 token, address from, address to, uint256 value ) internal { _callOptionalReturn( token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value) ); } function safeApprove( IERC20 token, address spender, uint256 value ) internal { // safeApprove should only be called when setting an initial allowance, // or when resetting it to zero. To increase and decrease it, use // 'safeIncreaseAllowance' and 'safeDecreaseAllowance' // solhint-disable-next-line max-line-length require( (value == 0) || (token.allowance(address(this), spender) == 0), "SafeERC20: approve from non-zero to non-zero allowance" ); _callOptionalReturn( token, abi.encodeWithSelector(token.approve.selector, spender, value) ); } function safeIncreaseAllowance( IERC20 token, address spender, uint256 value ) internal { uint256 newAllowance = token.allowance(address(this), spender).add( value ); _callOptionalReturn( token, abi.encodeWithSelector( token.approve.selector, spender, newAllowance ) ); } function safeDecreaseAllowance( IERC20 token, address spender, uint256 value ) internal { uint256 newAllowance = token.allowance(address(this), spender).sub( value, "SafeERC20: decreased allowance below zero" ); _callOptionalReturn( token, abi.encodeWithSelector( token.approve.selector, spender, newAllowance ) ); } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). */ function _callOptionalReturn(IERC20 token, bytes memory data) private { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. // A Solidity high level call has three parts: // 1. The target address is checked to verify it contains contract code // 2. The call itself is made, and success asserted // 3. The return value is decoded, which in turn checks the size of the returned data. // solhint-disable-next-line max-line-length require(address(token).isContract(), "SafeERC20: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = address(token).call(data); require(success, "SafeERC20: low-level call failed"); if (returndata.length > 0) { // Return data is optional // solhint-disable-next-line max-line-length require( abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed" ); } } } library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub( uint256 a, uint256 b, string memory errorMessage ) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div( uint256 a, uint256 b, string memory errorMessage ) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod( uint256 a, uint256 b, string memory errorMessage ) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } abstract contract BaseUpgradeabilityProxy is Proxy { /** * @dev Emitted when the implementation is upgraded. * @param implementation Address of the new implementation. */ event Upgraded(address indexed implementation); bytes32 constant DIAMOND_STORAGE_POSITION = keccak256( "diamond.standard.diamond.storage.proxy" ); struct DiamondStorage { // owner of the contract address proxyAdmin; address implementation; } function diamondStorage() internal pure returns (DiamondStorage storage ds) { bytes32 position = DIAMOND_STORAGE_POSITION; assembly { ds.slot := position } } /** * @dev Storage slot with the address of the current implementation. * This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1, and is * validated in the constructor. */ // bytes32 internal constant IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc; /** * @dev Returns the current implementation. * @return impl Address of the current implementation */ function _implementation() internal override view returns (address) { DiamondStorage storage ms = diamondStorage(); return ms.implementation; } /** * @dev Upgrades the proxy to a new implementation. * @param newImplementation Address of the new implementation. */ function _upgradeTo(address newImplementation) internal { _setImplementation(newImplementation); emit Upgraded(newImplementation); } /** * @dev Sets the implementation address of the proxy. * @param newImplementation Address of the new implementation. */ function _setImplementation(address newImplementation) internal { require( Address.isContract(newImplementation), "Cannot set a proxy implementation to a non-contract address" ); DiamondStorage storage ms = diamondStorage(); require( newImplementation != ms.implementation, "Proxy implementation is already set to this address" ); ms.implementation = newImplementation; } } contract CanReclaimEther is Ownable { function reclaimEther() external onlyOwner { msg.sender.transfer(address(this).balance); } } contract CanReclaimToken is Ownable { using SafeERC20 for IERC20; function reclaimToken(IERC20 token) external onlyOwner { uint256 balance = token.balanceOf(address(this)); token.safeTransfer(owner(), balance); } } contract ERC20 is Context, Initializable, IERC20, ERC20Storage { using SafeMath for uint256; using Address for address; /** * @dev Sets the values for `name`, `symbol`, and `decimals`. All three of * these values are immutable: they can only be set once during * construction. */ function initialize( string memory name, string memory symbol, uint8 decimals ) public initializer { _onInitialize(name, symbol, decimals); } function _onInitialize( string memory name, string memory symbol, uint8 decimals ) internal initializer { TokenStorage storage ercs = erc20Storage(); ercs.name = name; ercs.symbol = symbol; ercs.decimals = decimals; } /** * @dev Returns the name of the token. */ function name() public view returns (string memory) { TokenStorage storage ercs = erc20Storage(); return ercs.name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view returns (string memory) { TokenStorage storage ercs = erc20Storage(); return ercs.symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5,05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view returns (uint8) { TokenStorage storage ercs = erc20Storage(); return ercs.decimals; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public override view returns (uint256) { TokenStorage storage ercs = erc20Storage(); return ercs.totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public override view returns (uint256) { TokenStorage storage ercs = erc20Storage(); return ercs.balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `recipient` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address recipient, uint256 amount) public virtual override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public virtual override view returns (uint256) { TokenStorage storage ercs = erc20Storage(); return ercs.allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { _approve(_msgSender(), spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}; * * Requirements: * - `sender` and `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. * - the caller must have allowance for `sender`'s tokens of at least * `amount`. */ function transferFrom( address sender, address recipient, uint256 amount ) public virtual override returns (bool) { _transfer(sender, recipient, amount); TokenStorage storage ercs = erc20Storage(); _approve( sender, _msgSender(), ercs.allowances[sender][_msgSender()].sub( amount, "ERC20: transfer amount exceeds allowance" ) ); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { TokenStorage storage ercs = erc20Storage(); _approve( _msgSender(), spender, ercs.allowances[_msgSender()][spender].add(addedValue) ); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { TokenStorage storage ercs = erc20Storage(); _approve( _msgSender(), spender, ercs.allowances[_msgSender()][spender].sub( subtractedValue, "ERC20: decreased allowance below zero" ) ); return true; } /** * @dev Moves tokens `amount` from `sender` to `recipient`. * * This is internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `sender` cannot be the zero address. * - `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. */ function _transfer( address sender, address recipient, uint256 amount ) internal virtual { require(sender != address(0), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); TokenStorage storage ercs = erc20Storage(); _beforeTokenTransfer(sender, recipient, amount); ercs.balances[sender] = ercs.balances[sender].sub( amount, "ERC20: transfer amount exceeds balance" ); ercs.balances[recipient] = ercs.balances[recipient].add(amount); emit Transfer(sender, recipient, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements * * - `to` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); TokenStorage storage ercs = erc20Storage(); ercs.totalSupply = ercs.totalSupply.add(amount); ercs.balances[account] = ercs.balances[account].add(amount); emit Transfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); TokenStorage storage ercs = erc20Storage(); ercs.balances[account] = ercs.balances[account].sub( amount, "ERC20: burn amount exceeds balance" ); ercs.totalSupply = ercs.totalSupply.sub(amount); emit Transfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens. * * This is internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve( address owner, address spender, uint256 amount ) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); TokenStorage storage ercs = erc20Storage(); ercs.allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Sets {decimals} to a value other than the default one of 18. * * WARNING: This function should only be called from the constructor. Most * applications that interact with token contracts will not expect * {decimals} to ever change, and may work incorrectly if it does. */ function _setupDecimals(uint8 decimals_) internal { TokenStorage storage ercs = erc20Storage(); ercs.decimals = decimals_; } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be to transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer( address from, address to, uint256 amount ) internal virtual {} uint256[50] private ______gap; } abstract contract ERC20Burnable is Context, ERC20 { using SafeMath for uint256; /** * @dev Destroys `amount` tokens from the caller. * * See {ERC20-_burn}. */ function burn(uint256 amount) public virtual { _burn(_msgSender(), amount); } /** * @dev Destroys `amount` tokens from `account`, deducting from the caller's * allowance. * * See {ERC20-_burn} and {ERC20-allowance}. * * Requirements: * * - the caller must have allowance for ``accounts``'s tokens of at least * `amount`. */ function burnFrom(address account, uint256 amount) public virtual { uint256 decreasedAllowance = allowance(account, _msgSender()).sub( amount, "ERC20: burn amount exceeds allowance" ); _approve(account, _msgSender(), decreasedAllowance); _burn(account, amount); } } abstract contract InitializableUpgradeabilityProxy is BaseUpgradeabilityProxy { /** * @dev Contract initializer. * @param _logic Address of the initial implementation. * @param _data Data to send as msg.data to the implementation to initialize the proxied contract. * It should include the signature and the parameters of the function to be called, as described in * https://solidity.readthedocs.io/en/v0.4.24/abi-spec.html#function-selector-and-argument-encoding. * This parameter is optional, if no data is given the initialization call to proxied contract will be skipped. */ function initialize(address _logic, bytes memory _data) public virtual payable { require(_implementation() == address(0)); assert( DIAMOND_STORAGE_POSITION == keccak256("diamond.standard.diamond.storage.proxy") ); _setImplementation(_logic); if (_data.length > 0) { (bool success, ) = _logic.delegatecall(_data); require(success); } } } contract Pausable is Initializable, PauserRole { /** * @dev Emitted when the pause is triggered by a pauser (`account`). */ event Paused(address account); /** * @dev Emitted when the pause is lifted by a pauser (`account`). */ event Unpaused(address account); bool private _paused; /** * @dev Initializes the contract in unpaused state. Assigns the Pauser role * to the deployer. */ function initialize(address sender) public override initializer { PauserRole.initialize(sender); _paused = false; } /** * @dev Returns true if the contract is paused, and false otherwise. */ function paused() public view returns (bool) { return _paused; } /** * @dev Modifier to make a function callable only when the contract is not paused. */ modifier whenNotPaused() { require(!_paused, "Pausable: paused"); _; } /** * @dev Modifier to make a function callable only when the contract is paused. */ modifier whenPaused() { require(_paused, "Pausable: not paused"); _; } /** * @dev Called by a pauser to pause, triggers stopped state. */ function pause() public onlyPauser whenNotPaused { _paused = true; emit Paused(msg.sender); } /** * @dev Called by a pauser to unpause, returns to normal state. */ function unpause() public onlyPauser whenPaused { _paused = false; emit Unpaused(msg.sender); } uint256[50] private ______gap; } abstract contract UpgradeabilityProxy is BaseUpgradeabilityProxy { /** * @dev Contract constructor. * @param _logic Address of the initial implementation. * @param _data Data to send as msg.data to the implementation to initialize the proxied contract. * It should include the signature and the parameters of the function to be called, as described in * https://solidity.readthedocs.io/en/v0.4.24/abi-spec.html#function-selector-and-argument-encoding. * This parameter is optional, if no data is given the initialization call to proxied contract will be skipped. */ constructor(address _logic, bytes memory _data) payable { assert( DIAMOND_STORAGE_POSITION == keccak256("diamond.standard.diamond.storage.proxy") ); //assert(IMPLEMENTATION_SLOT == bytes32(uint256(keccak256("eip1967.proxy.implementation")) - 1)); _setImplementation(_logic); if (_data.length > 0) { (bool success, ) = _logic.delegatecall(_data); require(success); } } } abstract contract BaseAdminUpgradeabilityProxy is BaseUpgradeabilityProxy { /** * @dev Emitted when the administration has been transferred. * @param previousAdmin Address of the previous admin. * @param newAdmin Address of the new admin. */ event AdminChanged(address previousAdmin, address newAdmin); /** * @dev Storage slot with the admin of the contract. * This is the keccak-256 hash of "eip1967.proxy.admin" subtracted by 1, and is * validated in the constructor. */ // bytes32 internal constant ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103; /** * @dev Modifier to check whether the `msg.sender` is the admin. * If it is, it will run the function. Otherwise, it will delegate the call * to the implementation. */ modifier ifAdmin() { if (msg.sender == _admin()) { _; } else { _fallback(); } } /** * @return The address of the proxy admin. */ function admin() external ifAdmin returns (address) { return _admin(); } /** * @return The address of the implementation. */ function implementation() external ifAdmin returns (address) { return _implementation(); } /** * @dev Changes the admin of the proxy. * Only the current admin can call this function. * @param newAdmin Address to transfer proxy administration to. */ function changeAdmin(address newAdmin) external ifAdmin { require( newAdmin != address(0), "Cannot change the admin of a proxy to the zero address" ); emit AdminChanged(_admin(), newAdmin); _setAdmin(newAdmin); } /** * @dev Upgrade the backing implementation of the proxy. * Only the admin can call this function. * @param newImplementation Address of the new implementation. */ function upgradeTo(address newImplementation) external ifAdmin { _upgradeTo(newImplementation); } /** * @dev Upgrade the backing implementation of the proxy and call a function * on the new implementation. * This is useful to initialize the proxied contract. * @param newImplementation Address of the new implementation. * @param data Data to send as msg.data in the low level call. * It should include the signature and the parameters of the function to be called, as described in * https://solidity.readthedocs.io/en/v0.4.24/abi-spec.html#function-selector-and-argument-encoding. */ function upgradeToAndCall(address newImplementation, bytes calldata data) external payable ifAdmin { _upgradeTo(newImplementation); (bool success, ) = newImplementation.delegatecall(data); require( success, "upgradeToAndCall: delegatecall should be successfull" ); } /** * @return adm The admin slot. */ function _admin() internal view returns (address) { DiamondStorage storage ms = diamondStorage(); return ms.proxyAdmin; } /** * @dev Sets the address of the proxy admin. * @param newAdmin Address of the new proxy admin. */ function _setAdmin(address newAdmin) internal { DiamondStorage storage ms = diamondStorage(); ms.proxyAdmin = newAdmin; } /** * @dev Only fall back when the sender is not the admin. */ /* function _willFallback() override(Proxy) internal { require(msg.sender != _admin(), "Cannot call fallback function from the proxy admin"); super._willFallback(); } */ } abstract contract ERC20Pausable is ERC20, Pausable { /** * @dev See {ERC20-_beforeTokenTransfer}. * * Requirements: * * - the contract must not be paused. */ function _beforeTokenTransfer( address from, address to, uint256 amount ) internal virtual override { super._beforeTokenTransfer(from, to, amount); require(!paused(), "ERC20Pausable: token transfer while paused"); } } contract OwnedUpgradeabilityProxy is BaseAdminUpgradeabilityProxy, InitializableUpgradeabilityProxy { /** * Contract constructor. * @param _logic address of the initial implementation. * @param _admin Address of the proxy administrator. * @param _data Data to send as msg.data to the implementation to initialize the proxied contract. * It should include the signature and the parameters of the function to be called, as described in * https://solidity.readthedocs.io/en/v0.4.24/abi-spec.html#function-selector-and-argument-encoding. * This parameter is optional, if no data is given the initialization call to proxied contract will be skipped. */ function initialize( address _logic, address _admin, bytes memory _data ) public payable { require(_implementation() == address(0)); InitializableUpgradeabilityProxy.initialize(_logic, _data); _setAdmin(_admin); emit Initialized(_admin, _logic); } event Initialized(address admin, address _logic); /** * @dev Only fall back when the sender is not the admin. */ // prettier-ignore function _willFallback() override internal { require( _admin() != address(0), "Can't fallback if admin is not set" ); require( msg.sender != _admin(), "Cannot call fallback function from the proxy admin" ); super._willFallback(); } } contract UbxToken is Initializable, Ownable, ERC20, ERC20Burnable, ERC20Pausable, CanReclaimEther, CanReclaimToken { function initialize( string memory name, string memory symbol, uint8 decimals, uint256 initialSupply, address initialHolder, address owner, address[] memory pausers ) public initializer { require(pausers.length > 0, "At least one pauser should be defined"); ERC20.initialize(name, symbol, decimals); Ownable._onInitialize(owner); Pausable.initialize(pausers[0]); for (uint256 i = 1; i < pausers.length; ++i) { _addPauser(pausers[i]); } // create the tokens _mint(initialHolder, initialSupply); } /** * @dev See {ERC20-_beforeTokenTransfer}. * * Requirements: * * - the contract must not be paused. */ function _beforeTokenTransfer( address from, address to, uint256 amount ) internal virtual override(ERC20, ERC20Pausable) { super._beforeTokenTransfer(from, to, amount); } }

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{"success": true, "error": null, "results": {"detectors": [{"check": "controlled-delegatecall", "impact": "High", "confidence": "Medium"}, {"check": "shadowing-state", "impact": "High", "confidence": "High"}]}}

0x86695353099a22607bde0002868d13c6efa64a90

pragma solidity 0.4.21; contract EIP20Interface { /* This is a slight change to the ERC20 base standard. function totalSupply() constant returns (uint256 supply); is replaced with: uint256 public totalSupply; This automatically creates a getter function for the totalSupply. This is moved to the base contract since public getter functions are not currently recognised as an implementation of the matching abstract function by the compiler. */ /// total amount of tokens uint256 public totalSupply; /// @param _owner The address from which the balance will be retrieved /// @return The balance function balanceOf(address _owner) public view returns (uint256 balance); /// @notice send `_value` token to `_to` from `msg.sender` /// @param _to The address of the recipient /// @param _value The amount of token to be transferred /// @return Whether the transfer was successful or not function transfer(address _to, uint256 _value) public returns (bool success); /// @notice send `_value` token to `_to` from `_from` on the condition it is approved by `_from` /// @param _from The address of the sender /// @param _to The address of the recipient /// @param _value The amount of token to be transferred /// @return Whether the transfer was successful or not function transferFrom(address _from, address _to, uint256 _value) public returns (bool success); /// @notice `msg.sender` approves `_spender` to spend `_value` tokens /// @param _spender The address of the account able to transfer the tokens /// @param _value The amount of tokens to be approved for transfer /// @return Whether the approval was successful or not function approve(address _spender, uint256 _value) public returns (bool success); /// @param _owner The address of the account owning tokens /// @param _spender The address of the account able to transfer the tokens /// @return Amount of remaining tokens allowed to spent function allowance(address _owner, address _spender) public view returns (uint256 remaining); // solhint-disable-next-line no-simple-event-func-name event Transfer(address indexed _from, address indexed _to, uint256 _value); event Approval(address indexed _owner, address indexed _spender, uint256 _value); } contract ETY is EIP20Interface { uint256 constant private MAX_UINT256 = 2**256 - 1; mapping (address => uint256) public balances; mapping (address => mapping (address => uint256)) public allowed; /* NOTE: The following variables are OPTIONAL vanities. One does not have to include them. They allow one to customise the token contract & in no way influences the core functionality. Some wallets/interfaces might not even bother to look at this information. */ string public name; //fancy name: eg Simon Bucks uint8 public decimals; //How many decimals to show. string public symbol; //An identifier: eg SBX function ETY( uint256 _initialAmount, string _tokenName, uint8 _decimalUnits, string _tokenSymbol ) public { balances[msg.sender] = _initialAmount; // Give the creator all initial tokens totalSupply = _initialAmount; // Update total supply name = _tokenName; // Set the name for display purposes decimals = _decimalUnits; // Amount of decimals for display purposes symbol = _tokenSymbol; // Set the symbol for display purposes } function transfer(address _to, uint256 _value) public returns (bool success) { require(balances[msg.sender] >= _value); balances[msg.sender] -= _value; balances[_to] += _value; emit Transfer(msg.sender, _to, _value); //solhint-disable-line indent, no-unused-vars return true; } function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) { uint256 allowance = allowed[_from][msg.sender]; require(balances[_from] >= _value && allowance >= _value); balances[_to] += _value; balances[_from] -= _value; if (allowance < MAX_UINT256) { allowed[_from][msg.sender] -= _value; } emit Transfer(_from, _to, _value); //solhint-disable-line indent, no-unused-vars return true; } function balanceOf(address _owner) public view returns (uint256 balance) { return balances[_owner]; } function approve(address _spender, uint256 _value) public returns (bool success) { allowed[msg.sender][_spender] = _value; emit Approval(msg.sender, _spender, _value); //solhint-disable-line indent, no-unused-vars return true; } function allowance(address _owner, address _spender) public view returns (uint256 remaining) { return allowed[_owner][_spender]; } }

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{"success": true, "error": null, "results": {}}

0x86917c43417C9776A6968dbf3990f45575F9f2f2

pragma solidity 0.6.10; interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } contract FounderPool { IERC20 public Token; uint256 public blocklock; address public bucket; constructor( IERC20 Tokent, address buckt ) public { Token = Tokent; bucket = buckt; } uint256 public balmin; function tap() public { require(blocklock <= now, "block"); if (balmin < Token.balanceOf(address(this))/24) { balmin = Token.balanceOf(address(this))/24; } if (balmin >Token.balanceOf(address(this))){ Token.transfer(bucket, Token.balanceOf(address(this))); } else{ Token.transfer(bucket, balmin); } blocklock = now + 14 days; } }

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{"success": true, "error": null, "results": {"detectors": [{"check": "unchecked-transfer", "impact": "High", "confidence": "Medium"}, {"check": "reentrancy-no-eth", "impact": "Medium", "confidence": "Medium"}]}}

0x86b5a0040128a7022fa6ab45391a899c2261e07c

pragma solidity 0.6.12; interface RewardPool { function df() external returns (address); function stake(uint) external; function withdraw(uint) external; function getReward() external; function earned(address) external view returns (uint); } contract Initializable { /** * @dev Indicates that the contract has been initialized. */ bool private initialized; /** * @dev Indicates that the contract is in the process of being initialized. */ bool private initializing; /** * @dev Modifier to use in the initializer function of a contract. */ modifier initializer() { require(initializing || isConstructor() || !initialized, "Contract instance has already been initialized"); bool isTopLevelCall = !initializing; if (isTopLevelCall) { initializing = true; initialized = true; } _; if (isTopLevelCall) { initializing = false; } } /** * @dev Modifier to use in the initializer function of a contract when upgrade EVEN times. */ modifier initializerEven() { require(initializing || isConstructor() || initialized, "Contract instance has already been initialized EVEN times"); bool isTopLevelCall = !initializing; if (isTopLevelCall) { initializing = true; initialized = false; } _; if (isTopLevelCall) { initializing = false; } } /// @dev Returns true if and only if the function is running in the constructor function isConstructor() private view returns (bool) { // extcodesize checks the size of the code stored in an address, and // address returns the current address. Since the code is still not // deployed when running a constructor, any checks on its code size will // yield zero, making it an effective way to detect if a contract is // under construction or not. address self = address(this); uint256 cs; assembly { cs := extcodesize(self) } return cs == 0; } // Reserved storage space to allow for layout changes in the future. uint256[50] private ______gap; } contract Governable is Initializable { address public governor; event GovernorshipTransferred(address indexed previousGovernor, address indexed newGovernor); /** * @dev Contract initializer. * called once by the factory at time of deployment */ function initialize(address governor_) virtual public initializer { governor = governor_; emit GovernorshipTransferred(address(0), governor); } modifier governance() { require(msg.sender == governor); _; } /** * @dev Allows the current governor to relinquish control of the contract. * @notice Renouncing to governorship will leave the contract without an governor. * It will not be possible to call the functions with the `governance` * modifier anymore. */ function renounceGovernorship() public governance { emit GovernorshipTransferred(governor, address(0)); governor = address(0); } /** * @dev Allows the current governor to transfer control of the contract to a newGovernor. * @param newGovernor The address to transfer governorship to. */ function transferGovernorship(address newGovernor) public governance { _transferGovernorship(newGovernor); } /** * @dev Transfers control of the contract to a newGovernor. * @param newGovernor The address to transfer governorship to. */ function _transferGovernorship(address newGovernor) internal { require(newGovernor != address(0)); emit GovernorshipTransferred(governor, newGovernor); governor = newGovernor; } } contract Configurable is Governable { mapping (bytes32 => uint) internal config; function getConfig(bytes32 key) public view returns (uint) { return config[key]; } function getConfig(bytes32 key, uint index) public view returns (uint) { return config[bytes32(uint(key) ^ index)]; } function getConfig(bytes32 key, address addr) public view returns (uint) { return config[bytes32(uint(key) ^ uint(addr))]; } function _setConfig(bytes32 key, uint value) internal { if(config[key] != value) config[key] = value; } function _setConfig(bytes32 key, uint index, uint value) internal { _setConfig(bytes32(uint(key) ^ index), value); } function _setConfig(bytes32 key, address addr, uint value) internal { _setConfig(bytes32(uint(key) ^ uint(addr)), value); } function setConfig(bytes32 key, uint value) external governance { _setConfig(key, value); } function setConfig(bytes32 key, uint index, uint value) external governance { _setConfig(bytes32(uint(key) ^ index), value); } function setConfig(bytes32 key, address addr, uint value) external governance { _setConfig(bytes32(uint(key) ^ uint(addr)), value); } } interface Minter { event Minted(address indexed recipient, address reward_contract, uint minted); function token() external view returns (address); function controller() external view returns (address); function minted(address, address) external view returns (uint); function allowed_to_mint_for(address, address) external view returns (bool); function mint(address gauge) external; function mint_many(address[8] calldata gauges) external; function mint_for(address gauge, address _for) external; function toggle_approve_mint(address minting_user) external; } interface LiquidityGauge { event Deposit(address indexed provider, uint value); event Withdraw(address indexed provider, uint value); event UpdateLiquidityLimit(address user, uint original_balance, uint original_supply, uint working_balance, uint working_supply); function user_checkpoint (address addr) external returns (bool); function claimable_tokens(address addr) external view returns (uint); function claimable_reward(address addr) external view returns (uint); function integrate_checkpoint() external view returns (uint); function kick(address addr) external; function set_approve_deposit(address addr, bool can_deposit) external; function deposit(uint _value) external; function deposit(uint _value, address addr) external; function withdraw(uint _value) external; function withdraw(uint _value, bool claim_rewards) external; function claim_rewards() external; function claim_rewards(address addr) external; function minter() external view returns (address); function crv_token() external view returns (address); function lp_token() external view returns (address); function controller() external view returns (address); function voting_escrow() external view returns (address); function balanceOf(address) external view returns (uint); function totalSupply() external view returns (uint); function future_epoch_time() external view returns (uint); function approved_to_deposit(address, address) external view returns (bool); function working_balances(address) external view returns (uint); function working_supply() external view returns (uint); function period() external view returns (int128); function period_timestamp(uint) external view returns (uint); function integrate_inv_supply(uint) external view returns (uint); function integrate_inv_supply_of(address) external view returns (uint); function integrate_checkpoint_of(address) external view returns (uint); function integrate_fraction(address) external view returns (uint); function inflation_rate() external view returns (uint); function reward_contract() external view returns (address); function rewarded_token() external view returns (address); function reward_integral() external view returns (uint); function reward_integral_for(address) external view returns (uint); function rewards_for(address) external view returns (uint); function claimed_rewards_for(address) external view returns (uint); } contract SSimpleGauge is LiquidityGauge, Configurable { using SafeMath for uint; using TransferHelper for address; address override public minter; address override public crv_token; address override public lp_token; address override public controller; address override public voting_escrow; mapping(address => uint) override public balanceOf; uint override public totalSupply; uint override public future_epoch_time; // caller -> recipient -> can deposit? mapping(address => mapping(address => bool)) override public approved_to_deposit; mapping(address => uint) override public working_balances; uint override public working_supply; // The goal is to be able to calculate ∫(rate * balance / totalSupply dt) from 0 till checkpoint // All values are kept in units of being multiplied by 1e18 int128 override public period; uint256[100000000000000000000000000000] override public period_timestamp; // 1e18 * ∫(rate(t) / totalSupply(t) dt) from 0 till checkpoint uint256[100000000000000000000000000000] override public integrate_inv_supply; // bump epoch when rate() changes // 1e18 * ∫(rate(t) / totalSupply(t) dt) from (last_action) till checkpoint mapping(address => uint) override public integrate_inv_supply_of; mapping(address => uint) override public integrate_checkpoint_of; // ∫(balance * rate(t) / totalSupply(t) dt) from 0 till checkpoint // Units: rate * t = already number of coins per address to issue mapping(address => uint) override public integrate_fraction; uint override public inflation_rate; // For tracking external rewards address override public reward_contract; address override public rewarded_token; uint override public reward_integral; mapping(address => uint) override public reward_integral_for; mapping(address => uint) override public rewards_for; mapping(address => uint) override public claimed_rewards_for; uint public span; uint public end; function initialize(address governor, address _minter, address _lp_token) public initializer { super.initialize(governor); minter = _minter; crv_token = Minter(_minter).token(); lp_token = _lp_token; IERC20(lp_token).totalSupply(); // just check } function setSpan(uint _span, bool isLinear) virtual external governance { span = _span; if(isLinear) end = now + _span; else end = 0; } function kick(address addr) virtual override external { _checkpoint(addr, true); } function set_approve_deposit(address addr, bool can_deposit) virtual override external { approved_to_deposit[addr][msg.sender] = can_deposit; } function deposit(uint amount) virtual override external { deposit(amount, msg.sender); } function deposit(uint amount, address addr) virtual override public { require(addr == msg.sender || approved_to_deposit[msg.sender][addr], 'Not approved'); _checkpoint(addr, true); _deposit(addr, amount); balanceOf[addr] = balanceOf[addr].add(amount); totalSupply = totalSupply.add(amount); emit Deposit(addr, amount); } function _deposit(address addr, uint amount) virtual internal { lp_token.safeTransferFrom(addr, address(this), amount); } function withdraw() virtual external { withdraw(balanceOf[msg.sender], true); } function withdraw(uint amount) virtual override external { withdraw(amount, true); } function withdraw(uint amount, bool claim_rewards) virtual override public { _checkpoint(msg.sender, claim_rewards); totalSupply = totalSupply.sub(amount); balanceOf[msg.sender] = balanceOf[msg.sender].sub(amount); _withdraw(msg.sender, amount); emit Withdraw(msg.sender, amount); } function _withdraw(address to, uint amount) virtual internal { lp_token.safeTransfer(to, amount); } function claimable_reward(address) virtual override public view returns (uint) { return 0; } function claim_rewards() virtual override public { return claim_rewards(msg.sender); } function claim_rewards(address) virtual override public { return; } function _checkpoint_rewards(address, bool) virtual internal { return; } function claimable_tokens(address addr) virtual override public view returns (uint amount) { if(span == 0 || totalSupply == 0) return 0; amount = SMinter(minter).quotas(address(this)); amount = amount.mul(balanceOf[addr]).div(totalSupply); uint lasttime = integrate_checkpoint_of[addr]; if(end == 0) { // isNonLinear, endless if(now.sub(lasttime) < span) amount = amount.mul(now.sub(lasttime)).div(span); }else if(now < end) amount = amount.mul(now.sub(lasttime)).div(end.sub(lasttime)); else if(lasttime >= end) amount = 0; } function _checkpoint(address addr, uint amount) virtual internal { if(amount > 0) { integrate_fraction[addr] = integrate_fraction[addr].add(amount); address teamAddr = address(config['teamAddr']); uint teamRatio = config['teamRatio']; if(teamAddr != address(0) && teamRatio != 0) integrate_fraction[teamAddr] = integrate_fraction[teamAddr].add(amount.mul(teamRatio).div(1 ether)); } } function _checkpoint(address addr, bool _claim_rewards) virtual internal { uint amount = claimable_tokens(addr); _checkpoint(addr, amount); _checkpoint_rewards(addr, _claim_rewards); integrate_checkpoint_of[addr] = now; } function user_checkpoint(address addr) virtual override external returns (bool) { _checkpoint(addr, true); return true; } function integrate_checkpoint() override external view returns (uint) { return now; } } c SExactGauge is LiquidityGauge, Configurable { using SafeMath for uint; using TransferHelper for address; bytes32 internal constant _devAddr_ = 'devAddr'; bytes32 internal constant _devRatio_ = 'devRatio'; bytes32 internal constant _ecoAddr_ = 'ecoAddr'; bytes32 internal constant _ecoRatio_ = 'ecoRatio'; bytes32 internal constant _claim_rewards_ = 'claim_rewards'; address override public minter; address override public crv_token; address override public lp_token; address override public controller; address override public voting_escrow; mapping(address => uint) override public balanceOf; uint override public totalSupply; uint override public future_epoch_time; // caller -> recipient -> can deposit? mapping(address => mapping(address => bool)) override public approved_to_deposit; mapping(address => uint) override public working_balances; uint override public working_supply; // The goal is to be able to calculate ∫(rate * balance / totalSupply dt) from 0 till checkpoint // All values are kept in units of being multiplied by 1e18 int128 override public period; uint256[100000000000000000000000000000] override public period_timestamp; // 1e18 * ∫(rate(t) / totalSupply(t) dt) from 0 till checkpoint uint256[100000000000000000000000000000] override public integrate_inv_supply; // bump epoch when rate() changes // 1e18 * ∫(rate(t) / totalSupply(t) dt) from (last_action) till checkpoint mapping(address => uint) override public integrate_inv_supply_of; mapping(address => uint) override public integrate_checkpoint_of; // ∫(balance * rate(t) / totalSupply(t) dt) from 0 till checkpoint // Units: rate * t = already number of coins per address to issue mapping(address => uint) override public integrate_fraction; uint override public inflation_rate; // For tracking external rewards address override public reward_contract; address override public rewarded_token; mapping(address => uint) public reward_integral_; // rewarded_token => reward_integral mapping(address => mapping(address => uint)) public reward_integral_for_; // recipient => rewarded_token => reward_integral_for mapping(address => mapping(address => uint)) public rewards_for_; mapping(address => mapping(address => uint)) public claimed_rewards_for_; uint public span; uint public end; mapping(address => uint) public sumMiningPerOf; uint public sumMiningPer; uint public bufReward; uint public lasttime; function initialize(address governor, address _minter, address _lp_token) public initializer { super.initialize(governor); minter = _minter; crv_token = Minter(_minter).token(); lp_token = _lp_token; IERC20(lp_token).totalSupply(); // just check } function setSpan(uint _span, bool isLinear) virtual external governance { span = _span; if(isLinear) end = now + _span; else end = 0; if(lasttime == 0) lasttime = now; } function kick(address addr) virtual override external { _checkpoint(addr, true); } function set_approve_deposit(address addr, bool can_deposit) virtual override external { approved_to_deposit[addr][msg.sender] = can_deposit; } function deposit(uint amount) virtual override external { deposit(amount, msg.sender); } function deposit(uint amount, address addr) virtual override public { require(addr == msg.sender || approved_to_deposit[msg.sender][addr], 'Not approved'); _checkpoint(addr, config[_claim_rewards_] == 0 ? false : true); _deposit(addr, amount); balanceOf[msg.sender] = balanceOf[msg.sender].add(amount); totalSupply = totalSupply.add(amount); emit Deposit(msg.sender, amount); } function _deposit(address addr, uint amount) virtual internal { lp_token.safeTransferFrom(addr, address(this), amount); } function withdraw() virtual external { withdraw(balanceOf[msg.sender]); } function withdraw(uint amount) virtual override public { withdraw(amount, config[_claim_rewards_] == 0 ? false : true); } function withdraw(uint amount, bool _claim_rewards) virtual override public { _checkpoint(msg.sender, _claim_rewards); totalSupply = totalSupply.sub(amount); balanceOf[msg.sender] = balanceOf[msg.sender].sub(amount); _withdraw(msg.sender, amount); emit Withdraw(msg.sender, amount); } function _withdraw(address to, uint amount) virtual internal { lp_token.safeTransfer(to, amount); } function claimable_reward(address addr) virtual override public view returns (uint) { addr; return 0; } function claim_rewards() virtual override public { return claim_rewards(msg.sender); } function claim_rewards(address) virtual override public { return; } function _checkpoint_rewards(address, bool) virtual internal { return; } function claimable_tokens(address addr) virtual override public view returns (uint r) { r = integrate_fraction[addr].sub(Minter(minter).minted(addr, address(this))); r = r.add(_claimable_last(addr, claimableDelta(), sumMiningPer, sumMiningPerOf[addr])); } function _claimable_last(address addr, uint delta, uint sumPer, uint lastSumPer) virtual internal view returns (uint amount) { if(span == 0 || totalSupply == 0) return 0; amount = sumPer.sub(lastSumPer); amount = amount.add(delta.mul(1 ether).div(totalSupply)); amount = amount.mul(balanceOf[addr]).div(1 ether); } function claimableDelta() virtual internal view returns(uint amount) { if(span == 0 || totalSupply == 0) return 0; amount = SMinter(minter).quotas(address(this)).sub(bufReward); if(end == 0) { // isNonLinear, endless if(now.sub(lasttime) < span) amount = amount.mul(now.sub(lasttime)).div(span); }else if(now < end) amount = amount.mul(now.sub(lasttime)).div(end.sub(lasttime)); else if(lasttime >= end) amount = 0; } function _checkpoint(address addr, uint amount) virtual internal { if(amount > 0) { integrate_fraction[addr] = integrate_fraction[addr].add(amount); addr = address(config[_devAddr_]); uint ratio = config[_devRatio_]; if(addr != address(0) && ratio != 0) integrate_fraction[addr] = integrate_fraction[addr].add(amount.mul(ratio).div(1 ether)); addr = address(config[_ecoAddr_]); ratio = config[_ecoRatio_]; if(addr != address(0) && ratio != 0) integrate_fraction[addr] = integrate_fraction[addr].add(amount.mul(ratio).div(1 ether)); } } function _checkpoint(address addr, bool _claim_rewards) virtual internal { if(span == 0 || totalSupply == 0) return; uint delta = claimableDelta(); uint amount = _claimable_last(addr, delta, sumMiningPer, sumMiningPerOf[addr]); if(delta != amount) bufReward = bufReward.add(delta).sub(amount); if(delta > 0) sumMiningPer = sumMiningPer.add(delta.mul(1 ether).div(totalSupply)); if(sumMiningPerOf[addr] != sumMiningPer) sumMiningPerOf[addr] = sumMiningPer; lasttime = now; _checkpoint(addr, amount); _checkpoint_rewards(addr, _claim_rewards); } function user_checkpoint(address addr) virtual override external returns (bool) { _checkpoint(addr, config[_claim_rewards_] == 0 ? false : true); return true; } function integrate_checkpoint() override external view returns (uint) { return lasttime; } function reward_integral() virtual override external view returns (uint) { return reward_integral_[rewarded_token]; } function reward_integral_for(address addr) virtual override external view returns (uint) { return reward_integral_for_[addr][rewarded_token]; } function rewards_for(address addr) virtual override external view returns (uint) { return rewards_for_[addr][rewarded_token]; } function claimed_rewards_for(address addr) virtual override external view returns (uint) { return claimed_rewards_for_[addr][rewarded_token]; } } contra uge is SExactGauge { address[] public rewards; //mapping(address => mapping(address =>uint)) internal sumRewardPerOf_; // recipient => rewarded_token => can sumRewardPerOf // obsolete, instead of reward_integral_ //mapping(address => uint) internal sumRewardPer_; // rewarded_token => can sumRewardPerOf // obsolete, instead of reward_integral_for_ function initialize(address governor, address _minter, address _lp_token, address _nestGauge, address[] memory _moreRewards) public initializer { super.initialize(governor, _minter, _lp_token); reward_contract = _nestGauge; rewarded_token = LiquidityGauge(_nestGauge).crv_token(); rewards = _moreRewards; rewards.push(rewarded_token); address rewarded_token2 = LiquidityGauge(_nestGauge).rewarded_token(); if(rewarded_token2 != address(0)) rewards.push(rewarded_token2); LiquidityGauge(_nestGauge).integrate_checkpoint(); // just check for(uint i=0; i<_moreRewards.length; i++) IERC20(_moreRewards[i]).totalSupply(); // just check } function _deposit(address from, uint amount) virtual override internal { super._deposit(from, amount); // lp_token.safeTransferFrom(from, address(this), amount); lp_token.safeApprove(reward_contract, amount); LiquidityGauge(reward_contract).deposit(amount); } function _withdraw(address to, uint amount) virtual override internal { LiquidityGauge(reward_contract).withdraw(amount); super._withdraw(to, amount); // lp_token.safeTransfer(to, amount); } function claim_rewards(address to) virtual override public { if(span == 0 || totalSupply == 0) return; _checkpoint_rewards(to, true); for(uint i=0; i<rewards.length; i++) { uint amount = rewards_for_[to][rewards[i]].sub(claimed_rewards_for_[to][rewards[i]]); if(amount > 0) { rewards[i].safeTransfer(to, amount); claimed_rewards_for_[to][rewards[i]] = rewards_for_[to][rewards[i]]; } } } function _checkpoint_rewards(address addr, bool _claim_rewards) virtual override internal { if(span == 0 || totalSupply == 0) return; uint[] memory drs = new uint[](rewards.length); if(_claim_rewards) { for(uint i=0; i<drs.length; i++) drs[i] = IERC20(rewards[i]).balanceOf(address(this)); Minter(LiquidityGauge(reward_contract).minter()).mint(reward_contract); LiquidityGauge(reward_contract).claim_rewards(); for(uint i=0; i<drs.length; i++) drs[i] = IERC20(rewards[i]).balanceOf(address(this)).sub(drs[i]); } for(uint i=0; i<drs.length; i++) { uint amount = _claimable_last(addr, drs[i], reward_integral_[rewards[i]], reward_integral_for_[addr][rewards[i]]); if(amount > 0) rewards_for_[addr][rewards[i]] = rewards_for_[addr][rewards[i]].add(amount); if(drs[i] > 0) reward_integral_[rewards[i]] = reward_integral_[rewards[i]].add(drs[i].mul(1 ether).div(totalSupply)); if(reward_integral_for_[addr][rewards[i]] != reward_integral_[rewards[i]]) reward_integral_for_[addr][rewards[i]] = reward_integral_[rewards[i]]; } } function claimable_reward(address addr) virtual override public view returns (uint r) { //uint delta = LiquidityGauge(reward_contract).claimable_tokens(address(this)); // Error: Mutable call in static context uint delta = LiquidityGauge(reward_contract).integrate_fraction(address(this)).sub(Minter(LiquidityGauge(reward_contract).minter()).minted(address(this), reward_contract)); r = _claimable_last(addr, delta, reward_integral_[rewarded_token], reward_integral_for_[addr][rewarded_token]); r = r.add(rewards_for_[addr][rewarded_token].sub(claimed_rewards_for_[addr][rewarded_token])); } function claimable_reward2(address addr) virtual public view returns (uint r) { uint delta = LiquidityGauge(reward_contract).claimable_reward(address(this)).sub(LiquidityGauge(reward_contract).claimed_rewards_for(address(this))); address reward2 = LiquidityGauge(reward_contract).rewarded_token(); r = _claimable_last(addr, delta, reward_integral_[reward2], reward_integral_for_[addr][reward2]); r = r.add(rewards_for_[addr][reward2].sub(claimed_rewards_for_[addr][reward2])); } function claimable_reward(address addr, address reward) virtual public view returns (uint r) { r = _claimable_last(addr, 0, reward_integral_[reward], reward_integral_for_[addr][reward]); r = r.add(rewards_for_[addr][reward].sub(claimed_rewards_for_[addr][reward])); } function claimed_rewards_for2(address addr) virtual public view returns (uint) { return claimed_rewards_for_[addr][LiquidityGauge(reward_contract).rewarded_token()]; } function rewards_for2(address addr) virtual public view returns (uint) { return rewards_for_[addr][LiquidityGauge(reward_contract).rewarded_token()]; } } contrac is Minter, Configurable { using SafeMath for uint; using Address for address payable; using TransferHelper for address; bytes32 internal constant _allowContract_ = 'allowContract'; bytes32 internal constant _allowlist_ = 'allowlist'; bytes32 internal constant _blocklist_ = 'blocklist'; address override public token; address override public controller; mapping(address => mapping(address => uint)) override public minted; // user => reward_contract => value mapping(address => mapping(address => bool)) override public allowed_to_mint_for; // minter => user => can mint? mapping(address => uint) public quotas; // reward_contract => quota; function initialize(address governor, address token_) public initializer { super.initialize(governor); token = token_; } function setGaugeQuota(address gauge, uint quota) public governance { quotas[gauge] = quota; } function mint(address gauge) virtual override public { mint_for(gauge, msg.sender); } function mint_many(address[8] calldata gauges) virtual override external { for(uint i=0; i<gauges.length; i++) mint(gauges[i]); } function mint_many(address[] calldata gauges) virtual external { for(uint i=0; i<gauges.length; i++) mint(gauges[i]); } function mint_for(address gauge, address _for) virtual override public { require(_for == msg.sender || allowed_to_mint_for[msg.sender][_for], 'Not approved'); require(quotas[gauge] > 0, 'No quota'); require(getConfig(_blocklist_, msg.sender) == 0, 'In blocklist'); bool isContract = msg.sender.isContract(); require(!isContract || config[_allowContract_] != 0 || getConfig(_allowlist_, msg.sender) != 0, 'No allowContract'); LiquidityGauge(gauge).user_checkpoint(_for); uint total_mint = LiquidityGauge(gauge).integrate_fraction(_for); uint to_mint = total_mint.sub(minted[_for][gauge]); if(to_mint != 0) { quotas[gauge] = quotas[gauge].sub(to_mint); token.safeTransfer(_for, to_mint); minted[_for][gauge] = total_mint; emit Minted(_for, gauge, total_mint); } } function toggle_approve_mint(address minting_user) virtual override external { allowed_to_mint_for[minting_user][msg.sender] = !allowed_to_mint_for[minting_user][msg.sender]; } } /* // he abstract contract Context { function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } function sqrt(uint x)public pure returns(uint y) { uint z = (x + 1) / 2; y = x; while (z < y) { y = z; z = (x / z + z) / 2; } } } library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // This method relies in extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. uint256 size; // solhint-disable-next-line no-inline-assembly assembly { size := extcodesize(account) } return size > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain`call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return _functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); return _functionCallWithValue(target, data, value, errorMessage); } function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) { require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: weiValue }(data); if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } contract ERC20 is Context, IERC20 { using SafeMath for uint256; using Address for address; mapping (address => uint256) public _balances; mapping (address => mapping (address => uint256)) internal _allowances; uint256 public _totalSupply; string internal _name; string internal _symbol; uint8 internal _decimals; /** * @dev Sets the values for {name} and {symbol}, initializes {decimals} with * a default value of 18. * * To select a different value for {decimals}, use {_setupDecimals}. * * All three of these values are immutable: they can only be set once during * construction. */ constructor (string memory name, string memory symbol) public { _name = name; _symbol = symbol; _decimals = 18; } /** * @dev Returns the name of the token. */ function name() public view returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5,05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is * called. * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view returns (uint8) { return _decimals; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view virtual override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view virtual override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `recipient` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address recipient, uint256 amount) public virtual override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { _approve(_msgSender(), spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}; * * Requirements: * - `sender` and `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. * - the caller must have allowance for ``sender``'s tokens of at least * `amount`. */ function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) { _transfer(sender, recipient, amount); _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance")); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue)); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero")); return true; } /** * @dev Moves tokens `amount` from `sender` to `recipient`. * * This is internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `sender` cannot be the zero address. * - `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. */ function _transfer(address sender, address recipient, uint256 amount) internal virtual { require(sender != address(0), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(sender, recipient, amount); _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance"); _balances[recipient] = _balances[recipient].add(amount); emit Transfer(sender, recipient, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements * * - `to` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply = _totalSupply.add(amount); _balances[account] = _balances[account].add(amount); emit Transfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance"); _totalSupply = _totalSupply.sub(amount); emit Transfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens. * * This is internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve(address owner, address spender, uint256 amount) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Sets {decimals} to a value other than the default one of 18. * * WARNING: This function should only be called from the constructor. Most * applications that interact with token contracts will not expect * {decimals} to ever change, and may work incorrectly if it does. */ function _setupDecimals(uint8 decimals_) internal { _decimals = decimals_; } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be to transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { } } contract SfgToken is ERC20 { constructor(address SfgFarm) ERC20("Stable Finance Governance Token", "SFG") public { uint8 decimals = 18; _setupDecimals(decimals); _mint(SfgFarm, 21000000 * 10 ** uint256(decimals)); // 100%, 21000000 } } contract SfyToken is ERC20 { constructor(address SfyFarm) ERC20("Stable Finance Yield Token", "SFY") public { uint8 decimals = 18; _setupDecimals(decimals); _mint(SfyFarm, 21000000 * 10 ** uint256(decimals)); // 100%, 21000000 } } library TransferHelper { function safeApprove(address token, address to, uint value) internal { // bytes4(keccak256(bytes('approve(address,uint256)'))); (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x095ea7b3, to, value)); require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: APPROVE_FAILED'); } function safeTransfer(address token, address to, uint value) internal { // bytes4(keccak256(bytes('transfer(address,uint256)'))); (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0xa9059cbb, to, value)); require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: TRANSFER_FAILED'); } function safeTransferFrom(address token, address from, address to, uint value) internal { // bytes4(keccak256(bytes('transferFrom(address,address,uint256)'))); (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x23b872dd, from, to, value)); require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: TRANSFER_FROM_FAILED'); } function safeTransferETH(address to, uint value) internal { (bool success,) = to.call{value:value}(new bytes(0)); require(success, 'TransferHelper: ETH_TRANSFER_FAILED'); } } contract DForceGauge is SExactGauge { function initialize(address governor, address _minter, address _lp_token, address rewardPool) public initializer { super.initialize(governor, _minter, _lp_token); reward_contract = rewardPool; rewarded_token = RewardPool(rewardPool).df(); } function _deposit(address from, uint amount) virtual override internal { super._deposit(from, amount); // lp_token.safeTransferFrom(from, address(this), amount); lp_token.safeApprove(reward_contract, amount); RewardPool(reward_contract).stake(amount); } function _withdraw(address to, uint amount) virtual override internal { RewardPool(reward_contract).withdraw(amount); super._withdraw(to, amount); // lp_token.safeTransfer(to, amount); } function claim_rewards(address to) virtual override public { if(span == 0 || totalSupply == 0) return; _checkpoint_rewards(to, true); uint amount = rewards_for_[to][rewarded_token].sub(claimed_rewards_for_[to][rewarded_token]); if(amount > 0) { rewarded_token.safeTransfer(to, amount); claimed_rewards_for_[to][rewarded_token] = rewards_for_[to][rewarded_token]; } } function _checkpoint_rewards(address addr, bool _claim_rewards) virtual override internal { if(span == 0 || totalSupply == 0) return; uint dr = 0; if(_claim_rewards) { dr = IERC20(rewarded_token).balanceOf(address(this)); RewardPool(reward_contract).getReward(); dr = IERC20(rewarded_token).balanceOf(address(this)).sub(dr); } uint amount = _claimable_last(addr, dr, reward_integral_[rewarded_token], reward_integral_for_[addr][rewarded_token]); if(amount > 0) rewards_for_[addr][rewarded_token] = rewards_for_[addr][rewarded_token].add(amount); if(dr > 0) reward_integral_[rewarded_token] = reward_integral_[rewarded_token].add(dr.mul(1 ether).div(totalSupply)); if(reward_integral_for_[addr][rewarded_token] != reward_integral_[rewarded_token]) reward_integral_for_[addr][rewarded_token] = reward_integral_[rewarded_token]; } function claimable_reward(address addr) virtual override public view returns (uint r) { uint delta = RewardPool(reward_contract).earned(address(this)); r = _claimable_last(addr, delta, reward_integral_[rewarded_token], reward_integral_for_[addr][rewarded_token]); r = r.add(rewards_for_[addr][rewarded_token].sub(claimed_rewards_for_[addr][rewarded_token])); } }

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{"success": true, "error": null, "results": {"detectors": [{"check": "unused-return", "impact": "Medium", "confidence": "Medium"}, {"check": "divide-before-multiply", "impact": "Medium", "confidence": "Medium"}, {"check": "incorrect-equality", "impact": "Medium", "confidence": "High"}, {"check": "reentrancy-no-eth", "impact": "Medium", "confidence": "Medium"}]}}

0x87cbbc0f5bd3005765f5e9ac98f83df73fca99f0

pragma solidity 0.6.8; abstract contract Context { function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } library EnumerableSet { // To implement this library for multiple types with as little code // repetition as possible, we write it in terms of a generic Set type with // bytes32 values. // The Set implementation uses private functions, and user-facing // implementations (such as AddressSet) are just wrappers around the // underlying Set. // This means that we can only create new EnumerableSets for types that fit // in bytes32. struct Set { // Storage of set values bytes32[] _values; // Position of the value in the `values` array, plus 1 because index 0 // means a value is not in the set. mapping (bytes32 => uint256) _indexes; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function _add(Set storage set, bytes32 value) private returns (bool) { if (!_contains(set, value)) { set._values.push(value); // The value is stored at length-1, but we add 1 to all indexes // and use 0 as a sentinel value set._indexes[value] = set._values.length; return true; } else { return false; } } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function _remove(Set storage set, bytes32 value) private returns (bool) { // We read and store the value's index to prevent multiple reads from the same storage slot uint256 valueIndex = set._indexes[value]; if (valueIndex != 0) { // Equivalent to contains(set, value) // To delete an element from the _values array in O(1), we swap the element to delete with the last one in // the array, and then remove the last element (sometimes called as 'swap and pop'). // This modifies the order of the array, as noted in {at}. uint256 toDeleteIndex = valueIndex - 1; uint256 lastIndex = set._values.length - 1; // When the value to delete is the last one, the swap operation is unnecessary. However, since this occurs // so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement. bytes32 lastvalue = set._values[lastIndex]; // Move the last value to the index where the value to delete is set._values[toDeleteIndex] = lastvalue; // Update the index for the moved value set._indexes[lastvalue] = toDeleteIndex + 1; // All indexes are 1-based // Delete the slot where the moved value was stored set._values.pop(); // Delete the index for the deleted slot delete set._indexes[value]; return true; } else { return false; } } /** * @dev Returns true if the value is in the set. O(1). */ function _contains(Set storage set, bytes32 value) private view returns (bool) { return set._indexes[value] != 0; } /** * @dev Returns the number of values on the set. O(1). */ function _length(Set storage set) private view returns (uint256) { return set._values.length; } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function _at(Set storage set, uint256 index) private view returns (bytes32) { require(set._values.length > index, "EnumerableSet: index out of bounds"); return set._values[index]; } // AddressSet struct AddressSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(AddressSet storage set, address value) internal returns (bool) { return _add(set._inner, bytes32(uint256(value))); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(AddressSet storage set, address value) internal returns (bool) { return _remove(set._inner, bytes32(uint256(value))); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(AddressSet storage set, address value) internal view returns (bool) { return _contains(set._inner, bytes32(uint256(value))); } /** * @dev Returns the number of values in the set. O(1). */ function length(AddressSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(AddressSet storage set, uint256 index) internal view returns (address) { return address(uint256(_at(set._inner, index))); } // UintSet struct UintSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(UintSet storage set, uint256 value) internal returns (bool) { return _add(set._inner, bytes32(value)); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(UintSet storage set, uint256 value) internal returns (bool) { return _remove(set._inner, bytes32(value)); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(UintSet storage set, uint256 value) internal view returns (bool) { return _contains(set._inner, bytes32(value)); } /** * @dev Returns the number of values on the set. O(1). */ function length(UintSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(UintSet storage set, uint256 index) internal view returns (uint256) { return uint256(_at(set._inner, index)); } } interface ICryptoPunksMarket { struct Offer { bool isForSale; uint256 punkIndex; address seller; uint256 minValue; address onlySellTo; } struct Bid { bool hasBid; uint256 punkIndex; address bidder; uint256 value; } event Assign(address indexed to, uint256 punkIndex); event Transfer(address indexed from, address indexed to, uint256 value); event PunkTransfer( address indexed from, address indexed to, uint256 punkIndex ); event PunkOffered( uint256 indexed punkIndex, uint256 minValue, address indexed toAddress ); event PunkBidEntered( uint256 indexed punkIndex, uint256 value, address indexed fromAddress ); event PunkBidWithdrawn( uint256 indexed punkIndex, uint256 value, address indexed fromAddress ); event PunkBought( uint256 indexed punkIndex, uint256 value, address indexed fromAddress, address indexed toAddress ); event PunkNoLongerForSale(uint256 indexed punkIndex); function setInitialOwner(address to, uint256 punkIndex) external; function setInitialOwners( address[] calldata addresses, uint256[] calldata indices ) external; function allInitialOwnersAssigned() external; function getPunk(uint256 punkIndex) external; function transferPunk(address to, uint256 punkIndex) external; function punkNoLongerForSale(uint256 punkIndex) external; function offerPunkForSale(uint256 punkIndex, uint256 minSalePriceInWei) external; function offerPunkForSaleToAddress( uint256 punkIndex, uint256 minSalePriceInWei, address toAddress ) external; function buyPunk(uint256 punkIndex) external; function withdraw() external; function enterBidForPunk(uint256 punkIndex) external; function acceptBidForPunk(uint256 punkIndex, uint256 minPrice) external; function withdrawBidForPunk(uint256 punkIndex) external; function punkIndexToAddress(uint256 punkIndex) external returns (address); } interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } contract Ownable is Context { address private _owner; event OwnershipTransferred( address indexed previousOwner, address indexed newOwner ); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor() internal { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), msgSender); } /** * @dev Returns the address of the current owner. */ function owner() public view returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(_owner == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { emit OwnershipTransferred(_owner, address(0)); _owner = address(0); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require( newOwner != address(0), "Ownable: new owner is the zero address" ); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } } library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } contract Timelocked is Ownable { using SafeMath for uint256; uint256 releaseTime = 0; event Locked(); event UnlockInitiated(uint256 releaseTime); function initiateUnlock() public onlyOwner { releaseTime = now.add(60 * 60 * 24 * 10); emit UnlockInitiated(releaseTime); } function Lock() public onlyOwner { releaseTime = 0; emit Locked(); } modifier whenNotLocked { require(releaseTime != 0 && now > releaseTime, "Contract is locked"); _; } } contract Pausable is Timelocked { bool private isPaused = false; event Paused(); event Unpaused(); function pause() public onlyOwner whenNotLocked { isPaused = true; } function unpause() public onlyOwner whenNotLocked { isPaused = false; } modifier whenNotPaused { require(!isPaused, "Contract is paused"); _; } } contract PunkFund is Pausable { using SafeMath for uint256; using EnumerableSet for EnumerableSet.UintSet; ICryptoPunksMarket private cpm; IERC20 private pt; mapping(uint256 => address) private whoStaged; EnumerableSet.UintSet private cryptoPunksDeposited; uint256 private randNonce = 0; event CryptoPunkStaged(uint256 punkId, address indexed from); event CryptoPunkDeposited(uint256 punkId, address indexed from); event CryptoPunkRedeemed(uint256 punkId, address indexed to); constructor(address cryptoPunksAddress, address punkTokenAddress) public { cpm = ICryptoPunksMarket(cryptoPunksAddress); pt = IERC20(punkTokenAddress); } function getWhoStaged(uint256 cryptoPunkId) public view returns (address) { return whoStaged[cryptoPunkId]; } function getCryptoPunkAtIndex(uint256 index) public view returns (uint256) { return cryptoPunksDeposited.at(index); } function getNumCryptoPunksDeposited() public view returns (uint256) { return cryptoPunksDeposited.length(); } function genPseudoRand(uint256 modulus) internal returns (uint256) { randNonce = randNonce.add(1); return uint256(keccak256(abi.encodePacked(now, msg.sender, randNonce))) % modulus; } function isCryptoPunkDeposited(uint256 punkId) public view returns (bool) { uint256 numCryptoPunks = cryptoPunksDeposited.length(); for (uint256 i = 0; i < numCryptoPunks; i++) { uint256 cryptoPunkId = cryptoPunksDeposited.at(i); if (cryptoPunkId == punkId) { return true; } } return false; } function stageCryptoPunk(uint256 punkId) public whenNotPaused { require(cpm.punkIndexToAddress(punkId) == msg.sender); whoStaged[punkId] = msg.sender; emit CryptoPunkStaged(punkId, msg.sender); } function withdrawPunkToken(uint256 punkId) public whenNotPaused { require(whoStaged[punkId] == msg.sender); require(cpm.punkIndexToAddress(punkId) == address(this)); cryptoPunksDeposited.add(punkId); emit CryptoPunkDeposited(punkId, msg.sender); pt.transfer(msg.sender, 10**18); } function redeemCryptoPunk() public whenNotPaused { uint256 cpLength = cryptoPunksDeposited.length(); uint256 randomIndex = genPseudoRand(cpLength); uint256 selectedPunk = cryptoPunksDeposited.at(randomIndex); require(pt.transferFrom(msg.sender, address(this), 10**18)); cryptoPunksDeposited.remove(selectedPunk); cpm.transferPunk(msg.sender, selectedPunk); emit CryptoPunkRedeemed(selectedPunk, msg.sender); } function migrate(address to) public onlyOwner whenNotLocked { uint256 punkBalance = pt.balanceOf(address(this)); pt.transfer(to, punkBalance); uint256 numCryptoPunks = cryptoPunksDeposited.length(); for (uint256 i = 0; i < numCryptoPunks; i++) { uint256 cryptoPunkId = cryptoPunksDeposited.at(i); cpm.transferPunk(to, cryptoPunkId); } } function stageRetroactively(uint256 punkId, address prevHolder) public onlyOwner { require(cpm.punkIndexToAddress(punkId) == address(this)); require(!isCryptoPunkDeposited(punkId)); whoStaged[punkId] = prevHolder; emit CryptoPunkStaged(punkId, prevHolder); } function redeemRetroactively(address newHolder) public onlyOwner { uint256 circulatingPunkSupply = pt.totalSupply() - pt.balanceOf(address(this)); uint256 expectedCryptoPunksDeposited = circulatingPunkSupply.div( 10 ^ 18 ); if (cryptoPunksDeposited.length() > expectedCryptoPunksDeposited) { uint256 randomIndex = genPseudoRand(cryptoPunksDeposited.length()); uint256 selectedPunk = cryptoPunksDeposited.at(randomIndex); cryptoPunksDeposited.remove(selectedPunk); cpm.transferPunk(newHolder, selectedPunk); emit CryptoPunkRedeemed(selectedPunk, newHolder); } } }

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{"success": true, "error": null, "results": {"detectors": [{"check": "weak-prng", "impact": "High", "confidence": "Medium"}, {"check": "unused-return", "impact": "Medium", "confidence": "Medium"}, {"check": "unchecked-transfer", "impact": "High", "confidence": "Medium"}]}}

0x89505d2a27b7e8ac56252081d721ecd525e4241e

pragma solidity 0.6.12; abstract contract Context { function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } abstract contract AccessControl is Context { using EnumerableSet for EnumerableSet.AddressSet; using Address for address; struct RoleData { EnumerableSet.AddressSet members; bytes32 adminRole; } mapping (bytes32 => RoleData) private _roles; bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00; /** * @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole` * * `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite * {RoleAdminChanged} not being emitted signaling this. * * _Available since v3.1._ */ event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole); /** * @dev Emitted when `account` is granted `role`. * * `sender` is the account that originated the contract call, an admin role * bearer except when using {_setupRole}. */ event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender); /** * @dev Emitted when `account` is revoked `role`. * * `sender` is the account that originated the contract call: * - if using `revokeRole`, it is the admin role bearer * - if using `renounceRole`, it is the role bearer (i.e. `account`) */ event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender); /** * @dev Returns `true` if `account` has been granted `role`. */ function hasRole(bytes32 role, address account) public view returns (bool) { return _roles[role].members.contains(account); } /** * @dev Returns the number of accounts that have `role`. Can be used * together with {getRoleMember} to enumerate all bearers of a role. */ function getRoleMemberCount(bytes32 role) public view returns (uint256) { return _roles[role].members.length(); } /** * @dev Returns one of the accounts that have `role`. `index` must be a * value between 0 and {getRoleMemberCount}, non-inclusive. * * Role bearers are not sorted in any particular way, and their ordering may * change at any point. * * WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure * you perform all queries on the same block. See the following * https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post] * for more information. */ function getRoleMember(bytes32 role, uint256 index) public view returns (address) { return _roles[role].members.at(index); } /** * @dev Returns the admin role that controls `role`. See {grantRole} and * {revokeRole}. * * To change a role's admin, use {_setRoleAdmin}. */ function getRoleAdmin(bytes32 role) public view returns (bytes32) { return _roles[role].adminRole; } /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function grantRole(bytes32 role, address account) public virtual { require(hasRole(_roles[role].adminRole, _msgSender()), "AccessControl: sender must be an admin to grant"); _grantRole(role, account); } /** * @dev Revokes `role` from `account`. * * If `account` had been granted `role`, emits a {RoleRevoked} event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function revokeRole(bytes32 role, address account) public virtual { require(hasRole(_roles[role].adminRole, _msgSender()), "AccessControl: sender must be an admin to revoke"); _revokeRole(role, account); } /** * @dev Revokes `role` from the calling account. * * Roles are often managed via {grantRole} and {revokeRole}: this function's * purpose is to provide a mechanism for accounts to lose their privileges * if they are compromised (such as when a trusted device is misplaced). * * If the calling account had been granted `role`, emits a {RoleRevoked} * event. * * Requirements: * * - the caller must be `account`. */ function renounceRole(bytes32 role, address account) public virtual { require(account == _msgSender(), "AccessControl: can only renounce roles for self"); _revokeRole(role, account); } /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. Note that unlike {grantRole}, this function doesn't perform any * checks on the calling account. * * [WARNING] * ==== * This function should only be called from the constructor when setting * up the initial roles for the system. * * Using this function in any other way is effectively circumventing the admin * system imposed by {AccessControl}. * ==== */ function _setupRole(bytes32 role, address account) internal virtual { _grantRole(role, account); } /** * @dev Sets `adminRole` as ``role``'s admin role. * * Emits a {RoleAdminChanged} event. */ function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual { emit RoleAdminChanged(role, _roles[role].adminRole, adminRole); _roles[role].adminRole = adminRole; } function _grantRole(bytes32 role, address account) private { if (_roles[role].members.add(account)) { emit RoleGranted(role, account, _msgSender()); } } function _revokeRole(bytes32 role, address account) private { if (_roles[role].members.remove(account)) { emit RoleRevoked(role, account, _msgSender()); } } } interface IERC165 { /** * @dev Returns true if this contract implements the interface defined by * `interfaceId`. See the corresponding * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section] * to learn more about how these ids are created. * * This function call must use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool); } library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } interface IERC721 is IERC165 { /** * @dev Emitted when `tokenId` token is transferred from `from` to `to`. */ event Transfer(address indexed from, address indexed to, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token. */ event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets. */ event ApprovalForAll(address indexed owner, address indexed operator, bool approved); /** * @dev Returns the number of tokens in ``owner``'s account. */ function balanceOf(address owner) external view returns (uint256 balance); /** * @dev Returns the owner of the `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function ownerOf(uint256 tokenId) external view returns (address owner); /** * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients * are aware of the ERC721 protocol to prevent tokens from being forever locked. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom(address from, address to, uint256 tokenId) external; /** * @dev Transfers `tokenId` token from `from` to `to`. * * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * * Emits a {Transfer} event. */ function transferFrom(address from, address to, uint256 tokenId) external; /** * @dev Gives permission to `to` to transfer `tokenId` token to another account. * The approval is cleared when the token is transferred. * * Only a single account can be approved at a time, so approving the zero address clears previous approvals. * * Requirements: * * - The caller must own the token or be an approved operator. * - `tokenId` must exist. * * Emits an {Approval} event. */ function approve(address to, uint256 tokenId) external; /** * @dev Returns the account approved for `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function getApproved(uint256 tokenId) external view returns (address operator); /** * @dev Approve or remove `operator` as an operator for the caller. * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller. * * Requirements: * * - The `operator` cannot be the caller. * * Emits an {ApprovalForAll} event. */ function setApprovalForAll(address operator, bool _approved) external; /** * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`. * * See {setApprovalForAll} */ function isApprovedForAll(address owner, address operator) external view returns (bool); /** * @dev Safely transfers `tokenId` token from `from` to `to`. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom(address from, address to, uint256 tokenId, bytes calldata data) external; } interface IERC721Enumerable is IERC721 { /** * @dev Returns the total amount of tokens stored by the contract. */ function totalSupply() external view returns (uint256); /** * @dev Returns a token ID owned by `owner` at a given `index` of its token list. * Use along with {balanceOf} to enumerate all of ``owner``'s tokens. */ function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256 tokenId); /** * @dev Returns a token ID at a given `index` of all the tokens stored by the contract. * Use along with {totalSupply} to enumerate all tokens. */ function tokenByIndex(uint256 index) external view returns (uint256); } interface IERC721Metadata is IERC721 { /** * @dev Returns the token collection name. */ function name() external view returns (string memory); /** * @dev Returns the token collection symbol. */ function symbol() external view returns (string memory); /** * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token. */ function tokenURI(uint256 tokenId) external view returns (string memory); } interface IERC721Receiver { /** * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom} * by `operator` from `from`, this function is called. * * It must return its Solidity selector to confirm the token transfer. * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted. * * The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`. */ function onERC721Received(address operator, address from, uint256 tokenId, bytes calldata data) external returns (bytes4); } library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // This method relies in extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. uint256 size; // solhint-disable-next-line no-inline-assembly assembly { size := extcodesize(account) } return size > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain`call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return _functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); return _functionCallWithValue(target, data, value, errorMessage); } function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) { require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: weiValue }(data); if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } library EnumerableMap { // To implement this library for multiple types with as little code // repetition as possible, we write it in terms of a generic Map type with // bytes32 keys and values. // The Map implementation uses private functions, and user-facing // implementations (such as Uint256ToAddressMap) are just wrappers around // the underlying Map. // This means that we can only create new EnumerableMaps for types that fit // in bytes32. struct MapEntry { bytes32 _key; bytes32 _value; } struct Map { // Storage of map keys and values MapEntry[] _entries; // Position of the entry defined by a key in the `entries` array, plus 1 // because index 0 means a key is not in the map. mapping (bytes32 => uint256) _indexes; } /** * @dev Adds a key-value pair to a map, or updates the value for an existing * key. O(1). * * Returns true if the key was added to the map, that is if it was not * already present. */ function _set(Map storage map, bytes32 key, bytes32 value) private returns (bool) { // We read and store the key's index to prevent multiple reads from the same storage slot uint256 keyIndex = map._indexes[key]; if (keyIndex == 0) { // Equivalent to !contains(map, key) map._entries.push(MapEntry({ _key: key, _value: value })); // The entry is stored at length-1, but we add 1 to all indexes // and use 0 as a sentinel value map._indexes[key] = map._entries.length; return true; } else { map._entries[keyIndex - 1]._value = value; return false; } } /** * @dev Removes a key-value pair from a map. O(1). * * Returns true if the key was removed from the map, that is if it was present. */ function _remove(Map storage map, bytes32 key) private returns (bool) { // We read and store the key's index to prevent multiple reads from the same storage slot uint256 keyIndex = map._indexes[key]; if (keyIndex != 0) { // Equivalent to contains(map, key) // To delete a key-value pair from the _entries array in O(1), we swap the entry to delete with the last one // in the array, and then remove the last entry (sometimes called as 'swap and pop'). // This modifies the order of the array, as noted in {at}. uint256 toDeleteIndex = keyIndex - 1; uint256 lastIndex = map._entries.length - 1; // When the entry to delete is the last one, the swap operation is unnecessary. However, since this occurs // so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement. MapEntry storage lastEntry = map._entries[lastIndex]; // Move the last entry to the index where the entry to delete is map._entries[toDeleteIndex] = lastEntry; // Update the index for the moved entry map._indexes[lastEntry._key] = toDeleteIndex + 1; // All indexes are 1-based // Delete the slot where the moved entry was stored map._entries.pop(); // Delete the index for the deleted slot delete map._indexes[key]; return true; } else { return false; } } /** * @dev Returns true if the key is in the map. O(1). */ function _contains(Map storage map, bytes32 key) private view returns (bool) { return map._indexes[key] != 0; } /** * @dev Returns the number of key-value pairs in the map. O(1). */ function _length(Map storage map) private view returns (uint256) { return map._entries.length; } /** * @dev Returns the key-value pair stored at position `index` in the map. O(1). * * Note that there are no guarantees on the ordering of entries inside the * array, and it may change when more entries are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function _at(Map storage map, uint256 index) private view returns (bytes32, bytes32) { require(map._entries.length > index, "EnumerableMap: index out of bounds"); MapEntry storage entry = map._entries[index]; return (entry._key, entry._value); } /** * @dev Returns the value associated with `key`. O(1). * * Requirements: * * - `key` must be in the map. */ function _get(Map storage map, bytes32 key) private view returns (bytes32) { return _get(map, key, "EnumerableMap: nonexistent key"); } /** * @dev Same as {_get}, with a custom error message when `key` is not in the map. */ function _get(Map storage map, bytes32 key, string memory errorMessage) private view returns (bytes32) { uint256 keyIndex = map._indexes[key]; require(keyIndex != 0, errorMessage); // Equivalent to contains(map, key) return map._entries[keyIndex - 1]._value; // All indexes are 1-based } // UintToAddressMap struct UintToAddressMap { Map _inner; } /** * @dev Adds a key-value pair to a map, or updates the value for an existing * key. O(1). * * Returns true if the key was added to the map, that is if it was not * already present. */ function set(UintToAddressMap storage map, uint256 key, address value) internal returns (bool) { return _set(map._inner, bytes32(key), bytes32(uint256(value))); } /** * @dev Removes a value from a set. O(1). * * Returns true if the key was removed from the map, that is if it was present. */ function remove(UintToAddressMap storage map, uint256 key) internal returns (bool) { return _remove(map._inner, bytes32(key)); } /** * @dev Returns true if the key is in the map. O(1). */ function contains(UintToAddressMap storage map, uint256 key) internal view returns (bool) { return _contains(map._inner, bytes32(key)); } /** * @dev Returns the number of elements in the map. O(1). */ function length(UintToAddressMap storage map) internal view returns (uint256) { return _length(map._inner); } /** * @dev Returns the element stored at position `index` in the set. O(1). * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(UintToAddressMap storage map, uint256 index) internal view returns (uint256, address) { (bytes32 key, bytes32 value) = _at(map._inner, index); return (uint256(key), address(uint256(value))); } /** * @dev Returns the value associated with `key`. O(1). * * Requirements: * * - `key` must be in the map. */ function get(UintToAddressMap storage map, uint256 key) internal view returns (address) { return address(uint256(_get(map._inner, bytes32(key)))); } /** * @dev Same as {get}, with a custom error message when `key` is not in the map. */ function get(UintToAddressMap storage map, uint256 key, string memory errorMessage) internal view returns (address) { return address(uint256(_get(map._inner, bytes32(key), errorMessage))); } } library EnumerableSet { // To implement this library for multiple types with as little code // repetition as possible, we write it in terms of a generic Set type with // bytes32 values. // The Set implementation uses private functions, and user-facing // implementations (such as AddressSet) are just wrappers around the // underlying Set. // This means that we can only create new EnumerableSets for types that fit // in bytes32. struct Set { // Storage of set values bytes32[] _values; // Position of the value in the `values` array, plus 1 because index 0 // means a value is not in the set. mapping (bytes32 => uint256) _indexes; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function _add(Set storage set, bytes32 value) private returns (bool) { if (!_contains(set, value)) { set._values.push(value); // The value is stored at length-1, but we add 1 to all indexes // and use 0 as a sentinel value set._indexes[value] = set._values.length; return true; } else { return false; } } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function _remove(Set storage set, bytes32 value) private returns (bool) { // We read and store the value's index to prevent multiple reads from the same storage slot uint256 valueIndex = set._indexes[value]; if (valueIndex != 0) { // Equivalent to contains(set, value) // To delete an element from the _values array in O(1), we swap the element to delete with the last one in // the array, and then remove the last element (sometimes called as 'swap and pop'). // This modifies the order of the array, as noted in {at}. uint256 toDeleteIndex = valueIndex - 1; uint256 lastIndex = set._values.length - 1; // When the value to delete is the last one, the swap operation is unnecessary. However, since this occurs // so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement. bytes32 lastvalue = set._values[lastIndex]; // Move the last value to the index where the value to delete is set._values[toDeleteIndex] = lastvalue; // Update the index for the moved value set._indexes[lastvalue] = toDeleteIndex + 1; // All indexes are 1-based // Delete the slot where the moved value was stored set._values.pop(); // Delete the index for the deleted slot delete set._indexes[value]; return true; } else { return false; } } /** * @dev Returns true if the value is in the set. O(1). */ function _contains(Set storage set, bytes32 value) private view returns (bool) { return set._indexes[value] != 0; } /** * @dev Returns the number of values on the set. O(1). */ function _length(Set storage set) private view returns (uint256) { return set._values.length; } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function _at(Set storage set, uint256 index) private view returns (bytes32) { require(set._values.length > index, "EnumerableSet: index out of bounds"); return set._values[index]; } // AddressSet struct AddressSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(AddressSet storage set, address value) internal returns (bool) { return _add(set._inner, bytes32(uint256(value))); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(AddressSet storage set, address value) internal returns (bool) { return _remove(set._inner, bytes32(uint256(value))); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(AddressSet storage set, address value) internal view returns (bool) { return _contains(set._inner, bytes32(uint256(value))); } /** * @dev Returns the number of values in the set. O(1). */ function length(AddressSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(AddressSet storage set, uint256 index) internal view returns (address) { return address(uint256(_at(set._inner, index))); } // UintSet struct UintSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(UintSet storage set, uint256 value) internal returns (bool) { return _add(set._inner, bytes32(value)); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(UintSet storage set, uint256 value) internal returns (bool) { return _remove(set._inner, bytes32(value)); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(UintSet storage set, uint256 value) internal view returns (bool) { return _contains(set._inner, bytes32(value)); } /** * @dev Returns the number of values on the set. O(1). */ function length(UintSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(UintSet storage set, uint256 index) internal view returns (uint256) { return uint256(_at(set._inner, index)); } } library Strings { /** * @dev Converts a `uint256` to its ASCII `string` representation. */ function toString(uint256 value) internal pure returns (string memory) { // Inspired by OraclizeAPI's implementation - MIT licence // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol if (value == 0) { return "0"; } uint256 temp = value; uint256 digits; while (temp != 0) { digits++; temp /= 10; } bytes memory buffer = new bytes(digits); uint256 index = digits - 1; temp = value; while (temp != 0) { buffer[index--] = byte(uint8(48 + temp % 10)); temp /= 10; } return string(buffer); } } contract DigitalaxAccessControls is AccessControl { /// @notice Role definitions bytes32 public constant MINTER_ROLE = keccak256("MINTER_ROLE"); bytes32 public constant SMART_CONTRACT_ROLE = keccak256("SMART_CONTRACT_ROLE"); /// @notice Events for adding and removing various roles event AdminRoleGranted( address indexed beneficiary, address indexed caller ); event AdminRoleRemoved( address indexed beneficiary, address indexed caller ); event MinterRoleGranted( address indexed beneficiary, address indexed caller ); event MinterRoleRemoved( address indexed beneficiary, address indexed caller ); event SmartContractRoleGranted( address indexed beneficiary, address indexed caller ); event SmartContractRoleRemoved( address indexed beneficiary, address indexed caller ); /** * @notice The deployer is automatically given the admin role which will allow them to then grant roles to other addresses */ constructor() public { _setupRole(DEFAULT_ADMIN_ROLE, _msgSender()); } ///////////// // Lookups // ///////////// /** * @notice Used to check whether an address has the admin role * @param _address EOA or contract being checked * @return bool True if the account has the role or false if it does not */ function hasAdminRole(address _address) external view returns (bool) { return hasRole(DEFAULT_ADMIN_ROLE, _address); } /** * @notice Used to check whether an address has the minter role * @param _address EOA or contract being checked * @return bool True if the account has the role or false if it does not */ function hasMinterRole(address _address) external view returns (bool) { return hasRole(MINTER_ROLE, _address); } /** * @notice Used to check whether an address has the smart contract role * @param _address EOA or contract being checked * @return bool True if the account has the role or false if it does not */ function hasSmartContractRole(address _address) external view returns (bool) { return hasRole(SMART_CONTRACT_ROLE, _address); } /////////////// // Modifiers // /////////////// /** * @notice Grants the admin role to an address * @dev The sender must have the admin role * @param _address EOA or contract receiving the new role */ function addAdminRole(address _address) external { grantRole(DEFAULT_ADMIN_ROLE, _address); emit AdminRoleGranted(_address, _msgSender()); } /** * @notice Removes the admin role from an address * @dev The sender must have the admin role * @param _address EOA or contract affected */ function removeAdminRole(address _address) external { revokeRole(DEFAULT_ADMIN_ROLE, _address); emit AdminRoleRemoved(_address, _msgSender()); } /** * @notice Grants the minter role to an address * @dev The sender must have the admin role * @param _address EOA or contract receiving the new role */ function addMinterRole(address _address) external { grantRole(MINTER_ROLE, _address); emit MinterRoleGranted(_address, _msgSender()); } /** * @notice Removes the minter role from an address * @dev The sender must have the admin role * @param _address EOA or contract affected */ function removeMinterRole(address _address) external { revokeRole(MINTER_ROLE, _address); emit MinterRoleRemoved(_address, _msgSender()); } /** * @notice Grants the smart contract role to an address * @dev The sender must have the admin role * @param _address EOA or contract receiving the new role */ function addSmartContractRole(address _address) external { grantRole(SMART_CONTRACT_ROLE, _address); emit SmartContractRoleGranted(_address, _msgSender()); } /** * @notice Removes the smart contract role from an address * @dev The sender must have the admin role * @param _address EOA or contract affected */ function removeSmartContractRole(address _address) external { revokeRole(SMART_CONTRACT_ROLE, _address); emit SmartContractRoleRemoved(_address, _msgSender()); } } contract ERC165 is IERC165 { /* * bytes4(keccak256('supportsInterface(bytes4)')) == 0x01ffc9a7 */ bytes4 private constant _INTERFACE_ID_ERC165 = 0x01ffc9a7; /** * @dev Mapping of interface ids to whether or not it's supported. */ mapping(bytes4 => bool) private _supportedInterfaces; constructor () internal { // Derived contracts need only register support for their own interfaces, // we register support for ERC165 itself here _registerInterface(_INTERFACE_ID_ERC165); } /** * @dev See {IERC165-supportsInterface}. * * Time complexity O(1), guaranteed to always use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) public view override returns (bool) { return _supportedInterfaces[interfaceId]; } /** * @dev Registers the contract as an implementer of the interface defined by * `interfaceId`. Support of the actual ERC165 interface is automatic and * registering its interface id is not required. * * See {IERC165-supportsInterface}. * * Requirements: * * - `interfaceId` cannot be the ERC165 invalid interface (`0xffffffff`). */ function _registerInterface(bytes4 interfaceId) internal virtual { require(interfaceId != 0xffffffff, "ERC165: invalid interface id"); _supportedInterfaces[interfaceId] = true; } } contract ERC721WithSameTokenURIForAllTokens is Context, ERC165, IERC721, IERC721Metadata, IERC721Enumerable { using SafeMath for uint256; using Address for address; using EnumerableSet for EnumerableSet.UintSet; using EnumerableMap for EnumerableMap.UintToAddressMap; using Strings for uint256; // Equals to `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))` // which can be also obtained as `IERC721Receiver(0).onERC721Received.selector` bytes4 private constant _ERC721_RECEIVED = 0x150b7a02; // Mapping from holder address to their (enumerable) set of owned tokens mapping (address => EnumerableSet.UintSet) private _holderTokens; // Enumerable mapping from token ids to their owners EnumerableMap.UintToAddressMap private _tokenOwners; // Mapping from token ID to approved address mapping (uint256 => address) private _tokenApprovals; // Mapping from owner to operator approvals mapping (address => mapping (address => bool)) private _operatorApprovals; // Token name string private _name; // Token symbol string private _symbol; // Single token URI for all tokens string public tokenURI_; /* * bytes4(keccak256('balanceOf(address)')) == 0x70a08231 * bytes4(keccak256('ownerOf(uint256)')) == 0x6352211e * bytes4(keccak256('approve(address,uint256)')) == 0x095ea7b3 * bytes4(keccak256('getApproved(uint256)')) == 0x081812fc * bytes4(keccak256('setApprovalForAll(address,bool)')) == 0xa22cb465 * bytes4(keccak256('isApprovedForAll(address,address)')) == 0xe985e9c5 * bytes4(keccak256('transferFrom(address,address,uint256)')) == 0x23b872dd * bytes4(keccak256('safeTransferFrom(address,address,uint256)')) == 0x42842e0e * bytes4(keccak256('safeTransferFrom(address,address,uint256,bytes)')) == 0xb88d4fde * * => 0x70a08231 ^ 0x6352211e ^ 0x095ea7b3 ^ 0x081812fc ^ * 0xa22cb465 ^ 0xe985e9c5 ^ 0x23b872dd ^ 0x42842e0e ^ 0xb88d4fde == 0x80ac58cd */ bytes4 private constant _INTERFACE_ID_ERC721 = 0x80ac58cd; /* * bytes4(keccak256('name()')) == 0x06fdde03 * bytes4(keccak256('symbol()')) == 0x95d89b41 * bytes4(keccak256('tokenURI(uint256)')) == 0xc87b56dd * * => 0x06fdde03 ^ 0x95d89b41 ^ 0xc87b56dd == 0x5b5e139f */ bytes4 private constant _INTERFACE_ID_ERC721_METADATA = 0x5b5e139f; /* * bytes4(keccak256('totalSupply()')) == 0x18160ddd * bytes4(keccak256('tokenOfOwnerByIndex(address,uint256)')) == 0x2f745c59 * bytes4(keccak256('tokenByIndex(uint256)')) == 0x4f6ccce7 * * => 0x18160ddd ^ 0x2f745c59 ^ 0x4f6ccce7 == 0x780e9d63 */ bytes4 private constant _INTERFACE_ID_ERC721_ENUMERABLE = 0x780e9d63; /** * @dev Initializes the contract by setting a `name` and a `symbol` to the token collection. */ constructor (string memory name, string memory symbol) public { _name = name; _symbol = symbol; // register the supported interfaces to conform to ERC721 via ERC165 _registerInterface(_INTERFACE_ID_ERC721); _registerInterface(_INTERFACE_ID_ERC721_METADATA); _registerInterface(_INTERFACE_ID_ERC721_ENUMERABLE); } /** * @dev See {IERC721-balanceOf}. */ function balanceOf(address owner) public view override returns (uint256) { require(owner != address(0), "ERC721: balance query for the zero address"); return _holderTokens[owner].length(); } /** * @dev See {IERC721-ownerOf}. */ function ownerOf(uint256 tokenId) public view override returns (address) { return _tokenOwners.get(tokenId, "ERC721: owner query for nonexistent token"); } /** * @dev See {IERC721Metadata-name}. */ function name() public view override returns (string memory) { return _name; } /** * @dev See {IERC721Metadata-symbol}. */ function symbol() public view override returns (string memory) { return _symbol; } /** * @dev See {IERC721Metadata-tokenURI}. */ function tokenURI(uint256 tokenId) public view override returns (string memory) { require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token"); return tokenURI_; } /** * @dev See {IERC721Enumerable-tokenOfOwnerByIndex}. */ function tokenOfOwnerByIndex(address owner, uint256 index) public view override returns (uint256) { return _holderTokens[owner].at(index); } /** * @dev See {IERC721Enumerable-totalSupply}. */ function totalSupply() public view override returns (uint256) { // _tokenOwners are indexed by tokenIds, so .length() returns the number of tokenIds return _tokenOwners.length(); } /** * @dev See {IERC721Enumerable-tokenByIndex}. */ function tokenByIndex(uint256 index) public view override returns (uint256) { (uint256 tokenId, ) = _tokenOwners.at(index); return tokenId; } /** * @dev See {IERC721-approve}. */ function approve(address to, uint256 tokenId) public virtual override { address owner = ownerOf(tokenId); require(to != owner, "ERC721: approval to current owner"); require(_msgSender() == owner || isApprovedForAll(owner, _msgSender()), "ERC721: approve caller is not owner nor approved for all" ); _approve(to, tokenId); } /** * @dev See {IERC721-getApproved}. */ function getApproved(uint256 tokenId) public view override returns (address) { require(_exists(tokenId), "ERC721: approved query for nonexistent token"); return _tokenApprovals[tokenId]; } /** * @dev See {IERC721-setApprovalForAll}. */ function setApprovalForAll(address operator, bool approved) public virtual override { require(operator != _msgSender(), "ERC721: approve to caller"); _operatorApprovals[_msgSender()][operator] = approved; emit ApprovalForAll(_msgSender(), operator, approved); } /** * @dev See {IERC721-isApprovedForAll}. */ function isApprovedForAll(address owner, address operator) public view override returns (bool) { return _operatorApprovals[owner][operator]; } /** * @dev See {IERC721-transferFrom}. */ function transferFrom(address from, address to, uint256 tokenId) public virtual override { //solhint-disable-next-line max-line-length require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved"); _transfer(from, to, tokenId); } /** * @dev See {IERC721-safeTransferFrom}. */ function safeTransferFrom(address from, address to, uint256 tokenId) public virtual override { safeTransferFrom(from, to, tokenId, ""); } /** * @dev See {IERC721-safeTransferFrom}. */ function safeTransferFrom(address from, address to, uint256 tokenId, bytes memory _data) public virtual override { require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved"); _safeTransfer(from, to, tokenId, _data); } /** * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients * are aware of the ERC721 protocol to prevent tokens from being forever locked. * * `_data` is additional data, it has no specified format and it is sent in call to `to`. * * This internal function is equivalent to {safeTransferFrom}, and can be used to e.g. * implement alternative mechanisms to perform token transfer, such as signature-based. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function _safeTransfer(address from, address to, uint256 tokenId, bytes memory _data) internal virtual { _transfer(from, to, tokenId); require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer"); } /** * @dev Returns whether `tokenId` exists. * * Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}. * * Tokens start existing when they are minted (`_mint`), * and stop existing when they are burned (`_burn`). */ function _exists(uint256 tokenId) internal view returns (bool) { return _tokenOwners.contains(tokenId); } /** * @dev Returns whether `spender` is allowed to manage `tokenId`. * * Requirements: * * - `tokenId` must exist. */ function _isApprovedOrOwner(address spender, uint256 tokenId) internal view returns (bool) { require(_exists(tokenId), "ERC721: operator query for nonexistent token"); address owner = ownerOf(tokenId); return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender)); } /** * @dev Safely mints `tokenId` and transfers it to `to`. * * Requirements: d* * - `tokenId` must not exist. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function _safeMint(address to, uint256 tokenId) internal virtual { _safeMint(to, tokenId, ""); } /** * @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is * forwarded in {IERC721Receiver-onERC721Received} to contract recipients. */ function _safeMint(address to, uint256 tokenId, bytes memory _data) internal virtual { _mint(to, tokenId); require(_checkOnERC721Received(address(0), to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer"); } /** * @dev Mints `tokenId` and transfers it to `to`. * * WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible * * Requirements: * * - `tokenId` must not exist. * - `to` cannot be the zero address. * * Emits a {Transfer} event. */ function _mint(address to, uint256 tokenId) internal virtual { require(to != address(0), "ERC721: mint to the zero address"); require(!_exists(tokenId), "ERC721: token already minted"); _beforeTokenTransfer(address(0), to, tokenId); _holderTokens[to].add(tokenId); _tokenOwners.set(tokenId, to); emit Transfer(address(0), to, tokenId); } /** * @dev Destroys `tokenId`. * The approval is cleared when the token is burned. * * Requirements: * * - `tokenId` must exist. * * Emits a {Transfer} event. */ function _burn(uint256 tokenId) internal virtual { address owner = ownerOf(tokenId); _beforeTokenTransfer(owner, address(0), tokenId); // Clear approvals _approve(address(0), tokenId); _holderTokens[owner].remove(tokenId); _tokenOwners.remove(tokenId); emit Transfer(owner, address(0), tokenId); } /** * @dev Transfers `tokenId` from `from` to `to`. * As opposed to {transferFrom}, this imposes no restrictions on msg.sender. * * Requirements: * * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * * Emits a {Transfer} event. */ function _transfer(address from, address to, uint256 tokenId) internal virtual { require(ownerOf(tokenId) == from, "ERC721: transfer of token that is not own"); require(to != address(0), "ERC721: transfer to the zero address"); _beforeTokenTransfer(from, to, tokenId); // Clear approvals from the previous owner _approve(address(0), tokenId); _holderTokens[from].remove(tokenId); _holderTokens[to].add(tokenId); _tokenOwners.set(tokenId, to); emit Transfer(from, to, tokenId); } /** * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address. * The call is not executed if the target address is not a contract. * * @param from address representing the previous owner of the given token ID * @param to target address that will receive the tokens * @param tokenId uint256 ID of the token to be transferred * @param _data bytes optional data to send along with the call * @return bool whether the call correctly returned the expected magic value */ function _checkOnERC721Received(address from, address to, uint256 tokenId, bytes memory _data) private returns (bool) { if (!to.isContract()) { return true; } bytes memory returndata = to.functionCall(abi.encodeWithSelector( IERC721Receiver(to).onERC721Received.selector, _msgSender(), from, tokenId, _data ), "ERC721: transfer to non ERC721Receiver implementer"); bytes4 retval = abi.decode(returndata, (bytes4)); return (retval == _ERC721_RECEIVED); } function _approve(address to, uint256 tokenId) private { _tokenApprovals[tokenId] = to; emit Approval(ownerOf(tokenId), to, tokenId); } /** * @dev Hook that is called before any token transfer. This includes minting * and burning. * * Calling conditions: * * - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be * transferred to `to`. * - When `from` is zero, `tokenId` will be minted for `to`. * - When `to` is zero, ``from``'s `tokenId` will be burned. * - `from` cannot be the zero address. * - `to` cannot be the zero address. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer(address from, address to, uint256 tokenId) internal virtual { } } contract DigitalaxGenesisNFT is ERC721WithSameTokenURIForAllTokens("DigitalaxGenesis", "DXG") { using SafeMath for uint256; // @notice event emitted upon construction of this contract, used to bootstrap external indexers event DigitalaxGenesisNFTContractDeployed(); // @notice event emitted when a contributor buys a Genesis NFT event GenesisPurchased( address indexed buyer, uint256 indexed tokenId, uint256 contribution ); // @notice event emitted when a admin mints a Genesis NFT event AdminGenesisMinted( address indexed beneficiary, address indexed admin, uint256 indexed tokenId ); // @notice event emitted when a contributors amount is increased event ContributionIncreased( address indexed buyer, uint256 contribution ); // @notice event emitted when end date is changed event GenesisEndUpdated( uint256 genesisEndTimestamp, address indexed admin ); // @notice event emitted when DigitalaxAccessControls is updated event AccessControlsUpdated( address indexed newAdress ); // @notice responsible for enforcing admin access DigitalaxAccessControls public accessControls; // @notice all funds will be sent to this address pon purchase of a Genesis NFT address payable public fundsMultisig; // @notice start date for them the Genesis sale is open to the public, before this data no purchases can be made uint256 public genesisStartTimestamp; // @notice end date for them the Genesis sale is closed, no more purchased can be made after this point uint256 public genesisEndTimestamp; // @notice set after end time has been changed once, prevents further changes to end timestamp bool public genesisEndTimestampLocked; // @notice the minimum amount a buyer can contribute in a single go uint256 public constant minimumContributionAmount = 0.1 ether; // @notice the maximum accumulative amount a user can contribute to the genesis sale uint256 public constant maximumContributionAmount = 2 ether; // @notice accumulative => contribution total mapping(address => uint256) public contribution; // @notice global accumulative contribution amount uint256 public totalContributions; // @notice max number of paid contributions to the genesis sale uint256 public constant maxGenesisContributionTokens = 460; uint256 public totalAdminMints; constructor( DigitalaxAccessControls _accessControls, address payable _fundsMultisig, uint256 _genesisStartTimestamp, uint256 _genesisEndTimestamp, string memory _tokenURI ) public { accessControls = _accessControls; fundsMultisig = _fundsMultisig; genesisStartTimestamp = _genesisStartTimestamp; genesisEndTimestamp = _genesisEndTimestamp; tokenURI_ = _tokenURI; emit DigitalaxGenesisNFTContractDeployed(); } /** * @dev Proxy method for facilitating a single point of entry to either buy or contribute additional value to the Genesis sale * @dev Cannot contribute less than minimumContributionAmount * @dev Cannot contribute accumulative more than than maximumContributionAmount */ function buyOrIncreaseContribution() external payable { if (contribution[_msgSender()] == 0) { buy(); } else { increaseContribution(); } } /** * @dev Facilitating the initial purchase of a Genesis NFT * @dev Cannot contribute less than minimumContributionAmount * @dev Cannot contribute accumulative more than than maximumContributionAmount * @dev Reverts if already owns an genesis token * @dev Buyer receives a NFT on success * @dev All funds move to fundsMultisig */ function buy() public payable { require(contribution[_msgSender()] == 0, "DigitalaxGenesisNFT.buy: You already own a genesis NFT"); require( _getNow() >= genesisStartTimestamp && _getNow() <= genesisEndTimestamp, "DigitalaxGenesisNFT.buy: No genesis are available outside of the genesis window" ); uint256 _contributionAmount = msg.value; require( _contributionAmount >= minimumContributionAmount, "DigitalaxGenesisNFT.buy: Contribution does not meet minimum requirement" ); require( _contributionAmount <= maximumContributionAmount, "DigitalaxGenesisNFT.buy: You cannot exceed the maximum contribution amount" ); require(remainingGenesisTokens() > 0, "DigitalaxGenesisNFT.buy: Total number of genesis token holders reached"); contribution[_msgSender()] = _contributionAmount; totalContributions = totalContributions.add(_contributionAmount); (bool fundsTransferSuccess,) = fundsMultisig.call{value : _contributionAmount}(""); require(fundsTransferSuccess, "DigitalaxGenesisNFT.buy: Unable to send contribution to funds multisig"); uint256 tokenId = totalSupply().add(1); _safeMint(_msgSender(), tokenId); emit GenesisPurchased(_msgSender(), tokenId, _contributionAmount); } /** * @dev Facilitates an owner to increase there contribution * @dev Cannot contribute less than minimumContributionAmount * @dev Cannot contribute accumulative more than than maximumContributionAmount * @dev Reverts if caller does not already owns an genesis token * @dev All funds move to fundsMultisig */ function increaseContribution() public payable { require( _getNow() >= genesisStartTimestamp && _getNow() <= genesisEndTimestamp, "DigitalaxGenesisNFT.increaseContribution: No increases are possible outside of the genesis window" ); require( contribution[_msgSender()] > 0, "DigitalaxGenesisNFT.increaseContribution: You do not own a genesis NFT" ); uint256 _amountToIncrease = msg.value; contribution[_msgSender()] = contribution[_msgSender()].add(_amountToIncrease); require( contribution[_msgSender()] <= maximumContributionAmount, "DigitalaxGenesisNFT.increaseContribution: You cannot exceed the maximum contribution amount" ); totalContributions = totalContributions.add(_amountToIncrease); (bool fundsTransferSuccess,) = fundsMultisig.call{value : _amountToIncrease}(""); require( fundsTransferSuccess, "DigitalaxGenesisNFT.increaseContribution: Unable to send contribution to funds multisig" ); emit ContributionIncreased(_msgSender(), _amountToIncrease); } // Admin /** * @dev Allows a whitelisted admin to mint a token and issue it to a beneficiary * @dev One token per holder * @dev All holders contribution as set o zero on creation */ function adminBuy(address _beneficiary) external { require( accessControls.hasAdminRole(_msgSender()), "DigitalaxGenesisNFT.adminBuy: Sender must be admin" ); require(_beneficiary != address(0), "DigitalaxGenesisNFT.adminBuy: Beneficiary cannot be ZERO"); require(balanceOf(_beneficiary) == 0, "DigitalaxGenesisNFT.adminBuy: Beneficiary already owns a genesis NFT"); uint256 tokenId = totalSupply().add(1); _safeMint(_beneficiary, tokenId); // Increase admin mint counts totalAdminMints = totalAdminMints.add(1); emit AdminGenesisMinted(_beneficiary, _msgSender(), tokenId); } /** * @dev Allows a whitelisted admin to update the end date of the genesis */ function updateGenesisEnd(uint256 _end) external { require( accessControls.hasAdminRole(_msgSender()), "DigitalaxGenesisNFT.updateGenesisEnd: Sender must be admin" ); // If already passed, dont allow opening again require(genesisEndTimestamp > _getNow(), "DigitalaxGenesisNFT.updateGenesisEnd: End time already passed"); // Only allow setting this once require(!genesisEndTimestampLocked, "DigitalaxGenesisNFT.updateGenesisEnd: End time locked"); genesisEndTimestamp = _end; // Lock future end time modifications genesisEndTimestampLocked = true; emit GenesisEndUpdated(genesisEndTimestamp, _msgSender()); } /** * @dev Allows a whitelisted admin to update the start date of the genesis */ function updateAccessControls(DigitalaxAccessControls _accessControls) external { require( accessControls.hasAdminRole(_msgSender()), "DigitalaxGenesisNFT.updateAccessControls: Sender must be admin" ); require(address(_accessControls) != address(0), "DigitalaxGenesisNFT.updateAccessControls: Zero Address"); accessControls = _accessControls; emit AccessControlsUpdated(address(_accessControls)); } /** * @dev Returns total remaining number of tokens available in the Genesis sale */ function remainingGenesisTokens() public view returns (uint256) { return _getMaxGenesisContributionTokens() - (totalSupply() - totalAdminMints); } // Internal function _getNow() internal virtual view returns (uint256) { return block.timestamp; } function _getMaxGenesisContributionTokens() internal virtual view returns (uint256) { return maxGenesisContributionTokens; } /** * @dev Before token transfer hook to enforce that no token can be moved to another address until the genesis sale has ended */ function _beforeTokenTransfer(address from, address to, uint256 tokenId) internal override { if (from != address(0) && _getNow() <= genesisEndTimestamp) { revert("DigitalaxGenesisNFT._beforeTokenTransfer: Transfers are currently locked at this time"); } } }

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{"success": true, "error": null, "results": {"detectors": [{"check": "unused-return", "impact": "Medium", "confidence": "Medium"}]}}

0x8958d18c20e14b2e256d66a2996a3bfb695be6e5

pragma solidity 0.6.12; pragma experimental ABIEncoderV2; contract IAbacusOracle{ uint public callFee; function getJobResponse(uint64 _jobId) public view returns(uint64[] memory _values){ } function scheduleFunc(address to ,uint callTime, bytes memory data , uint fee , uint gaslimit ,uint gasprice)public payable{} } contract Initializable { /** * @dev Indicates that the contract has been initialized. */ bool private initialized; /** * @dev Indicates that the contract is in the process of being initialized. */ bool private initializing; /** * @dev Modifier to use in the initializer function of a contract. */ modifier initializer() { require(initializing || isConstructor() || !initialized, "Contract instance has already been initialized"); bool isTopLevelCall = !initializing; if (isTopLevelCall) { initializing = true; initialized = true; } _; if (isTopLevelCall) { initializing = false; } } /// @dev Returns true if and only if the function is running in the constructor function isConstructor() private view returns (bool) { // extcodesize checks the size of the code stored in an address, and // address returns the current address. Since the code is still not // deployed when running a constructor, any checks on its code size will // yield zero, making it an effective way to detect if a contract is // under construction or not. address self = address(this); uint256 cs; assembly { cs := extcodesize(self) } return cs == 0; } // Reserved storage space to allow for layout changes in the future. uint256[50] private ______gap; } abstract contract Context { function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } abstract contract AccessControl is Context { using EnumerableSet for EnumerableSet.AddressSet; using Address for address; struct RoleData { EnumerableSet.AddressSet members; bytes32 adminRole; } mapping (bytes32 => RoleData) private _roles; bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00; /** * @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole` * * `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite * {RoleAdminChanged} not being emitted signaling this. * * _Available since v3.1._ */ event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole); /** * @dev Emitted when `account` is granted `role`. * * `sender` is the account that originated the contract call, an admin role * bearer except when using {_setupRole}. */ event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender); /** * @dev Emitted when `account` is revoked `role`. * * `sender` is the account that originated the contract call: * - if using `revokeRole`, it is the admin role bearer * - if using `renounceRole`, it is the role bearer (i.e. `account`) */ event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender); /** * @dev Returns `true` if `account` has been granted `role`. */ function hasRole(bytes32 role, address account) public view returns (bool) { return _roles[role].members.contains(account); } /** * @dev Returns the number of accounts that have `role`. Can be used * together with {getRoleMember} to enumerate all bearers of a role. */ function getRoleMemberCount(bytes32 role) public view returns (uint256) { return _roles[role].members.length(); } /** * @dev Returns one of the accounts that have `role`. `index` must be a * value between 0 and {getRoleMemberCount}, non-inclusive. * * Role bearers are not sorted in any particular way, and their ordering may * change at any point. * * WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure * you perform all queries on the same block. See the following * https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post] * for more information. */ function getRoleMember(bytes32 role, uint256 index) public view returns (address) { return _roles[role].members.at(index); } /** * @dev Returns the admin role that controls `role`. See {grantRole} and * {revokeRole}. * * To change a role's admin, use {_setRoleAdmin}. */ function getRoleAdmin(bytes32 role) public view returns (bytes32) { return _roles[role].adminRole; } /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function grantRole(bytes32 role, address account) public virtual { require(hasRole(_roles[role].adminRole, _msgSender()), "AccessControl: sender must be an admin to grant"); _grantRole(role, account); } /** * @dev Revokes `role` from `account`. * * If `account` had been granted `role`, emits a {RoleRevoked} event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function revokeRole(bytes32 role, address account) public virtual { require(hasRole(_roles[role].adminRole, _msgSender()), "AccessControl: sender must be an admin to revoke"); _revokeRole(role, account); } /** * @dev Revokes `role` from the calling account. * * Roles are often managed via {grantRole} and {revokeRole}: this function's * purpose is to provide a mechanism for accounts to lose their privileges * if they are compromised (such as when a trusted device is misplaced). * * If the calling account had been granted `role`, emits a {RoleRevoked} * event. * * Requirements: * * - the caller must be `account`. */ function renounceRole(bytes32 role, address account) public virtual { require(account == _msgSender(), "AccessControl: can only renounce roles for self"); _revokeRole(role, account); } /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. Note that unlike {grantRole}, this function doesn't perform any * checks on the calling account. * * [WARNING] * ==== * This function should only be called from the constructor when setting * up the initial roles for the system. * * Using this function in any other way is effectively circumventing the admin * system imposed by {AccessControl}. * ==== */ function _setupRole(bytes32 role, address account) internal virtual { _grantRole(role, account); } /** * @dev Sets `adminRole` as ``role``'s admin role. * * Emits a {RoleAdminChanged} event. */ function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual { emit RoleAdminChanged(role, _roles[role].adminRole, adminRole); _roles[role].adminRole = adminRole; } function _grantRole(bytes32 role, address account) private { if (_roles[role].members.add(account)) { emit RoleGranted(role, account, _msgSender()); } } function _revokeRole(bytes32 role, address account) private { if (_roles[role].members.remove(account)) { emit RoleRevoked(role, account, _msgSender()); } } } contract ERC20Basic { uint public _totalSupply; string public name; string public symbol; uint public decimals; function totalSupply() public view returns (uint){} function balanceOf(address who) public view returns (uint){} function transfer(address to, uint value) public {} function transferFrom(address _from, address _to, uint _value) public{} function approve(address spender, uint amount) public {} function allowance(address _owner, address _spender) public view returns (uint remaining) {} event Transfer(address indexed from, address indexed to, uint value); } interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } contract ERC20 is Context, IERC20 { using SafeMath for uint256; using Address for address; mapping (address => uint256) private _balances; mapping (address => uint256) public lockedAmount; mapping (address => mapping (address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; uint8 private _decimals; /** * @dev Sets the values for {name} and {symbol}, initializes {decimals} with * a default value of 18. * * To select a different value for {decimals}, use {_setupDecimals}. * * All three of these values are immutable: they can only be set once during * construction. */ constructor (string memory name, string memory symbol,uint8 decimals) public { _name = name; _symbol = symbol; _decimals = decimals; } /** * @dev Returns the name of the token. */ function name() public view returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5,05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is * called. * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view returns (uint8) { return _decimals; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `recipient` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address recipient, uint256 amount) public virtual override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { _approve(_msgSender(), spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}; * * Requirements: * - `sender` and `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. * - the caller must have allowance for ``sender``'s tokens of at least * `amount`. */ function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) { _transfer(sender, recipient, amount); _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance")); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function availableAmount(address owner) public view returns(uint256){ return balanceOf(owner).sub(lockedAmount[owner]); } function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue)); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero")); return true; } /** * @dev Moves tokens `amount` from `sender` to `recipient`. * * This is internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `sender` cannot be the zero address. * - `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. */ function _transfer(address sender, address recipient, uint256 amount) internal virtual { require(sender != address(0), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); require(amount <= availableAmount(sender),"ERC20 : amount exceeds available amount"); _beforeTokenTransfer(sender, recipient, amount); _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance"); _balances[recipient] = _balances[recipient].add(amount); emit Transfer(sender, recipient, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements * * - `to` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply = _totalSupply.add(amount); _balances[account] = _balances[account].add(amount); emit Transfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); require(amount <= availableAmount(account),"ERC20 : burn exceeds available amount"); _beforeTokenTransfer(account, address(0), amount); _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance"); _totalSupply = _totalSupply.sub(amount); emit Transfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens. * * This is internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve(address owner, address spender, uint256 amount) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); require(amount <= availableAmount(owner),"ERC20 : approve amount exceeds available amount"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } function _lock(address owner,uint256 amount) internal virtual { require(owner != address(0), "ERC20: lock for zero address"); require(amount <= availableAmount(owner),"ERC20: lock value more tha available amount"); lockedAmount[owner] = lockedAmount[owner].add(amount); } function _release(address owner,uint256 amount) internal virtual{ require(owner != address(0), "ERC20: release for zero address"); require(amount <= lockedAmount[owner],"ERC20 : release value more then locked value"); lockedAmount[owner] = lockedAmount[owner].sub(amount); } /** * @dev Sets {decimals} to a value other than the default one of 18. * * WARNING: This function should only be called from the constructor. Most * applications that interact with token contracts will not expect * {decimals} to ever change, and may work incorrectly if it does. */ function _setupDecimals(uint8 decimals_) internal { _decimals = decimals_; } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be to transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { } } library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // According to EIP-1052, 0x0 is the value returned for not-yet created accounts // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned // for accounts without code, i.e. `keccak256('')` bytes32 codehash; bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470; // solhint-disable-next-line no-inline-assembly assembly { codehash := extcodehash(account) } return (codehash != accountHash && codehash != 0x0); } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain`call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return _functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); return _functionCallWithValue(target, data, value, errorMessage); } function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) { require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: weiValue }(data); if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } library EnumerableSet { // To implement this library for multiple types with as little code // repetition as possible, we write it in terms of a generic Set type with // bytes32 values. // The Set implementation uses private functions, and user-facing // implementations (such as AddressSet) are just wrappers around the // underlying Set. // This means that we can only create new EnumerableSets for types that fit // in bytes32. struct Set { // Storage of set values bytes32[] _values; // Position of the value in the `values` array, plus 1 because index 0 // means a value is not in the set. mapping (bytes32 => uint256) _indexes; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function _add(Set storage set, bytes32 value) private returns (bool) { if (!_contains(set, value)) { set._values.push(value); // The value is stored at length-1, but we add 1 to all indexes // and use 0 as a sentinel value set._indexes[value] = set._values.length; return true; } else { return false; } } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function _remove(Set storage set, bytes32 value) private returns (bool) { // We read and store the value's index to prevent multiple reads from the same storage slot uint256 valueIndex = set._indexes[value]; if (valueIndex != 0) { // Equivalent to contains(set, value) // To delete an element from the _values array in O(1), we swap the element to delete with the last one in // the array, and then remove the last element (sometimes called as 'swap and pop'). // This modifies the order of the array, as noted in {at}. uint256 toDeleteIndex = valueIndex - 1; uint256 lastIndex = set._values.length - 1; // When the value to delete is the last one, the swap operation is unnecessary. However, since this occurs // so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement. bytes32 lastvalue = set._values[lastIndex]; // Move the last value to the index where the value to delete is set._values[toDeleteIndex] = lastvalue; // Update the index for the moved value set._indexes[lastvalue] = toDeleteIndex + 1; // All indexes are 1-based // Delete the slot where the moved value was stored set._values.pop(); // Delete the index for the deleted slot delete set._indexes[value]; return true; } else { return false; } } /** * @dev Returns true if the value is in the set. O(1). */ function _contains(Set storage set, bytes32 value) private view returns (bool) { return set._indexes[value] != 0; } /** * @dev Returns the number of values on the set. O(1). */ function _length(Set storage set) private view returns (uint256) { return set._values.length; } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function _at(Set storage set, uint256 index) private view returns (bytes32) { require(set._values.length > index, "EnumerableSet: index out of bounds"); return set._values[index]; } // AddressSet struct AddressSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(AddressSet storage set, address value) internal returns (bool) { return _add(set._inner, bytes32(uint256(value))); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(AddressSet storage set, address value) internal returns (bool) { return _remove(set._inner, bytes32(uint256(value))); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(AddressSet storage set, address value) internal view returns (bool) { return _contains(set._inner, bytes32(uint256(value))); } /** * @dev Returns the number of values in the set. O(1). */ function length(AddressSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(AddressSet storage set, uint256 index) internal view returns (address) { return address(uint256(_at(set._inner, index))); } // UintSet struct UintSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(UintSet storage set, uint256 value) internal returns (bool) { return _add(set._inner, bytes32(value)); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(UintSet storage set, uint256 value) internal returns (bool) { return _remove(set._inner, bytes32(value)); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(UintSet storage set, uint256 value) internal view returns (bool) { return _contains(set._inner, bytes32(value)); } /** * @dev Returns the number of values on the set. O(1). */ function length(UintSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(UintSet storage set, uint256 index) internal view returns (uint256) { return uint256(_at(set._inner, index)); } } library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } contract Pausable is Context { /** * @dev Emitted when the pause is triggered by `account`. */ event Paused(address account); /** * @dev Emitted when the pause is lifted by `account`. */ event Unpaused(address account); bool private _paused; /** * @dev Initializes the contract in unpaused state. */ constructor () internal { _paused = false; } /** * @dev Returns true if the contract is paused, and false otherwise. */ function paused() public view returns (bool) { return _paused; } /** * @dev Modifier to make a function callable only when the contract is not paused. * * Requirements: * * - The contract must not be paused. */ modifier whenNotPaused() { require(!_paused, "Pausable: paused"); _; } /** * @dev Modifier to make a function callable only when the contract is paused. * * Requirements: * * - The contract must be paused. */ modifier whenPaused() { require(_paused, "Pausable: not paused"); _; } /** * @dev Triggers stopped state. * * Requirements: * * - The contract must not be paused. */ function _pause() internal virtual whenNotPaused { _paused = true; emit Paused(_msgSender()); } /** * @dev Returns to normal state. * * Requirements: * * - The contract must be paused. */ function _unpause() internal virtual whenPaused { _paused = false; emit Unpaused(_msgSender()); } } abstract contract ERC20Pausable is ERC20, Pausable { /** * @dev See {ERC20-_beforeTokenTransfer}. * * Requirements: * * - the contract must not be paused. */ function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual override { super._beforeTokenTransfer(from, to, amount); require(!paused(), "ERC20Pausable: token transfer while paused"); } } contract wERC20 is Context, AccessControl, ERC20, ERC20Pausable { bytes32 public constant MINTER_ROLE = keccak256("MINTER_ROLE"); bytes32 public constant PAUSER_ROLE = keccak256("PAUSER_ROLE"); bytes32 public constant ETMOWNER_ROLE = keccak256("ETM_ROLE"); /** * @dev Grants `DEFAULT_ADMIN_ROLE`, `MINTER_ROLE` and `PAUSER_ROLE` to the * account that deploys the contract. * * See {ERC20-constructor}. */ constructor(string memory name, string memory symbol,uint8 decimals,address admin,address etmOwner) public ERC20(name, symbol,decimals) { _setupRole(DEFAULT_ADMIN_ROLE, admin); _setupRole(ETMOWNER_ROLE, etmOwner); _setupRole(MINTER_ROLE, admin); _setupRole(PAUSER_ROLE, admin); } /** * @dev Creates `amount` new tokens for `to`. * * See {ERC20-_mint}. * * Requirements: * * - the caller must have the `MINTER_ROLE`. */ function mint(address to, uint256 amount) public virtual { require(hasRole(MINTER_ROLE, _msgSender()), "ERC20PresetMinterPauser: must have minter role to mint"); _mint(to, amount); } function burnFrom(address _from,uint256 amount) public virtual{ require(hasRole(MINTER_ROLE, _msgSender()), "ERC20PresetMinterPauser: must have admin role to burn"); _burn(_from,amount); } /** * @dev Pauses all token transfers. * * See {ERC20Pausable} and {Pausable-_pause}. * * Requirements: * * - the caller must have the `PAUSER_ROLE`. */ function pause() public virtual { require(hasRole(PAUSER_ROLE, _msgSender()), "ERC20PresetMinterPauser: must have pauser role to pause"); _pause(); } function changeAdmin(address admin) public virtual{ require(hasRole(ETMOWNER_ROLE, _msgSender()), "ERC20PresetMinterPauser: must have admin role"); _setupRole(DEFAULT_ADMIN_ROLE, admin); _setupRole(MINTER_ROLE, admin); _setupRole(PAUSER_ROLE, admin); } /** * @dev Unpauses all token transfers. * * See {ERC20Pausable} and {Pausable-_unpause}. * * Requirements: * * - the caller must have the `PAUSER_ROLE`. */ function unpause() public virtual { require(hasRole(PAUSER_ROLE, _msgSender()), "ERC20PresetMinterPauser: must have pauser role to unpause"); _unpause(); } function lock(address account , uint256 amount) public virtual{ require(hasRole(MINTER_ROLE, _msgSender()), "ERC20PresetMinterPauser: must have admin role to lock"); _lock(account,amount); } function release(address account , uint256 amount) public virtual{ require(hasRole(MINTER_ROLE, _msgSender()), "ERC20PresetMinterPauser: must have admin role to release"); _release(account,amount); } function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual override(ERC20, ERC20Pausable) { super._beforeTokenTransfer(from, to, amount); } } ----------------------*/ struct freeStorage{ //USER DEPOSIT / BORROW STRUCTURE uint amount; uint time; string wtoken; uint usdvalue; } struct matchedOrder{ //RUNNING OR MATCHED ORDERS IN THIS FORM address payable supplier; address payable borrower; uint time; uint expiryDate; uint duration; uint amount; uint usdvalue; uint yield; string wtoken; uint duesPaid; } struct Order{ // PENDING ORDERS IN THIS FORMAT address payable creator; uint duration; uint amount; uint yield; string wtoken; } struct User{ uint totalDeposit; //USD VALUE OF TOTAL DEPOSIT AT DEPOSIT TIME uint totalBorrowed; //USD VALUE OF TOTAL DEPOSIT AT BORROW TIME freeStorage [] myDeposits; //DEPOSIT DATA freeStorage [] myBorrows; //BORROW DATA mapping(string => uint) deposits; //CURRENCY-WISE TOTAL DEPOSIT COUNT FULL VALUE mapping(string => uint) borrows; //CURRENCY-WISE TOTAL BORROW COUNT FULL VALUE uint64 [] borrowedOrders; //BORROWED ORDER - ORDER ID uint64 [] createdOrders; //CREATED ORDER - ORDER ID uint64 [] myOrders; //MATCHED ORDR - ORDER ID } mapping (string => uint[]) public poolindex; //Index of First Investor Bid for all currencies function initializeAddress(address payable EMMaddress,address AbacusAddress, address payable Initaddress) external initializer{ EMM = EcoMoneyManager(EMMaddress); abacus = IAbacusOracle(AbacusAddress); Init = EcoceliumInit(Initaddress); } /*============Main Functions=============== Key Notes - 1) Always call main functions of Data Manager with Wrapped Token 2) _status signifies (status == Status.OPENCREATOR) operation - Returns True for Deposit Functions and False for Borrow Function 3) require(Init.friendlyaddress(msg.sender) ,"Not Friendly Address"); - This is mentioned in the EcoceliumInit Contract 4) FreePusher/Popper are for Liquidity Pools and push/pop order and matchOrder is the Order Matching Engine 5) Fetch Token Price Returns Values in 10**8 6) Amounts are without setting off Token Decimals ---------------------------------*/ function freePusher(address userAddress, string memory token, uint _amount, bool _status) external { //_status signifies (status == Status.OPENCREATOR) operation require(Init.friendlyaddress(msg.sender) ,"Not Friendly Address"); uint _usdValue = USDValue(_amount, token); freeStorage memory newStorage = freeStorage({ amount: _amount, time: now, wtoken: token, usdvalue: _usdValue }); if(_status){ users[userAddress].myDeposits.push(newStorage); users[userAddress].totalDeposit += _usdValue; users[userAddress].deposits[token] += _amount; } else { users[userAddress].myBorrows.push(newStorage); users[userAddress].totalBorrowed += _usdValue; users[userAddress].borrows[token] += _amount; } } function freePopper(address userAddress, string memory _tokenSymbol, uint _amount, bool _status) public returns (uint dues) { require(Init.friendlyaddress(msg.sender),"Not Friendly Address"); if(_status) { require(users[userAddress].deposits[_tokenSymbol]>=_amount, "Insufficient Deposits"); users[userAddress].deposits[_tokenSymbol] -= _amount; } else { require(users[userAddress].borrows[_tokenSymbol]>=_amount,"Insufficient Borrowings"); users[userAddress].borrows[_tokenSymbol] -= _amount; } uint amountLeft= _amount; freeStorage [] storage mystorage = _status ? users[userAddress].myDeposits : users[userAddress].myBorrows; for( uint i= mystorage.length-1; amountLeft >0 ; i--){ if(keccak256(abi.encodePacked(mystorage[i].wtoken)) != keccak256(abi.encodePacked(_tokenSymbol))) { continue; } if (mystorage[i].amount <= amountLeft){ amountLeft -= mystorage[i].amount; _status ? users[userAddress].totalDeposit -= mystorage[i].usdvalue : users[userAddress].totalBorrowed -= mystorage[i].usdvalue; dues+= calculateECOEarning(USDValue(mystorage[i].amount,_tokenSymbol), _tokenSymbol, mystorage[i].time); mystorage.pop(); } else { _status ? users[userAddress].totalDeposit -= (mystorage[i].amount-amountLeft)*mystorage[i].usdvalue : users[userAddress].totalBorrowed -= (mystorage[i].amount-amountLeft)*mystorage[i].usdvalue; mystorage[i].amount -= amountLeft; dues += calculateECOEarning(USDValue(amountLeft,_tokenSymbol), _tokenSymbol, mystorage[i].time); amountLeft = 0; } } _status ? users[userAddress].myDeposits = mystorage : users[userAddress].myBorrows = mystorage; } function pushOrder(address payable userAddress,string memory _tokenSymbol ,uint _amount,uint _duration, uint _yield, bool _status) internal returns (uint){ (uint64 _orderId,uint newAmount,uint fee) = _ordersub(_amount, userAddress, _duration, _tokenSymbol); openOrderMap[_orderId] = Order({ creator : userAddress, duration : _duration, amount : newAmount, yield : _yield, wtoken : _tokenSymbol }); if(_status) { orderStatus[_orderId] = Status.OPENCREATOR; users[userAddress].createdOrders.push(_orderId); } else { orderStatus[_orderId] = Status.OPENBORROW; users[userAddress].borrowedOrders.push(_orderId); } poolSorter(_orderId, _tokenSymbol, true); orderUSDValue[_orderId]=USDValue(_amount,_tokenSymbol); return fee; } function poolSorter(uint64 _orderId, string memory _tokenSymbol, bool _status) internal { //Status here signifies Insertion if True, and Deletion if false uint64 [] memory temp; bool task = false; bool pooltask = false; uint pid; if(orderStatus[_orderId] == Status.OPENCREATOR) { pid = (openOrderMap[_orderId].duration/6) - 1; } else if(orderStatus[_orderId] == Status.OPENBORROW) { pid = (openOrderMap[_orderId].duration/6) + 5; } poolindex[_tokenSymbol][pid]=0; if(orderpool[_tokenSymbol].length==0 && _status) { orderpool[_tokenSymbol][0] = _orderId; } else { for((uint i, uint j)=(0,0);i<orderpool[_tokenSymbol].length;(i++,j++)) { temp[j]=orderpool[_tokenSymbol][i]; if(!task && _status && openOrderMap[temp[j]].yield > openOrderMap[_orderId].yield) { //Insertion Case temp[j]=_orderId; temp[++j]=orderpool[_tokenSymbol][i]; task = true; }else if(!task && !_status && _orderId == temp[j]){ //Deletion Case temp[j]=orderpool[_tokenSymbol][++i]; task = true; } if(uint(openOrderMap[temp[j]].duration/6) == uint(openOrderMap[_orderId].duration/6) && orderStatus[orderpool[_tokenSymbol][i]]==Status.OPENBORROW) { //Assigns updatePoolIndex with Highest Value of Borrow poolindex[_tokenSymbol][pid] = i; pooltask = true; } else if(uint(openOrderMap[temp[j]].duration/6) == uint(openOrderMap[_orderId].duration/6) && orderStatus[orderpool[_tokenSymbol][i]]==Status.OPENCREATOR && !pooltask) { poolindex[_tokenSymbol][pid] = i; pooltask = true; } } orderpool[_tokenSymbol] = temp; } } function matchOrder(address payable userAddress, string memory _tokenSymbol ,uint _amount,uint _duration,uint _yield, uint64 _orderId) internal { matchOrderMap[_orderId] = matchedOrder({ supplier : (orderStatus[_orderId] == Status.OPENBORROW) ? userAddress : openOrderMap[_orderId].creator, borrower : (orderStatus[_orderId] == Status.OPENCREATOR) ? userAddress : openOrderMap[_orderId].creator, time : now, expiryDate : now + _duration*(30 days), duration : _duration, amount : _amount, usdvalue : USDValue(_amount,_tokenSymbol), yield : _yield, wtoken : _tokenSymbol, duesPaid : 0 }); for((uint i,uint j)=(0,0); i<users[matchOrderMap[_orderId].supplier].createdOrders.length; (i++,j++)) { if(users[matchOrderMap[_orderId].supplier].createdOrders[i] == _orderId) { --j; continue; } users[matchOrderMap[_orderId].supplier].createdOrders[j] = users[matchOrderMap[_orderId].supplier].createdOrders[i]; } for((uint i,uint j)=(0,0); i<users[matchOrderMap[_orderId].borrower].borrowedOrders.length; (i++,j++)) { if(users[matchOrderMap[_orderId].borrower].borrowedOrders[i] == _orderId) { continue; } users[matchOrderMap[_orderId].borrower].borrowedOrders[j] = users[matchOrderMap[_orderId].borrower].borrowedOrders[i]; } delete openOrderMap[_orderId]; poolSorter(_orderId, _tokenSymbol, false); orderStatus[_orderId]=Status.MATCHED; orderUSDValue[_orderId]=USDValue(_amount,_tokenSymbol); users[matchOrderMap[_orderId].supplier].myOrders.push(_orderId); users[matchOrderMap[_orderId].borrower].myOrders.push(_orderId); scheduleExpiry(_orderId); scheduleCheck(_orderId,matchOrderMap[_orderId].borrower,1); EMM.WithdrawManager(EMM.wtormap(_tokenSymbol), _amount, matchOrderMap[_orderId].borrower); Init.emitOrderCreated(userAddress,_duration,_yield,_amount,_tokenSymbol); } function newOrder(address payable userAddress,string memory _tokenSymbol ,uint _amount,uint _duration, uint _yield, bool _status) external { require(Init.friendlyaddress(msg.sender),"Not Friendly Address"); uint amountLeft= _amount; uint index; if(_status){ index = poolindex[_tokenSymbol][(_duration/6)-1]; users[userAddress].deposits[_tokenSymbol] +=_amount; users[userAddress].totalDeposit += USDValue(_amount, _tokenSymbol); } else { index = poolindex[_tokenSymbol][(_duration/6)+5]; users[userAddress].borrows[_tokenSymbol] +=_amount; users[userAddress].totalBorrowed += USDValue(_amount, _tokenSymbol); } while(amountLeft>0){ if(index == 0) { pushOrder(userAddress, _tokenSymbol, _amount, _duration, _yield, _status); break; } Order memory iOrder = openOrderMap[orderpool[_tokenSymbol][index]]; if((_status && _yield>iOrder.yield) || (!_status && _yield<iOrder.yield) || (_status)?(orderStatus[orderpool[_tokenSymbol][index]] == Status.OPENCREATOR):(orderStatus[orderpool[_tokenSymbol][index]] == Status.OPENBORROW)){ pushOrder(userAddress, _tokenSymbol, _amount, _duration, _yield, _status); break; } else if(orderStatus[orderpool[_tokenSymbol][index]]== (_status ? Status.OPENBORROW : Status.OPENCREATOR)) { uint tduration = _duration > iOrder.duration ? _duration : iOrder.duration; uint tyield = _yield > iOrder.yield ? iOrder.yield : _yield; uint64 tID = orderpool[_tokenSymbol][index]; if(iOrder.amount>=amountLeft) { if(iOrder.amount != amountLeft) { pushOrder(iOrder.creator, _tokenSymbol, iOrder.amount-amountLeft, iOrder.duration, iOrder.yield, !_status); } matchOrder(userAddress, _tokenSymbol, amountLeft, tduration, tyield, tID); amountLeft=0; } else { pushOrder(userAddress, _tokenSymbol, amountLeft- iOrder.amount, _duration, _yield, _status); matchOrder(userAddress, _tokenSymbol, amountLeft, tduration, tyield, tID); amountLeft -= openOrderMap[orderpool[_tokenSymbol][index]].amount; } } } } function orderExpired (uint64 _orderId) public { require(Init.friendlyaddress(msg.sender),"Not Friendly Address"); require (matchOrderMap[_orderId].expiryDate <= now); EMM.releaseWrappedToken(matchOrderMap[_orderId].supplier,matchOrderMap[_orderId].amount, matchOrderMap[_orderId].wtoken); EMM.burnWrappedFrom(matchOrderMap[_orderId].supplier,matchOrderMap[_orderId].amount, matchOrderMap[_orderId].wtoken); EMM.WithdrawManager(EMM.wtormap(matchOrderMap[_orderId].wtoken), matchOrderMap[_orderId].amount, matchOrderMap[_orderId].supplier); users[matchOrderMap[_orderId].supplier].totalDeposit -= matchOrderMap[_orderId].usdvalue; users[matchOrderMap[_orderId].borrower].totalBorrowed -= matchOrderMap[_orderId].usdvalue; orderStatus[_orderId] = Status.CLOSED; //Init.OrderExpired(_orderId,msgSender,orderMonthlyDue(_orderId,msgSender,_duration)); } function payDue(uint64 _orderId,uint _duration,address msgSender) external returns (uint due){ due = orderMonthlyDue(_orderId,_duration); uint fee = (due*Init.rewardFee())/100; EMM.DepositManager(Init.ECO(), due+fee, msgSender); Init.setOwnerFeeVault(Init.WRAP_ECO_SYMBOL(), fee); matchOrderMap[_orderId].duesPaid += 1; matchOrderMap[_orderId].duesPaid >= uint((now - matchOrderMap[_orderId].time)/30 days) ? Init.setUserLocked(msgSender,false) : Init.setUserLocked(msgSender,true); Init.emitDuePaid(_orderId,msgSender,orderMonthlyDue(_orderId,_duration)); } function dueCheck(uint64 _orderId,address borrower,uint month) external returns(uint) { require (Init.friendlyaddress(msg.sender) && now >= matchOrderMap[_orderId].time + matchOrderMap[_orderId].duesPaid * 30 days); uint due = orderMonthlyDue(_orderId,1); EMM.mintECO(matchOrderMap[_orderId].supplier,due*(100-Init.rewardFee())/100); EMM.lockECO(matchOrderMap[_orderId].supplier,due*(100-Init.rewardFee())/100); if(matchOrderMap[_orderId].duesPaid < month && !Init.isRegistrar(borrower) && !Init.isUserLocked(borrower)){ Init.setUserLocked(borrower,true); orderExpired(_orderId); } else { Init.emitDuePaid(_orderId,borrower,orderMonthlyDue(_orderId,month+1)); scheduleCheck(_orderId,borrower,month+1); } } function scheduleExpiry(uint64 _orderId) internal{ uint time = matchOrderMap[_orderId].expiryDate - matchOrderMap[_orderId].time; bytes memory data = abi.encodeWithSelector(bytes4(keccak256('orderExpired(uint256)')),_orderId); uint callCost = 300000*1e9 + abacus.callFee(); abacus.scheduleFunc{value:callCost}(address(this), time ,data , abacus.callFee() ,300000 , 1e9 ); } function scheduleCheck(uint _orderId,address borrower,uint month) internal{ bytes memory data = abi.encodeWithSelector(bytes4(keccak256('dueCheck(uint256,address,uint256)')),_orderId,borrower,month); uint callCost = 300000*1e9 + abacus.callFee(); abacus.scheduleFunc{value:callCost}(address(this), 30 days ,data , abacus.callFee() ,300000 , 1e9 ); } function cancelOrder(uint64 _orderId) external{ require(Init.friendlyaddress(msg.sender)); if(orderStatus[_orderId]==Status.OPENCREATOR) { EMM.releaseWrappedToken(openOrderMap[_orderId].creator,openOrderMap[_orderId].amount, openOrderMap[_orderId].wtoken); EMM.burnWrappedFrom(openOrderMap[_orderId].creator,openOrderMap[_orderId].amount, openOrderMap[_orderId].wtoken); EMM.WithdrawManager(EMM.wtormap(openOrderMap[_orderId].wtoken),openOrderMap[_orderId].amount, openOrderMap[_orderId].creator); users[openOrderMap[_orderId].creator].deposits[openOrderMap[_orderId].wtoken] -=openOrderMap[_orderId].amount; users[openOrderMap[_orderId].creator].totalDeposit -= orderUSDValue[_orderId]; for((uint i,uint j)=(0,0); i<users[openOrderMap[_orderId].creator].createdOrders.length; (i++,j++)) { if(users[openOrderMap[_orderId].creator].createdOrders[i] == _orderId) { --j; continue; } users[openOrderMap[_orderId].creator].createdOrders[j] = users[openOrderMap[_orderId].creator].createdOrders[i]; } } else if(orderStatus[_orderId]==Status.OPENBORROW){ users[openOrderMap[_orderId].creator].borrows[openOrderMap[_orderId].wtoken] -=openOrderMap[_orderId].amount; users[openOrderMap[_orderId].creator].totalBorrowed -= orderUSDValue[_orderId]; for((uint i,uint j)=(0,0); i<users[openOrderMap[_orderId].creator].borrowedOrders.length; (i++,j++)) { if(users[openOrderMap[_orderId].creator].borrowedOrders[i] == _orderId) { continue; } users[openOrderMap[_orderId].creator].borrowedOrders[j] = users[openOrderMap[_orderId].creator].borrowedOrders[i]; } } poolSorter(_orderId, openOrderMap[_orderId].wtoken,false); delete openOrderMap[_orderId]; if(orderUSDValue[_orderId] > 0) { delete orderUSDValue[_orderId]; } orderStatus[_orderId] = Status.CLOSED; } /*==============Helpers============ ---------------------------------*/ function USDValue(uint amount, string memory _token) public view returns (uint usdvalue) { usdvalue = amount*fetchTokenPrice(_token)/(10**8)/(10**uint(wERC20(EMM.getwTokenAddress(_token)).decimals())); } function orderMonthlyDue(uint64 _orderId, uint _duration) public view returns(uint due){ orderStatus[_orderId] == Status.MATCHED ? due = USDValue (matchOrderMap[_orderId].amount, matchOrderMap[_orderId].wtoken) * matchOrderMap[_orderId].yield * _duration*30 days*fetchTokenPrice(Init.WRAP_ECO_SYMBOL())/3153600000/(10**8) : due = 0; } function fetchTokenPrice(string memory _tokenSymbol) public view returns(uint){ //Put any Token Wrapped or Direct uint response = uint(abacus.getJobResponse(EMM.getFetchId(_tokenSymbol))[0]); return response > 0 ? response : 0; } /*function issueReward(address userAddress, string memory _tokenSymbol, uint time, uint tokenUsdValue) internal { uint reward = calculateECOEarning(tokenUsdValue, _tokenSymbol, time); EMM.mintECO(userAddress, reward); }*/ function calculateECOEarning(uint usdvalue, string memory _tokenSymbol, uint time) private view returns (uint){ uint _amount = usdvalue*(10**16)/fetchTokenPrice(Init.WRAP_ECO_SYMBOL()); uint reward = (_amount * Init.slabRateDeposit(_tokenSymbol) * (now - time))/3153600000; //decimal from Abacus is setoff by decimal from Eco return reward; } function getECOEarnings(address userAddress) public view returns (uint){ uint ecobalance; for(uint i=0; i<users[userAddress].myDeposits.length; i++) { ecobalance += calculateECOEarning(users[userAddress].myDeposits[i].usdvalue, users[userAddress].myDeposits[i].wtoken, users[userAddress].myDeposits[i].time); } for(uint i=0; i<users[userAddress].myBorrows.length; i++) { ecobalance -= calculateECOEarning(users[userAddress].myBorrows[i].usdvalue, users[userAddress].myBorrows[i].wtoken, users[userAddress].myBorrows[i].time); } if(ecobalance > EMM.ecoWithdrawls(userAddress)) { return ecobalance - EMM.ecoWithdrawls(userAddress); } else { return uint(0); } } function _ordersub(uint amount,address userAddress,uint _duration,string memory _tokenSymbol) internal view returns (uint64, uint, uint){ uint newAmount = amount - (amount*Init.tradeFee())/100; uint fee = (amount*Init.tradeFee())/100; uint64 _orderId = uint64(uint(keccak256(abi.encodePacked(userAddress,_tokenSymbol,_duration,now)))); return (_orderId,newAmount,fee); } function getUserDepositsbyToken(address userAddress, string memory wtoken) public view returns(uint) { return users[userAddress].deposits[wtoken]; } function getUserBorrowedOrderbyToken(address userAddress, string memory wtoken) public view returns(uint) { return users[userAddress].borrows[wtoken]; } function getUserBorrowed(address userAddress) public view returns(uint) { return users[userAddress].totalBorrowed; } function getUserBorrowedOrder(address userAddress) public view returns (uint64 [] memory) { return users[userAddress].borrowedOrders; } function getUserDepositOrder(address userAddress) public view returns (uint64 [] memory) { return users[userAddress].createdOrders; } function getUserMatchOrder(address userAddress) public view returns (uint64 [] memory) { return users[userAddress].myOrders; } function getbuyPower(address userAddress) public view returns (uint buyPower){ if(Init.isRegistrar(userAddress)) { return (10**30); } if(Init.isUserLocked(userAddress)) { return 0; } if(users[userAddress].totalBorrowed > 0) { return users[userAddress].totalDeposit - ((users[userAddress].totalDeposit*Init.CDSpercent())/100) - users[userAddress].totalBorrowed; } else { return users[userAddress].totalDeposit; } } function getOrderIds(string memory wtoken) public view returns (uint64 [] memory orderIds) { return orderpool[wtoken]; } function updatePoolIndex(uint index, string memory wtoken, uint value) external { if(Init.friendlyaddress(msg.sender) == true) { poolindex[wtoken][index]= value; } } /*function deleteUserData(address userAddress) external { if(Init.friendlyaddress(msg.sender)==true) { delete users[userAddress]; } }*/ } contract Ecocelium is Initializable{ address public owner; address payable EMMAddress; IAbacusOracle abacus; EcoMoneyManager EMM; EcoceliumDataManager EDM; EcoceliumInit Init; function initialize(address _owner,address payable EMMaddress,address payable AbacusAddress,address EDMaddress, address payable Initaddress)public payable initializer { owner = _owner; EMM = EcoMoneyManager(EMMaddress); EMMAddress = EMMaddress; abacus = IAbacusOracle(AbacusAddress);//0x323f81D9F57d2c3d5555b14d90651aCDc03F9d52 EDM = EcoceliumDataManager(EDMaddress); Init = EcoceliumInit(Initaddress); } function changeOwner(address _owner) public{ require(msg.sender==owner); owner = _owner; } func pdateContracts() public{ require(msg.sender==owner); EMM = EcoMoneyManager(Init.MONEYMANAGER()); abacus = IAbacusOracle(Init.ABACUS()); EDM = EcoceliumDataManager(Init.DATAMANAGER()); } /*===========Main functions============ -------------------------------------*/ function Deposit(string memory rtoken, uint _amount) external payable { address _msgSender = msg.sender; string memory wtoken = EMM.getWrapped(rtoken); _deposit(rtoken, _amount, _msgSender, wtoken); EDM.freePusher(_msgSender, wtoken, _amount, true); EMM.mintWrappedToken(_msgSender, _amount, wtoken); EMM.lockWrappedToken(_msgSender, _amount,wtoken); } function _deposit(string memory rtoken,uint _amount, address msgSender, string memory wtoken) internal { require(EMM.getwTokenAddress(wtoken) != address(0),"not supported"); if(keccak256(abi.encodePacked(rtoken)) == keccak256(abi.encodePacked(Init.ETH_SYMBOL()))) { require(msg.value >= _amount); EMM.DepositManager{value:msg.value}(rtoken, _amount, msgSender); }else { EMM.DepositManager(rtoken, _amount, msgSender); } Init.emitSwap(msgSender,rtoken,wtoken,_amount); } function depositAndOrder(address payable userAddress,string memory rtoken ,uint _amount,uint _duration,uint _yield) external payable { require(msg.sender == userAddress); string memory wtoken = EMM.getWrapped(rtoken); _deposit(rtoken, _amount, userAddress, wtoken); EMM.mintWrappedToken(userAddress, _amount, wtoken); EMM.lockWrappedToken(userAddress, _amount,wtoken); EDM.newOrder(userAddress, EMM.getWrapped(rtoken), _amount, _duration, _yield, true); } function createOrder(address payable userAddress,string memory _tokenSymbol ,uint _amount,uint _duration,uint _yield) external payable { require(msg.sender == userAddress); require(_duration>=6, "Duration should be atleast 6 Months"); string memory wtoken = EMM.getWrapped(_tokenSymbol); require(EDM.getUserDepositsbyToken(userAddress, wtoken) >= _amount, "Insufficient Balance"); uint ecoEarnings = EDM.freePopper(userAddress, wtoken , _amount, true); if(ecoEarnings > EMM.ecoWithdrawls(userAddress)) { ecoEarnings-=EMM.ecoWithdrawls(userAddress); EMM.adjustEcoEarning(userAddress, EMM.ecoWithdrawls(userAddress)); EMM.WithdrawManager(Init.ECO(), ecoEarnings, userAddress); } else { EMM.adjustEcoEarning(userAddress, ecoEarnings); } EDM.newOrder(userAddress, wtoken, _amount, _duration, _yield, true); } function getAggEcoBalance(address userAddress) public view returns(uint) { return wERC20(EMM.getwTokenAddress(Init.WRAP_ECO_SYMBOL())).balanceOf(userAddress) + EDM.getECOEarnings(userAddress); } function borrowOrder(address userAddress, string memory rtoken, uint amount, uint duration, uint yield) public {//Rewrite this part require(isWithdrawEligible(userAddress, rtoken, amount)); EDM.newOrder(msg.sender,rtoken, amount,duration,yield,false); } function payDueOrder(uint64 _orderId,uint _duration) external { EDM.payDue(_orderId,_duration,msg.sender); } function clearBorrow(string memory rtoken, uint _amount) external payable{ address msgSender = msg.sender; string memory wtoken = EMM.getWrapped(rtoken); uint dues = EDM.freePopper(msgSender, wtoken, _amount, false); EMM.DepositManager(Init.ECO(), dues, msgSender); if(keccak256(abi.encodePacked(rtoken)) == keccak256(abi.encodePacked(Init.ETH_SYMBOL()))) { require(msg.value == _amount); EMM.DepositManager{value:_amount}(rtoken, _amount, msgSender); }else { EMM.DepositManager(rtoken, _amount, msgSender); } } function Borrow(uint _amount, string memory _tokenSymbol) public { require(isWithdrawEligible(msg.sender, _tokenSymbol, _amount)); EDM.freePusher(msg.sender, EMM.getWrapped(_tokenSymbol), _amount,false); EMM.WithdrawManager(_tokenSymbol, _amount, msg.sender); } function SwapWrapToWrap(string memory token1,string memory token2, uint token1amount) external returns(uint) { address payable msgSender = msg.sender; uint token2price = fetchTokenPrice(token2); uint token2amount = EDM.USDValue(token1amount,token1)*(100-Init.swapFee())*(10**uint(wERC20(EMM.getwTokenAddress(token2)).decimals()))*(10**8)/token2price/100; EMM.w2wswap(msgSender, token1, token1amount, token2amount, token2); uint ecoEarnings = EDM.freePopper(msgSender,token1,token1amount,true); if(ecoEarnings>0) { if(ecoEarnings > EMM.ecoWithdrawls(msgSender)) { ecoEarnings-=EMM.ecoWithdrawls(msgSender); if(EMM.ecoWithdrawls(msgSender) > 0) { EMM.adjustEcoEarning(msgSender, EMM.ecoWithdrawls(msgSender)); } EMM.WithdrawManager(Init.ECO(), ecoEarnings, msgSender); } else { EMM.adjustEcoEarning(msgSender, ecoEarnings); } } Init.setOwnerFeeVault(token1, token1amount*Init.swapFee()/100); EDM.freePusher(msgSender, token2,token2amount,true); Init.emitSwap(msgSender,token1,token2,token2amount); return token2amount; } function cancelOrder(uint64 _orderId) public{ (address creator,,,,) = EDM.openOrderMap(_orderId); require(msg.sender==creator); EDM.cancelOrder(_orderId); } receive() external payable { } /*==============Helpers============ ---------------------------------*/ function orderMonthlyDue(uint64 _orderId,uint _duration) public view returns(uint){ return EDM.orderMonthlyDue(_orderId,_duration); } function updateFees(uint _swapFee,uint _tradeFee,uint _rewardFee) public{ require(msg.sender == owner); Init.updateFees(_swapFee,_tradeFee,_rewardFee); } function getOrderIds(string memory wtoken) public view returns(uint64 [] memory){ return EDM.getOrderIds(wtoken); } function fetchTokenPrice(string memory _tokenSymbol) public view returns(uint){ return EDM.fetchTokenPrice(_tokenSymbol); } function Withdraw(string memory to, uint _amount) external { address payable msgSender = msg.sender; string memory from = EMM.getWrapped(to); require(!Init.isUserLocked(msgSender), "Your Address is Locked Pay Dues"); if( EDM.getUserBorrowed(msgSender) > 0) { require(isWithdrawEligible(msgSender, to, _amount) , "Not Eligible for Withdraw"); } if(keccak256(abi.encodePacked(to)) == keccak256(abi.encodePacked(Init.ECO()))) { require( getAggEcoBalance(msgSender) >= _amount,"Insufficient Balance"); if(EDM.getUserDepositsbyToken(msgSender, from) >=_amount) { _withdraw(msgSender, from, _amount, to); } else { uint amountLeft = _amount - EDM.getUserDepositsbyToken(msgSender, from); if(EDM.getUserDepositsbyToken(msgSender, from) > 0){ _withdraw(msgSender, from, _amount, to); } EMM.redeemEcoEarning(msgSender,amountLeft); } } else { require(EDM.getUserDepositsbyToken(msgSender, from)>=_amount,"Insufficient balance"); _withdraw(msgSender, from, _amount, to); } Init.emitSwap(msgSender,from,to,_amount); } function _withdraw(address payable msgSender, string memory from, uint amount, string memory to) internal { EMM.releaseWrappedToken(msgSender,amount, from); EMM.burnWrappedFrom(msgSender, amount, from); Init.setOwnerFeeVault(to,(amount*Init.rewardFee())/100); uint ecoEarnings = EDM.freePopper(msgSender,from,amount, true); if(ecoEarnings>0) { if(ecoEarnings > EMM.ecoWithdrawls(msgSender)) { ecoEarnings-=EMM.ecoWithdrawls(msgSender); if(EMM.ecoWithdrawls(msgSender) > 0) { EMM.adjustEcoEarning(msgSender, EMM.ecoWithdrawls(msgSender)); } EMM.WithdrawManager(Init.ECO(), ecoEarnings, msgSender); } else { EMM.adjustEcoEarning(msgSender, ecoEarnings); } } uint newAmount = amount - (amount*Init.rewardFee())/100; EMM.WithdrawManager(to,newAmount, msgSender); } function isWithdrawEligible(address userAddress, string memory to, uint amount) public view returns (bool Eligible){ return (EDM.getbuyPower(userAddress) > EDM.USDValue(amount,EMM.getWrapped(to))); } } contract EcoceliumInit is Initializable { address payable owner; address payable public MONEYMANAGER; address payable public DATAMANAGER; address payable public ECOCELIUM; address payable public ABACUS; string public WRAP_ECO_SYMBOL; string public ECO; string public ETH_SYMBOL; string public WRAP_ETH_SYMBOL; uint public swapFee; uint public rewardFee; uint public tradeFee; uint public CDSpercent; string [] rtokenlist; string [] wtokenlist; mapping (string => uint) public rcurrencyID; mapping (string => uint) public wcurrencyID; mapping (address => bool) public isRegistrar; mapping (address => bool) public isUserLocked; mapping (string => uint ) public ownerFeeVault; mapping (string => uint) public slabRateDeposit; mapping (address => bool) public friendlyaddress; mapping (address => address) public SponsorAddress; mapping (address => uint) public usertreasuryearnings; event OrderCreated( address userAddress, uint duration, uint yield, uint amount, string token ); event Swap( address userAddress, string from, string to, uint amount ); event Borrowed( uint64 orderId, address borrower, uint amount, uint duration ); event Deposit( address userAddress, string token, uint tokenAmount, uint collateralValue ); event DuePaid( uint64 orderId, address borrower, uint amount ); event WrapTokenCreated( address TokenAddress, string TokenName, string TokenSymbol, uint Decimals ); receive() payable external { } function initializeAddress(address payable _owner) public initializer { friendlyaddress[_owner] = true; owner = _owner; } function addRealCurrency(string memory rtoken) public{ require(friendlyaddress[msg.sender],"Not Friendly Address"); if(rcurrencyID[rtoken] == 0) { rtokenlist.push(rtoken); rcurrencyID[rtoken] = rtokenlist.length; } } function addWrapCurrency (string memory wtoken) public{ require(friendlyaddress[msg.sender],"Not Friendly Address"); if(wcurrencyID[wtoken] == 0) { wtokenlist.push(wtoken); wcurrencyID[wtoken] = wtokenlist.length; } } function setSlabRate(string memory WToken, uint rate) public { require(friendlyaddress[msg.sender],"Not Friendly Address"); slabRateDeposit[WToken] = rate; } function setUserLocked(address userAddress, bool value) public { require(friendlyaddress[msg.sender],"Not Friendly Address"); isUserLocked[userAddress] = value; } function setFriendlyAddress(address Address) public { (msg.sender == owner,"not owner"); friendlyaddress[Address] = true; } function addRegistrar(address _registrar) public{ require(friendlyaddress[msg.sender],"Not Friendly Address"); isRegistrar[_registrar] = true; } function setOwnerFeeVault(string memory add,uint value) public { require(friendlyaddress[msg.sender],"Not Friendly Address"); ownerFeeVault[add] += value; } function emitOrderCreated(address userAddress, uint _duration, uint _yield, uint newAmount,string memory _tokenSymbol) public { require(friendlyaddress[msg.sender],"Not Friendly Address"); emit OrderCreated(userAddress,_duration,_yield,newAmount,_tokenSymbol); } function emitSwap(address msgSender, string memory from, string memory to,uint _amount) public { require(friendlyaddress[msg.sender],"Not Friendly Address"); emit Swap(msgSender,from,to,_amount); } function emitBorrowed(uint64 _orderId, address msgSender, uint _amount,uint _duration) public { require(friendlyaddress[msg.sender],"Not Friendly Address"); emit Borrowed(_orderId,msgSender,_amount,_duration); } function emitWrappedCreated(address tokenAddress,string memory name, string memory symbol,uint8 decimals) public { require(friendlyaddress[msg.sender],"Not Friendly Address"); emit WrapTokenCreated(tokenAddress,name,symbol,decimals); } function emitDeposit(address msgSender, string memory _tokenSymbol, uint amount, uint tokenUsdValue) public { require(friendlyaddress[msg.sender],"Not Friendly Address"); emit Deposit(msgSender,_tokenSymbol,amount,tokenUsdValue); } function emitDuePaid(uint64 _orderId, address msgSender, uint due) public { require(friendlyaddress[msg.sender],"Not Friendly Address"); emit DuePaid(_orderId,msgSender,due); } function setCONSTSYMBOLS(string[4] memory _symbolCONST) public { require(friendlyaddress[msg.sender],"Not Friendly Address"); WRAP_ECO_SYMBOL = _symbolCONST[0]; ECO = _symbolCONST[1]; ETH_SYMBOL = _symbolCONST[2]; WRAP_ETH_SYMBOL = _symbolCONST[3]; } function updateFees(uint _swapFee,uint _tradeFee,uint _rewardFee) public{ require(friendlyaddress[msg.sender],"Not Friendly Address"); (swapFee,tradeFee,rewardFee) = (_swapFee,_tradeFee,_rewardFee); } function setCSDpercent(uint percent) public { require(friendlyaddress[msg.sender],"Not Friendly Address"); CDSpercent = percent; } function changeAbacusaddress(address payable Abacusaddress) public{ require(msg.sender == owner,"not owner"); ABACUS = Abacusaddress; } function changeEcoceliumaddress(address payable Ecocelium) public{ require(msg.sender == owner,"not owner"); ECOCELIUM = Ecocelium; } function changeDMaddress(address payable DMAddress) public{ require(msg.sender == owner,"not owner"); DATAMANAGER = DMAddress; } function changeMMaddress(address payable MMaddress) public{ require(msg.sender == owner,"not owner"); MONEYMANAGER = MMaddress; } function changeOwner(address payable _owner) public{ require(msg.sender==owner); owner = _owner; } function setSponsor(address userAddress, address _sponsorAddress) external { require(friendlyaddress[msg.sender],"Not Friendly Address"); SponsorAddress[userAddress] = _sponsorAddress; } function updateTreasuryEarnings(address userAddress, uint _amount) public { require(friendlyaddress[msg.sender],"Not Friendly Address"); usertreasuryearnings[userAddress] = _amount; } } contract EcoMoneyManager is Initializable { EcoceliumInit Init; address public owner; address [] public TokenAddresses; address [] public wTokenAddresses; mapping (string => address) rTokens; mapping (string => string) public wtormap; mapping (string => string) public rTokensTowToken; mapping (string => TokenConfig) wTokens; mapping (address => uint) public ecoWithdrawls; mapping (string => uint) public WGains; mapping (string => uint) public WLoss; receive() payable external { } struct TokenConfig{ address tokenAddress; uint64 fetchId; } function initialize(address _owner, address payable _Init) public initializer{ owner = _owner; Init = EcoceliumInit(_Init); } function updateAdminAddress(address adminAddress) public { require(msg.sender == owner); for(uint i = 0;i<wTokenAddresses.length;i++){ wERC20(wTokenAddresses[i]).changeAdmin(adminAddress); } } function addTokenWithAddress(address tokenAddress) public { require(msg.sender == owner); ERC20Basic token = ERC20Basic(tokenAddress); require(getrTokenAddress(token.symbol())== address(0),"token exist"); rTokens[token.symbol()] = tokenAddress; TokenAddresses.push(tokenAddress); } function createWrapToken(string memory name,string memory symbol,uint64 _fetchId, uint8 decimal, string memory wrapOf) public returns(address TokenAddress){ require(msg.sender == owner); wERC20 token = new wERC20(name,symbol,decimal, address(this), address(this)); rTokensTowToken[wrapOf] = symbol; TokenAddresses.push(address(token)); wTokenAddresses.push(address(token)); wTokens[symbol] = TokenConfig({ tokenAddress:address(token), fetchId : _fetchId }); Init.emitWrappedCreated(address(token),name,symbol,token.decimals()); return address(token); } function changeOwner(address _owner) public{ require(owner == msg.sender); owner =_owner; } function updatertoken (string memory WToken, string memory RToken) public { require(Init.friendlyaddress(msg.sender),"Not Friendly Address"); wtormap[WToken] = RToken; } function getwTokenAddress(string memory symbol) public view returns(address){ return wTokens[symbol].tokenAddress; } function getFetchId(string memory symbol ) public view returns(uint64){ if( wTokens[symbol].tokenAddress == address(0)) { symbol = rTokensTowToken[symbol]; } return wTokens[symbol].fetchId; } function getrTokenAddress(string memory symbol) public view returns(address){ return rTokens[symbol]; } function getTokenAddresses() public view returns(address[] memory){ return TokenAddresses; } function getWrapped(string memory symbol) public view returns(string memory){ return rTokensTowToken[symbol]; } function getTokenID(string memory symbol) public view returns(uint){ for(uint i=0; i< TokenAddresses.length; i++) { if(TokenAddresses[i] == wTokens[symbol].tokenAddress) { return i; } } } function releaseWrappedToken (address _userAddress, uint amount, string memory WToken) public { require(Init.friendlyaddress(msg.sender),"Not Friendly Address"); wERC20(getwTokenAddress(WToken)).release(_userAddress,amount); } function mintWrappedToken (address _userAddress, uint amount, string memory WToken) public { require(Init.friendlyaddress(msg.sender),"Not Friendly Address"); wERC20(getwTokenAddress(WToken)).mint(_userAddress,amount); } function lockWrappedToken (address _userAddress, uint amount, string memory WToken) public { require(Init.friendlyaddress(msg.sender),"Not Friendly Address"); wERC20(getwTokenAddress(WToken)).lock(_userAddress,amount); } function burnWrappedFrom(address userAddress, uint amount, string memory WToken) public { require(Init.friendlyaddress(msg.sender),"Not Friendly Address"); wERC20(getwTokenAddress(WToken)).burnFrom(userAddress,amount); } function mintECO(address userAddress, uint amount) public { require(Init.friendlyaddress(msg.sender),"Not Friendly Address"); wERC20(getwTokenAddress(Init.WRAP_ECO_SYMBOL())).mint(userAddress,amount); } function lockECO(address userAddress, uint amount) public { require(Init.friendlyaddress(msg.sender),"Not Friendly Address"); wERC20(getwTokenAddress(Init.WRAP_ECO_SYMBOL())).lock(userAddress,amount); } function releaseECO(address userAddress, uint amount) public { require(Init.friendlyaddress(msg.sender),"Not Friendly Address"); wERC20(getwTokenAddress(Init.WRAP_ECO_SYMBOL())).release(userAddress,amount); } function burnECOFrom(address userAddress, uint amount) public { require(Init.friendlyaddress(msg.sender),"Not Friendly Address"); wERC20(getwTokenAddress(Init.WRAP_ECO_SYMBOL())).burnFrom(userAddress,amount); } function DepositManager(string memory _rtoken, uint amount, address userAddress) public payable { require(Init.friendlyaddress(msg.sender),"Not Friendly Address"); if(Init.rcurrencyID(_rtoken) == Init.rcurrencyID(Init.ETH_SYMBOL())) { require(msg.value >= amount,"Invalid Amount"); } else {ERC20Basic rtoken = ERC20Basic(getrTokenAddress(_rtoken)); require(rtoken.allowance(userAddress, address(this)) >= amount,"set allowance"); rtoken.transferFrom(userAddress,address(this),amount);} } function WithdrawManager(string memory _rtoken, uint amount, address payable userAddress) public { require(Init.friendlyaddress(msg.sender),"Not Friendly Address"); if(Init.rcurrencyID(_rtoken) == Init.rcurrencyID(Init.ETH_SYMBOL())) { userAddress.transfer(amount); } else { ERC20Basic rtoken = ERC20Basic(getrTokenAddress(_rtoken)); rtoken.transfer(userAddress,amount);} } function redeemEcoEarning(address payable userAddress, uint amount) public { require(Init.friendlyaddress(msg.sender),"Not Friendly Address"); ecoWithdrawls[userAddress] = ecoWithdrawls[userAddress] + amount; WithdrawManager(Init.ECO(), amount, userAddress); } function adjustEcoEarning(address userAddress, uint amount) public { require(Init.friendlyaddress(msg.sender),"Not Friendly Address"); ecoWithdrawls[userAddress] = ecoWithdrawls[userAddress] - amount; } function updateFetchID (string memory wtoken, uint64 _fetchID) external { require(owner == msg.sender); wTokens[wtoken].fetchId = _fetchID; } function w2wswap (address msgSender, string memory token1, uint token1amount, uint token2amount, string memory token2) external { require(Init.friendlyaddress(msg.sender),"Not Friendly Address"); releaseWrappedToken(msgSender, token1amount, token1); burnWrappedFrom(msgSender,token1amount,token1); WGains[token1]=token1amount; mintWrappedToken(msgSender,token2amount, token2); lockWrappedToken(msgSender, token2amount, token2); WLoss[token2]=token2amount; } function updateWrapAddress (string memory wtoken, address wAddress) external { require(owner == msg.sender); wTokens[wtoken].tokenAddress = wAddress; } function updatewtoken (string memory RToken, string memory WToken) public { require(Init.friendlyaddress(msg.sender),"Not Friendly Address"); rTokensTowToken[RToken] = WToken; } }

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{"success": true, "error": null, "results": {"detectors": [{"check": "divide-before-multiply", "impact": "Medium", "confidence": "Medium"}, {"check": "reentrancy-no-eth", "impact": "Medium", "confidence": "Medium"}, {"check": "erc20-interface", "impact": "Medium", "confidence": "High"}, {"check": "arbitrary-send", "impact": "High", "confidence": "Medium"}, {"check": "incorrect-equality", "impact": "Medium", "confidence": "High"}, {"check": "uninitialized-local", "impact": "Medium", "confidence": "Medium"}, {"check": "reentrancy-eth", "impact": "High", "confidence": "Medium"}, {"check": "unused-return", "impact": "Medium", "confidence": "Medium"}, {"check": "locked-ether", "impact": "Medium", "confidence": "High"}]}}

0x89f11af4b6c3cbcb4c55f9033fb403483b6430b7

pragma solidity 0.6.10; pragma experimental ABIEncoderV2; library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // According to EIP-1052, 0x0 is the value returned for not-yet created accounts // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned // for accounts without code, i.e. `keccak256('')` bytes32 codehash; bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470; // solhint-disable-next-line no-inline-assembly assembly { codehash := extcodehash(account) } return (codehash != accountHash && codehash != 0x0); } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } } library BokkyPooBahsDateTimeLibrary { uint constant SECONDS_PER_DAY = 24 * 60 * 60; uint constant SECONDS_PER_HOUR = 60 * 60; uint constant SECONDS_PER_MINUTE = 60; int constant OFFSET19700101 = 2440588; uint constant DOW_MON = 1; uint constant DOW_TUE = 2; uint constant DOW_WED = 3; uint constant DOW_THU = 4; uint constant DOW_FRI = 5; uint constant DOW_SAT = 6; uint constant DOW_SUN = 7; // ------------------------------------------------------------------------ // Calculate the number of days from 1970/01/01 to year/month/day using // the date conversion algorithm from // http://aa.usno.navy.mil/faq/docs/JD_Formula.php // and subtracting the offset 2440588 so that 1970/01/01 is day 0 // // days = day // - 32075 // + 1461 * (year + 4800 + (month - 14) / 12) / 4 // + 367 * (month - 2 - (month - 14) / 12 * 12) / 12 // - 3 * ((year + 4900 + (month - 14) / 12) / 100) / 4 // - offset // ------------------------------------------------------------------------ function _daysFromDate(uint year, uint month, uint day) internal pure returns (uint _days) { require(year >= 1970); int _year = int(year); int _month = int(month); int _day = int(day); int __days = _day - 32075 + 1461 * (_year + 4800 + (_month - 14) / 12) / 4 + 367 * (_month - 2 - (_month - 14) / 12 * 12) / 12 - 3 * ((_year + 4900 + (_month - 14) / 12) / 100) / 4 - OFFSET19700101; _days = uint(__days); } // ------------------------------------------------------------------------ // Calculate year/month/day from the number of days since 1970/01/01 using // the date conversion algorithm from // http://aa.usno.navy.mil/faq/docs/JD_Formula.php // and adding the offset 2440588 so that 1970/01/01 is day 0 // // int L = days + 68569 + offset // int N = 4 * L / 146097 // L = L - (146097 * N + 3) / 4 // year = 4000 * (L + 1) / 1461001 // L = L - 1461 * year / 4 + 31 // month = 80 * L / 2447 // dd = L - 2447 * month / 80 // L = month / 11 // month = month + 2 - 12 * L // year = 100 * (N - 49) + year + L // ------------------------------------------------------------------------ function _daysToDate(uint _days) internal pure returns (uint year, uint month, uint day) { int __days = int(_days); int L = __days + 68569 + OFFSET19700101; int N = 4 * L / 146097; L = L - (146097 * N + 3) / 4; int _year = 4000 * (L + 1) / 1461001; L = L - 1461 * _year / 4 + 31; int _month = 80 * L / 2447; int _day = L - 2447 * _month / 80; L = _month / 11; _month = _month + 2 - 12 * L; _year = 100 * (N - 49) + _year + L; year = uint(_year); month = uint(_month); day = uint(_day); } function timestampFromDate(uint year, uint month, uint day) internal pure returns (uint timestamp) { timestamp = _daysFromDate(year, month, day) * SECONDS_PER_DAY; } function timestampFromDateTime(uint year, uint month, uint day, uint hour, uint minute, uint second) internal pure returns (uint timestamp) { timestamp = _daysFromDate(year, month, day) * SECONDS_PER_DAY + hour * SECONDS_PER_HOUR + minute * SECONDS_PER_MINUTE + second; } function timestampToDate(uint timestamp) internal pure returns (uint year, uint month, uint day) { (year, month, day) = _daysToDate(timestamp / SECONDS_PER_DAY); } function timestampToDateTime(uint timestamp) internal pure returns (uint year, uint month, uint day, uint hour, uint minute, uint second) { (year, month, day) = _daysToDate(timestamp / SECONDS_PER_DAY); uint secs = timestamp % SECONDS_PER_DAY; hour = secs / SECONDS_PER_HOUR; secs = secs % SECONDS_PER_HOUR; minute = secs / SECONDS_PER_MINUTE; second = secs % SECONDS_PER_MINUTE; } function isValidDate(uint year, uint month, uint day) internal pure returns (bool valid) { if (year >= 1970 && month > 0 && month <= 12) { uint daysInMonth = _getDaysInMonth(year, month); if (day > 0 && day <= daysInMonth) { valid = true; } } } function isValidDateTime(uint year, uint month, uint day, uint hour, uint minute, uint second) internal pure returns (bool valid) { if (isValidDate(year, month, day)) { if (hour < 24 && minute < 60 && second < 60) { valid = true; } } } function isLeapYear(uint timestamp) internal pure returns (bool leapYear) { uint year; uint month; uint day; (year, month, day) = _daysToDate(timestamp / SECONDS_PER_DAY); leapYear = _isLeapYear(year); } function _isLeapYear(uint year) internal pure returns (bool leapYear) { leapYear = ((year % 4 == 0) && (year % 100 != 0)) || (year % 400 == 0); } function isWeekDay(uint timestamp) internal pure returns (bool weekDay) { weekDay = getDayOfWeek(timestamp) <= DOW_FRI; } function isWeekEnd(uint timestamp) internal pure returns (bool weekEnd) { weekEnd = getDayOfWeek(timestamp) >= DOW_SAT; } function getDaysInMonth(uint timestamp) internal pure returns (uint daysInMonth) { uint year; uint month; uint day; (year, month, day) = _daysToDate(timestamp / SECONDS_PER_DAY); daysInMonth = _getDaysInMonth(year, month); } function _getDaysInMonth(uint year, uint month) internal pure returns (uint daysInMonth) { if (month == 1 || month == 3 || month == 5 || month == 7 || month == 8 || month == 10 || month == 12) { daysInMonth = 31; } else if (month != 2) { daysInMonth = 30; } else { daysInMonth = _isLeapYear(year) ? 29 : 28; } } // 1 = Monday, 7 = Sunday function getDayOfWeek(uint timestamp) internal pure returns (uint dayOfWeek) { uint _days = timestamp / SECONDS_PER_DAY; dayOfWeek = (_days + 3) % 7 + 1; } function getYear(uint timestamp) internal pure returns (uint year) { uint month; uint day; (year, month, day) = _daysToDate(timestamp / SECONDS_PER_DAY); } function getMonth(uint timestamp) internal pure returns (uint month) { uint year; uint day; (year, month, day) = _daysToDate(timestamp / SECONDS_PER_DAY); } function getDay(uint timestamp) internal pure returns (uint day) { uint year; uint month; (year, month, day) = _daysToDate(timestamp / SECONDS_PER_DAY); } function getHour(uint timestamp) internal pure returns (uint hour) { uint secs = timestamp % SECONDS_PER_DAY; hour = secs / SECONDS_PER_HOUR; } function getMinute(uint timestamp) internal pure returns (uint minute) { uint secs = timestamp % SECONDS_PER_HOUR; minute = secs / SECONDS_PER_MINUTE; } function getSecond(uint timestamp) internal pure returns (uint second) { second = timestamp % SECONDS_PER_MINUTE; } function addYears(uint timestamp, uint _years) internal pure returns (uint newTimestamp) { uint year; uint month; uint day; (year, month, day) = _daysToDate(timestamp / SECONDS_PER_DAY); year += _years; uint daysInMonth = _getDaysInMonth(year, month); if (day > daysInMonth) { day = daysInMonth; } newTimestamp = _daysFromDate(year, month, day) * SECONDS_PER_DAY + timestamp % SECONDS_PER_DAY; require(newTimestamp >= timestamp); } function addMonths(uint timestamp, uint _months) internal pure returns (uint newTimestamp) { uint year; uint month; uint day; (year, month, day) = _daysToDate(timestamp / SECONDS_PER_DAY); month += _months; year += (month - 1) / 12; month = (month - 1) % 12 + 1; uint daysInMonth = _getDaysInMonth(year, month); if (day > daysInMonth) { day = daysInMonth; } newTimestamp = _daysFromDate(year, month, day) * SECONDS_PER_DAY + timestamp % SECONDS_PER_DAY; require(newTimestamp >= timestamp); } function addDays(uint timestamp, uint _days) internal pure returns (uint newTimestamp) { newTimestamp = timestamp + _days * SECONDS_PER_DAY; require(newTimestamp >= timestamp); } function addHours(uint timestamp, uint _hours) internal pure returns (uint newTimestamp) { newTimestamp = timestamp + _hours * SECONDS_PER_HOUR; require(newTimestamp >= timestamp); } function addMinutes(uint timestamp, uint _minutes) internal pure returns (uint newTimestamp) { newTimestamp = timestamp + _minutes * SECONDS_PER_MINUTE; require(newTimestamp >= timestamp); } function addSeconds(uint timestamp, uint _seconds) internal pure returns (uint newTimestamp) { newTimestamp = timestamp + _seconds; require(newTimestamp >= timestamp); } function subYears(uint timestamp, uint _years) internal pure returns (uint newTimestamp) { uint year; uint month; uint day; (year, month, day) = _daysToDate(timestamp / SECONDS_PER_DAY); year -= _years; uint daysInMonth = _getDaysInMonth(year, month); if (day > daysInMonth) { day = daysInMonth; } newTimestamp = _daysFromDate(year, month, day) * SECONDS_PER_DAY + timestamp % SECONDS_PER_DAY; require(newTimestamp <= timestamp); } function subMonths(uint timestamp, uint _months) internal pure returns (uint newTimestamp) { uint year; uint month; uint day; (year, month, day) = _daysToDate(timestamp / SECONDS_PER_DAY); uint yearMonth = year * 12 + (month - 1) - _months; year = yearMonth / 12; month = yearMonth % 12 + 1; uint daysInMonth = _getDaysInMonth(year, month); if (day > daysInMonth) { day = daysInMonth; } newTimestamp = _daysFromDate(year, month, day) * SECONDS_PER_DAY + timestamp % SECONDS_PER_DAY; require(newTimestamp <= timestamp); } function subDays(uint timestamp, uint _days) internal pure returns (uint newTimestamp) { newTimestamp = timestamp - _days * SECONDS_PER_DAY; require(newTimestamp <= timestamp); } function subHours(uint timestamp, uint _hours) internal pure returns (uint newTimestamp) { newTimestamp = timestamp - _hours * SECONDS_PER_HOUR; require(newTimestamp <= timestamp); } function subMinutes(uint timestamp, uint _minutes) internal pure returns (uint newTimestamp) { newTimestamp = timestamp - _minutes * SECONDS_PER_MINUTE; require(newTimestamp <= timestamp); } function subSeconds(uint timestamp, uint _seconds) internal pure returns (uint newTimestamp) { newTimestamp = timestamp - _seconds; require(newTimestamp <= timestamp); } function diffYears(uint fromTimestamp, uint toTimestamp) internal pure returns (uint _years) { require(fromTimestamp <= toTimestamp); uint fromYear; uint fromMonth; uint fromDay; uint toYear; uint toMonth; uint toDay; (fromYear, fromMonth, fromDay) = _daysToDate(fromTimestamp / SECONDS_PER_DAY); (toYear, toMonth, toDay) = _daysToDate(toTimestamp / SECONDS_PER_DAY); _years = toYear - fromYear; } function diffMonths(uint fromTimestamp, uint toTimestamp) internal pure returns (uint _months) { require(fromTimestamp <= toTimestamp); uint fromYear; uint fromMonth; uint fromDay; uint toYear; uint toMonth; uint toDay; (fromYear, fromMonth, fromDay) = _daysToDate(fromTimestamp / SECONDS_PER_DAY); (toYear, toMonth, toDay) = _daysToDate(toTimestamp / SECONDS_PER_DAY); _months = toYear * 12 + toMonth - fromYear * 12 - fromMonth; } function diffDays(uint fromTimestamp, uint toTimestamp) internal pure returns (uint _days) { require(fromTimestamp <= toTimestamp); _days = (toTimestamp - fromTimestamp) / SECONDS_PER_DAY; } function diffHours(uint fromTimestamp, uint toTimestamp) internal pure returns (uint _hours) { require(fromTimestamp <= toTimestamp); _hours = (toTimestamp - fromTimestamp) / SECONDS_PER_HOUR; } function diffMinutes(uint fromTimestamp, uint toTimestamp) internal pure returns (uint _minutes) { require(fromTimestamp <= toTimestamp); _minutes = (toTimestamp - fromTimestamp) / SECONDS_PER_MINUTE; } function diffSeconds(uint fromTimestamp, uint toTimestamp) internal pure returns (uint _seconds) { require(fromTimestamp <= toTimestamp); _seconds = toTimestamp - fromTimestamp; } } contract Decryption { function encrypt(uint256 secretNumber, bytes32 key) external pure returns (bytes32 ciphertext) { return bytes32(secretNumber) ^ key; } function decrypt(bytes32 ciphertext, bytes32 key) external pure returns (uint256 secretNumber) { return uint256(ciphertext ^ key); } } contract ECDH { using SafeMath for uint256; uint256 constant private _GX = 0x79BE667EF9DCBBAC55A06295CE870B07029BFCDB2DCE28D959F2815B16F81798; uint256 constant private _GY = 0x483ADA7726A3C4655DA4FBFC0E1108A8FD17B448A68554199C47D08FFB10D4B8; uint256 constant private _N = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC2F; uint256 constant private _A = 0; function publicKey(uint256 privKey) external pure returns (uint256 qx, uint256 qy) { uint256 x; uint256 y; uint256 z; (x, y, z) = ecMul( privKey, _GX, _GY, 1 ); z = inverse(z); qx = mulmod(x, z, _N); qy = mulmod(y, z, _N); } function deriveKey( uint256 privKey, uint256 pubX, uint256 pubY ) external pure returns (uint256 qx, uint256 qy) { uint256 x; uint256 y; uint256 z; (x, y, z) = ecMul( privKey, pubX, pubY, 1 ); z = inverse(z); qx = mulmod(x, z, _N); qy = mulmod(y, z, _N); } function jAdd( uint256 x1, uint256 z1, uint256 x2, uint256 z2 ) public pure returns (uint256 x3, uint256 z3) { (x3, z3) = (addmod(mulmod(z2, x1, _N), mulmod(x2, z1, _N), _N), mulmod(z1, z2, _N)); } function jSub( uint256 x1, uint256 z1, uint256 x2, uint256 z2 ) public pure returns (uint256 x3, uint256 z3) { (x3, z3) = (addmod(mulmod(z2, x1, _N), mulmod(_N.sub(x2), z1, _N), _N), mulmod(z1, z2, _N)); } function jMul( uint256 x1, uint256 z1, uint256 x2, uint256 z2 ) public pure returns (uint256 x3, uint256 z3) { (x3, z3) = (mulmod(x1, x2, _N), mulmod(z1, z2, _N)); } function jDiv( uint256 x1, uint256 z1, uint256 x2, uint256 z2 ) public pure returns (uint256 x3, uint256 z3) { (x3, z3) = (mulmod(x1, z2, _N), mulmod(z1, x2, _N)); } function inverse(uint256 a) public pure returns (uint256 invA) { uint256 t = 0; uint256 newT = 1; uint256 r = _N; uint256 newR = a; uint256 q; while (newR != 0) { q = r.div(newR); (t, newT) = (newT, addmod(t, (_N.sub(mulmod(q, newT, _N))), _N)); (r, newR) = (newR, r % newR); } return t; } function ecAdd( uint256 x1, uint256 y1, uint256 z1, uint256 x2, uint256 y2, uint256 z2 ) public pure returns (uint256 x3, uint256 y3, uint256 z3) { uint256 ln; uint256 lz; uint256 da; uint256 db; if ((x1 == 0) && (y1 == 0)) { return (x2, y2, z2); } if ((x2 == 0) && (y2 == 0)) { return (x1, y1, z1); } if ((x1 == x2) && (y1 == y2)) { (ln, lz) = jMul(x1, z1, x1, z1); (ln, lz) = jMul(ln,lz,3,1); (ln, lz) = jAdd(ln,lz,_A,1); (da, db) = jMul(y1,z1,2,1); } else { (ln, lz) = jSub(y2,z2,y1,z1); (da, db) = jSub(x2,z2,x1,z1); } (ln, lz) = jDiv(ln,lz,da,db); (x3, da) = jMul(ln,lz,ln,lz); (x3, da) = jSub(x3,da,x1,z1); (x3, da) = jSub(x3,da,x2,z2); (y3, db) = jSub(x1,z1,x3,da); (y3, db) = jMul(y3,db,ln,lz); (y3, db) = jSub(y3,db,y1,z1); if (da != db) { x3 = mulmod(x3, db, _N); y3 = mulmod(y3, da, _N); z3 = mulmod(da, db, _N); } else { z3 = da; } } function ecDouble( uint256 x1, uint256 y1, uint256 z1 ) public pure returns (uint256 x3, uint256 y3, uint256 z3) { (x3, y3, z3) = ecAdd( x1, y1, z1, x1, y1, z1 ); } function ecMul( uint256 d, uint256 x1, uint256 y1, uint256 z1 ) public pure returns (uint256 x3, uint256 y3, uint256 z3) { uint256 remaining = d; uint256 px = x1; uint256 py = y1; uint256 pz = z1; uint256 acx = 0; uint256 acy = 0; uint256 acz = 1; if (d == 0) { return (0, 0, 1); } while (remaining != 0) { if ((remaining & 1) != 0) { (acx, acy, acz) = ecAdd( acx, acy, acz, px, py, pz ); } remaining = remaining.div(2); (px, py, pz) = ecDouble(px, py, pz); } (x3, y3, z3) = (acx, acy, acz); } } library ECDSA { /** * @dev Returns the address that signed a hashed message (`hash`) with * `signature`. This address can then be used for verification purposes. * * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures: * this function rejects them by requiring the `s` value to be in the lower * half order, and the `v` value to be either 27 or 28. * * IMPORTANT: `hash` _must_ be the result of a hash operation for the * verification to be secure: it is possible to craft signatures that * recover to arbitrary addresses for non-hashed data. A safe way to ensure * this is by receiving a hash of the original message (which may otherwise * be too long), and then calling {toEthSignedMessageHash} on it. */ function recover(bytes32 hash, bytes memory signature) internal pure returns (address) { // Check the signature length if (signature.length != 65) { revert("ECDSA: invalid signature length"); } // Divide the signature in r, s and v variables bytes32 r; bytes32 s; uint8 v; // ecrecover takes the signature parameters, and the only way to get them // currently is to use assembly. // solhint-disable-next-line no-inline-assembly assembly { r := mload(add(signature, 0x20)) s := mload(add(signature, 0x40)) v := byte(0, mload(add(signature, 0x60))) } // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines // the valid range for s in (281): 0 < s < secp256k1n ÷ 2 + 1, and for v in (282): v ∈ {27, 28}. Most // signatures from current libraries generate a unique signature with an s-value in the lower half order. // // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept // these malleable signatures as well. if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) { revert("ECDSA: invalid signature 's' value"); } if (v != 27 && v != 28) { revert("ECDSA: invalid signature 'v' value"); } // If the signature is valid (and not malleable), return the signer address address signer = ecrecover(hash, v, r, s); require(signer != address(0), "ECDSA: invalid signature"); return signer; } /** * @dev Returns an Ethereum Signed Message, created from a `hash`. This * replicates the behavior of the * https://github.com/ethereum/wiki/wiki/JSON-RPC#eth_sign[`eth_sign`] * JSON-RPC method. * * See {recover}. */ function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) { // 32 is the length in bytes of hash, // enforced by the type signature above return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash)); } } library EnumerableSet { // To implement this library for multiple types with as little code // repetition as possible, we write it in terms of a generic Set type with // bytes32 values. // The Set implementation uses private functions, and user-facing // implementations (such as AddressSet) are just wrappers around the // underlying Set. // This means that we can only create new EnumerableSets for types that fit // in bytes32. struct Set { // Storage of set values bytes32[] _values; // Position of the value in the `values` array, plus 1 because index 0 // means a value is not in the set. mapping (bytes32 => uint256) _indexes; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function _add(Set storage set, bytes32 value) private returns (bool) { if (!_contains(set, value)) { set._values.push(value); // The value is stored at length-1, but we add 1 to all indexes // and use 0 as a sentinel value set._indexes[value] = set._values.length; return true; } else { return false; } } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function _remove(Set storage set, bytes32 value) private returns (bool) { // We read and store the value's index to prevent multiple reads from the same storage slot uint256 valueIndex = set._indexes[value]; if (valueIndex != 0) { // Equivalent to contains(set, value) // To delete an element from the _values array in O(1), we swap the element to delete with the last one in // the array, and then remove the last element (sometimes called as 'swap and pop'). // This modifies the order of the array, as noted in {at}. uint256 toDeleteIndex = valueIndex - 1; uint256 lastIndex = set._values.length - 1; // When the value to delete is the last one, the swap operation is unnecessary. However, since this occurs // so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement. bytes32 lastvalue = set._values[lastIndex]; // Move the last value to the index where the value to delete is set._values[toDeleteIndex] = lastvalue; // Update the index for the moved value set._indexes[lastvalue] = toDeleteIndex + 1; // All indexes are 1-based // Delete the slot where the moved value was stored set._values.pop(); // Delete the index for the deleted slot delete set._indexes[value]; return true; } else { return false; } } /** * @dev Returns true if the value is in the set. O(1). */ function _contains(Set storage set, bytes32 value) private view returns (bool) { return set._indexes[value] != 0; } /** * @dev Returns the number of values on the set. O(1). */ function _length(Set storage set) private view returns (uint256) { return set._values.length; } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function _at(Set storage set, uint256 index) private view returns (bytes32) { require(set._values.length > index, "EnumerableSet: index out of bounds"); return set._values[index]; } // AddressSet struct AddressSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(AddressSet storage set, address value) internal returns (bool) { return _add(set._inner, bytes32(uint256(value))); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(AddressSet storage set, address value) internal returns (bool) { return _remove(set._inner, bytes32(uint256(value))); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(AddressSet storage set, address value) internal view returns (bool) { return _contains(set._inner, bytes32(uint256(value))); } /** * @dev Returns the number of values in the set. O(1). */ function length(AddressSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(AddressSet storage set, uint256 index) internal view returns (address) { return address(uint256(_at(set._inner, index))); } // UintSet struct UintSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(UintSet storage set, uint256 value) internal returns (bool) { return _add(set._inner, bytes32(value)); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(UintSet storage set, uint256 value) internal returns (bool) { return _remove(set._inner, bytes32(value)); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(UintSet storage set, uint256 value) internal view returns (bool) { return _contains(set._inner, bytes32(value)); } /** * @dev Returns the number of values on the set. O(1). */ function length(UintSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(UintSet storage set, uint256 index) internal view returns (uint256) { return uint256(_at(set._inner, index)); } } library Fp2Operations { using SafeMath for uint; struct Fp2Point { uint a; uint b; } uint constant public P = 21888242871839275222246405745257275088696311157297823662689037894645226208583; function addFp2(Fp2Point memory value1, Fp2Point memory value2) internal pure returns (Fp2Point memory) { return Fp2Point({ a: addmod(value1.a, value2.a, P), b: addmod(value1.b, value2.b, P) }); } function scalarMulFp2(Fp2Point memory value, uint scalar) internal pure returns (Fp2Point memory) { return Fp2Point({ a: mulmod(scalar, value.a, P), b: mulmod(scalar, value.b, P) }); } function minusFp2(Fp2Point memory diminished, Fp2Point memory subtracted) internal pure returns (Fp2Point memory difference) { uint p = P; if (diminished.a >= subtracted.a) { difference.a = addmod(diminished.a, p - (subtracted.a), p); } else { difference.a = p - (addmod(subtracted.a, p - (diminished.a), p)); } if (diminished.b >= subtracted.b) { difference.b = addmod(diminished.b, p - (subtracted.b), p); } else { difference.b = p - (addmod(subtracted.b, p - (diminished.b), p)); } } function mulFp2( Fp2Point memory value1, Fp2Point memory value2 ) internal pure returns (Fp2Point memory result) { uint p = P; Fp2Point memory point = Fp2Point({ a: mulmod(value1.a, value2.a, p), b: mulmod(value1.b, value2.b, p)}); result.a = addmod( point.a, mulmod(p - 1, point.b, p), p); result.b = addmod( mulmod( addmod(value1.a, value1.b, p), addmod(value2.a, value2.b, p), p), p - addmod(point.a, point.b, p), p); } function squaredFp2(Fp2Point memory value) internal pure returns (Fp2Point memory) { uint p = P; uint ab = mulmod(value.a, value.b, p); uint mult = mulmod(addmod(value.a, value.b, p), addmod(value.a, mulmod(p - 1, value.b, p), p), p); return Fp2Point({ a: mult, b: addmod(ab, ab, p) }); } function inverseFp2(Fp2Point memory value) internal view returns (Fp2Point memory result) { uint p = P; uint t0 = mulmod(value.a, value.a, p); uint t1 = mulmod(value.b, value.b, p); uint t2 = mulmod(p - 1, t1, p); if (t0 >= t2) { t2 = addmod(t0, p - t2, p); } else { t2 = p - addmod(t2, p - t0, p); } uint t3 = Precompiled.bigModExp(t2, p - 2, p); result.a = mulmod(value.a, t3, p); result.b = p - mulmod(value.b, t3, p); } function isEqual( Fp2Point memory value1, Fp2Point memory value2 ) internal pure returns (bool) { return value1.a == value2.a && value1.b == value2.b; } } library G2Operations { using SafeMath for uint; using Fp2Operations for Fp2Operations.Fp2Point; struct G2Point { Fp2Operations.Fp2Point x; Fp2Operations.Fp2Point y; } function getTWISTB() internal pure returns (Fp2Operations.Fp2Point memory) { // Current solidity version does not support Constants of non-value type // so we implemented this function return Fp2Operations.Fp2Point({ a: 19485874751759354771024239261021720505790618469301721065564631296452457478373, b: 266929791119991161246907387137283842545076965332900288569378510910307636690 }); } function getG2() internal pure returns (G2Point memory) { // Current solidity version does not support Constants of non-value type // so we implemented this function return G2Point({ x: Fp2Operations.Fp2Point({ a: 10857046999023057135944570762232829481370756359578518086990519993285655852781, b: 11559732032986387107991004021392285783925812861821192530917403151452391805634 }), y: Fp2Operations.Fp2Point({ a: 8495653923123431417604973247489272438418190587263600148770280649306958101930, b: 4082367875863433681332203403145435568316851327593401208105741076214120093531 }) }); } function getG1() internal pure returns (Fp2Operations.Fp2Point memory) { // Current solidity version does not support Constants of non-value type // so we implemented this function return Fp2Operations.Fp2Point({ a: 1, b: 2 }); } function getG2Zero() internal pure returns (G2Point memory) { // Current solidity version does not support Constants of non-value type // so we implemented this function return G2Point({ x: Fp2Operations.Fp2Point({ a: 0, b: 0 }), y: Fp2Operations.Fp2Point({ a: 1, b: 0 }) }); } function isG1Point(uint x, uint y) internal pure returns (bool) { uint p = Fp2Operations.P; return mulmod(y, y, p) == addmod(mulmod(mulmod(x, x, p), x, p), 3, p); } function isG1(Fp2Operations.Fp2Point memory point) internal pure returns (bool) { return isG1Point(point.a, point.b); } function isG2Point(Fp2Operations.Fp2Point memory x, Fp2Operations.Fp2Point memory y) internal pure returns (bool) { if (isG2ZeroPoint(x, y)) { return true; } Fp2Operations.Fp2Point memory squaredY = y.squaredFp2(); Fp2Operations.Fp2Point memory res = squaredY.minusFp2( x.squaredFp2().mulFp2(x) ).minusFp2(getTWISTB()); return res.a == 0 && res.b == 0; } function isG2(G2Point memory value) internal pure returns (bool) { return isG2Point(value.x, value.y); } function isG2ZeroPoint( Fp2Operations.Fp2Point memory x, Fp2Operations.Fp2Point memory y ) internal pure returns (bool) { return x.a == 0 && x.b == 0 && y.a == 1 && y.b == 0; } function isG2Zero(G2Point memory value) internal pure returns (bool) { return value.x.a == 0 && value.x.b == 0 && value.y.a == 1 && value.y.b == 0; // return isG2ZeroPoint(value.x, value.y); } function addG2( G2Point memory value1, G2Point memory value2 ) internal view returns (G2Point memory sum) { if (isG2Zero(value1)) { return value2; } if (isG2Zero(value2)) { return value1; } if (isEqual(value1, value2)) { return doubleG2(value1); } Fp2Operations.Fp2Point memory s = value2.y.minusFp2(value1.y).mulFp2(value2.x.minusFp2(value1.x).inverseFp2()); sum.x = s.squaredFp2().minusFp2(value1.x.addFp2(value2.x)); sum.y = value1.y.addFp2(s.mulFp2(sum.x.minusFp2(value1.x))); uint p = Fp2Operations.P; sum.y.a = p - sum.y.a; sum.y.b = p - sum.y.b; } function toUS(G2Point memory value) internal pure returns (G2Point memory) { return G2Point({ x: value.x.mulFp2(Fp2Operations.Fp2Point({ a: 1, b: 0 }).squaredFp2()), y: value.y.mulFp2( Fp2Operations.Fp2Point({ a: 1, b: 0 }).mulFp2(Fp2Operations.Fp2Point({ a: 1, b: 0 }).squaredFp2()) ) }); } function isEqual( G2Point memory value1, G2Point memory value2 ) internal pure returns (bool) { return value1.x.isEqual(value2.x) && value1.y.isEqual(value2.y); } function doubleG2(G2Point memory value) internal view returns (G2Point memory result) { if (isG2Zero(value)) { return value; } else { Fp2Operations.Fp2Point memory s = value.x.squaredFp2().scalarMulFp2(3).mulFp2(value.y.scalarMulFp2(2).inverseFp2()); result.x = s.squaredFp2().minusFp2(value.x.addFp2(value.x)); result.y = value.y.addFp2(s.mulFp2(result.x.minusFp2(value.x))); uint p = Fp2Operations.P; result.y.a = p - result.y.a; result.y.b = p - result.y.b; } } function mulG2( G2Point memory value, uint scalar ) internal view returns (G2Point memory result) { uint step = scalar; result = G2Point({ x: Fp2Operations.Fp2Point({ a: 0, b: 0 }), y: Fp2Operations.Fp2Point({ a: 1, b: 0 }) }); G2Point memory tmp = value; uint gs = gasleft(); while (step > 0) { if (step % 2 == 1) { result = addG2(result, tmp); } gs = gasleft(); tmp = doubleG2(tmp); step >>= 1; } } } library FractionUtils { using SafeMath for uint; struct Fraction { uint numerator; uint denominator; } function createFraction(uint numerator, uint denominator) internal pure returns (Fraction memory) { require(denominator > 0, "Division by zero"); Fraction memory fraction = Fraction({numerator: numerator, denominator: denominator}); reduceFraction(fraction); return fraction; } function createFraction(uint value) internal pure returns (Fraction memory) { return createFraction(value, 1); } function reduceFraction(Fraction memory fraction) internal pure { uint _gcd = gcd(fraction.numerator, fraction.denominator); fraction.numerator = fraction.numerator.div(_gcd); fraction.denominator = fraction.denominator.div(_gcd); } function multiplyFraction(Fraction memory a, Fraction memory b) internal pure returns (Fraction memory) { return createFraction(a.numerator.mul(b.numerator), a.denominator.mul(b.denominator)); } function gcd(uint a, uint b) internal pure returns (uint) { uint _a = a; uint _b = b; if (_b > _a) { (_a, _b) = swap(_a, _b); } while (_b > 0) { _a = _a.mod(_b); (_a, _b) = swap (_a, _b); } return _a; } function swap(uint a, uint b) internal pure returns (uint, uint) { return (b, a); } } interface IERC1820Registry { /** * @dev Sets `newManager` as the manager for `account`. A manager of an * account is able to set interface implementers for it. * * By default, each account is its own manager. Passing a value of `0x0` in * `newManager` will reset the manager to this initial state. * * Emits a {ManagerChanged} event. * * Requirements: * * - the caller must be the current manager for `account`. */ function setManager(address account, address newManager) external; /** * @dev Returns the manager for `account`. * * See {setManager}. */ function getManager(address account) external view returns (address); /** * @dev Sets the `implementer` contract as ``account``'s implementer for * `interfaceHash`. * * `account` being the zero address is an alias for the caller's address. * The zero address can also be used in `implementer` to remove an old one. * * See {interfaceHash} to learn how these are created. * * Emits an {InterfaceImplementerSet} event. * * Requirements: * * - the caller must be the current manager for `account`. * - `interfaceHash` must not be an {IERC165} interface id (i.e. it must not * end in 28 zeroes). * - `implementer` must implement {IERC1820Implementer} and return true when * queried for support, unless `implementer` is the caller. See * {IERC1820Implementer-canImplementInterfaceForAddress}. */ function setInterfaceImplementer(address account, bytes32 interfaceHash, address implementer) external; /** * @dev Returns the implementer of `interfaceHash` for `account`. If no such * implementer is registered, returns the zero address. * * If `interfaceHash` is an {IERC165} interface id (i.e. it ends with 28 * zeroes), `account` will be queried for support of it. * * `account` being the zero address is an alias for the caller's address. */ function getInterfaceImplementer(address account, bytes32 interfaceHash) external view returns (address); /** * @dev Returns the interface hash for an `interfaceName`, as defined in the * corresponding * https://eips.ethereum.org/EIPS/eip-1820#interface-name[section of the EIP]. */ function interfaceHash(string calldata interfaceName) external pure returns (bytes32); /** * @notice Updates the cache with whether the contract implements an ERC165 interface or not. * @param account Address of the contract for which to update the cache. * @param interfaceId ERC165 interface for which to update the cache. */ function updateERC165Cache(address account, bytes4 interfaceId) external; /** * @notice Checks whether a contract implements an ERC165 interface or not. * If the result is not cached a direct lookup on the contract address is performed. * If the result is not cached or the cached value is out-of-date, the cache MUST be updated manually by calling * {updateERC165Cache} with the contract address. * @param account Address of the contract to check. * @param interfaceId ERC165 interface to check. * @return True if `account` implements `interfaceId`, false otherwise. */ function implementsERC165Interface(address account, bytes4 interfaceId) external view returns (bool); /** * @notice Checks whether a contract implements an ERC165 interface or not without using nor updating the cache. * @param account Address of the contract to check. * @param interfaceId ERC165 interface to check. * @return True if `account` implements `interfaceId`, false otherwise. */ function implementsERC165InterfaceNoCache(address account, bytes4 interfaceId) external view returns (bool); event InterfaceImplementerSet(address indexed account, bytes32 indexed interfaceHash, address indexed implementer); event ManagerChanged(address indexed account, address indexed newManager); } interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } interface IERC777 { /** * @dev Returns the name of the token. */ function name() external view returns (string memory); /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() external view returns (string memory); /** * @dev Returns the smallest part of the token that is not divisible. This * means all token operations (creation, movement and destruction) must have * amounts that are a multiple of this number. * * For most token contracts, this value will equal 1. */ function granularity() external view returns (uint256); /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by an account (`owner`). */ function balanceOf(address owner) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * If send or receive hooks are registered for the caller and `recipient`, * the corresponding functions will be called with `data` and empty * `operatorData`. See {IERC777Sender} and {IERC777Recipient}. * * Emits a {Sent} event. * * Requirements * * - the caller must have at least `amount` tokens. * - `recipient` cannot be the zero address. * - if `recipient` is a contract, it must implement the {IERC777Recipient} * interface. */ function send(address recipient, uint256 amount, bytes calldata data) external; /** * @dev Destroys `amount` tokens from the caller's account, reducing the * total supply. * * If a send hook is registered for the caller, the corresponding function * will be called with `data` and empty `operatorData`. See {IERC777Sender}. * * Emits a {Burned} event. * * Requirements * * - the caller must have at least `amount` tokens. */ function burn(uint256 amount, bytes calldata data) external; /** * @dev Returns true if an account is an operator of `tokenHolder`. * Operators can send and burn tokens on behalf of their owners. All * accounts are their own operator. * * See {operatorSend} and {operatorBurn}. */ function isOperatorFor(address operator, address tokenHolder) external view returns (bool); /** * @dev Make an account an operator of the caller. * * See {isOperatorFor}. * * Emits an {AuthorizedOperator} event. * * Requirements * * - `operator` cannot be calling address. */ function authorizeOperator(address operator) external; /** * @dev Revoke an account's operator status for the caller. * * See {isOperatorFor} and {defaultOperators}. * * Emits a {RevokedOperator} event. * * Requirements * * - `operator` cannot be calling address. */ function revokeOperator(address operator) external; /** * @dev Returns the list of default operators. These accounts are operators * for all token holders, even if {authorizeOperator} was never called on * them. * * This list is immutable, but individual holders may revoke these via * {revokeOperator}, in which case {isOperatorFor} will return false. */ function defaultOperators() external view returns (address[] memory); /** * @dev Moves `amount` tokens from `sender` to `recipient`. The caller must * be an operator of `sender`. * * If send or receive hooks are registered for `sender` and `recipient`, * the corresponding functions will be called with `data` and * `operatorData`. See {IERC777Sender} and {IERC777Recipient}. * * Emits a {Sent} event. * * Requirements * * - `sender` cannot be the zero address. * - `sender` must have at least `amount` tokens. * - the caller must be an operator for `sender`. * - `recipient` cannot be the zero address. * - if `recipient` is a contract, it must implement the {IERC777Recipient} * interface. */ function operatorSend( address sender, address recipient, uint256 amount, bytes calldata data, bytes calldata operatorData ) external; /** * @dev Destroys `amount` tokens from `account`, reducing the total supply. * The caller must be an operator of `account`. * * If a send hook is registered for `account`, the corresponding function * will be called with `data` and `operatorData`. See {IERC777Sender}. * * Emits a {Burned} event. * * Requirements * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. * - the caller must be an operator for `account`. */ function operatorBurn( address account, uint256 amount, bytes calldata data, bytes calldata operatorData ) external; event Sent( address indexed operator, address indexed from, address indexed to, uint256 amount, bytes data, bytes operatorData ); event Minted(address indexed operator, address indexed to, uint256 amount, bytes data, bytes operatorData); event Burned(address indexed operator, address indexed from, uint256 amount, bytes data, bytes operatorData); event AuthorizedOperator(address indexed operator, address indexed tokenHolder); event RevokedOperator(address indexed operator, address indexed tokenHolder); } interface IERC777Recipient { /** * @dev Called by an {IERC777} token contract whenever tokens are being * moved or created into a registered account (`to`). The type of operation * is conveyed by `from` being the zero address or not. * * This call occurs _after_ the token contract's state is updated, so * {IERC777-balanceOf}, etc., can be used to query the post-operation state. * * This function may revert to prevent the operation from being executed. */ function tokensReceived( address operator, address from, address to, uint256 amount, bytes calldata userData, bytes calldata operatorData ) external; } interface ILocker { /** * @dev Returns the locked amount of untransferable tokens of a given `wallet` */ function getAndUpdateLockedAmount(address wallet) external returns (uint); /** * @dev Returns the locked amount of untransferable and un-delegatable tokens of a given `wallet`. */ function getAndUpdateForbiddenForDelegationAmount(address wallet) external returns (uint); } interface ISkaleDKG { function openChannel(bytes32 schainId) external; function deleteChannel(bytes32 schainId) external; function isLastDKGSuccesful(bytes32 groupIndex) external view returns (bool); function isChannelOpened(bytes32 schainId) external view returns (bool); } contract Initializable { /** * @dev Indicates that the contract has been initialized. */ bool private initialized; /** * @dev Indicates that the contract is in the process of being initialized. */ bool private initializing; /** * @dev Modifier to use in the initializer function of a contract. */ modifier initializer() { require(initializing || isConstructor() || !initialized, "Contract instance has already been initialized"); bool isTopLevelCall = !initializing; if (isTopLevelCall) { initializing = true; initialized = true; } _; if (isTopLevelCall) { initializing = false; } } /// @dev Returns true if and only if the function is running in the constructor function isConstructor() private view returns (bool) { // extcodesize checks the size of the code stored in an address, and // address returns the current address. Since the code is still not // deployed when running a constructor, any checks on its code size will // yield zero, making it an effective way to detect if a contract is // under construction or not. address self = address(this); uint256 cs; assembly { cs := extcodesize(self) } return cs == 0; } // Reserved storage space to allow for layout changes in the future. uint256[50] private ______gap; } library MathUtils { event UnderflowError( uint a, uint b ); uint constant private _EPS = 1e6; function boundedSub(uint256 a, uint256 b) internal returns (uint256) { if (a >= b) { return a - b; } else { emit UnderflowError(a, b); return 0; } } function boundedSubWithoutEvent(uint256 a, uint256 b) internal pure returns (uint256) { if (a >= b) { return a - b; } else { return 0; } } function muchGreater(uint256 a, uint256 b) internal pure returns (bool) { assert(uint(-1) - _EPS > b); return a > b + _EPS; } function approximatelyEqual(uint256 a, uint256 b) internal pure returns (bool) { if (a > b) { return a - b < _EPS; } else { return b - a < _EPS; } } } library PartialDifferences { using SafeMath for uint; using MathUtils for uint; struct Sequence { // month => diff mapping (uint => uint) addDiff; // month => diff mapping (uint => uint) subtractDiff; // month => value mapping (uint => uint) value; uint firstUnprocessedMonth; uint lastChangedMonth; } struct Value { // month => diff mapping (uint => uint) addDiff; // month => diff mapping (uint => uint) subtractDiff; uint value; uint firstUnprocessedMonth; uint lastChangedMonth; } // functions for sequence function addToSequence(Sequence storage sequence, uint diff, uint month) internal { require(sequence.firstUnprocessedMonth <= month, "Cannot add to the past"); if (sequence.firstUnprocessedMonth == 0) { sequence.firstUnprocessedMonth = month; } sequence.addDiff[month] = sequence.addDiff[month].add(diff); if (sequence.lastChangedMonth != month) { sequence.lastChangedMonth = month; } } function subtractFromSequence(Sequence storage sequence, uint diff, uint month) internal { require(sequence.firstUnprocessedMonth <= month, "Cannot subtract from the past"); if (sequence.firstUnprocessedMonth == 0) { sequence.firstUnprocessedMonth = month; } sequence.subtractDiff[month] = sequence.subtractDiff[month].add(diff); if (sequence.lastChangedMonth != month) { sequence.lastChangedMonth = month; } } function getAndUpdateValueInSequence(Sequence storage sequence, uint month) internal returns (uint) { if (sequence.firstUnprocessedMonth == 0) { return 0; } if (sequence.firstUnprocessedMonth <= month) { for (uint i = sequence.firstUnprocessedMonth; i <= month; ++i) { uint nextValue = sequence.value[i.sub(1)].add(sequence.addDiff[i]).boundedSub(sequence.subtractDiff[i]); if (sequence.value[i] != nextValue) { sequence.value[i] = nextValue; } if (sequence.addDiff[i] > 0) { delete sequence.addDiff[i]; } if (sequence.subtractDiff[i] > 0) { delete sequence.subtractDiff[i]; } } sequence.firstUnprocessedMonth = month.add(1); } return sequence.value[month]; } function reduceSequence( Sequence storage sequence, FractionUtils.Fraction memory reducingCoefficient, uint month) internal { require(month.add(1) >= sequence.firstUnprocessedMonth, "Can't reduce value in the past"); require( reducingCoefficient.numerator <= reducingCoefficient.denominator, "Increasing of values is not implemented"); if (sequence.firstUnprocessedMonth == 0) { return; } uint value = getAndUpdateValueInSequence(sequence, month); if (value.approximatelyEqual(0)) { return; } sequence.value[month] = sequence.value[month] .mul(reducingCoefficient.numerator) .div(reducingCoefficient.denominator); for (uint i = month.add(1); i <= sequence.lastChangedMonth; ++i) { sequence.subtractDiff[i] = sequence.subtractDiff[i] .mul(reducingCoefficient.numerator) .div(reducingCoefficient.denominator); } } // functions for value function addToValue(Value storage sequence, uint diff, uint month) internal { require(sequence.firstUnprocessedMonth <= month, "Cannot add to the past"); if (sequence.firstUnprocessedMonth == 0) { sequence.firstUnprocessedMonth = month; sequence.lastChangedMonth = month; } if (month > sequence.lastChangedMonth) { sequence.lastChangedMonth = month; } if (month >= sequence.firstUnprocessedMonth) { sequence.addDiff[month] = sequence.addDiff[month].add(diff); } else { sequence.value = sequence.value.add(diff); } } function subtractFromValue(Value storage sequence, uint diff, uint month) internal { require(sequence.firstUnprocessedMonth <= month.add(1), "Cannot subtract from the past"); if (sequence.firstUnprocessedMonth == 0) { sequence.firstUnprocessedMonth = month; sequence.lastChangedMonth = month; } if (month > sequence.lastChangedMonth) { sequence.lastChangedMonth = month; } if (month >= sequence.firstUnprocessedMonth) { sequence.subtractDiff[month] = sequence.subtractDiff[month].add(diff); } else { sequence.value = sequence.value.boundedSub(diff); } } function getAndUpdateValue(Value storage sequence, uint month) internal returns (uint) { require( month.add(1) >= sequence.firstUnprocessedMonth, "Cannot calculate value in the past"); if (sequence.firstUnprocessedMonth == 0) { return 0; } if (sequence.firstUnprocessedMonth <= month) { for (uint i = sequence.firstUnprocessedMonth; i <= month; ++i) { uint newValue = sequence.value.add(sequence.addDiff[i]).boundedSub(sequence.subtractDiff[i]); if (sequence.value != newValue) { sequence.value = newValue; } if (sequence.addDiff[i] > 0) { delete sequence.addDiff[i]; } if (sequence.subtractDiff[i] > 0) { delete sequence.subtractDiff[i]; } } sequence.firstUnprocessedMonth = month.add(1); } return sequence.value; } function reduceValue( Value storage sequence, uint amount, uint month) internal returns (FractionUtils.Fraction memory) { require(month.add(1) >= sequence.firstUnprocessedMonth, "Cannot reduce value in the past"); if (sequence.firstUnprocessedMonth == 0) { return FractionUtils.createFraction(0); } uint value = getAndUpdateValue(sequence, month); if (value.approximatelyEqual(0)) { return FractionUtils.createFraction(0); } uint _amount = amount; if (value < amount) { _amount = value; } FractionUtils.Fraction memory reducingCoefficient = FractionUtils.createFraction(value.boundedSub(_amount), value); reduceValueByCoefficient(sequence, reducingCoefficient, month); return reducingCoefficient; } function reduceValueByCoefficient( Value storage sequence, FractionUtils.Fraction memory reducingCoefficient, uint month) internal { reduceValueByCoefficientAndUpdateSumIfNeeded( sequence, sequence, reducingCoefficient, month, false); } function reduceValueByCoefficientAndUpdateSum( Value storage sequence, Value storage sumSequence, FractionUtils.Fraction memory reducingCoefficient, uint month) internal { reduceValueByCoefficientAndUpdateSumIfNeeded( sequence, sumSequence, reducingCoefficient, month, true); } function reduceValueByCoefficientAndUpdateSumIfNeeded( Value storage sequence, Value storage sumSequence, FractionUtils.Fraction memory reducingCoefficient, uint month, bool hasSumSequence) internal { require(month.add(1) >= sequence.firstUnprocessedMonth, "Cannot reduce value in the past"); if (hasSumSequence) { require(month.add(1) >= sumSequence.firstUnprocessedMonth, "Cannot reduce value in the past"); } require( reducingCoefficient.numerator <= reducingCoefficient.denominator, "Increasing of values is not implemented"); if (sequence.firstUnprocessedMonth == 0) { return; } uint value = getAndUpdateValue(sequence, month); if (value.approximatelyEqual(0)) { return; } uint newValue = sequence.value.mul(reducingCoefficient.numerator).div(reducingCoefficient.denominator); if (hasSumSequence) { subtractFromValue(sumSequence, sequence.value.boundedSub(newValue), month); } sequence.value = newValue; for (uint i = month.add(1); i <= sequence.lastChangedMonth; ++i) { uint newDiff = sequence.subtractDiff[i] .mul(reducingCoefficient.numerator) .div(reducingCoefficient.denominator); if (hasSumSequence) { sumSequence.subtractDiff[i] = sumSequence.subtractDiff[i] .boundedSub(sequence.subtractDiff[i].boundedSub(newDiff)); } sequence.subtractDiff[i] = newDiff; } } function clear(Value storage sequence) internal { for (uint i = sequence.firstUnprocessedMonth; i <= sequence.lastChangedMonth; ++i) { if (sequence.addDiff[i] > 0) { delete sequence.addDiff[i]; } if (sequence.subtractDiff[i] > 0) { delete sequence.subtractDiff[i]; } } if (sequence.value > 0) { delete sequence.value; } if (sequence.firstUnprocessedMonth > 0) { delete sequence.firstUnprocessedMonth; } if (sequence.lastChangedMonth > 0) { delete sequence.lastChangedMonth; } } } library Precompiled { function bigModExp(uint base, uint power, uint modulus) internal view returns (uint) { uint[6] memory inputToBigModExp; inputToBigModExp[0] = 32; inputToBigModExp[1] = 32; inputToBigModExp[2] = 32; inputToBigModExp[3] = base; inputToBigModExp[4] = power; inputToBigModExp[5] = modulus; uint[1] memory out; bool success; // solhint-disable-next-line no-inline-assembly assembly { success := staticcall(not(0), 5, inputToBigModExp, mul(6, 0x20), out, 0x20) } require(success, "BigModExp failed"); return out[0]; } function bn256ScalarMul(uint x, uint y, uint k) internal view returns (uint , uint ) { uint[3] memory inputToMul; uint[2] memory output; inputToMul[0] = x; inputToMul[1] = y; inputToMul[2] = k; bool success; // solhint-disable-next-line no-inline-assembly assembly { success := staticcall(not(0), 7, inputToMul, 0x60, output, 0x40) } require(success, "Multiplication failed"); return (output[0], output[1]); } function bn256Pairing( uint x1, uint y1, uint a1, uint b1, uint c1, uint d1, uint x2, uint y2, uint a2, uint b2, uint c2, uint d2) internal view returns (bool) { bool success; uint[12] memory inputToPairing; inputToPairing[0] = x1; inputToPairing[1] = y1; inputToPairing[2] = a1; inputToPairing[3] = b1; inputToPairing[4] = c1; inputToPairing[5] = d1; inputToPairing[6] = x2; inputToPairing[7] = y2; inputToPairing[8] = a2; inputToPairing[9] = b2; inputToPairing[10] = c2; inputToPairing[11] = d2; uint[1] memory out; // solhint-disable-next-line no-inline-assembly assembly { success := staticcall(not(0), 8, inputToPairing, mul(12, 0x20), out, 0x20) } require(success, "Pairing check failed"); return out[0] != 0; } } library SafeCast { /** * @dev Returns the downcasted uint128 from uint256, reverting on * overflow (when the input is greater than largest uint128). * * Counterpart to Solidity's `uint128` operator. * * Requirements: * * - input must fit into 128 bits */ function toUint128(uint256 value) internal pure returns (uint128) { require(value < 2**128, "SafeCast: value doesn\'t fit in 128 bits"); return uint128(value); } /** * @dev Returns the downcasted uint64 from uint256, reverting on * overflow (when the input is greater than largest uint64). * * Counterpart to Solidity's `uint64` operator. * * Requirements: * * - input must fit into 64 bits */ function toUint64(uint256 value) internal pure returns (uint64) { require(value < 2**64, "SafeCast: value doesn\'t fit in 64 bits"); return uint64(value); } /** * @dev Returns the downcasted uint32 from uint256, reverting on * overflow (when the input is greater than largest uint32). * * Counterpart to Solidity's `uint32` operator. * * Requirements: * * - input must fit into 32 bits */ function toUint32(uint256 value) internal pure returns (uint32) { require(value < 2**32, "SafeCast: value doesn\'t fit in 32 bits"); return uint32(value); } /** * @dev Returns the downcasted uint16 from uint256, reverting on * overflow (when the input is greater than largest uint16). * * Counterpart to Solidity's `uint16` operator. * * Requirements: * * - input must fit into 16 bits */ function toUint16(uint256 value) internal pure returns (uint16) { require(value < 2**16, "SafeCast: value doesn\'t fit in 16 bits"); return uint16(value); } /** * @dev Returns the downcasted uint8 from uint256, reverting on * overflow (when the input is greater than largest uint8). * * Counterpart to Solidity's `uint8` operator. * * Requirements: * * - input must fit into 8 bits. */ function toUint8(uint256 value) internal pure returns (uint8) { require(value < 2**8, "SafeCast: value doesn\'t fit in 8 bits"); return uint8(value); } /** * @dev Converts a signed int256 into an unsigned uint256. * * Requirements: * * - input must be greater than or equal to 0. */ function toUint256(int256 value) internal pure returns (uint256) { require(value >= 0, "SafeCast: value must be positive"); return uint256(value); } /** * @dev Converts an unsigned uint256 into a signed int256. * * Requirements: * * - input must be less than or equal to maxInt256. */ function toInt256(uint256 value) internal pure returns (int256) { require(value < 2**255, "SafeCast: value doesn't fit in an int256"); return int256(value); } } library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { // Solidity only automatically asserts when dividing by 0 require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } library StringUtils { using SafeMath for uint; function strConcat(string memory a, string memory b) internal pure returns (string memory) { bytes memory _ba = bytes(a); bytes memory _bb = bytes(b); string memory ab = new string(_ba.length.add(_bb.length)); bytes memory strBytes = bytes(ab); uint k = 0; uint i = 0; for (i = 0; i < _ba.length; i++) { strBytes[k++] = _ba[i]; } for (i = 0; i < _bb.length; i++) { strBytes[k++] = _bb[i]; } return string(strBytes); } function uint2str(uint i) internal pure returns (string memory) { if (i == 0) { return "0"; } uint j = i; uint _i = i; uint len; while (j != 0) { len++; j /= 10; } bytes memory bstr = new bytes(len); uint k = len.sub(1); while (_i != 0) { bstr[k--] = byte(uint8(48 + _i % 10)); _i /= 10; } return string(bstr); } } contract TimeHelpers { using SafeMath for uint; uint constant private _ZERO_YEAR = 2020; uint constant private _FICTIOUS_MONTH_START = 1599523200; uint constant private _FICTIOUS_MONTH_NUMBER = 9; function calculateProofOfUseLockEndTime(uint month, uint lockUpPeriodDays) external view returns (uint timestamp) { timestamp = BokkyPooBahsDateTimeLibrary.addDays(monthToTimestamp(month), lockUpPeriodDays); } function addDays(uint fromTimestamp, uint n) external pure returns (uint) { return BokkyPooBahsDateTimeLibrary.addDays(fromTimestamp, n); } function addMonths(uint fromTimestamp, uint n) external pure returns (uint) { return BokkyPooBahsDateTimeLibrary.addMonths(fromTimestamp, n); } function addYears(uint fromTimestamp, uint n) external pure returns (uint) { return BokkyPooBahsDateTimeLibrary.addYears(fromTimestamp, n); } function getCurrentMonth() external view virtual returns (uint) { return timestampToMonth(now); } function timestampToDay(uint timestamp) external view returns (uint) { uint wholeDays = timestamp / BokkyPooBahsDateTimeLibrary.SECONDS_PER_DAY; uint zeroDay = BokkyPooBahsDateTimeLibrary.timestampFromDate(_ZERO_YEAR, 1, 1) / BokkyPooBahsDateTimeLibrary.SECONDS_PER_DAY; require(wholeDays >= zeroDay, "Timestamp is too far in the past"); return wholeDays - zeroDay; } function timestampToYear(uint timestamp) external view virtual returns (uint) { uint year; (year, , ) = BokkyPooBahsDateTimeLibrary.timestampToDate(timestamp); require(year >= _ZERO_YEAR, "Timestamp is too far in the past"); return year - _ZERO_YEAR; } function timestampToMonth(uint timestamp) public view virtual returns (uint) { uint year; uint month; (year, month, ) = BokkyPooBahsDateTimeLibrary.timestampToDate(timestamp); require(year >= _ZERO_YEAR, "Timestamp is too far in the past"); month = month.sub(1).add(year.sub(_ZERO_YEAR).mul(12)); require(month > 0, "Timestamp is too far in the past"); if (timestamp >= _FICTIOUS_MONTH_START) { month = month.add(1); } return month; } function monthToTimestamp(uint month) public view virtual returns (uint timestamp) { uint year = _ZERO_YEAR; uint _month = month; if (_month > _FICTIOUS_MONTH_NUMBER) { _month = _month.sub(1); } else if (_month == _FICTIOUS_MONTH_NUMBER) { return _FICTIOUS_MONTH_START; } year = year.add(_month.div(12)); _month = _month.mod(12); _month = _month.add(1); return BokkyPooBahsDateTimeLibrary.timestampFromDate(year, _month, 1); } } contract ContextUpgradeSafe is Initializable { // Empty internal constructor, to prevent people from mistakenly deploying // an instance of this contract, which should be used via inheritance. function __Context_init() internal initializer { __Context_init_unchained(); } function __Context_init_unchained() internal initializer { } function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } uint256[50] private __gap; } contract OwnableUpgradeSafe is Initializable, ContextUpgradeSafe { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ function __Ownable_init() internal initializer { __Context_init_unchained(); __Ownable_init_unchained(); } function __Ownable_init_unchained() internal initializer { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), msgSender); } /** * @dev Returns the address of the current owner. */ function owner() public view returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(_owner == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { emit OwnershipTransferred(_owner, address(0)); _owner = address(0); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } uint256[49] private __gap; } abstract contract AccessControlUpgradeSafe is Initializable, ContextUpgradeSafe { function __AccessControl_init() internal initializer { __Context_init_unchained(); __AccessControl_init_unchained(); } function __AccessControl_init_unchained() internal initializer { } using EnumerableSet for EnumerableSet.AddressSet; using Address for address; struct RoleData { EnumerableSet.AddressSet members; bytes32 adminRole; } mapping (bytes32 => RoleData) private _roles; bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00; /** * @dev Emitted when `account` is granted `role`. * * `sender` is the account that originated the contract call, an admin role * bearer except when using {_setupRole}. */ event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender); /** * @dev Emitted when `account` is revoked `role`. * * `sender` is the account that originated the contract call: * - if using `revokeRole`, it is the admin role bearer * - if using `renounceRole`, it is the role bearer (i.e. `account`) */ event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender); /** * @dev Returns `true` if `account` has been granted `role`. */ function hasRole(bytes32 role, address account) public view returns (bool) { return _roles[role].members.contains(account); } /** * @dev Returns the number of accounts that have `role`. Can be used * together with {getRoleMember} to enumerate all bearers of a role. */ function getRoleMemberCount(bytes32 role) public view returns (uint256) { return _roles[role].members.length(); } /** * @dev Returns one of the accounts that have `role`. `index` must be a * value between 0 and {getRoleMemberCount}, non-inclusive. * * Role bearers are not sorted in any particular way, and their ordering may * change at any point. * * WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure * you perform all queries on the same block. See the following * https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post] * for more information. */ function getRoleMember(bytes32 role, uint256 index) public view returns (address) { return _roles[role].members.at(index); } /** * @dev Returns the admin role that controls `role`. See {grantRole} and * {revokeRole}. * * To change a role's admin, use {_setRoleAdmin}. */ function getRoleAdmin(bytes32 role) public view returns (bytes32) { return _roles[role].adminRole; } /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function grantRole(bytes32 role, address account) public virtual { require(hasRole(_roles[role].adminRole, _msgSender()), "AccessControl: sender must be an admin to grant"); _grantRole(role, account); } /** * @dev Revokes `role` from `account`. * * If `account` had been granted `role`, emits a {RoleRevoked} event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function revokeRole(bytes32 role, address account) public virtual { require(hasRole(_roles[role].adminRole, _msgSender()), "AccessControl: sender must be an admin to revoke"); _revokeRole(role, account); } /** * @dev Revokes `role` from the calling account. * * Roles are often managed via {grantRole} and {revokeRole}: this function's * purpose is to provide a mechanism for accounts to lose their privileges * if they are compromised (such as when a trusted device is misplaced). * * If the calling account had been granted `role`, emits a {RoleRevoked} * event. * * Requirements: * * - the caller must be `account`. */ function renounceRole(bytes32 role, address account) public virtual { require(account == _msgSender(), "AccessControl: can only renounce roles for self"); _revokeRole(role, account); } /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. Note that unlike {grantRole}, this function doesn't perform any * checks on the calling account. * * [WARNING] * ==== * This function should only be called from the constructor when setting * up the initial roles for the system. * * Using this function in any other way is effectively circumventing the admin * system imposed by {AccessControl}. * ==== */ function _setupRole(bytes32 role, address account) internal virtual { _grantRole(role, account); } /** * @dev Sets `adminRole` as ``role``'s admin role. */ function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual { _roles[role].adminRole = adminRole; } function _grantRole(bytes32 role, address account) private { if (_roles[role].members.add(account)) { emit RoleGranted(role, account, _msgSender()); } } function _revokeRole(bytes32 role, address account) private { if (_roles[role].members.remove(account)) { emit RoleRevoked(role, account, _msgSender()); } } uint256[49] private __gap; } contract ContractManager is OwnableUpgradeSafe { using StringUtils for string; using Address for address; // mapping of actual smart contracts addresses mapping (bytes32 => address) public contracts; event ContractUpgraded(string contractsName, address contractsAddress); function initialize() external initializer { OwnableUpgradeSafe.__Ownable_init(); } /** * Adds actual contract to mapping of actual contract addresses * @param contractsName - contracts name in skale manager system * @param newContractsAddress - contracts address in skale manager system */ function setContractsAddress(string calldata contractsName, address newContractsAddress) external onlyOwner { // check newContractsAddress is not equal to zero require(newContractsAddress != address(0), "New address is equal zero"); // create hash of contractsName bytes32 contractId = keccak256(abi.encodePacked(contractsName)); // check newContractsAddress is not equal the previous contract's address require(contracts[contractId] != newContractsAddress, "Contract is already added"); require(newContractsAddress.isContract(), "Given contracts address does not contain code"); // add newContractsAddress to mapping of actual contract addresses contracts[contractId] = newContractsAddress; emit ContractUpgraded(contractsName, newContractsAddress); } function getContract(string calldata name) external view returns (address contractAddress) { contractAddress = contracts[keccak256(abi.encodePacked(name))]; require(contractAddress != address(0), name.strConcat(" contract has not been found")); } } contract Permissions is AccessControlUpgradeSafe { using SafeMath for uint; using Address for address; ContractManager public contractManager; /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(_isOwner(), "Caller is not the owner"); _; } modifier onlyAdmin() { require(_isAdmin(msg.sender), "Caller is not an admin"); _; } /** * @dev allow - throws if called by any account and contract other than the owner * or `contractName` contract * @param contractName - human readable name of contract */ modifier allow(string memory contractName) { require( contractManager.contracts(keccak256(abi.encodePacked(contractName))) == msg.sender || _isOwner(), "Message sender is invalid"); _; } modifier allowTwo(string memory contractName1, string memory contractName2) { require( contractManager.contracts(keccak256(abi.encodePacked(contractName1))) == msg.sender || contractManager.contracts(keccak256(abi.encodePacked(contractName2))) == msg.sender || _isOwner(), "Message sender is invalid"); _; } modifier allowThree(string memory contractName1, string memory contractName2, string memory contractName3) { require( contractManager.contracts(keccak256(abi.encodePacked(contractName1))) == msg.sender || contractManager.contracts(keccak256(abi.encodePacked(contractName2))) == msg.sender || contractManager.contracts(keccak256(abi.encodePacked(contractName3))) == msg.sender || _isOwner(), "Message sender is invalid"); _; } function initialize(address contractManagerAddress) public virtual initializer { AccessControlUpgradeSafe.__AccessControl_init(); _setupRole(DEFAULT_ADMIN_ROLE, msg.sender); _setContractManager(contractManagerAddress); } function _isOwner() internal view returns (bool) { return hasRole(DEFAULT_ADMIN_ROLE, msg.sender); } function _isAdmin(address account) internal view returns (bool) { address skaleManagerAddress = contractManager.contracts(keccak256(abi.encodePacked("SkaleManager"))); if (skaleManagerAddress != address(0)) { AccessControlUpgradeSafe skaleManager = AccessControlUpgradeSafe(skaleManagerAddress); return skaleManager.hasRole(keccak256("ADMIN_ROLE"), account) || _isOwner(); } else { return _isOwner(); } } function _setContractManager(address contractManagerAddress) private { require(contractManagerAddress != address(0), "ContractManager address is not set"); require(contractManagerAddress.isContract(), "Address is not contract"); contractManager = ContractManager(contractManagerAddress); } } contract Pricing is Permissions { uint public constant INITIAL_PRICE = 5 * 10**6; uint public price; uint public totalNodes; uint public lastUpdated; function initNodes() external { Nodes nodes = Nodes(contractManager.getContract("Nodes")); totalNodes = nodes.getNumberOnlineNodes(); } function adjustPrice() external { ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); require(now > lastUpdated.add(constantsHolder.COOLDOWN_TIME()), "It's not a time to update a price"); checkAllNodes(); uint load = _getTotalLoad(); uint capacity = _getTotalCapacity(); bool networkIsOverloaded = load.mul(100) > constantsHolder.OPTIMAL_LOAD_PERCENTAGE().mul(capacity); uint loadDiff; if (networkIsOverloaded) { loadDiff = load.mul(100).sub(constantsHolder.OPTIMAL_LOAD_PERCENTAGE().mul(capacity)); } else { loadDiff = constantsHolder.OPTIMAL_LOAD_PERCENTAGE().mul(capacity).sub(load.mul(100)); } uint priceChangeSpeedMultipliedByCapacityAndMinPrice = constantsHolder.ADJUSTMENT_SPEED().mul(loadDiff).mul(price); uint timeSkipped = now.sub(lastUpdated); uint priceChange = priceChangeSpeedMultipliedByCapacityAndMinPrice .mul(timeSkipped) .div(constantsHolder.COOLDOWN_TIME()) .div(capacity) .div(constantsHolder.MIN_PRICE()); if (networkIsOverloaded) { assert(priceChange > 0); price = price.add(priceChange); } else { if (priceChange > price) { price = constantsHolder.MIN_PRICE(); } else { price = price.sub(priceChange); if (price < constantsHolder.MIN_PRICE()) { price = constantsHolder.MIN_PRICE(); } } } lastUpdated = now; } function getTotalLoadPercentage() external view returns (uint) { return _getTotalLoad().mul(100).div(_getTotalCapacity()); } function initialize(address newContractsAddress) public override initializer { Permissions.initialize(newContractsAddress); lastUpdated = now; price = INITIAL_PRICE; } function checkAllNodes() public { Nodes nodes = Nodes(contractManager.getContract("Nodes")); uint numberOfActiveNodes = nodes.getNumberOnlineNodes(); require(totalNodes != numberOfActiveNodes, "No any changes on nodes"); totalNodes = numberOfActiveNodes; } function _getTotalLoad() private view returns (uint) { SchainsInternal schainsInternal = SchainsInternal(contractManager.getContract("SchainsInternal")); uint load = 0; uint numberOfSchains = schainsInternal.numberOfSchains(); for (uint i = 0; i < numberOfSchains; i++) { bytes32 schain = schainsInternal.schainsAtSystem(i); uint numberOfNodesInSchain = schainsInternal.getNumberOfNodesInGroup(schain); uint part = schainsInternal.getSchainsPartOfNode(schain); load = load.add( numberOfNodesInSchain.mul(part) ); } return load; } function _getTotalCapacity() private view returns (uint) { Nodes nodes = Nodes(contractManager.getContract("Nodes")); ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); return nodes.getNumberOnlineNodes().mul(constantsHolder.TOTAL_SPACE_ON_NODE()); } } contract Punisher is Permissions, ILocker { /** * @dev Emitted when a slashing condition occurs. */ event Slash( uint validatorId, uint amount ); /** * @dev Emitted when a forgive condition occurs. */ event Forgive( address wallet, uint amount ); // holder => tokens mapping (address => uint) private _locked; /** * @dev Executes slashing on a validator and its delegations by an `amount` * of tokens. Currently, SkaleDKG is the only service allowed to execute * slashing. * * Emits a Slash event. * * @param validatorId uint validator to be slashed * @param amount uint slashed amount */ function slash(uint validatorId, uint amount) external allow("SkaleDKG") { ValidatorService validatorService = ValidatorService(contractManager.getContract("ValidatorService")); DelegationController delegationController = DelegationController( contractManager.getContract("DelegationController")); require(validatorService.validatorExists(validatorId), "Validator does not exist"); delegationController.confiscate(validatorId, amount); emit Slash(validatorId, amount); } /** * @dev Allows the Owner to forgive a slashing condition. * * Emits a Forgive event. * * @param holder address of the slashed * @param amount uint amount to be forgiven */ function forgive(address holder, uint amount) external onlyAdmin { DelegationController delegationController = DelegationController( contractManager.getContract("DelegationController")); require(!delegationController.hasUnprocessedSlashes(holder), "Not all slashes were calculated"); if (amount > _locked[holder]) { delete _locked[holder]; } else { _locked[holder] = _locked[holder].sub(amount); } emit Forgive(holder, amount); } /** * @dev See ILocker-getAndUpdateLockedAmount */ function getAndUpdateLockedAmount(address wallet) external override returns (uint) { return _getAndUpdateLockedAmount(wallet); } /** * @dev See ILocker-getAndUpdateForbiddenForDelegationAmount */ function getAndUpdateForbiddenForDelegationAmount(address wallet) external override returns (uint) { return _getAndUpdateLockedAmount(wallet); } function handleSlash(address holder, uint amount) external allow("DelegationController") { _locked[holder] = _locked[holder].add(amount); } function initialize(address contractManagerAddress) public override initializer { Permissions.initialize(contractManagerAddress); } // private function _getAndUpdateLockedAmount(address wallet) private returns (uint) { DelegationController delegationController = DelegationController( contractManager.getContract("DelegationController")); delegationController.processAllSlashes(wallet); return _locked[wallet]; } } contract Schains is Permissions { using StringUtils for string; using StringUtils for uint; struct SchainParameters { uint lifetime; uint8 typeOfSchain; uint16 nonce; string name; } // informs that Schain is created event SchainCreated( string name, address owner, uint partOfNode, uint lifetime, uint numberOfNodes, uint deposit, uint16 nonce, bytes32 schainId, uint time, uint gasSpend ); event SchainDeleted( address owner, string name, bytes32 indexed schainId ); event NodeRotated( bytes32 schainId, uint oldNode, uint newNode ); event NodeAdded( bytes32 schainId, uint newNode ); // informs that Schain based on some Nodes event SchainNodes( string name, bytes32 schainId, uint[] nodesInGroup, uint time, uint gasSpend ); bytes32 public constant SCHAIN_CREATOR_ROLE = keccak256("SCHAIN_CREATOR_ROLE"); /** * @dev addSchain - create Schain in the system * function could be run only by executor * @param from - owner of Schain * @param deposit - received amoung of SKL * @param data - Schain's data */ function addSchain(address from, uint deposit, bytes calldata data) external allow("SkaleManager") { SchainParameters memory schainParameters = _fallbackSchainParametersDataConverter(data); require( getSchainPrice(schainParameters.typeOfSchain, schainParameters.lifetime) <= deposit, "Not enough money to create Schain"); _addSchain(from, deposit, schainParameters); } function addSchainByFoundation( uint lifetime, uint8 typeOfSchain, uint16 nonce, string calldata name ) external { require(hasRole(SCHAIN_CREATOR_ROLE, msg.sender), "Sender is not authorized to create schian"); SchainParameters memory schainParameters = SchainParameters({ lifetime: lifetime, typeOfSchain: typeOfSchain, nonce: nonce, name: name }); _addSchain(msg.sender, 0, schainParameters); } /** * @dev deleteSchain - removes Schain from the system * function could be run only by executor * @param from - owner of Schain * @param name - Schain name */ function deleteSchain(address from, string calldata name) external allow("SkaleManager") { NodeRotation nodeRotation = NodeRotation(contractManager.getContract("NodeRotation")); SchainsInternal schainsInternal = SchainsInternal(contractManager.getContract("SchainsInternal")); bytes32 schainId = keccak256(abi.encodePacked(name)); require( schainsInternal.isOwnerAddress(from, schainId), "Message sender is not an owner of Schain" ); address nodesAddress = contractManager.getContract("Nodes"); // removes Schain from Nodes uint[] memory nodesInGroup = schainsInternal.getNodesInGroup(schainId); uint8 partOfNode = schainsInternal.getSchainsPartOfNode(schainId); for (uint i = 0; i < nodesInGroup.length; i++) { uint schainIndex = schainsInternal.findSchainAtSchainsForNode( nodesInGroup[i], schainId ); if (schainsInternal.checkHoleForSchain(schainId, nodesInGroup[i])) { schainsInternal.removeNodeFromExceptions(schainId, nodesInGroup[i]); _addSpace(nodesInGroup[i], partOfNode); continue; } require( schainIndex < schainsInternal.getLengthOfSchainsForNode(nodesInGroup[i]), "Some Node does not contain given Schain"); schainsInternal.removeNodeFromSchain(nodesInGroup[i], schainId); schainsInternal.removeNodeFromExceptions(schainId, nodesInGroup[i]); if (!Nodes(nodesAddress).isNodeLeft(nodesInGroup[i])) { _addSpace(nodesInGroup[i], partOfNode); } } schainsInternal.deleteGroup(schainId); schainsInternal.removeSchain(schainId, from); schainsInternal.removeHolesForSchain(schainId); nodeRotation.removeRotation(schainId); emit SchainDeleted(from, name, schainId); } function deleteSchainByRoot(string calldata name) external allow("SkaleManager") { NodeRotation nodeRotation = NodeRotation(contractManager.getContract("NodeRotation")); bytes32 schainId = keccak256(abi.encodePacked(name)); SchainsInternal schainsInternal = SchainsInternal( contractManager.getContract("SchainsInternal")); require(schainsInternal.isSchainExist(schainId), "Schain does not exist"); // removes Schain from Nodes uint[] memory nodesInGroup = schainsInternal.getNodesInGroup(schainId); uint8 partOfNode = schainsInternal.getSchainsPartOfNode(schainId); for (uint i = 0; i < nodesInGroup.length; i++) { uint schainIndex = schainsInternal.findSchainAtSchainsForNode( nodesInGroup[i], schainId ); if (schainsInternal.checkHoleForSchain(schainId, nodesInGroup[i])) { schainsInternal.removeNodeFromExceptions(schainId, nodesInGroup[i]); _addSpace(nodesInGroup[i], partOfNode); continue; } require( schainIndex < schainsInternal.getLengthOfSchainsForNode(nodesInGroup[i]), "Some Node does not contain given Schain"); schainsInternal.removeNodeFromSchain(nodesInGroup[i], schainId); schainsInternal.removeNodeFromExceptions(schainId, nodesInGroup[i]); _addSpace(nodesInGroup[i], partOfNode); } schainsInternal.deleteGroup(schainId); address from = schainsInternal.getSchainOwner(schainId); schainsInternal.removeSchain(schainId, from); schainsInternal.removeHolesForSchain(schainId); nodeRotation.removeRotation(schainId); emit SchainDeleted(from, name, schainId); } function restartSchainCreation(string calldata name) external allow("SkaleManager") { NodeRotation nodeRotation = NodeRotation(contractManager.getContract("NodeRotation")); bytes32 schainId = keccak256(abi.encodePacked(name)); ISkaleDKG skaleDKG = ISkaleDKG(contractManager.getContract("SkaleDKG")); require(!skaleDKG.isLastDKGSuccesful(schainId), "DKG success"); SchainsInternal schainsInternal = SchainsInternal( contractManager.getContract("SchainsInternal")); require(schainsInternal.isAnyFreeNode(schainId), "No any free Nodes for rotation"); uint newNodeIndex = nodeRotation.selectNodeToGroup(schainId); skaleDKG.openChannel(schainId); emit NodeAdded(schainId, newNodeIndex); } /** * @dev verifySignature - verify signature which create Group by Groups BLS master public key * @param signatureA - first part of BLS signature * @param signatureB - second part of BLS signature * @param hash - hashed message * @param counter - smallest sub from square * @param hashA - first part of hashed message * @param hashB - second part of hashed message * @param schainName - name of the Schain * @return true - if correct, false - if not */ function verifySchainSignature( uint signatureA, uint signatureB, bytes32 hash, uint counter, uint hashA, uint hashB, string calldata schainName ) external view returns (bool) { SkaleVerifier skaleVerifier = SkaleVerifier(contractManager.getContract("SkaleVerifier")); G2Operations.G2Point memory publicKey = KeyStorage( contractManager.getContract("KeyStorage") ).getCommonPublicKey( keccak256(abi.encodePacked(schainName)) ); return skaleVerifier.verify( Fp2Operations.Fp2Point({ a: signatureA, b: signatureB }), hash, counter, hashA, hashB, publicKey ); } function initialize(address newContractsAddress) public override initializer { Permissions.initialize(newContractsAddress); } /** * @dev getSchainPrice - returns current price for given Schain * @param typeOfSchain - type of Schain * @param lifetime - lifetime of Schain * @return current price for given Schain */ function getSchainPrice(uint typeOfSchain, uint lifetime) public view returns (uint) { ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); uint nodeDeposit = constantsHolder.NODE_DEPOSIT(); uint numberOfNodes; uint8 divisor; (numberOfNodes, divisor) = getNodesDataFromTypeOfSchain(typeOfSchain); if (divisor == 0) { return 1e18; } else { uint up = nodeDeposit.mul(numberOfNodes.mul(lifetime.mul(2))); uint down = uint( uint(constantsHolder.SMALL_DIVISOR()) .mul(uint(constantsHolder.SECONDS_TO_YEAR())) .div(divisor) ); return up.div(down); } } /** * @dev getNodesDataFromTypeOfSchain - returns number if Nodes * and part of Node which needed to this Schain * @param typeOfSchain - type of Schain * @return numberOfNodes - number of Nodes needed to this Schain * @return partOfNode - divisor of given type of Schain */ function getNodesDataFromTypeOfSchain(uint typeOfSchain) public view returns (uint numberOfNodes, uint8 partOfNode) { ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); numberOfNodes = constantsHolder.NUMBER_OF_NODES_FOR_SCHAIN(); if (typeOfSchain == 1) { partOfNode = constantsHolder.SMALL_DIVISOR() / constantsHolder.SMALL_DIVISOR(); } else if (typeOfSchain == 2) { partOfNode = constantsHolder.SMALL_DIVISOR() / constantsHolder.MEDIUM_DIVISOR(); } else if (typeOfSchain == 3) { partOfNode = constantsHolder.SMALL_DIVISOR() / constantsHolder.LARGE_DIVISOR(); } else if (typeOfSchain == 4) { partOfNode = 0; numberOfNodes = constantsHolder.NUMBER_OF_NODES_FOR_TEST_SCHAIN(); } else if (typeOfSchain == 5) { partOfNode = constantsHolder.SMALL_DIVISOR() / constantsHolder.MEDIUM_TEST_DIVISOR(); numberOfNodes = constantsHolder.NUMBER_OF_NODES_FOR_MEDIUM_TEST_SCHAIN(); } else { revert("Bad schain type"); } } function _initializeSchainInSchainsInternal( string memory name, address from, uint deposit, uint lifetime) private { address dataAddress = contractManager.getContract("SchainsInternal"); require(SchainsInternal(dataAddress).isSchainNameAvailable(name), "Schain name is not available"); // initialize Schain SchainsInternal(dataAddress).initializeSchain( name, from, lifetime, deposit); SchainsInternal(dataAddress).setSchainIndex(keccak256(abi.encodePacked(name)), from); } /** * @dev fallbackSchainParameterDataConverter - converts data from bytes to normal parameters * @param data - concatenated parameters * @return schainParameters Parsed lifetime, typeOfSchain, nonce and name */ function _fallbackSchainParametersDataConverter(bytes memory data) private pure returns (SchainParameters memory schainParameters) { (schainParameters.lifetime, schainParameters.typeOfSchain, schainParameters.nonce, schainParameters.name) = abi.decode(data, (uint, uint8, uint16, string)); } /** * @dev _addSpace - return occupied space to Node * @param nodeIndex - index of Node at common array of Nodes * @param partOfNode - divisor of given type of Schain */ function _addSpace(uint nodeIndex, uint8 partOfNode) private { Nodes nodes = Nodes(contractManager.getContract("Nodes")); nodes.addSpaceToNode(nodeIndex, partOfNode); } /** * @dev _createGroupForSchain - creates Group for Schain * @param schainName - name of Schain * @param schainId - hash by name of Schain * @param numberOfNodes - number of Nodes needed for this Schain * @param partOfNode - divisor of given type of Schain */ function _createGroupForSchain( string memory schainName, bytes32 schainId, uint numberOfNodes, uint8 partOfNode ) private { SchainsInternal schainsInternal = SchainsInternal(contractManager.getContract("SchainsInternal")); uint[] memory nodesInGroup = schainsInternal.createGroupForSchain(schainId, numberOfNodes, partOfNode); ISkaleDKG(contractManager.getContract("SkaleDKG")).openChannel(schainId); emit SchainNodes( schainName, schainId, nodesInGroup, block.timestamp, gasleft()); } /** * @dev _addSchain - create Schain in the system * function could be run only by executor * @param from - owner of Schain * @param deposit - received amoung of SKL * @param schainParameters - Schain's data */ function _addSchain(address from, uint deposit, SchainParameters memory schainParameters) private { uint numberOfNodes; uint8 partOfNode; require(schainParameters.typeOfSchain <= 5, "Invalid type of Schain"); //initialize Schain _initializeSchainInSchainsInternal( schainParameters.name, from, deposit, schainParameters.lifetime); // create a group for Schain (numberOfNodes, partOfNode) = getNodesDataFromTypeOfSchain(schainParameters.typeOfSchain); _createGroupForSchain( schainParameters.name, keccak256(abi.encodePacked(schainParameters.name)), numberOfNodes, partOfNode ); emit SchainCreated( schainParameters.name, from, partOfNode, schainParameters.lifetime, numberOfNodes, deposit, schainParameters.nonce, keccak256(abi.encodePacked(schainParameters.name)), block.timestamp, gasleft()); } } contract SchainsInternal is Permissions { struct Schain { string name; address owner; uint indexInOwnerList; uint8 partOfNode; uint lifetime; uint startDate; uint startBlock; uint deposit; uint64 index; } // mapping which contain all schains mapping (bytes32 => Schain) public schains; mapping (bytes32 => bool) public isSchainActive; mapping (bytes32 => uint[]) public schainsGroups; mapping (bytes32 => mapping (uint => bool)) private _exceptionsForGroups; // mapping shows schains by owner's address mapping (address => bytes32[]) public schainIndexes; // mapping shows schains which Node composed in mapping (uint => bytes32[]) public schainsForNodes; mapping (uint => uint[]) public holesForNodes; mapping (bytes32 => uint[]) public holesForSchains; // array which contain all schains bytes32[] public schainsAtSystem; uint64 public numberOfSchains; // total resources that schains occupied uint public sumOfSchainsResources; /** * @dev initializeSchain - initializes Schain * function could be run only by executor * @param name - SChain name * @param from - Schain owner * @param lifetime - initial lifetime of Schain * @param deposit - given amount of SKL */ function initializeSchain( string calldata name, address from, uint lifetime, uint deposit) external allow("Schains") { bytes32 schainId = keccak256(abi.encodePacked(name)); schains[schainId].name = name; schains[schainId].owner = from; schains[schainId].startDate = block.timestamp; schains[schainId].startBlock = block.number; schains[schainId].lifetime = lifetime; schains[schainId].deposit = deposit; schains[schainId].index = numberOfSchains; isSchainActive[schainId] = true; numberOfSchains++; schainsAtSystem.push(schainId); } function createGroupForSchain( bytes32 schainId, uint numberOfNodes, uint8 partOfNode ) external allow("Schains") returns (uint[] memory) { ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); schains[schainId].partOfNode = partOfNode; if (partOfNode > 0) { sumOfSchainsResources = sumOfSchainsResources.add( numberOfNodes.mul(constantsHolder.TOTAL_SPACE_ON_NODE()).div(partOfNode) ); } return _generateGroup(schainId, numberOfNodes); } /** * @dev setSchainIndex - adds Schain's hash to owner * function could be run only by executor * @param schainId - hash by Schain name * @param from - Schain owner */ function setSchainIndex(bytes32 schainId, address from) external allow("Schains") { schains[schainId].indexInOwnerList = schainIndexes[from].length; schainIndexes[from].push(schainId); } /** * @dev changeLifetime - changes Lifetime for Schain * function could be run only by executor * @param schainId - hash by Schain name * @param lifetime - time which would be added to lifetime of Schain * @param deposit - amount of SKL which payed for this time */ function changeLifetime(bytes32 schainId, uint lifetime, uint deposit) external allow("Schains") { schains[schainId].deposit = schains[schainId].deposit.add(deposit); schains[schainId].lifetime = schains[schainId].lifetime.add(lifetime); } /** * @dev removeSchain - removes Schain from the system * function could be run only by executor * @param schainId - hash by Schain name * @param from - owner of Schain */ function removeSchain(bytes32 schainId, address from) external allow("Schains") { isSchainActive[schainId] = false; uint length = schainIndexes[from].length; uint index = schains[schainId].indexInOwnerList; if (index != length.sub(1)) { bytes32 lastSchainId = schainIndexes[from][length.sub(1)]; schains[lastSchainId].indexInOwnerList = index; schainIndexes[from][index] = lastSchainId; } schainIndexes[from].pop(); // TODO: // optimize for (uint i = 0; i + 1 < schainsAtSystem.length; i++) { if (schainsAtSystem[i] == schainId) { schainsAtSystem[i] = schainsAtSystem[schainsAtSystem.length.sub(1)]; break; } } schainsAtSystem.pop(); delete schains[schainId]; numberOfSchains--; } function removeNodeFromSchain( uint nodeIndex, bytes32 schainHash ) external allowThree("NodeRotation", "SkaleDKG", "Schains") { uint indexOfNode = _findNode(schainHash, nodeIndex); uint indexOfLastNode = schainsGroups[schainHash].length.sub(1); if (indexOfNode == indexOfLastNode) { schainsGroups[schainHash].pop(); } else { delete schainsGroups[schainHash][indexOfNode]; if (holesForSchains[schainHash].length > 0 && holesForSchains[schainHash][0] > indexOfNode) { uint hole = holesForSchains[schainHash][0]; holesForSchains[schainHash][0] = indexOfNode; holesForSchains[schainHash].push(hole); } else { holesForSchains[schainHash].push(indexOfNode); } } uint schainId = findSchainAtSchainsForNode(nodeIndex, schainHash); removeSchainForNode(nodeIndex, schainId); } function removeNodeFromExceptions(bytes32 schainHash, uint nodeIndex) external allow("Schains") { _exceptionsForGroups[schainHash][nodeIndex] = false; } /** * @dev deleteGroup - delete Group from Data contract * function could be run only by executor * @param schainId - Groups identifier */ function deleteGroup(bytes32 schainId) external allow("Schains") { // delete channel ISkaleDKG skaleDKG = ISkaleDKG(contractManager.getContract("SkaleDKG")); delete schainsGroups[schainId]; if (skaleDKG.isChannelOpened(schainId)) { skaleDKG.deleteChannel(schainId); } } /** * @dev setException - sets a Node like exception * function could be run only by executor * @param schainId - Groups identifier * @param nodeIndex - index of Node which would be notes like exception */ function setException(bytes32 schainId, uint nodeIndex) external allowTwo("Schains", "NodeRotation") { _exceptionsForGroups[schainId][nodeIndex] = true; } /** * @dev setNodeInGroup - adds Node to Group * function could be run only by executor * @param schainId - Groups * @param nodeIndex - index of Node which would be added to the Group */ function setNodeInGroup(bytes32 schainId, uint nodeIndex) external allowTwo("Schains", "NodeRotation") { if (holesForSchains[schainId].length == 0) { schainsGroups[schainId].push(nodeIndex); } else { schainsGroups[schainId][holesForSchains[schainId][0]] = nodeIndex; uint min = uint(-1); uint index = 0; for (uint i = 1; i < holesForSchains[schainId].length; i++) { if (min > holesForSchains[schainId][i]) { min = holesForSchains[schainId][i]; index = i; } } if (min == uint(-1)) { delete holesForSchains[schainId]; } else { holesForSchains[schainId][0] = min; holesForSchains[schainId][index] = holesForSchains[schainId][holesForSchains[schainId].length - 1]; holesForSchains[schainId].pop(); } } } function removeHolesForSchain(bytes32 schainHash) external allow("Schains") { delete holesForSchains[schainHash]; } /** * @dev getSchains - gets all Schains at the system * @return array of hashes by Schain names */ function getSchains() external view returns (bytes32[] memory) { return schainsAtSystem; } /** * @dev getSchainsPartOfNode - gets occupied space for given Schain * @param schainId - hash by Schain name * @return occupied space */ function getSchainsPartOfNode(bytes32 schainId) external view returns (uint8) { return schains[schainId].partOfNode; } /** * @dev getSchainListSize - gets number of created Schains at the system by owner * @param from - owner of Schain * return number of Schains */ function getSchainListSize(address from) external view returns (uint) { return schainIndexes[from].length; } /** * @dev getSchainIdsByAddress - gets array of hashes by Schain names which owned by `from` * @param from - owner of some Schains * @return array of hashes by Schain names */ function getSchainIdsByAddress(address from) external view returns (bytes32[] memory) { return schainIndexes[from]; } /** * @dev getSchainIdsForNode - returns array of hashes by Schain names, * which given Node composed * @param nodeIndex - index of Node * @return array of hashes by Schain names */ function getSchainIdsForNode(uint nodeIndex) external view returns (bytes32[] memory) { return schainsForNodes[nodeIndex]; } function getSchainOwner(bytes32 schainId) external view returns (address) { return schains[schainId].owner; } /** * @dev isSchainNameAvailable - checks is given name available * Need to delete - copy of web3.utils.soliditySha3 * @param name - possible new name of Schain * @return if available - true, else - false */ function isSchainNameAvailable(string calldata name) external view returns (bool) { bytes32 schainId = keccak256(abi.encodePacked(name)); return schains[schainId].owner == address(0); } /** * @dev isTimeExpired - checks is Schain lifetime expired * @param schainId - hash by Schain name * @return if expired - true, else - false */ function isTimeExpired(bytes32 schainId) external view returns (bool) { return uint(schains[schainId].startDate).add(schains[schainId].lifetime) < block.timestamp; } /** * @dev isOwnerAddress - checks is `from` - owner of `schainId` Schain * @param from - owner of Schain * @param schainId - hash by Schain name * @return if owner - true, else - false */ function isOwnerAddress(address from, bytes32 schainId) external view returns (bool) { return schains[schainId].owner == from; } function isSchainExist(bytes32 schainId) external view returns (bool) { return keccak256(abi.encodePacked(schains[schainId].name)) != keccak256(abi.encodePacked("")); } function getSchainName(bytes32 schainId) external view returns (string memory) { return schains[schainId].name; } function getActiveSchain(uint nodeIndex) external view returns (bytes32) { for (uint i = schainsForNodes[nodeIndex].length; i > 0; i--) { if (schainsForNodes[nodeIndex][i - 1] != bytes32(0)) { return schainsForNodes[nodeIndex][i - 1]; } } return bytes32(0); } function getActiveSchains(uint nodeIndex) external view returns (bytes32[] memory activeSchains) { uint activeAmount = 0; for (uint i = 0; i < schainsForNodes[nodeIndex].length; i++) { if (schainsForNodes[nodeIndex][i] != bytes32(0)) { activeAmount++; } } uint cursor = 0; activeSchains = new bytes32[](activeAmount); for (uint i = schainsForNodes[nodeIndex].length; i > 0; i--) { if (schainsForNodes[nodeIndex][i - 1] != bytes32(0)) { activeSchains[cursor++] = schainsForNodes[nodeIndex][i - 1]; } } } /** * @dev getNumberOfNodesInGroup - shows number of Nodes in Group * @param schainId - Groups identifier * @return number of Nodes in Group */ function getNumberOfNodesInGroup(bytes32 schainId) external view returns (uint) { return schainsGroups[schainId].length; } /** * @dev getNodesInGroup - shows Nodes in Group * @param schainId - Groups identifier * @return array of indexes of Nodes in Group */ function getNodesInGroup(bytes32 schainId) external view returns (uint[] memory) { return schainsGroups[schainId]; } /** * @dev getNodeIndexInGroup - looks for Node in Group * @param schainId - Groups identifier * @param nodeId - Nodes identifier * @return index of Node in Group */ function getNodeIndexInGroup(bytes32 schainId, uint nodeId) external view returns (uint) { for (uint index = 0; index < schainsGroups[schainId].length; index++) { if (schainsGroups[schainId][index] == nodeId) { return index; } } return schainsGroups[schainId].length; } function isAnyFreeNode(bytes32 schainId) external view returns (bool) { Nodes nodes = Nodes(contractManager.getContract("Nodes")); uint8 space = schains[schainId].partOfNode; uint[] memory nodesWithFreeSpace = nodes.getNodesWithFreeSpace(space); for (uint i = 0; i < nodesWithFreeSpace.length; i++) { if (_isCorrespond(schainId, nodesWithFreeSpace[i])) { return true; } } return false; } function checkException(bytes32 schainId, uint nodeIndex) external view returns (bool) { return _exceptionsForGroups[schainId][nodeIndex]; } function checkHoleForSchain(bytes32 schainHash, uint indexOfNode) external view returns (bool) { for (uint i = 0; i < holesForSchains[schainHash].length; i++) { if (holesForSchains[schainHash][i] == indexOfNode) { return true; } } return false; } function initialize(address newContractsAddress) public override initializer { Permissions.initialize(newContractsAddress); numberOfSchains = 0; sumOfSchainsResources = 0; } /** * @dev addSchainForNode - adds Schain hash to Node * function could be run only by executor * @param nodeIndex - index of Node * @param schainId - hash by Schain name */ function addSchainForNode(uint nodeIndex, bytes32 schainId) public allowTwo("Schains", "NodeRotation") { if (holesForNodes[nodeIndex].length == 0) { schainsForNodes[nodeIndex].push(schainId); } else { schainsForNodes[nodeIndex][holesForNodes[nodeIndex][0]] = schainId; uint min = uint(-1); uint index = 0; for (uint i = 1; i < holesForNodes[nodeIndex].length; i++) { if (min > holesForNodes[nodeIndex][i]) { min = holesForNodes[nodeIndex][i]; index = i; } } if (min == uint(-1)) { delete holesForNodes[nodeIndex]; } else { holesForNodes[nodeIndex][0] = min; holesForNodes[nodeIndex][index] = holesForNodes[nodeIndex][holesForNodes[nodeIndex].length - 1]; holesForNodes[nodeIndex].pop(); } } } /** * @dev removesSchainForNode - clean given Node of Schain * function could be run only by executor * @param nodeIndex - index of Node * @param schainIndex - index of Schain in schainsForNodes array by this Node */ function removeSchainForNode(uint nodeIndex, uint schainIndex) public allowThree("NodeRotation", "SkaleDKG", "Schains") { uint length = schainsForNodes[nodeIndex].length; if (schainIndex == length.sub(1)) { schainsForNodes[nodeIndex].pop(); } else { schainsForNodes[nodeIndex][schainIndex] = bytes32(0); if (holesForNodes[nodeIndex].length > 0 && holesForNodes[nodeIndex][0] > schainIndex) { uint hole = holesForNodes[nodeIndex][0]; holesForNodes[nodeIndex][0] = schainIndex; holesForNodes[nodeIndex].push(hole); } else { holesForNodes[nodeIndex].push(schainIndex); } } } /** * @dev getLengthOfSchainsForNode - returns number of Schains which contain given Node * @param nodeIndex - index of Node * @return number of Schains */ function getLengthOfSchainsForNode(uint nodeIndex) public view returns (uint) { return schainsForNodes[nodeIndex].length; } /** * @dev findSchainAtSchainsForNode - finds index of Schain at schainsForNode array * @param nodeIndex - index of Node at common array of Nodes * @param schainId - hash of name of Schain * @return index of Schain at schainsForNode array */ function findSchainAtSchainsForNode(uint nodeIndex, bytes32 schainId) public view returns (uint) { uint length = getLengthOfSchainsForNode(nodeIndex); for (uint i = 0; i < length; i++) { if (schainsForNodes[nodeIndex][i] == schainId) { return i; } } return length; } function isEnoughNodes(bytes32 schainId) public view returns (uint[] memory result) { Nodes nodes = Nodes(contractManager.getContract("Nodes")); uint8 space = schains[schainId].partOfNode; uint[] memory nodesWithFreeSpace = nodes.getNodesWithFreeSpace(space); uint counter = 0; for (uint i = 0; i < nodesWithFreeSpace.length; i++) { if (!_isCorrespond(schainId, nodesWithFreeSpace[i])) { counter++; } } if (counter < nodesWithFreeSpace.length) { result = new uint[](nodesWithFreeSpace.length.sub(counter)); counter = 0; for (uint i = 0; i < nodesWithFreeSpace.length; i++) { if (_isCorrespond(schainId, nodesWithFreeSpace[i])) { result[counter] = nodesWithFreeSpace[i]; counter++; } } } } /** * @dev _generateGroup - generates Group for Schain * @param schainId - index of Group */ function _generateGroup(bytes32 schainId, uint numberOfNodes) private returns (uint[] memory nodesInGroup) { Nodes nodes = Nodes(contractManager.getContract("Nodes")); uint8 space = schains[schainId].partOfNode; nodesInGroup = new uint[](numberOfNodes); uint[] memory possibleNodes = isEnoughNodes(schainId); require(possibleNodes.length >= nodesInGroup.length, "Not enough nodes to create Schain"); uint ignoringTail = 0; uint random = uint(keccak256(abi.encodePacked(uint(blockhash(block.number.sub(1))), schainId))); for (uint i = 0; i < nodesInGroup.length; ++i) { uint index = random % (possibleNodes.length.sub(ignoringTail)); uint node = possibleNodes[index]; nodesInGroup[i] = node; _swap(possibleNodes, index, possibleNodes.length.sub(ignoringTail).sub(1)); ++ignoringTail; _exceptionsForGroups[schainId][node] = true; addSchainForNode(node, schainId); require(nodes.removeSpaceFromNode(node, space), "Could not remove space from Node"); } // set generated group schainsGroups[schainId] = nodesInGroup; } function _isCorrespond(bytes32 schainId, uint nodeIndex) private view returns (bool) { Nodes nodes = Nodes(contractManager.getContract("Nodes")); return !_exceptionsForGroups[schainId][nodeIndex] && nodes.isNodeActive(nodeIndex); } function _swap(uint[] memory array, uint index1, uint index2) private pure { uint buffer = array[index1]; array[index1] = array[index2]; array[index2] = buffer; } /** * @dev findNode - find local index of Node in Schain * @param schainId - Groups identifier * @param nodeIndex - global index of Node * @return local index of Node in Schain */ function _findNode(bytes32 schainId, uint nodeIndex) private view returns (uint) { uint[] memory nodesInGroup = schainsGroups[schainId]; uint index; for (index = 0; index < nodesInGroup.length; index++) { if (nodesInGroup[index] == nodeIndex) { return index; } } return index; } } contract SkaleDKG is Permissions, ISkaleDKG { struct Channel { bool active; uint n; uint startedBlockTimestamp; } struct ProcessDKG { uint numberOfBroadcasted; uint numberOfCompleted; bool[] broadcasted; bool[] completed; uint startAlrightTimestamp; } struct ComplaintData { uint nodeToComplaint; uint fromNodeToComplaint; uint startComplaintBlockTimestamp; } uint public constant COMPLAINT_TIMELIMIT = 1800; mapping(bytes32 => Channel) public channels; mapping(bytes32 => uint) public lastSuccesfulDKG; mapping(bytes32 => ProcessDKG) public dkgProcess; mapping(bytes32 => ComplaintData) public complaints; mapping(bytes32 => uint) public startAlrightTimestamp; event ChannelOpened(bytes32 groupIndex); event ChannelClosed(bytes32 groupIndex); event BroadcastAndKeyShare( bytes32 indexed groupIndex, uint indexed fromNode, G2Operations.G2Point[] verificationVector, KeyStorage.KeyShare[] secretKeyContribution ); event AllDataReceived(bytes32 indexed groupIndex, uint nodeIndex); event SuccessfulDKG(bytes32 indexed groupIndex); event BadGuy(uint nodeIndex); event FailedDKG(bytes32 indexed groupIndex); event ComplaintSent(bytes32 indexed groupIndex, uint indexed fromNodeIndex, uint indexed toNodeIndex); event NewGuy(uint nodeIndex); event ComplaintError(string error); modifier correctGroup(bytes32 groupIndex) { require(channels[groupIndex].active, "Group is not created"); _; } modifier correctGroupWithoutRevert(bytes32 groupIndex) { if (!channels[groupIndex].active) { emit ComplaintError("Group is not created"); } else { _; } } modifier correctNode(bytes32 groupIndex, uint nodeIndex) { uint index = _nodeIndexInSchain(groupIndex, nodeIndex); require( index < channels[groupIndex].n, "Node is not in this group"); _; } function openChannel(bytes32 groupIndex) external override allowTwo("Schains","NodeRotation") { _openChannel(groupIndex); } function deleteChannel(bytes32 groupIndex) external override allow("SchainsInternal") { require(channels[groupIndex].active, "Channel is not created"); delete channels[groupIndex]; delete dkgProcess[groupIndex]; delete complaints[groupIndex]; KeyStorage(contractManager.getContract("KeyStorage")).deleteKey(groupIndex); } function broadcast( bytes32 groupIndex, uint nodeIndex, G2Operations.G2Point[] calldata verificationVector, KeyStorage.KeyShare[] calldata secretKeyContribution ) external correctGroup(groupIndex) correctNode(groupIndex, nodeIndex) { require(_isNodeByMessageSender(nodeIndex, msg.sender), "Node does not exist for message sender"); uint n = channels[groupIndex].n; require(verificationVector.length == getT(n), "Incorrect number of verification vectors"); require( secretKeyContribution.length == n, "Incorrect number of secret key shares" ); _isBroadcast( groupIndex, nodeIndex, secretKeyContribution, verificationVector ); KeyStorage keyStorage = KeyStorage(contractManager.getContract("KeyStorage")); keyStorage.adding(groupIndex, verificationVector[0]); keyStorage.computePublicValues(groupIndex, verificationVector); emit BroadcastAndKeyShare( groupIndex, nodeIndex, verificationVector, secretKeyContribution ); } function complaint(bytes32 groupIndex, uint fromNodeIndex, uint toNodeIndex) external correctGroupWithoutRevert(groupIndex) correctNode(groupIndex, fromNodeIndex) correctNode(groupIndex, toNodeIndex) { require(_isNodeByMessageSender(fromNodeIndex, msg.sender), "Node does not exist for message sender"); bool broadcasted = _isBroadcasted(groupIndex, toNodeIndex); if (broadcasted && complaints[groupIndex].nodeToComplaint == uint(-1)) { // incorrect data or missing alright if ( isEveryoneBroadcasted(groupIndex) && startAlrightTimestamp[groupIndex].add(COMPLAINT_TIMELIMIT) <= block.timestamp && !isAllDataReceived(groupIndex, toNodeIndex) ) { // missing alright _finalizeSlashing(groupIndex, toNodeIndex); } else { // incorrect data complaints[groupIndex].nodeToComplaint = toNodeIndex; complaints[groupIndex].fromNodeToComplaint = fromNodeIndex; complaints[groupIndex].startComplaintBlockTimestamp = block.timestamp; emit ComplaintSent(groupIndex, fromNodeIndex, toNodeIndex); } } else if (broadcasted && complaints[groupIndex].nodeToComplaint == toNodeIndex) { // 30 min after incorrect data complaint if (complaints[groupIndex].startComplaintBlockTimestamp.add(COMPLAINT_TIMELIMIT) <= block.timestamp) { _finalizeSlashing(groupIndex, complaints[groupIndex].nodeToComplaint); } else { emit ComplaintError("The same complaint rejected"); } } else if (!broadcasted) { // not broadcasted in 30 min if (channels[groupIndex].startedBlockTimestamp.add(COMPLAINT_TIMELIMIT) <= block.timestamp) { _finalizeSlashing(groupIndex, toNodeIndex); } else { emit ComplaintError("Complaint sent too early"); } } else { emit ComplaintError("One complaint is already sent"); } } function response( bytes32 groupIndex, uint fromNodeIndex, uint secretNumber, G2Operations.G2Point calldata multipliedShare ) external correctGroup(groupIndex) correctNode(groupIndex, fromNodeIndex) { require(complaints[groupIndex].nodeToComplaint == fromNodeIndex, "Not this Node"); require(_isNodeByMessageSender(fromNodeIndex, msg.sender), "Node does not exist for message sender"); bool verificationResult = KeyStorage(contractManager.getContract("KeyStorage")).verify( groupIndex, complaints[groupIndex].nodeToComplaint, complaints[groupIndex].fromNodeToComplaint, secretNumber, multipliedShare ); uint badNode = (verificationResult ? complaints[groupIndex].fromNodeToComplaint : complaints[groupIndex].nodeToComplaint); _finalizeSlashing(groupIndex, badNode); } function alright(bytes32 groupIndex, uint fromNodeIndex) external correctGroup(groupIndex) correctNode(groupIndex, fromNodeIndex) { require(_isNodeByMessageSender(fromNodeIndex, msg.sender), "Node does not exist for message sender"); uint index = _nodeIndexInSchain(groupIndex, fromNodeIndex); uint numberOfParticipant = channels[groupIndex].n; require(numberOfParticipant == dkgProcess[groupIndex].numberOfBroadcasted, "Still Broadcasting phase"); require(!dkgProcess[groupIndex].completed[index], "Node is already alright"); dkgProcess[groupIndex].completed[index] = true; dkgProcess[groupIndex].numberOfCompleted++; emit AllDataReceived(groupIndex, fromNodeIndex); if (dkgProcess[groupIndex].numberOfCompleted == numberOfParticipant) { _setSuccesfulDKG(groupIndex); } } function getChannelStartedTime(bytes32 groupIndex) external view returns (uint) { return channels[groupIndex].startedBlockTimestamp; } function getNumberOfBroadcasted(bytes32 groupIndex) external view returns (uint) { return dkgProcess[groupIndex].numberOfBroadcasted; } function getNumberOfCompleted(bytes32 groupIndex) external view returns (uint) { return dkgProcess[groupIndex].numberOfCompleted; } function getTimeOfLastSuccesfulDKG(bytes32 groupIndex) external view returns (uint) { return lastSuccesfulDKG[groupIndex]; } function getComplaintData(bytes32 groupIndex) external view returns (uint, uint) { return (complaints[groupIndex].fromNodeToComplaint, complaints[groupIndex].nodeToComplaint); } function getComplaintStartedTime(bytes32 groupIndex) external view returns (uint) { return complaints[groupIndex].startComplaintBlockTimestamp; } function getAlrightStartedTime(bytes32 groupIndex) external view returns (uint) { return startAlrightTimestamp[groupIndex]; } function isChannelOpened(bytes32 groupIndex) external override view returns (bool) { return channels[groupIndex].active; } function isLastDKGSuccesful(bytes32 groupIndex) external override view returns (bool) { return channels[groupIndex].startedBlockTimestamp <= lastSuccesfulDKG[groupIndex]; } function isBroadcastPossible(bytes32 groupIndex, uint nodeIndex) external view returns (bool) { uint index = _nodeIndexInSchain(groupIndex, nodeIndex); return channels[groupIndex].active && index < channels[groupIndex].n && _isNodeByMessageSender(nodeIndex, msg.sender) && !dkgProcess[groupIndex].broadcasted[index]; } function isComplaintPossible( bytes32 groupIndex, uint fromNodeIndex, uint toNodeIndex ) external view returns (bool) { uint indexFrom = _nodeIndexInSchain(groupIndex, fromNodeIndex); uint indexTo = _nodeIndexInSchain(groupIndex, toNodeIndex); bool complaintSending = ( complaints[groupIndex].nodeToComplaint == uint(-1) && dkgProcess[groupIndex].broadcasted[indexTo] ) || ( dkgProcess[groupIndex].broadcasted[indexTo] && complaints[groupIndex].startComplaintBlockTimestamp.add(COMPLAINT_TIMELIMIT) <= block.timestamp && complaints[groupIndex].nodeToComplaint == toNodeIndex ) || ( !dkgProcess[groupIndex].broadcasted[indexTo] && complaints[groupIndex].nodeToComplaint == uint(-1) && channels[groupIndex].startedBlockTimestamp.add(COMPLAINT_TIMELIMIT) <= block.timestamp ); return channels[groupIndex].active && indexFrom < channels[groupIndex].n && indexTo < channels[groupIndex].n && _isNodeByMessageSender(fromNodeIndex, msg.sender) && complaintSending; } function isAlrightPossible(bytes32 groupIndex, uint nodeIndex) external view returns (bool) { uint index = _nodeIndexInSchain(groupIndex, nodeIndex); return channels[groupIndex].active && index < channels[groupIndex].n && _isNodeByMessageSender(nodeIndex, msg.sender) && channels[groupIndex].n == dkgProcess[groupIndex].numberOfBroadcasted && !dkgProcess[groupIndex].completed[index]; } function isResponsePossible(bytes32 groupIndex, uint nodeIndex) external view returns (bool) { uint index = _nodeIndexInSchain(groupIndex, nodeIndex); return channels[groupIndex].active && index < channels[groupIndex].n && _isNodeByMessageSender(nodeIndex, msg.sender) && complaints[groupIndex].nodeToComplaint == nodeIndex; } function isNodeBroadcasted(bytes32 groupIndex, uint nodeIndex) external view returns (bool) { uint index = _nodeIndexInSchain(groupIndex, nodeIndex); return index < channels[groupIndex].n && dkgProcess[groupIndex].broadcasted[index]; } function initialize(address contractsAddress) public override initializer { Permissions.initialize(contractsAddress); } function isEveryoneBroadcasted(bytes32 groupIndex) public view returns (bool) { return channels[groupIndex].n == dkgProcess[groupIndex].numberOfBroadcasted; } function isAllDataReceived(bytes32 groupIndex, uint nodeIndex) public view returns (bool) { uint index = _nodeIndexInSchain(groupIndex, nodeIndex); return dkgProcess[groupIndex].completed[index]; } function getT(uint n) public pure returns (uint) { return n.mul(2).add(1).div(3); } function _setSuccesfulDKG(bytes32 groupIndex) internal { lastSuccesfulDKG[groupIndex] = now; channels[groupIndex].active = false; KeyStorage(contractManager.getContract("KeyStorage")).finalizePublicKey(groupIndex); emit SuccessfulDKG(groupIndex); } function _openChannel(bytes32 groupIndex) private { SchainsInternal schainsInternal = SchainsInternal( contractManager.getContract("SchainsInternal") ); uint len = schainsInternal.getNumberOfNodesInGroup(groupIndex); channels[groupIndex].active = true; channels[groupIndex].n = len; delete dkgProcess[groupIndex].completed; delete dkgProcess[groupIndex].broadcasted; dkgProcess[groupIndex].broadcasted = new bool[](len); dkgProcess[groupIndex].completed = new bool[](len); complaints[groupIndex].fromNodeToComplaint = uint(-1); complaints[groupIndex].nodeToComplaint = uint(-1); delete complaints[groupIndex].startComplaintBlockTimestamp; delete dkgProcess[groupIndex].numberOfBroadcasted; delete dkgProcess[groupIndex].numberOfCompleted; channels[groupIndex].startedBlockTimestamp = now; KeyStorage(contractManager.getContract("KeyStorage")).initPublicKeyInProgress(groupIndex); emit ChannelOpened(groupIndex); } function _finalizeSlashing(bytes32 groupIndex, uint badNode) private { NodeRotation nodeRotation = NodeRotation(contractManager.getContract("NodeRotation")); SchainsInternal schainsInternal = SchainsInternal( contractManager.getContract("SchainsInternal") ); emit BadGuy(badNode); emit FailedDKG(groupIndex); if (schainsInternal.isAnyFreeNode(groupIndex)) { uint newNode = nodeRotation.rotateNode( badNode, groupIndex, false ); emit NewGuy(newNode); } else { _openChannel(groupIndex); schainsInternal.removeNodeFromSchain( badNode, groupIndex ); channels[groupIndex].active = false; } Punisher(contractManager.getContract("Punisher")).slash( Nodes(contractManager.getContract("Nodes")).getValidatorId(badNode), SlashingTable(contractManager.getContract("SlashingTable")).getPenalty("FailedDKG") ); } function _isBroadcast( bytes32 groupIndex, uint nodeIndex, KeyStorage.KeyShare[] memory secretKeyContribution, G2Operations.G2Point[] memory verificationVector ) private { uint index = _nodeIndexInSchain(groupIndex, nodeIndex); require(!dkgProcess[groupIndex].broadcasted[index], "This node is already broadcasted"); dkgProcess[groupIndex].broadcasted[index] = true; dkgProcess[groupIndex].numberOfBroadcasted++; if (dkgProcess[groupIndex].numberOfBroadcasted == channels[groupIndex].n) { startAlrightTimestamp[groupIndex] = now; } KeyStorage(contractManager.getContract("KeyStorage")).addBroadcastedData( groupIndex, index, secretKeyContribution, verificationVector ); } function _isBroadcasted(bytes32 groupIndex, uint nodeIndex) private view returns (bool) { uint index = _nodeIndexInSchain(groupIndex, nodeIndex); return dkgProcess[groupIndex].broadcasted[index]; } function _nodeIndexInSchain(bytes32 schainId, uint nodeIndex) private view returns (uint) { return SchainsInternal(contractManager.getContract("SchainsInternal")) .getNodeIndexInGroup(schainId, nodeIndex); } function _isNodeByMessageSender(uint nodeIndex, address from) private view returns (bool) { Nodes nodes = Nodes(contractManager.getContract("Nodes")); return nodes.isNodeExist(from, nodeIndex); } } contract SkaleManager is IERC777Recipient, Permissions { IERC1820Registry private _erc1820; bytes32 constant private _TOKENS_RECIPIENT_INTERFACE_HASH = 0xb281fc8c12954d22544db45de3159a39272895b169a852b314f9cc762e44c53b; bytes32 constant public ADMIN_ROLE = keccak256("ADMIN_ROLE"); event BountyGot( uint indexed nodeIndex, address owner, uint averageDowntime, uint averageLatency, uint bounty, uint previousBlockEvent, uint time, uint gasSpend ); function tokensReceived( address, // operator address from, address to, uint256 value, bytes calldata userData, bytes calldata // operator data ) external override allow("SkaleToken") { require(to == address(this), "Receiver is incorrect"); if (userData.length > 0) { Schains schains = Schains( contractManager.getContract("Schains")); schains.addSchain(from, value, userData); } } function createNode( uint16 port, uint16 nonce, bytes4 ip, bytes4 publicIp, bytes32[2] calldata publicKey, string calldata name) external { Nodes nodes = Nodes(contractManager.getContract("Nodes")); // validators checks inside checkPossibilityCreatingNode nodes.checkPossibilityCreatingNode(msg.sender); Nodes.NodeCreationParams memory params = Nodes.NodeCreationParams({ name: name, ip: ip, publicIp: publicIp, port: port, publicKey: publicKey, nonce: nonce}); nodes.createNode(msg.sender, params); // uint nodeIndex = nodes.createNode(msg.sender, params); // Monitors monitors = Monitors(contractManager.getContract("Monitors")); // monitors.addMonitor(nodeIndex); } function nodeExit(uint nodeIndex) external { NodeRotation nodeRotation = NodeRotation(contractManager.getContract("NodeRotation")); ValidatorService validatorService = ValidatorService(contractManager.getContract("ValidatorService")); Nodes nodes = Nodes(contractManager.getContract("Nodes")); uint validatorId = nodes.getValidatorId(nodeIndex); bool permitted = (_isOwner() || nodes.isNodeExist(msg.sender, nodeIndex)); if (!permitted) { permitted = validatorService.getValidatorId(msg.sender) == validatorId; } require(permitted, "Sender is not permitted to call this function"); SchainsInternal schainsInternal = SchainsInternal(contractManager.getContract("SchainsInternal")); ConstantsHolder constants = ConstantsHolder(contractManager.getContract("ConstantsHolder")); nodeRotation.freezeSchains(nodeIndex); if (nodes.isNodeActive(nodeIndex)) { require(nodes.initExit(nodeIndex), "Initialization of node exit is failed"); } bool completed; bool isSchains = false; if (schainsInternal.getActiveSchain(nodeIndex) != bytes32(0)) { completed = nodeRotation.exitFromSchain(nodeIndex); isSchains = true; } else { completed = true; } if (completed) { require(nodes.completeExit(nodeIndex), "Finishing of node exit is failed"); nodes.changeNodeFinishTime(nodeIndex, now.add(isSchains ? constants.rotationDelay() : 0)); // Monitors monitors = Monitors(contractManager.getContract("Monitors")); // monitors.removeCheckedNodes(nodeIndex); // monitors.deleteMonitor(nodeIndex); nodes.deleteNodeForValidator(validatorId, nodeIndex); } } function deleteSchain(string calldata name) external { Schains schains = Schains(contractManager.getContract("Schains")); // schain owner checks inside deleteSchain schains.deleteSchain(msg.sender, name); } function deleteSchainByRoot(string calldata name) external onlyAdmin { Schains schains = Schains(contractManager.getContract("Schains")); schains.deleteSchainByRoot(name); } // function sendVerdict(uint fromMonitorIndex, Monitors.Verdict calldata verdict) external { // Nodes nodes = Nodes(contractManager.getContract("Nodes")); // require(nodes.isNodeExist(msg.sender, fromMonitorIndex), "Node does not exist for Message sender"); // Monitors monitors = Monitors(contractManager.getContract("Monitors")); // // additional checks for monitoring inside sendVerdict // monitors.sendVerdict(fromMonitorIndex, verdict); // } // function sendVerdicts(uint fromMonitorIndex, Monitors.Verdict[] calldata verdicts) external { // Nodes nodes = Nodes(contractManager.getContract("Nodes")); // require(nodes.isNodeExist(msg.sender, fromMonitorIndex), "Node does not exist for Message sender"); // Monitors monitors = Monitors(contractManager.getContract("Monitors")); // for (uint i = 0; i < verdicts.length; i++) { // // additional checks for monitoring inside sendVerdict // monitors.sendVerdict(fromMonitorIndex, verdicts[i]); // } // } function getBounty(uint nodeIndex) external { Nodes nodes = Nodes(contractManager.getContract("Nodes")); require(nodes.isNodeExist(msg.sender, nodeIndex), "Node does not exist for Message sender"); require(nodes.isTimeForReward(nodeIndex), "Not time for bounty"); require( nodes.isNodeActive(nodeIndex) || nodes.isNodeLeaving(nodeIndex), "Node is not Active and is not Leaving" ); Bounty bountyContract = Bounty(contractManager.getContract("Bounty")); uint averageDowntime; uint averageLatency; Monitors monitors = Monitors(contractManager.getContract("Monitors")); (averageDowntime, averageLatency) = monitors.calculateMetrics(nodeIndex); uint bounty = bountyContract.getBounty( nodeIndex, averageDowntime, averageLatency); nodes.changeNodeLastRewardDate(nodeIndex); // monitors.deleteMonitor(nodeIndex); // monitors.addMonitor(nodeIndex); if (bounty > 0) { _payBounty(bounty, nodes.getValidatorId(nodeIndex)); } _emitBountyEvent(nodeIndex, msg.sender, averageDowntime, averageLatency, bounty); } function initialize(address newContractsAddress) public override initializer { Permissions.initialize(newContractsAddress); _erc1820 = IERC1820Registry(0x1820a4B7618BdE71Dce8cdc73aAB6C95905faD24); _erc1820.setInterfaceImplementer(address(this), _TOKENS_RECIPIENT_INTERFACE_HASH, address(this)); } function _payBounty(uint bounty, uint validatorId) private returns (bool) { IERC777 skaleToken = IERC777(contractManager.getContract("SkaleToken")); Distributor distributor = Distributor(contractManager.getContract("Distributor")); // solhint-disable-next-line check-send-result skaleToken.send(address(distributor), bounty, abi.encode(validatorId)); } function _emitBountyEvent( uint nodeIndex, address from, uint averageDowntime, uint averageLatency, uint bounty ) private { Monitors monitors = Monitors(contractManager.getContract("Monitors")); uint previousBlockEvent = monitors.getLastBountyBlock(nodeIndex); monitors.setLastBountyBlock(nodeIndex); emit BountyGot( nodeIndex, from, averageDowntime, averageLatency, bounty, previousBlockEvent, block.timestamp, gasleft()); } } contract SkaleVerifier is Permissions { using Fp2Operations for Fp2Operations.Fp2Point; function verify( Fp2Operations.Fp2Point calldata signature, bytes32 hash, uint counter, uint hashA, uint hashB, G2Operations.G2Point calldata publicKey ) external view returns (bool) { if (!_checkHashToGroupWithHelper( hash, counter, hashA, hashB ) ) { return false; } uint newSignB; if (!(signature.a == 0 && signature.b == 0)) { newSignB = Fp2Operations.P.sub((signature.b % Fp2Operations.P)); } else { newSignB = signature.b; } require(G2Operations.isG1Point(signature.a, newSignB), "Sign not in G1"); require(G2Operations.isG1Point(hashA, hashB), "Hash not in G1"); G2Operations.G2Point memory g2 = G2Operations.getG2(); require( G2Operations.isG2(publicKey), "Public Key not in G2" ); return Precompiled.bn256Pairing( signature.a, newSignB, g2.x.b, g2.x.a, g2.y.b, g2.y.a, hashA, hashB, publicKey.x.b, publicKey.x.a, publicKey.y.b, publicKey.y.a ); } function initialize(address newContractsAddress) public override initializer { Permissions.initialize(newContractsAddress); } function _checkHashToGroupWithHelper( bytes32 hash, uint counter, uint hashA, uint hashB ) private pure returns (bool) { uint xCoord = uint(hash) % Fp2Operations.P; xCoord = (xCoord.add(counter)) % Fp2Operations.P; uint ySquared = addmod( mulmod(mulmod(xCoord, xCoord, Fp2Operations.P), xCoord, Fp2Operations.P), 3, Fp2Operations.P ); if (hashB < Fp2Operations.P.div(2) || mulmod(hashB, hashB, Fp2Operations.P) != ySquared || xCoord != hashA) { return false; } return true; } } contract SlashingTable is Permissions { mapping (uint => uint) private _penalties; /** * @dev Sets a penalty for a given offense * Only the owner can set penalties. * * @param offense string * @param penalty uint amount of slashing for the specified penalty */ function setPenalty(string calldata offense, uint penalty) external onlyOwner { _penalties[uint(keccak256(abi.encodePacked(offense)))] = penalty; } /** * @dev Returns the penalty for a given offense * * @param offense string * @return uint amount of slashing for the specified penalty */ function getPenalty(string calldata offense) external view returns (uint) { uint penalty = _penalties[uint(keccak256(abi.encodePacked(offense)))]; return penalty; } function initialize(address contractManagerAddress) public override initializer { Permissions.initialize(contractManagerAddress); } } contract TokenLaunchLocker is Permissions, ILocker { using MathUtils for uint; using PartialDifferences for PartialDifferences.Value; /** * @dev Emitted when an `amount` is unlocked. */ event Unlocked( address holder, uint amount ); /** * @dev Emitted when an `amount` is locked. */ event Locked( address holder, uint amount ); struct DelegatedAmountAndMonth { uint delegated; uint month; } // holder => tokens mapping (address => uint) private _locked; // holder => tokens mapping (address => PartialDifferences.Value) private _delegatedAmount; mapping (address => DelegatedAmountAndMonth) private _totalDelegatedAmount; // delegationId => tokens mapping (uint => uint) private _delegationAmount; function lock(address holder, uint amount) external allow("TokenLaunchManager") { _locked[holder] = _locked[holder].add(amount); emit Locked(holder, amount); } function handleDelegationAdd( address holder, uint delegationId, uint amount, uint month) external allow("DelegationController") { if (_locked[holder] > 0) { TimeHelpers timeHelpers = TimeHelpers(contractManager.getContract("TimeHelpers")); uint currentMonth = timeHelpers.getCurrentMonth(); uint fromLocked = amount; uint locked = _locked[holder].boundedSub(_getAndUpdateDelegatedAmount(holder, currentMonth)); if (fromLocked > locked) { fromLocked = locked; } if (fromLocked > 0) { require(_delegationAmount[delegationId] == 0, "Delegation was already added"); _addToDelegatedAmount(holder, fromLocked, month); _addToTotalDelegatedAmount(holder, fromLocked, month); _delegationAmount[delegationId] = fromLocked; } } } function handleDelegationRemoving( address holder, uint delegationId, uint month) external allow("DelegationController") { if (_delegationAmount[delegationId] > 0) { if (_locked[holder] > 0) { _removeFromDelegatedAmount(holder, _delegationAmount[delegationId], month); } delete _delegationAmount[delegationId]; } } function getAndUpdateLockedAmount(address wallet) external override returns (uint) { if (_locked[wallet] > 0) { DelegationController delegationController = DelegationController( contractManager.getContract("DelegationController")); TimeHelpers timeHelpers = TimeHelpers(contractManager.getContract("TimeHelpers")); ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); uint currentMonth = timeHelpers.getCurrentMonth(); if (_totalDelegatedSatisfiesProofOfUserCondition(wallet) && timeHelpers.calculateProofOfUseLockEndTime( _totalDelegatedAmount[wallet].month, constantsHolder.proofOfUseLockUpPeriodDays() ) <= now) { _unlock(wallet); return 0; } else { uint lockedByDelegationController = _getAndUpdateDelegatedAmount(wallet, currentMonth) .add(delegationController.getLockedInPendingDelegations(wallet)); if (_locked[wallet] > lockedByDelegationController) { return _locked[wallet].boundedSub(lockedByDelegationController); } else { return 0; } } } else { return 0; } } function getAndUpdateForbiddenForDelegationAmount(address) external override returns (uint) { return 0; } function initialize(address contractManagerAddress) public override initializer { Permissions.initialize(contractManagerAddress); } // private function _getAndUpdateDelegatedAmount(address holder, uint currentMonth) private returns (uint) { return _delegatedAmount[holder].getAndUpdateValue(currentMonth); } function _addToDelegatedAmount(address holder, uint amount, uint month) private { _delegatedAmount[holder].addToValue(amount, month); } function _removeFromDelegatedAmount(address holder, uint amount, uint month) private { _delegatedAmount[holder].subtractFromValue(amount, month); } function _addToTotalDelegatedAmount(address holder, uint amount, uint month) private { require( _totalDelegatedAmount[holder].month == 0 || _totalDelegatedAmount[holder].month <= month, "Can't add to total delegated in the past"); // do not update counter if it is big enough // because it will override month value if (!_totalDelegatedSatisfiesProofOfUserCondition(holder)) { _totalDelegatedAmount[holder].delegated = _totalDelegatedAmount[holder].delegated.add(amount); _totalDelegatedAmount[holder].month = month; } } function _unlock(address holder) private { emit Unlocked(holder, _locked[holder]); delete _locked[holder]; _deleteDelegatedAmount(holder); _deleteTotalDelegatedAmount(holder); } function _deleteDelegatedAmount(address holder) private { _delegatedAmount[holder].clear(); } function _deleteTotalDelegatedAmount(address holder) private { delete _totalDelegatedAmount[holder].delegated; delete _totalDelegatedAmount[holder].month; } function _totalDelegatedSatisfiesProofOfUserCondition(address holder) private view returns (bool) { ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); return _totalDelegatedAmount[holder].delegated.mul(100) >= _locked[holder].mul(constantsHolder.proofOfUseDelegationPercentage()); } } contract TokenLaunchManager is Permissions, IERC777Recipient { event Approved( address holder, uint amount ); /** * @dev Emitted when a `holder` retrieves `amount`. */ event TokensRetrieved( address holder, uint amount ); /** * @dev Emitted when token launch is completed. */ event TokenLaunchIsCompleted( uint timestamp ); bytes32 public constant SELLER_ROLE = keccak256("SELLER_ROLE"); IERC1820Registry private _erc1820; mapping (address => uint) public approved; bool public tokenLaunchIsCompleted; uint private _totalApproved; modifier onlySeller() { require(_isOwner() || hasRole(SELLER_ROLE, _msgSender()), "Not authorized"); _; } /** * @dev Allocates values for `walletAddress` * * Requirements: * * - token launch must not be completed * - the total approved must be less than or equal to the seller balance. * * Emits an Approved event. * * @param walletAddress address wallet address to approve transfers to * @param value uint token amount to approve transfer to */ function approveTransfer(address walletAddress, uint value) external onlySeller { require(!tokenLaunchIsCompleted, "Can't approve because token launch is completed"); _approveTransfer(walletAddress, value); require(_totalApproved <= _getBalance(), "Balance is too low"); } /** * @dev Allocates values for `walletAddresses` * * Requirements: * * - token launch must not be completed * - the input arrays must be equal in size. * - the total approved must be less than or equal to the seller balance. * * Emits an Approved event. * * @param walletAddress address[] array of wallet addresses to approve transfers to * @param value uint[] array of token amounts to approve transfer to */ function approveBatchOfTransfers(address[] calldata walletAddress, uint[] calldata value) external onlySeller { require(!tokenLaunchIsCompleted, "Can't approve because token launch is completed"); require(walletAddress.length == value.length, "Wrong input arrays length"); for (uint i = 0; i < walletAddress.length; ++i) { _approveTransfer(walletAddress[i], value[i]); } require(_totalApproved <= _getBalance(), "Balance is too low"); } /** * @dev Allow withdrawals and disallow approvals changes * * Requirements: * * - all approvals must be done * - token launch must be not completed * */ function completeTokenLaunch() external onlySeller { require(!tokenLaunchIsCompleted, "Can't complete launch because it's already completed"); tokenLaunchIsCompleted = true; emit TokenLaunchIsCompleted(now); } /** * @dev Allows the seller to update a purchaser's address in case of an error. * * Requirements: * * - the updated address must not already be in use. * * Emits an Approved event. * * @param oldAddress address token purchaser's previous address * @param newAddress address token purchaser's new address */ function changeApprovalAddress(address oldAddress, address newAddress) external onlySeller { require(!tokenLaunchIsCompleted, "Can't change approval because token launch is completed"); require(approved[newAddress] == 0, "New address is already used"); uint oldValue = approved[oldAddress]; if (oldValue > 0) { _setApprovedAmount(oldAddress, 0); _approveTransfer(newAddress, oldValue); } } /** * @dev Allows the seller to update a purchaser's amount in case of an error. * * @param wallet address of the token purchaser * @param newValue uint of the updated token amount */ function changeApprovalValue(address wallet, uint newValue) external onlySeller { require(!tokenLaunchIsCompleted, "Can't change approval because token launch is completed"); _setApprovedAmount(wallet, newValue); } /** * @dev Transfers the entire value to the sender's address. Transferred tokens * are locked for Proof-of-Use. * * Requirements: * * - token transfer must be approved. */ function retrieve() external { require(tokenLaunchIsCompleted, "Can't retrive tokens because token launch is not completed"); require(approved[_msgSender()] > 0, "Transfer is not approved"); uint value = approved[_msgSender()]; _setApprovedAmount(_msgSender(), 0); require( IERC20(contractManager.getContract("SkaleToken")).transfer(_msgSender(), value), "Error in transfer call to SkaleToken"); TokenLaunchLocker(contractManager.getContract("TokenLaunchLocker")).lock(_msgSender(), value); emit TokensRetrieved(_msgSender(), value); } /** * @dev A required callback for ERC777. */ function tokensReceived( address operator, address from, address to, uint256 amount, bytes calldata userData, bytes calldata operatorData ) external override allow("SkaleToken") // solhint-disable-next-line no-empty-blocks { } function initialize(address contractManagerAddress) public override initializer { Permissions.initialize(contractManagerAddress); tokenLaunchIsCompleted = false; _erc1820 = IERC1820Registry(0x1820a4B7618BdE71Dce8cdc73aAB6C95905faD24); _erc1820.setInterfaceImplementer(address(this), keccak256("ERC777TokensRecipient"), address(this)); } // private function _approveTransfer(address walletAddress, uint value) internal onlySeller { require(value > 0, "Value must be greater than zero"); _setApprovedAmount(walletAddress, approved[walletAddress].add(value)); emit Approved(walletAddress, value); } function _getBalance() private view returns(uint balance) { return IERC20(contractManager.getContract("SkaleToken")).balanceOf(address(this)); } function _setApprovedAmount(address wallet, uint value) private { require(wallet != address(0), "Wallet address must be non zero"); uint oldValue = approved[wallet]; if (oldValue != value) { approved[wallet] = value; if (value > oldValue) { _totalApproved = _totalApproved.add(value.sub(oldValue)); } else { _totalApproved = _totalApproved.sub(oldValue.sub(value)); } } } } contract TokenState is Permissions, ILocker { /** * @dev Emitted when a contract is added to the locker. */ event LockerWasAdded( string locker ); /** * @dev Emitted when a contract is removed from the locker. */ event LockerWasRemoved( string locker ); string[] private _lockers; /** * @dev Return and update the total locked amount of a given `holder`. * * @param holder address of the token holder * @return total locked amount */ function getAndUpdateLockedAmount(address holder) external override returns (uint) { uint locked = 0; for (uint i = 0; i < _lockers.length; ++i) { ILocker locker = ILocker(contractManager.getContract(_lockers[i])); locked = locked.add(locker.getAndUpdateLockedAmount(holder)); } return locked; } /** * @dev Return and update the total locked and un-delegatable amount of a given `holder`. * * @param holder address of the token holder * @return amount total slashed amount (non-transferable and non-delegatable) */ function getAndUpdateForbiddenForDelegationAmount(address holder) external override returns (uint amount) { uint forbidden = 0; for (uint i = 0; i < _lockers.length; ++i) { ILocker locker = ILocker(contractManager.getContract(_lockers[i])); forbidden = forbidden.add(locker.getAndUpdateForbiddenForDelegationAmount(holder)); } return forbidden; } /** * @dev Allows the Owner to remove a contract from the locker. * * Emits a LockerWasRemoved event. * * @param locker string name of contract to remove from locker */ function removeLocker(string calldata locker) external onlyOwner { uint index; bytes32 hash = keccak256(abi.encodePacked(locker)); for (index = 0; index < _lockers.length; ++index) { if (keccak256(abi.encodePacked(_lockers[index])) == hash) { break; } } if (index < _lockers.length) { if (index < _lockers.length.sub(1)) { _lockers[index] = _lockers[_lockers.length.sub(1)]; } delete _lockers[_lockers.length.sub(1)]; _lockers.pop(); emit LockerWasRemoved(locker); } } function initialize(address contractManagerAddress) public override initializer { Permissions.initialize(contractManagerAddress); addLocker("DelegationController"); addLocker("Punisher"); addLocker("TokenLaunchLocker"); } /** * @dev Allows the Owner to add a contract to the Locker. * * Emits a LockerWasAdded event. * * @param locker string name of contract to add to locker */ function addLocker(string memory locker) public onlyOwner { _lockers.push(locker); emit LockerWasAdded(locker); } } contract ValidatorService is Permissions { using ECDSA for bytes32; struct Validator { string name; address validatorAddress; address requestedAddress; string description; uint feeRate; uint registrationTime; uint minimumDelegationAmount; bool acceptNewRequests; } /** * @dev Emitted when a validator registers. */ event ValidatorRegistered( uint validatorId ); /** * @dev Emitted when a validator address changes. */ event ValidatorAddressChanged( uint validatorId, address newAddress ); event ValidatorWasEnabled( uint validatorId ); event ValidatorWasDisabled( uint validatorId ); /** * @dev Emitted when a node address is linked to a validator. */ event NodeAddressWasAdded( uint validatorId, address nodeAddress ); /** * @dev Emitted when a node address is unlinked from a validator. */ event NodeAddressWasRemoved( uint validatorId, address nodeAddress ); mapping (uint => Validator) public validators; mapping (uint => bool) private _trustedValidators; uint[] public trustedValidatorsList; // address => validatorId mapping (address => uint) private _validatorAddressToId; // address => validatorId mapping (address => uint) private _nodeAddressToValidatorId; // validatorId => nodeAddress[] mapping (uint => address[]) private _nodeAddresses; uint public numberOfValidators; bool public useWhitelist; modifier checkValidatorExists(uint validatorId) { require(validatorExists(validatorId), "Validator with such ID does not exist"); _; } /** * @dev Creates a new validator Id. * * Requirements: * * - sender must not already have registered a validator Id. * - fee rate must be between 0 - 1000‰. Note: per mille! * * Emits ValidatorRegistered event. * * @param name string * @param description string * @param feeRate uint Fee charged on delegations by the validator per mille * @param minimumDelegationAmount uint Minimum delegation amount accepted by the validator */ function registerValidator( string calldata name, string calldata description, uint feeRate, uint minimumDelegationAmount ) external returns (uint validatorId) { require(!validatorAddressExists(msg.sender), "Validator with such address already exists"); require(feeRate < 1000, "Fee rate of validator should be lower than 100%"); validatorId = ++numberOfValidators; validators[validatorId] = Validator( name, msg.sender, address(0), description, feeRate, now, minimumDelegationAmount, true ); _setValidatorAddress(validatorId, msg.sender); emit ValidatorRegistered(validatorId); } function enableValidator(uint validatorId) external checkValidatorExists(validatorId) onlyAdmin { require(!_trustedValidators[validatorId], "Validator is already enabled"); _trustedValidators[validatorId] = true; trustedValidatorsList.push(validatorId); emit ValidatorWasEnabled(validatorId); } function disableValidator(uint validatorId) external checkValidatorExists(validatorId) onlyAdmin { require(_trustedValidators[validatorId], "Validator is already disabled"); _trustedValidators[validatorId] = false; uint position = _find(trustedValidatorsList, validatorId); if (position < trustedValidatorsList.length) { trustedValidatorsList[position] = trustedValidatorsList[trustedValidatorsList.length.sub(1)]; } trustedValidatorsList.pop(); emit ValidatorWasDisabled(validatorId); } /** * @dev Owner can disable the validator whitelist. Once turned off the * whitelist cannot be re-enabled. */ function disableWhitelist() external onlyOwner { useWhitelist = false; } /** * @dev Allows a validator to request a new address. * * Requirements: * * - new address must not be null * - new address must not be already registered as a validator * * @param newValidatorAddress address */ function requestForNewAddress(address newValidatorAddress) external { require(newValidatorAddress != address(0), "New address cannot be null"); require(_validatorAddressToId[newValidatorAddress] == 0, "Address already registered"); // check Validator Exist inside getValidatorId uint validatorId = getValidatorId(msg.sender); validators[validatorId].requestedAddress = newValidatorAddress; } function confirmNewAddress(uint validatorId) external checkValidatorExists(validatorId) { require( getValidator(validatorId).requestedAddress == msg.sender, "The validator address cannot be changed because it is not the actual owner" ); delete validators[validatorId].requestedAddress; _setValidatorAddress(validatorId, msg.sender); emit ValidatorAddressChanged(validatorId, validators[validatorId].validatorAddress); } /** * @dev Links a given node address. * * Requirements: * * - the given signature must be valid. * - the address must not be assigned to a validator. * * Emits NodeAddressWasAdded event. * * @param nodeAddress address * @param sig bytes signature of validator Id by node operator. */ function linkNodeAddress(address nodeAddress, bytes calldata sig) external { // check Validator Exist inside getValidatorId uint validatorId = getValidatorId(msg.sender); require( keccak256(abi.encodePacked(validatorId)).toEthSignedMessageHash().recover(sig) == nodeAddress, "Signature is not pass" ); require(_validatorAddressToId[nodeAddress] == 0, "Node address is a validator"); _addNodeAddress(validatorId, nodeAddress); emit NodeAddressWasAdded(validatorId, nodeAddress); } /** * @dev Unlinks a given node address from a validator. * * Emits NodeAddressWasRemoved event. * * @param nodeAddress address */ function unlinkNodeAddress(address nodeAddress) external { // check Validator Exist inside getValidatorId uint validatorId = getValidatorId(msg.sender); _removeNodeAddress(validatorId, nodeAddress); emit NodeAddressWasRemoved(validatorId, nodeAddress); } function setValidatorMDA(uint minimumDelegationAmount) external { // check Validator Exist inside getValidatorId uint validatorId = getValidatorId(msg.sender); validators[validatorId].minimumDelegationAmount = minimumDelegationAmount; } /** * @dev Allows a validator to set a new validator name. * * @param newName string */ function setValidatorName(string calldata newName) external { // check Validator Exist inside getValidatorId uint validatorId = getValidatorId(msg.sender); validators[validatorId].name = newName; } /** * @dev Allows a validator to set a new validator description. * * @param newDescription string */ function setValidatorDescription(string calldata newDescription) external { // check Validator Exist inside getValidatorId uint validatorId = getValidatorId(msg.sender); validators[validatorId].description = newDescription; } /** * @dev Allows a validator to start accepting new delegation requests. * * Requirements: * * - validator must not have already enabled accepting new requests */ function startAcceptingNewRequests() external { // check Validator Exist inside getValidatorId uint validatorId = getValidatorId(msg.sender); require(!isAcceptingNewRequests(validatorId), "Accepting request is already enabled"); validators[validatorId].acceptNewRequests = true; } /** * @dev Allows a validator to stop accepting new delegation requests. * * Requirements: * * - validator must not have already stopped accepting new requests */ function stopAcceptingNewRequests() external { // check Validator Exist inside getValidatorId uint validatorId = getValidatorId(msg.sender); require(isAcceptingNewRequests(validatorId), "Accepting request is already disabled"); validators[validatorId].acceptNewRequests = false; } /** * @dev Returns the amount of validator bond. * * @param validatorId uint ID of validator to return the amount of locked funds * @return bondAmount uint the amount of self-delegated funds by the validator */ function getAndUpdateBondAmount(uint validatorId) external returns (uint) { DelegationController delegationController = DelegationController( contractManager.getContract("DelegationController") ); return delegationController.getAndUpdateDelegatedByHolderToValidatorNow( getValidator(validatorId).validatorAddress, validatorId ); } function getMyNodesAddresses() external view returns (address[] memory) { return getNodeAddresses(getValidatorId(msg.sender)); } /** * @dev Returns a list of trusted validators. * * @return uint[] trusted validators */ function getTrustedValidators() external view returns (uint[] memory) { return trustedValidatorsList; } function checkMinimumDelegation(uint validatorId, uint amount) external view checkValidatorExists(validatorId) allow("DelegationController") returns (bool) { return validators[validatorId].minimumDelegationAmount <= amount ? true : false; } function checkValidatorAddressToId(address validatorAddress, uint validatorId) external view returns (bool) { return getValidatorId(validatorAddress) == validatorId ? true : false; } function getValidatorIdByNodeAddress(address nodeAddress) external view returns (uint validatorId) { validatorId = _nodeAddressToValidatorId[nodeAddress]; require(validatorId != 0, "Node address is not assigned to a validator"); } function isAuthorizedValidator(uint validatorId) external view checkValidatorExists(validatorId) returns (bool) { return _trustedValidators[validatorId] || !useWhitelist; } function initialize(address contractManagerAddress) public override initializer { Permissions.initialize(contractManagerAddress); useWhitelist = true; } function getNodeAddresses(uint validatorId) public view returns (address[] memory) { return _nodeAddresses[validatorId]; } function validatorExists(uint validatorId) public view returns (bool) { return validatorId <= numberOfValidators && validatorId != 0; } function validatorAddressExists(address validatorAddress) public view returns (bool) { return _validatorAddressToId[validatorAddress] != 0; } function checkIfValidatorAddressExists(address validatorAddress) public view { require(validatorAddressExists(validatorAddress), "Validator with given address does not exist"); } function getValidator(uint validatorId) public view checkValidatorExists(validatorId) returns (Validator memory) { return validators[validatorId]; } function getValidatorId(address validatorAddress) public view returns (uint) { checkIfValidatorAddressExists(validatorAddress); return _validatorAddressToId[validatorAddress]; } function isAcceptingNewRequests(uint validatorId) public view checkValidatorExists(validatorId) returns (bool) { return validators[validatorId].acceptNewRequests; } // private function _setValidatorAddress(uint validatorId, address validatorAddress) private { if (_validatorAddressToId[validatorAddress] == validatorId) { return; } require(_validatorAddressToId[validatorAddress] == 0, "Address is in use by another validator"); address oldAddress = validators[validatorId].validatorAddress; delete _validatorAddressToId[oldAddress]; _nodeAddressToValidatorId[validatorAddress] = validatorId; validators[validatorId].validatorAddress = validatorAddress; _validatorAddressToId[validatorAddress] = validatorId; } function _addNodeAddress(uint validatorId, address nodeAddress) private { if (_nodeAddressToValidatorId[nodeAddress] == validatorId) { return; } require(_nodeAddressToValidatorId[nodeAddress] == 0, "Validator cannot override node address"); _nodeAddressToValidatorId[nodeAddress] = validatorId; _nodeAddresses[validatorId].push(nodeAddress); } function _removeNodeAddress(uint validatorId, address nodeAddress) private { require(_nodeAddressToValidatorId[nodeAddress] == validatorId, "Validator does not have permissions to unlink node"); delete _nodeAddressToValidatorId[nodeAddress]; for (uint i = 0; i < _nodeAddresses[validatorId].length; ++i) { if (_nodeAddresses[validatorId][i] == nodeAddress) { if (i + 1 < _nodeAddresses[validatorId].length) { _nodeAddresses[validatorId][i] = _nodeAddresses[validatorId][_nodeAddresses[validatorId].length.sub(1)]; } delete _nodeAddresses[validatorId][_nodeAddresses[validatorId].length.sub(1)]; _nodeAddresses[validatorId].pop(); break; } } } function _find(uint[] memory array, uint index) private pure returns (uint) { uint i; for (i = 0; i < array.length; i++) { if (array[i] == index) { return i; } } return array.length; } } contract Bounty is Permissions { uint public constant STAGE_LENGTH = 31558150; // 1 year uint public constant YEAR1_BOUNTY = 3850e5 * 1e18; uint public constant YEAR2_BOUNTY = 3465e5 * 1e18; uint public constant YEAR3_BOUNTY = 3080e5 * 1e18; uint public constant YEAR4_BOUNTY = 2695e5 * 1e18; uint public constant YEAR5_BOUNTY = 2310e5 * 1e18; uint public constant YEAR6_BOUNTY = 1925e5 * 1e18; uint public constant BOUNTY = 96250000 * 1e18; uint private _nextStage; uint private _stagePool; bool public bountyReduction; uint private _nodesPerRewardPeriod; uint private _nodesRemainingPerRewardPeriod; uint private _rewardPeriodFinished; function getBounty( uint nodeIndex, uint downtime, uint latency ) external allow("SkaleManager") returns (uint) { ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); Nodes nodes = Nodes(contractManager.getContract("Nodes")); _refillStagePool(constantsHolder); if (_rewardPeriodFinished <= now) { _updateNodesPerRewardPeriod(constantsHolder, nodes); } uint bounty = _calculateMaximumBountyAmount(_stagePool, _nextStage, nodeIndex, constantsHolder, nodes); bounty = _reduceBounty( bounty, nodeIndex, downtime, latency, nodes, constantsHolder ); _stagePool = _stagePool.sub(bounty); _nodesRemainingPerRewardPeriod = _nodesRemainingPerRewardPeriod.sub(1); return bounty; } function enableBountyReduction() external onlyOwner { bountyReduction = true; } function disableBountyReduction() external onlyOwner { bountyReduction = false; } function calculateNormalBounty(uint nodeIndex) external view returns (uint) { ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); Nodes nodes = Nodes(contractManager.getContract("Nodes")); uint stagePoolSize; uint nextStage; (stagePoolSize, nextStage) = _getStagePoolSize(constantsHolder); return _calculateMaximumBountyAmount( stagePoolSize, nextStage, nodeIndex, constantsHolder, nodes ); } function initialize(address contractManagerAddress) public override initializer { Permissions.initialize(contractManagerAddress); _nextStage = 0; _stagePool = 0; _rewardPeriodFinished = 0; bountyReduction = false; } // private function _calculateMaximumBountyAmount( uint stagePoolSize, uint nextStage, uint nodeIndex, ConstantsHolder constantsHolder, Nodes nodes ) private view returns (uint) { if (nodes.isNodeLeft(nodeIndex)) { return 0; } if (now < constantsHolder.launchTimestamp()) { // network is not launched // bounty is turned off return 0; } uint numberOfRewards = _getStageBeginningTimestamp(nextStage, constantsHolder) .sub(now) .div(constantsHolder.rewardPeriod()); uint numberOfRewardsPerAllNodes = numberOfRewards.mul(_nodesPerRewardPeriod); return stagePoolSize.div( numberOfRewardsPerAllNodes.add(_nodesRemainingPerRewardPeriod) ); } function _getStageBeginningTimestamp(uint stage, ConstantsHolder constantsHolder) private view returns (uint) { return constantsHolder.launchTimestamp().add(stage.mul(STAGE_LENGTH)); } function _getStagePoolSize(ConstantsHolder constantsHolder) private view returns (uint stagePool, uint nextStage) { stagePool = _stagePool; for (nextStage = _nextStage; now >= _getStageBeginningTimestamp(nextStage, constantsHolder); ++nextStage) { stagePool += _getStageReward(_nextStage); } } function _refillStagePool(ConstantsHolder constantsHolder) private { (_stagePool, _nextStage) = _getStagePoolSize(constantsHolder); } function _updateNodesPerRewardPeriod(ConstantsHolder constantsHolder, Nodes nodes) private { _nodesPerRewardPeriod = nodes.getNumberOnlineNodes(); _nodesRemainingPerRewardPeriod = _nodesPerRewardPeriod; _rewardPeriodFinished = now.add(uint(constantsHolder.rewardPeriod())); } function _getStageReward(uint stage) private pure returns (uint) { if (stage >= 6) { return BOUNTY.div(2 ** stage.sub(6).div(3)); } else { if (stage == 0) { return YEAR1_BOUNTY; } else if (stage == 1) { return YEAR2_BOUNTY; } else if (stage == 2) { return YEAR3_BOUNTY; } else if (stage == 3) { return YEAR4_BOUNTY; } else if (stage == 4) { return YEAR5_BOUNTY; } else { return YEAR6_BOUNTY; } } } function _reduceBounty( uint bounty, uint nodeIndex, uint downtime, uint latency, Nodes nodes, ConstantsHolder constants ) private returns (uint reducedBounty) { if (!bountyReduction) { return bounty; } reducedBounty = _reduceBountyByDowntime(bounty, nodeIndex, downtime, nodes, constants); if (latency > constants.allowableLatency()) { // reduce bounty because latency is too big reducedBounty = reducedBounty.mul(constants.allowableLatency()).div(latency); } if (!nodes.checkPossibilityToMaintainNode(nodes.getValidatorId(nodeIndex), nodeIndex)) { reducedBounty = reducedBounty.div(constants.MSR_REDUCING_COEFFICIENT()); } } function _reduceBountyByDowntime( uint bounty, uint nodeIndex, uint downtime, Nodes nodes, ConstantsHolder constants ) private view returns (uint reducedBounty) { reducedBounty = bounty; uint getBountyDeadline = uint(nodes.getNodeLastRewardDate(nodeIndex)) .add(constants.rewardPeriod()) .add(constants.deltaPeriod()); uint numberOfExpiredIntervals; if (now > getBountyDeadline) { numberOfExpiredIntervals = now.sub(getBountyDeadline).div(constants.checkTime()); } else { numberOfExpiredIntervals = 0; } uint normalDowntime = uint(constants.rewardPeriod()) .sub(constants.deltaPeriod()) .div(constants.checkTime()) .div(constants.DOWNTIME_THRESHOLD_PART()); uint totalDowntime = downtime.add(numberOfExpiredIntervals); if (totalDowntime > normalDowntime) { // reduce bounty because downtime is too big uint penalty = bounty .mul(totalDowntime) .div( uint(constants.rewardPeriod()).sub(constants.deltaPeriod()) .div(constants.checkTime()) ); if (bounty > penalty) { reducedBounty = bounty.sub(penalty); } else { reducedBounty = 0; } } } } contract ConstantsHolder is Permissions { // initial price for creating Node (100 SKL) uint public constant NODE_DEPOSIT = 100 * 1e18; uint8 public constant TOTAL_SPACE_ON_NODE = 128; // part of Node for Small Skale-chain (1/128 of Node) uint8 public constant SMALL_DIVISOR = 128; // part of Node for Medium Skale-chain (1/8 of Node) uint8 public constant MEDIUM_DIVISOR = 8; // part of Node for Large Skale-chain (full Node) uint8 public constant LARGE_DIVISOR = 1; // part of Node for Medium Test Skale-chain (1/4 of Node) uint8 public constant MEDIUM_TEST_DIVISOR = 4; // typically number of Nodes for Skale-chain (16 Nodes) uint public constant NUMBER_OF_NODES_FOR_SCHAIN = 16; // number of Nodes for Test Skale-chain (2 Nodes) uint public constant NUMBER_OF_NODES_FOR_TEST_SCHAIN = 2; // number of Nodes for Test Skale-chain (4 Nodes) uint public constant NUMBER_OF_NODES_FOR_MEDIUM_TEST_SCHAIN = 4; // number of seconds in one year uint32 public constant SECONDS_TO_YEAR = 31622400; // initial number of monitors uint public constant NUMBER_OF_MONITORS = 24; uint public constant OPTIMAL_LOAD_PERCENTAGE = 80; uint public constant ADJUSTMENT_SPEED = 1000; uint public constant COOLDOWN_TIME = 60; uint public constant MIN_PRICE = 10**6; uint public constant MSR_REDUCING_COEFFICIENT = 2; uint public constant DOWNTIME_THRESHOLD_PART = 30; uint public constant BOUNTY_LOCKUP_MONTHS = 3; // MSR - Minimum staking requirement uint public msr; // Reward period - 30 days (each 30 days Node would be granted for bounty) uint32 public rewardPeriod; // Allowable latency - 150000 ms by default uint32 public allowableLatency; /** * Delta period - 1 hour (1 hour before Reward period became Monitors need * to send Verdicts and 1 hour after Reward period became Node need to come * and get Bounty) */ uint32 public deltaPeriod; /** * Check time - 2 minutes (every 2 minutes monitors should check metrics * from checked nodes) */ uint public checkTime; //Need to add minimal allowed parameters for verdicts uint public launchTimestamp; uint public rotationDelay; uint public proofOfUseLockUpPeriodDays; uint public proofOfUseDelegationPercentage; uint public limitValidatorsPerDelegator; uint public firstDelegationsMonth; /** * Set reward and delta periods to new one, run only by owner. This function * only for tests. * @param newRewardPeriod - new Reward period * @param newDeltaPeriod - new Delta period */ function setPeriods(uint32 newRewardPeriod, uint32 newDeltaPeriod) external onlyOwner { require( newRewardPeriod >= newDeltaPeriod && newRewardPeriod - newDeltaPeriod >= checkTime, "Incorrect Periods" ); rewardPeriod = newRewardPeriod; deltaPeriod = newDeltaPeriod; } /** * Set new check time. This function only for tests. * @param newCheckTime - new check time */ function setCheckTime(uint newCheckTime) external onlyOwner { require(rewardPeriod - deltaPeriod >= checkTime, "Incorrect check time"); checkTime = newCheckTime; } /** * Set latency new one in ms, run only by owner. This function * only for tests. * @param newAllowableLatency - new Allowable Latency */ function setLatency(uint32 newAllowableLatency) external onlyOwner { allowableLatency = newAllowableLatency; } function setMSR(uint newMSR) external onlyOwner { msr = newMSR; } function setLaunchTimestamp(uint timestamp) external onlyOwner { require(now < launchTimestamp, "Can't set network launch timestamp because network is already launched"); launchTimestamp = timestamp; } function setRotationDelay(uint newDelay) external onlyOwner { rotationDelay = newDelay; } function setProofOfUseLockUpPeriod(uint periodDays) external onlyOwner { proofOfUseLockUpPeriodDays = periodDays; } function setProofOfUseDelegationPercentage(uint percentage) external onlyOwner { require(percentage <= 100, "Percentage value is incorrect"); proofOfUseDelegationPercentage = percentage; } function setLimitValidatorsPerDelegator(uint newLimit) external onlyOwner { limitValidatorsPerDelegator = newLimit; } function setFirstDelegationsMonth(uint month) external onlyOwner { firstDelegationsMonth = month; } /** * @dev constructor in Permissions approach * @param contractsAddress needed in Permissions constructor */ function initialize(address contractsAddress) public override initializer { Permissions.initialize(contractsAddress); msr = 0; rewardPeriod = 2592000; allowableLatency = 150000; deltaPeriod = 3600; checkTime = 300; launchTimestamp = uint(-1); rotationDelay = 12 hours; proofOfUseLockUpPeriodDays = 90; proofOfUseDelegationPercentage = 50; limitValidatorsPerDelegator = 20; firstDelegationsMonth = 8; } } contract DelegationController is Permissions, ILocker { using MathUtils for uint; using PartialDifferences for PartialDifferences.Sequence; using PartialDifferences for PartialDifferences.Value; using FractionUtils for FractionUtils.Fraction; enum State { PROPOSED, ACCEPTED, CANCELED, REJECTED, DELEGATED, UNDELEGATION_REQUESTED, COMPLETED } struct Delegation { address holder; // address of token owner uint validatorId; uint amount; uint delegationPeriod; uint created; // time of delegation creation uint started; // month when a delegation becomes active uint finished; // first month after a delegation ends string info; } struct SlashingLogEvent { FractionUtils.Fraction reducingCoefficient; uint nextMonth; } struct SlashingLog { // month => slashing event mapping (uint => SlashingLogEvent) slashes; uint firstMonth; uint lastMonth; } struct DelegationExtras { uint lastSlashingMonthBeforeDelegation; } struct SlashingEvent { FractionUtils.Fraction reducingCoefficient; uint validatorId; uint month; } struct SlashingSignal { address holder; uint penalty; } struct LockedInPending { uint amount; uint month; } struct FirstDelegationMonth { // month uint value; //validatorId => month mapping (uint => uint) byValidator; } struct ValidatorsStatistics { // number of validators uint number; //validatorId => bool - is Delegated or not mapping (uint => uint) delegated; } /** * @dev Emitted when a delegation is proposed to a validator. */ event DelegationProposed( uint delegationId ); /** * @dev Emitted when a delegation is accepted by a validator. */ event DelegationAccepted( uint delegationId ); /** * @dev Emitted when a delegation is cancelled by the delegator. */ event DelegationRequestCanceledByUser( uint delegationId ); /** * @dev Emitted when a delegation is requested to undelegate. */ event UndelegationRequested( uint delegationId ); /// @dev delegations will never be deleted to index in this array may be used like delegation id Delegation[] public delegations; // validatorId => delegationId[] mapping (uint => uint[]) public delegationsByValidator; // holder => delegationId[] mapping (address => uint[]) public delegationsByHolder; // delegationId => extras mapping(uint => DelegationExtras) private _delegationExtras; // validatorId => sequence mapping (uint => PartialDifferences.Value) private _delegatedToValidator; // validatorId => sequence mapping (uint => PartialDifferences.Sequence) private _effectiveDelegatedToValidator; // validatorId => slashing log mapping (uint => SlashingLog) private _slashesOfValidator; // holder => sequence mapping (address => PartialDifferences.Value) private _delegatedByHolder; // holder => validatorId => sequence mapping (address => mapping (uint => PartialDifferences.Value)) private _delegatedByHolderToValidator; // holder => validatorId => sequence mapping (address => mapping (uint => PartialDifferences.Sequence)) private _effectiveDelegatedByHolderToValidator; SlashingEvent[] private _slashes; // holder => index in _slashes; mapping (address => uint) private _firstUnprocessedSlashByHolder; // holder => validatorId => month mapping (address => FirstDelegationMonth) private _firstDelegationMonth; // holder => locked in pending mapping (address => LockedInPending) private _lockedInPendingDelegations; mapping (address => ValidatorsStatistics) private _numberOfValidatorsPerDelegator; /** * @dev Modifier to make a function callable only if delegation exists. */ modifier checkDelegationExists(uint delegationId) { require(delegationId < delegations.length, "Delegation does not exist"); _; } function getAndUpdateDelegatedToValidatorNow(uint validatorId) external returns (uint) { return getAndUpdateDelegatedToValidator(validatorId, _getCurrentMonth()); } function getAndUpdateDelegatedAmount(address holder) external returns (uint) { return _getAndUpdateDelegatedByHolder(holder); } function getAndUpdateEffectiveDelegatedByHolderToValidator(address holder, uint validatorId, uint month) external allow("Distributor") returns (uint effectiveDelegated) { SlashingSignal[] memory slashingSignals = _processAllSlashesWithoutSignals(holder); effectiveDelegated = _effectiveDelegatedByHolderToValidator[holder][validatorId] .getAndUpdateValueInSequence(month); _sendSlashingSignals(slashingSignals); } /** * @dev Allows a token holder to create a delegation proposal of an `amount` * and `delegationPeriod` to a `validatorId`. Delegation must be accepted * by the validator before the UTC start of the month, otherwise the * delegation will be rejected. * * The token holder may add additional information in each proposal. * * @param validatorId uint ID of validator to receive delegation proposal * @param amount uint amount of proposed delegation * @param delegationPeriod uint period of proposed delegation * @param info string extra information provided by the token holder (if any) */ function delegate( uint validatorId, uint amount, uint delegationPeriod, string calldata info ) external { ValidatorService validatorService = ValidatorService(contractManager.getContract("ValidatorService")); DelegationPeriodManager delegationPeriodManager = DelegationPeriodManager( contractManager.getContract("DelegationPeriodManager")); IERC777 skaleToken = IERC777(contractManager.getContract("SkaleToken")); TokenState tokenState = TokenState(contractManager.getContract("TokenState")); require( validatorService.checkMinimumDelegation(validatorId, amount), "Amount does not meet the validator's minimum delegation amount"); require( validatorService.isAuthorizedValidator(validatorId), "Validator is not authorized to accept delegation request"); require( delegationPeriodManager.isDelegationPeriodAllowed(delegationPeriod), "This delegation period is not allowed"); require( validatorService.isAcceptingNewRequests(validatorId), "The validator is not currently accepting new requests"); _checkIfDelegationIsAllowed(msg.sender, validatorId); SlashingSignal[] memory slashingSignals = _processAllSlashesWithoutSignals(msg.sender); uint delegationId = _addDelegation( msg.sender, validatorId, amount, delegationPeriod, info); // check that there is enough money uint holderBalance = skaleToken.balanceOf(msg.sender); uint forbiddenForDelegation = tokenState.getAndUpdateForbiddenForDelegationAmount(msg.sender); require(holderBalance >= forbiddenForDelegation, "Token holder does not have enough tokens to delegate"); emit DelegationProposed(delegationId); _sendSlashingSignals(slashingSignals); } /** * @dev See ILocker. */ function getAndUpdateLockedAmount(address wallet) external override returns (uint) { return _getAndUpdateLockedAmount(wallet); } /** * @dev See ILocker. */ function getAndUpdateForbiddenForDelegationAmount(address wallet) external override returns (uint) { return _getAndUpdateLockedAmount(wallet); } /** * @dev Allows a token holder to cancel a delegation proposal. * * Requirements: * * - the sender must be the token holder of the delegation proposal. * - the delegation must still be in a PROPOSED state. * * Emits a DelegationRequestCanceledByUser event. * * @param delegationId uint ID of delegation proposal */ function cancelPendingDelegation(uint delegationId) external checkDelegationExists(delegationId) { require(msg.sender == delegations[delegationId].holder, "Only token holders can cancel delegation request"); require(getState(delegationId) == State.PROPOSED, "Token holders are only able to cancel PROPOSED delegations"); delegations[delegationId].finished = _getCurrentMonth(); _subtractFromLockedInPendingDelegations(delegations[delegationId].holder, delegations[delegationId].amount); emit DelegationRequestCanceledByUser(delegationId); } /** * @dev Allows a validator to accept a proposed delegation. * Successful acceptance of delegations transition the tokens from a * PROPOSED state to ACCEPTED, and tokens are locked for the remainder of the * delegation period. * * Emits a DelegationAccepted event. * * @param delegationId uint ID of delegation proposal */ function acceptPendingDelegation(uint delegationId) external checkDelegationExists(delegationId) { ValidatorService validatorService = ValidatorService(contractManager.getContract("ValidatorService")); require( validatorService.checkValidatorAddressToId(msg.sender, delegations[delegationId].validatorId), "No permissions to accept request"); _checkIfDelegationIsAllowed(delegations[delegationId].holder, delegations[delegationId].validatorId); State currentState = getState(delegationId); if (currentState != State.PROPOSED) { if (currentState == State.ACCEPTED || currentState == State.DELEGATED || currentState == State.UNDELEGATION_REQUESTED || currentState == State.COMPLETED) { revert("The delegation has been already accepted"); } else if (currentState == State.CANCELED) { revert("The delegation has been cancelled by token holder"); } else if (currentState == State.REJECTED) { revert("The delegation request is outdated"); } } require(currentState == State.PROPOSED, "Cannot set delegation state to accepted"); TokenLaunchLocker tokenLaunchLocker = TokenLaunchLocker(contractManager.getContract("TokenLaunchLocker")); SlashingSignal[] memory slashingSignals = _processAllSlashesWithoutSignals(delegations[delegationId].holder); _addToAllStatistics(delegationId); tokenLaunchLocker.handleDelegationAdd( delegations[delegationId].holder, delegationId, delegations[delegationId].amount, delegations[delegationId].started); _sendSlashingSignals(slashingSignals); emit DelegationAccepted(delegationId); } /** * @dev Allows a delegator to undelegate a specific delegation. * * Requirements: * * - the sender must be the delegator. * - the delegation must be in DELEGATED state. * * Emits an UndelegationRequested event. * * @param delegationId uint ID of delegation to undelegate */ function requestUndelegation(uint delegationId) external checkDelegationExists(delegationId) { require(getState(delegationId) == State.DELEGATED, "Cannot request undelegation"); ValidatorService validatorService = ValidatorService(contractManager.getContract("ValidatorService")); require( delegations[delegationId].holder == msg.sender || (validatorService.validatorAddressExists(msg.sender) && delegations[delegationId].validatorId == validatorService.getValidatorId(msg.sender)), "Permission denied to request undelegation"); TokenLaunchLocker tokenLaunchLocker = TokenLaunchLocker(contractManager.getContract("TokenLaunchLocker")); DelegationPeriodManager delegationPeriodManager = DelegationPeriodManager( contractManager.getContract("DelegationPeriodManager")); _removeValidatorFromValidatorsPerDelegators( delegations[delegationId].holder, delegations[delegationId].validatorId ); processAllSlashes(msg.sender); delegations[delegationId].finished = _calculateDelegationEndMonth(delegationId); uint amountAfterSlashing = _calculateDelegationAmountAfterSlashing(delegationId); _removeFromDelegatedToValidator( delegations[delegationId].validatorId, amountAfterSlashing, delegations[delegationId].finished); _removeFromDelegatedByHolder( delegations[delegationId].holder, amountAfterSlashing, delegations[delegationId].finished); _removeFromDelegatedByHolderToValidator( delegations[delegationId].holder, delegations[delegationId].validatorId, amountAfterSlashing, delegations[delegationId].finished); uint effectiveAmount = amountAfterSlashing.mul(delegationPeriodManager.stakeMultipliers( delegations[delegationId].delegationPeriod)); _removeFromEffectiveDelegatedToValidator( delegations[delegationId].validatorId, effectiveAmount, delegations[delegationId].finished); _removeFromEffectiveDelegatedByHolderToValidator( delegations[delegationId].holder, delegations[delegationId].validatorId, effectiveAmount, delegations[delegationId].finished); tokenLaunchLocker.handleDelegationRemoving( delegations[delegationId].holder, delegationId, delegations[delegationId].finished); emit UndelegationRequested(delegationId); } /** * @dev Allows the Punisher to confiscate an `amount` of stake from * `validatorId` by slashing. This slashes all delegations of the validator, * which reduces the amount that the validator has staked. This consequence * may force the SKALE Manger to reduce the number of nodes a validator is * operating so the validator can meet the Minimum Staking Requirement. * * See Punisher. * * Emits a SlashingEvent. * * @param validatorId uint validator to slash * @param amount uint amount to slash * */ function confiscate(uint validatorId, uint amount) external allow("Punisher") { uint currentMonth = _getCurrentMonth(); FractionUtils.Fraction memory coefficient = _delegatedToValidator[validatorId].reduceValue(amount, currentMonth); _effectiveDelegatedToValidator[validatorId].reduceSequence(coefficient, currentMonth); _putToSlashingLog(_slashesOfValidator[validatorId], coefficient, currentMonth); _slashes.push(SlashingEvent({reducingCoefficient: coefficient, validatorId: validatorId, month: currentMonth})); } function getAndUpdateEffectiveDelegatedToValidator(uint validatorId, uint month) external allow("Distributor") returns (uint) { return _effectiveDelegatedToValidator[validatorId].getAndUpdateValueInSequence(month); } function getAndUpdateDelegatedByHolderToValidatorNow(address holder, uint validatorId) external returns (uint) { return _getAndUpdateDelegatedByHolderToValidator(holder, validatorId, _getCurrentMonth()); } function getDelegation(uint delegationId) external view checkDelegationExists(delegationId) returns (Delegation memory) { return delegations[delegationId]; } function getFirstDelegationMonth(address holder, uint validatorId) external view returns(uint) { return _firstDelegationMonth[holder].byValidator[validatorId]; } function getDelegationsByValidatorLength(uint validatorId) external view returns (uint) { return delegationsByValidator[validatorId].length; } function getDelegationsByHolderLength(address holder) external view returns (uint) { return delegationsByHolder[holder].length; } function initialize(address contractsAddress) public override initializer { Permissions.initialize(contractsAddress); } function getAndUpdateDelegatedToValidator(uint validatorId, uint month) public allow("Nodes") returns (uint) { return _delegatedToValidator[validatorId].getAndUpdateValue(month); } function processSlashes(address holder, uint limit) public { _sendSlashingSignals(_processSlashesWithoutSignals(holder, limit)); } function processAllSlashes(address holder) public { processSlashes(holder, 0); } /** * @dev Returns the token state of a given delegation. * * @param delegationId uint ID of the delegation */ function getState(uint delegationId) public view checkDelegationExists(delegationId) returns (State state) { if (delegations[delegationId].started == 0) { if (delegations[delegationId].finished == 0) { TimeHelpers timeHelpers = TimeHelpers(contractManager.getContract("TimeHelpers")); if (_getCurrentMonth() == timeHelpers.timestampToMonth(delegations[delegationId].created)) { return State.PROPOSED; } else { return State.REJECTED; } } else { return State.CANCELED; } } else { if (_getCurrentMonth() < delegations[delegationId].started) { return State.ACCEPTED; } else { if (delegations[delegationId].finished == 0) { return State.DELEGATED; } else { if (_getCurrentMonth() < delegations[delegationId].finished) { return State.UNDELEGATION_REQUESTED; } else { return State.COMPLETED; } } } } } function getLockedInPendingDelegations(address holder) public view returns (uint) { uint currentMonth = _getCurrentMonth(); if (_lockedInPendingDelegations[holder].month < currentMonth) { return 0; } else { return _lockedInPendingDelegations[holder].amount; } } function hasUnprocessedSlashes(address holder) public view returns (bool) { return _everDelegated(holder) && _firstUnprocessedSlashByHolder[holder] < _slashes.length; } // private function _addDelegation( address holder, uint validatorId, uint amount, uint delegationPeriod, string memory info ) private returns (uint delegationId) { delegationId = delegations.length; delegations.push(Delegation( holder, validatorId, amount, delegationPeriod, now, 0, 0, info )); delegationsByValidator[validatorId].push(delegationId); delegationsByHolder[holder].push(delegationId); _addToLockedInPendingDelegations(delegations[delegationId].holder, delegations[delegationId].amount); } function _calculateDelegationEndMonth(uint delegationId) private view returns (uint) { uint currentMonth = _getCurrentMonth(); uint started = delegations[delegationId].started; if (currentMonth < started) { return started.add(delegations[delegationId].delegationPeriod); } else { uint completedPeriods = currentMonth.sub(started).div(delegations[delegationId].delegationPeriod); return started.add(completedPeriods.add(1).mul(delegations[delegationId].delegationPeriod)); } } function _addToDelegatedToValidator(uint validatorId, uint amount, uint month) private { _delegatedToValidator[validatorId].addToValue(amount, month); } function _addToEffectiveDelegatedToValidator(uint validatorId, uint effectiveAmount, uint month) private { _effectiveDelegatedToValidator[validatorId].addToSequence(effectiveAmount, month); } function _addToDelegatedByHolder(address holder, uint amount, uint month) private { _delegatedByHolder[holder].addToValue(amount, month); } function _addToDelegatedByHolderToValidator( address holder, uint validatorId, uint amount, uint month) private { _delegatedByHolderToValidator[holder][validatorId].addToValue(amount, month); } function _addValidatorToValidatorsPerDelegators(address holder, uint validatorId) private { if (_numberOfValidatorsPerDelegator[holder].delegated[validatorId] == 0) { _numberOfValidatorsPerDelegator[holder].number = _numberOfValidatorsPerDelegator[holder].number.add(1); } _numberOfValidatorsPerDelegator[holder]. delegated[validatorId] = _numberOfValidatorsPerDelegator[holder].delegated[validatorId].add(1); } function _removeFromDelegatedByHolder(address holder, uint amount, uint month) private { _delegatedByHolder[holder].subtractFromValue(amount, month); } function _removeFromDelegatedByHolderToValidator( address holder, uint validatorId, uint amount, uint month) private { _delegatedByHolderToValidator[holder][validatorId].subtractFromValue(amount, month); } function _removeValidatorFromValidatorsPerDelegators(address holder, uint validatorId) private { if (_numberOfValidatorsPerDelegator[holder].delegated[validatorId] == 1) { _numberOfValidatorsPerDelegator[holder].number = _numberOfValidatorsPerDelegator[holder].number.sub(1); } _numberOfValidatorsPerDelegator[holder]. delegated[validatorId] = _numberOfValidatorsPerDelegator[holder].delegated[validatorId].sub(1); } function _addToEffectiveDelegatedByHolderToValidator( address holder, uint validatorId, uint effectiveAmount, uint month) private { _effectiveDelegatedByHolderToValidator[holder][validatorId].addToSequence(effectiveAmount, month); } function _removeFromEffectiveDelegatedByHolderToValidator( address holder, uint validatorId, uint effectiveAmount, uint month) private { _effectiveDelegatedByHolderToValidator[holder][validatorId].subtractFromSequence(effectiveAmount, month); } function _getAndUpdateDelegatedByHolder(address holder) private returns (uint) { uint currentMonth = _getCurrentMonth(); processAllSlashes(holder); return _delegatedByHolder[holder].getAndUpdateValue(currentMonth); } function _getAndUpdateDelegatedByHolderToValidator( address holder, uint validatorId, uint month) private returns (uint) { return _delegatedByHolderToValidator[holder][validatorId].getAndUpdateValue(month); } function _addToLockedInPendingDelegations(address holder, uint amount) private returns (uint) { uint currentMonth = _getCurrentMonth(); if (_lockedInPendingDelegations[holder].month < currentMonth) { _lockedInPendingDelegations[holder].amount = amount; _lockedInPendingDelegations[holder].month = currentMonth; } else { assert(_lockedInPendingDelegations[holder].month == currentMonth); _lockedInPendingDelegations[holder].amount = _lockedInPendingDelegations[holder].amount.add(amount); } } function _subtractFromLockedInPendingDelegations(address holder, uint amount) private returns (uint) { uint currentMonth = _getCurrentMonth(); require( _lockedInPendingDelegations[holder].month == currentMonth, "There are no delegation requests this month"); require(_lockedInPendingDelegations[holder].amount >= amount, "Unlocking amount is too big"); _lockedInPendingDelegations[holder].amount = _lockedInPendingDelegations[holder].amount.sub(amount); } function _getCurrentMonth() private view returns (uint) { TimeHelpers timeHelpers = TimeHelpers(contractManager.getContract("TimeHelpers")); return timeHelpers.getCurrentMonth(); } function _getAndUpdateLockedAmount(address wallet) private returns (uint) { return _getAndUpdateDelegatedByHolder(wallet).add(getLockedInPendingDelegations(wallet)); } function _updateFirstDelegationMonth(address holder, uint validatorId, uint month) private { if (_firstDelegationMonth[holder].value == 0) { _firstDelegationMonth[holder].value = month; _firstUnprocessedSlashByHolder[holder] = _slashes.length; } if (_firstDelegationMonth[holder].byValidator[validatorId] == 0) { _firstDelegationMonth[holder].byValidator[validatorId] = month; } } function _everDelegated(address holder) private view returns (bool) { return _firstDelegationMonth[holder].value > 0; } function _removeFromDelegatedToValidator(uint validatorId, uint amount, uint month) private { _delegatedToValidator[validatorId].subtractFromValue(amount, month); } function _removeFromEffectiveDelegatedToValidator(uint validatorId, uint effectiveAmount, uint month) private { _effectiveDelegatedToValidator[validatorId].subtractFromSequence(effectiveAmount, month); } function _calculateDelegationAmountAfterSlashing(uint delegationId) private view returns (uint) { uint startMonth = _delegationExtras[delegationId].lastSlashingMonthBeforeDelegation; uint validatorId = delegations[delegationId].validatorId; uint amount = delegations[delegationId].amount; if (startMonth == 0) { startMonth = _slashesOfValidator[validatorId].firstMonth; if (startMonth == 0) { return amount; } } for (uint i = startMonth; i > 0 && i < delegations[delegationId].finished; i = _slashesOfValidator[validatorId].slashes[i].nextMonth) { if (i >= delegations[delegationId].started) { amount = amount .mul(_slashesOfValidator[validatorId].slashes[i].reducingCoefficient.numerator) .div(_slashesOfValidator[validatorId].slashes[i].reducingCoefficient.denominator); } } return amount; } function _putToSlashingLog( SlashingLog storage log, FractionUtils.Fraction memory coefficient, uint month) private { if (log.firstMonth == 0) { log.firstMonth = month; log.lastMonth = month; log.slashes[month].reducingCoefficient = coefficient; log.slashes[month].nextMonth = 0; } else { require(log.lastMonth <= month, "Cannot put slashing event in the past"); if (log.lastMonth == month) { log.slashes[month].reducingCoefficient = log.slashes[month].reducingCoefficient.multiplyFraction(coefficient); } else { log.slashes[month].reducingCoefficient = coefficient; log.slashes[month].nextMonth = 0; log.slashes[log.lastMonth].nextMonth = month; log.lastMonth = month; } } } function _processSlashesWithoutSignals(address holder, uint limit) private returns (SlashingSignal[] memory slashingSignals) { if (hasUnprocessedSlashes(holder)) { uint index = _firstUnprocessedSlashByHolder[holder]; uint end = _slashes.length; if (limit > 0 && index.add(limit) < end) { end = index.add(limit); } slashingSignals = new SlashingSignal[](end.sub(index)); uint begin = index; for (; index < end; ++index) { uint validatorId = _slashes[index].validatorId; uint month = _slashes[index].month; uint oldValue = _getAndUpdateDelegatedByHolderToValidator(holder, validatorId, month); if (oldValue.muchGreater(0)) { _delegatedByHolderToValidator[holder][validatorId].reduceValueByCoefficientAndUpdateSum( _delegatedByHolder[holder], _slashes[index].reducingCoefficient, month); _effectiveDelegatedByHolderToValidator[holder][validatorId].reduceSequence( _slashes[index].reducingCoefficient, month); slashingSignals[index.sub(begin)].holder = holder; slashingSignals[index.sub(begin)].penalty = oldValue.boundedSub(_getAndUpdateDelegatedByHolderToValidator(holder, validatorId, month)); } } _firstUnprocessedSlashByHolder[holder] = end; } } function _processAllSlashesWithoutSignals(address holder) private returns (SlashingSignal[] memory slashingSignals) { return _processSlashesWithoutSignals(holder, 0); } function _sendSlashingSignals(SlashingSignal[] memory slashingSignals) private { Punisher punisher = Punisher(contractManager.getContract("Punisher")); address previousHolder = address(0); uint accumulatedPenalty = 0; for (uint i = 0; i < slashingSignals.length; ++i) { if (slashingSignals[i].holder != previousHolder) { if (accumulatedPenalty > 0) { punisher.handleSlash(previousHolder, accumulatedPenalty); } previousHolder = slashingSignals[i].holder; accumulatedPenalty = slashingSignals[i].penalty; } else { accumulatedPenalty = accumulatedPenalty.add(slashingSignals[i].penalty); } } if (accumulatedPenalty > 0) { punisher.handleSlash(previousHolder, accumulatedPenalty); } } function _addToAllStatistics(uint delegationId) private { DelegationPeriodManager delegationPeriodManager = DelegationPeriodManager( contractManager.getContract("DelegationPeriodManager")); uint currentMonth = _getCurrentMonth(); delegations[delegationId].started = currentMonth.add(1); if (_slashesOfValidator[delegations[delegationId].validatorId].lastMonth > 0) { _delegationExtras[delegationId].lastSlashingMonthBeforeDelegation = _slashesOfValidator[delegations[delegationId].validatorId].lastMonth; } _addToDelegatedToValidator( delegations[delegationId].validatorId, delegations[delegationId].amount, currentMonth.add(1)); _addToDelegatedByHolder( delegations[delegationId].holder, delegations[delegationId].amount, currentMonth.add(1)); _addToDelegatedByHolderToValidator( delegations[delegationId].holder, delegations[delegationId].validatorId, delegations[delegationId].amount, currentMonth.add(1)); _updateFirstDelegationMonth( delegations[delegationId].holder, delegations[delegationId].validatorId, currentMonth.add(1)); uint effectiveAmount = delegations[delegationId].amount.mul(delegationPeriodManager.stakeMultipliers( delegations[delegationId].delegationPeriod)); _addToEffectiveDelegatedToValidator( delegations[delegationId].validatorId, effectiveAmount, currentMonth.add(1)); _addToEffectiveDelegatedByHolderToValidator( delegations[delegationId].holder, delegations[delegationId].validatorId, effectiveAmount, currentMonth.add(1)); _addValidatorToValidatorsPerDelegators( delegations[delegationId].holder, delegations[delegationId].validatorId ); } function _checkIfDelegationIsAllowed(address holder, uint validatorId) private view returns (bool) { ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); require( _numberOfValidatorsPerDelegator[holder].delegated[validatorId] > 0 || ( _numberOfValidatorsPerDelegator[holder].delegated[validatorId] == 0 && _numberOfValidatorsPerDelegator[holder].number < constantsHolder.limitValidatorsPerDelegator() ), "Limit of validators is reached" ); require( _getCurrentMonth() >= constantsHolder.firstDelegationsMonth(), "Delegations are not allowed" ); } } contract DelegationPeriodManager is Permissions { /** * @dev Emitted when a new delegation period is specified. */ event DelegationPeriodWasSet( uint length, uint stakeMultiplier ); mapping (uint => uint) public stakeMultipliers; /** * @dev Creates a new available delegation period and return in the network. * Only the owner may set new delegation period and returns in the network. * * Emits a DelegationPeriodWasSet event. * * @param monthsCount uint delegation duration in months * @param stakeMultiplier uint return for delegation */ function setDelegationPeriod(uint monthsCount, uint stakeMultiplier) external onlyOwner { stakeMultipliers[monthsCount] = stakeMultiplier; emit DelegationPeriodWasSet(monthsCount, stakeMultiplier); } /** * @dev Checks whether given delegation period is allowed. * * @param monthsCount uint delegation duration in months * @return bool True if delegation period is allowed */ function isDelegationPeriodAllowed(uint monthsCount) external view returns (bool) { return stakeMultipliers[monthsCount] != 0 ? true : false; } /** * @dev Initial delegation period and multiplier settings. */ function initialize(address contractsAddress) public override initializer { Permissions.initialize(contractsAddress); stakeMultipliers[3] = 100; // 3 months at 100 // stakeMultipliers[6] = 150; // 6 months at 150 // stakeMultipliers[12] = 200; // 12 months at 200 } } contract Distributor is Permissions, IERC777Recipient { using MathUtils for uint; /** * @dev Emitted when a bounty is withdrawn by the token holder. */ event WithdrawBounty( address holder, uint validatorId, address destination, uint amount ); /** * @dev Emitted when a validator fee is withdrawn by the validator. */ event WithdrawFee( uint validatorId, address destination, uint amount ); /** * @dev Emitted when a bounty is distributed. */ event BountyWasPaid( uint validatorId, uint amount ); IERC1820Registry private _erc1820; // validatorId => month => token mapping (uint => mapping (uint => uint)) private _bountyPaid; // validatorId => month => token mapping (uint => mapping (uint => uint)) private _feePaid; // holder => validatorId => month mapping (address => mapping (uint => uint)) private _firstUnwithdrawnMonth; // validatorId => month mapping (uint => uint) private _firstUnwithdrawnMonthForValidator; function getAndUpdateEarnedBountyAmount(uint validatorId) external returns (uint earned, uint endMonth) { return getAndUpdateEarnedBountyAmountOf(msg.sender, validatorId); } function withdrawBounty(uint validatorId, address to) external { TimeHelpers timeHelpers = TimeHelpers(contractManager.getContract("TimeHelpers")); ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); require(now >= timeHelpers.addMonths( constantsHolder.launchTimestamp(), constantsHolder.BOUNTY_LOCKUP_MONTHS() ), "Bounty is locked"); uint bounty; uint endMonth; (bounty, endMonth) = getAndUpdateEarnedBountyAmountOf(msg.sender, validatorId); _firstUnwithdrawnMonth[msg.sender][validatorId] = endMonth; IERC20 skaleToken = IERC20(contractManager.getContract("SkaleToken")); require(skaleToken.transfer(to, bounty), "Failed to transfer tokens"); emit WithdrawBounty( msg.sender, validatorId, to, bounty ); } function withdrawFee(address to) external { ValidatorService validatorService = ValidatorService(contractManager.getContract("ValidatorService")); IERC20 skaleToken = IERC20(contractManager.getContract("SkaleToken")); TimeHelpers timeHelpers = TimeHelpers(contractManager.getContract("TimeHelpers")); ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); require(now >= timeHelpers.addMonths( constantsHolder.launchTimestamp(), constantsHolder.BOUNTY_LOCKUP_MONTHS() ), "Bounty is locked"); // check Validator Exist inside getValidatorId uint validatorId = validatorService.getValidatorId(msg.sender); uint fee; uint endMonth; (fee, endMonth) = getEarnedFeeAmountOf(validatorId); _firstUnwithdrawnMonthForValidator[validatorId] = endMonth; require(skaleToken.transfer(to, fee), "Failed to transfer tokens"); emit WithdrawFee( validatorId, to, fee ); } function tokensReceived( address, address, address to, uint256 amount, bytes calldata userData, bytes calldata ) external override allow("SkaleToken") { require(to == address(this), "Receiver is incorrect"); require(userData.length == 32, "Data length is incorrect"); uint validatorId = abi.decode(userData, (uint)); _distributeBounty(amount, validatorId); } function getEarnedFeeAmount() external view returns (uint earned, uint endMonth) { ValidatorService validatorService = ValidatorService(contractManager.getContract("ValidatorService")); return getEarnedFeeAmountOf(validatorService.getValidatorId(msg.sender)); } function initialize(address contractsAddress) public override initializer { Permissions.initialize(contractsAddress); _erc1820 = IERC1820Registry(0x1820a4B7618BdE71Dce8cdc73aAB6C95905faD24); _erc1820.setInterfaceImplementer(address(this), keccak256("ERC777TokensRecipient"), address(this)); } function getAndUpdateEarnedBountyAmountOf(address wallet, uint validatorId) public returns (uint earned, uint endMonth) { DelegationController delegationController = DelegationController( contractManager.getContract("DelegationController")); TimeHelpers timeHelpers = TimeHelpers(contractManager.getContract("TimeHelpers")); uint currentMonth = timeHelpers.getCurrentMonth(); uint startMonth = _firstUnwithdrawnMonth[wallet][validatorId]; if (startMonth == 0) { startMonth = delegationController.getFirstDelegationMonth(wallet, validatorId); if (startMonth == 0) { return (0, 0); } } earned = 0; endMonth = currentMonth; if (endMonth > startMonth.add(12)) { endMonth = startMonth.add(12); } for (uint i = startMonth; i < endMonth; ++i) { uint effectiveDelegatedToValidator = delegationController.getAndUpdateEffectiveDelegatedToValidator(validatorId, i); if (effectiveDelegatedToValidator.muchGreater(0)) { earned = earned.add( _bountyPaid[validatorId][i].mul( delegationController.getAndUpdateEffectiveDelegatedByHolderToValidator(wallet, validatorId, i)) .div(effectiveDelegatedToValidator) ); } } } function getEarnedFeeAmountOf(uint validatorId) public view returns (uint earned, uint endMonth) { TimeHelpers timeHelpers = TimeHelpers(contractManager.getContract("TimeHelpers")); uint currentMonth = timeHelpers.getCurrentMonth(); uint startMonth = _firstUnwithdrawnMonthForValidator[validatorId]; if (startMonth == 0) { return (0, 0); } earned = 0; endMonth = currentMonth; if (endMonth > startMonth.add(12)) { endMonth = startMonth.add(12); } for (uint i = startMonth; i < endMonth; ++i) { earned = earned.add(_feePaid[validatorId][i]); } } // private function _distributeBounty(uint amount, uint validatorId) private { TimeHelpers timeHelpers = TimeHelpers(contractManager.getContract("TimeHelpers")); ValidatorService validatorService = ValidatorService(contractManager.getContract("ValidatorService")); uint currentMonth = timeHelpers.getCurrentMonth(); uint feeRate = validatorService.getValidator(validatorId).feeRate; uint fee = amount.mul(feeRate).div(1000); uint bounty = amount.sub(fee); _bountyPaid[validatorId][currentMonth] = _bountyPaid[validatorId][currentMonth].add(bounty); _feePaid[validatorId][currentMonth] = _feePaid[validatorId][currentMonth].add(fee); if (_firstUnwithdrawnMonthForValidator[validatorId] == 0) { _firstUnwithdrawnMonthForValidator[validatorId] = currentMonth; } emit BountyWasPaid(validatorId, amount); } } contract KeyStorage is Permissions { using Fp2Operations for Fp2Operations.Fp2Point; using G2Operations for G2Operations.G2Point; struct BroadcastedData { KeyShare[] secretKeyContribution; G2Operations.G2Point[] verificationVector; } struct KeyShare { bytes32[2] publicKey; bytes32 share; } mapping(bytes32 => mapping(uint => BroadcastedData)) private _data; mapping(bytes32 => G2Operations.G2Point) private _publicKeysInProgress; mapping(bytes32 => G2Operations.G2Point) private _schainsPublicKeys; mapping(bytes32 => G2Operations.G2Point[]) private _schainsNodesPublicKeys; mapping(bytes32 => G2Operations.G2Point[]) private _previousSchainsPublicKeys; function addBroadcastedData( bytes32 groupIndex, uint indexInSchain, KeyShare[] memory secretKeyContribution, G2Operations.G2Point[] memory verificationVector ) external allow("SkaleDKG") { for (uint i = 0; i < secretKeyContribution.length; ++i) { if (i < _data[groupIndex][indexInSchain].secretKeyContribution.length) { _data[groupIndex][indexInSchain].secretKeyContribution[i] = secretKeyContribution[i]; } else { _data[groupIndex][indexInSchain].secretKeyContribution.push(secretKeyContribution[i]); } } while (_data[groupIndex][indexInSchain].secretKeyContribution.length > secretKeyContribution.length) { _data[groupIndex][indexInSchain].secretKeyContribution.pop(); } for (uint i = 0; i < verificationVector.length; ++i) { if (i < _data[groupIndex][indexInSchain].verificationVector.length) { _data[groupIndex][indexInSchain].verificationVector[i] = verificationVector[i]; } else { _data[groupIndex][indexInSchain].verificationVector.push(verificationVector[i]); } } while (_data[groupIndex][indexInSchain].verificationVector.length > verificationVector.length) { _data[groupIndex][indexInSchain].verificationVector.pop(); } } function deleteKey(bytes32 groupIndex) external allow("SkaleDKG") { _previousSchainsPublicKeys[groupIndex].push(_schainsPublicKeys[groupIndex]); delete _schainsPublicKeys[groupIndex]; } function initPublicKeyInProgress(bytes32 groupIndex) external allow("SkaleDKG") { _publicKeysInProgress[groupIndex] = G2Operations.getG2Zero(); delete _schainsNodesPublicKeys[groupIndex]; } function adding(bytes32 groupIndex, G2Operations.G2Point memory value) external allow("SkaleDKG") { require(value.isG2(), "Incorrect g2 point"); _publicKeysInProgress[groupIndex] = value.addG2(_publicKeysInProgress[groupIndex]); } function finalizePublicKey(bytes32 groupIndex) external allow("SkaleDKG") { if (!_isSchainsPublicKeyZero(groupIndex)) { _previousSchainsPublicKeys[groupIndex].push(_schainsPublicKeys[groupIndex]); } _schainsPublicKeys[groupIndex] = _publicKeysInProgress[groupIndex]; delete _publicKeysInProgress[groupIndex]; } function computePublicValues(bytes32 groupIndex, G2Operations.G2Point[] calldata verificationVector) external allow("SkaleDKG") { if (_schainsNodesPublicKeys[groupIndex].length == 0) { for (uint i = 0; i < verificationVector.length; ++i) { require(verificationVector[i].isG2(), "Incorrect g2 point verVec 1"); G2Operations.G2Point memory tmp = verificationVector[i]; _schainsNodesPublicKeys[groupIndex].push(tmp); require(_schainsNodesPublicKeys[groupIndex][i].isG2(), "Incorrect g2 point schainNodesPubKey 1"); } while (_schainsNodesPublicKeys[groupIndex].length > verificationVector.length) { _schainsNodesPublicKeys[groupIndex].pop(); } } else { require(_schainsNodesPublicKeys[groupIndex].length == verificationVector.length, "Incorrect length"); for (uint i = 0; i < _schainsNodesPublicKeys[groupIndex].length; ++i) { require(verificationVector[i].isG2(), "Incorrect g2 point verVec 2"); require(_schainsNodesPublicKeys[groupIndex][i].isG2(), "Incorrect g2 point schainNodesPubKey 2"); _schainsNodesPublicKeys[groupIndex][i] = verificationVector[i].addG2( _schainsNodesPublicKeys[groupIndex][i] ); require(_schainsNodesPublicKeys[groupIndex][i].isG2(), "Incorrect g2 point addition"); } } } function verify( bytes32 groupIndex, uint nodeToComplaint, uint fromNodeToComplaint, uint secretNumber, G2Operations.G2Point memory multipliedShare ) external view returns (bool) { SchainsInternal schainsInternal = SchainsInternal(contractManager.getContract("SchainsInternal")); uint index = schainsInternal.getNodeIndexInGroup(groupIndex, nodeToComplaint); uint secret = _decryptMessage(groupIndex, secretNumber, nodeToComplaint, fromNodeToComplaint); G2Operations.G2Point[] memory verificationVector = _data[groupIndex][index].verificationVector; G2Operations.G2Point memory value = G2Operations.getG2Zero(); G2Operations.G2Point memory tmp = G2Operations.getG2Zero(); if (multipliedShare.isG2()) { for (uint i = 0; i < verificationVector.length; i++) { tmp = verificationVector[i].mulG2(index.add(1) ** i); value = tmp.addG2(value); } return value.isEqual(multipliedShare) && _checkCorrectMultipliedShare(multipliedShare, secret); } return false; } function getBroadcastedData(bytes32 groupIndex, uint nodeIndex) external view returns (KeyShare[] memory, G2Operations.G2Point[] memory) { uint indexInSchain = SchainsInternal(contractManager.getContract("SchainsInternal")).getNodeIndexInGroup( groupIndex, nodeIndex ); if ( _data[groupIndex][indexInSchain].secretKeyContribution.length == 0 && _data[groupIndex][indexInSchain].verificationVector.length == 0 ) { KeyShare[] memory keyShare = new KeyShare[](0); G2Operations.G2Point[] memory g2Point = new G2Operations.G2Point[](0); return (keyShare, g2Point); } return ( _data[groupIndex][indexInSchain].secretKeyContribution, _data[groupIndex][indexInSchain].verificationVector ); } function getSecretKeyShare(bytes32 groupIndex, uint nodeIndex, uint index) external view returns (bytes32) { uint indexInSchain = SchainsInternal(contractManager.getContract("SchainsInternal")).getNodeIndexInGroup( groupIndex, nodeIndex ); return (_data[groupIndex][indexInSchain].secretKeyContribution[index].share); } function getVerificationVector(bytes32 groupIndex, uint nodeIndex) external view returns (G2Operations.G2Point[] memory) { uint indexInSchain = SchainsInternal(contractManager.getContract("SchainsInternal")).getNodeIndexInGroup( groupIndex, nodeIndex ); return (_data[groupIndex][indexInSchain].verificationVector); } function getCommonPublicKey(bytes32 groupIndex) external view returns (G2Operations.G2Point memory) { return _schainsPublicKeys[groupIndex]; } function getPreviousPublicKey(bytes32 groupIndex) external view returns (G2Operations.G2Point memory) { uint length = _previousSchainsPublicKeys[groupIndex].length; if (length == 0) { return G2Operations.getG2Zero(); } return _previousSchainsPublicKeys[groupIndex][length - 1]; } function getAllPreviousPublicKeys(bytes32 groupIndex) external view returns (G2Operations.G2Point[] memory) { return _previousSchainsPublicKeys[groupIndex]; } function getBLSPublicKey(bytes32 groupIndex, uint nodeIndex) external view returns (G2Operations.G2Point memory) { uint index = SchainsInternal(contractManager.getContract("SchainsInternal")).getNodeIndexInGroup( groupIndex, nodeIndex ); return _calculateBlsPublicKey(groupIndex, index); } function initialize(address contractsAddress) public override initializer { Permissions.initialize(contractsAddress); } function _calculateBlsPublicKey(bytes32 groupIndex, uint index) private view returns (G2Operations.G2Point memory) { G2Operations.G2Point memory publicKey = G2Operations.getG2Zero(); G2Operations.G2Point memory tmp = G2Operations.getG2Zero(); G2Operations.G2Point[] memory publicValues = _schainsNodesPublicKeys[groupIndex]; for (uint i = 0; i < publicValues.length; ++i) { require(publicValues[i].isG2(), "Incorrect g2 point publicValuesComponent"); tmp = publicValues[i].mulG2(Precompiled.bigModExp(index.add(1), i, Fp2Operations.P)); require(tmp.isG2(), "Incorrect g2 point tmp"); publicKey = tmp.addG2(publicKey); require(publicKey.isG2(), "Incorrect g2 point publicKey"); } return publicKey; } function _isSchainsPublicKeyZero(bytes32 schainId) private view returns (bool) { return _schainsPublicKeys[schainId].x.a == 0 && _schainsPublicKeys[schainId].x.b == 0 && _schainsPublicKeys[schainId].y.a == 0 && _schainsPublicKeys[schainId].y.b == 0; } function _getCommonPublicKey( uint256 secretNumber, uint fromNodeToComplaint ) private view returns (bytes32) { bytes32[2] memory publicKey = Nodes(contractManager.getContract("Nodes")).getNodePublicKey(fromNodeToComplaint); uint256 pkX = uint(publicKey[0]); (pkX, ) = ECDH(contractManager.getContract("ECDH")).deriveKey(secretNumber, pkX, uint(publicKey[1])); return bytes32(pkX); } function _decryptMessage( bytes32 groupIndex, uint secretNumber, uint nodeToComplaint, uint fromNodeToComplaint ) private view returns (uint) { bytes32 key = _getCommonPublicKey(secretNumber, fromNodeToComplaint); // Decrypt secret key contribution SchainsInternal schainsInternal = SchainsInternal(contractManager.getContract("SchainsInternal")); uint index = schainsInternal.getNodeIndexInGroup(groupIndex, fromNodeToComplaint); uint indexOfNode = schainsInternal.getNodeIndexInGroup(groupIndex, nodeToComplaint); uint secret = Decryption(contractManager.getContract("Decryption")).decrypt( _data[groupIndex][indexOfNode].secretKeyContribution[index].share, key ); return secret; } function _checkCorrectMultipliedShare(G2Operations.G2Point memory multipliedShare, uint secret) private view returns (bool) { G2Operations.G2Point memory tmp = multipliedShare; Fp2Operations.Fp2Point memory g1 = G2Operations.getG1(); Fp2Operations.Fp2Point memory share = Fp2Operations.Fp2Point({ a: 0, b: 0 }); (share.a, share.b) = Precompiled.bn256ScalarMul(g1.a, g1.b, secret); if (!(share.a == 0 && share.b == 0)) { share.b = Fp2Operations.P.sub((share.b % Fp2Operations.P)); } require(G2Operations.isG1(share), "mulShare not in G1"); G2Operations.G2Point memory g2 = G2Operations.getG2(); require(G2Operations.isG2(tmp), "tmp not in g2"); return Precompiled.bn256Pairing( share.a, share.b, g2.x.b, g2.x.a, g2.y.b, g2.y.a, g1.a, g1.b, tmp.x.b, tmp.x.a, tmp.y.b, tmp.y.a); } } contract Monitors is Permissions { using StringUtils for string; using SafeCast for uint; struct Verdict { uint toNodeIndex; uint32 downtime; uint32 latency; } struct CheckedNode { uint nodeIndex; uint time; } struct CheckedNodeWithIp { uint nodeIndex; uint time; bytes4 ip; } mapping (bytes32 => CheckedNode[]) public checkedNodes; mapping (bytes32 => uint[][]) public verdicts; mapping (bytes32 => uint[]) public groupsForMonitors; mapping (bytes32 => uint) public lastVerdictBlocks; mapping (bytes32 => uint) public lastBountyBlocks; event MonitorCreated( uint nodeIndex, bytes32 monitorIndex, uint numberOfMonitors, uint[] nodesInGroup, uint time, uint gasSpend ); event VerdictWasSent( uint indexed fromMonitorIndex, uint indexed toNodeIndex, uint32 downtime, uint32 latency, bool status, uint previousBlockEvent, uint time, uint gasSpend ); event MetricsWereCalculated( uint forNodeIndex, uint32 averageDowntime, uint32 averageLatency, uint time, uint gasSpend ); event PeriodsWereSet( uint rewardPeriod, uint deltaPeriod, uint time, uint gasSpend ); event MonitorRotated( bytes32 monitorIndex, uint newNode ); /** * addMonitor - setup monitors of node */ function addMonitor(uint nodeIndex) external allow("SkaleManager") { ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); bytes32 monitorIndex = keccak256(abi.encodePacked(nodeIndex)); _generateGroup(monitorIndex, nodeIndex, constantsHolder.NUMBER_OF_MONITORS()); CheckedNode memory checkedNode = _getCheckedNodeData(nodeIndex); for (uint i = 0; i < groupsForMonitors[monitorIndex].length; i++) { bytes32 index = keccak256(abi.encodePacked(groupsForMonitors[monitorIndex][i])); addCheckedNode(index, checkedNode); } emit MonitorCreated( nodeIndex, monitorIndex, groupsForMonitors[monitorIndex].length, groupsForMonitors[monitorIndex], block.timestamp, gasleft() ); } function deleteMonitor(uint nodeIndex) external allow("SkaleManager") { bytes32 monitorIndex = keccak256(abi.encodePacked(nodeIndex)); while (verdicts[keccak256(abi.encodePacked(nodeIndex))].length > 0) { verdicts[keccak256(abi.encodePacked(nodeIndex))].pop(); } uint[] memory nodesInGroup = groupsForMonitors[monitorIndex]; uint index; bytes32 monitoringIndex; for (uint i = 0; i < nodesInGroup.length; i++) { monitoringIndex = keccak256(abi.encodePacked(nodesInGroup[i])); (index, ) = _find(monitoringIndex, nodeIndex); if (index < checkedNodes[monitoringIndex].length) { if (index != checkedNodes[monitoringIndex].length.sub(1)) { checkedNodes[monitoringIndex][index] = checkedNodes[monitoringIndex][checkedNodes[monitoringIndex].length.sub(1)]; } checkedNodes[monitoringIndex].pop(); } } delete groupsForMonitors[monitorIndex]; } function removeCheckedNodes(uint nodeIndex) external allow("SkaleManager") { bytes32 monitorIndex = keccak256(abi.encodePacked(nodeIndex)); delete checkedNodes[monitorIndex]; } function sendVerdict(uint fromMonitorIndex, Verdict calldata verdict) external allow("SkaleManager") { uint index; uint time; bytes32 monitorIndex = keccak256(abi.encodePacked(fromMonitorIndex)); (index, time) = _find(monitorIndex, verdict.toNodeIndex); require(time > 0, "Checked Node does not exist in MonitorsArray"); if (time <= block.timestamp) { if (index != checkedNodes[monitorIndex].length.sub(1)) { checkedNodes[monitorIndex][index] = checkedNodes[monitorIndex][checkedNodes[monitorIndex].length.sub(1)]; } delete checkedNodes[monitorIndex][checkedNodes[monitorIndex].length.sub(1)]; checkedNodes[monitorIndex].pop(); ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); bool receiveVerdict = time.add(constantsHolder.deltaPeriod()) > block.timestamp; if (receiveVerdict) { verdicts[keccak256(abi.encodePacked(verdict.toNodeIndex))].push( [uint(verdict.downtime), uint(verdict.latency)] ); } _emitVerdictsEvent(fromMonitorIndex, verdict, receiveVerdict); } } function calculateMetrics(uint nodeIndex) external allow("SkaleManager") returns (uint averageDowntime, uint averageLatency) { bytes32 monitorIndex = keccak256(abi.encodePacked(nodeIndex)); uint lengthOfArray = getLengthOfMetrics(monitorIndex); uint[] memory downtimeArray = new uint[](lengthOfArray); uint[] memory latencyArray = new uint[](lengthOfArray); for (uint i = 0; i < lengthOfArray; i++) { downtimeArray[i] = verdicts[monitorIndex][i][0]; latencyArray[i] = verdicts[monitorIndex][i][1]; } if (lengthOfArray > 0) { averageDowntime = _median(downtimeArray); averageLatency = _median(latencyArray); } delete verdicts[monitorIndex]; } function setLastBountyBlock(uint nodeIndex) external allow("SkaleManager") { lastBountyBlocks[keccak256(abi.encodePacked(nodeIndex))] = block.number; } function getCheckedArray(bytes32 monitorIndex) external view returns (CheckedNodeWithIp[] memory checkedNodesWithIp) { Nodes nodes = Nodes(contractManager.getContract("Nodes")); checkedNodesWithIp = new CheckedNodeWithIp[](checkedNodes[monitorIndex].length); for (uint i = 0; i < checkedNodes[monitorIndex].length; ++i) { checkedNodesWithIp[i].nodeIndex = checkedNodes[monitorIndex][i].nodeIndex; checkedNodesWithIp[i].time = checkedNodes[monitorIndex][i].time; checkedNodesWithIp[i].ip = nodes.getNodeIP(checkedNodes[monitorIndex][i].nodeIndex); } } function getLastBountyBlock(uint nodeIndex) external view returns (uint) { return lastBountyBlocks[keccak256(abi.encodePacked(nodeIndex))]; } function getNodesInGroup(bytes32 monitorIndex) external view returns (uint[] memory) { return groupsForMonitors[monitorIndex]; } function getNumberOfNodesInGroup(bytes32 monitorIndex) external view returns (uint) { return groupsForMonitors[monitorIndex].length; } function initialize(address newContractsAddress) public override initializer { Permissions.initialize(newContractsAddress); } /** * Add checked node or update existing one if it is already exits */ function addCheckedNode(bytes32 monitorIndex, CheckedNode memory checkedNode) public allow("SkaleManager") { for (uint i = 0; i < checkedNodes[monitorIndex].length; ++i) { if (checkedNodes[monitorIndex][i].nodeIndex == checkedNode.nodeIndex) { checkedNodes[monitorIndex][i] = checkedNode; return; } } checkedNodes[monitorIndex].push(checkedNode); } function getLastReceivedVerdictBlock(uint nodeIndex) public view returns (uint) { return lastVerdictBlocks[keccak256(abi.encodePacked(nodeIndex))]; } function getLengthOfMetrics(bytes32 monitorIndex) public view returns (uint) { return verdicts[monitorIndex].length; } function _generateGroup(bytes32 monitorIndex, uint nodeIndex, uint numberOfNodes) private { Nodes nodes = Nodes(contractManager.getContract("Nodes")); uint[] memory activeNodes = nodes.getActiveNodeIds(); uint numberOfNodesInGroup; uint availableAmount = activeNodes.length.sub((nodes.isNodeActive(nodeIndex)) ? 1 : 0); if (numberOfNodes > availableAmount) { numberOfNodesInGroup = availableAmount; } else { numberOfNodesInGroup = numberOfNodes; } uint ignoringTail = 0; uint random = uint(keccak256(abi.encodePacked(uint(blockhash(block.number.sub(1))), monitorIndex))); for (uint i = 0; i < numberOfNodesInGroup; ++i) { uint index = random % (activeNodes.length.sub(ignoringTail)); if (activeNodes[index] == nodeIndex) { _swap(activeNodes, index, activeNodes.length.sub(ignoringTail).sub(1)); ++ignoringTail; index = random % (activeNodes.length.sub(ignoringTail)); } groupsForMonitors[monitorIndex].push(activeNodes[index]); _swap(activeNodes, index, activeNodes.length.sub(ignoringTail).sub(1)); ++ignoringTail; } } function _median(uint[] memory values) private pure returns (uint) { if (values.length < 1) { revert("Can't calculate _median of empty array"); } _quickSort(values, 0, values.length.sub(1)); return values[values.length.div(2)]; } function _swap(uint[] memory array, uint index1, uint index2) private pure { uint buffer = array[index1]; array[index1] = array[index2]; array[index2] = buffer; } function _find(bytes32 monitorIndex, uint nodeIndex) private view returns (uint index, uint time) { index = checkedNodes[monitorIndex].length; time = 0; for (uint i = 0; i < checkedNodes[monitorIndex].length; i++) { uint checkedNodeNodeIndex; uint checkedNodeTime; checkedNodeNodeIndex = checkedNodes[monitorIndex][i].nodeIndex; checkedNodeTime = checkedNodes[monitorIndex][i].time; if (checkedNodeNodeIndex == nodeIndex && (time == 0 || checkedNodeTime < time)) { index = i; time = checkedNodeTime; } } } function _quickSort(uint[] memory array, uint left, uint right) private pure { uint leftIndex = left; uint rightIndex = right; uint middle = array[right.add(left).div(2)]; while (leftIndex <= rightIndex) { while (array[leftIndex] < middle) { leftIndex++; } while (middle < array[rightIndex]) { rightIndex--; } if (leftIndex <= rightIndex) { (array[leftIndex], array[rightIndex]) = (array[rightIndex], array[leftIndex]); leftIndex++; rightIndex = (rightIndex > 0 ? rightIndex.sub(1) : 0); } } if (left < rightIndex) _quickSort(array, left, rightIndex); if (leftIndex < right) _quickSort(array, leftIndex, right); } function _getCheckedNodeData(uint nodeIndex) private view returns (CheckedNode memory checkedNode) { ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); Nodes nodes = Nodes(contractManager.getContract("Nodes")); checkedNode.nodeIndex = nodeIndex; checkedNode.time = nodes.getNodeNextRewardDate(nodeIndex).sub(constantsHolder.deltaPeriod()); } function _emitVerdictsEvent( uint fromMonitorIndex, Verdict memory verdict, bool receiveVerdict ) private { uint previousBlockEvent = getLastReceivedVerdictBlock(verdict.toNodeIndex); lastVerdictBlocks[keccak256(abi.encodePacked(verdict.toNodeIndex))] = block.number; emit VerdictWasSent( fromMonitorIndex, verdict.toNodeIndex, verdict.downtime, verdict.latency, receiveVerdict, previousBlockEvent, block.timestamp, gasleft() ); } } contract NodeRotation is Permissions { using StringUtils for string; using StringUtils for uint; /** * nodeIndex - index of Node which is in process of rotation(left from schain) * newNodeIndex - index of Node which is rotated(added to schain) * freezeUntil - time till which Node should be turned on * rotationCounter - how many rotations were on this schain */ struct Rotation { uint nodeIndex; uint newNodeIndex; uint freezeUntil; uint rotationCounter; } struct LeavingHistory { bytes32 schainIndex; uint finishedRotation; } mapping (bytes32 => Rotation) public rotations; mapping (uint => LeavingHistory[]) public leavingHistory; function exitFromSchain(uint nodeIndex) external allow("SkaleManager") returns (bool) { SchainsInternal schainsInternal = SchainsInternal(contractManager.getContract("SchainsInternal")); bytes32 schainId = schainsInternal.getActiveSchain(nodeIndex); require(_checkRotation(schainId), "No any free Nodes for rotating"); rotateNode(nodeIndex, schainId, true); return schainsInternal.getActiveSchain(nodeIndex) == bytes32(0) ? true : false; } function freezeSchains(uint nodeIndex) external allow("SkaleManager") { SchainsInternal schainsInternal = SchainsInternal(contractManager.getContract("SchainsInternal")); bytes32[] memory schains = schainsInternal.getActiveSchains(nodeIndex); for (uint i = 0; i < schains.length; i++) { Rotation memory rotation = rotations[schains[i]]; if (rotation.nodeIndex == nodeIndex && now < rotation.freezeUntil) { continue; } string memory schainName = schainsInternal.getSchainName(schains[i]); string memory revertMessage = "Node cannot rotate on Schain "; revertMessage = revertMessage.strConcat(schainName); revertMessage = revertMessage.strConcat(", occupied by Node "); revertMessage = revertMessage.strConcat(rotation.nodeIndex.uint2str()); string memory dkgRevert = "DKG proccess did not finish on schain "; ISkaleDKG skaleDKG = ISkaleDKG(contractManager.getContract("SkaleDKG")); require( skaleDKG.isLastDKGSuccesful(keccak256(abi.encodePacked(schainName))), dkgRevert.strConcat(schainName)); require(rotation.freezeUntil < now, revertMessage); _startRotation(schains[i], nodeIndex); } } function removeRotation(bytes32 schainIndex) external allow("Schains") { delete rotations[schainIndex]; } function skipRotationDelay(bytes32 schainIndex) external onlyOwner { rotations[schainIndex].freezeUntil = now; } function getRotation(bytes32 schainIndex) external view returns (Rotation memory) { if (rotations[schainIndex].nodeIndex != rotations[schainIndex].newNodeIndex) { return rotations[schainIndex]; } return Rotation(0, 0, 0, 0); } function getLeavingHistory(uint nodeIndex) external view returns (LeavingHistory[] memory) { return leavingHistory[nodeIndex]; } function initialize(address newContractsAddress) public override initializer { Permissions.initialize(newContractsAddress); } function rotateNode( uint nodeIndex, bytes32 schainId, bool shouldDelay ) public allowTwo("SkaleDKG", "SkaleManager") returns (uint newNode) { SchainsInternal schainsInternal = SchainsInternal(contractManager.getContract("SchainsInternal")); schainsInternal.removeNodeFromSchain(nodeIndex, schainId); newNode = selectNodeToGroup(schainId); _finishRotation(schainId, nodeIndex, newNode, shouldDelay); } /** * @dev selectNodeToGroup - pseudo-randomly select new Node for Schain * @param schainId - hash of name of Schain * @return nodeIndex - global index of Node */ function selectNodeToGroup(bytes32 schainId) public allowThree("SkaleManager", "Schains", "SkaleDKG") returns (uint) { SchainsInternal schainsInternal = SchainsInternal(contractManager.getContract("SchainsInternal")); Nodes nodes = Nodes(contractManager.getContract("Nodes")); require(schainsInternal.isSchainActive(schainId), "Group is not active"); uint8 space = schainsInternal.getSchainsPartOfNode(schainId); uint[] memory possibleNodes = schainsInternal.isEnoughNodes(schainId); require(possibleNodes.length > 0, "No any free Nodes for rotation"); uint nodeIndex; uint random = uint(keccak256(abi.encodePacked(uint(blockhash(block.number - 1)), schainId))); do { uint index = random % possibleNodes.length; nodeIndex = possibleNodes[index]; random = uint(keccak256(abi.encodePacked(random, nodeIndex))); } while (schainsInternal.checkException(schainId, nodeIndex)); require(nodes.removeSpaceFromNode(nodeIndex, space), "Could not remove space from nodeIndex"); schainsInternal.addSchainForNode(nodeIndex, schainId); schainsInternal.setException(schainId, nodeIndex); schainsInternal.setNodeInGroup(schainId, nodeIndex); return nodeIndex; } function _startRotation(bytes32 schainIndex, uint nodeIndex) private { ConstantsHolder constants = ConstantsHolder(contractManager.getContract("ConstantsHolder")); rotations[schainIndex].nodeIndex = nodeIndex; rotations[schainIndex].newNodeIndex = nodeIndex; rotations[schainIndex].freezeUntil = now.add(constants.rotationDelay()); } function _finishRotation( bytes32 schainIndex, uint nodeIndex, uint newNodeIndex, bool shouldDelay) private { ConstantsHolder constants = ConstantsHolder(contractManager.getContract("ConstantsHolder")); leavingHistory[nodeIndex].push( LeavingHistory(schainIndex, shouldDelay ? now.add(constants.rotationDelay()) : now) ); rotations[schainIndex].newNodeIndex = newNodeIndex; rotations[schainIndex].rotationCounter++; ISkaleDKG(contractManager.getContract("SkaleDKG")).openChannel(schainIndex); } function _checkRotation(bytes32 schainId ) private view returns (bool) { SchainsInternal schainsInternal = SchainsInternal(contractManager.getContract("SchainsInternal")); require(schainsInternal.isSchainExist(schainId), "Schain does not exist for rotation"); return schainsInternal.isAnyFreeNode(schainId); } } contract Nodes is Permissions { using SafeCast for uint; // All Nodes states enum NodeStatus {Active, Leaving, Left, In_Maintenance} struct Node { string name; bytes4 ip; bytes4 publicIP; uint16 port; bytes32[2] publicKey; uint startBlock; uint lastRewardDate; uint finishTime; NodeStatus status; uint validatorId; } // struct to note which Nodes and which number of Nodes owned by user struct CreatedNodes { mapping (uint => bool) isNodeExist; uint numberOfNodes; } struct SpaceManaging { uint8 freeSpace; uint indexInSpaceMap; } // TODO: move outside the contract struct NodeCreationParams { string name; bytes4 ip; bytes4 publicIp; uint16 port; bytes32[2] publicKey; uint16 nonce; } // array which contain all Nodes Node[] public nodes; SpaceManaging[] public spaceOfNodes; // mapping for checking which Nodes and which number of Nodes owned by user mapping (address => CreatedNodes) public nodeIndexes; // mapping for checking is IP address busy mapping (bytes4 => bool) public nodesIPCheck; // mapping for checking is Name busy mapping (bytes32 => bool) public nodesNameCheck; // mapping for indication from Name to Index mapping (bytes32 => uint) public nodesNameToIndex; // mapping for indication from space to Nodes mapping (uint8 => uint[]) public spaceToNodes; mapping (uint => uint[]) public validatorToNodeIndexes; uint public numberOfActiveNodes; uint public numberOfLeavingNodes; uint public numberOfLeftNodes; // informs that Node is created event NodeCreated( uint nodeIndex, address owner, string name, bytes4 ip, bytes4 publicIP, uint16 port, uint16 nonce, uint time, uint gasSpend ); // informs that node is fully finished quitting from the system event ExitCompleted( uint nodeIndex, uint time, uint gasSpend ); // informs that owner starts the procedure of quitting the Node from the system event ExitInited( uint nodeIndex, uint startLeavingPeriod, uint time, uint gasSpend ); modifier checkNodeExists(uint nodeIndex) { require(nodeIndex < nodes.length, "Node with such index does not exist"); _; } /** * @dev removeSpaceFromFractionalNode - occupies space from Fractional Node * function could be run only by Schains * @param nodeIndex - index of Node at array of Fractional Nodes * @param space - space which should be occupied */ function removeSpaceFromNode(uint nodeIndex, uint8 space) external checkNodeExists(nodeIndex) allowTwo("NodeRotation", "SchainsInternal") returns (bool) { if (spaceOfNodes[nodeIndex].freeSpace < space) { return false; } if (space > 0) { _moveNodeToNewSpaceMap( nodeIndex, uint(spaceOfNodes[nodeIndex].freeSpace).sub(space).toUint8() ); } return true; } /** * @dev adSpaceToFractionalNode - returns space to Fractional Node * function could be run only be Schains * @param nodeIndex - index of Node at array of Fractional Nodes * @param space - space which should be returned */ function addSpaceToNode(uint nodeIndex, uint8 space) external checkNodeExists(nodeIndex) allow("Schains") { if (space > 0) { _moveNodeToNewSpaceMap( nodeIndex, uint(spaceOfNodes[nodeIndex].freeSpace).add(space).toUint8() ); } } /** * @dev changeNodeLastRewardDate - changes Node's last reward date * function could be run only by SkaleManager * @param nodeIndex - index of Node */ function changeNodeLastRewardDate(uint nodeIndex) external checkNodeExists(nodeIndex) allow("SkaleManager") { nodes[nodeIndex].lastRewardDate = block.timestamp; } function changeNodeFinishTime(uint nodeIndex, uint time) external checkNodeExists(nodeIndex) allow("SkaleManager") { nodes[nodeIndex].finishTime = time; } /** * @dev createNode - creates new Node and add it to the Nodes contract * function could be only run by SkaleManager * @param from - owner of Node */ // * @return nodeIndex - index of Node function createNode(address from, NodeCreationParams calldata params) external allow("SkaleManager") // returns (uint nodeIndex) { // checks that Node has correct data require(params.ip != 0x0 && !nodesIPCheck[params.ip], "IP address is zero or is not available"); require(!nodesNameCheck[keccak256(abi.encodePacked(params.name))], "Name has already registered"); require(params.port > 0, "Port is zero"); uint validatorId = ValidatorService( contractManager.getContract("ValidatorService")).getValidatorIdByNodeAddress(from); // adds Node to Nodes contract uint nodeIndex = _addNode( from, params.name, params.ip, params.publicIp, params.port, params.publicKey, validatorId); emit NodeCreated( nodeIndex, from, params.name, params.ip, params.publicIp, params.port, params.nonce, block.timestamp, gasleft()); } /** * @dev initExit - initiate a procedure of quitting the system * function could be only run by SkaleManager * @param nodeIndex - index of Node * @return true - if everything OK */ function initExit(uint nodeIndex) external checkNodeExists(nodeIndex) allow("SkaleManager") returns (bool) { _setNodeLeaving(nodeIndex); emit ExitInited( nodeIndex, block.timestamp, block.timestamp, gasleft()); return true; } /** * @dev completeExit - finish a procedure of quitting the system * function could be run only by SkaleManager * @param nodeIndex - index of Node * @return amount of SKL which be returned */ function completeExit(uint nodeIndex) external checkNodeExists(nodeIndex) allow("SkaleManager") returns (bool) { require(isNodeLeaving(nodeIndex), "Node is not Leaving"); _setNodeLeft(nodeIndex); _deleteNode(nodeIndex); emit ExitCompleted( nodeIndex, block.timestamp, gasleft()); return true; } function deleteNodeForValidator(uint validatorId, uint nodeIndex) external checkNodeExists(nodeIndex) allow("SkaleManager") { ValidatorService validatorService = ValidatorService(contractManager.getContract("ValidatorService")); require(validatorService.validatorExists(validatorId), "Validator with such ID does not exist"); uint[] memory validatorNodes = validatorToNodeIndexes[validatorId]; uint position = _findNode(validatorNodes, nodeIndex); if (position < validatorNodes.length) { validatorToNodeIndexes[validatorId][position] = validatorToNodeIndexes[validatorId][validatorNodes.length.sub(1)]; } validatorToNodeIndexes[validatorId].pop(); } function checkPossibilityCreatingNode(address nodeAddress) external allow("SkaleManager") { ValidatorService validatorService = ValidatorService(contractManager.getContract("ValidatorService")); DelegationController delegationController = DelegationController( contractManager.getContract("DelegationController") ); uint validatorId = validatorService.getValidatorIdByNodeAddress(nodeAddress); require(validatorService.isAuthorizedValidator(validatorId), "Validator is not authorized to create a node"); uint[] memory validatorNodes = validatorToNodeIndexes[validatorId]; uint delegationsTotal = delegationController.getAndUpdateDelegatedToValidatorNow(validatorId); uint msr = ConstantsHolder(contractManager.getContract("ConstantsHolder")).msr(); require( validatorNodes.length.add(1).mul(msr) <= delegationsTotal, "Validator must meet the Minimum Staking Requirement"); } function checkPossibilityToMaintainNode( uint validatorId, uint nodeIndex ) external checkNodeExists(nodeIndex) allow("Bounty") returns (bool) { DelegationController delegationController = DelegationController( contractManager.getContract("DelegationController") ); ValidatorService validatorService = ValidatorService(contractManager.getContract("ValidatorService")); require(validatorService.validatorExists(validatorId), "Validator with such ID does not exist"); uint[] memory validatorNodes = validatorToNodeIndexes[validatorId]; uint position = _findNode(validatorNodes, nodeIndex); require(position < validatorNodes.length, "Node does not exist for this Validator"); uint delegationsTotal = delegationController.getAndUpdateDelegatedToValidatorNow(validatorId); uint msr = ConstantsHolder(contractManager.getContract("ConstantsHolder")).msr(); return position.add(1).mul(msr) <= delegationsTotal; } function setNodeInMaintenance(uint nodeIndex) external { require(nodes[nodeIndex].status == NodeStatus.Active, "Node is not Active"); ValidatorService validatorService = ValidatorService(contractManager.getContract("ValidatorService")); uint validatorId = getValidatorId(nodeIndex); bool permitted = (_isOwner() || isNodeExist(msg.sender, nodeIndex)); if (!permitted) { permitted = validatorService.getValidatorId(msg.sender) == validatorId; } require(permitted, "Sender is not permitted to call this function"); nodes[nodeIndex].status = NodeStatus.In_Maintenance; } function removeNodeFromInMaintenance(uint nodeIndex) external { require(nodes[nodeIndex].status == NodeStatus.In_Maintenance, "Node is not In Maintence"); ValidatorService validatorService = ValidatorService(contractManager.getContract("ValidatorService")); uint validatorId = getValidatorId(nodeIndex); bool permitted = (_isOwner() || isNodeExist(msg.sender, nodeIndex)); if (!permitted) { permitted = validatorService.getValidatorId(msg.sender) == validatorId; } require(permitted, "Sender is not permitted to call this function"); nodes[nodeIndex].status = NodeStatus.Active; } function getNodesWithFreeSpace(uint8 freeSpace) external view returns (uint[] memory) { ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); uint[] memory nodesWithFreeSpace = new uint[](countNodesWithFreeSpace(freeSpace)); uint cursor = 0; uint totalSpace = constantsHolder.TOTAL_SPACE_ON_NODE(); for (uint8 i = freeSpace; i <= totalSpace; ++i) { for (uint j = 0; j < spaceToNodes[i].length; j++) { nodesWithFreeSpace[cursor] = spaceToNodes[i][j]; ++cursor; } } return nodesWithFreeSpace; } /** * @dev isTimeForReward - checks if time for reward has come * @param nodeIndex - index of Node * @return if time for reward has come - true, else - false */ function isTimeForReward(uint nodeIndex) external view checkNodeExists(nodeIndex) returns (bool) { ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); return uint(nodes[nodeIndex].lastRewardDate).add(constantsHolder.rewardPeriod()) <= block.timestamp; } /** * @dev getNodeIP - get ip address of Node * @param nodeIndex - index of Node * @return ip address */ function getNodeIP(uint nodeIndex) external view checkNodeExists(nodeIndex) returns (bytes4) { require(nodeIndex < nodes.length, "Node does not exist"); return nodes[nodeIndex].ip; } /** * @dev getNodePort - get Node's port * @param nodeIndex - index of Node * @return port */ function getNodePort(uint nodeIndex) external view checkNodeExists(nodeIndex) returns (uint16) { return nodes[nodeIndex].port; } function getNodePublicKey(uint nodeIndex) external view checkNodeExists(nodeIndex) returns (bytes32[2] memory) { return nodes[nodeIndex].publicKey; } function getNodeFinishTime(uint nodeIndex) external view checkNodeExists(nodeIndex) returns (uint) { return nodes[nodeIndex].finishTime; } /** * @dev isNodeLeft - checks if Node status Left * @param nodeIndex - index of Node * @return if Node status Left - true, else - false */ function isNodeLeft(uint nodeIndex) external view checkNodeExists(nodeIndex) returns (bool) { return nodes[nodeIndex].status == NodeStatus.Left; } function isNodeInMaintenance(uint nodeIndex) external view checkNodeExists(nodeIndex) returns (bool) { return nodes[nodeIndex].status == NodeStatus.In_Maintenance; } /** * @dev getNodeLastRewardDate - get Node last reward date * @param nodeIndex - index of Node * @return Node last reward date */ function getNodeLastRewardDate(uint nodeIndex) external view checkNodeExists(nodeIndex) returns (uint) { return nodes[nodeIndex].lastRewardDate; } /** * @dev getNodeNextRewardDate - get Node next reward date * @param nodeIndex - index of Node * @return Node next reward date */ function getNodeNextRewardDate(uint nodeIndex) external view checkNodeExists(nodeIndex) returns (uint) { ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); return nodes[nodeIndex].lastRewardDate.add(constantsHolder.rewardPeriod()); } /** * @dev getNumberOfNodes - get number of Nodes * @return number of Nodes */ function getNumberOfNodes() external view returns (uint) { return nodes.length; } /** * @dev getNumberOfFullNodes - get number Online Nodes * @return number of active nodes plus number of leaving nodes */ function getNumberOnlineNodes() external view returns (uint) { return numberOfActiveNodes.add(numberOfLeavingNodes); } /** * @dev getActiveNodeIPs - get array of ips of Active Nodes * @return activeNodeIPs - array of ips of Active Nodes */ function getActiveNodeIPs() external view returns (bytes4[] memory activeNodeIPs) { activeNodeIPs = new bytes4[](numberOfActiveNodes); uint indexOfActiveNodeIPs = 0; for (uint indexOfNodes = 0; indexOfNodes < nodes.length; indexOfNodes++) { if (isNodeActive(indexOfNodes)) { activeNodeIPs[indexOfActiveNodeIPs] = nodes[indexOfNodes].ip; indexOfActiveNodeIPs++; } } } /** * @dev getActiveNodesByAddress - get array of indexes of Active Nodes, which were * created by msg.sender * @return activeNodesByAddress Array of indexes of Active Nodes, which were created by msg.sender */ function getActiveNodesByAddress() external view returns (uint[] memory activeNodesByAddress) { activeNodesByAddress = new uint[](nodeIndexes[msg.sender].numberOfNodes); uint indexOfActiveNodesByAddress = 0; for (uint indexOfNodes = 0; indexOfNodes < nodes.length; indexOfNodes++) { if (nodeIndexes[msg.sender].isNodeExist[indexOfNodes] && isNodeActive(indexOfNodes)) { activeNodesByAddress[indexOfActiveNodesByAddress] = indexOfNodes; indexOfActiveNodesByAddress++; } } } /** * @dev getActiveNodeIds - get array of indexes of Active Nodes * @return activeNodeIds - array of indexes of Active Nodes */ function getActiveNodeIds() external view returns (uint[] memory activeNodeIds) { activeNodeIds = new uint[](numberOfActiveNodes); uint indexOfActiveNodeIds = 0; for (uint indexOfNodes = 0; indexOfNodes < nodes.length; indexOfNodes++) { if (isNodeActive(indexOfNodes)) { activeNodeIds[indexOfActiveNodeIds] = indexOfNodes; indexOfActiveNodeIds++; } } } function getNodeStatus(uint nodeIndex) external view checkNodeExists(nodeIndex) returns (NodeStatus) { return nodes[nodeIndex].status; } function getValidatorNodeIndexes(uint validatorId) external view returns (uint[] memory) { ValidatorService validatorService = ValidatorService(contractManager.getContract("ValidatorService")); require(validatorService.validatorExists(validatorId), "Validator with such ID does not exist"); return validatorToNodeIndexes[validatorId]; } /** * @dev constructor in Permissions approach * @param contractsAddress needed in Permissions constructor */ function initialize(address contractsAddress) public override initializer { Permissions.initialize(contractsAddress); numberOfActiveNodes = 0; numberOfLeavingNodes = 0; numberOfLeftNodes = 0; } function getValidatorId(uint nodeIndex) public view checkNodeExists(nodeIndex) returns (uint) { return nodes[nodeIndex].validatorId; } /** * @dev isNodeExist - checks existence of Node at this address * @param from - account address * @param nodeIndex - index of Node * @return if exist - true, else - false */ function isNodeExist(address from, uint nodeIndex) public view checkNodeExists(nodeIndex) returns (bool) { return nodeIndexes[from].isNodeExist[nodeIndex]; } /** * @dev isNodeActive - checks if Node status Active * @param nodeIndex - index of Node * @return if Node status Active - true, else - false */ function isNodeActive(uint nodeIndex) public view checkNodeExists(nodeIndex) returns (bool) { return nodes[nodeIndex].status == NodeStatus.Active; } /** * @dev isNodeLeaving - checks if Node status Leaving * @param nodeIndex - index of Node * @return if Node status Leaving - true, else - false */ function isNodeLeaving(uint nodeIndex) public view checkNodeExists(nodeIndex) returns (bool) { return nodes[nodeIndex].status == NodeStatus.Leaving; } function countNodesWithFreeSpace(uint8 freeSpace) public view returns (uint count) { ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); count = 0; uint totalSpace = constantsHolder.TOTAL_SPACE_ON_NODE(); for (uint8 i = freeSpace; i <= totalSpace; ++i) { count = count.add(spaceToNodes[i].length); } } function _findNode(uint[] memory validatorNodeIndexes, uint nodeIndex) private pure returns (uint) { uint i; for (i = 0; i < validatorNodeIndexes.length; i++) { if (validatorNodeIndexes[i] == nodeIndex) { return i; } } return validatorNodeIndexes.length; } function _moveNodeToNewSpaceMap(uint nodeIndex, uint8 newSpace) private { uint8 previousSpace = spaceOfNodes[nodeIndex].freeSpace; uint indexInArray = spaceOfNodes[nodeIndex].indexInSpaceMap; if (indexInArray < spaceToNodes[previousSpace].length.sub(1)) { uint shiftedIndex = spaceToNodes[previousSpace][spaceToNodes[previousSpace].length.sub(1)]; spaceToNodes[previousSpace][indexInArray] = shiftedIndex; spaceOfNodes[shiftedIndex].indexInSpaceMap = indexInArray; spaceToNodes[previousSpace].pop(); } else { spaceToNodes[previousSpace].pop(); } spaceToNodes[newSpace].push(nodeIndex); spaceOfNodes[nodeIndex].freeSpace = newSpace; spaceOfNodes[nodeIndex].indexInSpaceMap = spaceToNodes[newSpace].length.sub(1); } /** * @dev _setNodeLeft - set Node Left * function could be run only by Nodes * @param nodeIndex - index of Node */ function _setNodeLeft(uint nodeIndex) private { nodesIPCheck[nodes[nodeIndex].ip] = false; nodesNameCheck[keccak256(abi.encodePacked(nodes[nodeIndex].name))] = false; delete nodesNameToIndex[keccak256(abi.encodePacked(nodes[nodeIndex].name))]; if (nodes[nodeIndex].status == NodeStatus.Active) { numberOfActiveNodes--; } else { numberOfLeavingNodes--; } nodes[nodeIndex].status = NodeStatus.Left; numberOfLeftNodes++; } /** * @dev _setNodeLeaving - set Node Leaving * function could be run only by Nodes * @param nodeIndex - index of Node */ function _setNodeLeaving(uint nodeIndex) private { nodes[nodeIndex].status = NodeStatus.Leaving; numberOfActiveNodes--; numberOfLeavingNodes++; } /** * @dev _addNode - adds Node to array * function could be run only by executor * @param from - owner of Node * @param name - Node name * @param ip - Node ip * @param publicIP - Node public ip * @param port - Node public port * @param publicKey - Ethereum public key * @return nodeIndex Index of Node */ function _addNode( address from, string memory name, bytes4 ip, bytes4 publicIP, uint16 port, bytes32[2] memory publicKey, uint validatorId ) private returns (uint nodeIndex) { ConstantsHolder constantsHolder = ConstantsHolder(contractManager.getContract("ConstantsHolder")); nodes.push(Node({ name: name, ip: ip, publicIP: publicIP, port: port, //owner: from, publicKey: publicKey, startBlock: block.number, lastRewardDate: block.timestamp, finishTime: 0, status: NodeStatus.Active, validatorId: validatorId })); nodeIndex = nodes.length.sub(1); validatorToNodeIndexes[validatorId].push(nodeIndex); bytes32 nodeId = keccak256(abi.encodePacked(name)); nodesIPCheck[ip] = true; nodesNameCheck[nodeId] = true; nodesNameToIndex[nodeId] = nodeIndex; nodeIndexes[from].isNodeExist[nodeIndex] = true; nodeIndexes[from].numberOfNodes++; spaceOfNodes.push(SpaceManaging({ freeSpace: constantsHolder.TOTAL_SPACE_ON_NODE(), indexInSpaceMap: spaceToNodes[constantsHolder.TOTAL_SPACE_ON_NODE()].length })); spaceToNodes[constantsHolder.TOTAL_SPACE_ON_NODE()].push(nodeIndex); numberOfActiveNodes++; } function _deleteNode(uint nodeIndex) private { uint8 space = spaceOfNodes[nodeIndex].freeSpace; uint indexInArray = spaceOfNodes[nodeIndex].indexInSpaceMap; if (indexInArray < spaceToNodes[space].length.sub(1)) { uint shiftedIndex = spaceToNodes[space][spaceToNodes[space].length.sub(1)]; spaceToNodes[space][indexInArray] = shiftedIndex; spaceOfNodes[shiftedIndex].indexInSpaceMap = indexInArray; spaceToNodes[space].pop(); } else { spaceToNodes[space].pop(); } delete spaceOfNodes[nodeIndex].freeSpace; delete spaceOfNodes[nodeIndex].indexInSpaceMap; } }

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{"success": true, "error": null, "results": {"detectors": [{"check": "divide-before-multiply", "impact": "Medium", "confidence": "Medium"}, {"check": "reentrancy-no-eth", "impact": "Medium", "confidence": "Medium"}, {"check": "incorrect-equality", "impact": "Medium", "confidence": "High"}, {"check": "write-after-write", "impact": "Medium", "confidence": "High"}, {"check": "weak-prng", "impact": "High", "confidence": "Medium"}]}}

0x8a17275820e6f026cb5fffc9bba7658d82ddef2e

pragma solidity 0.6.12; pragma experimental ABIEncoderV2; interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } interface sbCommunityInterface { function getTokenData(address token, uint256 day) external view returns ( uint256, uint256, uint256 ); function receiveRewards(uint256 day, uint256 amount) external; function serviceAccepted(address service) external view returns (bool); function getMinerRewardPercentage() external view returns (uint256); } contract sbControllerV3 { event CommunityAdded(address indexed community); event RewardsReleased( address indexed receiver, uint256 amount, uint256 indexed day ); using SafeMath for uint256; bool internal initDone; address internal sbTimelock; IERC20 internal strongToken; sbTokensInterface internal sbTokens; sbStrongPoolInterface internal sbStrongPool; sbVotesInterface internal sbVotes; uint256 internal startDay; mapping(uint256 => uint256) internal COMMUNITY_DAILY_REWARDS_BY_YEAR; mapping(uint256 => uint256) internal STRONGPOOL_DAILY_REWARDS_BY_YEAR; mapping(uint256 => uint256) internal VOTER_DAILY_REWARDS_BY_YEAR; uint256 internal MAX_YEARS; address[] internal communities; mapping(uint256 => uint256) internal dayMineSecondsUSDTotal; mapping(address => mapping(uint256 => uint256)) internal communityDayMineSecondsUSD; mapping(address => mapping(uint256 => uint256)) internal communityDayRewards; mapping(address => uint256) internal communityDayStart; uint256 internal dayLastReleasedRewardsFor; address internal superAdmin; address internal pendingSuperAdmin; function removeTokens(address account, uint256 amount) public { require(msg.sender == superAdmin, "not superAdmin"); strongToken.transfer(account, amount); } function setPendingSuperAdmin(address newPendingSuperAdmin) public { require( msg.sender == superAdmin && msg.sender != address(0), "not superAdmin" ); pendingSuperAdmin = newPendingSuperAdmin; } function acceptSuperAdmin() public { require( msg.sender == pendingSuperAdmin && msg.sender != address(0), "not pendingSuperAdmin" ); superAdmin = pendingSuperAdmin; pendingSuperAdmin = address(0); } function getSuperAdminAddressUsed() public view returns (address) { return superAdmin; } function getPendingSuperAdminAddressUsed() public view returns (address) { return pendingSuperAdmin; } function updateCommunityDailyRewardsByYear(uint256 amount) public { require( msg.sender == superAdmin && msg.sender != address(0), "not superAdmin" ); uint256 year = _getYearDayIsIn(_getCurrentDay()); require(year <= MAX_YEARS, "invalid year"); COMMUNITY_DAILY_REWARDS_BY_YEAR[year] = amount; } function updateStrongPoolDailyRewardsByYear(uint256 amount) public { require( msg.sender == superAdmin && msg.sender != address(0), "not superAdmin" ); uint256 year = _getYearDayIsIn(_getCurrentDay()); require(year <= MAX_YEARS, "invalid year"); STRONGPOOL_DAILY_REWARDS_BY_YEAR[year] = amount; } function updateVoterDailyRewardsByYear(uint256 amount) public { require( msg.sender == superAdmin && msg.sender != address(0), "not superAdmin" ); uint256 year = _getYearDayIsIn(_getCurrentDay()); require(year <= MAX_YEARS, "invalid year"); VOTER_DAILY_REWARDS_BY_YEAR[year] = amount; } function upToDate() external pure returns (bool) { return true; // return dayLastReleasedRewardsFor == _getCurrentDay().sub(1); } function addCommunity(address community) external { require(msg.sender == sbTimelock, "not sbTimelock"); require(community != address(0), "community not zero address"); require(!_communityExists(community), "community exists"); communities.push(community); communityDayStart[community] = _getCurrentDay(); emit CommunityAdded(community); } function getCommunities() external view returns (address[] memory) { return communities; } function getDayMineSecondsUSDTotal(uint256 day) external view returns (uint256) { // require(day >= startDay, '1: invalid day'); // require(day <= dayLastReleasedRewardsFor, '2: invalid day'); return dayMineSecondsUSDTotal[day]; } function getCommunityDayMineSecondsUSD(address community, uint256 day) external view returns (uint256) { require(_communityExists(community), "invalid community"); // require(day >= communityDayStart[community], '1: invalid day'); // require(day <= dayLastReleasedRewardsFor, '2: invalid day'); return communityDayMineSecondsUSD[community][day]; } function getCommunityDayRewards(address community, uint256 day) external view returns (uint256) { require(_communityExists(community), "invalid community"); // require(day >= communityDayStart[community], '1: invalid day'); // require(day <= dayLastReleasedRewardsFor, '2: invalid day'); return communityDayRewards[community][day]; } function getCommunityDailyRewards(uint256 day) external view returns (uint256) { require(day >= startDay, "invalid day"); uint256 year = _getYearDayIsIn(day); require(year <= MAX_YEARS, "invalid year"); return COMMUNITY_DAILY_REWARDS_BY_YEAR[year]; } function getStrongPoolDailyRewards(uint256 day) external view returns (uint256) { require(day >= startDay, "invalid day"); uint256 year = _getYearDayIsIn(day); require(year <= MAX_YEARS, "invalid year"); return STRONGPOOL_DAILY_REWARDS_BY_YEAR[year]; } function getVoterDailyRewards(uint256 day) external view returns (uint256) { require(day >= startDay, "invalid day"); uint256 year = _getYearDayIsIn(day); require(year <= MAX_YEARS, "invalid year"); return VOTER_DAILY_REWARDS_BY_YEAR[year]; } function getStartDay() external view returns (uint256) { return startDay; } function communityAccepted(address community) external view returns (bool) { return _communityExists(community); } function getMaxYears() public view returns (uint256) { return MAX_YEARS; } function getCommunityDayStart(address community) public view returns (uint256) { require(_communityExists(community), "invalid community"); return communityDayStart[community]; } function getSbTimelockAddressUsed() public view returns (address) { return sbTimelock; } function getStrongAddressUsed() public view returns (address) { return address(strongToken); } function getSbTokensAddressUsed() public view returns (address) { return address(sbTokens); } function getSbStrongPoolAddressUsed() public view returns (address) { return address(sbStrongPool); } function getSbVotesAddressUsed() public view returns (address) { return address(sbVotes); } function getCurrentYear() public view returns (uint256) { uint256 day = _getCurrentDay().sub(startDay); return _getYearDayIsIn(day == 0 ? startDay : day); } function getYearDayIsIn(uint256 day) public view returns (uint256) { require(day >= startDay, "invalid day"); return _getYearDayIsIn(day); } function getCurrentDay() public view returns (uint256) { return _getCurrentDay(); } function getDayLastReleasedRewardsFor() public view returns (uint256) { return dayLastReleasedRewardsFor; } // function releaseRewards() public { // uint256 currentDay = _getCurrentDay(); // require(currentDay > dayLastReleasedRewardsFor.add(1), 'already released'); // require(sbTokens.upToDate(), 'need token prices'); // dayLastReleasedRewardsFor = dayLastReleasedRewardsFor.add(1); // uint256 year = _getYearDayIsIn(dayLastReleasedRewardsFor); // require(year <= MAX_YEARS, 'invalid year'); // address[] memory tokenAddresses = sbTokens.getTokens(); // uint256[] memory tokenPrices = sbTokens.getTokenPrices(dayLastReleasedRewardsFor); // for (uint256 i = 0; i < communities.length; i++) { // address community = communities[i]; // uint256 sum = 0; // for (uint256 j = 0; j < tokenAddresses.length; j++) { // address token = tokenAddresses[j]; // (, , uint256 minedSeconds) = sbCommunityInterface(community).getTokenData(token, dayLastReleasedRewardsFor); // uint256 tokenPrice = tokenPrices[j]; // uint256 minedSecondsUSD = tokenPrice.mul(minedSeconds).div(1e18); // sum = sum.add(minedSecondsUSD); // } // communityDayMineSecondsUSD[community][dayLastReleasedRewardsFor] = sum; // dayMineSecondsUSDTotal[dayLastReleasedRewardsFor] = dayMineSecondsUSDTotal[dayLastReleasedRewardsFor].add(sum); // } // for (uint256 i = 0; i < communities.length; i++) { // address community = communities[i]; // if (communityDayMineSecondsUSD[community][dayLastReleasedRewardsFor] == 0) { // continue; // } // communityDayRewards[community][dayLastReleasedRewardsFor] = communityDayMineSecondsUSD[community][dayLastReleasedRewardsFor] // .mul(COMMUNITY_DAILY_REWARDS_BY_YEAR[year]) // .div(dayMineSecondsUSDTotal[dayLastReleasedRewardsFor]); // uint256 amount = communityDayRewards[community][dayLastReleasedRewardsFor]; // strongToken.approve(community, amount); // sbCommunityInterface(community).receiveRewards(dayLastReleasedRewardsFor, amount); // emit RewardsReleased(community, amount, currentDay); // } // (, , uint256 strongPoolMineSeconds) = sbStrongPool.getMineData(dayLastReleasedRewardsFor); // if (strongPoolMineSeconds != 0) { // strongToken.approve(address(sbStrongPool), STRONGPOOL_DAILY_REWARDS_BY_YEAR[year]); // sbStrongPool.receiveRewards(dayLastReleasedRewardsFor, STRONGPOOL_DAILY_REWARDS_BY_YEAR[year]); // emit RewardsReleased(address(sbStrongPool), STRONGPOOL_DAILY_REWARDS_BY_YEAR[year], currentDay); // } // bool hasVoteSeconds = false; // for (uint256 i = 0; i < communities.length; i++) { // address community = communities[i]; // (, , uint256 voteSeconds) = sbVotes.getCommunityData(community, dayLastReleasedRewardsFor); // if (voteSeconds > 0) { // hasVoteSeconds = true; // break; // } // } // if (hasVoteSeconds) { // strongToken.approve(address(sbVotes), VOTER_DAILY_REWARDS_BY_YEAR[year]); // sbVotes.receiveVoterRewards(dayLastReleasedRewardsFor, VOTER_DAILY_REWARDS_BY_YEAR[year]); // emit RewardsReleased(address(sbVotes), VOTER_DAILY_REWARDS_BY_YEAR[year], currentDay); // } // } function _getCurrentDay() internal view returns (uint256) { return block.timestamp.div(1 days).add(1); } function _communityExists(address community) internal view returns (bool) { for (uint256 i = 0; i < communities.length; i++) { if (communities[i] == community) { return true; } } return false; } function _getYearDayIsIn(uint256 day) internal view returns (uint256) { return day.sub(startDay).div(366).add(1); // dividing by 366 makes day 1 and 365 be in year 1 } } interface sbStrongPoolInterface { function serviceMinMined(address miner) external view returns (bool); function minerMinMined(address miner) external view returns (bool); function mineFor(address miner, uint256 amount) external; function getMineData(uint256 day) external view returns ( uint256, uint256, uint256 ); function receiveRewards(uint256 day, uint256 amount) external; } interface sbTokensInterface { function getTokens() external view returns (address[] memory); function getTokenPrices(uint256 day) external view returns (uint256[] memory); function tokenAccepted(address token) external view returns (bool); function upToDate() external view returns (bool); function getTokenPrice(address token, uint256 day) external view returns (uint256); } interface sbVotesInterface { function getCommunityData(address community, uint256 day) external view returns ( uint256, uint256, uint256 ); function getPriorProposalVotes(address account, uint256 blockNumber) external view returns (uint96); function receiveServiceRewards(uint256 day, uint256 amount) external; function receiveVoterRewards(uint256 day, uint256 amount) external; function updateVotes( address staker, uint256 rawAmount, bool adding ) external; }

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{"success": true, "error": null, "results": {"detectors": [{"check": "uninitialized-state", "impact": "High", "confidence": "High"}, {"check": "unchecked-transfer", "impact": "High", "confidence": "Medium"}, {"check": "incorrect-equality", "impact": "Medium", "confidence": "High"}]}}

0x8a5e208C1cA217Db8Ee64e8d390CF1f25De35A4e

pragma solidity 0.6.12; library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // This method relies in extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. uint256 size; // solhint-disable-next-line no-inline-assembly assembly { size := extcodesize(account) } return size > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain`call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return _functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); return _functionCallWithValue(target, data, value, errorMessage); } function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) { require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: weiValue }(data); if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } abstract contract Context { function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor () internal { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), msgSender); } /** * @dev Returns the address of the current owner. */ function owner() public view returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(_owner == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { emit OwnershipTransferred(_owner, address(0)); _owner = address(0); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } } library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } library TransferHelper { function safeApprove(address token, address to, uint value) internal { (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x095ea7b3, to, value)); require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: APPROVE_FAILED'); } function safeTransfer(address token, address to, uint value) internal { (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0xa9059cbb, to, value)); require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: TRANSFER_FAILED'); } function safeTransferFrom(address token, address from, address to, uint value) internal { (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x23b872dd, from, to, value)); require(success && (data.length == 0 || abi.decode(data, (bool))), 'TransferHelper: TRANSFER_FROM_FAILED'); } } interface IUniswapV2Pair { function totalSupply() external view returns (uint); function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast); } interface IERCMint { function mint(address _to, uint256 _amount) external; } contract UNCLAirdrop is Ownable { using SafeMath for uint256; IERCMint public uncl; IERC20 public uncx; IERC20 public uncx_weth; uint256 public end_block; bool public token0IsPeg = true; uint256 public uncx_min_deposit = 1e18; mapping(address => uint256) public uncxBalances; mapping(address => uint256) public uncxWethLPBalances; mapping(address => uint256) public uncxWethEffectiveBalances; constructor (IERC20 _uncx, IERC20 _uncxweth, IERCMint _uncl, uint256 _end_block) public { uncl = _uncl; uncx = _uncx; uncx_weth = _uncxweth; end_block = _end_block; } function updateEndBlock (uint256 _end_block) public onlyOwner { end_block = _end_block; } function setToken0IsPeg (bool _value) public onlyOwner { token0IsPeg = _value; } function setMinDeposit (uint256 _min) public onlyOwner { uncx_min_deposit = _min; } function depositUNCX (uint256 _amount) public { require(block.number < end_block, 'AIRDROP PERIOD OVER'); uint256 userBalance = uncxBalances[msg.sender]; uint256 newBalance = userBalance.add(_amount); require(newBalance >= uncx_min_deposit, 'TOO SMALL'); TransferHelper.safeTransferFrom(address(uncx), address(msg.sender), address(this), _amount); uncxBalances[msg.sender] = newBalance; } function withdrawUNCX () public { require(block.number > end_block, 'NOT YET'); uint256 userBalance = uncxBalances[msg.sender]; require(userBalance > 0, 'ZERO BALANCE'); uncxBalances[msg.sender] = 0; TransferHelper.safeTransfer(address(uncx), msg.sender, userBalance); uncl.mint(msg.sender, userBalance.mul(3)); } function depositUNCXWETH (uint256 _amount) public { require(block.number < end_block, 'AIRDROP PERIOD OVER'); uint256 userBalance = uncxWethEffectiveBalances[msg.sender]; IUniswapV2Pair lpair = IUniswapV2Pair(address(uncx_weth)); (uint112 reserve0, uint112 reserve1, ) = lpair.getReserves(); uint256 reserve = token0IsPeg ? reserve0 : reserve1; uint256 uncxValue = _amount.mul(reserve).div(lpair.totalSupply()); uint256 newBalance = userBalance.add(uncxValue); require(newBalance >= uncx_min_deposit, 'TOO SMALL'); TransferHelper.safeTransferFrom(address(uncx_weth), address(msg.sender), address(this), _amount); uncxWethEffectiveBalances[msg.sender] = newBalance; uncxWethLPBalances[msg.sender] = uncxWethLPBalances[msg.sender].add(_amount); } function withdrawUNCXWETH () public { require(block.number > end_block, 'NOT YET'); uint256 userBalance = uncxWethLPBalances[msg.sender]; require(userBalance > 0, 'ZERO BALANCE'); uint256 effectiveBalance = uncxWethEffectiveBalances[msg.sender]; uncxWethLPBalances[msg.sender] = 0; uncxWethEffectiveBalances[msg.sender] = 0; TransferHelper.safeTransfer(address(uncx_weth), msg.sender, userBalance); uncl.mint(msg.sender, effectiveBalance.mul(6)); } function getInfo() external view returns (uint256, uint256) { return (end_block, uncx_min_deposit); } } contract ERC20 is Context, IERC20 { using SafeMath for uint256; using Address for address; mapping (address => uint256) private _balances; mapping (address => mapping (address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; uint8 private _decimals; /** * @dev Sets the values for {name} and {symbol}, initializes {decimals} with * a default value of 18. * * To select a different value for {decimals}, use {_setupDecimals}. * * All three of these values are immutable: they can only be set once during * construction. */ constructor (string memory name, string memory symbol) public { _name = name; _symbol = symbol; _decimals = 18; } /** * @dev Returns the name of the token. */ function name() public view returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5,05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is * called. * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view returns (uint8) { return _decimals; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `recipient` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address recipient, uint256 amount) public virtual override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { _approve(_msgSender(), spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}; * * Requirements: * - `sender` and `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. * - the caller must have allowance for ``sender``'s tokens of at least * `amount`. */ function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) { _transfer(sender, recipient, amount); _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance")); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue)); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero")); return true; } /** * @dev Moves tokens `amount` from `sender` to `recipient`. * * This is internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `sender` cannot be the zero address. * - `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. */ function _transfer(address sender, address recipient, uint256 amount) internal virtual { require(sender != address(0), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(sender, recipient, amount); _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance"); _balances[recipient] = _balances[recipient].add(amount); emit Transfer(sender, recipient, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements * * - `to` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply = _totalSupply.add(amount); _balances[account] = _balances[account].add(amount); emit Transfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance"); _totalSupply = _totalSupply.sub(amount); emit Transfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens. * * This internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve(address owner, address spender, uint256 amount) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Sets {decimals} to a value other than the default one of 18. * * WARNING: This function should only be called from the constructor. Most * applications that interact with token contracts will not expect * {decimals} to ever change, and may work incorrectly if it does. */ function _setupDecimals(uint8 decimals_) internal { _decimals = decimals_; } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be to transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { } }

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{"success": true, "error": null, "results": {"detectors": [{"check": "reentrancy-no-eth", "impact": "Medium", "confidence": "Medium"}]}}

0x8aC850B0D2251643218cB6608ef9Ba91417d0676

pragma solidity 0.6.5; abstract contract Proxy { // /////////////////////// EVENTS /////////////////////////////////////////////////////////////////////////// event ProxyImplementationUpdated( address indexed previousImplementation, address indexed newImplementation ); // /////////////////////// CONSTRUCTOR ////////////////////////////////////////////////////////////////////// function _setImplementation(address newImplementation, bytes memory data) internal { address previousImplementation; // solhint-disable-next-line security/no-inline-assembly assembly { previousImplementation := sload( 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc ) } // solhint-disable-next-line security/no-inline-assembly assembly { sstore( 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc, newImplementation ) } emit ProxyImplementationUpdated( previousImplementation, newImplementation ); if (data.length > 0) { (bool success, ) = newImplementation.delegatecall(data); if (!success) { assembly { // This assembly ensure the revert contains the exact string data let returnDataSize := returndatasize() returndatacopy(0, 0, returnDataSize) revert(0, returnDataSize) } } } } // ///////////////////// EXTERNAL /////////////////////////////////////////////////////////////////////////// receive() external payable { _fallback(); } fallback() external payable { _fallback(); } // ///////////////////////// INTERNAL ////////////////////////////////////////////////////////////////////// function _fallback() internal { // solhint-disable-next-line security/no-inline-assembly assembly { let implementationAddress := sload( 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc ) calldatacopy(0x0, 0x0, calldatasize()) let success := delegatecall( gas(), implementationAddress, 0x0, calldatasize(), 0, 0 ) let retSz := returndatasize() returndatacopy(0, 0, retSz) switch success case 0 { revert(0, retSz) } default { return(0, retSz) } } } } contract TransparentProxy is Proxy { // /////////////////////// CONSTRUCTOR ////////////////////////////////////////////////////////////////////// constructor( address implementationAddress, bytes memory data, address adminAddress ) public { _setImplementation(implementationAddress, data); _setAdmin(adminAddress); } // ///////////////////// EXTERNAL /////////////////////////////////////////////////////////////////////////// function changeImplementation( address newImplementation, bytes calldata data ) external ifAdmin { _setImplementation(newImplementation, data); } function proxyAdmin() external ifAdmin returns (address) { return _admin(); } // Transfer of adminship on the other hand is only visible to the admin of the Proxy function changeProxyAdmin(address newAdmin) external ifAdmin { uint256 disabled; // solhint-disable-next-line security/no-inline-assembly assembly { disabled := sload( 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6102 ) } require(disabled == 0, "changeAdmin has been disabled"); _setAdmin(newAdmin); } // to be used if EIP-173 needs to be implemented in the implementation contract so that change of admin can be constrained // in a way that OwnershipTransfered is trigger all the time function disableChangeProxyAdmin() external ifAdmin { // solhint-disable-next-line security/no-inline-assembly assembly { sstore( 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6102, 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF ) } } // /////////////////////// MODIFIERS //////////////////////////////////////////////////////////////////////// modifier ifAdmin() { if (msg.sender == _admin()) { _; } else { _fallback(); } } // ///////////////////////// INTERNAL ////////////////////////////////////////////////////////////////////// function _admin() internal view returns (address adminAddress) { // solhint-disable-next-line security/no-inline-assembly assembly { adminAddress := sload( 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103 ) } } function _setAdmin(address newAdmin) internal { // solhint-disable-next-line security/no-inline-assembly assembly { sstore( 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103, newAdmin ) } } }

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{"success": true, "error": null, "results": {"detectors": [{"check": "controlled-delegatecall", "impact": "High", "confidence": "Medium"}]}}

0x8C311cdcB9B03a3242D0c20B3dC95cA6d709B52D

pragma solidity 0.6.6; pragma experimental ABIEncoderV2; contract DSAuthEvents { event LogSetAuthority(address indexed authority); event LogSetOwner(address indexed owner); } contract DSAuth is DSAuthEvents { DSAuthority public authority; address public owner; constructor() public { owner = msg.sender; emit LogSetOwner(msg.sender); } function setOwner(address owner_) public auth { owner = owner_; emit LogSetOwner(owner); } function setAuthority(DSAuthority authority_) public auth { authority = authority_; emit LogSetAuthority(address(authority)); } modifier auth { require(isAuthorized(msg.sender, msg.sig)); _; } function isAuthorized(address src, bytes4 sig) internal view returns (bool) { if (src == address(this)) { return true; } else if (src == owner) { return true; } else if (authority == DSAuthority(0)) { return false; } else { return authority.canCall(src, address(this), sig); } } } abstract contract DSAuthority { function canCall(address src, address dst, bytes4 sig) public virtual view returns (bool); } abstract contract DSGuard { function canCall(address src_, address dst_, bytes4 sig) public view virtual returns (bool); function permit(bytes32 src, bytes32 dst, bytes32 sig) public virtual; function forbid(bytes32 src, bytes32 dst, bytes32 sig) public virtual; function permit(address src, address dst, bytes32 sig) public virtual; function forbid(address src, address dst, bytes32 sig) public virtual; } abstract contract DSGuardFactory { function newGuard() public virtual returns (DSGuard guard); } contract DSMath { function add(uint256 x, uint256 y) internal pure returns (uint256 z) { require((z = x + y) >= x); } function sub(uint256 x, uint256 y) internal pure returns (uint256 z) { require((z = x - y) <= x); } function mul(uint256 x, uint256 y) internal pure returns (uint256 z) { require(y == 0 || (z = x * y) / y == x); } function div(uint256 x, uint256 y) internal pure returns (uint256 z) { return x / y; } function min(uint256 x, uint256 y) internal pure returns (uint256 z) { return x <= y ? x : y; } function max(uint256 x, uint256 y) internal pure returns (uint256 z) { return x >= y ? x : y; } function imin(int256 x, int256 y) internal pure returns (int256 z) { return x <= y ? x : y; } function imax(int256 x, int256 y) internal pure returns (int256 z) { return x >= y ? x : y; } uint256 constant WAD = 10**18; uint256 constant RAY = 10**27; function wmul(uint256 x, uint256 y) internal pure returns (uint256 z) { z = add(mul(x, y), WAD / 2) / WAD; } function rmul(uint256 x, uint256 y) internal pure returns (uint256 z) { z = add(mul(x, y), RAY / 2) / RAY; } function wdiv(uint256 x, uint256 y) internal pure returns (uint256 z) { z = add(mul(x, WAD), y / 2) / y; } function rdiv(uint256 x, uint256 y) internal pure returns (uint256 z) { z = add(mul(x, RAY), y / 2) / y; } // This famous algorithm is called "exponentiation by squaring" // and calculates x^n with x as fixed-point and n as regular unsigned. // // It's O(log n), instead of O(n) for naive repeated multiplication. // // These facts are why it works: // // If n is even, then x^n = (x^2)^(n/2). // If n is odd, then x^n = x * x^(n-1), // and applying the equation for even x gives // x^n = x * (x^2)^((n-1) / 2). // // Also, EVM division is flooring and // floor[(n-1) / 2] = floor[n / 2]. // function rpow(uint256 x, uint256 n) internal pure returns (uint256 z) { z = n % 2 != 0 ? x : RAY; for (n /= 2; n != 0; n /= 2) { x = rmul(x, x); if (n % 2 != 0) { z = rmul(z, x); } } } } contract DSNote { event LogNote( bytes4 indexed sig, address indexed guy, bytes32 indexed foo, bytes32 indexed bar, uint256 wad, bytes fax ) anonymous; modifier note { bytes32 foo; bytes32 bar; assembly { foo := calldataload(4) bar := calldataload(36) } emit LogNote(msg.sig, msg.sender, foo, bar, msg.value, msg.data); _; } } abstract contract DSProxy is DSAuth, DSNote { DSProxyCache public cache; // global cache for contracts constructor(address _cacheAddr) public { require(setCache(_cacheAddr)); } // solhint-disable-next-line no-empty-blocks receive() external payable {} // use the proxy to execute calldata _data on contract _code // function execute(bytes memory _code, bytes memory _data) // public // payable // virtual // returns (address target, bytes32 response); function execute(address _target, bytes memory _data) public payable virtual returns (bytes32 response); //set new cache function setCache(address _cacheAddr) public virtual payable returns (bool); } contract DSProxyCache { mapping(bytes32 => address) cache; function read(bytes memory _code) public view returns (address) { bytes32 hash = keccak256(_code); return cache[hash]; } function write(bytes memory _code) public returns (address target) { assembly { target := create(0, add(_code, 0x20), mload(_code)) switch iszero(extcodesize(target)) case 1 { // throw if contract failed to deploy revert(0, 0) } } bytes32 hash = keccak256(_code); cache[hash] = target; } } abstract contract DSProxyFactoryInterface { function build(address owner) public virtual returns (DSProxy proxy); } contract Migrations { address public owner; uint public last_completed_migration; modifier restricted() { if (msg.sender == owner) _; } constructor() public { owner = msg.sender; } function setCompleted(uint completed) public restricted { last_completed_migration = completed; } function upgrade(address new_address) public restricted { Migrations upgraded = Migrations(new_address); upgraded.setCompleted(last_completed_migration); } } contract AaveHelper is DSMath { using SafeERC20 for ERC20; address payable public constant WALLET_ADDR = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; address public constant DISCOUNT_ADDR = 0x1b14E8D511c9A4395425314f849bD737BAF8208F; uint public constant MANUAL_SERVICE_FEE = 400; // 0.25% Fee uint public constant AUTOMATIC_SERVICE_FEE = 333; // 0.3% Fee address public constant BOT_REGISTRY_ADDRESS = 0x637726f8b08a7ABE3aE3aCaB01A80E2d8ddeF77B; address public constant ETH_ADDR = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant AAVE_LENDING_POOL_ADDRESSES = 0x24a42fD28C976A61Df5D00D0599C34c4f90748c8; uint public constant NINETY_NINE_PERCENT_WEI = 999900000000000000; uint16 public constant AAVE_REFERRAL_CODE = 64; /// @param _collateralAddress underlying token address /// @param _user users address function getMaxCollateral(address _collateralAddress, address _user) public view returns (uint256) { address lendingPoolAddressDataProvider = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolDataProvider(); address lendingPoolCoreAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); // fetch all needed data // using LTV as tokenLiquidationThreshold (,uint256 totalCollateralETH, uint256 totalBorrowsETH,,uint256 currentLiquidationThreshold,,,) = ILendingPool(lendingPoolAddressDataProvider).calculateUserGlobalData(_user); (,uint256 tokenLiquidationThreshold,,) = ILendingPool(lendingPoolCoreAddress).getReserveConfiguration(_collateralAddress); uint256 collateralPrice = IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_collateralAddress); uint256 userTokenBalance = ILendingPool(lendingPoolCoreAddress).getUserUnderlyingAssetBalance(_collateralAddress, _user); uint256 userTokenBalanceEth = wmul(userTokenBalance, collateralPrice); // if borrow is 0, return whole user balance if (totalBorrowsETH == 0) { return userTokenBalance; } uint256 maxCollateralEth = div(sub(mul(currentLiquidationThreshold, totalCollateralETH), mul(totalBorrowsETH, 100)), currentLiquidationThreshold); /// @dev final amount can't be higher than users token balance maxCollateralEth = maxCollateralEth > userTokenBalanceEth ? userTokenBalanceEth : maxCollateralEth; // might happen due to wmul precision if (maxCollateralEth >= totalCollateralETH) { return totalCollateralETH; } // get sum of all other reserves multiplied with their liquidation thresholds by reversing formula uint256 a = sub(wmul(currentLiquidationThreshold, totalCollateralETH), wmul(tokenLiquidationThreshold, userTokenBalanceEth)); // add new collateral amount multiplied by its threshold, and then divide with new total collateral uint256 newLiquidationThreshold = wdiv(add(a, wmul(sub(userTokenBalanceEth, maxCollateralEth), tokenLiquidationThreshold)), sub(totalCollateralETH, maxCollateralEth)); // if new threshold is lower than first one, calculate new max collateral with newLiquidationThreshold if (newLiquidationThreshold < currentLiquidationThreshold) { maxCollateralEth = div(sub(mul(newLiquidationThreshold, totalCollateralETH), mul(totalBorrowsETH, 100)), newLiquidationThreshold); maxCollateralEth = maxCollateralEth > userTokenBalanceEth ? userTokenBalanceEth : maxCollateralEth; } return wmul(wdiv(maxCollateralEth, collateralPrice), NINETY_NINE_PERCENT_WEI); } /// @param _borrowAddress underlying token address /// @param _user users address function getMaxBorrow(address _borrowAddress, address _user) public view returns (uint256) { address lendingPoolAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); (,,,,uint256 availableBorrowsETH,,,) = ILendingPool(lendingPoolAddress).getUserAccountData(_user); uint256 borrowPrice = IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_borrowAddress); return wmul(wdiv(availableBorrowsETH, borrowPrice), NINETY_NINE_PERCENT_WEI); } /// @notice Calculates the fee amount /// @param _amount Amount that is converted /// @param _user Actuall user addr not DSProxy /// @param _gasCost Ether amount of gas we are spending for tx /// @param _tokenAddr token addr. of token we are getting for the fee /// @return feeAmount The amount we took for the fee function getFee(uint _amount, address _user, uint _gasCost, address _tokenAddr) internal returns (uint feeAmount) { address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); uint fee = MANUAL_SERVICE_FEE; if (BotRegistry(BOT_REGISTRY_ADDRESS).botList(tx.origin)) { fee = AUTOMATIC_SERVICE_FEE; } if (Discount(DISCOUNT_ADDR).isCustomFeeSet(_user)) { fee = Discount(DISCOUNT_ADDR).getCustomServiceFee(_user); } feeAmount = (fee == 0) ? 0 : (_amount / fee); if (_gasCost != 0) { uint256 price = IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_tokenAddr); _gasCost = wmul(_gasCost, price); feeAmount = add(feeAmount, _gasCost); } // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } if (_tokenAddr == ETH_ADDR) { WALLET_ADDR.transfer(feeAmount); } else { ERC20(_tokenAddr).safeTransfer(WALLET_ADDR, feeAmount); } } /// @notice Calculates the gas cost for transaction /// @param _amount Amount that is converted /// @param _user Actuall user addr not DSProxy /// @param _gasCost Ether amount of gas we are spending for tx /// @param _tokenAddr token addr. of token we are getting for the fee /// @return gasCost The amount we took for the gas cost function getGasCost(uint _amount, address _user, uint _gasCost, address _tokenAddr) internal returns (uint gasCost) { address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); if (_gasCost != 0) { uint256 price = IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_tokenAddr); _gasCost = wmul(_gasCost, price); gasCost = _gasCost; } // fee can't go over 20% of the whole amount if (gasCost > (_amount / 5)) { gasCost = _amount / 5; } if (_tokenAddr == ETH_ADDR) { WALLET_ADDR.transfer(gasCost); } else { ERC20(_tokenAddr).safeTransfer(WALLET_ADDR, gasCost); } } /// @notice Returns the owner of the DSProxy that called the contract function getUserAddress() internal view returns (address) { DSProxy proxy = DSProxy(payable(address(this))); return proxy.owner(); } /// @notice Approves token contract to pull underlying tokens from the DSProxy /// @param _tokenAddr Token we are trying to approve /// @param _caller Address which will gain the approval function approveToken(address _tokenAddr, address _caller) internal { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeApprove(_caller, uint256(-1)); } } /// @notice Send specific amount from contract to specific user /// @param _token Token we are trying to send /// @param _user User that should receive funds /// @param _amount Amount that should be sent function sendContractBalance(address _token, address _user, uint _amount) public { if (_amount == 0) return; if (_token == ETH_ADDR) { payable(_user).transfer(_amount); } else { ERC20(_token).safeTransfer(_user, _amount); } } function sendFullContractBalance(address _token, address _user) public { if (_token == ETH_ADDR) { sendContractBalance(_token, _user, address(this).balance); } else { sendContractBalance(_token, _user, ERC20(_token).balanceOf(address(this))); } } } contract AaveSafetyRatio is AaveHelper { function getSafetyRatio(address _user) public view returns(uint256) { address lendingPoolAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); (,,uint256 totalBorrowsETH,,uint256 availableBorrowsETH,,,) = ILendingPool(lendingPoolAddress).getUserAccountData(_user); return wdiv(add(totalBorrowsETH, availableBorrowsETH), totalBorrowsETH); } } contract AdminAuth { using SafeERC20 for ERC20; address public owner; address public admin; modifier onlyOwner() { require(owner == msg.sender); _; } constructor() public { owner = msg.sender; } /// @notice Admin is set by owner first time, after that admin is super role and has permission to change owner /// @param _admin Address of multisig that becomes admin function setAdminByOwner(address _admin) public { require(msg.sender == owner); require(admin == address(0)); admin = _admin; } /// @notice Admin is able to set new admin /// @param _admin Address of multisig that becomes new admin function setAdminByAdmin(address _admin) public { require(msg.sender == admin); admin = _admin; } /// @notice Admin is able to change owner /// @param _owner Address of new owner function setOwnerByAdmin(address _owner) public { require(msg.sender == admin); owner = _owner; } /// @notice Destroy the contract function kill() public onlyOwner { selfdestruct(payable(owner)); } /// @notice withdraw stuck funds function withdrawStuckFunds(address _token, uint _amount) public onlyOwner { if (_token == 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE) { payable(owner).transfer(_amount); } else { ERC20(_token).safeTransfer(owner, _amount); } } } contract Auth is AdminAuth { bool public ALL_AUTHORIZED = false; mapping(address => bool) public authorized; modifier onlyAuthorized() { require(ALL_AUTHORIZED || authorized[msg.sender]); _; } constructor() public { authorized[msg.sender] = true; } function setAuthorized(address _user, bool _approved) public onlyOwner { authorized[_user] = _approved; } function setAllAuthorized(bool _authorized) public onlyOwner { ALL_AUTHORIZED = _authorized; } } contract ProxyPermission { address public constant FACTORY_ADDRESS = 0x5a15566417e6C1c9546523066500bDDBc53F88C7; /// @notice Called in the context of DSProxy to authorize an address /// @param _contractAddr Address which will be authorized function givePermission(address _contractAddr) public { address currAuthority = address(DSAuth(address(this)).authority()); DSGuard guard = DSGuard(currAuthority); if (currAuthority == address(0)) { guard = DSGuardFactory(FACTORY_ADDRESS).newGuard(); DSAuth(address(this)).setAuthority(DSAuthority(address(guard))); } guard.permit(_contractAddr, address(this), bytes4(keccak256("execute(address,bytes)"))); } /// @notice Called in the context of DSProxy to remove authority of an address /// @param _contractAddr Auth address which will be removed from authority list function removePermission(address _contractAddr) public { address currAuthority = address(DSAuth(address(this)).authority()); // if there is no authority, that means that contract doesn't have permission if (currAuthority == address(0)) { return; } DSGuard guard = DSGuard(currAuthority); guard.forbid(_contractAddr, address(this), bytes4(keccak256("execute(address,bytes)"))); } } contract CompoundMonitorProxy is AdminAuth { using SafeERC20 for ERC20; uint public CHANGE_PERIOD; address public monitor; address public newMonitor; address public lastMonitor; uint public changeRequestedTimestamp; mapping(address => bool) public allowed; event MonitorChangeInitiated(address oldMonitor, address newMonitor); event MonitorChangeCanceled(); event MonitorChangeFinished(address monitor); event MonitorChangeReverted(address monitor); // if someone who is allowed become malicious, owner can't be changed modifier onlyAllowed() { require(allowed[msg.sender] || msg.sender == owner); _; } modifier onlyMonitor() { require (msg.sender == monitor); _; } constructor(uint _changePeriod) public { CHANGE_PERIOD = _changePeriod * 1 days; } /// @notice Only monitor contract is able to call execute on users proxy /// @param _owner Address of cdp owner (users DSProxy address) /// @param _compoundSaverProxy Address of CompoundSaverProxy /// @param _data Data to send to CompoundSaverProxy function callExecute(address _owner, address _compoundSaverProxy, bytes memory _data) public payable onlyMonitor { // execute reverts if calling specific method fails DSProxyInterface(_owner).execute{value: msg.value}(_compoundSaverProxy, _data); // return if anything left if (address(this).balance > 0) { msg.sender.transfer(address(this).balance); } } /// @notice Allowed users are able to set Monitor contract without any waiting period first time /// @param _monitor Address of Monitor contract function setMonitor(address _monitor) public onlyAllowed { require(monitor == address(0)); monitor = _monitor; } /// @notice Allowed users are able to start procedure for changing monitor /// @dev after CHANGE_PERIOD needs to call confirmNewMonitor to actually make a change /// @param _newMonitor address of new monitor function changeMonitor(address _newMonitor) public onlyAllowed { require(changeRequestedTimestamp == 0); changeRequestedTimestamp = now; lastMonitor = monitor; newMonitor = _newMonitor; emit MonitorChangeInitiated(lastMonitor, newMonitor); } /// @notice At any point allowed users are able to cancel monitor change function cancelMonitorChange() public onlyAllowed { require(changeRequestedTimestamp > 0); changeRequestedTimestamp = 0; newMonitor = address(0); emit MonitorChangeCanceled(); } /// @notice Anyone is able to confirm new monitor after CHANGE_PERIOD if process is started function confirmNewMonitor() public onlyAllowed { require((changeRequestedTimestamp + CHANGE_PERIOD) < now); require(changeRequestedTimestamp != 0); require(newMonitor != address(0)); monitor = newMonitor; newMonitor = address(0); changeRequestedTimestamp = 0; emit MonitorChangeFinished(monitor); } /// @notice Its possible to revert monitor to last used monitor function revertMonitor() public onlyAllowed { require(lastMonitor != address(0)); monitor = lastMonitor; emit MonitorChangeReverted(monitor); } /// @notice Allowed users are able to add new allowed user /// @param _user Address of user that will be allowed function addAllowed(address _user) public onlyAllowed { allowed[_user] = true; } /// @notice Allowed users are able to remove allowed user /// @dev owner is always allowed even if someone tries to remove it from allowed mapping /// @param _user Address of allowed user function removeAllowed(address _user) public onlyAllowed { allowed[_user] = false; } function setChangePeriod(uint _periodInDays) public onlyAllowed { require(_periodInDays * 1 days > CHANGE_PERIOD); CHANGE_PERIOD = _periodInDays * 1 days; } /// @notice In case something is left in contract, owner is able to withdraw it /// @param _token address of token to withdraw balance function withdrawToken(address _token) public onlyOwner { uint balance = ERC20(_token).balanceOf(address(this)); ERC20(_token).safeTransfer(msg.sender, balance); } /// @notice In case something is left in contract, owner is able to withdraw it function withdrawEth() public onlyOwner { uint balance = address(this).balance; msg.sender.transfer(balance); } } contract CompoundSubscriptions is AdminAuth { struct CompoundHolder { address user; uint128 minRatio; uint128 maxRatio; uint128 optimalRatioBoost; uint128 optimalRatioRepay; bool boostEnabled; } struct SubPosition { uint arrPos; bool subscribed; } CompoundHolder[] public subscribers; mapping (address => SubPosition) public subscribersPos; uint public changeIndex; event Subscribed(address indexed user); event Unsubscribed(address indexed user); event Updated(address indexed user); event ParamUpdates(address indexed user, uint128, uint128, uint128, uint128, bool); /// @dev Called by the DSProxy contract which owns the Compound position /// @notice Adds the users Compound poistion in the list of subscriptions so it can be monitored /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalBoost Ratio amount which boost should target /// @param _optimalRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled function subscribe(uint128 _minRatio, uint128 _maxRatio, uint128 _optimalBoost, uint128 _optimalRepay, bool _boostEnabled) external { // if boost is not enabled, set max ratio to max uint uint128 localMaxRatio = _boostEnabled ? _maxRatio : uint128(-1); require(checkParams(_minRatio, localMaxRatio), "Must be correct params"); SubPosition storage subInfo = subscribersPos[msg.sender]; CompoundHolder memory subscription = CompoundHolder({ minRatio: _minRatio, maxRatio: localMaxRatio, optimalRatioBoost: _optimalBoost, optimalRatioRepay: _optimalRepay, user: msg.sender, boostEnabled: _boostEnabled }); changeIndex++; if (subInfo.subscribed) { subscribers[subInfo.arrPos] = subscription; emit Updated(msg.sender); emit ParamUpdates(msg.sender, _minRatio, localMaxRatio, _optimalBoost, _optimalRepay, _boostEnabled); } else { subscribers.push(subscription); subInfo.arrPos = subscribers.length - 1; subInfo.subscribed = true; emit Subscribed(msg.sender); } } /// @notice Called by the users DSProxy /// @dev Owner who subscribed cancels his subscription function unsubscribe() external { _unsubscribe(msg.sender); } /// @dev Checks limit if minRatio is bigger than max /// @param _minRatio Minimum ratio, bellow which repay can be triggered /// @param _maxRatio Maximum ratio, over which boost can be triggered /// @return Returns bool if the params are correct function checkParams(uint128 _minRatio, uint128 _maxRatio) internal pure returns (bool) { if (_minRatio > _maxRatio) { return false; } return true; } /// @dev Internal method to remove a subscriber from the list /// @param _user The actual address that owns the Compound position function _unsubscribe(address _user) internal { require(subscribers.length > 0, "Must have subscribers in the list"); SubPosition storage subInfo = subscribersPos[_user]; require(subInfo.subscribed, "Must first be subscribed"); address lastOwner = subscribers[subscribers.length - 1].user; SubPosition storage subInfo2 = subscribersPos[lastOwner]; subInfo2.arrPos = subInfo.arrPos; subscribers[subInfo.arrPos] = subscribers[subscribers.length - 1]; subscribers.pop(); // remove last element and reduce arr length changeIndex++; subInfo.subscribed = false; subInfo.arrPos = 0; emit Unsubscribed(msg.sender); } /// @dev Checks if the user is subscribed /// @param _user The actual address that owns the Compound position /// @return If the user is subscribed function isSubscribed(address _user) public view returns (bool) { SubPosition storage subInfo = subscribersPos[_user]; return subInfo.subscribed; } /// @dev Returns subscribtion information about a user /// @param _user The actual address that owns the Compound position /// @return Subscription information about the user if exists function getHolder(address _user) public view returns (CompoundHolder memory) { SubPosition storage subInfo = subscribersPos[_user]; return subscribers[subInfo.arrPos]; } /// @notice Helper method to return all the subscribed CDPs /// @return List of all subscribers function getSubscribers() public view returns (CompoundHolder[] memory) { return subscribers; } /// @notice Helper method for the frontend, returns all the subscribed CDPs paginated /// @param _page What page of subscribers you want /// @param _perPage Number of entries per page /// @return List of all subscribers for that page function getSubscribersByPage(uint _page, uint _perPage) public view returns (CompoundHolder[] memory) { CompoundHolder[] memory holders = new CompoundHolder[](_perPage); uint start = _page * _perPage; uint end = start + _perPage; end = (end > holders.length) ? holders.length : end; uint count = 0; for (uint i = start; i < end; i++) { holders[count] = subscribers[i]; count++; } return holders; } ////////////// ADMIN METHODS /////////////////// /// @notice Admin function to unsubscribe a CDP /// @param _user The actual address that owns the Compound position function unsubscribeByAdmin(address _user) public onlyOwner { SubPosition storage subInfo = subscribersPos[_user]; if (subInfo.subscribed) { _unsubscribe(_user); } } } contract CompoundSubscriptionsProxy is ProxyPermission { address public constant COMPOUND_SUBSCRIPTION_ADDRESS = 0x52015EFFD577E08f498a0CCc11905925D58D6207; address public constant COMPOUND_MONITOR_PROXY = 0xB1cF8DE8e791E4Ed1Bd86c03E2fc1f14389Cb10a; /// @notice Calls subscription contract and creates a DSGuard if non existent /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalRatioBoost Ratio amount which boost should target /// @param _optimalRatioRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled function subscribe( uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled ) public { givePermission(COMPOUND_MONITOR_PROXY); ICompoundSubscription(COMPOUND_SUBSCRIPTION_ADDRESS).subscribe( _minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled); } /// @notice Calls subscription contract and updated existing parameters /// @dev If subscription is non existent this will create one /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalRatioBoost Ratio amount which boost should target /// @param _optimalRatioRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled function update( uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled ) public { ICompoundSubscription(COMPOUND_SUBSCRIPTION_ADDRESS).subscribe(_minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled); } /// @notice Calls the subscription contract to unsubscribe the caller function unsubscribe() public { removePermission(COMPOUND_MONITOR_PROXY); ICompoundSubscription(COMPOUND_SUBSCRIPTION_ADDRESS).unsubscribe(); } } contract CompoundCreateTaker is ProxyPermission { using SafeERC20 for ERC20; address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); // solhint-disable-next-line const-name-snakecase DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); struct CreateInfo { address cCollAddress; address cBorrowAddress; uint depositAmount; } /// @notice Main function which will take a FL and open a leverage position /// @dev Call through DSProxy, if _exchangeData.destAddr is a token approve DSProxy /// @param _createInfo [cCollAddress, cBorrowAddress, depositAmount] /// @param _exchangeData Exchange data struct function openLeveragedLoan( CreateInfo memory _createInfo, SaverExchangeCore.ExchangeData memory _exchangeData, address payable _compReceiver ) public payable { uint loanAmount = _exchangeData.srcAmount; // Pull tokens from user if (_exchangeData.destAddr != ETH_ADDRESS) { ERC20(_exchangeData.destAddr).safeTransferFrom(msg.sender, address(this), _createInfo.depositAmount); } else { require(msg.value >= _createInfo.depositAmount, "Must send correct amount of eth"); } // Send tokens to FL receiver sendDeposit(_compReceiver, _exchangeData.destAddr); // Pack the struct data (uint[4] memory numData, address[6] memory cAddresses, bytes memory callData) = _packData(_createInfo, _exchangeData); bytes memory paramsData = abi.encode(numData, cAddresses, callData, address(this)); givePermission(_compReceiver); lendingPool.flashLoan(_compReceiver, _exchangeData.srcAddr, loanAmount, paramsData); removePermission(_compReceiver); logger.Log(address(this), msg.sender, "CompoundLeveragedLoan", abi.encode(_exchangeData.srcAddr, _exchangeData.destAddr, _exchangeData.srcAmount, _exchangeData.destAmount)); } function sendDeposit(address payable _compoundReceiver, address _token) internal { if (_token != ETH_ADDRESS) { ERC20(_token).safeTransfer(_compoundReceiver, ERC20(_token).balanceOf(address(this))); } _compoundReceiver.transfer(address(this).balance); } function _packData( CreateInfo memory _createInfo, SaverExchangeCore.ExchangeData memory exchangeData ) internal pure returns (uint[4] memory numData, address[6] memory cAddresses, bytes memory callData) { numData = [ exchangeData.srcAmount, exchangeData.destAmount, exchangeData.minPrice, exchangeData.price0x ]; cAddresses = [ _createInfo.cCollAddress, _createInfo.cBorrowAddress, exchangeData.srcAddr, exchangeData.destAddr, exchangeData.exchangeAddr, exchangeData.wrapper ]; callData = exchangeData.callData; } } contract CarefulMath { /** * @dev Possible error codes that we can return */ enum MathError { NO_ERROR, DIVISION_BY_ZERO, INTEGER_OVERFLOW, INTEGER_UNDERFLOW } /** * @dev Multiplies two numbers, returns an error on overflow. */ function mulUInt(uint a, uint b) internal pure returns (MathError, uint) { if (a == 0) { return (MathError.NO_ERROR, 0); } uint c = a * b; if (c / a != b) { return (MathError.INTEGER_OVERFLOW, 0); } else { return (MathError.NO_ERROR, c); } } /** * @dev Integer division of two numbers, truncating the quotient. */ function divUInt(uint a, uint b) internal pure returns (MathError, uint) { if (b == 0) { return (MathError.DIVISION_BY_ZERO, 0); } return (MathError.NO_ERROR, a / b); } /** * @dev Subtracts two numbers, returns an error on overflow (i.e. if subtrahend is greater than minuend). */ function subUInt(uint a, uint b) internal pure returns (MathError, uint) { if (b <= a) { return (MathError.NO_ERROR, a - b); } else { return (MathError.INTEGER_UNDERFLOW, 0); } } /** * @dev Adds two numbers, returns an error on overflow. */ function addUInt(uint a, uint b) internal pure returns (MathError, uint) { uint c = a + b; if (c >= a) { return (MathError.NO_ERROR, c); } else { return (MathError.INTEGER_OVERFLOW, 0); } } /** * @dev add a and b and then subtract c */ function addThenSubUInt(uint a, uint b, uint c) internal pure returns (MathError, uint) { (MathError err0, uint sum) = addUInt(a, b); if (err0 != MathError.NO_ERROR) { return (err0, 0); } return subUInt(sum, c); } } contract Exponential is CarefulMath { uint constant expScale = 1e18; uint constant halfExpScale = expScale/2; uint constant mantissaOne = expScale; struct Exp { uint mantissa; } /** * @dev Creates an exponential from numerator and denominator values. * Note: Returns an error if (`num` * 10e18) > MAX_INT, * or if `denom` is zero. */ function getExp(uint num, uint denom) pure internal returns (MathError, Exp memory) { (MathError err0, uint scaledNumerator) = mulUInt(num, expScale); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } (MathError err1, uint rational) = divUInt(scaledNumerator, denom); if (err1 != MathError.NO_ERROR) { return (err1, Exp({mantissa: 0})); } return (MathError.NO_ERROR, Exp({mantissa: rational})); } /** * @dev Adds two exponentials, returning a new exponential. */ function addExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) { (MathError error, uint result) = addUInt(a.mantissa, b.mantissa); return (error, Exp({mantissa: result})); } /** * @dev Subtracts two exponentials, returning a new exponential. */ function subExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) { (MathError error, uint result) = subUInt(a.mantissa, b.mantissa); return (error, Exp({mantissa: result})); } /** * @dev Multiply an Exp by a scalar, returning a new Exp. */ function mulScalar(Exp memory a, uint scalar) pure internal returns (MathError, Exp memory) { (MathError err0, uint scaledMantissa) = mulUInt(a.mantissa, scalar); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } return (MathError.NO_ERROR, Exp({mantissa: scaledMantissa})); } /** * @dev Multiply an Exp by a scalar, then truncate to return an unsigned integer. */ function mulScalarTruncate(Exp memory a, uint scalar) pure internal returns (MathError, uint) { (MathError err, Exp memory product) = mulScalar(a, scalar); if (err != MathError.NO_ERROR) { return (err, 0); } return (MathError.NO_ERROR, truncate(product)); } /** * @dev Multiply an Exp by a scalar, truncate, then add an to an unsigned integer, returning an unsigned integer. */ function mulScalarTruncateAddUInt(Exp memory a, uint scalar, uint addend) pure internal returns (MathError, uint) { (MathError err, Exp memory product) = mulScalar(a, scalar); if (err != MathError.NO_ERROR) { return (err, 0); } return addUInt(truncate(product), addend); } /** * @dev Divide an Exp by a scalar, returning a new Exp. */ function divScalar(Exp memory a, uint scalar) pure internal returns (MathError, Exp memory) { (MathError err0, uint descaledMantissa) = divUInt(a.mantissa, scalar); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } return (MathError.NO_ERROR, Exp({mantissa: descaledMantissa})); } /** * @dev Divide a scalar by an Exp, returning a new Exp. */ function divScalarByExp(uint scalar, Exp memory divisor) pure internal returns (MathError, Exp memory) { /* We are doing this as: getExp(mulUInt(expScale, scalar), divisor.mantissa) How it works: Exp = a / b; Scalar = s; `s / (a / b)` = `b * s / a` and since for an Exp `a = mantissa, b = expScale` */ (MathError err0, uint numerator) = mulUInt(expScale, scalar); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } return getExp(numerator, divisor.mantissa); } /** * @dev Divide a scalar by an Exp, then truncate to return an unsigned integer. */ function divScalarByExpTruncate(uint scalar, Exp memory divisor) pure internal returns (MathError, uint) { (MathError err, Exp memory fraction) = divScalarByExp(scalar, divisor); if (err != MathError.NO_ERROR) { return (err, 0); } return (MathError.NO_ERROR, truncate(fraction)); } /** * @dev Multiplies two exponentials, returning a new exponential. */ function mulExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) { (MathError err0, uint doubleScaledProduct) = mulUInt(a.mantissa, b.mantissa); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } // We add half the scale before dividing so that we get rounding instead of truncation. // See "Listing 6" and text above it at https://accu.org/index.php/journals/1717 // Without this change, a result like 6.6...e-19 will be truncated to 0 instead of being rounded to 1e-18. (MathError err1, uint doubleScaledProductWithHalfScale) = addUInt(halfExpScale, doubleScaledProduct); if (err1 != MathError.NO_ERROR) { return (err1, Exp({mantissa: 0})); } (MathError err2, uint product) = divUInt(doubleScaledProductWithHalfScale, expScale); // The only error `div` can return is MathError.DIVISION_BY_ZERO but we control `expScale` and it is not zero. assert(err2 == MathError.NO_ERROR); return (MathError.NO_ERROR, Exp({mantissa: product})); } /** * @dev Multiplies two exponentials given their mantissas, returning a new exponential. */ function mulExp(uint a, uint b) pure internal returns (MathError, Exp memory) { return mulExp(Exp({mantissa: a}), Exp({mantissa: b})); } /** * @dev Multiplies three exponentials, returning a new exponential. */ function mulExp3(Exp memory a, Exp memory b, Exp memory c) pure internal returns (MathError, Exp memory) { (MathError err, Exp memory ab) = mulExp(a, b); if (err != MathError.NO_ERROR) { return (err, ab); } return mulExp(ab, c); } /** * @dev Divides two exponentials, returning a new exponential. * (a/scale) / (b/scale) = (a/scale) * (scale/b) = a/b, * which we can scale as an Exp by calling getExp(a.mantissa, b.mantissa) */ function divExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) { return getExp(a.mantissa, b.mantissa); } /** * @dev Truncates the given exp to a whole number value. * For example, truncate(Exp{mantissa: 15 * expScale}) = 15 */ function truncate(Exp memory exp) pure internal returns (uint) { // Note: We are not using careful math here as we're performing a division that cannot fail return exp.mantissa / expScale; } /** * @dev Checks if first Exp is less than second Exp. */ function lessThanExp(Exp memory left, Exp memory right) pure internal returns (bool) { return left.mantissa < right.mantissa; } /** * @dev Checks if left Exp <= right Exp. */ function lessThanOrEqualExp(Exp memory left, Exp memory right) pure internal returns (bool) { return left.mantissa <= right.mantissa; } /** * @dev Checks if left Exp > right Exp. */ function greaterThanExp(Exp memory left, Exp memory right) pure internal returns (bool) { return left.mantissa > right.mantissa; } /** * @dev returns true if Exp is exactly zero */ function isZeroExp(Exp memory value) pure internal returns (bool) { return value.mantissa == 0; } } contract CompoundBorrowProxy { using SafeERC20 for ERC20; address public constant ETH_ADDR = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant COMPTROLLER_ADDR = 0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B; function borrow(address _cCollToken, address _cBorrowToken, address _borrowToken, uint _amount) public { address[] memory markets = new address[](2); markets[0] = _cCollToken; markets[1] = _cBorrowToken; ComptrollerInterface(COMPTROLLER_ADDR).enterMarkets(markets); require(CTokenInterface(_cBorrowToken).borrow(_amount) == 0); // withdraw funds to msg.sender if (_borrowToken != ETH_ADDR) { ERC20(_borrowToken).safeTransfer(msg.sender, ERC20(_borrowToken).balanceOf(address(this))); } else { msg.sender.transfer(address(this).balance); } } } contract AllowanceProxy is AdminAuth { using SafeERC20 for ERC20; address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; // TODO: Real saver exchange address SaverExchange saverExchange = SaverExchange(0x235abFAd01eb1BDa28Ef94087FBAA63E18074926); function callSell(SaverExchangeCore.ExchangeData memory exData) public payable { pullAndSendTokens(exData.srcAddr, exData.srcAmount); saverExchange.sell{value: msg.value}(exData, msg.sender); } function callBuy(SaverExchangeCore.ExchangeData memory exData) public payable { pullAndSendTokens(exData.srcAddr, exData.srcAmount); saverExchange.buy{value: msg.value}(exData, msg.sender); } function pullAndSendTokens(address _tokenAddr, uint _amount) internal { if (_tokenAddr == KYBER_ETH_ADDRESS) { require(msg.value >= _amount, "msg.value smaller than amount"); } else { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(saverExchange), _amount); } } function ownerChangeExchange(address payable _newExchange) public onlyOwner { saverExchange = SaverExchange(_newExchange); } } contract Prices is DSMath { address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; enum ActionType { SELL, BUY } /// @notice Returns the best estimated price from 2 exchanges /// @param _amount Amount of source tokens you want to exchange /// @param _srcToken Address of the source token /// @param _destToken Address of the destination token /// @param _type Type of action SELL|BUY /// @param _wrappers Array of wrapper addresses to compare /// @return (address, uint) The address of the best exchange and the exchange price function getBestPrice( uint256 _amount, address _srcToken, address _destToken, ActionType _type, address[] memory _wrappers ) public returns (address, uint256) { uint256[] memory rates = new uint256[](_wrappers.length); for (uint i=0; i<_wrappers.length; i++) { rates[i] = getExpectedRate(_wrappers[i], _srcToken, _destToken, _amount, _type); } if (_type == ActionType.SELL) { return getBiggestRate(_wrappers, rates); } else { return getSmallestRate(_wrappers, rates); } } /// @notice Return the expected rate from the exchange wrapper /// @dev In case of Oasis/Uniswap handles the different precision tokens /// @param _wrapper Address of exchange wrapper /// @param _srcToken From token /// @param _destToken To token /// @param _amount Amount to be exchanged /// @param _type Type of action SELL|BUY function getExpectedRate( address _wrapper, address _srcToken, address _destToken, uint256 _amount, ActionType _type ) public returns (uint256) { bool success; bytes memory result; if (_type == ActionType.SELL) { (success, result) = _wrapper.call(abi.encodeWithSignature( "getSellRate(address,address,uint256)", _srcToken, _destToken, _amount )); } else { (success, result) = _wrapper.call(abi.encodeWithSignature( "getBuyRate(address,address,uint256)", _srcToken, _destToken, _amount )); } if (success) { return sliceUint(result, 0); } return 0; } /// @notice Finds the biggest rate between exchanges, needed for sell rate /// @param _wrappers Array of wrappers to compare /// @param _rates Array of rates to compare function getBiggestRate( address[] memory _wrappers, uint256[] memory _rates ) internal pure returns (address, uint) { uint256 maxIndex = 0; // starting from 0 in case there is only one rate in array for (uint256 i=0; i<_rates.length; i++) { if (_rates[i] > _rates[maxIndex]) { maxIndex = i; } } return (_wrappers[maxIndex], _rates[maxIndex]); } /// @notice Finds the smallest rate between exchanges, needed for buy rate /// @param _wrappers Array of wrappers to compare /// @param _rates Array of rates to compare function getSmallestRate( address[] memory _wrappers, uint256[] memory _rates ) internal pure returns (address, uint) { uint256 minIndex = 0; // starting from 0 in case there is only one rate in array for (uint256 i=0; i<_rates.length; i++) { if ((_rates[i] < _rates[minIndex] && _rates[i] > 0) || _rates[minIndex] == 0) { minIndex = i; } } return (_wrappers[minIndex], _rates[minIndex]); } function getDecimals(address _token) internal view returns (uint256) { if (_token == KYBER_ETH_ADDRESS) return 18; return ERC20(_token).decimals(); } function sliceUint(bytes memory bs, uint256 start) internal pure returns (uint256) { require(bs.length >= start + 32, "slicing out of range"); uint256 x; assembly { x := mload(add(bs, add(0x20, start))) } return x; } } contract SaverExchangeHelper { using SafeERC20 for ERC20; address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant WETH_ADDRESS = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address payable public constant WALLET_ID = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; address public constant DISCOUNT_ADDRESS = 0x1b14E8D511c9A4395425314f849bD737BAF8208F; address public constant SAVER_EXCHANGE_REGISTRY = 0x25dd3F51e0C3c3Ff164DDC02A8E4D65Bb9cBB12D; address public constant ERC20_PROXY_0X = 0x95E6F48254609A6ee006F7D493c8e5fB97094ceF; address public constant ZRX_ALLOWLIST_ADDR = 0x4BA1f38427b33B8ab7Bb0490200dAE1F1C36823F; function getDecimals(address _token) internal view returns (uint256) { if (_token == KYBER_ETH_ADDRESS) return 18; return ERC20(_token).decimals(); } function getBalance(address _tokenAddr) internal view returns (uint balance) { if (_tokenAddr == KYBER_ETH_ADDRESS) { balance = address(this).balance; } else { balance = ERC20(_tokenAddr).balanceOf(address(this)); } } function approve0xProxy(address _tokenAddr, uint _amount) internal { if (_tokenAddr != KYBER_ETH_ADDRESS) { ERC20(_tokenAddr).safeApprove(address(ERC20_PROXY_0X), _amount); } } function sendLeftover(address _srcAddr, address _destAddr, address payable _to) internal { // send back any leftover ether or tokens if (address(this).balance > 0) { _to.transfer(address(this).balance); } if (getBalance(_srcAddr) > 0) { ERC20(_srcAddr).safeTransfer(_to, getBalance(_srcAddr)); } if (getBalance(_destAddr) > 0) { ERC20(_destAddr).safeTransfer(_to, getBalance(_destAddr)); } } function sliceUint(bytes memory bs, uint256 start) internal pure returns (uint256) { require(bs.length >= start + 32, "slicing out of range"); uint256 x; assembly { x := mload(add(bs, add(0x20, start))) } return x; } } contract SaverExchangeRegistry is AdminAuth { mapping(address => bool) private wrappers; constructor() public { wrappers[0x880A845A85F843a5c67DB2061623c6Fc3bB4c511] = true; wrappers[0x4c9B55f2083629A1F7aDa257ae984E03096eCD25] = true; wrappers[0x42A9237b872368E1bec4Ca8D26A928D7d39d338C] = true; } function addWrapper(address _wrapper) public onlyOwner { wrappers[_wrapper] = true; } function removeWrapper(address _wrapper) public onlyOwner { wrappers[_wrapper] = false; } function isWrapper(address _wrapper) public view returns(bool) { return wrappers[_wrapper]; } } abstract contract CEtherInterface { function mint() external virtual payable; function repayBorrow() external virtual payable; } abstract contract Cat { struct Ilk { address flip; // Liquidator uint256 chop; // Liquidation Penalty [ray] uint256 lump; // Liquidation Quantity [wad] } mapping (bytes32 => Ilk) public ilks; } abstract contract CompoundOracleInterface { function getUnderlyingPrice(address cToken) external view virtual returns (uint); } abstract contract ComptrollerInterface { function enterMarkets(address[] calldata cTokens) external virtual returns (uint256[] memory); function exitMarket(address cToken) external virtual returns (uint256); function getAssetsIn(address account) external virtual view returns (address[] memory); function markets(address account) public virtual view returns (bool, uint256); function getAccountLiquidity(address account) external virtual view returns (uint256, uint256, uint256); function claimComp(address holder) virtual public; function oracle() public virtual view returns (address); } abstract contract DSProxyInterface { /// Truffle wont compile if this isn't commented // function execute(bytes memory _code, bytes memory _data) // public virtual // payable // returns (address, bytes32); function execute(address _target, bytes memory _data) public virtual payable returns (bytes32); function setCache(address _cacheAddr) public virtual payable returns (bool); function owner() public virtual returns (address); } abstract contract GemLike { function approve(address, uint) public virtual; function transfer(address, uint) public virtual; function transferFrom(address, address, uint) public virtual; function deposit() public virtual payable; function withdraw(uint) public virtual; } abstract contract ManagerLike { function cdpCan(address, uint, address) public virtual view returns (uint); function ilks(uint) public virtual view returns (bytes32); function owns(uint) public virtual view returns (address); function urns(uint) public virtual view returns (address); function vat() public virtual view returns (address); function open(bytes32) public virtual returns (uint); function give(uint, address) public virtual; function cdpAllow(uint, address, uint) public virtual; function urnAllow(address, uint) public virtual; function frob(uint, int, int) public virtual; function frob(uint, address, int, int) public virtual; function flux(uint, address, uint) public virtual; function move(uint, address, uint) public virtual; function exit(address, uint, address, uint) public virtual; function quit(uint, address) public virtual; function enter(address, uint) public virtual; function shift(uint, uint) public virtual; } abstract contract VatLike { function can(address, address) public virtual view returns (uint); function ilks(bytes32) public virtual view returns (uint, uint, uint, uint, uint); function dai(address) public virtual view returns (uint); function urns(bytes32, address) public virtual view returns (uint, uint); function frob(bytes32, address, address, address, int, int) public virtual; function hope(address) public virtual; function move(address, address, uint) public virtual; } abstract contract GemJoinLike { function dec() public virtual returns (uint); function gem() public virtual returns (GemLike); function join(address, uint) public virtual payable; function exit(address, uint) public virtual; } abstract contract GNTJoinLike { function bags(address) public virtual view returns (address); function make(address) public virtual returns (address); } abstract contract DaiJoinLike { function vat() public virtual returns (VatLike); function dai() public virtual returns (GemLike); function join(address, uint) public virtual payable; function exit(address, uint) public virtual; } abstract contract HopeLike { function hope(address) public virtual; function nope(address) public virtual; } abstract contract EndLike { function fix(bytes32) public virtual view returns (uint); function cash(bytes32, uint) public virtual; function free(bytes32) public virtual; function pack(uint) public virtual; function skim(bytes32, address) public virtual; } abstract contract JugLike { function drip(bytes32) public virtual; } abstract contract PotLike { function chi() public virtual view returns (uint); function pie(address) public virtual view returns (uint); function drip() public virtual; function join(uint) public virtual; function exit(uint) public virtual; } abstract contract ProxyRegistryLike { function proxies(address) public virtual view returns (address); function build(address) public virtual returns (address); } abstract contract ProxyLike { function owner() public virtual view returns (address); } abstract contract DssProxyActions { function daiJoin_join(address apt, address urn, uint wad) public virtual; function transfer(address gem, address dst, uint wad) public virtual; function ethJoin_join(address apt, address urn) public virtual payable; function gemJoin_join(address apt, address urn, uint wad, bool transferFrom) public virtual payable; function hope(address obj, address usr) public virtual; function nope(address obj, address usr) public virtual; function open(address manager, bytes32 ilk, address usr) public virtual returns (uint cdp); function give(address manager, uint cdp, address usr) public virtual; function giveToProxy(address proxyRegistry, address manager, uint cdp, address dst) public virtual; function cdpAllow(address manager, uint cdp, address usr, uint ok) public virtual; function urnAllow(address manager, address usr, uint ok) public virtual; function flux(address manager, uint cdp, address dst, uint wad) public virtual; function move(address manager, uint cdp, address dst, uint rad) public virtual; function frob(address manager, uint cdp, int dink, int dart) public virtual; function frob(address manager, uint cdp, address dst, int dink, int dart) public virtual; function quit(address manager, uint cdp, address dst) public virtual; function enter(address manager, address src, uint cdp) public virtual; function shift(address manager, uint cdpSrc, uint cdpOrg) public virtual; function makeGemBag(address gemJoin) public virtual returns (address bag); function lockETH(address manager, address ethJoin, uint cdp) public virtual payable; function safeLockETH(address manager, address ethJoin, uint cdp, address owner) public virtual payable; function lockGem(address manager, address gemJoin, uint cdp, uint wad, bool transferFrom) public virtual; function safeLockGem(address manager, address gemJoin, uint cdp, uint wad, bool transferFrom, address owner) public virtual; function freeETH(address manager, address ethJoin, uint cdp, uint wad) public virtual; function freeGem(address manager, address gemJoin, uint cdp, uint wad) public virtual; function draw(address manager, address jug, address daiJoin, uint cdp, uint wad) public virtual; function wipe(address manager, address daiJoin, uint cdp, uint wad) public virtual; function safeWipe(address manager, address daiJoin, uint cdp, uint wad, address owner) public virtual; function wipeAll(address manager, address daiJoin, uint cdp) public virtual; function safeWipeAll(address manager, address daiJoin, uint cdp, address owner) public virtual; function lockETHAndDraw(address manager, address jug, address ethJoin, address daiJoin, uint cdp, uint wadD) public virtual payable; function openLockETHAndDraw(address manager, address jug, address ethJoin, address daiJoin, bytes32 ilk, uint wadD) public virtual payable returns (uint cdp); function lockGemAndDraw(address manager, address jug, address gemJoin, address daiJoin, uint cdp, uint wadC, uint wadD, bool transferFrom) public virtual; function openLockGemAndDraw(address manager, address jug, address gemJoin, address daiJoin, bytes32 ilk, uint wadC, uint wadD, bool transferFrom) public virtual returns (uint cdp); function openLockGNTAndDraw(address manager, address jug, address gntJoin, address daiJoin, bytes32 ilk, uint wadC, uint wadD) public virtual returns (address bag, uint cdp); function wipeAndFreeETH(address manager, address ethJoin, address daiJoin, uint cdp, uint wadC, uint wadD) public virtual; function wipeAllAndFreeETH(address manager, address ethJoin, address daiJoin, uint cdp, uint wadC) public virtual; function wipeAndFreeGem(address manager, address gemJoin, address daiJoin, uint cdp, uint wadC, uint wadD) public virtual; function wipeAllAndFreeGem(address manager, address gemJoin, address daiJoin, uint cdp, uint wadC) public virtual; } abstract contract DaiJoin { function vat() public virtual returns (Vat); function dai() public virtual returns (Gem); function join(address, uint) public virtual payable; function exit(address, uint) public virtual; } abstract contract DssProxyActionsDsr { function join(address daiJoin, address pot, uint wad) virtual public; function exit(address daiJoin, address pot, uint wad) virtual public; function exitAll(address daiJoin, address pot) virtual public; } interface ERC20 { function totalSupply() external view returns (uint256 supply); function balanceOf(address _owner) external view returns (uint256 balance); function transfer(address _to, uint256 _value) external returns (bool success); function transferFrom(address _from, address _to, uint256 _value) external returns (bool success); function approve(address _spender, uint256 _value) external returns (bool success); function allowance(address _owner, address _spender) external view returns (uint256 remaining); function decimals() external view returns (uint256 digits); event Approval(address indexed _owner, address indexed _spender, uint256 _value); } interface ExchangeInterface { function swapEtherToToken(uint256 _ethAmount, address _tokenAddress, uint256 _maxAmount) external payable returns (uint256, uint256); function swapTokenToEther(address _tokenAddress, uint256 _amount, uint256 _maxAmount) external returns (uint256); function swapTokenToToken(address _src, address _dest, uint256 _amount) external payable returns (uint256); function getExpectedRate(address src, address dest, uint256 srcQty) external view returns (uint256 expectedRate); } interface ExchangeInterfaceV2 { function sell(address _srcAddr, address _destAddr, uint _srcAmount) external payable returns (uint); function buy(address _srcAddr, address _destAddr, uint _destAmount) external payable returns(uint); function getSellRate(address _srcAddr, address _destAddr, uint _srcAmount) external view returns (uint); function getBuyRate(address _srcAddr, address _destAddr, uint _srcAmount) external view returns (uint); } abstract contract Faucet { function gulp(address) public virtual; } abstract contract Flipper { function bids(uint _bidId) public virtual returns (uint256, uint256, address, uint48, uint48, address, address, uint256); function tend(uint id, uint lot, uint bid) virtual external; function dent(uint id, uint lot, uint bid) virtual external; function deal(uint id) virtual external; } abstract contract GasTokenInterface is ERC20 { function free(uint256 value) public virtual returns (bool success); function freeUpTo(uint256 value) public virtual returns (uint256 freed); function freeFrom(address from, uint256 value) public virtual returns (bool success); function freeFromUpTo(address from, uint256 value) public virtual returns (uint256 freed); } abstract contract Gem { function dec() virtual public returns (uint); function gem() virtual public returns (Gem); function join(address, uint) virtual public payable; function exit(address, uint) virtual public; function approve(address, uint) virtual public; function transfer(address, uint) virtual public returns (bool); function transferFrom(address, address, uint) virtual public returns (bool); function deposit() virtual public payable; function withdraw(uint) virtual public; function allowance(address, address) virtual public returns (uint); } abstract contract GetCdps { function getCdpsAsc(address manager, address guy) external view virtual returns (uint[] memory ids, address[] memory urns, bytes32[] memory ilks); function getCdpsDesc(address manager, address guy) external view virtual returns (uint[] memory ids, address[] memory urns, bytes32[] memory ilks); } abstract contract IAToken { function redeem(uint256 _amount) external virtual; } abstract contract IAaveSubscription { function subscribe(uint128 _minRatio, uint128 _maxRatio, uint128 _optimalBoost, uint128 _optimalRepay, bool _boostEnabled) public virtual; function unsubscribe() public virtual; } abstract contract ICompoundSubscription { function subscribe(uint128 _minRatio, uint128 _maxRatio, uint128 _optimalBoost, uint128 _optimalRepay, bool _boostEnabled) public virtual; function unsubscribe() public virtual; } abstract contract ILendingPool { function flashLoan( address payable _receiver, address _reserve, uint _amount, bytes calldata _params) external virtual; function deposit(address _reserve, uint256 _amount, uint16 _referralCode) external virtual payable; function setUserUseReserveAsCollateral(address _reserve, bool _useAsCollateral) external virtual; function borrow(address _reserve, uint256 _amount, uint256 _interestRateMode, uint16 _referralCode) external virtual; function repay( address _reserve, uint256 _amount, address payable _onBehalfOf) external virtual payable; function swapBorrowRateMode(address _reserve) external virtual; function getReserves() external virtual view returns(address[] memory); /// @param _reserve underlying token address function getReserveData(address _reserve) external virtual view returns ( uint256 totalLiquidity, // reserve total liquidity uint256 availableLiquidity, // reserve available liquidity for borrowing uint256 totalBorrowsStable, // total amount of outstanding borrows at Stable rate uint256 totalBorrowsVariable, // total amount of outstanding borrows at Variable rate uint256 liquidityRate, // current deposit APY of the reserve for depositors, in Ray units. uint256 variableBorrowRate, // current variable rate APY of the reserve pool, in Ray units. uint256 stableBorrowRate, // current stable rate APY of the reserve pool, in Ray units. uint256 averageStableBorrowRate, // current average stable borrow rate uint256 utilizationRate, // expressed as total borrows/total liquidity. uint256 liquidityIndex, // cumulative liquidity index uint256 variableBorrowIndex, // cumulative variable borrow index address aTokenAddress, // aTokens contract address for the specific _reserve uint40 lastUpdateTimestamp // timestamp of the last update of reserve data ); /// @param _user users address function getUserAccountData(address _user) external virtual view returns ( uint256 totalLiquidityETH, // user aggregated deposits across all the reserves. In Wei uint256 totalCollateralETH, // user aggregated collateral across all the reserves. In Wei uint256 totalBorrowsETH, // user aggregated outstanding borrows across all the reserves. In Wei uint256 totalFeesETH, // user aggregated current outstanding fees in ETH. In Wei uint256 availableBorrowsETH, // user available amount to borrow in ETH uint256 currentLiquidationThreshold, // user current average liquidation threshold across all the collaterals deposited uint256 ltv, // user average Loan-to-Value between all the collaterals uint256 healthFactor // user current Health Factor ); /// @param _reserve underlying token address /// @param _user users address function getUserReserveData(address _reserve, address _user) external virtual view returns ( uint256 currentATokenBalance, // user current reserve aToken balance uint256 currentBorrowBalance, // user current reserve outstanding borrow balance uint256 principalBorrowBalance, // user balance of borrowed asset uint256 borrowRateMode, // user borrow rate mode either Stable or Variable uint256 borrowRate, // user current borrow rate APY uint256 liquidityRate, // user current earn rate on _reserve uint256 originationFee, // user outstanding loan origination fee uint256 variableBorrowIndex, // user variable cumulative index uint256 lastUpdateTimestamp, // Timestamp of the last data update bool usageAsCollateralEnabled // Whether the user's current reserve is enabled as a collateral ); function getReserveConfigurationData(address _reserve) external virtual view returns ( uint256 ltv, uint256 liquidationThreshold, uint256 liquidationBonus, address rateStrategyAddress, bool usageAsCollateralEnabled, bool borrowingEnabled, bool stableBorrowRateEnabled, bool isActive ); // ------------------ LendingPoolCoreData ------------------------ function getReserveATokenAddress(address _reserve) public virtual view returns (address); function getReserveConfiguration(address _reserve) external virtual view returns (uint256, uint256, uint256, bool); function getUserUnderlyingAssetBalance(address _reserve, address _user) public virtual view returns (uint256); function getReserveCurrentLiquidityRate(address _reserve) public virtual view returns (uint256); function getReserveCurrentVariableBorrowRate(address _reserve) public virtual view returns (uint256); function getReserveTotalLiquidity(address _reserve) public virtual view returns (uint256); function getReserveAvailableLiquidity(address _reserve) public virtual view returns (uint256); function getReserveTotalBorrowsVariable(address _reserve) public virtual view returns (uint256); // ---------------- LendingPoolDataProvider --------------------- function calculateUserGlobalData(address _user) public virtual view returns ( uint256 totalLiquidityBalanceETH, uint256 totalCollateralBalanceETH, uint256 totalBorrowBalanceETH, uint256 totalFeesETH, uint256 currentLtv, uint256 currentLiquidationThreshold, uint256 healthFactor, bool healthFactorBelowThreshold ); } abstract contract ILendingPoolAddressesProvider { function getLendingPool() public virtual view returns (address); function getLendingPoolCore() public virtual view returns (address payable); function getLendingPoolConfigurator() public virtual view returns (address); function getLendingPoolDataProvider() public virtual view returns (address); function getLendingPoolParametersProvider() public virtual view returns (address); function getTokenDistributor() public virtual view returns (address); function getFeeProvider() public virtual view returns (address); function getLendingPoolLiquidationManager() public virtual view returns (address); function getLendingPoolManager() public virtual view returns (address); function getPriceOracle() public virtual view returns (address); function getLendingRateOracle() public virtual view returns (address); } abstract contract ILoanShifter { function getLoanAmount(uint, address) public view virtual returns(uint); function getUnderlyingAsset(address _addr) public view virtual returns (address); } abstract contract IPriceOracleGetterAave { function getAssetPrice(address _asset) external virtual view returns (uint256); function getAssetsPrices(address[] calldata _assets) external virtual view returns(uint256[] memory); function getSourceOfAsset(address _asset) external virtual view returns(address); function getFallbackOracle() external virtual view returns(address); } abstract contract ITokenInterface is ERC20 { function assetBalanceOf(address _owner) public virtual view returns (uint256); function mint(address receiver, uint256 depositAmount) external virtual returns (uint256 mintAmount); function burn(address receiver, uint256 burnAmount) external virtual returns (uint256 loanAmountPaid); function tokenPrice() public virtual view returns (uint256 price); } abstract contract Join { bytes32 public ilk; function dec() virtual public view returns (uint); function gem() virtual public view returns (Gem); function join(address, uint) virtual public payable; function exit(address, uint) virtual public; } abstract contract Jug { struct Ilk { uint256 duty; uint256 rho; } mapping (bytes32 => Ilk) public ilks; function drip(bytes32) public virtual returns (uint); } abstract contract KyberNetworkProxyInterface { function maxGasPrice() external virtual view returns (uint256); function getUserCapInWei(address user) external virtual view returns (uint256); function getUserCapInTokenWei(address user, ERC20 token) external virtual view returns (uint256); function enabled() external virtual view returns (bool); function info(bytes32 id) external virtual view returns (uint256); function getExpectedRate(ERC20 src, ERC20 dest, uint256 srcQty) public virtual view returns (uint256 expectedRate, uint256 slippageRate); function tradeWithHint( ERC20 src, uint256 srcAmount, ERC20 dest, address destAddress, uint256 maxDestAmount, uint256 minConversionRate, address walletId, bytes memory hint ) public virtual payable returns (uint256); function trade( ERC20 src, uint256 srcAmount, ERC20 dest, address destAddress, uint256 maxDestAmount, uint256 minConversionRate, address walletId ) public virtual payable returns (uint256); function swapEtherToToken(ERC20 token, uint256 minConversionRate) external virtual payable returns (uint256); function swapTokenToEther(ERC20 token, uint256 tokenQty, uint256 minRate) external virtual payable returns (uint256); function swapTokenToToken(ERC20 src, uint256 srcAmount, ERC20 dest, uint256 minConversionRate) public virtual returns (uint256); } abstract contract Manager { function last(address) virtual public returns (uint); function cdpCan(address, uint, address) virtual public view returns (uint); function ilks(uint) virtual public view returns (bytes32); function owns(uint) virtual public view returns (address); function urns(uint) virtual public view returns (address); function vat() virtual public view returns (address); function open(bytes32, address) virtual public returns (uint); function give(uint, address) virtual public; function cdpAllow(uint, address, uint) virtual public; function urnAllow(address, uint) virtual public; function frob(uint, int, int) virtual public; function flux(uint, address, uint) virtual public; function move(uint, address, uint) virtual public; function exit(address, uint, address, uint) virtual public; function quit(uint, address) virtual public; function enter(address, uint) virtual public; function shift(uint, uint) virtual public; } abstract contract OasisInterface { function getBuyAmount(address tokenToBuy, address tokenToPay, uint256 amountToPay) external virtual view returns (uint256 amountBought); function getPayAmount(address tokenToPay, address tokenToBuy, uint256 amountToBuy) public virtual view returns (uint256 amountPaid); function sellAllAmount(address pay_gem, uint256 pay_amt, address buy_gem, uint256 min_fill_amount) public virtual returns (uint256 fill_amt); function buyAllAmount(address buy_gem, uint256 buy_amt, address pay_gem, uint256 max_fill_amount) public virtual returns (uint256 fill_amt); } abstract contract Osm { mapping(address => uint256) public bud; function peep() external view virtual returns (bytes32, bool); } abstract contract OsmMom { mapping (bytes32 => address) public osms; } abstract contract OtcInterface { function buyAllAmount(address, uint256, address, uint256) public virtual returns (uint256); function getPayAmount(address, address, uint256) public virtual view returns (uint256); function getBuyAmount(address, address, uint256) public virtual view returns (uint256); } abstract contract PipInterface { function read() public virtual returns (bytes32); } abstract contract ProxyRegistryInterface { function proxies(address _owner) public virtual view returns (address); function build(address) public virtual returns (address); } abstract contract SaverExchangeInterface { function getBestPrice( uint256 _amount, address _srcToken, address _destToken, uint256 _exchangeType ) public view virtual returns (address, uint256); } abstract contract Spotter { struct Ilk { PipInterface pip; uint256 mat; } mapping (bytes32 => Ilk) public ilks; uint256 public par; } abstract contract TokenInterface { function allowance(address, address) public virtual returns (uint256); function balanceOf(address) public virtual returns (uint256); function approve(address, uint256) public virtual; function transfer(address, uint256) public virtual returns (bool); function transferFrom(address, address, uint256) public virtual returns (bool); function deposit() public virtual payable; function withdraw(uint256) public virtual; } abstract contract UniswapExchangeInterface { function getEthToTokenInputPrice(uint256 eth_sold) external virtual view returns (uint256 tokens_bought); function getEthToTokenOutputPrice(uint256 tokens_bought) external virtual view returns (uint256 eth_sold); function getTokenToEthInputPrice(uint256 tokens_sold) external virtual view returns (uint256 eth_bought); function getTokenToEthOutputPrice(uint256 eth_bought) external virtual view returns (uint256 tokens_sold); function tokenToEthTransferInput( uint256 tokens_sold, uint256 min_eth, uint256 deadline, address recipient ) external virtual returns (uint256 eth_bought); function ethToTokenTransferInput(uint256 min_tokens, uint256 deadline, address recipient) external virtual payable returns (uint256 tokens_bought); function tokenToTokenTransferInput( uint256 tokens_sold, uint256 min_tokens_bought, uint256 min_eth_bought, uint256 deadline, address recipient, address token_addr ) external virtual returns (uint256 tokens_bought); function ethToTokenTransferOutput( uint256 tokens_bought, uint256 deadline, address recipient ) external virtual payable returns (uint256 eth_sold); function tokenToEthTransferOutput( uint256 eth_bought, uint256 max_tokens, uint256 deadline, address recipient ) external virtual returns (uint256 tokens_sold); function tokenToTokenTransferOutput( uint256 tokens_bought, uint256 max_tokens_sold, uint256 max_eth_sold, uint256 deadline, address recipient, address token_addr ) external virtual returns (uint256 tokens_sold); } abstract contract UniswapFactoryInterface { function getExchange(address token) external view virtual returns (address exchange); } abstract contract UniswapRouterInterface { function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline) external virtual returns (uint[] memory amounts); function swapExactTokensForTokens( uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline ) external virtual returns (uint[] memory amounts); function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline) external virtual returns (uint[] memory amounts); function swapTokensForExactTokens( uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline ) external virtual returns (uint[] memory amounts); function getAmountsOut(uint amountIn, address[] memory path) public virtual view returns (uint[] memory amounts); function getAmountsIn(uint amountOut, address[] memory path) public virtual view returns (uint[] memory amounts); } abstract contract Vat { struct Urn { uint256 ink; // Locked Collateral [wad] uint256 art; // Normalised Debt [wad] } struct Ilk { uint256 Art; // Total Normalised Debt [wad] uint256 rate; // Accumulated Rates [ray] uint256 spot; // Price with Safety Margin [ray] uint256 line; // Debt Ceiling [rad] uint256 dust; // Urn Debt Floor [rad] } mapping (bytes32 => mapping (address => Urn )) public urns; mapping (bytes32 => Ilk) public ilks; mapping (bytes32 => mapping (address => uint)) public gem; // [wad] function can(address, address) virtual public view returns (uint); function dai(address) virtual public view returns (uint); function frob(bytes32, address, address, address, int, int) virtual public; function hope(address) virtual public; function move(address, address, uint) virtual public; function fork(bytes32, address, address, int, int) virtual public; } contract DefisaverLogger { event LogEvent( address indexed contractAddress, address indexed caller, string indexed logName, bytes data ); // solhint-disable-next-line func-name-mixedcase function Log(address _contract, address _caller, string memory _logName, bytes memory _data) public { emit LogEvent(_contract, _caller, _logName, _data); } } contract MCDMonitorProxyV2 is AdminAuth { uint public CHANGE_PERIOD; address public monitor; address public newMonitor; address public lastMonitor; uint public changeRequestedTimestamp; mapping(address => bool) public allowed; event MonitorChangeInitiated(address oldMonitor, address newMonitor); event MonitorChangeCanceled(); event MonitorChangeFinished(address monitor); event MonitorChangeReverted(address monitor); // if someone who is allowed become malicious, owner can't be changed modifier onlyAllowed() { require(allowed[msg.sender] || msg.sender == owner); _; } modifier onlyMonitor() { require (msg.sender == monitor); _; } constructor(uint _changePeriod) public { CHANGE_PERIOD = _changePeriod * 1 days; } /// @notice Only monitor contract is able to call execute on users proxy /// @param _owner Address of cdp owner (users DSProxy address) /// @param _saverProxy Address of MCDSaverProxy /// @param _data Data to send to MCDSaverProxy function callExecute(address _owner, address _saverProxy, bytes memory _data) public payable onlyMonitor { // execute reverts if calling specific method fails DSProxyInterface(_owner).execute{value: msg.value}(_saverProxy, _data); // return if anything left if (address(this).balance > 0) { msg.sender.transfer(address(this).balance); } } /// @notice Allowed users are able to set Monitor contract without any waiting period first time /// @param _monitor Address of Monitor contract function setMonitor(address _monitor) public onlyAllowed { require(monitor == address(0)); monitor = _monitor; } /// @notice Allowed users are able to start procedure for changing monitor /// @dev after CHANGE_PERIOD needs to call confirmNewMonitor to actually make a change /// @param _newMonitor address of new monitor function changeMonitor(address _newMonitor) public onlyAllowed { require(changeRequestedTimestamp == 0); changeRequestedTimestamp = now; lastMonitor = monitor; newMonitor = _newMonitor; emit MonitorChangeInitiated(lastMonitor, newMonitor); } /// @notice At any point allowed users are able to cancel monitor change function cancelMonitorChange() public onlyAllowed { require(changeRequestedTimestamp > 0); changeRequestedTimestamp = 0; newMonitor = address(0); emit MonitorChangeCanceled(); } /// @notice Anyone is able to confirm new monitor after CHANGE_PERIOD if process is started function confirmNewMonitor() public onlyAllowed { require((changeRequestedTimestamp + CHANGE_PERIOD) < now); require(changeRequestedTimestamp != 0); require(newMonitor != address(0)); monitor = newMonitor; newMonitor = address(0); changeRequestedTimestamp = 0; emit MonitorChangeFinished(monitor); } /// @notice Its possible to revert monitor to last used monitor function revertMonitor() public onlyAllowed { require(lastMonitor != address(0)); monitor = lastMonitor; emit MonitorChangeReverted(monitor); } /// @notice Allowed users are able to add new allowed user /// @param _user Address of user that will be allowed function addAllowed(address _user) public onlyAllowed { allowed[_user] = true; } /// @notice Allowed users are able to remove allowed user /// @dev owner is always allowed even if someone tries to remove it from allowed mapping /// @param _user Address of allowed user function removeAllowed(address _user) public onlyAllowed { allowed[_user] = false; } function setChangePeriod(uint _periodInDays) public onlyAllowed { require(_periodInDays * 1 days > CHANGE_PERIOD); CHANGE_PERIOD = _periodInDays * 1 days; } } contract MCDPriceVerifier is AdminAuth { OsmMom public osmMom = OsmMom(0x76416A4d5190d071bfed309861527431304aA14f); Manager public manager = Manager(0x5ef30b9986345249bc32d8928B7ee64DE9435E39); mapping(address => bool) public authorized; function verifyVaultNextPrice(uint _nextPrice, uint _cdpId) public view returns(bool) { require(authorized[msg.sender]); bytes32 ilk = manager.ilks(_cdpId); return verifyNextPrice(_nextPrice, ilk); } function verifyNextPrice(uint _nextPrice, bytes32 _ilk) public view returns(bool) { require(authorized[msg.sender]); address osmAddress = osmMom.osms(_ilk); uint whitelisted = Osm(osmAddress).bud(address(this)); // If contracts doesn't have access return true if (whitelisted != 1) return true; (bytes32 price, bool has) = Osm(osmAddress).peep(); return has ? uint(price) == _nextPrice : false; } function setAuthorized(address _address, bool _allowed) public onlyOwner { authorized[_address] = _allowed; } } abstract contract StaticV2 { enum Method { Boost, Repay } struct CdpHolder { uint128 minRatio; uint128 maxRatio; uint128 optimalRatioBoost; uint128 optimalRatioRepay; address owner; uint cdpId; bool boostEnabled; bool nextPriceEnabled; } struct SubPosition { uint arrPos; bool subscribed; } } contract SubscriptionsInterfaceV2 { function subscribe(uint _cdpId, uint128 _minRatio, uint128 _maxRatio, uint128 _optimalBoost, uint128 _optimalRepay, bool _boostEnabled, bool _nextPriceEnabled) external {} function unsubscribe(uint _cdpId) external {} } contract SubscriptionsProxyV2 { address public constant MONITOR_PROXY_ADDRESS = 0x7456f4218874eAe1aF8B83a64848A1B89fEB7d7C; address public constant OLD_SUBSCRIPTION = 0x83152CAA0d344a2Fd428769529e2d490A88f4393; address public constant FACTORY_ADDRESS = 0x5a15566417e6C1c9546523066500bDDBc53F88C7; function migrate(uint _cdpId, uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled, bool _nextPriceEnabled, address _subscriptions) public { SubscriptionsInterfaceV2(OLD_SUBSCRIPTION).unsubscribe(_cdpId); subscribe(_cdpId, _minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled, _nextPriceEnabled, _subscriptions); } function subscribe(uint _cdpId, uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled, bool _nextPriceEnabled, address _subscriptions) public { address currAuthority = address(DSAuth(address(this)).authority()); DSGuard guard = DSGuard(currAuthority); if (currAuthority == address(0)) { guard = DSGuardFactory(FACTORY_ADDRESS).newGuard(); DSAuth(address(this)).setAuthority(DSAuthority(address(guard))); } guard.permit(MONITOR_PROXY_ADDRESS, address(this), bytes4(keccak256("execute(address,bytes)"))); SubscriptionsInterfaceV2(_subscriptions).subscribe(_cdpId, _minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled, _nextPriceEnabled); } function update(uint _cdpId, uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled, bool _nextPriceEnabled, address _subscriptions) public { SubscriptionsInterfaceV2(_subscriptions).subscribe(_cdpId, _minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled, _nextPriceEnabled); } function unsubscribe(uint _cdpId, address _subscriptions) public { SubscriptionsInterfaceV2(_subscriptions).unsubscribe(_cdpId); } } contract SubscriptionsV2 is AdminAuth, StaticV2 { bytes32 internal constant ETH_ILK = 0x4554482d41000000000000000000000000000000000000000000000000000000; bytes32 internal constant BAT_ILK = 0x4241542d41000000000000000000000000000000000000000000000000000000; address public constant MANAGER_ADDRESS = 0x5ef30b9986345249bc32d8928B7ee64DE9435E39; address public constant VAT_ADDRESS = 0x35D1b3F3D7966A1DFe207aa4514C12a259A0492B; address public constant SPOTTER_ADDRESS = 0x65C79fcB50Ca1594B025960e539eD7A9a6D434A3; CdpHolder[] public subscribers; mapping (uint => SubPosition) public subscribersPos; mapping (bytes32 => uint) public minLimits; uint public changeIndex; Manager public manager = Manager(MANAGER_ADDRESS); Vat public vat = Vat(VAT_ADDRESS); Spotter public spotter = Spotter(SPOTTER_ADDRESS); MCDSaverProxy public saverProxy; event Subscribed(address indexed owner, uint cdpId); event Unsubscribed(address indexed owner, uint cdpId); event Updated(address indexed owner, uint cdpId); event ParamUpdates(address indexed owner, uint cdpId, uint128, uint128, uint128, uint128, bool boostEnabled); /// @param _saverProxy Address of the MCDSaverProxy contract constructor(address _saverProxy) public { saverProxy = MCDSaverProxy(payable(_saverProxy)); minLimits[ETH_ILK] = 1700000000000000000; minLimits[BAT_ILK] = 1700000000000000000; } /// @dev Called by the DSProxy contract which owns the CDP /// @notice Adds the users CDP in the list of subscriptions so it can be monitored /// @param _cdpId Id of the CDP /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalBoost Ratio amount which boost should target /// @param _optimalRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled /// @param _nextPriceEnabled Boolean determing if we can use nextPrice for this cdp function subscribe(uint _cdpId, uint128 _minRatio, uint128 _maxRatio, uint128 _optimalBoost, uint128 _optimalRepay, bool _boostEnabled, bool _nextPriceEnabled) external { require(isOwner(msg.sender, _cdpId), "Must be called by Cdp owner"); // if boost is not enabled, set max ratio to max uint uint128 localMaxRatio = _boostEnabled ? _maxRatio : uint128(-1); require(checkParams(manager.ilks(_cdpId), _minRatio, localMaxRatio), "Must be correct params"); SubPosition storage subInfo = subscribersPos[_cdpId]; CdpHolder memory subscription = CdpHolder({ minRatio: _minRatio, maxRatio: localMaxRatio, optimalRatioBoost: _optimalBoost, optimalRatioRepay: _optimalRepay, owner: msg.sender, cdpId: _cdpId, boostEnabled: _boostEnabled, nextPriceEnabled: _nextPriceEnabled }); changeIndex++; if (subInfo.subscribed) { subscribers[subInfo.arrPos] = subscription; emit Updated(msg.sender, _cdpId); emit ParamUpdates(msg.sender, _cdpId, _minRatio, localMaxRatio, _optimalBoost, _optimalRepay, _boostEnabled); } else { subscribers.push(subscription); subInfo.arrPos = subscribers.length - 1; subInfo.subscribed = true; emit Subscribed(msg.sender, _cdpId); } } /// @notice Called by the users DSProxy /// @dev Owner who subscribed cancels his subscription function unsubscribe(uint _cdpId) external { require(isOwner(msg.sender, _cdpId), "Must be called by Cdp owner"); _unsubscribe(_cdpId); } /// @dev Checks if the _owner is the owner of the CDP function isOwner(address _owner, uint _cdpId) internal view returns (bool) { return getOwner(_cdpId) == _owner; } /// @dev Checks limit for minimum ratio and if minRatio is bigger than max function checkParams(bytes32 _ilk, uint128 _minRatio, uint128 _maxRatio) internal view returns (bool) { if (_minRatio < minLimits[_ilk]) { return false; } if (_minRatio > _maxRatio) { return false; } return true; } /// @dev Internal method to remove a subscriber from the list function _unsubscribe(uint _cdpId) internal { require(subscribers.length > 0, "Must have subscribers in the list"); SubPosition storage subInfo = subscribersPos[_cdpId]; require(subInfo.subscribed, "Must first be subscribed"); uint lastCdpId = subscribers[subscribers.length - 1].cdpId; SubPosition storage subInfo2 = subscribersPos[lastCdpId]; subInfo2.arrPos = subInfo.arrPos; subscribers[subInfo.arrPos] = subscribers[subscribers.length - 1]; subscribers.pop(); changeIndex++; subInfo.subscribed = false; subInfo.arrPos = 0; emit Unsubscribed(msg.sender, _cdpId); } /// @notice Returns an address that owns the CDP /// @param _cdpId Id of the CDP function getOwner(uint _cdpId) public view returns(address) { return manager.owns(_cdpId); } /// @notice Helper method for the front to get all the info about the subscribed CDP function getSubscribedInfo(uint _cdpId) public view returns(bool, uint128, uint128, uint128, uint128, address, uint coll, uint debt) { SubPosition memory subInfo = subscribersPos[_cdpId]; if (!subInfo.subscribed) return (false, 0, 0, 0, 0, address(0), 0, 0); (coll, debt) = saverProxy.getCdpInfo(manager, _cdpId, manager.ilks(_cdpId)); CdpHolder memory subscriber = subscribers[subInfo.arrPos]; return ( true, subscriber.minRatio, subscriber.maxRatio, subscriber.optimalRatioRepay, subscriber.optimalRatioBoost, subscriber.owner, coll, debt ); } function getCdpHolder(uint _cdpId) public view returns (bool subscribed, CdpHolder memory) { SubPosition memory subInfo = subscribersPos[_cdpId]; if (!subInfo.subscribed) return (false, CdpHolder(0, 0, 0, 0, address(0), 0, false, false)); CdpHolder memory subscriber = subscribers[subInfo.arrPos]; return (true, subscriber); } /// @notice Helper method for the front to get the information about the ilk of a CDP function getIlkInfo(bytes32 _ilk, uint _cdpId) public view returns(bytes32 ilk, uint art, uint rate, uint spot, uint line, uint dust, uint mat, uint par) { // send either ilk or cdpId if (_ilk == bytes32(0)) { _ilk = manager.ilks(_cdpId); } ilk = _ilk; (,mat) = spotter.ilks(_ilk); par = spotter.par(); (art, rate, spot, line, dust) = vat.ilks(_ilk); } /// @notice Helper method to return all the subscribed CDPs function getSubscribers() public view returns (CdpHolder[] memory) { return subscribers; } /// @notice Helper method to return all the subscribed CDPs function getSubscribersByPage(uint _page, uint _perPage) public view returns (CdpHolder[] memory) { CdpHolder[] memory holders = new CdpHolder[](_perPage); uint start = _page * _perPage; uint end = start + _perPage; uint count = 0; for (uint i=start; i<end; i++) { holders[count] = subscribers[i]; count++; } return holders; } ////////////// ADMIN METHODS /////////////////// /// @notice Admin function to change a min. limit for an asset function changeMinRatios(bytes32 _ilk, uint _newRatio) public onlyOwner { minLimits[_ilk] = _newRatio; } /// @notice Admin function to unsubscribe a CDP function unsubscribeByAdmin(uint _cdpId) public onlyOwner { SubPosition storage subInfo = subscribersPos[_cdpId]; if (subInfo.subscribed) { _unsubscribe(_cdpId); } } } contract BidProxy { address public constant DAI_JOIN = 0x9759A6Ac90977b93B58547b4A71c78317f391A28; address public constant VAT_ADDRESS = 0x35D1b3F3D7966A1DFe207aa4514C12a259A0492B; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; function daiBid(uint _bidId, uint _amount, address _flipper) public { uint tendAmount = _amount * (10 ** 27); joinDai(_amount); (, uint lot, , , , , , ) = Flipper(_flipper).bids(_bidId); Vat(VAT_ADDRESS).hope(_flipper); Flipper(_flipper).tend(_bidId, lot, tendAmount); } function collateralBid(uint _bidId, uint _amount, address _flipper) public { (uint bid, , , , , , , ) = Flipper(_flipper).bids(_bidId); joinDai(bid / (10**27)); Vat(VAT_ADDRESS).hope(_flipper); Flipper(_flipper).dent(_bidId, _amount, bid); } function closeBid(uint _bidId, address _flipper, address _joinAddr) public { bytes32 ilk = Join(_joinAddr).ilk(); Flipper(_flipper).deal(_bidId); uint amount = Vat(VAT_ADDRESS).gem(ilk, address(this)) / (10**27); Vat(VAT_ADDRESS).hope(_joinAddr); Gem(_joinAddr).exit(msg.sender, amount); } function exitCollateral(address _joinAddr) public { bytes32 ilk = Join(_joinAddr).ilk(); uint amount = Vat(VAT_ADDRESS).gem(ilk, address(this)) / (10**27); Vat(VAT_ADDRESS).hope(_joinAddr); Gem(_joinAddr).exit(msg.sender, amount); } function exitDai() public { uint amount = Vat(VAT_ADDRESS).dai(address(this)) / (10**27); Vat(VAT_ADDRESS).hope(DAI_JOIN); Gem(DAI_JOIN).exit(msg.sender, amount); } function withdrawToken(address _token) public { uint balance = ERC20(_token).balanceOf(address(this)); ERC20(_token).transfer(msg.sender, balance); } function withdrawEth() public { uint balance = address(this).balance; msg.sender.transfer(balance); } function joinDai(uint _amount) internal { uint amountInVat = Vat(VAT_ADDRESS).dai(address(this)) / (10**27); if (_amount > amountInVat) { uint amountDiff = (_amount - amountInVat) + 1; ERC20(DAI_ADDRESS).transferFrom(msg.sender, address(this), amountDiff); ERC20(DAI_ADDRESS).approve(DAI_JOIN, amountDiff); Join(DAI_JOIN).join(address(this), amountDiff); } } } abstract contract IMCDSubscriptions { function unsubscribe(uint256 _cdpId) external virtual ; function subscribersPos(uint256 _cdpId) external virtual returns (uint256, bool); } abstract contract GemLike { function approve(address, uint256) public virtual; function transfer(address, uint256) public virtual; function transferFrom(address, address, uint256) public virtual; function deposit() public virtual payable; function withdraw(uint256) public virtual; } abstract contract ManagerLike { function cdpCan(address, uint256, address) public virtual view returns (uint256); function ilks(uint256) public virtual view returns (bytes32); function owns(uint256) public virtual view returns (address); function urns(uint256) public virtual view returns (address); function vat() public virtual view returns (address); function open(bytes32, address) public virtual returns (uint256); function give(uint256, address) public virtual; function cdpAllow(uint256, address, uint256) public virtual; function urnAllow(address, uint256) public virtual; function frob(uint256, int256, int256) public virtual; function flux(uint256, address, uint256) public virtual; function move(uint256, address, uint256) public virtual; function exit(address, uint256, address, uint256) public virtual; function quit(uint256, address) public virtual; function enter(address, uint256) public virtual; function shift(uint256, uint256) public virtual; } abstract contract VatLike { function can(address, address) public virtual view returns (uint256); function ilks(bytes32) public virtual view returns (uint256, uint256, uint256, uint256, uint256); function dai(address) public virtual view returns (uint256); function urns(bytes32, address) public virtual view returns (uint256, uint256); function frob(bytes32, address, address, address, int256, int256) public virtual; function hope(address) public virtual; function move(address, address, uint256) public virtual; } abstract contract GemJoinLike { function dec() public virtual returns (uint256); function gem() public virtual returns (GemLike); function join(address, uint256) public virtual payable; function exit(address, uint256) public virtual; } abstract contract GNTJoinLike { function bags(address) public virtual view returns (address); function make(address) public virtual returns (address); } abstract contract DaiJoinLike { function vat() public virtual returns (VatLike); function dai() public virtual returns (GemLike); function join(address, uint256) public virtual payable; function exit(address, uint256) public virtual; } abstract contract HopeLike { function hope(address) public virtual; function nope(address) public virtual; } abstract contract ProxyRegistryInterface { function build(address) public virtual returns (address); } abstract contract EndLike { function fix(bytes32) public virtual view returns (uint256); function cash(bytes32, uint256) public virtual; function free(bytes32) public virtual; function pack(uint256) public virtual; function skim(bytes32, address) public virtual; } abstract contract JugLike { function drip(bytes32) public virtual returns (uint256); } abstract contract PotLike { function pie(address) public virtual view returns (uint256); function drip() public virtual returns (uint256); function join(uint256) public virtual; function exit(uint256) public virtual; } abstract contract ProxyRegistryLike { function proxies(address) public virtual view returns (address); function build(address) public virtual returns (address); } abstract contract ProxyLike { function owner() public virtual view returns (address); } contract Common { uint256 constant RAY = 10**27; // Internal functions function mul(uint256 x, uint256 y) internal pure returns (uint256 z) { require(y == 0 || (z = x * y) / y == x, "mul-overflow"); } // Public functions // solhint-disable-next-line func-name-mixedcase function daiJoin_join(address apt, address urn, uint256 wad) public { // Gets DAI from the user's wallet DaiJoinLike(apt).dai().transferFrom(msg.sender, address(this), wad); // Approves adapter to take the DAI amount DaiJoinLike(apt).dai().approve(apt, wad); // Joins DAI into the vat DaiJoinLike(apt).join(urn, wad); } } contract MCDCreateProxyActions is Common { // Internal functions function sub(uint256 x, uint256 y) internal pure returns (uint256 z) { require((z = x - y) <= x, "sub-overflow"); } function toInt(uint256 x) internal pure returns (int256 y) { y = int256(x); require(y >= 0, "int-overflow"); } function toRad(uint256 wad) internal pure returns (uint256 rad) { rad = mul(wad, 10**27); } function convertTo18(address gemJoin, uint256 amt) internal returns (uint256 wad) { // For those collaterals that have less than 18 decimals precision we need to do the conversion before passing to frob function // Adapters will automatically handle the difference of precision wad = mul(amt, 10**(18 - GemJoinLike(gemJoin).dec())); } function _getDrawDart(address vat, address jug, address urn, bytes32 ilk, uint256 wad) internal returns (int256 dart) { // Updates stability fee rate uint256 rate = JugLike(jug).drip(ilk); // Gets DAI balance of the urn in the vat uint256 dai = VatLike(vat).dai(urn); // If there was already enough DAI in the vat balance, just exits it without adding more debt if (dai < mul(wad, RAY)) { // Calculates the needed dart so together with the existing dai in the vat is enough to exit wad amount of DAI tokens dart = toInt(sub(mul(wad, RAY), dai) / rate); // This is neeeded due lack of precision. It might need to sum an extra dart wei (for the given DAI wad amount) dart = mul(uint256(dart), rate) < mul(wad, RAY) ? dart + 1 : dart; } } function _getWipeDart(address vat, uint256 dai, address urn, bytes32 ilk) internal view returns (int256 dart) { // Gets actual rate from the vat (, uint256 rate, , , ) = VatLike(vat).ilks(ilk); // Gets actual art value of the urn (, uint256 art) = VatLike(vat).urns(ilk, urn); // Uses the whole dai balance in the vat to reduce the debt dart = toInt(dai / rate); // Checks the calculated dart is not higher than urn.art (total debt), otherwise uses its value dart = uint256(dart) <= art ? -dart : -toInt(art); } function _getWipeAllWad(address vat, address usr, address urn, bytes32 ilk) internal view returns (uint256 wad) { // Gets actual rate from the vat (, uint256 rate, , , ) = VatLike(vat).ilks(ilk); // Gets actual art value of the urn (, uint256 art) = VatLike(vat).urns(ilk, urn); // Gets actual dai amount in the urn uint256 dai = VatLike(vat).dai(usr); uint256 rad = sub(mul(art, rate), dai); wad = rad / RAY; // If the rad precision has some dust, it will need to request for 1 extra wad wei wad = mul(wad, RAY) < rad ? wad + 1 : wad; } // Public functions function transfer(address gem, address dst, uint256 wad) public { GemLike(gem).transfer(dst, wad); } // solhint-disable-next-line func-name-mixedcase function ethJoin_join(address apt, address urn) public payable { // Wraps ETH in WETH GemJoinLike(apt).gem().deposit{value: msg.value}(); // Approves adapter to take the WETH amount GemJoinLike(apt).gem().approve(address(apt), msg.value); // Joins WETH collateral into the vat GemJoinLike(apt).join(urn, msg.value); } // solhint-disable-next-line func-name-mixedcase function gemJoin_join(address apt, address urn, uint256 wad, bool transferFrom) public { // Only executes for tokens that have approval/transferFrom implementation if (transferFrom) { // Gets token from the user's wallet GemJoinLike(apt).gem().transferFrom(msg.sender, address(this), wad); // Approves adapter to take the token amount GemJoinLike(apt).gem().approve(apt, 0); GemJoinLike(apt).gem().approve(apt, wad); } // Joins token collateral into the vat GemJoinLike(apt).join(urn, wad); } function hope(address obj, address usr) public { HopeLike(obj).hope(usr); } function nope(address obj, address usr) public { HopeLike(obj).nope(usr); } function open(address manager, bytes32 ilk, address usr) public returns (uint256 cdp) { cdp = ManagerLike(manager).open(ilk, usr); } function give(address manager, uint256 cdp, address usr) public { ManagerLike(manager).give(cdp, usr); } function move(address manager, uint256 cdp, address dst, uint256 rad) public { ManagerLike(manager).move(cdp, dst, rad); } function frob(address manager, uint256 cdp, int256 dink, int256 dart) public { ManagerLike(manager).frob(cdp, dink, dart); } function lockETH(address manager, address ethJoin, uint256 cdp) public payable { // Receives ETH amount, converts it to WETH and joins it into the vat ethJoin_join(ethJoin, address(this)); // Locks WETH amount into the CDP VatLike(ManagerLike(manager).vat()).frob( ManagerLike(manager).ilks(cdp), ManagerLike(manager).urns(cdp), address(this), address(this), toInt(msg.value), 0 ); } function lockGem(address manager, address gemJoin, uint256 cdp, uint256 wad, bool transferFrom) public { // Takes token amount from user's wallet and joins into the vat gemJoin_join(gemJoin, address(this), wad, transferFrom); // Locks token amount into the CDP VatLike(ManagerLike(manager).vat()).frob( ManagerLike(manager).ilks(cdp), ManagerLike(manager).urns(cdp), address(this), address(this), toInt(convertTo18(gemJoin, wad)), 0 ); } function draw(address manager, address jug, address daiJoin, uint256 cdp, uint256 wad) public { address urn = ManagerLike(manager).urns(cdp); address vat = ManagerLike(manager).vat(); bytes32 ilk = ManagerLike(manager).ilks(cdp); // Generates debt in the CDP frob(manager, cdp, 0, _getDrawDart(vat, jug, urn, ilk, wad)); // Moves the DAI amount (balance in the vat in rad) to proxy's address move(manager, cdp, address(this), toRad(wad)); // Allows adapter to access to proxy's DAI balance in the vat if (VatLike(vat).can(address(this), address(daiJoin)) == 0) { VatLike(vat).hope(daiJoin); } // Exits DAI to the user's wallet as a token DaiJoinLike(daiJoin).exit(msg.sender, wad); } function lockETHAndDraw( address manager, address jug, address ethJoin, address daiJoin, uint256 cdp, uint256 wadD ) public payable { address urn = ManagerLike(manager).urns(cdp); address vat = ManagerLike(manager).vat(); bytes32 ilk = ManagerLike(manager).ilks(cdp); // Receives ETH amount, converts it to WETH and joins it into the vat ethJoin_join(ethJoin, urn); // Locks WETH amount into the CDP and generates debt frob(manager, cdp, toInt(msg.value), _getDrawDart(vat, jug, urn, ilk, wadD)); // Moves the DAI amount (balance in the vat in rad) to proxy's address move(manager, cdp, address(this), toRad(wadD)); // Allows adapter to access to proxy's DAI balance in the vat if (VatLike(vat).can(address(this), address(daiJoin)) == 0) { VatLike(vat).hope(daiJoin); } // Exits DAI to the user's wallet as a token DaiJoinLike(daiJoin).exit(msg.sender, wadD); } function openLockETHAndDraw( address manager, address jug, address ethJoin, address daiJoin, bytes32 ilk, uint256 wadD, address owner ) public payable returns (uint256 cdp) { cdp = open(manager, ilk, address(this)); lockETHAndDraw(manager, jug, ethJoin, daiJoin, cdp, wadD); give(manager, cdp, owner); } function lockGemAndDraw( address manager, address jug, address gemJoin, address daiJoin, uint256 cdp, uint256 wadC, uint256 wadD, bool transferFrom ) public { address urn = ManagerLike(manager).urns(cdp); address vat = ManagerLike(manager).vat(); bytes32 ilk = ManagerLike(manager).ilks(cdp); // Takes token amount from user's wallet and joins into the vat gemJoin_join(gemJoin, urn, wadC, transferFrom); // Locks token amount into the CDP and generates debt frob( manager, cdp, toInt(convertTo18(gemJoin, wadC)), _getDrawDart(vat, jug, urn, ilk, wadD) ); // Moves the DAI amount (balance in the vat in rad) to proxy's address move(manager, cdp, address(this), toRad(wadD)); // Allows adapter to access to proxy's DAI balance in the vat if (VatLike(vat).can(address(this), address(daiJoin)) == 0) { VatLike(vat).hope(daiJoin); } // Exits DAI to the user's wallet as a token DaiJoinLike(daiJoin).exit(msg.sender, wadD); } function openLockGemAndDraw( address manager, address jug, address gemJoin, address daiJoin, bytes32 ilk, uint256 wadC, uint256 wadD, bool transferFrom, address owner ) public returns (uint256 cdp) { cdp = open(manager, ilk, address(this)); lockGemAndDraw(manager, jug, gemJoin, daiJoin, cdp, wadC, wadD, transferFrom); give(manager, cdp, owner); } } contract MCDCreateTaker { using SafeERC20 for ERC20; address payable public constant MCD_CREATE_FLASH_LOAN = 0x71eC9a4fCE561c3936a511D9ebb05B60CF2bA519; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; address public constant ETH_JOIN_ADDRESS = 0x2F0b23f53734252Bda2277357e97e1517d6B042A; ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); // solhint-disable-next-line const-name-snakecase Manager public constant manager = Manager(0x5ef30b9986345249bc32d8928B7ee64DE9435E39); // solhint-disable-next-line const-name-snakecase DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); struct CreateData { uint collAmount; uint daiAmount; address joinAddr; } function openWithLoan( SaverExchangeCore.ExchangeData memory _exchangeData, CreateData memory _createData ) public payable { MCD_CREATE_FLASH_LOAN.transfer(msg.value); //0x fee if (_createData.joinAddr != ETH_JOIN_ADDRESS) { ERC20(getCollateralAddr(_createData.joinAddr)).safeTransferFrom(msg.sender, address(this), _createData.collAmount); ERC20(getCollateralAddr(_createData.joinAddr)).safeTransfer(MCD_CREATE_FLASH_LOAN, _createData.collAmount); } (uint[6] memory numData, address[5] memory addrData, bytes memory callData) = _packData(_createData, _exchangeData); bytes memory paramsData = abi.encode(numData, addrData, callData, address(this)); lendingPool.flashLoan(MCD_CREATE_FLASH_LOAN, DAI_ADDRESS, _createData.daiAmount, paramsData); logger.Log(address(this), msg.sender, "MCDCreate", abi.encode(manager.last(address(this)), _createData.collAmount, _createData.daiAmount)); } function getCollateralAddr(address _joinAddr) internal view returns (address) { return address(Join(_joinAddr).gem()); } function _packData( CreateData memory _createData, SaverExchangeCore.ExchangeData memory exchangeData ) internal pure returns (uint[6] memory numData, address[5] memory addrData, bytes memory callData) { numData = [ _createData.collAmount, _createData.daiAmount, exchangeData.srcAmount, exchangeData.destAmount, exchangeData.minPrice, exchangeData.price0x ]; addrData = [ exchangeData.srcAddr, exchangeData.destAddr, exchangeData.exchangeAddr, exchangeData.wrapper, _createData.joinAddr ]; callData = exchangeData.callData; } } abstract contract GemLike { function approve(address, uint) virtual public; function transfer(address, uint) virtual public; function transferFrom(address, address, uint) virtual public; function deposit() virtual public payable; function withdraw(uint) virtual public; } abstract contract ManagerLike { function cdpCan(address, uint, address) virtual public view returns (uint); function ilks(uint) virtual public view returns (bytes32); function owns(uint) virtual public view returns (address); function urns(uint) virtual public view returns (address); function vat() virtual public view returns (address); function open(bytes32, address) virtual public returns (uint); function give(uint, address) virtual public; function cdpAllow(uint, address, uint) virtual public; function urnAllow(address, uint) virtual public; function frob(uint, int, int) virtual public; function flux(uint, address, uint) virtual public; function move(uint, address, uint) virtual public; function exit(address, uint, address, uint) virtual public; function quit(uint, address) virtual public; function enter(address, uint) virtual public; function shift(uint, uint) virtual public; } abstract contract VatLike { function can(address, address) virtual public view returns (uint); function ilks(bytes32) virtual public view returns (uint, uint, uint, uint, uint); function dai(address) virtual public view returns (uint); function urns(bytes32, address) virtual public view returns (uint, uint); function frob(bytes32, address, address, address, int, int) virtual public; function hope(address) virtual public; function move(address, address, uint) virtual public; } abstract contract GemJoinLike { function dec() virtual public returns (uint); function gem() virtual public returns (GemLike); function join(address, uint) virtual public payable; function exit(address, uint) virtual public; } abstract contract GNTJoinLike { function bags(address) virtual public view returns (address); function make(address) virtual public returns (address); } abstract contract DaiJoinLike { function vat() virtual public returns (VatLike); function dai() virtual public returns (GemLike); function join(address, uint) virtual public payable; function exit(address, uint) virtual public; } abstract contract HopeLike { function hope(address) virtual public; function nope(address) virtual public; } abstract contract ProxyRegistryInterface { function proxies(address _owner) virtual public view returns (address); function build(address) virtual public returns (address); } abstract contract EndLike { function fix(bytes32) virtual public view returns (uint); function cash(bytes32, uint) virtual public; function free(bytes32) virtual public; function pack(uint) virtual public; function skim(bytes32, address) virtual public; } abstract contract JugLike { function drip(bytes32) virtual public returns (uint); } abstract contract PotLike { function pie(address) virtual public view returns (uint); function drip() virtual public returns (uint); function join(uint) virtual public; function exit(uint) virtual public; } abstract contract ProxyRegistryLike { function proxies(address) virtual public view returns (address); function build(address) virtual public returns (address); } abstract contract ProxyLike { function owner() virtual public view returns (address); } abstract contract DSProxy { function execute(address _target, bytes memory _data) virtual public payable returns (bytes32); function setOwner(address owner_) virtual public; } contract Common { uint256 constant RAY = 10 ** 27; // Internal functions function mul(uint x, uint y) internal pure returns (uint z) { require(y == 0 || (z = x * y) / y == x, "mul-overflow"); } // Public functions function daiJoin_join(address apt, address urn, uint wad) public { // Gets DAI from the user's wallet DaiJoinLike(apt).dai().transferFrom(msg.sender, address(this), wad); // Approves adapter to take the DAI amount DaiJoinLike(apt).dai().approve(apt, wad); // Joins DAI into the vat DaiJoinLike(apt).join(urn, wad); } } contract SaverProxyActions is Common { event CDPAction(string indexed, uint indexed, uint, uint); // Internal functions function sub(uint x, uint y) internal pure returns (uint z) { require((z = x - y) <= x, "sub-overflow"); } function toInt(uint x) internal pure returns (int y) { y = int(x); require(y >= 0, "int-overflow"); } function toRad(uint wad) internal pure returns (uint rad) { rad = mul(wad, 10 ** 27); } function convertTo18(address gemJoin, uint256 amt) internal returns (uint256 wad) { // For those collaterals that have less than 18 decimals precision we need to do the conversion before passing to frob function // Adapters will automatically handle the difference of precision wad = mul( amt, 10 ** (18 - GemJoinLike(gemJoin).dec()) ); } function _getDrawDart( address vat, address jug, address urn, bytes32 ilk, uint wad ) internal returns (int dart) { // Updates stability fee rate uint rate = JugLike(jug).drip(ilk); // Gets DAI balance of the urn in the vat uint dai = VatLike(vat).dai(urn); // If there was already enough DAI in the vat balance, just exits it without adding more debt if (dai < mul(wad, RAY)) { // Calculates the needed dart so together with the existing dai in the vat is enough to exit wad amount of DAI tokens dart = toInt(sub(mul(wad, RAY), dai) / rate); // This is neeeded due lack of precision. It might need to sum an extra dart wei (for the given DAI wad amount) dart = mul(uint(dart), rate) < mul(wad, RAY) ? dart + 1 : dart; } } function _getWipeDart( address vat, uint dai, address urn, bytes32 ilk ) internal view returns (int dart) { // Gets actual rate from the vat (, uint rate,,,) = VatLike(vat).ilks(ilk); // Gets actual art value of the urn (, uint art) = VatLike(vat).urns(ilk, urn); // Uses the whole dai balance in the vat to reduce the debt dart = toInt(dai / rate); // Checks the calculated dart is not higher than urn.art (total debt), otherwise uses its value dart = uint(dart) <= art ? - dart : - toInt(art); } function _getWipeAllWad( address vat, address usr, address urn, bytes32 ilk ) internal view returns (uint wad) { // Gets actual rate from the vat (, uint rate,,,) = VatLike(vat).ilks(ilk); // Gets actual art value of the urn (, uint art) = VatLike(vat).urns(ilk, urn); // Gets actual dai amount in the urn uint dai = VatLike(vat).dai(usr); uint rad = sub(mul(art, rate), dai); wad = rad / RAY; // If the rad precision has some dust, it will need to request for 1 extra wad wei wad = mul(wad, RAY) < rad ? wad + 1 : wad; } // Public functions function transfer(address gem, address dst, uint wad) public { GemLike(gem).transfer(dst, wad); } function ethJoin_join(address apt, address urn) public payable { // Wraps ETH in WETH GemJoinLike(apt).gem().deposit{value: msg.value}(); // Approves adapter to take the WETH amount GemJoinLike(apt).gem().approve(address(apt), msg.value); // Joins WETH collateral into the vat GemJoinLike(apt).join(urn, msg.value); } function gemJoin_join(address apt, address urn, uint wad, bool transferFrom) public { // Only executes for tokens that have approval/transferFrom implementation if (transferFrom) { // Gets token from the user's wallet GemJoinLike(apt).gem().transferFrom(msg.sender, address(this), wad); // Approves adapter to take the token amount GemJoinLike(apt).gem().approve(apt, 0); GemJoinLike(apt).gem().approve(apt, wad); } // Joins token collateral into the vat GemJoinLike(apt).join(urn, wad); } function hope( address obj, address usr ) public { HopeLike(obj).hope(usr); } function nope( address obj, address usr ) public { HopeLike(obj).nope(usr); } function open( address manager, bytes32 ilk, address usr ) public returns (uint cdp) { cdp = ManagerLike(manager).open(ilk, usr); } function give( address manager, uint cdp, address usr ) public { ManagerLike(manager).give(cdp, usr); emit CDPAction('give', cdp, 0, 0); } function giveToProxy( address proxyRegistry, address manager, uint cdp, address dst ) public { // Gets actual proxy address address proxy = ProxyRegistryLike(proxyRegistry).proxies(dst); // Checks if the proxy address already existed and dst address is still the owner if (proxy == address(0) || ProxyLike(proxy).owner() != dst) { uint csize; assembly { csize := extcodesize(dst) } // We want to avoid creating a proxy for a contract address that might not be able to handle proxies, then losing the CDP require(csize == 0, "Dst-is-a-contract"); // Creates the proxy for the dst address proxy = ProxyRegistryLike(proxyRegistry).build(dst); } // Transfers CDP to the dst proxy give(manager, cdp, proxy); } function cdpAllow( address manager, uint cdp, address usr, uint ok ) public { ManagerLike(manager).cdpAllow(cdp, usr, ok); } function urnAllow( address manager, address usr, uint ok ) public { ManagerLike(manager).urnAllow(usr, ok); } function flux( address manager, uint cdp, address dst, uint wad ) public { ManagerLike(manager).flux(cdp, dst, wad); } function move( address manager, uint cdp, address dst, uint rad ) public { ManagerLike(manager).move(cdp, dst, rad); } function frob( address manager, uint cdp, int dink, int dart ) public { ManagerLike(manager).frob(cdp, dink, dart); } function quit( address manager, uint cdp, address dst ) public { ManagerLike(manager).quit(cdp, dst); } function enter( address manager, address src, uint cdp ) public { ManagerLike(manager).enter(src, cdp); } function shift( address manager, uint cdpSrc, uint cdpOrg ) public { ManagerLike(manager).shift(cdpSrc, cdpOrg); } function makeGemBag( address gemJoin ) public returns (address bag) { bag = GNTJoinLike(gemJoin).make(address(this)); } function lockETH( address manager, address ethJoin, uint cdp ) public payable { // Receives ETH amount, converts it to WETH and joins it into the vat ethJoin_join(ethJoin, address(this)); // Locks WETH amount into the CDP VatLike(ManagerLike(manager).vat()).frob( ManagerLike(manager).ilks(cdp), ManagerLike(manager).urns(cdp), address(this), address(this), toInt(msg.value), 0 ); emit CDPAction('lockETH', cdp, msg.value, 0); } function lockGem( address manager, address gemJoin, uint cdp, uint wad, bool transferFrom ) public { // Takes token amount from user's wallet and joins into the vat gemJoin_join(gemJoin, address(this), wad, transferFrom); // Locks token amount into the CDP VatLike(ManagerLike(manager).vat()).frob( ManagerLike(manager).ilks(cdp), ManagerLike(manager).urns(cdp), address(this), address(this), toInt(convertTo18(gemJoin, wad)), 0 ); emit CDPAction('lockGem', cdp, wad, 0); } function freeETH( address manager, address ethJoin, uint cdp, uint wad ) public { // Unlocks WETH amount from the CDP frob(manager, cdp, -toInt(wad), 0); // Moves the amount from the CDP urn to proxy's address flux(manager, cdp, address(this), wad); // Exits WETH amount to proxy address as a token GemJoinLike(ethJoin).exit(address(this), wad); // Converts WETH to ETH GemJoinLike(ethJoin).gem().withdraw(wad); // Sends ETH back to the user's wallet msg.sender.transfer(wad); emit CDPAction('freeETH', cdp, wad, 0); } function freeGem( address manager, address gemJoin, uint cdp, uint wad ) public { uint wad18 = convertTo18(gemJoin, wad); // Unlocks token amount from the CDP frob(manager, cdp, -toInt(wad18), 0); // Moves the amount from the CDP urn to proxy's address flux(manager, cdp, address(this), wad18); // Exits token amount to the user's wallet as a token GemJoinLike(gemJoin).exit(msg.sender, wad); emit CDPAction('freeGem', cdp, wad, 0); } function exitETH( address manager, address ethJoin, uint cdp, uint wad ) public { // Moves the amount from the CDP urn to proxy's address flux(manager, cdp, address(this), wad); // Exits WETH amount to proxy address as a token GemJoinLike(ethJoin).exit(address(this), wad); // Converts WETH to ETH GemJoinLike(ethJoin).gem().withdraw(wad); // Sends ETH back to the user's wallet msg.sender.transfer(wad); } function exitGem( address manager, address gemJoin, uint cdp, uint wad ) public { // Moves the amount from the CDP urn to proxy's address flux(manager, cdp, address(this), convertTo18(gemJoin, wad)); // Exits token amount to the user's wallet as a token GemJoinLike(gemJoin).exit(msg.sender, wad); } function draw( address manager, address jug, address daiJoin, uint cdp, uint wad ) public { address urn = ManagerLike(manager).urns(cdp); address vat = ManagerLike(manager).vat(); bytes32 ilk = ManagerLike(manager).ilks(cdp); // Generates debt in the CDP frob(manager, cdp, 0, _getDrawDart(vat, jug, urn, ilk, wad)); // Moves the DAI amount (balance in the vat in rad) to proxy's address move(manager, cdp, address(this), toRad(wad)); // Allows adapter to access to proxy's DAI balance in the vat if (VatLike(vat).can(address(this), address(daiJoin)) == 0) { VatLike(vat).hope(daiJoin); } // Exits DAI to the user's wallet as a token DaiJoinLike(daiJoin).exit(msg.sender, wad); emit CDPAction('draw', cdp, 0, wad); } function wipe( address manager, address daiJoin, uint cdp, uint wad ) public { address vat = ManagerLike(manager).vat(); address urn = ManagerLike(manager).urns(cdp); bytes32 ilk = ManagerLike(manager).ilks(cdp); address own = ManagerLike(manager).owns(cdp); if (own == address(this) || ManagerLike(manager).cdpCan(own, cdp, address(this)) == 1) { // Joins DAI amount into the vat daiJoin_join(daiJoin, urn, wad); // Paybacks debt to the CDP frob(manager, cdp, 0, _getWipeDart(vat, VatLike(vat).dai(urn), urn, ilk)); } else { // Joins DAI amount into the vat daiJoin_join(daiJoin, address(this), wad); // Paybacks debt to the CDP VatLike(vat).frob( ilk, urn, address(this), address(this), 0, _getWipeDart(vat, wad * RAY, urn, ilk) ); } emit CDPAction('wipe', cdp, 0, wad); } function wipeAll( address manager, address daiJoin, uint cdp ) public { address vat = ManagerLike(manager).vat(); address urn = ManagerLike(manager).urns(cdp); bytes32 ilk = ManagerLike(manager).ilks(cdp); (, uint art) = VatLike(vat).urns(ilk, urn); address own = ManagerLike(manager).owns(cdp); if (own == address(this) || ManagerLike(manager).cdpCan(own, cdp, address(this)) == 1) { // Joins DAI amount into the vat daiJoin_join(daiJoin, urn, _getWipeAllWad(vat, urn, urn, ilk)); // Paybacks debt to the CDP frob(manager, cdp, 0, -int(art)); } else { // Joins DAI amount into the vat daiJoin_join(daiJoin, address(this), _getWipeAllWad(vat, address(this), urn, ilk)); // Paybacks debt to the CDP VatLike(vat).frob( ilk, urn, address(this), address(this), 0, -int(art) ); } emit CDPAction('wipeAll', cdp, 0, art); } function lockETHAndDraw( address manager, address jug, address ethJoin, address daiJoin, uint cdp, uint wadD ) public payable { address urn = ManagerLike(manager).urns(cdp); address vat = ManagerLike(manager).vat(); bytes32 ilk = ManagerLike(manager).ilks(cdp); // Receives ETH amount, converts it to WETH and joins it into the vat ethJoin_join(ethJoin, urn); // Locks WETH amount into the CDP and generates debt frob(manager, cdp, toInt(msg.value), _getDrawDart(vat, jug, urn, ilk, wadD)); // Moves the DAI amount (balance in the vat in rad) to proxy's address move(manager, cdp, address(this), toRad(wadD)); // Allows adapter to access to proxy's DAI balance in the vat if (VatLike(vat).can(address(this), address(daiJoin)) == 0) { VatLike(vat).hope(daiJoin); } // Exits DAI to the user's wallet as a token DaiJoinLike(daiJoin).exit(msg.sender, wadD); } function openLockETHAndDraw( address manager, address jug, address ethJoin, address daiJoin, bytes32 ilk, uint wadD ) public payable returns (uint cdp) { cdp = open(manager, ilk, address(this)); lockETHAndDraw(manager, jug, ethJoin, daiJoin, cdp, wadD); emit CDPAction('openLockETHAndDraw', cdp, msg.value, wadD); } function lockGemAndDraw( address manager, address jug, address gemJoin, address daiJoin, uint cdp, uint wadC, uint wadD, bool transferFrom ) public { address urn = ManagerLike(manager).urns(cdp); address vat = ManagerLike(manager).vat(); bytes32 ilk = ManagerLike(manager).ilks(cdp); // Takes token amount from user's wallet and joins into the vat gemJoin_join(gemJoin, urn, wadC, transferFrom); // Locks token amount into the CDP and generates debt frob(manager, cdp, toInt(convertTo18(gemJoin, wadC)), _getDrawDart(vat, jug, urn, ilk, wadD)); // Moves the DAI amount (balance in the vat in rad) to proxy's address move(manager, cdp, address(this), toRad(wadD)); // Allows adapter to access to proxy's DAI balance in the vat if (VatLike(vat).can(address(this), address(daiJoin)) == 0) { VatLike(vat).hope(daiJoin); } // Exits DAI to the user's wallet as a token DaiJoinLike(daiJoin).exit(msg.sender, wadD); } function openLockGemAndDraw( address manager, address jug, address gemJoin, address daiJoin, bytes32 ilk, uint wadC, uint wadD, bool transferFrom ) public returns (uint cdp) { cdp = open(manager, ilk, address(this)); lockGemAndDraw(manager, jug, gemJoin, daiJoin, cdp, wadC, wadD, transferFrom); emit CDPAction('openLockGemAndDraw', cdp, wadC, wadD); } function wipeAllAndFreeETH( address manager, address ethJoin, address daiJoin, uint cdp, uint wadC ) public { address vat = ManagerLike(manager).vat(); address urn = ManagerLike(manager).urns(cdp); bytes32 ilk = ManagerLike(manager).ilks(cdp); (, uint art) = VatLike(vat).urns(ilk, urn); // Joins DAI amount into the vat daiJoin_join(daiJoin, urn, _getWipeAllWad(vat, urn, urn, ilk)); // Paybacks debt to the CDP and unlocks WETH amount from it frob( manager, cdp, -toInt(wadC), -int(art) ); // Moves the amount from the CDP urn to proxy's address flux(manager, cdp, address(this), wadC); // Exits WETH amount to proxy address as a token GemJoinLike(ethJoin).exit(address(this), wadC); // Converts WETH to ETH GemJoinLike(ethJoin).gem().withdraw(wadC); // Sends ETH back to the user's wallet msg.sender.transfer(wadC); emit CDPAction('wipeAllAndFreeETH', cdp, wadC, art); } function wipeAndFreeGem( address manager, address gemJoin, address daiJoin, uint cdp, uint wadC, uint wadD ) public { address urn = ManagerLike(manager).urns(cdp); // Joins DAI amount into the vat daiJoin_join(daiJoin, urn, wadD); uint wad18 = convertTo18(gemJoin, wadC); // Paybacks debt to the CDP and unlocks token amount from it frob( manager, cdp, -toInt(wad18), _getWipeDart(ManagerLike(manager).vat(), VatLike(ManagerLike(manager).vat()).dai(urn), urn, ManagerLike(manager).ilks(cdp)) ); // Moves the amount from the CDP urn to proxy's address flux(manager, cdp, address(this), wad18); // Exits token amount to the user's wallet as a token GemJoinLike(gemJoin).exit(msg.sender, wadC); } function wipeAllAndFreeGem( address manager, address gemJoin, address daiJoin, uint cdp, uint wadC ) public { address vat = ManagerLike(manager).vat(); address urn = ManagerLike(manager).urns(cdp); bytes32 ilk = ManagerLike(manager).ilks(cdp); (, uint art) = VatLike(vat).urns(ilk, urn); // Joins DAI amount into the vat daiJoin_join(daiJoin, urn, _getWipeAllWad(vat, urn, urn, ilk)); uint wad18 = convertTo18(gemJoin, wadC); // Paybacks debt to the CDP and unlocks token amount from it frob( manager, cdp, -toInt(wad18), -int(art) ); // Moves the amount from the CDP urn to proxy's address flux(manager, cdp, address(this), wad18); // Exits token amount to the user's wallet as a token GemJoinLike(gemJoin).exit(msg.sender, wadC); emit CDPAction('wipeAllAndFreeGem', cdp, wadC, art); } function createProxyAndCDP( address manager, address jug, address ethJoin, address daiJoin, bytes32 ilk, uint wadD, address registry ) public payable returns(uint) { address proxy = ProxyRegistryInterface(registry).build(msg.sender); uint cdp = openLockETHAndDraw(manager, jug, ethJoin, daiJoin, ilk, wadD ); give(manager, cdp, address(proxy)); return cdp; } function createProxyAndGemCDP( address manager, address jug, address gemJoin, address daiJoin, bytes32 ilk, uint wadC, uint wadD, bool transferFrom, address registry ) public returns(uint) { address proxy = ProxyRegistryInterface(registry).build(msg.sender); uint cdp = openLockGemAndDraw(manager, jug, gemJoin, daiJoin, ilk, wadC, wadD, transferFrom); give(manager, cdp, address(proxy)); return cdp; } } contract MCDSaverProxyHelper is DSMath { /// @notice Returns a normalized debt _amount based on the current rate /// @param _amount Amount of dai to be normalized /// @param _rate Current rate of the stability fee /// @param _daiVatBalance Balance od Dai in the Vat for that CDP function normalizeDrawAmount(uint _amount, uint _rate, uint _daiVatBalance) internal pure returns (int dart) { if (_daiVatBalance < mul(_amount, RAY)) { dart = toPositiveInt(sub(mul(_amount, RAY), _daiVatBalance) / _rate); dart = mul(uint(dart), _rate) < mul(_amount, RAY) ? dart + 1 : dart; } } /// @notice Converts a number to Rad percision /// @param _wad The input number in wad percision function toRad(uint _wad) internal pure returns (uint) { return mul(_wad, 10 ** 27); } /// @notice Converts a number to 18 decimal percision /// @param _joinAddr Join address of the collateral /// @param _amount Number to be converted function convertTo18(address _joinAddr, uint256 _amount) internal view returns (uint256) { return mul(_amount, 10 ** (18 - Join(_joinAddr).dec())); } /// @notice Converts a uint to int and checks if positive /// @param _x Number to be converted function toPositiveInt(uint _x) internal pure returns (int y) { y = int(_x); require(y >= 0, "int-overflow"); } /// @notice Gets Dai amount in Vat which can be added to Cdp /// @param _vat Address of Vat contract /// @param _urn Urn of the Cdp /// @param _ilk Ilk of the Cdp function normalizePaybackAmount(address _vat, address _urn, bytes32 _ilk) internal view returns (int amount) { uint dai = Vat(_vat).dai(_urn); (, uint rate,,,) = Vat(_vat).ilks(_ilk); (, uint art) = Vat(_vat).urns(_ilk, _urn); amount = toPositiveInt(dai / rate); amount = uint(amount) <= art ? - amount : - toPositiveInt(art); } /// @notice Gets the whole debt of the CDP /// @param _vat Address of Vat contract /// @param _usr Address of the Dai holder /// @param _urn Urn of the Cdp /// @param _ilk Ilk of the Cdp function getAllDebt(address _vat, address _usr, address _urn, bytes32 _ilk) internal view returns (uint daiAmount) { (, uint rate,,,) = Vat(_vat).ilks(_ilk); (, uint art) = Vat(_vat).urns(_ilk, _urn); uint dai = Vat(_vat).dai(_usr); uint rad = sub(mul(art, rate), dai); daiAmount = rad / RAY; daiAmount = mul(daiAmount, RAY) < rad ? daiAmount + 1 : daiAmount; } /// @notice Gets the token address from the Join contract /// @param _joinAddr Address of the Join contract function getCollateralAddr(address _joinAddr) internal view returns (address) { return address(Join(_joinAddr).gem()); } /// @notice Gets CDP info (collateral, debt) /// @param _manager Manager contract /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP function getCdpInfo(Manager _manager, uint _cdpId, bytes32 _ilk) public view returns (uint, uint) { address vat = _manager.vat(); address urn = _manager.urns(_cdpId); (uint collateral, uint debt) = Vat(vat).urns(_ilk, urn); (,uint rate,,,) = Vat(vat).ilks(_ilk); return (collateral, rmul(debt, rate)); } /// @notice Address that owns the DSProxy that owns the CDP /// @param _manager Manager contract /// @param _cdpId Id of the CDP function getOwner(Manager _manager, uint _cdpId) public view returns (address) { DSProxy proxy = DSProxy(uint160(_manager.owns(_cdpId))); return proxy.owner(); } } abstract contract ILendingPool { function flashLoan( address payable _receiver, address _reserve, uint _amount, bytes calldata _params) external virtual; } abstract contract ProtocolInterface { function deposit(address _user, uint256 _amount) public virtual; function withdraw(address _user, uint256 _amount) public virtual; } contract SavingsLogger { event Deposit(address indexed sender, uint8 protocol, uint256 amount); event Withdraw(address indexed sender, uint8 protocol, uint256 amount); event Swap(address indexed sender, uint8 fromProtocol, uint8 toProtocol, uint256 amount); function logDeposit(address _sender, uint8 _protocol, uint256 _amount) external { emit Deposit(_sender, _protocol, _amount); } function logWithdraw(address _sender, uint8 _protocol, uint256 _amount) external { emit Withdraw(_sender, _protocol, _amount); } function logSwap(address _sender, uint8 _protocolFrom, uint8 _protocolTo, uint256 _amount) external { emit Swap(_sender, _protocolFrom, _protocolTo, _amount); } } contract AaveSavingsProtocol is ProtocolInterface, DSAuth { address public constant ADAI_ADDRESS = 0xfC1E690f61EFd961294b3e1Ce3313fBD8aa4f85d; address public constant AAVE_LENDING_POOL = 0x398eC7346DcD622eDc5ae82352F02bE94C62d119; address public constant AAVE_LENDING_POOL_CORE = 0x3dfd23A6c5E8BbcFc9581d2E864a68feb6a076d3; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; function deposit(address _user, uint _amount) public override { require(msg.sender == _user); // get dai from user require(ERC20(DAI_ADDRESS).transferFrom(_user, address(this), _amount)); ERC20(DAI_ADDRESS).approve(AAVE_LENDING_POOL_CORE, uint(-1)); ILendingPool(AAVE_LENDING_POOL).deposit(DAI_ADDRESS, _amount, 0); ERC20(ADAI_ADDRESS).transfer(_user, ERC20(ADAI_ADDRESS).balanceOf(address(this))); } function withdraw(address _user, uint _amount) public override { require(msg.sender == _user); require(ERC20(ADAI_ADDRESS).transferFrom(_user, address(this), _amount)); IAToken(ADAI_ADDRESS).redeem(_amount); // return dai we have to user ERC20(DAI_ADDRESS).transfer(_user, _amount); } } contract CompoundSavingsProtocol { address public constant NEW_CDAI_ADDRESS = 0x5d3a536E4D6DbD6114cc1Ead35777bAB948E3643; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; CTokenInterface public constant cDaiContract = CTokenInterface(NEW_CDAI_ADDRESS); function compDeposit(address _user, uint _amount) internal { // get dai from user require(ERC20(DAI_ADDRESS).transferFrom(_user, address(this), _amount)); // mainnet only ERC20(DAI_ADDRESS).approve(NEW_CDAI_ADDRESS, uint(-1)); // mint cDai require(cDaiContract.mint(_amount) == 0, "Failed Mint"); } function compWithdraw(address _user, uint _amount) internal { // transfer all users balance to this contract require(cDaiContract.transferFrom(_user, address(this), ERC20(NEW_CDAI_ADDRESS).balanceOf(_user))); // approve cDai to compound contract cDaiContract.approve(NEW_CDAI_ADDRESS, uint(-1)); // get dai from cDai contract require(cDaiContract.redeemUnderlying(_amount) == 0, "Reedem Failed"); // return to user balance we didn't spend uint cDaiBalance = cDaiContract.balanceOf(address(this)); if (cDaiBalance > 0) { cDaiContract.transfer(_user, cDaiBalance); } // return dai we have to user ERC20(DAI_ADDRESS).transfer(_user, _amount); } } abstract contract VatLike { function can(address, address) virtual public view returns (uint); function ilks(bytes32) virtual public view returns (uint, uint, uint, uint, uint); function dai(address) virtual public view returns (uint); function urns(bytes32, address) virtual public view returns (uint, uint); function frob(bytes32, address, address, address, int, int) virtual public; function hope(address) virtual public; function move(address, address, uint) virtual public; } abstract contract PotLike { function pie(address) virtual public view returns (uint); function drip() virtual public returns (uint); function join(uint) virtual public; function exit(uint) virtual public; } abstract contract GemLike { function approve(address, uint) virtual public; function transfer(address, uint) virtual public; function transferFrom(address, address, uint) virtual public; function deposit() virtual public payable; function withdraw(uint) virtual public; } abstract contract DaiJoinLike { function vat() virtual public returns (VatLike); function dai() virtual public returns (GemLike); function join(address, uint) virtual public payable; function exit(address, uint) virtual public; } contract DSRSavingsProtocol is DSMath { // Mainnet address public constant POT_ADDRESS = 0x197E90f9FAD81970bA7976f33CbD77088E5D7cf7; address public constant DAI_JOIN_ADDRESS = 0x9759A6Ac90977b93B58547b4A71c78317f391A28; function dsrDeposit(uint _amount, bool _fromUser) internal { VatLike vat = DaiJoinLike(DAI_JOIN_ADDRESS).vat(); uint chi = PotLike(POT_ADDRESS).drip(); daiJoin_join(DAI_JOIN_ADDRESS, address(this), _amount, _fromUser); if (vat.can(address(this), address(POT_ADDRESS)) == 0) { vat.hope(POT_ADDRESS); } PotLike(POT_ADDRESS).join(mul(_amount, RAY) / chi); } function dsrWithdraw(uint _amount, bool _toUser) internal { VatLike vat = DaiJoinLike(DAI_JOIN_ADDRESS).vat(); uint chi = PotLike(POT_ADDRESS).drip(); uint pie = mul(_amount, RAY) / chi; PotLike(POT_ADDRESS).exit(pie); uint balance = DaiJoinLike(DAI_JOIN_ADDRESS).vat().dai(address(this)); if (vat.can(address(this), address(DAI_JOIN_ADDRESS)) == 0) { vat.hope(DAI_JOIN_ADDRESS); } address to; if (_toUser) { to = msg.sender; } else { to = address(this); } if (_amount == uint(-1)) { DaiJoinLike(DAI_JOIN_ADDRESS).exit(to, mul(chi, pie) / RAY); } else { DaiJoinLike(DAI_JOIN_ADDRESS).exit( to, balance >= mul(_amount, RAY) ? _amount : balance / RAY ); } } function daiJoin_join(address apt, address urn, uint wad, bool _fromUser) internal { if (_fromUser) { DaiJoinLike(apt).dai().transferFrom(msg.sender, address(this), wad); } DaiJoinLike(apt).dai().approve(apt, wad); DaiJoinLike(apt).join(urn, wad); } } contract DydxSavingsProtocol is ProtocolInterface, DSAuth { address public constant SOLO_MARGIN_ADDRESS = 0x1E0447b19BB6EcFdAe1e4AE1694b0C3659614e4e; ISoloMargin public soloMargin; address public savingsProxy; uint daiMarketId = 3; constructor() public { soloMargin = ISoloMargin(SOLO_MARGIN_ADDRESS); } function addSavingsProxy(address _savingsProxy) public auth { savingsProxy = _savingsProxy; } function deposit(address _user, uint _amount) public override { require(msg.sender == _user); Account.Info[] memory accounts = new Account.Info[](1); accounts[0] = getAccount(_user, 0); Actions.ActionArgs[] memory actions = new Actions.ActionArgs[](1); Types.AssetAmount memory amount = Types.AssetAmount({ sign: true, denomination: Types.AssetDenomination.Wei, ref: Types.AssetReference.Delta, value: _amount }); actions[0] = Actions.ActionArgs({ actionType: Actions.ActionType.Deposit, accountId: 0, amount: amount, primaryMarketId: daiMarketId, otherAddress: _user, secondaryMarketId: 0, //not used otherAccountId: 0, //not used data: "" //not used }); soloMargin.operate(accounts, actions); } function withdraw(address _user, uint _amount) public override { require(msg.sender == _user); Account.Info[] memory accounts = new Account.Info[](1); accounts[0] = getAccount(_user, 0); Actions.ActionArgs[] memory actions = new Actions.ActionArgs[](1); Types.AssetAmount memory amount = Types.AssetAmount({ sign: false, denomination: Types.AssetDenomination.Wei, ref: Types.AssetReference.Delta, value: _amount }); actions[0] = Actions.ActionArgs({ actionType: Actions.ActionType.Withdraw, accountId: 0, amount: amount, primaryMarketId: daiMarketId, otherAddress: _user, secondaryMarketId: 0, //not used otherAccountId: 0, //not used data: "" //not used }); soloMargin.operate(accounts, actions); } function getWeiBalance(address _user, uint _index) public view returns(Types.Wei memory) { Types.Wei[] memory weiBalances; (,,weiBalances) = soloMargin.getAccountBalances(getAccount(_user, _index)); return weiBalances[daiMarketId]; } function getParBalance(address _user, uint _index) public view returns(Types.Par memory) { Types.Par[] memory parBalances; (,parBalances,) = soloMargin.getAccountBalances(getAccount(_user, _index)); return parBalances[daiMarketId]; } function getAccount(address _user, uint _index) public pure returns(Account.Info memory) { Account.Info memory account = Account.Info({ owner: _user, number: _index }); return account; } } abstract contract ISoloMargin { struct OperatorArg { address operator; bool trusted; } function operate( Account.Info[] memory accounts, Actions.ActionArgs[] memory actions ) public virtual; function getAccountBalances( Account.Info memory account ) public view virtual returns ( address[] memory, Types.Par[] memory, Types.Wei[] memory ); function setOperators( OperatorArg[] memory args ) public virtual; function getNumMarkets() public view virtual returns (uint256); function getMarketTokenAddress(uint256 marketId) public view virtual returns (address); } library Account { // ============ Enums ============ /* * Most-recently-cached account status. * * Normal: Can only be liquidated if the account values are violating the global margin-ratio. * Liquid: Can be liquidated no matter the account values. * Can be vaporized if there are no more positive account values. * Vapor: Has only negative (or zeroed) account values. Can be vaporized. * */ enum Status { Normal, Liquid, Vapor } // ============ Structs ============ // Represents the unique key that specifies an account struct Info { address owner; // The address that owns the account uint256 number; // A nonce that allows a single address to control many accounts } // The complete storage for any account struct Storage { mapping (uint256 => Types.Par) balances; // Mapping from marketId to principal Status status; } // ============ Library Functions ============ function equals( Info memory a, Info memory b ) internal pure returns (bool) { return a.owner == b.owner && a.number == b.number; } } library Actions { // ============ Constants ============ bytes32 constant FILE = "Actions"; // ============ Enums ============ enum ActionType { Deposit, // supply tokens Withdraw, // borrow tokens Transfer, // transfer balance between accounts Buy, // buy an amount of some token (externally) Sell, // sell an amount of some token (externally) Trade, // trade tokens against another account Liquidate, // liquidate an undercollateralized or expiring account Vaporize, // use excess tokens to zero-out a completely negative account Call // send arbitrary data to an address } enum AccountLayout { OnePrimary, TwoPrimary, PrimaryAndSecondary } enum MarketLayout { ZeroMarkets, OneMarket, TwoMarkets } // ============ Structs ============ /* * Arguments that are passed to Solo in an ordered list as part of a single operation. * Each ActionArgs has an actionType which specifies which action struct that this data will be * parsed into before being processed. */ struct ActionArgs { ActionType actionType; uint256 accountId; Types.AssetAmount amount; uint256 primaryMarketId; uint256 secondaryMarketId; address otherAddress; uint256 otherAccountId; bytes data; } // ============ Action Types ============ /* * Moves tokens from an address to Solo. Can either repay a borrow or provide additional supply. */ struct DepositArgs { Types.AssetAmount amount; Account.Info account; uint256 market; address from; } /* * Moves tokens from Solo to another address. Can either borrow tokens or reduce the amount * previously supplied. */ struct WithdrawArgs { Types.AssetAmount amount; Account.Info account; uint256 market; address to; } /* * Transfers balance between two accounts. The msg.sender must be an operator for both accounts. * The amount field applies to accountOne. * This action does not require any token movement since the trade is done internally to Solo. */ struct TransferArgs { Types.AssetAmount amount; Account.Info accountOne; Account.Info accountTwo; uint256 market; } /* * Acquires a certain amount of tokens by spending other tokens. Sends takerMarket tokens to the * specified exchangeWrapper contract and expects makerMarket tokens in return. The amount field * applies to the makerMarket. */ struct BuyArgs { Types.AssetAmount amount; Account.Info account; uint256 makerMarket; uint256 takerMarket; address exchangeWrapper; bytes orderData; } /* * Spends a certain amount of tokens to acquire other tokens. Sends takerMarket tokens to the * specified exchangeWrapper and expects makerMarket tokens in return. The amount field applies * to the takerMarket. */ struct SellArgs { Types.AssetAmount amount; Account.Info account; uint256 takerMarket; uint256 makerMarket; address exchangeWrapper; bytes orderData; } /* * Trades balances between two accounts using any external contract that implements the * AutoTrader interface. The AutoTrader contract must be an operator for the makerAccount (for * which it is trading on-behalf-of). The amount field applies to the makerAccount and the * inputMarket. This proposed change to the makerAccount is passed to the AutoTrader which will * quote a change for the makerAccount in the outputMarket (or will disallow the trade). * This action does not require any token movement since the trade is done internally to Solo. */ struct TradeArgs { Types.AssetAmount amount; Account.Info takerAccount; Account.Info makerAccount; uint256 inputMarket; uint256 outputMarket; address autoTrader; bytes tradeData; } /* * Each account must maintain a certain margin-ratio (specified globally). If the account falls * below this margin-ratio, it can be liquidated by any other account. This allows anyone else * (arbitrageurs) to repay any borrowed asset (owedMarket) of the liquidating account in * exchange for any collateral asset (heldMarket) of the liquidAccount. The ratio is determined * by the price ratio (given by the oracles) plus a spread (specified globally). Liquidating an * account also sets a flag on the account that the account is being liquidated. This allows * anyone to continue liquidating the account until there are no more borrows being taken by the * liquidating account. Liquidators do not have to liquidate the entire account all at once but * can liquidate as much as they choose. The liquidating flag allows liquidators to continue * liquidating the account even if it becomes collateralized through partial liquidation or * price movement. */ struct LiquidateArgs { Types.AssetAmount amount; Account.Info solidAccount; Account.Info liquidAccount; uint256 owedMarket; uint256 heldMarket; } /* * Similar to liquidate, but vaporAccounts are accounts that have only negative balances * remaining. The arbitrageur pays back the negative asset (owedMarket) of the vaporAccount in * exchange for a collateral asset (heldMarket) at a favorable spread. However, since the * liquidAccount has no collateral assets, the collateral must come from Solo's excess tokens. */ struct VaporizeArgs { Types.AssetAmount amount; Account.Info solidAccount; Account.Info vaporAccount; uint256 owedMarket; uint256 heldMarket; } /* * Passes arbitrary bytes of data to an external contract that implements the Callee interface. * Does not change any asset amounts. This function may be useful for setting certain variables * on layer-two contracts for certain accounts without having to make a separate Ethereum * transaction for doing so. Also, the second-layer contracts can ensure that the call is coming * from an operator of the particular account. */ struct CallArgs { Account.Info account; address callee; bytes data; } // ============ Helper Functions ============ function getMarketLayout( ActionType actionType ) internal pure returns (MarketLayout) { if ( actionType == Actions.ActionType.Deposit || actionType == Actions.ActionType.Withdraw || actionType == Actions.ActionType.Transfer ) { return MarketLayout.OneMarket; } else if (actionType == Actions.ActionType.Call) { return MarketLayout.ZeroMarkets; } return MarketLayout.TwoMarkets; } function getAccountLayout( ActionType actionType ) internal pure returns (AccountLayout) { if ( actionType == Actions.ActionType.Transfer || actionType == Actions.ActionType.Trade ) { return AccountLayout.TwoPrimary; } else if ( actionType == Actions.ActionType.Liquidate || actionType == Actions.ActionType.Vaporize ) { return AccountLayout.PrimaryAndSecondary; } return AccountLayout.OnePrimary; } // ============ Parsing Functions ============ function parseDepositArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (DepositArgs memory) { assert(args.actionType == ActionType.Deposit); return DepositArgs({ amount: args.amount, account: accounts[args.accountId], market: args.primaryMarketId, from: args.otherAddress }); } function parseWithdrawArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (WithdrawArgs memory) { assert(args.actionType == ActionType.Withdraw); return WithdrawArgs({ amount: args.amount, account: accounts[args.accountId], market: args.primaryMarketId, to: args.otherAddress }); } function parseTransferArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (TransferArgs memory) { assert(args.actionType == ActionType.Transfer); return TransferArgs({ amount: args.amount, accountOne: accounts[args.accountId], accountTwo: accounts[args.otherAccountId], market: args.primaryMarketId }); } function parseBuyArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (BuyArgs memory) { assert(args.actionType == ActionType.Buy); return BuyArgs({ amount: args.amount, account: accounts[args.accountId], makerMarket: args.primaryMarketId, takerMarket: args.secondaryMarketId, exchangeWrapper: args.otherAddress, orderData: args.data }); } function parseSellArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (SellArgs memory) { assert(args.actionType == ActionType.Sell); return SellArgs({ amount: args.amount, account: accounts[args.accountId], takerMarket: args.primaryMarketId, makerMarket: args.secondaryMarketId, exchangeWrapper: args.otherAddress, orderData: args.data }); } function parseTradeArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (TradeArgs memory) { assert(args.actionType == ActionType.Trade); return TradeArgs({ amount: args.amount, takerAccount: accounts[args.accountId], makerAccount: accounts[args.otherAccountId], inputMarket: args.primaryMarketId, outputMarket: args.secondaryMarketId, autoTrader: args.otherAddress, tradeData: args.data }); } function parseLiquidateArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (LiquidateArgs memory) { assert(args.actionType == ActionType.Liquidate); return LiquidateArgs({ amount: args.amount, solidAccount: accounts[args.accountId], liquidAccount: accounts[args.otherAccountId], owedMarket: args.primaryMarketId, heldMarket: args.secondaryMarketId }); } function parseVaporizeArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (VaporizeArgs memory) { assert(args.actionType == ActionType.Vaporize); return VaporizeArgs({ amount: args.amount, solidAccount: accounts[args.accountId], vaporAccount: accounts[args.otherAccountId], owedMarket: args.primaryMarketId, heldMarket: args.secondaryMarketId }); } function parseCallArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (CallArgs memory) { assert(args.actionType == ActionType.Call); return CallArgs({ account: accounts[args.accountId], callee: args.otherAddress, data: args.data }); } } library Math { using SafeMath for uint256; // ============ Constants ============ bytes32 constant FILE = "Math"; // ============ Library Functions ============ /* * Return target * (numerator / denominator). */ function getPartial( uint256 target, uint256 numerator, uint256 denominator ) internal pure returns (uint256) { return target.mul(numerator).div(denominator); } /* * Return target * (numerator / denominator), but rounded up. */ function getPartialRoundUp( uint256 target, uint256 numerator, uint256 denominator ) internal pure returns (uint256) { if (target == 0 || numerator == 0) { // SafeMath will check for zero denominator return SafeMath.div(0, denominator); } return target.mul(numerator).sub(1).div(denominator).add(1); } function to128( uint256 number ) internal pure returns (uint128) { uint128 result = uint128(number); Require.that( result == number, FILE, "Unsafe cast to uint128" ); return result; } function to96( uint256 number ) internal pure returns (uint96) { uint96 result = uint96(number); Require.that( result == number, FILE, "Unsafe cast to uint96" ); return result; } function to32( uint256 number ) internal pure returns (uint32) { uint32 result = uint32(number); Require.that( result == number, FILE, "Unsafe cast to uint32" ); return result; } function min( uint256 a, uint256 b ) internal pure returns (uint256) { return a < b ? a : b; } function max( uint256 a, uint256 b ) internal pure returns (uint256) { return a > b ? a : b; } } library Require { // ============ Constants ============ uint256 constant ASCII_ZERO = 48; // '0' uint256 constant ASCII_RELATIVE_ZERO = 87; // 'a' - 10 uint256 constant ASCII_LOWER_EX = 120; // 'x' bytes2 constant COLON = 0x3a20; // ': ' bytes2 constant COMMA = 0x2c20; // ', ' bytes2 constant LPAREN = 0x203c; // ' <' byte constant RPAREN = 0x3e; // '>' uint256 constant FOUR_BIT_MASK = 0xf; // ============ Library Functions ============ function that( bool must, bytes32 file, bytes32 reason ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason) ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, uint256 payloadA ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), RPAREN ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, uint256 payloadA, uint256 payloadB ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), COMMA, stringify(payloadB), RPAREN ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, address payloadA ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), RPAREN ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, address payloadA, uint256 payloadB ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), COMMA, stringify(payloadB), RPAREN ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, address payloadA, uint256 payloadB, uint256 payloadC ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), COMMA, stringify(payloadB), COMMA, stringify(payloadC), RPAREN ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, bytes32 payloadA ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), RPAREN ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, bytes32 payloadA, uint256 payloadB, uint256 payloadC ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), COMMA, stringify(payloadB), COMMA, stringify(payloadC), RPAREN ) ) ); } } // ============ Private Functions ============ function stringifyTruncated( bytes32 input ) private pure returns (bytes memory) { // put the input bytes into the result bytes memory result = abi.encodePacked(input); // determine the length of the input by finding the location of the last non-zero byte for (uint256 i = 32; i > 0; ) { // reverse-for-loops with unsigned integer /* solium-disable-next-line security/no-modify-for-iter-var */ i--; // find the last non-zero byte in order to determine the length if (result[i] != 0) { uint256 length = i + 1; /* solium-disable-next-line security/no-inline-assembly */ assembly { mstore(result, length) // r.length = length; } return result; } } // all bytes are zero return new bytes(0); } function stringify( uint256 input ) private pure returns (bytes memory) { if (input == 0) { return "0"; } // get the final string length uint256 j = input; uint256 length; while (j != 0) { length++; j /= 10; } // allocate the string bytes memory bstr = new bytes(length); // populate the string starting with the least-significant character j = input; for (uint256 i = length; i > 0; ) { // reverse-for-loops with unsigned integer /* solium-disable-next-line security/no-modify-for-iter-var */ i--; // take last decimal digit bstr[i] = byte(uint8(ASCII_ZERO + (j % 10))); // remove the last decimal digit j /= 10; } return bstr; } function stringify( address input ) private pure returns (bytes memory) { uint256 z = uint256(input); // addresses are "0x" followed by 20 bytes of data which take up 2 characters each bytes memory result = new bytes(42); // populate the result with "0x" result[0] = byte(uint8(ASCII_ZERO)); result[1] = byte(uint8(ASCII_LOWER_EX)); // for each byte (starting from the lowest byte), populate the result with two characters for (uint256 i = 0; i < 20; i++) { // each byte takes two characters uint256 shift = i * 2; // populate the least-significant character result[41 - shift] = char(z & FOUR_BIT_MASK); z = z >> 4; // populate the most-significant character result[40 - shift] = char(z & FOUR_BIT_MASK); z = z >> 4; } return result; } function stringify( bytes32 input ) private pure returns (bytes memory) { uint256 z = uint256(input); // bytes32 are "0x" followed by 32 bytes of data which take up 2 characters each bytes memory result = new bytes(66); // populate the result with "0x" result[0] = byte(uint8(ASCII_ZERO)); result[1] = byte(uint8(ASCII_LOWER_EX)); // for each byte (starting from the lowest byte), populate the result with two characters for (uint256 i = 0; i < 32; i++) { // each byte takes two characters uint256 shift = i * 2; // populate the least-significant character result[65 - shift] = char(z & FOUR_BIT_MASK); z = z >> 4; // populate the most-significant character result[64 - shift] = char(z & FOUR_BIT_MASK); z = z >> 4; } return result; } function char( uint256 input ) private pure returns (byte) { // return ASCII digit (0-9) if (input < 10) { return byte(uint8(input + ASCII_ZERO)); } // return ASCII letter (a-f) return byte(uint8(input + ASCII_RELATIVE_ZERO)); } } library Types { using Math for uint256; // ============ AssetAmount ============ enum AssetDenomination { Wei, // the amount is denominated in wei Par // the amount is denominated in par } enum AssetReference { Delta, // the amount is given as a delta from the current value Target // the amount is given as an exact number to end up at } struct AssetAmount { bool sign; // true if positive AssetDenomination denomination; AssetReference ref; uint256 value; } // ============ Par (Principal Amount) ============ // Total borrow and supply values for a market struct TotalPar { uint128 borrow; uint128 supply; } // Individual principal amount for an account struct Par { bool sign; // true if positive uint128 value; } function zeroPar() internal pure returns (Par memory) { return Par({ sign: false, value: 0 }); } function sub( Par memory a, Par memory b ) internal pure returns (Par memory) { return add(a, negative(b)); } function add( Par memory a, Par memory b ) internal pure returns (Par memory) { Par memory result; if (a.sign == b.sign) { result.sign = a.sign; result.value = SafeMath.add(a.value, b.value).to128(); } else { if (a.value >= b.value) { result.sign = a.sign; result.value = SafeMath.sub(a.value, b.value).to128(); } else { result.sign = b.sign; result.value = SafeMath.sub(b.value, a.value).to128(); } } return result; } function equals( Par memory a, Par memory b ) internal pure returns (bool) { if (a.value == b.value) { if (a.value == 0) { return true; } return a.sign == b.sign; } return false; } function negative( Par memory a ) internal pure returns (Par memory) { return Par({ sign: !a.sign, value: a.value }); } function isNegative( Par memory a ) internal pure returns (bool) { return !a.sign && a.value > 0; } function isPositive( Par memory a ) internal pure returns (bool) { return a.sign && a.value > 0; } function isZero( Par memory a ) internal pure returns (bool) { return a.value == 0; } // ============ Wei (Token Amount) ============ // Individual token amount for an account struct Wei { bool sign; // true if positive uint256 value; } function zeroWei() internal pure returns (Wei memory) { return Wei({ sign: false, value: 0 }); } function sub( Wei memory a, Wei memory b ) internal pure returns (Wei memory) { return add(a, negative(b)); } function add( Wei memory a, Wei memory b ) internal pure returns (Wei memory) { Wei memory result; if (a.sign == b.sign) { result.sign = a.sign; result.value = SafeMath.add(a.value, b.value); } else { if (a.value >= b.value) { result.sign = a.sign; result.value = SafeMath.sub(a.value, b.value); } else { result.sign = b.sign; result.value = SafeMath.sub(b.value, a.value); } } return result; } function equals( Wei memory a, Wei memory b ) internal pure returns (bool) { if (a.value == b.value) { if (a.value == 0) { return true; } return a.sign == b.sign; } return false; } function negative( Wei memory a ) internal pure returns (Wei memory) { return Wei({ sign: !a.sign, value: a.value }); } function isNegative( Wei memory a ) internal pure returns (bool) { return !a.sign && a.value > 0; } function isPositive( Wei memory a ) internal pure returns (bool) { return a.sign && a.value > 0; } function isZero( Wei memory a ) internal pure returns (bool) { return a.value == 0; } } contract FulcrumSavingsProtocol is ProtocolInterface, DSAuth { address public constant NEW_IDAI_ADDRESS = 0x493C57C4763932315A328269E1ADaD09653B9081; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; address public savingsProxy; uint public decimals = 10 ** 18; function addSavingsProxy(address _savingsProxy) public auth { savingsProxy = _savingsProxy; } function deposit(address _user, uint _amount) public override { require(msg.sender == _user); // get dai from user require(ERC20(DAI_ADDRESS).transferFrom(_user, address(this), _amount)); // approve dai to Fulcrum ERC20(DAI_ADDRESS).approve(NEW_IDAI_ADDRESS, uint(-1)); // mint iDai ITokenInterface(NEW_IDAI_ADDRESS).mint(_user, _amount); } function withdraw(address _user, uint _amount) public override { require(msg.sender == _user); // transfer all users tokens to our contract require(ERC20(NEW_IDAI_ADDRESS).transferFrom(_user, address(this), ITokenInterface(NEW_IDAI_ADDRESS).balanceOf(_user))); // approve iDai to that contract ERC20(NEW_IDAI_ADDRESS).approve(NEW_IDAI_ADDRESS, uint(-1)); uint tokenPrice = ITokenInterface(NEW_IDAI_ADDRESS).tokenPrice(); // get dai from iDai contract ITokenInterface(NEW_IDAI_ADDRESS).burn(_user, _amount * decimals / tokenPrice); // return all remaining tokens back to user require(ERC20(NEW_IDAI_ADDRESS).transfer(_user, ITokenInterface(NEW_IDAI_ADDRESS).balanceOf(address(this)))); } } contract LoanShifterTaker is AdminAuth, ProxyPermission { ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; address public constant MANAGER_ADDRESS = 0x5ef30b9986345249bc32d8928B7ee64DE9435E39; Manager public constant manager = Manager(MANAGER_ADDRESS); ShifterRegistry public constant shifterRegistry = ShifterRegistry(0x2612Af3A521c2df9EAF28422Ca335b04AdF3ac66); enum Protocols { MCD, COMPOUND } enum SwapType { NO_SWAP, COLL_SWAP, DEBT_SWAP } struct LoanShiftData { Protocols fromProtocol; Protocols toProtocol; SwapType swapType; bool wholeDebt; uint collAmount; uint debtAmount; address debtAddr1; address debtAddr2; address addrLoan1; address addrLoan2; uint id1; uint id2; } /// @notice Main entry point, it will move or transform a loan /// @dev Called through DSProxy function moveLoan( SaverExchangeCore.ExchangeData memory _exchangeData, LoanShiftData memory _loanShift ) public { if (_isSameTypeVaults(_loanShift)) { _forkVault(_loanShift); return; } _callCloseAndOpen(_exchangeData, _loanShift); } //////////////////////// INTERNAL FUNCTIONS ////////////////////////// function _callCloseAndOpen( SaverExchangeCore.ExchangeData memory _exchangeData, LoanShiftData memory _loanShift ) internal { address protoAddr = shifterRegistry.getAddr(getNameByProtocol(uint8(_loanShift.fromProtocol))); uint loanAmount = _loanShift.debtAmount; if (_loanShift.wholeDebt) { loanAmount = ILoanShifter(protoAddr).getLoanAmount(_loanShift.id1, _loanShift.addrLoan1); } ( uint[8] memory numData, address[8] memory addrData, uint8[3] memory enumData, bytes memory callData ) = _packData(_loanShift, _exchangeData); // encode data bytes memory paramsData = abi.encode(numData, addrData, enumData, callData, address(this)); address payable loanShifterReceiverAddr = payable(shifterRegistry.getAddr("LOAN_SHIFTER_RECEIVER")); // call FL givePermission(loanShifterReceiverAddr); lendingPool.flashLoan(loanShifterReceiverAddr, getLoanAddr(_loanShift.debtAddr1, _loanShift.fromProtocol), loanAmount, paramsData); removePermission(loanShifterReceiverAddr); } function _forkVault(LoanShiftData memory _loanShift) internal { // Create new Vault to move to if (_loanShift.id2 == 0) { _loanShift.id2 = manager.open(manager.ilks(_loanShift.id1), address(this)); } if (_loanShift.wholeDebt) { manager.shift(_loanShift.id1, _loanShift.id2); } } function _isSameTypeVaults(LoanShiftData memory _loanShift) internal pure returns (bool) { return _loanShift.fromProtocol == Protocols.MCD && _loanShift.toProtocol == Protocols.MCD && _loanShift.addrLoan1 == _loanShift.addrLoan2; } function getNameByProtocol(uint8 _proto) internal pure returns (string memory) { if (_proto == 0) { return "MCD_SHIFTER"; } else if (_proto == 1) { return "COMP_SHIFTER"; } } function getLoanAddr(address _address, Protocols _fromProtocol) internal returns (address) { if (_fromProtocol == Protocols.COMPOUND) { return CTokenInterface(_address).underlying(); } else if (_fromProtocol == Protocols.MCD) { return DAI_ADDRESS; } else { return address(0); } } function _packData( LoanShiftData memory _loanShift, SaverExchangeCore.ExchangeData memory exchangeData ) internal pure returns (uint[8] memory numData, address[8] memory addrData, uint8[3] memory enumData, bytes memory callData) { numData = [ _loanShift.collAmount, _loanShift.debtAmount, _loanShift.id1, _loanShift.id2, exchangeData.srcAmount, exchangeData.destAmount, exchangeData.minPrice, exchangeData.price0x ]; addrData = [ _loanShift.addrLoan1, _loanShift.addrLoan2, _loanShift.debtAddr1, _loanShift.debtAddr2, exchangeData.srcAddr, exchangeData.destAddr, exchangeData.exchangeAddr, exchangeData.wrapper ]; enumData = [ uint8(_loanShift.fromProtocol), uint8(_loanShift.toProtocol), uint8(_loanShift.swapType) ]; callData = exchangeData.callData; } } contract ShifterRegistry is AdminAuth { mapping (string => address) public contractAddresses; bool public finalized; function changeContractAddr(string memory _contractName, address _protoAddr) public onlyOwner { require(!finalized); contractAddresses[_contractName] = _protoAddr; } function lock() public onlyOwner { finalized = true; } function getAddr(string memory _contractName) public view returns (address contractAddr) { contractAddr = contractAddresses[_contractName]; require(contractAddr != address(0), "No contract address registred"); } } library Address { function isContract(address account) internal view returns (bool) { // According to EIP-1052, 0x0 is the value returned for not-yet created accounts // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned // for accounts without code, i.e. `keccak256('')` bytes32 codehash; bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470; // solhint-disable-next-line no-inline-assembly assembly { codehash := extcodehash(account) } return (codehash != accountHash && codehash != 0x0); } function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return _functionCallWithValue(target, data, 0, errorMessage); } function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); return _functionCallWithValue(target, data, value, errorMessage); } function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) { require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: weiValue }(data); if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } contract BotRegistry is AdminAuth { mapping (address => bool) public botList; constructor() public { botList[0x776B4a13093e30B05781F97F6A4565B6aa8BE330] = true; botList[0xAED662abcC4FA3314985E67Ea993CAD064a7F5cF] = true; botList[0xa5d330F6619d6bF892A5B87D80272e1607b3e34D] = true; botList[0x5feB4DeE5150B589a7f567EA7CADa2759794A90A] = true; botList[0x7ca06417c1d6f480d3bB195B80692F95A6B66158] = true; } function setBot(address _botAddr, bool _state) public onlyOwner { botList[_botAddr] = _state; } } contract DFSProxy is Auth { string public constant NAME = "DFSProxy"; string public constant VERSION = "v0.1"; mapping(address => mapping(uint => bool)) public nonces; // --- EIP712 niceties --- bytes32 public DOMAIN_SEPARATOR; bytes32 public constant PERMIT_TYPEHASH = keccak256("callProxy(address _user,address _proxy,address _contract,bytes _txData,uint256 _nonce)"); constructor(uint256 chainId_) public { DOMAIN_SEPARATOR = keccak256(abi.encode( keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"), keccak256(bytes(NAME)), keccak256(bytes(VERSION)), chainId_, address(this) )); } function callProxy(address _user, address _proxy, address _contract, bytes calldata _txData, uint256 _nonce, uint8 _v, bytes32 _r, bytes32 _s) external payable onlyAuthorized { bytes32 digest = keccak256(abi.encodePacked( "\x19\x01", DOMAIN_SEPARATOR, keccak256(abi.encode(PERMIT_TYPEHASH, _user, _proxy, _contract, _txData, _nonce)) )); // user must be proxy owner require(DSProxyInterface(_proxy).owner() == _user); require(_user == ecrecover(digest, _v, _r, _s), "DFSProxy/user-not-valid"); require(!nonces[_user][_nonce], "DFSProxy/invalid-nonce"); nonces[_user][_nonce] = true; DSProxyInterface(_proxy).execute{value: msg.value}(_contract, _txData); } } contract DebugInfo { mapping (string => uint) public uintValues; mapping (string => address) public addrValues; mapping (string => string) public stringValues; mapping (string => bytes32) public bytes32Values; function logUint(string memory _id, uint _value) public { uintValues[_id] = _value; } function logAddr(string memory _id, address _value) public { addrValues[_id] = _value; } function logString(string memory _id, string memory _value) public { stringValues[_id] = _value; } function logBytes32(string memory _id, bytes32 _value) public { bytes32Values[_id] = _value; } } contract Discount { address public owner; mapping(address => CustomServiceFee) public serviceFees; uint256 constant MAX_SERVICE_FEE = 400; struct CustomServiceFee { bool active; uint256 amount; } constructor() public { owner = msg.sender; } function isCustomFeeSet(address _user) public view returns (bool) { return serviceFees[_user].active; } function getCustomServiceFee(address _user) public view returns (uint256) { return serviceFees[_user].amount; } function setServiceFee(address _user, uint256 _fee) public { require(msg.sender == owner, "Only owner"); require(_fee >= MAX_SERVICE_FEE || _fee == 0); serviceFees[_user] = CustomServiceFee({active: true, amount: _fee}); } function disableServiceFee(address _user) public { require(msg.sender == owner, "Only owner"); serviceFees[_user] = CustomServiceFee({active: false, amount: 0}); } } contract DydxFlashLoanBase { using SafeMath for uint256; address public constant SOLO_MARGIN_ADDRESS = 0x1E0447b19BB6EcFdAe1e4AE1694b0C3659614e4e; function _getMarketIdFromTokenAddress(address token) internal view returns (uint256) { return 0; } function _getRepaymentAmountInternal(uint256 amount) internal view returns (uint256) { // Needs to be overcollateralize // Needs to provide +2 wei to be safe return amount.add(2); } function _getAccountInfo() internal view returns (Account.Info memory) { return Account.Info({owner: address(this), number: 1}); } function _getWithdrawAction(uint marketId, uint256 amount, address contractAddr) internal view returns (Actions.ActionArgs memory) { return Actions.ActionArgs({ actionType: Actions.ActionType.Withdraw, accountId: 0, amount: Types.AssetAmount({ sign: false, denomination: Types.AssetDenomination.Wei, ref: Types.AssetReference.Delta, value: amount }), primaryMarketId: marketId, secondaryMarketId: 0, otherAddress: contractAddr, otherAccountId: 0, data: "" }); } function _getCallAction(bytes memory data, address contractAddr) internal view returns (Actions.ActionArgs memory) { return Actions.ActionArgs({ actionType: Actions.ActionType.Call, accountId: 0, amount: Types.AssetAmount({ sign: false, denomination: Types.AssetDenomination.Wei, ref: Types.AssetReference.Delta, value: 0 }), primaryMarketId: 0, secondaryMarketId: 0, otherAddress: contractAddr, otherAccountId: 0, data: data }); } function _getDepositAction(uint marketId, uint256 amount, address contractAddr) internal view returns (Actions.ActionArgs memory) { return Actions.ActionArgs({ actionType: Actions.ActionType.Deposit, accountId: 0, amount: Types.AssetAmount({ sign: true, denomination: Types.AssetDenomination.Wei, ref: Types.AssetReference.Delta, value: amount }), primaryMarketId: marketId, secondaryMarketId: 0, otherAddress: contractAddr, otherAccountId: 0, data: "" }); } } contract ExchangeDataParser { function decodeExchangeData( SaverExchangeCore.ExchangeData memory exchangeData ) internal pure returns (address[4] memory, uint[4] memory, bytes memory) { return ( [exchangeData.srcAddr, exchangeData.destAddr, exchangeData.exchangeAddr, exchangeData.wrapper], [exchangeData.srcAmount, exchangeData.destAmount, exchangeData.minPrice, exchangeData.price0x], exchangeData.callData ); } function encodeExchangeData( address[4] memory exAddr, uint[4] memory exNum, bytes memory callData ) internal pure returns (SaverExchangeCore.ExchangeData memory) { return SaverExchangeCore.ExchangeData({ srcAddr: exAddr[0], destAddr: exAddr[1], srcAmount: exNum[0], destAmount: exNum[1], minPrice: exNum[2], wrapper: exAddr[3], exchangeAddr: exAddr[2], callData: callData, price0x: exNum[3] }); } } interface IFlashLoanReceiver { function executeOperation(address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external; } abstract contract ILendingPoolAddressesProvider { function getLendingPool() public view virtual returns (address); function setLendingPoolImpl(address _pool) public virtual; function getLendingPoolCore() public virtual view returns (address payable); function setLendingPoolCoreImpl(address _lendingPoolCore) public virtual; function getLendingPoolConfigurator() public virtual view returns (address); function setLendingPoolConfiguratorImpl(address _configurator) public virtual; function getLendingPoolDataProvider() public virtual view returns (address); function setLendingPoolDataProviderImpl(address _provider) public virtual; function getLendingPoolParametersProvider() public virtual view returns (address); function setLendingPoolParametersProviderImpl(address _parametersProvider) public virtual; function getTokenDistributor() public virtual view returns (address); function setTokenDistributor(address _tokenDistributor) public virtual; function getFeeProvider() public virtual view returns (address); function setFeeProviderImpl(address _feeProvider) public virtual; function getLendingPoolLiquidationManager() public virtual view returns (address); function setLendingPoolLiquidationManager(address _manager) public virtual; function getLendingPoolManager() public virtual view returns (address); function setLendingPoolManager(address _lendingPoolManager) public virtual; function getPriceOracle() public virtual view returns (address); function setPriceOracle(address _priceOracle) public virtual; function getLendingRateOracle() public view virtual returns (address); function setLendingRateOracle(address _lendingRateOracle) public virtual; } library EthAddressLib { function ethAddress() internal pure returns(address) { return 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; } } abstract contract FlashLoanReceiverBase is IFlashLoanReceiver { using SafeERC20 for ERC20; using SafeMath for uint256; ILendingPoolAddressesProvider public addressesProvider; constructor(ILendingPoolAddressesProvider _provider) public { addressesProvider = _provider; } receive () external virtual payable {} function transferFundsBackToPoolInternal(address _reserve, uint256 _amount) internal { address payable core = addressesProvider.getLendingPoolCore(); transferInternal(core,_reserve, _amount); } function transferInternal(address payable _destination, address _reserve, uint256 _amount) internal { if(_reserve == EthAddressLib.ethAddress()) { //solium-disable-next-line _destination.call{value: _amount}(""); return; } ERC20(_reserve).safeTransfer(_destination, _amount); } function getBalanceInternal(address _target, address _reserve) internal view returns(uint256) { if(_reserve == EthAddressLib.ethAddress()) { return _target.balance; } return ERC20(_reserve).balanceOf(_target); } } contract GasBurner { // solhint-disable-next-line const-name-snakecase GasTokenInterface public constant gasToken = GasTokenInterface(0x0000000000b3F879cb30FE243b4Dfee438691c04); modifier burnGas(uint _amount) { if (gasToken.balanceOf(address(this)) >= _amount) { gasToken.free(_amount); } _; } } library SafeERC20 { using SafeMath for uint256; using Address for address; function safeTransfer(ERC20 token, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } function safeTransferFrom(ERC20 token, address from, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value)); } /** * @dev Deprecated. This function has issues similar to the ones found in * {IERC20-approve}, and its usage is discouraged. */ function safeApprove(ERC20 token, address spender, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value)); } function safeIncreaseAllowance(ERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).add(value); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } function safeDecreaseAllowance(ERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero"); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } function _callOptionalReturn(ERC20 token, bytes memory data) private { bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed"); if (returndata.length > 0) { // Return data is optional // solhint-disable-next-line max-line-length require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } } } library SafeMath { function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } contract ZrxAllowlist is AdminAuth { mapping (address => bool) public zrxAllowlist; mapping(address => bool) private nonPayableAddrs; constructor() public { zrxAllowlist[0x6958F5e95332D93D21af0D7B9Ca85B8212fEE0A5] = true; zrxAllowlist[0x61935CbDd02287B511119DDb11Aeb42F1593b7Ef] = true; zrxAllowlist[0xDef1C0ded9bec7F1a1670819833240f027b25EfF] = true; zrxAllowlist[0x080bf510FCbF18b91105470639e9561022937712] = true; nonPayableAddrs[0x080bf510FCbF18b91105470639e9561022937712] = true; } function setAllowlistAddr(address _zrxAddr, bool _state) public onlyOwner { zrxAllowlist[_zrxAddr] = _state; } function isZrxAddr(address _zrxAddr) public view returns (bool) { return zrxAllowlist[_zrxAddr]; } function addNonPayableAddr(address _nonPayableAddr) public onlyOwner { nonPayableAddrs[_nonPayableAddr] = true; } function removeNonPayableAddr(address _nonPayableAddr) public onlyOwner { nonPayableAddrs[_nonPayableAddr] = false; } function isNonPayableAddr(address _addr) public view returns(bool) { return nonPayableAddrs[_addr]; } } contract AaveBasicProxy is GasBurner { using SafeERC20 for ERC20; address public constant ETH_ADDR = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant AAVE_LENDING_POOL_ADDRESSES = 0x24a42fD28C976A61Df5D00D0599C34c4f90748c8; uint16 public constant AAVE_REFERRAL_CODE = 64; /// @notice User deposits tokens to the Aave protocol /// @dev User needs to approve the DSProxy to pull the _tokenAddr tokens /// @param _tokenAddr The address of the token to be deposited /// @param _amount Amount of tokens to be deposited function deposit(address _tokenAddr, uint256 _amount) public burnGas(5) payable { address lendingPoolCore = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); uint ethValue = _amount; if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(this), _amount); approveToken(_tokenAddr, lendingPoolCore); ethValue = 0; } ILendingPool(lendingPool).deposit{value: ethValue}(_tokenAddr, _amount, AAVE_REFERRAL_CODE); setUserUseReserveAsCollateralIfNeeded(_tokenAddr); } /// @notice User withdraws tokens from the Aave protocol /// @param _tokenAddr The address of the token to be withdrawn /// @param _aTokenAddr ATokens to be withdrawn /// @param _amount Amount of tokens to be withdrawn /// @param _wholeAmount If true we will take the whole amount on chain function withdraw(address _tokenAddr, address _aTokenAddr, uint256 _amount, bool _wholeAmount) public burnGas(8) { uint256 amount = _wholeAmount ? ERC20(_aTokenAddr).balanceOf(address(this)) : _amount; IAToken(_aTokenAddr).redeem(amount); withdrawTokens(_tokenAddr); } /// @notice User borrows tokens to the Aave protocol /// @param _tokenAddr The address of the token to be borrowed /// @param _amount Amount of tokens to be borrowed /// @param _type Send 1 for variable rate and 2 for fixed rate function borrow(address _tokenAddr, uint256 _amount, uint256 _type) public burnGas(8) { address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); ILendingPool(lendingPool).borrow(_tokenAddr, _amount, _type, AAVE_REFERRAL_CODE); withdrawTokens(_tokenAddr); } /// @dev User needs to approve the DSProxy to pull the _tokenAddr tokens /// @notice User paybacks tokens to the Aave protocol /// @param _tokenAddr The address of the token to be paybacked /// @param _aTokenAddr ATokens to be paybacked /// @param _amount Amount of tokens to be payed back /// @param _wholeDebt If true the _amount will be set to the whole amount of the debt function payback(address _tokenAddr, address _aTokenAddr, uint256 _amount, bool _wholeDebt) public burnGas(3) payable { address lendingPoolCore = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); uint256 amount = _amount; (,uint256 borrowAmount,,,,,uint256 originationFee,,,) = ILendingPool(lendingPool).getUserReserveData(_tokenAddr, address(this)); if (_wholeDebt) { amount = borrowAmount; } amount += originationFee; if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(this), amount); approveToken(_tokenAddr, lendingPoolCore); } ILendingPool(lendingPool).repay{value: msg.value}(_tokenAddr, amount, payable(address(this))); withdrawTokens(_tokenAddr); } /// @dev User needs to approve the DSProxy to pull the _tokenAddr tokens /// @notice User paybacks tokens to the Aave protocol /// @param _tokenAddr The address of the token to be paybacked /// @param _aTokenAddr ATokens to be paybacked /// @param _amount Amount of tokens to be payed back /// @param _wholeDebt If true the _amount will be set to the whole amount of the debt function paybackOnBehalf(address _tokenAddr, address _aTokenAddr, uint256 _amount, bool _wholeDebt, address payable _onBehalf) public burnGas(3) payable { address lendingPoolCore = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); uint256 amount = _amount; (,uint256 borrowAmount,,,,,uint256 originationFee,,,) = ILendingPool(lendingPool).getUserReserveData(_tokenAddr, _onBehalf); if (_wholeDebt) { amount = borrowAmount; } amount += originationFee; if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(this), amount); approveToken(_tokenAddr, lendingPoolCore); } ILendingPool(lendingPool).repay{value: msg.value}(_tokenAddr, amount, _onBehalf); withdrawTokens(_tokenAddr); } /// @notice Helper method to withdraw tokens from the DSProxy /// @param _tokenAddr Address of the token to be withdrawn function withdrawTokens(address _tokenAddr) public { uint256 amount = _tokenAddr == ETH_ADDR ? address(this).balance : ERC20(_tokenAddr).balanceOf(address(this)); if (amount > 0) { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransfer(msg.sender, amount); } else { msg.sender.transfer(amount); } } } /// @notice Approves token contract to pull underlying tokens from the DSProxy /// @param _tokenAddr Token we are trying to approve /// @param _caller Address which will gain the approval function approveToken(address _tokenAddr, address _caller) internal { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeApprove(_caller, 0); ERC20(_tokenAddr).safeApprove(_caller, uint256(-1)); } } function setUserUseReserveAsCollateralIfNeeded(address _tokenAddr) public { address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); (,,,,,,,,,bool collateralEnabled) = ILendingPool(lendingPool).getUserReserveData(_tokenAddr, address(this)); if (!collateralEnabled) { ILendingPool(lendingPool).setUserUseReserveAsCollateral(_tokenAddr, true); } } function setUserUseReserveAsCollateral(address _tokenAddr, bool _true) public { address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); ILendingPool(lendingPool).setUserUseReserveAsCollateral(_tokenAddr, _true); } function swapBorrowRateMode(address _reserve) public { address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); ILendingPool(lendingPool).swapBorrowRateMode(_reserve); } } contract AaveLoanInfo is AaveSafetyRatio { struct LoanData { address user; uint128 ratio; address[] collAddr; address[] borrowAddr; uint256[] collAmounts; uint256[] borrowAmounts; } struct TokenInfo { address aTokenAddress; address underlyingTokenAddress; uint256 collateralFactor; uint256 price; } struct TokenInfoFull { address aTokenAddress; address underlyingTokenAddress; uint256 supplyRate; uint256 borrowRate; uint256 totalSupply; uint256 availableLiquidity; uint256 totalBorrow; uint256 collateralFactor; uint256 price; bool usageAsCollateralEnabled; } /// @notice Calcualted the ratio of coll/debt for a compound user /// @param _user Address of the user function getRatio(address _user) public view returns (uint256) { // For each asset the account is in return getSafetyRatio(_user); } /// @notice Fetches Aave prices for tokens /// @param _tokens Arr. of tokens for which to get the prices /// @return prices Array of prices function getPrices(address[] memory _tokens) public view returns (uint256[] memory prices) { address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); prices = new uint[](_tokens.length); for (uint256 i = 0; i < _tokens.length; ++i) { prices[i] = IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_tokens[i]); } } /// @notice Fetches Aave collateral factors for tokens /// @param _tokens Arr. of tokens for which to get the coll. factors /// @return collFactors Array of coll. factors function getCollFactors(address[] memory _tokens) public view returns (uint256[] memory collFactors) { address lendingPoolCoreAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); collFactors = new uint256[](_tokens.length); for (uint256 i = 0; i < _tokens.length; ++i) { (,collFactors[i],,) = ILendingPool(lendingPoolCoreAddress).getReserveConfiguration(_tokens[i]); } } function getTokenBalances(address _user, address[] memory _tokens) public view returns (uint256[] memory balances, uint256[] memory borrows, bool[] memory enabledAsCollateral) { address lendingPoolAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); balances = new uint256[](_tokens.length); borrows = new uint256[](_tokens.length); enabledAsCollateral = new bool[](_tokens.length); for (uint256 i = 0; i < _tokens.length; i++) { address asset = _tokens[i]; (balances[i], borrows[i],,,,,,,,enabledAsCollateral[i]) = ILendingPool(lendingPoolAddress).getUserReserveData(asset, _user); } } /// @notice Calcualted the ratio of coll/debt for an aave user /// @param _users Addresses of the user /// @return ratios Array of ratios function getRatios(address[] memory _users) public view returns (uint256[] memory ratios) { ratios = new uint256[](_users.length); for (uint256 i = 0; i < _users.length; ++i) { ratios[i] = getSafetyRatio(_users[i]); } } /// @notice Information about reserves /// @param _tokenAddresses Array of tokens addresses /// @return tokens Array of reserves infomartion function getTokensInfo(address[] memory _tokenAddresses) public view returns(TokenInfo[] memory tokens) { address lendingPoolCoreAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); tokens = new TokenInfo[](_tokenAddresses.length); for (uint256 i = 0; i < _tokenAddresses.length; ++i) { (,uint256 ltv,,) = ILendingPool(lendingPoolCoreAddress).getReserveConfiguration(_tokenAddresses[i]); tokens[i] = TokenInfo({ aTokenAddress: ILendingPool(lendingPoolCoreAddress).getReserveATokenAddress(_tokenAddresses[i]), underlyingTokenAddress: _tokenAddresses[i], collateralFactor: ltv, price: IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_tokenAddresses[i]) }); } } /// @notice Information about reserves /// @param _tokenAddresses Array of token addresses /// @return tokens Array of reserves infomartion function getFullTokensInfo(address[] memory _tokenAddresses) public view returns(TokenInfoFull[] memory tokens) { address lendingPoolCoreAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); tokens = new TokenInfoFull[](_tokenAddresses.length); for (uint256 i = 0; i < _tokenAddresses.length; ++i) { (,uint256 ltv,,bool usageAsCollateralEnabled) = ILendingPool(lendingPoolCoreAddress).getReserveConfiguration(_tokenAddresses[i]); tokens[i] = TokenInfoFull({ aTokenAddress: ILendingPool(lendingPoolCoreAddress).getReserveATokenAddress(_tokenAddresses[i]), underlyingTokenAddress: _tokenAddresses[i], supplyRate: ILendingPool(lendingPoolCoreAddress).getReserveCurrentLiquidityRate(_tokenAddresses[i]), borrowRate: ILendingPool(lendingPoolCoreAddress).getReserveCurrentVariableBorrowRate(_tokenAddresses[i]), totalSupply: ILendingPool(lendingPoolCoreAddress).getReserveTotalLiquidity(_tokenAddresses[i]), availableLiquidity: ILendingPool(lendingPoolCoreAddress).getReserveAvailableLiquidity(_tokenAddresses[i]), totalBorrow: ILendingPool(lendingPoolCoreAddress).getReserveTotalBorrowsVariable(_tokenAddresses[i]), collateralFactor: ltv, price: IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_tokenAddresses[i]), usageAsCollateralEnabled: usageAsCollateralEnabled }); } } /// @notice Fetches all the collateral/debt address and amounts, denominated in ether /// @param _user Address of the user /// @return data LoanData information function getLoanData(address _user) public view returns (LoanData memory data) { address lendingPoolAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); address[] memory reserves = ILendingPool(lendingPoolAddress).getReserves(); data = LoanData({ user: _user, ratio: 0, collAddr: new address[](reserves.length), borrowAddr: new address[](reserves.length), collAmounts: new uint[](reserves.length), borrowAmounts: new uint[](reserves.length) }); uint64 collPos = 0; uint64 borrowPos = 0; for (uint64 i = 0; i < reserves.length; i++) { address reserve = reserves[i]; (uint256 aTokenBalance, uint256 borrowBalance,,,,,,,,) = ILendingPool(lendingPoolAddress).getUserReserveData(reserve, _user); uint256 price = IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(reserves[i]); if (aTokenBalance > 0) { uint256 userTokenBalanceEth = wmul(aTokenBalance, price) * (10 ** (18 - getDecimals(reserve))); data.collAddr[collPos] = reserve; data.collAmounts[collPos] = userTokenBalanceEth; collPos++; } // Sum up debt in Eth if (borrowBalance > 0) { uint256 userBorrowBalanceEth = wmul(borrowBalance, price) * (10 ** (18 - getDecimals(reserve))); data.borrowAddr[borrowPos] = reserve; data.borrowAmounts[borrowPos] = userBorrowBalanceEth; borrowPos++; } } data.ratio = uint128(getSafetyRatio(_user)); return data; } /// @notice Fetches all the collateral/debt address and amounts, denominated in ether /// @param _users Addresses of the user /// @return loans Array of LoanData information function getLoanDataArr(address[] memory _users) public view returns (LoanData[] memory loans) { loans = new LoanData[](_users.length); for (uint i = 0; i < _users.length; ++i) { loans[i] = getLoanData(_users[i]); } } function getDecimals(address _token) internal view returns (uint256) { if (_token == ETH_ADDR) return 18; return ERC20(_token).decimals(); } } contract AaveMonitor is AdminAuth, DSMath, AaveSafetyRatio, GasBurner { using SafeERC20 for ERC20; enum Method { Boost, Repay } uint public REPAY_GAS_TOKEN = 19; uint public BOOST_GAS_TOKEN = 19; uint public MAX_GAS_PRICE = 200000000000; // 200 gwei uint public REPAY_GAS_COST = 2000000; uint public BOOST_GAS_COST = 2000000; address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; AaveMonitorProxy public aaveMonitorProxy; AaveSubscriptions public subscriptionsContract; address public aaveSaverProxy; DefisaverLogger public logger = DefisaverLogger(DEFISAVER_LOGGER); modifier onlyApproved() { require(BotRegistry(BOT_REGISTRY_ADDRESS).botList(msg.sender), "Not auth bot"); _; } /// @param _aaveMonitorProxy Proxy contracts that actually is authorized to call DSProxy /// @param _subscriptions Subscriptions contract for Aave positions /// @param _aaveSaverProxy Contract that actually performs Repay/Boost constructor(address _aaveMonitorProxy, address _subscriptions, address _aaveSaverProxy) public { aaveMonitorProxy = AaveMonitorProxy(_aaveMonitorProxy); subscriptionsContract = AaveSubscriptions(_subscriptions); aaveSaverProxy = _aaveSaverProxy; } /// @notice Bots call this method to repay for user when conditions are met /// @dev If the contract ownes gas token it will try and use it for gas price reduction /// @param _exData Exchange data /// @param _user The actual address that owns the Aave position function repayFor( SaverExchangeCore.ExchangeData memory _exData, address _user ) public payable onlyApproved burnGas(REPAY_GAS_TOKEN) { (bool isAllowed, uint ratioBefore) = canCall(Method.Repay, _user); require(isAllowed); // check if conditions are met uint256 gasCost = calcGasCost(REPAY_GAS_COST); aaveMonitorProxy.callExecute{value: msg.value}( _user, aaveSaverProxy, abi.encodeWithSignature( "repay((address,address,uint256,uint256,uint256,address,address,bytes,uint256),uint256)", _exData, gasCost ) ); (bool isGoodRatio, uint ratioAfter) = ratioGoodAfter(Method.Repay, _user); require(isGoodRatio); // check if the after result of the actions is good returnEth(); logger.Log(address(this), _user, "AutomaticAaveRepay", abi.encode(ratioBefore, ratioAfter)); } /// @notice Bots call this method to boost for user when conditions are met /// @dev If the contract ownes gas token it will try and use it for gas price reduction /// @param _exData Exchange data /// @param _user The actual address that owns the Aave position function boostFor( SaverExchangeCore.ExchangeData memory _exData, address _user ) public payable onlyApproved burnGas(BOOST_GAS_TOKEN) { (bool isAllowed, uint ratioBefore) = canCall(Method.Boost, _user); require(isAllowed); // check if conditions are met uint256 gasCost = calcGasCost(BOOST_GAS_COST); aaveMonitorProxy.callExecute{value: msg.value}( _user, aaveSaverProxy, abi.encodeWithSignature( "boost((address,address,uint256,uint256,uint256,address,address,bytes,uint256),uint256)", _exData, gasCost ) ); (bool isGoodRatio, uint ratioAfter) = ratioGoodAfter(Method.Boost, _user); require(isGoodRatio); // check if the after result of the actions is good returnEth(); logger.Log(address(this), _user, "AutomaticAaveBoost", abi.encode(ratioBefore, ratioAfter)); } /******************* INTERNAL METHODS ********************************/ function returnEth() internal { // return if some eth left if (address(this).balance > 0) { msg.sender.transfer(address(this).balance); } } /******************* STATIC METHODS ********************************/ /// @notice Checks if Boost/Repay could be triggered for the CDP /// @dev Called by AaveMonitor to enforce the min/max check /// @param _method Type of action to be called /// @param _user The actual address that owns the Aave position /// @return Boolean if it can be called and the ratio function canCall(Method _method, address _user) public view returns(bool, uint) { bool subscribed = subscriptionsContract.isSubscribed(_user); AaveSubscriptions.AaveHolder memory holder = subscriptionsContract.getHolder(_user); // check if cdp is subscribed if (!subscribed) return (false, 0); // check if boost and boost allowed if (_method == Method.Boost && !holder.boostEnabled) return (false, 0); uint currRatio = getSafetyRatio(_user); if (_method == Method.Repay) { return (currRatio < holder.minRatio, currRatio); } else if (_method == Method.Boost) { return (currRatio > holder.maxRatio, currRatio); } } /// @dev After the Boost/Repay check if the ratio doesn't trigger another call /// @param _method Type of action to be called /// @param _user The actual address that owns the Aave position /// @return Boolean if the recent action preformed correctly and the ratio function ratioGoodAfter(Method _method, address _user) public view returns(bool, uint) { AaveSubscriptions.AaveHolder memory holder; holder= subscriptionsContract.getHolder(_user); uint currRatio = getSafetyRatio(_user); if (_method == Method.Repay) { return (currRatio < holder.maxRatio, currRatio); } else if (_method == Method.Boost) { return (currRatio > holder.minRatio, currRatio); } } /// @notice Calculates gas cost (in Eth) of tx /// @dev Gas price is limited to MAX_GAS_PRICE to prevent attack of draining user CDP /// @param _gasAmount Amount of gas used for the tx function calcGasCost(uint _gasAmount) public view returns (uint) { uint gasPrice = tx.gasprice <= MAX_GAS_PRICE ? tx.gasprice : MAX_GAS_PRICE; return mul(gasPrice, _gasAmount); } /******************* OWNER ONLY OPERATIONS ********************************/ /// @notice Allows owner to change gas cost for boost operation, but only up to 3 millions /// @param _gasCost New gas cost for boost method function changeBoostGasCost(uint _gasCost) public onlyOwner { require(_gasCost < 3000000); BOOST_GAS_COST = _gasCost; } /// @notice Allows owner to change gas cost for repay operation, but only up to 3 millions /// @param _gasCost New gas cost for repay method function changeRepayGasCost(uint _gasCost) public onlyOwner { require(_gasCost < 3000000); REPAY_GAS_COST = _gasCost; } /// @notice Allows owner to change max gas price /// @param _maxGasPrice New max gas price function changeMaxGasPrice(uint _maxGasPrice) public onlyOwner { require(_maxGasPrice < 500000000000); MAX_GAS_PRICE = _maxGasPrice; } /// @notice Allows owner to change gas token amount /// @param _gasTokenAmount New gas token amount /// @param _repay true if repay gas token, false if boost gas token function changeGasTokenAmount(uint _gasTokenAmount, bool _repay) public onlyOwner { if (_repay) { REPAY_GAS_TOKEN = _gasTokenAmount; } else { BOOST_GAS_TOKEN = _gasTokenAmount; } } } contract AaveMonitorProxy is AdminAuth { using SafeERC20 for ERC20; uint public CHANGE_PERIOD; address public monitor; address public newMonitor; address public lastMonitor; uint public changeRequestedTimestamp; mapping(address => bool) public allowed; event MonitorChangeInitiated(address oldMonitor, address newMonitor); event MonitorChangeCanceled(); event MonitorChangeFinished(address monitor); event MonitorChangeReverted(address monitor); // if someone who is allowed become malicious, owner can't be changed modifier onlyAllowed() { require(allowed[msg.sender] || msg.sender == owner); _; } modifier onlyMonitor() { require (msg.sender == monitor); _; } constructor(uint _changePeriod) public { CHANGE_PERIOD = _changePeriod * 1 days; } /// @notice Only monitor contract is able to call execute on users proxy /// @param _owner Address of cdp owner (users DSProxy address) /// @param _aaveSaverProxy Address of AaveSaverProxy /// @param _data Data to send to AaveSaverProxy function callExecute(address _owner, address _aaveSaverProxy, bytes memory _data) public payable onlyMonitor { // execute reverts if calling specific method fails DSProxyInterface(_owner).execute{value: msg.value}(_aaveSaverProxy, _data); // return if anything left if (address(this).balance > 0) { msg.sender.transfer(address(this).balance); } } /// @notice Allowed users are able to set Monitor contract without any waiting period first time /// @param _monitor Address of Monitor contract function setMonitor(address _monitor) public onlyAllowed { require(monitor == address(0)); monitor = _monitor; } /// @notice Allowed users are able to start procedure for changing monitor /// @dev after CHANGE_PERIOD needs to call confirmNewMonitor to actually make a change /// @param _newMonitor address of new monitor function changeMonitor(address _newMonitor) public onlyAllowed { require(changeRequestedTimestamp == 0); changeRequestedTimestamp = now; lastMonitor = monitor; newMonitor = _newMonitor; emit MonitorChangeInitiated(lastMonitor, newMonitor); } /// @notice At any point allowed users are able to cancel monitor change function cancelMonitorChange() public onlyAllowed { require(changeRequestedTimestamp > 0); changeRequestedTimestamp = 0; newMonitor = address(0); emit MonitorChangeCanceled(); } /// @notice Anyone is able to confirm new monitor after CHANGE_PERIOD if process is started function confirmNewMonitor() public onlyAllowed { require((changeRequestedTimestamp + CHANGE_PERIOD) < now); require(changeRequestedTimestamp != 0); require(newMonitor != address(0)); monitor = newMonitor; newMonitor = address(0); changeRequestedTimestamp = 0; emit MonitorChangeFinished(monitor); } /// @notice Its possible to revert monitor to last used monitor function revertMonitor() public onlyAllowed { require(lastMonitor != address(0)); monitor = lastMonitor; emit MonitorChangeReverted(monitor); } /// @notice Allowed users are able to add new allowed user /// @param _user Address of user that will be allowed function addAllowed(address _user) public onlyAllowed { allowed[_user] = true; } /// @notice Allowed users are able to remove allowed user /// @dev owner is always allowed even if someone tries to remove it from allowed mapping /// @param _user Address of allowed user function removeAllowed(address _user) public onlyAllowed { allowed[_user] = false; } function setChangePeriod(uint _periodInDays) public onlyAllowed { require(_periodInDays * 1 days > CHANGE_PERIOD); CHANGE_PERIOD = _periodInDays * 1 days; } /// @notice In case something is left in contract, owner is able to withdraw it /// @param _token address of token to withdraw balance function withdrawToken(address _token) public onlyOwner { uint balance = ERC20(_token).balanceOf(address(this)); ERC20(_token).safeTransfer(msg.sender, balance); } /// @notice In case something is left in contract, owner is able to withdraw it function withdrawEth() public onlyOwner { uint balance = address(this).balance; msg.sender.transfer(balance); } } contract AaveSubscriptions is AdminAuth { struct AaveHolder { address user; uint128 minRatio; uint128 maxRatio; uint128 optimalRatioBoost; uint128 optimalRatioRepay; bool boostEnabled; } struct SubPosition { uint arrPos; bool subscribed; } AaveHolder[] public subscribers; mapping (address => SubPosition) public subscribersPos; uint public changeIndex; event Subscribed(address indexed user); event Unsubscribed(address indexed user); event Updated(address indexed user); event ParamUpdates(address indexed user, uint128, uint128, uint128, uint128, bool); /// @dev Called by the DSProxy contract which owns the Aave position /// @notice Adds the users Aave poistion in the list of subscriptions so it can be monitored /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalBoost Ratio amount which boost should target /// @param _optimalRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled function subscribe(uint128 _minRatio, uint128 _maxRatio, uint128 _optimalBoost, uint128 _optimalRepay, bool _boostEnabled) external { // if boost is not enabled, set max ratio to max uint uint128 localMaxRatio = _boostEnabled ? _maxRatio : uint128(-1); require(checkParams(_minRatio, localMaxRatio), "Must be correct params"); SubPosition storage subInfo = subscribersPos[msg.sender]; AaveHolder memory subscription = AaveHolder({ minRatio: _minRatio, maxRatio: localMaxRatio, optimalRatioBoost: _optimalBoost, optimalRatioRepay: _optimalRepay, user: msg.sender, boostEnabled: _boostEnabled }); changeIndex++; if (subInfo.subscribed) { subscribers[subInfo.arrPos] = subscription; emit Updated(msg.sender); emit ParamUpdates(msg.sender, _minRatio, localMaxRatio, _optimalBoost, _optimalRepay, _boostEnabled); } else { subscribers.push(subscription); subInfo.arrPos = subscribers.length - 1; subInfo.subscribed = true; emit Subscribed(msg.sender); } } /// @notice Called by the users DSProxy /// @dev Owner who subscribed cancels his subscription function unsubscribe() external { _unsubscribe(msg.sender); } /// @dev Checks limit if minRatio is bigger than max /// @param _minRatio Minimum ratio, bellow which repay can be triggered /// @param _maxRatio Maximum ratio, over which boost can be triggered /// @return Returns bool if the params are correct function checkParams(uint128 _minRatio, uint128 _maxRatio) internal pure returns (bool) { if (_minRatio > _maxRatio) { return false; } return true; } /// @dev Internal method to remove a subscriber from the list /// @param _user The actual address that owns the Aave position function _unsubscribe(address _user) internal { require(subscribers.length > 0, "Must have subscribers in the list"); SubPosition storage subInfo = subscribersPos[_user]; require(subInfo.subscribed, "Must first be subscribed"); address lastOwner = subscribers[subscribers.length - 1].user; SubPosition storage subInfo2 = subscribersPos[lastOwner]; subInfo2.arrPos = subInfo.arrPos; subscribers[subInfo.arrPos] = subscribers[subscribers.length - 1]; subscribers.pop(); // remove last element and reduce arr length changeIndex++; subInfo.subscribed = false; subInfo.arrPos = 0; emit Unsubscribed(msg.sender); } /// @dev Checks if the user is subscribed /// @param _user The actual address that owns the Aave position /// @return If the user is subscribed function isSubscribed(address _user) public view returns (bool) { SubPosition storage subInfo = subscribersPos[_user]; return subInfo.subscribed; } /// @dev Returns subscribtion information about a user /// @param _user The actual address that owns the Aave position /// @return Subscription information about the user if exists function getHolder(address _user) public view returns (AaveHolder memory) { SubPosition storage subInfo = subscribersPos[_user]; return subscribers[subInfo.arrPos]; } /// @notice Helper method to return all the subscribed CDPs /// @return List of all subscribers function getSubscribers() public view returns (AaveHolder[] memory) { return subscribers; } /// @notice Helper method for the frontend, returns all the subscribed CDPs paginated /// @param _page What page of subscribers you want /// @param _perPage Number of entries per page /// @return List of all subscribers for that page function getSubscribersByPage(uint _page, uint _perPage) public view returns (AaveHolder[] memory) { AaveHolder[] memory holders = new AaveHolder[](_perPage); uint start = _page * _perPage; uint end = start + _perPage; end = (end > holders.length) ? holders.length : end; uint count = 0; for (uint i = start; i < end; i++) { holders[count] = subscribers[i]; count++; } return holders; } ////////////// ADMIN METHODS /////////////////// /// @notice Admin function to unsubscribe a position /// @param _user The actual address that owns the Aave position function unsubscribeByAdmin(address _user) public onlyOwner { SubPosition storage subInfo = subscribersPos[_user]; if (subInfo.subscribed) { _unsubscribe(_user); } } } contract AaveSubscriptionsProxy is ProxyPermission { address public constant AAVE_SUBSCRIPTION_ADDRESS = 0xe08ff7A2BADb634F0b581E675E6B3e583De086FC; address public constant AAVE_MONITOR_PROXY = 0xfA560Dba3a8D0B197cA9505A2B98120DD89209AC; /// @notice Calls subscription contract and creates a DSGuard if non existent /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalRatioBoost Ratio amount which boost should target /// @param _optimalRatioRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled function subscribe( uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled ) public { givePermission(AAVE_MONITOR_PROXY); IAaveSubscription(AAVE_SUBSCRIPTION_ADDRESS).subscribe( _minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled); } /// @notice Calls subscription contract and updated existing parameters /// @dev If subscription is non existent this will create one /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalRatioBoost Ratio amount which boost should target /// @param _optimalRatioRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled function update( uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled ) public { IAaveSubscription(AAVE_SUBSCRIPTION_ADDRESS).subscribe(_minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled); } /// @notice Calls the subscription contract to unsubscribe the caller function unsubscribe() public { removePermission(AAVE_MONITOR_PROXY); IAaveSubscription(AAVE_SUBSCRIPTION_ADDRESS).unsubscribe(); } } contract AaveImport is AaveHelper, AdminAuth { using SafeERC20 for ERC20; address public constant WETH_ADDRESS = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address public constant BASIC_PROXY = 0x9D266997bc73B27d4302E711b55FD78B5278e1De; address public constant AETH_ADDRESS = 0x3a3A65aAb0dd2A17E3F1947bA16138cd37d08c04; function callFunction( address sender, Account.Info memory account, bytes memory data ) public { ( address collateralToken, address borrowToken, uint256 ethAmount, address user, address proxy ) = abi.decode(data, (address,address,uint256,address,address)); // withdraw eth TokenInterface(WETH_ADDRESS).withdraw(ethAmount); address lendingPoolCoreAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); address aCollateralToken = ILendingPool(lendingPoolCoreAddress).getReserveATokenAddress(collateralToken); address aBorrowToken = ILendingPool(lendingPoolCoreAddress).getReserveATokenAddress(borrowToken); // deposit eth on behalf of proxy DSProxy(payable(proxy)).execute{value: ethAmount}(BASIC_PROXY, abi.encodeWithSignature("deposit(address,uint256)", ETH_ADDR, ethAmount)); // borrow needed amount to repay users borrow (,uint256 borrowAmount,,uint256 borrowRateMode,,,uint256 originationFee,,,) = ILendingPool(lendingPool).getUserReserveData(borrowToken, user); borrowAmount += originationFee; DSProxy(payable(proxy)).execute(BASIC_PROXY, abi.encodeWithSignature("borrow(address,uint256,uint256)", borrowToken, borrowAmount, borrowRateMode)); // payback on behalf of user ERC20(borrowToken).safeApprove(proxy, borrowAmount); DSProxy(payable(proxy)).execute(BASIC_PROXY, abi.encodeWithSignature("paybackOnBehalf(address,address,uint256,bool,address)", borrowToken, aBorrowToken, 0, true, user)); // pull tokens from user to proxy ERC20(aCollateralToken).safeTransferFrom(user, proxy, ERC20(aCollateralToken).balanceOf(user)); // enable as collateral DSProxy(payable(proxy)).execute(BASIC_PROXY, abi.encodeWithSignature("setUserUseReserveAsCollateralIfNeeded(address)", collateralToken)); // withdraw deposited eth DSProxy(payable(proxy)).execute(BASIC_PROXY, abi.encodeWithSignature("withdraw(address,address,uint256,bool)", ETH_ADDR, AETH_ADDRESS, ethAmount, false)); // deposit eth, get weth and return to sender TokenInterface(WETH_ADDRESS).deposit.value(address(this).balance)(); ERC20(WETH_ADDRESS).safeTransfer(proxy, ethAmount+2); } /// @dev if contract receive eth, convert it to WETH receive() external payable { // deposit eth and get weth if (msg.sender == owner) { TokenInterface(WETH_ADDRESS).deposit.value(address(this).balance)(); } } } contract AaveImportTaker is DydxFlashLoanBase, ProxyPermission { address public constant WETH_ADDR = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address payable public constant AAVE_IMPORT = 0x44e4EF23b4794699D0625657cADcB96e07820fFe; address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; address public constant PROXY_REGISTRY_ADDRESS = 0x4678f0a6958e4D2Bc4F1BAF7Bc52E8F3564f3fE4; /// @notice Starts the process to move users position 1 collateral and 1 borrow /// @dev User must send 2 wei with this transaction /// @dev User must approve AaveImport to pull _aCollateralToken /// @param _collateralToken Collateral token we are moving to DSProxy /// @param _borrowToken Borrow token we are moving to DSProxy /// @param _ethAmount ETH amount that needs to be pulled from dydx function importLoan(address _collateralToken, address _borrowToken, uint _ethAmount) public { ISoloMargin solo = ISoloMargin(SOLO_MARGIN_ADDRESS); // Get marketId from token address uint256 marketId = _getMarketIdFromTokenAddress(WETH_ADDR); // Calculate repay amount (_amount + (2 wei)) // Approve transfer from uint256 repayAmount = _getRepaymentAmountInternal(_ethAmount); ERC20(WETH_ADDR).approve(SOLO_MARGIN_ADDRESS, repayAmount); Actions.ActionArgs[] memory operations = new Actions.ActionArgs[](3); operations[0] = _getWithdrawAction(marketId, _ethAmount, AAVE_IMPORT); operations[1] = _getCallAction( abi.encode(_collateralToken, _borrowToken, _ethAmount, msg.sender, address(this)), AAVE_IMPORT ); operations[2] = _getDepositAction(marketId, repayAmount, address(this)); Account.Info[] memory accountInfos = new Account.Info[](1); accountInfos[0] = _getAccountInfo(); givePermission(AAVE_IMPORT); solo.operate(accountInfos, operations); removePermission(AAVE_IMPORT); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "AaveImport", abi.encode(_collateralToken, _borrowToken)); } } contract CompoundBasicProxy is GasBurner { address public constant ETH_ADDR = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant COMPTROLLER_ADDR = 0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B; using SafeERC20 for ERC20; /// @notice User deposits tokens to the Compound protocol /// @dev User needs to approve the DSProxy to pull the _tokenAddr tokens /// @param _tokenAddr The address of the token to be deposited /// @param _cTokenAddr CTokens to be deposited /// @param _amount Amount of tokens to be deposited /// @param _inMarket True if the token is already in market for that address function deposit(address _tokenAddr, address _cTokenAddr, uint _amount, bool _inMarket) public burnGas(5) payable { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(this), _amount); } approveToken(_tokenAddr, _cTokenAddr); if (!_inMarket) { enterMarket(_cTokenAddr); } if (_tokenAddr != ETH_ADDR) { require(CTokenInterface(_cTokenAddr).mint(_amount) == 0); } else { CEtherInterface(_cTokenAddr).mint{value: msg.value}(); // reverts on fail } } /// @notice User withdraws tokens to the Compound protocol /// @param _tokenAddr The address of the token to be withdrawn /// @param _cTokenAddr CTokens to be withdrawn /// @param _amount Amount of tokens to be withdrawn /// @param _isCAmount If true _amount is cTokens if falls _amount is underlying tokens function withdraw(address _tokenAddr, address _cTokenAddr, uint _amount, bool _isCAmount) public burnGas(5) { if (_isCAmount) { require(CTokenInterface(_cTokenAddr).redeem(_amount) == 0); } else { require(CTokenInterface(_cTokenAddr).redeemUnderlying(_amount) == 0); } // withdraw funds to msg.sender if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransfer(msg.sender, ERC20(_tokenAddr).balanceOf(address(this))); } else { msg.sender.transfer(address(this).balance); } } /// @notice User borrows tokens to the Compound protocol /// @param _tokenAddr The address of the token to be borrowed /// @param _cTokenAddr CTokens to be borrowed /// @param _amount Amount of tokens to be borrowed /// @param _inMarket True if the token is already in market for that address function borrow(address _tokenAddr, address _cTokenAddr, uint _amount, bool _inMarket) public burnGas(8) { if (!_inMarket) { enterMarket(_cTokenAddr); } require(CTokenInterface(_cTokenAddr).borrow(_amount) == 0); // withdraw funds to msg.sender if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransfer(msg.sender, ERC20(_tokenAddr).balanceOf(address(this))); } else { msg.sender.transfer(address(this).balance); } } /// @dev User needs to approve the DSProxy to pull the _tokenAddr tokens /// @notice User paybacks tokens to the Compound protocol /// @param _tokenAddr The address of the token to be paybacked /// @param _cTokenAddr CTokens to be paybacked /// @param _amount Amount of tokens to be payedback /// @param _wholeDebt If true the _amount will be set to the whole amount of the debt function payback(address _tokenAddr, address _cTokenAddr, uint _amount, bool _wholeDebt) public burnGas(5) payable { approveToken(_tokenAddr, _cTokenAddr); if (_wholeDebt) { _amount = CTokenInterface(_cTokenAddr).borrowBalanceCurrent(address(this)); } if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(this), _amount); require(CTokenInterface(_cTokenAddr).repayBorrow(_amount) == 0); } else { CEtherInterface(_cTokenAddr).repayBorrow{value: msg.value}(); msg.sender.transfer(address(this).balance); // send back the extra eth } } /// @notice Helper method to withdraw tokens from the DSProxy /// @param _tokenAddr Address of the token to be withdrawn function withdrawTokens(address _tokenAddr) public { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransfer(msg.sender, ERC20(_tokenAddr).balanceOf(address(this))); } else { msg.sender.transfer(address(this).balance); } } /// @notice Enters the Compound market so it can be deposited/borrowed /// @param _cTokenAddr CToken address of the token function enterMarket(address _cTokenAddr) public { address[] memory markets = new address[](1); markets[0] = _cTokenAddr; ComptrollerInterface(COMPTROLLER_ADDR).enterMarkets(markets); } /// @notice Exits the Compound market so it can't be deposited/borrowed /// @param _cTokenAddr CToken address of the token function exitMarket(address _cTokenAddr) public { ComptrollerInterface(COMPTROLLER_ADDR).exitMarket(_cTokenAddr); } /// @notice Approves CToken contract to pull underlying tokens from the DSProxy /// @param _tokenAddr Token we are trying to approve /// @param _cTokenAddr Address which will gain the approval function approveToken(address _tokenAddr, address _cTokenAddr) internal { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeApprove(_cTokenAddr, 0); ERC20(_tokenAddr).safeApprove(_cTokenAddr, uint(-1)); } } } contract CompoundSafetyRatio is Exponential, DSMath { // solhint-disable-next-line const-name-snakecase ComptrollerInterface public constant comp = ComptrollerInterface(0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B); /// @notice Calcualted the ratio of debt / adjusted collateral /// @param _user Address of the user function getSafetyRatio(address _user) public view returns (uint) { // For each asset the account is in address[] memory assets = comp.getAssetsIn(_user); address oracleAddr = comp.oracle(); uint sumCollateral = 0; uint sumBorrow = 0; for (uint i = 0; i < assets.length; i++) { address asset = assets[i]; (, uint cTokenBalance, uint borrowBalance, uint exchangeRateMantissa) = CTokenInterface(asset).getAccountSnapshot(_user); Exp memory oraclePrice; if (cTokenBalance != 0 || borrowBalance != 0) { oraclePrice = Exp({mantissa: CompoundOracleInterface(oracleAddr).getUnderlyingPrice(asset)}); } // Sum up collateral in Usd if (cTokenBalance != 0) { (, uint collFactorMantissa) = comp.markets(address(asset)); Exp memory collateralFactor = Exp({mantissa: collFactorMantissa}); Exp memory exchangeRate = Exp({mantissa: exchangeRateMantissa}); (, Exp memory tokensToUsd) = mulExp3(collateralFactor, exchangeRate, oraclePrice); (, sumCollateral) = mulScalarTruncateAddUInt(tokensToUsd, cTokenBalance, sumCollateral); } // Sum up debt in Usd if (borrowBalance != 0) { (, sumBorrow) = mulScalarTruncateAddUInt(oraclePrice, borrowBalance, sumBorrow); } } if (sumBorrow == 0) return uint(-1); uint borrowPowerUsed = (sumBorrow * 10**18) / sumCollateral; return wdiv(1e18, borrowPowerUsed); } } contract CompoundMonitor is AdminAuth, DSMath, CompoundSafetyRatio, GasBurner { using SafeERC20 for ERC20; enum Method { Boost, Repay } uint public REPAY_GAS_TOKEN = 20; uint public BOOST_GAS_TOKEN = 20; uint constant public MAX_GAS_PRICE = 500000000000; // 500 gwei uint public REPAY_GAS_COST = 2000000; uint public BOOST_GAS_COST = 2000000; address public constant GAS_TOKEN_INTERFACE_ADDRESS = 0x0000000000b3F879cb30FE243b4Dfee438691c04; address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; address public constant BOT_REGISTRY_ADDRESS = 0x637726f8b08a7ABE3aE3aCaB01A80E2d8ddeF77B; CompoundMonitorProxy public compoundMonitorProxy; CompoundSubscriptions public subscriptionsContract; address public compoundFlashLoanTakerAddress; DefisaverLogger public logger = DefisaverLogger(DEFISAVER_LOGGER); modifier onlyApproved() { require(BotRegistry(BOT_REGISTRY_ADDRESS).botList(msg.sender), "Not auth bot"); _; } /// @param _compoundMonitorProxy Proxy contracts that actually is authorized to call DSProxy /// @param _subscriptions Subscriptions contract for Compound positions /// @param _compoundFlashLoanTaker Contract that actually performs Repay/Boost constructor(address _compoundMonitorProxy, address _subscriptions, address _compoundFlashLoanTaker) public { compoundMonitorProxy = CompoundMonitorProxy(_compoundMonitorProxy); subscriptionsContract = CompoundSubscriptions(_subscriptions); compoundFlashLoanTakerAddress = _compoundFlashLoanTaker; } /// @notice Bots call this method to repay for user when conditions are met /// @dev If the contract ownes gas token it will try and use it for gas price reduction /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress, exchangeAddress] /// @param _user The actual address that owns the Compound position function repayFor( SaverExchangeCore.ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress address _user ) public payable onlyApproved burnGas(REPAY_GAS_TOKEN) { (bool isAllowed, uint ratioBefore) = canCall(Method.Repay, _user); require(isAllowed); // check if conditions are met uint256 gasCost = calcGasCost(REPAY_GAS_COST); compoundMonitorProxy.callExecute{value: msg.value}( _user, compoundFlashLoanTakerAddress, abi.encodeWithSignature( "repayWithLoan((address,address,uint256,uint256,uint256,address,address,bytes,uint256),address[2],uint256)", _exData, _cAddresses, gasCost ) ); (bool isGoodRatio, uint ratioAfter) = ratioGoodAfter(Method.Repay, _user); require(isGoodRatio); // check if the after result of the actions is good returnEth(); logger.Log(address(this), _user, "AutomaticCompoundRepay", abi.encode(ratioBefore, ratioAfter)); } /// @notice Bots call this method to boost for user when conditions are met /// @dev If the contract ownes gas token it will try and use it for gas price reduction /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress, exchangeAddress] /// @param _user The actual address that owns the Compound position function boostFor( SaverExchangeCore.ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress address _user ) public payable onlyApproved burnGas(BOOST_GAS_TOKEN) { (bool isAllowed, uint ratioBefore) = canCall(Method.Boost, _user); require(isAllowed); // check if conditions are met uint256 gasCost = calcGasCost(BOOST_GAS_COST); compoundMonitorProxy.callExecute{value: msg.value}( _user, compoundFlashLoanTakerAddress, abi.encodeWithSignature( "boostWithLoan((address,address,uint256,uint256,uint256,address,address,bytes,uint256),address[2],uint256)", _exData, _cAddresses, gasCost ) ); (bool isGoodRatio, uint ratioAfter) = ratioGoodAfter(Method.Boost, _user); require(isGoodRatio); // check if the after result of the actions is good returnEth(); logger.Log(address(this), _user, "AutomaticCompoundBoost", abi.encode(ratioBefore, ratioAfter)); } /******************* INTERNAL METHODS ********************************/ function returnEth() internal { // return if some eth left if (address(this).balance > 0) { msg.sender.transfer(address(this).balance); } } /******************* STATIC METHODS ********************************/ /// @notice Checks if Boost/Repay could be triggered for the CDP /// @dev Called by MCDMonitor to enforce the min/max check /// @param _method Type of action to be called /// @param _user The actual address that owns the Compound position /// @return Boolean if it can be called and the ratio function canCall(Method _method, address _user) public view returns(bool, uint) { bool subscribed = subscriptionsContract.isSubscribed(_user); CompoundSubscriptions.CompoundHolder memory holder = subscriptionsContract.getHolder(_user); // check if cdp is subscribed if (!subscribed) return (false, 0); // check if boost and boost allowed if (_method == Method.Boost && !holder.boostEnabled) return (false, 0); uint currRatio = getSafetyRatio(_user); if (_method == Method.Repay) { return (currRatio < holder.minRatio, currRatio); } else if (_method == Method.Boost) { return (currRatio > holder.maxRatio, currRatio); } } /// @dev After the Boost/Repay check if the ratio doesn't trigger another call /// @param _method Type of action to be called /// @param _user The actual address that owns the Compound position /// @return Boolean if the recent action preformed correctly and the ratio function ratioGoodAfter(Method _method, address _user) public view returns(bool, uint) { CompoundSubscriptions.CompoundHolder memory holder; holder= subscriptionsContract.getHolder(_user); uint currRatio = getSafetyRatio(_user); if (_method == Method.Repay) { return (currRatio < holder.maxRatio, currRatio); } else if (_method == Method.Boost) { return (currRatio > holder.minRatio, currRatio); } } /// @notice Calculates gas cost (in Eth) of tx /// @dev Gas price is limited to MAX_GAS_PRICE to prevent attack of draining user CDP /// @param _gasAmount Amount of gas used for the tx function calcGasCost(uint _gasAmount) public view returns (uint) { uint gasPrice = tx.gasprice <= MAX_GAS_PRICE ? tx.gasprice : MAX_GAS_PRICE; return mul(gasPrice, _gasAmount); } /******************* OWNER ONLY OPERATIONS ********************************/ /// @notice Allows owner to change gas cost for boost operation, but only up to 3 millions /// @param _gasCost New gas cost for boost method function changeBoostGasCost(uint _gasCost) public onlyOwner { require(_gasCost < 3000000); BOOST_GAS_COST = _gasCost; } /// @notice Allows owner to change gas cost for repay operation, but only up to 3 millions /// @param _gasCost New gas cost for repay method function changeRepayGasCost(uint _gasCost) public onlyOwner { require(_gasCost < 3000000); REPAY_GAS_COST = _gasCost; } /// @notice If any tokens gets stuck in the contract owner can withdraw it /// @param _tokenAddress Address of the ERC20 token /// @param _to Address of the receiver /// @param _amount The amount to be sent function transferERC20(address _tokenAddress, address _to, uint _amount) public onlyOwner { ERC20(_tokenAddress).safeTransfer(_to, _amount); } /// @notice If any Eth gets stuck in the contract owner can withdraw it /// @param _to Address of the receiver /// @param _amount The amount to be sent function transferEth(address payable _to, uint _amount) public onlyOwner { _to.transfer(_amount); } } contract CompoundSaverHelper is DSMath, Exponential { using SafeERC20 for ERC20; address payable public constant WALLET_ADDR = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; address public constant DISCOUNT_ADDR = 0x1b14E8D511c9A4395425314f849bD737BAF8208F; uint public constant MANUAL_SERVICE_FEE = 400; // 0.25% Fee uint public constant AUTOMATIC_SERVICE_FEE = 333; // 0.3% Fee address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant CETH_ADDRESS = 0x4Ddc2D193948926D02f9B1fE9e1daa0718270ED5; address public constant COMPTROLLER = 0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B; address public constant COMPOUND_LOGGER = 0x3DD0CDf5fFA28C6847B4B276e2fD256046a44bb7; address public constant BOT_REGISTRY_ADDRESS = 0x637726f8b08a7ABE3aE3aCaB01A80E2d8ddeF77B; /// @notice Helper method to payback the Compound debt /// @dev If amount is bigger it will repay the whole debt and send the extra to the _user /// @param _amount Amount of tokens we want to repay /// @param _cBorrowToken Ctoken address we are repaying /// @param _borrowToken Token address we are repaying /// @param _user Owner of the compound position we are paying back function paybackDebt(uint _amount, address _cBorrowToken, address _borrowToken, address payable _user) internal { uint wholeDebt = CTokenInterface(_cBorrowToken).borrowBalanceCurrent(address(this)); if (_amount > wholeDebt) { if (_borrowToken == ETH_ADDRESS) { _user.transfer((_amount - wholeDebt)); } else { ERC20(_borrowToken).safeTransfer(_user, (_amount - wholeDebt)); } _amount = wholeDebt; } approveCToken(_borrowToken, _cBorrowToken); if (_borrowToken == ETH_ADDRESS) { CEtherInterface(_cBorrowToken).repayBorrow{value: _amount}(); } else { require(CTokenInterface(_cBorrowToken).repayBorrow(_amount) == 0); } } /// @notice Calculates the fee amount /// @param _amount Amount that is converted /// @param _user Actuall user addr not DSProxy /// @param _gasCost Ether amount of gas we are spending for tx /// @param _cTokenAddr CToken addr. of token we are getting for the fee /// @return feeAmount The amount we took for the fee function getFee(uint _amount, address _user, uint _gasCost, address _cTokenAddr) internal returns (uint feeAmount) { uint fee = MANUAL_SERVICE_FEE; if (BotRegistry(BOT_REGISTRY_ADDRESS).botList(tx.origin)) { fee = AUTOMATIC_SERVICE_FEE; } address tokenAddr = getUnderlyingAddr(_cTokenAddr); if (Discount(DISCOUNT_ADDR).isCustomFeeSet(_user)) { fee = Discount(DISCOUNT_ADDR).getCustomServiceFee(_user); } feeAmount = (fee == 0) ? 0 : (_amount / fee); if (_gasCost != 0) { address oracle = ComptrollerInterface(COMPTROLLER).oracle(); uint usdTokenPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(_cTokenAddr); uint ethPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(CETH_ADDRESS); uint tokenPriceInEth = wdiv(usdTokenPrice, ethPrice); _gasCost = wdiv(_gasCost, tokenPriceInEth); feeAmount = add(feeAmount, _gasCost); } // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } if (tokenAddr == ETH_ADDRESS) { WALLET_ADDR.transfer(feeAmount); } else { ERC20(tokenAddr).safeTransfer(WALLET_ADDR, feeAmount); } } /// @notice Calculates the gas cost of transaction and send it to wallet /// @param _amount Amount that is converted /// @param _gasCost Ether amount of gas we are spending for tx /// @param _cTokenAddr CToken addr. of token we are getting for the fee /// @return feeAmount The amount we took for the fee function getGasCost(uint _amount, uint _gasCost, address _cTokenAddr) internal returns (uint feeAmount) { address tokenAddr = getUnderlyingAddr(_cTokenAddr); if (_gasCost != 0) { address oracle = ComptrollerInterface(COMPTROLLER).oracle(); uint usdTokenPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(_cTokenAddr); uint ethPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(CETH_ADDRESS); uint tokenPriceInEth = wdiv(usdTokenPrice, ethPrice); feeAmount = wdiv(_gasCost, tokenPriceInEth); } // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } if (tokenAddr == ETH_ADDRESS) { WALLET_ADDR.transfer(feeAmount); } else { ERC20(tokenAddr).safeTransfer(WALLET_ADDR, feeAmount); } } /// @notice Enters the market for the collatera and borrow tokens /// @param _cTokenAddrColl Collateral address we are entering the market in /// @param _cTokenAddrBorrow Borrow address we are entering the market in function enterMarket(address _cTokenAddrColl, address _cTokenAddrBorrow) internal { address[] memory markets = new address[](2); markets[0] = _cTokenAddrColl; markets[1] = _cTokenAddrBorrow; ComptrollerInterface(COMPTROLLER).enterMarkets(markets); } /// @notice Approves CToken contract to pull underlying tokens from the DSProxy /// @param _tokenAddr Token we are trying to approve /// @param _cTokenAddr Address which will gain the approval function approveCToken(address _tokenAddr, address _cTokenAddr) internal { if (_tokenAddr != ETH_ADDRESS) { ERC20(_tokenAddr).safeApprove(_cTokenAddr, 0); ERC20(_tokenAddr).safeApprove(_cTokenAddr, uint(-1)); } } /// @notice Returns the underlying address of the cToken asset /// @param _cTokenAddress cToken address /// @return Token address of the cToken specified function getUnderlyingAddr(address _cTokenAddress) internal returns (address) { if (_cTokenAddress == CETH_ADDRESS) { return ETH_ADDRESS; } else { return CTokenInterface(_cTokenAddress).underlying(); } } /// @notice Returns the owner of the DSProxy that called the contract function getUserAddress() internal view returns (address) { DSProxy proxy = DSProxy(uint160(address(this))); return proxy.owner(); } /// @notice Returns the maximum amount of collateral available to withdraw /// @dev Due to rounding errors the result is - 1% wei from the exact amount /// @param _cCollAddress Collateral we are getting the max value of /// @param _account Users account /// @return Returns the max. collateral amount in that token function getMaxCollateral(address _cCollAddress, address _account) public returns (uint) { (, uint liquidityInUsd, ) = ComptrollerInterface(COMPTROLLER).getAccountLiquidity(_account); uint usersBalance = CTokenInterface(_cCollAddress).balanceOfUnderlying(_account); address oracle = ComptrollerInterface(COMPTROLLER).oracle(); if (liquidityInUsd == 0) return usersBalance; CTokenInterface(_cCollAddress).accrueInterest(); (, uint collFactorMantissa) = ComptrollerInterface(COMPTROLLER).markets(_cCollAddress); Exp memory collateralFactor = Exp({mantissa: collFactorMantissa}); (, uint tokensToUsd) = divScalarByExpTruncate(liquidityInUsd, collateralFactor); uint usdPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(_cCollAddress); uint liqInToken = wdiv(tokensToUsd, usdPrice); if (liqInToken > usersBalance) return usersBalance; return sub(liqInToken, (liqInToken / 100)); // cut off 1% due to rounding issues } /// @notice Returns the maximum amount of borrow amount available /// @dev Due to rounding errors the result is - 1% wei from the exact amount /// @param _cBorrowAddress Borrow token we are getting the max value of /// @param _account Users account /// @return Returns the max. borrow amount in that token function getMaxBorrow(address _cBorrowAddress, address _account) public returns (uint) { (, uint liquidityInUsd, ) = ComptrollerInterface(COMPTROLLER).getAccountLiquidity(_account); address oracle = ComptrollerInterface(COMPTROLLER).oracle(); CTokenInterface(_cBorrowAddress).accrueInterest(); uint usdPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(_cBorrowAddress); uint liquidityInToken = wdiv(liquidityInUsd, usdPrice); return sub(liquidityInToken, (liquidityInToken / 100)); // cut off 1% due to rounding issues } } contract CompoundImportFlashLoan is FlashLoanReceiverBase { using SafeERC20 for ERC20; ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); address public constant COMPOUND_BORROW_PROXY = 0xb7EDC39bE76107e2Cc645f0f6a3D164f5e173Ee2; address public owner; constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public { owner = msg.sender; } /// @notice Called by Aave when sending back the FL amount /// @param _reserve The address of the borrowed token /// @param _amount Amount of FL tokens received /// @param _fee FL Aave fee /// @param _params The params that are sent from the original FL caller contract function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { ( address cCollateralToken, address cBorrowToken, address user, address proxy ) = abi.decode(_params, (address,address,address,address)); // approve FL tokens so we can repay them ERC20(_reserve).safeApprove(cBorrowToken, 0); ERC20(_reserve).safeApprove(cBorrowToken, uint(-1)); // repay compound debt require(CTokenInterface(cBorrowToken).repayBorrowBehalf(user, uint(-1)) == 0, "Repay borrow behalf fail"); // transfer cTokens to proxy uint cTokenBalance = CTokenInterface(cCollateralToken).balanceOf(user); require(CTokenInterface(cCollateralToken).transferFrom(user, proxy, cTokenBalance)); // borrow bytes memory proxyData = getProxyData(cCollateralToken, cBorrowToken, _reserve, (_amount + _fee)); DSProxyInterface(proxy).execute(COMPOUND_BORROW_PROXY, proxyData); // Repay the loan with the money DSProxy sent back transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); } /// @notice Formats function data call so we can call it through DSProxy /// @param _cCollToken CToken address of collateral /// @param _cBorrowToken CToken address we will borrow /// @param _borrowToken Token address we will borrow /// @param _amount Amount that will be borrowed /// @return proxyData Formated function call data function getProxyData(address _cCollToken, address _cBorrowToken, address _borrowToken, uint _amount) internal pure returns (bytes memory proxyData) { proxyData = abi.encodeWithSignature( "borrow(address,address,address,uint256)", _cCollToken, _cBorrowToken, _borrowToken, _amount); } function withdrawStuckFunds(address _tokenAddr, uint _amount) public { require(owner == msg.sender, "Must be owner"); if (_tokenAddr == 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE) { msg.sender.transfer(_amount); } else { ERC20(_tokenAddr).safeTransfer(owner, _amount); } } } contract CompoundImportTaker is CompoundSaverHelper, ProxyPermission, GasBurner { ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); address payable public constant COMPOUND_IMPORT_FLASH_LOAN = 0x0a9238e14d5A20CDb03811B12D1984587C3CE9a0; address public constant PROXY_REGISTRY_ADDRESS = 0x4678f0a6958e4D2Bc4F1BAF7Bc52E8F3564f3fE4; DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); /// @notice Starts the process to move users position 1 collateral and 1 borrow /// @dev User must approve COMPOUND_IMPORT_FLASH_LOAN to pull _cCollateralToken /// @param _cCollateralToken Collateral we are moving to DSProxy /// @param _cBorrowToken Borrow token we are moving to DSProxy function importLoan(address _cCollateralToken, address _cBorrowToken) external burnGas(20) { address proxy = getProxy(); uint loanAmount = CTokenInterface(_cBorrowToken).borrowBalanceCurrent(msg.sender); bytes memory paramsData = abi.encode(_cCollateralToken, _cBorrowToken, msg.sender, proxy); givePermission(COMPOUND_IMPORT_FLASH_LOAN); lendingPool.flashLoan(COMPOUND_IMPORT_FLASH_LOAN, getUnderlyingAddr(_cBorrowToken), loanAmount, paramsData); removePermission(COMPOUND_IMPORT_FLASH_LOAN); logger.Log(address(this), msg.sender, "CompoundImport", abi.encode(loanAmount, 0, _cCollateralToken)); } /// @notice Gets proxy address, if user doesn't has DSProxy build it /// @return proxy DsProxy address function getProxy() internal returns (address proxy) { proxy = ProxyRegistryInterface(PROXY_REGISTRY_ADDRESS).proxies(msg.sender); if (proxy == address(0)) { proxy = ProxyRegistryInterface(PROXY_REGISTRY_ADDRESS).build(msg.sender); } } } contract SaverExchangeCore is SaverExchangeHelper, DSMath { // first is empty to keep the legacy order in place enum ExchangeType { _, OASIS, KYBER, UNISWAP, ZEROX } enum ActionType { SELL, BUY } struct ExchangeData { address srcAddr; address destAddr; uint srcAmount; uint destAmount; uint minPrice; address wrapper; address exchangeAddr; bytes callData; uint256 price0x; } /// @notice Internal method that preforms a sell on 0x/on-chain /// @dev Usefull for other DFS contract to integrate for exchanging /// @param exData Exchange data struct /// @return (address, uint) Address of the wrapper used and destAmount function _sell(ExchangeData memory exData) internal returns (address, uint) { address wrapper; uint swapedTokens; bool success; uint tokensLeft = exData.srcAmount; // if selling eth, convert to weth if (exData.srcAddr == KYBER_ETH_ADDRESS) { exData.srcAddr = ethToWethAddr(exData.srcAddr); TokenInterface(WETH_ADDRESS).deposit.value(exData.srcAmount)(); } // Try 0x first and then fallback on specific wrapper if (exData.price0x > 0) { approve0xProxy(exData.srcAddr, exData.srcAmount); uint ethAmount = getProtocolFee(exData.srcAddr, msg.value, exData.srcAmount); (success, swapedTokens, tokensLeft) = takeOrder(exData, ethAmount, ActionType.SELL); if (success) { wrapper = exData.exchangeAddr; } } // fallback to desired wrapper if 0x failed if (!success) { swapedTokens = saverSwap(exData, ActionType.SELL); wrapper = exData.wrapper; } require(getBalance(exData.destAddr) >= wmul(exData.minPrice, exData.srcAmount), "Final amount isn't correct"); // if anything is left in weth, pull it to user as eth if (getBalance(WETH_ADDRESS) > 0) { TokenInterface(WETH_ADDRESS).withdraw( TokenInterface(WETH_ADDRESS).balanceOf(address(this)) ); } return (wrapper, swapedTokens); } /// @notice Internal method that preforms a buy on 0x/on-chain /// @dev Usefull for other DFS contract to integrate for exchanging /// @param exData Exchange data struct /// @return (address, uint) Address of the wrapper used and srcAmount function _buy(ExchangeData memory exData) internal returns (address, uint) { address wrapper; uint swapedTokens; bool success; require(exData.destAmount != 0, "Dest amount must be specified"); // if selling eth, convert to weth if (exData.srcAddr == KYBER_ETH_ADDRESS) { exData.srcAddr = ethToWethAddr(exData.srcAddr); TokenInterface(WETH_ADDRESS).deposit.value(exData.srcAmount)(); } if (exData.price0x > 0) { approve0xProxy(exData.srcAddr, exData.srcAmount); uint ethAmount = getProtocolFee(exData.srcAddr, msg.value, exData.srcAmount); (success, swapedTokens,) = takeOrder(exData, ethAmount, ActionType.BUY); if (success) { wrapper = exData.exchangeAddr; } } // fallback to desired wrapper if 0x failed if (!success) { swapedTokens = saverSwap(exData, ActionType.BUY); wrapper = exData.wrapper; } require(swapedTokens >= exData.destAmount, "Final amount isn't correct"); // if anything is left in weth, pull it to user as eth if (getBalance(WETH_ADDRESS) > 0) { TokenInterface(WETH_ADDRESS).withdraw( TokenInterface(WETH_ADDRESS).balanceOf(address(this)) ); } return (wrapper, getBalance(exData.destAddr)); } /// @notice Takes order from 0x and returns bool indicating if it is successful /// @param _exData Exchange data /// @param _ethAmount Ether fee needed for 0x order function takeOrder( ExchangeData memory _exData, uint256 _ethAmount, ActionType _type ) private returns (bool success, uint256, uint256) { // write in the exact amount we are selling/buing in an order if (_type == ActionType.SELL) { writeUint256(_exData.callData, 36, _exData.srcAmount); } else { writeUint256(_exData.callData, 36, _exData.destAmount); } if (ZrxAllowlist(ZRX_ALLOWLIST_ADDR).isNonPayableAddr(_exData.exchangeAddr)) { _ethAmount = 0; } uint256 tokensBefore = getBalance(_exData.destAddr); if (ZrxAllowlist(ZRX_ALLOWLIST_ADDR).isZrxAddr(_exData.exchangeAddr)) { (success, ) = _exData.exchangeAddr.call{value: _ethAmount}(_exData.callData); } else { success = false; } uint256 tokensSwaped = 0; uint256 tokensLeft = _exData.srcAmount; if (success) { // check to see if any _src tokens are left over after exchange tokensLeft = getBalance(_exData.srcAddr); // convert weth -> eth if needed if (_exData.destAddr == KYBER_ETH_ADDRESS) { TokenInterface(WETH_ADDRESS).withdraw( TokenInterface(WETH_ADDRESS).balanceOf(address(this)) ); } // get the current balance of the swaped tokens tokensSwaped = getBalance(_exData.destAddr) - tokensBefore; } return (success, tokensSwaped, tokensLeft); } /// @notice Calls wraper contract for exchage to preform an on-chain swap /// @param _exData Exchange data struct /// @param _type Type of action SELL|BUY /// @return swapedTokens For Sell that the destAmount, for Buy thats the srcAmount function saverSwap(ExchangeData memory _exData, ActionType _type) internal returns (uint swapedTokens) { require(SaverExchangeRegistry(SAVER_EXCHANGE_REGISTRY).isWrapper(_exData.wrapper), "Wrapper is not valid"); uint ethValue = 0; ERC20(_exData.srcAddr).safeTransfer(_exData.wrapper, _exData.srcAmount); if (_type == ActionType.SELL) { swapedTokens = ExchangeInterfaceV2(_exData.wrapper). sell{value: ethValue}(_exData.srcAddr, _exData.destAddr, _exData.srcAmount); } else { swapedTokens = ExchangeInterfaceV2(_exData.wrapper). buy{value: ethValue}(_exData.srcAddr, _exData.destAddr, _exData.destAmount); } } function writeUint256(bytes memory _b, uint256 _index, uint _input) internal pure { if (_b.length < _index + 32) { revert("Incorrent lengt while writting bytes32"); } bytes32 input = bytes32(_input); _index += 32; // Read the bytes32 from array memory assembly { mstore(add(_b, _index), input) } } /// @notice Converts Kybers Eth address -> Weth /// @param _src Input address function ethToWethAddr(address _src) internal pure returns (address) { return _src == KYBER_ETH_ADDRESS ? WETH_ADDRESS : _src; } /// @notice Calculates protocol fee /// @param _srcAddr selling token address (if eth should be WETH) /// @param _msgValue msg.value in transaction /// @param _srcAmount amount we are selling function getProtocolFee(address _srcAddr, uint256 _msgValue, uint256 _srcAmount) internal returns(uint256) { // if we are not selling ETH msg value is always the protocol fee if (_srcAddr != WETH_ADDRESS) return _msgValue; // if msg value is larger than srcAmount, that means that msg value is protocol fee + srcAmount, so we subsctract srcAmount from msg value // we have an edge case here when protocol fee is higher than selling amount if (_msgValue > _srcAmount) return _msgValue - _srcAmount; // if msg value is lower than src amount, that means that srcAmount isn't included in msg value, so we return msg value return _msgValue; } function packExchangeData(ExchangeData memory _exData) public pure returns(bytes memory) { // splitting in two different bytes and encoding all because of stack too deep in decoding part bytes memory part1 = abi.encode( _exData.srcAddr, _exData.destAddr, _exData.srcAmount, _exData.destAmount ); bytes memory part2 = abi.encode( _exData.minPrice, _exData.wrapper, _exData.exchangeAddr, _exData.callData, _exData.price0x ); return abi.encode(part1, part2); } function unpackExchangeData(bytes memory _data) public pure returns(ExchangeData memory _exData) { ( bytes memory part1, bytes memory part2 ) = abi.decode(_data, (bytes,bytes)); ( _exData.srcAddr, _exData.destAddr, _exData.srcAmount, _exData.destAmount ) = abi.decode(part1, (address,address,uint256,uint256)); ( _exData.minPrice, _exData.wrapper, _exData.exchangeAddr, _exData.callData, _exData.price0x ) = abi.decode(part2, (uint256,address,address,bytes,uint256)); } // solhint-disable-next-line no-empty-blocks receive() external virtual payable {} } contract KyberWrapper is DSMath, ExchangeInterfaceV2, AdminAuth { address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant KYBER_INTERFACE = 0x9AAb3f75489902f3a48495025729a0AF77d4b11e; address payable public constant WALLET_ID = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; using SafeERC20 for ERC20; /// @notice Sells a _srcAmount of tokens at Kyber /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Destination amount function sell(address _srcAddr, address _destAddr, uint _srcAmount) external override payable returns (uint) { ERC20 srcToken = ERC20(_srcAddr); ERC20 destToken = ERC20(_destAddr); KyberNetworkProxyInterface kyberNetworkProxy = KyberNetworkProxyInterface(KYBER_INTERFACE); if (_srcAddr != KYBER_ETH_ADDRESS) { srcToken.safeApprove(address(kyberNetworkProxy), _srcAmount); } uint destAmount = kyberNetworkProxy.trade{value: msg.value}( srcToken, _srcAmount, destToken, msg.sender, uint(-1), 0, WALLET_ID ); return destAmount; } /// @notice Buys a _destAmount of tokens at Kyber /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint srcAmount function buy(address _srcAddr, address _destAddr, uint _destAmount) external override payable returns(uint) { ERC20 srcToken = ERC20(_srcAddr); ERC20 destToken = ERC20(_destAddr); uint srcAmount = 0; if (_srcAddr != KYBER_ETH_ADDRESS) { srcAmount = srcToken.balanceOf(address(this)); } else { srcAmount = msg.value; } KyberNetworkProxyInterface kyberNetworkProxy = KyberNetworkProxyInterface(KYBER_INTERFACE); if (_srcAddr != KYBER_ETH_ADDRESS) { srcToken.safeApprove(address(kyberNetworkProxy), srcAmount); } uint destAmount = kyberNetworkProxy.trade{value: msg.value}( srcToken, srcAmount, destToken, msg.sender, _destAmount, 0, WALLET_ID ); require(destAmount == _destAmount, "Wrong dest amount"); uint srcAmountAfter = 0; if (_srcAddr != KYBER_ETH_ADDRESS) { srcAmountAfter = srcToken.balanceOf(address(this)); } else { srcAmountAfter = address(this).balance; } // Send the leftover from the source token back sendLeftOver(_srcAddr); return (srcAmount - srcAmountAfter); } /// @notice Return a rate for which we can sell an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return rate Rate function getSellRate(address _srcAddr, address _destAddr, uint _srcAmount) public override view returns (uint rate) { (rate, ) = KyberNetworkProxyInterface(KYBER_INTERFACE) .getExpectedRate(ERC20(_srcAddr), ERC20(_destAddr), _srcAmount); // multiply with decimal difference in src token rate = rate * (10**(18 - getDecimals(_srcAddr))); // divide with decimal difference in dest token rate = rate / (10**(18 - getDecimals(_destAddr))); } /// @notice Return a rate for which we can buy an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return rate Rate function getBuyRate(address _srcAddr, address _destAddr, uint _destAmount) public override view returns (uint rate) { uint256 srcRate = getSellRate(_destAddr, _srcAddr, _destAmount); uint256 srcAmount = wmul(srcRate, _destAmount); rate = getSellRate(_srcAddr, _destAddr, srcAmount); // increase rate by 3% too account for inaccuracy between sell/buy conversion rate = rate + (rate / 30); } /// @notice Send any leftover tokens, we use to clear out srcTokens after buy /// @param _srcAddr Source token address function sendLeftOver(address _srcAddr) internal { msg.sender.transfer(address(this).balance); if (_srcAddr != KYBER_ETH_ADDRESS) { ERC20(_srcAddr).safeTransfer(msg.sender, ERC20(_srcAddr).balanceOf(address(this))); } } receive() payable external {} function getDecimals(address _token) internal view returns (uint256) { if (_token == KYBER_ETH_ADDRESS) return 18; return ERC20(_token).decimals(); } } contract OasisTradeWrapper is DSMath, ExchangeInterfaceV2, AdminAuth { using SafeERC20 for ERC20; address public constant OTC_ADDRESS = 0x794e6e91555438aFc3ccF1c5076A74F42133d08D; address public constant WETH_ADDRESS = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; /// @notice Sells a _srcAmount of tokens at Oasis /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Destination amount function sell(address _srcAddr, address _destAddr, uint _srcAmount) external override payable returns (uint) { address srcAddr = ethToWethAddr(_srcAddr); address destAddr = ethToWethAddr(_destAddr); ERC20(srcAddr).safeApprove(OTC_ADDRESS, _srcAmount); uint destAmount = OasisInterface(OTC_ADDRESS).sellAllAmount(srcAddr, _srcAmount, destAddr, 0); // convert weth -> eth and send back if (destAddr == WETH_ADDRESS) { TokenInterface(WETH_ADDRESS).withdraw(destAmount); msg.sender.transfer(destAmount); } else { ERC20(destAddr).safeTransfer(msg.sender, destAmount); } return destAmount; } /// @notice Buys a _destAmount of tokens at Oasis /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint srcAmount function buy(address _srcAddr, address _destAddr, uint _destAmount) external override payable returns(uint) { address srcAddr = ethToWethAddr(_srcAddr); address destAddr = ethToWethAddr(_destAddr); ERC20(srcAddr).safeApprove(OTC_ADDRESS, uint(-1)); uint srcAmount = OasisInterface(OTC_ADDRESS).buyAllAmount(destAddr, _destAmount, srcAddr, uint(-1)); // convert weth -> eth and send back if (destAddr == WETH_ADDRESS) { TokenInterface(WETH_ADDRESS).withdraw(_destAmount); msg.sender.transfer(_destAmount); } else { ERC20(destAddr).safeTransfer(msg.sender, _destAmount); } // Send the leftover from the source token back sendLeftOver(srcAddr); return srcAmount; } /// @notice Return a rate for which we can sell an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Rate function getSellRate(address _srcAddr, address _destAddr, uint _srcAmount) public override view returns (uint) { address srcAddr = ethToWethAddr(_srcAddr); address destAddr = ethToWethAddr(_destAddr); return wdiv(OasisInterface(OTC_ADDRESS).getBuyAmount(destAddr, srcAddr, _srcAmount), _srcAmount); } /// @notice Return a rate for which we can buy an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint Rate function getBuyRate(address _srcAddr, address _destAddr, uint _destAmount) public override view returns (uint) { address srcAddr = ethToWethAddr(_srcAddr); address destAddr = ethToWethAddr(_destAddr); return wdiv(1 ether, wdiv(OasisInterface(OTC_ADDRESS).getPayAmount(srcAddr, destAddr, _destAmount), _destAmount)); } /// @notice Send any leftover tokens, we use to clear out srcTokens after buy /// @param _srcAddr Source token address function sendLeftOver(address _srcAddr) internal { msg.sender.transfer(address(this).balance); if (_srcAddr != KYBER_ETH_ADDRESS) { ERC20(_srcAddr).safeTransfer(msg.sender, ERC20(_srcAddr).balanceOf(address(this))); } } /// @notice Converts Kybers Eth address -> Weth /// @param _src Input address function ethToWethAddr(address _src) internal pure returns (address) { return _src == KYBER_ETH_ADDRESS ? WETH_ADDRESS : _src; } receive() payable external {} } contract UniswapV2Wrapper is DSMath, ExchangeInterfaceV2, AdminAuth { address public constant WETH_ADDRESS = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; UniswapRouterInterface public constant router = UniswapRouterInterface(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D); using SafeERC20 for ERC20; /// @notice Sells a _srcAmount of tokens at UniswapV2 /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Destination amount function sell(address _srcAddr, address _destAddr, uint _srcAmount) external payable override returns (uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); uint[] memory amounts; address[] memory path = new address[](2); path[0] = _srcAddr; path[1] = _destAddr; ERC20(_srcAddr).safeApprove(address(router), _srcAmount); // if we are buying ether if (_destAddr == WETH_ADDRESS) { amounts = router.swapExactTokensForETH(_srcAmount, 1, path, msg.sender, block.timestamp + 1); } // if we are selling token to token else { amounts = router.swapExactTokensForTokens(_srcAmount, 1, path, msg.sender, block.timestamp + 1); } return amounts[amounts.length - 1]; } /// @notice Buys a _destAmount of tokens at UniswapV2 /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint srcAmount function buy(address _srcAddr, address _destAddr, uint _destAmount) external override payable returns(uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); uint[] memory amounts; address[] memory path = new address[](2); path[0] = _srcAddr; path[1] = _destAddr; ERC20(_srcAddr).safeApprove(address(router), uint(-1)); // if we are buying ether if (_destAddr == WETH_ADDRESS) { amounts = router.swapTokensForExactETH(_destAmount, uint(-1), path, msg.sender, block.timestamp + 1); } // if we are buying token to token else { amounts = router.swapTokensForExactTokens(_destAmount, uint(-1), path, msg.sender, block.timestamp + 1); } // Send the leftover from the source token back sendLeftOver(_srcAddr); return amounts[0]; } /// @notice Return a rate for which we can sell an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Rate function getSellRate(address _srcAddr, address _destAddr, uint _srcAmount) public override view returns (uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); address[] memory path = new address[](2); path[0] = _srcAddr; path[1] = _destAddr; uint[] memory amounts = router.getAmountsOut(_srcAmount, path); return wdiv(amounts[amounts.length - 1], _srcAmount); } /// @notice Return a rate for which we can buy an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint Rate function getBuyRate(address _srcAddr, address _destAddr, uint _destAmount) public override view returns (uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); address[] memory path = new address[](2); path[0] = _srcAddr; path[1] = _destAddr; uint[] memory amounts = router.getAmountsIn(_destAmount, path); return wdiv(_destAmount, amounts[0]); } /// @notice Send any leftover tokens, we use to clear out srcTokens after buy /// @param _srcAddr Source token address function sendLeftOver(address _srcAddr) internal { msg.sender.transfer(address(this).balance); if (_srcAddr != KYBER_ETH_ADDRESS) { ERC20(_srcAddr).safeTransfer(msg.sender, ERC20(_srcAddr).balanceOf(address(this))); } } /// @notice Converts Kybers Eth address -> Weth /// @param _src Input address function ethToWethAddr(address _src) internal pure returns (address) { return _src == KYBER_ETH_ADDRESS ? WETH_ADDRESS : _src; } function getDecimals(address _token) internal view returns (uint256) { if (_token == KYBER_ETH_ADDRESS) return 18; return ERC20(_token).decimals(); } receive() payable external {} } contract UniswapWrapper is DSMath, ExchangeInterfaceV2, AdminAuth { address public constant WETH_ADDRESS = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant UNISWAP_FACTORY = 0xc0a47dFe034B400B47bDaD5FecDa2621de6c4d95; using SafeERC20 for ERC20; /// @notice Sells a _srcAmount of tokens at Uniswap /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Destination amount function sell(address _srcAddr, address _destAddr, uint _srcAmount) external payable override returns (uint) { address uniswapExchangeAddr; uint destAmount; _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); // if we are buying ether if (_destAddr == WETH_ADDRESS) { uniswapExchangeAddr = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr); ERC20(_srcAddr).safeApprove(uniswapExchangeAddr, _srcAmount); destAmount = UniswapExchangeInterface(uniswapExchangeAddr). tokenToEthTransferInput(_srcAmount, 1, block.timestamp + 1, msg.sender); } // if we are selling token to token else { uniswapExchangeAddr = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr); ERC20(_srcAddr).safeApprove(uniswapExchangeAddr, _srcAmount); destAmount = UniswapExchangeInterface(uniswapExchangeAddr). tokenToTokenTransferInput(_srcAmount, 1, 1, block.timestamp + 1, msg.sender, _destAddr); } return destAmount; } /// @notice Buys a _destAmount of tokens at Uniswap /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint srcAmount function buy(address _srcAddr, address _destAddr, uint _destAmount) external override payable returns(uint) { address uniswapExchangeAddr; uint srcAmount; _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); // if we are buying ether if (_destAddr == WETH_ADDRESS) { uniswapExchangeAddr = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr); ERC20(_srcAddr).safeApprove(uniswapExchangeAddr, uint(-1)); srcAmount = UniswapExchangeInterface(uniswapExchangeAddr). tokenToEthTransferOutput(_destAmount, uint(-1), block.timestamp + 1, msg.sender); } // if we are buying token to token else { uniswapExchangeAddr = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr); ERC20(_srcAddr).safeApprove(uniswapExchangeAddr, uint(-1)); srcAmount = UniswapExchangeInterface(uniswapExchangeAddr). tokenToTokenTransferOutput(_destAmount, uint(-1), uint(-1), block.timestamp + 1, msg.sender, _destAddr); } // Send the leftover from the source token back sendLeftOver(_srcAddr); return srcAmount; } /// @notice Return a rate for which we can sell an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Rate function getSellRate(address _srcAddr, address _destAddr, uint _srcAmount) public override view returns (uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); if(_srcAddr == WETH_ADDRESS) { address uniswapTokenAddress = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_destAddr); return wdiv(UniswapExchangeInterface(uniswapTokenAddress).getEthToTokenInputPrice(_srcAmount), _srcAmount); } else if (_destAddr == WETH_ADDRESS) { address uniswapTokenAddress = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr); return wdiv(UniswapExchangeInterface(uniswapTokenAddress).getTokenToEthInputPrice(_srcAmount), _srcAmount); } else { uint ethBought = UniswapExchangeInterface(UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr)).getTokenToEthInputPrice(_srcAmount); return wdiv(UniswapExchangeInterface(UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_destAddr)).getEthToTokenInputPrice(ethBought), _srcAmount); } } /// @notice Return a rate for which we can buy an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint Rate function getBuyRate(address _srcAddr, address _destAddr, uint _destAmount) public override view returns (uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); if(_srcAddr == WETH_ADDRESS) { address uniswapTokenAddress = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_destAddr); return wdiv(1 ether, wdiv(UniswapExchangeInterface(uniswapTokenAddress).getEthToTokenOutputPrice(_destAmount), _destAmount)); } else if (_destAddr == WETH_ADDRESS) { address uniswapTokenAddress = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr); return wdiv(1 ether, wdiv(UniswapExchangeInterface(uniswapTokenAddress).getTokenToEthOutputPrice(_destAmount), _destAmount)); } else { uint ethNeeded = UniswapExchangeInterface(UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_destAddr)).getTokenToEthOutputPrice(_destAmount); return wdiv(1 ether, wdiv(UniswapExchangeInterface(UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr)).getEthToTokenOutputPrice(ethNeeded), _destAmount)); } } /// @notice Send any leftover tokens, we use to clear out srcTokens after buy /// @param _srcAddr Source token address function sendLeftOver(address _srcAddr) internal { msg.sender.transfer(address(this).balance); if (_srcAddr != KYBER_ETH_ADDRESS) { ERC20(_srcAddr).safeTransfer(msg.sender, ERC20(_srcAddr).balanceOf(address(this))); } } /// @notice Converts Kybers Eth address -> Weth /// @param _src Input address function ethToWethAddr(address _src) internal pure returns (address) { return _src == KYBER_ETH_ADDRESS ? WETH_ADDRESS : _src; } receive() payable external {} } contract DyDxFlashLoanTaker is DydxFlashLoanBase, ProxyPermission { address public constant WETH_ADDR = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; /// @notice Takes flash loan for _receiver /// @dev Receiver must send back WETH + 2 wei after executing transaction /// @dev Method is meant to be called from proxy and proxy will give authorization to _receiver /// @param _receiver Address of funds receiver /// @param _ethAmount ETH amount that needs to be pulled from dydx /// @param _encodedData Bytes with packed data function takeLoan(address _receiver, uint256 _ethAmount, bytes memory _encodedData) public { ISoloMargin solo = ISoloMargin(SOLO_MARGIN_ADDRESS); // Get marketId from token address uint256 marketId = _getMarketIdFromTokenAddress(WETH_ADDR); // Calculate repay amount (_amount + (2 wei)) // Approve transfer from uint256 repayAmount = _getRepaymentAmountInternal(_ethAmount); ERC20(WETH_ADDR).approve(SOLO_MARGIN_ADDRESS, repayAmount); Actions.ActionArgs[] memory operations = new Actions.ActionArgs[](3); operations[0] = _getWithdrawAction(marketId, _ethAmount, _receiver); operations[1] = _getCallAction( _encodedData, _receiver ); operations[2] = _getDepositAction(marketId, repayAmount, address(this)); Account.Info[] memory accountInfos = new Account.Info[](1); accountInfos[0] = _getAccountInfo(); givePermission(_receiver); solo.operate(accountInfos, operations); removePermission(_receiver); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "DyDxFlashLoanTaken", abi.encode(_receiver, _ethAmount, _encodedData)); } } abstract contract CTokenInterface is ERC20 { function mint(uint256 mintAmount) external virtual returns (uint256); // function mint() external virtual payable; function accrueInterest() public virtual returns (uint); function redeem(uint256 redeemTokens) external virtual returns (uint256); function redeemUnderlying(uint256 redeemAmount) external virtual returns (uint256); function borrow(uint256 borrowAmount) external virtual returns (uint256); function repayBorrow(uint256 repayAmount) external virtual returns (uint256); function repayBorrow() external virtual payable; function repayBorrowBehalf(address borrower, uint256 repayAmount) external virtual returns (uint256); function repayBorrowBehalf(address borrower) external virtual payable; function liquidateBorrow(address borrower, uint256 repayAmount, address cTokenCollateral) external virtual returns (uint256); function liquidateBorrow(address borrower, address cTokenCollateral) external virtual payable; function exchangeRateCurrent() external virtual returns (uint256); function supplyRatePerBlock() external virtual returns (uint256); function borrowRatePerBlock() external virtual returns (uint256); function totalReserves() external virtual returns (uint256); function reserveFactorMantissa() external virtual returns (uint256); function borrowBalanceCurrent(address account) external virtual returns (uint256); function totalBorrowsCurrent() external virtual returns (uint256); function getCash() external virtual returns (uint256); function balanceOfUnderlying(address owner) external virtual returns (uint256); function underlying() external virtual returns (address); function getAccountSnapshot(address account) external virtual view returns (uint, uint, uint, uint); } abstract contract ISubscriptionsV2 is StaticV2 { function getOwner(uint _cdpId) external view virtual returns(address); function getSubscribedInfo(uint _cdpId) public view virtual returns(bool, uint128, uint128, uint128, uint128, address, uint coll, uint debt); function getCdpHolder(uint _cdpId) public view virtual returns (bool subscribed, CdpHolder memory); } contract MCDMonitorV2 is DSMath, AdminAuth, GasBurner, StaticV2 { uint public REPAY_GAS_TOKEN = 25; uint public BOOST_GAS_TOKEN = 25; uint public MAX_GAS_PRICE = 200000000000; // 200 gwei uint public REPAY_GAS_COST = 2500000; uint public BOOST_GAS_COST = 2500000; MCDMonitorProxyV2 public monitorProxyContract; ISubscriptionsV2 public subscriptionsContract; address public mcdSaverTakerAddress; address public constant BOT_REGISTRY_ADDRESS = 0x637726f8b08a7ABE3aE3aCaB01A80E2d8ddeF77B; Manager public manager = Manager(0x5ef30b9986345249bc32d8928B7ee64DE9435E39); Vat public vat = Vat(0x35D1b3F3D7966A1DFe207aa4514C12a259A0492B); Spotter public spotter = Spotter(0x65C79fcB50Ca1594B025960e539eD7A9a6D434A3); DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); modifier onlyApproved() { require(BotRegistry(BOT_REGISTRY_ADDRESS).botList(msg.sender), "Not auth bot"); _; } constructor(address _monitorProxy, address _subscriptions, address _mcdSaverTakerAddress) public { monitorProxyContract = MCDMonitorProxyV2(_monitorProxy); subscriptionsContract = ISubscriptionsV2(_subscriptions); mcdSaverTakerAddress = _mcdSaverTakerAddress; } /// @notice Bots call this method to repay for user when conditions are met /// @dev If the contract ownes gas token it will try and use it for gas price reduction function repayFor( SaverExchangeCore.ExchangeData memory _exchangeData, uint _cdpId, uint _nextPrice, address _joinAddr ) public payable onlyApproved burnGas(REPAY_GAS_TOKEN) { (bool isAllowed, uint ratioBefore) = canCall(Method.Repay, _cdpId, _nextPrice); require(isAllowed); uint gasCost = calcGasCost(REPAY_GAS_COST); address owner = subscriptionsContract.getOwner(_cdpId); monitorProxyContract.callExecute{value: msg.value}( owner, mcdSaverTakerAddress, abi.encodeWithSignature( "repayWithLoan((address,address,uint256,uint256,uint256,address,address,bytes,uint256),uint256,uint256,address)", _exchangeData, _cdpId, gasCost, _joinAddr)); (bool isGoodRatio, uint ratioAfter) = ratioGoodAfter(Method.Repay, _cdpId, _nextPrice); require(isGoodRatio); returnEth(); logger.Log(address(this), owner, "AutomaticMCDRepay", abi.encode(ratioBefore, ratioAfter)); } /// @notice Bots call this method to boost for user when conditions are met /// @dev If the contract ownes gas token it will try and use it for gas price reduction function boostFor( SaverExchangeCore.ExchangeData memory _exchangeData, uint _cdpId, uint _nextPrice, address _joinAddr ) public payable onlyApproved burnGas(BOOST_GAS_TOKEN) { (bool isAllowed, uint ratioBefore) = canCall(Method.Boost, _cdpId, _nextPrice); require(isAllowed); uint gasCost = calcGasCost(BOOST_GAS_COST); address owner = subscriptionsContract.getOwner(_cdpId); monitorProxyContract.callExecute{value: msg.value}( owner, mcdSaverTakerAddress, abi.encodeWithSignature( "boostWithLoan((address,address,uint256,uint256,uint256,address,address,bytes,uint256),uint256,uint256,address)", _exchangeData, _cdpId, gasCost, _joinAddr)); (bool isGoodRatio, uint ratioAfter) = ratioGoodAfter(Method.Boost, _cdpId, _nextPrice); require(isGoodRatio); returnEth(); logger.Log(address(this), owner, "AutomaticMCDBoost", abi.encode(ratioBefore, ratioAfter)); } /******************* INTERNAL METHODS ********************************/ function returnEth() internal { // return if some eth left if (address(this).balance > 0) { msg.sender.transfer(address(this).balance); } } /******************* STATIC METHODS ********************************/ /// @notice Returns an address that owns the CDP /// @param _cdpId Id of the CDP function getOwner(uint _cdpId) public view returns(address) { return manager.owns(_cdpId); } /// @notice Gets CDP info (collateral, debt) /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP function getCdpInfo(uint _cdpId, bytes32 _ilk) public view returns (uint, uint) { address urn = manager.urns(_cdpId); (uint collateral, uint debt) = vat.urns(_ilk, urn); (,uint rate,,,) = vat.ilks(_ilk); return (collateral, rmul(debt, rate)); } /// @notice Gets a price of the asset /// @param _ilk Ilk of the CDP function getPrice(bytes32 _ilk) public view returns (uint) { (, uint mat) = spotter.ilks(_ilk); (,,uint spot,,) = vat.ilks(_ilk); return rmul(rmul(spot, spotter.par()), mat); } /// @notice Gets CDP ratio /// @param _cdpId Id of the CDP /// @param _nextPrice Next price for user function getRatio(uint _cdpId, uint _nextPrice) public view returns (uint) { bytes32 ilk = manager.ilks(_cdpId); uint price = (_nextPrice == 0) ? getPrice(ilk) : _nextPrice; (uint collateral, uint debt) = getCdpInfo(_cdpId, ilk); if (debt == 0) return 0; return rdiv(wmul(collateral, price), debt) / (10 ** 18); } /// @notice Checks if Boost/Repay could be triggered for the CDP /// @dev Called by MCDMonitor to enforce the min/max check function canCall(Method _method, uint _cdpId, uint _nextPrice) public view returns(bool, uint) { bool subscribed; CdpHolder memory holder; (subscribed, holder) = subscriptionsContract.getCdpHolder(_cdpId); // check if cdp is subscribed if (!subscribed) return (false, 0); // check if using next price is allowed if (_nextPrice > 0 && !holder.nextPriceEnabled) return (false, 0); // check if boost and boost allowed if (_method == Method.Boost && !holder.boostEnabled) return (false, 0); // check if owner is still owner if (getOwner(_cdpId) != holder.owner) return (false, 0); uint currRatio = getRatio(_cdpId, _nextPrice); if (_method == Method.Repay) { return (currRatio < holder.minRatio, currRatio); } else if (_method == Method.Boost) { return (currRatio > holder.maxRatio, currRatio); } } /// @dev After the Boost/Repay check if the ratio doesn't trigger another call function ratioGoodAfter(Method _method, uint _cdpId, uint _nextPrice) public view returns(bool, uint) { CdpHolder memory holder; (, holder) = subscriptionsContract.getCdpHolder(_cdpId); uint currRatio = getRatio(_cdpId, _nextPrice); if (_method == Method.Repay) { return (currRatio < holder.maxRatio, currRatio); } else if (_method == Method.Boost) { return (currRatio > holder.minRatio, currRatio); } } /// @notice Calculates gas cost (in Eth) of tx /// @dev Gas price is limited to MAX_GAS_PRICE to prevent attack of draining user CDP /// @param _gasAmount Amount of gas used for the tx function calcGasCost(uint _gasAmount) public view returns (uint) { uint gasPrice = tx.gasprice <= MAX_GAS_PRICE ? tx.gasprice : MAX_GAS_PRICE; return mul(gasPrice, _gasAmount); } /******************* OWNER ONLY OPERATIONS ********************************/ /// @notice Allows owner to change gas cost for boost operation, but only up to 3 millions /// @param _gasCost New gas cost for boost method function changeBoostGasCost(uint _gasCost) public onlyOwner { require(_gasCost < 3000000); BOOST_GAS_COST = _gasCost; } /// @notice Allows owner to change gas cost for repay operation, but only up to 3 millions /// @param _gasCost New gas cost for repay method function changeRepayGasCost(uint _gasCost) public onlyOwner { require(_gasCost < 3000000); REPAY_GAS_COST = _gasCost; } /// @notice Allows owner to change max gas price /// @param _maxGasPrice New max gas price function changeMaxGasPrice(uint _maxGasPrice) public onlyOwner { require(_maxGasPrice < 500000000000); MAX_GAS_PRICE = _maxGasPrice; } /// @notice Allows owner to change the amount of gas token burned per function call /// @param _gasAmount Amount of gas token /// @param _isRepay Flag to know for which function we are setting the gas token amount function changeGasTokenAmount(uint _gasAmount, bool _isRepay) public onlyOwner { if (_isRepay) { REPAY_GAS_TOKEN = _gasAmount; } else { BOOST_GAS_TOKEN = _gasAmount; } } } contract MCDCloseFlashLoan is SaverExchangeCore, MCDSaverProxyHelper, FlashLoanReceiverBase, AdminAuth { ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); uint public constant SERVICE_FEE = 400; // 0.25% Fee bytes32 internal constant ETH_ILK = 0x4554482d41000000000000000000000000000000000000000000000000000000; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; address public constant DAI_JOIN_ADDRESS = 0x9759A6Ac90977b93B58547b4A71c78317f391A28; address public constant ETH_JOIN_ADDRESS = 0x2F0b23f53734252Bda2277357e97e1517d6B042A; address public constant SPOTTER_ADDRESS = 0x65C79fcB50Ca1594B025960e539eD7A9a6D434A3; address public constant VAT_ADDRESS = 0x35D1b3F3D7966A1DFe207aa4514C12a259A0492B; Manager public constant manager = Manager(0x5ef30b9986345249bc32d8928B7ee64DE9435E39); DaiJoin public constant daiJoin = DaiJoin(DAI_JOIN_ADDRESS); Spotter public constant spotter = Spotter(SPOTTER_ADDRESS); Vat public constant vat = Vat(VAT_ADDRESS); struct CloseData { uint cdpId; uint collAmount; uint daiAmount; uint minAccepted; address joinAddr; address proxy; uint flFee; bool toDai; address reserve; uint amount; } constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public {} function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { ( uint[8] memory numData, address[5] memory addrData, bytes memory callData, address proxy, bool toDai ) = abi.decode(_params, (uint256[8],address[5],bytes,address,bool)); ExchangeData memory exchangeData = ExchangeData({ srcAddr: addrData[0], destAddr: addrData[1], srcAmount: numData[4], destAmount: numData[5], minPrice: numData[6], wrapper: addrData[3], exchangeAddr: addrData[2], callData: callData, price0x: numData[7] }); CloseData memory closeData = CloseData({ cdpId: numData[0], collAmount: numData[1], daiAmount: numData[2], minAccepted: numData[3], joinAddr: addrData[4], proxy: proxy, flFee: _fee, toDai: toDai, reserve: _reserve, amount: _amount }); address user = DSProxy(payable(closeData.proxy)).owner(); closeCDP(closeData, exchangeData, user); } function closeCDP( CloseData memory _closeData, ExchangeData memory _exchangeData, address _user ) internal { paybackDebt(_closeData.cdpId, manager.ilks(_closeData.cdpId), _closeData.daiAmount); // payback whole debt drawMaxCollateral(_closeData.cdpId, _closeData.joinAddr, _closeData.collAmount); // draw whole collateral uint daiSwaped = 0; uint dfsFee = 0; if (_closeData.toDai) { _exchangeData.srcAmount = _closeData.collAmount; (, daiSwaped) = _sell(_exchangeData); dfsFee = getFee(daiSwaped, _user); } else { dfsFee = getFee(_closeData.daiAmount, _user); _exchangeData.destAmount = (_closeData.daiAmount + _closeData.flFee + dfsFee); (, daiSwaped) = _buy(_exchangeData); } takeFee(dfsFee); address tokenAddr = getVaultCollAddr(_closeData.joinAddr); if (_closeData.toDai) { tokenAddr = DAI_ADDRESS; } require(getBalance(tokenAddr) >= _closeData.minAccepted, "Below min. number of eth specified"); transferFundsBackToPoolInternal(_closeData.reserve, _closeData.amount.add(_closeData.flFee)); sendLeftover(tokenAddr, DAI_ADDRESS, payable(_user)); } function drawMaxCollateral(uint _cdpId, address _joinAddr, uint _amount) internal returns (uint) { manager.frob(_cdpId, -toPositiveInt(_amount), 0); manager.flux(_cdpId, address(this), _amount); uint joinAmount = _amount; if (Join(_joinAddr).dec() != 18) { joinAmount = _amount / (10 ** (18 - Join(_joinAddr).dec())); } Join(_joinAddr).exit(address(this), joinAmount); if (_joinAddr == ETH_JOIN_ADDRESS) { Join(_joinAddr).gem().withdraw(joinAmount); // Weth -> Eth } return joinAmount; } function paybackDebt(uint _cdpId, bytes32 _ilk, uint _daiAmount) internal { address urn = manager.urns(_cdpId); daiJoin.dai().approve(DAI_JOIN_ADDRESS, _daiAmount); daiJoin.join(urn, _daiAmount); manager.frob(_cdpId, 0, normalizePaybackAmount(VAT_ADDRESS, urn, _ilk)); } function takeFee(uint _feeAmount) internal returns (uint) { ERC20(DAI_ADDRESS).transfer(WALLET_ID, _feeAmount); } function getFee(uint _amount, address _owner) internal view returns (uint feeAmount) { uint fee = SERVICE_FEE; if (Discount(DISCOUNT_ADDRESS).isCustomFeeSet(_owner)) { fee = Discount(DISCOUNT_ADDRESS).getCustomServiceFee(_owner); } feeAmount = (fee == 0) ? 0 : (_amount / fee); // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } } function getVaultCollAddr(address _joinAddr) internal view returns (address) { address tokenAddr = address(Join(_joinAddr).gem()); if (tokenAddr == WETH_ADDRESS) { return KYBER_ETH_ADDRESS; } return tokenAddr; } function getPrice(bytes32 _ilk) public view returns (uint256) { (, uint256 mat) = spotter.ilks(_ilk); (, , uint256 spot, , ) = vat.ilks(_ilk); return rmul(rmul(spot, spotter.par()), mat); } receive() external override(FlashLoanReceiverBase, SaverExchangeCore) payable {} } contract MCDCloseTaker is MCDSaverProxyHelper { address public constant SUBSCRIPTION_ADDRESS_NEW = 0xC45d4f6B6bf41b6EdAA58B01c4298B8d9078269a; address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); // solhint-disable-next-line const-name-snakecase Manager public constant manager = Manager(0x5ef30b9986345249bc32d8928B7ee64DE9435E39); address public constant SPOTTER_ADDRESS = 0x65C79fcB50Ca1594B025960e539eD7A9a6D434A3; address public constant VAT_ADDRESS = 0x35D1b3F3D7966A1DFe207aa4514C12a259A0492B; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; // solhint-disable-next-line const-name-snakecase DefisaverLogger public constant logger = DefisaverLogger(DEFISAVER_LOGGER); struct CloseData { uint cdpId; address joinAddr; uint collAmount; uint daiAmount; uint minAccepted; bool wholeDebt; bool toDai; } Vat public constant vat = Vat(VAT_ADDRESS); Spotter public constant spotter = Spotter(SPOTTER_ADDRESS); function closeWithLoan( SaverExchangeCore.ExchangeData memory _exchangeData, CloseData memory _closeData, address payable mcdCloseFlashLoan ) public payable { mcdCloseFlashLoan.transfer(msg.value); // 0x fee if (_closeData.wholeDebt) { _closeData.daiAmount = getAllDebt( VAT_ADDRESS, manager.urns(_closeData.cdpId), manager.urns(_closeData.cdpId), manager.ilks(_closeData.cdpId) ); (_closeData.collAmount, ) = getCdpInfo(manager, _closeData.cdpId, manager.ilks(_closeData.cdpId)); } manager.cdpAllow(_closeData.cdpId, mcdCloseFlashLoan, 1); (uint[8] memory numData, address[5] memory addrData, bytes memory callData) = _packData(_closeData, _exchangeData); bytes memory paramsData = abi.encode(numData, addrData, callData, address(this), _closeData.toDai); lendingPool.flashLoan(mcdCloseFlashLoan, DAI_ADDRESS, _closeData.daiAmount, paramsData); manager.cdpAllow(_closeData.cdpId, mcdCloseFlashLoan, 0); // If sub. to automatic protection unsubscribe unsubscribe(SUBSCRIPTION_ADDRESS_NEW, _closeData.cdpId); logger.Log(address(this), msg.sender, "MCDClose", abi.encode(_closeData.cdpId, _closeData.collAmount, _closeData.daiAmount, _closeData.toDai)); } /// @notice Gets the maximum amount of debt available to generate /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP function getMaxDebt(uint256 _cdpId, bytes32 _ilk) public view returns (uint256) { uint256 price = getPrice(_ilk); (, uint256 mat) = spotter.ilks(_ilk); (uint256 collateral, uint256 debt) = getCdpInfo(manager, _cdpId, _ilk); return sub(wdiv(wmul(collateral, price), mat), debt); } /// @notice Gets a price of the asset /// @param _ilk Ilk of the CDP function getPrice(bytes32 _ilk) public view returns (uint256) { (, uint256 mat) = spotter.ilks(_ilk); (, , uint256 spot, , ) = vat.ilks(_ilk); return rmul(rmul(spot, spotter.par()), mat); } function unsubscribe(address _subContract, uint _cdpId) internal { (, bool isSubscribed) = IMCDSubscriptions(_subContract).subscribersPos(_cdpId); if (isSubscribed) { IMCDSubscriptions(_subContract).unsubscribe(_cdpId); } } function _packData( CloseData memory _closeData, SaverExchangeCore.ExchangeData memory exchangeData ) internal pure returns (uint[8] memory numData, address[5] memory addrData, bytes memory callData) { numData = [ _closeData.cdpId, _closeData.collAmount, _closeData.daiAmount, _closeData.minAccepted, exchangeData.srcAmount, exchangeData.destAmount, exchangeData.minPrice, exchangeData.price0x ]; addrData = [ exchangeData.srcAddr, exchangeData.destAddr, exchangeData.exchangeAddr, exchangeData.wrapper, _closeData.joinAddr ]; callData = exchangeData.callData; } } contract MCDCreateFlashLoan is SaverExchangeCore, AdminAuth, FlashLoanReceiverBase { address public constant CREATE_PROXY_ACTIONS = 0x6d0984E80a86f26c0dd564ca0CF74a8E9Da03305; uint public constant SERVICE_FEE = 400; // 0.25% Fee address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); address public constant ETH_JOIN_ADDRESS = 0x2F0b23f53734252Bda2277357e97e1517d6B042A; address public constant DAI_JOIN_ADDRESS = 0x9759A6Ac90977b93B58547b4A71c78317f391A28; address public constant JUG_ADDRESS = 0x19c0976f590D67707E62397C87829d896Dc0f1F1; address public constant MANAGER_ADDRESS = 0x5ef30b9986345249bc32d8928B7ee64DE9435E39; constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public {} function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { //check the contract has the specified balance require(_amount <= getBalanceInternal(address(this), _reserve), "Invalid balance for the contract"); ( uint[6] memory numData, address[5] memory addrData, bytes memory callData, address proxy ) = abi.decode(_params, (uint256[6],address[5],bytes,address)); ExchangeData memory exchangeData = ExchangeData({ srcAddr: addrData[0], destAddr: addrData[1], srcAmount: numData[2], destAmount: numData[3], minPrice: numData[4], wrapper: addrData[3], exchangeAddr: addrData[2], callData: callData, price0x: numData[5] }); openAndLeverage(numData[0], numData[1] + _fee, addrData[4], proxy, exchangeData); transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } } function openAndLeverage( uint _collAmount, uint _daiAmountAndFee, address _joinAddr, address _proxy, ExchangeData memory _exchangeData ) public { uint dfsFee = getFee(_exchangeData.srcAmount, DSProxy(payable(_proxy)).owner()); _exchangeData.srcAmount = (_exchangeData.srcAmount - dfsFee); (, uint256 collSwaped) = _sell(_exchangeData); bytes32 ilk = Join(_joinAddr).ilk(); if (_joinAddr == ETH_JOIN_ADDRESS) { MCDCreateProxyActions(CREATE_PROXY_ACTIONS).openLockETHAndDraw{value: address(this).balance}( MANAGER_ADDRESS, JUG_ADDRESS, ETH_JOIN_ADDRESS, DAI_JOIN_ADDRESS, ilk, _daiAmountAndFee, _proxy ); } else { ERC20(address(Join(_joinAddr).gem())).safeApprove(CREATE_PROXY_ACTIONS, 0); ERC20(address(Join(_joinAddr).gem())).safeApprove(CREATE_PROXY_ACTIONS, uint256(-1)); MCDCreateProxyActions(CREATE_PROXY_ACTIONS).openLockGemAndDraw( MANAGER_ADDRESS, JUG_ADDRESS, _joinAddr, DAI_JOIN_ADDRESS, ilk, (_collAmount + collSwaped), _daiAmountAndFee, true, _proxy ); } } function getFee(uint _amount, address _owner) internal returns (uint feeAmount) { uint fee = SERVICE_FEE; if (Discount(DISCOUNT_ADDRESS).isCustomFeeSet(_owner)) { fee = Discount(DISCOUNT_ADDRESS).getCustomServiceFee(_owner); } feeAmount = (fee == 0) ? 0 : (_amount / fee); // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } ERC20(DAI_ADDRESS).transfer(WALLET_ID, feeAmount); } receive() external override(FlashLoanReceiverBase, SaverExchangeCore) payable {} } contract MCDSaverProxy is SaverExchangeCore, MCDSaverProxyHelper { uint public constant MANUAL_SERVICE_FEE = 400; // 0.25% Fee uint public constant AUTOMATIC_SERVICE_FEE = 333; // 0.3% Fee bytes32 public constant ETH_ILK = 0x4554482d41000000000000000000000000000000000000000000000000000000; address public constant MANAGER_ADDRESS = 0x5ef30b9986345249bc32d8928B7ee64DE9435E39; address public constant VAT_ADDRESS = 0x35D1b3F3D7966A1DFe207aa4514C12a259A0492B; address public constant SPOTTER_ADDRESS = 0x65C79fcB50Ca1594B025960e539eD7A9a6D434A3; address public constant DAI_JOIN_ADDRESS = 0x9759A6Ac90977b93B58547b4A71c78317f391A28; address public constant JUG_ADDRESS = 0x19c0976f590D67707E62397C87829d896Dc0f1F1; address public constant ETH_JOIN_ADDRESS = 0x2F0b23f53734252Bda2277357e97e1517d6B042A; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; address public constant BOT_REGISTRY_ADDRESS = 0x637726f8b08a7ABE3aE3aCaB01A80E2d8ddeF77B; Manager public constant manager = Manager(MANAGER_ADDRESS); Vat public constant vat = Vat(VAT_ADDRESS); DaiJoin public constant daiJoin = DaiJoin(DAI_JOIN_ADDRESS); Spotter public constant spotter = Spotter(SPOTTER_ADDRESS); DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); /// @notice Repay - draws collateral, converts to Dai and repays the debt /// @dev Must be called by the DSProxy contract that owns the CDP function repay( SaverExchangeCore.ExchangeData memory _exchangeData, uint _cdpId, uint _gasCost, address _joinAddr ) public payable { address owner = getOwner(manager, _cdpId); bytes32 ilk = manager.ilks(_cdpId); drawCollateral(_cdpId, _joinAddr, _exchangeData.srcAmount); (, uint daiAmount) = _sell(_exchangeData); uint daiAfterFee = sub(daiAmount, getFee(daiAmount, _gasCost, owner)); paybackDebt(_cdpId, ilk, daiAfterFee, owner); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } logger.Log(address(this), msg.sender, "MCDRepay", abi.encode(_cdpId, owner, _exchangeData.srcAmount, daiAmount)); } /// @notice Boost - draws Dai, converts to collateral and adds to CDP /// @dev Must be called by the DSProxy contract that owns the CDP function boost( SaverExchangeCore.ExchangeData memory _exchangeData, uint _cdpId, uint _gasCost, address _joinAddr ) public payable { address owner = getOwner(manager, _cdpId); bytes32 ilk = manager.ilks(_cdpId); uint daiDrawn = drawDai(_cdpId, ilk, _exchangeData.srcAmount); uint daiAfterFee = sub(daiDrawn, getFee(daiDrawn, _gasCost, owner)); _exchangeData.srcAmount = daiAfterFee; (, uint swapedColl) = _sell(_exchangeData); addCollateral(_cdpId, _joinAddr, swapedColl); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } logger.Log(address(this), msg.sender, "MCDBoost", abi.encode(_cdpId, owner, _exchangeData.srcAmount, swapedColl)); } /// @notice Draws Dai from the CDP /// @dev If _daiAmount is bigger than max available we'll draw max /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP /// @param _daiAmount Amount of Dai to draw function drawDai(uint _cdpId, bytes32 _ilk, uint _daiAmount) internal returns (uint) { uint rate = Jug(JUG_ADDRESS).drip(_ilk); uint daiVatBalance = vat.dai(manager.urns(_cdpId)); uint maxAmount = getMaxDebt(_cdpId, _ilk); if (_daiAmount >= maxAmount) { _daiAmount = sub(maxAmount, 1); } manager.frob(_cdpId, int(0), normalizeDrawAmount(_daiAmount, rate, daiVatBalance)); manager.move(_cdpId, address(this), toRad(_daiAmount)); if (vat.can(address(this), address(DAI_JOIN_ADDRESS)) == 0) { vat.hope(DAI_JOIN_ADDRESS); } DaiJoin(DAI_JOIN_ADDRESS).exit(address(this), _daiAmount); return _daiAmount; } /// @notice Adds collateral to the CDP /// @param _cdpId Id of the CDP /// @param _joinAddr Address of the join contract for the CDP collateral /// @param _amount Amount of collateral to add function addCollateral(uint _cdpId, address _joinAddr, uint _amount) internal { int convertAmount = 0; if (_joinAddr == ETH_JOIN_ADDRESS) { Join(_joinAddr).gem().deposit{value: _amount}(); convertAmount = toPositiveInt(_amount); } else { convertAmount = toPositiveInt(convertTo18(_joinAddr, _amount)); } ERC20(address(Join(_joinAddr).gem())).safeApprove(_joinAddr, 0); ERC20(address(Join(_joinAddr).gem())).safeApprove(_joinAddr, _amount); Join(_joinAddr).join(address(this), _amount); vat.frob( manager.ilks(_cdpId), manager.urns(_cdpId), address(this), address(this), convertAmount, 0 ); } /// @notice Draws collateral and returns it to DSProxy /// @dev If _amount is bigger than max available we'll draw max /// @param _cdpId Id of the CDP /// @param _joinAddr Address of the join contract for the CDP collateral /// @param _amount Amount of collateral to draw function drawCollateral(uint _cdpId, address _joinAddr, uint _amount) internal returns (uint) { uint frobAmount = _amount; if (Join(_joinAddr).dec() != 18) { frobAmount = _amount * (10 ** (18 - Join(_joinAddr).dec())); } manager.frob(_cdpId, -toPositiveInt(frobAmount), 0); manager.flux(_cdpId, address(this), frobAmount); Join(_joinAddr).exit(address(this), _amount); if (_joinAddr == ETH_JOIN_ADDRESS) { Join(_joinAddr).gem().withdraw(_amount); // Weth -> Eth } return _amount; } /// @notice Paybacks Dai debt /// @dev If the _daiAmount is bigger than the whole debt, returns extra Dai /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP /// @param _daiAmount Amount of Dai to payback /// @param _owner Address that owns the DSProxy that owns the CDP function paybackDebt(uint _cdpId, bytes32 _ilk, uint _daiAmount, address _owner) internal { address urn = manager.urns(_cdpId); uint wholeDebt = getAllDebt(VAT_ADDRESS, urn, urn, _ilk); if (_daiAmount > wholeDebt) { ERC20(DAI_ADDRESS).transfer(_owner, sub(_daiAmount, wholeDebt)); _daiAmount = wholeDebt; } if (ERC20(DAI_ADDRESS).allowance(address(this), DAI_JOIN_ADDRESS) == 0) { ERC20(DAI_ADDRESS).approve(DAI_JOIN_ADDRESS, uint(-1)); } daiJoin.join(urn, _daiAmount); manager.frob(_cdpId, 0, normalizePaybackAmount(VAT_ADDRESS, urn, _ilk)); } /// @notice Calculates the fee amount /// @param _amount Dai amount that is converted /// @param _gasCost Used for Monitor, estimated gas cost of tx /// @param _owner The address that controlls the DSProxy that owns the CDP function getFee(uint _amount, uint _gasCost, address _owner) internal returns (uint feeAmount) { uint fee = MANUAL_SERVICE_FEE; if (BotRegistry(BOT_REGISTRY_ADDRESS).botList(tx.origin)) { fee = AUTOMATIC_SERVICE_FEE; } if (Discount(DISCOUNT_ADDRESS).isCustomFeeSet(_owner)) { fee = Discount(DISCOUNT_ADDRESS).getCustomServiceFee(_owner); } feeAmount = (fee == 0) ? 0 : (_amount / fee); if (_gasCost != 0) { uint ethDaiPrice = getPrice(ETH_ILK); _gasCost = rmul(_gasCost, ethDaiPrice); feeAmount = add(feeAmount, _gasCost); } // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } ERC20(DAI_ADDRESS).transfer(WALLET_ID, feeAmount); } /// @notice Gets the maximum amount of collateral available to draw /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP /// @param _joinAddr Joind address of collateral /// @dev Substracts 10 wei to aviod rounding error later on function getMaxCollateral(uint _cdpId, bytes32 _ilk, address _joinAddr) public view returns (uint) { uint price = getPrice(_ilk); (uint collateral, uint debt) = getCdpInfo(manager, _cdpId, _ilk); (, uint mat) = Spotter(SPOTTER_ADDRESS).ilks(_ilk); uint maxCollateral = sub(sub(collateral, (div(mul(mat, debt), price))), 10); uint normalizeMaxCollateral = maxCollateral; if (Join(_joinAddr).dec() != 18) { normalizeMaxCollateral = maxCollateral / (10 ** (18 - Join(_joinAddr).dec())); } return normalizeMaxCollateral; } /// @notice Gets the maximum amount of debt available to generate /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP /// @dev Substracts 10 wei to aviod rounding error later on function getMaxDebt(uint _cdpId, bytes32 _ilk) public virtual view returns (uint) { uint price = getPrice(_ilk); (, uint mat) = spotter.ilks(_ilk); (uint collateral, uint debt) = getCdpInfo(manager, _cdpId, _ilk); return sub(sub(div(mul(collateral, price), mat), debt), 10); } /// @notice Gets a price of the asset /// @param _ilk Ilk of the CDP function getPrice(bytes32 _ilk) public view returns (uint) { (, uint mat) = spotter.ilks(_ilk); (,,uint spot,,) = vat.ilks(_ilk); return rmul(rmul(spot, spotter.par()), mat); } /// @notice Gets CDP ratio /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP function getRatio(uint _cdpId, bytes32 _ilk) public view returns (uint) { uint price = getPrice( _ilk); (uint collateral, uint debt) = getCdpInfo(manager, _cdpId, _ilk); if (debt == 0) return 0; return rdiv(wmul(collateral, price), debt); } /// @notice Gets CDP info (collateral, debt, price, ilk) /// @param _cdpId Id of the CDP function getCdpDetailedInfo(uint _cdpId) public view returns (uint collateral, uint debt, uint price, bytes32 ilk) { address urn = manager.urns(_cdpId); ilk = manager.ilks(_cdpId); (collateral, debt) = vat.urns(ilk, urn); (,uint rate,,,) = vat.ilks(ilk); debt = rmul(debt, rate); price = getPrice(ilk); } } contract MCDSaverTaker is MCDSaverProxy, GasBurner { address payable public constant MCD_SAVER_FLASH_LOAN = 0x28e444b53a9e7E3F6fFe50E93b18dCce7838551F; address public constant AAVE_POOL_CORE = 0x3dfd23A6c5E8BbcFc9581d2E864a68feb6a076d3; ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); function boostWithLoan( SaverExchangeCore.ExchangeData memory _exchangeData, uint _cdpId, uint _gasCost, address _joinAddr ) public payable burnGas(25) { uint256 maxDebt = getMaxDebt(_cdpId, manager.ilks(_cdpId)); if (maxDebt >= _exchangeData.srcAmount) { boost(_exchangeData, _cdpId, _gasCost, _joinAddr); return; } MCD_SAVER_FLASH_LOAN.transfer(msg.value); // 0x fee uint256 loanAmount = sub(_exchangeData.srcAmount, maxDebt); uint maxLiq = getAvailableLiquidity(DAI_JOIN_ADDRESS); loanAmount = loanAmount > maxLiq ? maxLiq : loanAmount; manager.cdpAllow(_cdpId, MCD_SAVER_FLASH_LOAN, 1); bytes memory paramsData = abi.encode(packExchangeData(_exchangeData), _cdpId, _gasCost, _joinAddr, false); lendingPool.flashLoan(MCD_SAVER_FLASH_LOAN, DAI_ADDRESS, loanAmount, paramsData); manager.cdpAllow(_cdpId, MCD_SAVER_FLASH_LOAN, 0); } function repayWithLoan( SaverExchangeCore.ExchangeData memory _exchangeData, uint _cdpId, uint _gasCost, address _joinAddr ) public payable burnGas(25) { uint256 maxColl = getMaxCollateral(_cdpId, manager.ilks(_cdpId), _joinAddr); if (maxColl >= _exchangeData.srcAmount) { repay(_exchangeData, _cdpId, _gasCost, _joinAddr); return; } MCD_SAVER_FLASH_LOAN.transfer(msg.value); // 0x fee uint256 loanAmount = sub(_exchangeData.srcAmount, maxColl); uint maxLiq = getAvailableLiquidity(_joinAddr); loanAmount = loanAmount > maxLiq ? maxLiq : loanAmount; manager.cdpAllow(_cdpId, MCD_SAVER_FLASH_LOAN, 1); bytes memory paramsData = abi.encode(packExchangeData(_exchangeData), _cdpId, _gasCost, _joinAddr, true); lendingPool.flashLoan(MCD_SAVER_FLASH_LOAN, getAaveCollAddr(_joinAddr), loanAmount, paramsData); manager.cdpAllow(_cdpId, MCD_SAVER_FLASH_LOAN, 0); } /// @notice Gets the maximum amount of debt available to generate /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP function getMaxDebt(uint256 _cdpId, bytes32 _ilk) public override view returns (uint256) { uint256 price = getPrice(_ilk); (, uint256 mat) = spotter.ilks(_ilk); (uint256 collateral, uint256 debt) = getCdpInfo(manager, _cdpId, _ilk); return sub(wdiv(wmul(collateral, price), mat), debt); } function getAaveCollAddr(address _joinAddr) internal view returns (address) { if (_joinAddr == 0x2F0b23f53734252Bda2277357e97e1517d6B042A || _joinAddr == 0x775787933e92b709f2a3C70aa87999696e74A9F8) { return KYBER_ETH_ADDRESS; } else if (_joinAddr == DAI_JOIN_ADDRESS) { return DAI_ADDRESS; } else { return getCollateralAddr(_joinAddr); } } function getAvailableLiquidity(address _joinAddr) internal view returns (uint liquidity) { address tokenAddr = getAaveCollAddr(_joinAddr); if (tokenAddr == KYBER_ETH_ADDRESS) { liquidity = AAVE_POOL_CORE.balance; } else { liquidity = ERC20(tokenAddr).balanceOf(AAVE_POOL_CORE); } } function _packData( uint _cdpId, uint _gasCost, address _joinAddr, SaverExchangeCore.ExchangeData memory exchangeData ) internal pure returns (uint[6] memory numData, address[5] memory addrData, bytes memory callData) { numData = [ exchangeData.srcAmount, exchangeData.destAmount, exchangeData.minPrice, exchangeData.price0x, _cdpId, _gasCost ]; addrData = [ exchangeData.srcAddr, exchangeData.destAddr, exchangeData.exchangeAddr, exchangeData.wrapper, _joinAddr ]; callData = exchangeData.callData; } } contract SavingsProxy is DSRSavingsProtocol, CompoundSavingsProtocol { address public constant ADAI_ADDRESS = 0xfC1E690f61EFd961294b3e1Ce3313fBD8aa4f85d; address public constant SAVINGS_DYDX_ADDRESS = 0x03b1565e070df392e48e7a8e01798C4B00E534A5; address public constant SAVINGS_AAVE_ADDRESS = 0x535B9035E9bA8D7efe0FeAEac885fb65b303E37C; address public constant NEW_IDAI_ADDRESS = 0x493C57C4763932315A328269E1ADaD09653B9081; address public constant COMP_ADDRESS = 0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B; address public constant SAVINGS_LOGGER_ADDRESS = 0x89b3635BD2bAD145C6f92E82C9e83f06D5654984; address public constant SOLO_MARGIN_ADDRESS = 0x1E0447b19BB6EcFdAe1e4AE1694b0C3659614e4e; enum SavingsProtocol {Compound, Dydx, Fulcrum, Dsr, Aave} function deposit(SavingsProtocol _protocol, uint256 _amount) public { if (_protocol == SavingsProtocol.Dsr) { dsrDeposit(_amount, true); } else if (_protocol == SavingsProtocol.Compound) { compDeposit(msg.sender, _amount); } else { _deposit(_protocol, _amount, true); } SavingsLogger(SAVINGS_LOGGER_ADDRESS).logDeposit(msg.sender, uint8(_protocol), _amount); } function withdraw(SavingsProtocol _protocol, uint256 _amount) public { if (_protocol == SavingsProtocol.Dsr) { dsrWithdraw(_amount, true); } else if (_protocol == SavingsProtocol.Compound) { compWithdraw(msg.sender, _amount); } else { _withdraw(_protocol, _amount, true); } SavingsLogger(SAVINGS_LOGGER_ADDRESS).logWithdraw(msg.sender, uint8(_protocol), _amount); } function swap(SavingsProtocol _from, SavingsProtocol _to, uint256 _amount) public { if (_from == SavingsProtocol.Dsr) { dsrWithdraw(_amount, false); } else if (_from == SavingsProtocol.Compound) { compWithdraw(msg.sender, _amount); } else { _withdraw(_from, _amount, false); } // possible to withdraw 1-2 wei less than actual amount due to division precision // so we deposit all amount on DSProxy uint256 amountToDeposit = ERC20(DAI_ADDRESS).balanceOf(address(this)); if (_to == SavingsProtocol.Dsr) { dsrDeposit(amountToDeposit, false); } else if (_from == SavingsProtocol.Compound) { compDeposit(msg.sender, _amount); } else { _deposit(_to, amountToDeposit, false); } SavingsLogger(SAVINGS_LOGGER_ADDRESS).logSwap( msg.sender, uint8(_from), uint8(_to), _amount ); } function withdrawDai() public { ERC20(DAI_ADDRESS).transfer(msg.sender, ERC20(DAI_ADDRESS).balanceOf(address(this))); } function claimComp() public { ComptrollerInterface(COMP_ADDRESS).claimComp(address(this)); } function getAddress(SavingsProtocol _protocol) public pure returns (address) { if (_protocol == SavingsProtocol.Dydx) { return SAVINGS_DYDX_ADDRESS; } if (_protocol == SavingsProtocol.Aave) { return SAVINGS_AAVE_ADDRESS; } } function _deposit(SavingsProtocol _protocol, uint256 _amount, bool _fromUser) internal { if (_fromUser) { ERC20(DAI_ADDRESS).transferFrom(msg.sender, address(this), _amount); } approveDeposit(_protocol); ProtocolInterface(getAddress(_protocol)).deposit(address(this), _amount); endAction(_protocol); } function _withdraw(SavingsProtocol _protocol, uint256 _amount, bool _toUser) public { approveWithdraw(_protocol); ProtocolInterface(getAddress(_protocol)).withdraw(address(this), _amount); endAction(_protocol); if (_toUser) { withdrawDai(); } } function endAction(SavingsProtocol _protocol) internal { if (_protocol == SavingsProtocol.Dydx) { setDydxOperator(false); } } function approveDeposit(SavingsProtocol _protocol) internal { if (_protocol == SavingsProtocol.Compound || _protocol == SavingsProtocol.Fulcrum || _protocol == SavingsProtocol.Aave) { ERC20(DAI_ADDRESS).approve(getAddress(_protocol), uint256(-1)); } if (_protocol == SavingsProtocol.Dydx) { ERC20(DAI_ADDRESS).approve(SOLO_MARGIN_ADDRESS, uint256(-1)); setDydxOperator(true); } } function approveWithdraw(SavingsProtocol _protocol) internal { if (_protocol == SavingsProtocol.Compound) { ERC20(NEW_CDAI_ADDRESS).approve(getAddress(_protocol), uint256(-1)); } if (_protocol == SavingsProtocol.Dydx) { setDydxOperator(true); } if (_protocol == SavingsProtocol.Fulcrum) { ERC20(NEW_IDAI_ADDRESS).approve(getAddress(_protocol), uint256(-1)); } if (_protocol == SavingsProtocol.Aave) { ERC20(ADAI_ADDRESS).approve(getAddress(_protocol), uint256(-1)); } } function setDydxOperator(bool _trusted) internal { ISoloMargin.OperatorArg[] memory operatorArgs = new ISoloMargin.OperatorArg[](1); operatorArgs[0] = ISoloMargin.OperatorArg({ operator: getAddress(SavingsProtocol.Dydx), trusted: _trusted }); ISoloMargin(SOLO_MARGIN_ADDRESS).setOperators(operatorArgs); } } contract LoanShifterReceiver is SaverExchangeCore, FlashLoanReceiverBase, AdminAuth { ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; ShifterRegistry public constant shifterRegistry = ShifterRegistry(0x2612Af3A521c2df9EAF28422Ca335b04AdF3ac66); struct ParamData { bytes proxyData1; bytes proxyData2; address proxy; address debtAddr; uint8 protocol1; uint8 protocol2; uint8 swapType; } constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public {} function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { // Format the call data for DSProxy (ParamData memory paramData, ExchangeData memory exchangeData) = packFunctionCall(_amount, _fee, _params); address protocolAddr1 = shifterRegistry.getAddr(getNameByProtocol(paramData.protocol1)); address protocolAddr2 = shifterRegistry.getAddr(getNameByProtocol(paramData.protocol2)); // Send Flash loan amount to DSProxy sendToProxy(payable(paramData.proxy), _reserve, _amount); // Execute the Close/Change debt operation DSProxyInterface(paramData.proxy).execute(protocolAddr1, paramData.proxyData1); if (paramData.swapType == 1) { // COLL_SWAP exchangeData.srcAmount = getBalance(exchangeData.srcAddr); (, uint amount) = _sell(exchangeData); sendToProxy(payable(paramData.proxy), exchangeData.destAddr, amount); } else if (paramData.swapType == 2) { // DEBT_SWAP exchangeData.destAmount = (_amount + _fee); _buy(exchangeData); // Send extra to DSProxy sendToProxy(payable(paramData.proxy), exchangeData.srcAddr, ERC20(exchangeData.srcAddr).balanceOf(address(this))); } else { // NO_SWAP just send tokens to proxy sendToProxy(payable(paramData.proxy), exchangeData.srcAddr, getBalance(exchangeData.srcAddr)); } // Execute the Open operation DSProxyInterface(paramData.proxy).execute(protocolAddr2, paramData.proxyData2); // Repay FL transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } } function packFunctionCall(uint _amount, uint _fee, bytes memory _params) internal pure returns (ParamData memory paramData, ExchangeData memory exchangeData) { ( uint[8] memory numData, // collAmount, debtAmount, id1, id2, srcAmount, destAmount, minPrice, price0x address[8] memory addrData, // addrLoan1, addrLoan2, debtAddr1, debtAddr2, srcAddr, destAddr, exchangeAddr, wrapper uint8[3] memory enumData, // fromProtocol, toProtocol, swapType bytes memory callData, address proxy ) = abi.decode(_params, (uint256[8],address[8],uint8[3],bytes,address)); bytes memory proxyData1; bytes memory proxyData2; uint openDebtAmount = (_amount + _fee); if (enumData[0] == 0) { // MAKER FROM proxyData1 = abi.encodeWithSignature("close(uint256,address,uint256,uint256)", numData[2], addrData[0], _amount, numData[0]); } else if(enumData[0] == 1) { // COMPOUND FROM if (enumData[2] == 2) { // DEBT_SWAP proxyData1 = abi.encodeWithSignature("changeDebt(address,address,uint256,uint256)", addrData[2], addrData[3], (_amount + _fee), numData[4]); } else { proxyData1 = abi.encodeWithSignature("close(address,address,uint256,uint256)", addrData[0], addrData[2], numData[0], numData[1]); } } if (enumData[1] == 0) { // MAKER TO proxyData2 = abi.encodeWithSignature("open(uint256,address,uint256)", numData[3], addrData[1], openDebtAmount); } else if(enumData[1] == 1) { // COMPOUND TO if (enumData[2] == 2) { // DEBT_SWAP proxyData2 = abi.encodeWithSignature("repayAll(address)", addrData[3]); } else { proxyData2 = abi.encodeWithSignature("open(address,address,uint256)", addrData[1], addrData[3], openDebtAmount); } } paramData = ParamData({ proxyData1: proxyData1, proxyData2: proxyData2, proxy: proxy, debtAddr: addrData[2], protocol1: enumData[0], protocol2: enumData[1], swapType: enumData[2] }); exchangeData = SaverExchangeCore.ExchangeData({ srcAddr: addrData[4], destAddr: addrData[5], srcAmount: numData[4], destAmount: numData[5], minPrice: numData[6], wrapper: addrData[7], exchangeAddr: addrData[6], callData: callData, price0x: numData[7] }); } function sendToProxy(address payable _proxy, address _reserve, uint _amount) internal { if (_reserve != ETH_ADDRESS) { ERC20(_reserve).safeTransfer(_proxy, _amount); } _proxy.transfer(address(this).balance); } function getNameByProtocol(uint8 _proto) internal pure returns (string memory) { if (_proto == 0) { return "MCD_SHIFTER"; } else if (_proto == 1) { return "COMP_SHIFTER"; } } receive() external override(FlashLoanReceiverBase, SaverExchangeCore) payable {} } contract CompShifter is CompoundSaverHelper { address public constant COMPTROLLER_ADDR = 0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B; function getWholeDebt(uint _cdpId, address _joinAddr) public virtual returns(uint loanAmount) { return CTokenInterface(_joinAddr).borrowBalanceCurrent(msg.sender); } function close( address _cCollAddr, address _cBorrowAddr, uint _collAmount, uint _debtAmount ) public { address collAddr = getUnderlyingAddr(_cCollAddr); // payback debt paybackDebt(_debtAmount, _cBorrowAddr, getUnderlyingAddr(_cBorrowAddr), tx.origin); // draw coll if (CTokenInterface(_cBorrowAddr).borrowBalanceCurrent(address(this)) == 0) { uint cTokenBalance = CTokenInterface(_cCollAddr).balanceOf(address(this)); require(CTokenInterface(_cCollAddr).redeem(cTokenBalance) == 0); } else { require(CTokenInterface(_cCollAddr).redeemUnderlying(_collAmount) == 0); } // Send back money to repay FL if (collAddr == ETH_ADDRESS) { msg.sender.transfer(address(this).balance); } else { ERC20(collAddr).transfer(msg.sender, ERC20(collAddr).balanceOf(address(this))); } } function changeDebt( address _cBorrowAddrOld, address _cBorrowAddrNew, uint _debtAmountOld, uint _debtAmountNew ) public { address borrowAddrNew = getUnderlyingAddr(_cBorrowAddrNew); // payback debt in one token paybackDebt(_debtAmountOld, _cBorrowAddrOld, getUnderlyingAddr(_cBorrowAddrOld), tx.origin); // draw debt in another one borrowCompound(_cBorrowAddrNew, _debtAmountNew); // Send back money to repay FL if (borrowAddrNew == ETH_ADDRESS) { msg.sender.transfer(address(this).balance); } else { ERC20(borrowAddrNew).transfer(msg.sender, ERC20(borrowAddrNew).balanceOf(address(this))); } } function open( address _cCollAddr, address _cBorrowAddr, uint _debtAmount ) public { address collAddr = getUnderlyingAddr(_cCollAddr); address borrowAddr = getUnderlyingAddr(_cBorrowAddr); uint collAmount = 0; if (collAddr == ETH_ADDRESS) { collAmount = address(this).balance; } else { collAmount = ERC20(collAddr).balanceOf(address(this)); } depositCompound(collAddr, _cCollAddr, collAmount); // draw debt borrowCompound(_cBorrowAddr, _debtAmount); // Send back money to repay FL if (borrowAddr == ETH_ADDRESS) { msg.sender.transfer(address(this).balance); } else { ERC20(borrowAddr).transfer(msg.sender, ERC20(borrowAddr).balanceOf(address(this))); } } function repayAll(address _cTokenAddr) public { address tokenAddr = getUnderlyingAddr(_cTokenAddr); uint amount = ERC20(tokenAddr).balanceOf(address(this)); if (amount != 0) { paybackDebt(amount, _cTokenAddr, tokenAddr, tx.origin); } } function depositCompound(address _tokenAddr, address _cTokenAddr, uint _amount) internal { approveCToken(_tokenAddr, _cTokenAddr); enterMarket(_cTokenAddr); if (_tokenAddr != ETH_ADDRESS) { require(CTokenInterface(_cTokenAddr).mint(_amount) == 0, "mint error"); } else { CEtherInterface(_cTokenAddr).mint{value: _amount}(); } } function borrowCompound(address _cTokenAddr, uint _amount) internal { enterMarket(_cTokenAddr); require(CTokenInterface(_cTokenAddr).borrow(_amount) == 0); } function enterMarket(address _cTokenAddr) public { address[] memory markets = new address[](1); markets[0] = _cTokenAddr; ComptrollerInterface(COMPTROLLER_ADDR).enterMarkets(markets); } } contract McdShifter is MCDSaverProxy { address public constant OPEN_PROXY_ACTIONS = 0x6d0984E80a86f26c0dd564ca0CF74a8E9Da03305; function getLoanAmount(uint _cdpId, address _joinAddr) public view virtual returns(uint loanAmount) { bytes32 ilk = manager.ilks(_cdpId); (, uint rate,,,) = vat.ilks(ilk); (, uint art) = vat.urns(ilk, manager.urns(_cdpId)); uint dai = vat.dai(manager.urns(_cdpId)); uint rad = sub(mul(art, rate), dai); loanAmount = rad / RAY; loanAmount = mul(loanAmount, RAY) < rad ? loanAmount + 1 : loanAmount; } function close( uint _cdpId, address _joinAddr, uint _loanAmount, uint _collateral ) public { address owner = getOwner(manager, _cdpId); bytes32 ilk = manager.ilks(_cdpId); (uint maxColl, ) = getCdpInfo(manager, _cdpId, ilk); // repay dai debt cdp paybackDebt(_cdpId, ilk, _loanAmount, owner); maxColl = _collateral > maxColl ? maxColl : _collateral; // withdraw collateral from cdp drawMaxCollateral(_cdpId, _joinAddr, maxColl); // send back to msg.sender if (_joinAddr == ETH_JOIN_ADDRESS) { msg.sender.transfer(address(this).balance); } else { ERC20 collToken = ERC20(getCollateralAddr(_joinAddr)); collToken.transfer(msg.sender, collToken.balanceOf(address(this))); } } function open( uint _cdpId, address _joinAddr, uint _debtAmount ) public { uint collAmount = 0; if (_joinAddr == ETH_JOIN_ADDRESS) { collAmount = address(this).balance; } else { collAmount = ERC20(address(Join(_joinAddr).gem())).balanceOf(address(this)); } if (_cdpId == 0) { openAndWithdraw(collAmount, _debtAmount, address(this), _joinAddr); } else { // add collateral addCollateral(_cdpId, _joinAddr, collAmount); // draw debt drawDai(_cdpId, manager.ilks(_cdpId), _debtAmount); } // transfer to repay FL ERC20(DAI_ADDRESS).transfer(msg.sender, ERC20(DAI_ADDRESS).balanceOf(address(this))); if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } } function openAndWithdraw(uint _collAmount, uint _debtAmount, address _proxy, address _joinAddrTo) internal { bytes32 ilk = Join(_joinAddrTo).ilk(); if (_joinAddrTo == ETH_JOIN_ADDRESS) { MCDCreateProxyActions(OPEN_PROXY_ACTIONS).openLockETHAndDraw{value: address(this).balance}( address(manager), JUG_ADDRESS, ETH_JOIN_ADDRESS, DAI_JOIN_ADDRESS, ilk, _debtAmount, _proxy ); } else { ERC20(getCollateralAddr(_joinAddrTo)).approve(OPEN_PROXY_ACTIONS, uint256(-1)); MCDCreateProxyActions(OPEN_PROXY_ACTIONS).openLockGemAndDraw( address(manager), JUG_ADDRESS, _joinAddrTo, DAI_JOIN_ADDRESS, ilk, _collAmount, _debtAmount, true, _proxy ); } } function drawMaxCollateral(uint _cdpId, address _joinAddr, uint _amount) internal returns (uint) { manager.frob(_cdpId, -toPositiveInt(_amount), 0); manager.flux(_cdpId, address(this), _amount); uint joinAmount = _amount; if (Join(_joinAddr).dec() != 18) { joinAmount = _amount / (10 ** (18 - Join(_joinAddr).dec())); } Join(_joinAddr).exit(address(this), joinAmount); if (_joinAddr == ETH_JOIN_ADDRESS) { Join(_joinAddr).gem().withdraw(joinAmount); // Weth -> Eth } return joinAmount; } } contract AaveSaverProxy is GasBurner, SaverExchangeCore, AaveHelper { address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; uint public constant VARIABLE_RATE = 2; function repay(ExchangeData memory _data, uint _gasCost) public payable burnGas(20) { address lendingPoolCore = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); address payable user = payable(getUserAddress()); uint256 maxCollateral = getMaxCollateral(_data.srcAddr, address(this)); // don't swap more than maxCollateral _data.srcAmount = _data.srcAmount > maxCollateral ? maxCollateral : _data.srcAmount; // redeem collateral address aTokenCollateral = ILendingPool(lendingPoolCore).getReserveATokenAddress(_data.srcAddr); IAToken(aTokenCollateral).redeem(_data.srcAmount); uint256 destAmount = _data.srcAmount; if (_data.srcAddr != _data.destAddr) { // swap (, destAmount) = _sell(_data); destAmount -= getFee(destAmount, user, _gasCost, _data.destAddr); } else { destAmount -= getGasCost(destAmount, user, _gasCost, _data.destAddr); } // payback if (_data.destAddr == ETH_ADDR) { ILendingPool(lendingPool).repay{value: destAmount}(_data.destAddr, destAmount, payable(address(this))); } else { approveToken(_data.destAddr, lendingPoolCore); ILendingPool(lendingPool).repay(_data.destAddr, destAmount, payable(address(this))); } // first return 0x fee to msg.sender as it is the address that actually sent 0x fee sendContractBalance(ETH_ADDR, tx.origin, min(address(this).balance, msg.value)); // send all leftovers from dest addr to proxy owner sendFullContractBalance(_data.destAddr, user); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "AaveRepay", abi.encode(_data.srcAddr, _data.destAddr, _data.srcAmount, destAmount)); } function boost(ExchangeData memory _data, uint _gasCost) public payable burnGas(20) { address lendingPoolCore = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); (,,,,,,,,,bool collateralEnabled) = ILendingPool(lendingPool).getUserReserveData(_data.destAddr, address(this)); address payable user = payable(getUserAddress()); uint256 maxBorrow = getMaxBorrow(_data.srcAddr, address(this)); _data.srcAmount = _data.srcAmount > maxBorrow ? maxBorrow : _data.srcAmount; // borrow amount ILendingPool(lendingPool).borrow(_data.srcAddr, _data.srcAmount, VARIABLE_RATE, AAVE_REFERRAL_CODE); uint256 destAmount; if (_data.destAddr != _data.srcAddr) { _data.srcAmount -= getFee(_data.srcAmount, user, _gasCost, _data.srcAddr); // swap (, destAmount) = _sell(_data); } else { _data.srcAmount -= getGasCost(_data.srcAmount, user, _gasCost, _data.srcAddr); destAmount = _data.srcAmount; } if (_data.destAddr == ETH_ADDR) { ILendingPool(lendingPool).deposit{value: destAmount}(_data.destAddr, destAmount, AAVE_REFERRAL_CODE); } else { approveToken(_data.destAddr, lendingPoolCore); ILendingPool(lendingPool).deposit(_data.destAddr, destAmount, AAVE_REFERRAL_CODE); } if (!collateralEnabled) { ILendingPool(lendingPool).setUserUseReserveAsCollateral(_data.destAddr, true); } // returning to msg.sender as it is the address that actually sent 0x fee sendContractBalance(ETH_ADDR, tx.origin, min(address(this).balance, msg.value)); // send all leftovers from dest addr to proxy owner sendFullContractBalance(_data.destAddr, user); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "AaveBoost", abi.encode(_data.srcAddr, _data.destAddr, _data.srcAmount, destAmount)); } } contract CompoundLoanInfo is CompoundSafetyRatio { struct LoanData { address user; uint128 ratio; address[] collAddr; address[] borrowAddr; uint[] collAmounts; uint[] borrowAmounts; } struct TokenInfo { address cTokenAddress; address underlyingTokenAddress; uint collateralFactor; uint price; } struct TokenInfoFull { address underlyingTokenAddress; uint supplyRate; uint borrowRate; uint exchangeRate; uint marketLiquidity; uint totalSupply; uint totalBorrow; uint collateralFactor; uint price; } address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant CETH_ADDRESS = 0x4Ddc2D193948926D02f9B1fE9e1daa0718270ED5; /// @notice Calcualted the ratio of coll/debt for a compound user /// @param _user Address of the user function getRatio(address _user) public view returns (uint) { // For each asset the account is in return getSafetyRatio(_user); } /// @notice Fetches Compound prices for tokens /// @param _cTokens Arr. of cTokens for which to get the prices /// @return prices Array of prices function getPrices(address[] memory _cTokens) public view returns (uint[] memory prices) { prices = new uint[](_cTokens.length); address oracleAddr = comp.oracle(); for (uint i = 0; i < _cTokens.length; ++i) { prices[i] = CompoundOracleInterface(oracleAddr).getUnderlyingPrice(_cTokens[i]); } } /// @notice Fetches Compound collateral factors for tokens /// @param _cTokens Arr. of cTokens for which to get the coll. factors /// @return collFactors Array of coll. factors function getCollFactors(address[] memory _cTokens) public view returns (uint[] memory collFactors) { collFactors = new uint[](_cTokens.length); for (uint i = 0; i < _cTokens.length; ++i) { (, collFactors[i]) = comp.markets(_cTokens[i]); } } /// @notice Fetches all the collateral/debt address and amounts, denominated in usd /// @param _user Address of the user /// @return data LoanData information function getLoanData(address _user) public view returns (LoanData memory data) { address[] memory assets = comp.getAssetsIn(_user); address oracleAddr = comp.oracle(); data = LoanData({ user: _user, ratio: 0, collAddr: new address[](assets.length), borrowAddr: new address[](assets.length), collAmounts: new uint[](assets.length), borrowAmounts: new uint[](assets.length) }); uint collPos = 0; uint borrowPos = 0; for (uint i = 0; i < assets.length; i++) { address asset = assets[i]; (, uint cTokenBalance, uint borrowBalance, uint exchangeRateMantissa) = CTokenInterface(asset).getAccountSnapshot(_user); Exp memory oraclePrice; if (cTokenBalance != 0 || borrowBalance != 0) { oraclePrice = Exp({mantissa: CompoundOracleInterface(oracleAddr).getUnderlyingPrice(asset)}); } // Sum up collateral in Usd if (cTokenBalance != 0) { Exp memory exchangeRate = Exp({mantissa: exchangeRateMantissa}); (, Exp memory tokensToUsd) = mulExp(exchangeRate, oraclePrice); data.collAddr[collPos] = asset; (, data.collAmounts[collPos]) = mulScalarTruncate(tokensToUsd, cTokenBalance); collPos++; } // Sum up debt in Usd if (borrowBalance != 0) { data.borrowAddr[borrowPos] = asset; (, data.borrowAmounts[borrowPos]) = mulScalarTruncate(oraclePrice, borrowBalance); borrowPos++; } } data.ratio = uint128(getSafetyRatio(_user)); return data; } function getTokenBalances(address _user, address[] memory _cTokens) public view returns (uint[] memory balances, uint[] memory borrows) { balances = new uint[](_cTokens.length); borrows = new uint[](_cTokens.length); for (uint i = 0; i < _cTokens.length; i++) { address asset = _cTokens[i]; (, uint cTokenBalance, uint borrowBalance, uint exchangeRateMantissa) = CTokenInterface(asset).getAccountSnapshot(_user); Exp memory exchangeRate = Exp({mantissa: exchangeRateMantissa}); (, balances[i]) = mulScalarTruncate(exchangeRate, cTokenBalance); borrows[i] = borrowBalance; } } /// @notice Fetches all the collateral/debt address and amounts, denominated in usd /// @param _users Addresses of the user /// @return loans Array of LoanData information function getLoanDataArr(address[] memory _users) public view returns (LoanData[] memory loans) { loans = new LoanData[](_users.length); for (uint i = 0; i < _users.length; ++i) { loans[i] = getLoanData(_users[i]); } } /// @notice Calcualted the ratio of coll/debt for a compound user /// @param _users Addresses of the user /// @return ratios Array of ratios function getRatios(address[] memory _users) public view returns (uint[] memory ratios) { ratios = new uint[](_users.length); for (uint i = 0; i < _users.length; ++i) { ratios[i] = getSafetyRatio(_users[i]); } } /// @notice Information about cTokens /// @param _cTokenAddresses Array of cTokens addresses /// @return tokens Array of cTokens infomartion function getTokensInfo(address[] memory _cTokenAddresses) public returns(TokenInfo[] memory tokens) { tokens = new TokenInfo[](_cTokenAddresses.length); address oracleAddr = comp.oracle(); for (uint i = 0; i < _cTokenAddresses.length; ++i) { (, uint collFactor) = comp.markets(_cTokenAddresses[i]); tokens[i] = TokenInfo({ cTokenAddress: _cTokenAddresses[i], underlyingTokenAddress: getUnderlyingAddr(_cTokenAddresses[i]), collateralFactor: collFactor, price: CompoundOracleInterface(oracleAddr).getUnderlyingPrice(_cTokenAddresses[i]) }); } } /// @notice Information about cTokens /// @param _cTokenAddresses Array of cTokens addresses /// @return tokens Array of cTokens infomartion function getFullTokensInfo(address[] memory _cTokenAddresses) public returns(TokenInfoFull[] memory tokens) { tokens = new TokenInfoFull[](_cTokenAddresses.length); address oracleAddr = comp.oracle(); for (uint i = 0; i < _cTokenAddresses.length; ++i) { (, uint collFactor) = comp.markets(_cTokenAddresses[i]); CTokenInterface cToken = CTokenInterface(_cTokenAddresses[i]); tokens[i] = TokenInfoFull({ underlyingTokenAddress: getUnderlyingAddr(_cTokenAddresses[i]), supplyRate: cToken.supplyRatePerBlock(), borrowRate: cToken.borrowRatePerBlock(), exchangeRate: cToken.exchangeRateCurrent(), marketLiquidity: cToken.getCash(), totalSupply: cToken.totalSupply(), totalBorrow: cToken.totalBorrowsCurrent(), collateralFactor: collFactor, price: CompoundOracleInterface(oracleAddr).getUnderlyingPrice(_cTokenAddresses[i]) }); } } /// @notice Returns the underlying address of the cToken asset /// @param _cTokenAddress cToken address /// @return Token address of the cToken specified function getUnderlyingAddr(address _cTokenAddress) internal returns (address) { if (_cTokenAddress == CETH_ADDRESS) { return ETH_ADDRESS; } else { return CTokenInterface(_cTokenAddress).underlying(); } } } contract CompoundCreateReceiver is FlashLoanReceiverBase, SaverExchangeCore { ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); ShifterRegistry public constant shifterRegistry = ShifterRegistry(0x2E82103bD91053C781aaF39da17aE58ceE39d0ab); address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address payable public constant WALLET_ADDR = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; address public constant DISCOUNT_ADDR = 0x1b14E8D511c9A4395425314f849bD737BAF8208F; // solhint-disable-next-line no-empty-blocks constructor() public FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) {} /// @notice Called by Aave when sending back the FL amount /// @param _reserve The address of the borrowed token /// @param _amount Amount of FL tokens received /// @param _fee FL Aave fee /// @param _params The params that are sent from the original FL caller contract function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { // Format the call data for DSProxy (address payable proxyAddr, bytes memory proxyData, ExchangeData memory exchangeData) = packFunctionCall(_amount, _fee, _params); // Swap (, uint sellAmount) = _sell(exchangeData); // DFS fee getFee(sellAmount, exchangeData.destAddr, proxyAddr); // Send amount to DSProxy sendToProxy(proxyAddr, exchangeData.destAddr); address compOpenProxy = shifterRegistry.getAddr("COMP_SHIFTER"); // Execute the DSProxy call DSProxyInterface(proxyAddr).execute(compOpenProxy, proxyData); // Repay the loan with the money DSProxy sent back transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { // solhint-disable-next-line avoid-tx-origin tx.origin.transfer(address(this).balance); } } /// @notice Formats function data call so we can call it through DSProxy /// @param _amount Amount of FL /// @param _fee Fee of the FL /// @param _params Saver proxy params function packFunctionCall(uint _amount, uint _fee, bytes memory _params) internal pure returns (address payable, bytes memory proxyData, ExchangeData memory exchangeData) { ( uint[4] memory numData, // srcAmount, destAmount, minPrice, price0x address[6] memory cAddresses, // cCollAddr, cDebtAddr, srcAddr, destAddr, exchangeAddr, wrapper bytes memory callData, address proxy ) = abi.decode(_params, (uint256[4],address[6],bytes,address)); proxyData = abi.encodeWithSignature( "open(address,address,uint256)", cAddresses[0], cAddresses[1], (_amount + _fee)); exchangeData = SaverExchangeCore.ExchangeData({ srcAddr: cAddresses[2], destAddr: cAddresses[3], srcAmount: numData[0], destAmount: numData[1], minPrice: numData[2], wrapper: cAddresses[5], exchangeAddr: cAddresses[4], callData: callData, price0x: numData[3] }); return (payable(proxy), proxyData, exchangeData); } /// @notice Send the FL funds received to DSProxy /// @param _proxy DSProxy address /// @param _reserve Token address function sendToProxy(address payable _proxy, address _reserve) internal { if (_reserve != ETH_ADDRESS) { ERC20(_reserve).safeTransfer(_proxy, ERC20(_reserve).balanceOf(address(this))); } else { _proxy.transfer(address(this).balance); } } function getFee(uint _amount, address _tokenAddr, address _proxy) internal returns (uint feeAmount) { uint fee = 400; DSProxy proxy = DSProxy(payable(_proxy)); address user = proxy.owner(); if (Discount(DISCOUNT_ADDR).isCustomFeeSet(user)) { fee = Discount(DISCOUNT_ADDR).getCustomServiceFee(user); } feeAmount = (fee == 0) ? 0 : (_amount / fee); // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } if (_tokenAddr == ETH_ADDRESS) { WALLET_ADDR.transfer(feeAmount); } else { ERC20(_tokenAddr).safeTransfer(WALLET_ADDR, feeAmount); } } // solhint-disable-next-line no-empty-blocks receive() external override(FlashLoanReceiverBase, SaverExchangeCore) payable {} } contract CompoundSaverFlashLoan is FlashLoanReceiverBase, SaverExchangeCore { ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); address payable public COMPOUND_SAVER_FLASH_PROXY = 0xcEAb38B5C88F33Dabe4D31BDD384E08215526632; address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public owner; using SafeERC20 for ERC20; constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public { owner = msg.sender; } /// @notice Called by Aave when sending back the FL amount /// @param _reserve The address of the borrowed token /// @param _amount Amount of FL tokens received /// @param _fee FL Aave fee /// @param _params The params that are sent from the original FL caller contract function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { // Format the call data for DSProxy (bytes memory proxyData, address payable proxyAddr) = packFunctionCall(_amount, _fee, _params); // Send Flash loan amount to DSProxy sendLoanToProxy(proxyAddr, _reserve, _amount); // Execute the DSProxy call DSProxyInterface(proxyAddr).execute(COMPOUND_SAVER_FLASH_PROXY, proxyData); // Repay the loan with the money DSProxy sent back transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } } /// @notice Formats function data call so we can call it through DSProxy /// @param _amount Amount of FL /// @param _fee Fee of the FL /// @param _params Saver proxy params /// @return proxyData Formated function call data function packFunctionCall(uint _amount, uint _fee, bytes memory _params) internal pure returns (bytes memory proxyData, address payable) { ( bytes memory exDataBytes, address[2] memory cAddresses, // cCollAddress, cBorrowAddress uint256 gasCost, bool isRepay, address payable proxyAddr ) = abi.decode(_params, (bytes,address[2],uint256,bool,address)); ExchangeData memory _exData = unpackExchangeData(exDataBytes); uint[2] memory flashLoanData = [_amount, _fee]; if (isRepay) { proxyData = abi.encodeWithSignature("flashRepay((address,address,uint256,uint256,uint256,address,address,bytes,uint256),address[2],uint256,uint256[2])", _exData, cAddresses, gasCost, flashLoanData); } else { proxyData = abi.encodeWithSignature("flashBoost((address,address,uint256,uint256,uint256,address,address,bytes,uint256),address[2],uint256,uint256[2])", _exData, cAddresses, gasCost, flashLoanData); } return (proxyData, proxyAddr); } /// @notice Send the FL funds received to DSProxy /// @param _proxy DSProxy address /// @param _reserve Token address /// @param _amount Amount of tokens function sendLoanToProxy(address payable _proxy, address _reserve, uint _amount) internal { if (_reserve != ETH_ADDRESS) { ERC20(_reserve).safeTransfer(_proxy, _amount); } _proxy.transfer(address(this).balance); } receive() external override(SaverExchangeCore, FlashLoanReceiverBase) payable {} } contract CompoundSaverFlashProxy is SaverExchangeCore, CompoundSaverHelper { address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; using SafeERC20 for ERC20; /// @notice Repays the position and sends tokens back for FL /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress] /// @param _gasCost Gas cost for transaction /// @param _flashLoanData Data about FL [amount, fee] function flashRepay( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost, uint[2] memory _flashLoanData // amount, fee ) public payable { enterMarket(_cAddresses[0], _cAddresses[1]); address payable user = payable(getUserAddress()); uint flashBorrowed = _flashLoanData[0] + _flashLoanData[1]; uint maxColl = getMaxCollateral(_cAddresses[0], address(this)); // draw max coll require(CTokenInterface(_cAddresses[0]).redeemUnderlying(maxColl) == 0); address collToken = getUnderlyingAddr(_cAddresses[0]); address borrowToken = getUnderlyingAddr(_cAddresses[1]); uint swapAmount = 0; if (collToken != borrowToken) { // swap max coll + loanAmount _exData.srcAmount = maxColl + _flashLoanData[0]; (,swapAmount) = _sell(_exData); // get fee swapAmount -= getFee(swapAmount, user, _gasCost, _cAddresses[1]); } else { swapAmount = (maxColl + _flashLoanData[0]); swapAmount -= getGasCost(swapAmount, _gasCost, _cAddresses[1]); } // payback debt paybackDebt(swapAmount, _cAddresses[1], borrowToken, user); // draw collateral for loanAmount + loanFee require(CTokenInterface(_cAddresses[0]).redeemUnderlying(flashBorrowed) == 0); // repay flash loan returnFlashLoan(collToken, flashBorrowed); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "CompoundRepay", abi.encode(_exData.srcAmount, swapAmount, collToken, borrowToken)); } /// @notice Boosts the position and sends tokens back for FL /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress] /// @param _gasCost Gas cost for specific transaction /// @param _flashLoanData Data about FL [amount, fee] function flashBoost( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost, uint[2] memory _flashLoanData // amount, fee ) public payable { enterMarket(_cAddresses[0], _cAddresses[1]); address payable user = payable(getUserAddress()); uint flashBorrowed = _flashLoanData[0] + _flashLoanData[1]; // borrow max amount uint borrowAmount = getMaxBorrow(_cAddresses[1], address(this)); require(CTokenInterface(_cAddresses[1]).borrow(borrowAmount) == 0); address collToken = getUnderlyingAddr(_cAddresses[0]); address borrowToken = getUnderlyingAddr(_cAddresses[1]); uint swapAmount = 0; if (collToken != borrowToken) { // get dfs fee borrowAmount -= getFee((borrowAmount + _flashLoanData[0]), user, _gasCost, _cAddresses[1]); _exData.srcAmount = (borrowAmount + _flashLoanData[0]); (,swapAmount) = _sell(_exData); } else { swapAmount = (borrowAmount + _flashLoanData[0]); swapAmount -= getGasCost(swapAmount, _gasCost, _cAddresses[1]); } // deposit swaped collateral depositCollateral(collToken, _cAddresses[0], swapAmount); // borrow token to repay flash loan require(CTokenInterface(_cAddresses[1]).borrow(flashBorrowed) == 0); // repay flash loan returnFlashLoan(borrowToken, flashBorrowed); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "CompoundBoost", abi.encode(_exData.srcAmount, swapAmount, collToken, borrowToken)); } /// @notice Helper method to deposit tokens in Compound /// @param _collToken Token address of the collateral /// @param _cCollToken CToken address of the collateral /// @param _depositAmount Amount to deposit function depositCollateral(address _collToken, address _cCollToken, uint _depositAmount) internal { approveCToken(_collToken, _cCollToken); if (_collToken != ETH_ADDRESS) { require(CTokenInterface(_cCollToken).mint(_depositAmount) == 0); } else { CEtherInterface(_cCollToken).mint{value: _depositAmount}(); // reverts on fail } } /// @notice Returns the tokens/ether to the msg.sender which is the FL contract /// @param _tokenAddr Address of token which we return /// @param _amount Amount to return function returnFlashLoan(address _tokenAddr, uint _amount) internal { if (_tokenAddr != ETH_ADDRESS) { ERC20(_tokenAddr).safeTransfer(msg.sender, _amount); } msg.sender.transfer(address(this).balance); } } contract CompoundSaverProxy is CompoundSaverHelper, SaverExchangeCore { DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); /// @notice Withdraws collateral, converts to borrowed token and repays debt /// @dev Called through the DSProxy /// @param _exData Exchange data /// @param _cAddresses Coll/Debt addresses [cCollAddress, cBorrowAddress] /// @param _gasCost Gas cost for specific transaction function repay( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost ) public payable { enterMarket(_cAddresses[0], _cAddresses[1]); address payable user = payable(getUserAddress()); uint maxColl = getMaxCollateral(_cAddresses[0], address(this)); uint collAmount = (_exData.srcAmount > maxColl) ? maxColl : _exData.srcAmount; require(CTokenInterface(_cAddresses[0]).redeemUnderlying(collAmount) == 0); address collToken = getUnderlyingAddr(_cAddresses[0]); address borrowToken = getUnderlyingAddr(_cAddresses[1]); uint swapAmount = 0; if (collToken != borrowToken) { (, swapAmount) = _sell(_exData); swapAmount -= getFee(swapAmount, user, _gasCost, _cAddresses[1]); } else { swapAmount = collAmount; swapAmount -= getGasCost(swapAmount, _gasCost, _cAddresses[1]); } paybackDebt(swapAmount, _cAddresses[1], borrowToken, user); // handle 0x fee tx.origin.transfer(address(this).balance); // log amount, collToken, borrowToken logger.Log(address(this), msg.sender, "CompoundRepay", abi.encode(_exData.srcAmount, swapAmount, collToken, borrowToken)); } /// @notice Borrows token, converts to collateral, and adds to position /// @dev Called through the DSProxy /// @param _exData Exchange data /// @param _cAddresses Coll/Debt addresses [cCollAddress, cBorrowAddress] /// @param _gasCost Gas cost for specific transaction function boost( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost ) public payable { enterMarket(_cAddresses[0], _cAddresses[1]); address payable user = payable(getUserAddress()); uint maxBorrow = getMaxBorrow(_cAddresses[1], address(this)); uint borrowAmount = (_exData.srcAmount > maxBorrow) ? maxBorrow : _exData.srcAmount; require(CTokenInterface(_cAddresses[1]).borrow(borrowAmount) == 0); address collToken = getUnderlyingAddr(_cAddresses[0]); address borrowToken = getUnderlyingAddr(_cAddresses[1]); uint swapAmount = 0; if (collToken != borrowToken) { borrowAmount -= getFee(borrowAmount, user, _gasCost, _cAddresses[1]); _exData.srcAmount = borrowAmount; (,swapAmount) = _sell(_exData); } else { swapAmount = borrowAmount; swapAmount -= getGasCost(swapAmount, _gasCost, _cAddresses[1]); } approveCToken(collToken, _cAddresses[0]); if (collToken != ETH_ADDRESS) { require(CTokenInterface(_cAddresses[0]).mint(swapAmount) == 0); } else { CEtherInterface(_cAddresses[0]).mint{value: swapAmount}(); // reverts on fail } // handle 0x fee tx.origin.transfer(address(this).balance); // log amount, collToken, borrowToken logger.Log(address(this), msg.sender, "CompoundBoost", abi.encode(_exData.srcAmount, swapAmount, collToken, borrowToken)); } } contract SaverExchange is SaverExchangeCore, AdminAuth, GasBurner { using SafeERC20 for ERC20; uint256 public constant SERVICE_FEE = 800; // 0.125% Fee // solhint-disable-next-line const-name-snakecase DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); uint public burnAmount = 10; /// @notice Takes a src amount of tokens and converts it into the dest token /// @dev Takes fee from the _srcAmount before the exchange /// @param exData [srcAddr, destAddr, srcAmount, destAmount, minPrice, exchangeType, exchangeAddr, callData, price0x] /// @param _user User address who called the exchange function sell(ExchangeData memory exData, address payable _user) public payable burnGas(burnAmount) { // take fee uint dfsFee = getFee(exData.srcAmount, exData.srcAddr); exData.srcAmount = sub(exData.srcAmount, dfsFee); // Perform the exchange (address wrapper, uint destAmount) = _sell(exData); // send back any leftover ether or tokens sendLeftover(exData.srcAddr, exData.destAddr, _user); // log the event logger.Log(address(this), msg.sender, "ExchangeSell", abi.encode(wrapper, exData.srcAddr, exData.destAddr, exData.srcAmount, destAmount)); } /// @notice Takes a dest amount of tokens and converts it from the src token /// @dev Send always more than needed for the swap, extra will be returned /// @param exData [srcAddr, destAddr, srcAmount, destAmount, minPrice, exchangeType, exchangeAddr, callData, price0x] /// @param _user User address who called the exchange function buy(ExchangeData memory exData, address payable _user) public payable burnGas(burnAmount){ uint dfsFee = getFee(exData.srcAmount, exData.srcAddr); exData.srcAmount = sub(exData.srcAmount, dfsFee); // Perform the exchange (address wrapper, uint srcAmount) = _buy(exData); // send back any leftover ether or tokens sendLeftover(exData.srcAddr, exData.destAddr, _user); // log the event logger.Log(address(this), msg.sender, "ExchangeBuy", abi.encode(wrapper, exData.srcAddr, exData.destAddr, srcAmount, exData.destAmount)); } /// @notice Takes a feePercentage and sends it to wallet /// @param _amount Dai amount of the whole trade /// @param _token Address of the token /// @return feeAmount Amount in Dai owner earned on the fee function getFee(uint256 _amount, address _token) internal returns (uint256 feeAmount) { uint256 fee = SERVICE_FEE; if (Discount(DISCOUNT_ADDRESS).isCustomFeeSet(msg.sender)) { fee = Discount(DISCOUNT_ADDRESS).getCustomServiceFee(msg.sender); } if (fee == 0) { feeAmount = 0; } else { feeAmount = _amount / fee; if (_token == KYBER_ETH_ADDRESS) { WALLET_ID.transfer(feeAmount); } else { ERC20(_token).safeTransfer(WALLET_ID, feeAmount); } } } /// @notice Changes the amount of gas token we burn for each call /// @dev Only callable by the owner /// @param _newBurnAmount New amount of gas tokens to be burned function changeBurnAmount(uint _newBurnAmount) public { require(owner == msg.sender); burnAmount = _newBurnAmount; } } contract MCDSaverFlashLoan is MCDSaverProxy, AdminAuth, FlashLoanReceiverBase { ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public {} struct SaverData { uint cdpId; uint gasCost; uint loanAmount; uint fee; address joinAddr; } function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { //check the contract has the specified balance require(_amount <= getBalanceInternal(address(this), _reserve), "Invalid balance for the contract"); ( bytes memory exDataBytes, uint cdpId, uint gasCost, address joinAddr, bool isRepay ) = abi.decode(_params, (bytes,uint256,uint256,address,bool)); ExchangeData memory exchangeData = unpackExchangeData(exDataBytes); SaverData memory saverData = SaverData({ cdpId: cdpId, gasCost: gasCost, loanAmount: _amount, fee: _fee, joinAddr: joinAddr }); if (isRepay) { repayWithLoan(exchangeData, saverData); } else { boostWithLoan(exchangeData, saverData); } transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } } function boostWithLoan( ExchangeData memory _exchangeData, SaverData memory _saverData ) internal { address user = getOwner(manager, _saverData.cdpId); // Draw users Dai uint maxDebt = getMaxDebt(_saverData.cdpId, manager.ilks(_saverData.cdpId)); uint daiDrawn = drawDai(_saverData.cdpId, manager.ilks(_saverData.cdpId), maxDebt); // Calc. fees uint dsfFee = getFee((daiDrawn + _saverData.loanAmount), _saverData.gasCost, user); uint afterFee = (daiDrawn + _saverData.loanAmount) - dsfFee; // Swap _exchangeData.srcAmount = afterFee; (, uint swapedAmount) = _sell(_exchangeData); // Return collateral addCollateral(_saverData.cdpId, _saverData.joinAddr, swapedAmount); // Draw Dai to repay the flash loan drawDai(_saverData.cdpId, manager.ilks(_saverData.cdpId), (_saverData.loanAmount + _saverData.fee)); logger.Log(address(this), msg.sender, "MCDFlashBoost", abi.encode(_saverData.cdpId, owner, _exchangeData.srcAmount, swapedAmount)); } function repayWithLoan( ExchangeData memory _exchangeData, SaverData memory _saverData ) internal { address user = getOwner(manager, _saverData.cdpId); bytes32 ilk = manager.ilks(_saverData.cdpId); // Draw collateral uint maxColl = getMaxCollateral(_saverData.cdpId, ilk, _saverData.joinAddr); uint collDrawn = drawCollateral(_saverData.cdpId, _saverData.joinAddr, maxColl); // Swap _exchangeData.srcAmount = (_saverData.loanAmount + collDrawn); (, uint swapedAmount) = _sell(_exchangeData); uint paybackAmount = (swapedAmount - getFee(swapedAmount, _saverData.gasCost, user)); paybackAmount = limitLoanAmount(_saverData.cdpId, ilk, paybackAmount, user); // Payback the debt paybackDebt(_saverData.cdpId, ilk, paybackAmount, user); // Draw collateral to repay the flash loan drawCollateral(_saverData.cdpId, _saverData.joinAddr, (_saverData.loanAmount + _saverData.fee)); logger.Log(address(this), msg.sender, "MCDFlashRepay", abi.encode(_saverData.cdpId, owner, _exchangeData.srcAmount, swapedAmount)); } /// @notice Handles that the amount is not bigger than cdp debt and not dust function limitLoanAmount(uint _cdpId, bytes32 _ilk, uint _paybackAmount, address _owner) internal returns (uint256) { uint debt = getAllDebt(address(vat), manager.urns(_cdpId), manager.urns(_cdpId), _ilk); if (_paybackAmount > debt) { ERC20(DAI_ADDRESS).transfer(_owner, (_paybackAmount - debt)); return debt; } uint debtLeft = debt - _paybackAmount; (,,,, uint dust) = vat.ilks(_ilk); dust = dust / 10**27; // Less than dust value if (debtLeft < dust) { uint amountOverDust = (dust - debtLeft); ERC20(DAI_ADDRESS).transfer(_owner, amountOverDust); return (_paybackAmount - amountOverDust); } return _paybackAmount; } receive() external override(FlashLoanReceiverBase, SaverExchangeCore) payable {} } contract CompoundFlashLoanTaker is CompoundSaverProxy, ProxyPermission, GasBurner { ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); address payable public constant COMPOUND_SAVER_FLASH_LOAN = 0xCeB190A35D9D4804b9CE8d0CF79239f6949BfCcB; /// @notice Repays the position with it's own fund or with FL if needed /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress, exchangeAddress] /// @param _gasCost Gas cost for specific transaction function repayWithLoan( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost ) public payable burnGas(25) { uint maxColl = getMaxCollateral(_cAddresses[0], address(this)); if (_exData.srcAmount <= maxColl) { repay(_exData, _cAddresses, _gasCost); } else { // 0x fee COMPOUND_SAVER_FLASH_LOAN.transfer(msg.value); uint loanAmount = (_exData.srcAmount - maxColl); bytes memory encoded = packExchangeData(_exData); bytes memory paramsData = abi.encode(encoded, _cAddresses, _gasCost, true, address(this)); givePermission(COMPOUND_SAVER_FLASH_LOAN); lendingPool.flashLoan(COMPOUND_SAVER_FLASH_LOAN, getUnderlyingAddr(_cAddresses[0]), loanAmount, paramsData); removePermission(COMPOUND_SAVER_FLASH_LOAN); logger.Log(address(this), msg.sender, "CompoundFlashRepay", abi.encode(loanAmount, _exData.srcAmount, _cAddresses[0])); } } /// @notice Boosts the position with it's own fund or with FL if needed /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress, exchangeAddress] /// @param _gasCost Gas cost for specific transaction function boostWithLoan( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost ) public payable burnGas(20) { uint maxBorrow = getMaxBorrow(_cAddresses[1], address(this)); if (_exData.srcAmount <= maxBorrow) { boost(_exData, _cAddresses, _gasCost); } else { // 0x fee COMPOUND_SAVER_FLASH_LOAN.transfer(msg.value); uint loanAmount = (_exData.srcAmount - maxBorrow); bytes memory paramsData = abi.encode(packExchangeData(_exData), _cAddresses, _gasCost, false, address(this)); givePermission(COMPOUND_SAVER_FLASH_LOAN); lendingPool.flashLoan(COMPOUND_SAVER_FLASH_LOAN, getUnderlyingAddr(_cAddresses[1]), loanAmount, paramsData); removePermission(COMPOUND_SAVER_FLASH_LOAN); logger.Log(address(this), msg.sender, "CompoundFlashBoost", abi.encode(loanAmount, _exData.srcAmount, _cAddresses[1])); } } }

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{"success": true, "error": null, "results": {"detectors": [{"check": "tx-origin", "impact": "Medium", "confidence": "Medium"}, {"check": "name-reused", "impact": "High", "confidence": "High"}, {"check": "erc20-interface", "impact": "Medium", "confidence": "High"}, {"check": "arbitrary-send", "impact": "High", "confidence": "Medium"}, {"check": "unchecked-lowlevel", "impact": "Medium", "confidence": "Medium"}, {"check": "incorrect-equality", "impact": "Medium", "confidence": "High"}, {"check": "uninitialized-local", "impact": "Medium", "confidence": "Medium"}, {"check": "unchecked-transfer", "impact": "High", "confidence": "Medium"}, {"check": "unused-return", "impact": "Medium", "confidence": "Medium"}, {"check": "locked-ether", "impact": "Medium", "confidence": "High"}]}}

0x8C4F1bC9BAf4B507c8Eb88dc68E67922c6F4aE59

pragma solidity 0.6.6; pragma experimental ABIEncoderV2; contract DSAuthEvents { event LogSetAuthority(address indexed authority); event LogSetOwner(address indexed owner); } contract DSAuth is DSAuthEvents { DSAuthority public authority; address public owner; constructor() public { owner = msg.sender; emit LogSetOwner(msg.sender); } function setOwner(address owner_) public auth { owner = owner_; emit LogSetOwner(owner); } function setAuthority(DSAuthority authority_) public auth { authority = authority_; emit LogSetAuthority(address(authority)); } modifier auth { require(isAuthorized(msg.sender, msg.sig)); _; } function isAuthorized(address src, bytes4 sig) internal view returns (bool) { if (src == address(this)) { return true; } else if (src == owner) { return true; } else if (authority == DSAuthority(0)) { return false; } else { return authority.canCall(src, address(this), sig); } } } abstract contract DSAuthority { function canCall(address src, address dst, bytes4 sig) public virtual view returns (bool); } abstract contract DSGuard { function canCall(address src_, address dst_, bytes4 sig) public view virtual returns (bool); function permit(bytes32 src, bytes32 dst, bytes32 sig) public virtual; function forbid(bytes32 src, bytes32 dst, bytes32 sig) public virtual; function permit(address src, address dst, bytes32 sig) public virtual; function forbid(address src, address dst, bytes32 sig) public virtual; } abstract contract DSGuardFactory { function newGuard() public virtual returns (DSGuard guard); } contract DSMath { function add(uint256 x, uint256 y) internal pure returns (uint256 z) { require((z = x + y) >= x); } function sub(uint256 x, uint256 y) internal pure returns (uint256 z) { require((z = x - y) <= x); } function mul(uint256 x, uint256 y) internal pure returns (uint256 z) { require(y == 0 || (z = x * y) / y == x); } function div(uint256 x, uint256 y) internal pure returns (uint256 z) { return x / y; } function min(uint256 x, uint256 y) internal pure returns (uint256 z) { return x <= y ? x : y; } function max(uint256 x, uint256 y) internal pure returns (uint256 z) { return x >= y ? x : y; } function imin(int256 x, int256 y) internal pure returns (int256 z) { return x <= y ? x : y; } function imax(int256 x, int256 y) internal pure returns (int256 z) { return x >= y ? x : y; } uint256 constant WAD = 10**18; uint256 constant RAY = 10**27; function wmul(uint256 x, uint256 y) internal pure returns (uint256 z) { z = add(mul(x, y), WAD / 2) / WAD; } function rmul(uint256 x, uint256 y) internal pure returns (uint256 z) { z = add(mul(x, y), RAY / 2) / RAY; } function wdiv(uint256 x, uint256 y) internal pure returns (uint256 z) { z = add(mul(x, WAD), y / 2) / y; } function rdiv(uint256 x, uint256 y) internal pure returns (uint256 z) { z = add(mul(x, RAY), y / 2) / y; } // This famous algorithm is called "exponentiation by squaring" // and calculates x^n with x as fixed-point and n as regular unsigned. // // It's O(log n), instead of O(n) for naive repeated multiplication. // // These facts are why it works: // // If n is even, then x^n = (x^2)^(n/2). // If n is odd, then x^n = x * x^(n-1), // and applying the equation for even x gives // x^n = x * (x^2)^((n-1) / 2). // // Also, EVM division is flooring and // floor[(n-1) / 2] = floor[n / 2]. // function rpow(uint256 x, uint256 n) internal pure returns (uint256 z) { z = n % 2 != 0 ? x : RAY; for (n /= 2; n != 0; n /= 2) { x = rmul(x, x); if (n % 2 != 0) { z = rmul(z, x); } } } } contract DSNote { event LogNote( bytes4 indexed sig, address indexed guy, bytes32 indexed foo, bytes32 indexed bar, uint256 wad, bytes fax ) anonymous; modifier note { bytes32 foo; bytes32 bar; assembly { foo := calldataload(4) bar := calldataload(36) } emit LogNote(msg.sig, msg.sender, foo, bar, msg.value, msg.data); _; } } abstract contract DSProxy is DSAuth, DSNote { DSProxyCache public cache; // global cache for contracts constructor(address _cacheAddr) public { require(setCache(_cacheAddr)); } // solhint-disable-next-line no-empty-blocks receive() external payable {} // use the proxy to execute calldata _data on contract _code // function execute(bytes memory _code, bytes memory _data) // public // payable // virtual // returns (address target, bytes32 response); function execute(address _target, bytes memory _data) public payable virtual returns (bytes32 response); //set new cache function setCache(address _cacheAddr) public virtual payable returns (bool); } contract DSProxyCache { mapping(bytes32 => address) cache; function read(bytes memory _code) public view returns (address) { bytes32 hash = keccak256(_code); return cache[hash]; } function write(bytes memory _code) public returns (address target) { assembly { target := create(0, add(_code, 0x20), mload(_code)) switch iszero(extcodesize(target)) case 1 { // throw if contract failed to deploy revert(0, 0) } } bytes32 hash = keccak256(_code); cache[hash] = target; } } abstract contract DSProxyFactoryInterface { function build(address owner) public virtual returns (DSProxy proxy); } contract Migrations { address public owner; uint public last_completed_migration; modifier restricted() { if (msg.sender == owner) _; } constructor() public { owner = msg.sender; } function setCompleted(uint completed) public restricted { last_completed_migration = completed; } function upgrade(address new_address) public restricted { Migrations upgraded = Migrations(new_address); upgraded.setCompleted(last_completed_migration); } } contract AaveHelper is DSMath { using SafeERC20 for ERC20; address payable public constant WALLET_ADDR = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; address public constant DISCOUNT_ADDR = 0x1b14E8D511c9A4395425314f849bD737BAF8208F; uint public constant MANUAL_SERVICE_FEE = 400; // 0.25% Fee uint public constant AUTOMATIC_SERVICE_FEE = 333; // 0.3% Fee address public constant BOT_REGISTRY_ADDRESS = 0x637726f8b08a7ABE3aE3aCaB01A80E2d8ddeF77B; address public constant ETH_ADDR = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant AAVE_LENDING_POOL_ADDRESSES = 0x24a42fD28C976A61Df5D00D0599C34c4f90748c8; uint public constant NINETY_NINE_PERCENT_WEI = 999900000000000000; uint16 public constant AAVE_REFERRAL_CODE = 64; /// @param _collateralAddress underlying token address /// @param _user users address function getMaxCollateral(address _collateralAddress, address _user) public view returns (uint256) { address lendingPoolAddressDataProvider = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolDataProvider(); address lendingPoolCoreAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); uint256 pow10 = 10 ** (18 - _getDecimals(_collateralAddress)); // fetch all needed data (,uint256 totalCollateralETH, uint256 totalBorrowsETH,,uint256 currentLTV,,,) = ILendingPool(lendingPoolAddressDataProvider).calculateUserGlobalData(_user); (,uint256 tokenLTV,,) = ILendingPool(lendingPoolCoreAddress).getReserveConfiguration(_collateralAddress); uint256 collateralPrice = IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_collateralAddress); uint256 userTokenBalance = ILendingPool(lendingPoolCoreAddress).getUserUnderlyingAssetBalance(_collateralAddress, _user); uint256 userTokenBalanceEth = wmul(userTokenBalance * pow10, collateralPrice); // if borrow is 0, return whole user balance if (totalBorrowsETH == 0) { return userTokenBalance; } uint256 maxCollateralEth = div(sub(mul(currentLTV, totalCollateralETH), mul(totalBorrowsETH, 100)), currentLTV); /// @dev final amount can't be higher than users token balance maxCollateralEth = maxCollateralEth > userTokenBalanceEth ? userTokenBalanceEth : maxCollateralEth; // might happen due to wmul precision if (maxCollateralEth >= totalCollateralETH) { return wdiv(totalCollateralETH, collateralPrice) / pow10; } // get sum of all other reserves multiplied with their liquidation thresholds by reversing formula uint256 a = sub(wmul(currentLTV, totalCollateralETH), wmul(tokenLTV, userTokenBalanceEth)); // add new collateral amount multiplied by its threshold, and then divide with new total collateral uint256 newLiquidationThreshold = wdiv(add(a, wmul(sub(userTokenBalanceEth, maxCollateralEth), tokenLTV)), sub(totalCollateralETH, maxCollateralEth)); // if new threshold is lower than first one, calculate new max collateral with newLiquidationThreshold if (newLiquidationThreshold < currentLTV) { maxCollateralEth = div(sub(mul(newLiquidationThreshold, totalCollateralETH), mul(totalBorrowsETH, 100)), newLiquidationThreshold); maxCollateralEth = maxCollateralEth > userTokenBalanceEth ? userTokenBalanceEth : maxCollateralEth; } return wmul(wdiv(maxCollateralEth, collateralPrice) / pow10, NINETY_NINE_PERCENT_WEI); } /// @param _borrowAddress underlying token address /// @param _user users address function getMaxBorrow(address _borrowAddress, address _user) public view returns (uint256) { address lendingPoolAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); (,,,,uint256 availableBorrowsETH,,,) = ILendingPool(lendingPoolAddress).getUserAccountData(_user); uint256 borrowPrice = IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_borrowAddress); return wmul(wdiv(availableBorrowsETH, borrowPrice) / (10 ** (18 - _getDecimals(_borrowAddress))), NINETY_NINE_PERCENT_WEI); } /// @notice Calculates the fee amount /// @param _amount Amount that is converted /// @param _user Actuall user addr not DSProxy /// @param _gasCost Ether amount of gas we are spending for tx /// @param _tokenAddr token addr. of token we are getting for the fee /// @return feeAmount The amount we took for the fee function getFee(uint _amount, address _user, uint _gasCost, address _tokenAddr) internal returns (uint feeAmount) { address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); uint fee = MANUAL_SERVICE_FEE; if (BotRegistry(BOT_REGISTRY_ADDRESS).botList(tx.origin)) { fee = AUTOMATIC_SERVICE_FEE; } if (Discount(DISCOUNT_ADDR).isCustomFeeSet(_user)) { fee = Discount(DISCOUNT_ADDR).getCustomServiceFee(_user); } feeAmount = (fee == 0) ? 0 : (_amount / fee); if (_gasCost != 0) { uint256 price = IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_tokenAddr); _gasCost = wmul(_gasCost, price) / (10 ** (18 - _getDecimals(_tokenAddr))); feeAmount = add(feeAmount, _gasCost); } // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } if (_tokenAddr == ETH_ADDR) { WALLET_ADDR.transfer(feeAmount); } else { ERC20(_tokenAddr).safeTransfer(WALLET_ADDR, feeAmount); } } /// @notice Calculates the gas cost for transaction /// @param _amount Amount that is converted /// @param _user Actuall user addr not DSProxy /// @param _gasCost Ether amount of gas we are spending for tx /// @param _tokenAddr token addr. of token we are getting for the fee /// @return gasCost The amount we took for the gas cost function getGasCost(uint _amount, address _user, uint _gasCost, address _tokenAddr) internal returns (uint gasCost) { address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); if (_gasCost != 0) { uint256 price = IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_tokenAddr); _gasCost = wmul(_gasCost, price); gasCost = _gasCost; } // fee can't go over 20% of the whole amount if (gasCost > (_amount / 5)) { gasCost = _amount / 5; } if (_tokenAddr == ETH_ADDR) { WALLET_ADDR.transfer(gasCost); } else { ERC20(_tokenAddr).safeTransfer(WALLET_ADDR, gasCost); } } /// @notice Returns the owner of the DSProxy that called the contract function getUserAddress() internal view returns (address) { DSProxy proxy = DSProxy(payable(address(this))); return proxy.owner(); } /// @notice Approves token contract to pull underlying tokens from the DSProxy /// @param _tokenAddr Token we are trying to approve /// @param _caller Address which will gain the approval function approveToken(address _tokenAddr, address _caller) internal { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeApprove(_caller, uint256(-1)); } } /// @notice Send specific amount from contract to specific user /// @param _token Token we are trying to send /// @param _user User that should receive funds /// @param _amount Amount that should be sent function sendContractBalance(address _token, address _user, uint _amount) public { if (_amount == 0) return; if (_token == ETH_ADDR) { payable(_user).transfer(_amount); } else { ERC20(_token).safeTransfer(_user, _amount); } } function sendFullContractBalance(address _token, address _user) public { if (_token == ETH_ADDR) { sendContractBalance(_token, _user, address(this).balance); } else { sendContractBalance(_token, _user, ERC20(_token).balanceOf(address(this))); } } function _getDecimals(address _token) internal view returns (uint256) { if (_token == ETH_ADDR) return 18; return ERC20(_token).decimals(); } } contract AaveSafetyRatio is AaveHelper { function getSafetyRatio(address _user) public view returns(uint256) { address lendingPoolAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); (,,uint256 totalBorrowsETH,,uint256 availableBorrowsETH,,,) = ILendingPool(lendingPoolAddress).getUserAccountData(_user); return wdiv(add(totalBorrowsETH, availableBorrowsETH), totalBorrowsETH); } } contract AdminAuth { using SafeERC20 for ERC20; address public owner; address public admin; modifier onlyOwner() { require(owner == msg.sender); _; } constructor() public { owner = msg.sender; } /// @notice Admin is set by owner first time, after that admin is super role and has permission to change owner /// @param _admin Address of multisig that becomes admin function setAdminByOwner(address _admin) public { require(msg.sender == owner); require(admin == address(0)); admin = _admin; } /// @notice Admin is able to set new admin /// @param _admin Address of multisig that becomes new admin function setAdminByAdmin(address _admin) public { require(msg.sender == admin); admin = _admin; } /// @notice Admin is able to change owner /// @param _owner Address of new owner function setOwnerByAdmin(address _owner) public { require(msg.sender == admin); owner = _owner; } /// @notice Destroy the contract function kill() public onlyOwner { selfdestruct(payable(owner)); } /// @notice withdraw stuck funds function withdrawStuckFunds(address _token, uint _amount) public onlyOwner { if (_token == 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE) { payable(owner).transfer(_amount); } else { ERC20(_token).safeTransfer(owner, _amount); } } } contract Auth is AdminAuth { bool public ALL_AUTHORIZED = false; mapping(address => bool) public authorized; modifier onlyAuthorized() { require(ALL_AUTHORIZED || authorized[msg.sender]); _; } constructor() public { authorized[msg.sender] = true; } function setAuthorized(address _user, bool _approved) public onlyOwner { authorized[_user] = _approved; } function setAllAuthorized(bool _authorized) public onlyOwner { ALL_AUTHORIZED = _authorized; } } contract ProxyPermission { address public constant FACTORY_ADDRESS = 0x5a15566417e6C1c9546523066500bDDBc53F88C7; /// @notice Called in the context of DSProxy to authorize an address /// @param _contractAddr Address which will be authorized function givePermission(address _contractAddr) public { address currAuthority = address(DSAuth(address(this)).authority()); DSGuard guard = DSGuard(currAuthority); if (currAuthority == address(0)) { guard = DSGuardFactory(FACTORY_ADDRESS).newGuard(); DSAuth(address(this)).setAuthority(DSAuthority(address(guard))); } guard.permit(_contractAddr, address(this), bytes4(keccak256("execute(address,bytes)"))); } /// @notice Called in the context of DSProxy to remove authority of an address /// @param _contractAddr Auth address which will be removed from authority list function removePermission(address _contractAddr) public { address currAuthority = address(DSAuth(address(this)).authority()); // if there is no authority, that means that contract doesn't have permission if (currAuthority == address(0)) { return; } DSGuard guard = DSGuard(currAuthority); guard.forbid(_contractAddr, address(this), bytes4(keccak256("execute(address,bytes)"))); } } contract CompoundMonitorProxy is AdminAuth { using SafeERC20 for ERC20; uint public CHANGE_PERIOD; address public monitor; address public newMonitor; address public lastMonitor; uint public changeRequestedTimestamp; mapping(address => bool) public allowed; event MonitorChangeInitiated(address oldMonitor, address newMonitor); event MonitorChangeCanceled(); event MonitorChangeFinished(address monitor); event MonitorChangeReverted(address monitor); // if someone who is allowed become malicious, owner can't be changed modifier onlyAllowed() { require(allowed[msg.sender] || msg.sender == owner); _; } modifier onlyMonitor() { require (msg.sender == monitor); _; } constructor(uint _changePeriod) public { CHANGE_PERIOD = _changePeriod * 1 days; } /// @notice Only monitor contract is able to call execute on users proxy /// @param _owner Address of cdp owner (users DSProxy address) /// @param _compoundSaverProxy Address of CompoundSaverProxy /// @param _data Data to send to CompoundSaverProxy function callExecute(address _owner, address _compoundSaverProxy, bytes memory _data) public payable onlyMonitor { // execute reverts if calling specific method fails DSProxyInterface(_owner).execute{value: msg.value}(_compoundSaverProxy, _data); // return if anything left if (address(this).balance > 0) { msg.sender.transfer(address(this).balance); } } /// @notice Allowed users are able to set Monitor contract without any waiting period first time /// @param _monitor Address of Monitor contract function setMonitor(address _monitor) public onlyAllowed { require(monitor == address(0)); monitor = _monitor; } /// @notice Allowed users are able to start procedure for changing monitor /// @dev after CHANGE_PERIOD needs to call confirmNewMonitor to actually make a change /// @param _newMonitor address of new monitor function changeMonitor(address _newMonitor) public onlyAllowed { require(changeRequestedTimestamp == 0); changeRequestedTimestamp = now; lastMonitor = monitor; newMonitor = _newMonitor; emit MonitorChangeInitiated(lastMonitor, newMonitor); } /// @notice At any point allowed users are able to cancel monitor change function cancelMonitorChange() public onlyAllowed { require(changeRequestedTimestamp > 0); changeRequestedTimestamp = 0; newMonitor = address(0); emit MonitorChangeCanceled(); } /// @notice Anyone is able to confirm new monitor after CHANGE_PERIOD if process is started function confirmNewMonitor() public onlyAllowed { require((changeRequestedTimestamp + CHANGE_PERIOD) < now); require(changeRequestedTimestamp != 0); require(newMonitor != address(0)); monitor = newMonitor; newMonitor = address(0); changeRequestedTimestamp = 0; emit MonitorChangeFinished(monitor); } /// @notice Its possible to revert monitor to last used monitor function revertMonitor() public onlyAllowed { require(lastMonitor != address(0)); monitor = lastMonitor; emit MonitorChangeReverted(monitor); } /// @notice Allowed users are able to add new allowed user /// @param _user Address of user that will be allowed function addAllowed(address _user) public onlyAllowed { allowed[_user] = true; } /// @notice Allowed users are able to remove allowed user /// @dev owner is always allowed even if someone tries to remove it from allowed mapping /// @param _user Address of allowed user function removeAllowed(address _user) public onlyAllowed { allowed[_user] = false; } function setChangePeriod(uint _periodInDays) public onlyAllowed { require(_periodInDays * 1 days > CHANGE_PERIOD); CHANGE_PERIOD = _periodInDays * 1 days; } /// @notice In case something is left in contract, owner is able to withdraw it /// @param _token address of token to withdraw balance function withdrawToken(address _token) public onlyOwner { uint balance = ERC20(_token).balanceOf(address(this)); ERC20(_token).safeTransfer(msg.sender, balance); } /// @notice In case something is left in contract, owner is able to withdraw it function withdrawEth() public onlyOwner { uint balance = address(this).balance; msg.sender.transfer(balance); } } contract CompoundSubscriptions is AdminAuth { struct CompoundHolder { address user; uint128 minRatio; uint128 maxRatio; uint128 optimalRatioBoost; uint128 optimalRatioRepay; bool boostEnabled; } struct SubPosition { uint arrPos; bool subscribed; } CompoundHolder[] public subscribers; mapping (address => SubPosition) public subscribersPos; uint public changeIndex; event Subscribed(address indexed user); event Unsubscribed(address indexed user); event Updated(address indexed user); event ParamUpdates(address indexed user, uint128, uint128, uint128, uint128, bool); /// @dev Called by the DSProxy contract which owns the Compound position /// @notice Adds the users Compound poistion in the list of subscriptions so it can be monitored /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalBoost Ratio amount which boost should target /// @param _optimalRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled function subscribe(uint128 _minRatio, uint128 _maxRatio, uint128 _optimalBoost, uint128 _optimalRepay, bool _boostEnabled) external { // if boost is not enabled, set max ratio to max uint uint128 localMaxRatio = _boostEnabled ? _maxRatio : uint128(-1); require(checkParams(_minRatio, localMaxRatio), "Must be correct params"); SubPosition storage subInfo = subscribersPos[msg.sender]; CompoundHolder memory subscription = CompoundHolder({ minRatio: _minRatio, maxRatio: localMaxRatio, optimalRatioBoost: _optimalBoost, optimalRatioRepay: _optimalRepay, user: msg.sender, boostEnabled: _boostEnabled }); changeIndex++; if (subInfo.subscribed) { subscribers[subInfo.arrPos] = subscription; emit Updated(msg.sender); emit ParamUpdates(msg.sender, _minRatio, localMaxRatio, _optimalBoost, _optimalRepay, _boostEnabled); } else { subscribers.push(subscription); subInfo.arrPos = subscribers.length - 1; subInfo.subscribed = true; emit Subscribed(msg.sender); } } /// @notice Called by the users DSProxy /// @dev Owner who subscribed cancels his subscription function unsubscribe() external { _unsubscribe(msg.sender); } /// @dev Checks limit if minRatio is bigger than max /// @param _minRatio Minimum ratio, bellow which repay can be triggered /// @param _maxRatio Maximum ratio, over which boost can be triggered /// @return Returns bool if the params are correct function checkParams(uint128 _minRatio, uint128 _maxRatio) internal pure returns (bool) { if (_minRatio > _maxRatio) { return false; } return true; } /// @dev Internal method to remove a subscriber from the list /// @param _user The actual address that owns the Compound position function _unsubscribe(address _user) internal { require(subscribers.length > 0, "Must have subscribers in the list"); SubPosition storage subInfo = subscribersPos[_user]; require(subInfo.subscribed, "Must first be subscribed"); address lastOwner = subscribers[subscribers.length - 1].user; SubPosition storage subInfo2 = subscribersPos[lastOwner]; subInfo2.arrPos = subInfo.arrPos; subscribers[subInfo.arrPos] = subscribers[subscribers.length - 1]; subscribers.pop(); // remove last element and reduce arr length changeIndex++; subInfo.subscribed = false; subInfo.arrPos = 0; emit Unsubscribed(msg.sender); } /// @dev Checks if the user is subscribed /// @param _user The actual address that owns the Compound position /// @return If the user is subscribed function isSubscribed(address _user) public view returns (bool) { SubPosition storage subInfo = subscribersPos[_user]; return subInfo.subscribed; } /// @dev Returns subscribtion information about a user /// @param _user The actual address that owns the Compound position /// @return Subscription information about the user if exists function getHolder(address _user) public view returns (CompoundHolder memory) { SubPosition storage subInfo = subscribersPos[_user]; return subscribers[subInfo.arrPos]; } /// @notice Helper method to return all the subscribed CDPs /// @return List of all subscribers function getSubscribers() public view returns (CompoundHolder[] memory) { return subscribers; } /// @notice Helper method for the frontend, returns all the subscribed CDPs paginated /// @param _page What page of subscribers you want /// @param _perPage Number of entries per page /// @return List of all subscribers for that page function getSubscribersByPage(uint _page, uint _perPage) public view returns (CompoundHolder[] memory) { CompoundHolder[] memory holders = new CompoundHolder[](_perPage); uint start = _page * _perPage; uint end = start + _perPage; end = (end > holders.length) ? holders.length : end; uint count = 0; for (uint i = start; i < end; i++) { holders[count] = subscribers[i]; count++; } return holders; } ////////////// ADMIN METHODS /////////////////// /// @notice Admin function to unsubscribe a CDP /// @param _user The actual address that owns the Compound position function unsubscribeByAdmin(address _user) public onlyOwner { SubPosition storage subInfo = subscribersPos[_user]; if (subInfo.subscribed) { _unsubscribe(_user); } } } contract CompoundSubscriptionsProxy is ProxyPermission { address public constant COMPOUND_SUBSCRIPTION_ADDRESS = 0x52015EFFD577E08f498a0CCc11905925D58D6207; address public constant COMPOUND_MONITOR_PROXY = 0xB1cF8DE8e791E4Ed1Bd86c03E2fc1f14389Cb10a; /// @notice Calls subscription contract and creates a DSGuard if non existent /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalRatioBoost Ratio amount which boost should target /// @param _optimalRatioRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled function subscribe( uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled ) public { givePermission(COMPOUND_MONITOR_PROXY); ICompoundSubscription(COMPOUND_SUBSCRIPTION_ADDRESS).subscribe( _minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled); } /// @notice Calls subscription contract and updated existing parameters /// @dev If subscription is non existent this will create one /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalRatioBoost Ratio amount which boost should target /// @param _optimalRatioRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled function update( uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled ) public { ICompoundSubscription(COMPOUND_SUBSCRIPTION_ADDRESS).subscribe(_minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled); } /// @notice Calls the subscription contract to unsubscribe the caller function unsubscribe() public { removePermission(COMPOUND_MONITOR_PROXY); ICompoundSubscription(COMPOUND_SUBSCRIPTION_ADDRESS).unsubscribe(); } } contract CompoundCreateTaker is ProxyPermission { using SafeERC20 for ERC20; address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); // solhint-disable-next-line const-name-snakecase DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); struct CreateInfo { address cCollAddress; address cBorrowAddress; uint depositAmount; } /// @notice Main function which will take a FL and open a leverage position /// @dev Call through DSProxy, if _exchangeData.destAddr is a token approve DSProxy /// @param _createInfo [cCollAddress, cBorrowAddress, depositAmount] /// @param _exchangeData Exchange data struct function openLeveragedLoan( CreateInfo memory _createInfo, SaverExchangeCore.ExchangeData memory _exchangeData, address payable _compReceiver ) public payable { uint loanAmount = _exchangeData.srcAmount; // Pull tokens from user if (_exchangeData.destAddr != ETH_ADDRESS) { ERC20(_exchangeData.destAddr).safeTransferFrom(msg.sender, address(this), _createInfo.depositAmount); } else { require(msg.value >= _createInfo.depositAmount, "Must send correct amount of eth"); } // Send tokens to FL receiver sendDeposit(_compReceiver, _exchangeData.destAddr); // Pack the struct data (uint[4] memory numData, address[6] memory cAddresses, bytes memory callData) = _packData(_createInfo, _exchangeData); bytes memory paramsData = abi.encode(numData, cAddresses, callData, address(this)); givePermission(_compReceiver); lendingPool.flashLoan(_compReceiver, _exchangeData.srcAddr, loanAmount, paramsData); removePermission(_compReceiver); logger.Log(address(this), msg.sender, "CompoundLeveragedLoan", abi.encode(_exchangeData.srcAddr, _exchangeData.destAddr, _exchangeData.srcAmount, _exchangeData.destAmount)); } function sendDeposit(address payable _compoundReceiver, address _token) internal { if (_token != ETH_ADDRESS) { ERC20(_token).safeTransfer(_compoundReceiver, ERC20(_token).balanceOf(address(this))); } _compoundReceiver.transfer(address(this).balance); } function _packData( CreateInfo memory _createInfo, SaverExchangeCore.ExchangeData memory exchangeData ) internal pure returns (uint[4] memory numData, address[6] memory cAddresses, bytes memory callData) { numData = [ exchangeData.srcAmount, exchangeData.destAmount, exchangeData.minPrice, exchangeData.price0x ]; cAddresses = [ _createInfo.cCollAddress, _createInfo.cBorrowAddress, exchangeData.srcAddr, exchangeData.destAddr, exchangeData.exchangeAddr, exchangeData.wrapper ]; callData = exchangeData.callData; } } contract CarefulMath { /** * @dev Possible error codes that we can return */ enum MathError { NO_ERROR, DIVISION_BY_ZERO, INTEGER_OVERFLOW, INTEGER_UNDERFLOW } /** * @dev Multiplies two numbers, returns an error on overflow. */ function mulUInt(uint a, uint b) internal pure returns (MathError, uint) { if (a == 0) { return (MathError.NO_ERROR, 0); } uint c = a * b; if (c / a != b) { return (MathError.INTEGER_OVERFLOW, 0); } else { return (MathError.NO_ERROR, c); } } /** * @dev Integer division of two numbers, truncating the quotient. */ function divUInt(uint a, uint b) internal pure returns (MathError, uint) { if (b == 0) { return (MathError.DIVISION_BY_ZERO, 0); } return (MathError.NO_ERROR, a / b); } /** * @dev Subtracts two numbers, returns an error on overflow (i.e. if subtrahend is greater than minuend). */ function subUInt(uint a, uint b) internal pure returns (MathError, uint) { if (b <= a) { return (MathError.NO_ERROR, a - b); } else { return (MathError.INTEGER_UNDERFLOW, 0); } } /** * @dev Adds two numbers, returns an error on overflow. */ function addUInt(uint a, uint b) internal pure returns (MathError, uint) { uint c = a + b; if (c >= a) { return (MathError.NO_ERROR, c); } else { return (MathError.INTEGER_OVERFLOW, 0); } } /** * @dev add a and b and then subtract c */ function addThenSubUInt(uint a, uint b, uint c) internal pure returns (MathError, uint) { (MathError err0, uint sum) = addUInt(a, b); if (err0 != MathError.NO_ERROR) { return (err0, 0); } return subUInt(sum, c); } } contract Exponential is CarefulMath { uint constant expScale = 1e18; uint constant halfExpScale = expScale/2; uint constant mantissaOne = expScale; struct Exp { uint mantissa; } /** * @dev Creates an exponential from numerator and denominator values. * Note: Returns an error if (`num` * 10e18) > MAX_INT, * or if `denom` is zero. */ function getExp(uint num, uint denom) pure internal returns (MathError, Exp memory) { (MathError err0, uint scaledNumerator) = mulUInt(num, expScale); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } (MathError err1, uint rational) = divUInt(scaledNumerator, denom); if (err1 != MathError.NO_ERROR) { return (err1, Exp({mantissa: 0})); } return (MathError.NO_ERROR, Exp({mantissa: rational})); } /** * @dev Adds two exponentials, returning a new exponential. */ function addExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) { (MathError error, uint result) = addUInt(a.mantissa, b.mantissa); return (error, Exp({mantissa: result})); } /** * @dev Subtracts two exponentials, returning a new exponential. */ function subExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) { (MathError error, uint result) = subUInt(a.mantissa, b.mantissa); return (error, Exp({mantissa: result})); } /** * @dev Multiply an Exp by a scalar, returning a new Exp. */ function mulScalar(Exp memory a, uint scalar) pure internal returns (MathError, Exp memory) { (MathError err0, uint scaledMantissa) = mulUInt(a.mantissa, scalar); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } return (MathError.NO_ERROR, Exp({mantissa: scaledMantissa})); } /** * @dev Multiply an Exp by a scalar, then truncate to return an unsigned integer. */ function mulScalarTruncate(Exp memory a, uint scalar) pure internal returns (MathError, uint) { (MathError err, Exp memory product) = mulScalar(a, scalar); if (err != MathError.NO_ERROR) { return (err, 0); } return (MathError.NO_ERROR, truncate(product)); } /** * @dev Multiply an Exp by a scalar, truncate, then add an to an unsigned integer, returning an unsigned integer. */ function mulScalarTruncateAddUInt(Exp memory a, uint scalar, uint addend) pure internal returns (MathError, uint) { (MathError err, Exp memory product) = mulScalar(a, scalar); if (err != MathError.NO_ERROR) { return (err, 0); } return addUInt(truncate(product), addend); } /** * @dev Divide an Exp by a scalar, returning a new Exp. */ function divScalar(Exp memory a, uint scalar) pure internal returns (MathError, Exp memory) { (MathError err0, uint descaledMantissa) = divUInt(a.mantissa, scalar); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } return (MathError.NO_ERROR, Exp({mantissa: descaledMantissa})); } /** * @dev Divide a scalar by an Exp, returning a new Exp. */ function divScalarByExp(uint scalar, Exp memory divisor) pure internal returns (MathError, Exp memory) { /* We are doing this as: getExp(mulUInt(expScale, scalar), divisor.mantissa) How it works: Exp = a / b; Scalar = s; `s / (a / b)` = `b * s / a` and since for an Exp `a = mantissa, b = expScale` */ (MathError err0, uint numerator) = mulUInt(expScale, scalar); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } return getExp(numerator, divisor.mantissa); } /** * @dev Divide a scalar by an Exp, then truncate to return an unsigned integer. */ function divScalarByExpTruncate(uint scalar, Exp memory divisor) pure internal returns (MathError, uint) { (MathError err, Exp memory fraction) = divScalarByExp(scalar, divisor); if (err != MathError.NO_ERROR) { return (err, 0); } return (MathError.NO_ERROR, truncate(fraction)); } /** * @dev Multiplies two exponentials, returning a new exponential. */ function mulExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) { (MathError err0, uint doubleScaledProduct) = mulUInt(a.mantissa, b.mantissa); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } // We add half the scale before dividing so that we get rounding instead of truncation. // See "Listing 6" and text above it at https://accu.org/index.php/journals/1717 // Without this change, a result like 6.6...e-19 will be truncated to 0 instead of being rounded to 1e-18. (MathError err1, uint doubleScaledProductWithHalfScale) = addUInt(halfExpScale, doubleScaledProduct); if (err1 != MathError.NO_ERROR) { return (err1, Exp({mantissa: 0})); } (MathError err2, uint product) = divUInt(doubleScaledProductWithHalfScale, expScale); // The only error `div` can return is MathError.DIVISION_BY_ZERO but we control `expScale` and it is not zero. assert(err2 == MathError.NO_ERROR); return (MathError.NO_ERROR, Exp({mantissa: product})); } /** * @dev Multiplies two exponentials given their mantissas, returning a new exponential. */ function mulExp(uint a, uint b) pure internal returns (MathError, Exp memory) { return mulExp(Exp({mantissa: a}), Exp({mantissa: b})); } /** * @dev Multiplies three exponentials, returning a new exponential. */ function mulExp3(Exp memory a, Exp memory b, Exp memory c) pure internal returns (MathError, Exp memory) { (MathError err, Exp memory ab) = mulExp(a, b); if (err != MathError.NO_ERROR) { return (err, ab); } return mulExp(ab, c); } /** * @dev Divides two exponentials, returning a new exponential. * (a/scale) / (b/scale) = (a/scale) * (scale/b) = a/b, * which we can scale as an Exp by calling getExp(a.mantissa, b.mantissa) */ function divExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) { return getExp(a.mantissa, b.mantissa); } /** * @dev Truncates the given exp to a whole number value. * For example, truncate(Exp{mantissa: 15 * expScale}) = 15 */ function truncate(Exp memory exp) pure internal returns (uint) { // Note: We are not using careful math here as we're performing a division that cannot fail return exp.mantissa / expScale; } /** * @dev Checks if first Exp is less than second Exp. */ function lessThanExp(Exp memory left, Exp memory right) pure internal returns (bool) { return left.mantissa < right.mantissa; } /** * @dev Checks if left Exp <= right Exp. */ function lessThanOrEqualExp(Exp memory left, Exp memory right) pure internal returns (bool) { return left.mantissa <= right.mantissa; } /** * @dev Checks if left Exp > right Exp. */ function greaterThanExp(Exp memory left, Exp memory right) pure internal returns (bool) { return left.mantissa > right.mantissa; } /** * @dev returns true if Exp is exactly zero */ function isZeroExp(Exp memory value) pure internal returns (bool) { return value.mantissa == 0; } } contract CompoundBorrowProxy { using SafeERC20 for ERC20; address public constant ETH_ADDR = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant COMPTROLLER_ADDR = 0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B; function borrow(address _cCollToken, address _cBorrowToken, address _borrowToken, uint _amount) public { address[] memory markets = new address[](2); markets[0] = _cCollToken; markets[1] = _cBorrowToken; ComptrollerInterface(COMPTROLLER_ADDR).enterMarkets(markets); require(CTokenInterface(_cBorrowToken).borrow(_amount) == 0); // withdraw funds to msg.sender if (_borrowToken != ETH_ADDR) { ERC20(_borrowToken).safeTransfer(msg.sender, ERC20(_borrowToken).balanceOf(address(this))); } else { msg.sender.transfer(address(this).balance); } } } contract AllowanceProxy is AdminAuth { using SafeERC20 for ERC20; address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; // TODO: Real saver exchange address SaverExchange saverExchange = SaverExchange(0x235abFAd01eb1BDa28Ef94087FBAA63E18074926); function callSell(SaverExchangeCore.ExchangeData memory exData) public payable { pullAndSendTokens(exData.srcAddr, exData.srcAmount); saverExchange.sell{value: msg.value}(exData, msg.sender); } function callBuy(SaverExchangeCore.ExchangeData memory exData) public payable { pullAndSendTokens(exData.srcAddr, exData.srcAmount); saverExchange.buy{value: msg.value}(exData, msg.sender); } function pullAndSendTokens(address _tokenAddr, uint _amount) internal { if (_tokenAddr == KYBER_ETH_ADDRESS) { require(msg.value >= _amount, "msg.value smaller than amount"); } else { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(saverExchange), _amount); } } function ownerChangeExchange(address payable _newExchange) public onlyOwner { saverExchange = SaverExchange(_newExchange); } } contract Prices is DSMath { address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; enum ActionType { SELL, BUY } /// @notice Returns the best estimated price from 2 exchanges /// @param _amount Amount of source tokens you want to exchange /// @param _srcToken Address of the source token /// @param _destToken Address of the destination token /// @param _type Type of action SELL|BUY /// @param _wrappers Array of wrapper addresses to compare /// @return (address, uint) The address of the best exchange and the exchange price function getBestPrice( uint256 _amount, address _srcToken, address _destToken, ActionType _type, address[] memory _wrappers ) public returns (address, uint256) { uint256[] memory rates = new uint256[](_wrappers.length); for (uint i=0; i<_wrappers.length; i++) { rates[i] = getExpectedRate(_wrappers[i], _srcToken, _destToken, _amount, _type); } if (_type == ActionType.SELL) { return getBiggestRate(_wrappers, rates); } else { return getSmallestRate(_wrappers, rates); } } /// @notice Return the expected rate from the exchange wrapper /// @dev In case of Oasis/Uniswap handles the different precision tokens /// @param _wrapper Address of exchange wrapper /// @param _srcToken From token /// @param _destToken To token /// @param _amount Amount to be exchanged /// @param _type Type of action SELL|BUY function getExpectedRate( address _wrapper, address _srcToken, address _destToken, uint256 _amount, ActionType _type ) public returns (uint256) { bool success; bytes memory result; if (_type == ActionType.SELL) { (success, result) = _wrapper.call(abi.encodeWithSignature( "getSellRate(address,address,uint256)", _srcToken, _destToken, _amount )); } else { (success, result) = _wrapper.call(abi.encodeWithSignature( "getBuyRate(address,address,uint256)", _srcToken, _destToken, _amount )); } if (success) { return sliceUint(result, 0); } return 0; } /// @notice Finds the biggest rate between exchanges, needed for sell rate /// @param _wrappers Array of wrappers to compare /// @param _rates Array of rates to compare function getBiggestRate( address[] memory _wrappers, uint256[] memory _rates ) internal pure returns (address, uint) { uint256 maxIndex = 0; // starting from 0 in case there is only one rate in array for (uint256 i=0; i<_rates.length; i++) { if (_rates[i] > _rates[maxIndex]) { maxIndex = i; } } return (_wrappers[maxIndex], _rates[maxIndex]); } /// @notice Finds the smallest rate between exchanges, needed for buy rate /// @param _wrappers Array of wrappers to compare /// @param _rates Array of rates to compare function getSmallestRate( address[] memory _wrappers, uint256[] memory _rates ) internal pure returns (address, uint) { uint256 minIndex = 0; // starting from 0 in case there is only one rate in array for (uint256 i=0; i<_rates.length; i++) { if ((_rates[i] < _rates[minIndex] && _rates[i] > 0) || _rates[minIndex] == 0) { minIndex = i; } } return (_wrappers[minIndex], _rates[minIndex]); } function getDecimals(address _token) internal view returns (uint256) { if (_token == KYBER_ETH_ADDRESS) return 18; return ERC20(_token).decimals(); } function sliceUint(bytes memory bs, uint256 start) internal pure returns (uint256) { require(bs.length >= start + 32, "slicing out of range"); uint256 x; assembly { x := mload(add(bs, add(0x20, start))) } return x; } } contract SaverExchangeHelper { using SafeERC20 for ERC20; address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant WETH_ADDRESS = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address payable public constant WALLET_ID = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; address public constant DISCOUNT_ADDRESS = 0x1b14E8D511c9A4395425314f849bD737BAF8208F; address public constant SAVER_EXCHANGE_REGISTRY = 0x25dd3F51e0C3c3Ff164DDC02A8E4D65Bb9cBB12D; address public constant ERC20_PROXY_0X = 0x95E6F48254609A6ee006F7D493c8e5fB97094ceF; address public constant ZRX_ALLOWLIST_ADDR = 0x4BA1f38427b33B8ab7Bb0490200dAE1F1C36823F; function getDecimals(address _token) internal view returns (uint256) { if (_token == KYBER_ETH_ADDRESS) return 18; return ERC20(_token).decimals(); } function getBalance(address _tokenAddr) internal view returns (uint balance) { if (_tokenAddr == KYBER_ETH_ADDRESS) { balance = address(this).balance; } else { balance = ERC20(_tokenAddr).balanceOf(address(this)); } } function approve0xProxy(address _tokenAddr, uint _amount) internal { if (_tokenAddr != KYBER_ETH_ADDRESS) { ERC20(_tokenAddr).safeApprove(address(ERC20_PROXY_0X), _amount); } } function sendLeftover(address _srcAddr, address _destAddr, address payable _to) internal { // send back any leftover ether or tokens if (address(this).balance > 0) { _to.transfer(address(this).balance); } if (getBalance(_srcAddr) > 0) { ERC20(_srcAddr).safeTransfer(_to, getBalance(_srcAddr)); } if (getBalance(_destAddr) > 0) { ERC20(_destAddr).safeTransfer(_to, getBalance(_destAddr)); } } function sliceUint(bytes memory bs, uint256 start) internal pure returns (uint256) { require(bs.length >= start + 32, "slicing out of range"); uint256 x; assembly { x := mload(add(bs, add(0x20, start))) } return x; } } contract SaverExchangeRegistry is AdminAuth { mapping(address => bool) private wrappers; constructor() public { wrappers[0x880A845A85F843a5c67DB2061623c6Fc3bB4c511] = true; wrappers[0x4c9B55f2083629A1F7aDa257ae984E03096eCD25] = true; wrappers[0x42A9237b872368E1bec4Ca8D26A928D7d39d338C] = true; } function addWrapper(address _wrapper) public onlyOwner { wrappers[_wrapper] = true; } function removeWrapper(address _wrapper) public onlyOwner { wrappers[_wrapper] = false; } function isWrapper(address _wrapper) public view returns(bool) { return wrappers[_wrapper]; } } abstract contract CEtherInterface { function mint() external virtual payable; function repayBorrow() external virtual payable; } abstract contract Cat { struct Ilk { address flip; // Liquidator uint256 chop; // Liquidation Penalty [ray] uint256 lump; // Liquidation Quantity [wad] } mapping (bytes32 => Ilk) public ilks; } abstract contract CompoundOracleInterface { function getUnderlyingPrice(address cToken) external view virtual returns (uint); } abstract contract ComptrollerInterface { function enterMarkets(address[] calldata cTokens) external virtual returns (uint256[] memory); function exitMarket(address cToken) external virtual returns (uint256); function getAssetsIn(address account) external virtual view returns (address[] memory); function markets(address account) public virtual view returns (bool, uint256); function getAccountLiquidity(address account) external virtual view returns (uint256, uint256, uint256); function claimComp(address holder) virtual public; function oracle() public virtual view returns (address); } abstract contract DSProxyInterface { /// Truffle wont compile if this isn't commented // function execute(bytes memory _code, bytes memory _data) // public virtual // payable // returns (address, bytes32); function execute(address _target, bytes memory _data) public virtual payable returns (bytes32); function setCache(address _cacheAddr) public virtual payable returns (bool); function owner() public virtual returns (address); } abstract contract GemLike { function approve(address, uint) public virtual; function transfer(address, uint) public virtual; function transferFrom(address, address, uint) public virtual; function deposit() public virtual payable; function withdraw(uint) public virtual; } abstract contract ManagerLike { function cdpCan(address, uint, address) public virtual view returns (uint); function ilks(uint) public virtual view returns (bytes32); function owns(uint) public virtual view returns (address); function urns(uint) public virtual view returns (address); function vat() public virtual view returns (address); function open(bytes32) public virtual returns (uint); function give(uint, address) public virtual; function cdpAllow(uint, address, uint) public virtual; function urnAllow(address, uint) public virtual; function frob(uint, int, int) public virtual; function frob(uint, address, int, int) public virtual; function flux(uint, address, uint) public virtual; function move(uint, address, uint) public virtual; function exit(address, uint, address, uint) public virtual; function quit(uint, address) public virtual; function enter(address, uint) public virtual; function shift(uint, uint) public virtual; } abstract contract VatLike { function can(address, address) public virtual view returns (uint); function ilks(bytes32) public virtual view returns (uint, uint, uint, uint, uint); function dai(address) public virtual view returns (uint); function urns(bytes32, address) public virtual view returns (uint, uint); function frob(bytes32, address, address, address, int, int) public virtual; function hope(address) public virtual; function move(address, address, uint) public virtual; } abstract contract GemJoinLike { function dec() public virtual returns (uint); function gem() public virtual returns (GemLike); function join(address, uint) public virtual payable; function exit(address, uint) public virtual; } abstract contract GNTJoinLike { function bags(address) public virtual view returns (address); function make(address) public virtual returns (address); } abstract contract DaiJoinLike { function vat() public virtual returns (VatLike); function dai() public virtual returns (GemLike); function join(address, uint) public virtual payable; function exit(address, uint) public virtual; } abstract contract HopeLike { function hope(address) public virtual; function nope(address) public virtual; } abstract contract EndLike { function fix(bytes32) public virtual view returns (uint); function cash(bytes32, uint) public virtual; function free(bytes32) public virtual; function pack(uint) public virtual; function skim(bytes32, address) public virtual; } abstract contract JugLike { function drip(bytes32) public virtual; } abstract contract PotLike { function chi() public virtual view returns (uint); function pie(address) public virtual view returns (uint); function drip() public virtual; function join(uint) public virtual; function exit(uint) public virtual; } abstract contract ProxyRegistryLike { function proxies(address) public virtual view returns (address); function build(address) public virtual returns (address); } abstract contract ProxyLike { function owner() public virtual view returns (address); } abstract contract DssProxyActions { function daiJoin_join(address apt, address urn, uint wad) public virtual; function transfer(address gem, address dst, uint wad) public virtual; function ethJoin_join(address apt, address urn) public virtual payable; function gemJoin_join(address apt, address urn, uint wad, bool transferFrom) public virtual payable; function hope(address obj, address usr) public virtual; function nope(address obj, address usr) public virtual; function open(address manager, bytes32 ilk, address usr) public virtual returns (uint cdp); function give(address manager, uint cdp, address usr) public virtual; function giveToProxy(address proxyRegistry, address manager, uint cdp, address dst) public virtual; function cdpAllow(address manager, uint cdp, address usr, uint ok) public virtual; function urnAllow(address manager, address usr, uint ok) public virtual; function flux(address manager, uint cdp, address dst, uint wad) public virtual; function move(address manager, uint cdp, address dst, uint rad) public virtual; function frob(address manager, uint cdp, int dink, int dart) public virtual; function frob(address manager, uint cdp, address dst, int dink, int dart) public virtual; function quit(address manager, uint cdp, address dst) public virtual; function enter(address manager, address src, uint cdp) public virtual; function shift(address manager, uint cdpSrc, uint cdpOrg) public virtual; function makeGemBag(address gemJoin) public virtual returns (address bag); function lockETH(address manager, address ethJoin, uint cdp) public virtual payable; function safeLockETH(address manager, address ethJoin, uint cdp, address owner) public virtual payable; function lockGem(address manager, address gemJoin, uint cdp, uint wad, bool transferFrom) public virtual; function safeLockGem(address manager, address gemJoin, uint cdp, uint wad, bool transferFrom, address owner) public virtual; function freeETH(address manager, address ethJoin, uint cdp, uint wad) public virtual; function freeGem(address manager, address gemJoin, uint cdp, uint wad) public virtual; function draw(address manager, address jug, address daiJoin, uint cdp, uint wad) public virtual; function wipe(address manager, address daiJoin, uint cdp, uint wad) public virtual; function safeWipe(address manager, address daiJoin, uint cdp, uint wad, address owner) public virtual; function wipeAll(address manager, address daiJoin, uint cdp) public virtual; function safeWipeAll(address manager, address daiJoin, uint cdp, address owner) public virtual; function lockETHAndDraw(address manager, address jug, address ethJoin, address daiJoin, uint cdp, uint wadD) public virtual payable; function openLockETHAndDraw(address manager, address jug, address ethJoin, address daiJoin, bytes32 ilk, uint wadD) public virtual payable returns (uint cdp); function lockGemAndDraw(address manager, address jug, address gemJoin, address daiJoin, uint cdp, uint wadC, uint wadD, bool transferFrom) public virtual; function openLockGemAndDraw(address manager, address jug, address gemJoin, address daiJoin, bytes32 ilk, uint wadC, uint wadD, bool transferFrom) public virtual returns (uint cdp); function openLockGNTAndDraw(address manager, address jug, address gntJoin, address daiJoin, bytes32 ilk, uint wadC, uint wadD) public virtual returns (address bag, uint cdp); function wipeAndFreeETH(address manager, address ethJoin, address daiJoin, uint cdp, uint wadC, uint wadD) public virtual; function wipeAllAndFreeETH(address manager, address ethJoin, address daiJoin, uint cdp, uint wadC) public virtual; function wipeAndFreeGem(address manager, address gemJoin, address daiJoin, uint cdp, uint wadC, uint wadD) public virtual; function wipeAllAndFreeGem(address manager, address gemJoin, address daiJoin, uint cdp, uint wadC) public virtual; } abstract contract DaiJoin { function vat() public virtual returns (Vat); function dai() public virtual returns (Gem); function join(address, uint) public virtual payable; function exit(address, uint) public virtual; } abstract contract DssProxyActionsDsr { function join(address daiJoin, address pot, uint wad) virtual public; function exit(address daiJoin, address pot, uint wad) virtual public; function exitAll(address daiJoin, address pot) virtual public; } interface ERC20 { function totalSupply() external view returns (uint256 supply); function balanceOf(address _owner) external view returns (uint256 balance); function transfer(address _to, uint256 _value) external returns (bool success); function transferFrom(address _from, address _to, uint256 _value) external returns (bool success); function approve(address _spender, uint256 _value) external returns (bool success); function allowance(address _owner, address _spender) external view returns (uint256 remaining); function decimals() external view returns (uint256 digits); event Approval(address indexed _owner, address indexed _spender, uint256 _value); } interface ExchangeInterface { function swapEtherToToken(uint256 _ethAmount, address _tokenAddress, uint256 _maxAmount) external payable returns (uint256, uint256); function swapTokenToEther(address _tokenAddress, uint256 _amount, uint256 _maxAmount) external returns (uint256); function swapTokenToToken(address _src, address _dest, uint256 _amount) external payable returns (uint256); function getExpectedRate(address src, address dest, uint256 srcQty) external view returns (uint256 expectedRate); } interface ExchangeInterfaceV2 { function sell(address _srcAddr, address _destAddr, uint _srcAmount) external payable returns (uint); function buy(address _srcAddr, address _destAddr, uint _destAmount) external payable returns(uint); function getSellRate(address _srcAddr, address _destAddr, uint _srcAmount) external view returns (uint); function getBuyRate(address _srcAddr, address _destAddr, uint _srcAmount) external view returns (uint); } abstract contract Faucet { function gulp(address) public virtual; } abstract contract Flipper { function bids(uint _bidId) public virtual returns (uint256, uint256, address, uint48, uint48, address, address, uint256); function tend(uint id, uint lot, uint bid) virtual external; function dent(uint id, uint lot, uint bid) virtual external; function deal(uint id) virtual external; } abstract contract GasTokenInterface is ERC20 { function free(uint256 value) public virtual returns (bool success); function freeUpTo(uint256 value) public virtual returns (uint256 freed); function freeFrom(address from, uint256 value) public virtual returns (bool success); function freeFromUpTo(address from, uint256 value) public virtual returns (uint256 freed); } abstract contract Gem { function dec() virtual public returns (uint); function gem() virtual public returns (Gem); function join(address, uint) virtual public payable; function exit(address, uint) virtual public; function approve(address, uint) virtual public; function transfer(address, uint) virtual public returns (bool); function transferFrom(address, address, uint) virtual public returns (bool); function deposit() virtual public payable; function withdraw(uint) virtual public; function allowance(address, address) virtual public returns (uint); } abstract contract GetCdps { function getCdpsAsc(address manager, address guy) external view virtual returns (uint[] memory ids, address[] memory urns, bytes32[] memory ilks); function getCdpsDesc(address manager, address guy) external view virtual returns (uint[] memory ids, address[] memory urns, bytes32[] memory ilks); } abstract contract IAToken { function redeem(uint256 _amount) external virtual; } abstract contract IAaveSubscription { function subscribe(uint128 _minRatio, uint128 _maxRatio, uint128 _optimalBoost, uint128 _optimalRepay, bool _boostEnabled) public virtual; function unsubscribe() public virtual; } abstract contract ICompoundSubscription { function subscribe(uint128 _minRatio, uint128 _maxRatio, uint128 _optimalBoost, uint128 _optimalRepay, bool _boostEnabled) public virtual; function unsubscribe() public virtual; } abstract contract ILendingPool { function flashLoan( address payable _receiver, address _reserve, uint _amount, bytes calldata _params) external virtual; function deposit(address _reserve, uint256 _amount, uint16 _referralCode) external virtual payable; function setUserUseReserveAsCollateral(address _reserve, bool _useAsCollateral) external virtual; function borrow(address _reserve, uint256 _amount, uint256 _interestRateMode, uint16 _referralCode) external virtual; function repay( address _reserve, uint256 _amount, address payable _onBehalfOf) external virtual payable; function swapBorrowRateMode(address _reserve) external virtual; function getReserves() external virtual view returns(address[] memory); /// @param _reserve underlying token address function getReserveData(address _reserve) external virtual view returns ( uint256 totalLiquidity, // reserve total liquidity uint256 availableLiquidity, // reserve available liquidity for borrowing uint256 totalBorrowsStable, // total amount of outstanding borrows at Stable rate uint256 totalBorrowsVariable, // total amount of outstanding borrows at Variable rate uint256 liquidityRate, // current deposit APY of the reserve for depositors, in Ray units. uint256 variableBorrowRate, // current variable rate APY of the reserve pool, in Ray units. uint256 stableBorrowRate, // current stable rate APY of the reserve pool, in Ray units. uint256 averageStableBorrowRate, // current average stable borrow rate uint256 utilizationRate, // expressed as total borrows/total liquidity. uint256 liquidityIndex, // cumulative liquidity index uint256 variableBorrowIndex, // cumulative variable borrow index address aTokenAddress, // aTokens contract address for the specific _reserve uint40 lastUpdateTimestamp // timestamp of the last update of reserve data ); /// @param _user users address function getUserAccountData(address _user) external virtual view returns ( uint256 totalLiquidityETH, // user aggregated deposits across all the reserves. In Wei uint256 totalCollateralETH, // user aggregated collateral across all the reserves. In Wei uint256 totalBorrowsETH, // user aggregated outstanding borrows across all the reserves. In Wei uint256 totalFeesETH, // user aggregated current outstanding fees in ETH. In Wei uint256 availableBorrowsETH, // user available amount to borrow in ETH uint256 currentLiquidationThreshold, // user current average liquidation threshold across all the collaterals deposited uint256 ltv, // user average Loan-to-Value between all the collaterals uint256 healthFactor // user current Health Factor ); /// @param _reserve underlying token address /// @param _user users address function getUserReserveData(address _reserve, address _user) external virtual view returns ( uint256 currentATokenBalance, // user current reserve aToken balance uint256 currentBorrowBalance, // user current reserve outstanding borrow balance uint256 principalBorrowBalance, // user balance of borrowed asset uint256 borrowRateMode, // user borrow rate mode either Stable or Variable uint256 borrowRate, // user current borrow rate APY uint256 liquidityRate, // user current earn rate on _reserve uint256 originationFee, // user outstanding loan origination fee uint256 variableBorrowIndex, // user variable cumulative index uint256 lastUpdateTimestamp, // Timestamp of the last data update bool usageAsCollateralEnabled // Whether the user's current reserve is enabled as a collateral ); function getReserveConfigurationData(address _reserve) external virtual view returns ( uint256 ltv, uint256 liquidationThreshold, uint256 liquidationBonus, address rateStrategyAddress, bool usageAsCollateralEnabled, bool borrowingEnabled, bool stableBorrowRateEnabled, bool isActive ); // ------------------ LendingPoolCoreData ------------------------ function getReserveATokenAddress(address _reserve) public virtual view returns (address); function getReserveConfiguration(address _reserve) external virtual view returns (uint256, uint256, uint256, bool); function getUserUnderlyingAssetBalance(address _reserve, address _user) public virtual view returns (uint256); function getReserveCurrentLiquidityRate(address _reserve) public virtual view returns (uint256); function getReserveCurrentVariableBorrowRate(address _reserve) public virtual view returns (uint256); function getReserveTotalLiquidity(address _reserve) public virtual view returns (uint256); function getReserveAvailableLiquidity(address _reserve) public virtual view returns (uint256); function getReserveTotalBorrowsVariable(address _reserve) public virtual view returns (uint256); // ---------------- LendingPoolDataProvider --------------------- function calculateUserGlobalData(address _user) public virtual view returns ( uint256 totalLiquidityBalanceETH, uint256 totalCollateralBalanceETH, uint256 totalBorrowBalanceETH, uint256 totalFeesETH, uint256 currentLtv, uint256 currentLiquidationThreshold, uint256 healthFactor, bool healthFactorBelowThreshold ); } abstract contract ILendingPoolAddressesProvider { function getLendingPool() public virtual view returns (address); function getLendingPoolCore() public virtual view returns (address payable); function getLendingPoolConfigurator() public virtual view returns (address); function getLendingPoolDataProvider() public virtual view returns (address); function getLendingPoolParametersProvider() public virtual view returns (address); function getTokenDistributor() public virtual view returns (address); function getFeeProvider() public virtual view returns (address); function getLendingPoolLiquidationManager() public virtual view returns (address); function getLendingPoolManager() public virtual view returns (address); function getPriceOracle() public virtual view returns (address); function getLendingRateOracle() public virtual view returns (address); } abstract contract ILoanShifter { function getLoanAmount(uint, address) public view virtual returns(uint); function getUnderlyingAsset(address _addr) public view virtual returns (address); } abstract contract IPriceOracleGetterAave { function getAssetPrice(address _asset) external virtual view returns (uint256); function getAssetsPrices(address[] calldata _assets) external virtual view returns(uint256[] memory); function getSourceOfAsset(address _asset) external virtual view returns(address); function getFallbackOracle() external virtual view returns(address); } abstract contract ITokenInterface is ERC20 { function assetBalanceOf(address _owner) public virtual view returns (uint256); function mint(address receiver, uint256 depositAmount) external virtual returns (uint256 mintAmount); function burn(address receiver, uint256 burnAmount) external virtual returns (uint256 loanAmountPaid); function tokenPrice() public virtual view returns (uint256 price); } abstract contract Join { bytes32 public ilk; function dec() virtual public view returns (uint); function gem() virtual public view returns (Gem); function join(address, uint) virtual public payable; function exit(address, uint) virtual public; } abstract contract Jug { struct Ilk { uint256 duty; uint256 rho; } mapping (bytes32 => Ilk) public ilks; function drip(bytes32) public virtual returns (uint); } abstract contract KyberNetworkProxyInterface { function maxGasPrice() external virtual view returns (uint256); function getUserCapInWei(address user) external virtual view returns (uint256); function getUserCapInTokenWei(address user, ERC20 token) external virtual view returns (uint256); function enabled() external virtual view returns (bool); function info(bytes32 id) external virtual view returns (uint256); function getExpectedRate(ERC20 src, ERC20 dest, uint256 srcQty) public virtual view returns (uint256 expectedRate, uint256 slippageRate); function tradeWithHint( ERC20 src, uint256 srcAmount, ERC20 dest, address destAddress, uint256 maxDestAmount, uint256 minConversionRate, address walletId, bytes memory hint ) public virtual payable returns (uint256); function trade( ERC20 src, uint256 srcAmount, ERC20 dest, address destAddress, uint256 maxDestAmount, uint256 minConversionRate, address walletId ) public virtual payable returns (uint256); function swapEtherToToken(ERC20 token, uint256 minConversionRate) external virtual payable returns (uint256); function swapTokenToEther(ERC20 token, uint256 tokenQty, uint256 minRate) external virtual payable returns (uint256); function swapTokenToToken(ERC20 src, uint256 srcAmount, ERC20 dest, uint256 minConversionRate) public virtual returns (uint256); } abstract contract Manager { function last(address) virtual public returns (uint); function cdpCan(address, uint, address) virtual public view returns (uint); function ilks(uint) virtual public view returns (bytes32); function owns(uint) virtual public view returns (address); function urns(uint) virtual public view returns (address); function vat() virtual public view returns (address); function open(bytes32, address) virtual public returns (uint); function give(uint, address) virtual public; function cdpAllow(uint, address, uint) virtual public; function urnAllow(address, uint) virtual public; function frob(uint, int, int) virtual public; function flux(uint, address, uint) virtual public; function move(uint, address, uint) virtual public; function exit(address, uint, address, uint) virtual public; function quit(uint, address) virtual public; function enter(address, uint) virtual public; function shift(uint, uint) virtual public; } abstract contract OasisInterface { function getBuyAmount(address tokenToBuy, address tokenToPay, uint256 amountToPay) external virtual view returns (uint256 amountBought); function getPayAmount(address tokenToPay, address tokenToBuy, uint256 amountToBuy) public virtual view returns (uint256 amountPaid); function sellAllAmount(address pay_gem, uint256 pay_amt, address buy_gem, uint256 min_fill_amount) public virtual returns (uint256 fill_amt); function buyAllAmount(address buy_gem, uint256 buy_amt, address pay_gem, uint256 max_fill_amount) public virtual returns (uint256 fill_amt); } abstract contract Osm { mapping(address => uint256) public bud; function peep() external view virtual returns (bytes32, bool); } abstract contract OsmMom { mapping (bytes32 => address) public osms; } abstract contract OtcInterface { function buyAllAmount(address, uint256, address, uint256) public virtual returns (uint256); function getPayAmount(address, address, uint256) public virtual view returns (uint256); function getBuyAmount(address, address, uint256) public virtual view returns (uint256); } abstract contract PipInterface { function read() public virtual returns (bytes32); } abstract contract ProxyRegistryInterface { function proxies(address _owner) public virtual view returns (address); function build(address) public virtual returns (address); } abstract contract SaverExchangeInterface { function getBestPrice( uint256 _amount, address _srcToken, address _destToken, uint256 _exchangeType ) public view virtual returns (address, uint256); } abstract contract Spotter { struct Ilk { PipInterface pip; uint256 mat; } mapping (bytes32 => Ilk) public ilks; uint256 public par; } abstract contract TokenInterface { function allowance(address, address) public virtual returns (uint256); function balanceOf(address) public virtual returns (uint256); function approve(address, uint256) public virtual; function transfer(address, uint256) public virtual returns (bool); function transferFrom(address, address, uint256) public virtual returns (bool); function deposit() public virtual payable; function withdraw(uint256) public virtual; } abstract contract UniswapExchangeInterface { function getEthToTokenInputPrice(uint256 eth_sold) external virtual view returns (uint256 tokens_bought); function getEthToTokenOutputPrice(uint256 tokens_bought) external virtual view returns (uint256 eth_sold); function getTokenToEthInputPrice(uint256 tokens_sold) external virtual view returns (uint256 eth_bought); function getTokenToEthOutputPrice(uint256 eth_bought) external virtual view returns (uint256 tokens_sold); function tokenToEthTransferInput( uint256 tokens_sold, uint256 min_eth, uint256 deadline, address recipient ) external virtual returns (uint256 eth_bought); function ethToTokenTransferInput(uint256 min_tokens, uint256 deadline, address recipient) external virtual payable returns (uint256 tokens_bought); function tokenToTokenTransferInput( uint256 tokens_sold, uint256 min_tokens_bought, uint256 min_eth_bought, uint256 deadline, address recipient, address token_addr ) external virtual returns (uint256 tokens_bought); function ethToTokenTransferOutput( uint256 tokens_bought, uint256 deadline, address recipient ) external virtual payable returns (uint256 eth_sold); function tokenToEthTransferOutput( uint256 eth_bought, uint256 max_tokens, uint256 deadline, address recipient ) external virtual returns (uint256 tokens_sold); function tokenToTokenTransferOutput( uint256 tokens_bought, uint256 max_tokens_sold, uint256 max_eth_sold, uint256 deadline, address recipient, address token_addr ) external virtual returns (uint256 tokens_sold); } abstract contract UniswapFactoryInterface { function getExchange(address token) external view virtual returns (address exchange); } abstract contract UniswapRouterInterface { function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline) external virtual returns (uint[] memory amounts); function swapExactTokensForTokens( uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline ) external virtual returns (uint[] memory amounts); function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline) external virtual returns (uint[] memory amounts); function swapTokensForExactTokens( uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline ) external virtual returns (uint[] memory amounts); function getAmountsOut(uint amountIn, address[] memory path) public virtual view returns (uint[] memory amounts); function getAmountsIn(uint amountOut, address[] memory path) public virtual view returns (uint[] memory amounts); } abstract contract Vat { struct Urn { uint256 ink; // Locked Collateral [wad] uint256 art; // Normalised Debt [wad] } struct Ilk { uint256 Art; // Total Normalised Debt [wad] uint256 rate; // Accumulated Rates [ray] uint256 spot; // Price with Safety Margin [ray] uint256 line; // Debt Ceiling [rad] uint256 dust; // Urn Debt Floor [rad] } mapping (bytes32 => mapping (address => Urn )) public urns; mapping (bytes32 => Ilk) public ilks; mapping (bytes32 => mapping (address => uint)) public gem; // [wad] function can(address, address) virtual public view returns (uint); function dai(address) virtual public view returns (uint); function frob(bytes32, address, address, address, int, int) virtual public; function hope(address) virtual public; function move(address, address, uint) virtual public; function fork(bytes32, address, address, int, int) virtual public; } contract DefisaverLogger { event LogEvent( address indexed contractAddress, address indexed caller, string indexed logName, bytes data ); // solhint-disable-next-line func-name-mixedcase function Log(address _contract, address _caller, string memory _logName, bytes memory _data) public { emit LogEvent(_contract, _caller, _logName, _data); } } contract MCDMonitorProxyV2 is AdminAuth { uint public CHANGE_PERIOD; address public monitor; address public newMonitor; address public lastMonitor; uint public changeRequestedTimestamp; mapping(address => bool) public allowed; event MonitorChangeInitiated(address oldMonitor, address newMonitor); event MonitorChangeCanceled(); event MonitorChangeFinished(address monitor); event MonitorChangeReverted(address monitor); // if someone who is allowed become malicious, owner can't be changed modifier onlyAllowed() { require(allowed[msg.sender] || msg.sender == owner); _; } modifier onlyMonitor() { require (msg.sender == monitor); _; } constructor(uint _changePeriod) public { CHANGE_PERIOD = _changePeriod * 1 days; } /// @notice Only monitor contract is able to call execute on users proxy /// @param _owner Address of cdp owner (users DSProxy address) /// @param _saverProxy Address of MCDSaverProxy /// @param _data Data to send to MCDSaverProxy function callExecute(address _owner, address _saverProxy, bytes memory _data) public payable onlyMonitor { // execute reverts if calling specific method fails DSProxyInterface(_owner).execute{value: msg.value}(_saverProxy, _data); // return if anything left if (address(this).balance > 0) { msg.sender.transfer(address(this).balance); } } /// @notice Allowed users are able to set Monitor contract without any waiting period first time /// @param _monitor Address of Monitor contract function setMonitor(address _monitor) public onlyAllowed { require(monitor == address(0)); monitor = _monitor; } /// @notice Allowed users are able to start procedure for changing monitor /// @dev after CHANGE_PERIOD needs to call confirmNewMonitor to actually make a change /// @param _newMonitor address of new monitor function changeMonitor(address _newMonitor) public onlyAllowed { require(changeRequestedTimestamp == 0); changeRequestedTimestamp = now; lastMonitor = monitor; newMonitor = _newMonitor; emit MonitorChangeInitiated(lastMonitor, newMonitor); } /// @notice At any point allowed users are able to cancel monitor change function cancelMonitorChange() public onlyAllowed { require(changeRequestedTimestamp > 0); changeRequestedTimestamp = 0; newMonitor = address(0); emit MonitorChangeCanceled(); } /// @notice Anyone is able to confirm new monitor after CHANGE_PERIOD if process is started function confirmNewMonitor() public onlyAllowed { require((changeRequestedTimestamp + CHANGE_PERIOD) < now); require(changeRequestedTimestamp != 0); require(newMonitor != address(0)); monitor = newMonitor; newMonitor = address(0); changeRequestedTimestamp = 0; emit MonitorChangeFinished(monitor); } /// @notice Its possible to revert monitor to last used monitor function revertMonitor() public onlyAllowed { require(lastMonitor != address(0)); monitor = lastMonitor; emit MonitorChangeReverted(monitor); } /// @notice Allowed users are able to add new allowed user /// @param _user Address of user that will be allowed function addAllowed(address _user) public onlyAllowed { allowed[_user] = true; } /// @notice Allowed users are able to remove allowed user /// @dev owner is always allowed even if someone tries to remove it from allowed mapping /// @param _user Address of allowed user function removeAllowed(address _user) public onlyAllowed { allowed[_user] = false; } function setChangePeriod(uint _periodInDays) public onlyAllowed { require(_periodInDays * 1 days > CHANGE_PERIOD); CHANGE_PERIOD = _periodInDays * 1 days; } } contract MCDPriceVerifier is AdminAuth { OsmMom public osmMom = OsmMom(0x76416A4d5190d071bfed309861527431304aA14f); Manager public manager = Manager(0x5ef30b9986345249bc32d8928B7ee64DE9435E39); mapping(address => bool) public authorized; function verifyVaultNextPrice(uint _nextPrice, uint _cdpId) public view returns(bool) { require(authorized[msg.sender]); bytes32 ilk = manager.ilks(_cdpId); return verifyNextPrice(_nextPrice, ilk); } function verifyNextPrice(uint _nextPrice, bytes32 _ilk) public view returns(bool) { require(authorized[msg.sender]); address osmAddress = osmMom.osms(_ilk); uint whitelisted = Osm(osmAddress).bud(address(this)); // If contracts doesn't have access return true if (whitelisted != 1) return true; (bytes32 price, bool has) = Osm(osmAddress).peep(); return has ? uint(price) == _nextPrice : false; } function setAuthorized(address _address, bool _allowed) public onlyOwner { authorized[_address] = _allowed; } } abstract contract StaticV2 { enum Method { Boost, Repay } struct CdpHolder { uint128 minRatio; uint128 maxRatio; uint128 optimalRatioBoost; uint128 optimalRatioRepay; address owner; uint cdpId; bool boostEnabled; bool nextPriceEnabled; } struct SubPosition { uint arrPos; bool subscribed; } } contract SubscriptionsInterfaceV2 { function subscribe(uint _cdpId, uint128 _minRatio, uint128 _maxRatio, uint128 _optimalBoost, uint128 _optimalRepay, bool _boostEnabled, bool _nextPriceEnabled) external {} function unsubscribe(uint _cdpId) external {} } contract SubscriptionsProxyV2 { address public constant MONITOR_PROXY_ADDRESS = 0x7456f4218874eAe1aF8B83a64848A1B89fEB7d7C; address public constant OLD_SUBSCRIPTION = 0x83152CAA0d344a2Fd428769529e2d490A88f4393; address public constant FACTORY_ADDRESS = 0x5a15566417e6C1c9546523066500bDDBc53F88C7; function migrate(uint _cdpId, uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled, bool _nextPriceEnabled, address _subscriptions) public { SubscriptionsInterfaceV2(OLD_SUBSCRIPTION).unsubscribe(_cdpId); subscribe(_cdpId, _minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled, _nextPriceEnabled, _subscriptions); } function subscribe(uint _cdpId, uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled, bool _nextPriceEnabled, address _subscriptions) public { address currAuthority = address(DSAuth(address(this)).authority()); DSGuard guard = DSGuard(currAuthority); if (currAuthority == address(0)) { guard = DSGuardFactory(FACTORY_ADDRESS).newGuard(); DSAuth(address(this)).setAuthority(DSAuthority(address(guard))); } guard.permit(MONITOR_PROXY_ADDRESS, address(this), bytes4(keccak256("execute(address,bytes)"))); SubscriptionsInterfaceV2(_subscriptions).subscribe(_cdpId, _minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled, _nextPriceEnabled); } function update(uint _cdpId, uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled, bool _nextPriceEnabled, address _subscriptions) public { SubscriptionsInterfaceV2(_subscriptions).subscribe(_cdpId, _minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled, _nextPriceEnabled); } function unsubscribe(uint _cdpId, address _subscriptions) public { SubscriptionsInterfaceV2(_subscriptions).unsubscribe(_cdpId); } } contract SubscriptionsV2 is AdminAuth, StaticV2 { bytes32 internal constant ETH_ILK = 0x4554482d41000000000000000000000000000000000000000000000000000000; bytes32 internal constant BAT_ILK = 0x4241542d41000000000000000000000000000000000000000000000000000000; address public constant MANAGER_ADDRESS = 0x5ef30b9986345249bc32d8928B7ee64DE9435E39; address public constant VAT_ADDRESS = 0x35D1b3F3D7966A1DFe207aa4514C12a259A0492B; address public constant SPOTTER_ADDRESS = 0x65C79fcB50Ca1594B025960e539eD7A9a6D434A3; CdpHolder[] public subscribers; mapping (uint => SubPosition) public subscribersPos; mapping (bytes32 => uint) public minLimits; uint public changeIndex; Manager public manager = Manager(MANAGER_ADDRESS); Vat public vat = Vat(VAT_ADDRESS); Spotter public spotter = Spotter(SPOTTER_ADDRESS); MCDSaverProxy public saverProxy; event Subscribed(address indexed owner, uint cdpId); event Unsubscribed(address indexed owner, uint cdpId); event Updated(address indexed owner, uint cdpId); event ParamUpdates(address indexed owner, uint cdpId, uint128, uint128, uint128, uint128, bool boostEnabled); /// @param _saverProxy Address of the MCDSaverProxy contract constructor(address _saverProxy) public { saverProxy = MCDSaverProxy(payable(_saverProxy)); minLimits[ETH_ILK] = 1700000000000000000; minLimits[BAT_ILK] = 1700000000000000000; } /// @dev Called by the DSProxy contract which owns the CDP /// @notice Adds the users CDP in the list of subscriptions so it can be monitored /// @param _cdpId Id of the CDP /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalBoost Ratio amount which boost should target /// @param _optimalRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled /// @param _nextPriceEnabled Boolean determing if we can use nextPrice for this cdp function subscribe(uint _cdpId, uint128 _minRatio, uint128 _maxRatio, uint128 _optimalBoost, uint128 _optimalRepay, bool _boostEnabled, bool _nextPriceEnabled) external { require(isOwner(msg.sender, _cdpId), "Must be called by Cdp owner"); // if boost is not enabled, set max ratio to max uint uint128 localMaxRatio = _boostEnabled ? _maxRatio : uint128(-1); require(checkParams(manager.ilks(_cdpId), _minRatio, localMaxRatio), "Must be correct params"); SubPosition storage subInfo = subscribersPos[_cdpId]; CdpHolder memory subscription = CdpHolder({ minRatio: _minRatio, maxRatio: localMaxRatio, optimalRatioBoost: _optimalBoost, optimalRatioRepay: _optimalRepay, owner: msg.sender, cdpId: _cdpId, boostEnabled: _boostEnabled, nextPriceEnabled: _nextPriceEnabled }); changeIndex++; if (subInfo.subscribed) { subscribers[subInfo.arrPos] = subscription; emit Updated(msg.sender, _cdpId); emit ParamUpdates(msg.sender, _cdpId, _minRatio, localMaxRatio, _optimalBoost, _optimalRepay, _boostEnabled); } else { subscribers.push(subscription); subInfo.arrPos = subscribers.length - 1; subInfo.subscribed = true; emit Subscribed(msg.sender, _cdpId); } } /// @notice Called by the users DSProxy /// @dev Owner who subscribed cancels his subscription function unsubscribe(uint _cdpId) external { require(isOwner(msg.sender, _cdpId), "Must be called by Cdp owner"); _unsubscribe(_cdpId); } /// @dev Checks if the _owner is the owner of the CDP function isOwner(address _owner, uint _cdpId) internal view returns (bool) { return getOwner(_cdpId) == _owner; } /// @dev Checks limit for minimum ratio and if minRatio is bigger than max function checkParams(bytes32 _ilk, uint128 _minRatio, uint128 _maxRatio) internal view returns (bool) { if (_minRatio < minLimits[_ilk]) { return false; } if (_minRatio > _maxRatio) { return false; } return true; } /// @dev Internal method to remove a subscriber from the list function _unsubscribe(uint _cdpId) internal { require(subscribers.length > 0, "Must have subscribers in the list"); SubPosition storage subInfo = subscribersPos[_cdpId]; require(subInfo.subscribed, "Must first be subscribed"); uint lastCdpId = subscribers[subscribers.length - 1].cdpId; SubPosition storage subInfo2 = subscribersPos[lastCdpId]; subInfo2.arrPos = subInfo.arrPos; subscribers[subInfo.arrPos] = subscribers[subscribers.length - 1]; subscribers.pop(); changeIndex++; subInfo.subscribed = false; subInfo.arrPos = 0; emit Unsubscribed(msg.sender, _cdpId); } /// @notice Returns an address that owns the CDP /// @param _cdpId Id of the CDP function getOwner(uint _cdpId) public view returns(address) { return manager.owns(_cdpId); } /// @notice Helper method for the front to get all the info about the subscribed CDP function getSubscribedInfo(uint _cdpId) public view returns(bool, uint128, uint128, uint128, uint128, address, uint coll, uint debt) { SubPosition memory subInfo = subscribersPos[_cdpId]; if (!subInfo.subscribed) return (false, 0, 0, 0, 0, address(0), 0, 0); (coll, debt) = saverProxy.getCdpInfo(manager, _cdpId, manager.ilks(_cdpId)); CdpHolder memory subscriber = subscribers[subInfo.arrPos]; return ( true, subscriber.minRatio, subscriber.maxRatio, subscriber.optimalRatioRepay, subscriber.optimalRatioBoost, subscriber.owner, coll, debt ); } function getCdpHolder(uint _cdpId) public view returns (bool subscribed, CdpHolder memory) { SubPosition memory subInfo = subscribersPos[_cdpId]; if (!subInfo.subscribed) return (false, CdpHolder(0, 0, 0, 0, address(0), 0, false, false)); CdpHolder memory subscriber = subscribers[subInfo.arrPos]; return (true, subscriber); } /// @notice Helper method for the front to get the information about the ilk of a CDP function getIlkInfo(bytes32 _ilk, uint _cdpId) public view returns(bytes32 ilk, uint art, uint rate, uint spot, uint line, uint dust, uint mat, uint par) { // send either ilk or cdpId if (_ilk == bytes32(0)) { _ilk = manager.ilks(_cdpId); } ilk = _ilk; (,mat) = spotter.ilks(_ilk); par = spotter.par(); (art, rate, spot, line, dust) = vat.ilks(_ilk); } /// @notice Helper method to return all the subscribed CDPs function getSubscribers() public view returns (CdpHolder[] memory) { return subscribers; } /// @notice Helper method to return all the subscribed CDPs function getSubscribersByPage(uint _page, uint _perPage) public view returns (CdpHolder[] memory) { CdpHolder[] memory holders = new CdpHolder[](_perPage); uint start = _page * _perPage; uint end = start + _perPage; uint count = 0; for (uint i=start; i<end; i++) { holders[count] = subscribers[i]; count++; } return holders; } ////////////// ADMIN METHODS /////////////////// /// @notice Admin function to change a min. limit for an asset function changeMinRatios(bytes32 _ilk, uint _newRatio) public onlyOwner { minLimits[_ilk] = _newRatio; } /// @notice Admin function to unsubscribe a CDP function unsubscribeByAdmin(uint _cdpId) public onlyOwner { SubPosition storage subInfo = subscribersPos[_cdpId]; if (subInfo.subscribed) { _unsubscribe(_cdpId); } } } contract BidProxy { address public constant DAI_JOIN = 0x9759A6Ac90977b93B58547b4A71c78317f391A28; address public constant VAT_ADDRESS = 0x35D1b3F3D7966A1DFe207aa4514C12a259A0492B; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; function daiBid(uint _bidId, uint _amount, address _flipper) public { uint tendAmount = _amount * (10 ** 27); joinDai(_amount); (, uint lot, , , , , , ) = Flipper(_flipper).bids(_bidId); Vat(VAT_ADDRESS).hope(_flipper); Flipper(_flipper).tend(_bidId, lot, tendAmount); } function collateralBid(uint _bidId, uint _amount, address _flipper) public { (uint bid, , , , , , , ) = Flipper(_flipper).bids(_bidId); joinDai(bid / (10**27)); Vat(VAT_ADDRESS).hope(_flipper); Flipper(_flipper).dent(_bidId, _amount, bid); } function closeBid(uint _bidId, address _flipper, address _joinAddr) public { bytes32 ilk = Join(_joinAddr).ilk(); Flipper(_flipper).deal(_bidId); uint amount = Vat(VAT_ADDRESS).gem(ilk, address(this)); Vat(VAT_ADDRESS).hope(_joinAddr); Gem(_joinAddr).exit(msg.sender, amount); } function exitCollateral(address _joinAddr) public { bytes32 ilk = Join(_joinAddr).ilk(); uint amount = Vat(VAT_ADDRESS).gem(ilk, address(this)); Vat(VAT_ADDRESS).hope(_joinAddr); Gem(_joinAddr).exit(msg.sender, amount); } function exitDai() public { uint amount = Vat(VAT_ADDRESS).dai(address(this)) / (10**27); Vat(VAT_ADDRESS).hope(DAI_JOIN); Gem(DAI_JOIN).exit(msg.sender, amount); } function withdrawToken(address _token) public { uint balance = ERC20(_token).balanceOf(address(this)); ERC20(_token).transfer(msg.sender, balance); } function withdrawEth() public { uint balance = address(this).balance; msg.sender.transfer(balance); } function joinDai(uint _amount) internal { uint amountInVat = Vat(VAT_ADDRESS).dai(address(this)) / (10**27); if (_amount > amountInVat) { uint amountDiff = (_amount - amountInVat) + 1; ERC20(DAI_ADDRESS).transferFrom(msg.sender, address(this), amountDiff); ERC20(DAI_ADDRESS).approve(DAI_JOIN, amountDiff); Join(DAI_JOIN).join(address(this), amountDiff); } } } abstract contract IMCDSubscriptions { function unsubscribe(uint256 _cdpId) external virtual ; function subscribersPos(uint256 _cdpId) external virtual returns (uint256, bool); } abstract contract GemLike { function approve(address, uint256) public virtual; function transfer(address, uint256) public virtual; function transferFrom(address, address, uint256) public virtual; function deposit() public virtual payable; function withdraw(uint256) public virtual; } abstract contract ManagerLike { function cdpCan(address, uint256, address) public virtual view returns (uint256); function ilks(uint256) public virtual view returns (bytes32); function owns(uint256) public virtual view returns (address); function urns(uint256) public virtual view returns (address); function vat() public virtual view returns (address); function open(bytes32, address) public virtual returns (uint256); function give(uint256, address) public virtual; function cdpAllow(uint256, address, uint256) public virtual; function urnAllow(address, uint256) public virtual; function frob(uint256, int256, int256) public virtual; function flux(uint256, address, uint256) public virtual; function move(uint256, address, uint256) public virtual; function exit(address, uint256, address, uint256) public virtual; function quit(uint256, address) public virtual; function enter(address, uint256) public virtual; function shift(uint256, uint256) public virtual; } abstract contract VatLike { function can(address, address) public virtual view returns (uint256); function ilks(bytes32) public virtual view returns (uint256, uint256, uint256, uint256, uint256); function dai(address) public virtual view returns (uint256); function urns(bytes32, address) public virtual view returns (uint256, uint256); function frob(bytes32, address, address, address, int256, int256) public virtual; function hope(address) public virtual; function move(address, address, uint256) public virtual; } abstract contract GemJoinLike { function dec() public virtual returns (uint256); function gem() public virtual returns (GemLike); function join(address, uint256) public virtual payable; function exit(address, uint256) public virtual; } abstract contract GNTJoinLike { function bags(address) public virtual view returns (address); function make(address) public virtual returns (address); } abstract contract DaiJoinLike { function vat() public virtual returns (VatLike); function dai() public virtual returns (GemLike); function join(address, uint256) public virtual payable; function exit(address, uint256) public virtual; } abstract contract HopeLike { function hope(address) public virtual; function nope(address) public virtual; } abstract contract ProxyRegistryInterface { function build(address) public virtual returns (address); } abstract contract EndLike { function fix(bytes32) public virtual view returns (uint256); function cash(bytes32, uint256) public virtual; function free(bytes32) public virtual; function pack(uint256) public virtual; function skim(bytes32, address) public virtual; } abstract contract JugLike { function drip(bytes32) public virtual returns (uint256); } abstract contract PotLike { function pie(address) public virtual view returns (uint256); function drip() public virtual returns (uint256); function join(uint256) public virtual; function exit(uint256) public virtual; } abstract contract ProxyRegistryLike { function proxies(address) public virtual view returns (address); function build(address) public virtual returns (address); } abstract contract ProxyLike { function owner() public virtual view returns (address); } contract Common { uint256 constant RAY = 10**27; // Internal functions function mul(uint256 x, uint256 y) internal pure returns (uint256 z) { require(y == 0 || (z = x * y) / y == x, "mul-overflow"); } // Public functions // solhint-disable-next-line func-name-mixedcase function daiJoin_join(address apt, address urn, uint256 wad) public { // Gets DAI from the user's wallet DaiJoinLike(apt).dai().transferFrom(msg.sender, address(this), wad); // Approves adapter to take the DAI amount DaiJoinLike(apt).dai().approve(apt, wad); // Joins DAI into the vat DaiJoinLike(apt).join(urn, wad); } } contract MCDCreateProxyActions is Common { // Internal functions function sub(uint256 x, uint256 y) internal pure returns (uint256 z) { require((z = x - y) <= x, "sub-overflow"); } function toInt(uint256 x) internal pure returns (int256 y) { y = int256(x); require(y >= 0, "int-overflow"); } function toRad(uint256 wad) internal pure returns (uint256 rad) { rad = mul(wad, 10**27); } function convertTo18(address gemJoin, uint256 amt) internal returns (uint256 wad) { // For those collaterals that have less than 18 decimals precision we need to do the conversion before passing to frob function // Adapters will automatically handle the difference of precision wad = mul(amt, 10**(18 - GemJoinLike(gemJoin).dec())); } function _getDrawDart(address vat, address jug, address urn, bytes32 ilk, uint256 wad) internal returns (int256 dart) { // Updates stability fee rate uint256 rate = JugLike(jug).drip(ilk); // Gets DAI balance of the urn in the vat uint256 dai = VatLike(vat).dai(urn); // If there was already enough DAI in the vat balance, just exits it without adding more debt if (dai < mul(wad, RAY)) { // Calculates the needed dart so together with the existing dai in the vat is enough to exit wad amount of DAI tokens dart = toInt(sub(mul(wad, RAY), dai) / rate); // This is neeeded due lack of precision. It might need to sum an extra dart wei (for the given DAI wad amount) dart = mul(uint256(dart), rate) < mul(wad, RAY) ? dart + 1 : dart; } } function _getWipeDart(address vat, uint256 dai, address urn, bytes32 ilk) internal view returns (int256 dart) { // Gets actual rate from the vat (, uint256 rate, , , ) = VatLike(vat).ilks(ilk); // Gets actual art value of the urn (, uint256 art) = VatLike(vat).urns(ilk, urn); // Uses the whole dai balance in the vat to reduce the debt dart = toInt(dai / rate); // Checks the calculated dart is not higher than urn.art (total debt), otherwise uses its value dart = uint256(dart) <= art ? -dart : -toInt(art); } function _getWipeAllWad(address vat, address usr, address urn, bytes32 ilk) internal view returns (uint256 wad) { // Gets actual rate from the vat (, uint256 rate, , , ) = VatLike(vat).ilks(ilk); // Gets actual art value of the urn (, uint256 art) = VatLike(vat).urns(ilk, urn); // Gets actual dai amount in the urn uint256 dai = VatLike(vat).dai(usr); uint256 rad = sub(mul(art, rate), dai); wad = rad / RAY; // If the rad precision has some dust, it will need to request for 1 extra wad wei wad = mul(wad, RAY) < rad ? wad + 1 : wad; } // Public functions function transfer(address gem, address dst, uint256 wad) public { GemLike(gem).transfer(dst, wad); } // solhint-disable-next-line func-name-mixedcase function ethJoin_join(address apt, address urn) public payable { // Wraps ETH in WETH GemJoinLike(apt).gem().deposit{value: msg.value}(); // Approves adapter to take the WETH amount GemJoinLike(apt).gem().approve(address(apt), msg.value); // Joins WETH collateral into the vat GemJoinLike(apt).join(urn, msg.value); } // solhint-disable-next-line func-name-mixedcase function gemJoin_join(address apt, address urn, uint256 wad, bool transferFrom) public { // Only executes for tokens that have approval/transferFrom implementation if (transferFrom) { // Gets token from the user's wallet GemJoinLike(apt).gem().transferFrom(msg.sender, address(this), wad); // Approves adapter to take the token amount GemJoinLike(apt).gem().approve(apt, 0); GemJoinLike(apt).gem().approve(apt, wad); } // Joins token collateral into the vat GemJoinLike(apt).join(urn, wad); } function hope(address obj, address usr) public { HopeLike(obj).hope(usr); } function nope(address obj, address usr) public { HopeLike(obj).nope(usr); } function open(address manager, bytes32 ilk, address usr) public returns (uint256 cdp) { cdp = ManagerLike(manager).open(ilk, usr); } function give(address manager, uint256 cdp, address usr) public { ManagerLike(manager).give(cdp, usr); } function move(address manager, uint256 cdp, address dst, uint256 rad) public { ManagerLike(manager).move(cdp, dst, rad); } function frob(address manager, uint256 cdp, int256 dink, int256 dart) public { ManagerLike(manager).frob(cdp, dink, dart); } function lockETH(address manager, address ethJoin, uint256 cdp) public payable { // Receives ETH amount, converts it to WETH and joins it into the vat ethJoin_join(ethJoin, address(this)); // Locks WETH amount into the CDP VatLike(ManagerLike(manager).vat()).frob( ManagerLike(manager).ilks(cdp), ManagerLike(manager).urns(cdp), address(this), address(this), toInt(msg.value), 0 ); } function lockGem(address manager, address gemJoin, uint256 cdp, uint256 wad, bool transferFrom) public { // Takes token amount from user's wallet and joins into the vat gemJoin_join(gemJoin, address(this), wad, transferFrom); // Locks token amount into the CDP VatLike(ManagerLike(manager).vat()).frob( ManagerLike(manager).ilks(cdp), ManagerLike(manager).urns(cdp), address(this), address(this), toInt(convertTo18(gemJoin, wad)), 0 ); } function draw(address manager, address jug, address daiJoin, uint256 cdp, uint256 wad) public { address urn = ManagerLike(manager).urns(cdp); address vat = ManagerLike(manager).vat(); bytes32 ilk = ManagerLike(manager).ilks(cdp); // Generates debt in the CDP frob(manager, cdp, 0, _getDrawDart(vat, jug, urn, ilk, wad)); // Moves the DAI amount (balance in the vat in rad) to proxy's address move(manager, cdp, address(this), toRad(wad)); // Allows adapter to access to proxy's DAI balance in the vat if (VatLike(vat).can(address(this), address(daiJoin)) == 0) { VatLike(vat).hope(daiJoin); } // Exits DAI to the user's wallet as a token DaiJoinLike(daiJoin).exit(msg.sender, wad); } function lockETHAndDraw( address manager, address jug, address ethJoin, address daiJoin, uint256 cdp, uint256 wadD ) public payable { address urn = ManagerLike(manager).urns(cdp); address vat = ManagerLike(manager).vat(); bytes32 ilk = ManagerLike(manager).ilks(cdp); // Receives ETH amount, converts it to WETH and joins it into the vat ethJoin_join(ethJoin, urn); // Locks WETH amount into the CDP and generates debt frob(manager, cdp, toInt(msg.value), _getDrawDart(vat, jug, urn, ilk, wadD)); // Moves the DAI amount (balance in the vat in rad) to proxy's address move(manager, cdp, address(this), toRad(wadD)); // Allows adapter to access to proxy's DAI balance in the vat if (VatLike(vat).can(address(this), address(daiJoin)) == 0) { VatLike(vat).hope(daiJoin); } // Exits DAI to the user's wallet as a token DaiJoinLike(daiJoin).exit(msg.sender, wadD); } function openLockETHAndDraw( address manager, address jug, address ethJoin, address daiJoin, bytes32 ilk, uint256 wadD, address owner ) public payable returns (uint256 cdp) { cdp = open(manager, ilk, address(this)); lockETHAndDraw(manager, jug, ethJoin, daiJoin, cdp, wadD); give(manager, cdp, owner); } function lockGemAndDraw( address manager, address jug, address gemJoin, address daiJoin, uint256 cdp, uint256 wadC, uint256 wadD, bool transferFrom ) public { address urn = ManagerLike(manager).urns(cdp); address vat = ManagerLike(manager).vat(); bytes32 ilk = ManagerLike(manager).ilks(cdp); // Takes token amount from user's wallet and joins into the vat gemJoin_join(gemJoin, urn, wadC, transferFrom); // Locks token amount into the CDP and generates debt frob( manager, cdp, toInt(convertTo18(gemJoin, wadC)), _getDrawDart(vat, jug, urn, ilk, wadD) ); // Moves the DAI amount (balance in the vat in rad) to proxy's address move(manager, cdp, address(this), toRad(wadD)); // Allows adapter to access to proxy's DAI balance in the vat if (VatLike(vat).can(address(this), address(daiJoin)) == 0) { VatLike(vat).hope(daiJoin); } // Exits DAI to the user's wallet as a token DaiJoinLike(daiJoin).exit(msg.sender, wadD); } function openLockGemAndDraw( address manager, address jug, address gemJoin, address daiJoin, bytes32 ilk, uint256 wadC, uint256 wadD, bool transferFrom, address owner ) public returns (uint256 cdp) { cdp = open(manager, ilk, address(this)); lockGemAndDraw(manager, jug, gemJoin, daiJoin, cdp, wadC, wadD, transferFrom); give(manager, cdp, owner); } } contract MCDCreateTaker { using SafeERC20 for ERC20; address payable public constant MCD_CREATE_FLASH_LOAN = 0x71eC9a4fCE561c3936a511D9ebb05B60CF2bA519; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; address public constant ETH_JOIN_ADDRESS = 0x2F0b23f53734252Bda2277357e97e1517d6B042A; ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); // solhint-disable-next-line const-name-snakecase Manager public constant manager = Manager(0x5ef30b9986345249bc32d8928B7ee64DE9435E39); // solhint-disable-next-line const-name-snakecase DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); struct CreateData { uint collAmount; uint daiAmount; address joinAddr; } function openWithLoan( SaverExchangeCore.ExchangeData memory _exchangeData, CreateData memory _createData ) public payable { MCD_CREATE_FLASH_LOAN.transfer(msg.value); //0x fee if (_createData.joinAddr != ETH_JOIN_ADDRESS) { ERC20(getCollateralAddr(_createData.joinAddr)).safeTransferFrom(msg.sender, address(this), _createData.collAmount); ERC20(getCollateralAddr(_createData.joinAddr)).safeTransfer(MCD_CREATE_FLASH_LOAN, _createData.collAmount); } (uint[6] memory numData, address[5] memory addrData, bytes memory callData) = _packData(_createData, _exchangeData); bytes memory paramsData = abi.encode(numData, addrData, callData, address(this)); lendingPool.flashLoan(MCD_CREATE_FLASH_LOAN, DAI_ADDRESS, _createData.daiAmount, paramsData); logger.Log(address(this), msg.sender, "MCDCreate", abi.encode(manager.last(address(this)), _createData.collAmount, _createData.daiAmount)); } function getCollateralAddr(address _joinAddr) internal view returns (address) { return address(Join(_joinAddr).gem()); } function _packData( CreateData memory _createData, SaverExchangeCore.ExchangeData memory exchangeData ) internal pure returns (uint[6] memory numData, address[5] memory addrData, bytes memory callData) { numData = [ _createData.collAmount, _createData.daiAmount, exchangeData.srcAmount, exchangeData.destAmount, exchangeData.minPrice, exchangeData.price0x ]; addrData = [ exchangeData.srcAddr, exchangeData.destAddr, exchangeData.exchangeAddr, exchangeData.wrapper, _createData.joinAddr ]; callData = exchangeData.callData; } } abstract contract GemLike { function approve(address, uint) virtual public; function transfer(address, uint) virtual public; function transferFrom(address, address, uint) virtual public; function deposit() virtual public payable; function withdraw(uint) virtual public; } abstract contract ManagerLike { function cdpCan(address, uint, address) virtual public view returns (uint); function ilks(uint) virtual public view returns (bytes32); function owns(uint) virtual public view returns (address); function urns(uint) virtual public view returns (address); function vat() virtual public view returns (address); function open(bytes32, address) virtual public returns (uint); function give(uint, address) virtual public; function cdpAllow(uint, address, uint) virtual public; function urnAllow(address, uint) virtual public; function frob(uint, int, int) virtual public; function flux(uint, address, uint) virtual public; function move(uint, address, uint) virtual public; function exit(address, uint, address, uint) virtual public; function quit(uint, address) virtual public; function enter(address, uint) virtual public; function shift(uint, uint) virtual public; } abstract contract VatLike { function can(address, address) virtual public view returns (uint); function ilks(bytes32) virtual public view returns (uint, uint, uint, uint, uint); function dai(address) virtual public view returns (uint); function urns(bytes32, address) virtual public view returns (uint, uint); function frob(bytes32, address, address, address, int, int) virtual public; function hope(address) virtual public; function move(address, address, uint) virtual public; } abstract contract GemJoinLike { function dec() virtual public returns (uint); function gem() virtual public returns (GemLike); function join(address, uint) virtual public payable; function exit(address, uint) virtual public; } abstract contract GNTJoinLike { function bags(address) virtual public view returns (address); function make(address) virtual public returns (address); } abstract contract DaiJoinLike { function vat() virtual public returns (VatLike); function dai() virtual public returns (GemLike); function join(address, uint) virtual public payable; function exit(address, uint) virtual public; } abstract contract HopeLike { function hope(address) virtual public; function nope(address) virtual public; } abstract contract ProxyRegistryInterface { function proxies(address _owner) virtual public view returns (address); function build(address) virtual public returns (address); } abstract contract EndLike { function fix(bytes32) virtual public view returns (uint); function cash(bytes32, uint) virtual public; function free(bytes32) virtual public; function pack(uint) virtual public; function skim(bytes32, address) virtual public; } abstract contract JugLike { function drip(bytes32) virtual public returns (uint); } abstract contract PotLike { function pie(address) virtual public view returns (uint); function drip() virtual public returns (uint); function join(uint) virtual public; function exit(uint) virtual public; } abstract contract ProxyRegistryLike { function proxies(address) virtual public view returns (address); function build(address) virtual public returns (address); } abstract contract ProxyLike { function owner() virtual public view returns (address); } abstract contract DSProxy { function execute(address _target, bytes memory _data) virtual public payable returns (bytes32); function setOwner(address owner_) virtual public; } contract Common { uint256 constant RAY = 10 ** 27; // Internal functions function mul(uint x, uint y) internal pure returns (uint z) { require(y == 0 || (z = x * y) / y == x, "mul-overflow"); } // Public functions function daiJoin_join(address apt, address urn, uint wad) public { // Gets DAI from the user's wallet DaiJoinLike(apt).dai().transferFrom(msg.sender, address(this), wad); // Approves adapter to take the DAI amount DaiJoinLike(apt).dai().approve(apt, wad); // Joins DAI into the vat DaiJoinLike(apt).join(urn, wad); } } contract SaverProxyActions is Common { event CDPAction(string indexed, uint indexed, uint, uint); // Internal functions function sub(uint x, uint y) internal pure returns (uint z) { require((z = x - y) <= x, "sub-overflow"); } function toInt(uint x) internal pure returns (int y) { y = int(x); require(y >= 0, "int-overflow"); } function toRad(uint wad) internal pure returns (uint rad) { rad = mul(wad, 10 ** 27); } function convertTo18(address gemJoin, uint256 amt) internal returns (uint256 wad) { // For those collaterals that have less than 18 decimals precision we need to do the conversion before passing to frob function // Adapters will automatically handle the difference of precision wad = mul( amt, 10 ** (18 - GemJoinLike(gemJoin).dec()) ); } function _getDrawDart( address vat, address jug, address urn, bytes32 ilk, uint wad ) internal returns (int dart) { // Updates stability fee rate uint rate = JugLike(jug).drip(ilk); // Gets DAI balance of the urn in the vat uint dai = VatLike(vat).dai(urn); // If there was already enough DAI in the vat balance, just exits it without adding more debt if (dai < mul(wad, RAY)) { // Calculates the needed dart so together with the existing dai in the vat is enough to exit wad amount of DAI tokens dart = toInt(sub(mul(wad, RAY), dai) / rate); // This is neeeded due lack of precision. It might need to sum an extra dart wei (for the given DAI wad amount) dart = mul(uint(dart), rate) < mul(wad, RAY) ? dart + 1 : dart; } } function _getWipeDart( address vat, uint dai, address urn, bytes32 ilk ) internal view returns (int dart) { // Gets actual rate from the vat (, uint rate,,,) = VatLike(vat).ilks(ilk); // Gets actual art value of the urn (, uint art) = VatLike(vat).urns(ilk, urn); // Uses the whole dai balance in the vat to reduce the debt dart = toInt(dai / rate); // Checks the calculated dart is not higher than urn.art (total debt), otherwise uses its value dart = uint(dart) <= art ? - dart : - toInt(art); } function _getWipeAllWad( address vat, address usr, address urn, bytes32 ilk ) internal view returns (uint wad) { // Gets actual rate from the vat (, uint rate,,,) = VatLike(vat).ilks(ilk); // Gets actual art value of the urn (, uint art) = VatLike(vat).urns(ilk, urn); // Gets actual dai amount in the urn uint dai = VatLike(vat).dai(usr); uint rad = sub(mul(art, rate), dai); wad = rad / RAY; // If the rad precision has some dust, it will need to request for 1 extra wad wei wad = mul(wad, RAY) < rad ? wad + 1 : wad; } // Public functions function transfer(address gem, address dst, uint wad) public { GemLike(gem).transfer(dst, wad); } function ethJoin_join(address apt, address urn) public payable { // Wraps ETH in WETH GemJoinLike(apt).gem().deposit{value: msg.value}(); // Approves adapter to take the WETH amount GemJoinLike(apt).gem().approve(address(apt), msg.value); // Joins WETH collateral into the vat GemJoinLike(apt).join(urn, msg.value); } function gemJoin_join(address apt, address urn, uint wad, bool transferFrom) public { // Only executes for tokens that have approval/transferFrom implementation if (transferFrom) { // Gets token from the user's wallet GemJoinLike(apt).gem().transferFrom(msg.sender, address(this), wad); // Approves adapter to take the token amount GemJoinLike(apt).gem().approve(apt, 0); GemJoinLike(apt).gem().approve(apt, wad); } // Joins token collateral into the vat GemJoinLike(apt).join(urn, wad); } function hope( address obj, address usr ) public { HopeLike(obj).hope(usr); } function nope( address obj, address usr ) public { HopeLike(obj).nope(usr); } function open( address manager, bytes32 ilk, address usr ) public returns (uint cdp) { cdp = ManagerLike(manager).open(ilk, usr); } function give( address manager, uint cdp, address usr ) public { ManagerLike(manager).give(cdp, usr); emit CDPAction('give', cdp, 0, 0); } function giveToProxy( address proxyRegistry, address manager, uint cdp, address dst ) public { // Gets actual proxy address address proxy = ProxyRegistryLike(proxyRegistry).proxies(dst); // Checks if the proxy address already existed and dst address is still the owner if (proxy == address(0) || ProxyLike(proxy).owner() != dst) { uint csize; assembly { csize := extcodesize(dst) } // We want to avoid creating a proxy for a contract address that might not be able to handle proxies, then losing the CDP require(csize == 0, "Dst-is-a-contract"); // Creates the proxy for the dst address proxy = ProxyRegistryLike(proxyRegistry).build(dst); } // Transfers CDP to the dst proxy give(manager, cdp, proxy); } function cdpAllow( address manager, uint cdp, address usr, uint ok ) public { ManagerLike(manager).cdpAllow(cdp, usr, ok); } function urnAllow( address manager, address usr, uint ok ) public { ManagerLike(manager).urnAllow(usr, ok); } function flux( address manager, uint cdp, address dst, uint wad ) public { ManagerLike(manager).flux(cdp, dst, wad); } function move( address manager, uint cdp, address dst, uint rad ) public { ManagerLike(manager).move(cdp, dst, rad); } function frob( address manager, uint cdp, int dink, int dart ) public { ManagerLike(manager).frob(cdp, dink, dart); } function quit( address manager, uint cdp, address dst ) public { ManagerLike(manager).quit(cdp, dst); } function enter( address manager, address src, uint cdp ) public { ManagerLike(manager).enter(src, cdp); } function shift( address manager, uint cdpSrc, uint cdpOrg ) public { ManagerLike(manager).shift(cdpSrc, cdpOrg); } function makeGemBag( address gemJoin ) public returns (address bag) { bag = GNTJoinLike(gemJoin).make(address(this)); } function lockETH( address manager, address ethJoin, uint cdp ) public payable { // Receives ETH amount, converts it to WETH and joins it into the vat ethJoin_join(ethJoin, address(this)); // Locks WETH amount into the CDP VatLike(ManagerLike(manager).vat()).frob( ManagerLike(manager).ilks(cdp), ManagerLike(manager).urns(cdp), address(this), address(this), toInt(msg.value), 0 ); emit CDPAction('lockETH', cdp, msg.value, 0); } function lockGem( address manager, address gemJoin, uint cdp, uint wad, bool transferFrom ) public { // Takes token amount from user's wallet and joins into the vat gemJoin_join(gemJoin, address(this), wad, transferFrom); // Locks token amount into the CDP VatLike(ManagerLike(manager).vat()).frob( ManagerLike(manager).ilks(cdp), ManagerLike(manager).urns(cdp), address(this), address(this), toInt(convertTo18(gemJoin, wad)), 0 ); emit CDPAction('lockGem', cdp, wad, 0); } function freeETH( address manager, address ethJoin, uint cdp, uint wad ) public { // Unlocks WETH amount from the CDP frob(manager, cdp, -toInt(wad), 0); // Moves the amount from the CDP urn to proxy's address flux(manager, cdp, address(this), wad); // Exits WETH amount to proxy address as a token GemJoinLike(ethJoin).exit(address(this), wad); // Converts WETH to ETH GemJoinLike(ethJoin).gem().withdraw(wad); // Sends ETH back to the user's wallet msg.sender.transfer(wad); emit CDPAction('freeETH', cdp, wad, 0); } function freeGem( address manager, address gemJoin, uint cdp, uint wad ) public { uint wad18 = convertTo18(gemJoin, wad); // Unlocks token amount from the CDP frob(manager, cdp, -toInt(wad18), 0); // Moves the amount from the CDP urn to proxy's address flux(manager, cdp, address(this), wad18); // Exits token amount to the user's wallet as a token GemJoinLike(gemJoin).exit(msg.sender, wad); emit CDPAction('freeGem', cdp, wad, 0); } function exitETH( address manager, address ethJoin, uint cdp, uint wad ) public { // Moves the amount from the CDP urn to proxy's address flux(manager, cdp, address(this), wad); // Exits WETH amount to proxy address as a token GemJoinLike(ethJoin).exit(address(this), wad); // Converts WETH to ETH GemJoinLike(ethJoin).gem().withdraw(wad); // Sends ETH back to the user's wallet msg.sender.transfer(wad); } function exitGem( address manager, address gemJoin, uint cdp, uint wad ) public { // Moves the amount from the CDP urn to proxy's address flux(manager, cdp, address(this), convertTo18(gemJoin, wad)); // Exits token amount to the user's wallet as a token GemJoinLike(gemJoin).exit(msg.sender, wad); } function draw( address manager, address jug, address daiJoin, uint cdp, uint wad ) public { address urn = ManagerLike(manager).urns(cdp); address vat = ManagerLike(manager).vat(); bytes32 ilk = ManagerLike(manager).ilks(cdp); // Generates debt in the CDP frob(manager, cdp, 0, _getDrawDart(vat, jug, urn, ilk, wad)); // Moves the DAI amount (balance in the vat in rad) to proxy's address move(manager, cdp, address(this), toRad(wad)); // Allows adapter to access to proxy's DAI balance in the vat if (VatLike(vat).can(address(this), address(daiJoin)) == 0) { VatLike(vat).hope(daiJoin); } // Exits DAI to the user's wallet as a token DaiJoinLike(daiJoin).exit(msg.sender, wad); emit CDPAction('draw', cdp, 0, wad); } function wipe( address manager, address daiJoin, uint cdp, uint wad ) public { address vat = ManagerLike(manager).vat(); address urn = ManagerLike(manager).urns(cdp); bytes32 ilk = ManagerLike(manager).ilks(cdp); address own = ManagerLike(manager).owns(cdp); if (own == address(this) || ManagerLike(manager).cdpCan(own, cdp, address(this)) == 1) { // Joins DAI amount into the vat daiJoin_join(daiJoin, urn, wad); // Paybacks debt to the CDP frob(manager, cdp, 0, _getWipeDart(vat, VatLike(vat).dai(urn), urn, ilk)); } else { // Joins DAI amount into the vat daiJoin_join(daiJoin, address(this), wad); // Paybacks debt to the CDP VatLike(vat).frob( ilk, urn, address(this), address(this), 0, _getWipeDart(vat, wad * RAY, urn, ilk) ); } emit CDPAction('wipe', cdp, 0, wad); } function wipeAll( address manager, address daiJoin, uint cdp ) public { address vat = ManagerLike(manager).vat(); address urn = ManagerLike(manager).urns(cdp); bytes32 ilk = ManagerLike(manager).ilks(cdp); (, uint art) = VatLike(vat).urns(ilk, urn); address own = ManagerLike(manager).owns(cdp); if (own == address(this) || ManagerLike(manager).cdpCan(own, cdp, address(this)) == 1) { // Joins DAI amount into the vat daiJoin_join(daiJoin, urn, _getWipeAllWad(vat, urn, urn, ilk)); // Paybacks debt to the CDP frob(manager, cdp, 0, -int(art)); } else { // Joins DAI amount into the vat daiJoin_join(daiJoin, address(this), _getWipeAllWad(vat, address(this), urn, ilk)); // Paybacks debt to the CDP VatLike(vat).frob( ilk, urn, address(this), address(this), 0, -int(art) ); } emit CDPAction('wipeAll', cdp, 0, art); } function lockETHAndDraw( address manager, address jug, address ethJoin, address daiJoin, uint cdp, uint wadD ) public payable { address urn = ManagerLike(manager).urns(cdp); address vat = ManagerLike(manager).vat(); bytes32 ilk = ManagerLike(manager).ilks(cdp); // Receives ETH amount, converts it to WETH and joins it into the vat ethJoin_join(ethJoin, urn); // Locks WETH amount into the CDP and generates debt frob(manager, cdp, toInt(msg.value), _getDrawDart(vat, jug, urn, ilk, wadD)); // Moves the DAI amount (balance in the vat in rad) to proxy's address move(manager, cdp, address(this), toRad(wadD)); // Allows adapter to access to proxy's DAI balance in the vat if (VatLike(vat).can(address(this), address(daiJoin)) == 0) { VatLike(vat).hope(daiJoin); } // Exits DAI to the user's wallet as a token DaiJoinLike(daiJoin).exit(msg.sender, wadD); } function openLockETHAndDraw( address manager, address jug, address ethJoin, address daiJoin, bytes32 ilk, uint wadD ) public payable returns (uint cdp) { cdp = open(manager, ilk, address(this)); lockETHAndDraw(manager, jug, ethJoin, daiJoin, cdp, wadD); emit CDPAction('openLockETHAndDraw', cdp, msg.value, wadD); } function lockGemAndDraw( address manager, address jug, address gemJoin, address daiJoin, uint cdp, uint wadC, uint wadD, bool transferFrom ) public { address urn = ManagerLike(manager).urns(cdp); address vat = ManagerLike(manager).vat(); bytes32 ilk = ManagerLike(manager).ilks(cdp); // Takes token amount from user's wallet and joins into the vat gemJoin_join(gemJoin, urn, wadC, transferFrom); // Locks token amount into the CDP and generates debt frob(manager, cdp, toInt(convertTo18(gemJoin, wadC)), _getDrawDart(vat, jug, urn, ilk, wadD)); // Moves the DAI amount (balance in the vat in rad) to proxy's address move(manager, cdp, address(this), toRad(wadD)); // Allows adapter to access to proxy's DAI balance in the vat if (VatLike(vat).can(address(this), address(daiJoin)) == 0) { VatLike(vat).hope(daiJoin); } // Exits DAI to the user's wallet as a token DaiJoinLike(daiJoin).exit(msg.sender, wadD); } function openLockGemAndDraw( address manager, address jug, address gemJoin, address daiJoin, bytes32 ilk, uint wadC, uint wadD, bool transferFrom ) public returns (uint cdp) { cdp = open(manager, ilk, address(this)); lockGemAndDraw(manager, jug, gemJoin, daiJoin, cdp, wadC, wadD, transferFrom); emit CDPAction('openLockGemAndDraw', cdp, wadC, wadD); } function wipeAllAndFreeETH( address manager, address ethJoin, address daiJoin, uint cdp, uint wadC ) public { address vat = ManagerLike(manager).vat(); address urn = ManagerLike(manager).urns(cdp); bytes32 ilk = ManagerLike(manager).ilks(cdp); (, uint art) = VatLike(vat).urns(ilk, urn); // Joins DAI amount into the vat daiJoin_join(daiJoin, urn, _getWipeAllWad(vat, urn, urn, ilk)); // Paybacks debt to the CDP and unlocks WETH amount from it frob( manager, cdp, -toInt(wadC), -int(art) ); // Moves the amount from the CDP urn to proxy's address flux(manager, cdp, address(this), wadC); // Exits WETH amount to proxy address as a token GemJoinLike(ethJoin).exit(address(this), wadC); // Converts WETH to ETH GemJoinLike(ethJoin).gem().withdraw(wadC); // Sends ETH back to the user's wallet msg.sender.transfer(wadC); emit CDPAction('wipeAllAndFreeETH', cdp, wadC, art); } function wipeAndFreeGem( address manager, address gemJoin, address daiJoin, uint cdp, uint wadC, uint wadD ) public { address urn = ManagerLike(manager).urns(cdp); // Joins DAI amount into the vat daiJoin_join(daiJoin, urn, wadD); uint wad18 = convertTo18(gemJoin, wadC); // Paybacks debt to the CDP and unlocks token amount from it frob( manager, cdp, -toInt(wad18), _getWipeDart(ManagerLike(manager).vat(), VatLike(ManagerLike(manager).vat()).dai(urn), urn, ManagerLike(manager).ilks(cdp)) ); // Moves the amount from the CDP urn to proxy's address flux(manager, cdp, address(this), wad18); // Exits token amount to the user's wallet as a token GemJoinLike(gemJoin).exit(msg.sender, wadC); } function wipeAllAndFreeGem( address manager, address gemJoin, address daiJoin, uint cdp, uint wadC ) public { address vat = ManagerLike(manager).vat(); address urn = ManagerLike(manager).urns(cdp); bytes32 ilk = ManagerLike(manager).ilks(cdp); (, uint art) = VatLike(vat).urns(ilk, urn); // Joins DAI amount into the vat daiJoin_join(daiJoin, urn, _getWipeAllWad(vat, urn, urn, ilk)); uint wad18 = convertTo18(gemJoin, wadC); // Paybacks debt to the CDP and unlocks token amount from it frob( manager, cdp, -toInt(wad18), -int(art) ); // Moves the amount from the CDP urn to proxy's address flux(manager, cdp, address(this), wad18); // Exits token amount to the user's wallet as a token GemJoinLike(gemJoin).exit(msg.sender, wadC); emit CDPAction('wipeAllAndFreeGem', cdp, wadC, art); } function createProxyAndCDP( address manager, address jug, address ethJoin, address daiJoin, bytes32 ilk, uint wadD, address registry ) public payable returns(uint) { address proxy = ProxyRegistryInterface(registry).build(msg.sender); uint cdp = openLockETHAndDraw(manager, jug, ethJoin, daiJoin, ilk, wadD ); give(manager, cdp, address(proxy)); return cdp; } function createProxyAndGemCDP( address manager, address jug, address gemJoin, address daiJoin, bytes32 ilk, uint wadC, uint wadD, bool transferFrom, address registry ) public returns(uint) { address proxy = ProxyRegistryInterface(registry).build(msg.sender); uint cdp = openLockGemAndDraw(manager, jug, gemJoin, daiJoin, ilk, wadC, wadD, transferFrom); give(manager, cdp, address(proxy)); return cdp; } } contract MCDSaverProxyHelper is DSMath { /// @notice Returns a normalized debt _amount based on the current rate /// @param _amount Amount of dai to be normalized /// @param _rate Current rate of the stability fee /// @param _daiVatBalance Balance od Dai in the Vat for that CDP function normalizeDrawAmount(uint _amount, uint _rate, uint _daiVatBalance) internal pure returns (int dart) { if (_daiVatBalance < mul(_amount, RAY)) { dart = toPositiveInt(sub(mul(_amount, RAY), _daiVatBalance) / _rate); dart = mul(uint(dart), _rate) < mul(_amount, RAY) ? dart + 1 : dart; } } /// @notice Converts a number to Rad percision /// @param _wad The input number in wad percision function toRad(uint _wad) internal pure returns (uint) { return mul(_wad, 10 ** 27); } /// @notice Converts a number to 18 decimal percision /// @param _joinAddr Join address of the collateral /// @param _amount Number to be converted function convertTo18(address _joinAddr, uint256 _amount) internal view returns (uint256) { return mul(_amount, 10 ** (18 - Join(_joinAddr).dec())); } /// @notice Converts a uint to int and checks if positive /// @param _x Number to be converted function toPositiveInt(uint _x) internal pure returns (int y) { y = int(_x); require(y >= 0, "int-overflow"); } /// @notice Gets Dai amount in Vat which can be added to Cdp /// @param _vat Address of Vat contract /// @param _urn Urn of the Cdp /// @param _ilk Ilk of the Cdp function normalizePaybackAmount(address _vat, address _urn, bytes32 _ilk) internal view returns (int amount) { uint dai = Vat(_vat).dai(_urn); (, uint rate,,,) = Vat(_vat).ilks(_ilk); (, uint art) = Vat(_vat).urns(_ilk, _urn); amount = toPositiveInt(dai / rate); amount = uint(amount) <= art ? - amount : - toPositiveInt(art); } /// @notice Gets the whole debt of the CDP /// @param _vat Address of Vat contract /// @param _usr Address of the Dai holder /// @param _urn Urn of the Cdp /// @param _ilk Ilk of the Cdp function getAllDebt(address _vat, address _usr, address _urn, bytes32 _ilk) internal view returns (uint daiAmount) { (, uint rate,,,) = Vat(_vat).ilks(_ilk); (, uint art) = Vat(_vat).urns(_ilk, _urn); uint dai = Vat(_vat).dai(_usr); uint rad = sub(mul(art, rate), dai); daiAmount = rad / RAY; daiAmount = mul(daiAmount, RAY) < rad ? daiAmount + 1 : daiAmount; } /// @notice Gets the token address from the Join contract /// @param _joinAddr Address of the Join contract function getCollateralAddr(address _joinAddr) internal view returns (address) { return address(Join(_joinAddr).gem()); } /// @notice Gets CDP info (collateral, debt) /// @param _manager Manager contract /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP function getCdpInfo(Manager _manager, uint _cdpId, bytes32 _ilk) public view returns (uint, uint) { address vat = _manager.vat(); address urn = _manager.urns(_cdpId); (uint collateral, uint debt) = Vat(vat).urns(_ilk, urn); (,uint rate,,,) = Vat(vat).ilks(_ilk); return (collateral, rmul(debt, rate)); } /// @notice Address that owns the DSProxy that owns the CDP /// @param _manager Manager contract /// @param _cdpId Id of the CDP function getOwner(Manager _manager, uint _cdpId) public view returns (address) { DSProxy proxy = DSProxy(uint160(_manager.owns(_cdpId))); return proxy.owner(); } } abstract contract ILendingPool { function flashLoan( address payable _receiver, address _reserve, uint _amount, bytes calldata _params) external virtual; } abstract contract ProtocolInterface { function deposit(address _user, uint256 _amount) public virtual; function withdraw(address _user, uint256 _amount) public virtual; } contract SavingsLogger { event Deposit(address indexed sender, uint8 protocol, uint256 amount); event Withdraw(address indexed sender, uint8 protocol, uint256 amount); event Swap(address indexed sender, uint8 fromProtocol, uint8 toProtocol, uint256 amount); function logDeposit(address _sender, uint8 _protocol, uint256 _amount) external { emit Deposit(_sender, _protocol, _amount); } function logWithdraw(address _sender, uint8 _protocol, uint256 _amount) external { emit Withdraw(_sender, _protocol, _amount); } function logSwap(address _sender, uint8 _protocolFrom, uint8 _protocolTo, uint256 _amount) external { emit Swap(_sender, _protocolFrom, _protocolTo, _amount); } } contract AaveSavingsProtocol is ProtocolInterface, DSAuth { address public constant ADAI_ADDRESS = 0xfC1E690f61EFd961294b3e1Ce3313fBD8aa4f85d; address public constant AAVE_LENDING_POOL = 0x398eC7346DcD622eDc5ae82352F02bE94C62d119; address public constant AAVE_LENDING_POOL_CORE = 0x3dfd23A6c5E8BbcFc9581d2E864a68feb6a076d3; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; function deposit(address _user, uint _amount) public override { require(msg.sender == _user); // get dai from user require(ERC20(DAI_ADDRESS).transferFrom(_user, address(this), _amount)); ERC20(DAI_ADDRESS).approve(AAVE_LENDING_POOL_CORE, uint(-1)); ILendingPool(AAVE_LENDING_POOL).deposit(DAI_ADDRESS, _amount, 0); ERC20(ADAI_ADDRESS).transfer(_user, ERC20(ADAI_ADDRESS).balanceOf(address(this))); } function withdraw(address _user, uint _amount) public override { require(msg.sender == _user); require(ERC20(ADAI_ADDRESS).transferFrom(_user, address(this), _amount)); IAToken(ADAI_ADDRESS).redeem(_amount); // return dai we have to user ERC20(DAI_ADDRESS).transfer(_user, _amount); } } contract CompoundSavingsProtocol { address public constant NEW_CDAI_ADDRESS = 0x5d3a536E4D6DbD6114cc1Ead35777bAB948E3643; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; CTokenInterface public constant cDaiContract = CTokenInterface(NEW_CDAI_ADDRESS); function compDeposit(address _user, uint _amount) internal { // get dai from user require(ERC20(DAI_ADDRESS).transferFrom(_user, address(this), _amount)); // mainnet only ERC20(DAI_ADDRESS).approve(NEW_CDAI_ADDRESS, uint(-1)); // mint cDai require(cDaiContract.mint(_amount) == 0, "Failed Mint"); } function compWithdraw(address _user, uint _amount) internal { // transfer all users balance to this contract require(cDaiContract.transferFrom(_user, address(this), ERC20(NEW_CDAI_ADDRESS).balanceOf(_user))); // approve cDai to compound contract cDaiContract.approve(NEW_CDAI_ADDRESS, uint(-1)); // get dai from cDai contract require(cDaiContract.redeemUnderlying(_amount) == 0, "Reedem Failed"); // return to user balance we didn't spend uint cDaiBalance = cDaiContract.balanceOf(address(this)); if (cDaiBalance > 0) { cDaiContract.transfer(_user, cDaiBalance); } // return dai we have to user ERC20(DAI_ADDRESS).transfer(_user, _amount); } } abstract contract VatLike { function can(address, address) virtual public view returns (uint); function ilks(bytes32) virtual public view returns (uint, uint, uint, uint, uint); function dai(address) virtual public view returns (uint); function urns(bytes32, address) virtual public view returns (uint, uint); function frob(bytes32, address, address, address, int, int) virtual public; function hope(address) virtual public; function move(address, address, uint) virtual public; } abstract contract PotLike { function pie(address) virtual public view returns (uint); function drip() virtual public returns (uint); function join(uint) virtual public; function exit(uint) virtual public; } abstract contract GemLike { function approve(address, uint) virtual public; function transfer(address, uint) virtual public; function transferFrom(address, address, uint) virtual public; function deposit() virtual public payable; function withdraw(uint) virtual public; } abstract contract DaiJoinLike { function vat() virtual public returns (VatLike); function dai() virtual public returns (GemLike); function join(address, uint) virtual public payable; function exit(address, uint) virtual public; } contract DSRSavingsProtocol is DSMath { // Mainnet address public constant POT_ADDRESS = 0x197E90f9FAD81970bA7976f33CbD77088E5D7cf7; address public constant DAI_JOIN_ADDRESS = 0x9759A6Ac90977b93B58547b4A71c78317f391A28; function dsrDeposit(uint _amount, bool _fromUser) internal { VatLike vat = DaiJoinLike(DAI_JOIN_ADDRESS).vat(); uint chi = PotLike(POT_ADDRESS).drip(); daiJoin_join(DAI_JOIN_ADDRESS, address(this), _amount, _fromUser); if (vat.can(address(this), address(POT_ADDRESS)) == 0) { vat.hope(POT_ADDRESS); } PotLike(POT_ADDRESS).join(mul(_amount, RAY) / chi); } function dsrWithdraw(uint _amount, bool _toUser) internal { VatLike vat = DaiJoinLike(DAI_JOIN_ADDRESS).vat(); uint chi = PotLike(POT_ADDRESS).drip(); uint pie = mul(_amount, RAY) / chi; PotLike(POT_ADDRESS).exit(pie); uint balance = DaiJoinLike(DAI_JOIN_ADDRESS).vat().dai(address(this)); if (vat.can(address(this), address(DAI_JOIN_ADDRESS)) == 0) { vat.hope(DAI_JOIN_ADDRESS); } address to; if (_toUser) { to = msg.sender; } else { to = address(this); } if (_amount == uint(-1)) { DaiJoinLike(DAI_JOIN_ADDRESS).exit(to, mul(chi, pie) / RAY); } else { DaiJoinLike(DAI_JOIN_ADDRESS).exit( to, balance >= mul(_amount, RAY) ? _amount : balance / RAY ); } } function daiJoin_join(address apt, address urn, uint wad, bool _fromUser) internal { if (_fromUser) { DaiJoinLike(apt).dai().transferFrom(msg.sender, address(this), wad); } DaiJoinLike(apt).dai().approve(apt, wad); DaiJoinLike(apt).join(urn, wad); } } contract DydxSavingsProtocol is ProtocolInterface, DSAuth { address public constant SOLO_MARGIN_ADDRESS = 0x1E0447b19BB6EcFdAe1e4AE1694b0C3659614e4e; ISoloMargin public soloMargin; address public savingsProxy; uint daiMarketId = 3; constructor() public { soloMargin = ISoloMargin(SOLO_MARGIN_ADDRESS); } function addSavingsProxy(address _savingsProxy) public auth { savingsProxy = _savingsProxy; } function deposit(address _user, uint _amount) public override { require(msg.sender == _user); Account.Info[] memory accounts = new Account.Info[](1); accounts[0] = getAccount(_user, 0); Actions.ActionArgs[] memory actions = new Actions.ActionArgs[](1); Types.AssetAmount memory amount = Types.AssetAmount({ sign: true, denomination: Types.AssetDenomination.Wei, ref: Types.AssetReference.Delta, value: _amount }); actions[0] = Actions.ActionArgs({ actionType: Actions.ActionType.Deposit, accountId: 0, amount: amount, primaryMarketId: daiMarketId, otherAddress: _user, secondaryMarketId: 0, //not used otherAccountId: 0, //not used data: "" //not used }); soloMargin.operate(accounts, actions); } function withdraw(address _user, uint _amount) public override { require(msg.sender == _user); Account.Info[] memory accounts = new Account.Info[](1); accounts[0] = getAccount(_user, 0); Actions.ActionArgs[] memory actions = new Actions.ActionArgs[](1); Types.AssetAmount memory amount = Types.AssetAmount({ sign: false, denomination: Types.AssetDenomination.Wei, ref: Types.AssetReference.Delta, value: _amount }); actions[0] = Actions.ActionArgs({ actionType: Actions.ActionType.Withdraw, accountId: 0, amount: amount, primaryMarketId: daiMarketId, otherAddress: _user, secondaryMarketId: 0, //not used otherAccountId: 0, //not used data: "" //not used }); soloMargin.operate(accounts, actions); } function getWeiBalance(address _user, uint _index) public view returns(Types.Wei memory) { Types.Wei[] memory weiBalances; (,,weiBalances) = soloMargin.getAccountBalances(getAccount(_user, _index)); return weiBalances[daiMarketId]; } function getParBalance(address _user, uint _index) public view returns(Types.Par memory) { Types.Par[] memory parBalances; (,parBalances,) = soloMargin.getAccountBalances(getAccount(_user, _index)); return parBalances[daiMarketId]; } function getAccount(address _user, uint _index) public pure returns(Account.Info memory) { Account.Info memory account = Account.Info({ owner: _user, number: _index }); return account; } } abstract contract ISoloMargin { struct OperatorArg { address operator; bool trusted; } function operate( Account.Info[] memory accounts, Actions.ActionArgs[] memory actions ) public virtual; function getAccountBalances( Account.Info memory account ) public view virtual returns ( address[] memory, Types.Par[] memory, Types.Wei[] memory ); function setOperators( OperatorArg[] memory args ) public virtual; function getNumMarkets() public view virtual returns (uint256); function getMarketTokenAddress(uint256 marketId) public view virtual returns (address); } library Account { // ============ Enums ============ /* * Most-recently-cached account status. * * Normal: Can only be liquidated if the account values are violating the global margin-ratio. * Liquid: Can be liquidated no matter the account values. * Can be vaporized if there are no more positive account values. * Vapor: Has only negative (or zeroed) account values. Can be vaporized. * */ enum Status { Normal, Liquid, Vapor } // ============ Structs ============ // Represents the unique key that specifies an account struct Info { address owner; // The address that owns the account uint256 number; // A nonce that allows a single address to control many accounts } // The complete storage for any account struct Storage { mapping (uint256 => Types.Par) balances; // Mapping from marketId to principal Status status; } // ============ Library Functions ============ function equals( Info memory a, Info memory b ) internal pure returns (bool) { return a.owner == b.owner && a.number == b.number; } } library Actions { // ============ Constants ============ bytes32 constant FILE = "Actions"; // ============ Enums ============ enum ActionType { Deposit, // supply tokens Withdraw, // borrow tokens Transfer, // transfer balance between accounts Buy, // buy an amount of some token (externally) Sell, // sell an amount of some token (externally) Trade, // trade tokens against another account Liquidate, // liquidate an undercollateralized or expiring account Vaporize, // use excess tokens to zero-out a completely negative account Call // send arbitrary data to an address } enum AccountLayout { OnePrimary, TwoPrimary, PrimaryAndSecondary } enum MarketLayout { ZeroMarkets, OneMarket, TwoMarkets } // ============ Structs ============ /* * Arguments that are passed to Solo in an ordered list as part of a single operation. * Each ActionArgs has an actionType which specifies which action struct that this data will be * parsed into before being processed. */ struct ActionArgs { ActionType actionType; uint256 accountId; Types.AssetAmount amount; uint256 primaryMarketId; uint256 secondaryMarketId; address otherAddress; uint256 otherAccountId; bytes data; } // ============ Action Types ============ /* * Moves tokens from an address to Solo. Can either repay a borrow or provide additional supply. */ struct DepositArgs { Types.AssetAmount amount; Account.Info account; uint256 market; address from; } /* * Moves tokens from Solo to another address. Can either borrow tokens or reduce the amount * previously supplied. */ struct WithdrawArgs { Types.AssetAmount amount; Account.Info account; uint256 market; address to; } /* * Transfers balance between two accounts. The msg.sender must be an operator for both accounts. * The amount field applies to accountOne. * This action does not require any token movement since the trade is done internally to Solo. */ struct TransferArgs { Types.AssetAmount amount; Account.Info accountOne; Account.Info accountTwo; uint256 market; } /* * Acquires a certain amount of tokens by spending other tokens. Sends takerMarket tokens to the * specified exchangeWrapper contract and expects makerMarket tokens in return. The amount field * applies to the makerMarket. */ struct BuyArgs { Types.AssetAmount amount; Account.Info account; uint256 makerMarket; uint256 takerMarket; address exchangeWrapper; bytes orderData; } /* * Spends a certain amount of tokens to acquire other tokens. Sends takerMarket tokens to the * specified exchangeWrapper and expects makerMarket tokens in return. The amount field applies * to the takerMarket. */ struct SellArgs { Types.AssetAmount amount; Account.Info account; uint256 takerMarket; uint256 makerMarket; address exchangeWrapper; bytes orderData; } /* * Trades balances between two accounts using any external contract that implements the * AutoTrader interface. The AutoTrader contract must be an operator for the makerAccount (for * which it is trading on-behalf-of). The amount field applies to the makerAccount and the * inputMarket. This proposed change to the makerAccount is passed to the AutoTrader which will * quote a change for the makerAccount in the outputMarket (or will disallow the trade). * This action does not require any token movement since the trade is done internally to Solo. */ struct TradeArgs { Types.AssetAmount amount; Account.Info takerAccount; Account.Info makerAccount; uint256 inputMarket; uint256 outputMarket; address autoTrader; bytes tradeData; } /* * Each account must maintain a certain margin-ratio (specified globally). If the account falls * below this margin-ratio, it can be liquidated by any other account. This allows anyone else * (arbitrageurs) to repay any borrowed asset (owedMarket) of the liquidating account in * exchange for any collateral asset (heldMarket) of the liquidAccount. The ratio is determined * by the price ratio (given by the oracles) plus a spread (specified globally). Liquidating an * account also sets a flag on the account that the account is being liquidated. This allows * anyone to continue liquidating the account until there are no more borrows being taken by the * liquidating account. Liquidators do not have to liquidate the entire account all at once but * can liquidate as much as they choose. The liquidating flag allows liquidators to continue * liquidating the account even if it becomes collateralized through partial liquidation or * price movement. */ struct LiquidateArgs { Types.AssetAmount amount; Account.Info solidAccount; Account.Info liquidAccount; uint256 owedMarket; uint256 heldMarket; } /* * Similar to liquidate, but vaporAccounts are accounts that have only negative balances * remaining. The arbitrageur pays back the negative asset (owedMarket) of the vaporAccount in * exchange for a collateral asset (heldMarket) at a favorable spread. However, since the * liquidAccount has no collateral assets, the collateral must come from Solo's excess tokens. */ struct VaporizeArgs { Types.AssetAmount amount; Account.Info solidAccount; Account.Info vaporAccount; uint256 owedMarket; uint256 heldMarket; } /* * Passes arbitrary bytes of data to an external contract that implements the Callee interface. * Does not change any asset amounts. This function may be useful for setting certain variables * on layer-two contracts for certain accounts without having to make a separate Ethereum * transaction for doing so. Also, the second-layer contracts can ensure that the call is coming * from an operator of the particular account. */ struct CallArgs { Account.Info account; address callee; bytes data; } // ============ Helper Functions ============ function getMarketLayout( ActionType actionType ) internal pure returns (MarketLayout) { if ( actionType == Actions.ActionType.Deposit || actionType == Actions.ActionType.Withdraw || actionType == Actions.ActionType.Transfer ) { return MarketLayout.OneMarket; } else if (actionType == Actions.ActionType.Call) { return MarketLayout.ZeroMarkets; } return MarketLayout.TwoMarkets; } function getAccountLayout( ActionType actionType ) internal pure returns (AccountLayout) { if ( actionType == Actions.ActionType.Transfer || actionType == Actions.ActionType.Trade ) { return AccountLayout.TwoPrimary; } else if ( actionType == Actions.ActionType.Liquidate || actionType == Actions.ActionType.Vaporize ) { return AccountLayout.PrimaryAndSecondary; } return AccountLayout.OnePrimary; } // ============ Parsing Functions ============ function parseDepositArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (DepositArgs memory) { assert(args.actionType == ActionType.Deposit); return DepositArgs({ amount: args.amount, account: accounts[args.accountId], market: args.primaryMarketId, from: args.otherAddress }); } function parseWithdrawArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (WithdrawArgs memory) { assert(args.actionType == ActionType.Withdraw); return WithdrawArgs({ amount: args.amount, account: accounts[args.accountId], market: args.primaryMarketId, to: args.otherAddress }); } function parseTransferArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (TransferArgs memory) { assert(args.actionType == ActionType.Transfer); return TransferArgs({ amount: args.amount, accountOne: accounts[args.accountId], accountTwo: accounts[args.otherAccountId], market: args.primaryMarketId }); } function parseBuyArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (BuyArgs memory) { assert(args.actionType == ActionType.Buy); return BuyArgs({ amount: args.amount, account: accounts[args.accountId], makerMarket: args.primaryMarketId, takerMarket: args.secondaryMarketId, exchangeWrapper: args.otherAddress, orderData: args.data }); } function parseSellArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (SellArgs memory) { assert(args.actionType == ActionType.Sell); return SellArgs({ amount: args.amount, account: accounts[args.accountId], takerMarket: args.primaryMarketId, makerMarket: args.secondaryMarketId, exchangeWrapper: args.otherAddress, orderData: args.data }); } function parseTradeArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (TradeArgs memory) { assert(args.actionType == ActionType.Trade); return TradeArgs({ amount: args.amount, takerAccount: accounts[args.accountId], makerAccount: accounts[args.otherAccountId], inputMarket: args.primaryMarketId, outputMarket: args.secondaryMarketId, autoTrader: args.otherAddress, tradeData: args.data }); } function parseLiquidateArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (LiquidateArgs memory) { assert(args.actionType == ActionType.Liquidate); return LiquidateArgs({ amount: args.amount, solidAccount: accounts[args.accountId], liquidAccount: accounts[args.otherAccountId], owedMarket: args.primaryMarketId, heldMarket: args.secondaryMarketId }); } function parseVaporizeArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (VaporizeArgs memory) { assert(args.actionType == ActionType.Vaporize); return VaporizeArgs({ amount: args.amount, solidAccount: accounts[args.accountId], vaporAccount: accounts[args.otherAccountId], owedMarket: args.primaryMarketId, heldMarket: args.secondaryMarketId }); } function parseCallArgs( Account.Info[] memory accounts, ActionArgs memory args ) internal pure returns (CallArgs memory) { assert(args.actionType == ActionType.Call); return CallArgs({ account: accounts[args.accountId], callee: args.otherAddress, data: args.data }); } } library Math { using SafeMath for uint256; // ============ Constants ============ bytes32 constant FILE = "Math"; // ============ Library Functions ============ /* * Return target * (numerator / denominator). */ function getPartial( uint256 target, uint256 numerator, uint256 denominator ) internal pure returns (uint256) { return target.mul(numerator).div(denominator); } /* * Return target * (numerator / denominator), but rounded up. */ function getPartialRoundUp( uint256 target, uint256 numerator, uint256 denominator ) internal pure returns (uint256) { if (target == 0 || numerator == 0) { // SafeMath will check for zero denominator return SafeMath.div(0, denominator); } return target.mul(numerator).sub(1).div(denominator).add(1); } function to128( uint256 number ) internal pure returns (uint128) { uint128 result = uint128(number); Require.that( result == number, FILE, "Unsafe cast to uint128" ); return result; } function to96( uint256 number ) internal pure returns (uint96) { uint96 result = uint96(number); Require.that( result == number, FILE, "Unsafe cast to uint96" ); return result; } function to32( uint256 number ) internal pure returns (uint32) { uint32 result = uint32(number); Require.that( result == number, FILE, "Unsafe cast to uint32" ); return result; } function min( uint256 a, uint256 b ) internal pure returns (uint256) { return a < b ? a : b; } function max( uint256 a, uint256 b ) internal pure returns (uint256) { return a > b ? a : b; } } library Require { // ============ Constants ============ uint256 constant ASCII_ZERO = 48; // '0' uint256 constant ASCII_RELATIVE_ZERO = 87; // 'a' - 10 uint256 constant ASCII_LOWER_EX = 120; // 'x' bytes2 constant COLON = 0x3a20; // ': ' bytes2 constant COMMA = 0x2c20; // ', ' bytes2 constant LPAREN = 0x203c; // ' <' byte constant RPAREN = 0x3e; // '>' uint256 constant FOUR_BIT_MASK = 0xf; // ============ Library Functions ============ function that( bool must, bytes32 file, bytes32 reason ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason) ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, uint256 payloadA ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), RPAREN ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, uint256 payloadA, uint256 payloadB ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), COMMA, stringify(payloadB), RPAREN ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, address payloadA ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), RPAREN ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, address payloadA, uint256 payloadB ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), COMMA, stringify(payloadB), RPAREN ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, address payloadA, uint256 payloadB, uint256 payloadC ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), COMMA, stringify(payloadB), COMMA, stringify(payloadC), RPAREN ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, bytes32 payloadA ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), RPAREN ) ) ); } } function that( bool must, bytes32 file, bytes32 reason, bytes32 payloadA, uint256 payloadB, uint256 payloadC ) internal pure { if (!must) { revert( string( abi.encodePacked( stringifyTruncated(file), COLON, stringifyTruncated(reason), LPAREN, stringify(payloadA), COMMA, stringify(payloadB), COMMA, stringify(payloadC), RPAREN ) ) ); } } // ============ Private Functions ============ function stringifyTruncated( bytes32 input ) private pure returns (bytes memory) { // put the input bytes into the result bytes memory result = abi.encodePacked(input); // determine the length of the input by finding the location of the last non-zero byte for (uint256 i = 32; i > 0; ) { // reverse-for-loops with unsigned integer /* solium-disable-next-line security/no-modify-for-iter-var */ i--; // find the last non-zero byte in order to determine the length if (result[i] != 0) { uint256 length = i + 1; /* solium-disable-next-line security/no-inline-assembly */ assembly { mstore(result, length) // r.length = length; } return result; } } // all bytes are zero return new bytes(0); } function stringify( uint256 input ) private pure returns (bytes memory) { if (input == 0) { return "0"; } // get the final string length uint256 j = input; uint256 length; while (j != 0) { length++; j /= 10; } // allocate the string bytes memory bstr = new bytes(length); // populate the string starting with the least-significant character j = input; for (uint256 i = length; i > 0; ) { // reverse-for-loops with unsigned integer /* solium-disable-next-line security/no-modify-for-iter-var */ i--; // take last decimal digit bstr[i] = byte(uint8(ASCII_ZERO + (j % 10))); // remove the last decimal digit j /= 10; } return bstr; } function stringify( address input ) private pure returns (bytes memory) { uint256 z = uint256(input); // addresses are "0x" followed by 20 bytes of data which take up 2 characters each bytes memory result = new bytes(42); // populate the result with "0x" result[0] = byte(uint8(ASCII_ZERO)); result[1] = byte(uint8(ASCII_LOWER_EX)); // for each byte (starting from the lowest byte), populate the result with two characters for (uint256 i = 0; i < 20; i++) { // each byte takes two characters uint256 shift = i * 2; // populate the least-significant character result[41 - shift] = char(z & FOUR_BIT_MASK); z = z >> 4; // populate the most-significant character result[40 - shift] = char(z & FOUR_BIT_MASK); z = z >> 4; } return result; } function stringify( bytes32 input ) private pure returns (bytes memory) { uint256 z = uint256(input); // bytes32 are "0x" followed by 32 bytes of data which take up 2 characters each bytes memory result = new bytes(66); // populate the result with "0x" result[0] = byte(uint8(ASCII_ZERO)); result[1] = byte(uint8(ASCII_LOWER_EX)); // for each byte (starting from the lowest byte), populate the result with two characters for (uint256 i = 0; i < 32; i++) { // each byte takes two characters uint256 shift = i * 2; // populate the least-significant character result[65 - shift] = char(z & FOUR_BIT_MASK); z = z >> 4; // populate the most-significant character result[64 - shift] = char(z & FOUR_BIT_MASK); z = z >> 4; } return result; } function char( uint256 input ) private pure returns (byte) { // return ASCII digit (0-9) if (input < 10) { return byte(uint8(input + ASCII_ZERO)); } // return ASCII letter (a-f) return byte(uint8(input + ASCII_RELATIVE_ZERO)); } } library Types { using Math for uint256; // ============ AssetAmount ============ enum AssetDenomination { Wei, // the amount is denominated in wei Par // the amount is denominated in par } enum AssetReference { Delta, // the amount is given as a delta from the current value Target // the amount is given as an exact number to end up at } struct AssetAmount { bool sign; // true if positive AssetDenomination denomination; AssetReference ref; uint256 value; } // ============ Par (Principal Amount) ============ // Total borrow and supply values for a market struct TotalPar { uint128 borrow; uint128 supply; } // Individual principal amount for an account struct Par { bool sign; // true if positive uint128 value; } function zeroPar() internal pure returns (Par memory) { return Par({ sign: false, value: 0 }); } function sub( Par memory a, Par memory b ) internal pure returns (Par memory) { return add(a, negative(b)); } function add( Par memory a, Par memory b ) internal pure returns (Par memory) { Par memory result; if (a.sign == b.sign) { result.sign = a.sign; result.value = SafeMath.add(a.value, b.value).to128(); } else { if (a.value >= b.value) { result.sign = a.sign; result.value = SafeMath.sub(a.value, b.value).to128(); } else { result.sign = b.sign; result.value = SafeMath.sub(b.value, a.value).to128(); } } return result; } function equals( Par memory a, Par memory b ) internal pure returns (bool) { if (a.value == b.value) { if (a.value == 0) { return true; } return a.sign == b.sign; } return false; } function negative( Par memory a ) internal pure returns (Par memory) { return Par({ sign: !a.sign, value: a.value }); } function isNegative( Par memory a ) internal pure returns (bool) { return !a.sign && a.value > 0; } function isPositive( Par memory a ) internal pure returns (bool) { return a.sign && a.value > 0; } function isZero( Par memory a ) internal pure returns (bool) { return a.value == 0; } // ============ Wei (Token Amount) ============ // Individual token amount for an account struct Wei { bool sign; // true if positive uint256 value; } function zeroWei() internal pure returns (Wei memory) { return Wei({ sign: false, value: 0 }); } function sub( Wei memory a, Wei memory b ) internal pure returns (Wei memory) { return add(a, negative(b)); } function add( Wei memory a, Wei memory b ) internal pure returns (Wei memory) { Wei memory result; if (a.sign == b.sign) { result.sign = a.sign; result.value = SafeMath.add(a.value, b.value); } else { if (a.value >= b.value) { result.sign = a.sign; result.value = SafeMath.sub(a.value, b.value); } else { result.sign = b.sign; result.value = SafeMath.sub(b.value, a.value); } } return result; } function equals( Wei memory a, Wei memory b ) internal pure returns (bool) { if (a.value == b.value) { if (a.value == 0) { return true; } return a.sign == b.sign; } return false; } function negative( Wei memory a ) internal pure returns (Wei memory) { return Wei({ sign: !a.sign, value: a.value }); } function isNegative( Wei memory a ) internal pure returns (bool) { return !a.sign && a.value > 0; } function isPositive( Wei memory a ) internal pure returns (bool) { return a.sign && a.value > 0; } function isZero( Wei memory a ) internal pure returns (bool) { return a.value == 0; } } contract FulcrumSavingsProtocol is ProtocolInterface, DSAuth { address public constant NEW_IDAI_ADDRESS = 0x493C57C4763932315A328269E1ADaD09653B9081; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; address public savingsProxy; uint public decimals = 10 ** 18; function addSavingsProxy(address _savingsProxy) public auth { savingsProxy = _savingsProxy; } function deposit(address _user, uint _amount) public override { require(msg.sender == _user); // get dai from user require(ERC20(DAI_ADDRESS).transferFrom(_user, address(this), _amount)); // approve dai to Fulcrum ERC20(DAI_ADDRESS).approve(NEW_IDAI_ADDRESS, uint(-1)); // mint iDai ITokenInterface(NEW_IDAI_ADDRESS).mint(_user, _amount); } function withdraw(address _user, uint _amount) public override { require(msg.sender == _user); // transfer all users tokens to our contract require(ERC20(NEW_IDAI_ADDRESS).transferFrom(_user, address(this), ITokenInterface(NEW_IDAI_ADDRESS).balanceOf(_user))); // approve iDai to that contract ERC20(NEW_IDAI_ADDRESS).approve(NEW_IDAI_ADDRESS, uint(-1)); uint tokenPrice = ITokenInterface(NEW_IDAI_ADDRESS).tokenPrice(); // get dai from iDai contract ITokenInterface(NEW_IDAI_ADDRESS).burn(_user, _amount * decimals / tokenPrice); // return all remaining tokens back to user require(ERC20(NEW_IDAI_ADDRESS).transfer(_user, ITokenInterface(NEW_IDAI_ADDRESS).balanceOf(address(this)))); } } contract LoanShifterTaker is AdminAuth, ProxyPermission { ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; address public constant MANAGER_ADDRESS = 0x5ef30b9986345249bc32d8928B7ee64DE9435E39; Manager public constant manager = Manager(MANAGER_ADDRESS); ShifterRegistry public constant shifterRegistry = ShifterRegistry(0x2612Af3A521c2df9EAF28422Ca335b04AdF3ac66); enum Protocols { MCD, COMPOUND } enum SwapType { NO_SWAP, COLL_SWAP, DEBT_SWAP } struct LoanShiftData { Protocols fromProtocol; Protocols toProtocol; SwapType swapType; bool wholeDebt; uint collAmount; uint debtAmount; address debtAddr1; address debtAddr2; address addrLoan1; address addrLoan2; uint id1; uint id2; } /// @notice Main entry point, it will move or transform a loan /// @dev Called through DSProxy function moveLoan( SaverExchangeCore.ExchangeData memory _exchangeData, LoanShiftData memory _loanShift ) public { if (_isSameTypeVaults(_loanShift)) { _forkVault(_loanShift); return; } _callCloseAndOpen(_exchangeData, _loanShift); } //////////////////////// INTERNAL FUNCTIONS ////////////////////////// function _callCloseAndOpen( SaverExchangeCore.ExchangeData memory _exchangeData, LoanShiftData memory _loanShift ) internal { address protoAddr = shifterRegistry.getAddr(getNameByProtocol(uint8(_loanShift.fromProtocol))); uint loanAmount = _loanShift.debtAmount; if (_loanShift.wholeDebt) { loanAmount = ILoanShifter(protoAddr).getLoanAmount(_loanShift.id1, _loanShift.addrLoan1); } ( uint[8] memory numData, address[8] memory addrData, uint8[3] memory enumData, bytes memory callData ) = _packData(_loanShift, _exchangeData); // encode data bytes memory paramsData = abi.encode(numData, addrData, enumData, callData, address(this)); address payable loanShifterReceiverAddr = payable(shifterRegistry.getAddr("LOAN_SHIFTER_RECEIVER")); // call FL givePermission(loanShifterReceiverAddr); lendingPool.flashLoan(loanShifterReceiverAddr, getLoanAddr(_loanShift.debtAddr1, _loanShift.fromProtocol), loanAmount, paramsData); removePermission(loanShifterReceiverAddr); } function _forkVault(LoanShiftData memory _loanShift) internal { // Create new Vault to move to if (_loanShift.id2 == 0) { _loanShift.id2 = manager.open(manager.ilks(_loanShift.id1), address(this)); } if (_loanShift.wholeDebt) { manager.shift(_loanShift.id1, _loanShift.id2); } } function _isSameTypeVaults(LoanShiftData memory _loanShift) internal pure returns (bool) { return _loanShift.fromProtocol == Protocols.MCD && _loanShift.toProtocol == Protocols.MCD && _loanShift.addrLoan1 == _loanShift.addrLoan2; } function getNameByProtocol(uint8 _proto) internal pure returns (string memory) { if (_proto == 0) { return "MCD_SHIFTER"; } else if (_proto == 1) { return "COMP_SHIFTER"; } } function getLoanAddr(address _address, Protocols _fromProtocol) internal returns (address) { if (_fromProtocol == Protocols.COMPOUND) { return CTokenInterface(_address).underlying(); } else if (_fromProtocol == Protocols.MCD) { return DAI_ADDRESS; } else { return address(0); } } function _packData( LoanShiftData memory _loanShift, SaverExchangeCore.ExchangeData memory exchangeData ) internal pure returns (uint[8] memory numData, address[8] memory addrData, uint8[3] memory enumData, bytes memory callData) { numData = [ _loanShift.collAmount, _loanShift.debtAmount, _loanShift.id1, _loanShift.id2, exchangeData.srcAmount, exchangeData.destAmount, exchangeData.minPrice, exchangeData.price0x ]; addrData = [ _loanShift.addrLoan1, _loanShift.addrLoan2, _loanShift.debtAddr1, _loanShift.debtAddr2, exchangeData.srcAddr, exchangeData.destAddr, exchangeData.exchangeAddr, exchangeData.wrapper ]; enumData = [ uint8(_loanShift.fromProtocol), uint8(_loanShift.toProtocol), uint8(_loanShift.swapType) ]; callData = exchangeData.callData; } } contract ShifterRegistry is AdminAuth { mapping (string => address) public contractAddresses; bool public finalized; function changeContractAddr(string memory _contractName, address _protoAddr) public onlyOwner { require(!finalized); contractAddresses[_contractName] = _protoAddr; } function lock() public onlyOwner { finalized = true; } function getAddr(string memory _contractName) public view returns (address contractAddr) { contractAddr = contractAddresses[_contractName]; require(contractAddr != address(0), "No contract address registred"); } } library Address { function isContract(address account) internal view returns (bool) { // According to EIP-1052, 0x0 is the value returned for not-yet created accounts // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned // for accounts without code, i.e. `keccak256('')` bytes32 codehash; bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470; // solhint-disable-next-line no-inline-assembly assembly { codehash := extcodehash(account) } return (codehash != accountHash && codehash != 0x0); } function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return _functionCallWithValue(target, data, 0, errorMessage); } function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); return _functionCallWithValue(target, data, value, errorMessage); } function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) { require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: weiValue }(data); if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } contract BotRegistry is AdminAuth { mapping (address => bool) public botList; constructor() public { botList[0x776B4a13093e30B05781F97F6A4565B6aa8BE330] = true; botList[0xAED662abcC4FA3314985E67Ea993CAD064a7F5cF] = true; botList[0xa5d330F6619d6bF892A5B87D80272e1607b3e34D] = true; botList[0x5feB4DeE5150B589a7f567EA7CADa2759794A90A] = true; botList[0x7ca06417c1d6f480d3bB195B80692F95A6B66158] = true; } function setBot(address _botAddr, bool _state) public onlyOwner { botList[_botAddr] = _state; } } contract DFSProxy is Auth { string public constant NAME = "DFSProxy"; string public constant VERSION = "v0.1"; mapping(address => mapping(uint => bool)) public nonces; // --- EIP712 niceties --- bytes32 public DOMAIN_SEPARATOR; bytes32 public constant PERMIT_TYPEHASH = keccak256("callProxy(address _user,address _proxy,address _contract,bytes _txData,uint256 _nonce)"); constructor(uint256 chainId_) public { DOMAIN_SEPARATOR = keccak256(abi.encode( keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"), keccak256(bytes(NAME)), keccak256(bytes(VERSION)), chainId_, address(this) )); } function callProxy(address _user, address _proxy, address _contract, bytes calldata _txData, uint256 _nonce, uint8 _v, bytes32 _r, bytes32 _s) external payable onlyAuthorized { bytes32 digest = keccak256(abi.encodePacked( "\x19\x01", DOMAIN_SEPARATOR, keccak256(abi.encode(PERMIT_TYPEHASH, _user, _proxy, _contract, _txData, _nonce)) )); // user must be proxy owner require(DSProxyInterface(_proxy).owner() == _user); require(_user == ecrecover(digest, _v, _r, _s), "DFSProxy/user-not-valid"); require(!nonces[_user][_nonce], "DFSProxy/invalid-nonce"); nonces[_user][_nonce] = true; DSProxyInterface(_proxy).execute{value: msg.value}(_contract, _txData); } } contract DebugInfo { mapping (string => uint) public uintValues; mapping (string => address) public addrValues; mapping (string => string) public stringValues; mapping (string => bytes32) public bytes32Values; function logUint(string memory _id, uint _value) public { uintValues[_id] = _value; } function logAddr(string memory _id, address _value) public { addrValues[_id] = _value; } function logString(string memory _id, string memory _value) public { stringValues[_id] = _value; } function logBytes32(string memory _id, bytes32 _value) public { bytes32Values[_id] = _value; } } contract Discount { address public owner; mapping(address => CustomServiceFee) public serviceFees; uint256 constant MAX_SERVICE_FEE = 400; struct CustomServiceFee { bool active; uint256 amount; } constructor() public { owner = msg.sender; } function isCustomFeeSet(address _user) public view returns (bool) { return serviceFees[_user].active; } function getCustomServiceFee(address _user) public view returns (uint256) { return serviceFees[_user].amount; } function setServiceFee(address _user, uint256 _fee) public { require(msg.sender == owner, "Only owner"); require(_fee >= MAX_SERVICE_FEE || _fee == 0); serviceFees[_user] = CustomServiceFee({active: true, amount: _fee}); } function disableServiceFee(address _user) public { require(msg.sender == owner, "Only owner"); serviceFees[_user] = CustomServiceFee({active: false, amount: 0}); } } contract DydxFlashLoanBase { using SafeMath for uint256; address public constant SOLO_MARGIN_ADDRESS = 0x1E0447b19BB6EcFdAe1e4AE1694b0C3659614e4e; function _getMarketIdFromTokenAddress(address token) internal view returns (uint256) { return 0; } function _getRepaymentAmountInternal(uint256 amount) internal view returns (uint256) { // Needs to be overcollateralize // Needs to provide +2 wei to be safe return amount.add(2); } function _getAccountInfo() internal view returns (Account.Info memory) { return Account.Info({owner: address(this), number: 1}); } function _getWithdrawAction(uint marketId, uint256 amount, address contractAddr) internal view returns (Actions.ActionArgs memory) { return Actions.ActionArgs({ actionType: Actions.ActionType.Withdraw, accountId: 0, amount: Types.AssetAmount({ sign: false, denomination: Types.AssetDenomination.Wei, ref: Types.AssetReference.Delta, value: amount }), primaryMarketId: marketId, secondaryMarketId: 0, otherAddress: contractAddr, otherAccountId: 0, data: "" }); } function _getCallAction(bytes memory data, address contractAddr) internal view returns (Actions.ActionArgs memory) { return Actions.ActionArgs({ actionType: Actions.ActionType.Call, accountId: 0, amount: Types.AssetAmount({ sign: false, denomination: Types.AssetDenomination.Wei, ref: Types.AssetReference.Delta, value: 0 }), primaryMarketId: 0, secondaryMarketId: 0, otherAddress: contractAddr, otherAccountId: 0, data: data }); } function _getDepositAction(uint marketId, uint256 amount, address contractAddr) internal view returns (Actions.ActionArgs memory) { return Actions.ActionArgs({ actionType: Actions.ActionType.Deposit, accountId: 0, amount: Types.AssetAmount({ sign: true, denomination: Types.AssetDenomination.Wei, ref: Types.AssetReference.Delta, value: amount }), primaryMarketId: marketId, secondaryMarketId: 0, otherAddress: contractAddr, otherAccountId: 0, data: "" }); } } contract ExchangeDataParser { function decodeExchangeData( SaverExchangeCore.ExchangeData memory exchangeData ) internal pure returns (address[4] memory, uint[4] memory, bytes memory) { return ( [exchangeData.srcAddr, exchangeData.destAddr, exchangeData.exchangeAddr, exchangeData.wrapper], [exchangeData.srcAmount, exchangeData.destAmount, exchangeData.minPrice, exchangeData.price0x], exchangeData.callData ); } function encodeExchangeData( address[4] memory exAddr, uint[4] memory exNum, bytes memory callData ) internal pure returns (SaverExchangeCore.ExchangeData memory) { return SaverExchangeCore.ExchangeData({ srcAddr: exAddr[0], destAddr: exAddr[1], srcAmount: exNum[0], destAmount: exNum[1], minPrice: exNum[2], wrapper: exAddr[3], exchangeAddr: exAddr[2], callData: callData, price0x: exNum[3] }); } } interface IFlashLoanReceiver { function executeOperation(address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external; } abstract contract ILendingPoolAddressesProvider { function getLendingPool() public view virtual returns (address); function setLendingPoolImpl(address _pool) public virtual; function getLendingPoolCore() public virtual view returns (address payable); function setLendingPoolCoreImpl(address _lendingPoolCore) public virtual; function getLendingPoolConfigurator() public virtual view returns (address); function setLendingPoolConfiguratorImpl(address _configurator) public virtual; function getLendingPoolDataProvider() public virtual view returns (address); function setLendingPoolDataProviderImpl(address _provider) public virtual; function getLendingPoolParametersProvider() public virtual view returns (address); function setLendingPoolParametersProviderImpl(address _parametersProvider) public virtual; function getTokenDistributor() public virtual view returns (address); function setTokenDistributor(address _tokenDistributor) public virtual; function getFeeProvider() public virtual view returns (address); function setFeeProviderImpl(address _feeProvider) public virtual; function getLendingPoolLiquidationManager() public virtual view returns (address); function setLendingPoolLiquidationManager(address _manager) public virtual; function getLendingPoolManager() public virtual view returns (address); function setLendingPoolManager(address _lendingPoolManager) public virtual; function getPriceOracle() public virtual view returns (address); function setPriceOracle(address _priceOracle) public virtual; function getLendingRateOracle() public view virtual returns (address); function setLendingRateOracle(address _lendingRateOracle) public virtual; } library EthAddressLib { function ethAddress() internal pure returns(address) { return 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; } } abstract contract FlashLoanReceiverBase is IFlashLoanReceiver { using SafeERC20 for ERC20; using SafeMath for uint256; ILendingPoolAddressesProvider public addressesProvider; constructor(ILendingPoolAddressesProvider _provider) public { addressesProvider = _provider; } receive () external virtual payable {} function transferFundsBackToPoolInternal(address _reserve, uint256 _amount) internal { address payable core = addressesProvider.getLendingPoolCore(); transferInternal(core,_reserve, _amount); } function transferInternal(address payable _destination, address _reserve, uint256 _amount) internal { if(_reserve == EthAddressLib.ethAddress()) { //solium-disable-next-line _destination.call{value: _amount}(""); return; } ERC20(_reserve).safeTransfer(_destination, _amount); } function getBalanceInternal(address _target, address _reserve) internal view returns(uint256) { if(_reserve == EthAddressLib.ethAddress()) { return _target.balance; } return ERC20(_reserve).balanceOf(_target); } } contract GasBurner { // solhint-disable-next-line const-name-snakecase GasTokenInterface public constant gasToken = GasTokenInterface(0x0000000000b3F879cb30FE243b4Dfee438691c04); modifier burnGas(uint _amount) { if (gasToken.balanceOf(address(this)) >= _amount) { gasToken.free(_amount); } _; } } library SafeERC20 { using SafeMath for uint256; using Address for address; function safeTransfer(ERC20 token, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } function safeTransferFrom(ERC20 token, address from, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value)); } /** * @dev Deprecated. This function has issues similar to the ones found in * {IERC20-approve}, and its usage is discouraged. */ function safeApprove(ERC20 token, address spender, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value)); } function safeIncreaseAllowance(ERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).add(value); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } function safeDecreaseAllowance(ERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero"); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } function _callOptionalReturn(ERC20 token, bytes memory data) private { bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed"); if (returndata.length > 0) { // Return data is optional // solhint-disable-next-line max-line-length require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } } } library SafeMath { function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } contract ZrxAllowlist is AdminAuth { mapping (address => bool) public zrxAllowlist; mapping(address => bool) private nonPayableAddrs; constructor() public { zrxAllowlist[0x6958F5e95332D93D21af0D7B9Ca85B8212fEE0A5] = true; zrxAllowlist[0x61935CbDd02287B511119DDb11Aeb42F1593b7Ef] = true; zrxAllowlist[0xDef1C0ded9bec7F1a1670819833240f027b25EfF] = true; zrxAllowlist[0x080bf510FCbF18b91105470639e9561022937712] = true; nonPayableAddrs[0x080bf510FCbF18b91105470639e9561022937712] = true; } function setAllowlistAddr(address _zrxAddr, bool _state) public onlyOwner { zrxAllowlist[_zrxAddr] = _state; } function isZrxAddr(address _zrxAddr) public view returns (bool) { return zrxAllowlist[_zrxAddr]; } function addNonPayableAddr(address _nonPayableAddr) public onlyOwner { nonPayableAddrs[_nonPayableAddr] = true; } function removeNonPayableAddr(address _nonPayableAddr) public onlyOwner { nonPayableAddrs[_nonPayableAddr] = false; } function isNonPayableAddr(address _addr) public view returns(bool) { return nonPayableAddrs[_addr]; } } contract AaveBasicProxy is GasBurner { using SafeERC20 for ERC20; address public constant ETH_ADDR = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant AAVE_LENDING_POOL_ADDRESSES = 0x24a42fD28C976A61Df5D00D0599C34c4f90748c8; uint16 public constant AAVE_REFERRAL_CODE = 64; /// @notice User deposits tokens to the Aave protocol /// @dev User needs to approve the DSProxy to pull the _tokenAddr tokens /// @param _tokenAddr The address of the token to be deposited /// @param _amount Amount of tokens to be deposited function deposit(address _tokenAddr, uint256 _amount) public burnGas(5) payable { address lendingPoolCore = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); uint ethValue = _amount; if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(this), _amount); approveToken(_tokenAddr, lendingPoolCore); ethValue = 0; } ILendingPool(lendingPool).deposit{value: ethValue}(_tokenAddr, _amount, AAVE_REFERRAL_CODE); setUserUseReserveAsCollateralIfNeeded(_tokenAddr); } /// @notice User withdraws tokens from the Aave protocol /// @param _tokenAddr The address of the token to be withdrawn /// @param _aTokenAddr ATokens to be withdrawn /// @param _amount Amount of tokens to be withdrawn /// @param _wholeAmount If true we will take the whole amount on chain function withdraw(address _tokenAddr, address _aTokenAddr, uint256 _amount, bool _wholeAmount) public burnGas(8) { uint256 amount = _wholeAmount ? ERC20(_aTokenAddr).balanceOf(address(this)) : _amount; IAToken(_aTokenAddr).redeem(amount); withdrawTokens(_tokenAddr); } /// @notice User borrows tokens to the Aave protocol /// @param _tokenAddr The address of the token to be borrowed /// @param _amount Amount of tokens to be borrowed /// @param _type Send 1 for variable rate and 2 for fixed rate function borrow(address _tokenAddr, uint256 _amount, uint256 _type) public burnGas(8) { address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); ILendingPool(lendingPool).borrow(_tokenAddr, _amount, _type, AAVE_REFERRAL_CODE); withdrawTokens(_tokenAddr); } /// @dev User needs to approve the DSProxy to pull the _tokenAddr tokens /// @notice User paybacks tokens to the Aave protocol /// @param _tokenAddr The address of the token to be paybacked /// @param _aTokenAddr ATokens to be paybacked /// @param _amount Amount of tokens to be payed back /// @param _wholeDebt If true the _amount will be set to the whole amount of the debt function payback(address _tokenAddr, address _aTokenAddr, uint256 _amount, bool _wholeDebt) public burnGas(3) payable { address lendingPoolCore = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); uint256 amount = _amount; (,uint256 borrowAmount,,,,,uint256 originationFee,,,) = ILendingPool(lendingPool).getUserReserveData(_tokenAddr, address(this)); if (_wholeDebt) { amount = borrowAmount; } amount += originationFee; if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(this), amount); approveToken(_tokenAddr, lendingPoolCore); } ILendingPool(lendingPool).repay{value: msg.value}(_tokenAddr, amount, payable(address(this))); withdrawTokens(_tokenAddr); } /// @dev User needs to approve the DSProxy to pull the _tokenAddr tokens /// @notice User paybacks tokens to the Aave protocol /// @param _tokenAddr The address of the token to be paybacked /// @param _aTokenAddr ATokens to be paybacked /// @param _amount Amount of tokens to be payed back /// @param _wholeDebt If true the _amount will be set to the whole amount of the debt function paybackOnBehalf(address _tokenAddr, address _aTokenAddr, uint256 _amount, bool _wholeDebt, address payable _onBehalf) public burnGas(3) payable { address lendingPoolCore = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); uint256 amount = _amount; (,uint256 borrowAmount,,,,,uint256 originationFee,,,) = ILendingPool(lendingPool).getUserReserveData(_tokenAddr, _onBehalf); if (_wholeDebt) { amount = borrowAmount; } amount += originationFee; if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(this), amount); approveToken(_tokenAddr, lendingPoolCore); } ILendingPool(lendingPool).repay{value: msg.value}(_tokenAddr, amount, _onBehalf); withdrawTokens(_tokenAddr); } /// @notice Helper method to withdraw tokens from the DSProxy /// @param _tokenAddr Address of the token to be withdrawn function withdrawTokens(address _tokenAddr) public { uint256 amount = _tokenAddr == ETH_ADDR ? address(this).balance : ERC20(_tokenAddr).balanceOf(address(this)); if (amount > 0) { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransfer(msg.sender, amount); } else { msg.sender.transfer(amount); } } } /// @notice Approves token contract to pull underlying tokens from the DSProxy /// @param _tokenAddr Token we are trying to approve /// @param _caller Address which will gain the approval function approveToken(address _tokenAddr, address _caller) internal { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeApprove(_caller, 0); ERC20(_tokenAddr).safeApprove(_caller, uint256(-1)); } } function setUserUseReserveAsCollateralIfNeeded(address _tokenAddr) public { address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); (,,,,,,,,,bool collateralEnabled) = ILendingPool(lendingPool).getUserReserveData(_tokenAddr, address(this)); if (!collateralEnabled) { ILendingPool(lendingPool).setUserUseReserveAsCollateral(_tokenAddr, true); } } function setUserUseReserveAsCollateral(address _tokenAddr, bool _true) public { address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); ILendingPool(lendingPool).setUserUseReserveAsCollateral(_tokenAddr, _true); } function swapBorrowRateMode(address _reserve) public { address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); ILendingPool(lendingPool).swapBorrowRateMode(_reserve); } } contract AaveLoanInfo is AaveSafetyRatio { struct LoanData { address user; uint128 ratio; address[] collAddr; address[] borrowAddr; uint256[] collAmounts; uint256[] borrowAmounts; } struct TokenInfo { address aTokenAddress; address underlyingTokenAddress; uint256 collateralFactor; uint256 price; } struct TokenInfoFull { address aTokenAddress; address underlyingTokenAddress; uint256 supplyRate; uint256 borrowRate; uint256 totalSupply; uint256 availableLiquidity; uint256 totalBorrow; uint256 collateralFactor; uint256 price; bool usageAsCollateralEnabled; } /// @notice Calcualted the ratio of coll/debt for a compound user /// @param _user Address of the user function getRatio(address _user) public view returns (uint256) { // For each asset the account is in return getSafetyRatio(_user); } /// @notice Fetches Aave prices for tokens /// @param _tokens Arr. of tokens for which to get the prices /// @return prices Array of prices function getPrices(address[] memory _tokens) public view returns (uint256[] memory prices) { address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); prices = new uint[](_tokens.length); for (uint256 i = 0; i < _tokens.length; ++i) { prices[i] = IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_tokens[i]); } } /// @notice Fetches Aave collateral factors for tokens /// @param _tokens Arr. of tokens for which to get the coll. factors /// @return collFactors Array of coll. factors function getCollFactors(address[] memory _tokens) public view returns (uint256[] memory collFactors) { address lendingPoolCoreAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); collFactors = new uint256[](_tokens.length); for (uint256 i = 0; i < _tokens.length; ++i) { (,collFactors[i],,) = ILendingPool(lendingPoolCoreAddress).getReserveConfiguration(_tokens[i]); } } function getTokenBalances(address _user, address[] memory _tokens) public view returns (uint256[] memory balances, uint256[] memory borrows, bool[] memory enabledAsCollateral) { address lendingPoolAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); balances = new uint256[](_tokens.length); borrows = new uint256[](_tokens.length); enabledAsCollateral = new bool[](_tokens.length); for (uint256 i = 0; i < _tokens.length; i++) { address asset = _tokens[i]; (balances[i], borrows[i],,,,,,,,enabledAsCollateral[i]) = ILendingPool(lendingPoolAddress).getUserReserveData(asset, _user); } } /// @notice Calcualted the ratio of coll/debt for an aave user /// @param _users Addresses of the user /// @return ratios Array of ratios function getRatios(address[] memory _users) public view returns (uint256[] memory ratios) { ratios = new uint256[](_users.length); for (uint256 i = 0; i < _users.length; ++i) { ratios[i] = getSafetyRatio(_users[i]); } } /// @notice Information about reserves /// @param _tokenAddresses Array of tokens addresses /// @return tokens Array of reserves infomartion function getTokensInfo(address[] memory _tokenAddresses) public view returns(TokenInfo[] memory tokens) { address lendingPoolCoreAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); tokens = new TokenInfo[](_tokenAddresses.length); for (uint256 i = 0; i < _tokenAddresses.length; ++i) { (,uint256 ltv,,) = ILendingPool(lendingPoolCoreAddress).getReserveConfiguration(_tokenAddresses[i]); tokens[i] = TokenInfo({ aTokenAddress: ILendingPool(lendingPoolCoreAddress).getReserveATokenAddress(_tokenAddresses[i]), underlyingTokenAddress: _tokenAddresses[i], collateralFactor: ltv, price: IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_tokenAddresses[i]) }); } } /// @notice Information about reserves /// @param _tokenAddresses Array of token addresses /// @return tokens Array of reserves infomartion function getFullTokensInfo(address[] memory _tokenAddresses) public view returns(TokenInfoFull[] memory tokens) { address lendingPoolCoreAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); tokens = new TokenInfoFull[](_tokenAddresses.length); for (uint256 i = 0; i < _tokenAddresses.length; ++i) { (,uint256 ltv,,bool usageAsCollateralEnabled) = ILendingPool(lendingPoolCoreAddress).getReserveConfiguration(_tokenAddresses[i]); tokens[i] = TokenInfoFull({ aTokenAddress: ILendingPool(lendingPoolCoreAddress).getReserveATokenAddress(_tokenAddresses[i]), underlyingTokenAddress: _tokenAddresses[i], supplyRate: ILendingPool(lendingPoolCoreAddress).getReserveCurrentLiquidityRate(_tokenAddresses[i]), borrowRate: ILendingPool(lendingPoolCoreAddress).getReserveCurrentVariableBorrowRate(_tokenAddresses[i]), totalSupply: ILendingPool(lendingPoolCoreAddress).getReserveTotalLiquidity(_tokenAddresses[i]), availableLiquidity: ILendingPool(lendingPoolCoreAddress).getReserveAvailableLiquidity(_tokenAddresses[i]), totalBorrow: ILendingPool(lendingPoolCoreAddress).getReserveTotalBorrowsVariable(_tokenAddresses[i]), collateralFactor: ltv, price: IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(_tokenAddresses[i]), usageAsCollateralEnabled: usageAsCollateralEnabled }); } } /// @notice Fetches all the collateral/debt address and amounts, denominated in ether /// @param _user Address of the user /// @return data LoanData information function getLoanData(address _user) public view returns (LoanData memory data) { address lendingPoolAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); address priceOracleAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getPriceOracle(); address[] memory reserves = ILendingPool(lendingPoolAddress).getReserves(); data = LoanData({ user: _user, ratio: 0, collAddr: new address[](reserves.length), borrowAddr: new address[](reserves.length), collAmounts: new uint[](reserves.length), borrowAmounts: new uint[](reserves.length) }); uint64 collPos = 0; uint64 borrowPos = 0; for (uint64 i = 0; i < reserves.length; i++) { address reserve = reserves[i]; (uint256 aTokenBalance, uint256 borrowBalance,,,,,,,,) = ILendingPool(lendingPoolAddress).getUserReserveData(reserve, _user); uint256 price = IPriceOracleGetterAave(priceOracleAddress).getAssetPrice(reserves[i]); if (aTokenBalance > 0) { uint256 userTokenBalanceEth = wmul(aTokenBalance, price) * (10 ** (18 - _getDecimals(reserve))); data.collAddr[collPos] = reserve; data.collAmounts[collPos] = userTokenBalanceEth; collPos++; } // Sum up debt in Eth if (borrowBalance > 0) { uint256 userBorrowBalanceEth = wmul(borrowBalance, price) * (10 ** (18 - _getDecimals(reserve))); data.borrowAddr[borrowPos] = reserve; data.borrowAmounts[borrowPos] = userBorrowBalanceEth; borrowPos++; } } data.ratio = uint128(getSafetyRatio(_user)); return data; } /// @notice Fetches all the collateral/debt address and amounts, denominated in ether /// @param _users Addresses of the user /// @return loans Array of LoanData information function getLoanDataArr(address[] memory _users) public view returns (LoanData[] memory loans) { loans = new LoanData[](_users.length); for (uint i = 0; i < _users.length; ++i) { loans[i] = getLoanData(_users[i]); } } } contract AaveMonitor is AdminAuth, DSMath, AaveSafetyRatio, GasBurner { using SafeERC20 for ERC20; enum Method { Boost, Repay } uint public REPAY_GAS_TOKEN = 19; uint public BOOST_GAS_TOKEN = 19; uint public MAX_GAS_PRICE = 200000000000; // 200 gwei uint public REPAY_GAS_COST = 2000000; uint public BOOST_GAS_COST = 2000000; address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; AaveMonitorProxy public aaveMonitorProxy; AaveSubscriptions public subscriptionsContract; address public aaveSaverProxy; DefisaverLogger public logger = DefisaverLogger(DEFISAVER_LOGGER); modifier onlyApproved() { require(BotRegistry(BOT_REGISTRY_ADDRESS).botList(msg.sender), "Not auth bot"); _; } /// @param _aaveMonitorProxy Proxy contracts that actually is authorized to call DSProxy /// @param _subscriptions Subscriptions contract for Aave positions /// @param _aaveSaverProxy Contract that actually performs Repay/Boost constructor(address _aaveMonitorProxy, address _subscriptions, address _aaveSaverProxy) public { aaveMonitorProxy = AaveMonitorProxy(_aaveMonitorProxy); subscriptionsContract = AaveSubscriptions(_subscriptions); aaveSaverProxy = _aaveSaverProxy; } /// @notice Bots call this method to repay for user when conditions are met /// @dev If the contract ownes gas token it will try and use it for gas price reduction /// @param _exData Exchange data /// @param _user The actual address that owns the Aave position function repayFor( SaverExchangeCore.ExchangeData memory _exData, address _user ) public payable onlyApproved burnGas(REPAY_GAS_TOKEN) { (bool isAllowed, uint ratioBefore) = canCall(Method.Repay, _user); require(isAllowed); // check if conditions are met uint256 gasCost = calcGasCost(REPAY_GAS_COST); aaveMonitorProxy.callExecute{value: msg.value}( _user, aaveSaverProxy, abi.encodeWithSignature( "repay((address,address,uint256,uint256,uint256,address,address,bytes,uint256),uint256)", _exData, gasCost ) ); (bool isGoodRatio, uint ratioAfter) = ratioGoodAfter(Method.Repay, _user); require(isGoodRatio); // check if the after result of the actions is good returnEth(); logger.Log(address(this), _user, "AutomaticAaveRepay", abi.encode(ratioBefore, ratioAfter)); } /// @notice Bots call this method to boost for user when conditions are met /// @dev If the contract ownes gas token it will try and use it for gas price reduction /// @param _exData Exchange data /// @param _user The actual address that owns the Aave position function boostFor( SaverExchangeCore.ExchangeData memory _exData, address _user ) public payable onlyApproved burnGas(BOOST_GAS_TOKEN) { (bool isAllowed, uint ratioBefore) = canCall(Method.Boost, _user); require(isAllowed); // check if conditions are met uint256 gasCost = calcGasCost(BOOST_GAS_COST); aaveMonitorProxy.callExecute{value: msg.value}( _user, aaveSaverProxy, abi.encodeWithSignature( "boost((address,address,uint256,uint256,uint256,address,address,bytes,uint256),uint256)", _exData, gasCost ) ); (bool isGoodRatio, uint ratioAfter) = ratioGoodAfter(Method.Boost, _user); require(isGoodRatio); // check if the after result of the actions is good returnEth(); logger.Log(address(this), _user, "AutomaticAaveBoost", abi.encode(ratioBefore, ratioAfter)); } /******************* INTERNAL METHODS ********************************/ function returnEth() internal { // return if some eth left if (address(this).balance > 0) { msg.sender.transfer(address(this).balance); } } /******************* STATIC METHODS ********************************/ /// @notice Checks if Boost/Repay could be triggered for the CDP /// @dev Called by AaveMonitor to enforce the min/max check /// @param _method Type of action to be called /// @param _user The actual address that owns the Aave position /// @return Boolean if it can be called and the ratio function canCall(Method _method, address _user) public view returns(bool, uint) { bool subscribed = subscriptionsContract.isSubscribed(_user); AaveSubscriptions.AaveHolder memory holder = subscriptionsContract.getHolder(_user); // check if cdp is subscribed if (!subscribed) return (false, 0); // check if boost and boost allowed if (_method == Method.Boost && !holder.boostEnabled) return (false, 0); uint currRatio = getSafetyRatio(_user); if (_method == Method.Repay) { return (currRatio < holder.minRatio, currRatio); } else if (_method == Method.Boost) { return (currRatio > holder.maxRatio, currRatio); } } /// @dev After the Boost/Repay check if the ratio doesn't trigger another call /// @param _method Type of action to be called /// @param _user The actual address that owns the Aave position /// @return Boolean if the recent action preformed correctly and the ratio function ratioGoodAfter(Method _method, address _user) public view returns(bool, uint) { AaveSubscriptions.AaveHolder memory holder; holder= subscriptionsContract.getHolder(_user); uint currRatio = getSafetyRatio(_user); if (_method == Method.Repay) { return (currRatio < holder.maxRatio, currRatio); } else if (_method == Method.Boost) { return (currRatio > holder.minRatio, currRatio); } } /// @notice Calculates gas cost (in Eth) of tx /// @dev Gas price is limited to MAX_GAS_PRICE to prevent attack of draining user CDP /// @param _gasAmount Amount of gas used for the tx function calcGasCost(uint _gasAmount) public view returns (uint) { uint gasPrice = tx.gasprice <= MAX_GAS_PRICE ? tx.gasprice : MAX_GAS_PRICE; return mul(gasPrice, _gasAmount); } /******************* OWNER ONLY OPERATIONS ********************************/ /// @notice Allows owner to change gas cost for boost operation, but only up to 3 millions /// @param _gasCost New gas cost for boost method function changeBoostGasCost(uint _gasCost) public onlyOwner { require(_gasCost < 3000000); BOOST_GAS_COST = _gasCost; } /// @notice Allows owner to change gas cost for repay operation, but only up to 3 millions /// @param _gasCost New gas cost for repay method function changeRepayGasCost(uint _gasCost) public onlyOwner { require(_gasCost < 3000000); REPAY_GAS_COST = _gasCost; } /// @notice Allows owner to change max gas price /// @param _maxGasPrice New max gas price function changeMaxGasPrice(uint _maxGasPrice) public onlyOwner { require(_maxGasPrice < 500000000000); MAX_GAS_PRICE = _maxGasPrice; } /// @notice Allows owner to change gas token amount /// @param _gasTokenAmount New gas token amount /// @param _repay true if repay gas token, false if boost gas token function changeGasTokenAmount(uint _gasTokenAmount, bool _repay) public onlyOwner { if (_repay) { REPAY_GAS_TOKEN = _gasTokenAmount; } else { BOOST_GAS_TOKEN = _gasTokenAmount; } } } contract AaveMonitorProxy is AdminAuth { using SafeERC20 for ERC20; uint public CHANGE_PERIOD; address public monitor; address public newMonitor; address public lastMonitor; uint public changeRequestedTimestamp; mapping(address => bool) public allowed; event MonitorChangeInitiated(address oldMonitor, address newMonitor); event MonitorChangeCanceled(); event MonitorChangeFinished(address monitor); event MonitorChangeReverted(address monitor); // if someone who is allowed become malicious, owner can't be changed modifier onlyAllowed() { require(allowed[msg.sender] || msg.sender == owner); _; } modifier onlyMonitor() { require (msg.sender == monitor); _; } constructor(uint _changePeriod) public { CHANGE_PERIOD = _changePeriod * 1 days; } /// @notice Only monitor contract is able to call execute on users proxy /// @param _owner Address of cdp owner (users DSProxy address) /// @param _aaveSaverProxy Address of AaveSaverProxy /// @param _data Data to send to AaveSaverProxy function callExecute(address _owner, address _aaveSaverProxy, bytes memory _data) public payable onlyMonitor { // execute reverts if calling specific method fails DSProxyInterface(_owner).execute{value: msg.value}(_aaveSaverProxy, _data); // return if anything left if (address(this).balance > 0) { msg.sender.transfer(address(this).balance); } } /// @notice Allowed users are able to set Monitor contract without any waiting period first time /// @param _monitor Address of Monitor contract function setMonitor(address _monitor) public onlyAllowed { require(monitor == address(0)); monitor = _monitor; } /// @notice Allowed users are able to start procedure for changing monitor /// @dev after CHANGE_PERIOD needs to call confirmNewMonitor to actually make a change /// @param _newMonitor address of new monitor function changeMonitor(address _newMonitor) public onlyAllowed { require(changeRequestedTimestamp == 0); changeRequestedTimestamp = now; lastMonitor = monitor; newMonitor = _newMonitor; emit MonitorChangeInitiated(lastMonitor, newMonitor); } /// @notice At any point allowed users are able to cancel monitor change function cancelMonitorChange() public onlyAllowed { require(changeRequestedTimestamp > 0); changeRequestedTimestamp = 0; newMonitor = address(0); emit MonitorChangeCanceled(); } /// @notice Anyone is able to confirm new monitor after CHANGE_PERIOD if process is started function confirmNewMonitor() public onlyAllowed { require((changeRequestedTimestamp + CHANGE_PERIOD) < now); require(changeRequestedTimestamp != 0); require(newMonitor != address(0)); monitor = newMonitor; newMonitor = address(0); changeRequestedTimestamp = 0; emit MonitorChangeFinished(monitor); } /// @notice Its possible to revert monitor to last used monitor function revertMonitor() public onlyAllowed { require(lastMonitor != address(0)); monitor = lastMonitor; emit MonitorChangeReverted(monitor); } /// @notice Allowed users are able to add new allowed user /// @param _user Address of user that will be allowed function addAllowed(address _user) public onlyAllowed { allowed[_user] = true; } /// @notice Allowed users are able to remove allowed user /// @dev owner is always allowed even if someone tries to remove it from allowed mapping /// @param _user Address of allowed user function removeAllowed(address _user) public onlyAllowed { allowed[_user] = false; } function setChangePeriod(uint _periodInDays) public onlyAllowed { require(_periodInDays * 1 days > CHANGE_PERIOD); CHANGE_PERIOD = _periodInDays * 1 days; } /// @notice In case something is left in contract, owner is able to withdraw it /// @param _token address of token to withdraw balance function withdrawToken(address _token) public onlyOwner { uint balance = ERC20(_token).balanceOf(address(this)); ERC20(_token).safeTransfer(msg.sender, balance); } /// @notice In case something is left in contract, owner is able to withdraw it function withdrawEth() public onlyOwner { uint balance = address(this).balance; msg.sender.transfer(balance); } } contract AaveSubscriptions is AdminAuth { struct AaveHolder { address user; uint128 minRatio; uint128 maxRatio; uint128 optimalRatioBoost; uint128 optimalRatioRepay; bool boostEnabled; } struct SubPosition { uint arrPos; bool subscribed; } AaveHolder[] public subscribers; mapping (address => SubPosition) public subscribersPos; uint public changeIndex; event Subscribed(address indexed user); event Unsubscribed(address indexed user); event Updated(address indexed user); event ParamUpdates(address indexed user, uint128, uint128, uint128, uint128, bool); /// @dev Called by the DSProxy contract which owns the Aave position /// @notice Adds the users Aave poistion in the list of subscriptions so it can be monitored /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalBoost Ratio amount which boost should target /// @param _optimalRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled function subscribe(uint128 _minRatio, uint128 _maxRatio, uint128 _optimalBoost, uint128 _optimalRepay, bool _boostEnabled) external { // if boost is not enabled, set max ratio to max uint uint128 localMaxRatio = _boostEnabled ? _maxRatio : uint128(-1); require(checkParams(_minRatio, localMaxRatio), "Must be correct params"); SubPosition storage subInfo = subscribersPos[msg.sender]; AaveHolder memory subscription = AaveHolder({ minRatio: _minRatio, maxRatio: localMaxRatio, optimalRatioBoost: _optimalBoost, optimalRatioRepay: _optimalRepay, user: msg.sender, boostEnabled: _boostEnabled }); changeIndex++; if (subInfo.subscribed) { subscribers[subInfo.arrPos] = subscription; emit Updated(msg.sender); emit ParamUpdates(msg.sender, _minRatio, localMaxRatio, _optimalBoost, _optimalRepay, _boostEnabled); } else { subscribers.push(subscription); subInfo.arrPos = subscribers.length - 1; subInfo.subscribed = true; emit Subscribed(msg.sender); } } /// @notice Called by the users DSProxy /// @dev Owner who subscribed cancels his subscription function unsubscribe() external { _unsubscribe(msg.sender); } /// @dev Checks limit if minRatio is bigger than max /// @param _minRatio Minimum ratio, bellow which repay can be triggered /// @param _maxRatio Maximum ratio, over which boost can be triggered /// @return Returns bool if the params are correct function checkParams(uint128 _minRatio, uint128 _maxRatio) internal pure returns (bool) { if (_minRatio > _maxRatio) { return false; } return true; } /// @dev Internal method to remove a subscriber from the list /// @param _user The actual address that owns the Aave position function _unsubscribe(address _user) internal { require(subscribers.length > 0, "Must have subscribers in the list"); SubPosition storage subInfo = subscribersPos[_user]; require(subInfo.subscribed, "Must first be subscribed"); address lastOwner = subscribers[subscribers.length - 1].user; SubPosition storage subInfo2 = subscribersPos[lastOwner]; subInfo2.arrPos = subInfo.arrPos; subscribers[subInfo.arrPos] = subscribers[subscribers.length - 1]; subscribers.pop(); // remove last element and reduce arr length changeIndex++; subInfo.subscribed = false; subInfo.arrPos = 0; emit Unsubscribed(msg.sender); } /// @dev Checks if the user is subscribed /// @param _user The actual address that owns the Aave position /// @return If the user is subscribed function isSubscribed(address _user) public view returns (bool) { SubPosition storage subInfo = subscribersPos[_user]; return subInfo.subscribed; } /// @dev Returns subscribtion information about a user /// @param _user The actual address that owns the Aave position /// @return Subscription information about the user if exists function getHolder(address _user) public view returns (AaveHolder memory) { SubPosition storage subInfo = subscribersPos[_user]; return subscribers[subInfo.arrPos]; } /// @notice Helper method to return all the subscribed CDPs /// @return List of all subscribers function getSubscribers() public view returns (AaveHolder[] memory) { return subscribers; } /// @notice Helper method for the frontend, returns all the subscribed CDPs paginated /// @param _page What page of subscribers you want /// @param _perPage Number of entries per page /// @return List of all subscribers for that page function getSubscribersByPage(uint _page, uint _perPage) public view returns (AaveHolder[] memory) { AaveHolder[] memory holders = new AaveHolder[](_perPage); uint start = _page * _perPage; uint end = start + _perPage; end = (end > holders.length) ? holders.length : end; uint count = 0; for (uint i = start; i < end; i++) { holders[count] = subscribers[i]; count++; } return holders; } ////////////// ADMIN METHODS /////////////////// /// @notice Admin function to unsubscribe a position /// @param _user The actual address that owns the Aave position function unsubscribeByAdmin(address _user) public onlyOwner { SubPosition storage subInfo = subscribersPos[_user]; if (subInfo.subscribed) { _unsubscribe(_user); } } } contract AaveSubscriptionsProxy is ProxyPermission { address public constant AAVE_SUBSCRIPTION_ADDRESS = 0xe08ff7A2BADb634F0b581E675E6B3e583De086FC; address public constant AAVE_MONITOR_PROXY = 0xfA560Dba3a8D0B197cA9505A2B98120DD89209AC; /// @notice Calls subscription contract and creates a DSGuard if non existent /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalRatioBoost Ratio amount which boost should target /// @param _optimalRatioRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled function subscribe( uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled ) public { givePermission(AAVE_MONITOR_PROXY); IAaveSubscription(AAVE_SUBSCRIPTION_ADDRESS).subscribe( _minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled); } /// @notice Calls subscription contract and updated existing parameters /// @dev If subscription is non existent this will create one /// @param _minRatio Minimum ratio below which repay is triggered /// @param _maxRatio Maximum ratio after which boost is triggered /// @param _optimalRatioBoost Ratio amount which boost should target /// @param _optimalRatioRepay Ratio amount which repay should target /// @param _boostEnabled Boolean determing if boost is enabled function update( uint128 _minRatio, uint128 _maxRatio, uint128 _optimalRatioBoost, uint128 _optimalRatioRepay, bool _boostEnabled ) public { IAaveSubscription(AAVE_SUBSCRIPTION_ADDRESS).subscribe(_minRatio, _maxRatio, _optimalRatioBoost, _optimalRatioRepay, _boostEnabled); } /// @notice Calls the subscription contract to unsubscribe the caller function unsubscribe() public { removePermission(AAVE_MONITOR_PROXY); IAaveSubscription(AAVE_SUBSCRIPTION_ADDRESS).unsubscribe(); } } contract AaveImport is AaveHelper, AdminAuth { using SafeERC20 for ERC20; address public constant WETH_ADDRESS = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address public constant BASIC_PROXY = 0x9D266997bc73B27d4302E711b55FD78B5278e1De; address public constant AETH_ADDRESS = 0x3a3A65aAb0dd2A17E3F1947bA16138cd37d08c04; function callFunction( address sender, Account.Info memory account, bytes memory data ) public { ( address collateralToken, address borrowToken, uint256 ethAmount, address user, address proxy ) = abi.decode(data, (address,address,uint256,address,address)); // withdraw eth TokenInterface(WETH_ADDRESS).withdraw(ethAmount); address lendingPoolCoreAddress = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); address aCollateralToken = ILendingPool(lendingPoolCoreAddress).getReserveATokenAddress(collateralToken); address aBorrowToken = ILendingPool(lendingPoolCoreAddress).getReserveATokenAddress(borrowToken); // deposit eth on behalf of proxy DSProxy(payable(proxy)).execute{value: ethAmount}(BASIC_PROXY, abi.encodeWithSignature("deposit(address,uint256)", ETH_ADDR, ethAmount)); // borrow needed amount to repay users borrow (,uint256 borrowAmount,,uint256 borrowRateMode,,,uint256 originationFee,,,) = ILendingPool(lendingPool).getUserReserveData(borrowToken, user); borrowAmount += originationFee; DSProxy(payable(proxy)).execute(BASIC_PROXY, abi.encodeWithSignature("borrow(address,uint256,uint256)", borrowToken, borrowAmount, borrowRateMode)); // payback on behalf of user ERC20(borrowToken).safeApprove(proxy, borrowAmount); DSProxy(payable(proxy)).execute(BASIC_PROXY, abi.encodeWithSignature("paybackOnBehalf(address,address,uint256,bool,address)", borrowToken, aBorrowToken, 0, true, user)); // pull tokens from user to proxy ERC20(aCollateralToken).safeTransferFrom(user, proxy, ERC20(aCollateralToken).balanceOf(user)); // enable as collateral DSProxy(payable(proxy)).execute(BASIC_PROXY, abi.encodeWithSignature("setUserUseReserveAsCollateralIfNeeded(address)", collateralToken)); // withdraw deposited eth DSProxy(payable(proxy)).execute(BASIC_PROXY, abi.encodeWithSignature("withdraw(address,address,uint256,bool)", ETH_ADDR, AETH_ADDRESS, ethAmount, false)); // deposit eth, get weth and return to sender TokenInterface(WETH_ADDRESS).deposit.value(address(this).balance)(); ERC20(WETH_ADDRESS).safeTransfer(proxy, ethAmount+2); } /// @dev if contract receive eth, convert it to WETH receive() external payable { // deposit eth and get weth if (msg.sender == owner) { TokenInterface(WETH_ADDRESS).deposit.value(address(this).balance)(); } } } contract AaveImportTaker is DydxFlashLoanBase, ProxyPermission { address public constant WETH_ADDR = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address payable public constant AAVE_IMPORT = 0x44e4EF23b4794699D0625657cADcB96e07820fFe; address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; address public constant PROXY_REGISTRY_ADDRESS = 0x4678f0a6958e4D2Bc4F1BAF7Bc52E8F3564f3fE4; /// @notice Starts the process to move users position 1 collateral and 1 borrow /// @dev User must send 2 wei with this transaction /// @dev User must approve AaveImport to pull _aCollateralToken /// @param _collateralToken Collateral token we are moving to DSProxy /// @param _borrowToken Borrow token we are moving to DSProxy /// @param _ethAmount ETH amount that needs to be pulled from dydx function importLoan(address _collateralToken, address _borrowToken, uint _ethAmount) public { ISoloMargin solo = ISoloMargin(SOLO_MARGIN_ADDRESS); // Get marketId from token address uint256 marketId = _getMarketIdFromTokenAddress(WETH_ADDR); // Calculate repay amount (_amount + (2 wei)) // Approve transfer from uint256 repayAmount = _getRepaymentAmountInternal(_ethAmount); ERC20(WETH_ADDR).approve(SOLO_MARGIN_ADDRESS, repayAmount); Actions.ActionArgs[] memory operations = new Actions.ActionArgs[](3); operations[0] = _getWithdrawAction(marketId, _ethAmount, AAVE_IMPORT); operations[1] = _getCallAction( abi.encode(_collateralToken, _borrowToken, _ethAmount, msg.sender, address(this)), AAVE_IMPORT ); operations[2] = _getDepositAction(marketId, repayAmount, address(this)); Account.Info[] memory accountInfos = new Account.Info[](1); accountInfos[0] = _getAccountInfo(); givePermission(AAVE_IMPORT); solo.operate(accountInfos, operations); removePermission(AAVE_IMPORT); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "AaveImport", abi.encode(_collateralToken, _borrowToken)); } } contract CompoundBasicProxy is GasBurner { address public constant ETH_ADDR = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant COMPTROLLER_ADDR = 0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B; using SafeERC20 for ERC20; /// @notice User deposits tokens to the Compound protocol /// @dev User needs to approve the DSProxy to pull the _tokenAddr tokens /// @param _tokenAddr The address of the token to be deposited /// @param _cTokenAddr CTokens to be deposited /// @param _amount Amount of tokens to be deposited /// @param _inMarket True if the token is already in market for that address function deposit(address _tokenAddr, address _cTokenAddr, uint _amount, bool _inMarket) public burnGas(5) payable { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(this), _amount); } approveToken(_tokenAddr, _cTokenAddr); if (!_inMarket) { enterMarket(_cTokenAddr); } if (_tokenAddr != ETH_ADDR) { require(CTokenInterface(_cTokenAddr).mint(_amount) == 0); } else { CEtherInterface(_cTokenAddr).mint{value: msg.value}(); // reverts on fail } } /// @notice User withdraws tokens to the Compound protocol /// @param _tokenAddr The address of the token to be withdrawn /// @param _cTokenAddr CTokens to be withdrawn /// @param _amount Amount of tokens to be withdrawn /// @param _isCAmount If true _amount is cTokens if falls _amount is underlying tokens function withdraw(address _tokenAddr, address _cTokenAddr, uint _amount, bool _isCAmount) public burnGas(5) { if (_isCAmount) { require(CTokenInterface(_cTokenAddr).redeem(_amount) == 0); } else { require(CTokenInterface(_cTokenAddr).redeemUnderlying(_amount) == 0); } // withdraw funds to msg.sender if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransfer(msg.sender, ERC20(_tokenAddr).balanceOf(address(this))); } else { msg.sender.transfer(address(this).balance); } } /// @notice User borrows tokens to the Compound protocol /// @param _tokenAddr The address of the token to be borrowed /// @param _cTokenAddr CTokens to be borrowed /// @param _amount Amount of tokens to be borrowed /// @param _inMarket True if the token is already in market for that address function borrow(address _tokenAddr, address _cTokenAddr, uint _amount, bool _inMarket) public burnGas(8) { if (!_inMarket) { enterMarket(_cTokenAddr); } require(CTokenInterface(_cTokenAddr).borrow(_amount) == 0); // withdraw funds to msg.sender if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransfer(msg.sender, ERC20(_tokenAddr).balanceOf(address(this))); } else { msg.sender.transfer(address(this).balance); } } /// @dev User needs to approve the DSProxy to pull the _tokenAddr tokens /// @notice User paybacks tokens to the Compound protocol /// @param _tokenAddr The address of the token to be paybacked /// @param _cTokenAddr CTokens to be paybacked /// @param _amount Amount of tokens to be payedback /// @param _wholeDebt If true the _amount will be set to the whole amount of the debt function payback(address _tokenAddr, address _cTokenAddr, uint _amount, bool _wholeDebt) public burnGas(5) payable { approveToken(_tokenAddr, _cTokenAddr); if (_wholeDebt) { _amount = CTokenInterface(_cTokenAddr).borrowBalanceCurrent(address(this)); } if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransferFrom(msg.sender, address(this), _amount); require(CTokenInterface(_cTokenAddr).repayBorrow(_amount) == 0); } else { CEtherInterface(_cTokenAddr).repayBorrow{value: msg.value}(); msg.sender.transfer(address(this).balance); // send back the extra eth } } /// @notice Helper method to withdraw tokens from the DSProxy /// @param _tokenAddr Address of the token to be withdrawn function withdrawTokens(address _tokenAddr) public { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeTransfer(msg.sender, ERC20(_tokenAddr).balanceOf(address(this))); } else { msg.sender.transfer(address(this).balance); } } /// @notice Enters the Compound market so it can be deposited/borrowed /// @param _cTokenAddr CToken address of the token function enterMarket(address _cTokenAddr) public { address[] memory markets = new address[](1); markets[0] = _cTokenAddr; ComptrollerInterface(COMPTROLLER_ADDR).enterMarkets(markets); } /// @notice Exits the Compound market so it can't be deposited/borrowed /// @param _cTokenAddr CToken address of the token function exitMarket(address _cTokenAddr) public { ComptrollerInterface(COMPTROLLER_ADDR).exitMarket(_cTokenAddr); } /// @notice Approves CToken contract to pull underlying tokens from the DSProxy /// @param _tokenAddr Token we are trying to approve /// @param _cTokenAddr Address which will gain the approval function approveToken(address _tokenAddr, address _cTokenAddr) internal { if (_tokenAddr != ETH_ADDR) { ERC20(_tokenAddr).safeApprove(_cTokenAddr, 0); ERC20(_tokenAddr).safeApprove(_cTokenAddr, uint(-1)); } } } contract CompoundSafetyRatio is Exponential, DSMath { // solhint-disable-next-line const-name-snakecase ComptrollerInterface public constant comp = ComptrollerInterface(0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B); /// @notice Calcualted the ratio of debt / adjusted collateral /// @param _user Address of the user function getSafetyRatio(address _user) public view returns (uint) { // For each asset the account is in address[] memory assets = comp.getAssetsIn(_user); address oracleAddr = comp.oracle(); uint sumCollateral = 0; uint sumBorrow = 0; for (uint i = 0; i < assets.length; i++) { address asset = assets[i]; (, uint cTokenBalance, uint borrowBalance, uint exchangeRateMantissa) = CTokenInterface(asset).getAccountSnapshot(_user); Exp memory oraclePrice; if (cTokenBalance != 0 || borrowBalance != 0) { oraclePrice = Exp({mantissa: CompoundOracleInterface(oracleAddr).getUnderlyingPrice(asset)}); } // Sum up collateral in Usd if (cTokenBalance != 0) { (, uint collFactorMantissa) = comp.markets(address(asset)); Exp memory collateralFactor = Exp({mantissa: collFactorMantissa}); Exp memory exchangeRate = Exp({mantissa: exchangeRateMantissa}); (, Exp memory tokensToUsd) = mulExp3(collateralFactor, exchangeRate, oraclePrice); (, sumCollateral) = mulScalarTruncateAddUInt(tokensToUsd, cTokenBalance, sumCollateral); } // Sum up debt in Usd if (borrowBalance != 0) { (, sumBorrow) = mulScalarTruncateAddUInt(oraclePrice, borrowBalance, sumBorrow); } } if (sumBorrow == 0) return uint(-1); uint borrowPowerUsed = (sumBorrow * 10**18) / sumCollateral; return wdiv(1e18, borrowPowerUsed); } } contract CompoundMonitor is AdminAuth, DSMath, CompoundSafetyRatio, GasBurner { using SafeERC20 for ERC20; enum Method { Boost, Repay } uint public REPAY_GAS_TOKEN = 20; uint public BOOST_GAS_TOKEN = 20; uint constant public MAX_GAS_PRICE = 500000000000; // 500 gwei uint public REPAY_GAS_COST = 2000000; uint public BOOST_GAS_COST = 2000000; address public constant GAS_TOKEN_INTERFACE_ADDRESS = 0x0000000000b3F879cb30FE243b4Dfee438691c04; address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; address public constant BOT_REGISTRY_ADDRESS = 0x637726f8b08a7ABE3aE3aCaB01A80E2d8ddeF77B; CompoundMonitorProxy public compoundMonitorProxy; CompoundSubscriptions public subscriptionsContract; address public compoundFlashLoanTakerAddress; DefisaverLogger public logger = DefisaverLogger(DEFISAVER_LOGGER); modifier onlyApproved() { require(BotRegistry(BOT_REGISTRY_ADDRESS).botList(msg.sender), "Not auth bot"); _; } /// @param _compoundMonitorProxy Proxy contracts that actually is authorized to call DSProxy /// @param _subscriptions Subscriptions contract for Compound positions /// @param _compoundFlashLoanTaker Contract that actually performs Repay/Boost constructor(address _compoundMonitorProxy, address _subscriptions, address _compoundFlashLoanTaker) public { compoundMonitorProxy = CompoundMonitorProxy(_compoundMonitorProxy); subscriptionsContract = CompoundSubscriptions(_subscriptions); compoundFlashLoanTakerAddress = _compoundFlashLoanTaker; } /// @notice Bots call this method to repay for user when conditions are met /// @dev If the contract ownes gas token it will try and use it for gas price reduction /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress, exchangeAddress] /// @param _user The actual address that owns the Compound position function repayFor( SaverExchangeCore.ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress address _user ) public payable onlyApproved burnGas(REPAY_GAS_TOKEN) { (bool isAllowed, uint ratioBefore) = canCall(Method.Repay, _user); require(isAllowed); // check if conditions are met uint256 gasCost = calcGasCost(REPAY_GAS_COST); compoundMonitorProxy.callExecute{value: msg.value}( _user, compoundFlashLoanTakerAddress, abi.encodeWithSignature( "repayWithLoan((address,address,uint256,uint256,uint256,address,address,bytes,uint256),address[2],uint256)", _exData, _cAddresses, gasCost ) ); (bool isGoodRatio, uint ratioAfter) = ratioGoodAfter(Method.Repay, _user); require(isGoodRatio); // check if the after result of the actions is good returnEth(); logger.Log(address(this), _user, "AutomaticCompoundRepay", abi.encode(ratioBefore, ratioAfter)); } /// @notice Bots call this method to boost for user when conditions are met /// @dev If the contract ownes gas token it will try and use it for gas price reduction /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress, exchangeAddress] /// @param _user The actual address that owns the Compound position function boostFor( SaverExchangeCore.ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress address _user ) public payable onlyApproved burnGas(BOOST_GAS_TOKEN) { (bool isAllowed, uint ratioBefore) = canCall(Method.Boost, _user); require(isAllowed); // check if conditions are met uint256 gasCost = calcGasCost(BOOST_GAS_COST); compoundMonitorProxy.callExecute{value: msg.value}( _user, compoundFlashLoanTakerAddress, abi.encodeWithSignature( "boostWithLoan((address,address,uint256,uint256,uint256,address,address,bytes,uint256),address[2],uint256)", _exData, _cAddresses, gasCost ) ); (bool isGoodRatio, uint ratioAfter) = ratioGoodAfter(Method.Boost, _user); require(isGoodRatio); // check if the after result of the actions is good returnEth(); logger.Log(address(this), _user, "AutomaticCompoundBoost", abi.encode(ratioBefore, ratioAfter)); } /******************* INTERNAL METHODS ********************************/ function returnEth() internal { // return if some eth left if (address(this).balance > 0) { msg.sender.transfer(address(this).balance); } } /******************* STATIC METHODS ********************************/ /// @notice Checks if Boost/Repay could be triggered for the CDP /// @dev Called by MCDMonitor to enforce the min/max check /// @param _method Type of action to be called /// @param _user The actual address that owns the Compound position /// @return Boolean if it can be called and the ratio function canCall(Method _method, address _user) public view returns(bool, uint) { bool subscribed = subscriptionsContract.isSubscribed(_user); CompoundSubscriptions.CompoundHolder memory holder = subscriptionsContract.getHolder(_user); // check if cdp is subscribed if (!subscribed) return (false, 0); // check if boost and boost allowed if (_method == Method.Boost && !holder.boostEnabled) return (false, 0); uint currRatio = getSafetyRatio(_user); if (_method == Method.Repay) { return (currRatio < holder.minRatio, currRatio); } else if (_method == Method.Boost) { return (currRatio > holder.maxRatio, currRatio); } } /// @dev After the Boost/Repay check if the ratio doesn't trigger another call /// @param _method Type of action to be called /// @param _user The actual address that owns the Compound position /// @return Boolean if the recent action preformed correctly and the ratio function ratioGoodAfter(Method _method, address _user) public view returns(bool, uint) { CompoundSubscriptions.CompoundHolder memory holder; holder= subscriptionsContract.getHolder(_user); uint currRatio = getSafetyRatio(_user); if (_method == Method.Repay) { return (currRatio < holder.maxRatio, currRatio); } else if (_method == Method.Boost) { return (currRatio > holder.minRatio, currRatio); } } /// @notice Calculates gas cost (in Eth) of tx /// @dev Gas price is limited to MAX_GAS_PRICE to prevent attack of draining user CDP /// @param _gasAmount Amount of gas used for the tx function calcGasCost(uint _gasAmount) public view returns (uint) { uint gasPrice = tx.gasprice <= MAX_GAS_PRICE ? tx.gasprice : MAX_GAS_PRICE; return mul(gasPrice, _gasAmount); } /******************* OWNER ONLY OPERATIONS ********************************/ /// @notice Allows owner to change gas cost for boost operation, but only up to 3 millions /// @param _gasCost New gas cost for boost method function changeBoostGasCost(uint _gasCost) public onlyOwner { require(_gasCost < 3000000); BOOST_GAS_COST = _gasCost; } /// @notice Allows owner to change gas cost for repay operation, but only up to 3 millions /// @param _gasCost New gas cost for repay method function changeRepayGasCost(uint _gasCost) public onlyOwner { require(_gasCost < 3000000); REPAY_GAS_COST = _gasCost; } /// @notice If any tokens gets stuck in the contract owner can withdraw it /// @param _tokenAddress Address of the ERC20 token /// @param _to Address of the receiver /// @param _amount The amount to be sent function transferERC20(address _tokenAddress, address _to, uint _amount) public onlyOwner { ERC20(_tokenAddress).safeTransfer(_to, _amount); } /// @notice If any Eth gets stuck in the contract owner can withdraw it /// @param _to Address of the receiver /// @param _amount The amount to be sent function transferEth(address payable _to, uint _amount) public onlyOwner { _to.transfer(_amount); } } contract CompoundSaverHelper is DSMath, Exponential { using SafeERC20 for ERC20; address payable public constant WALLET_ADDR = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; address public constant DISCOUNT_ADDR = 0x1b14E8D511c9A4395425314f849bD737BAF8208F; uint public constant MANUAL_SERVICE_FEE = 400; // 0.25% Fee uint public constant AUTOMATIC_SERVICE_FEE = 333; // 0.3% Fee address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant CETH_ADDRESS = 0x4Ddc2D193948926D02f9B1fE9e1daa0718270ED5; address public constant COMPTROLLER = 0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B; address public constant COMPOUND_LOGGER = 0x3DD0CDf5fFA28C6847B4B276e2fD256046a44bb7; address public constant BOT_REGISTRY_ADDRESS = 0x637726f8b08a7ABE3aE3aCaB01A80E2d8ddeF77B; /// @notice Helper method to payback the Compound debt /// @dev If amount is bigger it will repay the whole debt and send the extra to the _user /// @param _amount Amount of tokens we want to repay /// @param _cBorrowToken Ctoken address we are repaying /// @param _borrowToken Token address we are repaying /// @param _user Owner of the compound position we are paying back function paybackDebt(uint _amount, address _cBorrowToken, address _borrowToken, address payable _user) internal { uint wholeDebt = CTokenInterface(_cBorrowToken).borrowBalanceCurrent(address(this)); if (_amount > wholeDebt) { if (_borrowToken == ETH_ADDRESS) { _user.transfer((_amount - wholeDebt)); } else { ERC20(_borrowToken).safeTransfer(_user, (_amount - wholeDebt)); } _amount = wholeDebt; } approveCToken(_borrowToken, _cBorrowToken); if (_borrowToken == ETH_ADDRESS) { CEtherInterface(_cBorrowToken).repayBorrow{value: _amount}(); } else { require(CTokenInterface(_cBorrowToken).repayBorrow(_amount) == 0); } } /// @notice Calculates the fee amount /// @param _amount Amount that is converted /// @param _user Actuall user addr not DSProxy /// @param _gasCost Ether amount of gas we are spending for tx /// @param _cTokenAddr CToken addr. of token we are getting for the fee /// @return feeAmount The amount we took for the fee function getFee(uint _amount, address _user, uint _gasCost, address _cTokenAddr) internal returns (uint feeAmount) { uint fee = MANUAL_SERVICE_FEE; if (BotRegistry(BOT_REGISTRY_ADDRESS).botList(tx.origin)) { fee = AUTOMATIC_SERVICE_FEE; } address tokenAddr = getUnderlyingAddr(_cTokenAddr); if (Discount(DISCOUNT_ADDR).isCustomFeeSet(_user)) { fee = Discount(DISCOUNT_ADDR).getCustomServiceFee(_user); } feeAmount = (fee == 0) ? 0 : (_amount / fee); if (_gasCost != 0) { address oracle = ComptrollerInterface(COMPTROLLER).oracle(); uint usdTokenPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(_cTokenAddr); uint ethPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(CETH_ADDRESS); uint tokenPriceInEth = wdiv(usdTokenPrice, ethPrice); _gasCost = wdiv(_gasCost, tokenPriceInEth); feeAmount = add(feeAmount, _gasCost); } // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } if (tokenAddr == ETH_ADDRESS) { WALLET_ADDR.transfer(feeAmount); } else { ERC20(tokenAddr).safeTransfer(WALLET_ADDR, feeAmount); } } /// @notice Calculates the gas cost of transaction and send it to wallet /// @param _amount Amount that is converted /// @param _gasCost Ether amount of gas we are spending for tx /// @param _cTokenAddr CToken addr. of token we are getting for the fee /// @return feeAmount The amount we took for the fee function getGasCost(uint _amount, uint _gasCost, address _cTokenAddr) internal returns (uint feeAmount) { address tokenAddr = getUnderlyingAddr(_cTokenAddr); if (_gasCost != 0) { address oracle = ComptrollerInterface(COMPTROLLER).oracle(); uint usdTokenPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(_cTokenAddr); uint ethPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(CETH_ADDRESS); uint tokenPriceInEth = wdiv(usdTokenPrice, ethPrice); feeAmount = wdiv(_gasCost, tokenPriceInEth); } // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } if (tokenAddr == ETH_ADDRESS) { WALLET_ADDR.transfer(feeAmount); } else { ERC20(tokenAddr).safeTransfer(WALLET_ADDR, feeAmount); } } /// @notice Enters the market for the collatera and borrow tokens /// @param _cTokenAddrColl Collateral address we are entering the market in /// @param _cTokenAddrBorrow Borrow address we are entering the market in function enterMarket(address _cTokenAddrColl, address _cTokenAddrBorrow) internal { address[] memory markets = new address[](2); markets[0] = _cTokenAddrColl; markets[1] = _cTokenAddrBorrow; ComptrollerInterface(COMPTROLLER).enterMarkets(markets); } /// @notice Approves CToken contract to pull underlying tokens from the DSProxy /// @param _tokenAddr Token we are trying to approve /// @param _cTokenAddr Address which will gain the approval function approveCToken(address _tokenAddr, address _cTokenAddr) internal { if (_tokenAddr != ETH_ADDRESS) { ERC20(_tokenAddr).safeApprove(_cTokenAddr, 0); ERC20(_tokenAddr).safeApprove(_cTokenAddr, uint(-1)); } } /// @notice Returns the underlying address of the cToken asset /// @param _cTokenAddress cToken address /// @return Token address of the cToken specified function getUnderlyingAddr(address _cTokenAddress) internal returns (address) { if (_cTokenAddress == CETH_ADDRESS) { return ETH_ADDRESS; } else { return CTokenInterface(_cTokenAddress).underlying(); } } /// @notice Returns the owner of the DSProxy that called the contract function getUserAddress() internal view returns (address) { DSProxy proxy = DSProxy(uint160(address(this))); return proxy.owner(); } /// @notice Returns the maximum amount of collateral available to withdraw /// @dev Due to rounding errors the result is - 1% wei from the exact amount /// @param _cCollAddress Collateral we are getting the max value of /// @param _account Users account /// @return Returns the max. collateral amount in that token function getMaxCollateral(address _cCollAddress, address _account) public returns (uint) { (, uint liquidityInUsd, ) = ComptrollerInterface(COMPTROLLER).getAccountLiquidity(_account); uint usersBalance = CTokenInterface(_cCollAddress).balanceOfUnderlying(_account); address oracle = ComptrollerInterface(COMPTROLLER).oracle(); if (liquidityInUsd == 0) return usersBalance; CTokenInterface(_cCollAddress).accrueInterest(); (, uint collFactorMantissa) = ComptrollerInterface(COMPTROLLER).markets(_cCollAddress); Exp memory collateralFactor = Exp({mantissa: collFactorMantissa}); (, uint tokensToUsd) = divScalarByExpTruncate(liquidityInUsd, collateralFactor); uint usdPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(_cCollAddress); uint liqInToken = wdiv(tokensToUsd, usdPrice); if (liqInToken > usersBalance) return usersBalance; return sub(liqInToken, (liqInToken / 100)); // cut off 1% due to rounding issues } /// @notice Returns the maximum amount of borrow amount available /// @dev Due to rounding errors the result is - 1% wei from the exact amount /// @param _cBorrowAddress Borrow token we are getting the max value of /// @param _account Users account /// @return Returns the max. borrow amount in that token function getMaxBorrow(address _cBorrowAddress, address _account) public returns (uint) { (, uint liquidityInUsd, ) = ComptrollerInterface(COMPTROLLER).getAccountLiquidity(_account); address oracle = ComptrollerInterface(COMPTROLLER).oracle(); CTokenInterface(_cBorrowAddress).accrueInterest(); uint usdPrice = CompoundOracleInterface(oracle).getUnderlyingPrice(_cBorrowAddress); uint liquidityInToken = wdiv(liquidityInUsd, usdPrice); return sub(liquidityInToken, (liquidityInToken / 100)); // cut off 1% due to rounding issues } } contract CompoundImportFlashLoan is FlashLoanReceiverBase { using SafeERC20 for ERC20; ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); address public constant COMPOUND_BORROW_PROXY = 0xb7EDC39bE76107e2Cc645f0f6a3D164f5e173Ee2; address public owner; constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public { owner = msg.sender; } /// @notice Called by Aave when sending back the FL amount /// @param _reserve The address of the borrowed token /// @param _amount Amount of FL tokens received /// @param _fee FL Aave fee /// @param _params The params that are sent from the original FL caller contract function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { ( address cCollateralToken, address cBorrowToken, address user, address proxy ) = abi.decode(_params, (address,address,address,address)); // approve FL tokens so we can repay them ERC20(_reserve).safeApprove(cBorrowToken, 0); ERC20(_reserve).safeApprove(cBorrowToken, uint(-1)); // repay compound debt require(CTokenInterface(cBorrowToken).repayBorrowBehalf(user, uint(-1)) == 0, "Repay borrow behalf fail"); // transfer cTokens to proxy uint cTokenBalance = CTokenInterface(cCollateralToken).balanceOf(user); require(CTokenInterface(cCollateralToken).transferFrom(user, proxy, cTokenBalance)); // borrow bytes memory proxyData = getProxyData(cCollateralToken, cBorrowToken, _reserve, (_amount + _fee)); DSProxyInterface(proxy).execute(COMPOUND_BORROW_PROXY, proxyData); // Repay the loan with the money DSProxy sent back transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); } /// @notice Formats function data call so we can call it through DSProxy /// @param _cCollToken CToken address of collateral /// @param _cBorrowToken CToken address we will borrow /// @param _borrowToken Token address we will borrow /// @param _amount Amount that will be borrowed /// @return proxyData Formated function call data function getProxyData(address _cCollToken, address _cBorrowToken, address _borrowToken, uint _amount) internal pure returns (bytes memory proxyData) { proxyData = abi.encodeWithSignature( "borrow(address,address,address,uint256)", _cCollToken, _cBorrowToken, _borrowToken, _amount); } function withdrawStuckFunds(address _tokenAddr, uint _amount) public { require(owner == msg.sender, "Must be owner"); if (_tokenAddr == 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE) { msg.sender.transfer(_amount); } else { ERC20(_tokenAddr).safeTransfer(owner, _amount); } } } contract CompoundImportTaker is CompoundSaverHelper, ProxyPermission, GasBurner { ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); address payable public constant COMPOUND_IMPORT_FLASH_LOAN = 0x0a9238e14d5A20CDb03811B12D1984587C3CE9a0; address public constant PROXY_REGISTRY_ADDRESS = 0x4678f0a6958e4D2Bc4F1BAF7Bc52E8F3564f3fE4; DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); /// @notice Starts the process to move users position 1 collateral and 1 borrow /// @dev User must approve COMPOUND_IMPORT_FLASH_LOAN to pull _cCollateralToken /// @param _cCollateralToken Collateral we are moving to DSProxy /// @param _cBorrowToken Borrow token we are moving to DSProxy function importLoan(address _cCollateralToken, address _cBorrowToken) external burnGas(20) { address proxy = getProxy(); uint loanAmount = CTokenInterface(_cBorrowToken).borrowBalanceCurrent(msg.sender); bytes memory paramsData = abi.encode(_cCollateralToken, _cBorrowToken, msg.sender, proxy); givePermission(COMPOUND_IMPORT_FLASH_LOAN); lendingPool.flashLoan(COMPOUND_IMPORT_FLASH_LOAN, getUnderlyingAddr(_cBorrowToken), loanAmount, paramsData); removePermission(COMPOUND_IMPORT_FLASH_LOAN); logger.Log(address(this), msg.sender, "CompoundImport", abi.encode(loanAmount, 0, _cCollateralToken)); } /// @notice Gets proxy address, if user doesn't has DSProxy build it /// @return proxy DsProxy address function getProxy() internal returns (address proxy) { proxy = ProxyRegistryInterface(PROXY_REGISTRY_ADDRESS).proxies(msg.sender); if (proxy == address(0)) { proxy = ProxyRegistryInterface(PROXY_REGISTRY_ADDRESS).build(msg.sender); } } } contract SaverExchangeCore is SaverExchangeHelper, DSMath { // first is empty to keep the legacy order in place enum ExchangeType { _, OASIS, KYBER, UNISWAP, ZEROX } enum ActionType { SELL, BUY } struct ExchangeData { address srcAddr; address destAddr; uint srcAmount; uint destAmount; uint minPrice; address wrapper; address exchangeAddr; bytes callData; uint256 price0x; } /// @notice Internal method that preforms a sell on 0x/on-chain /// @dev Usefull for other DFS contract to integrate for exchanging /// @param exData Exchange data struct /// @return (address, uint) Address of the wrapper used and destAmount function _sell(ExchangeData memory exData) internal returns (address, uint) { address wrapper; uint swapedTokens; bool success; uint tokensLeft = exData.srcAmount; // if selling eth, convert to weth if (exData.srcAddr == KYBER_ETH_ADDRESS) { exData.srcAddr = ethToWethAddr(exData.srcAddr); TokenInterface(WETH_ADDRESS).deposit.value(exData.srcAmount)(); } // Try 0x first and then fallback on specific wrapper if (exData.price0x > 0) { approve0xProxy(exData.srcAddr, exData.srcAmount); uint ethAmount = getProtocolFee(exData.srcAddr, msg.value, exData.srcAmount); (success, swapedTokens, tokensLeft) = takeOrder(exData, ethAmount, ActionType.SELL); if (success) { wrapper = exData.exchangeAddr; } } // fallback to desired wrapper if 0x failed if (!success) { swapedTokens = saverSwap(exData, ActionType.SELL); wrapper = exData.wrapper; } require(getBalance(exData.destAddr) >= wmul(exData.minPrice, exData.srcAmount), "Final amount isn't correct"); // if anything is left in weth, pull it to user as eth if (getBalance(WETH_ADDRESS) > 0) { TokenInterface(WETH_ADDRESS).withdraw( TokenInterface(WETH_ADDRESS).balanceOf(address(this)) ); } return (wrapper, swapedTokens); } /// @notice Internal method that preforms a buy on 0x/on-chain /// @dev Usefull for other DFS contract to integrate for exchanging /// @param exData Exchange data struct /// @return (address, uint) Address of the wrapper used and srcAmount function _buy(ExchangeData memory exData) internal returns (address, uint) { address wrapper; uint swapedTokens; bool success; require(exData.destAmount != 0, "Dest amount must be specified"); // if selling eth, convert to weth if (exData.srcAddr == KYBER_ETH_ADDRESS) { exData.srcAddr = ethToWethAddr(exData.srcAddr); TokenInterface(WETH_ADDRESS).deposit.value(exData.srcAmount)(); } if (exData.price0x > 0) { approve0xProxy(exData.srcAddr, exData.srcAmount); uint ethAmount = getProtocolFee(exData.srcAddr, msg.value, exData.srcAmount); (success, swapedTokens,) = takeOrder(exData, ethAmount, ActionType.BUY); if (success) { wrapper = exData.exchangeAddr; } } // fallback to desired wrapper if 0x failed if (!success) { swapedTokens = saverSwap(exData, ActionType.BUY); wrapper = exData.wrapper; } require(swapedTokens >= exData.destAmount, "Final amount isn't correct"); // if anything is left in weth, pull it to user as eth if (getBalance(WETH_ADDRESS) > 0) { TokenInterface(WETH_ADDRESS).withdraw( TokenInterface(WETH_ADDRESS).balanceOf(address(this)) ); } return (wrapper, getBalance(exData.destAddr)); } /// @notice Takes order from 0x and returns bool indicating if it is successful /// @param _exData Exchange data /// @param _ethAmount Ether fee needed for 0x order function takeOrder( ExchangeData memory _exData, uint256 _ethAmount, ActionType _type ) private returns (bool success, uint256, uint256) { // write in the exact amount we are selling/buing in an order if (_type == ActionType.SELL) { writeUint256(_exData.callData, 36, _exData.srcAmount); } else { writeUint256(_exData.callData, 36, _exData.destAmount); } if (ZrxAllowlist(ZRX_ALLOWLIST_ADDR).isNonPayableAddr(_exData.exchangeAddr)) { _ethAmount = 0; } uint256 tokensBefore = getBalance(_exData.destAddr); if (ZrxAllowlist(ZRX_ALLOWLIST_ADDR).isZrxAddr(_exData.exchangeAddr)) { (success, ) = _exData.exchangeAddr.call{value: _ethAmount}(_exData.callData); } else { success = false; } uint256 tokensSwaped = 0; uint256 tokensLeft = _exData.srcAmount; if (success) { // check to see if any _src tokens are left over after exchange tokensLeft = getBalance(_exData.srcAddr); // convert weth -> eth if needed if (_exData.destAddr == KYBER_ETH_ADDRESS) { TokenInterface(WETH_ADDRESS).withdraw( TokenInterface(WETH_ADDRESS).balanceOf(address(this)) ); } // get the current balance of the swaped tokens tokensSwaped = getBalance(_exData.destAddr) - tokensBefore; } return (success, tokensSwaped, tokensLeft); } /// @notice Calls wraper contract for exchage to preform an on-chain swap /// @param _exData Exchange data struct /// @param _type Type of action SELL|BUY /// @return swapedTokens For Sell that the destAmount, for Buy thats the srcAmount function saverSwap(ExchangeData memory _exData, ActionType _type) internal returns (uint swapedTokens) { require(SaverExchangeRegistry(SAVER_EXCHANGE_REGISTRY).isWrapper(_exData.wrapper), "Wrapper is not valid"); uint ethValue = 0; ERC20(_exData.srcAddr).safeTransfer(_exData.wrapper, _exData.srcAmount); if (_type == ActionType.SELL) { swapedTokens = ExchangeInterfaceV2(_exData.wrapper). sell{value: ethValue}(_exData.srcAddr, _exData.destAddr, _exData.srcAmount); } else { swapedTokens = ExchangeInterfaceV2(_exData.wrapper). buy{value: ethValue}(_exData.srcAddr, _exData.destAddr, _exData.destAmount); } } function writeUint256(bytes memory _b, uint256 _index, uint _input) internal pure { if (_b.length < _index + 32) { revert("Incorrent lengt while writting bytes32"); } bytes32 input = bytes32(_input); _index += 32; // Read the bytes32 from array memory assembly { mstore(add(_b, _index), input) } } /// @notice Converts Kybers Eth address -> Weth /// @param _src Input address function ethToWethAddr(address _src) internal pure returns (address) { return _src == KYBER_ETH_ADDRESS ? WETH_ADDRESS : _src; } /// @notice Calculates protocol fee /// @param _srcAddr selling token address (if eth should be WETH) /// @param _msgValue msg.value in transaction /// @param _srcAmount amount we are selling function getProtocolFee(address _srcAddr, uint256 _msgValue, uint256 _srcAmount) internal returns(uint256) { // if we are not selling ETH msg value is always the protocol fee if (_srcAddr != WETH_ADDRESS) return _msgValue; // if msg value is larger than srcAmount, that means that msg value is protocol fee + srcAmount, so we subsctract srcAmount from msg value // we have an edge case here when protocol fee is higher than selling amount if (_msgValue > _srcAmount) return _msgValue - _srcAmount; // if msg value is lower than src amount, that means that srcAmount isn't included in msg value, so we return msg value return _msgValue; } function packExchangeData(ExchangeData memory _exData) public pure returns(bytes memory) { // splitting in two different bytes and encoding all because of stack too deep in decoding part bytes memory part1 = abi.encode( _exData.srcAddr, _exData.destAddr, _exData.srcAmount, _exData.destAmount ); bytes memory part2 = abi.encode( _exData.minPrice, _exData.wrapper, _exData.exchangeAddr, _exData.callData, _exData.price0x ); return abi.encode(part1, part2); } function unpackExchangeData(bytes memory _data) public pure returns(ExchangeData memory _exData) { ( bytes memory part1, bytes memory part2 ) = abi.decode(_data, (bytes,bytes)); ( _exData.srcAddr, _exData.destAddr, _exData.srcAmount, _exData.destAmount ) = abi.decode(part1, (address,address,uint256,uint256)); ( _exData.minPrice, _exData.wrapper, _exData.exchangeAddr, _exData.callData, _exData.price0x ) = abi.decode(part2, (uint256,address,address,bytes,uint256)); } // solhint-disable-next-line no-empty-blocks receive() external virtual payable {} } contract KyberWrapper is DSMath, ExchangeInterfaceV2, AdminAuth { address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant KYBER_INTERFACE = 0x9AAb3f75489902f3a48495025729a0AF77d4b11e; address payable public constant WALLET_ID = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; using SafeERC20 for ERC20; /// @notice Sells a _srcAmount of tokens at Kyber /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Destination amount function sell(address _srcAddr, address _destAddr, uint _srcAmount) external override payable returns (uint) { ERC20 srcToken = ERC20(_srcAddr); ERC20 destToken = ERC20(_destAddr); KyberNetworkProxyInterface kyberNetworkProxy = KyberNetworkProxyInterface(KYBER_INTERFACE); if (_srcAddr != KYBER_ETH_ADDRESS) { srcToken.safeApprove(address(kyberNetworkProxy), _srcAmount); } uint destAmount = kyberNetworkProxy.trade{value: msg.value}( srcToken, _srcAmount, destToken, msg.sender, uint(-1), 0, WALLET_ID ); return destAmount; } /// @notice Buys a _destAmount of tokens at Kyber /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint srcAmount function buy(address _srcAddr, address _destAddr, uint _destAmount) external override payable returns(uint) { ERC20 srcToken = ERC20(_srcAddr); ERC20 destToken = ERC20(_destAddr); uint srcAmount = 0; if (_srcAddr != KYBER_ETH_ADDRESS) { srcAmount = srcToken.balanceOf(address(this)); } else { srcAmount = msg.value; } KyberNetworkProxyInterface kyberNetworkProxy = KyberNetworkProxyInterface(KYBER_INTERFACE); if (_srcAddr != KYBER_ETH_ADDRESS) { srcToken.safeApprove(address(kyberNetworkProxy), srcAmount); } uint destAmount = kyberNetworkProxy.trade{value: msg.value}( srcToken, srcAmount, destToken, msg.sender, _destAmount, 0, WALLET_ID ); require(destAmount == _destAmount, "Wrong dest amount"); uint srcAmountAfter = 0; if (_srcAddr != KYBER_ETH_ADDRESS) { srcAmountAfter = srcToken.balanceOf(address(this)); } else { srcAmountAfter = address(this).balance; } // Send the leftover from the source token back sendLeftOver(_srcAddr); return (srcAmount - srcAmountAfter); } /// @notice Return a rate for which we can sell an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return rate Rate function getSellRate(address _srcAddr, address _destAddr, uint _srcAmount) public override view returns (uint rate) { (rate, ) = KyberNetworkProxyInterface(KYBER_INTERFACE) .getExpectedRate(ERC20(_srcAddr), ERC20(_destAddr), _srcAmount); // multiply with decimal difference in src token rate = rate * (10**(18 - getDecimals(_srcAddr))); // divide with decimal difference in dest token rate = rate / (10**(18 - getDecimals(_destAddr))); } /// @notice Return a rate for which we can buy an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return rate Rate function getBuyRate(address _srcAddr, address _destAddr, uint _destAmount) public override view returns (uint rate) { uint256 srcRate = getSellRate(_destAddr, _srcAddr, _destAmount); uint256 srcAmount = wmul(srcRate, _destAmount); rate = getSellRate(_srcAddr, _destAddr, srcAmount); // increase rate by 3% too account for inaccuracy between sell/buy conversion rate = rate + (rate / 30); } /// @notice Send any leftover tokens, we use to clear out srcTokens after buy /// @param _srcAddr Source token address function sendLeftOver(address _srcAddr) internal { msg.sender.transfer(address(this).balance); if (_srcAddr != KYBER_ETH_ADDRESS) { ERC20(_srcAddr).safeTransfer(msg.sender, ERC20(_srcAddr).balanceOf(address(this))); } } receive() payable external {} function getDecimals(address _token) internal view returns (uint256) { if (_token == KYBER_ETH_ADDRESS) return 18; return ERC20(_token).decimals(); } } contract OasisTradeWrapper is DSMath, ExchangeInterfaceV2, AdminAuth { using SafeERC20 for ERC20; address public constant OTC_ADDRESS = 0x794e6e91555438aFc3ccF1c5076A74F42133d08D; address public constant WETH_ADDRESS = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; /// @notice Sells a _srcAmount of tokens at Oasis /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Destination amount function sell(address _srcAddr, address _destAddr, uint _srcAmount) external override payable returns (uint) { address srcAddr = ethToWethAddr(_srcAddr); address destAddr = ethToWethAddr(_destAddr); ERC20(srcAddr).safeApprove(OTC_ADDRESS, _srcAmount); uint destAmount = OasisInterface(OTC_ADDRESS).sellAllAmount(srcAddr, _srcAmount, destAddr, 0); // convert weth -> eth and send back if (destAddr == WETH_ADDRESS) { TokenInterface(WETH_ADDRESS).withdraw(destAmount); msg.sender.transfer(destAmount); } else { ERC20(destAddr).safeTransfer(msg.sender, destAmount); } return destAmount; } /// @notice Buys a _destAmount of tokens at Oasis /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint srcAmount function buy(address _srcAddr, address _destAddr, uint _destAmount) external override payable returns(uint) { address srcAddr = ethToWethAddr(_srcAddr); address destAddr = ethToWethAddr(_destAddr); ERC20(srcAddr).safeApprove(OTC_ADDRESS, uint(-1)); uint srcAmount = OasisInterface(OTC_ADDRESS).buyAllAmount(destAddr, _destAmount, srcAddr, uint(-1)); // convert weth -> eth and send back if (destAddr == WETH_ADDRESS) { TokenInterface(WETH_ADDRESS).withdraw(_destAmount); msg.sender.transfer(_destAmount); } else { ERC20(destAddr).safeTransfer(msg.sender, _destAmount); } // Send the leftover from the source token back sendLeftOver(srcAddr); return srcAmount; } /// @notice Return a rate for which we can sell an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Rate function getSellRate(address _srcAddr, address _destAddr, uint _srcAmount) public override view returns (uint) { address srcAddr = ethToWethAddr(_srcAddr); address destAddr = ethToWethAddr(_destAddr); return wdiv(OasisInterface(OTC_ADDRESS).getBuyAmount(destAddr, srcAddr, _srcAmount), _srcAmount); } /// @notice Return a rate for which we can buy an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint Rate function getBuyRate(address _srcAddr, address _destAddr, uint _destAmount) public override view returns (uint) { address srcAddr = ethToWethAddr(_srcAddr); address destAddr = ethToWethAddr(_destAddr); return wdiv(1 ether, wdiv(OasisInterface(OTC_ADDRESS).getPayAmount(srcAddr, destAddr, _destAmount), _destAmount)); } /// @notice Send any leftover tokens, we use to clear out srcTokens after buy /// @param _srcAddr Source token address function sendLeftOver(address _srcAddr) internal { msg.sender.transfer(address(this).balance); if (_srcAddr != KYBER_ETH_ADDRESS) { ERC20(_srcAddr).safeTransfer(msg.sender, ERC20(_srcAddr).balanceOf(address(this))); } } /// @notice Converts Kybers Eth address -> Weth /// @param _src Input address function ethToWethAddr(address _src) internal pure returns (address) { return _src == KYBER_ETH_ADDRESS ? WETH_ADDRESS : _src; } receive() payable external {} } contract UniswapV2Wrapper is DSMath, ExchangeInterfaceV2, AdminAuth { address public constant WETH_ADDRESS = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; UniswapRouterInterface public constant router = UniswapRouterInterface(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D); using SafeERC20 for ERC20; /// @notice Sells a _srcAmount of tokens at UniswapV2 /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Destination amount function sell(address _srcAddr, address _destAddr, uint _srcAmount) external payable override returns (uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); uint[] memory amounts; address[] memory path = new address[](2); path[0] = _srcAddr; path[1] = _destAddr; ERC20(_srcAddr).safeApprove(address(router), _srcAmount); // if we are buying ether if (_destAddr == WETH_ADDRESS) { amounts = router.swapExactTokensForETH(_srcAmount, 1, path, msg.sender, block.timestamp + 1); } // if we are selling token to token else { amounts = router.swapExactTokensForTokens(_srcAmount, 1, path, msg.sender, block.timestamp + 1); } return amounts[amounts.length - 1]; } /// @notice Buys a _destAmount of tokens at UniswapV2 /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint srcAmount function buy(address _srcAddr, address _destAddr, uint _destAmount) external override payable returns(uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); uint[] memory amounts; address[] memory path = new address[](2); path[0] = _srcAddr; path[1] = _destAddr; ERC20(_srcAddr).safeApprove(address(router), uint(-1)); // if we are buying ether if (_destAddr == WETH_ADDRESS) { amounts = router.swapTokensForExactETH(_destAmount, uint(-1), path, msg.sender, block.timestamp + 1); } // if we are buying token to token else { amounts = router.swapTokensForExactTokens(_destAmount, uint(-1), path, msg.sender, block.timestamp + 1); } // Send the leftover from the source token back sendLeftOver(_srcAddr); return amounts[0]; } /// @notice Return a rate for which we can sell an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Rate function getSellRate(address _srcAddr, address _destAddr, uint _srcAmount) public override view returns (uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); address[] memory path = new address[](2); path[0] = _srcAddr; path[1] = _destAddr; uint[] memory amounts = router.getAmountsOut(_srcAmount, path); return wdiv(amounts[amounts.length - 1], _srcAmount); } /// @notice Return a rate for which we can buy an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint Rate function getBuyRate(address _srcAddr, address _destAddr, uint _destAmount) public override view returns (uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); address[] memory path = new address[](2); path[0] = _srcAddr; path[1] = _destAddr; uint[] memory amounts = router.getAmountsIn(_destAmount, path); return wdiv(_destAmount, amounts[0]); } /// @notice Send any leftover tokens, we use to clear out srcTokens after buy /// @param _srcAddr Source token address function sendLeftOver(address _srcAddr) internal { msg.sender.transfer(address(this).balance); if (_srcAddr != KYBER_ETH_ADDRESS) { ERC20(_srcAddr).safeTransfer(msg.sender, ERC20(_srcAddr).balanceOf(address(this))); } } /// @notice Converts Kybers Eth address -> Weth /// @param _src Input address function ethToWethAddr(address _src) internal pure returns (address) { return _src == KYBER_ETH_ADDRESS ? WETH_ADDRESS : _src; } function getDecimals(address _token) internal view returns (uint256) { if (_token == KYBER_ETH_ADDRESS) return 18; return ERC20(_token).decimals(); } receive() payable external {} } contract UniswapWrapper is DSMath, ExchangeInterfaceV2, AdminAuth { address public constant WETH_ADDRESS = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address public constant KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant UNISWAP_FACTORY = 0xc0a47dFe034B400B47bDaD5FecDa2621de6c4d95; using SafeERC20 for ERC20; /// @notice Sells a _srcAmount of tokens at Uniswap /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Destination amount function sell(address _srcAddr, address _destAddr, uint _srcAmount) external payable override returns (uint) { address uniswapExchangeAddr; uint destAmount; _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); // if we are buying ether if (_destAddr == WETH_ADDRESS) { uniswapExchangeAddr = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr); ERC20(_srcAddr).safeApprove(uniswapExchangeAddr, _srcAmount); destAmount = UniswapExchangeInterface(uniswapExchangeAddr). tokenToEthTransferInput(_srcAmount, 1, block.timestamp + 1, msg.sender); } // if we are selling token to token else { uniswapExchangeAddr = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr); ERC20(_srcAddr).safeApprove(uniswapExchangeAddr, _srcAmount); destAmount = UniswapExchangeInterface(uniswapExchangeAddr). tokenToTokenTransferInput(_srcAmount, 1, 1, block.timestamp + 1, msg.sender, _destAddr); } return destAmount; } /// @notice Buys a _destAmount of tokens at Uniswap /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint srcAmount function buy(address _srcAddr, address _destAddr, uint _destAmount) external override payable returns(uint) { address uniswapExchangeAddr; uint srcAmount; _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); // if we are buying ether if (_destAddr == WETH_ADDRESS) { uniswapExchangeAddr = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr); ERC20(_srcAddr).safeApprove(uniswapExchangeAddr, uint(-1)); srcAmount = UniswapExchangeInterface(uniswapExchangeAddr). tokenToEthTransferOutput(_destAmount, uint(-1), block.timestamp + 1, msg.sender); } // if we are buying token to token else { uniswapExchangeAddr = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr); ERC20(_srcAddr).safeApprove(uniswapExchangeAddr, uint(-1)); srcAmount = UniswapExchangeInterface(uniswapExchangeAddr). tokenToTokenTransferOutput(_destAmount, uint(-1), uint(-1), block.timestamp + 1, msg.sender, _destAddr); } // Send the leftover from the source token back sendLeftOver(_srcAddr); return srcAmount; } /// @notice Return a rate for which we can sell an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _srcAmount From amount /// @return uint Rate function getSellRate(address _srcAddr, address _destAddr, uint _srcAmount) public override view returns (uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); if(_srcAddr == WETH_ADDRESS) { address uniswapTokenAddress = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_destAddr); return wdiv(UniswapExchangeInterface(uniswapTokenAddress).getEthToTokenInputPrice(_srcAmount), _srcAmount); } else if (_destAddr == WETH_ADDRESS) { address uniswapTokenAddress = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr); return wdiv(UniswapExchangeInterface(uniswapTokenAddress).getTokenToEthInputPrice(_srcAmount), _srcAmount); } else { uint ethBought = UniswapExchangeInterface(UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr)).getTokenToEthInputPrice(_srcAmount); return wdiv(UniswapExchangeInterface(UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_destAddr)).getEthToTokenInputPrice(ethBought), _srcAmount); } } /// @notice Return a rate for which we can buy an amount of tokens /// @param _srcAddr From token /// @param _destAddr To token /// @param _destAmount To amount /// @return uint Rate function getBuyRate(address _srcAddr, address _destAddr, uint _destAmount) public override view returns (uint) { _srcAddr = ethToWethAddr(_srcAddr); _destAddr = ethToWethAddr(_destAddr); if(_srcAddr == WETH_ADDRESS) { address uniswapTokenAddress = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_destAddr); return wdiv(1 ether, wdiv(UniswapExchangeInterface(uniswapTokenAddress).getEthToTokenOutputPrice(_destAmount), _destAmount)); } else if (_destAddr == WETH_ADDRESS) { address uniswapTokenAddress = UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr); return wdiv(1 ether, wdiv(UniswapExchangeInterface(uniswapTokenAddress).getTokenToEthOutputPrice(_destAmount), _destAmount)); } else { uint ethNeeded = UniswapExchangeInterface(UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_destAddr)).getTokenToEthOutputPrice(_destAmount); return wdiv(1 ether, wdiv(UniswapExchangeInterface(UniswapFactoryInterface(UNISWAP_FACTORY).getExchange(_srcAddr)).getEthToTokenOutputPrice(ethNeeded), _destAmount)); } } /// @notice Send any leftover tokens, we use to clear out srcTokens after buy /// @param _srcAddr Source token address function sendLeftOver(address _srcAddr) internal { msg.sender.transfer(address(this).balance); if (_srcAddr != KYBER_ETH_ADDRESS) { ERC20(_srcAddr).safeTransfer(msg.sender, ERC20(_srcAddr).balanceOf(address(this))); } } /// @notice Converts Kybers Eth address -> Weth /// @param _src Input address function ethToWethAddr(address _src) internal pure returns (address) { return _src == KYBER_ETH_ADDRESS ? WETH_ADDRESS : _src; } receive() payable external {} } contract DyDxFlashLoanTaker is DydxFlashLoanBase, ProxyPermission { address public constant WETH_ADDR = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; /// @notice Takes flash loan for _receiver /// @dev Receiver must send back WETH + 2 wei after executing transaction /// @dev Method is meant to be called from proxy and proxy will give authorization to _receiver /// @param _receiver Address of funds receiver /// @param _ethAmount ETH amount that needs to be pulled from dydx /// @param _encodedData Bytes with packed data function takeLoan(address _receiver, uint256 _ethAmount, bytes memory _encodedData) public { ISoloMargin solo = ISoloMargin(SOLO_MARGIN_ADDRESS); // Get marketId from token address uint256 marketId = _getMarketIdFromTokenAddress(WETH_ADDR); // Calculate repay amount (_amount + (2 wei)) // Approve transfer from uint256 repayAmount = _getRepaymentAmountInternal(_ethAmount); ERC20(WETH_ADDR).approve(SOLO_MARGIN_ADDRESS, repayAmount); Actions.ActionArgs[] memory operations = new Actions.ActionArgs[](3); operations[0] = _getWithdrawAction(marketId, _ethAmount, _receiver); operations[1] = _getCallAction( _encodedData, _receiver ); operations[2] = _getDepositAction(marketId, repayAmount, address(this)); Account.Info[] memory accountInfos = new Account.Info[](1); accountInfos[0] = _getAccountInfo(); givePermission(_receiver); solo.operate(accountInfos, operations); removePermission(_receiver); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "DyDxFlashLoanTaken", abi.encode(_receiver, _ethAmount, _encodedData)); } } abstract contract CTokenInterface is ERC20 { function mint(uint256 mintAmount) external virtual returns (uint256); // function mint() external virtual payable; function accrueInterest() public virtual returns (uint); function redeem(uint256 redeemTokens) external virtual returns (uint256); function redeemUnderlying(uint256 redeemAmount) external virtual returns (uint256); function borrow(uint256 borrowAmount) external virtual returns (uint256); function repayBorrow(uint256 repayAmount) external virtual returns (uint256); function repayBorrow() external virtual payable; function repayBorrowBehalf(address borrower, uint256 repayAmount) external virtual returns (uint256); function repayBorrowBehalf(address borrower) external virtual payable; function liquidateBorrow(address borrower, uint256 repayAmount, address cTokenCollateral) external virtual returns (uint256); function liquidateBorrow(address borrower, address cTokenCollateral) external virtual payable; function exchangeRateCurrent() external virtual returns (uint256); function supplyRatePerBlock() external virtual returns (uint256); function borrowRatePerBlock() external virtual returns (uint256); function totalReserves() external virtual returns (uint256); function reserveFactorMantissa() external virtual returns (uint256); function borrowBalanceCurrent(address account) external virtual returns (uint256); function totalBorrowsCurrent() external virtual returns (uint256); function getCash() external virtual returns (uint256); function balanceOfUnderlying(address owner) external virtual returns (uint256); function underlying() external virtual returns (address); function getAccountSnapshot(address account) external virtual view returns (uint, uint, uint, uint); } abstract contract ISubscriptionsV2 is StaticV2 { function getOwner(uint _cdpId) external view virtual returns(address); function getSubscribedInfo(uint _cdpId) public view virtual returns(bool, uint128, uint128, uint128, uint128, address, uint coll, uint debt); function getCdpHolder(uint _cdpId) public view virtual returns (bool subscribed, CdpHolder memory); } contract MCDMonitorV2 is DSMath, AdminAuth, GasBurner, StaticV2 { uint public REPAY_GAS_TOKEN = 25; uint public BOOST_GAS_TOKEN = 25; uint public MAX_GAS_PRICE = 200000000000; // 200 gwei uint public REPAY_GAS_COST = 2500000; uint public BOOST_GAS_COST = 2500000; MCDMonitorProxyV2 public monitorProxyContract; ISubscriptionsV2 public subscriptionsContract; address public mcdSaverTakerAddress; address public constant BOT_REGISTRY_ADDRESS = 0x637726f8b08a7ABE3aE3aCaB01A80E2d8ddeF77B; Manager public manager = Manager(0x5ef30b9986345249bc32d8928B7ee64DE9435E39); Vat public vat = Vat(0x35D1b3F3D7966A1DFe207aa4514C12a259A0492B); Spotter public spotter = Spotter(0x65C79fcB50Ca1594B025960e539eD7A9a6D434A3); DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); modifier onlyApproved() { require(BotRegistry(BOT_REGISTRY_ADDRESS).botList(msg.sender), "Not auth bot"); _; } constructor(address _monitorProxy, address _subscriptions, address _mcdSaverTakerAddress) public { monitorProxyContract = MCDMonitorProxyV2(_monitorProxy); subscriptionsContract = ISubscriptionsV2(_subscriptions); mcdSaverTakerAddress = _mcdSaverTakerAddress; } /// @notice Bots call this method to repay for user when conditions are met /// @dev If the contract ownes gas token it will try and use it for gas price reduction function repayFor( SaverExchangeCore.ExchangeData memory _exchangeData, uint _cdpId, uint _nextPrice, address _joinAddr ) public payable onlyApproved burnGas(REPAY_GAS_TOKEN) { (bool isAllowed, uint ratioBefore) = canCall(Method.Repay, _cdpId, _nextPrice); require(isAllowed); uint gasCost = calcGasCost(REPAY_GAS_COST); address owner = subscriptionsContract.getOwner(_cdpId); monitorProxyContract.callExecute{value: msg.value}( owner, mcdSaverTakerAddress, abi.encodeWithSignature( "repayWithLoan((address,address,uint256,uint256,uint256,address,address,bytes,uint256),uint256,uint256,address)", _exchangeData, _cdpId, gasCost, _joinAddr)); (bool isGoodRatio, uint ratioAfter) = ratioGoodAfter(Method.Repay, _cdpId, _nextPrice); require(isGoodRatio); returnEth(); logger.Log(address(this), owner, "AutomaticMCDRepay", abi.encode(ratioBefore, ratioAfter)); } /// @notice Bots call this method to boost for user when conditions are met /// @dev If the contract ownes gas token it will try and use it for gas price reduction function boostFor( SaverExchangeCore.ExchangeData memory _exchangeData, uint _cdpId, uint _nextPrice, address _joinAddr ) public payable onlyApproved burnGas(BOOST_GAS_TOKEN) { (bool isAllowed, uint ratioBefore) = canCall(Method.Boost, _cdpId, _nextPrice); require(isAllowed); uint gasCost = calcGasCost(BOOST_GAS_COST); address owner = subscriptionsContract.getOwner(_cdpId); monitorProxyContract.callExecute{value: msg.value}( owner, mcdSaverTakerAddress, abi.encodeWithSignature( "boostWithLoan((address,address,uint256,uint256,uint256,address,address,bytes,uint256),uint256,uint256,address)", _exchangeData, _cdpId, gasCost, _joinAddr)); (bool isGoodRatio, uint ratioAfter) = ratioGoodAfter(Method.Boost, _cdpId, _nextPrice); require(isGoodRatio); returnEth(); logger.Log(address(this), owner, "AutomaticMCDBoost", abi.encode(ratioBefore, ratioAfter)); } /******************* INTERNAL METHODS ********************************/ function returnEth() internal { // return if some eth left if (address(this).balance > 0) { msg.sender.transfer(address(this).balance); } } /******************* STATIC METHODS ********************************/ /// @notice Returns an address that owns the CDP /// @param _cdpId Id of the CDP function getOwner(uint _cdpId) public view returns(address) { return manager.owns(_cdpId); } /// @notice Gets CDP info (collateral, debt) /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP function getCdpInfo(uint _cdpId, bytes32 _ilk) public view returns (uint, uint) { address urn = manager.urns(_cdpId); (uint collateral, uint debt) = vat.urns(_ilk, urn); (,uint rate,,,) = vat.ilks(_ilk); return (collateral, rmul(debt, rate)); } /// @notice Gets a price of the asset /// @param _ilk Ilk of the CDP function getPrice(bytes32 _ilk) public view returns (uint) { (, uint mat) = spotter.ilks(_ilk); (,,uint spot,,) = vat.ilks(_ilk); return rmul(rmul(spot, spotter.par()), mat); } /// @notice Gets CDP ratio /// @param _cdpId Id of the CDP /// @param _nextPrice Next price for user function getRatio(uint _cdpId, uint _nextPrice) public view returns (uint) { bytes32 ilk = manager.ilks(_cdpId); uint price = (_nextPrice == 0) ? getPrice(ilk) : _nextPrice; (uint collateral, uint debt) = getCdpInfo(_cdpId, ilk); if (debt == 0) return 0; return rdiv(wmul(collateral, price), debt) / (10 ** 18); } /// @notice Checks if Boost/Repay could be triggered for the CDP /// @dev Called by MCDMonitor to enforce the min/max check function canCall(Method _method, uint _cdpId, uint _nextPrice) public view returns(bool, uint) { bool subscribed; CdpHolder memory holder; (subscribed, holder) = subscriptionsContract.getCdpHolder(_cdpId); // check if cdp is subscribed if (!subscribed) return (false, 0); // check if using next price is allowed if (_nextPrice > 0 && !holder.nextPriceEnabled) return (false, 0); // check if boost and boost allowed if (_method == Method.Boost && !holder.boostEnabled) return (false, 0); // check if owner is still owner if (getOwner(_cdpId) != holder.owner) return (false, 0); uint currRatio = getRatio(_cdpId, _nextPrice); if (_method == Method.Repay) { return (currRatio < holder.minRatio, currRatio); } else if (_method == Method.Boost) { return (currRatio > holder.maxRatio, currRatio); } } /// @dev After the Boost/Repay check if the ratio doesn't trigger another call function ratioGoodAfter(Method _method, uint _cdpId, uint _nextPrice) public view returns(bool, uint) { CdpHolder memory holder; (, holder) = subscriptionsContract.getCdpHolder(_cdpId); uint currRatio = getRatio(_cdpId, _nextPrice); if (_method == Method.Repay) { return (currRatio < holder.maxRatio, currRatio); } else if (_method == Method.Boost) { return (currRatio > holder.minRatio, currRatio); } } /// @notice Calculates gas cost (in Eth) of tx /// @dev Gas price is limited to MAX_GAS_PRICE to prevent attack of draining user CDP /// @param _gasAmount Amount of gas used for the tx function calcGasCost(uint _gasAmount) public view returns (uint) { uint gasPrice = tx.gasprice <= MAX_GAS_PRICE ? tx.gasprice : MAX_GAS_PRICE; return mul(gasPrice, _gasAmount); } /******************* OWNER ONLY OPERATIONS ********************************/ /// @notice Allows owner to change gas cost for boost operation, but only up to 3 millions /// @param _gasCost New gas cost for boost method function changeBoostGasCost(uint _gasCost) public onlyOwner { require(_gasCost < 3000000); BOOST_GAS_COST = _gasCost; } /// @notice Allows owner to change gas cost for repay operation, but only up to 3 millions /// @param _gasCost New gas cost for repay method function changeRepayGasCost(uint _gasCost) public onlyOwner { require(_gasCost < 3000000); REPAY_GAS_COST = _gasCost; } /// @notice Allows owner to change max gas price /// @param _maxGasPrice New max gas price function changeMaxGasPrice(uint _maxGasPrice) public onlyOwner { require(_maxGasPrice < 500000000000); MAX_GAS_PRICE = _maxGasPrice; } /// @notice Allows owner to change the amount of gas token burned per function call /// @param _gasAmount Amount of gas token /// @param _isRepay Flag to know for which function we are setting the gas token amount function changeGasTokenAmount(uint _gasAmount, bool _isRepay) public onlyOwner { if (_isRepay) { REPAY_GAS_TOKEN = _gasAmount; } else { BOOST_GAS_TOKEN = _gasAmount; } } } contract MCDCloseFlashLoan is SaverExchangeCore, MCDSaverProxyHelper, FlashLoanReceiverBase, AdminAuth { ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); uint public constant SERVICE_FEE = 400; // 0.25% Fee bytes32 internal constant ETH_ILK = 0x4554482d41000000000000000000000000000000000000000000000000000000; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; address public constant DAI_JOIN_ADDRESS = 0x9759A6Ac90977b93B58547b4A71c78317f391A28; address public constant ETH_JOIN_ADDRESS = 0x2F0b23f53734252Bda2277357e97e1517d6B042A; address public constant SPOTTER_ADDRESS = 0x65C79fcB50Ca1594B025960e539eD7A9a6D434A3; address public constant VAT_ADDRESS = 0x35D1b3F3D7966A1DFe207aa4514C12a259A0492B; Manager public constant manager = Manager(0x5ef30b9986345249bc32d8928B7ee64DE9435E39); DaiJoin public constant daiJoin = DaiJoin(DAI_JOIN_ADDRESS); Spotter public constant spotter = Spotter(SPOTTER_ADDRESS); Vat public constant vat = Vat(VAT_ADDRESS); struct CloseData { uint cdpId; uint collAmount; uint daiAmount; uint minAccepted; address joinAddr; address proxy; uint flFee; bool toDai; address reserve; uint amount; } constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public {} function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { ( uint[8] memory numData, address[5] memory addrData, bytes memory callData, address proxy, bool toDai ) = abi.decode(_params, (uint256[8],address[5],bytes,address,bool)); ExchangeData memory exchangeData = ExchangeData({ srcAddr: addrData[0], destAddr: addrData[1], srcAmount: numData[4], destAmount: numData[5], minPrice: numData[6], wrapper: addrData[3], exchangeAddr: addrData[2], callData: callData, price0x: numData[7] }); CloseData memory closeData = CloseData({ cdpId: numData[0], collAmount: numData[1], daiAmount: numData[2], minAccepted: numData[3], joinAddr: addrData[4], proxy: proxy, flFee: _fee, toDai: toDai, reserve: _reserve, amount: _amount }); address user = DSProxy(payable(closeData.proxy)).owner(); closeCDP(closeData, exchangeData, user); } function closeCDP( CloseData memory _closeData, ExchangeData memory _exchangeData, address _user ) internal { paybackDebt(_closeData.cdpId, manager.ilks(_closeData.cdpId), _closeData.daiAmount); // payback whole debt drawMaxCollateral(_closeData.cdpId, _closeData.joinAddr, _closeData.collAmount); // draw whole collateral uint daiSwaped = 0; uint dfsFee = 0; if (_closeData.toDai) { _exchangeData.srcAmount = _closeData.collAmount; (, daiSwaped) = _sell(_exchangeData); dfsFee = getFee(daiSwaped, _user); } else { dfsFee = getFee(_closeData.daiAmount, _user); _exchangeData.destAmount = (_closeData.daiAmount + _closeData.flFee + dfsFee); (, daiSwaped) = _buy(_exchangeData); } takeFee(dfsFee); address tokenAddr = getVaultCollAddr(_closeData.joinAddr); if (_closeData.toDai) { tokenAddr = DAI_ADDRESS; } require(getBalance(tokenAddr) >= _closeData.minAccepted, "Below min. number of eth specified"); transferFundsBackToPoolInternal(_closeData.reserve, _closeData.amount.add(_closeData.flFee)); sendLeftover(tokenAddr, DAI_ADDRESS, payable(_user)); } function drawMaxCollateral(uint _cdpId, address _joinAddr, uint _amount) internal returns (uint) { manager.frob(_cdpId, -toPositiveInt(_amount), 0); manager.flux(_cdpId, address(this), _amount); uint joinAmount = _amount; if (Join(_joinAddr).dec() != 18) { joinAmount = _amount / (10 ** (18 - Join(_joinAddr).dec())); } Join(_joinAddr).exit(address(this), joinAmount); if (_joinAddr == ETH_JOIN_ADDRESS) { Join(_joinAddr).gem().withdraw(joinAmount); // Weth -> Eth } return joinAmount; } function paybackDebt(uint _cdpId, bytes32 _ilk, uint _daiAmount) internal { address urn = manager.urns(_cdpId); daiJoin.dai().approve(DAI_JOIN_ADDRESS, _daiAmount); daiJoin.join(urn, _daiAmount); manager.frob(_cdpId, 0, normalizePaybackAmount(VAT_ADDRESS, urn, _ilk)); } function takeFee(uint _feeAmount) internal returns (uint) { ERC20(DAI_ADDRESS).transfer(WALLET_ID, _feeAmount); } function getFee(uint _amount, address _owner) internal view returns (uint feeAmount) { uint fee = SERVICE_FEE; if (Discount(DISCOUNT_ADDRESS).isCustomFeeSet(_owner)) { fee = Discount(DISCOUNT_ADDRESS).getCustomServiceFee(_owner); } feeAmount = (fee == 0) ? 0 : (_amount / fee); // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } } function getVaultCollAddr(address _joinAddr) internal view returns (address) { address tokenAddr = address(Join(_joinAddr).gem()); if (tokenAddr == WETH_ADDRESS) { return KYBER_ETH_ADDRESS; } return tokenAddr; } function getPrice(bytes32 _ilk) public view returns (uint256) { (, uint256 mat) = spotter.ilks(_ilk); (, , uint256 spot, , ) = vat.ilks(_ilk); return rmul(rmul(spot, spotter.par()), mat); } receive() external override(FlashLoanReceiverBase, SaverExchangeCore) payable {} } contract MCDCloseTaker is MCDSaverProxyHelper { address public constant SUBSCRIPTION_ADDRESS_NEW = 0xC45d4f6B6bf41b6EdAA58B01c4298B8d9078269a; address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); // solhint-disable-next-line const-name-snakecase Manager public constant manager = Manager(0x5ef30b9986345249bc32d8928B7ee64DE9435E39); address public constant SPOTTER_ADDRESS = 0x65C79fcB50Ca1594B025960e539eD7A9a6D434A3; address public constant VAT_ADDRESS = 0x35D1b3F3D7966A1DFe207aa4514C12a259A0492B; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; // solhint-disable-next-line const-name-snakecase DefisaverLogger public constant logger = DefisaverLogger(DEFISAVER_LOGGER); struct CloseData { uint cdpId; address joinAddr; uint collAmount; uint daiAmount; uint minAccepted; bool wholeDebt; bool toDai; } Vat public constant vat = Vat(VAT_ADDRESS); Spotter public constant spotter = Spotter(SPOTTER_ADDRESS); function closeWithLoan( SaverExchangeCore.ExchangeData memory _exchangeData, CloseData memory _closeData, address payable mcdCloseFlashLoan ) public payable { mcdCloseFlashLoan.transfer(msg.value); // 0x fee if (_closeData.wholeDebt) { _closeData.daiAmount = getAllDebt( VAT_ADDRESS, manager.urns(_closeData.cdpId), manager.urns(_closeData.cdpId), manager.ilks(_closeData.cdpId) ); (_closeData.collAmount, ) = getCdpInfo(manager, _closeData.cdpId, manager.ilks(_closeData.cdpId)); } manager.cdpAllow(_closeData.cdpId, mcdCloseFlashLoan, 1); (uint[8] memory numData, address[5] memory addrData, bytes memory callData) = _packData(_closeData, _exchangeData); bytes memory paramsData = abi.encode(numData, addrData, callData, address(this), _closeData.toDai); lendingPool.flashLoan(mcdCloseFlashLoan, DAI_ADDRESS, _closeData.daiAmount, paramsData); manager.cdpAllow(_closeData.cdpId, mcdCloseFlashLoan, 0); // If sub. to automatic protection unsubscribe unsubscribe(SUBSCRIPTION_ADDRESS_NEW, _closeData.cdpId); logger.Log(address(this), msg.sender, "MCDClose", abi.encode(_closeData.cdpId, _closeData.collAmount, _closeData.daiAmount, _closeData.toDai)); } /// @notice Gets the maximum amount of debt available to generate /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP function getMaxDebt(uint256 _cdpId, bytes32 _ilk) public view returns (uint256) { uint256 price = getPrice(_ilk); (, uint256 mat) = spotter.ilks(_ilk); (uint256 collateral, uint256 debt) = getCdpInfo(manager, _cdpId, _ilk); return sub(wdiv(wmul(collateral, price), mat), debt); } /// @notice Gets a price of the asset /// @param _ilk Ilk of the CDP function getPrice(bytes32 _ilk) public view returns (uint256) { (, uint256 mat) = spotter.ilks(_ilk); (, , uint256 spot, , ) = vat.ilks(_ilk); return rmul(rmul(spot, spotter.par()), mat); } function unsubscribe(address _subContract, uint _cdpId) internal { (, bool isSubscribed) = IMCDSubscriptions(_subContract).subscribersPos(_cdpId); if (isSubscribed) { IMCDSubscriptions(_subContract).unsubscribe(_cdpId); } } function _packData( CloseData memory _closeData, SaverExchangeCore.ExchangeData memory exchangeData ) internal pure returns (uint[8] memory numData, address[5] memory addrData, bytes memory callData) { numData = [ _closeData.cdpId, _closeData.collAmount, _closeData.daiAmount, _closeData.minAccepted, exchangeData.srcAmount, exchangeData.destAmount, exchangeData.minPrice, exchangeData.price0x ]; addrData = [ exchangeData.srcAddr, exchangeData.destAddr, exchangeData.exchangeAddr, exchangeData.wrapper, _closeData.joinAddr ]; callData = exchangeData.callData; } } contract MCDCreateFlashLoan is SaverExchangeCore, AdminAuth, FlashLoanReceiverBase { address public constant CREATE_PROXY_ACTIONS = 0x6d0984E80a86f26c0dd564ca0CF74a8E9Da03305; uint public constant SERVICE_FEE = 400; // 0.25% Fee address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); address public constant ETH_JOIN_ADDRESS = 0x2F0b23f53734252Bda2277357e97e1517d6B042A; address public constant DAI_JOIN_ADDRESS = 0x9759A6Ac90977b93B58547b4A71c78317f391A28; address public constant JUG_ADDRESS = 0x19c0976f590D67707E62397C87829d896Dc0f1F1; address public constant MANAGER_ADDRESS = 0x5ef30b9986345249bc32d8928B7ee64DE9435E39; constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public {} function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { //check the contract has the specified balance require(_amount <= getBalanceInternal(address(this), _reserve), "Invalid balance for the contract"); ( uint[6] memory numData, address[5] memory addrData, bytes memory callData, address proxy ) = abi.decode(_params, (uint256[6],address[5],bytes,address)); ExchangeData memory exchangeData = ExchangeData({ srcAddr: addrData[0], destAddr: addrData[1], srcAmount: numData[2], destAmount: numData[3], minPrice: numData[4], wrapper: addrData[3], exchangeAddr: addrData[2], callData: callData, price0x: numData[5] }); openAndLeverage(numData[0], numData[1] + _fee, addrData[4], proxy, exchangeData); transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } } function openAndLeverage( uint _collAmount, uint _daiAmountAndFee, address _joinAddr, address _proxy, ExchangeData memory _exchangeData ) public { uint dfsFee = getFee(_exchangeData.srcAmount, DSProxy(payable(_proxy)).owner()); _exchangeData.srcAmount = (_exchangeData.srcAmount - dfsFee); (, uint256 collSwaped) = _sell(_exchangeData); bytes32 ilk = Join(_joinAddr).ilk(); if (_joinAddr == ETH_JOIN_ADDRESS) { MCDCreateProxyActions(CREATE_PROXY_ACTIONS).openLockETHAndDraw{value: address(this).balance}( MANAGER_ADDRESS, JUG_ADDRESS, ETH_JOIN_ADDRESS, DAI_JOIN_ADDRESS, ilk, _daiAmountAndFee, _proxy ); } else { ERC20(address(Join(_joinAddr).gem())).safeApprove(CREATE_PROXY_ACTIONS, 0); ERC20(address(Join(_joinAddr).gem())).safeApprove(CREATE_PROXY_ACTIONS, uint256(-1)); MCDCreateProxyActions(CREATE_PROXY_ACTIONS).openLockGemAndDraw( MANAGER_ADDRESS, JUG_ADDRESS, _joinAddr, DAI_JOIN_ADDRESS, ilk, (_collAmount + collSwaped), _daiAmountAndFee, true, _proxy ); } } function getFee(uint _amount, address _owner) internal returns (uint feeAmount) { uint fee = SERVICE_FEE; if (Discount(DISCOUNT_ADDRESS).isCustomFeeSet(_owner)) { fee = Discount(DISCOUNT_ADDRESS).getCustomServiceFee(_owner); } feeAmount = (fee == 0) ? 0 : (_amount / fee); // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } ERC20(DAI_ADDRESS).transfer(WALLET_ID, feeAmount); } receive() external override(FlashLoanReceiverBase, SaverExchangeCore) payable {} } contract MCDSaverProxy is SaverExchangeCore, MCDSaverProxyHelper { uint public constant MANUAL_SERVICE_FEE = 400; // 0.25% Fee uint public constant AUTOMATIC_SERVICE_FEE = 333; // 0.3% Fee bytes32 public constant ETH_ILK = 0x4554482d41000000000000000000000000000000000000000000000000000000; address public constant MANAGER_ADDRESS = 0x5ef30b9986345249bc32d8928B7ee64DE9435E39; address public constant VAT_ADDRESS = 0x35D1b3F3D7966A1DFe207aa4514C12a259A0492B; address public constant SPOTTER_ADDRESS = 0x65C79fcB50Ca1594B025960e539eD7A9a6D434A3; address public constant DAI_JOIN_ADDRESS = 0x9759A6Ac90977b93B58547b4A71c78317f391A28; address public constant JUG_ADDRESS = 0x19c0976f590D67707E62397C87829d896Dc0f1F1; address public constant ETH_JOIN_ADDRESS = 0x2F0b23f53734252Bda2277357e97e1517d6B042A; address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; address public constant BOT_REGISTRY_ADDRESS = 0x637726f8b08a7ABE3aE3aCaB01A80E2d8ddeF77B; Manager public constant manager = Manager(MANAGER_ADDRESS); Vat public constant vat = Vat(VAT_ADDRESS); DaiJoin public constant daiJoin = DaiJoin(DAI_JOIN_ADDRESS); Spotter public constant spotter = Spotter(SPOTTER_ADDRESS); DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); /// @notice Repay - draws collateral, converts to Dai and repays the debt /// @dev Must be called by the DSProxy contract that owns the CDP function repay( SaverExchangeCore.ExchangeData memory _exchangeData, uint _cdpId, uint _gasCost, address _joinAddr ) public payable { address owner = getOwner(manager, _cdpId); bytes32 ilk = manager.ilks(_cdpId); drawCollateral(_cdpId, _joinAddr, _exchangeData.srcAmount); (, uint daiAmount) = _sell(_exchangeData); uint daiAfterFee = sub(daiAmount, getFee(daiAmount, _gasCost, owner)); paybackDebt(_cdpId, ilk, daiAfterFee, owner); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } logger.Log(address(this), msg.sender, "MCDRepay", abi.encode(_cdpId, owner, _exchangeData.srcAmount, daiAmount)); } /// @notice Boost - draws Dai, converts to collateral and adds to CDP /// @dev Must be called by the DSProxy contract that owns the CDP function boost( SaverExchangeCore.ExchangeData memory _exchangeData, uint _cdpId, uint _gasCost, address _joinAddr ) public payable { address owner = getOwner(manager, _cdpId); bytes32 ilk = manager.ilks(_cdpId); uint daiDrawn = drawDai(_cdpId, ilk, _exchangeData.srcAmount); uint daiAfterFee = sub(daiDrawn, getFee(daiDrawn, _gasCost, owner)); _exchangeData.srcAmount = daiAfterFee; (, uint swapedColl) = _sell(_exchangeData); addCollateral(_cdpId, _joinAddr, swapedColl); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } logger.Log(address(this), msg.sender, "MCDBoost", abi.encode(_cdpId, owner, _exchangeData.srcAmount, swapedColl)); } /// @notice Draws Dai from the CDP /// @dev If _daiAmount is bigger than max available we'll draw max /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP /// @param _daiAmount Amount of Dai to draw function drawDai(uint _cdpId, bytes32 _ilk, uint _daiAmount) internal returns (uint) { uint rate = Jug(JUG_ADDRESS).drip(_ilk); uint daiVatBalance = vat.dai(manager.urns(_cdpId)); uint maxAmount = getMaxDebt(_cdpId, _ilk); if (_daiAmount >= maxAmount) { _daiAmount = sub(maxAmount, 1); } manager.frob(_cdpId, int(0), normalizeDrawAmount(_daiAmount, rate, daiVatBalance)); manager.move(_cdpId, address(this), toRad(_daiAmount)); if (vat.can(address(this), address(DAI_JOIN_ADDRESS)) == 0) { vat.hope(DAI_JOIN_ADDRESS); } DaiJoin(DAI_JOIN_ADDRESS).exit(address(this), _daiAmount); return _daiAmount; } /// @notice Adds collateral to the CDP /// @param _cdpId Id of the CDP /// @param _joinAddr Address of the join contract for the CDP collateral /// @param _amount Amount of collateral to add function addCollateral(uint _cdpId, address _joinAddr, uint _amount) internal { int convertAmount = 0; if (_joinAddr == ETH_JOIN_ADDRESS) { Join(_joinAddr).gem().deposit{value: _amount}(); convertAmount = toPositiveInt(_amount); } else { convertAmount = toPositiveInt(convertTo18(_joinAddr, _amount)); } ERC20(address(Join(_joinAddr).gem())).safeApprove(_joinAddr, 0); ERC20(address(Join(_joinAddr).gem())).safeApprove(_joinAddr, _amount); Join(_joinAddr).join(address(this), _amount); vat.frob( manager.ilks(_cdpId), manager.urns(_cdpId), address(this), address(this), convertAmount, 0 ); } /// @notice Draws collateral and returns it to DSProxy /// @dev If _amount is bigger than max available we'll draw max /// @param _cdpId Id of the CDP /// @param _joinAddr Address of the join contract for the CDP collateral /// @param _amount Amount of collateral to draw function drawCollateral(uint _cdpId, address _joinAddr, uint _amount) internal returns (uint) { uint frobAmount = _amount; if (Join(_joinAddr).dec() != 18) { frobAmount = _amount * (10 ** (18 - Join(_joinAddr).dec())); } manager.frob(_cdpId, -toPositiveInt(frobAmount), 0); manager.flux(_cdpId, address(this), frobAmount); Join(_joinAddr).exit(address(this), _amount); if (_joinAddr == ETH_JOIN_ADDRESS) { Join(_joinAddr).gem().withdraw(_amount); // Weth -> Eth } return _amount; } /// @notice Paybacks Dai debt /// @dev If the _daiAmount is bigger than the whole debt, returns extra Dai /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP /// @param _daiAmount Amount of Dai to payback /// @param _owner Address that owns the DSProxy that owns the CDP function paybackDebt(uint _cdpId, bytes32 _ilk, uint _daiAmount, address _owner) internal { address urn = manager.urns(_cdpId); uint wholeDebt = getAllDebt(VAT_ADDRESS, urn, urn, _ilk); if (_daiAmount > wholeDebt) { ERC20(DAI_ADDRESS).transfer(_owner, sub(_daiAmount, wholeDebt)); _daiAmount = wholeDebt; } if (ERC20(DAI_ADDRESS).allowance(address(this), DAI_JOIN_ADDRESS) == 0) { ERC20(DAI_ADDRESS).approve(DAI_JOIN_ADDRESS, uint(-1)); } daiJoin.join(urn, _daiAmount); manager.frob(_cdpId, 0, normalizePaybackAmount(VAT_ADDRESS, urn, _ilk)); } /// @notice Calculates the fee amount /// @param _amount Dai amount that is converted /// @param _gasCost Used for Monitor, estimated gas cost of tx /// @param _owner The address that controlls the DSProxy that owns the CDP function getFee(uint _amount, uint _gasCost, address _owner) internal returns (uint feeAmount) { uint fee = MANUAL_SERVICE_FEE; if (BotRegistry(BOT_REGISTRY_ADDRESS).botList(tx.origin)) { fee = AUTOMATIC_SERVICE_FEE; } if (Discount(DISCOUNT_ADDRESS).isCustomFeeSet(_owner)) { fee = Discount(DISCOUNT_ADDRESS).getCustomServiceFee(_owner); } feeAmount = (fee == 0) ? 0 : (_amount / fee); if (_gasCost != 0) { uint ethDaiPrice = getPrice(ETH_ILK); _gasCost = rmul(_gasCost, ethDaiPrice); feeAmount = add(feeAmount, _gasCost); } // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } ERC20(DAI_ADDRESS).transfer(WALLET_ID, feeAmount); } /// @notice Gets the maximum amount of collateral available to draw /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP /// @param _joinAddr Joind address of collateral /// @dev Substracts 10 wei to aviod rounding error later on function getMaxCollateral(uint _cdpId, bytes32 _ilk, address _joinAddr) public view returns (uint) { uint price = getPrice(_ilk); (uint collateral, uint debt) = getCdpInfo(manager, _cdpId, _ilk); (, uint mat) = Spotter(SPOTTER_ADDRESS).ilks(_ilk); uint maxCollateral = sub(sub(collateral, (div(mul(mat, debt), price))), 10); uint normalizeMaxCollateral = maxCollateral; if (Join(_joinAddr).dec() != 18) { normalizeMaxCollateral = maxCollateral / (10 ** (18 - Join(_joinAddr).dec())); } return normalizeMaxCollateral; } /// @notice Gets the maximum amount of debt available to generate /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP /// @dev Substracts 10 wei to aviod rounding error later on function getMaxDebt(uint _cdpId, bytes32 _ilk) public virtual view returns (uint) { uint price = getPrice(_ilk); (, uint mat) = spotter.ilks(_ilk); (uint collateral, uint debt) = getCdpInfo(manager, _cdpId, _ilk); return sub(sub(div(mul(collateral, price), mat), debt), 10); } /// @notice Gets a price of the asset /// @param _ilk Ilk of the CDP function getPrice(bytes32 _ilk) public view returns (uint) { (, uint mat) = spotter.ilks(_ilk); (,,uint spot,,) = vat.ilks(_ilk); return rmul(rmul(spot, spotter.par()), mat); } /// @notice Gets CDP ratio /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP function getRatio(uint _cdpId, bytes32 _ilk) public view returns (uint) { uint price = getPrice( _ilk); (uint collateral, uint debt) = getCdpInfo(manager, _cdpId, _ilk); if (debt == 0) return 0; return rdiv(wmul(collateral, price), debt); } /// @notice Gets CDP info (collateral, debt, price, ilk) /// @param _cdpId Id of the CDP function getCdpDetailedInfo(uint _cdpId) public view returns (uint collateral, uint debt, uint price, bytes32 ilk) { address urn = manager.urns(_cdpId); ilk = manager.ilks(_cdpId); (collateral, debt) = vat.urns(ilk, urn); (,uint rate,,,) = vat.ilks(ilk); debt = rmul(debt, rate); price = getPrice(ilk); } } contract MCDSaverTaker is MCDSaverProxy, GasBurner { address payable public constant MCD_SAVER_FLASH_LOAN = 0x28e444b53a9e7E3F6fFe50E93b18dCce7838551F; address public constant AAVE_POOL_CORE = 0x3dfd23A6c5E8BbcFc9581d2E864a68feb6a076d3; ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); function boostWithLoan( SaverExchangeCore.ExchangeData memory _exchangeData, uint _cdpId, uint _gasCost, address _joinAddr ) public payable burnGas(25) { uint256 maxDebt = getMaxDebt(_cdpId, manager.ilks(_cdpId)); if (maxDebt >= _exchangeData.srcAmount) { boost(_exchangeData, _cdpId, _gasCost, _joinAddr); return; } MCD_SAVER_FLASH_LOAN.transfer(msg.value); // 0x fee uint256 loanAmount = sub(_exchangeData.srcAmount, maxDebt); uint maxLiq = getAvailableLiquidity(DAI_JOIN_ADDRESS); loanAmount = loanAmount > maxLiq ? maxLiq : loanAmount; manager.cdpAllow(_cdpId, MCD_SAVER_FLASH_LOAN, 1); bytes memory paramsData = abi.encode(packExchangeData(_exchangeData), _cdpId, _gasCost, _joinAddr, false); lendingPool.flashLoan(MCD_SAVER_FLASH_LOAN, DAI_ADDRESS, loanAmount, paramsData); manager.cdpAllow(_cdpId, MCD_SAVER_FLASH_LOAN, 0); } function repayWithLoan( SaverExchangeCore.ExchangeData memory _exchangeData, uint _cdpId, uint _gasCost, address _joinAddr ) public payable burnGas(25) { uint256 maxColl = getMaxCollateral(_cdpId, manager.ilks(_cdpId), _joinAddr); if (maxColl >= _exchangeData.srcAmount) { repay(_exchangeData, _cdpId, _gasCost, _joinAddr); return; } MCD_SAVER_FLASH_LOAN.transfer(msg.value); // 0x fee uint256 loanAmount = sub(_exchangeData.srcAmount, maxColl); uint maxLiq = getAvailableLiquidity(_joinAddr); loanAmount = loanAmount > maxLiq ? maxLiq : loanAmount; manager.cdpAllow(_cdpId, MCD_SAVER_FLASH_LOAN, 1); bytes memory paramsData = abi.encode(packExchangeData(_exchangeData), _cdpId, _gasCost, _joinAddr, true); lendingPool.flashLoan(MCD_SAVER_FLASH_LOAN, getAaveCollAddr(_joinAddr), loanAmount, paramsData); manager.cdpAllow(_cdpId, MCD_SAVER_FLASH_LOAN, 0); } /// @notice Gets the maximum amount of debt available to generate /// @param _cdpId Id of the CDP /// @param _ilk Ilk of the CDP function getMaxDebt(uint256 _cdpId, bytes32 _ilk) public override view returns (uint256) { uint256 price = getPrice(_ilk); (, uint256 mat) = spotter.ilks(_ilk); (uint256 collateral, uint256 debt) = getCdpInfo(manager, _cdpId, _ilk); return sub(wdiv(wmul(collateral, price), mat), debt); } function getAaveCollAddr(address _joinAddr) internal view returns (address) { if (_joinAddr == 0x2F0b23f53734252Bda2277357e97e1517d6B042A || _joinAddr == 0x775787933e92b709f2a3C70aa87999696e74A9F8) { return KYBER_ETH_ADDRESS; } else if (_joinAddr == DAI_JOIN_ADDRESS) { return DAI_ADDRESS; } else { return getCollateralAddr(_joinAddr); } } function getAvailableLiquidity(address _joinAddr) internal view returns (uint liquidity) { address tokenAddr = getAaveCollAddr(_joinAddr); if (tokenAddr == KYBER_ETH_ADDRESS) { liquidity = AAVE_POOL_CORE.balance; } else { liquidity = ERC20(tokenAddr).balanceOf(AAVE_POOL_CORE); } } function _packData( uint _cdpId, uint _gasCost, address _joinAddr, SaverExchangeCore.ExchangeData memory exchangeData ) internal pure returns (uint[6] memory numData, address[5] memory addrData, bytes memory callData) { numData = [ exchangeData.srcAmount, exchangeData.destAmount, exchangeData.minPrice, exchangeData.price0x, _cdpId, _gasCost ]; addrData = [ exchangeData.srcAddr, exchangeData.destAddr, exchangeData.exchangeAddr, exchangeData.wrapper, _joinAddr ]; callData = exchangeData.callData; } } contract SavingsProxy is DSRSavingsProtocol, CompoundSavingsProtocol { address public constant ADAI_ADDRESS = 0xfC1E690f61EFd961294b3e1Ce3313fBD8aa4f85d; address public constant SAVINGS_DYDX_ADDRESS = 0x03b1565e070df392e48e7a8e01798C4B00E534A5; address public constant SAVINGS_AAVE_ADDRESS = 0x535B9035E9bA8D7efe0FeAEac885fb65b303E37C; address public constant NEW_IDAI_ADDRESS = 0x493C57C4763932315A328269E1ADaD09653B9081; address public constant COMP_ADDRESS = 0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B; address public constant SAVINGS_LOGGER_ADDRESS = 0x89b3635BD2bAD145C6f92E82C9e83f06D5654984; address public constant SOLO_MARGIN_ADDRESS = 0x1E0447b19BB6EcFdAe1e4AE1694b0C3659614e4e; enum SavingsProtocol {Compound, Dydx, Fulcrum, Dsr, Aave} function deposit(SavingsProtocol _protocol, uint256 _amount) public { if (_protocol == SavingsProtocol.Dsr) { dsrDeposit(_amount, true); } else if (_protocol == SavingsProtocol.Compound) { compDeposit(msg.sender, _amount); } else { _deposit(_protocol, _amount, true); } SavingsLogger(SAVINGS_LOGGER_ADDRESS).logDeposit(msg.sender, uint8(_protocol), _amount); } function withdraw(SavingsProtocol _protocol, uint256 _amount) public { if (_protocol == SavingsProtocol.Dsr) { dsrWithdraw(_amount, true); } else if (_protocol == SavingsProtocol.Compound) { compWithdraw(msg.sender, _amount); } else { _withdraw(_protocol, _amount, true); } SavingsLogger(SAVINGS_LOGGER_ADDRESS).logWithdraw(msg.sender, uint8(_protocol), _amount); } function swap(SavingsProtocol _from, SavingsProtocol _to, uint256 _amount) public { if (_from == SavingsProtocol.Dsr) { dsrWithdraw(_amount, false); } else if (_from == SavingsProtocol.Compound) { compWithdraw(msg.sender, _amount); } else { _withdraw(_from, _amount, false); } // possible to withdraw 1-2 wei less than actual amount due to division precision // so we deposit all amount on DSProxy uint256 amountToDeposit = ERC20(DAI_ADDRESS).balanceOf(address(this)); if (_to == SavingsProtocol.Dsr) { dsrDeposit(amountToDeposit, false); } else if (_from == SavingsProtocol.Compound) { compDeposit(msg.sender, _amount); } else { _deposit(_to, amountToDeposit, false); } SavingsLogger(SAVINGS_LOGGER_ADDRESS).logSwap( msg.sender, uint8(_from), uint8(_to), _amount ); } function withdrawDai() public { ERC20(DAI_ADDRESS).transfer(msg.sender, ERC20(DAI_ADDRESS).balanceOf(address(this))); } function claimComp() public { ComptrollerInterface(COMP_ADDRESS).claimComp(address(this)); } function getAddress(SavingsProtocol _protocol) public pure returns (address) { if (_protocol == SavingsProtocol.Dydx) { return SAVINGS_DYDX_ADDRESS; } if (_protocol == SavingsProtocol.Aave) { return SAVINGS_AAVE_ADDRESS; } } function _deposit(SavingsProtocol _protocol, uint256 _amount, bool _fromUser) internal { if (_fromUser) { ERC20(DAI_ADDRESS).transferFrom(msg.sender, address(this), _amount); } approveDeposit(_protocol); ProtocolInterface(getAddress(_protocol)).deposit(address(this), _amount); endAction(_protocol); } function _withdraw(SavingsProtocol _protocol, uint256 _amount, bool _toUser) public { approveWithdraw(_protocol); ProtocolInterface(getAddress(_protocol)).withdraw(address(this), _amount); endAction(_protocol); if (_toUser) { withdrawDai(); } } function endAction(SavingsProtocol _protocol) internal { if (_protocol == SavingsProtocol.Dydx) { setDydxOperator(false); } } function approveDeposit(SavingsProtocol _protocol) internal { if (_protocol == SavingsProtocol.Compound || _protocol == SavingsProtocol.Fulcrum || _protocol == SavingsProtocol.Aave) { ERC20(DAI_ADDRESS).approve(getAddress(_protocol), uint256(-1)); } if (_protocol == SavingsProtocol.Dydx) { ERC20(DAI_ADDRESS).approve(SOLO_MARGIN_ADDRESS, uint256(-1)); setDydxOperator(true); } } function approveWithdraw(SavingsProtocol _protocol) internal { if (_protocol == SavingsProtocol.Compound) { ERC20(NEW_CDAI_ADDRESS).approve(getAddress(_protocol), uint256(-1)); } if (_protocol == SavingsProtocol.Dydx) { setDydxOperator(true); } if (_protocol == SavingsProtocol.Fulcrum) { ERC20(NEW_IDAI_ADDRESS).approve(getAddress(_protocol), uint256(-1)); } if (_protocol == SavingsProtocol.Aave) { ERC20(ADAI_ADDRESS).approve(getAddress(_protocol), uint256(-1)); } } function setDydxOperator(bool _trusted) internal { ISoloMargin.OperatorArg[] memory operatorArgs = new ISoloMargin.OperatorArg[](1); operatorArgs[0] = ISoloMargin.OperatorArg({ operator: getAddress(SavingsProtocol.Dydx), trusted: _trusted }); ISoloMargin(SOLO_MARGIN_ADDRESS).setOperators(operatorArgs); } } contract LoanShifterReceiver is SaverExchangeCore, FlashLoanReceiverBase, AdminAuth { ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; ShifterRegistry public constant shifterRegistry = ShifterRegistry(0x2612Af3A521c2df9EAF28422Ca335b04AdF3ac66); struct ParamData { bytes proxyData1; bytes proxyData2; address proxy; address debtAddr; uint8 protocol1; uint8 protocol2; uint8 swapType; } constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public {} function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { // Format the call data for DSProxy (ParamData memory paramData, ExchangeData memory exchangeData) = packFunctionCall(_amount, _fee, _params); address protocolAddr1 = shifterRegistry.getAddr(getNameByProtocol(paramData.protocol1)); address protocolAddr2 = shifterRegistry.getAddr(getNameByProtocol(paramData.protocol2)); // Send Flash loan amount to DSProxy sendToProxy(payable(paramData.proxy), _reserve, _amount); // Execute the Close/Change debt operation DSProxyInterface(paramData.proxy).execute(protocolAddr1, paramData.proxyData1); if (paramData.swapType == 1) { // COLL_SWAP exchangeData.srcAmount = getBalance(exchangeData.srcAddr); (, uint amount) = _sell(exchangeData); sendToProxy(payable(paramData.proxy), exchangeData.destAddr, amount); } else if (paramData.swapType == 2) { // DEBT_SWAP exchangeData.destAmount = (_amount + _fee); _buy(exchangeData); // Send extra to DSProxy sendToProxy(payable(paramData.proxy), exchangeData.srcAddr, ERC20(exchangeData.srcAddr).balanceOf(address(this))); } else { // NO_SWAP just send tokens to proxy sendToProxy(payable(paramData.proxy), exchangeData.srcAddr, getBalance(exchangeData.srcAddr)); } // Execute the Open operation DSProxyInterface(paramData.proxy).execute(protocolAddr2, paramData.proxyData2); // Repay FL transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } } function packFunctionCall(uint _amount, uint _fee, bytes memory _params) internal pure returns (ParamData memory paramData, ExchangeData memory exchangeData) { ( uint[8] memory numData, // collAmount, debtAmount, id1, id2, srcAmount, destAmount, minPrice, price0x address[8] memory addrData, // addrLoan1, addrLoan2, debtAddr1, debtAddr2, srcAddr, destAddr, exchangeAddr, wrapper uint8[3] memory enumData, // fromProtocol, toProtocol, swapType bytes memory callData, address proxy ) = abi.decode(_params, (uint256[8],address[8],uint8[3],bytes,address)); bytes memory proxyData1; bytes memory proxyData2; uint openDebtAmount = (_amount + _fee); if (enumData[0] == 0) { // MAKER FROM proxyData1 = abi.encodeWithSignature("close(uint256,address,uint256,uint256)", numData[2], addrData[0], _amount, numData[0]); } else if(enumData[0] == 1) { // COMPOUND FROM if (enumData[2] == 2) { // DEBT_SWAP proxyData1 = abi.encodeWithSignature("changeDebt(address,address,uint256,uint256)", addrData[2], addrData[3], (_amount + _fee), numData[4]); } else { proxyData1 = abi.encodeWithSignature("close(address,address,uint256,uint256)", addrData[0], addrData[2], numData[0], numData[1]); } } if (enumData[1] == 0) { // MAKER TO proxyData2 = abi.encodeWithSignature("open(uint256,address,uint256)", numData[3], addrData[1], openDebtAmount); } else if(enumData[1] == 1) { // COMPOUND TO if (enumData[2] == 2) { // DEBT_SWAP proxyData2 = abi.encodeWithSignature("repayAll(address)", addrData[3]); } else { proxyData2 = abi.encodeWithSignature("open(address,address,uint256)", addrData[1], addrData[3], openDebtAmount); } } paramData = ParamData({ proxyData1: proxyData1, proxyData2: proxyData2, proxy: proxy, debtAddr: addrData[2], protocol1: enumData[0], protocol2: enumData[1], swapType: enumData[2] }); exchangeData = SaverExchangeCore.ExchangeData({ srcAddr: addrData[4], destAddr: addrData[5], srcAmount: numData[4], destAmount: numData[5], minPrice: numData[6], wrapper: addrData[7], exchangeAddr: addrData[6], callData: callData, price0x: numData[7] }); } function sendToProxy(address payable _proxy, address _reserve, uint _amount) internal { if (_reserve != ETH_ADDRESS) { ERC20(_reserve).safeTransfer(_proxy, _amount); } _proxy.transfer(address(this).balance); } function getNameByProtocol(uint8 _proto) internal pure returns (string memory) { if (_proto == 0) { return "MCD_SHIFTER"; } else if (_proto == 1) { return "COMP_SHIFTER"; } } receive() external override(FlashLoanReceiverBase, SaverExchangeCore) payable {} } contract CompShifter is CompoundSaverHelper { address public constant COMPTROLLER_ADDR = 0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B; function getWholeDebt(uint _cdpId, address _joinAddr) public virtual returns(uint loanAmount) { return CTokenInterface(_joinAddr).borrowBalanceCurrent(msg.sender); } function close( address _cCollAddr, address _cBorrowAddr, uint _collAmount, uint _debtAmount ) public { address collAddr = getUnderlyingAddr(_cCollAddr); // payback debt paybackDebt(_debtAmount, _cBorrowAddr, getUnderlyingAddr(_cBorrowAddr), tx.origin); // draw coll if (CTokenInterface(_cBorrowAddr).borrowBalanceCurrent(address(this)) == 0) { uint cTokenBalance = CTokenInterface(_cCollAddr).balanceOf(address(this)); require(CTokenInterface(_cCollAddr).redeem(cTokenBalance) == 0); } else { require(CTokenInterface(_cCollAddr).redeemUnderlying(_collAmount) == 0); } // Send back money to repay FL if (collAddr == ETH_ADDRESS) { msg.sender.transfer(address(this).balance); } else { ERC20(collAddr).transfer(msg.sender, ERC20(collAddr).balanceOf(address(this))); } } function changeDebt( address _cBorrowAddrOld, address _cBorrowAddrNew, uint _debtAmountOld, uint _debtAmountNew ) public { address borrowAddrNew = getUnderlyingAddr(_cBorrowAddrNew); // payback debt in one token paybackDebt(_debtAmountOld, _cBorrowAddrOld, getUnderlyingAddr(_cBorrowAddrOld), tx.origin); // draw debt in another one borrowCompound(_cBorrowAddrNew, _debtAmountNew); // Send back money to repay FL if (borrowAddrNew == ETH_ADDRESS) { msg.sender.transfer(address(this).balance); } else { ERC20(borrowAddrNew).transfer(msg.sender, ERC20(borrowAddrNew).balanceOf(address(this))); } } function open( address _cCollAddr, address _cBorrowAddr, uint _debtAmount ) public { address collAddr = getUnderlyingAddr(_cCollAddr); address borrowAddr = getUnderlyingAddr(_cBorrowAddr); uint collAmount = 0; if (collAddr == ETH_ADDRESS) { collAmount = address(this).balance; } else { collAmount = ERC20(collAddr).balanceOf(address(this)); } depositCompound(collAddr, _cCollAddr, collAmount); // draw debt borrowCompound(_cBorrowAddr, _debtAmount); // Send back money to repay FL if (borrowAddr == ETH_ADDRESS) { msg.sender.transfer(address(this).balance); } else { ERC20(borrowAddr).transfer(msg.sender, ERC20(borrowAddr).balanceOf(address(this))); } } function repayAll(address _cTokenAddr) public { address tokenAddr = getUnderlyingAddr(_cTokenAddr); uint amount = ERC20(tokenAddr).balanceOf(address(this)); if (amount != 0) { paybackDebt(amount, _cTokenAddr, tokenAddr, tx.origin); } } function depositCompound(address _tokenAddr, address _cTokenAddr, uint _amount) internal { approveCToken(_tokenAddr, _cTokenAddr); enterMarket(_cTokenAddr); if (_tokenAddr != ETH_ADDRESS) { require(CTokenInterface(_cTokenAddr).mint(_amount) == 0, "mint error"); } else { CEtherInterface(_cTokenAddr).mint{value: _amount}(); } } function borrowCompound(address _cTokenAddr, uint _amount) internal { enterMarket(_cTokenAddr); require(CTokenInterface(_cTokenAddr).borrow(_amount) == 0); } function enterMarket(address _cTokenAddr) public { address[] memory markets = new address[](1); markets[0] = _cTokenAddr; ComptrollerInterface(COMPTROLLER_ADDR).enterMarkets(markets); } } contract McdShifter is MCDSaverProxy { address public constant OPEN_PROXY_ACTIONS = 0x6d0984E80a86f26c0dd564ca0CF74a8E9Da03305; function getLoanAmount(uint _cdpId, address _joinAddr) public view virtual returns(uint loanAmount) { bytes32 ilk = manager.ilks(_cdpId); (, uint rate,,,) = vat.ilks(ilk); (, uint art) = vat.urns(ilk, manager.urns(_cdpId)); uint dai = vat.dai(manager.urns(_cdpId)); uint rad = sub(mul(art, rate), dai); loanAmount = rad / RAY; loanAmount = mul(loanAmount, RAY) < rad ? loanAmount + 1 : loanAmount; } function close( uint _cdpId, address _joinAddr, uint _loanAmount, uint _collateral ) public { address owner = getOwner(manager, _cdpId); bytes32 ilk = manager.ilks(_cdpId); (uint maxColl, ) = getCdpInfo(manager, _cdpId, ilk); // repay dai debt cdp paybackDebt(_cdpId, ilk, _loanAmount, owner); maxColl = _collateral > maxColl ? maxColl : _collateral; // withdraw collateral from cdp drawMaxCollateral(_cdpId, _joinAddr, maxColl); // send back to msg.sender if (_joinAddr == ETH_JOIN_ADDRESS) { msg.sender.transfer(address(this).balance); } else { ERC20 collToken = ERC20(getCollateralAddr(_joinAddr)); collToken.transfer(msg.sender, collToken.balanceOf(address(this))); } } function open( uint _cdpId, address _joinAddr, uint _debtAmount ) public { uint collAmount = 0; if (_joinAddr == ETH_JOIN_ADDRESS) { collAmount = address(this).balance; } else { collAmount = ERC20(address(Join(_joinAddr).gem())).balanceOf(address(this)); } if (_cdpId == 0) { openAndWithdraw(collAmount, _debtAmount, address(this), _joinAddr); } else { // add collateral addCollateral(_cdpId, _joinAddr, collAmount); // draw debt drawDai(_cdpId, manager.ilks(_cdpId), _debtAmount); } // transfer to repay FL ERC20(DAI_ADDRESS).transfer(msg.sender, ERC20(DAI_ADDRESS).balanceOf(address(this))); if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } } function openAndWithdraw(uint _collAmount, uint _debtAmount, address _proxy, address _joinAddrTo) internal { bytes32 ilk = Join(_joinAddrTo).ilk(); if (_joinAddrTo == ETH_JOIN_ADDRESS) { MCDCreateProxyActions(OPEN_PROXY_ACTIONS).openLockETHAndDraw{value: address(this).balance}( address(manager), JUG_ADDRESS, ETH_JOIN_ADDRESS, DAI_JOIN_ADDRESS, ilk, _debtAmount, _proxy ); } else { ERC20(getCollateralAddr(_joinAddrTo)).approve(OPEN_PROXY_ACTIONS, uint256(-1)); MCDCreateProxyActions(OPEN_PROXY_ACTIONS).openLockGemAndDraw( address(manager), JUG_ADDRESS, _joinAddrTo, DAI_JOIN_ADDRESS, ilk, _collAmount, _debtAmount, true, _proxy ); } } function drawMaxCollateral(uint _cdpId, address _joinAddr, uint _amount) internal returns (uint) { manager.frob(_cdpId, -toPositiveInt(_amount), 0); manager.flux(_cdpId, address(this), _amount); uint joinAmount = _amount; if (Join(_joinAddr).dec() != 18) { joinAmount = _amount / (10 ** (18 - Join(_joinAddr).dec())); } Join(_joinAddr).exit(address(this), joinAmount); if (_joinAddr == ETH_JOIN_ADDRESS) { Join(_joinAddr).gem().withdraw(joinAmount); // Weth -> Eth } return joinAmount; } } contract AaveSaverProxy is GasBurner, SaverExchangeCore, AaveHelper { address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; uint public constant VARIABLE_RATE = 2; function repay(ExchangeData memory _data, uint _gasCost) public payable burnGas(20) { address lendingPoolCore = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); address payable user = payable(getUserAddress()); uint256 maxCollateral = getMaxCollateral(_data.srcAddr, address(this)); // don't swap more than maxCollateral _data.srcAmount = _data.srcAmount > maxCollateral ? maxCollateral : _data.srcAmount; // redeem collateral address aTokenCollateral = ILendingPool(lendingPoolCore).getReserveATokenAddress(_data.srcAddr); IAToken(aTokenCollateral).redeem(_data.srcAmount); uint256 destAmount = _data.srcAmount; if (_data.srcAddr != _data.destAddr) { // swap (, destAmount) = _sell(_data); destAmount -= getFee(destAmount, user, _gasCost, _data.destAddr); } else { destAmount -= getGasCost(destAmount, user, _gasCost, _data.destAddr); } // payback if (_data.destAddr == ETH_ADDR) { ILendingPool(lendingPool).repay{value: destAmount}(_data.destAddr, destAmount, payable(address(this))); } else { approveToken(_data.destAddr, lendingPoolCore); ILendingPool(lendingPool).repay(_data.destAddr, destAmount, payable(address(this))); } // first return 0x fee to msg.sender as it is the address that actually sent 0x fee sendContractBalance(ETH_ADDR, tx.origin, min(address(this).balance, msg.value)); // send all leftovers from dest addr to proxy owner sendFullContractBalance(_data.destAddr, user); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "AaveRepay", abi.encode(_data.srcAddr, _data.destAddr, _data.srcAmount, destAmount)); } function boost(ExchangeData memory _data, uint _gasCost) public payable burnGas(20) { address lendingPoolCore = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPoolCore(); address lendingPool = ILendingPoolAddressesProvider(AAVE_LENDING_POOL_ADDRESSES).getLendingPool(); (,,,,,,,,,bool collateralEnabled) = ILendingPool(lendingPool).getUserReserveData(_data.destAddr, address(this)); address payable user = payable(getUserAddress()); uint256 maxBorrow = getMaxBorrow(_data.srcAddr, address(this)); _data.srcAmount = _data.srcAmount > maxBorrow ? maxBorrow : _data.srcAmount; // borrow amount ILendingPool(lendingPool).borrow(_data.srcAddr, _data.srcAmount, VARIABLE_RATE, AAVE_REFERRAL_CODE); uint256 destAmount; if (_data.destAddr != _data.srcAddr) { _data.srcAmount -= getFee(_data.srcAmount, user, _gasCost, _data.srcAddr); // swap (, destAmount) = _sell(_data); } else { _data.srcAmount -= getGasCost(_data.srcAmount, user, _gasCost, _data.srcAddr); destAmount = _data.srcAmount; } if (_data.destAddr == ETH_ADDR) { ILendingPool(lendingPool).deposit{value: destAmount}(_data.destAddr, destAmount, AAVE_REFERRAL_CODE); } else { approveToken(_data.destAddr, lendingPoolCore); ILendingPool(lendingPool).deposit(_data.destAddr, destAmount, AAVE_REFERRAL_CODE); } if (!collateralEnabled) { ILendingPool(lendingPool).setUserUseReserveAsCollateral(_data.destAddr, true); } // returning to msg.sender as it is the address that actually sent 0x fee sendContractBalance(ETH_ADDR, tx.origin, min(address(this).balance, msg.value)); // send all leftovers from dest addr to proxy owner sendFullContractBalance(_data.destAddr, user); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "AaveBoost", abi.encode(_data.srcAddr, _data.destAddr, _data.srcAmount, destAmount)); } } contract CompoundLoanInfo is CompoundSafetyRatio { struct LoanData { address user; uint128 ratio; address[] collAddr; address[] borrowAddr; uint[] collAmounts; uint[] borrowAmounts; } struct TokenInfo { address cTokenAddress; address underlyingTokenAddress; uint collateralFactor; uint price; } struct TokenInfoFull { address underlyingTokenAddress; uint supplyRate; uint borrowRate; uint exchangeRate; uint marketLiquidity; uint totalSupply; uint totalBorrow; uint collateralFactor; uint price; } address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public constant CETH_ADDRESS = 0x4Ddc2D193948926D02f9B1fE9e1daa0718270ED5; /// @notice Calcualted the ratio of coll/debt for a compound user /// @param _user Address of the user function getRatio(address _user) public view returns (uint) { // For each asset the account is in return getSafetyRatio(_user); } /// @notice Fetches Compound prices for tokens /// @param _cTokens Arr. of cTokens for which to get the prices /// @return prices Array of prices function getPrices(address[] memory _cTokens) public view returns (uint[] memory prices) { prices = new uint[](_cTokens.length); address oracleAddr = comp.oracle(); for (uint i = 0; i < _cTokens.length; ++i) { prices[i] = CompoundOracleInterface(oracleAddr).getUnderlyingPrice(_cTokens[i]); } } /// @notice Fetches Compound collateral factors for tokens /// @param _cTokens Arr. of cTokens for which to get the coll. factors /// @return collFactors Array of coll. factors function getCollFactors(address[] memory _cTokens) public view returns (uint[] memory collFactors) { collFactors = new uint[](_cTokens.length); for (uint i = 0; i < _cTokens.length; ++i) { (, collFactors[i]) = comp.markets(_cTokens[i]); } } /// @notice Fetches all the collateral/debt address and amounts, denominated in usd /// @param _user Address of the user /// @return data LoanData information function getLoanData(address _user) public view returns (LoanData memory data) { address[] memory assets = comp.getAssetsIn(_user); address oracleAddr = comp.oracle(); data = LoanData({ user: _user, ratio: 0, collAddr: new address[](assets.length), borrowAddr: new address[](assets.length), collAmounts: new uint[](assets.length), borrowAmounts: new uint[](assets.length) }); uint collPos = 0; uint borrowPos = 0; for (uint i = 0; i < assets.length; i++) { address asset = assets[i]; (, uint cTokenBalance, uint borrowBalance, uint exchangeRateMantissa) = CTokenInterface(asset).getAccountSnapshot(_user); Exp memory oraclePrice; if (cTokenBalance != 0 || borrowBalance != 0) { oraclePrice = Exp({mantissa: CompoundOracleInterface(oracleAddr).getUnderlyingPrice(asset)}); } // Sum up collateral in Usd if (cTokenBalance != 0) { Exp memory exchangeRate = Exp({mantissa: exchangeRateMantissa}); (, Exp memory tokensToUsd) = mulExp(exchangeRate, oraclePrice); data.collAddr[collPos] = asset; (, data.collAmounts[collPos]) = mulScalarTruncate(tokensToUsd, cTokenBalance); collPos++; } // Sum up debt in Usd if (borrowBalance != 0) { data.borrowAddr[borrowPos] = asset; (, data.borrowAmounts[borrowPos]) = mulScalarTruncate(oraclePrice, borrowBalance); borrowPos++; } } data.ratio = uint128(getSafetyRatio(_user)); return data; } function getTokenBalances(address _user, address[] memory _cTokens) public view returns (uint[] memory balances, uint[] memory borrows) { balances = new uint[](_cTokens.length); borrows = new uint[](_cTokens.length); for (uint i = 0; i < _cTokens.length; i++) { address asset = _cTokens[i]; (, uint cTokenBalance, uint borrowBalance, uint exchangeRateMantissa) = CTokenInterface(asset).getAccountSnapshot(_user); Exp memory exchangeRate = Exp({mantissa: exchangeRateMantissa}); (, balances[i]) = mulScalarTruncate(exchangeRate, cTokenBalance); borrows[i] = borrowBalance; } } /// @notice Fetches all the collateral/debt address and amounts, denominated in usd /// @param _users Addresses of the user /// @return loans Array of LoanData information function getLoanDataArr(address[] memory _users) public view returns (LoanData[] memory loans) { loans = new LoanData[](_users.length); for (uint i = 0; i < _users.length; ++i) { loans[i] = getLoanData(_users[i]); } } /// @notice Calcualted the ratio of coll/debt for a compound user /// @param _users Addresses of the user /// @return ratios Array of ratios function getRatios(address[] memory _users) public view returns (uint[] memory ratios) { ratios = new uint[](_users.length); for (uint i = 0; i < _users.length; ++i) { ratios[i] = getSafetyRatio(_users[i]); } } /// @notice Information about cTokens /// @param _cTokenAddresses Array of cTokens addresses /// @return tokens Array of cTokens infomartion function getTokensInfo(address[] memory _cTokenAddresses) public returns(TokenInfo[] memory tokens) { tokens = new TokenInfo[](_cTokenAddresses.length); address oracleAddr = comp.oracle(); for (uint i = 0; i < _cTokenAddresses.length; ++i) { (, uint collFactor) = comp.markets(_cTokenAddresses[i]); tokens[i] = TokenInfo({ cTokenAddress: _cTokenAddresses[i], underlyingTokenAddress: getUnderlyingAddr(_cTokenAddresses[i]), collateralFactor: collFactor, price: CompoundOracleInterface(oracleAddr).getUnderlyingPrice(_cTokenAddresses[i]) }); } } /// @notice Information about cTokens /// @param _cTokenAddresses Array of cTokens addresses /// @return tokens Array of cTokens infomartion function getFullTokensInfo(address[] memory _cTokenAddresses) public returns(TokenInfoFull[] memory tokens) { tokens = new TokenInfoFull[](_cTokenAddresses.length); address oracleAddr = comp.oracle(); for (uint i = 0; i < _cTokenAddresses.length; ++i) { (, uint collFactor) = comp.markets(_cTokenAddresses[i]); CTokenInterface cToken = CTokenInterface(_cTokenAddresses[i]); tokens[i] = TokenInfoFull({ underlyingTokenAddress: getUnderlyingAddr(_cTokenAddresses[i]), supplyRate: cToken.supplyRatePerBlock(), borrowRate: cToken.borrowRatePerBlock(), exchangeRate: cToken.exchangeRateCurrent(), marketLiquidity: cToken.getCash(), totalSupply: cToken.totalSupply(), totalBorrow: cToken.totalBorrowsCurrent(), collateralFactor: collFactor, price: CompoundOracleInterface(oracleAddr).getUnderlyingPrice(_cTokenAddresses[i]) }); } } /// @notice Returns the underlying address of the cToken asset /// @param _cTokenAddress cToken address /// @return Token address of the cToken specified function getUnderlyingAddr(address _cTokenAddress) internal returns (address) { if (_cTokenAddress == CETH_ADDRESS) { return ETH_ADDRESS; } else { return CTokenInterface(_cTokenAddress).underlying(); } } } contract CompoundCreateReceiver is FlashLoanReceiverBase, SaverExchangeCore { ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); ShifterRegistry public constant shifterRegistry = ShifterRegistry(0x2E82103bD91053C781aaF39da17aE58ceE39d0ab); address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address payable public constant WALLET_ADDR = 0x322d58b9E75a6918f7e7849AEe0fF09369977e08; address public constant DISCOUNT_ADDR = 0x1b14E8D511c9A4395425314f849bD737BAF8208F; // solhint-disable-next-line no-empty-blocks constructor() public FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) {} /// @notice Called by Aave when sending back the FL amount /// @param _reserve The address of the borrowed token /// @param _amount Amount of FL tokens received /// @param _fee FL Aave fee /// @param _params The params that are sent from the original FL caller contract function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { // Format the call data for DSProxy (address payable proxyAddr, bytes memory proxyData, ExchangeData memory exchangeData) = packFunctionCall(_amount, _fee, _params); // Swap (, uint sellAmount) = _sell(exchangeData); // DFS fee getFee(sellAmount, exchangeData.destAddr, proxyAddr); // Send amount to DSProxy sendToProxy(proxyAddr, exchangeData.destAddr); address compOpenProxy = shifterRegistry.getAddr("COMP_SHIFTER"); // Execute the DSProxy call DSProxyInterface(proxyAddr).execute(compOpenProxy, proxyData); // Repay the loan with the money DSProxy sent back transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { // solhint-disable-next-line avoid-tx-origin tx.origin.transfer(address(this).balance); } } /// @notice Formats function data call so we can call it through DSProxy /// @param _amount Amount of FL /// @param _fee Fee of the FL /// @param _params Saver proxy params function packFunctionCall(uint _amount, uint _fee, bytes memory _params) internal pure returns (address payable, bytes memory proxyData, ExchangeData memory exchangeData) { ( uint[4] memory numData, // srcAmount, destAmount, minPrice, price0x address[6] memory cAddresses, // cCollAddr, cDebtAddr, srcAddr, destAddr, exchangeAddr, wrapper bytes memory callData, address proxy ) = abi.decode(_params, (uint256[4],address[6],bytes,address)); proxyData = abi.encodeWithSignature( "open(address,address,uint256)", cAddresses[0], cAddresses[1], (_amount + _fee)); exchangeData = SaverExchangeCore.ExchangeData({ srcAddr: cAddresses[2], destAddr: cAddresses[3], srcAmount: numData[0], destAmount: numData[1], minPrice: numData[2], wrapper: cAddresses[5], exchangeAddr: cAddresses[4], callData: callData, price0x: numData[3] }); return (payable(proxy), proxyData, exchangeData); } /// @notice Send the FL funds received to DSProxy /// @param _proxy DSProxy address /// @param _reserve Token address function sendToProxy(address payable _proxy, address _reserve) internal { if (_reserve != ETH_ADDRESS) { ERC20(_reserve).safeTransfer(_proxy, ERC20(_reserve).balanceOf(address(this))); } else { _proxy.transfer(address(this).balance); } } function getFee(uint _amount, address _tokenAddr, address _proxy) internal returns (uint feeAmount) { uint fee = 400; DSProxy proxy = DSProxy(payable(_proxy)); address user = proxy.owner(); if (Discount(DISCOUNT_ADDR).isCustomFeeSet(user)) { fee = Discount(DISCOUNT_ADDR).getCustomServiceFee(user); } feeAmount = (fee == 0) ? 0 : (_amount / fee); // fee can't go over 20% of the whole amount if (feeAmount > (_amount / 5)) { feeAmount = _amount / 5; } if (_tokenAddr == ETH_ADDRESS) { WALLET_ADDR.transfer(feeAmount); } else { ERC20(_tokenAddr).safeTransfer(WALLET_ADDR, feeAmount); } } // solhint-disable-next-line no-empty-blocks receive() external override(FlashLoanReceiverBase, SaverExchangeCore) payable {} } contract CompoundSaverFlashLoan is FlashLoanReceiverBase, SaverExchangeCore { ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); address payable public COMPOUND_SAVER_FLASH_PROXY = 0xcEAb38B5C88F33Dabe4D31BDD384E08215526632; address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; address public owner; using SafeERC20 for ERC20; constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public { owner = msg.sender; } /// @notice Called by Aave when sending back the FL amount /// @param _reserve The address of the borrowed token /// @param _amount Amount of FL tokens received /// @param _fee FL Aave fee /// @param _params The params that are sent from the original FL caller contract function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { // Format the call data for DSProxy (bytes memory proxyData, address payable proxyAddr) = packFunctionCall(_amount, _fee, _params); // Send Flash loan amount to DSProxy sendLoanToProxy(proxyAddr, _reserve, _amount); // Execute the DSProxy call DSProxyInterface(proxyAddr).execute(COMPOUND_SAVER_FLASH_PROXY, proxyData); // Repay the loan with the money DSProxy sent back transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } } /// @notice Formats function data call so we can call it through DSProxy /// @param _amount Amount of FL /// @param _fee Fee of the FL /// @param _params Saver proxy params /// @return proxyData Formated function call data function packFunctionCall(uint _amount, uint _fee, bytes memory _params) internal pure returns (bytes memory proxyData, address payable) { ( bytes memory exDataBytes, address[2] memory cAddresses, // cCollAddress, cBorrowAddress uint256 gasCost, bool isRepay, address payable proxyAddr ) = abi.decode(_params, (bytes,address[2],uint256,bool,address)); ExchangeData memory _exData = unpackExchangeData(exDataBytes); uint[2] memory flashLoanData = [_amount, _fee]; if (isRepay) { proxyData = abi.encodeWithSignature("flashRepay((address,address,uint256,uint256,uint256,address,address,bytes,uint256),address[2],uint256,uint256[2])", _exData, cAddresses, gasCost, flashLoanData); } else { proxyData = abi.encodeWithSignature("flashBoost((address,address,uint256,uint256,uint256,address,address,bytes,uint256),address[2],uint256,uint256[2])", _exData, cAddresses, gasCost, flashLoanData); } return (proxyData, proxyAddr); } /// @notice Send the FL funds received to DSProxy /// @param _proxy DSProxy address /// @param _reserve Token address /// @param _amount Amount of tokens function sendLoanToProxy(address payable _proxy, address _reserve, uint _amount) internal { if (_reserve != ETH_ADDRESS) { ERC20(_reserve).safeTransfer(_proxy, _amount); } _proxy.transfer(address(this).balance); } receive() external override(SaverExchangeCore, FlashLoanReceiverBase) payable {} } contract CompoundSaverFlashProxy is SaverExchangeCore, CompoundSaverHelper { address public constant DEFISAVER_LOGGER = 0x5c55B921f590a89C1Ebe84dF170E655a82b62126; using SafeERC20 for ERC20; /// @notice Repays the position and sends tokens back for FL /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress] /// @param _gasCost Gas cost for transaction /// @param _flashLoanData Data about FL [amount, fee] function flashRepay( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost, uint[2] memory _flashLoanData // amount, fee ) public payable { enterMarket(_cAddresses[0], _cAddresses[1]); address payable user = payable(getUserAddress()); uint flashBorrowed = _flashLoanData[0] + _flashLoanData[1]; uint maxColl = getMaxCollateral(_cAddresses[0], address(this)); // draw max coll require(CTokenInterface(_cAddresses[0]).redeemUnderlying(maxColl) == 0); address collToken = getUnderlyingAddr(_cAddresses[0]); address borrowToken = getUnderlyingAddr(_cAddresses[1]); uint swapAmount = 0; if (collToken != borrowToken) { // swap max coll + loanAmount _exData.srcAmount = maxColl + _flashLoanData[0]; (,swapAmount) = _sell(_exData); // get fee swapAmount -= getFee(swapAmount, user, _gasCost, _cAddresses[1]); } else { swapAmount = (maxColl + _flashLoanData[0]); swapAmount -= getGasCost(swapAmount, _gasCost, _cAddresses[1]); } // payback debt paybackDebt(swapAmount, _cAddresses[1], borrowToken, user); // draw collateral for loanAmount + loanFee require(CTokenInterface(_cAddresses[0]).redeemUnderlying(flashBorrowed) == 0); // repay flash loan returnFlashLoan(collToken, flashBorrowed); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "CompoundRepay", abi.encode(_exData.srcAmount, swapAmount, collToken, borrowToken)); } /// @notice Boosts the position and sends tokens back for FL /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress] /// @param _gasCost Gas cost for specific transaction /// @param _flashLoanData Data about FL [amount, fee] function flashBoost( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost, uint[2] memory _flashLoanData // amount, fee ) public payable { enterMarket(_cAddresses[0], _cAddresses[1]); address payable user = payable(getUserAddress()); uint flashBorrowed = _flashLoanData[0] + _flashLoanData[1]; // borrow max amount uint borrowAmount = getMaxBorrow(_cAddresses[1], address(this)); require(CTokenInterface(_cAddresses[1]).borrow(borrowAmount) == 0); address collToken = getUnderlyingAddr(_cAddresses[0]); address borrowToken = getUnderlyingAddr(_cAddresses[1]); uint swapAmount = 0; if (collToken != borrowToken) { // get dfs fee borrowAmount -= getFee((borrowAmount + _flashLoanData[0]), user, _gasCost, _cAddresses[1]); _exData.srcAmount = (borrowAmount + _flashLoanData[0]); (,swapAmount) = _sell(_exData); } else { swapAmount = (borrowAmount + _flashLoanData[0]); swapAmount -= getGasCost(swapAmount, _gasCost, _cAddresses[1]); } // deposit swaped collateral depositCollateral(collToken, _cAddresses[0], swapAmount); // borrow token to repay flash loan require(CTokenInterface(_cAddresses[1]).borrow(flashBorrowed) == 0); // repay flash loan returnFlashLoan(borrowToken, flashBorrowed); DefisaverLogger(DEFISAVER_LOGGER).Log(address(this), msg.sender, "CompoundBoost", abi.encode(_exData.srcAmount, swapAmount, collToken, borrowToken)); } /// @notice Helper method to deposit tokens in Compound /// @param _collToken Token address of the collateral /// @param _cCollToken CToken address of the collateral /// @param _depositAmount Amount to deposit function depositCollateral(address _collToken, address _cCollToken, uint _depositAmount) internal { approveCToken(_collToken, _cCollToken); if (_collToken != ETH_ADDRESS) { require(CTokenInterface(_cCollToken).mint(_depositAmount) == 0); } else { CEtherInterface(_cCollToken).mint{value: _depositAmount}(); // reverts on fail } } /// @notice Returns the tokens/ether to the msg.sender which is the FL contract /// @param _tokenAddr Address of token which we return /// @param _amount Amount to return function returnFlashLoan(address _tokenAddr, uint _amount) internal { if (_tokenAddr != ETH_ADDRESS) { ERC20(_tokenAddr).safeTransfer(msg.sender, _amount); } msg.sender.transfer(address(this).balance); } } contract CompoundSaverProxy is CompoundSaverHelper, SaverExchangeCore { DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); /// @notice Withdraws collateral, converts to borrowed token and repays debt /// @dev Called through the DSProxy /// @param _exData Exchange data /// @param _cAddresses Coll/Debt addresses [cCollAddress, cBorrowAddress] /// @param _gasCost Gas cost for specific transaction function repay( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost ) public payable { enterMarket(_cAddresses[0], _cAddresses[1]); address payable user = payable(getUserAddress()); uint maxColl = getMaxCollateral(_cAddresses[0], address(this)); uint collAmount = (_exData.srcAmount > maxColl) ? maxColl : _exData.srcAmount; require(CTokenInterface(_cAddresses[0]).redeemUnderlying(collAmount) == 0); address collToken = getUnderlyingAddr(_cAddresses[0]); address borrowToken = getUnderlyingAddr(_cAddresses[1]); uint swapAmount = 0; if (collToken != borrowToken) { (, swapAmount) = _sell(_exData); swapAmount -= getFee(swapAmount, user, _gasCost, _cAddresses[1]); } else { swapAmount = collAmount; swapAmount -= getGasCost(swapAmount, _gasCost, _cAddresses[1]); } paybackDebt(swapAmount, _cAddresses[1], borrowToken, user); // handle 0x fee tx.origin.transfer(address(this).balance); // log amount, collToken, borrowToken logger.Log(address(this), msg.sender, "CompoundRepay", abi.encode(_exData.srcAmount, swapAmount, collToken, borrowToken)); } /// @notice Borrows token, converts to collateral, and adds to position /// @dev Called through the DSProxy /// @param _exData Exchange data /// @param _cAddresses Coll/Debt addresses [cCollAddress, cBorrowAddress] /// @param _gasCost Gas cost for specific transaction function boost( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost ) public payable { enterMarket(_cAddresses[0], _cAddresses[1]); address payable user = payable(getUserAddress()); uint maxBorrow = getMaxBorrow(_cAddresses[1], address(this)); uint borrowAmount = (_exData.srcAmount > maxBorrow) ? maxBorrow : _exData.srcAmount; require(CTokenInterface(_cAddresses[1]).borrow(borrowAmount) == 0); address collToken = getUnderlyingAddr(_cAddresses[0]); address borrowToken = getUnderlyingAddr(_cAddresses[1]); uint swapAmount = 0; if (collToken != borrowToken) { borrowAmount -= getFee(borrowAmount, user, _gasCost, _cAddresses[1]); _exData.srcAmount = borrowAmount; (,swapAmount) = _sell(_exData); } else { swapAmount = borrowAmount; swapAmount -= getGasCost(swapAmount, _gasCost, _cAddresses[1]); } approveCToken(collToken, _cAddresses[0]); if (collToken != ETH_ADDRESS) { require(CTokenInterface(_cAddresses[0]).mint(swapAmount) == 0); } else { CEtherInterface(_cAddresses[0]).mint{value: swapAmount}(); // reverts on fail } // handle 0x fee tx.origin.transfer(address(this).balance); // log amount, collToken, borrowToken logger.Log(address(this), msg.sender, "CompoundBoost", abi.encode(_exData.srcAmount, swapAmount, collToken, borrowToken)); } } contract SaverExchange is SaverExchangeCore, AdminAuth, GasBurner { using SafeERC20 for ERC20; uint256 public constant SERVICE_FEE = 800; // 0.125% Fee // solhint-disable-next-line const-name-snakecase DefisaverLogger public constant logger = DefisaverLogger(0x5c55B921f590a89C1Ebe84dF170E655a82b62126); uint public burnAmount = 10; /// @notice Takes a src amount of tokens and converts it into the dest token /// @dev Takes fee from the _srcAmount before the exchange /// @param exData [srcAddr, destAddr, srcAmount, destAmount, minPrice, exchangeType, exchangeAddr, callData, price0x] /// @param _user User address who called the exchange function sell(ExchangeData memory exData, address payable _user) public payable burnGas(burnAmount) { // take fee uint dfsFee = getFee(exData.srcAmount, exData.srcAddr); exData.srcAmount = sub(exData.srcAmount, dfsFee); // Perform the exchange (address wrapper, uint destAmount) = _sell(exData); // send back any leftover ether or tokens sendLeftover(exData.srcAddr, exData.destAddr, _user); // log the event logger.Log(address(this), msg.sender, "ExchangeSell", abi.encode(wrapper, exData.srcAddr, exData.destAddr, exData.srcAmount, destAmount)); } /// @notice Takes a dest amount of tokens and converts it from the src token /// @dev Send always more than needed for the swap, extra will be returned /// @param exData [srcAddr, destAddr, srcAmount, destAmount, minPrice, exchangeType, exchangeAddr, callData, price0x] /// @param _user User address who called the exchange function buy(ExchangeData memory exData, address payable _user) public payable burnGas(burnAmount){ uint dfsFee = getFee(exData.srcAmount, exData.srcAddr); exData.srcAmount = sub(exData.srcAmount, dfsFee); // Perform the exchange (address wrapper, uint srcAmount) = _buy(exData); // send back any leftover ether or tokens sendLeftover(exData.srcAddr, exData.destAddr, _user); // log the event logger.Log(address(this), msg.sender, "ExchangeBuy", abi.encode(wrapper, exData.srcAddr, exData.destAddr, srcAmount, exData.destAmount)); } /// @notice Takes a feePercentage and sends it to wallet /// @param _amount Dai amount of the whole trade /// @param _token Address of the token /// @return feeAmount Amount in Dai owner earned on the fee function getFee(uint256 _amount, address _token) internal returns (uint256 feeAmount) { uint256 fee = SERVICE_FEE; if (Discount(DISCOUNT_ADDRESS).isCustomFeeSet(msg.sender)) { fee = Discount(DISCOUNT_ADDRESS).getCustomServiceFee(msg.sender); } if (fee == 0) { feeAmount = 0; } else { feeAmount = _amount / fee; if (_token == KYBER_ETH_ADDRESS) { WALLET_ID.transfer(feeAmount); } else { ERC20(_token).safeTransfer(WALLET_ID, feeAmount); } } } /// @notice Changes the amount of gas token we burn for each call /// @dev Only callable by the owner /// @param _newBurnAmount New amount of gas tokens to be burned function changeBurnAmount(uint _newBurnAmount) public { require(owner == msg.sender); burnAmount = _newBurnAmount; } } contract MCDSaverFlashLoan is MCDSaverProxy, AdminAuth, FlashLoanReceiverBase { ILendingPoolAddressesProvider public LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) public {} struct SaverData { uint cdpId; uint gasCost; uint loanAmount; uint fee; address joinAddr; } function executeOperation( address _reserve, uint256 _amount, uint256 _fee, bytes calldata _params) external override { //check the contract has the specified balance require(_amount <= getBalanceInternal(address(this), _reserve), "Invalid balance for the contract"); ( bytes memory exDataBytes, uint cdpId, uint gasCost, address joinAddr, bool isRepay ) = abi.decode(_params, (bytes,uint256,uint256,address,bool)); ExchangeData memory exchangeData = unpackExchangeData(exDataBytes); SaverData memory saverData = SaverData({ cdpId: cdpId, gasCost: gasCost, loanAmount: _amount, fee: _fee, joinAddr: joinAddr }); if (isRepay) { repayWithLoan(exchangeData, saverData); } else { boostWithLoan(exchangeData, saverData); } transferFundsBackToPoolInternal(_reserve, _amount.add(_fee)); // if there is some eth left (0x fee), return it to user if (address(this).balance > 0) { tx.origin.transfer(address(this).balance); } } function boostWithLoan( ExchangeData memory _exchangeData, SaverData memory _saverData ) internal { address user = getOwner(manager, _saverData.cdpId); // Draw users Dai uint maxDebt = getMaxDebt(_saverData.cdpId, manager.ilks(_saverData.cdpId)); uint daiDrawn = drawDai(_saverData.cdpId, manager.ilks(_saverData.cdpId), maxDebt); // Calc. fees uint dsfFee = getFee((daiDrawn + _saverData.loanAmount), _saverData.gasCost, user); uint afterFee = (daiDrawn + _saverData.loanAmount) - dsfFee; // Swap _exchangeData.srcAmount = afterFee; (, uint swapedAmount) = _sell(_exchangeData); // Return collateral addCollateral(_saverData.cdpId, _saverData.joinAddr, swapedAmount); // Draw Dai to repay the flash loan drawDai(_saverData.cdpId, manager.ilks(_saverData.cdpId), (_saverData.loanAmount + _saverData.fee)); logger.Log(address(this), msg.sender, "MCDFlashBoost", abi.encode(_saverData.cdpId, owner, _exchangeData.srcAmount, swapedAmount)); } function repayWithLoan( ExchangeData memory _exchangeData, SaverData memory _saverData ) internal { address user = getOwner(manager, _saverData.cdpId); bytes32 ilk = manager.ilks(_saverData.cdpId); // Draw collateral uint maxColl = getMaxCollateral(_saverData.cdpId, ilk, _saverData.joinAddr); uint collDrawn = drawCollateral(_saverData.cdpId, _saverData.joinAddr, maxColl); // Swap _exchangeData.srcAmount = (_saverData.loanAmount + collDrawn); (, uint swapedAmount) = _sell(_exchangeData); uint paybackAmount = (swapedAmount - getFee(swapedAmount, _saverData.gasCost, user)); paybackAmount = limitLoanAmount(_saverData.cdpId, ilk, paybackAmount, user); // Payback the debt paybackDebt(_saverData.cdpId, ilk, paybackAmount, user); // Draw collateral to repay the flash loan drawCollateral(_saverData.cdpId, _saverData.joinAddr, (_saverData.loanAmount + _saverData.fee)); logger.Log(address(this), msg.sender, "MCDFlashRepay", abi.encode(_saverData.cdpId, owner, _exchangeData.srcAmount, swapedAmount)); } /// @notice Handles that the amount is not bigger than cdp debt and not dust function limitLoanAmount(uint _cdpId, bytes32 _ilk, uint _paybackAmount, address _owner) internal returns (uint256) { uint debt = getAllDebt(address(vat), manager.urns(_cdpId), manager.urns(_cdpId), _ilk); if (_paybackAmount > debt) { ERC20(DAI_ADDRESS).transfer(_owner, (_paybackAmount - debt)); return debt; } uint debtLeft = debt - _paybackAmount; (,,,, uint dust) = vat.ilks(_ilk); dust = dust / 10**27; // Less than dust value if (debtLeft < dust) { uint amountOverDust = (dust - debtLeft); ERC20(DAI_ADDRESS).transfer(_owner, amountOverDust); return (_paybackAmount - amountOverDust); } return _paybackAmount; } receive() external override(FlashLoanReceiverBase, SaverExchangeCore) payable {} } contract CompoundFlashLoanTaker is CompoundSaverProxy, ProxyPermission, GasBurner { ILendingPool public constant lendingPool = ILendingPool(0x398eC7346DcD622eDc5ae82352F02bE94C62d119); address payable public constant COMPOUND_SAVER_FLASH_LOAN = 0xCeB190A35D9D4804b9CE8d0CF79239f6949BfCcB; /// @notice Repays the position with it's own fund or with FL if needed /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress, exchangeAddress] /// @param _gasCost Gas cost for specific transaction function repayWithLoan( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost ) public payable burnGas(25) { uint maxColl = getMaxCollateral(_cAddresses[0], address(this)); if (_exData.srcAmount <= maxColl) { repay(_exData, _cAddresses, _gasCost); } else { // 0x fee COMPOUND_SAVER_FLASH_LOAN.transfer(msg.value); uint loanAmount = (_exData.srcAmount - maxColl); bytes memory encoded = packExchangeData(_exData); bytes memory paramsData = abi.encode(encoded, _cAddresses, _gasCost, true, address(this)); givePermission(COMPOUND_SAVER_FLASH_LOAN); lendingPool.flashLoan(COMPOUND_SAVER_FLASH_LOAN, getUnderlyingAddr(_cAddresses[0]), loanAmount, paramsData); removePermission(COMPOUND_SAVER_FLASH_LOAN); logger.Log(address(this), msg.sender, "CompoundFlashRepay", abi.encode(loanAmount, _exData.srcAmount, _cAddresses[0])); } } /// @notice Boosts the position with it's own fund or with FL if needed /// @param _exData Exchange data /// @param _cAddresses cTokens addreses and exchange [cCollAddress, cBorrowAddress, exchangeAddress] /// @param _gasCost Gas cost for specific transaction function boostWithLoan( ExchangeData memory _exData, address[2] memory _cAddresses, // cCollAddress, cBorrowAddress uint256 _gasCost ) public payable burnGas(20) { uint maxBorrow = getMaxBorrow(_cAddresses[1], address(this)); if (_exData.srcAmount <= maxBorrow) { boost(_exData, _cAddresses, _gasCost); } else { // 0x fee COMPOUND_SAVER_FLASH_LOAN.transfer(msg.value); uint loanAmount = (_exData.srcAmount - maxBorrow); bytes memory paramsData = abi.encode(packExchangeData(_exData), _cAddresses, _gasCost, false, address(this)); givePermission(COMPOUND_SAVER_FLASH_LOAN); lendingPool.flashLoan(COMPOUND_SAVER_FLASH_LOAN, getUnderlyingAddr(_cAddresses[1]), loanAmount, paramsData); removePermission(COMPOUND_SAVER_FLASH_LOAN); logger.Log(address(this), msg.sender, "CompoundFlashBoost", abi.encode(loanAmount, _exData.srcAmount, _cAddresses[1])); } } }

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{"success": true, "error": null, "results": {"detectors": [{"check": "tx-origin", "impact": "Medium", "confidence": "Medium"}, {"check": "name-reused", "impact": "High", "confidence": "High"}, {"check": "erc20-interface", "impact": "Medium", "confidence": "High"}, {"check": "arbitrary-send", "impact": "High", "confidence": "Medium"}, {"check": "unchecked-lowlevel", "impact": "Medium", "confidence": "Medium"}, {"check": "incorrect-equality", "impact": "Medium", "confidence": "High"}, {"check": "uninitialized-local", "impact": "Medium", "confidence": "Medium"}, {"check": "unchecked-transfer", "impact": "High", "confidence": "Medium"}, {"check": "unused-return", "impact": "Medium", "confidence": "Medium"}, {"check": "locked-ether", "impact": "Medium", "confidence": "High"}]}}

0x8d4439e2199528e28ddc1d4522fd086c70b0401c

pragma solidity 0.6.5; pragma experimental ABIEncoderV2; interface ERC20 { function approve(address, uint256) external returns (bool); function transfer(address, uint256) external returns (bool); function transferFrom(address, address, uint256) external returns (bool); function name() external view returns (string memory); function symbol() external view returns (string memory); function decimals() external view returns (uint8); function totalSupply() external view returns (uint256); function balanceOf(address) external view returns (uint256); } interface ProtocolAdapter { /** * @dev MUST return "Asset" or "Debt". * SHOULD be implemented by the public constant state variable. */ function adapterType() external pure returns (string memory); /** * @dev MUST return token type (default is "ERC20"). * SHOULD be implemented by the public constant state variable. */ function tokenType() external pure returns (string memory); /** * @dev MUST return amount of the given token locked on the protocol by the given account. */ function getBalance(address token, address account) external view returns (uint256); } interface CToken { function borrowBalanceStored(address) external view returns (uint256); } interface CompoundRegistry { function getCToken(address) external view returns (address); } contract CompoundDebtAdapter is ProtocolAdapter { address internal constant REGISTRY = 0x745eC6C92E3Fa2Ac470B3323128c6ad2eAB21d67; string public constant override adapterType = "Debt"; string public constant override tokenType = "ERC20"; /** * @return Amount of debt of the given account for the protocol. * @dev Implementation of ProtocolAdapter interface function. */ function getBalance(address token, address account) external view override returns (uint256) { address cToken = CompoundRegistry(REGISTRY).getCToken(token); return CToken(cToken).borrowBalanceStored(account); } }

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{"success": true, "error": null, "results": {}}

0x8D4a713865Af7d571536a38ca9629AA91FF3fC2b

pragma solidity 0.5.5; contract Context { // Empty internal constructor, to prevent people from mistakenly deploying // an instance of this contract, which should be used via inheritance. constructor () internal { } // solhint-disable-previous-line no-empty-blocks function _msgSender() internal view returns (address payable) { return msg.sender; } function _msgData() internal view returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot overflow. * * _Available since v2.4.0._ */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. * * _Available since v2.4.0._ */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { // Solidity only automatically asserts when dividing by 0 require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. * * _Available since v2.4.0._ */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor () internal { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), msgSender); } /** * @dev Returns the address of the current owner. */ function owner() public view returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(isOwner(), "Ownable: caller is not the owner"); _; } /** * @dev Returns true if the caller is the current owner. */ function isOwner() public view returns (bool) { return _msgSender() == _owner; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public onlyOwner { emit OwnershipTransferred(_owner, address(0)); _owner = address(0); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public onlyOwner { _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). */ function _transferOwnership(address newOwner) internal { require(newOwner != address(0), "Ownable: new owner is the zero address"); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } } interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } library SafeERC20 { using SafeMath for uint256; using Address for address; function safeTransfer(IERC20 token, address to, uint256 value) internal { callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal { callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value)); } function safeApprove(IERC20 token, address spender, uint256 value) internal { // safeApprove should only be called when setting an initial allowance, // or when resetting it to zero. To increase and decrease it, use // 'safeIncreaseAllowance' and 'safeDecreaseAllowance' // solhint-disable-next-line max-line-length require((value == 0) || (token.allowance(address(this), spender) == 0), "SafeERC20: approve from non-zero to non-zero allowance" ); callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value)); } function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).add(value); callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero"); callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). */ function callOptionalReturn(IERC20 token, bytes memory data) private { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. // A Solidity high level call has three parts: // 1. The target address is checked to verify it contains contract code // 2. The call itself is made, and success asserted // 3. The return value is decoded, which in turn checks the size of the returned data. // solhint-disable-next-line max-line-length require(address(token).isContract(), "SafeERC20: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = address(token).call(data); require(success, "SafeERC20: low-level call failed"); if (returndata.length > 0) { // Return data is optional // solhint-disable-next-line max-line-length require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } } } library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // According to EIP-1052, 0x0 is the value returned for not-yet created accounts // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned // for accounts without code, i.e. `keccak256('')` bytes32 codehash; bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470; // solhint-disable-next-line no-inline-assembly assembly { codehash := extcodehash(account) } return (codehash != accountHash && codehash != 0x0); } /** * @dev Converts an `address` into `address payable`. Note that this is * simply a type cast: the actual underlying value is not changed. * * _Available since v2.4.0._ */ function toPayable(address account) internal pure returns (address payable) { return address(uint160(account)); } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. * * _Available since v2.4.0._ */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-call-value (bool success, ) = recipient.call.value(amount)(""); require(success, "Address: unable to send value, recipient may have reverted"); } } contract MineTimelock is Ownable { using SafeERC20 for IERC20; // ERC20 basic token contract being held IERC20 private _token; // beneficiary of tokens after they are released address private _beneficiary; // timestamp when token release is enabled uint256 private _releaseTime; event BeneficiaryUpdated(address newBeneficiary); constructor (IERC20 token, address beneficiary, uint256 releaseTime) public { // solhint-disable-next-line not-rely-on-time require(releaseTime > block.timestamp, "TokenTimelock: release time is before current time"); _token = token; _beneficiary = beneficiary; _releaseTime = releaseTime; } function changeBeneficiary(address beneficiary) public onlyOwner() { _beneficiary = beneficiary; emit BeneficiaryUpdated(beneficiary); } /** * @return the token being held. */ function token() public view returns (IERC20) { return _token; } /** * @return the beneficiary of the tokens. */ function beneficiary() public view returns (address) { return _beneficiary; } /** * @return the time when the tokens are released. */ function releaseTime() public view returns (uint256) { return _releaseTime; } /** * @notice Transfers tokens held by timelock to beneficiary. */ function release() public { // solhint-disable-next-line not-rely-on-time require(block.timestamp >= _releaseTime, "TokenTimelock: current time is before release time"); uint256 amount = _token.balanceOf(address(this)); require(amount > 0, "TokenTimelock: no tokens to release"); _token.safeTransfer(_beneficiary, amount); } }

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0x8d53a8d660aa917755f28bb81ea79de94187f4af

pragma solidity 0.6.5; pragma experimental ABIEncoderV2; interface ERC20 { function approve(address, uint256) external returns (bool); function transfer(address, uint256) external returns (bool); function transferFrom(address, address, uint256) external returns (bool); function name() external view returns (string memory); function symbol() external view returns (string memory); function decimals() external view returns (uint8); function totalSupply() external view returns (uint256); function balanceOf(address) external view returns (uint256); } interface ProtocolAdapter { /** * @dev MUST return "Asset" or "Debt". * SHOULD be implemented by the public constant state variable. */ function adapterType() external pure returns (string memory); /** * @dev MUST return token type (default is "ERC20"). * SHOULD be implemented by the public constant state variable. */ function tokenType() external pure returns (string memory); /** * @dev MUST return amount of the given token locked on the protocol by the given account. */ function getBalance(address token, address account) external view returns (uint256); } interface ValidatorShare { function getLiquidRewards(address) external view returns (uint256); } contract MaticStakingAdapter is ProtocolAdapter { string public constant override adapterType = "Asset"; string public constant override tokenType = "ERC20"; address internal constant VALIDATOR_SHARE = 0xD9AeF0814e7eCBB4447eab08EDe33b6EBC29F842; /** * @return Amount of MATIC tokens locked on the StakingManager contract by the given account. * @dev Implementation of ProtocolAdapter interface function. */ function getBalance(address, address account) external view override returns (uint256) { uint256 totalBalance = 0; totalBalance += ERC20(VALIDATOR_SHARE).balanceOf(account); totalBalance += ValidatorShare(VALIDATOR_SHARE).getLiquidRewards(account); return totalBalance; } }

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0x8da0a907a1bdbb440d1fdb450672a8c003bc4f3a

pragma solidity 0.7.1; pragma experimental ABIEncoderV2; struct FullAbsoluteTokenAmount { AbsoluteTokenAmountMeta base; AbsoluteTokenAmountMeta[] underlying; } struct AbsoluteTokenAmountMeta { AbsoluteTokenAmount absoluteTokenAmount; ERC20Metadata erc20metadata; } struct ERC20Metadata { string name; string symbol; uint8 decimals; } struct AdapterBalance { bytes32 protocolAdapterName; AbsoluteTokenAmount[] absoluteTokenAmounts; } struct AbsoluteTokenAmount { address token; uint256 amount; } struct Component { address token; uint256 rate; } struct TransactionData { Action[] actions; TokenAmount[] inputs; Fee fee; AbsoluteTokenAmount[] requiredOutputs; uint256 nonce; } struct Action { bytes32 protocolAdapterName; ActionType actionType; TokenAmount[] tokenAmounts; bytes data; } struct TokenAmount { address token; uint256 amount; AmountType amountType; } struct Fee { uint256 share; address beneficiary; } enum ActionType { None, Deposit, Withdraw } enum AmountType { None, Relative, Absolute } abstract contract ProtocolAdapter { /** * @dev MUST return amount and type of the given token * locked on the protocol by the given account. */ function getBalance( address token, address account ) public view virtual returns (uint256); } contract CurveExchangeAdapter is ProtocolAdapter { /** * @notice This function is unavailable for exchange adapter. * @dev Implementation of ProtocolAdapter abstract contract function. */ function getBalance( address, address ) public pure override returns (uint256) { revert("CEA: no balance"); } } abstract contract InteractiveAdapter is ProtocolAdapter { uint256 internal constant DELIMITER = 1e18; address internal constant ETH = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; /** * @dev The function must deposit assets to the protocol. * @return MUST return assets to be sent back to the `msg.sender`. */ function deposit( TokenAmount[] calldata tokenAmounts, bytes calldata data ) external payable virtual returns (address[] memory); /** * @dev The function must withdraw assets from the protocol. * @return MUST return assets to be sent back to the `msg.sender`. */ function withdraw( TokenAmount[] calldata tokenAmounts, bytes calldata data ) external payable virtual returns (address[] memory); function getAbsoluteAmountDeposit( TokenAmount calldata tokenAmount ) internal view virtual returns (uint256) { address token = tokenAmount.token; uint256 amount = tokenAmount.amount; AmountType amountType = tokenAmount.amountType; require( amountType == AmountType.Relative || amountType == AmountType.Absolute, "IA: bad amount type" ); if (amountType == AmountType.Relative) { require(amount <= DELIMITER, "IA: bad amount"); uint256 balance; if (token == ETH) { balance = address(this).balance; } else { balance = ERC20(token).balanceOf(address(this)); } if (amount == DELIMITER) { return balance; } else { return mul(balance, amount) / DELIMITER; } } else { return amount; } } function getAbsoluteAmountWithdraw( TokenAmount calldata tokenAmount ) internal view virtual returns (uint256) { address token = tokenAmount.token; uint256 amount = tokenAmount.amount; AmountType amountType = tokenAmount.amountType; require( amountType == AmountType.Relative || amountType == AmountType.Absolute, "IA: bad amount type" ); if (amountType == AmountType.Relative) { require(amount <= DELIMITER, "IA: bad amount"); uint256 balance = getBalance(token, address(this)); if (amount == DELIMITER) { return balance; } else { return mul(balance, amount) / DELIMITER; } } else { return amount; } } function mul( uint256 a, uint256 b ) internal pure returns (uint256) { if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "IA: mul overflow"); return c; } } contract CurveExchangeInteractiveAdapter is CurveExchangeAdapter, InteractiveAdapter { using SafeERC20 for ERC20; /** * @notice Exchanges tokens using the given swap contract. * @param tokenAmounts Array with one element - TokenAmount struct with * "from" token address, "from" token amount to be deposited, and amount type. * @param data Token address to be exchanged to (ABI-encoded). * @param data ABI-encoded additional parameters: * - toToken - destination token address (one of those used in swap). * - swap - swap address. * - i - input token index. * - j - destination token index.this * - useUnderlying - true if swap_underlying() function should be called, * else swap() function will be called. * @dev Implementation of InteractiveAdapter function. */ function deposit( TokenAmount[] calldata tokenAmounts, bytes calldata data ) external payable override returns (address[] memory tokensToBeWithdrawn) { require(tokenAmounts.length == 1, "CEIA: should be 1 token"); address token = tokenAmounts[0].token; uint256 amount = getAbsoluteAmountDeposit(tokenAmounts[0]); (address toToken, address swap, int128 i, int128 j, bool useUnderlying) = abi.decode( data, (address, address, int128, int128, bool) ); tokensToBeWithdrawn = new address[](1); tokensToBeWithdrawn[0] = toToken; uint256 allowance = ERC20(token).allowance(address(this), swap); if (allowance < amount) { if (allowance > 0) { ERC20(token).safeApprove(swap, 0, "CEIA[1]"); } ERC20(token).safeApprove(swap, type(uint256).max, "CEIA[2]"); } // solhint-disable-next-line no-empty-blocks if (useUnderlying) { try Stableswap(swap).exchange_underlying(i, j, amount, 0) { } catch Error(string memory reason) { revert(reason); } catch { revert("CEIA: deposit fail[1]"); } } else { try Stableswap(swap).exchange(i, j, amount, 0) { } catch Error(string memory reason) { revert(reason); } catch { revert("CEIA: deposit fail[2]"); } } } /** * @notice Withdraw functionality is not supported. * @dev Implementation of InteractiveAdapter function. */ function withdraw( TokenAmount[] calldata, bytes calldata ) external payable override returns (address[] memory) { revert("CEIA: no withdraw"); } } interface Stableswap { /* solhint-disable-next-line func-name-mixedcase */ function exchange_underlying(int128, int128, uint256, uint256) external; function exchange(int128, int128, uint256, uint256) external; function coins(int128) external view returns (address); function coins(uint256) external view returns (address); function balances(int128) external view returns (uint256); function balances(uint256) external view returns (uint256); } interface ERC20 { function approve(address, uint256) external returns (bool); function transfer(address, uint256) external returns (bool); function transferFrom(address, address, uint256) external returns (bool); function name() external view returns (string memory); function symbol() external view returns (string memory); function decimals() external view returns (uint8); function totalSupply() external view returns (uint256); function balanceOf(address) external view returns (uint256); function allowance(address, address) external view returns (uint256); } library SafeERC20 { function safeTransfer( ERC20 token, address to, uint256 value, string memory location ) internal { callOptionalReturn( token, abi.encodeWithSelector( token.transfer.selector, to, value ), "transfer", location ); } function safeTransferFrom( ERC20 token, address from, address to, uint256 value, string memory location ) internal { callOptionalReturn( token, abi.encodeWithSelector( token.transferFrom.selector, from, to, value ), "transferFrom", location ); } function safeApprove( ERC20 token, address spender, uint256 value, string memory location ) internal { require( (value == 0) || (token.allowance(address(this), spender) == 0), "SafeERC20: bad approve call" ); callOptionalReturn( token, abi.encodeWithSelector( token.approve.selector, spender, value ), "approve", location ); } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), * relaxing the requirement on the return value: the return value is optional * (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). * @param location Location of the call (for debug). */ function callOptionalReturn( ERC20 token, bytes memory data, string memory functionName, string memory location ) private { // We need to perform a low level call here, to bypass Solidity's return data size checking // mechanism, since we're implementing it ourselves. // We implement two-steps call as callee is a contract is a responsibility of a caller. // 1. The call itself is made, and success asserted // 2. The return value is decoded, which in turn checks the size of the returned data. // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = address(token).call(data); require( success, string( abi.encodePacked( "SafeERC20: ", functionName, " failed in ", location ) ) ); if (returndata.length > 0) { // Return data is optional require( abi.decode(returndata, (bool)), string( abi.encodePacked( "SafeERC20: ", functionName, " returned false in ", location ) ) ); } } }

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{"success": true, "error": null, "results": {"detectors": [{"check": "incorrect-equality", "impact": "Medium", "confidence": "High"}, {"check": "uninitialized-local", "impact": "Medium", "confidence": "Medium"}, {"check": "locked-ether", "impact": "Medium", "confidence": "High"}]}}